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[ Upstream commit 03ddb19d2e ]
We can either fail to find a csum entry at all and return -ENOENT, or we
can find a range that is close, but return -EFBIG. In essence these
both mean the same thing when we are doing a lookup for a csum in an
existing range, we didn't find a csum. We want to treat both of these
errors the same way, complain loudly that there wasn't a csum. This
currently happens anyway because we do
count = search_csum_tree();
if (count <= 0) {
// reloc and error handling
}
However it forces us to incorrectly treat EIO or ENOMEM errors as on
disk corruption. Fix this by returning 0 if we get either -ENOENT or
-EFBIG from btrfs_lookup_csum() so we can do proper error handling.
Reviewed-by: Boris Burkov <boris@bur.io>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
c78bada18a