[PATCH 04/17] AFS: Add key request for pioctl

[David Howells <dhowells@redhat.com>]

From: Wang Lei <wang840925@gmail.com>

afs_pioctl() should get the security key applicable to the nominated file and
pass it on to the command handlers.

Signed-off-by: Wang Lei <wang840925@gmail.com>
Signed-off-by: David Howells <dhowells@redhat.com>
---

 fs/afs/pioctl.c |   21 ++++++++++++++++++++-
 1 files changed, 20 insertions(+), 1 deletions(-)


diff --git a/fs/afs/pioctl.c b/fs/afs/pioctl.c
index 5a76017..63a6211 100644
--- a/fs/afs/pioctl.c
+++ b/fs/afs/pioctl.c
@@ -17,9 +17,28 @@
  */
 long afs_pioctl(struct dentry *dentry, int cmd, struct vice_ioctl *arg)
 {
+	struct afs_vnode *vnode = AFS_FS_I(dentry->d_inode);
+	struct key *key;
+	long ret;
+
+	_enter(",%x(%d),{%d,%d}",
+	       cmd, _IOC_NR(cmd), arg->in_size, arg->out_size);
+
+	key = afs_request_key(vnode->volume->cell);
+	if (IS_ERR(key)) {
+		ret = PTR_ERR(key);
+		_leave(" = %ld [no key]", ret);
+		return ret;
+	}
+
 	switch (cmd) {
 	default:
 		printk(KERN_DEBUG "AFS: Unsupported pioctl command %x\n", cmd);
-		return -EOPNOTSUPP;
+		ret = -EOPNOTSUPP;
+		break;
 	}
+
+	key_put(key);
+	_leave(" = %ld", ret);
+	return ret;
 }