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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 | ||
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 | |
3ac6f98f | 71 | static void fc_rport_recv_plogi_req(struct fc_lport *, |
42e9a92f | 72 | struct fc_seq *, struct fc_frame *); |
9fb9d328 | 73 | static void fc_rport_recv_prli_req(struct fc_rport_priv *, |
42e9a92f | 74 | struct fc_seq *, struct fc_frame *); |
9fb9d328 | 75 | static void fc_rport_recv_prlo_req(struct fc_rport_priv *, |
42e9a92f | 76 | struct fc_seq *, struct fc_frame *); |
83fe6a93 | 77 | static void fc_rport_recv_logo_req(struct fc_lport *, |
42e9a92f RL |
78 | struct fc_seq *, struct fc_frame *); |
79 | static void fc_rport_timeout(struct work_struct *); | |
9fb9d328 JE |
80 | static void fc_rport_error(struct fc_rport_priv *, struct fc_frame *); |
81 | static void fc_rport_error_retry(struct fc_rport_priv *, struct fc_frame *); | |
42e9a92f RL |
82 | static void fc_rport_work(struct work_struct *); |
83 | ||
84 | static const char *fc_rport_state_names[] = { | |
42e9a92f | 85 | [RPORT_ST_INIT] = "Init", |
a7b12a27 JE |
86 | [RPORT_ST_FLOGI] = "FLOGI", |
87 | [RPORT_ST_PLOGI_WAIT] = "PLOGI_WAIT", | |
42e9a92f RL |
88 | [RPORT_ST_PLOGI] = "PLOGI", |
89 | [RPORT_ST_PRLI] = "PRLI", | |
90 | [RPORT_ST_RTV] = "RTV", | |
91 | [RPORT_ST_READY] = "Ready", | |
370c3bd0 | 92 | [RPORT_ST_ADISC] = "ADISC", |
14194054 | 93 | [RPORT_ST_DELETE] = "Delete", |
42e9a92f RL |
94 | }; |
95 | ||
8025b5db | 96 | /** |
3a3b42bf RL |
97 | * fc_rport_lookup() - Lookup a remote port by port_id |
98 | * @lport: The local port to lookup the remote port on | |
99 | * @port_id: The remote port ID to look up | |
42e90414 JE |
100 | * |
101 | * The caller must hold either disc_mutex or rcu_read_lock(). | |
8025b5db JE |
102 | */ |
103 | static struct fc_rport_priv *fc_rport_lookup(const struct fc_lport *lport, | |
104 | u32 port_id) | |
105 | { | |
106 | struct fc_rport_priv *rdata; | |
107 | ||
42e90414 | 108 | list_for_each_entry_rcu(rdata, &lport->disc.rports, peers) |
b4a9c7ed | 109 | if (rdata->ids.port_id == port_id) |
8025b5db JE |
110 | return rdata; |
111 | return NULL; | |
112 | } | |
113 | ||
9e9d0452 | 114 | /** |
9737e6a7 | 115 | * fc_rport_create() - Create a new remote port |
3a3b42bf RL |
116 | * @lport: The local port this remote port will be associated with |
117 | * @ids: The identifiers for the new remote port | |
118 | * | |
119 | * The remote port will start in the INIT state. | |
9e9d0452 | 120 | * |
48f00902 | 121 | * Locking note: must be called with the disc_mutex held. |
9e9d0452 JE |
122 | */ |
123 | static struct fc_rport_priv *fc_rport_create(struct fc_lport *lport, | |
9737e6a7 | 124 | u32 port_id) |
42e9a92f | 125 | { |
ab28f1fd | 126 | struct fc_rport_priv *rdata; |
42e9a92f | 127 | |
9737e6a7 | 128 | rdata = lport->tt.rport_lookup(lport, port_id); |
19f97e3c JE |
129 | if (rdata) |
130 | return rdata; | |
131 | ||
f90377ab | 132 | rdata = kzalloc(sizeof(*rdata) + lport->rport_priv_size, GFP_KERNEL); |
9e9d0452 | 133 | if (!rdata) |
42e9a92f RL |
134 | return NULL; |
135 | ||
9737e6a7 RL |
136 | rdata->ids.node_name = -1; |
137 | rdata->ids.port_name = -1; | |
138 | rdata->ids.port_id = port_id; | |
139 | rdata->ids.roles = FC_RPORT_ROLE_UNKNOWN; | |
140 | ||
f211fa51 | 141 | kref_init(&rdata->kref); |
42e9a92f | 142 | mutex_init(&rdata->rp_mutex); |
795d86f5 | 143 | rdata->local_port = lport; |
42e9a92f RL |
144 | rdata->rp_state = RPORT_ST_INIT; |
145 | rdata->event = RPORT_EV_NONE; | |
146 | rdata->flags = FC_RP_FLAGS_REC_SUPPORTED; | |
795d86f5 JE |
147 | rdata->e_d_tov = lport->e_d_tov; |
148 | rdata->r_a_tov = lport->r_a_tov; | |
f211fa51 | 149 | rdata->maxframe_size = FC_MIN_MAX_PAYLOAD; |
42e9a92f RL |
150 | INIT_DELAYED_WORK(&rdata->retry_work, fc_rport_timeout); |
151 | INIT_WORK(&rdata->event_work, fc_rport_work); | |
9737e6a7 | 152 | if (port_id != FC_FID_DIR_SERV) |
42e90414 | 153 | list_add_rcu(&rdata->peers, &lport->disc.rports); |
9fb9d328 | 154 | return rdata; |
42e9a92f RL |
155 | } |
156 | ||
42e90414 JE |
157 | /** |
158 | * fc_rport_free_rcu() - Free a remote port | |
159 | * @rcu: The rcu_head structure inside the remote port | |
160 | */ | |
161 | static void fc_rport_free_rcu(struct rcu_head *rcu) | |
162 | { | |
163 | struct fc_rport_priv *rdata; | |
164 | ||
165 | rdata = container_of(rcu, struct fc_rport_priv, rcu); | |
166 | kfree(rdata); | |
167 | } | |
168 | ||
f211fa51 | 169 | /** |
3a3b42bf RL |
170 | * fc_rport_destroy() - Free a remote port after last reference is released |
171 | * @kref: The remote port's kref | |
f211fa51 JE |
172 | */ |
173 | static void fc_rport_destroy(struct kref *kref) | |
174 | { | |
175 | struct fc_rport_priv *rdata; | |
f211fa51 JE |
176 | |
177 | rdata = container_of(kref, struct fc_rport_priv, kref); | |
42e90414 | 178 | call_rcu(&rdata->rcu, fc_rport_free_rcu); |
f211fa51 JE |
179 | } |
180 | ||
42e9a92f | 181 | /** |
3a3b42bf RL |
182 | * fc_rport_state() - Return a string identifying the remote port's state |
183 | * @rdata: The remote port | |
42e9a92f | 184 | */ |
9fb9d328 | 185 | static const char *fc_rport_state(struct fc_rport_priv *rdata) |
42e9a92f RL |
186 | { |
187 | const char *cp; | |
42e9a92f RL |
188 | |
189 | cp = fc_rport_state_names[rdata->rp_state]; | |
190 | if (!cp) | |
191 | cp = "Unknown"; | |
192 | return cp; | |
193 | } | |
194 | ||
195 | /** | |
3a3b42bf RL |
196 | * fc_set_rport_loss_tmo() - Set the remote port loss timeout |
197 | * @rport: The remote port that gets a new timeout value | |
198 | * @timeout: The new timeout value (in seconds) | |
42e9a92f RL |
199 | */ |
200 | void fc_set_rport_loss_tmo(struct fc_rport *rport, u32 timeout) | |
201 | { | |
202 | if (timeout) | |
203 | rport->dev_loss_tmo = timeout + 5; | |
204 | else | |
205 | rport->dev_loss_tmo = 30; | |
206 | } | |
207 | EXPORT_SYMBOL(fc_set_rport_loss_tmo); | |
208 | ||
209 | /** | |
3a3b42bf RL |
210 | * fc_plogi_get_maxframe() - Get the maximum payload from the common service |
211 | * parameters in a FLOGI frame | |
a7b12a27 | 212 | * @flp: The FLOGI or PLOGI payload |
3a3b42bf RL |
213 | * @maxval: The maximum frame size upper limit; this may be less than what |
214 | * is in the service parameters | |
42e9a92f | 215 | */ |
b2ab99c9 RL |
216 | static unsigned int fc_plogi_get_maxframe(struct fc_els_flogi *flp, |
217 | unsigned int maxval) | |
42e9a92f RL |
218 | { |
219 | unsigned int mfs; | |
220 | ||
221 | /* | |
222 | * Get max payload from the common service parameters and the | |
223 | * class 3 receive data field size. | |
224 | */ | |
225 | mfs = ntohs(flp->fl_csp.sp_bb_data) & FC_SP_BB_DATA_MASK; | |
226 | if (mfs >= FC_SP_MIN_MAX_PAYLOAD && mfs < maxval) | |
227 | maxval = mfs; | |
228 | mfs = ntohs(flp->fl_cssp[3 - 1].cp_rdfs); | |
229 | if (mfs >= FC_SP_MIN_MAX_PAYLOAD && mfs < maxval) | |
230 | maxval = mfs; | |
231 | return maxval; | |
232 | } | |
233 | ||
234 | /** | |
3a3b42bf RL |
235 | * fc_rport_state_enter() - Change the state of a remote port |
236 | * @rdata: The remote port whose state should change | |
237 | * @new: The new state | |
42e9a92f RL |
238 | * |
239 | * Locking Note: Called with the rport lock held | |
240 | */ | |
9fb9d328 | 241 | static void fc_rport_state_enter(struct fc_rport_priv *rdata, |
42e9a92f RL |
242 | enum fc_rport_state new) |
243 | { | |
42e9a92f RL |
244 | if (rdata->rp_state != new) |
245 | rdata->retries = 0; | |
246 | rdata->rp_state = new; | |
247 | } | |
248 | ||
3a3b42bf RL |
249 | /** |
250 | * fc_rport_work() - Handler for remote port events in the rport_event_queue | |
251 | * @work: Handle to the remote port being dequeued | |
252 | */ | |
42e9a92f RL |
253 | static void fc_rport_work(struct work_struct *work) |
254 | { | |
571f824c | 255 | u32 port_id; |
ab28f1fd JE |
256 | struct fc_rport_priv *rdata = |
257 | container_of(work, struct fc_rport_priv, event_work); | |
3a3b42bf | 258 | struct fc_rport_libfc_priv *rpriv; |
42e9a92f | 259 | enum fc_rport_event event; |
42e9a92f RL |
260 | struct fc_lport *lport = rdata->local_port; |
261 | struct fc_rport_operations *rport_ops; | |
629f4427 | 262 | struct fc_rport_identifiers ids; |
f211fa51 | 263 | struct fc_rport *rport; |
42e9a92f RL |
264 | |
265 | mutex_lock(&rdata->rp_mutex); | |
266 | event = rdata->event; | |
267 | rport_ops = rdata->ops; | |
f211fa51 | 268 | rport = rdata->rport; |
42e9a92f | 269 | |
9e9d0452 JE |
270 | FC_RPORT_DBG(rdata, "work event %u\n", event); |
271 | ||
629f4427 | 272 | switch (event) { |
4c0f62b5 | 273 | case RPORT_EV_READY: |
f211fa51 | 274 | ids = rdata->ids; |
5f7ea3b7 | 275 | rdata->event = RPORT_EV_NONE; |
f034260d | 276 | rdata->major_retries = 0; |
9e9d0452 | 277 | kref_get(&rdata->kref); |
42e9a92f RL |
278 | mutex_unlock(&rdata->rp_mutex); |
279 | ||
9e9d0452 JE |
280 | if (!rport) |
281 | rport = fc_remote_port_add(lport->host, 0, &ids); | |
282 | if (!rport) { | |
283 | FC_RPORT_DBG(rdata, "Failed to add the rport\n"); | |
284 | lport->tt.rport_logoff(rdata); | |
285 | kref_put(&rdata->kref, lport->tt.rport_destroy); | |
286 | return; | |
42e9a92f | 287 | } |
9e9d0452 JE |
288 | mutex_lock(&rdata->rp_mutex); |
289 | if (rdata->rport) | |
290 | FC_RPORT_DBG(rdata, "rport already allocated\n"); | |
291 | rdata->rport = rport; | |
292 | rport->maxframe_size = rdata->maxframe_size; | |
293 | rport->supported_classes = rdata->supported_classes; | |
294 | ||
3a3b42bf RL |
295 | rpriv = rport->dd_data; |
296 | rpriv->local_port = lport; | |
297 | rpriv->rp_state = rdata->rp_state; | |
298 | rpriv->flags = rdata->flags; | |
299 | rpriv->e_d_tov = rdata->e_d_tov; | |
300 | rpriv->r_a_tov = rdata->r_a_tov; | |
9e9d0452 JE |
301 | mutex_unlock(&rdata->rp_mutex); |
302 | ||
8345592b | 303 | if (rport_ops && rport_ops->event_callback) { |
9e9d0452 | 304 | FC_RPORT_DBG(rdata, "callback ev %d\n", event); |
9fb9d328 | 305 | rport_ops->event_callback(lport, rdata, event); |
9e9d0452 JE |
306 | } |
307 | kref_put(&rdata->kref, lport->tt.rport_destroy); | |
629f4427 JE |
308 | break; |
309 | ||
310 | case RPORT_EV_FAILED: | |
311 | case RPORT_EV_LOGO: | |
312 | case RPORT_EV_STOP: | |
9e9d0452 | 313 | port_id = rdata->ids.port_id; |
42e9a92f | 314 | mutex_unlock(&rdata->rp_mutex); |
9e9d0452 | 315 | |
8345592b | 316 | if (rport_ops && rport_ops->event_callback) { |
9e9d0452 | 317 | FC_RPORT_DBG(rdata, "callback ev %d\n", event); |
9fb9d328 | 318 | rport_ops->event_callback(lport, rdata, event); |
9e9d0452 | 319 | } |
201e5795 | 320 | cancel_delayed_work_sync(&rdata->retry_work); |
9e9d0452 JE |
321 | |
322 | /* | |
323 | * Reset any outstanding exchanges before freeing rport. | |
324 | */ | |
325 | lport->tt.exch_mgr_reset(lport, 0, port_id); | |
326 | lport->tt.exch_mgr_reset(lport, port_id, 0); | |
327 | ||
328 | if (rport) { | |
3a3b42bf RL |
329 | rpriv = rport->dd_data; |
330 | rpriv->rp_state = RPORT_ST_DELETE; | |
9e9d0452 JE |
331 | mutex_lock(&rdata->rp_mutex); |
332 | rdata->rport = NULL; | |
333 | mutex_unlock(&rdata->rp_mutex); | |
42e9a92f | 334 | fc_remote_port_delete(rport); |
571f824c | 335 | } |
4b2164d4 JE |
336 | |
337 | mutex_lock(&lport->disc.disc_mutex); | |
338 | mutex_lock(&rdata->rp_mutex); | |
339 | if (rdata->rp_state == RPORT_ST_DELETE) { | |
340 | if (port_id == FC_FID_DIR_SERV) { | |
341 | rdata->event = RPORT_EV_NONE; | |
342 | mutex_unlock(&rdata->rp_mutex); | |
f034260d JE |
343 | } else if ((rdata->flags & FC_RP_STARTED) && |
344 | rdata->major_retries < | |
345 | lport->max_rport_retry_count) { | |
346 | rdata->major_retries++; | |
4b2164d4 JE |
347 | rdata->event = RPORT_EV_NONE; |
348 | FC_RPORT_DBG(rdata, "work restart\n"); | |
a7b12a27 | 349 | fc_rport_enter_flogi(rdata); |
4b2164d4 JE |
350 | mutex_unlock(&rdata->rp_mutex); |
351 | } else { | |
352 | FC_RPORT_DBG(rdata, "work delete\n"); | |
42e90414 | 353 | list_del_rcu(&rdata->peers); |
4b2164d4 JE |
354 | mutex_unlock(&rdata->rp_mutex); |
355 | kref_put(&rdata->kref, lport->tt.rport_destroy); | |
356 | } | |
357 | } else { | |
358 | /* | |
359 | * Re-open for events. Reissue READY event if ready. | |
360 | */ | |
361 | rdata->event = RPORT_EV_NONE; | |
362 | if (rdata->rp_state == RPORT_ST_READY) | |
363 | fc_rport_enter_ready(rdata); | |
b4a9c7ed | 364 | mutex_unlock(&rdata->rp_mutex); |
4b2164d4 JE |
365 | } |
366 | mutex_unlock(&lport->disc.disc_mutex); | |
629f4427 JE |
367 | break; |
368 | ||
369 | default: | |
42e9a92f | 370 | mutex_unlock(&rdata->rp_mutex); |
629f4427 JE |
371 | break; |
372 | } | |
42e9a92f RL |
373 | } |
374 | ||
375 | /** | |
34f42a07 | 376 | * fc_rport_login() - Start the remote port login state machine |
3a3b42bf | 377 | * @rdata: The remote port to be logged in to |
42e9a92f RL |
378 | * |
379 | * Locking Note: Called without the rport lock held. This | |
380 | * function will hold the rport lock, call an _enter_* | |
381 | * function and then unlock the rport. | |
370c3bd0 JE |
382 | * |
383 | * This indicates the intent to be logged into the remote port. | |
384 | * If it appears we are already logged in, ADISC is used to verify | |
385 | * the setup. | |
42e9a92f | 386 | */ |
9fb9d328 | 387 | int fc_rport_login(struct fc_rport_priv *rdata) |
42e9a92f | 388 | { |
42e9a92f RL |
389 | mutex_lock(&rdata->rp_mutex); |
390 | ||
4b2164d4 | 391 | rdata->flags |= FC_RP_STARTED; |
370c3bd0 JE |
392 | switch (rdata->rp_state) { |
393 | case RPORT_ST_READY: | |
394 | FC_RPORT_DBG(rdata, "ADISC port\n"); | |
395 | fc_rport_enter_adisc(rdata); | |
396 | break; | |
b4a9c7ed JE |
397 | case RPORT_ST_DELETE: |
398 | FC_RPORT_DBG(rdata, "Restart deleted port\n"); | |
b4a9c7ed | 399 | break; |
370c3bd0 JE |
400 | default: |
401 | FC_RPORT_DBG(rdata, "Login to port\n"); | |
a7b12a27 | 402 | fc_rport_enter_flogi(rdata); |
370c3bd0 JE |
403 | break; |
404 | } | |
42e9a92f RL |
405 | mutex_unlock(&rdata->rp_mutex); |
406 | ||
407 | return 0; | |
408 | } | |
409 | ||
5f7ea3b7 | 410 | /** |
3a3b42bf RL |
411 | * fc_rport_enter_delete() - Schedule a remote port to be deleted |
412 | * @rdata: The remote port to be deleted | |
413 | * @event: The event to report as the reason for deletion | |
5f7ea3b7 JE |
414 | * |
415 | * Locking Note: Called with the rport lock held. | |
416 | * | |
417 | * Allow state change into DELETE only once. | |
418 | * | |
419 | * Call queue_work only if there's no event already pending. | |
420 | * Set the new event so that the old pending event will not occur. | |
421 | * Since we have the mutex, even if fc_rport_work() is already started, | |
422 | * it'll see the new event. | |
423 | */ | |
9fb9d328 | 424 | static void fc_rport_enter_delete(struct fc_rport_priv *rdata, |
5f7ea3b7 JE |
425 | enum fc_rport_event event) |
426 | { | |
5f7ea3b7 JE |
427 | if (rdata->rp_state == RPORT_ST_DELETE) |
428 | return; | |
429 | ||
9fb9d328 | 430 | FC_RPORT_DBG(rdata, "Delete port\n"); |
5f7ea3b7 | 431 | |
9fb9d328 | 432 | fc_rport_state_enter(rdata, RPORT_ST_DELETE); |
5f7ea3b7 JE |
433 | |
434 | if (rdata->event == RPORT_EV_NONE) | |
435 | queue_work(rport_event_queue, &rdata->event_work); | |
436 | rdata->event = event; | |
437 | } | |
438 | ||
42e9a92f | 439 | /** |
3a3b42bf RL |
440 | * fc_rport_logoff() - Logoff and remove a remote port |
441 | * @rdata: The remote port to be logged off of | |
42e9a92f RL |
442 | * |
443 | * Locking Note: Called without the rport lock held. This | |
444 | * function will hold the rport lock, call an _enter_* | |
445 | * function and then unlock the rport. | |
446 | */ | |
9fb9d328 | 447 | int fc_rport_logoff(struct fc_rport_priv *rdata) |
42e9a92f | 448 | { |
42e9a92f RL |
449 | mutex_lock(&rdata->rp_mutex); |
450 | ||
9fb9d328 | 451 | FC_RPORT_DBG(rdata, "Remove port\n"); |
42e9a92f | 452 | |
4b2164d4 | 453 | rdata->flags &= ~FC_RP_STARTED; |
14194054 | 454 | if (rdata->rp_state == RPORT_ST_DELETE) { |
9fb9d328 | 455 | FC_RPORT_DBG(rdata, "Port in Delete state, not removing\n"); |
b4c6f546 AJ |
456 | goto out; |
457 | } | |
4b2164d4 | 458 | fc_rport_enter_logo(rdata); |
42e9a92f RL |
459 | |
460 | /* | |
14194054 | 461 | * Change the state to Delete so that we discard |
42e9a92f RL |
462 | * the response. |
463 | */ | |
9fb9d328 | 464 | fc_rport_enter_delete(rdata, RPORT_EV_STOP); |
b4c6f546 | 465 | out: |
b4a9c7ed | 466 | mutex_unlock(&rdata->rp_mutex); |
42e9a92f RL |
467 | return 0; |
468 | } | |
469 | ||
470 | /** | |
3a3b42bf RL |
471 | * fc_rport_enter_ready() - Transition to the RPORT_ST_READY state |
472 | * @rdata: The remote port that is ready | |
42e9a92f RL |
473 | * |
474 | * Locking Note: The rport lock is expected to be held before calling | |
475 | * this routine. | |
476 | */ | |
9fb9d328 | 477 | static void fc_rport_enter_ready(struct fc_rport_priv *rdata) |
42e9a92f | 478 | { |
9fb9d328 | 479 | fc_rport_state_enter(rdata, RPORT_ST_READY); |
42e9a92f | 480 | |
9fb9d328 | 481 | FC_RPORT_DBG(rdata, "Port is Ready\n"); |
42e9a92f | 482 | |
5f7ea3b7 JE |
483 | if (rdata->event == RPORT_EV_NONE) |
484 | queue_work(rport_event_queue, &rdata->event_work); | |
4c0f62b5 | 485 | rdata->event = RPORT_EV_READY; |
42e9a92f RL |
486 | } |
487 | ||
488 | /** | |
3a3b42bf RL |
489 | * fc_rport_timeout() - Handler for the retry_work timer |
490 | * @work: Handle to the remote port that has timed out | |
42e9a92f RL |
491 | * |
492 | * Locking Note: Called without the rport lock held. This | |
493 | * function will hold the rport lock, call an _enter_* | |
494 | * function and then unlock the rport. | |
495 | */ | |
496 | static void fc_rport_timeout(struct work_struct *work) | |
497 | { | |
ab28f1fd JE |
498 | struct fc_rport_priv *rdata = |
499 | container_of(work, struct fc_rport_priv, retry_work.work); | |
42e9a92f RL |
500 | |
501 | mutex_lock(&rdata->rp_mutex); | |
502 | ||
503 | switch (rdata->rp_state) { | |
a7b12a27 JE |
504 | case RPORT_ST_FLOGI: |
505 | fc_rport_enter_flogi(rdata); | |
506 | break; | |
42e9a92f | 507 | case RPORT_ST_PLOGI: |
9fb9d328 | 508 | fc_rport_enter_plogi(rdata); |
42e9a92f RL |
509 | break; |
510 | case RPORT_ST_PRLI: | |
9fb9d328 | 511 | fc_rport_enter_prli(rdata); |
42e9a92f RL |
512 | break; |
513 | case RPORT_ST_RTV: | |
9fb9d328 | 514 | fc_rport_enter_rtv(rdata); |
42e9a92f | 515 | break; |
370c3bd0 JE |
516 | case RPORT_ST_ADISC: |
517 | fc_rport_enter_adisc(rdata); | |
518 | break; | |
a7b12a27 | 519 | case RPORT_ST_PLOGI_WAIT: |
42e9a92f RL |
520 | case RPORT_ST_READY: |
521 | case RPORT_ST_INIT: | |
14194054 | 522 | case RPORT_ST_DELETE: |
42e9a92f RL |
523 | break; |
524 | } | |
525 | ||
526 | mutex_unlock(&rdata->rp_mutex); | |
42e9a92f RL |
527 | } |
528 | ||
529 | /** | |
34f42a07 | 530 | * fc_rport_error() - Error handler, called once retries have been exhausted |
3a3b42bf RL |
531 | * @rdata: The remote port the error is happened on |
532 | * @fp: The error code encapsulated in a frame pointer | |
42e9a92f | 533 | * |
42e9a92f RL |
534 | * Locking Note: The rport lock is expected to be held before |
535 | * calling this routine | |
536 | */ | |
9fb9d328 | 537 | static void fc_rport_error(struct fc_rport_priv *rdata, struct fc_frame *fp) |
42e9a92f | 538 | { |
9fb9d328 | 539 | FC_RPORT_DBG(rdata, "Error %ld in state %s, retries %d\n", |
cdbe6dfe JE |
540 | IS_ERR(fp) ? -PTR_ERR(fp) : 0, |
541 | fc_rport_state(rdata), rdata->retries); | |
42e9a92f | 542 | |
6755db1c | 543 | switch (rdata->rp_state) { |
a7b12a27 | 544 | case RPORT_ST_FLOGI: |
6755db1c | 545 | case RPORT_ST_PLOGI: |
4b2164d4 | 546 | rdata->flags &= ~FC_RP_STARTED; |
9fb9d328 | 547 | fc_rport_enter_delete(rdata, RPORT_EV_FAILED); |
6755db1c CL |
548 | break; |
549 | case RPORT_ST_RTV: | |
9fb9d328 | 550 | fc_rport_enter_ready(rdata); |
6755db1c | 551 | break; |
370c3bd0 JE |
552 | case RPORT_ST_PRLI: |
553 | case RPORT_ST_ADISC: | |
554 | fc_rport_enter_logo(rdata); | |
555 | break; | |
a7b12a27 | 556 | case RPORT_ST_PLOGI_WAIT: |
14194054 | 557 | case RPORT_ST_DELETE: |
6755db1c CL |
558 | case RPORT_ST_READY: |
559 | case RPORT_ST_INIT: | |
560 | break; | |
42e9a92f RL |
561 | } |
562 | } | |
563 | ||
6755db1c | 564 | /** |
3a3b42bf RL |
565 | * fc_rport_error_retry() - Handler for remote port state retries |
566 | * @rdata: The remote port whose state is to be retried | |
567 | * @fp: The error code encapsulated in a frame pointer | |
6755db1c CL |
568 | * |
569 | * If the error was an exchange timeout retry immediately, | |
570 | * otherwise wait for E_D_TOV. | |
571 | * | |
572 | * Locking Note: The rport lock is expected to be held before | |
573 | * calling this routine | |
574 | */ | |
9fb9d328 JE |
575 | static void fc_rport_error_retry(struct fc_rport_priv *rdata, |
576 | struct fc_frame *fp) | |
6755db1c | 577 | { |
6755db1c CL |
578 | unsigned long delay = FC_DEF_E_D_TOV; |
579 | ||
580 | /* make sure this isn't an FC_EX_CLOSED error, never retry those */ | |
581 | if (PTR_ERR(fp) == -FC_EX_CLOSED) | |
9fb9d328 | 582 | return fc_rport_error(rdata, fp); |
6755db1c | 583 | |
a3666955 | 584 | if (rdata->retries < rdata->local_port->max_rport_retry_count) { |
9fb9d328 JE |
585 | FC_RPORT_DBG(rdata, "Error %ld in state %s, retrying\n", |
586 | PTR_ERR(fp), fc_rport_state(rdata)); | |
6755db1c CL |
587 | rdata->retries++; |
588 | /* no additional delay on exchange timeouts */ | |
589 | if (PTR_ERR(fp) == -FC_EX_TIMEOUT) | |
590 | delay = 0; | |
6755db1c CL |
591 | schedule_delayed_work(&rdata->retry_work, delay); |
592 | return; | |
593 | } | |
594 | ||
9fb9d328 | 595 | return fc_rport_error(rdata, fp); |
6755db1c CL |
596 | } |
597 | ||
42e9a92f | 598 | /** |
a7b12a27 JE |
599 | * fc_rport_login_complete() - Handle parameters and completion of p-mp login. |
600 | * @rdata: The remote port which we logged into or which logged into us. | |
601 | * @fp: The FLOGI or PLOGI request or response frame | |
602 | * | |
603 | * Returns non-zero error if a problem is detected with the frame. | |
604 | * Does not free the frame. | |
605 | * | |
606 | * This is only used in point-to-multipoint mode for FIP currently. | |
607 | */ | |
608 | static int fc_rport_login_complete(struct fc_rport_priv *rdata, | |
609 | struct fc_frame *fp) | |
610 | { | |
611 | struct fc_lport *lport = rdata->local_port; | |
612 | struct fc_els_flogi *flogi; | |
613 | unsigned int e_d_tov; | |
614 | u16 csp_flags; | |
615 | ||
616 | flogi = fc_frame_payload_get(fp, sizeof(*flogi)); | |
617 | if (!flogi) | |
618 | return -EINVAL; | |
619 | ||
620 | csp_flags = ntohs(flogi->fl_csp.sp_features); | |
621 | ||
622 | if (fc_frame_payload_op(fp) == ELS_FLOGI) { | |
623 | if (csp_flags & FC_SP_FT_FPORT) { | |
624 | FC_RPORT_DBG(rdata, "Fabric bit set in FLOGI\n"); | |
625 | return -EINVAL; | |
626 | } | |
627 | } else { | |
628 | ||
629 | /* | |
630 | * E_D_TOV is not valid on an incoming FLOGI request. | |
631 | */ | |
632 | e_d_tov = ntohl(flogi->fl_csp.sp_e_d_tov); | |
633 | if (csp_flags & FC_SP_FT_EDTR) | |
634 | e_d_tov /= 1000000; | |
635 | if (e_d_tov > rdata->e_d_tov) | |
636 | rdata->e_d_tov = e_d_tov; | |
637 | } | |
638 | rdata->maxframe_size = fc_plogi_get_maxframe(flogi, lport->mfs); | |
639 | return 0; | |
640 | } | |
641 | ||
642 | /** | |
643 | * fc_rport_flogi_resp() - Handle response to FLOGI request for p-mp mode | |
644 | * @sp: The sequence that the FLOGI was on | |
645 | * @fp: The FLOGI response frame | |
646 | * @rp_arg: The remote port that received the FLOGI response | |
647 | */ | |
648 | void fc_rport_flogi_resp(struct fc_seq *sp, struct fc_frame *fp, | |
649 | void *rp_arg) | |
650 | { | |
651 | struct fc_rport_priv *rdata = rp_arg; | |
652 | struct fc_lport *lport = rdata->local_port; | |
653 | struct fc_els_flogi *flogi; | |
654 | unsigned int r_a_tov; | |
655 | ||
656 | FC_RPORT_DBG(rdata, "Received a FLOGI %s\n", fc_els_resp_type(fp)); | |
657 | ||
658 | if (fp == ERR_PTR(-FC_EX_CLOSED)) | |
659 | return; | |
660 | ||
661 | mutex_lock(&rdata->rp_mutex); | |
662 | ||
663 | if (rdata->rp_state != RPORT_ST_FLOGI) { | |
664 | FC_RPORT_DBG(rdata, "Received a FLOGI response, but in state " | |
665 | "%s\n", fc_rport_state(rdata)); | |
666 | if (IS_ERR(fp)) | |
667 | goto err; | |
668 | goto out; | |
669 | } | |
670 | ||
671 | if (IS_ERR(fp)) { | |
672 | fc_rport_error(rdata, fp); | |
673 | goto err; | |
674 | } | |
675 | ||
676 | if (fc_frame_payload_op(fp) != ELS_LS_ACC) | |
677 | goto bad; | |
678 | if (fc_rport_login_complete(rdata, fp)) | |
679 | goto bad; | |
680 | ||
681 | flogi = fc_frame_payload_get(fp, sizeof(*flogi)); | |
682 | if (!flogi) | |
683 | goto bad; | |
684 | r_a_tov = ntohl(flogi->fl_csp.sp_r_a_tov); | |
685 | if (r_a_tov > rdata->r_a_tov) | |
686 | rdata->r_a_tov = r_a_tov; | |
687 | ||
688 | if (rdata->ids.port_name < lport->wwpn) | |
689 | fc_rport_enter_plogi(rdata); | |
690 | else | |
691 | fc_rport_state_enter(rdata, RPORT_ST_PLOGI_WAIT); | |
692 | out: | |
693 | fc_frame_free(fp); | |
694 | err: | |
695 | mutex_unlock(&rdata->rp_mutex); | |
696 | kref_put(&rdata->kref, rdata->local_port->tt.rport_destroy); | |
697 | return; | |
698 | bad: | |
699 | FC_RPORT_DBG(rdata, "Bad FLOGI response\n"); | |
700 | fc_rport_error_retry(rdata, fp); | |
701 | goto out; | |
702 | } | |
703 | ||
704 | /** | |
705 | * fc_rport_enter_flogi() - Send a FLOGI request to the remote port for p-mp | |
706 | * @rdata: The remote port to send a FLOGI to | |
707 | * | |
708 | * Locking Note: The rport lock is expected to be held before calling | |
709 | * this routine. | |
710 | */ | |
711 | static void fc_rport_enter_flogi(struct fc_rport_priv *rdata) | |
712 | { | |
713 | struct fc_lport *lport = rdata->local_port; | |
714 | struct fc_frame *fp; | |
715 | ||
716 | if (!lport->point_to_multipoint) | |
717 | return fc_rport_enter_plogi(rdata); | |
718 | ||
719 | FC_RPORT_DBG(rdata, "Entered FLOGI state from %s state\n", | |
720 | fc_rport_state(rdata)); | |
721 | ||
722 | fc_rport_state_enter(rdata, RPORT_ST_FLOGI); | |
723 | ||
724 | fp = fc_frame_alloc(lport, sizeof(struct fc_els_flogi)); | |
725 | if (!fp) | |
726 | return fc_rport_error_retry(rdata, fp); | |
727 | ||
728 | if (!lport->tt.elsct_send(lport, rdata->ids.port_id, fp, ELS_FLOGI, | |
729 | fc_rport_flogi_resp, rdata, | |
730 | 2 * lport->r_a_tov)) | |
731 | fc_rport_error_retry(rdata, NULL); | |
732 | else | |
733 | kref_get(&rdata->kref); | |
734 | } | |
735 | ||
736 | /** | |
737 | * fc_rport_recv_flogi_req() - Handle Fabric Login (FLOGI) request in p-mp mode | |
738 | * @lport: The local port that received the PLOGI request | |
739 | * @sp: The sequence that the PLOGI request was on | |
740 | * @rx_fp: The PLOGI request frame | |
741 | */ | |
742 | static void fc_rport_recv_flogi_req(struct fc_lport *lport, | |
743 | struct fc_seq *sp, struct fc_frame *rx_fp) | |
744 | { | |
745 | struct fc_disc *disc; | |
746 | struct fc_els_flogi *flp; | |
747 | struct fc_rport_priv *rdata; | |
748 | struct fc_frame *fp = rx_fp; | |
a7b12a27 | 749 | struct fc_seq_els_data rjt_data; |
24f089e2 | 750 | u32 sid; |
a7b12a27 JE |
751 | |
752 | rjt_data.fp = NULL; | |
251748a9 | 753 | sid = fc_frame_sid(fp); |
a7b12a27 JE |
754 | |
755 | FC_RPORT_ID_DBG(lport, sid, "Received FLOGI request\n"); | |
756 | ||
757 | disc = &lport->disc; | |
758 | mutex_lock(&disc->disc_mutex); | |
759 | ||
760 | if (!lport->point_to_multipoint) { | |
761 | rjt_data.reason = ELS_RJT_UNSUP; | |
762 | rjt_data.explan = ELS_EXPL_NONE; | |
763 | goto reject; | |
764 | } | |
765 | ||
766 | flp = fc_frame_payload_get(fp, sizeof(*flp)); | |
767 | if (!flp) { | |
768 | rjt_data.reason = ELS_RJT_LOGIC; | |
769 | rjt_data.explan = ELS_EXPL_INV_LEN; | |
770 | goto reject; | |
771 | } | |
772 | ||
773 | rdata = lport->tt.rport_lookup(lport, sid); | |
774 | if (!rdata) { | |
775 | rjt_data.reason = ELS_RJT_FIP; | |
776 | rjt_data.explan = ELS_EXPL_NOT_NEIGHBOR; | |
777 | goto reject; | |
778 | } | |
779 | mutex_lock(&rdata->rp_mutex); | |
780 | ||
781 | FC_RPORT_DBG(rdata, "Received FLOGI in %s state\n", | |
782 | fc_rport_state(rdata)); | |
783 | ||
784 | switch (rdata->rp_state) { | |
785 | case RPORT_ST_INIT: | |
a7b12a27 JE |
786 | case RPORT_ST_DELETE: |
787 | mutex_unlock(&rdata->rp_mutex); | |
788 | rjt_data.reason = ELS_RJT_FIP; | |
789 | rjt_data.explan = ELS_EXPL_NOT_NEIGHBOR; | |
790 | goto reject; | |
791 | case RPORT_ST_FLOGI: | |
792 | case RPORT_ST_PLOGI_WAIT: | |
793 | case RPORT_ST_PLOGI: | |
794 | break; | |
795 | case RPORT_ST_PRLI: | |
796 | case RPORT_ST_RTV: | |
797 | case RPORT_ST_READY: | |
798 | case RPORT_ST_ADISC: | |
799 | /* | |
800 | * Set the remote port to be deleted and to then restart. | |
801 | * This queues work to be sure exchanges are reset. | |
802 | */ | |
803 | fc_rport_enter_delete(rdata, RPORT_EV_LOGO); | |
804 | mutex_unlock(&rdata->rp_mutex); | |
805 | rjt_data.reason = ELS_RJT_BUSY; | |
806 | rjt_data.explan = ELS_EXPL_NONE; | |
807 | goto reject; | |
808 | } | |
809 | if (fc_rport_login_complete(rdata, fp)) { | |
810 | mutex_unlock(&rdata->rp_mutex); | |
811 | rjt_data.reason = ELS_RJT_LOGIC; | |
812 | rjt_data.explan = ELS_EXPL_NONE; | |
813 | goto reject; | |
814 | } | |
a7b12a27 JE |
815 | |
816 | fp = fc_frame_alloc(lport, sizeof(*flp)); | |
817 | if (!fp) | |
818 | goto out; | |
819 | ||
820 | sp = lport->tt.seq_start_next(sp); | |
821 | fc_flogi_fill(lport, fp); | |
822 | flp = fc_frame_payload_get(fp, sizeof(*flp)); | |
823 | flp->fl_cmd = ELS_LS_ACC; | |
824 | ||
24f089e2 JE |
825 | fc_fill_reply_hdr(fp, rx_fp, FC_RCTL_ELS_REP, 0); |
826 | lport->tt.frame_send(lport, fp); | |
a7b12a27 JE |
827 | |
828 | if (rdata->ids.port_name < lport->wwpn) | |
829 | fc_rport_enter_plogi(rdata); | |
830 | else | |
831 | fc_rport_state_enter(rdata, RPORT_ST_PLOGI_WAIT); | |
832 | out: | |
833 | mutex_unlock(&rdata->rp_mutex); | |
834 | mutex_unlock(&disc->disc_mutex); | |
24f089e2 | 835 | fc_frame_free(rx_fp); |
a7b12a27 JE |
836 | return; |
837 | ||
838 | reject: | |
839 | mutex_unlock(&disc->disc_mutex); | |
840 | lport->tt.seq_els_rsp_send(sp, ELS_LS_RJT, &rjt_data); | |
24f089e2 | 841 | fc_frame_free(rx_fp); |
a7b12a27 JE |
842 | } |
843 | ||
844 | /** | |
845 | * fc_rport_plogi_resp() - Handler for ELS PLOGI responses | |
3a3b42bf RL |
846 | * @sp: The sequence the PLOGI is on |
847 | * @fp: The PLOGI response frame | |
848 | * @rdata_arg: The remote port that sent the PLOGI response | |
42e9a92f RL |
849 | * |
850 | * Locking Note: This function will be called without the rport lock | |
851 | * held, but it will lock, call an _enter_* function or fc_rport_error | |
852 | * and then unlock the rport. | |
853 | */ | |
854 | static void fc_rport_plogi_resp(struct fc_seq *sp, struct fc_frame *fp, | |
9fb9d328 | 855 | void *rdata_arg) |
42e9a92f | 856 | { |
9fb9d328 | 857 | struct fc_rport_priv *rdata = rdata_arg; |
42e9a92f | 858 | struct fc_lport *lport = rdata->local_port; |
a29e7646 | 859 | struct fc_els_flogi *plp = NULL; |
42e9a92f RL |
860 | u16 csp_seq; |
861 | u16 cssp_seq; | |
862 | u8 op; | |
863 | ||
864 | mutex_lock(&rdata->rp_mutex); | |
865 | ||
f657d299 | 866 | FC_RPORT_DBG(rdata, "Received a PLOGI %s\n", fc_els_resp_type(fp)); |
42e9a92f RL |
867 | |
868 | if (rdata->rp_state != RPORT_ST_PLOGI) { | |
9fb9d328 JE |
869 | FC_RPORT_DBG(rdata, "Received a PLOGI response, but in state " |
870 | "%s\n", fc_rport_state(rdata)); | |
76f6804e AJ |
871 | if (IS_ERR(fp)) |
872 | goto err; | |
42e9a92f RL |
873 | goto out; |
874 | } | |
875 | ||
76f6804e | 876 | if (IS_ERR(fp)) { |
9fb9d328 | 877 | fc_rport_error_retry(rdata, fp); |
76f6804e AJ |
878 | goto err; |
879 | } | |
880 | ||
42e9a92f RL |
881 | op = fc_frame_payload_op(fp); |
882 | if (op == ELS_LS_ACC && | |
883 | (plp = fc_frame_payload_get(fp, sizeof(*plp))) != NULL) { | |
f211fa51 JE |
884 | rdata->ids.port_name = get_unaligned_be64(&plp->fl_wwpn); |
885 | rdata->ids.node_name = get_unaligned_be64(&plp->fl_wwnn); | |
42e9a92f | 886 | |
a7b12a27 JE |
887 | if (lport->point_to_multipoint) |
888 | fc_rport_login_complete(rdata, fp); | |
42e9a92f RL |
889 | csp_seq = ntohs(plp->fl_csp.sp_tot_seq); |
890 | cssp_seq = ntohs(plp->fl_cssp[3 - 1].cp_con_seq); | |
891 | if (cssp_seq < csp_seq) | |
892 | csp_seq = cssp_seq; | |
893 | rdata->max_seq = csp_seq; | |
f211fa51 | 894 | rdata->maxframe_size = fc_plogi_get_maxframe(plp, lport->mfs); |
3ac6f98f | 895 | fc_rport_enter_prli(rdata); |
42e9a92f | 896 | } else |
9fb9d328 | 897 | fc_rport_error_retry(rdata, fp); |
42e9a92f RL |
898 | |
899 | out: | |
900 | fc_frame_free(fp); | |
901 | err: | |
902 | mutex_unlock(&rdata->rp_mutex); | |
f211fa51 | 903 | kref_put(&rdata->kref, rdata->local_port->tt.rport_destroy); |
42e9a92f RL |
904 | } |
905 | ||
906 | /** | |
3a3b42bf RL |
907 | * fc_rport_enter_plogi() - Send Port Login (PLOGI) request |
908 | * @rdata: The remote port to send a PLOGI to | |
42e9a92f RL |
909 | * |
910 | * Locking Note: The rport lock is expected to be held before calling | |
911 | * this routine. | |
912 | */ | |
9fb9d328 | 913 | static void fc_rport_enter_plogi(struct fc_rport_priv *rdata) |
42e9a92f | 914 | { |
42e9a92f RL |
915 | struct fc_lport *lport = rdata->local_port; |
916 | struct fc_frame *fp; | |
917 | ||
9fb9d328 JE |
918 | FC_RPORT_DBG(rdata, "Port entered PLOGI state from %s state\n", |
919 | fc_rport_state(rdata)); | |
42e9a92f | 920 | |
9fb9d328 | 921 | fc_rport_state_enter(rdata, RPORT_ST_PLOGI); |
42e9a92f | 922 | |
f211fa51 | 923 | rdata->maxframe_size = FC_MIN_MAX_PAYLOAD; |
42e9a92f RL |
924 | fp = fc_frame_alloc(lport, sizeof(struct fc_els_flogi)); |
925 | if (!fp) { | |
a7b12a27 | 926 | FC_RPORT_DBG(rdata, "%s frame alloc failed\n", __func__); |
9fb9d328 | 927 | fc_rport_error_retry(rdata, fp); |
42e9a92f RL |
928 | return; |
929 | } | |
930 | rdata->e_d_tov = lport->e_d_tov; | |
931 | ||
f211fa51 | 932 | if (!lport->tt.elsct_send(lport, rdata->ids.port_id, fp, ELS_PLOGI, |
b94f8951 JE |
933 | fc_rport_plogi_resp, rdata, |
934 | 2 * lport->r_a_tov)) | |
8f550f93 | 935 | fc_rport_error_retry(rdata, NULL); |
42e9a92f | 936 | else |
f211fa51 | 937 | kref_get(&rdata->kref); |
42e9a92f RL |
938 | } |
939 | ||
940 | /** | |
34f42a07 | 941 | * fc_rport_prli_resp() - Process Login (PRLI) response handler |
3a3b42bf RL |
942 | * @sp: The sequence the PRLI response was on |
943 | * @fp: The PRLI response frame | |
944 | * @rdata_arg: The remote port that sent the PRLI response | |
42e9a92f RL |
945 | * |
946 | * Locking Note: This function will be called without the rport lock | |
947 | * held, but it will lock, call an _enter_* function or fc_rport_error | |
948 | * and then unlock the rport. | |
949 | */ | |
950 | static void fc_rport_prli_resp(struct fc_seq *sp, struct fc_frame *fp, | |
9fb9d328 | 951 | void *rdata_arg) |
42e9a92f | 952 | { |
9fb9d328 | 953 | struct fc_rport_priv *rdata = rdata_arg; |
42e9a92f RL |
954 | struct { |
955 | struct fc_els_prli prli; | |
956 | struct fc_els_spp spp; | |
957 | } *pp; | |
958 | u32 roles = FC_RPORT_ROLE_UNKNOWN; | |
959 | u32 fcp_parm = 0; | |
960 | u8 op; | |
618461c0 | 961 | u8 resp_code = 0; |
42e9a92f RL |
962 | |
963 | mutex_lock(&rdata->rp_mutex); | |
964 | ||
f657d299 | 965 | FC_RPORT_DBG(rdata, "Received a PRLI %s\n", fc_els_resp_type(fp)); |
42e9a92f RL |
966 | |
967 | if (rdata->rp_state != RPORT_ST_PRLI) { | |
9fb9d328 JE |
968 | FC_RPORT_DBG(rdata, "Received a PRLI response, but in state " |
969 | "%s\n", fc_rport_state(rdata)); | |
76f6804e AJ |
970 | if (IS_ERR(fp)) |
971 | goto err; | |
42e9a92f RL |
972 | goto out; |
973 | } | |
974 | ||
76f6804e | 975 | if (IS_ERR(fp)) { |
9fb9d328 | 976 | fc_rport_error_retry(rdata, fp); |
76f6804e AJ |
977 | goto err; |
978 | } | |
979 | ||
6bd054cb RL |
980 | /* reinitialize remote port roles */ |
981 | rdata->ids.roles = FC_RPORT_ROLE_UNKNOWN; | |
982 | ||
42e9a92f RL |
983 | op = fc_frame_payload_op(fp); |
984 | if (op == ELS_LS_ACC) { | |
985 | pp = fc_frame_payload_get(fp, sizeof(*pp)); | |
618461c0 BPG |
986 | if (!pp) |
987 | goto out; | |
988 | ||
989 | resp_code = (pp->spp.spp_flags & FC_SPP_RESP_MASK); | |
990 | FC_RPORT_DBG(rdata, "PRLI spp_flags = 0x%x\n", | |
991 | pp->spp.spp_flags); | |
992 | if (resp_code != FC_SPP_RESP_ACK) { | |
993 | if (resp_code == FC_SPP_RESP_CONF) | |
994 | fc_rport_error(rdata, fp); | |
995 | else | |
996 | fc_rport_error_retry(rdata, fp); | |
997 | goto out; | |
42e9a92f | 998 | } |
618461c0 BPG |
999 | if (pp->prli.prli_spp_len < sizeof(pp->spp)) |
1000 | goto out; | |
1001 | ||
1002 | fcp_parm = ntohl(pp->spp.spp_params); | |
1003 | if (fcp_parm & FCP_SPPF_RETRY) | |
1004 | rdata->flags |= FC_RP_FLAGS_RETRY; | |
42e9a92f | 1005 | |
f211fa51 | 1006 | rdata->supported_classes = FC_COS_CLASS3; |
42e9a92f RL |
1007 | if (fcp_parm & FCP_SPPF_INIT_FCN) |
1008 | roles |= FC_RPORT_ROLE_FCP_INITIATOR; | |
1009 | if (fcp_parm & FCP_SPPF_TARG_FCN) | |
1010 | roles |= FC_RPORT_ROLE_FCP_TARGET; | |
1011 | ||
f211fa51 | 1012 | rdata->ids.roles = roles; |
9fb9d328 | 1013 | fc_rport_enter_rtv(rdata); |
42e9a92f RL |
1014 | |
1015 | } else { | |
9fb9d328 | 1016 | FC_RPORT_DBG(rdata, "Bad ELS response for PRLI command\n"); |
292e40b9 | 1017 | fc_rport_error_retry(rdata, fp); |
42e9a92f RL |
1018 | } |
1019 | ||
1020 | out: | |
1021 | fc_frame_free(fp); | |
1022 | err: | |
1023 | mutex_unlock(&rdata->rp_mutex); | |
f211fa51 | 1024 | kref_put(&rdata->kref, rdata->local_port->tt.rport_destroy); |
42e9a92f RL |
1025 | } |
1026 | ||
42e9a92f | 1027 | /** |
3a3b42bf RL |
1028 | * fc_rport_enter_prli() - Send Process Login (PRLI) request |
1029 | * @rdata: The remote port to send the PRLI request to | |
42e9a92f RL |
1030 | * |
1031 | * Locking Note: The rport lock is expected to be held before calling | |
1032 | * this routine. | |
1033 | */ | |
9fb9d328 | 1034 | static void fc_rport_enter_prli(struct fc_rport_priv *rdata) |
42e9a92f | 1035 | { |
42e9a92f RL |
1036 | struct fc_lport *lport = rdata->local_port; |
1037 | struct { | |
1038 | struct fc_els_prli prli; | |
1039 | struct fc_els_spp spp; | |
1040 | } *pp; | |
1041 | struct fc_frame *fp; | |
1042 | ||
3ac6f98f JE |
1043 | /* |
1044 | * If the rport is one of the well known addresses | |
1045 | * we skip PRLI and RTV and go straight to READY. | |
1046 | */ | |
1047 | if (rdata->ids.port_id >= FC_FID_DOM_MGR) { | |
1048 | fc_rport_enter_ready(rdata); | |
1049 | return; | |
1050 | } | |
1051 | ||
9fb9d328 JE |
1052 | FC_RPORT_DBG(rdata, "Port entered PRLI state from %s state\n", |
1053 | fc_rport_state(rdata)); | |
42e9a92f | 1054 | |
9fb9d328 | 1055 | fc_rport_state_enter(rdata, RPORT_ST_PRLI); |
42e9a92f RL |
1056 | |
1057 | fp = fc_frame_alloc(lport, sizeof(*pp)); | |
1058 | if (!fp) { | |
9fb9d328 | 1059 | fc_rport_error_retry(rdata, fp); |
42e9a92f RL |
1060 | return; |
1061 | } | |
1062 | ||
f211fa51 | 1063 | if (!lport->tt.elsct_send(lport, rdata->ids.port_id, fp, ELS_PRLI, |
b94f8951 JE |
1064 | fc_rport_prli_resp, rdata, |
1065 | 2 * lport->r_a_tov)) | |
8f550f93 | 1066 | fc_rport_error_retry(rdata, NULL); |
42e9a92f | 1067 | else |
f211fa51 | 1068 | kref_get(&rdata->kref); |
42e9a92f RL |
1069 | } |
1070 | ||
1071 | /** | |
3a3b42bf RL |
1072 | * fc_rport_els_rtv_resp() - Handler for Request Timeout Value (RTV) responses |
1073 | * @sp: The sequence the RTV was on | |
1074 | * @fp: The RTV response frame | |
1075 | * @rdata_arg: The remote port that sent the RTV response | |
42e9a92f RL |
1076 | * |
1077 | * Many targets don't seem to support this. | |
1078 | * | |
1079 | * Locking Note: This function will be called without the rport lock | |
1080 | * held, but it will lock, call an _enter_* function or fc_rport_error | |
1081 | * and then unlock the rport. | |
1082 | */ | |
1083 | static void fc_rport_rtv_resp(struct fc_seq *sp, struct fc_frame *fp, | |
9fb9d328 | 1084 | void *rdata_arg) |
42e9a92f | 1085 | { |
9fb9d328 | 1086 | struct fc_rport_priv *rdata = rdata_arg; |
42e9a92f RL |
1087 | u8 op; |
1088 | ||
1089 | mutex_lock(&rdata->rp_mutex); | |
1090 | ||
f657d299 | 1091 | FC_RPORT_DBG(rdata, "Received a RTV %s\n", fc_els_resp_type(fp)); |
42e9a92f RL |
1092 | |
1093 | if (rdata->rp_state != RPORT_ST_RTV) { | |
9fb9d328 JE |
1094 | FC_RPORT_DBG(rdata, "Received a RTV response, but in state " |
1095 | "%s\n", fc_rport_state(rdata)); | |
76f6804e AJ |
1096 | if (IS_ERR(fp)) |
1097 | goto err; | |
42e9a92f RL |
1098 | goto out; |
1099 | } | |
1100 | ||
76f6804e | 1101 | if (IS_ERR(fp)) { |
9fb9d328 | 1102 | fc_rport_error(rdata, fp); |
76f6804e AJ |
1103 | goto err; |
1104 | } | |
1105 | ||
42e9a92f RL |
1106 | op = fc_frame_payload_op(fp); |
1107 | if (op == ELS_LS_ACC) { | |
1108 | struct fc_els_rtv_acc *rtv; | |
1109 | u32 toq; | |
1110 | u32 tov; | |
1111 | ||
1112 | rtv = fc_frame_payload_get(fp, sizeof(*rtv)); | |
1113 | if (rtv) { | |
1114 | toq = ntohl(rtv->rtv_toq); | |
1115 | tov = ntohl(rtv->rtv_r_a_tov); | |
1116 | if (tov == 0) | |
1117 | tov = 1; | |
1118 | rdata->r_a_tov = tov; | |
1119 | tov = ntohl(rtv->rtv_e_d_tov); | |
1120 | if (toq & FC_ELS_RTV_EDRES) | |
1121 | tov /= 1000000; | |
1122 | if (tov == 0) | |
1123 | tov = 1; | |
1124 | rdata->e_d_tov = tov; | |
1125 | } | |
1126 | } | |
1127 | ||
9fb9d328 | 1128 | fc_rport_enter_ready(rdata); |
42e9a92f RL |
1129 | |
1130 | out: | |
1131 | fc_frame_free(fp); | |
1132 | err: | |
1133 | mutex_unlock(&rdata->rp_mutex); | |
f211fa51 | 1134 | kref_put(&rdata->kref, rdata->local_port->tt.rport_destroy); |
42e9a92f RL |
1135 | } |
1136 | ||
1137 | /** | |
3a3b42bf RL |
1138 | * fc_rport_enter_rtv() - Send Request Timeout Value (RTV) request |
1139 | * @rdata: The remote port to send the RTV request to | |
42e9a92f RL |
1140 | * |
1141 | * Locking Note: The rport lock is expected to be held before calling | |
1142 | * this routine. | |
1143 | */ | |
9fb9d328 | 1144 | static void fc_rport_enter_rtv(struct fc_rport_priv *rdata) |
42e9a92f RL |
1145 | { |
1146 | struct fc_frame *fp; | |
42e9a92f RL |
1147 | struct fc_lport *lport = rdata->local_port; |
1148 | ||
9fb9d328 JE |
1149 | FC_RPORT_DBG(rdata, "Port entered RTV state from %s state\n", |
1150 | fc_rport_state(rdata)); | |
42e9a92f | 1151 | |
9fb9d328 | 1152 | fc_rport_state_enter(rdata, RPORT_ST_RTV); |
42e9a92f RL |
1153 | |
1154 | fp = fc_frame_alloc(lport, sizeof(struct fc_els_rtv)); | |
1155 | if (!fp) { | |
9fb9d328 | 1156 | fc_rport_error_retry(rdata, fp); |
42e9a92f RL |
1157 | return; |
1158 | } | |
1159 | ||
f211fa51 | 1160 | if (!lport->tt.elsct_send(lport, rdata->ids.port_id, fp, ELS_RTV, |
b94f8951 JE |
1161 | fc_rport_rtv_resp, rdata, |
1162 | 2 * lport->r_a_tov)) | |
8f550f93 | 1163 | fc_rport_error_retry(rdata, NULL); |
42e9a92f | 1164 | else |
f211fa51 | 1165 | kref_get(&rdata->kref); |
42e9a92f RL |
1166 | } |
1167 | ||
079ecd8c JE |
1168 | /** |
1169 | * fc_rport_logo_resp() - Handler for logout (LOGO) responses | |
1170 | * @sp: The sequence the LOGO was on | |
1171 | * @fp: The LOGO response frame | |
1172 | * @lport_arg: The local port | |
1173 | */ | |
1174 | static void fc_rport_logo_resp(struct fc_seq *sp, struct fc_frame *fp, | |
1175 | void *lport_arg) | |
1176 | { | |
1177 | struct fc_lport *lport = lport_arg; | |
1178 | ||
1179 | FC_RPORT_ID_DBG(lport, fc_seq_exch(sp)->did, | |
1180 | "Received a LOGO %s\n", fc_els_resp_type(fp)); | |
1181 | if (IS_ERR(fp)) | |
1182 | return; | |
1183 | fc_frame_free(fp); | |
1184 | } | |
1185 | ||
42e9a92f | 1186 | /** |
3a3b42bf RL |
1187 | * fc_rport_enter_logo() - Send a logout (LOGO) request |
1188 | * @rdata: The remote port to send the LOGO request to | |
42e9a92f RL |
1189 | * |
1190 | * Locking Note: The rport lock is expected to be held before calling | |
1191 | * this routine. | |
1192 | */ | |
9fb9d328 | 1193 | static void fc_rport_enter_logo(struct fc_rport_priv *rdata) |
42e9a92f | 1194 | { |
42e9a92f RL |
1195 | struct fc_lport *lport = rdata->local_port; |
1196 | struct fc_frame *fp; | |
1197 | ||
079ecd8c | 1198 | FC_RPORT_DBG(rdata, "Port sending LOGO from %s state\n", |
9fb9d328 | 1199 | fc_rport_state(rdata)); |
42e9a92f | 1200 | |
42e9a92f | 1201 | fp = fc_frame_alloc(lport, sizeof(struct fc_els_logo)); |
079ecd8c | 1202 | if (!fp) |
42e9a92f | 1203 | return; |
079ecd8c JE |
1204 | (void)lport->tt.elsct_send(lport, rdata->ids.port_id, fp, ELS_LOGO, |
1205 | fc_rport_logo_resp, lport, 0); | |
42e9a92f RL |
1206 | } |
1207 | ||
370c3bd0 | 1208 | /** |
3a3b42bf RL |
1209 | * fc_rport_els_adisc_resp() - Handler for Address Discovery (ADISC) responses |
1210 | * @sp: The sequence the ADISC response was on | |
1211 | * @fp: The ADISC response frame | |
1212 | * @rdata_arg: The remote port that sent the ADISC response | |
370c3bd0 JE |
1213 | * |
1214 | * Locking Note: This function will be called without the rport lock | |
1215 | * held, but it will lock, call an _enter_* function or fc_rport_error | |
1216 | * and then unlock the rport. | |
1217 | */ | |
1218 | static void fc_rport_adisc_resp(struct fc_seq *sp, struct fc_frame *fp, | |
3a3b42bf | 1219 | void *rdata_arg) |
370c3bd0 JE |
1220 | { |
1221 | struct fc_rport_priv *rdata = rdata_arg; | |
1222 | struct fc_els_adisc *adisc; | |
1223 | u8 op; | |
1224 | ||
1225 | mutex_lock(&rdata->rp_mutex); | |
1226 | ||
1227 | FC_RPORT_DBG(rdata, "Received a ADISC response\n"); | |
1228 | ||
1229 | if (rdata->rp_state != RPORT_ST_ADISC) { | |
1230 | FC_RPORT_DBG(rdata, "Received a ADISC resp but in state %s\n", | |
1231 | fc_rport_state(rdata)); | |
1232 | if (IS_ERR(fp)) | |
1233 | goto err; | |
1234 | goto out; | |
1235 | } | |
1236 | ||
1237 | if (IS_ERR(fp)) { | |
1238 | fc_rport_error(rdata, fp); | |
1239 | goto err; | |
1240 | } | |
1241 | ||
1242 | /* | |
1243 | * If address verification failed. Consider us logged out of the rport. | |
1244 | * Since the rport is still in discovery, we want to be | |
1245 | * logged in, so go to PLOGI state. Otherwise, go back to READY. | |
1246 | */ | |
1247 | op = fc_frame_payload_op(fp); | |
1248 | adisc = fc_frame_payload_get(fp, sizeof(*adisc)); | |
1249 | if (op != ELS_LS_ACC || !adisc || | |
1250 | ntoh24(adisc->adisc_port_id) != rdata->ids.port_id || | |
1251 | get_unaligned_be64(&adisc->adisc_wwpn) != rdata->ids.port_name || | |
1252 | get_unaligned_be64(&adisc->adisc_wwnn) != rdata->ids.node_name) { | |
1253 | FC_RPORT_DBG(rdata, "ADISC error or mismatch\n"); | |
a7b12a27 | 1254 | fc_rport_enter_flogi(rdata); |
370c3bd0 JE |
1255 | } else { |
1256 | FC_RPORT_DBG(rdata, "ADISC OK\n"); | |
1257 | fc_rport_enter_ready(rdata); | |
1258 | } | |
1259 | out: | |
1260 | fc_frame_free(fp); | |
1261 | err: | |
1262 | mutex_unlock(&rdata->rp_mutex); | |
1263 | kref_put(&rdata->kref, rdata->local_port->tt.rport_destroy); | |
1264 | } | |
1265 | ||
1266 | /** | |
3a3b42bf RL |
1267 | * fc_rport_enter_adisc() - Send Address Discover (ADISC) request |
1268 | * @rdata: The remote port to send the ADISC request to | |
370c3bd0 JE |
1269 | * |
1270 | * Locking Note: The rport lock is expected to be held before calling | |
1271 | * this routine. | |
1272 | */ | |
1273 | static void fc_rport_enter_adisc(struct fc_rport_priv *rdata) | |
1274 | { | |
1275 | struct fc_lport *lport = rdata->local_port; | |
1276 | struct fc_frame *fp; | |
1277 | ||
1278 | FC_RPORT_DBG(rdata, "sending ADISC from %s state\n", | |
1279 | fc_rport_state(rdata)); | |
1280 | ||
1281 | fc_rport_state_enter(rdata, RPORT_ST_ADISC); | |
1282 | ||
1283 | fp = fc_frame_alloc(lport, sizeof(struct fc_els_adisc)); | |
1284 | if (!fp) { | |
1285 | fc_rport_error_retry(rdata, fp); | |
1286 | return; | |
1287 | } | |
1288 | if (!lport->tt.elsct_send(lport, rdata->ids.port_id, fp, ELS_ADISC, | |
b94f8951 JE |
1289 | fc_rport_adisc_resp, rdata, |
1290 | 2 * lport->r_a_tov)) | |
8f550f93 | 1291 | fc_rport_error_retry(rdata, NULL); |
370c3bd0 JE |
1292 | else |
1293 | kref_get(&rdata->kref); | |
1294 | } | |
1295 | ||
8abbe3a4 | 1296 | /** |
3a3b42bf RL |
1297 | * fc_rport_recv_adisc_req() - Handler for Address Discovery (ADISC) requests |
1298 | * @rdata: The remote port that sent the ADISC request | |
1299 | * @sp: The sequence the ADISC request was on | |
1300 | * @in_fp: The ADISC request frame | |
8abbe3a4 JE |
1301 | * |
1302 | * Locking Note: Called with the lport and rport locks held. | |
1303 | */ | |
1304 | static void fc_rport_recv_adisc_req(struct fc_rport_priv *rdata, | |
1305 | struct fc_seq *sp, struct fc_frame *in_fp) | |
1306 | { | |
1307 | struct fc_lport *lport = rdata->local_port; | |
1308 | struct fc_frame *fp; | |
8abbe3a4 JE |
1309 | struct fc_els_adisc *adisc; |
1310 | struct fc_seq_els_data rjt_data; | |
8abbe3a4 JE |
1311 | |
1312 | FC_RPORT_DBG(rdata, "Received ADISC request\n"); | |
1313 | ||
1314 | adisc = fc_frame_payload_get(in_fp, sizeof(*adisc)); | |
1315 | if (!adisc) { | |
1316 | rjt_data.fp = NULL; | |
1317 | rjt_data.reason = ELS_RJT_PROT; | |
1318 | rjt_data.explan = ELS_EXPL_INV_LEN; | |
1319 | lport->tt.seq_els_rsp_send(sp, ELS_LS_RJT, &rjt_data); | |
1320 | goto drop; | |
1321 | } | |
1322 | ||
1323 | fp = fc_frame_alloc(lport, sizeof(*adisc)); | |
1324 | if (!fp) | |
1325 | goto drop; | |
1326 | fc_adisc_fill(lport, fp); | |
1327 | adisc = fc_frame_payload_get(fp, sizeof(*adisc)); | |
1328 | adisc->adisc_cmd = ELS_LS_ACC; | |
24f089e2 JE |
1329 | fc_fill_reply_hdr(fp, in_fp, FC_RCTL_ELS_REP, 0); |
1330 | lport->tt.frame_send(lport, fp); | |
8abbe3a4 JE |
1331 | drop: |
1332 | fc_frame_free(in_fp); | |
1333 | } | |
1334 | ||
63e27fb8 YZ |
1335 | /** |
1336 | * fc_rport_recv_rls_req() - Handle received Read Link Status request | |
1337 | * @rdata: The remote port that sent the RLS request | |
1338 | * @sp: The sequence that the RLS was on | |
1339 | * @rx_fp: The PRLI request frame | |
1340 | * | |
1341 | * Locking Note: The rport lock is expected to be held before calling | |
1342 | * this function. | |
1343 | */ | |
1344 | static void fc_rport_recv_rls_req(struct fc_rport_priv *rdata, | |
1345 | struct fc_seq *sp, struct fc_frame *rx_fp) | |
1346 | ||
1347 | { | |
1348 | struct fc_lport *lport = rdata->local_port; | |
1349 | struct fc_frame *fp; | |
63e27fb8 YZ |
1350 | struct fc_els_rls *rls; |
1351 | struct fc_els_rls_resp *rsp; | |
1352 | struct fc_els_lesb *lesb; | |
1353 | struct fc_seq_els_data rjt_data; | |
1354 | struct fc_host_statistics *hst; | |
63e27fb8 YZ |
1355 | |
1356 | FC_RPORT_DBG(rdata, "Received RLS request while in state %s\n", | |
1357 | fc_rport_state(rdata)); | |
1358 | ||
1359 | rls = fc_frame_payload_get(rx_fp, sizeof(*rls)); | |
1360 | if (!rls) { | |
1361 | rjt_data.reason = ELS_RJT_PROT; | |
1362 | rjt_data.explan = ELS_EXPL_INV_LEN; | |
1363 | goto out_rjt; | |
1364 | } | |
1365 | ||
1366 | fp = fc_frame_alloc(lport, sizeof(*rsp)); | |
1367 | if (!fp) { | |
1368 | rjt_data.reason = ELS_RJT_UNAB; | |
1369 | rjt_data.explan = ELS_EXPL_INSUF_RES; | |
1370 | goto out_rjt; | |
1371 | } | |
1372 | ||
1373 | rsp = fc_frame_payload_get(fp, sizeof(*rsp)); | |
1374 | memset(rsp, 0, sizeof(*rsp)); | |
1375 | rsp->rls_cmd = ELS_LS_ACC; | |
1376 | lesb = &rsp->rls_lesb; | |
1377 | if (lport->tt.get_lesb) { | |
1378 | /* get LESB from LLD if it supports it */ | |
1379 | lport->tt.get_lesb(lport, lesb); | |
1380 | } else { | |
1381 | fc_get_host_stats(lport->host); | |
1382 | hst = &lport->host_stats; | |
1383 | lesb->lesb_link_fail = htonl(hst->link_failure_count); | |
1384 | lesb->lesb_sync_loss = htonl(hst->loss_of_sync_count); | |
1385 | lesb->lesb_sig_loss = htonl(hst->loss_of_signal_count); | |
1386 | lesb->lesb_prim_err = htonl(hst->prim_seq_protocol_err_count); | |
1387 | lesb->lesb_inv_word = htonl(hst->invalid_tx_word_count); | |
1388 | lesb->lesb_inv_crc = htonl(hst->invalid_crc_count); | |
1389 | } | |
1390 | ||
24f089e2 JE |
1391 | fc_fill_reply_hdr(fp, rx_fp, FC_RCTL_ELS_REP, 0); |
1392 | lport->tt.frame_send(lport, fp); | |
63e27fb8 YZ |
1393 | goto out; |
1394 | ||
1395 | out_rjt: | |
1396 | rjt_data.fp = NULL; | |
1397 | lport->tt.seq_els_rsp_send(sp, ELS_LS_RJT, &rjt_data); | |
1398 | out: | |
1399 | fc_frame_free(rx_fp); | |
1400 | } | |
1401 | ||
42e9a92f | 1402 | /** |
3a3b42bf RL |
1403 | * fc_rport_recv_els_req() - Handler for validated ELS requests |
1404 | * @lport: The local port that received the ELS request | |
1405 | * @sp: The sequence that the ELS request was on | |
1406 | * @fp: The ELS request frame | |
83fe6a93 JE |
1407 | * |
1408 | * Handle incoming ELS requests that require port login. | |
1409 | * The ELS opcode has already been validated by the caller. | |
42e9a92f | 1410 | * |
131203a1 | 1411 | * Locking Note: Called with the lport lock held. |
42e9a92f | 1412 | */ |
83fe6a93 JE |
1413 | static void fc_rport_recv_els_req(struct fc_lport *lport, |
1414 | struct fc_seq *sp, struct fc_frame *fp) | |
42e9a92f | 1415 | { |
131203a1 | 1416 | struct fc_rport_priv *rdata; |
42e9a92f | 1417 | struct fc_seq_els_data els_data; |
42e9a92f | 1418 | |
42e9a92f | 1419 | els_data.fp = NULL; |
83fe6a93 JE |
1420 | els_data.reason = ELS_RJT_UNAB; |
1421 | els_data.explan = ELS_EXPL_PLOGI_REQD; | |
3ac6f98f | 1422 | |
25b37b98 | 1423 | mutex_lock(&lport->disc.disc_mutex); |
251748a9 | 1424 | rdata = lport->tt.rport_lookup(lport, fc_frame_sid(fp)); |
131203a1 | 1425 | if (!rdata) { |
25b37b98 | 1426 | mutex_unlock(&lport->disc.disc_mutex); |
83fe6a93 | 1427 | goto reject; |
131203a1 JE |
1428 | } |
1429 | mutex_lock(&rdata->rp_mutex); | |
25b37b98 | 1430 | mutex_unlock(&lport->disc.disc_mutex); |
131203a1 | 1431 | |
83fe6a93 JE |
1432 | switch (rdata->rp_state) { |
1433 | case RPORT_ST_PRLI: | |
1434 | case RPORT_ST_RTV: | |
1435 | case RPORT_ST_READY: | |
370c3bd0 | 1436 | case RPORT_ST_ADISC: |
83fe6a93 JE |
1437 | break; |
1438 | default: | |
1439 | mutex_unlock(&rdata->rp_mutex); | |
1440 | goto reject; | |
1441 | } | |
1442 | ||
1443 | switch (fc_frame_payload_op(fp)) { | |
131203a1 JE |
1444 | case ELS_PRLI: |
1445 | fc_rport_recv_prli_req(rdata, sp, fp); | |
1446 | break; | |
1447 | case ELS_PRLO: | |
1448 | fc_rport_recv_prlo_req(rdata, sp, fp); | |
1449 | break; | |
8abbe3a4 JE |
1450 | case ELS_ADISC: |
1451 | fc_rport_recv_adisc_req(rdata, sp, fp); | |
1452 | break; | |
131203a1 JE |
1453 | case ELS_RRQ: |
1454 | els_data.fp = fp; | |
1455 | lport->tt.seq_els_rsp_send(sp, ELS_RRQ, &els_data); | |
1456 | break; | |
1457 | case ELS_REC: | |
1458 | els_data.fp = fp; | |
1459 | lport->tt.seq_els_rsp_send(sp, ELS_REC, &els_data); | |
1460 | break; | |
63e27fb8 YZ |
1461 | case ELS_RLS: |
1462 | fc_rport_recv_rls_req(rdata, sp, fp); | |
1463 | break; | |
131203a1 | 1464 | default: |
83fe6a93 | 1465 | fc_frame_free(fp); /* can't happen */ |
131203a1 | 1466 | break; |
42e9a92f RL |
1467 | } |
1468 | ||
1469 | mutex_unlock(&rdata->rp_mutex); | |
83fe6a93 JE |
1470 | return; |
1471 | ||
1472 | reject: | |
1473 | lport->tt.seq_els_rsp_send(sp, ELS_LS_RJT, &els_data); | |
1474 | fc_frame_free(fp); | |
1475 | } | |
1476 | ||
1477 | /** | |
3a3b42bf RL |
1478 | * fc_rport_recv_req() - Handler for requests |
1479 | * @sp: The sequence the request was on | |
1480 | * @fp: The request frame | |
1481 | * @lport: The local port that received the request | |
83fe6a93 JE |
1482 | * |
1483 | * Locking Note: Called with the lport lock held. | |
1484 | */ | |
1485 | void fc_rport_recv_req(struct fc_seq *sp, struct fc_frame *fp, | |
1486 | struct fc_lport *lport) | |
1487 | { | |
1488 | struct fc_seq_els_data els_data; | |
1489 | ||
1490 | /* | |
a7b12a27 | 1491 | * Handle FLOGI, PLOGI and LOGO requests separately, since they |
83fe6a93 JE |
1492 | * don't require prior login. |
1493 | * Check for unsupported opcodes first and reject them. | |
1494 | * For some ops, it would be incorrect to reject with "PLOGI required". | |
1495 | */ | |
1496 | switch (fc_frame_payload_op(fp)) { | |
a7b12a27 JE |
1497 | case ELS_FLOGI: |
1498 | fc_rport_recv_flogi_req(lport, sp, fp); | |
1499 | break; | |
83fe6a93 JE |
1500 | case ELS_PLOGI: |
1501 | fc_rport_recv_plogi_req(lport, sp, fp); | |
1502 | break; | |
1503 | case ELS_LOGO: | |
1504 | fc_rport_recv_logo_req(lport, sp, fp); | |
1505 | break; | |
1506 | case ELS_PRLI: | |
1507 | case ELS_PRLO: | |
8abbe3a4 | 1508 | case ELS_ADISC: |
83fe6a93 JE |
1509 | case ELS_RRQ: |
1510 | case ELS_REC: | |
63e27fb8 | 1511 | case ELS_RLS: |
83fe6a93 JE |
1512 | fc_rport_recv_els_req(lport, sp, fp); |
1513 | break; | |
1514 | default: | |
1515 | fc_frame_free(fp); | |
1516 | els_data.fp = NULL; | |
1517 | els_data.reason = ELS_RJT_UNSUP; | |
1518 | els_data.explan = ELS_EXPL_NONE; | |
1519 | lport->tt.seq_els_rsp_send(sp, ELS_LS_RJT, &els_data); | |
1520 | break; | |
1521 | } | |
42e9a92f RL |
1522 | } |
1523 | ||
1524 | /** | |
3a3b42bf RL |
1525 | * fc_rport_recv_plogi_req() - Handler for Port Login (PLOGI) requests |
1526 | * @lport: The local port that received the PLOGI request | |
1527 | * @sp: The sequence that the PLOGI request was on | |
1528 | * @rx_fp: The PLOGI request frame | |
42e9a92f | 1529 | * |
3ac6f98f | 1530 | * Locking Note: The rport lock is held before calling this function. |
42e9a92f | 1531 | */ |
3ac6f98f | 1532 | static void fc_rport_recv_plogi_req(struct fc_lport *lport, |
42e9a92f RL |
1533 | struct fc_seq *sp, struct fc_frame *rx_fp) |
1534 | { | |
3ac6f98f JE |
1535 | struct fc_disc *disc; |
1536 | struct fc_rport_priv *rdata; | |
42e9a92f | 1537 | struct fc_frame *fp = rx_fp; |
42e9a92f RL |
1538 | struct fc_els_flogi *pl; |
1539 | struct fc_seq_els_data rjt_data; | |
24f089e2 | 1540 | u32 sid; |
42e9a92f | 1541 | |
3ac6f98f | 1542 | rjt_data.fp = NULL; |
251748a9 | 1543 | sid = fc_frame_sid(fp); |
42e9a92f | 1544 | |
3ac6f98f | 1545 | FC_RPORT_ID_DBG(lport, sid, "Received PLOGI request\n"); |
42e9a92f | 1546 | |
42e9a92f RL |
1547 | pl = fc_frame_payload_get(fp, sizeof(*pl)); |
1548 | if (!pl) { | |
3ac6f98f JE |
1549 | FC_RPORT_ID_DBG(lport, sid, "Received PLOGI too short\n"); |
1550 | rjt_data.reason = ELS_RJT_PROT; | |
1551 | rjt_data.explan = ELS_EXPL_INV_LEN; | |
1552 | goto reject; | |
42e9a92f | 1553 | } |
3ac6f98f JE |
1554 | |
1555 | disc = &lport->disc; | |
1556 | mutex_lock(&disc->disc_mutex); | |
1557 | rdata = lport->tt.rport_create(lport, sid); | |
1558 | if (!rdata) { | |
1559 | mutex_unlock(&disc->disc_mutex); | |
1560 | rjt_data.reason = ELS_RJT_UNAB; | |
1561 | rjt_data.explan = ELS_EXPL_INSUF_RES; | |
1562 | goto reject; | |
1563 | } | |
1564 | ||
1565 | mutex_lock(&rdata->rp_mutex); | |
1566 | mutex_unlock(&disc->disc_mutex); | |
1567 | ||
1568 | rdata->ids.port_name = get_unaligned_be64(&pl->fl_wwpn); | |
1569 | rdata->ids.node_name = get_unaligned_be64(&pl->fl_wwnn); | |
42e9a92f RL |
1570 | |
1571 | /* | |
3ac6f98f | 1572 | * If the rport was just created, possibly due to the incoming PLOGI, |
42e9a92f RL |
1573 | * set the state appropriately and accept the PLOGI. |
1574 | * | |
1575 | * If we had also sent a PLOGI, and if the received PLOGI is from a | |
1576 | * higher WWPN, we accept it, otherwise an LS_RJT is sent with reason | |
1577 | * "command already in progress". | |
1578 | * | |
1579 | * XXX TBD: If the session was ready before, the PLOGI should result in | |
1580 | * all outstanding exchanges being reset. | |
1581 | */ | |
1582 | switch (rdata->rp_state) { | |
1583 | case RPORT_ST_INIT: | |
3ac6f98f | 1584 | FC_RPORT_DBG(rdata, "Received PLOGI in INIT state\n"); |
42e9a92f | 1585 | break; |
a7b12a27 JE |
1586 | case RPORT_ST_PLOGI_WAIT: |
1587 | FC_RPORT_DBG(rdata, "Received PLOGI in PLOGI_WAIT state\n"); | |
1588 | break; | |
42e9a92f | 1589 | case RPORT_ST_PLOGI: |
3ac6f98f JE |
1590 | FC_RPORT_DBG(rdata, "Received PLOGI in PLOGI state\n"); |
1591 | if (rdata->ids.port_name < lport->wwpn) { | |
1592 | mutex_unlock(&rdata->rp_mutex); | |
1593 | rjt_data.reason = ELS_RJT_INPROG; | |
1594 | rjt_data.explan = ELS_EXPL_NONE; | |
1595 | goto reject; | |
1596 | } | |
42e9a92f RL |
1597 | break; |
1598 | case RPORT_ST_PRLI: | |
b4a9c7ed | 1599 | case RPORT_ST_RTV: |
42e9a92f | 1600 | case RPORT_ST_READY: |
370c3bd0 JE |
1601 | case RPORT_ST_ADISC: |
1602 | FC_RPORT_DBG(rdata, "Received PLOGI in logged-in state %d " | |
1603 | "- ignored for now\n", rdata->rp_state); | |
1604 | /* XXX TBD - should reset */ | |
42e9a92f | 1605 | break; |
a7b12a27 | 1606 | case RPORT_ST_FLOGI: |
14194054 | 1607 | case RPORT_ST_DELETE: |
b4a9c7ed JE |
1608 | FC_RPORT_DBG(rdata, "Received PLOGI in state %s - send busy\n", |
1609 | fc_rport_state(rdata)); | |
1610 | mutex_unlock(&rdata->rp_mutex); | |
1611 | rjt_data.reason = ELS_RJT_BUSY; | |
1612 | rjt_data.explan = ELS_EXPL_NONE; | |
1613 | goto reject; | |
42e9a92f RL |
1614 | } |
1615 | ||
3ac6f98f JE |
1616 | /* |
1617 | * Get session payload size from incoming PLOGI. | |
1618 | */ | |
1619 | rdata->maxframe_size = fc_plogi_get_maxframe(pl, lport->mfs); | |
3ac6f98f JE |
1620 | |
1621 | /* | |
1622 | * Send LS_ACC. If this fails, the originator should retry. | |
1623 | */ | |
3ac6f98f JE |
1624 | fp = fc_frame_alloc(lport, sizeof(*pl)); |
1625 | if (!fp) | |
1626 | goto out; | |
1627 | ||
1628 | fc_plogi_fill(lport, fp, ELS_LS_ACC); | |
24f089e2 JE |
1629 | fc_fill_reply_hdr(fp, rx_fp, FC_RCTL_ELS_REP, 0); |
1630 | lport->tt.frame_send(lport, fp); | |
3ac6f98f JE |
1631 | fc_rport_enter_prli(rdata); |
1632 | out: | |
1633 | mutex_unlock(&rdata->rp_mutex); | |
24f089e2 | 1634 | fc_frame_free(rx_fp); |
3ac6f98f JE |
1635 | return; |
1636 | ||
1637 | reject: | |
1638 | lport->tt.seq_els_rsp_send(sp, ELS_LS_RJT, &rjt_data); | |
1639 | fc_frame_free(fp); | |
42e9a92f RL |
1640 | } |
1641 | ||
1642 | /** | |
3a3b42bf RL |
1643 | * fc_rport_recv_prli_req() - Handler for process login (PRLI) requests |
1644 | * @rdata: The remote port that sent the PRLI request | |
1645 | * @sp: The sequence that the PRLI was on | |
1646 | * @rx_fp: The PRLI request frame | |
42e9a92f RL |
1647 | * |
1648 | * Locking Note: The rport lock is exected to be held before calling | |
1649 | * this function. | |
1650 | */ | |
9fb9d328 | 1651 | static void fc_rport_recv_prli_req(struct fc_rport_priv *rdata, |
42e9a92f RL |
1652 | struct fc_seq *sp, struct fc_frame *rx_fp) |
1653 | { | |
42e9a92f | 1654 | struct fc_lport *lport = rdata->local_port; |
42e9a92f | 1655 | struct fc_frame *fp; |
42e9a92f RL |
1656 | struct { |
1657 | struct fc_els_prli prli; | |
1658 | struct fc_els_spp spp; | |
1659 | } *pp; | |
1660 | struct fc_els_spp *rspp; /* request service param page */ | |
1661 | struct fc_els_spp *spp; /* response spp */ | |
1662 | unsigned int len; | |
1663 | unsigned int plen; | |
42e9a92f RL |
1664 | enum fc_els_spp_resp resp; |
1665 | struct fc_seq_els_data rjt_data; | |
42e9a92f RL |
1666 | u32 fcp_parm; |
1667 | u32 roles = FC_RPORT_ROLE_UNKNOWN; | |
42e9a92f | 1668 | |
a2f6a024 | 1669 | rjt_data.fp = NULL; |
9fb9d328 JE |
1670 | FC_RPORT_DBG(rdata, "Received PRLI request while in state %s\n", |
1671 | fc_rport_state(rdata)); | |
42e9a92f | 1672 | |
251748a9 | 1673 | len = fr_len(rx_fp) - sizeof(struct fc_frame_header); |
42e9a92f | 1674 | pp = fc_frame_payload_get(rx_fp, sizeof(*pp)); |
a2f6a024 JE |
1675 | if (!pp) |
1676 | goto reject_len; | |
1677 | plen = ntohs(pp->prli.prli_len); | |
1678 | if ((plen % 4) != 0 || plen > len || plen < 16) | |
1679 | goto reject_len; | |
1680 | if (plen < len) | |
1681 | len = plen; | |
1682 | plen = pp->prli.prli_spp_len; | |
1683 | if ((plen % 4) != 0 || plen < sizeof(*spp) || | |
1684 | plen > len || len < sizeof(*pp) || plen < 12) | |
1685 | goto reject_len; | |
1686 | rspp = &pp->spp; | |
1687 | ||
1688 | fp = fc_frame_alloc(lport, len); | |
1689 | if (!fp) { | |
1690 | rjt_data.reason = ELS_RJT_UNAB; | |
1691 | rjt_data.explan = ELS_EXPL_INSUF_RES; | |
1692 | goto reject; | |
42e9a92f | 1693 | } |
a2f6a024 JE |
1694 | pp = fc_frame_payload_get(fp, len); |
1695 | WARN_ON(!pp); | |
1696 | memset(pp, 0, len); | |
1697 | pp->prli.prli_cmd = ELS_LS_ACC; | |
1698 | pp->prli.prli_spp_len = plen; | |
1699 | pp->prli.prli_len = htons(len); | |
1700 | len -= sizeof(struct fc_els_prli); | |
42e9a92f | 1701 | |
a2f6a024 JE |
1702 | /* reinitialize remote port roles */ |
1703 | rdata->ids.roles = FC_RPORT_ROLE_UNKNOWN; | |
42e9a92f | 1704 | |
a2f6a024 JE |
1705 | /* |
1706 | * Go through all the service parameter pages and build | |
1707 | * response. If plen indicates longer SPP than standard, | |
1708 | * use that. The entire response has been pre-cleared above. | |
1709 | */ | |
1710 | spp = &pp->spp; | |
1711 | while (len >= plen) { | |
1712 | spp->spp_type = rspp->spp_type; | |
1713 | spp->spp_type_ext = rspp->spp_type_ext; | |
1714 | spp->spp_flags = rspp->spp_flags & FC_SPP_EST_IMG_PAIR; | |
1715 | resp = FC_SPP_RESP_ACK; | |
1716 | ||
1717 | switch (rspp->spp_type) { | |
1718 | case 0: /* common to all FC-4 types */ | |
42e9a92f | 1719 | break; |
a2f6a024 JE |
1720 | case FC_TYPE_FCP: |
1721 | fcp_parm = ntohl(rspp->spp_params); | |
1722 | if (fcp_parm & FCP_SPPF_RETRY) | |
1723 | rdata->flags |= FC_RP_FLAGS_RETRY; | |
1724 | rdata->supported_classes = FC_COS_CLASS3; | |
1725 | if (fcp_parm & FCP_SPPF_INIT_FCN) | |
1726 | roles |= FC_RPORT_ROLE_FCP_INITIATOR; | |
1727 | if (fcp_parm & FCP_SPPF_TARG_FCN) | |
1728 | roles |= FC_RPORT_ROLE_FCP_TARGET; | |
1729 | rdata->ids.roles = roles; | |
1730 | ||
1731 | spp->spp_params = htonl(lport->service_params); | |
42e9a92f RL |
1732 | break; |
1733 | default: | |
a2f6a024 | 1734 | resp = FC_SPP_RESP_INVL; |
42e9a92f RL |
1735 | break; |
1736 | } | |
a2f6a024 JE |
1737 | spp->spp_flags |= resp; |
1738 | len -= plen; | |
1739 | rspp = (struct fc_els_spp *)((char *)rspp + plen); | |
1740 | spp = (struct fc_els_spp *)((char *)spp + plen); | |
1741 | } | |
1742 | ||
1743 | /* | |
1744 | * Send LS_ACC. If this fails, the originator should retry. | |
1745 | */ | |
24f089e2 JE |
1746 | fc_fill_reply_hdr(fp, rx_fp, FC_RCTL_ELS_REP, 0); |
1747 | lport->tt.frame_send(lport, fp); | |
a2f6a024 JE |
1748 | |
1749 | switch (rdata->rp_state) { | |
1750 | case RPORT_ST_PRLI: | |
1751 | fc_rport_enter_ready(rdata); | |
1752 | break; | |
1753 | default: | |
1754 | break; | |
42e9a92f | 1755 | } |
a2f6a024 JE |
1756 | goto drop; |
1757 | ||
1758 | reject_len: | |
1759 | rjt_data.reason = ELS_RJT_PROT; | |
1760 | rjt_data.explan = ELS_EXPL_INV_LEN; | |
1761 | reject: | |
1762 | lport->tt.seq_els_rsp_send(sp, ELS_LS_RJT, &rjt_data); | |
1763 | drop: | |
42e9a92f RL |
1764 | fc_frame_free(rx_fp); |
1765 | } | |
1766 | ||
1767 | /** | |
3a3b42bf RL |
1768 | * fc_rport_recv_prlo_req() - Handler for process logout (PRLO) requests |
1769 | * @rdata: The remote port that sent the PRLO request | |
1770 | * @sp: The sequence that the PRLO was on | |
f8fc6c2c | 1771 | * @rx_fp: The PRLO request frame |
42e9a92f RL |
1772 | * |
1773 | * Locking Note: The rport lock is exected to be held before calling | |
1774 | * this function. | |
1775 | */ | |
9fb9d328 JE |
1776 | static void fc_rport_recv_prlo_req(struct fc_rport_priv *rdata, |
1777 | struct fc_seq *sp, | |
f8fc6c2c | 1778 | struct fc_frame *rx_fp) |
42e9a92f | 1779 | { |
42e9a92f | 1780 | struct fc_lport *lport = rdata->local_port; |
f8fc6c2c BPG |
1781 | struct fc_exch *ep; |
1782 | struct fc_frame *fp; | |
1783 | struct { | |
1784 | struct fc_els_prlo prlo; | |
1785 | struct fc_els_spp spp; | |
1786 | } *pp; | |
1787 | struct fc_els_spp *rspp; /* request service param page */ | |
1788 | struct fc_els_spp *spp; /* response spp */ | |
1789 | unsigned int len; | |
1790 | unsigned int plen; | |
42e9a92f RL |
1791 | struct fc_seq_els_data rjt_data; |
1792 | ||
f8fc6c2c | 1793 | rjt_data.fp = NULL; |
42e9a92f | 1794 | |
9fb9d328 JE |
1795 | FC_RPORT_DBG(rdata, "Received PRLO request while in state %s\n", |
1796 | fc_rport_state(rdata)); | |
42e9a92f | 1797 | |
251748a9 | 1798 | len = fr_len(rx_fp) - sizeof(struct fc_frame_header); |
f8fc6c2c BPG |
1799 | pp = fc_frame_payload_get(rx_fp, sizeof(*pp)); |
1800 | if (!pp) | |
1801 | goto reject_len; | |
1802 | plen = ntohs(pp->prlo.prlo_len); | |
1803 | if (plen != 20) | |
1804 | goto reject_len; | |
1805 | if (plen < len) | |
1806 | len = plen; | |
1807 | ||
1808 | rspp = &pp->spp; | |
1809 | ||
1810 | fp = fc_frame_alloc(lport, len); | |
1811 | if (!fp) { | |
1812 | rjt_data.reason = ELS_RJT_UNAB; | |
1813 | rjt_data.explan = ELS_EXPL_INSUF_RES; | |
1814 | goto reject; | |
1815 | } | |
1816 | ||
1817 | sp = lport->tt.seq_start_next(sp); | |
1818 | WARN_ON(!sp); | |
1819 | pp = fc_frame_payload_get(fp, len); | |
1820 | WARN_ON(!pp); | |
1821 | memset(pp, 0, len); | |
1822 | pp->prlo.prlo_cmd = ELS_LS_ACC; | |
1823 | pp->prlo.prlo_obs = 0x10; | |
1824 | pp->prlo.prlo_len = htons(len); | |
1825 | spp = &pp->spp; | |
1826 | spp->spp_type = rspp->spp_type; | |
1827 | spp->spp_type_ext = rspp->spp_type_ext; | |
1828 | spp->spp_flags = FC_SPP_RESP_ACK; | |
1829 | ||
1830 | fc_rport_enter_delete(rdata, RPORT_EV_LOGO); | |
1831 | ||
f8fc6c2c BPG |
1832 | ep = fc_seq_exch(sp); |
1833 | fc_fill_fc_hdr(fp, FC_RCTL_ELS_REP, ep->did, ep->sid, | |
24f089e2 | 1834 | FC_TYPE_ELS, FC_FCTL_RESP, 0); |
f8fc6c2c BPG |
1835 | lport->tt.seq_send(lport, sp, fp); |
1836 | goto drop; | |
1837 | ||
1838 | reject_len: | |
1839 | rjt_data.reason = ELS_RJT_PROT; | |
1840 | rjt_data.explan = ELS_EXPL_INV_LEN; | |
1841 | reject: | |
42e9a92f | 1842 | lport->tt.seq_els_rsp_send(sp, ELS_LS_RJT, &rjt_data); |
f8fc6c2c BPG |
1843 | drop: |
1844 | fc_frame_free(rx_fp); | |
42e9a92f RL |
1845 | } |
1846 | ||
1847 | /** | |
3a3b42bf RL |
1848 | * fc_rport_recv_logo_req() - Handler for logout (LOGO) requests |
1849 | * @lport: The local port that received the LOGO request | |
1850 | * @sp: The sequence that the LOGO request was on | |
1851 | * @fp: The LOGO request frame | |
42e9a92f RL |
1852 | * |
1853 | * Locking Note: The rport lock is exected to be held before calling | |
1854 | * this function. | |
1855 | */ | |
83fe6a93 | 1856 | static void fc_rport_recv_logo_req(struct fc_lport *lport, |
9fb9d328 | 1857 | struct fc_seq *sp, |
42e9a92f RL |
1858 | struct fc_frame *fp) |
1859 | { | |
83fe6a93 JE |
1860 | struct fc_rport_priv *rdata; |
1861 | u32 sid; | |
42e9a92f | 1862 | |
feab4ae7 JE |
1863 | lport->tt.seq_els_rsp_send(sp, ELS_LS_ACC, NULL); |
1864 | ||
251748a9 | 1865 | sid = fc_frame_sid(fp); |
42e9a92f | 1866 | |
83fe6a93 JE |
1867 | mutex_lock(&lport->disc.disc_mutex); |
1868 | rdata = lport->tt.rport_lookup(lport, sid); | |
1869 | if (rdata) { | |
1870 | mutex_lock(&rdata->rp_mutex); | |
1871 | FC_RPORT_DBG(rdata, "Received LOGO request while in state %s\n", | |
1872 | fc_rport_state(rdata)); | |
feab4ae7 | 1873 | |
b4a9c7ed | 1874 | fc_rport_enter_delete(rdata, RPORT_EV_LOGO); |
83fe6a93 JE |
1875 | mutex_unlock(&rdata->rp_mutex); |
1876 | } else | |
1877 | FC_RPORT_ID_DBG(lport, sid, | |
1878 | "Received LOGO from non-logged-in port\n"); | |
1879 | mutex_unlock(&lport->disc.disc_mutex); | |
42e9a92f RL |
1880 | fc_frame_free(fp); |
1881 | } | |
1882 | ||
3a3b42bf RL |
1883 | /** |
1884 | * fc_rport_flush_queue() - Flush the rport_event_queue | |
1885 | */ | |
42e9a92f RL |
1886 | static void fc_rport_flush_queue(void) |
1887 | { | |
1888 | flush_workqueue(rport_event_queue); | |
1889 | } | |
1890 | ||
3a3b42bf RL |
1891 | /** |
1892 | * fc_rport_init() - Initialize the remote port layer for a local port | |
1893 | * @lport: The local port to initialize the remote port layer for | |
1894 | */ | |
42e9a92f RL |
1895 | int fc_rport_init(struct fc_lport *lport) |
1896 | { | |
8025b5db JE |
1897 | if (!lport->tt.rport_lookup) |
1898 | lport->tt.rport_lookup = fc_rport_lookup; | |
1899 | ||
5101ff99 | 1900 | if (!lport->tt.rport_create) |
9e9d0452 | 1901 | lport->tt.rport_create = fc_rport_create; |
5101ff99 | 1902 | |
42e9a92f RL |
1903 | if (!lport->tt.rport_login) |
1904 | lport->tt.rport_login = fc_rport_login; | |
1905 | ||
1906 | if (!lport->tt.rport_logoff) | |
1907 | lport->tt.rport_logoff = fc_rport_logoff; | |
1908 | ||
1909 | if (!lport->tt.rport_recv_req) | |
1910 | lport->tt.rport_recv_req = fc_rport_recv_req; | |
1911 | ||
1912 | if (!lport->tt.rport_flush_queue) | |
1913 | lport->tt.rport_flush_queue = fc_rport_flush_queue; | |
1914 | ||
f211fa51 JE |
1915 | if (!lport->tt.rport_destroy) |
1916 | lport->tt.rport_destroy = fc_rport_destroy; | |
1917 | ||
42e9a92f RL |
1918 | return 0; |
1919 | } | |
1920 | EXPORT_SYMBOL(fc_rport_init); | |
1921 | ||
3a3b42bf RL |
1922 | /** |
1923 | * fc_setup_rport() - Initialize the rport_event_queue | |
1924 | */ | |
1925 | int fc_setup_rport() | |
42e9a92f RL |
1926 | { |
1927 | rport_event_queue = create_singlethread_workqueue("fc_rport_eq"); | |
1928 | if (!rport_event_queue) | |
1929 | return -ENOMEM; | |
1930 | return 0; | |
1931 | } | |
42e9a92f | 1932 | |
3a3b42bf RL |
1933 | /** |
1934 | * fc_destroy_rport() - Destroy the rport_event_queue | |
1935 | */ | |
1936 | void fc_destroy_rport() | |
42e9a92f RL |
1937 | { |
1938 | destroy_workqueue(rport_event_queue); | |
1939 | } | |
42e9a92f | 1940 | |
3a3b42bf RL |
1941 | /** |
1942 | * fc_rport_terminate_io() - Stop all outstanding I/O on a remote port | |
1943 | * @rport: The remote port whose I/O should be terminated | |
1944 | */ | |
42e9a92f RL |
1945 | void fc_rport_terminate_io(struct fc_rport *rport) |
1946 | { | |
3a3b42bf RL |
1947 | struct fc_rport_libfc_priv *rpriv = rport->dd_data; |
1948 | struct fc_lport *lport = rpriv->local_port; | |
42e9a92f | 1949 | |
1f6ff364 AJ |
1950 | lport->tt.exch_mgr_reset(lport, 0, rport->port_id); |
1951 | lport->tt.exch_mgr_reset(lport, rport->port_id, 0); | |
42e9a92f RL |
1952 | } |
1953 | EXPORT_SYMBOL(fc_rport_terminate_io); |