aboutsummaryrefslogtreecommitdiff
path: root/include/net/sock.h
diff options
context:
space:
mode:
Diffstat (limited to 'include/net/sock.h')
-rw-r--r--include/net/sock.h1132
1 files changed, 820 insertions, 312 deletions
diff --git a/include/net/sock.h b/include/net/sock.h
index 717cfbf649d..15635074570 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -40,18 +40,25 @@
#ifndef _SOCK_H
#define _SOCK_H
+#include <linux/hardirq.h>
#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/bitops.h>
#include <linux/lockdep.h>
#include <linux/netdevice.h>
#include <linux/skbuff.h> /* struct sk_buff */
#include <linux/mm.h>
#include <linux/security.h>
#include <linux/slab.h>
+#include <linux/uaccess.h>
+#include <linux/memcontrol.h>
+#include <linux/res_counter.h>
+#include <linux/static_key.h>
+#include <linux/aio.h>
+#include <linux/sched.h>
#include <linux/filter.h>
#include <linux/rculist_nulls.h>
@@ -61,6 +68,22 @@
#include <net/dst.h>
#include <net/checksum.h>
+struct cgroup;
+struct cgroup_subsys;
+#ifdef CONFIG_NET
+int mem_cgroup_sockets_init(struct mem_cgroup *memcg, struct cgroup_subsys *ss);
+void mem_cgroup_sockets_destroy(struct mem_cgroup *memcg);
+#else
+static inline
+int mem_cgroup_sockets_init(struct mem_cgroup *memcg, struct cgroup_subsys *ss)
+{
+ return 0;
+}
+static inline
+void mem_cgroup_sockets_destroy(struct mem_cgroup *memcg)
+{
+}
+#endif
/*
* This structure really needs to be cleaned up.
* Most of it is for TCP, and not used by any of
@@ -74,8 +97,8 @@
printk(KERN_DEBUG msg); } while (0)
#else
/* Validate arguments and do nothing */
-static inline void __attribute__ ((format (printf, 2, 3)))
-SOCK_DEBUG(struct sock *sk, const char *msg, ...)
+static inline __printf(2, 3)
+void SOCK_DEBUG(const struct sock *sk, const char *msg, ...)
{
}
#endif
@@ -103,44 +126,62 @@ struct sock;
struct proto;
struct net;
+typedef __u32 __bitwise __portpair;
+typedef __u64 __bitwise __addrpair;
+
/**
* struct sock_common - minimal network layer representation of sockets
- * @skc_node: main hash linkage for various protocol lookup tables
- * @skc_nulls_node: main hash linkage for TCP/UDP/UDP-Lite protocol
- * @skc_refcnt: reference count
- * @skc_tx_queue_mapping: tx queue number for this connection
+ * @skc_daddr: Foreign IPv4 addr
+ * @skc_rcv_saddr: Bound local IPv4 addr
* @skc_hash: hash value used with various protocol lookup tables
* @skc_u16hashes: two u16 hash values used by UDP lookup tables
+ * @skc_dport: placeholder for inet_dport/tw_dport
+ * @skc_num: placeholder for inet_num/tw_num
* @skc_family: network address family
* @skc_state: Connection state
* @skc_reuse: %SO_REUSEADDR setting
+ * @skc_reuseport: %SO_REUSEPORT setting
* @skc_bound_dev_if: bound device index if != 0
* @skc_bind_node: bind hash linkage for various protocol lookup tables
* @skc_portaddr_node: second hash linkage for UDP/UDP-Lite protocol
* @skc_prot: protocol handlers inside a network family
* @skc_net: reference to the network namespace of this socket
+ * @skc_node: main hash linkage for various protocol lookup tables
+ * @skc_nulls_node: main hash linkage for TCP/UDP/UDP-Lite protocol
+ * @skc_tx_queue_mapping: tx queue number for this connection
+ * @skc_refcnt: reference count
*
* This is the minimal network layer representation of sockets, the header
* for struct sock and struct inet_timewait_sock.
*/
struct sock_common {
- /*
- * first fields are not copied in sock_copy()
+ /* skc_daddr and skc_rcv_saddr must be grouped on a 8 bytes aligned
+ * address on 64bit arches : cf INET_MATCH()
*/
union {
- struct hlist_node skc_node;
- struct hlist_nulls_node skc_nulls_node;
+ __addrpair skc_addrpair;
+ struct {
+ __be32 skc_daddr;
+ __be32 skc_rcv_saddr;
+ };
};
- atomic_t skc_refcnt;
- int skc_tx_queue_mapping;
-
union {
unsigned int skc_hash;
__u16 skc_u16hashes[2];
};
+ /* skc_dport && skc_num must be grouped as well */
+ union {
+ __portpair skc_portpair;
+ struct {
+ __be16 skc_dport;
+ __u16 skc_num;
+ };
+ };
+
unsigned short skc_family;
volatile unsigned char skc_state;
- unsigned char skc_reuse;
+ unsigned char skc_reuse:4;
+ unsigned char skc_reuseport:4;
int skc_bound_dev_if;
union {
struct hlist_node skc_bind_node;
@@ -150,8 +191,31 @@ struct sock_common {
#ifdef CONFIG_NET_NS
struct net *skc_net;
#endif
+
+#if IS_ENABLED(CONFIG_IPV6)
+ struct in6_addr skc_v6_daddr;
+ struct in6_addr skc_v6_rcv_saddr;
+#endif
+
+ /*
+ * fields between dontcopy_begin/dontcopy_end
+ * are not copied in sock_copy()
+ */
+ /* private: */
+ int skc_dontcopy_begin[0];
+ /* public: */
+ union {
+ struct hlist_node skc_node;
+ struct hlist_nulls_node skc_nulls_node;
+ };
+ int skc_tx_queue_mapping;
+ atomic_t skc_refcnt;
+ /* private: */
+ int skc_dontcopy_end[0];
+ /* public: */
};
+struct cg_proto;
/**
* struct sock - network layer representation of sockets
* @__sk_common: shared layout with inet_timewait_sock
@@ -160,10 +224,10 @@ struct sock_common {
* @sk_lock: synchronizer
* @sk_rcvbuf: size of receive buffer in bytes
* @sk_wq: sock wait queue and async head
+ * @sk_rx_dst: receive input route used by early demux
* @sk_dst_cache: destination cache
* @sk_dst_lock: destination cache lock
* @sk_policy: flow policy
- * @sk_rmem_alloc: receive queue bytes committed
* @sk_receive_queue: incoming packets
* @sk_wmem_alloc: transmit queue bytes committed
* @sk_write_queue: Packet sending queue
@@ -171,15 +235,21 @@ struct sock_common {
* @sk_omem_alloc: "o" is "option" or "other"
* @sk_wmem_queued: persistent queue size
* @sk_forward_alloc: space allocated forward
+ * @sk_napi_id: id of the last napi context to receive data for sk
+ * @sk_ll_usec: usecs to busypoll when there is no data
* @sk_allocation: allocation mode
+ * @sk_pacing_rate: Pacing rate (if supported by transport/packet scheduler)
+ * @sk_max_pacing_rate: Maximum pacing rate (%SO_MAX_PACING_RATE)
* @sk_sndbuf: size of send buffer in bytes
* @sk_flags: %SO_LINGER (l_onoff), %SO_BROADCAST, %SO_KEEPALIVE,
* %SO_OOBINLINE settings, %SO_TIMESTAMPING settings
- * @sk_no_check: %SO_NO_CHECK setting, wether or not checkup packets
+ * @sk_no_check_tx: %SO_NO_CHECK setting, set checksum in TX packets
+ * @sk_no_check_rx: allow zero checksum in RX packets
* @sk_route_caps: route capabilities (e.g. %NETIF_F_TSO)
* @sk_route_nocaps: forbidden route capabilities (e.g NETIF_F_GSO_MASK)
* @sk_gso_type: GSO type (e.g. %SKB_GSO_TCPV4)
* @sk_gso_max_size: Maximum GSO segment size to build
+ * @sk_gso_max_segs: Maximum number of GSO segments
* @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
@@ -193,6 +263,7 @@ struct sock_common {
* @sk_ack_backlog: current listen backlog
* @sk_max_ack_backlog: listen backlog set in listen()
* @sk_priority: %SO_PRIORITY setting
+ * @sk_cgrp_prioidx: socket group's priority map index
* @sk_type: socket type (%SOCK_STREAM, etc)
* @sk_protocol: which protocol this socket belongs in this network family
* @sk_peer_pid: &struct pid for this socket's peer
@@ -207,12 +278,13 @@ struct sock_common {
* @sk_stamp: time stamp of last packet received
* @sk_socket: Identd and reporting IO signals
* @sk_user_data: RPC layer private data
- * @sk_sndmsg_page: cached page for sendmsg
- * @sk_sndmsg_off: cached offset for sendmsg
+ * @sk_frag: cached page frag
+ * @sk_peek_off: current peek_offset value
* @sk_send_head: front of stuff to transmit
* @sk_security: used by security modules
* @sk_mark: generic packet mark
* @sk_classid: this socket's cgroup classid
+ * @sk_cgrp: this socket's cgroup-specific proto data
* @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
@@ -232,15 +304,26 @@ struct sock {
#define sk_refcnt __sk_common.skc_refcnt
#define sk_tx_queue_mapping __sk_common.skc_tx_queue_mapping
-#define sk_copy_start __sk_common.skc_hash
+#define sk_dontcopy_begin __sk_common.skc_dontcopy_begin
+#define sk_dontcopy_end __sk_common.skc_dontcopy_end
#define sk_hash __sk_common.skc_hash
+#define sk_portpair __sk_common.skc_portpair
+#define sk_num __sk_common.skc_num
+#define sk_dport __sk_common.skc_dport
+#define sk_addrpair __sk_common.skc_addrpair
+#define sk_daddr __sk_common.skc_daddr
+#define sk_rcv_saddr __sk_common.skc_rcv_saddr
#define sk_family __sk_common.skc_family
#define sk_state __sk_common.skc_state
#define sk_reuse __sk_common.skc_reuse
+#define sk_reuseport __sk_common.skc_reuseport
#define sk_bound_dev_if __sk_common.skc_bound_dev_if
#define sk_bind_node __sk_common.skc_bind_node
#define sk_prot __sk_common.skc_prot
#define sk_net __sk_common.skc_net
+#define sk_v6_daddr __sk_common.skc_v6_daddr
+#define sk_v6_rcv_saddr __sk_common.skc_v6_rcv_saddr
+
socket_lock_t sk_lock;
struct sk_buff_head sk_receive_queue;
/*
@@ -262,11 +345,15 @@ struct sock {
#ifdef CONFIG_RPS
__u32 sk_rxhash;
#endif
+#ifdef CONFIG_NET_RX_BUSY_POLL
+ unsigned int sk_napi_id;
+ unsigned int sk_ll_usec;
+#endif
atomic_t sk_drops;
int sk_rcvbuf;
struct sk_filter __rcu *sk_filter;
- struct socket_wq *sk_wq;
+ struct socket_wq __rcu *sk_wq;
#ifdef CONFIG_NET_DMA
struct sk_buff_head sk_async_wait_queue;
@@ -276,7 +363,8 @@ struct sock {
struct xfrm_policy *sk_policy[2];
#endif
unsigned long sk_flags;
- struct dst_entry *sk_dst_cache;
+ struct dst_entry *sk_rx_dst;
+ struct dst_entry __rcu *sk_dst_cache;
spinlock_t sk_dst_lock;
atomic_t sk_wmem_alloc;
atomic_t sk_omem_alloc;
@@ -284,17 +372,21 @@ struct sock {
struct sk_buff_head sk_write_queue;
kmemcheck_bitfield_begin(flags);
unsigned int sk_shutdown : 2,
- sk_no_check : 2,
+ sk_no_check_tx : 1,
+ sk_no_check_rx : 1,
sk_userlocks : 4,
sk_protocol : 8,
sk_type : 16;
kmemcheck_bitfield_end(flags);
int sk_wmem_queued;
gfp_t sk_allocation;
- int sk_route_caps;
- int sk_route_nocaps;
+ u32 sk_pacing_rate; /* bytes per second */
+ u32 sk_max_pacing_rate;
+ netdev_features_t sk_route_caps;
+ netdev_features_t sk_route_nocaps;
int sk_gso_type;
unsigned int sk_gso_max_size;
+ u16 sk_gso_max_segs;
int sk_rcvlowat;
unsigned long sk_lingertime;
struct sk_buff_head sk_error_queue;
@@ -305,6 +397,9 @@ struct sock {
unsigned short sk_ack_backlog;
unsigned short sk_max_ack_backlog;
__u32 sk_priority;
+#if IS_ENABLED(CONFIG_CGROUP_NET_PRIO)
+ __u32 sk_cgrp_prioidx;
+#endif
struct pid *sk_peer_pid;
const struct cred *sk_peer_cred;
long sk_rcvtimeo;
@@ -314,24 +409,65 @@ struct sock {
ktime_t sk_stamp;
struct socket *sk_socket;
void *sk_user_data;
- struct page *sk_sndmsg_page;
+ struct page_frag sk_frag;
struct sk_buff *sk_send_head;
- __u32 sk_sndmsg_off;
+ __s32 sk_peek_off;
int sk_write_pending;
#ifdef CONFIG_SECURITY
void *sk_security;
#endif
__u32 sk_mark;
u32 sk_classid;
+ struct cg_proto *sk_cgrp;
void (*sk_state_change)(struct sock *sk);
- void (*sk_data_ready)(struct sock *sk, int bytes);
+ void (*sk_data_ready)(struct sock *sk);
void (*sk_write_space)(struct sock *sk);
void (*sk_error_report)(struct sock *sk);
- int (*sk_backlog_rcv)(struct sock *sk,
- struct sk_buff *skb);
+ int (*sk_backlog_rcv)(struct sock *sk,
+ struct sk_buff *skb);
void (*sk_destruct)(struct sock *sk);
};
+#define __sk_user_data(sk) ((*((void __rcu **)&(sk)->sk_user_data)))
+
+#define rcu_dereference_sk_user_data(sk) rcu_dereference(__sk_user_data((sk)))
+#define rcu_assign_sk_user_data(sk, ptr) rcu_assign_pointer(__sk_user_data((sk)), ptr)
+
+/*
+ * SK_CAN_REUSE and SK_NO_REUSE on a socket mean that the socket is OK
+ * or not whether his port will be reused by someone else. SK_FORCE_REUSE
+ * on a socket means that the socket will reuse everybody else's port
+ * without looking at the other's sk_reuse value.
+ */
+
+#define SK_NO_REUSE 0
+#define SK_CAN_REUSE 1
+#define SK_FORCE_REUSE 2
+
+static inline int sk_peek_offset(struct sock *sk, int flags)
+{
+ if ((flags & MSG_PEEK) && (sk->sk_peek_off >= 0))
+ return sk->sk_peek_off;
+ else
+ return 0;
+}
+
+static inline void sk_peek_offset_bwd(struct sock *sk, int val)
+{
+ if (sk->sk_peek_off >= 0) {
+ if (sk->sk_peek_off >= val)
+ sk->sk_peek_off -= val;
+ else
+ sk->sk_peek_off = 0;
+ }
+}
+
+static inline void sk_peek_offset_fwd(struct sock *sk, int val)
+{
+ if (sk->sk_peek_off >= 0)
+ sk->sk_peek_off += val;
+}
+
/*
* Hashed lists helper routines
*/
@@ -374,40 +510,40 @@ static inline struct sock *sk_nulls_next(const struct sock *sk)
NULL;
}
-static inline int sk_unhashed(const struct sock *sk)
+static inline bool sk_unhashed(const struct sock *sk)
{
return hlist_unhashed(&sk->sk_node);
}
-static inline int sk_hashed(const struct sock *sk)
+static inline bool sk_hashed(const struct sock *sk)
{
return !sk_unhashed(sk);
}
-static __inline__ void sk_node_init(struct hlist_node *node)
+static inline void sk_node_init(struct hlist_node *node)
{
node->pprev = NULL;
}
-static __inline__ void sk_nulls_node_init(struct hlist_nulls_node *node)
+static inline void sk_nulls_node_init(struct hlist_nulls_node *node)
{
node->pprev = NULL;
}
-static __inline__ void __sk_del_node(struct sock *sk)
+static inline void __sk_del_node(struct sock *sk)
{
__hlist_del(&sk->sk_node);
}
/* NB: equivalent to hlist_del_init_rcu */
-static __inline__ int __sk_del_node_init(struct sock *sk)
+static inline bool __sk_del_node_init(struct sock *sk)
{
if (sk_hashed(sk)) {
__sk_del_node(sk);
sk_node_init(&sk->sk_node);
- return 1;
+ return true;
}
- return 0;
+ return false;
}
/* Grab socket reference count. This operation is valid only
@@ -429,9 +565,9 @@ static inline void __sock_put(struct sock *sk)
atomic_dec(&sk->sk_refcnt);
}
-static __inline__ int sk_del_node_init(struct sock *sk)
+static inline bool sk_del_node_init(struct sock *sk)
{
- int rc = __sk_del_node_init(sk);
+ bool rc = __sk_del_node_init(sk);
if (rc) {
/* paranoid for a while -acme */
@@ -442,18 +578,18 @@ static __inline__ int sk_del_node_init(struct sock *sk)
}
#define sk_del_node_init_rcu(sk) sk_del_node_init(sk)
-static __inline__ int __sk_nulls_del_node_init_rcu(struct sock *sk)
+static inline bool __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 true;
}
- return 0;
+ return false;
}
-static __inline__ int sk_nulls_del_node_init_rcu(struct sock *sk)
+static inline bool sk_nulls_del_node_init_rcu(struct sock *sk)
{
- int rc = __sk_nulls_del_node_init_rcu(sk);
+ bool rc = __sk_nulls_del_node_init_rcu(sk);
if (rc) {
/* paranoid for a while -acme */
@@ -463,63 +599,71 @@ static __inline__ int sk_nulls_del_node_init_rcu(struct sock *sk)
return rc;
}
-static __inline__ void __sk_add_node(struct sock *sk, struct hlist_head *list)
+static inline void __sk_add_node(struct sock *sk, struct hlist_head *list)
{
hlist_add_head(&sk->sk_node, list);
}
-static __inline__ void sk_add_node(struct sock *sk, struct hlist_head *list)
+static inline void sk_add_node(struct sock *sk, struct hlist_head *list)
{
sock_hold(sk);
__sk_add_node(sk, list);
}
-static __inline__ void sk_add_node_rcu(struct sock *sk, struct hlist_head *list)
+static inline void sk_add_node_rcu(struct sock *sk, struct hlist_head *list)
{
sock_hold(sk);
hlist_add_head_rcu(&sk->sk_node, list);
}
-static __inline__ void __sk_nulls_add_node_rcu(struct sock *sk, struct hlist_nulls_head *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)
+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)
+static inline void __sk_del_bind_node(struct sock *sk)
{
__hlist_del(&sk->sk_bind_node);
}
-static __inline__ void sk_add_bind_node(struct sock *sk,
+static inline void sk_add_bind_node(struct sock *sk,
struct hlist_head *list)
{
hlist_add_head(&sk->sk_bind_node, list);
}
-#define sk_for_each(__sk, node, list) \
- hlist_for_each_entry(__sk, node, list, sk_node)
-#define sk_for_each_rcu(__sk, node, list) \
- hlist_for_each_entry_rcu(__sk, node, list, sk_node)
+#define sk_for_each(__sk, list) \
+ hlist_for_each_entry(__sk, list, sk_node)
+#define sk_for_each_rcu(__sk, list) \
+ hlist_for_each_entry_rcu(__sk, 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_for_each_from(__sk) \
+ hlist_for_each_entry_from(__sk, 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_safe(__sk, node, tmp, list) \
- hlist_for_each_entry_safe(__sk, node, tmp, list, sk_node)
-#define sk_for_each_bound(__sk, node, list) \
- hlist_for_each_entry(__sk, node, list, sk_bind_node)
+#define sk_for_each_safe(__sk, tmp, list) \
+ hlist_for_each_entry_safe(__sk, tmp, list, sk_node)
+#define sk_for_each_bound(__sk, list) \
+ hlist_for_each_entry(__sk, list, sk_bind_node)
+
+static inline struct user_namespace *sk_user_ns(struct sock *sk)
+{
+ /* Careful only use this in a context where these parameters
+ * can not change and must all be valid, such as recvmsg from
+ * userspace.
+ */
+ return sk->sk_socket->file->f_cred->user_ns;
+}
/* Sock flags */
enum sock_flags {
@@ -538,6 +682,7 @@ enum sock_flags {
SOCK_RCVTSTAMPNS, /* %SO_TIMESTAMPNS setting */
SOCK_LOCALROUTE, /* route locally only, %SO_DONTROUTE setting */
SOCK_QUEUE_SHRUNK, /* write queue has been shrunk recently */
+ SOCK_MEMALLOC, /* VM depends on this socket for swapping */
SOCK_TIMESTAMPING_TX_HARDWARE, /* %SOF_TIMESTAMPING_TX_HARDWARE */
SOCK_TIMESTAMPING_TX_SOFTWARE, /* %SOF_TIMESTAMPING_TX_SOFTWARE */
SOCK_TIMESTAMPING_RX_HARDWARE, /* %SOF_TIMESTAMPING_RX_HARDWARE */
@@ -547,6 +692,14 @@ enum sock_flags {
SOCK_TIMESTAMPING_SYS_HARDWARE, /* %SOF_TIMESTAMPING_SYS_HARDWARE */
SOCK_FASYNC, /* fasync() active */
SOCK_RXQ_OVFL,
+ SOCK_ZEROCOPY, /* buffers from userspace */
+ SOCK_WIFI_STATUS, /* push wifi status to userspace */
+ SOCK_NOFCS, /* Tell NIC not to do the Ethernet FCS.
+ * Will use last 4 bytes of packet sent from
+ * user-space instead.
+ */
+ SOCK_FILTER_LOCKED, /* Filter cannot be changed anymore */
+ SOCK_SELECT_ERR_QUEUE, /* Wake select on error queue */
};
static inline void sock_copy_flags(struct sock *nsk, struct sock *osk)
@@ -564,11 +717,31 @@ static inline void sock_reset_flag(struct sock *sk, enum sock_flags flag)
__clear_bit(flag, &sk->sk_flags);
}
-static inline int sock_flag(struct sock *sk, enum sock_flags flag)
+static inline bool sock_flag(const struct sock *sk, enum sock_flags flag)
{
return test_bit(flag, &sk->sk_flags);
}
+#ifdef CONFIG_NET
+extern struct static_key memalloc_socks;
+static inline int sk_memalloc_socks(void)
+{
+ return static_key_false(&memalloc_socks);
+}
+#else
+
+static inline int sk_memalloc_socks(void)
+{
+ return 0;
+}
+
+#endif
+
+static inline gfp_t sk_gfp_atomic(struct sock *sk, gfp_t gfp_mask)
+{
+ return GFP_ATOMIC | (sk->sk_allocation & __GFP_MEMALLOC);
+}
+
static inline void sk_acceptq_removed(struct sock *sk)
{
sk->sk_ack_backlog--;
@@ -579,7 +752,7 @@ static inline void sk_acceptq_added(struct sock *sk)
sk->sk_ack_backlog++;
}
-static inline int sk_acceptq_is_full(struct sock *sk)
+static inline bool sk_acceptq_is_full(const struct sock *sk)
{
return sk->sk_ack_backlog > sk->sk_max_ack_backlog;
}
@@ -587,22 +760,17 @@ static inline int sk_acceptq_is_full(struct sock *sk)
/*
* Compute minimal free write space needed to queue new packets.
*/
-static inline int sk_stream_min_wspace(struct sock *sk)
+static inline int sk_stream_min_wspace(const struct sock *sk)
{
return sk->sk_wmem_queued >> 1;
}
-static inline int sk_stream_wspace(struct sock *sk)
+static inline int sk_stream_wspace(const struct sock *sk)
{
return sk->sk_sndbuf - sk->sk_wmem_queued;
}
-extern void sk_stream_write_space(struct sock *sk);
-
-static inline int sk_stream_memory_free(struct sock *sk)
-{
- return sk->sk_wmem_queued < sk->sk_sndbuf;
-}
+void sk_stream_write_space(struct sock *sk);
/* OOB backlog add */
static inline void __sk_add_backlog(struct sock *sk, struct sk_buff *skb)
@@ -621,18 +789,22 @@ static inline void __sk_add_backlog(struct sock *sk, struct sk_buff *skb)
/*
* Take into account size of receive queue and backlog queue
+ * Do not take into account this skb truesize,
+ * to allow even a single big packet to come.
*/
-static inline bool sk_rcvqueues_full(const struct sock *sk, const struct sk_buff *skb)
+static inline bool sk_rcvqueues_full(const struct sock *sk, const struct sk_buff *skb,
+ unsigned int limit)
{
unsigned int qsize = sk->sk_backlog.len + atomic_read(&sk->sk_rmem_alloc);
- return qsize + skb->truesize > sk->sk_rcvbuf;
+ return qsize > limit;
}
/* The per-socket spinlock must be held here. */
-static inline __must_check int sk_add_backlog(struct sock *sk, struct sk_buff *skb)
+static inline __must_check int sk_add_backlog(struct sock *sk, struct sk_buff *skb,
+ unsigned int limit)
{
- if (sk_rcvqueues_full(sk, skb))
+ if (sk_rcvqueues_full(sk, skb, limit))
return -ENOBUFS;
__sk_add_backlog(sk, skb);
@@ -640,45 +812,73 @@ static inline __must_check int sk_add_backlog(struct sock *sk, struct sk_buff *s
return 0;
}
+int __sk_backlog_rcv(struct sock *sk, struct sk_buff *skb);
+
static inline int sk_backlog_rcv(struct sock *sk, struct sk_buff *skb)
{
+ if (sk_memalloc_socks() && skb_pfmemalloc(skb))
+ return __sk_backlog_rcv(sk, skb);
+
return sk->sk_backlog_rcv(sk, skb);
}
-static inline void sock_rps_record_flow(const struct sock *sk)
+static inline void sock_rps_record_flow_hash(__u32 hash)
{
#ifdef CONFIG_RPS
struct rps_sock_flow_table *sock_flow_table;
rcu_read_lock();
sock_flow_table = rcu_dereference(rps_sock_flow_table);
- rps_record_sock_flow(sock_flow_table, sk->sk_rxhash);
+ rps_record_sock_flow(sock_flow_table, hash);
rcu_read_unlock();
#endif
}
-static inline void sock_rps_reset_flow(const struct sock *sk)
+static inline void sock_rps_reset_flow_hash(__u32 hash)
{
#ifdef CONFIG_RPS
struct rps_sock_flow_table *sock_flow_table;
rcu_read_lock();
sock_flow_table = rcu_dereference(rps_sock_flow_table);
- rps_reset_sock_flow(sock_flow_table, sk->sk_rxhash);
+ rps_reset_sock_flow(sock_flow_table, hash);
rcu_read_unlock();
#endif
}
-static inline void sock_rps_save_rxhash(struct sock *sk, u32 rxhash)
+static inline void sock_rps_record_flow(const struct sock *sk)
+{
+#ifdef CONFIG_RPS
+ sock_rps_record_flow_hash(sk->sk_rxhash);
+#endif
+}
+
+static inline void sock_rps_reset_flow(const struct sock *sk)
+{
+#ifdef CONFIG_RPS
+ sock_rps_reset_flow_hash(sk->sk_rxhash);
+#endif
+}
+
+static inline void sock_rps_save_rxhash(struct sock *sk,
+ const struct sk_buff *skb)
{
#ifdef CONFIG_RPS
- if (unlikely(sk->sk_rxhash != rxhash)) {
+ if (unlikely(sk->sk_rxhash != skb->hash)) {
sock_rps_reset_flow(sk);
- sk->sk_rxhash = rxhash;
+ sk->sk_rxhash = skb->hash;
}
#endif
}
+static inline void sock_rps_reset_rxhash(struct sock *sk)
+{
+#ifdef CONFIG_RPS
+ sock_rps_reset_flow(sk);
+ sk->sk_rxhash = 0;
+#endif
+}
+
#define sk_wait_event(__sk, __timeo, __condition) \
({ int __rc; \
release_sock(__sk); \
@@ -691,44 +891,59 @@ static inline void sock_rps_save_rxhash(struct sock *sk, u32 rxhash)
__rc; \
})
-extern int sk_stream_wait_connect(struct sock *sk, long *timeo_p);
-extern int sk_stream_wait_memory(struct sock *sk, long *timeo_p);
-extern void sk_stream_wait_close(struct sock *sk, long timeo_p);
-extern int sk_stream_error(struct sock *sk, int flags, int err);
-extern void sk_stream_kill_queues(struct sock *sk);
+int sk_stream_wait_connect(struct sock *sk, long *timeo_p);
+int sk_stream_wait_memory(struct sock *sk, long *timeo_p);
+void sk_stream_wait_close(struct sock *sk, long timeo_p);
+int sk_stream_error(struct sock *sk, int flags, int err);
+void sk_stream_kill_queues(struct sock *sk);
+void sk_set_memalloc(struct sock *sk);
+void sk_clear_memalloc(struct sock *sk);
-extern int sk_wait_data(struct sock *sk, long *timeo);
+int sk_wait_data(struct sock *sk, long *timeo);
struct request_sock_ops;
struct timewait_sock_ops;
struct inet_hashinfo;
struct raw_hashinfo;
+struct module;
+
+/*
+ * caches using SLAB_DESTROY_BY_RCU should let .next pointer from nulls nodes
+ * un-modified. Special care is taken when initializing object to zero.
+ */
+static inline void sk_prot_clear_nulls(struct sock *sk, int size)
+{
+ if (offsetof(struct sock, sk_node.next) != 0)
+ memset(sk, 0, offsetof(struct sock, sk_node.next));
+ memset(&sk->sk_node.pprev, 0,
+ size - offsetof(struct sock, sk_node.pprev));
+}
/* Networking protocol blocks we attach to sockets.
* socket layer -> transport layer interface
* transport -> network interface is defined by struct inet_proto
*/
struct proto {
- void (*close)(struct sock *sk,
+ void (*close)(struct sock *sk,
long timeout);
int (*connect)(struct sock *sk,
- struct sockaddr *uaddr,
+ struct sockaddr *uaddr,
int addr_len);
int (*disconnect)(struct sock *sk, int flags);
- struct sock * (*accept) (struct sock *sk, int flags, int *err);
+ struct sock * (*accept)(struct sock *sk, int flags, int *err);
int (*ioctl)(struct sock *sk, int cmd,
unsigned long arg);
int (*init)(struct sock *sk);
void (*destroy)(struct sock *sk);
void (*shutdown)(struct sock *sk, int how);
- int (*setsockopt)(struct sock *sk, int level,
+ int (*setsockopt)(struct sock *sk, int level,
int optname, char __user *optval,
unsigned int optlen);
- int (*getsockopt)(struct sock *sk, int level,
- int optname, char __user *optval,
- int __user *option);
+ 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,
@@ -738,32 +953,39 @@ struct proto {
int level,
int optname, char __user *optval,
int __user *option);
+ int (*compat_ioctl)(struct sock *sk,
+ unsigned int cmd, unsigned long arg);
#endif
int (*sendmsg)(struct kiocb *iocb, struct sock *sk,
struct msghdr *msg, size_t len);
int (*recvmsg)(struct kiocb *iocb, struct sock *sk,
struct msghdr *msg,
- size_t len, int noblock, int flags,
- int *addr_len);
+ size_t len, int noblock, int flags,
+ int *addr_len);
int (*sendpage)(struct sock *sk, struct page *page,
int offset, size_t size, int flags);
- int (*bind)(struct sock *sk,
+ int (*bind)(struct sock *sk,
struct sockaddr *uaddr, int addr_len);
- int (*backlog_rcv) (struct sock *sk,
+ int (*backlog_rcv) (struct sock *sk,
struct sk_buff *skb);
+ void (*release_cb)(struct sock *sk);
+ void (*mtu_reduced)(struct sock *sk);
+
/* Keeping track of sk's, looking them up, and port selection methods. */
void (*hash)(struct sock *sk);
void (*unhash)(struct sock *sk);
void (*rehash)(struct sock *sk);
int (*get_port)(struct sock *sk, unsigned short snum);
+ void (*clear_sk)(struct sock *sk, int size);
/* Keeping track of sockets in use */
#ifdef CONFIG_PROC_FS
unsigned int inuse_idx;
#endif
+ bool (*stream_memory_free)(const struct sock *sk);
/* Memory pressure */
void (*enter_memory_pressure)(struct sock *sk);
atomic_long_t *memory_allocated; /* Current allocated memory. */
@@ -804,10 +1026,60 @@ struct proto {
#ifdef SOCK_REFCNT_DEBUG
atomic_t socks;
#endif
+#ifdef CONFIG_MEMCG_KMEM
+ /*
+ * cgroup specific init/deinit functions. Called once for all
+ * protocols that implement it, from cgroups populate function.
+ * This function has to setup any files the protocol want to
+ * appear in the kmem cgroup filesystem.
+ */
+ int (*init_cgroup)(struct mem_cgroup *memcg,
+ struct cgroup_subsys *ss);
+ void (*destroy_cgroup)(struct mem_cgroup *memcg);
+ struct cg_proto *(*proto_cgroup)(struct mem_cgroup *memcg);
+#endif
+};
+
+/*
+ * Bits in struct cg_proto.flags
+ */
+enum cg_proto_flags {
+ /* Currently active and new sockets should be assigned to cgroups */
+ MEMCG_SOCK_ACTIVE,
+ /* It was ever activated; we must disarm static keys on destruction */
+ MEMCG_SOCK_ACTIVATED,
+};
+
+struct cg_proto {
+ struct res_counter memory_allocated; /* Current allocated memory. */
+ struct percpu_counter sockets_allocated; /* Current number of sockets. */
+ int memory_pressure;
+ long sysctl_mem[3];
+ unsigned long flags;
+ /*
+ * memcg field is used to find which memcg we belong directly
+ * Each memcg struct can hold more than one cg_proto, so container_of
+ * won't really cut.
+ *
+ * The elegant solution would be having an inverse function to
+ * proto_cgroup in struct proto, but that means polluting the structure
+ * for everybody, instead of just for memcg users.
+ */
+ struct mem_cgroup *memcg;
};
-extern int proto_register(struct proto *prot, int alloc_slab);
-extern void proto_unregister(struct proto *prot);
+int proto_register(struct proto *prot, int alloc_slab);
+void proto_unregister(struct proto *prot);
+
+static inline bool memcg_proto_active(struct cg_proto *cg_proto)
+{
+ return test_bit(MEMCG_SOCK_ACTIVE, &cg_proto->flags);
+}
+
+static inline bool memcg_proto_activated(struct cg_proto *cg_proto)
+{
+ return test_bit(MEMCG_SOCK_ACTIVATED, &cg_proto->flags);
+}
#ifdef SOCK_REFCNT_DEBUG
static inline void sk_refcnt_debug_inc(struct sock *sk)
@@ -834,13 +1106,227 @@ static inline void sk_refcnt_debug_release(const struct sock *sk)
#define sk_refcnt_debug_release(sk) do { } while (0)
#endif /* SOCK_REFCNT_DEBUG */
+#if defined(CONFIG_MEMCG_KMEM) && defined(CONFIG_NET)
+extern struct static_key memcg_socket_limit_enabled;
+static inline struct cg_proto *parent_cg_proto(struct proto *proto,
+ struct cg_proto *cg_proto)
+{
+ return proto->proto_cgroup(parent_mem_cgroup(cg_proto->memcg));
+}
+#define mem_cgroup_sockets_enabled static_key_false(&memcg_socket_limit_enabled)
+#else
+#define mem_cgroup_sockets_enabled 0
+static inline struct cg_proto *parent_cg_proto(struct proto *proto,
+ struct cg_proto *cg_proto)
+{
+ return NULL;
+}
+#endif
+
+static inline bool sk_stream_memory_free(const struct sock *sk)
+{
+ if (sk->sk_wmem_queued >= sk->sk_sndbuf)
+ return false;
+
+ return sk->sk_prot->stream_memory_free ?
+ sk->sk_prot->stream_memory_free(sk) : true;
+}
+
+static inline bool sk_stream_is_writeable(const struct sock *sk)
+{
+ return sk_stream_wspace(sk) >= sk_stream_min_wspace(sk) &&
+ sk_stream_memory_free(sk);
+}
+
+
+static inline bool sk_has_memory_pressure(const struct sock *sk)
+{
+ return sk->sk_prot->memory_pressure != NULL;
+}
+
+static inline bool sk_under_memory_pressure(const struct sock *sk)
+{
+ if (!sk->sk_prot->memory_pressure)
+ return false;
+
+ if (mem_cgroup_sockets_enabled && sk->sk_cgrp)
+ return !!sk->sk_cgrp->memory_pressure;
+
+ return !!*sk->sk_prot->memory_pressure;
+}
+
+static inline void sk_leave_memory_pressure(struct sock *sk)
+{
+ int *memory_pressure = sk->sk_prot->memory_pressure;
+
+ if (!memory_pressure)
+ return;
+
+ if (*memory_pressure)
+ *memory_pressure = 0;
+
+ if (mem_cgroup_sockets_enabled && sk->sk_cgrp) {
+ struct cg_proto *cg_proto = sk->sk_cgrp;
+ struct proto *prot = sk->sk_prot;
+
+ for (; cg_proto; cg_proto = parent_cg_proto(prot, cg_proto))
+ cg_proto->memory_pressure = 0;
+ }
+
+}
+
+static inline void sk_enter_memory_pressure(struct sock *sk)
+{
+ if (!sk->sk_prot->enter_memory_pressure)
+ return;
+
+ if (mem_cgroup_sockets_enabled && sk->sk_cgrp) {
+ struct cg_proto *cg_proto = sk->sk_cgrp;
+ struct proto *prot = sk->sk_prot;
+
+ for (; cg_proto; cg_proto = parent_cg_proto(prot, cg_proto))
+ cg_proto->memory_pressure = 1;
+ }
+
+ sk->sk_prot->enter_memory_pressure(sk);
+}
+
+static inline long sk_prot_mem_limits(const struct sock *sk, int index)
+{
+ long *prot = sk->sk_prot->sysctl_mem;
+ if (mem_cgroup_sockets_enabled && sk->sk_cgrp)
+ prot = sk->sk_cgrp->sysctl_mem;
+ return prot[index];
+}
+
+static inline void memcg_memory_allocated_add(struct cg_proto *prot,
+ unsigned long amt,
+ int *parent_status)
+{
+ struct res_counter *fail;
+ int ret;
+
+ ret = res_counter_charge_nofail(&prot->memory_allocated,
+ amt << PAGE_SHIFT, &fail);
+ if (ret < 0)
+ *parent_status = OVER_LIMIT;
+}
+
+static inline void memcg_memory_allocated_sub(struct cg_proto *prot,
+ unsigned long amt)
+{
+ res_counter_uncharge(&prot->memory_allocated, amt << PAGE_SHIFT);
+}
+
+static inline u64 memcg_memory_allocated_read(struct cg_proto *prot)
+{
+ u64 ret;
+ ret = res_counter_read_u64(&prot->memory_allocated, RES_USAGE);
+ return ret >> PAGE_SHIFT;
+}
+
+static inline long
+sk_memory_allocated(const struct sock *sk)
+{
+ struct proto *prot = sk->sk_prot;
+ if (mem_cgroup_sockets_enabled && sk->sk_cgrp)
+ return memcg_memory_allocated_read(sk->sk_cgrp);
+
+ return atomic_long_read(prot->memory_allocated);
+}
+
+static inline long
+sk_memory_allocated_add(struct sock *sk, int amt, int *parent_status)
+{
+ struct proto *prot = sk->sk_prot;
+
+ if (mem_cgroup_sockets_enabled && sk->sk_cgrp) {
+ memcg_memory_allocated_add(sk->sk_cgrp, amt, parent_status);
+ /* update the root cgroup regardless */
+ atomic_long_add_return(amt, prot->memory_allocated);
+ return memcg_memory_allocated_read(sk->sk_cgrp);
+ }
+
+ return atomic_long_add_return(amt, prot->memory_allocated);
+}
+
+static inline void
+sk_memory_allocated_sub(struct sock *sk, int amt)
+{
+ struct proto *prot = sk->sk_prot;
+
+ if (mem_cgroup_sockets_enabled && sk->sk_cgrp)
+ memcg_memory_allocated_sub(sk->sk_cgrp, amt);
+
+ atomic_long_sub(amt, prot->memory_allocated);
+}
+
+static inline void sk_sockets_allocated_dec(struct sock *sk)
+{
+ struct proto *prot = sk->sk_prot;
+
+ if (mem_cgroup_sockets_enabled && sk->sk_cgrp) {
+ struct cg_proto *cg_proto = sk->sk_cgrp;
+
+ for (; cg_proto; cg_proto = parent_cg_proto(prot, cg_proto))
+ percpu_counter_dec(&cg_proto->sockets_allocated);
+ }
+
+ percpu_counter_dec(prot->sockets_allocated);
+}
+
+static inline void sk_sockets_allocated_inc(struct sock *sk)
+{
+ struct proto *prot = sk->sk_prot;
+
+ if (mem_cgroup_sockets_enabled && sk->sk_cgrp) {
+ struct cg_proto *cg_proto = sk->sk_cgrp;
+
+ for (; cg_proto; cg_proto = parent_cg_proto(prot, cg_proto))
+ percpu_counter_inc(&cg_proto->sockets_allocated);
+ }
+
+ percpu_counter_inc(prot->sockets_allocated);
+}
+
+static inline int
+sk_sockets_allocated_read_positive(struct sock *sk)
+{
+ struct proto *prot = sk->sk_prot;
+
+ if (mem_cgroup_sockets_enabled && sk->sk_cgrp)
+ return percpu_counter_read_positive(&sk->sk_cgrp->sockets_allocated);
+
+ return percpu_counter_read_positive(prot->sockets_allocated);
+}
+
+static inline int
+proto_sockets_allocated_sum_positive(struct proto *prot)
+{
+ return percpu_counter_sum_positive(prot->sockets_allocated);
+}
+
+static inline long
+proto_memory_allocated(struct proto *prot)
+{
+ return atomic_long_read(prot->memory_allocated);
+}
+
+static inline bool
+proto_memory_pressure(struct proto *prot)
+{
+ if (!prot->memory_pressure)
+ return false;
+ return !!*prot->memory_pressure;
+}
+
#ifdef CONFIG_PROC_FS
/* Called with local bh disabled */
-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);
+void sock_prot_inuse_add(struct net *net, struct proto *prot, int inc);
+int sock_prot_inuse_get(struct net *net, struct proto *proto);
#else
-static void inline sock_prot_inuse_add(struct net *net, struct proto *prot,
+static inline void sock_prot_inuse_add(struct net *net, struct proto *prot,
int inc)
{
}
@@ -856,6 +1342,8 @@ static inline void __sk_prot_rehash(struct sock *sk)
sk->sk_prot->hash(sk);
}
+void sk_prot_clear_portaddr_nulls(struct sock *sk, int size);
+
/* About 10 seconds */
#define SOCK_DESTROY_TIME (10*HZ)
@@ -912,8 +1400,8 @@ static inline struct inode *SOCK_INODE(struct socket *socket)
/*
* Functions for memory accounting
*/
-extern int __sk_mem_schedule(struct sock *sk, int size, int kind);
-extern void __sk_mem_reclaim(struct sock *sk);
+int __sk_mem_schedule(struct sock *sk, int size, int kind);
+void __sk_mem_reclaim(struct sock *sk);
#define SK_MEM_QUANTUM ((int)PAGE_SIZE)
#define SK_MEM_QUANTUM_SHIFT ilog2(SK_MEM_QUANTUM)
@@ -925,26 +1413,28 @@ static inline int sk_mem_pages(int amt)
return (amt + SK_MEM_QUANTUM - 1) >> SK_MEM_QUANTUM_SHIFT;
}
-static inline int sk_has_account(struct sock *sk)
+static inline bool sk_has_account(struct sock *sk)
{
/* return true if protocol supports memory accounting */
return !!sk->sk_prot->memory_allocated;
}
-static inline int sk_wmem_schedule(struct sock *sk, int size)
+static inline bool sk_wmem_schedule(struct sock *sk, int size)
{
if (!sk_has_account(sk))
- return 1;
+ return true;
return size <= sk->sk_forward_alloc ||
__sk_mem_schedule(sk, size, SK_MEM_SEND);
}
-static inline int sk_rmem_schedule(struct sock *sk, int size)
+static inline bool
+sk_rmem_schedule(struct sock *sk, struct sk_buff *skb, int size)
{
if (!sk_has_account(sk))
- return 1;
- return size <= sk->sk_forward_alloc ||
- __sk_mem_schedule(sk, size, SK_MEM_RECV);
+ return true;
+ return size<= sk->sk_forward_alloc ||
+ __sk_mem_schedule(sk, size, SK_MEM_RECV) ||
+ skb_pfmemalloc(skb);
}
static inline void sk_mem_reclaim(struct sock *sk)
@@ -1000,6 +1490,11 @@ static inline void sk_wmem_free_skb(struct sock *sk, struct sk_buff *skb)
*/
#define sock_owned_by_user(sk) ((sk)->sk_lock.owned)
+static inline void sock_release_ownership(struct sock *sk)
+{
+ sk->sk_lock.owned = 0;
+}
+
/*
* Macro so as to not evaluate some arguments when
* lockdep is not enabled.
@@ -1007,7 +1502,7 @@ static inline void sk_wmem_free_skb(struct sock *sk, struct sk_buff *skb)
* Mark both the sk_lock and the sk_lock.slock as a
* per-address-family lock class.
*/
-#define sock_lock_init_class_and_name(sk, sname, skey, name, key) \
+#define sock_lock_init_class_and_name(sk, sname, skey, name, key) \
do { \
sk->sk_lock.owned = 0; \
init_waitqueue_head(&sk->sk_lock.wq); \
@@ -1015,18 +1510,18 @@ do { \
debug_check_no_locks_freed((void *)&(sk)->sk_lock, \
sizeof((sk)->sk_lock)); \
lockdep_set_class_and_name(&(sk)->sk_lock.slock, \
- (skey), (sname)); \
+ (skey), (sname)); \
lockdep_init_map(&(sk)->sk_lock.dep_map, (name), (key), 0); \
} while (0)
-extern void lock_sock_nested(struct sock *sk, int subclass);
+void lock_sock_nested(struct sock *sk, int subclass);
static inline void lock_sock(struct sock *sk)
{
lock_sock_nested(sk, 0);
}
-extern void release_sock(struct sock *sk);
+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))
@@ -1035,7 +1530,7 @@ extern void release_sock(struct sock *sk);
SINGLE_DEPTH_NESTING)
#define bh_unlock_sock(__sk) spin_unlock(&((__sk)->sk_lock.slock))
-extern bool lock_sock_fast(struct sock *sk);
+bool lock_sock_fast(struct sock *sk);
/**
* unlock_sock_fast - complement of lock_sock_fast
* @sk: socket
@@ -1053,138 +1548,80 @@ static inline void unlock_sock_fast(struct sock *sk, bool slow)
}
-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);
-
-extern struct sk_buff *sock_wmalloc(struct sock *sk,
- unsigned long size, int force,
- gfp_t priority);
-extern struct sk_buff *sock_rmalloc(struct sock *sk,
- unsigned long size, int force,
- gfp_t priority);
-extern void sock_wfree(struct sk_buff *skb);
-extern void sock_rfree(struct sk_buff *skb);
-
-extern int sock_setsockopt(struct socket *sock, int level,
- int op, char __user *optval,
- unsigned int optlen);
-
-extern int sock_getsockopt(struct socket *sock, int level,
- int op, char __user *optval,
- int __user *optlen);
-extern struct sk_buff *sock_alloc_send_skb(struct sock *sk,
- 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 sk_send_sigurg(struct sock *sk);
-
-#ifdef CONFIG_CGROUPS
-extern void sock_update_classid(struct sock *sk);
-#else
-static inline void sock_update_classid(struct sock *sk)
-{
-}
-#endif
+struct sock *sk_alloc(struct net *net, int family, gfp_t priority,
+ struct proto *prot);
+void sk_free(struct sock *sk);
+void sk_release_kernel(struct sock *sk);
+struct sock *sk_clone_lock(const struct sock *sk, const gfp_t priority);
+
+struct sk_buff *sock_wmalloc(struct sock *sk, unsigned long size, int force,
+ gfp_t priority);
+void sock_wfree(struct sk_buff *skb);
+void skb_orphan_partial(struct sk_buff *skb);
+void sock_rfree(struct sk_buff *skb);
+void sock_edemux(struct sk_buff *skb);
+
+int sock_setsockopt(struct socket *sock, int level, int op,
+ char __user *optval, unsigned int optlen);
+
+int sock_getsockopt(struct socket *sock, int level, int op,
+ char __user *optval, int __user *optlen);
+struct sk_buff *sock_alloc_send_skb(struct sock *sk, unsigned long size,
+ int noblock, int *errcode);
+struct sk_buff *sock_alloc_send_pskb(struct sock *sk, unsigned long header_len,
+ unsigned long data_len, int noblock,
+ int *errcode, int max_page_order);
+void *sock_kmalloc(struct sock *sk, int size, gfp_t priority);
+void sock_kfree_s(struct sock *sk, void *mem, int size);
+void sk_send_sigurg(struct sock *sk);
/*
* Functions to fill in entries in struct proto_ops when a protocol
* does not implement a particular function.
*/
-extern int sock_no_bind(struct socket *,
- struct sockaddr *, int);
-extern int sock_no_connect(struct socket *,
- struct sockaddr *, int, int);
-extern int sock_no_socketpair(struct socket *,
- struct socket *);
-extern int sock_no_accept(struct socket *,
- struct socket *, int);
-extern int sock_no_getname(struct socket *,
- struct sockaddr *, int *, int);
-extern unsigned int sock_no_poll(struct file *, struct socket *,
- struct poll_table_struct *);
-extern int sock_no_ioctl(struct socket *, unsigned int,
- unsigned long);
-extern int sock_no_listen(struct socket *, int);
-extern int sock_no_shutdown(struct socket *, int);
-extern int sock_no_getsockopt(struct socket *, int , int,
- char __user *, int __user *);
-extern int sock_no_setsockopt(struct socket *, int, int,
- char __user *, unsigned int);
-extern int sock_no_sendmsg(struct kiocb *, struct socket *,
- struct msghdr *, size_t);
-extern int sock_no_recvmsg(struct kiocb *, struct socket *,
- struct msghdr *, size_t, int);
-extern int sock_no_mmap(struct file *file,
- struct socket *sock,
- struct vm_area_struct *vma);
-extern ssize_t sock_no_sendpage(struct socket *sock,
- struct page *page,
- int offset, size_t size,
- int flags);
+int sock_no_bind(struct socket *, struct sockaddr *, int);
+int sock_no_connect(struct socket *, struct sockaddr *, int, int);
+int sock_no_socketpair(struct socket *, struct socket *);
+int sock_no_accept(struct socket *, struct socket *, int);
+int sock_no_getname(struct socket *, struct sockaddr *, int *, int);
+unsigned int sock_no_poll(struct file *, struct socket *,
+ struct poll_table_struct *);
+int sock_no_ioctl(struct socket *, unsigned int, unsigned long);
+int sock_no_listen(struct socket *, int);
+int sock_no_shutdown(struct socket *, int);
+int sock_no_getsockopt(struct socket *, int , int, char __user *, int __user *);
+int sock_no_setsockopt(struct socket *, int, int, char __user *, unsigned int);
+int sock_no_sendmsg(struct kiocb *, struct socket *, struct msghdr *, size_t);
+int sock_no_recvmsg(struct kiocb *, struct socket *, struct msghdr *, size_t,
+ int);
+int sock_no_mmap(struct file *file, struct socket *sock,
+ struct vm_area_struct *vma);
+ssize_t sock_no_sendpage(struct socket *sock, struct page *page, int offset,
+ size_t size, int flags);
/*
* Functions to fill in entries in struct proto_ops when a protocol
* uses the inet style.
*/
-extern int sock_common_getsockopt(struct socket *sock, int level, int optname,
+int sock_common_getsockopt(struct socket *sock, int level, int optname,
char __user *optval, int __user *optlen);
-extern int sock_common_recvmsg(struct kiocb *iocb, struct socket *sock,
+int sock_common_recvmsg(struct kiocb *iocb, struct socket *sock,
struct msghdr *msg, size_t size, int flags);
-extern int sock_common_setsockopt(struct socket *sock, int level, int optname,
+int sock_common_setsockopt(struct socket *sock, int level, int optname,
char __user *optval, unsigned int optlen);
-extern int compat_sock_common_getsockopt(struct socket *sock, int level,
+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 compat_sock_common_setsockopt(struct socket *sock, int level,
int optname, char __user *optval, unsigned int optlen);
-extern void sk_common_release(struct sock *sk);
+void sk_common_release(struct sock *sk);
/*
* Default socket callbacks and setup code
*/
-
-/* Initialise core socket variables */
-extern void sock_init_data(struct socket *sock, struct sock *sk);
-
-/**
- * sk_filter_release - release a socket filter
- * @fp: filter to remove
- *
- * Remove a filter from a socket and release its resources.
- */
-
-static inline void sk_filter_release(struct sk_filter *fp)
-{
- if (atomic_dec_and_test(&fp->refcnt))
- kfree(fp);
-}
-
-static inline void sk_filter_uncharge(struct sock *sk, struct sk_filter *fp)
-{
- unsigned int size = sk_filter_len(fp);
-
- atomic_sub(size, &sk->sk_omem_alloc);
- sk_filter_release(fp);
-}
-static inline void sk_filter_charge(struct sock *sk, struct sk_filter *fp)
-{
- atomic_inc(&fp->refcnt);
- atomic_add(sk_filter_len(fp), &sk->sk_omem_alloc);
-}
+/* Initialise core socket variables */
+void sock_init_data(struct socket *sock, struct sock *sk);
/*
* Socket reference counting postulates.
@@ -1217,9 +1654,12 @@ static inline void sock_put(struct sock *sk)
if (atomic_dec_and_test(&sk->sk_refcnt))
sk_free(sk);
}
+/* Generic version of sock_put(), dealing with all sockets
+ * (TCP_TIMEWAIT, ESTABLISHED...)
+ */
+void sock_gen_put(struct sock *sk);
-extern int sk_receive_skb(struct sock *sk, struct sk_buff *skb,
- const int nested);
+int sk_receive_skb(struct sock *sk, struct sk_buff *skb, const int nested);
static inline void sk_tx_queue_set(struct sock *sk, int tx_queue)
{
@@ -1244,7 +1684,8 @@ static inline void sk_set_socket(struct sock *sk, struct socket *sock)
static inline wait_queue_head_t *sk_sleep(struct sock *sk)
{
- return &sk->sk_wq->wait;
+ BUILD_BUG_ON(offsetof(struct socket_wq, wait) != 0);
+ return &rcu_dereference_raw(sk->sk_wq)->wait;
}
/* Detach socket from process context.
* Announce socket dead, detach it from wait queue and inode.
@@ -1265,21 +1706,20 @@ static inline void sock_orphan(struct sock *sk)
static inline void sock_graft(struct sock *sk, struct socket *parent)
{
write_lock_bh(&sk->sk_callback_lock);
- rcu_assign_pointer(sk->sk_wq, parent->wq);
+ sk->sk_wq = parent->wq;
parent->sk = sk;
sk_set_socket(sk, parent);
security_sock_graft(sk, parent);
write_unlock_bh(&sk->sk_callback_lock);
}
-extern int sock_i_uid(struct sock *sk);
-extern unsigned long sock_i_ino(struct sock *sk);
+kuid_t sock_i_uid(struct sock *sk);
+unsigned long sock_i_ino(struct sock *sk);
static inline struct dst_entry *
__sk_dst_get(struct sock *sk)
{
- return rcu_dereference_check(sk->sk_dst_cache, rcu_read_lock_held() ||
- sock_owned_by_user(sk) ||
+ return rcu_dereference_check(sk->sk_dst_cache, sock_owned_by_user(sk) ||
lockdep_is_held(&sk->sk_lock.slock));
}
@@ -1290,14 +1730,12 @@ sk_dst_get(struct sock *sk)
rcu_read_lock();
dst = rcu_dereference(sk->sk_dst_cache);
- if (dst)
- dst_hold(dst);
+ if (dst && !atomic_inc_not_zero(&dst->__refcnt))
+ dst = NULL;
rcu_read_unlock();
return dst;
}
-extern void sk_reset_txq(struct sock *sk);
-
static inline void dst_negative_advice(struct sock *sk)
{
struct dst_entry *ndst, *dst = __sk_dst_get(sk);
@@ -1307,7 +1745,7 @@ static inline void dst_negative_advice(struct sock *sk)
if (ndst != dst) {
rcu_assign_pointer(sk->sk_dst_cache, ndst);
- sk_reset_txq(sk);
+ sk_tx_queue_clear(sk);
}
}
}
@@ -1330,9 +1768,11 @@ __sk_dst_set(struct sock *sk, struct dst_entry *dst)
static inline void
sk_dst_set(struct sock *sk, struct dst_entry *dst)
{
- spin_lock(&sk->sk_dst_lock);
- __sk_dst_set(sk, dst);
- spin_unlock(&sk->sk_dst_lock);
+ struct dst_entry *old_dst;
+
+ sk_tx_queue_clear(sk);
+ old_dst = xchg((__force struct dst_entry **)&sk->sk_dst_cache, dst);
+ dst_release(old_dst);
}
static inline void
@@ -1344,28 +1784,79 @@ __sk_dst_reset(struct sock *sk)
static inline void
sk_dst_reset(struct sock *sk)
{
- spin_lock(&sk->sk_dst_lock);
- __sk_dst_reset(sk);
- spin_unlock(&sk->sk_dst_lock);
+ sk_dst_set(sk, NULL);
}
-extern struct dst_entry *__sk_dst_check(struct sock *sk, u32 cookie);
+struct dst_entry *__sk_dst_check(struct sock *sk, u32 cookie);
-extern struct dst_entry *sk_dst_check(struct sock *sk, u32 cookie);
+struct dst_entry *sk_dst_check(struct sock *sk, u32 cookie);
-static inline int sk_can_gso(const struct sock *sk)
+static inline bool sk_can_gso(const struct sock *sk)
{
return net_gso_ok(sk->sk_route_caps, sk->sk_gso_type);
}
-extern void sk_setup_caps(struct sock *sk, struct dst_entry *dst);
+void sk_setup_caps(struct sock *sk, struct dst_entry *dst);
-static inline void sk_nocaps_add(struct sock *sk, int flags)
+static inline void sk_nocaps_add(struct sock *sk, netdev_features_t flags)
{
sk->sk_route_nocaps |= flags;
sk->sk_route_caps &= ~flags;
}
+static inline int skb_do_copy_data_nocache(struct sock *sk, struct sk_buff *skb,
+ char __user *from, char *to,
+ int copy, int offset)
+{
+ if (skb->ip_summed == CHECKSUM_NONE) {
+ int err = 0;
+ __wsum csum = csum_and_copy_from_user(from, to, copy, 0, &err);
+ if (err)
+ return err;
+ skb->csum = csum_block_add(skb->csum, csum, offset);
+ } else if (sk->sk_route_caps & NETIF_F_NOCACHE_COPY) {
+ if (!access_ok(VERIFY_READ, from, copy) ||
+ __copy_from_user_nocache(to, from, copy))
+ return -EFAULT;
+ } else if (copy_from_user(to, from, copy))
+ return -EFAULT;
+
+ return 0;
+}
+
+static inline int skb_add_data_nocache(struct sock *sk, struct sk_buff *skb,
+ char __user *from, int copy)
+{
+ int err, offset = skb->len;
+
+ err = skb_do_copy_data_nocache(sk, skb, from, skb_put(skb, copy),
+ copy, offset);
+ if (err)
+ __skb_trim(skb, offset);
+
+ return err;
+}
+
+static inline int skb_copy_to_page_nocache(struct sock *sk, char __user *from,
+ struct sk_buff *skb,
+ struct page *page,
+ int off, int copy)
+{
+ int err;
+
+ err = skb_do_copy_data_nocache(sk, skb, from, page_address(page) + off,
+ copy, skb->len);
+ if (err)
+ return err;
+
+ skb->len += copy;
+ skb->data_len += copy;
+ skb->truesize += copy;
+ sk->sk_wmem_queued += copy;
+ sk_mem_charge(sk, copy);
+ return 0;
+}
+
static inline int skb_copy_to_page(struct sock *sk, char __user *from,
struct sk_buff *skb, struct page *page,
int off, int copy)
@@ -1417,7 +1908,7 @@ static inline int sk_rmem_alloc_get(const struct sock *sk)
*
* Returns true if socket has write or read allocations
*/
-static inline int sk_has_allocations(const struct sock *sk)
+static inline bool sk_has_allocations(const struct sock *sk)
{
return sk_wmem_alloc_get(sk) || sk_rmem_alloc_get(sk);
}
@@ -1456,9 +1947,7 @@ static inline int sk_has_allocations(const struct sock *sk)
*/
static inline bool wq_has_sleeper(struct socket_wq *wq)
{
-
- /*
- * We need to be sure we are in sync with the
+ /* We need to be sure we are in sync with the
* add_wait_queue modifications to the wait queue.
*
* This memory barrier is paired in the sock_poll_wait.
@@ -1478,24 +1967,23 @@ static inline bool wq_has_sleeper(struct socket_wq *wq)
static inline void sock_poll_wait(struct file *filp,
wait_queue_head_t *wait_address, poll_table *p)
{
- if (p && wait_address) {
+ if (!poll_does_not_wait(p) && wait_address) {
poll_wait(filp, wait_address, p);
- /*
- * We need to be sure we are in sync with the
+ /* We need to be sure we are in sync with the
* socket flags modification.
*
* This memory barrier is paired in the wq_has_sleeper.
- */
+ */
smp_mb();
}
}
/*
- * Queue a received datagram if it will fit. Stream and sequenced
+ * Queue a received datagram if it will fit. Stream and sequenced
* protocols can't normally use this as they need to fit buffers in
* and play with them.
*
- * Inlined as it's very short and called for pretty much every
+ * Inlined as it's very short and called for pretty much every
* packet ever received.
*/
@@ -1521,19 +2009,19 @@ static inline void skb_set_owner_r(struct sk_buff *skb, struct sock *sk)
sk_mem_charge(sk, skb->truesize);
}
-extern void sk_reset_timer(struct sock *sk, struct timer_list* timer,
- unsigned long expires);
+void sk_reset_timer(struct sock *sk, struct timer_list *timer,
+ unsigned long expires);
-extern void sk_stop_timer(struct sock *sk, struct timer_list* timer);
+void sk_stop_timer(struct sock *sk, struct timer_list *timer);
-extern int sock_queue_rcv_skb(struct sock *sk, struct sk_buff *skb);
+int sock_queue_rcv_skb(struct sock *sk, struct sk_buff *skb);
-extern int sock_queue_err_skb(struct sock *sk, struct sk_buff *skb);
+int sock_queue_err_skb(struct sock *sk, struct sk_buff *skb);
/*
* Recover an error report and clear atomically
*/
-
+
static inline int sock_error(struct sock *sk)
{
int err;
@@ -1549,7 +2037,7 @@ static inline unsigned long sock_wspace(struct sock *sk)
if (!(sk->sk_shutdown & SEND_SHUTDOWN)) {
amt = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc);
- if (amt < 0)
+ if (amt < 0)
amt = 0;
}
return amt;
@@ -1561,39 +2049,47 @@ static inline void sk_wake_async(struct sock *sk, int how, int band)
sock_wake_async(sk->sk_socket, how, band);
}
-#define SOCK_MIN_SNDBUF 2048
-/*
- * Since sk_rmem_alloc sums skb->truesize, even a small frame might need
- * sizeof(sk_buff) + MTU + padding, unless net driver perform copybreak
+/* Since sk_{r,w}mem_alloc sums skb->truesize, even a small frame might
+ * need sizeof(sk_buff) + MTU + padding, unless net driver perform copybreak.
+ * Note: for send buffers, TCP works better if we can build two skbs at
+ * minimum.
*/
-#define SOCK_MIN_RCVBUF (2048 + sizeof(struct sk_buff))
+#define TCP_SKB_MIN_TRUESIZE (2048 + SKB_DATA_ALIGN(sizeof(struct sk_buff)))
+
+#define SOCK_MIN_SNDBUF (TCP_SKB_MIN_TRUESIZE * 2)
+#define SOCK_MIN_RCVBUF TCP_SKB_MIN_TRUESIZE
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 >> 1);
- sk->sk_sndbuf = max(sk->sk_sndbuf, SOCK_MIN_SNDBUF);
+ sk->sk_sndbuf = max_t(u32, sk->sk_sndbuf, SOCK_MIN_SNDBUF);
}
}
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)
+/**
+ * sk_page_frag - return an appropriate page_frag
+ * @sk: socket
+ *
+ * If socket allocation mode allows current thread to sleep, it means its
+ * safe to use the per task page_frag instead of the per socket one.
+ */
+static inline struct page_frag *sk_page_frag(struct sock *sk)
{
- struct page *page = NULL;
+ if (sk->sk_allocation & __GFP_WAIT)
+ return &current->task_frag;
- page = alloc_pages(sk->sk_allocation, 0);
- if (!page) {
- sk->sk_prot->enter_memory_pressure(sk);
- sk_stream_moderate_sndbuf(sk);
- }
- return page;
+ return &sk->sk_frag;
}
+bool sk_page_frag_refill(struct sock *sk, struct page_frag *pfrag);
+
/*
* Default write policy as shown to user space via poll/select/SIGIO
*/
-static inline int sock_writeable(const struct sock *sk)
+static inline bool sock_writeable(const struct sock *sk)
{
return atomic_read(&sk->sk_wmem_alloc) < (sk->sk_sndbuf >> 1);
}
@@ -1603,12 +2099,12 @@ static inline gfp_t gfp_any(void)
return in_softirq() ? GFP_ATOMIC : GFP_KERNEL;
}
-static inline long sock_rcvtimeo(const struct sock *sk, int noblock)
+static inline long sock_rcvtimeo(const struct sock *sk, bool noblock)
{
return noblock ? 0 : sk->sk_rcvtimeo;
}
-static inline long sock_sndtimeo(const struct sock *sk, int noblock)
+static inline long sock_sndtimeo(const struct sock *sk, bool noblock)
{
return noblock ? 0 : sk->sk_sndtimeo;
}
@@ -1626,10 +2122,12 @@ static inline int sock_intr_errno(long timeo)
return timeo == MAX_SCHEDULE_TIMEOUT ? -ERESTARTSYS : -EINTR;
}
-extern void __sock_recv_timestamp(struct msghdr *msg, struct sock *sk,
- struct sk_buff *skb);
+void __sock_recv_timestamp(struct msghdr *msg, struct sock *sk,
+ struct sk_buff *skb);
+void __sock_recv_wifi_status(struct msghdr *msg, struct sock *sk,
+ struct sk_buff *skb);
-static __inline__ void
+static inline void
sock_recv_timestamp(struct msghdr *msg, struct sock *sk, struct sk_buff *skb)
{
ktime_t kt = skb->tstamp;
@@ -1655,19 +2153,21 @@ sock_recv_timestamp(struct msghdr *msg, struct sock *sk, struct sk_buff *skb)
__sock_recv_timestamp(msg, sk, skb);
else
sk->sk_stamp = kt;
+
+ if (sock_flag(sk, SOCK_WIFI_STATUS) && skb->wifi_acked_valid)
+ __sock_recv_wifi_status(msg, sk, skb);
}
-extern void __sock_recv_ts_and_drops(struct msghdr *msg, struct sock *sk,
- struct sk_buff *skb);
+void __sock_recv_ts_and_drops(struct msghdr *msg, struct sock *sk,
+ struct sk_buff *skb);
static inline void sock_recv_ts_and_drops(struct msghdr *msg, struct sock *sk,
struct sk_buff *skb)
{
#define FLAGS_TS_OR_DROPS ((1UL << SOCK_RXQ_OVFL) | \
(1UL << SOCK_RCVTSTAMP) | \
- (1UL << SOCK_TIMESTAMPING_RX_SOFTWARE) | \
(1UL << SOCK_TIMESTAMPING_SOFTWARE) | \
- (1UL << SOCK_TIMESTAMPING_RAW_HARDWARE) | \
+ (1UL << SOCK_TIMESTAMPING_RAW_HARDWARE) | \
(1UL << SOCK_TIMESTAMPING_SYS_HARDWARE))
if (sk->sk_flags & FLAGS_TS_OR_DROPS)
@@ -1681,10 +2181,9 @@ static inline void sock_recv_ts_and_drops(struct msghdr *msg, struct sock *sk,
* @sk: socket sending this packet
* @tx_flags: filled with instructions for time stamping
*
- * Currently only depends on SOCK_TIMESTAMPING* flags. Returns error code if
- * parameters are invalid.
+ * Currently only depends on SOCK_TIMESTAMPING* flags.
*/
-extern int sock_tx_timestamp(struct sock *sk, __u8 *tx_flags);
+void sock_tx_timestamp(struct sock *sk, __u8 *tx_flags);
/**
* sk_eat_skb - Release a skb if it is no longer needed
@@ -1696,7 +2195,7 @@ extern int sock_tx_timestamp(struct sock *sk, __u8 *tx_flags);
* locked so that the sk_buff queue operation is ok.
*/
#ifdef CONFIG_NET_DMA
-static inline void sk_eat_skb(struct sock *sk, struct sk_buff *skb, int copied_early)
+static inline void sk_eat_skb(struct sock *sk, struct sk_buff *skb, bool copied_early)
{
__skb_unlink(skb, &sk->sk_receive_queue);
if (!copied_early)
@@ -1705,7 +2204,7 @@ static inline void sk_eat_skb(struct sock *sk, struct sk_buff *skb, int copied_e
__skb_queue_tail(&sk->sk_async_wait_queue, skb);
}
#else
-static inline void sk_eat_skb(struct sock *sk, struct sk_buff *skb, int copied_early)
+static inline void sk_eat_skb(struct sock *sk, struct sk_buff *skb, bool copied_early)
{
__skb_unlink(skb, &sk->sk_receive_queue);
__kfree_skb(skb);
@@ -1726,19 +2225,23 @@ void sock_net_set(struct sock *sk, struct net *net)
/*
* 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
+ * They should not hold a reference 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));
+ struct net *current_net = sock_net(sk);
+
+ if (!net_eq(current_net, net)) {
+ put_net(current_net);
+ sock_net_set(sk, hold_net(net));
+ }
}
static inline struct sock *skb_steal_sock(struct sk_buff *skb)
{
- if (unlikely(skb->sk)) {
+ if (skb->sk) {
struct sock *sk = skb->sk;
skb->destructor = NULL;
@@ -1748,12 +2251,19 @@ static inline struct sock *skb_steal_sock(struct sk_buff *skb)
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 *);
+void sock_enable_timestamp(struct sock *sk, int flag);
+int sock_get_timestamp(struct sock *, struct timeval __user *);
+int sock_get_timestampns(struct sock *, struct timespec __user *);
+int sock_recv_errqueue(struct sock *sk, struct msghdr *msg, int len, int level,
+ int type);
+
+bool sk_ns_capable(const struct sock *sk,
+ struct user_namespace *user_ns, int cap);
+bool sk_capable(const struct sock *sk, int cap);
+bool sk_net_capable(const struct sock *sk, int cap);
-/*
- * Enable debug/info messages
+/*
+ * Enable debug/info messages
*/
extern int net_msg_warn;
#define NETDEBUG(fmt, args...) \
@@ -1765,8 +2275,6 @@ extern int net_msg_warn;
extern __u32 sysctl_wmem_max;
extern __u32 sysctl_rmem_max;
-extern void sk_init(void);
-
extern int sysctl_optmem_max;
extern __u32 sysctl_wmem_default;
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-04 13:25:17 +0000