Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
55aa4f58 | 2 | * linux/include/linux/sunrpc/xprt.h |
1da177e4 LT |
3 | * |
4 | * Declarations for the RPC transport interface. | |
5 | * | |
6 | * Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de> | |
7 | */ | |
8 | ||
9 | #ifndef _LINUX_SUNRPC_XPRT_H | |
10 | #define _LINUX_SUNRPC_XPRT_H | |
11 | ||
12 | #include <linux/uio.h> | |
13 | #include <linux/socket.h> | |
14 | #include <linux/in.h> | |
ff839970 | 15 | #include <linux/ktime.h> |
30c5116b | 16 | #include <linux/kref.h> |
1da177e4 LT |
17 | #include <linux/sunrpc/sched.h> |
18 | #include <linux/sunrpc/xdr.h> | |
7adae489 | 19 | #include <linux/sunrpc/msg_prot.h> |
1da177e4 | 20 | |
96802a09 FM |
21 | #ifdef __KERNEL__ |
22 | ||
1da177e4 LT |
23 | #define RPC_MIN_SLOT_TABLE (2U) |
24 | #define RPC_DEF_SLOT_TABLE (16U) | |
d9ba131d | 25 | #define RPC_MAX_SLOT_TABLE_LIMIT (65536U) |
88338124 | 26 | #define RPC_MAX_SLOT_TABLE RPC_MAX_SLOT_TABLE_LIMIT |
1da177e4 | 27 | |
4f4cf5ad CL |
28 | #define RPC_CWNDSHIFT (8U) |
29 | #define RPC_CWNDSCALE (1U << RPC_CWNDSHIFT) | |
30 | #define RPC_INITCWND RPC_CWNDSCALE | |
31 | #define RPC_MAXCWND(xprt) ((xprt)->max_reqs << RPC_CWNDSHIFT) | |
32 | #define RPCXPRT_CONGESTED(xprt) ((xprt)->cong >= (xprt)->cwnd) | |
33 | ||
1da177e4 LT |
34 | /* |
35 | * This describes a timeout strategy | |
36 | */ | |
37 | struct rpc_timeout { | |
38 | unsigned long to_initval, /* initial timeout */ | |
39 | to_maxval, /* max timeout */ | |
40 | to_increment; /* if !exponential */ | |
41 | unsigned int to_retries; /* max # of retries */ | |
42 | unsigned char to_exponential; | |
43 | }; | |
44 | ||
edb267a6 CL |
45 | enum rpc_display_format_t { |
46 | RPC_DISPLAY_ADDR = 0, | |
47 | RPC_DISPLAY_PORT, | |
48 | RPC_DISPLAY_PROTO, | |
fbfe3cc6 CL |
49 | RPC_DISPLAY_HEX_ADDR, |
50 | RPC_DISPLAY_HEX_PORT, | |
4417c8c4 | 51 | RPC_DISPLAY_NETID, |
edb267a6 CL |
52 | RPC_DISPLAY_MAX, |
53 | }; | |
54 | ||
529b33c6 CL |
55 | struct rpc_task; |
56 | struct rpc_xprt; | |
e99170ff | 57 | struct seq_file; |
76566773 CL |
58 | struct svc_serv; |
59 | struct net; | |
529b33c6 | 60 | |
1da177e4 LT |
61 | /* |
62 | * This describes a complete RPC request | |
63 | */ | |
64 | struct rpc_rqst { | |
65 | /* | |
66 | * This is the user-visible part | |
67 | */ | |
68 | struct rpc_xprt * rq_xprt; /* RPC client */ | |
69 | struct xdr_buf rq_snd_buf; /* send buffer */ | |
70 | struct xdr_buf rq_rcv_buf; /* recv buffer */ | |
71 | ||
72 | /* | |
73 | * This is the private part | |
74 | */ | |
75 | struct rpc_task * rq_task; /* RPC task data */ | |
a17c2153 | 76 | struct rpc_cred * rq_cred; /* Bound cred */ |
d8ed029d | 77 | __be32 rq_xid; /* request XID */ |
1da177e4 | 78 | int rq_cong; /* has incremented xprt->cong */ |
1da177e4 | 79 | u32 rq_seqno; /* gss seq no. used on req. */ |
ead5e1c2 BF |
80 | int rq_enc_pages_num; |
81 | struct page **rq_enc_pages; /* scratch pages for use by | |
82 | gss privacy code */ | |
83 | void (*rq_release_snd_buf)(struct rpc_rqst *); /* release rq_enc_pages */ | |
1da177e4 LT |
84 | struct list_head rq_list; |
85 | ||
02107148 | 86 | __u32 * rq_buffer; /* XDR encode buffer */ |
c977a2ef | 87 | size_t rq_callsize, |
2bea90d4 | 88 | rq_rcvsize; |
d60dbb20 TM |
89 | size_t rq_xmit_bytes_sent; /* total bytes sent */ |
90 | size_t rq_reply_bytes_recvd; /* total reply bytes */ | |
91 | /* received */ | |
02107148 | 92 | |
1da177e4 LT |
93 | struct xdr_buf rq_private_buf; /* The receive buffer |
94 | * used in the softirq. | |
95 | */ | |
96 | unsigned long rq_majortimeo; /* major timeout alarm */ | |
97 | unsigned long rq_timeout; /* Current timeout value */ | |
d60dbb20 | 98 | ktime_t rq_rtt; /* round-trip time */ |
1da177e4 | 99 | unsigned int rq_retries; /* # of retries */ |
7c1d71cf TM |
100 | unsigned int rq_connect_cookie; |
101 | /* A cookie used to track the | |
102 | state of the transport | |
103 | connection */ | |
1da177e4 LT |
104 | |
105 | /* | |
106 | * Partial send handling | |
107 | */ | |
1da177e4 LT |
108 | u32 rq_bytes_sent; /* Bytes we have sent */ |
109 | ||
ff839970 | 110 | ktime_t rq_xtime; /* transmit time stamp */ |
1da177e4 | 111 | int rq_ntrans; |
56632b5b | 112 | |
9e00abc3 | 113 | #if defined(CONFIG_SUNRPC_BACKCHANNEL) |
56632b5b RL |
114 | struct list_head rq_bc_list; /* Callback service list */ |
115 | unsigned long rq_bc_pa_state; /* Backchannel prealloc state */ | |
116 | struct list_head rq_bc_pa_list; /* Backchannel prealloc list */ | |
9e00abc3 | 117 | #endif /* CONFIG_SUNRPC_BACKCHANEL */ |
1da177e4 LT |
118 | }; |
119 | #define rq_svec rq_snd_buf.head | |
120 | #define rq_slen rq_snd_buf.len | |
121 | ||
a246b010 | 122 | struct rpc_xprt_ops { |
470056c2 | 123 | void (*set_buffer_size)(struct rpc_xprt *xprt, size_t sndsize, size_t rcvsize); |
43cedbf0 | 124 | int (*reserve_xprt)(struct rpc_xprt *xprt, struct rpc_task *task); |
49e9a890 | 125 | void (*release_xprt)(struct rpc_xprt *xprt, struct rpc_task *task); |
f39c1bfb | 126 | void (*alloc_slot)(struct rpc_xprt *xprt, struct rpc_task *task); |
bbf7c1dd | 127 | void (*rpcbind)(struct rpc_task *task); |
92200412 | 128 | void (*set_port)(struct rpc_xprt *xprt, unsigned short port); |
1b092092 | 129 | void (*connect)(struct rpc_xprt *xprt, struct rpc_task *task); |
02107148 | 130 | void * (*buf_alloc)(struct rpc_task *task, size_t size); |
c5a4dd8b | 131 | void (*buf_free)(void *buffer); |
a246b010 | 132 | int (*send_request)(struct rpc_task *task); |
fe3aca29 | 133 | void (*set_retrans_timeout)(struct rpc_task *task); |
6a24dfb6 | 134 | void (*timer)(struct rpc_xprt *xprt, struct rpc_task *task); |
a58dd398 | 135 | void (*release_request)(struct rpc_task *task); |
a246b010 CL |
136 | void (*close)(struct rpc_xprt *xprt); |
137 | void (*destroy)(struct rpc_xprt *xprt); | |
262ca07d | 138 | void (*print_stats)(struct rpc_xprt *xprt, struct seq_file *seq); |
d67fa4d8 JL |
139 | int (*enable_swap)(struct rpc_xprt *xprt); |
140 | void (*disable_swap)(struct rpc_xprt *xprt); | |
4a068258 | 141 | void (*inject_disconnect)(struct rpc_xprt *xprt); |
42e5c3e2 CL |
142 | int (*bc_setup)(struct rpc_xprt *xprt, |
143 | unsigned int min_reqs); | |
76566773 | 144 | int (*bc_up)(struct svc_serv *serv, struct net *net); |
6b26cc8c | 145 | size_t (*bc_maxpayload)(struct rpc_xprt *xprt); |
42e5c3e2 CL |
146 | void (*bc_free_rqst)(struct rpc_rqst *rqst); |
147 | void (*bc_destroy)(struct rpc_xprt *xprt, | |
148 | unsigned int max_reqs); | |
a246b010 | 149 | }; |
1da177e4 | 150 | |
f300baba AB |
151 | /* |
152 | * RPC transport identifiers | |
153 | * | |
154 | * To preserve compatibility with the historical use of raw IP protocol | |
155 | * id's for transport selection, UDP and TCP identifiers are specified | |
156 | * with the previous values. No such restriction exists for new transports, | |
157 | * except that they may not collide with these values (17 and 6, | |
158 | * respectively). | |
159 | */ | |
160 | #define XPRT_TRANSPORT_BC (1 << 31) | |
161 | enum xprt_transports { | |
162 | XPRT_TRANSPORT_UDP = IPPROTO_UDP, | |
163 | XPRT_TRANSPORT_TCP = IPPROTO_TCP, | |
164 | XPRT_TRANSPORT_BC_TCP = IPPROTO_TCP | XPRT_TRANSPORT_BC, | |
176e21ee | 165 | XPRT_TRANSPORT_RDMA = 256, |
94684319 | 166 | XPRT_TRANSPORT_BC_RDMA = XPRT_TRANSPORT_RDMA | XPRT_TRANSPORT_BC, |
176e21ee | 167 | XPRT_TRANSPORT_LOCAL = 257, |
f300baba AB |
168 | }; |
169 | ||
1da177e4 | 170 | struct rpc_xprt { |
30c5116b | 171 | struct kref kref; /* Reference count */ |
a246b010 | 172 | struct rpc_xprt_ops * ops; /* transport methods */ |
1da177e4 | 173 | |
ba7392bb | 174 | const struct rpc_timeout *timeout; /* timeout parms */ |
c4efcb1d CL |
175 | struct sockaddr_storage addr; /* server address */ |
176 | size_t addrlen; /* size of server address */ | |
1da177e4 LT |
177 | int prot; /* IP protocol */ |
178 | ||
179 | unsigned long cong; /* current congestion */ | |
180 | unsigned long cwnd; /* congestion window */ | |
181 | ||
1da177e4 LT |
182 | size_t max_payload; /* largest RPC payload size, |
183 | in bytes */ | |
808012fb CL |
184 | unsigned int tsh_size; /* size of transport specific |
185 | header */ | |
1da177e4 | 186 | |
4a68179d | 187 | struct rpc_wait_queue binding; /* requests waiting on rpcbind */ |
1da177e4 | 188 | struct rpc_wait_queue sending; /* requests waiting to send */ |
1da177e4 LT |
189 | struct rpc_wait_queue pending; /* requests in flight */ |
190 | struct rpc_wait_queue backlog; /* waiting for slot */ | |
191 | struct list_head free; /* free slots */ | |
d9ba131d TM |
192 | unsigned int max_reqs; /* max number of slots */ |
193 | unsigned int min_reqs; /* min number of slots */ | |
194 | atomic_t num_reqs; /* total slots */ | |
2226feb6 | 195 | unsigned long state; /* transport state */ |
d19751e7 | 196 | unsigned char resvport : 1; /* use a reserved port */ |
8e228133 | 197 | atomic_t swapper; /* we're swapping over this |
a564b8f0 | 198 | transport */ |
a509050b | 199 | unsigned int bind_index; /* bind function index */ |
1da177e4 | 200 | |
80b14d5e TM |
201 | /* |
202 | * Multipath | |
203 | */ | |
204 | struct list_head xprt_switch; | |
205 | ||
1da177e4 | 206 | /* |
55aa4f58 | 207 | * Connection of transports |
1da177e4 | 208 | */ |
a8ce4a8f | 209 | unsigned long bind_timeout, |
03bf4b70 | 210 | reestablish_timeout; |
7c1d71cf TM |
211 | unsigned int connect_cookie; /* A cookie that gets bumped |
212 | every time the transport | |
213 | is reconnected */ | |
03bf4b70 | 214 | |
1da177e4 | 215 | /* |
55aa4f58 | 216 | * Disconnection of idle transports |
1da177e4 LT |
217 | */ |
218 | struct work_struct task_cleanup; | |
219 | struct timer_list timer; | |
03bf4b70 CL |
220 | unsigned long last_used, |
221 | idle_timeout; | |
1da177e4 LT |
222 | |
223 | /* | |
224 | * Send stuff | |
225 | */ | |
4a0f8c04 | 226 | spinlock_t transport_lock; /* lock transport info */ |
5dc07727 | 227 | spinlock_t reserve_lock; /* lock slot table */ |
e744cf2e | 228 | u32 xid; /* Next XID value to use */ |
1da177e4 | 229 | struct rpc_task * snd_task; /* Task blocked in send */ |
4cfc7e60 | 230 | struct svc_xprt *bc_xprt; /* NFSv4.1 backchannel */ |
9e00abc3 | 231 | #if defined(CONFIG_SUNRPC_BACKCHANNEL) |
56632b5b RL |
232 | struct svc_serv *bc_serv; /* The RPC service which will */ |
233 | /* process the callback */ | |
0d2a970d TM |
234 | int bc_alloc_count; /* Total number of preallocs */ |
235 | atomic_t bc_free_slots; | |
56632b5b RL |
236 | spinlock_t bc_pa_lock; /* Protects the preallocated |
237 | * items */ | |
238 | struct list_head bc_pa_list; /* List of preallocated | |
239 | * backchannel rpc_rqst's */ | |
9e00abc3 | 240 | #endif /* CONFIG_SUNRPC_BACKCHANNEL */ |
1da177e4 LT |
241 | struct list_head recv; |
242 | ||
262ca07d CL |
243 | struct { |
244 | unsigned long bind_count, /* total number of binds */ | |
245 | connect_count, /* total number of connects */ | |
246 | connect_start, /* connect start timestamp */ | |
247 | connect_time, /* jiffies waiting for connect */ | |
248 | sends, /* how many complete requests */ | |
249 | recvs, /* how many complete requests */ | |
15a45206 AA |
250 | bad_xids, /* lookup_rqst didn't find XID */ |
251 | max_slots; /* max rpc_slots used */ | |
262ca07d CL |
252 | |
253 | unsigned long long req_u, /* average requests on the wire */ | |
15a45206 AA |
254 | bklog_u, /* backlog queue utilization */ |
255 | sending_u, /* send q utilization */ | |
256 | pending_u; /* pend q utilization */ | |
262ca07d | 257 | } stat; |
1da177e4 | 258 | |
37aa2133 | 259 | struct net *xprt_net; |
4e0038b6 | 260 | const char *servername; |
b454ae90 | 261 | const char *address_strings[RPC_DISPLAY_MAX]; |
388f0c77 JL |
262 | #if IS_ENABLED(CONFIG_SUNRPC_DEBUG) |
263 | struct dentry *debugfs; /* debugfs directory */ | |
4a068258 | 264 | atomic_t inject_disconnect; |
388f0c77 | 265 | #endif |
fda1bfef | 266 | struct rcu_head rcu; |
1da177e4 LT |
267 | }; |
268 | ||
9e00abc3 | 269 | #if defined(CONFIG_SUNRPC_BACKCHANNEL) |
56632b5b RL |
270 | /* |
271 | * Backchannel flags | |
272 | */ | |
273 | #define RPC_BC_PA_IN_USE 0x0001 /* Preallocated backchannel */ | |
274 | /* buffer in use */ | |
9e00abc3 | 275 | #endif /* CONFIG_SUNRPC_BACKCHANNEL */ |
56632b5b | 276 | |
9e00abc3 | 277 | #if defined(CONFIG_SUNRPC_BACKCHANNEL) |
55ae1aab RL |
278 | static inline int bc_prealloc(struct rpc_rqst *req) |
279 | { | |
280 | return test_bit(RPC_BC_PA_IN_USE, &req->rq_bc_pa_state); | |
281 | } | |
282 | #else | |
283 | static inline int bc_prealloc(struct rpc_rqst *req) | |
284 | { | |
285 | return 0; | |
286 | } | |
9e00abc3 | 287 | #endif /* CONFIG_SUNRPC_BACKCHANNEL */ |
55ae1aab | 288 | |
b7993ceb | 289 | #define XPRT_CREATE_INFINITE_SLOTS (1U) |
33d90ac0 | 290 | #define XPRT_CREATE_NO_IDLE_TIMEOUT (1U << 1) |
b7993ceb | 291 | |
3c341b0b | 292 | struct xprt_create { |
4fa016eb | 293 | int ident; /* XPRT_TRANSPORT identifier */ |
9a23e332 | 294 | struct net * net; |
d3bc9a1d | 295 | struct sockaddr * srcaddr; /* optional local address */ |
96802a09 FM |
296 | struct sockaddr * dstaddr; /* remote peer address */ |
297 | size_t addrlen; | |
4e0038b6 | 298 | const char *servername; |
f300baba | 299 | struct svc_xprt *bc_xprt; /* NFSv4.1 backchannel */ |
39a9beab | 300 | struct rpc_xprt_switch *bc_xps; |
b7993ceb | 301 | unsigned int flags; |
96802a09 | 302 | }; |
1da177e4 | 303 | |
81c098af TT |
304 | struct xprt_class { |
305 | struct list_head list; | |
4fa016eb | 306 | int ident; /* XPRT_TRANSPORT identifier */ |
3c341b0b | 307 | struct rpc_xprt * (*setup)(struct xprt_create *); |
81c098af TT |
308 | struct module *owner; |
309 | char name[32]; | |
310 | }; | |
311 | ||
55aa4f58 CL |
312 | /* |
313 | * Generic internal transport functions | |
314 | */ | |
3c341b0b | 315 | struct rpc_xprt *xprt_create_transport(struct xprt_create *args); |
55aa4f58 CL |
316 | void xprt_connect(struct rpc_task *task); |
317 | void xprt_reserve(struct rpc_task *task); | |
ba60eb25 | 318 | void xprt_retry_reserve(struct rpc_task *task); |
43cedbf0 TM |
319 | int xprt_reserve_xprt(struct rpc_xprt *xprt, struct rpc_task *task); |
320 | int xprt_reserve_xprt_cong(struct rpc_xprt *xprt, struct rpc_task *task); | |
f39c1bfb TM |
321 | void xprt_alloc_slot(struct rpc_xprt *xprt, struct rpc_task *task); |
322 | void xprt_lock_and_alloc_slot(struct rpc_xprt *xprt, struct rpc_task *task); | |
90051ea7 | 323 | bool xprt_prepare_transmit(struct rpc_task *task); |
55aa4f58 | 324 | void xprt_transmit(struct rpc_task *task); |
e0ab53de | 325 | void xprt_end_transmit(struct rpc_task *task); |
1da177e4 | 326 | int xprt_adjust_timeout(struct rpc_rqst *req); |
49e9a890 CL |
327 | void xprt_release_xprt(struct rpc_xprt *xprt, struct rpc_task *task); |
328 | void xprt_release_xprt_cong(struct rpc_xprt *xprt, struct rpc_task *task); | |
55aa4f58 | 329 | void xprt_release(struct rpc_task *task); |
30c5116b | 330 | struct rpc_xprt * xprt_get(struct rpc_xprt *xprt); |
6b6ca86b | 331 | void xprt_put(struct rpc_xprt *xprt); |
d9ba131d TM |
332 | struct rpc_xprt * xprt_alloc(struct net *net, size_t size, |
333 | unsigned int num_prealloc, | |
334 | unsigned int max_req); | |
e204e621 | 335 | void xprt_free(struct rpc_xprt *); |
55aa4f58 | 336 | |
d8ed029d | 337 | static inline __be32 *xprt_skip_transport_header(struct rpc_xprt *xprt, __be32 *p) |
808012fb CL |
338 | { |
339 | return p + xprt->tsh_size; | |
340 | } | |
341 | ||
d67fa4d8 JL |
342 | static inline int |
343 | xprt_enable_swap(struct rpc_xprt *xprt) | |
344 | { | |
345 | return xprt->ops->enable_swap(xprt); | |
346 | } | |
347 | ||
348 | static inline void | |
349 | xprt_disable_swap(struct rpc_xprt *xprt) | |
350 | { | |
351 | xprt->ops->disable_swap(xprt); | |
352 | } | |
353 | ||
55aa4f58 CL |
354 | /* |
355 | * Transport switch helper functions | |
356 | */ | |
81c098af TT |
357 | int xprt_register_transport(struct xprt_class *type); |
358 | int xprt_unregister_transport(struct xprt_class *type); | |
441e3e24 | 359 | int xprt_load_transport(const char *); |
fe3aca29 CL |
360 | void xprt_set_retrans_timeout_def(struct rpc_task *task); |
361 | void xprt_set_retrans_timeout_rtt(struct rpc_task *task); | |
55aa4f58 | 362 | void xprt_wake_pending_tasks(struct rpc_xprt *xprt, int status); |
b6ddf64f | 363 | void xprt_wait_for_buffer_space(struct rpc_task *task, rpc_action action); |
c7b2cae8 | 364 | void xprt_write_space(struct rpc_xprt *xprt); |
6a24dfb6 | 365 | void xprt_adjust_cwnd(struct rpc_xprt *xprt, struct rpc_task *task, int result); |
d8ed029d | 366 | struct rpc_rqst * xprt_lookup_rqst(struct rpc_xprt *xprt, __be32 xid); |
1570c1e4 | 367 | void xprt_complete_rqst(struct rpc_task *task, int copied); |
a58dd398 | 368 | void xprt_release_rqst_cong(struct rpc_task *task); |
62da3b24 | 369 | void xprt_disconnect_done(struct rpc_xprt *xprt); |
66af1e55 | 370 | void xprt_force_disconnect(struct rpc_xprt *xprt); |
7c1d71cf | 371 | void xprt_conditional_disconnect(struct rpc_xprt *xprt, unsigned int cookie); |
55aa4f58 | 372 | |
718ba5b8 TM |
373 | bool xprt_lock_connect(struct rpc_xprt *, struct rpc_task *, void *); |
374 | void xprt_unlock_connect(struct rpc_xprt *, void *); | |
375 | ||
2226feb6 CL |
376 | /* |
377 | * Reserved bit positions in xprt->state | |
378 | */ | |
379 | #define XPRT_LOCKED (0) | |
380 | #define XPRT_CONNECTED (1) | |
381 | #define XPRT_CONNECTING (2) | |
632e3bdc | 382 | #define XPRT_CLOSE_WAIT (3) |
ec739ef0 | 383 | #define XPRT_BOUND (4) |
4a68179d | 384 | #define XPRT_BINDING (5) |
3b948ae5 | 385 | #define XPRT_CLOSING (6) |
ba60eb25 | 386 | #define XPRT_CONGESTED (9) |
2226feb6 CL |
387 | |
388 | static inline void xprt_set_connected(struct rpc_xprt *xprt) | |
389 | { | |
390 | set_bit(XPRT_CONNECTED, &xprt->state); | |
391 | } | |
392 | ||
393 | static inline void xprt_clear_connected(struct rpc_xprt *xprt) | |
394 | { | |
395 | clear_bit(XPRT_CONNECTED, &xprt->state); | |
396 | } | |
397 | ||
398 | static inline int xprt_connected(struct rpc_xprt *xprt) | |
399 | { | |
400 | return test_bit(XPRT_CONNECTED, &xprt->state); | |
401 | } | |
402 | ||
403 | static inline int xprt_test_and_set_connected(struct rpc_xprt *xprt) | |
404 | { | |
405 | return test_and_set_bit(XPRT_CONNECTED, &xprt->state); | |
406 | } | |
407 | ||
408 | static inline int xprt_test_and_clear_connected(struct rpc_xprt *xprt) | |
409 | { | |
410 | return test_and_clear_bit(XPRT_CONNECTED, &xprt->state); | |
411 | } | |
412 | ||
413 | static inline void xprt_clear_connecting(struct rpc_xprt *xprt) | |
414 | { | |
4e857c58 | 415 | smp_mb__before_atomic(); |
2226feb6 | 416 | clear_bit(XPRT_CONNECTING, &xprt->state); |
4e857c58 | 417 | smp_mb__after_atomic(); |
2226feb6 CL |
418 | } |
419 | ||
420 | static inline int xprt_connecting(struct rpc_xprt *xprt) | |
421 | { | |
422 | return test_bit(XPRT_CONNECTING, &xprt->state); | |
423 | } | |
424 | ||
425 | static inline int xprt_test_and_set_connecting(struct rpc_xprt *xprt) | |
426 | { | |
427 | return test_and_set_bit(XPRT_CONNECTING, &xprt->state); | |
428 | } | |
1da177e4 | 429 | |
ec739ef0 CL |
430 | static inline void xprt_set_bound(struct rpc_xprt *xprt) |
431 | { | |
432 | test_and_set_bit(XPRT_BOUND, &xprt->state); | |
433 | } | |
434 | ||
435 | static inline int xprt_bound(struct rpc_xprt *xprt) | |
436 | { | |
437 | return test_bit(XPRT_BOUND, &xprt->state); | |
438 | } | |
439 | ||
440 | static inline void xprt_clear_bound(struct rpc_xprt *xprt) | |
441 | { | |
442 | clear_bit(XPRT_BOUND, &xprt->state); | |
443 | } | |
444 | ||
4a68179d CL |
445 | static inline void xprt_clear_binding(struct rpc_xprt *xprt) |
446 | { | |
4e857c58 | 447 | smp_mb__before_atomic(); |
4a68179d | 448 | clear_bit(XPRT_BINDING, &xprt->state); |
4e857c58 | 449 | smp_mb__after_atomic(); |
4a68179d CL |
450 | } |
451 | ||
452 | static inline int xprt_test_and_set_binding(struct rpc_xprt *xprt) | |
453 | { | |
454 | return test_and_set_bit(XPRT_BINDING, &xprt->state); | |
455 | } | |
456 | ||
4a068258 CL |
457 | #if IS_ENABLED(CONFIG_SUNRPC_DEBUG) |
458 | extern unsigned int rpc_inject_disconnect; | |
459 | static inline void xprt_inject_disconnect(struct rpc_xprt *xprt) | |
460 | { | |
461 | if (!rpc_inject_disconnect) | |
462 | return; | |
463 | if (atomic_dec_return(&xprt->inject_disconnect)) | |
464 | return; | |
465 | atomic_set(&xprt->inject_disconnect, rpc_inject_disconnect); | |
466 | xprt->ops->inject_disconnect(xprt); | |
467 | } | |
468 | #else | |
469 | static inline void xprt_inject_disconnect(struct rpc_xprt *xprt) | |
470 | { | |
471 | } | |
472 | #endif | |
473 | ||
1da177e4 LT |
474 | #endif /* __KERNEL__*/ |
475 | ||
476 | #endif /* _LINUX_SUNRPC_XPRT_H */ |