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-rw-r--r--fs/btrfs/ctree.h19
-rw-r--r--fs/btrfs/disk-io.c25
-rw-r--r--fs/btrfs/file-item.c56
-rw-r--r--fs/btrfs/ioctl.c9
-rw-r--r--fs/btrfs/tree-log.c10
5 files changed, 81 insertions, 38 deletions
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index b5af1fc77c5d..6d8350332b1d 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -109,8 +109,14 @@ struct btrfs_ordered_sum;
/* 32 bytes in various csum fields */
#define BTRFS_CSUM_SIZE 32
+
+/* csum types */
+#define BTRFS_CSUM_TYPE_CRC32 0
+
+static int btrfs_csum_sizes[] = { 4, 0 };
+
/* four bytes for CRC32 */
-#define BTRFS_CRC32_SIZE 4
+//#define BTRFS_CRC32_SIZE 4
#define BTRFS_EMPTY_DIR_SIZE 0
#define BTRFS_FT_UNKNOWN 0
@@ -308,6 +314,7 @@ struct btrfs_super_block {
__le64 compat_flags;
__le64 compat_ro_flags;
__le64 incompat_flags;
+ __le16 csum_type;
u8 root_level;
u8 chunk_root_level;
u8 log_root_level;
@@ -1483,6 +1490,7 @@ BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
last_snapshot, 64);
/* struct btrfs_super_block */
+
BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
@@ -1524,6 +1532,15 @@ BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
compat_flags, 64);
BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
incompat_flags, 64);
+BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
+ csum_type, 16);
+
+static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
+{
+ int t = btrfs_super_csum_type(s);
+ BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes));
+ return btrfs_csum_sizes[t];
+}
static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
{
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index dfd5ba05ce45..3eb7c2576fe5 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -176,7 +176,9 @@ void btrfs_csum_final(u32 crc, char *result)
static int csum_tree_block(struct btrfs_root *root, struct extent_buffer *buf,
int verify)
{
- char result[BTRFS_CRC32_SIZE];
+ u16 csum_size =
+ btrfs_super_csum_size(&root->fs_info->super_copy);
+ char *result = NULL;
unsigned long len;
unsigned long cur_len;
unsigned long offset = BTRFS_CSUM_SIZE;
@@ -186,6 +188,7 @@ static int csum_tree_block(struct btrfs_root *root, struct extent_buffer *buf,
unsigned long map_len;
int err;
u32 crc = ~(u32)0;
+ unsigned long inline_result;
len = buf->len - offset;
while(len > 0) {
@@ -204,25 +207,37 @@ static int csum_tree_block(struct btrfs_root *root, struct extent_buffer *buf,
offset += cur_len;
unmap_extent_buffer(buf, map_token, KM_USER0);
}
+ if (csum_size > sizeof(inline_result)) {
+ result = kzalloc(csum_size * sizeof(char), GFP_NOFS);
+ if (!result)
+ return 1;
+ } else {
+ result = (char *)&inline_result;
+ }
+
btrfs_csum_final(crc, result);
if (verify) {
/* FIXME, this is not good */
- if (memcmp_extent_buffer(buf, result, 0, BTRFS_CRC32_SIZE)) {
+ if (memcmp_extent_buffer(buf, result, 0, csum_size)) {
u32 val;
u32 found = 0;
- memcpy(&found, result, BTRFS_CRC32_SIZE);
+ memcpy(&found, result, csum_size);
- read_extent_buffer(buf, &val, 0, BTRFS_CRC32_SIZE);
+ read_extent_buffer(buf, &val, 0, csum_size);
printk("btrfs: %s checksum verify failed on %llu "
"wanted %X found %X level %d\n",
root->fs_info->sb->s_id,
buf->start, val, found, btrfs_header_level(buf));
+ if (result != (char *)&inline_result)
+ kfree(result);
return 1;
}
} else {
- write_extent_buffer(buf, result, 0, BTRFS_CRC32_SIZE);
+ write_extent_buffer(buf, result, 0, csum_size);
}
+ if (result != (char *)&inline_result)
+ kfree(result);
return 0;
}
diff --git a/fs/btrfs/file-item.c b/fs/btrfs/file-item.c
index f76378831407..234ed441736c 100644
--- a/fs/btrfs/file-item.c
+++ b/fs/btrfs/file-item.c
@@ -24,9 +24,9 @@
#include "transaction.h"
#include "print-tree.h"
-#define MAX_CSUM_ITEMS(r) ((((BTRFS_LEAF_DATA_SIZE(r) - \
- sizeof(struct btrfs_item) * 2) / \
- BTRFS_CRC32_SIZE) - 1))
+#define MAX_CSUM_ITEMS(r,size) ((((BTRFS_LEAF_DATA_SIZE(r) - \
+ sizeof(struct btrfs_item) * 2) / \
+ size) - 1))
int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
u64 objectid, u64 pos,
@@ -83,6 +83,8 @@ struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
struct btrfs_csum_item *item;
struct extent_buffer *leaf;
u64 csum_offset = 0;
+ u16 csum_size =
+ btrfs_super_csum_size(&root->fs_info->super_copy);
int csums_in_item;
file_key.objectid = objectid;
@@ -105,7 +107,7 @@ struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
csum_offset = (offset - found_key.offset) >>
root->fs_info->sb->s_blocksize_bits;
csums_in_item = btrfs_item_size_nr(leaf, path->slots[0]);
- csums_in_item /= BTRFS_CRC32_SIZE;
+ csums_in_item /= csum_size;
if (csum_offset >= csums_in_item) {
ret = -EFBIG;
@@ -114,7 +116,7 @@ struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
}
item = btrfs_item_ptr(leaf, path->slots[0], struct btrfs_csum_item);
item = (struct btrfs_csum_item *)((unsigned char *)item +
- csum_offset * BTRFS_CRC32_SIZE);
+ csum_offset * csum_size);
return item;
fail:
if (ret > 0)
@@ -150,6 +152,8 @@ int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
u64 item_start_offset = 0;
u64 item_last_offset = 0;
u32 diff;
+ u16 csum_size =
+ btrfs_super_csum_size(&root->fs_info->super_copy);
int ret;
struct btrfs_path *path;
struct btrfs_csum_item *item = NULL;
@@ -195,7 +199,7 @@ int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
item_size = btrfs_item_size_nr(path->nodes[0],
path->slots[0]);
item_last_offset = item_start_offset +
- (item_size / BTRFS_CRC32_SIZE) *
+ (item_size / csum_size) *
root->sectorsize;
item = btrfs_item_ptr(path->nodes[0], path->slots[0],
struct btrfs_csum_item);
@@ -206,11 +210,11 @@ int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
*/
diff = offset - item_start_offset;
diff = diff / root->sectorsize;
- diff = diff * BTRFS_CRC32_SIZE;
+ diff = diff * csum_size;
read_extent_buffer(path->nodes[0], &sum,
((unsigned long)item) + diff,
- BTRFS_CRC32_SIZE);
+ csum_size);
found:
set_state_private(io_tree, offset, sum);
bio_index++;
@@ -383,6 +387,8 @@ int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
char *eb_token;
unsigned long map_len;
unsigned long map_start;
+ u16 csum_size =
+ btrfs_super_csum_size(&root->fs_info->super_copy);
path = btrfs_alloc_path();
BUG_ON(!path);
@@ -408,7 +414,8 @@ again:
/* we found one, but it isn't big enough yet */
leaf = path->nodes[0];
item_size = btrfs_item_size_nr(leaf, path->slots[0]);
- if ((item_size / BTRFS_CRC32_SIZE) >= MAX_CSUM_ITEMS(root)) {
+ if ((item_size / csum_size) >=
+ MAX_CSUM_ITEMS(root, csum_size)) {
/* already at max size, make a new one */
goto insert;
}
@@ -441,7 +448,7 @@ again:
*/
btrfs_release_path(root, path);
ret = btrfs_search_slot(trans, root, &file_key, path,
- BTRFS_CRC32_SIZE, 1);
+ csum_size, 1);
if (ret < 0)
goto fail_unlock;
if (ret == 0) {
@@ -457,14 +464,14 @@ again:
root->fs_info->sb->s_blocksize_bits;
if (btrfs_key_type(&found_key) != BTRFS_CSUM_ITEM_KEY ||
found_key.objectid != objectid ||
- csum_offset >= MAX_CSUM_ITEMS(root)) {
+ csum_offset >= MAX_CSUM_ITEMS(root, csum_size)) {
goto insert;
}
if (csum_offset >= btrfs_item_size_nr(leaf, path->slots[0]) /
- BTRFS_CRC32_SIZE) {
- u32 diff = (csum_offset + 1) * BTRFS_CRC32_SIZE;
+ csum_size) {
+ u32 diff = (csum_offset + 1) * csum_size;
diff = diff - btrfs_item_size_nr(leaf, path->slots[0]);
- if (diff != BTRFS_CRC32_SIZE)
+ if (diff != csum_size)
goto insert;
ret = btrfs_extend_item(trans, root, path, diff);
BUG_ON(ret);
@@ -479,10 +486,10 @@ insert:
tmp -= offset & ~((u64)root->sectorsize -1);
tmp >>= root->fs_info->sb->s_blocksize_bits;
tmp = max((u64)1, tmp);
- tmp = min(tmp, (u64)MAX_CSUM_ITEMS(root));
- ins_size = BTRFS_CRC32_SIZE * tmp;
+ tmp = min(tmp, (u64)MAX_CSUM_ITEMS(root, csum_size));
+ ins_size = csum_size * tmp;
} else {
- ins_size = BTRFS_CRC32_SIZE;
+ ins_size = csum_size;
}
ret = btrfs_insert_empty_item(trans, root, path, &file_key,
ins_size);
@@ -497,7 +504,7 @@ csum:
item = btrfs_item_ptr(leaf, path->slots[0], struct btrfs_csum_item);
ret = 0;
item = (struct btrfs_csum_item *)((unsigned char *)item +
- csum_offset * BTRFS_CRC32_SIZE);
+ csum_offset * csum_size);
found:
item_end = btrfs_item_ptr(leaf, path->slots[0], struct btrfs_csum_item);
item_end = (struct btrfs_csum_item *)((unsigned char *)item_end +
@@ -508,14 +515,14 @@ found:
next_sector:
if (!eb_token ||
- (unsigned long)item + BTRFS_CRC32_SIZE >= map_start + map_len) {
+ (unsigned long)item + csum_size >= map_start + map_len) {
int err;
if (eb_token)
unmap_extent_buffer(leaf, eb_token, KM_USER1);
eb_token = NULL;
err = map_private_extent_buffer(leaf, (unsigned long)item,
- BTRFS_CRC32_SIZE,
+ csum_size,
&eb_token, &eb_map,
&map_start, &map_len, KM_USER1);
if (err)
@@ -523,17 +530,17 @@ next_sector:
}
if (eb_token) {
memcpy(eb_token + ((unsigned long)item & (PAGE_CACHE_SIZE - 1)),
- &sector_sum->sum, BTRFS_CRC32_SIZE);
+ &sector_sum->sum, csum_size);
} else {
write_extent_buffer(leaf, &sector_sum->sum,
- (unsigned long)item, BTRFS_CRC32_SIZE);
+ (unsigned long)item, csum_size);
}
total_bytes += root->sectorsize;
sector_sum++;
if (total_bytes < sums->len) {
item = (struct btrfs_csum_item *)((char *)item +
- BTRFS_CRC32_SIZE);
+ csum_size);
if (item < item_end && offset + PAGE_CACHE_SIZE ==
sector_sum->offset) {
offset = sector_sum->offset;
@@ -577,7 +584,8 @@ int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
new_item_span = isize - key.offset;
blocks = (new_item_span + root->sectorsize - 1) >>
root->fs_info->sb->s_blocksize_bits;
- new_item_size = blocks * BTRFS_CRC32_SIZE;
+ new_item_size = blocks *
+ btrfs_super_csum_size(&root->fs_info->super_copy);
if (new_item_size >= btrfs_item_size_nr(leaf, slot))
return 0;
ret = btrfs_truncate_item(trans, root, path, new_item_size, 1);
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index caea9eed9d62..b4da53d55c82 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -714,7 +714,8 @@ static long btrfs_ioctl_clone(struct file *file, unsigned long srcfd,
u64 len = olen;
u64 bs = root->fs_info->sb->s_blocksize;
u64 hint_byte;
-
+ u16 csum_size =
+ btrfs_super_csum_size(&root->fs_info->super_copy);
/*
* TODO:
* - split compressed inline extents. annoying: we need to
@@ -964,7 +965,7 @@ static long btrfs_ioctl_clone(struct file *file, unsigned long srcfd,
int coff, clen;
size = btrfs_item_size_nr(leaf, slot);
- coverslen = (size / BTRFS_CRC32_SIZE) <<
+ coverslen = (size / csum_size) <<
root->fs_info->sb->s_blocksize_bits;
printk("csums for %llu~%llu\n",
key.offset, coverslen);
@@ -981,12 +982,12 @@ static long btrfs_ioctl_clone(struct file *file, unsigned long srcfd,
if (off > key.offset)
coff = ((off - key.offset) >>
root->fs_info->sb->s_blocksize_bits) *
- BTRFS_CRC32_SIZE;
+ csum_size;
clen = size - coff;
if (key.offset + coverslen > off+len)
clen -= ((key.offset+coverslen-off-len) >>
root->fs_info->sb->s_blocksize_bits) *
- BTRFS_CRC32_SIZE;
+ csum_size;
printk(" will dup %d~%d of %d\n",
coff, clen, size);
diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c
index 4fcfc8b1189b..c766649ad453 100644
--- a/fs/btrfs/tree-log.c
+++ b/fs/btrfs/tree-log.c
@@ -929,13 +929,15 @@ static noinline int replay_one_csum(struct btrfs_trans_handle *trans,
int ret;
u32 item_size = btrfs_item_size_nr(eb, slot);
u64 cur_offset;
+ u16 csum_size =
+ btrfs_super_csum_size(&root->fs_info->super_copy);
unsigned long file_bytes;
struct btrfs_ordered_sum *sums;
struct btrfs_sector_sum *sector_sum;
struct inode *inode;
unsigned long ptr;
- file_bytes = (item_size / BTRFS_CRC32_SIZE) * root->sectorsize;
+ file_bytes = (item_size / csum_size) * root->sectorsize;
inode = read_one_inode(root, key->objectid);
if (!inode) {
return -EIO;
@@ -959,10 +961,10 @@ static noinline int replay_one_csum(struct btrfs_trans_handle *trans,
ptr = btrfs_item_ptr_offset(eb, slot);
while(item_size > 0) {
sector_sum->offset = cur_offset;
- read_extent_buffer(eb, &sector_sum->sum, ptr, BTRFS_CRC32_SIZE);
+ read_extent_buffer(eb, &sector_sum->sum, ptr, csum_size);
sector_sum++;
- item_size -= BTRFS_CRC32_SIZE;
- ptr += BTRFS_CRC32_SIZE;
+ item_size -= csum_size;
+ ptr += csum_size;
cur_offset += root->sectorsize;
}
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