From 40ffe67d2e89c7a475421d007becc11a2f88ea3d Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Wed, 14 Mar 2012 21:54:32 -0400
Subject: switch unix_sock to struct path

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
 include/net/af_unix.h |  3 +--
 net/unix/af_unix.c    | 35 +++++++++++++++--------------------
 net/unix/diag.c       |  2 +-
 security/lsm_audit.c  |  8 ++------
 4 files changed, 19 insertions(+), 29 deletions(-)

diff --git a/include/net/af_unix.h b/include/net/af_unix.h
index 5a4e29b168c9..ca68e2cef230 100644
--- a/include/net/af_unix.h
+++ b/include/net/af_unix.h
@@ -49,8 +49,7 @@ struct unix_sock {
 	/* WARNING: sk has to be the first member */
 	struct sock		sk;
 	struct unix_address     *addr;
-	struct dentry		*dentry;
-	struct vfsmount		*mnt;
+	struct path		path;
 	struct mutex		readlock;
 	struct sock		*peer;
 	struct sock		*other;
diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c
index 85d3bb7490aa..ef4b780ef63d 100644
--- a/net/unix/af_unix.c
+++ b/net/unix/af_unix.c
@@ -293,7 +293,7 @@ static struct sock *unix_find_socket_byinode(struct inode *i)
 	spin_lock(&unix_table_lock);
 	sk_for_each(s, node,
 		    &unix_socket_table[i->i_ino & (UNIX_HASH_SIZE - 1)]) {
-		struct dentry *dentry = unix_sk(s)->dentry;
+		struct dentry *dentry = unix_sk(s)->path.dentry;
 
 		if (dentry && dentry->d_inode == i) {
 			sock_hold(s);
@@ -377,8 +377,7 @@ static void unix_sock_destructor(struct sock *sk)
 static int unix_release_sock(struct sock *sk, int embrion)
 {
 	struct unix_sock *u = unix_sk(sk);
-	struct dentry *dentry;
-	struct vfsmount *mnt;
+	struct path path;
 	struct sock *skpair;
 	struct sk_buff *skb;
 	int state;
@@ -389,10 +388,9 @@ static int unix_release_sock(struct sock *sk, int embrion)
 	unix_state_lock(sk);
 	sock_orphan(sk);
 	sk->sk_shutdown = SHUTDOWN_MASK;
-	dentry	     = u->dentry;
-	u->dentry    = NULL;
-	mnt	     = u->mnt;
-	u->mnt	     = NULL;
+	path	     = u->path;
+	u->path.dentry = NULL;
+	u->path.mnt = NULL;
 	state = sk->sk_state;
 	sk->sk_state = TCP_CLOSE;
 	unix_state_unlock(sk);
@@ -425,10 +423,8 @@ static int unix_release_sock(struct sock *sk, int embrion)
 		kfree_skb(skb);
 	}
 
-	if (dentry) {
-		dput(dentry);
-		mntput(mnt);
-	}
+	if (path.dentry)
+		path_put(&path);
 
 	sock_put(sk);
 
@@ -628,8 +624,8 @@ static struct sock *unix_create1(struct net *net, struct socket *sock)
 	sk->sk_max_ack_backlog	= net->unx.sysctl_max_dgram_qlen;
 	sk->sk_destruct		= unix_sock_destructor;
 	u	  = unix_sk(sk);
-	u->dentry = NULL;
-	u->mnt	  = NULL;
+	u->path.dentry = NULL;
+	u->path.mnt = NULL;
 	spin_lock_init(&u->lock);
 	atomic_long_set(&u->inflight, 0);
 	INIT_LIST_HEAD(&u->link);
@@ -789,9 +785,9 @@ static struct sock *unix_find_other(struct net *net,
 		u = unix_find_socket_byname(net, sunname, len, type, hash);
 		if (u) {
 			struct dentry *dentry;
-			dentry = unix_sk(u)->dentry;
+			dentry = unix_sk(u)->path.dentry;
 			if (dentry)
-				touch_atime(unix_sk(u)->mnt, dentry);
+				touch_atime(unix_sk(u)->path.mnt, dentry);
 		} else
 			goto fail;
 	}
@@ -897,8 +893,7 @@ out_mknod_drop_write:
 		list = &unix_socket_table[addr->hash];
 	} else {
 		list = &unix_socket_table[dentry->d_inode->i_ino & (UNIX_HASH_SIZE-1)];
-		u->dentry = path.dentry;
-		u->mnt    = path.mnt;
+		u->path = path;
 	}
 
 	err = 0;
@@ -1180,9 +1175,9 @@ restart:
 		atomic_inc(&otheru->addr->refcnt);
 		newu->addr = otheru->addr;
 	}
-	if (otheru->dentry) {
-		newu->dentry	= dget(otheru->dentry);
-		newu->mnt	= mntget(otheru->mnt);
+	if (otheru->path.dentry) {
+		path_get(&otheru->path);
+		newu->path = otheru->path;
 	}
 
 	/* Set credentials */
diff --git a/net/unix/diag.c b/net/unix/diag.c
index 6b7697fd911b..ffd86518e646 100644
--- a/net/unix/diag.c
+++ b/net/unix/diag.c
@@ -29,7 +29,7 @@ rtattr_failure:
 
 static int sk_diag_dump_vfs(struct sock *sk, struct sk_buff *nlskb)
 {
-	struct dentry *dentry = unix_sk(sk)->dentry;
+	struct dentry *dentry = unix_sk(sk)->path.dentry;
 	struct unix_diag_vfs *uv;
 
 	if (dentry) {
diff --git a/security/lsm_audit.c b/security/lsm_audit.c
index 293b8c45b1d1..8b8f0902f6e5 100644
--- a/security/lsm_audit.c
+++ b/security/lsm_audit.c
@@ -313,12 +313,8 @@ static void dump_common_audit_data(struct audit_buffer *ab,
 			}
 			case AF_UNIX:
 				u = unix_sk(sk);
-				if (u->dentry) {
-					struct path path = {
-						.dentry = u->dentry,
-						.mnt = u->mnt
-					};
-					audit_log_d_path(ab, " path=", &path);
+				if (u->path.dentry) {
+					audit_log_d_path(ab, " path=", &u->path);
 					break;
 				}
 				if (!u->addr)
-- 
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