xfs: attribute scrub should use seen_enough to pass error values

When we're iterating all the attributes using the built-in xattr
iterator, we can use the seen_enough variable to pass error codes back
to the main scrub function instead of flattening them into 0/1.  This
will be used in a more exciting fashion in upcoming patches.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>

2 files changed, 13 insertions, 3 deletions

diff --git a/fs/xfs/libxfs/xfs_attr.h b/fs/xfs/libxfs/xfs_attr.h
index 3b0dce06e454..ff28ebf3b635 100644
--- a/fs/xfs/libxfs/xfs_attr.h
+++ b/fs/xfs/libxfs/xfs_attr.h
@@ -112,7 +112,13 @@ typedef struct xfs_attr_list_context {
         struct xfs_inode                *dp;            /* inode */
         struct attrlist_cursor_kern     *cursor;        /* position in list */
         char                            *alist;         /* output buffer */
-        int                             seen_enough;    /* T/F: seen enough of list? */
+
+        /*
+         * Abort attribute list iteration if non-zero.  Can be used to pass
+         * error values to the xfs_attr_list caller.
+         */
+        int                             seen_enough;
+
         ssize_t                         count;          /* num used entries */
         int                             dupcnt;         /* count dup hashvals seen */
         int                             bufsize;        /* total buffer size */
diff --git a/fs/xfs/scrub/attr.c b/fs/xfs/scrub/attr.c
index 099a28308815..70f025284c42 100644
--- a/fs/xfs/scrub/attr.c
+++ b/fs/xfs/scrub/attr.c
@@ -73,7 +73,7 @@ xchk_xattr_listent(
         sx = container_of(context, struct xchk_xattr, context);
 
         if (xchk_should_terminate(sx->sc, &error)) {
-                context->seen_enough = 1;
+                context->seen_enough = error;
                 return;
         }
 
@@ -115,7 +115,7 @@ xchk_xattr_listent(
                                              args.blkno);
 fail_xref:
         if (sx->sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)
-                context->seen_enough = 1;
+                context->seen_enough = XFS_ITER_ABORT;
         return;
 }
 
@@ -454,6 +454,10 @@ xchk_xattr(
         error = xfs_attr_list_int_ilocked(&sx.context);
         if (!xchk_fblock_process_error(sc, XFS_ATTR_FORK, 0, &error))
                 goto out;
+
+        /* Did our listent function try to return any errors? */
+        if (sx.context.seen_enough < 0)
+                error = sx.context.seen_enough;
 out:
         return error;
 }