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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 *); | |
370c3bd0 | 65 | static void fc_rport_enter_adisc(struct fc_rport_priv *); |
42e9a92f | 66 | |
3ac6f98f | 67 | static void fc_rport_recv_plogi_req(struct fc_lport *, |
42e9a92f | 68 | struct fc_seq *, struct fc_frame *); |
9fb9d328 | 69 | static void fc_rport_recv_prli_req(struct fc_rport_priv *, |
42e9a92f | 70 | struct fc_seq *, struct fc_frame *); |
9fb9d328 | 71 | static void fc_rport_recv_prlo_req(struct fc_rport_priv *, |
42e9a92f | 72 | struct fc_seq *, struct fc_frame *); |
83fe6a93 | 73 | static void fc_rport_recv_logo_req(struct fc_lport *, |
42e9a92f RL |
74 | struct fc_seq *, struct fc_frame *); |
75 | static void fc_rport_timeout(struct work_struct *); | |
9fb9d328 JE |
76 | static void fc_rport_error(struct fc_rport_priv *, struct fc_frame *); |
77 | static void fc_rport_error_retry(struct fc_rport_priv *, struct fc_frame *); | |
42e9a92f RL |
78 | static void fc_rport_work(struct work_struct *); |
79 | ||
80 | static const char *fc_rport_state_names[] = { | |
42e9a92f RL |
81 | [RPORT_ST_INIT] = "Init", |
82 | [RPORT_ST_PLOGI] = "PLOGI", | |
83 | [RPORT_ST_PRLI] = "PRLI", | |
84 | [RPORT_ST_RTV] = "RTV", | |
85 | [RPORT_ST_READY] = "Ready", | |
86 | [RPORT_ST_LOGO] = "LOGO", | |
370c3bd0 | 87 | [RPORT_ST_ADISC] = "ADISC", |
14194054 | 88 | [RPORT_ST_DELETE] = "Delete", |
b4a9c7ed | 89 | [RPORT_ST_RESTART] = "Restart", |
42e9a92f RL |
90 | }; |
91 | ||
8025b5db JE |
92 | /** |
93 | * fc_rport_lookup() - lookup a remote port by port_id | |
94 | * @lport: Fibre Channel host port instance | |
95 | * @port_id: remote port port_id to match | |
96 | */ | |
97 | static struct fc_rport_priv *fc_rport_lookup(const struct fc_lport *lport, | |
98 | u32 port_id) | |
99 | { | |
100 | struct fc_rport_priv *rdata; | |
101 | ||
102 | list_for_each_entry(rdata, &lport->disc.rports, peers) | |
b4a9c7ed | 103 | if (rdata->ids.port_id == port_id) |
8025b5db JE |
104 | return rdata; |
105 | return NULL; | |
106 | } | |
107 | ||
9e9d0452 | 108 | /** |
9737e6a7 RL |
109 | * fc_rport_create() - Create a new remote port |
110 | * @lport: The local port that the new remote port is for | |
111 | * @port_id: The port ID for the new remote port | |
9e9d0452 | 112 | * |
48f00902 | 113 | * Locking note: must be called with the disc_mutex held. |
9e9d0452 JE |
114 | */ |
115 | static struct fc_rport_priv *fc_rport_create(struct fc_lport *lport, | |
9737e6a7 | 116 | u32 port_id) |
42e9a92f | 117 | { |
ab28f1fd | 118 | struct fc_rport_priv *rdata; |
42e9a92f | 119 | |
9737e6a7 | 120 | rdata = lport->tt.rport_lookup(lport, port_id); |
19f97e3c JE |
121 | if (rdata) |
122 | return rdata; | |
123 | ||
9e9d0452 JE |
124 | rdata = kzalloc(sizeof(*rdata), GFP_KERNEL); |
125 | if (!rdata) | |
42e9a92f RL |
126 | return NULL; |
127 | ||
9737e6a7 RL |
128 | rdata->ids.node_name = -1; |
129 | rdata->ids.port_name = -1; | |
130 | rdata->ids.port_id = port_id; | |
131 | rdata->ids.roles = FC_RPORT_ROLE_UNKNOWN; | |
132 | ||
f211fa51 | 133 | kref_init(&rdata->kref); |
42e9a92f | 134 | mutex_init(&rdata->rp_mutex); |
795d86f5 | 135 | rdata->local_port = lport; |
42e9a92f RL |
136 | rdata->rp_state = RPORT_ST_INIT; |
137 | rdata->event = RPORT_EV_NONE; | |
138 | rdata->flags = FC_RP_FLAGS_REC_SUPPORTED; | |
795d86f5 JE |
139 | rdata->e_d_tov = lport->e_d_tov; |
140 | rdata->r_a_tov = lport->r_a_tov; | |
f211fa51 | 141 | rdata->maxframe_size = FC_MIN_MAX_PAYLOAD; |
42e9a92f RL |
142 | INIT_DELAYED_WORK(&rdata->retry_work, fc_rport_timeout); |
143 | INIT_WORK(&rdata->event_work, fc_rport_work); | |
9737e6a7 | 144 | if (port_id != FC_FID_DIR_SERV) |
48f00902 | 145 | list_add(&rdata->peers, &lport->disc.rports); |
9fb9d328 | 146 | return rdata; |
42e9a92f RL |
147 | } |
148 | ||
f211fa51 JE |
149 | /** |
150 | * fc_rport_destroy() - free a remote port after last reference is released. | |
151 | * @kref: pointer to kref inside struct fc_rport_priv | |
152 | */ | |
153 | static void fc_rport_destroy(struct kref *kref) | |
154 | { | |
155 | struct fc_rport_priv *rdata; | |
f211fa51 JE |
156 | |
157 | rdata = container_of(kref, struct fc_rport_priv, kref); | |
9e9d0452 | 158 | kfree(rdata); |
f211fa51 JE |
159 | } |
160 | ||
42e9a92f | 161 | /** |
34f42a07 | 162 | * fc_rport_state() - return a string for the state the rport is in |
9fb9d328 | 163 | * @rdata: remote port private data |
42e9a92f | 164 | */ |
9fb9d328 | 165 | static const char *fc_rport_state(struct fc_rport_priv *rdata) |
42e9a92f RL |
166 | { |
167 | const char *cp; | |
42e9a92f RL |
168 | |
169 | cp = fc_rport_state_names[rdata->rp_state]; | |
170 | if (!cp) | |
171 | cp = "Unknown"; | |
172 | return cp; | |
173 | } | |
174 | ||
175 | /** | |
34f42a07 | 176 | * fc_set_rport_loss_tmo() - Set the remote port loss timeout in seconds. |
42e9a92f RL |
177 | * @rport: Pointer to Fibre Channel remote port structure |
178 | * @timeout: timeout in seconds | |
179 | */ | |
180 | void fc_set_rport_loss_tmo(struct fc_rport *rport, u32 timeout) | |
181 | { | |
182 | if (timeout) | |
183 | rport->dev_loss_tmo = timeout + 5; | |
184 | else | |
185 | rport->dev_loss_tmo = 30; | |
186 | } | |
187 | EXPORT_SYMBOL(fc_set_rport_loss_tmo); | |
188 | ||
189 | /** | |
34f42a07 | 190 | * fc_plogi_get_maxframe() - Get max payload from the common service parameters |
42e9a92f RL |
191 | * @flp: FLOGI payload structure |
192 | * @maxval: upper limit, may be less than what is in the service parameters | |
193 | */ | |
b2ab99c9 RL |
194 | static unsigned int fc_plogi_get_maxframe(struct fc_els_flogi *flp, |
195 | unsigned int maxval) | |
42e9a92f RL |
196 | { |
197 | unsigned int mfs; | |
198 | ||
199 | /* | |
200 | * Get max payload from the common service parameters and the | |
201 | * class 3 receive data field size. | |
202 | */ | |
203 | mfs = ntohs(flp->fl_csp.sp_bb_data) & FC_SP_BB_DATA_MASK; | |
204 | if (mfs >= FC_SP_MIN_MAX_PAYLOAD && mfs < maxval) | |
205 | maxval = mfs; | |
206 | mfs = ntohs(flp->fl_cssp[3 - 1].cp_rdfs); | |
207 | if (mfs >= FC_SP_MIN_MAX_PAYLOAD && mfs < maxval) | |
208 | maxval = mfs; | |
209 | return maxval; | |
210 | } | |
211 | ||
212 | /** | |
34f42a07 | 213 | * fc_rport_state_enter() - Change the rport's state |
9fb9d328 | 214 | * @rdata: The rport whose state should change |
42e9a92f RL |
215 | * @new: The new state of the rport |
216 | * | |
217 | * Locking Note: Called with the rport lock held | |
218 | */ | |
9fb9d328 | 219 | static void fc_rport_state_enter(struct fc_rport_priv *rdata, |
42e9a92f RL |
220 | enum fc_rport_state new) |
221 | { | |
42e9a92f RL |
222 | if (rdata->rp_state != new) |
223 | rdata->retries = 0; | |
224 | rdata->rp_state = new; | |
225 | } | |
226 | ||
227 | static void fc_rport_work(struct work_struct *work) | |
228 | { | |
571f824c | 229 | u32 port_id; |
ab28f1fd JE |
230 | struct fc_rport_priv *rdata = |
231 | container_of(work, struct fc_rport_priv, event_work); | |
9e9d0452 | 232 | struct fc_rport_libfc_priv *rp; |
42e9a92f | 233 | enum fc_rport_event event; |
42e9a92f RL |
234 | struct fc_lport *lport = rdata->local_port; |
235 | struct fc_rport_operations *rport_ops; | |
629f4427 | 236 | struct fc_rport_identifiers ids; |
f211fa51 | 237 | struct fc_rport *rport; |
b4a9c7ed | 238 | int restart = 0; |
42e9a92f RL |
239 | |
240 | mutex_lock(&rdata->rp_mutex); | |
241 | event = rdata->event; | |
242 | rport_ops = rdata->ops; | |
f211fa51 | 243 | rport = rdata->rport; |
42e9a92f | 244 | |
9e9d0452 JE |
245 | FC_RPORT_DBG(rdata, "work event %u\n", event); |
246 | ||
629f4427 | 247 | switch (event) { |
4c0f62b5 | 248 | case RPORT_EV_READY: |
f211fa51 | 249 | ids = rdata->ids; |
5f7ea3b7 | 250 | rdata->event = RPORT_EV_NONE; |
9e9d0452 | 251 | kref_get(&rdata->kref); |
42e9a92f RL |
252 | mutex_unlock(&rdata->rp_mutex); |
253 | ||
9e9d0452 JE |
254 | if (!rport) |
255 | rport = fc_remote_port_add(lport->host, 0, &ids); | |
256 | if (!rport) { | |
257 | FC_RPORT_DBG(rdata, "Failed to add the rport\n"); | |
258 | lport->tt.rport_logoff(rdata); | |
259 | kref_put(&rdata->kref, lport->tt.rport_destroy); | |
260 | return; | |
42e9a92f | 261 | } |
9e9d0452 JE |
262 | mutex_lock(&rdata->rp_mutex); |
263 | if (rdata->rport) | |
264 | FC_RPORT_DBG(rdata, "rport already allocated\n"); | |
265 | rdata->rport = rport; | |
266 | rport->maxframe_size = rdata->maxframe_size; | |
267 | rport->supported_classes = rdata->supported_classes; | |
268 | ||
269 | rp = rport->dd_data; | |
270 | rp->local_port = lport; | |
271 | rp->rp_state = rdata->rp_state; | |
272 | rp->flags = rdata->flags; | |
273 | rp->e_d_tov = rdata->e_d_tov; | |
274 | rp->r_a_tov = rdata->r_a_tov; | |
275 | mutex_unlock(&rdata->rp_mutex); | |
276 | ||
8345592b | 277 | if (rport_ops && rport_ops->event_callback) { |
9e9d0452 | 278 | FC_RPORT_DBG(rdata, "callback ev %d\n", event); |
9fb9d328 | 279 | rport_ops->event_callback(lport, rdata, event); |
9e9d0452 JE |
280 | } |
281 | kref_put(&rdata->kref, lport->tt.rport_destroy); | |
629f4427 JE |
282 | break; |
283 | ||
284 | case RPORT_EV_FAILED: | |
285 | case RPORT_EV_LOGO: | |
286 | case RPORT_EV_STOP: | |
9e9d0452 | 287 | port_id = rdata->ids.port_id; |
42e9a92f | 288 | mutex_unlock(&rdata->rp_mutex); |
9e9d0452 | 289 | |
48f00902 | 290 | if (port_id != FC_FID_DIR_SERV) { |
b4a9c7ed JE |
291 | /* |
292 | * We must drop rp_mutex before taking disc_mutex. | |
293 | * Re-evaluate state to allow for restart. | |
294 | * A transition to RESTART state must only happen | |
295 | * while disc_mutex is held and rdata is on the list. | |
296 | */ | |
48f00902 | 297 | mutex_lock(&lport->disc.disc_mutex); |
b4a9c7ed JE |
298 | mutex_lock(&rdata->rp_mutex); |
299 | if (rdata->rp_state == RPORT_ST_RESTART) | |
300 | restart = 1; | |
301 | else | |
302 | list_del(&rdata->peers); | |
303 | mutex_unlock(&rdata->rp_mutex); | |
48f00902 JE |
304 | mutex_unlock(&lport->disc.disc_mutex); |
305 | } | |
306 | ||
8345592b | 307 | if (rport_ops && rport_ops->event_callback) { |
9e9d0452 | 308 | FC_RPORT_DBG(rdata, "callback ev %d\n", event); |
9fb9d328 | 309 | rport_ops->event_callback(lport, rdata, event); |
9e9d0452 | 310 | } |
201e5795 | 311 | cancel_delayed_work_sync(&rdata->retry_work); |
9e9d0452 JE |
312 | |
313 | /* | |
314 | * Reset any outstanding exchanges before freeing rport. | |
315 | */ | |
316 | lport->tt.exch_mgr_reset(lport, 0, port_id); | |
317 | lport->tt.exch_mgr_reset(lport, port_id, 0); | |
318 | ||
319 | if (rport) { | |
320 | rp = rport->dd_data; | |
321 | rp->rp_state = RPORT_ST_DELETE; | |
322 | mutex_lock(&rdata->rp_mutex); | |
323 | rdata->rport = NULL; | |
324 | mutex_unlock(&rdata->rp_mutex); | |
42e9a92f | 325 | fc_remote_port_delete(rport); |
571f824c | 326 | } |
b4a9c7ed JE |
327 | if (restart) { |
328 | mutex_lock(&rdata->rp_mutex); | |
329 | FC_RPORT_DBG(rdata, "work restart\n"); | |
330 | fc_rport_enter_plogi(rdata); | |
331 | mutex_unlock(&rdata->rp_mutex); | |
332 | } else | |
333 | kref_put(&rdata->kref, lport->tt.rport_destroy); | |
629f4427 JE |
334 | break; |
335 | ||
336 | default: | |
42e9a92f | 337 | mutex_unlock(&rdata->rp_mutex); |
629f4427 JE |
338 | break; |
339 | } | |
42e9a92f RL |
340 | } |
341 | ||
342 | /** | |
34f42a07 | 343 | * fc_rport_login() - Start the remote port login state machine |
9fb9d328 | 344 | * @rdata: private remote port |
42e9a92f RL |
345 | * |
346 | * Locking Note: Called without the rport lock held. This | |
347 | * function will hold the rport lock, call an _enter_* | |
348 | * function and then unlock the rport. | |
370c3bd0 JE |
349 | * |
350 | * This indicates the intent to be logged into the remote port. | |
351 | * If it appears we are already logged in, ADISC is used to verify | |
352 | * the setup. | |
42e9a92f | 353 | */ |
9fb9d328 | 354 | int fc_rport_login(struct fc_rport_priv *rdata) |
42e9a92f | 355 | { |
42e9a92f RL |
356 | mutex_lock(&rdata->rp_mutex); |
357 | ||
370c3bd0 JE |
358 | switch (rdata->rp_state) { |
359 | case RPORT_ST_READY: | |
360 | FC_RPORT_DBG(rdata, "ADISC port\n"); | |
361 | fc_rport_enter_adisc(rdata); | |
362 | break; | |
b4a9c7ed JE |
363 | case RPORT_ST_RESTART: |
364 | break; | |
365 | case RPORT_ST_DELETE: | |
366 | FC_RPORT_DBG(rdata, "Restart deleted port\n"); | |
367 | fc_rport_state_enter(rdata, RPORT_ST_RESTART); | |
368 | break; | |
370c3bd0 JE |
369 | default: |
370 | FC_RPORT_DBG(rdata, "Login to port\n"); | |
371 | fc_rport_enter_plogi(rdata); | |
372 | break; | |
373 | } | |
42e9a92f RL |
374 | mutex_unlock(&rdata->rp_mutex); |
375 | ||
376 | return 0; | |
377 | } | |
378 | ||
5f7ea3b7 JE |
379 | /** |
380 | * fc_rport_enter_delete() - schedule a remote port to be deleted. | |
9fb9d328 | 381 | * @rdata: private remote port |
5f7ea3b7 JE |
382 | * @event: event to report as the reason for deletion |
383 | * | |
384 | * Locking Note: Called with the rport lock held. | |
385 | * | |
386 | * Allow state change into DELETE only once. | |
387 | * | |
388 | * Call queue_work only if there's no event already pending. | |
389 | * Set the new event so that the old pending event will not occur. | |
390 | * Since we have the mutex, even if fc_rport_work() is already started, | |
391 | * it'll see the new event. | |
392 | */ | |
9fb9d328 | 393 | static void fc_rport_enter_delete(struct fc_rport_priv *rdata, |
5f7ea3b7 JE |
394 | enum fc_rport_event event) |
395 | { | |
5f7ea3b7 JE |
396 | if (rdata->rp_state == RPORT_ST_DELETE) |
397 | return; | |
398 | ||
9fb9d328 | 399 | FC_RPORT_DBG(rdata, "Delete port\n"); |
5f7ea3b7 | 400 | |
9fb9d328 | 401 | fc_rport_state_enter(rdata, RPORT_ST_DELETE); |
5f7ea3b7 JE |
402 | |
403 | if (rdata->event == RPORT_EV_NONE) | |
404 | queue_work(rport_event_queue, &rdata->event_work); | |
405 | rdata->event = event; | |
406 | } | |
407 | ||
42e9a92f | 408 | /** |
34f42a07 | 409 | * fc_rport_logoff() - Logoff and remove an rport |
9fb9d328 | 410 | * @rdata: private remote port |
42e9a92f RL |
411 | * |
412 | * Locking Note: Called without the rport lock held. This | |
413 | * function will hold the rport lock, call an _enter_* | |
414 | * function and then unlock the rport. | |
415 | */ | |
9fb9d328 | 416 | int fc_rport_logoff(struct fc_rport_priv *rdata) |
42e9a92f | 417 | { |
42e9a92f RL |
418 | mutex_lock(&rdata->rp_mutex); |
419 | ||
9fb9d328 | 420 | FC_RPORT_DBG(rdata, "Remove port\n"); |
42e9a92f | 421 | |
14194054 | 422 | if (rdata->rp_state == RPORT_ST_DELETE) { |
9fb9d328 | 423 | FC_RPORT_DBG(rdata, "Port in Delete state, not removing\n"); |
b4c6f546 AJ |
424 | goto out; |
425 | } | |
426 | ||
b4a9c7ed JE |
427 | if (rdata->rp_state == RPORT_ST_RESTART) |
428 | FC_RPORT_DBG(rdata, "Port in Restart state, deleting\n"); | |
429 | else | |
430 | fc_rport_enter_logo(rdata); | |
42e9a92f RL |
431 | |
432 | /* | |
14194054 | 433 | * Change the state to Delete so that we discard |
42e9a92f RL |
434 | * the response. |
435 | */ | |
9fb9d328 | 436 | fc_rport_enter_delete(rdata, RPORT_EV_STOP); |
b4c6f546 | 437 | out: |
b4a9c7ed | 438 | mutex_unlock(&rdata->rp_mutex); |
42e9a92f RL |
439 | return 0; |
440 | } | |
441 | ||
442 | /** | |
34f42a07 | 443 | * fc_rport_enter_ready() - The rport is ready |
9fb9d328 | 444 | * @rdata: private remote port |
42e9a92f RL |
445 | * |
446 | * Locking Note: The rport lock is expected to be held before calling | |
447 | * this routine. | |
448 | */ | |
9fb9d328 | 449 | static void fc_rport_enter_ready(struct fc_rport_priv *rdata) |
42e9a92f | 450 | { |
9fb9d328 | 451 | fc_rport_state_enter(rdata, RPORT_ST_READY); |
42e9a92f | 452 | |
9fb9d328 | 453 | FC_RPORT_DBG(rdata, "Port is Ready\n"); |
42e9a92f | 454 | |
5f7ea3b7 JE |
455 | if (rdata->event == RPORT_EV_NONE) |
456 | queue_work(rport_event_queue, &rdata->event_work); | |
4c0f62b5 | 457 | rdata->event = RPORT_EV_READY; |
42e9a92f RL |
458 | } |
459 | ||
460 | /** | |
34f42a07 | 461 | * fc_rport_timeout() - Handler for the retry_work timer. |
ab28f1fd | 462 | * @work: The work struct of the fc_rport_priv |
42e9a92f RL |
463 | * |
464 | * Locking Note: Called without the rport lock held. This | |
465 | * function will hold the rport lock, call an _enter_* | |
466 | * function and then unlock the rport. | |
467 | */ | |
468 | static void fc_rport_timeout(struct work_struct *work) | |
469 | { | |
ab28f1fd JE |
470 | struct fc_rport_priv *rdata = |
471 | container_of(work, struct fc_rport_priv, retry_work.work); | |
42e9a92f RL |
472 | |
473 | mutex_lock(&rdata->rp_mutex); | |
474 | ||
475 | switch (rdata->rp_state) { | |
476 | case RPORT_ST_PLOGI: | |
9fb9d328 | 477 | fc_rport_enter_plogi(rdata); |
42e9a92f RL |
478 | break; |
479 | case RPORT_ST_PRLI: | |
9fb9d328 | 480 | fc_rport_enter_prli(rdata); |
42e9a92f RL |
481 | break; |
482 | case RPORT_ST_RTV: | |
9fb9d328 | 483 | fc_rport_enter_rtv(rdata); |
42e9a92f RL |
484 | break; |
485 | case RPORT_ST_LOGO: | |
9fb9d328 | 486 | fc_rport_enter_logo(rdata); |
42e9a92f | 487 | break; |
370c3bd0 JE |
488 | case RPORT_ST_ADISC: |
489 | fc_rport_enter_adisc(rdata); | |
490 | break; | |
42e9a92f RL |
491 | case RPORT_ST_READY: |
492 | case RPORT_ST_INIT: | |
14194054 | 493 | case RPORT_ST_DELETE: |
b4a9c7ed | 494 | case RPORT_ST_RESTART: |
42e9a92f RL |
495 | break; |
496 | } | |
497 | ||
498 | mutex_unlock(&rdata->rp_mutex); | |
42e9a92f RL |
499 | } |
500 | ||
501 | /** | |
34f42a07 | 502 | * fc_rport_error() - Error handler, called once retries have been exhausted |
9fb9d328 | 503 | * @rdata: private remote port |
42e9a92f RL |
504 | * @fp: The frame pointer |
505 | * | |
42e9a92f RL |
506 | * Locking Note: The rport lock is expected to be held before |
507 | * calling this routine | |
508 | */ | |
9fb9d328 | 509 | static void fc_rport_error(struct fc_rport_priv *rdata, struct fc_frame *fp) |
42e9a92f | 510 | { |
9fb9d328 | 511 | FC_RPORT_DBG(rdata, "Error %ld in state %s, retries %d\n", |
cdbe6dfe JE |
512 | IS_ERR(fp) ? -PTR_ERR(fp) : 0, |
513 | fc_rport_state(rdata), rdata->retries); | |
42e9a92f | 514 | |
6755db1c CL |
515 | switch (rdata->rp_state) { |
516 | case RPORT_ST_PLOGI: | |
6755db1c | 517 | case RPORT_ST_LOGO: |
9fb9d328 | 518 | fc_rport_enter_delete(rdata, RPORT_EV_FAILED); |
6755db1c CL |
519 | break; |
520 | case RPORT_ST_RTV: | |
9fb9d328 | 521 | fc_rport_enter_ready(rdata); |
6755db1c | 522 | break; |
370c3bd0 JE |
523 | case RPORT_ST_PRLI: |
524 | case RPORT_ST_ADISC: | |
525 | fc_rport_enter_logo(rdata); | |
526 | break; | |
14194054 | 527 | case RPORT_ST_DELETE: |
b4a9c7ed | 528 | case RPORT_ST_RESTART: |
6755db1c CL |
529 | case RPORT_ST_READY: |
530 | case RPORT_ST_INIT: | |
531 | break; | |
42e9a92f RL |
532 | } |
533 | } | |
534 | ||
6755db1c | 535 | /** |
34f42a07 | 536 | * fc_rport_error_retry() - Error handler when retries are desired |
9fb9d328 | 537 | * @rdata: private remote port data |
6755db1c CL |
538 | * @fp: The frame pointer |
539 | * | |
540 | * If the error was an exchange timeout retry immediately, | |
541 | * otherwise wait for E_D_TOV. | |
542 | * | |
543 | * Locking Note: The rport lock is expected to be held before | |
544 | * calling this routine | |
545 | */ | |
9fb9d328 JE |
546 | static void fc_rport_error_retry(struct fc_rport_priv *rdata, |
547 | struct fc_frame *fp) | |
6755db1c | 548 | { |
6755db1c CL |
549 | unsigned long delay = FC_DEF_E_D_TOV; |
550 | ||
551 | /* make sure this isn't an FC_EX_CLOSED error, never retry those */ | |
552 | if (PTR_ERR(fp) == -FC_EX_CLOSED) | |
9fb9d328 | 553 | return fc_rport_error(rdata, fp); |
6755db1c | 554 | |
a3666955 | 555 | if (rdata->retries < rdata->local_port->max_rport_retry_count) { |
9fb9d328 JE |
556 | FC_RPORT_DBG(rdata, "Error %ld in state %s, retrying\n", |
557 | PTR_ERR(fp), fc_rport_state(rdata)); | |
6755db1c CL |
558 | rdata->retries++; |
559 | /* no additional delay on exchange timeouts */ | |
560 | if (PTR_ERR(fp) == -FC_EX_TIMEOUT) | |
561 | delay = 0; | |
6755db1c CL |
562 | schedule_delayed_work(&rdata->retry_work, delay); |
563 | return; | |
564 | } | |
565 | ||
9fb9d328 | 566 | return fc_rport_error(rdata, fp); |
6755db1c CL |
567 | } |
568 | ||
42e9a92f | 569 | /** |
34f42a07 | 570 | * fc_rport_plogi_recv_resp() - Handle incoming ELS PLOGI response |
42e9a92f RL |
571 | * @sp: current sequence in the PLOGI exchange |
572 | * @fp: response frame | |
9fb9d328 | 573 | * @rdata_arg: private remote port data |
42e9a92f RL |
574 | * |
575 | * Locking Note: This function will be called without the rport lock | |
576 | * held, but it will lock, call an _enter_* function or fc_rport_error | |
577 | * and then unlock the rport. | |
578 | */ | |
579 | static void fc_rport_plogi_resp(struct fc_seq *sp, struct fc_frame *fp, | |
9fb9d328 | 580 | void *rdata_arg) |
42e9a92f | 581 | { |
9fb9d328 | 582 | struct fc_rport_priv *rdata = rdata_arg; |
42e9a92f | 583 | struct fc_lport *lport = rdata->local_port; |
a29e7646 | 584 | struct fc_els_flogi *plp = NULL; |
42e9a92f RL |
585 | unsigned int tov; |
586 | u16 csp_seq; | |
587 | u16 cssp_seq; | |
588 | u8 op; | |
589 | ||
590 | mutex_lock(&rdata->rp_mutex); | |
591 | ||
f657d299 | 592 | FC_RPORT_DBG(rdata, "Received a PLOGI %s\n", fc_els_resp_type(fp)); |
42e9a92f RL |
593 | |
594 | if (rdata->rp_state != RPORT_ST_PLOGI) { | |
9fb9d328 JE |
595 | FC_RPORT_DBG(rdata, "Received a PLOGI response, but in state " |
596 | "%s\n", fc_rport_state(rdata)); | |
76f6804e AJ |
597 | if (IS_ERR(fp)) |
598 | goto err; | |
42e9a92f RL |
599 | goto out; |
600 | } | |
601 | ||
76f6804e | 602 | if (IS_ERR(fp)) { |
9fb9d328 | 603 | fc_rport_error_retry(rdata, fp); |
76f6804e AJ |
604 | goto err; |
605 | } | |
606 | ||
42e9a92f RL |
607 | op = fc_frame_payload_op(fp); |
608 | if (op == ELS_LS_ACC && | |
609 | (plp = fc_frame_payload_get(fp, sizeof(*plp))) != NULL) { | |
f211fa51 JE |
610 | rdata->ids.port_name = get_unaligned_be64(&plp->fl_wwpn); |
611 | rdata->ids.node_name = get_unaligned_be64(&plp->fl_wwnn); | |
42e9a92f RL |
612 | |
613 | tov = ntohl(plp->fl_csp.sp_e_d_tov); | |
614 | if (ntohs(plp->fl_csp.sp_features) & FC_SP_FT_EDTR) | |
615 | tov /= 1000; | |
616 | if (tov > rdata->e_d_tov) | |
617 | rdata->e_d_tov = tov; | |
618 | csp_seq = ntohs(plp->fl_csp.sp_tot_seq); | |
619 | cssp_seq = ntohs(plp->fl_cssp[3 - 1].cp_con_seq); | |
620 | if (cssp_seq < csp_seq) | |
621 | csp_seq = cssp_seq; | |
622 | rdata->max_seq = csp_seq; | |
f211fa51 | 623 | rdata->maxframe_size = fc_plogi_get_maxframe(plp, lport->mfs); |
3ac6f98f | 624 | fc_rport_enter_prli(rdata); |
42e9a92f | 625 | } else |
9fb9d328 | 626 | fc_rport_error_retry(rdata, fp); |
42e9a92f RL |
627 | |
628 | out: | |
629 | fc_frame_free(fp); | |
630 | err: | |
631 | mutex_unlock(&rdata->rp_mutex); | |
f211fa51 | 632 | kref_put(&rdata->kref, rdata->local_port->tt.rport_destroy); |
42e9a92f RL |
633 | } |
634 | ||
635 | /** | |
34f42a07 | 636 | * fc_rport_enter_plogi() - Send Port Login (PLOGI) request to peer |
9fb9d328 | 637 | * @rdata: private remote port data |
42e9a92f RL |
638 | * |
639 | * Locking Note: The rport lock is expected to be held before calling | |
640 | * this routine. | |
641 | */ | |
9fb9d328 | 642 | static void fc_rport_enter_plogi(struct fc_rport_priv *rdata) |
42e9a92f | 643 | { |
42e9a92f RL |
644 | struct fc_lport *lport = rdata->local_port; |
645 | struct fc_frame *fp; | |
646 | ||
9fb9d328 JE |
647 | FC_RPORT_DBG(rdata, "Port entered PLOGI state from %s state\n", |
648 | fc_rport_state(rdata)); | |
42e9a92f | 649 | |
9fb9d328 | 650 | fc_rport_state_enter(rdata, RPORT_ST_PLOGI); |
42e9a92f | 651 | |
f211fa51 | 652 | rdata->maxframe_size = FC_MIN_MAX_PAYLOAD; |
42e9a92f RL |
653 | fp = fc_frame_alloc(lport, sizeof(struct fc_els_flogi)); |
654 | if (!fp) { | |
9fb9d328 | 655 | fc_rport_error_retry(rdata, fp); |
42e9a92f RL |
656 | return; |
657 | } | |
658 | rdata->e_d_tov = lport->e_d_tov; | |
659 | ||
f211fa51 | 660 | if (!lport->tt.elsct_send(lport, rdata->ids.port_id, fp, ELS_PLOGI, |
9fb9d328 | 661 | fc_rport_plogi_resp, rdata, lport->e_d_tov)) |
8f550f93 | 662 | fc_rport_error_retry(rdata, NULL); |
42e9a92f | 663 | else |
f211fa51 | 664 | kref_get(&rdata->kref); |
42e9a92f RL |
665 | } |
666 | ||
667 | /** | |
34f42a07 | 668 | * fc_rport_prli_resp() - Process Login (PRLI) response handler |
42e9a92f RL |
669 | * @sp: current sequence in the PRLI exchange |
670 | * @fp: response frame | |
9fb9d328 | 671 | * @rdata_arg: private remote port data |
42e9a92f RL |
672 | * |
673 | * Locking Note: This function will be called without the rport lock | |
674 | * held, but it will lock, call an _enter_* function or fc_rport_error | |
675 | * and then unlock the rport. | |
676 | */ | |
677 | static void fc_rport_prli_resp(struct fc_seq *sp, struct fc_frame *fp, | |
9fb9d328 | 678 | void *rdata_arg) |
42e9a92f | 679 | { |
9fb9d328 | 680 | struct fc_rport_priv *rdata = rdata_arg; |
42e9a92f RL |
681 | struct { |
682 | struct fc_els_prli prli; | |
683 | struct fc_els_spp spp; | |
684 | } *pp; | |
685 | u32 roles = FC_RPORT_ROLE_UNKNOWN; | |
686 | u32 fcp_parm = 0; | |
687 | u8 op; | |
688 | ||
689 | mutex_lock(&rdata->rp_mutex); | |
690 | ||
f657d299 | 691 | FC_RPORT_DBG(rdata, "Received a PRLI %s\n", fc_els_resp_type(fp)); |
42e9a92f RL |
692 | |
693 | if (rdata->rp_state != RPORT_ST_PRLI) { | |
9fb9d328 JE |
694 | FC_RPORT_DBG(rdata, "Received a PRLI response, but in state " |
695 | "%s\n", fc_rport_state(rdata)); | |
76f6804e AJ |
696 | if (IS_ERR(fp)) |
697 | goto err; | |
42e9a92f RL |
698 | goto out; |
699 | } | |
700 | ||
76f6804e | 701 | if (IS_ERR(fp)) { |
9fb9d328 | 702 | fc_rport_error_retry(rdata, fp); |
76f6804e AJ |
703 | goto err; |
704 | } | |
705 | ||
6bd054cb RL |
706 | /* reinitialize remote port roles */ |
707 | rdata->ids.roles = FC_RPORT_ROLE_UNKNOWN; | |
708 | ||
42e9a92f RL |
709 | op = fc_frame_payload_op(fp); |
710 | if (op == ELS_LS_ACC) { | |
711 | pp = fc_frame_payload_get(fp, sizeof(*pp)); | |
712 | if (pp && pp->prli.prli_spp_len >= sizeof(pp->spp)) { | |
713 | fcp_parm = ntohl(pp->spp.spp_params); | |
714 | if (fcp_parm & FCP_SPPF_RETRY) | |
715 | rdata->flags |= FC_RP_FLAGS_RETRY; | |
716 | } | |
717 | ||
f211fa51 | 718 | rdata->supported_classes = FC_COS_CLASS3; |
42e9a92f RL |
719 | if (fcp_parm & FCP_SPPF_INIT_FCN) |
720 | roles |= FC_RPORT_ROLE_FCP_INITIATOR; | |
721 | if (fcp_parm & FCP_SPPF_TARG_FCN) | |
722 | roles |= FC_RPORT_ROLE_FCP_TARGET; | |
723 | ||
f211fa51 | 724 | rdata->ids.roles = roles; |
9fb9d328 | 725 | fc_rport_enter_rtv(rdata); |
42e9a92f RL |
726 | |
727 | } else { | |
9fb9d328 JE |
728 | FC_RPORT_DBG(rdata, "Bad ELS response for PRLI command\n"); |
729 | fc_rport_enter_delete(rdata, RPORT_EV_FAILED); | |
42e9a92f RL |
730 | } |
731 | ||
732 | out: | |
733 | fc_frame_free(fp); | |
734 | err: | |
735 | mutex_unlock(&rdata->rp_mutex); | |
f211fa51 | 736 | kref_put(&rdata->kref, rdata->local_port->tt.rport_destroy); |
42e9a92f RL |
737 | } |
738 | ||
739 | /** | |
34f42a07 | 740 | * fc_rport_logo_resp() - Logout (LOGO) response handler |
42e9a92f RL |
741 | * @sp: current sequence in the LOGO exchange |
742 | * @fp: response frame | |
9fb9d328 | 743 | * @rdata_arg: private remote port data |
42e9a92f RL |
744 | * |
745 | * Locking Note: This function will be called without the rport lock | |
746 | * held, but it will lock, call an _enter_* function or fc_rport_error | |
747 | * and then unlock the rport. | |
748 | */ | |
749 | static void fc_rport_logo_resp(struct fc_seq *sp, struct fc_frame *fp, | |
9fb9d328 | 750 | void *rdata_arg) |
42e9a92f | 751 | { |
9fb9d328 | 752 | struct fc_rport_priv *rdata = rdata_arg; |
42e9a92f RL |
753 | u8 op; |
754 | ||
755 | mutex_lock(&rdata->rp_mutex); | |
756 | ||
f657d299 | 757 | FC_RPORT_DBG(rdata, "Received a LOGO %s\n", fc_els_resp_type(fp)); |
42e9a92f | 758 | |
42e9a92f | 759 | if (rdata->rp_state != RPORT_ST_LOGO) { |
9fb9d328 JE |
760 | FC_RPORT_DBG(rdata, "Received a LOGO response, but in state " |
761 | "%s\n", fc_rport_state(rdata)); | |
76f6804e AJ |
762 | if (IS_ERR(fp)) |
763 | goto err; | |
42e9a92f RL |
764 | goto out; |
765 | } | |
766 | ||
76f6804e | 767 | if (IS_ERR(fp)) { |
9fb9d328 | 768 | fc_rport_error_retry(rdata, fp); |
76f6804e AJ |
769 | goto err; |
770 | } | |
771 | ||
42e9a92f | 772 | op = fc_frame_payload_op(fp); |
68a1750b JE |
773 | if (op != ELS_LS_ACC) |
774 | FC_RPORT_DBG(rdata, "Bad ELS response op %x for LOGO command\n", | |
775 | op); | |
776 | fc_rport_enter_delete(rdata, RPORT_EV_LOGO); | |
42e9a92f RL |
777 | |
778 | out: | |
779 | fc_frame_free(fp); | |
780 | err: | |
781 | mutex_unlock(&rdata->rp_mutex); | |
f211fa51 | 782 | kref_put(&rdata->kref, rdata->local_port->tt.rport_destroy); |
42e9a92f RL |
783 | } |
784 | ||
785 | /** | |
34f42a07 | 786 | * fc_rport_enter_prli() - Send Process Login (PRLI) request to peer |
9fb9d328 | 787 | * @rdata: private remote port data |
42e9a92f RL |
788 | * |
789 | * Locking Note: The rport lock is expected to be held before calling | |
790 | * this routine. | |
791 | */ | |
9fb9d328 | 792 | static void fc_rport_enter_prli(struct fc_rport_priv *rdata) |
42e9a92f | 793 | { |
42e9a92f RL |
794 | struct fc_lport *lport = rdata->local_port; |
795 | struct { | |
796 | struct fc_els_prli prli; | |
797 | struct fc_els_spp spp; | |
798 | } *pp; | |
799 | struct fc_frame *fp; | |
800 | ||
3ac6f98f JE |
801 | /* |
802 | * If the rport is one of the well known addresses | |
803 | * we skip PRLI and RTV and go straight to READY. | |
804 | */ | |
805 | if (rdata->ids.port_id >= FC_FID_DOM_MGR) { | |
806 | fc_rport_enter_ready(rdata); | |
807 | return; | |
808 | } | |
809 | ||
9fb9d328 JE |
810 | FC_RPORT_DBG(rdata, "Port entered PRLI state from %s state\n", |
811 | fc_rport_state(rdata)); | |
42e9a92f | 812 | |
9fb9d328 | 813 | fc_rport_state_enter(rdata, RPORT_ST_PRLI); |
42e9a92f RL |
814 | |
815 | fp = fc_frame_alloc(lport, sizeof(*pp)); | |
816 | if (!fp) { | |
9fb9d328 | 817 | fc_rport_error_retry(rdata, fp); |
42e9a92f RL |
818 | return; |
819 | } | |
820 | ||
f211fa51 | 821 | if (!lport->tt.elsct_send(lport, rdata->ids.port_id, fp, ELS_PRLI, |
9fb9d328 | 822 | fc_rport_prli_resp, rdata, lport->e_d_tov)) |
8f550f93 | 823 | fc_rport_error_retry(rdata, NULL); |
42e9a92f | 824 | else |
f211fa51 | 825 | kref_get(&rdata->kref); |
42e9a92f RL |
826 | } |
827 | ||
828 | /** | |
34f42a07 | 829 | * fc_rport_els_rtv_resp() - Request Timeout Value response handler |
42e9a92f RL |
830 | * @sp: current sequence in the RTV exchange |
831 | * @fp: response frame | |
9fb9d328 | 832 | * @rdata_arg: private remote port data |
42e9a92f RL |
833 | * |
834 | * Many targets don't seem to support this. | |
835 | * | |
836 | * Locking Note: This function will be called without the rport lock | |
837 | * held, but it will lock, call an _enter_* function or fc_rport_error | |
838 | * and then unlock the rport. | |
839 | */ | |
840 | static void fc_rport_rtv_resp(struct fc_seq *sp, struct fc_frame *fp, | |
9fb9d328 | 841 | void *rdata_arg) |
42e9a92f | 842 | { |
9fb9d328 | 843 | struct fc_rport_priv *rdata = rdata_arg; |
42e9a92f RL |
844 | u8 op; |
845 | ||
846 | mutex_lock(&rdata->rp_mutex); | |
847 | ||
f657d299 | 848 | FC_RPORT_DBG(rdata, "Received a RTV %s\n", fc_els_resp_type(fp)); |
42e9a92f RL |
849 | |
850 | if (rdata->rp_state != RPORT_ST_RTV) { | |
9fb9d328 JE |
851 | FC_RPORT_DBG(rdata, "Received a RTV response, but in state " |
852 | "%s\n", fc_rport_state(rdata)); | |
76f6804e AJ |
853 | if (IS_ERR(fp)) |
854 | goto err; | |
42e9a92f RL |
855 | goto out; |
856 | } | |
857 | ||
76f6804e | 858 | if (IS_ERR(fp)) { |
9fb9d328 | 859 | fc_rport_error(rdata, fp); |
76f6804e AJ |
860 | goto err; |
861 | } | |
862 | ||
42e9a92f RL |
863 | op = fc_frame_payload_op(fp); |
864 | if (op == ELS_LS_ACC) { | |
865 | struct fc_els_rtv_acc *rtv; | |
866 | u32 toq; | |
867 | u32 tov; | |
868 | ||
869 | rtv = fc_frame_payload_get(fp, sizeof(*rtv)); | |
870 | if (rtv) { | |
871 | toq = ntohl(rtv->rtv_toq); | |
872 | tov = ntohl(rtv->rtv_r_a_tov); | |
873 | if (tov == 0) | |
874 | tov = 1; | |
875 | rdata->r_a_tov = tov; | |
876 | tov = ntohl(rtv->rtv_e_d_tov); | |
877 | if (toq & FC_ELS_RTV_EDRES) | |
878 | tov /= 1000000; | |
879 | if (tov == 0) | |
880 | tov = 1; | |
881 | rdata->e_d_tov = tov; | |
882 | } | |
883 | } | |
884 | ||
9fb9d328 | 885 | fc_rport_enter_ready(rdata); |
42e9a92f RL |
886 | |
887 | out: | |
888 | fc_frame_free(fp); | |
889 | err: | |
890 | mutex_unlock(&rdata->rp_mutex); | |
f211fa51 | 891 | kref_put(&rdata->kref, rdata->local_port->tt.rport_destroy); |
42e9a92f RL |
892 | } |
893 | ||
894 | /** | |
34f42a07 | 895 | * fc_rport_enter_rtv() - Send Request Timeout Value (RTV) request to peer |
9fb9d328 | 896 | * @rdata: private remote port data |
42e9a92f RL |
897 | * |
898 | * Locking Note: The rport lock is expected to be held before calling | |
899 | * this routine. | |
900 | */ | |
9fb9d328 | 901 | static void fc_rport_enter_rtv(struct fc_rport_priv *rdata) |
42e9a92f RL |
902 | { |
903 | struct fc_frame *fp; | |
42e9a92f RL |
904 | struct fc_lport *lport = rdata->local_port; |
905 | ||
9fb9d328 JE |
906 | FC_RPORT_DBG(rdata, "Port entered RTV state from %s state\n", |
907 | fc_rport_state(rdata)); | |
42e9a92f | 908 | |
9fb9d328 | 909 | fc_rport_state_enter(rdata, RPORT_ST_RTV); |
42e9a92f RL |
910 | |
911 | fp = fc_frame_alloc(lport, sizeof(struct fc_els_rtv)); | |
912 | if (!fp) { | |
9fb9d328 | 913 | fc_rport_error_retry(rdata, fp); |
42e9a92f RL |
914 | return; |
915 | } | |
916 | ||
f211fa51 | 917 | if (!lport->tt.elsct_send(lport, rdata->ids.port_id, fp, ELS_RTV, |
9fb9d328 | 918 | fc_rport_rtv_resp, rdata, lport->e_d_tov)) |
8f550f93 | 919 | fc_rport_error_retry(rdata, NULL); |
42e9a92f | 920 | else |
f211fa51 | 921 | kref_get(&rdata->kref); |
42e9a92f RL |
922 | } |
923 | ||
924 | /** | |
34f42a07 | 925 | * fc_rport_enter_logo() - Send Logout (LOGO) request to peer |
9fb9d328 | 926 | * @rdata: private remote port data |
42e9a92f RL |
927 | * |
928 | * Locking Note: The rport lock is expected to be held before calling | |
929 | * this routine. | |
930 | */ | |
9fb9d328 | 931 | static void fc_rport_enter_logo(struct fc_rport_priv *rdata) |
42e9a92f | 932 | { |
42e9a92f RL |
933 | struct fc_lport *lport = rdata->local_port; |
934 | struct fc_frame *fp; | |
935 | ||
9fb9d328 JE |
936 | FC_RPORT_DBG(rdata, "Port entered LOGO state from %s state\n", |
937 | fc_rport_state(rdata)); | |
42e9a92f | 938 | |
9fb9d328 | 939 | fc_rport_state_enter(rdata, RPORT_ST_LOGO); |
42e9a92f RL |
940 | |
941 | fp = fc_frame_alloc(lport, sizeof(struct fc_els_logo)); | |
942 | if (!fp) { | |
9fb9d328 | 943 | fc_rport_error_retry(rdata, fp); |
42e9a92f RL |
944 | return; |
945 | } | |
946 | ||
f211fa51 | 947 | if (!lport->tt.elsct_send(lport, rdata->ids.port_id, fp, ELS_LOGO, |
9fb9d328 | 948 | fc_rport_logo_resp, rdata, lport->e_d_tov)) |
8f550f93 | 949 | fc_rport_error_retry(rdata, NULL); |
42e9a92f | 950 | else |
f211fa51 | 951 | kref_get(&rdata->kref); |
42e9a92f RL |
952 | } |
953 | ||
370c3bd0 JE |
954 | /** |
955 | * fc_rport_els_adisc_resp() - Address Discovery response handler | |
956 | * @sp: current sequence in the ADISC exchange | |
957 | * @fp: response frame | |
958 | * @rdata_arg: remote port private. | |
959 | * | |
960 | * Locking Note: This function will be called without the rport lock | |
961 | * held, but it will lock, call an _enter_* function or fc_rport_error | |
962 | * and then unlock the rport. | |
963 | */ | |
964 | static void fc_rport_adisc_resp(struct fc_seq *sp, struct fc_frame *fp, | |
965 | void *rdata_arg) | |
966 | { | |
967 | struct fc_rport_priv *rdata = rdata_arg; | |
968 | struct fc_els_adisc *adisc; | |
969 | u8 op; | |
970 | ||
971 | mutex_lock(&rdata->rp_mutex); | |
972 | ||
973 | FC_RPORT_DBG(rdata, "Received a ADISC response\n"); | |
974 | ||
975 | if (rdata->rp_state != RPORT_ST_ADISC) { | |
976 | FC_RPORT_DBG(rdata, "Received a ADISC resp but in state %s\n", | |
977 | fc_rport_state(rdata)); | |
978 | if (IS_ERR(fp)) | |
979 | goto err; | |
980 | goto out; | |
981 | } | |
982 | ||
983 | if (IS_ERR(fp)) { | |
984 | fc_rport_error(rdata, fp); | |
985 | goto err; | |
986 | } | |
987 | ||
988 | /* | |
989 | * If address verification failed. Consider us logged out of the rport. | |
990 | * Since the rport is still in discovery, we want to be | |
991 | * logged in, so go to PLOGI state. Otherwise, go back to READY. | |
992 | */ | |
993 | op = fc_frame_payload_op(fp); | |
994 | adisc = fc_frame_payload_get(fp, sizeof(*adisc)); | |
995 | if (op != ELS_LS_ACC || !adisc || | |
996 | ntoh24(adisc->adisc_port_id) != rdata->ids.port_id || | |
997 | get_unaligned_be64(&adisc->adisc_wwpn) != rdata->ids.port_name || | |
998 | get_unaligned_be64(&adisc->adisc_wwnn) != rdata->ids.node_name) { | |
999 | FC_RPORT_DBG(rdata, "ADISC error or mismatch\n"); | |
1000 | fc_rport_enter_plogi(rdata); | |
1001 | } else { | |
1002 | FC_RPORT_DBG(rdata, "ADISC OK\n"); | |
1003 | fc_rport_enter_ready(rdata); | |
1004 | } | |
1005 | out: | |
1006 | fc_frame_free(fp); | |
1007 | err: | |
1008 | mutex_unlock(&rdata->rp_mutex); | |
1009 | kref_put(&rdata->kref, rdata->local_port->tt.rport_destroy); | |
1010 | } | |
1011 | ||
1012 | /** | |
1013 | * fc_rport_enter_adisc() - Send Address Discover (ADISC) request to peer | |
1014 | * @rdata: remote port private data | |
1015 | * | |
1016 | * Locking Note: The rport lock is expected to be held before calling | |
1017 | * this routine. | |
1018 | */ | |
1019 | static void fc_rport_enter_adisc(struct fc_rport_priv *rdata) | |
1020 | { | |
1021 | struct fc_lport *lport = rdata->local_port; | |
1022 | struct fc_frame *fp; | |
1023 | ||
1024 | FC_RPORT_DBG(rdata, "sending ADISC from %s state\n", | |
1025 | fc_rport_state(rdata)); | |
1026 | ||
1027 | fc_rport_state_enter(rdata, RPORT_ST_ADISC); | |
1028 | ||
1029 | fp = fc_frame_alloc(lport, sizeof(struct fc_els_adisc)); | |
1030 | if (!fp) { | |
1031 | fc_rport_error_retry(rdata, fp); | |
1032 | return; | |
1033 | } | |
1034 | if (!lport->tt.elsct_send(lport, rdata->ids.port_id, fp, ELS_ADISC, | |
1035 | fc_rport_adisc_resp, rdata, lport->e_d_tov)) | |
8f550f93 | 1036 | fc_rport_error_retry(rdata, NULL); |
370c3bd0 JE |
1037 | else |
1038 | kref_get(&rdata->kref); | |
1039 | } | |
1040 | ||
8abbe3a4 JE |
1041 | /** |
1042 | * fc_rport_recv_adisc_req() - Handle incoming Address Discovery (ADISC) Request | |
1043 | * @rdata: remote port private | |
1044 | * @sp: current sequence in the ADISC exchange | |
1045 | * @in_fp: ADISC request frame | |
1046 | * | |
1047 | * Locking Note: Called with the lport and rport locks held. | |
1048 | */ | |
1049 | static void fc_rport_recv_adisc_req(struct fc_rport_priv *rdata, | |
1050 | struct fc_seq *sp, struct fc_frame *in_fp) | |
1051 | { | |
1052 | struct fc_lport *lport = rdata->local_port; | |
1053 | struct fc_frame *fp; | |
1054 | struct fc_exch *ep = fc_seq_exch(sp); | |
1055 | struct fc_els_adisc *adisc; | |
1056 | struct fc_seq_els_data rjt_data; | |
1057 | u32 f_ctl; | |
1058 | ||
1059 | FC_RPORT_DBG(rdata, "Received ADISC request\n"); | |
1060 | ||
1061 | adisc = fc_frame_payload_get(in_fp, sizeof(*adisc)); | |
1062 | if (!adisc) { | |
1063 | rjt_data.fp = NULL; | |
1064 | rjt_data.reason = ELS_RJT_PROT; | |
1065 | rjt_data.explan = ELS_EXPL_INV_LEN; | |
1066 | lport->tt.seq_els_rsp_send(sp, ELS_LS_RJT, &rjt_data); | |
1067 | goto drop; | |
1068 | } | |
1069 | ||
1070 | fp = fc_frame_alloc(lport, sizeof(*adisc)); | |
1071 | if (!fp) | |
1072 | goto drop; | |
1073 | fc_adisc_fill(lport, fp); | |
1074 | adisc = fc_frame_payload_get(fp, sizeof(*adisc)); | |
1075 | adisc->adisc_cmd = ELS_LS_ACC; | |
1076 | sp = lport->tt.seq_start_next(sp); | |
1077 | f_ctl = FC_FC_EX_CTX | FC_FC_LAST_SEQ | FC_FC_END_SEQ | FC_FC_SEQ_INIT; | |
1078 | fc_fill_fc_hdr(fp, FC_RCTL_ELS_REP, ep->did, ep->sid, | |
1079 | FC_TYPE_ELS, f_ctl, 0); | |
1080 | lport->tt.seq_send(lport, sp, fp); | |
1081 | drop: | |
1082 | fc_frame_free(in_fp); | |
1083 | } | |
1084 | ||
42e9a92f | 1085 | /** |
83fe6a93 JE |
1086 | * fc_rport_recv_els_req() - handle a validated ELS request. |
1087 | * @lport: Fibre Channel local port | |
42e9a92f RL |
1088 | * @sp: current sequence in the PLOGI exchange |
1089 | * @fp: response frame | |
83fe6a93 JE |
1090 | * |
1091 | * Handle incoming ELS requests that require port login. | |
1092 | * The ELS opcode has already been validated by the caller. | |
42e9a92f | 1093 | * |
131203a1 | 1094 | * Locking Note: Called with the lport lock held. |
42e9a92f | 1095 | */ |
83fe6a93 JE |
1096 | static void fc_rport_recv_els_req(struct fc_lport *lport, |
1097 | struct fc_seq *sp, struct fc_frame *fp) | |
42e9a92f | 1098 | { |
131203a1 | 1099 | struct fc_rport_priv *rdata; |
42e9a92f RL |
1100 | struct fc_frame_header *fh; |
1101 | struct fc_seq_els_data els_data; | |
42e9a92f | 1102 | |
42e9a92f | 1103 | els_data.fp = NULL; |
83fe6a93 JE |
1104 | els_data.reason = ELS_RJT_UNAB; |
1105 | els_data.explan = ELS_EXPL_PLOGI_REQD; | |
3ac6f98f | 1106 | |
42e9a92f RL |
1107 | fh = fc_frame_header_get(fp); |
1108 | ||
25b37b98 | 1109 | mutex_lock(&lport->disc.disc_mutex); |
83fe6a93 | 1110 | rdata = lport->tt.rport_lookup(lport, ntoh24(fh->fh_s_id)); |
131203a1 | 1111 | if (!rdata) { |
25b37b98 | 1112 | mutex_unlock(&lport->disc.disc_mutex); |
83fe6a93 | 1113 | goto reject; |
131203a1 JE |
1114 | } |
1115 | mutex_lock(&rdata->rp_mutex); | |
25b37b98 | 1116 | mutex_unlock(&lport->disc.disc_mutex); |
131203a1 | 1117 | |
83fe6a93 JE |
1118 | switch (rdata->rp_state) { |
1119 | case RPORT_ST_PRLI: | |
1120 | case RPORT_ST_RTV: | |
1121 | case RPORT_ST_READY: | |
370c3bd0 | 1122 | case RPORT_ST_ADISC: |
83fe6a93 JE |
1123 | break; |
1124 | default: | |
1125 | mutex_unlock(&rdata->rp_mutex); | |
1126 | goto reject; | |
1127 | } | |
1128 | ||
1129 | switch (fc_frame_payload_op(fp)) { | |
131203a1 JE |
1130 | case ELS_PRLI: |
1131 | fc_rport_recv_prli_req(rdata, sp, fp); | |
1132 | break; | |
1133 | case ELS_PRLO: | |
1134 | fc_rport_recv_prlo_req(rdata, sp, fp); | |
1135 | break; | |
8abbe3a4 JE |
1136 | case ELS_ADISC: |
1137 | fc_rport_recv_adisc_req(rdata, sp, fp); | |
1138 | break; | |
131203a1 JE |
1139 | case ELS_RRQ: |
1140 | els_data.fp = fp; | |
1141 | lport->tt.seq_els_rsp_send(sp, ELS_RRQ, &els_data); | |
1142 | break; | |
1143 | case ELS_REC: | |
1144 | els_data.fp = fp; | |
1145 | lport->tt.seq_els_rsp_send(sp, ELS_REC, &els_data); | |
1146 | break; | |
1147 | default: | |
83fe6a93 | 1148 | fc_frame_free(fp); /* can't happen */ |
131203a1 | 1149 | break; |
42e9a92f RL |
1150 | } |
1151 | ||
1152 | mutex_unlock(&rdata->rp_mutex); | |
83fe6a93 JE |
1153 | return; |
1154 | ||
1155 | reject: | |
1156 | lport->tt.seq_els_rsp_send(sp, ELS_LS_RJT, &els_data); | |
1157 | fc_frame_free(fp); | |
1158 | } | |
1159 | ||
1160 | /** | |
1161 | * fc_rport_recv_req() - Handle a received ELS request from a rport | |
1162 | * @sp: current sequence in the PLOGI exchange | |
1163 | * @fp: response frame | |
1164 | * @lport: Fibre Channel local port | |
1165 | * | |
1166 | * Locking Note: Called with the lport lock held. | |
1167 | */ | |
1168 | void fc_rport_recv_req(struct fc_seq *sp, struct fc_frame *fp, | |
1169 | struct fc_lport *lport) | |
1170 | { | |
1171 | struct fc_seq_els_data els_data; | |
1172 | ||
1173 | /* | |
1174 | * Handle PLOGI and LOGO requests separately, since they | |
1175 | * don't require prior login. | |
1176 | * Check for unsupported opcodes first and reject them. | |
1177 | * For some ops, it would be incorrect to reject with "PLOGI required". | |
1178 | */ | |
1179 | switch (fc_frame_payload_op(fp)) { | |
1180 | case ELS_PLOGI: | |
1181 | fc_rport_recv_plogi_req(lport, sp, fp); | |
1182 | break; | |
1183 | case ELS_LOGO: | |
1184 | fc_rport_recv_logo_req(lport, sp, fp); | |
1185 | break; | |
1186 | case ELS_PRLI: | |
1187 | case ELS_PRLO: | |
8abbe3a4 | 1188 | case ELS_ADISC: |
83fe6a93 JE |
1189 | case ELS_RRQ: |
1190 | case ELS_REC: | |
1191 | fc_rport_recv_els_req(lport, sp, fp); | |
1192 | break; | |
1193 | default: | |
1194 | fc_frame_free(fp); | |
1195 | els_data.fp = NULL; | |
1196 | els_data.reason = ELS_RJT_UNSUP; | |
1197 | els_data.explan = ELS_EXPL_NONE; | |
1198 | lport->tt.seq_els_rsp_send(sp, ELS_LS_RJT, &els_data); | |
1199 | break; | |
1200 | } | |
42e9a92f RL |
1201 | } |
1202 | ||
1203 | /** | |
34f42a07 | 1204 | * fc_rport_recv_plogi_req() - Handle incoming Port Login (PLOGI) request |
3ac6f98f | 1205 | * @lport: local port |
42e9a92f RL |
1206 | * @sp: current sequence in the PLOGI exchange |
1207 | * @fp: PLOGI request frame | |
1208 | * | |
3ac6f98f | 1209 | * Locking Note: The rport lock is held before calling this function. |
42e9a92f | 1210 | */ |
3ac6f98f | 1211 | static void fc_rport_recv_plogi_req(struct fc_lport *lport, |
42e9a92f RL |
1212 | struct fc_seq *sp, struct fc_frame *rx_fp) |
1213 | { | |
3ac6f98f JE |
1214 | struct fc_disc *disc; |
1215 | struct fc_rport_priv *rdata; | |
42e9a92f RL |
1216 | struct fc_frame *fp = rx_fp; |
1217 | struct fc_exch *ep; | |
1218 | struct fc_frame_header *fh; | |
1219 | struct fc_els_flogi *pl; | |
1220 | struct fc_seq_els_data rjt_data; | |
3ac6f98f | 1221 | u32 sid, f_ctl; |
42e9a92f | 1222 | |
3ac6f98f | 1223 | rjt_data.fp = NULL; |
42e9a92f | 1224 | fh = fc_frame_header_get(fp); |
3ac6f98f | 1225 | sid = ntoh24(fh->fh_s_id); |
42e9a92f | 1226 | |
3ac6f98f | 1227 | FC_RPORT_ID_DBG(lport, sid, "Received PLOGI request\n"); |
42e9a92f | 1228 | |
42e9a92f RL |
1229 | pl = fc_frame_payload_get(fp, sizeof(*pl)); |
1230 | if (!pl) { | |
3ac6f98f JE |
1231 | FC_RPORT_ID_DBG(lport, sid, "Received PLOGI too short\n"); |
1232 | rjt_data.reason = ELS_RJT_PROT; | |
1233 | rjt_data.explan = ELS_EXPL_INV_LEN; | |
1234 | goto reject; | |
42e9a92f | 1235 | } |
3ac6f98f JE |
1236 | |
1237 | disc = &lport->disc; | |
1238 | mutex_lock(&disc->disc_mutex); | |
1239 | rdata = lport->tt.rport_create(lport, sid); | |
1240 | if (!rdata) { | |
1241 | mutex_unlock(&disc->disc_mutex); | |
1242 | rjt_data.reason = ELS_RJT_UNAB; | |
1243 | rjt_data.explan = ELS_EXPL_INSUF_RES; | |
1244 | goto reject; | |
1245 | } | |
1246 | ||
1247 | mutex_lock(&rdata->rp_mutex); | |
1248 | mutex_unlock(&disc->disc_mutex); | |
1249 | ||
1250 | rdata->ids.port_name = get_unaligned_be64(&pl->fl_wwpn); | |
1251 | rdata->ids.node_name = get_unaligned_be64(&pl->fl_wwnn); | |
42e9a92f RL |
1252 | |
1253 | /* | |
3ac6f98f | 1254 | * If the rport was just created, possibly due to the incoming PLOGI, |
42e9a92f RL |
1255 | * set the state appropriately and accept the PLOGI. |
1256 | * | |
1257 | * If we had also sent a PLOGI, and if the received PLOGI is from a | |
1258 | * higher WWPN, we accept it, otherwise an LS_RJT is sent with reason | |
1259 | * "command already in progress". | |
1260 | * | |
1261 | * XXX TBD: If the session was ready before, the PLOGI should result in | |
1262 | * all outstanding exchanges being reset. | |
1263 | */ | |
1264 | switch (rdata->rp_state) { | |
1265 | case RPORT_ST_INIT: | |
3ac6f98f | 1266 | FC_RPORT_DBG(rdata, "Received PLOGI in INIT state\n"); |
42e9a92f RL |
1267 | break; |
1268 | case RPORT_ST_PLOGI: | |
3ac6f98f JE |
1269 | FC_RPORT_DBG(rdata, "Received PLOGI in PLOGI state\n"); |
1270 | if (rdata->ids.port_name < lport->wwpn) { | |
1271 | mutex_unlock(&rdata->rp_mutex); | |
1272 | rjt_data.reason = ELS_RJT_INPROG; | |
1273 | rjt_data.explan = ELS_EXPL_NONE; | |
1274 | goto reject; | |
1275 | } | |
42e9a92f RL |
1276 | break; |
1277 | case RPORT_ST_PRLI: | |
b4a9c7ed | 1278 | case RPORT_ST_RTV: |
42e9a92f | 1279 | case RPORT_ST_READY: |
370c3bd0 JE |
1280 | case RPORT_ST_ADISC: |
1281 | FC_RPORT_DBG(rdata, "Received PLOGI in logged-in state %d " | |
1282 | "- ignored for now\n", rdata->rp_state); | |
1283 | /* XXX TBD - should reset */ | |
42e9a92f | 1284 | break; |
14194054 | 1285 | case RPORT_ST_DELETE: |
b4a9c7ed JE |
1286 | case RPORT_ST_LOGO: |
1287 | case RPORT_ST_RESTART: | |
1288 | FC_RPORT_DBG(rdata, "Received PLOGI in state %s - send busy\n", | |
1289 | fc_rport_state(rdata)); | |
1290 | mutex_unlock(&rdata->rp_mutex); | |
1291 | rjt_data.reason = ELS_RJT_BUSY; | |
1292 | rjt_data.explan = ELS_EXPL_NONE; | |
1293 | goto reject; | |
42e9a92f RL |
1294 | } |
1295 | ||
3ac6f98f JE |
1296 | /* |
1297 | * Get session payload size from incoming PLOGI. | |
1298 | */ | |
1299 | rdata->maxframe_size = fc_plogi_get_maxframe(pl, lport->mfs); | |
1300 | fc_frame_free(rx_fp); | |
1301 | ||
1302 | /* | |
1303 | * Send LS_ACC. If this fails, the originator should retry. | |
1304 | */ | |
1305 | sp = lport->tt.seq_start_next(sp); | |
1306 | if (!sp) | |
1307 | goto out; | |
1308 | fp = fc_frame_alloc(lport, sizeof(*pl)); | |
1309 | if (!fp) | |
1310 | goto out; | |
1311 | ||
1312 | fc_plogi_fill(lport, fp, ELS_LS_ACC); | |
1313 | f_ctl = FC_FC_EX_CTX | FC_FC_LAST_SEQ | FC_FC_END_SEQ | FC_FC_SEQ_INIT; | |
1314 | ep = fc_seq_exch(sp); | |
1315 | fc_fill_fc_hdr(fp, FC_RCTL_ELS_REP, ep->did, ep->sid, | |
1316 | FC_TYPE_ELS, f_ctl, 0); | |
1317 | lport->tt.seq_send(lport, sp, fp); | |
1318 | fc_rport_enter_prli(rdata); | |
1319 | out: | |
1320 | mutex_unlock(&rdata->rp_mutex); | |
1321 | return; | |
1322 | ||
1323 | reject: | |
1324 | lport->tt.seq_els_rsp_send(sp, ELS_LS_RJT, &rjt_data); | |
1325 | fc_frame_free(fp); | |
42e9a92f RL |
1326 | } |
1327 | ||
1328 | /** | |
34f42a07 | 1329 | * fc_rport_recv_prli_req() - Handle incoming Process Login (PRLI) request |
9fb9d328 | 1330 | * @rdata: private remote port data |
42e9a92f RL |
1331 | * @sp: current sequence in the PRLI exchange |
1332 | * @fp: PRLI request frame | |
1333 | * | |
1334 | * Locking Note: The rport lock is exected to be held before calling | |
1335 | * this function. | |
1336 | */ | |
9fb9d328 | 1337 | static void fc_rport_recv_prli_req(struct fc_rport_priv *rdata, |
42e9a92f RL |
1338 | struct fc_seq *sp, struct fc_frame *rx_fp) |
1339 | { | |
42e9a92f RL |
1340 | struct fc_lport *lport = rdata->local_port; |
1341 | struct fc_exch *ep; | |
1342 | struct fc_frame *fp; | |
1343 | struct fc_frame_header *fh; | |
1344 | struct { | |
1345 | struct fc_els_prli prli; | |
1346 | struct fc_els_spp spp; | |
1347 | } *pp; | |
1348 | struct fc_els_spp *rspp; /* request service param page */ | |
1349 | struct fc_els_spp *spp; /* response spp */ | |
1350 | unsigned int len; | |
1351 | unsigned int plen; | |
1352 | enum fc_els_rjt_reason reason = ELS_RJT_UNAB; | |
1353 | enum fc_els_rjt_explan explan = ELS_EXPL_NONE; | |
1354 | enum fc_els_spp_resp resp; | |
1355 | struct fc_seq_els_data rjt_data; | |
1356 | u32 f_ctl; | |
1357 | u32 fcp_parm; | |
1358 | u32 roles = FC_RPORT_ROLE_UNKNOWN; | |
1359 | rjt_data.fp = NULL; | |
1360 | ||
1361 | fh = fc_frame_header_get(rx_fp); | |
1362 | ||
9fb9d328 JE |
1363 | FC_RPORT_DBG(rdata, "Received PRLI request while in state %s\n", |
1364 | fc_rport_state(rdata)); | |
42e9a92f RL |
1365 | |
1366 | switch (rdata->rp_state) { | |
1367 | case RPORT_ST_PRLI: | |
3ac6f98f | 1368 | case RPORT_ST_RTV: |
42e9a92f | 1369 | case RPORT_ST_READY: |
370c3bd0 | 1370 | case RPORT_ST_ADISC: |
42e9a92f RL |
1371 | reason = ELS_RJT_NONE; |
1372 | break; | |
1373 | default: | |
b4c6f546 AJ |
1374 | fc_frame_free(rx_fp); |
1375 | return; | |
42e9a92f RL |
1376 | break; |
1377 | } | |
1378 | len = fr_len(rx_fp) - sizeof(*fh); | |
1379 | pp = fc_frame_payload_get(rx_fp, sizeof(*pp)); | |
1380 | if (pp == NULL) { | |
1381 | reason = ELS_RJT_PROT; | |
1382 | explan = ELS_EXPL_INV_LEN; | |
1383 | } else { | |
1384 | plen = ntohs(pp->prli.prli_len); | |
1385 | if ((plen % 4) != 0 || plen > len) { | |
1386 | reason = ELS_RJT_PROT; | |
1387 | explan = ELS_EXPL_INV_LEN; | |
1388 | } else if (plen < len) { | |
1389 | len = plen; | |
1390 | } | |
1391 | plen = pp->prli.prli_spp_len; | |
1392 | if ((plen % 4) != 0 || plen < sizeof(*spp) || | |
1393 | plen > len || len < sizeof(*pp)) { | |
1394 | reason = ELS_RJT_PROT; | |
1395 | explan = ELS_EXPL_INV_LEN; | |
1396 | } | |
1397 | rspp = &pp->spp; | |
1398 | } | |
1399 | if (reason != ELS_RJT_NONE || | |
1400 | (fp = fc_frame_alloc(lport, len)) == NULL) { | |
1401 | rjt_data.reason = reason; | |
1402 | rjt_data.explan = explan; | |
1403 | lport->tt.seq_els_rsp_send(sp, ELS_LS_RJT, &rjt_data); | |
1404 | } else { | |
1405 | sp = lport->tt.seq_start_next(sp); | |
1406 | WARN_ON(!sp); | |
1407 | pp = fc_frame_payload_get(fp, len); | |
1408 | WARN_ON(!pp); | |
1409 | memset(pp, 0, len); | |
1410 | pp->prli.prli_cmd = ELS_LS_ACC; | |
1411 | pp->prli.prli_spp_len = plen; | |
1412 | pp->prli.prli_len = htons(len); | |
1413 | len -= sizeof(struct fc_els_prli); | |
1414 | ||
6bd054cb RL |
1415 | /* reinitialize remote port roles */ |
1416 | rdata->ids.roles = FC_RPORT_ROLE_UNKNOWN; | |
1417 | ||
42e9a92f RL |
1418 | /* |
1419 | * Go through all the service parameter pages and build | |
1420 | * response. If plen indicates longer SPP than standard, | |
1421 | * use that. The entire response has been pre-cleared above. | |
1422 | */ | |
1423 | spp = &pp->spp; | |
1424 | while (len >= plen) { | |
1425 | spp->spp_type = rspp->spp_type; | |
1426 | spp->spp_type_ext = rspp->spp_type_ext; | |
1427 | spp->spp_flags = rspp->spp_flags & FC_SPP_EST_IMG_PAIR; | |
1428 | resp = FC_SPP_RESP_ACK; | |
1429 | if (rspp->spp_flags & FC_SPP_RPA_VAL) | |
1430 | resp = FC_SPP_RESP_NO_PA; | |
1431 | switch (rspp->spp_type) { | |
1432 | case 0: /* common to all FC-4 types */ | |
1433 | break; | |
1434 | case FC_TYPE_FCP: | |
1435 | fcp_parm = ntohl(rspp->spp_params); | |
85b5893c | 1436 | if (fcp_parm & FCP_SPPF_RETRY) |
42e9a92f | 1437 | rdata->flags |= FC_RP_FLAGS_RETRY; |
f211fa51 | 1438 | rdata->supported_classes = FC_COS_CLASS3; |
42e9a92f RL |
1439 | if (fcp_parm & FCP_SPPF_INIT_FCN) |
1440 | roles |= FC_RPORT_ROLE_FCP_INITIATOR; | |
1441 | if (fcp_parm & FCP_SPPF_TARG_FCN) | |
1442 | roles |= FC_RPORT_ROLE_FCP_TARGET; | |
f211fa51 | 1443 | rdata->ids.roles = roles; |
42e9a92f RL |
1444 | |
1445 | spp->spp_params = | |
1446 | htonl(lport->service_params); | |
1447 | break; | |
1448 | default: | |
1449 | resp = FC_SPP_RESP_INVL; | |
1450 | break; | |
1451 | } | |
1452 | spp->spp_flags |= resp; | |
1453 | len -= plen; | |
1454 | rspp = (struct fc_els_spp *)((char *)rspp + plen); | |
1455 | spp = (struct fc_els_spp *)((char *)spp + plen); | |
1456 | } | |
1457 | ||
1458 | /* | |
1459 | * Send LS_ACC. If this fails, the originator should retry. | |
1460 | */ | |
1461 | f_ctl = FC_FC_EX_CTX | FC_FC_LAST_SEQ; | |
1462 | f_ctl |= FC_FC_END_SEQ | FC_FC_SEQ_INIT; | |
1463 | ep = fc_seq_exch(sp); | |
1464 | fc_fill_fc_hdr(fp, FC_RCTL_ELS_REP, ep->did, ep->sid, | |
1465 | FC_TYPE_ELS, f_ctl, 0); | |
1466 | lport->tt.seq_send(lport, sp, fp); | |
1467 | ||
1468 | /* | |
1469 | * Get lock and re-check state. | |
1470 | */ | |
1471 | switch (rdata->rp_state) { | |
1472 | case RPORT_ST_PRLI: | |
9fb9d328 | 1473 | fc_rport_enter_ready(rdata); |
42e9a92f RL |
1474 | break; |
1475 | case RPORT_ST_READY: | |
370c3bd0 | 1476 | case RPORT_ST_ADISC: |
42e9a92f RL |
1477 | break; |
1478 | default: | |
1479 | break; | |
1480 | } | |
1481 | } | |
1482 | fc_frame_free(rx_fp); | |
1483 | } | |
1484 | ||
1485 | /** | |
34f42a07 | 1486 | * fc_rport_recv_prlo_req() - Handle incoming Process Logout (PRLO) request |
9fb9d328 | 1487 | * @rdata: private remote port data |
42e9a92f RL |
1488 | * @sp: current sequence in the PRLO exchange |
1489 | * @fp: PRLO request frame | |
1490 | * | |
1491 | * Locking Note: The rport lock is exected to be held before calling | |
1492 | * this function. | |
1493 | */ | |
9fb9d328 JE |
1494 | static void fc_rport_recv_prlo_req(struct fc_rport_priv *rdata, |
1495 | struct fc_seq *sp, | |
42e9a92f RL |
1496 | struct fc_frame *fp) |
1497 | { | |
42e9a92f RL |
1498 | struct fc_lport *lport = rdata->local_port; |
1499 | ||
1500 | struct fc_frame_header *fh; | |
1501 | struct fc_seq_els_data rjt_data; | |
1502 | ||
1503 | fh = fc_frame_header_get(fp); | |
1504 | ||
9fb9d328 JE |
1505 | FC_RPORT_DBG(rdata, "Received PRLO request while in state %s\n", |
1506 | fc_rport_state(rdata)); | |
42e9a92f RL |
1507 | |
1508 | rjt_data.fp = NULL; | |
1509 | rjt_data.reason = ELS_RJT_UNAB; | |
1510 | rjt_data.explan = ELS_EXPL_NONE; | |
1511 | lport->tt.seq_els_rsp_send(sp, ELS_LS_RJT, &rjt_data); | |
1512 | fc_frame_free(fp); | |
1513 | } | |
1514 | ||
1515 | /** | |
34f42a07 | 1516 | * fc_rport_recv_logo_req() - Handle incoming Logout (LOGO) request |
83fe6a93 | 1517 | * @lport: local port. |
42e9a92f RL |
1518 | * @sp: current sequence in the LOGO exchange |
1519 | * @fp: LOGO request frame | |
1520 | * | |
1521 | * Locking Note: The rport lock is exected to be held before calling | |
1522 | * this function. | |
1523 | */ | |
83fe6a93 | 1524 | static void fc_rport_recv_logo_req(struct fc_lport *lport, |
9fb9d328 | 1525 | struct fc_seq *sp, |
42e9a92f RL |
1526 | struct fc_frame *fp) |
1527 | { | |
1528 | struct fc_frame_header *fh; | |
83fe6a93 JE |
1529 | struct fc_rport_priv *rdata; |
1530 | u32 sid; | |
42e9a92f | 1531 | |
feab4ae7 JE |
1532 | lport->tt.seq_els_rsp_send(sp, ELS_LS_ACC, NULL); |
1533 | ||
42e9a92f | 1534 | fh = fc_frame_header_get(fp); |
83fe6a93 | 1535 | sid = ntoh24(fh->fh_s_id); |
42e9a92f | 1536 | |
83fe6a93 JE |
1537 | mutex_lock(&lport->disc.disc_mutex); |
1538 | rdata = lport->tt.rport_lookup(lport, sid); | |
1539 | if (rdata) { | |
1540 | mutex_lock(&rdata->rp_mutex); | |
1541 | FC_RPORT_DBG(rdata, "Received LOGO request while in state %s\n", | |
1542 | fc_rport_state(rdata)); | |
feab4ae7 | 1543 | |
b4a9c7ed JE |
1544 | fc_rport_enter_delete(rdata, RPORT_EV_LOGO); |
1545 | ||
feab4ae7 | 1546 | /* |
b4a9c7ed JE |
1547 | * If the remote port was created due to discovery, set state |
1548 | * to log back in. It may have seen a stale RSCN about us. | |
feab4ae7 | 1549 | */ |
b4a9c7ed JE |
1550 | if (rdata->disc_id) |
1551 | fc_rport_state_enter(rdata, RPORT_ST_RESTART); | |
83fe6a93 JE |
1552 | mutex_unlock(&rdata->rp_mutex); |
1553 | } else | |
1554 | FC_RPORT_ID_DBG(lport, sid, | |
1555 | "Received LOGO from non-logged-in port\n"); | |
1556 | mutex_unlock(&lport->disc.disc_mutex); | |
42e9a92f RL |
1557 | fc_frame_free(fp); |
1558 | } | |
1559 | ||
1560 | static void fc_rport_flush_queue(void) | |
1561 | { | |
1562 | flush_workqueue(rport_event_queue); | |
1563 | } | |
1564 | ||
42e9a92f RL |
1565 | int fc_rport_init(struct fc_lport *lport) |
1566 | { | |
8025b5db JE |
1567 | if (!lport->tt.rport_lookup) |
1568 | lport->tt.rport_lookup = fc_rport_lookup; | |
1569 | ||
5101ff99 | 1570 | if (!lport->tt.rport_create) |
9e9d0452 | 1571 | lport->tt.rport_create = fc_rport_create; |
5101ff99 | 1572 | |
42e9a92f RL |
1573 | if (!lport->tt.rport_login) |
1574 | lport->tt.rport_login = fc_rport_login; | |
1575 | ||
1576 | if (!lport->tt.rport_logoff) | |
1577 | lport->tt.rport_logoff = fc_rport_logoff; | |
1578 | ||
1579 | if (!lport->tt.rport_recv_req) | |
1580 | lport->tt.rport_recv_req = fc_rport_recv_req; | |
1581 | ||
1582 | if (!lport->tt.rport_flush_queue) | |
1583 | lport->tt.rport_flush_queue = fc_rport_flush_queue; | |
1584 | ||
f211fa51 JE |
1585 | if (!lport->tt.rport_destroy) |
1586 | lport->tt.rport_destroy = fc_rport_destroy; | |
1587 | ||
42e9a92f RL |
1588 | return 0; |
1589 | } | |
1590 | EXPORT_SYMBOL(fc_rport_init); | |
1591 | ||
b0d428ad | 1592 | int fc_setup_rport(void) |
42e9a92f RL |
1593 | { |
1594 | rport_event_queue = create_singlethread_workqueue("fc_rport_eq"); | |
1595 | if (!rport_event_queue) | |
1596 | return -ENOMEM; | |
1597 | return 0; | |
1598 | } | |
42e9a92f | 1599 | |
b0d428ad | 1600 | void fc_destroy_rport(void) |
42e9a92f RL |
1601 | { |
1602 | destroy_workqueue(rport_event_queue); | |
1603 | } | |
42e9a92f RL |
1604 | |
1605 | void fc_rport_terminate_io(struct fc_rport *rport) | |
1606 | { | |
ab28f1fd JE |
1607 | struct fc_rport_libfc_priv *rp = rport->dd_data; |
1608 | struct fc_lport *lport = rp->local_port; | |
42e9a92f | 1609 | |
1f6ff364 AJ |
1610 | lport->tt.exch_mgr_reset(lport, 0, rport->port_id); |
1611 | lport->tt.exch_mgr_reset(lport, rport->port_id, 0); | |
42e9a92f RL |
1612 | } |
1613 | EXPORT_SYMBOL(fc_rport_terminate_io); |