btrfs: make validate_extent_map() catch ram_bytes mismatch

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Previously validate_extent_map() is only to catch bugs related to
extent_map member cleanups.

But with recent btrfs-check enhancement to catch ram_bytes mismatch with
disk_num_bytes, it would be much better to catch such extent maps
earlier.

So this patch adds extra ram_bytes validation for extent maps.

Please note that, older filesystems with such mismatch won't trigger this error:

- extent_map::ram_bytes is already fixed
  Previous patch has already fixed the ram_bytes for affected file
  extents.

So this enhanced sanity check should not affect end users.

Reviewed-by: Filipe Manana <fdmanana@suse.com>
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 2024-06-25 13:34:33 +09:30 • committed by David Sterba

parent 88e2e6d724

commit 1b87d26add

1 changed files with 5 additions and 0 deletions

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fs/btrfs/extent_map.c

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