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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 | |
732bee7a | 37 | * more comments on the hierarchy. |
42e9a92f RL |
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 | ||
55204909 | 61 | static struct workqueue_struct *rport_event_queue; |
42e9a92f | 62 | |
a7b12a27 | 63 | static void fc_rport_enter_flogi(struct fc_rport_priv *); |
9fb9d328 JE |
64 | static void fc_rport_enter_plogi(struct fc_rport_priv *); |
65 | static void fc_rport_enter_prli(struct fc_rport_priv *); | |
66 | static void fc_rport_enter_rtv(struct fc_rport_priv *); | |
67 | static void fc_rport_enter_ready(struct fc_rport_priv *); | |
68 | static void fc_rport_enter_logo(struct fc_rport_priv *); | |
370c3bd0 | 69 | static void fc_rport_enter_adisc(struct fc_rport_priv *); |
42e9a92f | 70 | |
92261156 JE |
71 | static void fc_rport_recv_plogi_req(struct fc_lport *, struct fc_frame *); |
72 | static void fc_rport_recv_prli_req(struct fc_rport_priv *, struct fc_frame *); | |
73 | static void fc_rport_recv_prlo_req(struct fc_rport_priv *, struct fc_frame *); | |
74 | static void fc_rport_recv_logo_req(struct fc_lport *, struct fc_frame *); | |
42e9a92f | 75 | static void fc_rport_timeout(struct work_struct *); |
9fb9d328 JE |
76 | static void fc_rport_error(struct fc_rport_priv *, struct fc_frame *); |
77 | static void fc_rport_error_retry(struct fc_rport_priv *, struct fc_frame *); | |
42e9a92f RL |
78 | static void fc_rport_work(struct work_struct *); |
79 | ||
80 | static const char *fc_rport_state_names[] = { | |
42e9a92f | 81 | [RPORT_ST_INIT] = "Init", |
a7b12a27 JE |
82 | [RPORT_ST_FLOGI] = "FLOGI", |
83 | [RPORT_ST_PLOGI_WAIT] = "PLOGI_WAIT", | |
42e9a92f RL |
84 | [RPORT_ST_PLOGI] = "PLOGI", |
85 | [RPORT_ST_PRLI] = "PRLI", | |
86 | [RPORT_ST_RTV] = "RTV", | |
87 | [RPORT_ST_READY] = "Ready", | |
370c3bd0 | 88 | [RPORT_ST_ADISC] = "ADISC", |
14194054 | 89 | [RPORT_ST_DELETE] = "Delete", |
42e9a92f RL |
90 | }; |
91 | ||
8025b5db | 92 | /** |
3a3b42bf RL |
93 | * fc_rport_lookup() - Lookup a remote port by port_id |
94 | * @lport: The local port to lookup the remote port on | |
95 | * @port_id: The remote port ID to look up | |
42e90414 JE |
96 | * |
97 | * The caller must hold either disc_mutex or rcu_read_lock(). | |
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 | ||
42e90414 | 104 | list_for_each_entry_rcu(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 | ||
f90377ab | 128 | rdata = kzalloc(sizeof(*rdata) + lport->rport_priv_size, GFP_KERNEL); |
9e9d0452 | 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) |
42e90414 | 149 | list_add_rcu(&rdata->peers, &lport->disc.rports); |
9fb9d328 | 150 | return rdata; |
42e9a92f RL |
151 | } |
152 | ||
42e90414 JE |
153 | /** |
154 | * fc_rport_free_rcu() - Free a remote port | |
155 | * @rcu: The rcu_head structure inside the remote port | |
156 | */ | |
157 | static void fc_rport_free_rcu(struct rcu_head *rcu) | |
158 | { | |
159 | struct fc_rport_priv *rdata; | |
160 | ||
161 | rdata = container_of(rcu, struct fc_rport_priv, rcu); | |
162 | kfree(rdata); | |
163 | } | |
164 | ||
f211fa51 | 165 | /** |
3a3b42bf RL |
166 | * fc_rport_destroy() - Free a remote port after last reference is released |
167 | * @kref: The remote port's kref | |
f211fa51 JE |
168 | */ |
169 | static void fc_rport_destroy(struct kref *kref) | |
170 | { | |
171 | struct fc_rport_priv *rdata; | |
f211fa51 JE |
172 | |
173 | rdata = container_of(kref, struct fc_rport_priv, kref); | |
42e90414 | 174 | call_rcu(&rdata->rcu, fc_rport_free_rcu); |
f211fa51 JE |
175 | } |
176 | ||
42e9a92f | 177 | /** |
3a3b42bf RL |
178 | * fc_rport_state() - Return a string identifying the remote port's state |
179 | * @rdata: The remote port | |
42e9a92f | 180 | */ |
9fb9d328 | 181 | static const char *fc_rport_state(struct fc_rport_priv *rdata) |
42e9a92f RL |
182 | { |
183 | const char *cp; | |
42e9a92f RL |
184 | |
185 | cp = fc_rport_state_names[rdata->rp_state]; | |
186 | if (!cp) | |
187 | cp = "Unknown"; | |
188 | return cp; | |
189 | } | |
190 | ||
191 | /** | |
3a3b42bf RL |
192 | * fc_set_rport_loss_tmo() - Set the remote port loss timeout |
193 | * @rport: The remote port that gets a new timeout value | |
194 | * @timeout: The new timeout value (in seconds) | |
42e9a92f RL |
195 | */ |
196 | void fc_set_rport_loss_tmo(struct fc_rport *rport, u32 timeout) | |
197 | { | |
198 | if (timeout) | |
73b43764 | 199 | rport->dev_loss_tmo = timeout; |
42e9a92f | 200 | else |
73b43764 | 201 | rport->dev_loss_tmo = 1; |
42e9a92f RL |
202 | } |
203 | EXPORT_SYMBOL(fc_set_rport_loss_tmo); | |
204 | ||
205 | /** | |
3a3b42bf RL |
206 | * fc_plogi_get_maxframe() - Get the maximum payload from the common service |
207 | * parameters in a FLOGI frame | |
a7b12a27 | 208 | * @flp: The FLOGI or PLOGI payload |
3a3b42bf RL |
209 | * @maxval: The maximum frame size upper limit; this may be less than what |
210 | * is in the service parameters | |
42e9a92f | 211 | */ |
b2ab99c9 RL |
212 | static unsigned int fc_plogi_get_maxframe(struct fc_els_flogi *flp, |
213 | unsigned int maxval) | |
42e9a92f RL |
214 | { |
215 | unsigned int mfs; | |
216 | ||
217 | /* | |
218 | * Get max payload from the common service parameters and the | |
219 | * class 3 receive data field size. | |
220 | */ | |
221 | mfs = ntohs(flp->fl_csp.sp_bb_data) & FC_SP_BB_DATA_MASK; | |
222 | if (mfs >= FC_SP_MIN_MAX_PAYLOAD && mfs < maxval) | |
223 | maxval = mfs; | |
224 | mfs = ntohs(flp->fl_cssp[3 - 1].cp_rdfs); | |
225 | if (mfs >= FC_SP_MIN_MAX_PAYLOAD && mfs < maxval) | |
226 | maxval = mfs; | |
227 | return maxval; | |
228 | } | |
229 | ||
230 | /** | |
3a3b42bf RL |
231 | * fc_rport_state_enter() - Change the state of a remote port |
232 | * @rdata: The remote port whose state should change | |
233 | * @new: The new state | |
42e9a92f RL |
234 | * |
235 | * Locking Note: Called with the rport lock held | |
236 | */ | |
9fb9d328 | 237 | static void fc_rport_state_enter(struct fc_rport_priv *rdata, |
42e9a92f RL |
238 | enum fc_rport_state new) |
239 | { | |
42e9a92f RL |
240 | if (rdata->rp_state != new) |
241 | rdata->retries = 0; | |
242 | rdata->rp_state = new; | |
243 | } | |
244 | ||
3a3b42bf RL |
245 | /** |
246 | * fc_rport_work() - Handler for remote port events in the rport_event_queue | |
247 | * @work: Handle to the remote port being dequeued | |
248 | */ | |
42e9a92f RL |
249 | static void fc_rport_work(struct work_struct *work) |
250 | { | |
571f824c | 251 | u32 port_id; |
ab28f1fd JE |
252 | struct fc_rport_priv *rdata = |
253 | container_of(work, struct fc_rport_priv, event_work); | |
3a3b42bf | 254 | struct fc_rport_libfc_priv *rpriv; |
42e9a92f | 255 | enum fc_rport_event event; |
42e9a92f RL |
256 | struct fc_lport *lport = rdata->local_port; |
257 | struct fc_rport_operations *rport_ops; | |
629f4427 | 258 | struct fc_rport_identifiers ids; |
f211fa51 | 259 | struct fc_rport *rport; |
96ad8464 JE |
260 | struct fc4_prov *prov; |
261 | u8 type; | |
42e9a92f RL |
262 | |
263 | mutex_lock(&rdata->rp_mutex); | |
264 | event = rdata->event; | |
265 | rport_ops = rdata->ops; | |
f211fa51 | 266 | rport = rdata->rport; |
42e9a92f | 267 | |
9e9d0452 JE |
268 | FC_RPORT_DBG(rdata, "work event %u\n", event); |
269 | ||
629f4427 | 270 | switch (event) { |
4c0f62b5 | 271 | case RPORT_EV_READY: |
f211fa51 | 272 | ids = rdata->ids; |
5f7ea3b7 | 273 | rdata->event = RPORT_EV_NONE; |
f034260d | 274 | rdata->major_retries = 0; |
9e9d0452 | 275 | kref_get(&rdata->kref); |
42e9a92f RL |
276 | mutex_unlock(&rdata->rp_mutex); |
277 | ||
9e9d0452 JE |
278 | if (!rport) |
279 | rport = fc_remote_port_add(lport->host, 0, &ids); | |
280 | if (!rport) { | |
281 | FC_RPORT_DBG(rdata, "Failed to add the rport\n"); | |
282 | lport->tt.rport_logoff(rdata); | |
283 | kref_put(&rdata->kref, lport->tt.rport_destroy); | |
284 | return; | |
42e9a92f | 285 | } |
9e9d0452 JE |
286 | mutex_lock(&rdata->rp_mutex); |
287 | if (rdata->rport) | |
288 | FC_RPORT_DBG(rdata, "rport already allocated\n"); | |
289 | rdata->rport = rport; | |
290 | rport->maxframe_size = rdata->maxframe_size; | |
291 | rport->supported_classes = rdata->supported_classes; | |
292 | ||
3a3b42bf RL |
293 | rpriv = rport->dd_data; |
294 | rpriv->local_port = lport; | |
295 | rpriv->rp_state = rdata->rp_state; | |
296 | rpriv->flags = rdata->flags; | |
297 | rpriv->e_d_tov = rdata->e_d_tov; | |
298 | rpriv->r_a_tov = rdata->r_a_tov; | |
9e9d0452 JE |
299 | mutex_unlock(&rdata->rp_mutex); |
300 | ||
8345592b | 301 | if (rport_ops && rport_ops->event_callback) { |
9e9d0452 | 302 | FC_RPORT_DBG(rdata, "callback ev %d\n", event); |
9fb9d328 | 303 | rport_ops->event_callback(lport, rdata, event); |
9e9d0452 JE |
304 | } |
305 | kref_put(&rdata->kref, lport->tt.rport_destroy); | |
629f4427 JE |
306 | break; |
307 | ||
308 | case RPORT_EV_FAILED: | |
309 | case RPORT_EV_LOGO: | |
310 | case RPORT_EV_STOP: | |
96ad8464 JE |
311 | if (rdata->prli_count) { |
312 | mutex_lock(&fc_prov_mutex); | |
313 | for (type = 1; type < FC_FC4_PROV_SIZE; type++) { | |
314 | prov = fc_passive_prov[type]; | |
315 | if (prov && prov->prlo) | |
316 | prov->prlo(rdata); | |
317 | } | |
318 | mutex_unlock(&fc_prov_mutex); | |
319 | } | |
9e9d0452 | 320 | port_id = rdata->ids.port_id; |
42e9a92f | 321 | mutex_unlock(&rdata->rp_mutex); |
9e9d0452 | 322 | |
8345592b | 323 | if (rport_ops && rport_ops->event_callback) { |
9e9d0452 | 324 | FC_RPORT_DBG(rdata, "callback ev %d\n", event); |
9fb9d328 | 325 | rport_ops->event_callback(lport, rdata, event); |
9e9d0452 | 326 | } |
201e5795 | 327 | cancel_delayed_work_sync(&rdata->retry_work); |
9e9d0452 JE |
328 | |
329 | /* | |
330 | * Reset any outstanding exchanges before freeing rport. | |
331 | */ | |
332 | lport->tt.exch_mgr_reset(lport, 0, port_id); | |
333 | lport->tt.exch_mgr_reset(lport, port_id, 0); | |
334 | ||
335 | if (rport) { | |
3a3b42bf RL |
336 | rpriv = rport->dd_data; |
337 | rpriv->rp_state = RPORT_ST_DELETE; | |
9e9d0452 JE |
338 | mutex_lock(&rdata->rp_mutex); |
339 | rdata->rport = NULL; | |
340 | mutex_unlock(&rdata->rp_mutex); | |
42e9a92f | 341 | fc_remote_port_delete(rport); |
571f824c | 342 | } |
4b2164d4 JE |
343 | |
344 | mutex_lock(&lport->disc.disc_mutex); | |
345 | mutex_lock(&rdata->rp_mutex); | |
346 | if (rdata->rp_state == RPORT_ST_DELETE) { | |
347 | if (port_id == FC_FID_DIR_SERV) { | |
348 | rdata->event = RPORT_EV_NONE; | |
349 | mutex_unlock(&rdata->rp_mutex); | |
f034260d JE |
350 | } else if ((rdata->flags & FC_RP_STARTED) && |
351 | rdata->major_retries < | |
352 | lport->max_rport_retry_count) { | |
353 | rdata->major_retries++; | |
4b2164d4 JE |
354 | rdata->event = RPORT_EV_NONE; |
355 | FC_RPORT_DBG(rdata, "work restart\n"); | |
a7b12a27 | 356 | fc_rport_enter_flogi(rdata); |
4b2164d4 JE |
357 | mutex_unlock(&rdata->rp_mutex); |
358 | } else { | |
359 | FC_RPORT_DBG(rdata, "work delete\n"); | |
42e90414 | 360 | list_del_rcu(&rdata->peers); |
4b2164d4 JE |
361 | mutex_unlock(&rdata->rp_mutex); |
362 | kref_put(&rdata->kref, lport->tt.rport_destroy); | |
363 | } | |
364 | } else { | |
365 | /* | |
366 | * Re-open for events. Reissue READY event if ready. | |
367 | */ | |
368 | rdata->event = RPORT_EV_NONE; | |
369 | if (rdata->rp_state == RPORT_ST_READY) | |
370 | fc_rport_enter_ready(rdata); | |
b4a9c7ed | 371 | mutex_unlock(&rdata->rp_mutex); |
4b2164d4 JE |
372 | } |
373 | mutex_unlock(&lport->disc.disc_mutex); | |
629f4427 JE |
374 | break; |
375 | ||
376 | default: | |
42e9a92f | 377 | mutex_unlock(&rdata->rp_mutex); |
629f4427 JE |
378 | break; |
379 | } | |
42e9a92f RL |
380 | } |
381 | ||
382 | /** | |
34f42a07 | 383 | * fc_rport_login() - Start the remote port login state machine |
3a3b42bf | 384 | * @rdata: The remote port to be logged in to |
42e9a92f RL |
385 | * |
386 | * Locking Note: Called without the rport lock held. This | |
387 | * function will hold the rport lock, call an _enter_* | |
388 | * function and then unlock the rport. | |
370c3bd0 JE |
389 | * |
390 | * This indicates the intent to be logged into the remote port. | |
391 | * If it appears we are already logged in, ADISC is used to verify | |
392 | * the setup. | |
42e9a92f | 393 | */ |
9fb9d328 | 394 | int fc_rport_login(struct fc_rport_priv *rdata) |
42e9a92f | 395 | { |
42e9a92f RL |
396 | mutex_lock(&rdata->rp_mutex); |
397 | ||
4b2164d4 | 398 | rdata->flags |= FC_RP_STARTED; |
370c3bd0 JE |
399 | switch (rdata->rp_state) { |
400 | case RPORT_ST_READY: | |
401 | FC_RPORT_DBG(rdata, "ADISC port\n"); | |
402 | fc_rport_enter_adisc(rdata); | |
403 | break; | |
b4a9c7ed JE |
404 | case RPORT_ST_DELETE: |
405 | FC_RPORT_DBG(rdata, "Restart deleted port\n"); | |
b4a9c7ed | 406 | break; |
370c3bd0 JE |
407 | default: |
408 | FC_RPORT_DBG(rdata, "Login to port\n"); | |
a7b12a27 | 409 | fc_rport_enter_flogi(rdata); |
370c3bd0 JE |
410 | break; |
411 | } | |
42e9a92f RL |
412 | mutex_unlock(&rdata->rp_mutex); |
413 | ||
414 | return 0; | |
415 | } | |
416 | ||
5f7ea3b7 | 417 | /** |
3a3b42bf RL |
418 | * fc_rport_enter_delete() - Schedule a remote port to be deleted |
419 | * @rdata: The remote port to be deleted | |
420 | * @event: The event to report as the reason for deletion | |
5f7ea3b7 JE |
421 | * |
422 | * Locking Note: Called with the rport lock held. | |
423 | * | |
424 | * Allow state change into DELETE only once. | |
425 | * | |
426 | * Call queue_work only if there's no event already pending. | |
427 | * Set the new event so that the old pending event will not occur. | |
428 | * Since we have the mutex, even if fc_rport_work() is already started, | |
429 | * it'll see the new event. | |
430 | */ | |
9fb9d328 | 431 | static void fc_rport_enter_delete(struct fc_rport_priv *rdata, |
5f7ea3b7 JE |
432 | enum fc_rport_event event) |
433 | { | |
5f7ea3b7 JE |
434 | if (rdata->rp_state == RPORT_ST_DELETE) |
435 | return; | |
436 | ||
9fb9d328 | 437 | FC_RPORT_DBG(rdata, "Delete port\n"); |
5f7ea3b7 | 438 | |
9fb9d328 | 439 | fc_rport_state_enter(rdata, RPORT_ST_DELETE); |
5f7ea3b7 JE |
440 | |
441 | if (rdata->event == RPORT_EV_NONE) | |
442 | queue_work(rport_event_queue, &rdata->event_work); | |
443 | rdata->event = event; | |
444 | } | |
445 | ||
42e9a92f | 446 | /** |
3a3b42bf RL |
447 | * fc_rport_logoff() - Logoff and remove a remote port |
448 | * @rdata: The remote port to be logged off of | |
42e9a92f RL |
449 | * |
450 | * Locking Note: Called without the rport lock held. This | |
451 | * function will hold the rport lock, call an _enter_* | |
452 | * function and then unlock the rport. | |
453 | */ | |
9fb9d328 | 454 | int fc_rport_logoff(struct fc_rport_priv *rdata) |
42e9a92f | 455 | { |
42e9a92f RL |
456 | mutex_lock(&rdata->rp_mutex); |
457 | ||
9fb9d328 | 458 | FC_RPORT_DBG(rdata, "Remove port\n"); |
42e9a92f | 459 | |
4b2164d4 | 460 | rdata->flags &= ~FC_RP_STARTED; |
14194054 | 461 | if (rdata->rp_state == RPORT_ST_DELETE) { |
9fb9d328 | 462 | FC_RPORT_DBG(rdata, "Port in Delete state, not removing\n"); |
b4c6f546 AJ |
463 | goto out; |
464 | } | |
4b2164d4 | 465 | fc_rport_enter_logo(rdata); |
42e9a92f RL |
466 | |
467 | /* | |
14194054 | 468 | * Change the state to Delete so that we discard |
42e9a92f RL |
469 | * the response. |
470 | */ | |
9fb9d328 | 471 | fc_rport_enter_delete(rdata, RPORT_EV_STOP); |
b4c6f546 | 472 | out: |
b4a9c7ed | 473 | mutex_unlock(&rdata->rp_mutex); |
42e9a92f RL |
474 | return 0; |
475 | } | |
476 | ||
477 | /** | |
3a3b42bf RL |
478 | * fc_rport_enter_ready() - Transition to the RPORT_ST_READY state |
479 | * @rdata: The remote port that is ready | |
42e9a92f RL |
480 | * |
481 | * Locking Note: The rport lock is expected to be held before calling | |
482 | * this routine. | |
483 | */ | |
9fb9d328 | 484 | static void fc_rport_enter_ready(struct fc_rport_priv *rdata) |
42e9a92f | 485 | { |
9fb9d328 | 486 | fc_rport_state_enter(rdata, RPORT_ST_READY); |
42e9a92f | 487 | |
9fb9d328 | 488 | FC_RPORT_DBG(rdata, "Port is Ready\n"); |
42e9a92f | 489 | |
5f7ea3b7 JE |
490 | if (rdata->event == RPORT_EV_NONE) |
491 | queue_work(rport_event_queue, &rdata->event_work); | |
4c0f62b5 | 492 | rdata->event = RPORT_EV_READY; |
42e9a92f RL |
493 | } |
494 | ||
495 | /** | |
3a3b42bf RL |
496 | * fc_rport_timeout() - Handler for the retry_work timer |
497 | * @work: Handle to the remote port that has timed out | |
42e9a92f RL |
498 | * |
499 | * Locking Note: Called without the rport lock held. This | |
500 | * function will hold the rport lock, call an _enter_* | |
501 | * function and then unlock the rport. | |
502 | */ | |
503 | static void fc_rport_timeout(struct work_struct *work) | |
504 | { | |
ab28f1fd JE |
505 | struct fc_rport_priv *rdata = |
506 | container_of(work, struct fc_rport_priv, retry_work.work); | |
42e9a92f RL |
507 | |
508 | mutex_lock(&rdata->rp_mutex); | |
509 | ||
510 | switch (rdata->rp_state) { | |
a7b12a27 JE |
511 | case RPORT_ST_FLOGI: |
512 | fc_rport_enter_flogi(rdata); | |
513 | break; | |
42e9a92f | 514 | case RPORT_ST_PLOGI: |
9fb9d328 | 515 | fc_rport_enter_plogi(rdata); |
42e9a92f RL |
516 | break; |
517 | case RPORT_ST_PRLI: | |
9fb9d328 | 518 | fc_rport_enter_prli(rdata); |
42e9a92f RL |
519 | break; |
520 | case RPORT_ST_RTV: | |
9fb9d328 | 521 | fc_rport_enter_rtv(rdata); |
42e9a92f | 522 | break; |
370c3bd0 JE |
523 | case RPORT_ST_ADISC: |
524 | fc_rport_enter_adisc(rdata); | |
525 | break; | |
a7b12a27 | 526 | case RPORT_ST_PLOGI_WAIT: |
42e9a92f RL |
527 | case RPORT_ST_READY: |
528 | case RPORT_ST_INIT: | |
14194054 | 529 | case RPORT_ST_DELETE: |
42e9a92f RL |
530 | break; |
531 | } | |
532 | ||
533 | mutex_unlock(&rdata->rp_mutex); | |
42e9a92f RL |
534 | } |
535 | ||
536 | /** | |
34f42a07 | 537 | * fc_rport_error() - Error handler, called once retries have been exhausted |
3a3b42bf RL |
538 | * @rdata: The remote port the error is happened on |
539 | * @fp: The error code encapsulated in a frame pointer | |
42e9a92f | 540 | * |
42e9a92f RL |
541 | * Locking Note: The rport lock is expected to be held before |
542 | * calling this routine | |
543 | */ | |
9fb9d328 | 544 | static void fc_rport_error(struct fc_rport_priv *rdata, struct fc_frame *fp) |
42e9a92f | 545 | { |
9fb9d328 | 546 | FC_RPORT_DBG(rdata, "Error %ld in state %s, retries %d\n", |
cdbe6dfe JE |
547 | IS_ERR(fp) ? -PTR_ERR(fp) : 0, |
548 | fc_rport_state(rdata), rdata->retries); | |
42e9a92f | 549 | |
6755db1c | 550 | switch (rdata->rp_state) { |
a7b12a27 | 551 | case RPORT_ST_FLOGI: |
6755db1c | 552 | case RPORT_ST_PLOGI: |
4b2164d4 | 553 | rdata->flags &= ~FC_RP_STARTED; |
9fb9d328 | 554 | fc_rport_enter_delete(rdata, RPORT_EV_FAILED); |
6755db1c CL |
555 | break; |
556 | case RPORT_ST_RTV: | |
9fb9d328 | 557 | fc_rport_enter_ready(rdata); |
6755db1c | 558 | break; |
370c3bd0 JE |
559 | case RPORT_ST_PRLI: |
560 | case RPORT_ST_ADISC: | |
561 | fc_rport_enter_logo(rdata); | |
562 | break; | |
a7b12a27 | 563 | case RPORT_ST_PLOGI_WAIT: |
14194054 | 564 | case RPORT_ST_DELETE: |
6755db1c CL |
565 | case RPORT_ST_READY: |
566 | case RPORT_ST_INIT: | |
567 | break; | |
42e9a92f RL |
568 | } |
569 | } | |
570 | ||
6755db1c | 571 | /** |
3a3b42bf RL |
572 | * fc_rport_error_retry() - Handler for remote port state retries |
573 | * @rdata: The remote port whose state is to be retried | |
574 | * @fp: The error code encapsulated in a frame pointer | |
6755db1c CL |
575 | * |
576 | * If the error was an exchange timeout retry immediately, | |
577 | * otherwise wait for E_D_TOV. | |
578 | * | |
579 | * Locking Note: The rport lock is expected to be held before | |
580 | * calling this routine | |
581 | */ | |
9fb9d328 JE |
582 | static void fc_rport_error_retry(struct fc_rport_priv *rdata, |
583 | struct fc_frame *fp) | |
6755db1c | 584 | { |
6755db1c CL |
585 | unsigned long delay = FC_DEF_E_D_TOV; |
586 | ||
587 | /* make sure this isn't an FC_EX_CLOSED error, never retry those */ | |
588 | if (PTR_ERR(fp) == -FC_EX_CLOSED) | |
28a4af1e | 589 | goto out; |
6755db1c | 590 | |
a3666955 | 591 | if (rdata->retries < rdata->local_port->max_rport_retry_count) { |
9fb9d328 JE |
592 | FC_RPORT_DBG(rdata, "Error %ld in state %s, retrying\n", |
593 | PTR_ERR(fp), fc_rport_state(rdata)); | |
6755db1c CL |
594 | rdata->retries++; |
595 | /* no additional delay on exchange timeouts */ | |
596 | if (PTR_ERR(fp) == -FC_EX_TIMEOUT) | |
597 | delay = 0; | |
6755db1c CL |
598 | schedule_delayed_work(&rdata->retry_work, delay); |
599 | return; | |
600 | } | |
601 | ||
28a4af1e HD |
602 | out: |
603 | fc_rport_error(rdata, fp); | |
6755db1c CL |
604 | } |
605 | ||
42e9a92f | 606 | /** |
a7b12a27 JE |
607 | * fc_rport_login_complete() - Handle parameters and completion of p-mp login. |
608 | * @rdata: The remote port which we logged into or which logged into us. | |
609 | * @fp: The FLOGI or PLOGI request or response frame | |
610 | * | |
611 | * Returns non-zero error if a problem is detected with the frame. | |
612 | * Does not free the frame. | |
613 | * | |
614 | * This is only used in point-to-multipoint mode for FIP currently. | |
615 | */ | |
616 | static int fc_rport_login_complete(struct fc_rport_priv *rdata, | |
617 | struct fc_frame *fp) | |
618 | { | |
619 | struct fc_lport *lport = rdata->local_port; | |
620 | struct fc_els_flogi *flogi; | |
621 | unsigned int e_d_tov; | |
622 | u16 csp_flags; | |
623 | ||
624 | flogi = fc_frame_payload_get(fp, sizeof(*flogi)); | |
625 | if (!flogi) | |
626 | return -EINVAL; | |
627 | ||
628 | csp_flags = ntohs(flogi->fl_csp.sp_features); | |
629 | ||
630 | if (fc_frame_payload_op(fp) == ELS_FLOGI) { | |
631 | if (csp_flags & FC_SP_FT_FPORT) { | |
632 | FC_RPORT_DBG(rdata, "Fabric bit set in FLOGI\n"); | |
633 | return -EINVAL; | |
634 | } | |
635 | } else { | |
636 | ||
637 | /* | |
638 | * E_D_TOV is not valid on an incoming FLOGI request. | |
639 | */ | |
640 | e_d_tov = ntohl(flogi->fl_csp.sp_e_d_tov); | |
641 | if (csp_flags & FC_SP_FT_EDTR) | |
642 | e_d_tov /= 1000000; | |
643 | if (e_d_tov > rdata->e_d_tov) | |
644 | rdata->e_d_tov = e_d_tov; | |
645 | } | |
646 | rdata->maxframe_size = fc_plogi_get_maxframe(flogi, lport->mfs); | |
647 | return 0; | |
648 | } | |
649 | ||
650 | /** | |
651 | * fc_rport_flogi_resp() - Handle response to FLOGI request for p-mp mode | |
652 | * @sp: The sequence that the FLOGI was on | |
653 | * @fp: The FLOGI response frame | |
654 | * @rp_arg: The remote port that received the FLOGI response | |
655 | */ | |
656 | void fc_rport_flogi_resp(struct fc_seq *sp, struct fc_frame *fp, | |
657 | void *rp_arg) | |
658 | { | |
659 | struct fc_rport_priv *rdata = rp_arg; | |
660 | struct fc_lport *lport = rdata->local_port; | |
661 | struct fc_els_flogi *flogi; | |
662 | unsigned int r_a_tov; | |
663 | ||
664 | FC_RPORT_DBG(rdata, "Received a FLOGI %s\n", fc_els_resp_type(fp)); | |
665 | ||
666 | if (fp == ERR_PTR(-FC_EX_CLOSED)) | |
0e9e3d3b | 667 | goto put; |
a7b12a27 JE |
668 | |
669 | mutex_lock(&rdata->rp_mutex); | |
670 | ||
671 | if (rdata->rp_state != RPORT_ST_FLOGI) { | |
672 | FC_RPORT_DBG(rdata, "Received a FLOGI response, but in state " | |
673 | "%s\n", fc_rport_state(rdata)); | |
674 | if (IS_ERR(fp)) | |
675 | goto err; | |
676 | goto out; | |
677 | } | |
678 | ||
679 | if (IS_ERR(fp)) { | |
680 | fc_rport_error(rdata, fp); | |
681 | goto err; | |
682 | } | |
683 | ||
684 | if (fc_frame_payload_op(fp) != ELS_LS_ACC) | |
685 | goto bad; | |
686 | if (fc_rport_login_complete(rdata, fp)) | |
687 | goto bad; | |
688 | ||
689 | flogi = fc_frame_payload_get(fp, sizeof(*flogi)); | |
690 | if (!flogi) | |
691 | goto bad; | |
692 | r_a_tov = ntohl(flogi->fl_csp.sp_r_a_tov); | |
693 | if (r_a_tov > rdata->r_a_tov) | |
694 | rdata->r_a_tov = r_a_tov; | |
695 | ||
696 | if (rdata->ids.port_name < lport->wwpn) | |
697 | fc_rport_enter_plogi(rdata); | |
698 | else | |
699 | fc_rport_state_enter(rdata, RPORT_ST_PLOGI_WAIT); | |
700 | out: | |
701 | fc_frame_free(fp); | |
702 | err: | |
703 | mutex_unlock(&rdata->rp_mutex); | |
0e9e3d3b | 704 | put: |
a7b12a27 JE |
705 | kref_put(&rdata->kref, rdata->local_port->tt.rport_destroy); |
706 | return; | |
707 | bad: | |
708 | FC_RPORT_DBG(rdata, "Bad FLOGI response\n"); | |
709 | fc_rport_error_retry(rdata, fp); | |
710 | goto out; | |
711 | } | |
712 | ||
713 | /** | |
714 | * fc_rport_enter_flogi() - Send a FLOGI request to the remote port for p-mp | |
715 | * @rdata: The remote port to send a FLOGI to | |
716 | * | |
717 | * Locking Note: The rport lock is expected to be held before calling | |
718 | * this routine. | |
719 | */ | |
720 | static void fc_rport_enter_flogi(struct fc_rport_priv *rdata) | |
721 | { | |
722 | struct fc_lport *lport = rdata->local_port; | |
723 | struct fc_frame *fp; | |
724 | ||
725 | if (!lport->point_to_multipoint) | |
726 | return fc_rport_enter_plogi(rdata); | |
727 | ||
728 | FC_RPORT_DBG(rdata, "Entered FLOGI state from %s state\n", | |
729 | fc_rport_state(rdata)); | |
730 | ||
731 | fc_rport_state_enter(rdata, RPORT_ST_FLOGI); | |
732 | ||
733 | fp = fc_frame_alloc(lport, sizeof(struct fc_els_flogi)); | |
734 | if (!fp) | |
735 | return fc_rport_error_retry(rdata, fp); | |
736 | ||
737 | if (!lport->tt.elsct_send(lport, rdata->ids.port_id, fp, ELS_FLOGI, | |
738 | fc_rport_flogi_resp, rdata, | |
739 | 2 * lport->r_a_tov)) | |
740 | fc_rport_error_retry(rdata, NULL); | |
741 | else | |
742 | kref_get(&rdata->kref); | |
743 | } | |
744 | ||
745 | /** | |
746 | * fc_rport_recv_flogi_req() - Handle Fabric Login (FLOGI) request in p-mp mode | |
747 | * @lport: The local port that received the PLOGI request | |
a7b12a27 JE |
748 | * @rx_fp: The PLOGI request frame |
749 | */ | |
750 | static void fc_rport_recv_flogi_req(struct fc_lport *lport, | |
92261156 | 751 | struct fc_frame *rx_fp) |
a7b12a27 JE |
752 | { |
753 | struct fc_disc *disc; | |
754 | struct fc_els_flogi *flp; | |
755 | struct fc_rport_priv *rdata; | |
756 | struct fc_frame *fp = rx_fp; | |
a7b12a27 | 757 | struct fc_seq_els_data rjt_data; |
24f089e2 | 758 | u32 sid; |
a7b12a27 | 759 | |
251748a9 | 760 | sid = fc_frame_sid(fp); |
a7b12a27 JE |
761 | |
762 | FC_RPORT_ID_DBG(lport, sid, "Received FLOGI request\n"); | |
763 | ||
764 | disc = &lport->disc; | |
765 | mutex_lock(&disc->disc_mutex); | |
766 | ||
767 | if (!lport->point_to_multipoint) { | |
768 | rjt_data.reason = ELS_RJT_UNSUP; | |
769 | rjt_data.explan = ELS_EXPL_NONE; | |
770 | goto reject; | |
771 | } | |
772 | ||
773 | flp = fc_frame_payload_get(fp, sizeof(*flp)); | |
774 | if (!flp) { | |
775 | rjt_data.reason = ELS_RJT_LOGIC; | |
776 | rjt_data.explan = ELS_EXPL_INV_LEN; | |
777 | goto reject; | |
778 | } | |
779 | ||
780 | rdata = lport->tt.rport_lookup(lport, sid); | |
781 | if (!rdata) { | |
782 | rjt_data.reason = ELS_RJT_FIP; | |
783 | rjt_data.explan = ELS_EXPL_NOT_NEIGHBOR; | |
784 | goto reject; | |
785 | } | |
786 | mutex_lock(&rdata->rp_mutex); | |
787 | ||
788 | FC_RPORT_DBG(rdata, "Received FLOGI in %s state\n", | |
789 | fc_rport_state(rdata)); | |
790 | ||
791 | switch (rdata->rp_state) { | |
792 | case RPORT_ST_INIT: | |
a7b12a27 JE |
793 | case RPORT_ST_DELETE: |
794 | mutex_unlock(&rdata->rp_mutex); | |
795 | rjt_data.reason = ELS_RJT_FIP; | |
796 | rjt_data.explan = ELS_EXPL_NOT_NEIGHBOR; | |
797 | goto reject; | |
798 | case RPORT_ST_FLOGI: | |
799 | case RPORT_ST_PLOGI_WAIT: | |
800 | case RPORT_ST_PLOGI: | |
801 | break; | |
802 | case RPORT_ST_PRLI: | |
803 | case RPORT_ST_RTV: | |
804 | case RPORT_ST_READY: | |
805 | case RPORT_ST_ADISC: | |
806 | /* | |
807 | * Set the remote port to be deleted and to then restart. | |
808 | * This queues work to be sure exchanges are reset. | |
809 | */ | |
810 | fc_rport_enter_delete(rdata, RPORT_EV_LOGO); | |
811 | mutex_unlock(&rdata->rp_mutex); | |
812 | rjt_data.reason = ELS_RJT_BUSY; | |
813 | rjt_data.explan = ELS_EXPL_NONE; | |
814 | goto reject; | |
815 | } | |
816 | if (fc_rport_login_complete(rdata, fp)) { | |
817 | mutex_unlock(&rdata->rp_mutex); | |
818 | rjt_data.reason = ELS_RJT_LOGIC; | |
819 | rjt_data.explan = ELS_EXPL_NONE; | |
820 | goto reject; | |
821 | } | |
a7b12a27 JE |
822 | |
823 | fp = fc_frame_alloc(lport, sizeof(*flp)); | |
824 | if (!fp) | |
825 | goto out; | |
826 | ||
a7b12a27 JE |
827 | fc_flogi_fill(lport, fp); |
828 | flp = fc_frame_payload_get(fp, sizeof(*flp)); | |
829 | flp->fl_cmd = ELS_LS_ACC; | |
830 | ||
24f089e2 JE |
831 | fc_fill_reply_hdr(fp, rx_fp, FC_RCTL_ELS_REP, 0); |
832 | lport->tt.frame_send(lport, fp); | |
a7b12a27 JE |
833 | |
834 | if (rdata->ids.port_name < lport->wwpn) | |
835 | fc_rport_enter_plogi(rdata); | |
836 | else | |
837 | fc_rport_state_enter(rdata, RPORT_ST_PLOGI_WAIT); | |
838 | out: | |
839 | mutex_unlock(&rdata->rp_mutex); | |
840 | mutex_unlock(&disc->disc_mutex); | |
24f089e2 | 841 | fc_frame_free(rx_fp); |
a7b12a27 JE |
842 | return; |
843 | ||
844 | reject: | |
845 | mutex_unlock(&disc->disc_mutex); | |
92261156 | 846 | lport->tt.seq_els_rsp_send(rx_fp, ELS_LS_RJT, &rjt_data); |
24f089e2 | 847 | fc_frame_free(rx_fp); |
a7b12a27 JE |
848 | } |
849 | ||
850 | /** | |
851 | * fc_rport_plogi_resp() - Handler for ELS PLOGI responses | |
3a3b42bf RL |
852 | * @sp: The sequence the PLOGI is on |
853 | * @fp: The PLOGI response frame | |
854 | * @rdata_arg: The remote port that sent the PLOGI response | |
42e9a92f RL |
855 | * |
856 | * Locking Note: This function will be called without the rport lock | |
857 | * held, but it will lock, call an _enter_* function or fc_rport_error | |
858 | * and then unlock the rport. | |
859 | */ | |
860 | static void fc_rport_plogi_resp(struct fc_seq *sp, struct fc_frame *fp, | |
9fb9d328 | 861 | void *rdata_arg) |
42e9a92f | 862 | { |
9fb9d328 | 863 | struct fc_rport_priv *rdata = rdata_arg; |
42e9a92f | 864 | struct fc_lport *lport = rdata->local_port; |
a29e7646 | 865 | struct fc_els_flogi *plp = NULL; |
42e9a92f RL |
866 | u16 csp_seq; |
867 | u16 cssp_seq; | |
868 | u8 op; | |
869 | ||
870 | mutex_lock(&rdata->rp_mutex); | |
871 | ||
f657d299 | 872 | FC_RPORT_DBG(rdata, "Received a PLOGI %s\n", fc_els_resp_type(fp)); |
42e9a92f RL |
873 | |
874 | if (rdata->rp_state != RPORT_ST_PLOGI) { | |
9fb9d328 JE |
875 | FC_RPORT_DBG(rdata, "Received a PLOGI response, but in state " |
876 | "%s\n", fc_rport_state(rdata)); | |
76f6804e AJ |
877 | if (IS_ERR(fp)) |
878 | goto err; | |
42e9a92f RL |
879 | goto out; |
880 | } | |
881 | ||
76f6804e | 882 | if (IS_ERR(fp)) { |
9fb9d328 | 883 | fc_rport_error_retry(rdata, fp); |
76f6804e AJ |
884 | goto err; |
885 | } | |
886 | ||
42e9a92f RL |
887 | op = fc_frame_payload_op(fp); |
888 | if (op == ELS_LS_ACC && | |
889 | (plp = fc_frame_payload_get(fp, sizeof(*plp))) != NULL) { | |
f211fa51 JE |
890 | rdata->ids.port_name = get_unaligned_be64(&plp->fl_wwpn); |
891 | rdata->ids.node_name = get_unaligned_be64(&plp->fl_wwnn); | |
42e9a92f | 892 | |
a7b12a27 JE |
893 | if (lport->point_to_multipoint) |
894 | fc_rport_login_complete(rdata, fp); | |
42e9a92f RL |
895 | csp_seq = ntohs(plp->fl_csp.sp_tot_seq); |
896 | cssp_seq = ntohs(plp->fl_cssp[3 - 1].cp_con_seq); | |
897 | if (cssp_seq < csp_seq) | |
898 | csp_seq = cssp_seq; | |
899 | rdata->max_seq = csp_seq; | |
f211fa51 | 900 | rdata->maxframe_size = fc_plogi_get_maxframe(plp, lport->mfs); |
3ac6f98f | 901 | fc_rport_enter_prli(rdata); |
42e9a92f | 902 | } else |
9fb9d328 | 903 | fc_rport_error_retry(rdata, fp); |
42e9a92f RL |
904 | |
905 | out: | |
906 | fc_frame_free(fp); | |
907 | err: | |
908 | mutex_unlock(&rdata->rp_mutex); | |
f211fa51 | 909 | kref_put(&rdata->kref, rdata->local_port->tt.rport_destroy); |
42e9a92f RL |
910 | } |
911 | ||
912 | /** | |
3a3b42bf RL |
913 | * fc_rport_enter_plogi() - Send Port Login (PLOGI) request |
914 | * @rdata: The remote port to send a PLOGI to | |
42e9a92f RL |
915 | * |
916 | * Locking Note: The rport lock is expected to be held before calling | |
917 | * this routine. | |
918 | */ | |
9fb9d328 | 919 | static void fc_rport_enter_plogi(struct fc_rport_priv *rdata) |
42e9a92f | 920 | { |
42e9a92f RL |
921 | struct fc_lport *lport = rdata->local_port; |
922 | struct fc_frame *fp; | |
923 | ||
9fb9d328 JE |
924 | FC_RPORT_DBG(rdata, "Port entered PLOGI state from %s state\n", |
925 | fc_rport_state(rdata)); | |
42e9a92f | 926 | |
9fb9d328 | 927 | fc_rport_state_enter(rdata, RPORT_ST_PLOGI); |
42e9a92f | 928 | |
f211fa51 | 929 | rdata->maxframe_size = FC_MIN_MAX_PAYLOAD; |
42e9a92f RL |
930 | fp = fc_frame_alloc(lport, sizeof(struct fc_els_flogi)); |
931 | if (!fp) { | |
a7b12a27 | 932 | FC_RPORT_DBG(rdata, "%s frame alloc failed\n", __func__); |
9fb9d328 | 933 | fc_rport_error_retry(rdata, fp); |
42e9a92f RL |
934 | return; |
935 | } | |
936 | rdata->e_d_tov = lport->e_d_tov; | |
937 | ||
f211fa51 | 938 | if (!lport->tt.elsct_send(lport, rdata->ids.port_id, fp, ELS_PLOGI, |
b94f8951 JE |
939 | fc_rport_plogi_resp, rdata, |
940 | 2 * lport->r_a_tov)) | |
8f550f93 | 941 | fc_rport_error_retry(rdata, NULL); |
42e9a92f | 942 | else |
f211fa51 | 943 | kref_get(&rdata->kref); |
42e9a92f RL |
944 | } |
945 | ||
946 | /** | |
34f42a07 | 947 | * fc_rport_prli_resp() - Process Login (PRLI) response handler |
3a3b42bf RL |
948 | * @sp: The sequence the PRLI response was on |
949 | * @fp: The PRLI response frame | |
950 | * @rdata_arg: The remote port that sent the PRLI response | |
42e9a92f RL |
951 | * |
952 | * Locking Note: This function will be called without the rport lock | |
953 | * held, but it will lock, call an _enter_* function or fc_rport_error | |
954 | * and then unlock the rport. | |
955 | */ | |
956 | static void fc_rport_prli_resp(struct fc_seq *sp, struct fc_frame *fp, | |
9fb9d328 | 957 | void *rdata_arg) |
42e9a92f | 958 | { |
9fb9d328 | 959 | struct fc_rport_priv *rdata = rdata_arg; |
42e9a92f RL |
960 | struct { |
961 | struct fc_els_prli prli; | |
962 | struct fc_els_spp spp; | |
963 | } *pp; | |
964 | u32 roles = FC_RPORT_ROLE_UNKNOWN; | |
965 | u32 fcp_parm = 0; | |
966 | u8 op; | |
618461c0 | 967 | u8 resp_code = 0; |
42e9a92f RL |
968 | |
969 | mutex_lock(&rdata->rp_mutex); | |
970 | ||
f657d299 | 971 | FC_RPORT_DBG(rdata, "Received a PRLI %s\n", fc_els_resp_type(fp)); |
42e9a92f RL |
972 | |
973 | if (rdata->rp_state != RPORT_ST_PRLI) { | |
9fb9d328 JE |
974 | FC_RPORT_DBG(rdata, "Received a PRLI response, but in state " |
975 | "%s\n", fc_rport_state(rdata)); | |
76f6804e AJ |
976 | if (IS_ERR(fp)) |
977 | goto err; | |
42e9a92f RL |
978 | goto out; |
979 | } | |
980 | ||
76f6804e | 981 | if (IS_ERR(fp)) { |
9fb9d328 | 982 | fc_rport_error_retry(rdata, fp); |
76f6804e AJ |
983 | goto err; |
984 | } | |
985 | ||
6bd054cb RL |
986 | /* reinitialize remote port roles */ |
987 | rdata->ids.roles = FC_RPORT_ROLE_UNKNOWN; | |
988 | ||
42e9a92f RL |
989 | op = fc_frame_payload_op(fp); |
990 | if (op == ELS_LS_ACC) { | |
991 | pp = fc_frame_payload_get(fp, sizeof(*pp)); | |
618461c0 BPG |
992 | if (!pp) |
993 | goto out; | |
994 | ||
995 | resp_code = (pp->spp.spp_flags & FC_SPP_RESP_MASK); | |
996 | FC_RPORT_DBG(rdata, "PRLI spp_flags = 0x%x\n", | |
997 | pp->spp.spp_flags); | |
998 | if (resp_code != FC_SPP_RESP_ACK) { | |
999 | if (resp_code == FC_SPP_RESP_CONF) | |
1000 | fc_rport_error(rdata, fp); | |
1001 | else | |
1002 | fc_rport_error_retry(rdata, fp); | |
1003 | goto out; | |
42e9a92f | 1004 | } |
618461c0 BPG |
1005 | if (pp->prli.prli_spp_len < sizeof(pp->spp)) |
1006 | goto out; | |
1007 | ||
1008 | fcp_parm = ntohl(pp->spp.spp_params); | |
1009 | if (fcp_parm & FCP_SPPF_RETRY) | |
1010 | rdata->flags |= FC_RP_FLAGS_RETRY; | |
42e9a92f | 1011 | |
f211fa51 | 1012 | rdata->supported_classes = FC_COS_CLASS3; |
42e9a92f RL |
1013 | if (fcp_parm & FCP_SPPF_INIT_FCN) |
1014 | roles |= FC_RPORT_ROLE_FCP_INITIATOR; | |
1015 | if (fcp_parm & FCP_SPPF_TARG_FCN) | |
1016 | roles |= FC_RPORT_ROLE_FCP_TARGET; | |
1017 | ||
f211fa51 | 1018 | rdata->ids.roles = roles; |
9fb9d328 | 1019 | fc_rport_enter_rtv(rdata); |
42e9a92f RL |
1020 | |
1021 | } else { | |
9fb9d328 | 1022 | FC_RPORT_DBG(rdata, "Bad ELS response for PRLI command\n"); |
292e40b9 | 1023 | fc_rport_error_retry(rdata, fp); |
42e9a92f RL |
1024 | } |
1025 | ||
1026 | out: | |
1027 | fc_frame_free(fp); | |
1028 | err: | |
1029 | mutex_unlock(&rdata->rp_mutex); | |
f211fa51 | 1030 | kref_put(&rdata->kref, rdata->local_port->tt.rport_destroy); |
42e9a92f RL |
1031 | } |
1032 | ||
42e9a92f | 1033 | /** |
3a3b42bf RL |
1034 | * fc_rport_enter_prli() - Send Process Login (PRLI) request |
1035 | * @rdata: The remote port to send the PRLI request to | |
42e9a92f RL |
1036 | * |
1037 | * Locking Note: The rport lock is expected to be held before calling | |
1038 | * this routine. | |
1039 | */ | |
9fb9d328 | 1040 | static void fc_rport_enter_prli(struct fc_rport_priv *rdata) |
42e9a92f | 1041 | { |
42e9a92f RL |
1042 | struct fc_lport *lport = rdata->local_port; |
1043 | struct { | |
1044 | struct fc_els_prli prli; | |
1045 | struct fc_els_spp spp; | |
1046 | } *pp; | |
1047 | struct fc_frame *fp; | |
1048 | ||
3ac6f98f JE |
1049 | /* |
1050 | * If the rport is one of the well known addresses | |
1051 | * we skip PRLI and RTV and go straight to READY. | |
1052 | */ | |
1053 | if (rdata->ids.port_id >= FC_FID_DOM_MGR) { | |
1054 | fc_rport_enter_ready(rdata); | |
1055 | return; | |
1056 | } | |
1057 | ||
9fb9d328 JE |
1058 | FC_RPORT_DBG(rdata, "Port entered PRLI state from %s state\n", |
1059 | fc_rport_state(rdata)); | |
42e9a92f | 1060 | |
9fb9d328 | 1061 | fc_rport_state_enter(rdata, RPORT_ST_PRLI); |
42e9a92f RL |
1062 | |
1063 | fp = fc_frame_alloc(lport, sizeof(*pp)); | |
1064 | if (!fp) { | |
9fb9d328 | 1065 | fc_rport_error_retry(rdata, fp); |
42e9a92f RL |
1066 | return; |
1067 | } | |
1068 | ||
f211fa51 | 1069 | if (!lport->tt.elsct_send(lport, rdata->ids.port_id, fp, ELS_PRLI, |
b94f8951 JE |
1070 | fc_rport_prli_resp, rdata, |
1071 | 2 * lport->r_a_tov)) | |
8f550f93 | 1072 | fc_rport_error_retry(rdata, NULL); |
42e9a92f | 1073 | else |
f211fa51 | 1074 | kref_get(&rdata->kref); |
42e9a92f RL |
1075 | } |
1076 | ||
1077 | /** | |
3a3b42bf RL |
1078 | * fc_rport_els_rtv_resp() - Handler for Request Timeout Value (RTV) responses |
1079 | * @sp: The sequence the RTV was on | |
1080 | * @fp: The RTV response frame | |
1081 | * @rdata_arg: The remote port that sent the RTV response | |
42e9a92f RL |
1082 | * |
1083 | * Many targets don't seem to support this. | |
1084 | * | |
1085 | * Locking Note: This function will be called without the rport lock | |
1086 | * held, but it will lock, call an _enter_* function or fc_rport_error | |
1087 | * and then unlock the rport. | |
1088 | */ | |
1089 | static void fc_rport_rtv_resp(struct fc_seq *sp, struct fc_frame *fp, | |
9fb9d328 | 1090 | void *rdata_arg) |
42e9a92f | 1091 | { |
9fb9d328 | 1092 | struct fc_rport_priv *rdata = rdata_arg; |
42e9a92f RL |
1093 | u8 op; |
1094 | ||
1095 | mutex_lock(&rdata->rp_mutex); | |
1096 | ||
f657d299 | 1097 | FC_RPORT_DBG(rdata, "Received a RTV %s\n", fc_els_resp_type(fp)); |
42e9a92f RL |
1098 | |
1099 | if (rdata->rp_state != RPORT_ST_RTV) { | |
9fb9d328 JE |
1100 | FC_RPORT_DBG(rdata, "Received a RTV response, but in state " |
1101 | "%s\n", fc_rport_state(rdata)); | |
76f6804e AJ |
1102 | if (IS_ERR(fp)) |
1103 | goto err; | |
42e9a92f RL |
1104 | goto out; |
1105 | } | |
1106 | ||
76f6804e | 1107 | if (IS_ERR(fp)) { |
9fb9d328 | 1108 | fc_rport_error(rdata, fp); |
76f6804e AJ |
1109 | goto err; |
1110 | } | |
1111 | ||
42e9a92f RL |
1112 | op = fc_frame_payload_op(fp); |
1113 | if (op == ELS_LS_ACC) { | |
1114 | struct fc_els_rtv_acc *rtv; | |
1115 | u32 toq; | |
1116 | u32 tov; | |
1117 | ||
1118 | rtv = fc_frame_payload_get(fp, sizeof(*rtv)); | |
1119 | if (rtv) { | |
1120 | toq = ntohl(rtv->rtv_toq); | |
1121 | tov = ntohl(rtv->rtv_r_a_tov); | |
1122 | if (tov == 0) | |
1123 | tov = 1; | |
1124 | rdata->r_a_tov = tov; | |
1125 | tov = ntohl(rtv->rtv_e_d_tov); | |
1126 | if (toq & FC_ELS_RTV_EDRES) | |
1127 | tov /= 1000000; | |
1128 | if (tov == 0) | |
1129 | tov = 1; | |
1130 | rdata->e_d_tov = tov; | |
1131 | } | |
1132 | } | |
1133 | ||
9fb9d328 | 1134 | fc_rport_enter_ready(rdata); |
42e9a92f RL |
1135 | |
1136 | out: | |
1137 | fc_frame_free(fp); | |
1138 | err: | |
1139 | mutex_unlock(&rdata->rp_mutex); | |
f211fa51 | 1140 | kref_put(&rdata->kref, rdata->local_port->tt.rport_destroy); |
42e9a92f RL |
1141 | } |
1142 | ||
1143 | /** | |
3a3b42bf RL |
1144 | * fc_rport_enter_rtv() - Send Request Timeout Value (RTV) request |
1145 | * @rdata: The remote port to send the RTV request to | |
42e9a92f RL |
1146 | * |
1147 | * Locking Note: The rport lock is expected to be held before calling | |
1148 | * this routine. | |
1149 | */ | |
9fb9d328 | 1150 | static void fc_rport_enter_rtv(struct fc_rport_priv *rdata) |
42e9a92f RL |
1151 | { |
1152 | struct fc_frame *fp; | |
42e9a92f RL |
1153 | struct fc_lport *lport = rdata->local_port; |
1154 | ||
9fb9d328 JE |
1155 | FC_RPORT_DBG(rdata, "Port entered RTV state from %s state\n", |
1156 | fc_rport_state(rdata)); | |
42e9a92f | 1157 | |
9fb9d328 | 1158 | fc_rport_state_enter(rdata, RPORT_ST_RTV); |
42e9a92f RL |
1159 | |
1160 | fp = fc_frame_alloc(lport, sizeof(struct fc_els_rtv)); | |
1161 | if (!fp) { | |
9fb9d328 | 1162 | fc_rport_error_retry(rdata, fp); |
42e9a92f RL |
1163 | return; |
1164 | } | |
1165 | ||
f211fa51 | 1166 | if (!lport->tt.elsct_send(lport, rdata->ids.port_id, fp, ELS_RTV, |
b94f8951 JE |
1167 | fc_rport_rtv_resp, rdata, |
1168 | 2 * lport->r_a_tov)) | |
8f550f93 | 1169 | fc_rport_error_retry(rdata, NULL); |
42e9a92f | 1170 | else |
f211fa51 | 1171 | kref_get(&rdata->kref); |
42e9a92f RL |
1172 | } |
1173 | ||
079ecd8c JE |
1174 | /** |
1175 | * fc_rport_logo_resp() - Handler for logout (LOGO) responses | |
1176 | * @sp: The sequence the LOGO was on | |
1177 | * @fp: The LOGO response frame | |
1178 | * @lport_arg: The local port | |
1179 | */ | |
1180 | static void fc_rport_logo_resp(struct fc_seq *sp, struct fc_frame *fp, | |
1181 | void *lport_arg) | |
1182 | { | |
1183 | struct fc_lport *lport = lport_arg; | |
1184 | ||
1185 | FC_RPORT_ID_DBG(lport, fc_seq_exch(sp)->did, | |
1186 | "Received a LOGO %s\n", fc_els_resp_type(fp)); | |
1187 | if (IS_ERR(fp)) | |
1188 | return; | |
1189 | fc_frame_free(fp); | |
1190 | } | |
1191 | ||
42e9a92f | 1192 | /** |
3a3b42bf RL |
1193 | * fc_rport_enter_logo() - Send a logout (LOGO) request |
1194 | * @rdata: The remote port to send the LOGO request to | |
42e9a92f RL |
1195 | * |
1196 | * Locking Note: The rport lock is expected to be held before calling | |
1197 | * this routine. | |
1198 | */ | |
9fb9d328 | 1199 | static void fc_rport_enter_logo(struct fc_rport_priv *rdata) |
42e9a92f | 1200 | { |
42e9a92f RL |
1201 | struct fc_lport *lport = rdata->local_port; |
1202 | struct fc_frame *fp; | |
1203 | ||
079ecd8c | 1204 | FC_RPORT_DBG(rdata, "Port sending LOGO from %s state\n", |
9fb9d328 | 1205 | fc_rport_state(rdata)); |
42e9a92f | 1206 | |
42e9a92f | 1207 | fp = fc_frame_alloc(lport, sizeof(struct fc_els_logo)); |
079ecd8c | 1208 | if (!fp) |
42e9a92f | 1209 | return; |
079ecd8c JE |
1210 | (void)lport->tt.elsct_send(lport, rdata->ids.port_id, fp, ELS_LOGO, |
1211 | fc_rport_logo_resp, lport, 0); | |
42e9a92f RL |
1212 | } |
1213 | ||
370c3bd0 | 1214 | /** |
3a3b42bf RL |
1215 | * fc_rport_els_adisc_resp() - Handler for Address Discovery (ADISC) responses |
1216 | * @sp: The sequence the ADISC response was on | |
1217 | * @fp: The ADISC response frame | |
1218 | * @rdata_arg: The remote port that sent the ADISC response | |
370c3bd0 JE |
1219 | * |
1220 | * Locking Note: This function will be called without the rport lock | |
1221 | * held, but it will lock, call an _enter_* function or fc_rport_error | |
1222 | * and then unlock the rport. | |
1223 | */ | |
1224 | static void fc_rport_adisc_resp(struct fc_seq *sp, struct fc_frame *fp, | |
3a3b42bf | 1225 | void *rdata_arg) |
370c3bd0 JE |
1226 | { |
1227 | struct fc_rport_priv *rdata = rdata_arg; | |
1228 | struct fc_els_adisc *adisc; | |
1229 | u8 op; | |
1230 | ||
1231 | mutex_lock(&rdata->rp_mutex); | |
1232 | ||
1233 | FC_RPORT_DBG(rdata, "Received a ADISC response\n"); | |
1234 | ||
1235 | if (rdata->rp_state != RPORT_ST_ADISC) { | |
1236 | FC_RPORT_DBG(rdata, "Received a ADISC resp but in state %s\n", | |
1237 | fc_rport_state(rdata)); | |
1238 | if (IS_ERR(fp)) | |
1239 | goto err; | |
1240 | goto out; | |
1241 | } | |
1242 | ||
1243 | if (IS_ERR(fp)) { | |
1244 | fc_rport_error(rdata, fp); | |
1245 | goto err; | |
1246 | } | |
1247 | ||
1248 | /* | |
1249 | * If address verification failed. Consider us logged out of the rport. | |
1250 | * Since the rport is still in discovery, we want to be | |
1251 | * logged in, so go to PLOGI state. Otherwise, go back to READY. | |
1252 | */ | |
1253 | op = fc_frame_payload_op(fp); | |
1254 | adisc = fc_frame_payload_get(fp, sizeof(*adisc)); | |
1255 | if (op != ELS_LS_ACC || !adisc || | |
1256 | ntoh24(adisc->adisc_port_id) != rdata->ids.port_id || | |
1257 | get_unaligned_be64(&adisc->adisc_wwpn) != rdata->ids.port_name || | |
1258 | get_unaligned_be64(&adisc->adisc_wwnn) != rdata->ids.node_name) { | |
1259 | FC_RPORT_DBG(rdata, "ADISC error or mismatch\n"); | |
a7b12a27 | 1260 | fc_rport_enter_flogi(rdata); |
370c3bd0 JE |
1261 | } else { |
1262 | FC_RPORT_DBG(rdata, "ADISC OK\n"); | |
1263 | fc_rport_enter_ready(rdata); | |
1264 | } | |
1265 | out: | |
1266 | fc_frame_free(fp); | |
1267 | err: | |
1268 | mutex_unlock(&rdata->rp_mutex); | |
1269 | kref_put(&rdata->kref, rdata->local_port->tt.rport_destroy); | |
1270 | } | |
1271 | ||
1272 | /** | |
3a3b42bf RL |
1273 | * fc_rport_enter_adisc() - Send Address Discover (ADISC) request |
1274 | * @rdata: The remote port to send the ADISC request to | |
370c3bd0 JE |
1275 | * |
1276 | * Locking Note: The rport lock is expected to be held before calling | |
1277 | * this routine. | |
1278 | */ | |
1279 | static void fc_rport_enter_adisc(struct fc_rport_priv *rdata) | |
1280 | { | |
1281 | struct fc_lport *lport = rdata->local_port; | |
1282 | struct fc_frame *fp; | |
1283 | ||
1284 | FC_RPORT_DBG(rdata, "sending ADISC from %s state\n", | |
1285 | fc_rport_state(rdata)); | |
1286 | ||
1287 | fc_rport_state_enter(rdata, RPORT_ST_ADISC); | |
1288 | ||
1289 | fp = fc_frame_alloc(lport, sizeof(struct fc_els_adisc)); | |
1290 | if (!fp) { | |
1291 | fc_rport_error_retry(rdata, fp); | |
1292 | return; | |
1293 | } | |
1294 | if (!lport->tt.elsct_send(lport, rdata->ids.port_id, fp, ELS_ADISC, | |
b94f8951 JE |
1295 | fc_rport_adisc_resp, rdata, |
1296 | 2 * lport->r_a_tov)) | |
8f550f93 | 1297 | fc_rport_error_retry(rdata, NULL); |
370c3bd0 JE |
1298 | else |
1299 | kref_get(&rdata->kref); | |
1300 | } | |
1301 | ||
8abbe3a4 | 1302 | /** |
3a3b42bf RL |
1303 | * fc_rport_recv_adisc_req() - Handler for Address Discovery (ADISC) requests |
1304 | * @rdata: The remote port that sent the ADISC request | |
3a3b42bf | 1305 | * @in_fp: The ADISC request frame |
8abbe3a4 JE |
1306 | * |
1307 | * Locking Note: Called with the lport and rport locks held. | |
1308 | */ | |
1309 | static void fc_rport_recv_adisc_req(struct fc_rport_priv *rdata, | |
92261156 | 1310 | struct fc_frame *in_fp) |
8abbe3a4 JE |
1311 | { |
1312 | struct fc_lport *lport = rdata->local_port; | |
1313 | struct fc_frame *fp; | |
8abbe3a4 JE |
1314 | struct fc_els_adisc *adisc; |
1315 | struct fc_seq_els_data rjt_data; | |
8abbe3a4 JE |
1316 | |
1317 | FC_RPORT_DBG(rdata, "Received ADISC request\n"); | |
1318 | ||
1319 | adisc = fc_frame_payload_get(in_fp, sizeof(*adisc)); | |
1320 | if (!adisc) { | |
8abbe3a4 JE |
1321 | rjt_data.reason = ELS_RJT_PROT; |
1322 | rjt_data.explan = ELS_EXPL_INV_LEN; | |
92261156 | 1323 | lport->tt.seq_els_rsp_send(in_fp, ELS_LS_RJT, &rjt_data); |
8abbe3a4 JE |
1324 | goto drop; |
1325 | } | |
1326 | ||
1327 | fp = fc_frame_alloc(lport, sizeof(*adisc)); | |
1328 | if (!fp) | |
1329 | goto drop; | |
1330 | fc_adisc_fill(lport, fp); | |
1331 | adisc = fc_frame_payload_get(fp, sizeof(*adisc)); | |
1332 | adisc->adisc_cmd = ELS_LS_ACC; | |
24f089e2 JE |
1333 | fc_fill_reply_hdr(fp, in_fp, FC_RCTL_ELS_REP, 0); |
1334 | lport->tt.frame_send(lport, fp); | |
8abbe3a4 JE |
1335 | drop: |
1336 | fc_frame_free(in_fp); | |
1337 | } | |
1338 | ||
63e27fb8 YZ |
1339 | /** |
1340 | * fc_rport_recv_rls_req() - Handle received Read Link Status request | |
1341 | * @rdata: The remote port that sent the RLS request | |
63e27fb8 YZ |
1342 | * @rx_fp: The PRLI request frame |
1343 | * | |
1344 | * Locking Note: The rport lock is expected to be held before calling | |
1345 | * this function. | |
1346 | */ | |
1347 | static void fc_rport_recv_rls_req(struct fc_rport_priv *rdata, | |
92261156 | 1348 | struct fc_frame *rx_fp) |
63e27fb8 YZ |
1349 | |
1350 | { | |
1351 | struct fc_lport *lport = rdata->local_port; | |
1352 | struct fc_frame *fp; | |
63e27fb8 YZ |
1353 | struct fc_els_rls *rls; |
1354 | struct fc_els_rls_resp *rsp; | |
1355 | struct fc_els_lesb *lesb; | |
1356 | struct fc_seq_els_data rjt_data; | |
1357 | struct fc_host_statistics *hst; | |
63e27fb8 YZ |
1358 | |
1359 | FC_RPORT_DBG(rdata, "Received RLS request while in state %s\n", | |
1360 | fc_rport_state(rdata)); | |
1361 | ||
1362 | rls = fc_frame_payload_get(rx_fp, sizeof(*rls)); | |
1363 | if (!rls) { | |
1364 | rjt_data.reason = ELS_RJT_PROT; | |
1365 | rjt_data.explan = ELS_EXPL_INV_LEN; | |
1366 | goto out_rjt; | |
1367 | } | |
1368 | ||
1369 | fp = fc_frame_alloc(lport, sizeof(*rsp)); | |
1370 | if (!fp) { | |
1371 | rjt_data.reason = ELS_RJT_UNAB; | |
1372 | rjt_data.explan = ELS_EXPL_INSUF_RES; | |
1373 | goto out_rjt; | |
1374 | } | |
1375 | ||
1376 | rsp = fc_frame_payload_get(fp, sizeof(*rsp)); | |
1377 | memset(rsp, 0, sizeof(*rsp)); | |
1378 | rsp->rls_cmd = ELS_LS_ACC; | |
1379 | lesb = &rsp->rls_lesb; | |
1380 | if (lport->tt.get_lesb) { | |
1381 | /* get LESB from LLD if it supports it */ | |
1382 | lport->tt.get_lesb(lport, lesb); | |
1383 | } else { | |
1384 | fc_get_host_stats(lport->host); | |
1385 | hst = &lport->host_stats; | |
1386 | lesb->lesb_link_fail = htonl(hst->link_failure_count); | |
1387 | lesb->lesb_sync_loss = htonl(hst->loss_of_sync_count); | |
1388 | lesb->lesb_sig_loss = htonl(hst->loss_of_signal_count); | |
1389 | lesb->lesb_prim_err = htonl(hst->prim_seq_protocol_err_count); | |
1390 | lesb->lesb_inv_word = htonl(hst->invalid_tx_word_count); | |
1391 | lesb->lesb_inv_crc = htonl(hst->invalid_crc_count); | |
1392 | } | |
1393 | ||
24f089e2 JE |
1394 | fc_fill_reply_hdr(fp, rx_fp, FC_RCTL_ELS_REP, 0); |
1395 | lport->tt.frame_send(lport, fp); | |
63e27fb8 YZ |
1396 | goto out; |
1397 | ||
1398 | out_rjt: | |
92261156 | 1399 | lport->tt.seq_els_rsp_send(rx_fp, ELS_LS_RJT, &rjt_data); |
63e27fb8 YZ |
1400 | out: |
1401 | fc_frame_free(rx_fp); | |
1402 | } | |
1403 | ||
42e9a92f | 1404 | /** |
3a3b42bf RL |
1405 | * fc_rport_recv_els_req() - Handler for validated ELS requests |
1406 | * @lport: The local port that received the ELS request | |
3a3b42bf | 1407 | * @fp: The ELS request frame |
83fe6a93 JE |
1408 | * |
1409 | * Handle incoming ELS requests that require port login. | |
1410 | * The ELS opcode has already been validated by the caller. | |
42e9a92f | 1411 | * |
131203a1 | 1412 | * Locking Note: Called with the lport lock held. |
42e9a92f | 1413 | */ |
92261156 | 1414 | static void fc_rport_recv_els_req(struct fc_lport *lport, struct fc_frame *fp) |
42e9a92f | 1415 | { |
131203a1 | 1416 | struct fc_rport_priv *rdata; |
42e9a92f | 1417 | struct fc_seq_els_data els_data; |
42e9a92f | 1418 | |
25b37b98 | 1419 | mutex_lock(&lport->disc.disc_mutex); |
251748a9 | 1420 | rdata = lport->tt.rport_lookup(lport, fc_frame_sid(fp)); |
131203a1 | 1421 | if (!rdata) { |
25b37b98 | 1422 | mutex_unlock(&lport->disc.disc_mutex); |
83fe6a93 | 1423 | goto reject; |
131203a1 JE |
1424 | } |
1425 | mutex_lock(&rdata->rp_mutex); | |
25b37b98 | 1426 | mutex_unlock(&lport->disc.disc_mutex); |
131203a1 | 1427 | |
83fe6a93 JE |
1428 | switch (rdata->rp_state) { |
1429 | case RPORT_ST_PRLI: | |
1430 | case RPORT_ST_RTV: | |
1431 | case RPORT_ST_READY: | |
370c3bd0 | 1432 | case RPORT_ST_ADISC: |
83fe6a93 JE |
1433 | break; |
1434 | default: | |
1435 | mutex_unlock(&rdata->rp_mutex); | |
1436 | goto reject; | |
1437 | } | |
1438 | ||
1439 | switch (fc_frame_payload_op(fp)) { | |
131203a1 | 1440 | case ELS_PRLI: |
92261156 | 1441 | fc_rport_recv_prli_req(rdata, fp); |
131203a1 JE |
1442 | break; |
1443 | case ELS_PRLO: | |
92261156 | 1444 | fc_rport_recv_prlo_req(rdata, fp); |
131203a1 | 1445 | break; |
8abbe3a4 | 1446 | case ELS_ADISC: |
92261156 | 1447 | fc_rport_recv_adisc_req(rdata, fp); |
8abbe3a4 | 1448 | break; |
131203a1 | 1449 | case ELS_RRQ: |
92261156 JE |
1450 | lport->tt.seq_els_rsp_send(fp, ELS_RRQ, NULL); |
1451 | fc_frame_free(fp); | |
131203a1 JE |
1452 | break; |
1453 | case ELS_REC: | |
92261156 JE |
1454 | lport->tt.seq_els_rsp_send(fp, ELS_REC, NULL); |
1455 | fc_frame_free(fp); | |
131203a1 | 1456 | break; |
63e27fb8 | 1457 | case ELS_RLS: |
92261156 | 1458 | fc_rport_recv_rls_req(rdata, fp); |
63e27fb8 | 1459 | break; |
131203a1 | 1460 | default: |
83fe6a93 | 1461 | fc_frame_free(fp); /* can't happen */ |
131203a1 | 1462 | break; |
42e9a92f RL |
1463 | } |
1464 | ||
1465 | mutex_unlock(&rdata->rp_mutex); | |
83fe6a93 JE |
1466 | return; |
1467 | ||
1468 | reject: | |
92261156 JE |
1469 | els_data.reason = ELS_RJT_UNAB; |
1470 | els_data.explan = ELS_EXPL_PLOGI_REQD; | |
1471 | lport->tt.seq_els_rsp_send(fp, ELS_LS_RJT, &els_data); | |
83fe6a93 JE |
1472 | fc_frame_free(fp); |
1473 | } | |
1474 | ||
1475 | /** | |
3a3b42bf | 1476 | * fc_rport_recv_req() - Handler for requests |
3a3b42bf | 1477 | * @lport: The local port that received the request |
92261156 | 1478 | * @fp: The request frame |
83fe6a93 JE |
1479 | * |
1480 | * Locking Note: Called with the lport lock held. | |
1481 | */ | |
92261156 | 1482 | void fc_rport_recv_req(struct fc_lport *lport, struct fc_frame *fp) |
83fe6a93 JE |
1483 | { |
1484 | struct fc_seq_els_data els_data; | |
1485 | ||
1486 | /* | |
a7b12a27 | 1487 | * Handle FLOGI, PLOGI and LOGO requests separately, since they |
83fe6a93 JE |
1488 | * don't require prior login. |
1489 | * Check for unsupported opcodes first and reject them. | |
1490 | * For some ops, it would be incorrect to reject with "PLOGI required". | |
1491 | */ | |
1492 | switch (fc_frame_payload_op(fp)) { | |
a7b12a27 | 1493 | case ELS_FLOGI: |
92261156 | 1494 | fc_rport_recv_flogi_req(lport, fp); |
a7b12a27 | 1495 | break; |
83fe6a93 | 1496 | case ELS_PLOGI: |
92261156 | 1497 | fc_rport_recv_plogi_req(lport, fp); |
83fe6a93 JE |
1498 | break; |
1499 | case ELS_LOGO: | |
92261156 | 1500 | fc_rport_recv_logo_req(lport, fp); |
83fe6a93 JE |
1501 | break; |
1502 | case ELS_PRLI: | |
1503 | case ELS_PRLO: | |
8abbe3a4 | 1504 | case ELS_ADISC: |
83fe6a93 JE |
1505 | case ELS_RRQ: |
1506 | case ELS_REC: | |
63e27fb8 | 1507 | case ELS_RLS: |
92261156 | 1508 | fc_rport_recv_els_req(lport, fp); |
83fe6a93 JE |
1509 | break; |
1510 | default: | |
83fe6a93 JE |
1511 | els_data.reason = ELS_RJT_UNSUP; |
1512 | els_data.explan = ELS_EXPL_NONE; | |
92261156 JE |
1513 | lport->tt.seq_els_rsp_send(fp, ELS_LS_RJT, &els_data); |
1514 | fc_frame_free(fp); | |
83fe6a93 JE |
1515 | break; |
1516 | } | |
42e9a92f RL |
1517 | } |
1518 | ||
1519 | /** | |
3a3b42bf RL |
1520 | * fc_rport_recv_plogi_req() - Handler for Port Login (PLOGI) requests |
1521 | * @lport: The local port that received the PLOGI request | |
3a3b42bf | 1522 | * @rx_fp: The PLOGI request frame |
42e9a92f | 1523 | * |
3ac6f98f | 1524 | * Locking Note: The rport lock is held before calling this function. |
42e9a92f | 1525 | */ |
3ac6f98f | 1526 | static void fc_rport_recv_plogi_req(struct fc_lport *lport, |
92261156 | 1527 | struct fc_frame *rx_fp) |
42e9a92f | 1528 | { |
3ac6f98f JE |
1529 | struct fc_disc *disc; |
1530 | struct fc_rport_priv *rdata; | |
42e9a92f | 1531 | struct fc_frame *fp = rx_fp; |
42e9a92f RL |
1532 | struct fc_els_flogi *pl; |
1533 | struct fc_seq_els_data rjt_data; | |
24f089e2 | 1534 | u32 sid; |
42e9a92f | 1535 | |
251748a9 | 1536 | sid = fc_frame_sid(fp); |
42e9a92f | 1537 | |
3ac6f98f | 1538 | FC_RPORT_ID_DBG(lport, sid, "Received PLOGI request\n"); |
42e9a92f | 1539 | |
42e9a92f RL |
1540 | pl = fc_frame_payload_get(fp, sizeof(*pl)); |
1541 | if (!pl) { | |
3ac6f98f JE |
1542 | FC_RPORT_ID_DBG(lport, sid, "Received PLOGI too short\n"); |
1543 | rjt_data.reason = ELS_RJT_PROT; | |
1544 | rjt_data.explan = ELS_EXPL_INV_LEN; | |
1545 | goto reject; | |
42e9a92f | 1546 | } |
3ac6f98f JE |
1547 | |
1548 | disc = &lport->disc; | |
1549 | mutex_lock(&disc->disc_mutex); | |
1550 | rdata = lport->tt.rport_create(lport, sid); | |
1551 | if (!rdata) { | |
1552 | mutex_unlock(&disc->disc_mutex); | |
1553 | rjt_data.reason = ELS_RJT_UNAB; | |
1554 | rjt_data.explan = ELS_EXPL_INSUF_RES; | |
1555 | goto reject; | |
1556 | } | |
1557 | ||
1558 | mutex_lock(&rdata->rp_mutex); | |
1559 | mutex_unlock(&disc->disc_mutex); | |
1560 | ||
1561 | rdata->ids.port_name = get_unaligned_be64(&pl->fl_wwpn); | |
1562 | rdata->ids.node_name = get_unaligned_be64(&pl->fl_wwnn); | |
42e9a92f RL |
1563 | |
1564 | /* | |
3ac6f98f | 1565 | * If the rport was just created, possibly due to the incoming PLOGI, |
42e9a92f RL |
1566 | * set the state appropriately and accept the PLOGI. |
1567 | * | |
1568 | * If we had also sent a PLOGI, and if the received PLOGI is from a | |
1569 | * higher WWPN, we accept it, otherwise an LS_RJT is sent with reason | |
1570 | * "command already in progress". | |
1571 | * | |
1572 | * XXX TBD: If the session was ready before, the PLOGI should result in | |
1573 | * all outstanding exchanges being reset. | |
1574 | */ | |
1575 | switch (rdata->rp_state) { | |
1576 | case RPORT_ST_INIT: | |
3ac6f98f | 1577 | FC_RPORT_DBG(rdata, "Received PLOGI in INIT state\n"); |
42e9a92f | 1578 | break; |
a7b12a27 JE |
1579 | case RPORT_ST_PLOGI_WAIT: |
1580 | FC_RPORT_DBG(rdata, "Received PLOGI in PLOGI_WAIT state\n"); | |
1581 | break; | |
42e9a92f | 1582 | case RPORT_ST_PLOGI: |
3ac6f98f JE |
1583 | FC_RPORT_DBG(rdata, "Received PLOGI in PLOGI state\n"); |
1584 | if (rdata->ids.port_name < lport->wwpn) { | |
1585 | mutex_unlock(&rdata->rp_mutex); | |
1586 | rjt_data.reason = ELS_RJT_INPROG; | |
1587 | rjt_data.explan = ELS_EXPL_NONE; | |
1588 | goto reject; | |
1589 | } | |
42e9a92f RL |
1590 | break; |
1591 | case RPORT_ST_PRLI: | |
b4a9c7ed | 1592 | case RPORT_ST_RTV: |
42e9a92f | 1593 | case RPORT_ST_READY: |
370c3bd0 JE |
1594 | case RPORT_ST_ADISC: |
1595 | FC_RPORT_DBG(rdata, "Received PLOGI in logged-in state %d " | |
1596 | "- ignored for now\n", rdata->rp_state); | |
1597 | /* XXX TBD - should reset */ | |
42e9a92f | 1598 | break; |
a7b12a27 | 1599 | case RPORT_ST_FLOGI: |
14194054 | 1600 | case RPORT_ST_DELETE: |
b4a9c7ed JE |
1601 | FC_RPORT_DBG(rdata, "Received PLOGI in state %s - send busy\n", |
1602 | fc_rport_state(rdata)); | |
1603 | mutex_unlock(&rdata->rp_mutex); | |
1604 | rjt_data.reason = ELS_RJT_BUSY; | |
1605 | rjt_data.explan = ELS_EXPL_NONE; | |
1606 | goto reject; | |
42e9a92f RL |
1607 | } |
1608 | ||
3ac6f98f JE |
1609 | /* |
1610 | * Get session payload size from incoming PLOGI. | |
1611 | */ | |
1612 | rdata->maxframe_size = fc_plogi_get_maxframe(pl, lport->mfs); | |
3ac6f98f JE |
1613 | |
1614 | /* | |
1615 | * Send LS_ACC. If this fails, the originator should retry. | |
1616 | */ | |
3ac6f98f JE |
1617 | fp = fc_frame_alloc(lport, sizeof(*pl)); |
1618 | if (!fp) | |
1619 | goto out; | |
1620 | ||
1621 | fc_plogi_fill(lport, fp, ELS_LS_ACC); | |
24f089e2 JE |
1622 | fc_fill_reply_hdr(fp, rx_fp, FC_RCTL_ELS_REP, 0); |
1623 | lport->tt.frame_send(lport, fp); | |
3ac6f98f JE |
1624 | fc_rport_enter_prli(rdata); |
1625 | out: | |
1626 | mutex_unlock(&rdata->rp_mutex); | |
24f089e2 | 1627 | fc_frame_free(rx_fp); |
3ac6f98f JE |
1628 | return; |
1629 | ||
1630 | reject: | |
92261156 | 1631 | lport->tt.seq_els_rsp_send(fp, ELS_LS_RJT, &rjt_data); |
3ac6f98f | 1632 | fc_frame_free(fp); |
42e9a92f RL |
1633 | } |
1634 | ||
1635 | /** | |
3a3b42bf RL |
1636 | * fc_rport_recv_prli_req() - Handler for process login (PRLI) requests |
1637 | * @rdata: The remote port that sent the PRLI request | |
3a3b42bf | 1638 | * @rx_fp: The PRLI request frame |
42e9a92f RL |
1639 | * |
1640 | * Locking Note: The rport lock is exected to be held before calling | |
1641 | * this function. | |
1642 | */ | |
9fb9d328 | 1643 | static void fc_rport_recv_prli_req(struct fc_rport_priv *rdata, |
92261156 | 1644 | struct fc_frame *rx_fp) |
42e9a92f | 1645 | { |
42e9a92f | 1646 | struct fc_lport *lport = rdata->local_port; |
42e9a92f | 1647 | struct fc_frame *fp; |
42e9a92f RL |
1648 | struct { |
1649 | struct fc_els_prli prli; | |
1650 | struct fc_els_spp spp; | |
1651 | } *pp; | |
1652 | struct fc_els_spp *rspp; /* request service param page */ | |
1653 | struct fc_els_spp *spp; /* response spp */ | |
1654 | unsigned int len; | |
1655 | unsigned int plen; | |
42e9a92f | 1656 | enum fc_els_spp_resp resp; |
96ad8464 | 1657 | enum fc_els_spp_resp passive; |
42e9a92f | 1658 | struct fc_seq_els_data rjt_data; |
96ad8464 | 1659 | struct fc4_prov *prov; |
42e9a92f | 1660 | |
9fb9d328 JE |
1661 | FC_RPORT_DBG(rdata, "Received PRLI request while in state %s\n", |
1662 | fc_rport_state(rdata)); | |
42e9a92f | 1663 | |
251748a9 | 1664 | len = fr_len(rx_fp) - sizeof(struct fc_frame_header); |
42e9a92f | 1665 | pp = fc_frame_payload_get(rx_fp, sizeof(*pp)); |
a2f6a024 JE |
1666 | if (!pp) |
1667 | goto reject_len; | |
1668 | plen = ntohs(pp->prli.prli_len); | |
1669 | if ((plen % 4) != 0 || plen > len || plen < 16) | |
1670 | goto reject_len; | |
1671 | if (plen < len) | |
1672 | len = plen; | |
1673 | plen = pp->prli.prli_spp_len; | |
1674 | if ((plen % 4) != 0 || plen < sizeof(*spp) || | |
1675 | plen > len || len < sizeof(*pp) || plen < 12) | |
1676 | goto reject_len; | |
1677 | rspp = &pp->spp; | |
1678 | ||
1679 | fp = fc_frame_alloc(lport, len); | |
1680 | if (!fp) { | |
1681 | rjt_data.reason = ELS_RJT_UNAB; | |
1682 | rjt_data.explan = ELS_EXPL_INSUF_RES; | |
1683 | goto reject; | |
42e9a92f | 1684 | } |
a2f6a024 JE |
1685 | pp = fc_frame_payload_get(fp, len); |
1686 | WARN_ON(!pp); | |
1687 | memset(pp, 0, len); | |
1688 | pp->prli.prli_cmd = ELS_LS_ACC; | |
1689 | pp->prli.prli_spp_len = plen; | |
1690 | pp->prli.prli_len = htons(len); | |
1691 | len -= sizeof(struct fc_els_prli); | |
42e9a92f | 1692 | |
a2f6a024 JE |
1693 | /* |
1694 | * Go through all the service parameter pages and build | |
1695 | * response. If plen indicates longer SPP than standard, | |
1696 | * use that. The entire response has been pre-cleared above. | |
1697 | */ | |
1698 | spp = &pp->spp; | |
96ad8464 | 1699 | mutex_lock(&fc_prov_mutex); |
a2f6a024 JE |
1700 | while (len >= plen) { |
1701 | spp->spp_type = rspp->spp_type; | |
1702 | spp->spp_type_ext = rspp->spp_type_ext; | |
96ad8464 JE |
1703 | resp = 0; |
1704 | ||
1705 | if (rspp->spp_type < FC_FC4_PROV_SIZE) { | |
1706 | prov = fc_active_prov[rspp->spp_type]; | |
1707 | if (prov) | |
1708 | resp = prov->prli(rdata, plen, rspp, spp); | |
1709 | prov = fc_passive_prov[rspp->spp_type]; | |
1710 | if (prov) { | |
1711 | passive = prov->prli(rdata, plen, rspp, spp); | |
1712 | if (!resp || passive == FC_SPP_RESP_ACK) | |
1713 | resp = passive; | |
1714 | } | |
1715 | } | |
1716 | if (!resp) { | |
1717 | if (spp->spp_flags & FC_SPP_EST_IMG_PAIR) | |
1718 | resp |= FC_SPP_RESP_CONF; | |
1719 | else | |
1720 | resp |= FC_SPP_RESP_INVL; | |
42e9a92f | 1721 | } |
a2f6a024 JE |
1722 | spp->spp_flags |= resp; |
1723 | len -= plen; | |
1724 | rspp = (struct fc_els_spp *)((char *)rspp + plen); | |
1725 | spp = (struct fc_els_spp *)((char *)spp + plen); | |
1726 | } | |
96ad8464 | 1727 | mutex_unlock(&fc_prov_mutex); |
a2f6a024 JE |
1728 | |
1729 | /* | |
1730 | * Send LS_ACC. If this fails, the originator should retry. | |
1731 | */ | |
24f089e2 JE |
1732 | fc_fill_reply_hdr(fp, rx_fp, FC_RCTL_ELS_REP, 0); |
1733 | lport->tt.frame_send(lport, fp); | |
a2f6a024 JE |
1734 | |
1735 | switch (rdata->rp_state) { | |
1736 | case RPORT_ST_PRLI: | |
1737 | fc_rport_enter_ready(rdata); | |
1738 | break; | |
1739 | default: | |
1740 | break; | |
42e9a92f | 1741 | } |
a2f6a024 JE |
1742 | goto drop; |
1743 | ||
1744 | reject_len: | |
1745 | rjt_data.reason = ELS_RJT_PROT; | |
1746 | rjt_data.explan = ELS_EXPL_INV_LEN; | |
1747 | reject: | |
92261156 | 1748 | lport->tt.seq_els_rsp_send(rx_fp, ELS_LS_RJT, &rjt_data); |
a2f6a024 | 1749 | drop: |
42e9a92f RL |
1750 | fc_frame_free(rx_fp); |
1751 | } | |
1752 | ||
1753 | /** | |
3a3b42bf RL |
1754 | * fc_rport_recv_prlo_req() - Handler for process logout (PRLO) requests |
1755 | * @rdata: The remote port that sent the PRLO request | |
f8fc6c2c | 1756 | * @rx_fp: The PRLO request frame |
42e9a92f RL |
1757 | * |
1758 | * Locking Note: The rport lock is exected to be held before calling | |
1759 | * this function. | |
1760 | */ | |
9fb9d328 | 1761 | static void fc_rport_recv_prlo_req(struct fc_rport_priv *rdata, |
f8fc6c2c | 1762 | struct fc_frame *rx_fp) |
42e9a92f | 1763 | { |
42e9a92f | 1764 | struct fc_lport *lport = rdata->local_port; |
f8fc6c2c BPG |
1765 | struct fc_frame *fp; |
1766 | struct { | |
1767 | struct fc_els_prlo prlo; | |
1768 | struct fc_els_spp spp; | |
1769 | } *pp; | |
1770 | struct fc_els_spp *rspp; /* request service param page */ | |
1771 | struct fc_els_spp *spp; /* response spp */ | |
1772 | unsigned int len; | |
1773 | unsigned int plen; | |
42e9a92f RL |
1774 | struct fc_seq_els_data rjt_data; |
1775 | ||
9fb9d328 JE |
1776 | FC_RPORT_DBG(rdata, "Received PRLO request while in state %s\n", |
1777 | fc_rport_state(rdata)); | |
42e9a92f | 1778 | |
251748a9 | 1779 | len = fr_len(rx_fp) - sizeof(struct fc_frame_header); |
f8fc6c2c BPG |
1780 | pp = fc_frame_payload_get(rx_fp, sizeof(*pp)); |
1781 | if (!pp) | |
1782 | goto reject_len; | |
1783 | plen = ntohs(pp->prlo.prlo_len); | |
1784 | if (plen != 20) | |
1785 | goto reject_len; | |
1786 | if (plen < len) | |
1787 | len = plen; | |
1788 | ||
1789 | rspp = &pp->spp; | |
1790 | ||
1791 | fp = fc_frame_alloc(lport, len); | |
1792 | if (!fp) { | |
1793 | rjt_data.reason = ELS_RJT_UNAB; | |
1794 | rjt_data.explan = ELS_EXPL_INSUF_RES; | |
1795 | goto reject; | |
1796 | } | |
1797 | ||
f8fc6c2c BPG |
1798 | pp = fc_frame_payload_get(fp, len); |
1799 | WARN_ON(!pp); | |
1800 | memset(pp, 0, len); | |
1801 | pp->prlo.prlo_cmd = ELS_LS_ACC; | |
1802 | pp->prlo.prlo_obs = 0x10; | |
1803 | pp->prlo.prlo_len = htons(len); | |
1804 | spp = &pp->spp; | |
1805 | spp->spp_type = rspp->spp_type; | |
1806 | spp->spp_type_ext = rspp->spp_type_ext; | |
1807 | spp->spp_flags = FC_SPP_RESP_ACK; | |
1808 | ||
1809 | fc_rport_enter_delete(rdata, RPORT_EV_LOGO); | |
1810 | ||
92261156 JE |
1811 | fc_fill_reply_hdr(fp, rx_fp, FC_RCTL_ELS_REP, 0); |
1812 | lport->tt.frame_send(lport, fp); | |
f8fc6c2c BPG |
1813 | goto drop; |
1814 | ||
1815 | reject_len: | |
1816 | rjt_data.reason = ELS_RJT_PROT; | |
1817 | rjt_data.explan = ELS_EXPL_INV_LEN; | |
1818 | reject: | |
92261156 | 1819 | lport->tt.seq_els_rsp_send(rx_fp, ELS_LS_RJT, &rjt_data); |
f8fc6c2c BPG |
1820 | drop: |
1821 | fc_frame_free(rx_fp); | |
42e9a92f RL |
1822 | } |
1823 | ||
1824 | /** | |
3a3b42bf RL |
1825 | * fc_rport_recv_logo_req() - Handler for logout (LOGO) requests |
1826 | * @lport: The local port that received the LOGO request | |
3a3b42bf | 1827 | * @fp: The LOGO request frame |
42e9a92f RL |
1828 | * |
1829 | * Locking Note: The rport lock is exected to be held before calling | |
1830 | * this function. | |
1831 | */ | |
92261156 | 1832 | static void fc_rport_recv_logo_req(struct fc_lport *lport, struct fc_frame *fp) |
42e9a92f | 1833 | { |
83fe6a93 JE |
1834 | struct fc_rport_priv *rdata; |
1835 | u32 sid; | |
42e9a92f | 1836 | |
92261156 | 1837 | lport->tt.seq_els_rsp_send(fp, ELS_LS_ACC, NULL); |
feab4ae7 | 1838 | |
251748a9 | 1839 | sid = fc_frame_sid(fp); |
42e9a92f | 1840 | |
83fe6a93 JE |
1841 | mutex_lock(&lport->disc.disc_mutex); |
1842 | rdata = lport->tt.rport_lookup(lport, sid); | |
1843 | if (rdata) { | |
1844 | mutex_lock(&rdata->rp_mutex); | |
1845 | FC_RPORT_DBG(rdata, "Received LOGO request while in state %s\n", | |
1846 | fc_rport_state(rdata)); | |
feab4ae7 | 1847 | |
b4a9c7ed | 1848 | fc_rport_enter_delete(rdata, RPORT_EV_LOGO); |
83fe6a93 JE |
1849 | mutex_unlock(&rdata->rp_mutex); |
1850 | } else | |
1851 | FC_RPORT_ID_DBG(lport, sid, | |
1852 | "Received LOGO from non-logged-in port\n"); | |
1853 | mutex_unlock(&lport->disc.disc_mutex); | |
42e9a92f RL |
1854 | fc_frame_free(fp); |
1855 | } | |
1856 | ||
3a3b42bf RL |
1857 | /** |
1858 | * fc_rport_flush_queue() - Flush the rport_event_queue | |
1859 | */ | |
42e9a92f RL |
1860 | static void fc_rport_flush_queue(void) |
1861 | { | |
1862 | flush_workqueue(rport_event_queue); | |
1863 | } | |
1864 | ||
3a3b42bf RL |
1865 | /** |
1866 | * fc_rport_init() - Initialize the remote port layer for a local port | |
1867 | * @lport: The local port to initialize the remote port layer for | |
1868 | */ | |
42e9a92f RL |
1869 | int fc_rport_init(struct fc_lport *lport) |
1870 | { | |
8025b5db JE |
1871 | if (!lport->tt.rport_lookup) |
1872 | lport->tt.rport_lookup = fc_rport_lookup; | |
1873 | ||
5101ff99 | 1874 | if (!lport->tt.rport_create) |
9e9d0452 | 1875 | lport->tt.rport_create = fc_rport_create; |
5101ff99 | 1876 | |
42e9a92f RL |
1877 | if (!lport->tt.rport_login) |
1878 | lport->tt.rport_login = fc_rport_login; | |
1879 | ||
1880 | if (!lport->tt.rport_logoff) | |
1881 | lport->tt.rport_logoff = fc_rport_logoff; | |
1882 | ||
1883 | if (!lport->tt.rport_recv_req) | |
1884 | lport->tt.rport_recv_req = fc_rport_recv_req; | |
1885 | ||
1886 | if (!lport->tt.rport_flush_queue) | |
1887 | lport->tt.rport_flush_queue = fc_rport_flush_queue; | |
1888 | ||
f211fa51 JE |
1889 | if (!lport->tt.rport_destroy) |
1890 | lport->tt.rport_destroy = fc_rport_destroy; | |
1891 | ||
42e9a92f RL |
1892 | return 0; |
1893 | } | |
1894 | EXPORT_SYMBOL(fc_rport_init); | |
1895 | ||
96ad8464 JE |
1896 | /** |
1897 | * fc_rport_fcp_prli() - Handle incoming PRLI for the FCP initiator. | |
1898 | * @rdata: remote port private | |
1899 | * @spp_len: service parameter page length | |
1900 | * @rspp: received service parameter page | |
1901 | * @spp: response service parameter page | |
1902 | * | |
1903 | * Returns the value for the response code to be placed in spp_flags; | |
1904 | * Returns 0 if not an initiator. | |
1905 | */ | |
1906 | static int fc_rport_fcp_prli(struct fc_rport_priv *rdata, u32 spp_len, | |
1907 | const struct fc_els_spp *rspp, | |
1908 | struct fc_els_spp *spp) | |
1909 | { | |
1910 | struct fc_lport *lport = rdata->local_port; | |
1911 | u32 fcp_parm; | |
1912 | ||
1913 | fcp_parm = ntohl(rspp->spp_params); | |
1914 | rdata->ids.roles = FC_RPORT_ROLE_UNKNOWN; | |
1915 | if (fcp_parm & FCP_SPPF_INIT_FCN) | |
1916 | rdata->ids.roles |= FC_RPORT_ROLE_FCP_INITIATOR; | |
1917 | if (fcp_parm & FCP_SPPF_TARG_FCN) | |
1918 | rdata->ids.roles |= FC_RPORT_ROLE_FCP_TARGET; | |
1919 | if (fcp_parm & FCP_SPPF_RETRY) | |
1920 | rdata->flags |= FC_RP_FLAGS_RETRY; | |
1921 | rdata->supported_classes = FC_COS_CLASS3; | |
1922 | ||
1923 | if (!(lport->service_params & FC_RPORT_ROLE_FCP_INITIATOR)) | |
1924 | return 0; | |
1925 | ||
1926 | spp->spp_flags |= rspp->spp_flags & FC_SPP_EST_IMG_PAIR; | |
1927 | ||
1928 | /* | |
1929 | * OR in our service parameters with other providers (target), if any. | |
1930 | */ | |
1931 | fcp_parm = ntohl(spp->spp_params); | |
1932 | spp->spp_params = htonl(fcp_parm | lport->service_params); | |
1933 | return FC_SPP_RESP_ACK; | |
1934 | } | |
1935 | ||
1936 | /* | |
1937 | * FC-4 provider ops for FCP initiator. | |
1938 | */ | |
1939 | struct fc4_prov fc_rport_fcp_init = { | |
1940 | .prli = fc_rport_fcp_prli, | |
1941 | }; | |
1942 | ||
1943 | /** | |
1944 | * fc_rport_t0_prli() - Handle incoming PRLI parameters for type 0 | |
1945 | * @rdata: remote port private | |
1946 | * @spp_len: service parameter page length | |
1947 | * @rspp: received service parameter page | |
1948 | * @spp: response service parameter page | |
1949 | */ | |
1950 | static int fc_rport_t0_prli(struct fc_rport_priv *rdata, u32 spp_len, | |
1951 | const struct fc_els_spp *rspp, | |
1952 | struct fc_els_spp *spp) | |
1953 | { | |
1954 | if (rspp->spp_flags & FC_SPP_EST_IMG_PAIR) | |
1955 | return FC_SPP_RESP_INVL; | |
1956 | return FC_SPP_RESP_ACK; | |
1957 | } | |
1958 | ||
1959 | /* | |
1960 | * FC-4 provider ops for type 0 service parameters. | |
1961 | * | |
1962 | * This handles the special case of type 0 which is always successful | |
1963 | * but doesn't do anything otherwise. | |
1964 | */ | |
1965 | struct fc4_prov fc_rport_t0_prov = { | |
1966 | .prli = fc_rport_t0_prli, | |
1967 | }; | |
1968 | ||
3a3b42bf RL |
1969 | /** |
1970 | * fc_setup_rport() - Initialize the rport_event_queue | |
1971 | */ | |
55204909 | 1972 | int fc_setup_rport(void) |
42e9a92f RL |
1973 | { |
1974 | rport_event_queue = create_singlethread_workqueue("fc_rport_eq"); | |
1975 | if (!rport_event_queue) | |
1976 | return -ENOMEM; | |
1977 | return 0; | |
1978 | } | |
42e9a92f | 1979 | |
3a3b42bf RL |
1980 | /** |
1981 | * fc_destroy_rport() - Destroy the rport_event_queue | |
1982 | */ | |
55204909 | 1983 | void fc_destroy_rport(void) |
42e9a92f RL |
1984 | { |
1985 | destroy_workqueue(rport_event_queue); | |
1986 | } | |
42e9a92f | 1987 | |
3a3b42bf RL |
1988 | /** |
1989 | * fc_rport_terminate_io() - Stop all outstanding I/O on a remote port | |
1990 | * @rport: The remote port whose I/O should be terminated | |
1991 | */ | |
42e9a92f RL |
1992 | void fc_rport_terminate_io(struct fc_rport *rport) |
1993 | { | |
3a3b42bf RL |
1994 | struct fc_rport_libfc_priv *rpriv = rport->dd_data; |
1995 | struct fc_lport *lport = rpriv->local_port; | |
42e9a92f | 1996 | |
1f6ff364 AJ |
1997 | lport->tt.exch_mgr_reset(lport, 0, rport->port_id); |
1998 | lport->tt.exch_mgr_reset(lport, rport->port_id, 0); | |
42e9a92f RL |
1999 | } |
2000 | EXPORT_SYMBOL(fc_rport_terminate_io); |