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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", |
42e9a92f RL |
92 | }; |
93 | ||
8025b5db | 94 | /** |
3a3b42bf RL |
95 | * fc_rport_lookup() - Lookup a remote port by port_id |
96 | * @lport: The local port to lookup the remote port on | |
97 | * @port_id: The remote port ID to look up | |
8025b5db JE |
98 | */ |
99 | static struct fc_rport_priv *fc_rport_lookup(const struct fc_lport *lport, | |
100 | u32 port_id) | |
101 | { | |
102 | struct fc_rport_priv *rdata; | |
103 | ||
104 | list_for_each_entry(rdata, &lport->disc.rports, peers) | |
b4a9c7ed | 105 | if (rdata->ids.port_id == port_id) |
8025b5db JE |
106 | return rdata; |
107 | return NULL; | |
108 | } | |
109 | ||
9e9d0452 | 110 | /** |
9737e6a7 | 111 | * fc_rport_create() - Create a new remote port |
3a3b42bf RL |
112 | * @lport: The local port this remote port will be associated with |
113 | * @ids: The identifiers for the new remote port | |
114 | * | |
115 | * The remote port will start in the INIT state. | |
9e9d0452 | 116 | * |
48f00902 | 117 | * Locking note: must be called with the disc_mutex held. |
9e9d0452 JE |
118 | */ |
119 | static struct fc_rport_priv *fc_rport_create(struct fc_lport *lport, | |
9737e6a7 | 120 | u32 port_id) |
42e9a92f | 121 | { |
ab28f1fd | 122 | struct fc_rport_priv *rdata; |
42e9a92f | 123 | |
9737e6a7 | 124 | rdata = lport->tt.rport_lookup(lport, port_id); |
19f97e3c JE |
125 | if (rdata) |
126 | return rdata; | |
127 | ||
9e9d0452 JE |
128 | rdata = kzalloc(sizeof(*rdata), GFP_KERNEL); |
129 | if (!rdata) | |
42e9a92f RL |
130 | return NULL; |
131 | ||
9737e6a7 RL |
132 | rdata->ids.node_name = -1; |
133 | rdata->ids.port_name = -1; | |
134 | rdata->ids.port_id = port_id; | |
135 | rdata->ids.roles = FC_RPORT_ROLE_UNKNOWN; | |
136 | ||
f211fa51 | 137 | kref_init(&rdata->kref); |
42e9a92f | 138 | mutex_init(&rdata->rp_mutex); |
795d86f5 | 139 | rdata->local_port = lport; |
42e9a92f RL |
140 | rdata->rp_state = RPORT_ST_INIT; |
141 | rdata->event = RPORT_EV_NONE; | |
142 | rdata->flags = FC_RP_FLAGS_REC_SUPPORTED; | |
795d86f5 JE |
143 | rdata->e_d_tov = lport->e_d_tov; |
144 | rdata->r_a_tov = lport->r_a_tov; | |
f211fa51 | 145 | rdata->maxframe_size = FC_MIN_MAX_PAYLOAD; |
42e9a92f RL |
146 | INIT_DELAYED_WORK(&rdata->retry_work, fc_rport_timeout); |
147 | INIT_WORK(&rdata->event_work, fc_rport_work); | |
9737e6a7 | 148 | if (port_id != FC_FID_DIR_SERV) |
48f00902 | 149 | list_add(&rdata->peers, &lport->disc.rports); |
9fb9d328 | 150 | return rdata; |
42e9a92f RL |
151 | } |
152 | ||
f211fa51 | 153 | /** |
3a3b42bf RL |
154 | * fc_rport_destroy() - Free a remote port after last reference is released |
155 | * @kref: The remote port's kref | |
f211fa51 JE |
156 | */ |
157 | static void fc_rport_destroy(struct kref *kref) | |
158 | { | |
159 | struct fc_rport_priv *rdata; | |
f211fa51 JE |
160 | |
161 | rdata = container_of(kref, struct fc_rport_priv, kref); | |
9e9d0452 | 162 | kfree(rdata); |
f211fa51 JE |
163 | } |
164 | ||
42e9a92f | 165 | /** |
3a3b42bf RL |
166 | * fc_rport_state() - Return a string identifying the remote port's state |
167 | * @rdata: The remote port | |
42e9a92f | 168 | */ |
9fb9d328 | 169 | static const char *fc_rport_state(struct fc_rport_priv *rdata) |
42e9a92f RL |
170 | { |
171 | const char *cp; | |
42e9a92f RL |
172 | |
173 | cp = fc_rport_state_names[rdata->rp_state]; | |
174 | if (!cp) | |
175 | cp = "Unknown"; | |
176 | return cp; | |
177 | } | |
178 | ||
179 | /** | |
3a3b42bf RL |
180 | * fc_set_rport_loss_tmo() - Set the remote port loss timeout |
181 | * @rport: The remote port that gets a new timeout value | |
182 | * @timeout: The new timeout value (in seconds) | |
42e9a92f RL |
183 | */ |
184 | void fc_set_rport_loss_tmo(struct fc_rport *rport, u32 timeout) | |
185 | { | |
186 | if (timeout) | |
187 | rport->dev_loss_tmo = timeout + 5; | |
188 | else | |
189 | rport->dev_loss_tmo = 30; | |
190 | } | |
191 | EXPORT_SYMBOL(fc_set_rport_loss_tmo); | |
192 | ||
193 | /** | |
3a3b42bf RL |
194 | * fc_plogi_get_maxframe() - Get the maximum payload from the common service |
195 | * parameters in a FLOGI frame | |
196 | * @flp: The FLOGI payload | |
197 | * @maxval: The maximum frame size upper limit; this may be less than what | |
198 | * is in the service parameters | |
42e9a92f | 199 | */ |
b2ab99c9 RL |
200 | static unsigned int fc_plogi_get_maxframe(struct fc_els_flogi *flp, |
201 | unsigned int maxval) | |
42e9a92f RL |
202 | { |
203 | unsigned int mfs; | |
204 | ||
205 | /* | |
206 | * Get max payload from the common service parameters and the | |
207 | * class 3 receive data field size. | |
208 | */ | |
209 | mfs = ntohs(flp->fl_csp.sp_bb_data) & FC_SP_BB_DATA_MASK; | |
210 | if (mfs >= FC_SP_MIN_MAX_PAYLOAD && mfs < maxval) | |
211 | maxval = mfs; | |
212 | mfs = ntohs(flp->fl_cssp[3 - 1].cp_rdfs); | |
213 | if (mfs >= FC_SP_MIN_MAX_PAYLOAD && mfs < maxval) | |
214 | maxval = mfs; | |
215 | return maxval; | |
216 | } | |
217 | ||
218 | /** | |
3a3b42bf RL |
219 | * fc_rport_state_enter() - Change the state of a remote port |
220 | * @rdata: The remote port whose state should change | |
221 | * @new: The new state | |
42e9a92f RL |
222 | * |
223 | * Locking Note: Called with the rport lock held | |
224 | */ | |
9fb9d328 | 225 | static void fc_rport_state_enter(struct fc_rport_priv *rdata, |
42e9a92f RL |
226 | enum fc_rport_state new) |
227 | { | |
42e9a92f RL |
228 | if (rdata->rp_state != new) |
229 | rdata->retries = 0; | |
230 | rdata->rp_state = new; | |
231 | } | |
232 | ||
3a3b42bf RL |
233 | /** |
234 | * fc_rport_work() - Handler for remote port events in the rport_event_queue | |
235 | * @work: Handle to the remote port being dequeued | |
236 | */ | |
42e9a92f RL |
237 | static void fc_rport_work(struct work_struct *work) |
238 | { | |
571f824c | 239 | u32 port_id; |
ab28f1fd JE |
240 | struct fc_rport_priv *rdata = |
241 | container_of(work, struct fc_rport_priv, event_work); | |
3a3b42bf | 242 | struct fc_rport_libfc_priv *rpriv; |
42e9a92f | 243 | enum fc_rport_event event; |
42e9a92f RL |
244 | struct fc_lport *lport = rdata->local_port; |
245 | struct fc_rport_operations *rport_ops; | |
629f4427 | 246 | struct fc_rport_identifiers ids; |
f211fa51 | 247 | struct fc_rport *rport; |
42e9a92f RL |
248 | |
249 | mutex_lock(&rdata->rp_mutex); | |
250 | event = rdata->event; | |
251 | rport_ops = rdata->ops; | |
f211fa51 | 252 | rport = rdata->rport; |
42e9a92f | 253 | |
9e9d0452 JE |
254 | FC_RPORT_DBG(rdata, "work event %u\n", event); |
255 | ||
629f4427 | 256 | switch (event) { |
4c0f62b5 | 257 | case RPORT_EV_READY: |
f211fa51 | 258 | ids = rdata->ids; |
5f7ea3b7 | 259 | rdata->event = RPORT_EV_NONE; |
f034260d | 260 | rdata->major_retries = 0; |
9e9d0452 | 261 | kref_get(&rdata->kref); |
42e9a92f RL |
262 | mutex_unlock(&rdata->rp_mutex); |
263 | ||
9e9d0452 JE |
264 | if (!rport) |
265 | rport = fc_remote_port_add(lport->host, 0, &ids); | |
266 | if (!rport) { | |
267 | FC_RPORT_DBG(rdata, "Failed to add the rport\n"); | |
268 | lport->tt.rport_logoff(rdata); | |
269 | kref_put(&rdata->kref, lport->tt.rport_destroy); | |
270 | return; | |
42e9a92f | 271 | } |
9e9d0452 JE |
272 | mutex_lock(&rdata->rp_mutex); |
273 | if (rdata->rport) | |
274 | FC_RPORT_DBG(rdata, "rport already allocated\n"); | |
275 | rdata->rport = rport; | |
276 | rport->maxframe_size = rdata->maxframe_size; | |
277 | rport->supported_classes = rdata->supported_classes; | |
278 | ||
3a3b42bf RL |
279 | rpriv = rport->dd_data; |
280 | rpriv->local_port = lport; | |
281 | rpriv->rp_state = rdata->rp_state; | |
282 | rpriv->flags = rdata->flags; | |
283 | rpriv->e_d_tov = rdata->e_d_tov; | |
284 | rpriv->r_a_tov = rdata->r_a_tov; | |
9e9d0452 JE |
285 | mutex_unlock(&rdata->rp_mutex); |
286 | ||
8345592b | 287 | if (rport_ops && rport_ops->event_callback) { |
9e9d0452 | 288 | FC_RPORT_DBG(rdata, "callback ev %d\n", event); |
9fb9d328 | 289 | rport_ops->event_callback(lport, rdata, event); |
9e9d0452 JE |
290 | } |
291 | kref_put(&rdata->kref, lport->tt.rport_destroy); | |
629f4427 JE |
292 | break; |
293 | ||
294 | case RPORT_EV_FAILED: | |
295 | case RPORT_EV_LOGO: | |
296 | case RPORT_EV_STOP: | |
9e9d0452 | 297 | port_id = rdata->ids.port_id; |
42e9a92f | 298 | mutex_unlock(&rdata->rp_mutex); |
9e9d0452 | 299 | |
8345592b | 300 | if (rport_ops && rport_ops->event_callback) { |
9e9d0452 | 301 | FC_RPORT_DBG(rdata, "callback ev %d\n", event); |
9fb9d328 | 302 | rport_ops->event_callback(lport, rdata, event); |
9e9d0452 | 303 | } |
201e5795 | 304 | cancel_delayed_work_sync(&rdata->retry_work); |
9e9d0452 JE |
305 | |
306 | /* | |
307 | * Reset any outstanding exchanges before freeing rport. | |
308 | */ | |
309 | lport->tt.exch_mgr_reset(lport, 0, port_id); | |
310 | lport->tt.exch_mgr_reset(lport, port_id, 0); | |
311 | ||
312 | if (rport) { | |
3a3b42bf RL |
313 | rpriv = rport->dd_data; |
314 | rpriv->rp_state = RPORT_ST_DELETE; | |
9e9d0452 JE |
315 | mutex_lock(&rdata->rp_mutex); |
316 | rdata->rport = NULL; | |
317 | mutex_unlock(&rdata->rp_mutex); | |
42e9a92f | 318 | fc_remote_port_delete(rport); |
571f824c | 319 | } |
4b2164d4 JE |
320 | |
321 | mutex_lock(&lport->disc.disc_mutex); | |
322 | mutex_lock(&rdata->rp_mutex); | |
323 | if (rdata->rp_state == RPORT_ST_DELETE) { | |
324 | if (port_id == FC_FID_DIR_SERV) { | |
325 | rdata->event = RPORT_EV_NONE; | |
326 | mutex_unlock(&rdata->rp_mutex); | |
f034260d JE |
327 | } else if ((rdata->flags & FC_RP_STARTED) && |
328 | rdata->major_retries < | |
329 | lport->max_rport_retry_count) { | |
330 | rdata->major_retries++; | |
4b2164d4 JE |
331 | rdata->event = RPORT_EV_NONE; |
332 | FC_RPORT_DBG(rdata, "work restart\n"); | |
333 | fc_rport_enter_plogi(rdata); | |
334 | mutex_unlock(&rdata->rp_mutex); | |
335 | } else { | |
336 | FC_RPORT_DBG(rdata, "work delete\n"); | |
337 | list_del(&rdata->peers); | |
338 | mutex_unlock(&rdata->rp_mutex); | |
339 | kref_put(&rdata->kref, lport->tt.rport_destroy); | |
340 | } | |
341 | } else { | |
342 | /* | |
343 | * Re-open for events. Reissue READY event if ready. | |
344 | */ | |
345 | rdata->event = RPORT_EV_NONE; | |
346 | if (rdata->rp_state == RPORT_ST_READY) | |
347 | fc_rport_enter_ready(rdata); | |
b4a9c7ed | 348 | mutex_unlock(&rdata->rp_mutex); |
4b2164d4 JE |
349 | } |
350 | mutex_unlock(&lport->disc.disc_mutex); | |
629f4427 JE |
351 | break; |
352 | ||
353 | default: | |
42e9a92f | 354 | mutex_unlock(&rdata->rp_mutex); |
629f4427 JE |
355 | break; |
356 | } | |
42e9a92f RL |
357 | } |
358 | ||
359 | /** | |
34f42a07 | 360 | * fc_rport_login() - Start the remote port login state machine |
3a3b42bf | 361 | * @rdata: The remote port to be logged in to |
42e9a92f RL |
362 | * |
363 | * Locking Note: Called without the rport lock held. This | |
364 | * function will hold the rport lock, call an _enter_* | |
365 | * function and then unlock the rport. | |
370c3bd0 JE |
366 | * |
367 | * This indicates the intent to be logged into the remote port. | |
368 | * If it appears we are already logged in, ADISC is used to verify | |
369 | * the setup. | |
42e9a92f | 370 | */ |
9fb9d328 | 371 | int fc_rport_login(struct fc_rport_priv *rdata) |
42e9a92f | 372 | { |
42e9a92f RL |
373 | mutex_lock(&rdata->rp_mutex); |
374 | ||
4b2164d4 | 375 | rdata->flags |= FC_RP_STARTED; |
370c3bd0 JE |
376 | switch (rdata->rp_state) { |
377 | case RPORT_ST_READY: | |
378 | FC_RPORT_DBG(rdata, "ADISC port\n"); | |
379 | fc_rport_enter_adisc(rdata); | |
380 | break; | |
b4a9c7ed JE |
381 | case RPORT_ST_DELETE: |
382 | FC_RPORT_DBG(rdata, "Restart deleted port\n"); | |
b4a9c7ed | 383 | break; |
370c3bd0 JE |
384 | default: |
385 | FC_RPORT_DBG(rdata, "Login to port\n"); | |
386 | fc_rport_enter_plogi(rdata); | |
387 | break; | |
388 | } | |
42e9a92f RL |
389 | mutex_unlock(&rdata->rp_mutex); |
390 | ||
391 | return 0; | |
392 | } | |
393 | ||
5f7ea3b7 | 394 | /** |
3a3b42bf RL |
395 | * fc_rport_enter_delete() - Schedule a remote port to be deleted |
396 | * @rdata: The remote port to be deleted | |
397 | * @event: The event to report as the reason for deletion | |
5f7ea3b7 JE |
398 | * |
399 | * Locking Note: Called with the rport lock held. | |
400 | * | |
401 | * Allow state change into DELETE only once. | |
402 | * | |
403 | * Call queue_work only if there's no event already pending. | |
404 | * Set the new event so that the old pending event will not occur. | |
405 | * Since we have the mutex, even if fc_rport_work() is already started, | |
406 | * it'll see the new event. | |
407 | */ | |
9fb9d328 | 408 | static void fc_rport_enter_delete(struct fc_rport_priv *rdata, |
5f7ea3b7 JE |
409 | enum fc_rport_event event) |
410 | { | |
5f7ea3b7 JE |
411 | if (rdata->rp_state == RPORT_ST_DELETE) |
412 | return; | |
413 | ||
9fb9d328 | 414 | FC_RPORT_DBG(rdata, "Delete port\n"); |
5f7ea3b7 | 415 | |
9fb9d328 | 416 | fc_rport_state_enter(rdata, RPORT_ST_DELETE); |
5f7ea3b7 JE |
417 | |
418 | if (rdata->event == RPORT_EV_NONE) | |
419 | queue_work(rport_event_queue, &rdata->event_work); | |
420 | rdata->event = event; | |
421 | } | |
422 | ||
42e9a92f | 423 | /** |
3a3b42bf RL |
424 | * fc_rport_logoff() - Logoff and remove a remote port |
425 | * @rdata: The remote port to be logged off of | |
42e9a92f RL |
426 | * |
427 | * Locking Note: Called without the rport lock held. This | |
428 | * function will hold the rport lock, call an _enter_* | |
429 | * function and then unlock the rport. | |
430 | */ | |
9fb9d328 | 431 | int fc_rport_logoff(struct fc_rport_priv *rdata) |
42e9a92f | 432 | { |
42e9a92f RL |
433 | mutex_lock(&rdata->rp_mutex); |
434 | ||
9fb9d328 | 435 | FC_RPORT_DBG(rdata, "Remove port\n"); |
42e9a92f | 436 | |
4b2164d4 | 437 | rdata->flags &= ~FC_RP_STARTED; |
14194054 | 438 | if (rdata->rp_state == RPORT_ST_DELETE) { |
9fb9d328 | 439 | FC_RPORT_DBG(rdata, "Port in Delete state, not removing\n"); |
b4c6f546 AJ |
440 | goto out; |
441 | } | |
4b2164d4 | 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: |
42e9a92f RL |
506 | break; |
507 | } | |
508 | ||
509 | mutex_unlock(&rdata->rp_mutex); | |
42e9a92f RL |
510 | } |
511 | ||
512 | /** | |
34f42a07 | 513 | * fc_rport_error() - Error handler, called once retries have been exhausted |
3a3b42bf RL |
514 | * @rdata: The remote port the error is happened on |
515 | * @fp: The error code encapsulated in a frame pointer | |
42e9a92f | 516 | * |
42e9a92f RL |
517 | * Locking Note: The rport lock is expected to be held before |
518 | * calling this routine | |
519 | */ | |
9fb9d328 | 520 | static void fc_rport_error(struct fc_rport_priv *rdata, struct fc_frame *fp) |
42e9a92f | 521 | { |
9fb9d328 | 522 | FC_RPORT_DBG(rdata, "Error %ld in state %s, retries %d\n", |
cdbe6dfe JE |
523 | IS_ERR(fp) ? -PTR_ERR(fp) : 0, |
524 | fc_rport_state(rdata), rdata->retries); | |
42e9a92f | 525 | |
6755db1c CL |
526 | switch (rdata->rp_state) { |
527 | case RPORT_ST_PLOGI: | |
6755db1c | 528 | case RPORT_ST_LOGO: |
4b2164d4 | 529 | rdata->flags &= ~FC_RP_STARTED; |
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: |
6755db1c CL |
540 | case RPORT_ST_READY: |
541 | case RPORT_ST_INIT: | |
542 | break; | |
42e9a92f RL |
543 | } |
544 | } | |
545 | ||
6755db1c | 546 | /** |
3a3b42bf RL |
547 | * fc_rport_error_retry() - Handler for remote port state retries |
548 | * @rdata: The remote port whose state is to be retried | |
549 | * @fp: The error code encapsulated in a frame pointer | |
6755db1c CL |
550 | * |
551 | * If the error was an exchange timeout retry immediately, | |
552 | * otherwise wait for E_D_TOV. | |
553 | * | |
554 | * Locking Note: The rport lock is expected to be held before | |
555 | * calling this routine | |
556 | */ | |
9fb9d328 JE |
557 | static void fc_rport_error_retry(struct fc_rport_priv *rdata, |
558 | struct fc_frame *fp) | |
6755db1c | 559 | { |
6755db1c CL |
560 | unsigned long delay = FC_DEF_E_D_TOV; |
561 | ||
562 | /* make sure this isn't an FC_EX_CLOSED error, never retry those */ | |
563 | if (PTR_ERR(fp) == -FC_EX_CLOSED) | |
9fb9d328 | 564 | return fc_rport_error(rdata, fp); |
6755db1c | 565 | |
a3666955 | 566 | if (rdata->retries < rdata->local_port->max_rport_retry_count) { |
9fb9d328 JE |
567 | FC_RPORT_DBG(rdata, "Error %ld in state %s, retrying\n", |
568 | PTR_ERR(fp), fc_rport_state(rdata)); | |
6755db1c CL |
569 | rdata->retries++; |
570 | /* no additional delay on exchange timeouts */ | |
571 | if (PTR_ERR(fp) == -FC_EX_TIMEOUT) | |
572 | delay = 0; | |
6755db1c CL |
573 | schedule_delayed_work(&rdata->retry_work, delay); |
574 | return; | |
575 | } | |
576 | ||
9fb9d328 | 577 | return fc_rport_error(rdata, fp); |
6755db1c CL |
578 | } |
579 | ||
42e9a92f | 580 | /** |
3a3b42bf RL |
581 | * fc_rport_plogi_recv_resp() - Handler for ELS PLOGI responses |
582 | * @sp: The sequence the PLOGI is on | |
583 | * @fp: The PLOGI response frame | |
584 | * @rdata_arg: The remote port that sent the PLOGI response | |
42e9a92f RL |
585 | * |
586 | * Locking Note: This function will be called without the rport lock | |
587 | * held, but it will lock, call an _enter_* function or fc_rport_error | |
588 | * and then unlock the rport. | |
589 | */ | |
590 | static void fc_rport_plogi_resp(struct fc_seq *sp, struct fc_frame *fp, | |
9fb9d328 | 591 | void *rdata_arg) |
42e9a92f | 592 | { |
9fb9d328 | 593 | struct fc_rport_priv *rdata = rdata_arg; |
42e9a92f | 594 | struct fc_lport *lport = rdata->local_port; |
a29e7646 | 595 | struct fc_els_flogi *plp = NULL; |
42e9a92f RL |
596 | unsigned int tov; |
597 | u16 csp_seq; | |
598 | u16 cssp_seq; | |
599 | u8 op; | |
600 | ||
601 | mutex_lock(&rdata->rp_mutex); | |
602 | ||
f657d299 | 603 | FC_RPORT_DBG(rdata, "Received a PLOGI %s\n", fc_els_resp_type(fp)); |
42e9a92f RL |
604 | |
605 | if (rdata->rp_state != RPORT_ST_PLOGI) { | |
9fb9d328 JE |
606 | FC_RPORT_DBG(rdata, "Received a PLOGI response, but in state " |
607 | "%s\n", fc_rport_state(rdata)); | |
76f6804e AJ |
608 | if (IS_ERR(fp)) |
609 | goto err; | |
42e9a92f RL |
610 | goto out; |
611 | } | |
612 | ||
76f6804e | 613 | if (IS_ERR(fp)) { |
9fb9d328 | 614 | fc_rport_error_retry(rdata, fp); |
76f6804e AJ |
615 | goto err; |
616 | } | |
617 | ||
42e9a92f RL |
618 | op = fc_frame_payload_op(fp); |
619 | if (op == ELS_LS_ACC && | |
620 | (plp = fc_frame_payload_get(fp, sizeof(*plp))) != NULL) { | |
f211fa51 JE |
621 | rdata->ids.port_name = get_unaligned_be64(&plp->fl_wwpn); |
622 | rdata->ids.node_name = get_unaligned_be64(&plp->fl_wwnn); | |
42e9a92f RL |
623 | |
624 | tov = ntohl(plp->fl_csp.sp_e_d_tov); | |
625 | if (ntohs(plp->fl_csp.sp_features) & FC_SP_FT_EDTR) | |
3b709150 | 626 | tov /= 1000000; |
42e9a92f RL |
627 | if (tov > rdata->e_d_tov) |
628 | rdata->e_d_tov = tov; | |
629 | csp_seq = ntohs(plp->fl_csp.sp_tot_seq); | |
630 | cssp_seq = ntohs(plp->fl_cssp[3 - 1].cp_con_seq); | |
631 | if (cssp_seq < csp_seq) | |
632 | csp_seq = cssp_seq; | |
633 | rdata->max_seq = csp_seq; | |
f211fa51 | 634 | rdata->maxframe_size = fc_plogi_get_maxframe(plp, lport->mfs); |
3ac6f98f | 635 | fc_rport_enter_prli(rdata); |
42e9a92f | 636 | } else |
9fb9d328 | 637 | fc_rport_error_retry(rdata, fp); |
42e9a92f RL |
638 | |
639 | out: | |
640 | fc_frame_free(fp); | |
641 | err: | |
642 | mutex_unlock(&rdata->rp_mutex); | |
f211fa51 | 643 | kref_put(&rdata->kref, rdata->local_port->tt.rport_destroy); |
42e9a92f RL |
644 | } |
645 | ||
646 | /** | |
3a3b42bf RL |
647 | * fc_rport_enter_plogi() - Send Port Login (PLOGI) request |
648 | * @rdata: The remote port to send a PLOGI to | |
42e9a92f RL |
649 | * |
650 | * Locking Note: The rport lock is expected to be held before calling | |
651 | * this routine. | |
652 | */ | |
9fb9d328 | 653 | static void fc_rport_enter_plogi(struct fc_rport_priv *rdata) |
42e9a92f | 654 | { |
42e9a92f RL |
655 | struct fc_lport *lport = rdata->local_port; |
656 | struct fc_frame *fp; | |
657 | ||
9fb9d328 JE |
658 | FC_RPORT_DBG(rdata, "Port entered PLOGI state from %s state\n", |
659 | fc_rport_state(rdata)); | |
42e9a92f | 660 | |
9fb9d328 | 661 | fc_rport_state_enter(rdata, RPORT_ST_PLOGI); |
42e9a92f | 662 | |
f211fa51 | 663 | rdata->maxframe_size = FC_MIN_MAX_PAYLOAD; |
42e9a92f RL |
664 | fp = fc_frame_alloc(lport, sizeof(struct fc_els_flogi)); |
665 | if (!fp) { | |
9fb9d328 | 666 | fc_rport_error_retry(rdata, fp); |
42e9a92f RL |
667 | return; |
668 | } | |
669 | rdata->e_d_tov = lport->e_d_tov; | |
670 | ||
f211fa51 | 671 | if (!lport->tt.elsct_send(lport, rdata->ids.port_id, fp, ELS_PLOGI, |
b94f8951 JE |
672 | fc_rport_plogi_resp, rdata, |
673 | 2 * lport->r_a_tov)) | |
8f550f93 | 674 | fc_rport_error_retry(rdata, NULL); |
42e9a92f | 675 | else |
f211fa51 | 676 | kref_get(&rdata->kref); |
42e9a92f RL |
677 | } |
678 | ||
679 | /** | |
34f42a07 | 680 | * fc_rport_prli_resp() - Process Login (PRLI) response handler |
3a3b42bf RL |
681 | * @sp: The sequence the PRLI response was on |
682 | * @fp: The PRLI response frame | |
683 | * @rdata_arg: The remote port that sent the PRLI response | |
42e9a92f RL |
684 | * |
685 | * Locking Note: This function will be called without the rport lock | |
686 | * held, but it will lock, call an _enter_* function or fc_rport_error | |
687 | * and then unlock the rport. | |
688 | */ | |
689 | static void fc_rport_prli_resp(struct fc_seq *sp, struct fc_frame *fp, | |
9fb9d328 | 690 | void *rdata_arg) |
42e9a92f | 691 | { |
9fb9d328 | 692 | struct fc_rport_priv *rdata = rdata_arg; |
42e9a92f RL |
693 | struct { |
694 | struct fc_els_prli prli; | |
695 | struct fc_els_spp spp; | |
696 | } *pp; | |
697 | u32 roles = FC_RPORT_ROLE_UNKNOWN; | |
698 | u32 fcp_parm = 0; | |
699 | u8 op; | |
618461c0 | 700 | u8 resp_code = 0; |
42e9a92f RL |
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)); | |
618461c0 BPG |
725 | if (!pp) |
726 | goto out; | |
727 | ||
728 | resp_code = (pp->spp.spp_flags & FC_SPP_RESP_MASK); | |
729 | FC_RPORT_DBG(rdata, "PRLI spp_flags = 0x%x\n", | |
730 | pp->spp.spp_flags); | |
731 | if (resp_code != FC_SPP_RESP_ACK) { | |
732 | if (resp_code == FC_SPP_RESP_CONF) | |
733 | fc_rport_error(rdata, fp); | |
734 | else | |
735 | fc_rport_error_retry(rdata, fp); | |
736 | goto out; | |
42e9a92f | 737 | } |
618461c0 BPG |
738 | if (pp->prli.prli_spp_len < sizeof(pp->spp)) |
739 | goto out; | |
740 | ||
741 | fcp_parm = ntohl(pp->spp.spp_params); | |
742 | if (fcp_parm & FCP_SPPF_RETRY) | |
743 | rdata->flags |= FC_RP_FLAGS_RETRY; | |
42e9a92f | 744 | |
f211fa51 | 745 | rdata->supported_classes = FC_COS_CLASS3; |
42e9a92f RL |
746 | if (fcp_parm & FCP_SPPF_INIT_FCN) |
747 | roles |= FC_RPORT_ROLE_FCP_INITIATOR; | |
748 | if (fcp_parm & FCP_SPPF_TARG_FCN) | |
749 | roles |= FC_RPORT_ROLE_FCP_TARGET; | |
750 | ||
f211fa51 | 751 | rdata->ids.roles = roles; |
9fb9d328 | 752 | fc_rport_enter_rtv(rdata); |
42e9a92f RL |
753 | |
754 | } else { | |
9fb9d328 | 755 | FC_RPORT_DBG(rdata, "Bad ELS response for PRLI command\n"); |
292e40b9 | 756 | fc_rport_error_retry(rdata, fp); |
42e9a92f RL |
757 | } |
758 | ||
759 | out: | |
760 | fc_frame_free(fp); | |
761 | err: | |
762 | mutex_unlock(&rdata->rp_mutex); | |
f211fa51 | 763 | kref_put(&rdata->kref, rdata->local_port->tt.rport_destroy); |
42e9a92f RL |
764 | } |
765 | ||
766 | /** | |
3a3b42bf RL |
767 | * fc_rport_logo_resp() - Handler for logout (LOGO) responses |
768 | * @sp: The sequence the LOGO was on | |
769 | * @fp: The LOGO response frame | |
770 | * @rdata_arg: The remote port that sent the LOGO response | |
42e9a92f RL |
771 | * |
772 | * Locking Note: This function will be called without the rport lock | |
773 | * held, but it will lock, call an _enter_* function or fc_rport_error | |
774 | * and then unlock the rport. | |
775 | */ | |
776 | static void fc_rport_logo_resp(struct fc_seq *sp, struct fc_frame *fp, | |
9fb9d328 | 777 | void *rdata_arg) |
42e9a92f | 778 | { |
9fb9d328 | 779 | struct fc_rport_priv *rdata = rdata_arg; |
42e9a92f RL |
780 | u8 op; |
781 | ||
782 | mutex_lock(&rdata->rp_mutex); | |
783 | ||
f657d299 | 784 | FC_RPORT_DBG(rdata, "Received a LOGO %s\n", fc_els_resp_type(fp)); |
42e9a92f | 785 | |
42e9a92f | 786 | if (rdata->rp_state != RPORT_ST_LOGO) { |
9fb9d328 JE |
787 | FC_RPORT_DBG(rdata, "Received a LOGO response, but in state " |
788 | "%s\n", fc_rport_state(rdata)); | |
76f6804e AJ |
789 | if (IS_ERR(fp)) |
790 | goto err; | |
42e9a92f RL |
791 | goto out; |
792 | } | |
793 | ||
76f6804e | 794 | if (IS_ERR(fp)) { |
9fb9d328 | 795 | fc_rport_error_retry(rdata, fp); |
76f6804e AJ |
796 | goto err; |
797 | } | |
798 | ||
42e9a92f | 799 | op = fc_frame_payload_op(fp); |
68a1750b JE |
800 | if (op != ELS_LS_ACC) |
801 | FC_RPORT_DBG(rdata, "Bad ELS response op %x for LOGO command\n", | |
802 | op); | |
803 | fc_rport_enter_delete(rdata, RPORT_EV_LOGO); | |
42e9a92f RL |
804 | |
805 | out: | |
806 | fc_frame_free(fp); | |
807 | err: | |
808 | mutex_unlock(&rdata->rp_mutex); | |
f211fa51 | 809 | kref_put(&rdata->kref, rdata->local_port->tt.rport_destroy); |
42e9a92f RL |
810 | } |
811 | ||
812 | /** | |
3a3b42bf RL |
813 | * fc_rport_enter_prli() - Send Process Login (PRLI) request |
814 | * @rdata: The remote port to send the PRLI request to | |
42e9a92f RL |
815 | * |
816 | * Locking Note: The rport lock is expected to be held before calling | |
817 | * this routine. | |
818 | */ | |
9fb9d328 | 819 | static void fc_rport_enter_prli(struct fc_rport_priv *rdata) |
42e9a92f | 820 | { |
42e9a92f RL |
821 | struct fc_lport *lport = rdata->local_port; |
822 | struct { | |
823 | struct fc_els_prli prli; | |
824 | struct fc_els_spp spp; | |
825 | } *pp; | |
826 | struct fc_frame *fp; | |
827 | ||
3ac6f98f JE |
828 | /* |
829 | * If the rport is one of the well known addresses | |
830 | * we skip PRLI and RTV and go straight to READY. | |
831 | */ | |
832 | if (rdata->ids.port_id >= FC_FID_DOM_MGR) { | |
833 | fc_rport_enter_ready(rdata); | |
834 | return; | |
835 | } | |
836 | ||
9fb9d328 JE |
837 | FC_RPORT_DBG(rdata, "Port entered PRLI state from %s state\n", |
838 | fc_rport_state(rdata)); | |
42e9a92f | 839 | |
9fb9d328 | 840 | fc_rport_state_enter(rdata, RPORT_ST_PRLI); |
42e9a92f RL |
841 | |
842 | fp = fc_frame_alloc(lport, sizeof(*pp)); | |
843 | if (!fp) { | |
9fb9d328 | 844 | fc_rport_error_retry(rdata, fp); |
42e9a92f RL |
845 | return; |
846 | } | |
847 | ||
f211fa51 | 848 | if (!lport->tt.elsct_send(lport, rdata->ids.port_id, fp, ELS_PRLI, |
b94f8951 JE |
849 | fc_rport_prli_resp, rdata, |
850 | 2 * lport->r_a_tov)) | |
8f550f93 | 851 | fc_rport_error_retry(rdata, NULL); |
42e9a92f | 852 | else |
f211fa51 | 853 | kref_get(&rdata->kref); |
42e9a92f RL |
854 | } |
855 | ||
856 | /** | |
3a3b42bf RL |
857 | * fc_rport_els_rtv_resp() - Handler for Request Timeout Value (RTV) responses |
858 | * @sp: The sequence the RTV was on | |
859 | * @fp: The RTV response frame | |
860 | * @rdata_arg: The remote port that sent the RTV response | |
42e9a92f RL |
861 | * |
862 | * Many targets don't seem to support this. | |
863 | * | |
864 | * Locking Note: This function will be called without the rport lock | |
865 | * held, but it will lock, call an _enter_* function or fc_rport_error | |
866 | * and then unlock the rport. | |
867 | */ | |
868 | static void fc_rport_rtv_resp(struct fc_seq *sp, struct fc_frame *fp, | |
9fb9d328 | 869 | void *rdata_arg) |
42e9a92f | 870 | { |
9fb9d328 | 871 | struct fc_rport_priv *rdata = rdata_arg; |
42e9a92f RL |
872 | u8 op; |
873 | ||
874 | mutex_lock(&rdata->rp_mutex); | |
875 | ||
f657d299 | 876 | FC_RPORT_DBG(rdata, "Received a RTV %s\n", fc_els_resp_type(fp)); |
42e9a92f RL |
877 | |
878 | if (rdata->rp_state != RPORT_ST_RTV) { | |
9fb9d328 JE |
879 | FC_RPORT_DBG(rdata, "Received a RTV response, but in state " |
880 | "%s\n", fc_rport_state(rdata)); | |
76f6804e AJ |
881 | if (IS_ERR(fp)) |
882 | goto err; | |
42e9a92f RL |
883 | goto out; |
884 | } | |
885 | ||
76f6804e | 886 | if (IS_ERR(fp)) { |
9fb9d328 | 887 | fc_rport_error(rdata, fp); |
76f6804e AJ |
888 | goto err; |
889 | } | |
890 | ||
42e9a92f RL |
891 | op = fc_frame_payload_op(fp); |
892 | if (op == ELS_LS_ACC) { | |
893 | struct fc_els_rtv_acc *rtv; | |
894 | u32 toq; | |
895 | u32 tov; | |
896 | ||
897 | rtv = fc_frame_payload_get(fp, sizeof(*rtv)); | |
898 | if (rtv) { | |
899 | toq = ntohl(rtv->rtv_toq); | |
900 | tov = ntohl(rtv->rtv_r_a_tov); | |
901 | if (tov == 0) | |
902 | tov = 1; | |
903 | rdata->r_a_tov = tov; | |
904 | tov = ntohl(rtv->rtv_e_d_tov); | |
905 | if (toq & FC_ELS_RTV_EDRES) | |
906 | tov /= 1000000; | |
907 | if (tov == 0) | |
908 | tov = 1; | |
909 | rdata->e_d_tov = tov; | |
910 | } | |
911 | } | |
912 | ||
9fb9d328 | 913 | fc_rport_enter_ready(rdata); |
42e9a92f RL |
914 | |
915 | out: | |
916 | fc_frame_free(fp); | |
917 | err: | |
918 | mutex_unlock(&rdata->rp_mutex); | |
f211fa51 | 919 | kref_put(&rdata->kref, rdata->local_port->tt.rport_destroy); |
42e9a92f RL |
920 | } |
921 | ||
922 | /** | |
3a3b42bf RL |
923 | * fc_rport_enter_rtv() - Send Request Timeout Value (RTV) request |
924 | * @rdata: The remote port to send the RTV request to | |
42e9a92f RL |
925 | * |
926 | * Locking Note: The rport lock is expected to be held before calling | |
927 | * this routine. | |
928 | */ | |
9fb9d328 | 929 | static void fc_rport_enter_rtv(struct fc_rport_priv *rdata) |
42e9a92f RL |
930 | { |
931 | struct fc_frame *fp; | |
42e9a92f RL |
932 | struct fc_lport *lport = rdata->local_port; |
933 | ||
9fb9d328 JE |
934 | FC_RPORT_DBG(rdata, "Port entered RTV state from %s state\n", |
935 | fc_rport_state(rdata)); | |
42e9a92f | 936 | |
9fb9d328 | 937 | fc_rport_state_enter(rdata, RPORT_ST_RTV); |
42e9a92f RL |
938 | |
939 | fp = fc_frame_alloc(lport, sizeof(struct fc_els_rtv)); | |
940 | if (!fp) { | |
9fb9d328 | 941 | fc_rport_error_retry(rdata, fp); |
42e9a92f RL |
942 | return; |
943 | } | |
944 | ||
f211fa51 | 945 | if (!lport->tt.elsct_send(lport, rdata->ids.port_id, fp, ELS_RTV, |
b94f8951 JE |
946 | fc_rport_rtv_resp, rdata, |
947 | 2 * lport->r_a_tov)) | |
8f550f93 | 948 | fc_rport_error_retry(rdata, NULL); |
42e9a92f | 949 | else |
f211fa51 | 950 | kref_get(&rdata->kref); |
42e9a92f RL |
951 | } |
952 | ||
953 | /** | |
3a3b42bf RL |
954 | * fc_rport_enter_logo() - Send a logout (LOGO) request |
955 | * @rdata: The remote port to send the LOGO request to | |
42e9a92f RL |
956 | * |
957 | * Locking Note: The rport lock is expected to be held before calling | |
958 | * this routine. | |
959 | */ | |
9fb9d328 | 960 | static void fc_rport_enter_logo(struct fc_rport_priv *rdata) |
42e9a92f | 961 | { |
42e9a92f RL |
962 | struct fc_lport *lport = rdata->local_port; |
963 | struct fc_frame *fp; | |
964 | ||
9fb9d328 JE |
965 | FC_RPORT_DBG(rdata, "Port entered LOGO state from %s state\n", |
966 | fc_rport_state(rdata)); | |
42e9a92f | 967 | |
9fb9d328 | 968 | fc_rport_state_enter(rdata, RPORT_ST_LOGO); |
42e9a92f RL |
969 | |
970 | fp = fc_frame_alloc(lport, sizeof(struct fc_els_logo)); | |
971 | if (!fp) { | |
9fb9d328 | 972 | fc_rport_error_retry(rdata, fp); |
42e9a92f RL |
973 | return; |
974 | } | |
975 | ||
f211fa51 | 976 | if (!lport->tt.elsct_send(lport, rdata->ids.port_id, fp, ELS_LOGO, |
b94f8951 JE |
977 | fc_rport_logo_resp, rdata, |
978 | 2 * lport->r_a_tov)) | |
8f550f93 | 979 | fc_rport_error_retry(rdata, NULL); |
42e9a92f | 980 | else |
f211fa51 | 981 | kref_get(&rdata->kref); |
42e9a92f RL |
982 | } |
983 | ||
370c3bd0 | 984 | /** |
3a3b42bf RL |
985 | * fc_rport_els_adisc_resp() - Handler for Address Discovery (ADISC) responses |
986 | * @sp: The sequence the ADISC response was on | |
987 | * @fp: The ADISC response frame | |
988 | * @rdata_arg: The remote port that sent the ADISC response | |
370c3bd0 JE |
989 | * |
990 | * Locking Note: This function will be called without the rport lock | |
991 | * held, but it will lock, call an _enter_* function or fc_rport_error | |
992 | * and then unlock the rport. | |
993 | */ | |
994 | static void fc_rport_adisc_resp(struct fc_seq *sp, struct fc_frame *fp, | |
3a3b42bf | 995 | void *rdata_arg) |
370c3bd0 JE |
996 | { |
997 | struct fc_rport_priv *rdata = rdata_arg; | |
998 | struct fc_els_adisc *adisc; | |
999 | u8 op; | |
1000 | ||
1001 | mutex_lock(&rdata->rp_mutex); | |
1002 | ||
1003 | FC_RPORT_DBG(rdata, "Received a ADISC response\n"); | |
1004 | ||
1005 | if (rdata->rp_state != RPORT_ST_ADISC) { | |
1006 | FC_RPORT_DBG(rdata, "Received a ADISC resp but in state %s\n", | |
1007 | fc_rport_state(rdata)); | |
1008 | if (IS_ERR(fp)) | |
1009 | goto err; | |
1010 | goto out; | |
1011 | } | |
1012 | ||
1013 | if (IS_ERR(fp)) { | |
1014 | fc_rport_error(rdata, fp); | |
1015 | goto err; | |
1016 | } | |
1017 | ||
1018 | /* | |
1019 | * If address verification failed. Consider us logged out of the rport. | |
1020 | * Since the rport is still in discovery, we want to be | |
1021 | * logged in, so go to PLOGI state. Otherwise, go back to READY. | |
1022 | */ | |
1023 | op = fc_frame_payload_op(fp); | |
1024 | adisc = fc_frame_payload_get(fp, sizeof(*adisc)); | |
1025 | if (op != ELS_LS_ACC || !adisc || | |
1026 | ntoh24(adisc->adisc_port_id) != rdata->ids.port_id || | |
1027 | get_unaligned_be64(&adisc->adisc_wwpn) != rdata->ids.port_name || | |
1028 | get_unaligned_be64(&adisc->adisc_wwnn) != rdata->ids.node_name) { | |
1029 | FC_RPORT_DBG(rdata, "ADISC error or mismatch\n"); | |
1030 | fc_rport_enter_plogi(rdata); | |
1031 | } else { | |
1032 | FC_RPORT_DBG(rdata, "ADISC OK\n"); | |
1033 | fc_rport_enter_ready(rdata); | |
1034 | } | |
1035 | out: | |
1036 | fc_frame_free(fp); | |
1037 | err: | |
1038 | mutex_unlock(&rdata->rp_mutex); | |
1039 | kref_put(&rdata->kref, rdata->local_port->tt.rport_destroy); | |
1040 | } | |
1041 | ||
1042 | /** | |
3a3b42bf RL |
1043 | * fc_rport_enter_adisc() - Send Address Discover (ADISC) request |
1044 | * @rdata: The remote port to send the ADISC request to | |
370c3bd0 JE |
1045 | * |
1046 | * Locking Note: The rport lock is expected to be held before calling | |
1047 | * this routine. | |
1048 | */ | |
1049 | static void fc_rport_enter_adisc(struct fc_rport_priv *rdata) | |
1050 | { | |
1051 | struct fc_lport *lport = rdata->local_port; | |
1052 | struct fc_frame *fp; | |
1053 | ||
1054 | FC_RPORT_DBG(rdata, "sending ADISC from %s state\n", | |
1055 | fc_rport_state(rdata)); | |
1056 | ||
1057 | fc_rport_state_enter(rdata, RPORT_ST_ADISC); | |
1058 | ||
1059 | fp = fc_frame_alloc(lport, sizeof(struct fc_els_adisc)); | |
1060 | if (!fp) { | |
1061 | fc_rport_error_retry(rdata, fp); | |
1062 | return; | |
1063 | } | |
1064 | if (!lport->tt.elsct_send(lport, rdata->ids.port_id, fp, ELS_ADISC, | |
b94f8951 JE |
1065 | fc_rport_adisc_resp, rdata, |
1066 | 2 * lport->r_a_tov)) | |
8f550f93 | 1067 | fc_rport_error_retry(rdata, NULL); |
370c3bd0 JE |
1068 | else |
1069 | kref_get(&rdata->kref); | |
1070 | } | |
1071 | ||
8abbe3a4 | 1072 | /** |
3a3b42bf RL |
1073 | * fc_rport_recv_adisc_req() - Handler for Address Discovery (ADISC) requests |
1074 | * @rdata: The remote port that sent the ADISC request | |
1075 | * @sp: The sequence the ADISC request was on | |
1076 | * @in_fp: The ADISC request frame | |
8abbe3a4 JE |
1077 | * |
1078 | * Locking Note: Called with the lport and rport locks held. | |
1079 | */ | |
1080 | static void fc_rport_recv_adisc_req(struct fc_rport_priv *rdata, | |
1081 | struct fc_seq *sp, struct fc_frame *in_fp) | |
1082 | { | |
1083 | struct fc_lport *lport = rdata->local_port; | |
1084 | struct fc_frame *fp; | |
1085 | struct fc_exch *ep = fc_seq_exch(sp); | |
1086 | struct fc_els_adisc *adisc; | |
1087 | struct fc_seq_els_data rjt_data; | |
1088 | u32 f_ctl; | |
1089 | ||
1090 | FC_RPORT_DBG(rdata, "Received ADISC request\n"); | |
1091 | ||
1092 | adisc = fc_frame_payload_get(in_fp, sizeof(*adisc)); | |
1093 | if (!adisc) { | |
1094 | rjt_data.fp = NULL; | |
1095 | rjt_data.reason = ELS_RJT_PROT; | |
1096 | rjt_data.explan = ELS_EXPL_INV_LEN; | |
1097 | lport->tt.seq_els_rsp_send(sp, ELS_LS_RJT, &rjt_data); | |
1098 | goto drop; | |
1099 | } | |
1100 | ||
1101 | fp = fc_frame_alloc(lport, sizeof(*adisc)); | |
1102 | if (!fp) | |
1103 | goto drop; | |
1104 | fc_adisc_fill(lport, fp); | |
1105 | adisc = fc_frame_payload_get(fp, sizeof(*adisc)); | |
1106 | adisc->adisc_cmd = ELS_LS_ACC; | |
1107 | sp = lport->tt.seq_start_next(sp); | |
1108 | f_ctl = FC_FC_EX_CTX | FC_FC_LAST_SEQ | FC_FC_END_SEQ | FC_FC_SEQ_INIT; | |
1109 | fc_fill_fc_hdr(fp, FC_RCTL_ELS_REP, ep->did, ep->sid, | |
1110 | FC_TYPE_ELS, f_ctl, 0); | |
1111 | lport->tt.seq_send(lport, sp, fp); | |
1112 | drop: | |
1113 | fc_frame_free(in_fp); | |
1114 | } | |
1115 | ||
63e27fb8 YZ |
1116 | /** |
1117 | * fc_rport_recv_rls_req() - Handle received Read Link Status request | |
1118 | * @rdata: The remote port that sent the RLS request | |
1119 | * @sp: The sequence that the RLS was on | |
1120 | * @rx_fp: The PRLI request frame | |
1121 | * | |
1122 | * Locking Note: The rport lock is expected to be held before calling | |
1123 | * this function. | |
1124 | */ | |
1125 | static void fc_rport_recv_rls_req(struct fc_rport_priv *rdata, | |
1126 | struct fc_seq *sp, struct fc_frame *rx_fp) | |
1127 | ||
1128 | { | |
1129 | struct fc_lport *lport = rdata->local_port; | |
1130 | struct fc_frame *fp; | |
1131 | struct fc_exch *ep = fc_seq_exch(sp); | |
1132 | struct fc_els_rls *rls; | |
1133 | struct fc_els_rls_resp *rsp; | |
1134 | struct fc_els_lesb *lesb; | |
1135 | struct fc_seq_els_data rjt_data; | |
1136 | struct fc_host_statistics *hst; | |
1137 | u32 f_ctl; | |
1138 | ||
1139 | FC_RPORT_DBG(rdata, "Received RLS request while in state %s\n", | |
1140 | fc_rport_state(rdata)); | |
1141 | ||
1142 | rls = fc_frame_payload_get(rx_fp, sizeof(*rls)); | |
1143 | if (!rls) { | |
1144 | rjt_data.reason = ELS_RJT_PROT; | |
1145 | rjt_data.explan = ELS_EXPL_INV_LEN; | |
1146 | goto out_rjt; | |
1147 | } | |
1148 | ||
1149 | fp = fc_frame_alloc(lport, sizeof(*rsp)); | |
1150 | if (!fp) { | |
1151 | rjt_data.reason = ELS_RJT_UNAB; | |
1152 | rjt_data.explan = ELS_EXPL_INSUF_RES; | |
1153 | goto out_rjt; | |
1154 | } | |
1155 | ||
1156 | rsp = fc_frame_payload_get(fp, sizeof(*rsp)); | |
1157 | memset(rsp, 0, sizeof(*rsp)); | |
1158 | rsp->rls_cmd = ELS_LS_ACC; | |
1159 | lesb = &rsp->rls_lesb; | |
1160 | if (lport->tt.get_lesb) { | |
1161 | /* get LESB from LLD if it supports it */ | |
1162 | lport->tt.get_lesb(lport, lesb); | |
1163 | } else { | |
1164 | fc_get_host_stats(lport->host); | |
1165 | hst = &lport->host_stats; | |
1166 | lesb->lesb_link_fail = htonl(hst->link_failure_count); | |
1167 | lesb->lesb_sync_loss = htonl(hst->loss_of_sync_count); | |
1168 | lesb->lesb_sig_loss = htonl(hst->loss_of_signal_count); | |
1169 | lesb->lesb_prim_err = htonl(hst->prim_seq_protocol_err_count); | |
1170 | lesb->lesb_inv_word = htonl(hst->invalid_tx_word_count); | |
1171 | lesb->lesb_inv_crc = htonl(hst->invalid_crc_count); | |
1172 | } | |
1173 | ||
1174 | sp = lport->tt.seq_start_next(sp); | |
1175 | f_ctl = FC_FC_EX_CTX | FC_FC_LAST_SEQ | FC_FC_END_SEQ; | |
1176 | fc_fill_fc_hdr(fp, FC_RCTL_ELS_REP, ep->did, ep->sid, | |
1177 | FC_TYPE_ELS, f_ctl, 0); | |
1178 | lport->tt.seq_send(lport, sp, fp); | |
1179 | goto out; | |
1180 | ||
1181 | out_rjt: | |
1182 | rjt_data.fp = NULL; | |
1183 | lport->tt.seq_els_rsp_send(sp, ELS_LS_RJT, &rjt_data); | |
1184 | out: | |
1185 | fc_frame_free(rx_fp); | |
1186 | } | |
1187 | ||
42e9a92f | 1188 | /** |
3a3b42bf RL |
1189 | * fc_rport_recv_els_req() - Handler for validated ELS requests |
1190 | * @lport: The local port that received the ELS request | |
1191 | * @sp: The sequence that the ELS request was on | |
1192 | * @fp: The ELS request frame | |
83fe6a93 JE |
1193 | * |
1194 | * Handle incoming ELS requests that require port login. | |
1195 | * The ELS opcode has already been validated by the caller. | |
42e9a92f | 1196 | * |
131203a1 | 1197 | * Locking Note: Called with the lport lock held. |
42e9a92f | 1198 | */ |
83fe6a93 JE |
1199 | static void fc_rport_recv_els_req(struct fc_lport *lport, |
1200 | struct fc_seq *sp, struct fc_frame *fp) | |
42e9a92f | 1201 | { |
131203a1 | 1202 | struct fc_rport_priv *rdata; |
42e9a92f RL |
1203 | struct fc_frame_header *fh; |
1204 | struct fc_seq_els_data els_data; | |
42e9a92f | 1205 | |
42e9a92f | 1206 | els_data.fp = NULL; |
83fe6a93 JE |
1207 | els_data.reason = ELS_RJT_UNAB; |
1208 | els_data.explan = ELS_EXPL_PLOGI_REQD; | |
3ac6f98f | 1209 | |
42e9a92f RL |
1210 | fh = fc_frame_header_get(fp); |
1211 | ||
25b37b98 | 1212 | mutex_lock(&lport->disc.disc_mutex); |
83fe6a93 | 1213 | rdata = lport->tt.rport_lookup(lport, ntoh24(fh->fh_s_id)); |
131203a1 | 1214 | if (!rdata) { |
25b37b98 | 1215 | mutex_unlock(&lport->disc.disc_mutex); |
83fe6a93 | 1216 | goto reject; |
131203a1 JE |
1217 | } |
1218 | mutex_lock(&rdata->rp_mutex); | |
25b37b98 | 1219 | mutex_unlock(&lport->disc.disc_mutex); |
131203a1 | 1220 | |
83fe6a93 JE |
1221 | switch (rdata->rp_state) { |
1222 | case RPORT_ST_PRLI: | |
1223 | case RPORT_ST_RTV: | |
1224 | case RPORT_ST_READY: | |
370c3bd0 | 1225 | case RPORT_ST_ADISC: |
83fe6a93 JE |
1226 | break; |
1227 | default: | |
1228 | mutex_unlock(&rdata->rp_mutex); | |
1229 | goto reject; | |
1230 | } | |
1231 | ||
1232 | switch (fc_frame_payload_op(fp)) { | |
131203a1 JE |
1233 | case ELS_PRLI: |
1234 | fc_rport_recv_prli_req(rdata, sp, fp); | |
1235 | break; | |
1236 | case ELS_PRLO: | |
1237 | fc_rport_recv_prlo_req(rdata, sp, fp); | |
1238 | break; | |
8abbe3a4 JE |
1239 | case ELS_ADISC: |
1240 | fc_rport_recv_adisc_req(rdata, sp, fp); | |
1241 | break; | |
131203a1 JE |
1242 | case ELS_RRQ: |
1243 | els_data.fp = fp; | |
1244 | lport->tt.seq_els_rsp_send(sp, ELS_RRQ, &els_data); | |
1245 | break; | |
1246 | case ELS_REC: | |
1247 | els_data.fp = fp; | |
1248 | lport->tt.seq_els_rsp_send(sp, ELS_REC, &els_data); | |
1249 | break; | |
63e27fb8 YZ |
1250 | case ELS_RLS: |
1251 | fc_rport_recv_rls_req(rdata, sp, fp); | |
1252 | break; | |
131203a1 | 1253 | default: |
83fe6a93 | 1254 | fc_frame_free(fp); /* can't happen */ |
131203a1 | 1255 | break; |
42e9a92f RL |
1256 | } |
1257 | ||
1258 | mutex_unlock(&rdata->rp_mutex); | |
83fe6a93 JE |
1259 | return; |
1260 | ||
1261 | reject: | |
1262 | lport->tt.seq_els_rsp_send(sp, ELS_LS_RJT, &els_data); | |
1263 | fc_frame_free(fp); | |
1264 | } | |
1265 | ||
1266 | /** | |
3a3b42bf RL |
1267 | * fc_rport_recv_req() - Handler for requests |
1268 | * @sp: The sequence the request was on | |
1269 | * @fp: The request frame | |
1270 | * @lport: The local port that received the request | |
83fe6a93 JE |
1271 | * |
1272 | * Locking Note: Called with the lport lock held. | |
1273 | */ | |
1274 | void fc_rport_recv_req(struct fc_seq *sp, struct fc_frame *fp, | |
1275 | struct fc_lport *lport) | |
1276 | { | |
1277 | struct fc_seq_els_data els_data; | |
1278 | ||
1279 | /* | |
1280 | * Handle PLOGI and LOGO requests separately, since they | |
1281 | * don't require prior login. | |
1282 | * Check for unsupported opcodes first and reject them. | |
1283 | * For some ops, it would be incorrect to reject with "PLOGI required". | |
1284 | */ | |
1285 | switch (fc_frame_payload_op(fp)) { | |
1286 | case ELS_PLOGI: | |
1287 | fc_rport_recv_plogi_req(lport, sp, fp); | |
1288 | break; | |
1289 | case ELS_LOGO: | |
1290 | fc_rport_recv_logo_req(lport, sp, fp); | |
1291 | break; | |
1292 | case ELS_PRLI: | |
1293 | case ELS_PRLO: | |
8abbe3a4 | 1294 | case ELS_ADISC: |
83fe6a93 JE |
1295 | case ELS_RRQ: |
1296 | case ELS_REC: | |
63e27fb8 | 1297 | case ELS_RLS: |
83fe6a93 JE |
1298 | fc_rport_recv_els_req(lport, sp, fp); |
1299 | break; | |
1300 | default: | |
1301 | fc_frame_free(fp); | |
1302 | els_data.fp = NULL; | |
1303 | els_data.reason = ELS_RJT_UNSUP; | |
1304 | els_data.explan = ELS_EXPL_NONE; | |
1305 | lport->tt.seq_els_rsp_send(sp, ELS_LS_RJT, &els_data); | |
1306 | break; | |
1307 | } | |
42e9a92f RL |
1308 | } |
1309 | ||
1310 | /** | |
3a3b42bf RL |
1311 | * fc_rport_recv_plogi_req() - Handler for Port Login (PLOGI) requests |
1312 | * @lport: The local port that received the PLOGI request | |
1313 | * @sp: The sequence that the PLOGI request was on | |
1314 | * @rx_fp: The PLOGI request frame | |
42e9a92f | 1315 | * |
3ac6f98f | 1316 | * Locking Note: The rport lock is held before calling this function. |
42e9a92f | 1317 | */ |
3ac6f98f | 1318 | static void fc_rport_recv_plogi_req(struct fc_lport *lport, |
42e9a92f RL |
1319 | struct fc_seq *sp, struct fc_frame *rx_fp) |
1320 | { | |
3ac6f98f JE |
1321 | struct fc_disc *disc; |
1322 | struct fc_rport_priv *rdata; | |
42e9a92f RL |
1323 | struct fc_frame *fp = rx_fp; |
1324 | struct fc_exch *ep; | |
1325 | struct fc_frame_header *fh; | |
1326 | struct fc_els_flogi *pl; | |
1327 | struct fc_seq_els_data rjt_data; | |
3ac6f98f | 1328 | u32 sid, f_ctl; |
42e9a92f | 1329 | |
3ac6f98f | 1330 | rjt_data.fp = NULL; |
42e9a92f | 1331 | fh = fc_frame_header_get(fp); |
3ac6f98f | 1332 | sid = ntoh24(fh->fh_s_id); |
42e9a92f | 1333 | |
3ac6f98f | 1334 | FC_RPORT_ID_DBG(lport, sid, "Received PLOGI request\n"); |
42e9a92f | 1335 | |
42e9a92f RL |
1336 | pl = fc_frame_payload_get(fp, sizeof(*pl)); |
1337 | if (!pl) { | |
3ac6f98f JE |
1338 | FC_RPORT_ID_DBG(lport, sid, "Received PLOGI too short\n"); |
1339 | rjt_data.reason = ELS_RJT_PROT; | |
1340 | rjt_data.explan = ELS_EXPL_INV_LEN; | |
1341 | goto reject; | |
42e9a92f | 1342 | } |
3ac6f98f JE |
1343 | |
1344 | disc = &lport->disc; | |
1345 | mutex_lock(&disc->disc_mutex); | |
1346 | rdata = lport->tt.rport_create(lport, sid); | |
1347 | if (!rdata) { | |
1348 | mutex_unlock(&disc->disc_mutex); | |
1349 | rjt_data.reason = ELS_RJT_UNAB; | |
1350 | rjt_data.explan = ELS_EXPL_INSUF_RES; | |
1351 | goto reject; | |
1352 | } | |
1353 | ||
1354 | mutex_lock(&rdata->rp_mutex); | |
1355 | mutex_unlock(&disc->disc_mutex); | |
1356 | ||
1357 | rdata->ids.port_name = get_unaligned_be64(&pl->fl_wwpn); | |
1358 | rdata->ids.node_name = get_unaligned_be64(&pl->fl_wwnn); | |
42e9a92f RL |
1359 | |
1360 | /* | |
3ac6f98f | 1361 | * If the rport was just created, possibly due to the incoming PLOGI, |
42e9a92f RL |
1362 | * set the state appropriately and accept the PLOGI. |
1363 | * | |
1364 | * If we had also sent a PLOGI, and if the received PLOGI is from a | |
1365 | * higher WWPN, we accept it, otherwise an LS_RJT is sent with reason | |
1366 | * "command already in progress". | |
1367 | * | |
1368 | * XXX TBD: If the session was ready before, the PLOGI should result in | |
1369 | * all outstanding exchanges being reset. | |
1370 | */ | |
1371 | switch (rdata->rp_state) { | |
1372 | case RPORT_ST_INIT: | |
3ac6f98f | 1373 | FC_RPORT_DBG(rdata, "Received PLOGI in INIT state\n"); |
42e9a92f RL |
1374 | break; |
1375 | case RPORT_ST_PLOGI: | |
3ac6f98f JE |
1376 | FC_RPORT_DBG(rdata, "Received PLOGI in PLOGI state\n"); |
1377 | if (rdata->ids.port_name < lport->wwpn) { | |
1378 | mutex_unlock(&rdata->rp_mutex); | |
1379 | rjt_data.reason = ELS_RJT_INPROG; | |
1380 | rjt_data.explan = ELS_EXPL_NONE; | |
1381 | goto reject; | |
1382 | } | |
42e9a92f RL |
1383 | break; |
1384 | case RPORT_ST_PRLI: | |
b4a9c7ed | 1385 | case RPORT_ST_RTV: |
42e9a92f | 1386 | case RPORT_ST_READY: |
370c3bd0 JE |
1387 | case RPORT_ST_ADISC: |
1388 | FC_RPORT_DBG(rdata, "Received PLOGI in logged-in state %d " | |
1389 | "- ignored for now\n", rdata->rp_state); | |
1390 | /* XXX TBD - should reset */ | |
42e9a92f | 1391 | break; |
14194054 | 1392 | case RPORT_ST_DELETE: |
b4a9c7ed | 1393 | case RPORT_ST_LOGO: |
b4a9c7ed JE |
1394 | FC_RPORT_DBG(rdata, "Received PLOGI in state %s - send busy\n", |
1395 | fc_rport_state(rdata)); | |
1396 | mutex_unlock(&rdata->rp_mutex); | |
1397 | rjt_data.reason = ELS_RJT_BUSY; | |
1398 | rjt_data.explan = ELS_EXPL_NONE; | |
1399 | goto reject; | |
42e9a92f RL |
1400 | } |
1401 | ||
3ac6f98f JE |
1402 | /* |
1403 | * Get session payload size from incoming PLOGI. | |
1404 | */ | |
1405 | rdata->maxframe_size = fc_plogi_get_maxframe(pl, lport->mfs); | |
1406 | fc_frame_free(rx_fp); | |
1407 | ||
1408 | /* | |
1409 | * Send LS_ACC. If this fails, the originator should retry. | |
1410 | */ | |
1411 | sp = lport->tt.seq_start_next(sp); | |
1412 | if (!sp) | |
1413 | goto out; | |
1414 | fp = fc_frame_alloc(lport, sizeof(*pl)); | |
1415 | if (!fp) | |
1416 | goto out; | |
1417 | ||
1418 | fc_plogi_fill(lport, fp, ELS_LS_ACC); | |
1419 | f_ctl = FC_FC_EX_CTX | FC_FC_LAST_SEQ | FC_FC_END_SEQ | FC_FC_SEQ_INIT; | |
1420 | ep = fc_seq_exch(sp); | |
1421 | fc_fill_fc_hdr(fp, FC_RCTL_ELS_REP, ep->did, ep->sid, | |
1422 | FC_TYPE_ELS, f_ctl, 0); | |
1423 | lport->tt.seq_send(lport, sp, fp); | |
1424 | fc_rport_enter_prli(rdata); | |
1425 | out: | |
1426 | mutex_unlock(&rdata->rp_mutex); | |
1427 | return; | |
1428 | ||
1429 | reject: | |
1430 | lport->tt.seq_els_rsp_send(sp, ELS_LS_RJT, &rjt_data); | |
1431 | fc_frame_free(fp); | |
42e9a92f RL |
1432 | } |
1433 | ||
1434 | /** | |
3a3b42bf RL |
1435 | * fc_rport_recv_prli_req() - Handler for process login (PRLI) requests |
1436 | * @rdata: The remote port that sent the PRLI request | |
1437 | * @sp: The sequence that the PRLI was on | |
1438 | * @rx_fp: The PRLI request frame | |
42e9a92f RL |
1439 | * |
1440 | * Locking Note: The rport lock is exected to be held before calling | |
1441 | * this function. | |
1442 | */ | |
9fb9d328 | 1443 | static void fc_rport_recv_prli_req(struct fc_rport_priv *rdata, |
42e9a92f RL |
1444 | struct fc_seq *sp, struct fc_frame *rx_fp) |
1445 | { | |
42e9a92f RL |
1446 | struct fc_lport *lport = rdata->local_port; |
1447 | struct fc_exch *ep; | |
1448 | struct fc_frame *fp; | |
1449 | struct fc_frame_header *fh; | |
1450 | struct { | |
1451 | struct fc_els_prli prli; | |
1452 | struct fc_els_spp spp; | |
1453 | } *pp; | |
1454 | struct fc_els_spp *rspp; /* request service param page */ | |
1455 | struct fc_els_spp *spp; /* response spp */ | |
1456 | unsigned int len; | |
1457 | unsigned int plen; | |
42e9a92f RL |
1458 | enum fc_els_spp_resp resp; |
1459 | struct fc_seq_els_data rjt_data; | |
1460 | u32 f_ctl; | |
1461 | u32 fcp_parm; | |
1462 | u32 roles = FC_RPORT_ROLE_UNKNOWN; | |
42e9a92f | 1463 | |
a2f6a024 | 1464 | rjt_data.fp = NULL; |
42e9a92f RL |
1465 | fh = fc_frame_header_get(rx_fp); |
1466 | ||
9fb9d328 JE |
1467 | FC_RPORT_DBG(rdata, "Received PRLI request while in state %s\n", |
1468 | fc_rport_state(rdata)); | |
42e9a92f | 1469 | |
42e9a92f RL |
1470 | len = fr_len(rx_fp) - sizeof(*fh); |
1471 | pp = fc_frame_payload_get(rx_fp, sizeof(*pp)); | |
a2f6a024 JE |
1472 | if (!pp) |
1473 | goto reject_len; | |
1474 | plen = ntohs(pp->prli.prli_len); | |
1475 | if ((plen % 4) != 0 || plen > len || plen < 16) | |
1476 | goto reject_len; | |
1477 | if (plen < len) | |
1478 | len = plen; | |
1479 | plen = pp->prli.prli_spp_len; | |
1480 | if ((plen % 4) != 0 || plen < sizeof(*spp) || | |
1481 | plen > len || len < sizeof(*pp) || plen < 12) | |
1482 | goto reject_len; | |
1483 | rspp = &pp->spp; | |
1484 | ||
1485 | fp = fc_frame_alloc(lport, len); | |
1486 | if (!fp) { | |
1487 | rjt_data.reason = ELS_RJT_UNAB; | |
1488 | rjt_data.explan = ELS_EXPL_INSUF_RES; | |
1489 | goto reject; | |
42e9a92f | 1490 | } |
a2f6a024 JE |
1491 | sp = lport->tt.seq_start_next(sp); |
1492 | WARN_ON(!sp); | |
1493 | pp = fc_frame_payload_get(fp, len); | |
1494 | WARN_ON(!pp); | |
1495 | memset(pp, 0, len); | |
1496 | pp->prli.prli_cmd = ELS_LS_ACC; | |
1497 | pp->prli.prli_spp_len = plen; | |
1498 | pp->prli.prli_len = htons(len); | |
1499 | len -= sizeof(struct fc_els_prli); | |
42e9a92f | 1500 | |
a2f6a024 JE |
1501 | /* reinitialize remote port roles */ |
1502 | rdata->ids.roles = FC_RPORT_ROLE_UNKNOWN; | |
42e9a92f | 1503 | |
a2f6a024 JE |
1504 | /* |
1505 | * Go through all the service parameter pages and build | |
1506 | * response. If plen indicates longer SPP than standard, | |
1507 | * use that. The entire response has been pre-cleared above. | |
1508 | */ | |
1509 | spp = &pp->spp; | |
1510 | while (len >= plen) { | |
1511 | spp->spp_type = rspp->spp_type; | |
1512 | spp->spp_type_ext = rspp->spp_type_ext; | |
1513 | spp->spp_flags = rspp->spp_flags & FC_SPP_EST_IMG_PAIR; | |
1514 | resp = FC_SPP_RESP_ACK; | |
1515 | ||
1516 | switch (rspp->spp_type) { | |
1517 | case 0: /* common to all FC-4 types */ | |
42e9a92f | 1518 | break; |
a2f6a024 JE |
1519 | case FC_TYPE_FCP: |
1520 | fcp_parm = ntohl(rspp->spp_params); | |
1521 | if (fcp_parm & FCP_SPPF_RETRY) | |
1522 | rdata->flags |= FC_RP_FLAGS_RETRY; | |
1523 | rdata->supported_classes = FC_COS_CLASS3; | |
1524 | if (fcp_parm & FCP_SPPF_INIT_FCN) | |
1525 | roles |= FC_RPORT_ROLE_FCP_INITIATOR; | |
1526 | if (fcp_parm & FCP_SPPF_TARG_FCN) | |
1527 | roles |= FC_RPORT_ROLE_FCP_TARGET; | |
1528 | rdata->ids.roles = roles; | |
1529 | ||
1530 | spp->spp_params = htonl(lport->service_params); | |
42e9a92f RL |
1531 | break; |
1532 | default: | |
a2f6a024 | 1533 | resp = FC_SPP_RESP_INVL; |
42e9a92f RL |
1534 | break; |
1535 | } | |
a2f6a024 JE |
1536 | spp->spp_flags |= resp; |
1537 | len -= plen; | |
1538 | rspp = (struct fc_els_spp *)((char *)rspp + plen); | |
1539 | spp = (struct fc_els_spp *)((char *)spp + plen); | |
1540 | } | |
1541 | ||
1542 | /* | |
1543 | * Send LS_ACC. If this fails, the originator should retry. | |
1544 | */ | |
1545 | f_ctl = FC_FC_EX_CTX | FC_FC_LAST_SEQ; | |
1546 | f_ctl |= FC_FC_END_SEQ | FC_FC_SEQ_INIT; | |
1547 | ep = fc_seq_exch(sp); | |
1548 | fc_fill_fc_hdr(fp, FC_RCTL_ELS_REP, ep->did, ep->sid, | |
1549 | FC_TYPE_ELS, f_ctl, 0); | |
1550 | lport->tt.seq_send(lport, sp, fp); | |
1551 | ||
1552 | switch (rdata->rp_state) { | |
1553 | case RPORT_ST_PRLI: | |
1554 | fc_rport_enter_ready(rdata); | |
1555 | break; | |
1556 | default: | |
1557 | break; | |
42e9a92f | 1558 | } |
a2f6a024 JE |
1559 | goto drop; |
1560 | ||
1561 | reject_len: | |
1562 | rjt_data.reason = ELS_RJT_PROT; | |
1563 | rjt_data.explan = ELS_EXPL_INV_LEN; | |
1564 | reject: | |
1565 | lport->tt.seq_els_rsp_send(sp, ELS_LS_RJT, &rjt_data); | |
1566 | drop: | |
42e9a92f RL |
1567 | fc_frame_free(rx_fp); |
1568 | } | |
1569 | ||
1570 | /** | |
3a3b42bf RL |
1571 | * fc_rport_recv_prlo_req() - Handler for process logout (PRLO) requests |
1572 | * @rdata: The remote port that sent the PRLO request | |
1573 | * @sp: The sequence that the PRLO was on | |
f8fc6c2c | 1574 | * @rx_fp: The PRLO request frame |
42e9a92f RL |
1575 | * |
1576 | * Locking Note: The rport lock is exected to be held before calling | |
1577 | * this function. | |
1578 | */ | |
9fb9d328 JE |
1579 | static void fc_rport_recv_prlo_req(struct fc_rport_priv *rdata, |
1580 | struct fc_seq *sp, | |
f8fc6c2c | 1581 | struct fc_frame *rx_fp) |
42e9a92f | 1582 | { |
42e9a92f | 1583 | struct fc_lport *lport = rdata->local_port; |
42e9a92f | 1584 | struct fc_frame_header *fh; |
f8fc6c2c BPG |
1585 | struct fc_exch *ep; |
1586 | struct fc_frame *fp; | |
1587 | struct { | |
1588 | struct fc_els_prlo prlo; | |
1589 | struct fc_els_spp spp; | |
1590 | } *pp; | |
1591 | struct fc_els_spp *rspp; /* request service param page */ | |
1592 | struct fc_els_spp *spp; /* response spp */ | |
1593 | unsigned int len; | |
1594 | unsigned int plen; | |
1595 | u32 f_ctl; | |
42e9a92f RL |
1596 | struct fc_seq_els_data rjt_data; |
1597 | ||
f8fc6c2c BPG |
1598 | rjt_data.fp = NULL; |
1599 | fh = fc_frame_header_get(rx_fp); | |
42e9a92f | 1600 | |
9fb9d328 JE |
1601 | FC_RPORT_DBG(rdata, "Received PRLO request while in state %s\n", |
1602 | fc_rport_state(rdata)); | |
42e9a92f | 1603 | |
f8fc6c2c BPG |
1604 | len = fr_len(rx_fp) - sizeof(*fh); |
1605 | pp = fc_frame_payload_get(rx_fp, sizeof(*pp)); | |
1606 | if (!pp) | |
1607 | goto reject_len; | |
1608 | plen = ntohs(pp->prlo.prlo_len); | |
1609 | if (plen != 20) | |
1610 | goto reject_len; | |
1611 | if (plen < len) | |
1612 | len = plen; | |
1613 | ||
1614 | rspp = &pp->spp; | |
1615 | ||
1616 | fp = fc_frame_alloc(lport, len); | |
1617 | if (!fp) { | |
1618 | rjt_data.reason = ELS_RJT_UNAB; | |
1619 | rjt_data.explan = ELS_EXPL_INSUF_RES; | |
1620 | goto reject; | |
1621 | } | |
1622 | ||
1623 | sp = lport->tt.seq_start_next(sp); | |
1624 | WARN_ON(!sp); | |
1625 | pp = fc_frame_payload_get(fp, len); | |
1626 | WARN_ON(!pp); | |
1627 | memset(pp, 0, len); | |
1628 | pp->prlo.prlo_cmd = ELS_LS_ACC; | |
1629 | pp->prlo.prlo_obs = 0x10; | |
1630 | pp->prlo.prlo_len = htons(len); | |
1631 | spp = &pp->spp; | |
1632 | spp->spp_type = rspp->spp_type; | |
1633 | spp->spp_type_ext = rspp->spp_type_ext; | |
1634 | spp->spp_flags = FC_SPP_RESP_ACK; | |
1635 | ||
1636 | fc_rport_enter_delete(rdata, RPORT_EV_LOGO); | |
1637 | ||
1638 | f_ctl = FC_FC_EX_CTX | FC_FC_LAST_SEQ; | |
1639 | f_ctl |= FC_FC_END_SEQ | FC_FC_SEQ_INIT; | |
1640 | ep = fc_seq_exch(sp); | |
1641 | fc_fill_fc_hdr(fp, FC_RCTL_ELS_REP, ep->did, ep->sid, | |
1642 | FC_TYPE_ELS, f_ctl, 0); | |
1643 | lport->tt.seq_send(lport, sp, fp); | |
1644 | goto drop; | |
1645 | ||
1646 | reject_len: | |
1647 | rjt_data.reason = ELS_RJT_PROT; | |
1648 | rjt_data.explan = ELS_EXPL_INV_LEN; | |
1649 | reject: | |
42e9a92f | 1650 | lport->tt.seq_els_rsp_send(sp, ELS_LS_RJT, &rjt_data); |
f8fc6c2c BPG |
1651 | drop: |
1652 | fc_frame_free(rx_fp); | |
42e9a92f RL |
1653 | } |
1654 | ||
1655 | /** | |
3a3b42bf RL |
1656 | * fc_rport_recv_logo_req() - Handler for logout (LOGO) requests |
1657 | * @lport: The local port that received the LOGO request | |
1658 | * @sp: The sequence that the LOGO request was on | |
1659 | * @fp: The LOGO request frame | |
42e9a92f RL |
1660 | * |
1661 | * Locking Note: The rport lock is exected to be held before calling | |
1662 | * this function. | |
1663 | */ | |
83fe6a93 | 1664 | static void fc_rport_recv_logo_req(struct fc_lport *lport, |
9fb9d328 | 1665 | struct fc_seq *sp, |
42e9a92f RL |
1666 | struct fc_frame *fp) |
1667 | { | |
1668 | struct fc_frame_header *fh; | |
83fe6a93 JE |
1669 | struct fc_rport_priv *rdata; |
1670 | u32 sid; | |
42e9a92f | 1671 | |
feab4ae7 JE |
1672 | lport->tt.seq_els_rsp_send(sp, ELS_LS_ACC, NULL); |
1673 | ||
42e9a92f | 1674 | fh = fc_frame_header_get(fp); |
83fe6a93 | 1675 | sid = ntoh24(fh->fh_s_id); |
42e9a92f | 1676 | |
83fe6a93 JE |
1677 | mutex_lock(&lport->disc.disc_mutex); |
1678 | rdata = lport->tt.rport_lookup(lport, sid); | |
1679 | if (rdata) { | |
1680 | mutex_lock(&rdata->rp_mutex); | |
1681 | FC_RPORT_DBG(rdata, "Received LOGO request while in state %s\n", | |
1682 | fc_rport_state(rdata)); | |
feab4ae7 | 1683 | |
b4a9c7ed | 1684 | fc_rport_enter_delete(rdata, RPORT_EV_LOGO); |
83fe6a93 JE |
1685 | mutex_unlock(&rdata->rp_mutex); |
1686 | } else | |
1687 | FC_RPORT_ID_DBG(lport, sid, | |
1688 | "Received LOGO from non-logged-in port\n"); | |
1689 | mutex_unlock(&lport->disc.disc_mutex); | |
42e9a92f RL |
1690 | fc_frame_free(fp); |
1691 | } | |
1692 | ||
3a3b42bf RL |
1693 | /** |
1694 | * fc_rport_flush_queue() - Flush the rport_event_queue | |
1695 | */ | |
42e9a92f RL |
1696 | static void fc_rport_flush_queue(void) |
1697 | { | |
1698 | flush_workqueue(rport_event_queue); | |
1699 | } | |
1700 | ||
3a3b42bf RL |
1701 | /** |
1702 | * fc_rport_init() - Initialize the remote port layer for a local port | |
1703 | * @lport: The local port to initialize the remote port layer for | |
1704 | */ | |
42e9a92f RL |
1705 | int fc_rport_init(struct fc_lport *lport) |
1706 | { | |
8025b5db JE |
1707 | if (!lport->tt.rport_lookup) |
1708 | lport->tt.rport_lookup = fc_rport_lookup; | |
1709 | ||
5101ff99 | 1710 | if (!lport->tt.rport_create) |
9e9d0452 | 1711 | lport->tt.rport_create = fc_rport_create; |
5101ff99 | 1712 | |
42e9a92f RL |
1713 | if (!lport->tt.rport_login) |
1714 | lport->tt.rport_login = fc_rport_login; | |
1715 | ||
1716 | if (!lport->tt.rport_logoff) | |
1717 | lport->tt.rport_logoff = fc_rport_logoff; | |
1718 | ||
1719 | if (!lport->tt.rport_recv_req) | |
1720 | lport->tt.rport_recv_req = fc_rport_recv_req; | |
1721 | ||
1722 | if (!lport->tt.rport_flush_queue) | |
1723 | lport->tt.rport_flush_queue = fc_rport_flush_queue; | |
1724 | ||
f211fa51 JE |
1725 | if (!lport->tt.rport_destroy) |
1726 | lport->tt.rport_destroy = fc_rport_destroy; | |
1727 | ||
42e9a92f RL |
1728 | return 0; |
1729 | } | |
1730 | EXPORT_SYMBOL(fc_rport_init); | |
1731 | ||
3a3b42bf RL |
1732 | /** |
1733 | * fc_setup_rport() - Initialize the rport_event_queue | |
1734 | */ | |
1735 | int fc_setup_rport() | |
42e9a92f RL |
1736 | { |
1737 | rport_event_queue = create_singlethread_workqueue("fc_rport_eq"); | |
1738 | if (!rport_event_queue) | |
1739 | return -ENOMEM; | |
1740 | return 0; | |
1741 | } | |
42e9a92f | 1742 | |
3a3b42bf RL |
1743 | /** |
1744 | * fc_destroy_rport() - Destroy the rport_event_queue | |
1745 | */ | |
1746 | void fc_destroy_rport() | |
42e9a92f RL |
1747 | { |
1748 | destroy_workqueue(rport_event_queue); | |
1749 | } | |
42e9a92f | 1750 | |
3a3b42bf RL |
1751 | /** |
1752 | * fc_rport_terminate_io() - Stop all outstanding I/O on a remote port | |
1753 | * @rport: The remote port whose I/O should be terminated | |
1754 | */ | |
42e9a92f RL |
1755 | void fc_rport_terminate_io(struct fc_rport *rport) |
1756 | { | |
3a3b42bf RL |
1757 | struct fc_rport_libfc_priv *rpriv = rport->dd_data; |
1758 | struct fc_lport *lport = rpriv->local_port; | |
42e9a92f | 1759 | |
1f6ff364 AJ |
1760 | lport->tt.exch_mgr_reset(lport, 0, rport->port_id); |
1761 | lport->tt.exch_mgr_reset(lport, rport->port_id, 0); | |
42e9a92f RL |
1762 | } |
1763 | EXPORT_SYMBOL(fc_rport_terminate_io); |