1 files changed, 98 insertions, 88 deletions

diff --git a/include/net/sock.h b/include/net/sock.h
index 5a0a58ac4126..d89f0582b6b6 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -70,16 +70,16 @@
 struct cgroup;
 struct cgroup_subsys;
 #ifdef CONFIG_NET
-int mem_cgroup_sockets_init(struct cgroup *cgrp, struct cgroup_subsys *ss);
-void mem_cgroup_sockets_destroy(struct cgroup *cgrp);
+int mem_cgroup_sockets_init(struct mem_cgroup *memcg, struct cgroup_subsys *ss);
+void mem_cgroup_sockets_destroy(struct mem_cgroup *memcg);
 #else
 static inline
-int mem_cgroup_sockets_init(struct cgroup *cgrp, struct cgroup_subsys *ss)
+int mem_cgroup_sockets_init(struct mem_cgroup *memcg, struct cgroup_subsys *ss)
 {
         return 0;
 }
 static inline
-void mem_cgroup_sockets_destroy(struct cgroup *cgrp)
+void mem_cgroup_sockets_destroy(struct mem_cgroup *memcg)
 {
 }
 #endif
@@ -97,7 +97,7 @@ void mem_cgroup_sockets_destroy(struct cgroup *cgrp)
 #else
 /* Validate arguments and do nothing */
 static inline __printf(2, 3)
-void SOCK_DEBUG(struct sock *sk, const char *msg, ...)
+void SOCK_DEBUG(const struct sock *sk, const char *msg, ...)
 {
 }
 #endif
@@ -372,11 +372,22 @@ struct sock {
         void                    (*sk_data_ready)(struct sock *sk, int bytes);
         void                    (*sk_write_space)(struct sock *sk);
         void                    (*sk_error_report)(struct sock *sk);
-        int                     (*sk_backlog_rcv)(struct sock *sk,
-                                                  struct sk_buff *skb);  
+        int                     (*sk_backlog_rcv)(struct sock *sk,
+                                                  struct sk_buff *skb);
         void                    (*sk_destruct)(struct sock *sk);
 };
 
+/*
+ * SK_CAN_REUSE and SK_NO_REUSE on a socket mean that the socket is OK
+ * or not whether his port will be reused by someone else. SK_FORCE_REUSE
+ * on a socket means that the socket will reuse everybody else's port
+ * without looking at the other's sk_reuse value.
+ */
+
+#define SK_NO_REUSE     0
+#define SK_CAN_REUSE    1
+#define SK_FORCE_REUSE  2
+
 static inline int sk_peek_offset(struct sock *sk, int flags)
 {
         if ((flags & MSG_PEEK) && (sk->sk_peek_off >= 0))
@@ -443,40 +454,40 @@ static inline struct sock *sk_nulls_next(const struct sock *sk)
                 NULL;
 }
 
-static inline int sk_unhashed(const struct sock *sk)
+static inline bool sk_unhashed(const struct sock *sk)
 {
         return hlist_unhashed(&sk->sk_node);
 }
 
-static inline int sk_hashed(const struct sock *sk)
+static inline bool sk_hashed(const struct sock *sk)
 {
         return !sk_unhashed(sk);
 }
 
-static __inline__ void sk_node_init(struct hlist_node *node)
+static inline void sk_node_init(struct hlist_node *node)
 {
         node->pprev = NULL;
 }
 
-static __inline__ void sk_nulls_node_init(struct hlist_nulls_node *node)
+static inline void sk_nulls_node_init(struct hlist_nulls_node *node)
 {
         node->pprev = NULL;
 }
 
-static __inline__ void __sk_del_node(struct sock *sk)
+static inline void __sk_del_node(struct sock *sk)
 {
         __hlist_del(&sk->sk_node);
 }
 
 /* NB: equivalent to hlist_del_init_rcu */
-static __inline__ int __sk_del_node_init(struct sock *sk)
+static inline bool __sk_del_node_init(struct sock *sk)
 {
         if (sk_hashed(sk)) {
                 __sk_del_node(sk);
                 sk_node_init(&sk->sk_node);
-                return 1;
+                return true;
         }
-        return 0;
+        return false;
 }
 
 /* Grab socket reference count. This operation is valid only
@@ -498,9 +509,9 @@ static inline void __sock_put(struct sock *sk)
         atomic_dec(&sk->sk_refcnt);
 }
 
-static __inline__ int sk_del_node_init(struct sock *sk)
+static inline bool sk_del_node_init(struct sock *sk)
 {
-        int rc = __sk_del_node_init(sk);
+        bool rc = __sk_del_node_init(sk);
 
         if (rc) {
                 /* paranoid for a while -acme */
@@ -511,18 +522,18 @@ static __inline__ int sk_del_node_init(struct sock *sk)
 }
 #define sk_del_node_init_rcu(sk)        sk_del_node_init(sk)
 
-static __inline__ int __sk_nulls_del_node_init_rcu(struct sock *sk)
+static inline bool __sk_nulls_del_node_init_rcu(struct sock *sk)
 {
         if (sk_hashed(sk)) {
                 hlist_nulls_del_init_rcu(&sk->sk_nulls_node);
-                return 1;
+                return true;
         }
-        return 0;
+        return false;
 }
 
-static __inline__ int sk_nulls_del_node_init_rcu(struct sock *sk)
+static inline bool sk_nulls_del_node_init_rcu(struct sock *sk)
 {
-        int rc = __sk_nulls_del_node_init_rcu(sk);
+        bool rc = __sk_nulls_del_node_init_rcu(sk);
 
         if (rc) {
                 /* paranoid for a while -acme */
@@ -532,40 +543,40 @@ static __inline__ int sk_nulls_del_node_init_rcu(struct sock *sk)
         return rc;
 }
 
-static __inline__ void __sk_add_node(struct sock *sk, struct hlist_head *list)
+static inline void __sk_add_node(struct sock *sk, struct hlist_head *list)
 {
         hlist_add_head(&sk->sk_node, list);
 }
 
-static __inline__ void sk_add_node(struct sock *sk, struct hlist_head *list)
+static inline void sk_add_node(struct sock *sk, struct hlist_head *list)
 {
         sock_hold(sk);
         __sk_add_node(sk, list);
 }
 
-static __inline__ void sk_add_node_rcu(struct sock *sk, struct hlist_head *list)
+static inline void sk_add_node_rcu(struct sock *sk, struct hlist_head *list)
 {
         sock_hold(sk);
         hlist_add_head_rcu(&sk->sk_node, list);
 }
 
-static __inline__ void __sk_nulls_add_node_rcu(struct sock *sk, struct hlist_nulls_head *list)
+static inline void __sk_nulls_add_node_rcu(struct sock *sk, struct hlist_nulls_head *list)
 {
         hlist_nulls_add_head_rcu(&sk->sk_nulls_node, list);
 }
 
-static __inline__ void sk_nulls_add_node_rcu(struct sock *sk, struct hlist_nulls_head *list)
+static inline void sk_nulls_add_node_rcu(struct sock *sk, struct hlist_nulls_head *list)
 {
         sock_hold(sk);
         __sk_nulls_add_node_rcu(sk, list);
 }
 
-static __inline__ void __sk_del_bind_node(struct sock *sk)
+static inline void __sk_del_bind_node(struct sock *sk)
 {
         __hlist_del(&sk->sk_bind_node);
 }
 
-static __inline__ void sk_add_bind_node(struct sock *sk,
+static inline void sk_add_bind_node(struct sock *sk,
                                         struct hlist_head *list)
 {
         hlist_add_head(&sk->sk_bind_node, list);
@@ -639,7 +650,7 @@ static inline void sock_reset_flag(struct sock *sk, enum sock_flags flag)
         __clear_bit(flag, &sk->sk_flags);
 }
 
-static inline int sock_flag(struct sock *sk, enum sock_flags flag)
+static inline bool sock_flag(const struct sock *sk, enum sock_flags flag)
 {
         return test_bit(flag, &sk->sk_flags);
 }
@@ -654,7 +665,7 @@ static inline void sk_acceptq_added(struct sock *sk)
         sk->sk_ack_backlog++;
 }
 
-static inline int sk_acceptq_is_full(struct sock *sk)
+static inline bool sk_acceptq_is_full(const struct sock *sk)
 {
         return sk->sk_ack_backlog > sk->sk_max_ack_backlog;
 }
@@ -662,19 +673,19 @@ static inline int sk_acceptq_is_full(struct sock *sk)
 /*
  * Compute minimal free write space needed to queue new packets.
  */
-static inline int sk_stream_min_wspace(struct sock *sk)
+static inline int sk_stream_min_wspace(const struct sock *sk)
 {
         return sk->sk_wmem_queued >> 1;
 }
 
-static inline int sk_stream_wspace(struct sock *sk)
+static inline int sk_stream_wspace(const struct sock *sk)
 {
         return sk->sk_sndbuf - sk->sk_wmem_queued;
 }
 
 extern void sk_stream_write_space(struct sock *sk);
 
-static inline int sk_stream_memory_free(struct sock *sk)
+static inline bool sk_stream_memory_free(const struct sock *sk)
 {
         return sk->sk_wmem_queued < sk->sk_sndbuf;
 }
@@ -699,17 +710,19 @@ static inline void __sk_add_backlog(struct sock *sk, struct sk_buff *skb)
  * Do not take into account this skb truesize,
  * to allow even a single big packet to come.
  */
-static inline bool sk_rcvqueues_full(const struct sock *sk, const struct sk_buff *skb)
+static inline bool sk_rcvqueues_full(const struct sock *sk, const struct sk_buff *skb,
+                                     unsigned int limit)
 {
         unsigned int qsize = sk->sk_backlog.len + atomic_read(&sk->sk_rmem_alloc);
 
-        return qsize > sk->sk_rcvbuf;
+        return qsize > limit;
 }
 
 /* The per-socket spinlock must be held here. */
-static inline __must_check int sk_add_backlog(struct sock *sk, struct sk_buff *skb)
+static inline __must_check int sk_add_backlog(struct sock *sk, struct sk_buff *skb,
+                                              unsigned int limit)
 {
-        if (sk_rcvqueues_full(sk, skb))
+        if (sk_rcvqueues_full(sk, skb, limit))
                 return -ENOBUFS;
 
         __sk_add_backlog(sk, skb);
@@ -796,26 +809,26 @@ struct module;
  * transport -> network interface is defined by struct inet_proto
  */
 struct proto {
-        void                    (*close)(struct sock *sk, 
+        void                    (*close)(struct sock *sk,
                                         long timeout);
         int                     (*connect)(struct sock *sk,
-                                        struct sockaddr *uaddr, 
+                                        struct sockaddr *uaddr,
                                         int addr_len);
         int                     (*disconnect)(struct sock *sk, int flags);
 
-        struct sock *           (*accept) (struct sock *sk, int flags, int *err);
+        struct sock *           (*accept)(struct sock *sk, int flags, int *err);
 
         int                     (*ioctl)(struct sock *sk, int cmd,
                                          unsigned long arg);
         int                     (*init)(struct sock *sk);
         void                    (*destroy)(struct sock *sk);
         void                    (*shutdown)(struct sock *sk, int how);
-        int                     (*setsockopt)(struct sock *sk, int level, 
+        int                     (*setsockopt)(struct sock *sk, int level,
                                         int optname, char __user *optval,
                                         unsigned int optlen);
-        int                     (*getsockopt)(struct sock *sk, int level, 
-                                        int optname, char __user *optval, 
-                                        int __user *option);     
+        int                     (*getsockopt)(struct sock *sk, int level,
+                                        int optname, char __user *optval,
+                                        int __user *option);
 #ifdef CONFIG_COMPAT
         int                     (*compat_setsockopt)(struct sock *sk,
                                         int level,
@@ -832,14 +845,14 @@ struct proto {
                                            struct msghdr *msg, size_t len);
         int                     (*recvmsg)(struct kiocb *iocb, struct sock *sk,
                                            struct msghdr *msg,
-                                        size_t len, int noblock, int flags, 
-                                        int *addr_len);
+                                           size_t len, int noblock, int flags,
+                                           int *addr_len);
         int                     (*sendpage)(struct sock *sk, struct page *page,
                                         int offset, size_t size, int flags);
-        int                     (*bind)(struct sock *sk, 
+        int                     (*bind)(struct sock *sk,
                                         struct sockaddr *uaddr, int addr_len);
 
-        int                     (*backlog_rcv) (struct sock *sk, 
+        int                     (*backlog_rcv) (struct sock *sk,
                                                 struct sk_buff *skb);
 
         /* Keeping track of sk's, looking them up, and port selection methods. */
@@ -901,9 +914,9 @@ struct proto {
          * This function has to setup any files the protocol want to
          * appear in the kmem cgroup filesystem.
          */
-        int                     (*init_cgroup)(struct cgroup *cgrp,
+        int                     (*init_cgroup)(struct mem_cgroup *memcg,
                                                struct cgroup_subsys *ss);
-        void                    (*destroy_cgroup)(struct cgroup *cgrp);
+        void                    (*destroy_cgroup)(struct mem_cgroup *memcg);
         struct cg_proto         *(*proto_cgroup)(struct mem_cgroup *memcg);
 #endif
 };
@@ -1160,7 +1173,7 @@ proto_memory_pressure(struct proto *prot)
 extern void sock_prot_inuse_add(struct net *net, struct proto *prot, int inc);
 extern int sock_prot_inuse_get(struct net *net, struct proto *proto);
 #else
-static void inline sock_prot_inuse_add(struct net *net, struct proto *prot,
+static inline void sock_prot_inuse_add(struct net *net, struct proto *prot,
                 int inc)
 {
 }
@@ -1247,24 +1260,24 @@ static inline int sk_mem_pages(int amt)
         return (amt + SK_MEM_QUANTUM - 1) >> SK_MEM_QUANTUM_SHIFT;
 }
 
-static inline int sk_has_account(struct sock *sk)
+static inline bool sk_has_account(struct sock *sk)
 {
         /* return true if protocol supports memory accounting */
         return !!sk->sk_prot->memory_allocated;
 }
 
-static inline int sk_wmem_schedule(struct sock *sk, int size)
+static inline bool sk_wmem_schedule(struct sock *sk, int size)
 {
         if (!sk_has_account(sk))
-                return 1;
+                return true;
         return size <= sk->sk_forward_alloc ||
                 __sk_mem_schedule(sk, size, SK_MEM_SEND);
 }
 
-static inline int sk_rmem_schedule(struct sock *sk, int size)
+static inline bool sk_rmem_schedule(struct sock *sk, int size)
 {
         if (!sk_has_account(sk))
-                return 1;
+                return true;
         return size <= sk->sk_forward_alloc ||
                 __sk_mem_schedule(sk, size, SK_MEM_RECV);
 }
@@ -1329,7 +1342,7 @@ static inline void sk_wmem_free_skb(struct sock *sk, struct sk_buff *skb)
  * Mark both the sk_lock and the sk_lock.slock as a
  * per-address-family lock class.
  */
-#define sock_lock_init_class_and_name(sk, sname, skey, name, key)       \
+#define sock_lock_init_class_and_name(sk, sname, skey, name, key)       \
 do {                                                                    \
         sk->sk_lock.owned = 0;                                          \
         init_waitqueue_head(&sk->sk_lock.wq);                           \
@@ -1337,7 +1350,7 @@ do {									\
         debug_check_no_locks_freed((void *)&(sk)->sk_lock,              \
                         sizeof((sk)->sk_lock));                         \
         lockdep_set_class_and_name(&(sk)->sk_lock.slock,                \
-                        (skey), (sname));                               \
+                                (skey), (sname));                               \
         lockdep_init_map(&(sk)->sk_lock.dep_map, (name), (key), 0);     \
 } while (0)
 
@@ -1397,13 +1410,13 @@ extern int			sock_setsockopt(struct socket *sock, int level,
                                                 unsigned int optlen);
 
 extern int                      sock_getsockopt(struct socket *sock, int level,
-                                                int op, char __user *optval, 
+                                                int op, char __user *optval,
                                                 int __user *optlen);
-extern struct sk_buff           *sock_alloc_send_skb(struct sock *sk,
+extern struct sk_buff           *sock_alloc_send_skb(struct sock *sk,
                                                      unsigned long size,
                                                      int noblock,
                                                      int *errcode);
-extern struct sk_buff           *sock_alloc_send_pskb(struct sock *sk,
+extern struct sk_buff           *sock_alloc_send_pskb(struct sock *sk,
                                                       unsigned long header_len,
                                                       unsigned long data_len,
                                                       int noblock,
@@ -1425,7 +1438,7 @@ static inline void sock_update_classid(struct sock *sk)
  * Functions to fill in entries in struct proto_ops when a protocol
  * does not implement a particular function.
  */
-extern int                      sock_no_bind(struct socket *, 
+extern int                      sock_no_bind(struct socket *,
                                              struct sockaddr *, int);
 extern int                      sock_no_connect(struct socket *,
                                                 struct sockaddr *, int, int);
@@ -1454,7 +1467,7 @@ extern int			sock_no_mmap(struct file *file,
                                              struct vm_area_struct *vma);
 extern ssize_t                  sock_no_sendpage(struct socket *sock,
                                                 struct page *page,
-                                                int offset, size_t size, 
+                                                int offset, size_t size,
                                                 int flags);
 
 /*
@@ -1477,7 +1490,7 @@ extern void sk_common_release(struct sock *sk);
 /*
  *      Default socket callbacks and setup code
  */
- 
+
 /* Initialise core socket variables */
 extern void sock_init_data(struct socket *sock, struct sock *sk);
 
@@ -1677,7 +1690,7 @@ extern struct dst_entry *__sk_dst_check(struct sock *sk, u32 cookie);
 
 extern struct dst_entry *sk_dst_check(struct sock *sk, u32 cookie);
 
-static inline int sk_can_gso(const struct sock *sk)
+static inline bool sk_can_gso(const struct sock *sk)
 {
         return net_gso_ok(sk->sk_route_caps, sk->sk_gso_type);
 }
@@ -1794,7 +1807,7 @@ static inline int sk_rmem_alloc_get(const struct sock *sk)
  *
  * Returns true if socket has write or read allocations
  */
-static inline int sk_has_allocations(const struct sock *sk)
+static inline bool sk_has_allocations(const struct sock *sk)
 {
         return sk_wmem_alloc_get(sk) || sk_rmem_alloc_get(sk);
 }
@@ -1833,9 +1846,7 @@ static inline int sk_has_allocations(const struct sock *sk)
  */
 static inline bool wq_has_sleeper(struct socket_wq *wq)
 {
-
-        /*
-         * We need to be sure we are in sync with the
+        /* We need to be sure we are in sync with the
          * add_wait_queue modifications to the wait queue.
          *
          * This memory barrier is paired in the sock_poll_wait.
@@ -1857,22 +1868,21 @@ static inline void sock_poll_wait(struct file *filp,
 {
         if (!poll_does_not_wait(p) && wait_address) {
                 poll_wait(filp, wait_address, p);
-                /*
-                 * We need to be sure we are in sync with the
+                /* We need to be sure we are in sync with the
                  * socket flags modification.
                  *
                  * This memory barrier is paired in the wq_has_sleeper.
-                */
+                 */
                 smp_mb();
         }
 }
 
 /*
- *      Queue a received datagram if it will fit. Stream and sequenced
+ *      Queue a received datagram if it will fit. Stream and sequenced
  *      protocols can't normally use this as they need to fit buffers in
  *      and play with them.
  *
- *      Inlined as it's very short and called for pretty much every
+ *      Inlined as it's very short and called for pretty much every
  *      packet ever received.
  */
 
@@ -1898,10 +1908,10 @@ static inline void skb_set_owner_r(struct sk_buff *skb, struct sock *sk)
         sk_mem_charge(sk, skb->truesize);
 }
 
-extern void sk_reset_timer(struct sock *sk, struct timer_list* timer,
+extern void sk_reset_timer(struct sock *sk, struct timer_list *timer,
                            unsigned long expires);
 
-extern void sk_stop_timer(struct sock *sk, struct timer_list* timer);
+extern void sk_stop_timer(struct sock *sk, struct timer_list *timer);
 
 extern int sock_queue_rcv_skb(struct sock *sk, struct sk_buff *skb);
 
@@ -1910,7 +1920,7 @@ extern int sock_queue_err_skb(struct sock *sk, struct sk_buff *skb);
 /*
  *      Recover an error report and clear atomically
  */
- 
+
 static inline int sock_error(struct sock *sk)
 {
         int err;
@@ -1926,7 +1936,7 @@ static inline unsigned long sock_wspace(struct sock *sk)
 
         if (!(sk->sk_shutdown & SEND_SHUTDOWN)) {
                 amt = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc);
-                if (amt < 0) 
+                if (amt < 0)
                         amt = 0;
         }
         return amt;
@@ -1970,7 +1980,7 @@ static inline struct page *sk_stream_alloc_page(struct sock *sk)
 /*
  *      Default write policy as shown to user space via poll/select/SIGIO
  */
-static inline int sock_writeable(const struct sock *sk) 
+static inline bool sock_writeable(const struct sock *sk)
 {
         return atomic_read(&sk->sk_wmem_alloc) < (sk->sk_sndbuf >> 1);
 }
@@ -1980,12 +1990,12 @@ static inline gfp_t gfp_any(void)
         return in_softirq() ? GFP_ATOMIC : GFP_KERNEL;
 }
 
-static inline long sock_rcvtimeo(const struct sock *sk, int noblock)
+static inline long sock_rcvtimeo(const struct sock *sk, bool noblock)
 {
         return noblock ? 0 : sk->sk_rcvtimeo;
 }
 
-static inline long sock_sndtimeo(const struct sock *sk, int noblock)
+static inline long sock_sndtimeo(const struct sock *sk, bool noblock)
 {
         return noblock ? 0 : sk->sk_sndtimeo;
 }
@@ -2008,7 +2018,7 @@ extern void __sock_recv_timestamp(struct msghdr *msg, struct sock *sk,
 extern void __sock_recv_wifi_status(struct msghdr *msg, struct sock *sk,
         struct sk_buff *skb);
 
-static __inline__ void
+static inline void
 sock_recv_timestamp(struct msghdr *msg, struct sock *sk, struct sk_buff *skb)
 {
         ktime_t kt = skb->tstamp;
@@ -2049,7 +2059,7 @@ static inline void sock_recv_ts_and_drops(struct msghdr *msg, struct sock *sk,
                            (1UL << SOCK_RCVTSTAMP)                      | \
                            (1UL << SOCK_TIMESTAMPING_RX_SOFTWARE)       | \
                            (1UL << SOCK_TIMESTAMPING_SOFTWARE)          | \
-                           (1UL << SOCK_TIMESTAMPING_RAW_HARDWARE)      | \
+                           (1UL << SOCK_TIMESTAMPING_RAW_HARDWARE)      | \
                            (1UL << SOCK_TIMESTAMPING_SYS_HARDWARE))
 
         if (sk->sk_flags & FLAGS_TS_OR_DROPS)
@@ -2078,7 +2088,7 @@ extern int sock_tx_timestamp(struct sock *sk, __u8 *tx_flags);
  * locked so that the sk_buff queue operation is ok.
 */
 #ifdef CONFIG_NET_DMA
-static inline void sk_eat_skb(struct sock *sk, struct sk_buff *skb, int copied_early)
+static inline void sk_eat_skb(struct sock *sk, struct sk_buff *skb, bool copied_early)
 {
         __skb_unlink(skb, &sk->sk_receive_queue);
         if (!copied_early)
@@ -2087,7 +2097,7 @@ static inline void sk_eat_skb(struct sock *sk, struct sk_buff *skb, int copied_e
                 __skb_queue_tail(&sk->sk_async_wait_queue, skb);
 }
 #else
-static inline void sk_eat_skb(struct sock *sk, struct sk_buff *skb, int copied_early)
+static inline void sk_eat_skb(struct sock *sk, struct sk_buff *skb, bool copied_early)
 {
         __skb_unlink(skb, &sk->sk_receive_queue);
         __kfree_skb(skb);
@@ -2134,8 +2144,8 @@ extern void sock_enable_timestamp(struct sock *sk, int flag);
 extern int sock_get_timestamp(struct sock *, struct timeval __user *);
 extern int sock_get_timestampns(struct sock *, struct timespec __user *);
 
-/* 
- *      Enable debug/info messages 
+/*
+ *      Enable debug/info messages
  */
 extern int net_msg_warn;
 #define NETDEBUG(fmt, args...) \