From: Darrick J. Wong <djwong@xxxxxxxxxx>
Update the ondisk parent pointer records as necessary.
Signed-off-by: Darrick J. Wong <djwong@xxxxxxxxxx>
Reviewed-by: Christoph Hellwig <hch@xxxxxx>
---
libxfs/libxfs_api_defs.h | 2 +
repair/pptr.c | 88 ++++++++++++++++++++++++++++++++++++++++++++--
2 files changed, 87 insertions(+), 3 deletions(-)
diff --git a/libxfs/libxfs_api_defs.h b/libxfs/libxfs_api_defs.h
index e12f0a40b..df316727b 100644
--- a/libxfs/libxfs_api_defs.h
+++ b/libxfs/libxfs_api_defs.h
@@ -209,8 +209,10 @@
#define xfs_parent_hashval libxfs_parent_hashval
#define xfs_parent_lookup libxfs_parent_lookup
#define xfs_parent_removename libxfs_parent_removename
+#define xfs_parent_set libxfs_parent_set
#define xfs_parent_start libxfs_parent_start
#define xfs_parent_from_attr libxfs_parent_from_attr
+#define xfs_parent_unset libxfs_parent_unset
#define xfs_perag_get libxfs_perag_get
#define xfs_perag_hold libxfs_perag_hold
#define xfs_perag_put libxfs_perag_put
diff --git a/repair/pptr.c b/repair/pptr.c
index 61466009d..94d6d8346 100644
--- a/repair/pptr.c
+++ b/repair/pptr.c
@@ -673,6 +673,44 @@ load_file_pptr_name(
name, file_pptr->namelen);
}
+/* Add an on disk parent pointer to a file. */
+static int
+add_file_pptr(
+ struct xfs_inode *ip,
+ const struct ag_pptr *ag_pptr,
+ const unsigned char *name)
+{
+ struct xfs_name xname = {
+ .name = name,
+ .len = ag_pptr->namelen,
+ };
+ struct xfs_parent_rec pptr_rec = { };
+ struct xfs_da_args scratch;
+
+ xfs_parent_rec_init(&pptr_rec, ag_pptr->parent_ino,
+ ag_pptr->parent_gen);
+ return -libxfs_parent_set(ip, ip->i_ino, &xname, &pptr_rec, &scratch);
+}
+
+/* Remove an on disk parent pointer from a file. */
+static int
+remove_file_pptr(
+ struct xfs_inode *ip,
+ const struct file_pptr *file_pptr,
+ const unsigned char *name)
+{
+ struct xfs_name xname = {
+ .name = name,
+ .len = file_pptr->namelen,
+ };
+ struct xfs_parent_rec pptr_rec = { };
+ struct xfs_da_args scratch;
+
+ xfs_parent_rec_init(&pptr_rec, file_pptr->parent_ino,
+ file_pptr->parent_gen);
+ return -libxfs_parent_unset(ip, ip->i_ino, &xname, &pptr_rec, &scratch);
+}
+
/* Remove all pptrs from @ip. */
static void
clear_all_pptrs(
@@ -729,7 +767,16 @@ add_missing_parent_ptr(
name);
}
- /* XXX actually do the work */
+ error = add_file_pptr(ip, ag_pptr, name);
+ if (error)
+ do_error(
+ _("adding ino %llu pptr (ino %llu gen 0x%x name '%.*s') failed: %s\n"),
+ (unsigned long long)ip->i_ino,
+ (unsigned long long)ag_pptr->parent_ino,
+ ag_pptr->parent_gen,
+ ag_pptr->namelen,
+ name,
+ strerror(error));
}
/* Remove @file_pptr from @ip. */
@@ -771,7 +818,16 @@ remove_incorrect_parent_ptr(
file_pptr->namelen,
name);
- /* XXX actually do the work */
+ error = remove_file_pptr(ip, file_pptr, name);
+ if (error)
+ do_error(
+ _("removing ino %llu pptr (ino %llu gen 0x%x name '%.*s') failed: %s\n"),
+ (unsigned long long)ip->i_ino,
+ (unsigned long long)file_pptr->parent_ino,
+ file_pptr->parent_gen,
+ file_pptr->namelen,
+ name,
+ strerror(error));
}
/*
@@ -851,7 +907,33 @@ compare_parent_ptrs(
ag_pptr->namelen,
name1);
- /* XXX do the work */
+ /* Remove the parent pointer that we don't want. */
+ error = remove_file_pptr(ip, file_pptr, name2);
+ if (error)
+ do_error(
+_("erasing ino %llu pptr (ino %llu gen 0x%x name '%.*s') failed: %s\n"),
+ (unsigned long long)ip->i_ino,
+ (unsigned long long)file_pptr->parent_ino,
+ file_pptr->parent_gen,
+ file_pptr->namelen,
+ name2,
+ strerror(error));
+
+ /*
+ * Add the parent pointer that we do want. It's possible that this
+ * parent pointer already exists but we haven't gotten that far in the
+ * scan, so we'll keep going on EEXIST.
+ */
+ error = add_file_pptr(ip, ag_pptr, name1);
+ if (error && error != EEXIST)
+ do_error(
+ _("updating ino %llu pptr (ino %llu gen 0x%x name '%.*s') failed: %s\n"),
+ (unsigned long long)ip->i_ino,
+ (unsigned long long)ag_pptr->parent_ino,
+ ag_pptr->parent_gen,
+ ag_pptr->namelen,
+ name1,
+ strerror(error));
}
static int
