summaryrefslogtreecommitdiffstats
path: root/fs/btrfs
diff options
context:
space:
mode:
Diffstat (limited to 'fs/btrfs')
-rw-r--r--fs/btrfs/ctree.h4
-rw-r--r--fs/btrfs/disk-io.c4
-rw-r--r--fs/btrfs/file.c2
-rw-r--r--fs/btrfs/free-space-cache.c84
-rw-r--r--fs/btrfs/inode.c29
-rw-r--r--fs/btrfs/ioctl.c8
-rw-r--r--fs/btrfs/root-tree.c18
-rw-r--r--fs/btrfs/super.c19
-rw-r--r--fs/btrfs/transaction.c2
9 files changed, 145 insertions, 25 deletions
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index d47ce8307854..3458b5725540 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -1284,6 +1284,8 @@ struct btrfs_root {
#define BTRFS_INODE_DIRSYNC (1 << 10)
#define BTRFS_INODE_COMPRESS (1 << 11)
+#define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
+
/* some macros to generate set/get funcs for the struct fields. This
* assumes there is a lefoo_to_cpu for every type, so lets make a simple
* one for u8:
@@ -2359,6 +2361,8 @@ int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid);
int btrfs_find_orphan_roots(struct btrfs_root *tree_root);
int btrfs_set_root_node(struct btrfs_root_item *item,
struct extent_buffer *node);
+void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
+
/* dir-item.c */
int btrfs_insert_dir_item(struct btrfs_trans_handle *trans,
struct btrfs_root *root, const char *name,
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index d7a7315bd031..8f1d44ba332f 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -1275,8 +1275,10 @@ struct btrfs_root *btrfs_read_fs_root_no_radix(struct btrfs_root *tree_root,
root->commit_root = btrfs_root_node(root);
BUG_ON(!root->node);
out:
- if (location->objectid != BTRFS_TREE_LOG_OBJECTID)
+ if (location->objectid != BTRFS_TREE_LOG_OBJECTID) {
root->ref_cows = 1;
+ btrfs_check_and_init_root_item(&root->root_item);
+ }
return root;
}
diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index 656bc0a892b1..e621ea54a3fd 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -906,7 +906,7 @@ static noinline ssize_t __btrfs_buffered_write(struct file *file,
unsigned long last_index;
size_t num_written = 0;
int nrptrs;
- int ret;
+ int ret = 0;
nrptrs = min((iov_iter_count(i) + PAGE_CACHE_SIZE - 1) /
PAGE_CACHE_SIZE, PAGE_CACHE_SIZE /
diff --git a/fs/btrfs/free-space-cache.c b/fs/btrfs/free-space-cache.c
index 0037427d8a9d..f561c953205b 100644
--- a/fs/btrfs/free-space-cache.c
+++ b/fs/btrfs/free-space-cache.c
@@ -24,6 +24,7 @@
#include "free-space-cache.h"
#include "transaction.h"
#include "disk-io.h"
+#include "extent_io.h"
#define BITS_PER_BITMAP (PAGE_CACHE_SIZE * 8)
#define MAX_CACHE_BYTES_PER_GIG (32 * 1024)
@@ -81,6 +82,8 @@ struct inode *lookup_free_space_inode(struct btrfs_root *root,
return ERR_PTR(-ENOENT);
}
+ inode->i_mapping->flags &= ~__GFP_FS;
+
spin_lock(&block_group->lock);
if (!root->fs_info->closing) {
block_group->inode = igrab(inode);
@@ -222,6 +225,7 @@ int load_free_space_cache(struct btrfs_fs_info *fs_info,
u64 num_entries;
u64 num_bitmaps;
u64 generation;
+ u64 used = btrfs_block_group_used(&block_group->item);
u32 cur_crc = ~(u32)0;
pgoff_t index = 0;
unsigned long first_page_offset;
@@ -467,6 +471,17 @@ next:
index++;
}
+ spin_lock(&block_group->tree_lock);
+ if (block_group->free_space != (block_group->key.offset - used -
+ block_group->bytes_super)) {
+ spin_unlock(&block_group->tree_lock);
+ printk(KERN_ERR "block group %llu has an wrong amount of free "
+ "space\n", block_group->key.objectid);
+ ret = 0;
+ goto free_cache;
+ }
+ spin_unlock(&block_group->tree_lock);
+
ret = 1;
out:
kfree(checksums);
@@ -495,8 +510,11 @@ int btrfs_write_out_cache(struct btrfs_root *root,
struct list_head *pos, *n;
struct page *page;
struct extent_state *cached_state = NULL;
+ struct btrfs_free_cluster *cluster = NULL;
+ struct extent_io_tree *unpin = NULL;
struct list_head bitmap_list;
struct btrfs_key key;
+ u64 start, end, len;
u64 bytes = 0;
u32 *crc, *checksums;
pgoff_t index = 0, last_index = 0;
@@ -505,6 +523,7 @@ int btrfs_write_out_cache(struct btrfs_root *root,
int entries = 0;
int bitmaps = 0;
int ret = 0;
+ bool next_page = false;
root = root->fs_info->tree_root;
@@ -551,6 +570,18 @@ int btrfs_write_out_cache(struct btrfs_root *root,
*/
first_page_offset = (sizeof(u32) * num_checksums) + sizeof(u64);
+ /* Get the cluster for this block_group if it exists */
+ if (!list_empty(&block_group->cluster_list))
+ cluster = list_entry(block_group->cluster_list.next,
+ struct btrfs_free_cluster,
+ block_group_list);
+
+ /*
+ * We shouldn't have switched the pinned extents yet so this is the
+ * right one
+ */
+ unpin = root->fs_info->pinned_extents;
+
/*
* Lock all pages first so we can lock the extent safely.
*
@@ -580,6 +611,12 @@ int btrfs_write_out_cache(struct btrfs_root *root,
lock_extent_bits(&BTRFS_I(inode)->io_tree, 0, i_size_read(inode) - 1,
0, &cached_state, GFP_NOFS);
+ /*
+ * When searching for pinned extents, we need to start at our start
+ * offset.
+ */
+ start = block_group->key.objectid;
+
/* Write out the extent entries */
do {
struct btrfs_free_space_entry *entry;
@@ -587,6 +624,8 @@ int btrfs_write_out_cache(struct btrfs_root *root,
unsigned long offset = 0;
unsigned long start_offset = 0;
+ next_page = false;
+
if (index == 0) {
start_offset = first_page_offset;
offset = start_offset;
@@ -598,7 +637,7 @@ int btrfs_write_out_cache(struct btrfs_root *root,
entry = addr + start_offset;
memset(addr, 0, PAGE_CACHE_SIZE);
- while (1) {
+ while (node && !next_page) {
struct btrfs_free_space *e;
e = rb_entry(node, struct btrfs_free_space, offset_index);
@@ -614,12 +653,49 @@ int btrfs_write_out_cache(struct btrfs_root *root,
entry->type = BTRFS_FREE_SPACE_EXTENT;
}
node = rb_next(node);
- if (!node)
- break;
+ if (!node && cluster) {
+ node = rb_first(&cluster->root);
+ cluster = NULL;
+ }
offset += sizeof(struct btrfs_free_space_entry);
if (offset + sizeof(struct btrfs_free_space_entry) >=
PAGE_CACHE_SIZE)
+ next_page = true;
+ entry++;
+ }
+
+ /*
+ * We want to add any pinned extents to our free space cache
+ * so we don't leak the space
+ */
+ while (!next_page && (start < block_group->key.objectid +
+ block_group->key.offset)) {
+ ret = find_first_extent_bit(unpin, start, &start, &end,
+ EXTENT_DIRTY);
+ if (ret) {
+ ret = 0;
+ break;
+ }
+
+ /* This pinned extent is out of our range */
+ if (start >= block_group->key.objectid +
+ block_group->key.offset)
break;
+
+ len = block_group->key.objectid +
+ block_group->key.offset - start;
+ len = min(len, end + 1 - start);
+
+ entries++;
+ entry->offset = cpu_to_le64(start);
+ entry->bytes = cpu_to_le64(len);
+ entry->type = BTRFS_FREE_SPACE_EXTENT;
+
+ start = end + 1;
+ offset += sizeof(struct btrfs_free_space_entry);
+ if (offset + sizeof(struct btrfs_free_space_entry) >=
+ PAGE_CACHE_SIZE)
+ next_page = true;
entry++;
}
*crc = ~(u32)0;
@@ -650,7 +726,7 @@ int btrfs_write_out_cache(struct btrfs_root *root,
page_cache_release(page);
index++;
- } while (node);
+ } while (node || next_page);
/* Write out the bitmaps */
list_for_each_safe(pos, n, &bitmap_list) {
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 93c28a1d6bdc..65413394daef 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -112,6 +112,7 @@ static int btrfs_init_inode_security(struct btrfs_trans_handle *trans,
static noinline int insert_inline_extent(struct btrfs_trans_handle *trans,
struct btrfs_root *root, struct inode *inode,
u64 start, size_t size, size_t compressed_size,
+ int compress_type,
struct page **compressed_pages)
{
struct btrfs_key key;
@@ -126,12 +127,9 @@ static noinline int insert_inline_extent(struct btrfs_trans_handle *trans,
size_t cur_size = size;
size_t datasize;
unsigned long offset;
- int compress_type = BTRFS_COMPRESS_NONE;
- if (compressed_size && compressed_pages) {
- compress_type = root->fs_info->compress_type;
+ if (compressed_size && compressed_pages)
cur_size = compressed_size;
- }
path = btrfs_alloc_path();
if (!path)
@@ -221,7 +219,7 @@ fail:
static noinline int cow_file_range_inline(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct inode *inode, u64 start, u64 end,
- size_t compressed_size,
+ size_t compressed_size, int compress_type,
struct page **compressed_pages)
{
u64 isize = i_size_read(inode);
@@ -254,7 +252,7 @@ static noinline int cow_file_range_inline(struct btrfs_trans_handle *trans,
inline_len = min_t(u64, isize, actual_end);
ret = insert_inline_extent(trans, root, inode, start,
inline_len, compressed_size,
- compressed_pages);
+ compress_type, compressed_pages);
BUG_ON(ret);
btrfs_delalloc_release_metadata(inode, end + 1 - start);
btrfs_drop_extent_cache(inode, start, aligned_end - 1, 0);
@@ -433,12 +431,13 @@ again:
* to make an uncompressed inline extent.
*/
ret = cow_file_range_inline(trans, root, inode,
- start, end, 0, NULL);
+ start, end, 0, 0, NULL);
} else {
/* try making a compressed inline extent */
ret = cow_file_range_inline(trans, root, inode,
start, end,
- total_compressed, pages);
+ total_compressed,
+ compress_type, pages);
}
if (ret == 0) {
/*
@@ -792,7 +791,7 @@ static noinline int cow_file_range(struct inode *inode,
if (start == 0) {
/* lets try to make an inline extent */
ret = cow_file_range_inline(trans, root, inode,
- start, end, 0, NULL);
+ start, end, 0, 0, NULL);
if (ret == 0) {
extent_clear_unlock_delalloc(inode,
&BTRFS_I(inode)->io_tree,
@@ -2222,8 +2221,6 @@ int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode)
insert = 1;
#endif
insert = 1;
- } else {
- WARN_ON(!BTRFS_I(inode)->orphan_meta_reserved);
}
if (!BTRFS_I(inode)->orphan_meta_reserved) {
@@ -2537,8 +2534,6 @@ static void btrfs_read_locked_inode(struct inode *inode)
BTRFS_I(inode)->flags = btrfs_inode_flags(leaf, inode_item);
alloc_group_block = btrfs_inode_block_group(leaf, inode_item);
- if (location.objectid == BTRFS_FREE_SPACE_OBJECTID)
- inode->i_mapping->flags &= ~__GFP_FS;
/*
* try to precache a NULL acl entry for files that don't have
@@ -6960,8 +6955,10 @@ static int btrfs_rename(struct inode *old_dir, struct dentry *old_dentry,
* should cover the worst case number of items we'll modify.
*/
trans = btrfs_start_transaction(root, 20);
- if (IS_ERR(trans))
- return PTR_ERR(trans);
+ if (IS_ERR(trans)) {
+ ret = PTR_ERR(trans);
+ goto out_notrans;
+ }
btrfs_set_trans_block_group(trans, new_dir);
@@ -7061,7 +7058,7 @@ static int btrfs_rename(struct inode *old_dir, struct dentry *old_dentry,
}
out_fail:
btrfs_end_transaction_throttle(trans, root);
-
+out_notrans:
if (old_inode->i_ino == BTRFS_FIRST_FREE_OBJECTID)
up_read(&root->fs_info->subvol_sem);
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index 7c07fe26b7cf..cfc264fefdb0 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -373,6 +373,10 @@ static noinline int create_subvol(struct btrfs_root *root,
inode_item->nbytes = cpu_to_le64(root->leafsize);
inode_item->mode = cpu_to_le32(S_IFDIR | 0755);
+ root_item.flags = 0;
+ root_item.byte_limit = 0;
+ inode_item->flags = cpu_to_le64(BTRFS_INODE_ROOT_ITEM_INIT);
+
btrfs_set_root_bytenr(&root_item, leaf->start);
btrfs_set_root_generation(&root_item, trans->transid);
btrfs_set_root_level(&root_item, 0);
@@ -2436,8 +2440,10 @@ static noinline long btrfs_ioctl_start_sync(struct file *file, void __user *argp
return PTR_ERR(trans);
transid = trans->transid;
ret = btrfs_commit_transaction_async(trans, root, 0);
- if (ret)
+ if (ret) {
+ btrfs_end_transaction(trans, root);
return ret;
+ }
if (argp)
if (copy_to_user(argp, &transid, sizeof(transid)))
diff --git a/fs/btrfs/root-tree.c b/fs/btrfs/root-tree.c
index 29b2d7c930eb..6928bff62daa 100644
--- a/fs/btrfs/root-tree.c
+++ b/fs/btrfs/root-tree.c
@@ -473,3 +473,21 @@ again:
btrfs_free_path(path);
return 0;
}
+
+/*
+ * Old btrfs forgets to init root_item->flags and root_item->byte_limit
+ * for subvolumes. To work around this problem, we steal a bit from
+ * root_item->inode_item->flags, and use it to indicate if those fields
+ * have been properly initialized.
+ */
+void btrfs_check_and_init_root_item(struct btrfs_root_item *root_item)
+{
+ u64 inode_flags = le64_to_cpu(root_item->inode.flags);
+
+ if (!(inode_flags & BTRFS_INODE_ROOT_ITEM_INIT)) {
+ inode_flags |= BTRFS_INODE_ROOT_ITEM_INIT;
+ root_item->inode.flags = cpu_to_le64(inode_flags);
+ root_item->flags = 0;
+ root_item->byte_limit = 0;
+ }
+}
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 2edfc039f098..58e7de9cc90c 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -644,6 +644,7 @@ static int btrfs_show_options(struct seq_file *seq, struct vfsmount *vfs)
{
struct btrfs_root *root = btrfs_sb(vfs->mnt_sb);
struct btrfs_fs_info *info = root->fs_info;
+ char *compress_type;
if (btrfs_test_opt(root, DEGRADED))
seq_puts(seq, ",degraded");
@@ -662,8 +663,16 @@ static int btrfs_show_options(struct seq_file *seq, struct vfsmount *vfs)
if (info->thread_pool_size != min_t(unsigned long,
num_online_cpus() + 2, 8))
seq_printf(seq, ",thread_pool=%d", info->thread_pool_size);
- if (btrfs_test_opt(root, COMPRESS))
- seq_puts(seq, ",compress");
+ if (btrfs_test_opt(root, COMPRESS)) {
+ if (info->compress_type == BTRFS_COMPRESS_ZLIB)
+ compress_type = "zlib";
+ else
+ compress_type = "lzo";
+ if (btrfs_test_opt(root, FORCE_COMPRESS))
+ seq_printf(seq, ",compress-force=%s", compress_type);
+ else
+ seq_printf(seq, ",compress=%s", compress_type);
+ }
if (btrfs_test_opt(root, NOSSD))
seq_puts(seq, ",nossd");
if (btrfs_test_opt(root, SSD_SPREAD))
@@ -678,6 +687,12 @@ static int btrfs_show_options(struct seq_file *seq, struct vfsmount *vfs)
seq_puts(seq, ",discard");
if (!(root->fs_info->sb->s_flags & MS_POSIXACL))
seq_puts(seq, ",noacl");
+ if (btrfs_test_opt(root, SPACE_CACHE))
+ seq_puts(seq, ",space_cache");
+ if (btrfs_test_opt(root, CLEAR_CACHE))
+ seq_puts(seq, ",clear_cache");
+ if (btrfs_test_opt(root, USER_SUBVOL_RM_ALLOWED))
+ seq_puts(seq, ",user_subvol_rm_allowed");
return 0;
}
diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c
index ce48eb59d615..5b158da7e0bb 100644
--- a/fs/btrfs/transaction.c
+++ b/fs/btrfs/transaction.c
@@ -197,6 +197,7 @@ again:
ret = join_transaction(root);
if (ret < 0) {
+ kmem_cache_free(btrfs_trans_handle_cachep, h);
if (type != TRANS_JOIN_NOLOCK)
mutex_unlock(&root->fs_info->trans_mutex);
return ERR_PTR(ret);
@@ -975,6 +976,7 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans,
record_root_in_trans(trans, root);
btrfs_set_root_last_snapshot(&root->root_item, trans->transid);
memcpy(new_root_item, &root->root_item, sizeof(*new_root_item));
+ btrfs_check_and_init_root_item(new_root_item);
root_flags = btrfs_root_flags(new_root_item);
if (pending->readonly)
OpenPOWER on IntegriCloud