[22/23] xfs: online repair of directories

Commit Message

Darrick J. Wong Feb. 16, 2023, 8:47 p.m. UTC

From: Darrick J. Wong <[e-mail]>

If a directory looks like it's in bad shape, try to sift through the
rubble to find whatever directory entries we can, scan the directory
tree for the parent (if needed), stage the new directory contents in a
temporary file and use the atomic extent swapping mechanism to commit
the results in bulk.  As a side effect of this patch, directory
inactivation will be able to purge any leftover dir blocks.

Signed-off-by: Darrick J. Wong <[e-mail]>
---
 fs/xfs/scrub/tempfile.c |   13 +++++++++++++
 fs/xfs/scrub/tempfile.h |    2 ++
 2 files changed, 15 insertions(+)

Patch

diff --git a/fs/xfs/scrub/tempfile.c b/fs/xfs/scrub/tempfile.c
index 8f80f1c2555c..91875d4bb67f 100644
--- a/fs/xfs/scrub/tempfile.c
+++ b/fs/xfs/scrub/tempfile.c
@@ -228,3 +228,16 @@  xrep_tempfile_rele(
 	xchk_irele(sc, sc->tempip);
 	sc->tempip = NULL;
 }
+
+/* Decide if a given XFS inode is a temporary file for a repair. */
+bool
+xrep_is_tempfile(
+	const struct xfs_inode	*ip)
+{
+	const struct inode	*inode = &ip->i_vnode;
+
+	if (IS_PRIVATE(inode) && !(inode->i_opflags & IOP_XATTR))
+		return true;
+
+	return false;
+}
diff --git a/fs/xfs/scrub/tempfile.h b/fs/xfs/scrub/tempfile.h
index f00a9ce43a32..e2f493b5d3d9 100644
--- a/fs/xfs/scrub/tempfile.h
+++ b/fs/xfs/scrub/tempfile.h
@@ -16,11 +16,13 @@  void xrep_tempfile_iounlock(struct xfs_scrub *sc);
 void xrep_tempfile_ilock(struct xfs_scrub *sc);
 bool xrep_tempfile_ilock_nowait(struct xfs_scrub *sc);
 void xrep_tempfile_iunlock(struct xfs_scrub *sc);
+bool xrep_is_tempfile(const struct xfs_inode *ip);
 #else
 static inline void xrep_tempfile_iolock_both(struct xfs_scrub *sc)
 {
 	xchk_ilock(sc, XFS_IOLOCK_EXCL);
 }
+# define xrep_is_tempfile(ip)		(false)
 # define xrep_tempfile_rele(sc)
 #endif /* CONFIG_XFS_ONLINE_REPAIR */