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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
39de8281 AG |
2 | #ifndef _RDS_RDS_H |
3 | #define _RDS_RDS_H | |
4 | ||
5 | #include <net/sock.h> | |
6 | #include <linux/scatterlist.h> | |
7 | #include <linux/highmem.h> | |
8 | #include <rdma/rdma_cm.h> | |
9 | #include <linux/mutex.h> | |
10 | #include <linux/rds.h> | |
7b565434 | 11 | #include <linux/rhashtable.h> |
b7f02920 | 12 | #include <linux/refcount.h> |
eee2fa6a | 13 | #include <linux/in6.h> |
39de8281 AG |
14 | |
15 | #include "info.h" | |
16 | ||
17 | /* | |
18 | * RDS Network protocol version | |
19 | */ | |
20 | #define RDS_PROTOCOL_3_0 0x0300 | |
21 | #define RDS_PROTOCOL_3_1 0x0301 | |
22 | #define RDS_PROTOCOL_VERSION RDS_PROTOCOL_3_1 | |
23 | #define RDS_PROTOCOL_MAJOR(v) ((v) >> 8) | |
24 | #define RDS_PROTOCOL_MINOR(v) ((v) & 255) | |
25 | #define RDS_PROTOCOL(maj, min) (((maj) << 8) | min) | |
26 | ||
1e2b44e7 KCP |
27 | /* The following ports, 16385, 18634, 18635, are registered with IANA as |
28 | * the ports to be used for RDS over TCP and UDP. Currently, only RDS over | |
29 | * TCP and RDS over IB/RDMA are implemented. 18634 is the historical value | |
30 | * used for the RDMA_CM listener port. RDS/TCP uses port 16385. After | |
31 | * IPv6 work, RDMA_CM also uses 16385 as the listener port. 18634 is kept | |
32 | * to ensure compatibility with older RDS modules. Those ports are defined | |
33 | * in each transport's header file. | |
39de8281 AG |
34 | */ |
35 | #define RDS_PORT 18634 | |
36 | ||
8cbd9606 AG |
37 | #ifdef ATOMIC64_INIT |
38 | #define KERNEL_HAS_ATOMIC64 | |
39 | #endif | |
40 | ||
ff57087f | 41 | #ifdef RDS_DEBUG |
39de8281 AG |
42 | #define rdsdebug(fmt, args...) pr_debug("%s(): " fmt, __func__ , ##args) |
43 | #else | |
44 | /* sigh, pr_debug() causes unused variable warnings */ | |
b9075fa9 JP |
45 | static inline __printf(1, 2) |
46 | void rdsdebug(char *fmt, ...) | |
39de8281 AG |
47 | { |
48 | } | |
49 | #endif | |
50 | ||
39de8281 AG |
51 | #define RDS_FRAG_SHIFT 12 |
52 | #define RDS_FRAG_SIZE ((unsigned int)(1 << RDS_FRAG_SHIFT)) | |
53 | ||
f9fb69ad AR |
54 | /* Used to limit both RDMA and non-RDMA RDS message to 1MB */ |
55 | #define RDS_MAX_MSG_SIZE ((unsigned int)(1 << 20)) | |
56 | ||
39de8281 | 57 | #define RDS_CONG_MAP_BYTES (65536 / 8) |
39de8281 AG |
58 | #define RDS_CONG_MAP_PAGES (PAGE_ALIGN(RDS_CONG_MAP_BYTES) / PAGE_SIZE) |
59 | #define RDS_CONG_MAP_PAGE_BITS (PAGE_SIZE * 8) | |
60 | ||
61 | struct rds_cong_map { | |
62 | struct rb_node m_rb_node; | |
eee2fa6a | 63 | struct in6_addr m_addr; |
39de8281 AG |
64 | wait_queue_head_t m_waitq; |
65 | struct list_head m_conn_list; | |
66 | unsigned long m_page_addrs[RDS_CONG_MAP_PAGES]; | |
67 | }; | |
68 | ||
69 | ||
70 | /* | |
71 | * This is how we will track the connection state: | |
72 | * A connection is always in one of the following | |
73 | * states. Updates to the state are atomic and imply | |
74 | * a memory barrier. | |
75 | */ | |
76 | enum { | |
77 | RDS_CONN_DOWN = 0, | |
78 | RDS_CONN_CONNECTING, | |
79 | RDS_CONN_DISCONNECTING, | |
80 | RDS_CONN_UP, | |
9c79440e | 81 | RDS_CONN_RESETTING, |
39de8281 AG |
82 | RDS_CONN_ERROR, |
83 | }; | |
84 | ||
85 | /* Bits for c_flags */ | |
86 | #define RDS_LL_SEND_FULL 0 | |
87 | #define RDS_RECONNECT_PENDING 1 | |
0f4b1c7e | 88 | #define RDS_IN_XMIT 2 |
73ce4317 | 89 | #define RDS_RECV_REFILL 3 |
c90ecbfa | 90 | #define RDS_DESTROY_PENDING 4 |
39de8281 | 91 | |
0cb43965 | 92 | /* Max number of multipaths per RDS connection. Must be a power of 2 */ |
5916e2c1 SV |
93 | #define RDS_MPATH_WORKERS 8 |
94 | #define RDS_MPATH_HASH(rs, n) (jhash_1word((rs)->rs_bound_port, \ | |
95 | (rs)->rs_hash_initval) & ((n) - 1)) | |
0cb43965 | 96 | |
00354de5 SV |
97 | #define IS_CANONICAL(laddr, faddr) (htonl(laddr) < htonl(faddr)) |
98 | ||
0cb43965 SV |
99 | /* Per mpath connection state */ |
100 | struct rds_conn_path { | |
101 | struct rds_connection *cp_conn; | |
102 | struct rds_message *cp_xmit_rm; | |
103 | unsigned long cp_xmit_sg; | |
104 | unsigned int cp_xmit_hdr_off; | |
105 | unsigned int cp_xmit_data_off; | |
106 | unsigned int cp_xmit_atomic_sent; | |
107 | unsigned int cp_xmit_rdma_sent; | |
108 | unsigned int cp_xmit_data_sent; | |
109 | ||
110 | spinlock_t cp_lock; /* protect msg queues */ | |
111 | u64 cp_next_tx_seq; | |
112 | struct list_head cp_send_queue; | |
113 | struct list_head cp_retrans; | |
114 | ||
115 | u64 cp_next_rx_seq; | |
116 | ||
117 | void *cp_transport_data; | |
118 | ||
119 | atomic_t cp_state; | |
120 | unsigned long cp_send_gen; | |
121 | unsigned long cp_flags; | |
122 | unsigned long cp_reconnect_jiffies; | |
123 | struct delayed_work cp_send_w; | |
124 | struct delayed_work cp_recv_w; | |
125 | struct delayed_work cp_conn_w; | |
126 | struct work_struct cp_down_w; | |
127 | struct mutex cp_cm_lock; /* protect cp_state & cm */ | |
128 | wait_queue_head_t cp_waitq; | |
129 | ||
130 | unsigned int cp_unacked_packets; | |
131 | unsigned int cp_unacked_bytes; | |
0cb43965 SV |
132 | unsigned int cp_index; |
133 | }; | |
134 | ||
135 | /* One rds_connection per RDS address pair */ | |
39de8281 AG |
136 | struct rds_connection { |
137 | struct hlist_node c_hash_node; | |
eee2fa6a KCP |
138 | struct in6_addr c_laddr; |
139 | struct in6_addr c_faddr; | |
1e2b44e7 KCP |
140 | int c_dev_if; /* ifindex used for this conn */ |
141 | int c_bound_if; /* ifindex of c_laddr */ | |
3b20fc38 | 142 | unsigned int c_loopback:1, |
eee2fa6a | 143 | c_isv6:1, |
5916e2c1 | 144 | c_ping_triggered:1, |
eee2fa6a | 145 | c_pad_to_32:29; |
0cb43965 | 146 | int c_npaths; |
39de8281 | 147 | struct rds_connection *c_passive; |
0cb43965 | 148 | struct rds_transport *c_trans; |
39de8281 AG |
149 | |
150 | struct rds_cong_map *c_lcong; | |
151 | struct rds_cong_map *c_fcong; | |
152 | ||
0cb43965 SV |
153 | /* Protocol version */ |
154 | unsigned int c_version; | |
681648e6 | 155 | possible_net_t c_net; |
39de8281 AG |
156 | |
157 | struct list_head c_map_item; | |
158 | unsigned long c_map_queued; | |
39de8281 | 159 | |
840df162 | 160 | struct rds_conn_path *c_path; |
5916e2c1 | 161 | wait_queue_head_t c_hs_waitq; /* handshake waitq */ |
905dd418 SV |
162 | |
163 | u32 c_my_gen_num; | |
164 | u32 c_peer_gen_num; | |
39de8281 AG |
165 | }; |
166 | ||
d5a8ac28 SV |
167 | static inline |
168 | struct net *rds_conn_net(struct rds_connection *conn) | |
169 | { | |
681648e6 | 170 | return read_pnet(&conn->c_net); |
d5a8ac28 SV |
171 | } |
172 | ||
173 | static inline | |
174 | void rds_conn_net_set(struct rds_connection *conn, struct net *net) | |
175 | { | |
681648e6 | 176 | write_pnet(&conn->c_net, net); |
d5a8ac28 SV |
177 | } |
178 | ||
39de8281 AG |
179 | #define RDS_FLAG_CONG_BITMAP 0x01 |
180 | #define RDS_FLAG_ACK_REQUIRED 0x02 | |
181 | #define RDS_FLAG_RETRANSMITTED 0x04 | |
7b70d033 | 182 | #define RDS_MAX_ADV_CREDIT 255 |
39de8281 | 183 | |
5916e2c1 SV |
184 | /* RDS_FLAG_PROBE_PORT is the reserved sport used for sending a ping |
185 | * probe to exchange control information before establishing a connection. | |
186 | * Currently the control information that is exchanged is the number of | |
187 | * supported paths. If the peer is a legacy (older kernel revision) peer, | |
188 | * it would return a pong message without additional control information | |
189 | * that would then alert the sender that the peer was an older rev. | |
190 | */ | |
191 | #define RDS_FLAG_PROBE_PORT 1 | |
192 | #define RDS_HS_PROBE(sport, dport) \ | |
193 | ((sport == RDS_FLAG_PROBE_PORT && dport == 0) || \ | |
194 | (sport == 0 && dport == RDS_FLAG_PROBE_PORT)) | |
39de8281 AG |
195 | /* |
196 | * Maximum space available for extension headers. | |
197 | */ | |
198 | #define RDS_HEADER_EXT_SPACE 16 | |
199 | ||
200 | struct rds_header { | |
201 | __be64 h_sequence; | |
202 | __be64 h_ack; | |
203 | __be32 h_len; | |
204 | __be16 h_sport; | |
205 | __be16 h_dport; | |
206 | u8 h_flags; | |
207 | u8 h_credit; | |
208 | u8 h_padding[4]; | |
209 | __sum16 h_csum; | |
210 | ||
211 | u8 h_exthdr[RDS_HEADER_EXT_SPACE]; | |
212 | }; | |
213 | ||
214 | /* | |
215 | * Reserved - indicates end of extensions | |
216 | */ | |
217 | #define RDS_EXTHDR_NONE 0 | |
218 | ||
219 | /* | |
220 | * This extension header is included in the very | |
221 | * first message that is sent on a new connection, | |
222 | * and identifies the protocol level. This will help | |
223 | * rolling updates if a future change requires breaking | |
224 | * the protocol. | |
225 | * NB: This is no longer true for IB, where we do a version | |
226 | * negotiation during the connection setup phase (protocol | |
227 | * version information is included in the RDMA CM private data). | |
228 | */ | |
229 | #define RDS_EXTHDR_VERSION 1 | |
230 | struct rds_ext_header_version { | |
231 | __be32 h_version; | |
232 | }; | |
233 | ||
234 | /* | |
235 | * This extension header is included in the RDS message | |
236 | * chasing an RDMA operation. | |
237 | */ | |
238 | #define RDS_EXTHDR_RDMA 2 | |
239 | struct rds_ext_header_rdma { | |
240 | __be32 h_rdma_rkey; | |
241 | }; | |
242 | ||
243 | /* | |
244 | * This extension header tells the peer about the | |
245 | * destination <R_Key,offset> of the requested RDMA | |
246 | * operation. | |
247 | */ | |
248 | #define RDS_EXTHDR_RDMA_DEST 3 | |
249 | struct rds_ext_header_rdma_dest { | |
250 | __be32 h_rdma_rkey; | |
251 | __be32 h_rdma_offset; | |
252 | }; | |
253 | ||
5916e2c1 SV |
254 | /* Extension header announcing number of paths. |
255 | * Implicit length = 2 bytes. | |
256 | */ | |
905dd418 SV |
257 | #define RDS_EXTHDR_NPATHS 5 |
258 | #define RDS_EXTHDR_GEN_NUM 6 | |
5916e2c1 | 259 | |
39de8281 | 260 | #define __RDS_EXTHDR_MAX 16 /* for now */ |
3289025a SS |
261 | #define RDS_RX_MAX_TRACES (RDS_MSG_RX_DGRAM_TRACE_MAX + 1) |
262 | #define RDS_MSG_RX_HDR 0 | |
263 | #define RDS_MSG_RX_START 1 | |
264 | #define RDS_MSG_RX_END 2 | |
265 | #define RDS_MSG_RX_CMSG 3 | |
39de8281 AG |
266 | |
267 | struct rds_incoming { | |
b7f02920 | 268 | refcount_t i_refcount; |
39de8281 AG |
269 | struct list_head i_item; |
270 | struct rds_connection *i_conn; | |
ef9e62c2 | 271 | struct rds_conn_path *i_conn_path; |
39de8281 AG |
272 | struct rds_header i_hdr; |
273 | unsigned long i_rx_jiffies; | |
eee2fa6a | 274 | struct in6_addr i_saddr; |
39de8281 AG |
275 | |
276 | rds_rdma_cookie_t i_rdma_cookie; | |
2de9d505 | 277 | ktime_t i_rx_tstamp; |
3289025a | 278 | u64 i_rx_lat_trace[RDS_RX_MAX_TRACES]; |
39de8281 AG |
279 | }; |
280 | ||
21f79afa AG |
281 | struct rds_mr { |
282 | struct rb_node r_rb_node; | |
803ea850 | 283 | refcount_t r_refcount; |
21f79afa AG |
284 | u32 r_key; |
285 | ||
286 | /* A copy of the creation flags */ | |
287 | unsigned int r_use_once:1; | |
288 | unsigned int r_invalidate:1; | |
289 | unsigned int r_write:1; | |
290 | ||
291 | /* This is for RDS_MR_DEAD. | |
292 | * It would be nice & consistent to make this part of the above | |
293 | * bit field here, but we need to use test_and_set_bit. | |
294 | */ | |
295 | unsigned long r_state; | |
296 | struct rds_sock *r_sock; /* back pointer to the socket that owns us */ | |
297 | struct rds_transport *r_trans; | |
298 | void *r_trans_private; | |
299 | }; | |
300 | ||
301 | /* Flags for mr->r_state */ | |
302 | #define RDS_MR_DEAD 0 | |
303 | ||
21f79afa AG |
304 | static inline rds_rdma_cookie_t rds_rdma_make_cookie(u32 r_key, u32 offset) |
305 | { | |
306 | return r_key | (((u64) offset) << 32); | |
307 | } | |
308 | ||
309 | static inline u32 rds_rdma_cookie_key(rds_rdma_cookie_t cookie) | |
310 | { | |
311 | return cookie; | |
312 | } | |
313 | ||
314 | static inline u32 rds_rdma_cookie_offset(rds_rdma_cookie_t cookie) | |
315 | { | |
316 | return cookie >> 32; | |
317 | } | |
318 | ||
15133f6e AG |
319 | /* atomic operation types */ |
320 | #define RDS_ATOMIC_TYPE_CSWP 0 | |
321 | #define RDS_ATOMIC_TYPE_FADD 1 | |
322 | ||
39de8281 AG |
323 | /* |
324 | * m_sock_item and m_conn_item are on lists that are serialized under | |
325 | * conn->c_lock. m_sock_item has additional meaning in that once it is empty | |
326 | * the message will not be put back on the retransmit list after being sent. | |
327 | * messages that are canceled while being sent rely on this. | |
328 | * | |
329 | * m_inc is used by loopback so that it can pass an incoming message straight | |
330 | * back up into the rx path. It embeds a wire header which is also used by | |
331 | * the send path, which is kind of awkward. | |
332 | * | |
333 | * m_sock_item indicates the message's presence on a socket's send or receive | |
334 | * queue. m_rs will point to that socket. | |
335 | * | |
336 | * m_daddr is used by cancellation to prune messages to a given destination. | |
337 | * | |
338 | * The RDS_MSG_ON_SOCK and RDS_MSG_ON_CONN flags are used to avoid lock | |
339 | * nesting. As paths iterate over messages on a sock, or conn, they must | |
340 | * also lock the conn, or sock, to remove the message from those lists too. | |
341 | * Testing the flag to determine if the message is still on the lists lets | |
342 | * us avoid testing the list_head directly. That means each path can use | |
343 | * the message's list_head to keep it on a local list while juggling locks | |
344 | * without confusing the other path. | |
345 | * | |
346 | * m_ack_seq is an optional field set by transports who need a different | |
347 | * sequence number range to invalidate. They can use this in a callback | |
348 | * that they pass to rds_send_drop_acked() to see if each message has been | |
349 | * acked. The HAS_ACK_SEQ flag can be used to detect messages which haven't | |
350 | * had ack_seq set yet. | |
351 | */ | |
352 | #define RDS_MSG_ON_SOCK 1 | |
353 | #define RDS_MSG_ON_CONN 2 | |
354 | #define RDS_MSG_HAS_ACK_SEQ 3 | |
355 | #define RDS_MSG_ACK_REQUIRED 4 | |
356 | #define RDS_MSG_RETRANSMITTED 5 | |
357 | #define RDS_MSG_MAPPED 6 | |
358 | #define RDS_MSG_PAGEVEC 7 | |
905dd418 | 359 | #define RDS_MSG_FLUSH 8 |
39de8281 | 360 | |
01883eda | 361 | struct rds_znotifier { |
01883eda SV |
362 | struct mmpin z_mmp; |
363 | u32 z_cookie; | |
364 | }; | |
365 | ||
9426bbc6 SV |
366 | struct rds_msg_zcopy_info { |
367 | struct list_head rs_zcookie_next; | |
368 | union { | |
369 | struct rds_znotifier znotif; | |
370 | struct rds_zcopy_cookies zcookies; | |
371 | }; | |
372 | }; | |
01883eda | 373 | |
9426bbc6 SV |
374 | struct rds_msg_zcopy_queue { |
375 | struct list_head zcookie_head; | |
376 | spinlock_t lock; /* protects zcookie_head queue */ | |
377 | }; | |
378 | ||
379 | static inline void rds_message_zcopy_queue_init(struct rds_msg_zcopy_queue *q) | |
01883eda | 380 | { |
9426bbc6 SV |
381 | spin_lock_init(&q->lock); |
382 | INIT_LIST_HEAD(&q->zcookie_head); | |
01883eda SV |
383 | } |
384 | ||
ea010070 | 385 | struct rds_iov_vector { |
386 | struct rds_iovec *iov; | |
387 | int len; | |
388 | }; | |
389 | ||
390 | struct rds_iov_vector_arr { | |
391 | struct rds_iov_vector *vec; | |
392 | int len; | |
393 | int indx; | |
394 | int incr; | |
395 | }; | |
396 | ||
39de8281 | 397 | struct rds_message { |
6c5a1c4a | 398 | refcount_t m_refcount; |
39de8281 AG |
399 | struct list_head m_sock_item; |
400 | struct list_head m_conn_item; | |
401 | struct rds_incoming m_inc; | |
402 | u64 m_ack_seq; | |
eee2fa6a | 403 | struct in6_addr m_daddr; |
39de8281 AG |
404 | unsigned long m_flags; |
405 | ||
406 | /* Never access m_rs without holding m_rs_lock. | |
407 | * Lock nesting is | |
408 | * rm->m_rs_lock | |
409 | * -> rs->rs_lock | |
410 | */ | |
411 | spinlock_t m_rs_lock; | |
c83188dc CM |
412 | wait_queue_head_t m_flush_wait; |
413 | ||
39de8281 | 414 | struct rds_sock *m_rs; |
7e3bd65e AG |
415 | |
416 | /* cookie to send to remote, in rds header */ | |
39de8281 | 417 | rds_rdma_cookie_t m_rdma_cookie; |
7e3bd65e AG |
418 | |
419 | unsigned int m_used_sgs; | |
420 | unsigned int m_total_sgs; | |
421 | ||
ff3d7d36 AG |
422 | void *m_final_op; |
423 | ||
e779137a | 424 | struct { |
15133f6e AG |
425 | struct rm_atomic_op { |
426 | int op_type; | |
20c72bd5 AG |
427 | union { |
428 | struct { | |
429 | uint64_t compare; | |
430 | uint64_t swap; | |
431 | uint64_t compare_mask; | |
432 | uint64_t swap_mask; | |
433 | } op_m_cswp; | |
434 | struct { | |
435 | uint64_t add; | |
436 | uint64_t nocarry_mask; | |
437 | } op_m_fadd; | |
438 | }; | |
15133f6e AG |
439 | |
440 | u32 op_rkey; | |
441 | u64 op_remote_addr; | |
442 | unsigned int op_notify:1; | |
443 | unsigned int op_recverr:1; | |
444 | unsigned int op_mapped:1; | |
2c3a5f9a | 445 | unsigned int op_silent:1; |
15133f6e | 446 | unsigned int op_active:1; |
15133f6e | 447 | struct scatterlist *op_sg; |
f8b3aaf2 | 448 | struct rds_notifier *op_notifier; |
15133f6e AG |
449 | |
450 | struct rds_mr *op_rdma_mr; | |
451 | } atomic; | |
452 | struct rm_rdma_op { | |
f8b3aaf2 AG |
453 | u32 op_rkey; |
454 | u64 op_remote_addr; | |
455 | unsigned int op_write:1; | |
456 | unsigned int op_fence:1; | |
457 | unsigned int op_notify:1; | |
458 | unsigned int op_recverr:1; | |
459 | unsigned int op_mapped:1; | |
2c3a5f9a | 460 | unsigned int op_silent:1; |
f8b3aaf2 AG |
461 | unsigned int op_active:1; |
462 | unsigned int op_bytes; | |
463 | unsigned int op_nents; | |
464 | unsigned int op_count; | |
465 | struct scatterlist *op_sg; | |
466 | struct rds_notifier *op_notifier; | |
467 | ||
468 | struct rds_mr *op_rdma_mr; | |
e779137a | 469 | } rdma; |
15133f6e | 470 | struct rm_data_op { |
241eef3e | 471 | unsigned int op_active:1; |
941f8d55 | 472 | unsigned int op_notify:1; |
6c7cc6e4 AG |
473 | unsigned int op_nents; |
474 | unsigned int op_count; | |
d655a9fb WW |
475 | unsigned int op_dmasg; |
476 | unsigned int op_dmaoff; | |
01883eda | 477 | struct rds_znotifier *op_mmp_znotifier; |
6c7cc6e4 | 478 | struct scatterlist *op_sg; |
e779137a AG |
479 | } data; |
480 | }; | |
9e630bcb AR |
481 | |
482 | struct rds_conn_path *m_conn_path; | |
39de8281 AG |
483 | }; |
484 | ||
485 | /* | |
486 | * The RDS notifier is used (optionally) to tell the application about | |
487 | * completed RDMA operations. Rather than keeping the whole rds message | |
488 | * around on the queue, we allocate a small notifier that is put on the | |
489 | * socket's notifier_list. Notifications are delivered to the application | |
490 | * through control messages. | |
491 | */ | |
492 | struct rds_notifier { | |
493 | struct list_head n_list; | |
494 | uint64_t n_user_token; | |
495 | int n_status; | |
496 | }; | |
497 | ||
f1693c63 SS |
498 | /* Available as part of RDS core, so doesn't need to participate |
499 | * in get_preferred transport etc | |
500 | */ | |
501 | #define RDS_TRANS_LOOP 3 | |
502 | ||
39de8281 AG |
503 | /** |
504 | * struct rds_transport - transport specific behavioural hooks | |
505 | * | |
506 | * @xmit: .xmit is called by rds_send_xmit() to tell the transport to send | |
507 | * part of a message. The caller serializes on the send_sem so this | |
508 | * doesn't need to be reentrant for a given conn. The header must be | |
509 | * sent before the data payload. .xmit must be prepared to send a | |
510 | * message with no data payload. .xmit should return the number of | |
511 | * bytes that were sent down the connection, including header bytes. | |
512 | * Returning 0 tells the caller that it doesn't need to perform any | |
513 | * additional work now. This is usually the case when the transport has | |
514 | * filled the sending queue for its connection and will handle | |
515 | * triggering the rds thread to continue the send when space becomes | |
516 | * available. Returning -EAGAIN tells the caller to retry the send | |
517 | * immediately. Returning -ENOMEM tells the caller to retry the send at | |
518 | * some point in the future. | |
519 | * | |
520 | * @conn_shutdown: conn_shutdown stops traffic on the given connection. Once | |
521 | * it returns the connection can not call rds_recv_incoming(). | |
522 | * This will only be called once after conn_connect returns | |
523 | * non-zero success and will The caller serializes this with | |
524 | * the send and connecting paths (xmit_* and conn_*). The | |
525 | * transport is responsible for other serialization, including | |
526 | * rds_recv_incoming(). This is called in process context but | |
527 | * should try hard not to block. | |
39de8281 AG |
528 | */ |
529 | ||
530 | struct rds_transport { | |
531 | char t_name[TRANSNAMSIZ]; | |
532 | struct list_head t_item; | |
533 | struct module *t_owner; | |
7e8f4413 SV |
534 | unsigned int t_prefer_loopback:1, |
535 | t_mp_capable:1; | |
335776bd | 536 | unsigned int t_type; |
39de8281 | 537 | |
eee2fa6a KCP |
538 | int (*laddr_check)(struct net *net, const struct in6_addr *addr, |
539 | __u32 scope_id); | |
39de8281 AG |
540 | int (*conn_alloc)(struct rds_connection *conn, gfp_t gfp); |
541 | void (*conn_free)(void *data); | |
b04e8554 | 542 | int (*conn_path_connect)(struct rds_conn_path *cp); |
d769ef81 | 543 | void (*conn_path_shutdown)(struct rds_conn_path *conn); |
1f9ecd7e | 544 | void (*xmit_path_prepare)(struct rds_conn_path *cp); |
1f9ecd7e | 545 | void (*xmit_path_complete)(struct rds_conn_path *cp); |
39de8281 AG |
546 | int (*xmit)(struct rds_connection *conn, struct rds_message *rm, |
547 | unsigned int hdr_off, unsigned int sg, unsigned int off); | |
f8b3aaf2 | 548 | int (*xmit_rdma)(struct rds_connection *conn, struct rm_rdma_op *op); |
ff3d7d36 | 549 | int (*xmit_atomic)(struct rds_connection *conn, struct rm_atomic_op *op); |
2da43c4a | 550 | int (*recv_path)(struct rds_conn_path *cp); |
c310e72c | 551 | int (*inc_copy_to_user)(struct rds_incoming *inc, struct iov_iter *to); |
39de8281 AG |
552 | void (*inc_free)(struct rds_incoming *inc); |
553 | ||
554 | int (*cm_handle_connect)(struct rdma_cm_id *cm_id, | |
eee2fa6a KCP |
555 | struct rdma_cm_event *event, bool isv6); |
556 | int (*cm_initiate_connect)(struct rdma_cm_id *cm_id, bool isv6); | |
39de8281 AG |
557 | void (*cm_connect_complete)(struct rds_connection *conn, |
558 | struct rdma_cm_event *event); | |
559 | ||
560 | unsigned int (*stats_info_copy)(struct rds_info_iterator *iter, | |
561 | unsigned int avail); | |
562 | void (*exit)(void); | |
563 | void *(*get_mr)(struct scatterlist *sg, unsigned long nr_sg, | |
9e630bcb AR |
564 | struct rds_sock *rs, u32 *key_ret, |
565 | struct rds_connection *conn); | |
39de8281 AG |
566 | void (*sync_mr)(void *trans_private, int direction); |
567 | void (*free_mr)(void *trans_private, int invalidate); | |
568 | void (*flush_mrs)(void); | |
ebeeb1ad | 569 | bool (*t_unloading)(struct rds_connection *conn); |
39de8281 AG |
570 | }; |
571 | ||
eee2fa6a KCP |
572 | /* Bind hash table key length. It is the sum of the size of a struct |
573 | * in6_addr, a scope_id and a port. | |
574 | */ | |
575 | #define RDS_BOUND_KEY_LEN \ | |
576 | (sizeof(struct in6_addr) + sizeof(__u32) + sizeof(__be16)) | |
577 | ||
39de8281 AG |
578 | struct rds_sock { |
579 | struct sock rs_sk; | |
580 | ||
581 | u64 rs_user_addr; | |
582 | u64 rs_user_bytes; | |
583 | ||
584 | /* | |
585 | * bound_addr used for both incoming and outgoing, no INADDR_ANY | |
586 | * support. | |
587 | */ | |
7b565434 | 588 | struct rhash_head rs_bound_node; |
eee2fa6a KCP |
589 | u8 rs_bound_key[RDS_BOUND_KEY_LEN]; |
590 | struct sockaddr_in6 rs_bound_sin6; | |
591 | #define rs_bound_addr rs_bound_sin6.sin6_addr | |
592 | #define rs_bound_addr_v4 rs_bound_sin6.sin6_addr.s6_addr32[3] | |
593 | #define rs_bound_port rs_bound_sin6.sin6_port | |
594 | #define rs_bound_scope_id rs_bound_sin6.sin6_scope_id | |
595 | struct in6_addr rs_conn_addr; | |
596 | #define rs_conn_addr_v4 rs_conn_addr.s6_addr32[3] | |
39de8281 | 597 | __be16 rs_conn_port; |
39de8281 AG |
598 | struct rds_transport *rs_transport; |
599 | ||
600 | /* | |
601 | * rds_sendmsg caches the conn it used the last time around. | |
602 | * This helps avoid costly lookups. | |
603 | */ | |
604 | struct rds_connection *rs_conn; | |
605 | ||
606 | /* flag indicating we were congested or not */ | |
607 | int rs_congested; | |
b98ba52f AG |
608 | /* seen congestion (ENOBUFS) when sending? */ |
609 | int rs_seen_congestion; | |
39de8281 AG |
610 | |
611 | /* rs_lock protects all these adjacent members before the newline */ | |
612 | spinlock_t rs_lock; | |
613 | struct list_head rs_send_queue; | |
614 | u32 rs_snd_bytes; | |
615 | int rs_rcv_bytes; | |
616 | struct list_head rs_notify_queue; /* currently used for failed RDMAs */ | |
617 | ||
618 | /* Congestion wake_up. If rs_cong_monitor is set, we use cong_mask | |
619 | * to decide whether the application should be woken up. | |
620 | * If not set, we use rs_cong_track to find out whether a cong map | |
621 | * update arrived. | |
622 | */ | |
623 | uint64_t rs_cong_mask; | |
624 | uint64_t rs_cong_notify; | |
625 | struct list_head rs_cong_list; | |
626 | unsigned long rs_cong_track; | |
627 | ||
628 | /* | |
629 | * rs_recv_lock protects the receive queue, and is | |
630 | * used to serialize with rds_release. | |
631 | */ | |
632 | rwlock_t rs_recv_lock; | |
633 | struct list_head rs_recv_queue; | |
634 | ||
635 | /* just for stats reporting */ | |
636 | struct list_head rs_item; | |
637 | ||
638 | /* these have their own lock */ | |
639 | spinlock_t rs_rdma_lock; | |
640 | struct rb_root rs_rdma_keys; | |
641 | ||
642 | /* Socket options - in case there will be more */ | |
643 | unsigned char rs_recverr, | |
644 | rs_cong_monitor; | |
5916e2c1 | 645 | u32 rs_hash_initval; |
3289025a SS |
646 | |
647 | /* Socket receive path trace points*/ | |
648 | u8 rs_rx_traces; | |
649 | u8 rs_rx_trace[RDS_MSG_RX_DGRAM_TRACE_MAX]; | |
9426bbc6 | 650 | struct rds_msg_zcopy_queue rs_zcookie_queue; |
39de8281 AG |
651 | }; |
652 | ||
653 | static inline struct rds_sock *rds_sk_to_rs(const struct sock *sk) | |
654 | { | |
655 | return container_of(sk, struct rds_sock, rs_sk); | |
656 | } | |
657 | static inline struct sock *rds_rs_to_sk(struct rds_sock *rs) | |
658 | { | |
659 | return &rs->rs_sk; | |
660 | } | |
661 | ||
662 | /* | |
663 | * The stack assigns sk_sndbuf and sk_rcvbuf to twice the specified value | |
664 | * to account for overhead. We don't account for overhead, we just apply | |
665 | * the number of payload bytes to the specified value. | |
666 | */ | |
667 | static inline int rds_sk_sndbuf(struct rds_sock *rs) | |
668 | { | |
669 | return rds_rs_to_sk(rs)->sk_sndbuf / 2; | |
670 | } | |
671 | static inline int rds_sk_rcvbuf(struct rds_sock *rs) | |
672 | { | |
673 | return rds_rs_to_sk(rs)->sk_rcvbuf / 2; | |
674 | } | |
675 | ||
676 | struct rds_statistics { | |
677 | uint64_t s_conn_reset; | |
678 | uint64_t s_recv_drop_bad_checksum; | |
679 | uint64_t s_recv_drop_old_seq; | |
680 | uint64_t s_recv_drop_no_sock; | |
681 | uint64_t s_recv_drop_dead_sock; | |
682 | uint64_t s_recv_deliver_raced; | |
683 | uint64_t s_recv_delivered; | |
684 | uint64_t s_recv_queued; | |
685 | uint64_t s_recv_immediate_retry; | |
686 | uint64_t s_recv_delayed_retry; | |
687 | uint64_t s_recv_ack_required; | |
688 | uint64_t s_recv_rdma_bytes; | |
689 | uint64_t s_recv_ping; | |
690 | uint64_t s_send_queue_empty; | |
691 | uint64_t s_send_queue_full; | |
049ee3f5 AG |
692 | uint64_t s_send_lock_contention; |
693 | uint64_t s_send_lock_queue_raced; | |
39de8281 AG |
694 | uint64_t s_send_immediate_retry; |
695 | uint64_t s_send_delayed_retry; | |
696 | uint64_t s_send_drop_acked; | |
697 | uint64_t s_send_ack_required; | |
698 | uint64_t s_send_queued; | |
699 | uint64_t s_send_rdma; | |
700 | uint64_t s_send_rdma_bytes; | |
701 | uint64_t s_send_pong; | |
702 | uint64_t s_page_remainder_hit; | |
703 | uint64_t s_page_remainder_miss; | |
704 | uint64_t s_copy_to_user; | |
705 | uint64_t s_copy_from_user; | |
706 | uint64_t s_cong_update_queued; | |
707 | uint64_t s_cong_update_received; | |
708 | uint64_t s_cong_send_error; | |
709 | uint64_t s_cong_send_blocked; | |
192a798f VV |
710 | uint64_t s_recv_bytes_added_to_socket; |
711 | uint64_t s_recv_bytes_removed_from_socket; | |
712 | ||
39de8281 AG |
713 | }; |
714 | ||
715 | /* af_rds.c */ | |
716 | void rds_sock_addref(struct rds_sock *rs); | |
717 | void rds_sock_put(struct rds_sock *rs); | |
718 | void rds_wake_sk_sleep(struct rds_sock *rs); | |
719 | static inline void __rds_wake_sk_sleep(struct sock *sk) | |
720 | { | |
aa395145 | 721 | wait_queue_head_t *waitq = sk_sleep(sk); |
39de8281 AG |
722 | |
723 | if (!sock_flag(sk, SOCK_DEAD) && waitq) | |
724 | wake_up(waitq); | |
725 | } | |
726 | extern wait_queue_head_t rds_poll_waitq; | |
727 | ||
728 | ||
729 | /* bind.c */ | |
730 | int rds_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len); | |
731 | void rds_remove_bound(struct rds_sock *rs); | |
eee2fa6a KCP |
732 | struct rds_sock *rds_find_bound(const struct in6_addr *addr, __be16 port, |
733 | __u32 scope_id); | |
7b565434 | 734 | int rds_bind_lock_init(void); |
735 | void rds_bind_lock_destroy(void); | |
39de8281 AG |
736 | |
737 | /* cong.c */ | |
738 | int rds_cong_get_maps(struct rds_connection *conn); | |
739 | void rds_cong_add_conn(struct rds_connection *conn); | |
740 | void rds_cong_remove_conn(struct rds_connection *conn); | |
741 | void rds_cong_set_bit(struct rds_cong_map *map, __be16 port); | |
742 | void rds_cong_clear_bit(struct rds_cong_map *map, __be16 port); | |
743 | int rds_cong_wait(struct rds_cong_map *map, __be16 port, int nonblock, struct rds_sock *rs); | |
744 | void rds_cong_queue_updates(struct rds_cong_map *map); | |
745 | void rds_cong_map_updated(struct rds_cong_map *map, uint64_t); | |
746 | int rds_cong_updated_since(unsigned long *recent); | |
747 | void rds_cong_add_socket(struct rds_sock *); | |
748 | void rds_cong_remove_socket(struct rds_sock *); | |
749 | void rds_cong_exit(void); | |
750 | struct rds_message *rds_cong_update_alloc(struct rds_connection *conn); | |
751 | ||
1e2b44e7 | 752 | /* connection.c */ |
905dd418 | 753 | extern u32 rds_gen_num; |
ef87b7ea | 754 | int rds_conn_init(void); |
39de8281 | 755 | void rds_conn_exit(void); |
d5a8ac28 | 756 | struct rds_connection *rds_conn_create(struct net *net, |
eee2fa6a KCP |
757 | const struct in6_addr *laddr, |
758 | const struct in6_addr *faddr, | |
759 | struct rds_transport *trans, gfp_t gfp, | |
760 | int dev_if); | |
d5a8ac28 | 761 | struct rds_connection *rds_conn_create_outgoing(struct net *net, |
eee2fa6a KCP |
762 | const struct in6_addr *laddr, |
763 | const struct in6_addr *faddr, | |
764 | struct rds_transport *trans, | |
765 | gfp_t gfp, int dev_if); | |
d769ef81 | 766 | void rds_conn_shutdown(struct rds_conn_path *cpath); |
39de8281 | 767 | void rds_conn_destroy(struct rds_connection *conn); |
39de8281 | 768 | void rds_conn_drop(struct rds_connection *conn); |
aed20a53 | 769 | void rds_conn_path_drop(struct rds_conn_path *cpath, bool destroy); |
f3c6808d | 770 | void rds_conn_connect_if_down(struct rds_connection *conn); |
3c0a5900 | 771 | void rds_conn_path_connect_if_down(struct rds_conn_path *cp); |
39de8281 AG |
772 | void rds_for_each_conn_info(struct socket *sock, unsigned int len, |
773 | struct rds_info_iterator *iter, | |
774 | struct rds_info_lengths *lens, | |
775 | int (*visitor)(struct rds_connection *, void *), | |
f1cb9d68 | 776 | u64 *buffer, |
39de8281 | 777 | size_t item_len); |
39de8281 | 778 | |
6cdaf03f | 779 | __printf(2, 3) |
fb1b3dc4 SV |
780 | void __rds_conn_path_error(struct rds_conn_path *cp, const char *, ...); |
781 | #define rds_conn_path_error(cp, fmt...) \ | |
782 | __rds_conn_path_error(cp, KERN_WARNING "RDS: " fmt) | |
783 | ||
0cb43965 SV |
784 | static inline int |
785 | rds_conn_path_transition(struct rds_conn_path *cp, int old, int new) | |
786 | { | |
787 | return atomic_cmpxchg(&cp->cp_state, old, new) == old; | |
788 | } | |
789 | ||
39de8281 AG |
790 | static inline int |
791 | rds_conn_transition(struct rds_connection *conn, int old, int new) | |
792 | { | |
7e8f4413 | 793 | WARN_ON(conn->c_trans->t_mp_capable); |
0cb43965 SV |
794 | return rds_conn_path_transition(&conn->c_path[0], old, new); |
795 | } | |
796 | ||
797 | static inline int | |
798 | rds_conn_path_state(struct rds_conn_path *cp) | |
799 | { | |
800 | return atomic_read(&cp->cp_state); | |
39de8281 AG |
801 | } |
802 | ||
803 | static inline int | |
804 | rds_conn_state(struct rds_connection *conn) | |
805 | { | |
7e8f4413 | 806 | WARN_ON(conn->c_trans->t_mp_capable); |
0cb43965 SV |
807 | return rds_conn_path_state(&conn->c_path[0]); |
808 | } | |
809 | ||
810 | static inline int | |
811 | rds_conn_path_up(struct rds_conn_path *cp) | |
812 | { | |
813 | return atomic_read(&cp->cp_state) == RDS_CONN_UP; | |
39de8281 AG |
814 | } |
815 | ||
816 | static inline int | |
817 | rds_conn_up(struct rds_connection *conn) | |
818 | { | |
7e8f4413 | 819 | WARN_ON(conn->c_trans->t_mp_capable); |
0cb43965 SV |
820 | return rds_conn_path_up(&conn->c_path[0]); |
821 | } | |
822 | ||
823 | static inline int | |
824 | rds_conn_path_connecting(struct rds_conn_path *cp) | |
825 | { | |
826 | return atomic_read(&cp->cp_state) == RDS_CONN_CONNECTING; | |
39de8281 AG |
827 | } |
828 | ||
829 | static inline int | |
830 | rds_conn_connecting(struct rds_connection *conn) | |
831 | { | |
7e8f4413 | 832 | WARN_ON(conn->c_trans->t_mp_capable); |
0cb43965 | 833 | return rds_conn_path_connecting(&conn->c_path[0]); |
39de8281 AG |
834 | } |
835 | ||
836 | /* message.c */ | |
837 | struct rds_message *rds_message_alloc(unsigned int nents, gfp_t gfp); | |
c75ab8a5 | 838 | struct scatterlist *rds_message_alloc_sgs(struct rds_message *rm, int nents, |
839 | int *ret); | |
0cebacce SV |
840 | int rds_message_copy_from_user(struct rds_message *rm, struct iov_iter *from, |
841 | bool zcopy); | |
39de8281 AG |
842 | struct rds_message *rds_message_map_pages(unsigned long *page_addrs, unsigned int total_len); |
843 | void rds_message_populate_header(struct rds_header *hdr, __be16 sport, | |
844 | __be16 dport, u64 seq); | |
845 | int rds_message_add_extension(struct rds_header *hdr, | |
846 | unsigned int type, const void *data, unsigned int len); | |
847 | int rds_message_next_extension(struct rds_header *hdr, | |
848 | unsigned int *pos, void *buf, unsigned int *buflen); | |
39de8281 | 849 | int rds_message_add_rdma_dest_extension(struct rds_header *hdr, u32 r_key, u32 offset); |
c310e72c | 850 | int rds_message_inc_copy_to_user(struct rds_incoming *inc, struct iov_iter *to); |
39de8281 AG |
851 | void rds_message_inc_free(struct rds_incoming *inc); |
852 | void rds_message_addref(struct rds_message *rm); | |
853 | void rds_message_put(struct rds_message *rm); | |
854 | void rds_message_wait(struct rds_message *rm); | |
855 | void rds_message_unmapped(struct rds_message *rm); | |
9426bbc6 | 856 | void rds_notify_msg_zcopy_purge(struct rds_msg_zcopy_queue *info); |
39de8281 AG |
857 | |
858 | static inline void rds_message_make_checksum(struct rds_header *hdr) | |
859 | { | |
860 | hdr->h_csum = 0; | |
861 | hdr->h_csum = ip_fast_csum((void *) hdr, sizeof(*hdr) >> 2); | |
862 | } | |
863 | ||
864 | static inline int rds_message_verify_checksum(const struct rds_header *hdr) | |
865 | { | |
866 | return !hdr->h_csum || ip_fast_csum((void *) hdr, sizeof(*hdr) >> 2) == 0; | |
867 | } | |
868 | ||
869 | ||
870 | /* page.c */ | |
871 | int rds_page_remainder_alloc(struct scatterlist *scat, unsigned long bytes, | |
872 | gfp_t gfp); | |
39de8281 AG |
873 | void rds_page_exit(void); |
874 | ||
875 | /* recv.c */ | |
876 | void rds_inc_init(struct rds_incoming *inc, struct rds_connection *conn, | |
eee2fa6a | 877 | struct in6_addr *saddr); |
5e833e02 | 878 | void rds_inc_path_init(struct rds_incoming *inc, struct rds_conn_path *conn, |
eee2fa6a | 879 | struct in6_addr *saddr); |
39de8281 | 880 | void rds_inc_put(struct rds_incoming *inc); |
eee2fa6a KCP |
881 | void rds_recv_incoming(struct rds_connection *conn, struct in6_addr *saddr, |
882 | struct in6_addr *daddr, | |
6114eab5 | 883 | struct rds_incoming *inc, gfp_t gfp); |
1b784140 YX |
884 | int rds_recvmsg(struct socket *sock, struct msghdr *msg, size_t size, |
885 | int msg_flags); | |
39de8281 AG |
886 | void rds_clear_recv_queue(struct rds_sock *rs); |
887 | int rds_notify_queue_get(struct rds_sock *rs, struct msghdr *msg); | |
888 | void rds_inc_info_copy(struct rds_incoming *inc, | |
889 | struct rds_info_iterator *iter, | |
890 | __be32 saddr, __be32 daddr, int flip); | |
1e2b44e7 KCP |
891 | void rds6_inc_info_copy(struct rds_incoming *inc, |
892 | struct rds_info_iterator *iter, | |
893 | struct in6_addr *saddr, struct in6_addr *daddr, | |
894 | int flip); | |
39de8281 AG |
895 | |
896 | /* send.c */ | |
1b784140 | 897 | int rds_sendmsg(struct socket *sock, struct msghdr *msg, size_t payload_len); |
d769ef81 | 898 | void rds_send_path_reset(struct rds_conn_path *conn); |
1f9ecd7e | 899 | int rds_send_xmit(struct rds_conn_path *cp); |
39de8281 | 900 | struct sockaddr_in; |
eee2fa6a | 901 | void rds_send_drop_to(struct rds_sock *rs, struct sockaddr_in6 *dest); |
39de8281 AG |
902 | typedef int (*is_acked_func)(struct rds_message *rm, uint64_t ack); |
903 | void rds_send_drop_acked(struct rds_connection *conn, u64 ack, | |
904 | is_acked_func is_acked); | |
5c3d274c SV |
905 | void rds_send_path_drop_acked(struct rds_conn_path *cp, u64 ack, |
906 | is_acked_func is_acked); | |
69b92b5b | 907 | void rds_send_ping(struct rds_connection *conn, int cp_index); |
45997e9e | 908 | int rds_send_pong(struct rds_conn_path *cp, __be16 dport); |
39de8281 AG |
909 | |
910 | /* rdma.c */ | |
911 | void rds_rdma_unuse(struct rds_sock *rs, u32 r_key, int force); | |
21f79afa AG |
912 | int rds_get_mr(struct rds_sock *rs, char __user *optval, int optlen); |
913 | int rds_get_mr_for_dest(struct rds_sock *rs, char __user *optval, int optlen); | |
914 | int rds_free_mr(struct rds_sock *rs, char __user *optval, int optlen); | |
915 | void rds_rdma_drop_keys(struct rds_sock *rs); | |
ea010070 | 916 | int rds_rdma_extra_size(struct rds_rdma_args *args, |
917 | struct rds_iov_vector *iov); | |
21f79afa AG |
918 | int rds_cmsg_rdma_dest(struct rds_sock *rs, struct rds_message *rm, |
919 | struct cmsghdr *cmsg); | |
920 | int rds_cmsg_rdma_args(struct rds_sock *rs, struct rds_message *rm, | |
ea010070 | 921 | struct cmsghdr *cmsg, |
922 | struct rds_iov_vector *vec); | |
21f79afa AG |
923 | int rds_cmsg_rdma_map(struct rds_sock *rs, struct rds_message *rm, |
924 | struct cmsghdr *cmsg); | |
f8b3aaf2 | 925 | void rds_rdma_free_op(struct rm_rdma_op *ro); |
d0ab25a8 | 926 | void rds_atomic_free_op(struct rm_atomic_op *ao); |
15133f6e AG |
927 | void rds_rdma_send_complete(struct rds_message *rm, int wc_status); |
928 | void rds_atomic_send_complete(struct rds_message *rm, int wc_status); | |
929 | int rds_cmsg_atomic(struct rds_sock *rs, struct rds_message *rm, | |
930 | struct cmsghdr *cmsg); | |
21f79afa | 931 | |
c1b1203d | 932 | void __rds_put_mr_final(struct rds_mr *mr); |
21f79afa AG |
933 | static inline void rds_mr_put(struct rds_mr *mr) |
934 | { | |
803ea850 | 935 | if (refcount_dec_and_test(&mr->r_refcount)) |
21f79afa AG |
936 | __rds_put_mr_final(mr); |
937 | } | |
39de8281 | 938 | |
ebeeb1ad SV |
939 | static inline bool rds_destroy_pending(struct rds_connection *conn) |
940 | { | |
941 | return !check_net(rds_conn_net(conn)) || | |
942 | (conn->c_trans->t_unloading && conn->c_trans->t_unloading(conn)); | |
943 | } | |
944 | ||
39de8281 | 945 | /* stats.c */ |
9b8de747 | 946 | DECLARE_PER_CPU_SHARED_ALIGNED(struct rds_statistics, rds_stats); |
39de8281 AG |
947 | #define rds_stats_inc_which(which, member) do { \ |
948 | per_cpu(which, get_cpu()).member++; \ | |
949 | put_cpu(); \ | |
950 | } while (0) | |
951 | #define rds_stats_inc(member) rds_stats_inc_which(rds_stats, member) | |
952 | #define rds_stats_add_which(which, member, count) do { \ | |
953 | per_cpu(which, get_cpu()).member += count; \ | |
954 | put_cpu(); \ | |
955 | } while (0) | |
956 | #define rds_stats_add(member, count) rds_stats_add_which(rds_stats, member, count) | |
ef87b7ea | 957 | int rds_stats_init(void); |
39de8281 AG |
958 | void rds_stats_exit(void); |
959 | void rds_stats_info_copy(struct rds_info_iterator *iter, | |
36cbd3dc JE |
960 | uint64_t *values, const char *const *names, |
961 | size_t nr); | |
39de8281 AG |
962 | |
963 | /* sysctl.c */ | |
ef87b7ea | 964 | int rds_sysctl_init(void); |
39de8281 AG |
965 | void rds_sysctl_exit(void); |
966 | extern unsigned long rds_sysctl_sndbuf_min; | |
967 | extern unsigned long rds_sysctl_sndbuf_default; | |
968 | extern unsigned long rds_sysctl_sndbuf_max; | |
969 | extern unsigned long rds_sysctl_reconnect_min_jiffies; | |
970 | extern unsigned long rds_sysctl_reconnect_max_jiffies; | |
971 | extern unsigned int rds_sysctl_max_unacked_packets; | |
972 | extern unsigned int rds_sysctl_max_unacked_bytes; | |
973 | extern unsigned int rds_sysctl_ping_enable; | |
974 | extern unsigned long rds_sysctl_trace_flags; | |
975 | extern unsigned int rds_sysctl_trace_level; | |
976 | ||
977 | /* threads.c */ | |
ef87b7ea | 978 | int rds_threads_init(void); |
39de8281 AG |
979 | void rds_threads_exit(void); |
980 | extern struct workqueue_struct *rds_wq; | |
0cb43965 | 981 | void rds_queue_reconnect(struct rds_conn_path *cp); |
39de8281 AG |
982 | void rds_connect_worker(struct work_struct *); |
983 | void rds_shutdown_worker(struct work_struct *); | |
984 | void rds_send_worker(struct work_struct *); | |
985 | void rds_recv_worker(struct work_struct *); | |
0cb43965 | 986 | void rds_connect_path_complete(struct rds_conn_path *conn, int curr); |
39de8281 | 987 | void rds_connect_complete(struct rds_connection *conn); |
eee2fa6a | 988 | int rds_addr_cmp(const struct in6_addr *a1, const struct in6_addr *a2); |
39de8281 AG |
989 | |
990 | /* transport.c */ | |
a8d63a53 | 991 | void rds_trans_register(struct rds_transport *trans); |
39de8281 | 992 | void rds_trans_unregister(struct rds_transport *trans); |
eee2fa6a KCP |
993 | struct rds_transport *rds_trans_get_preferred(struct net *net, |
994 | const struct in6_addr *addr, | |
995 | __u32 scope_id); | |
5adb5bc6 | 996 | void rds_trans_put(struct rds_transport *trans); |
39de8281 AG |
997 | unsigned int rds_trans_stats_info_copy(struct rds_info_iterator *iter, |
998 | unsigned int avail); | |
d97dac54 | 999 | struct rds_transport *rds_trans_get(int t_type); |
ef87b7ea | 1000 | int rds_trans_init(void); |
39de8281 AG |
1001 | void rds_trans_exit(void); |
1002 | ||
1003 | #endif |