btrfs: subpage: do more sanity checks on metadata page dirtying

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For btree_set_page_dirty(), we should also check the extent buffer
sanity for subpage support.

Unlike the regular sector size case, since one page can contain multiple
extent buffers, we need to make sure there is at least one dirty extent
buffer in the page.

So this patch will iterate through the btrfs_subpage::dirty_bitmap
to get the extent buffers, and check if any dirty extent buffer in the page
range has EXTENT_BUFFER_DIRTY and proper refs.

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

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Qu Wenruo 2021-03-25 15:14:39 +08:00 • committed by David Sterba

parent 3470da3b7d

commit 139e8cd325

1 changed files with 41 additions and 6 deletions

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fs/btrfs/disk-io.c

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