Filipe Manana d5e09e385e
btrfs: abort transaction on generation mismatch when marking eb as dirty ...
[ Upstream commit 50564b651d01c19ce732819c5b3c3fd60707188e ]
When marking an extent buffer as dirty, at btrfs_mark_buffer_dirty(),
we check if its generation matches the running transaction and if not we
just print a warning. Such mismatch is an indicator that something really
went wrong and only printing a warning message (and stack trace) is not
enough to prevent a corruption. Allowing a transaction to commit with such
an extent buffer will trigger an error if we ever try to read it from disk
due to a generation mismatch with its parent generation.
So abort the current transaction with -EUCLEAN if we notice a generation
mismatch. For this we need to pass a transaction handle to
btrfs_mark_buffer_dirty() which is always available except in test code,
in which case we can pass NULL since it operates on dummy extent buffers
and all test roots have a single node/leaf (root node at level 0).
Signed-off-by: Filipe Manana <fdmanana@suse.com >
Reviewed-by: David Sterba <dsterba@suse.com >
Signed-off-by: David Sterba <dsterba@suse.com >
Signed-off-by: Sasha Levin <sashal@kernel.org >
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d5e09e385e