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authorJosef Bacik <josef@redhat.com>2012-04-16 09:42:26 -0400
committerDavid Sterba <dsterba@suse.cz>2012-04-18 19:22:30 +0200
commit5cf1ab56133ad7b712673c071b439d4a555a2d1e (patch)
treec7b301296750707f47487f508398f1baec81f48b /fs/btrfs/extent_io.h
parent48d282326b3ce5f435835f5fb0e3231c399f4f9a (diff)
Btrfs: always store the mirror we read the eb from
A user reported a panic where we were trying to fix a bad mirror but the mirror number we were giving was 0, which is invalid. This is because we don't do the transid verification until after the read, so as far as the read code is concerned the read was a success. So instead store the mirror we read from so that if there is some failure post read we know which mirror to try next and which mirror needs to be fixed if we find a good copy of the block. Thanks, Signed-off-by: Josef Bacik <josef@redhat.com>
Diffstat (limited to 'fs/btrfs/extent_io.h')
-rw-r--r--fs/btrfs/extent_io.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/btrfs/extent_io.h b/fs/btrfs/extent_io.h
index faf10eb57f7..b516c3b8dec 100644
--- a/fs/btrfs/extent_io.h
+++ b/fs/btrfs/extent_io.h
@@ -79,7 +79,7 @@ struct extent_io_ops {
u64 start, u64 end,
struct extent_state *state);
int (*readpage_end_io_hook)(struct page *page, u64 start, u64 end,
- struct extent_state *state);
+ struct extent_state *state, int mirror);
int (*writepage_end_io_hook)(struct page *page, u64 start, u64 end,
struct extent_state *state, int uptodate);
void (*set_bit_hook)(struct inode *inode, struct extent_state *state,
@@ -135,7 +135,7 @@ struct extent_buffer {
spinlock_t refs_lock;
atomic_t refs;
atomic_t io_pages;
- int failed_mirror;
+ int read_mirror;
struct list_head leak_list;
struct rcu_head rcu_head;
pid_t lock_owner;