diff options
Diffstat (limited to 'include/net/sock.h')
| -rw-r--r-- | include/net/sock.h | 98 |
1 files changed, 57 insertions, 41 deletions
diff --git a/include/net/sock.h b/include/net/sock.h index d27ba6fdd03..3d938f6c672 100644 --- a/include/net/sock.h +++ b/include/net/sock.h @@ -460,25 +460,6 @@ static inline int sk_stream_memory_free(struct sock *sk) return sk->sk_wmem_queued < sk->sk_sndbuf; } -extern void sk_stream_rfree(struct sk_buff *skb); - -static inline void sk_stream_set_owner_r(struct sk_buff *skb, struct sock *sk) -{ - skb->sk = sk; - skb->destructor = sk_stream_rfree; - atomic_add(skb->truesize, &sk->sk_rmem_alloc); - sk->sk_forward_alloc -= skb->truesize; -} - -static inline void sk_stream_free_skb(struct sock *sk, struct sk_buff *skb) -{ - skb_truesize_check(skb); - sock_set_flag(sk, SOCK_QUEUE_SHRUNK); - sk->sk_wmem_queued -= skb->truesize; - sk->sk_forward_alloc += skb->truesize; - __kfree_skb(skb); -} - /* The per-socket spinlock must be held here. */ static inline void sk_add_backlog(struct sock *sk, struct sk_buff *skb) { @@ -576,7 +557,7 @@ struct proto { /* * Pressure flag: try to collapse. * Technical note: it is used by multiple contexts non atomically. - * All the sk_stream_mem_schedule() is of this nature: accounting + * All the __sk_mem_schedule() is of this nature: accounting * is strict, actions are advisory and have some latency. */ int *memory_pressure; @@ -712,33 +693,73 @@ static inline struct inode *SOCK_INODE(struct socket *socket) return &container_of(socket, struct socket_alloc, socket)->vfs_inode; } -extern void __sk_stream_mem_reclaim(struct sock *sk); -extern int sk_stream_mem_schedule(struct sock *sk, int size, int kind); +/* + * Functions for memory accounting + */ +extern int __sk_mem_schedule(struct sock *sk, int size, int kind); +extern void __sk_mem_reclaim(struct sock *sk); -#define SK_STREAM_MEM_QUANTUM ((int)PAGE_SIZE) -#define SK_STREAM_MEM_QUANTUM_SHIFT ilog2(SK_STREAM_MEM_QUANTUM) +#define SK_MEM_QUANTUM ((int)PAGE_SIZE) +#define SK_MEM_QUANTUM_SHIFT ilog2(SK_MEM_QUANTUM) +#define SK_MEM_SEND 0 +#define SK_MEM_RECV 1 -static inline int sk_stream_pages(int amt) +static inline int sk_mem_pages(int amt) { - return (amt + SK_STREAM_MEM_QUANTUM - 1) >> SK_STREAM_MEM_QUANTUM_SHIFT; + return (amt + SK_MEM_QUANTUM - 1) >> SK_MEM_QUANTUM_SHIFT; } -static inline void sk_stream_mem_reclaim(struct sock *sk) +static inline int sk_has_account(struct sock *sk) { - if (sk->sk_forward_alloc >= SK_STREAM_MEM_QUANTUM) - __sk_stream_mem_reclaim(sk); + /* return true if protocol supports memory accounting */ + return !!sk->sk_prot->memory_allocated; } -static inline int sk_stream_rmem_schedule(struct sock *sk, struct sk_buff *skb) +static inline int sk_wmem_schedule(struct sock *sk, int size) { - return (int)skb->truesize <= sk->sk_forward_alloc || - sk_stream_mem_schedule(sk, skb->truesize, 1); + if (!sk_has_account(sk)) + return 1; + return size <= sk->sk_forward_alloc || + __sk_mem_schedule(sk, size, SK_MEM_SEND); } -static inline int sk_stream_wmem_schedule(struct sock *sk, int size) +static inline int sk_rmem_schedule(struct sock *sk, int size) { + if (!sk_has_account(sk)) + return 1; return size <= sk->sk_forward_alloc || - sk_stream_mem_schedule(sk, size, 0); + __sk_mem_schedule(sk, size, SK_MEM_RECV); +} + +static inline void sk_mem_reclaim(struct sock *sk) +{ + if (!sk_has_account(sk)) + return; + if (sk->sk_forward_alloc >= SK_MEM_QUANTUM) + __sk_mem_reclaim(sk); +} + +static inline void sk_mem_charge(struct sock *sk, int size) +{ + if (!sk_has_account(sk)) + return; + sk->sk_forward_alloc -= size; +} + +static inline void sk_mem_uncharge(struct sock *sk, int size) +{ + if (!sk_has_account(sk)) + return; + sk->sk_forward_alloc += size; +} + +static inline void sk_wmem_free_skb(struct sock *sk, struct sk_buff *skb) +{ + skb_truesize_check(skb); + sock_set_flag(sk, SOCK_QUEUE_SHRUNK); + sk->sk_wmem_queued -= skb->truesize; + sk_mem_uncharge(sk, skb->truesize); + __kfree_skb(skb); } /* Used by processes to "lock" a socket state, so that @@ -1076,12 +1097,6 @@ static inline int sk_can_gso(const struct sock *sk) extern void sk_setup_caps(struct sock *sk, struct dst_entry *dst); -static inline void sk_charge_skb(struct sock *sk, struct sk_buff *skb) -{ - sk->sk_wmem_queued += skb->truesize; - sk->sk_forward_alloc -= skb->truesize; -} - static inline int skb_copy_to_page(struct sock *sk, char __user *from, struct sk_buff *skb, struct page *page, int off, int copy) @@ -1101,7 +1116,7 @@ static inline int skb_copy_to_page(struct sock *sk, char __user *from, skb->data_len += copy; skb->truesize += copy; sk->sk_wmem_queued += copy; - sk->sk_forward_alloc -= copy; + sk_mem_charge(sk, copy); return 0; } @@ -1127,6 +1142,7 @@ static inline void skb_set_owner_r(struct sk_buff *skb, struct sock *sk) skb->sk = sk; skb->destructor = sock_rfree; atomic_add(skb->truesize, &sk->sk_rmem_alloc); + sk_mem_charge(sk, skb->truesize); } extern void sk_reset_timer(struct sock *sk, struct timer_list* timer, |