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| author | Qu Wenruo <wqu@suse.com> | 2022-08-24 09:14:07 +0800 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2022-09-26 12:28:01 +0200 |
| commit | e562a8bdf652b010ce2525bcf15d145c9d3932bf (patch) | |
| tree | bee0e81ff35196ee2171835c2ef5fb2e414d68f6 /fs/btrfs/qgroup.h | |
| parent | e71564c0438a1c0cffc5c8eb302ec5d849103b08 (diff) | |
| download | linux-e562a8bdf652b010ce2525bcf15d145c9d3932bf.tar.bz2 | |
btrfs: introduce BTRFS_QGROUP_RUNTIME_FLAG_CANCEL_RESCAN
Introduce a new runtime flag, BTRFS_QGROUP_RUNTIME_FLAG_CANCEL_RESCAN,
which will inform qgroup rescan to cancel its work asynchronously.
This is to address the window when an operation makes qgroup numbers
inconsistent (like qgroup inheriting) while a qgroup rescan is running.
In that case, qgroup inconsistent flag will be cleared when qgroup
rescan finishes.
But we changed the ownership of some extents, which means the rescan is
already meaningless, and the qgroup inconsistent flag should not be
cleared.
With the new flag, each time we set INCONSISTENT flag, we also set this
new flag to inform any running qgroup rescan to exit immediately, and
leaving the INCONSISTENT flag there.
The new runtime flag can only be cleared when a new rescan is started.
Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/qgroup.h')
| -rw-r--r-- | fs/btrfs/qgroup.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/btrfs/qgroup.h b/fs/btrfs/qgroup.h index 0c4dd2a9af96..90d3632c5524 100644 --- a/fs/btrfs/qgroup.h +++ b/fs/btrfs/qgroup.h @@ -100,6 +100,8 @@ * subtree rescan for them. */ +#define BTRFS_QGROUP_RUNTIME_FLAG_CANCEL_RESCAN (1UL << 3) + /* * Record a dirty extent, and info qgroup to update quota on it * TODO: Use kmem cache to alloc it. |