X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;ds=sidebyside;f=include%2Fnet%2Fsock.h;h=dc42b44c2aa14b409fc9307afb6e7458773c14aa;hb=48e4043d4529523cbc7fa8dd745bd8e2c45ce1d3;hp=5504fb9fa88a43e9cbce0cf7e4a9db54b188ec3b;hpb=286ab3d46058840d68e5d7d52e316c1f7e98c59f;p=safe%2Fjmp%2Flinux-2.6 diff --git a/include/net/sock.h b/include/net/sock.h index 5504fb9..dc42b44 100644 --- a/include/net/sock.h +++ b/include/net/sock.h @@ -56,7 +56,6 @@ #include #include #include -#include /* * This structure really needs to be cleaned up. @@ -70,7 +69,11 @@ #define SOCK_DEBUG(sk, msg...) do { if ((sk) && sock_flag((sk), SOCK_DBG)) \ printk(KERN_DEBUG msg); } while (0) #else -#define SOCK_DEBUG(sk, msg...) do { } while (0) +/* Validate arguments and do nothing */ +static void inline int __attribute__ ((format (printf, 2, 3))) +SOCK_DEBUG(struct sock *sk, const char *msg, ...) +{ +} #endif /* This is the per-socket lock. The spinlock provides a synchronization @@ -94,6 +97,7 @@ typedef struct { struct sock; struct proto; +struct net; /** * struct sock_common - minimal network layer representation of sockets @@ -121,7 +125,9 @@ struct sock_common { atomic_t skc_refcnt; unsigned int skc_hash; struct proto *skc_prot; +#ifdef CONFIG_NET_NS struct net *skc_net; +#endif }; /** @@ -145,17 +151,22 @@ struct sock_common { * @sk_forward_alloc: space allocated forward * @sk_allocation: allocation mode * @sk_sndbuf: size of send buffer in bytes - * @sk_flags: %SO_LINGER (l_onoff), %SO_BROADCAST, %SO_KEEPALIVE, %SO_OOBINLINE settings + * @sk_flags: %SO_LINGER (l_onoff), %SO_BROADCAST, %SO_KEEPALIVE, + * %SO_OOBINLINE settings * @sk_no_check: %SO_NO_CHECK setting, wether or not checkup packets * @sk_route_caps: route capabilities (e.g. %NETIF_F_TSO) * @sk_gso_type: GSO type (e.g. %SKB_GSO_TCPV4) + * @sk_gso_max_size: Maximum GSO segment size to build * @sk_lingertime: %SO_LINGER l_linger setting * @sk_backlog: always used with the per-socket spinlock held * @sk_callback_lock: used with the callbacks in the end of this struct * @sk_error_queue: rarely used - * @sk_prot_creator: sk_prot of original sock creator (see ipv6_setsockopt, IPV6_ADDRFORM for instance) + * @sk_prot_creator: sk_prot of original sock creator (see ipv6_setsockopt, + * IPV6_ADDRFORM for instance) * @sk_err: last error - * @sk_err_soft: errors that don't cause failure but are the cause of a persistent failure not just 'timed out' + * @sk_err_soft: errors that don't cause failure but are the cause of a + * persistent failure not just 'timed out' + * @sk_drops: raw drops counter * @sk_ack_backlog: current listen backlog * @sk_max_ack_backlog: listen backlog set in listen() * @sk_priority: %SO_PRIORITY setting @@ -175,6 +186,7 @@ struct sock_common { * @sk_sndmsg_off: cached offset for sendmsg * @sk_send_head: front of stuff to transmit * @sk_security: used by security modules + * @sk_mark: generic packet mark * @sk_write_pending: a write to stream socket waits to start * @sk_state_change: callback to indicate change in the state of the sock * @sk_data_ready: callback to indicate there is data to be processed @@ -231,6 +243,7 @@ struct sock { gfp_t sk_allocation; int sk_route_caps; int sk_gso_type; + unsigned int sk_gso_max_size; int sk_rcvlowat; unsigned long sk_flags; unsigned long sk_lingertime; @@ -239,6 +252,7 @@ struct sock { rwlock_t sk_callback_lock; int sk_err, sk_err_soft; + atomic_t sk_drops; unsigned short sk_ack_backlog; unsigned short sk_max_ack_backlog; __u32 sk_priority; @@ -256,6 +270,8 @@ struct sock { __u32 sk_sndmsg_off; int sk_write_pending; void *sk_security; + __u32 sk_mark; + /* XXX 4 bytes hole on 64 bit */ void (*sk_state_change)(struct sock *sk); void (*sk_data_ready)(struct sock *sk, int bytes); void (*sk_write_space)(struct sock *sk); @@ -439,7 +455,7 @@ static inline int sk_acceptq_is_full(struct sock *sk) */ static inline int sk_stream_min_wspace(struct sock *sk) { - return sk->sk_wmem_queued / 2; + return sk->sk_wmem_queued >> 1; } static inline int sk_stream_wspace(struct sock *sk) @@ -454,25 +470,6 @@ 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) { @@ -507,6 +504,8 @@ extern int sk_wait_data(struct sock *sk, long *timeo); struct request_sock_ops; struct timewait_sock_ops; +struct inet_hashinfo; +struct raw_hashinfo; /* Networking protocol blocks we attach to sockets. * socket layer -> transport layer interface @@ -560,14 +559,11 @@ struct proto { void (*unhash)(struct sock *sk); int (*get_port)(struct sock *sk, unsigned short snum); -#ifdef CONFIG_SMP /* Keeping track of sockets in use */ - void (*inuse_add)(struct proto *prot, int inc); - int (*inuse_getval)(const struct proto *prot); - int *inuse_ptr; -#else - int inuse; +#ifdef CONFIG_PROC_FS + unsigned int inuse_idx; #endif + /* Memory pressure */ void (*enter_memory_pressure)(void); atomic_t *memory_allocated; /* Current allocated memory. */ @@ -575,7 +571,7 @@ 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; @@ -592,6 +588,12 @@ struct proto { struct request_sock_ops *rsk_prot; struct timewait_sock_ops *twsk_prot; + union { + struct inet_hashinfo *hashinfo; + struct hlist_head *udp_hash; + struct raw_hashinfo *raw_hash; + } h; + struct module *owner; char name[32]; @@ -602,36 +604,6 @@ struct proto { #endif }; -/* - * Special macros to let protos use a fast version of inuse{get|add} - * using a static percpu variable per proto instead of an allocated one, - * saving one dereference. - * This might be changed if/when dynamic percpu vars become fast. - */ -#ifdef CONFIG_SMP -# define DEFINE_PROTO_INUSE(NAME) \ -static DEFINE_PER_CPU(int, NAME##_inuse); \ -static void NAME##_inuse_add(struct proto *prot, int inc) \ -{ \ - __get_cpu_var(NAME##_inuse) += inc; \ -} \ - \ -static int NAME##_inuse_getval(const struct proto *prot)\ -{ \ - int res = 0, cpu; \ - \ - for_each_possible_cpu(cpu) \ - res += per_cpu(NAME##_inuse, cpu); \ - return res; \ -} -# define REF_PROTO_INUSE(NAME) \ - .inuse_add = NAME##_inuse_add, \ - .inuse_getval = NAME##_inuse_getval, -#else -# define DEFINE_PROTO_INUSE(NAME) -# define REF_PROTO_INUSE(NAME) -#endif - extern int proto_register(struct proto *prot, int alloc_slab); extern void proto_unregister(struct proto *prot); @@ -660,33 +632,18 @@ static inline void sk_refcnt_debug_release(const struct sock *sk) #define sk_refcnt_debug_release(sk) do { } while (0) #endif /* SOCK_REFCNT_DEBUG */ + +#ifdef CONFIG_PROC_FS /* Called with local bh disabled */ -static __inline__ void sock_prot_inc_use(struct proto *prot) -{ -#ifdef CONFIG_SMP - prot->inuse_add(prot, 1); +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 - prot->inuse++; -#endif -} - -static __inline__ void sock_prot_dec_use(struct proto *prot) +static void inline sock_prot_inuse_add(struct net *net, struct proto *prot, + int inc) { -#ifdef CONFIG_SMP - prot->inuse_add(prot, -1); -#else - prot->inuse--; -#endif } - -static __inline__ int sock_prot_inuse(struct proto *proto) -{ -#ifdef CONFIG_SMP - return proto->inuse_getval(proto); -#else - return proto->inuse; #endif -} + /* With per-bucket locks this operation is not-atomic, so that * this version is not worse. @@ -750,32 +707,81 @@ 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_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 DIV_ROUND_UP(amt, SK_STREAM_MEM_QUANTUM); + 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_reclaim_partial(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 @@ -812,14 +818,14 @@ do { \ lockdep_init_map(&(sk)->sk_lock.dep_map, (name), (key), 0); \ } while (0) -extern void FASTCALL(lock_sock_nested(struct sock *sk, int subclass)); +extern void lock_sock_nested(struct sock *sk, int subclass); static inline void lock_sock(struct sock *sk) { lock_sock_nested(sk, 0); } -extern void FASTCALL(release_sock(struct sock *sk)); +extern void release_sock(struct sock *sk); /* BH context may only use the following locking interface. */ #define bh_lock_sock(__sk) spin_lock(&((__sk)->sk_lock.slock)) @@ -832,6 +838,7 @@ extern struct sock *sk_alloc(struct net *net, int family, gfp_t priority, struct proto *prot); extern void sk_free(struct sock *sk); +extern void sk_release_kernel(struct sock *sk); extern struct sock *sk_clone(const struct sock *sk, const gfp_t priority); @@ -921,41 +928,6 @@ extern void sk_common_release(struct sock *sk); extern void sock_init_data(struct socket *sock, struct sock *sk); /** - * sk_filter - run a packet through a socket filter - * @sk: sock associated with &sk_buff - * @skb: buffer to filter - * @needlock: set to 1 if the sock is not locked by caller. - * - * Run the filter code and then cut skb->data to correct size returned by - * sk_run_filter. If pkt_len is 0 we toss packet. If skb->len is smaller - * than pkt_len we keep whole skb->data. This is the socket level - * wrapper to sk_run_filter. It returns 0 if the packet should - * be accepted or -EPERM if the packet should be tossed. - * - */ - -static inline int sk_filter(struct sock *sk, struct sk_buff *skb) -{ - int err; - struct sk_filter *filter; - - err = security_sock_rcv_skb(sk, skb); - if (err) - return err; - - rcu_read_lock_bh(); - filter = sk->sk_filter; - if (filter) { - unsigned int pkt_len = sk_run_filter(skb, filter->insns, - filter->len); - err = pkt_len ? pskb_trim(skb, pkt_len) : -EPERM; - } - rcu_read_unlock_bh(); - - return err; -} - -/** * sk_filter_release: Release a socket filter * @sk: socket * @fp: filter to remove @@ -1113,12 +1085,6 @@ 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) @@ -1138,7 +1104,7 @@ 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; } @@ -1164,6 +1130,7 @@ 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, @@ -1225,40 +1192,12 @@ static inline void sk_wake_async(struct sock *sk, int how, int band) static inline void sk_stream_moderate_sndbuf(struct sock *sk) { if (!(sk->sk_userlocks & SOCK_SNDBUF_LOCK)) { - sk->sk_sndbuf = min(sk->sk_sndbuf, sk->sk_wmem_queued / 2); + sk->sk_sndbuf = min(sk->sk_sndbuf, sk->sk_wmem_queued >> 1); sk->sk_sndbuf = max(sk->sk_sndbuf, SOCK_MIN_SNDBUF); } } -static inline struct sk_buff *sk_stream_alloc_pskb(struct sock *sk, - int size, int mem, - gfp_t gfp) -{ - struct sk_buff *skb; - int hdr_len; - - hdr_len = SKB_DATA_ALIGN(sk->sk_prot->max_header); - skb = alloc_skb_fclone(size + hdr_len, gfp); - if (skb) { - skb->truesize += mem; - if (sk_stream_wmem_schedule(sk, skb->truesize)) { - skb_reserve(skb, hdr_len); - return skb; - } - __kfree_skb(skb); - } else { - sk->sk_prot->enter_memory_pressure(); - sk_stream_moderate_sndbuf(sk); - } - return NULL; -} - -static inline struct sk_buff *sk_stream_alloc_skb(struct sock *sk, - int size, - gfp_t gfp) -{ - return sk_stream_alloc_pskb(sk, size, 0, gfp); -} +struct sk_buff *sk_stream_alloc_skb(struct sock *sk, int size, gfp_t gfp); static inline struct page *sk_stream_alloc_page(struct sock *sk) { @@ -1277,7 +1216,7 @@ static inline struct page *sk_stream_alloc_page(struct sock *sk) */ static inline int sock_writeable(const struct sock *sk) { - return atomic_read(&sk->sk_wmem_alloc) < (sk->sk_sndbuf / 2); + return atomic_read(&sk->sk_wmem_alloc) < (sk->sk_sndbuf >> 1); } static inline gfp_t gfp_any(void) @@ -1348,6 +1287,36 @@ static inline void sk_eat_skb(struct sock *sk, struct sk_buff *skb, int copied_e } #endif +static inline +struct net *sock_net(const struct sock *sk) +{ +#ifdef CONFIG_NET_NS + return sk->sk_net; +#else + return &init_net; +#endif +} + +static inline +void sock_net_set(struct sock *sk, struct net *net) +{ +#ifdef CONFIG_NET_NS + sk->sk_net = net; +#endif +} + +/* + * Kernel sockets, f.e. rtnl or icmp_socket, are a part of a namespace. + * They should not hold a referrence to a namespace in order to allow + * to stop it. + * Sockets after sk_change_net should be released using sk_release_kernel + */ +static inline void sk_change_net(struct sock *sk, struct net *net) +{ + put_net(sock_net(sk)); + sock_net_set(sk, hold_net(net)); +} + extern void sock_enable_timestamp(struct sock *sk); extern int sock_get_timestamp(struct sock *, struct timeval __user *); extern int sock_get_timestampns(struct sock *, struct timespec __user *); @@ -1386,23 +1355,11 @@ extern int net_msg_warn; lock_sock(sk); \ } -static inline void sock_valbool_flag(struct sock *sk, int bit, int valbool) -{ - if (valbool) - sock_set_flag(sk, bit); - else - sock_reset_flag(sk, bit); -} - extern __u32 sysctl_wmem_max; extern __u32 sysctl_rmem_max; extern void sk_init(void); -#ifdef CONFIG_SYSCTL -extern struct ctl_table core_table[]; -#endif - extern int sysctl_optmem_max; extern __u32 sysctl_wmem_default;