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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> | |
77a2b73a | 91 | #include <linux/delay.h> |
acf3368f | 92 | #include <linux/module.h> |
5a0e3ad6 | 93 | #include <linux/slab.h> |
42e9a92f RL |
94 | #include <asm/unaligned.h> |
95 | ||
96 | #include <scsi/fc/fc_gs.h> | |
97 | ||
98 | #include <scsi/libfc.h> | |
99 | #include <scsi/fc_encode.h> | |
a51ab396 | 100 | #include <linux/scatterlist.h> |
42e9a92f | 101 | |
8866a5d9 RL |
102 | #include "fc_libfc.h" |
103 | ||
42e9a92f RL |
104 | /* Fabric IDs to use for point-to-point mode, chosen on whims. */ |
105 | #define FC_LOCAL_PTP_FID_LO 0x010101 | |
106 | #define FC_LOCAL_PTP_FID_HI 0x010102 | |
107 | ||
108 | #define DNS_DELAY 3 /* Discovery delay after RSCN (in seconds)*/ | |
109 | ||
42e9a92f RL |
110 | static void fc_lport_error(struct fc_lport *, struct fc_frame *); |
111 | ||
112 | static void fc_lport_enter_reset(struct fc_lport *); | |
113 | static void fc_lport_enter_flogi(struct fc_lport *); | |
114 | static void fc_lport_enter_dns(struct fc_lport *); | |
c914f7d1 | 115 | static void fc_lport_enter_ns(struct fc_lport *, enum fc_lport_state); |
42e9a92f RL |
116 | static void fc_lport_enter_scr(struct fc_lport *); |
117 | static void fc_lport_enter_ready(struct fc_lport *); | |
118 | static void fc_lport_enter_logo(struct fc_lport *); | |
d78c317f NP |
119 | static void fc_lport_enter_fdmi(struct fc_lport *lport); |
120 | static void fc_lport_enter_ms(struct fc_lport *, enum fc_lport_state); | |
42e9a92f RL |
121 | |
122 | static const char *fc_lport_state_names[] = { | |
b1d9fd55 | 123 | [LPORT_ST_DISABLED] = "disabled", |
42e9a92f RL |
124 | [LPORT_ST_FLOGI] = "FLOGI", |
125 | [LPORT_ST_DNS] = "dNS", | |
c9c7bd7a | 126 | [LPORT_ST_RNN_ID] = "RNN_ID", |
5baa17c3 | 127 | [LPORT_ST_RSNN_NN] = "RSNN_NN", |
c9866a54 | 128 | [LPORT_ST_RSPN_ID] = "RSPN_ID", |
42e9a92f | 129 | [LPORT_ST_RFT_ID] = "RFT_ID", |
ab593b18 | 130 | [LPORT_ST_RFF_ID] = "RFF_ID", |
d78c317f NP |
131 | [LPORT_ST_FDMI] = "FDMI", |
132 | [LPORT_ST_RHBA] = "RHBA", | |
133 | [LPORT_ST_RPA] = "RPA", | |
134 | [LPORT_ST_DHBA] = "DHBA", | |
135 | [LPORT_ST_DPRT] = "DPRT", | |
42e9a92f RL |
136 | [LPORT_ST_SCR] = "SCR", |
137 | [LPORT_ST_READY] = "Ready", | |
138 | [LPORT_ST_LOGO] = "LOGO", | |
139 | [LPORT_ST_RESET] = "reset", | |
140 | }; | |
141 | ||
a51ab396 SM |
142 | /** |
143 | * struct fc_bsg_info - FC Passthrough managemet structure | |
144 | * @job: The passthrough job | |
145 | * @lport: The local port to pass through a command | |
146 | * @rsp_code: The expected response code | |
3a3b42bf | 147 | * @sg: job->reply_payload.sg_list |
a51ab396 SM |
148 | * @nents: job->reply_payload.sg_cnt |
149 | * @offset: The offset into the response data | |
150 | */ | |
151 | struct fc_bsg_info { | |
75cc8cfc | 152 | struct bsg_job *job; |
a51ab396 SM |
153 | struct fc_lport *lport; |
154 | u16 rsp_code; | |
155 | struct scatterlist *sg; | |
156 | u32 nents; | |
157 | size_t offset; | |
158 | }; | |
159 | ||
3a3b42bf RL |
160 | /** |
161 | * fc_frame_drop() - Dummy frame handler | |
162 | * @lport: The local port the frame was received on | |
163 | * @fp: The received frame | |
164 | */ | |
42e9a92f RL |
165 | static int fc_frame_drop(struct fc_lport *lport, struct fc_frame *fp) |
166 | { | |
167 | fc_frame_free(fp); | |
168 | return 0; | |
169 | } | |
170 | ||
171 | /** | |
34f42a07 | 172 | * fc_lport_rport_callback() - Event handler for rport events |
42e9a92f | 173 | * @lport: The lport which is receiving the event |
9fb9d328 | 174 | * @rdata: private remote port data |
25985edc | 175 | * @event: The event that occurred |
42e9a92f RL |
176 | * |
177 | * Locking Note: The rport lock should not be held when calling | |
178 | * this function. | |
179 | */ | |
180 | static void fc_lport_rport_callback(struct fc_lport *lport, | |
9fb9d328 | 181 | struct fc_rport_priv *rdata, |
42e9a92f RL |
182 | enum fc_rport_event event) |
183 | { | |
ce8b5df0 | 184 | FC_LPORT_DBG(lport, "Received a %d event for port (%6.6x)\n", event, |
f211fa51 | 185 | rdata->ids.port_id); |
42e9a92f | 186 | |
b5cbf083 | 187 | mutex_lock(&lport->lp_mutex); |
42e9a92f | 188 | switch (event) { |
4c0f62b5 | 189 | case RPORT_EV_READY: |
b5cbf083 | 190 | if (lport->state == LPORT_ST_DNS) { |
3a3b42bf | 191 | lport->dns_rdata = rdata; |
c914f7d1 | 192 | fc_lport_enter_ns(lport, LPORT_ST_RNN_ID); |
d78c317f NP |
193 | } else if (lport->state == LPORT_ST_FDMI) { |
194 | lport->ms_rdata = rdata; | |
195 | fc_lport_enter_ms(lport, LPORT_ST_DHBA); | |
b5cbf083 JE |
196 | } else { |
197 | FC_LPORT_DBG(lport, "Received an READY event " | |
ce8b5df0 | 198 | "on port (%6.6x) for the directory " |
b5cbf083 | 199 | "server, but the lport is not " |
d78c317f | 200 | "in the DNS or FDMI state, it's in the " |
b5cbf083 JE |
201 | "%d state", rdata->ids.port_id, |
202 | lport->state); | |
c96c792a | 203 | fc_rport_logoff(rdata); |
b5cbf083 | 204 | } |
42e9a92f RL |
205 | break; |
206 | case RPORT_EV_LOGO: | |
207 | case RPORT_EV_FAILED: | |
208 | case RPORT_EV_STOP: | |
d78c317f NP |
209 | if (rdata->ids.port_id == FC_FID_DIR_SERV) |
210 | lport->dns_rdata = NULL; | |
211 | else if (rdata->ids.port_id == FC_FID_MGMT_SERV) | |
212 | lport->ms_rdata = NULL; | |
42e9a92f RL |
213 | break; |
214 | case RPORT_EV_NONE: | |
215 | break; | |
216 | } | |
b5cbf083 | 217 | mutex_unlock(&lport->lp_mutex); |
42e9a92f RL |
218 | } |
219 | ||
220 | /** | |
34f42a07 | 221 | * fc_lport_state() - Return a string which represents the lport's state |
42e9a92f RL |
222 | * @lport: The lport whose state is to converted to a string |
223 | */ | |
224 | static const char *fc_lport_state(struct fc_lport *lport) | |
225 | { | |
226 | const char *cp; | |
227 | ||
228 | cp = fc_lport_state_names[lport->state]; | |
229 | if (!cp) | |
230 | cp = "unknown"; | |
231 | return cp; | |
232 | } | |
233 | ||
234 | /** | |
34f42a07 | 235 | * fc_lport_ptp_setup() - Create an rport for point-to-point mode |
3a3b42bf RL |
236 | * @lport: The lport to attach the ptp rport to |
237 | * @remote_fid: The FID of the ptp rport | |
42e9a92f RL |
238 | * @remote_wwpn: The WWPN of the ptp rport |
239 | * @remote_wwnn: The WWNN of the ptp rport | |
a407c593 HR |
240 | * |
241 | * Locking Note: The lport lock is expected to be held before calling | |
242 | * this routine. | |
42e9a92f RL |
243 | */ |
244 | static void fc_lport_ptp_setup(struct fc_lport *lport, | |
245 | u32 remote_fid, u64 remote_wwpn, | |
246 | u64 remote_wwnn) | |
247 | { | |
2f2ac4a0 | 248 | if (lport->ptp_rdata) { |
c96c792a | 249 | fc_rport_logoff(lport->ptp_rdata); |
944ef968 | 250 | kref_put(&lport->ptp_rdata->kref, fc_rport_destroy); |
2f2ac4a0 | 251 | } |
a407c593 | 252 | mutex_lock(&lport->disc.disc_mutex); |
2580064b | 253 | lport->ptp_rdata = fc_rport_create(lport, remote_fid); |
2f2ac4a0 | 254 | kref_get(&lport->ptp_rdata->kref); |
3a3b42bf RL |
255 | lport->ptp_rdata->ids.port_name = remote_wwpn; |
256 | lport->ptp_rdata->ids.node_name = remote_wwnn; | |
48f00902 | 257 | mutex_unlock(&lport->disc.disc_mutex); |
42e9a92f | 258 | |
05d7d3b0 | 259 | fc_rport_login(lport->ptp_rdata); |
42e9a92f RL |
260 | |
261 | fc_lport_enter_ready(lport); | |
262 | } | |
263 | ||
3a3b42bf RL |
264 | /** |
265 | * fc_get_host_port_state() - Return the port state of the given Scsi_Host | |
266 | * @shost: The SCSI host whose port state is to be determined | |
267 | */ | |
42e9a92f RL |
268 | void fc_get_host_port_state(struct Scsi_Host *shost) |
269 | { | |
3a3b42bf | 270 | struct fc_lport *lport = shost_priv(shost); |
42e9a92f | 271 | |
3a3b42bf RL |
272 | mutex_lock(&lport->lp_mutex); |
273 | if (!lport->link_up) | |
8faecddb | 274 | fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN; |
42e9a92f | 275 | else |
3a3b42bf | 276 | switch (lport->state) { |
8faecddb CL |
277 | case LPORT_ST_READY: |
278 | fc_host_port_state(shost) = FC_PORTSTATE_ONLINE; | |
279 | break; | |
280 | default: | |
281 | fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE; | |
282 | } | |
3a3b42bf | 283 | mutex_unlock(&lport->lp_mutex); |
42e9a92f RL |
284 | } |
285 | EXPORT_SYMBOL(fc_get_host_port_state); | |
286 | ||
3a3b42bf RL |
287 | /** |
288 | * fc_get_host_speed() - Return the speed of the given Scsi_Host | |
289 | * @shost: The SCSI host whose port speed is to be determined | |
290 | */ | |
42e9a92f RL |
291 | void fc_get_host_speed(struct Scsi_Host *shost) |
292 | { | |
293 | struct fc_lport *lport = shost_priv(shost); | |
294 | ||
295 | fc_host_speed(shost) = lport->link_speed; | |
296 | } | |
297 | EXPORT_SYMBOL(fc_get_host_speed); | |
298 | ||
3a3b42bf RL |
299 | /** |
300 | * fc_get_host_stats() - Return the Scsi_Host's statistics | |
301 | * @shost: The SCSI host whose statistics are to be returned | |
302 | */ | |
42e9a92f RL |
303 | struct fc_host_statistics *fc_get_host_stats(struct Scsi_Host *shost) |
304 | { | |
1bd49b48 | 305 | struct fc_host_statistics *fc_stats; |
3a3b42bf | 306 | struct fc_lport *lport = shost_priv(shost); |
582b45bc | 307 | unsigned int cpu; |
5f0e385f JE |
308 | u64 fcp_in_bytes = 0; |
309 | u64 fcp_out_bytes = 0; | |
42e9a92f | 310 | |
1bd49b48 VD |
311 | fc_stats = &lport->host_stats; |
312 | memset(fc_stats, 0, sizeof(struct fc_host_statistics)); | |
42e9a92f | 313 | |
208da78e | 314 | fc_stats->seconds_since_last_reset = (jiffies - lport->boot_time) / HZ; |
42e9a92f | 315 | |
582b45bc | 316 | for_each_possible_cpu(cpu) { |
1bd49b48 VD |
317 | struct fc_stats *stats; |
318 | ||
319 | stats = per_cpu_ptr(lport->stats, cpu); | |
320 | ||
321 | fc_stats->tx_frames += stats->TxFrames; | |
322 | fc_stats->tx_words += stats->TxWords; | |
323 | fc_stats->rx_frames += stats->RxFrames; | |
324 | fc_stats->rx_words += stats->RxWords; | |
325 | fc_stats->error_frames += stats->ErrorFrames; | |
326 | fc_stats->invalid_crc_count += stats->InvalidCRCCount; | |
327 | fc_stats->fcp_input_requests += stats->InputRequests; | |
328 | fc_stats->fcp_output_requests += stats->OutputRequests; | |
329 | fc_stats->fcp_control_requests += stats->ControlRequests; | |
5f0e385f JE |
330 | fcp_in_bytes += stats->InputBytes; |
331 | fcp_out_bytes += stats->OutputBytes; | |
4e5fae7a VD |
332 | fc_stats->fcp_packet_alloc_failures += stats->FcpPktAllocFails; |
333 | fc_stats->fcp_packet_aborts += stats->FcpPktAborts; | |
334 | fc_stats->fcp_frame_alloc_failures += stats->FcpFrameAllocFails; | |
1bd49b48 | 335 | fc_stats->link_failure_count += stats->LinkFailureCount; |
42e9a92f | 336 | } |
1bd49b48 VD |
337 | fc_stats->fcp_input_megabytes = div_u64(fcp_in_bytes, 1000000); |
338 | fc_stats->fcp_output_megabytes = div_u64(fcp_out_bytes, 1000000); | |
339 | fc_stats->lip_count = -1; | |
340 | fc_stats->nos_count = -1; | |
341 | fc_stats->loss_of_sync_count = -1; | |
342 | fc_stats->loss_of_signal_count = -1; | |
343 | fc_stats->prim_seq_protocol_err_count = -1; | |
344 | fc_stats->dumped_frames = -1; | |
4e5fae7a VD |
345 | |
346 | /* update exches stats */ | |
347 | fc_exch_update_stats(lport); | |
348 | ||
1bd49b48 | 349 | return fc_stats; |
42e9a92f RL |
350 | } |
351 | EXPORT_SYMBOL(fc_get_host_stats); | |
352 | ||
3a3b42bf RL |
353 | /** |
354 | * fc_lport_flogi_fill() - Fill in FLOGI command for request | |
355 | * @lport: The local port the FLOGI is for | |
356 | * @flogi: The FLOGI command | |
357 | * @op: The opcode | |
42e9a92f | 358 | */ |
3a3b42bf RL |
359 | static void fc_lport_flogi_fill(struct fc_lport *lport, |
360 | struct fc_els_flogi *flogi, | |
361 | unsigned int op) | |
42e9a92f RL |
362 | { |
363 | struct fc_els_csp *sp; | |
364 | struct fc_els_cssp *cp; | |
365 | ||
366 | memset(flogi, 0, sizeof(*flogi)); | |
367 | flogi->fl_cmd = (u8) op; | |
368 | put_unaligned_be64(lport->wwpn, &flogi->fl_wwpn); | |
369 | put_unaligned_be64(lport->wwnn, &flogi->fl_wwnn); | |
370 | sp = &flogi->fl_csp; | |
371 | sp->sp_hi_ver = 0x20; | |
372 | sp->sp_lo_ver = 0x20; | |
373 | sp->sp_bb_cred = htons(10); /* this gets set by gateway */ | |
374 | sp->sp_bb_data = htons((u16) lport->mfs); | |
375 | cp = &flogi->fl_cssp[3 - 1]; /* class 3 parameters */ | |
376 | cp->cp_class = htons(FC_CPC_VALID | FC_CPC_SEQ); | |
377 | if (op != ELS_FLOGI) { | |
378 | sp->sp_features = htons(FC_SP_FT_CIRO); | |
379 | sp->sp_tot_seq = htons(255); /* seq. we accept */ | |
380 | sp->sp_rel_off = htons(0x1f); | |
381 | sp->sp_e_d_tov = htonl(lport->e_d_tov); | |
382 | ||
383 | cp->cp_rdfs = htons((u16) lport->mfs); | |
384 | cp->cp_con_seq = htons(255); | |
385 | cp->cp_open_seq = 1; | |
386 | } | |
387 | } | |
388 | ||
3a3b42bf RL |
389 | /** |
390 | * fc_lport_add_fc4_type() - Add a supported FC-4 type to a local port | |
391 | * @lport: The local port to add a new FC-4 type to | |
392 | * @type: The new FC-4 type | |
42e9a92f RL |
393 | */ |
394 | static void fc_lport_add_fc4_type(struct fc_lport *lport, enum fc_fh_type type) | |
395 | { | |
396 | __be32 *mp; | |
397 | ||
398 | mp = &lport->fcts.ff_type_map[type / FC_NS_BPW]; | |
399 | *mp = htonl(ntohl(*mp) | 1UL << (type % FC_NS_BPW)); | |
400 | } | |
401 | ||
402 | /** | |
34f42a07 | 403 | * fc_lport_recv_rlir_req() - Handle received Registered Link Incident Report. |
25985edc | 404 | * @lport: Fibre Channel local port receiving the RLIR |
92261156 | 405 | * @fp: The RLIR request frame |
42e9a92f | 406 | * |
1b69bc06 | 407 | * Locking Note: The lport lock is expected to be held before calling |
42e9a92f RL |
408 | * this function. |
409 | */ | |
92261156 | 410 | static void fc_lport_recv_rlir_req(struct fc_lport *lport, struct fc_frame *fp) |
42e9a92f | 411 | { |
7414705e RL |
412 | FC_LPORT_DBG(lport, "Received RLIR request while in state %s\n", |
413 | fc_lport_state(lport)); | |
42e9a92f | 414 | |
7ab24dd1 | 415 | fc_seq_els_rsp_send(fp, ELS_LS_ACC, NULL); |
42e9a92f RL |
416 | fc_frame_free(fp); |
417 | } | |
418 | ||
419 | /** | |
34f42a07 | 420 | * fc_lport_recv_echo_req() - Handle received ECHO request |
25985edc | 421 | * @lport: The local port receiving the ECHO |
92261156 | 422 | * @fp: ECHO request frame |
42e9a92f | 423 | * |
1b69bc06 | 424 | * Locking Note: The lport lock is expected to be held before calling |
42e9a92f RL |
425 | * this function. |
426 | */ | |
92261156 JE |
427 | static void fc_lport_recv_echo_req(struct fc_lport *lport, |
428 | struct fc_frame *in_fp) | |
42e9a92f RL |
429 | { |
430 | struct fc_frame *fp; | |
42e9a92f RL |
431 | unsigned int len; |
432 | void *pp; | |
433 | void *dp; | |
42e9a92f | 434 | |
1b69bc06 | 435 | FC_LPORT_DBG(lport, "Received ECHO request while in state %s\n", |
7414705e | 436 | fc_lport_state(lport)); |
42e9a92f RL |
437 | |
438 | len = fr_len(in_fp) - sizeof(struct fc_frame_header); | |
439 | pp = fc_frame_payload_get(in_fp, len); | |
440 | ||
441 | if (len < sizeof(__be32)) | |
442 | len = sizeof(__be32); | |
443 | ||
444 | fp = fc_frame_alloc(lport, len); | |
445 | if (fp) { | |
446 | dp = fc_frame_payload_get(fp, len); | |
447 | memcpy(dp, pp, len); | |
1b69bc06 | 448 | *((__be32 *)dp) = htonl(ELS_LS_ACC << 24); |
24f089e2 JE |
449 | fc_fill_reply_hdr(fp, in_fp, FC_RCTL_ELS_REP, 0); |
450 | lport->tt.frame_send(lport, fp); | |
42e9a92f RL |
451 | } |
452 | fc_frame_free(in_fp); | |
453 | } | |
454 | ||
455 | /** | |
1b69bc06 | 456 | * fc_lport_recv_rnid_req() - Handle received Request Node ID data request |
25985edc | 457 | * @lport: The local port receiving the RNID |
92261156 | 458 | * @fp: The RNID request frame |
42e9a92f | 459 | * |
1b69bc06 | 460 | * Locking Note: The lport lock is expected to be held before calling |
42e9a92f RL |
461 | * this function. |
462 | */ | |
92261156 JE |
463 | static void fc_lport_recv_rnid_req(struct fc_lport *lport, |
464 | struct fc_frame *in_fp) | |
42e9a92f RL |
465 | { |
466 | struct fc_frame *fp; | |
42e9a92f RL |
467 | struct fc_els_rnid *req; |
468 | struct { | |
469 | struct fc_els_rnid_resp rnid; | |
470 | struct fc_els_rnid_cid cid; | |
471 | struct fc_els_rnid_gen gen; | |
472 | } *rp; | |
473 | struct fc_seq_els_data rjt_data; | |
474 | u8 fmt; | |
475 | size_t len; | |
42e9a92f | 476 | |
7414705e RL |
477 | FC_LPORT_DBG(lport, "Received RNID request while in state %s\n", |
478 | fc_lport_state(lport)); | |
42e9a92f RL |
479 | |
480 | req = fc_frame_payload_get(in_fp, sizeof(*req)); | |
481 | if (!req) { | |
42e9a92f RL |
482 | rjt_data.reason = ELS_RJT_LOGIC; |
483 | rjt_data.explan = ELS_EXPL_NONE; | |
7ab24dd1 | 484 | fc_seq_els_rsp_send(in_fp, ELS_LS_RJT, &rjt_data); |
42e9a92f RL |
485 | } else { |
486 | fmt = req->rnid_fmt; | |
487 | len = sizeof(*rp); | |
488 | if (fmt != ELS_RNIDF_GEN || | |
489 | ntohl(lport->rnid_gen.rnid_atype) == 0) { | |
490 | fmt = ELS_RNIDF_NONE; /* nothing to provide */ | |
491 | len -= sizeof(rp->gen); | |
492 | } | |
493 | fp = fc_frame_alloc(lport, len); | |
494 | if (fp) { | |
495 | rp = fc_frame_payload_get(fp, len); | |
496 | memset(rp, 0, len); | |
497 | rp->rnid.rnid_cmd = ELS_LS_ACC; | |
498 | rp->rnid.rnid_fmt = fmt; | |
499 | rp->rnid.rnid_cid_len = sizeof(rp->cid); | |
500 | rp->cid.rnid_wwpn = htonll(lport->wwpn); | |
501 | rp->cid.rnid_wwnn = htonll(lport->wwnn); | |
502 | if (fmt == ELS_RNIDF_GEN) { | |
503 | rp->rnid.rnid_sid_len = sizeof(rp->gen); | |
504 | memcpy(&rp->gen, &lport->rnid_gen, | |
505 | sizeof(rp->gen)); | |
506 | } | |
24f089e2 JE |
507 | fc_fill_reply_hdr(fp, in_fp, FC_RCTL_ELS_REP, 0); |
508 | lport->tt.frame_send(lport, fp); | |
42e9a92f RL |
509 | } |
510 | } | |
511 | fc_frame_free(in_fp); | |
512 | } | |
513 | ||
42e9a92f | 514 | /** |
34f42a07 | 515 | * fc_lport_recv_logo_req() - Handle received fabric LOGO request |
25985edc | 516 | * @lport: The local port receiving the LOGO |
92261156 | 517 | * @fp: The LOGO request frame |
42e9a92f | 518 | * |
c1d45424 | 519 | * Locking Note: The lport lock is expected to be held before calling |
42e9a92f RL |
520 | * this function. |
521 | */ | |
92261156 | 522 | static void fc_lport_recv_logo_req(struct fc_lport *lport, struct fc_frame *fp) |
42e9a92f | 523 | { |
7ab24dd1 | 524 | fc_seq_els_rsp_send(fp, ELS_LS_ACC, NULL); |
42e9a92f RL |
525 | fc_lport_enter_reset(lport); |
526 | fc_frame_free(fp); | |
527 | } | |
528 | ||
529 | /** | |
34f42a07 | 530 | * fc_fabric_login() - Start the lport state machine |
3a3b42bf | 531 | * @lport: The local port that should log into the fabric |
42e9a92f RL |
532 | * |
533 | * Locking Note: This function should not be called | |
534 | * with the lport lock held. | |
535 | */ | |
536 | int fc_fabric_login(struct fc_lport *lport) | |
537 | { | |
538 | int rc = -1; | |
539 | ||
540 | mutex_lock(&lport->lp_mutex); | |
55a66d3c VD |
541 | if (lport->state == LPORT_ST_DISABLED || |
542 | lport->state == LPORT_ST_LOGO) { | |
543 | fc_lport_state_enter(lport, LPORT_ST_RESET); | |
42e9a92f RL |
544 | fc_lport_enter_reset(lport); |
545 | rc = 0; | |
546 | } | |
547 | mutex_unlock(&lport->lp_mutex); | |
548 | ||
549 | return rc; | |
550 | } | |
551 | EXPORT_SYMBOL(fc_fabric_login); | |
552 | ||
553 | /** | |
8faecddb | 554 | * __fc_linkup() - Handler for transport linkup events |
42e9a92f | 555 | * @lport: The lport whose link is up |
8faecddb CL |
556 | * |
557 | * Locking: must be called with the lp_mutex held | |
42e9a92f | 558 | */ |
8faecddb | 559 | void __fc_linkup(struct fc_lport *lport) |
42e9a92f | 560 | { |
bc0e17f6 VD |
561 | if (!lport->link_up) { |
562 | lport->link_up = 1; | |
42e9a92f RL |
563 | |
564 | if (lport->state == LPORT_ST_RESET) | |
565 | fc_lport_enter_flogi(lport); | |
566 | } | |
8faecddb CL |
567 | } |
568 | ||
569 | /** | |
570 | * fc_linkup() - Handler for transport linkup events | |
3a3b42bf | 571 | * @lport: The local port whose link is up |
8faecddb CL |
572 | */ |
573 | void fc_linkup(struct fc_lport *lport) | |
574 | { | |
ce8b5df0 | 575 | printk(KERN_INFO "host%d: libfc: Link up on port (%6.6x)\n", |
7b2787ec | 576 | lport->host->host_no, lport->port_id); |
8faecddb CL |
577 | |
578 | mutex_lock(&lport->lp_mutex); | |
579 | __fc_linkup(lport); | |
42e9a92f RL |
580 | mutex_unlock(&lport->lp_mutex); |
581 | } | |
582 | EXPORT_SYMBOL(fc_linkup); | |
583 | ||
584 | /** | |
8faecddb | 585 | * __fc_linkdown() - Handler for transport linkdown events |
42e9a92f | 586 | * @lport: The lport whose link is down |
8faecddb CL |
587 | * |
588 | * Locking: must be called with the lp_mutex held | |
42e9a92f | 589 | */ |
8faecddb | 590 | void __fc_linkdown(struct fc_lport *lport) |
42e9a92f | 591 | { |
bc0e17f6 VD |
592 | if (lport->link_up) { |
593 | lport->link_up = 0; | |
42e9a92f RL |
594 | fc_lport_enter_reset(lport); |
595 | lport->tt.fcp_cleanup(lport); | |
596 | } | |
8faecddb CL |
597 | } |
598 | ||
599 | /** | |
600 | * fc_linkdown() - Handler for transport linkdown events | |
3a3b42bf | 601 | * @lport: The local port whose link is down |
8faecddb CL |
602 | */ |
603 | void fc_linkdown(struct fc_lport *lport) | |
604 | { | |
ce8b5df0 | 605 | printk(KERN_INFO "host%d: libfc: Link down on port (%6.6x)\n", |
7b2787ec | 606 | lport->host->host_no, lport->port_id); |
8faecddb CL |
607 | |
608 | mutex_lock(&lport->lp_mutex); | |
609 | __fc_linkdown(lport); | |
42e9a92f RL |
610 | mutex_unlock(&lport->lp_mutex); |
611 | } | |
612 | EXPORT_SYMBOL(fc_linkdown); | |
613 | ||
42e9a92f | 614 | /** |
34f42a07 | 615 | * fc_fabric_logoff() - Logout of the fabric |
3a3b42bf | 616 | * @lport: The local port to logoff the fabric |
42e9a92f RL |
617 | * |
618 | * Return value: | |
619 | * 0 for success, -1 for failure | |
34f42a07 | 620 | */ |
42e9a92f RL |
621 | int fc_fabric_logoff(struct fc_lport *lport) |
622 | { | |
623 | lport->tt.disc_stop_final(lport); | |
624 | mutex_lock(&lport->lp_mutex); | |
3a3b42bf | 625 | if (lport->dns_rdata) |
c96c792a | 626 | fc_rport_logoff(lport->dns_rdata); |
a0fd2e49 | 627 | mutex_unlock(&lport->lp_mutex); |
5922a957 | 628 | fc_rport_flush_queue(); |
a0fd2e49 | 629 | mutex_lock(&lport->lp_mutex); |
42e9a92f RL |
630 | fc_lport_enter_logo(lport); |
631 | mutex_unlock(&lport->lp_mutex); | |
f7db2c15 | 632 | cancel_delayed_work_sync(&lport->retry_work); |
42e9a92f RL |
633 | return 0; |
634 | } | |
635 | EXPORT_SYMBOL(fc_fabric_logoff); | |
636 | ||
637 | /** | |
3a3b42bf RL |
638 | * fc_lport_destroy() - Unregister a fc_lport |
639 | * @lport: The local port to unregister | |
42e9a92f | 640 | * |
42e9a92f RL |
641 | * Note: |
642 | * exit routine for fc_lport instance | |
643 | * clean-up all the allocated memory | |
644 | * and free up other system resources. | |
645 | * | |
34f42a07 | 646 | */ |
42e9a92f RL |
647 | int fc_lport_destroy(struct fc_lport *lport) |
648 | { | |
bbf15669 | 649 | mutex_lock(&lport->lp_mutex); |
b1d9fd55 | 650 | lport->state = LPORT_ST_DISABLED; |
bbf15669 | 651 | lport->link_up = 0; |
42e9a92f | 652 | lport->tt.frame_send = fc_frame_drop; |
bbf15669 AJ |
653 | mutex_unlock(&lport->lp_mutex); |
654 | ||
42e9a92f | 655 | lport->tt.fcp_abort_io(lport); |
e9ba8b42 | 656 | lport->tt.disc_stop_final(lport); |
1f6ff364 | 657 | lport->tt.exch_mgr_reset(lport, 0, 0); |
061446a1 | 658 | cancel_delayed_work_sync(&lport->retry_work); |
70d53b04 | 659 | fc_fc4_del_lport(lport); |
42e9a92f RL |
660 | return 0; |
661 | } | |
662 | EXPORT_SYMBOL(fc_lport_destroy); | |
663 | ||
664 | /** | |
3a3b42bf RL |
665 | * fc_set_mfs() - Set the maximum frame size for a local port |
666 | * @lport: The local port to set the MFS for | |
667 | * @mfs: The new MFS | |
34f42a07 | 668 | */ |
42e9a92f RL |
669 | int fc_set_mfs(struct fc_lport *lport, u32 mfs) |
670 | { | |
671 | unsigned int old_mfs; | |
672 | int rc = -EINVAL; | |
673 | ||
674 | mutex_lock(&lport->lp_mutex); | |
675 | ||
676 | old_mfs = lport->mfs; | |
677 | ||
678 | if (mfs >= FC_MIN_MAX_FRAME) { | |
679 | mfs &= ~3; | |
680 | if (mfs > FC_MAX_FRAME) | |
681 | mfs = FC_MAX_FRAME; | |
682 | mfs -= sizeof(struct fc_frame_header); | |
683 | lport->mfs = mfs; | |
684 | rc = 0; | |
685 | } | |
686 | ||
687 | if (!rc && mfs < old_mfs) | |
688 | fc_lport_enter_reset(lport); | |
689 | ||
690 | mutex_unlock(&lport->lp_mutex); | |
691 | ||
692 | return rc; | |
693 | } | |
694 | EXPORT_SYMBOL(fc_set_mfs); | |
695 | ||
696 | /** | |
34f42a07 | 697 | * fc_lport_disc_callback() - Callback for discovery events |
3a3b42bf | 698 | * @lport: The local port receiving the event |
42e9a92f RL |
699 | * @event: The discovery event |
700 | */ | |
c6b21c93 BVA |
701 | static void fc_lport_disc_callback(struct fc_lport *lport, |
702 | enum fc_disc_event event) | |
42e9a92f RL |
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", |
7b2787ec | 711 | lport->host->host_no, lport->port_id); |
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 | ||
7b2787ec RL |
759 | lport->port_id = port_id; |
760 | ||
761 | /* Update the fc_host */ | |
093bb6a2 | 762 | fc_host_port_id(lport->host) = port_id; |
7b2787ec | 763 | |
093bb6a2 JE |
764 | if (lport->tt.lport_set_port_id) |
765 | lport->tt.lport_set_port_id(lport, port_id, fp); | |
766 | } | |
767 | ||
3726f358 JE |
768 | /** |
769 | * fc_lport_set_port_id() - set the local port Port ID for point-to-multipoint | |
770 | * @lport: The local port which will have its Port ID set. | |
771 | * @port_id: The new port ID. | |
772 | * | |
773 | * Called by the lower-level driver when transport sets the local port_id. | |
774 | * This is used in VN_port to VN_port mode for FCoE, and causes FLOGI and | |
775 | * discovery to be skipped. | |
776 | */ | |
777 | void fc_lport_set_local_id(struct fc_lport *lport, u32 port_id) | |
778 | { | |
779 | mutex_lock(&lport->lp_mutex); | |
780 | ||
781 | fc_lport_set_port_id(lport, port_id, NULL); | |
782 | ||
783 | switch (lport->state) { | |
784 | case LPORT_ST_RESET: | |
785 | case LPORT_ST_FLOGI: | |
786 | if (port_id) | |
787 | fc_lport_enter_ready(lport); | |
788 | break; | |
789 | default: | |
790 | break; | |
791 | } | |
792 | mutex_unlock(&lport->lp_mutex); | |
793 | } | |
794 | EXPORT_SYMBOL(fc_lport_set_local_id); | |
795 | ||
42e9a92f | 796 | /** |
34f42a07 | 797 | * fc_lport_recv_flogi_req() - Receive a FLOGI request |
25985edc | 798 | * @lport: The local port that received the request |
92261156 | 799 | * @rx_fp: The FLOGI frame |
42e9a92f RL |
800 | * |
801 | * A received FLOGI request indicates a point-to-point connection. | |
802 | * Accept it with the common service parameters indicating our N port. | |
803 | * Set up to do a PLOGI if we have the higher-number WWPN. | |
804 | * | |
1b69bc06 | 805 | * Locking Note: The lport lock is expected to be held before calling |
42e9a92f RL |
806 | * this function. |
807 | */ | |
92261156 JE |
808 | static void fc_lport_recv_flogi_req(struct fc_lport *lport, |
809 | struct fc_frame *rx_fp) | |
42e9a92f RL |
810 | { |
811 | struct fc_frame *fp; | |
24f089e2 | 812 | struct fc_frame_header *fh; |
42e9a92f RL |
813 | struct fc_els_flogi *flp; |
814 | struct fc_els_flogi *new_flp; | |
815 | u64 remote_wwpn; | |
816 | u32 remote_fid; | |
817 | u32 local_fid; | |
42e9a92f | 818 | |
7414705e RL |
819 | FC_LPORT_DBG(lport, "Received FLOGI request while in state %s\n", |
820 | fc_lport_state(lport)); | |
42e9a92f | 821 | |
251748a9 | 822 | remote_fid = fc_frame_sid(rx_fp); |
42e9a92f RL |
823 | flp = fc_frame_payload_get(rx_fp, sizeof(*flp)); |
824 | if (!flp) | |
825 | goto out; | |
826 | remote_wwpn = get_unaligned_be64(&flp->fl_wwpn); | |
827 | if (remote_wwpn == lport->wwpn) { | |
e6d8a1b0 | 828 | printk(KERN_WARNING "host%d: libfc: Received FLOGI from port " |
9f8f3aa6 | 829 | "with same WWPN %16.16llx\n", |
e6d8a1b0 | 830 | lport->host->host_no, remote_wwpn); |
42e9a92f RL |
831 | goto out; |
832 | } | |
9f8f3aa6 | 833 | FC_LPORT_DBG(lport, "FLOGI from port WWPN %16.16llx\n", remote_wwpn); |
42e9a92f RL |
834 | |
835 | /* | |
836 | * XXX what is the right thing to do for FIDs? | |
837 | * The originator might expect our S_ID to be 0xfffffe. | |
838 | * But if so, both of us could end up with the same FID. | |
839 | */ | |
840 | local_fid = FC_LOCAL_PTP_FID_LO; | |
841 | if (remote_wwpn < lport->wwpn) { | |
842 | local_fid = FC_LOCAL_PTP_FID_HI; | |
843 | if (!remote_fid || remote_fid == local_fid) | |
844 | remote_fid = FC_LOCAL_PTP_FID_LO; | |
845 | } else if (!remote_fid) { | |
846 | remote_fid = FC_LOCAL_PTP_FID_HI; | |
847 | } | |
848 | ||
093bb6a2 | 849 | fc_lport_set_port_id(lport, local_fid, rx_fp); |
42e9a92f RL |
850 | |
851 | fp = fc_frame_alloc(lport, sizeof(*flp)); | |
852 | if (fp) { | |
42e9a92f RL |
853 | new_flp = fc_frame_payload_get(fp, sizeof(*flp)); |
854 | fc_lport_flogi_fill(lport, new_flp, ELS_FLOGI); | |
855 | new_flp->fl_cmd = (u8) ELS_LS_ACC; | |
856 | ||
857 | /* | |
858 | * Send the response. If this fails, the originator should | |
859 | * repeat the sequence. | |
860 | */ | |
24f089e2 JE |
861 | fc_fill_reply_hdr(fp, rx_fp, FC_RCTL_ELS_REP, 0); |
862 | fh = fc_frame_header_get(fp); | |
863 | hton24(fh->fh_s_id, local_fid); | |
864 | hton24(fh->fh_d_id, remote_fid); | |
865 | lport->tt.frame_send(lport, fp); | |
42e9a92f RL |
866 | |
867 | } else { | |
868 | fc_lport_error(lport, fp); | |
869 | } | |
870 | fc_lport_ptp_setup(lport, remote_fid, remote_wwpn, | |
871 | get_unaligned_be64(&flp->fl_wwnn)); | |
42e9a92f | 872 | out: |
42e9a92f RL |
873 | fc_frame_free(rx_fp); |
874 | } | |
875 | ||
876 | /** | |
96ad8464 | 877 | * fc_lport_recv_els_req() - The generic lport ELS request handler |
3a3b42bf | 878 | * @lport: The local port that received the request |
3a3b42bf | 879 | * @fp: The request frame |
42e9a92f RL |
880 | * |
881 | * This function will see if the lport handles the request or | |
882 | * if an rport should handle the request. | |
883 | * | |
884 | * Locking Note: This function should not be called with the lport | |
25985edc | 885 | * lock held because it will grab the lock. |
42e9a92f | 886 | */ |
96ad8464 JE |
887 | static void fc_lport_recv_els_req(struct fc_lport *lport, |
888 | struct fc_frame *fp) | |
42e9a92f | 889 | { |
92261156 | 890 | void (*recv)(struct fc_lport *, struct fc_frame *); |
42e9a92f RL |
891 | |
892 | mutex_lock(&lport->lp_mutex); | |
893 | ||
894 | /* | |
895 | * Handle special ELS cases like FLOGI, LOGO, and | |
896 | * RSCN here. These don't require a session. | |
897 | * Even if we had a session, it might not be ready. | |
898 | */ | |
e9ba8b42 JE |
899 | if (!lport->link_up) |
900 | fc_frame_free(fp); | |
96ad8464 | 901 | else { |
42e9a92f RL |
902 | /* |
903 | * Check opcode. | |
904 | */ | |
e76ee65f | 905 | recv = fc_rport_recv_req; |
42e9a92f RL |
906 | switch (fc_frame_payload_op(fp)) { |
907 | case ELS_FLOGI: | |
a7b12a27 JE |
908 | if (!lport->point_to_multipoint) |
909 | recv = fc_lport_recv_flogi_req; | |
42e9a92f RL |
910 | break; |
911 | case ELS_LOGO: | |
251748a9 | 912 | if (fc_frame_sid(fp) == FC_FID_FLOGI) |
42e9a92f RL |
913 | recv = fc_lport_recv_logo_req; |
914 | break; | |
915 | case ELS_RSCN: | |
916 | recv = lport->tt.disc_recv_req; | |
917 | break; | |
918 | case ELS_ECHO: | |
919 | recv = fc_lport_recv_echo_req; | |
920 | break; | |
921 | case ELS_RLIR: | |
922 | recv = fc_lport_recv_rlir_req; | |
923 | break; | |
924 | case ELS_RNID: | |
925 | recv = fc_lport_recv_rnid_req; | |
926 | break; | |
42e9a92f RL |
927 | } |
928 | ||
92261156 | 929 | recv(lport, fp); |
42e9a92f RL |
930 | } |
931 | mutex_unlock(&lport->lp_mutex); | |
42e9a92f RL |
932 | } |
933 | ||
96ad8464 JE |
934 | static int fc_lport_els_prli(struct fc_rport_priv *rdata, u32 spp_len, |
935 | const struct fc_els_spp *spp_in, | |
936 | struct fc_els_spp *spp_out) | |
937 | { | |
938 | return FC_SPP_RESP_INVL; | |
939 | } | |
940 | ||
941 | struct fc4_prov fc_lport_els_prov = { | |
942 | .prli = fc_lport_els_prli, | |
943 | .recv = fc_lport_recv_els_req, | |
944 | }; | |
945 | ||
946 | /** | |
c5cb444c | 947 | * fc_lport_recv() - The generic lport request handler |
96ad8464 JE |
948 | * @lport: The lport that received the request |
949 | * @fp: The frame the request is in | |
950 | * | |
951 | * Locking Note: This function should not be called with the lport | |
25985edc | 952 | * lock held because it may grab the lock. |
96ad8464 | 953 | */ |
c5cb444c | 954 | void fc_lport_recv(struct fc_lport *lport, struct fc_frame *fp) |
96ad8464 JE |
955 | { |
956 | struct fc_frame_header *fh = fc_frame_header_get(fp); | |
957 | struct fc_seq *sp = fr_seq(fp); | |
958 | struct fc4_prov *prov; | |
959 | ||
960 | /* | |
961 | * Use RCU read lock and module_lock to be sure module doesn't | |
962 | * deregister and get unloaded while we're calling it. | |
963 | * try_module_get() is inlined and accepts a NULL parameter. | |
964 | * Only ELSes and FCP target ops should come through here. | |
965 | * The locking is unfortunate, and a better scheme is being sought. | |
966 | */ | |
967 | ||
968 | rcu_read_lock(); | |
969 | if (fh->fh_type >= FC_FC4_PROV_SIZE) | |
970 | goto drop; | |
971 | prov = rcu_dereference(fc_passive_prov[fh->fh_type]); | |
972 | if (!prov || !try_module_get(prov->module)) | |
973 | goto drop; | |
974 | rcu_read_unlock(); | |
975 | prov->recv(lport, fp); | |
976 | module_put(prov->module); | |
977 | return; | |
978 | drop: | |
979 | rcu_read_unlock(); | |
980 | FC_LPORT_DBG(lport, "dropping unexpected frame type %x\n", fh->fh_type); | |
981 | fc_frame_free(fp); | |
db95fc00 | 982 | if (sp) |
768c72cc | 983 | fc_exch_done(sp); |
96ad8464 | 984 | } |
c5cb444c | 985 | EXPORT_SYMBOL(fc_lport_recv); |
96ad8464 | 986 | |
42e9a92f | 987 | /** |
3a3b42bf RL |
988 | * fc_lport_reset() - Reset a local port |
989 | * @lport: The local port which should be reset | |
42e9a92f RL |
990 | * |
991 | * Locking Note: This functions should not be called with the | |
992 | * lport lock held. | |
993 | */ | |
994 | int fc_lport_reset(struct fc_lport *lport) | |
995 | { | |
f7db2c15 | 996 | cancel_delayed_work_sync(&lport->retry_work); |
42e9a92f RL |
997 | mutex_lock(&lport->lp_mutex); |
998 | fc_lport_enter_reset(lport); | |
999 | mutex_unlock(&lport->lp_mutex); | |
1000 | return 0; | |
1001 | } | |
1002 | EXPORT_SYMBOL(fc_lport_reset); | |
1003 | ||
1004 | /** | |
3a3b42bf RL |
1005 | * fc_lport_reset_locked() - Reset the local port w/ the lport lock held |
1006 | * @lport: The local port to be reset | |
42e9a92f RL |
1007 | * |
1008 | * Locking Note: The lport lock is expected to be held before calling | |
1009 | * this routine. | |
1010 | */ | |
1190d925 | 1011 | static void fc_lport_reset_locked(struct fc_lport *lport) |
42e9a92f | 1012 | { |
a407c593 | 1013 | if (lport->dns_rdata) { |
c96c792a | 1014 | fc_rport_logoff(lport->dns_rdata); |
a407c593 HR |
1015 | lport->dns_rdata = NULL; |
1016 | } | |
42e9a92f | 1017 | |
2f2ac4a0 | 1018 | if (lport->ptp_rdata) { |
c96c792a | 1019 | fc_rport_logoff(lport->ptp_rdata); |
944ef968 | 1020 | kref_put(&lport->ptp_rdata->kref, fc_rport_destroy); |
2f2ac4a0 JE |
1021 | lport->ptp_rdata = NULL; |
1022 | } | |
42e9a92f RL |
1023 | |
1024 | lport->tt.disc_stop(lport); | |
1025 | ||
1f6ff364 | 1026 | lport->tt.exch_mgr_reset(lport, 0, 0); |
42e9a92f | 1027 | fc_host_fabric_name(lport->host) = 0; |
093bb6a2 | 1028 | |
3726f358 | 1029 | if (lport->port_id && (!lport->point_to_multipoint || !lport->link_up)) |
093bb6a2 | 1030 | fc_lport_set_port_id(lport, 0, NULL); |
1190d925 | 1031 | } |
42e9a92f | 1032 | |
1190d925 JE |
1033 | /** |
1034 | * fc_lport_enter_reset() - Reset the local port | |
3a3b42bf | 1035 | * @lport: The local port to be reset |
1190d925 JE |
1036 | * |
1037 | * Locking Note: The lport lock is expected to be held before calling | |
1038 | * this routine. | |
1039 | */ | |
1040 | static void fc_lport_enter_reset(struct fc_lport *lport) | |
1041 | { | |
1042 | FC_LPORT_DBG(lport, "Entered RESET state from %s state\n", | |
1043 | fc_lport_state(lport)); | |
1044 | ||
55a66d3c VD |
1045 | if (lport->state == LPORT_ST_DISABLED || lport->state == LPORT_ST_LOGO) |
1046 | return; | |
1047 | ||
8faecddb CL |
1048 | if (lport->vport) { |
1049 | if (lport->link_up) | |
1050 | fc_vport_set_state(lport->vport, FC_VPORT_INITIALIZING); | |
1051 | else | |
1052 | fc_vport_set_state(lport->vport, FC_VPORT_LINKDOWN); | |
1053 | } | |
1190d925 | 1054 | fc_lport_state_enter(lport, LPORT_ST_RESET); |
9b7d1613 VD |
1055 | fc_host_post_event(lport->host, fc_get_event_number(), |
1056 | FCH_EVT_LIPRESET, 0); | |
8faecddb | 1057 | fc_vports_linkchange(lport); |
1190d925 | 1058 | fc_lport_reset_locked(lport); |
b6e3c840 | 1059 | if (lport->link_up) |
42e9a92f RL |
1060 | fc_lport_enter_flogi(lport); |
1061 | } | |
1062 | ||
1190d925 | 1063 | /** |
3a3b42bf RL |
1064 | * fc_lport_enter_disabled() - Disable the local port |
1065 | * @lport: The local port to be reset | |
1190d925 JE |
1066 | * |
1067 | * Locking Note: The lport lock is expected to be held before calling | |
1068 | * this routine. | |
1069 | */ | |
1070 | static void fc_lport_enter_disabled(struct fc_lport *lport) | |
1071 | { | |
1072 | FC_LPORT_DBG(lport, "Entered disabled state from %s state\n", | |
1073 | fc_lport_state(lport)); | |
1074 | ||
1075 | fc_lport_state_enter(lport, LPORT_ST_DISABLED); | |
8faecddb | 1076 | fc_vports_linkchange(lport); |
1190d925 JE |
1077 | fc_lport_reset_locked(lport); |
1078 | } | |
1079 | ||
42e9a92f | 1080 | /** |
34f42a07 | 1081 | * fc_lport_error() - Handler for any errors |
3a3b42bf RL |
1082 | * @lport: The local port that the error was on |
1083 | * @fp: The error code encoded in a frame pointer | |
42e9a92f RL |
1084 | * |
1085 | * If the error was caused by a resource allocation failure | |
1086 | * then wait for half a second and retry, otherwise retry | |
1087 | * after the e_d_tov time. | |
1088 | */ | |
1089 | static void fc_lport_error(struct fc_lport *lport, struct fc_frame *fp) | |
1090 | { | |
1091 | unsigned long delay = 0; | |
7414705e | 1092 | FC_LPORT_DBG(lport, "Error %ld in state %s, retries %d\n", |
b20d9bfd | 1093 | IS_ERR(fp) ? -PTR_ERR(fp) : 0, fc_lport_state(lport), |
7414705e | 1094 | lport->retry_count); |
42e9a92f | 1095 | |
7f985231 BPG |
1096 | if (PTR_ERR(fp) == -FC_EX_CLOSED) |
1097 | return; | |
1098 | ||
1099 | /* | |
1100 | * Memory allocation failure, or the exchange timed out | |
1101 | * or we received LS_RJT. | |
1102 | * Retry after delay | |
1103 | */ | |
1104 | if (lport->retry_count < lport->max_retry_count) { | |
1105 | lport->retry_count++; | |
1106 | if (!fp) | |
1107 | delay = msecs_to_jiffies(500); | |
1108 | else | |
1109 | delay = msecs_to_jiffies(lport->e_d_tov); | |
1110 | ||
1111 | schedule_delayed_work(&lport->retry_work, delay); | |
1112 | } else | |
1113 | fc_lport_enter_reset(lport); | |
42e9a92f RL |
1114 | } |
1115 | ||
1116 | /** | |
7cccc157 | 1117 | * fc_lport_ns_resp() - Handle response to a name server |
3a3b42bf RL |
1118 | * registration exchange |
1119 | * @sp: current sequence in exchange | |
1120 | * @fp: response frame | |
42e9a92f RL |
1121 | * @lp_arg: Fibre Channel host port instance |
1122 | * | |
1123 | * Locking Note: This function will be called without the lport lock | |
3a3b42bf | 1124 | * held, but it will lock, call an _enter_* function or fc_lport_error() |
42e9a92f RL |
1125 | * and then unlock the lport. |
1126 | */ | |
7cccc157 CL |
1127 | static void fc_lport_ns_resp(struct fc_seq *sp, struct fc_frame *fp, |
1128 | void *lp_arg) | |
42e9a92f RL |
1129 | { |
1130 | struct fc_lport *lport = lp_arg; | |
1131 | struct fc_frame_header *fh; | |
1132 | struct fc_ct_hdr *ct; | |
1133 | ||
7cccc157 | 1134 | FC_LPORT_DBG(lport, "Received a ns %s\n", fc_els_resp_type(fp)); |
f657d299 | 1135 | |
42e9a92f RL |
1136 | if (fp == ERR_PTR(-FC_EX_CLOSED)) |
1137 | return; | |
1138 | ||
1139 | mutex_lock(&lport->lp_mutex); | |
1140 | ||
ab593b18 | 1141 | if (lport->state < LPORT_ST_RNN_ID || lport->state > LPORT_ST_RFF_ID) { |
7cccc157 | 1142 | FC_LPORT_DBG(lport, "Received a name server response, " |
3a3b42bf | 1143 | "but in state %s\n", fc_lport_state(lport)); |
76f6804e AJ |
1144 | if (IS_ERR(fp)) |
1145 | goto err; | |
42e9a92f RL |
1146 | goto out; |
1147 | } | |
1148 | ||
76f6804e AJ |
1149 | if (IS_ERR(fp)) { |
1150 | fc_lport_error(lport, fp); | |
1151 | goto err; | |
1152 | } | |
1153 | ||
42e9a92f RL |
1154 | fh = fc_frame_header_get(fp); |
1155 | ct = fc_frame_payload_get(fp, sizeof(*ct)); | |
1156 | ||
1157 | if (fh && ct && fh->fh_type == FC_TYPE_CT && | |
1158 | ct->ct_fs_type == FC_FST_DIR && | |
1159 | ct->ct_fs_subtype == FC_NS_SUBTYPE && | |
1160 | ntohs(ct->ct_cmd) == FC_FS_ACC) | |
7cccc157 CL |
1161 | switch (lport->state) { |
1162 | case LPORT_ST_RNN_ID: | |
c914f7d1 | 1163 | fc_lport_enter_ns(lport, LPORT_ST_RSNN_NN); |
7cccc157 CL |
1164 | break; |
1165 | case LPORT_ST_RSNN_NN: | |
c914f7d1 | 1166 | fc_lport_enter_ns(lport, LPORT_ST_RSPN_ID); |
7cccc157 CL |
1167 | break; |
1168 | case LPORT_ST_RSPN_ID: | |
c914f7d1 | 1169 | fc_lport_enter_ns(lport, LPORT_ST_RFT_ID); |
7cccc157 CL |
1170 | break; |
1171 | case LPORT_ST_RFT_ID: | |
ab593b18 JE |
1172 | fc_lport_enter_ns(lport, LPORT_ST_RFF_ID); |
1173 | break; | |
1174 | case LPORT_ST_RFF_ID: | |
d78c317f NP |
1175 | if (lport->fdmi_enabled) |
1176 | fc_lport_enter_fdmi(lport); | |
1177 | else | |
1178 | fc_lport_enter_scr(lport); | |
7cccc157 CL |
1179 | break; |
1180 | default: | |
1181 | /* should have already been caught by state checks */ | |
1182 | break; | |
1183 | } | |
c9c7bd7a CL |
1184 | else |
1185 | fc_lport_error(lport, fp); | |
c9c7bd7a CL |
1186 | out: |
1187 | fc_frame_free(fp); | |
1188 | err: | |
1189 | mutex_unlock(&lport->lp_mutex); | |
1190 | } | |
1191 | ||
d78c317f NP |
1192 | /** |
1193 | * fc_lport_ms_resp() - Handle response to a management server | |
1194 | * exchange | |
1195 | * @sp: current sequence in exchange | |
1196 | * @fp: response frame | |
1197 | * @lp_arg: Fibre Channel host port instance | |
1198 | * | |
1199 | * Locking Note: This function will be called without the lport lock | |
1200 | * held, but it will lock, call an _enter_* function or fc_lport_error() | |
1201 | * and then unlock the lport. | |
1202 | */ | |
1203 | static void fc_lport_ms_resp(struct fc_seq *sp, struct fc_frame *fp, | |
1204 | void *lp_arg) | |
1205 | { | |
1206 | struct fc_lport *lport = lp_arg; | |
1207 | struct fc_frame_header *fh; | |
1208 | struct fc_ct_hdr *ct; | |
1209 | ||
1210 | FC_LPORT_DBG(lport, "Received a ms %s\n", fc_els_resp_type(fp)); | |
1211 | ||
1212 | if (fp == ERR_PTR(-FC_EX_CLOSED)) | |
1213 | return; | |
1214 | ||
1215 | mutex_lock(&lport->lp_mutex); | |
1216 | ||
1217 | if (lport->state < LPORT_ST_RHBA || lport->state > LPORT_ST_DPRT) { | |
1218 | FC_LPORT_DBG(lport, "Received a management server response, " | |
1219 | "but in state %s\n", fc_lport_state(lport)); | |
1220 | if (IS_ERR(fp)) | |
1221 | goto err; | |
1222 | goto out; | |
1223 | } | |
1224 | ||
1225 | if (IS_ERR(fp)) { | |
1226 | fc_lport_error(lport, fp); | |
1227 | goto err; | |
1228 | } | |
1229 | ||
1230 | fh = fc_frame_header_get(fp); | |
1231 | ct = fc_frame_payload_get(fp, sizeof(*ct)); | |
1232 | ||
1233 | if (fh && ct && fh->fh_type == FC_TYPE_CT && | |
1234 | ct->ct_fs_type == FC_FST_MGMT && | |
1235 | ct->ct_fs_subtype == FC_FDMI_SUBTYPE) { | |
1236 | FC_LPORT_DBG(lport, "Received a management server response, " | |
1237 | "reason=%d explain=%d\n", | |
1238 | ct->ct_reason, | |
1239 | ct->ct_explan); | |
1240 | ||
1241 | switch (lport->state) { | |
1242 | case LPORT_ST_RHBA: | |
1243 | if (ntohs(ct->ct_cmd) == FC_FS_ACC) | |
1244 | fc_lport_enter_ms(lport, LPORT_ST_RPA); | |
1245 | else /* Error Skip RPA */ | |
1246 | fc_lport_enter_scr(lport); | |
1247 | break; | |
1248 | case LPORT_ST_RPA: | |
1249 | fc_lport_enter_scr(lport); | |
1250 | break; | |
1251 | case LPORT_ST_DPRT: | |
1252 | fc_lport_enter_ms(lport, LPORT_ST_RHBA); | |
1253 | break; | |
1254 | case LPORT_ST_DHBA: | |
1255 | fc_lport_enter_ms(lport, LPORT_ST_DPRT); | |
1256 | break; | |
1257 | default: | |
1258 | /* should have already been caught by state checks */ | |
1259 | break; | |
1260 | } | |
1261 | } else { | |
1262 | /* Invalid Frame? */ | |
1263 | fc_lport_error(lport, fp); | |
1264 | } | |
1265 | out: | |
1266 | fc_frame_free(fp); | |
1267 | err: | |
1268 | mutex_unlock(&lport->lp_mutex); | |
1269 | } | |
1270 | ||
42e9a92f | 1271 | /** |
34f42a07 | 1272 | * fc_lport_scr_resp() - Handle response to State Change Register (SCR) request |
3a3b42bf RL |
1273 | * @sp: current sequence in SCR exchange |
1274 | * @fp: response frame | |
42e9a92f RL |
1275 | * @lp_arg: Fibre Channel lport port instance that sent the registration request |
1276 | * | |
1277 | * Locking Note: This function will be called without the lport lock | |
1278 | * held, but it will lock, call an _enter_* function or fc_lport_error | |
1279 | * and then unlock the lport. | |
1280 | */ | |
1281 | static void fc_lport_scr_resp(struct fc_seq *sp, struct fc_frame *fp, | |
1282 | void *lp_arg) | |
1283 | { | |
1284 | struct fc_lport *lport = lp_arg; | |
1285 | u8 op; | |
1286 | ||
f657d299 JE |
1287 | FC_LPORT_DBG(lport, "Received a SCR %s\n", fc_els_resp_type(fp)); |
1288 | ||
42e9a92f RL |
1289 | if (fp == ERR_PTR(-FC_EX_CLOSED)) |
1290 | return; | |
1291 | ||
1292 | mutex_lock(&lport->lp_mutex); | |
1293 | ||
42e9a92f | 1294 | if (lport->state != LPORT_ST_SCR) { |
7414705e RL |
1295 | FC_LPORT_DBG(lport, "Received a SCR response, but in state " |
1296 | "%s\n", fc_lport_state(lport)); | |
76f6804e AJ |
1297 | if (IS_ERR(fp)) |
1298 | goto err; | |
42e9a92f RL |
1299 | goto out; |
1300 | } | |
1301 | ||
76f6804e AJ |
1302 | if (IS_ERR(fp)) { |
1303 | fc_lport_error(lport, fp); | |
1304 | goto err; | |
1305 | } | |
1306 | ||
42e9a92f RL |
1307 | op = fc_frame_payload_op(fp); |
1308 | if (op == ELS_LS_ACC) | |
1309 | fc_lport_enter_ready(lport); | |
1310 | else | |
1311 | fc_lport_error(lport, fp); | |
1312 | ||
1313 | out: | |
1314 | fc_frame_free(fp); | |
1315 | err: | |
1316 | mutex_unlock(&lport->lp_mutex); | |
1317 | } | |
1318 | ||
1319 | /** | |
3a3b42bf RL |
1320 | * fc_lport_enter_scr() - Send a SCR (State Change Register) request |
1321 | * @lport: The local port to register for state changes | |
42e9a92f RL |
1322 | * |
1323 | * Locking Note: The lport lock is expected to be held before calling | |
1324 | * this routine. | |
1325 | */ | |
1326 | static void fc_lport_enter_scr(struct fc_lport *lport) | |
1327 | { | |
1328 | struct fc_frame *fp; | |
1329 | ||
7414705e RL |
1330 | FC_LPORT_DBG(lport, "Entered SCR state from %s state\n", |
1331 | fc_lport_state(lport)); | |
42e9a92f RL |
1332 | |
1333 | fc_lport_state_enter(lport, LPORT_ST_SCR); | |
1334 | ||
1335 | fp = fc_frame_alloc(lport, sizeof(struct fc_els_scr)); | |
1336 | if (!fp) { | |
1337 | fc_lport_error(lport, fp); | |
1338 | return; | |
1339 | } | |
1340 | ||
a46f327a | 1341 | if (!lport->tt.elsct_send(lport, FC_FID_FCTRL, fp, ELS_SCR, |
b94f8951 JE |
1342 | fc_lport_scr_resp, lport, |
1343 | 2 * lport->r_a_tov)) | |
8f550f93 | 1344 | fc_lport_error(lport, NULL); |
42e9a92f RL |
1345 | } |
1346 | ||
1347 | /** | |
c914f7d1 | 1348 | * fc_lport_enter_ns() - register some object with the name server |
42e9a92f RL |
1349 | * @lport: Fibre Channel local port to register |
1350 | * | |
1351 | * Locking Note: The lport lock is expected to be held before calling | |
1352 | * this routine. | |
1353 | */ | |
c914f7d1 | 1354 | static void fc_lport_enter_ns(struct fc_lport *lport, enum fc_lport_state state) |
c9866a54 CL |
1355 | { |
1356 | struct fc_frame *fp; | |
c914f7d1 CL |
1357 | enum fc_ns_req cmd; |
1358 | int size = sizeof(struct fc_ct_hdr); | |
c9866a54 CL |
1359 | size_t len; |
1360 | ||
c914f7d1 CL |
1361 | FC_LPORT_DBG(lport, "Entered %s state from %s state\n", |
1362 | fc_lport_state_names[state], | |
c9866a54 CL |
1363 | fc_lport_state(lport)); |
1364 | ||
c914f7d1 | 1365 | fc_lport_state_enter(lport, state); |
c9866a54 | 1366 | |
c914f7d1 CL |
1367 | switch (state) { |
1368 | case LPORT_ST_RNN_ID: | |
1369 | cmd = FC_NS_RNN_ID; | |
1370 | size += sizeof(struct fc_ns_rn_id); | |
1371 | break; | |
1372 | case LPORT_ST_RSNN_NN: | |
1373 | len = strnlen(fc_host_symbolic_name(lport->host), 255); | |
1374 | /* if there is no symbolic name, skip to RFT_ID */ | |
1375 | if (!len) | |
1376 | return fc_lport_enter_ns(lport, LPORT_ST_RFT_ID); | |
1377 | cmd = FC_NS_RSNN_NN; | |
1378 | size += sizeof(struct fc_ns_rsnn) + len; | |
1379 | break; | |
1380 | case LPORT_ST_RSPN_ID: | |
1381 | len = strnlen(fc_host_symbolic_name(lport->host), 255); | |
1382 | /* if there is no symbolic name, skip to RFT_ID */ | |
1383 | if (!len) | |
1384 | return fc_lport_enter_ns(lport, LPORT_ST_RFT_ID); | |
1385 | cmd = FC_NS_RSPN_ID; | |
1386 | size += sizeof(struct fc_ns_rspn) + len; | |
1387 | break; | |
1388 | case LPORT_ST_RFT_ID: | |
1389 | cmd = FC_NS_RFT_ID; | |
1390 | size += sizeof(struct fc_ns_rft); | |
1391 | break; | |
ab593b18 JE |
1392 | case LPORT_ST_RFF_ID: |
1393 | cmd = FC_NS_RFF_ID; | |
1394 | size += sizeof(struct fc_ns_rff_id); | |
1395 | break; | |
c914f7d1 CL |
1396 | default: |
1397 | fc_lport_error(lport, NULL); | |
5baa17c3 CL |
1398 | return; |
1399 | } | |
1400 | ||
c914f7d1 | 1401 | fp = fc_frame_alloc(lport, size); |
c9c7bd7a CL |
1402 | if (!fp) { |
1403 | fc_lport_error(lport, fp); | |
1404 | return; | |
1405 | } | |
1406 | ||
c914f7d1 | 1407 | if (!lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, cmd, |
7cccc157 | 1408 | fc_lport_ns_resp, |
b94f8951 | 1409 | lport, 3 * lport->r_a_tov)) |
c9c7bd7a CL |
1410 | fc_lport_error(lport, fp); |
1411 | } | |
1412 | ||
42e9a92f RL |
1413 | static struct fc_rport_operations fc_lport_rport_ops = { |
1414 | .event_callback = fc_lport_rport_callback, | |
1415 | }; | |
1416 | ||
1417 | /** | |
3a3b42bf RL |
1418 | * fc_rport_enter_dns() - Create a fc_rport for the name server |
1419 | * @lport: The local port requesting a remote port for the name server | |
42e9a92f RL |
1420 | * |
1421 | * Locking Note: The lport lock is expected to be held before calling | |
1422 | * this routine. | |
1423 | */ | |
1424 | static void fc_lport_enter_dns(struct fc_lport *lport) | |
1425 | { | |
ab28f1fd | 1426 | struct fc_rport_priv *rdata; |
42e9a92f | 1427 | |
7414705e RL |
1428 | FC_LPORT_DBG(lport, "Entered DNS state from %s state\n", |
1429 | fc_lport_state(lport)); | |
42e9a92f RL |
1430 | |
1431 | fc_lport_state_enter(lport, LPORT_ST_DNS); | |
1432 | ||
48f00902 | 1433 | mutex_lock(&lport->disc.disc_mutex); |
2580064b | 1434 | rdata = fc_rport_create(lport, FC_FID_DIR_SERV); |
48f00902 | 1435 | mutex_unlock(&lport->disc.disc_mutex); |
9fb9d328 | 1436 | if (!rdata) |
42e9a92f RL |
1437 | goto err; |
1438 | ||
42e9a92f | 1439 | rdata->ops = &fc_lport_rport_ops; |
05d7d3b0 | 1440 | fc_rport_login(rdata); |
42e9a92f RL |
1441 | return; |
1442 | ||
1443 | err: | |
1444 | fc_lport_error(lport, NULL); | |
1445 | } | |
1446 | ||
d78c317f NP |
1447 | /** |
1448 | * fc_lport_enter_ms() - management server commands | |
1449 | * @lport: Fibre Channel local port to register | |
1450 | * | |
1451 | * Locking Note: The lport lock is expected to be held before calling | |
1452 | * this routine. | |
1453 | */ | |
1454 | static void fc_lport_enter_ms(struct fc_lport *lport, enum fc_lport_state state) | |
1455 | { | |
1456 | struct fc_frame *fp; | |
1457 | enum fc_fdmi_req cmd; | |
1458 | int size = sizeof(struct fc_ct_hdr); | |
1459 | size_t len; | |
1460 | int numattrs; | |
1461 | ||
1462 | FC_LPORT_DBG(lport, "Entered %s state from %s state\n", | |
1463 | fc_lport_state_names[state], | |
1464 | fc_lport_state(lport)); | |
1465 | ||
1466 | fc_lport_state_enter(lport, state); | |
1467 | ||
1468 | switch (state) { | |
1469 | case LPORT_ST_RHBA: | |
1470 | cmd = FC_FDMI_RHBA; | |
1471 | /* Number of HBA Attributes */ | |
1472 | numattrs = 10; | |
1473 | len = sizeof(struct fc_fdmi_rhba); | |
1474 | len -= sizeof(struct fc_fdmi_attr_entry); | |
1475 | len += (numattrs * FC_FDMI_ATTR_ENTRY_HEADER_LEN); | |
1476 | len += FC_FDMI_HBA_ATTR_NODENAME_LEN; | |
1477 | len += FC_FDMI_HBA_ATTR_MANUFACTURER_LEN; | |
1478 | len += FC_FDMI_HBA_ATTR_SERIALNUMBER_LEN; | |
1479 | len += FC_FDMI_HBA_ATTR_MODEL_LEN; | |
1480 | len += FC_FDMI_HBA_ATTR_MODELDESCR_LEN; | |
1481 | len += FC_FDMI_HBA_ATTR_HARDWAREVERSION_LEN; | |
1482 | len += FC_FDMI_HBA_ATTR_DRIVERVERSION_LEN; | |
1483 | len += FC_FDMI_HBA_ATTR_OPTIONROMVERSION_LEN; | |
1484 | len += FC_FDMI_HBA_ATTR_FIRMWAREVERSION_LEN; | |
1485 | len += FC_FDMI_HBA_ATTR_OSNAMEVERSION_LEN; | |
1486 | ||
1487 | size += len; | |
1488 | break; | |
1489 | case LPORT_ST_RPA: | |
1490 | cmd = FC_FDMI_RPA; | |
1491 | /* Number of Port Attributes */ | |
1492 | numattrs = 6; | |
1493 | len = sizeof(struct fc_fdmi_rpa); | |
1494 | len -= sizeof(struct fc_fdmi_attr_entry); | |
1495 | len += (numattrs * FC_FDMI_ATTR_ENTRY_HEADER_LEN); | |
1496 | len += FC_FDMI_PORT_ATTR_FC4TYPES_LEN; | |
1497 | len += FC_FDMI_PORT_ATTR_SUPPORTEDSPEED_LEN; | |
1498 | len += FC_FDMI_PORT_ATTR_CURRENTPORTSPEED_LEN; | |
1499 | len += FC_FDMI_PORT_ATTR_MAXFRAMESIZE_LEN; | |
1500 | len += FC_FDMI_PORT_ATTR_OSDEVICENAME_LEN; | |
1501 | len += FC_FDMI_PORT_ATTR_HOSTNAME_LEN; | |
1502 | ||
1503 | size += len; | |
1504 | break; | |
1505 | case LPORT_ST_DPRT: | |
1506 | cmd = FC_FDMI_DPRT; | |
1507 | len = sizeof(struct fc_fdmi_dprt); | |
1508 | size += len; | |
1509 | break; | |
1510 | case LPORT_ST_DHBA: | |
1511 | cmd = FC_FDMI_DHBA; | |
1512 | len = sizeof(struct fc_fdmi_dhba); | |
1513 | size += len; | |
1514 | break; | |
1515 | default: | |
1516 | fc_lport_error(lport, NULL); | |
1517 | return; | |
1518 | } | |
1519 | ||
1520 | FC_LPORT_DBG(lport, "Cmd=0x%x Len %d size %d\n", | |
1521 | cmd, (int)len, size); | |
1522 | fp = fc_frame_alloc(lport, size); | |
1523 | if (!fp) { | |
1524 | fc_lport_error(lport, fp); | |
1525 | return; | |
1526 | } | |
1527 | ||
1528 | if (!lport->tt.elsct_send(lport, FC_FID_MGMT_SERV, fp, cmd, | |
1529 | fc_lport_ms_resp, | |
1530 | lport, 3 * lport->r_a_tov)) | |
1531 | fc_lport_error(lport, fp); | |
1532 | } | |
1533 | ||
1534 | /** | |
1535 | * fc_rport_enter_fdmi() - Create a fc_rport for the management server | |
1536 | * @lport: The local port requesting a remote port for the management server | |
1537 | * | |
1538 | * Locking Note: The lport lock is expected to be held before calling | |
1539 | * this routine. | |
1540 | */ | |
1541 | static void fc_lport_enter_fdmi(struct fc_lport *lport) | |
1542 | { | |
1543 | struct fc_rport_priv *rdata; | |
1544 | ||
1545 | FC_LPORT_DBG(lport, "Entered FDMI state from %s state\n", | |
1546 | fc_lport_state(lport)); | |
1547 | ||
1548 | fc_lport_state_enter(lport, LPORT_ST_FDMI); | |
1549 | ||
1550 | mutex_lock(&lport->disc.disc_mutex); | |
2580064b | 1551 | rdata = fc_rport_create(lport, FC_FID_MGMT_SERV); |
d78c317f NP |
1552 | mutex_unlock(&lport->disc.disc_mutex); |
1553 | if (!rdata) | |
1554 | goto err; | |
1555 | ||
1556 | rdata->ops = &fc_lport_rport_ops; | |
05d7d3b0 | 1557 | fc_rport_login(rdata); |
d78c317f NP |
1558 | return; |
1559 | ||
1560 | err: | |
1561 | fc_lport_error(lport, NULL); | |
1562 | } | |
1563 | ||
42e9a92f | 1564 | /** |
3a3b42bf RL |
1565 | * fc_lport_timeout() - Handler for the retry_work timer |
1566 | * @work: The work struct of the local port | |
42e9a92f RL |
1567 | */ |
1568 | static void fc_lport_timeout(struct work_struct *work) | |
1569 | { | |
1570 | struct fc_lport *lport = | |
1571 | container_of(work, struct fc_lport, | |
1572 | retry_work.work); | |
1573 | ||
1574 | mutex_lock(&lport->lp_mutex); | |
1575 | ||
1576 | switch (lport->state) { | |
b1d9fd55 | 1577 | case LPORT_ST_DISABLED: |
22655ac2 | 1578 | break; |
42e9a92f | 1579 | case LPORT_ST_READY: |
42e9a92f | 1580 | break; |
22655ac2 JE |
1581 | case LPORT_ST_RESET: |
1582 | break; | |
42e9a92f RL |
1583 | case LPORT_ST_FLOGI: |
1584 | fc_lport_enter_flogi(lport); | |
1585 | break; | |
1586 | case LPORT_ST_DNS: | |
1587 | fc_lport_enter_dns(lport); | |
1588 | break; | |
c9c7bd7a | 1589 | case LPORT_ST_RNN_ID: |
5baa17c3 | 1590 | case LPORT_ST_RSNN_NN: |
c9866a54 | 1591 | case LPORT_ST_RSPN_ID: |
42e9a92f | 1592 | case LPORT_ST_RFT_ID: |
ab593b18 | 1593 | case LPORT_ST_RFF_ID: |
c914f7d1 | 1594 | fc_lport_enter_ns(lport, lport->state); |
42e9a92f | 1595 | break; |
d78c317f NP |
1596 | case LPORT_ST_FDMI: |
1597 | fc_lport_enter_fdmi(lport); | |
1598 | break; | |
1599 | case LPORT_ST_RHBA: | |
1600 | case LPORT_ST_RPA: | |
1601 | case LPORT_ST_DHBA: | |
1602 | case LPORT_ST_DPRT: | |
ac166d2f VD |
1603 | FC_LPORT_DBG(lport, "Skipping lport state %s to SCR\n", |
1604 | fc_lport_state(lport)); | |
1605 | /* fall thru */ | |
42e9a92f RL |
1606 | case LPORT_ST_SCR: |
1607 | fc_lport_enter_scr(lport); | |
1608 | break; | |
1609 | case LPORT_ST_LOGO: | |
1610 | fc_lport_enter_logo(lport); | |
1611 | break; | |
1612 | } | |
1613 | ||
1614 | mutex_unlock(&lport->lp_mutex); | |
1615 | } | |
1616 | ||
1617 | /** | |
34f42a07 | 1618 | * fc_lport_logo_resp() - Handle response to LOGO request |
3a3b42bf RL |
1619 | * @sp: The sequence that the LOGO was on |
1620 | * @fp: The LOGO frame | |
1621 | * @lp_arg: The lport port that received the LOGO request | |
42e9a92f RL |
1622 | * |
1623 | * Locking Note: This function will be called without the lport lock | |
3a3b42bf | 1624 | * held, but it will lock, call an _enter_* function or fc_lport_error() |
42e9a92f RL |
1625 | * and then unlock the lport. |
1626 | */ | |
11b56188 | 1627 | void fc_lport_logo_resp(struct fc_seq *sp, struct fc_frame *fp, |
3a3b42bf | 1628 | void *lp_arg) |
42e9a92f RL |
1629 | { |
1630 | struct fc_lport *lport = lp_arg; | |
1631 | u8 op; | |
1632 | ||
f657d299 JE |
1633 | FC_LPORT_DBG(lport, "Received a LOGO %s\n", fc_els_resp_type(fp)); |
1634 | ||
42e9a92f RL |
1635 | if (fp == ERR_PTR(-FC_EX_CLOSED)) |
1636 | return; | |
1637 | ||
1638 | mutex_lock(&lport->lp_mutex); | |
1639 | ||
42e9a92f | 1640 | if (lport->state != LPORT_ST_LOGO) { |
7414705e RL |
1641 | FC_LPORT_DBG(lport, "Received a LOGO response, but in state " |
1642 | "%s\n", fc_lport_state(lport)); | |
76f6804e AJ |
1643 | if (IS_ERR(fp)) |
1644 | goto err; | |
42e9a92f RL |
1645 | goto out; |
1646 | } | |
1647 | ||
76f6804e AJ |
1648 | if (IS_ERR(fp)) { |
1649 | fc_lport_error(lport, fp); | |
1650 | goto err; | |
1651 | } | |
1652 | ||
42e9a92f RL |
1653 | op = fc_frame_payload_op(fp); |
1654 | if (op == ELS_LS_ACC) | |
1190d925 | 1655 | fc_lport_enter_disabled(lport); |
42e9a92f RL |
1656 | else |
1657 | fc_lport_error(lport, fp); | |
1658 | ||
1659 | out: | |
1660 | fc_frame_free(fp); | |
1661 | err: | |
1662 | mutex_unlock(&lport->lp_mutex); | |
1663 | } | |
11b56188 | 1664 | EXPORT_SYMBOL(fc_lport_logo_resp); |
42e9a92f RL |
1665 | |
1666 | /** | |
34f42a07 | 1667 | * fc_rport_enter_logo() - Logout of the fabric |
3a3b42bf | 1668 | * @lport: The local port to be logged out |
42e9a92f RL |
1669 | * |
1670 | * Locking Note: The lport lock is expected to be held before calling | |
1671 | * this routine. | |
1672 | */ | |
1673 | static void fc_lport_enter_logo(struct fc_lport *lport) | |
1674 | { | |
1675 | struct fc_frame *fp; | |
1676 | struct fc_els_logo *logo; | |
1677 | ||
7414705e RL |
1678 | FC_LPORT_DBG(lport, "Entered LOGO state from %s state\n", |
1679 | fc_lport_state(lport)); | |
42e9a92f RL |
1680 | |
1681 | fc_lport_state_enter(lport, LPORT_ST_LOGO); | |
8faecddb | 1682 | fc_vports_linkchange(lport); |
42e9a92f | 1683 | |
42e9a92f RL |
1684 | fp = fc_frame_alloc(lport, sizeof(*logo)); |
1685 | if (!fp) { | |
1686 | fc_lport_error(lport, fp); | |
1687 | return; | |
1688 | } | |
1689 | ||
a46f327a | 1690 | if (!lport->tt.elsct_send(lport, FC_FID_FLOGI, fp, ELS_LOGO, |
b94f8951 JE |
1691 | fc_lport_logo_resp, lport, |
1692 | 2 * lport->r_a_tov)) | |
8f550f93 | 1693 | fc_lport_error(lport, NULL); |
42e9a92f RL |
1694 | } |
1695 | ||
1696 | /** | |
34f42a07 | 1697 | * fc_lport_flogi_resp() - Handle response to FLOGI request |
3a3b42bf RL |
1698 | * @sp: The sequence that the FLOGI was on |
1699 | * @fp: The FLOGI response frame | |
1700 | * @lp_arg: The lport port that received the FLOGI response | |
42e9a92f RL |
1701 | * |
1702 | * Locking Note: This function will be called without the lport lock | |
3a3b42bf | 1703 | * held, but it will lock, call an _enter_* function or fc_lport_error() |
42e9a92f RL |
1704 | * and then unlock the lport. |
1705 | */ | |
11b56188 | 1706 | void fc_lport_flogi_resp(struct fc_seq *sp, struct fc_frame *fp, |
3a3b42bf | 1707 | void *lp_arg) |
42e9a92f RL |
1708 | { |
1709 | struct fc_lport *lport = lp_arg; | |
907c07d4 | 1710 | struct fc_frame_header *fh; |
42e9a92f RL |
1711 | struct fc_els_flogi *flp; |
1712 | u32 did; | |
1713 | u16 csp_flags; | |
1714 | unsigned int r_a_tov; | |
1715 | unsigned int e_d_tov; | |
1716 | u16 mfs; | |
1717 | ||
f657d299 JE |
1718 | FC_LPORT_DBG(lport, "Received a FLOGI %s\n", fc_els_resp_type(fp)); |
1719 | ||
42e9a92f RL |
1720 | if (fp == ERR_PTR(-FC_EX_CLOSED)) |
1721 | return; | |
1722 | ||
1723 | mutex_lock(&lport->lp_mutex); | |
1724 | ||
42e9a92f | 1725 | if (lport->state != LPORT_ST_FLOGI) { |
7414705e RL |
1726 | FC_LPORT_DBG(lport, "Received a FLOGI response, but in state " |
1727 | "%s\n", fc_lport_state(lport)); | |
76f6804e AJ |
1728 | if (IS_ERR(fp)) |
1729 | goto err; | |
42e9a92f RL |
1730 | goto out; |
1731 | } | |
1732 | ||
76f6804e AJ |
1733 | if (IS_ERR(fp)) { |
1734 | fc_lport_error(lport, fp); | |
1735 | goto err; | |
1736 | } | |
1737 | ||
907c07d4 | 1738 | fh = fc_frame_header_get(fp); |
251748a9 | 1739 | did = fc_frame_did(fp); |
907c07d4 VD |
1740 | if (fh->fh_r_ctl != FC_RCTL_ELS_REP || did == 0 || |
1741 | fc_frame_payload_op(fp) != ELS_LS_ACC) { | |
1742 | FC_LPORT_DBG(lport, "FLOGI not accepted or bad response\n"); | |
7f985231 | 1743 | fc_lport_error(lport, fp); |
907c07d4 VD |
1744 | goto err; |
1745 | } | |
1746 | ||
1747 | flp = fc_frame_payload_get(fp, sizeof(*flp)); | |
1748 | if (!flp) { | |
1749 | FC_LPORT_DBG(lport, "FLOGI bad response\n"); | |
1750 | fc_lport_error(lport, fp); | |
1751 | goto err; | |
1752 | } | |
1753 | ||
1754 | mfs = ntohs(flp->fl_csp.sp_bb_data) & | |
1755 | FC_SP_BB_DATA_MASK; | |
93f90e51 VD |
1756 | |
1757 | if (mfs < FC_SP_MIN_MAX_PAYLOAD || mfs > FC_SP_MAX_MAX_PAYLOAD) { | |
73d67aa4 VD |
1758 | FC_LPORT_DBG(lport, "FLOGI bad mfs:%hu response, " |
1759 | "lport->mfs:%hu\n", mfs, lport->mfs); | |
1760 | fc_lport_error(lport, fp); | |
1761 | goto err; | |
1762 | } | |
1763 | ||
93f90e51 VD |
1764 | if (mfs <= lport->mfs) { |
1765 | lport->mfs = mfs; | |
1766 | fc_host_maxframe_size(lport->host) = mfs; | |
1767 | } | |
1768 | ||
907c07d4 VD |
1769 | csp_flags = ntohs(flp->fl_csp.sp_features); |
1770 | r_a_tov = ntohl(flp->fl_csp.sp_r_a_tov); | |
1771 | e_d_tov = ntohl(flp->fl_csp.sp_e_d_tov); | |
1772 | if (csp_flags & FC_SP_FT_EDTR) | |
1773 | e_d_tov /= 1000000; | |
1774 | ||
1775 | lport->npiv_enabled = !!(csp_flags & FC_SP_FT_NPIV_ACC); | |
1776 | ||
1777 | if ((csp_flags & FC_SP_FT_FPORT) == 0) { | |
1778 | if (e_d_tov > lport->e_d_tov) | |
1779 | lport->e_d_tov = e_d_tov; | |
76e72ad1 | 1780 | lport->r_a_tov = 2 * lport->e_d_tov; |
907c07d4 VD |
1781 | fc_lport_set_port_id(lport, did, fp); |
1782 | printk(KERN_INFO "host%d: libfc: " | |
1783 | "Port (%6.6x) entered " | |
1784 | "point-to-point mode\n", | |
1785 | lport->host->host_no, did); | |
1786 | fc_lport_ptp_setup(lport, fc_frame_sid(fp), | |
1787 | get_unaligned_be64( | |
1788 | &flp->fl_wwpn), | |
1789 | get_unaligned_be64( | |
1790 | &flp->fl_wwnn)); | |
1791 | } else { | |
76e72ad1 HR |
1792 | if (e_d_tov > lport->e_d_tov) |
1793 | lport->e_d_tov = e_d_tov; | |
1794 | if (r_a_tov > lport->r_a_tov) | |
1795 | lport->r_a_tov = r_a_tov; | |
907c07d4 VD |
1796 | fc_host_fabric_name(lport->host) = |
1797 | get_unaligned_be64(&flp->fl_wwnn); | |
1798 | fc_lport_set_port_id(lport, did, fp); | |
1799 | fc_lport_enter_dns(lport); | |
60a3c4df | 1800 | } |
42e9a92f RL |
1801 | |
1802 | out: | |
1803 | fc_frame_free(fp); | |
1804 | err: | |
1805 | mutex_unlock(&lport->lp_mutex); | |
1806 | } | |
11b56188 | 1807 | EXPORT_SYMBOL(fc_lport_flogi_resp); |
42e9a92f RL |
1808 | |
1809 | /** | |
34f42a07 | 1810 | * fc_rport_enter_flogi() - Send a FLOGI request to the fabric manager |
42e9a92f RL |
1811 | * @lport: Fibre Channel local port to be logged in to the fabric |
1812 | * | |
1813 | * Locking Note: The lport lock is expected to be held before calling | |
1814 | * this routine. | |
1815 | */ | |
c6b21c93 | 1816 | static void fc_lport_enter_flogi(struct fc_lport *lport) |
42e9a92f RL |
1817 | { |
1818 | struct fc_frame *fp; | |
1819 | ||
7414705e RL |
1820 | FC_LPORT_DBG(lport, "Entered FLOGI state from %s state\n", |
1821 | fc_lport_state(lport)); | |
42e9a92f RL |
1822 | |
1823 | fc_lport_state_enter(lport, LPORT_ST_FLOGI); | |
1824 | ||
3726f358 JE |
1825 | if (lport->point_to_multipoint) { |
1826 | if (lport->port_id) | |
1827 | fc_lport_enter_ready(lport); | |
1828 | return; | |
1829 | } | |
1830 | ||
42e9a92f RL |
1831 | fp = fc_frame_alloc(lport, sizeof(struct fc_els_flogi)); |
1832 | if (!fp) | |
1833 | return fc_lport_error(lport, fp); | |
1834 | ||
db36c06c CL |
1835 | if (!lport->tt.elsct_send(lport, FC_FID_FLOGI, fp, |
1836 | lport->vport ? ELS_FDISC : ELS_FLOGI, | |
b94f8951 JE |
1837 | fc_lport_flogi_resp, lport, |
1838 | lport->vport ? 2 * lport->r_a_tov : | |
1839 | lport->e_d_tov)) | |
8f550f93 | 1840 | fc_lport_error(lport, NULL); |
42e9a92f RL |
1841 | } |
1842 | ||
3a3b42bf RL |
1843 | /** |
1844 | * fc_lport_config() - Configure a fc_lport | |
1845 | * @lport: The local port to be configured | |
1846 | */ | |
42e9a92f RL |
1847 | int fc_lport_config(struct fc_lport *lport) |
1848 | { | |
1849 | INIT_DELAYED_WORK(&lport->retry_work, fc_lport_timeout); | |
1850 | mutex_init(&lport->lp_mutex); | |
1851 | ||
b1d9fd55 | 1852 | fc_lport_state_enter(lport, LPORT_ST_DISABLED); |
42e9a92f RL |
1853 | |
1854 | fc_lport_add_fc4_type(lport, FC_TYPE_FCP); | |
1855 | fc_lport_add_fc4_type(lport, FC_TYPE_CT); | |
acc1a921 | 1856 | fc_fc4_conf_lport_params(lport, FC_TYPE_FCP); |
42e9a92f RL |
1857 | |
1858 | return 0; | |
1859 | } | |
1860 | EXPORT_SYMBOL(fc_lport_config); | |
1861 | ||
3a3b42bf RL |
1862 | /** |
1863 | * fc_lport_init() - Initialize the lport layer for a local port | |
1864 | * @lport: The local port to initialize the exchange layer for | |
1865 | */ | |
42e9a92f RL |
1866 | int fc_lport_init(struct fc_lport *lport) |
1867 | { | |
42e9a92f RL |
1868 | fc_host_port_type(lport->host) = FC_PORTTYPE_NPORT; |
1869 | fc_host_node_name(lport->host) = lport->wwnn; | |
1870 | fc_host_port_name(lport->host) = lport->wwpn; | |
1871 | fc_host_supported_classes(lport->host) = FC_COS_CLASS3; | |
1872 | memset(fc_host_supported_fc4s(lport->host), 0, | |
1873 | sizeof(fc_host_supported_fc4s(lport->host))); | |
1874 | fc_host_supported_fc4s(lport->host)[2] = 1; | |
1875 | fc_host_supported_fc4s(lport->host)[7] = 1; | |
1876 | ||
1877 | /* This value is also unchanging */ | |
1878 | memset(fc_host_active_fc4s(lport->host), 0, | |
1879 | sizeof(fc_host_active_fc4s(lport->host))); | |
1880 | fc_host_active_fc4s(lport->host)[2] = 1; | |
1881 | fc_host_active_fc4s(lport->host)[7] = 1; | |
1882 | fc_host_maxframe_size(lport->host) = lport->mfs; | |
1883 | fc_host_supported_speeds(lport->host) = 0; | |
1884 | if (lport->link_supported_speeds & FC_PORTSPEED_1GBIT) | |
1885 | fc_host_supported_speeds(lport->host) |= FC_PORTSPEED_1GBIT; | |
1886 | if (lport->link_supported_speeds & FC_PORTSPEED_10GBIT) | |
1887 | fc_host_supported_speeds(lport->host) |= FC_PORTSPEED_10GBIT; | |
70d53b04 | 1888 | fc_fc4_add_lport(lport); |
42e9a92f RL |
1889 | |
1890 | return 0; | |
1891 | } | |
1892 | EXPORT_SYMBOL(fc_lport_init); | |
a51ab396 SM |
1893 | |
1894 | /** | |
3a3b42bf RL |
1895 | * fc_lport_bsg_resp() - The common response handler for FC Passthrough requests |
1896 | * @sp: The sequence for the FC Passthrough response | |
1897 | * @fp: The response frame | |
1898 | * @info_arg: The BSG info that the response is for | |
a51ab396 SM |
1899 | */ |
1900 | static void fc_lport_bsg_resp(struct fc_seq *sp, struct fc_frame *fp, | |
1901 | void *info_arg) | |
1902 | { | |
1903 | struct fc_bsg_info *info = info_arg; | |
75cc8cfc | 1904 | struct bsg_job *job = info->job; |
01e0e15c | 1905 | struct fc_bsg_reply *bsg_reply = job->reply; |
a51ab396 SM |
1906 | struct fc_lport *lport = info->lport; |
1907 | struct fc_frame_header *fh; | |
1908 | size_t len; | |
1909 | void *buf; | |
1910 | ||
1911 | if (IS_ERR(fp)) { | |
01e0e15c | 1912 | bsg_reply->result = (PTR_ERR(fp) == -FC_EX_CLOSED) ? |
a51ab396 SM |
1913 | -ECONNABORTED : -ETIMEDOUT; |
1914 | job->reply_len = sizeof(uint32_t); | |
06548160 | 1915 | bsg_job_done(job, bsg_reply->result, |
1abaede7 | 1916 | bsg_reply->reply_payload_rcv_len); |
a51ab396 SM |
1917 | kfree(info); |
1918 | return; | |
1919 | } | |
1920 | ||
1921 | mutex_lock(&lport->lp_mutex); | |
1922 | fh = fc_frame_header_get(fp); | |
1923 | len = fr_len(fp) - sizeof(*fh); | |
1924 | buf = fc_frame_payload_get(fp, 0); | |
1925 | ||
1926 | if (fr_sof(fp) == FC_SOF_I3 && !ntohs(fh->fh_seq_cnt)) { | |
1927 | /* Get the response code from the first frame payload */ | |
1928 | unsigned short cmd = (info->rsp_code == FC_FS_ACC) ? | |
1929 | ntohs(((struct fc_ct_hdr *)buf)->ct_cmd) : | |
1930 | (unsigned short)fc_frame_payload_op(fp); | |
1931 | ||
1932 | /* Save the reply status of the job */ | |
01e0e15c | 1933 | bsg_reply->reply_data.ctels_reply.status = |
a51ab396 SM |
1934 | (cmd == info->rsp_code) ? |
1935 | FC_CTELS_STATUS_OK : FC_CTELS_STATUS_REJECT; | |
1936 | } | |
1937 | ||
01e0e15c | 1938 | bsg_reply->reply_payload_rcv_len += |
a51ab396 | 1939 | fc_copy_buffer_to_sglist(buf, len, info->sg, &info->nents, |
77dfce07 | 1940 | &info->offset, NULL); |
a51ab396 SM |
1941 | |
1942 | if (fr_eof(fp) == FC_EOF_T && | |
1943 | (ntoh24(fh->fh_f_ctl) & (FC_FC_LAST_SEQ | FC_FC_END_SEQ)) == | |
1944 | (FC_FC_LAST_SEQ | FC_FC_END_SEQ)) { | |
01e0e15c | 1945 | if (bsg_reply->reply_payload_rcv_len > |
a51ab396 | 1946 | job->reply_payload.payload_len) |
01e0e15c | 1947 | bsg_reply->reply_payload_rcv_len = |
a51ab396 | 1948 | job->reply_payload.payload_len; |
01e0e15c | 1949 | bsg_reply->result = 0; |
06548160 | 1950 | bsg_job_done(job, bsg_reply->result, |
1abaede7 | 1951 | bsg_reply->reply_payload_rcv_len); |
a51ab396 SM |
1952 | kfree(info); |
1953 | } | |
1954 | fc_frame_free(fp); | |
1955 | mutex_unlock(&lport->lp_mutex); | |
1956 | } | |
1957 | ||
1958 | /** | |
3a3b42bf RL |
1959 | * fc_lport_els_request() - Send ELS passthrough request |
1960 | * @job: The BSG Passthrough job | |
a51ab396 | 1961 | * @lport: The local port sending the request |
3a3b42bf | 1962 | * @did: The destination port id |
a51ab396 SM |
1963 | * |
1964 | * Locking Note: The lport lock is expected to be held before calling | |
1965 | * this routine. | |
1966 | */ | |
75cc8cfc | 1967 | static int fc_lport_els_request(struct bsg_job *job, |
a51ab396 SM |
1968 | struct fc_lport *lport, |
1969 | u32 did, u32 tov) | |
1970 | { | |
1971 | struct fc_bsg_info *info; | |
1972 | struct fc_frame *fp; | |
1973 | struct fc_frame_header *fh; | |
1974 | char *pp; | |
1975 | int len; | |
1976 | ||
70d919fb | 1977 | fp = fc_frame_alloc(lport, job->request_payload.payload_len); |
a51ab396 SM |
1978 | if (!fp) |
1979 | return -ENOMEM; | |
1980 | ||
1981 | len = job->request_payload.payload_len; | |
1982 | pp = fc_frame_payload_get(fp, len); | |
1983 | ||
1984 | sg_copy_to_buffer(job->request_payload.sg_list, | |
1985 | job->request_payload.sg_cnt, | |
1986 | pp, len); | |
1987 | ||
1988 | fh = fc_frame_header_get(fp); | |
1989 | fh->fh_r_ctl = FC_RCTL_ELS_REQ; | |
1990 | hton24(fh->fh_d_id, did); | |
7b2787ec | 1991 | hton24(fh->fh_s_id, lport->port_id); |
a51ab396 | 1992 | fh->fh_type = FC_TYPE_ELS; |
24f089e2 | 1993 | hton24(fh->fh_f_ctl, FC_FCTL_REQ); |
a51ab396 SM |
1994 | fh->fh_cs_ctl = 0; |
1995 | fh->fh_df_ctl = 0; | |
1996 | fh->fh_parm_offset = 0; | |
1997 | ||
1998 | info = kzalloc(sizeof(struct fc_bsg_info), GFP_KERNEL); | |
1999 | if (!info) { | |
2000 | fc_frame_free(fp); | |
2001 | return -ENOMEM; | |
2002 | } | |
2003 | ||
2004 | info->job = job; | |
2005 | info->lport = lport; | |
2006 | info->rsp_code = ELS_LS_ACC; | |
2007 | info->nents = job->reply_payload.sg_cnt; | |
2008 | info->sg = job->reply_payload.sg_list; | |
2009 | ||
3afd2d15 HR |
2010 | if (!fc_exch_seq_send(lport, fp, fc_lport_bsg_resp, |
2011 | NULL, info, tov)) { | |
72e0daad | 2012 | kfree(info); |
a51ab396 | 2013 | return -ECOMM; |
72e0daad | 2014 | } |
a51ab396 SM |
2015 | return 0; |
2016 | } | |
2017 | ||
2018 | /** | |
3a3b42bf RL |
2019 | * fc_lport_ct_request() - Send CT Passthrough request |
2020 | * @job: The BSG Passthrough job | |
a51ab396 SM |
2021 | * @lport: The local port sending the request |
2022 | * @did: The destination FC-ID | |
3a3b42bf | 2023 | * @tov: The timeout period to wait for the response |
a51ab396 SM |
2024 | * |
2025 | * Locking Note: The lport lock is expected to be held before calling | |
2026 | * this routine. | |
2027 | */ | |
75cc8cfc | 2028 | static int fc_lport_ct_request(struct bsg_job *job, |
a51ab396 SM |
2029 | struct fc_lport *lport, u32 did, u32 tov) |
2030 | { | |
2031 | struct fc_bsg_info *info; | |
2032 | struct fc_frame *fp; | |
2033 | struct fc_frame_header *fh; | |
2034 | struct fc_ct_req *ct; | |
2035 | size_t len; | |
2036 | ||
2037 | fp = fc_frame_alloc(lport, sizeof(struct fc_ct_hdr) + | |
2038 | job->request_payload.payload_len); | |
2039 | if (!fp) | |
2040 | return -ENOMEM; | |
2041 | ||
2042 | len = job->request_payload.payload_len; | |
2043 | ct = fc_frame_payload_get(fp, len); | |
2044 | ||
2045 | sg_copy_to_buffer(job->request_payload.sg_list, | |
2046 | job->request_payload.sg_cnt, | |
2047 | ct, len); | |
2048 | ||
2049 | fh = fc_frame_header_get(fp); | |
2050 | fh->fh_r_ctl = FC_RCTL_DD_UNSOL_CTL; | |
2051 | hton24(fh->fh_d_id, did); | |
7b2787ec | 2052 | hton24(fh->fh_s_id, lport->port_id); |
a51ab396 | 2053 | fh->fh_type = FC_TYPE_CT; |
24f089e2 | 2054 | hton24(fh->fh_f_ctl, FC_FCTL_REQ); |
a51ab396 SM |
2055 | fh->fh_cs_ctl = 0; |
2056 | fh->fh_df_ctl = 0; | |
2057 | fh->fh_parm_offset = 0; | |
2058 | ||
2059 | info = kzalloc(sizeof(struct fc_bsg_info), GFP_KERNEL); | |
2060 | if (!info) { | |
2061 | fc_frame_free(fp); | |
2062 | return -ENOMEM; | |
2063 | } | |
2064 | ||
2065 | info->job = job; | |
2066 | info->lport = lport; | |
2067 | info->rsp_code = FC_FS_ACC; | |
2068 | info->nents = job->reply_payload.sg_cnt; | |
2069 | info->sg = job->reply_payload.sg_list; | |
2070 | ||
3afd2d15 HR |
2071 | if (!fc_exch_seq_send(lport, fp, fc_lport_bsg_resp, |
2072 | NULL, info, tov)) { | |
2d6dfb00 | 2073 | kfree(info); |
a51ab396 | 2074 | return -ECOMM; |
2d6dfb00 | 2075 | } |
a51ab396 SM |
2076 | return 0; |
2077 | } | |
2078 | ||
2079 | /** | |
2080 | * fc_lport_bsg_request() - The common entry point for sending | |
3a3b42bf RL |
2081 | * FC Passthrough requests |
2082 | * @job: The BSG passthrough job | |
a51ab396 | 2083 | */ |
75cc8cfc | 2084 | int fc_lport_bsg_request(struct bsg_job *job) |
a51ab396 | 2085 | { |
01e0e15c JT |
2086 | struct fc_bsg_request *bsg_request = job->request; |
2087 | struct fc_bsg_reply *bsg_reply = job->reply; | |
a51ab396 | 2088 | struct request *rsp = job->req->next_rq; |
cd21c605 | 2089 | struct Scsi_Host *shost = fc_bsg_to_shost(job); |
a51ab396 SM |
2090 | struct fc_lport *lport = shost_priv(shost); |
2091 | struct fc_rport *rport; | |
2092 | struct fc_rport_priv *rdata; | |
2093 | int rc = -EINVAL; | |
baa6719f | 2094 | u32 did, tov; |
a51ab396 | 2095 | |
01e0e15c | 2096 | bsg_reply->reply_payload_rcv_len = 0; |
b248df30 HD |
2097 | if (rsp) |
2098 | rsp->resid_len = job->reply_payload.payload_len; | |
a51ab396 SM |
2099 | |
2100 | mutex_lock(&lport->lp_mutex); | |
2101 | ||
01e0e15c | 2102 | switch (bsg_request->msgcode) { |
a51ab396 | 2103 | case FC_BSG_RPT_ELS: |
1d69b122 | 2104 | rport = fc_bsg_to_rport(job); |
a51ab396 SM |
2105 | if (!rport) |
2106 | break; | |
2107 | ||
2108 | rdata = rport->dd_data; | |
2109 | rc = fc_lport_els_request(job, lport, rport->port_id, | |
2110 | rdata->e_d_tov); | |
2111 | break; | |
2112 | ||
2113 | case FC_BSG_RPT_CT: | |
1d69b122 | 2114 | rport = fc_bsg_to_rport(job); |
a51ab396 SM |
2115 | if (!rport) |
2116 | break; | |
2117 | ||
2118 | rdata = rport->dd_data; | |
2119 | rc = fc_lport_ct_request(job, lport, rport->port_id, | |
2120 | rdata->e_d_tov); | |
2121 | break; | |
2122 | ||
2123 | case FC_BSG_HST_CT: | |
01e0e15c | 2124 | did = ntoh24(bsg_request->rqst_data.h_ct.port_id); |
baa6719f | 2125 | if (did == FC_FID_DIR_SERV) { |
3a3b42bf | 2126 | rdata = lport->dns_rdata; |
baa6719f HR |
2127 | if (!rdata) |
2128 | break; | |
2129 | tov = rdata->e_d_tov; | |
2130 | } else { | |
e87b7777 | 2131 | rdata = fc_rport_lookup(lport, did); |
baa6719f HR |
2132 | if (!rdata) |
2133 | break; | |
2134 | tov = rdata->e_d_tov; | |
944ef968 | 2135 | kref_put(&rdata->kref, fc_rport_destroy); |
baa6719f | 2136 | } |
a51ab396 | 2137 | |
baa6719f | 2138 | rc = fc_lport_ct_request(job, lport, did, tov); |
a51ab396 SM |
2139 | break; |
2140 | ||
2141 | case FC_BSG_HST_ELS_NOLOGIN: | |
01e0e15c | 2142 | did = ntoh24(bsg_request->rqst_data.h_els.port_id); |
a51ab396 SM |
2143 | rc = fc_lport_els_request(job, lport, did, lport->e_d_tov); |
2144 | break; | |
2145 | } | |
2146 | ||
2147 | mutex_unlock(&lport->lp_mutex); | |
2148 | return rc; | |
2149 | } | |
2150 | EXPORT_SYMBOL(fc_lport_bsg_request); |