btrfs: do not BUG_ON() on tree mod log failure at balance_level()

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commit 39020d8abc upstream.

At balance_level(), instead of doing a BUG_ON() in case we fail to record
tree mod log operations, do a transaction abort and return the error to
the callers. There's really no need for the BUG_ON() as we can release
all resources in this context, and we have to abort because other future
tree searches that use the tree mod log (btrfs_search_old_slot()) may get
inconsistent results if other operations modify the tree after that
failure and before the tree mod log based search.

CC: stable@vger.kernel.org # 5.4+
Reviewed-by: Qu Wenruo <wqu@suse.com>
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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Filipe Manana 2023-06-08 11:27:41 +01:00 • committed by Greg Kroah-Hartman

parent 8ce9139aea

commit 532da3822a

1 changed files with 14 additions and 3 deletions

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fs/btrfs/ctree.c

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