Commit | Line | Data |
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39de8281 AG |
1 | #ifndef _RDS_RDS_H |
2 | #define _RDS_RDS_H | |
3 | ||
4 | #include <net/sock.h> | |
5 | #include <linux/scatterlist.h> | |
6 | #include <linux/highmem.h> | |
7 | #include <rdma/rdma_cm.h> | |
8 | #include <linux/mutex.h> | |
9 | #include <linux/rds.h> | |
7b565434 | 10 | #include <linux/rhashtable.h> |
39de8281 AG |
11 | |
12 | #include "info.h" | |
13 | ||
14 | /* | |
15 | * RDS Network protocol version | |
16 | */ | |
17 | #define RDS_PROTOCOL_3_0 0x0300 | |
18 | #define RDS_PROTOCOL_3_1 0x0301 | |
19 | #define RDS_PROTOCOL_VERSION RDS_PROTOCOL_3_1 | |
20 | #define RDS_PROTOCOL_MAJOR(v) ((v) >> 8) | |
21 | #define RDS_PROTOCOL_MINOR(v) ((v) & 255) | |
22 | #define RDS_PROTOCOL(maj, min) (((maj) << 8) | min) | |
23 | ||
24 | /* | |
25 | * XXX randomly chosen, but at least seems to be unused: | |
26 | * # 18464-18768 Unassigned | |
27 | * We should do better. We want a reserved port to discourage unpriv'ed | |
28 | * userspace from listening. | |
29 | */ | |
30 | #define RDS_PORT 18634 | |
31 | ||
8cbd9606 AG |
32 | #ifdef ATOMIC64_INIT |
33 | #define KERNEL_HAS_ATOMIC64 | |
34 | #endif | |
35 | ||
39de8281 AG |
36 | #ifdef DEBUG |
37 | #define rdsdebug(fmt, args...) pr_debug("%s(): " fmt, __func__ , ##args) | |
38 | #else | |
39 | /* sigh, pr_debug() causes unused variable warnings */ | |
b9075fa9 JP |
40 | static inline __printf(1, 2) |
41 | void rdsdebug(char *fmt, ...) | |
39de8281 AG |
42 | { |
43 | } | |
44 | #endif | |
45 | ||
46 | /* XXX is there one of these somewhere? */ | |
47 | #define ceil(x, y) \ | |
48 | ({ unsigned long __x = (x), __y = (y); (__x + __y - 1) / __y; }) | |
49 | ||
50 | #define RDS_FRAG_SHIFT 12 | |
51 | #define RDS_FRAG_SIZE ((unsigned int)(1 << RDS_FRAG_SHIFT)) | |
52 | ||
53 | #define RDS_CONG_MAP_BYTES (65536 / 8) | |
39de8281 AG |
54 | #define RDS_CONG_MAP_PAGES (PAGE_ALIGN(RDS_CONG_MAP_BYTES) / PAGE_SIZE) |
55 | #define RDS_CONG_MAP_PAGE_BITS (PAGE_SIZE * 8) | |
56 | ||
57 | struct rds_cong_map { | |
58 | struct rb_node m_rb_node; | |
59 | __be32 m_addr; | |
60 | wait_queue_head_t m_waitq; | |
61 | struct list_head m_conn_list; | |
62 | unsigned long m_page_addrs[RDS_CONG_MAP_PAGES]; | |
63 | }; | |
64 | ||
65 | ||
66 | /* | |
67 | * This is how we will track the connection state: | |
68 | * A connection is always in one of the following | |
69 | * states. Updates to the state are atomic and imply | |
70 | * a memory barrier. | |
71 | */ | |
72 | enum { | |
73 | RDS_CONN_DOWN = 0, | |
74 | RDS_CONN_CONNECTING, | |
75 | RDS_CONN_DISCONNECTING, | |
76 | RDS_CONN_UP, | |
77 | RDS_CONN_ERROR, | |
78 | }; | |
79 | ||
80 | /* Bits for c_flags */ | |
81 | #define RDS_LL_SEND_FULL 0 | |
82 | #define RDS_RECONNECT_PENDING 1 | |
0f4b1c7e | 83 | #define RDS_IN_XMIT 2 |
73ce4317 | 84 | #define RDS_RECV_REFILL 3 |
39de8281 AG |
85 | |
86 | struct rds_connection { | |
87 | struct hlist_node c_hash_node; | |
88 | __be32 c_laddr; | |
89 | __be32 c_faddr; | |
3b20fc38 SV |
90 | unsigned int c_loopback:1, |
91 | c_outgoing:1, | |
92 | c_pad_to_32:30; | |
39de8281 AG |
93 | struct rds_connection *c_passive; |
94 | ||
95 | struct rds_cong_map *c_lcong; | |
96 | struct rds_cong_map *c_fcong; | |
97 | ||
39de8281 AG |
98 | struct rds_message *c_xmit_rm; |
99 | unsigned long c_xmit_sg; | |
100 | unsigned int c_xmit_hdr_off; | |
101 | unsigned int c_xmit_data_off; | |
15133f6e | 102 | unsigned int c_xmit_atomic_sent; |
5b2366bd AG |
103 | unsigned int c_xmit_rdma_sent; |
104 | unsigned int c_xmit_data_sent; | |
39de8281 AG |
105 | |
106 | spinlock_t c_lock; /* protect msg queues */ | |
107 | u64 c_next_tx_seq; | |
108 | struct list_head c_send_queue; | |
109 | struct list_head c_retrans; | |
110 | ||
111 | u64 c_next_rx_seq; | |
112 | ||
113 | struct rds_transport *c_trans; | |
114 | void *c_transport_data; | |
115 | ||
116 | atomic_t c_state; | |
443be0e5 | 117 | unsigned long c_send_gen; |
39de8281 AG |
118 | unsigned long c_flags; |
119 | unsigned long c_reconnect_jiffies; | |
120 | struct delayed_work c_send_w; | |
121 | struct delayed_work c_recv_w; | |
122 | struct delayed_work c_conn_w; | |
123 | struct work_struct c_down_w; | |
124 | struct mutex c_cm_lock; /* protect conn state & cm */ | |
0f4b1c7e | 125 | wait_queue_head_t c_waitq; |
39de8281 AG |
126 | |
127 | struct list_head c_map_item; | |
128 | unsigned long c_map_queued; | |
39de8281 AG |
129 | |
130 | unsigned int c_unacked_packets; | |
131 | unsigned int c_unacked_bytes; | |
132 | ||
133 | /* Protocol version */ | |
134 | unsigned int c_version; | |
d5a8ac28 | 135 | possible_net_t c_net; |
39de8281 AG |
136 | }; |
137 | ||
d5a8ac28 SV |
138 | static inline |
139 | struct net *rds_conn_net(struct rds_connection *conn) | |
140 | { | |
141 | return read_pnet(&conn->c_net); | |
142 | } | |
143 | ||
144 | static inline | |
145 | void rds_conn_net_set(struct rds_connection *conn, struct net *net) | |
146 | { | |
147 | write_pnet(&conn->c_net, net); | |
148 | } | |
149 | ||
39de8281 AG |
150 | #define RDS_FLAG_CONG_BITMAP 0x01 |
151 | #define RDS_FLAG_ACK_REQUIRED 0x02 | |
152 | #define RDS_FLAG_RETRANSMITTED 0x04 | |
7b70d033 | 153 | #define RDS_MAX_ADV_CREDIT 255 |
39de8281 AG |
154 | |
155 | /* | |
156 | * Maximum space available for extension headers. | |
157 | */ | |
158 | #define RDS_HEADER_EXT_SPACE 16 | |
159 | ||
160 | struct rds_header { | |
161 | __be64 h_sequence; | |
162 | __be64 h_ack; | |
163 | __be32 h_len; | |
164 | __be16 h_sport; | |
165 | __be16 h_dport; | |
166 | u8 h_flags; | |
167 | u8 h_credit; | |
168 | u8 h_padding[4]; | |
169 | __sum16 h_csum; | |
170 | ||
171 | u8 h_exthdr[RDS_HEADER_EXT_SPACE]; | |
172 | }; | |
173 | ||
174 | /* | |
175 | * Reserved - indicates end of extensions | |
176 | */ | |
177 | #define RDS_EXTHDR_NONE 0 | |
178 | ||
179 | /* | |
180 | * This extension header is included in the very | |
181 | * first message that is sent on a new connection, | |
182 | * and identifies the protocol level. This will help | |
183 | * rolling updates if a future change requires breaking | |
184 | * the protocol. | |
185 | * NB: This is no longer true for IB, where we do a version | |
186 | * negotiation during the connection setup phase (protocol | |
187 | * version information is included in the RDMA CM private data). | |
188 | */ | |
189 | #define RDS_EXTHDR_VERSION 1 | |
190 | struct rds_ext_header_version { | |
191 | __be32 h_version; | |
192 | }; | |
193 | ||
194 | /* | |
195 | * This extension header is included in the RDS message | |
196 | * chasing an RDMA operation. | |
197 | */ | |
198 | #define RDS_EXTHDR_RDMA 2 | |
199 | struct rds_ext_header_rdma { | |
200 | __be32 h_rdma_rkey; | |
201 | }; | |
202 | ||
203 | /* | |
204 | * This extension header tells the peer about the | |
205 | * destination <R_Key,offset> of the requested RDMA | |
206 | * operation. | |
207 | */ | |
208 | #define RDS_EXTHDR_RDMA_DEST 3 | |
209 | struct rds_ext_header_rdma_dest { | |
210 | __be32 h_rdma_rkey; | |
211 | __be32 h_rdma_offset; | |
212 | }; | |
213 | ||
214 | #define __RDS_EXTHDR_MAX 16 /* for now */ | |
215 | ||
216 | struct rds_incoming { | |
217 | atomic_t i_refcount; | |
218 | struct list_head i_item; | |
219 | struct rds_connection *i_conn; | |
220 | struct rds_header i_hdr; | |
221 | unsigned long i_rx_jiffies; | |
222 | __be32 i_saddr; | |
223 | ||
224 | rds_rdma_cookie_t i_rdma_cookie; | |
5711f8b3 | 225 | struct timeval i_rx_tstamp; |
39de8281 AG |
226 | }; |
227 | ||
21f79afa AG |
228 | struct rds_mr { |
229 | struct rb_node r_rb_node; | |
230 | atomic_t r_refcount; | |
231 | u32 r_key; | |
232 | ||
233 | /* A copy of the creation flags */ | |
234 | unsigned int r_use_once:1; | |
235 | unsigned int r_invalidate:1; | |
236 | unsigned int r_write:1; | |
237 | ||
238 | /* This is for RDS_MR_DEAD. | |
239 | * It would be nice & consistent to make this part of the above | |
240 | * bit field here, but we need to use test_and_set_bit. | |
241 | */ | |
242 | unsigned long r_state; | |
243 | struct rds_sock *r_sock; /* back pointer to the socket that owns us */ | |
244 | struct rds_transport *r_trans; | |
245 | void *r_trans_private; | |
246 | }; | |
247 | ||
248 | /* Flags for mr->r_state */ | |
249 | #define RDS_MR_DEAD 0 | |
250 | ||
21f79afa AG |
251 | static inline rds_rdma_cookie_t rds_rdma_make_cookie(u32 r_key, u32 offset) |
252 | { | |
253 | return r_key | (((u64) offset) << 32); | |
254 | } | |
255 | ||
256 | static inline u32 rds_rdma_cookie_key(rds_rdma_cookie_t cookie) | |
257 | { | |
258 | return cookie; | |
259 | } | |
260 | ||
261 | static inline u32 rds_rdma_cookie_offset(rds_rdma_cookie_t cookie) | |
262 | { | |
263 | return cookie >> 32; | |
264 | } | |
265 | ||
15133f6e AG |
266 | /* atomic operation types */ |
267 | #define RDS_ATOMIC_TYPE_CSWP 0 | |
268 | #define RDS_ATOMIC_TYPE_FADD 1 | |
269 | ||
39de8281 AG |
270 | /* |
271 | * m_sock_item and m_conn_item are on lists that are serialized under | |
272 | * conn->c_lock. m_sock_item has additional meaning in that once it is empty | |
273 | * the message will not be put back on the retransmit list after being sent. | |
274 | * messages that are canceled while being sent rely on this. | |
275 | * | |
276 | * m_inc is used by loopback so that it can pass an incoming message straight | |
277 | * back up into the rx path. It embeds a wire header which is also used by | |
278 | * the send path, which is kind of awkward. | |
279 | * | |
280 | * m_sock_item indicates the message's presence on a socket's send or receive | |
281 | * queue. m_rs will point to that socket. | |
282 | * | |
283 | * m_daddr is used by cancellation to prune messages to a given destination. | |
284 | * | |
285 | * The RDS_MSG_ON_SOCK and RDS_MSG_ON_CONN flags are used to avoid lock | |
286 | * nesting. As paths iterate over messages on a sock, or conn, they must | |
287 | * also lock the conn, or sock, to remove the message from those lists too. | |
288 | * Testing the flag to determine if the message is still on the lists lets | |
289 | * us avoid testing the list_head directly. That means each path can use | |
290 | * the message's list_head to keep it on a local list while juggling locks | |
291 | * without confusing the other path. | |
292 | * | |
293 | * m_ack_seq is an optional field set by transports who need a different | |
294 | * sequence number range to invalidate. They can use this in a callback | |
295 | * that they pass to rds_send_drop_acked() to see if each message has been | |
296 | * acked. The HAS_ACK_SEQ flag can be used to detect messages which haven't | |
297 | * had ack_seq set yet. | |
298 | */ | |
299 | #define RDS_MSG_ON_SOCK 1 | |
300 | #define RDS_MSG_ON_CONN 2 | |
301 | #define RDS_MSG_HAS_ACK_SEQ 3 | |
302 | #define RDS_MSG_ACK_REQUIRED 4 | |
303 | #define RDS_MSG_RETRANSMITTED 5 | |
304 | #define RDS_MSG_MAPPED 6 | |
305 | #define RDS_MSG_PAGEVEC 7 | |
306 | ||
307 | struct rds_message { | |
308 | atomic_t m_refcount; | |
309 | struct list_head m_sock_item; | |
310 | struct list_head m_conn_item; | |
311 | struct rds_incoming m_inc; | |
312 | u64 m_ack_seq; | |
313 | __be32 m_daddr; | |
314 | unsigned long m_flags; | |
315 | ||
316 | /* Never access m_rs without holding m_rs_lock. | |
317 | * Lock nesting is | |
318 | * rm->m_rs_lock | |
319 | * -> rs->rs_lock | |
320 | */ | |
321 | spinlock_t m_rs_lock; | |
c83188dc CM |
322 | wait_queue_head_t m_flush_wait; |
323 | ||
39de8281 | 324 | struct rds_sock *m_rs; |
7e3bd65e AG |
325 | |
326 | /* cookie to send to remote, in rds header */ | |
39de8281 | 327 | rds_rdma_cookie_t m_rdma_cookie; |
7e3bd65e AG |
328 | |
329 | unsigned int m_used_sgs; | |
330 | unsigned int m_total_sgs; | |
331 | ||
ff3d7d36 AG |
332 | void *m_final_op; |
333 | ||
e779137a | 334 | struct { |
15133f6e AG |
335 | struct rm_atomic_op { |
336 | int op_type; | |
20c72bd5 AG |
337 | union { |
338 | struct { | |
339 | uint64_t compare; | |
340 | uint64_t swap; | |
341 | uint64_t compare_mask; | |
342 | uint64_t swap_mask; | |
343 | } op_m_cswp; | |
344 | struct { | |
345 | uint64_t add; | |
346 | uint64_t nocarry_mask; | |
347 | } op_m_fadd; | |
348 | }; | |
15133f6e AG |
349 | |
350 | u32 op_rkey; | |
351 | u64 op_remote_addr; | |
352 | unsigned int op_notify:1; | |
353 | unsigned int op_recverr:1; | |
354 | unsigned int op_mapped:1; | |
2c3a5f9a | 355 | unsigned int op_silent:1; |
15133f6e | 356 | unsigned int op_active:1; |
15133f6e | 357 | struct scatterlist *op_sg; |
f8b3aaf2 | 358 | struct rds_notifier *op_notifier; |
15133f6e AG |
359 | |
360 | struct rds_mr *op_rdma_mr; | |
361 | } atomic; | |
362 | struct rm_rdma_op { | |
f8b3aaf2 AG |
363 | u32 op_rkey; |
364 | u64 op_remote_addr; | |
365 | unsigned int op_write:1; | |
366 | unsigned int op_fence:1; | |
367 | unsigned int op_notify:1; | |
368 | unsigned int op_recverr:1; | |
369 | unsigned int op_mapped:1; | |
2c3a5f9a | 370 | unsigned int op_silent:1; |
f8b3aaf2 AG |
371 | unsigned int op_active:1; |
372 | unsigned int op_bytes; | |
373 | unsigned int op_nents; | |
374 | unsigned int op_count; | |
375 | struct scatterlist *op_sg; | |
376 | struct rds_notifier *op_notifier; | |
377 | ||
378 | struct rds_mr *op_rdma_mr; | |
e779137a | 379 | } rdma; |
15133f6e | 380 | struct rm_data_op { |
241eef3e | 381 | unsigned int op_active:1; |
6c7cc6e4 AG |
382 | unsigned int op_nents; |
383 | unsigned int op_count; | |
d655a9fb WW |
384 | unsigned int op_dmasg; |
385 | unsigned int op_dmaoff; | |
6c7cc6e4 | 386 | struct scatterlist *op_sg; |
e779137a AG |
387 | } data; |
388 | }; | |
39de8281 AG |
389 | }; |
390 | ||
391 | /* | |
392 | * The RDS notifier is used (optionally) to tell the application about | |
393 | * completed RDMA operations. Rather than keeping the whole rds message | |
394 | * around on the queue, we allocate a small notifier that is put on the | |
395 | * socket's notifier_list. Notifications are delivered to the application | |
396 | * through control messages. | |
397 | */ | |
398 | struct rds_notifier { | |
399 | struct list_head n_list; | |
400 | uint64_t n_user_token; | |
401 | int n_status; | |
402 | }; | |
403 | ||
404 | /** | |
405 | * struct rds_transport - transport specific behavioural hooks | |
406 | * | |
407 | * @xmit: .xmit is called by rds_send_xmit() to tell the transport to send | |
408 | * part of a message. The caller serializes on the send_sem so this | |
409 | * doesn't need to be reentrant for a given conn. The header must be | |
410 | * sent before the data payload. .xmit must be prepared to send a | |
411 | * message with no data payload. .xmit should return the number of | |
412 | * bytes that were sent down the connection, including header bytes. | |
413 | * Returning 0 tells the caller that it doesn't need to perform any | |
414 | * additional work now. This is usually the case when the transport has | |
415 | * filled the sending queue for its connection and will handle | |
416 | * triggering the rds thread to continue the send when space becomes | |
417 | * available. Returning -EAGAIN tells the caller to retry the send | |
418 | * immediately. Returning -ENOMEM tells the caller to retry the send at | |
419 | * some point in the future. | |
420 | * | |
421 | * @conn_shutdown: conn_shutdown stops traffic on the given connection. Once | |
422 | * it returns the connection can not call rds_recv_incoming(). | |
423 | * This will only be called once after conn_connect returns | |
424 | * non-zero success and will The caller serializes this with | |
425 | * the send and connecting paths (xmit_* and conn_*). The | |
426 | * transport is responsible for other serialization, including | |
427 | * rds_recv_incoming(). This is called in process context but | |
428 | * should try hard not to block. | |
39de8281 AG |
429 | */ |
430 | ||
431 | struct rds_transport { | |
432 | char t_name[TRANSNAMSIZ]; | |
433 | struct list_head t_item; | |
434 | struct module *t_owner; | |
435 | unsigned int t_prefer_loopback:1; | |
335776bd | 436 | unsigned int t_type; |
39de8281 | 437 | |
d5a8ac28 | 438 | int (*laddr_check)(struct net *net, __be32 addr); |
39de8281 AG |
439 | int (*conn_alloc)(struct rds_connection *conn, gfp_t gfp); |
440 | void (*conn_free)(void *data); | |
441 | int (*conn_connect)(struct rds_connection *conn); | |
442 | void (*conn_shutdown)(struct rds_connection *conn); | |
443 | void (*xmit_prepare)(struct rds_connection *conn); | |
444 | void (*xmit_complete)(struct rds_connection *conn); | |
445 | int (*xmit)(struct rds_connection *conn, struct rds_message *rm, | |
446 | unsigned int hdr_off, unsigned int sg, unsigned int off); | |
f8b3aaf2 | 447 | int (*xmit_rdma)(struct rds_connection *conn, struct rm_rdma_op *op); |
ff3d7d36 | 448 | int (*xmit_atomic)(struct rds_connection *conn, struct rm_atomic_op *op); |
39de8281 | 449 | int (*recv)(struct rds_connection *conn); |
c310e72c | 450 | int (*inc_copy_to_user)(struct rds_incoming *inc, struct iov_iter *to); |
39de8281 AG |
451 | void (*inc_free)(struct rds_incoming *inc); |
452 | ||
453 | int (*cm_handle_connect)(struct rdma_cm_id *cm_id, | |
454 | struct rdma_cm_event *event); | |
455 | int (*cm_initiate_connect)(struct rdma_cm_id *cm_id); | |
456 | void (*cm_connect_complete)(struct rds_connection *conn, | |
457 | struct rdma_cm_event *event); | |
458 | ||
459 | unsigned int (*stats_info_copy)(struct rds_info_iterator *iter, | |
460 | unsigned int avail); | |
461 | void (*exit)(void); | |
462 | void *(*get_mr)(struct scatterlist *sg, unsigned long nr_sg, | |
463 | struct rds_sock *rs, u32 *key_ret); | |
464 | void (*sync_mr)(void *trans_private, int direction); | |
465 | void (*free_mr)(void *trans_private, int invalidate); | |
466 | void (*flush_mrs)(void); | |
467 | }; | |
468 | ||
469 | struct rds_sock { | |
470 | struct sock rs_sk; | |
471 | ||
472 | u64 rs_user_addr; | |
473 | u64 rs_user_bytes; | |
474 | ||
475 | /* | |
476 | * bound_addr used for both incoming and outgoing, no INADDR_ANY | |
477 | * support. | |
478 | */ | |
7b565434 | 479 | struct rhash_head rs_bound_node; |
480 | u64 rs_bound_key; | |
39de8281 AG |
481 | __be32 rs_bound_addr; |
482 | __be32 rs_conn_addr; | |
483 | __be16 rs_bound_port; | |
484 | __be16 rs_conn_port; | |
39de8281 AG |
485 | struct rds_transport *rs_transport; |
486 | ||
487 | /* | |
488 | * rds_sendmsg caches the conn it used the last time around. | |
489 | * This helps avoid costly lookups. | |
490 | */ | |
491 | struct rds_connection *rs_conn; | |
492 | ||
493 | /* flag indicating we were congested or not */ | |
494 | int rs_congested; | |
b98ba52f AG |
495 | /* seen congestion (ENOBUFS) when sending? */ |
496 | int rs_seen_congestion; | |
39de8281 AG |
497 | |
498 | /* rs_lock protects all these adjacent members before the newline */ | |
499 | spinlock_t rs_lock; | |
500 | struct list_head rs_send_queue; | |
501 | u32 rs_snd_bytes; | |
502 | int rs_rcv_bytes; | |
503 | struct list_head rs_notify_queue; /* currently used for failed RDMAs */ | |
504 | ||
505 | /* Congestion wake_up. If rs_cong_monitor is set, we use cong_mask | |
506 | * to decide whether the application should be woken up. | |
507 | * If not set, we use rs_cong_track to find out whether a cong map | |
508 | * update arrived. | |
509 | */ | |
510 | uint64_t rs_cong_mask; | |
511 | uint64_t rs_cong_notify; | |
512 | struct list_head rs_cong_list; | |
513 | unsigned long rs_cong_track; | |
514 | ||
515 | /* | |
516 | * rs_recv_lock protects the receive queue, and is | |
517 | * used to serialize with rds_release. | |
518 | */ | |
519 | rwlock_t rs_recv_lock; | |
520 | struct list_head rs_recv_queue; | |
521 | ||
522 | /* just for stats reporting */ | |
523 | struct list_head rs_item; | |
524 | ||
525 | /* these have their own lock */ | |
526 | spinlock_t rs_rdma_lock; | |
527 | struct rb_root rs_rdma_keys; | |
528 | ||
529 | /* Socket options - in case there will be more */ | |
530 | unsigned char rs_recverr, | |
531 | rs_cong_monitor; | |
532 | }; | |
533 | ||
534 | static inline struct rds_sock *rds_sk_to_rs(const struct sock *sk) | |
535 | { | |
536 | return container_of(sk, struct rds_sock, rs_sk); | |
537 | } | |
538 | static inline struct sock *rds_rs_to_sk(struct rds_sock *rs) | |
539 | { | |
540 | return &rs->rs_sk; | |
541 | } | |
542 | ||
543 | /* | |
544 | * The stack assigns sk_sndbuf and sk_rcvbuf to twice the specified value | |
545 | * to account for overhead. We don't account for overhead, we just apply | |
546 | * the number of payload bytes to the specified value. | |
547 | */ | |
548 | static inline int rds_sk_sndbuf(struct rds_sock *rs) | |
549 | { | |
550 | return rds_rs_to_sk(rs)->sk_sndbuf / 2; | |
551 | } | |
552 | static inline int rds_sk_rcvbuf(struct rds_sock *rs) | |
553 | { | |
554 | return rds_rs_to_sk(rs)->sk_rcvbuf / 2; | |
555 | } | |
556 | ||
557 | struct rds_statistics { | |
558 | uint64_t s_conn_reset; | |
559 | uint64_t s_recv_drop_bad_checksum; | |
560 | uint64_t s_recv_drop_old_seq; | |
561 | uint64_t s_recv_drop_no_sock; | |
562 | uint64_t s_recv_drop_dead_sock; | |
563 | uint64_t s_recv_deliver_raced; | |
564 | uint64_t s_recv_delivered; | |
565 | uint64_t s_recv_queued; | |
566 | uint64_t s_recv_immediate_retry; | |
567 | uint64_t s_recv_delayed_retry; | |
568 | uint64_t s_recv_ack_required; | |
569 | uint64_t s_recv_rdma_bytes; | |
570 | uint64_t s_recv_ping; | |
571 | uint64_t s_send_queue_empty; | |
572 | uint64_t s_send_queue_full; | |
049ee3f5 AG |
573 | uint64_t s_send_lock_contention; |
574 | uint64_t s_send_lock_queue_raced; | |
39de8281 AG |
575 | uint64_t s_send_immediate_retry; |
576 | uint64_t s_send_delayed_retry; | |
577 | uint64_t s_send_drop_acked; | |
578 | uint64_t s_send_ack_required; | |
579 | uint64_t s_send_queued; | |
580 | uint64_t s_send_rdma; | |
581 | uint64_t s_send_rdma_bytes; | |
582 | uint64_t s_send_pong; | |
583 | uint64_t s_page_remainder_hit; | |
584 | uint64_t s_page_remainder_miss; | |
585 | uint64_t s_copy_to_user; | |
586 | uint64_t s_copy_from_user; | |
587 | uint64_t s_cong_update_queued; | |
588 | uint64_t s_cong_update_received; | |
589 | uint64_t s_cong_send_error; | |
590 | uint64_t s_cong_send_blocked; | |
591 | }; | |
592 | ||
593 | /* af_rds.c */ | |
594 | void rds_sock_addref(struct rds_sock *rs); | |
595 | void rds_sock_put(struct rds_sock *rs); | |
596 | void rds_wake_sk_sleep(struct rds_sock *rs); | |
597 | static inline void __rds_wake_sk_sleep(struct sock *sk) | |
598 | { | |
aa395145 | 599 | wait_queue_head_t *waitq = sk_sleep(sk); |
39de8281 AG |
600 | |
601 | if (!sock_flag(sk, SOCK_DEAD) && waitq) | |
602 | wake_up(waitq); | |
603 | } | |
604 | extern wait_queue_head_t rds_poll_waitq; | |
605 | ||
606 | ||
607 | /* bind.c */ | |
608 | int rds_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len); | |
609 | void rds_remove_bound(struct rds_sock *rs); | |
610 | struct rds_sock *rds_find_bound(__be32 addr, __be16 port); | |
7b565434 | 611 | int rds_bind_lock_init(void); |
612 | void rds_bind_lock_destroy(void); | |
39de8281 AG |
613 | |
614 | /* cong.c */ | |
615 | int rds_cong_get_maps(struct rds_connection *conn); | |
616 | void rds_cong_add_conn(struct rds_connection *conn); | |
617 | void rds_cong_remove_conn(struct rds_connection *conn); | |
618 | void rds_cong_set_bit(struct rds_cong_map *map, __be16 port); | |
619 | void rds_cong_clear_bit(struct rds_cong_map *map, __be16 port); | |
620 | int rds_cong_wait(struct rds_cong_map *map, __be16 port, int nonblock, struct rds_sock *rs); | |
621 | void rds_cong_queue_updates(struct rds_cong_map *map); | |
622 | void rds_cong_map_updated(struct rds_cong_map *map, uint64_t); | |
623 | int rds_cong_updated_since(unsigned long *recent); | |
624 | void rds_cong_add_socket(struct rds_sock *); | |
625 | void rds_cong_remove_socket(struct rds_sock *); | |
626 | void rds_cong_exit(void); | |
627 | struct rds_message *rds_cong_update_alloc(struct rds_connection *conn); | |
628 | ||
629 | /* conn.c */ | |
ef87b7ea | 630 | int rds_conn_init(void); |
39de8281 | 631 | void rds_conn_exit(void); |
d5a8ac28 SV |
632 | struct rds_connection *rds_conn_create(struct net *net, |
633 | __be32 laddr, __be32 faddr, | |
39de8281 | 634 | struct rds_transport *trans, gfp_t gfp); |
d5a8ac28 SV |
635 | struct rds_connection *rds_conn_create_outgoing(struct net *net, |
636 | __be32 laddr, __be32 faddr, | |
39de8281 | 637 | struct rds_transport *trans, gfp_t gfp); |
2dc39357 | 638 | void rds_conn_shutdown(struct rds_connection *conn); |
39de8281 | 639 | void rds_conn_destroy(struct rds_connection *conn); |
39de8281 | 640 | void rds_conn_drop(struct rds_connection *conn); |
f3c6808d | 641 | void rds_conn_connect_if_down(struct rds_connection *conn); |
39de8281 AG |
642 | void rds_for_each_conn_info(struct socket *sock, unsigned int len, |
643 | struct rds_info_iterator *iter, | |
644 | struct rds_info_lengths *lens, | |
645 | int (*visitor)(struct rds_connection *, void *), | |
646 | size_t item_len); | |
b9075fa9 JP |
647 | __printf(2, 3) |
648 | void __rds_conn_error(struct rds_connection *conn, const char *, ...); | |
39de8281 AG |
649 | #define rds_conn_error(conn, fmt...) \ |
650 | __rds_conn_error(conn, KERN_WARNING "RDS: " fmt) | |
651 | ||
652 | static inline int | |
653 | rds_conn_transition(struct rds_connection *conn, int old, int new) | |
654 | { | |
655 | return atomic_cmpxchg(&conn->c_state, old, new) == old; | |
656 | } | |
657 | ||
658 | static inline int | |
659 | rds_conn_state(struct rds_connection *conn) | |
660 | { | |
661 | return atomic_read(&conn->c_state); | |
662 | } | |
663 | ||
664 | static inline int | |
665 | rds_conn_up(struct rds_connection *conn) | |
666 | { | |
667 | return atomic_read(&conn->c_state) == RDS_CONN_UP; | |
668 | } | |
669 | ||
670 | static inline int | |
671 | rds_conn_connecting(struct rds_connection *conn) | |
672 | { | |
673 | return atomic_read(&conn->c_state) == RDS_CONN_CONNECTING; | |
674 | } | |
675 | ||
676 | /* message.c */ | |
677 | struct rds_message *rds_message_alloc(unsigned int nents, gfp_t gfp); | |
fc445084 | 678 | struct scatterlist *rds_message_alloc_sgs(struct rds_message *rm, int nents); |
083735f4 | 679 | int rds_message_copy_from_user(struct rds_message *rm, struct iov_iter *from); |
39de8281 AG |
680 | struct rds_message *rds_message_map_pages(unsigned long *page_addrs, unsigned int total_len); |
681 | void rds_message_populate_header(struct rds_header *hdr, __be16 sport, | |
682 | __be16 dport, u64 seq); | |
683 | int rds_message_add_extension(struct rds_header *hdr, | |
684 | unsigned int type, const void *data, unsigned int len); | |
685 | int rds_message_next_extension(struct rds_header *hdr, | |
686 | unsigned int *pos, void *buf, unsigned int *buflen); | |
39de8281 | 687 | int rds_message_add_rdma_dest_extension(struct rds_header *hdr, u32 r_key, u32 offset); |
c310e72c | 688 | int rds_message_inc_copy_to_user(struct rds_incoming *inc, struct iov_iter *to); |
39de8281 AG |
689 | void rds_message_inc_free(struct rds_incoming *inc); |
690 | void rds_message_addref(struct rds_message *rm); | |
691 | void rds_message_put(struct rds_message *rm); | |
692 | void rds_message_wait(struct rds_message *rm); | |
693 | void rds_message_unmapped(struct rds_message *rm); | |
694 | ||
695 | static inline void rds_message_make_checksum(struct rds_header *hdr) | |
696 | { | |
697 | hdr->h_csum = 0; | |
698 | hdr->h_csum = ip_fast_csum((void *) hdr, sizeof(*hdr) >> 2); | |
699 | } | |
700 | ||
701 | static inline int rds_message_verify_checksum(const struct rds_header *hdr) | |
702 | { | |
703 | return !hdr->h_csum || ip_fast_csum((void *) hdr, sizeof(*hdr) >> 2) == 0; | |
704 | } | |
705 | ||
706 | ||
707 | /* page.c */ | |
708 | int rds_page_remainder_alloc(struct scatterlist *scat, unsigned long bytes, | |
709 | gfp_t gfp); | |
710 | int rds_page_copy_user(struct page *page, unsigned long offset, | |
711 | void __user *ptr, unsigned long bytes, | |
712 | int to_user); | |
713 | #define rds_page_copy_to_user(page, offset, ptr, bytes) \ | |
714 | rds_page_copy_user(page, offset, ptr, bytes, 1) | |
715 | #define rds_page_copy_from_user(page, offset, ptr, bytes) \ | |
716 | rds_page_copy_user(page, offset, ptr, bytes, 0) | |
717 | void rds_page_exit(void); | |
718 | ||
719 | /* recv.c */ | |
720 | void rds_inc_init(struct rds_incoming *inc, struct rds_connection *conn, | |
721 | __be32 saddr); | |
39de8281 AG |
722 | void rds_inc_put(struct rds_incoming *inc); |
723 | void rds_recv_incoming(struct rds_connection *conn, __be32 saddr, __be32 daddr, | |
6114eab5 | 724 | struct rds_incoming *inc, gfp_t gfp); |
1b784140 YX |
725 | int rds_recvmsg(struct socket *sock, struct msghdr *msg, size_t size, |
726 | int msg_flags); | |
39de8281 AG |
727 | void rds_clear_recv_queue(struct rds_sock *rs); |
728 | int rds_notify_queue_get(struct rds_sock *rs, struct msghdr *msg); | |
729 | void rds_inc_info_copy(struct rds_incoming *inc, | |
730 | struct rds_info_iterator *iter, | |
731 | __be32 saddr, __be32 daddr, int flip); | |
732 | ||
733 | /* send.c */ | |
1b784140 | 734 | int rds_sendmsg(struct socket *sock, struct msghdr *msg, size_t payload_len); |
39de8281 AG |
735 | void rds_send_reset(struct rds_connection *conn); |
736 | int rds_send_xmit(struct rds_connection *conn); | |
737 | struct sockaddr_in; | |
738 | void rds_send_drop_to(struct rds_sock *rs, struct sockaddr_in *dest); | |
739 | typedef int (*is_acked_func)(struct rds_message *rm, uint64_t ack); | |
740 | void rds_send_drop_acked(struct rds_connection *conn, u64 ack, | |
741 | is_acked_func is_acked); | |
39de8281 AG |
742 | int rds_send_pong(struct rds_connection *conn, __be16 dport); |
743 | struct rds_message *rds_send_get_message(struct rds_connection *, | |
f8b3aaf2 | 744 | struct rm_rdma_op *); |
39de8281 AG |
745 | |
746 | /* rdma.c */ | |
747 | void rds_rdma_unuse(struct rds_sock *rs, u32 r_key, int force); | |
21f79afa AG |
748 | int rds_get_mr(struct rds_sock *rs, char __user *optval, int optlen); |
749 | int rds_get_mr_for_dest(struct rds_sock *rs, char __user *optval, int optlen); | |
750 | int rds_free_mr(struct rds_sock *rs, char __user *optval, int optlen); | |
751 | void rds_rdma_drop_keys(struct rds_sock *rs); | |
752 | int rds_rdma_extra_size(struct rds_rdma_args *args); | |
753 | int rds_cmsg_rdma_args(struct rds_sock *rs, struct rds_message *rm, | |
754 | struct cmsghdr *cmsg); | |
755 | int rds_cmsg_rdma_dest(struct rds_sock *rs, struct rds_message *rm, | |
756 | struct cmsghdr *cmsg); | |
757 | int rds_cmsg_rdma_args(struct rds_sock *rs, struct rds_message *rm, | |
758 | struct cmsghdr *cmsg); | |
759 | int rds_cmsg_rdma_map(struct rds_sock *rs, struct rds_message *rm, | |
760 | struct cmsghdr *cmsg); | |
f8b3aaf2 | 761 | void rds_rdma_free_op(struct rm_rdma_op *ro); |
d0ab25a8 | 762 | void rds_atomic_free_op(struct rm_atomic_op *ao); |
15133f6e AG |
763 | void rds_rdma_send_complete(struct rds_message *rm, int wc_status); |
764 | void rds_atomic_send_complete(struct rds_message *rm, int wc_status); | |
765 | int rds_cmsg_atomic(struct rds_sock *rs, struct rds_message *rm, | |
766 | struct cmsghdr *cmsg); | |
21f79afa | 767 | |
c1b1203d | 768 | void __rds_put_mr_final(struct rds_mr *mr); |
21f79afa AG |
769 | static inline void rds_mr_put(struct rds_mr *mr) |
770 | { | |
771 | if (atomic_dec_and_test(&mr->r_refcount)) | |
772 | __rds_put_mr_final(mr); | |
773 | } | |
39de8281 AG |
774 | |
775 | /* stats.c */ | |
9b8de747 | 776 | DECLARE_PER_CPU_SHARED_ALIGNED(struct rds_statistics, rds_stats); |
39de8281 AG |
777 | #define rds_stats_inc_which(which, member) do { \ |
778 | per_cpu(which, get_cpu()).member++; \ | |
779 | put_cpu(); \ | |
780 | } while (0) | |
781 | #define rds_stats_inc(member) rds_stats_inc_which(rds_stats, member) | |
782 | #define rds_stats_add_which(which, member, count) do { \ | |
783 | per_cpu(which, get_cpu()).member += count; \ | |
784 | put_cpu(); \ | |
785 | } while (0) | |
786 | #define rds_stats_add(member, count) rds_stats_add_which(rds_stats, member, count) | |
ef87b7ea | 787 | int rds_stats_init(void); |
39de8281 AG |
788 | void rds_stats_exit(void); |
789 | void rds_stats_info_copy(struct rds_info_iterator *iter, | |
36cbd3dc JE |
790 | uint64_t *values, const char *const *names, |
791 | size_t nr); | |
39de8281 AG |
792 | |
793 | /* sysctl.c */ | |
ef87b7ea | 794 | int rds_sysctl_init(void); |
39de8281 AG |
795 | void rds_sysctl_exit(void); |
796 | extern unsigned long rds_sysctl_sndbuf_min; | |
797 | extern unsigned long rds_sysctl_sndbuf_default; | |
798 | extern unsigned long rds_sysctl_sndbuf_max; | |
799 | extern unsigned long rds_sysctl_reconnect_min_jiffies; | |
800 | extern unsigned long rds_sysctl_reconnect_max_jiffies; | |
801 | extern unsigned int rds_sysctl_max_unacked_packets; | |
802 | extern unsigned int rds_sysctl_max_unacked_bytes; | |
803 | extern unsigned int rds_sysctl_ping_enable; | |
804 | extern unsigned long rds_sysctl_trace_flags; | |
805 | extern unsigned int rds_sysctl_trace_level; | |
806 | ||
807 | /* threads.c */ | |
ef87b7ea | 808 | int rds_threads_init(void); |
39de8281 AG |
809 | void rds_threads_exit(void); |
810 | extern struct workqueue_struct *rds_wq; | |
2dc39357 | 811 | void rds_queue_reconnect(struct rds_connection *conn); |
39de8281 AG |
812 | void rds_connect_worker(struct work_struct *); |
813 | void rds_shutdown_worker(struct work_struct *); | |
814 | void rds_send_worker(struct work_struct *); | |
815 | void rds_recv_worker(struct work_struct *); | |
816 | void rds_connect_complete(struct rds_connection *conn); | |
817 | ||
818 | /* transport.c */ | |
819 | int rds_trans_register(struct rds_transport *trans); | |
820 | void rds_trans_unregister(struct rds_transport *trans); | |
d5a8ac28 | 821 | struct rds_transport *rds_trans_get_preferred(struct net *net, __be32 addr); |
5adb5bc6 | 822 | void rds_trans_put(struct rds_transport *trans); |
39de8281 AG |
823 | unsigned int rds_trans_stats_info_copy(struct rds_info_iterator *iter, |
824 | unsigned int avail); | |
d97dac54 | 825 | struct rds_transport *rds_trans_get(int t_type); |
ef87b7ea | 826 | int rds_trans_init(void); |
39de8281 AG |
827 | void rds_trans_exit(void); |
828 | ||
829 | #endif |