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