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authorLi Zefan <lizf@cn.fujitsu.com>2011-03-28 08:30:38 +0000
committerChris Mason <chris.mason@oracle.com>2011-04-05 01:19:42 -0400
commitfe3f566cd19bb6d787c92b2e202c85f929abf3ac (patch)
tree216c33bb0ed94e7791141939ea763620576d82b0 /fs/btrfs
parent200da64e0b039f873f0f20481e6a7d056e7cc6c9 (diff)
downloadop-kernel-dev-fe3f566cd19bb6d787c92b2e202c85f929abf3ac.zip
op-kernel-dev-fe3f566cd19bb6d787c92b2e202c85f929abf3ac.tar.gz
Btrfs: Fix oops for defrag with compression turned on
When we defrag a file, whose size can be fit into an inline extent, with compression enabled, the compress type is set to be fs_info->compress_type, which is 0 if the btrfs filesystem is mounted without compress option. This leads to oops. Reported-by: Daniel Blueman <daniel.blueman@gmail.com> Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs/btrfs')
-rw-r--r--fs/btrfs/inode.c17
1 files changed, 8 insertions, 9 deletions
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 0627418..62ae9d5 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -111,6 +111,7 @@ 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;
@@ -125,12 +126,9 @@ 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)
@@ -220,7 +218,7 @@ 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);
@@ -253,7 +251,7 @@ 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);
@@ -432,12 +430,13 @@ 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) {
/*
@@ -791,7 +790,7 @@ 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,
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