*/
/* Define this to get the SOCK_DBG debugging facility. */
-#define SOCK_DEBUGGING
+//#define SOCK_DEBUGGING
#ifdef SOCK_DEBUGGING
#define SOCK_DEBUG(sk, msg...) do { if ((sk) && sock_flag((sk), SOCK_DBG)) \
printk(KERN_DEBUG msg); } while (0)
} while(0)
struct sock;
+struct proto;
/**
* struct sock_common - minimal network layer representation of sockets
* @skc_node: main hash linkage for various protocol lookup tables
* @skc_bind_node: bind hash linkage for various protocol lookup tables
* @skc_refcnt: reference count
+ * @skc_hash: hash value used with various protocol lookup tables
+ * @skc_prot: protocol handlers inside a network family
*
* This is the minimal network layer representation of sockets, the header
- * for struct sock and struct tcp_tw_bucket.
- */
+ * for struct sock and struct inet_timewait_sock.
+ */
struct sock_common {
unsigned short skc_family;
volatile unsigned char skc_state;
struct hlist_node skc_node;
struct hlist_node skc_bind_node;
atomic_t skc_refcnt;
+ unsigned int skc_hash;
+ struct proto *skc_prot;
xid_t skc_xid;
- struct vx_info *skc_vx_info;
+ struct vx_info *skc_vx_info;
nid_t skc_nid;
- struct nx_info *skc_nx_info;
+ struct nx_info *skc_nx_info;
};
/**
* struct sock - network layer representation of sockets
- * @__sk_common: shared layout with tcp_tw_bucket
+ * @__sk_common: shared layout with inet_timewait_sock
* @sk_shutdown: mask of %SEND_SHUTDOWN and/or %RCV_SHUTDOWN
* @sk_userlocks: %SO_SNDBUF and %SO_RCVBUF settings
* @sk_lock: synchronizer
* @sk_no_check: %SO_NO_CHECK setting, wether or not checkup packets
* @sk_route_caps: route capabilities (e.g. %NETIF_F_TSO)
* @sk_lingertime: %SO_LINGER l_linger setting
- * @sk_hashent: hash entry in several tables (e.g. tcp_ehash)
* @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: protocol handlers inside a network family
* @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_timer: sock cleanup timer
* @sk_stamp: time stamp of last packet received
* @sk_socket: Identd and reporting IO signals
- * @sk_user_data: RPC layer private data
+ * @sk_user_data: RPC and Tux layer private data
* @sk_sndmsg_page: cached page for sendmsg
* @sk_sndmsg_off: cached offset for sendmsg
* @sk_send_head: front of stuff to transmit
* @sk_data_ready: callback to indicate there is data to be processed
* @sk_write_space: callback to indicate there is bf sending space available
* @sk_error_report: callback to indicate errors (e.g. %MSG_ERRQUEUE)
+ * @sk_create_child - callback to get new socket events
* @sk_backlog_rcv: callback to process the backlog
* @sk_destruct: called at sock freeing time, i.e. when all refcnt == 0
*/
struct sock {
/*
- * Now struct tcp_tw_bucket also uses sock_common, so please just
+ * Now struct inet_timewait_sock also uses sock_common, so please just
* don't add nothing before this first member (__sk_common) --acme
*/
struct sock_common __sk_common;
#define sk_node __sk_common.skc_node
#define sk_bind_node __sk_common.skc_bind_node
#define sk_refcnt __sk_common.skc_refcnt
+#define sk_hash __sk_common.skc_hash
+#define sk_prot __sk_common.skc_prot
#define sk_xid __sk_common.skc_xid
#define sk_vx_info __sk_common.skc_vx_info
#define sk_nid __sk_common.skc_nid
struct sk_buff_head sk_write_queue;
int sk_wmem_queued;
int sk_forward_alloc;
- unsigned int sk_allocation;
+ gfp_t sk_allocation;
int sk_sndbuf;
int sk_route_caps;
- int sk_hashent;
+ int sk_rcvlowat;
unsigned long sk_flags;
unsigned long sk_lingertime;
/*
struct sk_buff *tail;
} sk_backlog;
struct sk_buff_head sk_error_queue;
- struct proto *sk_prot;
struct proto *sk_prot_creator;
rwlock_t sk_callback_lock;
int sk_err,
unsigned short sk_max_ack_backlog;
__u32 sk_priority;
struct ucred sk_peercred;
- int sk_rcvlowat;
long sk_rcvtimeo;
long sk_sndtimeo;
struct sk_filter *sk_filter;
void (*sk_error_report)(struct sock *sk);
int (*sk_backlog_rcv)(struct sock *sk,
struct sk_buff *skb);
+ void (*sk_create_child)(struct sock *sk, struct sock *newsk);
void (*sk_destruct)(struct sock *sk);
};
/*
* Hashed lists helper routines
*/
-static inline struct sock *__sk_head(struct hlist_head *head)
+static inline struct sock *__sk_head(const struct hlist_head *head)
{
return hlist_entry(head->first, struct sock, sk_node);
}
-static inline struct sock *sk_head(struct hlist_head *head)
+static inline struct sock *sk_head(const struct hlist_head *head)
{
return hlist_empty(head) ? NULL : __sk_head(head);
}
-static inline struct sock *sk_next(struct sock *sk)
+static inline struct sock *sk_next(const struct sock *sk)
{
return sk->sk_node.next ?
hlist_entry(sk->sk_node.next, struct sock, sk_node) : NULL;
}
-static inline int sk_unhashed(struct sock *sk)
+static inline int sk_unhashed(const struct sock *sk)
{
return hlist_unhashed(&sk->sk_node);
}
-static inline int sk_hashed(struct sock *sk)
+static inline int sk_hashed(const struct sock *sk)
{
- return sk->sk_node.pprev != NULL;
+ return !sk_unhashed(sk);
}
static __inline__ void sk_node_init(struct hlist_node *node)
SOCK_QUEUE_SHRUNK, /* write queue has been shrunk recently */
};
+static inline void sock_copy_flags(struct sock *nsk, struct sock *osk)
+{
+ nsk->sk_flags = osk->sk_flags;
+}
+
static inline void sock_set_flag(struct sock *sk, enum sock_flags flag)
{
__set_bit(flag, &sk->sk_flags);
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;
}
/* The per-socket spinlock must be held here. */
-#define sk_add_backlog(__sk, __skb) \
-do { if (!(__sk)->sk_backlog.tail) { \
- (__sk)->sk_backlog.head = \
- (__sk)->sk_backlog.tail = (__skb); \
- } else { \
- ((__sk)->sk_backlog.tail)->next = (__skb); \
- (__sk)->sk_backlog.tail = (__skb); \
- } \
- (__skb)->next = NULL; \
-} while(0)
+static inline void sk_add_backlog(struct sock *sk, struct sk_buff *skb)
+{
+ if (!sk->sk_backlog.tail) {
+ sk->sk_backlog.head = sk->sk_backlog.tail = skb;
+ } else {
+ sk->sk_backlog.tail->next = skb;
+ sk->sk_backlog.tail = skb;
+ }
+ skb->next = NULL;
+}
#define sk_wait_event(__sk, __timeo, __condition) \
({ int rc; \
rc = __condition; \
if (!rc) { \
*(__timeo) = schedule_timeout(*(__timeo)); \
- rc = __condition; \
} \
lock_sock(__sk); \
+ rc = __condition; \
rc; \
})
extern int sk_wait_data(struct sock *sk, long *timeo);
+struct request_sock_ops;
+struct timewait_sock_ops;
+
/* Networking protocol blocks we attach to sockets.
* socket layer -> transport layer interface
* transport -> network interface is defined by struct inet_proto
int (*getsockopt)(struct sock *sk, int level,
int optname, char __user *optval,
int __user *option);
+ int (*compat_setsockopt)(struct sock *sk,
+ int level,
+ int optname, char __user *optval,
+ int optlen);
+ int (*compat_getsockopt)(struct sock *sk,
+ int level,
+ int optname, char __user *optval,
+ int __user *option);
int (*sendmsg)(struct kiocb *iocb, struct sock *sk,
struct msghdr *msg, size_t len);
int (*recvmsg)(struct kiocb *iocb, struct sock *sk,
kmem_cache_t *slab;
unsigned int obj_size;
+ atomic_t *orphan_count;
+
+ struct request_sock_ops *rsk_prot;
+ struct timewait_sock_ops *twsk_prot;
+
struct module *owner;
char name[32];
struct list_head node;
-
+#ifdef SOCK_REFCNT_DEBUG
+ atomic_t socks;
+#endif
struct {
int inuse;
u8 __pad[SMP_CACHE_BYTES - sizeof(int)];
extern int proto_register(struct proto *prot, int alloc_slab);
extern void proto_unregister(struct proto *prot);
+#ifdef SOCK_REFCNT_DEBUG
+static inline void sk_refcnt_debug_inc(struct sock *sk)
+{
+ atomic_inc(&sk->sk_prot->socks);
+}
+
+static inline void sk_refcnt_debug_dec(struct sock *sk)
+{
+ atomic_dec(&sk->sk_prot->socks);
+ printk(KERN_DEBUG "%s socket %p released, %d are still alive\n",
+ sk->sk_prot->name, sk, atomic_read(&sk->sk_prot->socks));
+}
+
+static inline void sk_refcnt_debug_release(const struct sock *sk)
+{
+ if (atomic_read(&sk->sk_refcnt) != 1)
+ printk(KERN_DEBUG "Destruction of the %s socket %p delayed, refcnt=%d\n",
+ sk->sk_prot->name, sk, atomic_read(&sk->sk_refcnt));
+}
+#else /* SOCK_REFCNT_DEBUG */
+#define sk_refcnt_debug_inc(sk) do { } while (0)
+#define sk_refcnt_debug_dec(sk) do { } while (0)
+#define sk_refcnt_debug_release(sk) do { } while (0)
+#endif /* SOCK_REFCNT_DEBUG */
+
/* Called with local bh disabled */
static __inline__ void sock_prot_inc_use(struct proto *prot)
{
prot->stats[smp_processor_id()].inuse--;
}
+/* With per-bucket locks this operation is not-atomic, so that
+ * this version is not worse.
+ */
+static inline void __sk_prot_rehash(struct sock *sk)
+{
+ sk->sk_prot->unhash(sk);
+ sk->sk_prot->hash(sk);
+}
+
/* About 10 seconds */
#define SOCK_DESTROY_TIME (10*HZ)
sk_stream_mem_schedule(sk, skb->truesize, 1);
}
+static inline int sk_stream_wmem_schedule(struct sock *sk, int size)
+{
+ return size <= sk->sk_forward_alloc ||
+ sk_stream_mem_schedule(sk, size, 0);
+}
+
/* Used by processes to "lock" a socket state, so that
* interrupts and bottom half handlers won't change it
* from under us. It essentially blocks any incoming
#define bh_lock_sock(__sk) spin_lock(&((__sk)->sk_lock.slock))
#define bh_unlock_sock(__sk) spin_unlock(&((__sk)->sk_lock.slock))
-extern struct sock *sk_alloc(int family, int priority,
+extern struct sock *sk_alloc(int family,
+ gfp_t priority,
struct proto *prot, int zero_it);
extern void sk_free(struct sock *sk);
+extern struct sock *sk_clone(struct sock *sk,
+ const gfp_t priority);
extern struct sk_buff *sock_wmalloc(struct sock *sk,
unsigned long size, int force,
- int priority);
+ gfp_t priority);
extern struct sk_buff *sock_rmalloc(struct sock *sk,
unsigned long size, int force,
- int priority);
+ gfp_t priority);
extern void sock_wfree(struct sk_buff *skb);
extern void sock_rfree(struct sk_buff *skb);
unsigned long size,
int noblock,
int *errcode);
-extern void *sock_kmalloc(struct sock *sk, int size, int priority);
+extern void *sock_kmalloc(struct sock *sk, int size,
+ gfp_t priority);
extern void sock_kfree_s(struct sock *sk, void *mem, int size);
extern void sk_send_sigurg(struct sock *sk);
struct msghdr *msg, size_t size, int flags);
extern int sock_common_setsockopt(struct socket *sock, int level, int optname,
char __user *optval, int optlen);
+extern int compat_sock_common_getsockopt(struct socket *sock, int level,
+ int optname, char __user *optval, int __user *optlen);
+extern int compat_sock_common_setsockopt(struct socket *sock, int level,
+ int optname, char __user *optval, int optlen);
extern void sk_common_release(struct sock *sk);
filter = sk->sk_filter;
if (filter) {
- int pkt_len = sk_run_filter(skb, filter->insns,
- filter->len);
+ unsigned int pkt_len = sk_run_filter(skb, filter->insns,
+ filter->len);
if (!pkt_len)
err = -EPERM;
else
sk_free(sk);
}
+extern int sk_receive_skb(struct sock *sk, struct sk_buff *skb);
+
/* Detach socket from process context.
* Announce socket dead, detach it from wait queue and inode.
* Note that parent inode held reference count on this struct sock,
write_unlock(&sk->sk_dst_lock);
}
-static inline struct dst_entry *
-__sk_dst_check(struct sock *sk, u32 cookie)
-{
- struct dst_entry *dst = sk->sk_dst_cache;
-
- if (dst && dst->obsolete && dst->ops->check(dst, cookie) == NULL) {
- sk->sk_dst_cache = NULL;
- dst_release(dst);
- return NULL;
- }
+extern struct dst_entry *__sk_dst_check(struct sock *sk, u32 cookie);
- return dst;
-}
+extern struct dst_entry *sk_dst_check(struct sock *sk, u32 cookie);
-static inline struct dst_entry *
-sk_dst_check(struct sock *sk, u32 cookie)
+static inline void sk_setup_caps(struct sock *sk, struct dst_entry *dst)
{
- struct dst_entry *dst = sk_dst_get(sk);
-
- if (dst && dst->obsolete && dst->ops->check(dst, cookie) == NULL) {
- sk_dst_reset(sk);
- dst_release(dst);
- return NULL;
+ __sk_dst_set(sk, dst);
+ sk->sk_route_caps = dst->dev->features;
+ if (sk->sk_route_caps & NETIF_F_TSO) {
+ if (sock_flag(sk, SOCK_NO_LARGESEND) || dst->header_len)
+ sk->sk_route_caps &= ~NETIF_F_TSO;
}
-
- return dst;
}
static inline void sk_charge_skb(struct sock *sk, struct sk_buff *skb)
extern void sk_stop_timer(struct sock *sk, struct timer_list* timer);
-static inline int sock_queue_rcv_skb(struct sock *sk, struct sk_buff *skb)
-{
- int err = 0;
- int skb_len;
-
- /* Cast skb->rcvbuf to unsigned... It's pointless, but reduces
- number of warnings when compiling with -W --ANK
- */
- if (atomic_read(&sk->sk_rmem_alloc) + skb->truesize >=
- (unsigned)sk->sk_rcvbuf) {
- err = -ENOMEM;
- goto out;
- }
-
- /* It would be deadlock, if sock_queue_rcv_skb is used
- with socket lock! We assume that users of this
- function are lock free.
- */
- err = sk_filter(sk, skb, 1);
- if (err)
- goto out;
-
- skb->dev = NULL;
- skb_set_owner_r(skb, sk);
-
- /* Cache the SKB length before we tack it onto the receive
- * queue. Once it is added it no longer belongs to us and
- * may be freed by other threads of control pulling packets
- * from the queue.
- */
- skb_len = skb->len;
-
- skb_queue_tail(&sk->sk_receive_queue, skb);
-
- if (!sock_flag(sk, SOCK_DEAD))
- sk->sk_data_ready(sk, skb_len);
-out:
- return err;
-}
+extern int sock_queue_rcv_skb(struct sock *sk, struct sk_buff *skb);
static inline int sock_queue_err_skb(struct sock *sk, struct sk_buff *skb)
{
static inline int sock_error(struct sock *sk)
{
- int err = xchg(&sk->sk_err, 0);
+ int err;
+ if (likely(!sk->sk_err))
+ return 0;
+ err = xchg(&sk->sk_err, 0);
return -err;
}
}
static inline struct sk_buff *sk_stream_alloc_pskb(struct sock *sk,
- int size, int mem, int gfp)
+ int size, int mem,
+ gfp_t gfp)
{
- struct sk_buff *skb = alloc_skb(size + sk->sk_prot->max_header, 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->sk_forward_alloc >= (int)skb->truesize ||
- sk_stream_mem_schedule(sk, skb->truesize, 0)) {
- skb_reserve(skb, sk->sk_prot->max_header);
+ if (sk_stream_wmem_schedule(sk, skb->truesize)) {
+ skb_reserve(skb, hdr_len);
return skb;
}
__kfree_skb(skb);
}
static inline struct sk_buff *sk_stream_alloc_skb(struct sock *sk,
- int size, int gfp)
+ int size,
+ gfp_t gfp)
{
return sk_stream_alloc_pskb(sk, size, 0, gfp);
}
{
struct page *page = NULL;
- if (sk->sk_forward_alloc >= (int)PAGE_SIZE ||
- sk_stream_mem_schedule(sk, PAGE_SIZE, 0))
- page = alloc_pages(sk->sk_allocation, 0);
- else {
+ page = alloc_pages(sk->sk_allocation, 0);
+ if (!page) {
sk->sk_prot->enter_memory_pressure();
sk_stream_moderate_sndbuf(sk);
}
(skb != (struct sk_buff *)&(sk)->sk_write_queue); \
skb = skb->next)
+/*from STCP for fast SACK Process*/
+#define sk_stream_for_retrans_queue_from(skb, sk) \
+ for (; (skb != (sk)->sk_send_head) && \
+ (skb != (struct sk_buff *)&(sk)->sk_write_queue); \
+ skb = skb->next)
+
/*
* Default write policy as shown to user space via poll/select/SIGIO
*/
return atomic_read(&sk->sk_wmem_alloc) < (sk->sk_sndbuf / 2);
}
-static inline int gfp_any(void)
+static inline gfp_t gfp_any(void)
{
return in_softirq() ? GFP_ATOMIC : GFP_KERNEL;
}
static __inline__ void
sock_recv_timestamp(struct msghdr *msg, struct sock *sk, struct sk_buff *skb)
{
- struct timeval *stamp = &skb->stamp;
+ struct timeval stamp;
+
+ skb_get_timestamp(skb, &stamp);
if (sock_flag(sk, SOCK_RCVTSTAMP)) {
/* Race occurred between timestamp enabling and packet
receiving. Fill in the current time for now. */
- if (stamp->tv_sec == 0)
- do_gettimeofday(stamp);
+ if (stamp.tv_sec == 0)
+ do_gettimeofday(&stamp);
+ skb_set_timestamp(skb, &stamp);
put_cmsg(msg, SOL_SOCKET, SO_TIMESTAMP, sizeof(struct timeval),
- stamp);
+ &stamp);
} else
- sk->sk_stamp = *stamp;
+ sk->sk_stamp = stamp;
}
/**
* Enable debug/info messages
*/
-#if 0
-#define NETDEBUG(x) do { } while (0)
-#define LIMIT_NETDEBUG(x) do {} while(0)
+#ifdef CONFIG_NETDEBUG
+#define NETDEBUG(fmt, args...) printk(fmt,##args)
+#define LIMIT_NETDEBUG(fmt, args...) do { if (net_ratelimit()) printk(fmt,##args); } while(0)
#else
-#define NETDEBUG(x) do { x; } while (0)
-#define LIMIT_NETDEBUG(x) do { if (net_ratelimit()) { x; } } while(0)
+#define NETDEBUG(fmt, args...) do { } while (0)
+#define LIMIT_NETDEBUG(fmt, args...) do { } while(0)
#endif
/*
}
#endif
+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;
+extern __u32 sysctl_rmem_default;
+
#endif /* _SOCK_H */
git://git.onelab.eu / linux-2.6.git / blobdiff