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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> | |
a51ab396 | 97 | #include <linux/scatterlist.h> |
42e9a92f | 98 | |
8866a5d9 RL |
99 | #include "fc_libfc.h" |
100 | ||
42e9a92f RL |
101 | /* Fabric IDs to use for point-to-point mode, chosen on whims. */ |
102 | #define FC_LOCAL_PTP_FID_LO 0x010101 | |
103 | #define FC_LOCAL_PTP_FID_HI 0x010102 | |
104 | ||
105 | #define DNS_DELAY 3 /* Discovery delay after RSCN (in seconds)*/ | |
106 | ||
42e9a92f RL |
107 | static void fc_lport_error(struct fc_lport *, struct fc_frame *); |
108 | ||
109 | static void fc_lport_enter_reset(struct fc_lport *); | |
110 | static void fc_lport_enter_flogi(struct fc_lport *); | |
111 | static void fc_lport_enter_dns(struct fc_lport *); | |
c914f7d1 | 112 | static void fc_lport_enter_ns(struct fc_lport *, enum fc_lport_state); |
42e9a92f RL |
113 | static void fc_lport_enter_scr(struct fc_lport *); |
114 | static void fc_lport_enter_ready(struct fc_lport *); | |
115 | static void fc_lport_enter_logo(struct fc_lport *); | |
116 | ||
117 | static const char *fc_lport_state_names[] = { | |
b1d9fd55 | 118 | [LPORT_ST_DISABLED] = "disabled", |
42e9a92f RL |
119 | [LPORT_ST_FLOGI] = "FLOGI", |
120 | [LPORT_ST_DNS] = "dNS", | |
c9c7bd7a | 121 | [LPORT_ST_RNN_ID] = "RNN_ID", |
5baa17c3 | 122 | [LPORT_ST_RSNN_NN] = "RSNN_NN", |
c9866a54 | 123 | [LPORT_ST_RSPN_ID] = "RSPN_ID", |
42e9a92f RL |
124 | [LPORT_ST_RFT_ID] = "RFT_ID", |
125 | [LPORT_ST_SCR] = "SCR", | |
126 | [LPORT_ST_READY] = "Ready", | |
127 | [LPORT_ST_LOGO] = "LOGO", | |
128 | [LPORT_ST_RESET] = "reset", | |
129 | }; | |
130 | ||
a51ab396 SM |
131 | /** |
132 | * struct fc_bsg_info - FC Passthrough managemet structure | |
133 | * @job: The passthrough job | |
134 | * @lport: The local port to pass through a command | |
135 | * @rsp_code: The expected response code | |
3a3b42bf | 136 | * @sg: job->reply_payload.sg_list |
a51ab396 SM |
137 | * @nents: job->reply_payload.sg_cnt |
138 | * @offset: The offset into the response data | |
139 | */ | |
140 | struct fc_bsg_info { | |
141 | struct fc_bsg_job *job; | |
142 | struct fc_lport *lport; | |
143 | u16 rsp_code; | |
144 | struct scatterlist *sg; | |
145 | u32 nents; | |
146 | size_t offset; | |
147 | }; | |
148 | ||
3a3b42bf RL |
149 | /** |
150 | * fc_frame_drop() - Dummy frame handler | |
151 | * @lport: The local port the frame was received on | |
152 | * @fp: The received frame | |
153 | */ | |
42e9a92f RL |
154 | static int fc_frame_drop(struct fc_lport *lport, struct fc_frame *fp) |
155 | { | |
156 | fc_frame_free(fp); | |
157 | return 0; | |
158 | } | |
159 | ||
160 | /** | |
34f42a07 | 161 | * fc_lport_rport_callback() - Event handler for rport events |
42e9a92f | 162 | * @lport: The lport which is receiving the event |
9fb9d328 | 163 | * @rdata: private remote port data |
42e9a92f RL |
164 | * @event: The event that occured |
165 | * | |
166 | * Locking Note: The rport lock should not be held when calling | |
167 | * this function. | |
168 | */ | |
169 | static void fc_lport_rport_callback(struct fc_lport *lport, | |
9fb9d328 | 170 | struct fc_rport_priv *rdata, |
42e9a92f RL |
171 | enum fc_rport_event event) |
172 | { | |
7414705e | 173 | FC_LPORT_DBG(lport, "Received a %d event for port (%6x)\n", event, |
f211fa51 | 174 | rdata->ids.port_id); |
42e9a92f | 175 | |
b5cbf083 | 176 | mutex_lock(&lport->lp_mutex); |
42e9a92f | 177 | switch (event) { |
4c0f62b5 | 178 | case RPORT_EV_READY: |
b5cbf083 | 179 | if (lport->state == LPORT_ST_DNS) { |
3a3b42bf | 180 | lport->dns_rdata = rdata; |
c914f7d1 | 181 | fc_lport_enter_ns(lport, LPORT_ST_RNN_ID); |
b5cbf083 JE |
182 | } else { |
183 | FC_LPORT_DBG(lport, "Received an READY event " | |
184 | "on port (%6x) for the directory " | |
185 | "server, but the lport is not " | |
186 | "in the DNS state, it's in the " | |
187 | "%d state", rdata->ids.port_id, | |
188 | lport->state); | |
189 | lport->tt.rport_logoff(rdata); | |
190 | } | |
42e9a92f RL |
191 | break; |
192 | case RPORT_EV_LOGO: | |
193 | case RPORT_EV_FAILED: | |
194 | case RPORT_EV_STOP: | |
3a3b42bf | 195 | lport->dns_rdata = NULL; |
42e9a92f RL |
196 | break; |
197 | case RPORT_EV_NONE: | |
198 | break; | |
199 | } | |
b5cbf083 | 200 | mutex_unlock(&lport->lp_mutex); |
42e9a92f RL |
201 | } |
202 | ||
203 | /** | |
34f42a07 | 204 | * fc_lport_state() - Return a string which represents the lport's state |
42e9a92f RL |
205 | * @lport: The lport whose state is to converted to a string |
206 | */ | |
207 | static const char *fc_lport_state(struct fc_lport *lport) | |
208 | { | |
209 | const char *cp; | |
210 | ||
211 | cp = fc_lport_state_names[lport->state]; | |
212 | if (!cp) | |
213 | cp = "unknown"; | |
214 | return cp; | |
215 | } | |
216 | ||
217 | /** | |
34f42a07 | 218 | * fc_lport_ptp_setup() - Create an rport for point-to-point mode |
3a3b42bf RL |
219 | * @lport: The lport to attach the ptp rport to |
220 | * @remote_fid: The FID of the ptp rport | |
42e9a92f RL |
221 | * @remote_wwpn: The WWPN of the ptp rport |
222 | * @remote_wwnn: The WWNN of the ptp rport | |
223 | */ | |
224 | static void fc_lport_ptp_setup(struct fc_lport *lport, | |
225 | u32 remote_fid, u64 remote_wwpn, | |
226 | u64 remote_wwnn) | |
227 | { | |
48f00902 | 228 | mutex_lock(&lport->disc.disc_mutex); |
3a3b42bf RL |
229 | if (lport->ptp_rdata) |
230 | lport->tt.rport_logoff(lport->ptp_rdata); | |
231 | lport->ptp_rdata = lport->tt.rport_create(lport, remote_fid); | |
232 | lport->ptp_rdata->ids.port_name = remote_wwpn; | |
233 | lport->ptp_rdata->ids.node_name = remote_wwnn; | |
48f00902 | 234 | mutex_unlock(&lport->disc.disc_mutex); |
42e9a92f | 235 | |
3a3b42bf | 236 | lport->tt.rport_login(lport->ptp_rdata); |
42e9a92f RL |
237 | |
238 | fc_lport_enter_ready(lport); | |
239 | } | |
240 | ||
3a3b42bf RL |
241 | /** |
242 | * fc_get_host_port_type() - Return the port type of the given Scsi_Host | |
243 | * @shost: The SCSI host whose port type is to be determined | |
244 | */ | |
42e9a92f RL |
245 | void fc_get_host_port_type(struct Scsi_Host *shost) |
246 | { | |
247 | /* TODO - currently just NPORT */ | |
248 | fc_host_port_type(shost) = FC_PORTTYPE_NPORT; | |
249 | } | |
250 | EXPORT_SYMBOL(fc_get_host_port_type); | |
251 | ||
3a3b42bf RL |
252 | /** |
253 | * fc_get_host_port_state() - Return the port state of the given Scsi_Host | |
254 | * @shost: The SCSI host whose port state is to be determined | |
255 | */ | |
42e9a92f RL |
256 | void fc_get_host_port_state(struct Scsi_Host *shost) |
257 | { | |
3a3b42bf | 258 | struct fc_lport *lport = shost_priv(shost); |
42e9a92f | 259 | |
3a3b42bf RL |
260 | mutex_lock(&lport->lp_mutex); |
261 | if (!lport->link_up) | |
8faecddb | 262 | fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN; |
42e9a92f | 263 | else |
3a3b42bf | 264 | switch (lport->state) { |
8faecddb CL |
265 | case LPORT_ST_READY: |
266 | fc_host_port_state(shost) = FC_PORTSTATE_ONLINE; | |
267 | break; | |
268 | default: | |
269 | fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE; | |
270 | } | |
3a3b42bf | 271 | mutex_unlock(&lport->lp_mutex); |
42e9a92f RL |
272 | } |
273 | EXPORT_SYMBOL(fc_get_host_port_state); | |
274 | ||
3a3b42bf RL |
275 | /** |
276 | * fc_get_host_speed() - Return the speed of the given Scsi_Host | |
277 | * @shost: The SCSI host whose port speed is to be determined | |
278 | */ | |
42e9a92f RL |
279 | void fc_get_host_speed(struct Scsi_Host *shost) |
280 | { | |
281 | struct fc_lport *lport = shost_priv(shost); | |
282 | ||
283 | fc_host_speed(shost) = lport->link_speed; | |
284 | } | |
285 | EXPORT_SYMBOL(fc_get_host_speed); | |
286 | ||
3a3b42bf RL |
287 | /** |
288 | * fc_get_host_stats() - Return the Scsi_Host's statistics | |
289 | * @shost: The SCSI host whose statistics are to be returned | |
290 | */ | |
42e9a92f RL |
291 | struct fc_host_statistics *fc_get_host_stats(struct Scsi_Host *shost) |
292 | { | |
42e9a92f | 293 | struct fc_host_statistics *fcoe_stats; |
3a3b42bf | 294 | struct fc_lport *lport = shost_priv(shost); |
42e9a92f | 295 | struct timespec v0, v1; |
582b45bc | 296 | unsigned int cpu; |
42e9a92f | 297 | |
3a3b42bf | 298 | fcoe_stats = &lport->host_stats; |
42e9a92f RL |
299 | memset(fcoe_stats, 0, sizeof(struct fc_host_statistics)); |
300 | ||
301 | jiffies_to_timespec(jiffies, &v0); | |
3a3b42bf | 302 | jiffies_to_timespec(lport->boot_time, &v1); |
42e9a92f RL |
303 | fcoe_stats->seconds_since_last_reset = (v0.tv_sec - v1.tv_sec); |
304 | ||
582b45bc RL |
305 | for_each_possible_cpu(cpu) { |
306 | struct fcoe_dev_stats *stats; | |
307 | ||
3a3b42bf | 308 | stats = per_cpu_ptr(lport->dev_stats, cpu); |
582b45bc | 309 | |
42e9a92f RL |
310 | fcoe_stats->tx_frames += stats->TxFrames; |
311 | fcoe_stats->tx_words += stats->TxWords; | |
312 | fcoe_stats->rx_frames += stats->RxFrames; | |
313 | fcoe_stats->rx_words += stats->RxWords; | |
314 | fcoe_stats->error_frames += stats->ErrorFrames; | |
315 | fcoe_stats->invalid_crc_count += stats->InvalidCRCCount; | |
316 | fcoe_stats->fcp_input_requests += stats->InputRequests; | |
317 | fcoe_stats->fcp_output_requests += stats->OutputRequests; | |
318 | fcoe_stats->fcp_control_requests += stats->ControlRequests; | |
319 | fcoe_stats->fcp_input_megabytes += stats->InputMegabytes; | |
320 | fcoe_stats->fcp_output_megabytes += stats->OutputMegabytes; | |
321 | fcoe_stats->link_failure_count += stats->LinkFailureCount; | |
322 | } | |
323 | fcoe_stats->lip_count = -1; | |
324 | fcoe_stats->nos_count = -1; | |
325 | fcoe_stats->loss_of_sync_count = -1; | |
326 | fcoe_stats->loss_of_signal_count = -1; | |
327 | fcoe_stats->prim_seq_protocol_err_count = -1; | |
328 | fcoe_stats->dumped_frames = -1; | |
329 | return fcoe_stats; | |
330 | } | |
331 | EXPORT_SYMBOL(fc_get_host_stats); | |
332 | ||
3a3b42bf RL |
333 | /** |
334 | * fc_lport_flogi_fill() - Fill in FLOGI command for request | |
335 | * @lport: The local port the FLOGI is for | |
336 | * @flogi: The FLOGI command | |
337 | * @op: The opcode | |
42e9a92f | 338 | */ |
3a3b42bf RL |
339 | static void fc_lport_flogi_fill(struct fc_lport *lport, |
340 | struct fc_els_flogi *flogi, | |
341 | unsigned int op) | |
42e9a92f RL |
342 | { |
343 | struct fc_els_csp *sp; | |
344 | struct fc_els_cssp *cp; | |
345 | ||
346 | memset(flogi, 0, sizeof(*flogi)); | |
347 | flogi->fl_cmd = (u8) op; | |
348 | put_unaligned_be64(lport->wwpn, &flogi->fl_wwpn); | |
349 | put_unaligned_be64(lport->wwnn, &flogi->fl_wwnn); | |
350 | sp = &flogi->fl_csp; | |
351 | sp->sp_hi_ver = 0x20; | |
352 | sp->sp_lo_ver = 0x20; | |
353 | sp->sp_bb_cred = htons(10); /* this gets set by gateway */ | |
354 | sp->sp_bb_data = htons((u16) lport->mfs); | |
355 | cp = &flogi->fl_cssp[3 - 1]; /* class 3 parameters */ | |
356 | cp->cp_class = htons(FC_CPC_VALID | FC_CPC_SEQ); | |
357 | if (op != ELS_FLOGI) { | |
358 | sp->sp_features = htons(FC_SP_FT_CIRO); | |
359 | sp->sp_tot_seq = htons(255); /* seq. we accept */ | |
360 | sp->sp_rel_off = htons(0x1f); | |
361 | sp->sp_e_d_tov = htonl(lport->e_d_tov); | |
362 | ||
363 | cp->cp_rdfs = htons((u16) lport->mfs); | |
364 | cp->cp_con_seq = htons(255); | |
365 | cp->cp_open_seq = 1; | |
366 | } | |
367 | } | |
368 | ||
3a3b42bf RL |
369 | /** |
370 | * fc_lport_add_fc4_type() - Add a supported FC-4 type to a local port | |
371 | * @lport: The local port to add a new FC-4 type to | |
372 | * @type: The new FC-4 type | |
42e9a92f RL |
373 | */ |
374 | static void fc_lport_add_fc4_type(struct fc_lport *lport, enum fc_fh_type type) | |
375 | { | |
376 | __be32 *mp; | |
377 | ||
378 | mp = &lport->fcts.ff_type_map[type / FC_NS_BPW]; | |
379 | *mp = htonl(ntohl(*mp) | 1UL << (type % FC_NS_BPW)); | |
380 | } | |
381 | ||
382 | /** | |
34f42a07 | 383 | * fc_lport_recv_rlir_req() - Handle received Registered Link Incident Report. |
3a3b42bf RL |
384 | * @sp: The sequence in the RLIR exchange |
385 | * @fp: The RLIR request frame | |
42e9a92f | 386 | * @lport: Fibre Channel local port recieving the RLIR |
42e9a92f | 387 | * |
1b69bc06 | 388 | * Locking Note: The lport lock is expected to be held before calling |
42e9a92f RL |
389 | * this function. |
390 | */ | |
391 | static void fc_lport_recv_rlir_req(struct fc_seq *sp, struct fc_frame *fp, | |
392 | struct fc_lport *lport) | |
393 | { | |
7414705e RL |
394 | FC_LPORT_DBG(lport, "Received RLIR request while in state %s\n", |
395 | fc_lport_state(lport)); | |
42e9a92f RL |
396 | |
397 | lport->tt.seq_els_rsp_send(sp, ELS_LS_ACC, NULL); | |
398 | fc_frame_free(fp); | |
399 | } | |
400 | ||
401 | /** | |
34f42a07 | 402 | * fc_lport_recv_echo_req() - Handle received ECHO request |
3a3b42bf RL |
403 | * @sp: The sequence in the ECHO exchange |
404 | * @fp: ECHO request frame | |
405 | * @lport: The local port recieving the ECHO | |
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_echo_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 | unsigned int len; | |
416 | void *pp; | |
417 | void *dp; | |
418 | u32 f_ctl; | |
419 | ||
1b69bc06 | 420 | FC_LPORT_DBG(lport, "Received ECHO request while in state %s\n", |
7414705e | 421 | fc_lport_state(lport)); |
42e9a92f RL |
422 | |
423 | len = fr_len(in_fp) - sizeof(struct fc_frame_header); | |
424 | pp = fc_frame_payload_get(in_fp, len); | |
425 | ||
426 | if (len < sizeof(__be32)) | |
427 | len = sizeof(__be32); | |
428 | ||
429 | fp = fc_frame_alloc(lport, len); | |
430 | if (fp) { | |
431 | dp = fc_frame_payload_get(fp, len); | |
432 | memcpy(dp, pp, len); | |
1b69bc06 | 433 | *((__be32 *)dp) = htonl(ELS_LS_ACC << 24); |
42e9a92f RL |
434 | sp = lport->tt.seq_start_next(sp); |
435 | f_ctl = FC_FC_EX_CTX | FC_FC_LAST_SEQ | FC_FC_END_SEQ; | |
436 | fc_fill_fc_hdr(fp, FC_RCTL_ELS_REP, ep->did, ep->sid, | |
437 | FC_TYPE_ELS, f_ctl, 0); | |
438 | lport->tt.seq_send(lport, sp, fp); | |
439 | } | |
440 | fc_frame_free(in_fp); | |
441 | } | |
442 | ||
443 | /** | |
1b69bc06 JE |
444 | * fc_lport_recv_rnid_req() - Handle received Request Node ID data request |
445 | * @sp: The sequence in the RNID exchange | |
446 | * @fp: The RNID request frame | |
447 | * @lport: The local port recieving the RNID | |
42e9a92f | 448 | * |
1b69bc06 | 449 | * Locking Note: The lport lock is expected to be held before calling |
42e9a92f RL |
450 | * this function. |
451 | */ | |
452 | static void fc_lport_recv_rnid_req(struct fc_seq *sp, struct fc_frame *in_fp, | |
453 | struct fc_lport *lport) | |
454 | { | |
455 | struct fc_frame *fp; | |
456 | struct fc_exch *ep = fc_seq_exch(sp); | |
457 | struct fc_els_rnid *req; | |
458 | struct { | |
459 | struct fc_els_rnid_resp rnid; | |
460 | struct fc_els_rnid_cid cid; | |
461 | struct fc_els_rnid_gen gen; | |
462 | } *rp; | |
463 | struct fc_seq_els_data rjt_data; | |
464 | u8 fmt; | |
465 | size_t len; | |
466 | u32 f_ctl; | |
467 | ||
7414705e RL |
468 | FC_LPORT_DBG(lport, "Received RNID request while in state %s\n", |
469 | fc_lport_state(lport)); | |
42e9a92f RL |
470 | |
471 | req = fc_frame_payload_get(in_fp, sizeof(*req)); | |
472 | if (!req) { | |
473 | rjt_data.fp = NULL; | |
474 | rjt_data.reason = ELS_RJT_LOGIC; | |
475 | rjt_data.explan = ELS_EXPL_NONE; | |
476 | lport->tt.seq_els_rsp_send(sp, ELS_LS_RJT, &rjt_data); | |
477 | } else { | |
478 | fmt = req->rnid_fmt; | |
479 | len = sizeof(*rp); | |
480 | if (fmt != ELS_RNIDF_GEN || | |
481 | ntohl(lport->rnid_gen.rnid_atype) == 0) { | |
482 | fmt = ELS_RNIDF_NONE; /* nothing to provide */ | |
483 | len -= sizeof(rp->gen); | |
484 | } | |
485 | fp = fc_frame_alloc(lport, len); | |
486 | if (fp) { | |
487 | rp = fc_frame_payload_get(fp, len); | |
488 | memset(rp, 0, len); | |
489 | rp->rnid.rnid_cmd = ELS_LS_ACC; | |
490 | rp->rnid.rnid_fmt = fmt; | |
491 | rp->rnid.rnid_cid_len = sizeof(rp->cid); | |
492 | rp->cid.rnid_wwpn = htonll(lport->wwpn); | |
493 | rp->cid.rnid_wwnn = htonll(lport->wwnn); | |
494 | if (fmt == ELS_RNIDF_GEN) { | |
495 | rp->rnid.rnid_sid_len = sizeof(rp->gen); | |
496 | memcpy(&rp->gen, &lport->rnid_gen, | |
497 | sizeof(rp->gen)); | |
498 | } | |
499 | sp = lport->tt.seq_start_next(sp); | |
500 | f_ctl = FC_FC_EX_CTX | FC_FC_LAST_SEQ; | |
501 | f_ctl |= FC_FC_END_SEQ | FC_FC_SEQ_INIT; | |
502 | fc_fill_fc_hdr(fp, FC_RCTL_ELS_REP, ep->did, ep->sid, | |
503 | FC_TYPE_ELS, f_ctl, 0); | |
504 | lport->tt.seq_send(lport, sp, fp); | |
505 | } | |
506 | } | |
507 | fc_frame_free(in_fp); | |
508 | } | |
509 | ||
42e9a92f | 510 | /** |
34f42a07 | 511 | * fc_lport_recv_logo_req() - Handle received fabric LOGO request |
3a3b42bf RL |
512 | * @sp: The sequence in the LOGO exchange |
513 | * @fp: The LOGO request frame | |
514 | * @lport: The local port recieving the LOGO | |
42e9a92f RL |
515 | * |
516 | * Locking Note: The lport lock is exected to be held before calling | |
517 | * this function. | |
518 | */ | |
519 | static void fc_lport_recv_logo_req(struct fc_seq *sp, struct fc_frame *fp, | |
520 | struct fc_lport *lport) | |
521 | { | |
522 | lport->tt.seq_els_rsp_send(sp, ELS_LS_ACC, NULL); | |
523 | fc_lport_enter_reset(lport); | |
524 | fc_frame_free(fp); | |
525 | } | |
526 | ||
527 | /** | |
34f42a07 | 528 | * fc_fabric_login() - Start the lport state machine |
3a3b42bf | 529 | * @lport: The local port that should log into the fabric |
42e9a92f RL |
530 | * |
531 | * Locking Note: This function should not be called | |
532 | * with the lport lock held. | |
533 | */ | |
534 | int fc_fabric_login(struct fc_lport *lport) | |
535 | { | |
536 | int rc = -1; | |
537 | ||
538 | mutex_lock(&lport->lp_mutex); | |
b1d9fd55 | 539 | if (lport->state == LPORT_ST_DISABLED) { |
42e9a92f RL |
540 | fc_lport_enter_reset(lport); |
541 | rc = 0; | |
542 | } | |
543 | mutex_unlock(&lport->lp_mutex); | |
544 | ||
545 | return rc; | |
546 | } | |
547 | EXPORT_SYMBOL(fc_fabric_login); | |
548 | ||
549 | /** | |
8faecddb | 550 | * __fc_linkup() - Handler for transport linkup events |
42e9a92f | 551 | * @lport: The lport whose link is up |
8faecddb CL |
552 | * |
553 | * Locking: must be called with the lp_mutex held | |
42e9a92f | 554 | */ |
8faecddb | 555 | void __fc_linkup(struct fc_lport *lport) |
42e9a92f | 556 | { |
bc0e17f6 VD |
557 | if (!lport->link_up) { |
558 | lport->link_up = 1; | |
42e9a92f RL |
559 | |
560 | if (lport->state == LPORT_ST_RESET) | |
561 | fc_lport_enter_flogi(lport); | |
562 | } | |
8faecddb CL |
563 | } |
564 | ||
565 | /** | |
566 | * fc_linkup() - Handler for transport linkup events | |
3a3b42bf | 567 | * @lport: The local port whose link is up |
8faecddb CL |
568 | */ |
569 | void fc_linkup(struct fc_lport *lport) | |
570 | { | |
571 | printk(KERN_INFO "libfc: Link up on port (%6x)\n", | |
572 | fc_host_port_id(lport->host)); | |
573 | ||
574 | mutex_lock(&lport->lp_mutex); | |
575 | __fc_linkup(lport); | |
42e9a92f RL |
576 | mutex_unlock(&lport->lp_mutex); |
577 | } | |
578 | EXPORT_SYMBOL(fc_linkup); | |
579 | ||
580 | /** | |
8faecddb | 581 | * __fc_linkdown() - Handler for transport linkdown events |
42e9a92f | 582 | * @lport: The lport whose link is down |
8faecddb CL |
583 | * |
584 | * Locking: must be called with the lp_mutex held | |
42e9a92f | 585 | */ |
8faecddb | 586 | void __fc_linkdown(struct fc_lport *lport) |
42e9a92f | 587 | { |
bc0e17f6 VD |
588 | if (lport->link_up) { |
589 | lport->link_up = 0; | |
42e9a92f RL |
590 | fc_lport_enter_reset(lport); |
591 | lport->tt.fcp_cleanup(lport); | |
592 | } | |
8faecddb CL |
593 | } |
594 | ||
595 | /** | |
596 | * fc_linkdown() - Handler for transport linkdown events | |
3a3b42bf | 597 | * @lport: The local port whose link is down |
8faecddb CL |
598 | */ |
599 | void fc_linkdown(struct fc_lport *lport) | |
600 | { | |
601 | printk(KERN_INFO "libfc: Link down on port (%6x)\n", | |
602 | fc_host_port_id(lport->host)); | |
603 | ||
604 | mutex_lock(&lport->lp_mutex); | |
605 | __fc_linkdown(lport); | |
42e9a92f RL |
606 | mutex_unlock(&lport->lp_mutex); |
607 | } | |
608 | EXPORT_SYMBOL(fc_linkdown); | |
609 | ||
42e9a92f | 610 | /** |
34f42a07 | 611 | * fc_fabric_logoff() - Logout of the fabric |
3a3b42bf | 612 | * @lport: The local port to logoff the fabric |
42e9a92f RL |
613 | * |
614 | * Return value: | |
615 | * 0 for success, -1 for failure | |
34f42a07 | 616 | */ |
42e9a92f RL |
617 | int fc_fabric_logoff(struct fc_lport *lport) |
618 | { | |
619 | lport->tt.disc_stop_final(lport); | |
620 | mutex_lock(&lport->lp_mutex); | |
3a3b42bf RL |
621 | if (lport->dns_rdata) |
622 | lport->tt.rport_logoff(lport->dns_rdata); | |
a0fd2e49 AJ |
623 | mutex_unlock(&lport->lp_mutex); |
624 | lport->tt.rport_flush_queue(); | |
625 | mutex_lock(&lport->lp_mutex); | |
42e9a92f RL |
626 | fc_lport_enter_logo(lport); |
627 | mutex_unlock(&lport->lp_mutex); | |
f7db2c15 | 628 | cancel_delayed_work_sync(&lport->retry_work); |
42e9a92f RL |
629 | return 0; |
630 | } | |
631 | EXPORT_SYMBOL(fc_fabric_logoff); | |
632 | ||
633 | /** | |
3a3b42bf RL |
634 | * fc_lport_destroy() - Unregister a fc_lport |
635 | * @lport: The local port to unregister | |
42e9a92f | 636 | * |
42e9a92f RL |
637 | * Note: |
638 | * exit routine for fc_lport instance | |
639 | * clean-up all the allocated memory | |
640 | * and free up other system resources. | |
641 | * | |
34f42a07 | 642 | */ |
42e9a92f RL |
643 | int fc_lport_destroy(struct fc_lport *lport) |
644 | { | |
bbf15669 | 645 | mutex_lock(&lport->lp_mutex); |
b1d9fd55 | 646 | lport->state = LPORT_ST_DISABLED; |
bbf15669 | 647 | lport->link_up = 0; |
42e9a92f | 648 | lport->tt.frame_send = fc_frame_drop; |
bbf15669 AJ |
649 | mutex_unlock(&lport->lp_mutex); |
650 | ||
42e9a92f | 651 | lport->tt.fcp_abort_io(lport); |
e9ba8b42 | 652 | lport->tt.disc_stop_final(lport); |
1f6ff364 | 653 | lport->tt.exch_mgr_reset(lport, 0, 0); |
42e9a92f RL |
654 | return 0; |
655 | } | |
656 | EXPORT_SYMBOL(fc_lport_destroy); | |
657 | ||
658 | /** | |
3a3b42bf RL |
659 | * fc_set_mfs() - Set the maximum frame size for a local port |
660 | * @lport: The local port to set the MFS for | |
661 | * @mfs: The new MFS | |
34f42a07 | 662 | */ |
42e9a92f RL |
663 | int fc_set_mfs(struct fc_lport *lport, u32 mfs) |
664 | { | |
665 | unsigned int old_mfs; | |
666 | int rc = -EINVAL; | |
667 | ||
668 | mutex_lock(&lport->lp_mutex); | |
669 | ||
670 | old_mfs = lport->mfs; | |
671 | ||
672 | if (mfs >= FC_MIN_MAX_FRAME) { | |
673 | mfs &= ~3; | |
674 | if (mfs > FC_MAX_FRAME) | |
675 | mfs = FC_MAX_FRAME; | |
676 | mfs -= sizeof(struct fc_frame_header); | |
677 | lport->mfs = mfs; | |
678 | rc = 0; | |
679 | } | |
680 | ||
681 | if (!rc && mfs < old_mfs) | |
682 | fc_lport_enter_reset(lport); | |
683 | ||
684 | mutex_unlock(&lport->lp_mutex); | |
685 | ||
686 | return rc; | |
687 | } | |
688 | EXPORT_SYMBOL(fc_set_mfs); | |
689 | ||
690 | /** | |
34f42a07 | 691 | * fc_lport_disc_callback() - Callback for discovery events |
3a3b42bf | 692 | * @lport: The local port receiving the event |
42e9a92f RL |
693 | * @event: The discovery event |
694 | */ | |
695 | void fc_lport_disc_callback(struct fc_lport *lport, enum fc_disc_event event) | |
696 | { | |
697 | switch (event) { | |
698 | case DISC_EV_SUCCESS: | |
7414705e | 699 | FC_LPORT_DBG(lport, "Discovery succeeded\n"); |
42e9a92f RL |
700 | break; |
701 | case DISC_EV_FAILED: | |
7414705e RL |
702 | printk(KERN_ERR "libfc: Discovery failed for port (%6x)\n", |
703 | fc_host_port_id(lport->host)); | |
42e9a92f RL |
704 | mutex_lock(&lport->lp_mutex); |
705 | fc_lport_enter_reset(lport); | |
706 | mutex_unlock(&lport->lp_mutex); | |
707 | break; | |
708 | case DISC_EV_NONE: | |
709 | WARN_ON(1); | |
710 | break; | |
711 | } | |
712 | } | |
713 | ||
714 | /** | |
34f42a07 | 715 | * fc_rport_enter_ready() - Enter the ready state and start discovery |
3a3b42bf | 716 | * @lport: The local port that is ready |
42e9a92f RL |
717 | * |
718 | * Locking Note: The lport lock is expected to be held before calling | |
719 | * this routine. | |
720 | */ | |
721 | static void fc_lport_enter_ready(struct fc_lport *lport) | |
722 | { | |
7414705e RL |
723 | FC_LPORT_DBG(lport, "Entered READY from state %s\n", |
724 | fc_lport_state(lport)); | |
42e9a92f RL |
725 | |
726 | fc_lport_state_enter(lport, LPORT_ST_READY); | |
8faecddb CL |
727 | if (lport->vport) |
728 | fc_vport_set_state(lport->vport, FC_VPORT_ACTIVE); | |
729 | fc_vports_linkchange(lport); | |
42e9a92f | 730 | |
3a3b42bf | 731 | if (!lport->ptp_rdata) |
29d898e9 | 732 | lport->tt.disc_start(fc_lport_disc_callback, lport); |
42e9a92f RL |
733 | } |
734 | ||
093bb6a2 JE |
735 | /** |
736 | * fc_lport_set_port_id() - set the local port Port ID | |
737 | * @lport: The local port which will have its Port ID set. | |
738 | * @port_id: The new port ID. | |
739 | * @fp: The frame containing the incoming request, or NULL. | |
740 | * | |
741 | * Locking Note: The lport lock is expected to be held before calling | |
742 | * this function. | |
743 | */ | |
744 | static void fc_lport_set_port_id(struct fc_lport *lport, u32 port_id, | |
745 | struct fc_frame *fp) | |
746 | { | |
747 | if (port_id) | |
748 | printk(KERN_INFO "host%d: Assigned Port ID %6x\n", | |
749 | lport->host->host_no, port_id); | |
750 | ||
751 | fc_host_port_id(lport->host) = port_id; | |
752 | if (lport->tt.lport_set_port_id) | |
753 | lport->tt.lport_set_port_id(lport, port_id, fp); | |
754 | } | |
755 | ||
42e9a92f | 756 | /** |
34f42a07 | 757 | * fc_lport_recv_flogi_req() - Receive a FLOGI request |
42e9a92f | 758 | * @sp_in: The sequence the FLOGI is on |
3a3b42bf RL |
759 | * @rx_fp: The FLOGI frame |
760 | * @lport: The local port that recieved the request | |
42e9a92f RL |
761 | * |
762 | * A received FLOGI request indicates a point-to-point connection. | |
763 | * Accept it with the common service parameters indicating our N port. | |
764 | * Set up to do a PLOGI if we have the higher-number WWPN. | |
765 | * | |
1b69bc06 | 766 | * Locking Note: The lport lock is expected to be held before calling |
42e9a92f RL |
767 | * this function. |
768 | */ | |
769 | static void fc_lport_recv_flogi_req(struct fc_seq *sp_in, | |
770 | struct fc_frame *rx_fp, | |
771 | struct fc_lport *lport) | |
772 | { | |
773 | struct fc_frame *fp; | |
774 | struct fc_frame_header *fh; | |
775 | struct fc_seq *sp; | |
776 | struct fc_exch *ep; | |
777 | struct fc_els_flogi *flp; | |
778 | struct fc_els_flogi *new_flp; | |
779 | u64 remote_wwpn; | |
780 | u32 remote_fid; | |
781 | u32 local_fid; | |
782 | u32 f_ctl; | |
783 | ||
7414705e RL |
784 | FC_LPORT_DBG(lport, "Received FLOGI request while in state %s\n", |
785 | fc_lport_state(lport)); | |
42e9a92f RL |
786 | |
787 | fh = fc_frame_header_get(rx_fp); | |
788 | remote_fid = ntoh24(fh->fh_s_id); | |
789 | flp = fc_frame_payload_get(rx_fp, sizeof(*flp)); | |
790 | if (!flp) | |
791 | goto out; | |
792 | remote_wwpn = get_unaligned_be64(&flp->fl_wwpn); | |
793 | if (remote_wwpn == lport->wwpn) { | |
7414705e RL |
794 | printk(KERN_WARNING "libfc: Received FLOGI from port " |
795 | "with same WWPN %llx\n", remote_wwpn); | |
42e9a92f RL |
796 | goto out; |
797 | } | |
7414705e | 798 | FC_LPORT_DBG(lport, "FLOGI from port WWPN %llx\n", remote_wwpn); |
42e9a92f RL |
799 | |
800 | /* | |
801 | * XXX what is the right thing to do for FIDs? | |
802 | * The originator might expect our S_ID to be 0xfffffe. | |
803 | * But if so, both of us could end up with the same FID. | |
804 | */ | |
805 | local_fid = FC_LOCAL_PTP_FID_LO; | |
806 | if (remote_wwpn < lport->wwpn) { | |
807 | local_fid = FC_LOCAL_PTP_FID_HI; | |
808 | if (!remote_fid || remote_fid == local_fid) | |
809 | remote_fid = FC_LOCAL_PTP_FID_LO; | |
810 | } else if (!remote_fid) { | |
811 | remote_fid = FC_LOCAL_PTP_FID_HI; | |
812 | } | |
813 | ||
093bb6a2 | 814 | fc_lport_set_port_id(lport, local_fid, rx_fp); |
42e9a92f RL |
815 | |
816 | fp = fc_frame_alloc(lport, sizeof(*flp)); | |
817 | if (fp) { | |
818 | sp = lport->tt.seq_start_next(fr_seq(rx_fp)); | |
819 | new_flp = fc_frame_payload_get(fp, sizeof(*flp)); | |
820 | fc_lport_flogi_fill(lport, new_flp, ELS_FLOGI); | |
821 | new_flp->fl_cmd = (u8) ELS_LS_ACC; | |
822 | ||
823 | /* | |
824 | * Send the response. If this fails, the originator should | |
825 | * repeat the sequence. | |
826 | */ | |
827 | f_ctl = FC_FC_EX_CTX | FC_FC_LAST_SEQ | FC_FC_END_SEQ; | |
828 | ep = fc_seq_exch(sp); | |
829 | fc_fill_fc_hdr(fp, FC_RCTL_ELS_REP, ep->did, ep->sid, | |
830 | FC_TYPE_ELS, f_ctl, 0); | |
831 | lport->tt.seq_send(lport, sp, fp); | |
832 | ||
833 | } else { | |
834 | fc_lport_error(lport, fp); | |
835 | } | |
836 | fc_lport_ptp_setup(lport, remote_fid, remote_wwpn, | |
837 | get_unaligned_be64(&flp->fl_wwnn)); | |
838 | ||
42e9a92f RL |
839 | out: |
840 | sp = fr_seq(rx_fp); | |
841 | fc_frame_free(rx_fp); | |
842 | } | |
843 | ||
844 | /** | |
34f42a07 | 845 | * fc_lport_recv_req() - The generic lport request handler |
3a3b42bf RL |
846 | * @lport: The local port that received the request |
847 | * @sp: The sequence the request is on | |
848 | * @fp: The request frame | |
42e9a92f RL |
849 | * |
850 | * This function will see if the lport handles the request or | |
851 | * if an rport should handle the request. | |
852 | * | |
853 | * Locking Note: This function should not be called with the lport | |
854 | * lock held becuase it will grab the lock. | |
855 | */ | |
856 | static void fc_lport_recv_req(struct fc_lport *lport, struct fc_seq *sp, | |
857 | struct fc_frame *fp) | |
858 | { | |
859 | struct fc_frame_header *fh = fc_frame_header_get(fp); | |
860 | void (*recv) (struct fc_seq *, struct fc_frame *, struct fc_lport *); | |
42e9a92f RL |
861 | |
862 | mutex_lock(&lport->lp_mutex); | |
863 | ||
864 | /* | |
865 | * Handle special ELS cases like FLOGI, LOGO, and | |
866 | * RSCN here. These don't require a session. | |
867 | * Even if we had a session, it might not be ready. | |
868 | */ | |
e9ba8b42 JE |
869 | if (!lport->link_up) |
870 | fc_frame_free(fp); | |
871 | else if (fh->fh_type == FC_TYPE_ELS && | |
872 | fh->fh_r_ctl == FC_RCTL_ELS_REQ) { | |
42e9a92f RL |
873 | /* |
874 | * Check opcode. | |
875 | */ | |
131203a1 | 876 | recv = lport->tt.rport_recv_req; |
42e9a92f RL |
877 | switch (fc_frame_payload_op(fp)) { |
878 | case ELS_FLOGI: | |
879 | recv = fc_lport_recv_flogi_req; | |
880 | break; | |
881 | case ELS_LOGO: | |
882 | fh = fc_frame_header_get(fp); | |
883 | if (ntoh24(fh->fh_s_id) == FC_FID_FLOGI) | |
884 | recv = fc_lport_recv_logo_req; | |
885 | break; | |
886 | case ELS_RSCN: | |
887 | recv = lport->tt.disc_recv_req; | |
888 | break; | |
889 | case ELS_ECHO: | |
890 | recv = fc_lport_recv_echo_req; | |
891 | break; | |
892 | case ELS_RLIR: | |
893 | recv = fc_lport_recv_rlir_req; | |
894 | break; | |
895 | case ELS_RNID: | |
896 | recv = fc_lport_recv_rnid_req; | |
897 | break; | |
42e9a92f RL |
898 | } |
899 | ||
131203a1 | 900 | recv(sp, fp, lport); |
42e9a92f | 901 | } else { |
7414705e RL |
902 | FC_LPORT_DBG(lport, "dropping invalid frame (eof %x)\n", |
903 | fr_eof(fp)); | |
42e9a92f RL |
904 | fc_frame_free(fp); |
905 | } | |
906 | mutex_unlock(&lport->lp_mutex); | |
907 | ||
908 | /* | |
909 | * The common exch_done for all request may not be good | |
910 | * if any request requires longer hold on exhange. XXX | |
911 | */ | |
912 | lport->tt.exch_done(sp); | |
913 | } | |
914 | ||
915 | /** | |
3a3b42bf RL |
916 | * fc_lport_reset() - Reset a local port |
917 | * @lport: The local port which should be reset | |
42e9a92f RL |
918 | * |
919 | * Locking Note: This functions should not be called with the | |
920 | * lport lock held. | |
921 | */ | |
922 | int fc_lport_reset(struct fc_lport *lport) | |
923 | { | |
f7db2c15 | 924 | cancel_delayed_work_sync(&lport->retry_work); |
42e9a92f RL |
925 | mutex_lock(&lport->lp_mutex); |
926 | fc_lport_enter_reset(lport); | |
927 | mutex_unlock(&lport->lp_mutex); | |
928 | return 0; | |
929 | } | |
930 | EXPORT_SYMBOL(fc_lport_reset); | |
931 | ||
932 | /** | |
3a3b42bf RL |
933 | * fc_lport_reset_locked() - Reset the local port w/ the lport lock held |
934 | * @lport: The local port to be reset | |
42e9a92f RL |
935 | * |
936 | * Locking Note: The lport lock is expected to be held before calling | |
937 | * this routine. | |
938 | */ | |
1190d925 | 939 | static void fc_lport_reset_locked(struct fc_lport *lport) |
42e9a92f | 940 | { |
3a3b42bf RL |
941 | if (lport->dns_rdata) |
942 | lport->tt.rport_logoff(lport->dns_rdata); | |
42e9a92f | 943 | |
3a3b42bf | 944 | lport->ptp_rdata = NULL; |
42e9a92f RL |
945 | |
946 | lport->tt.disc_stop(lport); | |
947 | ||
1f6ff364 | 948 | lport->tt.exch_mgr_reset(lport, 0, 0); |
42e9a92f | 949 | fc_host_fabric_name(lport->host) = 0; |
093bb6a2 JE |
950 | |
951 | if (fc_host_port_id(lport->host)) | |
952 | fc_lport_set_port_id(lport, 0, NULL); | |
1190d925 | 953 | } |
42e9a92f | 954 | |
1190d925 JE |
955 | /** |
956 | * fc_lport_enter_reset() - Reset the local port | |
3a3b42bf | 957 | * @lport: The local port to be reset |
1190d925 JE |
958 | * |
959 | * Locking Note: The lport lock is expected to be held before calling | |
960 | * this routine. | |
961 | */ | |
962 | static void fc_lport_enter_reset(struct fc_lport *lport) | |
963 | { | |
964 | FC_LPORT_DBG(lport, "Entered RESET state from %s state\n", | |
965 | fc_lport_state(lport)); | |
966 | ||
8faecddb CL |
967 | if (lport->vport) { |
968 | if (lport->link_up) | |
969 | fc_vport_set_state(lport->vport, FC_VPORT_INITIALIZING); | |
970 | else | |
971 | fc_vport_set_state(lport->vport, FC_VPORT_LINKDOWN); | |
972 | } | |
1190d925 | 973 | fc_lport_state_enter(lport, LPORT_ST_RESET); |
8faecddb | 974 | fc_vports_linkchange(lport); |
1190d925 | 975 | fc_lport_reset_locked(lport); |
bc0e17f6 | 976 | if (lport->link_up) |
42e9a92f RL |
977 | fc_lport_enter_flogi(lport); |
978 | } | |
979 | ||
1190d925 | 980 | /** |
3a3b42bf RL |
981 | * fc_lport_enter_disabled() - Disable the local port |
982 | * @lport: The local port to be reset | |
1190d925 JE |
983 | * |
984 | * Locking Note: The lport lock is expected to be held before calling | |
985 | * this routine. | |
986 | */ | |
987 | static void fc_lport_enter_disabled(struct fc_lport *lport) | |
988 | { | |
989 | FC_LPORT_DBG(lport, "Entered disabled state from %s state\n", | |
990 | fc_lport_state(lport)); | |
991 | ||
992 | fc_lport_state_enter(lport, LPORT_ST_DISABLED); | |
8faecddb | 993 | fc_vports_linkchange(lport); |
1190d925 JE |
994 | fc_lport_reset_locked(lport); |
995 | } | |
996 | ||
42e9a92f | 997 | /** |
34f42a07 | 998 | * fc_lport_error() - Handler for any errors |
3a3b42bf RL |
999 | * @lport: The local port that the error was on |
1000 | * @fp: The error code encoded in a frame pointer | |
42e9a92f RL |
1001 | * |
1002 | * If the error was caused by a resource allocation failure | |
1003 | * then wait for half a second and retry, otherwise retry | |
1004 | * after the e_d_tov time. | |
1005 | */ | |
1006 | static void fc_lport_error(struct fc_lport *lport, struct fc_frame *fp) | |
1007 | { | |
1008 | unsigned long delay = 0; | |
7414705e RL |
1009 | FC_LPORT_DBG(lport, "Error %ld in state %s, retries %d\n", |
1010 | PTR_ERR(fp), fc_lport_state(lport), | |
1011 | lport->retry_count); | |
42e9a92f RL |
1012 | |
1013 | if (!fp || PTR_ERR(fp) == -FC_EX_TIMEOUT) { | |
1014 | /* | |
1015 | * Memory allocation failure, or the exchange timed out. | |
1016 | * Retry after delay | |
1017 | */ | |
1018 | if (lport->retry_count < lport->max_retry_count) { | |
1019 | lport->retry_count++; | |
1020 | if (!fp) | |
1021 | delay = msecs_to_jiffies(500); | |
1022 | else | |
1023 | delay = msecs_to_jiffies(lport->e_d_tov); | |
1024 | ||
1025 | schedule_delayed_work(&lport->retry_work, delay); | |
1026 | } else { | |
1027 | switch (lport->state) { | |
b1d9fd55 | 1028 | case LPORT_ST_DISABLED: |
42e9a92f RL |
1029 | case LPORT_ST_READY: |
1030 | case LPORT_ST_RESET: | |
c9c7bd7a | 1031 | case LPORT_ST_RNN_ID: |
5baa17c3 | 1032 | case LPORT_ST_RSNN_NN: |
c9866a54 | 1033 | case LPORT_ST_RSPN_ID: |
42e9a92f RL |
1034 | case LPORT_ST_RFT_ID: |
1035 | case LPORT_ST_SCR: | |
1036 | case LPORT_ST_DNS: | |
1037 | case LPORT_ST_FLOGI: | |
1038 | case LPORT_ST_LOGO: | |
1039 | fc_lport_enter_reset(lport); | |
1040 | break; | |
1041 | } | |
1042 | } | |
1043 | } | |
1044 | } | |
1045 | ||
1046 | /** | |
7cccc157 | 1047 | * fc_lport_ns_resp() - Handle response to a name server |
3a3b42bf RL |
1048 | * registration exchange |
1049 | * @sp: current sequence in exchange | |
1050 | * @fp: response frame | |
42e9a92f RL |
1051 | * @lp_arg: Fibre Channel host port instance |
1052 | * | |
1053 | * Locking Note: This function will be called without the lport lock | |
3a3b42bf | 1054 | * held, but it will lock, call an _enter_* function or fc_lport_error() |
42e9a92f RL |
1055 | * and then unlock the lport. |
1056 | */ | |
7cccc157 CL |
1057 | static void fc_lport_ns_resp(struct fc_seq *sp, struct fc_frame *fp, |
1058 | void *lp_arg) | |
42e9a92f RL |
1059 | { |
1060 | struct fc_lport *lport = lp_arg; | |
1061 | struct fc_frame_header *fh; | |
1062 | struct fc_ct_hdr *ct; | |
1063 | ||
7cccc157 | 1064 | FC_LPORT_DBG(lport, "Received a ns %s\n", fc_els_resp_type(fp)); |
f657d299 | 1065 | |
42e9a92f RL |
1066 | if (fp == ERR_PTR(-FC_EX_CLOSED)) |
1067 | return; | |
1068 | ||
1069 | mutex_lock(&lport->lp_mutex); | |
1070 | ||
7cccc157 CL |
1071 | if (lport->state < LPORT_ST_RNN_ID || lport->state > LPORT_ST_RFT_ID) { |
1072 | FC_LPORT_DBG(lport, "Received a name server response, " | |
3a3b42bf | 1073 | "but in state %s\n", fc_lport_state(lport)); |
76f6804e AJ |
1074 | if (IS_ERR(fp)) |
1075 | goto err; | |
42e9a92f RL |
1076 | goto out; |
1077 | } | |
1078 | ||
76f6804e AJ |
1079 | if (IS_ERR(fp)) { |
1080 | fc_lport_error(lport, fp); | |
1081 | goto err; | |
1082 | } | |
1083 | ||
42e9a92f RL |
1084 | fh = fc_frame_header_get(fp); |
1085 | ct = fc_frame_payload_get(fp, sizeof(*ct)); | |
1086 | ||
1087 | if (fh && ct && fh->fh_type == FC_TYPE_CT && | |
1088 | ct->ct_fs_type == FC_FST_DIR && | |
1089 | ct->ct_fs_subtype == FC_NS_SUBTYPE && | |
1090 | ntohs(ct->ct_cmd) == FC_FS_ACC) | |
7cccc157 CL |
1091 | switch (lport->state) { |
1092 | case LPORT_ST_RNN_ID: | |
c914f7d1 | 1093 | fc_lport_enter_ns(lport, LPORT_ST_RSNN_NN); |
7cccc157 CL |
1094 | break; |
1095 | case LPORT_ST_RSNN_NN: | |
c914f7d1 | 1096 | fc_lport_enter_ns(lport, LPORT_ST_RSPN_ID); |
7cccc157 CL |
1097 | break; |
1098 | case LPORT_ST_RSPN_ID: | |
c914f7d1 | 1099 | fc_lport_enter_ns(lport, LPORT_ST_RFT_ID); |
7cccc157 CL |
1100 | break; |
1101 | case LPORT_ST_RFT_ID: | |
1102 | fc_lport_enter_scr(lport); | |
1103 | break; | |
1104 | default: | |
1105 | /* should have already been caught by state checks */ | |
1106 | break; | |
1107 | } | |
c9c7bd7a CL |
1108 | else |
1109 | fc_lport_error(lport, fp); | |
c9c7bd7a CL |
1110 | out: |
1111 | fc_frame_free(fp); | |
1112 | err: | |
1113 | mutex_unlock(&lport->lp_mutex); | |
1114 | } | |
1115 | ||
42e9a92f | 1116 | /** |
34f42a07 | 1117 | * fc_lport_scr_resp() - Handle response to State Change Register (SCR) request |
3a3b42bf RL |
1118 | * @sp: current sequence in SCR exchange |
1119 | * @fp: response frame | |
42e9a92f RL |
1120 | * @lp_arg: Fibre Channel lport port instance that sent the registration request |
1121 | * | |
1122 | * Locking Note: This function will be called without the lport lock | |
1123 | * held, but it will lock, call an _enter_* function or fc_lport_error | |
1124 | * and then unlock the lport. | |
1125 | */ | |
1126 | static void fc_lport_scr_resp(struct fc_seq *sp, struct fc_frame *fp, | |
1127 | void *lp_arg) | |
1128 | { | |
1129 | struct fc_lport *lport = lp_arg; | |
1130 | u8 op; | |
1131 | ||
f657d299 JE |
1132 | FC_LPORT_DBG(lport, "Received a SCR %s\n", fc_els_resp_type(fp)); |
1133 | ||
42e9a92f RL |
1134 | if (fp == ERR_PTR(-FC_EX_CLOSED)) |
1135 | return; | |
1136 | ||
1137 | mutex_lock(&lport->lp_mutex); | |
1138 | ||
42e9a92f | 1139 | if (lport->state != LPORT_ST_SCR) { |
7414705e RL |
1140 | FC_LPORT_DBG(lport, "Received a SCR response, but in state " |
1141 | "%s\n", fc_lport_state(lport)); | |
76f6804e AJ |
1142 | if (IS_ERR(fp)) |
1143 | goto err; | |
42e9a92f RL |
1144 | goto out; |
1145 | } | |
1146 | ||
76f6804e AJ |
1147 | if (IS_ERR(fp)) { |
1148 | fc_lport_error(lport, fp); | |
1149 | goto err; | |
1150 | } | |
1151 | ||
42e9a92f RL |
1152 | op = fc_frame_payload_op(fp); |
1153 | if (op == ELS_LS_ACC) | |
1154 | fc_lport_enter_ready(lport); | |
1155 | else | |
1156 | fc_lport_error(lport, fp); | |
1157 | ||
1158 | out: | |
1159 | fc_frame_free(fp); | |
1160 | err: | |
1161 | mutex_unlock(&lport->lp_mutex); | |
1162 | } | |
1163 | ||
1164 | /** | |
3a3b42bf RL |
1165 | * fc_lport_enter_scr() - Send a SCR (State Change Register) request |
1166 | * @lport: The local port to register for state changes | |
42e9a92f RL |
1167 | * |
1168 | * Locking Note: The lport lock is expected to be held before calling | |
1169 | * this routine. | |
1170 | */ | |
1171 | static void fc_lport_enter_scr(struct fc_lport *lport) | |
1172 | { | |
1173 | struct fc_frame *fp; | |
1174 | ||
7414705e RL |
1175 | FC_LPORT_DBG(lport, "Entered SCR state from %s state\n", |
1176 | fc_lport_state(lport)); | |
42e9a92f RL |
1177 | |
1178 | fc_lport_state_enter(lport, LPORT_ST_SCR); | |
1179 | ||
1180 | fp = fc_frame_alloc(lport, sizeof(struct fc_els_scr)); | |
1181 | if (!fp) { | |
1182 | fc_lport_error(lport, fp); | |
1183 | return; | |
1184 | } | |
1185 | ||
a46f327a | 1186 | if (!lport->tt.elsct_send(lport, FC_FID_FCTRL, fp, ELS_SCR, |
42e9a92f | 1187 | fc_lport_scr_resp, lport, lport->e_d_tov)) |
8f550f93 | 1188 | fc_lport_error(lport, NULL); |
42e9a92f RL |
1189 | } |
1190 | ||
1191 | /** | |
c914f7d1 | 1192 | * fc_lport_enter_ns() - register some object with the name server |
42e9a92f RL |
1193 | * @lport: Fibre Channel local port to register |
1194 | * | |
1195 | * Locking Note: The lport lock is expected to be held before calling | |
1196 | * this routine. | |
1197 | */ | |
c914f7d1 | 1198 | static void fc_lport_enter_ns(struct fc_lport *lport, enum fc_lport_state state) |
c9866a54 CL |
1199 | { |
1200 | struct fc_frame *fp; | |
c914f7d1 CL |
1201 | enum fc_ns_req cmd; |
1202 | int size = sizeof(struct fc_ct_hdr); | |
c9866a54 CL |
1203 | size_t len; |
1204 | ||
c914f7d1 CL |
1205 | FC_LPORT_DBG(lport, "Entered %s state from %s state\n", |
1206 | fc_lport_state_names[state], | |
c9866a54 CL |
1207 | fc_lport_state(lport)); |
1208 | ||
c914f7d1 | 1209 | fc_lport_state_enter(lport, state); |
c9866a54 | 1210 | |
c914f7d1 CL |
1211 | switch (state) { |
1212 | case LPORT_ST_RNN_ID: | |
1213 | cmd = FC_NS_RNN_ID; | |
1214 | size += sizeof(struct fc_ns_rn_id); | |
1215 | break; | |
1216 | case LPORT_ST_RSNN_NN: | |
1217 | len = strnlen(fc_host_symbolic_name(lport->host), 255); | |
1218 | /* if there is no symbolic name, skip to RFT_ID */ | |
1219 | if (!len) | |
1220 | return fc_lport_enter_ns(lport, LPORT_ST_RFT_ID); | |
1221 | cmd = FC_NS_RSNN_NN; | |
1222 | size += sizeof(struct fc_ns_rsnn) + len; | |
1223 | break; | |
1224 | case LPORT_ST_RSPN_ID: | |
1225 | len = strnlen(fc_host_symbolic_name(lport->host), 255); | |
1226 | /* if there is no symbolic name, skip to RFT_ID */ | |
1227 | if (!len) | |
1228 | return fc_lport_enter_ns(lport, LPORT_ST_RFT_ID); | |
1229 | cmd = FC_NS_RSPN_ID; | |
1230 | size += sizeof(struct fc_ns_rspn) + len; | |
1231 | break; | |
1232 | case LPORT_ST_RFT_ID: | |
1233 | cmd = FC_NS_RFT_ID; | |
1234 | size += sizeof(struct fc_ns_rft); | |
1235 | break; | |
1236 | default: | |
1237 | fc_lport_error(lport, NULL); | |
5baa17c3 CL |
1238 | return; |
1239 | } | |
1240 | ||
c914f7d1 | 1241 | fp = fc_frame_alloc(lport, size); |
c9c7bd7a CL |
1242 | if (!fp) { |
1243 | fc_lport_error(lport, fp); | |
1244 | return; | |
1245 | } | |
1246 | ||
c914f7d1 | 1247 | if (!lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, cmd, |
7cccc157 | 1248 | fc_lport_ns_resp, |
c9c7bd7a CL |
1249 | lport, lport->e_d_tov)) |
1250 | fc_lport_error(lport, fp); | |
1251 | } | |
1252 | ||
42e9a92f RL |
1253 | static struct fc_rport_operations fc_lport_rport_ops = { |
1254 | .event_callback = fc_lport_rport_callback, | |
1255 | }; | |
1256 | ||
1257 | /** | |
3a3b42bf RL |
1258 | * fc_rport_enter_dns() - Create a fc_rport for the name server |
1259 | * @lport: The local port requesting a remote port for the name server | |
42e9a92f RL |
1260 | * |
1261 | * Locking Note: The lport lock is expected to be held before calling | |
1262 | * this routine. | |
1263 | */ | |
1264 | static void fc_lport_enter_dns(struct fc_lport *lport) | |
1265 | { | |
ab28f1fd | 1266 | struct fc_rport_priv *rdata; |
42e9a92f | 1267 | |
7414705e RL |
1268 | FC_LPORT_DBG(lport, "Entered DNS state from %s state\n", |
1269 | fc_lport_state(lport)); | |
42e9a92f RL |
1270 | |
1271 | fc_lport_state_enter(lport, LPORT_ST_DNS); | |
1272 | ||
48f00902 | 1273 | mutex_lock(&lport->disc.disc_mutex); |
9737e6a7 | 1274 | rdata = lport->tt.rport_create(lport, FC_FID_DIR_SERV); |
48f00902 | 1275 | mutex_unlock(&lport->disc.disc_mutex); |
9fb9d328 | 1276 | if (!rdata) |
42e9a92f RL |
1277 | goto err; |
1278 | ||
42e9a92f | 1279 | rdata->ops = &fc_lport_rport_ops; |
9fb9d328 | 1280 | lport->tt.rport_login(rdata); |
42e9a92f RL |
1281 | return; |
1282 | ||
1283 | err: | |
1284 | fc_lport_error(lport, NULL); | |
1285 | } | |
1286 | ||
1287 | /** | |
3a3b42bf RL |
1288 | * fc_lport_timeout() - Handler for the retry_work timer |
1289 | * @work: The work struct of the local port | |
42e9a92f RL |
1290 | */ |
1291 | static void fc_lport_timeout(struct work_struct *work) | |
1292 | { | |
1293 | struct fc_lport *lport = | |
1294 | container_of(work, struct fc_lport, | |
1295 | retry_work.work); | |
1296 | ||
1297 | mutex_lock(&lport->lp_mutex); | |
1298 | ||
1299 | switch (lport->state) { | |
b1d9fd55 | 1300 | case LPORT_ST_DISABLED: |
22655ac2 JE |
1301 | WARN_ON(1); |
1302 | break; | |
42e9a92f | 1303 | case LPORT_ST_READY: |
42e9a92f RL |
1304 | WARN_ON(1); |
1305 | break; | |
22655ac2 JE |
1306 | case LPORT_ST_RESET: |
1307 | break; | |
42e9a92f RL |
1308 | case LPORT_ST_FLOGI: |
1309 | fc_lport_enter_flogi(lport); | |
1310 | break; | |
1311 | case LPORT_ST_DNS: | |
1312 | fc_lport_enter_dns(lport); | |
1313 | break; | |
c9c7bd7a | 1314 | case LPORT_ST_RNN_ID: |
5baa17c3 | 1315 | case LPORT_ST_RSNN_NN: |
c9866a54 | 1316 | case LPORT_ST_RSPN_ID: |
42e9a92f | 1317 | case LPORT_ST_RFT_ID: |
c914f7d1 | 1318 | fc_lport_enter_ns(lport, lport->state); |
42e9a92f RL |
1319 | break; |
1320 | case LPORT_ST_SCR: | |
1321 | fc_lport_enter_scr(lport); | |
1322 | break; | |
1323 | case LPORT_ST_LOGO: | |
1324 | fc_lport_enter_logo(lport); | |
1325 | break; | |
1326 | } | |
1327 | ||
1328 | mutex_unlock(&lport->lp_mutex); | |
1329 | } | |
1330 | ||
1331 | /** | |
34f42a07 | 1332 | * fc_lport_logo_resp() - Handle response to LOGO request |
3a3b42bf RL |
1333 | * @sp: The sequence that the LOGO was on |
1334 | * @fp: The LOGO frame | |
1335 | * @lp_arg: The lport port that received the LOGO request | |
42e9a92f RL |
1336 | * |
1337 | * Locking Note: This function will be called without the lport lock | |
3a3b42bf | 1338 | * held, but it will lock, call an _enter_* function or fc_lport_error() |
42e9a92f RL |
1339 | * and then unlock the lport. |
1340 | */ | |
11b56188 | 1341 | void fc_lport_logo_resp(struct fc_seq *sp, struct fc_frame *fp, |
3a3b42bf | 1342 | void *lp_arg) |
42e9a92f RL |
1343 | { |
1344 | struct fc_lport *lport = lp_arg; | |
1345 | u8 op; | |
1346 | ||
f657d299 JE |
1347 | FC_LPORT_DBG(lport, "Received a LOGO %s\n", fc_els_resp_type(fp)); |
1348 | ||
42e9a92f RL |
1349 | if (fp == ERR_PTR(-FC_EX_CLOSED)) |
1350 | return; | |
1351 | ||
1352 | mutex_lock(&lport->lp_mutex); | |
1353 | ||
42e9a92f | 1354 | if (lport->state != LPORT_ST_LOGO) { |
7414705e RL |
1355 | FC_LPORT_DBG(lport, "Received a LOGO response, but in state " |
1356 | "%s\n", fc_lport_state(lport)); | |
76f6804e AJ |
1357 | if (IS_ERR(fp)) |
1358 | goto err; | |
42e9a92f RL |
1359 | goto out; |
1360 | } | |
1361 | ||
76f6804e AJ |
1362 | if (IS_ERR(fp)) { |
1363 | fc_lport_error(lport, fp); | |
1364 | goto err; | |
1365 | } | |
1366 | ||
42e9a92f RL |
1367 | op = fc_frame_payload_op(fp); |
1368 | if (op == ELS_LS_ACC) | |
1190d925 | 1369 | fc_lport_enter_disabled(lport); |
42e9a92f RL |
1370 | else |
1371 | fc_lport_error(lport, fp); | |
1372 | ||
1373 | out: | |
1374 | fc_frame_free(fp); | |
1375 | err: | |
1376 | mutex_unlock(&lport->lp_mutex); | |
1377 | } | |
11b56188 | 1378 | EXPORT_SYMBOL(fc_lport_logo_resp); |
42e9a92f RL |
1379 | |
1380 | /** | |
34f42a07 | 1381 | * fc_rport_enter_logo() - Logout of the fabric |
3a3b42bf | 1382 | * @lport: The local port to be logged out |
42e9a92f RL |
1383 | * |
1384 | * Locking Note: The lport lock is expected to be held before calling | |
1385 | * this routine. | |
1386 | */ | |
1387 | static void fc_lport_enter_logo(struct fc_lport *lport) | |
1388 | { | |
1389 | struct fc_frame *fp; | |
1390 | struct fc_els_logo *logo; | |
1391 | ||
7414705e RL |
1392 | FC_LPORT_DBG(lport, "Entered LOGO state from %s state\n", |
1393 | fc_lport_state(lport)); | |
42e9a92f RL |
1394 | |
1395 | fc_lport_state_enter(lport, LPORT_ST_LOGO); | |
8faecddb | 1396 | fc_vports_linkchange(lport); |
42e9a92f | 1397 | |
42e9a92f RL |
1398 | fp = fc_frame_alloc(lport, sizeof(*logo)); |
1399 | if (!fp) { | |
1400 | fc_lport_error(lport, fp); | |
1401 | return; | |
1402 | } | |
1403 | ||
a46f327a JE |
1404 | if (!lport->tt.elsct_send(lport, FC_FID_FLOGI, fp, ELS_LOGO, |
1405 | fc_lport_logo_resp, lport, lport->e_d_tov)) | |
8f550f93 | 1406 | fc_lport_error(lport, NULL); |
42e9a92f RL |
1407 | } |
1408 | ||
1409 | /** | |
34f42a07 | 1410 | * fc_lport_flogi_resp() - Handle response to FLOGI request |
3a3b42bf RL |
1411 | * @sp: The sequence that the FLOGI was on |
1412 | * @fp: The FLOGI response frame | |
1413 | * @lp_arg: The lport port that received the FLOGI response | |
42e9a92f RL |
1414 | * |
1415 | * Locking Note: This function will be called without the lport lock | |
3a3b42bf | 1416 | * held, but it will lock, call an _enter_* function or fc_lport_error() |
42e9a92f RL |
1417 | * and then unlock the lport. |
1418 | */ | |
11b56188 | 1419 | void fc_lport_flogi_resp(struct fc_seq *sp, struct fc_frame *fp, |
3a3b42bf | 1420 | void *lp_arg) |
42e9a92f RL |
1421 | { |
1422 | struct fc_lport *lport = lp_arg; | |
1423 | struct fc_frame_header *fh; | |
1424 | struct fc_els_flogi *flp; | |
1425 | u32 did; | |
1426 | u16 csp_flags; | |
1427 | unsigned int r_a_tov; | |
1428 | unsigned int e_d_tov; | |
1429 | u16 mfs; | |
1430 | ||
f657d299 JE |
1431 | FC_LPORT_DBG(lport, "Received a FLOGI %s\n", fc_els_resp_type(fp)); |
1432 | ||
42e9a92f RL |
1433 | if (fp == ERR_PTR(-FC_EX_CLOSED)) |
1434 | return; | |
1435 | ||
1436 | mutex_lock(&lport->lp_mutex); | |
1437 | ||
42e9a92f | 1438 | if (lport->state != LPORT_ST_FLOGI) { |
7414705e RL |
1439 | FC_LPORT_DBG(lport, "Received a FLOGI response, but in state " |
1440 | "%s\n", fc_lport_state(lport)); | |
76f6804e AJ |
1441 | if (IS_ERR(fp)) |
1442 | goto err; | |
42e9a92f RL |
1443 | goto out; |
1444 | } | |
1445 | ||
76f6804e AJ |
1446 | if (IS_ERR(fp)) { |
1447 | fc_lport_error(lport, fp); | |
1448 | goto err; | |
1449 | } | |
1450 | ||
42e9a92f RL |
1451 | fh = fc_frame_header_get(fp); |
1452 | did = ntoh24(fh->fh_d_id); | |
1453 | if (fc_frame_payload_op(fp) == ELS_LS_ACC && did != 0) { | |
42e9a92f RL |
1454 | flp = fc_frame_payload_get(fp, sizeof(*flp)); |
1455 | if (flp) { | |
1456 | mfs = ntohs(flp->fl_csp.sp_bb_data) & | |
1457 | FC_SP_BB_DATA_MASK; | |
1458 | if (mfs >= FC_SP_MIN_MAX_PAYLOAD && | |
1459 | mfs < lport->mfs) | |
1460 | lport->mfs = mfs; | |
1461 | csp_flags = ntohs(flp->fl_csp.sp_features); | |
1462 | r_a_tov = ntohl(flp->fl_csp.sp_r_a_tov); | |
1463 | e_d_tov = ntohl(flp->fl_csp.sp_e_d_tov); | |
1464 | if (csp_flags & FC_SP_FT_EDTR) | |
1465 | e_d_tov /= 1000000; | |
db36c06c CL |
1466 | |
1467 | lport->npiv_enabled = !!(csp_flags & FC_SP_FT_NPIV_ACC); | |
1468 | ||
42e9a92f RL |
1469 | if ((csp_flags & FC_SP_FT_FPORT) == 0) { |
1470 | if (e_d_tov > lport->e_d_tov) | |
1471 | lport->e_d_tov = e_d_tov; | |
1472 | lport->r_a_tov = 2 * e_d_tov; | |
093bb6a2 | 1473 | fc_lport_set_port_id(lport, did, fp); |
7414705e RL |
1474 | printk(KERN_INFO "libfc: Port (%6x) entered " |
1475 | "point to point mode\n", did); | |
42e9a92f RL |
1476 | fc_lport_ptp_setup(lport, ntoh24(fh->fh_s_id), |
1477 | get_unaligned_be64( | |
1478 | &flp->fl_wwpn), | |
1479 | get_unaligned_be64( | |
1480 | &flp->fl_wwnn)); | |
1481 | } else { | |
1482 | lport->e_d_tov = e_d_tov; | |
1483 | lport->r_a_tov = r_a_tov; | |
1484 | fc_host_fabric_name(lport->host) = | |
1485 | get_unaligned_be64(&flp->fl_wwnn); | |
093bb6a2 | 1486 | fc_lport_set_port_id(lport, did, fp); |
42e9a92f RL |
1487 | fc_lport_enter_dns(lport); |
1488 | } | |
1489 | } | |
42e9a92f | 1490 | } else { |
7414705e | 1491 | FC_LPORT_DBG(lport, "Bad FLOGI response\n"); |
42e9a92f RL |
1492 | } |
1493 | ||
1494 | out: | |
1495 | fc_frame_free(fp); | |
1496 | err: | |
1497 | mutex_unlock(&lport->lp_mutex); | |
1498 | } | |
11b56188 | 1499 | EXPORT_SYMBOL(fc_lport_flogi_resp); |
42e9a92f RL |
1500 | |
1501 | /** | |
34f42a07 | 1502 | * fc_rport_enter_flogi() - Send a FLOGI request to the fabric manager |
42e9a92f RL |
1503 | * @lport: Fibre Channel local port to be logged in to the fabric |
1504 | * | |
1505 | * Locking Note: The lport lock is expected to be held before calling | |
1506 | * this routine. | |
1507 | */ | |
1508 | void fc_lport_enter_flogi(struct fc_lport *lport) | |
1509 | { | |
1510 | struct fc_frame *fp; | |
1511 | ||
7414705e RL |
1512 | FC_LPORT_DBG(lport, "Entered FLOGI state from %s state\n", |
1513 | fc_lport_state(lport)); | |
42e9a92f RL |
1514 | |
1515 | fc_lport_state_enter(lport, LPORT_ST_FLOGI); | |
1516 | ||
1517 | fp = fc_frame_alloc(lport, sizeof(struct fc_els_flogi)); | |
1518 | if (!fp) | |
1519 | return fc_lport_error(lport, fp); | |
1520 | ||
db36c06c CL |
1521 | if (!lport->tt.elsct_send(lport, FC_FID_FLOGI, fp, |
1522 | lport->vport ? ELS_FDISC : ELS_FLOGI, | |
42e9a92f | 1523 | fc_lport_flogi_resp, lport, lport->e_d_tov)) |
8f550f93 | 1524 | fc_lport_error(lport, NULL); |
42e9a92f RL |
1525 | } |
1526 | ||
3a3b42bf RL |
1527 | /** |
1528 | * fc_lport_config() - Configure a fc_lport | |
1529 | * @lport: The local port to be configured | |
1530 | */ | |
42e9a92f RL |
1531 | int fc_lport_config(struct fc_lport *lport) |
1532 | { | |
1533 | INIT_DELAYED_WORK(&lport->retry_work, fc_lport_timeout); | |
1534 | mutex_init(&lport->lp_mutex); | |
1535 | ||
b1d9fd55 | 1536 | fc_lport_state_enter(lport, LPORT_ST_DISABLED); |
42e9a92f RL |
1537 | |
1538 | fc_lport_add_fc4_type(lport, FC_TYPE_FCP); | |
1539 | fc_lport_add_fc4_type(lport, FC_TYPE_CT); | |
1540 | ||
1541 | return 0; | |
1542 | } | |
1543 | EXPORT_SYMBOL(fc_lport_config); | |
1544 | ||
3a3b42bf RL |
1545 | /** |
1546 | * fc_lport_init() - Initialize the lport layer for a local port | |
1547 | * @lport: The local port to initialize the exchange layer for | |
1548 | */ | |
42e9a92f RL |
1549 | int fc_lport_init(struct fc_lport *lport) |
1550 | { | |
1551 | if (!lport->tt.lport_recv) | |
1552 | lport->tt.lport_recv = fc_lport_recv_req; | |
1553 | ||
1554 | if (!lport->tt.lport_reset) | |
1555 | lport->tt.lport_reset = fc_lport_reset; | |
1556 | ||
1557 | fc_host_port_type(lport->host) = FC_PORTTYPE_NPORT; | |
1558 | fc_host_node_name(lport->host) = lport->wwnn; | |
1559 | fc_host_port_name(lport->host) = lport->wwpn; | |
1560 | fc_host_supported_classes(lport->host) = FC_COS_CLASS3; | |
1561 | memset(fc_host_supported_fc4s(lport->host), 0, | |
1562 | sizeof(fc_host_supported_fc4s(lport->host))); | |
1563 | fc_host_supported_fc4s(lport->host)[2] = 1; | |
1564 | fc_host_supported_fc4s(lport->host)[7] = 1; | |
1565 | ||
1566 | /* This value is also unchanging */ | |
1567 | memset(fc_host_active_fc4s(lport->host), 0, | |
1568 | sizeof(fc_host_active_fc4s(lport->host))); | |
1569 | fc_host_active_fc4s(lport->host)[2] = 1; | |
1570 | fc_host_active_fc4s(lport->host)[7] = 1; | |
1571 | fc_host_maxframe_size(lport->host) = lport->mfs; | |
1572 | fc_host_supported_speeds(lport->host) = 0; | |
1573 | if (lport->link_supported_speeds & FC_PORTSPEED_1GBIT) | |
1574 | fc_host_supported_speeds(lport->host) |= FC_PORTSPEED_1GBIT; | |
1575 | if (lport->link_supported_speeds & FC_PORTSPEED_10GBIT) | |
1576 | fc_host_supported_speeds(lport->host) |= FC_PORTSPEED_10GBIT; | |
1577 | ||
1578 | return 0; | |
1579 | } | |
1580 | EXPORT_SYMBOL(fc_lport_init); | |
a51ab396 SM |
1581 | |
1582 | /** | |
3a3b42bf RL |
1583 | * fc_lport_bsg_resp() - The common response handler for FC Passthrough requests |
1584 | * @sp: The sequence for the FC Passthrough response | |
1585 | * @fp: The response frame | |
1586 | * @info_arg: The BSG info that the response is for | |
a51ab396 SM |
1587 | */ |
1588 | static void fc_lport_bsg_resp(struct fc_seq *sp, struct fc_frame *fp, | |
1589 | void *info_arg) | |
1590 | { | |
1591 | struct fc_bsg_info *info = info_arg; | |
1592 | struct fc_bsg_job *job = info->job; | |
1593 | struct fc_lport *lport = info->lport; | |
1594 | struct fc_frame_header *fh; | |
1595 | size_t len; | |
1596 | void *buf; | |
1597 | ||
1598 | if (IS_ERR(fp)) { | |
1599 | job->reply->result = (PTR_ERR(fp) == -FC_EX_CLOSED) ? | |
1600 | -ECONNABORTED : -ETIMEDOUT; | |
1601 | job->reply_len = sizeof(uint32_t); | |
1602 | job->state_flags |= FC_RQST_STATE_DONE; | |
1603 | job->job_done(job); | |
1604 | kfree(info); | |
1605 | return; | |
1606 | } | |
1607 | ||
1608 | mutex_lock(&lport->lp_mutex); | |
1609 | fh = fc_frame_header_get(fp); | |
1610 | len = fr_len(fp) - sizeof(*fh); | |
1611 | buf = fc_frame_payload_get(fp, 0); | |
1612 | ||
1613 | if (fr_sof(fp) == FC_SOF_I3 && !ntohs(fh->fh_seq_cnt)) { | |
1614 | /* Get the response code from the first frame payload */ | |
1615 | unsigned short cmd = (info->rsp_code == FC_FS_ACC) ? | |
1616 | ntohs(((struct fc_ct_hdr *)buf)->ct_cmd) : | |
1617 | (unsigned short)fc_frame_payload_op(fp); | |
1618 | ||
1619 | /* Save the reply status of the job */ | |
1620 | job->reply->reply_data.ctels_reply.status = | |
1621 | (cmd == info->rsp_code) ? | |
1622 | FC_CTELS_STATUS_OK : FC_CTELS_STATUS_REJECT; | |
1623 | } | |
1624 | ||
1625 | job->reply->reply_payload_rcv_len += | |
1626 | fc_copy_buffer_to_sglist(buf, len, info->sg, &info->nents, | |
1627 | &info->offset, KM_BIO_SRC_IRQ, NULL); | |
1628 | ||
1629 | if (fr_eof(fp) == FC_EOF_T && | |
1630 | (ntoh24(fh->fh_f_ctl) & (FC_FC_LAST_SEQ | FC_FC_END_SEQ)) == | |
1631 | (FC_FC_LAST_SEQ | FC_FC_END_SEQ)) { | |
1632 | if (job->reply->reply_payload_rcv_len > | |
1633 | job->reply_payload.payload_len) | |
1634 | job->reply->reply_payload_rcv_len = | |
1635 | job->reply_payload.payload_len; | |
1636 | job->reply->result = 0; | |
1637 | job->state_flags |= FC_RQST_STATE_DONE; | |
1638 | job->job_done(job); | |
1639 | kfree(info); | |
1640 | } | |
1641 | fc_frame_free(fp); | |
1642 | mutex_unlock(&lport->lp_mutex); | |
1643 | } | |
1644 | ||
1645 | /** | |
3a3b42bf RL |
1646 | * fc_lport_els_request() - Send ELS passthrough request |
1647 | * @job: The BSG Passthrough job | |
a51ab396 | 1648 | * @lport: The local port sending the request |
3a3b42bf | 1649 | * @did: The destination port id |
a51ab396 SM |
1650 | * |
1651 | * Locking Note: The lport lock is expected to be held before calling | |
1652 | * this routine. | |
1653 | */ | |
1654 | static int fc_lport_els_request(struct fc_bsg_job *job, | |
1655 | struct fc_lport *lport, | |
1656 | u32 did, u32 tov) | |
1657 | { | |
1658 | struct fc_bsg_info *info; | |
1659 | struct fc_frame *fp; | |
1660 | struct fc_frame_header *fh; | |
1661 | char *pp; | |
1662 | int len; | |
1663 | ||
1664 | fp = fc_frame_alloc(lport, sizeof(struct fc_frame_header) + | |
1665 | job->request_payload.payload_len); | |
1666 | if (!fp) | |
1667 | return -ENOMEM; | |
1668 | ||
1669 | len = job->request_payload.payload_len; | |
1670 | pp = fc_frame_payload_get(fp, len); | |
1671 | ||
1672 | sg_copy_to_buffer(job->request_payload.sg_list, | |
1673 | job->request_payload.sg_cnt, | |
1674 | pp, len); | |
1675 | ||
1676 | fh = fc_frame_header_get(fp); | |
1677 | fh->fh_r_ctl = FC_RCTL_ELS_REQ; | |
1678 | hton24(fh->fh_d_id, did); | |
1679 | hton24(fh->fh_s_id, fc_host_port_id(lport->host)); | |
1680 | fh->fh_type = FC_TYPE_ELS; | |
1681 | hton24(fh->fh_f_ctl, FC_FC_FIRST_SEQ | | |
1682 | FC_FC_END_SEQ | FC_FC_SEQ_INIT); | |
1683 | fh->fh_cs_ctl = 0; | |
1684 | fh->fh_df_ctl = 0; | |
1685 | fh->fh_parm_offset = 0; | |
1686 | ||
1687 | info = kzalloc(sizeof(struct fc_bsg_info), GFP_KERNEL); | |
1688 | if (!info) { | |
1689 | fc_frame_free(fp); | |
1690 | return -ENOMEM; | |
1691 | } | |
1692 | ||
1693 | info->job = job; | |
1694 | info->lport = lport; | |
1695 | info->rsp_code = ELS_LS_ACC; | |
1696 | info->nents = job->reply_payload.sg_cnt; | |
1697 | info->sg = job->reply_payload.sg_list; | |
1698 | ||
1699 | if (!lport->tt.exch_seq_send(lport, fp, fc_lport_bsg_resp, | |
1700 | NULL, info, tov)) | |
1701 | return -ECOMM; | |
1702 | return 0; | |
1703 | } | |
1704 | ||
1705 | /** | |
3a3b42bf RL |
1706 | * fc_lport_ct_request() - Send CT Passthrough request |
1707 | * @job: The BSG Passthrough job | |
a51ab396 SM |
1708 | * @lport: The local port sending the request |
1709 | * @did: The destination FC-ID | |
3a3b42bf | 1710 | * @tov: The timeout period to wait for the response |
a51ab396 SM |
1711 | * |
1712 | * Locking Note: The lport lock is expected to be held before calling | |
1713 | * this routine. | |
1714 | */ | |
1715 | static int fc_lport_ct_request(struct fc_bsg_job *job, | |
1716 | struct fc_lport *lport, u32 did, u32 tov) | |
1717 | { | |
1718 | struct fc_bsg_info *info; | |
1719 | struct fc_frame *fp; | |
1720 | struct fc_frame_header *fh; | |
1721 | struct fc_ct_req *ct; | |
1722 | size_t len; | |
1723 | ||
1724 | fp = fc_frame_alloc(lport, sizeof(struct fc_ct_hdr) + | |
1725 | job->request_payload.payload_len); | |
1726 | if (!fp) | |
1727 | return -ENOMEM; | |
1728 | ||
1729 | len = job->request_payload.payload_len; | |
1730 | ct = fc_frame_payload_get(fp, len); | |
1731 | ||
1732 | sg_copy_to_buffer(job->request_payload.sg_list, | |
1733 | job->request_payload.sg_cnt, | |
1734 | ct, len); | |
1735 | ||
1736 | fh = fc_frame_header_get(fp); | |
1737 | fh->fh_r_ctl = FC_RCTL_DD_UNSOL_CTL; | |
1738 | hton24(fh->fh_d_id, did); | |
1739 | hton24(fh->fh_s_id, fc_host_port_id(lport->host)); | |
1740 | fh->fh_type = FC_TYPE_CT; | |
1741 | hton24(fh->fh_f_ctl, FC_FC_FIRST_SEQ | | |
1742 | FC_FC_END_SEQ | FC_FC_SEQ_INIT); | |
1743 | fh->fh_cs_ctl = 0; | |
1744 | fh->fh_df_ctl = 0; | |
1745 | fh->fh_parm_offset = 0; | |
1746 | ||
1747 | info = kzalloc(sizeof(struct fc_bsg_info), GFP_KERNEL); | |
1748 | if (!info) { | |
1749 | fc_frame_free(fp); | |
1750 | return -ENOMEM; | |
1751 | } | |
1752 | ||
1753 | info->job = job; | |
1754 | info->lport = lport; | |
1755 | info->rsp_code = FC_FS_ACC; | |
1756 | info->nents = job->reply_payload.sg_cnt; | |
1757 | info->sg = job->reply_payload.sg_list; | |
1758 | ||
1759 | if (!lport->tt.exch_seq_send(lport, fp, fc_lport_bsg_resp, | |
1760 | NULL, info, tov)) | |
1761 | return -ECOMM; | |
1762 | return 0; | |
1763 | } | |
1764 | ||
1765 | /** | |
1766 | * fc_lport_bsg_request() - The common entry point for sending | |
3a3b42bf RL |
1767 | * FC Passthrough requests |
1768 | * @job: The BSG passthrough job | |
a51ab396 SM |
1769 | */ |
1770 | int fc_lport_bsg_request(struct fc_bsg_job *job) | |
1771 | { | |
1772 | struct request *rsp = job->req->next_rq; | |
1773 | struct Scsi_Host *shost = job->shost; | |
1774 | struct fc_lport *lport = shost_priv(shost); | |
1775 | struct fc_rport *rport; | |
1776 | struct fc_rport_priv *rdata; | |
1777 | int rc = -EINVAL; | |
1778 | u32 did; | |
1779 | ||
1780 | job->reply->reply_payload_rcv_len = 0; | |
1781 | rsp->resid_len = job->reply_payload.payload_len; | |
1782 | ||
1783 | mutex_lock(&lport->lp_mutex); | |
1784 | ||
1785 | switch (job->request->msgcode) { | |
1786 | case FC_BSG_RPT_ELS: | |
1787 | rport = job->rport; | |
1788 | if (!rport) | |
1789 | break; | |
1790 | ||
1791 | rdata = rport->dd_data; | |
1792 | rc = fc_lport_els_request(job, lport, rport->port_id, | |
1793 | rdata->e_d_tov); | |
1794 | break; | |
1795 | ||
1796 | case FC_BSG_RPT_CT: | |
1797 | rport = job->rport; | |
1798 | if (!rport) | |
1799 | break; | |
1800 | ||
1801 | rdata = rport->dd_data; | |
1802 | rc = fc_lport_ct_request(job, lport, rport->port_id, | |
1803 | rdata->e_d_tov); | |
1804 | break; | |
1805 | ||
1806 | case FC_BSG_HST_CT: | |
1807 | did = ntoh24(job->request->rqst_data.h_ct.port_id); | |
1808 | if (did == FC_FID_DIR_SERV) | |
3a3b42bf | 1809 | rdata = lport->dns_rdata; |
a51ab396 SM |
1810 | else |
1811 | rdata = lport->tt.rport_lookup(lport, did); | |
1812 | ||
1813 | if (!rdata) | |
1814 | break; | |
1815 | ||
1816 | rc = fc_lport_ct_request(job, lport, did, rdata->e_d_tov); | |
1817 | break; | |
1818 | ||
1819 | case FC_BSG_HST_ELS_NOLOGIN: | |
1820 | did = ntoh24(job->request->rqst_data.h_els.port_id); | |
1821 | rc = fc_lport_els_request(job, lport, did, lport->e_d_tov); | |
1822 | break; | |
1823 | } | |
1824 | ||
1825 | mutex_unlock(&lport->lp_mutex); | |
1826 | return rc; | |
1827 | } | |
1828 | EXPORT_SYMBOL(fc_lport_bsg_request); |