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authorEric Dumazet <edumazet@google.com>2017-11-07 11:29:27 +0300
committerDavid S. Miller <davem@davemloft.net>2017-11-10 08:34:58 +0300
commita3dcaf17ee54f1d01d22cc2b22cab0b4f60d78cf (patch)
treeead847c4636ae85b77a1a415b53b8bf737000f4e /include
parent2ea7a679ca2abd251c1ec03f20508619707e1749 (diff)
downloadlinux-a3dcaf17ee54f1d01d22cc2b22cab0b4f60d78cf.tar.xz
net: allow per netns sysctl_rmem and sysctl_wmem for protos
As we want to gradually implement per netns sysctl_rmem and sysctl_wmem on per protocol basis, add two new fields in struct proto, and two new helpers : sk_get_wmem0() and sk_get_rmem0() First user will be TCP. Then UDP and SCTP can be easily converted, while DECNET probably wont get this support. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
-rw-r--r--include/net/sock.h22
-rw-r--r--include/trace/events/sock.h2
2 files changed, 23 insertions, 1 deletions
diff --git a/include/net/sock.h b/include/net/sock.h
index 6f1be9726e02..688a823dccc3 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -1101,8 +1101,12 @@ struct proto {
*/
unsigned long *memory_pressure;
long *sysctl_mem;
+
int *sysctl_wmem;
int *sysctl_rmem;
+ u32 sysctl_wmem_offset;
+ u32 sysctl_rmem_offset;
+
int max_header;
bool no_autobind;
@@ -2390,4 +2394,22 @@ extern int sysctl_optmem_max;
extern __u32 sysctl_wmem_default;
extern __u32 sysctl_rmem_default;
+static inline int sk_get_wmem0(const struct sock *sk, const struct proto *proto)
+{
+ /* Does this proto have per netns sysctl_wmem ? */
+ if (proto->sysctl_wmem_offset)
+ return *(int *)((void *)sock_net(sk) + proto->sysctl_wmem_offset);
+
+ return *proto->sysctl_wmem;
+}
+
+static inline int sk_get_rmem0(const struct sock *sk, const struct proto *proto)
+{
+ /* Does this proto have per netns sysctl_rmem ? */
+ if (proto->sysctl_rmem_offset)
+ return *(int *)((void *)sock_net(sk) + proto->sysctl_rmem_offset);
+
+ return *proto->sysctl_rmem;
+}
+
#endif /* _SOCK_H */
diff --git a/include/trace/events/sock.h b/include/trace/events/sock.h
index 6d31c0520ef3..ec4dade24466 100644
--- a/include/trace/events/sock.h
+++ b/include/trace/events/sock.h
@@ -48,7 +48,7 @@ TRACE_EVENT(sock_exceed_buf_limit,
strncpy(__entry->name, prot->name, 32);
__entry->sysctl_mem = prot->sysctl_mem;
__entry->allocated = allocated;
- __entry->sysctl_rmem = prot->sysctl_rmem[0];
+ __entry->sysctl_rmem = sk_get_rmem0(sk, prot);
__entry->rmem_alloc = atomic_read(&sk->sk_rmem_alloc);
),