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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 | ||
4d2095cc HR |
47 | /* |
48 | * RPORT REFERENCE COUNTING | |
49 | * | |
50 | * A rport reference should be taken when: | |
51 | * - an rport is allocated | |
52 | * - a workqueue item is scheduled | |
53 | * - an ELS request is send | |
54 | * The reference should be dropped when: | |
55 | * - the workqueue function has finished | |
56 | * - the ELS response is handled | |
57 | * - an rport is removed | |
58 | */ | |
59 | ||
42e9a92f RL |
60 | #include <linux/kernel.h> |
61 | #include <linux/spinlock.h> | |
62 | #include <linux/interrupt.h> | |
5a0e3ad6 | 63 | #include <linux/slab.h> |
42e9a92f RL |
64 | #include <linux/rcupdate.h> |
65 | #include <linux/timer.h> | |
66 | #include <linux/workqueue.h> | |
09703660 | 67 | #include <linux/export.h> |
b2d09103 IM |
68 | #include <linux/rculist.h> |
69 | ||
42e9a92f RL |
70 | #include <asm/unaligned.h> |
71 | ||
72 | #include <scsi/libfc.h> | |
73 | #include <scsi/fc_encode.h> | |
74 | ||
8866a5d9 RL |
75 | #include "fc_libfc.h" |
76 | ||
55204909 | 77 | static struct workqueue_struct *rport_event_queue; |
42e9a92f | 78 | |
a7b12a27 | 79 | static void fc_rport_enter_flogi(struct fc_rport_priv *); |
9fb9d328 JE |
80 | static void fc_rport_enter_plogi(struct fc_rport_priv *); |
81 | static void fc_rport_enter_prli(struct fc_rport_priv *); | |
82 | static void fc_rport_enter_rtv(struct fc_rport_priv *); | |
83 | static void fc_rport_enter_ready(struct fc_rport_priv *); | |
84 | static void fc_rport_enter_logo(struct fc_rport_priv *); | |
370c3bd0 | 85 | static void fc_rport_enter_adisc(struct fc_rport_priv *); |
42e9a92f | 86 | |
92261156 JE |
87 | static void fc_rport_recv_plogi_req(struct fc_lport *, struct fc_frame *); |
88 | static void fc_rport_recv_prli_req(struct fc_rport_priv *, struct fc_frame *); | |
89 | static void fc_rport_recv_prlo_req(struct fc_rport_priv *, struct fc_frame *); | |
90 | static void fc_rport_recv_logo_req(struct fc_lport *, struct fc_frame *); | |
42e9a92f | 91 | static void fc_rport_timeout(struct work_struct *); |
9f9504a7 HR |
92 | static void fc_rport_error(struct fc_rport_priv *, int); |
93 | static void fc_rport_error_retry(struct fc_rport_priv *, int); | |
42e9a92f RL |
94 | static void fc_rport_work(struct work_struct *); |
95 | ||
96 | static const char *fc_rport_state_names[] = { | |
42e9a92f | 97 | [RPORT_ST_INIT] = "Init", |
a7b12a27 JE |
98 | [RPORT_ST_FLOGI] = "FLOGI", |
99 | [RPORT_ST_PLOGI_WAIT] = "PLOGI_WAIT", | |
42e9a92f RL |
100 | [RPORT_ST_PLOGI] = "PLOGI", |
101 | [RPORT_ST_PRLI] = "PRLI", | |
102 | [RPORT_ST_RTV] = "RTV", | |
103 | [RPORT_ST_READY] = "Ready", | |
370c3bd0 | 104 | [RPORT_ST_ADISC] = "ADISC", |
14194054 | 105 | [RPORT_ST_DELETE] = "Delete", |
42e9a92f RL |
106 | }; |
107 | ||
8025b5db | 108 | /** |
3a3b42bf RL |
109 | * fc_rport_lookup() - Lookup a remote port by port_id |
110 | * @lport: The local port to lookup the remote port on | |
111 | * @port_id: The remote port ID to look up | |
42e90414 | 112 | * |
baa6719f HR |
113 | * The reference count of the fc_rport_priv structure is |
114 | * increased by one. | |
8025b5db | 115 | */ |
e87b7777 HR |
116 | struct fc_rport_priv *fc_rport_lookup(const struct fc_lport *lport, |
117 | u32 port_id) | |
8025b5db | 118 | { |
baa6719f | 119 | struct fc_rport_priv *rdata = NULL, *tmp_rdata; |
8025b5db | 120 | |
baa6719f HR |
121 | rcu_read_lock(); |
122 | list_for_each_entry_rcu(tmp_rdata, &lport->disc.rports, peers) | |
123 | if (tmp_rdata->ids.port_id == port_id && | |
124 | kref_get_unless_zero(&tmp_rdata->kref)) { | |
125 | rdata = tmp_rdata; | |
126 | break; | |
127 | } | |
128 | rcu_read_unlock(); | |
129 | return rdata; | |
8025b5db | 130 | } |
e87b7777 | 131 | EXPORT_SYMBOL(fc_rport_lookup); |
8025b5db | 132 | |
9e9d0452 | 133 | /** |
9737e6a7 | 134 | * fc_rport_create() - Create a new remote port |
3a3b42bf RL |
135 | * @lport: The local port this remote port will be associated with |
136 | * @ids: The identifiers for the new remote port | |
137 | * | |
138 | * The remote port will start in the INIT state. | |
9e9d0452 | 139 | * |
48f00902 | 140 | * Locking note: must be called with the disc_mutex held. |
9e9d0452 | 141 | */ |
2580064b | 142 | struct fc_rport_priv *fc_rport_create(struct fc_lport *lport, u32 port_id) |
42e9a92f | 143 | { |
ab28f1fd | 144 | struct fc_rport_priv *rdata; |
42e9a92f | 145 | |
e87b7777 | 146 | rdata = fc_rport_lookup(lport, port_id); |
19f97e3c JE |
147 | if (rdata) |
148 | return rdata; | |
149 | ||
f90377ab | 150 | rdata = kzalloc(sizeof(*rdata) + lport->rport_priv_size, GFP_KERNEL); |
9e9d0452 | 151 | if (!rdata) |
42e9a92f RL |
152 | return NULL; |
153 | ||
9737e6a7 RL |
154 | rdata->ids.node_name = -1; |
155 | rdata->ids.port_name = -1; | |
156 | rdata->ids.port_id = port_id; | |
157 | rdata->ids.roles = FC_RPORT_ROLE_UNKNOWN; | |
158 | ||
f211fa51 | 159 | kref_init(&rdata->kref); |
42e9a92f | 160 | mutex_init(&rdata->rp_mutex); |
795d86f5 | 161 | rdata->local_port = lport; |
42e9a92f RL |
162 | rdata->rp_state = RPORT_ST_INIT; |
163 | rdata->event = RPORT_EV_NONE; | |
164 | rdata->flags = FC_RP_FLAGS_REC_SUPPORTED; | |
795d86f5 JE |
165 | rdata->e_d_tov = lport->e_d_tov; |
166 | rdata->r_a_tov = lport->r_a_tov; | |
f211fa51 | 167 | rdata->maxframe_size = FC_MIN_MAX_PAYLOAD; |
42e9a92f RL |
168 | INIT_DELAYED_WORK(&rdata->retry_work, fc_rport_timeout); |
169 | INIT_WORK(&rdata->event_work, fc_rport_work); | |
75a2792d BPG |
170 | if (port_id != FC_FID_DIR_SERV) { |
171 | rdata->lld_event_callback = lport->tt.rport_event_callback; | |
42e90414 | 172 | list_add_rcu(&rdata->peers, &lport->disc.rports); |
75a2792d | 173 | } |
9fb9d328 | 174 | return rdata; |
42e9a92f | 175 | } |
2580064b | 176 | EXPORT_SYMBOL(fc_rport_create); |
42e9a92f | 177 | |
f211fa51 | 178 | /** |
3a3b42bf RL |
179 | * fc_rport_destroy() - Free a remote port after last reference is released |
180 | * @kref: The remote port's kref | |
f211fa51 | 181 | */ |
944ef968 | 182 | void fc_rport_destroy(struct kref *kref) |
f211fa51 JE |
183 | { |
184 | struct fc_rport_priv *rdata; | |
f211fa51 JE |
185 | |
186 | rdata = container_of(kref, struct fc_rport_priv, kref); | |
8497a24a | 187 | kfree_rcu(rdata, rcu); |
f211fa51 | 188 | } |
944ef968 | 189 | EXPORT_SYMBOL(fc_rport_destroy); |
f211fa51 | 190 | |
42e9a92f | 191 | /** |
3a3b42bf RL |
192 | * fc_rport_state() - Return a string identifying the remote port's state |
193 | * @rdata: The remote port | |
42e9a92f | 194 | */ |
9fb9d328 | 195 | static const char *fc_rport_state(struct fc_rport_priv *rdata) |
42e9a92f RL |
196 | { |
197 | const char *cp; | |
42e9a92f RL |
198 | |
199 | cp = fc_rport_state_names[rdata->rp_state]; | |
200 | if (!cp) | |
201 | cp = "Unknown"; | |
202 | return cp; | |
203 | } | |
204 | ||
205 | /** | |
3a3b42bf RL |
206 | * fc_set_rport_loss_tmo() - Set the remote port loss timeout |
207 | * @rport: The remote port that gets a new timeout value | |
208 | * @timeout: The new timeout value (in seconds) | |
42e9a92f RL |
209 | */ |
210 | void fc_set_rport_loss_tmo(struct fc_rport *rport, u32 timeout) | |
211 | { | |
212 | if (timeout) | |
73b43764 | 213 | rport->dev_loss_tmo = timeout; |
42e9a92f | 214 | else |
73b43764 | 215 | rport->dev_loss_tmo = 1; |
42e9a92f RL |
216 | } |
217 | EXPORT_SYMBOL(fc_set_rport_loss_tmo); | |
218 | ||
219 | /** | |
3a3b42bf RL |
220 | * fc_plogi_get_maxframe() - Get the maximum payload from the common service |
221 | * parameters in a FLOGI frame | |
a7b12a27 | 222 | * @flp: The FLOGI or PLOGI payload |
3a3b42bf RL |
223 | * @maxval: The maximum frame size upper limit; this may be less than what |
224 | * is in the service parameters | |
42e9a92f | 225 | */ |
b2ab99c9 RL |
226 | static unsigned int fc_plogi_get_maxframe(struct fc_els_flogi *flp, |
227 | unsigned int maxval) | |
42e9a92f RL |
228 | { |
229 | unsigned int mfs; | |
230 | ||
231 | /* | |
232 | * Get max payload from the common service parameters and the | |
233 | * class 3 receive data field size. | |
234 | */ | |
235 | mfs = ntohs(flp->fl_csp.sp_bb_data) & FC_SP_BB_DATA_MASK; | |
236 | if (mfs >= FC_SP_MIN_MAX_PAYLOAD && mfs < maxval) | |
237 | maxval = mfs; | |
238 | mfs = ntohs(flp->fl_cssp[3 - 1].cp_rdfs); | |
239 | if (mfs >= FC_SP_MIN_MAX_PAYLOAD && mfs < maxval) | |
240 | maxval = mfs; | |
241 | return maxval; | |
242 | } | |
243 | ||
244 | /** | |
3a3b42bf RL |
245 | * fc_rport_state_enter() - Change the state of a remote port |
246 | * @rdata: The remote port whose state should change | |
247 | * @new: The new state | |
42e9a92f RL |
248 | * |
249 | * Locking Note: Called with the rport lock held | |
250 | */ | |
9fb9d328 | 251 | static void fc_rport_state_enter(struct fc_rport_priv *rdata, |
42e9a92f RL |
252 | enum fc_rport_state new) |
253 | { | |
42e9a92f RL |
254 | if (rdata->rp_state != new) |
255 | rdata->retries = 0; | |
256 | rdata->rp_state = new; | |
257 | } | |
258 | ||
3a3b42bf RL |
259 | /** |
260 | * fc_rport_work() - Handler for remote port events in the rport_event_queue | |
261 | * @work: Handle to the remote port being dequeued | |
4d2095cc HR |
262 | * |
263 | * Reference counting: drops kref on return | |
3a3b42bf | 264 | */ |
42e9a92f RL |
265 | static void fc_rport_work(struct work_struct *work) |
266 | { | |
571f824c | 267 | u32 port_id; |
ab28f1fd JE |
268 | struct fc_rport_priv *rdata = |
269 | container_of(work, struct fc_rport_priv, event_work); | |
3a3b42bf | 270 | struct fc_rport_libfc_priv *rpriv; |
42e9a92f | 271 | enum fc_rport_event event; |
42e9a92f RL |
272 | struct fc_lport *lport = rdata->local_port; |
273 | struct fc_rport_operations *rport_ops; | |
629f4427 | 274 | struct fc_rport_identifiers ids; |
f211fa51 | 275 | struct fc_rport *rport; |
96ad8464 JE |
276 | struct fc4_prov *prov; |
277 | u8 type; | |
42e9a92f RL |
278 | |
279 | mutex_lock(&rdata->rp_mutex); | |
280 | event = rdata->event; | |
281 | rport_ops = rdata->ops; | |
f211fa51 | 282 | rport = rdata->rport; |
42e9a92f | 283 | |
9e9d0452 JE |
284 | FC_RPORT_DBG(rdata, "work event %u\n", event); |
285 | ||
629f4427 | 286 | switch (event) { |
4c0f62b5 | 287 | case RPORT_EV_READY: |
f211fa51 | 288 | ids = rdata->ids; |
5f7ea3b7 | 289 | rdata->event = RPORT_EV_NONE; |
f034260d | 290 | rdata->major_retries = 0; |
9e9d0452 | 291 | kref_get(&rdata->kref); |
42e9a92f RL |
292 | mutex_unlock(&rdata->rp_mutex); |
293 | ||
57d3ec7e HR |
294 | if (!rport) { |
295 | FC_RPORT_DBG(rdata, "No rport!\n"); | |
9e9d0452 | 296 | rport = fc_remote_port_add(lport->host, 0, &ids); |
57d3ec7e | 297 | } |
9e9d0452 JE |
298 | if (!rport) { |
299 | FC_RPORT_DBG(rdata, "Failed to add the rport\n"); | |
c96c792a | 300 | fc_rport_logoff(rdata); |
944ef968 | 301 | kref_put(&rdata->kref, fc_rport_destroy); |
9e9d0452 | 302 | return; |
42e9a92f | 303 | } |
9e9d0452 JE |
304 | mutex_lock(&rdata->rp_mutex); |
305 | if (rdata->rport) | |
306 | FC_RPORT_DBG(rdata, "rport already allocated\n"); | |
307 | rdata->rport = rport; | |
308 | rport->maxframe_size = rdata->maxframe_size; | |
309 | rport->supported_classes = rdata->supported_classes; | |
310 | ||
3a3b42bf RL |
311 | rpriv = rport->dd_data; |
312 | rpriv->local_port = lport; | |
313 | rpriv->rp_state = rdata->rp_state; | |
314 | rpriv->flags = rdata->flags; | |
315 | rpriv->e_d_tov = rdata->e_d_tov; | |
316 | rpriv->r_a_tov = rdata->r_a_tov; | |
9e9d0452 JE |
317 | mutex_unlock(&rdata->rp_mutex); |
318 | ||
8345592b | 319 | if (rport_ops && rport_ops->event_callback) { |
9e9d0452 | 320 | FC_RPORT_DBG(rdata, "callback ev %d\n", event); |
9fb9d328 | 321 | rport_ops->event_callback(lport, rdata, event); |
9e9d0452 | 322 | } |
75a2792d BPG |
323 | if (rdata->lld_event_callback) { |
324 | FC_RPORT_DBG(rdata, "lld callback ev %d\n", event); | |
325 | rdata->lld_event_callback(lport, rdata, event); | |
326 | } | |
944ef968 | 327 | kref_put(&rdata->kref, fc_rport_destroy); |
629f4427 JE |
328 | break; |
329 | ||
330 | case RPORT_EV_FAILED: | |
331 | case RPORT_EV_LOGO: | |
332 | case RPORT_EV_STOP: | |
96ad8464 JE |
333 | if (rdata->prli_count) { |
334 | mutex_lock(&fc_prov_mutex); | |
335 | for (type = 1; type < FC_FC4_PROV_SIZE; type++) { | |
336 | prov = fc_passive_prov[type]; | |
337 | if (prov && prov->prlo) | |
338 | prov->prlo(rdata); | |
339 | } | |
340 | mutex_unlock(&fc_prov_mutex); | |
341 | } | |
9e9d0452 | 342 | port_id = rdata->ids.port_id; |
42e9a92f | 343 | mutex_unlock(&rdata->rp_mutex); |
9e9d0452 | 344 | |
8345592b | 345 | if (rport_ops && rport_ops->event_callback) { |
9e9d0452 | 346 | FC_RPORT_DBG(rdata, "callback ev %d\n", event); |
9fb9d328 | 347 | rport_ops->event_callback(lport, rdata, event); |
9e9d0452 | 348 | } |
75a2792d BPG |
349 | if (rdata->lld_event_callback) { |
350 | FC_RPORT_DBG(rdata, "lld callback ev %d\n", event); | |
351 | rdata->lld_event_callback(lport, rdata, event); | |
352 | } | |
4d2095cc | 353 | if (cancel_delayed_work_sync(&rdata->retry_work)) |
944ef968 | 354 | kref_put(&rdata->kref, fc_rport_destroy); |
9e9d0452 JE |
355 | |
356 | /* | |
357 | * Reset any outstanding exchanges before freeing rport. | |
358 | */ | |
359 | lport->tt.exch_mgr_reset(lport, 0, port_id); | |
360 | lport->tt.exch_mgr_reset(lport, port_id, 0); | |
361 | ||
362 | if (rport) { | |
3a3b42bf RL |
363 | rpriv = rport->dd_data; |
364 | rpriv->rp_state = RPORT_ST_DELETE; | |
9e9d0452 JE |
365 | mutex_lock(&rdata->rp_mutex); |
366 | rdata->rport = NULL; | |
367 | mutex_unlock(&rdata->rp_mutex); | |
42e9a92f | 368 | fc_remote_port_delete(rport); |
571f824c | 369 | } |
4b2164d4 | 370 | |
4b2164d4 JE |
371 | mutex_lock(&rdata->rp_mutex); |
372 | if (rdata->rp_state == RPORT_ST_DELETE) { | |
373 | if (port_id == FC_FID_DIR_SERV) { | |
374 | rdata->event = RPORT_EV_NONE; | |
375 | mutex_unlock(&rdata->rp_mutex); | |
944ef968 | 376 | kref_put(&rdata->kref, fc_rport_destroy); |
f034260d JE |
377 | } else if ((rdata->flags & FC_RP_STARTED) && |
378 | rdata->major_retries < | |
379 | lport->max_rport_retry_count) { | |
380 | rdata->major_retries++; | |
4b2164d4 JE |
381 | rdata->event = RPORT_EV_NONE; |
382 | FC_RPORT_DBG(rdata, "work restart\n"); | |
a7b12a27 | 383 | fc_rport_enter_flogi(rdata); |
4b2164d4 JE |
384 | mutex_unlock(&rdata->rp_mutex); |
385 | } else { | |
386 | FC_RPORT_DBG(rdata, "work delete\n"); | |
a407c593 | 387 | mutex_lock(&lport->disc.disc_mutex); |
42e90414 | 388 | list_del_rcu(&rdata->peers); |
a407c593 | 389 | mutex_unlock(&lport->disc.disc_mutex); |
4b2164d4 | 390 | mutex_unlock(&rdata->rp_mutex); |
944ef968 | 391 | kref_put(&rdata->kref, fc_rport_destroy); |
4b2164d4 JE |
392 | } |
393 | } else { | |
394 | /* | |
395 | * Re-open for events. Reissue READY event if ready. | |
396 | */ | |
397 | rdata->event = RPORT_EV_NONE; | |
57d3ec7e HR |
398 | if (rdata->rp_state == RPORT_ST_READY) { |
399 | FC_RPORT_DBG(rdata, "work reopen\n"); | |
4b2164d4 | 400 | fc_rport_enter_ready(rdata); |
57d3ec7e | 401 | } |
b4a9c7ed | 402 | mutex_unlock(&rdata->rp_mutex); |
4b2164d4 | 403 | } |
629f4427 JE |
404 | break; |
405 | ||
406 | default: | |
42e9a92f | 407 | mutex_unlock(&rdata->rp_mutex); |
629f4427 JE |
408 | break; |
409 | } | |
944ef968 | 410 | kref_put(&rdata->kref, fc_rport_destroy); |
42e9a92f RL |
411 | } |
412 | ||
413 | /** | |
34f42a07 | 414 | * fc_rport_login() - Start the remote port login state machine |
3a3b42bf | 415 | * @rdata: The remote port to be logged in to |
42e9a92f | 416 | * |
05d7d3b0 HR |
417 | * Initiates the RP state machine. It is called from the LP module. |
418 | * This function will issue the following commands to the N_Port | |
419 | * identified by the FC ID provided. | |
420 | * | |
421 | * - PLOGI | |
422 | * - PRLI | |
423 | * - RTV | |
424 | * | |
42e9a92f RL |
425 | * Locking Note: Called without the rport lock held. This |
426 | * function will hold the rport lock, call an _enter_* | |
427 | * function and then unlock the rport. | |
370c3bd0 JE |
428 | * |
429 | * This indicates the intent to be logged into the remote port. | |
430 | * If it appears we are already logged in, ADISC is used to verify | |
431 | * the setup. | |
42e9a92f | 432 | */ |
05d7d3b0 | 433 | int fc_rport_login(struct fc_rport_priv *rdata) |
42e9a92f | 434 | { |
42e9a92f RL |
435 | mutex_lock(&rdata->rp_mutex); |
436 | ||
06ee2571 HR |
437 | if (rdata->flags & FC_RP_STARTED) { |
438 | FC_RPORT_DBG(rdata, "port already started\n"); | |
439 | mutex_unlock(&rdata->rp_mutex); | |
440 | return 0; | |
441 | } | |
442 | ||
4b2164d4 | 443 | rdata->flags |= FC_RP_STARTED; |
370c3bd0 JE |
444 | switch (rdata->rp_state) { |
445 | case RPORT_ST_READY: | |
446 | FC_RPORT_DBG(rdata, "ADISC port\n"); | |
447 | fc_rport_enter_adisc(rdata); | |
448 | break; | |
b4a9c7ed JE |
449 | case RPORT_ST_DELETE: |
450 | FC_RPORT_DBG(rdata, "Restart deleted port\n"); | |
b4a9c7ed | 451 | break; |
e5a20009 | 452 | case RPORT_ST_INIT: |
370c3bd0 | 453 | FC_RPORT_DBG(rdata, "Login to port\n"); |
a7b12a27 | 454 | fc_rport_enter_flogi(rdata); |
370c3bd0 | 455 | break; |
e5a20009 HR |
456 | default: |
457 | FC_RPORT_DBG(rdata, "Login in progress, state %s\n", | |
458 | fc_rport_state(rdata)); | |
459 | break; | |
370c3bd0 | 460 | } |
42e9a92f RL |
461 | mutex_unlock(&rdata->rp_mutex); |
462 | ||
463 | return 0; | |
464 | } | |
05d7d3b0 | 465 | EXPORT_SYMBOL(fc_rport_login); |
42e9a92f | 466 | |
5f7ea3b7 | 467 | /** |
3a3b42bf RL |
468 | * fc_rport_enter_delete() - Schedule a remote port to be deleted |
469 | * @rdata: The remote port to be deleted | |
470 | * @event: The event to report as the reason for deletion | |
5f7ea3b7 JE |
471 | * |
472 | * Locking Note: Called with the rport lock held. | |
473 | * | |
474 | * Allow state change into DELETE only once. | |
475 | * | |
476 | * Call queue_work only if there's no event already pending. | |
477 | * Set the new event so that the old pending event will not occur. | |
478 | * Since we have the mutex, even if fc_rport_work() is already started, | |
479 | * it'll see the new event. | |
4d2095cc HR |
480 | * |
481 | * Reference counting: does not modify kref | |
5f7ea3b7 | 482 | */ |
9fb9d328 | 483 | static void fc_rport_enter_delete(struct fc_rport_priv *rdata, |
5f7ea3b7 JE |
484 | enum fc_rport_event event) |
485 | { | |
5f7ea3b7 JE |
486 | if (rdata->rp_state == RPORT_ST_DELETE) |
487 | return; | |
488 | ||
9fb9d328 | 489 | FC_RPORT_DBG(rdata, "Delete port\n"); |
5f7ea3b7 | 490 | |
9fb9d328 | 491 | fc_rport_state_enter(rdata, RPORT_ST_DELETE); |
5f7ea3b7 | 492 | |
4d2095cc HR |
493 | kref_get(&rdata->kref); |
494 | if (rdata->event == RPORT_EV_NONE && | |
495 | !queue_work(rport_event_queue, &rdata->event_work)) | |
944ef968 | 496 | kref_put(&rdata->kref, fc_rport_destroy); |
4d2095cc | 497 | |
5f7ea3b7 JE |
498 | rdata->event = event; |
499 | } | |
500 | ||
42e9a92f | 501 | /** |
3a3b42bf RL |
502 | * fc_rport_logoff() - Logoff and remove a remote port |
503 | * @rdata: The remote port to be logged off of | |
42e9a92f RL |
504 | * |
505 | * Locking Note: Called without the rport lock held. This | |
506 | * function will hold the rport lock, call an _enter_* | |
507 | * function and then unlock the rport. | |
508 | */ | |
c96c792a | 509 | int fc_rport_logoff(struct fc_rport_priv *rdata) |
42e9a92f | 510 | { |
649eb869 HR |
511 | struct fc_lport *lport = rdata->local_port; |
512 | u32 port_id = rdata->ids.port_id; | |
513 | ||
42e9a92f RL |
514 | mutex_lock(&rdata->rp_mutex); |
515 | ||
9fb9d328 | 516 | FC_RPORT_DBG(rdata, "Remove port\n"); |
42e9a92f | 517 | |
4b2164d4 | 518 | rdata->flags &= ~FC_RP_STARTED; |
14194054 | 519 | if (rdata->rp_state == RPORT_ST_DELETE) { |
9fb9d328 | 520 | FC_RPORT_DBG(rdata, "Port in Delete state, not removing\n"); |
b4c6f546 AJ |
521 | goto out; |
522 | } | |
649eb869 HR |
523 | /* |
524 | * FC-LS states: | |
525 | * To explicitly Logout, the initiating Nx_Port shall terminate | |
526 | * other open Sequences that it initiated with the destination | |
527 | * Nx_Port prior to performing Logout. | |
528 | */ | |
529 | lport->tt.exch_mgr_reset(lport, 0, port_id); | |
530 | lport->tt.exch_mgr_reset(lport, port_id, 0); | |
531 | ||
4b2164d4 | 532 | fc_rport_enter_logo(rdata); |
42e9a92f RL |
533 | |
534 | /* | |
14194054 | 535 | * Change the state to Delete so that we discard |
42e9a92f RL |
536 | * the response. |
537 | */ | |
9fb9d328 | 538 | fc_rport_enter_delete(rdata, RPORT_EV_STOP); |
b4c6f546 | 539 | out: |
b4a9c7ed | 540 | mutex_unlock(&rdata->rp_mutex); |
42e9a92f RL |
541 | return 0; |
542 | } | |
c96c792a | 543 | EXPORT_SYMBOL(fc_rport_logoff); |
42e9a92f RL |
544 | |
545 | /** | |
3a3b42bf RL |
546 | * fc_rport_enter_ready() - Transition to the RPORT_ST_READY state |
547 | * @rdata: The remote port that is ready | |
42e9a92f RL |
548 | * |
549 | * Locking Note: The rport lock is expected to be held before calling | |
550 | * this routine. | |
4d2095cc HR |
551 | * |
552 | * Reference counting: schedules workqueue, does not modify kref | |
42e9a92f | 553 | */ |
9fb9d328 | 554 | static void fc_rport_enter_ready(struct fc_rport_priv *rdata) |
42e9a92f | 555 | { |
9fb9d328 | 556 | fc_rport_state_enter(rdata, RPORT_ST_READY); |
42e9a92f | 557 | |
9fb9d328 | 558 | FC_RPORT_DBG(rdata, "Port is Ready\n"); |
42e9a92f | 559 | |
4d2095cc HR |
560 | kref_get(&rdata->kref); |
561 | if (rdata->event == RPORT_EV_NONE && | |
562 | !queue_work(rport_event_queue, &rdata->event_work)) | |
944ef968 | 563 | kref_put(&rdata->kref, fc_rport_destroy); |
4d2095cc | 564 | |
4c0f62b5 | 565 | rdata->event = RPORT_EV_READY; |
42e9a92f RL |
566 | } |
567 | ||
568 | /** | |
3a3b42bf RL |
569 | * fc_rport_timeout() - Handler for the retry_work timer |
570 | * @work: Handle to the remote port that has timed out | |
42e9a92f RL |
571 | * |
572 | * Locking Note: Called without the rport lock held. This | |
573 | * function will hold the rport lock, call an _enter_* | |
574 | * function and then unlock the rport. | |
4d2095cc HR |
575 | * |
576 | * Reference counting: Drops kref on return. | |
42e9a92f RL |
577 | */ |
578 | static void fc_rport_timeout(struct work_struct *work) | |
579 | { | |
ab28f1fd JE |
580 | struct fc_rport_priv *rdata = |
581 | container_of(work, struct fc_rport_priv, retry_work.work); | |
42e9a92f RL |
582 | |
583 | mutex_lock(&rdata->rp_mutex); | |
57d3ec7e | 584 | FC_RPORT_DBG(rdata, "Port timeout, state %s\n", fc_rport_state(rdata)); |
42e9a92f RL |
585 | |
586 | switch (rdata->rp_state) { | |
a7b12a27 JE |
587 | case RPORT_ST_FLOGI: |
588 | fc_rport_enter_flogi(rdata); | |
589 | break; | |
42e9a92f | 590 | case RPORT_ST_PLOGI: |
9fb9d328 | 591 | fc_rport_enter_plogi(rdata); |
42e9a92f RL |
592 | break; |
593 | case RPORT_ST_PRLI: | |
9fb9d328 | 594 | fc_rport_enter_prli(rdata); |
42e9a92f RL |
595 | break; |
596 | case RPORT_ST_RTV: | |
9fb9d328 | 597 | fc_rport_enter_rtv(rdata); |
42e9a92f | 598 | break; |
370c3bd0 JE |
599 | case RPORT_ST_ADISC: |
600 | fc_rport_enter_adisc(rdata); | |
601 | break; | |
a7b12a27 | 602 | case RPORT_ST_PLOGI_WAIT: |
42e9a92f RL |
603 | case RPORT_ST_READY: |
604 | case RPORT_ST_INIT: | |
14194054 | 605 | case RPORT_ST_DELETE: |
42e9a92f RL |
606 | break; |
607 | } | |
608 | ||
609 | mutex_unlock(&rdata->rp_mutex); | |
944ef968 | 610 | kref_put(&rdata->kref, fc_rport_destroy); |
42e9a92f RL |
611 | } |
612 | ||
613 | /** | |
34f42a07 | 614 | * fc_rport_error() - Error handler, called once retries have been exhausted |
3a3b42bf | 615 | * @rdata: The remote port the error is happened on |
9f9504a7 | 616 | * @err: The error code |
42e9a92f | 617 | * |
42e9a92f RL |
618 | * Locking Note: The rport lock is expected to be held before |
619 | * calling this routine | |
4d2095cc HR |
620 | * |
621 | * Reference counting: does not modify kref | |
42e9a92f | 622 | */ |
9f9504a7 | 623 | static void fc_rport_error(struct fc_rport_priv *rdata, int err) |
42e9a92f | 624 | { |
d391966a HR |
625 | struct fc_lport *lport = rdata->local_port; |
626 | ||
9f9504a7 HR |
627 | FC_RPORT_DBG(rdata, "Error %d in state %s, retries %d\n", |
628 | -err, fc_rport_state(rdata), rdata->retries); | |
42e9a92f | 629 | |
6755db1c | 630 | switch (rdata->rp_state) { |
a7b12a27 | 631 | case RPORT_ST_FLOGI: |
4b2164d4 | 632 | rdata->flags &= ~FC_RP_STARTED; |
9fb9d328 | 633 | fc_rport_enter_delete(rdata, RPORT_EV_FAILED); |
6755db1c | 634 | break; |
d391966a HR |
635 | case RPORT_ST_PLOGI: |
636 | if (lport->point_to_multipoint) { | |
637 | rdata->flags &= ~FC_RP_STARTED; | |
638 | fc_rport_enter_delete(rdata, RPORT_EV_FAILED); | |
639 | } else | |
640 | fc_rport_enter_logo(rdata); | |
641 | break; | |
6755db1c | 642 | case RPORT_ST_RTV: |
9fb9d328 | 643 | fc_rport_enter_ready(rdata); |
6755db1c | 644 | break; |
370c3bd0 JE |
645 | case RPORT_ST_PRLI: |
646 | case RPORT_ST_ADISC: | |
647 | fc_rport_enter_logo(rdata); | |
648 | break; | |
a7b12a27 | 649 | case RPORT_ST_PLOGI_WAIT: |
14194054 | 650 | case RPORT_ST_DELETE: |
6755db1c CL |
651 | case RPORT_ST_READY: |
652 | case RPORT_ST_INIT: | |
653 | break; | |
42e9a92f RL |
654 | } |
655 | } | |
656 | ||
6755db1c | 657 | /** |
3a3b42bf RL |
658 | * fc_rport_error_retry() - Handler for remote port state retries |
659 | * @rdata: The remote port whose state is to be retried | |
9f9504a7 | 660 | * @err: The error code |
6755db1c CL |
661 | * |
662 | * If the error was an exchange timeout retry immediately, | |
663 | * otherwise wait for E_D_TOV. | |
664 | * | |
665 | * Locking Note: The rport lock is expected to be held before | |
666 | * calling this routine | |
4d2095cc HR |
667 | * |
668 | * Reference counting: increments kref when scheduling retry_work | |
6755db1c | 669 | */ |
9f9504a7 | 670 | static void fc_rport_error_retry(struct fc_rport_priv *rdata, int err) |
6755db1c | 671 | { |
a50cc9ec | 672 | unsigned long delay = msecs_to_jiffies(rdata->e_d_tov); |
6755db1c CL |
673 | |
674 | /* make sure this isn't an FC_EX_CLOSED error, never retry those */ | |
9f9504a7 | 675 | if (err == -FC_EX_CLOSED) |
28a4af1e | 676 | goto out; |
6755db1c | 677 | |
a3666955 | 678 | if (rdata->retries < rdata->local_port->max_rport_retry_count) { |
9f9504a7 HR |
679 | FC_RPORT_DBG(rdata, "Error %d in state %s, retrying\n", |
680 | err, fc_rport_state(rdata)); | |
6755db1c CL |
681 | rdata->retries++; |
682 | /* no additional delay on exchange timeouts */ | |
9f9504a7 | 683 | if (err == -FC_EX_TIMEOUT) |
6755db1c | 684 | delay = 0; |
4d2095cc HR |
685 | kref_get(&rdata->kref); |
686 | if (!schedule_delayed_work(&rdata->retry_work, delay)) | |
944ef968 | 687 | kref_put(&rdata->kref, fc_rport_destroy); |
6755db1c CL |
688 | return; |
689 | } | |
690 | ||
28a4af1e | 691 | out: |
9f9504a7 | 692 | fc_rport_error(rdata, err); |
6755db1c CL |
693 | } |
694 | ||
42e9a92f | 695 | /** |
a7b12a27 JE |
696 | * fc_rport_login_complete() - Handle parameters and completion of p-mp login. |
697 | * @rdata: The remote port which we logged into or which logged into us. | |
698 | * @fp: The FLOGI or PLOGI request or response frame | |
699 | * | |
700 | * Returns non-zero error if a problem is detected with the frame. | |
701 | * Does not free the frame. | |
702 | * | |
703 | * This is only used in point-to-multipoint mode for FIP currently. | |
704 | */ | |
705 | static int fc_rport_login_complete(struct fc_rport_priv *rdata, | |
706 | struct fc_frame *fp) | |
707 | { | |
708 | struct fc_lport *lport = rdata->local_port; | |
709 | struct fc_els_flogi *flogi; | |
710 | unsigned int e_d_tov; | |
711 | u16 csp_flags; | |
712 | ||
713 | flogi = fc_frame_payload_get(fp, sizeof(*flogi)); | |
714 | if (!flogi) | |
715 | return -EINVAL; | |
716 | ||
717 | csp_flags = ntohs(flogi->fl_csp.sp_features); | |
718 | ||
719 | if (fc_frame_payload_op(fp) == ELS_FLOGI) { | |
720 | if (csp_flags & FC_SP_FT_FPORT) { | |
721 | FC_RPORT_DBG(rdata, "Fabric bit set in FLOGI\n"); | |
722 | return -EINVAL; | |
723 | } | |
724 | } else { | |
725 | ||
726 | /* | |
727 | * E_D_TOV is not valid on an incoming FLOGI request. | |
728 | */ | |
729 | e_d_tov = ntohl(flogi->fl_csp.sp_e_d_tov); | |
730 | if (csp_flags & FC_SP_FT_EDTR) | |
731 | e_d_tov /= 1000000; | |
732 | if (e_d_tov > rdata->e_d_tov) | |
733 | rdata->e_d_tov = e_d_tov; | |
734 | } | |
735 | rdata->maxframe_size = fc_plogi_get_maxframe(flogi, lport->mfs); | |
736 | return 0; | |
737 | } | |
738 | ||
739 | /** | |
740 | * fc_rport_flogi_resp() - Handle response to FLOGI request for p-mp mode | |
741 | * @sp: The sequence that the FLOGI was on | |
742 | * @fp: The FLOGI response frame | |
743 | * @rp_arg: The remote port that received the FLOGI response | |
744 | */ | |
c6b21c93 BVA |
745 | static void fc_rport_flogi_resp(struct fc_seq *sp, struct fc_frame *fp, |
746 | void *rp_arg) | |
a7b12a27 JE |
747 | { |
748 | struct fc_rport_priv *rdata = rp_arg; | |
749 | struct fc_lport *lport = rdata->local_port; | |
750 | struct fc_els_flogi *flogi; | |
751 | unsigned int r_a_tov; | |
9f9504a7 HR |
752 | u8 opcode; |
753 | int err = 0; | |
a7b12a27 | 754 | |
9f9504a7 HR |
755 | FC_RPORT_DBG(rdata, "Received a FLOGI %s\n", |
756 | IS_ERR(fp) ? "error" : fc_els_resp_type(fp)); | |
a7b12a27 JE |
757 | |
758 | if (fp == ERR_PTR(-FC_EX_CLOSED)) | |
0e9e3d3b | 759 | goto put; |
a7b12a27 JE |
760 | |
761 | mutex_lock(&rdata->rp_mutex); | |
762 | ||
763 | if (rdata->rp_state != RPORT_ST_FLOGI) { | |
764 | FC_RPORT_DBG(rdata, "Received a FLOGI response, but in state " | |
765 | "%s\n", fc_rport_state(rdata)); | |
766 | if (IS_ERR(fp)) | |
767 | goto err; | |
768 | goto out; | |
769 | } | |
770 | ||
771 | if (IS_ERR(fp)) { | |
9f9504a7 | 772 | fc_rport_error(rdata, PTR_ERR(fp)); |
a7b12a27 JE |
773 | goto err; |
774 | } | |
9f9504a7 HR |
775 | opcode = fc_frame_payload_op(fp); |
776 | if (opcode == ELS_LS_RJT) { | |
777 | struct fc_els_ls_rjt *rjt; | |
a7b12a27 | 778 | |
9f9504a7 HR |
779 | rjt = fc_frame_payload_get(fp, sizeof(*rjt)); |
780 | FC_RPORT_DBG(rdata, "FLOGI ELS rejected, reason %x expl %x\n", | |
781 | rjt->er_reason, rjt->er_explan); | |
782 | err = -FC_EX_ELS_RJT; | |
783 | goto bad; | |
784 | } else if (opcode != ELS_LS_ACC) { | |
785 | FC_RPORT_DBG(rdata, "FLOGI ELS invalid opcode %x\n", opcode); | |
786 | err = -FC_EX_ELS_RJT; | |
a7b12a27 | 787 | goto bad; |
9f9504a7 HR |
788 | } |
789 | if (fc_rport_login_complete(rdata, fp)) { | |
790 | FC_RPORT_DBG(rdata, "FLOGI failed, no login\n"); | |
791 | err = -FC_EX_INV_LOGIN; | |
a7b12a27 | 792 | goto bad; |
9f9504a7 | 793 | } |
a7b12a27 JE |
794 | |
795 | flogi = fc_frame_payload_get(fp, sizeof(*flogi)); | |
f89b8d67 | 796 | if (!flogi) { |
9f9504a7 | 797 | err = -FC_EX_ALLOC_ERR; |
a7b12a27 | 798 | goto bad; |
f89b8d67 | 799 | } |
a7b12a27 JE |
800 | r_a_tov = ntohl(flogi->fl_csp.sp_r_a_tov); |
801 | if (r_a_tov > rdata->r_a_tov) | |
802 | rdata->r_a_tov = r_a_tov; | |
803 | ||
804 | if (rdata->ids.port_name < lport->wwpn) | |
805 | fc_rport_enter_plogi(rdata); | |
806 | else | |
807 | fc_rport_state_enter(rdata, RPORT_ST_PLOGI_WAIT); | |
808 | out: | |
809 | fc_frame_free(fp); | |
810 | err: | |
811 | mutex_unlock(&rdata->rp_mutex); | |
0e9e3d3b | 812 | put: |
944ef968 | 813 | kref_put(&rdata->kref, fc_rport_destroy); |
a7b12a27 JE |
814 | return; |
815 | bad: | |
9f9504a7 HR |
816 | FC_RPORT_DBG(rdata, "Bad FLOGI response\n"); |
817 | fc_rport_error_retry(rdata, err); | |
a7b12a27 JE |
818 | goto out; |
819 | } | |
820 | ||
821 | /** | |
822 | * fc_rport_enter_flogi() - Send a FLOGI request to the remote port for p-mp | |
823 | * @rdata: The remote port to send a FLOGI to | |
824 | * | |
825 | * Locking Note: The rport lock is expected to be held before calling | |
826 | * this routine. | |
4d2095cc HR |
827 | * |
828 | * Reference counting: increments kref when sending ELS | |
a7b12a27 JE |
829 | */ |
830 | static void fc_rport_enter_flogi(struct fc_rport_priv *rdata) | |
831 | { | |
832 | struct fc_lport *lport = rdata->local_port; | |
833 | struct fc_frame *fp; | |
834 | ||
835 | if (!lport->point_to_multipoint) | |
836 | return fc_rport_enter_plogi(rdata); | |
837 | ||
838 | FC_RPORT_DBG(rdata, "Entered FLOGI state from %s state\n", | |
839 | fc_rport_state(rdata)); | |
840 | ||
841 | fc_rport_state_enter(rdata, RPORT_ST_FLOGI); | |
842 | ||
843 | fp = fc_frame_alloc(lport, sizeof(struct fc_els_flogi)); | |
844 | if (!fp) | |
9f9504a7 | 845 | return fc_rport_error_retry(rdata, -FC_EX_ALLOC_ERR); |
a7b12a27 | 846 | |
4d2095cc | 847 | kref_get(&rdata->kref); |
a7b12a27 JE |
848 | if (!lport->tt.elsct_send(lport, rdata->ids.port_id, fp, ELS_FLOGI, |
849 | fc_rport_flogi_resp, rdata, | |
4d2095cc | 850 | 2 * lport->r_a_tov)) { |
9f9504a7 | 851 | fc_rport_error_retry(rdata, -FC_EX_XMIT_ERR); |
944ef968 | 852 | kref_put(&rdata->kref, fc_rport_destroy); |
4d2095cc | 853 | } |
a7b12a27 JE |
854 | } |
855 | ||
856 | /** | |
857 | * fc_rport_recv_flogi_req() - Handle Fabric Login (FLOGI) request in p-mp mode | |
858 | * @lport: The local port that received the PLOGI request | |
a7b12a27 | 859 | * @rx_fp: The PLOGI request frame |
4d2095cc HR |
860 | * |
861 | * Reference counting: drops kref on return | |
a7b12a27 JE |
862 | */ |
863 | static void fc_rport_recv_flogi_req(struct fc_lport *lport, | |
92261156 | 864 | struct fc_frame *rx_fp) |
a7b12a27 JE |
865 | { |
866 | struct fc_disc *disc; | |
867 | struct fc_els_flogi *flp; | |
868 | struct fc_rport_priv *rdata; | |
869 | struct fc_frame *fp = rx_fp; | |
a7b12a27 | 870 | struct fc_seq_els_data rjt_data; |
24f089e2 | 871 | u32 sid; |
a7b12a27 | 872 | |
251748a9 | 873 | sid = fc_frame_sid(fp); |
a7b12a27 JE |
874 | |
875 | FC_RPORT_ID_DBG(lport, sid, "Received FLOGI request\n"); | |
876 | ||
877 | disc = &lport->disc; | |
a7b12a27 JE |
878 | if (!lport->point_to_multipoint) { |
879 | rjt_data.reason = ELS_RJT_UNSUP; | |
880 | rjt_data.explan = ELS_EXPL_NONE; | |
881 | goto reject; | |
882 | } | |
883 | ||
884 | flp = fc_frame_payload_get(fp, sizeof(*flp)); | |
885 | if (!flp) { | |
886 | rjt_data.reason = ELS_RJT_LOGIC; | |
887 | rjt_data.explan = ELS_EXPL_INV_LEN; | |
888 | goto reject; | |
889 | } | |
890 | ||
e87b7777 | 891 | rdata = fc_rport_lookup(lport, sid); |
a7b12a27 JE |
892 | if (!rdata) { |
893 | rjt_data.reason = ELS_RJT_FIP; | |
894 | rjt_data.explan = ELS_EXPL_NOT_NEIGHBOR; | |
895 | goto reject; | |
896 | } | |
897 | mutex_lock(&rdata->rp_mutex); | |
898 | ||
899 | FC_RPORT_DBG(rdata, "Received FLOGI in %s state\n", | |
900 | fc_rport_state(rdata)); | |
901 | ||
902 | switch (rdata->rp_state) { | |
903 | case RPORT_ST_INIT: | |
48058481 KP |
904 | /* |
905 | * If received the FLOGI request on RPORT which is INIT state | |
906 | * (means not transition to FLOGI either fc_rport timeout | |
907 | * function didn;t trigger or this end hasn;t received | |
908 | * beacon yet from other end. In that case only, allow RPORT | |
909 | * state machine to continue, otherwise fall through which | |
910 | * causes the code to send reject response. | |
911 | * NOTE; Not checking for FIP->state such as VNMP_UP or | |
912 | * VNMP_CLAIM because if FIP state is not one of those, | |
913 | * RPORT wouldn;t have created and 'rport_lookup' would have | |
914 | * failed anyway in that case. | |
915 | */ | |
4d2095cc | 916 | break; |
a7b12a27 JE |
917 | case RPORT_ST_DELETE: |
918 | mutex_unlock(&rdata->rp_mutex); | |
919 | rjt_data.reason = ELS_RJT_FIP; | |
920 | rjt_data.explan = ELS_EXPL_NOT_NEIGHBOR; | |
baa6719f | 921 | goto reject_put; |
a7b12a27 JE |
922 | case RPORT_ST_FLOGI: |
923 | case RPORT_ST_PLOGI_WAIT: | |
924 | case RPORT_ST_PLOGI: | |
925 | break; | |
926 | case RPORT_ST_PRLI: | |
927 | case RPORT_ST_RTV: | |
928 | case RPORT_ST_READY: | |
929 | case RPORT_ST_ADISC: | |
930 | /* | |
931 | * Set the remote port to be deleted and to then restart. | |
932 | * This queues work to be sure exchanges are reset. | |
933 | */ | |
934 | fc_rport_enter_delete(rdata, RPORT_EV_LOGO); | |
935 | mutex_unlock(&rdata->rp_mutex); | |
936 | rjt_data.reason = ELS_RJT_BUSY; | |
937 | rjt_data.explan = ELS_EXPL_NONE; | |
baa6719f | 938 | goto reject_put; |
a7b12a27 JE |
939 | } |
940 | if (fc_rport_login_complete(rdata, fp)) { | |
941 | mutex_unlock(&rdata->rp_mutex); | |
942 | rjt_data.reason = ELS_RJT_LOGIC; | |
943 | rjt_data.explan = ELS_EXPL_NONE; | |
baa6719f | 944 | goto reject_put; |
a7b12a27 | 945 | } |
a7b12a27 JE |
946 | |
947 | fp = fc_frame_alloc(lport, sizeof(*flp)); | |
948 | if (!fp) | |
949 | goto out; | |
950 | ||
a7b12a27 JE |
951 | fc_flogi_fill(lport, fp); |
952 | flp = fc_frame_payload_get(fp, sizeof(*flp)); | |
953 | flp->fl_cmd = ELS_LS_ACC; | |
954 | ||
24f089e2 JE |
955 | fc_fill_reply_hdr(fp, rx_fp, FC_RCTL_ELS_REP, 0); |
956 | lport->tt.frame_send(lport, fp); | |
a7b12a27 | 957 | |
f89b8d67 HR |
958 | /* |
959 | * Do not proceed with the state machine if our | |
960 | * FLOGI has crossed with an FLOGI from the | |
961 | * remote port; wait for the FLOGI response instead. | |
962 | */ | |
963 | if (rdata->rp_state != RPORT_ST_FLOGI) { | |
964 | if (rdata->ids.port_name < lport->wwpn) | |
965 | fc_rport_enter_plogi(rdata); | |
966 | else | |
967 | fc_rport_state_enter(rdata, RPORT_ST_PLOGI_WAIT); | |
968 | } | |
a7b12a27 JE |
969 | out: |
970 | mutex_unlock(&rdata->rp_mutex); | |
944ef968 | 971 | kref_put(&rdata->kref, fc_rport_destroy); |
24f089e2 | 972 | fc_frame_free(rx_fp); |
a7b12a27 JE |
973 | return; |
974 | ||
baa6719f | 975 | reject_put: |
944ef968 | 976 | kref_put(&rdata->kref, fc_rport_destroy); |
a7b12a27 | 977 | reject: |
7ab24dd1 | 978 | fc_seq_els_rsp_send(rx_fp, ELS_LS_RJT, &rjt_data); |
24f089e2 | 979 | fc_frame_free(rx_fp); |
a7b12a27 JE |
980 | } |
981 | ||
982 | /** | |
983 | * fc_rport_plogi_resp() - Handler for ELS PLOGI responses | |
3a3b42bf RL |
984 | * @sp: The sequence the PLOGI is on |
985 | * @fp: The PLOGI response frame | |
986 | * @rdata_arg: The remote port that sent the PLOGI response | |
42e9a92f RL |
987 | * |
988 | * Locking Note: This function will be called without the rport lock | |
989 | * held, but it will lock, call an _enter_* function or fc_rport_error | |
990 | * and then unlock the rport. | |
991 | */ | |
992 | static void fc_rport_plogi_resp(struct fc_seq *sp, struct fc_frame *fp, | |
9fb9d328 | 993 | void *rdata_arg) |
42e9a92f | 994 | { |
9fb9d328 | 995 | struct fc_rport_priv *rdata = rdata_arg; |
42e9a92f | 996 | struct fc_lport *lport = rdata->local_port; |
a29e7646 | 997 | struct fc_els_flogi *plp = NULL; |
42e9a92f RL |
998 | u16 csp_seq; |
999 | u16 cssp_seq; | |
1000 | u8 op; | |
1001 | ||
f657d299 | 1002 | FC_RPORT_DBG(rdata, "Received a PLOGI %s\n", fc_els_resp_type(fp)); |
42e9a92f | 1003 | |
785141c6 CD |
1004 | if (fp == ERR_PTR(-FC_EX_CLOSED)) |
1005 | goto put; | |
1006 | ||
1007 | mutex_lock(&rdata->rp_mutex); | |
1008 | ||
42e9a92f | 1009 | if (rdata->rp_state != RPORT_ST_PLOGI) { |
9fb9d328 JE |
1010 | FC_RPORT_DBG(rdata, "Received a PLOGI response, but in state " |
1011 | "%s\n", fc_rport_state(rdata)); | |
76f6804e AJ |
1012 | if (IS_ERR(fp)) |
1013 | goto err; | |
42e9a92f RL |
1014 | goto out; |
1015 | } | |
1016 | ||
76f6804e | 1017 | if (IS_ERR(fp)) { |
9f9504a7 | 1018 | fc_rport_error_retry(rdata, PTR_ERR(fp)); |
76f6804e AJ |
1019 | goto err; |
1020 | } | |
1021 | ||
42e9a92f RL |
1022 | op = fc_frame_payload_op(fp); |
1023 | if (op == ELS_LS_ACC && | |
1024 | (plp = fc_frame_payload_get(fp, sizeof(*plp))) != NULL) { | |
f211fa51 JE |
1025 | rdata->ids.port_name = get_unaligned_be64(&plp->fl_wwpn); |
1026 | rdata->ids.node_name = get_unaligned_be64(&plp->fl_wwnn); | |
42e9a92f | 1027 | |
75a2792d BPG |
1028 | /* save plogi response sp_features for further reference */ |
1029 | rdata->sp_features = ntohs(plp->fl_csp.sp_features); | |
1030 | ||
a7b12a27 JE |
1031 | if (lport->point_to_multipoint) |
1032 | fc_rport_login_complete(rdata, fp); | |
42e9a92f RL |
1033 | csp_seq = ntohs(plp->fl_csp.sp_tot_seq); |
1034 | cssp_seq = ntohs(plp->fl_cssp[3 - 1].cp_con_seq); | |
1035 | if (cssp_seq < csp_seq) | |
1036 | csp_seq = cssp_seq; | |
1037 | rdata->max_seq = csp_seq; | |
f211fa51 | 1038 | rdata->maxframe_size = fc_plogi_get_maxframe(plp, lport->mfs); |
3ac6f98f | 1039 | fc_rport_enter_prli(rdata); |
9f9504a7 HR |
1040 | } else { |
1041 | struct fc_els_ls_rjt *rjt; | |
42e9a92f | 1042 | |
9f9504a7 HR |
1043 | rjt = fc_frame_payload_get(fp, sizeof(*rjt)); |
1044 | FC_RPORT_DBG(rdata, "PLOGI ELS rejected, reason %x expl %x\n", | |
1045 | rjt->er_reason, rjt->er_explan); | |
1046 | fc_rport_error_retry(rdata, -FC_EX_ELS_RJT); | |
1047 | } | |
42e9a92f RL |
1048 | out: |
1049 | fc_frame_free(fp); | |
1050 | err: | |
1051 | mutex_unlock(&rdata->rp_mutex); | |
785141c6 | 1052 | put: |
944ef968 | 1053 | kref_put(&rdata->kref, fc_rport_destroy); |
42e9a92f RL |
1054 | } |
1055 | ||
e0335f67 MR |
1056 | static bool |
1057 | fc_rport_compatible_roles(struct fc_lport *lport, struct fc_rport_priv *rdata) | |
1058 | { | |
1059 | if (rdata->ids.roles == FC_PORT_ROLE_UNKNOWN) | |
1060 | return true; | |
1061 | if ((rdata->ids.roles & FC_PORT_ROLE_FCP_TARGET) && | |
1062 | (lport->service_params & FCP_SPPF_INIT_FCN)) | |
1063 | return true; | |
1064 | if ((rdata->ids.roles & FC_PORT_ROLE_FCP_INITIATOR) && | |
1065 | (lport->service_params & FCP_SPPF_TARG_FCN)) | |
1066 | return true; | |
1067 | return false; | |
1068 | } | |
1069 | ||
42e9a92f | 1070 | /** |
3a3b42bf RL |
1071 | * fc_rport_enter_plogi() - Send Port Login (PLOGI) request |
1072 | * @rdata: The remote port to send a PLOGI to | |
42e9a92f RL |
1073 | * |
1074 | * Locking Note: The rport lock is expected to be held before calling | |
1075 | * this routine. | |
4d2095cc HR |
1076 | * |
1077 | * Reference counting: increments kref when sending ELS | |
42e9a92f | 1078 | */ |
9fb9d328 | 1079 | static void fc_rport_enter_plogi(struct fc_rport_priv *rdata) |
42e9a92f | 1080 | { |
42e9a92f RL |
1081 | struct fc_lport *lport = rdata->local_port; |
1082 | struct fc_frame *fp; | |
1083 | ||
e0335f67 MR |
1084 | if (!fc_rport_compatible_roles(lport, rdata)) { |
1085 | FC_RPORT_DBG(rdata, "PLOGI suppressed for incompatible role\n"); | |
1086 | fc_rport_state_enter(rdata, RPORT_ST_PLOGI_WAIT); | |
1087 | return; | |
1088 | } | |
1089 | ||
9fb9d328 JE |
1090 | FC_RPORT_DBG(rdata, "Port entered PLOGI state from %s state\n", |
1091 | fc_rport_state(rdata)); | |
42e9a92f | 1092 | |
9fb9d328 | 1093 | fc_rport_state_enter(rdata, RPORT_ST_PLOGI); |
42e9a92f | 1094 | |
f211fa51 | 1095 | rdata->maxframe_size = FC_MIN_MAX_PAYLOAD; |
42e9a92f RL |
1096 | fp = fc_frame_alloc(lport, sizeof(struct fc_els_flogi)); |
1097 | if (!fp) { | |
a7b12a27 | 1098 | FC_RPORT_DBG(rdata, "%s frame alloc failed\n", __func__); |
9f9504a7 | 1099 | fc_rport_error_retry(rdata, -FC_EX_ALLOC_ERR); |
42e9a92f RL |
1100 | return; |
1101 | } | |
1102 | rdata->e_d_tov = lport->e_d_tov; | |
1103 | ||
4d2095cc | 1104 | kref_get(&rdata->kref); |
f211fa51 | 1105 | if (!lport->tt.elsct_send(lport, rdata->ids.port_id, fp, ELS_PLOGI, |
b94f8951 | 1106 | fc_rport_plogi_resp, rdata, |
4d2095cc | 1107 | 2 * lport->r_a_tov)) { |
9f9504a7 | 1108 | fc_rport_error_retry(rdata, -FC_EX_XMIT_ERR); |
944ef968 | 1109 | kref_put(&rdata->kref, fc_rport_destroy); |
4d2095cc | 1110 | } |
42e9a92f RL |
1111 | } |
1112 | ||
1113 | /** | |
34f42a07 | 1114 | * fc_rport_prli_resp() - Process Login (PRLI) response handler |
3a3b42bf RL |
1115 | * @sp: The sequence the PRLI response was on |
1116 | * @fp: The PRLI response frame | |
1117 | * @rdata_arg: The remote port that sent the PRLI response | |
42e9a92f RL |
1118 | * |
1119 | * Locking Note: This function will be called without the rport lock | |
1120 | * held, but it will lock, call an _enter_* function or fc_rport_error | |
1121 | * and then unlock the rport. | |
1122 | */ | |
1123 | static void fc_rport_prli_resp(struct fc_seq *sp, struct fc_frame *fp, | |
9fb9d328 | 1124 | void *rdata_arg) |
42e9a92f | 1125 | { |
9fb9d328 | 1126 | struct fc_rport_priv *rdata = rdata_arg; |
42e9a92f RL |
1127 | struct { |
1128 | struct fc_els_prli prli; | |
1129 | struct fc_els_spp spp; | |
1130 | } *pp; | |
925cedae | 1131 | struct fc_els_spp temp_spp; |
57d3ec7e | 1132 | struct fc_els_ls_rjt *rjt; |
925cedae | 1133 | struct fc4_prov *prov; |
42e9a92f RL |
1134 | u32 roles = FC_RPORT_ROLE_UNKNOWN; |
1135 | u32 fcp_parm = 0; | |
1136 | u8 op; | |
386b97b4 | 1137 | enum fc_els_spp_resp resp_code; |
42e9a92f | 1138 | |
f657d299 | 1139 | FC_RPORT_DBG(rdata, "Received a PRLI %s\n", fc_els_resp_type(fp)); |
42e9a92f | 1140 | |
785141c6 CD |
1141 | if (fp == ERR_PTR(-FC_EX_CLOSED)) |
1142 | goto put; | |
1143 | ||
1144 | mutex_lock(&rdata->rp_mutex); | |
1145 | ||
42e9a92f | 1146 | if (rdata->rp_state != RPORT_ST_PRLI) { |
9fb9d328 JE |
1147 | FC_RPORT_DBG(rdata, "Received a PRLI response, but in state " |
1148 | "%s\n", fc_rport_state(rdata)); | |
76f6804e AJ |
1149 | if (IS_ERR(fp)) |
1150 | goto err; | |
42e9a92f RL |
1151 | goto out; |
1152 | } | |
1153 | ||
76f6804e | 1154 | if (IS_ERR(fp)) { |
9f9504a7 | 1155 | fc_rport_error_retry(rdata, PTR_ERR(fp)); |
76f6804e AJ |
1156 | goto err; |
1157 | } | |
1158 | ||
6bd054cb RL |
1159 | /* reinitialize remote port roles */ |
1160 | rdata->ids.roles = FC_RPORT_ROLE_UNKNOWN; | |
1161 | ||
42e9a92f RL |
1162 | op = fc_frame_payload_op(fp); |
1163 | if (op == ELS_LS_ACC) { | |
1164 | pp = fc_frame_payload_get(fp, sizeof(*pp)); | |
618461c0 BPG |
1165 | if (!pp) |
1166 | goto out; | |
1167 | ||
1168 | resp_code = (pp->spp.spp_flags & FC_SPP_RESP_MASK); | |
386b97b4 HR |
1169 | FC_RPORT_DBG(rdata, "PRLI spp_flags = 0x%x spp_type 0x%x\n", |
1170 | pp->spp.spp_flags, pp->spp.spp_type); | |
75a2792d | 1171 | rdata->spp_type = pp->spp.spp_type; |
618461c0 BPG |
1172 | if (resp_code != FC_SPP_RESP_ACK) { |
1173 | if (resp_code == FC_SPP_RESP_CONF) | |
9f9504a7 | 1174 | fc_rport_error(rdata, -FC_EX_SEQ_ERR); |
618461c0 | 1175 | else |
9f9504a7 | 1176 | fc_rport_error_retry(rdata, -FC_EX_SEQ_ERR); |
618461c0 | 1177 | goto out; |
42e9a92f | 1178 | } |
618461c0 BPG |
1179 | if (pp->prli.prli_spp_len < sizeof(pp->spp)) |
1180 | goto out; | |
1181 | ||
1182 | fcp_parm = ntohl(pp->spp.spp_params); | |
1183 | if (fcp_parm & FCP_SPPF_RETRY) | |
1184 | rdata->flags |= FC_RP_FLAGS_RETRY; | |
75a2792d BPG |
1185 | if (fcp_parm & FCP_SPPF_CONF_COMPL) |
1186 | rdata->flags |= FC_RP_FLAGS_CONF_REQ; | |
42e9a92f | 1187 | |
386b97b4 HR |
1188 | /* |
1189 | * Call prli provider if we should act as a target | |
1190 | */ | |
1191 | prov = fc_passive_prov[rdata->spp_type]; | |
925cedae JE |
1192 | if (prov) { |
1193 | memset(&temp_spp, 0, sizeof(temp_spp)); | |
1194 | prov->prli(rdata, pp->prli.prli_spp_len, | |
1195 | &pp->spp, &temp_spp); | |
1196 | } | |
386b97b4 HR |
1197 | /* |
1198 | * Check if the image pair could be established | |
1199 | */ | |
1200 | if (rdata->spp_type != FC_TYPE_FCP || | |
386b97b4 HR |
1201 | !(pp->spp.spp_flags & FC_SPP_EST_IMG_PAIR)) { |
1202 | /* | |
1203 | * Nope; we can't use this port as a target. | |
1204 | */ | |
1205 | fcp_parm &= ~FCP_SPPF_TARG_FCN; | |
1206 | } | |
f211fa51 | 1207 | rdata->supported_classes = FC_COS_CLASS3; |
42e9a92f RL |
1208 | if (fcp_parm & FCP_SPPF_INIT_FCN) |
1209 | roles |= FC_RPORT_ROLE_FCP_INITIATOR; | |
1210 | if (fcp_parm & FCP_SPPF_TARG_FCN) | |
1211 | roles |= FC_RPORT_ROLE_FCP_TARGET; | |
1212 | ||
f211fa51 | 1213 | rdata->ids.roles = roles; |
9fb9d328 | 1214 | fc_rport_enter_rtv(rdata); |
42e9a92f RL |
1215 | |
1216 | } else { | |
57d3ec7e HR |
1217 | rjt = fc_frame_payload_get(fp, sizeof(*rjt)); |
1218 | FC_RPORT_DBG(rdata, "PRLI ELS rejected, reason %x expl %x\n", | |
1219 | rjt->er_reason, rjt->er_explan); | |
9f9504a7 | 1220 | fc_rport_error_retry(rdata, FC_EX_ELS_RJT); |
42e9a92f RL |
1221 | } |
1222 | ||
1223 | out: | |
1224 | fc_frame_free(fp); | |
1225 | err: | |
1226 | mutex_unlock(&rdata->rp_mutex); | |
785141c6 | 1227 | put: |
944ef968 | 1228 | kref_put(&rdata->kref, fc_rport_destroy); |
42e9a92f RL |
1229 | } |
1230 | ||
42e9a92f | 1231 | /** |
3a3b42bf RL |
1232 | * fc_rport_enter_prli() - Send Process Login (PRLI) request |
1233 | * @rdata: The remote port to send the PRLI request to | |
42e9a92f RL |
1234 | * |
1235 | * Locking Note: The rport lock is expected to be held before calling | |
1236 | * this routine. | |
4d2095cc HR |
1237 | * |
1238 | * Reference counting: increments kref when sending ELS | |
42e9a92f | 1239 | */ |
9fb9d328 | 1240 | static void fc_rport_enter_prli(struct fc_rport_priv *rdata) |
42e9a92f | 1241 | { |
42e9a92f RL |
1242 | struct fc_lport *lport = rdata->local_port; |
1243 | struct { | |
1244 | struct fc_els_prli prli; | |
1245 | struct fc_els_spp spp; | |
1246 | } *pp; | |
1247 | struct fc_frame *fp; | |
925cedae | 1248 | struct fc4_prov *prov; |
42e9a92f | 1249 | |
3ac6f98f JE |
1250 | /* |
1251 | * If the rport is one of the well known addresses | |
1252 | * we skip PRLI and RTV and go straight to READY. | |
1253 | */ | |
1254 | if (rdata->ids.port_id >= FC_FID_DOM_MGR) { | |
1255 | fc_rport_enter_ready(rdata); | |
1256 | return; | |
1257 | } | |
1258 | ||
386b97b4 HR |
1259 | /* |
1260 | * And if the local port does not support the initiator function | |
1261 | * there's no need to send a PRLI, either. | |
1262 | */ | |
1263 | if (!(lport->service_params & FCP_SPPF_INIT_FCN)) { | |
1264 | fc_rport_enter_ready(rdata); | |
1265 | return; | |
1266 | } | |
1267 | ||
9fb9d328 JE |
1268 | FC_RPORT_DBG(rdata, "Port entered PRLI state from %s state\n", |
1269 | fc_rport_state(rdata)); | |
42e9a92f | 1270 | |
9fb9d328 | 1271 | fc_rport_state_enter(rdata, RPORT_ST_PRLI); |
42e9a92f RL |
1272 | |
1273 | fp = fc_frame_alloc(lport, sizeof(*pp)); | |
1274 | if (!fp) { | |
9f9504a7 | 1275 | fc_rport_error_retry(rdata, -FC_EX_ALLOC_ERR); |
42e9a92f RL |
1276 | return; |
1277 | } | |
1278 | ||
925cedae JE |
1279 | fc_prli_fill(lport, fp); |
1280 | ||
1281 | prov = fc_passive_prov[FC_TYPE_FCP]; | |
1282 | if (prov) { | |
1283 | pp = fc_frame_payload_get(fp, sizeof(*pp)); | |
1284 | prov->prli(rdata, sizeof(pp->spp), NULL, &pp->spp); | |
1285 | } | |
1286 | ||
1287 | fc_fill_fc_hdr(fp, FC_RCTL_ELS_REQ, rdata->ids.port_id, | |
1288 | fc_host_port_id(lport->host), FC_TYPE_ELS, | |
1289 | FC_FC_FIRST_SEQ | FC_FC_END_SEQ | FC_FC_SEQ_INIT, 0); | |
1290 | ||
4d2095cc | 1291 | kref_get(&rdata->kref); |
3afd2d15 HR |
1292 | if (!fc_exch_seq_send(lport, fp, fc_rport_prli_resp, |
1293 | NULL, rdata, 2 * lport->r_a_tov)) { | |
9f9504a7 | 1294 | fc_rport_error_retry(rdata, -FC_EX_XMIT_ERR); |
944ef968 | 1295 | kref_put(&rdata->kref, fc_rport_destroy); |
4d2095cc | 1296 | } |
42e9a92f RL |
1297 | } |
1298 | ||
1299 | /** | |
7c5a51b8 | 1300 | * fc_rport_rtv_resp() - Handler for Request Timeout Value (RTV) responses |
3a3b42bf RL |
1301 | * @sp: The sequence the RTV was on |
1302 | * @fp: The RTV response frame | |
1303 | * @rdata_arg: The remote port that sent the RTV response | |
42e9a92f RL |
1304 | * |
1305 | * Many targets don't seem to support this. | |
1306 | * | |
1307 | * Locking Note: This function will be called without the rport lock | |
1308 | * held, but it will lock, call an _enter_* function or fc_rport_error | |
1309 | * and then unlock the rport. | |
1310 | */ | |
1311 | static void fc_rport_rtv_resp(struct fc_seq *sp, struct fc_frame *fp, | |
9fb9d328 | 1312 | void *rdata_arg) |
42e9a92f | 1313 | { |
9fb9d328 | 1314 | struct fc_rport_priv *rdata = rdata_arg; |
42e9a92f RL |
1315 | u8 op; |
1316 | ||
f657d299 | 1317 | FC_RPORT_DBG(rdata, "Received a RTV %s\n", fc_els_resp_type(fp)); |
42e9a92f | 1318 | |
785141c6 CD |
1319 | if (fp == ERR_PTR(-FC_EX_CLOSED)) |
1320 | goto put; | |
1321 | ||
1322 | mutex_lock(&rdata->rp_mutex); | |
1323 | ||
42e9a92f | 1324 | if (rdata->rp_state != RPORT_ST_RTV) { |
9fb9d328 JE |
1325 | FC_RPORT_DBG(rdata, "Received a RTV response, but in state " |
1326 | "%s\n", fc_rport_state(rdata)); | |
76f6804e AJ |
1327 | if (IS_ERR(fp)) |
1328 | goto err; | |
42e9a92f RL |
1329 | goto out; |
1330 | } | |
1331 | ||
76f6804e | 1332 | if (IS_ERR(fp)) { |
9f9504a7 | 1333 | fc_rport_error(rdata, PTR_ERR(fp)); |
76f6804e AJ |
1334 | goto err; |
1335 | } | |
1336 | ||
42e9a92f RL |
1337 | op = fc_frame_payload_op(fp); |
1338 | if (op == ELS_LS_ACC) { | |
1339 | struct fc_els_rtv_acc *rtv; | |
1340 | u32 toq; | |
1341 | u32 tov; | |
1342 | ||
1343 | rtv = fc_frame_payload_get(fp, sizeof(*rtv)); | |
1344 | if (rtv) { | |
1345 | toq = ntohl(rtv->rtv_toq); | |
1346 | tov = ntohl(rtv->rtv_r_a_tov); | |
1347 | if (tov == 0) | |
1348 | tov = 1; | |
76e72ad1 HR |
1349 | if (tov > rdata->r_a_tov) |
1350 | rdata->r_a_tov = tov; | |
42e9a92f RL |
1351 | tov = ntohl(rtv->rtv_e_d_tov); |
1352 | if (toq & FC_ELS_RTV_EDRES) | |
1353 | tov /= 1000000; | |
1354 | if (tov == 0) | |
1355 | tov = 1; | |
76e72ad1 HR |
1356 | if (tov > rdata->e_d_tov) |
1357 | rdata->e_d_tov = tov; | |
42e9a92f RL |
1358 | } |
1359 | } | |
1360 | ||
9fb9d328 | 1361 | fc_rport_enter_ready(rdata); |
42e9a92f RL |
1362 | |
1363 | out: | |
1364 | fc_frame_free(fp); | |
1365 | err: | |
1366 | mutex_unlock(&rdata->rp_mutex); | |
785141c6 | 1367 | put: |
944ef968 | 1368 | kref_put(&rdata->kref, fc_rport_destroy); |
42e9a92f RL |
1369 | } |
1370 | ||
1371 | /** | |
3a3b42bf RL |
1372 | * fc_rport_enter_rtv() - Send Request Timeout Value (RTV) request |
1373 | * @rdata: The remote port to send the RTV request to | |
42e9a92f RL |
1374 | * |
1375 | * Locking Note: The rport lock is expected to be held before calling | |
1376 | * this routine. | |
4d2095cc HR |
1377 | * |
1378 | * Reference counting: increments kref when sending ELS | |
42e9a92f | 1379 | */ |
9fb9d328 | 1380 | static void fc_rport_enter_rtv(struct fc_rport_priv *rdata) |
42e9a92f RL |
1381 | { |
1382 | struct fc_frame *fp; | |
42e9a92f RL |
1383 | struct fc_lport *lport = rdata->local_port; |
1384 | ||
9fb9d328 JE |
1385 | FC_RPORT_DBG(rdata, "Port entered RTV state from %s state\n", |
1386 | fc_rport_state(rdata)); | |
42e9a92f | 1387 | |
9fb9d328 | 1388 | fc_rport_state_enter(rdata, RPORT_ST_RTV); |
42e9a92f RL |
1389 | |
1390 | fp = fc_frame_alloc(lport, sizeof(struct fc_els_rtv)); | |
1391 | if (!fp) { | |
9f9504a7 | 1392 | fc_rport_error_retry(rdata, -FC_EX_ALLOC_ERR); |
42e9a92f RL |
1393 | return; |
1394 | } | |
1395 | ||
4d2095cc | 1396 | kref_get(&rdata->kref); |
f211fa51 | 1397 | if (!lport->tt.elsct_send(lport, rdata->ids.port_id, fp, ELS_RTV, |
b94f8951 | 1398 | fc_rport_rtv_resp, rdata, |
4d2095cc | 1399 | 2 * lport->r_a_tov)) { |
9f9504a7 | 1400 | fc_rport_error_retry(rdata, -FC_EX_XMIT_ERR); |
944ef968 | 1401 | kref_put(&rdata->kref, fc_rport_destroy); |
4d2095cc | 1402 | } |
42e9a92f RL |
1403 | } |
1404 | ||
7c5a51b8 HR |
1405 | /** |
1406 | * fc_rport_recv_rtv_req() - Handler for Read Timeout Value (RTV) requests | |
1407 | * @rdata: The remote port that sent the RTV request | |
1408 | * @in_fp: The RTV request frame | |
1409 | * | |
1410 | * Locking Note: Called with the lport and rport locks held. | |
1411 | */ | |
1412 | static void fc_rport_recv_rtv_req(struct fc_rport_priv *rdata, | |
1413 | struct fc_frame *in_fp) | |
1414 | { | |
1415 | struct fc_lport *lport = rdata->local_port; | |
1416 | struct fc_frame *fp; | |
1417 | struct fc_els_rtv_acc *rtv; | |
1418 | struct fc_seq_els_data rjt_data; | |
1419 | ||
1420 | FC_RPORT_DBG(rdata, "Received RTV request\n"); | |
1421 | ||
1422 | fp = fc_frame_alloc(lport, sizeof(*rtv)); | |
1423 | if (!fp) { | |
1424 | rjt_data.reason = ELS_RJT_UNAB; | |
dd6e1f71 | 1425 | rjt_data.explan = ELS_EXPL_INSUF_RES; |
7ab24dd1 | 1426 | fc_seq_els_rsp_send(in_fp, ELS_LS_RJT, &rjt_data); |
7c5a51b8 HR |
1427 | goto drop; |
1428 | } | |
1429 | rtv = fc_frame_payload_get(fp, sizeof(*rtv)); | |
1430 | rtv->rtv_cmd = ELS_LS_ACC; | |
1431 | rtv->rtv_r_a_tov = htonl(lport->r_a_tov); | |
1432 | rtv->rtv_e_d_tov = htonl(lport->e_d_tov); | |
1433 | rtv->rtv_toq = 0; | |
1434 | fc_fill_reply_hdr(fp, in_fp, FC_RCTL_ELS_REP, 0); | |
1435 | lport->tt.frame_send(lport, fp); | |
1436 | drop: | |
1437 | fc_frame_free(in_fp); | |
1438 | } | |
1439 | ||
079ecd8c JE |
1440 | /** |
1441 | * fc_rport_logo_resp() - Handler for logout (LOGO) responses | |
1442 | * @sp: The sequence the LOGO was on | |
1443 | * @fp: The LOGO response frame | |
1444 | * @lport_arg: The local port | |
1445 | */ | |
1446 | static void fc_rport_logo_resp(struct fc_seq *sp, struct fc_frame *fp, | |
4d2095cc | 1447 | void *rdata_arg) |
079ecd8c | 1448 | { |
4d2095cc HR |
1449 | struct fc_rport_priv *rdata = rdata_arg; |
1450 | struct fc_lport *lport = rdata->local_port; | |
079ecd8c JE |
1451 | |
1452 | FC_RPORT_ID_DBG(lport, fc_seq_exch(sp)->did, | |
1453 | "Received a LOGO %s\n", fc_els_resp_type(fp)); | |
4d2095cc HR |
1454 | if (!IS_ERR(fp)) |
1455 | fc_frame_free(fp); | |
944ef968 | 1456 | kref_put(&rdata->kref, fc_rport_destroy); |
079ecd8c JE |
1457 | } |
1458 | ||
42e9a92f | 1459 | /** |
3a3b42bf RL |
1460 | * fc_rport_enter_logo() - Send a logout (LOGO) request |
1461 | * @rdata: The remote port to send the LOGO request to | |
42e9a92f RL |
1462 | * |
1463 | * Locking Note: The rport lock is expected to be held before calling | |
1464 | * this routine. | |
4d2095cc HR |
1465 | * |
1466 | * Reference counting: increments kref when sending ELS | |
42e9a92f | 1467 | */ |
9fb9d328 | 1468 | static void fc_rport_enter_logo(struct fc_rport_priv *rdata) |
42e9a92f | 1469 | { |
42e9a92f RL |
1470 | struct fc_lport *lport = rdata->local_port; |
1471 | struct fc_frame *fp; | |
1472 | ||
079ecd8c | 1473 | FC_RPORT_DBG(rdata, "Port sending LOGO from %s state\n", |
9fb9d328 | 1474 | fc_rport_state(rdata)); |
42e9a92f | 1475 | |
42e9a92f | 1476 | fp = fc_frame_alloc(lport, sizeof(struct fc_els_logo)); |
079ecd8c | 1477 | if (!fp) |
42e9a92f | 1478 | return; |
4d2095cc HR |
1479 | kref_get(&rdata->kref); |
1480 | if (!lport->tt.elsct_send(lport, rdata->ids.port_id, fp, ELS_LOGO, | |
1481 | fc_rport_logo_resp, rdata, 0)) | |
944ef968 | 1482 | kref_put(&rdata->kref, fc_rport_destroy); |
42e9a92f RL |
1483 | } |
1484 | ||
370c3bd0 | 1485 | /** |
3a3b42bf RL |
1486 | * fc_rport_els_adisc_resp() - Handler for Address Discovery (ADISC) responses |
1487 | * @sp: The sequence the ADISC response was on | |
1488 | * @fp: The ADISC response frame | |
1489 | * @rdata_arg: The remote port that sent the ADISC response | |
370c3bd0 JE |
1490 | * |
1491 | * Locking Note: This function will be called without the rport lock | |
1492 | * held, but it will lock, call an _enter_* function or fc_rport_error | |
1493 | * and then unlock the rport. | |
1494 | */ | |
1495 | static void fc_rport_adisc_resp(struct fc_seq *sp, struct fc_frame *fp, | |
3a3b42bf | 1496 | void *rdata_arg) |
370c3bd0 JE |
1497 | { |
1498 | struct fc_rport_priv *rdata = rdata_arg; | |
1499 | struct fc_els_adisc *adisc; | |
1500 | u8 op; | |
1501 | ||
370c3bd0 JE |
1502 | FC_RPORT_DBG(rdata, "Received a ADISC response\n"); |
1503 | ||
785141c6 CD |
1504 | if (fp == ERR_PTR(-FC_EX_CLOSED)) |
1505 | goto put; | |
1506 | ||
1507 | mutex_lock(&rdata->rp_mutex); | |
1508 | ||
370c3bd0 JE |
1509 | if (rdata->rp_state != RPORT_ST_ADISC) { |
1510 | FC_RPORT_DBG(rdata, "Received a ADISC resp but in state %s\n", | |
1511 | fc_rport_state(rdata)); | |
1512 | if (IS_ERR(fp)) | |
1513 | goto err; | |
1514 | goto out; | |
1515 | } | |
1516 | ||
1517 | if (IS_ERR(fp)) { | |
9f9504a7 | 1518 | fc_rport_error(rdata, PTR_ERR(fp)); |
370c3bd0 JE |
1519 | goto err; |
1520 | } | |
1521 | ||
1522 | /* | |
1523 | * If address verification failed. Consider us logged out of the rport. | |
1524 | * Since the rport is still in discovery, we want to be | |
1525 | * logged in, so go to PLOGI state. Otherwise, go back to READY. | |
1526 | */ | |
1527 | op = fc_frame_payload_op(fp); | |
1528 | adisc = fc_frame_payload_get(fp, sizeof(*adisc)); | |
1529 | if (op != ELS_LS_ACC || !adisc || | |
1530 | ntoh24(adisc->adisc_port_id) != rdata->ids.port_id || | |
1531 | get_unaligned_be64(&adisc->adisc_wwpn) != rdata->ids.port_name || | |
1532 | get_unaligned_be64(&adisc->adisc_wwnn) != rdata->ids.node_name) { | |
1533 | FC_RPORT_DBG(rdata, "ADISC error or mismatch\n"); | |
a7b12a27 | 1534 | fc_rport_enter_flogi(rdata); |
370c3bd0 JE |
1535 | } else { |
1536 | FC_RPORT_DBG(rdata, "ADISC OK\n"); | |
1537 | fc_rport_enter_ready(rdata); | |
1538 | } | |
1539 | out: | |
1540 | fc_frame_free(fp); | |
1541 | err: | |
1542 | mutex_unlock(&rdata->rp_mutex); | |
785141c6 | 1543 | put: |
944ef968 | 1544 | kref_put(&rdata->kref, fc_rport_destroy); |
370c3bd0 JE |
1545 | } |
1546 | ||
1547 | /** | |
3a3b42bf RL |
1548 | * fc_rport_enter_adisc() - Send Address Discover (ADISC) request |
1549 | * @rdata: The remote port to send the ADISC request to | |
370c3bd0 JE |
1550 | * |
1551 | * Locking Note: The rport lock is expected to be held before calling | |
1552 | * this routine. | |
4d2095cc HR |
1553 | * |
1554 | * Reference counting: increments kref when sending ELS | |
370c3bd0 JE |
1555 | */ |
1556 | static void fc_rport_enter_adisc(struct fc_rport_priv *rdata) | |
1557 | { | |
1558 | struct fc_lport *lport = rdata->local_port; | |
1559 | struct fc_frame *fp; | |
1560 | ||
1561 | FC_RPORT_DBG(rdata, "sending ADISC from %s state\n", | |
1562 | fc_rport_state(rdata)); | |
1563 | ||
1564 | fc_rport_state_enter(rdata, RPORT_ST_ADISC); | |
1565 | ||
1566 | fp = fc_frame_alloc(lport, sizeof(struct fc_els_adisc)); | |
1567 | if (!fp) { | |
9f9504a7 | 1568 | fc_rport_error_retry(rdata, -FC_EX_ALLOC_ERR); |
370c3bd0 JE |
1569 | return; |
1570 | } | |
4d2095cc | 1571 | kref_get(&rdata->kref); |
370c3bd0 | 1572 | if (!lport->tt.elsct_send(lport, rdata->ids.port_id, fp, ELS_ADISC, |
b94f8951 | 1573 | fc_rport_adisc_resp, rdata, |
4d2095cc | 1574 | 2 * lport->r_a_tov)) { |
9f9504a7 | 1575 | fc_rport_error_retry(rdata, -FC_EX_XMIT_ERR); |
944ef968 | 1576 | kref_put(&rdata->kref, fc_rport_destroy); |
4d2095cc | 1577 | } |
370c3bd0 JE |
1578 | } |
1579 | ||
8abbe3a4 | 1580 | /** |
3a3b42bf RL |
1581 | * fc_rport_recv_adisc_req() - Handler for Address Discovery (ADISC) requests |
1582 | * @rdata: The remote port that sent the ADISC request | |
3a3b42bf | 1583 | * @in_fp: The ADISC request frame |
8abbe3a4 JE |
1584 | * |
1585 | * Locking Note: Called with the lport and rport locks held. | |
1586 | */ | |
1587 | static void fc_rport_recv_adisc_req(struct fc_rport_priv *rdata, | |
92261156 | 1588 | struct fc_frame *in_fp) |
8abbe3a4 JE |
1589 | { |
1590 | struct fc_lport *lport = rdata->local_port; | |
1591 | struct fc_frame *fp; | |
8abbe3a4 JE |
1592 | struct fc_els_adisc *adisc; |
1593 | struct fc_seq_els_data rjt_data; | |
8abbe3a4 JE |
1594 | |
1595 | FC_RPORT_DBG(rdata, "Received ADISC request\n"); | |
1596 | ||
1597 | adisc = fc_frame_payload_get(in_fp, sizeof(*adisc)); | |
1598 | if (!adisc) { | |
8abbe3a4 JE |
1599 | rjt_data.reason = ELS_RJT_PROT; |
1600 | rjt_data.explan = ELS_EXPL_INV_LEN; | |
7ab24dd1 | 1601 | fc_seq_els_rsp_send(in_fp, ELS_LS_RJT, &rjt_data); |
8abbe3a4 JE |
1602 | goto drop; |
1603 | } | |
1604 | ||
1605 | fp = fc_frame_alloc(lport, sizeof(*adisc)); | |
1606 | if (!fp) | |
1607 | goto drop; | |
1608 | fc_adisc_fill(lport, fp); | |
1609 | adisc = fc_frame_payload_get(fp, sizeof(*adisc)); | |
1610 | adisc->adisc_cmd = ELS_LS_ACC; | |
24f089e2 JE |
1611 | fc_fill_reply_hdr(fp, in_fp, FC_RCTL_ELS_REP, 0); |
1612 | lport->tt.frame_send(lport, fp); | |
8abbe3a4 JE |
1613 | drop: |
1614 | fc_frame_free(in_fp); | |
1615 | } | |
1616 | ||
63e27fb8 YZ |
1617 | /** |
1618 | * fc_rport_recv_rls_req() - Handle received Read Link Status request | |
1619 | * @rdata: The remote port that sent the RLS request | |
63e27fb8 YZ |
1620 | * @rx_fp: The PRLI request frame |
1621 | * | |
1622 | * Locking Note: The rport lock is expected to be held before calling | |
1623 | * this function. | |
1624 | */ | |
1625 | static void fc_rport_recv_rls_req(struct fc_rport_priv *rdata, | |
92261156 | 1626 | struct fc_frame *rx_fp) |
63e27fb8 YZ |
1627 | |
1628 | { | |
1629 | struct fc_lport *lport = rdata->local_port; | |
1630 | struct fc_frame *fp; | |
63e27fb8 YZ |
1631 | struct fc_els_rls *rls; |
1632 | struct fc_els_rls_resp *rsp; | |
1633 | struct fc_els_lesb *lesb; | |
1634 | struct fc_seq_els_data rjt_data; | |
1635 | struct fc_host_statistics *hst; | |
63e27fb8 YZ |
1636 | |
1637 | FC_RPORT_DBG(rdata, "Received RLS request while in state %s\n", | |
1638 | fc_rport_state(rdata)); | |
1639 | ||
1640 | rls = fc_frame_payload_get(rx_fp, sizeof(*rls)); | |
1641 | if (!rls) { | |
1642 | rjt_data.reason = ELS_RJT_PROT; | |
1643 | rjt_data.explan = ELS_EXPL_INV_LEN; | |
1644 | goto out_rjt; | |
1645 | } | |
1646 | ||
1647 | fp = fc_frame_alloc(lport, sizeof(*rsp)); | |
1648 | if (!fp) { | |
1649 | rjt_data.reason = ELS_RJT_UNAB; | |
1650 | rjt_data.explan = ELS_EXPL_INSUF_RES; | |
1651 | goto out_rjt; | |
1652 | } | |
1653 | ||
1654 | rsp = fc_frame_payload_get(fp, sizeof(*rsp)); | |
1655 | memset(rsp, 0, sizeof(*rsp)); | |
1656 | rsp->rls_cmd = ELS_LS_ACC; | |
1657 | lesb = &rsp->rls_lesb; | |
1658 | if (lport->tt.get_lesb) { | |
1659 | /* get LESB from LLD if it supports it */ | |
1660 | lport->tt.get_lesb(lport, lesb); | |
1661 | } else { | |
1662 | fc_get_host_stats(lport->host); | |
1663 | hst = &lport->host_stats; | |
1664 | lesb->lesb_link_fail = htonl(hst->link_failure_count); | |
1665 | lesb->lesb_sync_loss = htonl(hst->loss_of_sync_count); | |
1666 | lesb->lesb_sig_loss = htonl(hst->loss_of_signal_count); | |
1667 | lesb->lesb_prim_err = htonl(hst->prim_seq_protocol_err_count); | |
1668 | lesb->lesb_inv_word = htonl(hst->invalid_tx_word_count); | |
1669 | lesb->lesb_inv_crc = htonl(hst->invalid_crc_count); | |
1670 | } | |
1671 | ||
24f089e2 JE |
1672 | fc_fill_reply_hdr(fp, rx_fp, FC_RCTL_ELS_REP, 0); |
1673 | lport->tt.frame_send(lport, fp); | |
63e27fb8 YZ |
1674 | goto out; |
1675 | ||
1676 | out_rjt: | |
7ab24dd1 | 1677 | fc_seq_els_rsp_send(rx_fp, ELS_LS_RJT, &rjt_data); |
63e27fb8 YZ |
1678 | out: |
1679 | fc_frame_free(rx_fp); | |
1680 | } | |
1681 | ||
42e9a92f | 1682 | /** |
3a3b42bf RL |
1683 | * fc_rport_recv_els_req() - Handler for validated ELS requests |
1684 | * @lport: The local port that received the ELS request | |
3a3b42bf | 1685 | * @fp: The ELS request frame |
83fe6a93 JE |
1686 | * |
1687 | * Handle incoming ELS requests that require port login. | |
1688 | * The ELS opcode has already been validated by the caller. | |
42e9a92f | 1689 | * |
131203a1 | 1690 | * Locking Note: Called with the lport lock held. |
4d2095cc HR |
1691 | * |
1692 | * Reference counting: does not modify kref | |
42e9a92f | 1693 | */ |
92261156 | 1694 | static void fc_rport_recv_els_req(struct fc_lport *lport, struct fc_frame *fp) |
42e9a92f | 1695 | { |
131203a1 | 1696 | struct fc_rport_priv *rdata; |
42e9a92f | 1697 | struct fc_seq_els_data els_data; |
42e9a92f | 1698 | |
e87b7777 | 1699 | rdata = fc_rport_lookup(lport, fc_frame_sid(fp)); |
57d3ec7e HR |
1700 | if (!rdata) { |
1701 | FC_RPORT_ID_DBG(lport, fc_frame_sid(fp), | |
1702 | "Received ELS 0x%02x from non-logged-in port\n", | |
1703 | fc_frame_payload_op(fp)); | |
83fe6a93 | 1704 | goto reject; |
57d3ec7e | 1705 | } |
baa6719f | 1706 | |
131203a1 JE |
1707 | mutex_lock(&rdata->rp_mutex); |
1708 | ||
83fe6a93 JE |
1709 | switch (rdata->rp_state) { |
1710 | case RPORT_ST_PRLI: | |
1711 | case RPORT_ST_RTV: | |
1712 | case RPORT_ST_READY: | |
370c3bd0 | 1713 | case RPORT_ST_ADISC: |
83fe6a93 | 1714 | break; |
8acf1b50 HR |
1715 | case RPORT_ST_PLOGI: |
1716 | if (fc_frame_payload_op(fp) == ELS_PRLI) { | |
1717 | FC_RPORT_DBG(rdata, "Reject ELS PRLI " | |
1718 | "while in state %s\n", | |
1719 | fc_rport_state(rdata)); | |
1720 | mutex_unlock(&rdata->rp_mutex); | |
944ef968 | 1721 | kref_put(&rdata->kref, fc_rport_destroy); |
8acf1b50 HR |
1722 | goto busy; |
1723 | } | |
83fe6a93 | 1724 | default: |
57d3ec7e HR |
1725 | FC_RPORT_DBG(rdata, |
1726 | "Reject ELS 0x%02x while in state %s\n", | |
1727 | fc_frame_payload_op(fp), fc_rport_state(rdata)); | |
83fe6a93 | 1728 | mutex_unlock(&rdata->rp_mutex); |
944ef968 | 1729 | kref_put(&rdata->kref, fc_rport_destroy); |
83fe6a93 JE |
1730 | goto reject; |
1731 | } | |
1732 | ||
1733 | switch (fc_frame_payload_op(fp)) { | |
131203a1 | 1734 | case ELS_PRLI: |
92261156 | 1735 | fc_rport_recv_prli_req(rdata, fp); |
131203a1 JE |
1736 | break; |
1737 | case ELS_PRLO: | |
92261156 | 1738 | fc_rport_recv_prlo_req(rdata, fp); |
131203a1 | 1739 | break; |
8abbe3a4 | 1740 | case ELS_ADISC: |
92261156 | 1741 | fc_rport_recv_adisc_req(rdata, fp); |
8abbe3a4 | 1742 | break; |
131203a1 | 1743 | case ELS_RRQ: |
7ab24dd1 | 1744 | fc_seq_els_rsp_send(fp, ELS_RRQ, NULL); |
92261156 | 1745 | fc_frame_free(fp); |
131203a1 JE |
1746 | break; |
1747 | case ELS_REC: | |
7ab24dd1 | 1748 | fc_seq_els_rsp_send(fp, ELS_REC, NULL); |
92261156 | 1749 | fc_frame_free(fp); |
131203a1 | 1750 | break; |
63e27fb8 | 1751 | case ELS_RLS: |
92261156 | 1752 | fc_rport_recv_rls_req(rdata, fp); |
63e27fb8 | 1753 | break; |
7c5a51b8 HR |
1754 | case ELS_RTV: |
1755 | fc_rport_recv_rtv_req(rdata, fp); | |
1756 | break; | |
131203a1 | 1757 | default: |
83fe6a93 | 1758 | fc_frame_free(fp); /* can't happen */ |
131203a1 | 1759 | break; |
42e9a92f RL |
1760 | } |
1761 | ||
1762 | mutex_unlock(&rdata->rp_mutex); | |
944ef968 | 1763 | kref_put(&rdata->kref, fc_rport_destroy); |
83fe6a93 JE |
1764 | return; |
1765 | ||
1766 | reject: | |
92261156 JE |
1767 | els_data.reason = ELS_RJT_UNAB; |
1768 | els_data.explan = ELS_EXPL_PLOGI_REQD; | |
7ab24dd1 | 1769 | fc_seq_els_rsp_send(fp, ELS_LS_RJT, &els_data); |
83fe6a93 | 1770 | fc_frame_free(fp); |
8acf1b50 HR |
1771 | return; |
1772 | ||
1773 | busy: | |
1774 | els_data.reason = ELS_RJT_BUSY; | |
1775 | els_data.explan = ELS_EXPL_NONE; | |
7ab24dd1 | 1776 | fc_seq_els_rsp_send(fp, ELS_LS_RJT, &els_data); |
8acf1b50 HR |
1777 | fc_frame_free(fp); |
1778 | return; | |
83fe6a93 JE |
1779 | } |
1780 | ||
1781 | /** | |
3a3b42bf | 1782 | * fc_rport_recv_req() - Handler for requests |
3a3b42bf | 1783 | * @lport: The local port that received the request |
92261156 | 1784 | * @fp: The request frame |
83fe6a93 JE |
1785 | * |
1786 | * Locking Note: Called with the lport lock held. | |
4d2095cc HR |
1787 | * |
1788 | * Reference counting: does not modify kref | |
83fe6a93 | 1789 | */ |
e76ee65f | 1790 | void fc_rport_recv_req(struct fc_lport *lport, struct fc_frame *fp) |
83fe6a93 JE |
1791 | { |
1792 | struct fc_seq_els_data els_data; | |
1793 | ||
1794 | /* | |
a7b12a27 | 1795 | * Handle FLOGI, PLOGI and LOGO requests separately, since they |
83fe6a93 JE |
1796 | * don't require prior login. |
1797 | * Check for unsupported opcodes first and reject them. | |
1798 | * For some ops, it would be incorrect to reject with "PLOGI required". | |
1799 | */ | |
1800 | switch (fc_frame_payload_op(fp)) { | |
a7b12a27 | 1801 | case ELS_FLOGI: |
92261156 | 1802 | fc_rport_recv_flogi_req(lport, fp); |
a7b12a27 | 1803 | break; |
83fe6a93 | 1804 | case ELS_PLOGI: |
92261156 | 1805 | fc_rport_recv_plogi_req(lport, fp); |
83fe6a93 JE |
1806 | break; |
1807 | case ELS_LOGO: | |
92261156 | 1808 | fc_rport_recv_logo_req(lport, fp); |
83fe6a93 JE |
1809 | break; |
1810 | case ELS_PRLI: | |
1811 | case ELS_PRLO: | |
8abbe3a4 | 1812 | case ELS_ADISC: |
83fe6a93 JE |
1813 | case ELS_RRQ: |
1814 | case ELS_REC: | |
63e27fb8 | 1815 | case ELS_RLS: |
7c5a51b8 | 1816 | case ELS_RTV: |
92261156 | 1817 | fc_rport_recv_els_req(lport, fp); |
83fe6a93 JE |
1818 | break; |
1819 | default: | |
83fe6a93 JE |
1820 | els_data.reason = ELS_RJT_UNSUP; |
1821 | els_data.explan = ELS_EXPL_NONE; | |
7ab24dd1 | 1822 | fc_seq_els_rsp_send(fp, ELS_LS_RJT, &els_data); |
92261156 | 1823 | fc_frame_free(fp); |
83fe6a93 JE |
1824 | break; |
1825 | } | |
42e9a92f | 1826 | } |
e76ee65f | 1827 | EXPORT_SYMBOL(fc_rport_recv_req); |
42e9a92f RL |
1828 | |
1829 | /** | |
3a3b42bf RL |
1830 | * fc_rport_recv_plogi_req() - Handler for Port Login (PLOGI) requests |
1831 | * @lport: The local port that received the PLOGI request | |
3a3b42bf | 1832 | * @rx_fp: The PLOGI request frame |
42e9a92f | 1833 | * |
3ac6f98f | 1834 | * Locking Note: The rport lock is held before calling this function. |
4d2095cc HR |
1835 | * |
1836 | * Reference counting: increments kref on return | |
42e9a92f | 1837 | */ |
3ac6f98f | 1838 | static void fc_rport_recv_plogi_req(struct fc_lport *lport, |
92261156 | 1839 | struct fc_frame *rx_fp) |
42e9a92f | 1840 | { |
3ac6f98f JE |
1841 | struct fc_disc *disc; |
1842 | struct fc_rport_priv *rdata; | |
42e9a92f | 1843 | struct fc_frame *fp = rx_fp; |
42e9a92f RL |
1844 | struct fc_els_flogi *pl; |
1845 | struct fc_seq_els_data rjt_data; | |
24f089e2 | 1846 | u32 sid; |
42e9a92f | 1847 | |
251748a9 | 1848 | sid = fc_frame_sid(fp); |
42e9a92f | 1849 | |
3ac6f98f | 1850 | FC_RPORT_ID_DBG(lport, sid, "Received PLOGI request\n"); |
42e9a92f | 1851 | |
42e9a92f RL |
1852 | pl = fc_frame_payload_get(fp, sizeof(*pl)); |
1853 | if (!pl) { | |
3ac6f98f JE |
1854 | FC_RPORT_ID_DBG(lport, sid, "Received PLOGI too short\n"); |
1855 | rjt_data.reason = ELS_RJT_PROT; | |
1856 | rjt_data.explan = ELS_EXPL_INV_LEN; | |
1857 | goto reject; | |
42e9a92f | 1858 | } |
3ac6f98f JE |
1859 | |
1860 | disc = &lport->disc; | |
1861 | mutex_lock(&disc->disc_mutex); | |
2580064b | 1862 | rdata = fc_rport_create(lport, sid); |
3ac6f98f JE |
1863 | if (!rdata) { |
1864 | mutex_unlock(&disc->disc_mutex); | |
1865 | rjt_data.reason = ELS_RJT_UNAB; | |
1866 | rjt_data.explan = ELS_EXPL_INSUF_RES; | |
1867 | goto reject; | |
1868 | } | |
1869 | ||
1870 | mutex_lock(&rdata->rp_mutex); | |
1871 | mutex_unlock(&disc->disc_mutex); | |
1872 | ||
1873 | rdata->ids.port_name = get_unaligned_be64(&pl->fl_wwpn); | |
1874 | rdata->ids.node_name = get_unaligned_be64(&pl->fl_wwnn); | |
42e9a92f RL |
1875 | |
1876 | /* | |
3ac6f98f | 1877 | * If the rport was just created, possibly due to the incoming PLOGI, |
42e9a92f RL |
1878 | * set the state appropriately and accept the PLOGI. |
1879 | * | |
1880 | * If we had also sent a PLOGI, and if the received PLOGI is from a | |
1881 | * higher WWPN, we accept it, otherwise an LS_RJT is sent with reason | |
1882 | * "command already in progress". | |
1883 | * | |
1884 | * XXX TBD: If the session was ready before, the PLOGI should result in | |
1885 | * all outstanding exchanges being reset. | |
1886 | */ | |
1887 | switch (rdata->rp_state) { | |
1888 | case RPORT_ST_INIT: | |
3ac6f98f | 1889 | FC_RPORT_DBG(rdata, "Received PLOGI in INIT state\n"); |
42e9a92f | 1890 | break; |
a7b12a27 JE |
1891 | case RPORT_ST_PLOGI_WAIT: |
1892 | FC_RPORT_DBG(rdata, "Received PLOGI in PLOGI_WAIT state\n"); | |
1893 | break; | |
42e9a92f | 1894 | case RPORT_ST_PLOGI: |
3ac6f98f JE |
1895 | FC_RPORT_DBG(rdata, "Received PLOGI in PLOGI state\n"); |
1896 | if (rdata->ids.port_name < lport->wwpn) { | |
1897 | mutex_unlock(&rdata->rp_mutex); | |
1898 | rjt_data.reason = ELS_RJT_INPROG; | |
1899 | rjt_data.explan = ELS_EXPL_NONE; | |
1900 | goto reject; | |
1901 | } | |
42e9a92f RL |
1902 | break; |
1903 | case RPORT_ST_PRLI: | |
b4a9c7ed | 1904 | case RPORT_ST_RTV: |
42e9a92f | 1905 | case RPORT_ST_READY: |
370c3bd0 JE |
1906 | case RPORT_ST_ADISC: |
1907 | FC_RPORT_DBG(rdata, "Received PLOGI in logged-in state %d " | |
1908 | "- ignored for now\n", rdata->rp_state); | |
1909 | /* XXX TBD - should reset */ | |
42e9a92f | 1910 | break; |
a7b12a27 | 1911 | case RPORT_ST_FLOGI: |
14194054 | 1912 | case RPORT_ST_DELETE: |
b4a9c7ed JE |
1913 | FC_RPORT_DBG(rdata, "Received PLOGI in state %s - send busy\n", |
1914 | fc_rport_state(rdata)); | |
1915 | mutex_unlock(&rdata->rp_mutex); | |
1916 | rjt_data.reason = ELS_RJT_BUSY; | |
1917 | rjt_data.explan = ELS_EXPL_NONE; | |
1918 | goto reject; | |
42e9a92f | 1919 | } |
e0335f67 MR |
1920 | if (!fc_rport_compatible_roles(lport, rdata)) { |
1921 | FC_RPORT_DBG(rdata, "Received PLOGI for incompatible role\n"); | |
1922 | mutex_unlock(&rdata->rp_mutex); | |
1923 | rjt_data.reason = ELS_RJT_LOGIC; | |
1924 | rjt_data.explan = ELS_EXPL_NONE; | |
1925 | goto reject; | |
1926 | } | |
42e9a92f | 1927 | |
3ac6f98f JE |
1928 | /* |
1929 | * Get session payload size from incoming PLOGI. | |
1930 | */ | |
1931 | rdata->maxframe_size = fc_plogi_get_maxframe(pl, lport->mfs); | |
3ac6f98f JE |
1932 | |
1933 | /* | |
1934 | * Send LS_ACC. If this fails, the originator should retry. | |
1935 | */ | |
3ac6f98f JE |
1936 | fp = fc_frame_alloc(lport, sizeof(*pl)); |
1937 | if (!fp) | |
1938 | goto out; | |
1939 | ||
1940 | fc_plogi_fill(lport, fp, ELS_LS_ACC); | |
24f089e2 JE |
1941 | fc_fill_reply_hdr(fp, rx_fp, FC_RCTL_ELS_REP, 0); |
1942 | lport->tt.frame_send(lport, fp); | |
3ac6f98f JE |
1943 | fc_rport_enter_prli(rdata); |
1944 | out: | |
1945 | mutex_unlock(&rdata->rp_mutex); | |
24f089e2 | 1946 | fc_frame_free(rx_fp); |
3ac6f98f JE |
1947 | return; |
1948 | ||
1949 | reject: | |
7ab24dd1 | 1950 | fc_seq_els_rsp_send(fp, ELS_LS_RJT, &rjt_data); |
3ac6f98f | 1951 | fc_frame_free(fp); |
42e9a92f RL |
1952 | } |
1953 | ||
1954 | /** | |
3a3b42bf RL |
1955 | * fc_rport_recv_prli_req() - Handler for process login (PRLI) requests |
1956 | * @rdata: The remote port that sent the PRLI request | |
3a3b42bf | 1957 | * @rx_fp: The PRLI request frame |
42e9a92f | 1958 | * |
c1d45424 | 1959 | * Locking Note: The rport lock is expected to be held before calling |
42e9a92f RL |
1960 | * this function. |
1961 | */ | |
9fb9d328 | 1962 | static void fc_rport_recv_prli_req(struct fc_rport_priv *rdata, |
92261156 | 1963 | struct fc_frame *rx_fp) |
42e9a92f | 1964 | { |
42e9a92f | 1965 | struct fc_lport *lport = rdata->local_port; |
42e9a92f | 1966 | struct fc_frame *fp; |
42e9a92f RL |
1967 | struct { |
1968 | struct fc_els_prli prli; | |
1969 | struct fc_els_spp spp; | |
1970 | } *pp; | |
1971 | struct fc_els_spp *rspp; /* request service param page */ | |
1972 | struct fc_els_spp *spp; /* response spp */ | |
1973 | unsigned int len; | |
1974 | unsigned int plen; | |
42e9a92f RL |
1975 | enum fc_els_spp_resp resp; |
1976 | struct fc_seq_els_data rjt_data; | |
96ad8464 | 1977 | struct fc4_prov *prov; |
42e9a92f | 1978 | |
9fb9d328 JE |
1979 | FC_RPORT_DBG(rdata, "Received PRLI request while in state %s\n", |
1980 | fc_rport_state(rdata)); | |
42e9a92f | 1981 | |
251748a9 | 1982 | len = fr_len(rx_fp) - sizeof(struct fc_frame_header); |
42e9a92f | 1983 | pp = fc_frame_payload_get(rx_fp, sizeof(*pp)); |
a2f6a024 JE |
1984 | if (!pp) |
1985 | goto reject_len; | |
1986 | plen = ntohs(pp->prli.prli_len); | |
1987 | if ((plen % 4) != 0 || plen > len || plen < 16) | |
1988 | goto reject_len; | |
1989 | if (plen < len) | |
1990 | len = plen; | |
1991 | plen = pp->prli.prli_spp_len; | |
1992 | if ((plen % 4) != 0 || plen < sizeof(*spp) || | |
1993 | plen > len || len < sizeof(*pp) || plen < 12) | |
1994 | goto reject_len; | |
1995 | rspp = &pp->spp; | |
1996 | ||
1997 | fp = fc_frame_alloc(lport, len); | |
1998 | if (!fp) { | |
1999 | rjt_data.reason = ELS_RJT_UNAB; | |
2000 | rjt_data.explan = ELS_EXPL_INSUF_RES; | |
2001 | goto reject; | |
42e9a92f | 2002 | } |
a2f6a024 JE |
2003 | pp = fc_frame_payload_get(fp, len); |
2004 | WARN_ON(!pp); | |
2005 | memset(pp, 0, len); | |
2006 | pp->prli.prli_cmd = ELS_LS_ACC; | |
2007 | pp->prli.prli_spp_len = plen; | |
2008 | pp->prli.prli_len = htons(len); | |
2009 | len -= sizeof(struct fc_els_prli); | |
42e9a92f | 2010 | |
a2f6a024 JE |
2011 | /* |
2012 | * Go through all the service parameter pages and build | |
2013 | * response. If plen indicates longer SPP than standard, | |
2014 | * use that. The entire response has been pre-cleared above. | |
2015 | */ | |
2016 | spp = &pp->spp; | |
96ad8464 | 2017 | mutex_lock(&fc_prov_mutex); |
a2f6a024 | 2018 | while (len >= plen) { |
75a2792d | 2019 | rdata->spp_type = rspp->spp_type; |
a2f6a024 JE |
2020 | spp->spp_type = rspp->spp_type; |
2021 | spp->spp_type_ext = rspp->spp_type_ext; | |
96ad8464 JE |
2022 | resp = 0; |
2023 | ||
2024 | if (rspp->spp_type < FC_FC4_PROV_SIZE) { | |
386b97b4 HR |
2025 | enum fc_els_spp_resp active = 0, passive = 0; |
2026 | ||
96ad8464 JE |
2027 | prov = fc_active_prov[rspp->spp_type]; |
2028 | if (prov) | |
386b97b4 | 2029 | active = prov->prli(rdata, plen, rspp, spp); |
96ad8464 | 2030 | prov = fc_passive_prov[rspp->spp_type]; |
386b97b4 | 2031 | if (prov) |
96ad8464 | 2032 | passive = prov->prli(rdata, plen, rspp, spp); |
386b97b4 HR |
2033 | if (!active || passive == FC_SPP_RESP_ACK) |
2034 | resp = passive; | |
2035 | else | |
2036 | resp = active; | |
2037 | FC_RPORT_DBG(rdata, "PRLI rspp type %x " | |
2038 | "active %x passive %x\n", | |
2039 | rspp->spp_type, active, passive); | |
96ad8464 JE |
2040 | } |
2041 | if (!resp) { | |
2042 | if (spp->spp_flags & FC_SPP_EST_IMG_PAIR) | |
2043 | resp |= FC_SPP_RESP_CONF; | |
2044 | else | |
2045 | resp |= FC_SPP_RESP_INVL; | |
42e9a92f | 2046 | } |
a2f6a024 JE |
2047 | spp->spp_flags |= resp; |
2048 | len -= plen; | |
2049 | rspp = (struct fc_els_spp *)((char *)rspp + plen); | |
2050 | spp = (struct fc_els_spp *)((char *)spp + plen); | |
2051 | } | |
96ad8464 | 2052 | mutex_unlock(&fc_prov_mutex); |
a2f6a024 JE |
2053 | |
2054 | /* | |
2055 | * Send LS_ACC. If this fails, the originator should retry. | |
2056 | */ | |
24f089e2 JE |
2057 | fc_fill_reply_hdr(fp, rx_fp, FC_RCTL_ELS_REP, 0); |
2058 | lport->tt.frame_send(lport, fp); | |
a2f6a024 | 2059 | |
a2f6a024 JE |
2060 | goto drop; |
2061 | ||
2062 | reject_len: | |
2063 | rjt_data.reason = ELS_RJT_PROT; | |
2064 | rjt_data.explan = ELS_EXPL_INV_LEN; | |
2065 | reject: | |
7ab24dd1 | 2066 | fc_seq_els_rsp_send(rx_fp, ELS_LS_RJT, &rjt_data); |
a2f6a024 | 2067 | drop: |
42e9a92f RL |
2068 | fc_frame_free(rx_fp); |
2069 | } | |
2070 | ||
2071 | /** | |
3a3b42bf RL |
2072 | * fc_rport_recv_prlo_req() - Handler for process logout (PRLO) requests |
2073 | * @rdata: The remote port that sent the PRLO request | |
f8fc6c2c | 2074 | * @rx_fp: The PRLO request frame |
42e9a92f | 2075 | * |
c1d45424 | 2076 | * Locking Note: The rport lock is expected to be held before calling |
42e9a92f RL |
2077 | * this function. |
2078 | */ | |
9fb9d328 | 2079 | static void fc_rport_recv_prlo_req(struct fc_rport_priv *rdata, |
f8fc6c2c | 2080 | struct fc_frame *rx_fp) |
42e9a92f | 2081 | { |
42e9a92f | 2082 | struct fc_lport *lport = rdata->local_port; |
f8fc6c2c BPG |
2083 | struct fc_frame *fp; |
2084 | struct { | |
2085 | struct fc_els_prlo prlo; | |
2086 | struct fc_els_spp spp; | |
2087 | } *pp; | |
2088 | struct fc_els_spp *rspp; /* request service param page */ | |
2089 | struct fc_els_spp *spp; /* response spp */ | |
2090 | unsigned int len; | |
2091 | unsigned int plen; | |
42e9a92f RL |
2092 | struct fc_seq_els_data rjt_data; |
2093 | ||
9fb9d328 JE |
2094 | FC_RPORT_DBG(rdata, "Received PRLO request while in state %s\n", |
2095 | fc_rport_state(rdata)); | |
42e9a92f | 2096 | |
251748a9 | 2097 | len = fr_len(rx_fp) - sizeof(struct fc_frame_header); |
f8fc6c2c BPG |
2098 | pp = fc_frame_payload_get(rx_fp, sizeof(*pp)); |
2099 | if (!pp) | |
2100 | goto reject_len; | |
2101 | plen = ntohs(pp->prlo.prlo_len); | |
2102 | if (plen != 20) | |
2103 | goto reject_len; | |
2104 | if (plen < len) | |
2105 | len = plen; | |
2106 | ||
2107 | rspp = &pp->spp; | |
2108 | ||
2109 | fp = fc_frame_alloc(lport, len); | |
2110 | if (!fp) { | |
2111 | rjt_data.reason = ELS_RJT_UNAB; | |
2112 | rjt_data.explan = ELS_EXPL_INSUF_RES; | |
2113 | goto reject; | |
2114 | } | |
2115 | ||
f8fc6c2c BPG |
2116 | pp = fc_frame_payload_get(fp, len); |
2117 | WARN_ON(!pp); | |
2118 | memset(pp, 0, len); | |
2119 | pp->prlo.prlo_cmd = ELS_LS_ACC; | |
2120 | pp->prlo.prlo_obs = 0x10; | |
2121 | pp->prlo.prlo_len = htons(len); | |
2122 | spp = &pp->spp; | |
2123 | spp->spp_type = rspp->spp_type; | |
2124 | spp->spp_type_ext = rspp->spp_type_ext; | |
2125 | spp->spp_flags = FC_SPP_RESP_ACK; | |
2126 | ||
166f310b | 2127 | fc_rport_enter_prli(rdata); |
f8fc6c2c | 2128 | |
92261156 JE |
2129 | fc_fill_reply_hdr(fp, rx_fp, FC_RCTL_ELS_REP, 0); |
2130 | lport->tt.frame_send(lport, fp); | |
f8fc6c2c BPG |
2131 | goto drop; |
2132 | ||
2133 | reject_len: | |
2134 | rjt_data.reason = ELS_RJT_PROT; | |
2135 | rjt_data.explan = ELS_EXPL_INV_LEN; | |
2136 | reject: | |
7ab24dd1 | 2137 | fc_seq_els_rsp_send(rx_fp, ELS_LS_RJT, &rjt_data); |
f8fc6c2c BPG |
2138 | drop: |
2139 | fc_frame_free(rx_fp); | |
42e9a92f RL |
2140 | } |
2141 | ||
2142 | /** | |
3a3b42bf RL |
2143 | * fc_rport_recv_logo_req() - Handler for logout (LOGO) requests |
2144 | * @lport: The local port that received the LOGO request | |
3a3b42bf | 2145 | * @fp: The LOGO request frame |
42e9a92f | 2146 | * |
c1d45424 | 2147 | * Locking Note: The rport lock is expected to be held before calling |
42e9a92f | 2148 | * this function. |
4d2095cc HR |
2149 | * |
2150 | * Reference counting: drops kref on return | |
42e9a92f | 2151 | */ |
92261156 | 2152 | static void fc_rport_recv_logo_req(struct fc_lport *lport, struct fc_frame *fp) |
42e9a92f | 2153 | { |
83fe6a93 JE |
2154 | struct fc_rport_priv *rdata; |
2155 | u32 sid; | |
42e9a92f | 2156 | |
7ab24dd1 | 2157 | fc_seq_els_rsp_send(fp, ELS_LS_ACC, NULL); |
feab4ae7 | 2158 | |
251748a9 | 2159 | sid = fc_frame_sid(fp); |
42e9a92f | 2160 | |
e87b7777 | 2161 | rdata = fc_rport_lookup(lport, sid); |
83fe6a93 JE |
2162 | if (rdata) { |
2163 | mutex_lock(&rdata->rp_mutex); | |
2164 | FC_RPORT_DBG(rdata, "Received LOGO request while in state %s\n", | |
2165 | fc_rport_state(rdata)); | |
feab4ae7 | 2166 | |
649eb869 | 2167 | fc_rport_enter_delete(rdata, RPORT_EV_STOP); |
83fe6a93 | 2168 | mutex_unlock(&rdata->rp_mutex); |
944ef968 | 2169 | kref_put(&rdata->kref, fc_rport_destroy); |
83fe6a93 JE |
2170 | } else |
2171 | FC_RPORT_ID_DBG(lport, sid, | |
2172 | "Received LOGO from non-logged-in port\n"); | |
42e9a92f RL |
2173 | fc_frame_free(fp); |
2174 | } | |
2175 | ||
3a3b42bf RL |
2176 | /** |
2177 | * fc_rport_flush_queue() - Flush the rport_event_queue | |
2178 | */ | |
5922a957 | 2179 | void fc_rport_flush_queue(void) |
42e9a92f RL |
2180 | { |
2181 | flush_workqueue(rport_event_queue); | |
2182 | } | |
5922a957 | 2183 | EXPORT_SYMBOL(fc_rport_flush_queue); |
42e9a92f | 2184 | |
96ad8464 JE |
2185 | /** |
2186 | * fc_rport_fcp_prli() - Handle incoming PRLI for the FCP initiator. | |
2187 | * @rdata: remote port private | |
2188 | * @spp_len: service parameter page length | |
2189 | * @rspp: received service parameter page | |
2190 | * @spp: response service parameter page | |
2191 | * | |
2192 | * Returns the value for the response code to be placed in spp_flags; | |
2193 | * Returns 0 if not an initiator. | |
2194 | */ | |
2195 | static int fc_rport_fcp_prli(struct fc_rport_priv *rdata, u32 spp_len, | |
2196 | const struct fc_els_spp *rspp, | |
2197 | struct fc_els_spp *spp) | |
2198 | { | |
2199 | struct fc_lport *lport = rdata->local_port; | |
2200 | u32 fcp_parm; | |
2201 | ||
2202 | fcp_parm = ntohl(rspp->spp_params); | |
2203 | rdata->ids.roles = FC_RPORT_ROLE_UNKNOWN; | |
2204 | if (fcp_parm & FCP_SPPF_INIT_FCN) | |
2205 | rdata->ids.roles |= FC_RPORT_ROLE_FCP_INITIATOR; | |
2206 | if (fcp_parm & FCP_SPPF_TARG_FCN) | |
2207 | rdata->ids.roles |= FC_RPORT_ROLE_FCP_TARGET; | |
2208 | if (fcp_parm & FCP_SPPF_RETRY) | |
2209 | rdata->flags |= FC_RP_FLAGS_RETRY; | |
2210 | rdata->supported_classes = FC_COS_CLASS3; | |
2211 | ||
732bdb9d | 2212 | if (!(lport->service_params & FCP_SPPF_INIT_FCN)) |
96ad8464 JE |
2213 | return 0; |
2214 | ||
2215 | spp->spp_flags |= rspp->spp_flags & FC_SPP_EST_IMG_PAIR; | |
2216 | ||
2217 | /* | |
2218 | * OR in our service parameters with other providers (target), if any. | |
2219 | */ | |
2220 | fcp_parm = ntohl(spp->spp_params); | |
2221 | spp->spp_params = htonl(fcp_parm | lport->service_params); | |
2222 | return FC_SPP_RESP_ACK; | |
2223 | } | |
2224 | ||
2225 | /* | |
2226 | * FC-4 provider ops for FCP initiator. | |
2227 | */ | |
2228 | struct fc4_prov fc_rport_fcp_init = { | |
2229 | .prli = fc_rport_fcp_prli, | |
2230 | }; | |
2231 | ||
2232 | /** | |
2233 | * fc_rport_t0_prli() - Handle incoming PRLI parameters for type 0 | |
2234 | * @rdata: remote port private | |
2235 | * @spp_len: service parameter page length | |
2236 | * @rspp: received service parameter page | |
2237 | * @spp: response service parameter page | |
2238 | */ | |
2239 | static int fc_rport_t0_prli(struct fc_rport_priv *rdata, u32 spp_len, | |
2240 | const struct fc_els_spp *rspp, | |
2241 | struct fc_els_spp *spp) | |
2242 | { | |
2243 | if (rspp->spp_flags & FC_SPP_EST_IMG_PAIR) | |
2244 | return FC_SPP_RESP_INVL; | |
2245 | return FC_SPP_RESP_ACK; | |
2246 | } | |
2247 | ||
2248 | /* | |
2249 | * FC-4 provider ops for type 0 service parameters. | |
2250 | * | |
2251 | * This handles the special case of type 0 which is always successful | |
2252 | * but doesn't do anything otherwise. | |
2253 | */ | |
2254 | struct fc4_prov fc_rport_t0_prov = { | |
2255 | .prli = fc_rport_t0_prli, | |
2256 | }; | |
2257 | ||
3a3b42bf RL |
2258 | /** |
2259 | * fc_setup_rport() - Initialize the rport_event_queue | |
2260 | */ | |
55204909 | 2261 | int fc_setup_rport(void) |
42e9a92f RL |
2262 | { |
2263 | rport_event_queue = create_singlethread_workqueue("fc_rport_eq"); | |
2264 | if (!rport_event_queue) | |
2265 | return -ENOMEM; | |
2266 | return 0; | |
2267 | } | |
42e9a92f | 2268 | |
3a3b42bf RL |
2269 | /** |
2270 | * fc_destroy_rport() - Destroy the rport_event_queue | |
2271 | */ | |
55204909 | 2272 | void fc_destroy_rport(void) |
42e9a92f RL |
2273 | { |
2274 | destroy_workqueue(rport_event_queue); | |
2275 | } | |
42e9a92f | 2276 | |
3a3b42bf RL |
2277 | /** |
2278 | * fc_rport_terminate_io() - Stop all outstanding I/O on a remote port | |
2279 | * @rport: The remote port whose I/O should be terminated | |
2280 | */ | |
42e9a92f RL |
2281 | void fc_rport_terminate_io(struct fc_rport *rport) |
2282 | { | |
3a3b42bf RL |
2283 | struct fc_rport_libfc_priv *rpriv = rport->dd_data; |
2284 | struct fc_lport *lport = rpriv->local_port; | |
42e9a92f | 2285 | |
1f6ff364 AJ |
2286 | lport->tt.exch_mgr_reset(lport, 0, rport->port_id); |
2287 | lport->tt.exch_mgr_reset(lport, rport->port_id, 0); | |
42e9a92f RL |
2288 | } |
2289 | EXPORT_SYMBOL(fc_rport_terminate_io); |