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authorJan Schmidt <list.btrfs@jan-o-sch.net>2011-07-22 15:41:52 +0200
committerJan Schmidt <list.btrfs@jan-o-sch.net>2011-09-29 13:38:42 +0200
commit4a54c8c165b66300830a67349fc7595e3fc442f7 (patch)
treefea3a5e86c2ee9304711e18b2557912166d6d52f /fs/btrfs/extent_io.h
parent2774b2ca3d49124bf1ae89e8d575b3dab4221266 (diff)
btrfs: Moved repair code from inode.c to extent_io.c
The raid-retry code in inode.c can be generalized so that it works for metadata as well. Thus, this patch moves it to extent_io.c and makes the raid-retry code a raid-repair code. Repair works that way: Whenever a read error occurs and we have more mirrors to try, note the failed mirror, and retry another. If we find a good one, check if we did note a failure earlier and if so, do not allow the read to complete until after the bad sector was written with the good data we just fetched. As we have the extent locked while reading, no one can change the data in between. Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net>
Diffstat (limited to 'fs/btrfs/extent_io.h')
-rw-r--r--fs/btrfs/extent_io.h10
1 files changed, 9 insertions, 1 deletions
diff --git a/fs/btrfs/extent_io.h b/fs/btrfs/extent_io.h
index 435d454b992..a8e20b67292 100644
--- a/fs/btrfs/extent_io.h
+++ b/fs/btrfs/extent_io.h
@@ -68,7 +68,7 @@ struct extent_io_ops {
unsigned long bio_flags);
int (*readpage_io_hook)(struct page *page, u64 start, u64 end);
int (*readpage_io_failed_hook)(struct bio *bio, struct page *page,
- u64 start, u64 end,
+ u64 start, u64 end, u64 failed_mirror,
struct extent_state *state);
int (*writepage_io_failed_hook)(struct bio *bio, struct page *page,
u64 start, u64 end,
@@ -252,6 +252,8 @@ void free_extent_buffer(struct extent_buffer *eb);
int read_extent_buffer_pages(struct extent_io_tree *tree,
struct extent_buffer *eb, u64 start, int wait,
get_extent_t *get_extent, int mirror_num);
+unsigned long num_extent_pages(u64 start, u64 len);
+struct page *extent_buffer_page(struct extent_buffer *eb, unsigned long i);
static inline void extent_buffer_get(struct extent_buffer *eb)
{
@@ -301,4 +303,10 @@ int extent_clear_unlock_delalloc(struct inode *inode,
struct bio *
btrfs_bio_alloc(struct block_device *bdev, u64 first_sector, int nr_vecs,
gfp_t gfp_flags);
+
+struct btrfs_mapping_tree;
+
+int repair_io_failure(struct btrfs_mapping_tree *map_tree, u64 start,
+ u64 length, u64 logical, struct page *page,
+ int mirror_num);
#endif