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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>
This commit is contained in:
Li Zefan 2011-03-28 08:30:38 +00:00 committed by Chris Mason
parent 200da64e0b
commit fe3f566cd1
1 changed files with 8 additions and 9 deletions
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17
fs/btrfs/inode.c
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@ -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 @@ static noinline int insert_inline_extent(struct btrfs_trans_handle *trans,
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 @@ static noinline int compress_file_range(struct inode *inode,
* 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,