Andy Grover | 39de828 | 2009-02-24 15:30:19 +0000 | [diff] [blame] | 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> |
| 10 | |
| 11 | #include "info.h" |
| 12 | |
| 13 | /* |
| 14 | * RDS Network protocol version |
| 15 | */ |
| 16 | #define RDS_PROTOCOL_3_0 0x0300 |
| 17 | #define RDS_PROTOCOL_3_1 0x0301 |
| 18 | #define RDS_PROTOCOL_VERSION RDS_PROTOCOL_3_1 |
| 19 | #define RDS_PROTOCOL_MAJOR(v) ((v) >> 8) |
| 20 | #define RDS_PROTOCOL_MINOR(v) ((v) & 255) |
| 21 | #define RDS_PROTOCOL(maj, min) (((maj) << 8) | min) |
| 22 | |
| 23 | /* |
| 24 | * XXX randomly chosen, but at least seems to be unused: |
| 25 | * # 18464-18768 Unassigned |
| 26 | * We should do better. We want a reserved port to discourage unpriv'ed |
| 27 | * userspace from listening. |
| 28 | */ |
| 29 | #define RDS_PORT 18634 |
| 30 | |
Andy Grover | 8cbd960 | 2009-04-01 08:20:20 +0000 | [diff] [blame] | 31 | #ifdef ATOMIC64_INIT |
| 32 | #define KERNEL_HAS_ATOMIC64 |
| 33 | #endif |
| 34 | |
Andy Grover | 39de828 | 2009-02-24 15:30:19 +0000 | [diff] [blame] | 35 | #ifdef DEBUG |
| 36 | #define rdsdebug(fmt, args...) pr_debug("%s(): " fmt, __func__ , ##args) |
| 37 | #else |
| 38 | /* sigh, pr_debug() causes unused variable warnings */ |
Joe Perches | b9075fa | 2011-10-31 17:11:33 -0700 | [diff] [blame] | 39 | static inline __printf(1, 2) |
| 40 | void rdsdebug(char *fmt, ...) |
Andy Grover | 39de828 | 2009-02-24 15:30:19 +0000 | [diff] [blame] | 41 | { |
| 42 | } |
| 43 | #endif |
| 44 | |
| 45 | /* XXX is there one of these somewhere? */ |
| 46 | #define ceil(x, y) \ |
| 47 | ({ unsigned long __x = (x), __y = (y); (__x + __y - 1) / __y; }) |
| 48 | |
| 49 | #define RDS_FRAG_SHIFT 12 |
| 50 | #define RDS_FRAG_SIZE ((unsigned int)(1 << RDS_FRAG_SHIFT)) |
| 51 | |
| 52 | #define RDS_CONG_MAP_BYTES (65536 / 8) |
Andy Grover | 39de828 | 2009-02-24 15:30:19 +0000 | [diff] [blame] | 53 | #define RDS_CONG_MAP_PAGES (PAGE_ALIGN(RDS_CONG_MAP_BYTES) / PAGE_SIZE) |
| 54 | #define RDS_CONG_MAP_PAGE_BITS (PAGE_SIZE * 8) |
| 55 | |
| 56 | struct rds_cong_map { |
| 57 | struct rb_node m_rb_node; |
| 58 | __be32 m_addr; |
| 59 | wait_queue_head_t m_waitq; |
| 60 | struct list_head m_conn_list; |
| 61 | unsigned long m_page_addrs[RDS_CONG_MAP_PAGES]; |
| 62 | }; |
| 63 | |
| 64 | |
| 65 | /* |
| 66 | * This is how we will track the connection state: |
| 67 | * A connection is always in one of the following |
| 68 | * states. Updates to the state are atomic and imply |
| 69 | * a memory barrier. |
| 70 | */ |
| 71 | enum { |
| 72 | RDS_CONN_DOWN = 0, |
| 73 | RDS_CONN_CONNECTING, |
| 74 | RDS_CONN_DISCONNECTING, |
| 75 | RDS_CONN_UP, |
| 76 | RDS_CONN_ERROR, |
| 77 | }; |
| 78 | |
| 79 | /* Bits for c_flags */ |
| 80 | #define RDS_LL_SEND_FULL 0 |
| 81 | #define RDS_RECONNECT_PENDING 1 |
Zach Brown | 0f4b1c7 | 2010-06-04 14:41:41 -0700 | [diff] [blame] | 82 | #define RDS_IN_XMIT 2 |
Andy Grover | 39de828 | 2009-02-24 15:30:19 +0000 | [diff] [blame] | 83 | |
| 84 | struct rds_connection { |
| 85 | struct hlist_node c_hash_node; |
| 86 | __be32 c_laddr; |
| 87 | __be32 c_faddr; |
| 88 | unsigned int c_loopback:1; |
| 89 | struct rds_connection *c_passive; |
| 90 | |
| 91 | struct rds_cong_map *c_lcong; |
| 92 | struct rds_cong_map *c_fcong; |
| 93 | |
Andy Grover | 39de828 | 2009-02-24 15:30:19 +0000 | [diff] [blame] | 94 | struct rds_message *c_xmit_rm; |
| 95 | unsigned long c_xmit_sg; |
| 96 | unsigned int c_xmit_hdr_off; |
| 97 | unsigned int c_xmit_data_off; |
Andy Grover | 15133f6 | 2010-01-12 14:33:38 -0800 | [diff] [blame] | 98 | unsigned int c_xmit_atomic_sent; |
Andy Grover | 5b2366b | 2010-02-03 19:36:44 -0800 | [diff] [blame] | 99 | unsigned int c_xmit_rdma_sent; |
| 100 | unsigned int c_xmit_data_sent; |
Andy Grover | 39de828 | 2009-02-24 15:30:19 +0000 | [diff] [blame] | 101 | |
| 102 | spinlock_t c_lock; /* protect msg queues */ |
| 103 | u64 c_next_tx_seq; |
| 104 | struct list_head c_send_queue; |
| 105 | struct list_head c_retrans; |
| 106 | |
| 107 | u64 c_next_rx_seq; |
| 108 | |
| 109 | struct rds_transport *c_trans; |
| 110 | void *c_transport_data; |
| 111 | |
| 112 | atomic_t c_state; |
Sowmini Varadhan | 443be0e | 2015-04-08 12:33:47 -0400 | [diff] [blame] | 113 | unsigned long c_send_gen; |
Andy Grover | 39de828 | 2009-02-24 15:30:19 +0000 | [diff] [blame] | 114 | unsigned long c_flags; |
| 115 | unsigned long c_reconnect_jiffies; |
| 116 | struct delayed_work c_send_w; |
| 117 | struct delayed_work c_recv_w; |
| 118 | struct delayed_work c_conn_w; |
| 119 | struct work_struct c_down_w; |
| 120 | struct mutex c_cm_lock; /* protect conn state & cm */ |
Zach Brown | 0f4b1c7 | 2010-06-04 14:41:41 -0700 | [diff] [blame] | 121 | wait_queue_head_t c_waitq; |
Andy Grover | 39de828 | 2009-02-24 15:30:19 +0000 | [diff] [blame] | 122 | |
| 123 | struct list_head c_map_item; |
| 124 | unsigned long c_map_queued; |
Andy Grover | 39de828 | 2009-02-24 15:30:19 +0000 | [diff] [blame] | 125 | |
| 126 | unsigned int c_unacked_packets; |
| 127 | unsigned int c_unacked_bytes; |
| 128 | |
| 129 | /* Protocol version */ |
| 130 | unsigned int c_version; |
| 131 | }; |
| 132 | |
| 133 | #define RDS_FLAG_CONG_BITMAP 0x01 |
| 134 | #define RDS_FLAG_ACK_REQUIRED 0x02 |
| 135 | #define RDS_FLAG_RETRANSMITTED 0x04 |
Steve Wise | 7b70d03 | 2009-04-09 14:09:39 +0000 | [diff] [blame] | 136 | #define RDS_MAX_ADV_CREDIT 255 |
Andy Grover | 39de828 | 2009-02-24 15:30:19 +0000 | [diff] [blame] | 137 | |
| 138 | /* |
| 139 | * Maximum space available for extension headers. |
| 140 | */ |
| 141 | #define RDS_HEADER_EXT_SPACE 16 |
| 142 | |
| 143 | struct rds_header { |
| 144 | __be64 h_sequence; |
| 145 | __be64 h_ack; |
| 146 | __be32 h_len; |
| 147 | __be16 h_sport; |
| 148 | __be16 h_dport; |
| 149 | u8 h_flags; |
| 150 | u8 h_credit; |
| 151 | u8 h_padding[4]; |
| 152 | __sum16 h_csum; |
| 153 | |
| 154 | u8 h_exthdr[RDS_HEADER_EXT_SPACE]; |
| 155 | }; |
| 156 | |
| 157 | /* |
| 158 | * Reserved - indicates end of extensions |
| 159 | */ |
| 160 | #define RDS_EXTHDR_NONE 0 |
| 161 | |
| 162 | /* |
| 163 | * This extension header is included in the very |
| 164 | * first message that is sent on a new connection, |
| 165 | * and identifies the protocol level. This will help |
| 166 | * rolling updates if a future change requires breaking |
| 167 | * the protocol. |
| 168 | * NB: This is no longer true for IB, where we do a version |
| 169 | * negotiation during the connection setup phase (protocol |
| 170 | * version information is included in the RDMA CM private data). |
| 171 | */ |
| 172 | #define RDS_EXTHDR_VERSION 1 |
| 173 | struct rds_ext_header_version { |
| 174 | __be32 h_version; |
| 175 | }; |
| 176 | |
| 177 | /* |
| 178 | * This extension header is included in the RDS message |
| 179 | * chasing an RDMA operation. |
| 180 | */ |
| 181 | #define RDS_EXTHDR_RDMA 2 |
| 182 | struct rds_ext_header_rdma { |
| 183 | __be32 h_rdma_rkey; |
| 184 | }; |
| 185 | |
| 186 | /* |
| 187 | * This extension header tells the peer about the |
| 188 | * destination <R_Key,offset> of the requested RDMA |
| 189 | * operation. |
| 190 | */ |
| 191 | #define RDS_EXTHDR_RDMA_DEST 3 |
| 192 | struct rds_ext_header_rdma_dest { |
| 193 | __be32 h_rdma_rkey; |
| 194 | __be32 h_rdma_offset; |
| 195 | }; |
| 196 | |
| 197 | #define __RDS_EXTHDR_MAX 16 /* for now */ |
| 198 | |
| 199 | struct rds_incoming { |
| 200 | atomic_t i_refcount; |
| 201 | struct list_head i_item; |
| 202 | struct rds_connection *i_conn; |
| 203 | struct rds_header i_hdr; |
| 204 | unsigned long i_rx_jiffies; |
| 205 | __be32 i_saddr; |
| 206 | |
| 207 | rds_rdma_cookie_t i_rdma_cookie; |
| 208 | }; |
| 209 | |
Andy Grover | 21f79af | 2010-01-12 12:57:27 -0800 | [diff] [blame] | 210 | struct rds_mr { |
| 211 | struct rb_node r_rb_node; |
| 212 | atomic_t r_refcount; |
| 213 | u32 r_key; |
| 214 | |
| 215 | /* A copy of the creation flags */ |
| 216 | unsigned int r_use_once:1; |
| 217 | unsigned int r_invalidate:1; |
| 218 | unsigned int r_write:1; |
| 219 | |
| 220 | /* This is for RDS_MR_DEAD. |
| 221 | * It would be nice & consistent to make this part of the above |
| 222 | * bit field here, but we need to use test_and_set_bit. |
| 223 | */ |
| 224 | unsigned long r_state; |
| 225 | struct rds_sock *r_sock; /* back pointer to the socket that owns us */ |
| 226 | struct rds_transport *r_trans; |
| 227 | void *r_trans_private; |
| 228 | }; |
| 229 | |
| 230 | /* Flags for mr->r_state */ |
| 231 | #define RDS_MR_DEAD 0 |
| 232 | |
Andy Grover | 21f79af | 2010-01-12 12:57:27 -0800 | [diff] [blame] | 233 | static inline rds_rdma_cookie_t rds_rdma_make_cookie(u32 r_key, u32 offset) |
| 234 | { |
| 235 | return r_key | (((u64) offset) << 32); |
| 236 | } |
| 237 | |
| 238 | static inline u32 rds_rdma_cookie_key(rds_rdma_cookie_t cookie) |
| 239 | { |
| 240 | return cookie; |
| 241 | } |
| 242 | |
| 243 | static inline u32 rds_rdma_cookie_offset(rds_rdma_cookie_t cookie) |
| 244 | { |
| 245 | return cookie >> 32; |
| 246 | } |
| 247 | |
Andy Grover | 15133f6 | 2010-01-12 14:33:38 -0800 | [diff] [blame] | 248 | /* atomic operation types */ |
| 249 | #define RDS_ATOMIC_TYPE_CSWP 0 |
| 250 | #define RDS_ATOMIC_TYPE_FADD 1 |
| 251 | |
Andy Grover | 39de828 | 2009-02-24 15:30:19 +0000 | [diff] [blame] | 252 | /* |
| 253 | * m_sock_item and m_conn_item are on lists that are serialized under |
| 254 | * conn->c_lock. m_sock_item has additional meaning in that once it is empty |
| 255 | * the message will not be put back on the retransmit list after being sent. |
| 256 | * messages that are canceled while being sent rely on this. |
| 257 | * |
| 258 | * m_inc is used by loopback so that it can pass an incoming message straight |
| 259 | * back up into the rx path. It embeds a wire header which is also used by |
| 260 | * the send path, which is kind of awkward. |
| 261 | * |
| 262 | * m_sock_item indicates the message's presence on a socket's send or receive |
| 263 | * queue. m_rs will point to that socket. |
| 264 | * |
| 265 | * m_daddr is used by cancellation to prune messages to a given destination. |
| 266 | * |
| 267 | * The RDS_MSG_ON_SOCK and RDS_MSG_ON_CONN flags are used to avoid lock |
| 268 | * nesting. As paths iterate over messages on a sock, or conn, they must |
| 269 | * also lock the conn, or sock, to remove the message from those lists too. |
| 270 | * Testing the flag to determine if the message is still on the lists lets |
| 271 | * us avoid testing the list_head directly. That means each path can use |
| 272 | * the message's list_head to keep it on a local list while juggling locks |
| 273 | * without confusing the other path. |
| 274 | * |
| 275 | * m_ack_seq is an optional field set by transports who need a different |
| 276 | * sequence number range to invalidate. They can use this in a callback |
| 277 | * that they pass to rds_send_drop_acked() to see if each message has been |
| 278 | * acked. The HAS_ACK_SEQ flag can be used to detect messages which haven't |
| 279 | * had ack_seq set yet. |
| 280 | */ |
| 281 | #define RDS_MSG_ON_SOCK 1 |
| 282 | #define RDS_MSG_ON_CONN 2 |
| 283 | #define RDS_MSG_HAS_ACK_SEQ 3 |
| 284 | #define RDS_MSG_ACK_REQUIRED 4 |
| 285 | #define RDS_MSG_RETRANSMITTED 5 |
| 286 | #define RDS_MSG_MAPPED 6 |
| 287 | #define RDS_MSG_PAGEVEC 7 |
| 288 | |
| 289 | struct rds_message { |
| 290 | atomic_t m_refcount; |
| 291 | struct list_head m_sock_item; |
| 292 | struct list_head m_conn_item; |
| 293 | struct rds_incoming m_inc; |
| 294 | u64 m_ack_seq; |
| 295 | __be32 m_daddr; |
| 296 | unsigned long m_flags; |
| 297 | |
| 298 | /* Never access m_rs without holding m_rs_lock. |
| 299 | * Lock nesting is |
| 300 | * rm->m_rs_lock |
| 301 | * -> rs->rs_lock |
| 302 | */ |
| 303 | spinlock_t m_rs_lock; |
Chris Mason | c83188d | 2010-04-21 13:09:28 -0700 | [diff] [blame] | 304 | wait_queue_head_t m_flush_wait; |
| 305 | |
Andy Grover | 39de828 | 2009-02-24 15:30:19 +0000 | [diff] [blame] | 306 | struct rds_sock *m_rs; |
Andy Grover | 7e3bd65 | 2010-03-01 16:04:59 -0800 | [diff] [blame] | 307 | |
| 308 | /* cookie to send to remote, in rds header */ |
Andy Grover | 39de828 | 2009-02-24 15:30:19 +0000 | [diff] [blame] | 309 | rds_rdma_cookie_t m_rdma_cookie; |
Andy Grover | 7e3bd65 | 2010-03-01 16:04:59 -0800 | [diff] [blame] | 310 | |
| 311 | unsigned int m_used_sgs; |
| 312 | unsigned int m_total_sgs; |
| 313 | |
Andy Grover | ff3d7d3 | 2010-03-01 14:03:09 -0800 | [diff] [blame] | 314 | void *m_final_op; |
| 315 | |
Andy Grover | e779137 | 2010-01-12 12:15:02 -0800 | [diff] [blame] | 316 | struct { |
Andy Grover | 15133f6 | 2010-01-12 14:33:38 -0800 | [diff] [blame] | 317 | struct rm_atomic_op { |
| 318 | int op_type; |
Andy Grover | 20c72bd | 2010-08-25 05:51:28 -0700 | [diff] [blame] | 319 | union { |
| 320 | struct { |
| 321 | uint64_t compare; |
| 322 | uint64_t swap; |
| 323 | uint64_t compare_mask; |
| 324 | uint64_t swap_mask; |
| 325 | } op_m_cswp; |
| 326 | struct { |
| 327 | uint64_t add; |
| 328 | uint64_t nocarry_mask; |
| 329 | } op_m_fadd; |
| 330 | }; |
Andy Grover | 15133f6 | 2010-01-12 14:33:38 -0800 | [diff] [blame] | 331 | |
| 332 | u32 op_rkey; |
| 333 | u64 op_remote_addr; |
| 334 | unsigned int op_notify:1; |
| 335 | unsigned int op_recverr:1; |
| 336 | unsigned int op_mapped:1; |
Andy Grover | 2c3a5f9 | 2010-03-01 16:10:40 -0800 | [diff] [blame] | 337 | unsigned int op_silent:1; |
Andy Grover | 15133f6 | 2010-01-12 14:33:38 -0800 | [diff] [blame] | 338 | unsigned int op_active:1; |
Andy Grover | 15133f6 | 2010-01-12 14:33:38 -0800 | [diff] [blame] | 339 | struct scatterlist *op_sg; |
Andy Grover | f8b3aaf | 2010-03-01 14:11:53 -0800 | [diff] [blame] | 340 | struct rds_notifier *op_notifier; |
Andy Grover | 15133f6 | 2010-01-12 14:33:38 -0800 | [diff] [blame] | 341 | |
| 342 | struct rds_mr *op_rdma_mr; |
| 343 | } atomic; |
| 344 | struct rm_rdma_op { |
Andy Grover | f8b3aaf | 2010-03-01 14:11:53 -0800 | [diff] [blame] | 345 | u32 op_rkey; |
| 346 | u64 op_remote_addr; |
| 347 | unsigned int op_write:1; |
| 348 | unsigned int op_fence:1; |
| 349 | unsigned int op_notify:1; |
| 350 | unsigned int op_recverr:1; |
| 351 | unsigned int op_mapped:1; |
Andy Grover | 2c3a5f9 | 2010-03-01 16:10:40 -0800 | [diff] [blame] | 352 | unsigned int op_silent:1; |
Andy Grover | f8b3aaf | 2010-03-01 14:11:53 -0800 | [diff] [blame] | 353 | unsigned int op_active:1; |
| 354 | unsigned int op_bytes; |
| 355 | unsigned int op_nents; |
| 356 | unsigned int op_count; |
| 357 | struct scatterlist *op_sg; |
| 358 | struct rds_notifier *op_notifier; |
| 359 | |
| 360 | struct rds_mr *op_rdma_mr; |
Andy Grover | e779137 | 2010-01-12 12:15:02 -0800 | [diff] [blame] | 361 | } rdma; |
Andy Grover | 15133f6 | 2010-01-12 14:33:38 -0800 | [diff] [blame] | 362 | struct rm_data_op { |
Andy Grover | 241eef3 | 2010-01-19 21:25:26 -0800 | [diff] [blame] | 363 | unsigned int op_active:1; |
Andy Grover | 6c7cc6e | 2010-01-27 18:04:18 -0800 | [diff] [blame] | 364 | unsigned int op_nents; |
| 365 | unsigned int op_count; |
Wengang Wang | d655a9f | 2015-05-21 13:11:40 +0800 | [diff] [blame] | 366 | unsigned int op_dmasg; |
| 367 | unsigned int op_dmaoff; |
Andy Grover | 6c7cc6e | 2010-01-27 18:04:18 -0800 | [diff] [blame] | 368 | struct scatterlist *op_sg; |
Andy Grover | e779137 | 2010-01-12 12:15:02 -0800 | [diff] [blame] | 369 | } data; |
| 370 | }; |
Andy Grover | 39de828 | 2009-02-24 15:30:19 +0000 | [diff] [blame] | 371 | }; |
| 372 | |
| 373 | /* |
| 374 | * The RDS notifier is used (optionally) to tell the application about |
| 375 | * completed RDMA operations. Rather than keeping the whole rds message |
| 376 | * around on the queue, we allocate a small notifier that is put on the |
| 377 | * socket's notifier_list. Notifications are delivered to the application |
| 378 | * through control messages. |
| 379 | */ |
| 380 | struct rds_notifier { |
| 381 | struct list_head n_list; |
| 382 | uint64_t n_user_token; |
| 383 | int n_status; |
| 384 | }; |
| 385 | |
| 386 | /** |
| 387 | * struct rds_transport - transport specific behavioural hooks |
| 388 | * |
| 389 | * @xmit: .xmit is called by rds_send_xmit() to tell the transport to send |
| 390 | * part of a message. The caller serializes on the send_sem so this |
| 391 | * doesn't need to be reentrant for a given conn. The header must be |
| 392 | * sent before the data payload. .xmit must be prepared to send a |
| 393 | * message with no data payload. .xmit should return the number of |
| 394 | * bytes that were sent down the connection, including header bytes. |
| 395 | * Returning 0 tells the caller that it doesn't need to perform any |
| 396 | * additional work now. This is usually the case when the transport has |
| 397 | * filled the sending queue for its connection and will handle |
| 398 | * triggering the rds thread to continue the send when space becomes |
| 399 | * available. Returning -EAGAIN tells the caller to retry the send |
| 400 | * immediately. Returning -ENOMEM tells the caller to retry the send at |
| 401 | * some point in the future. |
| 402 | * |
| 403 | * @conn_shutdown: conn_shutdown stops traffic on the given connection. Once |
| 404 | * it returns the connection can not call rds_recv_incoming(). |
| 405 | * This will only be called once after conn_connect returns |
| 406 | * non-zero success and will The caller serializes this with |
| 407 | * the send and connecting paths (xmit_* and conn_*). The |
| 408 | * transport is responsible for other serialization, including |
| 409 | * rds_recv_incoming(). This is called in process context but |
| 410 | * should try hard not to block. |
Andy Grover | 39de828 | 2009-02-24 15:30:19 +0000 | [diff] [blame] | 411 | */ |
| 412 | |
| 413 | struct rds_transport { |
| 414 | char t_name[TRANSNAMSIZ]; |
| 415 | struct list_head t_item; |
| 416 | struct module *t_owner; |
| 417 | unsigned int t_prefer_loopback:1; |
Andy Grover | 335776bd | 2009-08-21 12:28:34 +0000 | [diff] [blame] | 418 | unsigned int t_type; |
Andy Grover | 39de828 | 2009-02-24 15:30:19 +0000 | [diff] [blame] | 419 | |
| 420 | int (*laddr_check)(__be32 addr); |
| 421 | int (*conn_alloc)(struct rds_connection *conn, gfp_t gfp); |
| 422 | void (*conn_free)(void *data); |
| 423 | int (*conn_connect)(struct rds_connection *conn); |
| 424 | void (*conn_shutdown)(struct rds_connection *conn); |
| 425 | void (*xmit_prepare)(struct rds_connection *conn); |
| 426 | void (*xmit_complete)(struct rds_connection *conn); |
| 427 | int (*xmit)(struct rds_connection *conn, struct rds_message *rm, |
| 428 | unsigned int hdr_off, unsigned int sg, unsigned int off); |
Andy Grover | f8b3aaf | 2010-03-01 14:11:53 -0800 | [diff] [blame] | 429 | int (*xmit_rdma)(struct rds_connection *conn, struct rm_rdma_op *op); |
Andy Grover | ff3d7d3 | 2010-03-01 14:03:09 -0800 | [diff] [blame] | 430 | int (*xmit_atomic)(struct rds_connection *conn, struct rm_atomic_op *op); |
Andy Grover | 39de828 | 2009-02-24 15:30:19 +0000 | [diff] [blame] | 431 | int (*recv)(struct rds_connection *conn); |
Al Viro | c310e72 | 2014-11-20 09:21:14 -0500 | [diff] [blame] | 432 | int (*inc_copy_to_user)(struct rds_incoming *inc, struct iov_iter *to); |
Andy Grover | 39de828 | 2009-02-24 15:30:19 +0000 | [diff] [blame] | 433 | void (*inc_free)(struct rds_incoming *inc); |
| 434 | |
| 435 | int (*cm_handle_connect)(struct rdma_cm_id *cm_id, |
| 436 | struct rdma_cm_event *event); |
| 437 | int (*cm_initiate_connect)(struct rdma_cm_id *cm_id); |
| 438 | void (*cm_connect_complete)(struct rds_connection *conn, |
| 439 | struct rdma_cm_event *event); |
| 440 | |
| 441 | unsigned int (*stats_info_copy)(struct rds_info_iterator *iter, |
| 442 | unsigned int avail); |
| 443 | void (*exit)(void); |
| 444 | void *(*get_mr)(struct scatterlist *sg, unsigned long nr_sg, |
| 445 | struct rds_sock *rs, u32 *key_ret); |
| 446 | void (*sync_mr)(void *trans_private, int direction); |
| 447 | void (*free_mr)(void *trans_private, int invalidate); |
| 448 | void (*flush_mrs)(void); |
| 449 | }; |
| 450 | |
| 451 | struct rds_sock { |
| 452 | struct sock rs_sk; |
| 453 | |
| 454 | u64 rs_user_addr; |
| 455 | u64 rs_user_bytes; |
| 456 | |
| 457 | /* |
| 458 | * bound_addr used for both incoming and outgoing, no INADDR_ANY |
| 459 | * support. |
| 460 | */ |
Chris Mason | 38a4e5e | 2010-05-11 15:09:45 -0700 | [diff] [blame] | 461 | struct hlist_node rs_bound_node; |
Andy Grover | 39de828 | 2009-02-24 15:30:19 +0000 | [diff] [blame] | 462 | __be32 rs_bound_addr; |
| 463 | __be32 rs_conn_addr; |
| 464 | __be16 rs_bound_port; |
| 465 | __be16 rs_conn_port; |
Andy Grover | 39de828 | 2009-02-24 15:30:19 +0000 | [diff] [blame] | 466 | struct rds_transport *rs_transport; |
| 467 | |
| 468 | /* |
| 469 | * rds_sendmsg caches the conn it used the last time around. |
| 470 | * This helps avoid costly lookups. |
| 471 | */ |
| 472 | struct rds_connection *rs_conn; |
| 473 | |
| 474 | /* flag indicating we were congested or not */ |
| 475 | int rs_congested; |
Andy Grover | b98ba52 | 2010-03-11 13:50:04 +0000 | [diff] [blame] | 476 | /* seen congestion (ENOBUFS) when sending? */ |
| 477 | int rs_seen_congestion; |
Andy Grover | 39de828 | 2009-02-24 15:30:19 +0000 | [diff] [blame] | 478 | |
| 479 | /* rs_lock protects all these adjacent members before the newline */ |
| 480 | spinlock_t rs_lock; |
| 481 | struct list_head rs_send_queue; |
| 482 | u32 rs_snd_bytes; |
| 483 | int rs_rcv_bytes; |
| 484 | struct list_head rs_notify_queue; /* currently used for failed RDMAs */ |
| 485 | |
| 486 | /* Congestion wake_up. If rs_cong_monitor is set, we use cong_mask |
| 487 | * to decide whether the application should be woken up. |
| 488 | * If not set, we use rs_cong_track to find out whether a cong map |
| 489 | * update arrived. |
| 490 | */ |
| 491 | uint64_t rs_cong_mask; |
| 492 | uint64_t rs_cong_notify; |
| 493 | struct list_head rs_cong_list; |
| 494 | unsigned long rs_cong_track; |
| 495 | |
| 496 | /* |
| 497 | * rs_recv_lock protects the receive queue, and is |
| 498 | * used to serialize with rds_release. |
| 499 | */ |
| 500 | rwlock_t rs_recv_lock; |
| 501 | struct list_head rs_recv_queue; |
| 502 | |
| 503 | /* just for stats reporting */ |
| 504 | struct list_head rs_item; |
| 505 | |
| 506 | /* these have their own lock */ |
| 507 | spinlock_t rs_rdma_lock; |
| 508 | struct rb_root rs_rdma_keys; |
| 509 | |
| 510 | /* Socket options - in case there will be more */ |
| 511 | unsigned char rs_recverr, |
| 512 | rs_cong_monitor; |
| 513 | }; |
| 514 | |
| 515 | static inline struct rds_sock *rds_sk_to_rs(const struct sock *sk) |
| 516 | { |
| 517 | return container_of(sk, struct rds_sock, rs_sk); |
| 518 | } |
| 519 | static inline struct sock *rds_rs_to_sk(struct rds_sock *rs) |
| 520 | { |
| 521 | return &rs->rs_sk; |
| 522 | } |
| 523 | |
| 524 | /* |
| 525 | * The stack assigns sk_sndbuf and sk_rcvbuf to twice the specified value |
| 526 | * to account for overhead. We don't account for overhead, we just apply |
| 527 | * the number of payload bytes to the specified value. |
| 528 | */ |
| 529 | static inline int rds_sk_sndbuf(struct rds_sock *rs) |
| 530 | { |
| 531 | return rds_rs_to_sk(rs)->sk_sndbuf / 2; |
| 532 | } |
| 533 | static inline int rds_sk_rcvbuf(struct rds_sock *rs) |
| 534 | { |
| 535 | return rds_rs_to_sk(rs)->sk_rcvbuf / 2; |
| 536 | } |
| 537 | |
| 538 | struct rds_statistics { |
| 539 | uint64_t s_conn_reset; |
| 540 | uint64_t s_recv_drop_bad_checksum; |
| 541 | uint64_t s_recv_drop_old_seq; |
| 542 | uint64_t s_recv_drop_no_sock; |
| 543 | uint64_t s_recv_drop_dead_sock; |
| 544 | uint64_t s_recv_deliver_raced; |
| 545 | uint64_t s_recv_delivered; |
| 546 | uint64_t s_recv_queued; |
| 547 | uint64_t s_recv_immediate_retry; |
| 548 | uint64_t s_recv_delayed_retry; |
| 549 | uint64_t s_recv_ack_required; |
| 550 | uint64_t s_recv_rdma_bytes; |
| 551 | uint64_t s_recv_ping; |
| 552 | uint64_t s_send_queue_empty; |
| 553 | uint64_t s_send_queue_full; |
Andy Grover | 049ee3f | 2010-03-23 17:39:07 -0700 | [diff] [blame] | 554 | uint64_t s_send_lock_contention; |
| 555 | uint64_t s_send_lock_queue_raced; |
Andy Grover | 39de828 | 2009-02-24 15:30:19 +0000 | [diff] [blame] | 556 | uint64_t s_send_immediate_retry; |
| 557 | uint64_t s_send_delayed_retry; |
| 558 | uint64_t s_send_drop_acked; |
| 559 | uint64_t s_send_ack_required; |
| 560 | uint64_t s_send_queued; |
| 561 | uint64_t s_send_rdma; |
| 562 | uint64_t s_send_rdma_bytes; |
| 563 | uint64_t s_send_pong; |
| 564 | uint64_t s_page_remainder_hit; |
| 565 | uint64_t s_page_remainder_miss; |
| 566 | uint64_t s_copy_to_user; |
| 567 | uint64_t s_copy_from_user; |
| 568 | uint64_t s_cong_update_queued; |
| 569 | uint64_t s_cong_update_received; |
| 570 | uint64_t s_cong_send_error; |
| 571 | uint64_t s_cong_send_blocked; |
| 572 | }; |
| 573 | |
| 574 | /* af_rds.c */ |
| 575 | void rds_sock_addref(struct rds_sock *rs); |
| 576 | void rds_sock_put(struct rds_sock *rs); |
| 577 | void rds_wake_sk_sleep(struct rds_sock *rs); |
| 578 | static inline void __rds_wake_sk_sleep(struct sock *sk) |
| 579 | { |
Eric Dumazet | aa39514 | 2010-04-20 13:03:51 +0000 | [diff] [blame] | 580 | wait_queue_head_t *waitq = sk_sleep(sk); |
Andy Grover | 39de828 | 2009-02-24 15:30:19 +0000 | [diff] [blame] | 581 | |
| 582 | if (!sock_flag(sk, SOCK_DEAD) && waitq) |
| 583 | wake_up(waitq); |
| 584 | } |
| 585 | extern wait_queue_head_t rds_poll_waitq; |
| 586 | |
| 587 | |
| 588 | /* bind.c */ |
| 589 | int rds_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len); |
| 590 | void rds_remove_bound(struct rds_sock *rs); |
| 591 | struct rds_sock *rds_find_bound(__be32 addr, __be16 port); |
| 592 | |
| 593 | /* cong.c */ |
| 594 | int rds_cong_get_maps(struct rds_connection *conn); |
| 595 | void rds_cong_add_conn(struct rds_connection *conn); |
| 596 | void rds_cong_remove_conn(struct rds_connection *conn); |
| 597 | void rds_cong_set_bit(struct rds_cong_map *map, __be16 port); |
| 598 | void rds_cong_clear_bit(struct rds_cong_map *map, __be16 port); |
| 599 | int rds_cong_wait(struct rds_cong_map *map, __be16 port, int nonblock, struct rds_sock *rs); |
| 600 | void rds_cong_queue_updates(struct rds_cong_map *map); |
| 601 | void rds_cong_map_updated(struct rds_cong_map *map, uint64_t); |
| 602 | int rds_cong_updated_since(unsigned long *recent); |
| 603 | void rds_cong_add_socket(struct rds_sock *); |
| 604 | void rds_cong_remove_socket(struct rds_sock *); |
| 605 | void rds_cong_exit(void); |
| 606 | struct rds_message *rds_cong_update_alloc(struct rds_connection *conn); |
| 607 | |
| 608 | /* conn.c */ |
Zach Brown | ef87b7e | 2010-07-09 12:26:20 -0700 | [diff] [blame] | 609 | int rds_conn_init(void); |
Andy Grover | 39de828 | 2009-02-24 15:30:19 +0000 | [diff] [blame] | 610 | void rds_conn_exit(void); |
| 611 | struct rds_connection *rds_conn_create(__be32 laddr, __be32 faddr, |
| 612 | struct rds_transport *trans, gfp_t gfp); |
| 613 | struct rds_connection *rds_conn_create_outgoing(__be32 laddr, __be32 faddr, |
| 614 | struct rds_transport *trans, gfp_t gfp); |
Andy Grover | 2dc3935 | 2010-06-11 13:49:13 -0700 | [diff] [blame] | 615 | void rds_conn_shutdown(struct rds_connection *conn); |
Andy Grover | 39de828 | 2009-02-24 15:30:19 +0000 | [diff] [blame] | 616 | void rds_conn_destroy(struct rds_connection *conn); |
Andy Grover | 39de828 | 2009-02-24 15:30:19 +0000 | [diff] [blame] | 617 | void rds_conn_drop(struct rds_connection *conn); |
Zach Brown | f3c6808 | 2010-05-24 13:14:36 -0700 | [diff] [blame] | 618 | void rds_conn_connect_if_down(struct rds_connection *conn); |
Andy Grover | 39de828 | 2009-02-24 15:30:19 +0000 | [diff] [blame] | 619 | void rds_for_each_conn_info(struct socket *sock, unsigned int len, |
| 620 | struct rds_info_iterator *iter, |
| 621 | struct rds_info_lengths *lens, |
| 622 | int (*visitor)(struct rds_connection *, void *), |
| 623 | size_t item_len); |
Joe Perches | b9075fa | 2011-10-31 17:11:33 -0700 | [diff] [blame] | 624 | __printf(2, 3) |
| 625 | void __rds_conn_error(struct rds_connection *conn, const char *, ...); |
Andy Grover | 39de828 | 2009-02-24 15:30:19 +0000 | [diff] [blame] | 626 | #define rds_conn_error(conn, fmt...) \ |
| 627 | __rds_conn_error(conn, KERN_WARNING "RDS: " fmt) |
| 628 | |
| 629 | static inline int |
| 630 | rds_conn_transition(struct rds_connection *conn, int old, int new) |
| 631 | { |
| 632 | return atomic_cmpxchg(&conn->c_state, old, new) == old; |
| 633 | } |
| 634 | |
| 635 | static inline int |
| 636 | rds_conn_state(struct rds_connection *conn) |
| 637 | { |
| 638 | return atomic_read(&conn->c_state); |
| 639 | } |
| 640 | |
| 641 | static inline int |
| 642 | rds_conn_up(struct rds_connection *conn) |
| 643 | { |
| 644 | return atomic_read(&conn->c_state) == RDS_CONN_UP; |
| 645 | } |
| 646 | |
| 647 | static inline int |
| 648 | rds_conn_connecting(struct rds_connection *conn) |
| 649 | { |
| 650 | return atomic_read(&conn->c_state) == RDS_CONN_CONNECTING; |
| 651 | } |
| 652 | |
| 653 | /* message.c */ |
| 654 | struct rds_message *rds_message_alloc(unsigned int nents, gfp_t gfp); |
Andy Grover | fc44508 | 2010-01-12 12:56:06 -0800 | [diff] [blame] | 655 | struct scatterlist *rds_message_alloc_sgs(struct rds_message *rm, int nents); |
Al Viro | 083735f | 2014-11-20 09:31:08 -0500 | [diff] [blame] | 656 | int rds_message_copy_from_user(struct rds_message *rm, struct iov_iter *from); |
Andy Grover | 39de828 | 2009-02-24 15:30:19 +0000 | [diff] [blame] | 657 | struct rds_message *rds_message_map_pages(unsigned long *page_addrs, unsigned int total_len); |
| 658 | void rds_message_populate_header(struct rds_header *hdr, __be16 sport, |
| 659 | __be16 dport, u64 seq); |
| 660 | int rds_message_add_extension(struct rds_header *hdr, |
| 661 | unsigned int type, const void *data, unsigned int len); |
| 662 | int rds_message_next_extension(struct rds_header *hdr, |
| 663 | unsigned int *pos, void *buf, unsigned int *buflen); |
Andy Grover | 39de828 | 2009-02-24 15:30:19 +0000 | [diff] [blame] | 664 | int rds_message_add_rdma_dest_extension(struct rds_header *hdr, u32 r_key, u32 offset); |
Al Viro | c310e72 | 2014-11-20 09:21:14 -0500 | [diff] [blame] | 665 | int rds_message_inc_copy_to_user(struct rds_incoming *inc, struct iov_iter *to); |
Andy Grover | 39de828 | 2009-02-24 15:30:19 +0000 | [diff] [blame] | 666 | void rds_message_inc_free(struct rds_incoming *inc); |
| 667 | void rds_message_addref(struct rds_message *rm); |
| 668 | void rds_message_put(struct rds_message *rm); |
| 669 | void rds_message_wait(struct rds_message *rm); |
| 670 | void rds_message_unmapped(struct rds_message *rm); |
| 671 | |
| 672 | static inline void rds_message_make_checksum(struct rds_header *hdr) |
| 673 | { |
| 674 | hdr->h_csum = 0; |
| 675 | hdr->h_csum = ip_fast_csum((void *) hdr, sizeof(*hdr) >> 2); |
| 676 | } |
| 677 | |
| 678 | static inline int rds_message_verify_checksum(const struct rds_header *hdr) |
| 679 | { |
| 680 | return !hdr->h_csum || ip_fast_csum((void *) hdr, sizeof(*hdr) >> 2) == 0; |
| 681 | } |
| 682 | |
| 683 | |
| 684 | /* page.c */ |
| 685 | int rds_page_remainder_alloc(struct scatterlist *scat, unsigned long bytes, |
| 686 | gfp_t gfp); |
| 687 | int rds_page_copy_user(struct page *page, unsigned long offset, |
| 688 | void __user *ptr, unsigned long bytes, |
| 689 | int to_user); |
| 690 | #define rds_page_copy_to_user(page, offset, ptr, bytes) \ |
| 691 | rds_page_copy_user(page, offset, ptr, bytes, 1) |
| 692 | #define rds_page_copy_from_user(page, offset, ptr, bytes) \ |
| 693 | rds_page_copy_user(page, offset, ptr, bytes, 0) |
| 694 | void rds_page_exit(void); |
| 695 | |
| 696 | /* recv.c */ |
| 697 | void rds_inc_init(struct rds_incoming *inc, struct rds_connection *conn, |
| 698 | __be32 saddr); |
Andy Grover | 39de828 | 2009-02-24 15:30:19 +0000 | [diff] [blame] | 699 | void rds_inc_put(struct rds_incoming *inc); |
| 700 | void rds_recv_incoming(struct rds_connection *conn, __be32 saddr, __be32 daddr, |
Cong Wang | 6114eab | 2011-11-25 23:14:40 +0800 | [diff] [blame] | 701 | struct rds_incoming *inc, gfp_t gfp); |
Ying Xue | 1b78414 | 2015-03-02 15:37:48 +0800 | [diff] [blame] | 702 | int rds_recvmsg(struct socket *sock, struct msghdr *msg, size_t size, |
| 703 | int msg_flags); |
Andy Grover | 39de828 | 2009-02-24 15:30:19 +0000 | [diff] [blame] | 704 | void rds_clear_recv_queue(struct rds_sock *rs); |
| 705 | int rds_notify_queue_get(struct rds_sock *rs, struct msghdr *msg); |
| 706 | void rds_inc_info_copy(struct rds_incoming *inc, |
| 707 | struct rds_info_iterator *iter, |
| 708 | __be32 saddr, __be32 daddr, int flip); |
| 709 | |
| 710 | /* send.c */ |
Ying Xue | 1b78414 | 2015-03-02 15:37:48 +0800 | [diff] [blame] | 711 | int rds_sendmsg(struct socket *sock, struct msghdr *msg, size_t payload_len); |
Andy Grover | 39de828 | 2009-02-24 15:30:19 +0000 | [diff] [blame] | 712 | void rds_send_reset(struct rds_connection *conn); |
| 713 | int rds_send_xmit(struct rds_connection *conn); |
| 714 | struct sockaddr_in; |
| 715 | void rds_send_drop_to(struct rds_sock *rs, struct sockaddr_in *dest); |
| 716 | typedef int (*is_acked_func)(struct rds_message *rm, uint64_t ack); |
| 717 | void rds_send_drop_acked(struct rds_connection *conn, u64 ack, |
| 718 | is_acked_func is_acked); |
Andy Grover | 39de828 | 2009-02-24 15:30:19 +0000 | [diff] [blame] | 719 | int rds_send_pong(struct rds_connection *conn, __be16 dport); |
| 720 | struct rds_message *rds_send_get_message(struct rds_connection *, |
Andy Grover | f8b3aaf | 2010-03-01 14:11:53 -0800 | [diff] [blame] | 721 | struct rm_rdma_op *); |
Andy Grover | 39de828 | 2009-02-24 15:30:19 +0000 | [diff] [blame] | 722 | |
| 723 | /* rdma.c */ |
| 724 | void rds_rdma_unuse(struct rds_sock *rs, u32 r_key, int force); |
Andy Grover | 21f79af | 2010-01-12 12:57:27 -0800 | [diff] [blame] | 725 | int rds_get_mr(struct rds_sock *rs, char __user *optval, int optlen); |
| 726 | int rds_get_mr_for_dest(struct rds_sock *rs, char __user *optval, int optlen); |
| 727 | int rds_free_mr(struct rds_sock *rs, char __user *optval, int optlen); |
| 728 | void rds_rdma_drop_keys(struct rds_sock *rs); |
| 729 | int rds_rdma_extra_size(struct rds_rdma_args *args); |
| 730 | int rds_cmsg_rdma_args(struct rds_sock *rs, struct rds_message *rm, |
| 731 | struct cmsghdr *cmsg); |
| 732 | int rds_cmsg_rdma_dest(struct rds_sock *rs, struct rds_message *rm, |
| 733 | struct cmsghdr *cmsg); |
| 734 | int rds_cmsg_rdma_args(struct rds_sock *rs, struct rds_message *rm, |
| 735 | struct cmsghdr *cmsg); |
| 736 | int rds_cmsg_rdma_map(struct rds_sock *rs, struct rds_message *rm, |
| 737 | struct cmsghdr *cmsg); |
Andy Grover | f8b3aaf | 2010-03-01 14:11:53 -0800 | [diff] [blame] | 738 | void rds_rdma_free_op(struct rm_rdma_op *ro); |
Andy Grover | d0ab25a | 2010-01-27 16:15:48 -0800 | [diff] [blame] | 739 | void rds_atomic_free_op(struct rm_atomic_op *ao); |
Andy Grover | 15133f6 | 2010-01-12 14:33:38 -0800 | [diff] [blame] | 740 | void rds_rdma_send_complete(struct rds_message *rm, int wc_status); |
| 741 | void rds_atomic_send_complete(struct rds_message *rm, int wc_status); |
| 742 | int rds_cmsg_atomic(struct rds_sock *rs, struct rds_message *rm, |
| 743 | struct cmsghdr *cmsg); |
Andy Grover | 21f79af | 2010-01-12 12:57:27 -0800 | [diff] [blame] | 744 | |
Joe Perches | c1b1203 | 2013-10-18 13:48:25 -0700 | [diff] [blame] | 745 | void __rds_put_mr_final(struct rds_mr *mr); |
Andy Grover | 21f79af | 2010-01-12 12:57:27 -0800 | [diff] [blame] | 746 | static inline void rds_mr_put(struct rds_mr *mr) |
| 747 | { |
| 748 | if (atomic_dec_and_test(&mr->r_refcount)) |
| 749 | __rds_put_mr_final(mr); |
| 750 | } |
Andy Grover | 39de828 | 2009-02-24 15:30:19 +0000 | [diff] [blame] | 751 | |
| 752 | /* stats.c */ |
David Howells | 9b8de74 | 2009-04-21 23:00:24 +0100 | [diff] [blame] | 753 | DECLARE_PER_CPU_SHARED_ALIGNED(struct rds_statistics, rds_stats); |
Andy Grover | 39de828 | 2009-02-24 15:30:19 +0000 | [diff] [blame] | 754 | #define rds_stats_inc_which(which, member) do { \ |
| 755 | per_cpu(which, get_cpu()).member++; \ |
| 756 | put_cpu(); \ |
| 757 | } while (0) |
| 758 | #define rds_stats_inc(member) rds_stats_inc_which(rds_stats, member) |
| 759 | #define rds_stats_add_which(which, member, count) do { \ |
| 760 | per_cpu(which, get_cpu()).member += count; \ |
| 761 | put_cpu(); \ |
| 762 | } while (0) |
| 763 | #define rds_stats_add(member, count) rds_stats_add_which(rds_stats, member, count) |
Zach Brown | ef87b7e | 2010-07-09 12:26:20 -0700 | [diff] [blame] | 764 | int rds_stats_init(void); |
Andy Grover | 39de828 | 2009-02-24 15:30:19 +0000 | [diff] [blame] | 765 | void rds_stats_exit(void); |
| 766 | void rds_stats_info_copy(struct rds_info_iterator *iter, |
Jan Engelhardt | 36cbd3d | 2009-08-05 10:42:58 -0700 | [diff] [blame] | 767 | uint64_t *values, const char *const *names, |
| 768 | size_t nr); |
Andy Grover | 39de828 | 2009-02-24 15:30:19 +0000 | [diff] [blame] | 769 | |
| 770 | /* sysctl.c */ |
Zach Brown | ef87b7e | 2010-07-09 12:26:20 -0700 | [diff] [blame] | 771 | int rds_sysctl_init(void); |
Andy Grover | 39de828 | 2009-02-24 15:30:19 +0000 | [diff] [blame] | 772 | void rds_sysctl_exit(void); |
| 773 | extern unsigned long rds_sysctl_sndbuf_min; |
| 774 | extern unsigned long rds_sysctl_sndbuf_default; |
| 775 | extern unsigned long rds_sysctl_sndbuf_max; |
| 776 | extern unsigned long rds_sysctl_reconnect_min_jiffies; |
| 777 | extern unsigned long rds_sysctl_reconnect_max_jiffies; |
| 778 | extern unsigned int rds_sysctl_max_unacked_packets; |
| 779 | extern unsigned int rds_sysctl_max_unacked_bytes; |
| 780 | extern unsigned int rds_sysctl_ping_enable; |
| 781 | extern unsigned long rds_sysctl_trace_flags; |
| 782 | extern unsigned int rds_sysctl_trace_level; |
| 783 | |
| 784 | /* threads.c */ |
Zach Brown | ef87b7e | 2010-07-09 12:26:20 -0700 | [diff] [blame] | 785 | int rds_threads_init(void); |
Andy Grover | 39de828 | 2009-02-24 15:30:19 +0000 | [diff] [blame] | 786 | void rds_threads_exit(void); |
| 787 | extern struct workqueue_struct *rds_wq; |
Andy Grover | 2dc3935 | 2010-06-11 13:49:13 -0700 | [diff] [blame] | 788 | void rds_queue_reconnect(struct rds_connection *conn); |
Andy Grover | 39de828 | 2009-02-24 15:30:19 +0000 | [diff] [blame] | 789 | void rds_connect_worker(struct work_struct *); |
| 790 | void rds_shutdown_worker(struct work_struct *); |
| 791 | void rds_send_worker(struct work_struct *); |
| 792 | void rds_recv_worker(struct work_struct *); |
| 793 | void rds_connect_complete(struct rds_connection *conn); |
| 794 | |
| 795 | /* transport.c */ |
| 796 | int rds_trans_register(struct rds_transport *trans); |
| 797 | void rds_trans_unregister(struct rds_transport *trans); |
| 798 | struct rds_transport *rds_trans_get_preferred(__be32 addr); |
Zach Brown | 5adb5bc | 2010-07-23 10:32:31 -0700 | [diff] [blame] | 799 | void rds_trans_put(struct rds_transport *trans); |
Andy Grover | 39de828 | 2009-02-24 15:30:19 +0000 | [diff] [blame] | 800 | unsigned int rds_trans_stats_info_copy(struct rds_info_iterator *iter, |
| 801 | unsigned int avail); |
Sowmini Varadhan | d97dac5 | 2015-05-29 17:28:08 -0400 | [diff] [blame] | 802 | struct rds_transport *rds_trans_get(int t_type); |
Zach Brown | ef87b7e | 2010-07-09 12:26:20 -0700 | [diff] [blame] | 803 | int rds_trans_init(void); |
Andy Grover | 39de828 | 2009-02-24 15:30:19 +0000 | [diff] [blame] | 804 | void rds_trans_exit(void); |
| 805 | |
| 806 | #endif |