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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 | |
af901ca1 | 59 | * notification. Currently, successful discovery causes the lport to take no |
42e9a92f RL |
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> | |
5a0e3ad6 | 91 | #include <linux/slab.h> |
42e9a92f RL |
92 | #include <asm/unaligned.h> |
93 | ||
94 | #include <scsi/fc/fc_gs.h> | |
95 | ||
96 | #include <scsi/libfc.h> | |
97 | #include <scsi/fc_encode.h> | |
a51ab396 | 98 | #include <linux/scatterlist.h> |
42e9a92f | 99 | |
8866a5d9 RL |
100 | #include "fc_libfc.h" |
101 | ||
42e9a92f RL |
102 | /* Fabric IDs to use for point-to-point mode, chosen on whims. */ |
103 | #define FC_LOCAL_PTP_FID_LO 0x010101 | |
104 | #define FC_LOCAL_PTP_FID_HI 0x010102 | |
105 | ||
106 | #define DNS_DELAY 3 /* Discovery delay after RSCN (in seconds)*/ | |
107 | ||
42e9a92f RL |
108 | static void fc_lport_error(struct fc_lport *, struct fc_frame *); |
109 | ||
110 | static void fc_lport_enter_reset(struct fc_lport *); | |
111 | static void fc_lport_enter_flogi(struct fc_lport *); | |
112 | static void fc_lport_enter_dns(struct fc_lport *); | |
c914f7d1 | 113 | static void fc_lport_enter_ns(struct fc_lport *, enum fc_lport_state); |
42e9a92f RL |
114 | static void fc_lport_enter_scr(struct fc_lport *); |
115 | static void fc_lport_enter_ready(struct fc_lport *); | |
116 | static void fc_lport_enter_logo(struct fc_lport *); | |
117 | ||
118 | static const char *fc_lport_state_names[] = { | |
b1d9fd55 | 119 | [LPORT_ST_DISABLED] = "disabled", |
42e9a92f RL |
120 | [LPORT_ST_FLOGI] = "FLOGI", |
121 | [LPORT_ST_DNS] = "dNS", | |
c9c7bd7a | 122 | [LPORT_ST_RNN_ID] = "RNN_ID", |
5baa17c3 | 123 | [LPORT_ST_RSNN_NN] = "RSNN_NN", |
c9866a54 | 124 | [LPORT_ST_RSPN_ID] = "RSPN_ID", |
42e9a92f | 125 | [LPORT_ST_RFT_ID] = "RFT_ID", |
ab593b18 | 126 | [LPORT_ST_RFF_ID] = "RFF_ID", |
42e9a92f RL |
127 | [LPORT_ST_SCR] = "SCR", |
128 | [LPORT_ST_READY] = "Ready", | |
129 | [LPORT_ST_LOGO] = "LOGO", | |
130 | [LPORT_ST_RESET] = "reset", | |
131 | }; | |
132 | ||
a51ab396 SM |
133 | /** |
134 | * struct fc_bsg_info - FC Passthrough managemet structure | |
135 | * @job: The passthrough job | |
136 | * @lport: The local port to pass through a command | |
137 | * @rsp_code: The expected response code | |
3a3b42bf | 138 | * @sg: job->reply_payload.sg_list |
a51ab396 SM |
139 | * @nents: job->reply_payload.sg_cnt |
140 | * @offset: The offset into the response data | |
141 | */ | |
142 | struct fc_bsg_info { | |
143 | struct fc_bsg_job *job; | |
144 | struct fc_lport *lport; | |
145 | u16 rsp_code; | |
146 | struct scatterlist *sg; | |
147 | u32 nents; | |
148 | size_t offset; | |
149 | }; | |
150 | ||
3a3b42bf RL |
151 | /** |
152 | * fc_frame_drop() - Dummy frame handler | |
153 | * @lport: The local port the frame was received on | |
154 | * @fp: The received frame | |
155 | */ | |
42e9a92f RL |
156 | static int fc_frame_drop(struct fc_lport *lport, struct fc_frame *fp) |
157 | { | |
158 | fc_frame_free(fp); | |
159 | return 0; | |
160 | } | |
161 | ||
162 | /** | |
34f42a07 | 163 | * fc_lport_rport_callback() - Event handler for rport events |
42e9a92f | 164 | * @lport: The lport which is receiving the event |
9fb9d328 | 165 | * @rdata: private remote port data |
42e9a92f RL |
166 | * @event: The event that occured |
167 | * | |
168 | * Locking Note: The rport lock should not be held when calling | |
169 | * this function. | |
170 | */ | |
171 | static void fc_lport_rport_callback(struct fc_lport *lport, | |
9fb9d328 | 172 | struct fc_rport_priv *rdata, |
42e9a92f RL |
173 | enum fc_rport_event event) |
174 | { | |
ce8b5df0 | 175 | FC_LPORT_DBG(lport, "Received a %d event for port (%6.6x)\n", event, |
f211fa51 | 176 | rdata->ids.port_id); |
42e9a92f | 177 | |
b5cbf083 | 178 | mutex_lock(&lport->lp_mutex); |
42e9a92f | 179 | switch (event) { |
4c0f62b5 | 180 | case RPORT_EV_READY: |
b5cbf083 | 181 | if (lport->state == LPORT_ST_DNS) { |
3a3b42bf | 182 | lport->dns_rdata = rdata; |
c914f7d1 | 183 | fc_lport_enter_ns(lport, LPORT_ST_RNN_ID); |
b5cbf083 JE |
184 | } else { |
185 | FC_LPORT_DBG(lport, "Received an READY event " | |
ce8b5df0 | 186 | "on port (%6.6x) for the directory " |
b5cbf083 JE |
187 | "server, but the lport is not " |
188 | "in the DNS state, it's in the " | |
189 | "%d state", rdata->ids.port_id, | |
190 | lport->state); | |
191 | lport->tt.rport_logoff(rdata); | |
192 | } | |
42e9a92f RL |
193 | break; |
194 | case RPORT_EV_LOGO: | |
195 | case RPORT_EV_FAILED: | |
196 | case RPORT_EV_STOP: | |
3a3b42bf | 197 | lport->dns_rdata = NULL; |
42e9a92f RL |
198 | break; |
199 | case RPORT_EV_NONE: | |
200 | break; | |
201 | } | |
b5cbf083 | 202 | mutex_unlock(&lport->lp_mutex); |
42e9a92f RL |
203 | } |
204 | ||
205 | /** | |
34f42a07 | 206 | * fc_lport_state() - Return a string which represents the lport's state |
42e9a92f RL |
207 | * @lport: The lport whose state is to converted to a string |
208 | */ | |
209 | static const char *fc_lport_state(struct fc_lport *lport) | |
210 | { | |
211 | const char *cp; | |
212 | ||
213 | cp = fc_lport_state_names[lport->state]; | |
214 | if (!cp) | |
215 | cp = "unknown"; | |
216 | return cp; | |
217 | } | |
218 | ||
219 | /** | |
34f42a07 | 220 | * fc_lport_ptp_setup() - Create an rport for point-to-point mode |
3a3b42bf RL |
221 | * @lport: The lport to attach the ptp rport to |
222 | * @remote_fid: The FID of the ptp rport | |
42e9a92f RL |
223 | * @remote_wwpn: The WWPN of the ptp rport |
224 | * @remote_wwnn: The WWNN of the ptp rport | |
225 | */ | |
226 | static void fc_lport_ptp_setup(struct fc_lport *lport, | |
227 | u32 remote_fid, u64 remote_wwpn, | |
228 | u64 remote_wwnn) | |
229 | { | |
48f00902 | 230 | mutex_lock(&lport->disc.disc_mutex); |
2f2ac4a0 | 231 | if (lport->ptp_rdata) { |
3a3b42bf | 232 | lport->tt.rport_logoff(lport->ptp_rdata); |
2f2ac4a0 JE |
233 | kref_put(&lport->ptp_rdata->kref, lport->tt.rport_destroy); |
234 | } | |
3a3b42bf | 235 | lport->ptp_rdata = lport->tt.rport_create(lport, remote_fid); |
2f2ac4a0 | 236 | kref_get(&lport->ptp_rdata->kref); |
3a3b42bf RL |
237 | lport->ptp_rdata->ids.port_name = remote_wwpn; |
238 | lport->ptp_rdata->ids.node_name = remote_wwnn; | |
48f00902 | 239 | mutex_unlock(&lport->disc.disc_mutex); |
42e9a92f | 240 | |
3a3b42bf | 241 | lport->tt.rport_login(lport->ptp_rdata); |
42e9a92f RL |
242 | |
243 | fc_lport_enter_ready(lport); | |
244 | } | |
245 | ||
3a3b42bf RL |
246 | /** |
247 | * fc_get_host_port_type() - Return the port type of the given Scsi_Host | |
248 | * @shost: The SCSI host whose port type is to be determined | |
249 | */ | |
42e9a92f RL |
250 | void fc_get_host_port_type(struct Scsi_Host *shost) |
251 | { | |
252 | /* TODO - currently just NPORT */ | |
253 | fc_host_port_type(shost) = FC_PORTTYPE_NPORT; | |
254 | } | |
255 | EXPORT_SYMBOL(fc_get_host_port_type); | |
256 | ||
3a3b42bf RL |
257 | /** |
258 | * fc_get_host_port_state() - Return the port state of the given Scsi_Host | |
259 | * @shost: The SCSI host whose port state is to be determined | |
260 | */ | |
42e9a92f RL |
261 | void fc_get_host_port_state(struct Scsi_Host *shost) |
262 | { | |
3a3b42bf | 263 | struct fc_lport *lport = shost_priv(shost); |
42e9a92f | 264 | |
3a3b42bf RL |
265 | mutex_lock(&lport->lp_mutex); |
266 | if (!lport->link_up) | |
8faecddb | 267 | fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN; |
42e9a92f | 268 | else |
3a3b42bf | 269 | switch (lport->state) { |
8faecddb CL |
270 | case LPORT_ST_READY: |
271 | fc_host_port_state(shost) = FC_PORTSTATE_ONLINE; | |
272 | break; | |
273 | default: | |
274 | fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE; | |
275 | } | |
3a3b42bf | 276 | mutex_unlock(&lport->lp_mutex); |
42e9a92f RL |
277 | } |
278 | EXPORT_SYMBOL(fc_get_host_port_state); | |
279 | ||
3a3b42bf RL |
280 | /** |
281 | * fc_get_host_speed() - Return the speed of the given Scsi_Host | |
282 | * @shost: The SCSI host whose port speed is to be determined | |
283 | */ | |
42e9a92f RL |
284 | void fc_get_host_speed(struct Scsi_Host *shost) |
285 | { | |
286 | struct fc_lport *lport = shost_priv(shost); | |
287 | ||
288 | fc_host_speed(shost) = lport->link_speed; | |
289 | } | |
290 | EXPORT_SYMBOL(fc_get_host_speed); | |
291 | ||
3a3b42bf RL |
292 | /** |
293 | * fc_get_host_stats() - Return the Scsi_Host's statistics | |
294 | * @shost: The SCSI host whose statistics are to be returned | |
295 | */ | |
42e9a92f RL |
296 | struct fc_host_statistics *fc_get_host_stats(struct Scsi_Host *shost) |
297 | { | |
42e9a92f | 298 | struct fc_host_statistics *fcoe_stats; |
3a3b42bf | 299 | struct fc_lport *lport = shost_priv(shost); |
42e9a92f | 300 | struct timespec v0, v1; |
582b45bc | 301 | unsigned int cpu; |
42e9a92f | 302 | |
3a3b42bf | 303 | fcoe_stats = &lport->host_stats; |
42e9a92f RL |
304 | memset(fcoe_stats, 0, sizeof(struct fc_host_statistics)); |
305 | ||
306 | jiffies_to_timespec(jiffies, &v0); | |
3a3b42bf | 307 | jiffies_to_timespec(lport->boot_time, &v1); |
42e9a92f RL |
308 | fcoe_stats->seconds_since_last_reset = (v0.tv_sec - v1.tv_sec); |
309 | ||
582b45bc RL |
310 | for_each_possible_cpu(cpu) { |
311 | struct fcoe_dev_stats *stats; | |
312 | ||
3a3b42bf | 313 | stats = per_cpu_ptr(lport->dev_stats, cpu); |
582b45bc | 314 | |
42e9a92f RL |
315 | fcoe_stats->tx_frames += stats->TxFrames; |
316 | fcoe_stats->tx_words += stats->TxWords; | |
317 | fcoe_stats->rx_frames += stats->RxFrames; | |
318 | fcoe_stats->rx_words += stats->RxWords; | |
319 | fcoe_stats->error_frames += stats->ErrorFrames; | |
320 | fcoe_stats->invalid_crc_count += stats->InvalidCRCCount; | |
321 | fcoe_stats->fcp_input_requests += stats->InputRequests; | |
322 | fcoe_stats->fcp_output_requests += stats->OutputRequests; | |
323 | fcoe_stats->fcp_control_requests += stats->ControlRequests; | |
324 | fcoe_stats->fcp_input_megabytes += stats->InputMegabytes; | |
325 | fcoe_stats->fcp_output_megabytes += stats->OutputMegabytes; | |
326 | fcoe_stats->link_failure_count += stats->LinkFailureCount; | |
327 | } | |
328 | fcoe_stats->lip_count = -1; | |
329 | fcoe_stats->nos_count = -1; | |
330 | fcoe_stats->loss_of_sync_count = -1; | |
331 | fcoe_stats->loss_of_signal_count = -1; | |
332 | fcoe_stats->prim_seq_protocol_err_count = -1; | |
333 | fcoe_stats->dumped_frames = -1; | |
334 | return fcoe_stats; | |
335 | } | |
336 | EXPORT_SYMBOL(fc_get_host_stats); | |
337 | ||
3a3b42bf RL |
338 | /** |
339 | * fc_lport_flogi_fill() - Fill in FLOGI command for request | |
340 | * @lport: The local port the FLOGI is for | |
341 | * @flogi: The FLOGI command | |
342 | * @op: The opcode | |
42e9a92f | 343 | */ |
3a3b42bf RL |
344 | static void fc_lport_flogi_fill(struct fc_lport *lport, |
345 | struct fc_els_flogi *flogi, | |
346 | unsigned int op) | |
42e9a92f RL |
347 | { |
348 | struct fc_els_csp *sp; | |
349 | struct fc_els_cssp *cp; | |
350 | ||
351 | memset(flogi, 0, sizeof(*flogi)); | |
352 | flogi->fl_cmd = (u8) op; | |
353 | put_unaligned_be64(lport->wwpn, &flogi->fl_wwpn); | |
354 | put_unaligned_be64(lport->wwnn, &flogi->fl_wwnn); | |
355 | sp = &flogi->fl_csp; | |
356 | sp->sp_hi_ver = 0x20; | |
357 | sp->sp_lo_ver = 0x20; | |
358 | sp->sp_bb_cred = htons(10); /* this gets set by gateway */ | |
359 | sp->sp_bb_data = htons((u16) lport->mfs); | |
360 | cp = &flogi->fl_cssp[3 - 1]; /* class 3 parameters */ | |
361 | cp->cp_class = htons(FC_CPC_VALID | FC_CPC_SEQ); | |
362 | if (op != ELS_FLOGI) { | |
363 | sp->sp_features = htons(FC_SP_FT_CIRO); | |
364 | sp->sp_tot_seq = htons(255); /* seq. we accept */ | |
365 | sp->sp_rel_off = htons(0x1f); | |
366 | sp->sp_e_d_tov = htonl(lport->e_d_tov); | |
367 | ||
368 | cp->cp_rdfs = htons((u16) lport->mfs); | |
369 | cp->cp_con_seq = htons(255); | |
370 | cp->cp_open_seq = 1; | |
371 | } | |
372 | } | |
373 | ||
3a3b42bf RL |
374 | /** |
375 | * fc_lport_add_fc4_type() - Add a supported FC-4 type to a local port | |
376 | * @lport: The local port to add a new FC-4 type to | |
377 | * @type: The new FC-4 type | |
42e9a92f RL |
378 | */ |
379 | static void fc_lport_add_fc4_type(struct fc_lport *lport, enum fc_fh_type type) | |
380 | { | |
381 | __be32 *mp; | |
382 | ||
383 | mp = &lport->fcts.ff_type_map[type / FC_NS_BPW]; | |
384 | *mp = htonl(ntohl(*mp) | 1UL << (type % FC_NS_BPW)); | |
385 | } | |
386 | ||
387 | /** | |
34f42a07 | 388 | * fc_lport_recv_rlir_req() - Handle received Registered Link Incident Report. |
3a3b42bf RL |
389 | * @sp: The sequence in the RLIR exchange |
390 | * @fp: The RLIR request frame | |
42e9a92f | 391 | * @lport: Fibre Channel local port recieving the RLIR |
42e9a92f | 392 | * |
1b69bc06 | 393 | * Locking Note: The lport lock is expected to be held before calling |
42e9a92f RL |
394 | * this function. |
395 | */ | |
396 | static void fc_lport_recv_rlir_req(struct fc_seq *sp, struct fc_frame *fp, | |
397 | struct fc_lport *lport) | |
398 | { | |
7414705e RL |
399 | FC_LPORT_DBG(lport, "Received RLIR request while in state %s\n", |
400 | fc_lport_state(lport)); | |
42e9a92f RL |
401 | |
402 | lport->tt.seq_els_rsp_send(sp, ELS_LS_ACC, NULL); | |
403 | fc_frame_free(fp); | |
404 | } | |
405 | ||
406 | /** | |
34f42a07 | 407 | * fc_lport_recv_echo_req() - Handle received ECHO request |
3a3b42bf RL |
408 | * @sp: The sequence in the ECHO exchange |
409 | * @fp: ECHO request frame | |
410 | * @lport: The local port recieving the ECHO | |
42e9a92f | 411 | * |
1b69bc06 | 412 | * Locking Note: The lport lock is expected to be held before calling |
42e9a92f RL |
413 | * this function. |
414 | */ | |
415 | static void fc_lport_recv_echo_req(struct fc_seq *sp, struct fc_frame *in_fp, | |
416 | struct fc_lport *lport) | |
417 | { | |
418 | struct fc_frame *fp; | |
419 | struct fc_exch *ep = fc_seq_exch(sp); | |
420 | unsigned int len; | |
421 | void *pp; | |
422 | void *dp; | |
423 | u32 f_ctl; | |
424 | ||
1b69bc06 | 425 | FC_LPORT_DBG(lport, "Received ECHO request while in state %s\n", |
7414705e | 426 | fc_lport_state(lport)); |
42e9a92f RL |
427 | |
428 | len = fr_len(in_fp) - sizeof(struct fc_frame_header); | |
429 | pp = fc_frame_payload_get(in_fp, len); | |
430 | ||
431 | if (len < sizeof(__be32)) | |
432 | len = sizeof(__be32); | |
433 | ||
434 | fp = fc_frame_alloc(lport, len); | |
435 | if (fp) { | |
436 | dp = fc_frame_payload_get(fp, len); | |
437 | memcpy(dp, pp, len); | |
1b69bc06 | 438 | *((__be32 *)dp) = htonl(ELS_LS_ACC << 24); |
42e9a92f RL |
439 | sp = lport->tt.seq_start_next(sp); |
440 | f_ctl = FC_FC_EX_CTX | FC_FC_LAST_SEQ | FC_FC_END_SEQ; | |
441 | fc_fill_fc_hdr(fp, FC_RCTL_ELS_REP, ep->did, ep->sid, | |
442 | FC_TYPE_ELS, f_ctl, 0); | |
443 | lport->tt.seq_send(lport, sp, fp); | |
444 | } | |
445 | fc_frame_free(in_fp); | |
446 | } | |
447 | ||
448 | /** | |
1b69bc06 JE |
449 | * fc_lport_recv_rnid_req() - Handle received Request Node ID data request |
450 | * @sp: The sequence in the RNID exchange | |
451 | * @fp: The RNID request frame | |
452 | * @lport: The local port recieving the RNID | |
42e9a92f | 453 | * |
1b69bc06 | 454 | * Locking Note: The lport lock is expected to be held before calling |
42e9a92f RL |
455 | * this function. |
456 | */ | |
457 | static void fc_lport_recv_rnid_req(struct fc_seq *sp, struct fc_frame *in_fp, | |
458 | struct fc_lport *lport) | |
459 | { | |
460 | struct fc_frame *fp; | |
461 | struct fc_exch *ep = fc_seq_exch(sp); | |
462 | struct fc_els_rnid *req; | |
463 | struct { | |
464 | struct fc_els_rnid_resp rnid; | |
465 | struct fc_els_rnid_cid cid; | |
466 | struct fc_els_rnid_gen gen; | |
467 | } *rp; | |
468 | struct fc_seq_els_data rjt_data; | |
469 | u8 fmt; | |
470 | size_t len; | |
471 | u32 f_ctl; | |
472 | ||
7414705e RL |
473 | FC_LPORT_DBG(lport, "Received RNID request while in state %s\n", |
474 | fc_lport_state(lport)); | |
42e9a92f RL |
475 | |
476 | req = fc_frame_payload_get(in_fp, sizeof(*req)); | |
477 | if (!req) { | |
478 | rjt_data.fp = NULL; | |
479 | rjt_data.reason = ELS_RJT_LOGIC; | |
480 | rjt_data.explan = ELS_EXPL_NONE; | |
481 | lport->tt.seq_els_rsp_send(sp, ELS_LS_RJT, &rjt_data); | |
482 | } else { | |
483 | fmt = req->rnid_fmt; | |
484 | len = sizeof(*rp); | |
485 | if (fmt != ELS_RNIDF_GEN || | |
486 | ntohl(lport->rnid_gen.rnid_atype) == 0) { | |
487 | fmt = ELS_RNIDF_NONE; /* nothing to provide */ | |
488 | len -= sizeof(rp->gen); | |
489 | } | |
490 | fp = fc_frame_alloc(lport, len); | |
491 | if (fp) { | |
492 | rp = fc_frame_payload_get(fp, len); | |
493 | memset(rp, 0, len); | |
494 | rp->rnid.rnid_cmd = ELS_LS_ACC; | |
495 | rp->rnid.rnid_fmt = fmt; | |
496 | rp->rnid.rnid_cid_len = sizeof(rp->cid); | |
497 | rp->cid.rnid_wwpn = htonll(lport->wwpn); | |
498 | rp->cid.rnid_wwnn = htonll(lport->wwnn); | |
499 | if (fmt == ELS_RNIDF_GEN) { | |
500 | rp->rnid.rnid_sid_len = sizeof(rp->gen); | |
501 | memcpy(&rp->gen, &lport->rnid_gen, | |
502 | sizeof(rp->gen)); | |
503 | } | |
504 | sp = lport->tt.seq_start_next(sp); | |
505 | f_ctl = FC_FC_EX_CTX | FC_FC_LAST_SEQ; | |
506 | f_ctl |= FC_FC_END_SEQ | FC_FC_SEQ_INIT; | |
507 | fc_fill_fc_hdr(fp, FC_RCTL_ELS_REP, ep->did, ep->sid, | |
508 | FC_TYPE_ELS, f_ctl, 0); | |
509 | lport->tt.seq_send(lport, sp, fp); | |
510 | } | |
511 | } | |
512 | fc_frame_free(in_fp); | |
513 | } | |
514 | ||
42e9a92f | 515 | /** |
34f42a07 | 516 | * fc_lport_recv_logo_req() - Handle received fabric LOGO request |
3a3b42bf RL |
517 | * @sp: The sequence in the LOGO exchange |
518 | * @fp: The LOGO request frame | |
519 | * @lport: The local port recieving the LOGO | |
42e9a92f RL |
520 | * |
521 | * Locking Note: The lport lock is exected to be held before calling | |
522 | * this function. | |
523 | */ | |
524 | static void fc_lport_recv_logo_req(struct fc_seq *sp, struct fc_frame *fp, | |
525 | struct fc_lport *lport) | |
526 | { | |
527 | lport->tt.seq_els_rsp_send(sp, ELS_LS_ACC, NULL); | |
528 | fc_lport_enter_reset(lport); | |
529 | fc_frame_free(fp); | |
530 | } | |
531 | ||
532 | /** | |
34f42a07 | 533 | * fc_fabric_login() - Start the lport state machine |
3a3b42bf | 534 | * @lport: The local port that should log into the fabric |
42e9a92f RL |
535 | * |
536 | * Locking Note: This function should not be called | |
537 | * with the lport lock held. | |
538 | */ | |
539 | int fc_fabric_login(struct fc_lport *lport) | |
540 | { | |
541 | int rc = -1; | |
542 | ||
543 | mutex_lock(&lport->lp_mutex); | |
55a66d3c VD |
544 | if (lport->state == LPORT_ST_DISABLED || |
545 | lport->state == LPORT_ST_LOGO) { | |
546 | fc_lport_state_enter(lport, LPORT_ST_RESET); | |
42e9a92f RL |
547 | fc_lport_enter_reset(lport); |
548 | rc = 0; | |
549 | } | |
550 | mutex_unlock(&lport->lp_mutex); | |
551 | ||
552 | return rc; | |
553 | } | |
554 | EXPORT_SYMBOL(fc_fabric_login); | |
555 | ||
556 | /** | |
8faecddb | 557 | * __fc_linkup() - Handler for transport linkup events |
42e9a92f | 558 | * @lport: The lport whose link is up |
8faecddb CL |
559 | * |
560 | * Locking: must be called with the lp_mutex held | |
42e9a92f | 561 | */ |
8faecddb | 562 | void __fc_linkup(struct fc_lport *lport) |
42e9a92f | 563 | { |
bc0e17f6 VD |
564 | if (!lport->link_up) { |
565 | lport->link_up = 1; | |
42e9a92f RL |
566 | |
567 | if (lport->state == LPORT_ST_RESET) | |
568 | fc_lport_enter_flogi(lport); | |
569 | } | |
8faecddb CL |
570 | } |
571 | ||
572 | /** | |
573 | * fc_linkup() - Handler for transport linkup events | |
3a3b42bf | 574 | * @lport: The local port whose link is up |
8faecddb CL |
575 | */ |
576 | void fc_linkup(struct fc_lport *lport) | |
577 | { | |
ce8b5df0 | 578 | printk(KERN_INFO "host%d: libfc: Link up on port (%6.6x)\n", |
e6d8a1b0 | 579 | lport->host->host_no, fc_host_port_id(lport->host)); |
8faecddb CL |
580 | |
581 | mutex_lock(&lport->lp_mutex); | |
582 | __fc_linkup(lport); | |
42e9a92f RL |
583 | mutex_unlock(&lport->lp_mutex); |
584 | } | |
585 | EXPORT_SYMBOL(fc_linkup); | |
586 | ||
587 | /** | |
8faecddb | 588 | * __fc_linkdown() - Handler for transport linkdown events |
42e9a92f | 589 | * @lport: The lport whose link is down |
8faecddb CL |
590 | * |
591 | * Locking: must be called with the lp_mutex held | |
42e9a92f | 592 | */ |
8faecddb | 593 | void __fc_linkdown(struct fc_lport *lport) |
42e9a92f | 594 | { |
bc0e17f6 VD |
595 | if (lport->link_up) { |
596 | lport->link_up = 0; | |
42e9a92f RL |
597 | fc_lport_enter_reset(lport); |
598 | lport->tt.fcp_cleanup(lport); | |
599 | } | |
8faecddb CL |
600 | } |
601 | ||
602 | /** | |
603 | * fc_linkdown() - Handler for transport linkdown events | |
3a3b42bf | 604 | * @lport: The local port whose link is down |
8faecddb CL |
605 | */ |
606 | void fc_linkdown(struct fc_lport *lport) | |
607 | { | |
ce8b5df0 | 608 | printk(KERN_INFO "host%d: libfc: Link down on port (%6.6x)\n", |
e6d8a1b0 | 609 | lport->host->host_no, fc_host_port_id(lport->host)); |
8faecddb CL |
610 | |
611 | mutex_lock(&lport->lp_mutex); | |
612 | __fc_linkdown(lport); | |
42e9a92f RL |
613 | mutex_unlock(&lport->lp_mutex); |
614 | } | |
615 | EXPORT_SYMBOL(fc_linkdown); | |
616 | ||
42e9a92f | 617 | /** |
34f42a07 | 618 | * fc_fabric_logoff() - Logout of the fabric |
3a3b42bf | 619 | * @lport: The local port to logoff the fabric |
42e9a92f RL |
620 | * |
621 | * Return value: | |
622 | * 0 for success, -1 for failure | |
34f42a07 | 623 | */ |
42e9a92f RL |
624 | int fc_fabric_logoff(struct fc_lport *lport) |
625 | { | |
626 | lport->tt.disc_stop_final(lport); | |
627 | mutex_lock(&lport->lp_mutex); | |
3a3b42bf RL |
628 | if (lport->dns_rdata) |
629 | lport->tt.rport_logoff(lport->dns_rdata); | |
a0fd2e49 AJ |
630 | mutex_unlock(&lport->lp_mutex); |
631 | lport->tt.rport_flush_queue(); | |
632 | mutex_lock(&lport->lp_mutex); | |
42e9a92f RL |
633 | fc_lport_enter_logo(lport); |
634 | mutex_unlock(&lport->lp_mutex); | |
f7db2c15 | 635 | cancel_delayed_work_sync(&lport->retry_work); |
42e9a92f RL |
636 | return 0; |
637 | } | |
638 | EXPORT_SYMBOL(fc_fabric_logoff); | |
639 | ||
640 | /** | |
3a3b42bf RL |
641 | * fc_lport_destroy() - Unregister a fc_lport |
642 | * @lport: The local port to unregister | |
42e9a92f | 643 | * |
42e9a92f RL |
644 | * Note: |
645 | * exit routine for fc_lport instance | |
646 | * clean-up all the allocated memory | |
647 | * and free up other system resources. | |
648 | * | |
34f42a07 | 649 | */ |
42e9a92f RL |
650 | int fc_lport_destroy(struct fc_lport *lport) |
651 | { | |
bbf15669 | 652 | mutex_lock(&lport->lp_mutex); |
b1d9fd55 | 653 | lport->state = LPORT_ST_DISABLED; |
bbf15669 | 654 | lport->link_up = 0; |
42e9a92f | 655 | lport->tt.frame_send = fc_frame_drop; |
bbf15669 AJ |
656 | mutex_unlock(&lport->lp_mutex); |
657 | ||
42e9a92f | 658 | lport->tt.fcp_abort_io(lport); |
e9ba8b42 | 659 | lport->tt.disc_stop_final(lport); |
1f6ff364 | 660 | lport->tt.exch_mgr_reset(lport, 0, 0); |
42e9a92f RL |
661 | return 0; |
662 | } | |
663 | EXPORT_SYMBOL(fc_lport_destroy); | |
664 | ||
665 | /** | |
3a3b42bf RL |
666 | * fc_set_mfs() - Set the maximum frame size for a local port |
667 | * @lport: The local port to set the MFS for | |
668 | * @mfs: The new MFS | |
34f42a07 | 669 | */ |
42e9a92f RL |
670 | int fc_set_mfs(struct fc_lport *lport, u32 mfs) |
671 | { | |
672 | unsigned int old_mfs; | |
673 | int rc = -EINVAL; | |
674 | ||
675 | mutex_lock(&lport->lp_mutex); | |
676 | ||
677 | old_mfs = lport->mfs; | |
678 | ||
679 | if (mfs >= FC_MIN_MAX_FRAME) { | |
680 | mfs &= ~3; | |
681 | if (mfs > FC_MAX_FRAME) | |
682 | mfs = FC_MAX_FRAME; | |
683 | mfs -= sizeof(struct fc_frame_header); | |
684 | lport->mfs = mfs; | |
685 | rc = 0; | |
686 | } | |
687 | ||
688 | if (!rc && mfs < old_mfs) | |
689 | fc_lport_enter_reset(lport); | |
690 | ||
691 | mutex_unlock(&lport->lp_mutex); | |
692 | ||
693 | return rc; | |
694 | } | |
695 | EXPORT_SYMBOL(fc_set_mfs); | |
696 | ||
697 | /** | |
34f42a07 | 698 | * fc_lport_disc_callback() - Callback for discovery events |
3a3b42bf | 699 | * @lport: The local port receiving the event |
42e9a92f RL |
700 | * @event: The discovery event |
701 | */ | |
702 | void fc_lport_disc_callback(struct fc_lport *lport, enum fc_disc_event event) | |
703 | { | |
704 | switch (event) { | |
705 | case DISC_EV_SUCCESS: | |
7414705e | 706 | FC_LPORT_DBG(lport, "Discovery succeeded\n"); |
42e9a92f RL |
707 | break; |
708 | case DISC_EV_FAILED: | |
e6d8a1b0 | 709 | printk(KERN_ERR "host%d: libfc: " |
ce8b5df0 | 710 | "Discovery failed for port (%6.6x)\n", |
e6d8a1b0 | 711 | lport->host->host_no, fc_host_port_id(lport->host)); |
42e9a92f RL |
712 | mutex_lock(&lport->lp_mutex); |
713 | fc_lport_enter_reset(lport); | |
714 | mutex_unlock(&lport->lp_mutex); | |
715 | break; | |
716 | case DISC_EV_NONE: | |
717 | WARN_ON(1); | |
718 | break; | |
719 | } | |
720 | } | |
721 | ||
722 | /** | |
34f42a07 | 723 | * fc_rport_enter_ready() - Enter the ready state and start discovery |
3a3b42bf | 724 | * @lport: The local port that is ready |
42e9a92f RL |
725 | * |
726 | * Locking Note: The lport lock is expected to be held before calling | |
727 | * this routine. | |
728 | */ | |
729 | static void fc_lport_enter_ready(struct fc_lport *lport) | |
730 | { | |
7414705e RL |
731 | FC_LPORT_DBG(lport, "Entered READY from state %s\n", |
732 | fc_lport_state(lport)); | |
42e9a92f RL |
733 | |
734 | fc_lport_state_enter(lport, LPORT_ST_READY); | |
8faecddb CL |
735 | if (lport->vport) |
736 | fc_vport_set_state(lport->vport, FC_VPORT_ACTIVE); | |
737 | fc_vports_linkchange(lport); | |
42e9a92f | 738 | |
3a3b42bf | 739 | if (!lport->ptp_rdata) |
29d898e9 | 740 | lport->tt.disc_start(fc_lport_disc_callback, lport); |
42e9a92f RL |
741 | } |
742 | ||
093bb6a2 JE |
743 | /** |
744 | * fc_lport_set_port_id() - set the local port Port ID | |
745 | * @lport: The local port which will have its Port ID set. | |
746 | * @port_id: The new port ID. | |
747 | * @fp: The frame containing the incoming request, or NULL. | |
748 | * | |
749 | * Locking Note: The lport lock is expected to be held before calling | |
750 | * this function. | |
751 | */ | |
752 | static void fc_lport_set_port_id(struct fc_lport *lport, u32 port_id, | |
753 | struct fc_frame *fp) | |
754 | { | |
755 | if (port_id) | |
ce8b5df0 | 756 | printk(KERN_INFO "host%d: Assigned Port ID %6.6x\n", |
093bb6a2 JE |
757 | lport->host->host_no, port_id); |
758 | ||
759 | fc_host_port_id(lport->host) = port_id; | |
760 | if (lport->tt.lport_set_port_id) | |
761 | lport->tt.lport_set_port_id(lport, port_id, fp); | |
762 | } | |
763 | ||
42e9a92f | 764 | /** |
34f42a07 | 765 | * fc_lport_recv_flogi_req() - Receive a FLOGI request |
42e9a92f | 766 | * @sp_in: The sequence the FLOGI is on |
3a3b42bf RL |
767 | * @rx_fp: The FLOGI frame |
768 | * @lport: The local port that recieved the request | |
42e9a92f RL |
769 | * |
770 | * A received FLOGI request indicates a point-to-point connection. | |
771 | * Accept it with the common service parameters indicating our N port. | |
772 | * Set up to do a PLOGI if we have the higher-number WWPN. | |
773 | * | |
1b69bc06 | 774 | * Locking Note: The lport lock is expected to be held before calling |
42e9a92f RL |
775 | * this function. |
776 | */ | |
777 | static void fc_lport_recv_flogi_req(struct fc_seq *sp_in, | |
778 | struct fc_frame *rx_fp, | |
779 | struct fc_lport *lport) | |
780 | { | |
781 | struct fc_frame *fp; | |
782 | struct fc_frame_header *fh; | |
783 | struct fc_seq *sp; | |
784 | struct fc_exch *ep; | |
785 | struct fc_els_flogi *flp; | |
786 | struct fc_els_flogi *new_flp; | |
787 | u64 remote_wwpn; | |
788 | u32 remote_fid; | |
789 | u32 local_fid; | |
790 | u32 f_ctl; | |
791 | ||
7414705e RL |
792 | FC_LPORT_DBG(lport, "Received FLOGI request while in state %s\n", |
793 | fc_lport_state(lport)); | |
42e9a92f RL |
794 | |
795 | fh = fc_frame_header_get(rx_fp); | |
796 | remote_fid = ntoh24(fh->fh_s_id); | |
797 | flp = fc_frame_payload_get(rx_fp, sizeof(*flp)); | |
798 | if (!flp) | |
799 | goto out; | |
800 | remote_wwpn = get_unaligned_be64(&flp->fl_wwpn); | |
801 | if (remote_wwpn == lport->wwpn) { | |
e6d8a1b0 JE |
802 | printk(KERN_WARNING "host%d: libfc: Received FLOGI from port " |
803 | "with same WWPN %llx\n", | |
804 | lport->host->host_no, remote_wwpn); | |
42e9a92f RL |
805 | goto out; |
806 | } | |
7414705e | 807 | FC_LPORT_DBG(lport, "FLOGI from port WWPN %llx\n", remote_wwpn); |
42e9a92f RL |
808 | |
809 | /* | |
810 | * XXX what is the right thing to do for FIDs? | |
811 | * The originator might expect our S_ID to be 0xfffffe. | |
812 | * But if so, both of us could end up with the same FID. | |
813 | */ | |
814 | local_fid = FC_LOCAL_PTP_FID_LO; | |
815 | if (remote_wwpn < lport->wwpn) { | |
816 | local_fid = FC_LOCAL_PTP_FID_HI; | |
817 | if (!remote_fid || remote_fid == local_fid) | |
818 | remote_fid = FC_LOCAL_PTP_FID_LO; | |
819 | } else if (!remote_fid) { | |
820 | remote_fid = FC_LOCAL_PTP_FID_HI; | |
821 | } | |
822 | ||
093bb6a2 | 823 | fc_lport_set_port_id(lport, local_fid, rx_fp); |
42e9a92f RL |
824 | |
825 | fp = fc_frame_alloc(lport, sizeof(*flp)); | |
826 | if (fp) { | |
827 | sp = lport->tt.seq_start_next(fr_seq(rx_fp)); | |
828 | new_flp = fc_frame_payload_get(fp, sizeof(*flp)); | |
829 | fc_lport_flogi_fill(lport, new_flp, ELS_FLOGI); | |
830 | new_flp->fl_cmd = (u8) ELS_LS_ACC; | |
831 | ||
832 | /* | |
833 | * Send the response. If this fails, the originator should | |
834 | * repeat the sequence. | |
835 | */ | |
836 | f_ctl = FC_FC_EX_CTX | FC_FC_LAST_SEQ | FC_FC_END_SEQ; | |
837 | ep = fc_seq_exch(sp); | |
ccfc3098 | 838 | fc_fill_fc_hdr(fp, FC_RCTL_ELS_REP, remote_fid, local_fid, |
42e9a92f RL |
839 | FC_TYPE_ELS, f_ctl, 0); |
840 | lport->tt.seq_send(lport, sp, fp); | |
841 | ||
842 | } else { | |
843 | fc_lport_error(lport, fp); | |
844 | } | |
845 | fc_lport_ptp_setup(lport, remote_fid, remote_wwpn, | |
846 | get_unaligned_be64(&flp->fl_wwnn)); | |
847 | ||
42e9a92f RL |
848 | out: |
849 | sp = fr_seq(rx_fp); | |
850 | fc_frame_free(rx_fp); | |
851 | } | |
852 | ||
853 | /** | |
34f42a07 | 854 | * fc_lport_recv_req() - The generic lport request handler |
3a3b42bf RL |
855 | * @lport: The local port that received the request |
856 | * @sp: The sequence the request is on | |
857 | * @fp: The request frame | |
42e9a92f RL |
858 | * |
859 | * This function will see if the lport handles the request or | |
860 | * if an rport should handle the request. | |
861 | * | |
862 | * Locking Note: This function should not be called with the lport | |
863 | * lock held becuase it will grab the lock. | |
864 | */ | |
865 | static void fc_lport_recv_req(struct fc_lport *lport, struct fc_seq *sp, | |
866 | struct fc_frame *fp) | |
867 | { | |
868 | struct fc_frame_header *fh = fc_frame_header_get(fp); | |
869 | void (*recv) (struct fc_seq *, struct fc_frame *, struct fc_lport *); | |
42e9a92f RL |
870 | |
871 | mutex_lock(&lport->lp_mutex); | |
872 | ||
873 | /* | |
874 | * Handle special ELS cases like FLOGI, LOGO, and | |
875 | * RSCN here. These don't require a session. | |
876 | * Even if we had a session, it might not be ready. | |
877 | */ | |
e9ba8b42 JE |
878 | if (!lport->link_up) |
879 | fc_frame_free(fp); | |
880 | else if (fh->fh_type == FC_TYPE_ELS && | |
881 | fh->fh_r_ctl == FC_RCTL_ELS_REQ) { | |
42e9a92f RL |
882 | /* |
883 | * Check opcode. | |
884 | */ | |
131203a1 | 885 | recv = lport->tt.rport_recv_req; |
42e9a92f RL |
886 | switch (fc_frame_payload_op(fp)) { |
887 | case ELS_FLOGI: | |
888 | recv = fc_lport_recv_flogi_req; | |
889 | break; | |
890 | case ELS_LOGO: | |
891 | fh = fc_frame_header_get(fp); | |
892 | if (ntoh24(fh->fh_s_id) == FC_FID_FLOGI) | |
893 | recv = fc_lport_recv_logo_req; | |
894 | break; | |
895 | case ELS_RSCN: | |
896 | recv = lport->tt.disc_recv_req; | |
897 | break; | |
898 | case ELS_ECHO: | |
899 | recv = fc_lport_recv_echo_req; | |
900 | break; | |
901 | case ELS_RLIR: | |
902 | recv = fc_lport_recv_rlir_req; | |
903 | break; | |
904 | case ELS_RNID: | |
905 | recv = fc_lport_recv_rnid_req; | |
906 | break; | |
42e9a92f RL |
907 | } |
908 | ||
131203a1 | 909 | recv(sp, fp, lport); |
42e9a92f | 910 | } else { |
7414705e RL |
911 | FC_LPORT_DBG(lport, "dropping invalid frame (eof %x)\n", |
912 | fr_eof(fp)); | |
42e9a92f RL |
913 | fc_frame_free(fp); |
914 | } | |
915 | mutex_unlock(&lport->lp_mutex); | |
916 | ||
917 | /* | |
918 | * The common exch_done for all request may not be good | |
919 | * if any request requires longer hold on exhange. XXX | |
920 | */ | |
921 | lport->tt.exch_done(sp); | |
922 | } | |
923 | ||
924 | /** | |
3a3b42bf RL |
925 | * fc_lport_reset() - Reset a local port |
926 | * @lport: The local port which should be reset | |
42e9a92f RL |
927 | * |
928 | * Locking Note: This functions should not be called with the | |
929 | * lport lock held. | |
930 | */ | |
931 | int fc_lport_reset(struct fc_lport *lport) | |
932 | { | |
f7db2c15 | 933 | cancel_delayed_work_sync(&lport->retry_work); |
42e9a92f RL |
934 | mutex_lock(&lport->lp_mutex); |
935 | fc_lport_enter_reset(lport); | |
936 | mutex_unlock(&lport->lp_mutex); | |
937 | return 0; | |
938 | } | |
939 | EXPORT_SYMBOL(fc_lport_reset); | |
940 | ||
941 | /** | |
3a3b42bf RL |
942 | * fc_lport_reset_locked() - Reset the local port w/ the lport lock held |
943 | * @lport: The local port to be reset | |
42e9a92f RL |
944 | * |
945 | * Locking Note: The lport lock is expected to be held before calling | |
946 | * this routine. | |
947 | */ | |
1190d925 | 948 | static void fc_lport_reset_locked(struct fc_lport *lport) |
42e9a92f | 949 | { |
3a3b42bf RL |
950 | if (lport->dns_rdata) |
951 | lport->tt.rport_logoff(lport->dns_rdata); | |
42e9a92f | 952 | |
2f2ac4a0 JE |
953 | if (lport->ptp_rdata) { |
954 | lport->tt.rport_logoff(lport->ptp_rdata); | |
955 | kref_put(&lport->ptp_rdata->kref, lport->tt.rport_destroy); | |
956 | lport->ptp_rdata = NULL; | |
957 | } | |
42e9a92f RL |
958 | |
959 | lport->tt.disc_stop(lport); | |
960 | ||
1f6ff364 | 961 | lport->tt.exch_mgr_reset(lport, 0, 0); |
42e9a92f | 962 | fc_host_fabric_name(lport->host) = 0; |
093bb6a2 JE |
963 | |
964 | if (fc_host_port_id(lport->host)) | |
965 | fc_lport_set_port_id(lport, 0, NULL); | |
1190d925 | 966 | } |
42e9a92f | 967 | |
1190d925 JE |
968 | /** |
969 | * fc_lport_enter_reset() - Reset the local port | |
3a3b42bf | 970 | * @lport: The local port to be reset |
1190d925 JE |
971 | * |
972 | * Locking Note: The lport lock is expected to be held before calling | |
973 | * this routine. | |
974 | */ | |
975 | static void fc_lport_enter_reset(struct fc_lport *lport) | |
976 | { | |
977 | FC_LPORT_DBG(lport, "Entered RESET state from %s state\n", | |
978 | fc_lport_state(lport)); | |
979 | ||
55a66d3c VD |
980 | if (lport->state == LPORT_ST_DISABLED || lport->state == LPORT_ST_LOGO) |
981 | return; | |
982 | ||
8faecddb CL |
983 | if (lport->vport) { |
984 | if (lport->link_up) | |
985 | fc_vport_set_state(lport->vport, FC_VPORT_INITIALIZING); | |
986 | else | |
987 | fc_vport_set_state(lport->vport, FC_VPORT_LINKDOWN); | |
988 | } | |
1190d925 | 989 | fc_lport_state_enter(lport, LPORT_ST_RESET); |
8faecddb | 990 | fc_vports_linkchange(lport); |
1190d925 | 991 | fc_lport_reset_locked(lport); |
bc0e17f6 | 992 | if (lport->link_up) |
42e9a92f RL |
993 | fc_lport_enter_flogi(lport); |
994 | } | |
995 | ||
1190d925 | 996 | /** |
3a3b42bf RL |
997 | * fc_lport_enter_disabled() - Disable the local port |
998 | * @lport: The local port to be reset | |
1190d925 JE |
999 | * |
1000 | * Locking Note: The lport lock is expected to be held before calling | |
1001 | * this routine. | |
1002 | */ | |
1003 | static void fc_lport_enter_disabled(struct fc_lport *lport) | |
1004 | { | |
1005 | FC_LPORT_DBG(lport, "Entered disabled state from %s state\n", | |
1006 | fc_lport_state(lport)); | |
1007 | ||
1008 | fc_lport_state_enter(lport, LPORT_ST_DISABLED); | |
8faecddb | 1009 | fc_vports_linkchange(lport); |
1190d925 JE |
1010 | fc_lport_reset_locked(lport); |
1011 | } | |
1012 | ||
42e9a92f | 1013 | /** |
34f42a07 | 1014 | * fc_lport_error() - Handler for any errors |
3a3b42bf RL |
1015 | * @lport: The local port that the error was on |
1016 | * @fp: The error code encoded in a frame pointer | |
42e9a92f RL |
1017 | * |
1018 | * If the error was caused by a resource allocation failure | |
1019 | * then wait for half a second and retry, otherwise retry | |
1020 | * after the e_d_tov time. | |
1021 | */ | |
1022 | static void fc_lport_error(struct fc_lport *lport, struct fc_frame *fp) | |
1023 | { | |
1024 | unsigned long delay = 0; | |
7414705e RL |
1025 | FC_LPORT_DBG(lport, "Error %ld in state %s, retries %d\n", |
1026 | PTR_ERR(fp), fc_lport_state(lport), | |
1027 | lport->retry_count); | |
42e9a92f RL |
1028 | |
1029 | if (!fp || PTR_ERR(fp) == -FC_EX_TIMEOUT) { | |
1030 | /* | |
1031 | * Memory allocation failure, or the exchange timed out. | |
1032 | * Retry after delay | |
1033 | */ | |
1034 | if (lport->retry_count < lport->max_retry_count) { | |
1035 | lport->retry_count++; | |
1036 | if (!fp) | |
1037 | delay = msecs_to_jiffies(500); | |
1038 | else | |
1039 | delay = msecs_to_jiffies(lport->e_d_tov); | |
1040 | ||
1041 | schedule_delayed_work(&lport->retry_work, delay); | |
1042 | } else { | |
1043 | switch (lport->state) { | |
b1d9fd55 | 1044 | case LPORT_ST_DISABLED: |
42e9a92f RL |
1045 | case LPORT_ST_READY: |
1046 | case LPORT_ST_RESET: | |
c9c7bd7a | 1047 | case LPORT_ST_RNN_ID: |
5baa17c3 | 1048 | case LPORT_ST_RSNN_NN: |
c9866a54 | 1049 | case LPORT_ST_RSPN_ID: |
42e9a92f | 1050 | case LPORT_ST_RFT_ID: |
ab593b18 | 1051 | case LPORT_ST_RFF_ID: |
42e9a92f RL |
1052 | case LPORT_ST_SCR: |
1053 | case LPORT_ST_DNS: | |
1054 | case LPORT_ST_FLOGI: | |
1055 | case LPORT_ST_LOGO: | |
1056 | fc_lport_enter_reset(lport); | |
1057 | break; | |
1058 | } | |
1059 | } | |
1060 | } | |
1061 | } | |
1062 | ||
1063 | /** | |
7cccc157 | 1064 | * fc_lport_ns_resp() - Handle response to a name server |
3a3b42bf RL |
1065 | * registration exchange |
1066 | * @sp: current sequence in exchange | |
1067 | * @fp: response frame | |
42e9a92f RL |
1068 | * @lp_arg: Fibre Channel host port instance |
1069 | * | |
1070 | * Locking Note: This function will be called without the lport lock | |
3a3b42bf | 1071 | * held, but it will lock, call an _enter_* function or fc_lport_error() |
42e9a92f RL |
1072 | * and then unlock the lport. |
1073 | */ | |
7cccc157 CL |
1074 | static void fc_lport_ns_resp(struct fc_seq *sp, struct fc_frame *fp, |
1075 | void *lp_arg) | |
42e9a92f RL |
1076 | { |
1077 | struct fc_lport *lport = lp_arg; | |
1078 | struct fc_frame_header *fh; | |
1079 | struct fc_ct_hdr *ct; | |
1080 | ||
7cccc157 | 1081 | FC_LPORT_DBG(lport, "Received a ns %s\n", fc_els_resp_type(fp)); |
f657d299 | 1082 | |
42e9a92f RL |
1083 | if (fp == ERR_PTR(-FC_EX_CLOSED)) |
1084 | return; | |
1085 | ||
1086 | mutex_lock(&lport->lp_mutex); | |
1087 | ||
ab593b18 | 1088 | if (lport->state < LPORT_ST_RNN_ID || lport->state > LPORT_ST_RFF_ID) { |
7cccc157 | 1089 | FC_LPORT_DBG(lport, "Received a name server response, " |
3a3b42bf | 1090 | "but in state %s\n", fc_lport_state(lport)); |
76f6804e AJ |
1091 | if (IS_ERR(fp)) |
1092 | goto err; | |
42e9a92f RL |
1093 | goto out; |
1094 | } | |
1095 | ||
76f6804e AJ |
1096 | if (IS_ERR(fp)) { |
1097 | fc_lport_error(lport, fp); | |
1098 | goto err; | |
1099 | } | |
1100 | ||
42e9a92f RL |
1101 | fh = fc_frame_header_get(fp); |
1102 | ct = fc_frame_payload_get(fp, sizeof(*ct)); | |
1103 | ||
1104 | if (fh && ct && fh->fh_type == FC_TYPE_CT && | |
1105 | ct->ct_fs_type == FC_FST_DIR && | |
1106 | ct->ct_fs_subtype == FC_NS_SUBTYPE && | |
1107 | ntohs(ct->ct_cmd) == FC_FS_ACC) | |
7cccc157 CL |
1108 | switch (lport->state) { |
1109 | case LPORT_ST_RNN_ID: | |
c914f7d1 | 1110 | fc_lport_enter_ns(lport, LPORT_ST_RSNN_NN); |
7cccc157 CL |
1111 | break; |
1112 | case LPORT_ST_RSNN_NN: | |
c914f7d1 | 1113 | fc_lport_enter_ns(lport, LPORT_ST_RSPN_ID); |
7cccc157 CL |
1114 | break; |
1115 | case LPORT_ST_RSPN_ID: | |
c914f7d1 | 1116 | fc_lport_enter_ns(lport, LPORT_ST_RFT_ID); |
7cccc157 CL |
1117 | break; |
1118 | case LPORT_ST_RFT_ID: | |
ab593b18 JE |
1119 | fc_lport_enter_ns(lport, LPORT_ST_RFF_ID); |
1120 | break; | |
1121 | case LPORT_ST_RFF_ID: | |
7cccc157 CL |
1122 | fc_lport_enter_scr(lport); |
1123 | break; | |
1124 | default: | |
1125 | /* should have already been caught by state checks */ | |
1126 | break; | |
1127 | } | |
c9c7bd7a CL |
1128 | else |
1129 | fc_lport_error(lport, fp); | |
c9c7bd7a CL |
1130 | out: |
1131 | fc_frame_free(fp); | |
1132 | err: | |
1133 | mutex_unlock(&lport->lp_mutex); | |
1134 | } | |
1135 | ||
42e9a92f | 1136 | /** |
34f42a07 | 1137 | * fc_lport_scr_resp() - Handle response to State Change Register (SCR) request |
3a3b42bf RL |
1138 | * @sp: current sequence in SCR exchange |
1139 | * @fp: response frame | |
42e9a92f RL |
1140 | * @lp_arg: Fibre Channel lport port instance that sent the registration request |
1141 | * | |
1142 | * Locking Note: This function will be called without the lport lock | |
1143 | * held, but it will lock, call an _enter_* function or fc_lport_error | |
1144 | * and then unlock the lport. | |
1145 | */ | |
1146 | static void fc_lport_scr_resp(struct fc_seq *sp, struct fc_frame *fp, | |
1147 | void *lp_arg) | |
1148 | { | |
1149 | struct fc_lport *lport = lp_arg; | |
1150 | u8 op; | |
1151 | ||
f657d299 JE |
1152 | FC_LPORT_DBG(lport, "Received a SCR %s\n", fc_els_resp_type(fp)); |
1153 | ||
42e9a92f RL |
1154 | if (fp == ERR_PTR(-FC_EX_CLOSED)) |
1155 | return; | |
1156 | ||
1157 | mutex_lock(&lport->lp_mutex); | |
1158 | ||
42e9a92f | 1159 | if (lport->state != LPORT_ST_SCR) { |
7414705e RL |
1160 | FC_LPORT_DBG(lport, "Received a SCR response, but in state " |
1161 | "%s\n", fc_lport_state(lport)); | |
76f6804e AJ |
1162 | if (IS_ERR(fp)) |
1163 | goto err; | |
42e9a92f RL |
1164 | goto out; |
1165 | } | |
1166 | ||
76f6804e AJ |
1167 | if (IS_ERR(fp)) { |
1168 | fc_lport_error(lport, fp); | |
1169 | goto err; | |
1170 | } | |
1171 | ||
42e9a92f RL |
1172 | op = fc_frame_payload_op(fp); |
1173 | if (op == ELS_LS_ACC) | |
1174 | fc_lport_enter_ready(lport); | |
1175 | else | |
1176 | fc_lport_error(lport, fp); | |
1177 | ||
1178 | out: | |
1179 | fc_frame_free(fp); | |
1180 | err: | |
1181 | mutex_unlock(&lport->lp_mutex); | |
1182 | } | |
1183 | ||
1184 | /** | |
3a3b42bf RL |
1185 | * fc_lport_enter_scr() - Send a SCR (State Change Register) request |
1186 | * @lport: The local port to register for state changes | |
42e9a92f RL |
1187 | * |
1188 | * Locking Note: The lport lock is expected to be held before calling | |
1189 | * this routine. | |
1190 | */ | |
1191 | static void fc_lport_enter_scr(struct fc_lport *lport) | |
1192 | { | |
1193 | struct fc_frame *fp; | |
1194 | ||
7414705e RL |
1195 | FC_LPORT_DBG(lport, "Entered SCR state from %s state\n", |
1196 | fc_lport_state(lport)); | |
42e9a92f RL |
1197 | |
1198 | fc_lport_state_enter(lport, LPORT_ST_SCR); | |
1199 | ||
1200 | fp = fc_frame_alloc(lport, sizeof(struct fc_els_scr)); | |
1201 | if (!fp) { | |
1202 | fc_lport_error(lport, fp); | |
1203 | return; | |
1204 | } | |
1205 | ||
a46f327a | 1206 | if (!lport->tt.elsct_send(lport, FC_FID_FCTRL, fp, ELS_SCR, |
b94f8951 JE |
1207 | fc_lport_scr_resp, lport, |
1208 | 2 * lport->r_a_tov)) | |
8f550f93 | 1209 | fc_lport_error(lport, NULL); |
42e9a92f RL |
1210 | } |
1211 | ||
1212 | /** | |
c914f7d1 | 1213 | * fc_lport_enter_ns() - register some object with the name server |
42e9a92f RL |
1214 | * @lport: Fibre Channel local port to register |
1215 | * | |
1216 | * Locking Note: The lport lock is expected to be held before calling | |
1217 | * this routine. | |
1218 | */ | |
c914f7d1 | 1219 | static void fc_lport_enter_ns(struct fc_lport *lport, enum fc_lport_state state) |
c9866a54 CL |
1220 | { |
1221 | struct fc_frame *fp; | |
c914f7d1 CL |
1222 | enum fc_ns_req cmd; |
1223 | int size = sizeof(struct fc_ct_hdr); | |
c9866a54 CL |
1224 | size_t len; |
1225 | ||
c914f7d1 CL |
1226 | FC_LPORT_DBG(lport, "Entered %s state from %s state\n", |
1227 | fc_lport_state_names[state], | |
c9866a54 CL |
1228 | fc_lport_state(lport)); |
1229 | ||
c914f7d1 | 1230 | fc_lport_state_enter(lport, state); |
c9866a54 | 1231 | |
c914f7d1 CL |
1232 | switch (state) { |
1233 | case LPORT_ST_RNN_ID: | |
1234 | cmd = FC_NS_RNN_ID; | |
1235 | size += sizeof(struct fc_ns_rn_id); | |
1236 | break; | |
1237 | case LPORT_ST_RSNN_NN: | |
1238 | len = strnlen(fc_host_symbolic_name(lport->host), 255); | |
1239 | /* if there is no symbolic name, skip to RFT_ID */ | |
1240 | if (!len) | |
1241 | return fc_lport_enter_ns(lport, LPORT_ST_RFT_ID); | |
1242 | cmd = FC_NS_RSNN_NN; | |
1243 | size += sizeof(struct fc_ns_rsnn) + len; | |
1244 | break; | |
1245 | case LPORT_ST_RSPN_ID: | |
1246 | len = strnlen(fc_host_symbolic_name(lport->host), 255); | |
1247 | /* if there is no symbolic name, skip to RFT_ID */ | |
1248 | if (!len) | |
1249 | return fc_lport_enter_ns(lport, LPORT_ST_RFT_ID); | |
1250 | cmd = FC_NS_RSPN_ID; | |
1251 | size += sizeof(struct fc_ns_rspn) + len; | |
1252 | break; | |
1253 | case LPORT_ST_RFT_ID: | |
1254 | cmd = FC_NS_RFT_ID; | |
1255 | size += sizeof(struct fc_ns_rft); | |
1256 | break; | |
ab593b18 JE |
1257 | case LPORT_ST_RFF_ID: |
1258 | cmd = FC_NS_RFF_ID; | |
1259 | size += sizeof(struct fc_ns_rff_id); | |
1260 | break; | |
c914f7d1 CL |
1261 | default: |
1262 | fc_lport_error(lport, NULL); | |
5baa17c3 CL |
1263 | return; |
1264 | } | |
1265 | ||
c914f7d1 | 1266 | fp = fc_frame_alloc(lport, size); |
c9c7bd7a CL |
1267 | if (!fp) { |
1268 | fc_lport_error(lport, fp); | |
1269 | return; | |
1270 | } | |
1271 | ||
c914f7d1 | 1272 | if (!lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, cmd, |
7cccc157 | 1273 | fc_lport_ns_resp, |
b94f8951 | 1274 | lport, 3 * lport->r_a_tov)) |
c9c7bd7a CL |
1275 | fc_lport_error(lport, fp); |
1276 | } | |
1277 | ||
42e9a92f RL |
1278 | static struct fc_rport_operations fc_lport_rport_ops = { |
1279 | .event_callback = fc_lport_rport_callback, | |
1280 | }; | |
1281 | ||
1282 | /** | |
3a3b42bf RL |
1283 | * fc_rport_enter_dns() - Create a fc_rport for the name server |
1284 | * @lport: The local port requesting a remote port for the name server | |
42e9a92f RL |
1285 | * |
1286 | * Locking Note: The lport lock is expected to be held before calling | |
1287 | * this routine. | |
1288 | */ | |
1289 | static void fc_lport_enter_dns(struct fc_lport *lport) | |
1290 | { | |
ab28f1fd | 1291 | struct fc_rport_priv *rdata; |
42e9a92f | 1292 | |
7414705e RL |
1293 | FC_LPORT_DBG(lport, "Entered DNS state from %s state\n", |
1294 | fc_lport_state(lport)); | |
42e9a92f RL |
1295 | |
1296 | fc_lport_state_enter(lport, LPORT_ST_DNS); | |
1297 | ||
48f00902 | 1298 | mutex_lock(&lport->disc.disc_mutex); |
9737e6a7 | 1299 | rdata = lport->tt.rport_create(lport, FC_FID_DIR_SERV); |
48f00902 | 1300 | mutex_unlock(&lport->disc.disc_mutex); |
9fb9d328 | 1301 | if (!rdata) |
42e9a92f RL |
1302 | goto err; |
1303 | ||
42e9a92f | 1304 | rdata->ops = &fc_lport_rport_ops; |
9fb9d328 | 1305 | lport->tt.rport_login(rdata); |
42e9a92f RL |
1306 | return; |
1307 | ||
1308 | err: | |
1309 | fc_lport_error(lport, NULL); | |
1310 | } | |
1311 | ||
1312 | /** | |
3a3b42bf RL |
1313 | * fc_lport_timeout() - Handler for the retry_work timer |
1314 | * @work: The work struct of the local port | |
42e9a92f RL |
1315 | */ |
1316 | static void fc_lport_timeout(struct work_struct *work) | |
1317 | { | |
1318 | struct fc_lport *lport = | |
1319 | container_of(work, struct fc_lport, | |
1320 | retry_work.work); | |
1321 | ||
1322 | mutex_lock(&lport->lp_mutex); | |
1323 | ||
1324 | switch (lport->state) { | |
b1d9fd55 | 1325 | case LPORT_ST_DISABLED: |
22655ac2 JE |
1326 | WARN_ON(1); |
1327 | break; | |
42e9a92f | 1328 | case LPORT_ST_READY: |
42e9a92f RL |
1329 | WARN_ON(1); |
1330 | break; | |
22655ac2 JE |
1331 | case LPORT_ST_RESET: |
1332 | break; | |
42e9a92f RL |
1333 | case LPORT_ST_FLOGI: |
1334 | fc_lport_enter_flogi(lport); | |
1335 | break; | |
1336 | case LPORT_ST_DNS: | |
1337 | fc_lport_enter_dns(lport); | |
1338 | break; | |
c9c7bd7a | 1339 | case LPORT_ST_RNN_ID: |
5baa17c3 | 1340 | case LPORT_ST_RSNN_NN: |
c9866a54 | 1341 | case LPORT_ST_RSPN_ID: |
42e9a92f | 1342 | case LPORT_ST_RFT_ID: |
ab593b18 | 1343 | case LPORT_ST_RFF_ID: |
c914f7d1 | 1344 | fc_lport_enter_ns(lport, lport->state); |
42e9a92f RL |
1345 | break; |
1346 | case LPORT_ST_SCR: | |
1347 | fc_lport_enter_scr(lport); | |
1348 | break; | |
1349 | case LPORT_ST_LOGO: | |
1350 | fc_lport_enter_logo(lport); | |
1351 | break; | |
1352 | } | |
1353 | ||
1354 | mutex_unlock(&lport->lp_mutex); | |
1355 | } | |
1356 | ||
1357 | /** | |
34f42a07 | 1358 | * fc_lport_logo_resp() - Handle response to LOGO request |
3a3b42bf RL |
1359 | * @sp: The sequence that the LOGO was on |
1360 | * @fp: The LOGO frame | |
1361 | * @lp_arg: The lport port that received the LOGO request | |
42e9a92f RL |
1362 | * |
1363 | * Locking Note: This function will be called without the lport lock | |
3a3b42bf | 1364 | * held, but it will lock, call an _enter_* function or fc_lport_error() |
42e9a92f RL |
1365 | * and then unlock the lport. |
1366 | */ | |
11b56188 | 1367 | void fc_lport_logo_resp(struct fc_seq *sp, struct fc_frame *fp, |
3a3b42bf | 1368 | void *lp_arg) |
42e9a92f RL |
1369 | { |
1370 | struct fc_lport *lport = lp_arg; | |
1371 | u8 op; | |
1372 | ||
f657d299 JE |
1373 | FC_LPORT_DBG(lport, "Received a LOGO %s\n", fc_els_resp_type(fp)); |
1374 | ||
42e9a92f RL |
1375 | if (fp == ERR_PTR(-FC_EX_CLOSED)) |
1376 | return; | |
1377 | ||
1378 | mutex_lock(&lport->lp_mutex); | |
1379 | ||
42e9a92f | 1380 | if (lport->state != LPORT_ST_LOGO) { |
7414705e RL |
1381 | FC_LPORT_DBG(lport, "Received a LOGO response, but in state " |
1382 | "%s\n", fc_lport_state(lport)); | |
76f6804e AJ |
1383 | if (IS_ERR(fp)) |
1384 | goto err; | |
42e9a92f RL |
1385 | goto out; |
1386 | } | |
1387 | ||
76f6804e AJ |
1388 | if (IS_ERR(fp)) { |
1389 | fc_lport_error(lport, fp); | |
1390 | goto err; | |
1391 | } | |
1392 | ||
42e9a92f RL |
1393 | op = fc_frame_payload_op(fp); |
1394 | if (op == ELS_LS_ACC) | |
1190d925 | 1395 | fc_lport_enter_disabled(lport); |
42e9a92f RL |
1396 | else |
1397 | fc_lport_error(lport, fp); | |
1398 | ||
1399 | out: | |
1400 | fc_frame_free(fp); | |
1401 | err: | |
1402 | mutex_unlock(&lport->lp_mutex); | |
1403 | } | |
11b56188 | 1404 | EXPORT_SYMBOL(fc_lport_logo_resp); |
42e9a92f RL |
1405 | |
1406 | /** | |
34f42a07 | 1407 | * fc_rport_enter_logo() - Logout of the fabric |
3a3b42bf | 1408 | * @lport: The local port to be logged out |
42e9a92f RL |
1409 | * |
1410 | * Locking Note: The lport lock is expected to be held before calling | |
1411 | * this routine. | |
1412 | */ | |
1413 | static void fc_lport_enter_logo(struct fc_lport *lport) | |
1414 | { | |
1415 | struct fc_frame *fp; | |
1416 | struct fc_els_logo *logo; | |
1417 | ||
7414705e RL |
1418 | FC_LPORT_DBG(lport, "Entered LOGO state from %s state\n", |
1419 | fc_lport_state(lport)); | |
42e9a92f RL |
1420 | |
1421 | fc_lport_state_enter(lport, LPORT_ST_LOGO); | |
8faecddb | 1422 | fc_vports_linkchange(lport); |
42e9a92f | 1423 | |
42e9a92f RL |
1424 | fp = fc_frame_alloc(lport, sizeof(*logo)); |
1425 | if (!fp) { | |
1426 | fc_lport_error(lport, fp); | |
1427 | return; | |
1428 | } | |
1429 | ||
a46f327a | 1430 | if (!lport->tt.elsct_send(lport, FC_FID_FLOGI, fp, ELS_LOGO, |
b94f8951 JE |
1431 | fc_lport_logo_resp, lport, |
1432 | 2 * lport->r_a_tov)) | |
8f550f93 | 1433 | fc_lport_error(lport, NULL); |
42e9a92f RL |
1434 | } |
1435 | ||
1436 | /** | |
34f42a07 | 1437 | * fc_lport_flogi_resp() - Handle response to FLOGI request |
3a3b42bf RL |
1438 | * @sp: The sequence that the FLOGI was on |
1439 | * @fp: The FLOGI response frame | |
1440 | * @lp_arg: The lport port that received the FLOGI response | |
42e9a92f RL |
1441 | * |
1442 | * Locking Note: This function will be called without the lport lock | |
3a3b42bf | 1443 | * held, but it will lock, call an _enter_* function or fc_lport_error() |
42e9a92f RL |
1444 | * and then unlock the lport. |
1445 | */ | |
11b56188 | 1446 | void fc_lport_flogi_resp(struct fc_seq *sp, struct fc_frame *fp, |
3a3b42bf | 1447 | void *lp_arg) |
42e9a92f RL |
1448 | { |
1449 | struct fc_lport *lport = lp_arg; | |
1450 | struct fc_frame_header *fh; | |
1451 | struct fc_els_flogi *flp; | |
1452 | u32 did; | |
1453 | u16 csp_flags; | |
1454 | unsigned int r_a_tov; | |
1455 | unsigned int e_d_tov; | |
1456 | u16 mfs; | |
1457 | ||
f657d299 JE |
1458 | FC_LPORT_DBG(lport, "Received a FLOGI %s\n", fc_els_resp_type(fp)); |
1459 | ||
42e9a92f RL |
1460 | if (fp == ERR_PTR(-FC_EX_CLOSED)) |
1461 | return; | |
1462 | ||
1463 | mutex_lock(&lport->lp_mutex); | |
1464 | ||
42e9a92f | 1465 | if (lport->state != LPORT_ST_FLOGI) { |
7414705e RL |
1466 | FC_LPORT_DBG(lport, "Received a FLOGI response, but in state " |
1467 | "%s\n", fc_lport_state(lport)); | |
76f6804e AJ |
1468 | if (IS_ERR(fp)) |
1469 | goto err; | |
42e9a92f RL |
1470 | goto out; |
1471 | } | |
1472 | ||
76f6804e AJ |
1473 | if (IS_ERR(fp)) { |
1474 | fc_lport_error(lport, fp); | |
1475 | goto err; | |
1476 | } | |
1477 | ||
42e9a92f RL |
1478 | fh = fc_frame_header_get(fp); |
1479 | did = ntoh24(fh->fh_d_id); | |
1480 | if (fc_frame_payload_op(fp) == ELS_LS_ACC && did != 0) { | |
42e9a92f RL |
1481 | flp = fc_frame_payload_get(fp, sizeof(*flp)); |
1482 | if (flp) { | |
1483 | mfs = ntohs(flp->fl_csp.sp_bb_data) & | |
1484 | FC_SP_BB_DATA_MASK; | |
1485 | if (mfs >= FC_SP_MIN_MAX_PAYLOAD && | |
1486 | mfs < lport->mfs) | |
1487 | lport->mfs = mfs; | |
1488 | csp_flags = ntohs(flp->fl_csp.sp_features); | |
1489 | r_a_tov = ntohl(flp->fl_csp.sp_r_a_tov); | |
1490 | e_d_tov = ntohl(flp->fl_csp.sp_e_d_tov); | |
1491 | if (csp_flags & FC_SP_FT_EDTR) | |
1492 | e_d_tov /= 1000000; | |
db36c06c CL |
1493 | |
1494 | lport->npiv_enabled = !!(csp_flags & FC_SP_FT_NPIV_ACC); | |
1495 | ||
42e9a92f RL |
1496 | if ((csp_flags & FC_SP_FT_FPORT) == 0) { |
1497 | if (e_d_tov > lport->e_d_tov) | |
1498 | lport->e_d_tov = e_d_tov; | |
1499 | lport->r_a_tov = 2 * e_d_tov; | |
093bb6a2 | 1500 | fc_lport_set_port_id(lport, did, fp); |
e6d8a1b0 | 1501 | printk(KERN_INFO "host%d: libfc: " |
ce8b5df0 | 1502 | "Port (%6.6x) entered " |
e6d8a1b0 JE |
1503 | "point-to-point mode\n", |
1504 | lport->host->host_no, did); | |
42e9a92f RL |
1505 | fc_lport_ptp_setup(lport, ntoh24(fh->fh_s_id), |
1506 | get_unaligned_be64( | |
1507 | &flp->fl_wwpn), | |
1508 | get_unaligned_be64( | |
1509 | &flp->fl_wwnn)); | |
1510 | } else { | |
1511 | lport->e_d_tov = e_d_tov; | |
1512 | lport->r_a_tov = r_a_tov; | |
1513 | fc_host_fabric_name(lport->host) = | |
1514 | get_unaligned_be64(&flp->fl_wwnn); | |
093bb6a2 | 1515 | fc_lport_set_port_id(lport, did, fp); |
42e9a92f RL |
1516 | fc_lport_enter_dns(lport); |
1517 | } | |
1518 | } | |
42e9a92f | 1519 | } else { |
7414705e | 1520 | FC_LPORT_DBG(lport, "Bad FLOGI response\n"); |
42e9a92f RL |
1521 | } |
1522 | ||
1523 | out: | |
1524 | fc_frame_free(fp); | |
1525 | err: | |
1526 | mutex_unlock(&lport->lp_mutex); | |
1527 | } | |
11b56188 | 1528 | EXPORT_SYMBOL(fc_lport_flogi_resp); |
42e9a92f RL |
1529 | |
1530 | /** | |
34f42a07 | 1531 | * fc_rport_enter_flogi() - Send a FLOGI request to the fabric manager |
42e9a92f RL |
1532 | * @lport: Fibre Channel local port to be logged in to the fabric |
1533 | * | |
1534 | * Locking Note: The lport lock is expected to be held before calling | |
1535 | * this routine. | |
1536 | */ | |
1537 | void fc_lport_enter_flogi(struct fc_lport *lport) | |
1538 | { | |
1539 | struct fc_frame *fp; | |
1540 | ||
7414705e RL |
1541 | FC_LPORT_DBG(lport, "Entered FLOGI state from %s state\n", |
1542 | fc_lport_state(lport)); | |
42e9a92f RL |
1543 | |
1544 | fc_lport_state_enter(lport, LPORT_ST_FLOGI); | |
1545 | ||
1546 | fp = fc_frame_alloc(lport, sizeof(struct fc_els_flogi)); | |
1547 | if (!fp) | |
1548 | return fc_lport_error(lport, fp); | |
1549 | ||
db36c06c CL |
1550 | if (!lport->tt.elsct_send(lport, FC_FID_FLOGI, fp, |
1551 | lport->vport ? ELS_FDISC : ELS_FLOGI, | |
b94f8951 JE |
1552 | fc_lport_flogi_resp, lport, |
1553 | lport->vport ? 2 * lport->r_a_tov : | |
1554 | lport->e_d_tov)) | |
8f550f93 | 1555 | fc_lport_error(lport, NULL); |
42e9a92f RL |
1556 | } |
1557 | ||
3a3b42bf RL |
1558 | /** |
1559 | * fc_lport_config() - Configure a fc_lport | |
1560 | * @lport: The local port to be configured | |
1561 | */ | |
42e9a92f RL |
1562 | int fc_lport_config(struct fc_lport *lport) |
1563 | { | |
1564 | INIT_DELAYED_WORK(&lport->retry_work, fc_lport_timeout); | |
1565 | mutex_init(&lport->lp_mutex); | |
1566 | ||
b1d9fd55 | 1567 | fc_lport_state_enter(lport, LPORT_ST_DISABLED); |
42e9a92f RL |
1568 | |
1569 | fc_lport_add_fc4_type(lport, FC_TYPE_FCP); | |
1570 | fc_lport_add_fc4_type(lport, FC_TYPE_CT); | |
1571 | ||
1572 | return 0; | |
1573 | } | |
1574 | EXPORT_SYMBOL(fc_lport_config); | |
1575 | ||
3a3b42bf RL |
1576 | /** |
1577 | * fc_lport_init() - Initialize the lport layer for a local port | |
1578 | * @lport: The local port to initialize the exchange layer for | |
1579 | */ | |
42e9a92f RL |
1580 | int fc_lport_init(struct fc_lport *lport) |
1581 | { | |
1582 | if (!lport->tt.lport_recv) | |
1583 | lport->tt.lport_recv = fc_lport_recv_req; | |
1584 | ||
1585 | if (!lport->tt.lport_reset) | |
1586 | lport->tt.lport_reset = fc_lport_reset; | |
1587 | ||
1588 | fc_host_port_type(lport->host) = FC_PORTTYPE_NPORT; | |
1589 | fc_host_node_name(lport->host) = lport->wwnn; | |
1590 | fc_host_port_name(lport->host) = lport->wwpn; | |
1591 | fc_host_supported_classes(lport->host) = FC_COS_CLASS3; | |
1592 | memset(fc_host_supported_fc4s(lport->host), 0, | |
1593 | sizeof(fc_host_supported_fc4s(lport->host))); | |
1594 | fc_host_supported_fc4s(lport->host)[2] = 1; | |
1595 | fc_host_supported_fc4s(lport->host)[7] = 1; | |
1596 | ||
1597 | /* This value is also unchanging */ | |
1598 | memset(fc_host_active_fc4s(lport->host), 0, | |
1599 | sizeof(fc_host_active_fc4s(lport->host))); | |
1600 | fc_host_active_fc4s(lport->host)[2] = 1; | |
1601 | fc_host_active_fc4s(lport->host)[7] = 1; | |
1602 | fc_host_maxframe_size(lport->host) = lport->mfs; | |
1603 | fc_host_supported_speeds(lport->host) = 0; | |
1604 | if (lport->link_supported_speeds & FC_PORTSPEED_1GBIT) | |
1605 | fc_host_supported_speeds(lport->host) |= FC_PORTSPEED_1GBIT; | |
1606 | if (lport->link_supported_speeds & FC_PORTSPEED_10GBIT) | |
1607 | fc_host_supported_speeds(lport->host) |= FC_PORTSPEED_10GBIT; | |
1608 | ||
1609 | return 0; | |
1610 | } | |
1611 | EXPORT_SYMBOL(fc_lport_init); | |
a51ab396 SM |
1612 | |
1613 | /** | |
3a3b42bf RL |
1614 | * fc_lport_bsg_resp() - The common response handler for FC Passthrough requests |
1615 | * @sp: The sequence for the FC Passthrough response | |
1616 | * @fp: The response frame | |
1617 | * @info_arg: The BSG info that the response is for | |
a51ab396 SM |
1618 | */ |
1619 | static void fc_lport_bsg_resp(struct fc_seq *sp, struct fc_frame *fp, | |
1620 | void *info_arg) | |
1621 | { | |
1622 | struct fc_bsg_info *info = info_arg; | |
1623 | struct fc_bsg_job *job = info->job; | |
1624 | struct fc_lport *lport = info->lport; | |
1625 | struct fc_frame_header *fh; | |
1626 | size_t len; | |
1627 | void *buf; | |
1628 | ||
1629 | if (IS_ERR(fp)) { | |
1630 | job->reply->result = (PTR_ERR(fp) == -FC_EX_CLOSED) ? | |
1631 | -ECONNABORTED : -ETIMEDOUT; | |
1632 | job->reply_len = sizeof(uint32_t); | |
1633 | job->state_flags |= FC_RQST_STATE_DONE; | |
1634 | job->job_done(job); | |
1635 | kfree(info); | |
1636 | return; | |
1637 | } | |
1638 | ||
1639 | mutex_lock(&lport->lp_mutex); | |
1640 | fh = fc_frame_header_get(fp); | |
1641 | len = fr_len(fp) - sizeof(*fh); | |
1642 | buf = fc_frame_payload_get(fp, 0); | |
1643 | ||
1644 | if (fr_sof(fp) == FC_SOF_I3 && !ntohs(fh->fh_seq_cnt)) { | |
1645 | /* Get the response code from the first frame payload */ | |
1646 | unsigned short cmd = (info->rsp_code == FC_FS_ACC) ? | |
1647 | ntohs(((struct fc_ct_hdr *)buf)->ct_cmd) : | |
1648 | (unsigned short)fc_frame_payload_op(fp); | |
1649 | ||
1650 | /* Save the reply status of the job */ | |
1651 | job->reply->reply_data.ctels_reply.status = | |
1652 | (cmd == info->rsp_code) ? | |
1653 | FC_CTELS_STATUS_OK : FC_CTELS_STATUS_REJECT; | |
1654 | } | |
1655 | ||
1656 | job->reply->reply_payload_rcv_len += | |
1657 | fc_copy_buffer_to_sglist(buf, len, info->sg, &info->nents, | |
1658 | &info->offset, KM_BIO_SRC_IRQ, NULL); | |
1659 | ||
1660 | if (fr_eof(fp) == FC_EOF_T && | |
1661 | (ntoh24(fh->fh_f_ctl) & (FC_FC_LAST_SEQ | FC_FC_END_SEQ)) == | |
1662 | (FC_FC_LAST_SEQ | FC_FC_END_SEQ)) { | |
1663 | if (job->reply->reply_payload_rcv_len > | |
1664 | job->reply_payload.payload_len) | |
1665 | job->reply->reply_payload_rcv_len = | |
1666 | job->reply_payload.payload_len; | |
1667 | job->reply->result = 0; | |
1668 | job->state_flags |= FC_RQST_STATE_DONE; | |
1669 | job->job_done(job); | |
1670 | kfree(info); | |
1671 | } | |
1672 | fc_frame_free(fp); | |
1673 | mutex_unlock(&lport->lp_mutex); | |
1674 | } | |
1675 | ||
1676 | /** | |
3a3b42bf RL |
1677 | * fc_lport_els_request() - Send ELS passthrough request |
1678 | * @job: The BSG Passthrough job | |
a51ab396 | 1679 | * @lport: The local port sending the request |
3a3b42bf | 1680 | * @did: The destination port id |
a51ab396 SM |
1681 | * |
1682 | * Locking Note: The lport lock is expected to be held before calling | |
1683 | * this routine. | |
1684 | */ | |
1685 | static int fc_lport_els_request(struct fc_bsg_job *job, | |
1686 | struct fc_lport *lport, | |
1687 | u32 did, u32 tov) | |
1688 | { | |
1689 | struct fc_bsg_info *info; | |
1690 | struct fc_frame *fp; | |
1691 | struct fc_frame_header *fh; | |
1692 | char *pp; | |
1693 | int len; | |
1694 | ||
70d919fb | 1695 | fp = fc_frame_alloc(lport, job->request_payload.payload_len); |
a51ab396 SM |
1696 | if (!fp) |
1697 | return -ENOMEM; | |
1698 | ||
1699 | len = job->request_payload.payload_len; | |
1700 | pp = fc_frame_payload_get(fp, len); | |
1701 | ||
1702 | sg_copy_to_buffer(job->request_payload.sg_list, | |
1703 | job->request_payload.sg_cnt, | |
1704 | pp, len); | |
1705 | ||
1706 | fh = fc_frame_header_get(fp); | |
1707 | fh->fh_r_ctl = FC_RCTL_ELS_REQ; | |
1708 | hton24(fh->fh_d_id, did); | |
1709 | hton24(fh->fh_s_id, fc_host_port_id(lport->host)); | |
1710 | fh->fh_type = FC_TYPE_ELS; | |
1711 | hton24(fh->fh_f_ctl, FC_FC_FIRST_SEQ | | |
1712 | FC_FC_END_SEQ | FC_FC_SEQ_INIT); | |
1713 | fh->fh_cs_ctl = 0; | |
1714 | fh->fh_df_ctl = 0; | |
1715 | fh->fh_parm_offset = 0; | |
1716 | ||
1717 | info = kzalloc(sizeof(struct fc_bsg_info), GFP_KERNEL); | |
1718 | if (!info) { | |
1719 | fc_frame_free(fp); | |
1720 | return -ENOMEM; | |
1721 | } | |
1722 | ||
1723 | info->job = job; | |
1724 | info->lport = lport; | |
1725 | info->rsp_code = ELS_LS_ACC; | |
1726 | info->nents = job->reply_payload.sg_cnt; | |
1727 | info->sg = job->reply_payload.sg_list; | |
1728 | ||
1729 | if (!lport->tt.exch_seq_send(lport, fp, fc_lport_bsg_resp, | |
1730 | NULL, info, tov)) | |
1731 | return -ECOMM; | |
1732 | return 0; | |
1733 | } | |
1734 | ||
1735 | /** | |
3a3b42bf RL |
1736 | * fc_lport_ct_request() - Send CT Passthrough request |
1737 | * @job: The BSG Passthrough job | |
a51ab396 SM |
1738 | * @lport: The local port sending the request |
1739 | * @did: The destination FC-ID | |
3a3b42bf | 1740 | * @tov: The timeout period to wait for the response |
a51ab396 SM |
1741 | * |
1742 | * Locking Note: The lport lock is expected to be held before calling | |
1743 | * this routine. | |
1744 | */ | |
1745 | static int fc_lport_ct_request(struct fc_bsg_job *job, | |
1746 | struct fc_lport *lport, u32 did, u32 tov) | |
1747 | { | |
1748 | struct fc_bsg_info *info; | |
1749 | struct fc_frame *fp; | |
1750 | struct fc_frame_header *fh; | |
1751 | struct fc_ct_req *ct; | |
1752 | size_t len; | |
1753 | ||
1754 | fp = fc_frame_alloc(lport, sizeof(struct fc_ct_hdr) + | |
1755 | job->request_payload.payload_len); | |
1756 | if (!fp) | |
1757 | return -ENOMEM; | |
1758 | ||
1759 | len = job->request_payload.payload_len; | |
1760 | ct = fc_frame_payload_get(fp, len); | |
1761 | ||
1762 | sg_copy_to_buffer(job->request_payload.sg_list, | |
1763 | job->request_payload.sg_cnt, | |
1764 | ct, len); | |
1765 | ||
1766 | fh = fc_frame_header_get(fp); | |
1767 | fh->fh_r_ctl = FC_RCTL_DD_UNSOL_CTL; | |
1768 | hton24(fh->fh_d_id, did); | |
1769 | hton24(fh->fh_s_id, fc_host_port_id(lport->host)); | |
1770 | fh->fh_type = FC_TYPE_CT; | |
1771 | hton24(fh->fh_f_ctl, FC_FC_FIRST_SEQ | | |
1772 | FC_FC_END_SEQ | FC_FC_SEQ_INIT); | |
1773 | fh->fh_cs_ctl = 0; | |
1774 | fh->fh_df_ctl = 0; | |
1775 | fh->fh_parm_offset = 0; | |
1776 | ||
1777 | info = kzalloc(sizeof(struct fc_bsg_info), GFP_KERNEL); | |
1778 | if (!info) { | |
1779 | fc_frame_free(fp); | |
1780 | return -ENOMEM; | |
1781 | } | |
1782 | ||
1783 | info->job = job; | |
1784 | info->lport = lport; | |
1785 | info->rsp_code = FC_FS_ACC; | |
1786 | info->nents = job->reply_payload.sg_cnt; | |
1787 | info->sg = job->reply_payload.sg_list; | |
1788 | ||
1789 | if (!lport->tt.exch_seq_send(lport, fp, fc_lport_bsg_resp, | |
1790 | NULL, info, tov)) | |
1791 | return -ECOMM; | |
1792 | return 0; | |
1793 | } | |
1794 | ||
1795 | /** | |
1796 | * fc_lport_bsg_request() - The common entry point for sending | |
3a3b42bf RL |
1797 | * FC Passthrough requests |
1798 | * @job: The BSG passthrough job | |
a51ab396 SM |
1799 | */ |
1800 | int fc_lport_bsg_request(struct fc_bsg_job *job) | |
1801 | { | |
1802 | struct request *rsp = job->req->next_rq; | |
1803 | struct Scsi_Host *shost = job->shost; | |
1804 | struct fc_lport *lport = shost_priv(shost); | |
1805 | struct fc_rport *rport; | |
1806 | struct fc_rport_priv *rdata; | |
1807 | int rc = -EINVAL; | |
1808 | u32 did; | |
1809 | ||
1810 | job->reply->reply_payload_rcv_len = 0; | |
b248df30 HD |
1811 | if (rsp) |
1812 | rsp->resid_len = job->reply_payload.payload_len; | |
a51ab396 SM |
1813 | |
1814 | mutex_lock(&lport->lp_mutex); | |
1815 | ||
1816 | switch (job->request->msgcode) { | |
1817 | case FC_BSG_RPT_ELS: | |
1818 | rport = job->rport; | |
1819 | if (!rport) | |
1820 | break; | |
1821 | ||
1822 | rdata = rport->dd_data; | |
1823 | rc = fc_lport_els_request(job, lport, rport->port_id, | |
1824 | rdata->e_d_tov); | |
1825 | break; | |
1826 | ||
1827 | case FC_BSG_RPT_CT: | |
1828 | rport = job->rport; | |
1829 | if (!rport) | |
1830 | break; | |
1831 | ||
1832 | rdata = rport->dd_data; | |
1833 | rc = fc_lport_ct_request(job, lport, rport->port_id, | |
1834 | rdata->e_d_tov); | |
1835 | break; | |
1836 | ||
1837 | case FC_BSG_HST_CT: | |
1838 | did = ntoh24(job->request->rqst_data.h_ct.port_id); | |
1839 | if (did == FC_FID_DIR_SERV) | |
3a3b42bf | 1840 | rdata = lport->dns_rdata; |
a51ab396 SM |
1841 | else |
1842 | rdata = lport->tt.rport_lookup(lport, did); | |
1843 | ||
1844 | if (!rdata) | |
1845 | break; | |
1846 | ||
1847 | rc = fc_lport_ct_request(job, lport, did, rdata->e_d_tov); | |
1848 | break; | |
1849 | ||
1850 | case FC_BSG_HST_ELS_NOLOGIN: | |
1851 | did = ntoh24(job->request->rqst_data.h_els.port_id); | |
1852 | rc = fc_lport_els_request(job, lport, did, lport->e_d_tov); | |
1853 | break; | |
1854 | } | |
1855 | ||
1856 | mutex_unlock(&lport->lp_mutex); | |
1857 | return rc; | |
1858 | } | |
1859 | EXPORT_SYMBOL(fc_lport_bsg_request); |