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