Merge master.kernel.org:/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6

[firefly-linux-kernel-4.4.55.git] / net / unix / af_unix.c

diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c
index 6f2909279268aadd136f28a3c210e6533f2c92c7..2f208c7f4d435aaef980a37795052609940f608d 100644 (file)
--- a/net/unix/af_unix.c
+++ b/net/unix/af_unix.c
@@ -117,7 +117,7 @@
 #include <net/checksum.h>
 #include <linux/security.h>
 
-int sysctl_unix_max_dgram_qlen = 10;
+int sysctl_unix_max_dgram_qlen __read_mostly = 10;
 
 struct hlist_head unix_socket_table[UNIX_HASH_SIZE + 1];
 DEFINE_SPINLOCK(unix_table_lock);
@@ -128,23 +128,17 @@ static atomic_t unix_nr_socks = ATOMIC_INIT(0);
 #define UNIX_ABSTRACT(sk)      (unix_sk(sk)->addr->hash != UNIX_HASH_SIZE)
 
 #ifdef CONFIG_SECURITY_NETWORK
-static void unix_get_peersec_dgram(struct sk_buff *skb)
+static void unix_get_secdata(struct scm_cookie *scm, struct sk_buff *skb)
 {
-       int err;
-
-       err = security_socket_getpeersec_dgram(skb, UNIXSECDATA(skb),
-                                              UNIXSECLEN(skb));
-       if (err)
-               *(UNIXSECDATA(skb)) = NULL;
+       memcpy(UNIXSID(skb), &scm->secid, sizeof(u32));
 }
 
 static inline void unix_set_secdata(struct scm_cookie *scm, struct sk_buff *skb)
 {
-       scm->secdata = *UNIXSECDATA(skb);
-       scm->seclen = *UNIXSECLEN(skb);
+       scm->secid = *UNIXSID(skb);
 }
 #else
-static inline void unix_get_peersec_dgram(struct sk_buff *skb)
+static inline void unix_get_secdata(struct scm_cookie *scm, struct sk_buff *skb)
 { }
 
 static inline void unix_set_secdata(struct scm_cookie *scm, struct sk_buff *skb)
@@ -157,8 +151,9 @@ static inline void unix_set_secdata(struct scm_cookie *scm, struct sk_buff *skb)
  *    each socket state is protected by separate rwlock.
  */
 
-static inline unsigned unix_hash_fold(unsigned hash)
+static inline unsigned unix_hash_fold(__wsum n)
 {
+       unsigned hash = (__force unsigned)n;
        hash ^= hash>>16;
        hash ^= hash>>8;
        return hash&(UNIX_HASH_SIZE-1);
@@ -1322,8 +1317,7 @@ static int unix_dgram_sendmsg(struct kiocb *kiocb, struct socket *sock,
        memcpy(UNIXCREDS(skb), &siocb->scm->creds, sizeof(struct ucred));
        if (siocb->scm->fp)
                unix_attach_fds(siocb->scm, skb);
-
-       unix_get_peersec_dgram(skb);
+       unix_get_secdata(siocb->scm, skb);
 
        skb->h.raw = skb->data;
        err = memcpy_fromiovec(skb_put(skb,len), msg->msg_iov, len);
@@ -2067,10 +2061,7 @@ static int __init af_unix_init(void)
        int rc = -1;
        struct sk_buff *dummy_skb;
 
-       if (sizeof(struct unix_skb_parms) > sizeof(dummy_skb->cb)) {
-               printk(KERN_CRIT "%s: panic\n", __FUNCTION__);
-               goto out;
-       }
+       BUILD_BUG_ON(sizeof(struct unix_skb_parms) > sizeof(dummy_skb->cb));
 
        rc = proto_register(&unix_proto, 1);
         if (rc != 0) {