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Commit | Line | Data |
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42e9a92f RL |
1 | /* |
2 | * Copyright(c) 2007 - 2008 Intel Corporation. All rights reserved. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms and conditions of the GNU General Public License, | |
6 | * version 2, as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope it will be useful, but WITHOUT | |
9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
11 | * more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License along with | |
14 | * this program; if not, write to the Free Software Foundation, Inc., | |
15 | * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. | |
16 | * | |
17 | * Maintained at www.Open-FCoE.org | |
18 | */ | |
19 | ||
20 | /* | |
21 | * RPORT GENERAL INFO | |
22 | * | |
23 | * This file contains all processing regarding fc_rports. It contains the | |
24 | * rport state machine and does all rport interaction with the transport class. | |
25 | * There should be no other places in libfc that interact directly with the | |
26 | * transport class in regards to adding and deleting rports. | |
27 | * | |
28 | * fc_rport's represent N_Port's within the fabric. | |
29 | */ | |
30 | ||
31 | /* | |
32 | * RPORT LOCKING | |
33 | * | |
34 | * The rport should never hold the rport mutex and then attempt to acquire | |
35 | * either the lport or disc mutexes. The rport's mutex is considered lesser | |
36 | * than both the lport's mutex and the disc mutex. Refer to fc_lport.c for | |
732bee7a | 37 | * more comments on the hierarchy. |
42e9a92f RL |
38 | * |
39 | * The locking strategy is similar to the lport's strategy. The lock protects | |
40 | * the rport's states and is held and released by the entry points to the rport | |
41 | * block. All _enter_* functions correspond to rport states and expect the rport | |
42 | * mutex to be locked before calling them. This means that rports only handle | |
43 | * one request or response at a time, since they're not critical for the I/O | |
44 | * path this potential over-use of the mutex is acceptable. | |
45 | */ | |
46 | ||
47 | #include <linux/kernel.h> | |
48 | #include <linux/spinlock.h> | |
49 | #include <linux/interrupt.h> | |
5a0e3ad6 | 50 | #include <linux/slab.h> |
42e9a92f RL |
51 | #include <linux/rcupdate.h> |
52 | #include <linux/timer.h> | |
53 | #include <linux/workqueue.h> | |
09703660 | 54 | #include <linux/export.h> |
42e9a92f RL |
55 | #include <asm/unaligned.h> |
56 | ||
57 | #include <scsi/libfc.h> | |
58 | #include <scsi/fc_encode.h> | |
59 | ||
8866a5d9 RL |
60 | #include "fc_libfc.h" |
61 | ||
55204909 | 62 | static struct workqueue_struct *rport_event_queue; |
42e9a92f | 63 | |
a7b12a27 | 64 | static void fc_rport_enter_flogi(struct fc_rport_priv *); |
9fb9d328 JE |
65 | static void fc_rport_enter_plogi(struct fc_rport_priv *); |
66 | static void fc_rport_enter_prli(struct fc_rport_priv *); | |
67 | static void fc_rport_enter_rtv(struct fc_rport_priv *); | |
68 | static void fc_rport_enter_ready(struct fc_rport_priv *); | |
69 | static void fc_rport_enter_logo(struct fc_rport_priv *); | |
370c3bd0 | 70 | static void fc_rport_enter_adisc(struct fc_rport_priv *); |
42e9a92f | 71 | |
92261156 JE |
72 | static void fc_rport_recv_plogi_req(struct fc_lport *, struct fc_frame *); |
73 | static void fc_rport_recv_prli_req(struct fc_rport_priv *, struct fc_frame *); | |
74 | static void fc_rport_recv_prlo_req(struct fc_rport_priv *, struct fc_frame *); | |
75 | static void fc_rport_recv_logo_req(struct fc_lport *, struct fc_frame *); | |
42e9a92f | 76 | static void fc_rport_timeout(struct work_struct *); |
9fb9d328 JE |
77 | static void fc_rport_error(struct fc_rport_priv *, struct fc_frame *); |
78 | static void fc_rport_error_retry(struct fc_rport_priv *, struct fc_frame *); | |
42e9a92f RL |
79 | static void fc_rport_work(struct work_struct *); |
80 | ||
81 | static const char *fc_rport_state_names[] = { | |
42e9a92f | 82 | [RPORT_ST_INIT] = "Init", |
a7b12a27 JE |
83 | [RPORT_ST_FLOGI] = "FLOGI", |
84 | [RPORT_ST_PLOGI_WAIT] = "PLOGI_WAIT", | |
42e9a92f RL |
85 | [RPORT_ST_PLOGI] = "PLOGI", |
86 | [RPORT_ST_PRLI] = "PRLI", | |
87 | [RPORT_ST_RTV] = "RTV", | |
88 | [RPORT_ST_READY] = "Ready", | |
370c3bd0 | 89 | [RPORT_ST_ADISC] = "ADISC", |
14194054 | 90 | [RPORT_ST_DELETE] = "Delete", |
42e9a92f RL |
91 | }; |
92 | ||
8025b5db | 93 | /** |
3a3b42bf RL |
94 | * fc_rport_lookup() - Lookup a remote port by port_id |
95 | * @lport: The local port to lookup the remote port on | |
96 | * @port_id: The remote port ID to look up | |
42e90414 | 97 | * |
baa6719f HR |
98 | * The reference count of the fc_rport_priv structure is |
99 | * increased by one. | |
8025b5db JE |
100 | */ |
101 | static struct fc_rport_priv *fc_rport_lookup(const struct fc_lport *lport, | |
102 | u32 port_id) | |
103 | { | |
baa6719f | 104 | struct fc_rport_priv *rdata = NULL, *tmp_rdata; |
8025b5db | 105 | |
baa6719f HR |
106 | rcu_read_lock(); |
107 | list_for_each_entry_rcu(tmp_rdata, &lport->disc.rports, peers) | |
108 | if (tmp_rdata->ids.port_id == port_id && | |
109 | kref_get_unless_zero(&tmp_rdata->kref)) { | |
110 | rdata = tmp_rdata; | |
111 | break; | |
112 | } | |
113 | rcu_read_unlock(); | |
114 | return rdata; | |
8025b5db JE |
115 | } |
116 | ||
9e9d0452 | 117 | /** |
9737e6a7 | 118 | * fc_rport_create() - Create a new remote port |
3a3b42bf RL |
119 | * @lport: The local port this remote port will be associated with |
120 | * @ids: The identifiers for the new remote port | |
121 | * | |
122 | * The remote port will start in the INIT state. | |
9e9d0452 | 123 | * |
48f00902 | 124 | * Locking note: must be called with the disc_mutex held. |
9e9d0452 JE |
125 | */ |
126 | static struct fc_rport_priv *fc_rport_create(struct fc_lport *lport, | |
9737e6a7 | 127 | u32 port_id) |
42e9a92f | 128 | { |
ab28f1fd | 129 | struct fc_rport_priv *rdata; |
42e9a92f | 130 | |
9737e6a7 | 131 | rdata = lport->tt.rport_lookup(lport, port_id); |
19f97e3c JE |
132 | if (rdata) |
133 | return rdata; | |
134 | ||
f90377ab | 135 | rdata = kzalloc(sizeof(*rdata) + lport->rport_priv_size, GFP_KERNEL); |
9e9d0452 | 136 | if (!rdata) |
42e9a92f RL |
137 | return NULL; |
138 | ||
9737e6a7 RL |
139 | rdata->ids.node_name = -1; |
140 | rdata->ids.port_name = -1; | |
141 | rdata->ids.port_id = port_id; | |
142 | rdata->ids.roles = FC_RPORT_ROLE_UNKNOWN; | |
143 | ||
f211fa51 | 144 | kref_init(&rdata->kref); |
42e9a92f | 145 | mutex_init(&rdata->rp_mutex); |
795d86f5 | 146 | rdata->local_port = lport; |
42e9a92f RL |
147 | rdata->rp_state = RPORT_ST_INIT; |
148 | rdata->event = RPORT_EV_NONE; | |
149 | rdata->flags = FC_RP_FLAGS_REC_SUPPORTED; | |
795d86f5 JE |
150 | rdata->e_d_tov = lport->e_d_tov; |
151 | rdata->r_a_tov = lport->r_a_tov; | |
f211fa51 | 152 | rdata->maxframe_size = FC_MIN_MAX_PAYLOAD; |
42e9a92f RL |
153 | INIT_DELAYED_WORK(&rdata->retry_work, fc_rport_timeout); |
154 | INIT_WORK(&rdata->event_work, fc_rport_work); | |
75a2792d BPG |
155 | if (port_id != FC_FID_DIR_SERV) { |
156 | rdata->lld_event_callback = lport->tt.rport_event_callback; | |
42e90414 | 157 | list_add_rcu(&rdata->peers, &lport->disc.rports); |
75a2792d | 158 | } |
9fb9d328 | 159 | return rdata; |
42e9a92f RL |
160 | } |
161 | ||
f211fa51 | 162 | /** |
3a3b42bf RL |
163 | * fc_rport_destroy() - Free a remote port after last reference is released |
164 | * @kref: The remote port's kref | |
f211fa51 JE |
165 | */ |
166 | static void fc_rport_destroy(struct kref *kref) | |
167 | { | |
168 | struct fc_rport_priv *rdata; | |
f211fa51 JE |
169 | |
170 | rdata = container_of(kref, struct fc_rport_priv, kref); | |
8497a24a | 171 | kfree_rcu(rdata, rcu); |
f211fa51 JE |
172 | } |
173 | ||
42e9a92f | 174 | /** |
3a3b42bf RL |
175 | * fc_rport_state() - Return a string identifying the remote port's state |
176 | * @rdata: The remote port | |
42e9a92f | 177 | */ |
9fb9d328 | 178 | static const char *fc_rport_state(struct fc_rport_priv *rdata) |
42e9a92f RL |
179 | { |
180 | const char *cp; | |
42e9a92f RL |
181 | |
182 | cp = fc_rport_state_names[rdata->rp_state]; | |
183 | if (!cp) | |
184 | cp = "Unknown"; | |
185 | return cp; | |
186 | } | |
187 | ||
188 | /** | |
3a3b42bf RL |
189 | * fc_set_rport_loss_tmo() - Set the remote port loss timeout |
190 | * @rport: The remote port that gets a new timeout value | |
191 | * @timeout: The new timeout value (in seconds) | |
42e9a92f RL |
192 | */ |
193 | void fc_set_rport_loss_tmo(struct fc_rport *rport, u32 timeout) | |
194 | { | |
195 | if (timeout) | |
73b43764 | 196 | rport->dev_loss_tmo = timeout; |
42e9a92f | 197 | else |
73b43764 | 198 | rport->dev_loss_tmo = 1; |
42e9a92f RL |
199 | } |
200 | EXPORT_SYMBOL(fc_set_rport_loss_tmo); | |
201 | ||
202 | /** | |
3a3b42bf RL |
203 | * fc_plogi_get_maxframe() - Get the maximum payload from the common service |
204 | * parameters in a FLOGI frame | |
a7b12a27 | 205 | * @flp: The FLOGI or PLOGI payload |
3a3b42bf RL |
206 | * @maxval: The maximum frame size upper limit; this may be less than what |
207 | * is in the service parameters | |
42e9a92f | 208 | */ |
b2ab99c9 RL |
209 | static unsigned int fc_plogi_get_maxframe(struct fc_els_flogi *flp, |
210 | unsigned int maxval) | |
42e9a92f RL |
211 | { |
212 | unsigned int mfs; | |
213 | ||
214 | /* | |
215 | * Get max payload from the common service parameters and the | |
216 | * class 3 receive data field size. | |
217 | */ | |
218 | mfs = ntohs(flp->fl_csp.sp_bb_data) & FC_SP_BB_DATA_MASK; | |
219 | if (mfs >= FC_SP_MIN_MAX_PAYLOAD && mfs < maxval) | |
220 | maxval = mfs; | |
221 | mfs = ntohs(flp->fl_cssp[3 - 1].cp_rdfs); | |
222 | if (mfs >= FC_SP_MIN_MAX_PAYLOAD && mfs < maxval) | |
223 | maxval = mfs; | |
224 | return maxval; | |
225 | } | |
226 | ||
227 | /** | |
3a3b42bf RL |
228 | * fc_rport_state_enter() - Change the state of a remote port |
229 | * @rdata: The remote port whose state should change | |
230 | * @new: The new state | |
42e9a92f RL |
231 | * |
232 | * Locking Note: Called with the rport lock held | |
233 | */ | |
9fb9d328 | 234 | static void fc_rport_state_enter(struct fc_rport_priv *rdata, |
42e9a92f RL |
235 | enum fc_rport_state new) |
236 | { | |
42e9a92f RL |
237 | if (rdata->rp_state != new) |
238 | rdata->retries = 0; | |
239 | rdata->rp_state = new; | |
240 | } | |
241 | ||
3a3b42bf RL |
242 | /** |
243 | * fc_rport_work() - Handler for remote port events in the rport_event_queue | |
244 | * @work: Handle to the remote port being dequeued | |
245 | */ | |
42e9a92f RL |
246 | static void fc_rport_work(struct work_struct *work) |
247 | { | |
571f824c | 248 | u32 port_id; |
ab28f1fd JE |
249 | struct fc_rport_priv *rdata = |
250 | container_of(work, struct fc_rport_priv, event_work); | |
3a3b42bf | 251 | struct fc_rport_libfc_priv *rpriv; |
42e9a92f | 252 | enum fc_rport_event event; |
42e9a92f RL |
253 | struct fc_lport *lport = rdata->local_port; |
254 | struct fc_rport_operations *rport_ops; | |
629f4427 | 255 | struct fc_rport_identifiers ids; |
f211fa51 | 256 | struct fc_rport *rport; |
96ad8464 JE |
257 | struct fc4_prov *prov; |
258 | u8 type; | |
42e9a92f RL |
259 | |
260 | mutex_lock(&rdata->rp_mutex); | |
261 | event = rdata->event; | |
262 | rport_ops = rdata->ops; | |
f211fa51 | 263 | rport = rdata->rport; |
42e9a92f | 264 | |
9e9d0452 JE |
265 | FC_RPORT_DBG(rdata, "work event %u\n", event); |
266 | ||
629f4427 | 267 | switch (event) { |
4c0f62b5 | 268 | case RPORT_EV_READY: |
f211fa51 | 269 | ids = rdata->ids; |
5f7ea3b7 | 270 | rdata->event = RPORT_EV_NONE; |
f034260d | 271 | rdata->major_retries = 0; |
9e9d0452 | 272 | kref_get(&rdata->kref); |
42e9a92f RL |
273 | mutex_unlock(&rdata->rp_mutex); |
274 | ||
9e9d0452 JE |
275 | if (!rport) |
276 | rport = fc_remote_port_add(lport->host, 0, &ids); | |
277 | if (!rport) { | |
278 | FC_RPORT_DBG(rdata, "Failed to add the rport\n"); | |
279 | lport->tt.rport_logoff(rdata); | |
280 | kref_put(&rdata->kref, lport->tt.rport_destroy); | |
281 | return; | |
42e9a92f | 282 | } |
9e9d0452 JE |
283 | mutex_lock(&rdata->rp_mutex); |
284 | if (rdata->rport) | |
285 | FC_RPORT_DBG(rdata, "rport already allocated\n"); | |
286 | rdata->rport = rport; | |
287 | rport->maxframe_size = rdata->maxframe_size; | |
288 | rport->supported_classes = rdata->supported_classes; | |
289 | ||
3a3b42bf RL |
290 | rpriv = rport->dd_data; |
291 | rpriv->local_port = lport; | |
292 | rpriv->rp_state = rdata->rp_state; | |
293 | rpriv->flags = rdata->flags; | |
294 | rpriv->e_d_tov = rdata->e_d_tov; | |
295 | rpriv->r_a_tov = rdata->r_a_tov; | |
9e9d0452 JE |
296 | mutex_unlock(&rdata->rp_mutex); |
297 | ||
8345592b | 298 | if (rport_ops && rport_ops->event_callback) { |
9e9d0452 | 299 | FC_RPORT_DBG(rdata, "callback ev %d\n", event); |
9fb9d328 | 300 | rport_ops->event_callback(lport, rdata, event); |
9e9d0452 | 301 | } |
75a2792d BPG |
302 | if (rdata->lld_event_callback) { |
303 | FC_RPORT_DBG(rdata, "lld callback ev %d\n", event); | |
304 | rdata->lld_event_callback(lport, rdata, event); | |
305 | } | |
9e9d0452 | 306 | kref_put(&rdata->kref, lport->tt.rport_destroy); |
629f4427 JE |
307 | break; |
308 | ||
309 | case RPORT_EV_FAILED: | |
310 | case RPORT_EV_LOGO: | |
311 | case RPORT_EV_STOP: | |
96ad8464 JE |
312 | if (rdata->prli_count) { |
313 | mutex_lock(&fc_prov_mutex); | |
314 | for (type = 1; type < FC_FC4_PROV_SIZE; type++) { | |
315 | prov = fc_passive_prov[type]; | |
316 | if (prov && prov->prlo) | |
317 | prov->prlo(rdata); | |
318 | } | |
319 | mutex_unlock(&fc_prov_mutex); | |
320 | } | |
9e9d0452 | 321 | port_id = rdata->ids.port_id; |
42e9a92f | 322 | mutex_unlock(&rdata->rp_mutex); |
9e9d0452 | 323 | |
8345592b | 324 | if (rport_ops && rport_ops->event_callback) { |
9e9d0452 | 325 | FC_RPORT_DBG(rdata, "callback ev %d\n", event); |
9fb9d328 | 326 | rport_ops->event_callback(lport, rdata, event); |
9e9d0452 | 327 | } |
75a2792d BPG |
328 | if (rdata->lld_event_callback) { |
329 | FC_RPORT_DBG(rdata, "lld callback ev %d\n", event); | |
330 | rdata->lld_event_callback(lport, rdata, event); | |
331 | } | |
201e5795 | 332 | cancel_delayed_work_sync(&rdata->retry_work); |
9e9d0452 JE |
333 | |
334 | /* | |
335 | * Reset any outstanding exchanges before freeing rport. | |
336 | */ | |
337 | lport->tt.exch_mgr_reset(lport, 0, port_id); | |
338 | lport->tt.exch_mgr_reset(lport, port_id, 0); | |
339 | ||
340 | if (rport) { | |
3a3b42bf RL |
341 | rpriv = rport->dd_data; |
342 | rpriv->rp_state = RPORT_ST_DELETE; | |
9e9d0452 JE |
343 | mutex_lock(&rdata->rp_mutex); |
344 | rdata->rport = NULL; | |
345 | mutex_unlock(&rdata->rp_mutex); | |
42e9a92f | 346 | fc_remote_port_delete(rport); |
571f824c | 347 | } |
4b2164d4 | 348 | |
4b2164d4 JE |
349 | mutex_lock(&rdata->rp_mutex); |
350 | if (rdata->rp_state == RPORT_ST_DELETE) { | |
351 | if (port_id == FC_FID_DIR_SERV) { | |
352 | rdata->event = RPORT_EV_NONE; | |
353 | mutex_unlock(&rdata->rp_mutex); | |
fe5e3f1a | 354 | kref_put(&rdata->kref, lport->tt.rport_destroy); |
f034260d JE |
355 | } else if ((rdata->flags & FC_RP_STARTED) && |
356 | rdata->major_retries < | |
357 | lport->max_rport_retry_count) { | |
358 | rdata->major_retries++; | |
4b2164d4 JE |
359 | rdata->event = RPORT_EV_NONE; |
360 | FC_RPORT_DBG(rdata, "work restart\n"); | |
a7b12a27 | 361 | fc_rport_enter_flogi(rdata); |
4b2164d4 JE |
362 | mutex_unlock(&rdata->rp_mutex); |
363 | } else { | |
364 | FC_RPORT_DBG(rdata, "work delete\n"); | |
42e90414 | 365 | list_del_rcu(&rdata->peers); |
4b2164d4 JE |
366 | mutex_unlock(&rdata->rp_mutex); |
367 | kref_put(&rdata->kref, lport->tt.rport_destroy); | |
368 | } | |
369 | } else { | |
370 | /* | |
371 | * Re-open for events. Reissue READY event if ready. | |
372 | */ | |
373 | rdata->event = RPORT_EV_NONE; | |
374 | if (rdata->rp_state == RPORT_ST_READY) | |
375 | fc_rport_enter_ready(rdata); | |
b4a9c7ed | 376 | mutex_unlock(&rdata->rp_mutex); |
4b2164d4 | 377 | } |
629f4427 JE |
378 | break; |
379 | ||
380 | default: | |
42e9a92f | 381 | mutex_unlock(&rdata->rp_mutex); |
629f4427 JE |
382 | break; |
383 | } | |
42e9a92f RL |
384 | } |
385 | ||
386 | /** | |
34f42a07 | 387 | * fc_rport_login() - Start the remote port login state machine |
3a3b42bf | 388 | * @rdata: The remote port to be logged in to |
42e9a92f RL |
389 | * |
390 | * Locking Note: Called without the rport lock held. This | |
391 | * function will hold the rport lock, call an _enter_* | |
392 | * function and then unlock the rport. | |
370c3bd0 JE |
393 | * |
394 | * This indicates the intent to be logged into the remote port. | |
395 | * If it appears we are already logged in, ADISC is used to verify | |
396 | * the setup. | |
42e9a92f | 397 | */ |
c6b21c93 | 398 | static int fc_rport_login(struct fc_rport_priv *rdata) |
42e9a92f | 399 | { |
42e9a92f RL |
400 | mutex_lock(&rdata->rp_mutex); |
401 | ||
4b2164d4 | 402 | rdata->flags |= FC_RP_STARTED; |
370c3bd0 JE |
403 | switch (rdata->rp_state) { |
404 | case RPORT_ST_READY: | |
405 | FC_RPORT_DBG(rdata, "ADISC port\n"); | |
406 | fc_rport_enter_adisc(rdata); | |
407 | break; | |
b4a9c7ed JE |
408 | case RPORT_ST_DELETE: |
409 | FC_RPORT_DBG(rdata, "Restart deleted port\n"); | |
b4a9c7ed | 410 | break; |
370c3bd0 JE |
411 | default: |
412 | FC_RPORT_DBG(rdata, "Login to port\n"); | |
a7b12a27 | 413 | fc_rport_enter_flogi(rdata); |
370c3bd0 JE |
414 | break; |
415 | } | |
42e9a92f RL |
416 | mutex_unlock(&rdata->rp_mutex); |
417 | ||
418 | return 0; | |
419 | } | |
420 | ||
5f7ea3b7 | 421 | /** |
3a3b42bf RL |
422 | * fc_rport_enter_delete() - Schedule a remote port to be deleted |
423 | * @rdata: The remote port to be deleted | |
424 | * @event: The event to report as the reason for deletion | |
5f7ea3b7 JE |
425 | * |
426 | * Locking Note: Called with the rport lock held. | |
427 | * | |
428 | * Allow state change into DELETE only once. | |
429 | * | |
430 | * Call queue_work only if there's no event already pending. | |
431 | * Set the new event so that the old pending event will not occur. | |
432 | * Since we have the mutex, even if fc_rport_work() is already started, | |
433 | * it'll see the new event. | |
434 | */ | |
9fb9d328 | 435 | static void fc_rport_enter_delete(struct fc_rport_priv *rdata, |
5f7ea3b7 JE |
436 | enum fc_rport_event event) |
437 | { | |
5f7ea3b7 JE |
438 | if (rdata->rp_state == RPORT_ST_DELETE) |
439 | return; | |
440 | ||
9fb9d328 | 441 | FC_RPORT_DBG(rdata, "Delete port\n"); |
5f7ea3b7 | 442 | |
9fb9d328 | 443 | fc_rport_state_enter(rdata, RPORT_ST_DELETE); |
5f7ea3b7 JE |
444 | |
445 | if (rdata->event == RPORT_EV_NONE) | |
446 | queue_work(rport_event_queue, &rdata->event_work); | |
447 | rdata->event = event; | |
448 | } | |
449 | ||
42e9a92f | 450 | /** |
3a3b42bf RL |
451 | * fc_rport_logoff() - Logoff and remove a remote port |
452 | * @rdata: The remote port to be logged off of | |
42e9a92f RL |
453 | * |
454 | * Locking Note: Called without the rport lock held. This | |
455 | * function will hold the rport lock, call an _enter_* | |
456 | * function and then unlock the rport. | |
457 | */ | |
c6b21c93 | 458 | static int fc_rport_logoff(struct fc_rport_priv *rdata) |
42e9a92f | 459 | { |
42e9a92f RL |
460 | mutex_lock(&rdata->rp_mutex); |
461 | ||
9fb9d328 | 462 | FC_RPORT_DBG(rdata, "Remove port\n"); |
42e9a92f | 463 | |
4b2164d4 | 464 | rdata->flags &= ~FC_RP_STARTED; |
14194054 | 465 | if (rdata->rp_state == RPORT_ST_DELETE) { |
9fb9d328 | 466 | FC_RPORT_DBG(rdata, "Port in Delete state, not removing\n"); |
b4c6f546 AJ |
467 | goto out; |
468 | } | |
4b2164d4 | 469 | fc_rport_enter_logo(rdata); |
42e9a92f RL |
470 | |
471 | /* | |
14194054 | 472 | * Change the state to Delete so that we discard |
42e9a92f RL |
473 | * the response. |
474 | */ | |
9fb9d328 | 475 | fc_rport_enter_delete(rdata, RPORT_EV_STOP); |
b4c6f546 | 476 | out: |
b4a9c7ed | 477 | mutex_unlock(&rdata->rp_mutex); |
42e9a92f RL |
478 | return 0; |
479 | } | |
480 | ||
481 | /** | |
3a3b42bf RL |
482 | * fc_rport_enter_ready() - Transition to the RPORT_ST_READY state |
483 | * @rdata: The remote port that is ready | |
42e9a92f RL |
484 | * |
485 | * Locking Note: The rport lock is expected to be held before calling | |
486 | * this routine. | |
487 | */ | |
9fb9d328 | 488 | static void fc_rport_enter_ready(struct fc_rport_priv *rdata) |
42e9a92f | 489 | { |
9fb9d328 | 490 | fc_rport_state_enter(rdata, RPORT_ST_READY); |
42e9a92f | 491 | |
9fb9d328 | 492 | FC_RPORT_DBG(rdata, "Port is Ready\n"); |
42e9a92f | 493 | |
5f7ea3b7 JE |
494 | if (rdata->event == RPORT_EV_NONE) |
495 | queue_work(rport_event_queue, &rdata->event_work); | |
4c0f62b5 | 496 | rdata->event = RPORT_EV_READY; |
42e9a92f RL |
497 | } |
498 | ||
499 | /** | |
3a3b42bf RL |
500 | * fc_rport_timeout() - Handler for the retry_work timer |
501 | * @work: Handle to the remote port that has timed out | |
42e9a92f RL |
502 | * |
503 | * Locking Note: Called without the rport lock held. This | |
504 | * function will hold the rport lock, call an _enter_* | |
505 | * function and then unlock the rport. | |
506 | */ | |
507 | static void fc_rport_timeout(struct work_struct *work) | |
508 | { | |
ab28f1fd JE |
509 | struct fc_rport_priv *rdata = |
510 | container_of(work, struct fc_rport_priv, retry_work.work); | |
42e9a92f RL |
511 | |
512 | mutex_lock(&rdata->rp_mutex); | |
513 | ||
514 | switch (rdata->rp_state) { | |
a7b12a27 JE |
515 | case RPORT_ST_FLOGI: |
516 | fc_rport_enter_flogi(rdata); | |
517 | break; | |
42e9a92f | 518 | case RPORT_ST_PLOGI: |
9fb9d328 | 519 | fc_rport_enter_plogi(rdata); |
42e9a92f RL |
520 | break; |
521 | case RPORT_ST_PRLI: | |
9fb9d328 | 522 | fc_rport_enter_prli(rdata); |
42e9a92f RL |
523 | break; |
524 | case RPORT_ST_RTV: | |
9fb9d328 | 525 | fc_rport_enter_rtv(rdata); |
42e9a92f | 526 | break; |
370c3bd0 JE |
527 | case RPORT_ST_ADISC: |
528 | fc_rport_enter_adisc(rdata); | |
529 | break; | |
a7b12a27 | 530 | case RPORT_ST_PLOGI_WAIT: |
42e9a92f RL |
531 | case RPORT_ST_READY: |
532 | case RPORT_ST_INIT: | |
14194054 | 533 | case RPORT_ST_DELETE: |
42e9a92f RL |
534 | break; |
535 | } | |
536 | ||
537 | mutex_unlock(&rdata->rp_mutex); | |
42e9a92f RL |
538 | } |
539 | ||
540 | /** | |
34f42a07 | 541 | * fc_rport_error() - Error handler, called once retries have been exhausted |
3a3b42bf RL |
542 | * @rdata: The remote port the error is happened on |
543 | * @fp: The error code encapsulated in a frame pointer | |
42e9a92f | 544 | * |
42e9a92f RL |
545 | * Locking Note: The rport lock is expected to be held before |
546 | * calling this routine | |
547 | */ | |
9fb9d328 | 548 | static void fc_rport_error(struct fc_rport_priv *rdata, struct fc_frame *fp) |
42e9a92f | 549 | { |
9fb9d328 | 550 | FC_RPORT_DBG(rdata, "Error %ld in state %s, retries %d\n", |
cdbe6dfe JE |
551 | IS_ERR(fp) ? -PTR_ERR(fp) : 0, |
552 | fc_rport_state(rdata), rdata->retries); | |
42e9a92f | 553 | |
6755db1c | 554 | switch (rdata->rp_state) { |
a7b12a27 | 555 | case RPORT_ST_FLOGI: |
6755db1c | 556 | case RPORT_ST_PLOGI: |
4b2164d4 | 557 | rdata->flags &= ~FC_RP_STARTED; |
9fb9d328 | 558 | fc_rport_enter_delete(rdata, RPORT_EV_FAILED); |
6755db1c CL |
559 | break; |
560 | case RPORT_ST_RTV: | |
9fb9d328 | 561 | fc_rport_enter_ready(rdata); |
6755db1c | 562 | break; |
370c3bd0 JE |
563 | case RPORT_ST_PRLI: |
564 | case RPORT_ST_ADISC: | |
565 | fc_rport_enter_logo(rdata); | |
566 | break; | |
a7b12a27 | 567 | case RPORT_ST_PLOGI_WAIT: |
14194054 | 568 | case RPORT_ST_DELETE: |
6755db1c CL |
569 | case RPORT_ST_READY: |
570 | case RPORT_ST_INIT: | |
571 | break; | |
42e9a92f RL |
572 | } |
573 | } | |
574 | ||
6755db1c | 575 | /** |
3a3b42bf RL |
576 | * fc_rport_error_retry() - Handler for remote port state retries |
577 | * @rdata: The remote port whose state is to be retried | |
578 | * @fp: The error code encapsulated in a frame pointer | |
6755db1c CL |
579 | * |
580 | * If the error was an exchange timeout retry immediately, | |
581 | * otherwise wait for E_D_TOV. | |
582 | * | |
583 | * Locking Note: The rport lock is expected to be held before | |
584 | * calling this routine | |
585 | */ | |
9fb9d328 JE |
586 | static void fc_rport_error_retry(struct fc_rport_priv *rdata, |
587 | struct fc_frame *fp) | |
6755db1c | 588 | { |
a586069b | 589 | unsigned long delay = msecs_to_jiffies(FC_DEF_E_D_TOV); |
6755db1c CL |
590 | |
591 | /* make sure this isn't an FC_EX_CLOSED error, never retry those */ | |
592 | if (PTR_ERR(fp) == -FC_EX_CLOSED) | |
28a4af1e | 593 | goto out; |
6755db1c | 594 | |
a3666955 | 595 | if (rdata->retries < rdata->local_port->max_rport_retry_count) { |
9fb9d328 JE |
596 | FC_RPORT_DBG(rdata, "Error %ld in state %s, retrying\n", |
597 | PTR_ERR(fp), fc_rport_state(rdata)); | |
6755db1c CL |
598 | rdata->retries++; |
599 | /* no additional delay on exchange timeouts */ | |
600 | if (PTR_ERR(fp) == -FC_EX_TIMEOUT) | |
601 | delay = 0; | |
6755db1c CL |
602 | schedule_delayed_work(&rdata->retry_work, delay); |
603 | return; | |
604 | } | |
605 | ||
28a4af1e HD |
606 | out: |
607 | fc_rport_error(rdata, fp); | |
6755db1c CL |
608 | } |
609 | ||
42e9a92f | 610 | /** |
a7b12a27 JE |
611 | * fc_rport_login_complete() - Handle parameters and completion of p-mp login. |
612 | * @rdata: The remote port which we logged into or which logged into us. | |
613 | * @fp: The FLOGI or PLOGI request or response frame | |
614 | * | |
615 | * Returns non-zero error if a problem is detected with the frame. | |
616 | * Does not free the frame. | |
617 | * | |
618 | * This is only used in point-to-multipoint mode for FIP currently. | |
619 | */ | |
620 | static int fc_rport_login_complete(struct fc_rport_priv *rdata, | |
621 | struct fc_frame *fp) | |
622 | { | |
623 | struct fc_lport *lport = rdata->local_port; | |
624 | struct fc_els_flogi *flogi; | |
625 | unsigned int e_d_tov; | |
626 | u16 csp_flags; | |
627 | ||
628 | flogi = fc_frame_payload_get(fp, sizeof(*flogi)); | |
629 | if (!flogi) | |
630 | return -EINVAL; | |
631 | ||
632 | csp_flags = ntohs(flogi->fl_csp.sp_features); | |
633 | ||
634 | if (fc_frame_payload_op(fp) == ELS_FLOGI) { | |
635 | if (csp_flags & FC_SP_FT_FPORT) { | |
636 | FC_RPORT_DBG(rdata, "Fabric bit set in FLOGI\n"); | |
637 | return -EINVAL; | |
638 | } | |
639 | } else { | |
640 | ||
641 | /* | |
642 | * E_D_TOV is not valid on an incoming FLOGI request. | |
643 | */ | |
644 | e_d_tov = ntohl(flogi->fl_csp.sp_e_d_tov); | |
645 | if (csp_flags & FC_SP_FT_EDTR) | |
646 | e_d_tov /= 1000000; | |
647 | if (e_d_tov > rdata->e_d_tov) | |
648 | rdata->e_d_tov = e_d_tov; | |
649 | } | |
650 | rdata->maxframe_size = fc_plogi_get_maxframe(flogi, lport->mfs); | |
651 | return 0; | |
652 | } | |
653 | ||
654 | /** | |
655 | * fc_rport_flogi_resp() - Handle response to FLOGI request for p-mp mode | |
656 | * @sp: The sequence that the FLOGI was on | |
657 | * @fp: The FLOGI response frame | |
658 | * @rp_arg: The remote port that received the FLOGI response | |
659 | */ | |
c6b21c93 BVA |
660 | static void fc_rport_flogi_resp(struct fc_seq *sp, struct fc_frame *fp, |
661 | void *rp_arg) | |
a7b12a27 JE |
662 | { |
663 | struct fc_rport_priv *rdata = rp_arg; | |
664 | struct fc_lport *lport = rdata->local_port; | |
665 | struct fc_els_flogi *flogi; | |
666 | unsigned int r_a_tov; | |
667 | ||
668 | FC_RPORT_DBG(rdata, "Received a FLOGI %s\n", fc_els_resp_type(fp)); | |
669 | ||
670 | if (fp == ERR_PTR(-FC_EX_CLOSED)) | |
0e9e3d3b | 671 | goto put; |
a7b12a27 JE |
672 | |
673 | mutex_lock(&rdata->rp_mutex); | |
674 | ||
675 | if (rdata->rp_state != RPORT_ST_FLOGI) { | |
676 | FC_RPORT_DBG(rdata, "Received a FLOGI response, but in state " | |
677 | "%s\n", fc_rport_state(rdata)); | |
678 | if (IS_ERR(fp)) | |
679 | goto err; | |
680 | goto out; | |
681 | } | |
682 | ||
683 | if (IS_ERR(fp)) { | |
684 | fc_rport_error(rdata, fp); | |
685 | goto err; | |
686 | } | |
687 | ||
688 | if (fc_frame_payload_op(fp) != ELS_LS_ACC) | |
689 | goto bad; | |
690 | if (fc_rport_login_complete(rdata, fp)) | |
691 | goto bad; | |
692 | ||
693 | flogi = fc_frame_payload_get(fp, sizeof(*flogi)); | |
694 | if (!flogi) | |
695 | goto bad; | |
696 | r_a_tov = ntohl(flogi->fl_csp.sp_r_a_tov); | |
697 | if (r_a_tov > rdata->r_a_tov) | |
698 | rdata->r_a_tov = r_a_tov; | |
699 | ||
700 | if (rdata->ids.port_name < lport->wwpn) | |
701 | fc_rport_enter_plogi(rdata); | |
702 | else | |
703 | fc_rport_state_enter(rdata, RPORT_ST_PLOGI_WAIT); | |
704 | out: | |
705 | fc_frame_free(fp); | |
706 | err: | |
707 | mutex_unlock(&rdata->rp_mutex); | |
0e9e3d3b | 708 | put: |
baa6719f | 709 | kref_put(&rdata->kref, lport->tt.rport_destroy); |
a7b12a27 JE |
710 | return; |
711 | bad: | |
712 | FC_RPORT_DBG(rdata, "Bad FLOGI response\n"); | |
713 | fc_rport_error_retry(rdata, fp); | |
714 | goto out; | |
715 | } | |
716 | ||
717 | /** | |
718 | * fc_rport_enter_flogi() - Send a FLOGI request to the remote port for p-mp | |
719 | * @rdata: The remote port to send a FLOGI to | |
720 | * | |
721 | * Locking Note: The rport lock is expected to be held before calling | |
722 | * this routine. | |
723 | */ | |
724 | static void fc_rport_enter_flogi(struct fc_rport_priv *rdata) | |
725 | { | |
726 | struct fc_lport *lport = rdata->local_port; | |
727 | struct fc_frame *fp; | |
728 | ||
729 | if (!lport->point_to_multipoint) | |
730 | return fc_rport_enter_plogi(rdata); | |
731 | ||
732 | FC_RPORT_DBG(rdata, "Entered FLOGI state from %s state\n", | |
733 | fc_rport_state(rdata)); | |
734 | ||
735 | fc_rport_state_enter(rdata, RPORT_ST_FLOGI); | |
736 | ||
737 | fp = fc_frame_alloc(lport, sizeof(struct fc_els_flogi)); | |
738 | if (!fp) | |
739 | return fc_rport_error_retry(rdata, fp); | |
740 | ||
741 | if (!lport->tt.elsct_send(lport, rdata->ids.port_id, fp, ELS_FLOGI, | |
742 | fc_rport_flogi_resp, rdata, | |
743 | 2 * lport->r_a_tov)) | |
744 | fc_rport_error_retry(rdata, NULL); | |
745 | else | |
746 | kref_get(&rdata->kref); | |
747 | } | |
748 | ||
749 | /** | |
750 | * fc_rport_recv_flogi_req() - Handle Fabric Login (FLOGI) request in p-mp mode | |
751 | * @lport: The local port that received the PLOGI request | |
a7b12a27 JE |
752 | * @rx_fp: The PLOGI request frame |
753 | */ | |
754 | static void fc_rport_recv_flogi_req(struct fc_lport *lport, | |
92261156 | 755 | struct fc_frame *rx_fp) |
a7b12a27 JE |
756 | { |
757 | struct fc_disc *disc; | |
758 | struct fc_els_flogi *flp; | |
759 | struct fc_rport_priv *rdata; | |
760 | struct fc_frame *fp = rx_fp; | |
a7b12a27 | 761 | struct fc_seq_els_data rjt_data; |
24f089e2 | 762 | u32 sid; |
a7b12a27 | 763 | |
251748a9 | 764 | sid = fc_frame_sid(fp); |
a7b12a27 JE |
765 | |
766 | FC_RPORT_ID_DBG(lport, sid, "Received FLOGI request\n"); | |
767 | ||
768 | disc = &lport->disc; | |
a7b12a27 JE |
769 | if (!lport->point_to_multipoint) { |
770 | rjt_data.reason = ELS_RJT_UNSUP; | |
771 | rjt_data.explan = ELS_EXPL_NONE; | |
772 | goto reject; | |
773 | } | |
774 | ||
775 | flp = fc_frame_payload_get(fp, sizeof(*flp)); | |
776 | if (!flp) { | |
777 | rjt_data.reason = ELS_RJT_LOGIC; | |
778 | rjt_data.explan = ELS_EXPL_INV_LEN; | |
779 | goto reject; | |
780 | } | |
781 | ||
782 | rdata = lport->tt.rport_lookup(lport, sid); | |
783 | if (!rdata) { | |
784 | rjt_data.reason = ELS_RJT_FIP; | |
785 | rjt_data.explan = ELS_EXPL_NOT_NEIGHBOR; | |
786 | goto reject; | |
787 | } | |
788 | mutex_lock(&rdata->rp_mutex); | |
789 | ||
790 | FC_RPORT_DBG(rdata, "Received FLOGI in %s state\n", | |
791 | fc_rport_state(rdata)); | |
792 | ||
793 | switch (rdata->rp_state) { | |
794 | case RPORT_ST_INIT: | |
48058481 KP |
795 | /* |
796 | * If received the FLOGI request on RPORT which is INIT state | |
797 | * (means not transition to FLOGI either fc_rport timeout | |
798 | * function didn;t trigger or this end hasn;t received | |
799 | * beacon yet from other end. In that case only, allow RPORT | |
800 | * state machine to continue, otherwise fall through which | |
801 | * causes the code to send reject response. | |
802 | * NOTE; Not checking for FIP->state such as VNMP_UP or | |
803 | * VNMP_CLAIM because if FIP state is not one of those, | |
804 | * RPORT wouldn;t have created and 'rport_lookup' would have | |
805 | * failed anyway in that case. | |
806 | */ | |
807 | if (lport->point_to_multipoint) | |
808 | break; | |
a7b12a27 JE |
809 | case RPORT_ST_DELETE: |
810 | mutex_unlock(&rdata->rp_mutex); | |
811 | rjt_data.reason = ELS_RJT_FIP; | |
812 | rjt_data.explan = ELS_EXPL_NOT_NEIGHBOR; | |
baa6719f | 813 | goto reject_put; |
a7b12a27 JE |
814 | case RPORT_ST_FLOGI: |
815 | case RPORT_ST_PLOGI_WAIT: | |
816 | case RPORT_ST_PLOGI: | |
817 | break; | |
818 | case RPORT_ST_PRLI: | |
819 | case RPORT_ST_RTV: | |
820 | case RPORT_ST_READY: | |
821 | case RPORT_ST_ADISC: | |
822 | /* | |
823 | * Set the remote port to be deleted and to then restart. | |
824 | * This queues work to be sure exchanges are reset. | |
825 | */ | |
826 | fc_rport_enter_delete(rdata, RPORT_EV_LOGO); | |
827 | mutex_unlock(&rdata->rp_mutex); | |
828 | rjt_data.reason = ELS_RJT_BUSY; | |
829 | rjt_data.explan = ELS_EXPL_NONE; | |
baa6719f | 830 | goto reject_put; |
a7b12a27 JE |
831 | } |
832 | if (fc_rport_login_complete(rdata, fp)) { | |
833 | mutex_unlock(&rdata->rp_mutex); | |
834 | rjt_data.reason = ELS_RJT_LOGIC; | |
835 | rjt_data.explan = ELS_EXPL_NONE; | |
baa6719f | 836 | goto reject_put; |
a7b12a27 | 837 | } |
a7b12a27 JE |
838 | |
839 | fp = fc_frame_alloc(lport, sizeof(*flp)); | |
840 | if (!fp) | |
841 | goto out; | |
842 | ||
a7b12a27 JE |
843 | fc_flogi_fill(lport, fp); |
844 | flp = fc_frame_payload_get(fp, sizeof(*flp)); | |
845 | flp->fl_cmd = ELS_LS_ACC; | |
846 | ||
24f089e2 JE |
847 | fc_fill_reply_hdr(fp, rx_fp, FC_RCTL_ELS_REP, 0); |
848 | lport->tt.frame_send(lport, fp); | |
a7b12a27 JE |
849 | |
850 | if (rdata->ids.port_name < lport->wwpn) | |
851 | fc_rport_enter_plogi(rdata); | |
852 | else | |
853 | fc_rport_state_enter(rdata, RPORT_ST_PLOGI_WAIT); | |
854 | out: | |
855 | mutex_unlock(&rdata->rp_mutex); | |
baa6719f | 856 | kref_put(&rdata->kref, lport->tt.rport_destroy); |
24f089e2 | 857 | fc_frame_free(rx_fp); |
a7b12a27 JE |
858 | return; |
859 | ||
baa6719f HR |
860 | reject_put: |
861 | kref_put(&rdata->kref, lport->tt.rport_destroy); | |
a7b12a27 | 862 | reject: |
92261156 | 863 | lport->tt.seq_els_rsp_send(rx_fp, ELS_LS_RJT, &rjt_data); |
24f089e2 | 864 | fc_frame_free(rx_fp); |
a7b12a27 JE |
865 | } |
866 | ||
867 | /** | |
868 | * fc_rport_plogi_resp() - Handler for ELS PLOGI responses | |
3a3b42bf RL |
869 | * @sp: The sequence the PLOGI is on |
870 | * @fp: The PLOGI response frame | |
871 | * @rdata_arg: The remote port that sent the PLOGI response | |
42e9a92f RL |
872 | * |
873 | * Locking Note: This function will be called without the rport lock | |
874 | * held, but it will lock, call an _enter_* function or fc_rport_error | |
875 | * and then unlock the rport. | |
876 | */ | |
877 | static void fc_rport_plogi_resp(struct fc_seq *sp, struct fc_frame *fp, | |
9fb9d328 | 878 | void *rdata_arg) |
42e9a92f | 879 | { |
9fb9d328 | 880 | struct fc_rport_priv *rdata = rdata_arg; |
42e9a92f | 881 | struct fc_lport *lport = rdata->local_port; |
a29e7646 | 882 | struct fc_els_flogi *plp = NULL; |
42e9a92f RL |
883 | u16 csp_seq; |
884 | u16 cssp_seq; | |
885 | u8 op; | |
886 | ||
887 | mutex_lock(&rdata->rp_mutex); | |
888 | ||
f657d299 | 889 | FC_RPORT_DBG(rdata, "Received a PLOGI %s\n", fc_els_resp_type(fp)); |
42e9a92f RL |
890 | |
891 | if (rdata->rp_state != RPORT_ST_PLOGI) { | |
9fb9d328 JE |
892 | FC_RPORT_DBG(rdata, "Received a PLOGI response, but in state " |
893 | "%s\n", fc_rport_state(rdata)); | |
76f6804e AJ |
894 | if (IS_ERR(fp)) |
895 | goto err; | |
42e9a92f RL |
896 | goto out; |
897 | } | |
898 | ||
76f6804e | 899 | if (IS_ERR(fp)) { |
9fb9d328 | 900 | fc_rport_error_retry(rdata, fp); |
76f6804e AJ |
901 | goto err; |
902 | } | |
903 | ||
42e9a92f RL |
904 | op = fc_frame_payload_op(fp); |
905 | if (op == ELS_LS_ACC && | |
906 | (plp = fc_frame_payload_get(fp, sizeof(*plp))) != NULL) { | |
f211fa51 JE |
907 | rdata->ids.port_name = get_unaligned_be64(&plp->fl_wwpn); |
908 | rdata->ids.node_name = get_unaligned_be64(&plp->fl_wwnn); | |
42e9a92f | 909 | |
75a2792d BPG |
910 | /* save plogi response sp_features for further reference */ |
911 | rdata->sp_features = ntohs(plp->fl_csp.sp_features); | |
912 | ||
a7b12a27 JE |
913 | if (lport->point_to_multipoint) |
914 | fc_rport_login_complete(rdata, fp); | |
42e9a92f RL |
915 | csp_seq = ntohs(plp->fl_csp.sp_tot_seq); |
916 | cssp_seq = ntohs(plp->fl_cssp[3 - 1].cp_con_seq); | |
917 | if (cssp_seq < csp_seq) | |
918 | csp_seq = cssp_seq; | |
919 | rdata->max_seq = csp_seq; | |
f211fa51 | 920 | rdata->maxframe_size = fc_plogi_get_maxframe(plp, lport->mfs); |
3ac6f98f | 921 | fc_rport_enter_prli(rdata); |
42e9a92f | 922 | } else |
9fb9d328 | 923 | fc_rport_error_retry(rdata, fp); |
42e9a92f RL |
924 | |
925 | out: | |
926 | fc_frame_free(fp); | |
927 | err: | |
928 | mutex_unlock(&rdata->rp_mutex); | |
baa6719f | 929 | kref_put(&rdata->kref, lport->tt.rport_destroy); |
42e9a92f RL |
930 | } |
931 | ||
e0335f67 MR |
932 | static bool |
933 | fc_rport_compatible_roles(struct fc_lport *lport, struct fc_rport_priv *rdata) | |
934 | { | |
935 | if (rdata->ids.roles == FC_PORT_ROLE_UNKNOWN) | |
936 | return true; | |
937 | if ((rdata->ids.roles & FC_PORT_ROLE_FCP_TARGET) && | |
938 | (lport->service_params & FCP_SPPF_INIT_FCN)) | |
939 | return true; | |
940 | if ((rdata->ids.roles & FC_PORT_ROLE_FCP_INITIATOR) && | |
941 | (lport->service_params & FCP_SPPF_TARG_FCN)) | |
942 | return true; | |
943 | return false; | |
944 | } | |
945 | ||
42e9a92f | 946 | /** |
3a3b42bf RL |
947 | * fc_rport_enter_plogi() - Send Port Login (PLOGI) request |
948 | * @rdata: The remote port to send a PLOGI to | |
42e9a92f RL |
949 | * |
950 | * Locking Note: The rport lock is expected to be held before calling | |
951 | * this routine. | |
952 | */ | |
9fb9d328 | 953 | static void fc_rport_enter_plogi(struct fc_rport_priv *rdata) |
42e9a92f | 954 | { |
42e9a92f RL |
955 | struct fc_lport *lport = rdata->local_port; |
956 | struct fc_frame *fp; | |
957 | ||
e0335f67 MR |
958 | if (!fc_rport_compatible_roles(lport, rdata)) { |
959 | FC_RPORT_DBG(rdata, "PLOGI suppressed for incompatible role\n"); | |
960 | fc_rport_state_enter(rdata, RPORT_ST_PLOGI_WAIT); | |
961 | return; | |
962 | } | |
963 | ||
9fb9d328 JE |
964 | FC_RPORT_DBG(rdata, "Port entered PLOGI state from %s state\n", |
965 | fc_rport_state(rdata)); | |
42e9a92f | 966 | |
9fb9d328 | 967 | fc_rport_state_enter(rdata, RPORT_ST_PLOGI); |
42e9a92f | 968 | |
f211fa51 | 969 | rdata->maxframe_size = FC_MIN_MAX_PAYLOAD; |
42e9a92f RL |
970 | fp = fc_frame_alloc(lport, sizeof(struct fc_els_flogi)); |
971 | if (!fp) { | |
a7b12a27 | 972 | FC_RPORT_DBG(rdata, "%s frame alloc failed\n", __func__); |
9fb9d328 | 973 | fc_rport_error_retry(rdata, fp); |
42e9a92f RL |
974 | return; |
975 | } | |
976 | rdata->e_d_tov = lport->e_d_tov; | |
977 | ||
f211fa51 | 978 | if (!lport->tt.elsct_send(lport, rdata->ids.port_id, fp, ELS_PLOGI, |
b94f8951 JE |
979 | fc_rport_plogi_resp, rdata, |
980 | 2 * lport->r_a_tov)) | |
8f550f93 | 981 | fc_rport_error_retry(rdata, NULL); |
42e9a92f | 982 | else |
f211fa51 | 983 | kref_get(&rdata->kref); |
42e9a92f RL |
984 | } |
985 | ||
986 | /** | |
34f42a07 | 987 | * fc_rport_prli_resp() - Process Login (PRLI) response handler |
3a3b42bf RL |
988 | * @sp: The sequence the PRLI response was on |
989 | * @fp: The PRLI response frame | |
990 | * @rdata_arg: The remote port that sent the PRLI response | |
42e9a92f RL |
991 | * |
992 | * Locking Note: This function will be called without the rport lock | |
993 | * held, but it will lock, call an _enter_* function or fc_rport_error | |
994 | * and then unlock the rport. | |
995 | */ | |
996 | static void fc_rport_prli_resp(struct fc_seq *sp, struct fc_frame *fp, | |
9fb9d328 | 997 | void *rdata_arg) |
42e9a92f | 998 | { |
9fb9d328 | 999 | struct fc_rport_priv *rdata = rdata_arg; |
42e9a92f RL |
1000 | struct { |
1001 | struct fc_els_prli prli; | |
1002 | struct fc_els_spp spp; | |
1003 | } *pp; | |
925cedae JE |
1004 | struct fc_els_spp temp_spp; |
1005 | struct fc4_prov *prov; | |
42e9a92f RL |
1006 | u32 roles = FC_RPORT_ROLE_UNKNOWN; |
1007 | u32 fcp_parm = 0; | |
1008 | u8 op; | |
618461c0 | 1009 | u8 resp_code = 0; |
42e9a92f RL |
1010 | |
1011 | mutex_lock(&rdata->rp_mutex); | |
1012 | ||
f657d299 | 1013 | FC_RPORT_DBG(rdata, "Received a PRLI %s\n", fc_els_resp_type(fp)); |
42e9a92f RL |
1014 | |
1015 | if (rdata->rp_state != RPORT_ST_PRLI) { | |
9fb9d328 JE |
1016 | FC_RPORT_DBG(rdata, "Received a PRLI response, but in state " |
1017 | "%s\n", fc_rport_state(rdata)); | |
76f6804e AJ |
1018 | if (IS_ERR(fp)) |
1019 | goto err; | |
42e9a92f RL |
1020 | goto out; |
1021 | } | |
1022 | ||
76f6804e | 1023 | if (IS_ERR(fp)) { |
9fb9d328 | 1024 | fc_rport_error_retry(rdata, fp); |
76f6804e AJ |
1025 | goto err; |
1026 | } | |
1027 | ||
6bd054cb RL |
1028 | /* reinitialize remote port roles */ |
1029 | rdata->ids.roles = FC_RPORT_ROLE_UNKNOWN; | |
1030 | ||
42e9a92f RL |
1031 | op = fc_frame_payload_op(fp); |
1032 | if (op == ELS_LS_ACC) { | |
1033 | pp = fc_frame_payload_get(fp, sizeof(*pp)); | |
618461c0 BPG |
1034 | if (!pp) |
1035 | goto out; | |
1036 | ||
1037 | resp_code = (pp->spp.spp_flags & FC_SPP_RESP_MASK); | |
1038 | FC_RPORT_DBG(rdata, "PRLI spp_flags = 0x%x\n", | |
1039 | pp->spp.spp_flags); | |
75a2792d | 1040 | rdata->spp_type = pp->spp.spp_type; |
618461c0 BPG |
1041 | if (resp_code != FC_SPP_RESP_ACK) { |
1042 | if (resp_code == FC_SPP_RESP_CONF) | |
1043 | fc_rport_error(rdata, fp); | |
1044 | else | |
1045 | fc_rport_error_retry(rdata, fp); | |
1046 | goto out; | |
42e9a92f | 1047 | } |
618461c0 BPG |
1048 | if (pp->prli.prli_spp_len < sizeof(pp->spp)) |
1049 | goto out; | |
1050 | ||
1051 | fcp_parm = ntohl(pp->spp.spp_params); | |
1052 | if (fcp_parm & FCP_SPPF_RETRY) | |
1053 | rdata->flags |= FC_RP_FLAGS_RETRY; | |
75a2792d BPG |
1054 | if (fcp_parm & FCP_SPPF_CONF_COMPL) |
1055 | rdata->flags |= FC_RP_FLAGS_CONF_REQ; | |
42e9a92f | 1056 | |
925cedae JE |
1057 | prov = fc_passive_prov[FC_TYPE_FCP]; |
1058 | if (prov) { | |
1059 | memset(&temp_spp, 0, sizeof(temp_spp)); | |
1060 | prov->prli(rdata, pp->prli.prli_spp_len, | |
1061 | &pp->spp, &temp_spp); | |
1062 | } | |
1063 | ||
f211fa51 | 1064 | rdata->supported_classes = FC_COS_CLASS3; |
42e9a92f RL |
1065 | if (fcp_parm & FCP_SPPF_INIT_FCN) |
1066 | roles |= FC_RPORT_ROLE_FCP_INITIATOR; | |
1067 | if (fcp_parm & FCP_SPPF_TARG_FCN) | |
1068 | roles |= FC_RPORT_ROLE_FCP_TARGET; | |
1069 | ||
f211fa51 | 1070 | rdata->ids.roles = roles; |
9fb9d328 | 1071 | fc_rport_enter_rtv(rdata); |
42e9a92f RL |
1072 | |
1073 | } else { | |
9fb9d328 | 1074 | FC_RPORT_DBG(rdata, "Bad ELS response for PRLI command\n"); |
292e40b9 | 1075 | fc_rport_error_retry(rdata, fp); |
42e9a92f RL |
1076 | } |
1077 | ||
1078 | out: | |
1079 | fc_frame_free(fp); | |
1080 | err: | |
1081 | mutex_unlock(&rdata->rp_mutex); | |
f211fa51 | 1082 | kref_put(&rdata->kref, rdata->local_port->tt.rport_destroy); |
42e9a92f RL |
1083 | } |
1084 | ||
42e9a92f | 1085 | /** |
3a3b42bf RL |
1086 | * fc_rport_enter_prli() - Send Process Login (PRLI) request |
1087 | * @rdata: The remote port to send the PRLI request to | |
42e9a92f RL |
1088 | * |
1089 | * Locking Note: The rport lock is expected to be held before calling | |
1090 | * this routine. | |
1091 | */ | |
9fb9d328 | 1092 | static void fc_rport_enter_prli(struct fc_rport_priv *rdata) |
42e9a92f | 1093 | { |
42e9a92f RL |
1094 | struct fc_lport *lport = rdata->local_port; |
1095 | struct { | |
1096 | struct fc_els_prli prli; | |
1097 | struct fc_els_spp spp; | |
1098 | } *pp; | |
1099 | struct fc_frame *fp; | |
925cedae | 1100 | struct fc4_prov *prov; |
42e9a92f | 1101 | |
3ac6f98f JE |
1102 | /* |
1103 | * If the rport is one of the well known addresses | |
1104 | * we skip PRLI and RTV and go straight to READY. | |
1105 | */ | |
1106 | if (rdata->ids.port_id >= FC_FID_DOM_MGR) { | |
1107 | fc_rport_enter_ready(rdata); | |
1108 | return; | |
1109 | } | |
1110 | ||
9fb9d328 JE |
1111 | FC_RPORT_DBG(rdata, "Port entered PRLI state from %s state\n", |
1112 | fc_rport_state(rdata)); | |
42e9a92f | 1113 | |
9fb9d328 | 1114 | fc_rport_state_enter(rdata, RPORT_ST_PRLI); |
42e9a92f RL |
1115 | |
1116 | fp = fc_frame_alloc(lport, sizeof(*pp)); | |
1117 | if (!fp) { | |
9fb9d328 | 1118 | fc_rport_error_retry(rdata, fp); |
42e9a92f RL |
1119 | return; |
1120 | } | |
1121 | ||
925cedae JE |
1122 | fc_prli_fill(lport, fp); |
1123 | ||
1124 | prov = fc_passive_prov[FC_TYPE_FCP]; | |
1125 | if (prov) { | |
1126 | pp = fc_frame_payload_get(fp, sizeof(*pp)); | |
1127 | prov->prli(rdata, sizeof(pp->spp), NULL, &pp->spp); | |
1128 | } | |
1129 | ||
1130 | fc_fill_fc_hdr(fp, FC_RCTL_ELS_REQ, rdata->ids.port_id, | |
1131 | fc_host_port_id(lport->host), FC_TYPE_ELS, | |
1132 | FC_FC_FIRST_SEQ | FC_FC_END_SEQ | FC_FC_SEQ_INIT, 0); | |
1133 | ||
1134 | if (!lport->tt.exch_seq_send(lport, fp, fc_rport_prli_resp, | |
1135 | NULL, rdata, 2 * lport->r_a_tov)) | |
8f550f93 | 1136 | fc_rport_error_retry(rdata, NULL); |
42e9a92f | 1137 | else |
f211fa51 | 1138 | kref_get(&rdata->kref); |
42e9a92f RL |
1139 | } |
1140 | ||
1141 | /** | |
3a3b42bf RL |
1142 | * fc_rport_els_rtv_resp() - Handler for Request Timeout Value (RTV) responses |
1143 | * @sp: The sequence the RTV was on | |
1144 | * @fp: The RTV response frame | |
1145 | * @rdata_arg: The remote port that sent the RTV response | |
42e9a92f RL |
1146 | * |
1147 | * Many targets don't seem to support this. | |
1148 | * | |
1149 | * Locking Note: This function will be called without the rport lock | |
1150 | * held, but it will lock, call an _enter_* function or fc_rport_error | |
1151 | * and then unlock the rport. | |
1152 | */ | |
1153 | static void fc_rport_rtv_resp(struct fc_seq *sp, struct fc_frame *fp, | |
9fb9d328 | 1154 | void *rdata_arg) |
42e9a92f | 1155 | { |
9fb9d328 | 1156 | struct fc_rport_priv *rdata = rdata_arg; |
42e9a92f RL |
1157 | u8 op; |
1158 | ||
1159 | mutex_lock(&rdata->rp_mutex); | |
1160 | ||
f657d299 | 1161 | FC_RPORT_DBG(rdata, "Received a RTV %s\n", fc_els_resp_type(fp)); |
42e9a92f RL |
1162 | |
1163 | if (rdata->rp_state != RPORT_ST_RTV) { | |
9fb9d328 JE |
1164 | FC_RPORT_DBG(rdata, "Received a RTV response, but in state " |
1165 | "%s\n", fc_rport_state(rdata)); | |
76f6804e AJ |
1166 | if (IS_ERR(fp)) |
1167 | goto err; | |
42e9a92f RL |
1168 | goto out; |
1169 | } | |
1170 | ||
76f6804e | 1171 | if (IS_ERR(fp)) { |
9fb9d328 | 1172 | fc_rport_error(rdata, fp); |
76f6804e AJ |
1173 | goto err; |
1174 | } | |
1175 | ||
42e9a92f RL |
1176 | op = fc_frame_payload_op(fp); |
1177 | if (op == ELS_LS_ACC) { | |
1178 | struct fc_els_rtv_acc *rtv; | |
1179 | u32 toq; | |
1180 | u32 tov; | |
1181 | ||
1182 | rtv = fc_frame_payload_get(fp, sizeof(*rtv)); | |
1183 | if (rtv) { | |
1184 | toq = ntohl(rtv->rtv_toq); | |
1185 | tov = ntohl(rtv->rtv_r_a_tov); | |
1186 | if (tov == 0) | |
1187 | tov = 1; | |
1188 | rdata->r_a_tov = tov; | |
1189 | tov = ntohl(rtv->rtv_e_d_tov); | |
1190 | if (toq & FC_ELS_RTV_EDRES) | |
1191 | tov /= 1000000; | |
1192 | if (tov == 0) | |
1193 | tov = 1; | |
1194 | rdata->e_d_tov = tov; | |
1195 | } | |
1196 | } | |
1197 | ||
9fb9d328 | 1198 | fc_rport_enter_ready(rdata); |
42e9a92f RL |
1199 | |
1200 | out: | |
1201 | fc_frame_free(fp); | |
1202 | err: | |
1203 | mutex_unlock(&rdata->rp_mutex); | |
f211fa51 | 1204 | kref_put(&rdata->kref, rdata->local_port->tt.rport_destroy); |
42e9a92f RL |
1205 | } |
1206 | ||
1207 | /** | |
3a3b42bf RL |
1208 | * fc_rport_enter_rtv() - Send Request Timeout Value (RTV) request |
1209 | * @rdata: The remote port to send the RTV request to | |
42e9a92f RL |
1210 | * |
1211 | * Locking Note: The rport lock is expected to be held before calling | |
1212 | * this routine. | |
1213 | */ | |
9fb9d328 | 1214 | static void fc_rport_enter_rtv(struct fc_rport_priv *rdata) |
42e9a92f RL |
1215 | { |
1216 | struct fc_frame *fp; | |
42e9a92f RL |
1217 | struct fc_lport *lport = rdata->local_port; |
1218 | ||
9fb9d328 JE |
1219 | FC_RPORT_DBG(rdata, "Port entered RTV state from %s state\n", |
1220 | fc_rport_state(rdata)); | |
42e9a92f | 1221 | |
9fb9d328 | 1222 | fc_rport_state_enter(rdata, RPORT_ST_RTV); |
42e9a92f RL |
1223 | |
1224 | fp = fc_frame_alloc(lport, sizeof(struct fc_els_rtv)); | |
1225 | if (!fp) { | |
9fb9d328 | 1226 | fc_rport_error_retry(rdata, fp); |
42e9a92f RL |
1227 | return; |
1228 | } | |
1229 | ||
f211fa51 | 1230 | if (!lport->tt.elsct_send(lport, rdata->ids.port_id, fp, ELS_RTV, |
b94f8951 JE |
1231 | fc_rport_rtv_resp, rdata, |
1232 | 2 * lport->r_a_tov)) | |
8f550f93 | 1233 | fc_rport_error_retry(rdata, NULL); |
42e9a92f | 1234 | else |
f211fa51 | 1235 | kref_get(&rdata->kref); |
42e9a92f RL |
1236 | } |
1237 | ||
079ecd8c JE |
1238 | /** |
1239 | * fc_rport_logo_resp() - Handler for logout (LOGO) responses | |
1240 | * @sp: The sequence the LOGO was on | |
1241 | * @fp: The LOGO response frame | |
1242 | * @lport_arg: The local port | |
1243 | */ | |
1244 | static void fc_rport_logo_resp(struct fc_seq *sp, struct fc_frame *fp, | |
1245 | void *lport_arg) | |
1246 | { | |
1247 | struct fc_lport *lport = lport_arg; | |
1248 | ||
1249 | FC_RPORT_ID_DBG(lport, fc_seq_exch(sp)->did, | |
1250 | "Received a LOGO %s\n", fc_els_resp_type(fp)); | |
1251 | if (IS_ERR(fp)) | |
1252 | return; | |
1253 | fc_frame_free(fp); | |
1254 | } | |
1255 | ||
42e9a92f | 1256 | /** |
3a3b42bf RL |
1257 | * fc_rport_enter_logo() - Send a logout (LOGO) request |
1258 | * @rdata: The remote port to send the LOGO request to | |
42e9a92f RL |
1259 | * |
1260 | * Locking Note: The rport lock is expected to be held before calling | |
1261 | * this routine. | |
1262 | */ | |
9fb9d328 | 1263 | static void fc_rport_enter_logo(struct fc_rport_priv *rdata) |
42e9a92f | 1264 | { |
42e9a92f RL |
1265 | struct fc_lport *lport = rdata->local_port; |
1266 | struct fc_frame *fp; | |
1267 | ||
079ecd8c | 1268 | FC_RPORT_DBG(rdata, "Port sending LOGO from %s state\n", |
9fb9d328 | 1269 | fc_rport_state(rdata)); |
42e9a92f | 1270 | |
42e9a92f | 1271 | fp = fc_frame_alloc(lport, sizeof(struct fc_els_logo)); |
079ecd8c | 1272 | if (!fp) |
42e9a92f | 1273 | return; |
079ecd8c JE |
1274 | (void)lport->tt.elsct_send(lport, rdata->ids.port_id, fp, ELS_LOGO, |
1275 | fc_rport_logo_resp, lport, 0); | |
42e9a92f RL |
1276 | } |
1277 | ||
370c3bd0 | 1278 | /** |
3a3b42bf RL |
1279 | * fc_rport_els_adisc_resp() - Handler for Address Discovery (ADISC) responses |
1280 | * @sp: The sequence the ADISC response was on | |
1281 | * @fp: The ADISC response frame | |
1282 | * @rdata_arg: The remote port that sent the ADISC response | |
370c3bd0 JE |
1283 | * |
1284 | * Locking Note: This function will be called without the rport lock | |
1285 | * held, but it will lock, call an _enter_* function or fc_rport_error | |
1286 | * and then unlock the rport. | |
1287 | */ | |
1288 | static void fc_rport_adisc_resp(struct fc_seq *sp, struct fc_frame *fp, | |
3a3b42bf | 1289 | void *rdata_arg) |
370c3bd0 JE |
1290 | { |
1291 | struct fc_rport_priv *rdata = rdata_arg; | |
1292 | struct fc_els_adisc *adisc; | |
1293 | u8 op; | |
1294 | ||
1295 | mutex_lock(&rdata->rp_mutex); | |
1296 | ||
1297 | FC_RPORT_DBG(rdata, "Received a ADISC response\n"); | |
1298 | ||
1299 | if (rdata->rp_state != RPORT_ST_ADISC) { | |
1300 | FC_RPORT_DBG(rdata, "Received a ADISC resp but in state %s\n", | |
1301 | fc_rport_state(rdata)); | |
1302 | if (IS_ERR(fp)) | |
1303 | goto err; | |
1304 | goto out; | |
1305 | } | |
1306 | ||
1307 | if (IS_ERR(fp)) { | |
1308 | fc_rport_error(rdata, fp); | |
1309 | goto err; | |
1310 | } | |
1311 | ||
1312 | /* | |
1313 | * If address verification failed. Consider us logged out of the rport. | |
1314 | * Since the rport is still in discovery, we want to be | |
1315 | * logged in, so go to PLOGI state. Otherwise, go back to READY. | |
1316 | */ | |
1317 | op = fc_frame_payload_op(fp); | |
1318 | adisc = fc_frame_payload_get(fp, sizeof(*adisc)); | |
1319 | if (op != ELS_LS_ACC || !adisc || | |
1320 | ntoh24(adisc->adisc_port_id) != rdata->ids.port_id || | |
1321 | get_unaligned_be64(&adisc->adisc_wwpn) != rdata->ids.port_name || | |
1322 | get_unaligned_be64(&adisc->adisc_wwnn) != rdata->ids.node_name) { | |
1323 | FC_RPORT_DBG(rdata, "ADISC error or mismatch\n"); | |
a7b12a27 | 1324 | fc_rport_enter_flogi(rdata); |
370c3bd0 JE |
1325 | } else { |
1326 | FC_RPORT_DBG(rdata, "ADISC OK\n"); | |
1327 | fc_rport_enter_ready(rdata); | |
1328 | } | |
1329 | out: | |
1330 | fc_frame_free(fp); | |
1331 | err: | |
1332 | mutex_unlock(&rdata->rp_mutex); | |
1333 | kref_put(&rdata->kref, rdata->local_port->tt.rport_destroy); | |
1334 | } | |
1335 | ||
1336 | /** | |
3a3b42bf RL |
1337 | * fc_rport_enter_adisc() - Send Address Discover (ADISC) request |
1338 | * @rdata: The remote port to send the ADISC request to | |
370c3bd0 JE |
1339 | * |
1340 | * Locking Note: The rport lock is expected to be held before calling | |
1341 | * this routine. | |
1342 | */ | |
1343 | static void fc_rport_enter_adisc(struct fc_rport_priv *rdata) | |
1344 | { | |
1345 | struct fc_lport *lport = rdata->local_port; | |
1346 | struct fc_frame *fp; | |
1347 | ||
1348 | FC_RPORT_DBG(rdata, "sending ADISC from %s state\n", | |
1349 | fc_rport_state(rdata)); | |
1350 | ||
1351 | fc_rport_state_enter(rdata, RPORT_ST_ADISC); | |
1352 | ||
1353 | fp = fc_frame_alloc(lport, sizeof(struct fc_els_adisc)); | |
1354 | if (!fp) { | |
1355 | fc_rport_error_retry(rdata, fp); | |
1356 | return; | |
1357 | } | |
1358 | if (!lport->tt.elsct_send(lport, rdata->ids.port_id, fp, ELS_ADISC, | |
b94f8951 JE |
1359 | fc_rport_adisc_resp, rdata, |
1360 | 2 * lport->r_a_tov)) | |
8f550f93 | 1361 | fc_rport_error_retry(rdata, NULL); |
370c3bd0 JE |
1362 | else |
1363 | kref_get(&rdata->kref); | |
1364 | } | |
1365 | ||
8abbe3a4 | 1366 | /** |
3a3b42bf RL |
1367 | * fc_rport_recv_adisc_req() - Handler for Address Discovery (ADISC) requests |
1368 | * @rdata: The remote port that sent the ADISC request | |
3a3b42bf | 1369 | * @in_fp: The ADISC request frame |
8abbe3a4 JE |
1370 | * |
1371 | * Locking Note: Called with the lport and rport locks held. | |
1372 | */ | |
1373 | static void fc_rport_recv_adisc_req(struct fc_rport_priv *rdata, | |
92261156 | 1374 | struct fc_frame *in_fp) |
8abbe3a4 JE |
1375 | { |
1376 | struct fc_lport *lport = rdata->local_port; | |
1377 | struct fc_frame *fp; | |
8abbe3a4 JE |
1378 | struct fc_els_adisc *adisc; |
1379 | struct fc_seq_els_data rjt_data; | |
8abbe3a4 JE |
1380 | |
1381 | FC_RPORT_DBG(rdata, "Received ADISC request\n"); | |
1382 | ||
1383 | adisc = fc_frame_payload_get(in_fp, sizeof(*adisc)); | |
1384 | if (!adisc) { | |
8abbe3a4 JE |
1385 | rjt_data.reason = ELS_RJT_PROT; |
1386 | rjt_data.explan = ELS_EXPL_INV_LEN; | |
92261156 | 1387 | lport->tt.seq_els_rsp_send(in_fp, ELS_LS_RJT, &rjt_data); |
8abbe3a4 JE |
1388 | goto drop; |
1389 | } | |
1390 | ||
1391 | fp = fc_frame_alloc(lport, sizeof(*adisc)); | |
1392 | if (!fp) | |
1393 | goto drop; | |
1394 | fc_adisc_fill(lport, fp); | |
1395 | adisc = fc_frame_payload_get(fp, sizeof(*adisc)); | |
1396 | adisc->adisc_cmd = ELS_LS_ACC; | |
24f089e2 JE |
1397 | fc_fill_reply_hdr(fp, in_fp, FC_RCTL_ELS_REP, 0); |
1398 | lport->tt.frame_send(lport, fp); | |
8abbe3a4 JE |
1399 | drop: |
1400 | fc_frame_free(in_fp); | |
1401 | } | |
1402 | ||
63e27fb8 YZ |
1403 | /** |
1404 | * fc_rport_recv_rls_req() - Handle received Read Link Status request | |
1405 | * @rdata: The remote port that sent the RLS request | |
63e27fb8 YZ |
1406 | * @rx_fp: The PRLI request frame |
1407 | * | |
1408 | * Locking Note: The rport lock is expected to be held before calling | |
1409 | * this function. | |
1410 | */ | |
1411 | static void fc_rport_recv_rls_req(struct fc_rport_priv *rdata, | |
92261156 | 1412 | struct fc_frame *rx_fp) |
63e27fb8 YZ |
1413 | |
1414 | { | |
1415 | struct fc_lport *lport = rdata->local_port; | |
1416 | struct fc_frame *fp; | |
63e27fb8 YZ |
1417 | struct fc_els_rls *rls; |
1418 | struct fc_els_rls_resp *rsp; | |
1419 | struct fc_els_lesb *lesb; | |
1420 | struct fc_seq_els_data rjt_data; | |
1421 | struct fc_host_statistics *hst; | |
63e27fb8 YZ |
1422 | |
1423 | FC_RPORT_DBG(rdata, "Received RLS request while in state %s\n", | |
1424 | fc_rport_state(rdata)); | |
1425 | ||
1426 | rls = fc_frame_payload_get(rx_fp, sizeof(*rls)); | |
1427 | if (!rls) { | |
1428 | rjt_data.reason = ELS_RJT_PROT; | |
1429 | rjt_data.explan = ELS_EXPL_INV_LEN; | |
1430 | goto out_rjt; | |
1431 | } | |
1432 | ||
1433 | fp = fc_frame_alloc(lport, sizeof(*rsp)); | |
1434 | if (!fp) { | |
1435 | rjt_data.reason = ELS_RJT_UNAB; | |
1436 | rjt_data.explan = ELS_EXPL_INSUF_RES; | |
1437 | goto out_rjt; | |
1438 | } | |
1439 | ||
1440 | rsp = fc_frame_payload_get(fp, sizeof(*rsp)); | |
1441 | memset(rsp, 0, sizeof(*rsp)); | |
1442 | rsp->rls_cmd = ELS_LS_ACC; | |
1443 | lesb = &rsp->rls_lesb; | |
1444 | if (lport->tt.get_lesb) { | |
1445 | /* get LESB from LLD if it supports it */ | |
1446 | lport->tt.get_lesb(lport, lesb); | |
1447 | } else { | |
1448 | fc_get_host_stats(lport->host); | |
1449 | hst = &lport->host_stats; | |
1450 | lesb->lesb_link_fail = htonl(hst->link_failure_count); | |
1451 | lesb->lesb_sync_loss = htonl(hst->loss_of_sync_count); | |
1452 | lesb->lesb_sig_loss = htonl(hst->loss_of_signal_count); | |
1453 | lesb->lesb_prim_err = htonl(hst->prim_seq_protocol_err_count); | |
1454 | lesb->lesb_inv_word = htonl(hst->invalid_tx_word_count); | |
1455 | lesb->lesb_inv_crc = htonl(hst->invalid_crc_count); | |
1456 | } | |
1457 | ||
24f089e2 JE |
1458 | fc_fill_reply_hdr(fp, rx_fp, FC_RCTL_ELS_REP, 0); |
1459 | lport->tt.frame_send(lport, fp); | |
63e27fb8 YZ |
1460 | goto out; |
1461 | ||
1462 | out_rjt: | |
92261156 | 1463 | lport->tt.seq_els_rsp_send(rx_fp, ELS_LS_RJT, &rjt_data); |
63e27fb8 YZ |
1464 | out: |
1465 | fc_frame_free(rx_fp); | |
1466 | } | |
1467 | ||
42e9a92f | 1468 | /** |
3a3b42bf RL |
1469 | * fc_rport_recv_els_req() - Handler for validated ELS requests |
1470 | * @lport: The local port that received the ELS request | |
3a3b42bf | 1471 | * @fp: The ELS request frame |
83fe6a93 JE |
1472 | * |
1473 | * Handle incoming ELS requests that require port login. | |
1474 | * The ELS opcode has already been validated by the caller. | |
42e9a92f | 1475 | * |
131203a1 | 1476 | * Locking Note: Called with the lport lock held. |
42e9a92f | 1477 | */ |
92261156 | 1478 | static void fc_rport_recv_els_req(struct fc_lport *lport, struct fc_frame *fp) |
42e9a92f | 1479 | { |
131203a1 | 1480 | struct fc_rport_priv *rdata; |
42e9a92f | 1481 | struct fc_seq_els_data els_data; |
42e9a92f | 1482 | |
251748a9 | 1483 | rdata = lport->tt.rport_lookup(lport, fc_frame_sid(fp)); |
baa6719f | 1484 | if (!rdata) |
83fe6a93 | 1485 | goto reject; |
baa6719f | 1486 | |
131203a1 JE |
1487 | mutex_lock(&rdata->rp_mutex); |
1488 | ||
83fe6a93 JE |
1489 | switch (rdata->rp_state) { |
1490 | case RPORT_ST_PRLI: | |
1491 | case RPORT_ST_RTV: | |
1492 | case RPORT_ST_READY: | |
370c3bd0 | 1493 | case RPORT_ST_ADISC: |
83fe6a93 JE |
1494 | break; |
1495 | default: | |
1496 | mutex_unlock(&rdata->rp_mutex); | |
baa6719f | 1497 | kref_put(&rdata->kref, lport->tt.rport_destroy); |
83fe6a93 JE |
1498 | goto reject; |
1499 | } | |
1500 | ||
1501 | switch (fc_frame_payload_op(fp)) { | |
131203a1 | 1502 | case ELS_PRLI: |
92261156 | 1503 | fc_rport_recv_prli_req(rdata, fp); |
131203a1 JE |
1504 | break; |
1505 | case ELS_PRLO: | |
92261156 | 1506 | fc_rport_recv_prlo_req(rdata, fp); |
131203a1 | 1507 | break; |
8abbe3a4 | 1508 | case ELS_ADISC: |
92261156 | 1509 | fc_rport_recv_adisc_req(rdata, fp); |
8abbe3a4 | 1510 | break; |
131203a1 | 1511 | case ELS_RRQ: |
92261156 JE |
1512 | lport->tt.seq_els_rsp_send(fp, ELS_RRQ, NULL); |
1513 | fc_frame_free(fp); | |
131203a1 JE |
1514 | break; |
1515 | case ELS_REC: | |
92261156 JE |
1516 | lport->tt.seq_els_rsp_send(fp, ELS_REC, NULL); |
1517 | fc_frame_free(fp); | |
131203a1 | 1518 | break; |
63e27fb8 | 1519 | case ELS_RLS: |
92261156 | 1520 | fc_rport_recv_rls_req(rdata, fp); |
63e27fb8 | 1521 | break; |
131203a1 | 1522 | default: |
83fe6a93 | 1523 | fc_frame_free(fp); /* can't happen */ |
131203a1 | 1524 | break; |
42e9a92f RL |
1525 | } |
1526 | ||
1527 | mutex_unlock(&rdata->rp_mutex); | |
baa6719f | 1528 | kref_put(&rdata->kref, rdata->local_port->tt.rport_destroy); |
83fe6a93 JE |
1529 | return; |
1530 | ||
1531 | reject: | |
92261156 JE |
1532 | els_data.reason = ELS_RJT_UNAB; |
1533 | els_data.explan = ELS_EXPL_PLOGI_REQD; | |
1534 | lport->tt.seq_els_rsp_send(fp, ELS_LS_RJT, &els_data); | |
83fe6a93 JE |
1535 | fc_frame_free(fp); |
1536 | } | |
1537 | ||
1538 | /** | |
3a3b42bf | 1539 | * fc_rport_recv_req() - Handler for requests |
3a3b42bf | 1540 | * @lport: The local port that received the request |
92261156 | 1541 | * @fp: The request frame |
83fe6a93 JE |
1542 | * |
1543 | * Locking Note: Called with the lport lock held. | |
1544 | */ | |
c6b21c93 | 1545 | static void fc_rport_recv_req(struct fc_lport *lport, struct fc_frame *fp) |
83fe6a93 JE |
1546 | { |
1547 | struct fc_seq_els_data els_data; | |
1548 | ||
1549 | /* | |
a7b12a27 | 1550 | * Handle FLOGI, PLOGI and LOGO requests separately, since they |
83fe6a93 JE |
1551 | * don't require prior login. |
1552 | * Check for unsupported opcodes first and reject them. | |
1553 | * For some ops, it would be incorrect to reject with "PLOGI required". | |
1554 | */ | |
1555 | switch (fc_frame_payload_op(fp)) { | |
a7b12a27 | 1556 | case ELS_FLOGI: |
92261156 | 1557 | fc_rport_recv_flogi_req(lport, fp); |
a7b12a27 | 1558 | break; |
83fe6a93 | 1559 | case ELS_PLOGI: |
92261156 | 1560 | fc_rport_recv_plogi_req(lport, fp); |
83fe6a93 JE |
1561 | break; |
1562 | case ELS_LOGO: | |
92261156 | 1563 | fc_rport_recv_logo_req(lport, fp); |
83fe6a93 JE |
1564 | break; |
1565 | case ELS_PRLI: | |
1566 | case ELS_PRLO: | |
8abbe3a4 | 1567 | case ELS_ADISC: |
83fe6a93 JE |
1568 | case ELS_RRQ: |
1569 | case ELS_REC: | |
63e27fb8 | 1570 | case ELS_RLS: |
92261156 | 1571 | fc_rport_recv_els_req(lport, fp); |
83fe6a93 JE |
1572 | break; |
1573 | default: | |
83fe6a93 JE |
1574 | els_data.reason = ELS_RJT_UNSUP; |
1575 | els_data.explan = ELS_EXPL_NONE; | |
92261156 JE |
1576 | lport->tt.seq_els_rsp_send(fp, ELS_LS_RJT, &els_data); |
1577 | fc_frame_free(fp); | |
83fe6a93 JE |
1578 | break; |
1579 | } | |
42e9a92f RL |
1580 | } |
1581 | ||
1582 | /** | |
3a3b42bf RL |
1583 | * fc_rport_recv_plogi_req() - Handler for Port Login (PLOGI) requests |
1584 | * @lport: The local port that received the PLOGI request | |
3a3b42bf | 1585 | * @rx_fp: The PLOGI request frame |
42e9a92f | 1586 | * |
3ac6f98f | 1587 | * Locking Note: The rport lock is held before calling this function. |
42e9a92f | 1588 | */ |
3ac6f98f | 1589 | static void fc_rport_recv_plogi_req(struct fc_lport *lport, |
92261156 | 1590 | struct fc_frame *rx_fp) |
42e9a92f | 1591 | { |
3ac6f98f JE |
1592 | struct fc_disc *disc; |
1593 | struct fc_rport_priv *rdata; | |
42e9a92f | 1594 | struct fc_frame *fp = rx_fp; |
42e9a92f RL |
1595 | struct fc_els_flogi *pl; |
1596 | struct fc_seq_els_data rjt_data; | |
24f089e2 | 1597 | u32 sid; |
42e9a92f | 1598 | |
251748a9 | 1599 | sid = fc_frame_sid(fp); |
42e9a92f | 1600 | |
3ac6f98f | 1601 | FC_RPORT_ID_DBG(lport, sid, "Received PLOGI request\n"); |
42e9a92f | 1602 | |
42e9a92f RL |
1603 | pl = fc_frame_payload_get(fp, sizeof(*pl)); |
1604 | if (!pl) { | |
3ac6f98f JE |
1605 | FC_RPORT_ID_DBG(lport, sid, "Received PLOGI too short\n"); |
1606 | rjt_data.reason = ELS_RJT_PROT; | |
1607 | rjt_data.explan = ELS_EXPL_INV_LEN; | |
1608 | goto reject; | |
42e9a92f | 1609 | } |
3ac6f98f JE |
1610 | |
1611 | disc = &lport->disc; | |
1612 | mutex_lock(&disc->disc_mutex); | |
1613 | rdata = lport->tt.rport_create(lport, sid); | |
1614 | if (!rdata) { | |
1615 | mutex_unlock(&disc->disc_mutex); | |
1616 | rjt_data.reason = ELS_RJT_UNAB; | |
1617 | rjt_data.explan = ELS_EXPL_INSUF_RES; | |
1618 | goto reject; | |
1619 | } | |
1620 | ||
1621 | mutex_lock(&rdata->rp_mutex); | |
1622 | mutex_unlock(&disc->disc_mutex); | |
1623 | ||
1624 | rdata->ids.port_name = get_unaligned_be64(&pl->fl_wwpn); | |
1625 | rdata->ids.node_name = get_unaligned_be64(&pl->fl_wwnn); | |
42e9a92f RL |
1626 | |
1627 | /* | |
3ac6f98f | 1628 | * If the rport was just created, possibly due to the incoming PLOGI, |
42e9a92f RL |
1629 | * set the state appropriately and accept the PLOGI. |
1630 | * | |
1631 | * If we had also sent a PLOGI, and if the received PLOGI is from a | |
1632 | * higher WWPN, we accept it, otherwise an LS_RJT is sent with reason | |
1633 | * "command already in progress". | |
1634 | * | |
1635 | * XXX TBD: If the session was ready before, the PLOGI should result in | |
1636 | * all outstanding exchanges being reset. | |
1637 | */ | |
1638 | switch (rdata->rp_state) { | |
1639 | case RPORT_ST_INIT: | |
3ac6f98f | 1640 | FC_RPORT_DBG(rdata, "Received PLOGI in INIT state\n"); |
42e9a92f | 1641 | break; |
a7b12a27 JE |
1642 | case RPORT_ST_PLOGI_WAIT: |
1643 | FC_RPORT_DBG(rdata, "Received PLOGI in PLOGI_WAIT state\n"); | |
1644 | break; | |
42e9a92f | 1645 | case RPORT_ST_PLOGI: |
3ac6f98f JE |
1646 | FC_RPORT_DBG(rdata, "Received PLOGI in PLOGI state\n"); |
1647 | if (rdata->ids.port_name < lport->wwpn) { | |
1648 | mutex_unlock(&rdata->rp_mutex); | |
1649 | rjt_data.reason = ELS_RJT_INPROG; | |
1650 | rjt_data.explan = ELS_EXPL_NONE; | |
1651 | goto reject; | |
1652 | } | |
42e9a92f RL |
1653 | break; |
1654 | case RPORT_ST_PRLI: | |
b4a9c7ed | 1655 | case RPORT_ST_RTV: |
42e9a92f | 1656 | case RPORT_ST_READY: |
370c3bd0 JE |
1657 | case RPORT_ST_ADISC: |
1658 | FC_RPORT_DBG(rdata, "Received PLOGI in logged-in state %d " | |
1659 | "- ignored for now\n", rdata->rp_state); | |
1660 | /* XXX TBD - should reset */ | |
42e9a92f | 1661 | break; |
a7b12a27 | 1662 | case RPORT_ST_FLOGI: |
14194054 | 1663 | case RPORT_ST_DELETE: |
b4a9c7ed JE |
1664 | FC_RPORT_DBG(rdata, "Received PLOGI in state %s - send busy\n", |
1665 | fc_rport_state(rdata)); | |
1666 | mutex_unlock(&rdata->rp_mutex); | |
1667 | rjt_data.reason = ELS_RJT_BUSY; | |
1668 | rjt_data.explan = ELS_EXPL_NONE; | |
1669 | goto reject; | |
42e9a92f | 1670 | } |
e0335f67 MR |
1671 | if (!fc_rport_compatible_roles(lport, rdata)) { |
1672 | FC_RPORT_DBG(rdata, "Received PLOGI for incompatible role\n"); | |
1673 | mutex_unlock(&rdata->rp_mutex); | |
1674 | rjt_data.reason = ELS_RJT_LOGIC; | |
1675 | rjt_data.explan = ELS_EXPL_NONE; | |
1676 | goto reject; | |
1677 | } | |
42e9a92f | 1678 | |
3ac6f98f JE |
1679 | /* |
1680 | * Get session payload size from incoming PLOGI. | |
1681 | */ | |
1682 | rdata->maxframe_size = fc_plogi_get_maxframe(pl, lport->mfs); | |
3ac6f98f JE |
1683 | |
1684 | /* | |
1685 | * Send LS_ACC. If this fails, the originator should retry. | |
1686 | */ | |
3ac6f98f JE |
1687 | fp = fc_frame_alloc(lport, sizeof(*pl)); |
1688 | if (!fp) | |
1689 | goto out; | |
1690 | ||
1691 | fc_plogi_fill(lport, fp, ELS_LS_ACC); | |
24f089e2 JE |
1692 | fc_fill_reply_hdr(fp, rx_fp, FC_RCTL_ELS_REP, 0); |
1693 | lport->tt.frame_send(lport, fp); | |
3ac6f98f JE |
1694 | fc_rport_enter_prli(rdata); |
1695 | out: | |
1696 | mutex_unlock(&rdata->rp_mutex); | |
24f089e2 | 1697 | fc_frame_free(rx_fp); |
3ac6f98f JE |
1698 | return; |
1699 | ||
1700 | reject: | |
92261156 | 1701 | lport->tt.seq_els_rsp_send(fp, ELS_LS_RJT, &rjt_data); |
3ac6f98f | 1702 | fc_frame_free(fp); |
42e9a92f RL |
1703 | } |
1704 | ||
1705 | /** | |
3a3b42bf RL |
1706 | * fc_rport_recv_prli_req() - Handler for process login (PRLI) requests |
1707 | * @rdata: The remote port that sent the PRLI request | |
3a3b42bf | 1708 | * @rx_fp: The PRLI request frame |
42e9a92f | 1709 | * |
c1d45424 | 1710 | * Locking Note: The rport lock is expected to be held before calling |
42e9a92f RL |
1711 | * this function. |
1712 | */ | |
9fb9d328 | 1713 | static void fc_rport_recv_prli_req(struct fc_rport_priv *rdata, |
92261156 | 1714 | struct fc_frame *rx_fp) |
42e9a92f | 1715 | { |
42e9a92f | 1716 | struct fc_lport *lport = rdata->local_port; |
42e9a92f | 1717 | struct fc_frame *fp; |
42e9a92f RL |
1718 | struct { |
1719 | struct fc_els_prli prli; | |
1720 | struct fc_els_spp spp; | |
1721 | } *pp; | |
1722 | struct fc_els_spp *rspp; /* request service param page */ | |
1723 | struct fc_els_spp *spp; /* response spp */ | |
1724 | unsigned int len; | |
1725 | unsigned int plen; | |
42e9a92f | 1726 | enum fc_els_spp_resp resp; |
96ad8464 | 1727 | enum fc_els_spp_resp passive; |
42e9a92f | 1728 | struct fc_seq_els_data rjt_data; |
96ad8464 | 1729 | struct fc4_prov *prov; |
42e9a92f | 1730 | |
9fb9d328 JE |
1731 | FC_RPORT_DBG(rdata, "Received PRLI request while in state %s\n", |
1732 | fc_rport_state(rdata)); | |
42e9a92f | 1733 | |
251748a9 | 1734 | len = fr_len(rx_fp) - sizeof(struct fc_frame_header); |
42e9a92f | 1735 | pp = fc_frame_payload_get(rx_fp, sizeof(*pp)); |
a2f6a024 JE |
1736 | if (!pp) |
1737 | goto reject_len; | |
1738 | plen = ntohs(pp->prli.prli_len); | |
1739 | if ((plen % 4) != 0 || plen > len || plen < 16) | |
1740 | goto reject_len; | |
1741 | if (plen < len) | |
1742 | len = plen; | |
1743 | plen = pp->prli.prli_spp_len; | |
1744 | if ((plen % 4) != 0 || plen < sizeof(*spp) || | |
1745 | plen > len || len < sizeof(*pp) || plen < 12) | |
1746 | goto reject_len; | |
1747 | rspp = &pp->spp; | |
1748 | ||
1749 | fp = fc_frame_alloc(lport, len); | |
1750 | if (!fp) { | |
1751 | rjt_data.reason = ELS_RJT_UNAB; | |
1752 | rjt_data.explan = ELS_EXPL_INSUF_RES; | |
1753 | goto reject; | |
42e9a92f | 1754 | } |
a2f6a024 JE |
1755 | pp = fc_frame_payload_get(fp, len); |
1756 | WARN_ON(!pp); | |
1757 | memset(pp, 0, len); | |
1758 | pp->prli.prli_cmd = ELS_LS_ACC; | |
1759 | pp->prli.prli_spp_len = plen; | |
1760 | pp->prli.prli_len = htons(len); | |
1761 | len -= sizeof(struct fc_els_prli); | |
42e9a92f | 1762 | |
a2f6a024 JE |
1763 | /* |
1764 | * Go through all the service parameter pages and build | |
1765 | * response. If plen indicates longer SPP than standard, | |
1766 | * use that. The entire response has been pre-cleared above. | |
1767 | */ | |
1768 | spp = &pp->spp; | |
96ad8464 | 1769 | mutex_lock(&fc_prov_mutex); |
a2f6a024 | 1770 | while (len >= plen) { |
75a2792d | 1771 | rdata->spp_type = rspp->spp_type; |
a2f6a024 JE |
1772 | spp->spp_type = rspp->spp_type; |
1773 | spp->spp_type_ext = rspp->spp_type_ext; | |
96ad8464 JE |
1774 | resp = 0; |
1775 | ||
1776 | if (rspp->spp_type < FC_FC4_PROV_SIZE) { | |
1777 | prov = fc_active_prov[rspp->spp_type]; | |
1778 | if (prov) | |
1779 | resp = prov->prli(rdata, plen, rspp, spp); | |
1780 | prov = fc_passive_prov[rspp->spp_type]; | |
1781 | if (prov) { | |
1782 | passive = prov->prli(rdata, plen, rspp, spp); | |
1783 | if (!resp || passive == FC_SPP_RESP_ACK) | |
1784 | resp = passive; | |
1785 | } | |
1786 | } | |
1787 | if (!resp) { | |
1788 | if (spp->spp_flags & FC_SPP_EST_IMG_PAIR) | |
1789 | resp |= FC_SPP_RESP_CONF; | |
1790 | else | |
1791 | resp |= FC_SPP_RESP_INVL; | |
42e9a92f | 1792 | } |
a2f6a024 JE |
1793 | spp->spp_flags |= resp; |
1794 | len -= plen; | |
1795 | rspp = (struct fc_els_spp *)((char *)rspp + plen); | |
1796 | spp = (struct fc_els_spp *)((char *)spp + plen); | |
1797 | } | |
96ad8464 | 1798 | mutex_unlock(&fc_prov_mutex); |
a2f6a024 JE |
1799 | |
1800 | /* | |
1801 | * Send LS_ACC. If this fails, the originator should retry. | |
1802 | */ | |
24f089e2 JE |
1803 | fc_fill_reply_hdr(fp, rx_fp, FC_RCTL_ELS_REP, 0); |
1804 | lport->tt.frame_send(lport, fp); | |
a2f6a024 JE |
1805 | |
1806 | switch (rdata->rp_state) { | |
1807 | case RPORT_ST_PRLI: | |
1808 | fc_rport_enter_ready(rdata); | |
1809 | break; | |
1810 | default: | |
1811 | break; | |
42e9a92f | 1812 | } |
a2f6a024 JE |
1813 | goto drop; |
1814 | ||
1815 | reject_len: | |
1816 | rjt_data.reason = ELS_RJT_PROT; | |
1817 | rjt_data.explan = ELS_EXPL_INV_LEN; | |
1818 | reject: | |
92261156 | 1819 | lport->tt.seq_els_rsp_send(rx_fp, ELS_LS_RJT, &rjt_data); |
a2f6a024 | 1820 | drop: |
42e9a92f RL |
1821 | fc_frame_free(rx_fp); |
1822 | } | |
1823 | ||
1824 | /** | |
3a3b42bf RL |
1825 | * fc_rport_recv_prlo_req() - Handler for process logout (PRLO) requests |
1826 | * @rdata: The remote port that sent the PRLO request | |
f8fc6c2c | 1827 | * @rx_fp: The PRLO request frame |
42e9a92f | 1828 | * |
c1d45424 | 1829 | * Locking Note: The rport lock is expected to be held before calling |
42e9a92f RL |
1830 | * this function. |
1831 | */ | |
9fb9d328 | 1832 | static void fc_rport_recv_prlo_req(struct fc_rport_priv *rdata, |
f8fc6c2c | 1833 | struct fc_frame *rx_fp) |
42e9a92f | 1834 | { |
42e9a92f | 1835 | struct fc_lport *lport = rdata->local_port; |
f8fc6c2c BPG |
1836 | struct fc_frame *fp; |
1837 | struct { | |
1838 | struct fc_els_prlo prlo; | |
1839 | struct fc_els_spp spp; | |
1840 | } *pp; | |
1841 | struct fc_els_spp *rspp; /* request service param page */ | |
1842 | struct fc_els_spp *spp; /* response spp */ | |
1843 | unsigned int len; | |
1844 | unsigned int plen; | |
42e9a92f RL |
1845 | struct fc_seq_els_data rjt_data; |
1846 | ||
9fb9d328 JE |
1847 | FC_RPORT_DBG(rdata, "Received PRLO request while in state %s\n", |
1848 | fc_rport_state(rdata)); | |
42e9a92f | 1849 | |
251748a9 | 1850 | len = fr_len(rx_fp) - sizeof(struct fc_frame_header); |
f8fc6c2c BPG |
1851 | pp = fc_frame_payload_get(rx_fp, sizeof(*pp)); |
1852 | if (!pp) | |
1853 | goto reject_len; | |
1854 | plen = ntohs(pp->prlo.prlo_len); | |
1855 | if (plen != 20) | |
1856 | goto reject_len; | |
1857 | if (plen < len) | |
1858 | len = plen; | |
1859 | ||
1860 | rspp = &pp->spp; | |
1861 | ||
1862 | fp = fc_frame_alloc(lport, len); | |
1863 | if (!fp) { | |
1864 | rjt_data.reason = ELS_RJT_UNAB; | |
1865 | rjt_data.explan = ELS_EXPL_INSUF_RES; | |
1866 | goto reject; | |
1867 | } | |
1868 | ||
f8fc6c2c BPG |
1869 | pp = fc_frame_payload_get(fp, len); |
1870 | WARN_ON(!pp); | |
1871 | memset(pp, 0, len); | |
1872 | pp->prlo.prlo_cmd = ELS_LS_ACC; | |
1873 | pp->prlo.prlo_obs = 0x10; | |
1874 | pp->prlo.prlo_len = htons(len); | |
1875 | spp = &pp->spp; | |
1876 | spp->spp_type = rspp->spp_type; | |
1877 | spp->spp_type_ext = rspp->spp_type_ext; | |
1878 | spp->spp_flags = FC_SPP_RESP_ACK; | |
1879 | ||
166f310b | 1880 | fc_rport_enter_prli(rdata); |
f8fc6c2c | 1881 | |
92261156 JE |
1882 | fc_fill_reply_hdr(fp, rx_fp, FC_RCTL_ELS_REP, 0); |
1883 | lport->tt.frame_send(lport, fp); | |
f8fc6c2c BPG |
1884 | goto drop; |
1885 | ||
1886 | reject_len: | |
1887 | rjt_data.reason = ELS_RJT_PROT; | |
1888 | rjt_data.explan = ELS_EXPL_INV_LEN; | |
1889 | reject: | |
92261156 | 1890 | lport->tt.seq_els_rsp_send(rx_fp, ELS_LS_RJT, &rjt_data); |
f8fc6c2c BPG |
1891 | drop: |
1892 | fc_frame_free(rx_fp); | |
42e9a92f RL |
1893 | } |
1894 | ||
1895 | /** | |
3a3b42bf RL |
1896 | * fc_rport_recv_logo_req() - Handler for logout (LOGO) requests |
1897 | * @lport: The local port that received the LOGO request | |
3a3b42bf | 1898 | * @fp: The LOGO request frame |
42e9a92f | 1899 | * |
c1d45424 | 1900 | * Locking Note: The rport lock is expected to be held before calling |
42e9a92f RL |
1901 | * this function. |
1902 | */ | |
92261156 | 1903 | static void fc_rport_recv_logo_req(struct fc_lport *lport, struct fc_frame *fp) |
42e9a92f | 1904 | { |
83fe6a93 JE |
1905 | struct fc_rport_priv *rdata; |
1906 | u32 sid; | |
42e9a92f | 1907 | |
92261156 | 1908 | lport->tt.seq_els_rsp_send(fp, ELS_LS_ACC, NULL); |
feab4ae7 | 1909 | |
251748a9 | 1910 | sid = fc_frame_sid(fp); |
42e9a92f | 1911 | |
83fe6a93 JE |
1912 | rdata = lport->tt.rport_lookup(lport, sid); |
1913 | if (rdata) { | |
1914 | mutex_lock(&rdata->rp_mutex); | |
1915 | FC_RPORT_DBG(rdata, "Received LOGO request while in state %s\n", | |
1916 | fc_rport_state(rdata)); | |
feab4ae7 | 1917 | |
b4a9c7ed | 1918 | fc_rport_enter_delete(rdata, RPORT_EV_LOGO); |
83fe6a93 | 1919 | mutex_unlock(&rdata->rp_mutex); |
baa6719f | 1920 | kref_put(&rdata->kref, rdata->local_port->tt.rport_destroy); |
83fe6a93 JE |
1921 | } else |
1922 | FC_RPORT_ID_DBG(lport, sid, | |
1923 | "Received LOGO from non-logged-in port\n"); | |
42e9a92f RL |
1924 | fc_frame_free(fp); |
1925 | } | |
1926 | ||
3a3b42bf RL |
1927 | /** |
1928 | * fc_rport_flush_queue() - Flush the rport_event_queue | |
1929 | */ | |
42e9a92f RL |
1930 | static void fc_rport_flush_queue(void) |
1931 | { | |
1932 | flush_workqueue(rport_event_queue); | |
1933 | } | |
1934 | ||
3a3b42bf RL |
1935 | /** |
1936 | * fc_rport_init() - Initialize the remote port layer for a local port | |
1937 | * @lport: The local port to initialize the remote port layer for | |
1938 | */ | |
42e9a92f RL |
1939 | int fc_rport_init(struct fc_lport *lport) |
1940 | { | |
8025b5db JE |
1941 | if (!lport->tt.rport_lookup) |
1942 | lport->tt.rport_lookup = fc_rport_lookup; | |
1943 | ||
5101ff99 | 1944 | if (!lport->tt.rport_create) |
9e9d0452 | 1945 | lport->tt.rport_create = fc_rport_create; |
5101ff99 | 1946 | |
42e9a92f RL |
1947 | if (!lport->tt.rport_login) |
1948 | lport->tt.rport_login = fc_rport_login; | |
1949 | ||
1950 | if (!lport->tt.rport_logoff) | |
1951 | lport->tt.rport_logoff = fc_rport_logoff; | |
1952 | ||
1953 | if (!lport->tt.rport_recv_req) | |
1954 | lport->tt.rport_recv_req = fc_rport_recv_req; | |
1955 | ||
1956 | if (!lport->tt.rport_flush_queue) | |
1957 | lport->tt.rport_flush_queue = fc_rport_flush_queue; | |
1958 | ||
f211fa51 JE |
1959 | if (!lport->tt.rport_destroy) |
1960 | lport->tt.rport_destroy = fc_rport_destroy; | |
1961 | ||
42e9a92f RL |
1962 | return 0; |
1963 | } | |
1964 | EXPORT_SYMBOL(fc_rport_init); | |
1965 | ||
96ad8464 JE |
1966 | /** |
1967 | * fc_rport_fcp_prli() - Handle incoming PRLI for the FCP initiator. | |
1968 | * @rdata: remote port private | |
1969 | * @spp_len: service parameter page length | |
1970 | * @rspp: received service parameter page | |
1971 | * @spp: response service parameter page | |
1972 | * | |
1973 | * Returns the value for the response code to be placed in spp_flags; | |
1974 | * Returns 0 if not an initiator. | |
1975 | */ | |
1976 | static int fc_rport_fcp_prli(struct fc_rport_priv *rdata, u32 spp_len, | |
1977 | const struct fc_els_spp *rspp, | |
1978 | struct fc_els_spp *spp) | |
1979 | { | |
1980 | struct fc_lport *lport = rdata->local_port; | |
1981 | u32 fcp_parm; | |
1982 | ||
1983 | fcp_parm = ntohl(rspp->spp_params); | |
1984 | rdata->ids.roles = FC_RPORT_ROLE_UNKNOWN; | |
1985 | if (fcp_parm & FCP_SPPF_INIT_FCN) | |
1986 | rdata->ids.roles |= FC_RPORT_ROLE_FCP_INITIATOR; | |
1987 | if (fcp_parm & FCP_SPPF_TARG_FCN) | |
1988 | rdata->ids.roles |= FC_RPORT_ROLE_FCP_TARGET; | |
1989 | if (fcp_parm & FCP_SPPF_RETRY) | |
1990 | rdata->flags |= FC_RP_FLAGS_RETRY; | |
1991 | rdata->supported_classes = FC_COS_CLASS3; | |
1992 | ||
732bdb9d | 1993 | if (!(lport->service_params & FCP_SPPF_INIT_FCN)) |
96ad8464 JE |
1994 | return 0; |
1995 | ||
1996 | spp->spp_flags |= rspp->spp_flags & FC_SPP_EST_IMG_PAIR; | |
1997 | ||
1998 | /* | |
1999 | * OR in our service parameters with other providers (target), if any. | |
2000 | */ | |
2001 | fcp_parm = ntohl(spp->spp_params); | |
2002 | spp->spp_params = htonl(fcp_parm | lport->service_params); | |
2003 | return FC_SPP_RESP_ACK; | |
2004 | } | |
2005 | ||
2006 | /* | |
2007 | * FC-4 provider ops for FCP initiator. | |
2008 | */ | |
2009 | struct fc4_prov fc_rport_fcp_init = { | |
2010 | .prli = fc_rport_fcp_prli, | |
2011 | }; | |
2012 | ||
2013 | /** | |
2014 | * fc_rport_t0_prli() - Handle incoming PRLI parameters for type 0 | |
2015 | * @rdata: remote port private | |
2016 | * @spp_len: service parameter page length | |
2017 | * @rspp: received service parameter page | |
2018 | * @spp: response service parameter page | |
2019 | */ | |
2020 | static int fc_rport_t0_prli(struct fc_rport_priv *rdata, u32 spp_len, | |
2021 | const struct fc_els_spp *rspp, | |
2022 | struct fc_els_spp *spp) | |
2023 | { | |
2024 | if (rspp->spp_flags & FC_SPP_EST_IMG_PAIR) | |
2025 | return FC_SPP_RESP_INVL; | |
2026 | return FC_SPP_RESP_ACK; | |
2027 | } | |
2028 | ||
2029 | /* | |
2030 | * FC-4 provider ops for type 0 service parameters. | |
2031 | * | |
2032 | * This handles the special case of type 0 which is always successful | |
2033 | * but doesn't do anything otherwise. | |
2034 | */ | |
2035 | struct fc4_prov fc_rport_t0_prov = { | |
2036 | .prli = fc_rport_t0_prli, | |
2037 | }; | |
2038 | ||
3a3b42bf RL |
2039 | /** |
2040 | * fc_setup_rport() - Initialize the rport_event_queue | |
2041 | */ | |
55204909 | 2042 | int fc_setup_rport(void) |
42e9a92f RL |
2043 | { |
2044 | rport_event_queue = create_singlethread_workqueue("fc_rport_eq"); | |
2045 | if (!rport_event_queue) | |
2046 | return -ENOMEM; | |
2047 | return 0; | |
2048 | } | |
42e9a92f | 2049 | |
3a3b42bf RL |
2050 | /** |
2051 | * fc_destroy_rport() - Destroy the rport_event_queue | |
2052 | */ | |
55204909 | 2053 | void fc_destroy_rport(void) |
42e9a92f RL |
2054 | { |
2055 | destroy_workqueue(rport_event_queue); | |
2056 | } | |
42e9a92f | 2057 | |
3a3b42bf RL |
2058 | /** |
2059 | * fc_rport_terminate_io() - Stop all outstanding I/O on a remote port | |
2060 | * @rport: The remote port whose I/O should be terminated | |
2061 | */ | |
42e9a92f RL |
2062 | void fc_rport_terminate_io(struct fc_rport *rport) |
2063 | { | |
3a3b42bf RL |
2064 | struct fc_rport_libfc_priv *rpriv = rport->dd_data; |
2065 | struct fc_lport *lport = rpriv->local_port; | |
42e9a92f | 2066 | |
1f6ff364 AJ |
2067 | lport->tt.exch_mgr_reset(lport, 0, rport->port_id); |
2068 | lport->tt.exch_mgr_reset(lport, rport->port_id, 0); | |
42e9a92f RL |
2069 | } |
2070 | EXPORT_SYMBOL(fc_rport_terminate_io); |