btrfs: make csum_tree_block() handle node smaller than page

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For subpage size support, metadata blocks of nodesize are smaller than
one page and this needs to be handled when calculating the checksum.

The checksummed start and length need to be adjusted but only for the
first page:

- start is simply offset in the page

- length is nodesize (subpage) or PAGE_SIZE for all other cases

Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.com>
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 2020-11-03 21:30:47 +08:00 • committed by David Sterba

parent 2f4d60dfae

commit a26663e7a2

1 changed files with 3 additions and 2 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

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fs/btrfs/disk-io.c

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