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| author | Chris Mason <chris.mason@oracle.com> | 2008-04-09 16:28:12 -0400 |
|---|---|---|
| committer | Chris Mason <chris.mason@oracle.com> | 2008-09-25 11:04:01 -0400 |
| commit | ce9adaa5a792c2099a83246265eb4055bc38b6b8 (patch) | |
| tree | 3ac03bb73cd3aad0c0b194d387cbb5b136c92fa7 /fs/btrfs/extent_io.h | |
| parent | 728131d8e40c2a47c59ca91a806299c4708029f9 (diff) | |
| download | linux-ce9adaa5a792c2099a83246265eb4055bc38b6b8.tar.gz linux-ce9adaa5a792c2099a83246265eb4055bc38b6b8.tar.bz2 linux-ce9adaa5a792c2099a83246265eb4055bc38b6b8.zip | |
Btrfs: Do metadata checksums for reads via a workqueue
Before, metadata checksumming was done by the callers of read_tree_block,
which would set EXTENT_CSUM bits in the extent tree to show that a given
range of pages was already checksummed and didn't need to be verified
again.
But, those bits could go away via try_to_releasepage, and the end
result was bogus checksum failures on pages that never left the cache.
The new code validates checksums when the page is read. It is a little
tricky because metadata blocks can span pages and a single read may
end up going via multiple bios.
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs/btrfs/extent_io.h')
| -rw-r--r-- | fs/btrfs/extent_io.h | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/fs/btrfs/extent_io.h b/fs/btrfs/extent_io.h index d9f5bc4dbd7f..9d2991d1d3ce 100644 --- a/fs/btrfs/extent_io.h +++ b/fs/btrfs/extent_io.h @@ -13,7 +13,6 @@ #define EXTENT_DEFRAG (1 << 6) #define EXTENT_DEFRAG_DONE (1 << 7) #define EXTENT_BUFFER_FILLED (1 << 8) -#define EXTENT_CSUM (1 << 9) #define EXTENT_IOBITS (EXTENT_LOCKED | EXTENT_WRITEBACK) /* @@ -218,4 +217,7 @@ int map_private_extent_buffer(struct extent_buffer *eb, unsigned long offset, void unmap_extent_buffer(struct extent_buffer *eb, char *token, int km); int invalidate_extent_lru(struct extent_io_tree *tree, u64 start, unsigned long len); +int release_extent_buffer_tail_pages(struct extent_buffer *eb); +int extent_range_uptodate(struct extent_io_tree *tree, + u64 start, u64 end); #endif |