X-Git-Url: http://www.pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=fs%2Fautofs4%2Fexpire.c;h=500425e24fba9178c13db5550a7f9271256249d4;hb=3a9720ce73c9247e5262922d65e90444ea75eb50;hp=31540a6404d91ef6c2373a7bb0091af3ef1a8c99;hpb=4dcd00b18118d174c4b8d838c11f437f0af3c20c;p=linux-2.6-omap-h63xx.git

diff --git a/fs/autofs4/expire.c b/fs/autofs4/expire.c
index 31540a6404d..500425e24fb 100644
--- a/fs/autofs4/expire.c
+++ b/fs/autofs4/expire.c
@@ -99,6 +99,10 @@ static int autofs4_check_tree(struct vfsmount *mnt,
 	if (!autofs4_can_expire(top, timeout, do_now))
 		return 0;
 
+	/* Is someone visiting anywhere in the tree ? */
+	if (may_umount_tree(mnt))
+		return 0;
+
 	spin_lock(&dcache_lock);
 repeat:
 	next = this_parent->d_subdirs.next;
@@ -270,10 +274,18 @@ static struct dentry *autofs4_expire(struct super_block *sb,
 
 		/* Case 2: tree mount, expire iff entire tree is not busy */
 		if (!exp_leaves) {
+			/* Lock the tree as we must expire as a whole */
+			spin_lock(&sbi->fs_lock);
 			if (autofs4_check_tree(mnt, dentry, timeout, do_now)) {
-			expired = dentry;
-			break;
+				struct autofs_info *inf = autofs4_dentry_ino(dentry);
+
+				/* Set this flag early to catch sys_chdir and the like */
+				inf->flags |= AUTOFS_INF_EXPIRING;
+				spin_unlock(&sbi->fs_lock);
+				expired = dentry;
+				break;
 			}
+			spin_unlock(&sbi->fs_lock);
 		/* Case 3: direct mount, expire individual leaves */
 		} else {
 			expired = autofs4_check_leaves(mnt, dentry, timeout, do_now);