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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 | ||
4d2095cc HR |
47 | /* |
48 | * RPORT REFERENCE COUNTING | |
49 | * | |
50 | * A rport reference should be taken when: | |
51 | * - an rport is allocated | |
52 | * - a workqueue item is scheduled | |
53 | * - an ELS request is send | |
54 | * The reference should be dropped when: | |
55 | * - the workqueue function has finished | |
56 | * - the ELS response is handled | |
57 | * - an rport is removed | |
58 | */ | |
59 | ||
42e9a92f RL |
60 | #include <linux/kernel.h> |
61 | #include <linux/spinlock.h> | |
62 | #include <linux/interrupt.h> | |
5a0e3ad6 | 63 | #include <linux/slab.h> |
42e9a92f RL |
64 | #include <linux/rcupdate.h> |
65 | #include <linux/timer.h> | |
66 | #include <linux/workqueue.h> | |
09703660 | 67 | #include <linux/export.h> |
42e9a92f RL |
68 | #include <asm/unaligned.h> |
69 | ||
70 | #include <scsi/libfc.h> | |
71 | #include <scsi/fc_encode.h> | |
72 | ||
8866a5d9 RL |
73 | #include "fc_libfc.h" |
74 | ||
55204909 | 75 | static struct workqueue_struct *rport_event_queue; |
42e9a92f | 76 | |
a7b12a27 | 77 | static void fc_rport_enter_flogi(struct fc_rport_priv *); |
9fb9d328 JE |
78 | static void fc_rport_enter_plogi(struct fc_rport_priv *); |
79 | static void fc_rport_enter_prli(struct fc_rport_priv *); | |
80 | static void fc_rport_enter_rtv(struct fc_rport_priv *); | |
81 | static void fc_rport_enter_ready(struct fc_rport_priv *); | |
82 | static void fc_rport_enter_logo(struct fc_rport_priv *); | |
370c3bd0 | 83 | static void fc_rport_enter_adisc(struct fc_rport_priv *); |
42e9a92f | 84 | |
92261156 JE |
85 | static void fc_rport_recv_plogi_req(struct fc_lport *, struct fc_frame *); |
86 | static void fc_rport_recv_prli_req(struct fc_rport_priv *, struct fc_frame *); | |
87 | static void fc_rport_recv_prlo_req(struct fc_rport_priv *, struct fc_frame *); | |
88 | static void fc_rport_recv_logo_req(struct fc_lport *, struct fc_frame *); | |
42e9a92f | 89 | static void fc_rport_timeout(struct work_struct *); |
9f9504a7 HR |
90 | static void fc_rport_error(struct fc_rport_priv *, int); |
91 | static void fc_rport_error_retry(struct fc_rport_priv *, int); | |
42e9a92f RL |
92 | static void fc_rport_work(struct work_struct *); |
93 | ||
94 | static const char *fc_rport_state_names[] = { | |
42e9a92f | 95 | [RPORT_ST_INIT] = "Init", |
a7b12a27 JE |
96 | [RPORT_ST_FLOGI] = "FLOGI", |
97 | [RPORT_ST_PLOGI_WAIT] = "PLOGI_WAIT", | |
42e9a92f RL |
98 | [RPORT_ST_PLOGI] = "PLOGI", |
99 | [RPORT_ST_PRLI] = "PRLI", | |
100 | [RPORT_ST_RTV] = "RTV", | |
101 | [RPORT_ST_READY] = "Ready", | |
370c3bd0 | 102 | [RPORT_ST_ADISC] = "ADISC", |
14194054 | 103 | [RPORT_ST_DELETE] = "Delete", |
42e9a92f RL |
104 | }; |
105 | ||
8025b5db | 106 | /** |
3a3b42bf RL |
107 | * fc_rport_lookup() - Lookup a remote port by port_id |
108 | * @lport: The local port to lookup the remote port on | |
109 | * @port_id: The remote port ID to look up | |
42e90414 | 110 | * |
baa6719f HR |
111 | * The reference count of the fc_rport_priv structure is |
112 | * increased by one. | |
8025b5db JE |
113 | */ |
114 | static struct fc_rport_priv *fc_rport_lookup(const struct fc_lport *lport, | |
115 | u32 port_id) | |
116 | { | |
baa6719f | 117 | struct fc_rport_priv *rdata = NULL, *tmp_rdata; |
8025b5db | 118 | |
baa6719f HR |
119 | rcu_read_lock(); |
120 | list_for_each_entry_rcu(tmp_rdata, &lport->disc.rports, peers) | |
121 | if (tmp_rdata->ids.port_id == port_id && | |
122 | kref_get_unless_zero(&tmp_rdata->kref)) { | |
123 | rdata = tmp_rdata; | |
124 | break; | |
125 | } | |
126 | rcu_read_unlock(); | |
127 | return rdata; | |
8025b5db JE |
128 | } |
129 | ||
9e9d0452 | 130 | /** |
9737e6a7 | 131 | * fc_rport_create() - Create a new remote port |
3a3b42bf RL |
132 | * @lport: The local port this remote port will be associated with |
133 | * @ids: The identifiers for the new remote port | |
134 | * | |
135 | * The remote port will start in the INIT state. | |
9e9d0452 | 136 | * |
48f00902 | 137 | * Locking note: must be called with the disc_mutex held. |
9e9d0452 JE |
138 | */ |
139 | static struct fc_rport_priv *fc_rport_create(struct fc_lport *lport, | |
9737e6a7 | 140 | u32 port_id) |
42e9a92f | 141 | { |
ab28f1fd | 142 | struct fc_rport_priv *rdata; |
42e9a92f | 143 | |
9737e6a7 | 144 | rdata = lport->tt.rport_lookup(lport, port_id); |
19f97e3c JE |
145 | if (rdata) |
146 | return rdata; | |
147 | ||
f90377ab | 148 | rdata = kzalloc(sizeof(*rdata) + lport->rport_priv_size, GFP_KERNEL); |
9e9d0452 | 149 | if (!rdata) |
42e9a92f RL |
150 | return NULL; |
151 | ||
9737e6a7 RL |
152 | rdata->ids.node_name = -1; |
153 | rdata->ids.port_name = -1; | |
154 | rdata->ids.port_id = port_id; | |
155 | rdata->ids.roles = FC_RPORT_ROLE_UNKNOWN; | |
156 | ||
f211fa51 | 157 | kref_init(&rdata->kref); |
42e9a92f | 158 | mutex_init(&rdata->rp_mutex); |
795d86f5 | 159 | rdata->local_port = lport; |
42e9a92f RL |
160 | rdata->rp_state = RPORT_ST_INIT; |
161 | rdata->event = RPORT_EV_NONE; | |
162 | rdata->flags = FC_RP_FLAGS_REC_SUPPORTED; | |
795d86f5 JE |
163 | rdata->e_d_tov = lport->e_d_tov; |
164 | rdata->r_a_tov = lport->r_a_tov; | |
f211fa51 | 165 | rdata->maxframe_size = FC_MIN_MAX_PAYLOAD; |
42e9a92f RL |
166 | INIT_DELAYED_WORK(&rdata->retry_work, fc_rport_timeout); |
167 | INIT_WORK(&rdata->event_work, fc_rport_work); | |
75a2792d BPG |
168 | if (port_id != FC_FID_DIR_SERV) { |
169 | rdata->lld_event_callback = lport->tt.rport_event_callback; | |
42e90414 | 170 | list_add_rcu(&rdata->peers, &lport->disc.rports); |
75a2792d | 171 | } |
9fb9d328 | 172 | return rdata; |
42e9a92f RL |
173 | } |
174 | ||
f211fa51 | 175 | /** |
3a3b42bf RL |
176 | * fc_rport_destroy() - Free a remote port after last reference is released |
177 | * @kref: The remote port's kref | |
f211fa51 JE |
178 | */ |
179 | static void fc_rport_destroy(struct kref *kref) | |
180 | { | |
181 | struct fc_rport_priv *rdata; | |
f211fa51 JE |
182 | |
183 | rdata = container_of(kref, struct fc_rport_priv, kref); | |
8497a24a | 184 | kfree_rcu(rdata, rcu); |
f211fa51 JE |
185 | } |
186 | ||
42e9a92f | 187 | /** |
3a3b42bf RL |
188 | * fc_rport_state() - Return a string identifying the remote port's state |
189 | * @rdata: The remote port | |
42e9a92f | 190 | */ |
9fb9d328 | 191 | static const char *fc_rport_state(struct fc_rport_priv *rdata) |
42e9a92f RL |
192 | { |
193 | const char *cp; | |
42e9a92f RL |
194 | |
195 | cp = fc_rport_state_names[rdata->rp_state]; | |
196 | if (!cp) | |
197 | cp = "Unknown"; | |
198 | return cp; | |
199 | } | |
200 | ||
201 | /** | |
3a3b42bf RL |
202 | * fc_set_rport_loss_tmo() - Set the remote port loss timeout |
203 | * @rport: The remote port that gets a new timeout value | |
204 | * @timeout: The new timeout value (in seconds) | |
42e9a92f RL |
205 | */ |
206 | void fc_set_rport_loss_tmo(struct fc_rport *rport, u32 timeout) | |
207 | { | |
208 | if (timeout) | |
73b43764 | 209 | rport->dev_loss_tmo = timeout; |
42e9a92f | 210 | else |
73b43764 | 211 | rport->dev_loss_tmo = 1; |
42e9a92f RL |
212 | } |
213 | EXPORT_SYMBOL(fc_set_rport_loss_tmo); | |
214 | ||
215 | /** | |
3a3b42bf RL |
216 | * fc_plogi_get_maxframe() - Get the maximum payload from the common service |
217 | * parameters in a FLOGI frame | |
a7b12a27 | 218 | * @flp: The FLOGI or PLOGI payload |
3a3b42bf RL |
219 | * @maxval: The maximum frame size upper limit; this may be less than what |
220 | * is in the service parameters | |
42e9a92f | 221 | */ |
b2ab99c9 RL |
222 | static unsigned int fc_plogi_get_maxframe(struct fc_els_flogi *flp, |
223 | unsigned int maxval) | |
42e9a92f RL |
224 | { |
225 | unsigned int mfs; | |
226 | ||
227 | /* | |
228 | * Get max payload from the common service parameters and the | |
229 | * class 3 receive data field size. | |
230 | */ | |
231 | mfs = ntohs(flp->fl_csp.sp_bb_data) & FC_SP_BB_DATA_MASK; | |
232 | if (mfs >= FC_SP_MIN_MAX_PAYLOAD && mfs < maxval) | |
233 | maxval = mfs; | |
234 | mfs = ntohs(flp->fl_cssp[3 - 1].cp_rdfs); | |
235 | if (mfs >= FC_SP_MIN_MAX_PAYLOAD && mfs < maxval) | |
236 | maxval = mfs; | |
237 | return maxval; | |
238 | } | |
239 | ||
240 | /** | |
3a3b42bf RL |
241 | * fc_rport_state_enter() - Change the state of a remote port |
242 | * @rdata: The remote port whose state should change | |
243 | * @new: The new state | |
42e9a92f RL |
244 | * |
245 | * Locking Note: Called with the rport lock held | |
246 | */ | |
9fb9d328 | 247 | static void fc_rport_state_enter(struct fc_rport_priv *rdata, |
42e9a92f RL |
248 | enum fc_rport_state new) |
249 | { | |
42e9a92f RL |
250 | if (rdata->rp_state != new) |
251 | rdata->retries = 0; | |
252 | rdata->rp_state = new; | |
253 | } | |
254 | ||
3a3b42bf RL |
255 | /** |
256 | * fc_rport_work() - Handler for remote port events in the rport_event_queue | |
257 | * @work: Handle to the remote port being dequeued | |
4d2095cc HR |
258 | * |
259 | * Reference counting: drops kref on return | |
3a3b42bf | 260 | */ |
42e9a92f RL |
261 | static void fc_rport_work(struct work_struct *work) |
262 | { | |
571f824c | 263 | u32 port_id; |
ab28f1fd JE |
264 | struct fc_rport_priv *rdata = |
265 | container_of(work, struct fc_rport_priv, event_work); | |
3a3b42bf | 266 | struct fc_rport_libfc_priv *rpriv; |
42e9a92f | 267 | enum fc_rport_event event; |
42e9a92f RL |
268 | struct fc_lport *lport = rdata->local_port; |
269 | struct fc_rport_operations *rport_ops; | |
629f4427 | 270 | struct fc_rport_identifiers ids; |
f211fa51 | 271 | struct fc_rport *rport; |
96ad8464 JE |
272 | struct fc4_prov *prov; |
273 | u8 type; | |
42e9a92f RL |
274 | |
275 | mutex_lock(&rdata->rp_mutex); | |
276 | event = rdata->event; | |
277 | rport_ops = rdata->ops; | |
f211fa51 | 278 | rport = rdata->rport; |
42e9a92f | 279 | |
9e9d0452 JE |
280 | FC_RPORT_DBG(rdata, "work event %u\n", event); |
281 | ||
629f4427 | 282 | switch (event) { |
4c0f62b5 | 283 | case RPORT_EV_READY: |
f211fa51 | 284 | ids = rdata->ids; |
5f7ea3b7 | 285 | rdata->event = RPORT_EV_NONE; |
f034260d | 286 | rdata->major_retries = 0; |
9e9d0452 | 287 | kref_get(&rdata->kref); |
42e9a92f RL |
288 | mutex_unlock(&rdata->rp_mutex); |
289 | ||
57d3ec7e HR |
290 | if (!rport) { |
291 | FC_RPORT_DBG(rdata, "No rport!\n"); | |
9e9d0452 | 292 | rport = fc_remote_port_add(lport->host, 0, &ids); |
57d3ec7e | 293 | } |
9e9d0452 JE |
294 | if (!rport) { |
295 | FC_RPORT_DBG(rdata, "Failed to add the rport\n"); | |
296 | lport->tt.rport_logoff(rdata); | |
297 | kref_put(&rdata->kref, lport->tt.rport_destroy); | |
298 | return; | |
42e9a92f | 299 | } |
9e9d0452 JE |
300 | mutex_lock(&rdata->rp_mutex); |
301 | if (rdata->rport) | |
302 | FC_RPORT_DBG(rdata, "rport already allocated\n"); | |
303 | rdata->rport = rport; | |
304 | rport->maxframe_size = rdata->maxframe_size; | |
305 | rport->supported_classes = rdata->supported_classes; | |
306 | ||
3a3b42bf RL |
307 | rpriv = rport->dd_data; |
308 | rpriv->local_port = lport; | |
309 | rpriv->rp_state = rdata->rp_state; | |
310 | rpriv->flags = rdata->flags; | |
311 | rpriv->e_d_tov = rdata->e_d_tov; | |
312 | rpriv->r_a_tov = rdata->r_a_tov; | |
9e9d0452 JE |
313 | mutex_unlock(&rdata->rp_mutex); |
314 | ||
8345592b | 315 | if (rport_ops && rport_ops->event_callback) { |
9e9d0452 | 316 | FC_RPORT_DBG(rdata, "callback ev %d\n", event); |
9fb9d328 | 317 | rport_ops->event_callback(lport, rdata, event); |
9e9d0452 | 318 | } |
75a2792d BPG |
319 | if (rdata->lld_event_callback) { |
320 | FC_RPORT_DBG(rdata, "lld callback ev %d\n", event); | |
321 | rdata->lld_event_callback(lport, rdata, event); | |
322 | } | |
9e9d0452 | 323 | kref_put(&rdata->kref, lport->tt.rport_destroy); |
629f4427 JE |
324 | break; |
325 | ||
326 | case RPORT_EV_FAILED: | |
327 | case RPORT_EV_LOGO: | |
328 | case RPORT_EV_STOP: | |
96ad8464 JE |
329 | if (rdata->prli_count) { |
330 | mutex_lock(&fc_prov_mutex); | |
331 | for (type = 1; type < FC_FC4_PROV_SIZE; type++) { | |
332 | prov = fc_passive_prov[type]; | |
333 | if (prov && prov->prlo) | |
334 | prov->prlo(rdata); | |
335 | } | |
336 | mutex_unlock(&fc_prov_mutex); | |
337 | } | |
9e9d0452 | 338 | port_id = rdata->ids.port_id; |
42e9a92f | 339 | mutex_unlock(&rdata->rp_mutex); |
9e9d0452 | 340 | |
8345592b | 341 | if (rport_ops && rport_ops->event_callback) { |
9e9d0452 | 342 | FC_RPORT_DBG(rdata, "callback ev %d\n", event); |
9fb9d328 | 343 | rport_ops->event_callback(lport, rdata, event); |
9e9d0452 | 344 | } |
75a2792d BPG |
345 | if (rdata->lld_event_callback) { |
346 | FC_RPORT_DBG(rdata, "lld callback ev %d\n", event); | |
347 | rdata->lld_event_callback(lport, rdata, event); | |
348 | } | |
4d2095cc HR |
349 | if (cancel_delayed_work_sync(&rdata->retry_work)) |
350 | kref_put(&rdata->kref, lport->tt.rport_destroy); | |
9e9d0452 JE |
351 | |
352 | /* | |
353 | * Reset any outstanding exchanges before freeing rport. | |
354 | */ | |
355 | lport->tt.exch_mgr_reset(lport, 0, port_id); | |
356 | lport->tt.exch_mgr_reset(lport, port_id, 0); | |
357 | ||
358 | if (rport) { | |
3a3b42bf RL |
359 | rpriv = rport->dd_data; |
360 | rpriv->rp_state = RPORT_ST_DELETE; | |
9e9d0452 JE |
361 | mutex_lock(&rdata->rp_mutex); |
362 | rdata->rport = NULL; | |
363 | mutex_unlock(&rdata->rp_mutex); | |
42e9a92f | 364 | fc_remote_port_delete(rport); |
571f824c | 365 | } |
4b2164d4 | 366 | |
4b2164d4 JE |
367 | mutex_lock(&rdata->rp_mutex); |
368 | if (rdata->rp_state == RPORT_ST_DELETE) { | |
369 | if (port_id == FC_FID_DIR_SERV) { | |
370 | rdata->event = RPORT_EV_NONE; | |
371 | mutex_unlock(&rdata->rp_mutex); | |
fe5e3f1a | 372 | kref_put(&rdata->kref, lport->tt.rport_destroy); |
f034260d JE |
373 | } else if ((rdata->flags & FC_RP_STARTED) && |
374 | rdata->major_retries < | |
375 | lport->max_rport_retry_count) { | |
376 | rdata->major_retries++; | |
4b2164d4 JE |
377 | rdata->event = RPORT_EV_NONE; |
378 | FC_RPORT_DBG(rdata, "work restart\n"); | |
a7b12a27 | 379 | fc_rport_enter_flogi(rdata); |
4b2164d4 JE |
380 | mutex_unlock(&rdata->rp_mutex); |
381 | } else { | |
382 | FC_RPORT_DBG(rdata, "work delete\n"); | |
a407c593 | 383 | mutex_lock(&lport->disc.disc_mutex); |
42e90414 | 384 | list_del_rcu(&rdata->peers); |
a407c593 | 385 | mutex_unlock(&lport->disc.disc_mutex); |
4b2164d4 JE |
386 | mutex_unlock(&rdata->rp_mutex); |
387 | kref_put(&rdata->kref, lport->tt.rport_destroy); | |
388 | } | |
389 | } else { | |
390 | /* | |
391 | * Re-open for events. Reissue READY event if ready. | |
392 | */ | |
393 | rdata->event = RPORT_EV_NONE; | |
57d3ec7e HR |
394 | if (rdata->rp_state == RPORT_ST_READY) { |
395 | FC_RPORT_DBG(rdata, "work reopen\n"); | |
4b2164d4 | 396 | fc_rport_enter_ready(rdata); |
57d3ec7e | 397 | } |
b4a9c7ed | 398 | mutex_unlock(&rdata->rp_mutex); |
4b2164d4 | 399 | } |
629f4427 JE |
400 | break; |
401 | ||
402 | default: | |
42e9a92f | 403 | mutex_unlock(&rdata->rp_mutex); |
629f4427 JE |
404 | break; |
405 | } | |
4d2095cc | 406 | kref_put(&rdata->kref, lport->tt.rport_destroy); |
42e9a92f RL |
407 | } |
408 | ||
409 | /** | |
34f42a07 | 410 | * fc_rport_login() - Start the remote port login state machine |
3a3b42bf | 411 | * @rdata: The remote port to be logged in to |
42e9a92f RL |
412 | * |
413 | * Locking Note: Called without the rport lock held. This | |
414 | * function will hold the rport lock, call an _enter_* | |
415 | * function and then unlock the rport. | |
370c3bd0 JE |
416 | * |
417 | * This indicates the intent to be logged into the remote port. | |
418 | * If it appears we are already logged in, ADISC is used to verify | |
419 | * the setup. | |
42e9a92f | 420 | */ |
c6b21c93 | 421 | static int fc_rport_login(struct fc_rport_priv *rdata) |
42e9a92f | 422 | { |
42e9a92f RL |
423 | mutex_lock(&rdata->rp_mutex); |
424 | ||
06ee2571 HR |
425 | if (rdata->flags & FC_RP_STARTED) { |
426 | FC_RPORT_DBG(rdata, "port already started\n"); | |
427 | mutex_unlock(&rdata->rp_mutex); | |
428 | return 0; | |
429 | } | |
430 | ||
4b2164d4 | 431 | rdata->flags |= FC_RP_STARTED; |
370c3bd0 JE |
432 | switch (rdata->rp_state) { |
433 | case RPORT_ST_READY: | |
434 | FC_RPORT_DBG(rdata, "ADISC port\n"); | |
435 | fc_rport_enter_adisc(rdata); | |
436 | break; | |
b4a9c7ed JE |
437 | case RPORT_ST_DELETE: |
438 | FC_RPORT_DBG(rdata, "Restart deleted port\n"); | |
b4a9c7ed | 439 | break; |
e5a20009 | 440 | case RPORT_ST_INIT: |
370c3bd0 | 441 | FC_RPORT_DBG(rdata, "Login to port\n"); |
a7b12a27 | 442 | fc_rport_enter_flogi(rdata); |
370c3bd0 | 443 | break; |
e5a20009 HR |
444 | default: |
445 | FC_RPORT_DBG(rdata, "Login in progress, state %s\n", | |
446 | fc_rport_state(rdata)); | |
447 | break; | |
370c3bd0 | 448 | } |
42e9a92f RL |
449 | mutex_unlock(&rdata->rp_mutex); |
450 | ||
451 | return 0; | |
452 | } | |
453 | ||
5f7ea3b7 | 454 | /** |
3a3b42bf RL |
455 | * fc_rport_enter_delete() - Schedule a remote port to be deleted |
456 | * @rdata: The remote port to be deleted | |
457 | * @event: The event to report as the reason for deletion | |
5f7ea3b7 JE |
458 | * |
459 | * Locking Note: Called with the rport lock held. | |
460 | * | |
461 | * Allow state change into DELETE only once. | |
462 | * | |
463 | * Call queue_work only if there's no event already pending. | |
464 | * Set the new event so that the old pending event will not occur. | |
465 | * Since we have the mutex, even if fc_rport_work() is already started, | |
466 | * it'll see the new event. | |
4d2095cc HR |
467 | * |
468 | * Reference counting: does not modify kref | |
5f7ea3b7 | 469 | */ |
9fb9d328 | 470 | static void fc_rport_enter_delete(struct fc_rport_priv *rdata, |
5f7ea3b7 JE |
471 | enum fc_rport_event event) |
472 | { | |
4d2095cc HR |
473 | struct fc_lport *lport = rdata->local_port; |
474 | ||
5f7ea3b7 JE |
475 | if (rdata->rp_state == RPORT_ST_DELETE) |
476 | return; | |
477 | ||
9fb9d328 | 478 | FC_RPORT_DBG(rdata, "Delete port\n"); |
5f7ea3b7 | 479 | |
9fb9d328 | 480 | fc_rport_state_enter(rdata, RPORT_ST_DELETE); |
5f7ea3b7 | 481 | |
4d2095cc HR |
482 | kref_get(&rdata->kref); |
483 | if (rdata->event == RPORT_EV_NONE && | |
484 | !queue_work(rport_event_queue, &rdata->event_work)) | |
485 | kref_put(&rdata->kref, lport->tt.rport_destroy); | |
486 | ||
5f7ea3b7 JE |
487 | rdata->event = event; |
488 | } | |
489 | ||
42e9a92f | 490 | /** |
3a3b42bf RL |
491 | * fc_rport_logoff() - Logoff and remove a remote port |
492 | * @rdata: The remote port to be logged off of | |
42e9a92f RL |
493 | * |
494 | * Locking Note: Called without the rport lock held. This | |
495 | * function will hold the rport lock, call an _enter_* | |
496 | * function and then unlock the rport. | |
497 | */ | |
c6b21c93 | 498 | static int fc_rport_logoff(struct fc_rport_priv *rdata) |
42e9a92f | 499 | { |
649eb869 HR |
500 | struct fc_lport *lport = rdata->local_port; |
501 | u32 port_id = rdata->ids.port_id; | |
502 | ||
42e9a92f RL |
503 | mutex_lock(&rdata->rp_mutex); |
504 | ||
9fb9d328 | 505 | FC_RPORT_DBG(rdata, "Remove port\n"); |
42e9a92f | 506 | |
4b2164d4 | 507 | rdata->flags &= ~FC_RP_STARTED; |
14194054 | 508 | if (rdata->rp_state == RPORT_ST_DELETE) { |
9fb9d328 | 509 | FC_RPORT_DBG(rdata, "Port in Delete state, not removing\n"); |
b4c6f546 AJ |
510 | goto out; |
511 | } | |
649eb869 HR |
512 | /* |
513 | * FC-LS states: | |
514 | * To explicitly Logout, the initiating Nx_Port shall terminate | |
515 | * other open Sequences that it initiated with the destination | |
516 | * Nx_Port prior to performing Logout. | |
517 | */ | |
518 | lport->tt.exch_mgr_reset(lport, 0, port_id); | |
519 | lport->tt.exch_mgr_reset(lport, port_id, 0); | |
520 | ||
4b2164d4 | 521 | fc_rport_enter_logo(rdata); |
42e9a92f RL |
522 | |
523 | /* | |
14194054 | 524 | * Change the state to Delete so that we discard |
42e9a92f RL |
525 | * the response. |
526 | */ | |
9fb9d328 | 527 | fc_rport_enter_delete(rdata, RPORT_EV_STOP); |
b4c6f546 | 528 | out: |
b4a9c7ed | 529 | mutex_unlock(&rdata->rp_mutex); |
42e9a92f RL |
530 | return 0; |
531 | } | |
532 | ||
533 | /** | |
3a3b42bf RL |
534 | * fc_rport_enter_ready() - Transition to the RPORT_ST_READY state |
535 | * @rdata: The remote port that is ready | |
42e9a92f RL |
536 | * |
537 | * Locking Note: The rport lock is expected to be held before calling | |
538 | * this routine. | |
4d2095cc HR |
539 | * |
540 | * Reference counting: schedules workqueue, does not modify kref | |
42e9a92f | 541 | */ |
9fb9d328 | 542 | static void fc_rport_enter_ready(struct fc_rport_priv *rdata) |
42e9a92f | 543 | { |
4d2095cc HR |
544 | struct fc_lport *lport = rdata->local_port; |
545 | ||
9fb9d328 | 546 | fc_rport_state_enter(rdata, RPORT_ST_READY); |
42e9a92f | 547 | |
9fb9d328 | 548 | FC_RPORT_DBG(rdata, "Port is Ready\n"); |
42e9a92f | 549 | |
4d2095cc HR |
550 | kref_get(&rdata->kref); |
551 | if (rdata->event == RPORT_EV_NONE && | |
552 | !queue_work(rport_event_queue, &rdata->event_work)) | |
553 | kref_put(&rdata->kref, lport->tt.rport_destroy); | |
554 | ||
4c0f62b5 | 555 | rdata->event = RPORT_EV_READY; |
42e9a92f RL |
556 | } |
557 | ||
558 | /** | |
3a3b42bf RL |
559 | * fc_rport_timeout() - Handler for the retry_work timer |
560 | * @work: Handle to the remote port that has timed out | |
42e9a92f RL |
561 | * |
562 | * Locking Note: Called without the rport lock held. This | |
563 | * function will hold the rport lock, call an _enter_* | |
564 | * function and then unlock the rport. | |
4d2095cc HR |
565 | * |
566 | * Reference counting: Drops kref on return. | |
42e9a92f RL |
567 | */ |
568 | static void fc_rport_timeout(struct work_struct *work) | |
569 | { | |
ab28f1fd JE |
570 | struct fc_rport_priv *rdata = |
571 | container_of(work, struct fc_rport_priv, retry_work.work); | |
4d2095cc | 572 | struct fc_lport *lport = rdata->local_port; |
42e9a92f RL |
573 | |
574 | mutex_lock(&rdata->rp_mutex); | |
57d3ec7e | 575 | FC_RPORT_DBG(rdata, "Port timeout, state %s\n", fc_rport_state(rdata)); |
42e9a92f RL |
576 | |
577 | switch (rdata->rp_state) { | |
a7b12a27 JE |
578 | case RPORT_ST_FLOGI: |
579 | fc_rport_enter_flogi(rdata); | |
580 | break; | |
42e9a92f | 581 | case RPORT_ST_PLOGI: |
9fb9d328 | 582 | fc_rport_enter_plogi(rdata); |
42e9a92f RL |
583 | break; |
584 | case RPORT_ST_PRLI: | |
9fb9d328 | 585 | fc_rport_enter_prli(rdata); |
42e9a92f RL |
586 | break; |
587 | case RPORT_ST_RTV: | |
9fb9d328 | 588 | fc_rport_enter_rtv(rdata); |
42e9a92f | 589 | break; |
370c3bd0 JE |
590 | case RPORT_ST_ADISC: |
591 | fc_rport_enter_adisc(rdata); | |
592 | break; | |
a7b12a27 | 593 | case RPORT_ST_PLOGI_WAIT: |
42e9a92f RL |
594 | case RPORT_ST_READY: |
595 | case RPORT_ST_INIT: | |
14194054 | 596 | case RPORT_ST_DELETE: |
42e9a92f RL |
597 | break; |
598 | } | |
599 | ||
600 | mutex_unlock(&rdata->rp_mutex); | |
4d2095cc | 601 | kref_put(&rdata->kref, lport->tt.rport_destroy); |
42e9a92f RL |
602 | } |
603 | ||
604 | /** | |
34f42a07 | 605 | * fc_rport_error() - Error handler, called once retries have been exhausted |
3a3b42bf | 606 | * @rdata: The remote port the error is happened on |
9f9504a7 | 607 | * @err: The error code |
42e9a92f | 608 | * |
42e9a92f RL |
609 | * Locking Note: The rport lock is expected to be held before |
610 | * calling this routine | |
4d2095cc HR |
611 | * |
612 | * Reference counting: does not modify kref | |
42e9a92f | 613 | */ |
9f9504a7 | 614 | static void fc_rport_error(struct fc_rport_priv *rdata, int err) |
42e9a92f | 615 | { |
d391966a HR |
616 | struct fc_lport *lport = rdata->local_port; |
617 | ||
9f9504a7 HR |
618 | FC_RPORT_DBG(rdata, "Error %d in state %s, retries %d\n", |
619 | -err, fc_rport_state(rdata), rdata->retries); | |
42e9a92f | 620 | |
6755db1c | 621 | switch (rdata->rp_state) { |
a7b12a27 | 622 | case RPORT_ST_FLOGI: |
4b2164d4 | 623 | rdata->flags &= ~FC_RP_STARTED; |
9fb9d328 | 624 | fc_rport_enter_delete(rdata, RPORT_EV_FAILED); |
6755db1c | 625 | break; |
d391966a HR |
626 | case RPORT_ST_PLOGI: |
627 | if (lport->point_to_multipoint) { | |
628 | rdata->flags &= ~FC_RP_STARTED; | |
629 | fc_rport_enter_delete(rdata, RPORT_EV_FAILED); | |
630 | } else | |
631 | fc_rport_enter_logo(rdata); | |
632 | break; | |
6755db1c | 633 | case RPORT_ST_RTV: |
9fb9d328 | 634 | fc_rport_enter_ready(rdata); |
6755db1c | 635 | break; |
370c3bd0 JE |
636 | case RPORT_ST_PRLI: |
637 | case RPORT_ST_ADISC: | |
638 | fc_rport_enter_logo(rdata); | |
639 | break; | |
a7b12a27 | 640 | case RPORT_ST_PLOGI_WAIT: |
14194054 | 641 | case RPORT_ST_DELETE: |
6755db1c CL |
642 | case RPORT_ST_READY: |
643 | case RPORT_ST_INIT: | |
644 | break; | |
42e9a92f RL |
645 | } |
646 | } | |
647 | ||
6755db1c | 648 | /** |
3a3b42bf RL |
649 | * fc_rport_error_retry() - Handler for remote port state retries |
650 | * @rdata: The remote port whose state is to be retried | |
9f9504a7 | 651 | * @err: The error code |
6755db1c CL |
652 | * |
653 | * If the error was an exchange timeout retry immediately, | |
654 | * otherwise wait for E_D_TOV. | |
655 | * | |
656 | * Locking Note: The rport lock is expected to be held before | |
657 | * calling this routine | |
4d2095cc HR |
658 | * |
659 | * Reference counting: increments kref when scheduling retry_work | |
6755db1c | 660 | */ |
9f9504a7 | 661 | static void fc_rport_error_retry(struct fc_rport_priv *rdata, int err) |
6755db1c | 662 | { |
a50cc9ec | 663 | unsigned long delay = msecs_to_jiffies(rdata->e_d_tov); |
4d2095cc | 664 | struct fc_lport *lport = rdata->local_port; |
6755db1c CL |
665 | |
666 | /* make sure this isn't an FC_EX_CLOSED error, never retry those */ | |
9f9504a7 | 667 | if (err == -FC_EX_CLOSED) |
28a4af1e | 668 | goto out; |
6755db1c | 669 | |
a3666955 | 670 | if (rdata->retries < rdata->local_port->max_rport_retry_count) { |
9f9504a7 HR |
671 | FC_RPORT_DBG(rdata, "Error %d in state %s, retrying\n", |
672 | err, fc_rport_state(rdata)); | |
6755db1c CL |
673 | rdata->retries++; |
674 | /* no additional delay on exchange timeouts */ | |
9f9504a7 | 675 | if (err == -FC_EX_TIMEOUT) |
6755db1c | 676 | delay = 0; |
4d2095cc HR |
677 | kref_get(&rdata->kref); |
678 | if (!schedule_delayed_work(&rdata->retry_work, delay)) | |
679 | kref_put(&rdata->kref, lport->tt.rport_destroy); | |
6755db1c CL |
680 | return; |
681 | } | |
682 | ||
28a4af1e | 683 | out: |
9f9504a7 | 684 | fc_rport_error(rdata, err); |
6755db1c CL |
685 | } |
686 | ||
42e9a92f | 687 | /** |
a7b12a27 JE |
688 | * fc_rport_login_complete() - Handle parameters and completion of p-mp login. |
689 | * @rdata: The remote port which we logged into or which logged into us. | |
690 | * @fp: The FLOGI or PLOGI request or response frame | |
691 | * | |
692 | * Returns non-zero error if a problem is detected with the frame. | |
693 | * Does not free the frame. | |
694 | * | |
695 | * This is only used in point-to-multipoint mode for FIP currently. | |
696 | */ | |
697 | static int fc_rport_login_complete(struct fc_rport_priv *rdata, | |
698 | struct fc_frame *fp) | |
699 | { | |
700 | struct fc_lport *lport = rdata->local_port; | |
701 | struct fc_els_flogi *flogi; | |
702 | unsigned int e_d_tov; | |
703 | u16 csp_flags; | |
704 | ||
705 | flogi = fc_frame_payload_get(fp, sizeof(*flogi)); | |
706 | if (!flogi) | |
707 | return -EINVAL; | |
708 | ||
709 | csp_flags = ntohs(flogi->fl_csp.sp_features); | |
710 | ||
711 | if (fc_frame_payload_op(fp) == ELS_FLOGI) { | |
712 | if (csp_flags & FC_SP_FT_FPORT) { | |
713 | FC_RPORT_DBG(rdata, "Fabric bit set in FLOGI\n"); | |
714 | return -EINVAL; | |
715 | } | |
716 | } else { | |
717 | ||
718 | /* | |
719 | * E_D_TOV is not valid on an incoming FLOGI request. | |
720 | */ | |
721 | e_d_tov = ntohl(flogi->fl_csp.sp_e_d_tov); | |
722 | if (csp_flags & FC_SP_FT_EDTR) | |
723 | e_d_tov /= 1000000; | |
724 | if (e_d_tov > rdata->e_d_tov) | |
725 | rdata->e_d_tov = e_d_tov; | |
726 | } | |
727 | rdata->maxframe_size = fc_plogi_get_maxframe(flogi, lport->mfs); | |
728 | return 0; | |
729 | } | |
730 | ||
731 | /** | |
732 | * fc_rport_flogi_resp() - Handle response to FLOGI request for p-mp mode | |
733 | * @sp: The sequence that the FLOGI was on | |
734 | * @fp: The FLOGI response frame | |
735 | * @rp_arg: The remote port that received the FLOGI response | |
736 | */ | |
c6b21c93 BVA |
737 | static void fc_rport_flogi_resp(struct fc_seq *sp, struct fc_frame *fp, |
738 | void *rp_arg) | |
a7b12a27 JE |
739 | { |
740 | struct fc_rport_priv *rdata = rp_arg; | |
741 | struct fc_lport *lport = rdata->local_port; | |
742 | struct fc_els_flogi *flogi; | |
743 | unsigned int r_a_tov; | |
9f9504a7 HR |
744 | u8 opcode; |
745 | int err = 0; | |
a7b12a27 | 746 | |
9f9504a7 HR |
747 | FC_RPORT_DBG(rdata, "Received a FLOGI %s\n", |
748 | IS_ERR(fp) ? "error" : fc_els_resp_type(fp)); | |
a7b12a27 JE |
749 | |
750 | if (fp == ERR_PTR(-FC_EX_CLOSED)) | |
0e9e3d3b | 751 | goto put; |
a7b12a27 JE |
752 | |
753 | mutex_lock(&rdata->rp_mutex); | |
754 | ||
755 | if (rdata->rp_state != RPORT_ST_FLOGI) { | |
756 | FC_RPORT_DBG(rdata, "Received a FLOGI response, but in state " | |
757 | "%s\n", fc_rport_state(rdata)); | |
758 | if (IS_ERR(fp)) | |
759 | goto err; | |
760 | goto out; | |
761 | } | |
762 | ||
763 | if (IS_ERR(fp)) { | |
9f9504a7 | 764 | fc_rport_error(rdata, PTR_ERR(fp)); |
a7b12a27 JE |
765 | goto err; |
766 | } | |
9f9504a7 HR |
767 | opcode = fc_frame_payload_op(fp); |
768 | if (opcode == ELS_LS_RJT) { | |
769 | struct fc_els_ls_rjt *rjt; | |
a7b12a27 | 770 | |
9f9504a7 HR |
771 | rjt = fc_frame_payload_get(fp, sizeof(*rjt)); |
772 | FC_RPORT_DBG(rdata, "FLOGI ELS rejected, reason %x expl %x\n", | |
773 | rjt->er_reason, rjt->er_explan); | |
774 | err = -FC_EX_ELS_RJT; | |
775 | goto bad; | |
776 | } else if (opcode != ELS_LS_ACC) { | |
777 | FC_RPORT_DBG(rdata, "FLOGI ELS invalid opcode %x\n", opcode); | |
778 | err = -FC_EX_ELS_RJT; | |
a7b12a27 | 779 | goto bad; |
9f9504a7 HR |
780 | } |
781 | if (fc_rport_login_complete(rdata, fp)) { | |
782 | FC_RPORT_DBG(rdata, "FLOGI failed, no login\n"); | |
783 | err = -FC_EX_INV_LOGIN; | |
a7b12a27 | 784 | goto bad; |
9f9504a7 | 785 | } |
a7b12a27 JE |
786 | |
787 | flogi = fc_frame_payload_get(fp, sizeof(*flogi)); | |
f89b8d67 | 788 | if (!flogi) { |
9f9504a7 | 789 | err = -FC_EX_ALLOC_ERR; |
a7b12a27 | 790 | goto bad; |
f89b8d67 | 791 | } |
a7b12a27 JE |
792 | r_a_tov = ntohl(flogi->fl_csp.sp_r_a_tov); |
793 | if (r_a_tov > rdata->r_a_tov) | |
794 | rdata->r_a_tov = r_a_tov; | |
795 | ||
796 | if (rdata->ids.port_name < lport->wwpn) | |
797 | fc_rport_enter_plogi(rdata); | |
798 | else | |
799 | fc_rport_state_enter(rdata, RPORT_ST_PLOGI_WAIT); | |
800 | out: | |
801 | fc_frame_free(fp); | |
802 | err: | |
803 | mutex_unlock(&rdata->rp_mutex); | |
0e9e3d3b | 804 | put: |
baa6719f | 805 | kref_put(&rdata->kref, lport->tt.rport_destroy); |
a7b12a27 JE |
806 | return; |
807 | bad: | |
9f9504a7 HR |
808 | FC_RPORT_DBG(rdata, "Bad FLOGI response\n"); |
809 | fc_rport_error_retry(rdata, err); | |
a7b12a27 JE |
810 | goto out; |
811 | } | |
812 | ||
813 | /** | |
814 | * fc_rport_enter_flogi() - Send a FLOGI request to the remote port for p-mp | |
815 | * @rdata: The remote port to send a FLOGI to | |
816 | * | |
817 | * Locking Note: The rport lock is expected to be held before calling | |
818 | * this routine. | |
4d2095cc HR |
819 | * |
820 | * Reference counting: increments kref when sending ELS | |
a7b12a27 JE |
821 | */ |
822 | static void fc_rport_enter_flogi(struct fc_rport_priv *rdata) | |
823 | { | |
824 | struct fc_lport *lport = rdata->local_port; | |
825 | struct fc_frame *fp; | |
826 | ||
827 | if (!lport->point_to_multipoint) | |
828 | return fc_rport_enter_plogi(rdata); | |
829 | ||
830 | FC_RPORT_DBG(rdata, "Entered FLOGI state from %s state\n", | |
831 | fc_rport_state(rdata)); | |
832 | ||
833 | fc_rport_state_enter(rdata, RPORT_ST_FLOGI); | |
834 | ||
835 | fp = fc_frame_alloc(lport, sizeof(struct fc_els_flogi)); | |
836 | if (!fp) | |
9f9504a7 | 837 | return fc_rport_error_retry(rdata, -FC_EX_ALLOC_ERR); |
a7b12a27 | 838 | |
4d2095cc | 839 | kref_get(&rdata->kref); |
a7b12a27 JE |
840 | if (!lport->tt.elsct_send(lport, rdata->ids.port_id, fp, ELS_FLOGI, |
841 | fc_rport_flogi_resp, rdata, | |
4d2095cc | 842 | 2 * lport->r_a_tov)) { |
9f9504a7 | 843 | fc_rport_error_retry(rdata, -FC_EX_XMIT_ERR); |
4d2095cc HR |
844 | kref_put(&rdata->kref, lport->tt.rport_destroy); |
845 | } | |
a7b12a27 JE |
846 | } |
847 | ||
848 | /** | |
849 | * fc_rport_recv_flogi_req() - Handle Fabric Login (FLOGI) request in p-mp mode | |
850 | * @lport: The local port that received the PLOGI request | |
a7b12a27 | 851 | * @rx_fp: The PLOGI request frame |
4d2095cc HR |
852 | * |
853 | * Reference counting: drops kref on return | |
a7b12a27 JE |
854 | */ |
855 | static void fc_rport_recv_flogi_req(struct fc_lport *lport, | |
92261156 | 856 | struct fc_frame *rx_fp) |
a7b12a27 JE |
857 | { |
858 | struct fc_disc *disc; | |
859 | struct fc_els_flogi *flp; | |
860 | struct fc_rport_priv *rdata; | |
861 | struct fc_frame *fp = rx_fp; | |
a7b12a27 | 862 | struct fc_seq_els_data rjt_data; |
24f089e2 | 863 | u32 sid; |
a7b12a27 | 864 | |
251748a9 | 865 | sid = fc_frame_sid(fp); |
a7b12a27 JE |
866 | |
867 | FC_RPORT_ID_DBG(lport, sid, "Received FLOGI request\n"); | |
868 | ||
869 | disc = &lport->disc; | |
a7b12a27 JE |
870 | if (!lport->point_to_multipoint) { |
871 | rjt_data.reason = ELS_RJT_UNSUP; | |
872 | rjt_data.explan = ELS_EXPL_NONE; | |
873 | goto reject; | |
874 | } | |
875 | ||
876 | flp = fc_frame_payload_get(fp, sizeof(*flp)); | |
877 | if (!flp) { | |
878 | rjt_data.reason = ELS_RJT_LOGIC; | |
879 | rjt_data.explan = ELS_EXPL_INV_LEN; | |
880 | goto reject; | |
881 | } | |
882 | ||
883 | rdata = lport->tt.rport_lookup(lport, sid); | |
884 | if (!rdata) { | |
885 | rjt_data.reason = ELS_RJT_FIP; | |
886 | rjt_data.explan = ELS_EXPL_NOT_NEIGHBOR; | |
887 | goto reject; | |
888 | } | |
889 | mutex_lock(&rdata->rp_mutex); | |
890 | ||
891 | FC_RPORT_DBG(rdata, "Received FLOGI in %s state\n", | |
892 | fc_rport_state(rdata)); | |
893 | ||
894 | switch (rdata->rp_state) { | |
895 | case RPORT_ST_INIT: | |
48058481 KP |
896 | /* |
897 | * If received the FLOGI request on RPORT which is INIT state | |
898 | * (means not transition to FLOGI either fc_rport timeout | |
899 | * function didn;t trigger or this end hasn;t received | |
900 | * beacon yet from other end. In that case only, allow RPORT | |
901 | * state machine to continue, otherwise fall through which | |
902 | * causes the code to send reject response. | |
903 | * NOTE; Not checking for FIP->state such as VNMP_UP or | |
904 | * VNMP_CLAIM because if FIP state is not one of those, | |
905 | * RPORT wouldn;t have created and 'rport_lookup' would have | |
906 | * failed anyway in that case. | |
907 | */ | |
4d2095cc | 908 | break; |
a7b12a27 JE |
909 | case RPORT_ST_DELETE: |
910 | mutex_unlock(&rdata->rp_mutex); | |
911 | rjt_data.reason = ELS_RJT_FIP; | |
912 | rjt_data.explan = ELS_EXPL_NOT_NEIGHBOR; | |
baa6719f | 913 | goto reject_put; |
a7b12a27 JE |
914 | case RPORT_ST_FLOGI: |
915 | case RPORT_ST_PLOGI_WAIT: | |
916 | case RPORT_ST_PLOGI: | |
917 | break; | |
918 | case RPORT_ST_PRLI: | |
919 | case RPORT_ST_RTV: | |
920 | case RPORT_ST_READY: | |
921 | case RPORT_ST_ADISC: | |
922 | /* | |
923 | * Set the remote port to be deleted and to then restart. | |
924 | * This queues work to be sure exchanges are reset. | |
925 | */ | |
926 | fc_rport_enter_delete(rdata, RPORT_EV_LOGO); | |
927 | mutex_unlock(&rdata->rp_mutex); | |
928 | rjt_data.reason = ELS_RJT_BUSY; | |
929 | rjt_data.explan = ELS_EXPL_NONE; | |
baa6719f | 930 | goto reject_put; |
a7b12a27 JE |
931 | } |
932 | if (fc_rport_login_complete(rdata, fp)) { | |
933 | mutex_unlock(&rdata->rp_mutex); | |
934 | rjt_data.reason = ELS_RJT_LOGIC; | |
935 | rjt_data.explan = ELS_EXPL_NONE; | |
baa6719f | 936 | goto reject_put; |
a7b12a27 | 937 | } |
a7b12a27 JE |
938 | |
939 | fp = fc_frame_alloc(lport, sizeof(*flp)); | |
940 | if (!fp) | |
941 | goto out; | |
942 | ||
a7b12a27 JE |
943 | fc_flogi_fill(lport, fp); |
944 | flp = fc_frame_payload_get(fp, sizeof(*flp)); | |
945 | flp->fl_cmd = ELS_LS_ACC; | |
946 | ||
24f089e2 JE |
947 | fc_fill_reply_hdr(fp, rx_fp, FC_RCTL_ELS_REP, 0); |
948 | lport->tt.frame_send(lport, fp); | |
a7b12a27 | 949 | |
f89b8d67 HR |
950 | /* |
951 | * Do not proceed with the state machine if our | |
952 | * FLOGI has crossed with an FLOGI from the | |
953 | * remote port; wait for the FLOGI response instead. | |
954 | */ | |
955 | if (rdata->rp_state != RPORT_ST_FLOGI) { | |
956 | if (rdata->ids.port_name < lport->wwpn) | |
957 | fc_rport_enter_plogi(rdata); | |
958 | else | |
959 | fc_rport_state_enter(rdata, RPORT_ST_PLOGI_WAIT); | |
960 | } | |
a7b12a27 JE |
961 | out: |
962 | mutex_unlock(&rdata->rp_mutex); | |
baa6719f | 963 | kref_put(&rdata->kref, lport->tt.rport_destroy); |
24f089e2 | 964 | fc_frame_free(rx_fp); |
a7b12a27 JE |
965 | return; |
966 | ||
baa6719f HR |
967 | reject_put: |
968 | kref_put(&rdata->kref, lport->tt.rport_destroy); | |
a7b12a27 | 969 | reject: |
92261156 | 970 | lport->tt.seq_els_rsp_send(rx_fp, ELS_LS_RJT, &rjt_data); |
24f089e2 | 971 | fc_frame_free(rx_fp); |
a7b12a27 JE |
972 | } |
973 | ||
974 | /** | |
975 | * fc_rport_plogi_resp() - Handler for ELS PLOGI responses | |
3a3b42bf RL |
976 | * @sp: The sequence the PLOGI is on |
977 | * @fp: The PLOGI response frame | |
978 | * @rdata_arg: The remote port that sent the PLOGI response | |
42e9a92f RL |
979 | * |
980 | * Locking Note: This function will be called without the rport lock | |
981 | * held, but it will lock, call an _enter_* function or fc_rport_error | |
982 | * and then unlock the rport. | |
983 | */ | |
984 | static void fc_rport_plogi_resp(struct fc_seq *sp, struct fc_frame *fp, | |
9fb9d328 | 985 | void *rdata_arg) |
42e9a92f | 986 | { |
9fb9d328 | 987 | struct fc_rport_priv *rdata = rdata_arg; |
42e9a92f | 988 | struct fc_lport *lport = rdata->local_port; |
a29e7646 | 989 | struct fc_els_flogi *plp = NULL; |
42e9a92f RL |
990 | u16 csp_seq; |
991 | u16 cssp_seq; | |
992 | u8 op; | |
993 | ||
f657d299 | 994 | FC_RPORT_DBG(rdata, "Received a PLOGI %s\n", fc_els_resp_type(fp)); |
42e9a92f | 995 | |
785141c6 CD |
996 | if (fp == ERR_PTR(-FC_EX_CLOSED)) |
997 | goto put; | |
998 | ||
999 | mutex_lock(&rdata->rp_mutex); | |
1000 | ||
42e9a92f | 1001 | if (rdata->rp_state != RPORT_ST_PLOGI) { |
9fb9d328 JE |
1002 | FC_RPORT_DBG(rdata, "Received a PLOGI response, but in state " |
1003 | "%s\n", fc_rport_state(rdata)); | |
76f6804e AJ |
1004 | if (IS_ERR(fp)) |
1005 | goto err; | |
42e9a92f RL |
1006 | goto out; |
1007 | } | |
1008 | ||
76f6804e | 1009 | if (IS_ERR(fp)) { |
9f9504a7 | 1010 | fc_rport_error_retry(rdata, PTR_ERR(fp)); |
76f6804e AJ |
1011 | goto err; |
1012 | } | |
1013 | ||
42e9a92f RL |
1014 | op = fc_frame_payload_op(fp); |
1015 | if (op == ELS_LS_ACC && | |
1016 | (plp = fc_frame_payload_get(fp, sizeof(*plp))) != NULL) { | |
f211fa51 JE |
1017 | rdata->ids.port_name = get_unaligned_be64(&plp->fl_wwpn); |
1018 | rdata->ids.node_name = get_unaligned_be64(&plp->fl_wwnn); | |
42e9a92f | 1019 | |
75a2792d BPG |
1020 | /* save plogi response sp_features for further reference */ |
1021 | rdata->sp_features = ntohs(plp->fl_csp.sp_features); | |
1022 | ||
a7b12a27 JE |
1023 | if (lport->point_to_multipoint) |
1024 | fc_rport_login_complete(rdata, fp); | |
42e9a92f RL |
1025 | csp_seq = ntohs(plp->fl_csp.sp_tot_seq); |
1026 | cssp_seq = ntohs(plp->fl_cssp[3 - 1].cp_con_seq); | |
1027 | if (cssp_seq < csp_seq) | |
1028 | csp_seq = cssp_seq; | |
1029 | rdata->max_seq = csp_seq; | |
f211fa51 | 1030 | rdata->maxframe_size = fc_plogi_get_maxframe(plp, lport->mfs); |
3ac6f98f | 1031 | fc_rport_enter_prli(rdata); |
9f9504a7 HR |
1032 | } else { |
1033 | struct fc_els_ls_rjt *rjt; | |
42e9a92f | 1034 | |
9f9504a7 HR |
1035 | rjt = fc_frame_payload_get(fp, sizeof(*rjt)); |
1036 | FC_RPORT_DBG(rdata, "PLOGI ELS rejected, reason %x expl %x\n", | |
1037 | rjt->er_reason, rjt->er_explan); | |
1038 | fc_rport_error_retry(rdata, -FC_EX_ELS_RJT); | |
1039 | } | |
42e9a92f RL |
1040 | out: |
1041 | fc_frame_free(fp); | |
1042 | err: | |
1043 | mutex_unlock(&rdata->rp_mutex); | |
785141c6 | 1044 | put: |
baa6719f | 1045 | kref_put(&rdata->kref, lport->tt.rport_destroy); |
42e9a92f RL |
1046 | } |
1047 | ||
e0335f67 MR |
1048 | static bool |
1049 | fc_rport_compatible_roles(struct fc_lport *lport, struct fc_rport_priv *rdata) | |
1050 | { | |
1051 | if (rdata->ids.roles == FC_PORT_ROLE_UNKNOWN) | |
1052 | return true; | |
1053 | if ((rdata->ids.roles & FC_PORT_ROLE_FCP_TARGET) && | |
1054 | (lport->service_params & FCP_SPPF_INIT_FCN)) | |
1055 | return true; | |
1056 | if ((rdata->ids.roles & FC_PORT_ROLE_FCP_INITIATOR) && | |
1057 | (lport->service_params & FCP_SPPF_TARG_FCN)) | |
1058 | return true; | |
1059 | return false; | |
1060 | } | |
1061 | ||
42e9a92f | 1062 | /** |
3a3b42bf RL |
1063 | * fc_rport_enter_plogi() - Send Port Login (PLOGI) request |
1064 | * @rdata: The remote port to send a PLOGI to | |
42e9a92f RL |
1065 | * |
1066 | * Locking Note: The rport lock is expected to be held before calling | |
1067 | * this routine. | |
4d2095cc HR |
1068 | * |
1069 | * Reference counting: increments kref when sending ELS | |
42e9a92f | 1070 | */ |
9fb9d328 | 1071 | static void fc_rport_enter_plogi(struct fc_rport_priv *rdata) |
42e9a92f | 1072 | { |
42e9a92f RL |
1073 | struct fc_lport *lport = rdata->local_port; |
1074 | struct fc_frame *fp; | |
1075 | ||
e0335f67 MR |
1076 | if (!fc_rport_compatible_roles(lport, rdata)) { |
1077 | FC_RPORT_DBG(rdata, "PLOGI suppressed for incompatible role\n"); | |
1078 | fc_rport_state_enter(rdata, RPORT_ST_PLOGI_WAIT); | |
1079 | return; | |
1080 | } | |
1081 | ||
9fb9d328 JE |
1082 | FC_RPORT_DBG(rdata, "Port entered PLOGI state from %s state\n", |
1083 | fc_rport_state(rdata)); | |
42e9a92f | 1084 | |
9fb9d328 | 1085 | fc_rport_state_enter(rdata, RPORT_ST_PLOGI); |
42e9a92f | 1086 | |
f211fa51 | 1087 | rdata->maxframe_size = FC_MIN_MAX_PAYLOAD; |
42e9a92f RL |
1088 | fp = fc_frame_alloc(lport, sizeof(struct fc_els_flogi)); |
1089 | if (!fp) { | |
a7b12a27 | 1090 | FC_RPORT_DBG(rdata, "%s frame alloc failed\n", __func__); |
9f9504a7 | 1091 | fc_rport_error_retry(rdata, -FC_EX_ALLOC_ERR); |
42e9a92f RL |
1092 | return; |
1093 | } | |
1094 | rdata->e_d_tov = lport->e_d_tov; | |
1095 | ||
4d2095cc | 1096 | kref_get(&rdata->kref); |
f211fa51 | 1097 | if (!lport->tt.elsct_send(lport, rdata->ids.port_id, fp, ELS_PLOGI, |
b94f8951 | 1098 | fc_rport_plogi_resp, rdata, |
4d2095cc | 1099 | 2 * lport->r_a_tov)) { |
9f9504a7 | 1100 | fc_rport_error_retry(rdata, -FC_EX_XMIT_ERR); |
4d2095cc HR |
1101 | kref_put(&rdata->kref, lport->tt.rport_destroy); |
1102 | } | |
42e9a92f RL |
1103 | } |
1104 | ||
1105 | /** | |
34f42a07 | 1106 | * fc_rport_prli_resp() - Process Login (PRLI) response handler |
3a3b42bf RL |
1107 | * @sp: The sequence the PRLI response was on |
1108 | * @fp: The PRLI response frame | |
1109 | * @rdata_arg: The remote port that sent the PRLI response | |
42e9a92f RL |
1110 | * |
1111 | * Locking Note: This function will be called without the rport lock | |
1112 | * held, but it will lock, call an _enter_* function or fc_rport_error | |
1113 | * and then unlock the rport. | |
1114 | */ | |
1115 | static void fc_rport_prli_resp(struct fc_seq *sp, struct fc_frame *fp, | |
9fb9d328 | 1116 | void *rdata_arg) |
42e9a92f | 1117 | { |
9fb9d328 | 1118 | struct fc_rport_priv *rdata = rdata_arg; |
42e9a92f RL |
1119 | struct { |
1120 | struct fc_els_prli prli; | |
1121 | struct fc_els_spp spp; | |
1122 | } *pp; | |
925cedae | 1123 | struct fc_els_spp temp_spp; |
57d3ec7e | 1124 | struct fc_els_ls_rjt *rjt; |
925cedae | 1125 | struct fc4_prov *prov; |
42e9a92f RL |
1126 | u32 roles = FC_RPORT_ROLE_UNKNOWN; |
1127 | u32 fcp_parm = 0; | |
1128 | u8 op; | |
618461c0 | 1129 | u8 resp_code = 0; |
42e9a92f | 1130 | |
f657d299 | 1131 | FC_RPORT_DBG(rdata, "Received a PRLI %s\n", fc_els_resp_type(fp)); |
42e9a92f | 1132 | |
785141c6 CD |
1133 | if (fp == ERR_PTR(-FC_EX_CLOSED)) |
1134 | goto put; | |
1135 | ||
1136 | mutex_lock(&rdata->rp_mutex); | |
1137 | ||
42e9a92f | 1138 | if (rdata->rp_state != RPORT_ST_PRLI) { |
9fb9d328 JE |
1139 | FC_RPORT_DBG(rdata, "Received a PRLI response, but in state " |
1140 | "%s\n", fc_rport_state(rdata)); | |
76f6804e AJ |
1141 | if (IS_ERR(fp)) |
1142 | goto err; | |
42e9a92f RL |
1143 | goto out; |
1144 | } | |
1145 | ||
76f6804e | 1146 | if (IS_ERR(fp)) { |
9f9504a7 | 1147 | fc_rport_error_retry(rdata, PTR_ERR(fp)); |
76f6804e AJ |
1148 | goto err; |
1149 | } | |
1150 | ||
6bd054cb RL |
1151 | /* reinitialize remote port roles */ |
1152 | rdata->ids.roles = FC_RPORT_ROLE_UNKNOWN; | |
1153 | ||
42e9a92f RL |
1154 | op = fc_frame_payload_op(fp); |
1155 | if (op == ELS_LS_ACC) { | |
1156 | pp = fc_frame_payload_get(fp, sizeof(*pp)); | |
618461c0 BPG |
1157 | if (!pp) |
1158 | goto out; | |
1159 | ||
1160 | resp_code = (pp->spp.spp_flags & FC_SPP_RESP_MASK); | |
1161 | FC_RPORT_DBG(rdata, "PRLI spp_flags = 0x%x\n", | |
1162 | pp->spp.spp_flags); | |
75a2792d | 1163 | rdata->spp_type = pp->spp.spp_type; |
618461c0 BPG |
1164 | if (resp_code != FC_SPP_RESP_ACK) { |
1165 | if (resp_code == FC_SPP_RESP_CONF) | |
9f9504a7 | 1166 | fc_rport_error(rdata, -FC_EX_SEQ_ERR); |
618461c0 | 1167 | else |
9f9504a7 | 1168 | fc_rport_error_retry(rdata, -FC_EX_SEQ_ERR); |
618461c0 | 1169 | goto out; |
42e9a92f | 1170 | } |
618461c0 BPG |
1171 | if (pp->prli.prli_spp_len < sizeof(pp->spp)) |
1172 | goto out; | |
1173 | ||
1174 | fcp_parm = ntohl(pp->spp.spp_params); | |
1175 | if (fcp_parm & FCP_SPPF_RETRY) | |
1176 | rdata->flags |= FC_RP_FLAGS_RETRY; | |
75a2792d BPG |
1177 | if (fcp_parm & FCP_SPPF_CONF_COMPL) |
1178 | rdata->flags |= FC_RP_FLAGS_CONF_REQ; | |
42e9a92f | 1179 | |
925cedae JE |
1180 | prov = fc_passive_prov[FC_TYPE_FCP]; |
1181 | if (prov) { | |
1182 | memset(&temp_spp, 0, sizeof(temp_spp)); | |
1183 | prov->prli(rdata, pp->prli.prli_spp_len, | |
1184 | &pp->spp, &temp_spp); | |
1185 | } | |
1186 | ||
f211fa51 | 1187 | rdata->supported_classes = FC_COS_CLASS3; |
42e9a92f RL |
1188 | if (fcp_parm & FCP_SPPF_INIT_FCN) |
1189 | roles |= FC_RPORT_ROLE_FCP_INITIATOR; | |
1190 | if (fcp_parm & FCP_SPPF_TARG_FCN) | |
1191 | roles |= FC_RPORT_ROLE_FCP_TARGET; | |
1192 | ||
f211fa51 | 1193 | rdata->ids.roles = roles; |
9fb9d328 | 1194 | fc_rport_enter_rtv(rdata); |
42e9a92f RL |
1195 | |
1196 | } else { | |
57d3ec7e HR |
1197 | rjt = fc_frame_payload_get(fp, sizeof(*rjt)); |
1198 | FC_RPORT_DBG(rdata, "PRLI ELS rejected, reason %x expl %x\n", | |
1199 | rjt->er_reason, rjt->er_explan); | |
9f9504a7 | 1200 | fc_rport_error_retry(rdata, FC_EX_ELS_RJT); |
42e9a92f RL |
1201 | } |
1202 | ||
1203 | out: | |
1204 | fc_frame_free(fp); | |
1205 | err: | |
1206 | mutex_unlock(&rdata->rp_mutex); | |
785141c6 | 1207 | put: |
f211fa51 | 1208 | kref_put(&rdata->kref, rdata->local_port->tt.rport_destroy); |
42e9a92f RL |
1209 | } |
1210 | ||
42e9a92f | 1211 | /** |
3a3b42bf RL |
1212 | * fc_rport_enter_prli() - Send Process Login (PRLI) request |
1213 | * @rdata: The remote port to send the PRLI request to | |
42e9a92f RL |
1214 | * |
1215 | * Locking Note: The rport lock is expected to be held before calling | |
1216 | * this routine. | |
4d2095cc HR |
1217 | * |
1218 | * Reference counting: increments kref when sending ELS | |
42e9a92f | 1219 | */ |
9fb9d328 | 1220 | static void fc_rport_enter_prli(struct fc_rport_priv *rdata) |
42e9a92f | 1221 | { |
42e9a92f RL |
1222 | struct fc_lport *lport = rdata->local_port; |
1223 | struct { | |
1224 | struct fc_els_prli prli; | |
1225 | struct fc_els_spp spp; | |
1226 | } *pp; | |
1227 | struct fc_frame *fp; | |
925cedae | 1228 | struct fc4_prov *prov; |
42e9a92f | 1229 | |
3ac6f98f JE |
1230 | /* |
1231 | * If the rport is one of the well known addresses | |
1232 | * we skip PRLI and RTV and go straight to READY. | |
1233 | */ | |
1234 | if (rdata->ids.port_id >= FC_FID_DOM_MGR) { | |
1235 | fc_rport_enter_ready(rdata); | |
1236 | return; | |
1237 | } | |
1238 | ||
9fb9d328 JE |
1239 | FC_RPORT_DBG(rdata, "Port entered PRLI state from %s state\n", |
1240 | fc_rport_state(rdata)); | |
42e9a92f | 1241 | |
9fb9d328 | 1242 | fc_rport_state_enter(rdata, RPORT_ST_PRLI); |
42e9a92f RL |
1243 | |
1244 | fp = fc_frame_alloc(lport, sizeof(*pp)); | |
1245 | if (!fp) { | |
9f9504a7 | 1246 | fc_rport_error_retry(rdata, -FC_EX_ALLOC_ERR); |
42e9a92f RL |
1247 | return; |
1248 | } | |
1249 | ||
925cedae JE |
1250 | fc_prli_fill(lport, fp); |
1251 | ||
1252 | prov = fc_passive_prov[FC_TYPE_FCP]; | |
1253 | if (prov) { | |
1254 | pp = fc_frame_payload_get(fp, sizeof(*pp)); | |
1255 | prov->prli(rdata, sizeof(pp->spp), NULL, &pp->spp); | |
1256 | } | |
1257 | ||
1258 | fc_fill_fc_hdr(fp, FC_RCTL_ELS_REQ, rdata->ids.port_id, | |
1259 | fc_host_port_id(lport->host), FC_TYPE_ELS, | |
1260 | FC_FC_FIRST_SEQ | FC_FC_END_SEQ | FC_FC_SEQ_INIT, 0); | |
1261 | ||
4d2095cc | 1262 | kref_get(&rdata->kref); |
925cedae | 1263 | if (!lport->tt.exch_seq_send(lport, fp, fc_rport_prli_resp, |
4d2095cc | 1264 | NULL, rdata, 2 * lport->r_a_tov)) { |
9f9504a7 | 1265 | fc_rport_error_retry(rdata, -FC_EX_XMIT_ERR); |
4d2095cc HR |
1266 | kref_put(&rdata->kref, lport->tt.rport_destroy); |
1267 | } | |
42e9a92f RL |
1268 | } |
1269 | ||
1270 | /** | |
7c5a51b8 | 1271 | * fc_rport_rtv_resp() - Handler for Request Timeout Value (RTV) responses |
3a3b42bf RL |
1272 | * @sp: The sequence the RTV was on |
1273 | * @fp: The RTV response frame | |
1274 | * @rdata_arg: The remote port that sent the RTV response | |
42e9a92f RL |
1275 | * |
1276 | * Many targets don't seem to support this. | |
1277 | * | |
1278 | * Locking Note: This function will be called without the rport lock | |
1279 | * held, but it will lock, call an _enter_* function or fc_rport_error | |
1280 | * and then unlock the rport. | |
1281 | */ | |
1282 | static void fc_rport_rtv_resp(struct fc_seq *sp, struct fc_frame *fp, | |
9fb9d328 | 1283 | void *rdata_arg) |
42e9a92f | 1284 | { |
9fb9d328 | 1285 | struct fc_rport_priv *rdata = rdata_arg; |
42e9a92f RL |
1286 | u8 op; |
1287 | ||
f657d299 | 1288 | FC_RPORT_DBG(rdata, "Received a RTV %s\n", fc_els_resp_type(fp)); |
42e9a92f | 1289 | |
785141c6 CD |
1290 | if (fp == ERR_PTR(-FC_EX_CLOSED)) |
1291 | goto put; | |
1292 | ||
1293 | mutex_lock(&rdata->rp_mutex); | |
1294 | ||
42e9a92f | 1295 | if (rdata->rp_state != RPORT_ST_RTV) { |
9fb9d328 JE |
1296 | FC_RPORT_DBG(rdata, "Received a RTV response, but in state " |
1297 | "%s\n", fc_rport_state(rdata)); | |
76f6804e AJ |
1298 | if (IS_ERR(fp)) |
1299 | goto err; | |
42e9a92f RL |
1300 | goto out; |
1301 | } | |
1302 | ||
76f6804e | 1303 | if (IS_ERR(fp)) { |
9f9504a7 | 1304 | fc_rport_error(rdata, PTR_ERR(fp)); |
76f6804e AJ |
1305 | goto err; |
1306 | } | |
1307 | ||
42e9a92f RL |
1308 | op = fc_frame_payload_op(fp); |
1309 | if (op == ELS_LS_ACC) { | |
1310 | struct fc_els_rtv_acc *rtv; | |
1311 | u32 toq; | |
1312 | u32 tov; | |
1313 | ||
1314 | rtv = fc_frame_payload_get(fp, sizeof(*rtv)); | |
1315 | if (rtv) { | |
1316 | toq = ntohl(rtv->rtv_toq); | |
1317 | tov = ntohl(rtv->rtv_r_a_tov); | |
1318 | if (tov == 0) | |
1319 | tov = 1; | |
76e72ad1 HR |
1320 | if (tov > rdata->r_a_tov) |
1321 | rdata->r_a_tov = tov; | |
42e9a92f RL |
1322 | tov = ntohl(rtv->rtv_e_d_tov); |
1323 | if (toq & FC_ELS_RTV_EDRES) | |
1324 | tov /= 1000000; | |
1325 | if (tov == 0) | |
1326 | tov = 1; | |
76e72ad1 HR |
1327 | if (tov > rdata->e_d_tov) |
1328 | rdata->e_d_tov = tov; | |
42e9a92f RL |
1329 | } |
1330 | } | |
1331 | ||
9fb9d328 | 1332 | fc_rport_enter_ready(rdata); |
42e9a92f RL |
1333 | |
1334 | out: | |
1335 | fc_frame_free(fp); | |
1336 | err: | |
1337 | mutex_unlock(&rdata->rp_mutex); | |
785141c6 | 1338 | put: |
f211fa51 | 1339 | kref_put(&rdata->kref, rdata->local_port->tt.rport_destroy); |
42e9a92f RL |
1340 | } |
1341 | ||
1342 | /** | |
3a3b42bf RL |
1343 | * fc_rport_enter_rtv() - Send Request Timeout Value (RTV) request |
1344 | * @rdata: The remote port to send the RTV request to | |
42e9a92f RL |
1345 | * |
1346 | * Locking Note: The rport lock is expected to be held before calling | |
1347 | * this routine. | |
4d2095cc HR |
1348 | * |
1349 | * Reference counting: increments kref when sending ELS | |
42e9a92f | 1350 | */ |
9fb9d328 | 1351 | static void fc_rport_enter_rtv(struct fc_rport_priv *rdata) |
42e9a92f RL |
1352 | { |
1353 | struct fc_frame *fp; | |
42e9a92f RL |
1354 | struct fc_lport *lport = rdata->local_port; |
1355 | ||
9fb9d328 JE |
1356 | FC_RPORT_DBG(rdata, "Port entered RTV state from %s state\n", |
1357 | fc_rport_state(rdata)); | |
42e9a92f | 1358 | |
9fb9d328 | 1359 | fc_rport_state_enter(rdata, RPORT_ST_RTV); |
42e9a92f RL |
1360 | |
1361 | fp = fc_frame_alloc(lport, sizeof(struct fc_els_rtv)); | |
1362 | if (!fp) { | |
9f9504a7 | 1363 | fc_rport_error_retry(rdata, -FC_EX_ALLOC_ERR); |
42e9a92f RL |
1364 | return; |
1365 | } | |
1366 | ||
4d2095cc | 1367 | kref_get(&rdata->kref); |
f211fa51 | 1368 | if (!lport->tt.elsct_send(lport, rdata->ids.port_id, fp, ELS_RTV, |
b94f8951 | 1369 | fc_rport_rtv_resp, rdata, |
4d2095cc | 1370 | 2 * lport->r_a_tov)) { |
9f9504a7 | 1371 | fc_rport_error_retry(rdata, -FC_EX_XMIT_ERR); |
4d2095cc HR |
1372 | kref_put(&rdata->kref, lport->tt.rport_destroy); |
1373 | } | |
42e9a92f RL |
1374 | } |
1375 | ||
7c5a51b8 HR |
1376 | /** |
1377 | * fc_rport_recv_rtv_req() - Handler for Read Timeout Value (RTV) requests | |
1378 | * @rdata: The remote port that sent the RTV request | |
1379 | * @in_fp: The RTV request frame | |
1380 | * | |
1381 | * Locking Note: Called with the lport and rport locks held. | |
1382 | */ | |
1383 | static void fc_rport_recv_rtv_req(struct fc_rport_priv *rdata, | |
1384 | struct fc_frame *in_fp) | |
1385 | { | |
1386 | struct fc_lport *lport = rdata->local_port; | |
1387 | struct fc_frame *fp; | |
1388 | struct fc_els_rtv_acc *rtv; | |
1389 | struct fc_seq_els_data rjt_data; | |
1390 | ||
1391 | FC_RPORT_DBG(rdata, "Received RTV request\n"); | |
1392 | ||
1393 | fp = fc_frame_alloc(lport, sizeof(*rtv)); | |
1394 | if (!fp) { | |
1395 | rjt_data.reason = ELS_RJT_UNAB; | |
1396 | rjt_data.reason = ELS_EXPL_INSUF_RES; | |
1397 | lport->tt.seq_els_rsp_send(in_fp, ELS_LS_RJT, &rjt_data); | |
1398 | goto drop; | |
1399 | } | |
1400 | rtv = fc_frame_payload_get(fp, sizeof(*rtv)); | |
1401 | rtv->rtv_cmd = ELS_LS_ACC; | |
1402 | rtv->rtv_r_a_tov = htonl(lport->r_a_tov); | |
1403 | rtv->rtv_e_d_tov = htonl(lport->e_d_tov); | |
1404 | rtv->rtv_toq = 0; | |
1405 | fc_fill_reply_hdr(fp, in_fp, FC_RCTL_ELS_REP, 0); | |
1406 | lport->tt.frame_send(lport, fp); | |
1407 | drop: | |
1408 | fc_frame_free(in_fp); | |
1409 | } | |
1410 | ||
079ecd8c JE |
1411 | /** |
1412 | * fc_rport_logo_resp() - Handler for logout (LOGO) responses | |
1413 | * @sp: The sequence the LOGO was on | |
1414 | * @fp: The LOGO response frame | |
1415 | * @lport_arg: The local port | |
1416 | */ | |
1417 | static void fc_rport_logo_resp(struct fc_seq *sp, struct fc_frame *fp, | |
4d2095cc | 1418 | void *rdata_arg) |
079ecd8c | 1419 | { |
4d2095cc HR |
1420 | struct fc_rport_priv *rdata = rdata_arg; |
1421 | struct fc_lport *lport = rdata->local_port; | |
079ecd8c JE |
1422 | |
1423 | FC_RPORT_ID_DBG(lport, fc_seq_exch(sp)->did, | |
1424 | "Received a LOGO %s\n", fc_els_resp_type(fp)); | |
4d2095cc HR |
1425 | if (!IS_ERR(fp)) |
1426 | fc_frame_free(fp); | |
1427 | kref_put(&rdata->kref, lport->tt.rport_destroy); | |
079ecd8c JE |
1428 | } |
1429 | ||
42e9a92f | 1430 | /** |
3a3b42bf RL |
1431 | * fc_rport_enter_logo() - Send a logout (LOGO) request |
1432 | * @rdata: The remote port to send the LOGO request to | |
42e9a92f RL |
1433 | * |
1434 | * Locking Note: The rport lock is expected to be held before calling | |
1435 | * this routine. | |
4d2095cc HR |
1436 | * |
1437 | * Reference counting: increments kref when sending ELS | |
42e9a92f | 1438 | */ |
9fb9d328 | 1439 | static void fc_rport_enter_logo(struct fc_rport_priv *rdata) |
42e9a92f | 1440 | { |
42e9a92f RL |
1441 | struct fc_lport *lport = rdata->local_port; |
1442 | struct fc_frame *fp; | |
1443 | ||
079ecd8c | 1444 | FC_RPORT_DBG(rdata, "Port sending LOGO from %s state\n", |
9fb9d328 | 1445 | fc_rport_state(rdata)); |
42e9a92f | 1446 | |
42e9a92f | 1447 | fp = fc_frame_alloc(lport, sizeof(struct fc_els_logo)); |
079ecd8c | 1448 | if (!fp) |
42e9a92f | 1449 | return; |
4d2095cc HR |
1450 | kref_get(&rdata->kref); |
1451 | if (!lport->tt.elsct_send(lport, rdata->ids.port_id, fp, ELS_LOGO, | |
1452 | fc_rport_logo_resp, rdata, 0)) | |
1453 | kref_put(&rdata->kref, lport->tt.rport_destroy); | |
42e9a92f RL |
1454 | } |
1455 | ||
370c3bd0 | 1456 | /** |
3a3b42bf RL |
1457 | * fc_rport_els_adisc_resp() - Handler for Address Discovery (ADISC) responses |
1458 | * @sp: The sequence the ADISC response was on | |
1459 | * @fp: The ADISC response frame | |
1460 | * @rdata_arg: The remote port that sent the ADISC response | |
370c3bd0 JE |
1461 | * |
1462 | * Locking Note: This function will be called without the rport lock | |
1463 | * held, but it will lock, call an _enter_* function or fc_rport_error | |
1464 | * and then unlock the rport. | |
1465 | */ | |
1466 | static void fc_rport_adisc_resp(struct fc_seq *sp, struct fc_frame *fp, | |
3a3b42bf | 1467 | void *rdata_arg) |
370c3bd0 JE |
1468 | { |
1469 | struct fc_rport_priv *rdata = rdata_arg; | |
1470 | struct fc_els_adisc *adisc; | |
1471 | u8 op; | |
1472 | ||
370c3bd0 JE |
1473 | FC_RPORT_DBG(rdata, "Received a ADISC response\n"); |
1474 | ||
785141c6 CD |
1475 | if (fp == ERR_PTR(-FC_EX_CLOSED)) |
1476 | goto put; | |
1477 | ||
1478 | mutex_lock(&rdata->rp_mutex); | |
1479 | ||
370c3bd0 JE |
1480 | if (rdata->rp_state != RPORT_ST_ADISC) { |
1481 | FC_RPORT_DBG(rdata, "Received a ADISC resp but in state %s\n", | |
1482 | fc_rport_state(rdata)); | |
1483 | if (IS_ERR(fp)) | |
1484 | goto err; | |
1485 | goto out; | |
1486 | } | |
1487 | ||
1488 | if (IS_ERR(fp)) { | |
9f9504a7 | 1489 | fc_rport_error(rdata, PTR_ERR(fp)); |
370c3bd0 JE |
1490 | goto err; |
1491 | } | |
1492 | ||
1493 | /* | |
1494 | * If address verification failed. Consider us logged out of the rport. | |
1495 | * Since the rport is still in discovery, we want to be | |
1496 | * logged in, so go to PLOGI state. Otherwise, go back to READY. | |
1497 | */ | |
1498 | op = fc_frame_payload_op(fp); | |
1499 | adisc = fc_frame_payload_get(fp, sizeof(*adisc)); | |
1500 | if (op != ELS_LS_ACC || !adisc || | |
1501 | ntoh24(adisc->adisc_port_id) != rdata->ids.port_id || | |
1502 | get_unaligned_be64(&adisc->adisc_wwpn) != rdata->ids.port_name || | |
1503 | get_unaligned_be64(&adisc->adisc_wwnn) != rdata->ids.node_name) { | |
1504 | FC_RPORT_DBG(rdata, "ADISC error or mismatch\n"); | |
a7b12a27 | 1505 | fc_rport_enter_flogi(rdata); |
370c3bd0 JE |
1506 | } else { |
1507 | FC_RPORT_DBG(rdata, "ADISC OK\n"); | |
1508 | fc_rport_enter_ready(rdata); | |
1509 | } | |
1510 | out: | |
1511 | fc_frame_free(fp); | |
1512 | err: | |
1513 | mutex_unlock(&rdata->rp_mutex); | |
785141c6 | 1514 | put: |
370c3bd0 JE |
1515 | kref_put(&rdata->kref, rdata->local_port->tt.rport_destroy); |
1516 | } | |
1517 | ||
1518 | /** | |
3a3b42bf RL |
1519 | * fc_rport_enter_adisc() - Send Address Discover (ADISC) request |
1520 | * @rdata: The remote port to send the ADISC request to | |
370c3bd0 JE |
1521 | * |
1522 | * Locking Note: The rport lock is expected to be held before calling | |
1523 | * this routine. | |
4d2095cc HR |
1524 | * |
1525 | * Reference counting: increments kref when sending ELS | |
370c3bd0 JE |
1526 | */ |
1527 | static void fc_rport_enter_adisc(struct fc_rport_priv *rdata) | |
1528 | { | |
1529 | struct fc_lport *lport = rdata->local_port; | |
1530 | struct fc_frame *fp; | |
1531 | ||
1532 | FC_RPORT_DBG(rdata, "sending ADISC from %s state\n", | |
1533 | fc_rport_state(rdata)); | |
1534 | ||
1535 | fc_rport_state_enter(rdata, RPORT_ST_ADISC); | |
1536 | ||
1537 | fp = fc_frame_alloc(lport, sizeof(struct fc_els_adisc)); | |
1538 | if (!fp) { | |
9f9504a7 | 1539 | fc_rport_error_retry(rdata, -FC_EX_ALLOC_ERR); |
370c3bd0 JE |
1540 | return; |
1541 | } | |
4d2095cc | 1542 | kref_get(&rdata->kref); |
370c3bd0 | 1543 | if (!lport->tt.elsct_send(lport, rdata->ids.port_id, fp, ELS_ADISC, |
b94f8951 | 1544 | fc_rport_adisc_resp, rdata, |
4d2095cc | 1545 | 2 * lport->r_a_tov)) { |
9f9504a7 | 1546 | fc_rport_error_retry(rdata, -FC_EX_XMIT_ERR); |
4d2095cc HR |
1547 | kref_put(&rdata->kref, lport->tt.rport_destroy); |
1548 | } | |
370c3bd0 JE |
1549 | } |
1550 | ||
8abbe3a4 | 1551 | /** |
3a3b42bf RL |
1552 | * fc_rport_recv_adisc_req() - Handler for Address Discovery (ADISC) requests |
1553 | * @rdata: The remote port that sent the ADISC request | |
3a3b42bf | 1554 | * @in_fp: The ADISC request frame |
8abbe3a4 JE |
1555 | * |
1556 | * Locking Note: Called with the lport and rport locks held. | |
1557 | */ | |
1558 | static void fc_rport_recv_adisc_req(struct fc_rport_priv *rdata, | |
92261156 | 1559 | struct fc_frame *in_fp) |
8abbe3a4 JE |
1560 | { |
1561 | struct fc_lport *lport = rdata->local_port; | |
1562 | struct fc_frame *fp; | |
8abbe3a4 JE |
1563 | struct fc_els_adisc *adisc; |
1564 | struct fc_seq_els_data rjt_data; | |
8abbe3a4 JE |
1565 | |
1566 | FC_RPORT_DBG(rdata, "Received ADISC request\n"); | |
1567 | ||
1568 | adisc = fc_frame_payload_get(in_fp, sizeof(*adisc)); | |
1569 | if (!adisc) { | |
8abbe3a4 JE |
1570 | rjt_data.reason = ELS_RJT_PROT; |
1571 | rjt_data.explan = ELS_EXPL_INV_LEN; | |
92261156 | 1572 | lport->tt.seq_els_rsp_send(in_fp, ELS_LS_RJT, &rjt_data); |
8abbe3a4 JE |
1573 | goto drop; |
1574 | } | |
1575 | ||
1576 | fp = fc_frame_alloc(lport, sizeof(*adisc)); | |
1577 | if (!fp) | |
1578 | goto drop; | |
1579 | fc_adisc_fill(lport, fp); | |
1580 | adisc = fc_frame_payload_get(fp, sizeof(*adisc)); | |
1581 | adisc->adisc_cmd = ELS_LS_ACC; | |
24f089e2 JE |
1582 | fc_fill_reply_hdr(fp, in_fp, FC_RCTL_ELS_REP, 0); |
1583 | lport->tt.frame_send(lport, fp); | |
8abbe3a4 JE |
1584 | drop: |
1585 | fc_frame_free(in_fp); | |
1586 | } | |
1587 | ||
63e27fb8 YZ |
1588 | /** |
1589 | * fc_rport_recv_rls_req() - Handle received Read Link Status request | |
1590 | * @rdata: The remote port that sent the RLS request | |
63e27fb8 YZ |
1591 | * @rx_fp: The PRLI request frame |
1592 | * | |
1593 | * Locking Note: The rport lock is expected to be held before calling | |
1594 | * this function. | |
1595 | */ | |
1596 | static void fc_rport_recv_rls_req(struct fc_rport_priv *rdata, | |
92261156 | 1597 | struct fc_frame *rx_fp) |
63e27fb8 YZ |
1598 | |
1599 | { | |
1600 | struct fc_lport *lport = rdata->local_port; | |
1601 | struct fc_frame *fp; | |
63e27fb8 YZ |
1602 | struct fc_els_rls *rls; |
1603 | struct fc_els_rls_resp *rsp; | |
1604 | struct fc_els_lesb *lesb; | |
1605 | struct fc_seq_els_data rjt_data; | |
1606 | struct fc_host_statistics *hst; | |
63e27fb8 YZ |
1607 | |
1608 | FC_RPORT_DBG(rdata, "Received RLS request while in state %s\n", | |
1609 | fc_rport_state(rdata)); | |
1610 | ||
1611 | rls = fc_frame_payload_get(rx_fp, sizeof(*rls)); | |
1612 | if (!rls) { | |
1613 | rjt_data.reason = ELS_RJT_PROT; | |
1614 | rjt_data.explan = ELS_EXPL_INV_LEN; | |
1615 | goto out_rjt; | |
1616 | } | |
1617 | ||
1618 | fp = fc_frame_alloc(lport, sizeof(*rsp)); | |
1619 | if (!fp) { | |
1620 | rjt_data.reason = ELS_RJT_UNAB; | |
1621 | rjt_data.explan = ELS_EXPL_INSUF_RES; | |
1622 | goto out_rjt; | |
1623 | } | |
1624 | ||
1625 | rsp = fc_frame_payload_get(fp, sizeof(*rsp)); | |
1626 | memset(rsp, 0, sizeof(*rsp)); | |
1627 | rsp->rls_cmd = ELS_LS_ACC; | |
1628 | lesb = &rsp->rls_lesb; | |
1629 | if (lport->tt.get_lesb) { | |
1630 | /* get LESB from LLD if it supports it */ | |
1631 | lport->tt.get_lesb(lport, lesb); | |
1632 | } else { | |
1633 | fc_get_host_stats(lport->host); | |
1634 | hst = &lport->host_stats; | |
1635 | lesb->lesb_link_fail = htonl(hst->link_failure_count); | |
1636 | lesb->lesb_sync_loss = htonl(hst->loss_of_sync_count); | |
1637 | lesb->lesb_sig_loss = htonl(hst->loss_of_signal_count); | |
1638 | lesb->lesb_prim_err = htonl(hst->prim_seq_protocol_err_count); | |
1639 | lesb->lesb_inv_word = htonl(hst->invalid_tx_word_count); | |
1640 | lesb->lesb_inv_crc = htonl(hst->invalid_crc_count); | |
1641 | } | |
1642 | ||
24f089e2 JE |
1643 | fc_fill_reply_hdr(fp, rx_fp, FC_RCTL_ELS_REP, 0); |
1644 | lport->tt.frame_send(lport, fp); | |
63e27fb8 YZ |
1645 | goto out; |
1646 | ||
1647 | out_rjt: | |
92261156 | 1648 | lport->tt.seq_els_rsp_send(rx_fp, ELS_LS_RJT, &rjt_data); |
63e27fb8 YZ |
1649 | out: |
1650 | fc_frame_free(rx_fp); | |
1651 | } | |
1652 | ||
42e9a92f | 1653 | /** |
3a3b42bf RL |
1654 | * fc_rport_recv_els_req() - Handler for validated ELS requests |
1655 | * @lport: The local port that received the ELS request | |
3a3b42bf | 1656 | * @fp: The ELS request frame |
83fe6a93 JE |
1657 | * |
1658 | * Handle incoming ELS requests that require port login. | |
1659 | * The ELS opcode has already been validated by the caller. | |
42e9a92f | 1660 | * |
131203a1 | 1661 | * Locking Note: Called with the lport lock held. |
4d2095cc HR |
1662 | * |
1663 | * Reference counting: does not modify kref | |
42e9a92f | 1664 | */ |
92261156 | 1665 | static void fc_rport_recv_els_req(struct fc_lport *lport, struct fc_frame *fp) |
42e9a92f | 1666 | { |
131203a1 | 1667 | struct fc_rport_priv *rdata; |
42e9a92f | 1668 | struct fc_seq_els_data els_data; |
42e9a92f | 1669 | |
251748a9 | 1670 | rdata = lport->tt.rport_lookup(lport, fc_frame_sid(fp)); |
57d3ec7e HR |
1671 | if (!rdata) { |
1672 | FC_RPORT_ID_DBG(lport, fc_frame_sid(fp), | |
1673 | "Received ELS 0x%02x from non-logged-in port\n", | |
1674 | fc_frame_payload_op(fp)); | |
83fe6a93 | 1675 | goto reject; |
57d3ec7e | 1676 | } |
baa6719f | 1677 | |
131203a1 JE |
1678 | mutex_lock(&rdata->rp_mutex); |
1679 | ||
83fe6a93 JE |
1680 | switch (rdata->rp_state) { |
1681 | case RPORT_ST_PRLI: | |
1682 | case RPORT_ST_RTV: | |
1683 | case RPORT_ST_READY: | |
370c3bd0 | 1684 | case RPORT_ST_ADISC: |
83fe6a93 JE |
1685 | break; |
1686 | default: | |
57d3ec7e HR |
1687 | FC_RPORT_DBG(rdata, |
1688 | "Reject ELS 0x%02x while in state %s\n", | |
1689 | fc_frame_payload_op(fp), fc_rport_state(rdata)); | |
83fe6a93 | 1690 | mutex_unlock(&rdata->rp_mutex); |
baa6719f | 1691 | kref_put(&rdata->kref, lport->tt.rport_destroy); |
83fe6a93 JE |
1692 | goto reject; |
1693 | } | |
1694 | ||
1695 | switch (fc_frame_payload_op(fp)) { | |
131203a1 | 1696 | case ELS_PRLI: |
92261156 | 1697 | fc_rport_recv_prli_req(rdata, fp); |
131203a1 JE |
1698 | break; |
1699 | case ELS_PRLO: | |
92261156 | 1700 | fc_rport_recv_prlo_req(rdata, fp); |
131203a1 | 1701 | break; |
8abbe3a4 | 1702 | case ELS_ADISC: |
92261156 | 1703 | fc_rport_recv_adisc_req(rdata, fp); |
8abbe3a4 | 1704 | break; |
131203a1 | 1705 | case ELS_RRQ: |
92261156 JE |
1706 | lport->tt.seq_els_rsp_send(fp, ELS_RRQ, NULL); |
1707 | fc_frame_free(fp); | |
131203a1 JE |
1708 | break; |
1709 | case ELS_REC: | |
92261156 JE |
1710 | lport->tt.seq_els_rsp_send(fp, ELS_REC, NULL); |
1711 | fc_frame_free(fp); | |
131203a1 | 1712 | break; |
63e27fb8 | 1713 | case ELS_RLS: |
92261156 | 1714 | fc_rport_recv_rls_req(rdata, fp); |
63e27fb8 | 1715 | break; |
7c5a51b8 HR |
1716 | case ELS_RTV: |
1717 | fc_rport_recv_rtv_req(rdata, fp); | |
1718 | break; | |
131203a1 | 1719 | default: |
83fe6a93 | 1720 | fc_frame_free(fp); /* can't happen */ |
131203a1 | 1721 | break; |
42e9a92f RL |
1722 | } |
1723 | ||
1724 | mutex_unlock(&rdata->rp_mutex); | |
baa6719f | 1725 | kref_put(&rdata->kref, rdata->local_port->tt.rport_destroy); |
83fe6a93 JE |
1726 | return; |
1727 | ||
1728 | reject: | |
92261156 JE |
1729 | els_data.reason = ELS_RJT_UNAB; |
1730 | els_data.explan = ELS_EXPL_PLOGI_REQD; | |
1731 | lport->tt.seq_els_rsp_send(fp, ELS_LS_RJT, &els_data); | |
83fe6a93 JE |
1732 | fc_frame_free(fp); |
1733 | } | |
1734 | ||
1735 | /** | |
3a3b42bf | 1736 | * fc_rport_recv_req() - Handler for requests |
3a3b42bf | 1737 | * @lport: The local port that received the request |
92261156 | 1738 | * @fp: The request frame |
83fe6a93 JE |
1739 | * |
1740 | * Locking Note: Called with the lport lock held. | |
4d2095cc HR |
1741 | * |
1742 | * Reference counting: does not modify kref | |
83fe6a93 | 1743 | */ |
c6b21c93 | 1744 | static void fc_rport_recv_req(struct fc_lport *lport, struct fc_frame *fp) |
83fe6a93 JE |
1745 | { |
1746 | struct fc_seq_els_data els_data; | |
1747 | ||
1748 | /* | |
a7b12a27 | 1749 | * Handle FLOGI, PLOGI and LOGO requests separately, since they |
83fe6a93 JE |
1750 | * don't require prior login. |
1751 | * Check for unsupported opcodes first and reject them. | |
1752 | * For some ops, it would be incorrect to reject with "PLOGI required". | |
1753 | */ | |
1754 | switch (fc_frame_payload_op(fp)) { | |
a7b12a27 | 1755 | case ELS_FLOGI: |
92261156 | 1756 | fc_rport_recv_flogi_req(lport, fp); |
a7b12a27 | 1757 | break; |
83fe6a93 | 1758 | case ELS_PLOGI: |
92261156 | 1759 | fc_rport_recv_plogi_req(lport, fp); |
83fe6a93 JE |
1760 | break; |
1761 | case ELS_LOGO: | |
92261156 | 1762 | fc_rport_recv_logo_req(lport, fp); |
83fe6a93 JE |
1763 | break; |
1764 | case ELS_PRLI: | |
1765 | case ELS_PRLO: | |
8abbe3a4 | 1766 | case ELS_ADISC: |
83fe6a93 JE |
1767 | case ELS_RRQ: |
1768 | case ELS_REC: | |
63e27fb8 | 1769 | case ELS_RLS: |
7c5a51b8 | 1770 | case ELS_RTV: |
92261156 | 1771 | fc_rport_recv_els_req(lport, fp); |
83fe6a93 JE |
1772 | break; |
1773 | default: | |
83fe6a93 JE |
1774 | els_data.reason = ELS_RJT_UNSUP; |
1775 | els_data.explan = ELS_EXPL_NONE; | |
92261156 JE |
1776 | lport->tt.seq_els_rsp_send(fp, ELS_LS_RJT, &els_data); |
1777 | fc_frame_free(fp); | |
83fe6a93 JE |
1778 | break; |
1779 | } | |
42e9a92f RL |
1780 | } |
1781 | ||
1782 | /** | |
3a3b42bf RL |
1783 | * fc_rport_recv_plogi_req() - Handler for Port Login (PLOGI) requests |
1784 | * @lport: The local port that received the PLOGI request | |
3a3b42bf | 1785 | * @rx_fp: The PLOGI request frame |
42e9a92f | 1786 | * |
3ac6f98f | 1787 | * Locking Note: The rport lock is held before calling this function. |
4d2095cc HR |
1788 | * |
1789 | * Reference counting: increments kref on return | |
42e9a92f | 1790 | */ |
3ac6f98f | 1791 | static void fc_rport_recv_plogi_req(struct fc_lport *lport, |
92261156 | 1792 | struct fc_frame *rx_fp) |
42e9a92f | 1793 | { |
3ac6f98f JE |
1794 | struct fc_disc *disc; |
1795 | struct fc_rport_priv *rdata; | |
42e9a92f | 1796 | struct fc_frame *fp = rx_fp; |
42e9a92f RL |
1797 | struct fc_els_flogi *pl; |
1798 | struct fc_seq_els_data rjt_data; | |
24f089e2 | 1799 | u32 sid; |
42e9a92f | 1800 | |
251748a9 | 1801 | sid = fc_frame_sid(fp); |
42e9a92f | 1802 | |
3ac6f98f | 1803 | FC_RPORT_ID_DBG(lport, sid, "Received PLOGI request\n"); |
42e9a92f | 1804 | |
42e9a92f RL |
1805 | pl = fc_frame_payload_get(fp, sizeof(*pl)); |
1806 | if (!pl) { | |
3ac6f98f JE |
1807 | FC_RPORT_ID_DBG(lport, sid, "Received PLOGI too short\n"); |
1808 | rjt_data.reason = ELS_RJT_PROT; | |
1809 | rjt_data.explan = ELS_EXPL_INV_LEN; | |
1810 | goto reject; | |
42e9a92f | 1811 | } |
3ac6f98f JE |
1812 | |
1813 | disc = &lport->disc; | |
1814 | mutex_lock(&disc->disc_mutex); | |
1815 | rdata = lport->tt.rport_create(lport, sid); | |
1816 | if (!rdata) { | |
1817 | mutex_unlock(&disc->disc_mutex); | |
1818 | rjt_data.reason = ELS_RJT_UNAB; | |
1819 | rjt_data.explan = ELS_EXPL_INSUF_RES; | |
1820 | goto reject; | |
1821 | } | |
1822 | ||
1823 | mutex_lock(&rdata->rp_mutex); | |
1824 | mutex_unlock(&disc->disc_mutex); | |
1825 | ||
1826 | rdata->ids.port_name = get_unaligned_be64(&pl->fl_wwpn); | |
1827 | rdata->ids.node_name = get_unaligned_be64(&pl->fl_wwnn); | |
42e9a92f RL |
1828 | |
1829 | /* | |
3ac6f98f | 1830 | * If the rport was just created, possibly due to the incoming PLOGI, |
42e9a92f RL |
1831 | * set the state appropriately and accept the PLOGI. |
1832 | * | |
1833 | * If we had also sent a PLOGI, and if the received PLOGI is from a | |
1834 | * higher WWPN, we accept it, otherwise an LS_RJT is sent with reason | |
1835 | * "command already in progress". | |
1836 | * | |
1837 | * XXX TBD: If the session was ready before, the PLOGI should result in | |
1838 | * all outstanding exchanges being reset. | |
1839 | */ | |
1840 | switch (rdata->rp_state) { | |
1841 | case RPORT_ST_INIT: | |
3ac6f98f | 1842 | FC_RPORT_DBG(rdata, "Received PLOGI in INIT state\n"); |
42e9a92f | 1843 | break; |
a7b12a27 JE |
1844 | case RPORT_ST_PLOGI_WAIT: |
1845 | FC_RPORT_DBG(rdata, "Received PLOGI in PLOGI_WAIT state\n"); | |
1846 | break; | |
42e9a92f | 1847 | case RPORT_ST_PLOGI: |
3ac6f98f JE |
1848 | FC_RPORT_DBG(rdata, "Received PLOGI in PLOGI state\n"); |
1849 | if (rdata->ids.port_name < lport->wwpn) { | |
1850 | mutex_unlock(&rdata->rp_mutex); | |
1851 | rjt_data.reason = ELS_RJT_INPROG; | |
1852 | rjt_data.explan = ELS_EXPL_NONE; | |
1853 | goto reject; | |
1854 | } | |
42e9a92f RL |
1855 | break; |
1856 | case RPORT_ST_PRLI: | |
b4a9c7ed | 1857 | case RPORT_ST_RTV: |
42e9a92f | 1858 | case RPORT_ST_READY: |
370c3bd0 JE |
1859 | case RPORT_ST_ADISC: |
1860 | FC_RPORT_DBG(rdata, "Received PLOGI in logged-in state %d " | |
1861 | "- ignored for now\n", rdata->rp_state); | |
1862 | /* XXX TBD - should reset */ | |
42e9a92f | 1863 | break; |
a7b12a27 | 1864 | case RPORT_ST_FLOGI: |
14194054 | 1865 | case RPORT_ST_DELETE: |
b4a9c7ed JE |
1866 | FC_RPORT_DBG(rdata, "Received PLOGI in state %s - send busy\n", |
1867 | fc_rport_state(rdata)); | |
1868 | mutex_unlock(&rdata->rp_mutex); | |
1869 | rjt_data.reason = ELS_RJT_BUSY; | |
1870 | rjt_data.explan = ELS_EXPL_NONE; | |
1871 | goto reject; | |
42e9a92f | 1872 | } |
e0335f67 MR |
1873 | if (!fc_rport_compatible_roles(lport, rdata)) { |
1874 | FC_RPORT_DBG(rdata, "Received PLOGI for incompatible role\n"); | |
1875 | mutex_unlock(&rdata->rp_mutex); | |
1876 | rjt_data.reason = ELS_RJT_LOGIC; | |
1877 | rjt_data.explan = ELS_EXPL_NONE; | |
1878 | goto reject; | |
1879 | } | |
42e9a92f | 1880 | |
3ac6f98f JE |
1881 | /* |
1882 | * Get session payload size from incoming PLOGI. | |
1883 | */ | |
1884 | rdata->maxframe_size = fc_plogi_get_maxframe(pl, lport->mfs); | |
3ac6f98f JE |
1885 | |
1886 | /* | |
1887 | * Send LS_ACC. If this fails, the originator should retry. | |
1888 | */ | |
3ac6f98f JE |
1889 | fp = fc_frame_alloc(lport, sizeof(*pl)); |
1890 | if (!fp) | |
1891 | goto out; | |
1892 | ||
1893 | fc_plogi_fill(lport, fp, ELS_LS_ACC); | |
24f089e2 JE |
1894 | fc_fill_reply_hdr(fp, rx_fp, FC_RCTL_ELS_REP, 0); |
1895 | lport->tt.frame_send(lport, fp); | |
3ac6f98f JE |
1896 | fc_rport_enter_prli(rdata); |
1897 | out: | |
1898 | mutex_unlock(&rdata->rp_mutex); | |
24f089e2 | 1899 | fc_frame_free(rx_fp); |
3ac6f98f JE |
1900 | return; |
1901 | ||
1902 | reject: | |
92261156 | 1903 | lport->tt.seq_els_rsp_send(fp, ELS_LS_RJT, &rjt_data); |
3ac6f98f | 1904 | fc_frame_free(fp); |
42e9a92f RL |
1905 | } |
1906 | ||
1907 | /** | |
3a3b42bf RL |
1908 | * fc_rport_recv_prli_req() - Handler for process login (PRLI) requests |
1909 | * @rdata: The remote port that sent the PRLI request | |
3a3b42bf | 1910 | * @rx_fp: The PRLI request frame |
42e9a92f | 1911 | * |
c1d45424 | 1912 | * Locking Note: The rport lock is expected to be held before calling |
42e9a92f RL |
1913 | * this function. |
1914 | */ | |
9fb9d328 | 1915 | static void fc_rport_recv_prli_req(struct fc_rport_priv *rdata, |
92261156 | 1916 | struct fc_frame *rx_fp) |
42e9a92f | 1917 | { |
42e9a92f | 1918 | struct fc_lport *lport = rdata->local_port; |
42e9a92f | 1919 | struct fc_frame *fp; |
42e9a92f RL |
1920 | struct { |
1921 | struct fc_els_prli prli; | |
1922 | struct fc_els_spp spp; | |
1923 | } *pp; | |
1924 | struct fc_els_spp *rspp; /* request service param page */ | |
1925 | struct fc_els_spp *spp; /* response spp */ | |
1926 | unsigned int len; | |
1927 | unsigned int plen; | |
42e9a92f | 1928 | enum fc_els_spp_resp resp; |
96ad8464 | 1929 | enum fc_els_spp_resp passive; |
42e9a92f | 1930 | struct fc_seq_els_data rjt_data; |
96ad8464 | 1931 | struct fc4_prov *prov; |
42e9a92f | 1932 | |
9fb9d328 JE |
1933 | FC_RPORT_DBG(rdata, "Received PRLI request while in state %s\n", |
1934 | fc_rport_state(rdata)); | |
42e9a92f | 1935 | |
251748a9 | 1936 | len = fr_len(rx_fp) - sizeof(struct fc_frame_header); |
42e9a92f | 1937 | pp = fc_frame_payload_get(rx_fp, sizeof(*pp)); |
a2f6a024 JE |
1938 | if (!pp) |
1939 | goto reject_len; | |
1940 | plen = ntohs(pp->prli.prli_len); | |
1941 | if ((plen % 4) != 0 || plen > len || plen < 16) | |
1942 | goto reject_len; | |
1943 | if (plen < len) | |
1944 | len = plen; | |
1945 | plen = pp->prli.prli_spp_len; | |
1946 | if ((plen % 4) != 0 || plen < sizeof(*spp) || | |
1947 | plen > len || len < sizeof(*pp) || plen < 12) | |
1948 | goto reject_len; | |
1949 | rspp = &pp->spp; | |
1950 | ||
1951 | fp = fc_frame_alloc(lport, len); | |
1952 | if (!fp) { | |
1953 | rjt_data.reason = ELS_RJT_UNAB; | |
1954 | rjt_data.explan = ELS_EXPL_INSUF_RES; | |
1955 | goto reject; | |
42e9a92f | 1956 | } |
a2f6a024 JE |
1957 | pp = fc_frame_payload_get(fp, len); |
1958 | WARN_ON(!pp); | |
1959 | memset(pp, 0, len); | |
1960 | pp->prli.prli_cmd = ELS_LS_ACC; | |
1961 | pp->prli.prli_spp_len = plen; | |
1962 | pp->prli.prli_len = htons(len); | |
1963 | len -= sizeof(struct fc_els_prli); | |
42e9a92f | 1964 | |
a2f6a024 JE |
1965 | /* |
1966 | * Go through all the service parameter pages and build | |
1967 | * response. If plen indicates longer SPP than standard, | |
1968 | * use that. The entire response has been pre-cleared above. | |
1969 | */ | |
1970 | spp = &pp->spp; | |
96ad8464 | 1971 | mutex_lock(&fc_prov_mutex); |
a2f6a024 | 1972 | while (len >= plen) { |
75a2792d | 1973 | rdata->spp_type = rspp->spp_type; |
a2f6a024 JE |
1974 | spp->spp_type = rspp->spp_type; |
1975 | spp->spp_type_ext = rspp->spp_type_ext; | |
96ad8464 JE |
1976 | resp = 0; |
1977 | ||
1978 | if (rspp->spp_type < FC_FC4_PROV_SIZE) { | |
1979 | prov = fc_active_prov[rspp->spp_type]; | |
1980 | if (prov) | |
1981 | resp = prov->prli(rdata, plen, rspp, spp); | |
1982 | prov = fc_passive_prov[rspp->spp_type]; | |
1983 | if (prov) { | |
1984 | passive = prov->prli(rdata, plen, rspp, spp); | |
1985 | if (!resp || passive == FC_SPP_RESP_ACK) | |
1986 | resp = passive; | |
1987 | } | |
1988 | } | |
1989 | if (!resp) { | |
1990 | if (spp->spp_flags & FC_SPP_EST_IMG_PAIR) | |
1991 | resp |= FC_SPP_RESP_CONF; | |
1992 | else | |
1993 | resp |= FC_SPP_RESP_INVL; | |
42e9a92f | 1994 | } |
a2f6a024 JE |
1995 | spp->spp_flags |= resp; |
1996 | len -= plen; | |
1997 | rspp = (struct fc_els_spp *)((char *)rspp + plen); | |
1998 | spp = (struct fc_els_spp *)((char *)spp + plen); | |
1999 | } | |
96ad8464 | 2000 | mutex_unlock(&fc_prov_mutex); |
a2f6a024 JE |
2001 | |
2002 | /* | |
2003 | * Send LS_ACC. If this fails, the originator should retry. | |
2004 | */ | |
24f089e2 JE |
2005 | fc_fill_reply_hdr(fp, rx_fp, FC_RCTL_ELS_REP, 0); |
2006 | lport->tt.frame_send(lport, fp); | |
a2f6a024 JE |
2007 | |
2008 | switch (rdata->rp_state) { | |
2009 | case RPORT_ST_PRLI: | |
2010 | fc_rport_enter_ready(rdata); | |
2011 | break; | |
2012 | default: | |
2013 | break; | |
42e9a92f | 2014 | } |
a2f6a024 JE |
2015 | goto drop; |
2016 | ||
2017 | reject_len: | |
2018 | rjt_data.reason = ELS_RJT_PROT; | |
2019 | rjt_data.explan = ELS_EXPL_INV_LEN; | |
2020 | reject: | |
92261156 | 2021 | lport->tt.seq_els_rsp_send(rx_fp, ELS_LS_RJT, &rjt_data); |
a2f6a024 | 2022 | drop: |
42e9a92f RL |
2023 | fc_frame_free(rx_fp); |
2024 | } | |
2025 | ||
2026 | /** | |
3a3b42bf RL |
2027 | * fc_rport_recv_prlo_req() - Handler for process logout (PRLO) requests |
2028 | * @rdata: The remote port that sent the PRLO request | |
f8fc6c2c | 2029 | * @rx_fp: The PRLO request frame |
42e9a92f | 2030 | * |
c1d45424 | 2031 | * Locking Note: The rport lock is expected to be held before calling |
42e9a92f RL |
2032 | * this function. |
2033 | */ | |
9fb9d328 | 2034 | static void fc_rport_recv_prlo_req(struct fc_rport_priv *rdata, |
f8fc6c2c | 2035 | struct fc_frame *rx_fp) |
42e9a92f | 2036 | { |
42e9a92f | 2037 | struct fc_lport *lport = rdata->local_port; |
f8fc6c2c BPG |
2038 | struct fc_frame *fp; |
2039 | struct { | |
2040 | struct fc_els_prlo prlo; | |
2041 | struct fc_els_spp spp; | |
2042 | } *pp; | |
2043 | struct fc_els_spp *rspp; /* request service param page */ | |
2044 | struct fc_els_spp *spp; /* response spp */ | |
2045 | unsigned int len; | |
2046 | unsigned int plen; | |
42e9a92f RL |
2047 | struct fc_seq_els_data rjt_data; |
2048 | ||
9fb9d328 JE |
2049 | FC_RPORT_DBG(rdata, "Received PRLO request while in state %s\n", |
2050 | fc_rport_state(rdata)); | |
42e9a92f | 2051 | |
251748a9 | 2052 | len = fr_len(rx_fp) - sizeof(struct fc_frame_header); |
f8fc6c2c BPG |
2053 | pp = fc_frame_payload_get(rx_fp, sizeof(*pp)); |
2054 | if (!pp) | |
2055 | goto reject_len; | |
2056 | plen = ntohs(pp->prlo.prlo_len); | |
2057 | if (plen != 20) | |
2058 | goto reject_len; | |
2059 | if (plen < len) | |
2060 | len = plen; | |
2061 | ||
2062 | rspp = &pp->spp; | |
2063 | ||
2064 | fp = fc_frame_alloc(lport, len); | |
2065 | if (!fp) { | |
2066 | rjt_data.reason = ELS_RJT_UNAB; | |
2067 | rjt_data.explan = ELS_EXPL_INSUF_RES; | |
2068 | goto reject; | |
2069 | } | |
2070 | ||
f8fc6c2c BPG |
2071 | pp = fc_frame_payload_get(fp, len); |
2072 | WARN_ON(!pp); | |
2073 | memset(pp, 0, len); | |
2074 | pp->prlo.prlo_cmd = ELS_LS_ACC; | |
2075 | pp->prlo.prlo_obs = 0x10; | |
2076 | pp->prlo.prlo_len = htons(len); | |
2077 | spp = &pp->spp; | |
2078 | spp->spp_type = rspp->spp_type; | |
2079 | spp->spp_type_ext = rspp->spp_type_ext; | |
2080 | spp->spp_flags = FC_SPP_RESP_ACK; | |
2081 | ||
166f310b | 2082 | fc_rport_enter_prli(rdata); |
f8fc6c2c | 2083 | |
92261156 JE |
2084 | fc_fill_reply_hdr(fp, rx_fp, FC_RCTL_ELS_REP, 0); |
2085 | lport->tt.frame_send(lport, fp); | |
f8fc6c2c BPG |
2086 | goto drop; |
2087 | ||
2088 | reject_len: | |
2089 | rjt_data.reason = ELS_RJT_PROT; | |
2090 | rjt_data.explan = ELS_EXPL_INV_LEN; | |
2091 | reject: | |
92261156 | 2092 | lport->tt.seq_els_rsp_send(rx_fp, ELS_LS_RJT, &rjt_data); |
f8fc6c2c BPG |
2093 | drop: |
2094 | fc_frame_free(rx_fp); | |
42e9a92f RL |
2095 | } |
2096 | ||
2097 | /** | |
3a3b42bf RL |
2098 | * fc_rport_recv_logo_req() - Handler for logout (LOGO) requests |
2099 | * @lport: The local port that received the LOGO request | |
3a3b42bf | 2100 | * @fp: The LOGO request frame |
42e9a92f | 2101 | * |
c1d45424 | 2102 | * Locking Note: The rport lock is expected to be held before calling |
42e9a92f | 2103 | * this function. |
4d2095cc HR |
2104 | * |
2105 | * Reference counting: drops kref on return | |
42e9a92f | 2106 | */ |
92261156 | 2107 | static void fc_rport_recv_logo_req(struct fc_lport *lport, struct fc_frame *fp) |
42e9a92f | 2108 | { |
83fe6a93 JE |
2109 | struct fc_rport_priv *rdata; |
2110 | u32 sid; | |
42e9a92f | 2111 | |
92261156 | 2112 | lport->tt.seq_els_rsp_send(fp, ELS_LS_ACC, NULL); |
feab4ae7 | 2113 | |
251748a9 | 2114 | sid = fc_frame_sid(fp); |
42e9a92f | 2115 | |
83fe6a93 JE |
2116 | rdata = lport->tt.rport_lookup(lport, sid); |
2117 | if (rdata) { | |
2118 | mutex_lock(&rdata->rp_mutex); | |
2119 | FC_RPORT_DBG(rdata, "Received LOGO request while in state %s\n", | |
2120 | fc_rport_state(rdata)); | |
feab4ae7 | 2121 | |
649eb869 | 2122 | fc_rport_enter_delete(rdata, RPORT_EV_STOP); |
83fe6a93 | 2123 | mutex_unlock(&rdata->rp_mutex); |
baa6719f | 2124 | kref_put(&rdata->kref, rdata->local_port->tt.rport_destroy); |
83fe6a93 JE |
2125 | } else |
2126 | FC_RPORT_ID_DBG(lport, sid, | |
2127 | "Received LOGO from non-logged-in port\n"); | |
42e9a92f RL |
2128 | fc_frame_free(fp); |
2129 | } | |
2130 | ||
3a3b42bf RL |
2131 | /** |
2132 | * fc_rport_flush_queue() - Flush the rport_event_queue | |
2133 | */ | |
42e9a92f RL |
2134 | static void fc_rport_flush_queue(void) |
2135 | { | |
2136 | flush_workqueue(rport_event_queue); | |
2137 | } | |
2138 | ||
3a3b42bf RL |
2139 | /** |
2140 | * fc_rport_init() - Initialize the remote port layer for a local port | |
2141 | * @lport: The local port to initialize the remote port layer for | |
2142 | */ | |
42e9a92f RL |
2143 | int fc_rport_init(struct fc_lport *lport) |
2144 | { | |
8025b5db JE |
2145 | if (!lport->tt.rport_lookup) |
2146 | lport->tt.rport_lookup = fc_rport_lookup; | |
2147 | ||
5101ff99 | 2148 | if (!lport->tt.rport_create) |
9e9d0452 | 2149 | lport->tt.rport_create = fc_rport_create; |
5101ff99 | 2150 | |
42e9a92f RL |
2151 | if (!lport->tt.rport_login) |
2152 | lport->tt.rport_login = fc_rport_login; | |
2153 | ||
2154 | if (!lport->tt.rport_logoff) | |
2155 | lport->tt.rport_logoff = fc_rport_logoff; | |
2156 | ||
2157 | if (!lport->tt.rport_recv_req) | |
2158 | lport->tt.rport_recv_req = fc_rport_recv_req; | |
2159 | ||
2160 | if (!lport->tt.rport_flush_queue) | |
2161 | lport->tt.rport_flush_queue = fc_rport_flush_queue; | |
2162 | ||
f211fa51 JE |
2163 | if (!lport->tt.rport_destroy) |
2164 | lport->tt.rport_destroy = fc_rport_destroy; | |
2165 | ||
42e9a92f RL |
2166 | return 0; |
2167 | } | |
2168 | EXPORT_SYMBOL(fc_rport_init); | |
2169 | ||
96ad8464 JE |
2170 | /** |
2171 | * fc_rport_fcp_prli() - Handle incoming PRLI for the FCP initiator. | |
2172 | * @rdata: remote port private | |
2173 | * @spp_len: service parameter page length | |
2174 | * @rspp: received service parameter page | |
2175 | * @spp: response service parameter page | |
2176 | * | |
2177 | * Returns the value for the response code to be placed in spp_flags; | |
2178 | * Returns 0 if not an initiator. | |
2179 | */ | |
2180 | static int fc_rport_fcp_prli(struct fc_rport_priv *rdata, u32 spp_len, | |
2181 | const struct fc_els_spp *rspp, | |
2182 | struct fc_els_spp *spp) | |
2183 | { | |
2184 | struct fc_lport *lport = rdata->local_port; | |
2185 | u32 fcp_parm; | |
2186 | ||
2187 | fcp_parm = ntohl(rspp->spp_params); | |
2188 | rdata->ids.roles = FC_RPORT_ROLE_UNKNOWN; | |
2189 | if (fcp_parm & FCP_SPPF_INIT_FCN) | |
2190 | rdata->ids.roles |= FC_RPORT_ROLE_FCP_INITIATOR; | |
2191 | if (fcp_parm & FCP_SPPF_TARG_FCN) | |
2192 | rdata->ids.roles |= FC_RPORT_ROLE_FCP_TARGET; | |
2193 | if (fcp_parm & FCP_SPPF_RETRY) | |
2194 | rdata->flags |= FC_RP_FLAGS_RETRY; | |
2195 | rdata->supported_classes = FC_COS_CLASS3; | |
2196 | ||
732bdb9d | 2197 | if (!(lport->service_params & FCP_SPPF_INIT_FCN)) |
96ad8464 JE |
2198 | return 0; |
2199 | ||
2200 | spp->spp_flags |= rspp->spp_flags & FC_SPP_EST_IMG_PAIR; | |
2201 | ||
2202 | /* | |
2203 | * OR in our service parameters with other providers (target), if any. | |
2204 | */ | |
2205 | fcp_parm = ntohl(spp->spp_params); | |
2206 | spp->spp_params = htonl(fcp_parm | lport->service_params); | |
2207 | return FC_SPP_RESP_ACK; | |
2208 | } | |
2209 | ||
2210 | /* | |
2211 | * FC-4 provider ops for FCP initiator. | |
2212 | */ | |
2213 | struct fc4_prov fc_rport_fcp_init = { | |
2214 | .prli = fc_rport_fcp_prli, | |
2215 | }; | |
2216 | ||
2217 | /** | |
2218 | * fc_rport_t0_prli() - Handle incoming PRLI parameters for type 0 | |
2219 | * @rdata: remote port private | |
2220 | * @spp_len: service parameter page length | |
2221 | * @rspp: received service parameter page | |
2222 | * @spp: response service parameter page | |
2223 | */ | |
2224 | static int fc_rport_t0_prli(struct fc_rport_priv *rdata, u32 spp_len, | |
2225 | const struct fc_els_spp *rspp, | |
2226 | struct fc_els_spp *spp) | |
2227 | { | |
2228 | if (rspp->spp_flags & FC_SPP_EST_IMG_PAIR) | |
2229 | return FC_SPP_RESP_INVL; | |
2230 | return FC_SPP_RESP_ACK; | |
2231 | } | |
2232 | ||
2233 | /* | |
2234 | * FC-4 provider ops for type 0 service parameters. | |
2235 | * | |
2236 | * This handles the special case of type 0 which is always successful | |
2237 | * but doesn't do anything otherwise. | |
2238 | */ | |
2239 | struct fc4_prov fc_rport_t0_prov = { | |
2240 | .prli = fc_rport_t0_prli, | |
2241 | }; | |
2242 | ||
3a3b42bf RL |
2243 | /** |
2244 | * fc_setup_rport() - Initialize the rport_event_queue | |
2245 | */ | |
55204909 | 2246 | int fc_setup_rport(void) |
42e9a92f RL |
2247 | { |
2248 | rport_event_queue = create_singlethread_workqueue("fc_rport_eq"); | |
2249 | if (!rport_event_queue) | |
2250 | return -ENOMEM; | |
2251 | return 0; | |
2252 | } | |
42e9a92f | 2253 | |
3a3b42bf RL |
2254 | /** |
2255 | * fc_destroy_rport() - Destroy the rport_event_queue | |
2256 | */ | |
55204909 | 2257 | void fc_destroy_rport(void) |
42e9a92f RL |
2258 | { |
2259 | destroy_workqueue(rport_event_queue); | |
2260 | } | |
42e9a92f | 2261 | |
3a3b42bf RL |
2262 | /** |
2263 | * fc_rport_terminate_io() - Stop all outstanding I/O on a remote port | |
2264 | * @rport: The remote port whose I/O should be terminated | |
2265 | */ | |
42e9a92f RL |
2266 | void fc_rport_terminate_io(struct fc_rport *rport) |
2267 | { | |
3a3b42bf RL |
2268 | struct fc_rport_libfc_priv *rpriv = rport->dd_data; |
2269 | struct fc_lport *lport = rpriv->local_port; | |
42e9a92f | 2270 | |
1f6ff364 AJ |
2271 | lport->tt.exch_mgr_reset(lport, 0, rport->port_id); |
2272 | lport->tt.exch_mgr_reset(lport, rport->port_id, 0); | |
42e9a92f RL |
2273 | } |
2274 | EXPORT_SYMBOL(fc_rport_terminate_io); |