Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) /* SPDX-License-Identifier: GPL-2.0-or-later */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * NET		Generic infrastructure for Network protocols.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  *		Definitions for request_sock
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  * Authors:	Arnaldo Carvalho de Melo <acme@conectiva.com.br>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9)  * 		From code originally in include/net/tcp.h
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #ifndef _REQUEST_SOCK_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #define _REQUEST_SOCK_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include <linux/spinlock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #include <linux/bug.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #include <linux/refcount.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) #include <net/sock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) struct request_sock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) struct sk_buff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) struct dst_entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) struct proto;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) struct request_sock_ops {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 	int		family;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 	unsigned int	obj_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 	struct kmem_cache	*slab;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 	char		*slab_name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 	int		(*rtx_syn_ack)(const struct sock *sk,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 				       struct request_sock *req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 	void		(*send_ack)(const struct sock *sk, struct sk_buff *skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 				    struct request_sock *req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 	void		(*send_reset)(const struct sock *sk,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 				      struct sk_buff *skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 	void		(*destructor)(struct request_sock *req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 	void		(*syn_ack_timeout)(const struct request_sock *req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) int inet_rtx_syn_ack(const struct sock *parent, struct request_sock *req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) struct saved_syn {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 	u32 mac_hdrlen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 	u32 network_hdrlen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	u32 tcp_hdrlen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 	u8 data[];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) /* struct request_sock - mini sock to represent a connection request
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) struct request_sock {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	struct sock_common		__req_common;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) #define rsk_refcnt			__req_common.skc_refcnt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) #define rsk_hash			__req_common.skc_hash
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) #define rsk_listener			__req_common.skc_listener
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) #define rsk_window_clamp		__req_common.skc_window_clamp
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) #define rsk_rcv_wnd			__req_common.skc_rcv_wnd
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 	struct request_sock		*dl_next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 	u16				mss;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 	u8				num_retrans; /* number of retransmits */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 	u8				syncookie:1; /* syncookie: encode tcpopts in timestamp */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	u8				num_timeout:7; /* number of timeouts */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 	u32				ts_recent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 	struct timer_list		rsk_timer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 	const struct request_sock_ops	*rsk_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 	struct sock			*sk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 	struct saved_syn		*saved_syn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 	u32				secid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 	u32				peer_secid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) static inline struct request_sock *inet_reqsk(const struct sock *sk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 	return (struct request_sock *)sk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) static inline struct sock *req_to_sk(struct request_sock *req)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 	return (struct sock *)req;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) static inline struct request_sock *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) reqsk_alloc(const struct request_sock_ops *ops, struct sock *sk_listener,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 	    bool attach_listener)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 	struct request_sock *req;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 	req = kmem_cache_alloc(ops->slab, GFP_ATOMIC | __GFP_NOWARN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 	if (!req)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 		return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 	req->rsk_listener = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 	if (attach_listener) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 		if (unlikely(!refcount_inc_not_zero(&sk_listener->sk_refcnt))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 			kmem_cache_free(ops->slab, req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 			return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 		req->rsk_listener = sk_listener;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 	req->rsk_ops = ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	req_to_sk(req)->sk_prot = sk_listener->sk_prot;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 	sk_node_init(&req_to_sk(req)->sk_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 	sk_tx_queue_clear(req_to_sk(req));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 	req->saved_syn = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	req->num_timeout = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	req->num_retrans = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 	req->sk = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	refcount_set(&req->rsk_refcnt, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 	return req;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) static inline void __reqsk_free(struct request_sock *req)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 	req->rsk_ops->destructor(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 	if (req->rsk_listener)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 		sock_put(req->rsk_listener);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 	kfree(req->saved_syn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 	kmem_cache_free(req->rsk_ops->slab, req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) static inline void reqsk_free(struct request_sock *req)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 	WARN_ON_ONCE(refcount_read(&req->rsk_refcnt) != 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 	__reqsk_free(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) static inline void reqsk_put(struct request_sock *req)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 	if (refcount_dec_and_test(&req->rsk_refcnt))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 		reqsk_free(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137)  * For a TCP Fast Open listener -
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138)  *	lock - protects the access to all the reqsk, which is co-owned by
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139)  *		the listener and the child socket.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140)  *	qlen - pending TFO requests (still in TCP_SYN_RECV).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141)  *	max_qlen - max TFO reqs allowed before TFO is disabled.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143)  *	XXX (TFO) - ideally these fields can be made as part of "listen_sock"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144)  *	structure above. But there is some implementation difficulty due to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145)  *	listen_sock being part of request_sock_queue hence will be freed when
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146)  *	a listener is stopped. But TFO related fields may continue to be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147)  *	accessed even after a listener is closed, until its sk_refcnt drops
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148)  *	to 0 implying no more outstanding TFO reqs. One solution is to keep
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149)  *	listen_opt around until	sk_refcnt drops to 0. But there is some other
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150)  *	complexity that needs to be resolved. E.g., a listener can be disabled
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151)  *	temporarily through shutdown()->tcp_disconnect(), and re-enabled later.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) struct fastopen_queue {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 	struct request_sock	*rskq_rst_head; /* Keep track of past TFO */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 	struct request_sock	*rskq_rst_tail; /* requests that caused RST.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 						 * This is part of the defense
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 						 * against spoofing attack.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 						 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 	spinlock_t	lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	int		qlen;		/* # of pending (TCP_SYN_RECV) reqs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 	int		max_qlen;	/* != 0 iff TFO is currently enabled */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 	struct tcp_fastopen_context __rcu *ctx; /* cipher context for cookie */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) /** struct request_sock_queue - queue of request_socks
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168)  * @rskq_accept_head - FIFO head of established children
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169)  * @rskq_accept_tail - FIFO tail of established children
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170)  * @rskq_defer_accept - User waits for some data after accept()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) struct request_sock_queue {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 	spinlock_t		rskq_lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 	u8			rskq_defer_accept;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 	u32			synflood_warned;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 	atomic_t		qlen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 	atomic_t		young;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 	struct request_sock	*rskq_accept_head;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 	struct request_sock	*rskq_accept_tail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 	struct fastopen_queue	fastopenq;  /* Check max_qlen != 0 to determine
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 					     * if TFO is enabled.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 					     */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) void reqsk_queue_alloc(struct request_sock_queue *queue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) void reqsk_fastopen_remove(struct sock *sk, struct request_sock *req,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 			   bool reset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) static inline bool reqsk_queue_empty(const struct request_sock_queue *queue)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 	return READ_ONCE(queue->rskq_accept_head) == NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) static inline struct request_sock *reqsk_queue_remove(struct request_sock_queue *queue,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 						      struct sock *parent)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 	struct request_sock *req;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 	spin_lock_bh(&queue->rskq_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 	req = queue->rskq_accept_head;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 	if (req) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 		sk_acceptq_removed(parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 		WRITE_ONCE(queue->rskq_accept_head, req->dl_next);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 		if (queue->rskq_accept_head == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 			queue->rskq_accept_tail = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 	spin_unlock_bh(&queue->rskq_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 	return req;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) static inline void reqsk_queue_removed(struct request_sock_queue *queue,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 				       const struct request_sock *req)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 	if (req->num_timeout == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 		atomic_dec(&queue->young);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 	atomic_dec(&queue->qlen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) static inline void reqsk_queue_added(struct request_sock_queue *queue)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 	atomic_inc(&queue->young);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 	atomic_inc(&queue->qlen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) static inline int reqsk_queue_len(const struct request_sock_queue *queue)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 	return atomic_read(&queue->qlen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) static inline int reqsk_queue_len_young(const struct request_sock_queue *queue)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 	return atomic_read(&queue->young);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) #endif /* _REQUEST_SOCK_H */