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| author |   Darrick J. Wong <djwong@kernel.org> | 2024-04-22 09:48:05 -0700 |
|---|---|---|
| committer | Darrick J. Wong <djwong@kernel.org> | 2024-04-23 07:47:03 -0700 |
| commit | 77ede5f44b0d86c2ec812442846f512884009766 (patch) | |
| tree | 3eb3b5850649190c24320581f76395620873935f /fs/xfs/scrub/trace.h | |
| parent | xfs: deferred scrub of parent pointers (diff) | |
| download | wireguard-linux-77ede5f44b0d86c2ec812442846f512884009766.tar.xz wireguard-linux-77ede5f44b0d86c2ec812442846f512884009766.zip | |
xfs: walk directory parent pointers to determine backref count
If the filesystem has parent pointers enabled, walk the parent pointers
of subdirectories to determine the true backref count. In theory each
subdir should have a single parent reachable via dotdot, but in the case
of (corrupt) subdirs with multiple parents, we need to keep the link
counts high enough that the directory loop detector will be able to
correct the multiple parents problems.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to '')
| -rw-r--r-- | fs/xfs/scrub/trace.h | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/fs/xfs/scrub/trace.h b/fs/xfs/scrub/trace.h index 97a106519b53..3e726610b9e3 100644 --- a/fs/xfs/scrub/trace.h +++ b/fs/xfs/scrub/trace.h @@ -26,6 +26,7 @@ struct xchk_iscan; struct xchk_nlink; struct xchk_fscounters; struct xfs_rmap_update_params; +struct xfs_parent_rec; /* * ftrace's __print_symbolic requires that all enum values be wrapped in the @@ -1363,6 +1364,33 @@ TRACE_EVENT(xchk_nlinks_collect_dirent, __get_str(name)) ); +TRACE_EVENT(xchk_nlinks_collect_pptr, + TP_PROTO(struct xfs_mount *mp, struct xfs_inode *dp, + const struct xfs_name *name, + const struct xfs_parent_rec *pptr), + TP_ARGS(mp, dp, name, pptr), + TP_STRUCT__entry( + __field(dev_t, dev) + __field(xfs_ino_t, dir) + __field(xfs_ino_t, ino) + __field(unsigned int, namelen) + __dynamic_array(char, name, name->len) + ), + TP_fast_assign( + __entry->dev = mp->m_super->s_dev; + __entry->dir = dp->i_ino; + __entry->ino = be64_to_cpu(pptr->p_ino); + __entry->namelen = name->len; + memcpy(__get_str(name), name->name, name->len); + ), + TP_printk("dev %d:%d dir 0x%llx -> ino 0x%llx name '%.*s'", + MAJOR(__entry->dev), MINOR(__entry->dev), + __entry->dir, + __entry->ino, + __entry->namelen, + __get_str(name)) +); + TRACE_EVENT(xchk_nlinks_collect_metafile, TP_PROTO(struct xfs_mount *mp, xfs_ino_t ino), TP_ARGS(mp, ino), |