svn commit: r211507 - stable/8/sys/fs/devfs

[Jaakko Heinonen]

Author: jh
Date: Thu Aug 19 15:33:43 2010
New Revision: 211507
URL: http://svn.freebsd.org/changeset/base/211507

Log:
  MFC r208951:
  
  Add a new function devfs_parent_dirent() for resolving devfs parent
  directory entry. Use the new function in devfs_fqpn(), devfs_lookupx()
  and devfs_vptocnp() instead of manually resolving the parent entry.

Modified:
  stable/8/sys/fs/devfs/devfs.h
  stable/8/sys/fs/devfs/devfs_devs.c
  stable/8/sys/fs/devfs/devfs_vnops.c
Directory Properties:
  stable/8/sys/   (props changed)
  stable/8/sys/amd64/include/xen/   (props changed)
  stable/8/sys/cam/   (props changed)
  stable/8/sys/cddl/contrib/opensolaris/   (props changed)
  stable/8/sys/contrib/dev/acpica/   (props changed)
  stable/8/sys/contrib/pf/   (props changed)
  stable/8/sys/dev/xen/xenpci/   (props changed)

Modified: stable/8/sys/fs/devfs/devfs.h
==============================================================================
--- stable/8/sys/fs/devfs/devfs.h	Thu Aug 19 13:24:13 2010	(r211506)
+++ stable/8/sys/fs/devfs/devfs.h	Thu Aug 19 15:33:43 2010	(r211507)
@@ -180,6 +180,7 @@ void devfs_populate (struct devfs_mount 
 void devfs_cleanup (struct devfs_mount *dm);
 void devfs_unmount_final(struct devfs_mount *mp);
 struct devfs_dirent *devfs_newdirent (char *name, int namelen);
+struct devfs_dirent *devfs_parent_dirent(struct devfs_dirent *de);
 struct devfs_dirent *devfs_vmkdir (struct devfs_mount *, char *name, int namelen, struct devfs_dirent *dotdot, u_int inode);
 struct devfs_dirent *devfs_find (struct devfs_dirent *dd, const char *name, int namelen);
 

Modified: stable/8/sys/fs/devfs/devfs_devs.c
==============================================================================
--- stable/8/sys/fs/devfs/devfs_devs.c	Thu Aug 19 13:24:13 2010	(r211506)
+++ stable/8/sys/fs/devfs/devfs_devs.c	Thu Aug 19 15:33:43 2010	(r211507)
@@ -195,6 +195,26 @@ devfs_newdirent(char *name, int namelen)
 }
 
 struct devfs_dirent *
+devfs_parent_dirent(struct devfs_dirent *de)
+{
+
+	if (de->de_dirent->d_type != DT_DIR)
+		return (de->de_dir);
+
+	if (de->de_flags & (DE_DOT | DE_DOTDOT))
+		return (NULL);
+
+	de = TAILQ_FIRST(&de->de_dlist);	/* "." */
+	if (de == NULL)
+		return (NULL);
+	de = TAILQ_NEXT(de, de_list);		/* ".." */
+	if (de == NULL)
+		return (NULL);
+
+	return (de->de_dir);
+}
+
+struct devfs_dirent *
 devfs_vmkdir(struct devfs_mount *dmp, char *name, int namelen, struct devfs_dirent *dotdot, u_int inode)
 {
 	struct devfs_dirent *dd;

Modified: stable/8/sys/fs/devfs/devfs_vnops.c
==============================================================================
--- stable/8/sys/fs/devfs/devfs_vnops.c	Thu Aug 19 13:24:13 2010	(r211506)
+++ stable/8/sys/fs/devfs/devfs_vnops.c	Thu Aug 19 15:33:43 2010	(r211507)
@@ -230,9 +230,11 @@ devfs_vptocnp(struct vop_vptocnp_args *a
 		goto finished;
 	}
 	*buflen = i;
-	de = TAILQ_FIRST(&de->de_dlist);	/* "." */
-	de = TAILQ_NEXT(de, de_list);		/* ".." */
-	de = de->de_dir;
+	de = devfs_parent_dirent(de);
+	if (de == NULL) {
+		error = ENOENT;
+		goto finished;
+	}
 	mtx_lock(&devfs_de_interlock);
 	*dvp = de->de_vnode;
 	if (*dvp != NULL) {
@@ -278,9 +280,9 @@ devfs_fqpn(char *buf, struct vnode *dvp,
 			 return (NULL);
 		bcopy(de->de_dirent->d_name, buf + i,
 		    de->de_dirent->d_namlen);
-		de = TAILQ_FIRST(&de->de_dlist);	/* "." */
-		de = TAILQ_NEXT(de, de_list);		/* ".." */
-		de = de->de_dir;
+		de = devfs_parent_dirent(de);
+		if (de == NULL)
+			return (NULL);
 	}
 	return (buf + i);
 }
@@ -778,10 +780,10 @@ devfs_lookupx(struct vop_lookup_args *ap
 	if (flags & ISDOTDOT) {
 		if ((flags & ISLASTCN) && nameiop != LOOKUP)
 			return (EINVAL);
+		de = devfs_parent_dirent(dd);
+		if (de == NULL)
+			return (ENOENT);
 		VOP_UNLOCK(dvp, 0);
-		de = TAILQ_FIRST(&dd->de_dlist);	/* "." */
-		de = TAILQ_NEXT(de, de_list);		/* ".." */
-		de = de->de_dir;
 		error = devfs_allocv(de, dvp->v_mount, vpp);
 		*dm_unlock = 0;
 		vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY);