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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 | * | |
732bee7a | 35 | * HIERARCHY |
42e9a92f | 36 | * |
732bee7a | 37 | * The following hierarchy defines the locking rules. A greater lock |
42e9a92f | 38 | * may be held before acquiring a lesser lock, but a lesser lock should never |
732bee7a | 39 | * be held while attempting to acquire a greater lock. Here is the hierarchy- |
42e9a92f RL |
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 | |
25985edc | 55 | * callback handler because no other rport work in this queue can be executed |
42e9a92f RL |
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 |
25985edc | 166 | * @event: The event that occurred |
42e9a92f RL |
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_state() - Return the port state of the given Scsi_Host | |
248 | * @shost: The SCSI host whose port state is to be determined | |
249 | */ | |
42e9a92f RL |
250 | void fc_get_host_port_state(struct Scsi_Host *shost) |
251 | { | |
3a3b42bf | 252 | struct fc_lport *lport = shost_priv(shost); |
42e9a92f | 253 | |
3a3b42bf RL |
254 | mutex_lock(&lport->lp_mutex); |
255 | if (!lport->link_up) | |
8faecddb | 256 | fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN; |
42e9a92f | 257 | else |
3a3b42bf | 258 | switch (lport->state) { |
8faecddb CL |
259 | case LPORT_ST_READY: |
260 | fc_host_port_state(shost) = FC_PORTSTATE_ONLINE; | |
261 | break; | |
262 | default: | |
263 | fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE; | |
264 | } | |
3a3b42bf | 265 | mutex_unlock(&lport->lp_mutex); |
42e9a92f RL |
266 | } |
267 | EXPORT_SYMBOL(fc_get_host_port_state); | |
268 | ||
3a3b42bf RL |
269 | /** |
270 | * fc_get_host_speed() - Return the speed of the given Scsi_Host | |
271 | * @shost: The SCSI host whose port speed is to be determined | |
272 | */ | |
42e9a92f RL |
273 | void fc_get_host_speed(struct Scsi_Host *shost) |
274 | { | |
275 | struct fc_lport *lport = shost_priv(shost); | |
276 | ||
277 | fc_host_speed(shost) = lport->link_speed; | |
278 | } | |
279 | EXPORT_SYMBOL(fc_get_host_speed); | |
280 | ||
3a3b42bf RL |
281 | /** |
282 | * fc_get_host_stats() - Return the Scsi_Host's statistics | |
283 | * @shost: The SCSI host whose statistics are to be returned | |
284 | */ | |
42e9a92f RL |
285 | struct fc_host_statistics *fc_get_host_stats(struct Scsi_Host *shost) |
286 | { | |
42e9a92f | 287 | struct fc_host_statistics *fcoe_stats; |
3a3b42bf | 288 | struct fc_lport *lport = shost_priv(shost); |
42e9a92f | 289 | struct timespec v0, v1; |
582b45bc | 290 | unsigned int cpu; |
5f0e385f JE |
291 | u64 fcp_in_bytes = 0; |
292 | u64 fcp_out_bytes = 0; | |
42e9a92f | 293 | |
3a3b42bf | 294 | fcoe_stats = &lport->host_stats; |
42e9a92f RL |
295 | memset(fcoe_stats, 0, sizeof(struct fc_host_statistics)); |
296 | ||
297 | jiffies_to_timespec(jiffies, &v0); | |
3a3b42bf | 298 | jiffies_to_timespec(lport->boot_time, &v1); |
42e9a92f RL |
299 | fcoe_stats->seconds_since_last_reset = (v0.tv_sec - v1.tv_sec); |
300 | ||
582b45bc RL |
301 | for_each_possible_cpu(cpu) { |
302 | struct fcoe_dev_stats *stats; | |
303 | ||
3a3b42bf | 304 | stats = per_cpu_ptr(lport->dev_stats, cpu); |
582b45bc | 305 | |
42e9a92f RL |
306 | fcoe_stats->tx_frames += stats->TxFrames; |
307 | fcoe_stats->tx_words += stats->TxWords; | |
308 | fcoe_stats->rx_frames += stats->RxFrames; | |
309 | fcoe_stats->rx_words += stats->RxWords; | |
310 | fcoe_stats->error_frames += stats->ErrorFrames; | |
311 | fcoe_stats->invalid_crc_count += stats->InvalidCRCCount; | |
312 | fcoe_stats->fcp_input_requests += stats->InputRequests; | |
313 | fcoe_stats->fcp_output_requests += stats->OutputRequests; | |
314 | fcoe_stats->fcp_control_requests += stats->ControlRequests; | |
5f0e385f JE |
315 | fcp_in_bytes += stats->InputBytes; |
316 | fcp_out_bytes += stats->OutputBytes; | |
42e9a92f RL |
317 | fcoe_stats->link_failure_count += stats->LinkFailureCount; |
318 | } | |
5f0e385f JE |
319 | fcoe_stats->fcp_input_megabytes = div_u64(fcp_in_bytes, 1000000); |
320 | fcoe_stats->fcp_output_megabytes = div_u64(fcp_out_bytes, 1000000); | |
42e9a92f RL |
321 | fcoe_stats->lip_count = -1; |
322 | fcoe_stats->nos_count = -1; | |
323 | fcoe_stats->loss_of_sync_count = -1; | |
324 | fcoe_stats->loss_of_signal_count = -1; | |
325 | fcoe_stats->prim_seq_protocol_err_count = -1; | |
326 | fcoe_stats->dumped_frames = -1; | |
327 | return fcoe_stats; | |
328 | } | |
329 | EXPORT_SYMBOL(fc_get_host_stats); | |
330 | ||
3a3b42bf RL |
331 | /** |
332 | * fc_lport_flogi_fill() - Fill in FLOGI command for request | |
333 | * @lport: The local port the FLOGI is for | |
334 | * @flogi: The FLOGI command | |
335 | * @op: The opcode | |
42e9a92f | 336 | */ |
3a3b42bf RL |
337 | static void fc_lport_flogi_fill(struct fc_lport *lport, |
338 | struct fc_els_flogi *flogi, | |
339 | unsigned int op) | |
42e9a92f RL |
340 | { |
341 | struct fc_els_csp *sp; | |
342 | struct fc_els_cssp *cp; | |
343 | ||
344 | memset(flogi, 0, sizeof(*flogi)); | |
345 | flogi->fl_cmd = (u8) op; | |
346 | put_unaligned_be64(lport->wwpn, &flogi->fl_wwpn); | |
347 | put_unaligned_be64(lport->wwnn, &flogi->fl_wwnn); | |
348 | sp = &flogi->fl_csp; | |
349 | sp->sp_hi_ver = 0x20; | |
350 | sp->sp_lo_ver = 0x20; | |
351 | sp->sp_bb_cred = htons(10); /* this gets set by gateway */ | |
352 | sp->sp_bb_data = htons((u16) lport->mfs); | |
353 | cp = &flogi->fl_cssp[3 - 1]; /* class 3 parameters */ | |
354 | cp->cp_class = htons(FC_CPC_VALID | FC_CPC_SEQ); | |
355 | if (op != ELS_FLOGI) { | |
356 | sp->sp_features = htons(FC_SP_FT_CIRO); | |
357 | sp->sp_tot_seq = htons(255); /* seq. we accept */ | |
358 | sp->sp_rel_off = htons(0x1f); | |
359 | sp->sp_e_d_tov = htonl(lport->e_d_tov); | |
360 | ||
361 | cp->cp_rdfs = htons((u16) lport->mfs); | |
362 | cp->cp_con_seq = htons(255); | |
363 | cp->cp_open_seq = 1; | |
364 | } | |
365 | } | |
366 | ||
3a3b42bf RL |
367 | /** |
368 | * fc_lport_add_fc4_type() - Add a supported FC-4 type to a local port | |
369 | * @lport: The local port to add a new FC-4 type to | |
370 | * @type: The new FC-4 type | |
42e9a92f RL |
371 | */ |
372 | static void fc_lport_add_fc4_type(struct fc_lport *lport, enum fc_fh_type type) | |
373 | { | |
374 | __be32 *mp; | |
375 | ||
376 | mp = &lport->fcts.ff_type_map[type / FC_NS_BPW]; | |
377 | *mp = htonl(ntohl(*mp) | 1UL << (type % FC_NS_BPW)); | |
378 | } | |
379 | ||
380 | /** | |
34f42a07 | 381 | * fc_lport_recv_rlir_req() - Handle received Registered Link Incident Report. |
25985edc | 382 | * @lport: Fibre Channel local port receiving the RLIR |
92261156 | 383 | * @fp: The RLIR request frame |
42e9a92f | 384 | * |
1b69bc06 | 385 | * Locking Note: The lport lock is expected to be held before calling |
42e9a92f RL |
386 | * this function. |
387 | */ | |
92261156 | 388 | static void fc_lport_recv_rlir_req(struct fc_lport *lport, struct fc_frame *fp) |
42e9a92f | 389 | { |
7414705e RL |
390 | FC_LPORT_DBG(lport, "Received RLIR request while in state %s\n", |
391 | fc_lport_state(lport)); | |
42e9a92f | 392 | |
92261156 | 393 | lport->tt.seq_els_rsp_send(fp, ELS_LS_ACC, NULL); |
42e9a92f RL |
394 | fc_frame_free(fp); |
395 | } | |
396 | ||
397 | /** | |
34f42a07 | 398 | * fc_lport_recv_echo_req() - Handle received ECHO request |
25985edc | 399 | * @lport: The local port receiving the ECHO |
92261156 | 400 | * @fp: ECHO request frame |
42e9a92f | 401 | * |
1b69bc06 | 402 | * Locking Note: The lport lock is expected to be held before calling |
42e9a92f RL |
403 | * this function. |
404 | */ | |
92261156 JE |
405 | static void fc_lport_recv_echo_req(struct fc_lport *lport, |
406 | struct fc_frame *in_fp) | |
42e9a92f RL |
407 | { |
408 | struct fc_frame *fp; | |
42e9a92f RL |
409 | unsigned int len; |
410 | void *pp; | |
411 | void *dp; | |
42e9a92f | 412 | |
1b69bc06 | 413 | FC_LPORT_DBG(lport, "Received ECHO request while in state %s\n", |
7414705e | 414 | fc_lport_state(lport)); |
42e9a92f RL |
415 | |
416 | len = fr_len(in_fp) - sizeof(struct fc_frame_header); | |
417 | pp = fc_frame_payload_get(in_fp, len); | |
418 | ||
419 | if (len < sizeof(__be32)) | |
420 | len = sizeof(__be32); | |
421 | ||
422 | fp = fc_frame_alloc(lport, len); | |
423 | if (fp) { | |
424 | dp = fc_frame_payload_get(fp, len); | |
425 | memcpy(dp, pp, len); | |
1b69bc06 | 426 | *((__be32 *)dp) = htonl(ELS_LS_ACC << 24); |
24f089e2 JE |
427 | fc_fill_reply_hdr(fp, in_fp, FC_RCTL_ELS_REP, 0); |
428 | lport->tt.frame_send(lport, fp); | |
42e9a92f RL |
429 | } |
430 | fc_frame_free(in_fp); | |
431 | } | |
432 | ||
433 | /** | |
1b69bc06 | 434 | * fc_lport_recv_rnid_req() - Handle received Request Node ID data request |
25985edc | 435 | * @lport: The local port receiving the RNID |
92261156 | 436 | * @fp: The RNID request frame |
42e9a92f | 437 | * |
1b69bc06 | 438 | * Locking Note: The lport lock is expected to be held before calling |
42e9a92f RL |
439 | * this function. |
440 | */ | |
92261156 JE |
441 | static void fc_lport_recv_rnid_req(struct fc_lport *lport, |
442 | struct fc_frame *in_fp) | |
42e9a92f RL |
443 | { |
444 | struct fc_frame *fp; | |
42e9a92f RL |
445 | struct fc_els_rnid *req; |
446 | struct { | |
447 | struct fc_els_rnid_resp rnid; | |
448 | struct fc_els_rnid_cid cid; | |
449 | struct fc_els_rnid_gen gen; | |
450 | } *rp; | |
451 | struct fc_seq_els_data rjt_data; | |
452 | u8 fmt; | |
453 | size_t len; | |
42e9a92f | 454 | |
7414705e RL |
455 | FC_LPORT_DBG(lport, "Received RNID request while in state %s\n", |
456 | fc_lport_state(lport)); | |
42e9a92f RL |
457 | |
458 | req = fc_frame_payload_get(in_fp, sizeof(*req)); | |
459 | if (!req) { | |
42e9a92f RL |
460 | rjt_data.reason = ELS_RJT_LOGIC; |
461 | rjt_data.explan = ELS_EXPL_NONE; | |
92261156 | 462 | lport->tt.seq_els_rsp_send(in_fp, ELS_LS_RJT, &rjt_data); |
42e9a92f RL |
463 | } else { |
464 | fmt = req->rnid_fmt; | |
465 | len = sizeof(*rp); | |
466 | if (fmt != ELS_RNIDF_GEN || | |
467 | ntohl(lport->rnid_gen.rnid_atype) == 0) { | |
468 | fmt = ELS_RNIDF_NONE; /* nothing to provide */ | |
469 | len -= sizeof(rp->gen); | |
470 | } | |
471 | fp = fc_frame_alloc(lport, len); | |
472 | if (fp) { | |
473 | rp = fc_frame_payload_get(fp, len); | |
474 | memset(rp, 0, len); | |
475 | rp->rnid.rnid_cmd = ELS_LS_ACC; | |
476 | rp->rnid.rnid_fmt = fmt; | |
477 | rp->rnid.rnid_cid_len = sizeof(rp->cid); | |
478 | rp->cid.rnid_wwpn = htonll(lport->wwpn); | |
479 | rp->cid.rnid_wwnn = htonll(lport->wwnn); | |
480 | if (fmt == ELS_RNIDF_GEN) { | |
481 | rp->rnid.rnid_sid_len = sizeof(rp->gen); | |
482 | memcpy(&rp->gen, &lport->rnid_gen, | |
483 | sizeof(rp->gen)); | |
484 | } | |
24f089e2 JE |
485 | fc_fill_reply_hdr(fp, in_fp, FC_RCTL_ELS_REP, 0); |
486 | lport->tt.frame_send(lport, fp); | |
42e9a92f RL |
487 | } |
488 | } | |
489 | fc_frame_free(in_fp); | |
490 | } | |
491 | ||
42e9a92f | 492 | /** |
34f42a07 | 493 | * fc_lport_recv_logo_req() - Handle received fabric LOGO request |
25985edc | 494 | * @lport: The local port receiving the LOGO |
92261156 | 495 | * @fp: The LOGO request frame |
42e9a92f RL |
496 | * |
497 | * Locking Note: The lport lock is exected to be held before calling | |
498 | * this function. | |
499 | */ | |
92261156 | 500 | static void fc_lport_recv_logo_req(struct fc_lport *lport, struct fc_frame *fp) |
42e9a92f | 501 | { |
92261156 | 502 | lport->tt.seq_els_rsp_send(fp, ELS_LS_ACC, NULL); |
42e9a92f RL |
503 | fc_lport_enter_reset(lport); |
504 | fc_frame_free(fp); | |
505 | } | |
506 | ||
507 | /** | |
34f42a07 | 508 | * fc_fabric_login() - Start the lport state machine |
3a3b42bf | 509 | * @lport: The local port that should log into the fabric |
42e9a92f RL |
510 | * |
511 | * Locking Note: This function should not be called | |
512 | * with the lport lock held. | |
513 | */ | |
514 | int fc_fabric_login(struct fc_lport *lport) | |
515 | { | |
516 | int rc = -1; | |
517 | ||
518 | mutex_lock(&lport->lp_mutex); | |
55a66d3c VD |
519 | if (lport->state == LPORT_ST_DISABLED || |
520 | lport->state == LPORT_ST_LOGO) { | |
521 | fc_lport_state_enter(lport, LPORT_ST_RESET); | |
42e9a92f RL |
522 | fc_lport_enter_reset(lport); |
523 | rc = 0; | |
524 | } | |
525 | mutex_unlock(&lport->lp_mutex); | |
526 | ||
527 | return rc; | |
528 | } | |
529 | EXPORT_SYMBOL(fc_fabric_login); | |
530 | ||
531 | /** | |
8faecddb | 532 | * __fc_linkup() - Handler for transport linkup events |
42e9a92f | 533 | * @lport: The lport whose link is up |
8faecddb CL |
534 | * |
535 | * Locking: must be called with the lp_mutex held | |
42e9a92f | 536 | */ |
8faecddb | 537 | void __fc_linkup(struct fc_lport *lport) |
42e9a92f | 538 | { |
bc0e17f6 VD |
539 | if (!lport->link_up) { |
540 | lport->link_up = 1; | |
42e9a92f RL |
541 | |
542 | if (lport->state == LPORT_ST_RESET) | |
543 | fc_lport_enter_flogi(lport); | |
544 | } | |
8faecddb CL |
545 | } |
546 | ||
547 | /** | |
548 | * fc_linkup() - Handler for transport linkup events | |
3a3b42bf | 549 | * @lport: The local port whose link is up |
8faecddb CL |
550 | */ |
551 | void fc_linkup(struct fc_lport *lport) | |
552 | { | |
ce8b5df0 | 553 | printk(KERN_INFO "host%d: libfc: Link up on port (%6.6x)\n", |
7b2787ec | 554 | lport->host->host_no, lport->port_id); |
8faecddb CL |
555 | |
556 | mutex_lock(&lport->lp_mutex); | |
557 | __fc_linkup(lport); | |
42e9a92f RL |
558 | mutex_unlock(&lport->lp_mutex); |
559 | } | |
560 | EXPORT_SYMBOL(fc_linkup); | |
561 | ||
562 | /** | |
8faecddb | 563 | * __fc_linkdown() - Handler for transport linkdown events |
42e9a92f | 564 | * @lport: The lport whose link is down |
8faecddb CL |
565 | * |
566 | * Locking: must be called with the lp_mutex held | |
42e9a92f | 567 | */ |
8faecddb | 568 | void __fc_linkdown(struct fc_lport *lport) |
42e9a92f | 569 | { |
bc0e17f6 VD |
570 | if (lport->link_up) { |
571 | lport->link_up = 0; | |
42e9a92f RL |
572 | fc_lport_enter_reset(lport); |
573 | lport->tt.fcp_cleanup(lport); | |
574 | } | |
8faecddb CL |
575 | } |
576 | ||
577 | /** | |
578 | * fc_linkdown() - Handler for transport linkdown events | |
3a3b42bf | 579 | * @lport: The local port whose link is down |
8faecddb CL |
580 | */ |
581 | void fc_linkdown(struct fc_lport *lport) | |
582 | { | |
ce8b5df0 | 583 | printk(KERN_INFO "host%d: libfc: Link down on port (%6.6x)\n", |
7b2787ec | 584 | lport->host->host_no, lport->port_id); |
8faecddb CL |
585 | |
586 | mutex_lock(&lport->lp_mutex); | |
587 | __fc_linkdown(lport); | |
42e9a92f RL |
588 | mutex_unlock(&lport->lp_mutex); |
589 | } | |
590 | EXPORT_SYMBOL(fc_linkdown); | |
591 | ||
42e9a92f | 592 | /** |
34f42a07 | 593 | * fc_fabric_logoff() - Logout of the fabric |
3a3b42bf | 594 | * @lport: The local port to logoff the fabric |
42e9a92f RL |
595 | * |
596 | * Return value: | |
597 | * 0 for success, -1 for failure | |
34f42a07 | 598 | */ |
42e9a92f RL |
599 | int fc_fabric_logoff(struct fc_lport *lport) |
600 | { | |
601 | lport->tt.disc_stop_final(lport); | |
602 | mutex_lock(&lport->lp_mutex); | |
3a3b42bf RL |
603 | if (lport->dns_rdata) |
604 | lport->tt.rport_logoff(lport->dns_rdata); | |
a0fd2e49 AJ |
605 | mutex_unlock(&lport->lp_mutex); |
606 | lport->tt.rport_flush_queue(); | |
607 | mutex_lock(&lport->lp_mutex); | |
42e9a92f RL |
608 | fc_lport_enter_logo(lport); |
609 | mutex_unlock(&lport->lp_mutex); | |
f7db2c15 | 610 | cancel_delayed_work_sync(&lport->retry_work); |
42e9a92f RL |
611 | return 0; |
612 | } | |
613 | EXPORT_SYMBOL(fc_fabric_logoff); | |
614 | ||
615 | /** | |
3a3b42bf RL |
616 | * fc_lport_destroy() - Unregister a fc_lport |
617 | * @lport: The local port to unregister | |
42e9a92f | 618 | * |
42e9a92f RL |
619 | * Note: |
620 | * exit routine for fc_lport instance | |
621 | * clean-up all the allocated memory | |
622 | * and free up other system resources. | |
623 | * | |
34f42a07 | 624 | */ |
42e9a92f RL |
625 | int fc_lport_destroy(struct fc_lport *lport) |
626 | { | |
bbf15669 | 627 | mutex_lock(&lport->lp_mutex); |
b1d9fd55 | 628 | lport->state = LPORT_ST_DISABLED; |
bbf15669 | 629 | lport->link_up = 0; |
42e9a92f | 630 | lport->tt.frame_send = fc_frame_drop; |
bbf15669 AJ |
631 | mutex_unlock(&lport->lp_mutex); |
632 | ||
42e9a92f | 633 | lport->tt.fcp_abort_io(lport); |
e9ba8b42 | 634 | lport->tt.disc_stop_final(lport); |
1f6ff364 | 635 | lport->tt.exch_mgr_reset(lport, 0, 0); |
70d53b04 | 636 | fc_fc4_del_lport(lport); |
42e9a92f RL |
637 | return 0; |
638 | } | |
639 | EXPORT_SYMBOL(fc_lport_destroy); | |
640 | ||
641 | /** | |
3a3b42bf RL |
642 | * fc_set_mfs() - Set the maximum frame size for a local port |
643 | * @lport: The local port to set the MFS for | |
644 | * @mfs: The new MFS | |
34f42a07 | 645 | */ |
42e9a92f RL |
646 | int fc_set_mfs(struct fc_lport *lport, u32 mfs) |
647 | { | |
648 | unsigned int old_mfs; | |
649 | int rc = -EINVAL; | |
650 | ||
651 | mutex_lock(&lport->lp_mutex); | |
652 | ||
653 | old_mfs = lport->mfs; | |
654 | ||
655 | if (mfs >= FC_MIN_MAX_FRAME) { | |
656 | mfs &= ~3; | |
657 | if (mfs > FC_MAX_FRAME) | |
658 | mfs = FC_MAX_FRAME; | |
659 | mfs -= sizeof(struct fc_frame_header); | |
660 | lport->mfs = mfs; | |
661 | rc = 0; | |
662 | } | |
663 | ||
664 | if (!rc && mfs < old_mfs) | |
665 | fc_lport_enter_reset(lport); | |
666 | ||
667 | mutex_unlock(&lport->lp_mutex); | |
668 | ||
669 | return rc; | |
670 | } | |
671 | EXPORT_SYMBOL(fc_set_mfs); | |
672 | ||
673 | /** | |
34f42a07 | 674 | * fc_lport_disc_callback() - Callback for discovery events |
3a3b42bf | 675 | * @lport: The local port receiving the event |
42e9a92f RL |
676 | * @event: The discovery event |
677 | */ | |
678 | void fc_lport_disc_callback(struct fc_lport *lport, enum fc_disc_event event) | |
679 | { | |
680 | switch (event) { | |
681 | case DISC_EV_SUCCESS: | |
7414705e | 682 | FC_LPORT_DBG(lport, "Discovery succeeded\n"); |
42e9a92f RL |
683 | break; |
684 | case DISC_EV_FAILED: | |
e6d8a1b0 | 685 | printk(KERN_ERR "host%d: libfc: " |
ce8b5df0 | 686 | "Discovery failed for port (%6.6x)\n", |
7b2787ec | 687 | lport->host->host_no, lport->port_id); |
42e9a92f RL |
688 | mutex_lock(&lport->lp_mutex); |
689 | fc_lport_enter_reset(lport); | |
690 | mutex_unlock(&lport->lp_mutex); | |
691 | break; | |
692 | case DISC_EV_NONE: | |
693 | WARN_ON(1); | |
694 | break; | |
695 | } | |
696 | } | |
697 | ||
698 | /** | |
34f42a07 | 699 | * fc_rport_enter_ready() - Enter the ready state and start discovery |
3a3b42bf | 700 | * @lport: The local port that is ready |
42e9a92f RL |
701 | * |
702 | * Locking Note: The lport lock is expected to be held before calling | |
703 | * this routine. | |
704 | */ | |
705 | static void fc_lport_enter_ready(struct fc_lport *lport) | |
706 | { | |
7414705e RL |
707 | FC_LPORT_DBG(lport, "Entered READY from state %s\n", |
708 | fc_lport_state(lport)); | |
42e9a92f RL |
709 | |
710 | fc_lport_state_enter(lport, LPORT_ST_READY); | |
8faecddb CL |
711 | if (lport->vport) |
712 | fc_vport_set_state(lport->vport, FC_VPORT_ACTIVE); | |
713 | fc_vports_linkchange(lport); | |
42e9a92f | 714 | |
3a3b42bf | 715 | if (!lport->ptp_rdata) |
29d898e9 | 716 | lport->tt.disc_start(fc_lport_disc_callback, lport); |
42e9a92f RL |
717 | } |
718 | ||
093bb6a2 JE |
719 | /** |
720 | * fc_lport_set_port_id() - set the local port Port ID | |
721 | * @lport: The local port which will have its Port ID set. | |
722 | * @port_id: The new port ID. | |
723 | * @fp: The frame containing the incoming request, or NULL. | |
724 | * | |
725 | * Locking Note: The lport lock is expected to be held before calling | |
726 | * this function. | |
727 | */ | |
728 | static void fc_lport_set_port_id(struct fc_lport *lport, u32 port_id, | |
729 | struct fc_frame *fp) | |
730 | { | |
731 | if (port_id) | |
ce8b5df0 | 732 | printk(KERN_INFO "host%d: Assigned Port ID %6.6x\n", |
093bb6a2 JE |
733 | lport->host->host_no, port_id); |
734 | ||
7b2787ec RL |
735 | lport->port_id = port_id; |
736 | ||
737 | /* Update the fc_host */ | |
093bb6a2 | 738 | fc_host_port_id(lport->host) = port_id; |
7b2787ec | 739 | |
093bb6a2 JE |
740 | if (lport->tt.lport_set_port_id) |
741 | lport->tt.lport_set_port_id(lport, port_id, fp); | |
742 | } | |
743 | ||
3726f358 JE |
744 | /** |
745 | * fc_lport_set_port_id() - set the local port Port ID for point-to-multipoint | |
746 | * @lport: The local port which will have its Port ID set. | |
747 | * @port_id: The new port ID. | |
748 | * | |
749 | * Called by the lower-level driver when transport sets the local port_id. | |
750 | * This is used in VN_port to VN_port mode for FCoE, and causes FLOGI and | |
751 | * discovery to be skipped. | |
752 | */ | |
753 | void fc_lport_set_local_id(struct fc_lport *lport, u32 port_id) | |
754 | { | |
755 | mutex_lock(&lport->lp_mutex); | |
756 | ||
757 | fc_lport_set_port_id(lport, port_id, NULL); | |
758 | ||
759 | switch (lport->state) { | |
760 | case LPORT_ST_RESET: | |
761 | case LPORT_ST_FLOGI: | |
762 | if (port_id) | |
763 | fc_lport_enter_ready(lport); | |
764 | break; | |
765 | default: | |
766 | break; | |
767 | } | |
768 | mutex_unlock(&lport->lp_mutex); | |
769 | } | |
770 | EXPORT_SYMBOL(fc_lport_set_local_id); | |
771 | ||
42e9a92f | 772 | /** |
34f42a07 | 773 | * fc_lport_recv_flogi_req() - Receive a FLOGI request |
25985edc | 774 | * @lport: The local port that received the request |
92261156 | 775 | * @rx_fp: The FLOGI frame |
42e9a92f RL |
776 | * |
777 | * A received FLOGI request indicates a point-to-point connection. | |
778 | * Accept it with the common service parameters indicating our N port. | |
779 | * Set up to do a PLOGI if we have the higher-number WWPN. | |
780 | * | |
1b69bc06 | 781 | * Locking Note: The lport lock is expected to be held before calling |
42e9a92f RL |
782 | * this function. |
783 | */ | |
92261156 JE |
784 | static void fc_lport_recv_flogi_req(struct fc_lport *lport, |
785 | struct fc_frame *rx_fp) | |
42e9a92f RL |
786 | { |
787 | struct fc_frame *fp; | |
24f089e2 | 788 | struct fc_frame_header *fh; |
42e9a92f RL |
789 | struct fc_els_flogi *flp; |
790 | struct fc_els_flogi *new_flp; | |
791 | u64 remote_wwpn; | |
792 | u32 remote_fid; | |
793 | u32 local_fid; | |
42e9a92f | 794 | |
7414705e RL |
795 | FC_LPORT_DBG(lport, "Received FLOGI request while in state %s\n", |
796 | fc_lport_state(lport)); | |
42e9a92f | 797 | |
251748a9 | 798 | remote_fid = fc_frame_sid(rx_fp); |
42e9a92f RL |
799 | flp = fc_frame_payload_get(rx_fp, sizeof(*flp)); |
800 | if (!flp) | |
801 | goto out; | |
802 | remote_wwpn = get_unaligned_be64(&flp->fl_wwpn); | |
803 | if (remote_wwpn == lport->wwpn) { | |
e6d8a1b0 | 804 | printk(KERN_WARNING "host%d: libfc: Received FLOGI from port " |
9f8f3aa6 | 805 | "with same WWPN %16.16llx\n", |
e6d8a1b0 | 806 | lport->host->host_no, remote_wwpn); |
42e9a92f RL |
807 | goto out; |
808 | } | |
9f8f3aa6 | 809 | FC_LPORT_DBG(lport, "FLOGI from port WWPN %16.16llx\n", remote_wwpn); |
42e9a92f RL |
810 | |
811 | /* | |
812 | * XXX what is the right thing to do for FIDs? | |
813 | * The originator might expect our S_ID to be 0xfffffe. | |
814 | * But if so, both of us could end up with the same FID. | |
815 | */ | |
816 | local_fid = FC_LOCAL_PTP_FID_LO; | |
817 | if (remote_wwpn < lport->wwpn) { | |
818 | local_fid = FC_LOCAL_PTP_FID_HI; | |
819 | if (!remote_fid || remote_fid == local_fid) | |
820 | remote_fid = FC_LOCAL_PTP_FID_LO; | |
821 | } else if (!remote_fid) { | |
822 | remote_fid = FC_LOCAL_PTP_FID_HI; | |
823 | } | |
824 | ||
093bb6a2 | 825 | fc_lport_set_port_id(lport, local_fid, rx_fp); |
42e9a92f RL |
826 | |
827 | fp = fc_frame_alloc(lport, sizeof(*flp)); | |
828 | if (fp) { | |
42e9a92f RL |
829 | new_flp = fc_frame_payload_get(fp, sizeof(*flp)); |
830 | fc_lport_flogi_fill(lport, new_flp, ELS_FLOGI); | |
831 | new_flp->fl_cmd = (u8) ELS_LS_ACC; | |
832 | ||
833 | /* | |
834 | * Send the response. If this fails, the originator should | |
835 | * repeat the sequence. | |
836 | */ | |
24f089e2 JE |
837 | fc_fill_reply_hdr(fp, rx_fp, FC_RCTL_ELS_REP, 0); |
838 | fh = fc_frame_header_get(fp); | |
839 | hton24(fh->fh_s_id, local_fid); | |
840 | hton24(fh->fh_d_id, remote_fid); | |
841 | lport->tt.frame_send(lport, fp); | |
42e9a92f RL |
842 | |
843 | } else { | |
844 | fc_lport_error(lport, fp); | |
845 | } | |
846 | fc_lport_ptp_setup(lport, remote_fid, remote_wwpn, | |
847 | get_unaligned_be64(&flp->fl_wwnn)); | |
42e9a92f | 848 | out: |
42e9a92f RL |
849 | fc_frame_free(rx_fp); |
850 | } | |
851 | ||
852 | /** | |
96ad8464 | 853 | * fc_lport_recv_els_req() - The generic lport ELS request handler |
3a3b42bf | 854 | * @lport: The local port that received the request |
3a3b42bf | 855 | * @fp: The request frame |
42e9a92f RL |
856 | * |
857 | * This function will see if the lport handles the request or | |
858 | * if an rport should handle the request. | |
859 | * | |
860 | * Locking Note: This function should not be called with the lport | |
25985edc | 861 | * lock held because it will grab the lock. |
42e9a92f | 862 | */ |
96ad8464 JE |
863 | static void fc_lport_recv_els_req(struct fc_lport *lport, |
864 | struct fc_frame *fp) | |
42e9a92f | 865 | { |
92261156 | 866 | void (*recv)(struct fc_lport *, struct fc_frame *); |
42e9a92f RL |
867 | |
868 | mutex_lock(&lport->lp_mutex); | |
869 | ||
870 | /* | |
871 | * Handle special ELS cases like FLOGI, LOGO, and | |
872 | * RSCN here. These don't require a session. | |
873 | * Even if we had a session, it might not be ready. | |
874 | */ | |
e9ba8b42 JE |
875 | if (!lport->link_up) |
876 | fc_frame_free(fp); | |
96ad8464 | 877 | else { |
42e9a92f RL |
878 | /* |
879 | * Check opcode. | |
880 | */ | |
131203a1 | 881 | recv = lport->tt.rport_recv_req; |
42e9a92f RL |
882 | switch (fc_frame_payload_op(fp)) { |
883 | case ELS_FLOGI: | |
a7b12a27 JE |
884 | if (!lport->point_to_multipoint) |
885 | recv = fc_lport_recv_flogi_req; | |
42e9a92f RL |
886 | break; |
887 | case ELS_LOGO: | |
251748a9 | 888 | if (fc_frame_sid(fp) == FC_FID_FLOGI) |
42e9a92f RL |
889 | recv = fc_lport_recv_logo_req; |
890 | break; | |
891 | case ELS_RSCN: | |
892 | recv = lport->tt.disc_recv_req; | |
893 | break; | |
894 | case ELS_ECHO: | |
895 | recv = fc_lport_recv_echo_req; | |
896 | break; | |
897 | case ELS_RLIR: | |
898 | recv = fc_lport_recv_rlir_req; | |
899 | break; | |
900 | case ELS_RNID: | |
901 | recv = fc_lport_recv_rnid_req; | |
902 | break; | |
42e9a92f RL |
903 | } |
904 | ||
92261156 | 905 | recv(lport, fp); |
42e9a92f RL |
906 | } |
907 | mutex_unlock(&lport->lp_mutex); | |
42e9a92f RL |
908 | } |
909 | ||
96ad8464 JE |
910 | static int fc_lport_els_prli(struct fc_rport_priv *rdata, u32 spp_len, |
911 | const struct fc_els_spp *spp_in, | |
912 | struct fc_els_spp *spp_out) | |
913 | { | |
914 | return FC_SPP_RESP_INVL; | |
915 | } | |
916 | ||
917 | struct fc4_prov fc_lport_els_prov = { | |
918 | .prli = fc_lport_els_prli, | |
919 | .recv = fc_lport_recv_els_req, | |
920 | }; | |
921 | ||
922 | /** | |
923 | * fc_lport_recv_req() - The generic lport request handler | |
924 | * @lport: The lport that received the request | |
925 | * @fp: The frame the request is in | |
926 | * | |
927 | * Locking Note: This function should not be called with the lport | |
25985edc | 928 | * lock held because it may grab the lock. |
96ad8464 JE |
929 | */ |
930 | static void fc_lport_recv_req(struct fc_lport *lport, | |
931 | struct fc_frame *fp) | |
932 | { | |
933 | struct fc_frame_header *fh = fc_frame_header_get(fp); | |
934 | struct fc_seq *sp = fr_seq(fp); | |
935 | struct fc4_prov *prov; | |
936 | ||
937 | /* | |
938 | * Use RCU read lock and module_lock to be sure module doesn't | |
939 | * deregister and get unloaded while we're calling it. | |
940 | * try_module_get() is inlined and accepts a NULL parameter. | |
941 | * Only ELSes and FCP target ops should come through here. | |
942 | * The locking is unfortunate, and a better scheme is being sought. | |
943 | */ | |
944 | ||
945 | rcu_read_lock(); | |
946 | if (fh->fh_type >= FC_FC4_PROV_SIZE) | |
947 | goto drop; | |
948 | prov = rcu_dereference(fc_passive_prov[fh->fh_type]); | |
949 | if (!prov || !try_module_get(prov->module)) | |
950 | goto drop; | |
951 | rcu_read_unlock(); | |
952 | prov->recv(lport, fp); | |
953 | module_put(prov->module); | |
954 | return; | |
955 | drop: | |
956 | rcu_read_unlock(); | |
957 | FC_LPORT_DBG(lport, "dropping unexpected frame type %x\n", fh->fh_type); | |
958 | fc_frame_free(fp); | |
959 | lport->tt.exch_done(sp); | |
960 | } | |
961 | ||
42e9a92f | 962 | /** |
3a3b42bf RL |
963 | * fc_lport_reset() - Reset a local port |
964 | * @lport: The local port which should be reset | |
42e9a92f RL |
965 | * |
966 | * Locking Note: This functions should not be called with the | |
967 | * lport lock held. | |
968 | */ | |
969 | int fc_lport_reset(struct fc_lport *lport) | |
970 | { | |
f7db2c15 | 971 | cancel_delayed_work_sync(&lport->retry_work); |
42e9a92f RL |
972 | mutex_lock(&lport->lp_mutex); |
973 | fc_lport_enter_reset(lport); | |
974 | mutex_unlock(&lport->lp_mutex); | |
975 | return 0; | |
976 | } | |
977 | EXPORT_SYMBOL(fc_lport_reset); | |
978 | ||
979 | /** | |
3a3b42bf RL |
980 | * fc_lport_reset_locked() - Reset the local port w/ the lport lock held |
981 | * @lport: The local port to be reset | |
42e9a92f RL |
982 | * |
983 | * Locking Note: The lport lock is expected to be held before calling | |
984 | * this routine. | |
985 | */ | |
1190d925 | 986 | static void fc_lport_reset_locked(struct fc_lport *lport) |
42e9a92f | 987 | { |
3a3b42bf RL |
988 | if (lport->dns_rdata) |
989 | lport->tt.rport_logoff(lport->dns_rdata); | |
42e9a92f | 990 | |
2f2ac4a0 JE |
991 | if (lport->ptp_rdata) { |
992 | lport->tt.rport_logoff(lport->ptp_rdata); | |
993 | kref_put(&lport->ptp_rdata->kref, lport->tt.rport_destroy); | |
994 | lport->ptp_rdata = NULL; | |
995 | } | |
42e9a92f RL |
996 | |
997 | lport->tt.disc_stop(lport); | |
998 | ||
1f6ff364 | 999 | lport->tt.exch_mgr_reset(lport, 0, 0); |
42e9a92f | 1000 | fc_host_fabric_name(lport->host) = 0; |
093bb6a2 | 1001 | |
3726f358 | 1002 | if (lport->port_id && (!lport->point_to_multipoint || !lport->link_up)) |
093bb6a2 | 1003 | fc_lport_set_port_id(lport, 0, NULL); |
1190d925 | 1004 | } |
42e9a92f | 1005 | |
1190d925 JE |
1006 | /** |
1007 | * fc_lport_enter_reset() - Reset the local port | |
3a3b42bf | 1008 | * @lport: The local port to be reset |
1190d925 JE |
1009 | * |
1010 | * Locking Note: The lport lock is expected to be held before calling | |
1011 | * this routine. | |
1012 | */ | |
1013 | static void fc_lport_enter_reset(struct fc_lport *lport) | |
1014 | { | |
1015 | FC_LPORT_DBG(lport, "Entered RESET state from %s state\n", | |
1016 | fc_lport_state(lport)); | |
1017 | ||
55a66d3c VD |
1018 | if (lport->state == LPORT_ST_DISABLED || lport->state == LPORT_ST_LOGO) |
1019 | return; | |
1020 | ||
8faecddb CL |
1021 | if (lport->vport) { |
1022 | if (lport->link_up) | |
1023 | fc_vport_set_state(lport->vport, FC_VPORT_INITIALIZING); | |
1024 | else | |
1025 | fc_vport_set_state(lport->vport, FC_VPORT_LINKDOWN); | |
1026 | } | |
1190d925 | 1027 | fc_lport_state_enter(lport, LPORT_ST_RESET); |
8faecddb | 1028 | fc_vports_linkchange(lport); |
1190d925 | 1029 | fc_lport_reset_locked(lport); |
bc0e17f6 | 1030 | if (lport->link_up) |
42e9a92f RL |
1031 | fc_lport_enter_flogi(lport); |
1032 | } | |
1033 | ||
1190d925 | 1034 | /** |
3a3b42bf RL |
1035 | * fc_lport_enter_disabled() - Disable the local port |
1036 | * @lport: The local port to be reset | |
1190d925 JE |
1037 | * |
1038 | * Locking Note: The lport lock is expected to be held before calling | |
1039 | * this routine. | |
1040 | */ | |
1041 | static void fc_lport_enter_disabled(struct fc_lport *lport) | |
1042 | { | |
1043 | FC_LPORT_DBG(lport, "Entered disabled state from %s state\n", | |
1044 | fc_lport_state(lport)); | |
1045 | ||
1046 | fc_lport_state_enter(lport, LPORT_ST_DISABLED); | |
8faecddb | 1047 | fc_vports_linkchange(lport); |
1190d925 JE |
1048 | fc_lport_reset_locked(lport); |
1049 | } | |
1050 | ||
42e9a92f | 1051 | /** |
34f42a07 | 1052 | * fc_lport_error() - Handler for any errors |
3a3b42bf RL |
1053 | * @lport: The local port that the error was on |
1054 | * @fp: The error code encoded in a frame pointer | |
42e9a92f RL |
1055 | * |
1056 | * If the error was caused by a resource allocation failure | |
1057 | * then wait for half a second and retry, otherwise retry | |
1058 | * after the e_d_tov time. | |
1059 | */ | |
1060 | static void fc_lport_error(struct fc_lport *lport, struct fc_frame *fp) | |
1061 | { | |
1062 | unsigned long delay = 0; | |
7414705e RL |
1063 | FC_LPORT_DBG(lport, "Error %ld in state %s, retries %d\n", |
1064 | PTR_ERR(fp), fc_lport_state(lport), | |
1065 | lport->retry_count); | |
42e9a92f | 1066 | |
7f985231 BPG |
1067 | if (PTR_ERR(fp) == -FC_EX_CLOSED) |
1068 | return; | |
1069 | ||
1070 | /* | |
1071 | * Memory allocation failure, or the exchange timed out | |
1072 | * or we received LS_RJT. | |
1073 | * Retry after delay | |
1074 | */ | |
1075 | if (lport->retry_count < lport->max_retry_count) { | |
1076 | lport->retry_count++; | |
1077 | if (!fp) | |
1078 | delay = msecs_to_jiffies(500); | |
1079 | else | |
1080 | delay = msecs_to_jiffies(lport->e_d_tov); | |
1081 | ||
1082 | schedule_delayed_work(&lport->retry_work, delay); | |
1083 | } else | |
1084 | fc_lport_enter_reset(lport); | |
42e9a92f RL |
1085 | } |
1086 | ||
1087 | /** | |
7cccc157 | 1088 | * fc_lport_ns_resp() - Handle response to a name server |
3a3b42bf RL |
1089 | * registration exchange |
1090 | * @sp: current sequence in exchange | |
1091 | * @fp: response frame | |
42e9a92f RL |
1092 | * @lp_arg: Fibre Channel host port instance |
1093 | * | |
1094 | * Locking Note: This function will be called without the lport lock | |
3a3b42bf | 1095 | * held, but it will lock, call an _enter_* function or fc_lport_error() |
42e9a92f RL |
1096 | * and then unlock the lport. |
1097 | */ | |
7cccc157 CL |
1098 | static void fc_lport_ns_resp(struct fc_seq *sp, struct fc_frame *fp, |
1099 | void *lp_arg) | |
42e9a92f RL |
1100 | { |
1101 | struct fc_lport *lport = lp_arg; | |
1102 | struct fc_frame_header *fh; | |
1103 | struct fc_ct_hdr *ct; | |
1104 | ||
7cccc157 | 1105 | FC_LPORT_DBG(lport, "Received a ns %s\n", fc_els_resp_type(fp)); |
f657d299 | 1106 | |
42e9a92f RL |
1107 | if (fp == ERR_PTR(-FC_EX_CLOSED)) |
1108 | return; | |
1109 | ||
1110 | mutex_lock(&lport->lp_mutex); | |
1111 | ||
ab593b18 | 1112 | if (lport->state < LPORT_ST_RNN_ID || lport->state > LPORT_ST_RFF_ID) { |
7cccc157 | 1113 | FC_LPORT_DBG(lport, "Received a name server response, " |
3a3b42bf | 1114 | "but in state %s\n", fc_lport_state(lport)); |
76f6804e AJ |
1115 | if (IS_ERR(fp)) |
1116 | goto err; | |
42e9a92f RL |
1117 | goto out; |
1118 | } | |
1119 | ||
76f6804e AJ |
1120 | if (IS_ERR(fp)) { |
1121 | fc_lport_error(lport, fp); | |
1122 | goto err; | |
1123 | } | |
1124 | ||
42e9a92f RL |
1125 | fh = fc_frame_header_get(fp); |
1126 | ct = fc_frame_payload_get(fp, sizeof(*ct)); | |
1127 | ||
1128 | if (fh && ct && fh->fh_type == FC_TYPE_CT && | |
1129 | ct->ct_fs_type == FC_FST_DIR && | |
1130 | ct->ct_fs_subtype == FC_NS_SUBTYPE && | |
1131 | ntohs(ct->ct_cmd) == FC_FS_ACC) | |
7cccc157 CL |
1132 | switch (lport->state) { |
1133 | case LPORT_ST_RNN_ID: | |
c914f7d1 | 1134 | fc_lport_enter_ns(lport, LPORT_ST_RSNN_NN); |
7cccc157 CL |
1135 | break; |
1136 | case LPORT_ST_RSNN_NN: | |
c914f7d1 | 1137 | fc_lport_enter_ns(lport, LPORT_ST_RSPN_ID); |
7cccc157 CL |
1138 | break; |
1139 | case LPORT_ST_RSPN_ID: | |
c914f7d1 | 1140 | fc_lport_enter_ns(lport, LPORT_ST_RFT_ID); |
7cccc157 CL |
1141 | break; |
1142 | case LPORT_ST_RFT_ID: | |
ab593b18 JE |
1143 | fc_lport_enter_ns(lport, LPORT_ST_RFF_ID); |
1144 | break; | |
1145 | case LPORT_ST_RFF_ID: | |
7cccc157 CL |
1146 | fc_lport_enter_scr(lport); |
1147 | break; | |
1148 | default: | |
1149 | /* should have already been caught by state checks */ | |
1150 | break; | |
1151 | } | |
c9c7bd7a CL |
1152 | else |
1153 | fc_lport_error(lport, fp); | |
c9c7bd7a CL |
1154 | out: |
1155 | fc_frame_free(fp); | |
1156 | err: | |
1157 | mutex_unlock(&lport->lp_mutex); | |
1158 | } | |
1159 | ||
42e9a92f | 1160 | /** |
34f42a07 | 1161 | * fc_lport_scr_resp() - Handle response to State Change Register (SCR) request |
3a3b42bf RL |
1162 | * @sp: current sequence in SCR exchange |
1163 | * @fp: response frame | |
42e9a92f RL |
1164 | * @lp_arg: Fibre Channel lport port instance that sent the registration request |
1165 | * | |
1166 | * Locking Note: This function will be called without the lport lock | |
1167 | * held, but it will lock, call an _enter_* function or fc_lport_error | |
1168 | * and then unlock the lport. | |
1169 | */ | |
1170 | static void fc_lport_scr_resp(struct fc_seq *sp, struct fc_frame *fp, | |
1171 | void *lp_arg) | |
1172 | { | |
1173 | struct fc_lport *lport = lp_arg; | |
1174 | u8 op; | |
1175 | ||
f657d299 JE |
1176 | FC_LPORT_DBG(lport, "Received a SCR %s\n", fc_els_resp_type(fp)); |
1177 | ||
42e9a92f RL |
1178 | if (fp == ERR_PTR(-FC_EX_CLOSED)) |
1179 | return; | |
1180 | ||
1181 | mutex_lock(&lport->lp_mutex); | |
1182 | ||
42e9a92f | 1183 | if (lport->state != LPORT_ST_SCR) { |
7414705e RL |
1184 | FC_LPORT_DBG(lport, "Received a SCR response, but in state " |
1185 | "%s\n", fc_lport_state(lport)); | |
76f6804e AJ |
1186 | if (IS_ERR(fp)) |
1187 | goto err; | |
42e9a92f RL |
1188 | goto out; |
1189 | } | |
1190 | ||
76f6804e AJ |
1191 | if (IS_ERR(fp)) { |
1192 | fc_lport_error(lport, fp); | |
1193 | goto err; | |
1194 | } | |
1195 | ||
42e9a92f RL |
1196 | op = fc_frame_payload_op(fp); |
1197 | if (op == ELS_LS_ACC) | |
1198 | fc_lport_enter_ready(lport); | |
1199 | else | |
1200 | fc_lport_error(lport, fp); | |
1201 | ||
1202 | out: | |
1203 | fc_frame_free(fp); | |
1204 | err: | |
1205 | mutex_unlock(&lport->lp_mutex); | |
1206 | } | |
1207 | ||
1208 | /** | |
3a3b42bf RL |
1209 | * fc_lport_enter_scr() - Send a SCR (State Change Register) request |
1210 | * @lport: The local port to register for state changes | |
42e9a92f RL |
1211 | * |
1212 | * Locking Note: The lport lock is expected to be held before calling | |
1213 | * this routine. | |
1214 | */ | |
1215 | static void fc_lport_enter_scr(struct fc_lport *lport) | |
1216 | { | |
1217 | struct fc_frame *fp; | |
1218 | ||
7414705e RL |
1219 | FC_LPORT_DBG(lport, "Entered SCR state from %s state\n", |
1220 | fc_lport_state(lport)); | |
42e9a92f RL |
1221 | |
1222 | fc_lport_state_enter(lport, LPORT_ST_SCR); | |
1223 | ||
1224 | fp = fc_frame_alloc(lport, sizeof(struct fc_els_scr)); | |
1225 | if (!fp) { | |
1226 | fc_lport_error(lport, fp); | |
1227 | return; | |
1228 | } | |
1229 | ||
a46f327a | 1230 | if (!lport->tt.elsct_send(lport, FC_FID_FCTRL, fp, ELS_SCR, |
b94f8951 JE |
1231 | fc_lport_scr_resp, lport, |
1232 | 2 * lport->r_a_tov)) | |
8f550f93 | 1233 | fc_lport_error(lport, NULL); |
42e9a92f RL |
1234 | } |
1235 | ||
1236 | /** | |
c914f7d1 | 1237 | * fc_lport_enter_ns() - register some object with the name server |
42e9a92f RL |
1238 | * @lport: Fibre Channel local port to register |
1239 | * | |
1240 | * Locking Note: The lport lock is expected to be held before calling | |
1241 | * this routine. | |
1242 | */ | |
c914f7d1 | 1243 | static void fc_lport_enter_ns(struct fc_lport *lport, enum fc_lport_state state) |
c9866a54 CL |
1244 | { |
1245 | struct fc_frame *fp; | |
c914f7d1 CL |
1246 | enum fc_ns_req cmd; |
1247 | int size = sizeof(struct fc_ct_hdr); | |
c9866a54 CL |
1248 | size_t len; |
1249 | ||
c914f7d1 CL |
1250 | FC_LPORT_DBG(lport, "Entered %s state from %s state\n", |
1251 | fc_lport_state_names[state], | |
c9866a54 CL |
1252 | fc_lport_state(lport)); |
1253 | ||
c914f7d1 | 1254 | fc_lport_state_enter(lport, state); |
c9866a54 | 1255 | |
c914f7d1 CL |
1256 | switch (state) { |
1257 | case LPORT_ST_RNN_ID: | |
1258 | cmd = FC_NS_RNN_ID; | |
1259 | size += sizeof(struct fc_ns_rn_id); | |
1260 | break; | |
1261 | case LPORT_ST_RSNN_NN: | |
1262 | len = strnlen(fc_host_symbolic_name(lport->host), 255); | |
1263 | /* if there is no symbolic name, skip to RFT_ID */ | |
1264 | if (!len) | |
1265 | return fc_lport_enter_ns(lport, LPORT_ST_RFT_ID); | |
1266 | cmd = FC_NS_RSNN_NN; | |
1267 | size += sizeof(struct fc_ns_rsnn) + len; | |
1268 | break; | |
1269 | case LPORT_ST_RSPN_ID: | |
1270 | len = strnlen(fc_host_symbolic_name(lport->host), 255); | |
1271 | /* if there is no symbolic name, skip to RFT_ID */ | |
1272 | if (!len) | |
1273 | return fc_lport_enter_ns(lport, LPORT_ST_RFT_ID); | |
1274 | cmd = FC_NS_RSPN_ID; | |
1275 | size += sizeof(struct fc_ns_rspn) + len; | |
1276 | break; | |
1277 | case LPORT_ST_RFT_ID: | |
1278 | cmd = FC_NS_RFT_ID; | |
1279 | size += sizeof(struct fc_ns_rft); | |
1280 | break; | |
ab593b18 JE |
1281 | case LPORT_ST_RFF_ID: |
1282 | cmd = FC_NS_RFF_ID; | |
1283 | size += sizeof(struct fc_ns_rff_id); | |
1284 | break; | |
c914f7d1 CL |
1285 | default: |
1286 | fc_lport_error(lport, NULL); | |
5baa17c3 CL |
1287 | return; |
1288 | } | |
1289 | ||
c914f7d1 | 1290 | fp = fc_frame_alloc(lport, size); |
c9c7bd7a CL |
1291 | if (!fp) { |
1292 | fc_lport_error(lport, fp); | |
1293 | return; | |
1294 | } | |
1295 | ||
c914f7d1 | 1296 | if (!lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, cmd, |
7cccc157 | 1297 | fc_lport_ns_resp, |
b94f8951 | 1298 | lport, 3 * lport->r_a_tov)) |
c9c7bd7a CL |
1299 | fc_lport_error(lport, fp); |
1300 | } | |
1301 | ||
42e9a92f RL |
1302 | static struct fc_rport_operations fc_lport_rport_ops = { |
1303 | .event_callback = fc_lport_rport_callback, | |
1304 | }; | |
1305 | ||
1306 | /** | |
3a3b42bf RL |
1307 | * fc_rport_enter_dns() - Create a fc_rport for the name server |
1308 | * @lport: The local port requesting a remote port for the name server | |
42e9a92f RL |
1309 | * |
1310 | * Locking Note: The lport lock is expected to be held before calling | |
1311 | * this routine. | |
1312 | */ | |
1313 | static void fc_lport_enter_dns(struct fc_lport *lport) | |
1314 | { | |
ab28f1fd | 1315 | struct fc_rport_priv *rdata; |
42e9a92f | 1316 | |
7414705e RL |
1317 | FC_LPORT_DBG(lport, "Entered DNS state from %s state\n", |
1318 | fc_lport_state(lport)); | |
42e9a92f RL |
1319 | |
1320 | fc_lport_state_enter(lport, LPORT_ST_DNS); | |
1321 | ||
48f00902 | 1322 | mutex_lock(&lport->disc.disc_mutex); |
9737e6a7 | 1323 | rdata = lport->tt.rport_create(lport, FC_FID_DIR_SERV); |
48f00902 | 1324 | mutex_unlock(&lport->disc.disc_mutex); |
9fb9d328 | 1325 | if (!rdata) |
42e9a92f RL |
1326 | goto err; |
1327 | ||
42e9a92f | 1328 | rdata->ops = &fc_lport_rport_ops; |
9fb9d328 | 1329 | lport->tt.rport_login(rdata); |
42e9a92f RL |
1330 | return; |
1331 | ||
1332 | err: | |
1333 | fc_lport_error(lport, NULL); | |
1334 | } | |
1335 | ||
1336 | /** | |
3a3b42bf RL |
1337 | * fc_lport_timeout() - Handler for the retry_work timer |
1338 | * @work: The work struct of the local port | |
42e9a92f RL |
1339 | */ |
1340 | static void fc_lport_timeout(struct work_struct *work) | |
1341 | { | |
1342 | struct fc_lport *lport = | |
1343 | container_of(work, struct fc_lport, | |
1344 | retry_work.work); | |
1345 | ||
1346 | mutex_lock(&lport->lp_mutex); | |
1347 | ||
1348 | switch (lport->state) { | |
b1d9fd55 | 1349 | case LPORT_ST_DISABLED: |
22655ac2 JE |
1350 | WARN_ON(1); |
1351 | break; | |
42e9a92f | 1352 | case LPORT_ST_READY: |
42e9a92f RL |
1353 | WARN_ON(1); |
1354 | break; | |
22655ac2 JE |
1355 | case LPORT_ST_RESET: |
1356 | break; | |
42e9a92f RL |
1357 | case LPORT_ST_FLOGI: |
1358 | fc_lport_enter_flogi(lport); | |
1359 | break; | |
1360 | case LPORT_ST_DNS: | |
1361 | fc_lport_enter_dns(lport); | |
1362 | break; | |
c9c7bd7a | 1363 | case LPORT_ST_RNN_ID: |
5baa17c3 | 1364 | case LPORT_ST_RSNN_NN: |
c9866a54 | 1365 | case LPORT_ST_RSPN_ID: |
42e9a92f | 1366 | case LPORT_ST_RFT_ID: |
ab593b18 | 1367 | case LPORT_ST_RFF_ID: |
c914f7d1 | 1368 | fc_lport_enter_ns(lport, lport->state); |
42e9a92f RL |
1369 | break; |
1370 | case LPORT_ST_SCR: | |
1371 | fc_lport_enter_scr(lport); | |
1372 | break; | |
1373 | case LPORT_ST_LOGO: | |
1374 | fc_lport_enter_logo(lport); | |
1375 | break; | |
1376 | } | |
1377 | ||
1378 | mutex_unlock(&lport->lp_mutex); | |
1379 | } | |
1380 | ||
1381 | /** | |
34f42a07 | 1382 | * fc_lport_logo_resp() - Handle response to LOGO request |
3a3b42bf RL |
1383 | * @sp: The sequence that the LOGO was on |
1384 | * @fp: The LOGO frame | |
1385 | * @lp_arg: The lport port that received the LOGO request | |
42e9a92f RL |
1386 | * |
1387 | * Locking Note: This function will be called without the lport lock | |
3a3b42bf | 1388 | * held, but it will lock, call an _enter_* function or fc_lport_error() |
42e9a92f RL |
1389 | * and then unlock the lport. |
1390 | */ | |
11b56188 | 1391 | void fc_lport_logo_resp(struct fc_seq *sp, struct fc_frame *fp, |
3a3b42bf | 1392 | void *lp_arg) |
42e9a92f RL |
1393 | { |
1394 | struct fc_lport *lport = lp_arg; | |
1395 | u8 op; | |
1396 | ||
f657d299 JE |
1397 | FC_LPORT_DBG(lport, "Received a LOGO %s\n", fc_els_resp_type(fp)); |
1398 | ||
42e9a92f RL |
1399 | if (fp == ERR_PTR(-FC_EX_CLOSED)) |
1400 | return; | |
1401 | ||
1402 | mutex_lock(&lport->lp_mutex); | |
1403 | ||
42e9a92f | 1404 | if (lport->state != LPORT_ST_LOGO) { |
7414705e RL |
1405 | FC_LPORT_DBG(lport, "Received a LOGO response, but in state " |
1406 | "%s\n", fc_lport_state(lport)); | |
76f6804e AJ |
1407 | if (IS_ERR(fp)) |
1408 | goto err; | |
42e9a92f RL |
1409 | goto out; |
1410 | } | |
1411 | ||
76f6804e AJ |
1412 | if (IS_ERR(fp)) { |
1413 | fc_lport_error(lport, fp); | |
1414 | goto err; | |
1415 | } | |
1416 | ||
42e9a92f RL |
1417 | op = fc_frame_payload_op(fp); |
1418 | if (op == ELS_LS_ACC) | |
1190d925 | 1419 | fc_lport_enter_disabled(lport); |
42e9a92f RL |
1420 | else |
1421 | fc_lport_error(lport, fp); | |
1422 | ||
1423 | out: | |
1424 | fc_frame_free(fp); | |
1425 | err: | |
1426 | mutex_unlock(&lport->lp_mutex); | |
1427 | } | |
11b56188 | 1428 | EXPORT_SYMBOL(fc_lport_logo_resp); |
42e9a92f RL |
1429 | |
1430 | /** | |
34f42a07 | 1431 | * fc_rport_enter_logo() - Logout of the fabric |
3a3b42bf | 1432 | * @lport: The local port to be logged out |
42e9a92f RL |
1433 | * |
1434 | * Locking Note: The lport lock is expected to be held before calling | |
1435 | * this routine. | |
1436 | */ | |
1437 | static void fc_lport_enter_logo(struct fc_lport *lport) | |
1438 | { | |
1439 | struct fc_frame *fp; | |
1440 | struct fc_els_logo *logo; | |
1441 | ||
7414705e RL |
1442 | FC_LPORT_DBG(lport, "Entered LOGO state from %s state\n", |
1443 | fc_lport_state(lport)); | |
42e9a92f RL |
1444 | |
1445 | fc_lport_state_enter(lport, LPORT_ST_LOGO); | |
8faecddb | 1446 | fc_vports_linkchange(lport); |
42e9a92f | 1447 | |
42e9a92f RL |
1448 | fp = fc_frame_alloc(lport, sizeof(*logo)); |
1449 | if (!fp) { | |
1450 | fc_lport_error(lport, fp); | |
1451 | return; | |
1452 | } | |
1453 | ||
a46f327a | 1454 | if (!lport->tt.elsct_send(lport, FC_FID_FLOGI, fp, ELS_LOGO, |
b94f8951 JE |
1455 | fc_lport_logo_resp, lport, |
1456 | 2 * lport->r_a_tov)) | |
8f550f93 | 1457 | fc_lport_error(lport, NULL); |
42e9a92f RL |
1458 | } |
1459 | ||
1460 | /** | |
34f42a07 | 1461 | * fc_lport_flogi_resp() - Handle response to FLOGI request |
3a3b42bf RL |
1462 | * @sp: The sequence that the FLOGI was on |
1463 | * @fp: The FLOGI response frame | |
1464 | * @lp_arg: The lport port that received the FLOGI response | |
42e9a92f RL |
1465 | * |
1466 | * Locking Note: This function will be called without the lport lock | |
3a3b42bf | 1467 | * held, but it will lock, call an _enter_* function or fc_lport_error() |
42e9a92f RL |
1468 | * and then unlock the lport. |
1469 | */ | |
11b56188 | 1470 | void fc_lport_flogi_resp(struct fc_seq *sp, struct fc_frame *fp, |
3a3b42bf | 1471 | void *lp_arg) |
42e9a92f RL |
1472 | { |
1473 | struct fc_lport *lport = lp_arg; | |
42e9a92f RL |
1474 | struct fc_els_flogi *flp; |
1475 | u32 did; | |
1476 | u16 csp_flags; | |
1477 | unsigned int r_a_tov; | |
1478 | unsigned int e_d_tov; | |
1479 | u16 mfs; | |
1480 | ||
f657d299 JE |
1481 | FC_LPORT_DBG(lport, "Received a FLOGI %s\n", fc_els_resp_type(fp)); |
1482 | ||
42e9a92f RL |
1483 | if (fp == ERR_PTR(-FC_EX_CLOSED)) |
1484 | return; | |
1485 | ||
1486 | mutex_lock(&lport->lp_mutex); | |
1487 | ||
42e9a92f | 1488 | if (lport->state != LPORT_ST_FLOGI) { |
7414705e RL |
1489 | FC_LPORT_DBG(lport, "Received a FLOGI response, but in state " |
1490 | "%s\n", fc_lport_state(lport)); | |
76f6804e AJ |
1491 | if (IS_ERR(fp)) |
1492 | goto err; | |
42e9a92f RL |
1493 | goto out; |
1494 | } | |
1495 | ||
76f6804e AJ |
1496 | if (IS_ERR(fp)) { |
1497 | fc_lport_error(lport, fp); | |
1498 | goto err; | |
1499 | } | |
1500 | ||
251748a9 | 1501 | did = fc_frame_did(fp); |
60a3c4df | 1502 | if (fc_frame_payload_op(fp) == ELS_LS_ACC && did) { |
42e9a92f RL |
1503 | flp = fc_frame_payload_get(fp, sizeof(*flp)); |
1504 | if (flp) { | |
1505 | mfs = ntohs(flp->fl_csp.sp_bb_data) & | |
1506 | FC_SP_BB_DATA_MASK; | |
1507 | if (mfs >= FC_SP_MIN_MAX_PAYLOAD && | |
1508 | mfs < lport->mfs) | |
1509 | lport->mfs = mfs; | |
1510 | csp_flags = ntohs(flp->fl_csp.sp_features); | |
1511 | r_a_tov = ntohl(flp->fl_csp.sp_r_a_tov); | |
1512 | e_d_tov = ntohl(flp->fl_csp.sp_e_d_tov); | |
1513 | if (csp_flags & FC_SP_FT_EDTR) | |
1514 | e_d_tov /= 1000000; | |
db36c06c CL |
1515 | |
1516 | lport->npiv_enabled = !!(csp_flags & FC_SP_FT_NPIV_ACC); | |
1517 | ||
42e9a92f RL |
1518 | if ((csp_flags & FC_SP_FT_FPORT) == 0) { |
1519 | if (e_d_tov > lport->e_d_tov) | |
1520 | lport->e_d_tov = e_d_tov; | |
1521 | lport->r_a_tov = 2 * e_d_tov; | |
093bb6a2 | 1522 | fc_lport_set_port_id(lport, did, fp); |
e6d8a1b0 | 1523 | printk(KERN_INFO "host%d: libfc: " |
ce8b5df0 | 1524 | "Port (%6.6x) entered " |
e6d8a1b0 JE |
1525 | "point-to-point mode\n", |
1526 | lport->host->host_no, did); | |
251748a9 | 1527 | fc_lport_ptp_setup(lport, fc_frame_sid(fp), |
42e9a92f RL |
1528 | get_unaligned_be64( |
1529 | &flp->fl_wwpn), | |
1530 | get_unaligned_be64( | |
1531 | &flp->fl_wwnn)); | |
1532 | } else { | |
1533 | lport->e_d_tov = e_d_tov; | |
1534 | lport->r_a_tov = r_a_tov; | |
1535 | fc_host_fabric_name(lport->host) = | |
1536 | get_unaligned_be64(&flp->fl_wwnn); | |
093bb6a2 | 1537 | fc_lport_set_port_id(lport, did, fp); |
42e9a92f RL |
1538 | fc_lport_enter_dns(lport); |
1539 | } | |
1540 | } | |
60a3c4df VD |
1541 | } else { |
1542 | FC_LPORT_DBG(lport, "FLOGI RJT or bad response\n"); | |
7f985231 | 1543 | fc_lport_error(lport, fp); |
60a3c4df | 1544 | } |
42e9a92f RL |
1545 | |
1546 | out: | |
1547 | fc_frame_free(fp); | |
1548 | err: | |
1549 | mutex_unlock(&lport->lp_mutex); | |
1550 | } | |
11b56188 | 1551 | EXPORT_SYMBOL(fc_lport_flogi_resp); |
42e9a92f RL |
1552 | |
1553 | /** | |
34f42a07 | 1554 | * fc_rport_enter_flogi() - Send a FLOGI request to the fabric manager |
42e9a92f RL |
1555 | * @lport: Fibre Channel local port to be logged in to the fabric |
1556 | * | |
1557 | * Locking Note: The lport lock is expected to be held before calling | |
1558 | * this routine. | |
1559 | */ | |
1560 | void fc_lport_enter_flogi(struct fc_lport *lport) | |
1561 | { | |
1562 | struct fc_frame *fp; | |
1563 | ||
7414705e RL |
1564 | FC_LPORT_DBG(lport, "Entered FLOGI state from %s state\n", |
1565 | fc_lport_state(lport)); | |
42e9a92f RL |
1566 | |
1567 | fc_lport_state_enter(lport, LPORT_ST_FLOGI); | |
1568 | ||
3726f358 JE |
1569 | if (lport->point_to_multipoint) { |
1570 | if (lport->port_id) | |
1571 | fc_lport_enter_ready(lport); | |
1572 | return; | |
1573 | } | |
1574 | ||
42e9a92f RL |
1575 | fp = fc_frame_alloc(lport, sizeof(struct fc_els_flogi)); |
1576 | if (!fp) | |
1577 | return fc_lport_error(lport, fp); | |
1578 | ||
db36c06c CL |
1579 | if (!lport->tt.elsct_send(lport, FC_FID_FLOGI, fp, |
1580 | lport->vport ? ELS_FDISC : ELS_FLOGI, | |
b94f8951 JE |
1581 | fc_lport_flogi_resp, lport, |
1582 | lport->vport ? 2 * lport->r_a_tov : | |
1583 | lport->e_d_tov)) | |
8f550f93 | 1584 | fc_lport_error(lport, NULL); |
42e9a92f RL |
1585 | } |
1586 | ||
3a3b42bf RL |
1587 | /** |
1588 | * fc_lport_config() - Configure a fc_lport | |
1589 | * @lport: The local port to be configured | |
1590 | */ | |
42e9a92f RL |
1591 | int fc_lport_config(struct fc_lport *lport) |
1592 | { | |
72fa396b | 1593 | INIT_LIST_HEAD(&lport->ema_list); |
42e9a92f RL |
1594 | INIT_DELAYED_WORK(&lport->retry_work, fc_lport_timeout); |
1595 | mutex_init(&lport->lp_mutex); | |
1596 | ||
b1d9fd55 | 1597 | fc_lport_state_enter(lport, LPORT_ST_DISABLED); |
42e9a92f RL |
1598 | |
1599 | fc_lport_add_fc4_type(lport, FC_TYPE_FCP); | |
1600 | fc_lport_add_fc4_type(lport, FC_TYPE_CT); | |
acc1a921 | 1601 | fc_fc4_conf_lport_params(lport, FC_TYPE_FCP); |
42e9a92f RL |
1602 | |
1603 | return 0; | |
1604 | } | |
1605 | EXPORT_SYMBOL(fc_lport_config); | |
1606 | ||
3a3b42bf RL |
1607 | /** |
1608 | * fc_lport_init() - Initialize the lport layer for a local port | |
1609 | * @lport: The local port to initialize the exchange layer for | |
1610 | */ | |
42e9a92f RL |
1611 | int fc_lport_init(struct fc_lport *lport) |
1612 | { | |
1613 | if (!lport->tt.lport_recv) | |
1614 | lport->tt.lport_recv = fc_lport_recv_req; | |
1615 | ||
1616 | if (!lport->tt.lport_reset) | |
1617 | lport->tt.lport_reset = fc_lport_reset; | |
1618 | ||
1619 | fc_host_port_type(lport->host) = FC_PORTTYPE_NPORT; | |
1620 | fc_host_node_name(lport->host) = lport->wwnn; | |
1621 | fc_host_port_name(lport->host) = lport->wwpn; | |
1622 | fc_host_supported_classes(lport->host) = FC_COS_CLASS3; | |
1623 | memset(fc_host_supported_fc4s(lport->host), 0, | |
1624 | sizeof(fc_host_supported_fc4s(lport->host))); | |
1625 | fc_host_supported_fc4s(lport->host)[2] = 1; | |
1626 | fc_host_supported_fc4s(lport->host)[7] = 1; | |
1627 | ||
1628 | /* This value is also unchanging */ | |
1629 | memset(fc_host_active_fc4s(lport->host), 0, | |
1630 | sizeof(fc_host_active_fc4s(lport->host))); | |
1631 | fc_host_active_fc4s(lport->host)[2] = 1; | |
1632 | fc_host_active_fc4s(lport->host)[7] = 1; | |
1633 | fc_host_maxframe_size(lport->host) = lport->mfs; | |
1634 | fc_host_supported_speeds(lport->host) = 0; | |
1635 | if (lport->link_supported_speeds & FC_PORTSPEED_1GBIT) | |
1636 | fc_host_supported_speeds(lport->host) |= FC_PORTSPEED_1GBIT; | |
1637 | if (lport->link_supported_speeds & FC_PORTSPEED_10GBIT) | |
1638 | fc_host_supported_speeds(lport->host) |= FC_PORTSPEED_10GBIT; | |
70d53b04 | 1639 | fc_fc4_add_lport(lport); |
42e9a92f RL |
1640 | |
1641 | return 0; | |
1642 | } | |
1643 | EXPORT_SYMBOL(fc_lport_init); | |
a51ab396 SM |
1644 | |
1645 | /** | |
3a3b42bf RL |
1646 | * fc_lport_bsg_resp() - The common response handler for FC Passthrough requests |
1647 | * @sp: The sequence for the FC Passthrough response | |
1648 | * @fp: The response frame | |
1649 | * @info_arg: The BSG info that the response is for | |
a51ab396 SM |
1650 | */ |
1651 | static void fc_lport_bsg_resp(struct fc_seq *sp, struct fc_frame *fp, | |
1652 | void *info_arg) | |
1653 | { | |
1654 | struct fc_bsg_info *info = info_arg; | |
1655 | struct fc_bsg_job *job = info->job; | |
1656 | struct fc_lport *lport = info->lport; | |
1657 | struct fc_frame_header *fh; | |
1658 | size_t len; | |
1659 | void *buf; | |
1660 | ||
1661 | if (IS_ERR(fp)) { | |
1662 | job->reply->result = (PTR_ERR(fp) == -FC_EX_CLOSED) ? | |
1663 | -ECONNABORTED : -ETIMEDOUT; | |
1664 | job->reply_len = sizeof(uint32_t); | |
1665 | job->state_flags |= FC_RQST_STATE_DONE; | |
1666 | job->job_done(job); | |
1667 | kfree(info); | |
1668 | return; | |
1669 | } | |
1670 | ||
1671 | mutex_lock(&lport->lp_mutex); | |
1672 | fh = fc_frame_header_get(fp); | |
1673 | len = fr_len(fp) - sizeof(*fh); | |
1674 | buf = fc_frame_payload_get(fp, 0); | |
1675 | ||
1676 | if (fr_sof(fp) == FC_SOF_I3 && !ntohs(fh->fh_seq_cnt)) { | |
1677 | /* Get the response code from the first frame payload */ | |
1678 | unsigned short cmd = (info->rsp_code == FC_FS_ACC) ? | |
1679 | ntohs(((struct fc_ct_hdr *)buf)->ct_cmd) : | |
1680 | (unsigned short)fc_frame_payload_op(fp); | |
1681 | ||
1682 | /* Save the reply status of the job */ | |
1683 | job->reply->reply_data.ctels_reply.status = | |
1684 | (cmd == info->rsp_code) ? | |
1685 | FC_CTELS_STATUS_OK : FC_CTELS_STATUS_REJECT; | |
1686 | } | |
1687 | ||
1688 | job->reply->reply_payload_rcv_len += | |
1689 | fc_copy_buffer_to_sglist(buf, len, info->sg, &info->nents, | |
1690 | &info->offset, KM_BIO_SRC_IRQ, NULL); | |
1691 | ||
1692 | if (fr_eof(fp) == FC_EOF_T && | |
1693 | (ntoh24(fh->fh_f_ctl) & (FC_FC_LAST_SEQ | FC_FC_END_SEQ)) == | |
1694 | (FC_FC_LAST_SEQ | FC_FC_END_SEQ)) { | |
1695 | if (job->reply->reply_payload_rcv_len > | |
1696 | job->reply_payload.payload_len) | |
1697 | job->reply->reply_payload_rcv_len = | |
1698 | job->reply_payload.payload_len; | |
1699 | job->reply->result = 0; | |
1700 | job->state_flags |= FC_RQST_STATE_DONE; | |
1701 | job->job_done(job); | |
1702 | kfree(info); | |
1703 | } | |
1704 | fc_frame_free(fp); | |
1705 | mutex_unlock(&lport->lp_mutex); | |
1706 | } | |
1707 | ||
1708 | /** | |
3a3b42bf RL |
1709 | * fc_lport_els_request() - Send ELS passthrough request |
1710 | * @job: The BSG Passthrough job | |
a51ab396 | 1711 | * @lport: The local port sending the request |
3a3b42bf | 1712 | * @did: The destination port id |
a51ab396 SM |
1713 | * |
1714 | * Locking Note: The lport lock is expected to be held before calling | |
1715 | * this routine. | |
1716 | */ | |
1717 | static int fc_lport_els_request(struct fc_bsg_job *job, | |
1718 | struct fc_lport *lport, | |
1719 | u32 did, u32 tov) | |
1720 | { | |
1721 | struct fc_bsg_info *info; | |
1722 | struct fc_frame *fp; | |
1723 | struct fc_frame_header *fh; | |
1724 | char *pp; | |
1725 | int len; | |
1726 | ||
70d919fb | 1727 | fp = fc_frame_alloc(lport, job->request_payload.payload_len); |
a51ab396 SM |
1728 | if (!fp) |
1729 | return -ENOMEM; | |
1730 | ||
1731 | len = job->request_payload.payload_len; | |
1732 | pp = fc_frame_payload_get(fp, len); | |
1733 | ||
1734 | sg_copy_to_buffer(job->request_payload.sg_list, | |
1735 | job->request_payload.sg_cnt, | |
1736 | pp, len); | |
1737 | ||
1738 | fh = fc_frame_header_get(fp); | |
1739 | fh->fh_r_ctl = FC_RCTL_ELS_REQ; | |
1740 | hton24(fh->fh_d_id, did); | |
7b2787ec | 1741 | hton24(fh->fh_s_id, lport->port_id); |
a51ab396 | 1742 | fh->fh_type = FC_TYPE_ELS; |
24f089e2 | 1743 | hton24(fh->fh_f_ctl, FC_FCTL_REQ); |
a51ab396 SM |
1744 | fh->fh_cs_ctl = 0; |
1745 | fh->fh_df_ctl = 0; | |
1746 | fh->fh_parm_offset = 0; | |
1747 | ||
1748 | info = kzalloc(sizeof(struct fc_bsg_info), GFP_KERNEL); | |
1749 | if (!info) { | |
1750 | fc_frame_free(fp); | |
1751 | return -ENOMEM; | |
1752 | } | |
1753 | ||
1754 | info->job = job; | |
1755 | info->lport = lport; | |
1756 | info->rsp_code = ELS_LS_ACC; | |
1757 | info->nents = job->reply_payload.sg_cnt; | |
1758 | info->sg = job->reply_payload.sg_list; | |
1759 | ||
1760 | if (!lport->tt.exch_seq_send(lport, fp, fc_lport_bsg_resp, | |
72e0daad HD |
1761 | NULL, info, tov)) { |
1762 | kfree(info); | |
a51ab396 | 1763 | return -ECOMM; |
72e0daad | 1764 | } |
a51ab396 SM |
1765 | return 0; |
1766 | } | |
1767 | ||
1768 | /** | |
3a3b42bf RL |
1769 | * fc_lport_ct_request() - Send CT Passthrough request |
1770 | * @job: The BSG Passthrough job | |
a51ab396 SM |
1771 | * @lport: The local port sending the request |
1772 | * @did: The destination FC-ID | |
3a3b42bf | 1773 | * @tov: The timeout period to wait for the response |
a51ab396 SM |
1774 | * |
1775 | * Locking Note: The lport lock is expected to be held before calling | |
1776 | * this routine. | |
1777 | */ | |
1778 | static int fc_lport_ct_request(struct fc_bsg_job *job, | |
1779 | struct fc_lport *lport, u32 did, u32 tov) | |
1780 | { | |
1781 | struct fc_bsg_info *info; | |
1782 | struct fc_frame *fp; | |
1783 | struct fc_frame_header *fh; | |
1784 | struct fc_ct_req *ct; | |
1785 | size_t len; | |
1786 | ||
1787 | fp = fc_frame_alloc(lport, sizeof(struct fc_ct_hdr) + | |
1788 | job->request_payload.payload_len); | |
1789 | if (!fp) | |
1790 | return -ENOMEM; | |
1791 | ||
1792 | len = job->request_payload.payload_len; | |
1793 | ct = fc_frame_payload_get(fp, len); | |
1794 | ||
1795 | sg_copy_to_buffer(job->request_payload.sg_list, | |
1796 | job->request_payload.sg_cnt, | |
1797 | ct, len); | |
1798 | ||
1799 | fh = fc_frame_header_get(fp); | |
1800 | fh->fh_r_ctl = FC_RCTL_DD_UNSOL_CTL; | |
1801 | hton24(fh->fh_d_id, did); | |
7b2787ec | 1802 | hton24(fh->fh_s_id, lport->port_id); |
a51ab396 | 1803 | fh->fh_type = FC_TYPE_CT; |
24f089e2 | 1804 | hton24(fh->fh_f_ctl, FC_FCTL_REQ); |
a51ab396 SM |
1805 | fh->fh_cs_ctl = 0; |
1806 | fh->fh_df_ctl = 0; | |
1807 | fh->fh_parm_offset = 0; | |
1808 | ||
1809 | info = kzalloc(sizeof(struct fc_bsg_info), GFP_KERNEL); | |
1810 | if (!info) { | |
1811 | fc_frame_free(fp); | |
1812 | return -ENOMEM; | |
1813 | } | |
1814 | ||
1815 | info->job = job; | |
1816 | info->lport = lport; | |
1817 | info->rsp_code = FC_FS_ACC; | |
1818 | info->nents = job->reply_payload.sg_cnt; | |
1819 | info->sg = job->reply_payload.sg_list; | |
1820 | ||
1821 | if (!lport->tt.exch_seq_send(lport, fp, fc_lport_bsg_resp, | |
2d6dfb00 HD |
1822 | NULL, info, tov)) { |
1823 | kfree(info); | |
a51ab396 | 1824 | return -ECOMM; |
2d6dfb00 | 1825 | } |
a51ab396 SM |
1826 | return 0; |
1827 | } | |
1828 | ||
1829 | /** | |
1830 | * fc_lport_bsg_request() - The common entry point for sending | |
3a3b42bf RL |
1831 | * FC Passthrough requests |
1832 | * @job: The BSG passthrough job | |
a51ab396 SM |
1833 | */ |
1834 | int fc_lport_bsg_request(struct fc_bsg_job *job) | |
1835 | { | |
1836 | struct request *rsp = job->req->next_rq; | |
1837 | struct Scsi_Host *shost = job->shost; | |
1838 | struct fc_lport *lport = shost_priv(shost); | |
1839 | struct fc_rport *rport; | |
1840 | struct fc_rport_priv *rdata; | |
1841 | int rc = -EINVAL; | |
1842 | u32 did; | |
1843 | ||
1844 | job->reply->reply_payload_rcv_len = 0; | |
b248df30 HD |
1845 | if (rsp) |
1846 | rsp->resid_len = job->reply_payload.payload_len; | |
a51ab396 SM |
1847 | |
1848 | mutex_lock(&lport->lp_mutex); | |
1849 | ||
1850 | switch (job->request->msgcode) { | |
1851 | case FC_BSG_RPT_ELS: | |
1852 | rport = job->rport; | |
1853 | if (!rport) | |
1854 | break; | |
1855 | ||
1856 | rdata = rport->dd_data; | |
1857 | rc = fc_lport_els_request(job, lport, rport->port_id, | |
1858 | rdata->e_d_tov); | |
1859 | break; | |
1860 | ||
1861 | case FC_BSG_RPT_CT: | |
1862 | rport = job->rport; | |
1863 | if (!rport) | |
1864 | break; | |
1865 | ||
1866 | rdata = rport->dd_data; | |
1867 | rc = fc_lport_ct_request(job, lport, rport->port_id, | |
1868 | rdata->e_d_tov); | |
1869 | break; | |
1870 | ||
1871 | case FC_BSG_HST_CT: | |
1872 | did = ntoh24(job->request->rqst_data.h_ct.port_id); | |
1873 | if (did == FC_FID_DIR_SERV) | |
3a3b42bf | 1874 | rdata = lport->dns_rdata; |
a51ab396 SM |
1875 | else |
1876 | rdata = lport->tt.rport_lookup(lport, did); | |
1877 | ||
1878 | if (!rdata) | |
1879 | break; | |
1880 | ||
1881 | rc = fc_lport_ct_request(job, lport, did, rdata->e_d_tov); | |
1882 | break; | |
1883 | ||
1884 | case FC_BSG_HST_ELS_NOLOGIN: | |
1885 | did = ntoh24(job->request->rqst_data.h_els.port_id); | |
1886 | rc = fc_lport_els_request(job, lport, did, lport->e_d_tov); | |
1887 | break; | |
1888 | } | |
1889 | ||
1890 | mutex_unlock(&lport->lp_mutex); | |
1891 | return rc; | |
1892 | } | |
1893 | EXPORT_SYMBOL(fc_lport_bsg_request); |