sock: add net to prot->enter_memory_pressure callback

The tcp_enter_memory_pressure calls NET_INC_STATS, but doesn't
have where to get the net from.

I decided to add a sk argument, not the net itself, only to factor
all the required sock_net(sk) calls inside the enter_memory_pressure
callback itself.

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/include/net/sock.h b/include/net/sock.h
index 3f4897a..06c5259 100644 (file)
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -565,7 +565,7 @@ struct proto {
 #endif
 
        /* Memory pressure */
-       void                    (*enter_memory_pressure)(void);
+       void                    (*enter_memory_pressure)(struct sock *sk);
        atomic_t                *memory_allocated;      /* Current allocated memory. */
        atomic_t                *sockets_allocated;     /* Current number of sockets. */
        /*
@@ -1210,7 +1210,7 @@ static inline struct page *sk_stream_alloc_page(struct sock *sk)
 
        page = alloc_pages(sk->sk_allocation, 0);
        if (!page) {
-               sk->sk_prot->enter_memory_pressure();
+               sk->sk_prot->enter_memory_pressure(sk);
                sk_stream_moderate_sndbuf(sk);
        }
        return page;

diff --git a/include/net/tcp.h b/include/net/tcp.h
index 4d78818..c25cb52 100644 (file)
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -975,7 +975,7 @@ static inline void tcp_openreq_init(struct request_sock *req,
        ireq->rmt_port = tcp_hdr(skb)->source;
 }
 
-extern void tcp_enter_memory_pressure(void);
+extern void tcp_enter_memory_pressure(struct sock *sk);
 
 static inline int keepalive_intvl_when(const struct tcp_sock *tp)
 {

diff --git a/net/core/sock.c b/net/core/sock.c
index 2c0ba52..10a64d5 100644 (file)
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -1442,7 +1442,7 @@ int __sk_mem_schedule(struct sock *sk, int size, int kind)
        /* Under pressure. */
        if (allocated > prot->sysctl_mem[1])
                if (prot->enter_memory_pressure)
-                       prot->enter_memory_pressure();
+                       prot->enter_memory_pressure(sk);
 
        /* Over hard limit. */
        if (allocated > prot->sysctl_mem[2])

diff --git a/net/decnet/af_decnet.c b/net/decnet/af_decnet.c
index 931bdf9..61b7df5 100644 (file)
--- a/net/decnet/af_decnet.c
+++ b/net/decnet/af_decnet.c
@@ -451,7 +451,7 @@ static void dn_destruct(struct sock *sk)
 
 static int dn_memory_pressure;
 
-static void dn_enter_memory_pressure(void)
+static void dn_enter_memory_pressure(struct sock *sk)
 {
        if (!dn_memory_pressure) {
                dn_memory_pressure = 1;

diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index 525dcf5..bc8559a 100644 (file)
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -316,7 +316,7 @@ int tcp_memory_pressure __read_mostly;
 
 EXPORT_SYMBOL(tcp_memory_pressure);
 
-void tcp_enter_memory_pressure(void)
+void tcp_enter_memory_pressure(struct sock *sk)
 {
        if (!tcp_memory_pressure) {
                NET_INC_STATS(LINUX_MIB_TCPMEMORYPRESSURES);
@@ -649,7 +649,7 @@ struct sk_buff *sk_stream_alloc_skb(struct sock *sk, int size, gfp_t gfp)
                }
                __kfree_skb(skb);
        } else {
-               sk->sk_prot->enter_memory_pressure();
+               sk->sk_prot->enter_memory_pressure(sk);
                sk_stream_moderate_sndbuf(sk);
        }
        return NULL;

diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index df5572c..6aba01b 100644 (file)
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -116,7 +116,7 @@ static int sctp_memory_pressure;
 static atomic_t sctp_memory_allocated;
 static atomic_t sctp_sockets_allocated;
 
-static void sctp_enter_memory_pressure(void)
+static void sctp_enter_memory_pressure(struct sock *sk)
 {
        sctp_memory_pressure = 1;
 }