btrfs: introduce helpers for subpage ordered status

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This patch introduces the following functions to handle btrfs subpage
ordered (Private2) status:

- btrfs_subpage_set_ordered()
- btrfs_subpage_clear_ordered()
- btrfs_subpage_test_ordered()
  These helpers can only be called when the range is ensured to be
  inside the page.

- btrfs_page_set_ordered()
- btrfs_page_clear_ordered()
- btrfs_page_test_ordered()
  These helpers can handle both regular sector size and subpage without
  problem.

These functions are here to coordinate btrfs_invalidatepage() with
btrfs_writepage_endio_finish_ordered(), to make sure only one of those
functions can finish the ordered extent.

Tested-by: Ritesh Harjani <riteshh@linux.ibm.com> # [ppc64]
Tested-by: Anand Jain <anand.jain@oracle.com> # [aarch64]
Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

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Qu Wenruo 2021-05-31 16:50:45 +08:00 • committed by David Sterba

parent 1e1de38792

commit 6f17400bd9

2 changed files with 33 additions and 0 deletions

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29

fs/btrfs/subpage.c

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4

fs/btrfs/subpage.h

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