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42e9a92f RL |
1 | /* |
2 | * Copyright(c) 2007 - 2008 Intel Corporation. All rights reserved. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms and conditions of the GNU General Public License, | |
6 | * version 2, as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope it will be useful, but WITHOUT | |
9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
11 | * more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License along with | |
14 | * this program; if not, write to the Free Software Foundation, Inc., | |
15 | * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. | |
16 | * | |
17 | * Maintained at www.Open-FCoE.org | |
18 | */ | |
19 | ||
20 | /* | |
21 | * RPORT GENERAL INFO | |
22 | * | |
23 | * This file contains all processing regarding fc_rports. It contains the | |
24 | * rport state machine and does all rport interaction with the transport class. | |
25 | * There should be no other places in libfc that interact directly with the | |
26 | * transport class in regards to adding and deleting rports. | |
27 | * | |
28 | * fc_rport's represent N_Port's within the fabric. | |
29 | */ | |
30 | ||
31 | /* | |
32 | * RPORT LOCKING | |
33 | * | |
34 | * The rport should never hold the rport mutex and then attempt to acquire | |
35 | * either the lport or disc mutexes. The rport's mutex is considered lesser | |
36 | * than both the lport's mutex and the disc mutex. Refer to fc_lport.c for | |
37 | * more comments on the heirarchy. | |
38 | * | |
39 | * The locking strategy is similar to the lport's strategy. The lock protects | |
40 | * the rport's states and is held and released by the entry points to the rport | |
41 | * block. All _enter_* functions correspond to rport states and expect the rport | |
42 | * mutex to be locked before calling them. This means that rports only handle | |
43 | * one request or response at a time, since they're not critical for the I/O | |
44 | * path this potential over-use of the mutex is acceptable. | |
45 | */ | |
46 | ||
47 | #include <linux/kernel.h> | |
48 | #include <linux/spinlock.h> | |
49 | #include <linux/interrupt.h> | |
50 | #include <linux/rcupdate.h> | |
51 | #include <linux/timer.h> | |
52 | #include <linux/workqueue.h> | |
53 | #include <asm/unaligned.h> | |
54 | ||
55 | #include <scsi/libfc.h> | |
56 | #include <scsi/fc_encode.h> | |
57 | ||
42e9a92f RL |
58 | struct workqueue_struct *rport_event_queue; |
59 | ||
9fb9d328 JE |
60 | static void fc_rport_enter_plogi(struct fc_rport_priv *); |
61 | static void fc_rport_enter_prli(struct fc_rport_priv *); | |
62 | static void fc_rport_enter_rtv(struct fc_rport_priv *); | |
63 | static void fc_rport_enter_ready(struct fc_rport_priv *); | |
64 | static void fc_rport_enter_logo(struct fc_rport_priv *); | |
42e9a92f | 65 | |
9fb9d328 | 66 | static void fc_rport_recv_plogi_req(struct fc_rport_priv *, |
42e9a92f | 67 | struct fc_seq *, struct fc_frame *); |
9fb9d328 | 68 | static void fc_rport_recv_prli_req(struct fc_rport_priv *, |
42e9a92f | 69 | struct fc_seq *, struct fc_frame *); |
9fb9d328 | 70 | static void fc_rport_recv_prlo_req(struct fc_rport_priv *, |
42e9a92f | 71 | struct fc_seq *, struct fc_frame *); |
9fb9d328 | 72 | static void fc_rport_recv_logo_req(struct fc_rport_priv *, |
42e9a92f RL |
73 | struct fc_seq *, struct fc_frame *); |
74 | static void fc_rport_timeout(struct work_struct *); | |
9fb9d328 JE |
75 | static void fc_rport_error(struct fc_rport_priv *, struct fc_frame *); |
76 | static void fc_rport_error_retry(struct fc_rport_priv *, struct fc_frame *); | |
42e9a92f RL |
77 | static void fc_rport_work(struct work_struct *); |
78 | ||
79 | static const char *fc_rport_state_names[] = { | |
42e9a92f RL |
80 | [RPORT_ST_INIT] = "Init", |
81 | [RPORT_ST_PLOGI] = "PLOGI", | |
82 | [RPORT_ST_PRLI] = "PRLI", | |
83 | [RPORT_ST_RTV] = "RTV", | |
84 | [RPORT_ST_READY] = "Ready", | |
85 | [RPORT_ST_LOGO] = "LOGO", | |
14194054 | 86 | [RPORT_ST_DELETE] = "Delete", |
42e9a92f RL |
87 | }; |
88 | ||
89 | static void fc_rport_rogue_destroy(struct device *dev) | |
90 | { | |
91 | struct fc_rport *rport = dev_to_rport(dev); | |
9fb9d328 JE |
92 | struct fc_rport_priv *rdata = RPORT_TO_PRIV(rport); |
93 | ||
94 | FC_RPORT_DBG(rdata, "Destroying rogue rport\n"); | |
42e9a92f RL |
95 | kfree(rport); |
96 | } | |
97 | ||
9fb9d328 JE |
98 | struct fc_rport_priv *fc_rport_rogue_create(struct fc_lport *lport, |
99 | struct fc_rport_identifiers *ids) | |
42e9a92f RL |
100 | { |
101 | struct fc_rport *rport; | |
ab28f1fd | 102 | struct fc_rport_priv *rdata; |
42e9a92f RL |
103 | rport = kzalloc(sizeof(*rport) + sizeof(*rdata), GFP_KERNEL); |
104 | ||
105 | if (!rport) | |
106 | return NULL; | |
107 | ||
108 | rdata = RPORT_TO_PRIV(rport); | |
109 | ||
110 | rport->dd_data = rdata; | |
795d86f5 JE |
111 | rport->port_id = ids->port_id; |
112 | rport->port_name = ids->port_name; | |
113 | rport->node_name = ids->node_name; | |
114 | rport->roles = ids->roles; | |
42e9a92f RL |
115 | rport->maxframe_size = FC_MIN_MAX_PAYLOAD; |
116 | /* | |
117 | * Note: all this libfc rogue rport code will be removed for | |
118 | * upstream so it fine that this is really ugly and hacky right now. | |
119 | */ | |
120 | device_initialize(&rport->dev); | |
121 | rport->dev.release = fc_rport_rogue_destroy; | |
122 | ||
123 | mutex_init(&rdata->rp_mutex); | |
795d86f5 | 124 | rdata->local_port = lport; |
42e9a92f RL |
125 | rdata->trans_state = FC_PORTSTATE_ROGUE; |
126 | rdata->rp_state = RPORT_ST_INIT; | |
127 | rdata->event = RPORT_EV_NONE; | |
128 | rdata->flags = FC_RP_FLAGS_REC_SUPPORTED; | |
129 | rdata->ops = NULL; | |
795d86f5 JE |
130 | rdata->e_d_tov = lport->e_d_tov; |
131 | rdata->r_a_tov = lport->r_a_tov; | |
42e9a92f RL |
132 | INIT_DELAYED_WORK(&rdata->retry_work, fc_rport_timeout); |
133 | INIT_WORK(&rdata->event_work, fc_rport_work); | |
134 | /* | |
135 | * For good measure, but not necessary as we should only | |
136 | * add REAL rport to the lport list. | |
137 | */ | |
138 | INIT_LIST_HEAD(&rdata->peers); | |
139 | ||
9fb9d328 | 140 | return rdata; |
42e9a92f RL |
141 | } |
142 | ||
143 | /** | |
34f42a07 | 144 | * fc_rport_state() - return a string for the state the rport is in |
9fb9d328 | 145 | * @rdata: remote port private data |
42e9a92f | 146 | */ |
9fb9d328 | 147 | static const char *fc_rport_state(struct fc_rport_priv *rdata) |
42e9a92f RL |
148 | { |
149 | const char *cp; | |
42e9a92f RL |
150 | |
151 | cp = fc_rport_state_names[rdata->rp_state]; | |
152 | if (!cp) | |
153 | cp = "Unknown"; | |
154 | return cp; | |
155 | } | |
156 | ||
157 | /** | |
34f42a07 | 158 | * fc_set_rport_loss_tmo() - Set the remote port loss timeout in seconds. |
42e9a92f RL |
159 | * @rport: Pointer to Fibre Channel remote port structure |
160 | * @timeout: timeout in seconds | |
161 | */ | |
162 | void fc_set_rport_loss_tmo(struct fc_rport *rport, u32 timeout) | |
163 | { | |
164 | if (timeout) | |
165 | rport->dev_loss_tmo = timeout + 5; | |
166 | else | |
167 | rport->dev_loss_tmo = 30; | |
168 | } | |
169 | EXPORT_SYMBOL(fc_set_rport_loss_tmo); | |
170 | ||
171 | /** | |
34f42a07 | 172 | * fc_plogi_get_maxframe() - Get max payload from the common service parameters |
42e9a92f RL |
173 | * @flp: FLOGI payload structure |
174 | * @maxval: upper limit, may be less than what is in the service parameters | |
175 | */ | |
b2ab99c9 RL |
176 | static unsigned int fc_plogi_get_maxframe(struct fc_els_flogi *flp, |
177 | unsigned int maxval) | |
42e9a92f RL |
178 | { |
179 | unsigned int mfs; | |
180 | ||
181 | /* | |
182 | * Get max payload from the common service parameters and the | |
183 | * class 3 receive data field size. | |
184 | */ | |
185 | mfs = ntohs(flp->fl_csp.sp_bb_data) & FC_SP_BB_DATA_MASK; | |
186 | if (mfs >= FC_SP_MIN_MAX_PAYLOAD && mfs < maxval) | |
187 | maxval = mfs; | |
188 | mfs = ntohs(flp->fl_cssp[3 - 1].cp_rdfs); | |
189 | if (mfs >= FC_SP_MIN_MAX_PAYLOAD && mfs < maxval) | |
190 | maxval = mfs; | |
191 | return maxval; | |
192 | } | |
193 | ||
194 | /** | |
34f42a07 | 195 | * fc_rport_state_enter() - Change the rport's state |
9fb9d328 | 196 | * @rdata: The rport whose state should change |
42e9a92f RL |
197 | * @new: The new state of the rport |
198 | * | |
199 | * Locking Note: Called with the rport lock held | |
200 | */ | |
9fb9d328 | 201 | static void fc_rport_state_enter(struct fc_rport_priv *rdata, |
42e9a92f RL |
202 | enum fc_rport_state new) |
203 | { | |
42e9a92f RL |
204 | if (rdata->rp_state != new) |
205 | rdata->retries = 0; | |
206 | rdata->rp_state = new; | |
207 | } | |
208 | ||
209 | static void fc_rport_work(struct work_struct *work) | |
210 | { | |
571f824c | 211 | u32 port_id; |
ab28f1fd JE |
212 | struct fc_rport_priv *rdata = |
213 | container_of(work, struct fc_rport_priv, event_work); | |
42e9a92f RL |
214 | enum fc_rport_event event; |
215 | enum fc_rport_trans_state trans_state; | |
216 | struct fc_lport *lport = rdata->local_port; | |
217 | struct fc_rport_operations *rport_ops; | |
218 | struct fc_rport *rport = PRIV_TO_RPORT(rdata); | |
219 | ||
220 | mutex_lock(&rdata->rp_mutex); | |
221 | event = rdata->event; | |
222 | rport_ops = rdata->ops; | |
223 | ||
224 | if (event == RPORT_EV_CREATED) { | |
225 | struct fc_rport *new_rport; | |
ab28f1fd | 226 | struct fc_rport_priv *new_rdata; |
42e9a92f RL |
227 | struct fc_rport_identifiers ids; |
228 | ||
229 | ids.port_id = rport->port_id; | |
230 | ids.roles = rport->roles; | |
231 | ids.port_name = rport->port_name; | |
232 | ids.node_name = rport->node_name; | |
233 | ||
5f7ea3b7 | 234 | rdata->event = RPORT_EV_NONE; |
42e9a92f RL |
235 | mutex_unlock(&rdata->rp_mutex); |
236 | ||
237 | new_rport = fc_remote_port_add(lport->host, 0, &ids); | |
238 | if (new_rport) { | |
239 | /* | |
240 | * Switch from the rogue rport to the rport | |
241 | * returned by the FC class. | |
242 | */ | |
243 | new_rport->maxframe_size = rport->maxframe_size; | |
244 | ||
245 | new_rdata = new_rport->dd_data; | |
246 | new_rdata->e_d_tov = rdata->e_d_tov; | |
247 | new_rdata->r_a_tov = rdata->r_a_tov; | |
248 | new_rdata->ops = rdata->ops; | |
249 | new_rdata->local_port = rdata->local_port; | |
250 | new_rdata->flags = FC_RP_FLAGS_REC_SUPPORTED; | |
251 | new_rdata->trans_state = FC_PORTSTATE_REAL; | |
252 | mutex_init(&new_rdata->rp_mutex); | |
253 | INIT_DELAYED_WORK(&new_rdata->retry_work, | |
254 | fc_rport_timeout); | |
255 | INIT_LIST_HEAD(&new_rdata->peers); | |
256 | INIT_WORK(&new_rdata->event_work, fc_rport_work); | |
257 | ||
9fb9d328 | 258 | fc_rport_state_enter(new_rdata, RPORT_ST_READY); |
42e9a92f | 259 | } else { |
7414705e RL |
260 | printk(KERN_WARNING "libfc: Failed to allocate " |
261 | " memory for rport (%6x)\n", ids.port_id); | |
42e9a92f RL |
262 | event = RPORT_EV_FAILED; |
263 | } | |
b4c6f546 AJ |
264 | if (rport->port_id != FC_FID_DIR_SERV) |
265 | if (rport_ops->event_callback) | |
9fb9d328 | 266 | rport_ops->event_callback(lport, rdata, |
b4c6f546 | 267 | RPORT_EV_FAILED); |
42e9a92f RL |
268 | put_device(&rport->dev); |
269 | rport = new_rport; | |
270 | rdata = new_rport->dd_data; | |
271 | if (rport_ops->event_callback) | |
9fb9d328 | 272 | rport_ops->event_callback(lport, rdata, event); |
42e9a92f RL |
273 | } else if ((event == RPORT_EV_FAILED) || |
274 | (event == RPORT_EV_LOGO) || | |
275 | (event == RPORT_EV_STOP)) { | |
276 | trans_state = rdata->trans_state; | |
277 | mutex_unlock(&rdata->rp_mutex); | |
278 | if (rport_ops->event_callback) | |
9fb9d328 | 279 | rport_ops->event_callback(lport, rdata, event); |
201e5795 | 280 | cancel_delayed_work_sync(&rdata->retry_work); |
42e9a92f RL |
281 | if (trans_state == FC_PORTSTATE_ROGUE) |
282 | put_device(&rport->dev); | |
571f824c AJ |
283 | else { |
284 | port_id = rport->port_id; | |
42e9a92f | 285 | fc_remote_port_delete(rport); |
571f824c AJ |
286 | lport->tt.exch_mgr_reset(lport, 0, port_id); |
287 | lport->tt.exch_mgr_reset(lport, port_id, 0); | |
288 | } | |
42e9a92f RL |
289 | } else |
290 | mutex_unlock(&rdata->rp_mutex); | |
291 | } | |
292 | ||
293 | /** | |
34f42a07 | 294 | * fc_rport_login() - Start the remote port login state machine |
9fb9d328 | 295 | * @rdata: private remote port |
42e9a92f RL |
296 | * |
297 | * Locking Note: Called without the rport lock held. This | |
298 | * function will hold the rport lock, call an _enter_* | |
299 | * function and then unlock the rport. | |
300 | */ | |
9fb9d328 | 301 | int fc_rport_login(struct fc_rport_priv *rdata) |
42e9a92f | 302 | { |
42e9a92f RL |
303 | mutex_lock(&rdata->rp_mutex); |
304 | ||
9fb9d328 | 305 | FC_RPORT_DBG(rdata, "Login to port\n"); |
42e9a92f | 306 | |
9fb9d328 | 307 | fc_rport_enter_plogi(rdata); |
42e9a92f RL |
308 | |
309 | mutex_unlock(&rdata->rp_mutex); | |
310 | ||
311 | return 0; | |
312 | } | |
313 | ||
5f7ea3b7 JE |
314 | /** |
315 | * fc_rport_enter_delete() - schedule a remote port to be deleted. | |
9fb9d328 | 316 | * @rdata: private remote port |
5f7ea3b7 JE |
317 | * @event: event to report as the reason for deletion |
318 | * | |
319 | * Locking Note: Called with the rport lock held. | |
320 | * | |
321 | * Allow state change into DELETE only once. | |
322 | * | |
323 | * Call queue_work only if there's no event already pending. | |
324 | * Set the new event so that the old pending event will not occur. | |
325 | * Since we have the mutex, even if fc_rport_work() is already started, | |
326 | * it'll see the new event. | |
327 | */ | |
9fb9d328 | 328 | static void fc_rport_enter_delete(struct fc_rport_priv *rdata, |
5f7ea3b7 JE |
329 | enum fc_rport_event event) |
330 | { | |
5f7ea3b7 JE |
331 | if (rdata->rp_state == RPORT_ST_DELETE) |
332 | return; | |
333 | ||
9fb9d328 | 334 | FC_RPORT_DBG(rdata, "Delete port\n"); |
5f7ea3b7 | 335 | |
9fb9d328 | 336 | fc_rport_state_enter(rdata, RPORT_ST_DELETE); |
5f7ea3b7 JE |
337 | |
338 | if (rdata->event == RPORT_EV_NONE) | |
339 | queue_work(rport_event_queue, &rdata->event_work); | |
340 | rdata->event = event; | |
341 | } | |
342 | ||
42e9a92f | 343 | /** |
34f42a07 | 344 | * fc_rport_logoff() - Logoff and remove an rport |
9fb9d328 | 345 | * @rdata: private remote port |
42e9a92f RL |
346 | * |
347 | * Locking Note: Called without the rport lock held. This | |
348 | * function will hold the rport lock, call an _enter_* | |
349 | * function and then unlock the rport. | |
350 | */ | |
9fb9d328 | 351 | int fc_rport_logoff(struct fc_rport_priv *rdata) |
42e9a92f | 352 | { |
42e9a92f RL |
353 | mutex_lock(&rdata->rp_mutex); |
354 | ||
9fb9d328 | 355 | FC_RPORT_DBG(rdata, "Remove port\n"); |
42e9a92f | 356 | |
14194054 | 357 | if (rdata->rp_state == RPORT_ST_DELETE) { |
9fb9d328 | 358 | FC_RPORT_DBG(rdata, "Port in Delete state, not removing\n"); |
b4c6f546 AJ |
359 | mutex_unlock(&rdata->rp_mutex); |
360 | goto out; | |
361 | } | |
362 | ||
9fb9d328 | 363 | fc_rport_enter_logo(rdata); |
42e9a92f RL |
364 | |
365 | /* | |
14194054 | 366 | * Change the state to Delete so that we discard |
42e9a92f RL |
367 | * the response. |
368 | */ | |
9fb9d328 | 369 | fc_rport_enter_delete(rdata, RPORT_EV_STOP); |
42e9a92f RL |
370 | mutex_unlock(&rdata->rp_mutex); |
371 | ||
b4c6f546 | 372 | out: |
42e9a92f RL |
373 | return 0; |
374 | } | |
375 | ||
376 | /** | |
34f42a07 | 377 | * fc_rport_enter_ready() - The rport is ready |
9fb9d328 | 378 | * @rdata: private remote port |
42e9a92f RL |
379 | * |
380 | * Locking Note: The rport lock is expected to be held before calling | |
381 | * this routine. | |
382 | */ | |
9fb9d328 | 383 | static void fc_rport_enter_ready(struct fc_rport_priv *rdata) |
42e9a92f | 384 | { |
9fb9d328 | 385 | fc_rport_state_enter(rdata, RPORT_ST_READY); |
42e9a92f | 386 | |
9fb9d328 | 387 | FC_RPORT_DBG(rdata, "Port is Ready\n"); |
42e9a92f | 388 | |
5f7ea3b7 JE |
389 | if (rdata->event == RPORT_EV_NONE) |
390 | queue_work(rport_event_queue, &rdata->event_work); | |
42e9a92f | 391 | rdata->event = RPORT_EV_CREATED; |
42e9a92f RL |
392 | } |
393 | ||
394 | /** | |
34f42a07 | 395 | * fc_rport_timeout() - Handler for the retry_work timer. |
ab28f1fd | 396 | * @work: The work struct of the fc_rport_priv |
42e9a92f RL |
397 | * |
398 | * Locking Note: Called without the rport lock held. This | |
399 | * function will hold the rport lock, call an _enter_* | |
400 | * function and then unlock the rport. | |
401 | */ | |
402 | static void fc_rport_timeout(struct work_struct *work) | |
403 | { | |
ab28f1fd JE |
404 | struct fc_rport_priv *rdata = |
405 | container_of(work, struct fc_rport_priv, retry_work.work); | |
42e9a92f RL |
406 | |
407 | mutex_lock(&rdata->rp_mutex); | |
408 | ||
409 | switch (rdata->rp_state) { | |
410 | case RPORT_ST_PLOGI: | |
9fb9d328 | 411 | fc_rport_enter_plogi(rdata); |
42e9a92f RL |
412 | break; |
413 | case RPORT_ST_PRLI: | |
9fb9d328 | 414 | fc_rport_enter_prli(rdata); |
42e9a92f RL |
415 | break; |
416 | case RPORT_ST_RTV: | |
9fb9d328 | 417 | fc_rport_enter_rtv(rdata); |
42e9a92f RL |
418 | break; |
419 | case RPORT_ST_LOGO: | |
9fb9d328 | 420 | fc_rport_enter_logo(rdata); |
42e9a92f RL |
421 | break; |
422 | case RPORT_ST_READY: | |
423 | case RPORT_ST_INIT: | |
14194054 | 424 | case RPORT_ST_DELETE: |
42e9a92f RL |
425 | break; |
426 | } | |
427 | ||
428 | mutex_unlock(&rdata->rp_mutex); | |
42e9a92f RL |
429 | } |
430 | ||
431 | /** | |
34f42a07 | 432 | * fc_rport_error() - Error handler, called once retries have been exhausted |
9fb9d328 | 433 | * @rdata: private remote port |
42e9a92f RL |
434 | * @fp: The frame pointer |
435 | * | |
42e9a92f RL |
436 | * Locking Note: The rport lock is expected to be held before |
437 | * calling this routine | |
438 | */ | |
9fb9d328 | 439 | static void fc_rport_error(struct fc_rport_priv *rdata, struct fc_frame *fp) |
42e9a92f | 440 | { |
9fb9d328 JE |
441 | FC_RPORT_DBG(rdata, "Error %ld in state %s, retries %d\n", |
442 | PTR_ERR(fp), fc_rport_state(rdata), rdata->retries); | |
42e9a92f | 443 | |
6755db1c CL |
444 | switch (rdata->rp_state) { |
445 | case RPORT_ST_PLOGI: | |
446 | case RPORT_ST_PRLI: | |
447 | case RPORT_ST_LOGO: | |
9fb9d328 | 448 | fc_rport_enter_delete(rdata, RPORT_EV_FAILED); |
6755db1c CL |
449 | break; |
450 | case RPORT_ST_RTV: | |
9fb9d328 | 451 | fc_rport_enter_ready(rdata); |
6755db1c | 452 | break; |
14194054 | 453 | case RPORT_ST_DELETE: |
6755db1c CL |
454 | case RPORT_ST_READY: |
455 | case RPORT_ST_INIT: | |
456 | break; | |
42e9a92f RL |
457 | } |
458 | } | |
459 | ||
6755db1c | 460 | /** |
34f42a07 | 461 | * fc_rport_error_retry() - Error handler when retries are desired |
9fb9d328 | 462 | * @rdata: private remote port data |
6755db1c CL |
463 | * @fp: The frame pointer |
464 | * | |
465 | * If the error was an exchange timeout retry immediately, | |
466 | * otherwise wait for E_D_TOV. | |
467 | * | |
468 | * Locking Note: The rport lock is expected to be held before | |
469 | * calling this routine | |
470 | */ | |
9fb9d328 JE |
471 | static void fc_rport_error_retry(struct fc_rport_priv *rdata, |
472 | struct fc_frame *fp) | |
6755db1c | 473 | { |
6755db1c CL |
474 | unsigned long delay = FC_DEF_E_D_TOV; |
475 | ||
476 | /* make sure this isn't an FC_EX_CLOSED error, never retry those */ | |
477 | if (PTR_ERR(fp) == -FC_EX_CLOSED) | |
9fb9d328 | 478 | return fc_rport_error(rdata, fp); |
6755db1c | 479 | |
a3666955 | 480 | if (rdata->retries < rdata->local_port->max_rport_retry_count) { |
9fb9d328 JE |
481 | FC_RPORT_DBG(rdata, "Error %ld in state %s, retrying\n", |
482 | PTR_ERR(fp), fc_rport_state(rdata)); | |
6755db1c CL |
483 | rdata->retries++; |
484 | /* no additional delay on exchange timeouts */ | |
485 | if (PTR_ERR(fp) == -FC_EX_TIMEOUT) | |
486 | delay = 0; | |
6755db1c CL |
487 | schedule_delayed_work(&rdata->retry_work, delay); |
488 | return; | |
489 | } | |
490 | ||
9fb9d328 | 491 | return fc_rport_error(rdata, fp); |
6755db1c CL |
492 | } |
493 | ||
42e9a92f | 494 | /** |
34f42a07 | 495 | * fc_rport_plogi_recv_resp() - Handle incoming ELS PLOGI response |
42e9a92f RL |
496 | * @sp: current sequence in the PLOGI exchange |
497 | * @fp: response frame | |
9fb9d328 | 498 | * @rdata_arg: private remote port data |
42e9a92f RL |
499 | * |
500 | * Locking Note: This function will be called without the rport lock | |
501 | * held, but it will lock, call an _enter_* function or fc_rport_error | |
502 | * and then unlock the rport. | |
503 | */ | |
504 | static void fc_rport_plogi_resp(struct fc_seq *sp, struct fc_frame *fp, | |
9fb9d328 | 505 | void *rdata_arg) |
42e9a92f | 506 | { |
9fb9d328 JE |
507 | struct fc_rport_priv *rdata = rdata_arg; |
508 | struct fc_rport *rport = PRIV_TO_RPORT(rdata); | |
42e9a92f | 509 | struct fc_lport *lport = rdata->local_port; |
a29e7646 | 510 | struct fc_els_flogi *plp = NULL; |
42e9a92f RL |
511 | unsigned int tov; |
512 | u16 csp_seq; | |
513 | u16 cssp_seq; | |
514 | u8 op; | |
515 | ||
516 | mutex_lock(&rdata->rp_mutex); | |
517 | ||
9fb9d328 | 518 | FC_RPORT_DBG(rdata, "Received a PLOGI response\n"); |
42e9a92f RL |
519 | |
520 | if (rdata->rp_state != RPORT_ST_PLOGI) { | |
9fb9d328 JE |
521 | FC_RPORT_DBG(rdata, "Received a PLOGI response, but in state " |
522 | "%s\n", fc_rport_state(rdata)); | |
76f6804e AJ |
523 | if (IS_ERR(fp)) |
524 | goto err; | |
42e9a92f RL |
525 | goto out; |
526 | } | |
527 | ||
76f6804e | 528 | if (IS_ERR(fp)) { |
9fb9d328 | 529 | fc_rport_error_retry(rdata, fp); |
76f6804e AJ |
530 | goto err; |
531 | } | |
532 | ||
42e9a92f RL |
533 | op = fc_frame_payload_op(fp); |
534 | if (op == ELS_LS_ACC && | |
535 | (plp = fc_frame_payload_get(fp, sizeof(*plp))) != NULL) { | |
536 | rport->port_name = get_unaligned_be64(&plp->fl_wwpn); | |
537 | rport->node_name = get_unaligned_be64(&plp->fl_wwnn); | |
538 | ||
539 | tov = ntohl(plp->fl_csp.sp_e_d_tov); | |
540 | if (ntohs(plp->fl_csp.sp_features) & FC_SP_FT_EDTR) | |
541 | tov /= 1000; | |
542 | if (tov > rdata->e_d_tov) | |
543 | rdata->e_d_tov = tov; | |
544 | csp_seq = ntohs(plp->fl_csp.sp_tot_seq); | |
545 | cssp_seq = ntohs(plp->fl_cssp[3 - 1].cp_con_seq); | |
546 | if (cssp_seq < csp_seq) | |
547 | csp_seq = cssp_seq; | |
548 | rdata->max_seq = csp_seq; | |
549 | rport->maxframe_size = | |
550 | fc_plogi_get_maxframe(plp, lport->mfs); | |
551 | ||
552 | /* | |
553 | * If the rport is one of the well known addresses | |
554 | * we skip PRLI and RTV and go straight to READY. | |
555 | */ | |
556 | if (rport->port_id >= FC_FID_DOM_MGR) | |
9fb9d328 | 557 | fc_rport_enter_ready(rdata); |
42e9a92f | 558 | else |
9fb9d328 | 559 | fc_rport_enter_prli(rdata); |
42e9a92f | 560 | } else |
9fb9d328 | 561 | fc_rport_error_retry(rdata, fp); |
42e9a92f RL |
562 | |
563 | out: | |
564 | fc_frame_free(fp); | |
565 | err: | |
566 | mutex_unlock(&rdata->rp_mutex); | |
567 | put_device(&rport->dev); | |
568 | } | |
569 | ||
570 | /** | |
34f42a07 | 571 | * fc_rport_enter_plogi() - Send Port Login (PLOGI) request to peer |
9fb9d328 | 572 | * @rdata: private remote port data |
42e9a92f RL |
573 | * |
574 | * Locking Note: The rport lock is expected to be held before calling | |
575 | * this routine. | |
576 | */ | |
9fb9d328 | 577 | static void fc_rport_enter_plogi(struct fc_rport_priv *rdata) |
42e9a92f | 578 | { |
42e9a92f | 579 | struct fc_lport *lport = rdata->local_port; |
9fb9d328 | 580 | struct fc_rport *rport = PRIV_TO_RPORT(rdata); |
42e9a92f RL |
581 | struct fc_frame *fp; |
582 | ||
9fb9d328 JE |
583 | FC_RPORT_DBG(rdata, "Port entered PLOGI state from %s state\n", |
584 | fc_rport_state(rdata)); | |
42e9a92f | 585 | |
9fb9d328 | 586 | fc_rport_state_enter(rdata, RPORT_ST_PLOGI); |
42e9a92f RL |
587 | |
588 | rport->maxframe_size = FC_MIN_MAX_PAYLOAD; | |
589 | fp = fc_frame_alloc(lport, sizeof(struct fc_els_flogi)); | |
590 | if (!fp) { | |
9fb9d328 | 591 | fc_rport_error_retry(rdata, fp); |
42e9a92f RL |
592 | return; |
593 | } | |
594 | rdata->e_d_tov = lport->e_d_tov; | |
595 | ||
a46f327a | 596 | if (!lport->tt.elsct_send(lport, rport->port_id, fp, ELS_PLOGI, |
9fb9d328 JE |
597 | fc_rport_plogi_resp, rdata, lport->e_d_tov)) |
598 | fc_rport_error_retry(rdata, fp); | |
42e9a92f RL |
599 | else |
600 | get_device(&rport->dev); | |
601 | } | |
602 | ||
603 | /** | |
34f42a07 | 604 | * fc_rport_prli_resp() - Process Login (PRLI) response handler |
42e9a92f RL |
605 | * @sp: current sequence in the PRLI exchange |
606 | * @fp: response frame | |
9fb9d328 | 607 | * @rdata_arg: private remote port data |
42e9a92f RL |
608 | * |
609 | * Locking Note: This function will be called without the rport lock | |
610 | * held, but it will lock, call an _enter_* function or fc_rport_error | |
611 | * and then unlock the rport. | |
612 | */ | |
613 | static void fc_rport_prli_resp(struct fc_seq *sp, struct fc_frame *fp, | |
9fb9d328 | 614 | void *rdata_arg) |
42e9a92f | 615 | { |
9fb9d328 JE |
616 | struct fc_rport_priv *rdata = rdata_arg; |
617 | struct fc_rport *rport = PRIV_TO_RPORT(rdata); | |
42e9a92f RL |
618 | struct { |
619 | struct fc_els_prli prli; | |
620 | struct fc_els_spp spp; | |
621 | } *pp; | |
622 | u32 roles = FC_RPORT_ROLE_UNKNOWN; | |
623 | u32 fcp_parm = 0; | |
624 | u8 op; | |
625 | ||
626 | mutex_lock(&rdata->rp_mutex); | |
627 | ||
9fb9d328 | 628 | FC_RPORT_DBG(rdata, "Received a PRLI response\n"); |
42e9a92f RL |
629 | |
630 | if (rdata->rp_state != RPORT_ST_PRLI) { | |
9fb9d328 JE |
631 | FC_RPORT_DBG(rdata, "Received a PRLI response, but in state " |
632 | "%s\n", fc_rport_state(rdata)); | |
76f6804e AJ |
633 | if (IS_ERR(fp)) |
634 | goto err; | |
42e9a92f RL |
635 | goto out; |
636 | } | |
637 | ||
76f6804e | 638 | if (IS_ERR(fp)) { |
9fb9d328 | 639 | fc_rport_error_retry(rdata, fp); |
76f6804e AJ |
640 | goto err; |
641 | } | |
642 | ||
42e9a92f RL |
643 | op = fc_frame_payload_op(fp); |
644 | if (op == ELS_LS_ACC) { | |
645 | pp = fc_frame_payload_get(fp, sizeof(*pp)); | |
646 | if (pp && pp->prli.prli_spp_len >= sizeof(pp->spp)) { | |
647 | fcp_parm = ntohl(pp->spp.spp_params); | |
648 | if (fcp_parm & FCP_SPPF_RETRY) | |
649 | rdata->flags |= FC_RP_FLAGS_RETRY; | |
650 | } | |
651 | ||
652 | rport->supported_classes = FC_COS_CLASS3; | |
653 | if (fcp_parm & FCP_SPPF_INIT_FCN) | |
654 | roles |= FC_RPORT_ROLE_FCP_INITIATOR; | |
655 | if (fcp_parm & FCP_SPPF_TARG_FCN) | |
656 | roles |= FC_RPORT_ROLE_FCP_TARGET; | |
657 | ||
658 | rport->roles = roles; | |
9fb9d328 | 659 | fc_rport_enter_rtv(rdata); |
42e9a92f RL |
660 | |
661 | } else { | |
9fb9d328 JE |
662 | FC_RPORT_DBG(rdata, "Bad ELS response for PRLI command\n"); |
663 | fc_rport_enter_delete(rdata, RPORT_EV_FAILED); | |
42e9a92f RL |
664 | } |
665 | ||
666 | out: | |
667 | fc_frame_free(fp); | |
668 | err: | |
669 | mutex_unlock(&rdata->rp_mutex); | |
670 | put_device(&rport->dev); | |
671 | } | |
672 | ||
673 | /** | |
34f42a07 | 674 | * fc_rport_logo_resp() - Logout (LOGO) response handler |
42e9a92f RL |
675 | * @sp: current sequence in the LOGO exchange |
676 | * @fp: response frame | |
9fb9d328 | 677 | * @rdata_arg: private remote port data |
42e9a92f RL |
678 | * |
679 | * Locking Note: This function will be called without the rport lock | |
680 | * held, but it will lock, call an _enter_* function or fc_rport_error | |
681 | * and then unlock the rport. | |
682 | */ | |
683 | static void fc_rport_logo_resp(struct fc_seq *sp, struct fc_frame *fp, | |
9fb9d328 | 684 | void *rdata_arg) |
42e9a92f | 685 | { |
9fb9d328 JE |
686 | struct fc_rport_priv *rdata = rdata_arg; |
687 | struct fc_rport *rport = PRIV_TO_RPORT(rdata); | |
42e9a92f RL |
688 | u8 op; |
689 | ||
690 | mutex_lock(&rdata->rp_mutex); | |
691 | ||
9fb9d328 | 692 | FC_RPORT_DBG(rdata, "Received a LOGO response\n"); |
42e9a92f | 693 | |
42e9a92f | 694 | if (rdata->rp_state != RPORT_ST_LOGO) { |
9fb9d328 JE |
695 | FC_RPORT_DBG(rdata, "Received a LOGO response, but in state " |
696 | "%s\n", fc_rport_state(rdata)); | |
76f6804e AJ |
697 | if (IS_ERR(fp)) |
698 | goto err; | |
42e9a92f RL |
699 | goto out; |
700 | } | |
701 | ||
76f6804e | 702 | if (IS_ERR(fp)) { |
9fb9d328 | 703 | fc_rport_error_retry(rdata, fp); |
76f6804e AJ |
704 | goto err; |
705 | } | |
706 | ||
42e9a92f RL |
707 | op = fc_frame_payload_op(fp); |
708 | if (op == ELS_LS_ACC) { | |
9fb9d328 | 709 | fc_rport_enter_rtv(rdata); |
42e9a92f | 710 | } else { |
9fb9d328 JE |
711 | FC_RPORT_DBG(rdata, "Bad ELS response for LOGO command\n"); |
712 | fc_rport_enter_delete(rdata, RPORT_EV_LOGO); | |
42e9a92f RL |
713 | } |
714 | ||
715 | out: | |
716 | fc_frame_free(fp); | |
717 | err: | |
718 | mutex_unlock(&rdata->rp_mutex); | |
719 | put_device(&rport->dev); | |
720 | } | |
721 | ||
722 | /** | |
34f42a07 | 723 | * fc_rport_enter_prli() - Send Process Login (PRLI) request to peer |
9fb9d328 | 724 | * @rdata: private remote port data |
42e9a92f RL |
725 | * |
726 | * Locking Note: The rport lock is expected to be held before calling | |
727 | * this routine. | |
728 | */ | |
9fb9d328 | 729 | static void fc_rport_enter_prli(struct fc_rport_priv *rdata) |
42e9a92f | 730 | { |
9fb9d328 | 731 | struct fc_rport *rport = PRIV_TO_RPORT(rdata); |
42e9a92f RL |
732 | struct fc_lport *lport = rdata->local_port; |
733 | struct { | |
734 | struct fc_els_prli prli; | |
735 | struct fc_els_spp spp; | |
736 | } *pp; | |
737 | struct fc_frame *fp; | |
738 | ||
9fb9d328 JE |
739 | FC_RPORT_DBG(rdata, "Port entered PRLI state from %s state\n", |
740 | fc_rport_state(rdata)); | |
42e9a92f | 741 | |
9fb9d328 | 742 | fc_rport_state_enter(rdata, RPORT_ST_PRLI); |
42e9a92f RL |
743 | |
744 | fp = fc_frame_alloc(lport, sizeof(*pp)); | |
745 | if (!fp) { | |
9fb9d328 | 746 | fc_rport_error_retry(rdata, fp); |
42e9a92f RL |
747 | return; |
748 | } | |
749 | ||
a46f327a | 750 | if (!lport->tt.elsct_send(lport, rport->port_id, fp, ELS_PRLI, |
9fb9d328 JE |
751 | fc_rport_prli_resp, rdata, lport->e_d_tov)) |
752 | fc_rport_error_retry(rdata, fp); | |
42e9a92f RL |
753 | else |
754 | get_device(&rport->dev); | |
755 | } | |
756 | ||
757 | /** | |
34f42a07 | 758 | * fc_rport_els_rtv_resp() - Request Timeout Value response handler |
42e9a92f RL |
759 | * @sp: current sequence in the RTV exchange |
760 | * @fp: response frame | |
9fb9d328 | 761 | * @rdata_arg: private remote port data |
42e9a92f RL |
762 | * |
763 | * Many targets don't seem to support this. | |
764 | * | |
765 | * Locking Note: This function will be called without the rport lock | |
766 | * held, but it will lock, call an _enter_* function or fc_rport_error | |
767 | * and then unlock the rport. | |
768 | */ | |
769 | static void fc_rport_rtv_resp(struct fc_seq *sp, struct fc_frame *fp, | |
9fb9d328 | 770 | void *rdata_arg) |
42e9a92f | 771 | { |
9fb9d328 JE |
772 | struct fc_rport_priv *rdata = rdata_arg; |
773 | struct fc_rport *rport = PRIV_TO_RPORT(rdata); | |
42e9a92f RL |
774 | u8 op; |
775 | ||
776 | mutex_lock(&rdata->rp_mutex); | |
777 | ||
9fb9d328 | 778 | FC_RPORT_DBG(rdata, "Received a RTV response\n"); |
42e9a92f RL |
779 | |
780 | if (rdata->rp_state != RPORT_ST_RTV) { | |
9fb9d328 JE |
781 | FC_RPORT_DBG(rdata, "Received a RTV response, but in state " |
782 | "%s\n", fc_rport_state(rdata)); | |
76f6804e AJ |
783 | if (IS_ERR(fp)) |
784 | goto err; | |
42e9a92f RL |
785 | goto out; |
786 | } | |
787 | ||
76f6804e | 788 | if (IS_ERR(fp)) { |
9fb9d328 | 789 | fc_rport_error(rdata, fp); |
76f6804e AJ |
790 | goto err; |
791 | } | |
792 | ||
42e9a92f RL |
793 | op = fc_frame_payload_op(fp); |
794 | if (op == ELS_LS_ACC) { | |
795 | struct fc_els_rtv_acc *rtv; | |
796 | u32 toq; | |
797 | u32 tov; | |
798 | ||
799 | rtv = fc_frame_payload_get(fp, sizeof(*rtv)); | |
800 | if (rtv) { | |
801 | toq = ntohl(rtv->rtv_toq); | |
802 | tov = ntohl(rtv->rtv_r_a_tov); | |
803 | if (tov == 0) | |
804 | tov = 1; | |
805 | rdata->r_a_tov = tov; | |
806 | tov = ntohl(rtv->rtv_e_d_tov); | |
807 | if (toq & FC_ELS_RTV_EDRES) | |
808 | tov /= 1000000; | |
809 | if (tov == 0) | |
810 | tov = 1; | |
811 | rdata->e_d_tov = tov; | |
812 | } | |
813 | } | |
814 | ||
9fb9d328 | 815 | fc_rport_enter_ready(rdata); |
42e9a92f RL |
816 | |
817 | out: | |
818 | fc_frame_free(fp); | |
819 | err: | |
820 | mutex_unlock(&rdata->rp_mutex); | |
821 | put_device(&rport->dev); | |
822 | } | |
823 | ||
824 | /** | |
34f42a07 | 825 | * fc_rport_enter_rtv() - Send Request Timeout Value (RTV) request to peer |
9fb9d328 | 826 | * @rdata: private remote port data |
42e9a92f RL |
827 | * |
828 | * Locking Note: The rport lock is expected to be held before calling | |
829 | * this routine. | |
830 | */ | |
9fb9d328 | 831 | static void fc_rport_enter_rtv(struct fc_rport_priv *rdata) |
42e9a92f RL |
832 | { |
833 | struct fc_frame *fp; | |
42e9a92f | 834 | struct fc_lport *lport = rdata->local_port; |
9fb9d328 | 835 | struct fc_rport *rport = PRIV_TO_RPORT(rdata); |
42e9a92f | 836 | |
9fb9d328 JE |
837 | FC_RPORT_DBG(rdata, "Port entered RTV state from %s state\n", |
838 | fc_rport_state(rdata)); | |
42e9a92f | 839 | |
9fb9d328 | 840 | fc_rport_state_enter(rdata, RPORT_ST_RTV); |
42e9a92f RL |
841 | |
842 | fp = fc_frame_alloc(lport, sizeof(struct fc_els_rtv)); | |
843 | if (!fp) { | |
9fb9d328 | 844 | fc_rport_error_retry(rdata, fp); |
42e9a92f RL |
845 | return; |
846 | } | |
847 | ||
a46f327a | 848 | if (!lport->tt.elsct_send(lport, rport->port_id, fp, ELS_RTV, |
9fb9d328 JE |
849 | fc_rport_rtv_resp, rdata, lport->e_d_tov)) |
850 | fc_rport_error_retry(rdata, fp); | |
42e9a92f RL |
851 | else |
852 | get_device(&rport->dev); | |
853 | } | |
854 | ||
855 | /** | |
34f42a07 | 856 | * fc_rport_enter_logo() - Send Logout (LOGO) request to peer |
9fb9d328 | 857 | * @rdata: private remote port data |
42e9a92f RL |
858 | * |
859 | * Locking Note: The rport lock is expected to be held before calling | |
860 | * this routine. | |
861 | */ | |
9fb9d328 | 862 | static void fc_rport_enter_logo(struct fc_rport_priv *rdata) |
42e9a92f | 863 | { |
42e9a92f | 864 | struct fc_lport *lport = rdata->local_port; |
9fb9d328 | 865 | struct fc_rport *rport = PRIV_TO_RPORT(rdata); |
42e9a92f RL |
866 | struct fc_frame *fp; |
867 | ||
9fb9d328 JE |
868 | FC_RPORT_DBG(rdata, "Port entered LOGO state from %s state\n", |
869 | fc_rport_state(rdata)); | |
42e9a92f | 870 | |
9fb9d328 | 871 | fc_rport_state_enter(rdata, RPORT_ST_LOGO); |
42e9a92f RL |
872 | |
873 | fp = fc_frame_alloc(lport, sizeof(struct fc_els_logo)); | |
874 | if (!fp) { | |
9fb9d328 | 875 | fc_rport_error_retry(rdata, fp); |
42e9a92f RL |
876 | return; |
877 | } | |
878 | ||
a46f327a | 879 | if (!lport->tt.elsct_send(lport, rport->port_id, fp, ELS_LOGO, |
9fb9d328 JE |
880 | fc_rport_logo_resp, rdata, lport->e_d_tov)) |
881 | fc_rport_error_retry(rdata, fp); | |
42e9a92f RL |
882 | else |
883 | get_device(&rport->dev); | |
884 | } | |
885 | ||
886 | ||
887 | /** | |
34f42a07 | 888 | * fc_rport_recv_req() - Receive a request from a rport |
42e9a92f RL |
889 | * @sp: current sequence in the PLOGI exchange |
890 | * @fp: response frame | |
9fb9d328 | 891 | * @rdata_arg: private remote port data |
42e9a92f RL |
892 | * |
893 | * Locking Note: Called without the rport lock held. This | |
894 | * function will hold the rport lock, call an _enter_* | |
895 | * function and then unlock the rport. | |
896 | */ | |
897 | void fc_rport_recv_req(struct fc_seq *sp, struct fc_frame *fp, | |
9fb9d328 | 898 | struct fc_rport_priv *rdata) |
42e9a92f | 899 | { |
42e9a92f RL |
900 | struct fc_lport *lport = rdata->local_port; |
901 | ||
902 | struct fc_frame_header *fh; | |
903 | struct fc_seq_els_data els_data; | |
904 | u8 op; | |
905 | ||
906 | mutex_lock(&rdata->rp_mutex); | |
907 | ||
908 | els_data.fp = NULL; | |
909 | els_data.explan = ELS_EXPL_NONE; | |
910 | els_data.reason = ELS_RJT_NONE; | |
911 | ||
912 | fh = fc_frame_header_get(fp); | |
913 | ||
914 | if (fh->fh_r_ctl == FC_RCTL_ELS_REQ && fh->fh_type == FC_TYPE_ELS) { | |
915 | op = fc_frame_payload_op(fp); | |
916 | switch (op) { | |
917 | case ELS_PLOGI: | |
9fb9d328 | 918 | fc_rport_recv_plogi_req(rdata, sp, fp); |
42e9a92f RL |
919 | break; |
920 | case ELS_PRLI: | |
9fb9d328 | 921 | fc_rport_recv_prli_req(rdata, sp, fp); |
42e9a92f RL |
922 | break; |
923 | case ELS_PRLO: | |
9fb9d328 | 924 | fc_rport_recv_prlo_req(rdata, sp, fp); |
42e9a92f RL |
925 | break; |
926 | case ELS_LOGO: | |
9fb9d328 | 927 | fc_rport_recv_logo_req(rdata, sp, fp); |
42e9a92f RL |
928 | break; |
929 | case ELS_RRQ: | |
930 | els_data.fp = fp; | |
931 | lport->tt.seq_els_rsp_send(sp, ELS_RRQ, &els_data); | |
932 | break; | |
933 | case ELS_REC: | |
934 | els_data.fp = fp; | |
935 | lport->tt.seq_els_rsp_send(sp, ELS_REC, &els_data); | |
936 | break; | |
937 | default: | |
938 | els_data.reason = ELS_RJT_UNSUP; | |
939 | lport->tt.seq_els_rsp_send(sp, ELS_LS_RJT, &els_data); | |
940 | break; | |
941 | } | |
942 | } | |
943 | ||
944 | mutex_unlock(&rdata->rp_mutex); | |
945 | } | |
946 | ||
947 | /** | |
34f42a07 | 948 | * fc_rport_recv_plogi_req() - Handle incoming Port Login (PLOGI) request |
9fb9d328 | 949 | * @rdata: private remote port data |
42e9a92f RL |
950 | * @sp: current sequence in the PLOGI exchange |
951 | * @fp: PLOGI request frame | |
952 | * | |
953 | * Locking Note: The rport lock is exected to be held before calling | |
954 | * this function. | |
955 | */ | |
9fb9d328 | 956 | static void fc_rport_recv_plogi_req(struct fc_rport_priv *rdata, |
42e9a92f RL |
957 | struct fc_seq *sp, struct fc_frame *rx_fp) |
958 | { | |
9fb9d328 | 959 | struct fc_rport *rport = PRIV_TO_RPORT(rdata); |
42e9a92f RL |
960 | struct fc_lport *lport = rdata->local_port; |
961 | struct fc_frame *fp = rx_fp; | |
962 | struct fc_exch *ep; | |
963 | struct fc_frame_header *fh; | |
964 | struct fc_els_flogi *pl; | |
965 | struct fc_seq_els_data rjt_data; | |
966 | u32 sid; | |
967 | u64 wwpn; | |
968 | u64 wwnn; | |
969 | enum fc_els_rjt_reason reject = 0; | |
970 | u32 f_ctl; | |
971 | rjt_data.fp = NULL; | |
972 | ||
973 | fh = fc_frame_header_get(fp); | |
974 | ||
9fb9d328 JE |
975 | FC_RPORT_DBG(rdata, "Received PLOGI request while in state %s\n", |
976 | fc_rport_state(rdata)); | |
42e9a92f RL |
977 | |
978 | sid = ntoh24(fh->fh_s_id); | |
979 | pl = fc_frame_payload_get(fp, sizeof(*pl)); | |
980 | if (!pl) { | |
9fb9d328 | 981 | FC_RPORT_DBG(rdata, "Received PLOGI too short\n"); |
42e9a92f RL |
982 | WARN_ON(1); |
983 | /* XXX TBD: send reject? */ | |
984 | fc_frame_free(fp); | |
985 | return; | |
986 | } | |
987 | wwpn = get_unaligned_be64(&pl->fl_wwpn); | |
988 | wwnn = get_unaligned_be64(&pl->fl_wwnn); | |
989 | ||
990 | /* | |
991 | * If the session was just created, possibly due to the incoming PLOGI, | |
992 | * set the state appropriately and accept the PLOGI. | |
993 | * | |
994 | * If we had also sent a PLOGI, and if the received PLOGI is from a | |
995 | * higher WWPN, we accept it, otherwise an LS_RJT is sent with reason | |
996 | * "command already in progress". | |
997 | * | |
998 | * XXX TBD: If the session was ready before, the PLOGI should result in | |
999 | * all outstanding exchanges being reset. | |
1000 | */ | |
1001 | switch (rdata->rp_state) { | |
1002 | case RPORT_ST_INIT: | |
9fb9d328 | 1003 | FC_RPORT_DBG(rdata, "Received PLOGI, wwpn %llx state INIT " |
7414705e | 1004 | "- reject\n", (unsigned long long)wwpn); |
42e9a92f RL |
1005 | reject = ELS_RJT_UNSUP; |
1006 | break; | |
1007 | case RPORT_ST_PLOGI: | |
9fb9d328 | 1008 | FC_RPORT_DBG(rdata, "Received PLOGI in PLOGI state %d\n", |
7414705e | 1009 | rdata->rp_state); |
42e9a92f RL |
1010 | if (wwpn < lport->wwpn) |
1011 | reject = ELS_RJT_INPROG; | |
1012 | break; | |
1013 | case RPORT_ST_PRLI: | |
1014 | case RPORT_ST_READY: | |
9fb9d328 | 1015 | FC_RPORT_DBG(rdata, "Received PLOGI in logged-in state %d " |
7414705e | 1016 | "- ignored for now\n", rdata->rp_state); |
42e9a92f RL |
1017 | /* XXX TBD - should reset */ |
1018 | break; | |
14194054 | 1019 | case RPORT_ST_DELETE: |
42e9a92f | 1020 | default: |
9fb9d328 | 1021 | FC_RPORT_DBG(rdata, "Received PLOGI in unexpected " |
7414705e | 1022 | "state %d\n", rdata->rp_state); |
b4c6f546 AJ |
1023 | fc_frame_free(fp); |
1024 | return; | |
42e9a92f RL |
1025 | break; |
1026 | } | |
1027 | ||
1028 | if (reject) { | |
1029 | rjt_data.reason = reject; | |
1030 | rjt_data.explan = ELS_EXPL_NONE; | |
1031 | lport->tt.seq_els_rsp_send(sp, ELS_LS_RJT, &rjt_data); | |
1032 | fc_frame_free(fp); | |
1033 | } else { | |
1034 | fp = fc_frame_alloc(lport, sizeof(*pl)); | |
1035 | if (fp == NULL) { | |
1036 | fp = rx_fp; | |
1037 | rjt_data.reason = ELS_RJT_UNAB; | |
1038 | rjt_data.explan = ELS_EXPL_NONE; | |
1039 | lport->tt.seq_els_rsp_send(sp, ELS_LS_RJT, &rjt_data); | |
1040 | fc_frame_free(fp); | |
1041 | } else { | |
1042 | sp = lport->tt.seq_start_next(sp); | |
1043 | WARN_ON(!sp); | |
1044 | fc_rport_set_name(rport, wwpn, wwnn); | |
1045 | ||
1046 | /* | |
1047 | * Get session payload size from incoming PLOGI. | |
1048 | */ | |
1049 | rport->maxframe_size = | |
1050 | fc_plogi_get_maxframe(pl, lport->mfs); | |
1051 | fc_frame_free(rx_fp); | |
1052 | fc_plogi_fill(lport, fp, ELS_LS_ACC); | |
1053 | ||
1054 | /* | |
1055 | * Send LS_ACC. If this fails, | |
1056 | * the originator should retry. | |
1057 | */ | |
1058 | f_ctl = FC_FC_EX_CTX | FC_FC_LAST_SEQ; | |
1059 | f_ctl |= FC_FC_END_SEQ | FC_FC_SEQ_INIT; | |
1060 | ep = fc_seq_exch(sp); | |
1061 | fc_fill_fc_hdr(fp, FC_RCTL_ELS_REP, ep->did, ep->sid, | |
1062 | FC_TYPE_ELS, f_ctl, 0); | |
1063 | lport->tt.seq_send(lport, sp, fp); | |
1064 | if (rdata->rp_state == RPORT_ST_PLOGI) | |
9fb9d328 | 1065 | fc_rport_enter_prli(rdata); |
42e9a92f RL |
1066 | } |
1067 | } | |
1068 | } | |
1069 | ||
1070 | /** | |
34f42a07 | 1071 | * fc_rport_recv_prli_req() - Handle incoming Process Login (PRLI) request |
9fb9d328 | 1072 | * @rdata: private remote port data |
42e9a92f RL |
1073 | * @sp: current sequence in the PRLI exchange |
1074 | * @fp: PRLI request frame | |
1075 | * | |
1076 | * Locking Note: The rport lock is exected to be held before calling | |
1077 | * this function. | |
1078 | */ | |
9fb9d328 | 1079 | static void fc_rport_recv_prli_req(struct fc_rport_priv *rdata, |
42e9a92f RL |
1080 | struct fc_seq *sp, struct fc_frame *rx_fp) |
1081 | { | |
9fb9d328 | 1082 | struct fc_rport *rport = PRIV_TO_RPORT(rdata); |
42e9a92f RL |
1083 | struct fc_lport *lport = rdata->local_port; |
1084 | struct fc_exch *ep; | |
1085 | struct fc_frame *fp; | |
1086 | struct fc_frame_header *fh; | |
1087 | struct { | |
1088 | struct fc_els_prli prli; | |
1089 | struct fc_els_spp spp; | |
1090 | } *pp; | |
1091 | struct fc_els_spp *rspp; /* request service param page */ | |
1092 | struct fc_els_spp *spp; /* response spp */ | |
1093 | unsigned int len; | |
1094 | unsigned int plen; | |
1095 | enum fc_els_rjt_reason reason = ELS_RJT_UNAB; | |
1096 | enum fc_els_rjt_explan explan = ELS_EXPL_NONE; | |
1097 | enum fc_els_spp_resp resp; | |
1098 | struct fc_seq_els_data rjt_data; | |
1099 | u32 f_ctl; | |
1100 | u32 fcp_parm; | |
1101 | u32 roles = FC_RPORT_ROLE_UNKNOWN; | |
1102 | rjt_data.fp = NULL; | |
1103 | ||
1104 | fh = fc_frame_header_get(rx_fp); | |
1105 | ||
9fb9d328 JE |
1106 | FC_RPORT_DBG(rdata, "Received PRLI request while in state %s\n", |
1107 | fc_rport_state(rdata)); | |
42e9a92f RL |
1108 | |
1109 | switch (rdata->rp_state) { | |
1110 | case RPORT_ST_PRLI: | |
1111 | case RPORT_ST_READY: | |
1112 | reason = ELS_RJT_NONE; | |
1113 | break; | |
1114 | default: | |
b4c6f546 AJ |
1115 | fc_frame_free(rx_fp); |
1116 | return; | |
42e9a92f RL |
1117 | break; |
1118 | } | |
1119 | len = fr_len(rx_fp) - sizeof(*fh); | |
1120 | pp = fc_frame_payload_get(rx_fp, sizeof(*pp)); | |
1121 | if (pp == NULL) { | |
1122 | reason = ELS_RJT_PROT; | |
1123 | explan = ELS_EXPL_INV_LEN; | |
1124 | } else { | |
1125 | plen = ntohs(pp->prli.prli_len); | |
1126 | if ((plen % 4) != 0 || plen > len) { | |
1127 | reason = ELS_RJT_PROT; | |
1128 | explan = ELS_EXPL_INV_LEN; | |
1129 | } else if (plen < len) { | |
1130 | len = plen; | |
1131 | } | |
1132 | plen = pp->prli.prli_spp_len; | |
1133 | if ((plen % 4) != 0 || plen < sizeof(*spp) || | |
1134 | plen > len || len < sizeof(*pp)) { | |
1135 | reason = ELS_RJT_PROT; | |
1136 | explan = ELS_EXPL_INV_LEN; | |
1137 | } | |
1138 | rspp = &pp->spp; | |
1139 | } | |
1140 | if (reason != ELS_RJT_NONE || | |
1141 | (fp = fc_frame_alloc(lport, len)) == NULL) { | |
1142 | rjt_data.reason = reason; | |
1143 | rjt_data.explan = explan; | |
1144 | lport->tt.seq_els_rsp_send(sp, ELS_LS_RJT, &rjt_data); | |
1145 | } else { | |
1146 | sp = lport->tt.seq_start_next(sp); | |
1147 | WARN_ON(!sp); | |
1148 | pp = fc_frame_payload_get(fp, len); | |
1149 | WARN_ON(!pp); | |
1150 | memset(pp, 0, len); | |
1151 | pp->prli.prli_cmd = ELS_LS_ACC; | |
1152 | pp->prli.prli_spp_len = plen; | |
1153 | pp->prli.prli_len = htons(len); | |
1154 | len -= sizeof(struct fc_els_prli); | |
1155 | ||
1156 | /* | |
1157 | * Go through all the service parameter pages and build | |
1158 | * response. If plen indicates longer SPP than standard, | |
1159 | * use that. The entire response has been pre-cleared above. | |
1160 | */ | |
1161 | spp = &pp->spp; | |
1162 | while (len >= plen) { | |
1163 | spp->spp_type = rspp->spp_type; | |
1164 | spp->spp_type_ext = rspp->spp_type_ext; | |
1165 | spp->spp_flags = rspp->spp_flags & FC_SPP_EST_IMG_PAIR; | |
1166 | resp = FC_SPP_RESP_ACK; | |
1167 | if (rspp->spp_flags & FC_SPP_RPA_VAL) | |
1168 | resp = FC_SPP_RESP_NO_PA; | |
1169 | switch (rspp->spp_type) { | |
1170 | case 0: /* common to all FC-4 types */ | |
1171 | break; | |
1172 | case FC_TYPE_FCP: | |
1173 | fcp_parm = ntohl(rspp->spp_params); | |
1174 | if (fcp_parm * FCP_SPPF_RETRY) | |
1175 | rdata->flags |= FC_RP_FLAGS_RETRY; | |
1176 | rport->supported_classes = FC_COS_CLASS3; | |
1177 | if (fcp_parm & FCP_SPPF_INIT_FCN) | |
1178 | roles |= FC_RPORT_ROLE_FCP_INITIATOR; | |
1179 | if (fcp_parm & FCP_SPPF_TARG_FCN) | |
1180 | roles |= FC_RPORT_ROLE_FCP_TARGET; | |
1181 | rport->roles = roles; | |
1182 | ||
1183 | spp->spp_params = | |
1184 | htonl(lport->service_params); | |
1185 | break; | |
1186 | default: | |
1187 | resp = FC_SPP_RESP_INVL; | |
1188 | break; | |
1189 | } | |
1190 | spp->spp_flags |= resp; | |
1191 | len -= plen; | |
1192 | rspp = (struct fc_els_spp *)((char *)rspp + plen); | |
1193 | spp = (struct fc_els_spp *)((char *)spp + plen); | |
1194 | } | |
1195 | ||
1196 | /* | |
1197 | * Send LS_ACC. If this fails, the originator should retry. | |
1198 | */ | |
1199 | f_ctl = FC_FC_EX_CTX | FC_FC_LAST_SEQ; | |
1200 | f_ctl |= FC_FC_END_SEQ | FC_FC_SEQ_INIT; | |
1201 | ep = fc_seq_exch(sp); | |
1202 | fc_fill_fc_hdr(fp, FC_RCTL_ELS_REP, ep->did, ep->sid, | |
1203 | FC_TYPE_ELS, f_ctl, 0); | |
1204 | lport->tt.seq_send(lport, sp, fp); | |
1205 | ||
1206 | /* | |
1207 | * Get lock and re-check state. | |
1208 | */ | |
1209 | switch (rdata->rp_state) { | |
1210 | case RPORT_ST_PRLI: | |
9fb9d328 | 1211 | fc_rport_enter_ready(rdata); |
42e9a92f RL |
1212 | break; |
1213 | case RPORT_ST_READY: | |
1214 | break; | |
1215 | default: | |
1216 | break; | |
1217 | } | |
1218 | } | |
1219 | fc_frame_free(rx_fp); | |
1220 | } | |
1221 | ||
1222 | /** | |
34f42a07 | 1223 | * fc_rport_recv_prlo_req() - Handle incoming Process Logout (PRLO) request |
9fb9d328 | 1224 | * @rdata: private remote port data |
42e9a92f RL |
1225 | * @sp: current sequence in the PRLO exchange |
1226 | * @fp: PRLO request frame | |
1227 | * | |
1228 | * Locking Note: The rport lock is exected to be held before calling | |
1229 | * this function. | |
1230 | */ | |
9fb9d328 JE |
1231 | static void fc_rport_recv_prlo_req(struct fc_rport_priv *rdata, |
1232 | struct fc_seq *sp, | |
42e9a92f RL |
1233 | struct fc_frame *fp) |
1234 | { | |
42e9a92f RL |
1235 | struct fc_lport *lport = rdata->local_port; |
1236 | ||
1237 | struct fc_frame_header *fh; | |
1238 | struct fc_seq_els_data rjt_data; | |
1239 | ||
1240 | fh = fc_frame_header_get(fp); | |
1241 | ||
9fb9d328 JE |
1242 | FC_RPORT_DBG(rdata, "Received PRLO request while in state %s\n", |
1243 | fc_rport_state(rdata)); | |
42e9a92f | 1244 | |
14194054 | 1245 | if (rdata->rp_state == RPORT_ST_DELETE) { |
b4c6f546 AJ |
1246 | fc_frame_free(fp); |
1247 | return; | |
1248 | } | |
1249 | ||
42e9a92f RL |
1250 | rjt_data.fp = NULL; |
1251 | rjt_data.reason = ELS_RJT_UNAB; | |
1252 | rjt_data.explan = ELS_EXPL_NONE; | |
1253 | lport->tt.seq_els_rsp_send(sp, ELS_LS_RJT, &rjt_data); | |
1254 | fc_frame_free(fp); | |
1255 | } | |
1256 | ||
1257 | /** | |
34f42a07 | 1258 | * fc_rport_recv_logo_req() - Handle incoming Logout (LOGO) request |
9fb9d328 | 1259 | * @rdata: private remote port data |
42e9a92f RL |
1260 | * @sp: current sequence in the LOGO exchange |
1261 | * @fp: LOGO request frame | |
1262 | * | |
1263 | * Locking Note: The rport lock is exected to be held before calling | |
1264 | * this function. | |
1265 | */ | |
9fb9d328 JE |
1266 | static void fc_rport_recv_logo_req(struct fc_rport_priv *rdata, |
1267 | struct fc_seq *sp, | |
42e9a92f RL |
1268 | struct fc_frame *fp) |
1269 | { | |
1270 | struct fc_frame_header *fh; | |
42e9a92f RL |
1271 | struct fc_lport *lport = rdata->local_port; |
1272 | ||
1273 | fh = fc_frame_header_get(fp); | |
1274 | ||
9fb9d328 JE |
1275 | FC_RPORT_DBG(rdata, "Received LOGO request while in state %s\n", |
1276 | fc_rport_state(rdata)); | |
42e9a92f | 1277 | |
14194054 | 1278 | if (rdata->rp_state == RPORT_ST_DELETE) { |
b4c6f546 AJ |
1279 | fc_frame_free(fp); |
1280 | return; | |
1281 | } | |
1282 | ||
42e9a92f | 1283 | rdata->event = RPORT_EV_LOGO; |
9fb9d328 | 1284 | fc_rport_state_enter(rdata, RPORT_ST_DELETE); |
42e9a92f RL |
1285 | queue_work(rport_event_queue, &rdata->event_work); |
1286 | ||
1287 | lport->tt.seq_els_rsp_send(sp, ELS_LS_ACC, NULL); | |
1288 | fc_frame_free(fp); | |
1289 | } | |
1290 | ||
1291 | static void fc_rport_flush_queue(void) | |
1292 | { | |
1293 | flush_workqueue(rport_event_queue); | |
1294 | } | |
1295 | ||
42e9a92f RL |
1296 | int fc_rport_init(struct fc_lport *lport) |
1297 | { | |
5101ff99 RL |
1298 | if (!lport->tt.rport_create) |
1299 | lport->tt.rport_create = fc_rport_rogue_create; | |
1300 | ||
42e9a92f RL |
1301 | if (!lport->tt.rport_login) |
1302 | lport->tt.rport_login = fc_rport_login; | |
1303 | ||
1304 | if (!lport->tt.rport_logoff) | |
1305 | lport->tt.rport_logoff = fc_rport_logoff; | |
1306 | ||
1307 | if (!lport->tt.rport_recv_req) | |
1308 | lport->tt.rport_recv_req = fc_rport_recv_req; | |
1309 | ||
1310 | if (!lport->tt.rport_flush_queue) | |
1311 | lport->tt.rport_flush_queue = fc_rport_flush_queue; | |
1312 | ||
1313 | return 0; | |
1314 | } | |
1315 | EXPORT_SYMBOL(fc_rport_init); | |
1316 | ||
b0d428ad | 1317 | int fc_setup_rport(void) |
42e9a92f RL |
1318 | { |
1319 | rport_event_queue = create_singlethread_workqueue("fc_rport_eq"); | |
1320 | if (!rport_event_queue) | |
1321 | return -ENOMEM; | |
1322 | return 0; | |
1323 | } | |
1324 | EXPORT_SYMBOL(fc_setup_rport); | |
1325 | ||
b0d428ad | 1326 | void fc_destroy_rport(void) |
42e9a92f RL |
1327 | { |
1328 | destroy_workqueue(rport_event_queue); | |
1329 | } | |
1330 | EXPORT_SYMBOL(fc_destroy_rport); | |
1331 | ||
1332 | void fc_rport_terminate_io(struct fc_rport *rport) | |
1333 | { | |
ab28f1fd JE |
1334 | struct fc_rport_libfc_priv *rp = rport->dd_data; |
1335 | struct fc_lport *lport = rp->local_port; | |
42e9a92f | 1336 | |
1f6ff364 AJ |
1337 | lport->tt.exch_mgr_reset(lport, 0, rport->port_id); |
1338 | lport->tt.exch_mgr_reset(lport, rport->port_id, 0); | |
42e9a92f RL |
1339 | } |
1340 | EXPORT_SYMBOL(fc_rport_terminate_io); |