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