From: Darrick J. Wong <djwong@xxxxxxxxxx>
Delete xattrs that have ATTR_PARENT set but are so garbage that they
clearly aren't parent pointers.
Signed-off-by: Darrick J. Wong <djwong@xxxxxxxxxx>
---
repair/pptr.c | 114 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 111 insertions(+), 3 deletions(-)
diff --git a/repair/pptr.c b/repair/pptr.c
index d1e7f5ee..695177ce 100644
--- a/repair/pptr.c
+++ b/repair/pptr.c
@@ -174,6 +174,23 @@ struct file_scan {
/* Does this file have garbage xattrs with ATTR_PARENT set? */
bool have_garbage;
+
+ /* xattrs that we have to remove from this file */
+ struct xfs_slab *garbage_xattr_recs;
+
+ /* attr names associated with garbage_xattr_recs */
+ struct xfblob *garbage_xattr_names;
+};
+
+struct garbage_xattr {
+ /* xfs_da_args.attr_filter for the attribute being removed */
+ unsigned int attr_filter;
+
+ /* attribute name length */
+ unsigned int attrnamelen;
+
+ /* cookie for the attribute name */
+ xfblob_cookie attrname_cookie;
};
/* Global names storage file. */
@@ -330,7 +347,63 @@ add_parent_ptr(
(unsigned long long)ag_pptr.name_cookie);
}
-/* Schedule this extended attribute for deletion. */
+/* Remove garbage extended attributes that have ATTR_PARENT set. */
+static void
+remove_garbage_xattrs(
+ struct xfs_inode *ip,
+ struct file_scan *fscan)
+{
+ struct xfs_slab_cursor *cur;
+ struct garbage_xattr *ga;
+ int error;
+
+ error = -init_slab_cursor(fscan->garbage_xattr_recs, NULL, &cur);
+ if (error)
+ do_error(_("init garbage xattr cursor failed: %s\n"),
+ strerror(error));
+
+ while ((ga = pop_slab_cursor(cur)) != NULL) {
+ struct xfs_da_args args = {
+ .dp = ip,
+ .attr_filter = ga->attr_filter,
+ .namelen = ga->attrnamelen,
+ };
+ void *buf;
+
+ buf = malloc(ga->attrnamelen);
+ if (!buf)
+ do_error(
+ _("allocating %u bytes to remove ino %llu garbage xattr failed: %s\n"),
+ ga->attrnamelen,
+ (unsigned long long)ip->i_ino,
+ strerror(errno));
+
+ error = -xfblob_load(fscan->garbage_xattr_names,
+ ga->attrname_cookie, buf, ga->attrnamelen);
+ if (error)
+ do_error(
+ _("loading garbage xattr name failed: %s\n"),
+ strerror(error));
+
+ args.name = buf;
+ error = -libxfs_attr_set(&args);
+ if (error)
+ do_error(
+ _("removing ino %llu garbage xattr failed: %s\n"),
+ (unsigned long long)ip->i_ino,
+ strerror(error));
+
+ free(buf);
+ }
+
+ free_slab_cursor(&cur);
+
+ free_slab(&fscan->garbage_xattr_recs);
+ xfblob_destroy(fscan->garbage_xattr_names);
+ fscan->garbage_xattr_names = NULL;
+}
+
+/* Schedule this ATTR_PARENT extended attribute for deletion. */
static void
record_garbage_xattr(
struct xfs_inode *ip,
@@ -339,6 +412,13 @@ record_garbage_xattr(
const void *name,
unsigned int namelen)
{
+ struct garbage_xattr garbage_xattr = {
+ .attr_filter = attr_filter,
+ .attrnamelen = namelen,
+ };
+ struct xfs_mount *mp = ip->i_mount;
+ int error;
+
if (no_modify) {
if (!fscan->have_garbage)
do_warn(
@@ -349,13 +429,38 @@ record_garbage_xattr(
}
if (fscan->have_garbage)
- return;
+ goto stuffit;
fscan->have_garbage = true;
do_warn(
_("deleting garbage parent pointer extended attributes in ino %llu\n"),
(unsigned long long)ip->i_ino);
- /* XXX do the work */
+
+ error = -init_slab(&fscan->garbage_xattr_recs,
+ sizeof(struct garbage_xattr));
+ if (error)
+ do_error(_("init garbage xattr recs failed: %s\n"),
+ strerror(error));
+
+ error = -xfblob_create(mp, "garbage xattr names",
+ &fscan->garbage_xattr_names);
+ if (error)
+ do_error("init garbage xattr names failed: %s\n",
+ strerror(error));
+
+stuffit:
+ error = -xfblob_store(fscan->garbage_xattr_names,
+ &garbage_xattr.attrname_cookie, name, namelen);
+ if (error)
+ do_error(_("storing ino %llu garbage xattr failed: %s\n"),
+ (unsigned long long)ip->i_ino,
+ strerror(error));
+
+ error = -slab_add(fscan->garbage_xattr_recs, &garbage_xattr);
+ if (error)
+ do_error(_("storing ino %llu garbage xattr rec failed: %s\n"),
+ (unsigned long long)ip->i_ino,
+ strerror(error));
}
/* Decide if this is a directory parent pointer and stash it if so. */
@@ -763,6 +868,9 @@ check_file_parent_ptrs(
goto out_free;
}
+ if (!no_modify && fscan->have_garbage)
+ remove_garbage_xattrs(ip, fscan);
+
crosscheck_file_parent_ptrs(ip, fscan);
out_free:
