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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> | |
5a0e3ad6 | 50 | #include <linux/slab.h> |
42e9a92f RL |
51 | #include <linux/rcupdate.h> |
52 | #include <linux/timer.h> | |
53 | #include <linux/workqueue.h> | |
54 | #include <asm/unaligned.h> | |
55 | ||
56 | #include <scsi/libfc.h> | |
57 | #include <scsi/fc_encode.h> | |
58 | ||
8866a5d9 RL |
59 | #include "fc_libfc.h" |
60 | ||
42e9a92f RL |
61 | struct workqueue_struct *rport_event_queue; |
62 | ||
9fb9d328 JE |
63 | static void fc_rport_enter_plogi(struct fc_rport_priv *); |
64 | static void fc_rport_enter_prli(struct fc_rport_priv *); | |
65 | static void fc_rport_enter_rtv(struct fc_rport_priv *); | |
66 | static void fc_rport_enter_ready(struct fc_rport_priv *); | |
67 | static void fc_rport_enter_logo(struct fc_rport_priv *); | |
370c3bd0 | 68 | static void fc_rport_enter_adisc(struct fc_rport_priv *); |
42e9a92f | 69 | |
3ac6f98f | 70 | static void fc_rport_recv_plogi_req(struct fc_lport *, |
42e9a92f | 71 | struct fc_seq *, struct fc_frame *); |
9fb9d328 | 72 | static void fc_rport_recv_prli_req(struct fc_rport_priv *, |
42e9a92f | 73 | struct fc_seq *, struct fc_frame *); |
9fb9d328 | 74 | static void fc_rport_recv_prlo_req(struct fc_rport_priv *, |
42e9a92f | 75 | struct fc_seq *, struct fc_frame *); |
83fe6a93 | 76 | static void fc_rport_recv_logo_req(struct fc_lport *, |
42e9a92f RL |
77 | struct fc_seq *, struct fc_frame *); |
78 | static void fc_rport_timeout(struct work_struct *); | |
9fb9d328 JE |
79 | static void fc_rport_error(struct fc_rport_priv *, struct fc_frame *); |
80 | static void fc_rport_error_retry(struct fc_rport_priv *, struct fc_frame *); | |
42e9a92f RL |
81 | static void fc_rport_work(struct work_struct *); |
82 | ||
83 | static const char *fc_rport_state_names[] = { | |
42e9a92f RL |
84 | [RPORT_ST_INIT] = "Init", |
85 | [RPORT_ST_PLOGI] = "PLOGI", | |
86 | [RPORT_ST_PRLI] = "PRLI", | |
87 | [RPORT_ST_RTV] = "RTV", | |
88 | [RPORT_ST_READY] = "Ready", | |
89 | [RPORT_ST_LOGO] = "LOGO", | |
370c3bd0 | 90 | [RPORT_ST_ADISC] = "ADISC", |
14194054 | 91 | [RPORT_ST_DELETE] = "Delete", |
b4a9c7ed | 92 | [RPORT_ST_RESTART] = "Restart", |
42e9a92f RL |
93 | }; |
94 | ||
8025b5db | 95 | /** |
3a3b42bf RL |
96 | * fc_rport_lookup() - Lookup a remote port by port_id |
97 | * @lport: The local port to lookup the remote port on | |
98 | * @port_id: The remote port ID to look up | |
8025b5db JE |
99 | */ |
100 | static struct fc_rport_priv *fc_rport_lookup(const struct fc_lport *lport, | |
101 | u32 port_id) | |
102 | { | |
103 | struct fc_rport_priv *rdata; | |
104 | ||
105 | list_for_each_entry(rdata, &lport->disc.rports, peers) | |
b4a9c7ed | 106 | if (rdata->ids.port_id == port_id) |
8025b5db JE |
107 | return rdata; |
108 | return NULL; | |
109 | } | |
110 | ||
9e9d0452 | 111 | /** |
9737e6a7 | 112 | * fc_rport_create() - Create a new remote port |
3a3b42bf RL |
113 | * @lport: The local port this remote port will be associated with |
114 | * @ids: The identifiers for the new remote port | |
115 | * | |
116 | * The remote port will start in the INIT state. | |
9e9d0452 | 117 | * |
48f00902 | 118 | * Locking note: must be called with the disc_mutex held. |
9e9d0452 JE |
119 | */ |
120 | static struct fc_rport_priv *fc_rport_create(struct fc_lport *lport, | |
9737e6a7 | 121 | u32 port_id) |
42e9a92f | 122 | { |
ab28f1fd | 123 | struct fc_rport_priv *rdata; |
42e9a92f | 124 | |
9737e6a7 | 125 | rdata = lport->tt.rport_lookup(lport, port_id); |
19f97e3c JE |
126 | if (rdata) |
127 | return rdata; | |
128 | ||
9e9d0452 JE |
129 | rdata = kzalloc(sizeof(*rdata), GFP_KERNEL); |
130 | if (!rdata) | |
42e9a92f RL |
131 | return NULL; |
132 | ||
9737e6a7 RL |
133 | rdata->ids.node_name = -1; |
134 | rdata->ids.port_name = -1; | |
135 | rdata->ids.port_id = port_id; | |
136 | rdata->ids.roles = FC_RPORT_ROLE_UNKNOWN; | |
137 | ||
f211fa51 | 138 | kref_init(&rdata->kref); |
42e9a92f | 139 | mutex_init(&rdata->rp_mutex); |
795d86f5 | 140 | rdata->local_port = lport; |
42e9a92f RL |
141 | rdata->rp_state = RPORT_ST_INIT; |
142 | rdata->event = RPORT_EV_NONE; | |
143 | rdata->flags = FC_RP_FLAGS_REC_SUPPORTED; | |
795d86f5 JE |
144 | rdata->e_d_tov = lport->e_d_tov; |
145 | rdata->r_a_tov = lport->r_a_tov; | |
f211fa51 | 146 | rdata->maxframe_size = FC_MIN_MAX_PAYLOAD; |
42e9a92f RL |
147 | INIT_DELAYED_WORK(&rdata->retry_work, fc_rport_timeout); |
148 | INIT_WORK(&rdata->event_work, fc_rport_work); | |
9737e6a7 | 149 | if (port_id != FC_FID_DIR_SERV) |
48f00902 | 150 | list_add(&rdata->peers, &lport->disc.rports); |
9fb9d328 | 151 | return rdata; |
42e9a92f RL |
152 | } |
153 | ||
f211fa51 | 154 | /** |
3a3b42bf RL |
155 | * fc_rport_destroy() - Free a remote port after last reference is released |
156 | * @kref: The remote port's kref | |
f211fa51 JE |
157 | */ |
158 | static void fc_rport_destroy(struct kref *kref) | |
159 | { | |
160 | struct fc_rport_priv *rdata; | |
f211fa51 JE |
161 | |
162 | rdata = container_of(kref, struct fc_rport_priv, kref); | |
9e9d0452 | 163 | kfree(rdata); |
f211fa51 JE |
164 | } |
165 | ||
42e9a92f | 166 | /** |
3a3b42bf RL |
167 | * fc_rport_state() - Return a string identifying the remote port's state |
168 | * @rdata: The remote port | |
42e9a92f | 169 | */ |
9fb9d328 | 170 | static const char *fc_rport_state(struct fc_rport_priv *rdata) |
42e9a92f RL |
171 | { |
172 | const char *cp; | |
42e9a92f RL |
173 | |
174 | cp = fc_rport_state_names[rdata->rp_state]; | |
175 | if (!cp) | |
176 | cp = "Unknown"; | |
177 | return cp; | |
178 | } | |
179 | ||
180 | /** | |
3a3b42bf RL |
181 | * fc_set_rport_loss_tmo() - Set the remote port loss timeout |
182 | * @rport: The remote port that gets a new timeout value | |
183 | * @timeout: The new timeout value (in seconds) | |
42e9a92f RL |
184 | */ |
185 | void fc_set_rport_loss_tmo(struct fc_rport *rport, u32 timeout) | |
186 | { | |
187 | if (timeout) | |
188 | rport->dev_loss_tmo = timeout + 5; | |
189 | else | |
190 | rport->dev_loss_tmo = 30; | |
191 | } | |
192 | EXPORT_SYMBOL(fc_set_rport_loss_tmo); | |
193 | ||
194 | /** | |
3a3b42bf RL |
195 | * fc_plogi_get_maxframe() - Get the maximum payload from the common service |
196 | * parameters in a FLOGI frame | |
197 | * @flp: The FLOGI payload | |
198 | * @maxval: The maximum frame size upper limit; this may be less than what | |
199 | * is in the service parameters | |
42e9a92f | 200 | */ |
b2ab99c9 RL |
201 | static unsigned int fc_plogi_get_maxframe(struct fc_els_flogi *flp, |
202 | unsigned int maxval) | |
42e9a92f RL |
203 | { |
204 | unsigned int mfs; | |
205 | ||
206 | /* | |
207 | * Get max payload from the common service parameters and the | |
208 | * class 3 receive data field size. | |
209 | */ | |
210 | mfs = ntohs(flp->fl_csp.sp_bb_data) & FC_SP_BB_DATA_MASK; | |
211 | if (mfs >= FC_SP_MIN_MAX_PAYLOAD && mfs < maxval) | |
212 | maxval = mfs; | |
213 | mfs = ntohs(flp->fl_cssp[3 - 1].cp_rdfs); | |
214 | if (mfs >= FC_SP_MIN_MAX_PAYLOAD && mfs < maxval) | |
215 | maxval = mfs; | |
216 | return maxval; | |
217 | } | |
218 | ||
219 | /** | |
3a3b42bf RL |
220 | * fc_rport_state_enter() - Change the state of a remote port |
221 | * @rdata: The remote port whose state should change | |
222 | * @new: The new state | |
42e9a92f RL |
223 | * |
224 | * Locking Note: Called with the rport lock held | |
225 | */ | |
9fb9d328 | 226 | static void fc_rport_state_enter(struct fc_rport_priv *rdata, |
42e9a92f RL |
227 | enum fc_rport_state new) |
228 | { | |
42e9a92f RL |
229 | if (rdata->rp_state != new) |
230 | rdata->retries = 0; | |
231 | rdata->rp_state = new; | |
232 | } | |
233 | ||
3a3b42bf RL |
234 | /** |
235 | * fc_rport_work() - Handler for remote port events in the rport_event_queue | |
236 | * @work: Handle to the remote port being dequeued | |
237 | */ | |
42e9a92f RL |
238 | static void fc_rport_work(struct work_struct *work) |
239 | { | |
571f824c | 240 | u32 port_id; |
ab28f1fd JE |
241 | struct fc_rport_priv *rdata = |
242 | container_of(work, struct fc_rport_priv, event_work); | |
3a3b42bf | 243 | struct fc_rport_libfc_priv *rpriv; |
42e9a92f | 244 | enum fc_rport_event event; |
42e9a92f RL |
245 | struct fc_lport *lport = rdata->local_port; |
246 | struct fc_rport_operations *rport_ops; | |
629f4427 | 247 | struct fc_rport_identifiers ids; |
f211fa51 | 248 | struct fc_rport *rport; |
b4a9c7ed | 249 | int restart = 0; |
42e9a92f RL |
250 | |
251 | mutex_lock(&rdata->rp_mutex); | |
252 | event = rdata->event; | |
253 | rport_ops = rdata->ops; | |
f211fa51 | 254 | rport = rdata->rport; |
42e9a92f | 255 | |
9e9d0452 JE |
256 | FC_RPORT_DBG(rdata, "work event %u\n", event); |
257 | ||
629f4427 | 258 | switch (event) { |
4c0f62b5 | 259 | case RPORT_EV_READY: |
f211fa51 | 260 | ids = rdata->ids; |
5f7ea3b7 | 261 | rdata->event = RPORT_EV_NONE; |
9e9d0452 | 262 | kref_get(&rdata->kref); |
42e9a92f RL |
263 | mutex_unlock(&rdata->rp_mutex); |
264 | ||
9e9d0452 JE |
265 | if (!rport) |
266 | rport = fc_remote_port_add(lport->host, 0, &ids); | |
267 | if (!rport) { | |
268 | FC_RPORT_DBG(rdata, "Failed to add the rport\n"); | |
269 | lport->tt.rport_logoff(rdata); | |
270 | kref_put(&rdata->kref, lport->tt.rport_destroy); | |
271 | return; | |
42e9a92f | 272 | } |
9e9d0452 JE |
273 | mutex_lock(&rdata->rp_mutex); |
274 | if (rdata->rport) | |
275 | FC_RPORT_DBG(rdata, "rport already allocated\n"); | |
276 | rdata->rport = rport; | |
277 | rport->maxframe_size = rdata->maxframe_size; | |
278 | rport->supported_classes = rdata->supported_classes; | |
279 | ||
3a3b42bf RL |
280 | rpriv = rport->dd_data; |
281 | rpriv->local_port = lport; | |
282 | rpriv->rp_state = rdata->rp_state; | |
283 | rpriv->flags = rdata->flags; | |
284 | rpriv->e_d_tov = rdata->e_d_tov; | |
285 | rpriv->r_a_tov = rdata->r_a_tov; | |
9e9d0452 JE |
286 | mutex_unlock(&rdata->rp_mutex); |
287 | ||
8345592b | 288 | if (rport_ops && rport_ops->event_callback) { |
9e9d0452 | 289 | FC_RPORT_DBG(rdata, "callback ev %d\n", event); |
9fb9d328 | 290 | rport_ops->event_callback(lport, rdata, event); |
9e9d0452 JE |
291 | } |
292 | kref_put(&rdata->kref, lport->tt.rport_destroy); | |
629f4427 JE |
293 | break; |
294 | ||
295 | case RPORT_EV_FAILED: | |
296 | case RPORT_EV_LOGO: | |
297 | case RPORT_EV_STOP: | |
9e9d0452 | 298 | port_id = rdata->ids.port_id; |
42e9a92f | 299 | mutex_unlock(&rdata->rp_mutex); |
9e9d0452 | 300 | |
48f00902 | 301 | if (port_id != FC_FID_DIR_SERV) { |
b4a9c7ed JE |
302 | /* |
303 | * We must drop rp_mutex before taking disc_mutex. | |
304 | * Re-evaluate state to allow for restart. | |
305 | * A transition to RESTART state must only happen | |
306 | * while disc_mutex is held and rdata is on the list. | |
307 | */ | |
48f00902 | 308 | mutex_lock(&lport->disc.disc_mutex); |
b4a9c7ed JE |
309 | mutex_lock(&rdata->rp_mutex); |
310 | if (rdata->rp_state == RPORT_ST_RESTART) | |
311 | restart = 1; | |
312 | else | |
313 | list_del(&rdata->peers); | |
5543c72e | 314 | rdata->event = RPORT_EV_NONE; |
b4a9c7ed | 315 | mutex_unlock(&rdata->rp_mutex); |
48f00902 JE |
316 | mutex_unlock(&lport->disc.disc_mutex); |
317 | } | |
318 | ||
8345592b | 319 | if (rport_ops && rport_ops->event_callback) { |
9e9d0452 | 320 | FC_RPORT_DBG(rdata, "callback ev %d\n", event); |
9fb9d328 | 321 | rport_ops->event_callback(lport, rdata, event); |
9e9d0452 | 322 | } |
201e5795 | 323 | cancel_delayed_work_sync(&rdata->retry_work); |
9e9d0452 JE |
324 | |
325 | /* | |
326 | * Reset any outstanding exchanges before freeing rport. | |
327 | */ | |
328 | lport->tt.exch_mgr_reset(lport, 0, port_id); | |
329 | lport->tt.exch_mgr_reset(lport, port_id, 0); | |
330 | ||
331 | if (rport) { | |
3a3b42bf RL |
332 | rpriv = rport->dd_data; |
333 | rpriv->rp_state = RPORT_ST_DELETE; | |
9e9d0452 JE |
334 | mutex_lock(&rdata->rp_mutex); |
335 | rdata->rport = NULL; | |
336 | mutex_unlock(&rdata->rp_mutex); | |
42e9a92f | 337 | fc_remote_port_delete(rport); |
571f824c | 338 | } |
b4a9c7ed JE |
339 | if (restart) { |
340 | mutex_lock(&rdata->rp_mutex); | |
341 | FC_RPORT_DBG(rdata, "work restart\n"); | |
342 | fc_rport_enter_plogi(rdata); | |
343 | mutex_unlock(&rdata->rp_mutex); | |
344 | } else | |
345 | kref_put(&rdata->kref, lport->tt.rport_destroy); | |
629f4427 JE |
346 | break; |
347 | ||
348 | default: | |
42e9a92f | 349 | mutex_unlock(&rdata->rp_mutex); |
629f4427 JE |
350 | break; |
351 | } | |
42e9a92f RL |
352 | } |
353 | ||
354 | /** | |
34f42a07 | 355 | * fc_rport_login() - Start the remote port login state machine |
3a3b42bf | 356 | * @rdata: The remote port to be logged in to |
42e9a92f RL |
357 | * |
358 | * Locking Note: Called without the rport lock held. This | |
359 | * function will hold the rport lock, call an _enter_* | |
360 | * function and then unlock the rport. | |
370c3bd0 JE |
361 | * |
362 | * This indicates the intent to be logged into the remote port. | |
363 | * If it appears we are already logged in, ADISC is used to verify | |
364 | * the setup. | |
42e9a92f | 365 | */ |
9fb9d328 | 366 | int fc_rport_login(struct fc_rport_priv *rdata) |
42e9a92f | 367 | { |
42e9a92f RL |
368 | mutex_lock(&rdata->rp_mutex); |
369 | ||
370c3bd0 JE |
370 | switch (rdata->rp_state) { |
371 | case RPORT_ST_READY: | |
372 | FC_RPORT_DBG(rdata, "ADISC port\n"); | |
373 | fc_rport_enter_adisc(rdata); | |
374 | break; | |
b4a9c7ed JE |
375 | case RPORT_ST_RESTART: |
376 | break; | |
377 | case RPORT_ST_DELETE: | |
378 | FC_RPORT_DBG(rdata, "Restart deleted port\n"); | |
379 | fc_rport_state_enter(rdata, RPORT_ST_RESTART); | |
380 | break; | |
370c3bd0 JE |
381 | default: |
382 | FC_RPORT_DBG(rdata, "Login to port\n"); | |
383 | fc_rport_enter_plogi(rdata); | |
384 | break; | |
385 | } | |
42e9a92f RL |
386 | mutex_unlock(&rdata->rp_mutex); |
387 | ||
388 | return 0; | |
389 | } | |
390 | ||
5f7ea3b7 | 391 | /** |
3a3b42bf RL |
392 | * fc_rport_enter_delete() - Schedule a remote port to be deleted |
393 | * @rdata: The remote port to be deleted | |
394 | * @event: The event to report as the reason for deletion | |
5f7ea3b7 JE |
395 | * |
396 | * Locking Note: Called with the rport lock held. | |
397 | * | |
398 | * Allow state change into DELETE only once. | |
399 | * | |
400 | * Call queue_work only if there's no event already pending. | |
401 | * Set the new event so that the old pending event will not occur. | |
402 | * Since we have the mutex, even if fc_rport_work() is already started, | |
403 | * it'll see the new event. | |
404 | */ | |
9fb9d328 | 405 | static void fc_rport_enter_delete(struct fc_rport_priv *rdata, |
5f7ea3b7 JE |
406 | enum fc_rport_event event) |
407 | { | |
5f7ea3b7 JE |
408 | if (rdata->rp_state == RPORT_ST_DELETE) |
409 | return; | |
410 | ||
9fb9d328 | 411 | FC_RPORT_DBG(rdata, "Delete port\n"); |
5f7ea3b7 | 412 | |
9fb9d328 | 413 | fc_rport_state_enter(rdata, RPORT_ST_DELETE); |
5f7ea3b7 JE |
414 | |
415 | if (rdata->event == RPORT_EV_NONE) | |
416 | queue_work(rport_event_queue, &rdata->event_work); | |
417 | rdata->event = event; | |
418 | } | |
419 | ||
42e9a92f | 420 | /** |
3a3b42bf RL |
421 | * fc_rport_logoff() - Logoff and remove a remote port |
422 | * @rdata: The remote port to be logged off of | |
42e9a92f RL |
423 | * |
424 | * Locking Note: Called without the rport lock held. This | |
425 | * function will hold the rport lock, call an _enter_* | |
426 | * function and then unlock the rport. | |
427 | */ | |
9fb9d328 | 428 | int fc_rport_logoff(struct fc_rport_priv *rdata) |
42e9a92f | 429 | { |
42e9a92f RL |
430 | mutex_lock(&rdata->rp_mutex); |
431 | ||
9fb9d328 | 432 | FC_RPORT_DBG(rdata, "Remove port\n"); |
42e9a92f | 433 | |
14194054 | 434 | if (rdata->rp_state == RPORT_ST_DELETE) { |
9fb9d328 | 435 | FC_RPORT_DBG(rdata, "Port in Delete state, not removing\n"); |
b4c6f546 AJ |
436 | goto out; |
437 | } | |
438 | ||
b4a9c7ed JE |
439 | if (rdata->rp_state == RPORT_ST_RESTART) |
440 | FC_RPORT_DBG(rdata, "Port in Restart state, deleting\n"); | |
441 | else | |
442 | fc_rport_enter_logo(rdata); | |
42e9a92f RL |
443 | |
444 | /* | |
14194054 | 445 | * Change the state to Delete so that we discard |
42e9a92f RL |
446 | * the response. |
447 | */ | |
9fb9d328 | 448 | fc_rport_enter_delete(rdata, RPORT_EV_STOP); |
b4c6f546 | 449 | out: |
b4a9c7ed | 450 | mutex_unlock(&rdata->rp_mutex); |
42e9a92f RL |
451 | return 0; |
452 | } | |
453 | ||
454 | /** | |
3a3b42bf RL |
455 | * fc_rport_enter_ready() - Transition to the RPORT_ST_READY state |
456 | * @rdata: The remote port that is ready | |
42e9a92f RL |
457 | * |
458 | * Locking Note: The rport lock is expected to be held before calling | |
459 | * this routine. | |
460 | */ | |
9fb9d328 | 461 | static void fc_rport_enter_ready(struct fc_rport_priv *rdata) |
42e9a92f | 462 | { |
9fb9d328 | 463 | fc_rport_state_enter(rdata, RPORT_ST_READY); |
42e9a92f | 464 | |
9fb9d328 | 465 | FC_RPORT_DBG(rdata, "Port is Ready\n"); |
42e9a92f | 466 | |
5f7ea3b7 JE |
467 | if (rdata->event == RPORT_EV_NONE) |
468 | queue_work(rport_event_queue, &rdata->event_work); | |
4c0f62b5 | 469 | rdata->event = RPORT_EV_READY; |
42e9a92f RL |
470 | } |
471 | ||
472 | /** | |
3a3b42bf RL |
473 | * fc_rport_timeout() - Handler for the retry_work timer |
474 | * @work: Handle to the remote port that has timed out | |
42e9a92f RL |
475 | * |
476 | * Locking Note: Called without the rport lock held. This | |
477 | * function will hold the rport lock, call an _enter_* | |
478 | * function and then unlock the rport. | |
479 | */ | |
480 | static void fc_rport_timeout(struct work_struct *work) | |
481 | { | |
ab28f1fd JE |
482 | struct fc_rport_priv *rdata = |
483 | container_of(work, struct fc_rport_priv, retry_work.work); | |
42e9a92f RL |
484 | |
485 | mutex_lock(&rdata->rp_mutex); | |
486 | ||
487 | switch (rdata->rp_state) { | |
488 | case RPORT_ST_PLOGI: | |
9fb9d328 | 489 | fc_rport_enter_plogi(rdata); |
42e9a92f RL |
490 | break; |
491 | case RPORT_ST_PRLI: | |
9fb9d328 | 492 | fc_rport_enter_prli(rdata); |
42e9a92f RL |
493 | break; |
494 | case RPORT_ST_RTV: | |
9fb9d328 | 495 | fc_rport_enter_rtv(rdata); |
42e9a92f RL |
496 | break; |
497 | case RPORT_ST_LOGO: | |
9fb9d328 | 498 | fc_rport_enter_logo(rdata); |
42e9a92f | 499 | break; |
370c3bd0 JE |
500 | case RPORT_ST_ADISC: |
501 | fc_rport_enter_adisc(rdata); | |
502 | break; | |
42e9a92f RL |
503 | case RPORT_ST_READY: |
504 | case RPORT_ST_INIT: | |
14194054 | 505 | case RPORT_ST_DELETE: |
b4a9c7ed | 506 | case RPORT_ST_RESTART: |
42e9a92f RL |
507 | break; |
508 | } | |
509 | ||
510 | mutex_unlock(&rdata->rp_mutex); | |
42e9a92f RL |
511 | } |
512 | ||
513 | /** | |
34f42a07 | 514 | * fc_rport_error() - Error handler, called once retries have been exhausted |
3a3b42bf RL |
515 | * @rdata: The remote port the error is happened on |
516 | * @fp: The error code encapsulated in a frame pointer | |
42e9a92f | 517 | * |
42e9a92f RL |
518 | * Locking Note: The rport lock is expected to be held before |
519 | * calling this routine | |
520 | */ | |
9fb9d328 | 521 | static void fc_rport_error(struct fc_rport_priv *rdata, struct fc_frame *fp) |
42e9a92f | 522 | { |
9fb9d328 | 523 | FC_RPORT_DBG(rdata, "Error %ld in state %s, retries %d\n", |
cdbe6dfe JE |
524 | IS_ERR(fp) ? -PTR_ERR(fp) : 0, |
525 | fc_rport_state(rdata), rdata->retries); | |
42e9a92f | 526 | |
6755db1c CL |
527 | switch (rdata->rp_state) { |
528 | case RPORT_ST_PLOGI: | |
6755db1c | 529 | case RPORT_ST_LOGO: |
9fb9d328 | 530 | fc_rport_enter_delete(rdata, RPORT_EV_FAILED); |
6755db1c CL |
531 | break; |
532 | case RPORT_ST_RTV: | |
9fb9d328 | 533 | fc_rport_enter_ready(rdata); |
6755db1c | 534 | break; |
370c3bd0 JE |
535 | case RPORT_ST_PRLI: |
536 | case RPORT_ST_ADISC: | |
537 | fc_rport_enter_logo(rdata); | |
538 | break; | |
14194054 | 539 | case RPORT_ST_DELETE: |
b4a9c7ed | 540 | case RPORT_ST_RESTART: |
6755db1c CL |
541 | case RPORT_ST_READY: |
542 | case RPORT_ST_INIT: | |
543 | break; | |
42e9a92f RL |
544 | } |
545 | } | |
546 | ||
6755db1c | 547 | /** |
3a3b42bf RL |
548 | * fc_rport_error_retry() - Handler for remote port state retries |
549 | * @rdata: The remote port whose state is to be retried | |
550 | * @fp: The error code encapsulated in a frame pointer | |
6755db1c CL |
551 | * |
552 | * If the error was an exchange timeout retry immediately, | |
553 | * otherwise wait for E_D_TOV. | |
554 | * | |
555 | * Locking Note: The rport lock is expected to be held before | |
556 | * calling this routine | |
557 | */ | |
9fb9d328 JE |
558 | static void fc_rport_error_retry(struct fc_rport_priv *rdata, |
559 | struct fc_frame *fp) | |
6755db1c | 560 | { |
6755db1c CL |
561 | unsigned long delay = FC_DEF_E_D_TOV; |
562 | ||
563 | /* make sure this isn't an FC_EX_CLOSED error, never retry those */ | |
564 | if (PTR_ERR(fp) == -FC_EX_CLOSED) | |
9fb9d328 | 565 | return fc_rport_error(rdata, fp); |
6755db1c | 566 | |
a3666955 | 567 | if (rdata->retries < rdata->local_port->max_rport_retry_count) { |
9fb9d328 JE |
568 | FC_RPORT_DBG(rdata, "Error %ld in state %s, retrying\n", |
569 | PTR_ERR(fp), fc_rport_state(rdata)); | |
6755db1c CL |
570 | rdata->retries++; |
571 | /* no additional delay on exchange timeouts */ | |
572 | if (PTR_ERR(fp) == -FC_EX_TIMEOUT) | |
573 | delay = 0; | |
6755db1c CL |
574 | schedule_delayed_work(&rdata->retry_work, delay); |
575 | return; | |
576 | } | |
577 | ||
9fb9d328 | 578 | return fc_rport_error(rdata, fp); |
6755db1c CL |
579 | } |
580 | ||
42e9a92f | 581 | /** |
3a3b42bf RL |
582 | * fc_rport_plogi_recv_resp() - Handler for ELS PLOGI responses |
583 | * @sp: The sequence the PLOGI is on | |
584 | * @fp: The PLOGI response frame | |
585 | * @rdata_arg: The remote port that sent the PLOGI response | |
42e9a92f RL |
586 | * |
587 | * Locking Note: This function will be called without the rport lock | |
588 | * held, but it will lock, call an _enter_* function or fc_rport_error | |
589 | * and then unlock the rport. | |
590 | */ | |
591 | static void fc_rport_plogi_resp(struct fc_seq *sp, struct fc_frame *fp, | |
9fb9d328 | 592 | void *rdata_arg) |
42e9a92f | 593 | { |
9fb9d328 | 594 | struct fc_rport_priv *rdata = rdata_arg; |
42e9a92f | 595 | struct fc_lport *lport = rdata->local_port; |
a29e7646 | 596 | struct fc_els_flogi *plp = NULL; |
42e9a92f RL |
597 | unsigned int tov; |
598 | u16 csp_seq; | |
599 | u16 cssp_seq; | |
600 | u8 op; | |
601 | ||
602 | mutex_lock(&rdata->rp_mutex); | |
603 | ||
f657d299 | 604 | FC_RPORT_DBG(rdata, "Received a PLOGI %s\n", fc_els_resp_type(fp)); |
42e9a92f RL |
605 | |
606 | if (rdata->rp_state != RPORT_ST_PLOGI) { | |
9fb9d328 JE |
607 | FC_RPORT_DBG(rdata, "Received a PLOGI response, but in state " |
608 | "%s\n", fc_rport_state(rdata)); | |
76f6804e AJ |
609 | if (IS_ERR(fp)) |
610 | goto err; | |
42e9a92f RL |
611 | goto out; |
612 | } | |
613 | ||
76f6804e | 614 | if (IS_ERR(fp)) { |
9fb9d328 | 615 | fc_rport_error_retry(rdata, fp); |
76f6804e AJ |
616 | goto err; |
617 | } | |
618 | ||
42e9a92f RL |
619 | op = fc_frame_payload_op(fp); |
620 | if (op == ELS_LS_ACC && | |
621 | (plp = fc_frame_payload_get(fp, sizeof(*plp))) != NULL) { | |
f211fa51 JE |
622 | rdata->ids.port_name = get_unaligned_be64(&plp->fl_wwpn); |
623 | rdata->ids.node_name = get_unaligned_be64(&plp->fl_wwnn); | |
42e9a92f RL |
624 | |
625 | tov = ntohl(plp->fl_csp.sp_e_d_tov); | |
626 | if (ntohs(plp->fl_csp.sp_features) & FC_SP_FT_EDTR) | |
3b709150 | 627 | tov /= 1000000; |
42e9a92f RL |
628 | if (tov > rdata->e_d_tov) |
629 | rdata->e_d_tov = tov; | |
630 | csp_seq = ntohs(plp->fl_csp.sp_tot_seq); | |
631 | cssp_seq = ntohs(plp->fl_cssp[3 - 1].cp_con_seq); | |
632 | if (cssp_seq < csp_seq) | |
633 | csp_seq = cssp_seq; | |
634 | rdata->max_seq = csp_seq; | |
f211fa51 | 635 | rdata->maxframe_size = fc_plogi_get_maxframe(plp, lport->mfs); |
3ac6f98f | 636 | fc_rport_enter_prli(rdata); |
42e9a92f | 637 | } else |
9fb9d328 | 638 | fc_rport_error_retry(rdata, fp); |
42e9a92f RL |
639 | |
640 | out: | |
641 | fc_frame_free(fp); | |
642 | err: | |
643 | mutex_unlock(&rdata->rp_mutex); | |
f211fa51 | 644 | kref_put(&rdata->kref, rdata->local_port->tt.rport_destroy); |
42e9a92f RL |
645 | } |
646 | ||
647 | /** | |
3a3b42bf RL |
648 | * fc_rport_enter_plogi() - Send Port Login (PLOGI) request |
649 | * @rdata: The remote port to send a PLOGI to | |
42e9a92f RL |
650 | * |
651 | * Locking Note: The rport lock is expected to be held before calling | |
652 | * this routine. | |
653 | */ | |
9fb9d328 | 654 | static void fc_rport_enter_plogi(struct fc_rport_priv *rdata) |
42e9a92f | 655 | { |
42e9a92f RL |
656 | struct fc_lport *lport = rdata->local_port; |
657 | struct fc_frame *fp; | |
658 | ||
9fb9d328 JE |
659 | FC_RPORT_DBG(rdata, "Port entered PLOGI state from %s state\n", |
660 | fc_rport_state(rdata)); | |
42e9a92f | 661 | |
9fb9d328 | 662 | fc_rport_state_enter(rdata, RPORT_ST_PLOGI); |
42e9a92f | 663 | |
f211fa51 | 664 | rdata->maxframe_size = FC_MIN_MAX_PAYLOAD; |
42e9a92f RL |
665 | fp = fc_frame_alloc(lport, sizeof(struct fc_els_flogi)); |
666 | if (!fp) { | |
9fb9d328 | 667 | fc_rport_error_retry(rdata, fp); |
42e9a92f RL |
668 | return; |
669 | } | |
670 | rdata->e_d_tov = lport->e_d_tov; | |
671 | ||
f211fa51 | 672 | if (!lport->tt.elsct_send(lport, rdata->ids.port_id, fp, ELS_PLOGI, |
b94f8951 JE |
673 | fc_rport_plogi_resp, rdata, |
674 | 2 * lport->r_a_tov)) | |
8f550f93 | 675 | fc_rport_error_retry(rdata, NULL); |
42e9a92f | 676 | else |
f211fa51 | 677 | kref_get(&rdata->kref); |
42e9a92f RL |
678 | } |
679 | ||
680 | /** | |
34f42a07 | 681 | * fc_rport_prli_resp() - Process Login (PRLI) response handler |
3a3b42bf RL |
682 | * @sp: The sequence the PRLI response was on |
683 | * @fp: The PRLI response frame | |
684 | * @rdata_arg: The remote port that sent the PRLI response | |
42e9a92f RL |
685 | * |
686 | * Locking Note: This function will be called without the rport lock | |
687 | * held, but it will lock, call an _enter_* function or fc_rport_error | |
688 | * and then unlock the rport. | |
689 | */ | |
690 | static void fc_rport_prli_resp(struct fc_seq *sp, struct fc_frame *fp, | |
9fb9d328 | 691 | void *rdata_arg) |
42e9a92f | 692 | { |
9fb9d328 | 693 | struct fc_rport_priv *rdata = rdata_arg; |
42e9a92f RL |
694 | struct { |
695 | struct fc_els_prli prli; | |
696 | struct fc_els_spp spp; | |
697 | } *pp; | |
698 | u32 roles = FC_RPORT_ROLE_UNKNOWN; | |
699 | u32 fcp_parm = 0; | |
700 | u8 op; | |
701 | ||
702 | mutex_lock(&rdata->rp_mutex); | |
703 | ||
f657d299 | 704 | FC_RPORT_DBG(rdata, "Received a PRLI %s\n", fc_els_resp_type(fp)); |
42e9a92f RL |
705 | |
706 | if (rdata->rp_state != RPORT_ST_PRLI) { | |
9fb9d328 JE |
707 | FC_RPORT_DBG(rdata, "Received a PRLI response, but in state " |
708 | "%s\n", fc_rport_state(rdata)); | |
76f6804e AJ |
709 | if (IS_ERR(fp)) |
710 | goto err; | |
42e9a92f RL |
711 | goto out; |
712 | } | |
713 | ||
76f6804e | 714 | if (IS_ERR(fp)) { |
9fb9d328 | 715 | fc_rport_error_retry(rdata, fp); |
76f6804e AJ |
716 | goto err; |
717 | } | |
718 | ||
6bd054cb RL |
719 | /* reinitialize remote port roles */ |
720 | rdata->ids.roles = FC_RPORT_ROLE_UNKNOWN; | |
721 | ||
42e9a92f RL |
722 | op = fc_frame_payload_op(fp); |
723 | if (op == ELS_LS_ACC) { | |
724 | pp = fc_frame_payload_get(fp, sizeof(*pp)); | |
725 | if (pp && pp->prli.prli_spp_len >= sizeof(pp->spp)) { | |
726 | fcp_parm = ntohl(pp->spp.spp_params); | |
727 | if (fcp_parm & FCP_SPPF_RETRY) | |
728 | rdata->flags |= FC_RP_FLAGS_RETRY; | |
729 | } | |
730 | ||
f211fa51 | 731 | rdata->supported_classes = FC_COS_CLASS3; |
42e9a92f RL |
732 | if (fcp_parm & FCP_SPPF_INIT_FCN) |
733 | roles |= FC_RPORT_ROLE_FCP_INITIATOR; | |
734 | if (fcp_parm & FCP_SPPF_TARG_FCN) | |
735 | roles |= FC_RPORT_ROLE_FCP_TARGET; | |
736 | ||
f211fa51 | 737 | rdata->ids.roles = roles; |
9fb9d328 | 738 | fc_rport_enter_rtv(rdata); |
42e9a92f RL |
739 | |
740 | } else { | |
9fb9d328 JE |
741 | FC_RPORT_DBG(rdata, "Bad ELS response for PRLI command\n"); |
742 | fc_rport_enter_delete(rdata, RPORT_EV_FAILED); | |
42e9a92f RL |
743 | } |
744 | ||
745 | out: | |
746 | fc_frame_free(fp); | |
747 | err: | |
748 | mutex_unlock(&rdata->rp_mutex); | |
f211fa51 | 749 | kref_put(&rdata->kref, rdata->local_port->tt.rport_destroy); |
42e9a92f RL |
750 | } |
751 | ||
752 | /** | |
3a3b42bf RL |
753 | * fc_rport_logo_resp() - Handler for logout (LOGO) responses |
754 | * @sp: The sequence the LOGO was on | |
755 | * @fp: The LOGO response frame | |
756 | * @rdata_arg: The remote port that sent the LOGO response | |
42e9a92f RL |
757 | * |
758 | * Locking Note: This function will be called without the rport lock | |
759 | * held, but it will lock, call an _enter_* function or fc_rport_error | |
760 | * and then unlock the rport. | |
761 | */ | |
762 | static void fc_rport_logo_resp(struct fc_seq *sp, struct fc_frame *fp, | |
9fb9d328 | 763 | void *rdata_arg) |
42e9a92f | 764 | { |
9fb9d328 | 765 | struct fc_rport_priv *rdata = rdata_arg; |
42e9a92f RL |
766 | u8 op; |
767 | ||
768 | mutex_lock(&rdata->rp_mutex); | |
769 | ||
f657d299 | 770 | FC_RPORT_DBG(rdata, "Received a LOGO %s\n", fc_els_resp_type(fp)); |
42e9a92f | 771 | |
42e9a92f | 772 | if (rdata->rp_state != RPORT_ST_LOGO) { |
9fb9d328 JE |
773 | FC_RPORT_DBG(rdata, "Received a LOGO response, but in state " |
774 | "%s\n", fc_rport_state(rdata)); | |
76f6804e AJ |
775 | if (IS_ERR(fp)) |
776 | goto err; | |
42e9a92f RL |
777 | goto out; |
778 | } | |
779 | ||
76f6804e | 780 | if (IS_ERR(fp)) { |
9fb9d328 | 781 | fc_rport_error_retry(rdata, fp); |
76f6804e AJ |
782 | goto err; |
783 | } | |
784 | ||
42e9a92f | 785 | op = fc_frame_payload_op(fp); |
68a1750b JE |
786 | if (op != ELS_LS_ACC) |
787 | FC_RPORT_DBG(rdata, "Bad ELS response op %x for LOGO command\n", | |
788 | op); | |
789 | fc_rport_enter_delete(rdata, RPORT_EV_LOGO); | |
42e9a92f RL |
790 | |
791 | out: | |
792 | fc_frame_free(fp); | |
793 | err: | |
794 | mutex_unlock(&rdata->rp_mutex); | |
f211fa51 | 795 | kref_put(&rdata->kref, rdata->local_port->tt.rport_destroy); |
42e9a92f RL |
796 | } |
797 | ||
798 | /** | |
3a3b42bf RL |
799 | * fc_rport_enter_prli() - Send Process Login (PRLI) request |
800 | * @rdata: The remote port to send the PRLI request to | |
42e9a92f RL |
801 | * |
802 | * Locking Note: The rport lock is expected to be held before calling | |
803 | * this routine. | |
804 | */ | |
9fb9d328 | 805 | static void fc_rport_enter_prli(struct fc_rport_priv *rdata) |
42e9a92f | 806 | { |
42e9a92f RL |
807 | struct fc_lport *lport = rdata->local_port; |
808 | struct { | |
809 | struct fc_els_prli prli; | |
810 | struct fc_els_spp spp; | |
811 | } *pp; | |
812 | struct fc_frame *fp; | |
813 | ||
3ac6f98f JE |
814 | /* |
815 | * If the rport is one of the well known addresses | |
816 | * we skip PRLI and RTV and go straight to READY. | |
817 | */ | |
818 | if (rdata->ids.port_id >= FC_FID_DOM_MGR) { | |
819 | fc_rport_enter_ready(rdata); | |
820 | return; | |
821 | } | |
822 | ||
9fb9d328 JE |
823 | FC_RPORT_DBG(rdata, "Port entered PRLI state from %s state\n", |
824 | fc_rport_state(rdata)); | |
42e9a92f | 825 | |
9fb9d328 | 826 | fc_rport_state_enter(rdata, RPORT_ST_PRLI); |
42e9a92f RL |
827 | |
828 | fp = fc_frame_alloc(lport, sizeof(*pp)); | |
829 | if (!fp) { | |
9fb9d328 | 830 | fc_rport_error_retry(rdata, fp); |
42e9a92f RL |
831 | return; |
832 | } | |
833 | ||
f211fa51 | 834 | if (!lport->tt.elsct_send(lport, rdata->ids.port_id, fp, ELS_PRLI, |
b94f8951 JE |
835 | fc_rport_prli_resp, rdata, |
836 | 2 * lport->r_a_tov)) | |
8f550f93 | 837 | fc_rport_error_retry(rdata, NULL); |
42e9a92f | 838 | else |
f211fa51 | 839 | kref_get(&rdata->kref); |
42e9a92f RL |
840 | } |
841 | ||
842 | /** | |
3a3b42bf RL |
843 | * fc_rport_els_rtv_resp() - Handler for Request Timeout Value (RTV) responses |
844 | * @sp: The sequence the RTV was on | |
845 | * @fp: The RTV response frame | |
846 | * @rdata_arg: The remote port that sent the RTV response | |
42e9a92f RL |
847 | * |
848 | * Many targets don't seem to support this. | |
849 | * | |
850 | * Locking Note: This function will be called without the rport lock | |
851 | * held, but it will lock, call an _enter_* function or fc_rport_error | |
852 | * and then unlock the rport. | |
853 | */ | |
854 | static void fc_rport_rtv_resp(struct fc_seq *sp, struct fc_frame *fp, | |
9fb9d328 | 855 | void *rdata_arg) |
42e9a92f | 856 | { |
9fb9d328 | 857 | struct fc_rport_priv *rdata = rdata_arg; |
42e9a92f RL |
858 | u8 op; |
859 | ||
860 | mutex_lock(&rdata->rp_mutex); | |
861 | ||
f657d299 | 862 | FC_RPORT_DBG(rdata, "Received a RTV %s\n", fc_els_resp_type(fp)); |
42e9a92f RL |
863 | |
864 | if (rdata->rp_state != RPORT_ST_RTV) { | |
9fb9d328 JE |
865 | FC_RPORT_DBG(rdata, "Received a RTV response, but in state " |
866 | "%s\n", fc_rport_state(rdata)); | |
76f6804e AJ |
867 | if (IS_ERR(fp)) |
868 | goto err; | |
42e9a92f RL |
869 | goto out; |
870 | } | |
871 | ||
76f6804e | 872 | if (IS_ERR(fp)) { |
9fb9d328 | 873 | fc_rport_error(rdata, fp); |
76f6804e AJ |
874 | goto err; |
875 | } | |
876 | ||
42e9a92f RL |
877 | op = fc_frame_payload_op(fp); |
878 | if (op == ELS_LS_ACC) { | |
879 | struct fc_els_rtv_acc *rtv; | |
880 | u32 toq; | |
881 | u32 tov; | |
882 | ||
883 | rtv = fc_frame_payload_get(fp, sizeof(*rtv)); | |
884 | if (rtv) { | |
885 | toq = ntohl(rtv->rtv_toq); | |
886 | tov = ntohl(rtv->rtv_r_a_tov); | |
887 | if (tov == 0) | |
888 | tov = 1; | |
889 | rdata->r_a_tov = tov; | |
890 | tov = ntohl(rtv->rtv_e_d_tov); | |
891 | if (toq & FC_ELS_RTV_EDRES) | |
892 | tov /= 1000000; | |
893 | if (tov == 0) | |
894 | tov = 1; | |
895 | rdata->e_d_tov = tov; | |
896 | } | |
897 | } | |
898 | ||
9fb9d328 | 899 | fc_rport_enter_ready(rdata); |
42e9a92f RL |
900 | |
901 | out: | |
902 | fc_frame_free(fp); | |
903 | err: | |
904 | mutex_unlock(&rdata->rp_mutex); | |
f211fa51 | 905 | kref_put(&rdata->kref, rdata->local_port->tt.rport_destroy); |
42e9a92f RL |
906 | } |
907 | ||
908 | /** | |
3a3b42bf RL |
909 | * fc_rport_enter_rtv() - Send Request Timeout Value (RTV) request |
910 | * @rdata: The remote port to send the RTV request to | |
42e9a92f RL |
911 | * |
912 | * Locking Note: The rport lock is expected to be held before calling | |
913 | * this routine. | |
914 | */ | |
9fb9d328 | 915 | static void fc_rport_enter_rtv(struct fc_rport_priv *rdata) |
42e9a92f RL |
916 | { |
917 | struct fc_frame *fp; | |
42e9a92f RL |
918 | struct fc_lport *lport = rdata->local_port; |
919 | ||
9fb9d328 JE |
920 | FC_RPORT_DBG(rdata, "Port entered RTV state from %s state\n", |
921 | fc_rport_state(rdata)); | |
42e9a92f | 922 | |
9fb9d328 | 923 | fc_rport_state_enter(rdata, RPORT_ST_RTV); |
42e9a92f RL |
924 | |
925 | fp = fc_frame_alloc(lport, sizeof(struct fc_els_rtv)); | |
926 | if (!fp) { | |
9fb9d328 | 927 | fc_rport_error_retry(rdata, fp); |
42e9a92f RL |
928 | return; |
929 | } | |
930 | ||
f211fa51 | 931 | if (!lport->tt.elsct_send(lport, rdata->ids.port_id, fp, ELS_RTV, |
b94f8951 JE |
932 | fc_rport_rtv_resp, rdata, |
933 | 2 * lport->r_a_tov)) | |
8f550f93 | 934 | fc_rport_error_retry(rdata, NULL); |
42e9a92f | 935 | else |
f211fa51 | 936 | kref_get(&rdata->kref); |
42e9a92f RL |
937 | } |
938 | ||
939 | /** | |
3a3b42bf RL |
940 | * fc_rport_enter_logo() - Send a logout (LOGO) request |
941 | * @rdata: The remote port to send the LOGO request to | |
42e9a92f RL |
942 | * |
943 | * Locking Note: The rport lock is expected to be held before calling | |
944 | * this routine. | |
945 | */ | |
9fb9d328 | 946 | static void fc_rport_enter_logo(struct fc_rport_priv *rdata) |
42e9a92f | 947 | { |
42e9a92f RL |
948 | struct fc_lport *lport = rdata->local_port; |
949 | struct fc_frame *fp; | |
950 | ||
9fb9d328 JE |
951 | FC_RPORT_DBG(rdata, "Port entered LOGO state from %s state\n", |
952 | fc_rport_state(rdata)); | |
42e9a92f | 953 | |
9fb9d328 | 954 | fc_rport_state_enter(rdata, RPORT_ST_LOGO); |
42e9a92f RL |
955 | |
956 | fp = fc_frame_alloc(lport, sizeof(struct fc_els_logo)); | |
957 | if (!fp) { | |
9fb9d328 | 958 | fc_rport_error_retry(rdata, fp); |
42e9a92f RL |
959 | return; |
960 | } | |
961 | ||
f211fa51 | 962 | if (!lport->tt.elsct_send(lport, rdata->ids.port_id, fp, ELS_LOGO, |
b94f8951 JE |
963 | fc_rport_logo_resp, rdata, |
964 | 2 * lport->r_a_tov)) | |
8f550f93 | 965 | fc_rport_error_retry(rdata, NULL); |
42e9a92f | 966 | else |
f211fa51 | 967 | kref_get(&rdata->kref); |
42e9a92f RL |
968 | } |
969 | ||
370c3bd0 | 970 | /** |
3a3b42bf RL |
971 | * fc_rport_els_adisc_resp() - Handler for Address Discovery (ADISC) responses |
972 | * @sp: The sequence the ADISC response was on | |
973 | * @fp: The ADISC response frame | |
974 | * @rdata_arg: The remote port that sent the ADISC response | |
370c3bd0 JE |
975 | * |
976 | * Locking Note: This function will be called without the rport lock | |
977 | * held, but it will lock, call an _enter_* function or fc_rport_error | |
978 | * and then unlock the rport. | |
979 | */ | |
980 | static void fc_rport_adisc_resp(struct fc_seq *sp, struct fc_frame *fp, | |
3a3b42bf | 981 | void *rdata_arg) |
370c3bd0 JE |
982 | { |
983 | struct fc_rport_priv *rdata = rdata_arg; | |
984 | struct fc_els_adisc *adisc; | |
985 | u8 op; | |
986 | ||
987 | mutex_lock(&rdata->rp_mutex); | |
988 | ||
989 | FC_RPORT_DBG(rdata, "Received a ADISC response\n"); | |
990 | ||
991 | if (rdata->rp_state != RPORT_ST_ADISC) { | |
992 | FC_RPORT_DBG(rdata, "Received a ADISC resp but in state %s\n", | |
993 | fc_rport_state(rdata)); | |
994 | if (IS_ERR(fp)) | |
995 | goto err; | |
996 | goto out; | |
997 | } | |
998 | ||
999 | if (IS_ERR(fp)) { | |
1000 | fc_rport_error(rdata, fp); | |
1001 | goto err; | |
1002 | } | |
1003 | ||
1004 | /* | |
1005 | * If address verification failed. Consider us logged out of the rport. | |
1006 | * Since the rport is still in discovery, we want to be | |
1007 | * logged in, so go to PLOGI state. Otherwise, go back to READY. | |
1008 | */ | |
1009 | op = fc_frame_payload_op(fp); | |
1010 | adisc = fc_frame_payload_get(fp, sizeof(*adisc)); | |
1011 | if (op != ELS_LS_ACC || !adisc || | |
1012 | ntoh24(adisc->adisc_port_id) != rdata->ids.port_id || | |
1013 | get_unaligned_be64(&adisc->adisc_wwpn) != rdata->ids.port_name || | |
1014 | get_unaligned_be64(&adisc->adisc_wwnn) != rdata->ids.node_name) { | |
1015 | FC_RPORT_DBG(rdata, "ADISC error or mismatch\n"); | |
1016 | fc_rport_enter_plogi(rdata); | |
1017 | } else { | |
1018 | FC_RPORT_DBG(rdata, "ADISC OK\n"); | |
1019 | fc_rport_enter_ready(rdata); | |
1020 | } | |
1021 | out: | |
1022 | fc_frame_free(fp); | |
1023 | err: | |
1024 | mutex_unlock(&rdata->rp_mutex); | |
1025 | kref_put(&rdata->kref, rdata->local_port->tt.rport_destroy); | |
1026 | } | |
1027 | ||
1028 | /** | |
3a3b42bf RL |
1029 | * fc_rport_enter_adisc() - Send Address Discover (ADISC) request |
1030 | * @rdata: The remote port to send the ADISC request to | |
370c3bd0 JE |
1031 | * |
1032 | * Locking Note: The rport lock is expected to be held before calling | |
1033 | * this routine. | |
1034 | */ | |
1035 | static void fc_rport_enter_adisc(struct fc_rport_priv *rdata) | |
1036 | { | |
1037 | struct fc_lport *lport = rdata->local_port; | |
1038 | struct fc_frame *fp; | |
1039 | ||
1040 | FC_RPORT_DBG(rdata, "sending ADISC from %s state\n", | |
1041 | fc_rport_state(rdata)); | |
1042 | ||
1043 | fc_rport_state_enter(rdata, RPORT_ST_ADISC); | |
1044 | ||
1045 | fp = fc_frame_alloc(lport, sizeof(struct fc_els_adisc)); | |
1046 | if (!fp) { | |
1047 | fc_rport_error_retry(rdata, fp); | |
1048 | return; | |
1049 | } | |
1050 | if (!lport->tt.elsct_send(lport, rdata->ids.port_id, fp, ELS_ADISC, | |
b94f8951 JE |
1051 | fc_rport_adisc_resp, rdata, |
1052 | 2 * lport->r_a_tov)) | |
8f550f93 | 1053 | fc_rport_error_retry(rdata, NULL); |
370c3bd0 JE |
1054 | else |
1055 | kref_get(&rdata->kref); | |
1056 | } | |
1057 | ||
8abbe3a4 | 1058 | /** |
3a3b42bf RL |
1059 | * fc_rport_recv_adisc_req() - Handler for Address Discovery (ADISC) requests |
1060 | * @rdata: The remote port that sent the ADISC request | |
1061 | * @sp: The sequence the ADISC request was on | |
1062 | * @in_fp: The ADISC request frame | |
8abbe3a4 JE |
1063 | * |
1064 | * Locking Note: Called with the lport and rport locks held. | |
1065 | */ | |
1066 | static void fc_rport_recv_adisc_req(struct fc_rport_priv *rdata, | |
1067 | struct fc_seq *sp, struct fc_frame *in_fp) | |
1068 | { | |
1069 | struct fc_lport *lport = rdata->local_port; | |
1070 | struct fc_frame *fp; | |
1071 | struct fc_exch *ep = fc_seq_exch(sp); | |
1072 | struct fc_els_adisc *adisc; | |
1073 | struct fc_seq_els_data rjt_data; | |
1074 | u32 f_ctl; | |
1075 | ||
1076 | FC_RPORT_DBG(rdata, "Received ADISC request\n"); | |
1077 | ||
1078 | adisc = fc_frame_payload_get(in_fp, sizeof(*adisc)); | |
1079 | if (!adisc) { | |
1080 | rjt_data.fp = NULL; | |
1081 | rjt_data.reason = ELS_RJT_PROT; | |
1082 | rjt_data.explan = ELS_EXPL_INV_LEN; | |
1083 | lport->tt.seq_els_rsp_send(sp, ELS_LS_RJT, &rjt_data); | |
1084 | goto drop; | |
1085 | } | |
1086 | ||
1087 | fp = fc_frame_alloc(lport, sizeof(*adisc)); | |
1088 | if (!fp) | |
1089 | goto drop; | |
1090 | fc_adisc_fill(lport, fp); | |
1091 | adisc = fc_frame_payload_get(fp, sizeof(*adisc)); | |
1092 | adisc->adisc_cmd = ELS_LS_ACC; | |
1093 | sp = lport->tt.seq_start_next(sp); | |
1094 | f_ctl = FC_FC_EX_CTX | FC_FC_LAST_SEQ | FC_FC_END_SEQ | FC_FC_SEQ_INIT; | |
1095 | fc_fill_fc_hdr(fp, FC_RCTL_ELS_REP, ep->did, ep->sid, | |
1096 | FC_TYPE_ELS, f_ctl, 0); | |
1097 | lport->tt.seq_send(lport, sp, fp); | |
1098 | drop: | |
1099 | fc_frame_free(in_fp); | |
1100 | } | |
1101 | ||
63e27fb8 YZ |
1102 | /** |
1103 | * fc_rport_recv_rls_req() - Handle received Read Link Status request | |
1104 | * @rdata: The remote port that sent the RLS request | |
1105 | * @sp: The sequence that the RLS was on | |
1106 | * @rx_fp: The PRLI request frame | |
1107 | * | |
1108 | * Locking Note: The rport lock is expected to be held before calling | |
1109 | * this function. | |
1110 | */ | |
1111 | static void fc_rport_recv_rls_req(struct fc_rport_priv *rdata, | |
1112 | struct fc_seq *sp, struct fc_frame *rx_fp) | |
1113 | ||
1114 | { | |
1115 | struct fc_lport *lport = rdata->local_port; | |
1116 | struct fc_frame *fp; | |
1117 | struct fc_exch *ep = fc_seq_exch(sp); | |
1118 | struct fc_els_rls *rls; | |
1119 | struct fc_els_rls_resp *rsp; | |
1120 | struct fc_els_lesb *lesb; | |
1121 | struct fc_seq_els_data rjt_data; | |
1122 | struct fc_host_statistics *hst; | |
1123 | u32 f_ctl; | |
1124 | ||
1125 | FC_RPORT_DBG(rdata, "Received RLS request while in state %s\n", | |
1126 | fc_rport_state(rdata)); | |
1127 | ||
1128 | rls = fc_frame_payload_get(rx_fp, sizeof(*rls)); | |
1129 | if (!rls) { | |
1130 | rjt_data.reason = ELS_RJT_PROT; | |
1131 | rjt_data.explan = ELS_EXPL_INV_LEN; | |
1132 | goto out_rjt; | |
1133 | } | |
1134 | ||
1135 | fp = fc_frame_alloc(lport, sizeof(*rsp)); | |
1136 | if (!fp) { | |
1137 | rjt_data.reason = ELS_RJT_UNAB; | |
1138 | rjt_data.explan = ELS_EXPL_INSUF_RES; | |
1139 | goto out_rjt; | |
1140 | } | |
1141 | ||
1142 | rsp = fc_frame_payload_get(fp, sizeof(*rsp)); | |
1143 | memset(rsp, 0, sizeof(*rsp)); | |
1144 | rsp->rls_cmd = ELS_LS_ACC; | |
1145 | lesb = &rsp->rls_lesb; | |
1146 | if (lport->tt.get_lesb) { | |
1147 | /* get LESB from LLD if it supports it */ | |
1148 | lport->tt.get_lesb(lport, lesb); | |
1149 | } else { | |
1150 | fc_get_host_stats(lport->host); | |
1151 | hst = &lport->host_stats; | |
1152 | lesb->lesb_link_fail = htonl(hst->link_failure_count); | |
1153 | lesb->lesb_sync_loss = htonl(hst->loss_of_sync_count); | |
1154 | lesb->lesb_sig_loss = htonl(hst->loss_of_signal_count); | |
1155 | lesb->lesb_prim_err = htonl(hst->prim_seq_protocol_err_count); | |
1156 | lesb->lesb_inv_word = htonl(hst->invalid_tx_word_count); | |
1157 | lesb->lesb_inv_crc = htonl(hst->invalid_crc_count); | |
1158 | } | |
1159 | ||
1160 | sp = lport->tt.seq_start_next(sp); | |
1161 | f_ctl = FC_FC_EX_CTX | FC_FC_LAST_SEQ | FC_FC_END_SEQ; | |
1162 | fc_fill_fc_hdr(fp, FC_RCTL_ELS_REP, ep->did, ep->sid, | |
1163 | FC_TYPE_ELS, f_ctl, 0); | |
1164 | lport->tt.seq_send(lport, sp, fp); | |
1165 | goto out; | |
1166 | ||
1167 | out_rjt: | |
1168 | rjt_data.fp = NULL; | |
1169 | lport->tt.seq_els_rsp_send(sp, ELS_LS_RJT, &rjt_data); | |
1170 | out: | |
1171 | fc_frame_free(rx_fp); | |
1172 | } | |
1173 | ||
42e9a92f | 1174 | /** |
3a3b42bf RL |
1175 | * fc_rport_recv_els_req() - Handler for validated ELS requests |
1176 | * @lport: The local port that received the ELS request | |
1177 | * @sp: The sequence that the ELS request was on | |
1178 | * @fp: The ELS request frame | |
83fe6a93 JE |
1179 | * |
1180 | * Handle incoming ELS requests that require port login. | |
1181 | * The ELS opcode has already been validated by the caller. | |
42e9a92f | 1182 | * |
131203a1 | 1183 | * Locking Note: Called with the lport lock held. |
42e9a92f | 1184 | */ |
83fe6a93 JE |
1185 | static void fc_rport_recv_els_req(struct fc_lport *lport, |
1186 | struct fc_seq *sp, struct fc_frame *fp) | |
42e9a92f | 1187 | { |
131203a1 | 1188 | struct fc_rport_priv *rdata; |
42e9a92f RL |
1189 | struct fc_frame_header *fh; |
1190 | struct fc_seq_els_data els_data; | |
42e9a92f | 1191 | |
42e9a92f | 1192 | els_data.fp = NULL; |
83fe6a93 JE |
1193 | els_data.reason = ELS_RJT_UNAB; |
1194 | els_data.explan = ELS_EXPL_PLOGI_REQD; | |
3ac6f98f | 1195 | |
42e9a92f RL |
1196 | fh = fc_frame_header_get(fp); |
1197 | ||
25b37b98 | 1198 | mutex_lock(&lport->disc.disc_mutex); |
83fe6a93 | 1199 | rdata = lport->tt.rport_lookup(lport, ntoh24(fh->fh_s_id)); |
131203a1 | 1200 | if (!rdata) { |
25b37b98 | 1201 | mutex_unlock(&lport->disc.disc_mutex); |
83fe6a93 | 1202 | goto reject; |
131203a1 JE |
1203 | } |
1204 | mutex_lock(&rdata->rp_mutex); | |
25b37b98 | 1205 | mutex_unlock(&lport->disc.disc_mutex); |
131203a1 | 1206 | |
83fe6a93 JE |
1207 | switch (rdata->rp_state) { |
1208 | case RPORT_ST_PRLI: | |
1209 | case RPORT_ST_RTV: | |
1210 | case RPORT_ST_READY: | |
370c3bd0 | 1211 | case RPORT_ST_ADISC: |
83fe6a93 JE |
1212 | break; |
1213 | default: | |
1214 | mutex_unlock(&rdata->rp_mutex); | |
1215 | goto reject; | |
1216 | } | |
1217 | ||
1218 | switch (fc_frame_payload_op(fp)) { | |
131203a1 JE |
1219 | case ELS_PRLI: |
1220 | fc_rport_recv_prli_req(rdata, sp, fp); | |
1221 | break; | |
1222 | case ELS_PRLO: | |
1223 | fc_rport_recv_prlo_req(rdata, sp, fp); | |
1224 | break; | |
8abbe3a4 JE |
1225 | case ELS_ADISC: |
1226 | fc_rport_recv_adisc_req(rdata, sp, fp); | |
1227 | break; | |
131203a1 JE |
1228 | case ELS_RRQ: |
1229 | els_data.fp = fp; | |
1230 | lport->tt.seq_els_rsp_send(sp, ELS_RRQ, &els_data); | |
1231 | break; | |
1232 | case ELS_REC: | |
1233 | els_data.fp = fp; | |
1234 | lport->tt.seq_els_rsp_send(sp, ELS_REC, &els_data); | |
1235 | break; | |
63e27fb8 YZ |
1236 | case ELS_RLS: |
1237 | fc_rport_recv_rls_req(rdata, sp, fp); | |
1238 | break; | |
131203a1 | 1239 | default: |
83fe6a93 | 1240 | fc_frame_free(fp); /* can't happen */ |
131203a1 | 1241 | break; |
42e9a92f RL |
1242 | } |
1243 | ||
1244 | mutex_unlock(&rdata->rp_mutex); | |
83fe6a93 JE |
1245 | return; |
1246 | ||
1247 | reject: | |
1248 | lport->tt.seq_els_rsp_send(sp, ELS_LS_RJT, &els_data); | |
1249 | fc_frame_free(fp); | |
1250 | } | |
1251 | ||
1252 | /** | |
3a3b42bf RL |
1253 | * fc_rport_recv_req() - Handler for requests |
1254 | * @sp: The sequence the request was on | |
1255 | * @fp: The request frame | |
1256 | * @lport: The local port that received the request | |
83fe6a93 JE |
1257 | * |
1258 | * Locking Note: Called with the lport lock held. | |
1259 | */ | |
1260 | void fc_rport_recv_req(struct fc_seq *sp, struct fc_frame *fp, | |
1261 | struct fc_lport *lport) | |
1262 | { | |
1263 | struct fc_seq_els_data els_data; | |
1264 | ||
1265 | /* | |
1266 | * Handle PLOGI and LOGO requests separately, since they | |
1267 | * don't require prior login. | |
1268 | * Check for unsupported opcodes first and reject them. | |
1269 | * For some ops, it would be incorrect to reject with "PLOGI required". | |
1270 | */ | |
1271 | switch (fc_frame_payload_op(fp)) { | |
1272 | case ELS_PLOGI: | |
1273 | fc_rport_recv_plogi_req(lport, sp, fp); | |
1274 | break; | |
1275 | case ELS_LOGO: | |
1276 | fc_rport_recv_logo_req(lport, sp, fp); | |
1277 | break; | |
1278 | case ELS_PRLI: | |
1279 | case ELS_PRLO: | |
8abbe3a4 | 1280 | case ELS_ADISC: |
83fe6a93 JE |
1281 | case ELS_RRQ: |
1282 | case ELS_REC: | |
63e27fb8 | 1283 | case ELS_RLS: |
83fe6a93 JE |
1284 | fc_rport_recv_els_req(lport, sp, fp); |
1285 | break; | |
1286 | default: | |
1287 | fc_frame_free(fp); | |
1288 | els_data.fp = NULL; | |
1289 | els_data.reason = ELS_RJT_UNSUP; | |
1290 | els_data.explan = ELS_EXPL_NONE; | |
1291 | lport->tt.seq_els_rsp_send(sp, ELS_LS_RJT, &els_data); | |
1292 | break; | |
1293 | } | |
42e9a92f RL |
1294 | } |
1295 | ||
1296 | /** | |
3a3b42bf RL |
1297 | * fc_rport_recv_plogi_req() - Handler for Port Login (PLOGI) requests |
1298 | * @lport: The local port that received the PLOGI request | |
1299 | * @sp: The sequence that the PLOGI request was on | |
1300 | * @rx_fp: The PLOGI request frame | |
42e9a92f | 1301 | * |
3ac6f98f | 1302 | * Locking Note: The rport lock is held before calling this function. |
42e9a92f | 1303 | */ |
3ac6f98f | 1304 | static void fc_rport_recv_plogi_req(struct fc_lport *lport, |
42e9a92f RL |
1305 | struct fc_seq *sp, struct fc_frame *rx_fp) |
1306 | { | |
3ac6f98f JE |
1307 | struct fc_disc *disc; |
1308 | struct fc_rport_priv *rdata; | |
42e9a92f RL |
1309 | struct fc_frame *fp = rx_fp; |
1310 | struct fc_exch *ep; | |
1311 | struct fc_frame_header *fh; | |
1312 | struct fc_els_flogi *pl; | |
1313 | struct fc_seq_els_data rjt_data; | |
3ac6f98f | 1314 | u32 sid, f_ctl; |
42e9a92f | 1315 | |
3ac6f98f | 1316 | rjt_data.fp = NULL; |
42e9a92f | 1317 | fh = fc_frame_header_get(fp); |
3ac6f98f | 1318 | sid = ntoh24(fh->fh_s_id); |
42e9a92f | 1319 | |
3ac6f98f | 1320 | FC_RPORT_ID_DBG(lport, sid, "Received PLOGI request\n"); |
42e9a92f | 1321 | |
42e9a92f RL |
1322 | pl = fc_frame_payload_get(fp, sizeof(*pl)); |
1323 | if (!pl) { | |
3ac6f98f JE |
1324 | FC_RPORT_ID_DBG(lport, sid, "Received PLOGI too short\n"); |
1325 | rjt_data.reason = ELS_RJT_PROT; | |
1326 | rjt_data.explan = ELS_EXPL_INV_LEN; | |
1327 | goto reject; | |
42e9a92f | 1328 | } |
3ac6f98f JE |
1329 | |
1330 | disc = &lport->disc; | |
1331 | mutex_lock(&disc->disc_mutex); | |
1332 | rdata = lport->tt.rport_create(lport, sid); | |
1333 | if (!rdata) { | |
1334 | mutex_unlock(&disc->disc_mutex); | |
1335 | rjt_data.reason = ELS_RJT_UNAB; | |
1336 | rjt_data.explan = ELS_EXPL_INSUF_RES; | |
1337 | goto reject; | |
1338 | } | |
1339 | ||
1340 | mutex_lock(&rdata->rp_mutex); | |
1341 | mutex_unlock(&disc->disc_mutex); | |
1342 | ||
1343 | rdata->ids.port_name = get_unaligned_be64(&pl->fl_wwpn); | |
1344 | rdata->ids.node_name = get_unaligned_be64(&pl->fl_wwnn); | |
42e9a92f RL |
1345 | |
1346 | /* | |
3ac6f98f | 1347 | * If the rport was just created, possibly due to the incoming PLOGI, |
42e9a92f RL |
1348 | * set the state appropriately and accept the PLOGI. |
1349 | * | |
1350 | * If we had also sent a PLOGI, and if the received PLOGI is from a | |
1351 | * higher WWPN, we accept it, otherwise an LS_RJT is sent with reason | |
1352 | * "command already in progress". | |
1353 | * | |
1354 | * XXX TBD: If the session was ready before, the PLOGI should result in | |
1355 | * all outstanding exchanges being reset. | |
1356 | */ | |
1357 | switch (rdata->rp_state) { | |
1358 | case RPORT_ST_INIT: | |
3ac6f98f | 1359 | FC_RPORT_DBG(rdata, "Received PLOGI in INIT state\n"); |
42e9a92f RL |
1360 | break; |
1361 | case RPORT_ST_PLOGI: | |
3ac6f98f JE |
1362 | FC_RPORT_DBG(rdata, "Received PLOGI in PLOGI state\n"); |
1363 | if (rdata->ids.port_name < lport->wwpn) { | |
1364 | mutex_unlock(&rdata->rp_mutex); | |
1365 | rjt_data.reason = ELS_RJT_INPROG; | |
1366 | rjt_data.explan = ELS_EXPL_NONE; | |
1367 | goto reject; | |
1368 | } | |
42e9a92f RL |
1369 | break; |
1370 | case RPORT_ST_PRLI: | |
b4a9c7ed | 1371 | case RPORT_ST_RTV: |
42e9a92f | 1372 | case RPORT_ST_READY: |
370c3bd0 JE |
1373 | case RPORT_ST_ADISC: |
1374 | FC_RPORT_DBG(rdata, "Received PLOGI in logged-in state %d " | |
1375 | "- ignored for now\n", rdata->rp_state); | |
1376 | /* XXX TBD - should reset */ | |
42e9a92f | 1377 | break; |
14194054 | 1378 | case RPORT_ST_DELETE: |
b4a9c7ed JE |
1379 | case RPORT_ST_LOGO: |
1380 | case RPORT_ST_RESTART: | |
1381 | FC_RPORT_DBG(rdata, "Received PLOGI in state %s - send busy\n", | |
1382 | fc_rport_state(rdata)); | |
1383 | mutex_unlock(&rdata->rp_mutex); | |
1384 | rjt_data.reason = ELS_RJT_BUSY; | |
1385 | rjt_data.explan = ELS_EXPL_NONE; | |
1386 | goto reject; | |
42e9a92f RL |
1387 | } |
1388 | ||
3ac6f98f JE |
1389 | /* |
1390 | * Get session payload size from incoming PLOGI. | |
1391 | */ | |
1392 | rdata->maxframe_size = fc_plogi_get_maxframe(pl, lport->mfs); | |
1393 | fc_frame_free(rx_fp); | |
1394 | ||
1395 | /* | |
1396 | * Send LS_ACC. If this fails, the originator should retry. | |
1397 | */ | |
1398 | sp = lport->tt.seq_start_next(sp); | |
1399 | if (!sp) | |
1400 | goto out; | |
1401 | fp = fc_frame_alloc(lport, sizeof(*pl)); | |
1402 | if (!fp) | |
1403 | goto out; | |
1404 | ||
1405 | fc_plogi_fill(lport, fp, ELS_LS_ACC); | |
1406 | f_ctl = FC_FC_EX_CTX | FC_FC_LAST_SEQ | FC_FC_END_SEQ | FC_FC_SEQ_INIT; | |
1407 | ep = fc_seq_exch(sp); | |
1408 | fc_fill_fc_hdr(fp, FC_RCTL_ELS_REP, ep->did, ep->sid, | |
1409 | FC_TYPE_ELS, f_ctl, 0); | |
1410 | lport->tt.seq_send(lport, sp, fp); | |
1411 | fc_rport_enter_prli(rdata); | |
1412 | out: | |
1413 | mutex_unlock(&rdata->rp_mutex); | |
1414 | return; | |
1415 | ||
1416 | reject: | |
1417 | lport->tt.seq_els_rsp_send(sp, ELS_LS_RJT, &rjt_data); | |
1418 | fc_frame_free(fp); | |
42e9a92f RL |
1419 | } |
1420 | ||
1421 | /** | |
3a3b42bf RL |
1422 | * fc_rport_recv_prli_req() - Handler for process login (PRLI) requests |
1423 | * @rdata: The remote port that sent the PRLI request | |
1424 | * @sp: The sequence that the PRLI was on | |
1425 | * @rx_fp: The PRLI request frame | |
42e9a92f RL |
1426 | * |
1427 | * Locking Note: The rport lock is exected to be held before calling | |
1428 | * this function. | |
1429 | */ | |
9fb9d328 | 1430 | static void fc_rport_recv_prli_req(struct fc_rport_priv *rdata, |
42e9a92f RL |
1431 | struct fc_seq *sp, struct fc_frame *rx_fp) |
1432 | { | |
42e9a92f RL |
1433 | struct fc_lport *lport = rdata->local_port; |
1434 | struct fc_exch *ep; | |
1435 | struct fc_frame *fp; | |
1436 | struct fc_frame_header *fh; | |
1437 | struct { | |
1438 | struct fc_els_prli prli; | |
1439 | struct fc_els_spp spp; | |
1440 | } *pp; | |
1441 | struct fc_els_spp *rspp; /* request service param page */ | |
1442 | struct fc_els_spp *spp; /* response spp */ | |
1443 | unsigned int len; | |
1444 | unsigned int plen; | |
1445 | enum fc_els_rjt_reason reason = ELS_RJT_UNAB; | |
1446 | enum fc_els_rjt_explan explan = ELS_EXPL_NONE; | |
1447 | enum fc_els_spp_resp resp; | |
1448 | struct fc_seq_els_data rjt_data; | |
1449 | u32 f_ctl; | |
1450 | u32 fcp_parm; | |
1451 | u32 roles = FC_RPORT_ROLE_UNKNOWN; | |
1452 | rjt_data.fp = NULL; | |
1453 | ||
1454 | fh = fc_frame_header_get(rx_fp); | |
1455 | ||
9fb9d328 JE |
1456 | FC_RPORT_DBG(rdata, "Received PRLI request while in state %s\n", |
1457 | fc_rport_state(rdata)); | |
42e9a92f RL |
1458 | |
1459 | switch (rdata->rp_state) { | |
1460 | case RPORT_ST_PRLI: | |
3ac6f98f | 1461 | case RPORT_ST_RTV: |
42e9a92f | 1462 | case RPORT_ST_READY: |
370c3bd0 | 1463 | case RPORT_ST_ADISC: |
42e9a92f RL |
1464 | reason = ELS_RJT_NONE; |
1465 | break; | |
1466 | default: | |
b4c6f546 AJ |
1467 | fc_frame_free(rx_fp); |
1468 | return; | |
42e9a92f RL |
1469 | break; |
1470 | } | |
1471 | len = fr_len(rx_fp) - sizeof(*fh); | |
1472 | pp = fc_frame_payload_get(rx_fp, sizeof(*pp)); | |
1473 | if (pp == NULL) { | |
1474 | reason = ELS_RJT_PROT; | |
1475 | explan = ELS_EXPL_INV_LEN; | |
1476 | } else { | |
1477 | plen = ntohs(pp->prli.prli_len); | |
1478 | if ((plen % 4) != 0 || plen > len) { | |
1479 | reason = ELS_RJT_PROT; | |
1480 | explan = ELS_EXPL_INV_LEN; | |
1481 | } else if (plen < len) { | |
1482 | len = plen; | |
1483 | } | |
1484 | plen = pp->prli.prli_spp_len; | |
1485 | if ((plen % 4) != 0 || plen < sizeof(*spp) || | |
1486 | plen > len || len < sizeof(*pp)) { | |
1487 | reason = ELS_RJT_PROT; | |
1488 | explan = ELS_EXPL_INV_LEN; | |
1489 | } | |
1490 | rspp = &pp->spp; | |
1491 | } | |
1492 | if (reason != ELS_RJT_NONE || | |
1493 | (fp = fc_frame_alloc(lport, len)) == NULL) { | |
1494 | rjt_data.reason = reason; | |
1495 | rjt_data.explan = explan; | |
1496 | lport->tt.seq_els_rsp_send(sp, ELS_LS_RJT, &rjt_data); | |
1497 | } else { | |
1498 | sp = lport->tt.seq_start_next(sp); | |
1499 | WARN_ON(!sp); | |
1500 | pp = fc_frame_payload_get(fp, len); | |
1501 | WARN_ON(!pp); | |
1502 | memset(pp, 0, len); | |
1503 | pp->prli.prli_cmd = ELS_LS_ACC; | |
1504 | pp->prli.prli_spp_len = plen; | |
1505 | pp->prli.prli_len = htons(len); | |
1506 | len -= sizeof(struct fc_els_prli); | |
1507 | ||
6bd054cb RL |
1508 | /* reinitialize remote port roles */ |
1509 | rdata->ids.roles = FC_RPORT_ROLE_UNKNOWN; | |
1510 | ||
42e9a92f RL |
1511 | /* |
1512 | * Go through all the service parameter pages and build | |
1513 | * response. If plen indicates longer SPP than standard, | |
1514 | * use that. The entire response has been pre-cleared above. | |
1515 | */ | |
1516 | spp = &pp->spp; | |
1517 | while (len >= plen) { | |
1518 | spp->spp_type = rspp->spp_type; | |
1519 | spp->spp_type_ext = rspp->spp_type_ext; | |
1520 | spp->spp_flags = rspp->spp_flags & FC_SPP_EST_IMG_PAIR; | |
1521 | resp = FC_SPP_RESP_ACK; | |
1522 | if (rspp->spp_flags & FC_SPP_RPA_VAL) | |
1523 | resp = FC_SPP_RESP_NO_PA; | |
1524 | switch (rspp->spp_type) { | |
1525 | case 0: /* common to all FC-4 types */ | |
1526 | break; | |
1527 | case FC_TYPE_FCP: | |
1528 | fcp_parm = ntohl(rspp->spp_params); | |
85b5893c | 1529 | if (fcp_parm & FCP_SPPF_RETRY) |
42e9a92f | 1530 | rdata->flags |= FC_RP_FLAGS_RETRY; |
f211fa51 | 1531 | rdata->supported_classes = FC_COS_CLASS3; |
42e9a92f RL |
1532 | if (fcp_parm & FCP_SPPF_INIT_FCN) |
1533 | roles |= FC_RPORT_ROLE_FCP_INITIATOR; | |
1534 | if (fcp_parm & FCP_SPPF_TARG_FCN) | |
1535 | roles |= FC_RPORT_ROLE_FCP_TARGET; | |
f211fa51 | 1536 | rdata->ids.roles = roles; |
42e9a92f RL |
1537 | |
1538 | spp->spp_params = | |
1539 | htonl(lport->service_params); | |
1540 | break; | |
1541 | default: | |
1542 | resp = FC_SPP_RESP_INVL; | |
1543 | break; | |
1544 | } | |
1545 | spp->spp_flags |= resp; | |
1546 | len -= plen; | |
1547 | rspp = (struct fc_els_spp *)((char *)rspp + plen); | |
1548 | spp = (struct fc_els_spp *)((char *)spp + plen); | |
1549 | } | |
1550 | ||
1551 | /* | |
1552 | * Send LS_ACC. If this fails, the originator should retry. | |
1553 | */ | |
1554 | f_ctl = FC_FC_EX_CTX | FC_FC_LAST_SEQ; | |
1555 | f_ctl |= FC_FC_END_SEQ | FC_FC_SEQ_INIT; | |
1556 | ep = fc_seq_exch(sp); | |
1557 | fc_fill_fc_hdr(fp, FC_RCTL_ELS_REP, ep->did, ep->sid, | |
1558 | FC_TYPE_ELS, f_ctl, 0); | |
1559 | lport->tt.seq_send(lport, sp, fp); | |
1560 | ||
1561 | /* | |
1562 | * Get lock and re-check state. | |
1563 | */ | |
1564 | switch (rdata->rp_state) { | |
1565 | case RPORT_ST_PRLI: | |
9fb9d328 | 1566 | fc_rport_enter_ready(rdata); |
42e9a92f RL |
1567 | break; |
1568 | case RPORT_ST_READY: | |
370c3bd0 | 1569 | case RPORT_ST_ADISC: |
42e9a92f RL |
1570 | break; |
1571 | default: | |
1572 | break; | |
1573 | } | |
1574 | } | |
1575 | fc_frame_free(rx_fp); | |
1576 | } | |
1577 | ||
1578 | /** | |
3a3b42bf RL |
1579 | * fc_rport_recv_prlo_req() - Handler for process logout (PRLO) requests |
1580 | * @rdata: The remote port that sent the PRLO request | |
1581 | * @sp: The sequence that the PRLO was on | |
1582 | * @fp: The PRLO request frame | |
42e9a92f RL |
1583 | * |
1584 | * Locking Note: The rport lock is exected to be held before calling | |
1585 | * this function. | |
1586 | */ | |
9fb9d328 JE |
1587 | static void fc_rport_recv_prlo_req(struct fc_rport_priv *rdata, |
1588 | struct fc_seq *sp, | |
42e9a92f RL |
1589 | struct fc_frame *fp) |
1590 | { | |
42e9a92f RL |
1591 | struct fc_lport *lport = rdata->local_port; |
1592 | ||
1593 | struct fc_frame_header *fh; | |
1594 | struct fc_seq_els_data rjt_data; | |
1595 | ||
1596 | fh = fc_frame_header_get(fp); | |
1597 | ||
9fb9d328 JE |
1598 | FC_RPORT_DBG(rdata, "Received PRLO request while in state %s\n", |
1599 | fc_rport_state(rdata)); | |
42e9a92f RL |
1600 | |
1601 | rjt_data.fp = NULL; | |
1602 | rjt_data.reason = ELS_RJT_UNAB; | |
1603 | rjt_data.explan = ELS_EXPL_NONE; | |
1604 | lport->tt.seq_els_rsp_send(sp, ELS_LS_RJT, &rjt_data); | |
1605 | fc_frame_free(fp); | |
1606 | } | |
1607 | ||
1608 | /** | |
3a3b42bf RL |
1609 | * fc_rport_recv_logo_req() - Handler for logout (LOGO) requests |
1610 | * @lport: The local port that received the LOGO request | |
1611 | * @sp: The sequence that the LOGO request was on | |
1612 | * @fp: The LOGO request frame | |
42e9a92f RL |
1613 | * |
1614 | * Locking Note: The rport lock is exected to be held before calling | |
1615 | * this function. | |
1616 | */ | |
83fe6a93 | 1617 | static void fc_rport_recv_logo_req(struct fc_lport *lport, |
9fb9d328 | 1618 | struct fc_seq *sp, |
42e9a92f RL |
1619 | struct fc_frame *fp) |
1620 | { | |
1621 | struct fc_frame_header *fh; | |
83fe6a93 JE |
1622 | struct fc_rport_priv *rdata; |
1623 | u32 sid; | |
42e9a92f | 1624 | |
feab4ae7 JE |
1625 | lport->tt.seq_els_rsp_send(sp, ELS_LS_ACC, NULL); |
1626 | ||
42e9a92f | 1627 | fh = fc_frame_header_get(fp); |
83fe6a93 | 1628 | sid = ntoh24(fh->fh_s_id); |
42e9a92f | 1629 | |
83fe6a93 JE |
1630 | mutex_lock(&lport->disc.disc_mutex); |
1631 | rdata = lport->tt.rport_lookup(lport, sid); | |
1632 | if (rdata) { | |
1633 | mutex_lock(&rdata->rp_mutex); | |
1634 | FC_RPORT_DBG(rdata, "Received LOGO request while in state %s\n", | |
1635 | fc_rport_state(rdata)); | |
feab4ae7 | 1636 | |
b4a9c7ed JE |
1637 | fc_rport_enter_delete(rdata, RPORT_EV_LOGO); |
1638 | ||
feab4ae7 | 1639 | /* |
b4a9c7ed JE |
1640 | * If the remote port was created due to discovery, set state |
1641 | * to log back in. It may have seen a stale RSCN about us. | |
feab4ae7 | 1642 | */ |
b4a9c7ed JE |
1643 | if (rdata->disc_id) |
1644 | fc_rport_state_enter(rdata, RPORT_ST_RESTART); | |
83fe6a93 JE |
1645 | mutex_unlock(&rdata->rp_mutex); |
1646 | } else | |
1647 | FC_RPORT_ID_DBG(lport, sid, | |
1648 | "Received LOGO from non-logged-in port\n"); | |
1649 | mutex_unlock(&lport->disc.disc_mutex); | |
42e9a92f RL |
1650 | fc_frame_free(fp); |
1651 | } | |
1652 | ||
3a3b42bf RL |
1653 | /** |
1654 | * fc_rport_flush_queue() - Flush the rport_event_queue | |
1655 | */ | |
42e9a92f RL |
1656 | static void fc_rport_flush_queue(void) |
1657 | { | |
1658 | flush_workqueue(rport_event_queue); | |
1659 | } | |
1660 | ||
3a3b42bf RL |
1661 | /** |
1662 | * fc_rport_init() - Initialize the remote port layer for a local port | |
1663 | * @lport: The local port to initialize the remote port layer for | |
1664 | */ | |
42e9a92f RL |
1665 | int fc_rport_init(struct fc_lport *lport) |
1666 | { | |
8025b5db JE |
1667 | if (!lport->tt.rport_lookup) |
1668 | lport->tt.rport_lookup = fc_rport_lookup; | |
1669 | ||
5101ff99 | 1670 | if (!lport->tt.rport_create) |
9e9d0452 | 1671 | lport->tt.rport_create = fc_rport_create; |
5101ff99 | 1672 | |
42e9a92f RL |
1673 | if (!lport->tt.rport_login) |
1674 | lport->tt.rport_login = fc_rport_login; | |
1675 | ||
1676 | if (!lport->tt.rport_logoff) | |
1677 | lport->tt.rport_logoff = fc_rport_logoff; | |
1678 | ||
1679 | if (!lport->tt.rport_recv_req) | |
1680 | lport->tt.rport_recv_req = fc_rport_recv_req; | |
1681 | ||
1682 | if (!lport->tt.rport_flush_queue) | |
1683 | lport->tt.rport_flush_queue = fc_rport_flush_queue; | |
1684 | ||
f211fa51 JE |
1685 | if (!lport->tt.rport_destroy) |
1686 | lport->tt.rport_destroy = fc_rport_destroy; | |
1687 | ||
42e9a92f RL |
1688 | return 0; |
1689 | } | |
1690 | EXPORT_SYMBOL(fc_rport_init); | |
1691 | ||
3a3b42bf RL |
1692 | /** |
1693 | * fc_setup_rport() - Initialize the rport_event_queue | |
1694 | */ | |
1695 | int fc_setup_rport() | |
42e9a92f RL |
1696 | { |
1697 | rport_event_queue = create_singlethread_workqueue("fc_rport_eq"); | |
1698 | if (!rport_event_queue) | |
1699 | return -ENOMEM; | |
1700 | return 0; | |
1701 | } | |
42e9a92f | 1702 | |
3a3b42bf RL |
1703 | /** |
1704 | * fc_destroy_rport() - Destroy the rport_event_queue | |
1705 | */ | |
1706 | void fc_destroy_rport() | |
42e9a92f RL |
1707 | { |
1708 | destroy_workqueue(rport_event_queue); | |
1709 | } | |
42e9a92f | 1710 | |
3a3b42bf RL |
1711 | /** |
1712 | * fc_rport_terminate_io() - Stop all outstanding I/O on a remote port | |
1713 | * @rport: The remote port whose I/O should be terminated | |
1714 | */ | |
42e9a92f RL |
1715 | void fc_rport_terminate_io(struct fc_rport *rport) |
1716 | { | |
3a3b42bf RL |
1717 | struct fc_rport_libfc_priv *rpriv = rport->dd_data; |
1718 | struct fc_lport *lport = rpriv->local_port; | |
42e9a92f | 1719 | |
1f6ff364 AJ |
1720 | lport->tt.exch_mgr_reset(lport, 0, rport->port_id); |
1721 | lport->tt.exch_mgr_reset(lport, rport->port_id, 0); | |
42e9a92f RL |
1722 | } |
1723 | EXPORT_SYMBOL(fc_rport_terminate_io); |