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>

diff --git a/fs/xfs/libxfs/xfs_attr.h b/fs/xfs/libxfs/xfs_attr.h
index 3b0dce0..ff28ebf 100644 (file)
--- 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 099a283..70f0252 100644 (file)
--- 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;
 }