This functionality is also need for operation of autofs v5 direct mounts.
Signed-off-by: Ian Kent <[email protected]>
---
--- linux-2.6.16-rc5-mm3/fs/autofs4/root.c.follow_link-ommission 2006-03-08 13:21:37.000000000 +0800
+++ linux-2.6.16-rc5-mm3/fs/autofs4/root.c 2006-03-08 13:27:47.000000000 +0800
@@ -57,6 +57,9 @@ struct inode_operations autofs4_indirect
struct inode_operations autofs4_direct_root_inode_operations = {
.lookup = autofs4_lookup,
+ .unlink = autofs4_dir_unlink,
+ .mkdir = autofs4_dir_mkdir,
+ .rmdir = autofs4_dir_rmdir,
.follow_link = autofs4_follow_link,
};
@@ -337,10 +340,34 @@ static void *autofs4_follow_link(struct
if (oz_mode || !lookup_type)
goto done;
+ /*
+ * If the dentry contains directories then it is an
+ * autofs multi-mount with no root offset. So don't
+ * try to mount it again.
+ */
+ spin_lock(&dcache_lock);
+ if (!list_empty(&dentry->d_subdirs)) {
+ spin_unlock(&dcache_lock);
+ goto done;
+ }
+ spin_unlock(&dcache_lock);
+
status = try_to_fill_dentry(dentry, 0);
if (status)
goto out_error;
+ /*
+ * The mount succeeded but if there is no root mount
+ * and directories have been created then it must
+ * be an autofs multi-mount with no root offset.
+ */
+ spin_lock(&dcache_lock);
+ if (!d_mountpoint(dentry) && !list_empty(&dentry->d_subdirs)) {
+ spin_unlock(&dcache_lock);
+ goto done;
+ }
+ spin_unlock(&dcache_lock);
+
if (!autofs4_follow_mount(&nd->mnt, &nd->dentry)) {
status = -ENOENT;
goto out_error;
--- linux-2.6.16-rc5-mm3/fs/autofs4/expire.c.follow_link-ommission 2006-03-08 14:18:25.000000000 +0800
+++ linux-2.6.16-rc5-mm3/fs/autofs4/expire.c 2006-03-08 13:28:21.000000000 +0800
@@ -113,10 +113,6 @@ static int autofs4_direct_busy(struct vf
DPRINTK("top %p %.*s",
top, (int) top->d_name.len, top->d_name.name);
- /* Not a mountpoint - give up */
- if (!d_mountpoint(top))
- return 1;
-
/* If it's busy update the expiry counters */
if (!may_umount_tree(mnt)) {
struct autofs_info *ino = autofs4_dentry_ino(top);
-
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