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authorMiao Xie <miaox@cn.fujitsu.com>2014-09-12 18:44:03 +0800
committerChris Mason <clm@fb.com>2014-09-17 13:39:01 -0700
commit8b110e393c5a6e72d50fcdf9fa7ed8b647cfdfc9 (patch)
tree36f6b0048c79fd63c55892cd45f0b78e8c0cc15b /fs/btrfs/extent_io.h
parent28e1cc7d1baf8038ae4ad4681c8f3dc94fcd7c00 (diff)
Btrfs: implement repair function when direct read fails
This patch implement data repair function when direct read fails. The detail of the implementation is: - When we find the data is not right, we try to read the data from the other mirror. - When the io on the mirror ends, we will insert the endio work into the dedicated btrfs workqueue, not common read endio workqueue, because the original endio work is still blocked in the btrfs endio workqueue, if we insert the endio work of the io on the mirror into that workqueue, deadlock would happen. - After we get right data, we write it back to the corrupted mirror. - And if the data on the new mirror is still corrupted, we will try next mirror until we read right data or all the mirrors are traversed. - After the above work, we set the uptodate flag according to the result. Signed-off-by: Miao Xie <miaox@cn.fujitsu.com> Signed-off-by: Chris Mason <clm@fb.com>
Diffstat (limited to 'fs/btrfs/extent_io.h')
-rw-r--r--fs/btrfs/extent_io.h5
1 files changed, 4 insertions, 1 deletions
diff --git a/fs/btrfs/extent_io.h b/fs/btrfs/extent_io.h
index bf0597f3a9e7..176a4b1ed520 100644
--- a/fs/btrfs/extent_io.h
+++ b/fs/btrfs/extent_io.h
@@ -341,6 +341,8 @@ struct btrfs_fs_info;
int repair_io_failure(struct inode *inode, u64 start, u64 length, u64 logical,
struct page *page, unsigned int pg_offset,
int mirror_num);
+int clean_io_failure(struct inode *inode, u64 start, struct page *page,
+ unsigned int pg_offset);
int end_extent_writepage(struct page *page, int err, u64 start, u64 end);
int repair_eb_io_failure(struct btrfs_root *root, struct extent_buffer *eb,
int mirror_num);
@@ -371,7 +373,8 @@ int btrfs_check_repairable(struct inode *inode, struct bio *failed_bio,
struct bio *btrfs_create_repair_bio(struct inode *inode, struct bio *failed_bio,
struct io_failure_record *failrec,
struct page *page, int pg_offset, int icsum,
- bio_end_io_t *endio_func);
+ bio_end_io_t *endio_func, void *data);
+int free_io_failure(struct inode *inode, struct io_failure_record *rec);
#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
noinline u64 find_lock_delalloc_range(struct inode *inode,
struct extent_io_tree *tree,