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authorIan Kent <raven@themaw.net>2006-03-27 01:14:58 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-03-27 08:44:41 -0800
commit871f94344cea36b2ce91231f442f9f9298529712 (patch)
tree951865804407af1afcd7e84f1c152236302bb7f4 /fs/autofs4
parent3370c74b2e147169d5bba6665e03d3281f5795ed (diff)
downloadblackbird-op-linux-871f94344cea36b2ce91231f442f9f9298529712.tar.gz
blackbird-op-linux-871f94344cea36b2ce91231f442f9f9298529712.zip
[PATCH] autofs4: follow_link missing functionality
This functionality is also need for operation of autofs v5 direct mounts. Signed-off-by: Ian Kent <raven@themaw.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'fs/autofs4')
-rw-r--r--fs/autofs4/expire.c4
-rw-r--r--fs/autofs4/root.c50
2 files changed, 44 insertions, 10 deletions
diff --git a/fs/autofs4/expire.c b/fs/autofs4/expire.c
index 08e33218a64a..b8ce02607d66 100644
--- a/fs/autofs4/expire.c
+++ b/fs/autofs4/expire.c
@@ -113,10 +113,6 @@ static int autofs4_direct_busy(struct vfsmount *mnt,
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);
diff --git a/fs/autofs4/root.c b/fs/autofs4/root.c
index 3f0048582248..c8fe43a475e2 100644
--- a/fs/autofs4/root.c
+++ b/fs/autofs4/root.c
@@ -57,6 +57,9 @@ struct inode_operations autofs4_indirect_root_inode_operations = {
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,
};
@@ -337,15 +340,50 @@ static void *autofs4_follow_link(struct dentry *dentry, struct nameidata *nd)
if (oz_mode || !lookup_type)
goto done;
- status = try_to_fill_dentry(dentry, 0);
- if (status)
- goto out_error;
+ /*
+ * If a request is pending wait for it.
+ * If it's a mount then it won't be expired till at least
+ * a liitle later and if it's an expire then we might need
+ * to mount it again.
+ */
+ if (autofs4_ispending(dentry)) {
+ DPRINTK("waiting for active request %p name=%.*s",
+ dentry, dentry->d_name.len, dentry->d_name.name);
- if (!autofs4_follow_mount(&nd->mnt, &nd->dentry)) {
- status = -ENOENT;
- goto out_error;
+ status = autofs4_wait(sbi, dentry, NFY_NONE);
+
+ DPRINTK("request done status=%d", status);
}
+ /*
+ * If the dentry contains directories then it is an
+ * autofs multi-mount with no root mount offset. So
+ * don't try to mount it again.
+ */
+ spin_lock(&dcache_lock);
+ if (!d_mountpoint(dentry) && list_empty(&dentry->d_subdirs)) {
+ 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
+ * it must be an autofs multi-mount with no root offset
+ * so we don't need to follow the mount.
+ */
+ if (d_mountpoint(dentry)) {
+ if (!autofs4_follow_mount(&nd->mnt, &nd->dentry)) {
+ status = -ENOENT;
+ goto out_error;
+ }
+ }
+
+ goto done;
+ }
+ spin_unlock(&dcache_lock);
+
done:
return NULL;
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