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-rw-r--r--fs/btrfs/Makefile5
-rw-r--r--fs/btrfs/acl.c4
-rw-r--r--fs/btrfs/async-thread.c4
-rw-r--r--fs/btrfs/backref.c25
-rw-r--r--fs/btrfs/check-integrity.c105
-rw-r--r--fs/btrfs/ctree.c2
-rw-r--r--fs/btrfs/ctree.h169
-rw-r--r--fs/btrfs/delayed-inode.c7
-rw-r--r--fs/btrfs/dev-replace.c2
-rw-r--r--fs/btrfs/disk-io.c48
-rw-r--r--fs/btrfs/disk-io.h5
-rw-r--r--fs/btrfs/extent-tree.c177
-rw-r--r--fs/btrfs/extent_io.c310
-rw-r--r--fs/btrfs/extent_io.h136
-rw-r--r--fs/btrfs/extent_map.c2
-rw-r--r--fs/btrfs/extent_map.h10
-rw-r--r--fs/btrfs/file.c8
-rw-r--r--fs/btrfs/free-space-cache.c26
-rw-r--r--fs/btrfs/free-space-tree.c1591
-rw-r--r--fs/btrfs/free-space-tree.h72
-rw-r--r--fs/btrfs/inode-map.c2
-rw-r--r--fs/btrfs/inode.c211
-rw-r--r--fs/btrfs/ioctl.c39
-rw-r--r--fs/btrfs/locking.c2
-rw-r--r--fs/btrfs/raid56.c2
-rw-r--r--fs/btrfs/scrub.c6
-rw-r--r--fs/btrfs/send.c16
-rw-r--r--fs/btrfs/send.h4
-rw-r--r--fs/btrfs/super.c58
-rw-r--r--fs/btrfs/tests/btrfs-tests.c58
-rw-r--r--fs/btrfs/tests/btrfs-tests.h10
-rw-r--r--fs/btrfs/tests/extent-io-tests.c149
-rw-r--r--fs/btrfs/tests/free-space-tests.c225
-rw-r--r--fs/btrfs/tests/free-space-tree-tests.c571
-rw-r--r--fs/btrfs/tests/inode-tests.c2
-rw-r--r--fs/btrfs/tests/qgroup-tests.c20
-rw-r--r--fs/btrfs/transaction.c32
-rw-r--r--fs/btrfs/tree-defrag.c27
-rw-r--r--fs/btrfs/volumes.c87
-rw-r--r--fs/btrfs/volumes.h3
-rw-r--r--fs/btrfs/xattr.c2
41 files changed, 3530 insertions, 704 deletions
diff --git a/fs/btrfs/Makefile b/fs/btrfs/Makefile
index 6d1d0b93b1aa..128ce17a80b0 100644
--- a/fs/btrfs/Makefile
+++ b/fs/btrfs/Makefile
@@ -9,11 +9,12 @@ btrfs-y += super.o ctree.o extent-tree.o print-tree.o root-tree.o dir-item.o \
export.o tree-log.o free-space-cache.o zlib.o lzo.o \
compression.o delayed-ref.o relocation.o delayed-inode.o scrub.o \
reada.o backref.o ulist.o qgroup.o send.o dev-replace.o raid56.o \
- uuid-tree.o props.o hash.o
+ uuid-tree.o props.o hash.o free-space-tree.o
btrfs-$(CONFIG_BTRFS_FS_POSIX_ACL) += acl.o
btrfs-$(CONFIG_BTRFS_FS_CHECK_INTEGRITY) += check-integrity.o
btrfs-$(CONFIG_BTRFS_FS_RUN_SANITY_TESTS) += tests/free-space-tests.o \
tests/extent-buffer-tests.o tests/btrfs-tests.o \
- tests/extent-io-tests.o tests/inode-tests.o tests/qgroup-tests.o
+ tests/extent-io-tests.o tests/inode-tests.o tests/qgroup-tests.o \
+ tests/free-space-tree-tests.o
diff --git a/fs/btrfs/acl.c b/fs/btrfs/acl.c
index 9a0124a95851..dbbb8ed53a51 100644
--- a/fs/btrfs/acl.c
+++ b/fs/btrfs/acl.c
@@ -48,7 +48,7 @@ struct posix_acl *btrfs_get_acl(struct inode *inode, int type)
size = __btrfs_getxattr(inode, name, "", 0);
if (size > 0) {
- value = kzalloc(size, GFP_NOFS);
+ value = kzalloc(size, GFP_KERNEL);
if (!value)
return ERR_PTR(-ENOMEM);
size = __btrfs_getxattr(inode, name, value, size);
@@ -102,7 +102,7 @@ static int __btrfs_set_acl(struct btrfs_trans_handle *trans,
if (acl) {
size = posix_acl_xattr_size(acl->a_count);
- value = kmalloc(size, GFP_NOFS);
+ value = kmalloc(size, GFP_KERNEL);
if (!value) {
ret = -ENOMEM;
goto out;
diff --git a/fs/btrfs/async-thread.c b/fs/btrfs/async-thread.c
index 3e36e4adc4a3..88d9af3d4581 100644
--- a/fs/btrfs/async-thread.c
+++ b/fs/btrfs/async-thread.c
@@ -97,7 +97,7 @@ static struct __btrfs_workqueue *
__btrfs_alloc_workqueue(const char *name, unsigned int flags, int limit_active,
int thresh)
{
- struct __btrfs_workqueue *ret = kzalloc(sizeof(*ret), GFP_NOFS);
+ struct __btrfs_workqueue *ret = kzalloc(sizeof(*ret), GFP_KERNEL);
if (!ret)
return NULL;
@@ -148,7 +148,7 @@ struct btrfs_workqueue *btrfs_alloc_workqueue(const char *name,
int limit_active,
int thresh)
{
- struct btrfs_workqueue *ret = kzalloc(sizeof(*ret), GFP_NOFS);
+ struct btrfs_workqueue *ret = kzalloc(sizeof(*ret), GFP_KERNEL);
if (!ret)
return NULL;
diff --git a/fs/btrfs/backref.c b/fs/btrfs/backref.c
index d453d62ab0c6..b90cd3776f8e 100644
--- a/fs/btrfs/backref.c
+++ b/fs/btrfs/backref.c
@@ -520,13 +520,10 @@ static inline int ref_for_same_block(struct __prelim_ref *ref1,
static int __add_missing_keys(struct btrfs_fs_info *fs_info,
struct list_head *head)
{
- struct list_head *pos;
+ struct __prelim_ref *ref;
struct extent_buffer *eb;
- list_for_each(pos, head) {
- struct __prelim_ref *ref;
- ref = list_entry(pos, struct __prelim_ref, list);
-
+ list_for_each_entry(ref, head, list) {
if (ref->parent)
continue;
if (ref->key_for_search.type)
@@ -563,23 +560,15 @@ static int __add_missing_keys(struct btrfs_fs_info *fs_info,
*/
static void __merge_refs(struct list_head *head, int mode)
{
- struct list_head *pos1;
+ struct __prelim_ref *pos1;
- list_for_each(pos1, head) {
- struct list_head *n2;
- struct list_head *pos2;
- struct __prelim_ref *ref1;
+ list_for_each_entry(pos1, head, list) {
+ struct __prelim_ref *pos2 = pos1, *tmp;
- ref1 = list_entry(pos1, struct __prelim_ref, list);
-
- for (pos2 = pos1->next, n2 = pos2->next; pos2 != head;
- pos2 = n2, n2 = pos2->next) {
- struct __prelim_ref *ref2;
- struct __prelim_ref *xchg;
+ list_for_each_entry_safe_continue(pos2, tmp, head, list) {
+ struct __prelim_ref *xchg, *ref1 = pos1, *ref2 = pos2;
struct extent_inode_elem *eie;
- ref2 = list_entry(pos2, struct __prelim_ref, list);
-
if (!ref_for_same_block(ref1, ref2))
continue;
if (mode == 1) {
diff --git a/fs/btrfs/check-integrity.c b/fs/btrfs/check-integrity.c
index 0340c57bf377..861d472564c1 100644
--- a/fs/btrfs/check-integrity.c
+++ b/fs/btrfs/check-integrity.c
@@ -531,13 +531,9 @@ static struct btrfsic_block *btrfsic_block_hashtable_lookup(
(((unsigned int)(dev_bytenr >> 16)) ^
((unsigned int)((uintptr_t)bdev))) &
(BTRFSIC_BLOCK_HASHTABLE_SIZE - 1);
- struct list_head *elem;
-
- list_for_each(elem, h->table + hashval) {
- struct btrfsic_block *const b =
- list_entry(elem, struct btrfsic_block,
- collision_resolving_node);
+ struct btrfsic_block *b;
+ list_for_each_entry(b, h->table + hashval, collision_resolving_node) {
if (b->dev_state->bdev == bdev && b->dev_bytenr == dev_bytenr)
return b;
}
@@ -588,13 +584,9 @@ static struct btrfsic_block_link *btrfsic_block_link_hashtable_lookup(
((unsigned int)((uintptr_t)bdev_ref_to)) ^
((unsigned int)((uintptr_t)bdev_ref_from))) &
(BTRFSIC_BLOCK_LINK_HASHTABLE_SIZE - 1);
- struct list_head *elem;
-
- list_for_each(elem, h->table + hashval) {
- struct btrfsic_block_link *const l =
- list_entry(elem, struct btrfsic_block_link,
- collision_resolving_node);
+ struct btrfsic_block_link *l;
+ list_for_each_entry(l, h->table + hashval, collision_resolving_node) {
BUG_ON(NULL == l->block_ref_to);
BUG_ON(NULL == l->block_ref_from);
if (l->block_ref_to->dev_state->bdev == bdev_ref_to &&
@@ -639,13 +631,9 @@ static struct btrfsic_dev_state *btrfsic_dev_state_hashtable_lookup(
const unsigned int hashval =
(((unsigned int)((uintptr_t)bdev)) &
(BTRFSIC_DEV2STATE_HASHTABLE_SIZE - 1));
- struct list_head *elem;
-
- list_for_each(elem, h->table + hashval) {
- struct btrfsic_dev_state *const ds =
- list_entry(elem, struct btrfsic_dev_state,
- collision_resolving_node);
+ struct btrfsic_dev_state *ds;
+ list_for_each_entry(ds, h->table + hashval, collision_resolving_node) {
if (ds->bdev == bdev)
return ds;
}
@@ -1720,29 +1708,20 @@ static int btrfsic_read_block(struct btrfsic_state *state,
static void btrfsic_dump_database(struct btrfsic_state *state)
{
- struct list_head *elem_all;
+ const struct btrfsic_block *b_all;
BUG_ON(NULL == state);
printk(KERN_INFO "all_blocks_list:\n");
- list_for_each(elem_all, &state->all_blocks_list) {
- const struct btrfsic_block *const b_all =
- list_entry(elem_all, struct btrfsic_block,
- all_blocks_node);
- struct list_head *elem_ref_to;
- struct list_head *elem_ref_from;
+ list_for_each_entry(b_all, &state->all_blocks_list, all_blocks_node) {
+ const struct btrfsic_block_link *l;
printk(KERN_INFO "%c-block @%llu (%s/%llu/%d)\n",
btrfsic_get_block_type(state, b_all),
b_all->logical_bytenr, b_all->dev_state->name,
b_all->dev_bytenr, b_all->mirror_num);
- list_for_each(elem_ref_to, &b_all->ref_to_list) {
- const struct btrfsic_block_link *const l =
- list_entry(elem_ref_to,
- struct btrfsic_block_link,
- node_ref_to);
-
+ list_for_each_entry(l, &b_all->ref_to_list, node_ref_to) {
printk(KERN_INFO " %c @%llu (%s/%llu/%d)"
" refers %u* to"
" %c @%llu (%s/%llu/%d)\n",
@@ -1757,12 +1736,7 @@ static void btrfsic_dump_database(struct btrfsic_state *state)
l->block_ref_to->mirror_num);
}
- list_for_each(elem_ref_from, &b_all->ref_from_list) {
- const struct btrfsic_block_link *const l =
- list_entry(elem_ref_from,
- struct btrfsic_block_link,
- node_ref_from);
-
+ list_for_each_entry(l, &b_all->ref_from_list, node_ref_from) {
printk(KERN_INFO " %c @%llu (%s/%llu/%d)"
" is ref %u* from"
" %c @%llu (%s/%llu/%d)\n",
@@ -1845,8 +1819,7 @@ again:
&state->block_hashtable);
if (NULL != block) {
u64 bytenr = 0;
- struct list_head *elem_ref_to;
- struct list_head *tmp_ref_to;
+ struct btrfsic_block_link *l, *tmp;
if (block->is_superblock) {
bytenr = btrfs_super_bytenr((struct btrfs_super_block *)
@@ -1967,13 +1940,8 @@ again:
* because it still carries valueable information
* like whether it was ever written and IO completed.
*/
- list_for_each_safe(elem_ref_to, tmp_ref_to,
- &block->ref_to_list) {
- struct btrfsic_block_link *const l =
- list_entry(elem_ref_to,
- struct btrfsic_block_link,
- node_ref_to);
-
+ list_for_each_entry_safe(l, tmp, &block->ref_to_list,
+ node_ref_to) {
if (state->print_mask & BTRFSIC_PRINT_MASK_VERBOSE)
btrfsic_print_rem_link(state, l);
l->ref_cnt--;
@@ -2436,7 +2404,7 @@ static int btrfsic_check_all_ref_blocks(struct btrfsic_state *state,
struct btrfsic_block *const block,
int recursion_level)
{
- struct list_head *elem_ref_to;
+ const struct btrfsic_block_link *l;
int ret = 0;
if (recursion_level >= 3 + BTRFS_MAX_LEVEL) {
@@ -2464,11 +2432,7 @@ static int btrfsic_check_all_ref_blocks(struct btrfsic_state *state,
* This algorithm is recursive because the amount of used stack
* space is very small and the max recursion depth is limited.
*/
- list_for_each(elem_ref_to, &block->ref_to_list) {
- const struct btrfsic_block_link *const l =
- list_entry(elem_ref_to, struct btrfsic_block_link,
- node_ref_to);
-
+ list_for_each_entry(l, &block->ref_to_list, node_ref_to) {
if (state->print_mask & BTRFSIC_PRINT_MASK_VERBOSE)
printk(KERN_INFO
"rl=%d, %c @%llu (%s/%llu/%d)"
@@ -2561,7 +2525,7 @@ static int btrfsic_is_block_ref_by_superblock(
const struct btrfsic_block *block,
int recursion_level)
{
- struct list_head *elem_ref_from;
+ const struct btrfsic_block_link *l;
if (recursion_level >= 3 + BTRFS_MAX_LEVEL) {
/* refer to comment at "abort cyclic linkage (case 1)" */
@@ -2576,11 +2540,7 @@ static int btrfsic_is_block_ref_by_superblock(
* This algorithm is recursive because the amount of used stack space
* is very small and the max recursion depth is limited.
*/
- list_for_each(elem_ref_from, &block->ref_from_list) {
- const struct btrfsic_block_link *const l =
- list_entry(elem_ref_from, struct btrfsic_block_link,
- node_ref_from);
-
+ list_for_each_entry(l, &block->ref_from_list, node_ref_from) {
if (state->print_mask & BTRFSIC_PRINT_MASK_VERBOSE)
printk(KERN_INFO
"rl=%d, %c @%llu (%s/%llu/%d)"
@@ -2669,7 +2629,7 @@ static void btrfsic_dump_tree_sub(const struct btrfsic_state *state,
const struct btrfsic_block *block,
int indent_level)
{
- struct list_head *elem_ref_to;
+ const struct btrfsic_block_link *l;
int indent_add;
static char buf[80];
int cursor_position;
@@ -2704,11 +2664,7 @@ static void btrfsic_dump_tree_sub(const struct btrfsic_state *state,
}
cursor_position = indent_level;
- list_for_each(elem_ref_to, &block->ref_to_list) {
- const struct btrfsic_block_link *const l =
- list_entry(elem_ref_to, struct btrfsic_block_link,
- node_ref_to);
-
+ list_for_each_entry(l, &block->ref_to_list, node_ref_to) {
while (cursor_position < indent_level) {
printk(" ");
cursor_position++;
@@ -3165,8 +3121,7 @@ int btrfsic_mount(struct btrfs_root *root,
void btrfsic_unmount(struct btrfs_root *root,
struct btrfs_fs_devices *fs_devices)
{
- struct list_head *elem_all;
- struct list_head *tmp_all;
+ struct btrfsic_block *b_all, *tmp_all;
struct btrfsic_state *state;
struct list_head *dev_head = &fs_devices->devices;
struct btrfs_device *device;
@@ -3206,20 +3161,12 @@ void btrfsic_unmount(struct btrfs_root *root,
* just free all memory that was allocated dynamically.
* Free the blocks and the block_links.
*/
- list_for_each_safe(elem_all, tmp_all, &state->all_blocks_list) {
- struct btrfsic_block *const b_all =
- list_entry(elem_all, struct btrfsic_block,
- all_blocks_node);
- struct list_head *elem_ref_to;
- struct list_head *tmp_ref_to;
-
- list_for_each_safe(elem_ref_to, tmp_ref_to,
- &b_all->ref_to_list) {
- struct btrfsic_block_link *const l =
- list_entry(elem_ref_to,
- struct btrfsic_block_link,
- node_ref_to);
+ list_for_each_entry_safe(b_all, tmp_all, &state->all_blocks_list,
+ all_blocks_node) {
+ struct btrfsic_block_link *l, *tmp;
+ list_for_each_entry_safe(l, tmp, &b_all->ref_to_list,
+ node_ref_to) {
if (state->print_mask & BTRFSIC_PRINT_MASK_VERBOSE)
btrfsic_print_rem_link(state, l);
diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c
index be1be0422ff4..769e0ff1b4ce 100644
--- a/fs/btrfs/ctree.c
+++ b/fs/btrfs/ctree.c
@@ -1555,7 +1555,7 @@ noinline int btrfs_cow_block(struct btrfs_trans_handle *trans,
return 0;
}
- search_start = buf->start & ~((u64)(1024 * 1024 * 1024) - 1);
+ search_start = buf->start & ~((u64)SZ_1G - 1);
if (parent)
btrfs_set_lock_blocking(parent);
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 5e0fe0914d54..c5f40dc1f74f 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -35,6 +35,7 @@
#include <linux/btrfs.h>
#include <linux/workqueue.h>
#include <linux/security.h>
+#include <linux/sizes.h>
#include "extent_io.h"
#include "extent_map.h"
#include "async-thread.h"
@@ -96,6 +97,9 @@ struct btrfs_ordered_sum;
/* for storing items that use the BTRFS_UUID_KEY* types */
#define BTRFS_UUID_TREE_OBJECTID 9ULL
+/* tracks free space in block groups. */
+#define BTRFS_FREE_SPACE_TREE_OBJECTID 10ULL
+
/* for storing balance parameters in the root tree */
#define BTRFS_BALANCE_OBJECTID -4ULL
@@ -196,9 +200,9 @@ static const int btrfs_csum_sizes[] = { 4 };
/* ioprio of readahead is set to idle */
#define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0))
-#define BTRFS_DIRTY_METADATA_THRESH (32 * 1024 * 1024)
+#define BTRFS_DIRTY_METADATA_THRESH SZ_32M
-#define BTRFS_MAX_EXTENT_SIZE (128 * 1024 * 1024)
+#define BTRFS_MAX_EXTENT_SIZE SZ_128M
/*
* The key defines the order in the tree, and so it also defines (optimal)
@@ -500,6 +504,8 @@ struct btrfs_super_block {
* Compat flags that we support. If any incompat flags are set other than the
* ones specified below then we will fail to mount
*/
+#define BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE (1ULL << 0)
+
#define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
#define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
#define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
@@ -526,7 +532,10 @@ struct btrfs_super_block {
#define BTRFS_FEATURE_COMPAT_SUPP 0ULL
#define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL
#define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL
-#define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
+
+#define BTRFS_FEATURE_COMPAT_RO_SUPP \
+ (BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE)
+
#define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL
#define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL
@@ -1089,6 +1098,13 @@ struct btrfs_block_group_item {
__le64 flags;
} __attribute__ ((__packed__));
+struct btrfs_free_space_info {
+ __le32 extent_count;
+ __le32 flags;
+} __attribute__ ((__packed__));
+
+#define BTRFS_FREE_SPACE_USING_BITMAPS (1ULL << 0)
+
#define BTRFS_QGROUP_LEVEL_SHIFT 48
static inline u64 btrfs_qgroup_level(u64 qgroupid)
{
@@ -1297,6 +1313,9 @@ struct btrfs_caching_control {
atomic_t count;
};
+/* Once caching_thread() finds this much free space, it will wake up waiters. */
+#define CACHING_CTL_WAKE_UP (1024 * 1024 * 2)
+
struct btrfs_io_ctl {
void *cur, *orig;
struct page *page;
@@ -1322,8 +1341,20 @@ struct btrfs_block_group_cache {
u64 delalloc_bytes;
u64 bytes_super;
u64 flags;
- u64 sectorsize;
u64 cache_generation;
+ u32 sectorsize;
+
+ /*
+ * If the free space extent count exceeds this number, convert the block
+ * group to bitmaps.
+ */
+ u32 bitmap_high_thresh;
+
+ /*
+ * If the free space extent count drops below this number, convert the
+ * block group back to extents.
+ */
+ u32 bitmap_low_thresh;
/*
* It is just used for the delayed data space allocation because
@@ -1379,6 +1410,15 @@ struct btrfs_block_group_cache {
struct list_head io_list;
struct btrfs_io_ctl io_ctl;
+
+ /* Lock for free space tree operations. */
+ struct mutex free_space_lock;
+
+ /*
+ * Does the block group need to be added to the free space tree?
+ * Protected by free_space_lock.
+ */
+ int needs_free_space;
};
/* delayed seq elem */
@@ -1430,6 +1470,7 @@ struct btrfs_fs_info {
struct btrfs_root *csum_root;
struct btrfs_root *quota_root;
struct btrfs_root *uuid_root;
+ struct btrfs_root *free_space_root;
/* the log root tree is a directory of all the other log roots */
struct btrfs_root *log_root_tree;
@@ -1817,6 +1858,8 @@ struct btrfs_fs_info {
* and will be latter freed. Protected by fs_info->chunk_mutex.
*/
struct list_head pinned_chunks;
+
+ int creating_free_space_tree;
};
struct btrfs_subvolume_writers {
@@ -2093,6 +2136,27 @@ struct btrfs_ioctl_defrag_range_args {
*/
#define BTRFS_BLOCK_GROUP_ITEM_KEY 192
+/*
+ * Every block group is represented in the free space tree by a free space info
+ * item, which stores some accounting information. It is keyed on
+ * (block_group_start, FREE_SPACE_INFO, block_group_length).
+ */
+#define BTRFS_FREE_SPACE_INFO_KEY 198
+
+/*
+ * A free space extent tracks an extent of space that is free in a block group.
+ * It is keyed on (start, FREE_SPACE_EXTENT, length).
+ */
+#define BTRFS_FREE_SPACE_EXTENT_KEY 199
+
+/*
+ * When a block group becomes very fragmented, we convert it to use bitmaps
+ * instead of extents. A free space bitmap is keyed on
+ * (start, FREE_SPACE_BITMAP, length); the corresponding item is a bitmap with
+ * (length / sectorsize) bits.
+ */
+#define BTRFS_FREE_SPACE_BITMAP_KEY 200
+
#define BTRFS_DEV_EXTENT_KEY 204
#define BTRFS_DEV_ITEM_KEY 216
#define BTRFS_CHUNK_ITEM_KEY 228
@@ -2185,6 +2249,7 @@ struct btrfs_ioctl_defrag_range_args {
#define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23)
#define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24)
#define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25)
+#define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26)
#define BTRFS_DEFAULT_COMMIT_INTERVAL (30)
#define BTRFS_DEFAULT_MAX_INLINE (8192)
@@ -2507,6 +2572,11 @@ BTRFS_SETGET_FUNCS(disk_block_group_flags,
BTRFS_SETGET_STACK_FUNCS(block_group_flags,
struct btrfs_block_group_item, flags, 64);
+/* struct btrfs_free_space_info */
+BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info,
+ extent_count, 32);
+BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32);
+
/* struct btrfs_inode_ref */
BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
@@ -3574,6 +3644,9 @@ void btrfs_end_write_no_snapshoting(struct btrfs_root *root);
void check_system_chunk(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
const u64 type);
+u64 add_new_free_space(struct btrfs_block_group_cache *block_group,
+ struct btrfs_fs_info *info, u64 start, u64 end);
+
/* ctree.c */
int btrfs_bin_search(struct extent_buffer *eb, struct btrfs_key *key,
int level, int *slot);
@@ -3738,6 +3811,7 @@ static inline void free_fs_info(struct btrfs_fs_info *fs_info)
kfree(fs_info->csum_root);
kfree(fs_info->quota_root);
kfree(fs_info->uuid_root);
+ kfree(fs_info->free_space_root);
kfree(fs_info->super_copy);
kfree(fs_info->super_for_commit);
security_free_mnt_opts(&fs_info->security_opts);
@@ -3907,7 +3981,6 @@ void btrfs_extent_item_to_extent_map(struct inode *inode,
/* inode.c */
struct btrfs_delalloc_work {
struct inode *inode;
- int wait;
int delay_iput;
struct completion completion;
struct list_head list;
@@ -3915,7 +3988,7 @@ struct btrfs_delalloc_work {
};
struct btrfs_delalloc_work *btrfs_alloc_delalloc_work(struct inode *inode,
- int wait, int delay_iput);
+ int delay_iput);
void btrfs_wait_and_free_delalloc_work(struct btrfs_delalloc_work *work);
struct extent_map *btrfs_get_extent_fiemap(struct inode *inode, struct page *page,
@@ -4248,16 +4321,98 @@ static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info,
}
}
+#define btrfs_clear_fs_incompat(__fs_info, opt) \
+ __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
+
+static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info *fs_info,
+ u64 flag)
+{
+ struct btrfs_super_block *disk_super;
+ u64 features;
+
+ disk_super = fs_info->super_copy;
+ features = btrfs_super_incompat_flags(disk_super);
+ if (features & flag) {
+ spin_lock(&fs_info->super_lock);
+ features = btrfs_super_incompat_flags(disk_super);
+ if (features & flag) {
+ features &= ~flag;
+ btrfs_set_super_incompat_flags(disk_super, features);
+ btrfs_info(fs_info, "clearing %llu feature flag",
+ flag);
+ }
+ spin_unlock(&fs_info->super_lock);
+ }
+}
+
#define btrfs_fs_incompat(fs_info, opt) \
__btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
-static inline int __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
+static inline bool __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
{
struct btrfs_super_block *disk_super;
disk_super = fs_info->super_copy;
return !!(btrfs_super_incompat_flags(disk_super) & flag);
}
+#define btrfs_set_fs_compat_ro(__fs_info, opt) \
+ __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
+
+static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info *fs_info,
+ u64 flag)
+{
+ struct btrfs_super_block *disk_super;
+ u64 features;
+
+ disk_super = fs_info->super_copy;
+ features = btrfs_super_compat_ro_flags(disk_super);
+ if (!(features & flag)) {
+ spin_lock(&fs_info->super_lock);
+ features = btrfs_super_compat_ro_flags(disk_super);
+ if (!(features & flag)) {
+ features |= flag;
+ btrfs_set_super_compat_ro_flags(disk_super, features);
+ btrfs_info(fs_info, "setting %llu ro feature flag",
+ flag);
+ }
+ spin_unlock(&fs_info->super_lock);
+ }
+}
+
+#define btrfs_clear_fs_compat_ro(__fs_info, opt) \
+ __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
+
+static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info *fs_info,
+ u64 flag)
+{
+ struct btrfs_super_block *disk_super;
+ u64 features;
+
+ disk_super = fs_info->super_copy;
+ features = btrfs_super_compat_ro_flags(disk_super);
+ if (features & flag) {
+ spin_lock(&fs_info->super_lock);
+ features = btrfs_super_compat_ro_flags(disk_super);
+ if (features & flag) {
+ features &= ~flag;
+ btrfs_set_super_compat_ro_flags(disk_super, features);
+ btrfs_info(fs_info, "clearing %llu ro feature flag",
+ flag);
+ }
+ spin_unlock(&fs_info->super_lock);
+ }
+}
+
+#define btrfs_fs_compat_ro(fs_info, opt) \
+ __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
+
+static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag)
+{
+ struct btrfs_super_block *disk_super;
+ disk_super = fs_info->super_copy;
+ return !!(btrfs_super_compat_ro_flags(disk_super) & flag);
+}
+
/*
* Call btrfs_abort_transaction as early as possible when an error condition is
* detected, that way the exact line number is reported.
diff --git a/fs/btrfs/delayed-inode.c b/fs/btrfs/delayed-inode.c
index e0941fbb913c..0be47e4b8136 100644
--- a/fs/btrfs/delayed-inode.c
+++ b/fs/btrfs/delayed-inode.c
@@ -54,16 +54,11 @@ static inline void btrfs_init_delayed_node(
delayed_node->root = root;
delayed_node->inode_id = inode_id;
atomic_set(&delayed_node->refs, 0);
- delayed_node->count = 0;
- delayed_node->flags = 0;
delayed_node->ins_root = RB_ROOT;
delayed_node->del_root = RB_ROOT;
mutex_init(&delayed_node->mutex);
- delayed_node->index_cnt = 0;
INIT_LIST_HEAD(&delayed_node->n_list);
INIT_LIST_HEAD(&delayed_node->p_list);
- delayed_node->bytes_reserved = 0;
- memset(&delayed_node->inode_item, 0, sizeof(delayed_node->inode_item));
}
static inline int btrfs_is_continuous_delayed_item(
@@ -132,7 +127,7 @@ again:
if (node)
return node;
- node = kmem_cache_alloc(delayed_node_cache, GFP_NOFS);
+ node = kmem_cache_zalloc(delayed_node_cache, GFP_NOFS);
if (!node)
return ERR_PTR(-ENOMEM);
btrfs_init_delayed_node(node, root, ino);
diff --git a/fs/btrfs/dev-replace.c b/fs/btrfs/dev-replace.c
index 1e668fb7dd4c..cbb7dbfb3fff 100644
--- a/fs/btrfs/dev-replace.c
+++ b/fs/btrfs/dev-replace.c
@@ -614,7 +614,7 @@ static void btrfs_dev_replace_update_device_in_mapping_tree(
em = lookup_extent_mapping(em_tree, start, (u64)-1);
if (!em)
break;
- map = (struct map_lookup *)em->bdev;
+ map = em->map_lookup;
for (i = 0; i < map->num_stripes; i++)
if (srcdev == map->stripes[i].dev)
map->stripes[i].dev = tgtdev;
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 868736dbe6ee..64f02c3d0dd0 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -42,6 +42,7 @@
#include "locking.h"
#include "tree-log.h"
#include "free-space-cache.h"
+#include "free-space-tree.h"
#include "inode-map.h"
#include "check-integrity.h"
#include "rcu-string.h"
@@ -362,7 +363,7 @@ static int verify_parent_transid(struct extent_io_tree *io_tree,
}
lock_extent_bits(io_tree, eb->start, eb->start + eb->len - 1,
- 0, &cached_state);
+ &cached_state);
if (extent_buffer_uptodate(eb) &&
btrfs_header_generation(eb) == parent_transid) {
ret = 0;
@@ -1665,6 +1666,9 @@ struct btrfs_root *btrfs_get_fs_root(struct btrfs_fs_info *fs_info,
if (location->objectid == BTRFS_UUID_TREE_OBJECTID)
return fs_info->uuid_root ? fs_info->uuid_root :
ERR_PTR(-ENOENT);
+ if (location->objectid == BTRFS_FREE_SPACE_TREE_OBJECTID)
+ return fs_info->free_space_root ? fs_info->free_space_root :
+ ERR_PTR(-ENOENT);
again:
root = btrfs_lookup_fs_root(fs_info, location->objectid);
if (root) {
@@ -2163,6 +2167,7 @@ static void free_root_pointers(struct btrfs_fs_info *info, int chunk_root)
free_root_extent_buffers(info->uuid_root);
if (chunk_root)
free_root_extent_buffers(info->chunk_root);
+ free_root_extent_buffers(info->free_space_root);
}
void btrfs_free_fs_roots(struct btrfs_fs_info *fs_info)
@@ -2463,6 +2468,15 @@ static int btrfs_read_roots(struct btrfs_fs_info *fs_info,
fs_info->uuid_root = root;
}
+ if (btrfs_fs_compat_ro(fs_info, FREE_SPACE_TREE)) {
+ location.objectid = BTRFS_FREE_SPACE_TREE_OBJECTID;
+ root = btrfs_read_tree_root(tree_root, &location);
+ if (IS_ERR(root))
+ return PTR_ERR(root);
+ set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state);
+ fs_info->free_space_root = root;
+ }
+
return 0;
}
@@ -2825,7 +2839,7 @@ int open_ctree(struct super_block *sb,
fs_info->bdi.ra_pages *= btrfs_super_num_devices(disk_super);
fs_info->bdi.ra_pages = max(fs_info->bdi.ra_pages,
- 4 * 1024 * 1024 / PAGE_CACHE_SIZE);
+ SZ_4M / PAGE_CACHE_SIZE);
tree_root->nodesize = nodesize;
tree_root->sectorsize = sectorsize;
@@ -3079,6 +3093,18 @@ retry_root_backup:
if (sb->s_flags & MS_RDONLY)
return 0;
+ if (btrfs_test_opt(tree_root, FREE_SPACE_TREE) &&
+ !btrfs_fs_compat_ro(fs_info, FREE_SPACE_TREE)) {
+ pr_info("BTRFS: creating free space tree\n");
+ ret = btrfs_create_free_space_tree(fs_info);
+ if (ret) {
+ pr_warn("BTRFS: failed to create free space tree %d\n",
+ ret);
+ close_ctree(tree_root);
+ return ret;
+ }
+ }
+
down_read(&fs_info->cleanup_work_sem);
if ((ret = btrfs_orphan_cleanup(fs_info->fs_root)) ||
(ret = btrfs_orphan_cleanup(fs_info->tree_root))) {
@@ -3104,6 +3130,18 @@ retry_root_backup:
btrfs_qgroup_rescan_resume(fs_info);
+ if (btrfs_test_opt(tree_root, CLEAR_CACHE) &&
+ btrfs_fs_compat_ro(fs_info, FREE_SPACE_TREE)) {
+ pr_info("BTRFS: clearing free space tree\n");
+ ret = btrfs_clear_free_space_tree(fs_info);
+ if (ret) {
+ pr_warn("BTRFS: failed to clear free space tree %d\n",
+ ret);
+ close_ctree(tree_root);
+ return ret;
+ }
+ }
+
if (!fs_info->uuid_root) {
pr_info("BTRFS: creating UUID tree\n");
ret = btrfs_create_uuid_tree(fs_info);
@@ -3930,11 +3968,6 @@ int btrfs_buffer_uptodate(struct extent_buffer *buf, u64 parent_transid,
return !ret;
}
-int btrfs_set_buffer_uptodate(struct extent_buffer *buf)
-{
- return set_extent_buffer_uptodate(buf);
-}
-
void btrfs_mark_buffer_dirty(struct extent_buffer *buf)
{
struct btrfs_root *root;
@@ -3990,7 +4023,6 @@ static void __btrfs_btree_balance_dirty(struct btrfs_root *root,
balance_dirty_pages_ratelimited(
root->fs_info->btree_inode->i_mapping);
}
- return;
}
void btrfs_btree_balance_dirty(struct btrfs_root *root)
diff --git a/fs/btrfs/disk-io.h b/fs/btrfs/disk-io.h
index adeb31830b9c..8e79d0070bcf 100644
--- a/fs/btrfs/disk-io.h
+++ b/fs/btrfs/disk-io.h
@@ -19,7 +19,7 @@
#ifndef __DISKIO__
#define __DISKIO__
-#define BTRFS_SUPER_INFO_OFFSET (64 * 1024)
+#define BTRFS_SUPER_INFO_OFFSET SZ_64K
#define BTRFS_SUPER_INFO_SIZE 4096
#define BTRFS_SUPER_MIRROR_MAX 3
@@ -35,7 +35,7 @@ enum btrfs_wq_endio_type {
static inline u64 btrfs_sb_offset(int mirror)
{
- u64 start = 16 * 1024;
+ u64 start = SZ_16K;
if (mirror)
return start << (BTRFS_SUPER_MIRROR_SHIFT * mirror);
return BTRFS_SUPER_INFO_OFFSET;
@@ -116,7 +116,6 @@ static inline void btrfs_put_fs_root(struct btrfs_root *root)
void btrfs_mark_buffer_dirty(struct extent_buffer *buf);
int btrfs_buffer_uptodate(struct extent_buffer *buf, u64 parent_transid,
int atomic);
-int btrfs_set_buffer_uptodate(struct extent_buffer *buf);
int btrfs_read_buffer(struct extent_buffer *buf, u64 parent_transid);
u32 btrfs_csum_data(char *data, u32 seed, size_t len);
void btrfs_csum_final(u32 crc, char *result);
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 9e3639b21567..92843ab772a5 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -33,6 +33,7 @@
#include "raid56.h"
#include "locking.h"
#include "free-space-cache.h"
+#include "free-space-tree.h"
#include "math.h"
#include "sysfs.h"
#include "qgroup.h"
@@ -357,8 +358,8 @@ static void fragment_free_space(struct btrfs_root *root,
* we need to check the pinned_extents for any extents that can't be used yet
* since their free space will be released as soon as the transaction commits.
*/
-static u64 add_new_free_space(struct btrfs_block_group_cache *block_group,
- struct btrfs_fs_info *info, u64 start, u64 end)
+u64 add_new_free_space(struct btrfs_block_group_cache *block_group,
+ struct btrfs_fs_info *info, u64 start, u64 end)
{
u64 extent_start, extent_end, size, total_added = 0;
int ret;
@@ -395,11 +396,10 @@ static u64 add_new_free_space(struct btrfs_block_group_cache *block_group,
return total_added;
}
-static noinline void caching_thread(struct btrfs_work *work)
+static int load_extent_tree_free(struct btrfs_caching_control *caching_ctl)
{
struct btrfs_block_group_cache *block_group;
struct btrfs_fs_info *fs_info;
- struct btrfs_caching_control *caching_ctl;
struct btrfs_root *extent_root;
struct btrfs_path *path;
struct extent_buffer *leaf;
@@ -407,17 +407,16 @@ static noinline void caching_thread(struct btrfs_work *work)
u64 total_found = 0;
u64 last = 0;
u32 nritems;
- int ret = -ENOMEM;
+ int ret;
bool wakeup = true;
- caching_ctl = container_of(work, struct btrfs_caching_control, work);
block_group = caching_ctl->block_group;
fs_info = block_group->fs_info;
extent_root = fs_info->extent_root;
path = btrfs_alloc_path();
if (!path)
- goto out;
+ return -ENOMEM;
last = max_t(u64, block_group->key.objectid, BTRFS_SUPER_INFO_OFFSET);
@@ -443,15 +442,11 @@ static noinline void caching_thread(struct btrfs_work *work)
key.objectid = last;
key.offset = 0;
key.type = BTRFS_EXTENT_ITEM_KEY;
-again:
- mutex_lock(&caching_ctl->mutex);
- /* need to make sure the commit_root doesn't disappear */
- down_read(&fs_info->commit_root_sem);
next:
ret = btrfs_search_slot(NULL, extent_root, &key, path, 0, 0);
if (ret < 0)
- goto err;
+ goto out;
leaf = path->nodes[0];
nritems = btrfs_header_nritems(leaf);
@@ -477,12 +472,14 @@ next:
up_read(&fs_info->commit_root_sem);
mutex_unlock(&caching_ctl->mutex);
cond_resched();
- goto again;
+ mutex_lock(&caching_ctl->mutex);
+ down_read(&fs_info->commit_root_sem);
+ goto next;
}
ret = btrfs_next_leaf(extent_root, path);
if (ret < 0)
- goto err;
+ goto out;
if (ret)
break;
leaf = path->nodes[0];
@@ -521,7 +518,7 @@ next:
else
last = key.objectid + key.offset;
- if (total_found > (1024 * 1024 * 2)) {
+ if (total_found > CACHING_CTL_WAKE_UP) {
total_found = 0;
if (wakeup)
wake_up(&caching_ctl->wait);
@@ -534,9 +531,37 @@ next:
total_found += add_new_free_space(block_group, fs_info, last,
block_group->key.objectid +
block_group->key.offset);
+ caching_ctl->progress = (u64)-1;
+
+out:
+ btrfs_free_path(path);
+ return ret;
+}
+
+static noinline void caching_thread(struct btrfs_work *work)
+{
+ struct btrfs_block_group_cache *block_group;
+ struct btrfs_fs_info *fs_info;
+ struct btrfs_caching_control *caching_ctl;
+ struct btrfs_root *extent_root;
+ int ret;
+
+ caching_ctl = container_of(work, struct btrfs_caching_control, work);
+ block_group = caching_ctl->block_group;
+ fs_info = block_group->fs_info;
+ extent_root = fs_info->extent_root;
+
+ mutex_lock(&caching_ctl->mutex);
+ down_read(&fs_info->commit_root_sem);
+
+ if (btrfs_fs_compat_ro(fs_info, FREE_SPACE_TREE))
+ ret = load_free_space_tree(caching_ctl);
+ else
+ ret = load_extent_tree_free(caching_ctl);
+
spin_lock(&block_group->lock);
block_group->caching_ctl = NULL;
- block_group->cached = BTRFS_CACHE_FINISHED;
+ block_group->cached = ret ? BTRFS_CACHE_ERROR : BTRFS_CACHE_FINISHED;
spin_unlock(&block_group->lock);
#ifdef CONFIG_BTRFS_DEBUG
@@ -555,20 +580,11 @@ next:
#endif
caching_ctl->progress = (u64)-1;
-err:
- btrfs_free_path(path);
- up_read(&fs_info->commit_root_sem);
-
- free_excluded_extents(extent_root, block_group);
+ up_read(&fs_info->commit_root_sem);
+ free_excluded_extents(fs_info->extent_root, block_group);
mutex_unlock(&caching_ctl->mutex);
-out:
- if (ret) {
- spin_lock(&block_group->lock);
- block_group->caching_ctl = NULL;
- block_group->cached = BTRFS_CACHE_ERROR;
- spin_unlock(&block_group->lock);
- }
+
wake_up(&caching_ctl->wait);
put_caching_control(caching_ctl);
@@ -680,8 +696,8 @@ static int cache_block_group(struct btrfs_block_group_cache *cache,
}
} else {
/*
- * We are not going to do the fast caching, set cached to the
- * appropriate value and wakeup any waiters.
+ * We're either using the free space tree or no caching at all.
+ * Set cached to the appropriate value and wakeup any waiters.
*/
spin_lock(&cache->lock);
if (load_cache_only) {
@@ -2910,6 +2926,9 @@ int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
if (trans->aborted)
return 0;
+ if (root->fs_info->creating_free_space_tree)
+ return 0;
+
if (root == root->fs_info->extent_root)
root = root->fs_info->tree_root;
@@ -3328,7 +3347,7 @@ static int cache_save_setup(struct btrfs_block_group_cache *block_group,
* If this block group is smaller than 100 megs don't bother caching the
* block group.
*/
- if (block_group->key.offset < (100 * 1024 * 1024)) {
+ if (block_group->key.offset < (100 * SZ_1M)) {
spin_lock(&block_group->lock);
block_group->disk_cache_state = BTRFS_DC_WRITTEN;
spin_unlock(&block_group->lock);
@@ -3428,7 +3447,7 @@ again:
* taking up quite a bit since it's not folded into the other space
* cache.
*/
- num_pages = div_u64(block_group->key.offset, 256 * 1024 * 1024);
+ num_pages = div_u64(block_group->key.offset, SZ_256M);
if (!num_pages)
num_pages = 1;
@@ -3684,11 +3703,21 @@ int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
return -ENOMEM;
/*
- * We don't need the lock here since we are protected by the transaction
- * commit. We want to do the cache_save_setup first and then run the
+ * Even though we are in the critical section of the transaction commit,
+ * we can still have concurrent tasks adding elements to this
+ * transaction's list of dirty block groups. These tasks correspond to
+ * endio free space workers started when writeback finishes for a
+ * space cache, which run inode.c:btrfs_finish_ordered_io(), and can
+ * allocate new block groups as a result of COWing nodes of the root
+ * tree when updating the free space inode. The writeback for the space
+ * caches is triggered by an earlier call to
+ * btrfs_start_dirty_block_groups() and iterations of the following
+ * loop.
+ * Also we want to do the cache_save_setup first and then run the
* delayed refs to make sure we have the best chance at doing this all
* in one shot.
*/
+ spin_lock(&cur_trans->dirty_bgs_lock);
while (!list_empty(&cur_trans->dirty_bgs)) {
cache = list_first_entry(&cur_trans->dirty_bgs,
struct btrfs_block_group_cache,
@@ -3700,11 +3729,13 @@ int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
* finish and then do it all again
*/
if (!list_empty(&cache->io_list)) {
+ spin_unlock(&cur_trans->dirty_bgs_lock);
list_del_init(&cache->io_list);
btrfs_wait_cache_io(root, trans, cache,
&cache->io_ctl, path,
cache->key.objectid);
btrfs_put_block_group(cache);
+ spin_lock(&cur_trans->dirty_bgs_lock);
}
/*
@@ -3712,6 +3743,7 @@ int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
* on any pending IO
*/
list_del_init(&cache->dirty_list);
+ spin_unlock(&cur_trans->dirty_bgs_lock);
should_put = 1;
cache_save_setup(cache, trans, path);
@@ -3736,6 +3768,25 @@ int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
}
if (!ret) {
ret = write_one_cache_group(trans, root, path, cache);
+ /*
+ * One of the free space endio workers might have
+ * created a new block group while updating a free space
+ * cache's inode (at inode.c:btrfs_finish_ordered_io())
+ * and hasn't released its transaction handle yet, in
+ * which case the new block group is still attached to
+ * its transaction handle and its creation has not
+ * finished yet (no block group item in the extent tree
+ * yet, etc). If this is the case, wait for all free
+ * space endio workers to finish and retry. This is a
+ * a very rare case so no need for a more efficient and
+ * complex approach.
+ */
+ if (ret == -ENOENT) {
+ wait_event(cur_trans->writer_wait,
+ atomic_read(&cur_trans->num_writers) == 1);
+ ret = write_one_cache_group(trans, root, path,
+ cache);
+ }
if (ret)
btrfs_abort_transaction(trans, root, ret);
}
@@ -3743,7 +3794,9 @@ int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
/* if its not on the io list, we need to put the block group */
if (should_put)
btrfs_put_block_group(cache);
+ spin_lock(&cur_trans->dirty_bgs_lock);
}
+ spin_unlock(&cur_trans->dirty_bgs_lock);
while (!list_empty(io)) {
cache = list_first_entry(io, struct btrfs_block_group_cache,
@@ -4239,14 +4292,13 @@ static int should_alloc_chunk(struct btrfs_root *root,
*/
if (force == CHUNK_ALLOC_LIMITED) {
thresh = btrfs_super_total_bytes(root->fs_info->super_copy);
- thresh = max_t(u64, 64 * 1024 * 1024,
- div_factor_fine(thresh, 1));
+ thresh = max_t(u64, SZ_64M, div_factor_fine(thresh, 1));
if (num_bytes - num_allocated < thresh)
return 1;
}
- if (num_allocated + 2 * 1024 * 1024 < div_factor(num_bytes, 8))
+ if (num_allocated + SZ_2M < div_factor(num_bytes, 8))
return 0;
return 1;
}
@@ -4446,7 +4498,7 @@ out:
* transaction.
*/
if (trans->can_flush_pending_bgs &&
- trans->chunk_bytes_reserved >= (2 * 1024 * 1024ull)) {
+ trans->chunk_bytes_reserved >= (u64)SZ_2M) {
btrfs_create_pending_block_groups(trans, trans->root);
btrfs_trans_release_chunk_metadata(trans);
}
@@ -4544,7 +4596,7 @@ static inline int calc_reclaim_items_nr(struct btrfs_root *root, u64 to_reclaim)
return nr;
}
-#define EXTENT_SIZE_PER_ITEM (256 * 1024)
+#define EXTENT_SIZE_PER_ITEM SZ_256K
/*
* shrink metadata reservation for delalloc
@@ -4749,8 +4801,7 @@ btrfs_calc_reclaim_metadata_size(struct btrfs_root *root,
u64 expected;
u64 to_reclaim;
- to_reclaim = min_t(u64, num_online_cpus() * 1024 * 1024,
- 16 * 1024 * 1024);
+ to_reclaim = min_t(u64, num_online_cpus() * SZ_1M, SZ_16M);
spin_lock(&space_info->lock);
if (can_overcommit(root, space_info, to_reclaim,
BTRFS_RESERVE_FLUSH_ALL)) {
@@ -4761,8 +4812,7 @@ btrfs_calc_reclaim_metadata_size(struct btrfs_root *root,
used = space_info->bytes_used + space_info->bytes_reserved +
space_info->bytes_pinned + space_info->bytes_readonly +
space_info->bytes_may_use;
- if (can_overcommit(root, space_info, 1024 * 1024,
- BTRFS_RESERVE_FLUSH_ALL))
+ if (can_overcommit(root, space_info, SZ_1M, BTRFS_RESERVE_FLUSH_ALL))
expected = div_factor_fine(space_info->total_bytes, 95);
else
expected = div_factor_fine(space_info->total_bytes, 90);
@@ -5318,7 +5368,7 @@ static void update_global_block_rsv(struct btrfs_fs_info *fs_info)
spin_lock(&sinfo->lock);
spin_lock(&block_rsv->lock);
- block_rsv->size = min_t(u64, num_bytes, 512 * 1024 * 1024);
+ block_rsv->size = min_t(u64, num_bytes, SZ_512M);
num_bytes = sinfo->bytes_used + sinfo->bytes_pinned +
sinfo->bytes_reserved + sinfo->bytes_readonly +
@@ -6222,11 +6272,11 @@ fetch_cluster_info(struct btrfs_root *root, struct btrfs_space_info *space_info,
return ret;
if (ssd)
- *empty_cluster = 2 * 1024 * 1024;
+ *empty_cluster = SZ_2M;
if (space_info->flags & BTRFS_BLOCK_GROUP_METADATA) {
ret = &root->fs_info->meta_alloc_cluster;
if (!ssd)
- *empty_cluster = 64 * 1024;
+ *empty_cluster = SZ_64K;
} else if ((space_info->flags & BTRFS_BLOCK_GROUP_DATA) && ssd) {
ret = &root->fs_info->data_alloc_cluster;
}
@@ -6661,6 +6711,13 @@ static int __btrfs_free_extent(struct btrfs_trans_handle *trans,
}
}
+ ret = add_to_free_space_tree(trans, root->fs_info, bytenr,
+ num_bytes);
+ if (ret) {
+ btrfs_abort_transaction(trans, extent_root, ret);
+ goto out;
+ }
+
ret = update_block_group(trans, root, bytenr, num_bytes, 0);
if (ret) {
btrfs_abort_transaction(trans, extent_root, ret);
@@ -7672,6 +7729,11 @@ static int alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
btrfs_mark_buffer_dirty(path->nodes[0]);
btrfs_free_path(path);
+ ret = remove_from_free_space_tree(trans, fs_info, ins->objectid,
+ ins->offset);
+ if (ret)
+ return ret;
+
ret = update_block_group(trans, root, ins->objectid, ins->offset, 1);
if (ret) { /* -ENOENT, logic error */
btrfs_err(fs_info, "update block group failed for %llu %llu",
@@ -7752,6 +7814,11 @@ static int alloc_reserved_tree_block(struct btrfs_trans_handle *trans,
btrfs_mark_buffer_dirty(leaf);
btrfs_free_path(path);
+ ret = remove_from_free_space_tree(trans, fs_info, ins->objectid,
+ num_bytes);
+ if (ret)
+ return ret;
+
ret = update_block_group(trans, root, ins->objectid, root->nodesize,
1);
if (ret) { /* -ENOENT, logic error */
@@ -7834,7 +7901,7 @@ btrfs_init_new_buffer(struct btrfs_trans_handle *trans, struct btrfs_root *root,
clear_bit(EXTENT_BUFFER_STALE, &buf->bflags);
btrfs_set_lock_blocking(buf);
- btrfs_set_buffer_uptodate(buf);
+ set_extent_buffer_uptodate(buf);
if (root->root_key.objectid == BTRFS_TREE_LOG_OBJECTID) {
buf->log_index = root->log_transid % 2;
@@ -9121,7 +9188,7 @@ static int inc_block_group_ro(struct btrfs_block_group_cache *cache, int force)
if ((sinfo->flags &
(BTRFS_BLOCK_GROUP_SYSTEM | BTRFS_BLOCK_GROUP_METADATA)) &&
!force)
- min_allocable_bytes = 1 * 1024 * 1024;
+ min_allocable_bytes = SZ_1M;
else
min_allocable_bytes = 0;
@@ -9653,6 +9720,8 @@ btrfs_create_block_group_cache(struct btrfs_root *root, u64 start, u64 size)
cache->full_stripe_len = btrfs_full_stripe_len(root,
&root->fs_info->mapping_tree,
start);
+ set_free_space_tree_thresholds(cache);
+
atomic_set(&cache->count, 1);
spin_lock_init(&cache->lock);
init_rwsem(&cache->data_rwsem);
@@ -9664,6 +9733,7 @@ btrfs_create_block_group_cache(struct btrfs_root *root, u64 start, u64 size)
INIT_LIST_HEAD(&cache->io_list);
btrfs_init_free_space_ctl(cache);
atomic_set(&cache->trimming, 0);
+ mutex_init(&cache->free_space_lock);
return cache;
}
@@ -9874,6 +9944,8 @@ void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans,
key.objectid, key.offset);
if (ret)
btrfs_abort_transaction(trans, extent_root, ret);
+ add_block_group_free_space(trans, root->fs_info, block_group);
+ /* already aborted the transaction if it failed. */
next:
list_del_init(&block_group->bg_list);
}
@@ -9904,6 +9976,7 @@ int btrfs_make_block_group(struct btrfs_trans_handle *trans,
cache->flags = type;
cache->last_byte_to_unpin = (u64)-1;
cache->cached = BTRFS_CACHE_FINISHED;
+ cache->needs_free_space = 1;
ret = exclude_super_stripes(root, cache);
if (ret) {
/*
@@ -10274,6 +10347,10 @@ int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
unlock_chunks(root);
+ ret = remove_block_group_free_space(trans, root->fs_info, block_group);
+ if (ret)
+ goto out;
+
btrfs_put_block_group(block_group);
btrfs_put_block_group(block_group);
@@ -10322,7 +10399,7 @@ btrfs_start_trans_remove_block_group(struct btrfs_fs_info *fs_info,
* more device items and remove one chunk item), but this is done at
* btrfs_remove_chunk() through a call to check_system_chunk().
*/
- map = (struct map_lookup *)em->bdev;
+ map = em->map_lookup;
num_items = 3 + map->num_stripes;
free_extent_map(em);
@@ -10509,7 +10586,7 @@ int btrfs_init_space_info(struct btrfs_fs_info *fs_info)
disk_super = fs_info->super_copy;
if (!btrfs_super_root(disk_super))
- return 1;
+ return -EINVAL;
features = btrfs_super_incompat_flags(disk_super);
if (features & BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS)
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index 9abe18763a7f..2e7c97a3f344 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -1285,20 +1285,6 @@ search_again:
}
/* wrappers around set/clear extent bit */
-int set_extent_dirty(struct extent_io_tree *tree, u64 start, u64 end,
- gfp_t mask)
-{
- return set_extent_bit(tree, start, end, EXTENT_DIRTY, NULL,
- NULL, mask);
-}
-
-int set_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
- unsigned bits, gfp_t mask)
-{
- return set_extent_bit(tree, start, end, bits, NULL,
- NULL, mask);
-}
-
int set_record_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
unsigned bits, gfp_t mask,
struct extent_changeset *changeset)
@@ -1323,17 +1309,6 @@ int clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
cached, mask, NULL);
}
-int clear_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
- unsigned bits, gfp_t mask)
-{
- int wake = 0;
-
- if (bits & EXTENT_LOCKED)
- wake = 1;
-
- return clear_extent_bit(tree, start, end, bits, wake, 0, NULL, mask);
-}
-
int clear_record_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
unsigned bits, gfp_t mask,
struct extent_changeset *changeset)
@@ -1348,63 +1323,18 @@ int clear_record_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
changeset);
}
-int set_extent_delalloc(struct extent_io_tree *tree, u64 start, u64 end,
- struct extent_state **cached_state, gfp_t mask)
-{
- return set_extent_bit(tree, start, end,
- EXTENT_DELALLOC | EXTENT_UPTODATE,
- NULL, cached_state, mask);
-}
-
-int set_extent_defrag(struct extent_io_tree *tree, u64 start, u64 end,
- struct extent_state **cached_state, gfp_t mask)
-{
- return set_extent_bit(tree, start, end,
- EXTENT_DELALLOC | EXTENT_UPTODATE | EXTENT_DEFRAG,
- NULL, cached_state, mask);
-}
-
-int clear_extent_dirty(struct extent_io_tree *tree, u64 start, u64 end,
- gfp_t mask)
-{
- return clear_extent_bit(tree, start, end,
- EXTENT_DIRTY | EXTENT_DELALLOC |
- EXTENT_DO_ACCOUNTING, 0, 0, NULL, mask);
-}
-
-int set_extent_new(struct extent_io_tree *tree, u64 start, u64 end,
- gfp_t mask)
-{
- return set_extent_bit(tree, start, end, EXTENT_NEW, NULL,
- NULL, mask);
-}
-
-int set_extent_uptodate(struct extent_io_tree *tree, u64 start, u64 end,
- struct extent_state **cached_state, gfp_t mask)
-{
- return set_extent_bit(tree, start, end, EXTENT_UPTODATE, NULL,
- cached_state, mask);
-}
-
-int clear_extent_uptodate(struct extent_io_tree *tree, u64 start, u64 end,
- struct extent_state **cached_state, gfp_t mask)
-{
- return clear_extent_bit(tree, start, end, EXTENT_UPTODATE, 0, 0,
- cached_state, mask);
-}
-
/*
* either insert or lock state struct between start and end use mask to tell
* us if waiting is desired.
*/
int lock_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
- unsigned bits, struct extent_state **cached_state)
+ struct extent_state **cached_state)
{
int err;
u64 failed_start;
while (1) {
- err = __set_extent_bit(tree, start, end, EXTENT_LOCKED | bits,
+ err = __set_extent_bit(tree, start, end, EXTENT_LOCKED,
EXTENT_LOCKED, &failed_start,
cached_state, GFP_NOFS, NULL);
if (err == -EEXIST) {
@@ -1417,11 +1347,6 @@ int lock_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
return err;
}
-int lock_extent(struct extent_io_tree *tree, u64 start, u64 end)
-{
- return lock_extent_bits(tree, start, end, 0, NULL);
-}
-
int try_lock_extent(struct extent_io_tree *tree, u64 start, u64 end)
{
int err;
@@ -1438,20 +1363,7 @@ int try_lock_extent(struct extent_io_tree *tree, u64 start, u64 end)
return 1;
}
-int unlock_extent_cached(struct extent_io_tree *tree, u64 start, u64 end,
- struct extent_state **cached, gfp_t mask)
-{
- return clear_extent_bit(tree, start, end, EXTENT_LOCKED, 1, 0, cached,
- mask);
-}
-
-int unlock_extent(struct extent_io_tree *tree, u64 start, u64 end)
-{
- return clear_extent_bit(tree, start, end, EXTENT_LOCKED, 1, 0, NULL,
- GFP_NOFS);
-}
-
-int extent_range_clear_dirty_for_io(struct inode *inode, u64 start, u64 end)
+void extent_range_clear_dirty_for_io(struct inode *inode, u64 start, u64 end)
{
unsigned long index = start >> PAGE_CACHE_SHIFT;
unsigned long end_index = end >> PAGE_CACHE_SHIFT;
@@ -1464,10 +1376,9 @@ int extent_range_clear_dirty_for_io(struct inode *inode, u64 start, u64 end)
page_cache_release(page);
index++;
}
- return 0;
}
-int extent_range_redirty_for_io(struct inode *inode, u64 start, u64 end)
+void extent_range_redirty_for_io(struct inode *inode, u64 start, u64 end)
{
unsigned long index = start >> PAGE_CACHE_SHIFT;
unsigned long end_index = end >> PAGE_CACHE_SHIFT;
@@ -1481,13 +1392,12 @@ int extent_range_redirty_for_io(struct inode *inode, u64 start, u64 end)
page_cache_release(page);
index++;
}
- return 0;
}
/*
* helper function to set both pages and extents in the tree writeback
*/
-static int set_range_writeback(struct extent_io_tree *tree, u64 start, u64 end)
+static void set_range_writeback(struct extent_io_tree *tree, u64 start, u64 end)
{
unsigned long index = start >> PAGE_CACHE_SHIFT;
unsigned long end_index = end >> PAGE_CACHE_SHIFT;
@@ -1500,7 +1410,6 @@ static int set_range_writeback(struct extent_io_tree *tree, u64 start, u64 end)
page_cache_release(page);
index++;
}
- return 0;
}
/* find the first state struct with 'bits' set after 'start', and
@@ -1800,7 +1709,7 @@ again:
BUG_ON(ret); /* Only valid values are 0 and -EAGAIN */
/* step three, lock the state bits for the whole range */
- lock_extent_bits(tree, delalloc_start, delalloc_end, 0, &cached_state);
+ lock_extent_bits(tree, delalloc_start, delalloc_end, &cached_state);
/* then test to make sure it is all still delalloc */
ret = test_range_bit(tree, delalloc_start, delalloc_end,
@@ -1820,7 +1729,7 @@ out_failed:
return found;
}
-int extent_clear_unlock_delalloc(struct inode *inode, u64 start, u64 end,
+void extent_clear_unlock_delalloc(struct inode *inode, u64 start, u64 end,
struct page *locked_page,
unsigned clear_bits,
unsigned long page_ops)
@@ -1835,7 +1744,7 @@ int extent_clear_unlock_delalloc(struct inode *inode, u64 start, u64 end,
clear_extent_bit(tree, start, end, clear_bits, 1, 0, NULL, GFP_NOFS);
if (page_ops == 0)
- return 0;
+ return;
if ((page_ops & PAGE_SET_ERROR) && nr_pages > 0)
mapping_set_error(inode->i_mapping, -EIO);
@@ -1869,7 +1778,6 @@ int extent_clear_unlock_delalloc(struct inode *inode, u64 start, u64 end,
index += ret;
cond_resched();
}
- return 0;
}
/*
@@ -2516,7 +2424,7 @@ static int bio_readpage_error(struct bio *failed_bio, u64 phy_offset,
/* lots and lots of room for performance fixes in the end_bio funcs */
-int end_extent_writepage(struct page *page, int err, u64 start, u64 end)
+void end_extent_writepage(struct page *page, int err, u64 start, u64 end)
{
int uptodate = (err == 0);
struct extent_io_tree *tree;
@@ -2537,7 +2445,6 @@ int end_extent_writepage(struct page *page, int err, u64 start, u64 end)
ret = ret < 0 ? ret : -EIO;
mapping_set_error(page->mapping, ret);
}
- return 0;
}
/*
@@ -2579,9 +2486,7 @@ static void end_bio_extent_writepage(struct bio *bio)
start = page_offset(page);
end = start + bvec->bv_offset + bvec->bv_len - 1;
- if (end_extent_writepage(page, bio->bi_error, start, end))
- continue;
-
+ end_extent_writepage(page, bio->bi_error, start, end);
end_page_writeback(page);
}
@@ -4326,7 +4231,7 @@ int extent_invalidatepage(struct extent_io_tree *tree,
if (start > end)
return 0;
- lock_extent_bits(tree, start, end, 0, &cached_state);
+ lock_extent_bits(tree, start, end, &cached_state);
wait_on_page_writeback(page);
clear_extent_bit(tree, start, end,
EXTENT_LOCKED | EXTENT_DIRTY | EXTENT_DELALLOC |
@@ -4387,7 +4292,7 @@ int try_release_extent_mapping(struct extent_map_tree *map,
u64 end = start + PAGE_CACHE_SIZE - 1;
if (gfpflags_allow_blocking(mask) &&
- page->mapping->host->i_size > 16 * 1024 * 1024) {
+ page->mapping->host->i_size > SZ_16M) {
u64 len;
while (start <= end) {
len = end - start + 1;
@@ -4536,7 +4441,7 @@ int extent_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
last_for_get_extent = isize;
}
- lock_extent_bits(&BTRFS_I(inode)->io_tree, start, start + len - 1, 0,
+ lock_extent_bits(&BTRFS_I(inode)->io_tree, start, start + len - 1,
&cached_state);
em = get_extent_skip_holes(inode, start, last_for_get_extent,
@@ -4797,24 +4702,14 @@ struct extent_buffer *btrfs_clone_extent_buffer(struct extent_buffer *src)
return new;
}
-struct extent_buffer *alloc_dummy_extent_buffer(struct btrfs_fs_info *fs_info,
- u64 start)
+struct extent_buffer *__alloc_dummy_extent_buffer(struct btrfs_fs_info *fs_info,
+ u64 start, unsigned long len)
{
struct extent_buffer *eb;
- unsigned long len;
unsigned long num_pages;
unsigned long i;
- if (!fs_info) {
- /*
- * Called only from tests that don't always have a fs_info
- * available, but we know that nodesize is 4096
- */
- len = 4096;
- } else {
- len = fs_info->tree_root->nodesize;
- }
- num_pages = num_extent_pages(0, len);
+ num_pages = num_extent_pages(start, len);
eb = __alloc_extent_buffer(fs_info, start, len);
if (!eb)
@@ -4837,6 +4732,24 @@ err:
return NULL;
}
+struct extent_buffer *alloc_dummy_extent_buffer(struct btrfs_fs_info *fs_info,
+ u64 start)
+{
+ unsigned long len;
+
+ if (!fs_info) {
+ /*
+ * Called only from tests that don't always have a fs_info
+ * available, but we know that nodesize is 4096
+ */
+ len = 4096;
+ } else {
+ len = fs_info->tree_root->nodesize;
+ }
+
+ return __alloc_dummy_extent_buffer(fs_info, start, len);
+}
+
static void check_buffer_tree_ref(struct extent_buffer *eb)
{
int refs;
@@ -5227,7 +5140,7 @@ int set_extent_buffer_dirty(struct extent_buffer *eb)
return was_dirty;
}
-int clear_extent_buffer_uptodate(struct extent_buffer *eb)
+void clear_extent_buffer_uptodate(struct extent_buffer *eb)
{
unsigned long i;
struct page *page;
@@ -5240,10 +5153,9 @@ int clear_extent_buffer_uptodate(struct extent_buffer *eb)
if (page)
ClearPageUptodate(page);
}
- return 0;
}
-int set_extent_buffer_uptodate(struct extent_buffer *eb)
+void set_extent_buffer_uptodate(struct extent_buffer *eb)
{
unsigned long i;
struct page *page;
@@ -5255,7 +5167,6 @@ int set_extent_buffer_uptodate(struct extent_buffer *eb)
page = eb->pages[i];
SetPageUptodate(page);
}
- return 0;
}
int extent_buffer_uptodate(struct extent_buffer *eb)
@@ -5594,6 +5505,155 @@ void copy_extent_buffer(struct extent_buffer *dst, struct extent_buffer *src,
}
}
+/*
+ * The extent buffer bitmap operations are done with byte granularity because
+ * bitmap items are not guaranteed to be aligned to a word and therefore a
+ * single word in a bitmap may straddle two pages in the extent buffer.
+ */
+#define BIT_BYTE(nr) ((nr) / BITS_PER_BYTE)
+#define BYTE_MASK ((1 << BITS_PER_BYTE) - 1)
+#define BITMAP_FIRST_BYTE_MASK(start) \
+ ((BYTE_MASK << ((start) & (BITS_PER_BYTE - 1))) & BYTE_MASK)
+#define BITMAP_LAST_BYTE_MASK(nbits) \
+ (BYTE_MASK >> (-(nbits) & (BITS_PER_BYTE - 1)))
+
+/*
+ * eb_bitmap_offset() - calculate the page and offset of the byte containing the
+ * given bit number
+ * @eb: the extent buffer
+ * @start: offset of the bitmap item in the extent buffer
+ * @nr: bit number
+ * @page_index: return index of the page in the extent buffer that contains the
+ * given bit number
+ * @page_offset: return offset into the page given by page_index
+ *
+ * This helper hides the ugliness of finding the byte in an extent buffer which
+ * contains a given bit.
+ */
+static inline void eb_bitmap_offset(struct extent_buffer *eb,
+ unsigned long start, unsigned long nr,
+ unsigned long *page_index,
+ size_t *page_offset)
+{
+ size_t start_offset = eb->start & ((u64)PAGE_CACHE_SIZE - 1);
+ size_t byte_offset = BIT_BYTE(nr);
+ size_t offset;
+
+ /*
+ * The byte we want is the offset of the extent buffer + the offset of
+ * the bitmap item in the extent buffer + the offset of the byte in the
+ * bitmap item.
+ */
+ offset = start_offset + start + byte_offset;
+
+ *page_index = offset >> PAGE_CACHE_SHIFT;
+ *page_offset = offset & (PAGE_CACHE_SIZE - 1);
+}
+
+/**
+ * extent_buffer_test_bit - determine whether a bit in a bitmap item is set
+ * @eb: the extent buffer
+ * @start: offset of the bitmap item in the extent buffer
+ * @nr: bit number to test
+ */
+int extent_buffer_test_bit(struct extent_buffer *eb, unsigned long start,
+ unsigned long nr)
+{
+ char *kaddr;
+ struct page *page;
+ unsigned long i;
+ size_t offset;
+
+ eb_bitmap_offset(eb, start, nr, &i, &offset);
+ page = eb->pages[i];
+ WARN_ON(!PageUptodate(page));
+ kaddr = page_address(page);
+ return 1U & (kaddr[offset] >> (nr & (BITS_PER_BYTE - 1)));
+}
+
+/**
+ * extent_buffer_bitmap_set - set an area of a bitmap
+ * @eb: the extent buffer
+ * @start: offset of the bitmap item in the extent buffer
+ * @pos: bit number of the first bit
+ * @len: number of bits to set
+ */
+void extent_buffer_bitmap_set(struct extent_buffer *eb, unsigned long start,
+ unsigned long pos, unsigned long len)
+{
+ char *kaddr;
+ struct page *page;
+ unsigned long i;
+ size_t offset;
+ const unsigned int size = pos + len;
+ int bits_to_set = BITS_PER_BYTE - (pos % BITS_PER_BYTE);
+ unsigned int mask_to_set = BITMAP_FIRST_BYTE_MASK(pos);
+
+ eb_bitmap_offset(eb, start, pos, &i, &offset);
+ page = eb->pages[i];
+ WARN_ON(!PageUptodate(page));
+ kaddr = page_address(page);
+
+ while (len >= bits_to_set) {
+ kaddr[offset] |= mask_to_set;
+ len -= bits_to_set;
+ bits_to_set = BITS_PER_BYTE;
+ mask_to_set = ~0U;
+ if (++offset >= PAGE_CACHE_SIZE && len > 0) {
+ offset = 0;
+ page = eb->pages[++i];
+ WARN_ON(!PageUptodate(page));
+ kaddr = page_address(page);
+ }
+ }
+ if (len) {
+ mask_to_set &= BITMAP_LAST_BYTE_MASK(size);
+ kaddr[offset] |= mask_to_set;
+ }
+}
+
+
+/**
+ * extent_buffer_bitmap_clear - clear an area of a bitmap
+ * @eb: the extent buffer
+ * @start: offset of the bitmap item in the extent buffer
+ * @pos: bit number of the first bit
+ * @len: number of bits to clear
+ */
+void extent_buffer_bitmap_clear(struct extent_buffer *eb, unsigned long start,
+ unsigned long pos, unsigned long len)
+{
+ char *kaddr;
+ struct page *page;
+ unsigned long i;
+ size_t offset;
+ const unsigned int size = pos + len;
+ int bits_to_clear = BITS_PER_BYTE - (pos % BITS_PER_BYTE);
+ unsigned int mask_to_clear = BITMAP_FIRST_BYTE_MASK(pos);
+
+ eb_bitmap_offset(eb, start, pos, &i, &offset);
+ page = eb->pages[i];
+ WARN_ON(!PageUptodate(page));
+ kaddr = page_address(page);
+
+ while (len >= bits_to_clear) {
+ kaddr[offset] &= ~mask_to_clear;
+ len -= bits_to_clear;
+ bits_to_clear = BITS_PER_BYTE;
+ mask_to_clear = ~0U;
+ if (++offset >= PAGE_CACHE_SIZE && len > 0) {
+ offset = 0;
+ page = eb->pages[++i];
+ WARN_ON(!PageUptodate(page));
+ kaddr = page_address(page);
+ }
+ }
+ if (len) {
+ mask_to_clear &= BITMAP_LAST_BYTE_MASK(size);
+ kaddr[offset] &= ~mask_to_clear;
+ }
+}
+
static inline bool areas_overlap(unsigned long src, unsigned long dst, unsigned long len)
{
unsigned long distance = (src > dst) ? src - dst : dst - src;
diff --git a/fs/btrfs/extent_io.h b/fs/btrfs/extent_io.h
index f4c1ae11855f..0377413bd4b9 100644
--- a/fs/btrfs/extent_io.h
+++ b/fs/btrfs/extent_io.h
@@ -199,12 +199,14 @@ int try_release_extent_mapping(struct extent_map_tree *map,
struct extent_io_tree *tree, struct page *page,
gfp_t mask);
int try_release_extent_buffer(struct page *page);
-int lock_extent(struct extent_io_tree *tree, u64 start, u64 end);
int lock_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
- unsigned bits, struct extent_state **cached);
-int unlock_extent(struct extent_io_tree *tree, u64 start, u64 end);
-int unlock_extent_cached(struct extent_io_tree *tree, u64 start, u64 end,
- struct extent_state **cached, gfp_t mask);
+ struct extent_state **cached);
+
+static inline int lock_extent(struct extent_io_tree *tree, u64 start, u64 end)
+{
+ return lock_extent_bits(tree, start, end, NULL);
+}
+
int try_lock_extent(struct extent_io_tree *tree, u64 start, u64 end);
int extent_read_full_page(struct extent_io_tree *tree, struct page *page,
get_extent_t *get_extent, int mirror_num);
@@ -221,39 +223,105 @@ void free_extent_state(struct extent_state *state);
int test_range_bit(struct extent_io_tree *tree, u64 start, u64 end,
unsigned bits, int filled,
struct extent_state *cached_state);
-int clear_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
- unsigned bits, gfp_t mask);
int clear_record_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
unsigned bits, gfp_t mask,
struct extent_changeset *changeset);
int clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
unsigned bits, int wake, int delete,
struct extent_state **cached, gfp_t mask);
-int set_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
- unsigned bits, gfp_t mask);
+
+static inline int unlock_extent(struct extent_io_tree *tree, u64 start, u64 end)
+{
+ return clear_extent_bit(tree, start, end, EXTENT_LOCKED, 1, 0, NULL,
+ GFP_NOFS);
+}
+
+static inline int unlock_extent_cached(struct extent_io_tree *tree, u64 start,
+ u64 end, struct extent_state **cached, gfp_t mask)
+{
+ return clear_extent_bit(tree, start, end, EXTENT_LOCKED, 1, 0, cached,
+ mask);
+}
+
+static inline int clear_extent_bits(struct extent_io_tree *tree, u64 start,
+ u64 end, unsigned bits, gfp_t mask)
+{
+ int wake = 0;
+
+ if (bits & EXTENT_LOCKED)
+ wake = 1;
+
+ return clear_extent_bit(tree, start, end, bits, wake, 0, NULL, mask);
+}
+
int set_record_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
unsigned bits, gfp_t mask,
struct extent_changeset *changeset);
int set_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
unsigned bits, u64 *failed_start,
struct extent_state **cached_state, gfp_t mask);
-int set_extent_uptodate(struct extent_io_tree *tree, u64 start, u64 end,
- struct extent_state **cached_state, gfp_t mask);
-int clear_extent_uptodate(struct extent_io_tree *tree, u64 start, u64 end,
- struct extent_state **cached_state, gfp_t mask);
-int set_extent_new(struct extent_io_tree *tree, u64 start, u64 end,
- gfp_t mask);
-int set_extent_dirty(struct extent_io_tree *tree, u64 start, u64 end,
- gfp_t mask);
-int clear_extent_dirty(struct extent_io_tree *tree, u64 start, u64 end,
- gfp_t mask);
+
+static inline int set_extent_bits(struct extent_io_tree *tree, u64 start,
+ u64 end, unsigned bits, gfp_t mask)
+{
+ return set_extent_bit(tree, start, end, bits, NULL, NULL, mask);
+}
+
+static inline int clear_extent_uptodate(struct extent_io_tree *tree, u64 start,
+ u64 end, struct extent_state **cached_state, gfp_t mask)
+{
+ return clear_extent_bit(tree, start, end, EXTENT_UPTODATE, 0, 0,
+ cached_state, mask);
+}
+
+static inline int set_extent_dirty(struct extent_io_tree *tree, u64 start,
+ u64 end, gfp_t mask)
+{
+ return set_extent_bit(tree, start, end, EXTENT_DIRTY, NULL,
+ NULL, mask);
+}
+
+static inline int clear_extent_dirty(struct extent_io_tree *tree, u64 start,
+ u64 end, gfp_t mask)
+{
+ return clear_extent_bit(tree, start, end,
+ EXTENT_DIRTY | EXTENT_DELALLOC |
+ EXTENT_DO_ACCOUNTING, 0, 0, NULL, mask);
+}
+
int convert_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
unsigned bits, unsigned clear_bits,
struct extent_state **cached_state, gfp_t mask);
-int set_extent_delalloc(struct extent_io_tree *tree, u64 start, u64 end,
- struct extent_state **cached_state, gfp_t mask);
-int set_extent_defrag(struct extent_io_tree *tree, u64 start, u64 end,
- struct extent_state **cached_state, gfp_t mask);
+
+static inline int set_extent_delalloc(struct extent_io_tree *tree, u64 start,
+ u64 end, struct extent_state **cached_state, gfp_t mask)
+{
+ return set_extent_bit(tree, start, end,
+ EXTENT_DELALLOC | EXTENT_UPTODATE,
+ NULL, cached_state, mask);
+}
+
+static inline int set_extent_defrag(struct extent_io_tree *tree, u64 start,
+ u64 end, struct extent_state **cached_state, gfp_t mask)
+{
+ return set_extent_bit(tree, start, end,
+ EXTENT_DELALLOC | EXTENT_UPTODATE | EXTENT_DEFRAG,
+ NULL, cached_state, mask);
+}
+
+static inline int set_extent_new(struct extent_io_tree *tree, u64 start,
+ u64 end, gfp_t mask)
+{
+ return set_extent_bit(tree, start, end, EXTENT_NEW, NULL, NULL, mask);
+}
+
+static inline int set_extent_uptodate(struct extent_io_tree *tree, u64 start,
+ u64 end, struct extent_state **cached_state, gfp_t mask)
+{
+ return set_extent_bit(tree, start, end, EXTENT_UPTODATE, NULL,
+ cached_state, mask);
+}
+
int find_first_extent_bit(struct extent_io_tree *tree, u64 start,
u64 *start_ret, u64 *end_ret, unsigned bits,
struct extent_state **cached_state);
@@ -282,8 +350,10 @@ void set_page_extent_mapped(struct page *page);
struct extent_buffer *alloc_extent_buffer(struct btrfs_fs_info *fs_info,
u64 start);
+struct extent_buffer *__alloc_dummy_extent_buffer(struct btrfs_fs_info *fs_info,
+ u64 start, unsigned long len);
struct extent_buffer *alloc_dummy_extent_buffer(struct btrfs_fs_info *fs_info,
- u64 start);
+ u64 start);
struct extent_buffer *btrfs_clone_extent_buffer(struct extent_buffer *src);
struct extent_buffer *find_extent_buffer(struct btrfs_fs_info *fs_info,
u64 start);
@@ -328,19 +398,25 @@ void memmove_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset,
unsigned long src_offset, unsigned long len);
void memset_extent_buffer(struct extent_buffer *eb, char c,
unsigned long start, unsigned long len);
+int extent_buffer_test_bit(struct extent_buffer *eb, unsigned long start,
+ unsigned long pos);
+void extent_buffer_bitmap_set(struct extent_buffer *eb, unsigned long start,
+ unsigned long pos, unsigned long len);
+void extent_buffer_bitmap_clear(struct extent_buffer *eb, unsigned long start,
+ unsigned long pos, unsigned long len);
void clear_extent_buffer_dirty(struct extent_buffer *eb);
int set_extent_buffer_dirty(struct extent_buffer *eb);
-int set_extent_buffer_uptodate(struct extent_buffer *eb);
-int clear_extent_buffer_uptodate(struct extent_buffer *eb);
+void set_extent_buffer_uptodate(struct extent_buffer *eb);
+void clear_extent_buffer_uptodate(struct extent_buffer *eb);
int extent_buffer_uptodate(struct extent_buffer *eb);
int extent_buffer_under_io(struct extent_buffer *eb);
int map_private_extent_buffer(struct extent_buffer *eb, unsigned long offset,
unsigned long min_len, char **map,
unsigned long *map_start,
unsigned long *map_len);
-int extent_range_clear_dirty_for_io(struct inode *inode, u64 start, u64 end);
-int extent_range_redirty_for_io(struct inode *inode, u64 start, u64 end);
-int extent_clear_unlock_delalloc(struct inode *inode, u64 start, u64 end,
+void extent_range_clear_dirty_for_io(struct inode *inode, u64 start, u64 end);
+void extent_range_redirty_for_io(struct inode *inode, u64 start, u64 end);
+void extent_clear_unlock_delalloc(struct inode *inode, u64 start, u64 end,
struct page *locked_page,
unsigned bits_to_clear,
unsigned long page_ops);
@@ -357,7 +433,7 @@ int repair_io_failure(struct inode *inode, u64 start, u64 length, u64 logical,
int mirror_num);
int clean_io_failure(struct inode *inode, u64 start, struct page *page,
unsigned int pg_offset);
-int end_extent_writepage(struct page *page, int err, u64 start, u64 end);
+void end_extent_writepage(struct page *page, int err, u64 start, u64 end);
int repair_eb_io_failure(struct btrfs_root *root, struct extent_buffer *eb,
int mirror_num);
diff --git a/fs/btrfs/extent_map.c b/fs/btrfs/extent_map.c
index 6a98bddd8f33..84fb56d5c018 100644
--- a/fs/btrfs/extent_map.c
+++ b/fs/btrfs/extent_map.c
@@ -76,7 +76,7 @@ void free_extent_map(struct extent_map *em)
WARN_ON(extent_map_in_tree(em));
WARN_ON(!list_empty(&em->list));
if (test_bit(EXTENT_FLAG_FS_MAPPING, &em->flags))
- kfree(em->bdev);
+ kfree(em->map_lookup);
kmem_cache_free(extent_map_cache, em);
}
}
diff --git a/fs/btrfs/extent_map.h b/fs/btrfs/extent_map.h
index b2991fd8583e..eb8b8fae036b 100644
--- a/fs/btrfs/extent_map.h
+++ b/fs/btrfs/extent_map.h
@@ -32,7 +32,15 @@ struct extent_map {
u64 block_len;
u64 generation;
unsigned long flags;
- struct block_device *bdev;
+ union {
+ struct block_device *bdev;
+
+ /*
+ * used for chunk mappings
+ * flags & EXTENT_FLAG_FS_MAPPING must be set
+ */
+ struct map_lookup *map_lookup;
+ };
atomic_t refs;
unsigned int compress_type;
struct list_head list;
diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index 0f09526aa7d9..364e0f1f61f6 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -1394,7 +1394,7 @@ lock_and_cleanup_extent_if_need(struct inode *inode, struct page **pages,
if (start_pos < inode->i_size) {
struct btrfs_ordered_extent *ordered;
lock_extent_bits(&BTRFS_I(inode)->io_tree,
- start_pos, last_pos, 0, cached_state);
+ start_pos, last_pos, cached_state);
ordered = btrfs_lookup_ordered_range(inode, start_pos,
last_pos - start_pos + 1);
if (ordered &&
@@ -2398,7 +2398,7 @@ static int btrfs_punch_hole(struct inode *inode, loff_t offset, loff_t len)
truncate_pagecache_range(inode, lockstart, lockend);
lock_extent_bits(&BTRFS_I(inode)->io_tree, lockstart, lockend,
- 0, &cached_state);
+ &cached_state);
ordered = btrfs_lookup_first_ordered_extent(inode, lockend);
/*
@@ -2705,7 +2705,7 @@ static long btrfs_fallocate(struct file *file, int mode,
* transaction
*/
lock_extent_bits(&BTRFS_I(inode)->io_tree, alloc_start,
- locked_end, 0, &cached_state);
+ locked_end, &cached_state);
ordered = btrfs_lookup_first_ordered_extent(inode,
alloc_end - 1);
if (ordered &&
@@ -2852,7 +2852,7 @@ static int find_desired_extent(struct inode *inode, loff_t *offset, int whence)
lockend--;
len = lockend - lockstart + 1;
- lock_extent_bits(&BTRFS_I(inode)->io_tree, lockstart, lockend, 0,
+ lock_extent_bits(&BTRFS_I(inode)->io_tree, lockstart, lockend,
&cached_state);
while (start < inode->i_size) {
diff --git a/fs/btrfs/free-space-cache.c b/fs/btrfs/free-space-cache.c
index ed8a3b7d3565..8f835bfa1bdd 100644
--- a/fs/btrfs/free-space-cache.c
+++ b/fs/btrfs/free-space-cache.c
@@ -30,7 +30,7 @@
#include "volumes.h"
#define BITS_PER_BITMAP (PAGE_CACHE_SIZE * 8)
-#define MAX_CACHE_BYTES_PER_GIG (32 * 1024)
+#define MAX_CACHE_BYTES_PER_GIG SZ_32K
struct btrfs_trim_range {
u64 start;
@@ -1086,14 +1086,11 @@ write_pinned_extent_entries(struct btrfs_root *root,
static noinline_for_stack int
write_bitmap_entries(struct btrfs_io_ctl *io_ctl, struct list_head *bitmap_list)
{
- struct list_head *pos, *n;
+ struct btrfs_free_space *entry, *next;
int ret;
/* Write out the bitmaps */
- list_for_each_safe(pos, n, bitmap_list) {
- struct btrfs_free_space *entry =
- list_entry(pos, struct btrfs_free_space, list);
-
+ list_for_each_entry_safe(entry, next, bitmap_list, list) {
ret = io_ctl_add_bitmap(io_ctl, entry->bitmap);
if (ret)
return -ENOSPC;
@@ -1119,13 +1116,10 @@ static int flush_dirty_cache(struct inode *inode)
static void noinline_for_stack
cleanup_bitmap_list(struct list_head *bitmap_list)
{
- struct list_head *pos, *n;
+ struct btrfs_free_space *entry, *next;
- list_for_each_safe(pos, n, bitmap_list) {
- struct btrfs_free_space *entry =
- list_entry(pos, struct btrfs_free_space, list);
+ list_for_each_entry_safe(entry, next, bitmap_list, list)
list_del_init(&entry->list);
- }
}
static void noinline_for_stack
@@ -1261,7 +1255,7 @@ static int __btrfs_write_out_cache(struct btrfs_root *root, struct inode *inode,
goto out;
lock_extent_bits(&BTRFS_I(inode)->io_tree, 0, i_size_read(inode) - 1,
- 0, &cached_state);
+ &cached_state);
io_ctl_set_generation(io_ctl, trans->transid);
@@ -1656,11 +1650,10 @@ static void recalculate_thresholds(struct btrfs_free_space_ctl *ctl)
* at or below 32k, so we need to adjust how much memory we allow to be
* used by extent based free space tracking
*/
- if (size < 1024 * 1024 * 1024)
+ if (size < SZ_1G)
max_bytes = MAX_CACHE_BYTES_PER_GIG;
else
- max_bytes = MAX_CACHE_BYTES_PER_GIG *
- div_u64(size, 1024 * 1024 * 1024);
+ max_bytes = MAX_CACHE_BYTES_PER_GIG * div_u64(size, SZ_1G);
/*
* we want to account for 1 more bitmap than what we have so we can make
@@ -2489,8 +2482,7 @@ void btrfs_init_free_space_ctl(struct btrfs_block_group_cache *block_group)
* track of free space, and if we pass 1/2 of that we want to
* start converting things over to using bitmaps
*/
- ctl->extents_thresh = ((1024 * 32) / 2) /
- sizeof(struct btrfs_free_space);
+ ctl->extents_thresh = (SZ_32K / 2) / sizeof(struct btrfs_free_space);
}
/*
diff --git a/fs/btrfs/free-space-tree.c b/fs/btrfs/free-space-tree.c
new file mode 100644
index 000000000000..393e36bd5845
--- /dev/null
+++ b/fs/btrfs/free-space-tree.c
@@ -0,0 +1,1591 @@
+/*
+ * Copyright (C) 2015 Facebook. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public
+ * License v2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public
+ * License along with this program; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 021110-1307, USA.
+ */
+
+#include <linux/kernel.h>
+#include <linux/vmalloc.h>
+#include "ctree.h"
+#include "disk-io.h"
+#include "locking.h"
+#include "free-space-tree.h"
+#include "transaction.h"
+
+static int __add_block_group_free_space(struct btrfs_trans_handle *trans,
+ struct btrfs_fs_info *fs_info,
+ struct btrfs_block_group_cache *block_group,
+ struct btrfs_path *path);
+
+void set_free_space_tree_thresholds(struct btrfs_block_group_cache *cache)
+{
+ u32 bitmap_range;
+ size_t bitmap_size;
+ u64 num_bitmaps, total_bitmap_size;
+
+ /*
+ * We convert to bitmaps when the disk space required for using extents
+ * exceeds that required for using bitmaps.
+ */
+ bitmap_range = cache->sectorsize * BTRFS_FREE_SPACE_BITMAP_BITS;
+ num_bitmaps = div_u64(cache->key.offset + bitmap_range - 1,
+ bitmap_range);
+ bitmap_size = sizeof(struct btrfs_item) + BTRFS_FREE_SPACE_BITMAP_SIZE;
+ total_bitmap_size = num_bitmaps * bitmap_size;
+ cache->bitmap_high_thresh = div_u64(total_bitmap_size,
+ sizeof(struct btrfs_item));
+
+ /*
+ * We allow for a small buffer between the high threshold and low
+ * threshold to avoid thrashing back and forth between the two formats.
+ */
+ if (cache->bitmap_high_thresh > 100)
+ cache->bitmap_low_thresh = cache->bitmap_high_thresh - 100;
+ else
+ cache->bitmap_low_thresh = 0;
+}
+
+static int add_new_free_space_info(struct btrfs_trans_handle *trans,
+ struct btrfs_fs_info *fs_info,
+ struct btrfs_block_group_cache *block_group,
+ struct btrfs_path *path)
+{
+ struct btrfs_root *root = fs_info->free_space_root;
+ struct btrfs_free_space_info *info;
+ struct btrfs_key key;
+ struct extent_buffer *leaf;
+ int ret;
+
+ key.objectid = block_group->key.objectid;
+ key.type = BTRFS_FREE_SPACE_INFO_KEY;
+ key.offset = block_group->key.offset;
+
+ ret = btrfs_insert_empty_item(trans, root, path, &key, sizeof(*info));
+ if (ret)
+ goto out;
+
+ leaf = path->nodes[0];
+ info = btrfs_item_ptr(leaf, path->slots[0],
+ struct btrfs_free_space_info);
+ btrfs_set_free_space_extent_count(leaf, info, 0);
+ btrfs_set_free_space_flags(leaf, info, 0);
+ btrfs_mark_buffer_dirty(leaf);
+
+ ret = 0;
+out:
+ btrfs_release_path(path);
+ return ret;
+}
+
+struct btrfs_free_space_info *
+search_free_space_info(struct btrfs_trans_handle *trans,
+ struct btrfs_fs_info *fs_info,
+ struct btrfs_block_group_cache *block_group,
+ struct btrfs_path *path, int cow)
+{
+ struct btrfs_root *root = fs_info->free_space_root;
+ struct btrfs_key key;
+ int ret;
+
+ key.objectid = block_group->key.objectid;
+ key.type = BTRFS_FREE_SPACE_INFO_KEY;
+ key.offset = block_group->key.offset;
+
+ ret = btrfs_search_slot(trans, root, &key, path, 0, cow);
+ if (ret < 0)
+ return ERR_PTR(ret);
+ if (ret != 0) {
+ btrfs_warn(fs_info, "missing free space info for %llu\n",
+ block_group->key.objectid);
+ ASSERT(0);
+ return ERR_PTR(-ENOENT);
+ }
+
+ return btrfs_item_ptr(path->nodes[0], path->slots[0],
+ struct btrfs_free_space_info);
+}
+
+/*
+ * btrfs_search_slot() but we're looking for the greatest key less than the
+ * passed key.
+ */
+static int btrfs_search_prev_slot(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root,
+ struct btrfs_key *key, struct btrfs_path *p,
+ int ins_len, int cow)
+{
+ int ret;
+
+ ret = btrfs_search_slot(trans, root, key, p, ins_len, cow);
+ if (ret < 0)
+ return ret;
+
+ if (ret == 0) {
+ ASSERT(0);
+ return -EIO;
+ }
+
+ if (p->slots[0] == 0) {
+ ASSERT(0);
+ return -EIO;
+ }
+ p->slots[0]--;
+
+ return 0;
+}
+
+static inline u32 free_space_bitmap_size(u64 size, u32 sectorsize)
+{
+ return DIV_ROUND_UP((u32)div_u64(size, sectorsize), BITS_PER_BYTE);
+}
+
+static unsigned long *alloc_bitmap(u32 bitmap_size)
+{
+ return __vmalloc(bitmap_size, GFP_NOFS | __GFP_HIGHMEM | __GFP_ZERO,
+ PAGE_KERNEL);
+}
+
+int convert_free_space_to_bitmaps(struct btrfs_trans_handle *trans,
+ struct btrfs_fs_info *fs_info,
+ struct btrfs_block_group_cache *block_group,
+ struct btrfs_path *path)
+{
+ struct btrfs_root *root = fs_info->free_space_root;
+ struct btrfs_free_space_info *info;
+ struct btrfs_key key, found_key;
+ struct extent_buffer *leaf;
+ unsigned long *bitmap;
+ char *bitmap_cursor;
+ u64 start, end;
+ u64 bitmap_range, i;
+ u32 bitmap_size, flags, expected_extent_count;
+ u32 extent_count = 0;
+ int done = 0, nr;
+ int ret;
+
+ bitmap_size = free_space_bitmap_size(block_group->key.offset,
+ block_group->sectorsize);
+ bitmap = alloc_bitmap(bitmap_size);
+ if (!bitmap) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ start = block_group->key.objectid;
+ end = block_group->key.objectid + block_group->key.offset;
+
+ key.objectid = end - 1;
+ key.type = (u8)-1;
+ key.offset = (u64)-1;
+
+ while (!done) {
+ ret = btrfs_search_prev_slot(trans, root, &key, path, -1, 1);
+ if (ret)
+ goto out;
+
+ leaf = path->nodes[0];
+ nr = 0;
+ path->slots[0]++;
+ while (path->slots[0] > 0) {
+ btrfs_item_key_to_cpu(leaf, &found_key, path->slots[0] - 1);
+
+ if (found_key.type == BTRFS_FREE_SPACE_INFO_KEY) {
+ ASSERT(found_key.objectid == block_group->key.objectid);
+ ASSERT(found_key.offset == block_group->key.offset);
+ done = 1;
+ break;
+ } else if (found_key.type == BTRFS_FREE_SPACE_EXTENT_KEY) {
+ u64 first, last;
+
+ ASSERT(found_key.objectid >= start);
+ ASSERT(found_key.objectid < end);
+ ASSERT(found_key.objectid + found_key.offset <= end);
+
+ first = div_u64(found_key.objectid - start,
+ block_group->sectorsize);
+ last = div_u64(found_key.objectid + found_key.offset - start,
+ block_group->sectorsize);
+ bitmap_set(bitmap, first, last - first);
+
+ extent_count++;
+ nr++;
+ path->slots[0]--;
+ } else {
+ ASSERT(0);
+ }
+ }
+
+ ret = btrfs_del_items(trans, root, path, path->slots[0], nr);
+ if (ret)
+ goto out;
+ btrfs_release_path(path);
+ }
+
+ info = search_free_space_info(trans, fs_info, block_group, path, 1);
+ if (IS_ERR(info)) {
+ ret = PTR_ERR(info);
+ goto out;
+ }
+ leaf = path->nodes[0];
+ flags = btrfs_free_space_flags(leaf, info);
+ flags |= BTRFS_FREE_SPACE_USING_BITMAPS;
+ btrfs_set_free_space_flags(leaf, info, flags);
+ expected_extent_count = btrfs_free_space_extent_count(leaf, info);
+ btrfs_mark_buffer_dirty(leaf);
+ btrfs_release_path(path);
+
+ if (extent_count != expected_extent_count) {
+ btrfs_err(fs_info, "incorrect extent count for %llu; counted %u, expected %u",
+ block_group->key.objectid, extent_count,
+ expected_extent_count);
+ ASSERT(0);
+ ret = -EIO;
+ goto out;
+ }
+
+ bitmap_cursor = (char *)bitmap;
+ bitmap_range = block_group->sectorsize * BTRFS_FREE_SPACE_BITMAP_BITS;
+ i = start;
+ while (i < end) {
+ unsigned long ptr;
+ u64 extent_size;
+ u32 data_size;
+
+ extent_size = min(end - i, bitmap_range);
+ data_size = free_space_bitmap_size(extent_size,
+ block_group->sectorsize);
+
+ key.objectid = i;
+ key.type = BTRFS_FREE_SPACE_BITMAP_KEY;
+ key.offset = extent_size;
+
+ ret = btrfs_insert_empty_item(trans, root, path, &key,
+ data_size);
+ if (ret)
+ goto out;
+
+ leaf = path->nodes[0];
+ ptr = btrfs_item_ptr_offset(leaf, path->slots[0]);
+ write_extent_buffer(leaf, bitmap_cursor, ptr,
+ data_size);
+ btrfs_mark_buffer_dirty(leaf);
+ btrfs_release_path(path);
+
+ i += extent_size;
+ bitmap_cursor += data_size;
+ }
+
+ ret = 0;
+out:
+ vfree(bitmap);
+ if (ret)
+ btrfs_abort_transaction(trans, root, ret);
+ return ret;
+}
+
+int convert_free_space_to_extents(struct btrfs_trans_handle *trans,
+ struct btrfs_fs_info *fs_info,
+ struct btrfs_block_group_cache *block_group,
+ struct btrfs_path *path)
+{
+ struct btrfs_root *root = fs_info->free_space_root;
+ struct btrfs_free_space_info *info;
+ struct btrfs_key key, found_key;
+ struct extent_buffer *leaf;
+ unsigned long *bitmap;
+ u64 start, end;
+ /* Initialize to silence GCC. */
+ u64 extent_start = 0;
+ u64 offset;
+ u32 bitmap_size, flags, expected_extent_count;
+ int prev_bit = 0, bit, bitnr;
+ u32 extent_count = 0;
+ int done = 0, nr;
+ int ret;
+
+ bitmap_size = free_space_bitmap_size(block_group->key.offset,
+ block_group->sectorsize);
+ bitmap = alloc_bitmap(bitmap_size);
+ if (!bitmap) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ start = block_group->key.objectid;
+ end = block_group->key.objectid + block_group->key.offset;
+
+ key.objectid = end - 1;
+ key.type = (u8)-1;
+ key.offset = (u64)-1;
+
+ while (!done) {
+ ret = btrfs_search_prev_slot(trans, root, &key, path, -1, 1);
+ if (ret)
+ goto out;
+
+ leaf = path->nodes[0];
+ nr = 0;
+ path->slots[0]++;
+ while (path->slots[0] > 0) {
+ btrfs_item_key_to_cpu(leaf, &found_key, path->slots[0] - 1);
+
+ if (found_key.type == BTRFS_FREE_SPACE_INFO_KEY) {
+ ASSERT(found_key.objectid == block_group->key.objectid);
+ ASSERT(found_key.offset == block_group->key.offset);
+ done = 1;
+ break;
+ } else if (found_key.type == BTRFS_FREE_SPACE_BITMAP_KEY) {
+ unsigned long ptr;
+ char *bitmap_cursor;
+ u32 bitmap_pos, data_size;
+
+ ASSERT(found_key.objectid >= start);
+ ASSERT(found_key.objectid < end);
+ ASSERT(found_key.objectid + found_key.offset <= end);
+
+ bitmap_pos = div_u64(found_key.objectid - start,
+ block_group->sectorsize *
+ BITS_PER_BYTE);
+ bitmap_cursor = ((char *)bitmap) + bitmap_pos;
+ data_size = free_space_bitmap_size(found_key.offset,
+ block_group->sectorsize);
+
+ ptr = btrfs_item_ptr_offset(leaf, path->slots[0] - 1);
+ read_extent_buffer(leaf, bitmap_cursor, ptr,
+ data_size);
+
+ nr++;
+ path->slots[0]--;
+ } else {
+ ASSERT(0);
+ }
+ }
+
+ ret = btrfs_del_items(trans, root, path, path->slots[0], nr);
+ if (ret)
+ goto out;
+ btrfs_release_path(path);
+ }
+
+ info = search_free_space_info(trans, fs_info, block_group, path, 1);
+ if (IS_ERR(info)) {
+ ret = PTR_ERR(info);
+ goto out;
+ }
+ leaf = path->nodes[0];
+ flags = btrfs_free_space_flags(leaf, info);
+ flags &= ~BTRFS_FREE_SPACE_USING_BITMAPS;
+ btrfs_set_free_space_flags(leaf, info, flags);
+ expected_extent_count = btrfs_free_space_extent_count(leaf, info);
+ btrfs_mark_buffer_dirty(leaf);
+ btrfs_release_path(path);
+
+ offset = start;
+ bitnr = 0;
+ while (offset < end) {
+ bit = !!test_bit(bitnr, bitmap);
+ if (prev_bit == 0 && bit == 1) {
+ extent_start = offset;
+ } else if (prev_bit == 1 && bit == 0) {
+ key.objectid = extent_start;
+ key.type = BTRFS_FREE_SPACE_EXTENT_KEY;
+ key.offset = offset - extent_start;
+
+ ret = btrfs_insert_empty_item(trans, root, path, &key, 0);
+ if (ret)
+ goto out;
+ btrfs_release_path(path);
+
+ extent_count++;
+ }
+ prev_bit = bit;
+ offset += block_group->sectorsize;
+ bitnr++;
+ }
+ if (prev_bit == 1) {
+ key.objectid = extent_start;
+ key.type = BTRFS_FREE_SPACE_EXTENT_KEY;
+ key.offset = end - extent_start;
+
+ ret = btrfs_insert_empty_item(trans, root, path, &key, 0);
+ if (ret)
+ goto out;
+ btrfs_release_path(path);
+
+ extent_count++;
+ }
+
+ if (extent_count != expected_extent_count) {
+ btrfs_err(fs_info, "incorrect extent count for %llu; counted %u, expected %u",
+ block_group->key.objectid, extent_count,
+ expected_extent_count);
+ ASSERT(0);
+ ret = -EIO;
+ goto out;
+ }
+
+ ret = 0;
+out:
+ vfree(bitmap);
+ if (ret)
+ btrfs_abort_transaction(trans, root, ret);
+ return ret;
+}
+
+static int update_free_space_extent_count(struct btrfs_trans_handle *trans,
+ struct btrfs_fs_info *fs_info,
+ struct btrfs_block_group_cache *block_group,
+ struct btrfs_path *path,
+ int new_extents)
+{
+ struct btrfs_free_space_info *info;
+ u32 flags;
+ u32 extent_count;
+ int ret = 0;
+
+ if (new_extents == 0)
+ return 0;
+
+ info = search_free_space_info(trans, fs_info, block_group, path, 1);
+ if (IS_ERR(info)) {
+ ret = PTR_ERR(info);
+ goto out;
+ }
+ flags = btrfs_free_space_flags(path->nodes[0], info);
+ extent_count = btrfs_free_space_extent_count(path->nodes[0], info);
+
+ extent_count += new_extents;
+ btrfs_set_free_space_extent_count(path->nodes[0], info, extent_count);
+ btrfs_mark_buffer_dirty(path->nodes[0]);
+ btrfs_release_path(path);
+
+ if (!(flags & BTRFS_FREE_SPACE_USING_BITMAPS) &&
+ extent_count > block_group->bitmap_high_thresh) {
+ ret = convert_free_space_to_bitmaps(trans, fs_info, block_group,
+ path);
+ } else if ((flags & BTRFS_FREE_SPACE_USING_BITMAPS) &&
+ extent_count < block_group->bitmap_low_thresh) {
+ ret = convert_free_space_to_extents(trans, fs_info, block_group,
+ path);
+ }
+
+out:
+ return ret;
+}
+
+int free_space_test_bit(struct btrfs_block_group_cache *block_group,
+ struct btrfs_path *path, u64 offset)
+{
+ struct extent_buffer *leaf;
+ struct btrfs_key key;
+ u64 found_start, found_end;
+ unsigned long ptr, i;
+
+ leaf = path->nodes[0];
+ btrfs_item_key_to_cpu(leaf, &key, path->slots[0]);
+ ASSERT(key.type == BTRFS_FREE_SPACE_BITMAP_KEY);
+
+ found_start = key.objectid;
+ found_end = key.objectid + key.offset;
+ ASSERT(offset >= found_start && offset < found_end);
+
+ ptr = btrfs_item_ptr_offset(leaf, path->slots[0]);
+ i = div_u64(offset - found_start, block_group->sectorsize);
+ return !!extent_buffer_test_bit(leaf, ptr, i);
+}
+
+static void free_space_set_bits(struct btrfs_block_group_cache *block_group,
+ struct btrfs_path *path, u64 *start, u64 *size,
+ int bit)
+{
+ struct extent_buffer *leaf;
+ struct btrfs_key key;
+ u64 end = *start + *size;
+ u64 found_start, found_end;
+ unsigned long ptr, first, last;
+
+ leaf = path->nodes[0];
+ btrfs_item_key_to_cpu(leaf, &key, path->slots[0]);
+ ASSERT(key.type == BTRFS_FREE_SPACE_BITMAP_KEY);
+
+ found_start = key.objectid;
+ found_end = key.objectid + key.offset;
+ ASSERT(*start >= found_start && *start < found_end);
+ ASSERT(end > found_start);
+
+ if (end > found_end)
+ end = found_end;
+
+ ptr = btrfs_item_ptr_offset(leaf, path->slots[0]);
+ first = div_u64(*start - found_start, block_group->sectorsize);
+ last = div_u64(end - found_start, block_group->sectorsize);
+ if (bit)
+ extent_buffer_bitmap_set(leaf, ptr, first, last - first);
+ else
+ extent_buffer_bitmap_clear(leaf, ptr, first, last - first);
+ btrfs_mark_buffer_dirty(leaf);
+
+ *size -= end - *start;
+ *start = end;
+}
+
+/*
+ * We can't use btrfs_next_item() in modify_free_space_bitmap() because
+ * btrfs_next_leaf() doesn't get the path for writing. We can forgo the fancy
+ * tree walking in btrfs_next_leaf() anyways because we know exactly what we're
+ * looking for.
+ */
+static int free_space_next_bitmap(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root, struct btrfs_path *p)
+{
+ struct btrfs_key key;
+
+ if (p->slots[0] + 1 < btrfs_header_nritems(p->nodes[0])) {
+ p->slots[0]++;
+ return 0;
+ }
+
+ btrfs_item_key_to_cpu(p->nodes[0], &key, p->slots[0]);
+ btrfs_release_path(p);
+
+ key.objectid += key.offset;
+ key.type = (u8)-1;
+ key.offset = (u64)-1;
+
+ return btrfs_search_prev_slot(trans, root, &key, p, 0, 1);
+}
+
+/*
+ * If remove is 1, then we are removing free space, thus clearing bits in the
+ * bitmap. If remove is 0, then we are adding free space, thus setting bits in
+ * the bitmap.
+ */
+static int modify_free_space_bitmap(struct btrfs_trans_handle *trans,
+ struct btrfs_fs_info *fs_info,
+ struct btrfs_block_group_cache *block_group,
+ struct btrfs_path *path,
+ u64 start, u64 size, int remove)
+{
+ struct btrfs_root *root = fs_info->free_space_root;
+ struct btrfs_key key;
+ u64 end = start + size;
+ u64 cur_start, cur_size;
+ int prev_bit, next_bit;
+ int new_extents;
+ int ret;
+
+ /*
+ * Read the bit for the block immediately before the extent of space if
+ * that block is within the block group.
+ */
+ if (start > block_group->key.objectid) {
+ u64 prev_block = start - block_group->sectorsize;
+
+ key.objectid = prev_block;
+ key.type = (u8)-1;
+ key.offset = (u64)-1;
+
+ ret = btrfs_search_prev_slot(trans, root, &key, path, 0, 1);
+ if (ret)
+ goto out;
+
+ prev_bit = free_space_test_bit(block_group, path, prev_block);
+
+ /* The previous block may have been in the previous bitmap. */
+ btrfs_item_key_to_cpu(path->nodes[0], &key, path->slots[0]);
+ if (start >= key.objectid + key.offset) {
+ ret = free_space_next_bitmap(trans, root, path);
+ if (ret)
+ goto out;
+ }
+ } else {
+ key.objectid = start;
+ key.type = (u8)-1;
+ key.offset = (u64)-1;
+
+ ret = btrfs_search_prev_slot(trans, root, &key, path, 0, 1);
+ if (ret)
+ goto out;
+
+ prev_bit = -1;
+ }
+
+ /*
+ * Iterate over all of the bitmaps overlapped by the extent of space,
+ * clearing/setting bits as required.
+ */
+ cur_start = start;
+ cur_size = size;
+ while (1) {
+ free_space_set_bits(block_group, path, &cur_start, &cur_size,
+ !remove);
+ if (cur_size == 0)
+ break;
+ ret = free_space_next_bitmap(trans, root, path);
+ if (ret)
+ goto out;
+ }
+
+ /*
+ * Read the bit for the block immediately after the extent of space if
+ * that block is within the block group.
+ */
+ if (end < block_group->key.objectid + block_group->key.offset) {
+ /* The next block may be in the next bitmap. */
+ btrfs_item_key_to_cpu(path->nodes[0], &key, path->slots[0]);
+ if (end >= key.objectid + key.offset) {
+ ret = free_space_next_bitmap(trans, root, path);
+ if (ret)
+ goto out;
+ }
+
+ next_bit = free_space_test_bit(block_group, path, end);
+ } else {
+ next_bit = -1;
+ }
+
+ if (remove) {
+ new_extents = -1;
+ if (prev_bit == 1) {
+ /* Leftover on the left. */
+ new_extents++;
+ }
+ if (next_bit == 1) {
+ /* Leftover on the right. */
+ new_extents++;
+ }
+ } else {
+ new_extents = 1;
+ if (prev_bit == 1) {
+ /* Merging with neighbor on the left. */
+ new_extents--;
+ }
+ if (next_bit == 1) {
+ /* Merging with neighbor on the right. */
+ new_extents--;
+ }
+ }
+
+ btrfs_release_path(path);
+ ret = update_free_space_extent_count(trans, fs_info, block_group, path,
+ new_extents);
+
+out:
+ return ret;
+}
+
+static int remove_free_space_extent(struct btrfs_trans_handle *trans,
+ struct btrfs_fs_info *fs_info,
+ struct btrfs_block_group_cache *block_group,
+ struct btrfs_path *path,
+ u64 start, u64 size)
+{
+ struct btrfs_root *root = fs_info->free_space_root;
+ struct btrfs_key key;
+ u64 found_start, found_end;
+ u64 end = start + size;
+ int new_extents = -1;
+ int ret;
+
+ key.objectid = start;
+ key.type = (u8)-1;
+ key.offset = (u64)-1;
+
+ ret = btrfs_search_prev_slot(trans, root, &key, path, -1, 1);
+ if (ret)
+ goto out;
+
+ btrfs_item_key_to_cpu(path->nodes[0], &key, path->slots[0]);
+
+ ASSERT(key.type == BTRFS_FREE_SPACE_EXTENT_KEY);
+
+ found_start = key.objectid;
+ found_end = key.objectid + key.offset;
+ ASSERT(start >= found_start && end <= found_end);
+
+ /*
+ * Okay, now that we've found the free space extent which contains the
+ * free space that we are removing, there are four cases:
+ *
+ * 1. We're using the whole extent: delete the key we found and
+ * decrement the free space extent count.
+ * 2. We are using part of the extent starting at the beginning: delete
+ * the key we found and insert a new key representing the leftover at
+ * the end. There is no net change in the number of extents.
+ * 3. We are using part of the extent ending at the end: delete the key
+ * we found and insert a new key representing the leftover at the
+ * beginning. There is no net change in the number of extents.
+ * 4. We are using part of the extent in the middle: delete the key we
+ * found and insert two new keys representing the leftovers on each
+ * side. Where we used to have one extent, we now have two, so increment
+ * the extent count. We may need to convert the block group to bitmaps
+ * as a result.
+ */
+
+ /* Delete the existing key (cases 1-4). */
+ ret = btrfs_del_item(trans, root, path);
+ if (ret)
+ goto out;
+
+ /* Add a key for leftovers at the beginning (cases 3 and 4). */
+ if (start > found_start) {
+ key.objectid = found_start;
+ key.type = BTRFS_FREE_SPACE_EXTENT_KEY;
+ key.offset = start - found_start;
+
+ btrfs_release_path(path);
+ ret = btrfs_insert_empty_item(trans, root, path, &key, 0);
+ if (ret)
+ goto out;
+ new_extents++;
+ }
+
+ /* Add a key for leftovers at the end (cases 2 and 4). */
+ if (end < found_end) {
+ key.objectid = end;
+ key.type = BTRFS_FREE_SPACE_EXTENT_KEY;
+ key.offset = found_end - end;
+
+ btrfs_release_path(path);
+ ret = btrfs_insert_empty_item(trans, root, path, &key, 0);
+ if (ret)
+ goto out;
+ new_extents++;
+ }
+
+ btrfs_release_path(path);
+ ret = update_free_space_extent_count(trans, fs_info, block_group, path,
+ new_extents);
+
+out:
+ return ret;
+}
+
+int __remove_from_free_space_tree(struct btrfs_trans_handle *trans,
+ struct btrfs_fs_info *fs_info,
+ struct btrfs_block_group_cache *block_group,
+ struct btrfs_path *path, u64 start, u64 size)
+{
+ struct btrfs_free_space_info *info;
+ u32 flags;
+ int ret;
+
+ if (block_group->needs_free_space) {
+ ret = __add_block_group_free_space(trans, fs_info, block_group,
+ path);
+ if (ret)
+ return ret;
+ }
+
+ info = search_free_space_info(NULL, fs_info, block_group, path, 0);
+ if (IS_ERR(info))
+ return PTR_ERR(info);
+ flags = btrfs_free_space_flags(path->nodes[0], info);
+ btrfs_release_path(path);
+
+ if (flags & BTRFS_FREE_SPACE_USING_BITMAPS) {
+ return modify_free_space_bitmap(trans, fs_info, block_group,
+ path, start, size, 1);
+ } else {
+ return remove_free_space_extent(trans, fs_info, block_group,
+ path, start, size);
+ }
+}
+
+int remove_from_free_space_tree(struct btrfs_trans_handle *trans,
+ struct btrfs_fs_info *fs_info,
+ u64 start, u64 size)
+{
+ struct btrfs_block_group_cache *block_group;
+ struct btrfs_path *path;
+ int ret;
+
+ if (!btrfs_fs_compat_ro(fs_info, FREE_SPACE_TREE))
+ return 0;
+
+ path = btrfs_alloc_path();
+ if (!path) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ block_group = btrfs_lookup_block_group(fs_info, start);
+ if (!block_group) {
+ ASSERT(0);
+ ret = -ENOENT;
+ goto out;
+ }
+
+ mutex_lock(&block_group->free_space_lock);
+ ret = __remove_from_free_space_tree(trans, fs_info, block_group, path,
+ start, size);
+ mutex_unlock(&block_group->free_space_lock);
+
+ btrfs_put_block_group(block_group);
+out:
+ btrfs_free_path(path);
+ if (ret)
+ btrfs_abort_transaction(trans, fs_info->free_space_root, ret);
+ return ret;
+}
+
+static int add_free_space_extent(struct btrfs_trans_handle *trans,
+ struct btrfs_fs_info *fs_info,
+ struct btrfs_block_group_cache *block_group,
+ struct btrfs_path *path,
+ u64 start, u64 size)
+{
+ struct btrfs_root *root = fs_info->free_space_root;
+ struct btrfs_key key, new_key;
+ u64 found_start, found_end;
+ u64 end = start + size;
+ int new_extents = 1;
+ int ret;
+
+ /*
+ * We are adding a new extent of free space, but we need to merge
+ * extents. There are four cases here:
+ *
+ * 1. The new extent does not have any immediate neighbors to merge
+ * with: add the new key and increment the free space extent count. We
+ * may need to convert the block group to bitmaps as a result.
+ * 2. The new extent has an immediate neighbor before it: remove the
+ * previous key and insert a new key combining both of them. There is no
+ * net change in the number of extents.
+ * 3. The new extent has an immediate neighbor after it: remove the next
+ * key and insert a new key combining both of them. There is no net
+ * change in the number of extents.
+ * 4. The new extent has immediate neighbors on both sides: remove both
+ * of the keys and insert a new key combining all of them. Where we used
+ * to have two extents, we now have one, so decrement the extent count.
+ */
+
+ new_key.objectid = start;
+ new_key.type = BTRFS_FREE_SPACE_EXTENT_KEY;
+ new_key.offset = size;
+
+ /* Search for a neighbor on the left. */
+ if (start == block_group->key.objectid)
+ goto right;
+ key.objectid = start - 1;
+ key.type = (u8)-1;
+ key.offset = (u64)-1;
+
+ ret = btrfs_search_prev_slot(trans, root, &key, path, -1, 1);
+ if (ret)
+ goto out;
+
+ btrfs_item_key_to_cpu(path->nodes[0], &key, path->slots[0]);
+
+ if (key.type != BTRFS_FREE_SPACE_EXTENT_KEY) {
+ ASSERT(key.type == BTRFS_FREE_SPACE_INFO_KEY);
+ btrfs_release_path(path);
+ goto right;
+ }
+
+ found_start = key.objectid;
+ found_end = key.objectid + key.offset;
+ ASSERT(found_start >= block_group->key.objectid &&
+ found_end > block_group->key.objectid);
+ ASSERT(found_start < start && found_end <= start);
+
+ /*
+ * Delete the neighbor on the left and absorb it into the new key (cases
+ * 2 and 4).
+ */
+ if (found_end == start) {
+ ret = btrfs_del_item(trans, root, path);
+ if (ret)
+ goto out;
+ new_key.objectid = found_start;
+ new_key.offset += key.offset;
+ new_extents--;
+ }
+ btrfs_release_path(path);
+
+right:
+ /* Search for a neighbor on the right. */
+ if (end == block_group->key.objectid + block_group->key.offset)
+ goto insert;
+ key.objectid = end;
+ key.type = (u8)-1;
+ key.offset = (u64)-1;
+
+ ret = btrfs_search_prev_slot(trans, root, &key, path, -1, 1);
+ if (ret)
+ goto out;
+
+ btrfs_item_key_to_cpu(path->nodes[0], &key, path->slots[0]);
+
+ if (key.type != BTRFS_FREE_SPACE_EXTENT_KEY) {
+ ASSERT(key.type == BTRFS_FREE_SPACE_INFO_KEY);
+ btrfs_release_path(path);
+ goto insert;
+ }
+
+ found_start = key.objectid;
+ found_end = key.objectid + key.offset;
+ ASSERT(found_start >= block_group->key.objectid &&
+ found_end > block_group->key.objectid);
+ ASSERT((found_start < start && found_end <= start) ||
+ (found_start >= end && found_end > end));
+
+ /*
+ * Delete the neighbor on the right and absorb it into the new key
+ * (cases 3 and 4).
+ */
+ if (found_start == end) {
+ ret = btrfs_del_item(trans, root, path);
+ if (ret)
+ goto out;
+ new_key.offset += key.offset;
+ new_extents--;
+ }
+ btrfs_release_path(path);
+
+insert:
+ /* Insert the new key (cases 1-4). */
+ ret = btrfs_insert_empty_item(trans, root, path, &new_key, 0);
+ if (ret)
+ goto out;
+
+ btrfs_release_path(path);
+ ret = update_free_space_extent_count(trans, fs_info, block_group, path,
+ new_extents);
+
+out:
+ return ret;
+}
+
+int __add_to_free_space_tree(struct btrfs_trans_handle *trans,
+ struct btrfs_fs_info *fs_info,
+ struct btrfs_block_group_cache *block_group,
+ struct btrfs_path *path, u64 start, u64 size)
+{
+ struct btrfs_free_space_info *info;
+ u32 flags;
+ int ret;
+
+ if (block_group->needs_free_space) {
+ ret = __add_block_group_free_space(trans, fs_info, block_group,
+ path);
+ if (ret)
+ return ret;
+ }
+
+ info = search_free_space_info(NULL, fs_info, block_group, path, 0);
+ if (IS_ERR(info))
+ return PTR_ERR(info);
+ flags = btrfs_free_space_flags(path->nodes[0], info);
+ btrfs_release_path(path);
+
+ if (flags & BTRFS_FREE_SPACE_USING_BITMAPS) {
+ return modify_free_space_bitmap(trans, fs_info, block_group,
+ path, start, size, 0);
+ } else {
+ return add_free_space_extent(trans, fs_info, block_group, path,
+ start, size);
+ }
+}
+
+int add_to_free_space_tree(struct btrfs_trans_handle *trans,
+ struct btrfs_fs_info *fs_info,
+ u64 start, u64 size)
+{
+ struct btrfs_block_group_cache *block_group;
+ struct btrfs_path *path;
+ int ret;
+
+ if (!btrfs_fs_compat_ro(fs_info, FREE_SPACE_TREE))
+ return 0;
+
+ path = btrfs_alloc_path();
+ if (!path) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ block_group = btrfs_lookup_block_group(fs_info, start);
+ if (!block_group) {
+ ASSERT(0);
+ ret = -ENOENT;
+ goto out;
+ }
+
+ mutex_lock(&block_group->free_space_lock);
+ ret = __add_to_free_space_tree(trans, fs_info, block_group, path, start,
+ size);
+ mutex_unlock(&block_group->free_space_lock);
+
+ btrfs_put_block_group(block_group);
+out:
+ btrfs_free_path(path);
+ if (ret)
+ btrfs_abort_transaction(trans, fs_info->free_space_root, ret);
+ return ret;
+}
+
+/*
+ * Populate the free space tree by walking the extent tree. Operations on the
+ * extent tree that happen as a result of writes to the free space tree will go
+ * through the normal add/remove hooks.
+ */
+static int populate_free_space_tree(struct btrfs_trans_handle *trans,
+ struct btrfs_fs_info *fs_info,
+ struct btrfs_block_group_cache *block_group)
+{
+ struct btrfs_root *extent_root = fs_info->extent_root;
+ struct btrfs_path *path, *path2;
+ struct btrfs_key key;
+ u64 start, end;
+ int ret;
+
+ path = btrfs_alloc_path();
+ if (!path)
+ return -ENOMEM;
+ path->reada = 1;
+
+ path2 = btrfs_alloc_path();
+ if (!path2) {
+ btrfs_free_path(path);
+ return -ENOMEM;
+ }
+
+ ret = add_new_free_space_info(trans, fs_info, block_group, path2);
+ if (ret)
+ goto out;
+
+ mutex_lock(&block_group->free_space_lock);
+
+ /*
+ * Iterate through all of the extent and metadata items in this block
+ * group, adding the free space between them and the free space at the
+ * end. Note that EXTENT_ITEM and METADATA_ITEM are less than
+ * BLOCK_GROUP_ITEM, so an extent may precede the block group that it's
+ * contained in.
+ */
+ key.objectid = block_group->key.objectid;
+ key.type = BTRFS_EXTENT_ITEM_KEY;
+ key.offset = 0;
+
+ ret = btrfs_search_slot_for_read(extent_root, &key, path, 1, 0);
+ if (ret < 0)
+ goto out_locked;
+ ASSERT(ret == 0);
+
+ start = block_group->key.objectid;
+ end = block_group->key.objectid + block_group->key.offset;
+ while (1) {
+ btrfs_item_key_to_cpu(path->nodes[0], &key, path->slots[0]);
+
+ if (key.type == BTRFS_EXTENT_ITEM_KEY ||
+ key.type == BTRFS_METADATA_ITEM_KEY) {
+ if (key.objectid >= end)
+ break;
+
+ if (start < key.objectid) {
+ ret = __add_to_free_space_tree(trans, fs_info,
+ block_group,
+ path2, start,
+ key.objectid -
+ start);
+ if (ret)
+ goto out_locked;
+ }
+ start = key.objectid;
+ if (key.type == BTRFS_METADATA_ITEM_KEY)
+ start += fs_info->tree_root->nodesize;
+ else
+ start += key.offset;
+ } else if (key.type == BTRFS_BLOCK_GROUP_ITEM_KEY) {
+ if (key.objectid != block_group->key.objectid)
+ break;
+ }
+
+ ret = btrfs_next_item(extent_root, path);
+ if (ret < 0)
+ goto out_locked;
+ if (ret)
+ break;
+ }
+ if (start < end) {
+ ret = __add_to_free_space_tree(trans, fs_info, block_group,
+ path2, start, end - start);
+ if (ret)
+ goto out_locked;
+ }
+
+ ret = 0;
+out_locked:
+ mutex_unlock(&block_group->free_space_lock);
+out:
+ btrfs_free_path(path2);
+ btrfs_free_path(path);
+ return ret;
+}
+
+int btrfs_create_free_space_tree(struct btrfs_fs_info *fs_info)
+{
+ struct btrfs_trans_handle *trans;
+ struct btrfs_root *tree_root = fs_info->tree_root;
+ struct btrfs_root *free_space_root;
+ struct btrfs_block_group_cache *block_group;
+ struct rb_node *node;
+ int ret;
+
+ trans = btrfs_start_transaction(tree_root, 0);
+ if (IS_ERR(trans))
+ return PTR_ERR(trans);
+
+ fs_info->creating_free_space_tree = 1;
+ free_space_root = btrfs_create_tree(trans, fs_info,
+ BTRFS_FREE_SPACE_TREE_OBJECTID);
+ if (IS_ERR(free_space_root)) {
+ ret = PTR_ERR(free_space_root);
+ goto abort;
+ }
+ fs_info->free_space_root = free_space_root;
+
+ node = rb_first(&fs_info->block_group_cache_tree);
+ while (node) {
+ block_group = rb_entry(node, struct btrfs_block_group_cache,
+ cache_node);
+ ret = populate_free_space_tree(trans, fs_info, block_group);
+ if (ret)
+ goto abort;
+ node = rb_next(node);
+ }
+
+ btrfs_set_fs_compat_ro(fs_info, FREE_SPACE_TREE);
+ fs_info->creating_free_space_tree = 0;
+
+ ret = btrfs_commit_transaction(trans, tree_root);
+ if (ret)
+ return ret;
+
+ return 0;
+
+abort:
+ fs_info->creating_free_space_tree = 0;
+ btrfs_abort_transaction(trans, tree_root, ret);
+ btrfs_end_transaction(trans, tree_root);
+ return ret;
+}
+
+static int clear_free_space_tree(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root)
+{
+ struct btrfs_path *path;
+ struct btrfs_key key;
+ int nr;
+ int ret;
+
+ path = btrfs_alloc_path();
+ if (!path)
+ return -ENOMEM;
+
+ path->leave_spinning = 1;
+
+ key.objectid = 0;
+ key.type = 0;
+ key.offset = 0;
+
+ while (1) {
+ ret = btrfs_search_slot(trans, root, &key, path, -1, 1);
+ if (ret < 0)
+ goto out;
+
+ nr = btrfs_header_nritems(path->nodes[0]);
+ if (!nr)
+ break;
+
+ path->slots[0] = 0;
+ ret = btrfs_del_items(trans, root, path, 0, nr);
+ if (ret)
+ goto out;
+
+ btrfs_release_path(path);
+ }
+
+ ret = 0;
+out:
+ btrfs_free_path(path);
+ return ret;
+}
+
+int btrfs_clear_free_space_tree(struct btrfs_fs_info *fs_info)
+{
+ struct btrfs_trans_handle *trans;
+ struct btrfs_root *tree_root = fs_info->tree_root;
+ struct btrfs_root *free_space_root = fs_info->free_space_root;
+ int ret;
+
+ trans = btrfs_start_transaction(tree_root, 0);
+ if (IS_ERR(trans))
+ return PTR_ERR(trans);
+
+ btrfs_clear_fs_compat_ro(fs_info, FREE_SPACE_TREE);
+ fs_info->free_space_root = NULL;
+
+ ret = clear_free_space_tree(trans, free_space_root);
+ if (ret)
+ goto abort;
+
+ ret = btrfs_del_root(trans, tree_root, &free_space_root->root_key);
+ if (ret)
+ goto abort;
+
+ list_del(&free_space_root->dirty_list);
+
+ btrfs_tree_lock(free_space_root->node);
+ clean_tree_block(trans, tree_root->fs_info, free_space_root->node);
+ btrfs_tree_unlock(free_space_root->node);
+ btrfs_free_tree_block(trans, free_space_root, free_space_root->node,
+ 0, 1);
+
+ free_extent_buffer(free_space_root->node);
+ free_extent_buffer(free_space_root->commit_root);
+ kfree(free_space_root);
+
+ ret = btrfs_commit_transaction(trans, tree_root);
+ if (ret)
+ return ret;
+
+ return 0;
+
+abort:
+ btrfs_abort_transaction(trans, tree_root, ret);
+ btrfs_end_transaction(trans, tree_root);
+ return ret;
+}
+
+static int __add_block_group_free_space(struct btrfs_trans_handle *trans,
+ struct btrfs_fs_info *fs_info,
+ struct btrfs_block_group_cache *block_group,
+ struct btrfs_path *path)
+{
+ u64 start, end;
+ int ret;
+
+ start = block_group->key.objectid;
+ end = block_group->key.objectid + block_group->key.offset;
+
+ block_group->needs_free_space = 0;
+
+ ret = add_new_free_space_info(trans, fs_info, block_group, path);
+ if (ret)
+ return ret;
+
+ return __add_to_free_space_tree(trans, fs_info, block_group, path,
+ block_group->key.objectid,
+ block_group->key.offset);
+}
+
+int add_block_group_free_space(struct btrfs_trans_handle *trans,
+ struct btrfs_fs_info *fs_info,
+ struct btrfs_block_group_cache *block_group)
+{
+ struct btrfs_path *path = NULL;
+ int ret = 0;
+
+ if (!btrfs_fs_compat_ro(fs_info, FREE_SPACE_TREE))
+ return 0;
+
+ mutex_lock(&block_group->free_space_lock);
+ if (!block_group->needs_free_space)
+ goto out;
+
+ path = btrfs_alloc_path();
+ if (!path) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ ret = __add_block_group_free_space(trans, fs_info, block_group, path);
+
+out:
+ btrfs_free_path(path);
+ mutex_unlock(&block_group->free_space_lock);
+ if (ret)
+ btrfs_abort_transaction(trans, fs_info->free_space_root, ret);
+ return ret;
+}
+
+int remove_block_group_free_space(struct btrfs_trans_handle *trans,
+ struct btrfs_fs_info *fs_info,
+ struct btrfs_block_group_cache *block_group)
+{
+ struct btrfs_root *root = fs_info->free_space_root;
+ struct btrfs_path *path;
+ struct btrfs_key key, found_key;
+ struct extent_buffer *leaf;
+ u64 start, end;
+ int done = 0, nr;
+ int ret;
+
+ if (!btrfs_fs_compat_ro(fs_info, FREE_SPACE_TREE))
+ return 0;
+
+ if (block_group->needs_free_space) {
+ /* We never added this block group to the free space tree. */
+ return 0;
+ }
+
+ path = btrfs_alloc_path();
+ if (!path) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ start = block_group->key.objectid;
+ end = block_group->key.objectid + block_group->key.offset;
+
+ key.objectid = end - 1;
+ key.type = (u8)-1;
+ key.offset = (u64)-1;
+
+ while (!done) {
+ ret = btrfs_search_prev_slot(trans, root, &key, path, -1, 1);
+ if (ret)
+ goto out;
+
+ leaf = path->nodes[0];
+ nr = 0;
+ path->slots[0]++;
+ while (path->slots[0] > 0) {
+ btrfs_item_key_to_cpu(leaf, &found_key, path->slots[0] - 1);
+
+ if (found_key.type == BTRFS_FREE_SPACE_INFO_KEY) {
+ ASSERT(found_key.objectid == block_group->key.objectid);
+ ASSERT(found_key.offset == block_group->key.offset);
+ done = 1;
+ nr++;
+ path->slots[0]--;
+ break;
+ } else if (found_key.type == BTRFS_FREE_SPACE_EXTENT_KEY ||
+ found_key.type == BTRFS_FREE_SPACE_BITMAP_KEY) {
+ ASSERT(found_key.objectid >= start);
+ ASSERT(found_key.objectid < end);
+ ASSERT(found_key.objectid + found_key.offset <= end);
+ nr++;
+ path->slots[0]--;
+ } else {
+ ASSERT(0);
+ }
+ }
+
+ ret = btrfs_del_items(trans, root, path, path->slots[0], nr);
+ if (ret)
+ goto out;
+ btrfs_release_path(path);
+ }
+
+ ret = 0;
+out:
+ btrfs_free_path(path);
+ if (ret)
+ btrfs_abort_transaction(trans, root, ret);
+ return ret;
+}
+
+static int load_free_space_bitmaps(struct btrfs_caching_control *caching_ctl,
+ struct btrfs_path *path,
+ u32 expected_extent_count)
+{
+ struct btrfs_block_group_cache *block_group;
+ struct btrfs_fs_info *fs_info;
+ struct btrfs_root *root;
+ struct btrfs_key key;
+ int prev_bit = 0, bit;
+ /* Initialize to silence GCC. */
+ u64 extent_start = 0;
+ u64 end, offset;
+ u64 total_found = 0;
+ u32 extent_count = 0;
+ int ret;
+
+ block_group = caching_ctl->block_group;
+ fs_info = block_group->fs_info;
+ root = fs_info->free_space_root;
+
+ end = block_group->key.objectid + block_group->key.offset;
+
+ while (1) {
+ ret = btrfs_next_item(root, path);
+ if (ret < 0)
+ goto out;
+ if (ret)
+ break;
+
+ btrfs_item_key_to_cpu(path->nodes[0], &key, path->slots[0]);
+
+ if (key.type == BTRFS_FREE_SPACE_INFO_KEY)
+ break;
+
+ ASSERT(key.type == BTRFS_FREE_SPACE_BITMAP_KEY);
+ ASSERT(key.objectid < end && key.objectid + key.offset <= end);
+
+ caching_ctl->progress = key.objectid;
+
+ offset = key.objectid;
+ while (offset < key.objectid + key.offset) {
+ bit = free_space_test_bit(block_group, path, offset);
+ if (prev_bit == 0 && bit == 1) {
+ extent_start = offset;
+ } else if (prev_bit == 1 && bit == 0) {
+ total_found += add_new_free_space(block_group,
+ fs_info,
+ extent_start,
+ offset);
+ if (total_found > CACHING_CTL_WAKE_UP) {
+ total_found = 0;
+ wake_up(&caching_ctl->wait);
+ }
+ extent_count++;
+ }
+ prev_bit = bit;
+ offset += block_group->sectorsize;
+ }
+ }
+ if (prev_bit == 1) {
+ total_found += add_new_free_space(block_group, fs_info,
+ extent_start, end);
+ extent_count++;
+ }
+
+ if (extent_count != expected_extent_count) {
+ btrfs_err(fs_info, "incorrect extent count for %llu; counted %u, expected %u",
+ block_group->key.objectid, extent_count,
+ expected_extent_count);
+ ASSERT(0);
+ ret = -EIO;
+ goto out;
+ }
+
+ caching_ctl->progress = (u64)-1;
+
+ ret = 0;
+out:
+ return ret;
+}
+
+static int load_free_space_extents(struct btrfs_caching_control *caching_ctl,
+ struct btrfs_path *path,
+ u32 expected_extent_count)
+{
+ struct btrfs_block_group_cache *block_group;
+ struct btrfs_fs_info *fs_info;
+ struct btrfs_root *root;
+ struct btrfs_key key;
+ u64 end;
+ u64 total_found = 0;
+ u32 extent_count = 0;
+ int ret;
+
+ block_group = caching_ctl->block_group;
+ fs_info = block_group->fs_info;
+ root = fs_info->free_space_root;
+
+ end = block_group->key.objectid + block_group->key.offset;
+
+ while (1) {
+ ret = btrfs_next_item(root, path);
+ if (ret < 0)
+ goto out;
+ if (ret)
+ break;
+
+ btrfs_item_key_to_cpu(path->nodes[0], &key, path->slots[0]);
+
+ if (key.type == BTRFS_FREE_SPACE_INFO_KEY)
+ break;
+
+ ASSERT(key.type == BTRFS_FREE_SPACE_EXTENT_KEY);
+ ASSERT(key.objectid < end && key.objectid + key.offset <= end);
+
+ caching_ctl->progress = key.objectid;
+
+ total_found += add_new_free_space(block_group, fs_info,
+ key.objectid,
+ key.objectid + key.offset);
+ if (total_found > CACHING_CTL_WAKE_UP) {
+ total_found = 0;
+ wake_up(&caching_ctl->wait);
+ }
+ extent_count++;
+ }
+
+ if (extent_count != expected_extent_count) {
+ btrfs_err(fs_info, "incorrect extent count for %llu; counted %u, expected %u",
+ block_group->key.objectid, extent_count,
+ expected_extent_count);
+ ASSERT(0);
+ ret = -EIO;
+ goto out;
+ }
+
+ caching_ctl->progress = (u64)-1;
+
+ ret = 0;
+out:
+ return ret;
+}
+
+int load_free_space_tree(struct btrfs_caching_control *caching_ctl)
+{
+ struct btrfs_block_group_cache *block_group;
+ struct btrfs_fs_info *fs_info;
+ struct btrfs_free_space_info *info;
+ struct btrfs_path *path;
+ u32 extent_count, flags;
+ int ret;
+
+ block_group = caching_ctl->block_group;
+ fs_info = block_group->fs_info;
+
+ path = btrfs_alloc_path();
+ if (!path)
+ return -ENOMEM;
+
+ /*
+ * Just like caching_thread() doesn't want to deadlock on the extent
+ * tree, we don't want to deadlock on the free space tree.
+ */
+ path->skip_locking = 1;
+ path->search_commit_root = 1;
+ path->reada = 1;
+
+ info = search_free_space_info(NULL, fs_info, block_group, path, 0);
+ if (IS_ERR(info)) {
+ ret = PTR_ERR(info);
+ goto out;
+ }
+ extent_count = btrfs_free_space_extent_count(path->nodes[0], info);
+ flags = btrfs_free_space_flags(path->nodes[0], info);
+
+ /*
+ * We left path pointing to the free space info item, so now
+ * load_free_space_foo can just iterate through the free space tree from
+ * there.
+ */
+ if (flags & BTRFS_FREE_SPACE_USING_BITMAPS)
+ ret = load_free_space_bitmaps(caching_ctl, path, extent_count);
+ else
+ ret = load_free_space_extents(caching_ctl, path, extent_count);
+
+out:
+ btrfs_free_path(path);
+ return ret;
+}
diff --git a/fs/btrfs/free-space-tree.h b/fs/btrfs/free-space-tree.h
new file mode 100644
index 000000000000..54ffced3bce8
--- /dev/null
+++ b/fs/btrfs/free-space-tree.h
@@ -0,0 +1,72 @@
+/*
+ * Copyright (C) 2015 Facebook. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public
+ * License v2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public
+ * License along with this program; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 021110-1307, USA.
+ */
+
+#ifndef __BTRFS_FREE_SPACE_TREE
+#define __BTRFS_FREE_SPACE_TREE
+
+/*
+ * The default size for new free space bitmap items. The last bitmap in a block
+ * group may be truncated, and none of the free space tree code assumes that
+ * existing bitmaps are this size.
+ */
+#define BTRFS_FREE_SPACE_BITMAP_SIZE 256
+#define BTRFS_FREE_SPACE_BITMAP_BITS (BTRFS_FREE_SPACE_BITMAP_SIZE * BITS_PER_BYTE)
+
+void set_free_space_tree_thresholds(struct btrfs_block_group_cache *block_group);
+int btrfs_create_free_space_tree(struct btrfs_fs_info *fs_info);
+int btrfs_clear_free_space_tree(struct btrfs_fs_info *fs_info);
+int load_free_space_tree(struct btrfs_caching_control *caching_ctl);
+int add_block_group_free_space(struct btrfs_trans_handle *trans,
+ struct btrfs_fs_info *fs_info,
+ struct btrfs_block_group_cache *block_group);
+int remove_block_group_free_space(struct btrfs_trans_handle *trans,
+ struct btrfs_fs_info *fs_info,
+ struct btrfs_block_group_cache *block_group);
+int add_to_free_space_tree(struct btrfs_trans_handle *trans,
+ struct btrfs_fs_info *fs_info,
+ u64 start, u64 size);
+int remove_from_free_space_tree(struct btrfs_trans_handle *trans,
+ struct btrfs_fs_info *fs_info,
+ u64 start, u64 size);
+
+/* Exposed for testing. */
+struct btrfs_free_space_info *
+search_free_space_info(struct btrfs_trans_handle *trans,
+ struct btrfs_fs_info *fs_info,
+ struct btrfs_block_group_cache *block_group,
+ struct btrfs_path *path, int cow);
+int __add_to_free_space_tree(struct btrfs_trans_handle *trans,
+ struct btrfs_fs_info *fs_info,
+ struct btrfs_block_group_cache *block_group,
+ struct btrfs_path *path, u64 start, u64 size);
+int __remove_from_free_space_tree(struct btrfs_trans_handle *trans,
+ struct btrfs_fs_info *fs_info,
+ struct btrfs_block_group_cache *block_group,
+ struct btrfs_path *path, u64 start, u64 size);
+int convert_free_space_to_bitmaps(struct btrfs_trans_handle *trans,
+ struct btrfs_fs_info *fs_info,
+ struct btrfs_block_group_cache *block_group,
+ struct btrfs_path *path);
+int convert_free_space_to_extents(struct btrfs_trans_handle *trans,
+ struct btrfs_fs_info *fs_info,
+ struct btrfs_block_group_cache *block_group,
+ struct btrfs_path *path);
+int free_space_test_bit(struct btrfs_block_group_cache *block_group,
+ struct btrfs_path *path, u64 offset);
+
+#endif
diff --git a/fs/btrfs/inode-map.c b/fs/btrfs/inode-map.c
index 29e23a57d6f3..e50316c4af15 100644
--- a/fs/btrfs/inode-map.c
+++ b/fs/btrfs/inode-map.c
@@ -282,7 +282,7 @@ void btrfs_unpin_free_ino(struct btrfs_root *root)
}
}
-#define INIT_THRESHOLD (((1024 * 32) / 2) / sizeof(struct btrfs_free_space))
+#define INIT_THRESHOLD ((SZ_32K / 2) / sizeof(struct btrfs_free_space))
#define INODES_PER_BITMAP (PAGE_CACHE_SIZE * 8)
/*
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index dc2c1bedbafa..85afe66955cf 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -66,6 +66,13 @@ struct btrfs_iget_args {
struct btrfs_root *root;
};
+struct btrfs_dio_data {
+ u64 outstanding_extents;
+ u64 reserve;
+ u64 unsubmitted_oe_range_start;
+ u64 unsubmitted_oe_range_end;
+};
+
static const struct inode_operations btrfs_dir_inode_operations;
static const struct inode_operations btrfs_symlink_inode_operations;
static const struct inode_operations btrfs_dir_ro_inode_operations;
@@ -413,15 +420,15 @@ static noinline void compress_file_range(struct inode *inode,
unsigned long nr_pages_ret = 0;
unsigned long total_compressed = 0;
unsigned long total_in = 0;
- unsigned long max_compressed = 128 * 1024;
- unsigned long max_uncompressed = 128 * 1024;
+ unsigned long max_compressed = SZ_128K;
+ unsigned long max_uncompressed = SZ_128K;
int i;
int will_compress;
int compress_type = root->fs_info->compress_type;
int redirty = 0;
/* if this is a small write inside eof, kick off a defrag */
- if ((end - start + 1) < 16 * 1024 &&
+ if ((end - start + 1) < SZ_16K &&
(start > 0 || end + 1 < BTRFS_I(inode)->disk_i_size))
btrfs_add_inode_defrag(NULL, inode);
@@ -429,7 +436,7 @@ static noinline void compress_file_range(struct inode *inode,
again:
will_compress = 0;
nr_pages = (end >> PAGE_CACHE_SHIFT) - (start >> PAGE_CACHE_SHIFT) + 1;
- nr_pages = min(nr_pages, (128 * 1024UL) / PAGE_CACHE_SIZE);
+ nr_pages = min_t(unsigned long, nr_pages, SZ_128K / PAGE_CACHE_SIZE);
/*
* we don't want to send crud past the end of i_size through
@@ -943,7 +950,7 @@ static noinline int cow_file_range(struct inode *inode,
disk_num_bytes = num_bytes;
/* if this is a small write inside eof, kick off defrag */
- if (num_bytes < 64 * 1024 &&
+ if (num_bytes < SZ_64K &&
(start > 0 || end + 1 < BTRFS_I(inode)->disk_i_size))
btrfs_add_inode_defrag(NULL, inode);
@@ -1106,7 +1113,7 @@ static noinline void async_cow_submit(struct btrfs_work *work)
* atomic_sub_return implies a barrier for waitqueue_active
*/
if (atomic_sub_return(nr_pages, &root->fs_info->async_delalloc_pages) <
- 5 * 1024 * 1024 &&
+ 5 * SZ_1M &&
waitqueue_active(&root->fs_info->async_submit_wait))
wake_up(&root->fs_info->async_submit_wait);
@@ -1131,7 +1138,7 @@ static int cow_file_range_async(struct inode *inode, struct page *locked_page,
struct btrfs_root *root = BTRFS_I(inode)->root;
unsigned long nr_pages;
u64 cur_end;
- int limit = 10 * 1024 * 1024;
+ int limit = 10 * SZ_1M;
clear_extent_bit(&BTRFS_I(inode)->io_tree, start, end, EXTENT_LOCKED,
1, 0, NULL, GFP_NOFS);
@@ -1147,7 +1154,7 @@ static int cow_file_range_async(struct inode *inode, struct page *locked_page,
!btrfs_test_opt(root, FORCE_COMPRESS))
cur_end = end;
else
- cur_end = min(end, start + 512 * 1024 - 1);
+ cur_end = min(end, start + SZ_512K - 1);
async_cow->end = cur_end;
INIT_LIST_HEAD(&async_cow->extents);
@@ -1988,7 +1995,7 @@ again:
page_start = page_offset(page);
page_end = page_offset(page) + PAGE_CACHE_SIZE - 1;
- lock_extent_bits(&BTRFS_I(inode)->io_tree, page_start, page_end, 0,
+ lock_extent_bits(&BTRFS_I(inode)->io_tree, page_start, page_end,
&cached_state);
/* already ordered? We're done */
@@ -2481,7 +2488,7 @@ static noinline int relink_extent_backref(struct btrfs_path *path,
lock_start = backref->file_pos;
lock_end = backref->file_pos + backref->num_bytes - 1;
lock_extent_bits(&BTRFS_I(inode)->io_tree, lock_start, lock_end,
- 0, &cached);
+ &cached);
ordered = btrfs_lookup_first_ordered_extent(inode, lock_end);
if (ordered) {
@@ -2873,7 +2880,7 @@ static int btrfs_finish_ordered_io(struct btrfs_ordered_extent *ordered_extent)
lock_extent_bits(io_tree, ordered_extent->file_offset,
ordered_extent->file_offset + ordered_extent->len - 1,
- 0, &cached_state);
+ &cached_state);
ret = test_range_bit(io_tree, ordered_extent->file_offset,
ordered_extent->file_offset + ordered_extent->len - 1,
@@ -4339,7 +4346,7 @@ search_again:
* up a huge file in a single leaf. Most of the time that
* bytes_deleted is > 0, it will be huge by the time we get here
*/
- if (be_nice && bytes_deleted > 32 * 1024 * 1024) {
+ if (be_nice && bytes_deleted > SZ_32M) {
if (btrfs_should_end_transaction(trans, root)) {
err = -EAGAIN;
goto error;
@@ -4582,7 +4589,7 @@ error:
btrfs_free_path(path);
- if (be_nice && bytes_deleted > 32 * 1024 * 1024) {
+ if (be_nice && bytes_deleted > SZ_32M) {
unsigned long updates = trans->delayed_ref_updates;
if (updates) {
trans->delayed_ref_updates = 0;
@@ -4659,7 +4666,7 @@ again:
}
wait_on_page_writeback(page);
- lock_extent_bits(io_tree, page_start, page_end, 0, &cached_state);
+ lock_extent_bits(io_tree, page_start, page_end, &cached_state);
set_page_extent_mapped(page);
ordered = btrfs_lookup_ordered_extent(inode, page_start);
@@ -4790,7 +4797,7 @@ int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size)
while (1) {
struct btrfs_ordered_extent *ordered;
- lock_extent_bits(io_tree, hole_start, block_end - 1, 0,
+ lock_extent_bits(io_tree, hole_start, block_end - 1,
&cached_state);
ordered = btrfs_lookup_ordered_range(inode, hole_start,
block_end - hole_start);
@@ -5102,7 +5109,7 @@ static void evict_inode_truncate_pages(struct inode *inode)
end = state->end;
spin_unlock(&io_tree->lock);
- lock_extent_bits(io_tree, start, end, 0, &cached_state);
+ lock_extent_bits(io_tree, start, end, &cached_state);
/*
* If still has DELALLOC flag, the extent didn't reach disk,
@@ -5295,7 +5302,6 @@ void btrfs_evict_inode(struct inode *inode)
no_delete:
btrfs_remove_delayed_node(inode);
clear_inode(inode);
- return;
}
/*
@@ -6472,7 +6478,7 @@ out_unlock_inode:
static int btrfs_link(struct dentry *old_dentry, struct inode *dir,
struct dentry *dentry)
{
- struct btrfs_trans_handle *trans;
+ struct btrfs_trans_handle *trans = NULL;
struct btrfs_root *root = BTRFS_I(dir)->root;
struct inode *inode = d_inode(old_dentry);
u64 index;
@@ -6498,6 +6504,7 @@ static int btrfs_link(struct dentry *old_dentry, struct inode *dir,
trans = btrfs_start_transaction(root, 5);
if (IS_ERR(trans)) {
err = PTR_ERR(trans);
+ trans = NULL;
goto fail;
}
@@ -6531,9 +6538,10 @@ static int btrfs_link(struct dentry *old_dentry, struct inode *dir,
btrfs_log_new_name(trans, inode, NULL, parent);
}
- btrfs_end_transaction(trans, root);
btrfs_balance_delayed_items(root);
fail:
+ if (trans)
+ btrfs_end_transaction(trans, root);
if (drop_inode) {
inode_dec_link_count(inode);
iput(inode);
@@ -6678,7 +6686,7 @@ static int merge_extent_mapping(struct extent_map_tree *em_tree,
}
static noinline int uncompress_inline(struct btrfs_path *path,
- struct inode *inode, struct page *page,
+ struct page *page,
size_t pg_offset, u64 extent_offset,
struct btrfs_file_extent_item *item)
{
@@ -6874,8 +6882,7 @@ next:
if (create == 0 && !PageUptodate(page)) {
if (btrfs_file_extent_compression(leaf, item) !=
BTRFS_COMPRESS_NONE) {
- ret = uncompress_inline(path, inode, page,
- pg_offset,
+ ret = uncompress_inline(path, page, pg_offset,
extent_offset, item);
if (ret) {
err = ret;
@@ -7371,7 +7378,7 @@ static int lock_extent_direct(struct inode *inode, u64 lockstart, u64 lockend,
while (1) {
lock_extent_bits(&BTRFS_I(inode)->io_tree, lockstart, lockend,
- 0, cached_state);
+ cached_state);
/*
* We're concerned with the entire range that we're going to be
* doing DIO to, so we need to make sure theres no ordered
@@ -7399,25 +7406,21 @@ static int lock_extent_direct(struct inode *inode, u64 lockstart, u64 lockend,
btrfs_start_ordered_extent(inode, ordered, 1);
btrfs_put_ordered_extent(ordered);
} else {
- /* Screw you mmap */
- ret = btrfs_fdatawrite_range(inode, lockstart, lockend);
- if (ret)
- break;
- ret = filemap_fdatawait_range(inode->i_mapping,
- lockstart,
- lockend);
- if (ret)
- break;
-
/*
- * If we found a page that couldn't be invalidated just
- * fall back to buffered.
+ * We could trigger writeback for this range (and wait
+ * for it to complete) and then invalidate the pages for
+ * this range (through invalidate_inode_pages2_range()),
+ * but that can lead us to a deadlock with a concurrent
+ * call to readpages() (a buffered read or a defrag call
+ * triggered a readahead) on a page lock due to an
+ * ordered dio extent we created before but did not have
+ * yet a corresponding bio submitted (whence it can not
+ * complete), which makes readpages() wait for that
+ * ordered extent to complete while holding a lock on
+ * that page.
*/
- ret = invalidate_inode_pages2_range(inode->i_mapping,
- lockstart >> PAGE_CACHE_SHIFT,
- lockend >> PAGE_CACHE_SHIFT);
- if (ret)
- break;
+ ret = -ENOTBLK;
+ break;
}
cond_resched();
@@ -7473,11 +7476,6 @@ static struct extent_map *create_pinned_em(struct inode *inode, u64 start,
return em;
}
-struct btrfs_dio_data {
- u64 outstanding_extents;
- u64 reserve;
-};
-
static void adjust_dio_outstanding_extents(struct inode *inode,
struct btrfs_dio_data *dio_data,
const u64 len)
@@ -7661,6 +7659,7 @@ unlock:
btrfs_free_reserved_data_space(inode, start, len);
WARN_ON(dio_data->reserve < len);
dio_data->reserve -= len;
+ dio_data->unsubmitted_oe_range_end = start + len;
current->journal_info = dio_data;
}
@@ -7983,22 +7982,22 @@ static void btrfs_endio_direct_read(struct bio *bio)
bio_put(bio);
}
-static void btrfs_endio_direct_write(struct bio *bio)
+static void btrfs_endio_direct_write_update_ordered(struct inode *inode,
+ const u64 offset,
+ const u64 bytes,
+ const int uptodate)
{
- struct btrfs_dio_private *dip = bio->bi_private;
- struct inode *inode = dip->inode;
struct btrfs_root *root = BTRFS_I(inode)->root;
struct btrfs_ordered_extent *ordered = NULL;
- u64 ordered_offset = dip->logical_offset;
- u64 ordered_bytes = dip->bytes;
- struct bio *dio_bio;
+ u64 ordered_offset = offset;
+ u64 ordered_bytes = bytes;
int ret;
again:
ret = btrfs_dec_test_first_ordered_pending(inode, &ordered,
&ordered_offset,
ordered_bytes,
- !bio->bi_error);
+ uptodate);
if (!ret)
goto out_test;
@@ -8011,13 +8010,22 @@ out_test:
* our bio might span multiple ordered extents. If we haven't
* completed the accounting for the whole dio, go back and try again
*/
- if (ordered_offset < dip->logical_offset + dip->bytes) {
- ordered_bytes = dip->logical_offset + dip->bytes -
- ordered_offset;
+ if (ordered_offset < offset + bytes) {
+ ordered_bytes = offset + bytes - ordered_offset;
ordered = NULL;
goto again;
}
- dio_bio = dip->dio_bio;
+}
+
+static void btrfs_endio_direct_write(struct bio *bio)
+{
+ struct btrfs_dio_private *dip = bio->bi_private;
+ struct bio *dio_bio = dip->dio_bio;
+
+ btrfs_endio_direct_write_update_ordered(dip->inode,
+ dip->logical_offset,
+ dip->bytes,
+ !bio->bi_error);
kfree(dip);
@@ -8325,6 +8333,21 @@ static void btrfs_submit_direct(int rw, struct bio *dio_bio,
dip->subio_endio = btrfs_subio_endio_read;
}
+ /*
+ * Reset the range for unsubmitted ordered extents (to a 0 length range)
+ * even if we fail to submit a bio, because in such case we do the
+ * corresponding error handling below and it must not be done a second
+ * time by btrfs_direct_IO().
+ */
+ if (write) {
+ struct btrfs_dio_data *dio_data = current->journal_info;
+
+ dio_data->unsubmitted_oe_range_end = dip->logical_offset +
+ dip->bytes;
+ dio_data->unsubmitted_oe_range_start =
+ dio_data->unsubmitted_oe_range_end;
+ }
+
ret = btrfs_submit_direct_hook(rw, dip, skip_sum);
if (!ret)
return;
@@ -8353,24 +8376,15 @@ free_ordered:
dip = NULL;
io_bio = NULL;
} else {
- if (write) {
- struct btrfs_ordered_extent *ordered;
-
- ordered = btrfs_lookup_ordered_extent(inode,
- file_offset);
- set_bit(BTRFS_ORDERED_IOERR, &ordered->flags);
- /*
- * Decrements our ref on the ordered extent and removes
- * the ordered extent from the inode's ordered tree,
- * doing all the proper resource cleanup such as for the
- * reserved space and waking up any waiters for this
- * ordered extent (through btrfs_remove_ordered_extent).
- */
- btrfs_finish_ordered_io(ordered);
- } else {
+ if (write)
+ btrfs_endio_direct_write_update_ordered(inode,
+ file_offset,
+ dio_bio->bi_iter.bi_size,
+ 0);
+ else
unlock_extent(&BTRFS_I(inode)->io_tree, file_offset,
file_offset + dio_bio->bi_iter.bi_size - 1);
- }
+
dio_bio->bi_error = -EIO;
/*
* Releases and cleans up our dio_bio, no need to bio_put()
@@ -8470,6 +8484,8 @@ static ssize_t btrfs_direct_IO(struct kiocb *iocb, struct iov_iter *iter,
* originally calculated. Abuse current->journal_info for this.
*/
dio_data.reserve = round_up(count, root->sectorsize);
+ dio_data.unsubmitted_oe_range_start = (u64)offset;
+ dio_data.unsubmitted_oe_range_end = (u64)offset;
current->journal_info = &dio_data;
} else if (test_bit(BTRFS_INODE_READDIO_NEED_LOCK,
&BTRFS_I(inode)->runtime_flags)) {
@@ -8488,6 +8504,19 @@ static ssize_t btrfs_direct_IO(struct kiocb *iocb, struct iov_iter *iter,
if (dio_data.reserve)
btrfs_delalloc_release_space(inode, offset,
dio_data.reserve);
+ /*
+ * On error we might have left some ordered extents
+ * without submitting corresponding bios for them, so
+ * cleanup them up to avoid other tasks getting them
+ * and waiting for them to complete forever.
+ */
+ if (dio_data.unsubmitted_oe_range_start <
+ dio_data.unsubmitted_oe_range_end)
+ btrfs_endio_direct_write_update_ordered(inode,
+ dio_data.unsubmitted_oe_range_start,
+ dio_data.unsubmitted_oe_range_end -
+ dio_data.unsubmitted_oe_range_start,
+ 0);
} else if (ret >= 0 && (size_t)ret < count)
btrfs_delalloc_release_space(inode, offset,
count - (size_t)ret);
@@ -8618,7 +8647,7 @@ static void btrfs_invalidatepage(struct page *page, unsigned int offset,
}
if (!inode_evicting)
- lock_extent_bits(tree, page_start, page_end, 0, &cached_state);
+ lock_extent_bits(tree, page_start, page_end, &cached_state);
ordered = btrfs_lookup_ordered_extent(inode, page_start);
if (ordered) {
/*
@@ -8656,7 +8685,7 @@ static void btrfs_invalidatepage(struct page *page, unsigned int offset,
btrfs_put_ordered_extent(ordered);
if (!inode_evicting) {
cached_state = NULL;
- lock_extent_bits(tree, page_start, page_end, 0,
+ lock_extent_bits(tree, page_start, page_end,
&cached_state);
}
}
@@ -8754,7 +8783,7 @@ again:
}
wait_on_page_writeback(page);
- lock_extent_bits(io_tree, page_start, page_end, 0, &cached_state);
+ lock_extent_bits(io_tree, page_start, page_end, &cached_state);
set_page_extent_mapped(page);
/*
@@ -9415,14 +9444,10 @@ static void btrfs_run_delalloc_work(struct btrfs_work *work)
delalloc_work = container_of(work, struct btrfs_delalloc_work,
work);
inode = delalloc_work->inode;
- if (delalloc_work->wait) {
- btrfs_wait_ordered_range(inode, 0, (u64)-1);
- } else {
+ filemap_flush(inode->i_mapping);
+ if (test_bit(BTRFS_INODE_HAS_ASYNC_EXTENT,
+ &BTRFS_I(inode)->runtime_flags))
filemap_flush(inode->i_mapping);
- if (test_bit(BTRFS_INODE_HAS_ASYNC_EXTENT,
- &BTRFS_I(inode)->runtime_flags))
- filemap_flush(inode->i_mapping);
- }
if (delalloc_work->delay_iput)
btrfs_add_delayed_iput(inode);
@@ -9432,7 +9457,7 @@ static void btrfs_run_delalloc_work(struct btrfs_work *work)
}
struct btrfs_delalloc_work *btrfs_alloc_delalloc_work(struct inode *inode,
- int wait, int delay_iput)
+ int delay_iput)
{
struct btrfs_delalloc_work *work;
@@ -9443,7 +9468,6 @@ struct btrfs_delalloc_work *btrfs_alloc_delalloc_work(struct inode *inode,
init_completion(&work->completion);
INIT_LIST_HEAD(&work->list);
work->inode = inode;
- work->wait = wait;
work->delay_iput = delay_iput;
WARN_ON_ONCE(!inode);
btrfs_init_work(&work->work, btrfs_flush_delalloc_helper,
@@ -9491,7 +9515,7 @@ static int __start_delalloc_inodes(struct btrfs_root *root, int delay_iput,
}
spin_unlock(&root->delalloc_lock);
- work = btrfs_alloc_delalloc_work(inode, 0, delay_iput);
+ work = btrfs_alloc_delalloc_work(inode, delay_iput);
if (!work) {
if (delay_iput)
btrfs_add_delayed_iput(inode);
@@ -9633,9 +9657,11 @@ static int btrfs_symlink(struct inode *dir, struct dentry *dentry,
/*
* 2 items for inode item and ref
* 2 items for dir items
+ * 1 item for updating parent inode item
+ * 1 item for the inline extent item
* 1 item for xattr if selinux is on
*/
- trans = btrfs_start_transaction(root, 5);
+ trans = btrfs_start_transaction(root, 7);
if (IS_ERR(trans))
return PTR_ERR(trans);
@@ -9666,10 +9692,6 @@ static int btrfs_symlink(struct inode *dir, struct dentry *dentry,
if (err)
goto out_unlock_inode;
- err = btrfs_add_nondir(trans, dir, dentry, inode, 0, index);
- if (err)
- goto out_unlock_inode;
-
path = btrfs_alloc_path();
if (!path) {
err = -ENOMEM;
@@ -9706,6 +9728,13 @@ static int btrfs_symlink(struct inode *dir, struct dentry *dentry,
inode_set_bytes(inode, name_len);
btrfs_i_size_write(inode, name_len);
err = btrfs_update_inode(trans, root, inode);
+ /*
+ * Last step, add directory indexes for our symlink inode. This is the
+ * last step to avoid extra cleanup of these indexes if an error happens
+ * elsewhere above.
+ */
+ if (!err)
+ err = btrfs_add_nondir(trans, dir, dentry, inode, 0, index);
if (err) {
drop_inode = 1;
goto out_unlock_inode;
@@ -9756,7 +9785,7 @@ static int __btrfs_prealloc_file_range(struct inode *inode, int mode,
}
}
- cur_bytes = min(num_bytes, 256ULL * 1024 * 1024);
+ cur_bytes = min_t(u64, num_bytes, SZ_256M);
cur_bytes = max(cur_bytes, min_size);
/*
* If we are severely fragmented we could end up with really
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index b20463b993a6..83c9ad3f2621 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -1005,7 +1005,7 @@ static struct extent_map *defrag_lookup_extent(struct inode *inode, u64 start)
u64 end = start + len - 1;
/* get the big lock and read metadata off disk */
- lock_extent_bits(io_tree, start, end, 0, &cached);
+ lock_extent_bits(io_tree, start, end, &cached);
em = btrfs_get_extent(inode, NULL, 0, start, len, 0);
unlock_extent_cached(io_tree, start, end, &cached, GFP_NOFS);
@@ -1029,7 +1029,7 @@ static bool defrag_check_next_extent(struct inode *inode, struct extent_map *em)
if (!next || next->block_start >= EXTENT_MAP_LAST_BYTE)
ret = false;
else if ((em->block_start + em->block_len == next->block_start) &&
- (em->block_len > 128 * 1024 && next->block_len > 128 * 1024))
+ (em->block_len > SZ_128K && next->block_len > SZ_128K))
ret = false;
free_extent_map(next);
@@ -1153,7 +1153,7 @@ again:
page_end = page_start + PAGE_CACHE_SIZE - 1;
while (1) {
lock_extent_bits(tree, page_start, page_end,
- 0, &cached_state);
+ &cached_state);
ordered = btrfs_lookup_ordered_extent(inode,
page_start);
unlock_extent_cached(tree, page_start, page_end,
@@ -1213,7 +1213,7 @@ again:
page_end = page_offset(pages[i_done - 1]) + PAGE_CACHE_SIZE;
lock_extent_bits(&BTRFS_I(inode)->io_tree,
- page_start, page_end - 1, 0, &cached_state);
+ page_start, page_end - 1, &cached_state);
clear_extent_bit(&BTRFS_I(inode)->io_tree, page_start,
page_end - 1, EXTENT_DIRTY | EXTENT_DELALLOC |
EXTENT_DO_ACCOUNTING | EXTENT_DEFRAG, 0, 0,
@@ -1275,9 +1275,9 @@ int btrfs_defrag_file(struct inode *inode, struct file *file,
int defrag_count = 0;
int compress_type = BTRFS_COMPRESS_ZLIB;
u32 extent_thresh = range->extent_thresh;
- unsigned long max_cluster = (256 * 1024) >> PAGE_CACHE_SHIFT;
+ unsigned long max_cluster = SZ_256K >> PAGE_CACHE_SHIFT;
unsigned long cluster = max_cluster;
- u64 new_align = ~((u64)128 * 1024 - 1);
+ u64 new_align = ~((u64)SZ_128K - 1);
struct page **pages = NULL;
if (isize == 0)
@@ -1294,7 +1294,7 @@ int btrfs_defrag_file(struct inode *inode, struct file *file,
}
if (extent_thresh == 0)
- extent_thresh = 256 * 1024;
+ extent_thresh = SZ_256K;
/*
* if we were not given a file, allocate a readahead
@@ -1326,7 +1326,7 @@ int btrfs_defrag_file(struct inode *inode, struct file *file,
if (newer_than) {
ret = find_new_extents(root, inode, newer_than,
- &newer_off, 64 * 1024);
+ &newer_off, SZ_64K);
if (!ret) {
range->start = newer_off;
/*
@@ -1416,9 +1416,8 @@ int btrfs_defrag_file(struct inode *inode, struct file *file,
newer_off = max(newer_off + 1,
(u64)i << PAGE_CACHE_SHIFT);
- ret = find_new_extents(root, inode,
- newer_than, &newer_off,
- 64 * 1024);
+ ret = find_new_extents(root, inode, newer_than,
+ &newer_off, SZ_64K);
if (!ret) {
range->start = newer_off;
i = (newer_off & new_align) >> PAGE_CACHE_SHIFT;
@@ -1584,7 +1583,7 @@ static noinline int btrfs_ioctl_resize(struct file *file,
new_size = old_size + new_size;
}
- if (new_size < 256 * 1024 * 1024) {
+ if (new_size < SZ_256M) {
ret = -EINVAL;
goto out_free;
}
@@ -2173,7 +2172,7 @@ static noinline int btrfs_ioctl_tree_search_v2(struct file *file,
struct inode *inode;
int ret;
size_t buf_size;
- const size_t buf_limit = 16 * 1024 * 1024;
+ const size_t buf_limit = SZ_16M;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
@@ -3109,7 +3108,7 @@ out_unlock:
return ret;
}
-#define BTRFS_MAX_DEDUPE_LEN (16 * 1024 * 1024)
+#define BTRFS_MAX_DEDUPE_LEN SZ_16M
static long btrfs_ioctl_file_extent_same(struct file *file,
struct btrfs_ioctl_same_args __user *argp)
@@ -4160,7 +4159,7 @@ static long btrfs_ioctl_space_info(struct btrfs_root *root, void __user *arg)
return -ENOMEM;
space_args.total_spaces = 0;
- dest = kmalloc(alloc_size, GFP_NOFS);
+ dest = kmalloc(alloc_size, GFP_KERNEL);
if (!dest)
return -ENOMEM;
dest_orig = dest;
@@ -4537,7 +4536,7 @@ static long btrfs_ioctl_logical_to_ino(struct btrfs_root *root,
goto out;
}
- size = min_t(u32, loi->size, 64 * 1024);
+ size = min_t(u32, loi->size, SZ_64K);
inodes = init_data_container(size);
if (IS_ERR(inodes)) {
ret = PTR_ERR(inodes);
@@ -4686,7 +4685,7 @@ locked:
goto out_bargs;
}
- bctl = kzalloc(sizeof(*bctl), GFP_NOFS);
+ bctl = kzalloc(sizeof(*bctl), GFP_KERNEL);
if (!bctl) {
ret = -ENOMEM;
goto out_bargs;
@@ -4772,7 +4771,7 @@ static long btrfs_ioctl_balance_progress(struct btrfs_root *root,
goto out;
}
- bargs = kzalloc(sizeof(*bargs), GFP_NOFS);
+ bargs = kzalloc(sizeof(*bargs), GFP_KERNEL);
if (!bargs) {
ret = -ENOMEM;
goto out;
@@ -5032,7 +5031,7 @@ static long btrfs_ioctl_quota_rescan_status(struct file *file, void __user *arg)
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
- qsa = kzalloc(sizeof(*qsa), GFP_NOFS);
+ qsa = kzalloc(sizeof(*qsa), GFP_KERNEL);
if (!qsa)
return -ENOMEM;
@@ -5162,7 +5161,7 @@ static long btrfs_ioctl_set_received_subvol_32(struct file *file,
goto out;
}
- args64 = kmalloc(sizeof(*args64), GFP_NOFS);
+ args64 = kmalloc(sizeof(*args64), GFP_KERNEL);
if (!args64) {
ret = -ENOMEM;
goto out;
diff --git a/fs/btrfs/locking.c b/fs/btrfs/locking.c
index 8077461fc56a..d13128c70ddd 100644
--- a/fs/btrfs/locking.c
+++ b/fs/btrfs/locking.c
@@ -56,7 +56,6 @@ void btrfs_set_lock_blocking_rw(struct extent_buffer *eb, int rw)
atomic_dec(&eb->spinning_readers);
read_unlock(&eb->lock);
}
- return;
}
/*
@@ -96,7 +95,6 @@ void btrfs_clear_lock_blocking_rw(struct extent_buffer *eb, int rw)
waitqueue_active(&eb->read_lock_wq))
wake_up(&eb->read_lock_wq);
}
- return;
}
/*
diff --git a/fs/btrfs/raid56.c b/fs/btrfs/raid56.c
index 1a33d3eb36de..6d707545f775 100644
--- a/fs/btrfs/raid56.c
+++ b/fs/btrfs/raid56.c
@@ -503,7 +503,6 @@ static void cache_rbio(struct btrfs_raid_bio *rbio)
}
spin_unlock_irqrestore(&table->cache_lock, flags);
- return;
}
/*
@@ -906,7 +905,6 @@ static void raid_write_end_io(struct bio *bio)
err = -EIO;
rbio_orig_end_io(rbio, err);
- return;
}
/*
diff --git a/fs/btrfs/scrub.c b/fs/btrfs/scrub.c
index 143f2b7a8edf..681db07f25ea 100644
--- a/fs/btrfs/scrub.c
+++ b/fs/btrfs/scrub.c
@@ -1514,8 +1514,6 @@ static void scrub_recheck_block(struct btrfs_fs_info *fs_info,
if (sblock->no_io_error_seen)
scrub_recheck_block_checksum(sblock);
-
- return;
}
static inline int scrub_check_fsid(u8 fsid[],
@@ -3460,7 +3458,7 @@ static noinline_for_stack int scrub_chunk(struct scrub_ctx *sctx,
return ret;
}
- map = (struct map_lookup *)em->bdev;
+ map = em->map_lookup;
if (em->start != chunk_offset)
goto out;
@@ -4211,7 +4209,7 @@ static int check_extent_to_block(struct inode *inode, u64 start, u64 len,
io_tree = &BTRFS_I(inode)->io_tree;
- lock_extent_bits(io_tree, lockstart, lockend, 0, &cached_state);
+ lock_extent_bits(io_tree, lockstart, lockend, &cached_state);
ordered = btrfs_lookup_ordered_range(inode, lockstart, len);
if (ordered) {
btrfs_put_ordered_extent(ordered);
diff --git a/fs/btrfs/send.c b/fs/btrfs/send.c
index 355a458cba1a..63a6152be04b 100644
--- a/fs/btrfs/send.c
+++ b/fs/btrfs/send.c
@@ -1469,7 +1469,21 @@ static int read_symlink(struct btrfs_root *root,
ret = btrfs_search_slot(NULL, root, &key, path, 0, 0);
if (ret < 0)
goto out;
- BUG_ON(ret);
+ if (ret) {
+ /*
+ * An empty symlink inode. Can happen in rare error paths when
+ * creating a symlink (transaction committed before the inode
+ * eviction handler removed the symlink inode items and a crash
+ * happened in between or the subvol was snapshoted in between).
+ * Print an informative message to dmesg/syslog so that the user
+ * can delete the symlink.
+ */
+ btrfs_err(root->fs_info,
+ "Found empty symlink inode %llu at root %llu",
+ ino, root->root_key.objectid);
+ ret = -EIO;
+ goto out;
+ }
ei = btrfs_item_ptr(path->nodes[0], path->slots[0],
struct btrfs_file_extent_item);
diff --git a/fs/btrfs/send.h b/fs/btrfs/send.h
index 48d425aef05b..02e00166c4da 100644
--- a/fs/btrfs/send.h
+++ b/fs/btrfs/send.h
@@ -22,8 +22,8 @@
#define BTRFS_SEND_STREAM_MAGIC "btrfs-stream"
#define BTRFS_SEND_STREAM_VERSION 1
-#define BTRFS_SEND_BUF_SIZE (1024 * 64)
-#define BTRFS_SEND_READ_SIZE (1024 * 48)
+#define BTRFS_SEND_BUF_SIZE SZ_64K
+#define BTRFS_SEND_READ_SIZE (48 * SZ_1K)
enum btrfs_tlv_type {
BTRFS_TLV_U8,
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 3225ac365408..a8e049ae933d 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -295,10 +295,11 @@ enum {
Opt_nossd, Opt_ssd_spread, Opt_thread_pool, Opt_noacl, Opt_compress,
Opt_compress_type, Opt_compress_force, Opt_compress_force_type,
Opt_notreelog, Opt_ratio, Opt_flushoncommit, Opt_discard,
- Opt_space_cache, Opt_clear_cache, Opt_user_subvol_rm_allowed,
- Opt_enospc_debug, Opt_subvolrootid, Opt_defrag, Opt_inode_cache,
- Opt_no_space_cache, Opt_recovery, Opt_skip_balance,
- Opt_check_integrity, Opt_check_integrity_including_extent_data,
+ Opt_space_cache, Opt_space_cache_version, Opt_clear_cache,
+ Opt_user_subvol_rm_allowed, Opt_enospc_debug, Opt_subvolrootid,
+ Opt_defrag, Opt_inode_cache, Opt_no_space_cache, Opt_recovery,
+ Opt_skip_balance, Opt_check_integrity,
+ Opt_check_integrity_including_extent_data,
Opt_check_integrity_print_mask, Opt_fatal_errors, Opt_rescan_uuid_tree,
Opt_commit_interval, Opt_barrier, Opt_nodefrag, Opt_nodiscard,
Opt_noenospc_debug, Opt_noflushoncommit, Opt_acl, Opt_datacow,
@@ -340,6 +341,7 @@ static const match_table_t tokens = {
{Opt_discard, "discard"},
{Opt_nodiscard, "nodiscard"},
{Opt_space_cache, "space_cache"},
+ {Opt_space_cache_version, "space_cache=%s"},
{Opt_clear_cache, "clear_cache"},
{Opt_user_subvol_rm_allowed, "user_subvol_rm_allowed"},
{Opt_enospc_debug, "enospc_debug"},
@@ -386,7 +388,9 @@ int btrfs_parse_options(struct btrfs_root *root, char *options)
int no_compress = 0;
cache_gen = btrfs_super_cache_generation(root->fs_info->super_copy);
- if (cache_gen)
+ if (btrfs_fs_compat_ro(root->fs_info, FREE_SPACE_TREE))
+ btrfs_set_opt(info->mount_opt, FREE_SPACE_TREE);
+ else if (cache_gen)
btrfs_set_opt(info->mount_opt, SPACE_CACHE);
if (!options)
@@ -632,15 +636,35 @@ int btrfs_parse_options(struct btrfs_root *root, char *options)
"turning off discard");
break;
case Opt_space_cache:
- btrfs_set_and_info(root, SPACE_CACHE,
- "enabling disk space caching");
+ case Opt_space_cache_version:
+ if (token == Opt_space_cache ||
+ strcmp(args[0].from, "v1") == 0) {
+ btrfs_clear_opt(root->fs_info->mount_opt,
+ FREE_SPACE_TREE);
+ btrfs_set_and_info(root, SPACE_CACHE,
+ "enabling disk space caching");
+ } else if (strcmp(args[0].from, "v2") == 0) {
+ btrfs_clear_opt(root->fs_info->mount_opt,
+ SPACE_CACHE);
+ btrfs_set_and_info(root, FREE_SPACE_TREE,
+ "enabling free space tree");
+ } else {
+ ret = -EINVAL;
+ goto out;
+ }
break;
case Opt_rescan_uuid_tree:
btrfs_set_opt(info->mount_opt, RESCAN_UUID_TREE);
break;
case Opt_no_space_cache:
- btrfs_clear_and_info(root, SPACE_CACHE,
- "disabling disk space caching");
+ if (btrfs_test_opt(root, SPACE_CACHE)) {
+ btrfs_clear_and_info(root, SPACE_CACHE,
+ "disabling disk space caching");
+ }
+ if (btrfs_test_opt(root, FREE_SPACE_TREE)) {
+ btrfs_clear_and_info(root, FREE_SPACE_TREE,
+ "disabling free space tree");
+ }
break;
case Opt_inode_cache:
btrfs_set_pending_and_info(info, INODE_MAP_CACHE,
@@ -769,8 +793,17 @@ int btrfs_parse_options(struct btrfs_root *root, char *options)
}
}
out:
+ if (btrfs_fs_compat_ro(root->fs_info, FREE_SPACE_TREE) &&
+ !btrfs_test_opt(root, FREE_SPACE_TREE) &&
+ !btrfs_test_opt(root, CLEAR_CACHE)) {
+ btrfs_err(root->fs_info, "cannot disable free space tree");
+ ret = -EINVAL;
+
+ }
if (!ret && btrfs_test_opt(root, SPACE_CACHE))
btrfs_info(root->fs_info, "disk space caching is enabled");
+ if (!ret && btrfs_test_opt(root, FREE_SPACE_TREE))
+ btrfs_info(root->fs_info, "using free space tree");
kfree(orig);
return ret;
}
@@ -1177,6 +1210,8 @@ static int btrfs_show_options(struct seq_file *seq, struct dentry *dentry)
seq_puts(seq, ",noacl");
if (btrfs_test_opt(root, SPACE_CACHE))
seq_puts(seq, ",space_cache");
+ else if (btrfs_test_opt(root, FREE_SPACE_TREE))
+ seq_puts(seq, ",space_cache=v2");
else
seq_puts(seq, ",nospace_cache");
if (btrfs_test_opt(root, RESCAN_UUID_TREE))
@@ -1880,7 +1915,7 @@ static int btrfs_calc_avail_data_space(struct btrfs_root *root, u64 *free_bytes)
* btrfs starts at an offset of at least 1MB when doing chunk
* allocation.
*/
- skip_space = 1024 * 1024;
+ skip_space = SZ_1M;
/* user can set the offset in fs_info->alloc_start. */
if (fs_info->alloc_start &&
@@ -2264,6 +2299,9 @@ static int btrfs_run_sanity_tests(void)
if (ret)
goto out;
ret = btrfs_test_qgroups();
+ if (ret)
+ goto out;
+ ret = btrfs_test_free_space_tree();
out:
btrfs_destroy_test_fs();
return ret;
diff --git a/fs/btrfs/tests/btrfs-tests.c b/fs/btrfs/tests/btrfs-tests.c
index 9626252ee6b4..b1d920b30070 100644
--- a/fs/btrfs/tests/btrfs-tests.c
+++ b/fs/btrfs/tests/btrfs-tests.c
@@ -21,6 +21,9 @@
#include <linux/magic.h>
#include "btrfs-tests.h"
#include "../ctree.h"
+#include "../free-space-cache.h"
+#include "../free-space-tree.h"
+#include "../transaction.h"
#include "../volumes.h"
#include "../disk-io.h"
#include "../qgroup.h"
@@ -122,6 +125,9 @@ struct btrfs_fs_info *btrfs_alloc_dummy_fs_info(void)
INIT_LIST_HEAD(&fs_info->tree_mod_seq_list);
INIT_RADIX_TREE(&fs_info->buffer_radix, GFP_ATOMIC);
INIT_RADIX_TREE(&fs_info->fs_roots_radix, GFP_ATOMIC);
+ extent_io_tree_init(&fs_info->freed_extents[0], NULL);
+ extent_io_tree_init(&fs_info->freed_extents[1], NULL);
+ fs_info->pinned_extents = &fs_info->freed_extents[0];
return fs_info;
}
@@ -169,3 +175,55 @@ void btrfs_free_dummy_root(struct btrfs_root *root)
kfree(root);
}
+struct btrfs_block_group_cache *
+btrfs_alloc_dummy_block_group(unsigned long length)
+{
+ struct btrfs_block_group_cache *cache;
+
+ cache = kzalloc(sizeof(*cache), GFP_NOFS);
+ if (!cache)
+ return NULL;
+ cache->free_space_ctl = kzalloc(sizeof(*cache->free_space_ctl),
+ GFP_NOFS);
+ if (!cache->free_space_ctl) {
+ kfree(cache);
+ return NULL;
+ }
+ cache->fs_info = btrfs_alloc_dummy_fs_info();
+ if (!cache->fs_info) {
+ kfree(cache->free_space_ctl);
+ kfree(cache);
+ return NULL;
+ }
+
+ cache->key.objectid = 0;
+ cache->key.offset = length;
+ cache->key.type = BTRFS_BLOCK_GROUP_ITEM_KEY;
+ cache->sectorsize = 4096;
+ cache->full_stripe_len = 4096;
+
+ INIT_LIST_HEAD(&cache->list);
+ INIT_LIST_HEAD(&cache->cluster_list);
+ INIT_LIST_HEAD(&cache->bg_list);
+ btrfs_init_free_space_ctl(cache);
+ mutex_init(&cache->free_space_lock);
+
+ return cache;
+}
+
+void btrfs_free_dummy_block_group(struct btrfs_block_group_cache *cache)
+{
+ if (!cache)
+ return;
+ __btrfs_remove_free_space_cache(cache->free_space_ctl);
+ kfree(cache->free_space_ctl);
+ kfree(cache);
+}
+
+void btrfs_init_dummy_trans(struct btrfs_trans_handle *trans)
+{
+ memset(trans, 0, sizeof(*trans));
+ trans->transid = 1;
+ INIT_LIST_HEAD(&trans->qgroup_ref_list);
+ trans->type = __TRANS_DUMMY;
+}
diff --git a/fs/btrfs/tests/btrfs-tests.h b/fs/btrfs/tests/btrfs-tests.h
index fd3954224480..054b8c73c951 100644
--- a/fs/btrfs/tests/btrfs-tests.h
+++ b/fs/btrfs/tests/btrfs-tests.h
@@ -24,17 +24,23 @@
#define test_msg(fmt, ...) pr_info("BTRFS: selftest: " fmt, ##__VA_ARGS__)
struct btrfs_root;
+struct btrfs_trans_handle;
int btrfs_test_free_space_cache(void);
int btrfs_test_extent_buffer_operations(void);
int btrfs_test_extent_io(void);
int btrfs_test_inodes(void);
int btrfs_test_qgroups(void);
+int btrfs_test_free_space_tree(void);
int btrfs_init_test_fs(void);
void btrfs_destroy_test_fs(void);
struct inode *btrfs_new_test_inode(void);
struct btrfs_fs_info *btrfs_alloc_dummy_fs_info(void);
void btrfs_free_dummy_root(struct btrfs_root *root);
+struct btrfs_block_group_cache *
+btrfs_alloc_dummy_block_group(unsigned long length);
+void btrfs_free_dummy_block_group(struct btrfs_block_group_cache *cache);
+void btrfs_init_dummy_trans(struct btrfs_trans_handle *trans);
#else
static inline int btrfs_test_free_space_cache(void)
{
@@ -63,6 +69,10 @@ static inline int btrfs_test_qgroups(void)
{
return 0;
}
+static inline int btrfs_test_free_space_tree(void)
+{
+ return 0;
+}
#endif
#endif
diff --git a/fs/btrfs/tests/extent-io-tests.c b/fs/btrfs/tests/extent-io-tests.c
index 9e9f2368177d..e29fa297e053 100644
--- a/fs/btrfs/tests/extent-io-tests.c
+++ b/fs/btrfs/tests/extent-io-tests.c
@@ -18,6 +18,8 @@
#include <linux/pagemap.h>
#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/sizes.h>
#include "btrfs-tests.h"
#include "../extent_io.h"
@@ -70,12 +72,14 @@ static int test_find_delalloc(void)
struct page *page;
struct page *locked_page = NULL;
unsigned long index = 0;
- u64 total_dirty = 256 * 1024 * 1024;
- u64 max_bytes = 128 * 1024 * 1024;
+ u64 total_dirty = SZ_256M;
+ u64 max_bytes = SZ_128M;
u64 start, end, test_start;
u64 found;
int ret = -EINVAL;
+ test_msg("Running find delalloc tests\n");
+
inode = btrfs_new_test_inode();
if (!inode) {
test_msg("Failed to allocate test inode\n");
@@ -133,7 +137,7 @@ static int test_find_delalloc(void)
* |--- delalloc ---|
* |--- search ---|
*/
- test_start = 64 * 1024 * 1024;
+ test_start = SZ_64M;
locked_page = find_lock_page(inode->i_mapping,
test_start >> PAGE_CACHE_SHIFT);
if (!locked_page) {
@@ -220,8 +224,8 @@ static int test_find_delalloc(void)
* Now to test where we run into a page that is no longer dirty in the
* range we want to find.
*/
- page = find_get_page(inode->i_mapping, (max_bytes + (1 * 1024 * 1024))
- >> PAGE_CACHE_SHIFT);
+ page = find_get_page(inode->i_mapping,
+ (max_bytes + SZ_1M) >> PAGE_CACHE_SHIFT);
if (!page) {
test_msg("Couldn't find our page\n");
goto out_bits;
@@ -268,8 +272,139 @@ out:
return ret;
}
+static int __test_eb_bitmaps(unsigned long *bitmap, struct extent_buffer *eb,
+ unsigned long len)
+{
+ unsigned long i, x;
+
+ memset(bitmap, 0, len);
+ memset_extent_buffer(eb, 0, 0, len);
+ if (memcmp_extent_buffer(eb, bitmap, 0, len) != 0) {
+ test_msg("Bitmap was not zeroed\n");
+ return -EINVAL;
+ }
+
+ bitmap_set(bitmap, 0, len * BITS_PER_BYTE);
+ extent_buffer_bitmap_set(eb, 0, 0, len * BITS_PER_BYTE);
+ if (memcmp_extent_buffer(eb, bitmap, 0, len) != 0) {
+ test_msg("Setting all bits failed\n");
+ return -EINVAL;
+ }
+
+ bitmap_clear(bitmap, 0, len * BITS_PER_BYTE);
+ extent_buffer_bitmap_clear(eb, 0, 0, len * BITS_PER_BYTE);
+ if (memcmp_extent_buffer(eb, bitmap, 0, len) != 0) {
+ test_msg("Clearing all bits failed\n");
+ return -EINVAL;
+ }
+
+ bitmap_set(bitmap, (PAGE_CACHE_SIZE - sizeof(long) / 2) * BITS_PER_BYTE,
+ sizeof(long) * BITS_PER_BYTE);
+ extent_buffer_bitmap_set(eb, PAGE_CACHE_SIZE - sizeof(long) / 2, 0,
+ sizeof(long) * BITS_PER_BYTE);
+ if (memcmp_extent_buffer(eb, bitmap, 0, len) != 0) {
+ test_msg("Setting straddling pages failed\n");
+ return -EINVAL;
+ }
+
+ bitmap_set(bitmap, 0, len * BITS_PER_BYTE);
+ bitmap_clear(bitmap,
+ (PAGE_CACHE_SIZE - sizeof(long) / 2) * BITS_PER_BYTE,
+ sizeof(long) * BITS_PER_BYTE);
+ extent_buffer_bitmap_set(eb, 0, 0, len * BITS_PER_BYTE);
+ extent_buffer_bitmap_clear(eb, PAGE_CACHE_SIZE - sizeof(long) / 2, 0,
+ sizeof(long) * BITS_PER_BYTE);
+ if (memcmp_extent_buffer(eb, bitmap, 0, len) != 0) {
+ test_msg("Clearing straddling pages failed\n");
+ return -EINVAL;
+ }
+
+ /*
+ * Generate a wonky pseudo-random bit pattern for the sake of not using
+ * something repetitive that could miss some hypothetical off-by-n bug.
+ */
+ x = 0;
+ for (i = 0; i < len / sizeof(long); i++) {
+ x = (0x19660dULL * (u64)x + 0x3c6ef35fULL) & 0xffffffffUL;
+ bitmap[i] = x;
+ }
+ write_extent_buffer(eb, bitmap, 0, len);
+
+ for (i = 0; i < len * BITS_PER_BYTE; i++) {
+ int bit, bit1;
+
+ bit = !!test_bit(i, bitmap);
+ bit1 = !!extent_buffer_test_bit(eb, 0, i);
+ if (bit1 != bit) {
+ test_msg("Testing bit pattern failed\n");
+ return -EINVAL;
+ }
+
+ bit1 = !!extent_buffer_test_bit(eb, i / BITS_PER_BYTE,
+ i % BITS_PER_BYTE);
+ if (bit1 != bit) {
+ test_msg("Testing bit pattern with offset failed\n");
+ return -EINVAL;
+ }
+ }
+
+ return 0;
+}
+
+static int test_eb_bitmaps(void)
+{
+ unsigned long len = PAGE_CACHE_SIZE * 4;
+ unsigned long *bitmap;
+ struct extent_buffer *eb;
+ int ret;
+
+ test_msg("Running extent buffer bitmap tests\n");
+
+ bitmap = kmalloc(len, GFP_NOFS);
+ if (!bitmap) {
+ test_msg("Couldn't allocate test bitmap\n");
+ return -ENOMEM;
+ }
+
+ eb = __alloc_dummy_extent_buffer(NULL, 0, len);
+ if (!eb) {
+ test_msg("Couldn't allocate test extent buffer\n");
+ kfree(bitmap);
+ return -ENOMEM;
+ }
+
+ ret = __test_eb_bitmaps(bitmap, eb, len);
+ if (ret)
+ goto out;
+
+ /* Do it over again with an extent buffer which isn't page-aligned. */
+ free_extent_buffer(eb);
+ eb = __alloc_dummy_extent_buffer(NULL, PAGE_CACHE_SIZE / 2, len);
+ if (!eb) {
+ test_msg("Couldn't allocate test extent buffer\n");
+ kfree(bitmap);
+ return -ENOMEM;
+ }
+
+ ret = __test_eb_bitmaps(bitmap, eb, len);
+out:
+ free_extent_buffer(eb);
+ kfree(bitmap);
+ return ret;
+}
+
int btrfs_test_extent_io(void)
{
- test_msg("Running find delalloc tests\n");
- return test_find_delalloc();
+ int ret;
+
+ test_msg("Running extent I/O tests\n");
+
+ ret = test_find_delalloc();
+ if (ret)
+ goto out;
+
+ ret = test_eb_bitmaps();
+out:
+ test_msg("Extent I/O tests finished\n");
+ return ret;
}
diff --git a/fs/btrfs/tests/free-space-tests.c b/fs/btrfs/tests/free-space-tests.c
index 69a11e63d668..c9ad97b1e690 100644
--- a/fs/btrfs/tests/free-space-tests.c
+++ b/fs/btrfs/tests/free-space-tests.c
@@ -23,41 +23,6 @@
#include "../free-space-cache.h"
#define BITS_PER_BITMAP (PAGE_CACHE_SIZE * 8)
-static struct btrfs_block_group_cache *init_test_block_group(void)
-{
- struct btrfs_block_group_cache *cache;
-
- cache = kzalloc(sizeof(*cache), GFP_NOFS);
- if (!cache)
- return NULL;
- cache->free_space_ctl = kzalloc(sizeof(*cache->free_space_ctl),
- GFP_NOFS);
- if (!cache->free_space_ctl) {
- kfree(cache);
- return NULL;
- }
- cache->fs_info = btrfs_alloc_dummy_fs_info();
- if (!cache->fs_info) {
- kfree(cache->free_space_ctl);
- kfree(cache);
- return NULL;
- }
-
- cache->key.objectid = 0;
- cache->key.offset = 1024 * 1024 * 1024;
- cache->key.type = BTRFS_BLOCK_GROUP_ITEM_KEY;
- cache->sectorsize = 4096;
- cache->full_stripe_len = 4096;
-
- spin_lock_init(&cache->lock);
- INIT_LIST_HEAD(&cache->list);
- INIT_LIST_HEAD(&cache->cluster_list);
- INIT_LIST_HEAD(&cache->bg_list);
-
- btrfs_init_free_space_ctl(cache);
-
- return cache;
-}
/*
* This test just does basic sanity checking, making sure we can add an exten
@@ -71,59 +36,59 @@ static int test_extents(struct btrfs_block_group_cache *cache)
test_msg("Running extent only tests\n");
/* First just make sure we can remove an entire entry */
- ret = btrfs_add_free_space(cache, 0, 4 * 1024 * 1024);
+ ret = btrfs_add_free_space(cache, 0, SZ_4M);
if (ret) {
test_msg("Error adding initial extents %d\n", ret);
return ret;
}
- ret = btrfs_remove_free_space(cache, 0, 4 * 1024 * 1024);
+ ret = btrfs_remove_free_space(cache, 0, SZ_4M);
if (ret) {
test_msg("Error removing extent %d\n", ret);
return ret;
}
- if (test_check_exists(cache, 0, 4 * 1024 * 1024)) {
+ if (test_check_exists(cache, 0, SZ_4M)) {
test_msg("Full remove left some lingering space\n");
return -1;
}
/* Ok edge and middle cases now */
- ret = btrfs_add_free_space(cache, 0, 4 * 1024 * 1024);
+ ret = btrfs_add_free_space(cache, 0, SZ_4M);
if (ret) {
test_msg("Error adding half extent %d\n", ret);
return ret;
}
- ret = btrfs_remove_free_space(cache, 3 * 1024 * 1024, 1 * 1024 * 1024);
+ ret = btrfs_remove_free_space(cache, 3 * SZ_1M, SZ_1M);
if (ret) {
test_msg("Error removing tail end %d\n", ret);
return ret;
}
- ret = btrfs_remove_free_space(cache, 0, 1 * 1024 * 1024);
+ ret = btrfs_remove_free_space(cache, 0, SZ_1M);
if (ret) {
test_msg("Error removing front end %d\n", ret);
return ret;
}
- ret = btrfs_remove_free_space(cache, 2 * 1024 * 1024, 4096);
+ ret = btrfs_remove_free_space(cache, SZ_2M, 4096);
if (ret) {
test_msg("Error removing middle piece %d\n", ret);
return ret;
}
- if (test_check_exists(cache, 0, 1 * 1024 * 1024)) {
+ if (test_check_exists(cache, 0, SZ_1M)) {
test_msg("Still have space at the front\n");
return -1;
}
- if (test_check_exists(cache, 2 * 1024 * 1024, 4096)) {
+ if (test_check_exists(cache, SZ_2M, 4096)) {
test_msg("Still have space in the middle\n");
return -1;
}
- if (test_check_exists(cache, 3 * 1024 * 1024, 1 * 1024 * 1024)) {
+ if (test_check_exists(cache, 3 * SZ_1M, SZ_1M)) {
test_msg("Still have space at the end\n");
return -1;
}
@@ -141,30 +106,30 @@ static int test_bitmaps(struct btrfs_block_group_cache *cache)
test_msg("Running bitmap only tests\n");
- ret = test_add_free_space_entry(cache, 0, 4 * 1024 * 1024, 1);
+ ret = test_add_free_space_entry(cache, 0, SZ_4M, 1);
if (ret) {
test_msg("Couldn't create a bitmap entry %d\n", ret);
return ret;
}
- ret = btrfs_remove_free_space(cache, 0, 4 * 1024 * 1024);
+ ret = btrfs_remove_free_space(cache, 0, SZ_4M);
if (ret) {
test_msg("Error removing bitmap full range %d\n", ret);
return ret;
}
- if (test_check_exists(cache, 0, 4 * 1024 * 1024)) {
+ if (test_check_exists(cache, 0, SZ_4M)) {
test_msg("Left some space in bitmap\n");
return -1;
}
- ret = test_add_free_space_entry(cache, 0, 4 * 1024 * 1024, 1);
+ ret = test_add_free_space_entry(cache, 0, SZ_4M, 1);
if (ret) {
test_msg("Couldn't add to our bitmap entry %d\n", ret);
return ret;
}
- ret = btrfs_remove_free_space(cache, 1 * 1024 * 1024, 2 * 1024 * 1024);
+ ret = btrfs_remove_free_space(cache, SZ_1M, SZ_2M);
if (ret) {
test_msg("Couldn't remove middle chunk %d\n", ret);
return ret;
@@ -177,23 +142,21 @@ static int test_bitmaps(struct btrfs_block_group_cache *cache)
next_bitmap_offset = (u64)(BITS_PER_BITMAP * 4096);
/* Test a bit straddling two bitmaps */
- ret = test_add_free_space_entry(cache, next_bitmap_offset -
- (2 * 1024 * 1024), 4 * 1024 * 1024, 1);
+ ret = test_add_free_space_entry(cache, next_bitmap_offset - SZ_2M,
+ SZ_4M, 1);
if (ret) {
test_msg("Couldn't add space that straddles two bitmaps %d\n",
ret);
return ret;
}
- ret = btrfs_remove_free_space(cache, next_bitmap_offset -
- (1 * 1024 * 1024), 2 * 1024 * 1024);
+ ret = btrfs_remove_free_space(cache, next_bitmap_offset - SZ_1M, SZ_2M);
if (ret) {
test_msg("Couldn't remove overlapping space %d\n", ret);
return ret;
}
- if (test_check_exists(cache, next_bitmap_offset - (1 * 1024 * 1024),
- 2 * 1024 * 1024)) {
+ if (test_check_exists(cache, next_bitmap_offset - SZ_1M, SZ_2M)) {
test_msg("Left some space when removing overlapping\n");
return -1;
}
@@ -216,43 +179,43 @@ static int test_bitmaps_and_extents(struct btrfs_block_group_cache *cache)
* bitmap, but the free space completely in the extent and then
* completely in the bitmap.
*/
- ret = test_add_free_space_entry(cache, 4 * 1024 * 1024, 1 * 1024 * 1024, 1);
+ ret = test_add_free_space_entry(cache, SZ_4M, SZ_1M, 1);
if (ret) {
test_msg("Couldn't create bitmap entry %d\n", ret);
return ret;
}
- ret = test_add_free_space_entry(cache, 0, 1 * 1024 * 1024, 0);
+ ret = test_add_free_space_entry(cache, 0, SZ_1M, 0);
if (ret) {
test_msg("Couldn't add extent entry %d\n", ret);
return ret;
}
- ret = btrfs_remove_free_space(cache, 0, 1 * 1024 * 1024);
+ ret = btrfs_remove_free_space(cache, 0, SZ_1M);
if (ret) {
test_msg("Couldn't remove extent entry %d\n", ret);
return ret;
}
- if (test_check_exists(cache, 0, 1 * 1024 * 1024)) {
+ if (test_check_exists(cache, 0, SZ_1M)) {
test_msg("Left remnants after our remove\n");
return -1;
}
/* Now to add back the extent entry and remove from the bitmap */
- ret = test_add_free_space_entry(cache, 0, 1 * 1024 * 1024, 0);
+ ret = test_add_free_space_entry(cache, 0, SZ_1M, 0);
if (ret) {
test_msg("Couldn't re-add extent entry %d\n", ret);
return ret;
}
- ret = btrfs_remove_free_space(cache, 4 * 1024 * 1024, 1 * 1024 * 1024);
+ ret = btrfs_remove_free_space(cache, SZ_4M, SZ_1M);
if (ret) {
test_msg("Couldn't remove from bitmap %d\n", ret);
return ret;
}
- if (test_check_exists(cache, 4 * 1024 * 1024, 1 * 1024 * 1024)) {
+ if (test_check_exists(cache, SZ_4M, SZ_1M)) {
test_msg("Left remnants in the bitmap\n");
return -1;
}
@@ -261,19 +224,19 @@ static int test_bitmaps_and_extents(struct btrfs_block_group_cache *cache)
* Ok so a little more evil, extent entry and bitmap at the same offset,
* removing an overlapping chunk.
*/
- ret = test_add_free_space_entry(cache, 1 * 1024 * 1024, 4 * 1024 * 1024, 1);
+ ret = test_add_free_space_entry(cache, SZ_1M, SZ_4M, 1);
if (ret) {
test_msg("Couldn't add to a bitmap %d\n", ret);
return ret;
}
- ret = btrfs_remove_free_space(cache, 512 * 1024, 3 * 1024 * 1024);
+ ret = btrfs_remove_free_space(cache, SZ_512K, 3 * SZ_1M);
if (ret) {
test_msg("Couldn't remove overlapping space %d\n", ret);
return ret;
}
- if (test_check_exists(cache, 512 * 1024, 3 * 1024 * 1024)) {
+ if (test_check_exists(cache, SZ_512K, 3 * SZ_1M)) {
test_msg("Left over pieces after removing overlapping\n");
return -1;
}
@@ -281,25 +244,25 @@ static int test_bitmaps_and_extents(struct btrfs_block_group_cache *cache)
__btrfs_remove_free_space_cache(cache->free_space_ctl);
/* Now with the extent entry offset into the bitmap */
- ret = test_add_free_space_entry(cache, 4 * 1024 * 1024, 4 * 1024 * 1024, 1);
+ ret = test_add_free_space_entry(cache, SZ_4M, SZ_4M, 1);
if (ret) {
test_msg("Couldn't add space to the bitmap %d\n", ret);
return ret;
}
- ret = test_add_free_space_entry(cache, 2 * 1024 * 1024, 2 * 1024 * 1024, 0);
+ ret = test_add_free_space_entry(cache, SZ_2M, SZ_2M, 0);
if (ret) {
test_msg("Couldn't add extent to the cache %d\n", ret);
return ret;
}
- ret = btrfs_remove_free_space(cache, 3 * 1024 * 1024, 4 * 1024 * 1024);
+ ret = btrfs_remove_free_space(cache, 3 * SZ_1M, SZ_4M);
if (ret) {
test_msg("Problem removing overlapping space %d\n", ret);
return ret;
}
- if (test_check_exists(cache, 3 * 1024 * 1024, 4 * 1024 * 1024)) {
+ if (test_check_exists(cache, 3 * SZ_1M, SZ_4M)) {
test_msg("Left something behind when removing space");
return -1;
}
@@ -315,29 +278,26 @@ static int test_bitmaps_and_extents(struct btrfs_block_group_cache *cache)
* [ del ]
*/
__btrfs_remove_free_space_cache(cache->free_space_ctl);
- ret = test_add_free_space_entry(cache, bitmap_offset + 4 * 1024 * 1024,
- 4 * 1024 * 1024, 1);
+ ret = test_add_free_space_entry(cache, bitmap_offset + SZ_4M, SZ_4M, 1);
if (ret) {
test_msg("Couldn't add bitmap %d\n", ret);
return ret;
}
- ret = test_add_free_space_entry(cache, bitmap_offset - 1 * 1024 * 1024,
- 5 * 1024 * 1024, 0);
+ ret = test_add_free_space_entry(cache, bitmap_offset - SZ_1M,
+ 5 * SZ_1M, 0);
if (ret) {
test_msg("Couldn't add extent entry %d\n", ret);
return ret;
}
- ret = btrfs_remove_free_space(cache, bitmap_offset + 1 * 1024 * 1024,
- 5 * 1024 * 1024);
+ ret = btrfs_remove_free_space(cache, bitmap_offset + SZ_1M, 5 * SZ_1M);
if (ret) {
test_msg("Failed to free our space %d\n", ret);
return ret;
}
- if (test_check_exists(cache, bitmap_offset + 1 * 1024 * 1024,
- 5 * 1024 * 1024)) {
+ if (test_check_exists(cache, bitmap_offset + SZ_1M, 5 * SZ_1M)) {
test_msg("Left stuff over\n");
return -1;
}
@@ -350,19 +310,19 @@ static int test_bitmaps_and_extents(struct btrfs_block_group_cache *cache)
* to return -EAGAIN back from btrfs_remove_extent, make sure this
* doesn't happen.
*/
- ret = test_add_free_space_entry(cache, 1 * 1024 * 1024, 2 * 1024 * 1024, 1);
+ ret = test_add_free_space_entry(cache, SZ_1M, SZ_2M, 1);
if (ret) {
test_msg("Couldn't add bitmap entry %d\n", ret);
return ret;
}
- ret = test_add_free_space_entry(cache, 3 * 1024 * 1024, 1 * 1024 * 1024, 0);
+ ret = test_add_free_space_entry(cache, 3 * SZ_1M, SZ_1M, 0);
if (ret) {
test_msg("Couldn't add extent entry %d\n", ret);
return ret;
}
- ret = btrfs_remove_free_space(cache, 1 * 1024 * 1024, 3 * 1024 * 1024);
+ ret = btrfs_remove_free_space(cache, SZ_1M, 3 * SZ_1M);
if (ret) {
test_msg("Error removing bitmap and extent overlapping %d\n", ret);
return ret;
@@ -477,16 +437,15 @@ test_steal_space_from_bitmap_to_extent(struct btrfs_block_group_cache *cache)
/*
* Extent entry covering free space range [128Mb - 256Kb, 128Mb - 128Kb[
*/
- ret = test_add_free_space_entry(cache, 128 * 1024 * 1024 - 256 * 1024,
- 128 * 1024, 0);
+ ret = test_add_free_space_entry(cache, SZ_128M - SZ_256K, SZ_128K, 0);
if (ret) {
test_msg("Couldn't add extent entry %d\n", ret);
return ret;
}
/* Bitmap entry covering free space range [128Mb + 512Kb, 256Mb[ */
- ret = test_add_free_space_entry(cache, 128 * 1024 * 1024 + 512 * 1024,
- 128 * 1024 * 1024 - 512 * 1024, 1);
+ ret = test_add_free_space_entry(cache, SZ_128M + SZ_512K,
+ SZ_128M - SZ_512K, 1);
if (ret) {
test_msg("Couldn't add bitmap entry %d\n", ret);
return ret;
@@ -504,21 +463,19 @@ test_steal_space_from_bitmap_to_extent(struct btrfs_block_group_cache *cache)
* [128Mb + 512Kb, 128Mb + 768Kb[
*/
ret = btrfs_remove_free_space(cache,
- 128 * 1024 * 1024 + 768 * 1024,
- 128 * 1024 * 1024 - 768 * 1024);
+ SZ_128M + 768 * SZ_1K,
+ SZ_128M - 768 * SZ_1K);
if (ret) {
test_msg("Failed to free part of bitmap space %d\n", ret);
return ret;
}
/* Confirm that only those 2 ranges are marked as free. */
- if (!test_check_exists(cache, 128 * 1024 * 1024 - 256 * 1024,
- 128 * 1024)) {
+ if (!test_check_exists(cache, SZ_128M - SZ_256K, SZ_128K)) {
test_msg("Free space range missing\n");
return -ENOENT;
}
- if (!test_check_exists(cache, 128 * 1024 * 1024 + 512 * 1024,
- 256 * 1024)) {
+ if (!test_check_exists(cache, SZ_128M + SZ_512K, SZ_256K)) {
test_msg("Free space range missing\n");
return -ENOENT;
}
@@ -527,8 +484,8 @@ test_steal_space_from_bitmap_to_extent(struct btrfs_block_group_cache *cache)
* Confirm that the bitmap range [128Mb + 768Kb, 256Mb[ isn't marked
* as free anymore.
*/
- if (test_check_exists(cache, 128 * 1024 * 1024 + 768 * 1024,
- 128 * 1024 * 1024 - 768 * 1024)) {
+ if (test_check_exists(cache, SZ_128M + 768 * SZ_1K,
+ SZ_128M - 768 * SZ_1K)) {
test_msg("Bitmap region not removed from space cache\n");
return -EINVAL;
}
@@ -537,8 +494,7 @@ test_steal_space_from_bitmap_to_extent(struct btrfs_block_group_cache *cache)
* Confirm that the region [128Mb + 256Kb, 128Mb + 512Kb[, which is
* covered by the bitmap, isn't marked as free.
*/
- if (test_check_exists(cache, 128 * 1024 * 1024 + 256 * 1024,
- 256 * 1024)) {
+ if (test_check_exists(cache, SZ_128M + SZ_256K, SZ_256K)) {
test_msg("Invalid bitmap region marked as free\n");
return -EINVAL;
}
@@ -547,8 +503,7 @@ test_steal_space_from_bitmap_to_extent(struct btrfs_block_group_cache *cache)
* Confirm that the region [128Mb, 128Mb + 256Kb[, which is covered
* by the bitmap too, isn't marked as free either.
*/
- if (test_check_exists(cache, 128 * 1024 * 1024,
- 256 * 1024)) {
+ if (test_check_exists(cache, SZ_128M, SZ_256K)) {
test_msg("Invalid bitmap region marked as free\n");
return -EINVAL;
}
@@ -558,13 +513,13 @@ test_steal_space_from_bitmap_to_extent(struct btrfs_block_group_cache *cache)
* lets make sure the free space cache marks it as free in the bitmap,
* and doesn't insert a new extent entry to represent this region.
*/
- ret = btrfs_add_free_space(cache, 128 * 1024 * 1024, 512 * 1024);
+ ret = btrfs_add_free_space(cache, SZ_128M, SZ_512K);
if (ret) {
test_msg("Error adding free space: %d\n", ret);
return ret;
}
/* Confirm the region is marked as free. */
- if (!test_check_exists(cache, 128 * 1024 * 1024, 512 * 1024)) {
+ if (!test_check_exists(cache, SZ_128M, SZ_512K)) {
test_msg("Bitmap region not marked as free\n");
return -ENOENT;
}
@@ -583,8 +538,7 @@ test_steal_space_from_bitmap_to_extent(struct btrfs_block_group_cache *cache)
* The goal is to test that the bitmap entry space stealing doesn't
* steal this space region.
*/
- ret = btrfs_add_free_space(cache, 128 * 1024 * 1024 + 16 * 1024 * 1024,
- 4096);
+ ret = btrfs_add_free_space(cache, SZ_128M + SZ_16M, 4096);
if (ret) {
test_msg("Error adding free space: %d\n", ret);
return ret;
@@ -603,15 +557,13 @@ test_steal_space_from_bitmap_to_extent(struct btrfs_block_group_cache *cache)
* expand the range covered by the existing extent entry that represents
* the free space [128Mb - 256Kb, 128Mb - 128Kb[.
*/
- ret = btrfs_add_free_space(cache, 128 * 1024 * 1024 - 128 * 1024,
- 128 * 1024);
+ ret = btrfs_add_free_space(cache, SZ_128M - SZ_128K, SZ_128K);
if (ret) {
test_msg("Error adding free space: %d\n", ret);
return ret;
}
/* Confirm the region is marked as free. */
- if (!test_check_exists(cache, 128 * 1024 * 1024 - 128 * 1024,
- 128 * 1024)) {
+ if (!test_check_exists(cache, SZ_128M - SZ_128K, SZ_128K)) {
test_msg("Extent region not marked as free\n");
return -ENOENT;
}
@@ -639,21 +591,20 @@ test_steal_space_from_bitmap_to_extent(struct btrfs_block_group_cache *cache)
* that represents the 1Mb free space, and therefore we're able to
* allocate the whole free space at once.
*/
- if (!test_check_exists(cache, 128 * 1024 * 1024 - 256 * 1024,
- 1 * 1024 * 1024)) {
+ if (!test_check_exists(cache, SZ_128M - SZ_256K, SZ_1M)) {
test_msg("Expected region not marked as free\n");
return -ENOENT;
}
- if (cache->free_space_ctl->free_space != (1 * 1024 * 1024 + 4096)) {
+ if (cache->free_space_ctl->free_space != (SZ_1M + 4096)) {
test_msg("Cache free space is not 1Mb + 4Kb\n");
return -EINVAL;
}
offset = btrfs_find_space_for_alloc(cache,
- 0, 1 * 1024 * 1024, 0,
+ 0, SZ_1M, 0,
&max_extent_size);
- if (offset != (128 * 1024 * 1024 - 256 * 1024)) {
+ if (offset != (SZ_128M - SZ_256K)) {
test_msg("Failed to allocate 1Mb from space cache, returned offset is: %llu\n",
offset);
return -EINVAL;
@@ -672,7 +623,7 @@ test_steal_space_from_bitmap_to_extent(struct btrfs_block_group_cache *cache)
offset = btrfs_find_space_for_alloc(cache,
0, 4096, 0,
&max_extent_size);
- if (offset != (128 * 1024 * 1024 + 16 * 1024 * 1024)) {
+ if (offset != (SZ_128M + SZ_16M)) {
test_msg("Failed to allocate 4Kb from space cache, returned offset is: %llu\n",
offset);
return -EINVAL;
@@ -693,16 +644,14 @@ test_steal_space_from_bitmap_to_extent(struct btrfs_block_group_cache *cache)
/*
* Extent entry covering free space range [128Mb + 128Kb, 128Mb + 256Kb[
*/
- ret = test_add_free_space_entry(cache, 128 * 1024 * 1024 + 128 * 1024,
- 128 * 1024, 0);
+ ret = test_add_free_space_entry(cache, SZ_128M + SZ_128K, SZ_128K, 0);
if (ret) {
test_msg("Couldn't add extent entry %d\n", ret);
return ret;
}
/* Bitmap entry covering free space range [0, 128Mb - 512Kb[ */
- ret = test_add_free_space_entry(cache, 0,
- 128 * 1024 * 1024 - 512 * 1024, 1);
+ ret = test_add_free_space_entry(cache, 0, SZ_128M - SZ_512K, 1);
if (ret) {
test_msg("Couldn't add bitmap entry %d\n", ret);
return ret;
@@ -719,22 +668,18 @@ test_steal_space_from_bitmap_to_extent(struct btrfs_block_group_cache *cache)
* [128Mb + 128b, 128Mb + 256Kb[
* [128Mb - 768Kb, 128Mb - 512Kb[
*/
- ret = btrfs_remove_free_space(cache,
- 0,
- 128 * 1024 * 1024 - 768 * 1024);
+ ret = btrfs_remove_free_space(cache, 0, SZ_128M - 768 * SZ_1K);
if (ret) {
test_msg("Failed to free part of bitmap space %d\n", ret);
return ret;
}
/* Confirm that only those 2 ranges are marked as free. */
- if (!test_check_exists(cache, 128 * 1024 * 1024 + 128 * 1024,
- 128 * 1024)) {
+ if (!test_check_exists(cache, SZ_128M + SZ_128K, SZ_128K)) {
test_msg("Free space range missing\n");
return -ENOENT;
}
- if (!test_check_exists(cache, 128 * 1024 * 1024 - 768 * 1024,
- 256 * 1024)) {
+ if (!test_check_exists(cache, SZ_128M - 768 * SZ_1K, SZ_256K)) {
test_msg("Free space range missing\n");
return -ENOENT;
}
@@ -743,8 +688,7 @@ test_steal_space_from_bitmap_to_extent(struct btrfs_block_group_cache *cache)
* Confirm that the bitmap range [0, 128Mb - 768Kb[ isn't marked
* as free anymore.
*/
- if (test_check_exists(cache, 0,
- 128 * 1024 * 1024 - 768 * 1024)) {
+ if (test_check_exists(cache, 0, SZ_128M - 768 * SZ_1K)) {
test_msg("Bitmap region not removed from space cache\n");
return -EINVAL;
}
@@ -753,8 +697,7 @@ test_steal_space_from_bitmap_to_extent(struct btrfs_block_group_cache *cache)
* Confirm that the region [128Mb - 512Kb, 128Mb[, which is
* covered by the bitmap, isn't marked as free.
*/
- if (test_check_exists(cache, 128 * 1024 * 1024 - 512 * 1024,
- 512 * 1024)) {
+ if (test_check_exists(cache, SZ_128M - SZ_512K, SZ_512K)) {
test_msg("Invalid bitmap region marked as free\n");
return -EINVAL;
}
@@ -764,15 +707,13 @@ test_steal_space_from_bitmap_to_extent(struct btrfs_block_group_cache *cache)
* lets make sure the free space cache marks it as free in the bitmap,
* and doesn't insert a new extent entry to represent this region.
*/
- ret = btrfs_add_free_space(cache, 128 * 1024 * 1024 - 512 * 1024,
- 512 * 1024);
+ ret = btrfs_add_free_space(cache, SZ_128M - SZ_512K, SZ_512K);
if (ret) {
test_msg("Error adding free space: %d\n", ret);
return ret;
}
/* Confirm the region is marked as free. */
- if (!test_check_exists(cache, 128 * 1024 * 1024 - 512 * 1024,
- 512 * 1024)) {
+ if (!test_check_exists(cache, SZ_128M - SZ_512K, SZ_512K)) {
test_msg("Bitmap region not marked as free\n");
return -ENOENT;
}
@@ -791,7 +732,7 @@ test_steal_space_from_bitmap_to_extent(struct btrfs_block_group_cache *cache)
* The goal is to test that the bitmap entry space stealing doesn't
* steal this space region.
*/
- ret = btrfs_add_free_space(cache, 32 * 1024 * 1024, 8192);
+ ret = btrfs_add_free_space(cache, SZ_32M, 8192);
if (ret) {
test_msg("Error adding free space: %d\n", ret);
return ret;
@@ -802,13 +743,13 @@ test_steal_space_from_bitmap_to_extent(struct btrfs_block_group_cache *cache)
* expand the range covered by the existing extent entry that represents
* the free space [128Mb + 128Kb, 128Mb + 256Kb[.
*/
- ret = btrfs_add_free_space(cache, 128 * 1024 * 1024, 128 * 1024);
+ ret = btrfs_add_free_space(cache, SZ_128M, SZ_128K);
if (ret) {
test_msg("Error adding free space: %d\n", ret);
return ret;
}
/* Confirm the region is marked as free. */
- if (!test_check_exists(cache, 128 * 1024 * 1024, 128 * 1024)) {
+ if (!test_check_exists(cache, SZ_128M, SZ_128K)) {
test_msg("Extent region not marked as free\n");
return -ENOENT;
}
@@ -836,21 +777,19 @@ test_steal_space_from_bitmap_to_extent(struct btrfs_block_group_cache *cache)
* that represents the 1Mb free space, and therefore we're able to
* allocate the whole free space at once.
*/
- if (!test_check_exists(cache, 128 * 1024 * 1024 - 768 * 1024,
- 1 * 1024 * 1024)) {
+ if (!test_check_exists(cache, SZ_128M - 768 * SZ_1K, SZ_1M)) {
test_msg("Expected region not marked as free\n");
return -ENOENT;
}
- if (cache->free_space_ctl->free_space != (1 * 1024 * 1024 + 8192)) {
+ if (cache->free_space_ctl->free_space != (SZ_1M + 8192)) {
test_msg("Cache free space is not 1Mb + 8Kb\n");
return -EINVAL;
}
- offset = btrfs_find_space_for_alloc(cache,
- 0, 1 * 1024 * 1024, 0,
+ offset = btrfs_find_space_for_alloc(cache, 0, SZ_1M, 0,
&max_extent_size);
- if (offset != (128 * 1024 * 1024 - 768 * 1024)) {
+ if (offset != (SZ_128M - 768 * SZ_1K)) {
test_msg("Failed to allocate 1Mb from space cache, returned offset is: %llu\n",
offset);
return -EINVAL;
@@ -869,7 +808,7 @@ test_steal_space_from_bitmap_to_extent(struct btrfs_block_group_cache *cache)
offset = btrfs_find_space_for_alloc(cache,
0, 8192, 0,
&max_extent_size);
- if (offset != (32 * 1024 * 1024)) {
+ if (offset != SZ_32M) {
test_msg("Failed to allocate 8Kb from space cache, returned offset is: %llu\n",
offset);
return -EINVAL;
@@ -893,7 +832,7 @@ int btrfs_test_free_space_cache(void)
test_msg("Running btrfs free space cache tests\n");
- cache = init_test_block_group();
+ cache = btrfs_alloc_dummy_block_group(1024 * 1024 * 1024);
if (!cache) {
test_msg("Couldn't run the tests\n");
return 0;
@@ -924,9 +863,7 @@ int btrfs_test_free_space_cache(void)
ret = test_steal_space_from_bitmap_to_extent(cache);
out:
- __btrfs_remove_free_space_cache(cache->free_space_ctl);
- kfree(cache->free_space_ctl);
- kfree(cache);
+ btrfs_free_dummy_block_group(cache);
btrfs_free_dummy_root(root);
test_msg("Free space cache tests finished\n");
return ret;
diff --git a/fs/btrfs/tests/free-space-tree-tests.c b/fs/btrfs/tests/free-space-tree-tests.c
new file mode 100644
index 000000000000..d05fe1ab4808
--- /dev/null
+++ b/fs/btrfs/tests/free-space-tree-tests.c
@@ -0,0 +1,571 @@
+/*
+ * Copyright (C) 2015 Facebook. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public
+ * License v2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public
+ * License along with this program; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 021110-1307, USA.
+ */
+
+#include "btrfs-tests.h"
+#include "../ctree.h"
+#include "../disk-io.h"
+#include "../free-space-tree.h"
+#include "../transaction.h"
+
+struct free_space_extent {
+ u64 start, length;
+};
+
+/*
+ * The test cases align their operations to this in order to hit some of the
+ * edge cases in the bitmap code.
+ */
+#define BITMAP_RANGE (BTRFS_FREE_SPACE_BITMAP_BITS * 4096)
+
+static int __check_free_space_extents(struct btrfs_trans_handle *trans,
+ struct btrfs_fs_info *fs_info,
+ struct btrfs_block_group_cache *cache,
+ struct btrfs_path *path,
+ struct free_space_extent *extents,
+ unsigned int num_extents)
+{
+ struct btrfs_free_space_info *info;
+ struct btrfs_key key;
+ int prev_bit = 0, bit;
+ u64 extent_start = 0, offset, end;
+ u32 flags, extent_count;
+ unsigned int i;
+ int ret;
+
+ info = search_free_space_info(trans, fs_info, cache, path, 0);
+ if (IS_ERR(info)) {
+ test_msg("Could not find free space info\n");
+ ret = PTR_ERR(info);
+ goto out;
+ }
+ flags = btrfs_free_space_flags(path->nodes[0], info);
+ extent_count = btrfs_free_space_extent_count(path->nodes[0], info);
+
+ if (extent_count != num_extents) {
+ test_msg("Extent count is wrong\n");
+ ret = -EINVAL;
+ goto out;
+ }
+ if (flags & BTRFS_FREE_SPACE_USING_BITMAPS) {
+ if (path->slots[0] != 0)
+ goto invalid;
+ end = cache->key.objectid + cache->key.offset;
+ i = 0;
+ while (++path->slots[0] < btrfs_header_nritems(path->nodes[0])) {
+ btrfs_item_key_to_cpu(path->nodes[0], &key, path->slots[0]);
+ if (key.type != BTRFS_FREE_SPACE_BITMAP_KEY)
+ goto invalid;
+ offset = key.objectid;
+ while (offset < key.objectid + key.offset) {
+ bit = free_space_test_bit(cache, path, offset);
+ if (prev_bit == 0 && bit == 1) {
+ extent_start = offset;
+ } else if (prev_bit == 1 && bit == 0) {
+ if (i >= num_extents)
+ goto invalid;
+ if (i >= num_extents ||
+ extent_start != extents[i].start ||
+ offset - extent_start != extents[i].length)
+ goto invalid;
+ i++;
+ }
+ prev_bit = bit;
+ offset += cache->sectorsize;
+ }
+ }
+ if (prev_bit == 1) {
+ if (i >= num_extents ||
+ extent_start != extents[i].start ||
+ end - extent_start != extents[i].length)
+ goto invalid;
+ i++;
+ }
+ if (i != num_extents)
+ goto invalid;
+ } else {
+ if (btrfs_header_nritems(path->nodes[0]) != num_extents + 1 ||
+ path->slots[0] != 0)
+ goto invalid;
+ for (i = 0; i < num_extents; i++) {
+ path->slots[0]++;
+ btrfs_item_key_to_cpu(path->nodes[0], &key, path->slots[0]);
+ if (key.type != BTRFS_FREE_SPACE_EXTENT_KEY ||
+ key.objectid != extents[i].start ||
+ key.offset != extents[i].length)
+ goto invalid;
+ }
+ }
+
+ ret = 0;
+out:
+ btrfs_release_path(path);
+ return ret;
+invalid:
+ test_msg("Free space tree is invalid\n");
+ ret = -EINVAL;
+ goto out;
+}
+
+static int check_free_space_extents(struct btrfs_trans_handle *trans,
+ struct btrfs_fs_info *fs_info,
+ struct btrfs_block_group_cache *cache,
+ struct btrfs_path *path,
+ struct free_space_extent *extents,
+ unsigned int num_extents)
+{
+ struct btrfs_free_space_info *info;
+ u32 flags;
+ int ret;
+
+ info = search_free_space_info(trans, fs_info, cache, path, 0);
+ if (IS_ERR(info)) {
+ test_msg("Could not find free space info\n");
+ btrfs_release_path(path);
+ return PTR_ERR(info);
+ }
+ flags = btrfs_free_space_flags(path->nodes[0], info);
+ btrfs_release_path(path);
+
+ ret = __check_free_space_extents(trans, fs_info, cache, path, extents,
+ num_extents);
+ if (ret)
+ return ret;
+
+ /* Flip it to the other format and check that for good measure. */
+ if (flags & BTRFS_FREE_SPACE_USING_BITMAPS) {
+ ret = convert_free_space_to_extents(trans, fs_info, cache, path);
+ if (ret) {
+ test_msg("Could not convert to extents\n");
+ return ret;
+ }
+ } else {
+ ret = convert_free_space_to_bitmaps(trans, fs_info, cache, path);
+ if (ret) {
+ test_msg("Could not convert to bitmaps\n");
+ return ret;
+ }
+ }
+ return __check_free_space_extents(trans, fs_info, cache, path, extents,
+ num_extents);
+}
+
+static int test_empty_block_group(struct btrfs_trans_handle *trans,
+ struct btrfs_fs_info *fs_info,
+ struct btrfs_block_group_cache *cache,
+ struct btrfs_path *path)
+{
+ struct free_space_extent extents[] = {
+ {cache->key.objectid, cache->key.offset},
+ };
+
+ return check_free_space_extents(trans, fs_info, cache, path,
+ extents, ARRAY_SIZE(extents));
+}
+
+static int test_remove_all(struct btrfs_trans_handle *trans,
+ struct btrfs_fs_info *fs_info,
+ struct btrfs_block_group_cache *cache,
+ struct btrfs_path *path)
+{
+ struct free_space_extent extents[] = {};
+ int ret;
+
+ ret = __remove_from_free_space_tree(trans, fs_info, cache, path,
+ cache->key.objectid,
+ cache->key.offset);
+ if (ret) {
+ test_msg("Could not remove free space\n");
+ return ret;
+ }
+
+ return check_free_space_extents(trans, fs_info, cache, path,
+ extents, ARRAY_SIZE(extents));
+}
+
+static int test_remove_beginning(struct btrfs_trans_handle *trans,
+ struct btrfs_fs_info *fs_info,
+ struct btrfs_block_group_cache *cache,
+ struct btrfs_path *path)
+{
+ struct free_space_extent extents[] = {
+ {cache->key.objectid + BITMAP_RANGE,
+ cache->key.offset - BITMAP_RANGE},
+ };
+ int ret;
+
+ ret = __remove_from_free_space_tree(trans, fs_info, cache, path,
+ cache->key.objectid, BITMAP_RANGE);
+ if (ret) {
+ test_msg("Could not remove free space\n");
+ return ret;
+ }
+
+ return check_free_space_extents(trans, fs_info, cache, path,
+ extents, ARRAY_SIZE(extents));
+
+}
+
+static int test_remove_end(struct btrfs_trans_handle *trans,
+ struct btrfs_fs_info *fs_info,
+ struct btrfs_block_group_cache *cache,
+ struct btrfs_path *path)
+{
+ struct free_space_extent extents[] = {
+ {cache->key.objectid, cache->key.offset - BITMAP_RANGE},
+ };
+ int ret;
+
+ ret = __remove_from_free_space_tree(trans, fs_info, cache, path,
+ cache->key.objectid +
+ cache->key.offset - BITMAP_RANGE,
+ BITMAP_RANGE);
+ if (ret) {
+ test_msg("Could not remove free space\n");
+ return ret;
+ }
+
+ return check_free_space_extents(trans, fs_info, cache, path,
+ extents, ARRAY_SIZE(extents));
+}
+
+static int test_remove_middle(struct btrfs_trans_handle *trans,
+ struct btrfs_fs_info *fs_info,
+ struct btrfs_block_group_cache *cache,
+ struct btrfs_path *path)
+{
+ struct free_space_extent extents[] = {
+ {cache->key.objectid, BITMAP_RANGE},
+ {cache->key.objectid + 2 * BITMAP_RANGE,
+ cache->key.offset - 2 * BITMAP_RANGE},
+ };
+ int ret;
+
+ ret = __remove_from_free_space_tree(trans, fs_info, cache, path,
+ cache->key.objectid + BITMAP_RANGE,
+ BITMAP_RANGE);
+ if (ret) {
+ test_msg("Could not remove free space\n");
+ return ret;
+ }
+
+ return check_free_space_extents(trans, fs_info, cache, path,
+ extents, ARRAY_SIZE(extents));
+}
+
+static int test_merge_left(struct btrfs_trans_handle *trans,
+ struct btrfs_fs_info *fs_info,
+ struct btrfs_block_group_cache *cache,
+ struct btrfs_path *path)
+{
+ struct free_space_extent extents[] = {
+ {cache->key.objectid, 2 * BITMAP_RANGE},
+ };
+ int ret;
+
+ ret = __remove_from_free_space_tree(trans, fs_info, cache, path,
+ cache->key.objectid,
+ cache->key.offset);
+ if (ret) {
+ test_msg("Could not remove free space\n");
+ return ret;
+ }
+
+ ret = __add_to_free_space_tree(trans, fs_info, cache, path,
+ cache->key.objectid, BITMAP_RANGE);
+ if (ret) {
+ test_msg("Could not add free space\n");
+ return ret;
+ }
+
+ ret = __add_to_free_space_tree(trans, fs_info, cache, path,
+ cache->key.objectid + BITMAP_RANGE,
+ BITMAP_RANGE);
+ if (ret) {
+ test_msg("Could not add free space\n");
+ return ret;
+ }
+
+ return check_free_space_extents(trans, fs_info, cache, path,
+ extents, ARRAY_SIZE(extents));
+}
+
+static int test_merge_right(struct btrfs_trans_handle *trans,
+ struct btrfs_fs_info *fs_info,
+ struct btrfs_block_group_cache *cache,
+ struct btrfs_path *path)
+{
+ struct free_space_extent extents[] = {
+ {cache->key.objectid + BITMAP_RANGE, 2 * BITMAP_RANGE},
+ };
+ int ret;
+
+ ret = __remove_from_free_space_tree(trans, fs_info, cache, path,
+ cache->key.objectid,
+ cache->key.offset);
+ if (ret) {
+ test_msg("Could not remove free space\n");
+ return ret;
+ }
+
+ ret = __add_to_free_space_tree(trans, fs_info, cache, path,
+ cache->key.objectid + 2 * BITMAP_RANGE,
+ BITMAP_RANGE);
+ if (ret) {
+ test_msg("Could not add free space\n");
+ return ret;
+ }
+
+ ret = __add_to_free_space_tree(trans, fs_info, cache, path,
+ cache->key.objectid + BITMAP_RANGE,
+ BITMAP_RANGE);
+ if (ret) {
+ test_msg("Could not add free space\n");
+ return ret;
+ }
+
+ return check_free_space_extents(trans, fs_info, cache, path,
+ extents, ARRAY_SIZE(extents));
+}
+
+static int test_merge_both(struct btrfs_trans_handle *trans,
+ struct btrfs_fs_info *fs_info,
+ struct btrfs_block_group_cache *cache,
+ struct btrfs_path *path)
+{
+ struct free_space_extent extents[] = {
+ {cache->key.objectid, 3 * BITMAP_RANGE},
+ };
+ int ret;
+
+ ret = __remove_from_free_space_tree(trans, fs_info, cache, path,
+ cache->key.objectid,
+ cache->key.offset);
+ if (ret) {
+ test_msg("Could not remove free space\n");
+ return ret;
+ }
+
+ ret = __add_to_free_space_tree(trans, fs_info, cache, path,
+ cache->key.objectid, BITMAP_RANGE);
+ if (ret) {
+ test_msg("Could not add free space\n");
+ return ret;
+ }
+
+ ret = __add_to_free_space_tree(trans, fs_info, cache, path,
+ cache->key.objectid + 2 * BITMAP_RANGE,
+ BITMAP_RANGE);
+ if (ret) {
+ test_msg("Could not add free space\n");
+ return ret;
+ }
+
+ ret = __add_to_free_space_tree(trans, fs_info, cache, path,
+ cache->key.objectid + BITMAP_RANGE,
+ BITMAP_RANGE);
+ if (ret) {
+ test_msg("Could not add free space\n");
+ return ret;
+ }
+
+ return check_free_space_extents(trans, fs_info, cache, path,
+ extents, ARRAY_SIZE(extents));
+}
+
+static int test_merge_none(struct btrfs_trans_handle *trans,
+ struct btrfs_fs_info *fs_info,
+ struct btrfs_block_group_cache *cache,
+ struct btrfs_path *path)
+{
+ struct free_space_extent extents[] = {
+ {cache->key.objectid, BITMAP_RANGE},
+ {cache->key.objectid + 2 * BITMAP_RANGE, BITMAP_RANGE},
+ {cache->key.objectid + 4 * BITMAP_RANGE, BITMAP_RANGE},
+ };
+ int ret;
+
+ ret = __remove_from_free_space_tree(trans, fs_info, cache, path,
+ cache->key.objectid,
+ cache->key.offset);
+ if (ret) {
+ test_msg("Could not remove free space\n");
+ return ret;
+ }
+
+ ret = __add_to_free_space_tree(trans, fs_info, cache, path,
+ cache->key.objectid, BITMAP_RANGE);
+ if (ret) {
+ test_msg("Could not add free space\n");
+ return ret;
+ }
+
+ ret = __add_to_free_space_tree(trans, fs_info, cache, path,
+ cache->key.objectid + 4 * BITMAP_RANGE,
+ BITMAP_RANGE);
+ if (ret) {
+ test_msg("Could not add free space\n");
+ return ret;
+ }
+
+ ret = __add_to_free_space_tree(trans, fs_info, cache, path,
+ cache->key.objectid + 2 * BITMAP_RANGE,
+ BITMAP_RANGE);
+ if (ret) {
+ test_msg("Could not add free space\n");
+ return ret;
+ }
+
+ return check_free_space_extents(trans, fs_info, cache, path,
+ extents, ARRAY_SIZE(extents));
+}
+
+typedef int (*test_func_t)(struct btrfs_trans_handle *,
+ struct btrfs_fs_info *,
+ struct btrfs_block_group_cache *,
+ struct btrfs_path *);
+
+static int run_test(test_func_t test_func, int bitmaps)
+{
+ struct btrfs_root *root = NULL;
+ struct btrfs_block_group_cache *cache = NULL;
+ struct btrfs_trans_handle trans;
+ struct btrfs_path *path = NULL;
+ int ret;
+
+ root = btrfs_alloc_dummy_root();
+ if (IS_ERR(root)) {
+ test_msg("Couldn't allocate dummy root\n");
+ ret = PTR_ERR(root);
+ goto out;
+ }
+
+ root->fs_info = btrfs_alloc_dummy_fs_info();
+ if (!root->fs_info) {
+ test_msg("Couldn't allocate dummy fs info\n");
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ btrfs_set_super_compat_ro_flags(root->fs_info->super_copy,
+ BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE);
+ root->fs_info->free_space_root = root;
+ root->fs_info->tree_root = root;
+
+ root->node = alloc_test_extent_buffer(root->fs_info, 4096);
+ if (!root->node) {
+ test_msg("Couldn't allocate dummy buffer\n");
+ ret = -ENOMEM;
+ goto out;
+ }
+ btrfs_set_header_level(root->node, 0);
+ btrfs_set_header_nritems(root->node, 0);
+ root->alloc_bytenr += 8192;
+
+ cache = btrfs_alloc_dummy_block_group(8 * BITMAP_RANGE);
+ if (!cache) {
+ test_msg("Couldn't allocate dummy block group cache\n");
+ ret = -ENOMEM;
+ goto out;
+ }
+ cache->bitmap_low_thresh = 0;
+ cache->bitmap_high_thresh = (u32)-1;
+ cache->needs_free_space = 1;
+
+ btrfs_init_dummy_trans(&trans);
+
+ path = btrfs_alloc_path();
+ if (!path) {
+ test_msg("Couldn't allocate path\n");
+ return -ENOMEM;
+ }
+
+ ret = add_block_group_free_space(&trans, root->fs_info, cache);
+ if (ret) {
+ test_msg("Could not add block group free space\n");
+ goto out;
+ }
+
+ if (bitmaps) {
+ ret = convert_free_space_to_bitmaps(&trans, root->fs_info,
+ cache, path);
+ if (ret) {
+ test_msg("Could not convert block group to bitmaps\n");
+ goto out;
+ }
+ }
+
+ ret = test_func(&trans, root->fs_info, cache, path);
+ if (ret)
+ goto out;
+
+ ret = remove_block_group_free_space(&trans, root->fs_info, cache);
+ if (ret) {
+ test_msg("Could not remove block group free space\n");
+ goto out;
+ }
+
+ if (btrfs_header_nritems(root->node) != 0) {
+ test_msg("Free space tree has leftover items\n");
+ ret = -EINVAL;
+ goto out;
+ }
+
+ ret = 0;
+out:
+ btrfs_free_path(path);
+ btrfs_free_dummy_block_group(cache);
+ btrfs_free_dummy_root(root);
+ return ret;
+}
+
+static int run_test_both_formats(test_func_t test_func)
+{
+ int ret;
+
+ ret = run_test(test_func, 0);
+ if (ret)
+ return ret;
+ return run_test(test_func, 1);
+}
+
+int btrfs_test_free_space_tree(void)
+{
+ test_func_t tests[] = {
+ test_empty_block_group,
+ test_remove_all,
+ test_remove_beginning,
+ test_remove_end,
+ test_remove_middle,
+ test_merge_left,
+ test_merge_right,
+ test_merge_both,
+ test_merge_none,
+ };
+ int i;
+
+ test_msg("Running free space tree tests\n");
+ for (i = 0; i < ARRAY_SIZE(tests); i++) {
+ int ret = run_test_both_formats(tests[i]);
+ if (ret) {
+ test_msg("%pf failed\n", tests[i]);
+ return ret;
+ }
+ }
+
+ return 0;
+}
diff --git a/fs/btrfs/tests/inode-tests.c b/fs/btrfs/tests/inode-tests.c
index 054fc0d97131..5de55fdd28bc 100644
--- a/fs/btrfs/tests/inode-tests.c
+++ b/fs/btrfs/tests/inode-tests.c
@@ -100,7 +100,7 @@ static void insert_inode_item_key(struct btrfs_root *root)
static void setup_file_extents(struct btrfs_root *root)
{
int slot = 0;
- u64 disk_bytenr = 1 * 1024 * 1024;
+ u64 disk_bytenr = SZ_1M;
u64 offset = 0;
/* First we want a hole */
diff --git a/fs/btrfs/tests/qgroup-tests.c b/fs/btrfs/tests/qgroup-tests.c
index 846d277b1901..8ea5d34bc5a2 100644
--- a/fs/btrfs/tests/qgroup-tests.c
+++ b/fs/btrfs/tests/qgroup-tests.c
@@ -23,14 +23,6 @@
#include "../qgroup.h"
#include "../backref.h"
-static void init_dummy_trans(struct btrfs_trans_handle *trans)
-{
- memset(trans, 0, sizeof(*trans));
- trans->transid = 1;
- INIT_LIST_HEAD(&trans->qgroup_ref_list);
- trans->type = __TRANS_DUMMY;
-}
-
static int insert_normal_tree_ref(struct btrfs_root *root, u64 bytenr,
u64 num_bytes, u64 parent, u64 root_objectid)
{
@@ -44,7 +36,7 @@ static int insert_normal_tree_ref(struct btrfs_root *root, u64 bytenr,
u32 size = sizeof(*item) + sizeof(*iref) + sizeof(*block_info);
int ret;
- init_dummy_trans(&trans);
+ btrfs_init_dummy_trans(&trans);
ins.objectid = bytenr;
ins.type = BTRFS_EXTENT_ITEM_KEY;
@@ -94,7 +86,7 @@ static int add_tree_ref(struct btrfs_root *root, u64 bytenr, u64 num_bytes,
u64 refs;
int ret;
- init_dummy_trans(&trans);
+ btrfs_init_dummy_trans(&trans);
key.objectid = bytenr;
key.type = BTRFS_EXTENT_ITEM_KEY;
@@ -144,7 +136,7 @@ static int remove_extent_item(struct btrfs_root *root, u64 bytenr,
struct btrfs_path *path;
int ret;
- init_dummy_trans(&trans);
+ btrfs_init_dummy_trans(&trans);
key.objectid = bytenr;
key.type = BTRFS_EXTENT_ITEM_KEY;
@@ -178,7 +170,7 @@ static int remove_extent_ref(struct btrfs_root *root, u64 bytenr,
u64 refs;
int ret;
- init_dummy_trans(&trans);
+ btrfs_init_dummy_trans(&trans);
key.objectid = bytenr;
key.type = BTRFS_EXTENT_ITEM_KEY;
@@ -232,7 +224,7 @@ static int test_no_shared_qgroup(struct btrfs_root *root)
struct ulist *new_roots = NULL;
int ret;
- init_dummy_trans(&trans);
+ btrfs_init_dummy_trans(&trans);
test_msg("Qgroup basic add\n");
ret = btrfs_create_qgroup(NULL, fs_info, 5);
@@ -326,7 +318,7 @@ static int test_multiple_refs(struct btrfs_root *root)
struct ulist *new_roots = NULL;
int ret;
- init_dummy_trans(&trans);
+ btrfs_init_dummy_trans(&trans);
test_msg("Qgroup multiple refs test\n");
diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c
index be463b7f1f30..b6031ce474f7 100644
--- a/fs/btrfs/transaction.c
+++ b/fs/btrfs/transaction.c
@@ -75,6 +75,23 @@ void btrfs_put_transaction(struct btrfs_transaction *transaction)
list_del_init(&em->list);
free_extent_map(em);
}
+ /*
+ * If any block groups are found in ->deleted_bgs then it's
+ * because the transaction was aborted and a commit did not
+ * happen (things failed before writing the new superblock
+ * and calling btrfs_finish_extent_commit()), so we can not
+ * discard the physical locations of the block groups.
+ */
+ while (!list_empty(&transaction->deleted_bgs)) {
+ struct btrfs_block_group_cache *cache;
+
+ cache = list_first_entry(&transaction->deleted_bgs,
+ struct btrfs_block_group_cache,
+ bg_list);
+ list_del_init(&cache->bg_list);
+ btrfs_put_block_group_trimming(cache);
+ btrfs_put_block_group(cache);
+ }
kmem_cache_free(btrfs_transaction_cachep, transaction);
}
}
@@ -634,17 +651,20 @@ struct btrfs_trans_handle *btrfs_start_transaction_lflush(
struct btrfs_trans_handle *btrfs_join_transaction(struct btrfs_root *root)
{
- return start_transaction(root, 0, TRANS_JOIN, 0);
+ return start_transaction(root, 0, TRANS_JOIN,
+ BTRFS_RESERVE_NO_FLUSH);
}
struct btrfs_trans_handle *btrfs_join_transaction_nolock(struct btrfs_root *root)
{
- return start_transaction(root, 0, TRANS_JOIN_NOLOCK, 0);
+ return start_transaction(root, 0, TRANS_JOIN_NOLOCK,
+ BTRFS_RESERVE_NO_FLUSH);
}
struct btrfs_trans_handle *btrfs_start_ioctl_transaction(struct btrfs_root *root)
{
- return start_transaction(root, 0, TRANS_USERSPACE, 0);
+ return start_transaction(root, 0, TRANS_USERSPACE,
+ BTRFS_RESERVE_NO_FLUSH);
}
/*
@@ -662,7 +682,8 @@ struct btrfs_trans_handle *btrfs_start_ioctl_transaction(struct btrfs_root *root
*/
struct btrfs_trans_handle *btrfs_attach_transaction(struct btrfs_root *root)
{
- return start_transaction(root, 0, TRANS_ATTACH, 0);
+ return start_transaction(root, 0, TRANS_ATTACH,
+ BTRFS_RESERVE_NO_FLUSH);
}
/*
@@ -677,7 +698,8 @@ btrfs_attach_transaction_barrier(struct btrfs_root *root)
{
struct btrfs_trans_handle *trans;
- trans = start_transaction(root, 0, TRANS_ATTACH, 0);
+ trans = start_transaction(root, 0, TRANS_ATTACH,
+ BTRFS_RESERVE_NO_FLUSH);
if (IS_ERR(trans) && PTR_ERR(trans) == -ENOENT)
btrfs_wait_for_commit(root, 0);
diff --git a/fs/btrfs/tree-defrag.c b/fs/btrfs/tree-defrag.c
index f31db4325339..cb65089127cc 100644
--- a/fs/btrfs/tree-defrag.c
+++ b/fs/btrfs/tree-defrag.c
@@ -89,6 +89,12 @@ int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
goto out;
}
btrfs_release_path(path);
+ /*
+ * We don't need a lock on a leaf. btrfs_realloc_node() will lock all
+ * leafs from path->nodes[1], so set lowest_level to 1 to avoid later
+ * a deadlock (attempting to write lock an already write locked leaf).
+ */
+ path->lowest_level = 1;
wret = btrfs_search_slot(trans, root, &key, path, 0, 1);
if (wret < 0) {
@@ -99,9 +105,12 @@ int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
ret = 0;
goto out;
}
- path->slots[1] = btrfs_header_nritems(path->nodes[1]);
- next_key_ret = btrfs_find_next_key(root, path, &key, 1,
- min_trans);
+ /*
+ * The node at level 1 must always be locked when our path has
+ * keep_locks set and lowest_level is 1, regardless of the value of
+ * path->slots[1].
+ */
+ BUG_ON(path->locks[1] == 0);
ret = btrfs_realloc_node(trans, root,
path->nodes[1], 0,
&last_ret,
@@ -110,6 +119,18 @@ int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
WARN_ON(ret == -EAGAIN);
goto out;
}
+ /*
+ * Now that we reallocated the node we can find the next key. Note that
+ * btrfs_find_next_key() can release our path and do another search
+ * without COWing, this is because even with path->keep_locks = 1,
+ * btrfs_search_slot() / ctree.c:unlock_up() does not keeps a lock on a
+ * node when path->slots[node_level - 1] does not point to the last
+ * item or a slot beyond the last item (ctree.c:unlock_up()). Therefore
+ * we search for the next key after reallocating our node.
+ */
+ path->slots[1] = btrfs_header_nritems(path->nodes[1]);
+ next_key_ret = btrfs_find_next_key(root, path, &key, 1,
+ min_trans);
if (next_key_ret == 0) {
memcpy(&root->defrag_progress, &key, sizeof(key));
ret = -EAGAIN;
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 21fbcedb6542..9b845155d21f 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -108,7 +108,7 @@ const struct btrfs_raid_attr btrfs_raid_array[BTRFS_NR_RAID_TYPES] = {
},
};
-const u64 const btrfs_raid_group[BTRFS_NR_RAID_TYPES] = {
+const u64 btrfs_raid_group[BTRFS_NR_RAID_TYPES] = {
[BTRFS_RAID_RAID10] = BTRFS_BLOCK_GROUP_RAID10,
[BTRFS_RAID_RAID1] = BTRFS_BLOCK_GROUP_RAID1,
[BTRFS_RAID_DUP] = BTRFS_BLOCK_GROUP_DUP,
@@ -125,6 +125,7 @@ static int btrfs_relocate_sys_chunks(struct btrfs_root *root);
static void __btrfs_reset_dev_stats(struct btrfs_device *dev);
static void btrfs_dev_stat_print_on_error(struct btrfs_device *dev);
static void btrfs_dev_stat_print_on_load(struct btrfs_device *device);
+static void btrfs_close_one_device(struct btrfs_device *device);
DEFINE_MUTEX(uuid_mutex);
static LIST_HEAD(fs_uuids);
@@ -1183,7 +1184,7 @@ again:
struct map_lookup *map;
int i;
- map = (struct map_lookup *)em->bdev;
+ map = em->map_lookup;
for (i = 0; i < map->num_stripes; i++) {
u64 end;
@@ -1258,6 +1259,15 @@ int find_free_dev_extent_start(struct btrfs_transaction *transaction,
int ret;
int slot;
struct extent_buffer *l;
+ u64 min_search_start;
+
+ /*
+ * We don't want to overwrite the superblock on the drive nor any area
+ * used by the boot loader (grub for example), so we make sure to start
+ * at an offset of at least 1MB.
+ */
+ min_search_start = max(root->fs_info->alloc_start, 1024ull * 1024);
+ search_start = max(search_start, min_search_start);
path = btrfs_alloc_path();
if (!path)
@@ -1398,18 +1408,9 @@ int find_free_dev_extent(struct btrfs_trans_handle *trans,
struct btrfs_device *device, u64 num_bytes,
u64 *start, u64 *len)
{
- struct btrfs_root *root = device->dev_root;
- u64 search_start;
-
/* FIXME use last free of some kind */
-
- /*
- * we don't want to overwrite the superblock on the drive,
- * so we make sure to start at an offset of at least 1MB
- */
- search_start = max(root->fs_info->alloc_start, 1024ull * 1024);
return find_free_dev_extent_start(trans->transaction, device,
- num_bytes, search_start, start, len);
+ num_bytes, 0, start, len);
}
static int btrfs_free_dev_extent(struct btrfs_trans_handle *trans,
@@ -1643,7 +1644,6 @@ static void update_dev_time(char *path_name)
return;
file_update_time(filp);
filp_close(filp, NULL);
- return;
}
static int btrfs_rm_dev_item(struct btrfs_root *root,
@@ -2756,7 +2756,7 @@ int btrfs_remove_chunk(struct btrfs_trans_handle *trans,
free_extent_map(em);
return -EINVAL;
}
- map = (struct map_lookup *)em->bdev;
+ map = em->map_lookup;
lock_chunks(root->fs_info->chunk_root);
check_system_chunk(trans, extent_root, map->type);
unlock_chunks(root->fs_info->chunk_root);
@@ -3407,7 +3407,7 @@ static int __btrfs_balance(struct btrfs_fs_info *fs_info)
list_for_each_entry(device, devices, dev_list) {
old_size = btrfs_device_get_total_bytes(device);
size_to_free = div_factor(old_size, 1);
- size_to_free = min(size_to_free, (u64)1 * 1024 * 1024);
+ size_to_free = min_t(u64, size_to_free, SZ_1M);
if (!device->writeable ||
btrfs_device_get_total_bytes(device) -
btrfs_device_get_bytes_used(device) > size_to_free ||
@@ -4460,7 +4460,7 @@ static int btrfs_cmp_device_info(const void *a, const void *b)
static u32 find_raid56_stripe_len(u32 data_devices, u32 dev_stripe_target)
{
/* TODO allow them to set a preferred stripe size */
- return 64 * 1024;
+ return SZ_64K;
}
static void check_raid56_incompat_flag(struct btrfs_fs_info *info, u64 type)
@@ -4528,21 +4528,21 @@ static int __btrfs_alloc_chunk(struct btrfs_trans_handle *trans,
ncopies = btrfs_raid_array[index].ncopies;
if (type & BTRFS_BLOCK_GROUP_DATA) {
- max_stripe_size = 1024 * 1024 * 1024;
+ max_stripe_size = SZ_1G;
max_chunk_size = 10 * max_stripe_size;
if (!devs_max)
devs_max = BTRFS_MAX_DEVS(info->chunk_root);
} else if (type & BTRFS_BLOCK_GROUP_METADATA) {
/* for larger filesystems, use larger metadata chunks */
- if (fs_devices->total_rw_bytes > 50ULL * 1024 * 1024 * 1024)
- max_stripe_size = 1024 * 1024 * 1024;
+ if (fs_devices->total_rw_bytes > 50ULL * SZ_1G)
+ max_stripe_size = SZ_1G;
else
- max_stripe_size = 256 * 1024 * 1024;
+ max_stripe_size = SZ_256M;
max_chunk_size = max_stripe_size;
if (!devs_max)
devs_max = BTRFS_MAX_DEVS(info->chunk_root);
} else if (type & BTRFS_BLOCK_GROUP_SYSTEM) {
- max_stripe_size = 32 * 1024 * 1024;
+ max_stripe_size = SZ_32M;
max_chunk_size = 2 * max_stripe_size;
if (!devs_max)
devs_max = BTRFS_MAX_DEVS_SYS_CHUNK;
@@ -4719,7 +4719,7 @@ static int __btrfs_alloc_chunk(struct btrfs_trans_handle *trans,
goto error;
}
set_bit(EXTENT_FLAG_FS_MAPPING, &em->flags);
- em->bdev = (struct block_device *)map;
+ em->map_lookup = map;
em->start = start;
em->len = num_bytes;
em->block_start = 0;
@@ -4793,7 +4793,7 @@ int btrfs_finish_chunk_alloc(struct btrfs_trans_handle *trans,
u64 dev_offset;
u64 stripe_size;
int i = 0;
- int ret;
+ int ret = 0;
em_tree = &extent_root->fs_info->mapping_tree.map_tree;
read_lock(&em_tree->lock);
@@ -4814,7 +4814,7 @@ int btrfs_finish_chunk_alloc(struct btrfs_trans_handle *trans,
return -EINVAL;
}
- map = (struct map_lookup *)em->bdev;
+ map = em->map_lookup;
item_size = btrfs_chunk_item_size(map->num_stripes);
stripe_size = em->orig_block_len;
@@ -4824,20 +4824,32 @@ int btrfs_finish_chunk_alloc(struct btrfs_trans_handle *trans,
goto out;
}
+ /*
+ * Take the device list mutex to prevent races with the final phase of
+ * a device replace operation that replaces the device object associated
+ * with the map's stripes, because the device object's id can change
+ * at any time during that final phase of the device replace operation
+ * (dev-replace.c:btrfs_dev_replace_finishing()).
+ */
+ mutex_lock(&chunk_root->fs_info->fs_devices->device_list_mutex);
for (i = 0; i < map->num_stripes; i++) {
device = map->stripes[i].dev;
dev_offset = map->stripes[i].physical;
ret = btrfs_update_device(trans, device);
if (ret)
- goto out;
+ break;
ret = btrfs_alloc_dev_extent(trans, device,
chunk_root->root_key.objectid,
BTRFS_FIRST_CHUNK_TREE_OBJECTID,
chunk_offset, dev_offset,
stripe_size);
if (ret)
- goto out;
+ break;
+ }
+ if (ret) {
+ mutex_unlock(&chunk_root->fs_info->fs_devices->device_list_mutex);
+ goto out;
}
stripe = &chunk->stripe;
@@ -4850,6 +4862,7 @@ int btrfs_finish_chunk_alloc(struct btrfs_trans_handle *trans,
memcpy(stripe->dev_uuid, device->uuid, BTRFS_UUID_SIZE);
stripe++;
}
+ mutex_unlock(&chunk_root->fs_info->fs_devices->device_list_mutex);
btrfs_set_stack_chunk_length(chunk, chunk_size);
btrfs_set_stack_chunk_owner(chunk, extent_root->root_key.objectid);
@@ -4956,7 +4969,7 @@ int btrfs_chunk_readonly(struct btrfs_root *root, u64 chunk_offset)
if (!em)
return 1;
- map = (struct map_lookup *)em->bdev;
+ map = em->map_lookup;
for (i = 0; i < map->num_stripes; i++) {
if (map->stripes[i].dev->missing) {
miss_ndevs++;
@@ -5036,7 +5049,7 @@ int btrfs_num_copies(struct btrfs_fs_info *fs_info, u64 logical, u64 len)
return 1;
}
- map = (struct map_lookup *)em->bdev;
+ map = em->map_lookup;
if (map->type & (BTRFS_BLOCK_GROUP_DUP | BTRFS_BLOCK_GROUP_RAID1))
ret = map->num_stripes;
else if (map->type & BTRFS_BLOCK_GROUP_RAID10)
@@ -5072,7 +5085,7 @@ unsigned long btrfs_full_stripe_len(struct btrfs_root *root,
BUG_ON(!em);
BUG_ON(em->start > logical || em->start + em->len < logical);
- map = (struct map_lookup *)em->bdev;
+ map = em->map_lookup;
if (map->type & BTRFS_BLOCK_GROUP_RAID56_MASK)
len = map->stripe_len * nr_data_stripes(map);
free_extent_map(em);
@@ -5093,7 +5106,7 @@ int btrfs_is_parity_mirror(struct btrfs_mapping_tree *map_tree,
BUG_ON(!em);
BUG_ON(em->start > logical || em->start + em->len < logical);
- map = (struct map_lookup *)em->bdev;
+ map = em->map_lookup;
if (map->type & BTRFS_BLOCK_GROUP_RAID56_MASK)
ret = 1;
free_extent_map(em);
@@ -5252,7 +5265,7 @@ static int __btrfs_map_block(struct btrfs_fs_info *fs_info, int rw,
return -EINVAL;
}
- map = (struct map_lookup *)em->bdev;
+ map = em->map_lookup;
offset = logical - em->start;
stripe_len = map->stripe_len;
@@ -5794,7 +5807,7 @@ int btrfs_rmap_block(struct btrfs_mapping_tree *map_tree,
free_extent_map(em);
return -EIO;
}
- map = (struct map_lookup *)em->bdev;
+ map = em->map_lookup;
length = em->len;
rmap_len = map->stripe_len;
@@ -6230,7 +6243,7 @@ static int read_one_chunk(struct btrfs_root *root, struct btrfs_key *key,
}
set_bit(EXTENT_FLAG_FS_MAPPING, &em->flags);
- em->bdev = (struct block_device *)map;
+ em->map_lookup = map;
em->start = logical;
em->len = length;
em->orig_start = 0;
@@ -6465,11 +6478,11 @@ int btrfs_read_sys_array(struct btrfs_root *root)
sb = btrfs_find_create_tree_block(root, BTRFS_SUPER_INFO_OFFSET);
if (!sb)
return -ENOMEM;
- btrfs_set_buffer_uptodate(sb);
+ set_extent_buffer_uptodate(sb);
btrfs_set_buffer_lockdep_class(root->root_key.objectid, sb, 0);
/*
* The sb extent buffer is artifical and just used to read the system array.
- * btrfs_set_buffer_uptodate() call does not properly mark all it's
+ * set_extent_buffer_uptodate() call does not properly mark all it's
* pages up-to-date when the page is larger: extent does not cover the
* whole page and consequently check_page_uptodate does not find all
* the page's extents up-to-date (the hole beyond sb),
@@ -6932,7 +6945,7 @@ void btrfs_update_commit_device_bytes_used(struct btrfs_root *root,
/* In order to kick the device replace finish process */
lock_chunks(root);
list_for_each_entry(em, &transaction->pending_chunks, list) {
- map = (struct map_lookup *)em->bdev;
+ map = em->map_lookup;
for (i = 0; i < map->num_stripes; i++) {
dev = map->stripes[i].dev;
@@ -6960,7 +6973,7 @@ void btrfs_reset_fs_info_ptr(struct btrfs_fs_info *fs_info)
}
}
-void btrfs_close_one_device(struct btrfs_device *device)
+static void btrfs_close_one_device(struct btrfs_device *device)
{
struct btrfs_fs_devices *fs_devices = device->fs_devices;
struct btrfs_device *new_device;
diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h
index d5c84f6b1353..1939ebde63df 100644
--- a/fs/btrfs/volumes.h
+++ b/fs/btrfs/volumes.h
@@ -26,7 +26,7 @@
extern struct mutex uuid_mutex;
-#define BTRFS_STRIPE_LEN (64 * 1024)
+#define BTRFS_STRIPE_LEN SZ_64K
struct buffer_head;
struct btrfs_pending_bios {
@@ -566,6 +566,5 @@ static inline void unlock_chunks(struct btrfs_root *root)
struct list_head *btrfs_get_fs_uuids(void);
void btrfs_set_fs_info_ptr(struct btrfs_fs_info *fs_info);
void btrfs_reset_fs_info_ptr(struct btrfs_fs_info *fs_info);
-void btrfs_close_one_device(struct btrfs_device *device);
#endif
diff --git a/fs/btrfs/xattr.c b/fs/btrfs/xattr.c
index 28b4e7e71e61..608552ed89c0 100644
--- a/fs/btrfs/xattr.c
+++ b/fs/btrfs/xattr.c
@@ -494,7 +494,7 @@ static int btrfs_initxattrs(struct inode *inode,
for (xattr = xattr_array; xattr->name != NULL; xattr++) {
name = kmalloc(XATTR_SECURITY_PREFIX_LEN +
- strlen(xattr->name) + 1, GFP_NOFS);
+ strlen(xattr->name) + 1, GFP_KERNEL);
if (!name) {
err = -ENOMEM;
break;
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