diff options
| author | Darrick J. Wong <djwong@kernel.org> | 2023-04-11 18:59:55 -0700 |
|---|---|---|
| committer | Darrick J. Wong <djwong@kernel.org> | 2023-04-11 18:59:55 -0700 |
| commit | 9b2e5a234c89f097ec36f922763dfa1465dc06f8 (patch) | |
| tree | 70dd0e29d57d54b4bcafdd8516f70281d325ed75 /fs/xfs/libxfs/xfs_ag.h | |
| parent | 00e7b3bac1dc8961bd5aa9d39e79131c6bd81181 (diff) | |
xfs: create traced helper to get extra perag referencespass-perag-refs-6.4_2023-04-12pass-perag-refs-6.4_2023-04-11
There are a few places in the XFS codebase where a caller has either an
active or a passive reference to a perag structure and wants to give
a passive reference to some other piece of code. Btree cursor creation
and inode walks are good examples of this. Replace the open-coded logic
with a helper to do this.
The new function adds a few safeguards -- it checks that there's at
least one reference to the perag structure passed in, and it records the
refcount bump in the ftrace information. This makes it much easier to
debug perag refcounting problems.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Diffstat (limited to 'fs/xfs/libxfs/xfs_ag.h')
| -rw-r--r-- | fs/xfs/libxfs/xfs_ag.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/xfs/libxfs/xfs_ag.h b/fs/xfs/libxfs/xfs_ag.h index 5e18536dfdce..8092eaba977d 100644 --- a/fs/xfs/libxfs/xfs_ag.h +++ b/fs/xfs/libxfs/xfs_ag.h @@ -134,6 +134,7 @@ void xfs_free_perag(struct xfs_mount *mp); struct xfs_perag *xfs_perag_get(struct xfs_mount *mp, xfs_agnumber_t agno); struct xfs_perag *xfs_perag_get_tag(struct xfs_mount *mp, xfs_agnumber_t agno, unsigned int tag); +struct xfs_perag *xfs_perag_hold(struct xfs_perag *pag); void xfs_perag_put(struct xfs_perag *pag); /* Active AG references */ |