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42e9a92f RL |
1 | /* |
2 | * Copyright(c) 2007 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 | * PORT LOCKING NOTES | |
22 | * | |
23 | * These comments only apply to the 'port code' which consists of the lport, | |
24 | * disc and rport blocks. | |
25 | * | |
26 | * MOTIVATION | |
27 | * | |
28 | * The lport, disc and rport blocks all have mutexes that are used to protect | |
29 | * those objects. The main motivation for these locks is to prevent from | |
30 | * having an lport reset just before we send a frame. In that scenario the | |
31 | * lport's FID would get set to zero and then we'd send a frame with an | |
32 | * invalid SID. We also need to ensure that states don't change unexpectedly | |
33 | * while processing another state. | |
34 | * | |
35 | * HEIRARCHY | |
36 | * | |
37 | * The following heirarchy defines the locking rules. A greater lock | |
38 | * may be held before acquiring a lesser lock, but a lesser lock should never | |
39 | * be held while attempting to acquire a greater lock. Here is the heirarchy- | |
40 | * | |
41 | * lport > disc, lport > rport, disc > rport | |
42 | * | |
43 | * CALLBACKS | |
44 | * | |
45 | * The callbacks cause complications with this scheme. There is a callback | |
46 | * from the rport (to either lport or disc) and a callback from disc | |
47 | * (to the lport). | |
48 | * | |
49 | * As rports exit the rport state machine a callback is made to the owner of | |
50 | * the rport to notify success or failure. Since the callback is likely to | |
51 | * cause the lport or disc to grab its lock we cannot hold the rport lock | |
52 | * while making the callback. To ensure that the rport is not free'd while | |
53 | * processing the callback the rport callbacks are serialized through a | |
54 | * single-threaded workqueue. An rport would never be free'd while in a | |
55 | * callback handler becuase no other rport work in this queue can be executed | |
56 | * at the same time. | |
57 | * | |
58 | * When discovery succeeds or fails a callback is made to the lport as | |
59 | * notification. Currently, succesful discovery causes the lport to take no | |
60 | * action. A failure will cause the lport to reset. There is likely a circular | |
61 | * locking problem with this implementation. | |
62 | */ | |
63 | ||
64 | /* | |
65 | * LPORT LOCKING | |
66 | * | |
67 | * The critical sections protected by the lport's mutex are quite broad and | |
68 | * may be improved upon in the future. The lport code and its locking doesn't | |
69 | * influence the I/O path, so excessive locking doesn't penalize I/O | |
70 | * performance. | |
71 | * | |
72 | * The strategy is to lock whenever processing a request or response. Note | |
73 | * that every _enter_* function corresponds to a state change. They generally | |
74 | * change the lports state and then send a request out on the wire. We lock | |
75 | * before calling any of these functions to protect that state change. This | |
76 | * means that the entry points into the lport block manage the locks while | |
77 | * the state machine can transition between states (i.e. _enter_* functions) | |
78 | * while always staying protected. | |
79 | * | |
80 | * When handling responses we also hold the lport mutex broadly. When the | |
81 | * lport receives the response frame it locks the mutex and then calls the | |
82 | * appropriate handler for the particuar response. Generally a response will | |
83 | * trigger a state change and so the lock must already be held. | |
84 | * | |
85 | * Retries also have to consider the locking. The retries occur from a work | |
86 | * context and the work function will lock the lport and then retry the state | |
87 | * (i.e. _enter_* function). | |
88 | */ | |
89 | ||
90 | #include <linux/timer.h> | |
91 | #include <asm/unaligned.h> | |
92 | ||
93 | #include <scsi/fc/fc_gs.h> | |
94 | ||
95 | #include <scsi/libfc.h> | |
96 | #include <scsi/fc_encode.h> | |
97 | ||
8866a5d9 RL |
98 | #include "fc_libfc.h" |
99 | ||
42e9a92f RL |
100 | /* Fabric IDs to use for point-to-point mode, chosen on whims. */ |
101 | #define FC_LOCAL_PTP_FID_LO 0x010101 | |
102 | #define FC_LOCAL_PTP_FID_HI 0x010102 | |
103 | ||
104 | #define DNS_DELAY 3 /* Discovery delay after RSCN (in seconds)*/ | |
105 | ||
42e9a92f RL |
106 | static void fc_lport_error(struct fc_lport *, struct fc_frame *); |
107 | ||
108 | static void fc_lport_enter_reset(struct fc_lport *); | |
109 | static void fc_lport_enter_flogi(struct fc_lport *); | |
110 | static void fc_lport_enter_dns(struct fc_lport *); | |
c9c7bd7a | 111 | static void fc_lport_enter_rnn_id(struct fc_lport *); |
5baa17c3 | 112 | static void fc_lport_enter_rsnn_nn(struct fc_lport *); |
c9866a54 | 113 | static void fc_lport_enter_rspn_id(struct fc_lport *); |
42e9a92f RL |
114 | static void fc_lport_enter_rft_id(struct fc_lport *); |
115 | static void fc_lport_enter_scr(struct fc_lport *); | |
116 | static void fc_lport_enter_ready(struct fc_lport *); | |
117 | static void fc_lport_enter_logo(struct fc_lport *); | |
118 | ||
119 | static const char *fc_lport_state_names[] = { | |
b1d9fd55 | 120 | [LPORT_ST_DISABLED] = "disabled", |
42e9a92f RL |
121 | [LPORT_ST_FLOGI] = "FLOGI", |
122 | [LPORT_ST_DNS] = "dNS", | |
c9c7bd7a | 123 | [LPORT_ST_RNN_ID] = "RNN_ID", |
5baa17c3 | 124 | [LPORT_ST_RSNN_NN] = "RSNN_NN", |
c9866a54 | 125 | [LPORT_ST_RSPN_ID] = "RSPN_ID", |
42e9a92f RL |
126 | [LPORT_ST_RFT_ID] = "RFT_ID", |
127 | [LPORT_ST_SCR] = "SCR", | |
128 | [LPORT_ST_READY] = "Ready", | |
129 | [LPORT_ST_LOGO] = "LOGO", | |
130 | [LPORT_ST_RESET] = "reset", | |
131 | }; | |
132 | ||
133 | static int fc_frame_drop(struct fc_lport *lport, struct fc_frame *fp) | |
134 | { | |
135 | fc_frame_free(fp); | |
136 | return 0; | |
137 | } | |
138 | ||
139 | /** | |
34f42a07 | 140 | * fc_lport_rport_callback() - Event handler for rport events |
42e9a92f | 141 | * @lport: The lport which is receiving the event |
9fb9d328 | 142 | * @rdata: private remote port data |
42e9a92f RL |
143 | * @event: The event that occured |
144 | * | |
145 | * Locking Note: The rport lock should not be held when calling | |
146 | * this function. | |
147 | */ | |
148 | static void fc_lport_rport_callback(struct fc_lport *lport, | |
9fb9d328 | 149 | struct fc_rport_priv *rdata, |
42e9a92f RL |
150 | enum fc_rport_event event) |
151 | { | |
7414705e | 152 | FC_LPORT_DBG(lport, "Received a %d event for port (%6x)\n", event, |
f211fa51 | 153 | rdata->ids.port_id); |
42e9a92f | 154 | |
b5cbf083 | 155 | mutex_lock(&lport->lp_mutex); |
42e9a92f | 156 | switch (event) { |
4c0f62b5 | 157 | case RPORT_EV_READY: |
b5cbf083 JE |
158 | if (lport->state == LPORT_ST_DNS) { |
159 | lport->dns_rp = rdata; | |
c9c7bd7a | 160 | fc_lport_enter_rnn_id(lport); |
b5cbf083 JE |
161 | } else { |
162 | FC_LPORT_DBG(lport, "Received an READY event " | |
163 | "on port (%6x) for the directory " | |
164 | "server, but the lport is not " | |
165 | "in the DNS state, it's in the " | |
166 | "%d state", rdata->ids.port_id, | |
167 | lport->state); | |
168 | lport->tt.rport_logoff(rdata); | |
169 | } | |
42e9a92f RL |
170 | break; |
171 | case RPORT_EV_LOGO: | |
172 | case RPORT_EV_FAILED: | |
173 | case RPORT_EV_STOP: | |
b5cbf083 | 174 | lport->dns_rp = NULL; |
42e9a92f RL |
175 | break; |
176 | case RPORT_EV_NONE: | |
177 | break; | |
178 | } | |
b5cbf083 | 179 | mutex_unlock(&lport->lp_mutex); |
42e9a92f RL |
180 | } |
181 | ||
182 | /** | |
34f42a07 | 183 | * fc_lport_state() - Return a string which represents the lport's state |
42e9a92f RL |
184 | * @lport: The lport whose state is to converted to a string |
185 | */ | |
186 | static const char *fc_lport_state(struct fc_lport *lport) | |
187 | { | |
188 | const char *cp; | |
189 | ||
190 | cp = fc_lport_state_names[lport->state]; | |
191 | if (!cp) | |
192 | cp = "unknown"; | |
193 | return cp; | |
194 | } | |
195 | ||
196 | /** | |
34f42a07 | 197 | * fc_lport_ptp_setup() - Create an rport for point-to-point mode |
42e9a92f RL |
198 | * @lport: The lport to attach the ptp rport to |
199 | * @fid: The FID of the ptp rport | |
200 | * @remote_wwpn: The WWPN of the ptp rport | |
201 | * @remote_wwnn: The WWNN of the ptp rport | |
202 | */ | |
203 | static void fc_lport_ptp_setup(struct fc_lport *lport, | |
204 | u32 remote_fid, u64 remote_wwpn, | |
205 | u64 remote_wwnn) | |
206 | { | |
48f00902 JE |
207 | mutex_lock(&lport->disc.disc_mutex); |
208 | if (lport->ptp_rp) | |
42e9a92f | 209 | lport->tt.rport_logoff(lport->ptp_rp); |
9737e6a7 RL |
210 | lport->ptp_rp = lport->tt.rport_create(lport, remote_fid); |
211 | lport->ptp_rp->ids.port_name = remote_wwpn; | |
212 | lport->ptp_rp->ids.node_name = remote_wwnn; | |
48f00902 | 213 | mutex_unlock(&lport->disc.disc_mutex); |
42e9a92f RL |
214 | |
215 | lport->tt.rport_login(lport->ptp_rp); | |
216 | ||
217 | fc_lport_enter_ready(lport); | |
218 | } | |
219 | ||
220 | void fc_get_host_port_type(struct Scsi_Host *shost) | |
221 | { | |
222 | /* TODO - currently just NPORT */ | |
223 | fc_host_port_type(shost) = FC_PORTTYPE_NPORT; | |
224 | } | |
225 | EXPORT_SYMBOL(fc_get_host_port_type); | |
226 | ||
227 | void fc_get_host_port_state(struct Scsi_Host *shost) | |
228 | { | |
229 | struct fc_lport *lp = shost_priv(shost); | |
230 | ||
8faecddb CL |
231 | mutex_lock(&lp->lp_mutex); |
232 | if (!lp->link_up) | |
233 | fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN; | |
42e9a92f | 234 | else |
8faecddb CL |
235 | switch (lp->state) { |
236 | case LPORT_ST_READY: | |
237 | fc_host_port_state(shost) = FC_PORTSTATE_ONLINE; | |
238 | break; | |
239 | default: | |
240 | fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE; | |
241 | } | |
242 | mutex_unlock(&lp->lp_mutex); | |
42e9a92f RL |
243 | } |
244 | EXPORT_SYMBOL(fc_get_host_port_state); | |
245 | ||
246 | void fc_get_host_speed(struct Scsi_Host *shost) | |
247 | { | |
248 | struct fc_lport *lport = shost_priv(shost); | |
249 | ||
250 | fc_host_speed(shost) = lport->link_speed; | |
251 | } | |
252 | EXPORT_SYMBOL(fc_get_host_speed); | |
253 | ||
254 | struct fc_host_statistics *fc_get_host_stats(struct Scsi_Host *shost) | |
255 | { | |
42e9a92f RL |
256 | struct fc_host_statistics *fcoe_stats; |
257 | struct fc_lport *lp = shost_priv(shost); | |
258 | struct timespec v0, v1; | |
582b45bc | 259 | unsigned int cpu; |
42e9a92f RL |
260 | |
261 | fcoe_stats = &lp->host_stats; | |
262 | memset(fcoe_stats, 0, sizeof(struct fc_host_statistics)); | |
263 | ||
264 | jiffies_to_timespec(jiffies, &v0); | |
265 | jiffies_to_timespec(lp->boot_time, &v1); | |
266 | fcoe_stats->seconds_since_last_reset = (v0.tv_sec - v1.tv_sec); | |
267 | ||
582b45bc RL |
268 | for_each_possible_cpu(cpu) { |
269 | struct fcoe_dev_stats *stats; | |
270 | ||
271 | stats = per_cpu_ptr(lp->dev_stats, cpu); | |
272 | ||
42e9a92f RL |
273 | fcoe_stats->tx_frames += stats->TxFrames; |
274 | fcoe_stats->tx_words += stats->TxWords; | |
275 | fcoe_stats->rx_frames += stats->RxFrames; | |
276 | fcoe_stats->rx_words += stats->RxWords; | |
277 | fcoe_stats->error_frames += stats->ErrorFrames; | |
278 | fcoe_stats->invalid_crc_count += stats->InvalidCRCCount; | |
279 | fcoe_stats->fcp_input_requests += stats->InputRequests; | |
280 | fcoe_stats->fcp_output_requests += stats->OutputRequests; | |
281 | fcoe_stats->fcp_control_requests += stats->ControlRequests; | |
282 | fcoe_stats->fcp_input_megabytes += stats->InputMegabytes; | |
283 | fcoe_stats->fcp_output_megabytes += stats->OutputMegabytes; | |
284 | fcoe_stats->link_failure_count += stats->LinkFailureCount; | |
285 | } | |
286 | fcoe_stats->lip_count = -1; | |
287 | fcoe_stats->nos_count = -1; | |
288 | fcoe_stats->loss_of_sync_count = -1; | |
289 | fcoe_stats->loss_of_signal_count = -1; | |
290 | fcoe_stats->prim_seq_protocol_err_count = -1; | |
291 | fcoe_stats->dumped_frames = -1; | |
292 | return fcoe_stats; | |
293 | } | |
294 | EXPORT_SYMBOL(fc_get_host_stats); | |
295 | ||
296 | /* | |
297 | * Fill in FLOGI command for request. | |
298 | */ | |
299 | static void | |
300 | fc_lport_flogi_fill(struct fc_lport *lport, struct fc_els_flogi *flogi, | |
301 | unsigned int op) | |
302 | { | |
303 | struct fc_els_csp *sp; | |
304 | struct fc_els_cssp *cp; | |
305 | ||
306 | memset(flogi, 0, sizeof(*flogi)); | |
307 | flogi->fl_cmd = (u8) op; | |
308 | put_unaligned_be64(lport->wwpn, &flogi->fl_wwpn); | |
309 | put_unaligned_be64(lport->wwnn, &flogi->fl_wwnn); | |
310 | sp = &flogi->fl_csp; | |
311 | sp->sp_hi_ver = 0x20; | |
312 | sp->sp_lo_ver = 0x20; | |
313 | sp->sp_bb_cred = htons(10); /* this gets set by gateway */ | |
314 | sp->sp_bb_data = htons((u16) lport->mfs); | |
315 | cp = &flogi->fl_cssp[3 - 1]; /* class 3 parameters */ | |
316 | cp->cp_class = htons(FC_CPC_VALID | FC_CPC_SEQ); | |
317 | if (op != ELS_FLOGI) { | |
318 | sp->sp_features = htons(FC_SP_FT_CIRO); | |
319 | sp->sp_tot_seq = htons(255); /* seq. we accept */ | |
320 | sp->sp_rel_off = htons(0x1f); | |
321 | sp->sp_e_d_tov = htonl(lport->e_d_tov); | |
322 | ||
323 | cp->cp_rdfs = htons((u16) lport->mfs); | |
324 | cp->cp_con_seq = htons(255); | |
325 | cp->cp_open_seq = 1; | |
326 | } | |
327 | } | |
328 | ||
329 | /* | |
330 | * Add a supported FC-4 type. | |
331 | */ | |
332 | static void fc_lport_add_fc4_type(struct fc_lport *lport, enum fc_fh_type type) | |
333 | { | |
334 | __be32 *mp; | |
335 | ||
336 | mp = &lport->fcts.ff_type_map[type / FC_NS_BPW]; | |
337 | *mp = htonl(ntohl(*mp) | 1UL << (type % FC_NS_BPW)); | |
338 | } | |
339 | ||
340 | /** | |
34f42a07 | 341 | * fc_lport_recv_rlir_req() - Handle received Registered Link Incident Report. |
42e9a92f RL |
342 | * @lport: Fibre Channel local port recieving the RLIR |
343 | * @sp: current sequence in the RLIR exchange | |
344 | * @fp: RLIR request frame | |
345 | * | |
1b69bc06 | 346 | * Locking Note: The lport lock is expected to be held before calling |
42e9a92f RL |
347 | * this function. |
348 | */ | |
349 | static void fc_lport_recv_rlir_req(struct fc_seq *sp, struct fc_frame *fp, | |
350 | struct fc_lport *lport) | |
351 | { | |
7414705e RL |
352 | FC_LPORT_DBG(lport, "Received RLIR request while in state %s\n", |
353 | fc_lport_state(lport)); | |
42e9a92f RL |
354 | |
355 | lport->tt.seq_els_rsp_send(sp, ELS_LS_ACC, NULL); | |
356 | fc_frame_free(fp); | |
357 | } | |
358 | ||
359 | /** | |
34f42a07 | 360 | * fc_lport_recv_echo_req() - Handle received ECHO request |
42e9a92f RL |
361 | * @lport: Fibre Channel local port recieving the ECHO |
362 | * @sp: current sequence in the ECHO exchange | |
363 | * @fp: ECHO request frame | |
364 | * | |
1b69bc06 | 365 | * Locking Note: The lport lock is expected to be held before calling |
42e9a92f RL |
366 | * this function. |
367 | */ | |
368 | static void fc_lport_recv_echo_req(struct fc_seq *sp, struct fc_frame *in_fp, | |
369 | struct fc_lport *lport) | |
370 | { | |
371 | struct fc_frame *fp; | |
372 | struct fc_exch *ep = fc_seq_exch(sp); | |
373 | unsigned int len; | |
374 | void *pp; | |
375 | void *dp; | |
376 | u32 f_ctl; | |
377 | ||
1b69bc06 | 378 | FC_LPORT_DBG(lport, "Received ECHO request while in state %s\n", |
7414705e | 379 | fc_lport_state(lport)); |
42e9a92f RL |
380 | |
381 | len = fr_len(in_fp) - sizeof(struct fc_frame_header); | |
382 | pp = fc_frame_payload_get(in_fp, len); | |
383 | ||
384 | if (len < sizeof(__be32)) | |
385 | len = sizeof(__be32); | |
386 | ||
387 | fp = fc_frame_alloc(lport, len); | |
388 | if (fp) { | |
389 | dp = fc_frame_payload_get(fp, len); | |
390 | memcpy(dp, pp, len); | |
1b69bc06 | 391 | *((__be32 *)dp) = htonl(ELS_LS_ACC << 24); |
42e9a92f RL |
392 | sp = lport->tt.seq_start_next(sp); |
393 | f_ctl = FC_FC_EX_CTX | FC_FC_LAST_SEQ | FC_FC_END_SEQ; | |
394 | fc_fill_fc_hdr(fp, FC_RCTL_ELS_REP, ep->did, ep->sid, | |
395 | FC_TYPE_ELS, f_ctl, 0); | |
396 | lport->tt.seq_send(lport, sp, fp); | |
397 | } | |
398 | fc_frame_free(in_fp); | |
399 | } | |
400 | ||
401 | /** | |
1b69bc06 JE |
402 | * fc_lport_recv_rnid_req() - Handle received Request Node ID data request |
403 | * @sp: The sequence in the RNID exchange | |
404 | * @fp: The RNID request frame | |
405 | * @lport: The local port recieving the RNID | |
42e9a92f | 406 | * |
1b69bc06 | 407 | * Locking Note: The lport lock is expected to be held before calling |
42e9a92f RL |
408 | * this function. |
409 | */ | |
410 | static void fc_lport_recv_rnid_req(struct fc_seq *sp, struct fc_frame *in_fp, | |
411 | struct fc_lport *lport) | |
412 | { | |
413 | struct fc_frame *fp; | |
414 | struct fc_exch *ep = fc_seq_exch(sp); | |
415 | struct fc_els_rnid *req; | |
416 | struct { | |
417 | struct fc_els_rnid_resp rnid; | |
418 | struct fc_els_rnid_cid cid; | |
419 | struct fc_els_rnid_gen gen; | |
420 | } *rp; | |
421 | struct fc_seq_els_data rjt_data; | |
422 | u8 fmt; | |
423 | size_t len; | |
424 | u32 f_ctl; | |
425 | ||
7414705e RL |
426 | FC_LPORT_DBG(lport, "Received RNID request while in state %s\n", |
427 | fc_lport_state(lport)); | |
42e9a92f RL |
428 | |
429 | req = fc_frame_payload_get(in_fp, sizeof(*req)); | |
430 | if (!req) { | |
431 | rjt_data.fp = NULL; | |
432 | rjt_data.reason = ELS_RJT_LOGIC; | |
433 | rjt_data.explan = ELS_EXPL_NONE; | |
434 | lport->tt.seq_els_rsp_send(sp, ELS_LS_RJT, &rjt_data); | |
435 | } else { | |
436 | fmt = req->rnid_fmt; | |
437 | len = sizeof(*rp); | |
438 | if (fmt != ELS_RNIDF_GEN || | |
439 | ntohl(lport->rnid_gen.rnid_atype) == 0) { | |
440 | fmt = ELS_RNIDF_NONE; /* nothing to provide */ | |
441 | len -= sizeof(rp->gen); | |
442 | } | |
443 | fp = fc_frame_alloc(lport, len); | |
444 | if (fp) { | |
445 | rp = fc_frame_payload_get(fp, len); | |
446 | memset(rp, 0, len); | |
447 | rp->rnid.rnid_cmd = ELS_LS_ACC; | |
448 | rp->rnid.rnid_fmt = fmt; | |
449 | rp->rnid.rnid_cid_len = sizeof(rp->cid); | |
450 | rp->cid.rnid_wwpn = htonll(lport->wwpn); | |
451 | rp->cid.rnid_wwnn = htonll(lport->wwnn); | |
452 | if (fmt == ELS_RNIDF_GEN) { | |
453 | rp->rnid.rnid_sid_len = sizeof(rp->gen); | |
454 | memcpy(&rp->gen, &lport->rnid_gen, | |
455 | sizeof(rp->gen)); | |
456 | } | |
457 | sp = lport->tt.seq_start_next(sp); | |
458 | f_ctl = FC_FC_EX_CTX | FC_FC_LAST_SEQ; | |
459 | f_ctl |= FC_FC_END_SEQ | FC_FC_SEQ_INIT; | |
460 | fc_fill_fc_hdr(fp, FC_RCTL_ELS_REP, ep->did, ep->sid, | |
461 | FC_TYPE_ELS, f_ctl, 0); | |
462 | lport->tt.seq_send(lport, sp, fp); | |
463 | } | |
464 | } | |
465 | fc_frame_free(in_fp); | |
466 | } | |
467 | ||
42e9a92f | 468 | /** |
34f42a07 | 469 | * fc_lport_recv_logo_req() - Handle received fabric LOGO request |
42e9a92f RL |
470 | * @lport: Fibre Channel local port recieving the LOGO |
471 | * @sp: current sequence in the LOGO exchange | |
472 | * @fp: LOGO request frame | |
473 | * | |
474 | * Locking Note: The lport lock is exected to be held before calling | |
475 | * this function. | |
476 | */ | |
477 | static void fc_lport_recv_logo_req(struct fc_seq *sp, struct fc_frame *fp, | |
478 | struct fc_lport *lport) | |
479 | { | |
480 | lport->tt.seq_els_rsp_send(sp, ELS_LS_ACC, NULL); | |
481 | fc_lport_enter_reset(lport); | |
482 | fc_frame_free(fp); | |
483 | } | |
484 | ||
485 | /** | |
34f42a07 | 486 | * fc_fabric_login() - Start the lport state machine |
42e9a92f RL |
487 | * @lport: The lport that should log into the fabric |
488 | * | |
489 | * Locking Note: This function should not be called | |
490 | * with the lport lock held. | |
491 | */ | |
492 | int fc_fabric_login(struct fc_lport *lport) | |
493 | { | |
494 | int rc = -1; | |
495 | ||
496 | mutex_lock(&lport->lp_mutex); | |
b1d9fd55 | 497 | if (lport->state == LPORT_ST_DISABLED) { |
42e9a92f RL |
498 | fc_lport_enter_reset(lport); |
499 | rc = 0; | |
500 | } | |
501 | mutex_unlock(&lport->lp_mutex); | |
502 | ||
503 | return rc; | |
504 | } | |
505 | EXPORT_SYMBOL(fc_fabric_login); | |
506 | ||
507 | /** | |
8faecddb | 508 | * __fc_linkup() - Handler for transport linkup events |
42e9a92f | 509 | * @lport: The lport whose link is up |
8faecddb CL |
510 | * |
511 | * Locking: must be called with the lp_mutex held | |
42e9a92f | 512 | */ |
8faecddb | 513 | void __fc_linkup(struct fc_lport *lport) |
42e9a92f | 514 | { |
bc0e17f6 VD |
515 | if (!lport->link_up) { |
516 | lport->link_up = 1; | |
42e9a92f RL |
517 | |
518 | if (lport->state == LPORT_ST_RESET) | |
519 | fc_lport_enter_flogi(lport); | |
520 | } | |
8faecddb CL |
521 | } |
522 | ||
523 | /** | |
524 | * fc_linkup() - Handler for transport linkup events | |
525 | * @lport: The lport whose link is up | |
526 | */ | |
527 | void fc_linkup(struct fc_lport *lport) | |
528 | { | |
529 | printk(KERN_INFO "libfc: Link up on port (%6x)\n", | |
530 | fc_host_port_id(lport->host)); | |
531 | ||
532 | mutex_lock(&lport->lp_mutex); | |
533 | __fc_linkup(lport); | |
42e9a92f RL |
534 | mutex_unlock(&lport->lp_mutex); |
535 | } | |
536 | EXPORT_SYMBOL(fc_linkup); | |
537 | ||
538 | /** | |
8faecddb | 539 | * __fc_linkdown() - Handler for transport linkdown events |
42e9a92f | 540 | * @lport: The lport whose link is down |
8faecddb CL |
541 | * |
542 | * Locking: must be called with the lp_mutex held | |
42e9a92f | 543 | */ |
8faecddb | 544 | void __fc_linkdown(struct fc_lport *lport) |
42e9a92f | 545 | { |
bc0e17f6 VD |
546 | if (lport->link_up) { |
547 | lport->link_up = 0; | |
42e9a92f RL |
548 | fc_lport_enter_reset(lport); |
549 | lport->tt.fcp_cleanup(lport); | |
550 | } | |
8faecddb CL |
551 | } |
552 | ||
553 | /** | |
554 | * fc_linkdown() - Handler for transport linkdown events | |
555 | * @lport: The lport whose link is down | |
556 | */ | |
557 | void fc_linkdown(struct fc_lport *lport) | |
558 | { | |
559 | printk(KERN_INFO "libfc: Link down on port (%6x)\n", | |
560 | fc_host_port_id(lport->host)); | |
561 | ||
562 | mutex_lock(&lport->lp_mutex); | |
563 | __fc_linkdown(lport); | |
42e9a92f RL |
564 | mutex_unlock(&lport->lp_mutex); |
565 | } | |
566 | EXPORT_SYMBOL(fc_linkdown); | |
567 | ||
42e9a92f | 568 | /** |
34f42a07 | 569 | * fc_fabric_logoff() - Logout of the fabric |
42e9a92f RL |
570 | * @lport: fc_lport pointer to logoff the fabric |
571 | * | |
572 | * Return value: | |
573 | * 0 for success, -1 for failure | |
34f42a07 | 574 | */ |
42e9a92f RL |
575 | int fc_fabric_logoff(struct fc_lport *lport) |
576 | { | |
577 | lport->tt.disc_stop_final(lport); | |
578 | mutex_lock(&lport->lp_mutex); | |
a0fd2e49 AJ |
579 | if (lport->dns_rp) |
580 | lport->tt.rport_logoff(lport->dns_rp); | |
581 | mutex_unlock(&lport->lp_mutex); | |
582 | lport->tt.rport_flush_queue(); | |
583 | mutex_lock(&lport->lp_mutex); | |
42e9a92f RL |
584 | fc_lport_enter_logo(lport); |
585 | mutex_unlock(&lport->lp_mutex); | |
f7db2c15 | 586 | cancel_delayed_work_sync(&lport->retry_work); |
42e9a92f RL |
587 | return 0; |
588 | } | |
589 | EXPORT_SYMBOL(fc_fabric_logoff); | |
590 | ||
591 | /** | |
34f42a07 | 592 | * fc_lport_destroy() - unregister a fc_lport |
42e9a92f RL |
593 | * @lport: fc_lport pointer to unregister |
594 | * | |
595 | * Return value: | |
596 | * None | |
597 | * Note: | |
598 | * exit routine for fc_lport instance | |
599 | * clean-up all the allocated memory | |
600 | * and free up other system resources. | |
601 | * | |
34f42a07 | 602 | */ |
42e9a92f RL |
603 | int fc_lport_destroy(struct fc_lport *lport) |
604 | { | |
bbf15669 | 605 | mutex_lock(&lport->lp_mutex); |
b1d9fd55 | 606 | lport->state = LPORT_ST_DISABLED; |
bbf15669 | 607 | lport->link_up = 0; |
42e9a92f | 608 | lport->tt.frame_send = fc_frame_drop; |
bbf15669 AJ |
609 | mutex_unlock(&lport->lp_mutex); |
610 | ||
42e9a92f | 611 | lport->tt.fcp_abort_io(lport); |
e9ba8b42 | 612 | lport->tt.disc_stop_final(lport); |
1f6ff364 | 613 | lport->tt.exch_mgr_reset(lport, 0, 0); |
42e9a92f RL |
614 | return 0; |
615 | } | |
616 | EXPORT_SYMBOL(fc_lport_destroy); | |
617 | ||
618 | /** | |
34f42a07 | 619 | * fc_set_mfs() - sets up the mfs for the corresponding fc_lport |
42e9a92f RL |
620 | * @lport: fc_lport pointer to unregister |
621 | * @mfs: the new mfs for fc_lport | |
622 | * | |
623 | * Set mfs for the given fc_lport to the new mfs. | |
624 | * | |
625 | * Return: 0 for success | |
34f42a07 | 626 | */ |
42e9a92f RL |
627 | int fc_set_mfs(struct fc_lport *lport, u32 mfs) |
628 | { | |
629 | unsigned int old_mfs; | |
630 | int rc = -EINVAL; | |
631 | ||
632 | mutex_lock(&lport->lp_mutex); | |
633 | ||
634 | old_mfs = lport->mfs; | |
635 | ||
636 | if (mfs >= FC_MIN_MAX_FRAME) { | |
637 | mfs &= ~3; | |
638 | if (mfs > FC_MAX_FRAME) | |
639 | mfs = FC_MAX_FRAME; | |
640 | mfs -= sizeof(struct fc_frame_header); | |
641 | lport->mfs = mfs; | |
642 | rc = 0; | |
643 | } | |
644 | ||
645 | if (!rc && mfs < old_mfs) | |
646 | fc_lport_enter_reset(lport); | |
647 | ||
648 | mutex_unlock(&lport->lp_mutex); | |
649 | ||
650 | return rc; | |
651 | } | |
652 | EXPORT_SYMBOL(fc_set_mfs); | |
653 | ||
654 | /** | |
34f42a07 | 655 | * fc_lport_disc_callback() - Callback for discovery events |
42e9a92f RL |
656 | * @lport: FC local port |
657 | * @event: The discovery event | |
658 | */ | |
659 | void fc_lport_disc_callback(struct fc_lport *lport, enum fc_disc_event event) | |
660 | { | |
661 | switch (event) { | |
662 | case DISC_EV_SUCCESS: | |
7414705e | 663 | FC_LPORT_DBG(lport, "Discovery succeeded\n"); |
42e9a92f RL |
664 | break; |
665 | case DISC_EV_FAILED: | |
7414705e RL |
666 | printk(KERN_ERR "libfc: Discovery failed for port (%6x)\n", |
667 | fc_host_port_id(lport->host)); | |
42e9a92f RL |
668 | mutex_lock(&lport->lp_mutex); |
669 | fc_lport_enter_reset(lport); | |
670 | mutex_unlock(&lport->lp_mutex); | |
671 | break; | |
672 | case DISC_EV_NONE: | |
673 | WARN_ON(1); | |
674 | break; | |
675 | } | |
676 | } | |
677 | ||
678 | /** | |
34f42a07 | 679 | * fc_rport_enter_ready() - Enter the ready state and start discovery |
42e9a92f RL |
680 | * @lport: Fibre Channel local port that is ready |
681 | * | |
682 | * Locking Note: The lport lock is expected to be held before calling | |
683 | * this routine. | |
684 | */ | |
685 | static void fc_lport_enter_ready(struct fc_lport *lport) | |
686 | { | |
7414705e RL |
687 | FC_LPORT_DBG(lport, "Entered READY from state %s\n", |
688 | fc_lport_state(lport)); | |
42e9a92f RL |
689 | |
690 | fc_lport_state_enter(lport, LPORT_ST_READY); | |
8faecddb CL |
691 | if (lport->vport) |
692 | fc_vport_set_state(lport->vport, FC_VPORT_ACTIVE); | |
693 | fc_vports_linkchange(lport); | |
42e9a92f | 694 | |
29d898e9 JE |
695 | if (!lport->ptp_rp) |
696 | lport->tt.disc_start(fc_lport_disc_callback, lport); | |
42e9a92f RL |
697 | } |
698 | ||
699 | /** | |
34f42a07 | 700 | * fc_lport_recv_flogi_req() - Receive a FLOGI request |
42e9a92f RL |
701 | * @sp_in: The sequence the FLOGI is on |
702 | * @rx_fp: The frame the FLOGI is in | |
703 | * @lport: The lport that recieved the request | |
704 | * | |
705 | * A received FLOGI request indicates a point-to-point connection. | |
706 | * Accept it with the common service parameters indicating our N port. | |
707 | * Set up to do a PLOGI if we have the higher-number WWPN. | |
708 | * | |
1b69bc06 | 709 | * Locking Note: The lport lock is expected to be held before calling |
42e9a92f RL |
710 | * this function. |
711 | */ | |
712 | static void fc_lport_recv_flogi_req(struct fc_seq *sp_in, | |
713 | struct fc_frame *rx_fp, | |
714 | struct fc_lport *lport) | |
715 | { | |
716 | struct fc_frame *fp; | |
717 | struct fc_frame_header *fh; | |
718 | struct fc_seq *sp; | |
719 | struct fc_exch *ep; | |
720 | struct fc_els_flogi *flp; | |
721 | struct fc_els_flogi *new_flp; | |
722 | u64 remote_wwpn; | |
723 | u32 remote_fid; | |
724 | u32 local_fid; | |
725 | u32 f_ctl; | |
726 | ||
7414705e RL |
727 | FC_LPORT_DBG(lport, "Received FLOGI request while in state %s\n", |
728 | fc_lport_state(lport)); | |
42e9a92f RL |
729 | |
730 | fh = fc_frame_header_get(rx_fp); | |
731 | remote_fid = ntoh24(fh->fh_s_id); | |
732 | flp = fc_frame_payload_get(rx_fp, sizeof(*flp)); | |
733 | if (!flp) | |
734 | goto out; | |
735 | remote_wwpn = get_unaligned_be64(&flp->fl_wwpn); | |
736 | if (remote_wwpn == lport->wwpn) { | |
7414705e RL |
737 | printk(KERN_WARNING "libfc: Received FLOGI from port " |
738 | "with same WWPN %llx\n", remote_wwpn); | |
42e9a92f RL |
739 | goto out; |
740 | } | |
7414705e | 741 | FC_LPORT_DBG(lport, "FLOGI from port WWPN %llx\n", remote_wwpn); |
42e9a92f RL |
742 | |
743 | /* | |
744 | * XXX what is the right thing to do for FIDs? | |
745 | * The originator might expect our S_ID to be 0xfffffe. | |
746 | * But if so, both of us could end up with the same FID. | |
747 | */ | |
748 | local_fid = FC_LOCAL_PTP_FID_LO; | |
749 | if (remote_wwpn < lport->wwpn) { | |
750 | local_fid = FC_LOCAL_PTP_FID_HI; | |
751 | if (!remote_fid || remote_fid == local_fid) | |
752 | remote_fid = FC_LOCAL_PTP_FID_LO; | |
753 | } else if (!remote_fid) { | |
754 | remote_fid = FC_LOCAL_PTP_FID_HI; | |
755 | } | |
756 | ||
757 | fc_host_port_id(lport->host) = local_fid; | |
758 | ||
759 | fp = fc_frame_alloc(lport, sizeof(*flp)); | |
760 | if (fp) { | |
761 | sp = lport->tt.seq_start_next(fr_seq(rx_fp)); | |
762 | new_flp = fc_frame_payload_get(fp, sizeof(*flp)); | |
763 | fc_lport_flogi_fill(lport, new_flp, ELS_FLOGI); | |
764 | new_flp->fl_cmd = (u8) ELS_LS_ACC; | |
765 | ||
766 | /* | |
767 | * Send the response. If this fails, the originator should | |
768 | * repeat the sequence. | |
769 | */ | |
770 | f_ctl = FC_FC_EX_CTX | FC_FC_LAST_SEQ | FC_FC_END_SEQ; | |
771 | ep = fc_seq_exch(sp); | |
772 | fc_fill_fc_hdr(fp, FC_RCTL_ELS_REP, ep->did, ep->sid, | |
773 | FC_TYPE_ELS, f_ctl, 0); | |
774 | lport->tt.seq_send(lport, sp, fp); | |
775 | ||
776 | } else { | |
777 | fc_lport_error(lport, fp); | |
778 | } | |
779 | fc_lport_ptp_setup(lport, remote_fid, remote_wwpn, | |
780 | get_unaligned_be64(&flp->fl_wwnn)); | |
781 | ||
42e9a92f RL |
782 | out: |
783 | sp = fr_seq(rx_fp); | |
784 | fc_frame_free(rx_fp); | |
785 | } | |
786 | ||
787 | /** | |
34f42a07 | 788 | * fc_lport_recv_req() - The generic lport request handler |
42e9a92f RL |
789 | * @lport: The lport that received the request |
790 | * @sp: The sequence the request is on | |
791 | * @fp: The frame the request is in | |
792 | * | |
793 | * This function will see if the lport handles the request or | |
794 | * if an rport should handle the request. | |
795 | * | |
796 | * Locking Note: This function should not be called with the lport | |
797 | * lock held becuase it will grab the lock. | |
798 | */ | |
799 | static void fc_lport_recv_req(struct fc_lport *lport, struct fc_seq *sp, | |
800 | struct fc_frame *fp) | |
801 | { | |
802 | struct fc_frame_header *fh = fc_frame_header_get(fp); | |
803 | void (*recv) (struct fc_seq *, struct fc_frame *, struct fc_lport *); | |
42e9a92f RL |
804 | |
805 | mutex_lock(&lport->lp_mutex); | |
806 | ||
807 | /* | |
808 | * Handle special ELS cases like FLOGI, LOGO, and | |
809 | * RSCN here. These don't require a session. | |
810 | * Even if we had a session, it might not be ready. | |
811 | */ | |
e9ba8b42 JE |
812 | if (!lport->link_up) |
813 | fc_frame_free(fp); | |
814 | else if (fh->fh_type == FC_TYPE_ELS && | |
815 | fh->fh_r_ctl == FC_RCTL_ELS_REQ) { | |
42e9a92f RL |
816 | /* |
817 | * Check opcode. | |
818 | */ | |
131203a1 | 819 | recv = lport->tt.rport_recv_req; |
42e9a92f RL |
820 | switch (fc_frame_payload_op(fp)) { |
821 | case ELS_FLOGI: | |
822 | recv = fc_lport_recv_flogi_req; | |
823 | break; | |
824 | case ELS_LOGO: | |
825 | fh = fc_frame_header_get(fp); | |
826 | if (ntoh24(fh->fh_s_id) == FC_FID_FLOGI) | |
827 | recv = fc_lport_recv_logo_req; | |
828 | break; | |
829 | case ELS_RSCN: | |
830 | recv = lport->tt.disc_recv_req; | |
831 | break; | |
832 | case ELS_ECHO: | |
833 | recv = fc_lport_recv_echo_req; | |
834 | break; | |
835 | case ELS_RLIR: | |
836 | recv = fc_lport_recv_rlir_req; | |
837 | break; | |
838 | case ELS_RNID: | |
839 | recv = fc_lport_recv_rnid_req; | |
840 | break; | |
42e9a92f RL |
841 | } |
842 | ||
131203a1 | 843 | recv(sp, fp, lport); |
42e9a92f | 844 | } else { |
7414705e RL |
845 | FC_LPORT_DBG(lport, "dropping invalid frame (eof %x)\n", |
846 | fr_eof(fp)); | |
42e9a92f RL |
847 | fc_frame_free(fp); |
848 | } | |
849 | mutex_unlock(&lport->lp_mutex); | |
850 | ||
851 | /* | |
852 | * The common exch_done for all request may not be good | |
853 | * if any request requires longer hold on exhange. XXX | |
854 | */ | |
855 | lport->tt.exch_done(sp); | |
856 | } | |
857 | ||
858 | /** | |
34f42a07 | 859 | * fc_lport_reset() - Reset an lport |
42e9a92f RL |
860 | * @lport: The lport which should be reset |
861 | * | |
862 | * Locking Note: This functions should not be called with the | |
863 | * lport lock held. | |
864 | */ | |
865 | int fc_lport_reset(struct fc_lport *lport) | |
866 | { | |
f7db2c15 | 867 | cancel_delayed_work_sync(&lport->retry_work); |
42e9a92f RL |
868 | mutex_lock(&lport->lp_mutex); |
869 | fc_lport_enter_reset(lport); | |
870 | mutex_unlock(&lport->lp_mutex); | |
871 | return 0; | |
872 | } | |
873 | EXPORT_SYMBOL(fc_lport_reset); | |
874 | ||
875 | /** | |
1190d925 | 876 | * fc_lport_reset_locked() - Reset the local port |
42e9a92f RL |
877 | * @lport: Fibre Channel local port to be reset |
878 | * | |
879 | * Locking Note: The lport lock is expected to be held before calling | |
880 | * this routine. | |
881 | */ | |
1190d925 | 882 | static void fc_lport_reset_locked(struct fc_lport *lport) |
42e9a92f | 883 | { |
42e9a92f RL |
884 | if (lport->dns_rp) |
885 | lport->tt.rport_logoff(lport->dns_rp); | |
886 | ||
48f00902 | 887 | lport->ptp_rp = NULL; |
42e9a92f RL |
888 | |
889 | lport->tt.disc_stop(lport); | |
890 | ||
1f6ff364 | 891 | lport->tt.exch_mgr_reset(lport, 0, 0); |
42e9a92f RL |
892 | fc_host_fabric_name(lport->host) = 0; |
893 | fc_host_port_id(lport->host) = 0; | |
1190d925 | 894 | } |
42e9a92f | 895 | |
1190d925 JE |
896 | /** |
897 | * fc_lport_enter_reset() - Reset the local port | |
898 | * @lport: Fibre Channel local port to be reset | |
899 | * | |
900 | * Locking Note: The lport lock is expected to be held before calling | |
901 | * this routine. | |
902 | */ | |
903 | static void fc_lport_enter_reset(struct fc_lport *lport) | |
904 | { | |
905 | FC_LPORT_DBG(lport, "Entered RESET state from %s state\n", | |
906 | fc_lport_state(lport)); | |
907 | ||
8faecddb CL |
908 | if (lport->vport) { |
909 | if (lport->link_up) | |
910 | fc_vport_set_state(lport->vport, FC_VPORT_INITIALIZING); | |
911 | else | |
912 | fc_vport_set_state(lport->vport, FC_VPORT_LINKDOWN); | |
913 | } | |
1190d925 | 914 | fc_lport_state_enter(lport, LPORT_ST_RESET); |
8faecddb | 915 | fc_vports_linkchange(lport); |
1190d925 | 916 | fc_lport_reset_locked(lport); |
bc0e17f6 | 917 | if (lport->link_up) |
42e9a92f RL |
918 | fc_lport_enter_flogi(lport); |
919 | } | |
920 | ||
1190d925 JE |
921 | /** |
922 | * fc_lport_enter_disabled() - disable the local port | |
923 | * @lport: Fibre Channel local port to be reset | |
924 | * | |
925 | * Locking Note: The lport lock is expected to be held before calling | |
926 | * this routine. | |
927 | */ | |
928 | static void fc_lport_enter_disabled(struct fc_lport *lport) | |
929 | { | |
930 | FC_LPORT_DBG(lport, "Entered disabled state from %s state\n", | |
931 | fc_lport_state(lport)); | |
932 | ||
933 | fc_lport_state_enter(lport, LPORT_ST_DISABLED); | |
8faecddb | 934 | fc_vports_linkchange(lport); |
1190d925 JE |
935 | fc_lport_reset_locked(lport); |
936 | } | |
937 | ||
42e9a92f | 938 | /** |
34f42a07 | 939 | * fc_lport_error() - Handler for any errors |
42e9a92f RL |
940 | * @lport: The fc_lport object |
941 | * @fp: The frame pointer | |
942 | * | |
943 | * If the error was caused by a resource allocation failure | |
944 | * then wait for half a second and retry, otherwise retry | |
945 | * after the e_d_tov time. | |
946 | */ | |
947 | static void fc_lport_error(struct fc_lport *lport, struct fc_frame *fp) | |
948 | { | |
949 | unsigned long delay = 0; | |
7414705e RL |
950 | FC_LPORT_DBG(lport, "Error %ld in state %s, retries %d\n", |
951 | PTR_ERR(fp), fc_lport_state(lport), | |
952 | lport->retry_count); | |
42e9a92f RL |
953 | |
954 | if (!fp || PTR_ERR(fp) == -FC_EX_TIMEOUT) { | |
955 | /* | |
956 | * Memory allocation failure, or the exchange timed out. | |
957 | * Retry after delay | |
958 | */ | |
959 | if (lport->retry_count < lport->max_retry_count) { | |
960 | lport->retry_count++; | |
961 | if (!fp) | |
962 | delay = msecs_to_jiffies(500); | |
963 | else | |
964 | delay = msecs_to_jiffies(lport->e_d_tov); | |
965 | ||
966 | schedule_delayed_work(&lport->retry_work, delay); | |
967 | } else { | |
968 | switch (lport->state) { | |
b1d9fd55 | 969 | case LPORT_ST_DISABLED: |
42e9a92f RL |
970 | case LPORT_ST_READY: |
971 | case LPORT_ST_RESET: | |
c9c7bd7a | 972 | case LPORT_ST_RNN_ID: |
5baa17c3 | 973 | case LPORT_ST_RSNN_NN: |
c9866a54 | 974 | case LPORT_ST_RSPN_ID: |
42e9a92f RL |
975 | case LPORT_ST_RFT_ID: |
976 | case LPORT_ST_SCR: | |
977 | case LPORT_ST_DNS: | |
978 | case LPORT_ST_FLOGI: | |
979 | case LPORT_ST_LOGO: | |
980 | fc_lport_enter_reset(lport); | |
981 | break; | |
982 | } | |
983 | } | |
984 | } | |
985 | } | |
986 | ||
987 | /** | |
34f42a07 | 988 | * fc_lport_rft_id_resp() - Handle response to Register Fibre |
28cc0e31 CL |
989 | * Channel Types by ID (RFT_ID) request |
990 | * @sp: current sequence in RFT_ID exchange | |
42e9a92f RL |
991 | * @fp: response frame |
992 | * @lp_arg: Fibre Channel host port instance | |
993 | * | |
994 | * Locking Note: This function will be called without the lport lock | |
995 | * held, but it will lock, call an _enter_* function or fc_lport_error | |
996 | * and then unlock the lport. | |
997 | */ | |
998 | static void fc_lport_rft_id_resp(struct fc_seq *sp, struct fc_frame *fp, | |
999 | void *lp_arg) | |
1000 | { | |
1001 | struct fc_lport *lport = lp_arg; | |
1002 | struct fc_frame_header *fh; | |
1003 | struct fc_ct_hdr *ct; | |
1004 | ||
f657d299 JE |
1005 | FC_LPORT_DBG(lport, "Received a RFT_ID %s\n", fc_els_resp_type(fp)); |
1006 | ||
42e9a92f RL |
1007 | if (fp == ERR_PTR(-FC_EX_CLOSED)) |
1008 | return; | |
1009 | ||
1010 | mutex_lock(&lport->lp_mutex); | |
1011 | ||
42e9a92f | 1012 | if (lport->state != LPORT_ST_RFT_ID) { |
7414705e RL |
1013 | FC_LPORT_DBG(lport, "Received a RFT_ID response, but in state " |
1014 | "%s\n", fc_lport_state(lport)); | |
76f6804e AJ |
1015 | if (IS_ERR(fp)) |
1016 | goto err; | |
42e9a92f RL |
1017 | goto out; |
1018 | } | |
1019 | ||
76f6804e AJ |
1020 | if (IS_ERR(fp)) { |
1021 | fc_lport_error(lport, fp); | |
1022 | goto err; | |
1023 | } | |
1024 | ||
42e9a92f RL |
1025 | fh = fc_frame_header_get(fp); |
1026 | ct = fc_frame_payload_get(fp, sizeof(*ct)); | |
1027 | ||
1028 | if (fh && ct && fh->fh_type == FC_TYPE_CT && | |
1029 | ct->ct_fs_type == FC_FST_DIR && | |
1030 | ct->ct_fs_subtype == FC_NS_SUBTYPE && | |
1031 | ntohs(ct->ct_cmd) == FC_FS_ACC) | |
1032 | fc_lport_enter_scr(lport); | |
1033 | else | |
1034 | fc_lport_error(lport, fp); | |
1035 | out: | |
1036 | fc_frame_free(fp); | |
1037 | err: | |
1038 | mutex_unlock(&lport->lp_mutex); | |
1039 | } | |
1040 | ||
c9866a54 CL |
1041 | /** |
1042 | * fc_lport_rspn_id_resp() - Handle response to Register Symbolic Port Name | |
1043 | * by ID (RSPN_ID) request | |
1044 | * @sp: current sequence in RSPN_ID exchange | |
1045 | * @fp: response frame | |
1046 | * @lp_arg: Fibre Channel host port instance | |
1047 | * | |
1048 | * Locking Note: This function will be called without the lport lock | |
1049 | * held, but it will lock, call an _enter_* function or fc_lport_error | |
1050 | * and then unlock the lport. | |
1051 | */ | |
1052 | static void fc_lport_rspn_id_resp(struct fc_seq *sp, struct fc_frame *fp, | |
1053 | void *lp_arg) | |
1054 | { | |
1055 | struct fc_lport *lport = lp_arg; | |
1056 | struct fc_frame_header *fh; | |
1057 | struct fc_ct_hdr *ct; | |
1058 | ||
1059 | FC_LPORT_DBG(lport, "Received a RSPN_ID %s\n", fc_els_resp_type(fp)); | |
1060 | ||
1061 | if (fp == ERR_PTR(-FC_EX_CLOSED)) | |
1062 | return; | |
1063 | ||
1064 | mutex_lock(&lport->lp_mutex); | |
1065 | ||
1066 | if (lport->state != LPORT_ST_RSPN_ID) { | |
1067 | FC_LPORT_DBG(lport, "Received a RSPN_ID response, but in state " | |
1068 | "%s\n", fc_lport_state(lport)); | |
1069 | if (IS_ERR(fp)) | |
1070 | goto err; | |
1071 | goto out; | |
1072 | } | |
1073 | ||
1074 | if (IS_ERR(fp)) { | |
1075 | fc_lport_error(lport, fp); | |
1076 | goto err; | |
1077 | } | |
1078 | ||
1079 | fh = fc_frame_header_get(fp); | |
1080 | ct = fc_frame_payload_get(fp, sizeof(*ct)); | |
1081 | if (fh && ct && fh->fh_type == FC_TYPE_CT && | |
1082 | ct->ct_fs_type == FC_FST_DIR && | |
1083 | ct->ct_fs_subtype == FC_NS_SUBTYPE && | |
1084 | ntohs(ct->ct_cmd) == FC_FS_ACC) | |
1085 | fc_lport_enter_rspn_id(lport); | |
1086 | else | |
1087 | fc_lport_error(lport, fp); | |
1088 | ||
1089 | out: | |
1090 | fc_frame_free(fp); | |
1091 | err: | |
1092 | mutex_unlock(&lport->lp_mutex); | |
1093 | } | |
5baa17c3 CL |
1094 | /** |
1095 | * fc_lport_rsnn_nn_resp() - Handle response to Register Symbolic Node Name | |
1096 | * by Node Name (RSNN_NN) request | |
1097 | * @sp: current sequence in RSNN_NN exchange | |
1098 | * @fp: response frame | |
1099 | * @lp_arg: Fibre Channel host port instance | |
1100 | * | |
1101 | * Locking Note: This function will be called without the lport lock | |
1102 | * held, but it will lock, call an _enter_* function or fc_lport_error | |
1103 | * and then unlock the lport. | |
1104 | */ | |
1105 | static void fc_lport_rsnn_nn_resp(struct fc_seq *sp, struct fc_frame *fp, | |
1106 | void *lp_arg) | |
1107 | { | |
1108 | struct fc_lport *lport = lp_arg; | |
1109 | struct fc_frame_header *fh; | |
1110 | struct fc_ct_hdr *ct; | |
1111 | ||
1112 | FC_LPORT_DBG(lport, "Received a RSNN_NN %s\n", fc_els_resp_type(fp)); | |
1113 | ||
1114 | if (fp == ERR_PTR(-FC_EX_CLOSED)) | |
1115 | return; | |
1116 | ||
1117 | mutex_lock(&lport->lp_mutex); | |
1118 | ||
1119 | if (lport->state != LPORT_ST_RSNN_NN) { | |
1120 | FC_LPORT_DBG(lport, "Received a RSNN_NN response, but in state " | |
1121 | "%s\n", fc_lport_state(lport)); | |
1122 | if (IS_ERR(fp)) | |
1123 | goto err; | |
1124 | goto out; | |
1125 | } | |
1126 | ||
1127 | if (IS_ERR(fp)) { | |
1128 | fc_lport_error(lport, fp); | |
1129 | goto err; | |
1130 | } | |
1131 | ||
1132 | fh = fc_frame_header_get(fp); | |
1133 | ct = fc_frame_payload_get(fp, sizeof(*ct)); | |
1134 | if (fh && ct && fh->fh_type == FC_TYPE_CT && | |
1135 | ct->ct_fs_type == FC_FST_DIR && | |
1136 | ct->ct_fs_subtype == FC_NS_SUBTYPE && | |
1137 | ntohs(ct->ct_cmd) == FC_FS_ACC) | |
1138 | fc_lport_enter_rsnn_nn(lport); | |
1139 | else | |
1140 | fc_lport_error(lport, fp); | |
1141 | ||
1142 | out: | |
1143 | fc_frame_free(fp); | |
1144 | err: | |
1145 | mutex_unlock(&lport->lp_mutex); | |
1146 | } | |
1147 | ||
c9c7bd7a CL |
1148 | /** |
1149 | * fc_lport_rnn_id_resp() - Handle response to Register Node | |
1150 | * Name by ID (RNN_ID) request | |
1151 | * @sp: current sequence in RNN_ID exchange | |
1152 | * @fp: response frame | |
1153 | * @lp_arg: Fibre Channel host port instance | |
1154 | * | |
1155 | * Locking Note: This function will be called without the lport lock | |
1156 | * held, but it will lock, call an _enter_* function or fc_lport_error | |
1157 | * and then unlock the lport. | |
1158 | */ | |
1159 | static void fc_lport_rnn_id_resp(struct fc_seq *sp, struct fc_frame *fp, | |
1160 | void *lp_arg) | |
1161 | { | |
1162 | struct fc_lport *lport = lp_arg; | |
1163 | struct fc_frame_header *fh; | |
1164 | struct fc_ct_hdr *ct; | |
1165 | ||
1166 | FC_LPORT_DBG(lport, "Received a RNN_ID %s\n", fc_els_resp_type(fp)); | |
1167 | ||
1168 | if (fp == ERR_PTR(-FC_EX_CLOSED)) | |
1169 | return; | |
1170 | ||
1171 | mutex_lock(&lport->lp_mutex); | |
1172 | ||
1173 | if (lport->state != LPORT_ST_RNN_ID) { | |
1174 | FC_LPORT_DBG(lport, "Received a RNN_ID response, but in state " | |
1175 | "%s\n", fc_lport_state(lport)); | |
1176 | if (IS_ERR(fp)) | |
1177 | goto err; | |
1178 | goto out; | |
1179 | } | |
1180 | ||
1181 | if (IS_ERR(fp)) { | |
1182 | fc_lport_error(lport, fp); | |
1183 | goto err; | |
1184 | } | |
1185 | ||
1186 | fh = fc_frame_header_get(fp); | |
1187 | ct = fc_frame_payload_get(fp, sizeof(*ct)); | |
1188 | if (fh && ct && fh->fh_type == FC_TYPE_CT && | |
1189 | ct->ct_fs_type == FC_FST_DIR && | |
1190 | ct->ct_fs_subtype == FC_NS_SUBTYPE && | |
1191 | ntohs(ct->ct_cmd) == FC_FS_ACC) | |
1192 | fc_lport_enter_rft_id(lport); | |
1193 | else | |
1194 | fc_lport_error(lport, fp); | |
1195 | ||
1196 | out: | |
1197 | fc_frame_free(fp); | |
1198 | err: | |
1199 | mutex_unlock(&lport->lp_mutex); | |
1200 | } | |
1201 | ||
42e9a92f | 1202 | /** |
34f42a07 | 1203 | * fc_lport_scr_resp() - Handle response to State Change Register (SCR) request |
42e9a92f RL |
1204 | * @sp: current sequence in SCR exchange |
1205 | * @fp: response frame | |
1206 | * @lp_arg: Fibre Channel lport port instance that sent the registration request | |
1207 | * | |
1208 | * Locking Note: This function will be called without the lport lock | |
1209 | * held, but it will lock, call an _enter_* function or fc_lport_error | |
1210 | * and then unlock the lport. | |
1211 | */ | |
1212 | static void fc_lport_scr_resp(struct fc_seq *sp, struct fc_frame *fp, | |
1213 | void *lp_arg) | |
1214 | { | |
1215 | struct fc_lport *lport = lp_arg; | |
1216 | u8 op; | |
1217 | ||
f657d299 JE |
1218 | FC_LPORT_DBG(lport, "Received a SCR %s\n", fc_els_resp_type(fp)); |
1219 | ||
42e9a92f RL |
1220 | if (fp == ERR_PTR(-FC_EX_CLOSED)) |
1221 | return; | |
1222 | ||
1223 | mutex_lock(&lport->lp_mutex); | |
1224 | ||
42e9a92f | 1225 | if (lport->state != LPORT_ST_SCR) { |
7414705e RL |
1226 | FC_LPORT_DBG(lport, "Received a SCR response, but in state " |
1227 | "%s\n", fc_lport_state(lport)); | |
76f6804e AJ |
1228 | if (IS_ERR(fp)) |
1229 | goto err; | |
42e9a92f RL |
1230 | goto out; |
1231 | } | |
1232 | ||
76f6804e AJ |
1233 | if (IS_ERR(fp)) { |
1234 | fc_lport_error(lport, fp); | |
1235 | goto err; | |
1236 | } | |
1237 | ||
42e9a92f RL |
1238 | op = fc_frame_payload_op(fp); |
1239 | if (op == ELS_LS_ACC) | |
1240 | fc_lport_enter_ready(lport); | |
1241 | else | |
1242 | fc_lport_error(lport, fp); | |
1243 | ||
1244 | out: | |
1245 | fc_frame_free(fp); | |
1246 | err: | |
1247 | mutex_unlock(&lport->lp_mutex); | |
1248 | } | |
1249 | ||
1250 | /** | |
34f42a07 | 1251 | * fc_lport_enter_scr() - Send a State Change Register (SCR) request |
42e9a92f RL |
1252 | * @lport: Fibre Channel local port to register for state changes |
1253 | * | |
1254 | * Locking Note: The lport lock is expected to be held before calling | |
1255 | * this routine. | |
1256 | */ | |
1257 | static void fc_lport_enter_scr(struct fc_lport *lport) | |
1258 | { | |
1259 | struct fc_frame *fp; | |
1260 | ||
7414705e RL |
1261 | FC_LPORT_DBG(lport, "Entered SCR state from %s state\n", |
1262 | fc_lport_state(lport)); | |
42e9a92f RL |
1263 | |
1264 | fc_lport_state_enter(lport, LPORT_ST_SCR); | |
1265 | ||
1266 | fp = fc_frame_alloc(lport, sizeof(struct fc_els_scr)); | |
1267 | if (!fp) { | |
1268 | fc_lport_error(lport, fp); | |
1269 | return; | |
1270 | } | |
1271 | ||
a46f327a | 1272 | if (!lport->tt.elsct_send(lport, FC_FID_FCTRL, fp, ELS_SCR, |
42e9a92f | 1273 | fc_lport_scr_resp, lport, lport->e_d_tov)) |
8f550f93 | 1274 | fc_lport_error(lport, NULL); |
42e9a92f RL |
1275 | } |
1276 | ||
1277 | /** | |
34f42a07 | 1278 | * fc_lport_enter_rft_id() - Register FC4-types with the name server |
42e9a92f RL |
1279 | * @lport: Fibre Channel local port to register |
1280 | * | |
1281 | * Locking Note: The lport lock is expected to be held before calling | |
1282 | * this routine. | |
1283 | */ | |
1284 | static void fc_lport_enter_rft_id(struct fc_lport *lport) | |
1285 | { | |
1286 | struct fc_frame *fp; | |
1287 | struct fc_ns_fts *lps; | |
1288 | int i; | |
1289 | ||
7414705e RL |
1290 | FC_LPORT_DBG(lport, "Entered RFT_ID state from %s state\n", |
1291 | fc_lport_state(lport)); | |
42e9a92f RL |
1292 | |
1293 | fc_lport_state_enter(lport, LPORT_ST_RFT_ID); | |
1294 | ||
1295 | lps = &lport->fcts; | |
1296 | i = sizeof(lps->ff_type_map) / sizeof(lps->ff_type_map[0]); | |
1297 | while (--i >= 0) | |
1298 | if (ntohl(lps->ff_type_map[i]) != 0) | |
1299 | break; | |
1300 | if (i < 0) { | |
1301 | /* nothing to register, move on to SCR */ | |
1302 | fc_lport_enter_scr(lport); | |
1303 | return; | |
1304 | } | |
1305 | ||
1306 | fp = fc_frame_alloc(lport, sizeof(struct fc_ct_hdr) + | |
1307 | sizeof(struct fc_ns_rft)); | |
1308 | if (!fp) { | |
1309 | fc_lport_error(lport, fp); | |
1310 | return; | |
1311 | } | |
1312 | ||
a46f327a | 1313 | if (!lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RFT_ID, |
42e9a92f RL |
1314 | fc_lport_rft_id_resp, |
1315 | lport, lport->e_d_tov)) | |
1316 | fc_lport_error(lport, fp); | |
1317 | } | |
1318 | ||
c9866a54 CL |
1319 | /** |
1320 | * fc_rport_enter_rspn_id() - Register symbolic port name with the name server | |
1321 | * @lport: Fibre Channel local port to register | |
1322 | * | |
1323 | * Locking Note: The lport lock is expected to be held before calling | |
1324 | * this routine. | |
1325 | */ | |
1326 | static void fc_lport_enter_rspn_id(struct fc_lport *lport) | |
1327 | { | |
1328 | struct fc_frame *fp; | |
1329 | size_t len; | |
1330 | ||
1331 | FC_LPORT_DBG(lport, "Entered RSPN_ID state from %s state\n", | |
1332 | fc_lport_state(lport)); | |
1333 | ||
1334 | fc_lport_state_enter(lport, LPORT_ST_RSPN_ID); | |
1335 | ||
1336 | len = strnlen(fc_host_symbolic_name(lport->host), 255); | |
1337 | fp = fc_frame_alloc(lport, sizeof(struct fc_ct_hdr) + | |
1338 | sizeof(struct fc_ns_rspn) + len); | |
1339 | if (!fp) { | |
1340 | fc_lport_error(lport, fp); | |
1341 | return; | |
1342 | } | |
1343 | ||
1344 | if (!lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RSPN_ID, | |
1345 | fc_lport_rspn_id_resp, | |
1346 | lport, lport->e_d_tov)) | |
1347 | fc_lport_error(lport, fp); | |
1348 | } | |
1349 | ||
5baa17c3 CL |
1350 | /** |
1351 | * fc_rport_enter_rsnn_nn() - Register symbolic node name with the name server | |
1352 | * @lport: Fibre Channel local port to register | |
1353 | * | |
1354 | * Locking Note: The lport lock is expected to be held before calling | |
1355 | * this routine. | |
1356 | */ | |
1357 | static void fc_lport_enter_rsnn_nn(struct fc_lport *lport) | |
1358 | { | |
1359 | struct fc_frame *fp; | |
1360 | size_t len; | |
1361 | ||
1362 | FC_LPORT_DBG(lport, "Entered RSNN_NN state from %s state\n", | |
1363 | fc_lport_state(lport)); | |
1364 | ||
1365 | fc_lport_state_enter(lport, LPORT_ST_RSNN_NN); | |
1366 | ||
1367 | len = strnlen(fc_host_symbolic_name(lport->host), 255); | |
1368 | fp = fc_frame_alloc(lport, sizeof(struct fc_ct_hdr) + | |
1369 | sizeof(struct fc_ns_rsnn) + len); | |
1370 | if (!fp) { | |
1371 | fc_lport_error(lport, fp); | |
1372 | return; | |
1373 | } | |
1374 | ||
1375 | if (!lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RSNN_NN, | |
1376 | fc_lport_rsnn_nn_resp, | |
1377 | lport, lport->e_d_tov)) | |
1378 | fc_lport_error(lport, fp); | |
1379 | } | |
1380 | ||
c9c7bd7a CL |
1381 | /** |
1382 | * fc_rport_enter_rnn_id() - Register node name with the name server | |
1383 | * @lport: Fibre Channel local port to register | |
1384 | * | |
1385 | * Locking Note: The lport lock is expected to be held before calling | |
1386 | * this routine. | |
1387 | */ | |
1388 | static void fc_lport_enter_rnn_id(struct fc_lport *lport) | |
1389 | { | |
1390 | struct fc_frame *fp; | |
1391 | ||
1392 | FC_LPORT_DBG(lport, "Entered RNN_ID state from %s state\n", | |
1393 | fc_lport_state(lport)); | |
1394 | ||
1395 | fc_lport_state_enter(lport, LPORT_ST_RNN_ID); | |
1396 | ||
1397 | fp = fc_frame_alloc(lport, sizeof(struct fc_ct_hdr) + | |
1398 | sizeof(struct fc_ns_rn_id)); | |
1399 | if (!fp) { | |
1400 | fc_lport_error(lport, fp); | |
1401 | return; | |
1402 | } | |
1403 | ||
1404 | if (!lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RNN_ID, | |
1405 | fc_lport_rnn_id_resp, | |
1406 | lport, lport->e_d_tov)) | |
1407 | fc_lport_error(lport, fp); | |
1408 | } | |
1409 | ||
42e9a92f RL |
1410 | static struct fc_rport_operations fc_lport_rport_ops = { |
1411 | .event_callback = fc_lport_rport_callback, | |
1412 | }; | |
1413 | ||
1414 | /** | |
34f42a07 | 1415 | * fc_rport_enter_dns() - Create a rport to the name server |
42e9a92f RL |
1416 | * @lport: Fibre Channel local port requesting a rport for the name server |
1417 | * | |
1418 | * Locking Note: The lport lock is expected to be held before calling | |
1419 | * this routine. | |
1420 | */ | |
1421 | static void fc_lport_enter_dns(struct fc_lport *lport) | |
1422 | { | |
ab28f1fd | 1423 | struct fc_rport_priv *rdata; |
42e9a92f | 1424 | |
7414705e RL |
1425 | FC_LPORT_DBG(lport, "Entered DNS state from %s state\n", |
1426 | fc_lport_state(lport)); | |
42e9a92f RL |
1427 | |
1428 | fc_lport_state_enter(lport, LPORT_ST_DNS); | |
1429 | ||
48f00902 | 1430 | mutex_lock(&lport->disc.disc_mutex); |
9737e6a7 | 1431 | rdata = lport->tt.rport_create(lport, FC_FID_DIR_SERV); |
48f00902 | 1432 | mutex_unlock(&lport->disc.disc_mutex); |
9fb9d328 | 1433 | if (!rdata) |
42e9a92f RL |
1434 | goto err; |
1435 | ||
42e9a92f | 1436 | rdata->ops = &fc_lport_rport_ops; |
9fb9d328 | 1437 | lport->tt.rport_login(rdata); |
42e9a92f RL |
1438 | return; |
1439 | ||
1440 | err: | |
1441 | fc_lport_error(lport, NULL); | |
1442 | } | |
1443 | ||
1444 | /** | |
34f42a07 | 1445 | * fc_lport_timeout() - Handler for the retry_work timer. |
42e9a92f RL |
1446 | * @work: The work struct of the fc_lport |
1447 | */ | |
1448 | static void fc_lport_timeout(struct work_struct *work) | |
1449 | { | |
1450 | struct fc_lport *lport = | |
1451 | container_of(work, struct fc_lport, | |
1452 | retry_work.work); | |
1453 | ||
1454 | mutex_lock(&lport->lp_mutex); | |
1455 | ||
1456 | switch (lport->state) { | |
b1d9fd55 | 1457 | case LPORT_ST_DISABLED: |
22655ac2 JE |
1458 | WARN_ON(1); |
1459 | break; | |
42e9a92f | 1460 | case LPORT_ST_READY: |
42e9a92f RL |
1461 | WARN_ON(1); |
1462 | break; | |
22655ac2 JE |
1463 | case LPORT_ST_RESET: |
1464 | break; | |
42e9a92f RL |
1465 | case LPORT_ST_FLOGI: |
1466 | fc_lport_enter_flogi(lport); | |
1467 | break; | |
1468 | case LPORT_ST_DNS: | |
1469 | fc_lport_enter_dns(lport); | |
1470 | break; | |
c9c7bd7a CL |
1471 | case LPORT_ST_RNN_ID: |
1472 | fc_lport_enter_rnn_id(lport); | |
1473 | break; | |
5baa17c3 CL |
1474 | case LPORT_ST_RSNN_NN: |
1475 | fc_lport_enter_rsnn_nn(lport); | |
1476 | break; | |
c9866a54 CL |
1477 | case LPORT_ST_RSPN_ID: |
1478 | fc_lport_enter_rspn_id(lport); | |
1479 | break; | |
42e9a92f RL |
1480 | case LPORT_ST_RFT_ID: |
1481 | fc_lport_enter_rft_id(lport); | |
1482 | break; | |
1483 | case LPORT_ST_SCR: | |
1484 | fc_lport_enter_scr(lport); | |
1485 | break; | |
1486 | case LPORT_ST_LOGO: | |
1487 | fc_lport_enter_logo(lport); | |
1488 | break; | |
1489 | } | |
1490 | ||
1491 | mutex_unlock(&lport->lp_mutex); | |
1492 | } | |
1493 | ||
1494 | /** | |
34f42a07 | 1495 | * fc_lport_logo_resp() - Handle response to LOGO request |
42e9a92f RL |
1496 | * @sp: current sequence in LOGO exchange |
1497 | * @fp: response frame | |
1498 | * @lp_arg: Fibre Channel lport port instance that sent the LOGO request | |
1499 | * | |
1500 | * Locking Note: This function will be called without the lport lock | |
1501 | * held, but it will lock, call an _enter_* function or fc_lport_error | |
1502 | * and then unlock the lport. | |
1503 | */ | |
11b56188 | 1504 | void fc_lport_logo_resp(struct fc_seq *sp, struct fc_frame *fp, |
42e9a92f RL |
1505 | void *lp_arg) |
1506 | { | |
1507 | struct fc_lport *lport = lp_arg; | |
1508 | u8 op; | |
1509 | ||
f657d299 JE |
1510 | FC_LPORT_DBG(lport, "Received a LOGO %s\n", fc_els_resp_type(fp)); |
1511 | ||
42e9a92f RL |
1512 | if (fp == ERR_PTR(-FC_EX_CLOSED)) |
1513 | return; | |
1514 | ||
1515 | mutex_lock(&lport->lp_mutex); | |
1516 | ||
42e9a92f | 1517 | if (lport->state != LPORT_ST_LOGO) { |
7414705e RL |
1518 | FC_LPORT_DBG(lport, "Received a LOGO response, but in state " |
1519 | "%s\n", fc_lport_state(lport)); | |
76f6804e AJ |
1520 | if (IS_ERR(fp)) |
1521 | goto err; | |
42e9a92f RL |
1522 | goto out; |
1523 | } | |
1524 | ||
76f6804e AJ |
1525 | if (IS_ERR(fp)) { |
1526 | fc_lport_error(lport, fp); | |
1527 | goto err; | |
1528 | } | |
1529 | ||
42e9a92f RL |
1530 | op = fc_frame_payload_op(fp); |
1531 | if (op == ELS_LS_ACC) | |
1190d925 | 1532 | fc_lport_enter_disabled(lport); |
42e9a92f RL |
1533 | else |
1534 | fc_lport_error(lport, fp); | |
1535 | ||
1536 | out: | |
1537 | fc_frame_free(fp); | |
1538 | err: | |
1539 | mutex_unlock(&lport->lp_mutex); | |
1540 | } | |
11b56188 | 1541 | EXPORT_SYMBOL(fc_lport_logo_resp); |
42e9a92f RL |
1542 | |
1543 | /** | |
34f42a07 | 1544 | * fc_rport_enter_logo() - Logout of the fabric |
42e9a92f RL |
1545 | * @lport: Fibre Channel local port to be logged out |
1546 | * | |
1547 | * Locking Note: The lport lock is expected to be held before calling | |
1548 | * this routine. | |
1549 | */ | |
1550 | static void fc_lport_enter_logo(struct fc_lport *lport) | |
1551 | { | |
1552 | struct fc_frame *fp; | |
1553 | struct fc_els_logo *logo; | |
1554 | ||
7414705e RL |
1555 | FC_LPORT_DBG(lport, "Entered LOGO state from %s state\n", |
1556 | fc_lport_state(lport)); | |
42e9a92f RL |
1557 | |
1558 | fc_lport_state_enter(lport, LPORT_ST_LOGO); | |
8faecddb | 1559 | fc_vports_linkchange(lport); |
42e9a92f | 1560 | |
42e9a92f RL |
1561 | fp = fc_frame_alloc(lport, sizeof(*logo)); |
1562 | if (!fp) { | |
1563 | fc_lport_error(lport, fp); | |
1564 | return; | |
1565 | } | |
1566 | ||
a46f327a JE |
1567 | if (!lport->tt.elsct_send(lport, FC_FID_FLOGI, fp, ELS_LOGO, |
1568 | fc_lport_logo_resp, lport, lport->e_d_tov)) | |
8f550f93 | 1569 | fc_lport_error(lport, NULL); |
42e9a92f RL |
1570 | } |
1571 | ||
1572 | /** | |
34f42a07 | 1573 | * fc_lport_flogi_resp() - Handle response to FLOGI request |
42e9a92f RL |
1574 | * @sp: current sequence in FLOGI exchange |
1575 | * @fp: response frame | |
1576 | * @lp_arg: Fibre Channel lport port instance that sent the FLOGI request | |
1577 | * | |
1578 | * Locking Note: This function will be called without the lport lock | |
1579 | * held, but it will lock, call an _enter_* function or fc_lport_error | |
1580 | * and then unlock the lport. | |
1581 | */ | |
11b56188 | 1582 | void fc_lport_flogi_resp(struct fc_seq *sp, struct fc_frame *fp, |
42e9a92f RL |
1583 | void *lp_arg) |
1584 | { | |
1585 | struct fc_lport *lport = lp_arg; | |
1586 | struct fc_frame_header *fh; | |
1587 | struct fc_els_flogi *flp; | |
1588 | u32 did; | |
1589 | u16 csp_flags; | |
1590 | unsigned int r_a_tov; | |
1591 | unsigned int e_d_tov; | |
1592 | u16 mfs; | |
1593 | ||
f657d299 JE |
1594 | FC_LPORT_DBG(lport, "Received a FLOGI %s\n", fc_els_resp_type(fp)); |
1595 | ||
42e9a92f RL |
1596 | if (fp == ERR_PTR(-FC_EX_CLOSED)) |
1597 | return; | |
1598 | ||
1599 | mutex_lock(&lport->lp_mutex); | |
1600 | ||
42e9a92f | 1601 | if (lport->state != LPORT_ST_FLOGI) { |
7414705e RL |
1602 | FC_LPORT_DBG(lport, "Received a FLOGI response, but in state " |
1603 | "%s\n", fc_lport_state(lport)); | |
76f6804e AJ |
1604 | if (IS_ERR(fp)) |
1605 | goto err; | |
42e9a92f RL |
1606 | goto out; |
1607 | } | |
1608 | ||
76f6804e AJ |
1609 | if (IS_ERR(fp)) { |
1610 | fc_lport_error(lport, fp); | |
1611 | goto err; | |
1612 | } | |
1613 | ||
42e9a92f RL |
1614 | fh = fc_frame_header_get(fp); |
1615 | did = ntoh24(fh->fh_d_id); | |
1616 | if (fc_frame_payload_op(fp) == ELS_LS_ACC && did != 0) { | |
1617 | ||
7414705e RL |
1618 | printk(KERN_INFO "libfc: Assigned FID (%6x) in FLOGI response\n", |
1619 | did); | |
42e9a92f RL |
1620 | fc_host_port_id(lport->host) = did; |
1621 | ||
1622 | flp = fc_frame_payload_get(fp, sizeof(*flp)); | |
1623 | if (flp) { | |
1624 | mfs = ntohs(flp->fl_csp.sp_bb_data) & | |
1625 | FC_SP_BB_DATA_MASK; | |
1626 | if (mfs >= FC_SP_MIN_MAX_PAYLOAD && | |
1627 | mfs < lport->mfs) | |
1628 | lport->mfs = mfs; | |
1629 | csp_flags = ntohs(flp->fl_csp.sp_features); | |
1630 | r_a_tov = ntohl(flp->fl_csp.sp_r_a_tov); | |
1631 | e_d_tov = ntohl(flp->fl_csp.sp_e_d_tov); | |
1632 | if (csp_flags & FC_SP_FT_EDTR) | |
1633 | e_d_tov /= 1000000; | |
db36c06c CL |
1634 | |
1635 | lport->npiv_enabled = !!(csp_flags & FC_SP_FT_NPIV_ACC); | |
1636 | ||
42e9a92f RL |
1637 | if ((csp_flags & FC_SP_FT_FPORT) == 0) { |
1638 | if (e_d_tov > lport->e_d_tov) | |
1639 | lport->e_d_tov = e_d_tov; | |
1640 | lport->r_a_tov = 2 * e_d_tov; | |
7414705e RL |
1641 | printk(KERN_INFO "libfc: Port (%6x) entered " |
1642 | "point to point mode\n", did); | |
42e9a92f RL |
1643 | fc_lport_ptp_setup(lport, ntoh24(fh->fh_s_id), |
1644 | get_unaligned_be64( | |
1645 | &flp->fl_wwpn), | |
1646 | get_unaligned_be64( | |
1647 | &flp->fl_wwnn)); | |
1648 | } else { | |
1649 | lport->e_d_tov = e_d_tov; | |
1650 | lport->r_a_tov = r_a_tov; | |
1651 | fc_host_fabric_name(lport->host) = | |
1652 | get_unaligned_be64(&flp->fl_wwnn); | |
1653 | fc_lport_enter_dns(lport); | |
1654 | } | |
1655 | } | |
42e9a92f | 1656 | } else { |
7414705e | 1657 | FC_LPORT_DBG(lport, "Bad FLOGI response\n"); |
42e9a92f RL |
1658 | } |
1659 | ||
1660 | out: | |
1661 | fc_frame_free(fp); | |
1662 | err: | |
1663 | mutex_unlock(&lport->lp_mutex); | |
1664 | } | |
11b56188 | 1665 | EXPORT_SYMBOL(fc_lport_flogi_resp); |
42e9a92f RL |
1666 | |
1667 | /** | |
34f42a07 | 1668 | * fc_rport_enter_flogi() - Send a FLOGI request to the fabric manager |
42e9a92f RL |
1669 | * @lport: Fibre Channel local port to be logged in to the fabric |
1670 | * | |
1671 | * Locking Note: The lport lock is expected to be held before calling | |
1672 | * this routine. | |
1673 | */ | |
1674 | void fc_lport_enter_flogi(struct fc_lport *lport) | |
1675 | { | |
1676 | struct fc_frame *fp; | |
1677 | ||
7414705e RL |
1678 | FC_LPORT_DBG(lport, "Entered FLOGI state from %s state\n", |
1679 | fc_lport_state(lport)); | |
42e9a92f RL |
1680 | |
1681 | fc_lport_state_enter(lport, LPORT_ST_FLOGI); | |
1682 | ||
1683 | fp = fc_frame_alloc(lport, sizeof(struct fc_els_flogi)); | |
1684 | if (!fp) | |
1685 | return fc_lport_error(lport, fp); | |
1686 | ||
db36c06c CL |
1687 | if (!lport->tt.elsct_send(lport, FC_FID_FLOGI, fp, |
1688 | lport->vport ? ELS_FDISC : ELS_FLOGI, | |
42e9a92f | 1689 | fc_lport_flogi_resp, lport, lport->e_d_tov)) |
8f550f93 | 1690 | fc_lport_error(lport, NULL); |
42e9a92f RL |
1691 | } |
1692 | ||
1693 | /* Configure a fc_lport */ | |
1694 | int fc_lport_config(struct fc_lport *lport) | |
1695 | { | |
1696 | INIT_DELAYED_WORK(&lport->retry_work, fc_lport_timeout); | |
1697 | mutex_init(&lport->lp_mutex); | |
1698 | ||
b1d9fd55 | 1699 | fc_lport_state_enter(lport, LPORT_ST_DISABLED); |
42e9a92f RL |
1700 | |
1701 | fc_lport_add_fc4_type(lport, FC_TYPE_FCP); | |
1702 | fc_lport_add_fc4_type(lport, FC_TYPE_CT); | |
1703 | ||
1704 | return 0; | |
1705 | } | |
1706 | EXPORT_SYMBOL(fc_lport_config); | |
1707 | ||
1708 | int fc_lport_init(struct fc_lport *lport) | |
1709 | { | |
1710 | if (!lport->tt.lport_recv) | |
1711 | lport->tt.lport_recv = fc_lport_recv_req; | |
1712 | ||
1713 | if (!lport->tt.lport_reset) | |
1714 | lport->tt.lport_reset = fc_lport_reset; | |
1715 | ||
1716 | fc_host_port_type(lport->host) = FC_PORTTYPE_NPORT; | |
1717 | fc_host_node_name(lport->host) = lport->wwnn; | |
1718 | fc_host_port_name(lport->host) = lport->wwpn; | |
1719 | fc_host_supported_classes(lport->host) = FC_COS_CLASS3; | |
1720 | memset(fc_host_supported_fc4s(lport->host), 0, | |
1721 | sizeof(fc_host_supported_fc4s(lport->host))); | |
1722 | fc_host_supported_fc4s(lport->host)[2] = 1; | |
1723 | fc_host_supported_fc4s(lport->host)[7] = 1; | |
1724 | ||
1725 | /* This value is also unchanging */ | |
1726 | memset(fc_host_active_fc4s(lport->host), 0, | |
1727 | sizeof(fc_host_active_fc4s(lport->host))); | |
1728 | fc_host_active_fc4s(lport->host)[2] = 1; | |
1729 | fc_host_active_fc4s(lport->host)[7] = 1; | |
1730 | fc_host_maxframe_size(lport->host) = lport->mfs; | |
1731 | fc_host_supported_speeds(lport->host) = 0; | |
1732 | if (lport->link_supported_speeds & FC_PORTSPEED_1GBIT) | |
1733 | fc_host_supported_speeds(lport->host) |= FC_PORTSPEED_1GBIT; | |
1734 | if (lport->link_supported_speeds & FC_PORTSPEED_10GBIT) | |
1735 | fc_host_supported_speeds(lport->host) |= FC_PORTSPEED_10GBIT; | |
1736 | ||
1737 | return 0; | |
1738 | } | |
1739 | EXPORT_SYMBOL(fc_lport_init); |