From: Darrick J. Wong <djwong@xxxxxxxxxx>
Walk the filesystem to rebuild parent pointer information.
Signed-off-by: Darrick J. Wong <djwong@xxxxxxxxxx>
---
include/xfs_inode.h | 6 ++++++
libxfs/xfs_parent.c | 31 +++++++++++++++++++++++++++++--
libxfs/xfs_parent.h | 4 ++++
3 files changed, 39 insertions(+), 2 deletions(-)
diff --git a/include/xfs_inode.h b/include/xfs_inode.h
index b0bba109..2bbda956 100644
--- a/include/xfs_inode.h
+++ b/include/xfs_inode.h
@@ -175,6 +175,12 @@ static inline struct inode *VFS_I(struct xfs_inode *ip)
return &ip->i_vnode;
}
+/* convert from xfs inode to vfs inode */
+static inline const struct inode *VFS_IC(const struct xfs_inode *ip)
+{
+ return &ip->i_vnode;
+}
+
/* We only have i_size in the xfs inode in userspace */
static inline loff_t i_size_read(struct inode *inode)
{
diff --git a/libxfs/xfs_parent.c b/libxfs/xfs_parent.c
index 1598158f..3ce30860 100644
--- a/libxfs/xfs_parent.c
+++ b/libxfs/xfs_parent.c
@@ -95,11 +95,11 @@ xfs_parent_valuecheck(
static inline void
xfs_init_parent_name_rec(
struct xfs_parent_name_rec *rec,
- struct xfs_inode *ip,
+ const struct xfs_inode *ip,
uint32_t p_diroffset)
{
xfs_ino_t p_ino = ip->i_ino;
- uint32_t p_gen = VFS_I(ip)->i_generation;
+ uint32_t p_gen = VFS_IC(ip)->i_generation;
rec->p_ino = cpu_to_be64(p_ino);
rec->p_gen = cpu_to_be32(p_gen);
@@ -337,3 +337,30 @@ xfs_parent_lookup(
return scr->args.valuelen;
}
+
+/*
+ * Attach the parent pointer (@pptr -> @name) to @ip immediately. Caller must
+ * not have a transaction or hold the ILOCK. The update will not use logged
+ * xattrs. This is for specialized repair functions only. The scratchpad need
+ * not be initialized.
+ */
+int
+xfs_parent_set(
+ struct xfs_inode *ip,
+ const struct xfs_parent_name_irec *pptr,
+ struct xfs_parent_scratch *scr)
+{
+ xfs_parent_irec_to_disk(&scr->rec, NULL, NULL, pptr);
+
+ memset(&scr->args, 0, sizeof(struct xfs_da_args));
+ scr->args.attr_filter = XFS_ATTR_PARENT;
+ scr->args.dp = ip;
+ scr->args.geo = ip->i_mount->m_attr_geo;
+ scr->args.name = (const unsigned char *)&scr->rec;
+ scr->args.namelen = sizeof(struct xfs_parent_name_rec);
+ scr->args.valuelen = pptr->p_namelen;
+ scr->args.value = (void *)pptr->p_name;
+ scr->args.whichfork = XFS_ATTR_FORK;
+
+ return xfs_attr_set(&scr->args);
+}
diff --git a/libxfs/xfs_parent.h b/libxfs/xfs_parent.h
index cd1b1351..effbccdf 100644
--- a/libxfs/xfs_parent.h
+++ b/libxfs/xfs_parent.h
@@ -113,4 +113,8 @@ int xfs_parent_lookup(struct xfs_trans *tp, struct xfs_inode *ip,
const struct xfs_parent_name_irec *pptr, unsigned char *name,
unsigned int namelen, struct xfs_parent_scratch *scratch);
+int xfs_parent_set(struct xfs_inode *ip,
+ const struct xfs_parent_name_irec *pptr,
+ struct xfs_parent_scratch *scratch);
+
#endif /* __XFS_PARENT_H__ */
