#include <linux/kernel.h>
#include <linux/list.h>
+#include <linux/list_nulls.h>
#include <linux/timer.h>
#include <linux/cache.h>
#include <linux/module.h>
#include <linux/security.h>
#include <linux/filter.h>
+#include <linux/rculist_nulls.h>
#include <asm/atomic.h>
#include <net/dst.h>
#include <net/checksum.h>
-#include <net/net_namespace.h>
/*
* This structure really needs to be cleaned up.
#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
struct sock;
struct proto;
+struct net;
/**
* struct sock_common - minimal network layer representation of sockets
* @skc_reuse: %SO_REUSEADDR setting
* @skc_bound_dev_if: bound device index if != 0
* @skc_node: main hash linkage for various protocol lookup tables
+ * @skc_nulls_node: main hash linkage for UDP/UDP-Lite protocol
* @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
volatile unsigned char skc_state;
unsigned char skc_reuse;
int skc_bound_dev_if;
- struct hlist_node skc_node;
+ union {
+ struct hlist_node skc_node;
+ struct hlist_nulls_node skc_nulls_node;
+ };
struct hlist_node skc_bind_node;
atomic_t skc_refcnt;
unsigned int skc_hash;
struct proto *skc_prot;
+#ifdef CONFIG_NET_NS
struct net *skc_net;
+#endif
};
/**
* @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
+ * %SO_OOBINLINE settings, %SO_TIMESTAMPING 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_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_drops: raw drops counter
+ * @sk_drops: raw/udp drops counter
* @sk_ack_backlog: current listen backlog
* @sk_max_ack_backlog: listen backlog set in listen()
* @sk_priority: %SO_PRIORITY setting
* @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
#define sk_reuse __sk_common.skc_reuse
#define sk_bound_dev_if __sk_common.skc_bound_dev_if
#define sk_node __sk_common.skc_node
+#define sk_nulls_node __sk_common.skc_nulls_node
#define sk_bind_node __sk_common.skc_bind_node
#define sk_refcnt __sk_common.skc_refcnt
#define sk_hash __sk_common.skc_hash
} sk_backlog;
wait_queue_head_t *sk_sleep;
struct dst_entry *sk_dst_cache;
+#ifdef CONFIG_XFRM
struct xfrm_policy *sk_policy[2];
+#endif
rwlock_t sk_dst_lock;
atomic_t sk_rmem_alloc;
atomic_t sk_wmem_alloc;
int sk_sndbuf;
struct sk_buff_head sk_receive_queue;
struct sk_buff_head sk_write_queue;
+#ifdef CONFIG_NET_DMA
struct sk_buff_head sk_async_wait_queue;
+#endif
int sk_wmem_queued;
int sk_forward_alloc;
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;
struct sk_buff *sk_send_head;
__u32 sk_sndmsg_off;
int sk_write_pending;
+#ifdef CONFIG_SECURITY
void *sk_security;
+#endif
+ __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);
return hlist_empty(head) ? NULL : __sk_head(head);
}
+static inline struct sock *__sk_nulls_head(const struct hlist_nulls_head *head)
+{
+ return hlist_nulls_entry(head->first, struct sock, sk_nulls_node);
+}
+
+static inline struct sock *sk_nulls_head(const struct hlist_nulls_head *head)
+{
+ return hlist_nulls_empty(head) ? NULL : __sk_nulls_head(head);
+}
+
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 struct sock *sk_nulls_next(const struct sock *sk)
+{
+ return (!is_a_nulls(sk->sk_nulls_node.next)) ?
+ hlist_nulls_entry(sk->sk_nulls_node.next,
+ struct sock, sk_nulls_node) :
+ NULL;
+}
+
static inline int sk_unhashed(const struct sock *sk)
{
return hlist_unhashed(&sk->sk_node);
node->pprev = NULL;
}
+static __inline__ void sk_nulls_node_init(struct hlist_nulls_node *node)
+{
+ node->pprev = NULL;
+}
+
static __inline__ void __sk_del_node(struct sock *sk)
{
__hlist_del(&sk->sk_node);
return rc;
}
+static __inline__ int __sk_nulls_del_node_init_rcu(struct sock *sk)
+{
+ if (sk_hashed(sk)) {
+ hlist_nulls_del_init_rcu(&sk->sk_nulls_node);
+ return 1;
+ }
+ return 0;
+}
+
+static __inline__ int sk_nulls_del_node_init_rcu(struct sock *sk)
+{
+ int rc = __sk_nulls_del_node_init_rcu(sk);
+
+ if (rc) {
+ /* paranoid for a while -acme */
+ WARN_ON(atomic_read(&sk->sk_refcnt) == 1);
+ __sock_put(sk);
+ }
+ return rc;
+}
+
static __inline__ void __sk_add_node(struct sock *sk, struct hlist_head *list)
{
hlist_add_head(&sk->sk_node, list);
__sk_add_node(sk, list);
}
+static __inline__ void __sk_nulls_add_node_rcu(struct sock *sk, struct hlist_nulls_head *list)
+{
+ hlist_nulls_add_head_rcu(&sk->sk_nulls_node, list);
+}
+
+static __inline__ void sk_nulls_add_node_rcu(struct sock *sk, struct hlist_nulls_head *list)
+{
+ sock_hold(sk);
+ __sk_nulls_add_node_rcu(sk, list);
+}
+
static __inline__ void __sk_del_bind_node(struct sock *sk)
{
__hlist_del(&sk->sk_bind_node);
#define sk_for_each(__sk, node, list) \
hlist_for_each_entry(__sk, node, list, sk_node)
+#define sk_nulls_for_each(__sk, node, list) \
+ hlist_nulls_for_each_entry(__sk, node, list, sk_nulls_node)
+#define sk_nulls_for_each_rcu(__sk, node, list) \
+ hlist_nulls_for_each_entry_rcu(__sk, node, list, sk_nulls_node)
#define sk_for_each_from(__sk, node) \
if (__sk && ({ node = &(__sk)->sk_node; 1; })) \
hlist_for_each_entry_from(__sk, node, sk_node)
+#define sk_nulls_for_each_from(__sk, node) \
+ if (__sk && ({ node = &(__sk)->sk_nulls_node; 1; })) \
+ hlist_nulls_for_each_entry_from(__sk, node, sk_nulls_node)
#define sk_for_each_continue(__sk, node) \
if (__sk && ({ node = &(__sk)->sk_node; 1; })) \
hlist_for_each_entry_continue(__sk, node, sk_node)
SOCK_RCVTSTAMPNS, /* %SO_TIMESTAMPNS setting */
SOCK_LOCALROUTE, /* route locally only, %SO_DONTROUTE setting */
SOCK_QUEUE_SHRUNK, /* write queue has been shrunk recently */
+ SOCK_TIMESTAMPING_TX_HARDWARE, /* %SOF_TIMESTAMPING_TX_HARDWARE */
+ SOCK_TIMESTAMPING_TX_SOFTWARE, /* %SOF_TIMESTAMPING_TX_SOFTWARE */
+ SOCK_TIMESTAMPING_RX_HARDWARE, /* %SOF_TIMESTAMPING_RX_HARDWARE */
+ SOCK_TIMESTAMPING_RX_SOFTWARE, /* %SOF_TIMESTAMPING_RX_SOFTWARE */
+ SOCK_TIMESTAMPING_SOFTWARE, /* %SOF_TIMESTAMPING_SOFTWARE */
+ SOCK_TIMESTAMPING_RAW_HARDWARE, /* %SOF_TIMESTAMPING_RAW_HARDWARE */
+ SOCK_TIMESTAMPING_SYS_HARDWARE, /* %SOF_TIMESTAMPING_SYS_HARDWARE */
};
static inline void sock_copy_flags(struct sock *nsk, struct sock *osk)
*/
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)
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)
{
skb->next = NULL;
}
+static inline int sk_backlog_rcv(struct sock *sk, struct sk_buff *skb)
+{
+ return sk->sk_backlog_rcv(sk, skb);
+}
+
#define sk_wait_event(__sk, __timeo, __condition) \
({ int __rc; \
release_sock(__sk); \
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
int (*ioctl)(struct sock *sk, int cmd,
unsigned long arg);
int (*init)(struct sock *sk);
- int (*destroy)(struct sock *sk);
+ void (*destroy)(struct sock *sk);
void (*shutdown)(struct sock *sk, int how);
int (*setsockopt)(struct sock *sk, int level,
int optname, char __user *optval,
int (*getsockopt)(struct sock *sk, int level,
int optname, char __user *optval,
int __user *option);
+#ifdef CONFIG_COMPAT
int (*compat_setsockopt)(struct sock *sk,
int level,
int optname, char __user *optval,
int level,
int optname, char __user *optval,
int __user *option);
+#endif
int (*sendmsg)(struct kiocb *iocb, struct sock *sk,
struct msghdr *msg, size_t len);
int (*recvmsg)(struct kiocb *iocb, struct sock *sk,
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);
+ void (*enter_memory_pressure)(struct sock *sk);
atomic_t *memory_allocated; /* Current allocated memory. */
- atomic_t *sockets_allocated; /* Current number of sockets. */
+ struct percpu_counter *sockets_allocated; /* Current number of sockets. */
/*
* 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;
int *sysctl_rmem;
int max_header;
- struct kmem_cache *slab;
+ struct kmem_cache *slab;
unsigned int obj_size;
+ int slab_flags;
- atomic_t *orphan_count;
+ struct percpu_counter *orphan_count;
struct request_sock_ops *rsk_prot;
struct timewait_sock_ops *twsk_prot;
+ union {
+ struct inet_hashinfo *hashinfo;
+ struct udp_table *udp_table;
+ struct raw_hashinfo *raw_hash;
+ } h;
+
struct module *owner;
char name[32];
#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);
#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.
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)
+{
+ 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
*/
#define sock_lock_init_class_and_name(sk, sname, skey, name, key) \
do { \
- sk->sk_lock.owned = 0; \
+ sk->sk_lock.owned = 0; \
init_waitqueue_head(&sk->sk_lock.wq); \
spin_lock_init(&(sk)->sk_lock.slock); \
debug_check_no_locks_freed((void *)&(sk)->sk_lock, \
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))
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);
unsigned long size,
int noblock,
int *errcode);
+extern struct sk_buff *sock_alloc_send_pskb(struct sock *sk,
+ unsigned long header_len,
+ unsigned long data_len,
+ int noblock,
+ int *errcode);
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 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 = rcu_dereference(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
*
* Remove a filter from a socket and release its resources.
extern int sk_receive_skb(struct sock *sk, struct sk_buff *skb,
const int nested);
+static inline void sk_set_socket(struct sock *sk, struct socket *sock)
+{
+ sk->sk_socket = sock;
+}
+
/* 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_lock_bh(&sk->sk_callback_lock);
sock_set_flag(sk, SOCK_DEAD);
- sk->sk_socket = NULL;
+ sk_set_socket(sk, NULL);
sk->sk_sleep = NULL;
write_unlock_bh(&sk->sk_callback_lock);
}
write_lock_bh(&sk->sk_callback_lock);
sk->sk_sleep = &parent->wait;
parent->sk = sk;
- sk->sk_socket = parent;
+ sk_set_socket(sk, parent);
security_sock_graft(sk, parent);
write_unlock_bh(&sk->sk_callback_lock);
}
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)
skb->data_len += copy;
skb->truesize += copy;
sk->sk_wmem_queued += copy;
- sk->sk_forward_alloc -= copy;
+ sk_mem_charge(sk, copy);
return 0;
}
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,
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;
-
- /* The TCP header must be at least 32-bit aligned. */
- size = ALIGN(size, 4);
-
- skb = alloc_skb_fclone(size + sk->sk_prot->max_header, gfp);
- if (skb) {
- skb->truesize += mem;
- if (sk_stream_wmem_schedule(sk, skb->truesize)) {
- /*
- * Make sure that we have exactly size bytes
- * available to the caller, no more, no less.
- */
- skb_reserve(skb, skb_tailroom(skb) - size);
- 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)
{
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;
*/
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)
{
- return in_atomic() ? GFP_ATOMIC : GFP_KERNEL;
+ return in_softirq() ? GFP_ATOMIC : GFP_KERNEL;
}
static inline long sock_rcvtimeo(const struct sock *sk, int noblock)
sock_recv_timestamp(struct msghdr *msg, struct sock *sk, struct sk_buff *skb)
{
ktime_t kt = skb->tstamp;
+ struct skb_shared_hwtstamps *hwtstamps = skb_hwtstamps(skb);
- if (sock_flag(sk, SOCK_RCVTSTAMP))
+ /*
+ * generate control messages if
+ * - receive time stamping in software requested (SOCK_RCVTSTAMP
+ * or SOCK_TIMESTAMPING_RX_SOFTWARE)
+ * - software time stamp available and wanted
+ * (SOCK_TIMESTAMPING_SOFTWARE)
+ * - hardware time stamps available and wanted
+ * (SOCK_TIMESTAMPING_SYS_HARDWARE or
+ * SOCK_TIMESTAMPING_RAW_HARDWARE)
+ */
+ if (sock_flag(sk, SOCK_RCVTSTAMP) ||
+ sock_flag(sk, SOCK_TIMESTAMPING_RX_SOFTWARE) ||
+ (kt.tv64 && sock_flag(sk, SOCK_TIMESTAMPING_SOFTWARE)) ||
+ (hwtstamps->hwtstamp.tv64 &&
+ sock_flag(sk, SOCK_TIMESTAMPING_RAW_HARDWARE)) ||
+ (hwtstamps->syststamp.tv64 &&
+ sock_flag(sk, SOCK_TIMESTAMPING_SYS_HARDWARE)))
__sock_recv_timestamp(msg, sk, skb);
else
sk->sk_stamp = kt;
}
/**
+ * sock_tx_timestamp - checks whether the outgoing packet is to be time stamped
+ * @msg: outgoing packet
+ * @sk: socket sending this packet
+ * @shtx: filled with instructions for time stamping
+ *
+ * Currently only depends on SOCK_TIMESTAMPING* flags. Returns error code if
+ * parameters are invalid.
+ */
+extern int sock_tx_timestamp(struct msghdr *msg,
+ struct sock *sk,
+ union skb_shared_tx *shtx);
+
+
+/**
* sk_eat_skb - Release a skb if it is no longer needed
* @sk: socket to eat this skb from
* @skb: socket buffer to eat
}
#endif
-extern void sock_enable_timestamp(struct sock *sk);
+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));
+}
+
+static inline struct sock *skb_steal_sock(struct sk_buff *skb)
+{
+ if (unlikely(skb->sk)) {
+ struct sock *sk = skb->sk;
+
+ skb->destructor = NULL;
+ skb->sk = NULL;
+ return sk;
+ }
+ return NULL;
+}
+
+extern void sock_enable_timestamp(struct sock *sk, int flag);
extern int sock_get_timestamp(struct sock *, struct timeval __user *);
extern int sock_get_timestampns(struct sock *, struct timespec __user *);
#define LIMIT_NETDEBUG(fmt, args...) \
do { if (net_msg_warn && net_ratelimit()) printk(fmt,##args); } while(0)
-/*
- * Macros for sleeping on a socket. Use them like this:
- *
- * SOCK_SLEEP_PRE(sk)
- * if (condition)
- * schedule();
- * SOCK_SLEEP_POST(sk)
- *
- * N.B. These are now obsolete and were, afaik, only ever used in DECnet
- * and when the last use of them in DECnet has gone, I'm intending to
- * remove them.
- */
-
-#define SOCK_SLEEP_PRE(sk) { struct task_struct *tsk = current; \
- DECLARE_WAITQUEUE(wait, tsk); \
- tsk->state = TASK_INTERRUPTIBLE; \
- add_wait_queue((sk)->sk_sleep, &wait); \
- release_sock(sk);
-
-#define SOCK_SLEEP_POST(sk) tsk->state = TASK_RUNNING; \
- remove_wait_queue((sk)->sk_sleep, &wait); \
- 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;
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff