btrfs: handle errors properly inside btrfs_submit_compressed_write()

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Just like btrfs_submit_compressed_read(), there are quite some BUG_ON()s
inside btrfs_submit_compressed_write() for the bio submission path.

Fix them using the same method:

- For last bio, just endio the bio
  As in that case, one of the endio function of all these submitted bio
  will be able to free the compressed_bio

- For half-submitted bio, wait and finish the compressed_bio manually
  In this case, as long as all other bio finish, we're the only one
  referring the compressed bio, and can manually finish it.

Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

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This commit is contained in:

Qu Wenruo 2021-09-27 15:21:51 +08:00 • committed by David Sterba

parent 86ccbb4d2a

commit 6853c64a6e

1 changed files with 62 additions and 36 deletions

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fs/btrfs/compression.c

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