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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 JE |
97 | * |
98 | * The caller must hold either disc_mutex or rcu_read_lock(). | |
8025b5db JE |
99 | */ |
100 | static struct fc_rport_priv *fc_rport_lookup(const struct fc_lport *lport, | |
101 | u32 port_id) | |
102 | { | |
103 | struct fc_rport_priv *rdata; | |
104 | ||
42e90414 | 105 | list_for_each_entry_rcu(rdata, &lport->disc.rports, peers) |
b4a9c7ed | 106 | if (rdata->ids.port_id == port_id) |
8025b5db JE |
107 | return rdata; |
108 | return NULL; | |
109 | } | |
110 | ||
9e9d0452 | 111 | /** |
9737e6a7 | 112 | * fc_rport_create() - Create a new remote port |
3a3b42bf RL |
113 | * @lport: The local port this remote port will be associated with |
114 | * @ids: The identifiers for the new remote port | |
115 | * | |
116 | * The remote port will start in the INIT state. | |
9e9d0452 | 117 | * |
48f00902 | 118 | * Locking note: must be called with the disc_mutex held. |
9e9d0452 JE |
119 | */ |
120 | static struct fc_rport_priv *fc_rport_create(struct fc_lport *lport, | |
9737e6a7 | 121 | u32 port_id) |
42e9a92f | 122 | { |
ab28f1fd | 123 | struct fc_rport_priv *rdata; |
42e9a92f | 124 | |
9737e6a7 | 125 | rdata = lport->tt.rport_lookup(lport, port_id); |
19f97e3c JE |
126 | if (rdata) |
127 | return rdata; | |
128 | ||
f90377ab | 129 | rdata = kzalloc(sizeof(*rdata) + lport->rport_priv_size, GFP_KERNEL); |
9e9d0452 | 130 | if (!rdata) |
42e9a92f RL |
131 | return NULL; |
132 | ||
9737e6a7 RL |
133 | rdata->ids.node_name = -1; |
134 | rdata->ids.port_name = -1; | |
135 | rdata->ids.port_id = port_id; | |
136 | rdata->ids.roles = FC_RPORT_ROLE_UNKNOWN; | |
137 | ||
f211fa51 | 138 | kref_init(&rdata->kref); |
42e9a92f | 139 | mutex_init(&rdata->rp_mutex); |
795d86f5 | 140 | rdata->local_port = lport; |
42e9a92f RL |
141 | rdata->rp_state = RPORT_ST_INIT; |
142 | rdata->event = RPORT_EV_NONE; | |
143 | rdata->flags = FC_RP_FLAGS_REC_SUPPORTED; | |
795d86f5 JE |
144 | rdata->e_d_tov = lport->e_d_tov; |
145 | rdata->r_a_tov = lport->r_a_tov; | |
f211fa51 | 146 | rdata->maxframe_size = FC_MIN_MAX_PAYLOAD; |
42e9a92f RL |
147 | INIT_DELAYED_WORK(&rdata->retry_work, fc_rport_timeout); |
148 | INIT_WORK(&rdata->event_work, fc_rport_work); | |
75a2792d BPG |
149 | if (port_id != FC_FID_DIR_SERV) { |
150 | rdata->lld_event_callback = lport->tt.rport_event_callback; | |
42e90414 | 151 | list_add_rcu(&rdata->peers, &lport->disc.rports); |
75a2792d | 152 | } |
9fb9d328 | 153 | return rdata; |
42e9a92f RL |
154 | } |
155 | ||
f211fa51 | 156 | /** |
3a3b42bf RL |
157 | * fc_rport_destroy() - Free a remote port after last reference is released |
158 | * @kref: The remote port's kref | |
f211fa51 JE |
159 | */ |
160 | static void fc_rport_destroy(struct kref *kref) | |
161 | { | |
162 | struct fc_rport_priv *rdata; | |
f211fa51 JE |
163 | |
164 | rdata = container_of(kref, struct fc_rport_priv, kref); | |
8497a24a | 165 | kfree_rcu(rdata, rcu); |
f211fa51 JE |
166 | } |
167 | ||
42e9a92f | 168 | /** |
3a3b42bf RL |
169 | * fc_rport_state() - Return a string identifying the remote port's state |
170 | * @rdata: The remote port | |
42e9a92f | 171 | */ |
9fb9d328 | 172 | static const char *fc_rport_state(struct fc_rport_priv *rdata) |
42e9a92f RL |
173 | { |
174 | const char *cp; | |
42e9a92f RL |
175 | |
176 | cp = fc_rport_state_names[rdata->rp_state]; | |
177 | if (!cp) | |
178 | cp = "Unknown"; | |
179 | return cp; | |
180 | } | |
181 | ||
182 | /** | |
3a3b42bf RL |
183 | * fc_set_rport_loss_tmo() - Set the remote port loss timeout |
184 | * @rport: The remote port that gets a new timeout value | |
185 | * @timeout: The new timeout value (in seconds) | |
42e9a92f RL |
186 | */ |
187 | void fc_set_rport_loss_tmo(struct fc_rport *rport, u32 timeout) | |
188 | { | |
189 | if (timeout) | |
73b43764 | 190 | rport->dev_loss_tmo = timeout; |
42e9a92f | 191 | else |
73b43764 | 192 | rport->dev_loss_tmo = 1; |
42e9a92f RL |
193 | } |
194 | EXPORT_SYMBOL(fc_set_rport_loss_tmo); | |
195 | ||
196 | /** | |
3a3b42bf RL |
197 | * fc_plogi_get_maxframe() - Get the maximum payload from the common service |
198 | * parameters in a FLOGI frame | |
a7b12a27 | 199 | * @flp: The FLOGI or PLOGI payload |
3a3b42bf RL |
200 | * @maxval: The maximum frame size upper limit; this may be less than what |
201 | * is in the service parameters | |
42e9a92f | 202 | */ |
b2ab99c9 RL |
203 | static unsigned int fc_plogi_get_maxframe(struct fc_els_flogi *flp, |
204 | unsigned int maxval) | |
42e9a92f RL |
205 | { |
206 | unsigned int mfs; | |
207 | ||
208 | /* | |
209 | * Get max payload from the common service parameters and the | |
210 | * class 3 receive data field size. | |
211 | */ | |
212 | mfs = ntohs(flp->fl_csp.sp_bb_data) & FC_SP_BB_DATA_MASK; | |
213 | if (mfs >= FC_SP_MIN_MAX_PAYLOAD && mfs < maxval) | |
214 | maxval = mfs; | |
215 | mfs = ntohs(flp->fl_cssp[3 - 1].cp_rdfs); | |
216 | if (mfs >= FC_SP_MIN_MAX_PAYLOAD && mfs < maxval) | |
217 | maxval = mfs; | |
218 | return maxval; | |
219 | } | |
220 | ||
221 | /** | |
3a3b42bf RL |
222 | * fc_rport_state_enter() - Change the state of a remote port |
223 | * @rdata: The remote port whose state should change | |
224 | * @new: The new state | |
42e9a92f RL |
225 | * |
226 | * Locking Note: Called with the rport lock held | |
227 | */ | |
9fb9d328 | 228 | static void fc_rport_state_enter(struct fc_rport_priv *rdata, |
42e9a92f RL |
229 | enum fc_rport_state new) |
230 | { | |
42e9a92f RL |
231 | if (rdata->rp_state != new) |
232 | rdata->retries = 0; | |
233 | rdata->rp_state = new; | |
234 | } | |
235 | ||
3a3b42bf RL |
236 | /** |
237 | * fc_rport_work() - Handler for remote port events in the rport_event_queue | |
238 | * @work: Handle to the remote port being dequeued | |
239 | */ | |
42e9a92f RL |
240 | static void fc_rport_work(struct work_struct *work) |
241 | { | |
571f824c | 242 | u32 port_id; |
ab28f1fd JE |
243 | struct fc_rport_priv *rdata = |
244 | container_of(work, struct fc_rport_priv, event_work); | |
3a3b42bf | 245 | struct fc_rport_libfc_priv *rpriv; |
42e9a92f | 246 | enum fc_rport_event event; |
42e9a92f RL |
247 | struct fc_lport *lport = rdata->local_port; |
248 | struct fc_rport_operations *rport_ops; | |
629f4427 | 249 | struct fc_rport_identifiers ids; |
f211fa51 | 250 | struct fc_rport *rport; |
96ad8464 JE |
251 | struct fc4_prov *prov; |
252 | u8 type; | |
42e9a92f RL |
253 | |
254 | mutex_lock(&rdata->rp_mutex); | |
255 | event = rdata->event; | |
256 | rport_ops = rdata->ops; | |
f211fa51 | 257 | rport = rdata->rport; |
42e9a92f | 258 | |
9e9d0452 JE |
259 | FC_RPORT_DBG(rdata, "work event %u\n", event); |
260 | ||
629f4427 | 261 | switch (event) { |
4c0f62b5 | 262 | case RPORT_EV_READY: |
f211fa51 | 263 | ids = rdata->ids; |
5f7ea3b7 | 264 | rdata->event = RPORT_EV_NONE; |
f034260d | 265 | rdata->major_retries = 0; |
9e9d0452 | 266 | kref_get(&rdata->kref); |
42e9a92f RL |
267 | mutex_unlock(&rdata->rp_mutex); |
268 | ||
9e9d0452 JE |
269 | if (!rport) |
270 | rport = fc_remote_port_add(lport->host, 0, &ids); | |
271 | if (!rport) { | |
272 | FC_RPORT_DBG(rdata, "Failed to add the rport\n"); | |
273 | lport->tt.rport_logoff(rdata); | |
274 | kref_put(&rdata->kref, lport->tt.rport_destroy); | |
275 | return; | |
42e9a92f | 276 | } |
9e9d0452 JE |
277 | mutex_lock(&rdata->rp_mutex); |
278 | if (rdata->rport) | |
279 | FC_RPORT_DBG(rdata, "rport already allocated\n"); | |
280 | rdata->rport = rport; | |
281 | rport->maxframe_size = rdata->maxframe_size; | |
282 | rport->supported_classes = rdata->supported_classes; | |
283 | ||
3a3b42bf RL |
284 | rpriv = rport->dd_data; |
285 | rpriv->local_port = lport; | |
286 | rpriv->rp_state = rdata->rp_state; | |
287 | rpriv->flags = rdata->flags; | |
288 | rpriv->e_d_tov = rdata->e_d_tov; | |
289 | rpriv->r_a_tov = rdata->r_a_tov; | |
9e9d0452 JE |
290 | mutex_unlock(&rdata->rp_mutex); |
291 | ||
8345592b | 292 | if (rport_ops && rport_ops->event_callback) { |
9e9d0452 | 293 | FC_RPORT_DBG(rdata, "callback ev %d\n", event); |
9fb9d328 | 294 | rport_ops->event_callback(lport, rdata, event); |
9e9d0452 | 295 | } |
75a2792d BPG |
296 | if (rdata->lld_event_callback) { |
297 | FC_RPORT_DBG(rdata, "lld callback ev %d\n", event); | |
298 | rdata->lld_event_callback(lport, rdata, event); | |
299 | } | |
9e9d0452 | 300 | kref_put(&rdata->kref, lport->tt.rport_destroy); |
629f4427 JE |
301 | break; |
302 | ||
303 | case RPORT_EV_FAILED: | |
304 | case RPORT_EV_LOGO: | |
305 | case RPORT_EV_STOP: | |
96ad8464 JE |
306 | if (rdata->prli_count) { |
307 | mutex_lock(&fc_prov_mutex); | |
308 | for (type = 1; type < FC_FC4_PROV_SIZE; type++) { | |
309 | prov = fc_passive_prov[type]; | |
310 | if (prov && prov->prlo) | |
311 | prov->prlo(rdata); | |
312 | } | |
313 | mutex_unlock(&fc_prov_mutex); | |
314 | } | |
9e9d0452 | 315 | port_id = rdata->ids.port_id; |
42e9a92f | 316 | mutex_unlock(&rdata->rp_mutex); |
9e9d0452 | 317 | |
8345592b | 318 | if (rport_ops && rport_ops->event_callback) { |
9e9d0452 | 319 | FC_RPORT_DBG(rdata, "callback ev %d\n", event); |
9fb9d328 | 320 | rport_ops->event_callback(lport, rdata, event); |
9e9d0452 | 321 | } |
75a2792d BPG |
322 | if (rdata->lld_event_callback) { |
323 | FC_RPORT_DBG(rdata, "lld callback ev %d\n", event); | |
324 | rdata->lld_event_callback(lport, rdata, event); | |
325 | } | |
201e5795 | 326 | cancel_delayed_work_sync(&rdata->retry_work); |
9e9d0452 JE |
327 | |
328 | /* | |
329 | * Reset any outstanding exchanges before freeing rport. | |
330 | */ | |
331 | lport->tt.exch_mgr_reset(lport, 0, port_id); | |
332 | lport->tt.exch_mgr_reset(lport, port_id, 0); | |
333 | ||
334 | if (rport) { | |
3a3b42bf RL |
335 | rpriv = rport->dd_data; |
336 | rpriv->rp_state = RPORT_ST_DELETE; | |
9e9d0452 JE |
337 | mutex_lock(&rdata->rp_mutex); |
338 | rdata->rport = NULL; | |
339 | mutex_unlock(&rdata->rp_mutex); | |
42e9a92f | 340 | fc_remote_port_delete(rport); |
571f824c | 341 | } |
4b2164d4 JE |
342 | |
343 | mutex_lock(&lport->disc.disc_mutex); | |
344 | mutex_lock(&rdata->rp_mutex); | |
345 | if (rdata->rp_state == RPORT_ST_DELETE) { | |
346 | if (port_id == FC_FID_DIR_SERV) { | |
347 | rdata->event = RPORT_EV_NONE; | |
348 | mutex_unlock(&rdata->rp_mutex); | |
fe5e3f1a | 349 | kref_put(&rdata->kref, lport->tt.rport_destroy); |
f034260d JE |
350 | } else if ((rdata->flags & FC_RP_STARTED) && |
351 | rdata->major_retries < | |
352 | lport->max_rport_retry_count) { | |
353 | rdata->major_retries++; | |
4b2164d4 JE |
354 | rdata->event = RPORT_EV_NONE; |
355 | FC_RPORT_DBG(rdata, "work restart\n"); | |
a7b12a27 | 356 | fc_rport_enter_flogi(rdata); |
4b2164d4 JE |
357 | mutex_unlock(&rdata->rp_mutex); |
358 | } else { | |
359 | FC_RPORT_DBG(rdata, "work delete\n"); | |
42e90414 | 360 | list_del_rcu(&rdata->peers); |
4b2164d4 JE |
361 | mutex_unlock(&rdata->rp_mutex); |
362 | kref_put(&rdata->kref, lport->tt.rport_destroy); | |
363 | } | |
364 | } else { | |
365 | /* | |
366 | * Re-open for events. Reissue READY event if ready. | |
367 | */ | |
368 | rdata->event = RPORT_EV_NONE; | |
369 | if (rdata->rp_state == RPORT_ST_READY) | |
370 | fc_rport_enter_ready(rdata); | |
b4a9c7ed | 371 | mutex_unlock(&rdata->rp_mutex); |
4b2164d4 JE |
372 | } |
373 | mutex_unlock(&lport->disc.disc_mutex); | |
629f4427 JE |
374 | break; |
375 | ||
376 | default: | |
42e9a92f | 377 | mutex_unlock(&rdata->rp_mutex); |
629f4427 JE |
378 | break; |
379 | } | |
42e9a92f RL |
380 | } |
381 | ||
382 | /** | |
34f42a07 | 383 | * fc_rport_login() - Start the remote port login state machine |
3a3b42bf | 384 | * @rdata: The remote port to be logged in to |
42e9a92f RL |
385 | * |
386 | * Locking Note: Called without the rport lock held. This | |
387 | * function will hold the rport lock, call an _enter_* | |
388 | * function and then unlock the rport. | |
370c3bd0 JE |
389 | * |
390 | * This indicates the intent to be logged into the remote port. | |
391 | * If it appears we are already logged in, ADISC is used to verify | |
392 | * the setup. | |
42e9a92f | 393 | */ |
c6b21c93 | 394 | static int fc_rport_login(struct fc_rport_priv *rdata) |
42e9a92f | 395 | { |
42e9a92f RL |
396 | mutex_lock(&rdata->rp_mutex); |
397 | ||
4b2164d4 | 398 | rdata->flags |= FC_RP_STARTED; |
370c3bd0 JE |
399 | switch (rdata->rp_state) { |
400 | case RPORT_ST_READY: | |
401 | FC_RPORT_DBG(rdata, "ADISC port\n"); | |
402 | fc_rport_enter_adisc(rdata); | |
403 | break; | |
b4a9c7ed JE |
404 | case RPORT_ST_DELETE: |
405 | FC_RPORT_DBG(rdata, "Restart deleted port\n"); | |
b4a9c7ed | 406 | break; |
370c3bd0 JE |
407 | default: |
408 | FC_RPORT_DBG(rdata, "Login to port\n"); | |
a7b12a27 | 409 | fc_rport_enter_flogi(rdata); |
370c3bd0 JE |
410 | break; |
411 | } | |
42e9a92f RL |
412 | mutex_unlock(&rdata->rp_mutex); |
413 | ||
414 | return 0; | |
415 | } | |
416 | ||
5f7ea3b7 | 417 | /** |
3a3b42bf RL |
418 | * fc_rport_enter_delete() - Schedule a remote port to be deleted |
419 | * @rdata: The remote port to be deleted | |
420 | * @event: The event to report as the reason for deletion | |
5f7ea3b7 JE |
421 | * |
422 | * Locking Note: Called with the rport lock held. | |
423 | * | |
424 | * Allow state change into DELETE only once. | |
425 | * | |
426 | * Call queue_work only if there's no event already pending. | |
427 | * Set the new event so that the old pending event will not occur. | |
428 | * Since we have the mutex, even if fc_rport_work() is already started, | |
429 | * it'll see the new event. | |
430 | */ | |
9fb9d328 | 431 | static void fc_rport_enter_delete(struct fc_rport_priv *rdata, |
5f7ea3b7 JE |
432 | enum fc_rport_event event) |
433 | { | |
5f7ea3b7 JE |
434 | if (rdata->rp_state == RPORT_ST_DELETE) |
435 | return; | |
436 | ||
9fb9d328 | 437 | FC_RPORT_DBG(rdata, "Delete port\n"); |
5f7ea3b7 | 438 | |
9fb9d328 | 439 | fc_rport_state_enter(rdata, RPORT_ST_DELETE); |
5f7ea3b7 JE |
440 | |
441 | if (rdata->event == RPORT_EV_NONE) | |
442 | queue_work(rport_event_queue, &rdata->event_work); | |
443 | rdata->event = event; | |
444 | } | |
445 | ||
42e9a92f | 446 | /** |
3a3b42bf RL |
447 | * fc_rport_logoff() - Logoff and remove a remote port |
448 | * @rdata: The remote port to be logged off of | |
42e9a92f RL |
449 | * |
450 | * Locking Note: Called without the rport lock held. This | |
451 | * function will hold the rport lock, call an _enter_* | |
452 | * function and then unlock the rport. | |
453 | */ | |
c6b21c93 | 454 | static int fc_rport_logoff(struct fc_rport_priv *rdata) |
42e9a92f | 455 | { |
42e9a92f RL |
456 | mutex_lock(&rdata->rp_mutex); |
457 | ||
9fb9d328 | 458 | FC_RPORT_DBG(rdata, "Remove port\n"); |
42e9a92f | 459 | |
4b2164d4 | 460 | rdata->flags &= ~FC_RP_STARTED; |
14194054 | 461 | if (rdata->rp_state == RPORT_ST_DELETE) { |
9fb9d328 | 462 | FC_RPORT_DBG(rdata, "Port in Delete state, not removing\n"); |
b4c6f546 AJ |
463 | goto out; |
464 | } | |
4b2164d4 | 465 | fc_rport_enter_logo(rdata); |
42e9a92f RL |
466 | |
467 | /* | |
14194054 | 468 | * Change the state to Delete so that we discard |
42e9a92f RL |
469 | * the response. |
470 | */ | |
9fb9d328 | 471 | fc_rport_enter_delete(rdata, RPORT_EV_STOP); |
b4c6f546 | 472 | out: |
b4a9c7ed | 473 | mutex_unlock(&rdata->rp_mutex); |
42e9a92f RL |
474 | return 0; |
475 | } | |
476 | ||
477 | /** | |
3a3b42bf RL |
478 | * fc_rport_enter_ready() - Transition to the RPORT_ST_READY state |
479 | * @rdata: The remote port that is ready | |
42e9a92f RL |
480 | * |
481 | * Locking Note: The rport lock is expected to be held before calling | |
482 | * this routine. | |
483 | */ | |
9fb9d328 | 484 | static void fc_rport_enter_ready(struct fc_rport_priv *rdata) |
42e9a92f | 485 | { |
9fb9d328 | 486 | fc_rport_state_enter(rdata, RPORT_ST_READY); |
42e9a92f | 487 | |
9fb9d328 | 488 | FC_RPORT_DBG(rdata, "Port is Ready\n"); |
42e9a92f | 489 | |
5f7ea3b7 JE |
490 | if (rdata->event == RPORT_EV_NONE) |
491 | queue_work(rport_event_queue, &rdata->event_work); | |
4c0f62b5 | 492 | rdata->event = RPORT_EV_READY; |
42e9a92f RL |
493 | } |
494 | ||
495 | /** | |
3a3b42bf RL |
496 | * fc_rport_timeout() - Handler for the retry_work timer |
497 | * @work: Handle to the remote port that has timed out | |
42e9a92f RL |
498 | * |
499 | * Locking Note: Called without the rport lock held. This | |
500 | * function will hold the rport lock, call an _enter_* | |
501 | * function and then unlock the rport. | |
502 | */ | |
503 | static void fc_rport_timeout(struct work_struct *work) | |
504 | { | |
ab28f1fd JE |
505 | struct fc_rport_priv *rdata = |
506 | container_of(work, struct fc_rport_priv, retry_work.work); | |
42e9a92f RL |
507 | |
508 | mutex_lock(&rdata->rp_mutex); | |
509 | ||
510 | switch (rdata->rp_state) { | |
a7b12a27 JE |
511 | case RPORT_ST_FLOGI: |
512 | fc_rport_enter_flogi(rdata); | |
513 | break; | |
42e9a92f | 514 | case RPORT_ST_PLOGI: |
9fb9d328 | 515 | fc_rport_enter_plogi(rdata); |
42e9a92f RL |
516 | break; |
517 | case RPORT_ST_PRLI: | |
9fb9d328 | 518 | fc_rport_enter_prli(rdata); |
42e9a92f RL |
519 | break; |
520 | case RPORT_ST_RTV: | |
9fb9d328 | 521 | fc_rport_enter_rtv(rdata); |
42e9a92f | 522 | break; |
370c3bd0 JE |
523 | case RPORT_ST_ADISC: |
524 | fc_rport_enter_adisc(rdata); | |
525 | break; | |
a7b12a27 | 526 | case RPORT_ST_PLOGI_WAIT: |
42e9a92f RL |
527 | case RPORT_ST_READY: |
528 | case RPORT_ST_INIT: | |
14194054 | 529 | case RPORT_ST_DELETE: |
42e9a92f RL |
530 | break; |
531 | } | |
532 | ||
533 | mutex_unlock(&rdata->rp_mutex); | |
42e9a92f RL |
534 | } |
535 | ||
536 | /** | |
34f42a07 | 537 | * fc_rport_error() - Error handler, called once retries have been exhausted |
3a3b42bf RL |
538 | * @rdata: The remote port the error is happened on |
539 | * @fp: The error code encapsulated in a frame pointer | |
42e9a92f | 540 | * |
42e9a92f RL |
541 | * Locking Note: The rport lock is expected to be held before |
542 | * calling this routine | |
543 | */ | |
9fb9d328 | 544 | static void fc_rport_error(struct fc_rport_priv *rdata, struct fc_frame *fp) |
42e9a92f | 545 | { |
9fb9d328 | 546 | FC_RPORT_DBG(rdata, "Error %ld in state %s, retries %d\n", |
cdbe6dfe JE |
547 | IS_ERR(fp) ? -PTR_ERR(fp) : 0, |
548 | fc_rport_state(rdata), rdata->retries); | |
42e9a92f | 549 | |
6755db1c | 550 | switch (rdata->rp_state) { |
a7b12a27 | 551 | case RPORT_ST_FLOGI: |
6755db1c | 552 | case RPORT_ST_PLOGI: |
4b2164d4 | 553 | rdata->flags &= ~FC_RP_STARTED; |
9fb9d328 | 554 | fc_rport_enter_delete(rdata, RPORT_EV_FAILED); |
6755db1c CL |
555 | break; |
556 | case RPORT_ST_RTV: | |
9fb9d328 | 557 | fc_rport_enter_ready(rdata); |
6755db1c | 558 | break; |
370c3bd0 JE |
559 | case RPORT_ST_PRLI: |
560 | case RPORT_ST_ADISC: | |
561 | fc_rport_enter_logo(rdata); | |
562 | break; | |
a7b12a27 | 563 | case RPORT_ST_PLOGI_WAIT: |
14194054 | 564 | case RPORT_ST_DELETE: |
6755db1c CL |
565 | case RPORT_ST_READY: |
566 | case RPORT_ST_INIT: | |
567 | break; | |
42e9a92f RL |
568 | } |
569 | } | |
570 | ||
6755db1c | 571 | /** |
3a3b42bf RL |
572 | * fc_rport_error_retry() - Handler for remote port state retries |
573 | * @rdata: The remote port whose state is to be retried | |
574 | * @fp: The error code encapsulated in a frame pointer | |
6755db1c CL |
575 | * |
576 | * If the error was an exchange timeout retry immediately, | |
577 | * otherwise wait for E_D_TOV. | |
578 | * | |
579 | * Locking Note: The rport lock is expected to be held before | |
580 | * calling this routine | |
581 | */ | |
9fb9d328 JE |
582 | static void fc_rport_error_retry(struct fc_rport_priv *rdata, |
583 | struct fc_frame *fp) | |
6755db1c | 584 | { |
a586069b | 585 | unsigned long delay = msecs_to_jiffies(FC_DEF_E_D_TOV); |
6755db1c CL |
586 | |
587 | /* make sure this isn't an FC_EX_CLOSED error, never retry those */ | |
588 | if (PTR_ERR(fp) == -FC_EX_CLOSED) | |
28a4af1e | 589 | goto out; |
6755db1c | 590 | |
a3666955 | 591 | if (rdata->retries < rdata->local_port->max_rport_retry_count) { |
9fb9d328 JE |
592 | FC_RPORT_DBG(rdata, "Error %ld in state %s, retrying\n", |
593 | PTR_ERR(fp), fc_rport_state(rdata)); | |
6755db1c CL |
594 | rdata->retries++; |
595 | /* no additional delay on exchange timeouts */ | |
596 | if (PTR_ERR(fp) == -FC_EX_TIMEOUT) | |
597 | delay = 0; | |
6755db1c CL |
598 | schedule_delayed_work(&rdata->retry_work, delay); |
599 | return; | |
600 | } | |
601 | ||
28a4af1e HD |
602 | out: |
603 | fc_rport_error(rdata, fp); | |
6755db1c CL |
604 | } |
605 | ||
42e9a92f | 606 | /** |
a7b12a27 JE |
607 | * fc_rport_login_complete() - Handle parameters and completion of p-mp login. |
608 | * @rdata: The remote port which we logged into or which logged into us. | |
609 | * @fp: The FLOGI or PLOGI request or response frame | |
610 | * | |
611 | * Returns non-zero error if a problem is detected with the frame. | |
612 | * Does not free the frame. | |
613 | * | |
614 | * This is only used in point-to-multipoint mode for FIP currently. | |
615 | */ | |
616 | static int fc_rport_login_complete(struct fc_rport_priv *rdata, | |
617 | struct fc_frame *fp) | |
618 | { | |
619 | struct fc_lport *lport = rdata->local_port; | |
620 | struct fc_els_flogi *flogi; | |
621 | unsigned int e_d_tov; | |
622 | u16 csp_flags; | |
623 | ||
624 | flogi = fc_frame_payload_get(fp, sizeof(*flogi)); | |
625 | if (!flogi) | |
626 | return -EINVAL; | |
627 | ||
628 | csp_flags = ntohs(flogi->fl_csp.sp_features); | |
629 | ||
630 | if (fc_frame_payload_op(fp) == ELS_FLOGI) { | |
631 | if (csp_flags & FC_SP_FT_FPORT) { | |
632 | FC_RPORT_DBG(rdata, "Fabric bit set in FLOGI\n"); | |
633 | return -EINVAL; | |
634 | } | |
635 | } else { | |
636 | ||
637 | /* | |
638 | * E_D_TOV is not valid on an incoming FLOGI request. | |
639 | */ | |
640 | e_d_tov = ntohl(flogi->fl_csp.sp_e_d_tov); | |
641 | if (csp_flags & FC_SP_FT_EDTR) | |
642 | e_d_tov /= 1000000; | |
643 | if (e_d_tov > rdata->e_d_tov) | |
644 | rdata->e_d_tov = e_d_tov; | |
645 | } | |
646 | rdata->maxframe_size = fc_plogi_get_maxframe(flogi, lport->mfs); | |
647 | return 0; | |
648 | } | |
649 | ||
650 | /** | |
651 | * fc_rport_flogi_resp() - Handle response to FLOGI request for p-mp mode | |
652 | * @sp: The sequence that the FLOGI was on | |
653 | * @fp: The FLOGI response frame | |
654 | * @rp_arg: The remote port that received the FLOGI response | |
655 | */ | |
c6b21c93 BVA |
656 | static void fc_rport_flogi_resp(struct fc_seq *sp, struct fc_frame *fp, |
657 | void *rp_arg) | |
a7b12a27 JE |
658 | { |
659 | struct fc_rport_priv *rdata = rp_arg; | |
660 | struct fc_lport *lport = rdata->local_port; | |
661 | struct fc_els_flogi *flogi; | |
662 | unsigned int r_a_tov; | |
663 | ||
664 | FC_RPORT_DBG(rdata, "Received a FLOGI %s\n", fc_els_resp_type(fp)); | |
665 | ||
666 | if (fp == ERR_PTR(-FC_EX_CLOSED)) | |
0e9e3d3b | 667 | goto put; |
a7b12a27 JE |
668 | |
669 | mutex_lock(&rdata->rp_mutex); | |
670 | ||
671 | if (rdata->rp_state != RPORT_ST_FLOGI) { | |
672 | FC_RPORT_DBG(rdata, "Received a FLOGI response, but in state " | |
673 | "%s\n", fc_rport_state(rdata)); | |
674 | if (IS_ERR(fp)) | |
675 | goto err; | |
676 | goto out; | |
677 | } | |
678 | ||
679 | if (IS_ERR(fp)) { | |
680 | fc_rport_error(rdata, fp); | |
681 | goto err; | |
682 | } | |
683 | ||
684 | if (fc_frame_payload_op(fp) != ELS_LS_ACC) | |
685 | goto bad; | |
686 | if (fc_rport_login_complete(rdata, fp)) | |
687 | goto bad; | |
688 | ||
689 | flogi = fc_frame_payload_get(fp, sizeof(*flogi)); | |
690 | if (!flogi) | |
691 | goto bad; | |
692 | r_a_tov = ntohl(flogi->fl_csp.sp_r_a_tov); | |
693 | if (r_a_tov > rdata->r_a_tov) | |
694 | rdata->r_a_tov = r_a_tov; | |
695 | ||
696 | if (rdata->ids.port_name < lport->wwpn) | |
697 | fc_rport_enter_plogi(rdata); | |
698 | else | |
699 | fc_rport_state_enter(rdata, RPORT_ST_PLOGI_WAIT); | |
700 | out: | |
701 | fc_frame_free(fp); | |
702 | err: | |
703 | mutex_unlock(&rdata->rp_mutex); | |
0e9e3d3b | 704 | put: |
a7b12a27 JE |
705 | kref_put(&rdata->kref, rdata->local_port->tt.rport_destroy); |
706 | return; | |
707 | bad: | |
708 | FC_RPORT_DBG(rdata, "Bad FLOGI response\n"); | |
709 | fc_rport_error_retry(rdata, fp); | |
710 | goto out; | |
711 | } | |
712 | ||
713 | /** | |
714 | * fc_rport_enter_flogi() - Send a FLOGI request to the remote port for p-mp | |
715 | * @rdata: The remote port to send a FLOGI to | |
716 | * | |
717 | * Locking Note: The rport lock is expected to be held before calling | |
718 | * this routine. | |
719 | */ | |
720 | static void fc_rport_enter_flogi(struct fc_rport_priv *rdata) | |
721 | { | |
722 | struct fc_lport *lport = rdata->local_port; | |
723 | struct fc_frame *fp; | |
724 | ||
725 | if (!lport->point_to_multipoint) | |
726 | return fc_rport_enter_plogi(rdata); | |
727 | ||
728 | FC_RPORT_DBG(rdata, "Entered FLOGI state from %s state\n", | |
729 | fc_rport_state(rdata)); | |
730 | ||
731 | fc_rport_state_enter(rdata, RPORT_ST_FLOGI); | |
732 | ||
733 | fp = fc_frame_alloc(lport, sizeof(struct fc_els_flogi)); | |
734 | if (!fp) | |
735 | return fc_rport_error_retry(rdata, fp); | |
736 | ||
737 | if (!lport->tt.elsct_send(lport, rdata->ids.port_id, fp, ELS_FLOGI, | |
738 | fc_rport_flogi_resp, rdata, | |
739 | 2 * lport->r_a_tov)) | |
740 | fc_rport_error_retry(rdata, NULL); | |
741 | else | |
742 | kref_get(&rdata->kref); | |
743 | } | |
744 | ||
745 | /** | |
746 | * fc_rport_recv_flogi_req() - Handle Fabric Login (FLOGI) request in p-mp mode | |
747 | * @lport: The local port that received the PLOGI request | |
a7b12a27 JE |
748 | * @rx_fp: The PLOGI request frame |
749 | */ | |
750 | static void fc_rport_recv_flogi_req(struct fc_lport *lport, | |
92261156 | 751 | struct fc_frame *rx_fp) |
a7b12a27 JE |
752 | { |
753 | struct fc_disc *disc; | |
754 | struct fc_els_flogi *flp; | |
755 | struct fc_rport_priv *rdata; | |
756 | struct fc_frame *fp = rx_fp; | |
a7b12a27 | 757 | struct fc_seq_els_data rjt_data; |
24f089e2 | 758 | u32 sid; |
a7b12a27 | 759 | |
251748a9 | 760 | sid = fc_frame_sid(fp); |
a7b12a27 JE |
761 | |
762 | FC_RPORT_ID_DBG(lport, sid, "Received FLOGI request\n"); | |
763 | ||
764 | disc = &lport->disc; | |
765 | mutex_lock(&disc->disc_mutex); | |
766 | ||
767 | if (!lport->point_to_multipoint) { | |
768 | rjt_data.reason = ELS_RJT_UNSUP; | |
769 | rjt_data.explan = ELS_EXPL_NONE; | |
770 | goto reject; | |
771 | } | |
772 | ||
773 | flp = fc_frame_payload_get(fp, sizeof(*flp)); | |
774 | if (!flp) { | |
775 | rjt_data.reason = ELS_RJT_LOGIC; | |
776 | rjt_data.explan = ELS_EXPL_INV_LEN; | |
777 | goto reject; | |
778 | } | |
779 | ||
780 | rdata = lport->tt.rport_lookup(lport, sid); | |
781 | if (!rdata) { | |
782 | rjt_data.reason = ELS_RJT_FIP; | |
783 | rjt_data.explan = ELS_EXPL_NOT_NEIGHBOR; | |
784 | goto reject; | |
785 | } | |
786 | mutex_lock(&rdata->rp_mutex); | |
787 | ||
788 | FC_RPORT_DBG(rdata, "Received FLOGI in %s state\n", | |
789 | fc_rport_state(rdata)); | |
790 | ||
791 | switch (rdata->rp_state) { | |
792 | case RPORT_ST_INIT: | |
48058481 KP |
793 | /* |
794 | * If received the FLOGI request on RPORT which is INIT state | |
795 | * (means not transition to FLOGI either fc_rport timeout | |
796 | * function didn;t trigger or this end hasn;t received | |
797 | * beacon yet from other end. In that case only, allow RPORT | |
798 | * state machine to continue, otherwise fall through which | |
799 | * causes the code to send reject response. | |
800 | * NOTE; Not checking for FIP->state such as VNMP_UP or | |
801 | * VNMP_CLAIM because if FIP state is not one of those, | |
802 | * RPORT wouldn;t have created and 'rport_lookup' would have | |
803 | * failed anyway in that case. | |
804 | */ | |
805 | if (lport->point_to_multipoint) | |
806 | break; | |
a7b12a27 JE |
807 | case RPORT_ST_DELETE: |
808 | mutex_unlock(&rdata->rp_mutex); | |
809 | rjt_data.reason = ELS_RJT_FIP; | |
810 | rjt_data.explan = ELS_EXPL_NOT_NEIGHBOR; | |
811 | goto reject; | |
812 | case RPORT_ST_FLOGI: | |
813 | case RPORT_ST_PLOGI_WAIT: | |
814 | case RPORT_ST_PLOGI: | |
815 | break; | |
816 | case RPORT_ST_PRLI: | |
817 | case RPORT_ST_RTV: | |
818 | case RPORT_ST_READY: | |
819 | case RPORT_ST_ADISC: | |
820 | /* | |
821 | * Set the remote port to be deleted and to then restart. | |
822 | * This queues work to be sure exchanges are reset. | |
823 | */ | |
824 | fc_rport_enter_delete(rdata, RPORT_EV_LOGO); | |
825 | mutex_unlock(&rdata->rp_mutex); | |
826 | rjt_data.reason = ELS_RJT_BUSY; | |
827 | rjt_data.explan = ELS_EXPL_NONE; | |
828 | goto reject; | |
829 | } | |
830 | if (fc_rport_login_complete(rdata, fp)) { | |
831 | mutex_unlock(&rdata->rp_mutex); | |
832 | rjt_data.reason = ELS_RJT_LOGIC; | |
833 | rjt_data.explan = ELS_EXPL_NONE; | |
834 | goto reject; | |
835 | } | |
a7b12a27 JE |
836 | |
837 | fp = fc_frame_alloc(lport, sizeof(*flp)); | |
838 | if (!fp) | |
839 | goto out; | |
840 | ||
a7b12a27 JE |
841 | fc_flogi_fill(lport, fp); |
842 | flp = fc_frame_payload_get(fp, sizeof(*flp)); | |
843 | flp->fl_cmd = ELS_LS_ACC; | |
844 | ||
24f089e2 JE |
845 | fc_fill_reply_hdr(fp, rx_fp, FC_RCTL_ELS_REP, 0); |
846 | lport->tt.frame_send(lport, fp); | |
a7b12a27 JE |
847 | |
848 | if (rdata->ids.port_name < lport->wwpn) | |
849 | fc_rport_enter_plogi(rdata); | |
850 | else | |
851 | fc_rport_state_enter(rdata, RPORT_ST_PLOGI_WAIT); | |
852 | out: | |
853 | mutex_unlock(&rdata->rp_mutex); | |
854 | mutex_unlock(&disc->disc_mutex); | |
24f089e2 | 855 | fc_frame_free(rx_fp); |
a7b12a27 JE |
856 | return; |
857 | ||
858 | reject: | |
859 | mutex_unlock(&disc->disc_mutex); | |
92261156 | 860 | lport->tt.seq_els_rsp_send(rx_fp, ELS_LS_RJT, &rjt_data); |
24f089e2 | 861 | fc_frame_free(rx_fp); |
a7b12a27 JE |
862 | } |
863 | ||
864 | /** | |
865 | * fc_rport_plogi_resp() - Handler for ELS PLOGI responses | |
3a3b42bf RL |
866 | * @sp: The sequence the PLOGI is on |
867 | * @fp: The PLOGI response frame | |
868 | * @rdata_arg: The remote port that sent the PLOGI response | |
42e9a92f RL |
869 | * |
870 | * Locking Note: This function will be called without the rport lock | |
871 | * held, but it will lock, call an _enter_* function or fc_rport_error | |
872 | * and then unlock the rport. | |
873 | */ | |
874 | static void fc_rport_plogi_resp(struct fc_seq *sp, struct fc_frame *fp, | |
9fb9d328 | 875 | void *rdata_arg) |
42e9a92f | 876 | { |
9fb9d328 | 877 | struct fc_rport_priv *rdata = rdata_arg; |
42e9a92f | 878 | struct fc_lport *lport = rdata->local_port; |
a29e7646 | 879 | struct fc_els_flogi *plp = NULL; |
42e9a92f RL |
880 | u16 csp_seq; |
881 | u16 cssp_seq; | |
882 | u8 op; | |
883 | ||
884 | mutex_lock(&rdata->rp_mutex); | |
885 | ||
f657d299 | 886 | FC_RPORT_DBG(rdata, "Received a PLOGI %s\n", fc_els_resp_type(fp)); |
42e9a92f RL |
887 | |
888 | if (rdata->rp_state != RPORT_ST_PLOGI) { | |
9fb9d328 JE |
889 | FC_RPORT_DBG(rdata, "Received a PLOGI response, but in state " |
890 | "%s\n", fc_rport_state(rdata)); | |
76f6804e AJ |
891 | if (IS_ERR(fp)) |
892 | goto err; | |
42e9a92f RL |
893 | goto out; |
894 | } | |
895 | ||
76f6804e | 896 | if (IS_ERR(fp)) { |
9fb9d328 | 897 | fc_rport_error_retry(rdata, fp); |
76f6804e AJ |
898 | goto err; |
899 | } | |
900 | ||
42e9a92f RL |
901 | op = fc_frame_payload_op(fp); |
902 | if (op == ELS_LS_ACC && | |
903 | (plp = fc_frame_payload_get(fp, sizeof(*plp))) != NULL) { | |
f211fa51 JE |
904 | rdata->ids.port_name = get_unaligned_be64(&plp->fl_wwpn); |
905 | rdata->ids.node_name = get_unaligned_be64(&plp->fl_wwnn); | |
42e9a92f | 906 | |
75a2792d BPG |
907 | /* save plogi response sp_features for further reference */ |
908 | rdata->sp_features = ntohs(plp->fl_csp.sp_features); | |
909 | ||
a7b12a27 JE |
910 | if (lport->point_to_multipoint) |
911 | fc_rport_login_complete(rdata, fp); | |
42e9a92f RL |
912 | csp_seq = ntohs(plp->fl_csp.sp_tot_seq); |
913 | cssp_seq = ntohs(plp->fl_cssp[3 - 1].cp_con_seq); | |
914 | if (cssp_seq < csp_seq) | |
915 | csp_seq = cssp_seq; | |
916 | rdata->max_seq = csp_seq; | |
f211fa51 | 917 | rdata->maxframe_size = fc_plogi_get_maxframe(plp, lport->mfs); |
3ac6f98f | 918 | fc_rport_enter_prli(rdata); |
42e9a92f | 919 | } else |
9fb9d328 | 920 | fc_rport_error_retry(rdata, fp); |
42e9a92f RL |
921 | |
922 | out: | |
923 | fc_frame_free(fp); | |
924 | err: | |
925 | mutex_unlock(&rdata->rp_mutex); | |
f211fa51 | 926 | kref_put(&rdata->kref, rdata->local_port->tt.rport_destroy); |
42e9a92f RL |
927 | } |
928 | ||
e0335f67 MR |
929 | static bool |
930 | fc_rport_compatible_roles(struct fc_lport *lport, struct fc_rport_priv *rdata) | |
931 | { | |
932 | if (rdata->ids.roles == FC_PORT_ROLE_UNKNOWN) | |
933 | return true; | |
934 | if ((rdata->ids.roles & FC_PORT_ROLE_FCP_TARGET) && | |
935 | (lport->service_params & FCP_SPPF_INIT_FCN)) | |
936 | return true; | |
937 | if ((rdata->ids.roles & FC_PORT_ROLE_FCP_INITIATOR) && | |
938 | (lport->service_params & FCP_SPPF_TARG_FCN)) | |
939 | return true; | |
940 | return false; | |
941 | } | |
942 | ||
42e9a92f | 943 | /** |
3a3b42bf RL |
944 | * fc_rport_enter_plogi() - Send Port Login (PLOGI) request |
945 | * @rdata: The remote port to send a PLOGI to | |
42e9a92f RL |
946 | * |
947 | * Locking Note: The rport lock is expected to be held before calling | |
948 | * this routine. | |
949 | */ | |
9fb9d328 | 950 | static void fc_rport_enter_plogi(struct fc_rport_priv *rdata) |
42e9a92f | 951 | { |
42e9a92f RL |
952 | struct fc_lport *lport = rdata->local_port; |
953 | struct fc_frame *fp; | |
954 | ||
e0335f67 MR |
955 | if (!fc_rport_compatible_roles(lport, rdata)) { |
956 | FC_RPORT_DBG(rdata, "PLOGI suppressed for incompatible role\n"); | |
957 | fc_rport_state_enter(rdata, RPORT_ST_PLOGI_WAIT); | |
958 | return; | |
959 | } | |
960 | ||
9fb9d328 JE |
961 | FC_RPORT_DBG(rdata, "Port entered PLOGI state from %s state\n", |
962 | fc_rport_state(rdata)); | |
42e9a92f | 963 | |
9fb9d328 | 964 | fc_rport_state_enter(rdata, RPORT_ST_PLOGI); |
42e9a92f | 965 | |
f211fa51 | 966 | rdata->maxframe_size = FC_MIN_MAX_PAYLOAD; |
42e9a92f RL |
967 | fp = fc_frame_alloc(lport, sizeof(struct fc_els_flogi)); |
968 | if (!fp) { | |
a7b12a27 | 969 | FC_RPORT_DBG(rdata, "%s frame alloc failed\n", __func__); |
9fb9d328 | 970 | fc_rport_error_retry(rdata, fp); |
42e9a92f RL |
971 | return; |
972 | } | |
973 | rdata->e_d_tov = lport->e_d_tov; | |
974 | ||
f211fa51 | 975 | if (!lport->tt.elsct_send(lport, rdata->ids.port_id, fp, ELS_PLOGI, |
b94f8951 JE |
976 | fc_rport_plogi_resp, rdata, |
977 | 2 * lport->r_a_tov)) | |
8f550f93 | 978 | fc_rport_error_retry(rdata, NULL); |
42e9a92f | 979 | else |
f211fa51 | 980 | kref_get(&rdata->kref); |
42e9a92f RL |
981 | } |
982 | ||
983 | /** | |
34f42a07 | 984 | * fc_rport_prli_resp() - Process Login (PRLI) response handler |
3a3b42bf RL |
985 | * @sp: The sequence the PRLI response was on |
986 | * @fp: The PRLI response frame | |
987 | * @rdata_arg: The remote port that sent the PRLI response | |
42e9a92f RL |
988 | * |
989 | * Locking Note: This function will be called without the rport lock | |
990 | * held, but it will lock, call an _enter_* function or fc_rport_error | |
991 | * and then unlock the rport. | |
992 | */ | |
993 | static void fc_rport_prli_resp(struct fc_seq *sp, struct fc_frame *fp, | |
9fb9d328 | 994 | void *rdata_arg) |
42e9a92f | 995 | { |
9fb9d328 | 996 | struct fc_rport_priv *rdata = rdata_arg; |
42e9a92f RL |
997 | struct { |
998 | struct fc_els_prli prli; | |
999 | struct fc_els_spp spp; | |
1000 | } *pp; | |
925cedae JE |
1001 | struct fc_els_spp temp_spp; |
1002 | struct fc4_prov *prov; | |
42e9a92f RL |
1003 | u32 roles = FC_RPORT_ROLE_UNKNOWN; |
1004 | u32 fcp_parm = 0; | |
1005 | u8 op; | |
618461c0 | 1006 | u8 resp_code = 0; |
42e9a92f RL |
1007 | |
1008 | mutex_lock(&rdata->rp_mutex); | |
1009 | ||
f657d299 | 1010 | FC_RPORT_DBG(rdata, "Received a PRLI %s\n", fc_els_resp_type(fp)); |
42e9a92f RL |
1011 | |
1012 | if (rdata->rp_state != RPORT_ST_PRLI) { | |
9fb9d328 JE |
1013 | FC_RPORT_DBG(rdata, "Received a PRLI response, but in state " |
1014 | "%s\n", fc_rport_state(rdata)); | |
76f6804e AJ |
1015 | if (IS_ERR(fp)) |
1016 | goto err; | |
42e9a92f RL |
1017 | goto out; |
1018 | } | |
1019 | ||
76f6804e | 1020 | if (IS_ERR(fp)) { |
9fb9d328 | 1021 | fc_rport_error_retry(rdata, fp); |
76f6804e AJ |
1022 | goto err; |
1023 | } | |
1024 | ||
6bd054cb RL |
1025 | /* reinitialize remote port roles */ |
1026 | rdata->ids.roles = FC_RPORT_ROLE_UNKNOWN; | |
1027 | ||
42e9a92f RL |
1028 | op = fc_frame_payload_op(fp); |
1029 | if (op == ELS_LS_ACC) { | |
1030 | pp = fc_frame_payload_get(fp, sizeof(*pp)); | |
618461c0 BPG |
1031 | if (!pp) |
1032 | goto out; | |
1033 | ||
1034 | resp_code = (pp->spp.spp_flags & FC_SPP_RESP_MASK); | |
1035 | FC_RPORT_DBG(rdata, "PRLI spp_flags = 0x%x\n", | |
1036 | pp->spp.spp_flags); | |
75a2792d | 1037 | rdata->spp_type = pp->spp.spp_type; |
618461c0 BPG |
1038 | if (resp_code != FC_SPP_RESP_ACK) { |
1039 | if (resp_code == FC_SPP_RESP_CONF) | |
1040 | fc_rport_error(rdata, fp); | |
1041 | else | |
1042 | fc_rport_error_retry(rdata, fp); | |
1043 | goto out; | |
42e9a92f | 1044 | } |
618461c0 BPG |
1045 | if (pp->prli.prli_spp_len < sizeof(pp->spp)) |
1046 | goto out; | |
1047 | ||
1048 | fcp_parm = ntohl(pp->spp.spp_params); | |
1049 | if (fcp_parm & FCP_SPPF_RETRY) | |
1050 | rdata->flags |= FC_RP_FLAGS_RETRY; | |
75a2792d BPG |
1051 | if (fcp_parm & FCP_SPPF_CONF_COMPL) |
1052 | rdata->flags |= FC_RP_FLAGS_CONF_REQ; | |
42e9a92f | 1053 | |
925cedae JE |
1054 | prov = fc_passive_prov[FC_TYPE_FCP]; |
1055 | if (prov) { | |
1056 | memset(&temp_spp, 0, sizeof(temp_spp)); | |
1057 | prov->prli(rdata, pp->prli.prli_spp_len, | |
1058 | &pp->spp, &temp_spp); | |
1059 | } | |
1060 | ||
f211fa51 | 1061 | rdata->supported_classes = FC_COS_CLASS3; |
42e9a92f RL |
1062 | if (fcp_parm & FCP_SPPF_INIT_FCN) |
1063 | roles |= FC_RPORT_ROLE_FCP_INITIATOR; | |
1064 | if (fcp_parm & FCP_SPPF_TARG_FCN) | |
1065 | roles |= FC_RPORT_ROLE_FCP_TARGET; | |
1066 | ||
f211fa51 | 1067 | rdata->ids.roles = roles; |
9fb9d328 | 1068 | fc_rport_enter_rtv(rdata); |
42e9a92f RL |
1069 | |
1070 | } else { | |
9fb9d328 | 1071 | FC_RPORT_DBG(rdata, "Bad ELS response for PRLI command\n"); |
292e40b9 | 1072 | fc_rport_error_retry(rdata, fp); |
42e9a92f RL |
1073 | } |
1074 | ||
1075 | out: | |
1076 | fc_frame_free(fp); | |
1077 | err: | |
1078 | mutex_unlock(&rdata->rp_mutex); | |
f211fa51 | 1079 | kref_put(&rdata->kref, rdata->local_port->tt.rport_destroy); |
42e9a92f RL |
1080 | } |
1081 | ||
42e9a92f | 1082 | /** |
3a3b42bf RL |
1083 | * fc_rport_enter_prli() - Send Process Login (PRLI) request |
1084 | * @rdata: The remote port to send the PRLI request to | |
42e9a92f RL |
1085 | * |
1086 | * Locking Note: The rport lock is expected to be held before calling | |
1087 | * this routine. | |
1088 | */ | |
9fb9d328 | 1089 | static void fc_rport_enter_prli(struct fc_rport_priv *rdata) |
42e9a92f | 1090 | { |
42e9a92f RL |
1091 | struct fc_lport *lport = rdata->local_port; |
1092 | struct { | |
1093 | struct fc_els_prli prli; | |
1094 | struct fc_els_spp spp; | |
1095 | } *pp; | |
1096 | struct fc_frame *fp; | |
925cedae | 1097 | struct fc4_prov *prov; |
42e9a92f | 1098 | |
3ac6f98f JE |
1099 | /* |
1100 | * If the rport is one of the well known addresses | |
1101 | * we skip PRLI and RTV and go straight to READY. | |
1102 | */ | |
1103 | if (rdata->ids.port_id >= FC_FID_DOM_MGR) { | |
1104 | fc_rport_enter_ready(rdata); | |
1105 | return; | |
1106 | } | |
1107 | ||
9fb9d328 JE |
1108 | FC_RPORT_DBG(rdata, "Port entered PRLI state from %s state\n", |
1109 | fc_rport_state(rdata)); | |
42e9a92f | 1110 | |
9fb9d328 | 1111 | fc_rport_state_enter(rdata, RPORT_ST_PRLI); |
42e9a92f RL |
1112 | |
1113 | fp = fc_frame_alloc(lport, sizeof(*pp)); | |
1114 | if (!fp) { | |
9fb9d328 | 1115 | fc_rport_error_retry(rdata, fp); |
42e9a92f RL |
1116 | return; |
1117 | } | |
1118 | ||
925cedae JE |
1119 | fc_prli_fill(lport, fp); |
1120 | ||
1121 | prov = fc_passive_prov[FC_TYPE_FCP]; | |
1122 | if (prov) { | |
1123 | pp = fc_frame_payload_get(fp, sizeof(*pp)); | |
1124 | prov->prli(rdata, sizeof(pp->spp), NULL, &pp->spp); | |
1125 | } | |
1126 | ||
1127 | fc_fill_fc_hdr(fp, FC_RCTL_ELS_REQ, rdata->ids.port_id, | |
1128 | fc_host_port_id(lport->host), FC_TYPE_ELS, | |
1129 | FC_FC_FIRST_SEQ | FC_FC_END_SEQ | FC_FC_SEQ_INIT, 0); | |
1130 | ||
1131 | if (!lport->tt.exch_seq_send(lport, fp, fc_rport_prli_resp, | |
1132 | NULL, rdata, 2 * lport->r_a_tov)) | |
8f550f93 | 1133 | fc_rport_error_retry(rdata, NULL); |
42e9a92f | 1134 | else |
f211fa51 | 1135 | kref_get(&rdata->kref); |
42e9a92f RL |
1136 | } |
1137 | ||
1138 | /** | |
3a3b42bf RL |
1139 | * fc_rport_els_rtv_resp() - Handler for Request Timeout Value (RTV) responses |
1140 | * @sp: The sequence the RTV was on | |
1141 | * @fp: The RTV response frame | |
1142 | * @rdata_arg: The remote port that sent the RTV response | |
42e9a92f RL |
1143 | * |
1144 | * Many targets don't seem to support this. | |
1145 | * | |
1146 | * Locking Note: This function will be called without the rport lock | |
1147 | * held, but it will lock, call an _enter_* function or fc_rport_error | |
1148 | * and then unlock the rport. | |
1149 | */ | |
1150 | static void fc_rport_rtv_resp(struct fc_seq *sp, struct fc_frame *fp, | |
9fb9d328 | 1151 | void *rdata_arg) |
42e9a92f | 1152 | { |
9fb9d328 | 1153 | struct fc_rport_priv *rdata = rdata_arg; |
42e9a92f RL |
1154 | u8 op; |
1155 | ||
1156 | mutex_lock(&rdata->rp_mutex); | |
1157 | ||
f657d299 | 1158 | FC_RPORT_DBG(rdata, "Received a RTV %s\n", fc_els_resp_type(fp)); |
42e9a92f RL |
1159 | |
1160 | if (rdata->rp_state != RPORT_ST_RTV) { | |
9fb9d328 JE |
1161 | FC_RPORT_DBG(rdata, "Received a RTV response, but in state " |
1162 | "%s\n", fc_rport_state(rdata)); | |
76f6804e AJ |
1163 | if (IS_ERR(fp)) |
1164 | goto err; | |
42e9a92f RL |
1165 | goto out; |
1166 | } | |
1167 | ||
76f6804e | 1168 | if (IS_ERR(fp)) { |
9fb9d328 | 1169 | fc_rport_error(rdata, fp); |
76f6804e AJ |
1170 | goto err; |
1171 | } | |
1172 | ||
42e9a92f RL |
1173 | op = fc_frame_payload_op(fp); |
1174 | if (op == ELS_LS_ACC) { | |
1175 | struct fc_els_rtv_acc *rtv; | |
1176 | u32 toq; | |
1177 | u32 tov; | |
1178 | ||
1179 | rtv = fc_frame_payload_get(fp, sizeof(*rtv)); | |
1180 | if (rtv) { | |
1181 | toq = ntohl(rtv->rtv_toq); | |
1182 | tov = ntohl(rtv->rtv_r_a_tov); | |
1183 | if (tov == 0) | |
1184 | tov = 1; | |
1185 | rdata->r_a_tov = tov; | |
1186 | tov = ntohl(rtv->rtv_e_d_tov); | |
1187 | if (toq & FC_ELS_RTV_EDRES) | |
1188 | tov /= 1000000; | |
1189 | if (tov == 0) | |
1190 | tov = 1; | |
1191 | rdata->e_d_tov = tov; | |
1192 | } | |
1193 | } | |
1194 | ||
9fb9d328 | 1195 | fc_rport_enter_ready(rdata); |
42e9a92f RL |
1196 | |
1197 | out: | |
1198 | fc_frame_free(fp); | |
1199 | err: | |
1200 | mutex_unlock(&rdata->rp_mutex); | |
f211fa51 | 1201 | kref_put(&rdata->kref, rdata->local_port->tt.rport_destroy); |
42e9a92f RL |
1202 | } |
1203 | ||
1204 | /** | |
3a3b42bf RL |
1205 | * fc_rport_enter_rtv() - Send Request Timeout Value (RTV) request |
1206 | * @rdata: The remote port to send the RTV request to | |
42e9a92f RL |
1207 | * |
1208 | * Locking Note: The rport lock is expected to be held before calling | |
1209 | * this routine. | |
1210 | */ | |
9fb9d328 | 1211 | static void fc_rport_enter_rtv(struct fc_rport_priv *rdata) |
42e9a92f RL |
1212 | { |
1213 | struct fc_frame *fp; | |
42e9a92f RL |
1214 | struct fc_lport *lport = rdata->local_port; |
1215 | ||
9fb9d328 JE |
1216 | FC_RPORT_DBG(rdata, "Port entered RTV state from %s state\n", |
1217 | fc_rport_state(rdata)); | |
42e9a92f | 1218 | |
9fb9d328 | 1219 | fc_rport_state_enter(rdata, RPORT_ST_RTV); |
42e9a92f RL |
1220 | |
1221 | fp = fc_frame_alloc(lport, sizeof(struct fc_els_rtv)); | |
1222 | if (!fp) { | |
9fb9d328 | 1223 | fc_rport_error_retry(rdata, fp); |
42e9a92f RL |
1224 | return; |
1225 | } | |
1226 | ||
f211fa51 | 1227 | if (!lport->tt.elsct_send(lport, rdata->ids.port_id, fp, ELS_RTV, |
b94f8951 JE |
1228 | fc_rport_rtv_resp, rdata, |
1229 | 2 * lport->r_a_tov)) | |
8f550f93 | 1230 | fc_rport_error_retry(rdata, NULL); |
42e9a92f | 1231 | else |
f211fa51 | 1232 | kref_get(&rdata->kref); |
42e9a92f RL |
1233 | } |
1234 | ||
079ecd8c JE |
1235 | /** |
1236 | * fc_rport_logo_resp() - Handler for logout (LOGO) responses | |
1237 | * @sp: The sequence the LOGO was on | |
1238 | * @fp: The LOGO response frame | |
1239 | * @lport_arg: The local port | |
1240 | */ | |
1241 | static void fc_rport_logo_resp(struct fc_seq *sp, struct fc_frame *fp, | |
1242 | void *lport_arg) | |
1243 | { | |
1244 | struct fc_lport *lport = lport_arg; | |
1245 | ||
1246 | FC_RPORT_ID_DBG(lport, fc_seq_exch(sp)->did, | |
1247 | "Received a LOGO %s\n", fc_els_resp_type(fp)); | |
1248 | if (IS_ERR(fp)) | |
1249 | return; | |
1250 | fc_frame_free(fp); | |
1251 | } | |
1252 | ||
42e9a92f | 1253 | /** |
3a3b42bf RL |
1254 | * fc_rport_enter_logo() - Send a logout (LOGO) request |
1255 | * @rdata: The remote port to send the LOGO request to | |
42e9a92f RL |
1256 | * |
1257 | * Locking Note: The rport lock is expected to be held before calling | |
1258 | * this routine. | |
1259 | */ | |
9fb9d328 | 1260 | static void fc_rport_enter_logo(struct fc_rport_priv *rdata) |
42e9a92f | 1261 | { |
42e9a92f RL |
1262 | struct fc_lport *lport = rdata->local_port; |
1263 | struct fc_frame *fp; | |
1264 | ||
079ecd8c | 1265 | FC_RPORT_DBG(rdata, "Port sending LOGO from %s state\n", |
9fb9d328 | 1266 | fc_rport_state(rdata)); |
42e9a92f | 1267 | |
42e9a92f | 1268 | fp = fc_frame_alloc(lport, sizeof(struct fc_els_logo)); |
079ecd8c | 1269 | if (!fp) |
42e9a92f | 1270 | return; |
079ecd8c JE |
1271 | (void)lport->tt.elsct_send(lport, rdata->ids.port_id, fp, ELS_LOGO, |
1272 | fc_rport_logo_resp, lport, 0); | |
42e9a92f RL |
1273 | } |
1274 | ||
370c3bd0 | 1275 | /** |
3a3b42bf RL |
1276 | * fc_rport_els_adisc_resp() - Handler for Address Discovery (ADISC) responses |
1277 | * @sp: The sequence the ADISC response was on | |
1278 | * @fp: The ADISC response frame | |
1279 | * @rdata_arg: The remote port that sent the ADISC response | |
370c3bd0 JE |
1280 | * |
1281 | * Locking Note: This function will be called without the rport lock | |
1282 | * held, but it will lock, call an _enter_* function or fc_rport_error | |
1283 | * and then unlock the rport. | |
1284 | */ | |
1285 | static void fc_rport_adisc_resp(struct fc_seq *sp, struct fc_frame *fp, | |
3a3b42bf | 1286 | void *rdata_arg) |
370c3bd0 JE |
1287 | { |
1288 | struct fc_rport_priv *rdata = rdata_arg; | |
1289 | struct fc_els_adisc *adisc; | |
1290 | u8 op; | |
1291 | ||
1292 | mutex_lock(&rdata->rp_mutex); | |
1293 | ||
1294 | FC_RPORT_DBG(rdata, "Received a ADISC response\n"); | |
1295 | ||
1296 | if (rdata->rp_state != RPORT_ST_ADISC) { | |
1297 | FC_RPORT_DBG(rdata, "Received a ADISC resp but in state %s\n", | |
1298 | fc_rport_state(rdata)); | |
1299 | if (IS_ERR(fp)) | |
1300 | goto err; | |
1301 | goto out; | |
1302 | } | |
1303 | ||
1304 | if (IS_ERR(fp)) { | |
1305 | fc_rport_error(rdata, fp); | |
1306 | goto err; | |
1307 | } | |
1308 | ||
1309 | /* | |
1310 | * If address verification failed. Consider us logged out of the rport. | |
1311 | * Since the rport is still in discovery, we want to be | |
1312 | * logged in, so go to PLOGI state. Otherwise, go back to READY. | |
1313 | */ | |
1314 | op = fc_frame_payload_op(fp); | |
1315 | adisc = fc_frame_payload_get(fp, sizeof(*adisc)); | |
1316 | if (op != ELS_LS_ACC || !adisc || | |
1317 | ntoh24(adisc->adisc_port_id) != rdata->ids.port_id || | |
1318 | get_unaligned_be64(&adisc->adisc_wwpn) != rdata->ids.port_name || | |
1319 | get_unaligned_be64(&adisc->adisc_wwnn) != rdata->ids.node_name) { | |
1320 | FC_RPORT_DBG(rdata, "ADISC error or mismatch\n"); | |
a7b12a27 | 1321 | fc_rport_enter_flogi(rdata); |
370c3bd0 JE |
1322 | } else { |
1323 | FC_RPORT_DBG(rdata, "ADISC OK\n"); | |
1324 | fc_rport_enter_ready(rdata); | |
1325 | } | |
1326 | out: | |
1327 | fc_frame_free(fp); | |
1328 | err: | |
1329 | mutex_unlock(&rdata->rp_mutex); | |
1330 | kref_put(&rdata->kref, rdata->local_port->tt.rport_destroy); | |
1331 | } | |
1332 | ||
1333 | /** | |
3a3b42bf RL |
1334 | * fc_rport_enter_adisc() - Send Address Discover (ADISC) request |
1335 | * @rdata: The remote port to send the ADISC request to | |
370c3bd0 JE |
1336 | * |
1337 | * Locking Note: The rport lock is expected to be held before calling | |
1338 | * this routine. | |
1339 | */ | |
1340 | static void fc_rport_enter_adisc(struct fc_rport_priv *rdata) | |
1341 | { | |
1342 | struct fc_lport *lport = rdata->local_port; | |
1343 | struct fc_frame *fp; | |
1344 | ||
1345 | FC_RPORT_DBG(rdata, "sending ADISC from %s state\n", | |
1346 | fc_rport_state(rdata)); | |
1347 | ||
1348 | fc_rport_state_enter(rdata, RPORT_ST_ADISC); | |
1349 | ||
1350 | fp = fc_frame_alloc(lport, sizeof(struct fc_els_adisc)); | |
1351 | if (!fp) { | |
1352 | fc_rport_error_retry(rdata, fp); | |
1353 | return; | |
1354 | } | |
1355 | if (!lport->tt.elsct_send(lport, rdata->ids.port_id, fp, ELS_ADISC, | |
b94f8951 JE |
1356 | fc_rport_adisc_resp, rdata, |
1357 | 2 * lport->r_a_tov)) | |
8f550f93 | 1358 | fc_rport_error_retry(rdata, NULL); |
370c3bd0 JE |
1359 | else |
1360 | kref_get(&rdata->kref); | |
1361 | } | |
1362 | ||
8abbe3a4 | 1363 | /** |
3a3b42bf RL |
1364 | * fc_rport_recv_adisc_req() - Handler for Address Discovery (ADISC) requests |
1365 | * @rdata: The remote port that sent the ADISC request | |
3a3b42bf | 1366 | * @in_fp: The ADISC request frame |
8abbe3a4 JE |
1367 | * |
1368 | * Locking Note: Called with the lport and rport locks held. | |
1369 | */ | |
1370 | static void fc_rport_recv_adisc_req(struct fc_rport_priv *rdata, | |
92261156 | 1371 | struct fc_frame *in_fp) |
8abbe3a4 JE |
1372 | { |
1373 | struct fc_lport *lport = rdata->local_port; | |
1374 | struct fc_frame *fp; | |
8abbe3a4 JE |
1375 | struct fc_els_adisc *adisc; |
1376 | struct fc_seq_els_data rjt_data; | |
8abbe3a4 JE |
1377 | |
1378 | FC_RPORT_DBG(rdata, "Received ADISC request\n"); | |
1379 | ||
1380 | adisc = fc_frame_payload_get(in_fp, sizeof(*adisc)); | |
1381 | if (!adisc) { | |
8abbe3a4 JE |
1382 | rjt_data.reason = ELS_RJT_PROT; |
1383 | rjt_data.explan = ELS_EXPL_INV_LEN; | |
92261156 | 1384 | lport->tt.seq_els_rsp_send(in_fp, ELS_LS_RJT, &rjt_data); |
8abbe3a4 JE |
1385 | goto drop; |
1386 | } | |
1387 | ||
1388 | fp = fc_frame_alloc(lport, sizeof(*adisc)); | |
1389 | if (!fp) | |
1390 | goto drop; | |
1391 | fc_adisc_fill(lport, fp); | |
1392 | adisc = fc_frame_payload_get(fp, sizeof(*adisc)); | |
1393 | adisc->adisc_cmd = ELS_LS_ACC; | |
24f089e2 JE |
1394 | fc_fill_reply_hdr(fp, in_fp, FC_RCTL_ELS_REP, 0); |
1395 | lport->tt.frame_send(lport, fp); | |
8abbe3a4 JE |
1396 | drop: |
1397 | fc_frame_free(in_fp); | |
1398 | } | |
1399 | ||
63e27fb8 YZ |
1400 | /** |
1401 | * fc_rport_recv_rls_req() - Handle received Read Link Status request | |
1402 | * @rdata: The remote port that sent the RLS request | |
63e27fb8 YZ |
1403 | * @rx_fp: The PRLI request frame |
1404 | * | |
1405 | * Locking Note: The rport lock is expected to be held before calling | |
1406 | * this function. | |
1407 | */ | |
1408 | static void fc_rport_recv_rls_req(struct fc_rport_priv *rdata, | |
92261156 | 1409 | struct fc_frame *rx_fp) |
63e27fb8 YZ |
1410 | |
1411 | { | |
1412 | struct fc_lport *lport = rdata->local_port; | |
1413 | struct fc_frame *fp; | |
63e27fb8 YZ |
1414 | struct fc_els_rls *rls; |
1415 | struct fc_els_rls_resp *rsp; | |
1416 | struct fc_els_lesb *lesb; | |
1417 | struct fc_seq_els_data rjt_data; | |
1418 | struct fc_host_statistics *hst; | |
63e27fb8 YZ |
1419 | |
1420 | FC_RPORT_DBG(rdata, "Received RLS request while in state %s\n", | |
1421 | fc_rport_state(rdata)); | |
1422 | ||
1423 | rls = fc_frame_payload_get(rx_fp, sizeof(*rls)); | |
1424 | if (!rls) { | |
1425 | rjt_data.reason = ELS_RJT_PROT; | |
1426 | rjt_data.explan = ELS_EXPL_INV_LEN; | |
1427 | goto out_rjt; | |
1428 | } | |
1429 | ||
1430 | fp = fc_frame_alloc(lport, sizeof(*rsp)); | |
1431 | if (!fp) { | |
1432 | rjt_data.reason = ELS_RJT_UNAB; | |
1433 | rjt_data.explan = ELS_EXPL_INSUF_RES; | |
1434 | goto out_rjt; | |
1435 | } | |
1436 | ||
1437 | rsp = fc_frame_payload_get(fp, sizeof(*rsp)); | |
1438 | memset(rsp, 0, sizeof(*rsp)); | |
1439 | rsp->rls_cmd = ELS_LS_ACC; | |
1440 | lesb = &rsp->rls_lesb; | |
1441 | if (lport->tt.get_lesb) { | |
1442 | /* get LESB from LLD if it supports it */ | |
1443 | lport->tt.get_lesb(lport, lesb); | |
1444 | } else { | |
1445 | fc_get_host_stats(lport->host); | |
1446 | hst = &lport->host_stats; | |
1447 | lesb->lesb_link_fail = htonl(hst->link_failure_count); | |
1448 | lesb->lesb_sync_loss = htonl(hst->loss_of_sync_count); | |
1449 | lesb->lesb_sig_loss = htonl(hst->loss_of_signal_count); | |
1450 | lesb->lesb_prim_err = htonl(hst->prim_seq_protocol_err_count); | |
1451 | lesb->lesb_inv_word = htonl(hst->invalid_tx_word_count); | |
1452 | lesb->lesb_inv_crc = htonl(hst->invalid_crc_count); | |
1453 | } | |
1454 | ||
24f089e2 JE |
1455 | fc_fill_reply_hdr(fp, rx_fp, FC_RCTL_ELS_REP, 0); |
1456 | lport->tt.frame_send(lport, fp); | |
63e27fb8 YZ |
1457 | goto out; |
1458 | ||
1459 | out_rjt: | |
92261156 | 1460 | lport->tt.seq_els_rsp_send(rx_fp, ELS_LS_RJT, &rjt_data); |
63e27fb8 YZ |
1461 | out: |
1462 | fc_frame_free(rx_fp); | |
1463 | } | |
1464 | ||
42e9a92f | 1465 | /** |
3a3b42bf RL |
1466 | * fc_rport_recv_els_req() - Handler for validated ELS requests |
1467 | * @lport: The local port that received the ELS request | |
3a3b42bf | 1468 | * @fp: The ELS request frame |
83fe6a93 JE |
1469 | * |
1470 | * Handle incoming ELS requests that require port login. | |
1471 | * The ELS opcode has already been validated by the caller. | |
42e9a92f | 1472 | * |
131203a1 | 1473 | * Locking Note: Called with the lport lock held. |
42e9a92f | 1474 | */ |
92261156 | 1475 | static void fc_rport_recv_els_req(struct fc_lport *lport, struct fc_frame *fp) |
42e9a92f | 1476 | { |
131203a1 | 1477 | struct fc_rport_priv *rdata; |
42e9a92f | 1478 | struct fc_seq_els_data els_data; |
42e9a92f | 1479 | |
25b37b98 | 1480 | mutex_lock(&lport->disc.disc_mutex); |
251748a9 | 1481 | rdata = lport->tt.rport_lookup(lport, fc_frame_sid(fp)); |
131203a1 | 1482 | if (!rdata) { |
25b37b98 | 1483 | mutex_unlock(&lport->disc.disc_mutex); |
83fe6a93 | 1484 | goto reject; |
131203a1 JE |
1485 | } |
1486 | mutex_lock(&rdata->rp_mutex); | |
25b37b98 | 1487 | mutex_unlock(&lport->disc.disc_mutex); |
131203a1 | 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); | |
1497 | goto reject; | |
1498 | } | |
1499 | ||
1500 | switch (fc_frame_payload_op(fp)) { | |
131203a1 | 1501 | case ELS_PRLI: |
92261156 | 1502 | fc_rport_recv_prli_req(rdata, fp); |
131203a1 JE |
1503 | break; |
1504 | case ELS_PRLO: | |
92261156 | 1505 | fc_rport_recv_prlo_req(rdata, fp); |
131203a1 | 1506 | break; |
8abbe3a4 | 1507 | case ELS_ADISC: |
92261156 | 1508 | fc_rport_recv_adisc_req(rdata, fp); |
8abbe3a4 | 1509 | break; |
131203a1 | 1510 | case ELS_RRQ: |
92261156 JE |
1511 | lport->tt.seq_els_rsp_send(fp, ELS_RRQ, NULL); |
1512 | fc_frame_free(fp); | |
131203a1 JE |
1513 | break; |
1514 | case ELS_REC: | |
92261156 JE |
1515 | lport->tt.seq_els_rsp_send(fp, ELS_REC, NULL); |
1516 | fc_frame_free(fp); | |
131203a1 | 1517 | break; |
63e27fb8 | 1518 | case ELS_RLS: |
92261156 | 1519 | fc_rport_recv_rls_req(rdata, fp); |
63e27fb8 | 1520 | break; |
131203a1 | 1521 | default: |
83fe6a93 | 1522 | fc_frame_free(fp); /* can't happen */ |
131203a1 | 1523 | break; |
42e9a92f RL |
1524 | } |
1525 | ||
1526 | mutex_unlock(&rdata->rp_mutex); | |
83fe6a93 JE |
1527 | return; |
1528 | ||
1529 | reject: | |
92261156 JE |
1530 | els_data.reason = ELS_RJT_UNAB; |
1531 | els_data.explan = ELS_EXPL_PLOGI_REQD; | |
1532 | lport->tt.seq_els_rsp_send(fp, ELS_LS_RJT, &els_data); | |
83fe6a93 JE |
1533 | fc_frame_free(fp); |
1534 | } | |
1535 | ||
1536 | /** | |
3a3b42bf | 1537 | * fc_rport_recv_req() - Handler for requests |
3a3b42bf | 1538 | * @lport: The local port that received the request |
92261156 | 1539 | * @fp: The request frame |
83fe6a93 JE |
1540 | * |
1541 | * Locking Note: Called with the lport lock held. | |
1542 | */ | |
c6b21c93 | 1543 | static void fc_rport_recv_req(struct fc_lport *lport, struct fc_frame *fp) |
83fe6a93 JE |
1544 | { |
1545 | struct fc_seq_els_data els_data; | |
1546 | ||
1547 | /* | |
a7b12a27 | 1548 | * Handle FLOGI, PLOGI and LOGO requests separately, since they |
83fe6a93 JE |
1549 | * don't require prior login. |
1550 | * Check for unsupported opcodes first and reject them. | |
1551 | * For some ops, it would be incorrect to reject with "PLOGI required". | |
1552 | */ | |
1553 | switch (fc_frame_payload_op(fp)) { | |
a7b12a27 | 1554 | case ELS_FLOGI: |
92261156 | 1555 | fc_rport_recv_flogi_req(lport, fp); |
a7b12a27 | 1556 | break; |
83fe6a93 | 1557 | case ELS_PLOGI: |
92261156 | 1558 | fc_rport_recv_plogi_req(lport, fp); |
83fe6a93 JE |
1559 | break; |
1560 | case ELS_LOGO: | |
92261156 | 1561 | fc_rport_recv_logo_req(lport, fp); |
83fe6a93 JE |
1562 | break; |
1563 | case ELS_PRLI: | |
1564 | case ELS_PRLO: | |
8abbe3a4 | 1565 | case ELS_ADISC: |
83fe6a93 JE |
1566 | case ELS_RRQ: |
1567 | case ELS_REC: | |
63e27fb8 | 1568 | case ELS_RLS: |
92261156 | 1569 | fc_rport_recv_els_req(lport, fp); |
83fe6a93 JE |
1570 | break; |
1571 | default: | |
83fe6a93 JE |
1572 | els_data.reason = ELS_RJT_UNSUP; |
1573 | els_data.explan = ELS_EXPL_NONE; | |
92261156 JE |
1574 | lport->tt.seq_els_rsp_send(fp, ELS_LS_RJT, &els_data); |
1575 | fc_frame_free(fp); | |
83fe6a93 JE |
1576 | break; |
1577 | } | |
42e9a92f RL |
1578 | } |
1579 | ||
1580 | /** | |
3a3b42bf RL |
1581 | * fc_rport_recv_plogi_req() - Handler for Port Login (PLOGI) requests |
1582 | * @lport: The local port that received the PLOGI request | |
3a3b42bf | 1583 | * @rx_fp: The PLOGI request frame |
42e9a92f | 1584 | * |
3ac6f98f | 1585 | * Locking Note: The rport lock is held before calling this function. |
42e9a92f | 1586 | */ |
3ac6f98f | 1587 | static void fc_rport_recv_plogi_req(struct fc_lport *lport, |
92261156 | 1588 | struct fc_frame *rx_fp) |
42e9a92f | 1589 | { |
3ac6f98f JE |
1590 | struct fc_disc *disc; |
1591 | struct fc_rport_priv *rdata; | |
42e9a92f | 1592 | struct fc_frame *fp = rx_fp; |
42e9a92f RL |
1593 | struct fc_els_flogi *pl; |
1594 | struct fc_seq_els_data rjt_data; | |
24f089e2 | 1595 | u32 sid; |
42e9a92f | 1596 | |
251748a9 | 1597 | sid = fc_frame_sid(fp); |
42e9a92f | 1598 | |
3ac6f98f | 1599 | FC_RPORT_ID_DBG(lport, sid, "Received PLOGI request\n"); |
42e9a92f | 1600 | |
42e9a92f RL |
1601 | pl = fc_frame_payload_get(fp, sizeof(*pl)); |
1602 | if (!pl) { | |
3ac6f98f JE |
1603 | FC_RPORT_ID_DBG(lport, sid, "Received PLOGI too short\n"); |
1604 | rjt_data.reason = ELS_RJT_PROT; | |
1605 | rjt_data.explan = ELS_EXPL_INV_LEN; | |
1606 | goto reject; | |
42e9a92f | 1607 | } |
3ac6f98f JE |
1608 | |
1609 | disc = &lport->disc; | |
1610 | mutex_lock(&disc->disc_mutex); | |
1611 | rdata = lport->tt.rport_create(lport, sid); | |
1612 | if (!rdata) { | |
1613 | mutex_unlock(&disc->disc_mutex); | |
1614 | rjt_data.reason = ELS_RJT_UNAB; | |
1615 | rjt_data.explan = ELS_EXPL_INSUF_RES; | |
1616 | goto reject; | |
1617 | } | |
1618 | ||
1619 | mutex_lock(&rdata->rp_mutex); | |
1620 | mutex_unlock(&disc->disc_mutex); | |
1621 | ||
1622 | rdata->ids.port_name = get_unaligned_be64(&pl->fl_wwpn); | |
1623 | rdata->ids.node_name = get_unaligned_be64(&pl->fl_wwnn); | |
42e9a92f RL |
1624 | |
1625 | /* | |
3ac6f98f | 1626 | * If the rport was just created, possibly due to the incoming PLOGI, |
42e9a92f RL |
1627 | * set the state appropriately and accept the PLOGI. |
1628 | * | |
1629 | * If we had also sent a PLOGI, and if the received PLOGI is from a | |
1630 | * higher WWPN, we accept it, otherwise an LS_RJT is sent with reason | |
1631 | * "command already in progress". | |
1632 | * | |
1633 | * XXX TBD: If the session was ready before, the PLOGI should result in | |
1634 | * all outstanding exchanges being reset. | |
1635 | */ | |
1636 | switch (rdata->rp_state) { | |
1637 | case RPORT_ST_INIT: | |
3ac6f98f | 1638 | FC_RPORT_DBG(rdata, "Received PLOGI in INIT state\n"); |
42e9a92f | 1639 | break; |
a7b12a27 JE |
1640 | case RPORT_ST_PLOGI_WAIT: |
1641 | FC_RPORT_DBG(rdata, "Received PLOGI in PLOGI_WAIT state\n"); | |
1642 | break; | |
42e9a92f | 1643 | case RPORT_ST_PLOGI: |
3ac6f98f JE |
1644 | FC_RPORT_DBG(rdata, "Received PLOGI in PLOGI state\n"); |
1645 | if (rdata->ids.port_name < lport->wwpn) { | |
1646 | mutex_unlock(&rdata->rp_mutex); | |
1647 | rjt_data.reason = ELS_RJT_INPROG; | |
1648 | rjt_data.explan = ELS_EXPL_NONE; | |
1649 | goto reject; | |
1650 | } | |
42e9a92f RL |
1651 | break; |
1652 | case RPORT_ST_PRLI: | |
b4a9c7ed | 1653 | case RPORT_ST_RTV: |
42e9a92f | 1654 | case RPORT_ST_READY: |
370c3bd0 JE |
1655 | case RPORT_ST_ADISC: |
1656 | FC_RPORT_DBG(rdata, "Received PLOGI in logged-in state %d " | |
1657 | "- ignored for now\n", rdata->rp_state); | |
1658 | /* XXX TBD - should reset */ | |
42e9a92f | 1659 | break; |
a7b12a27 | 1660 | case RPORT_ST_FLOGI: |
14194054 | 1661 | case RPORT_ST_DELETE: |
b4a9c7ed JE |
1662 | FC_RPORT_DBG(rdata, "Received PLOGI in state %s - send busy\n", |
1663 | fc_rport_state(rdata)); | |
1664 | mutex_unlock(&rdata->rp_mutex); | |
1665 | rjt_data.reason = ELS_RJT_BUSY; | |
1666 | rjt_data.explan = ELS_EXPL_NONE; | |
1667 | goto reject; | |
42e9a92f | 1668 | } |
e0335f67 MR |
1669 | if (!fc_rport_compatible_roles(lport, rdata)) { |
1670 | FC_RPORT_DBG(rdata, "Received PLOGI for incompatible role\n"); | |
1671 | mutex_unlock(&rdata->rp_mutex); | |
1672 | rjt_data.reason = ELS_RJT_LOGIC; | |
1673 | rjt_data.explan = ELS_EXPL_NONE; | |
1674 | goto reject; | |
1675 | } | |
42e9a92f | 1676 | |
3ac6f98f JE |
1677 | /* |
1678 | * Get session payload size from incoming PLOGI. | |
1679 | */ | |
1680 | rdata->maxframe_size = fc_plogi_get_maxframe(pl, lport->mfs); | |
3ac6f98f JE |
1681 | |
1682 | /* | |
1683 | * Send LS_ACC. If this fails, the originator should retry. | |
1684 | */ | |
3ac6f98f JE |
1685 | fp = fc_frame_alloc(lport, sizeof(*pl)); |
1686 | if (!fp) | |
1687 | goto out; | |
1688 | ||
1689 | fc_plogi_fill(lport, fp, ELS_LS_ACC); | |
24f089e2 JE |
1690 | fc_fill_reply_hdr(fp, rx_fp, FC_RCTL_ELS_REP, 0); |
1691 | lport->tt.frame_send(lport, fp); | |
3ac6f98f JE |
1692 | fc_rport_enter_prli(rdata); |
1693 | out: | |
1694 | mutex_unlock(&rdata->rp_mutex); | |
24f089e2 | 1695 | fc_frame_free(rx_fp); |
3ac6f98f JE |
1696 | return; |
1697 | ||
1698 | reject: | |
92261156 | 1699 | lport->tt.seq_els_rsp_send(fp, ELS_LS_RJT, &rjt_data); |
3ac6f98f | 1700 | fc_frame_free(fp); |
42e9a92f RL |
1701 | } |
1702 | ||
1703 | /** | |
3a3b42bf RL |
1704 | * fc_rport_recv_prli_req() - Handler for process login (PRLI) requests |
1705 | * @rdata: The remote port that sent the PRLI request | |
3a3b42bf | 1706 | * @rx_fp: The PRLI request frame |
42e9a92f RL |
1707 | * |
1708 | * Locking Note: The rport lock is exected to be held before calling | |
1709 | * this function. | |
1710 | */ | |
9fb9d328 | 1711 | static void fc_rport_recv_prli_req(struct fc_rport_priv *rdata, |
92261156 | 1712 | struct fc_frame *rx_fp) |
42e9a92f | 1713 | { |
42e9a92f | 1714 | struct fc_lport *lport = rdata->local_port; |
42e9a92f | 1715 | struct fc_frame *fp; |
42e9a92f RL |
1716 | struct { |
1717 | struct fc_els_prli prli; | |
1718 | struct fc_els_spp spp; | |
1719 | } *pp; | |
1720 | struct fc_els_spp *rspp; /* request service param page */ | |
1721 | struct fc_els_spp *spp; /* response spp */ | |
1722 | unsigned int len; | |
1723 | unsigned int plen; | |
42e9a92f | 1724 | enum fc_els_spp_resp resp; |
96ad8464 | 1725 | enum fc_els_spp_resp passive; |
42e9a92f | 1726 | struct fc_seq_els_data rjt_data; |
96ad8464 | 1727 | struct fc4_prov *prov; |
42e9a92f | 1728 | |
9fb9d328 JE |
1729 | FC_RPORT_DBG(rdata, "Received PRLI request while in state %s\n", |
1730 | fc_rport_state(rdata)); | |
42e9a92f | 1731 | |
251748a9 | 1732 | len = fr_len(rx_fp) - sizeof(struct fc_frame_header); |
42e9a92f | 1733 | pp = fc_frame_payload_get(rx_fp, sizeof(*pp)); |
a2f6a024 JE |
1734 | if (!pp) |
1735 | goto reject_len; | |
1736 | plen = ntohs(pp->prli.prli_len); | |
1737 | if ((plen % 4) != 0 || plen > len || plen < 16) | |
1738 | goto reject_len; | |
1739 | if (plen < len) | |
1740 | len = plen; | |
1741 | plen = pp->prli.prli_spp_len; | |
1742 | if ((plen % 4) != 0 || plen < sizeof(*spp) || | |
1743 | plen > len || len < sizeof(*pp) || plen < 12) | |
1744 | goto reject_len; | |
1745 | rspp = &pp->spp; | |
1746 | ||
1747 | fp = fc_frame_alloc(lport, len); | |
1748 | if (!fp) { | |
1749 | rjt_data.reason = ELS_RJT_UNAB; | |
1750 | rjt_data.explan = ELS_EXPL_INSUF_RES; | |
1751 | goto reject; | |
42e9a92f | 1752 | } |
a2f6a024 JE |
1753 | pp = fc_frame_payload_get(fp, len); |
1754 | WARN_ON(!pp); | |
1755 | memset(pp, 0, len); | |
1756 | pp->prli.prli_cmd = ELS_LS_ACC; | |
1757 | pp->prli.prli_spp_len = plen; | |
1758 | pp->prli.prli_len = htons(len); | |
1759 | len -= sizeof(struct fc_els_prli); | |
42e9a92f | 1760 | |
a2f6a024 JE |
1761 | /* |
1762 | * Go through all the service parameter pages and build | |
1763 | * response. If plen indicates longer SPP than standard, | |
1764 | * use that. The entire response has been pre-cleared above. | |
1765 | */ | |
1766 | spp = &pp->spp; | |
96ad8464 | 1767 | mutex_lock(&fc_prov_mutex); |
a2f6a024 | 1768 | while (len >= plen) { |
75a2792d | 1769 | rdata->spp_type = rspp->spp_type; |
a2f6a024 JE |
1770 | spp->spp_type = rspp->spp_type; |
1771 | spp->spp_type_ext = rspp->spp_type_ext; | |
96ad8464 JE |
1772 | resp = 0; |
1773 | ||
1774 | if (rspp->spp_type < FC_FC4_PROV_SIZE) { | |
1775 | prov = fc_active_prov[rspp->spp_type]; | |
1776 | if (prov) | |
1777 | resp = prov->prli(rdata, plen, rspp, spp); | |
1778 | prov = fc_passive_prov[rspp->spp_type]; | |
1779 | if (prov) { | |
1780 | passive = prov->prli(rdata, plen, rspp, spp); | |
1781 | if (!resp || passive == FC_SPP_RESP_ACK) | |
1782 | resp = passive; | |
1783 | } | |
1784 | } | |
1785 | if (!resp) { | |
1786 | if (spp->spp_flags & FC_SPP_EST_IMG_PAIR) | |
1787 | resp |= FC_SPP_RESP_CONF; | |
1788 | else | |
1789 | resp |= FC_SPP_RESP_INVL; | |
42e9a92f | 1790 | } |
a2f6a024 JE |
1791 | spp->spp_flags |= resp; |
1792 | len -= plen; | |
1793 | rspp = (struct fc_els_spp *)((char *)rspp + plen); | |
1794 | spp = (struct fc_els_spp *)((char *)spp + plen); | |
1795 | } | |
96ad8464 | 1796 | mutex_unlock(&fc_prov_mutex); |
a2f6a024 JE |
1797 | |
1798 | /* | |
1799 | * Send LS_ACC. If this fails, the originator should retry. | |
1800 | */ | |
24f089e2 JE |
1801 | fc_fill_reply_hdr(fp, rx_fp, FC_RCTL_ELS_REP, 0); |
1802 | lport->tt.frame_send(lport, fp); | |
a2f6a024 JE |
1803 | |
1804 | switch (rdata->rp_state) { | |
1805 | case RPORT_ST_PRLI: | |
1806 | fc_rport_enter_ready(rdata); | |
1807 | break; | |
1808 | default: | |
1809 | break; | |
42e9a92f | 1810 | } |
a2f6a024 JE |
1811 | goto drop; |
1812 | ||
1813 | reject_len: | |
1814 | rjt_data.reason = ELS_RJT_PROT; | |
1815 | rjt_data.explan = ELS_EXPL_INV_LEN; | |
1816 | reject: | |
92261156 | 1817 | lport->tt.seq_els_rsp_send(rx_fp, ELS_LS_RJT, &rjt_data); |
a2f6a024 | 1818 | drop: |
42e9a92f RL |
1819 | fc_frame_free(rx_fp); |
1820 | } | |
1821 | ||
1822 | /** | |
3a3b42bf RL |
1823 | * fc_rport_recv_prlo_req() - Handler for process logout (PRLO) requests |
1824 | * @rdata: The remote port that sent the PRLO request | |
f8fc6c2c | 1825 | * @rx_fp: The PRLO request frame |
42e9a92f RL |
1826 | * |
1827 | * Locking Note: The rport lock is exected to be held before calling | |
1828 | * this function. | |
1829 | */ | |
9fb9d328 | 1830 | static void fc_rport_recv_prlo_req(struct fc_rport_priv *rdata, |
f8fc6c2c | 1831 | struct fc_frame *rx_fp) |
42e9a92f | 1832 | { |
42e9a92f | 1833 | struct fc_lport *lport = rdata->local_port; |
f8fc6c2c BPG |
1834 | struct fc_frame *fp; |
1835 | struct { | |
1836 | struct fc_els_prlo prlo; | |
1837 | struct fc_els_spp spp; | |
1838 | } *pp; | |
1839 | struct fc_els_spp *rspp; /* request service param page */ | |
1840 | struct fc_els_spp *spp; /* response spp */ | |
1841 | unsigned int len; | |
1842 | unsigned int plen; | |
42e9a92f RL |
1843 | struct fc_seq_els_data rjt_data; |
1844 | ||
9fb9d328 JE |
1845 | FC_RPORT_DBG(rdata, "Received PRLO request while in state %s\n", |
1846 | fc_rport_state(rdata)); | |
42e9a92f | 1847 | |
251748a9 | 1848 | len = fr_len(rx_fp) - sizeof(struct fc_frame_header); |
f8fc6c2c BPG |
1849 | pp = fc_frame_payload_get(rx_fp, sizeof(*pp)); |
1850 | if (!pp) | |
1851 | goto reject_len; | |
1852 | plen = ntohs(pp->prlo.prlo_len); | |
1853 | if (plen != 20) | |
1854 | goto reject_len; | |
1855 | if (plen < len) | |
1856 | len = plen; | |
1857 | ||
1858 | rspp = &pp->spp; | |
1859 | ||
1860 | fp = fc_frame_alloc(lport, len); | |
1861 | if (!fp) { | |
1862 | rjt_data.reason = ELS_RJT_UNAB; | |
1863 | rjt_data.explan = ELS_EXPL_INSUF_RES; | |
1864 | goto reject; | |
1865 | } | |
1866 | ||
f8fc6c2c BPG |
1867 | pp = fc_frame_payload_get(fp, len); |
1868 | WARN_ON(!pp); | |
1869 | memset(pp, 0, len); | |
1870 | pp->prlo.prlo_cmd = ELS_LS_ACC; | |
1871 | pp->prlo.prlo_obs = 0x10; | |
1872 | pp->prlo.prlo_len = htons(len); | |
1873 | spp = &pp->spp; | |
1874 | spp->spp_type = rspp->spp_type; | |
1875 | spp->spp_type_ext = rspp->spp_type_ext; | |
1876 | spp->spp_flags = FC_SPP_RESP_ACK; | |
1877 | ||
1878 | fc_rport_enter_delete(rdata, RPORT_EV_LOGO); | |
1879 | ||
92261156 JE |
1880 | fc_fill_reply_hdr(fp, rx_fp, FC_RCTL_ELS_REP, 0); |
1881 | lport->tt.frame_send(lport, fp); | |
f8fc6c2c BPG |
1882 | goto drop; |
1883 | ||
1884 | reject_len: | |
1885 | rjt_data.reason = ELS_RJT_PROT; | |
1886 | rjt_data.explan = ELS_EXPL_INV_LEN; | |
1887 | reject: | |
92261156 | 1888 | lport->tt.seq_els_rsp_send(rx_fp, ELS_LS_RJT, &rjt_data); |
f8fc6c2c BPG |
1889 | drop: |
1890 | fc_frame_free(rx_fp); | |
42e9a92f RL |
1891 | } |
1892 | ||
1893 | /** | |
3a3b42bf RL |
1894 | * fc_rport_recv_logo_req() - Handler for logout (LOGO) requests |
1895 | * @lport: The local port that received the LOGO request | |
3a3b42bf | 1896 | * @fp: The LOGO request frame |
42e9a92f RL |
1897 | * |
1898 | * Locking Note: The rport lock is exected to be held before calling | |
1899 | * this function. | |
1900 | */ | |
92261156 | 1901 | static void fc_rport_recv_logo_req(struct fc_lport *lport, struct fc_frame *fp) |
42e9a92f | 1902 | { |
83fe6a93 JE |
1903 | struct fc_rport_priv *rdata; |
1904 | u32 sid; | |
42e9a92f | 1905 | |
92261156 | 1906 | lport->tt.seq_els_rsp_send(fp, ELS_LS_ACC, NULL); |
feab4ae7 | 1907 | |
251748a9 | 1908 | sid = fc_frame_sid(fp); |
42e9a92f | 1909 | |
83fe6a93 JE |
1910 | mutex_lock(&lport->disc.disc_mutex); |
1911 | rdata = lport->tt.rport_lookup(lport, sid); | |
1912 | if (rdata) { | |
1913 | mutex_lock(&rdata->rp_mutex); | |
1914 | FC_RPORT_DBG(rdata, "Received LOGO request while in state %s\n", | |
1915 | fc_rport_state(rdata)); | |
feab4ae7 | 1916 | |
b4a9c7ed | 1917 | fc_rport_enter_delete(rdata, RPORT_EV_LOGO); |
83fe6a93 JE |
1918 | mutex_unlock(&rdata->rp_mutex); |
1919 | } else | |
1920 | FC_RPORT_ID_DBG(lport, sid, | |
1921 | "Received LOGO from non-logged-in port\n"); | |
1922 | mutex_unlock(&lport->disc.disc_mutex); | |
42e9a92f RL |
1923 | fc_frame_free(fp); |
1924 | } | |
1925 | ||
3a3b42bf RL |
1926 | /** |
1927 | * fc_rport_flush_queue() - Flush the rport_event_queue | |
1928 | */ | |
42e9a92f RL |
1929 | static void fc_rport_flush_queue(void) |
1930 | { | |
1931 | flush_workqueue(rport_event_queue); | |
1932 | } | |
1933 | ||
3a3b42bf RL |
1934 | /** |
1935 | * fc_rport_init() - Initialize the remote port layer for a local port | |
1936 | * @lport: The local port to initialize the remote port layer for | |
1937 | */ | |
42e9a92f RL |
1938 | int fc_rport_init(struct fc_lport *lport) |
1939 | { | |
8025b5db JE |
1940 | if (!lport->tt.rport_lookup) |
1941 | lport->tt.rport_lookup = fc_rport_lookup; | |
1942 | ||
5101ff99 | 1943 | if (!lport->tt.rport_create) |
9e9d0452 | 1944 | lport->tt.rport_create = fc_rport_create; |
5101ff99 | 1945 | |
42e9a92f RL |
1946 | if (!lport->tt.rport_login) |
1947 | lport->tt.rport_login = fc_rport_login; | |
1948 | ||
1949 | if (!lport->tt.rport_logoff) | |
1950 | lport->tt.rport_logoff = fc_rport_logoff; | |
1951 | ||
1952 | if (!lport->tt.rport_recv_req) | |
1953 | lport->tt.rport_recv_req = fc_rport_recv_req; | |
1954 | ||
1955 | if (!lport->tt.rport_flush_queue) | |
1956 | lport->tt.rport_flush_queue = fc_rport_flush_queue; | |
1957 | ||
f211fa51 JE |
1958 | if (!lport->tt.rport_destroy) |
1959 | lport->tt.rport_destroy = fc_rport_destroy; | |
1960 | ||
42e9a92f RL |
1961 | return 0; |
1962 | } | |
1963 | EXPORT_SYMBOL(fc_rport_init); | |
1964 | ||
96ad8464 JE |
1965 | /** |
1966 | * fc_rport_fcp_prli() - Handle incoming PRLI for the FCP initiator. | |
1967 | * @rdata: remote port private | |
1968 | * @spp_len: service parameter page length | |
1969 | * @rspp: received service parameter page | |
1970 | * @spp: response service parameter page | |
1971 | * | |
1972 | * Returns the value for the response code to be placed in spp_flags; | |
1973 | * Returns 0 if not an initiator. | |
1974 | */ | |
1975 | static int fc_rport_fcp_prli(struct fc_rport_priv *rdata, u32 spp_len, | |
1976 | const struct fc_els_spp *rspp, | |
1977 | struct fc_els_spp *spp) | |
1978 | { | |
1979 | struct fc_lport *lport = rdata->local_port; | |
1980 | u32 fcp_parm; | |
1981 | ||
1982 | fcp_parm = ntohl(rspp->spp_params); | |
1983 | rdata->ids.roles = FC_RPORT_ROLE_UNKNOWN; | |
1984 | if (fcp_parm & FCP_SPPF_INIT_FCN) | |
1985 | rdata->ids.roles |= FC_RPORT_ROLE_FCP_INITIATOR; | |
1986 | if (fcp_parm & FCP_SPPF_TARG_FCN) | |
1987 | rdata->ids.roles |= FC_RPORT_ROLE_FCP_TARGET; | |
1988 | if (fcp_parm & FCP_SPPF_RETRY) | |
1989 | rdata->flags |= FC_RP_FLAGS_RETRY; | |
1990 | rdata->supported_classes = FC_COS_CLASS3; | |
1991 | ||
732bdb9d | 1992 | if (!(lport->service_params & FCP_SPPF_INIT_FCN)) |
96ad8464 JE |
1993 | return 0; |
1994 | ||
1995 | spp->spp_flags |= rspp->spp_flags & FC_SPP_EST_IMG_PAIR; | |
1996 | ||
1997 | /* | |
1998 | * OR in our service parameters with other providers (target), if any. | |
1999 | */ | |
2000 | fcp_parm = ntohl(spp->spp_params); | |
2001 | spp->spp_params = htonl(fcp_parm | lport->service_params); | |
2002 | return FC_SPP_RESP_ACK; | |
2003 | } | |
2004 | ||
2005 | /* | |
2006 | * FC-4 provider ops for FCP initiator. | |
2007 | */ | |
2008 | struct fc4_prov fc_rport_fcp_init = { | |
2009 | .prli = fc_rport_fcp_prli, | |
2010 | }; | |
2011 | ||
2012 | /** | |
2013 | * fc_rport_t0_prli() - Handle incoming PRLI parameters for type 0 | |
2014 | * @rdata: remote port private | |
2015 | * @spp_len: service parameter page length | |
2016 | * @rspp: received service parameter page | |
2017 | * @spp: response service parameter page | |
2018 | */ | |
2019 | static int fc_rport_t0_prli(struct fc_rport_priv *rdata, u32 spp_len, | |
2020 | const struct fc_els_spp *rspp, | |
2021 | struct fc_els_spp *spp) | |
2022 | { | |
2023 | if (rspp->spp_flags & FC_SPP_EST_IMG_PAIR) | |
2024 | return FC_SPP_RESP_INVL; | |
2025 | return FC_SPP_RESP_ACK; | |
2026 | } | |
2027 | ||
2028 | /* | |
2029 | * FC-4 provider ops for type 0 service parameters. | |
2030 | * | |
2031 | * This handles the special case of type 0 which is always successful | |
2032 | * but doesn't do anything otherwise. | |
2033 | */ | |
2034 | struct fc4_prov fc_rport_t0_prov = { | |
2035 | .prli = fc_rport_t0_prli, | |
2036 | }; | |
2037 | ||
3a3b42bf RL |
2038 | /** |
2039 | * fc_setup_rport() - Initialize the rport_event_queue | |
2040 | */ | |
55204909 | 2041 | int fc_setup_rport(void) |
42e9a92f RL |
2042 | { |
2043 | rport_event_queue = create_singlethread_workqueue("fc_rport_eq"); | |
2044 | if (!rport_event_queue) | |
2045 | return -ENOMEM; | |
2046 | return 0; | |
2047 | } | |
42e9a92f | 2048 | |
3a3b42bf RL |
2049 | /** |
2050 | * fc_destroy_rport() - Destroy the rport_event_queue | |
2051 | */ | |
55204909 | 2052 | void fc_destroy_rport(void) |
42e9a92f RL |
2053 | { |
2054 | destroy_workqueue(rport_event_queue); | |
2055 | } | |
42e9a92f | 2056 | |
3a3b42bf RL |
2057 | /** |
2058 | * fc_rport_terminate_io() - Stop all outstanding I/O on a remote port | |
2059 | * @rport: The remote port whose I/O should be terminated | |
2060 | */ | |
42e9a92f RL |
2061 | void fc_rport_terminate_io(struct fc_rport *rport) |
2062 | { | |
3a3b42bf RL |
2063 | struct fc_rport_libfc_priv *rpriv = rport->dd_data; |
2064 | struct fc_lport *lport = rpriv->local_port; | |
42e9a92f | 2065 | |
1f6ff364 AJ |
2066 | lport->tt.exch_mgr_reset(lport, 0, rport->port_id); |
2067 | lport->tt.exch_mgr_reset(lport, rport->port_id, 0); | |
42e9a92f RL |
2068 | } |
2069 | EXPORT_SYMBOL(fc_rport_terminate_io); |