Commit | Line | Data |
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9ef3e4a4 | 1 | /* |
1da177e4 LT |
2 | * FiberChannel transport specific attributes exported to sysfs. |
3 | * | |
4 | * Copyright (c) 2003 Silicon Graphics, Inc. All rights reserved. | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
19 | * | |
20 | * ======== | |
21 | * | |
a53eb5e0 | 22 | * Copyright (C) 2004-2007 James Smart, Emulex Corporation |
1da177e4 LT |
23 | * Rewrite for host, target, device, and remote port attributes, |
24 | * statistics, and service functions... | |
9ef3e4a4 | 25 | * Add vports, etc |
1da177e4 LT |
26 | * |
27 | */ | |
28 | #include <linux/module.h> | |
29 | #include <linux/init.h> | |
65d430fa | 30 | #include <linux/delay.h> |
1da177e4 LT |
31 | #include <scsi/scsi_device.h> |
32 | #include <scsi/scsi_host.h> | |
33 | #include <scsi/scsi_transport.h> | |
34 | #include <scsi/scsi_transport_fc.h> | |
c829c394 | 35 | #include <scsi/scsi_cmnd.h> |
84314fd4 JS |
36 | #include <linux/netlink.h> |
37 | #include <net/netlink.h> | |
38 | #include <scsi/scsi_netlink_fc.h> | |
9e4f5e29 | 39 | #include <scsi/scsi_bsg_fc.h> |
1da177e4 | 40 | #include "scsi_priv.h" |
7525236d | 41 | #include "scsi_transport_fc_internal.h" |
1da177e4 | 42 | |
aedf3497 | 43 | static int fc_queue_work(struct Scsi_Host *, struct work_struct *); |
9ef3e4a4 | 44 | static void fc_vport_sched_delete(struct work_struct *work); |
a30c3f69 | 45 | static int fc_vport_setup(struct Scsi_Host *shost, int channel, |
a53eb5e0 JS |
46 | struct device *pdev, struct fc_vport_identifiers *ids, |
47 | struct fc_vport **vport); | |
9e4f5e29 JS |
48 | static int fc_bsg_hostadd(struct Scsi_Host *, struct fc_host_attrs *); |
49 | static int fc_bsg_rportadd(struct Scsi_Host *, struct fc_rport *); | |
50 | static void fc_bsg_remove(struct request_queue *); | |
51 | static void fc_bsg_goose_queue(struct fc_rport *); | |
a53eb5e0 | 52 | |
1da177e4 LT |
53 | /* |
54 | * Redefine so that we can have same named attributes in the | |
55 | * sdev/starget/host objects. | |
56 | */ | |
ee959b00 TJ |
57 | #define FC_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \ |
58 | struct device_attribute device_attr_##_prefix##_##_name = \ | |
1da177e4 LT |
59 | __ATTR(_name,_mode,_show,_store) |
60 | ||
61 | #define fc_enum_name_search(title, table_type, table) \ | |
62 | static const char *get_fc_##title##_name(enum table_type table_key) \ | |
63 | { \ | |
64 | int i; \ | |
65 | char *name = NULL; \ | |
66 | \ | |
6391a113 | 67 | for (i = 0; i < ARRAY_SIZE(table); i++) { \ |
1da177e4 LT |
68 | if (table[i].value == table_key) { \ |
69 | name = table[i].name; \ | |
70 | break; \ | |
71 | } \ | |
72 | } \ | |
73 | return name; \ | |
74 | } | |
75 | ||
76 | #define fc_enum_name_match(title, table_type, table) \ | |
77 | static int get_fc_##title##_match(const char *table_key, \ | |
78 | enum table_type *value) \ | |
79 | { \ | |
80 | int i; \ | |
81 | \ | |
6391a113 | 82 | for (i = 0; i < ARRAY_SIZE(table); i++) { \ |
1da177e4 LT |
83 | if (strncmp(table_key, table[i].name, \ |
84 | table[i].matchlen) == 0) { \ | |
85 | *value = table[i].value; \ | |
86 | return 0; /* success */ \ | |
87 | } \ | |
88 | } \ | |
89 | return 1; /* failure */ \ | |
90 | } | |
91 | ||
92 | ||
93 | /* Convert fc_port_type values to ascii string name */ | |
94 | static struct { | |
95 | enum fc_port_type value; | |
96 | char *name; | |
97 | } fc_port_type_names[] = { | |
98 | { FC_PORTTYPE_UNKNOWN, "Unknown" }, | |
99 | { FC_PORTTYPE_OTHER, "Other" }, | |
100 | { FC_PORTTYPE_NOTPRESENT, "Not Present" }, | |
101 | { FC_PORTTYPE_NPORT, "NPort (fabric via point-to-point)" }, | |
102 | { FC_PORTTYPE_NLPORT, "NLPort (fabric via loop)" }, | |
103 | { FC_PORTTYPE_LPORT, "LPort (private loop)" }, | |
951948a3 | 104 | { FC_PORTTYPE_PTP, "Point-To-Point (direct nport connection)" }, |
a53eb5e0 | 105 | { FC_PORTTYPE_NPIV, "NPIV VPORT" }, |
1da177e4 LT |
106 | }; |
107 | fc_enum_name_search(port_type, fc_port_type, fc_port_type_names) | |
108 | #define FC_PORTTYPE_MAX_NAMELEN 50 | |
109 | ||
a53eb5e0 JS |
110 | /* Reuse fc_port_type enum function for vport_type */ |
111 | #define get_fc_vport_type_name get_fc_port_type_name | |
112 | ||
1da177e4 | 113 | |
84314fd4 JS |
114 | /* Convert fc_host_event_code values to ascii string name */ |
115 | static const struct { | |
116 | enum fc_host_event_code value; | |
117 | char *name; | |
118 | } fc_host_event_code_names[] = { | |
119 | { FCH_EVT_LIP, "lip" }, | |
120 | { FCH_EVT_LINKUP, "link_up" }, | |
121 | { FCH_EVT_LINKDOWN, "link_down" }, | |
122 | { FCH_EVT_LIPRESET, "lip_reset" }, | |
123 | { FCH_EVT_RSCN, "rscn" }, | |
124 | { FCH_EVT_ADAPTER_CHANGE, "adapter_chg" }, | |
125 | { FCH_EVT_PORT_UNKNOWN, "port_unknown" }, | |
126 | { FCH_EVT_PORT_ONLINE, "port_online" }, | |
127 | { FCH_EVT_PORT_OFFLINE, "port_offline" }, | |
128 | { FCH_EVT_PORT_FABRIC, "port_fabric" }, | |
129 | { FCH_EVT_LINK_UNKNOWN, "link_unknown" }, | |
130 | { FCH_EVT_VENDOR_UNIQUE, "vendor_unique" }, | |
131 | }; | |
132 | fc_enum_name_search(host_event_code, fc_host_event_code, | |
133 | fc_host_event_code_names) | |
134 | #define FC_HOST_EVENT_CODE_MAX_NAMELEN 30 | |
135 | ||
136 | ||
1da177e4 LT |
137 | /* Convert fc_port_state values to ascii string name */ |
138 | static struct { | |
139 | enum fc_port_state value; | |
140 | char *name; | |
141 | } fc_port_state_names[] = { | |
142 | { FC_PORTSTATE_UNKNOWN, "Unknown" }, | |
143 | { FC_PORTSTATE_NOTPRESENT, "Not Present" }, | |
144 | { FC_PORTSTATE_ONLINE, "Online" }, | |
145 | { FC_PORTSTATE_OFFLINE, "Offline" }, | |
146 | { FC_PORTSTATE_BLOCKED, "Blocked" }, | |
147 | { FC_PORTSTATE_BYPASSED, "Bypassed" }, | |
148 | { FC_PORTSTATE_DIAGNOSTICS, "Diagnostics" }, | |
149 | { FC_PORTSTATE_LINKDOWN, "Linkdown" }, | |
150 | { FC_PORTSTATE_ERROR, "Error" }, | |
151 | { FC_PORTSTATE_LOOPBACK, "Loopback" }, | |
42e33148 | 152 | { FC_PORTSTATE_DELETED, "Deleted" }, |
1da177e4 LT |
153 | }; |
154 | fc_enum_name_search(port_state, fc_port_state, fc_port_state_names) | |
155 | #define FC_PORTSTATE_MAX_NAMELEN 20 | |
156 | ||
157 | ||
a53eb5e0 JS |
158 | /* Convert fc_vport_state values to ascii string name */ |
159 | static struct { | |
160 | enum fc_vport_state value; | |
161 | char *name; | |
162 | } fc_vport_state_names[] = { | |
163 | { FC_VPORT_UNKNOWN, "Unknown" }, | |
164 | { FC_VPORT_ACTIVE, "Active" }, | |
165 | { FC_VPORT_DISABLED, "Disabled" }, | |
166 | { FC_VPORT_LINKDOWN, "Linkdown" }, | |
167 | { FC_VPORT_INITIALIZING, "Initializing" }, | |
168 | { FC_VPORT_NO_FABRIC_SUPP, "No Fabric Support" }, | |
169 | { FC_VPORT_NO_FABRIC_RSCS, "No Fabric Resources" }, | |
170 | { FC_VPORT_FABRIC_LOGOUT, "Fabric Logout" }, | |
171 | { FC_VPORT_FABRIC_REJ_WWN, "Fabric Rejected WWN" }, | |
172 | { FC_VPORT_FAILED, "VPort Failed" }, | |
173 | }; | |
174 | fc_enum_name_search(vport_state, fc_vport_state, fc_vport_state_names) | |
175 | #define FC_VPORTSTATE_MAX_NAMELEN 24 | |
176 | ||
177 | /* Reuse fc_vport_state enum function for vport_last_state */ | |
178 | #define get_fc_vport_last_state_name get_fc_vport_state_name | |
179 | ||
180 | ||
1da177e4 | 181 | /* Convert fc_tgtid_binding_type values to ascii string name */ |
0ad78200 | 182 | static const struct { |
1da177e4 LT |
183 | enum fc_tgtid_binding_type value; |
184 | char *name; | |
185 | int matchlen; | |
186 | } fc_tgtid_binding_type_names[] = { | |
187 | { FC_TGTID_BIND_NONE, "none", 4 }, | |
188 | { FC_TGTID_BIND_BY_WWPN, "wwpn (World Wide Port Name)", 4 }, | |
189 | { FC_TGTID_BIND_BY_WWNN, "wwnn (World Wide Node Name)", 4 }, | |
190 | { FC_TGTID_BIND_BY_ID, "port_id (FC Address)", 7 }, | |
191 | }; | |
192 | fc_enum_name_search(tgtid_bind_type, fc_tgtid_binding_type, | |
193 | fc_tgtid_binding_type_names) | |
194 | fc_enum_name_match(tgtid_bind_type, fc_tgtid_binding_type, | |
195 | fc_tgtid_binding_type_names) | |
196 | #define FC_BINDTYPE_MAX_NAMELEN 30 | |
197 | ||
198 | ||
199 | #define fc_bitfield_name_search(title, table) \ | |
200 | static ssize_t \ | |
201 | get_fc_##title##_names(u32 table_key, char *buf) \ | |
202 | { \ | |
203 | char *prefix = ""; \ | |
204 | ssize_t len = 0; \ | |
205 | int i; \ | |
206 | \ | |
6391a113 | 207 | for (i = 0; i < ARRAY_SIZE(table); i++) { \ |
1da177e4 LT |
208 | if (table[i].value & table_key) { \ |
209 | len += sprintf(buf + len, "%s%s", \ | |
210 | prefix, table[i].name); \ | |
211 | prefix = ", "; \ | |
212 | } \ | |
213 | } \ | |
214 | len += sprintf(buf + len, "\n"); \ | |
215 | return len; \ | |
216 | } | |
217 | ||
218 | ||
219 | /* Convert FC_COS bit values to ascii string name */ | |
0ad78200 | 220 | static const struct { |
1da177e4 LT |
221 | u32 value; |
222 | char *name; | |
223 | } fc_cos_names[] = { | |
224 | { FC_COS_CLASS1, "Class 1" }, | |
225 | { FC_COS_CLASS2, "Class 2" }, | |
226 | { FC_COS_CLASS3, "Class 3" }, | |
227 | { FC_COS_CLASS4, "Class 4" }, | |
228 | { FC_COS_CLASS6, "Class 6" }, | |
229 | }; | |
230 | fc_bitfield_name_search(cos, fc_cos_names) | |
231 | ||
232 | ||
233 | /* Convert FC_PORTSPEED bit values to ascii string name */ | |
0ad78200 | 234 | static const struct { |
1da177e4 LT |
235 | u32 value; |
236 | char *name; | |
237 | } fc_port_speed_names[] = { | |
238 | { FC_PORTSPEED_1GBIT, "1 Gbit" }, | |
239 | { FC_PORTSPEED_2GBIT, "2 Gbit" }, | |
240 | { FC_PORTSPEED_4GBIT, "4 Gbit" }, | |
241 | { FC_PORTSPEED_10GBIT, "10 Gbit" }, | |
c3d2350a JS |
242 | { FC_PORTSPEED_8GBIT, "8 Gbit" }, |
243 | { FC_PORTSPEED_16GBIT, "16 Gbit" }, | |
1da177e4 LT |
244 | { FC_PORTSPEED_NOT_NEGOTIATED, "Not Negotiated" }, |
245 | }; | |
246 | fc_bitfield_name_search(port_speed, fc_port_speed_names) | |
247 | ||
248 | ||
249 | static int | |
250 | show_fc_fc4s (char *buf, u8 *fc4_list) | |
251 | { | |
252 | int i, len=0; | |
253 | ||
254 | for (i = 0; i < FC_FC4_LIST_SIZE; i++, fc4_list++) | |
255 | len += sprintf(buf + len , "0x%02x ", *fc4_list); | |
256 | len += sprintf(buf + len, "\n"); | |
257 | return len; | |
258 | } | |
259 | ||
260 | ||
a53eb5e0 | 261 | /* Convert FC_PORT_ROLE bit values to ascii string name */ |
0ad78200 | 262 | static const struct { |
1da177e4 LT |
263 | u32 value; |
264 | char *name; | |
a53eb5e0 JS |
265 | } fc_port_role_names[] = { |
266 | { FC_PORT_ROLE_FCP_TARGET, "FCP Target" }, | |
267 | { FC_PORT_ROLE_FCP_INITIATOR, "FCP Initiator" }, | |
268 | { FC_PORT_ROLE_IP_PORT, "IP Port" }, | |
1da177e4 | 269 | }; |
a53eb5e0 | 270 | fc_bitfield_name_search(port_roles, fc_port_role_names) |
1da177e4 LT |
271 | |
272 | /* | |
273 | * Define roles that are specific to port_id. Values are relative to ROLE_MASK. | |
274 | */ | |
275 | #define FC_WELLKNOWN_PORTID_MASK 0xfffff0 | |
276 | #define FC_WELLKNOWN_ROLE_MASK 0x00000f | |
277 | #define FC_FPORT_PORTID 0x00000e | |
278 | #define FC_FABCTLR_PORTID 0x00000d | |
279 | #define FC_DIRSRVR_PORTID 0x00000c | |
280 | #define FC_TIMESRVR_PORTID 0x00000b | |
281 | #define FC_MGMTSRVR_PORTID 0x00000a | |
282 | ||
283 | ||
c4028958 DH |
284 | static void fc_timeout_deleted_rport(struct work_struct *work); |
285 | static void fc_timeout_fail_rport_io(struct work_struct *work); | |
286 | static void fc_scsi_scan_rport(struct work_struct *work); | |
1da177e4 LT |
287 | |
288 | /* | |
289 | * Attribute counts pre object type... | |
290 | * Increase these values if you add attributes | |
291 | */ | |
292 | #define FC_STARGET_NUM_ATTRS 3 | |
0f29b966 | 293 | #define FC_RPORT_NUM_ATTRS 10 |
a53eb5e0 | 294 | #define FC_VPORT_NUM_ATTRS 9 |
4643682b | 295 | #define FC_HOST_NUM_ATTRS 22 |
1da177e4 LT |
296 | |
297 | struct fc_internal { | |
298 | struct scsi_transport_template t; | |
299 | struct fc_function_template *f; | |
300 | ||
301 | /* | |
302 | * For attributes : each object has : | |
303 | * An array of the actual attributes structures | |
304 | * An array of null-terminated pointers to the attribute | |
305 | * structures - used for mid-layer interaction. | |
306 | * | |
307 | * The attribute containers for the starget and host are are | |
308 | * part of the midlayer. As the remote port is specific to the | |
309 | * fc transport, we must provide the attribute container. | |
310 | */ | |
ee959b00 | 311 | struct device_attribute private_starget_attrs[ |
1da177e4 | 312 | FC_STARGET_NUM_ATTRS]; |
ee959b00 | 313 | struct device_attribute *starget_attrs[FC_STARGET_NUM_ATTRS + 1]; |
1da177e4 | 314 | |
ee959b00 TJ |
315 | struct device_attribute private_host_attrs[FC_HOST_NUM_ATTRS]; |
316 | struct device_attribute *host_attrs[FC_HOST_NUM_ATTRS + 1]; | |
1da177e4 LT |
317 | |
318 | struct transport_container rport_attr_cont; | |
ee959b00 TJ |
319 | struct device_attribute private_rport_attrs[FC_RPORT_NUM_ATTRS]; |
320 | struct device_attribute *rport_attrs[FC_RPORT_NUM_ATTRS + 1]; | |
a53eb5e0 JS |
321 | |
322 | struct transport_container vport_attr_cont; | |
ee959b00 TJ |
323 | struct device_attribute private_vport_attrs[FC_VPORT_NUM_ATTRS]; |
324 | struct device_attribute *vport_attrs[FC_VPORT_NUM_ATTRS + 1]; | |
1da177e4 LT |
325 | }; |
326 | ||
327 | #define to_fc_internal(tmpl) container_of(tmpl, struct fc_internal, t) | |
328 | ||
d0a7e574 | 329 | static int fc_target_setup(struct transport_container *tc, struct device *dev, |
ee959b00 | 330 | struct device *cdev) |
1da177e4 LT |
331 | { |
332 | struct scsi_target *starget = to_scsi_target(dev); | |
333 | struct fc_rport *rport = starget_to_rport(starget); | |
334 | ||
335 | /* | |
336 | * if parent is remote port, use values from remote port. | |
337 | * Otherwise, this host uses the fc_transport, but not the | |
338 | * remote port interface. As such, initialize to known non-values. | |
339 | */ | |
340 | if (rport) { | |
341 | fc_starget_node_name(starget) = rport->node_name; | |
342 | fc_starget_port_name(starget) = rport->port_name; | |
343 | fc_starget_port_id(starget) = rport->port_id; | |
344 | } else { | |
345 | fc_starget_node_name(starget) = -1; | |
346 | fc_starget_port_name(starget) = -1; | |
347 | fc_starget_port_id(starget) = -1; | |
348 | } | |
349 | ||
350 | return 0; | |
351 | } | |
352 | ||
353 | static DECLARE_TRANSPORT_CLASS(fc_transport_class, | |
354 | "fc_transport", | |
355 | fc_target_setup, | |
356 | NULL, | |
357 | NULL); | |
358 | ||
d0a7e574 | 359 | static int fc_host_setup(struct transport_container *tc, struct device *dev, |
ee959b00 | 360 | struct device *cdev) |
1da177e4 LT |
361 | { |
362 | struct Scsi_Host *shost = dev_to_shost(dev); | |
aedf3497 | 363 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
1da177e4 | 364 | |
9ef3e4a4 | 365 | /* |
1da177e4 LT |
366 | * Set default values easily detected by the midlayer as |
367 | * failure cases. The scsi lldd is responsible for initializing | |
368 | * all transport attributes to valid values per host. | |
369 | */ | |
aedf3497 JS |
370 | fc_host->node_name = -1; |
371 | fc_host->port_name = -1; | |
372 | fc_host->permanent_port_name = -1; | |
373 | fc_host->supported_classes = FC_COS_UNSPECIFIED; | |
374 | memset(fc_host->supported_fc4s, 0, | |
375 | sizeof(fc_host->supported_fc4s)); | |
aedf3497 JS |
376 | fc_host->supported_speeds = FC_PORTSPEED_UNKNOWN; |
377 | fc_host->maxframe_size = -1; | |
a53eb5e0 | 378 | fc_host->max_npiv_vports = 0; |
aedf3497 JS |
379 | memset(fc_host->serial_number, 0, |
380 | sizeof(fc_host->serial_number)); | |
381 | ||
382 | fc_host->port_id = -1; | |
383 | fc_host->port_type = FC_PORTTYPE_UNKNOWN; | |
384 | fc_host->port_state = FC_PORTSTATE_UNKNOWN; | |
385 | memset(fc_host->active_fc4s, 0, | |
386 | sizeof(fc_host->active_fc4s)); | |
387 | fc_host->speed = FC_PORTSPEED_UNKNOWN; | |
388 | fc_host->fabric_name = -1; | |
b8d08210 JS |
389 | memset(fc_host->symbolic_name, 0, sizeof(fc_host->symbolic_name)); |
390 | memset(fc_host->system_hostname, 0, sizeof(fc_host->system_hostname)); | |
aedf3497 JS |
391 | |
392 | fc_host->tgtid_bind_type = FC_TGTID_BIND_BY_WWPN; | |
393 | ||
394 | INIT_LIST_HEAD(&fc_host->rports); | |
395 | INIT_LIST_HEAD(&fc_host->rport_bindings); | |
a53eb5e0 | 396 | INIT_LIST_HEAD(&fc_host->vports); |
aedf3497 JS |
397 | fc_host->next_rport_number = 0; |
398 | fc_host->next_target_id = 0; | |
a53eb5e0 JS |
399 | fc_host->next_vport_number = 0; |
400 | fc_host->npiv_vports_inuse = 0; | |
aedf3497 | 401 | |
aab0de24 KS |
402 | snprintf(fc_host->work_q_name, sizeof(fc_host->work_q_name), |
403 | "fc_wq_%d", shost->host_no); | |
aedf3497 JS |
404 | fc_host->work_q = create_singlethread_workqueue( |
405 | fc_host->work_q_name); | |
406 | if (!fc_host->work_q) | |
407 | return -ENOMEM; | |
408 | ||
aab0de24 KS |
409 | snprintf(fc_host->devloss_work_q_name, |
410 | sizeof(fc_host->devloss_work_q_name), | |
411 | "fc_dl_%d", shost->host_no); | |
aedf3497 JS |
412 | fc_host->devloss_work_q = create_singlethread_workqueue( |
413 | fc_host->devloss_work_q_name); | |
414 | if (!fc_host->devloss_work_q) { | |
415 | destroy_workqueue(fc_host->work_q); | |
416 | fc_host->work_q = NULL; | |
417 | return -ENOMEM; | |
418 | } | |
419 | ||
9e4f5e29 JS |
420 | fc_bsg_hostadd(shost, fc_host); |
421 | /* ignore any bsg add error - we just can't do sgio */ | |
422 | ||
423 | return 0; | |
424 | } | |
425 | ||
426 | static int fc_host_remove(struct transport_container *tc, struct device *dev, | |
427 | struct device *cdev) | |
428 | { | |
429 | struct Scsi_Host *shost = dev_to_shost(dev); | |
430 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); | |
431 | ||
432 | fc_bsg_remove(fc_host->rqst_q); | |
1da177e4 LT |
433 | return 0; |
434 | } | |
435 | ||
436 | static DECLARE_TRANSPORT_CLASS(fc_host_class, | |
437 | "fc_host", | |
438 | fc_host_setup, | |
9e4f5e29 | 439 | fc_host_remove, |
1da177e4 LT |
440 | NULL); |
441 | ||
442 | /* | |
443 | * Setup and Remove actions for remote ports are handled | |
444 | * in the service functions below. | |
445 | */ | |
446 | static DECLARE_TRANSPORT_CLASS(fc_rport_class, | |
447 | "fc_remote_ports", | |
448 | NULL, | |
449 | NULL, | |
450 | NULL); | |
451 | ||
a53eb5e0 JS |
452 | /* |
453 | * Setup and Remove actions for virtual ports are handled | |
454 | * in the service functions below. | |
455 | */ | |
456 | static DECLARE_TRANSPORT_CLASS(fc_vport_class, | |
457 | "fc_vports", | |
458 | NULL, | |
459 | NULL, | |
460 | NULL); | |
461 | ||
1da177e4 LT |
462 | /* |
463 | * Module Parameters | |
464 | */ | |
465 | ||
466 | /* | |
467 | * dev_loss_tmo: the default number of seconds that the FC transport | |
468 | * should insulate the loss of a remote port. | |
469 | * The maximum will be capped by the value of SCSI_DEVICE_BLOCK_MAX_TIMEOUT. | |
470 | */ | |
1c9e16e4 | 471 | static unsigned int fc_dev_loss_tmo = 60; /* seconds */ |
1da177e4 | 472 | |
10f4b89a | 473 | module_param_named(dev_loss_tmo, fc_dev_loss_tmo, uint, S_IRUGO|S_IWUSR); |
1da177e4 LT |
474 | MODULE_PARM_DESC(dev_loss_tmo, |
475 | "Maximum number of seconds that the FC transport should" | |
476 | " insulate the loss of a remote port. Once this value is" | |
477 | " exceeded, the scsi target is removed. Value should be" | |
f2818663 HR |
478 | " between 1 and SCSI_DEVICE_BLOCK_MAX_TIMEOUT if" |
479 | " fast_io_fail_tmo is not set."); | |
1da177e4 | 480 | |
eb44820c | 481 | /* |
84314fd4 | 482 | * Netlink Infrastructure |
eb44820c | 483 | */ |
84314fd4 JS |
484 | |
485 | static atomic_t fc_event_seq; | |
486 | ||
487 | /** | |
488 | * fc_get_event_number - Obtain the next sequential FC event number | |
489 | * | |
490 | * Notes: | |
eb44820c | 491 | * We could have inlined this, but it would have required fc_event_seq to |
84314fd4 JS |
492 | * be exposed. For now, live with the subroutine call. |
493 | * Atomic used to avoid lock/unlock... | |
eb44820c | 494 | */ |
84314fd4 JS |
495 | u32 |
496 | fc_get_event_number(void) | |
497 | { | |
498 | return atomic_add_return(1, &fc_event_seq); | |
499 | } | |
500 | EXPORT_SYMBOL(fc_get_event_number); | |
501 | ||
502 | ||
503 | /** | |
504 | * fc_host_post_event - called to post an even on an fc_host. | |
84314fd4 JS |
505 | * @shost: host the event occurred on |
506 | * @event_number: fc event number obtained from get_fc_event_number() | |
507 | * @event_code: fc_host event being posted | |
508 | * @event_data: 32bits of data for the event being posted | |
509 | * | |
510 | * Notes: | |
511 | * This routine assumes no locks are held on entry. | |
eb44820c | 512 | */ |
84314fd4 JS |
513 | void |
514 | fc_host_post_event(struct Scsi_Host *shost, u32 event_number, | |
515 | enum fc_host_event_code event_code, u32 event_data) | |
516 | { | |
517 | struct sk_buff *skb; | |
518 | struct nlmsghdr *nlh; | |
519 | struct fc_nl_event *event; | |
520 | const char *name; | |
521 | u32 len, skblen; | |
522 | int err; | |
523 | ||
524 | if (!scsi_nl_sock) { | |
525 | err = -ENOENT; | |
526 | goto send_fail; | |
527 | } | |
528 | ||
529 | len = FC_NL_MSGALIGN(sizeof(*event)); | |
530 | skblen = NLMSG_SPACE(len); | |
531 | ||
532 | skb = alloc_skb(skblen, GFP_KERNEL); | |
533 | if (!skb) { | |
534 | err = -ENOBUFS; | |
535 | goto send_fail; | |
536 | } | |
537 | ||
538 | nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, | |
539 | skblen - sizeof(*nlh), 0); | |
540 | if (!nlh) { | |
541 | err = -ENOBUFS; | |
542 | goto send_fail_skb; | |
543 | } | |
544 | event = NLMSG_DATA(nlh); | |
545 | ||
546 | INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC, | |
547 | FC_NL_ASYNC_EVENT, len); | |
548 | event->seconds = get_seconds(); | |
549 | event->vendor_id = 0; | |
550 | event->host_no = shost->host_no; | |
551 | event->event_datalen = sizeof(u32); /* bytes */ | |
552 | event->event_num = event_number; | |
553 | event->event_code = event_code; | |
554 | event->event_data = event_data; | |
555 | ||
ff491a73 PNA |
556 | nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS, |
557 | GFP_KERNEL); | |
84314fd4 JS |
558 | return; |
559 | ||
560 | send_fail_skb: | |
561 | kfree_skb(skb); | |
562 | send_fail: | |
563 | name = get_fc_host_event_code_name(event_code); | |
564 | printk(KERN_WARNING | |
565 | "%s: Dropped Event : host %d %s data 0x%08x - err %d\n", | |
cadbd4a5 | 566 | __func__, shost->host_no, |
84314fd4 JS |
567 | (name) ? name : "<unknown>", event_data, err); |
568 | return; | |
569 | } | |
570 | EXPORT_SYMBOL(fc_host_post_event); | |
571 | ||
572 | ||
573 | /** | |
eb44820c | 574 | * fc_host_post_vendor_event - called to post a vendor unique event on an fc_host |
84314fd4 JS |
575 | * @shost: host the event occurred on |
576 | * @event_number: fc event number obtained from get_fc_event_number() | |
577 | * @data_len: amount, in bytes, of vendor unique data | |
578 | * @data_buf: pointer to vendor unique data | |
eb44820c | 579 | * @vendor_id: Vendor id |
84314fd4 JS |
580 | * |
581 | * Notes: | |
582 | * This routine assumes no locks are held on entry. | |
eb44820c | 583 | */ |
84314fd4 JS |
584 | void |
585 | fc_host_post_vendor_event(struct Scsi_Host *shost, u32 event_number, | |
f14e2e29 | 586 | u32 data_len, char * data_buf, u64 vendor_id) |
84314fd4 JS |
587 | { |
588 | struct sk_buff *skb; | |
589 | struct nlmsghdr *nlh; | |
590 | struct fc_nl_event *event; | |
591 | u32 len, skblen; | |
592 | int err; | |
593 | ||
594 | if (!scsi_nl_sock) { | |
595 | err = -ENOENT; | |
596 | goto send_vendor_fail; | |
597 | } | |
598 | ||
599 | len = FC_NL_MSGALIGN(sizeof(*event) + data_len); | |
600 | skblen = NLMSG_SPACE(len); | |
601 | ||
602 | skb = alloc_skb(skblen, GFP_KERNEL); | |
603 | if (!skb) { | |
604 | err = -ENOBUFS; | |
605 | goto send_vendor_fail; | |
606 | } | |
607 | ||
608 | nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, | |
609 | skblen - sizeof(*nlh), 0); | |
610 | if (!nlh) { | |
611 | err = -ENOBUFS; | |
612 | goto send_vendor_fail_skb; | |
613 | } | |
614 | event = NLMSG_DATA(nlh); | |
615 | ||
616 | INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC, | |
617 | FC_NL_ASYNC_EVENT, len); | |
618 | event->seconds = get_seconds(); | |
619 | event->vendor_id = vendor_id; | |
620 | event->host_no = shost->host_no; | |
621 | event->event_datalen = data_len; /* bytes */ | |
622 | event->event_num = event_number; | |
623 | event->event_code = FCH_EVT_VENDOR_UNIQUE; | |
624 | memcpy(&event->event_data, data_buf, data_len); | |
625 | ||
ff491a73 PNA |
626 | nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS, |
627 | GFP_KERNEL); | |
84314fd4 JS |
628 | return; |
629 | ||
630 | send_vendor_fail_skb: | |
631 | kfree_skb(skb); | |
632 | send_vendor_fail: | |
633 | printk(KERN_WARNING | |
634 | "%s: Dropped Event : host %d vendor_unique - err %d\n", | |
cadbd4a5 | 635 | __func__, shost->host_no, err); |
84314fd4 JS |
636 | return; |
637 | } | |
638 | EXPORT_SYMBOL(fc_host_post_vendor_event); | |
639 | ||
640 | ||
1da177e4 LT |
641 | |
642 | static __init int fc_transport_init(void) | |
643 | { | |
84314fd4 JS |
644 | int error; |
645 | ||
646 | atomic_set(&fc_event_seq, 0); | |
647 | ||
648 | error = transport_class_register(&fc_host_class); | |
a53eb5e0 JS |
649 | if (error) |
650 | return error; | |
651 | error = transport_class_register(&fc_vport_class); | |
1da177e4 | 652 | if (error) |
48de68a4 | 653 | goto unreg_host_class; |
1da177e4 LT |
654 | error = transport_class_register(&fc_rport_class); |
655 | if (error) | |
48de68a4 MC |
656 | goto unreg_vport_class; |
657 | error = transport_class_register(&fc_transport_class); | |
658 | if (error) | |
659 | goto unreg_rport_class; | |
660 | return 0; | |
661 | ||
662 | unreg_rport_class: | |
663 | transport_class_unregister(&fc_rport_class); | |
664 | unreg_vport_class: | |
665 | transport_class_unregister(&fc_vport_class); | |
666 | unreg_host_class: | |
667 | transport_class_unregister(&fc_host_class); | |
668 | return error; | |
1da177e4 LT |
669 | } |
670 | ||
671 | static void __exit fc_transport_exit(void) | |
672 | { | |
673 | transport_class_unregister(&fc_transport_class); | |
674 | transport_class_unregister(&fc_rport_class); | |
675 | transport_class_unregister(&fc_host_class); | |
a53eb5e0 | 676 | transport_class_unregister(&fc_vport_class); |
1da177e4 LT |
677 | } |
678 | ||
679 | /* | |
680 | * FC Remote Port Attribute Management | |
681 | */ | |
682 | ||
683 | #define fc_rport_show_function(field, format_string, sz, cast) \ | |
684 | static ssize_t \ | |
ee959b00 TJ |
685 | show_fc_rport_##field (struct device *dev, \ |
686 | struct device_attribute *attr, char *buf) \ | |
1da177e4 | 687 | { \ |
ee959b00 | 688 | struct fc_rport *rport = transport_class_to_rport(dev); \ |
1da177e4 LT |
689 | struct Scsi_Host *shost = rport_to_shost(rport); \ |
690 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
19a7b4ae JSEC |
691 | if ((i->f->get_rport_##field) && \ |
692 | !((rport->port_state == FC_PORTSTATE_BLOCKED) || \ | |
42e33148 | 693 | (rport->port_state == FC_PORTSTATE_DELETED) || \ |
19a7b4ae | 694 | (rport->port_state == FC_PORTSTATE_NOTPRESENT))) \ |
1da177e4 LT |
695 | i->f->get_rport_##field(rport); \ |
696 | return snprintf(buf, sz, format_string, cast rport->field); \ | |
697 | } | |
698 | ||
699 | #define fc_rport_store_function(field) \ | |
700 | static ssize_t \ | |
ee959b00 TJ |
701 | store_fc_rport_##field(struct device *dev, \ |
702 | struct device_attribute *attr, \ | |
703 | const char *buf, size_t count) \ | |
1da177e4 LT |
704 | { \ |
705 | int val; \ | |
ee959b00 | 706 | struct fc_rport *rport = transport_class_to_rport(dev); \ |
1da177e4 LT |
707 | struct Scsi_Host *shost = rport_to_shost(rport); \ |
708 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
0f29b966 | 709 | char *cp; \ |
19a7b4ae | 710 | if ((rport->port_state == FC_PORTSTATE_BLOCKED) || \ |
42e33148 | 711 | (rport->port_state == FC_PORTSTATE_DELETED) || \ |
19a7b4ae JSEC |
712 | (rport->port_state == FC_PORTSTATE_NOTPRESENT)) \ |
713 | return -EBUSY; \ | |
0f29b966 JS |
714 | val = simple_strtoul(buf, &cp, 0); \ |
715 | if (*cp && (*cp != '\n')) \ | |
716 | return -EINVAL; \ | |
1da177e4 LT |
717 | i->f->set_rport_##field(rport, val); \ |
718 | return count; \ | |
719 | } | |
720 | ||
721 | #define fc_rport_rd_attr(field, format_string, sz) \ | |
722 | fc_rport_show_function(field, format_string, sz, ) \ | |
ee959b00 | 723 | static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ |
1da177e4 LT |
724 | show_fc_rport_##field, NULL) |
725 | ||
726 | #define fc_rport_rd_attr_cast(field, format_string, sz, cast) \ | |
727 | fc_rport_show_function(field, format_string, sz, (cast)) \ | |
ee959b00 | 728 | static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ |
1da177e4 LT |
729 | show_fc_rport_##field, NULL) |
730 | ||
731 | #define fc_rport_rw_attr(field, format_string, sz) \ | |
732 | fc_rport_show_function(field, format_string, sz, ) \ | |
733 | fc_rport_store_function(field) \ | |
ee959b00 | 734 | static FC_DEVICE_ATTR(rport, field, S_IRUGO | S_IWUSR, \ |
1da177e4 LT |
735 | show_fc_rport_##field, \ |
736 | store_fc_rport_##field) | |
737 | ||
738 | ||
739 | #define fc_private_rport_show_function(field, format_string, sz, cast) \ | |
740 | static ssize_t \ | |
ee959b00 TJ |
741 | show_fc_rport_##field (struct device *dev, \ |
742 | struct device_attribute *attr, char *buf) \ | |
1da177e4 | 743 | { \ |
ee959b00 | 744 | struct fc_rport *rport = transport_class_to_rport(dev); \ |
1da177e4 LT |
745 | return snprintf(buf, sz, format_string, cast rport->field); \ |
746 | } | |
747 | ||
748 | #define fc_private_rport_rd_attr(field, format_string, sz) \ | |
749 | fc_private_rport_show_function(field, format_string, sz, ) \ | |
ee959b00 | 750 | static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ |
1da177e4 LT |
751 | show_fc_rport_##field, NULL) |
752 | ||
753 | #define fc_private_rport_rd_attr_cast(field, format_string, sz, cast) \ | |
754 | fc_private_rport_show_function(field, format_string, sz, (cast)) \ | |
ee959b00 | 755 | static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ |
1da177e4 LT |
756 | show_fc_rport_##field, NULL) |
757 | ||
758 | ||
759 | #define fc_private_rport_rd_enum_attr(title, maxlen) \ | |
760 | static ssize_t \ | |
ee959b00 TJ |
761 | show_fc_rport_##title (struct device *dev, \ |
762 | struct device_attribute *attr, char *buf) \ | |
1da177e4 | 763 | { \ |
ee959b00 | 764 | struct fc_rport *rport = transport_class_to_rport(dev); \ |
1da177e4 LT |
765 | const char *name; \ |
766 | name = get_fc_##title##_name(rport->title); \ | |
767 | if (!name) \ | |
768 | return -EINVAL; \ | |
769 | return snprintf(buf, maxlen, "%s\n", name); \ | |
770 | } \ | |
ee959b00 | 771 | static FC_DEVICE_ATTR(rport, title, S_IRUGO, \ |
1da177e4 LT |
772 | show_fc_rport_##title, NULL) |
773 | ||
774 | ||
775 | #define SETUP_RPORT_ATTRIBUTE_RD(field) \ | |
ee959b00 | 776 | i->private_rport_attrs[count] = device_attr_rport_##field; \ |
1da177e4 LT |
777 | i->private_rport_attrs[count].attr.mode = S_IRUGO; \ |
778 | i->private_rport_attrs[count].store = NULL; \ | |
779 | i->rport_attrs[count] = &i->private_rport_attrs[count]; \ | |
780 | if (i->f->show_rport_##field) \ | |
781 | count++ | |
782 | ||
783 | #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(field) \ | |
ee959b00 | 784 | i->private_rport_attrs[count] = device_attr_rport_##field; \ |
1da177e4 LT |
785 | i->private_rport_attrs[count].attr.mode = S_IRUGO; \ |
786 | i->private_rport_attrs[count].store = NULL; \ | |
787 | i->rport_attrs[count] = &i->private_rport_attrs[count]; \ | |
788 | count++ | |
789 | ||
790 | #define SETUP_RPORT_ATTRIBUTE_RW(field) \ | |
ee959b00 | 791 | i->private_rport_attrs[count] = device_attr_rport_##field; \ |
1da177e4 LT |
792 | if (!i->f->set_rport_##field) { \ |
793 | i->private_rport_attrs[count].attr.mode = S_IRUGO; \ | |
794 | i->private_rport_attrs[count].store = NULL; \ | |
795 | } \ | |
796 | i->rport_attrs[count] = &i->private_rport_attrs[count]; \ | |
797 | if (i->f->show_rport_##field) \ | |
798 | count++ | |
799 | ||
0f29b966 JS |
800 | #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(field) \ |
801 | { \ | |
ee959b00 | 802 | i->private_rport_attrs[count] = device_attr_rport_##field; \ |
0f29b966 JS |
803 | i->rport_attrs[count] = &i->private_rport_attrs[count]; \ |
804 | count++; \ | |
805 | } | |
806 | ||
1da177e4 LT |
807 | |
808 | /* The FC Transport Remote Port Attributes: */ | |
809 | ||
810 | /* Fixed Remote Port Attributes */ | |
811 | ||
812 | fc_private_rport_rd_attr(maxframe_size, "%u bytes\n", 20); | |
813 | ||
814 | static ssize_t | |
ee959b00 TJ |
815 | show_fc_rport_supported_classes (struct device *dev, |
816 | struct device_attribute *attr, char *buf) | |
1da177e4 | 817 | { |
ee959b00 | 818 | struct fc_rport *rport = transport_class_to_rport(dev); |
1da177e4 LT |
819 | if (rport->supported_classes == FC_COS_UNSPECIFIED) |
820 | return snprintf(buf, 20, "unspecified\n"); | |
821 | return get_fc_cos_names(rport->supported_classes, buf); | |
822 | } | |
ee959b00 | 823 | static FC_DEVICE_ATTR(rport, supported_classes, S_IRUGO, |
1da177e4 LT |
824 | show_fc_rport_supported_classes, NULL); |
825 | ||
826 | /* Dynamic Remote Port Attributes */ | |
827 | ||
19a7b4ae JSEC |
828 | /* |
829 | * dev_loss_tmo attribute | |
830 | */ | |
831 | fc_rport_show_function(dev_loss_tmo, "%d\n", 20, ) | |
832 | static ssize_t | |
ee959b00 TJ |
833 | store_fc_rport_dev_loss_tmo(struct device *dev, struct device_attribute *attr, |
834 | const char *buf, size_t count) | |
19a7b4ae JSEC |
835 | { |
836 | int val; | |
ee959b00 | 837 | struct fc_rport *rport = transport_class_to_rport(dev); |
19a7b4ae JSEC |
838 | struct Scsi_Host *shost = rport_to_shost(rport); |
839 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
0f29b966 | 840 | char *cp; |
19a7b4ae | 841 | if ((rport->port_state == FC_PORTSTATE_BLOCKED) || |
42e33148 | 842 | (rport->port_state == FC_PORTSTATE_DELETED) || |
19a7b4ae JSEC |
843 | (rport->port_state == FC_PORTSTATE_NOTPRESENT)) |
844 | return -EBUSY; | |
0f29b966 | 845 | val = simple_strtoul(buf, &cp, 0); |
f2818663 | 846 | if ((*cp && (*cp != '\n')) || (val < 0)) |
19a7b4ae | 847 | return -EINVAL; |
f2818663 HR |
848 | |
849 | /* | |
850 | * If fast_io_fail is off we have to cap | |
851 | * dev_loss_tmo at SCSI_DEVICE_BLOCK_MAX_TIMEOUT | |
852 | */ | |
853 | if (rport->fast_io_fail_tmo == -1 && | |
854 | val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT) | |
855 | return -EINVAL; | |
856 | ||
19a7b4ae JSEC |
857 | i->f->set_rport_dev_loss_tmo(rport, val); |
858 | return count; | |
859 | } | |
ee959b00 | 860 | static FC_DEVICE_ATTR(rport, dev_loss_tmo, S_IRUGO | S_IWUSR, |
19a7b4ae | 861 | show_fc_rport_dev_loss_tmo, store_fc_rport_dev_loss_tmo); |
1da177e4 LT |
862 | |
863 | ||
864 | /* Private Remote Port Attributes */ | |
865 | ||
866 | fc_private_rport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); | |
867 | fc_private_rport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); | |
868 | fc_private_rport_rd_attr(port_id, "0x%06x\n", 20); | |
869 | ||
870 | static ssize_t | |
ee959b00 TJ |
871 | show_fc_rport_roles (struct device *dev, struct device_attribute *attr, |
872 | char *buf) | |
1da177e4 | 873 | { |
ee959b00 | 874 | struct fc_rport *rport = transport_class_to_rport(dev); |
1da177e4 LT |
875 | |
876 | /* identify any roles that are port_id specific */ | |
877 | if ((rport->port_id != -1) && | |
878 | (rport->port_id & FC_WELLKNOWN_PORTID_MASK) == | |
879 | FC_WELLKNOWN_PORTID_MASK) { | |
880 | switch (rport->port_id & FC_WELLKNOWN_ROLE_MASK) { | |
881 | case FC_FPORT_PORTID: | |
882 | return snprintf(buf, 30, "Fabric Port\n"); | |
883 | case FC_FABCTLR_PORTID: | |
884 | return snprintf(buf, 30, "Fabric Controller\n"); | |
885 | case FC_DIRSRVR_PORTID: | |
886 | return snprintf(buf, 30, "Directory Server\n"); | |
887 | case FC_TIMESRVR_PORTID: | |
888 | return snprintf(buf, 30, "Time Server\n"); | |
889 | case FC_MGMTSRVR_PORTID: | |
890 | return snprintf(buf, 30, "Management Server\n"); | |
891 | default: | |
892 | return snprintf(buf, 30, "Unknown Fabric Entity\n"); | |
893 | } | |
894 | } else { | |
a53eb5e0 | 895 | if (rport->roles == FC_PORT_ROLE_UNKNOWN) |
1da177e4 | 896 | return snprintf(buf, 20, "unknown\n"); |
a53eb5e0 | 897 | return get_fc_port_roles_names(rport->roles, buf); |
1da177e4 LT |
898 | } |
899 | } | |
ee959b00 | 900 | static FC_DEVICE_ATTR(rport, roles, S_IRUGO, |
1da177e4 LT |
901 | show_fc_rport_roles, NULL); |
902 | ||
903 | fc_private_rport_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN); | |
904 | fc_private_rport_rd_attr(scsi_target_id, "%d\n", 20); | |
905 | ||
0f29b966 JS |
906 | /* |
907 | * fast_io_fail_tmo attribute | |
908 | */ | |
909 | static ssize_t | |
ee959b00 TJ |
910 | show_fc_rport_fast_io_fail_tmo (struct device *dev, |
911 | struct device_attribute *attr, char *buf) | |
0f29b966 | 912 | { |
ee959b00 | 913 | struct fc_rport *rport = transport_class_to_rport(dev); |
0f29b966 JS |
914 | |
915 | if (rport->fast_io_fail_tmo == -1) | |
916 | return snprintf(buf, 5, "off\n"); | |
917 | return snprintf(buf, 20, "%d\n", rport->fast_io_fail_tmo); | |
918 | } | |
919 | ||
920 | static ssize_t | |
ee959b00 TJ |
921 | store_fc_rport_fast_io_fail_tmo(struct device *dev, |
922 | struct device_attribute *attr, const char *buf, | |
923 | size_t count) | |
0f29b966 JS |
924 | { |
925 | int val; | |
926 | char *cp; | |
ee959b00 | 927 | struct fc_rport *rport = transport_class_to_rport(dev); |
0f29b966 JS |
928 | |
929 | if ((rport->port_state == FC_PORTSTATE_BLOCKED) || | |
930 | (rport->port_state == FC_PORTSTATE_DELETED) || | |
931 | (rport->port_state == FC_PORTSTATE_NOTPRESENT)) | |
932 | return -EBUSY; | |
933 | if (strncmp(buf, "off", 3) == 0) | |
934 | rport->fast_io_fail_tmo = -1; | |
935 | else { | |
936 | val = simple_strtoul(buf, &cp, 0); | |
f2818663 HR |
937 | if ((*cp && (*cp != '\n')) || (val < 0)) |
938 | return -EINVAL; | |
939 | /* | |
940 | * Cap fast_io_fail by dev_loss_tmo or | |
941 | * SCSI_DEVICE_BLOCK_MAX_TIMEOUT. | |
942 | */ | |
943 | if ((val >= rport->dev_loss_tmo) || | |
944 | (val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT)) | |
0f29b966 | 945 | return -EINVAL; |
f2818663 | 946 | |
0f29b966 JS |
947 | rport->fast_io_fail_tmo = val; |
948 | } | |
949 | return count; | |
950 | } | |
ee959b00 | 951 | static FC_DEVICE_ATTR(rport, fast_io_fail_tmo, S_IRUGO | S_IWUSR, |
0f29b966 | 952 | show_fc_rport_fast_io_fail_tmo, store_fc_rport_fast_io_fail_tmo); |
1da177e4 LT |
953 | |
954 | ||
955 | /* | |
956 | * FC SCSI Target Attribute Management | |
957 | */ | |
958 | ||
959 | /* | |
960 | * Note: in the target show function we recognize when the remote | |
a53eb5e0 | 961 | * port is in the heirarchy and do not allow the driver to get |
1da177e4 LT |
962 | * involved in sysfs functions. The driver only gets involved if |
963 | * it's the "old" style that doesn't use rports. | |
964 | */ | |
965 | #define fc_starget_show_function(field, format_string, sz, cast) \ | |
966 | static ssize_t \ | |
ee959b00 TJ |
967 | show_fc_starget_##field (struct device *dev, \ |
968 | struct device_attribute *attr, char *buf) \ | |
1da177e4 | 969 | { \ |
ee959b00 | 970 | struct scsi_target *starget = transport_class_to_starget(dev); \ |
1da177e4 LT |
971 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \ |
972 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
973 | struct fc_rport *rport = starget_to_rport(starget); \ | |
974 | if (rport) \ | |
975 | fc_starget_##field(starget) = rport->field; \ | |
976 | else if (i->f->get_starget_##field) \ | |
977 | i->f->get_starget_##field(starget); \ | |
978 | return snprintf(buf, sz, format_string, \ | |
979 | cast fc_starget_##field(starget)); \ | |
980 | } | |
981 | ||
982 | #define fc_starget_rd_attr(field, format_string, sz) \ | |
983 | fc_starget_show_function(field, format_string, sz, ) \ | |
ee959b00 | 984 | static FC_DEVICE_ATTR(starget, field, S_IRUGO, \ |
1da177e4 LT |
985 | show_fc_starget_##field, NULL) |
986 | ||
987 | #define fc_starget_rd_attr_cast(field, format_string, sz, cast) \ | |
988 | fc_starget_show_function(field, format_string, sz, (cast)) \ | |
ee959b00 | 989 | static FC_DEVICE_ATTR(starget, field, S_IRUGO, \ |
1da177e4 LT |
990 | show_fc_starget_##field, NULL) |
991 | ||
992 | #define SETUP_STARGET_ATTRIBUTE_RD(field) \ | |
ee959b00 | 993 | i->private_starget_attrs[count] = device_attr_starget_##field; \ |
1da177e4 LT |
994 | i->private_starget_attrs[count].attr.mode = S_IRUGO; \ |
995 | i->private_starget_attrs[count].store = NULL; \ | |
996 | i->starget_attrs[count] = &i->private_starget_attrs[count]; \ | |
997 | if (i->f->show_starget_##field) \ | |
998 | count++ | |
999 | ||
1000 | #define SETUP_STARGET_ATTRIBUTE_RW(field) \ | |
ee959b00 | 1001 | i->private_starget_attrs[count] = device_attr_starget_##field; \ |
1da177e4 LT |
1002 | if (!i->f->set_starget_##field) { \ |
1003 | i->private_starget_attrs[count].attr.mode = S_IRUGO; \ | |
1004 | i->private_starget_attrs[count].store = NULL; \ | |
1005 | } \ | |
1006 | i->starget_attrs[count] = &i->private_starget_attrs[count]; \ | |
1007 | if (i->f->show_starget_##field) \ | |
1008 | count++ | |
1009 | ||
1010 | /* The FC Transport SCSI Target Attributes: */ | |
1011 | fc_starget_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); | |
1012 | fc_starget_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); | |
1013 | fc_starget_rd_attr(port_id, "0x%06x\n", 20); | |
1014 | ||
1015 | ||
a53eb5e0 JS |
1016 | /* |
1017 | * FC Virtual Port Attribute Management | |
1018 | */ | |
1019 | ||
1020 | #define fc_vport_show_function(field, format_string, sz, cast) \ | |
1021 | static ssize_t \ | |
ee959b00 TJ |
1022 | show_fc_vport_##field (struct device *dev, \ |
1023 | struct device_attribute *attr, char *buf) \ | |
a53eb5e0 | 1024 | { \ |
ee959b00 | 1025 | struct fc_vport *vport = transport_class_to_vport(dev); \ |
a53eb5e0 JS |
1026 | struct Scsi_Host *shost = vport_to_shost(vport); \ |
1027 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
1028 | if ((i->f->get_vport_##field) && \ | |
1029 | !(vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))) \ | |
1030 | i->f->get_vport_##field(vport); \ | |
1031 | return snprintf(buf, sz, format_string, cast vport->field); \ | |
1032 | } | |
1033 | ||
1034 | #define fc_vport_store_function(field) \ | |
1035 | static ssize_t \ | |
ee959b00 TJ |
1036 | store_fc_vport_##field(struct device *dev, \ |
1037 | struct device_attribute *attr, \ | |
1038 | const char *buf, size_t count) \ | |
a53eb5e0 JS |
1039 | { \ |
1040 | int val; \ | |
ee959b00 | 1041 | struct fc_vport *vport = transport_class_to_vport(dev); \ |
a53eb5e0 JS |
1042 | struct Scsi_Host *shost = vport_to_shost(vport); \ |
1043 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
1044 | char *cp; \ | |
1045 | if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \ | |
1046 | return -EBUSY; \ | |
1047 | val = simple_strtoul(buf, &cp, 0); \ | |
1048 | if (*cp && (*cp != '\n')) \ | |
1049 | return -EINVAL; \ | |
1050 | i->f->set_vport_##field(vport, val); \ | |
1051 | return count; \ | |
1052 | } | |
1053 | ||
1054 | #define fc_vport_store_str_function(field, slen) \ | |
1055 | static ssize_t \ | |
ee959b00 TJ |
1056 | store_fc_vport_##field(struct device *dev, \ |
1057 | struct device_attribute *attr, \ | |
1058 | const char *buf, size_t count) \ | |
a53eb5e0 | 1059 | { \ |
ee959b00 | 1060 | struct fc_vport *vport = transport_class_to_vport(dev); \ |
a53eb5e0 JS |
1061 | struct Scsi_Host *shost = vport_to_shost(vport); \ |
1062 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
1063 | unsigned int cnt=count; \ | |
1064 | \ | |
1065 | /* count may include a LF at end of string */ \ | |
1066 | if (buf[cnt-1] == '\n') \ | |
1067 | cnt--; \ | |
1068 | if (cnt > ((slen) - 1)) \ | |
1069 | return -EINVAL; \ | |
1070 | memcpy(vport->field, buf, cnt); \ | |
1071 | i->f->set_vport_##field(vport); \ | |
1072 | return count; \ | |
1073 | } | |
1074 | ||
1075 | #define fc_vport_rd_attr(field, format_string, sz) \ | |
1076 | fc_vport_show_function(field, format_string, sz, ) \ | |
ee959b00 | 1077 | static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ |
a53eb5e0 JS |
1078 | show_fc_vport_##field, NULL) |
1079 | ||
1080 | #define fc_vport_rd_attr_cast(field, format_string, sz, cast) \ | |
1081 | fc_vport_show_function(field, format_string, sz, (cast)) \ | |
ee959b00 | 1082 | static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ |
a53eb5e0 JS |
1083 | show_fc_vport_##field, NULL) |
1084 | ||
1085 | #define fc_vport_rw_attr(field, format_string, sz) \ | |
1086 | fc_vport_show_function(field, format_string, sz, ) \ | |
1087 | fc_vport_store_function(field) \ | |
ee959b00 | 1088 | static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \ |
a53eb5e0 JS |
1089 | show_fc_vport_##field, \ |
1090 | store_fc_vport_##field) | |
1091 | ||
1092 | #define fc_private_vport_show_function(field, format_string, sz, cast) \ | |
1093 | static ssize_t \ | |
ee959b00 TJ |
1094 | show_fc_vport_##field (struct device *dev, \ |
1095 | struct device_attribute *attr, char *buf) \ | |
a53eb5e0 | 1096 | { \ |
ee959b00 | 1097 | struct fc_vport *vport = transport_class_to_vport(dev); \ |
a53eb5e0 JS |
1098 | return snprintf(buf, sz, format_string, cast vport->field); \ |
1099 | } | |
1100 | ||
1101 | #define fc_private_vport_store_u32_function(field) \ | |
1102 | static ssize_t \ | |
ee959b00 TJ |
1103 | store_fc_vport_##field(struct device *dev, \ |
1104 | struct device_attribute *attr, \ | |
1105 | const char *buf, size_t count) \ | |
a53eb5e0 JS |
1106 | { \ |
1107 | u32 val; \ | |
ee959b00 | 1108 | struct fc_vport *vport = transport_class_to_vport(dev); \ |
a53eb5e0 JS |
1109 | char *cp; \ |
1110 | if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \ | |
1111 | return -EBUSY; \ | |
1112 | val = simple_strtoul(buf, &cp, 0); \ | |
1113 | if (*cp && (*cp != '\n')) \ | |
1114 | return -EINVAL; \ | |
1115 | vport->field = val; \ | |
1116 | return count; \ | |
1117 | } | |
1118 | ||
1119 | ||
1120 | #define fc_private_vport_rd_attr(field, format_string, sz) \ | |
1121 | fc_private_vport_show_function(field, format_string, sz, ) \ | |
ee959b00 | 1122 | static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ |
a53eb5e0 JS |
1123 | show_fc_vport_##field, NULL) |
1124 | ||
1125 | #define fc_private_vport_rd_attr_cast(field, format_string, sz, cast) \ | |
1126 | fc_private_vport_show_function(field, format_string, sz, (cast)) \ | |
ee959b00 | 1127 | static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ |
a53eb5e0 JS |
1128 | show_fc_vport_##field, NULL) |
1129 | ||
1130 | #define fc_private_vport_rw_u32_attr(field, format_string, sz) \ | |
1131 | fc_private_vport_show_function(field, format_string, sz, ) \ | |
1132 | fc_private_vport_store_u32_function(field) \ | |
ee959b00 | 1133 | static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \ |
a53eb5e0 JS |
1134 | show_fc_vport_##field, \ |
1135 | store_fc_vport_##field) | |
1136 | ||
1137 | ||
1138 | #define fc_private_vport_rd_enum_attr(title, maxlen) \ | |
1139 | static ssize_t \ | |
ee959b00 TJ |
1140 | show_fc_vport_##title (struct device *dev, \ |
1141 | struct device_attribute *attr, \ | |
1142 | char *buf) \ | |
a53eb5e0 | 1143 | { \ |
ee959b00 | 1144 | struct fc_vport *vport = transport_class_to_vport(dev); \ |
a53eb5e0 JS |
1145 | const char *name; \ |
1146 | name = get_fc_##title##_name(vport->title); \ | |
1147 | if (!name) \ | |
1148 | return -EINVAL; \ | |
1149 | return snprintf(buf, maxlen, "%s\n", name); \ | |
1150 | } \ | |
ee959b00 | 1151 | static FC_DEVICE_ATTR(vport, title, S_IRUGO, \ |
a53eb5e0 JS |
1152 | show_fc_vport_##title, NULL) |
1153 | ||
1154 | ||
1155 | #define SETUP_VPORT_ATTRIBUTE_RD(field) \ | |
ee959b00 | 1156 | i->private_vport_attrs[count] = device_attr_vport_##field; \ |
a53eb5e0 JS |
1157 | i->private_vport_attrs[count].attr.mode = S_IRUGO; \ |
1158 | i->private_vport_attrs[count].store = NULL; \ | |
1159 | i->vport_attrs[count] = &i->private_vport_attrs[count]; \ | |
1160 | if (i->f->get_##field) \ | |
1161 | count++ | |
1162 | /* NOTE: Above MACRO differs: checks function not show bit */ | |
1163 | ||
1164 | #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(field) \ | |
ee959b00 | 1165 | i->private_vport_attrs[count] = device_attr_vport_##field; \ |
a53eb5e0 JS |
1166 | i->private_vport_attrs[count].attr.mode = S_IRUGO; \ |
1167 | i->private_vport_attrs[count].store = NULL; \ | |
1168 | i->vport_attrs[count] = &i->private_vport_attrs[count]; \ | |
1169 | count++ | |
1170 | ||
1171 | #define SETUP_VPORT_ATTRIBUTE_WR(field) \ | |
ee959b00 | 1172 | i->private_vport_attrs[count] = device_attr_vport_##field; \ |
a53eb5e0 JS |
1173 | i->vport_attrs[count] = &i->private_vport_attrs[count]; \ |
1174 | if (i->f->field) \ | |
1175 | count++ | |
1176 | /* NOTE: Above MACRO differs: checks function */ | |
1177 | ||
1178 | #define SETUP_VPORT_ATTRIBUTE_RW(field) \ | |
ee959b00 | 1179 | i->private_vport_attrs[count] = device_attr_vport_##field; \ |
a53eb5e0 JS |
1180 | if (!i->f->set_vport_##field) { \ |
1181 | i->private_vport_attrs[count].attr.mode = S_IRUGO; \ | |
1182 | i->private_vport_attrs[count].store = NULL; \ | |
1183 | } \ | |
1184 | i->vport_attrs[count] = &i->private_vport_attrs[count]; \ | |
1185 | count++ | |
1186 | /* NOTE: Above MACRO differs: does not check show bit */ | |
1187 | ||
1188 | #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RW(field) \ | |
1189 | { \ | |
ee959b00 | 1190 | i->private_vport_attrs[count] = device_attr_vport_##field; \ |
a53eb5e0 JS |
1191 | i->vport_attrs[count] = &i->private_vport_attrs[count]; \ |
1192 | count++; \ | |
1193 | } | |
1194 | ||
1195 | ||
1196 | /* The FC Transport Virtual Port Attributes: */ | |
1197 | ||
1198 | /* Fixed Virtual Port Attributes */ | |
1199 | ||
1200 | /* Dynamic Virtual Port Attributes */ | |
1201 | ||
1202 | /* Private Virtual Port Attributes */ | |
1203 | ||
1204 | fc_private_vport_rd_enum_attr(vport_state, FC_VPORTSTATE_MAX_NAMELEN); | |
1205 | fc_private_vport_rd_enum_attr(vport_last_state, FC_VPORTSTATE_MAX_NAMELEN); | |
1206 | fc_private_vport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); | |
1207 | fc_private_vport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); | |
1208 | ||
1209 | static ssize_t | |
ee959b00 TJ |
1210 | show_fc_vport_roles (struct device *dev, struct device_attribute *attr, |
1211 | char *buf) | |
a53eb5e0 | 1212 | { |
ee959b00 | 1213 | struct fc_vport *vport = transport_class_to_vport(dev); |
a53eb5e0 JS |
1214 | |
1215 | if (vport->roles == FC_PORT_ROLE_UNKNOWN) | |
1216 | return snprintf(buf, 20, "unknown\n"); | |
1217 | return get_fc_port_roles_names(vport->roles, buf); | |
1218 | } | |
ee959b00 | 1219 | static FC_DEVICE_ATTR(vport, roles, S_IRUGO, show_fc_vport_roles, NULL); |
a53eb5e0 JS |
1220 | |
1221 | fc_private_vport_rd_enum_attr(vport_type, FC_PORTTYPE_MAX_NAMELEN); | |
1222 | ||
1223 | fc_private_vport_show_function(symbolic_name, "%s\n", | |
1224 | FC_VPORT_SYMBOLIC_NAMELEN + 1, ) | |
1225 | fc_vport_store_str_function(symbolic_name, FC_VPORT_SYMBOLIC_NAMELEN) | |
ee959b00 | 1226 | static FC_DEVICE_ATTR(vport, symbolic_name, S_IRUGO | S_IWUSR, |
a53eb5e0 JS |
1227 | show_fc_vport_symbolic_name, store_fc_vport_symbolic_name); |
1228 | ||
1229 | static ssize_t | |
ee959b00 TJ |
1230 | store_fc_vport_delete(struct device *dev, struct device_attribute *attr, |
1231 | const char *buf, size_t count) | |
a53eb5e0 | 1232 | { |
ee959b00 | 1233 | struct fc_vport *vport = transport_class_to_vport(dev); |
9ef3e4a4 | 1234 | struct Scsi_Host *shost = vport_to_shost(vport); |
a53eb5e0 | 1235 | |
9ef3e4a4 | 1236 | fc_queue_work(shost, &vport->vport_delete_work); |
a53eb5e0 JS |
1237 | return count; |
1238 | } | |
ee959b00 | 1239 | static FC_DEVICE_ATTR(vport, vport_delete, S_IWUSR, |
a53eb5e0 JS |
1240 | NULL, store_fc_vport_delete); |
1241 | ||
1242 | ||
1243 | /* | |
1244 | * Enable/Disable vport | |
1245 | * Write "1" to disable, write "0" to enable | |
1246 | */ | |
1247 | static ssize_t | |
ee959b00 TJ |
1248 | store_fc_vport_disable(struct device *dev, struct device_attribute *attr, |
1249 | const char *buf, | |
a53eb5e0 JS |
1250 | size_t count) |
1251 | { | |
ee959b00 | 1252 | struct fc_vport *vport = transport_class_to_vport(dev); |
a53eb5e0 JS |
1253 | struct Scsi_Host *shost = vport_to_shost(vport); |
1254 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
1255 | int stat; | |
1256 | ||
1257 | if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) | |
1258 | return -EBUSY; | |
1259 | ||
1260 | if (*buf == '0') { | |
1261 | if (vport->vport_state != FC_VPORT_DISABLED) | |
1262 | return -EALREADY; | |
1263 | } else if (*buf == '1') { | |
1264 | if (vport->vport_state == FC_VPORT_DISABLED) | |
1265 | return -EALREADY; | |
1266 | } else | |
1267 | return -EINVAL; | |
1268 | ||
1269 | stat = i->f->vport_disable(vport, ((*buf == '0') ? false : true)); | |
1270 | return stat ? stat : count; | |
1271 | } | |
ee959b00 | 1272 | static FC_DEVICE_ATTR(vport, vport_disable, S_IWUSR, |
a53eb5e0 JS |
1273 | NULL, store_fc_vport_disable); |
1274 | ||
1275 | ||
1da177e4 LT |
1276 | /* |
1277 | * Host Attribute Management | |
1278 | */ | |
1279 | ||
1280 | #define fc_host_show_function(field, format_string, sz, cast) \ | |
1281 | static ssize_t \ | |
ee959b00 TJ |
1282 | show_fc_host_##field (struct device *dev, \ |
1283 | struct device_attribute *attr, char *buf) \ | |
1da177e4 | 1284 | { \ |
ee959b00 | 1285 | struct Scsi_Host *shost = transport_class_to_shost(dev); \ |
1da177e4 LT |
1286 | struct fc_internal *i = to_fc_internal(shost->transportt); \ |
1287 | if (i->f->get_host_##field) \ | |
1288 | i->f->get_host_##field(shost); \ | |
1289 | return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \ | |
1290 | } | |
1291 | ||
1292 | #define fc_host_store_function(field) \ | |
1293 | static ssize_t \ | |
ee959b00 TJ |
1294 | store_fc_host_##field(struct device *dev, \ |
1295 | struct device_attribute *attr, \ | |
1296 | const char *buf, size_t count) \ | |
1da177e4 LT |
1297 | { \ |
1298 | int val; \ | |
ee959b00 | 1299 | struct Scsi_Host *shost = transport_class_to_shost(dev); \ |
1da177e4 | 1300 | struct fc_internal *i = to_fc_internal(shost->transportt); \ |
0f29b966 | 1301 | char *cp; \ |
1da177e4 | 1302 | \ |
0f29b966 JS |
1303 | val = simple_strtoul(buf, &cp, 0); \ |
1304 | if (*cp && (*cp != '\n')) \ | |
1305 | return -EINVAL; \ | |
1da177e4 LT |
1306 | i->f->set_host_##field(shost, val); \ |
1307 | return count; \ | |
1308 | } | |
1309 | ||
b8d08210 JS |
1310 | #define fc_host_store_str_function(field, slen) \ |
1311 | static ssize_t \ | |
ee959b00 TJ |
1312 | store_fc_host_##field(struct device *dev, \ |
1313 | struct device_attribute *attr, \ | |
1314 | const char *buf, size_t count) \ | |
b8d08210 | 1315 | { \ |
ee959b00 | 1316 | struct Scsi_Host *shost = transport_class_to_shost(dev); \ |
b8d08210 JS |
1317 | struct fc_internal *i = to_fc_internal(shost->transportt); \ |
1318 | unsigned int cnt=count; \ | |
1319 | \ | |
1320 | /* count may include a LF at end of string */ \ | |
1321 | if (buf[cnt-1] == '\n') \ | |
1322 | cnt--; \ | |
1323 | if (cnt > ((slen) - 1)) \ | |
1324 | return -EINVAL; \ | |
1325 | memcpy(fc_host_##field(shost), buf, cnt); \ | |
1326 | i->f->set_host_##field(shost); \ | |
1327 | return count; \ | |
1328 | } | |
1329 | ||
1da177e4 LT |
1330 | #define fc_host_rd_attr(field, format_string, sz) \ |
1331 | fc_host_show_function(field, format_string, sz, ) \ | |
ee959b00 | 1332 | static FC_DEVICE_ATTR(host, field, S_IRUGO, \ |
1da177e4 LT |
1333 | show_fc_host_##field, NULL) |
1334 | ||
1335 | #define fc_host_rd_attr_cast(field, format_string, sz, cast) \ | |
1336 | fc_host_show_function(field, format_string, sz, (cast)) \ | |
ee959b00 | 1337 | static FC_DEVICE_ATTR(host, field, S_IRUGO, \ |
1da177e4 LT |
1338 | show_fc_host_##field, NULL) |
1339 | ||
1340 | #define fc_host_rw_attr(field, format_string, sz) \ | |
1341 | fc_host_show_function(field, format_string, sz, ) \ | |
1342 | fc_host_store_function(field) \ | |
ee959b00 | 1343 | static FC_DEVICE_ATTR(host, field, S_IRUGO | S_IWUSR, \ |
1da177e4 LT |
1344 | show_fc_host_##field, \ |
1345 | store_fc_host_##field) | |
1346 | ||
1347 | #define fc_host_rd_enum_attr(title, maxlen) \ | |
1348 | static ssize_t \ | |
ee959b00 TJ |
1349 | show_fc_host_##title (struct device *dev, \ |
1350 | struct device_attribute *attr, char *buf) \ | |
1da177e4 | 1351 | { \ |
ee959b00 | 1352 | struct Scsi_Host *shost = transport_class_to_shost(dev); \ |
1da177e4 LT |
1353 | struct fc_internal *i = to_fc_internal(shost->transportt); \ |
1354 | const char *name; \ | |
1355 | if (i->f->get_host_##title) \ | |
1356 | i->f->get_host_##title(shost); \ | |
1357 | name = get_fc_##title##_name(fc_host_##title(shost)); \ | |
1358 | if (!name) \ | |
1359 | return -EINVAL; \ | |
1360 | return snprintf(buf, maxlen, "%s\n", name); \ | |
1361 | } \ | |
ee959b00 | 1362 | static FC_DEVICE_ATTR(host, title, S_IRUGO, show_fc_host_##title, NULL) |
1da177e4 LT |
1363 | |
1364 | #define SETUP_HOST_ATTRIBUTE_RD(field) \ | |
ee959b00 | 1365 | i->private_host_attrs[count] = device_attr_host_##field; \ |
1da177e4 LT |
1366 | i->private_host_attrs[count].attr.mode = S_IRUGO; \ |
1367 | i->private_host_attrs[count].store = NULL; \ | |
1368 | i->host_attrs[count] = &i->private_host_attrs[count]; \ | |
1369 | if (i->f->show_host_##field) \ | |
1370 | count++ | |
1371 | ||
a53eb5e0 | 1372 | #define SETUP_HOST_ATTRIBUTE_RD_NS(field) \ |
ee959b00 | 1373 | i->private_host_attrs[count] = device_attr_host_##field; \ |
a53eb5e0 JS |
1374 | i->private_host_attrs[count].attr.mode = S_IRUGO; \ |
1375 | i->private_host_attrs[count].store = NULL; \ | |
1376 | i->host_attrs[count] = &i->private_host_attrs[count]; \ | |
1377 | count++ | |
1378 | ||
1da177e4 | 1379 | #define SETUP_HOST_ATTRIBUTE_RW(field) \ |
ee959b00 | 1380 | i->private_host_attrs[count] = device_attr_host_##field; \ |
1da177e4 LT |
1381 | if (!i->f->set_host_##field) { \ |
1382 | i->private_host_attrs[count].attr.mode = S_IRUGO; \ | |
1383 | i->private_host_attrs[count].store = NULL; \ | |
1384 | } \ | |
1385 | i->host_attrs[count] = &i->private_host_attrs[count]; \ | |
1386 | if (i->f->show_host_##field) \ | |
1387 | count++ | |
1388 | ||
1389 | ||
1390 | #define fc_private_host_show_function(field, format_string, sz, cast) \ | |
1391 | static ssize_t \ | |
ee959b00 TJ |
1392 | show_fc_host_##field (struct device *dev, \ |
1393 | struct device_attribute *attr, char *buf) \ | |
1da177e4 | 1394 | { \ |
ee959b00 | 1395 | struct Scsi_Host *shost = transport_class_to_shost(dev); \ |
1da177e4 LT |
1396 | return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \ |
1397 | } | |
1398 | ||
1399 | #define fc_private_host_rd_attr(field, format_string, sz) \ | |
1400 | fc_private_host_show_function(field, format_string, sz, ) \ | |
ee959b00 | 1401 | static FC_DEVICE_ATTR(host, field, S_IRUGO, \ |
1da177e4 LT |
1402 | show_fc_host_##field, NULL) |
1403 | ||
1404 | #define fc_private_host_rd_attr_cast(field, format_string, sz, cast) \ | |
1405 | fc_private_host_show_function(field, format_string, sz, (cast)) \ | |
ee959b00 | 1406 | static FC_DEVICE_ATTR(host, field, S_IRUGO, \ |
1da177e4 LT |
1407 | show_fc_host_##field, NULL) |
1408 | ||
1409 | #define SETUP_PRIVATE_HOST_ATTRIBUTE_RD(field) \ | |
ee959b00 | 1410 | i->private_host_attrs[count] = device_attr_host_##field; \ |
1da177e4 LT |
1411 | i->private_host_attrs[count].attr.mode = S_IRUGO; \ |
1412 | i->private_host_attrs[count].store = NULL; \ | |
1413 | i->host_attrs[count] = &i->private_host_attrs[count]; \ | |
1414 | count++ | |
1415 | ||
1416 | #define SETUP_PRIVATE_HOST_ATTRIBUTE_RW(field) \ | |
91ca7b01 | 1417 | { \ |
ee959b00 | 1418 | i->private_host_attrs[count] = device_attr_host_##field; \ |
1da177e4 | 1419 | i->host_attrs[count] = &i->private_host_attrs[count]; \ |
91ca7b01 AV |
1420 | count++; \ |
1421 | } | |
1da177e4 LT |
1422 | |
1423 | ||
1424 | /* Fixed Host Attributes */ | |
1425 | ||
1426 | static ssize_t | |
ee959b00 TJ |
1427 | show_fc_host_supported_classes (struct device *dev, |
1428 | struct device_attribute *attr, char *buf) | |
1da177e4 | 1429 | { |
ee959b00 | 1430 | struct Scsi_Host *shost = transport_class_to_shost(dev); |
1da177e4 LT |
1431 | |
1432 | if (fc_host_supported_classes(shost) == FC_COS_UNSPECIFIED) | |
1433 | return snprintf(buf, 20, "unspecified\n"); | |
1434 | ||
1435 | return get_fc_cos_names(fc_host_supported_classes(shost), buf); | |
1436 | } | |
ee959b00 | 1437 | static FC_DEVICE_ATTR(host, supported_classes, S_IRUGO, |
1da177e4 LT |
1438 | show_fc_host_supported_classes, NULL); |
1439 | ||
1440 | static ssize_t | |
ee959b00 TJ |
1441 | show_fc_host_supported_fc4s (struct device *dev, |
1442 | struct device_attribute *attr, char *buf) | |
1da177e4 | 1443 | { |
ee959b00 | 1444 | struct Scsi_Host *shost = transport_class_to_shost(dev); |
1da177e4 LT |
1445 | return (ssize_t)show_fc_fc4s(buf, fc_host_supported_fc4s(shost)); |
1446 | } | |
ee959b00 | 1447 | static FC_DEVICE_ATTR(host, supported_fc4s, S_IRUGO, |
1da177e4 LT |
1448 | show_fc_host_supported_fc4s, NULL); |
1449 | ||
1450 | static ssize_t | |
ee959b00 TJ |
1451 | show_fc_host_supported_speeds (struct device *dev, |
1452 | struct device_attribute *attr, char *buf) | |
1da177e4 | 1453 | { |
ee959b00 | 1454 | struct Scsi_Host *shost = transport_class_to_shost(dev); |
1da177e4 LT |
1455 | |
1456 | if (fc_host_supported_speeds(shost) == FC_PORTSPEED_UNKNOWN) | |
1457 | return snprintf(buf, 20, "unknown\n"); | |
1458 | ||
1459 | return get_fc_port_speed_names(fc_host_supported_speeds(shost), buf); | |
1460 | } | |
ee959b00 | 1461 | static FC_DEVICE_ATTR(host, supported_speeds, S_IRUGO, |
1da177e4 LT |
1462 | show_fc_host_supported_speeds, NULL); |
1463 | ||
1464 | ||
1465 | fc_private_host_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); | |
1466 | fc_private_host_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); | |
6b7281d0 AH |
1467 | fc_private_host_rd_attr_cast(permanent_port_name, "0x%llx\n", 20, |
1468 | unsigned long long); | |
1da177e4 | 1469 | fc_private_host_rd_attr(maxframe_size, "%u bytes\n", 20); |
a53eb5e0 | 1470 | fc_private_host_rd_attr(max_npiv_vports, "%u\n", 20); |
1da177e4 LT |
1471 | fc_private_host_rd_attr(serial_number, "%s\n", (FC_SERIAL_NUMBER_SIZE +1)); |
1472 | ||
1473 | ||
1474 | /* Dynamic Host Attributes */ | |
1475 | ||
1476 | static ssize_t | |
ee959b00 TJ |
1477 | show_fc_host_active_fc4s (struct device *dev, |
1478 | struct device_attribute *attr, char *buf) | |
1da177e4 | 1479 | { |
ee959b00 | 1480 | struct Scsi_Host *shost = transport_class_to_shost(dev); |
1da177e4 LT |
1481 | struct fc_internal *i = to_fc_internal(shost->transportt); |
1482 | ||
1483 | if (i->f->get_host_active_fc4s) | |
1484 | i->f->get_host_active_fc4s(shost); | |
1485 | ||
1486 | return (ssize_t)show_fc_fc4s(buf, fc_host_active_fc4s(shost)); | |
1487 | } | |
ee959b00 | 1488 | static FC_DEVICE_ATTR(host, active_fc4s, S_IRUGO, |
1da177e4 LT |
1489 | show_fc_host_active_fc4s, NULL); |
1490 | ||
1491 | static ssize_t | |
ee959b00 TJ |
1492 | show_fc_host_speed (struct device *dev, |
1493 | struct device_attribute *attr, char *buf) | |
1da177e4 | 1494 | { |
ee959b00 | 1495 | struct Scsi_Host *shost = transport_class_to_shost(dev); |
1da177e4 LT |
1496 | struct fc_internal *i = to_fc_internal(shost->transportt); |
1497 | ||
1498 | if (i->f->get_host_speed) | |
1499 | i->f->get_host_speed(shost); | |
1500 | ||
1501 | if (fc_host_speed(shost) == FC_PORTSPEED_UNKNOWN) | |
1502 | return snprintf(buf, 20, "unknown\n"); | |
1503 | ||
1504 | return get_fc_port_speed_names(fc_host_speed(shost), buf); | |
1505 | } | |
ee959b00 | 1506 | static FC_DEVICE_ATTR(host, speed, S_IRUGO, |
1da177e4 LT |
1507 | show_fc_host_speed, NULL); |
1508 | ||
1509 | ||
1510 | fc_host_rd_attr(port_id, "0x%06x\n", 20); | |
1511 | fc_host_rd_enum_attr(port_type, FC_PORTTYPE_MAX_NAMELEN); | |
1512 | fc_host_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN); | |
1513 | fc_host_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long); | |
016131b8 | 1514 | fc_host_rd_attr(symbolic_name, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1); |
1da177e4 | 1515 | |
b8d08210 JS |
1516 | fc_private_host_show_function(system_hostname, "%s\n", |
1517 | FC_SYMBOLIC_NAME_SIZE + 1, ) | |
1518 | fc_host_store_str_function(system_hostname, FC_SYMBOLIC_NAME_SIZE) | |
ee959b00 | 1519 | static FC_DEVICE_ATTR(host, system_hostname, S_IRUGO | S_IWUSR, |
b8d08210 JS |
1520 | show_fc_host_system_hostname, store_fc_host_system_hostname); |
1521 | ||
1da177e4 LT |
1522 | |
1523 | /* Private Host Attributes */ | |
1524 | ||
1525 | static ssize_t | |
ee959b00 TJ |
1526 | show_fc_private_host_tgtid_bind_type(struct device *dev, |
1527 | struct device_attribute *attr, char *buf) | |
1da177e4 | 1528 | { |
ee959b00 | 1529 | struct Scsi_Host *shost = transport_class_to_shost(dev); |
1da177e4 LT |
1530 | const char *name; |
1531 | ||
1532 | name = get_fc_tgtid_bind_type_name(fc_host_tgtid_bind_type(shost)); | |
1533 | if (!name) | |
1534 | return -EINVAL; | |
1535 | return snprintf(buf, FC_BINDTYPE_MAX_NAMELEN, "%s\n", name); | |
1536 | } | |
1537 | ||
d16794f6 JSEC |
1538 | #define get_list_head_entry(pos, head, member) \ |
1539 | pos = list_entry((head)->next, typeof(*pos), member) | |
1540 | ||
1da177e4 | 1541 | static ssize_t |
ee959b00 TJ |
1542 | store_fc_private_host_tgtid_bind_type(struct device *dev, |
1543 | struct device_attribute *attr, const char *buf, size_t count) | |
1da177e4 | 1544 | { |
ee959b00 | 1545 | struct Scsi_Host *shost = transport_class_to_shost(dev); |
d16794f6 | 1546 | struct fc_rport *rport; |
1da177e4 LT |
1547 | enum fc_tgtid_binding_type val; |
1548 | unsigned long flags; | |
1549 | ||
1550 | if (get_fc_tgtid_bind_type_match(buf, &val)) | |
1551 | return -EINVAL; | |
1552 | ||
1553 | /* if changing bind type, purge all unused consistent bindings */ | |
1554 | if (val != fc_host_tgtid_bind_type(shost)) { | |
1555 | spin_lock_irqsave(shost->host_lock, flags); | |
d16794f6 JSEC |
1556 | while (!list_empty(&fc_host_rport_bindings(shost))) { |
1557 | get_list_head_entry(rport, | |
1558 | &fc_host_rport_bindings(shost), peers); | |
aedf3497 JS |
1559 | list_del(&rport->peers); |
1560 | rport->port_state = FC_PORTSTATE_DELETED; | |
1561 | fc_queue_work(shost, &rport->rport_delete_work); | |
d16794f6 | 1562 | } |
1da177e4 LT |
1563 | spin_unlock_irqrestore(shost->host_lock, flags); |
1564 | } | |
1565 | ||
1566 | fc_host_tgtid_bind_type(shost) = val; | |
1567 | return count; | |
1568 | } | |
1569 | ||
ee959b00 | 1570 | static FC_DEVICE_ATTR(host, tgtid_bind_type, S_IRUGO | S_IWUSR, |
1da177e4 LT |
1571 | show_fc_private_host_tgtid_bind_type, |
1572 | store_fc_private_host_tgtid_bind_type); | |
1573 | ||
91ca7b01 | 1574 | static ssize_t |
ee959b00 TJ |
1575 | store_fc_private_host_issue_lip(struct device *dev, |
1576 | struct device_attribute *attr, const char *buf, size_t count) | |
91ca7b01 | 1577 | { |
ee959b00 | 1578 | struct Scsi_Host *shost = transport_class_to_shost(dev); |
91ca7b01 AV |
1579 | struct fc_internal *i = to_fc_internal(shost->transportt); |
1580 | int ret; | |
1581 | ||
1582 | /* ignore any data value written to the attribute */ | |
1583 | if (i->f->issue_fc_host_lip) { | |
1584 | ret = i->f->issue_fc_host_lip(shost); | |
1585 | return ret ? ret: count; | |
1586 | } | |
1587 | ||
1588 | return -ENOENT; | |
1589 | } | |
1590 | ||
ee959b00 | 1591 | static FC_DEVICE_ATTR(host, issue_lip, S_IWUSR, NULL, |
91ca7b01 AV |
1592 | store_fc_private_host_issue_lip); |
1593 | ||
a53eb5e0 JS |
1594 | fc_private_host_rd_attr(npiv_vports_inuse, "%u\n", 20); |
1595 | ||
1596 | ||
1da177e4 LT |
1597 | /* |
1598 | * Host Statistics Management | |
1599 | */ | |
1600 | ||
1601 | /* Show a given an attribute in the statistics group */ | |
1602 | static ssize_t | |
ee959b00 | 1603 | fc_stat_show(const struct device *dev, char *buf, unsigned long offset) |
1da177e4 | 1604 | { |
ee959b00 | 1605 | struct Scsi_Host *shost = transport_class_to_shost(dev); |
1da177e4 LT |
1606 | struct fc_internal *i = to_fc_internal(shost->transportt); |
1607 | struct fc_host_statistics *stats; | |
1608 | ssize_t ret = -ENOENT; | |
1609 | ||
1610 | if (offset > sizeof(struct fc_host_statistics) || | |
1611 | offset % sizeof(u64) != 0) | |
1612 | WARN_ON(1); | |
1613 | ||
1614 | if (i->f->get_fc_host_stats) { | |
1615 | stats = (i->f->get_fc_host_stats)(shost); | |
1616 | if (stats) | |
1617 | ret = snprintf(buf, 20, "0x%llx\n", | |
1618 | (unsigned long long)*(u64 *)(((u8 *) stats) + offset)); | |
1619 | } | |
1620 | return ret; | |
1621 | } | |
1622 | ||
1623 | ||
1624 | /* generate a read-only statistics attribute */ | |
1625 | #define fc_host_statistic(name) \ | |
ee959b00 TJ |
1626 | static ssize_t show_fcstat_##name(struct device *cd, \ |
1627 | struct device_attribute *attr, \ | |
1628 | char *buf) \ | |
1da177e4 LT |
1629 | { \ |
1630 | return fc_stat_show(cd, buf, \ | |
1631 | offsetof(struct fc_host_statistics, name)); \ | |
1632 | } \ | |
ee959b00 | 1633 | static FC_DEVICE_ATTR(host, name, S_IRUGO, show_fcstat_##name, NULL) |
1da177e4 LT |
1634 | |
1635 | fc_host_statistic(seconds_since_last_reset); | |
1636 | fc_host_statistic(tx_frames); | |
1637 | fc_host_statistic(tx_words); | |
1638 | fc_host_statistic(rx_frames); | |
1639 | fc_host_statistic(rx_words); | |
1640 | fc_host_statistic(lip_count); | |
1641 | fc_host_statistic(nos_count); | |
1642 | fc_host_statistic(error_frames); | |
1643 | fc_host_statistic(dumped_frames); | |
1644 | fc_host_statistic(link_failure_count); | |
1645 | fc_host_statistic(loss_of_sync_count); | |
1646 | fc_host_statistic(loss_of_signal_count); | |
1647 | fc_host_statistic(prim_seq_protocol_err_count); | |
1648 | fc_host_statistic(invalid_tx_word_count); | |
1649 | fc_host_statistic(invalid_crc_count); | |
1650 | fc_host_statistic(fcp_input_requests); | |
1651 | fc_host_statistic(fcp_output_requests); | |
1652 | fc_host_statistic(fcp_control_requests); | |
1653 | fc_host_statistic(fcp_input_megabytes); | |
1654 | fc_host_statistic(fcp_output_megabytes); | |
1655 | ||
1656 | static ssize_t | |
ee959b00 TJ |
1657 | fc_reset_statistics(struct device *dev, struct device_attribute *attr, |
1658 | const char *buf, size_t count) | |
1da177e4 | 1659 | { |
ee959b00 | 1660 | struct Scsi_Host *shost = transport_class_to_shost(dev); |
1da177e4 LT |
1661 | struct fc_internal *i = to_fc_internal(shost->transportt); |
1662 | ||
1663 | /* ignore any data value written to the attribute */ | |
1664 | if (i->f->reset_fc_host_stats) { | |
1665 | i->f->reset_fc_host_stats(shost); | |
1666 | return count; | |
1667 | } | |
1668 | ||
1669 | return -ENOENT; | |
1670 | } | |
ee959b00 | 1671 | static FC_DEVICE_ATTR(host, reset_statistics, S_IWUSR, NULL, |
1da177e4 LT |
1672 | fc_reset_statistics); |
1673 | ||
1da177e4 | 1674 | static struct attribute *fc_statistics_attrs[] = { |
ee959b00 TJ |
1675 | &device_attr_host_seconds_since_last_reset.attr, |
1676 | &device_attr_host_tx_frames.attr, | |
1677 | &device_attr_host_tx_words.attr, | |
1678 | &device_attr_host_rx_frames.attr, | |
1679 | &device_attr_host_rx_words.attr, | |
1680 | &device_attr_host_lip_count.attr, | |
1681 | &device_attr_host_nos_count.attr, | |
1682 | &device_attr_host_error_frames.attr, | |
1683 | &device_attr_host_dumped_frames.attr, | |
1684 | &device_attr_host_link_failure_count.attr, | |
1685 | &device_attr_host_loss_of_sync_count.attr, | |
1686 | &device_attr_host_loss_of_signal_count.attr, | |
1687 | &device_attr_host_prim_seq_protocol_err_count.attr, | |
1688 | &device_attr_host_invalid_tx_word_count.attr, | |
1689 | &device_attr_host_invalid_crc_count.attr, | |
1690 | &device_attr_host_fcp_input_requests.attr, | |
1691 | &device_attr_host_fcp_output_requests.attr, | |
1692 | &device_attr_host_fcp_control_requests.attr, | |
1693 | &device_attr_host_fcp_input_megabytes.attr, | |
1694 | &device_attr_host_fcp_output_megabytes.attr, | |
1695 | &device_attr_host_reset_statistics.attr, | |
1da177e4 LT |
1696 | NULL |
1697 | }; | |
1698 | ||
1699 | static struct attribute_group fc_statistics_group = { | |
1700 | .name = "statistics", | |
1701 | .attrs = fc_statistics_attrs, | |
1702 | }; | |
1703 | ||
a53eb5e0 JS |
1704 | |
1705 | /* Host Vport Attributes */ | |
1706 | ||
1707 | static int | |
1708 | fc_parse_wwn(const char *ns, u64 *nm) | |
1709 | { | |
1710 | unsigned int i, j; | |
1711 | u8 wwn[8]; | |
1712 | ||
1713 | memset(wwn, 0, sizeof(wwn)); | |
1714 | ||
1715 | /* Validate and store the new name */ | |
1716 | for (i=0, j=0; i < 16; i++) { | |
1717 | if ((*ns >= 'a') && (*ns <= 'f')) | |
1718 | j = ((j << 4) | ((*ns++ -'a') + 10)); | |
1719 | else if ((*ns >= 'A') && (*ns <= 'F')) | |
1720 | j = ((j << 4) | ((*ns++ -'A') + 10)); | |
1721 | else if ((*ns >= '0') && (*ns <= '9')) | |
1722 | j = ((j << 4) | (*ns++ -'0')); | |
1723 | else | |
1724 | return -EINVAL; | |
1725 | if (i % 2) { | |
1726 | wwn[i/2] = j & 0xff; | |
1727 | j = 0; | |
1728 | } | |
1729 | } | |
1730 | ||
1731 | *nm = wwn_to_u64(wwn); | |
1732 | ||
1733 | return 0; | |
1734 | } | |
1735 | ||
1736 | ||
1737 | /* | |
1738 | * "Short-cut" sysfs variable to create a new vport on a FC Host. | |
1739 | * Input is a string of the form "<WWPN>:<WWNN>". Other attributes | |
1740 | * will default to a NPIV-based FCP_Initiator; The WWNs are specified | |
1741 | * as hex characters, and may *not* contain any prefixes (e.g. 0x, x, etc) | |
1742 | */ | |
1743 | static ssize_t | |
ee959b00 TJ |
1744 | store_fc_host_vport_create(struct device *dev, struct device_attribute *attr, |
1745 | const char *buf, size_t count) | |
a53eb5e0 | 1746 | { |
ee959b00 | 1747 | struct Scsi_Host *shost = transport_class_to_shost(dev); |
a53eb5e0 JS |
1748 | struct fc_vport_identifiers vid; |
1749 | struct fc_vport *vport; | |
1750 | unsigned int cnt=count; | |
1751 | int stat; | |
1752 | ||
1753 | memset(&vid, 0, sizeof(vid)); | |
1754 | ||
1755 | /* count may include a LF at end of string */ | |
1756 | if (buf[cnt-1] == '\n') | |
1757 | cnt--; | |
1758 | ||
1759 | /* validate we have enough characters for WWPN */ | |
1760 | if ((cnt != (16+1+16)) || (buf[16] != ':')) | |
1761 | return -EINVAL; | |
1762 | ||
1763 | stat = fc_parse_wwn(&buf[0], &vid.port_name); | |
1764 | if (stat) | |
1765 | return stat; | |
1766 | ||
1767 | stat = fc_parse_wwn(&buf[17], &vid.node_name); | |
1768 | if (stat) | |
1769 | return stat; | |
1770 | ||
1771 | vid.roles = FC_PORT_ROLE_FCP_INITIATOR; | |
1772 | vid.vport_type = FC_PORTTYPE_NPIV; | |
1773 | /* vid.symbolic_name is already zero/NULL's */ | |
1774 | vid.disable = false; /* always enabled */ | |
1775 | ||
1776 | /* we only allow support on Channel 0 !!! */ | |
a30c3f69 | 1777 | stat = fc_vport_setup(shost, 0, &shost->shost_gendev, &vid, &vport); |
a53eb5e0 JS |
1778 | return stat ? stat : count; |
1779 | } | |
ee959b00 | 1780 | static FC_DEVICE_ATTR(host, vport_create, S_IWUSR, NULL, |
a53eb5e0 JS |
1781 | store_fc_host_vport_create); |
1782 | ||
1783 | ||
1784 | /* | |
1785 | * "Short-cut" sysfs variable to delete a vport on a FC Host. | |
1786 | * Vport is identified by a string containing "<WWPN>:<WWNN>". | |
1787 | * The WWNs are specified as hex characters, and may *not* contain | |
1788 | * any prefixes (e.g. 0x, x, etc) | |
1789 | */ | |
1790 | static ssize_t | |
ee959b00 TJ |
1791 | store_fc_host_vport_delete(struct device *dev, struct device_attribute *attr, |
1792 | const char *buf, size_t count) | |
a53eb5e0 | 1793 | { |
ee959b00 | 1794 | struct Scsi_Host *shost = transport_class_to_shost(dev); |
a53eb5e0 JS |
1795 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
1796 | struct fc_vport *vport; | |
1797 | u64 wwpn, wwnn; | |
1798 | unsigned long flags; | |
1799 | unsigned int cnt=count; | |
1800 | int stat, match; | |
1801 | ||
1802 | /* count may include a LF at end of string */ | |
1803 | if (buf[cnt-1] == '\n') | |
1804 | cnt--; | |
1805 | ||
1806 | /* validate we have enough characters for WWPN */ | |
1807 | if ((cnt != (16+1+16)) || (buf[16] != ':')) | |
1808 | return -EINVAL; | |
1809 | ||
1810 | stat = fc_parse_wwn(&buf[0], &wwpn); | |
1811 | if (stat) | |
1812 | return stat; | |
1813 | ||
1814 | stat = fc_parse_wwn(&buf[17], &wwnn); | |
1815 | if (stat) | |
1816 | return stat; | |
1817 | ||
1818 | spin_lock_irqsave(shost->host_lock, flags); | |
1819 | match = 0; | |
1820 | /* we only allow support on Channel 0 !!! */ | |
1821 | list_for_each_entry(vport, &fc_host->vports, peers) { | |
1822 | if ((vport->channel == 0) && | |
1823 | (vport->port_name == wwpn) && (vport->node_name == wwnn)) { | |
1824 | match = 1; | |
1825 | break; | |
1826 | } | |
1827 | } | |
1828 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1829 | ||
1830 | if (!match) | |
1831 | return -ENODEV; | |
1832 | ||
1833 | stat = fc_vport_terminate(vport); | |
1834 | return stat ? stat : count; | |
1835 | } | |
ee959b00 | 1836 | static FC_DEVICE_ATTR(host, vport_delete, S_IWUSR, NULL, |
a53eb5e0 JS |
1837 | store_fc_host_vport_delete); |
1838 | ||
1839 | ||
1da177e4 LT |
1840 | static int fc_host_match(struct attribute_container *cont, |
1841 | struct device *dev) | |
1842 | { | |
1843 | struct Scsi_Host *shost; | |
1844 | struct fc_internal *i; | |
1845 | ||
1846 | if (!scsi_is_host_device(dev)) | |
1847 | return 0; | |
1848 | ||
1849 | shost = dev_to_shost(dev); | |
1850 | if (!shost->transportt || shost->transportt->host_attrs.ac.class | |
1851 | != &fc_host_class.class) | |
1852 | return 0; | |
1853 | ||
1854 | i = to_fc_internal(shost->transportt); | |
1855 | ||
1856 | return &i->t.host_attrs.ac == cont; | |
1857 | } | |
1858 | ||
1859 | static int fc_target_match(struct attribute_container *cont, | |
1860 | struct device *dev) | |
1861 | { | |
1862 | struct Scsi_Host *shost; | |
1863 | struct fc_internal *i; | |
1864 | ||
1865 | if (!scsi_is_target_device(dev)) | |
1866 | return 0; | |
1867 | ||
1868 | shost = dev_to_shost(dev->parent); | |
1869 | if (!shost->transportt || shost->transportt->host_attrs.ac.class | |
1870 | != &fc_host_class.class) | |
1871 | return 0; | |
1872 | ||
1873 | i = to_fc_internal(shost->transportt); | |
1874 | ||
1875 | return &i->t.target_attrs.ac == cont; | |
1876 | } | |
1877 | ||
1878 | static void fc_rport_dev_release(struct device *dev) | |
1879 | { | |
1880 | struct fc_rport *rport = dev_to_rport(dev); | |
1881 | put_device(dev->parent); | |
1882 | kfree(rport); | |
1883 | } | |
1884 | ||
1885 | int scsi_is_fc_rport(const struct device *dev) | |
1886 | { | |
1887 | return dev->release == fc_rport_dev_release; | |
1888 | } | |
1889 | EXPORT_SYMBOL(scsi_is_fc_rport); | |
1890 | ||
1891 | static int fc_rport_match(struct attribute_container *cont, | |
1892 | struct device *dev) | |
1893 | { | |
1894 | struct Scsi_Host *shost; | |
1895 | struct fc_internal *i; | |
1896 | ||
1897 | if (!scsi_is_fc_rport(dev)) | |
1898 | return 0; | |
1899 | ||
1900 | shost = dev_to_shost(dev->parent); | |
1901 | if (!shost->transportt || shost->transportt->host_attrs.ac.class | |
1902 | != &fc_host_class.class) | |
1903 | return 0; | |
1904 | ||
1905 | i = to_fc_internal(shost->transportt); | |
1906 | ||
1907 | return &i->rport_attr_cont.ac == cont; | |
1908 | } | |
1909 | ||
5c44cd2a | 1910 | |
a53eb5e0 JS |
1911 | static void fc_vport_dev_release(struct device *dev) |
1912 | { | |
1913 | struct fc_vport *vport = dev_to_vport(dev); | |
1914 | put_device(dev->parent); /* release kobj parent */ | |
1915 | kfree(vport); | |
1916 | } | |
1917 | ||
1918 | int scsi_is_fc_vport(const struct device *dev) | |
1919 | { | |
1920 | return dev->release == fc_vport_dev_release; | |
1921 | } | |
1922 | EXPORT_SYMBOL(scsi_is_fc_vport); | |
1923 | ||
1924 | static int fc_vport_match(struct attribute_container *cont, | |
1925 | struct device *dev) | |
1926 | { | |
1927 | struct fc_vport *vport; | |
1928 | struct Scsi_Host *shost; | |
1929 | struct fc_internal *i; | |
1930 | ||
1931 | if (!scsi_is_fc_vport(dev)) | |
1932 | return 0; | |
1933 | vport = dev_to_vport(dev); | |
1934 | ||
1935 | shost = vport_to_shost(vport); | |
1936 | if (!shost->transportt || shost->transportt->host_attrs.ac.class | |
1937 | != &fc_host_class.class) | |
1938 | return 0; | |
1939 | ||
1940 | i = to_fc_internal(shost->transportt); | |
1941 | return &i->vport_attr_cont.ac == cont; | |
1942 | } | |
1943 | ||
1944 | ||
c829c394 JS |
1945 | /** |
1946 | * fc_timed_out - FC Transport I/O timeout intercept handler | |
c829c394 JS |
1947 | * @scmd: The SCSI command which timed out |
1948 | * | |
1949 | * This routine protects against error handlers getting invoked while a | |
1950 | * rport is in a blocked state, typically due to a temporarily loss of | |
1951 | * connectivity. If the error handlers are allowed to proceed, requests | |
1952 | * to abort i/o, reset the target, etc will likely fail as there is no way | |
1953 | * to communicate with the device to perform the requested function. These | |
1954 | * failures may result in the midlayer taking the device offline, requiring | |
1955 | * manual intervention to restore operation. | |
1956 | * | |
1957 | * This routine, called whenever an i/o times out, validates the state of | |
1958 | * the underlying rport. If the rport is blocked, it returns | |
1959 | * EH_RESET_TIMER, which will continue to reschedule the timeout. | |
1960 | * Eventually, either the device will return, or devloss_tmo will fire, | |
1961 | * and when the timeout then fires, it will be handled normally. | |
1962 | * If the rport is not blocked, normal error handling continues. | |
1963 | * | |
1964 | * Notes: | |
1965 | * This routine assumes no locks are held on entry. | |
eb44820c | 1966 | */ |
242f9dcb | 1967 | static enum blk_eh_timer_return |
c829c394 JS |
1968 | fc_timed_out(struct scsi_cmnd *scmd) |
1969 | { | |
1970 | struct fc_rport *rport = starget_to_rport(scsi_target(scmd->device)); | |
1971 | ||
1972 | if (rport->port_state == FC_PORTSTATE_BLOCKED) | |
242f9dcb | 1973 | return BLK_EH_RESET_TIMER; |
c829c394 | 1974 | |
242f9dcb | 1975 | return BLK_EH_NOT_HANDLED; |
c829c394 JS |
1976 | } |
1977 | ||
5c44cd2a | 1978 | /* |
bda23253 JS |
1979 | * Called by fc_user_scan to locate an rport on the shost that |
1980 | * matches the channel and target id, and invoke scsi_scan_target() | |
1981 | * on the rport. | |
5c44cd2a | 1982 | */ |
bda23253 JS |
1983 | static void |
1984 | fc_user_scan_tgt(struct Scsi_Host *shost, uint channel, uint id, uint lun) | |
5c44cd2a JSEC |
1985 | { |
1986 | struct fc_rport *rport; | |
bda23253 JS |
1987 | unsigned long flags; |
1988 | ||
1989 | spin_lock_irqsave(shost->host_lock, flags); | |
5c44cd2a | 1990 | |
e02f3f59 CH |
1991 | list_for_each_entry(rport, &fc_host_rports(shost), peers) { |
1992 | if (rport->scsi_target_id == -1) | |
1993 | continue; | |
5c44cd2a | 1994 | |
0d2fcd9f HR |
1995 | if (rport->port_state != FC_PORTSTATE_ONLINE) |
1996 | continue; | |
1997 | ||
bda23253 JS |
1998 | if ((channel == rport->channel) && |
1999 | (id == rport->scsi_target_id)) { | |
2000 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2001 | scsi_scan_target(&rport->dev, channel, id, lun, 1); | |
2002 | return; | |
e02f3f59 CH |
2003 | } |
2004 | } | |
2005 | ||
bda23253 JS |
2006 | spin_unlock_irqrestore(shost->host_lock, flags); |
2007 | } | |
2008 | ||
2009 | /* | |
2010 | * Called via sysfs scan routines. Necessary, as the FC transport | |
2011 | * wants to place all target objects below the rport object. So this | |
2012 | * routine must invoke the scsi_scan_target() routine with the rport | |
2013 | * object as the parent. | |
2014 | */ | |
2015 | static int | |
2016 | fc_user_scan(struct Scsi_Host *shost, uint channel, uint id, uint lun) | |
2017 | { | |
2018 | uint chlo, chhi; | |
2019 | uint tgtlo, tgthi; | |
2020 | ||
2021 | if (((channel != SCAN_WILD_CARD) && (channel > shost->max_channel)) || | |
2022 | ((id != SCAN_WILD_CARD) && (id >= shost->max_id)) || | |
2023 | ((lun != SCAN_WILD_CARD) && (lun > shost->max_lun))) | |
2024 | return -EINVAL; | |
2025 | ||
2026 | if (channel == SCAN_WILD_CARD) { | |
2027 | chlo = 0; | |
2028 | chhi = shost->max_channel + 1; | |
2029 | } else { | |
2030 | chlo = channel; | |
2031 | chhi = channel + 1; | |
2032 | } | |
2033 | ||
2034 | if (id == SCAN_WILD_CARD) { | |
2035 | tgtlo = 0; | |
2036 | tgthi = shost->max_id; | |
2037 | } else { | |
2038 | tgtlo = id; | |
2039 | tgthi = id + 1; | |
2040 | } | |
2041 | ||
2042 | for ( ; chlo < chhi; chlo++) | |
2043 | for ( ; tgtlo < tgthi; tgtlo++) | |
2044 | fc_user_scan_tgt(shost, chlo, tgtlo, lun); | |
2045 | ||
e02f3f59 | 2046 | return 0; |
5c44cd2a JSEC |
2047 | } |
2048 | ||
7525236d FT |
2049 | static int fc_tsk_mgmt_response(struct Scsi_Host *shost, u64 nexus, u64 tm_id, |
2050 | int result) | |
2051 | { | |
2052 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
2053 | return i->f->tsk_mgmt_response(shost, nexus, tm_id, result); | |
2054 | } | |
2055 | ||
2056 | static int fc_it_nexus_response(struct Scsi_Host *shost, u64 nexus, int result) | |
2057 | { | |
2058 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
2059 | return i->f->it_nexus_response(shost, nexus, result); | |
2060 | } | |
2061 | ||
1da177e4 LT |
2062 | struct scsi_transport_template * |
2063 | fc_attach_transport(struct fc_function_template *ft) | |
2064 | { | |
1da177e4 | 2065 | int count; |
24669f75 JS |
2066 | struct fc_internal *i = kzalloc(sizeof(struct fc_internal), |
2067 | GFP_KERNEL); | |
1da177e4 LT |
2068 | |
2069 | if (unlikely(!i)) | |
2070 | return NULL; | |
2071 | ||
1da177e4 LT |
2072 | i->t.target_attrs.ac.attrs = &i->starget_attrs[0]; |
2073 | i->t.target_attrs.ac.class = &fc_transport_class.class; | |
2074 | i->t.target_attrs.ac.match = fc_target_match; | |
2075 | i->t.target_size = sizeof(struct fc_starget_attrs); | |
2076 | transport_container_register(&i->t.target_attrs); | |
2077 | ||
2078 | i->t.host_attrs.ac.attrs = &i->host_attrs[0]; | |
2079 | i->t.host_attrs.ac.class = &fc_host_class.class; | |
2080 | i->t.host_attrs.ac.match = fc_host_match; | |
2081 | i->t.host_size = sizeof(struct fc_host_attrs); | |
2082 | if (ft->get_fc_host_stats) | |
2083 | i->t.host_attrs.statistics = &fc_statistics_group; | |
2084 | transport_container_register(&i->t.host_attrs); | |
2085 | ||
2086 | i->rport_attr_cont.ac.attrs = &i->rport_attrs[0]; | |
2087 | i->rport_attr_cont.ac.class = &fc_rport_class.class; | |
2088 | i->rport_attr_cont.ac.match = fc_rport_match; | |
2089 | transport_container_register(&i->rport_attr_cont); | |
2090 | ||
a53eb5e0 JS |
2091 | i->vport_attr_cont.ac.attrs = &i->vport_attrs[0]; |
2092 | i->vport_attr_cont.ac.class = &fc_vport_class.class; | |
2093 | i->vport_attr_cont.ac.match = fc_vport_match; | |
2094 | transport_container_register(&i->vport_attr_cont); | |
2095 | ||
1da177e4 LT |
2096 | i->f = ft; |
2097 | ||
2098 | /* Transport uses the shost workq for scsi scanning */ | |
2099 | i->t.create_work_queue = 1; | |
5c44cd2a | 2100 | |
c829c394 JS |
2101 | i->t.eh_timed_out = fc_timed_out; |
2102 | ||
e02f3f59 | 2103 | i->t.user_scan = fc_user_scan; |
9ef3e4a4 | 2104 | |
7525236d FT |
2105 | /* target-mode drivers' functions */ |
2106 | i->t.tsk_mgmt_response = fc_tsk_mgmt_response; | |
2107 | i->t.it_nexus_response = fc_it_nexus_response; | |
2108 | ||
1da177e4 LT |
2109 | /* |
2110 | * Setup SCSI Target Attributes. | |
2111 | */ | |
2112 | count = 0; | |
2113 | SETUP_STARGET_ATTRIBUTE_RD(node_name); | |
2114 | SETUP_STARGET_ATTRIBUTE_RD(port_name); | |
2115 | SETUP_STARGET_ATTRIBUTE_RD(port_id); | |
2116 | ||
2117 | BUG_ON(count > FC_STARGET_NUM_ATTRS); | |
2118 | ||
2119 | i->starget_attrs[count] = NULL; | |
2120 | ||
2121 | ||
2122 | /* | |
2123 | * Setup SCSI Host Attributes. | |
2124 | */ | |
2125 | count=0; | |
2126 | SETUP_HOST_ATTRIBUTE_RD(node_name); | |
2127 | SETUP_HOST_ATTRIBUTE_RD(port_name); | |
6b7281d0 | 2128 | SETUP_HOST_ATTRIBUTE_RD(permanent_port_name); |
1da177e4 LT |
2129 | SETUP_HOST_ATTRIBUTE_RD(supported_classes); |
2130 | SETUP_HOST_ATTRIBUTE_RD(supported_fc4s); | |
1da177e4 LT |
2131 | SETUP_HOST_ATTRIBUTE_RD(supported_speeds); |
2132 | SETUP_HOST_ATTRIBUTE_RD(maxframe_size); | |
a53eb5e0 JS |
2133 | if (ft->vport_create) { |
2134 | SETUP_HOST_ATTRIBUTE_RD_NS(max_npiv_vports); | |
2135 | SETUP_HOST_ATTRIBUTE_RD_NS(npiv_vports_inuse); | |
2136 | } | |
1da177e4 LT |
2137 | SETUP_HOST_ATTRIBUTE_RD(serial_number); |
2138 | ||
2139 | SETUP_HOST_ATTRIBUTE_RD(port_id); | |
2140 | SETUP_HOST_ATTRIBUTE_RD(port_type); | |
2141 | SETUP_HOST_ATTRIBUTE_RD(port_state); | |
2142 | SETUP_HOST_ATTRIBUTE_RD(active_fc4s); | |
2143 | SETUP_HOST_ATTRIBUTE_RD(speed); | |
2144 | SETUP_HOST_ATTRIBUTE_RD(fabric_name); | |
016131b8 | 2145 | SETUP_HOST_ATTRIBUTE_RD(symbolic_name); |
b8d08210 | 2146 | SETUP_HOST_ATTRIBUTE_RW(system_hostname); |
1da177e4 LT |
2147 | |
2148 | /* Transport-managed attributes */ | |
2149 | SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type); | |
91ca7b01 AV |
2150 | if (ft->issue_fc_host_lip) |
2151 | SETUP_PRIVATE_HOST_ATTRIBUTE_RW(issue_lip); | |
a53eb5e0 JS |
2152 | if (ft->vport_create) |
2153 | SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_create); | |
2154 | if (ft->vport_delete) | |
2155 | SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_delete); | |
1da177e4 LT |
2156 | |
2157 | BUG_ON(count > FC_HOST_NUM_ATTRS); | |
2158 | ||
2159 | i->host_attrs[count] = NULL; | |
2160 | ||
2161 | /* | |
2162 | * Setup Remote Port Attributes. | |
2163 | */ | |
2164 | count=0; | |
2165 | SETUP_RPORT_ATTRIBUTE_RD(maxframe_size); | |
2166 | SETUP_RPORT_ATTRIBUTE_RD(supported_classes); | |
2167 | SETUP_RPORT_ATTRIBUTE_RW(dev_loss_tmo); | |
2168 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(node_name); | |
2169 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_name); | |
2170 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_id); | |
2171 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(roles); | |
2172 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_state); | |
2173 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(scsi_target_id); | |
fff9d40c | 2174 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(fast_io_fail_tmo); |
1da177e4 LT |
2175 | |
2176 | BUG_ON(count > FC_RPORT_NUM_ATTRS); | |
2177 | ||
2178 | i->rport_attrs[count] = NULL; | |
2179 | ||
a53eb5e0 JS |
2180 | /* |
2181 | * Setup Virtual Port Attributes. | |
2182 | */ | |
2183 | count=0; | |
2184 | SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_state); | |
2185 | SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_last_state); | |
2186 | SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(node_name); | |
2187 | SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(port_name); | |
2188 | SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(roles); | |
2189 | SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_type); | |
2190 | SETUP_VPORT_ATTRIBUTE_RW(symbolic_name); | |
2191 | SETUP_VPORT_ATTRIBUTE_WR(vport_delete); | |
2192 | SETUP_VPORT_ATTRIBUTE_WR(vport_disable); | |
2193 | ||
2194 | BUG_ON(count > FC_VPORT_NUM_ATTRS); | |
2195 | ||
2196 | i->vport_attrs[count] = NULL; | |
2197 | ||
1da177e4 LT |
2198 | return &i->t; |
2199 | } | |
2200 | EXPORT_SYMBOL(fc_attach_transport); | |
2201 | ||
2202 | void fc_release_transport(struct scsi_transport_template *t) | |
2203 | { | |
2204 | struct fc_internal *i = to_fc_internal(t); | |
2205 | ||
2206 | transport_container_unregister(&i->t.target_attrs); | |
2207 | transport_container_unregister(&i->t.host_attrs); | |
2208 | transport_container_unregister(&i->rport_attr_cont); | |
a53eb5e0 | 2209 | transport_container_unregister(&i->vport_attr_cont); |
1da177e4 LT |
2210 | |
2211 | kfree(i); | |
2212 | } | |
2213 | EXPORT_SYMBOL(fc_release_transport); | |
2214 | ||
aedf3497 JS |
2215 | /** |
2216 | * fc_queue_work - Queue work to the fc_host workqueue. | |
2217 | * @shost: Pointer to Scsi_Host bound to fc_host. | |
2218 | * @work: Work to queue for execution. | |
2219 | * | |
2220 | * Return value: | |
a0785edf JS |
2221 | * 1 - work queued for execution |
2222 | * 0 - work is already queued | |
2223 | * -EINVAL - work queue doesn't exist | |
eb44820c | 2224 | */ |
aedf3497 JS |
2225 | static int |
2226 | fc_queue_work(struct Scsi_Host *shost, struct work_struct *work) | |
2227 | { | |
2228 | if (unlikely(!fc_host_work_q(shost))) { | |
2229 | printk(KERN_ERR | |
2230 | "ERROR: FC host '%s' attempted to queue work, " | |
2231 | "when no workqueue created.\n", shost->hostt->name); | |
2232 | dump_stack(); | |
2233 | ||
2234 | return -EINVAL; | |
2235 | } | |
2236 | ||
2237 | return queue_work(fc_host_work_q(shost), work); | |
2238 | } | |
2239 | ||
2240 | /** | |
2241 | * fc_flush_work - Flush a fc_host's workqueue. | |
2242 | * @shost: Pointer to Scsi_Host bound to fc_host. | |
eb44820c | 2243 | */ |
aedf3497 JS |
2244 | static void |
2245 | fc_flush_work(struct Scsi_Host *shost) | |
2246 | { | |
2247 | if (!fc_host_work_q(shost)) { | |
2248 | printk(KERN_ERR | |
2249 | "ERROR: FC host '%s' attempted to flush work, " | |
2250 | "when no workqueue created.\n", shost->hostt->name); | |
2251 | dump_stack(); | |
2252 | return; | |
2253 | } | |
2254 | ||
2255 | flush_workqueue(fc_host_work_q(shost)); | |
2256 | } | |
2257 | ||
2258 | /** | |
2259 | * fc_queue_devloss_work - Schedule work for the fc_host devloss workqueue. | |
2260 | * @shost: Pointer to Scsi_Host bound to fc_host. | |
2261 | * @work: Work to queue for execution. | |
2262 | * @delay: jiffies to delay the work queuing | |
2263 | * | |
2264 | * Return value: | |
0f29b966 | 2265 | * 1 on success / 0 already queued / < 0 for error |
eb44820c | 2266 | */ |
aedf3497 | 2267 | static int |
c4028958 | 2268 | fc_queue_devloss_work(struct Scsi_Host *shost, struct delayed_work *work, |
aedf3497 JS |
2269 | unsigned long delay) |
2270 | { | |
2271 | if (unlikely(!fc_host_devloss_work_q(shost))) { | |
2272 | printk(KERN_ERR | |
2273 | "ERROR: FC host '%s' attempted to queue work, " | |
2274 | "when no workqueue created.\n", shost->hostt->name); | |
2275 | dump_stack(); | |
2276 | ||
2277 | return -EINVAL; | |
2278 | } | |
2279 | ||
2280 | return queue_delayed_work(fc_host_devloss_work_q(shost), work, delay); | |
2281 | } | |
2282 | ||
2283 | /** | |
2284 | * fc_flush_devloss - Flush a fc_host's devloss workqueue. | |
2285 | * @shost: Pointer to Scsi_Host bound to fc_host. | |
eb44820c | 2286 | */ |
aedf3497 JS |
2287 | static void |
2288 | fc_flush_devloss(struct Scsi_Host *shost) | |
2289 | { | |
2290 | if (!fc_host_devloss_work_q(shost)) { | |
2291 | printk(KERN_ERR | |
2292 | "ERROR: FC host '%s' attempted to flush work, " | |
2293 | "when no workqueue created.\n", shost->hostt->name); | |
2294 | dump_stack(); | |
2295 | return; | |
2296 | } | |
2297 | ||
2298 | flush_workqueue(fc_host_devloss_work_q(shost)); | |
2299 | } | |
2300 | ||
1da177e4 LT |
2301 | |
2302 | /** | |
eb44820c RL |
2303 | * fc_remove_host - called to terminate any fc_transport-related elements for a scsi host. |
2304 | * @shost: Which &Scsi_Host | |
1da177e4 LT |
2305 | * |
2306 | * This routine is expected to be called immediately preceeding the | |
2307 | * a driver's call to scsi_remove_host(). | |
2308 | * | |
2309 | * WARNING: A driver utilizing the fc_transport, which fails to call | |
eb44820c | 2310 | * this routine prior to scsi_remove_host(), will leave dangling |
1da177e4 LT |
2311 | * objects in /sys/class/fc_remote_ports. Access to any of these |
2312 | * objects can result in a system crash !!! | |
2313 | * | |
2314 | * Notes: | |
2315 | * This routine assumes no locks are held on entry. | |
eb44820c | 2316 | */ |
1da177e4 LT |
2317 | void |
2318 | fc_remove_host(struct Scsi_Host *shost) | |
2319 | { | |
a53eb5e0 JS |
2320 | struct fc_vport *vport = NULL, *next_vport = NULL; |
2321 | struct fc_rport *rport = NULL, *next_rport = NULL; | |
aedf3497 JS |
2322 | struct workqueue_struct *work_q; |
2323 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); | |
a53eb5e0 | 2324 | unsigned long flags; |
a53eb5e0 JS |
2325 | |
2326 | spin_lock_irqsave(shost->host_lock, flags); | |
2327 | ||
2328 | /* Remove any vports */ | |
9ef3e4a4 JS |
2329 | list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers) |
2330 | fc_queue_work(shost, &vport->vport_delete_work); | |
1da177e4 LT |
2331 | |
2332 | /* Remove any remote ports */ | |
2333 | list_for_each_entry_safe(rport, next_rport, | |
aedf3497 JS |
2334 | &fc_host->rports, peers) { |
2335 | list_del(&rport->peers); | |
2336 | rport->port_state = FC_PORTSTATE_DELETED; | |
2337 | fc_queue_work(shost, &rport->rport_delete_work); | |
2338 | } | |
2339 | ||
1da177e4 | 2340 | list_for_each_entry_safe(rport, next_rport, |
aedf3497 JS |
2341 | &fc_host->rport_bindings, peers) { |
2342 | list_del(&rport->peers); | |
2343 | rport->port_state = FC_PORTSTATE_DELETED; | |
2344 | fc_queue_work(shost, &rport->rport_delete_work); | |
2345 | } | |
2346 | ||
a53eb5e0 JS |
2347 | spin_unlock_irqrestore(shost->host_lock, flags); |
2348 | ||
aedf3497 JS |
2349 | /* flush all scan work items */ |
2350 | scsi_flush_work(shost); | |
2351 | ||
2352 | /* flush all stgt delete, and rport delete work items, then kill it */ | |
2353 | if (fc_host->work_q) { | |
2354 | work_q = fc_host->work_q; | |
2355 | fc_host->work_q = NULL; | |
2356 | destroy_workqueue(work_q); | |
2357 | } | |
2358 | ||
2359 | /* flush all devloss work items, then kill it */ | |
2360 | if (fc_host->devloss_work_q) { | |
2361 | work_q = fc_host->devloss_work_q; | |
2362 | fc_host->devloss_work_q = NULL; | |
2363 | destroy_workqueue(work_q); | |
2364 | } | |
1da177e4 LT |
2365 | } |
2366 | EXPORT_SYMBOL(fc_remove_host); | |
2367 | ||
fff9d40c MC |
2368 | static void fc_terminate_rport_io(struct fc_rport *rport) |
2369 | { | |
2370 | struct Scsi_Host *shost = rport_to_shost(rport); | |
2371 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
2372 | ||
2373 | /* Involve the LLDD if possible to terminate all io on the rport. */ | |
2374 | if (i->f->terminate_rport_io) | |
2375 | i->f->terminate_rport_io(rport); | |
2376 | ||
2377 | /* | |
2378 | * must unblock to flush queued IO. The caller will have set | |
2379 | * the port_state or flags, so that fc_remote_port_chkready will | |
2380 | * fail IO. | |
2381 | */ | |
2382 | scsi_target_unblock(&rport->dev); | |
2383 | } | |
aedf3497 JS |
2384 | |
2385 | /** | |
2386 | * fc_starget_delete - called to delete the scsi decendents of an rport | |
c4028958 | 2387 | * @work: remote port to be operated on. |
eb44820c RL |
2388 | * |
2389 | * Deletes target and all sdevs. | |
2390 | */ | |
19a7b4ae | 2391 | static void |
c4028958 | 2392 | fc_starget_delete(struct work_struct *work) |
19a7b4ae | 2393 | { |
c4028958 DH |
2394 | struct fc_rport *rport = |
2395 | container_of(work, struct fc_rport, stgt_delete_work); | |
19a7b4ae | 2396 | |
fff9d40c | 2397 | fc_terminate_rport_io(rport); |
19a7b4ae JSEC |
2398 | scsi_remove_target(&rport->dev); |
2399 | } | |
2400 | ||
aedf3497 JS |
2401 | |
2402 | /** | |
2403 | * fc_rport_final_delete - finish rport termination and delete it. | |
c4028958 | 2404 | * @work: remote port to be deleted. |
eb44820c | 2405 | */ |
aedf3497 | 2406 | static void |
c4028958 | 2407 | fc_rport_final_delete(struct work_struct *work) |
aedf3497 | 2408 | { |
c4028958 DH |
2409 | struct fc_rport *rport = |
2410 | container_of(work, struct fc_rport, rport_delete_work); | |
aedf3497 JS |
2411 | struct device *dev = &rport->dev; |
2412 | struct Scsi_Host *shost = rport_to_shost(rport); | |
0f29b966 | 2413 | struct fc_internal *i = to_fc_internal(shost->transportt); |
92740b24 | 2414 | unsigned long flags; |
8798a694 | 2415 | int do_callback = 0; |
aedf3497 JS |
2416 | |
2417 | /* | |
9ef3e4a4 | 2418 | * if a scan is pending, flush the SCSI Host work_q so that |
aedf3497 JS |
2419 | * that we can reclaim the rport scan work element. |
2420 | */ | |
2421 | if (rport->flags & FC_RPORT_SCAN_PENDING) | |
2422 | scsi_flush_work(shost); | |
2423 | ||
fff9d40c | 2424 | fc_terminate_rport_io(rport); |
9e4f5e29 | 2425 | |
92740b24 JS |
2426 | /* |
2427 | * Cancel any outstanding timers. These should really exist | |
2428 | * only when rmmod'ing the LLDD and we're asking for | |
2429 | * immediate termination of the rports | |
2430 | */ | |
2431 | spin_lock_irqsave(shost->host_lock, flags); | |
2432 | if (rport->flags & FC_RPORT_DEVLOSS_PENDING) { | |
2433 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2434 | if (!cancel_delayed_work(&rport->fail_io_work)) | |
2435 | fc_flush_devloss(shost); | |
2436 | if (!cancel_delayed_work(&rport->dev_loss_work)) | |
2437 | fc_flush_devloss(shost); | |
2438 | spin_lock_irqsave(shost->host_lock, flags); | |
2439 | rport->flags &= ~FC_RPORT_DEVLOSS_PENDING; | |
2440 | } | |
2441 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2442 | ||
0f29b966 JS |
2443 | /* Delete SCSI target and sdevs */ |
2444 | if (rport->scsi_target_id != -1) | |
c4028958 | 2445 | fc_starget_delete(&rport->stgt_delete_work); |
92740b24 JS |
2446 | |
2447 | /* | |
2448 | * Notify the driver that the rport is now dead. The LLDD will | |
2449 | * also guarantee that any communication to the rport is terminated | |
4be98c0c JS |
2450 | * |
2451 | * Avoid this call if we already called it when we preserved the | |
2452 | * rport for the binding. | |
92740b24 | 2453 | */ |
8798a694 | 2454 | spin_lock_irqsave(shost->host_lock, flags); |
4be98c0c | 2455 | if (!(rport->flags & FC_RPORT_DEVLOSS_CALLBK_DONE) && |
8798a694 MR |
2456 | (i->f->dev_loss_tmo_callbk)) { |
2457 | rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE; | |
2458 | do_callback = 1; | |
2459 | } | |
2460 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2461 | ||
2462 | if (do_callback) | |
0f29b966 | 2463 | i->f->dev_loss_tmo_callbk(rport); |
0f29b966 | 2464 | |
9e4f5e29 JS |
2465 | fc_bsg_remove(rport->rqst_q); |
2466 | ||
aedf3497 JS |
2467 | transport_remove_device(dev); |
2468 | device_del(dev); | |
2469 | transport_destroy_device(dev); | |
3bdad7bd JS |
2470 | put_device(&shost->shost_gendev); /* for fc_host->rport list */ |
2471 | put_device(dev); /* for self-reference */ | |
aedf3497 JS |
2472 | } |
2473 | ||
2474 | ||
1da177e4 LT |
2475 | /** |
2476 | * fc_rport_create - allocates and creates a remote FC port. | |
2477 | * @shost: scsi host the remote port is connected to. | |
2478 | * @channel: Channel on shost port connected to. | |
2479 | * @ids: The world wide names, fc address, and FC4 port | |
2480 | * roles for the remote port. | |
2481 | * | |
2482 | * Allocates and creates the remoter port structure, including the | |
2483 | * class and sysfs creation. | |
2484 | * | |
2485 | * Notes: | |
2486 | * This routine assumes no locks are held on entry. | |
eb44820c | 2487 | */ |
44818efb | 2488 | static struct fc_rport * |
1da177e4 LT |
2489 | fc_rport_create(struct Scsi_Host *shost, int channel, |
2490 | struct fc_rport_identifiers *ids) | |
2491 | { | |
aedf3497 | 2492 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
1da177e4 LT |
2493 | struct fc_internal *fci = to_fc_internal(shost->transportt); |
2494 | struct fc_rport *rport; | |
2495 | struct device *dev; | |
2496 | unsigned long flags; | |
2497 | int error; | |
2498 | size_t size; | |
2499 | ||
2500 | size = (sizeof(struct fc_rport) + fci->f->dd_fcrport_size); | |
24669f75 | 2501 | rport = kzalloc(size, GFP_KERNEL); |
1da177e4 | 2502 | if (unlikely(!rport)) { |
cadbd4a5 | 2503 | printk(KERN_ERR "%s: allocation failure\n", __func__); |
1da177e4 LT |
2504 | return NULL; |
2505 | } | |
1da177e4 LT |
2506 | |
2507 | rport->maxframe_size = -1; | |
2508 | rport->supported_classes = FC_COS_UNSPECIFIED; | |
2509 | rport->dev_loss_tmo = fc_dev_loss_tmo; | |
2510 | memcpy(&rport->node_name, &ids->node_name, sizeof(rport->node_name)); | |
2511 | memcpy(&rport->port_name, &ids->port_name, sizeof(rport->port_name)); | |
2512 | rport->port_id = ids->port_id; | |
2513 | rport->roles = ids->roles; | |
2514 | rport->port_state = FC_PORTSTATE_ONLINE; | |
2515 | if (fci->f->dd_fcrport_size) | |
2516 | rport->dd_data = &rport[1]; | |
2517 | rport->channel = channel; | |
0f29b966 | 2518 | rport->fast_io_fail_tmo = -1; |
1da177e4 | 2519 | |
c4028958 DH |
2520 | INIT_DELAYED_WORK(&rport->dev_loss_work, fc_timeout_deleted_rport); |
2521 | INIT_DELAYED_WORK(&rport->fail_io_work, fc_timeout_fail_rport_io); | |
2522 | INIT_WORK(&rport->scan_work, fc_scsi_scan_rport); | |
2523 | INIT_WORK(&rport->stgt_delete_work, fc_starget_delete); | |
2524 | INIT_WORK(&rport->rport_delete_work, fc_rport_final_delete); | |
1da177e4 LT |
2525 | |
2526 | spin_lock_irqsave(shost->host_lock, flags); | |
2527 | ||
2528 | rport->number = fc_host->next_rport_number++; | |
a53eb5e0 | 2529 | if (rport->roles & FC_PORT_ROLE_FCP_TARGET) |
1da177e4 LT |
2530 | rport->scsi_target_id = fc_host->next_target_id++; |
2531 | else | |
2532 | rport->scsi_target_id = -1; | |
aedf3497 | 2533 | list_add_tail(&rport->peers, &fc_host->rports); |
3bdad7bd | 2534 | get_device(&shost->shost_gendev); /* for fc_host->rport list */ |
1da177e4 LT |
2535 | |
2536 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2537 | ||
2538 | dev = &rport->dev; | |
3bdad7bd JS |
2539 | device_initialize(dev); /* takes self reference */ |
2540 | dev->parent = get_device(&shost->shost_gendev); /* parent reference */ | |
1da177e4 | 2541 | dev->release = fc_rport_dev_release; |
71610f55 KS |
2542 | dev_set_name(dev, "rport-%d:%d-%d", |
2543 | shost->host_no, channel, rport->number); | |
1da177e4 LT |
2544 | transport_setup_device(dev); |
2545 | ||
2546 | error = device_add(dev); | |
2547 | if (error) { | |
2548 | printk(KERN_ERR "FC Remote Port device_add failed\n"); | |
2549 | goto delete_rport; | |
2550 | } | |
2551 | transport_add_device(dev); | |
2552 | transport_configure_device(dev); | |
2553 | ||
9e4f5e29 JS |
2554 | fc_bsg_rportadd(shost, rport); |
2555 | /* ignore any bsg add error - we just can't do sgio */ | |
2556 | ||
a53eb5e0 | 2557 | if (rport->roles & FC_PORT_ROLE_FCP_TARGET) { |
1da177e4 | 2558 | /* initiate a scan of the target */ |
aedf3497 | 2559 | rport->flags |= FC_RPORT_SCAN_PENDING; |
1da177e4 | 2560 | scsi_queue_work(shost, &rport->scan_work); |
aedf3497 | 2561 | } |
1da177e4 LT |
2562 | |
2563 | return rport; | |
2564 | ||
2565 | delete_rport: | |
2566 | transport_destroy_device(dev); | |
1da177e4 LT |
2567 | spin_lock_irqsave(shost->host_lock, flags); |
2568 | list_del(&rport->peers); | |
3bdad7bd | 2569 | put_device(&shost->shost_gendev); /* for fc_host->rport list */ |
1da177e4 LT |
2570 | spin_unlock_irqrestore(shost->host_lock, flags); |
2571 | put_device(dev->parent); | |
2572 | kfree(rport); | |
2573 | return NULL; | |
2574 | } | |
2575 | ||
2576 | /** | |
eb44820c | 2577 | * fc_remote_port_add - notify fc transport of the existence of a remote FC port. |
1da177e4 LT |
2578 | * @shost: scsi host the remote port is connected to. |
2579 | * @channel: Channel on shost port connected to. | |
2580 | * @ids: The world wide names, fc address, and FC4 port | |
2581 | * roles for the remote port. | |
2582 | * | |
2583 | * The LLDD calls this routine to notify the transport of the existence | |
2584 | * of a remote port. The LLDD provides the unique identifiers (wwpn,wwn) | |
2585 | * of the port, it's FC address (port_id), and the FC4 roles that are | |
2586 | * active for the port. | |
2587 | * | |
2588 | * For ports that are FCP targets (aka scsi targets), the FC transport | |
2589 | * maintains consistent target id bindings on behalf of the LLDD. | |
2590 | * A consistent target id binding is an assignment of a target id to | |
2591 | * a remote port identifier, which persists while the scsi host is | |
2592 | * attached. The remote port can disappear, then later reappear, and | |
2593 | * it's target id assignment remains the same. This allows for shifts | |
2594 | * in FC addressing (if binding by wwpn or wwnn) with no apparent | |
2595 | * changes to the scsi subsystem which is based on scsi host number and | |
2596 | * target id values. Bindings are only valid during the attachment of | |
2597 | * the scsi host. If the host detaches, then later re-attaches, target | |
2598 | * id bindings may change. | |
2599 | * | |
2600 | * This routine is responsible for returning a remote port structure. | |
2601 | * The routine will search the list of remote ports it maintains | |
2602 | * internally on behalf of consistent target id mappings. If found, the | |
2603 | * remote port structure will be reused. Otherwise, a new remote port | |
2604 | * structure will be allocated. | |
2605 | * | |
2606 | * Whenever a remote port is allocated, a new fc_remote_port class | |
2607 | * device is created. | |
2608 | * | |
2609 | * Should not be called from interrupt context. | |
2610 | * | |
2611 | * Notes: | |
2612 | * This routine assumes no locks are held on entry. | |
eb44820c | 2613 | */ |
1da177e4 LT |
2614 | struct fc_rport * |
2615 | fc_remote_port_add(struct Scsi_Host *shost, int channel, | |
2616 | struct fc_rport_identifiers *ids) | |
2617 | { | |
19a7b4ae | 2618 | struct fc_internal *fci = to_fc_internal(shost->transportt); |
aedf3497 | 2619 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
1da177e4 LT |
2620 | struct fc_rport *rport; |
2621 | unsigned long flags; | |
2622 | int match = 0; | |
2623 | ||
aedf3497 JS |
2624 | /* ensure any stgt delete functions are done */ |
2625 | fc_flush_work(shost); | |
2626 | ||
19a7b4ae JSEC |
2627 | /* |
2628 | * Search the list of "active" rports, for an rport that has been | |
2629 | * deleted, but we've held off the real delete while the target | |
2630 | * is in a "blocked" state. | |
2631 | */ | |
2632 | spin_lock_irqsave(shost->host_lock, flags); | |
2633 | ||
aedf3497 | 2634 | list_for_each_entry(rport, &fc_host->rports, peers) { |
19a7b4ae JSEC |
2635 | |
2636 | if ((rport->port_state == FC_PORTSTATE_BLOCKED) && | |
2637 | (rport->channel == channel)) { | |
2638 | ||
aedf3497 | 2639 | switch (fc_host->tgtid_bind_type) { |
19a7b4ae JSEC |
2640 | case FC_TGTID_BIND_BY_WWPN: |
2641 | case FC_TGTID_BIND_NONE: | |
2642 | if (rport->port_name == ids->port_name) | |
2643 | match = 1; | |
2644 | break; | |
2645 | case FC_TGTID_BIND_BY_WWNN: | |
2646 | if (rport->node_name == ids->node_name) | |
2647 | match = 1; | |
2648 | break; | |
2649 | case FC_TGTID_BIND_BY_ID: | |
2650 | if (rport->port_id == ids->port_id) | |
2651 | match = 1; | |
2652 | break; | |
2653 | } | |
2654 | ||
2655 | if (match) { | |
19a7b4ae JSEC |
2656 | |
2657 | memcpy(&rport->node_name, &ids->node_name, | |
2658 | sizeof(rport->node_name)); | |
2659 | memcpy(&rport->port_name, &ids->port_name, | |
2660 | sizeof(rport->port_name)); | |
2661 | rport->port_id = ids->port_id; | |
2662 | ||
2663 | rport->port_state = FC_PORTSTATE_ONLINE; | |
2664 | rport->roles = ids->roles; | |
2665 | ||
2666 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2667 | ||
2668 | if (fci->f->dd_fcrport_size) | |
2669 | memset(rport->dd_data, 0, | |
2670 | fci->f->dd_fcrport_size); | |
2671 | ||
2672 | /* | |
92740b24 JS |
2673 | * If we were not a target, cancel the |
2674 | * io terminate and rport timers, and | |
2675 | * we're done. | |
2676 | * | |
2677 | * If we were a target, but our new role | |
2678 | * doesn't indicate a target, leave the | |
2679 | * timers running expecting the role to | |
2680 | * change as the target fully logs in. If | |
2681 | * it doesn't, the target will be torn down. | |
2682 | * | |
2683 | * If we were a target, and our role shows | |
2684 | * we're still a target, cancel the timers | |
2685 | * and kick off a scan. | |
19a7b4ae | 2686 | */ |
19a7b4ae | 2687 | |
92740b24 JS |
2688 | /* was a target, not in roles */ |
2689 | if ((rport->scsi_target_id != -1) && | |
a53eb5e0 | 2690 | (!(ids->roles & FC_PORT_ROLE_FCP_TARGET))) |
92740b24 | 2691 | return rport; |
19a7b4ae JSEC |
2692 | |
2693 | /* | |
92740b24 JS |
2694 | * Stop the fail io and dev_loss timers. |
2695 | * If they flush, the port_state will | |
2696 | * be checked and will NOOP the function. | |
19a7b4ae | 2697 | */ |
0f29b966 JS |
2698 | if (!cancel_delayed_work(&rport->fail_io_work)) |
2699 | fc_flush_devloss(shost); | |
92740b24 | 2700 | if (!cancel_delayed_work(&rport->dev_loss_work)) |
aedf3497 JS |
2701 | fc_flush_devloss(shost); |
2702 | ||
2703 | spin_lock_irqsave(shost->host_lock, flags); | |
2704 | ||
fff9d40c | 2705 | rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT | |
4be98c0c JS |
2706 | FC_RPORT_DEVLOSS_PENDING | |
2707 | FC_RPORT_DEVLOSS_CALLBK_DONE); | |
19a7b4ae | 2708 | |
92740b24 JS |
2709 | /* if target, initiate a scan */ |
2710 | if (rport->scsi_target_id != -1) { | |
2711 | rport->flags |= FC_RPORT_SCAN_PENDING; | |
2712 | scsi_queue_work(shost, | |
2713 | &rport->scan_work); | |
2714 | spin_unlock_irqrestore(shost->host_lock, | |
2715 | flags); | |
2716 | scsi_target_unblock(&rport->dev); | |
2717 | } else | |
2718 | spin_unlock_irqrestore(shost->host_lock, | |
2719 | flags); | |
a0785edf | 2720 | |
9e4f5e29 JS |
2721 | fc_bsg_goose_queue(rport); |
2722 | ||
19a7b4ae JSEC |
2723 | return rport; |
2724 | } | |
2725 | } | |
2726 | } | |
2727 | ||
92740b24 JS |
2728 | /* |
2729 | * Search the bindings array | |
2730 | * Note: if never a FCP target, you won't be on this list | |
2731 | */ | |
aedf3497 | 2732 | if (fc_host->tgtid_bind_type != FC_TGTID_BIND_NONE) { |
1da177e4 LT |
2733 | |
2734 | /* search for a matching consistent binding */ | |
2735 | ||
aedf3497 | 2736 | list_for_each_entry(rport, &fc_host->rport_bindings, |
1da177e4 LT |
2737 | peers) { |
2738 | if (rport->channel != channel) | |
2739 | continue; | |
2740 | ||
aedf3497 | 2741 | switch (fc_host->tgtid_bind_type) { |
1da177e4 LT |
2742 | case FC_TGTID_BIND_BY_WWPN: |
2743 | if (rport->port_name == ids->port_name) | |
2744 | match = 1; | |
2745 | break; | |
2746 | case FC_TGTID_BIND_BY_WWNN: | |
2747 | if (rport->node_name == ids->node_name) | |
2748 | match = 1; | |
2749 | break; | |
2750 | case FC_TGTID_BIND_BY_ID: | |
2751 | if (rport->port_id == ids->port_id) | |
2752 | match = 1; | |
2753 | break; | |
2754 | case FC_TGTID_BIND_NONE: /* to keep compiler happy */ | |
2755 | break; | |
2756 | } | |
2757 | ||
2758 | if (match) { | |
aedf3497 | 2759 | list_move_tail(&rport->peers, &fc_host->rports); |
1da177e4 LT |
2760 | break; |
2761 | } | |
2762 | } | |
2763 | ||
1da177e4 LT |
2764 | if (match) { |
2765 | memcpy(&rport->node_name, &ids->node_name, | |
2766 | sizeof(rport->node_name)); | |
2767 | memcpy(&rport->port_name, &ids->port_name, | |
2768 | sizeof(rport->port_name)); | |
2769 | rport->port_id = ids->port_id; | |
2770 | rport->roles = ids->roles; | |
2771 | rport->port_state = FC_PORTSTATE_ONLINE; | |
fff9d40c | 2772 | rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT; |
1da177e4 | 2773 | |
19a7b4ae JSEC |
2774 | if (fci->f->dd_fcrport_size) |
2775 | memset(rport->dd_data, 0, | |
2776 | fci->f->dd_fcrport_size); | |
2777 | ||
a53eb5e0 | 2778 | if (rport->roles & FC_PORT_ROLE_FCP_TARGET) { |
1da177e4 | 2779 | /* initiate a scan of the target */ |
aedf3497 | 2780 | rport->flags |= FC_RPORT_SCAN_PENDING; |
1da177e4 | 2781 | scsi_queue_work(shost, &rport->scan_work); |
a0785edf JS |
2782 | spin_unlock_irqrestore(shost->host_lock, flags); |
2783 | scsi_target_unblock(&rport->dev); | |
2784 | } else | |
2785 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1da177e4 LT |
2786 | |
2787 | return rport; | |
2788 | } | |
2789 | } | |
2790 | ||
19a7b4ae JSEC |
2791 | spin_unlock_irqrestore(shost->host_lock, flags); |
2792 | ||
1da177e4 LT |
2793 | /* No consistent binding found - create new remote port entry */ |
2794 | rport = fc_rport_create(shost, channel, ids); | |
2795 | ||
2796 | return rport; | |
2797 | } | |
2798 | EXPORT_SYMBOL(fc_remote_port_add); | |
2799 | ||
1da177e4 LT |
2800 | |
2801 | /** | |
eb44820c | 2802 | * fc_remote_port_delete - notifies the fc transport that a remote port is no longer in existence. |
1da177e4 LT |
2803 | * @rport: The remote port that no longer exists |
2804 | * | |
2805 | * The LLDD calls this routine to notify the transport that a remote | |
2806 | * port is no longer part of the topology. Note: Although a port | |
2807 | * may no longer be part of the topology, it may persist in the remote | |
19a7b4ae | 2808 | * ports displayed by the fc_host. We do this under 2 conditions: |
eb44820c | 2809 | * 1) If the port was a scsi target, we delay its deletion by "blocking" it. |
19a7b4ae JSEC |
2810 | * This allows the port to temporarily disappear, then reappear without |
2811 | * disrupting the SCSI device tree attached to it. During the "blocked" | |
2812 | * period the port will still exist. | |
eb44820c | 2813 | * 2) If the port was a scsi target and disappears for longer than we |
19a7b4ae JSEC |
2814 | * expect, we'll delete the port and the tear down the SCSI device tree |
2815 | * attached to it. However, we want to semi-persist the target id assigned | |
2816 | * to that port if it eventually does exist. The port structure will | |
2817 | * remain (although with minimal information) so that the target id | |
2818 | * bindings remails. | |
1da177e4 LT |
2819 | * |
2820 | * If the remote port is not an FCP Target, it will be fully torn down | |
2821 | * and deallocated, including the fc_remote_port class device. | |
2822 | * | |
19a7b4ae JSEC |
2823 | * If the remote port is an FCP Target, the port will be placed in a |
2824 | * temporary blocked state. From the LLDD's perspective, the rport no | |
2825 | * longer exists. From the SCSI midlayer's perspective, the SCSI target | |
2826 | * exists, but all sdevs on it are blocked from further I/O. The following | |
eb44820c RL |
2827 | * is then expected. |
2828 | * | |
19a7b4ae JSEC |
2829 | * If the remote port does not return (signaled by a LLDD call to |
2830 | * fc_remote_port_add()) within the dev_loss_tmo timeout, then the | |
2831 | * scsi target is removed - killing all outstanding i/o and removing the | |
2832 | * scsi devices attached ot it. The port structure will be marked Not | |
2833 | * Present and be partially cleared, leaving only enough information to | |
2834 | * recognize the remote port relative to the scsi target id binding if | |
2835 | * it later appears. The port will remain as long as there is a valid | |
2836 | * binding (e.g. until the user changes the binding type or unloads the | |
2837 | * scsi host with the binding). | |
1da177e4 | 2838 | * |
19a7b4ae JSEC |
2839 | * If the remote port returns within the dev_loss_tmo value (and matches |
2840 | * according to the target id binding type), the port structure will be | |
2841 | * reused. If it is no longer a SCSI target, the target will be torn | |
2842 | * down. If it continues to be a SCSI target, then the target will be | |
2843 | * unblocked (allowing i/o to be resumed), and a scan will be activated | |
2844 | * to ensure that all luns are detected. | |
2845 | * | |
2846 | * Called from normal process context only - cannot be called from interrupt. | |
1da177e4 LT |
2847 | * |
2848 | * Notes: | |
2849 | * This routine assumes no locks are held on entry. | |
eb44820c | 2850 | */ |
1da177e4 LT |
2851 | void |
2852 | fc_remote_port_delete(struct fc_rport *rport) | |
2853 | { | |
aedf3497 | 2854 | struct Scsi_Host *shost = rport_to_shost(rport); |
19a7b4ae | 2855 | int timeout = rport->dev_loss_tmo; |
aedf3497 JS |
2856 | unsigned long flags; |
2857 | ||
2858 | /* | |
2859 | * No need to flush the fc_host work_q's, as all adds are synchronous. | |
2860 | * | |
2861 | * We do need to reclaim the rport scan work element, so eventually | |
2862 | * (in fc_rport_final_delete()) we'll flush the scsi host work_q if | |
2863 | * there's still a scan pending. | |
2864 | */ | |
2865 | ||
2866 | spin_lock_irqsave(shost->host_lock, flags); | |
1da177e4 | 2867 | |
92740b24 | 2868 | if (rport->port_state != FC_PORTSTATE_ONLINE) { |
aedf3497 | 2869 | spin_unlock_irqrestore(shost->host_lock, flags); |
1da177e4 LT |
2870 | return; |
2871 | } | |
2872 | ||
92740b24 JS |
2873 | /* |
2874 | * In the past, we if this was not an FCP-Target, we would | |
2875 | * unconditionally just jump to deleting the rport. | |
2876 | * However, rports can be used as node containers by the LLDD, | |
2877 | * and its not appropriate to just terminate the rport at the | |
2878 | * first sign of a loss in connectivity. The LLDD may want to | |
2879 | * send ELS traffic to re-validate the login. If the rport is | |
2880 | * immediately deleted, it makes it inappropriate for a node | |
2881 | * container. | |
2882 | * So... we now unconditionally wait dev_loss_tmo before | |
2883 | * destroying an rport. | |
2884 | */ | |
2885 | ||
aedf3497 JS |
2886 | rport->port_state = FC_PORTSTATE_BLOCKED; |
2887 | ||
2888 | rport->flags |= FC_RPORT_DEVLOSS_PENDING; | |
2889 | ||
2890 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2891 | ||
7525236d FT |
2892 | if (rport->roles & FC_PORT_ROLE_FCP_INITIATOR && |
2893 | shost->active_mode & MODE_TARGET) | |
2894 | fc_tgt_it_nexus_destroy(shost, (unsigned long)rport); | |
2895 | ||
19a7b4ae | 2896 | scsi_target_block(&rport->dev); |
1da177e4 | 2897 | |
0f29b966 JS |
2898 | /* see if we need to kill io faster than waiting for device loss */ |
2899 | if ((rport->fast_io_fail_tmo != -1) && | |
fff9d40c | 2900 | (rport->fast_io_fail_tmo < timeout)) |
0f29b966 JS |
2901 | fc_queue_devloss_work(shost, &rport->fail_io_work, |
2902 | rport->fast_io_fail_tmo * HZ); | |
2903 | ||
19a7b4ae | 2904 | /* cap the length the devices can be blocked until they are deleted */ |
aedf3497 | 2905 | fc_queue_devloss_work(shost, &rport->dev_loss_work, timeout * HZ); |
1da177e4 LT |
2906 | } |
2907 | EXPORT_SYMBOL(fc_remote_port_delete); | |
2908 | ||
2909 | /** | |
eb44820c | 2910 | * fc_remote_port_rolechg - notifies the fc transport that the roles on a remote may have changed. |
1da177e4 | 2911 | * @rport: The remote port that changed. |
eb44820c | 2912 | * @roles: New roles for this port. |
1da177e4 | 2913 | * |
eb44820c RL |
2914 | * Description: The LLDD calls this routine to notify the transport that the |
2915 | * roles on a remote port may have changed. The largest effect of this is | |
1da177e4 LT |
2916 | * if a port now becomes a FCP Target, it must be allocated a |
2917 | * scsi target id. If the port is no longer a FCP target, any | |
2918 | * scsi target id value assigned to it will persist in case the | |
2919 | * role changes back to include FCP Target. No changes in the scsi | |
2920 | * midlayer will be invoked if the role changes (in the expectation | |
2921 | * that the role will be resumed. If it doesn't normal error processing | |
2922 | * will take place). | |
2923 | * | |
2924 | * Should not be called from interrupt context. | |
2925 | * | |
2926 | * Notes: | |
2927 | * This routine assumes no locks are held on entry. | |
eb44820c | 2928 | */ |
1da177e4 LT |
2929 | void |
2930 | fc_remote_port_rolechg(struct fc_rport *rport, u32 roles) | |
2931 | { | |
2932 | struct Scsi_Host *shost = rport_to_shost(rport); | |
aedf3497 | 2933 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
1da177e4 LT |
2934 | unsigned long flags; |
2935 | int create = 0; | |
7525236d | 2936 | int ret; |
1da177e4 | 2937 | |
1da177e4 | 2938 | spin_lock_irqsave(shost->host_lock, flags); |
a53eb5e0 | 2939 | if (roles & FC_PORT_ROLE_FCP_TARGET) { |
19a7b4ae JSEC |
2940 | if (rport->scsi_target_id == -1) { |
2941 | rport->scsi_target_id = fc_host->next_target_id++; | |
2942 | create = 1; | |
a53eb5e0 | 2943 | } else if (!(rport->roles & FC_PORT_ROLE_FCP_TARGET)) |
19a7b4ae | 2944 | create = 1; |
7525236d FT |
2945 | } else if (shost->active_mode & MODE_TARGET) { |
2946 | ret = fc_tgt_it_nexus_create(shost, (unsigned long)rport, | |
2947 | (char *)&rport->node_name); | |
2948 | if (ret) | |
2949 | printk(KERN_ERR "FC Remore Port tgt nexus failed %d\n", | |
2950 | ret); | |
1da177e4 | 2951 | } |
1da177e4 | 2952 | |
19a7b4ae JSEC |
2953 | rport->roles = roles; |
2954 | ||
aedf3497 JS |
2955 | spin_unlock_irqrestore(shost->host_lock, flags); |
2956 | ||
19a7b4ae JSEC |
2957 | if (create) { |
2958 | /* | |
2959 | * There may have been a delete timer running on the | |
2960 | * port. Ensure that it is cancelled as we now know | |
2961 | * the port is an FCP Target. | |
2962 | * Note: we know the rport is exists and in an online | |
2963 | * state as the LLDD would not have had an rport | |
2964 | * reference to pass us. | |
2965 | * | |
2966 | * Take no action on the del_timer failure as the state | |
2967 | * machine state change will validate the | |
2968 | * transaction. | |
2969 | */ | |
0f29b966 JS |
2970 | if (!cancel_delayed_work(&rport->fail_io_work)) |
2971 | fc_flush_devloss(shost); | |
19a7b4ae | 2972 | if (!cancel_delayed_work(&rport->dev_loss_work)) |
aedf3497 JS |
2973 | fc_flush_devloss(shost); |
2974 | ||
2975 | spin_lock_irqsave(shost->host_lock, flags); | |
fff9d40c MC |
2976 | rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT | |
2977 | FC_RPORT_DEVLOSS_PENDING); | |
aedf3497 JS |
2978 | spin_unlock_irqrestore(shost->host_lock, flags); |
2979 | ||
2980 | /* ensure any stgt delete functions are done */ | |
2981 | fc_flush_work(shost); | |
19a7b4ae | 2982 | |
1da177e4 | 2983 | /* initiate a scan of the target */ |
aedf3497 JS |
2984 | spin_lock_irqsave(shost->host_lock, flags); |
2985 | rport->flags |= FC_RPORT_SCAN_PENDING; | |
1da177e4 | 2986 | scsi_queue_work(shost, &rport->scan_work); |
aedf3497 | 2987 | spin_unlock_irqrestore(shost->host_lock, flags); |
a0785edf | 2988 | scsi_target_unblock(&rport->dev); |
19a7b4ae | 2989 | } |
1da177e4 LT |
2990 | } |
2991 | EXPORT_SYMBOL(fc_remote_port_rolechg); | |
2992 | ||
2993 | /** | |
eb44820c | 2994 | * fc_timeout_deleted_rport - Timeout handler for a deleted remote port. |
92740b24 | 2995 | * @work: rport target that failed to reappear in the allotted time. |
eb44820c RL |
2996 | * |
2997 | * Description: An attempt to delete a remote port blocks, and if it fails | |
2998 | * to return in the allotted time this gets called. | |
2999 | */ | |
1da177e4 | 3000 | static void |
c4028958 | 3001 | fc_timeout_deleted_rport(struct work_struct *work) |
1da177e4 | 3002 | { |
c4028958 DH |
3003 | struct fc_rport *rport = |
3004 | container_of(work, struct fc_rport, dev_loss_work.work); | |
19a7b4ae | 3005 | struct Scsi_Host *shost = rport_to_shost(rport); |
4be98c0c | 3006 | struct fc_internal *i = to_fc_internal(shost->transportt); |
aedf3497 | 3007 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
19a7b4ae | 3008 | unsigned long flags; |
8798a694 | 3009 | int do_callback = 0; |
1da177e4 | 3010 | |
19a7b4ae | 3011 | spin_lock_irqsave(shost->host_lock, flags); |
1da177e4 | 3012 | |
aedf3497 JS |
3013 | rport->flags &= ~FC_RPORT_DEVLOSS_PENDING; |
3014 | ||
1da177e4 | 3015 | /* |
92740b24 JS |
3016 | * If the port is ONLINE, then it came back. If it was a SCSI |
3017 | * target, validate it still is. If not, tear down the | |
3018 | * scsi_target on it. | |
1da177e4 | 3019 | */ |
aedf3497 | 3020 | if ((rport->port_state == FC_PORTSTATE_ONLINE) && |
92740b24 | 3021 | (rport->scsi_target_id != -1) && |
a53eb5e0 | 3022 | !(rport->roles & FC_PORT_ROLE_FCP_TARGET)) { |
19a7b4ae | 3023 | dev_printk(KERN_ERR, &rport->dev, |
aedf3497 JS |
3024 | "blocked FC remote port time out: no longer" |
3025 | " a FCP target, removing starget\n"); | |
aedf3497 | 3026 | spin_unlock_irqrestore(shost->host_lock, flags); |
a0785edf JS |
3027 | scsi_target_unblock(&rport->dev); |
3028 | fc_queue_work(shost, &rport->stgt_delete_work); | |
19a7b4ae JSEC |
3029 | return; |
3030 | } | |
1da177e4 | 3031 | |
92740b24 | 3032 | /* NOOP state - we're flushing workq's */ |
19a7b4ae JSEC |
3033 | if (rport->port_state != FC_PORTSTATE_BLOCKED) { |
3034 | spin_unlock_irqrestore(shost->host_lock, flags); | |
3035 | dev_printk(KERN_ERR, &rport->dev, | |
92740b24 JS |
3036 | "blocked FC remote port time out: leaving" |
3037 | " rport%s alone\n", | |
3038 | (rport->scsi_target_id != -1) ? " and starget" : ""); | |
19a7b4ae JSEC |
3039 | return; |
3040 | } | |
1da177e4 | 3041 | |
92740b24 JS |
3042 | if ((fc_host->tgtid_bind_type == FC_TGTID_BIND_NONE) || |
3043 | (rport->scsi_target_id == -1)) { | |
aedf3497 JS |
3044 | list_del(&rport->peers); |
3045 | rport->port_state = FC_PORTSTATE_DELETED; | |
19a7b4ae | 3046 | dev_printk(KERN_ERR, &rport->dev, |
92740b24 JS |
3047 | "blocked FC remote port time out: removing" |
3048 | " rport%s\n", | |
3049 | (rport->scsi_target_id != -1) ? " and starget" : ""); | |
aedf3497 JS |
3050 | fc_queue_work(shost, &rport->rport_delete_work); |
3051 | spin_unlock_irqrestore(shost->host_lock, flags); | |
19a7b4ae JSEC |
3052 | return; |
3053 | } | |
1da177e4 | 3054 | |
19a7b4ae JSEC |
3055 | dev_printk(KERN_ERR, &rport->dev, |
3056 | "blocked FC remote port time out: removing target and " | |
3057 | "saving binding\n"); | |
3058 | ||
aedf3497 | 3059 | list_move_tail(&rport->peers, &fc_host->rport_bindings); |
1da177e4 LT |
3060 | |
3061 | /* | |
19a7b4ae JSEC |
3062 | * Note: We do not remove or clear the hostdata area. This allows |
3063 | * host-specific target data to persist along with the | |
3064 | * scsi_target_id. It's up to the host to manage it's hostdata area. | |
1da177e4 | 3065 | */ |
1da177e4 | 3066 | |
19a7b4ae JSEC |
3067 | /* |
3068 | * Reinitialize port attributes that may change if the port comes back. | |
3069 | */ | |
3070 | rport->maxframe_size = -1; | |
3071 | rport->supported_classes = FC_COS_UNSPECIFIED; | |
a53eb5e0 | 3072 | rport->roles = FC_PORT_ROLE_UNKNOWN; |
aedf3497 | 3073 | rport->port_state = FC_PORTSTATE_NOTPRESENT; |
fff9d40c | 3074 | rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT; |
1da177e4 | 3075 | |
f78badb1 JS |
3076 | /* |
3077 | * Pre-emptively kill I/O rather than waiting for the work queue | |
3078 | * item to teardown the starget. (FCOE libFC folks prefer this | |
3079 | * and to have the rport_port_id still set when it's done). | |
3080 | */ | |
3081 | spin_unlock_irqrestore(shost->host_lock, flags); | |
3082 | fc_terminate_rport_io(rport); | |
3083 | ||
8798a694 MR |
3084 | spin_lock_irqsave(shost->host_lock, flags); |
3085 | ||
3086 | if (rport->port_state == FC_PORTSTATE_NOTPRESENT) { /* still missing */ | |
f78badb1 | 3087 | |
8798a694 MR |
3088 | /* remove the identifiers that aren't used in the consisting binding */ |
3089 | switch (fc_host->tgtid_bind_type) { | |
3090 | case FC_TGTID_BIND_BY_WWPN: | |
3091 | rport->node_name = -1; | |
3092 | rport->port_id = -1; | |
3093 | break; | |
3094 | case FC_TGTID_BIND_BY_WWNN: | |
3095 | rport->port_name = -1; | |
3096 | rport->port_id = -1; | |
3097 | break; | |
3098 | case FC_TGTID_BIND_BY_ID: | |
3099 | rport->node_name = -1; | |
3100 | rport->port_name = -1; | |
3101 | break; | |
3102 | case FC_TGTID_BIND_NONE: /* to keep compiler happy */ | |
3103 | break; | |
3104 | } | |
3105 | ||
3106 | /* | |
3107 | * As this only occurs if the remote port (scsi target) | |
3108 | * went away and didn't come back - we'll remove | |
3109 | * all attached scsi devices. | |
3110 | */ | |
3111 | rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE; | |
3112 | fc_queue_work(shost, &rport->stgt_delete_work); | |
3113 | ||
3114 | do_callback = 1; | |
19a7b4ae JSEC |
3115 | } |
3116 | ||
8798a694 | 3117 | spin_unlock_irqrestore(shost->host_lock, flags); |
4be98c0c JS |
3118 | |
3119 | /* | |
3120 | * Notify the driver that the rport is now dead. The LLDD will | |
3121 | * also guarantee that any communication to the rport is terminated | |
3122 | * | |
3123 | * Note: we set the CALLBK_DONE flag above to correspond | |
3124 | */ | |
8798a694 | 3125 | if (do_callback && i->f->dev_loss_tmo_callbk) |
4be98c0c | 3126 | i->f->dev_loss_tmo_callbk(rport); |
1da177e4 | 3127 | } |
1da177e4 | 3128 | |
4be98c0c | 3129 | |
0f29b966 | 3130 | /** |
eb44820c | 3131 | * fc_timeout_fail_rport_io - Timeout handler for a fast io failing on a disconnected SCSI target. |
c4028958 | 3132 | * @work: rport to terminate io on. |
0f29b966 JS |
3133 | * |
3134 | * Notes: Only requests the failure of the io, not that all are flushed | |
3135 | * prior to returning. | |
eb44820c | 3136 | */ |
0f29b966 | 3137 | static void |
c4028958 | 3138 | fc_timeout_fail_rport_io(struct work_struct *work) |
0f29b966 | 3139 | { |
c4028958 DH |
3140 | struct fc_rport *rport = |
3141 | container_of(work, struct fc_rport, fail_io_work.work); | |
0f29b966 JS |
3142 | |
3143 | if (rport->port_state != FC_PORTSTATE_BLOCKED) | |
3144 | return; | |
3145 | ||
fff9d40c MC |
3146 | rport->flags |= FC_RPORT_FAST_FAIL_TIMEDOUT; |
3147 | fc_terminate_rport_io(rport); | |
0f29b966 JS |
3148 | } |
3149 | ||
1da177e4 LT |
3150 | /** |
3151 | * fc_scsi_scan_rport - called to perform a scsi scan on a remote port. | |
c4028958 | 3152 | * @work: remote port to be scanned. |
eb44820c | 3153 | */ |
1da177e4 | 3154 | static void |
c4028958 | 3155 | fc_scsi_scan_rport(struct work_struct *work) |
1da177e4 | 3156 | { |
c4028958 DH |
3157 | struct fc_rport *rport = |
3158 | container_of(work, struct fc_rport, scan_work); | |
aedf3497 | 3159 | struct Scsi_Host *shost = rport_to_shost(rport); |
03f002f7 | 3160 | struct fc_internal *i = to_fc_internal(shost->transportt); |
42e33148 JSEC |
3161 | unsigned long flags; |
3162 | ||
aedf3497 | 3163 | if ((rport->port_state == FC_PORTSTATE_ONLINE) && |
03f002f7 CS |
3164 | (rport->roles & FC_PORT_ROLE_FCP_TARGET) && |
3165 | !(i->f->disable_target_scan)) { | |
aedf3497 JS |
3166 | scsi_scan_target(&rport->dev, rport->channel, |
3167 | rport->scsi_target_id, SCAN_WILD_CARD, 1); | |
42e33148 | 3168 | } |
aedf3497 JS |
3169 | |
3170 | spin_lock_irqsave(shost->host_lock, flags); | |
3171 | rport->flags &= ~FC_RPORT_SCAN_PENDING; | |
42e33148 JSEC |
3172 | spin_unlock_irqrestore(shost->host_lock, flags); |
3173 | } | |
3174 | ||
65d430fa CS |
3175 | /** |
3176 | * fc_block_scsi_eh - Block SCSI eh thread for blocked fc_rport | |
3177 | * @cmnd: SCSI command that scsi_eh is trying to recover | |
3178 | * | |
3179 | * This routine can be called from a FC LLD scsi_eh callback. It | |
3180 | * blocks the scsi_eh thread until the fc_rport leaves the | |
3181 | * FC_PORTSTATE_BLOCKED. This is necessary to avoid the scsi_eh | |
3182 | * failing recovery actions for blocked rports which would lead to | |
3183 | * offlined SCSI devices. | |
3184 | */ | |
3185 | void fc_block_scsi_eh(struct scsi_cmnd *cmnd) | |
3186 | { | |
3187 | struct Scsi_Host *shost = cmnd->device->host; | |
3188 | struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); | |
3189 | unsigned long flags; | |
3190 | ||
3191 | spin_lock_irqsave(shost->host_lock, flags); | |
3192 | while (rport->port_state == FC_PORTSTATE_BLOCKED) { | |
3193 | spin_unlock_irqrestore(shost->host_lock, flags); | |
3194 | msleep(1000); | |
3195 | spin_lock_irqsave(shost->host_lock, flags); | |
3196 | } | |
3197 | spin_unlock_irqrestore(shost->host_lock, flags); | |
3198 | } | |
3199 | EXPORT_SYMBOL(fc_block_scsi_eh); | |
42e33148 | 3200 | |
a53eb5e0 | 3201 | /** |
a30c3f69 | 3202 | * fc_vport_setup - allocates and creates a FC virtual port. |
a53eb5e0 JS |
3203 | * @shost: scsi host the virtual port is connected to. |
3204 | * @channel: Channel on shost port connected to. | |
3205 | * @pdev: parent device for vport | |
3206 | * @ids: The world wide names, FC4 port roles, etc for | |
3207 | * the virtual port. | |
3208 | * @ret_vport: The pointer to the created vport. | |
3209 | * | |
3210 | * Allocates and creates the vport structure, calls the parent host | |
3211 | * to instantiate the vport, the completes w/ class and sysfs creation. | |
3212 | * | |
3213 | * Notes: | |
3214 | * This routine assumes no locks are held on entry. | |
eb44820c | 3215 | */ |
a53eb5e0 | 3216 | static int |
a30c3f69 | 3217 | fc_vport_setup(struct Scsi_Host *shost, int channel, struct device *pdev, |
a53eb5e0 JS |
3218 | struct fc_vport_identifiers *ids, struct fc_vport **ret_vport) |
3219 | { | |
3220 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); | |
3221 | struct fc_internal *fci = to_fc_internal(shost->transportt); | |
3222 | struct fc_vport *vport; | |
3223 | struct device *dev; | |
3224 | unsigned long flags; | |
3225 | size_t size; | |
3226 | int error; | |
3227 | ||
3228 | *ret_vport = NULL; | |
3229 | ||
3230 | if ( ! fci->f->vport_create) | |
3231 | return -ENOENT; | |
3232 | ||
3233 | size = (sizeof(struct fc_vport) + fci->f->dd_fcvport_size); | |
3234 | vport = kzalloc(size, GFP_KERNEL); | |
3235 | if (unlikely(!vport)) { | |
cadbd4a5 | 3236 | printk(KERN_ERR "%s: allocation failure\n", __func__); |
a53eb5e0 JS |
3237 | return -ENOMEM; |
3238 | } | |
3239 | ||
3240 | vport->vport_state = FC_VPORT_UNKNOWN; | |
3241 | vport->vport_last_state = FC_VPORT_UNKNOWN; | |
3242 | vport->node_name = ids->node_name; | |
3243 | vport->port_name = ids->port_name; | |
3244 | vport->roles = ids->roles; | |
3245 | vport->vport_type = ids->vport_type; | |
3246 | if (fci->f->dd_fcvport_size) | |
3247 | vport->dd_data = &vport[1]; | |
3248 | vport->shost = shost; | |
3249 | vport->channel = channel; | |
3250 | vport->flags = FC_VPORT_CREATING; | |
9ef3e4a4 | 3251 | INIT_WORK(&vport->vport_delete_work, fc_vport_sched_delete); |
a53eb5e0 JS |
3252 | |
3253 | spin_lock_irqsave(shost->host_lock, flags); | |
3254 | ||
3255 | if (fc_host->npiv_vports_inuse >= fc_host->max_npiv_vports) { | |
3256 | spin_unlock_irqrestore(shost->host_lock, flags); | |
3257 | kfree(vport); | |
3258 | return -ENOSPC; | |
3259 | } | |
3260 | fc_host->npiv_vports_inuse++; | |
3261 | vport->number = fc_host->next_vport_number++; | |
3262 | list_add_tail(&vport->peers, &fc_host->vports); | |
3263 | get_device(&shost->shost_gendev); /* for fc_host->vport list */ | |
3264 | ||
3265 | spin_unlock_irqrestore(shost->host_lock, flags); | |
3266 | ||
3267 | dev = &vport->dev; | |
3268 | device_initialize(dev); /* takes self reference */ | |
3269 | dev->parent = get_device(pdev); /* takes parent reference */ | |
3270 | dev->release = fc_vport_dev_release; | |
71610f55 KS |
3271 | dev_set_name(dev, "vport-%d:%d-%d", |
3272 | shost->host_no, channel, vport->number); | |
a53eb5e0 JS |
3273 | transport_setup_device(dev); |
3274 | ||
3275 | error = device_add(dev); | |
3276 | if (error) { | |
3277 | printk(KERN_ERR "FC Virtual Port device_add failed\n"); | |
3278 | goto delete_vport; | |
3279 | } | |
3280 | transport_add_device(dev); | |
3281 | transport_configure_device(dev); | |
3282 | ||
3283 | error = fci->f->vport_create(vport, ids->disable); | |
3284 | if (error) { | |
3285 | printk(KERN_ERR "FC Virtual Port LLDD Create failed\n"); | |
3286 | goto delete_vport_all; | |
3287 | } | |
3288 | ||
3289 | /* | |
3290 | * if the parent isn't the physical adapter's Scsi_Host, ensure | |
3291 | * the Scsi_Host at least contains ia symlink to the vport. | |
3292 | */ | |
3293 | if (pdev != &shost->shost_gendev) { | |
3294 | error = sysfs_create_link(&shost->shost_gendev.kobj, | |
71610f55 | 3295 | &dev->kobj, dev_name(dev)); |
a53eb5e0 JS |
3296 | if (error) |
3297 | printk(KERN_ERR | |
3298 | "%s: Cannot create vport symlinks for " | |
3299 | "%s, err=%d\n", | |
71610f55 | 3300 | __func__, dev_name(dev), error); |
a53eb5e0 JS |
3301 | } |
3302 | spin_lock_irqsave(shost->host_lock, flags); | |
3303 | vport->flags &= ~FC_VPORT_CREATING; | |
3304 | spin_unlock_irqrestore(shost->host_lock, flags); | |
3305 | ||
3306 | dev_printk(KERN_NOTICE, pdev, | |
71610f55 | 3307 | "%s created via shost%d channel %d\n", dev_name(dev), |
a53eb5e0 JS |
3308 | shost->host_no, channel); |
3309 | ||
3310 | *ret_vport = vport; | |
3311 | ||
3312 | return 0; | |
3313 | ||
3314 | delete_vport_all: | |
3315 | transport_remove_device(dev); | |
3316 | device_del(dev); | |
3317 | delete_vport: | |
3318 | transport_destroy_device(dev); | |
3319 | spin_lock_irqsave(shost->host_lock, flags); | |
3320 | list_del(&vport->peers); | |
3321 | put_device(&shost->shost_gendev); /* for fc_host->vport list */ | |
3322 | fc_host->npiv_vports_inuse--; | |
3323 | spin_unlock_irqrestore(shost->host_lock, flags); | |
3324 | put_device(dev->parent); | |
3325 | kfree(vport); | |
3326 | ||
3327 | return error; | |
3328 | } | |
3329 | ||
a30c3f69 AV |
3330 | /** |
3331 | * fc_vport_create - Admin App or LLDD requests creation of a vport | |
3332 | * @shost: scsi host the virtual port is connected to. | |
3333 | * @channel: channel on shost port connected to. | |
3334 | * @ids: The world wide names, FC4 port roles, etc for | |
3335 | * the virtual port. | |
3336 | * | |
3337 | * Notes: | |
3338 | * This routine assumes no locks are held on entry. | |
3339 | */ | |
3340 | struct fc_vport * | |
3341 | fc_vport_create(struct Scsi_Host *shost, int channel, | |
3342 | struct fc_vport_identifiers *ids) | |
3343 | { | |
3344 | int stat; | |
3345 | struct fc_vport *vport; | |
3346 | ||
3347 | stat = fc_vport_setup(shost, channel, &shost->shost_gendev, | |
3348 | ids, &vport); | |
3349 | return stat ? NULL : vport; | |
3350 | } | |
3351 | EXPORT_SYMBOL(fc_vport_create); | |
a53eb5e0 JS |
3352 | |
3353 | /** | |
3354 | * fc_vport_terminate - Admin App or LLDD requests termination of a vport | |
3355 | * @vport: fc_vport to be terminated | |
3356 | * | |
3357 | * Calls the LLDD vport_delete() function, then deallocates and removes | |
3358 | * the vport from the shost and object tree. | |
3359 | * | |
3360 | * Notes: | |
3361 | * This routine assumes no locks are held on entry. | |
eb44820c | 3362 | */ |
a53eb5e0 JS |
3363 | int |
3364 | fc_vport_terminate(struct fc_vport *vport) | |
3365 | { | |
3366 | struct Scsi_Host *shost = vport_to_shost(vport); | |
3367 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); | |
3368 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
3369 | struct device *dev = &vport->dev; | |
3370 | unsigned long flags; | |
3371 | int stat; | |
3372 | ||
3373 | spin_lock_irqsave(shost->host_lock, flags); | |
3374 | if (vport->flags & FC_VPORT_CREATING) { | |
3375 | spin_unlock_irqrestore(shost->host_lock, flags); | |
3376 | return -EBUSY; | |
3377 | } | |
3378 | if (vport->flags & (FC_VPORT_DEL)) { | |
3379 | spin_unlock_irqrestore(shost->host_lock, flags); | |
3380 | return -EALREADY; | |
3381 | } | |
3382 | vport->flags |= FC_VPORT_DELETING; | |
3383 | spin_unlock_irqrestore(shost->host_lock, flags); | |
3384 | ||
3385 | if (i->f->vport_delete) | |
3386 | stat = i->f->vport_delete(vport); | |
3387 | else | |
3388 | stat = -ENOENT; | |
3389 | ||
3390 | spin_lock_irqsave(shost->host_lock, flags); | |
3391 | vport->flags &= ~FC_VPORT_DELETING; | |
3392 | if (!stat) { | |
3393 | vport->flags |= FC_VPORT_DELETED; | |
3394 | list_del(&vport->peers); | |
3395 | fc_host->npiv_vports_inuse--; | |
3396 | put_device(&shost->shost_gendev); /* for fc_host->vport list */ | |
3397 | } | |
3398 | spin_unlock_irqrestore(shost->host_lock, flags); | |
3399 | ||
3400 | if (stat) | |
3401 | return stat; | |
3402 | ||
3403 | if (dev->parent != &shost->shost_gendev) | |
71610f55 | 3404 | sysfs_remove_link(&shost->shost_gendev.kobj, dev_name(dev)); |
a53eb5e0 JS |
3405 | transport_remove_device(dev); |
3406 | device_del(dev); | |
3407 | transport_destroy_device(dev); | |
3408 | ||
3409 | /* | |
3410 | * Removing our self-reference should mean our | |
3411 | * release function gets called, which will drop the remaining | |
3412 | * parent reference and free the data structure. | |
3413 | */ | |
3414 | put_device(dev); /* for self-reference */ | |
3415 | ||
3416 | return 0; /* SUCCESS */ | |
3417 | } | |
3418 | EXPORT_SYMBOL(fc_vport_terminate); | |
3419 | ||
9ef3e4a4 JS |
3420 | /** |
3421 | * fc_vport_sched_delete - workq-based delete request for a vport | |
9ef3e4a4 | 3422 | * @work: vport to be deleted. |
eb44820c | 3423 | */ |
9ef3e4a4 JS |
3424 | static void |
3425 | fc_vport_sched_delete(struct work_struct *work) | |
3426 | { | |
3427 | struct fc_vport *vport = | |
3428 | container_of(work, struct fc_vport, vport_delete_work); | |
3429 | int stat; | |
3430 | ||
3431 | stat = fc_vport_terminate(vport); | |
3432 | if (stat) | |
3433 | dev_printk(KERN_ERR, vport->dev.parent, | |
3434 | "%s: %s could not be deleted created via " | |
cadbd4a5 | 3435 | "shost%d channel %d - error %d\n", __func__, |
71610f55 | 3436 | dev_name(&vport->dev), vport->shost->host_no, |
9ef3e4a4 JS |
3437 | vport->channel, stat); |
3438 | } | |
3439 | ||
a53eb5e0 | 3440 | |
9e4f5e29 JS |
3441 | /* |
3442 | * BSG support | |
3443 | */ | |
3444 | ||
3445 | ||
3446 | /** | |
3447 | * fc_destroy_bsgjob - routine to teardown/delete a fc bsg job | |
3448 | * @job: fc_bsg_job that is to be torn down | |
3449 | */ | |
3450 | static void | |
3451 | fc_destroy_bsgjob(struct fc_bsg_job *job) | |
3452 | { | |
3453 | unsigned long flags; | |
3454 | ||
3455 | spin_lock_irqsave(&job->job_lock, flags); | |
3456 | if (job->ref_cnt) { | |
3457 | spin_unlock_irqrestore(&job->job_lock, flags); | |
3458 | return; | |
3459 | } | |
3460 | spin_unlock_irqrestore(&job->job_lock, flags); | |
3461 | ||
3462 | put_device(job->dev); /* release reference for the request */ | |
3463 | ||
3464 | kfree(job->request_payload.sg_list); | |
3465 | kfree(job->reply_payload.sg_list); | |
3466 | kfree(job); | |
3467 | } | |
3468 | ||
9e4f5e29 JS |
3469 | /** |
3470 | * fc_bsg_jobdone - completion routine for bsg requests that the LLD has | |
3471 | * completed | |
3472 | * @job: fc_bsg_job that is complete | |
3473 | */ | |
3474 | static void | |
3475 | fc_bsg_jobdone(struct fc_bsg_job *job) | |
3476 | { | |
3477 | struct request *req = job->req; | |
3478 | struct request *rsp = req->next_rq; | |
9e4f5e29 JS |
3479 | int err; |
3480 | ||
9e4f5e29 | 3481 | err = job->req->errors = job->reply->result; |
b5c6f776 | 3482 | |
9e4f5e29 JS |
3483 | if (err < 0) |
3484 | /* we're only returning the result field in the reply */ | |
3485 | job->req->sense_len = sizeof(uint32_t); | |
3486 | else | |
3487 | job->req->sense_len = job->reply_len; | |
3488 | ||
3489 | /* we assume all request payload was transferred, residual == 0 */ | |
3490 | req->resid_len = 0; | |
3491 | ||
3492 | if (rsp) { | |
3493 | WARN_ON(job->reply->reply_payload_rcv_len > rsp->resid_len); | |
3494 | ||
3495 | /* set reply (bidi) residual */ | |
3496 | rsp->resid_len -= min(job->reply->reply_payload_rcv_len, | |
3497 | rsp->resid_len); | |
3498 | } | |
b5c6f776 GM |
3499 | blk_complete_request(req); |
3500 | } | |
3501 | ||
3502 | /** | |
3503 | * fc_bsg_softirq_done - softirq done routine for destroying the bsg requests | |
fe5d20c8 | 3504 | * @rq: BSG request that holds the job to be destroyed |
b5c6f776 GM |
3505 | */ |
3506 | static void fc_bsg_softirq_done(struct request *rq) | |
3507 | { | |
3508 | struct fc_bsg_job *job = rq->special; | |
3509 | unsigned long flags; | |
9e4f5e29 | 3510 | |
b5c6f776 GM |
3511 | spin_lock_irqsave(&job->job_lock, flags); |
3512 | job->state_flags |= FC_RQST_STATE_DONE; | |
3513 | job->ref_cnt--; | |
3514 | spin_unlock_irqrestore(&job->job_lock, flags); | |
9e4f5e29 | 3515 | |
b5c6f776 | 3516 | blk_end_request_all(rq, rq->errors); |
9e4f5e29 JS |
3517 | fc_destroy_bsgjob(job); |
3518 | } | |
3519 | ||
9e4f5e29 JS |
3520 | /** |
3521 | * fc_bsg_job_timeout - handler for when a bsg request timesout | |
3522 | * @req: request that timed out | |
3523 | */ | |
3524 | static enum blk_eh_timer_return | |
3525 | fc_bsg_job_timeout(struct request *req) | |
3526 | { | |
3527 | struct fc_bsg_job *job = (void *) req->special; | |
3528 | struct Scsi_Host *shost = job->shost; | |
3529 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
3530 | unsigned long flags; | |
3531 | int err = 0, done = 0; | |
3532 | ||
3533 | if (job->rport && job->rport->port_state == FC_PORTSTATE_BLOCKED) | |
3534 | return BLK_EH_RESET_TIMER; | |
3535 | ||
3536 | spin_lock_irqsave(&job->job_lock, flags); | |
3537 | if (job->state_flags & FC_RQST_STATE_DONE) | |
3538 | done = 1; | |
3539 | else | |
3540 | job->ref_cnt++; | |
3541 | spin_unlock_irqrestore(&job->job_lock, flags); | |
3542 | ||
3543 | if (!done && i->f->bsg_timeout) { | |
3544 | /* call LLDD to abort the i/o as it has timed out */ | |
3545 | err = i->f->bsg_timeout(job); | |
b8f08645 SS |
3546 | if (err == -EAGAIN) { |
3547 | job->ref_cnt--; | |
3548 | return BLK_EH_RESET_TIMER; | |
3549 | } else if (err) | |
9e4f5e29 JS |
3550 | printk(KERN_ERR "ERROR: FC BSG request timeout - LLD " |
3551 | "abort failed with status %d\n", err); | |
3552 | } | |
3553 | ||
9e4f5e29 | 3554 | /* the blk_end_sync_io() doesn't check the error */ |
47e7e89e GM |
3555 | if (done) |
3556 | return BLK_EH_NOT_HANDLED; | |
3557 | else | |
3558 | return BLK_EH_HANDLED; | |
9e4f5e29 JS |
3559 | } |
3560 | ||
9e4f5e29 JS |
3561 | static int |
3562 | fc_bsg_map_buffer(struct fc_bsg_buffer *buf, struct request *req) | |
3563 | { | |
3564 | size_t sz = (sizeof(struct scatterlist) * req->nr_phys_segments); | |
3565 | ||
3566 | BUG_ON(!req->nr_phys_segments); | |
3567 | ||
3568 | buf->sg_list = kzalloc(sz, GFP_KERNEL); | |
3569 | if (!buf->sg_list) | |
3570 | return -ENOMEM; | |
3571 | sg_init_table(buf->sg_list, req->nr_phys_segments); | |
3572 | buf->sg_cnt = blk_rq_map_sg(req->q, req, buf->sg_list); | |
3573 | buf->payload_len = blk_rq_bytes(req); | |
3574 | return 0; | |
3575 | } | |
3576 | ||
3577 | ||
3578 | /** | |
3579 | * fc_req_to_bsgjob - Allocate/create the fc_bsg_job structure for the | |
3580 | * bsg request | |
3581 | * @shost: SCSI Host corresponding to the bsg object | |
3582 | * @rport: (optional) FC Remote Port corresponding to the bsg object | |
3583 | * @req: BSG request that needs a job structure | |
3584 | */ | |
3585 | static int | |
3586 | fc_req_to_bsgjob(struct Scsi_Host *shost, struct fc_rport *rport, | |
3587 | struct request *req) | |
3588 | { | |
3589 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
3590 | struct request *rsp = req->next_rq; | |
3591 | struct fc_bsg_job *job; | |
3592 | int ret; | |
3593 | ||
3594 | BUG_ON(req->special); | |
3595 | ||
3596 | job = kzalloc(sizeof(struct fc_bsg_job) + i->f->dd_bsg_size, | |
3597 | GFP_KERNEL); | |
3598 | if (!job) | |
3599 | return -ENOMEM; | |
3600 | ||
3601 | /* | |
3602 | * Note: this is a bit silly. | |
3603 | * The request gets formatted as a SGIO v4 ioctl request, which | |
3604 | * then gets reformatted as a blk request, which then gets | |
3605 | * reformatted as a fc bsg request. And on completion, we have | |
3606 | * to wrap return results such that SGIO v4 thinks it was a scsi | |
3607 | * status. I hope this was all worth it. | |
3608 | */ | |
3609 | ||
3610 | req->special = job; | |
3611 | job->shost = shost; | |
3612 | job->rport = rport; | |
3613 | job->req = req; | |
3614 | if (i->f->dd_bsg_size) | |
3615 | job->dd_data = (void *)&job[1]; | |
3616 | spin_lock_init(&job->job_lock); | |
3617 | job->request = (struct fc_bsg_request *)req->cmd; | |
3618 | job->request_len = req->cmd_len; | |
3619 | job->reply = req->sense; | |
3620 | job->reply_len = SCSI_SENSE_BUFFERSIZE; /* Size of sense buffer | |
3621 | * allocated */ | |
3622 | if (req->bio) { | |
3623 | ret = fc_bsg_map_buffer(&job->request_payload, req); | |
3624 | if (ret) | |
3625 | goto failjob_rls_job; | |
3626 | } | |
3627 | if (rsp && rsp->bio) { | |
3628 | ret = fc_bsg_map_buffer(&job->reply_payload, rsp); | |
3629 | if (ret) | |
3630 | goto failjob_rls_rqst_payload; | |
3631 | } | |
3632 | job->job_done = fc_bsg_jobdone; | |
3633 | if (rport) | |
3634 | job->dev = &rport->dev; | |
3635 | else | |
3636 | job->dev = &shost->shost_gendev; | |
3637 | get_device(job->dev); /* take a reference for the request */ | |
3638 | ||
3639 | job->ref_cnt = 1; | |
3640 | ||
3641 | return 0; | |
3642 | ||
3643 | ||
3644 | failjob_rls_rqst_payload: | |
3645 | kfree(job->request_payload.sg_list); | |
3646 | failjob_rls_job: | |
3647 | kfree(job); | |
3648 | return -ENOMEM; | |
3649 | } | |
3650 | ||
3651 | ||
3652 | enum fc_dispatch_result { | |
3653 | FC_DISPATCH_BREAK, /* on return, q is locked, break from q loop */ | |
3654 | FC_DISPATCH_LOCKED, /* on return, q is locked, continue on */ | |
3655 | FC_DISPATCH_UNLOCKED, /* on return, q is unlocked, continue on */ | |
3656 | }; | |
3657 | ||
3658 | ||
3659 | /** | |
3660 | * fc_bsg_host_dispatch - process fc host bsg requests and dispatch to LLDD | |
5415907a | 3661 | * @q: fc host request queue |
9e4f5e29 JS |
3662 | * @shost: scsi host rport attached to |
3663 | * @job: bsg job to be processed | |
3664 | */ | |
3665 | static enum fc_dispatch_result | |
3666 | fc_bsg_host_dispatch(struct request_queue *q, struct Scsi_Host *shost, | |
3667 | struct fc_bsg_job *job) | |
3668 | { | |
3669 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
3670 | int cmdlen = sizeof(uint32_t); /* start with length of msgcode */ | |
3671 | int ret; | |
3672 | ||
3673 | /* Validate the host command */ | |
3674 | switch (job->request->msgcode) { | |
3675 | case FC_BSG_HST_ADD_RPORT: | |
3676 | cmdlen += sizeof(struct fc_bsg_host_add_rport); | |
3677 | break; | |
3678 | ||
3679 | case FC_BSG_HST_DEL_RPORT: | |
3680 | cmdlen += sizeof(struct fc_bsg_host_del_rport); | |
3681 | break; | |
3682 | ||
3683 | case FC_BSG_HST_ELS_NOLOGIN: | |
3684 | cmdlen += sizeof(struct fc_bsg_host_els); | |
3685 | /* there better be a xmt and rcv payloads */ | |
3686 | if ((!job->request_payload.payload_len) || | |
3687 | (!job->reply_payload.payload_len)) { | |
3688 | ret = -EINVAL; | |
3689 | goto fail_host_msg; | |
3690 | } | |
3691 | break; | |
3692 | ||
3693 | case FC_BSG_HST_CT: | |
3694 | cmdlen += sizeof(struct fc_bsg_host_ct); | |
3695 | /* there better be xmt and rcv payloads */ | |
3696 | if ((!job->request_payload.payload_len) || | |
3697 | (!job->reply_payload.payload_len)) { | |
3698 | ret = -EINVAL; | |
3699 | goto fail_host_msg; | |
3700 | } | |
3701 | break; | |
3702 | ||
3703 | case FC_BSG_HST_VENDOR: | |
3704 | cmdlen += sizeof(struct fc_bsg_host_vendor); | |
3705 | if ((shost->hostt->vendor_id == 0L) || | |
3706 | (job->request->rqst_data.h_vendor.vendor_id != | |
3707 | shost->hostt->vendor_id)) { | |
3708 | ret = -ESRCH; | |
3709 | goto fail_host_msg; | |
3710 | } | |
3711 | break; | |
3712 | ||
3713 | default: | |
3714 | ret = -EBADR; | |
3715 | goto fail_host_msg; | |
3716 | } | |
3717 | ||
3718 | /* check if we really have all the request data needed */ | |
3719 | if (job->request_len < cmdlen) { | |
3720 | ret = -ENOMSG; | |
3721 | goto fail_host_msg; | |
3722 | } | |
3723 | ||
3724 | ret = i->f->bsg_request(job); | |
3725 | if (!ret) | |
3726 | return FC_DISPATCH_UNLOCKED; | |
3727 | ||
3728 | fail_host_msg: | |
3729 | /* return the errno failure code as the only status */ | |
3730 | BUG_ON(job->reply_len < sizeof(uint32_t)); | |
61ec33eb | 3731 | job->reply->reply_payload_rcv_len = 0; |
9e4f5e29 JS |
3732 | job->reply->result = ret; |
3733 | job->reply_len = sizeof(uint32_t); | |
3734 | fc_bsg_jobdone(job); | |
3735 | return FC_DISPATCH_UNLOCKED; | |
3736 | } | |
3737 | ||
3738 | ||
3739 | /* | |
3740 | * fc_bsg_goose_queue - restart rport queue in case it was stopped | |
3741 | * @rport: rport to be restarted | |
3742 | */ | |
3743 | static void | |
3744 | fc_bsg_goose_queue(struct fc_rport *rport) | |
3745 | { | |
3746 | int flagset; | |
39562e78 | 3747 | unsigned long flags; |
9e4f5e29 JS |
3748 | |
3749 | if (!rport->rqst_q) | |
3750 | return; | |
3751 | ||
3752 | get_device(&rport->dev); | |
3753 | ||
39562e78 | 3754 | spin_lock_irqsave(rport->rqst_q->queue_lock, flags); |
9e4f5e29 JS |
3755 | flagset = test_bit(QUEUE_FLAG_REENTER, &rport->rqst_q->queue_flags) && |
3756 | !test_bit(QUEUE_FLAG_REENTER, &rport->rqst_q->queue_flags); | |
3757 | if (flagset) | |
3758 | queue_flag_set(QUEUE_FLAG_REENTER, rport->rqst_q); | |
3759 | __blk_run_queue(rport->rqst_q); | |
3760 | if (flagset) | |
3761 | queue_flag_clear(QUEUE_FLAG_REENTER, rport->rqst_q); | |
39562e78 | 3762 | spin_unlock_irqrestore(rport->rqst_q->queue_lock, flags); |
9e4f5e29 JS |
3763 | |
3764 | put_device(&rport->dev); | |
3765 | } | |
3766 | ||
3767 | ||
3768 | /** | |
3769 | * fc_bsg_rport_dispatch - process rport bsg requests and dispatch to LLDD | |
5415907a | 3770 | * @q: rport request queue |
9e4f5e29 JS |
3771 | * @shost: scsi host rport attached to |
3772 | * @rport: rport request destined to | |
3773 | * @job: bsg job to be processed | |
3774 | */ | |
3775 | static enum fc_dispatch_result | |
3776 | fc_bsg_rport_dispatch(struct request_queue *q, struct Scsi_Host *shost, | |
3777 | struct fc_rport *rport, struct fc_bsg_job *job) | |
3778 | { | |
3779 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
3780 | int cmdlen = sizeof(uint32_t); /* start with length of msgcode */ | |
3781 | int ret; | |
3782 | ||
3783 | /* Validate the rport command */ | |
3784 | switch (job->request->msgcode) { | |
3785 | case FC_BSG_RPT_ELS: | |
3786 | cmdlen += sizeof(struct fc_bsg_rport_els); | |
3787 | goto check_bidi; | |
3788 | ||
3789 | case FC_BSG_RPT_CT: | |
3790 | cmdlen += sizeof(struct fc_bsg_rport_ct); | |
3791 | check_bidi: | |
3792 | /* there better be xmt and rcv payloads */ | |
3793 | if ((!job->request_payload.payload_len) || | |
3794 | (!job->reply_payload.payload_len)) { | |
3795 | ret = -EINVAL; | |
3796 | goto fail_rport_msg; | |
3797 | } | |
3798 | break; | |
3799 | default: | |
3800 | ret = -EBADR; | |
3801 | goto fail_rport_msg; | |
3802 | } | |
3803 | ||
3804 | /* check if we really have all the request data needed */ | |
3805 | if (job->request_len < cmdlen) { | |
3806 | ret = -ENOMSG; | |
3807 | goto fail_rport_msg; | |
3808 | } | |
3809 | ||
3810 | ret = i->f->bsg_request(job); | |
3811 | if (!ret) | |
3812 | return FC_DISPATCH_UNLOCKED; | |
3813 | ||
3814 | fail_rport_msg: | |
3815 | /* return the errno failure code as the only status */ | |
3816 | BUG_ON(job->reply_len < sizeof(uint32_t)); | |
61ec33eb | 3817 | job->reply->reply_payload_rcv_len = 0; |
9e4f5e29 JS |
3818 | job->reply->result = ret; |
3819 | job->reply_len = sizeof(uint32_t); | |
3820 | fc_bsg_jobdone(job); | |
3821 | return FC_DISPATCH_UNLOCKED; | |
3822 | } | |
3823 | ||
3824 | ||
3825 | /** | |
3826 | * fc_bsg_request_handler - generic handler for bsg requests | |
3827 | * @q: request queue to manage | |
3828 | * @shost: Scsi_Host related to the bsg object | |
3829 | * @rport: FC remote port related to the bsg object (optional) | |
3830 | * @dev: device structure for bsg object | |
3831 | */ | |
3832 | static void | |
3833 | fc_bsg_request_handler(struct request_queue *q, struct Scsi_Host *shost, | |
3834 | struct fc_rport *rport, struct device *dev) | |
3835 | { | |
3836 | struct request *req; | |
3837 | struct fc_bsg_job *job; | |
3838 | enum fc_dispatch_result ret; | |
3839 | ||
3840 | if (!get_device(dev)) | |
3841 | return; | |
3842 | ||
3843 | while (!blk_queue_plugged(q)) { | |
2bc1c59d MC |
3844 | if (rport && (rport->port_state == FC_PORTSTATE_BLOCKED) && |
3845 | !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)) | |
3846 | break; | |
9e4f5e29 JS |
3847 | |
3848 | req = blk_fetch_request(q); | |
3849 | if (!req) | |
3850 | break; | |
3851 | ||
3852 | if (rport && (rport->port_state != FC_PORTSTATE_ONLINE)) { | |
3853 | req->errors = -ENXIO; | |
3854 | spin_unlock_irq(q->queue_lock); | |
3855 | blk_end_request(req, -ENXIO, blk_rq_bytes(req)); | |
3856 | spin_lock_irq(q->queue_lock); | |
3857 | continue; | |
3858 | } | |
3859 | ||
3860 | spin_unlock_irq(q->queue_lock); | |
3861 | ||
3862 | ret = fc_req_to_bsgjob(shost, rport, req); | |
3863 | if (ret) { | |
3864 | req->errors = ret; | |
3865 | blk_end_request(req, ret, blk_rq_bytes(req)); | |
3866 | spin_lock_irq(q->queue_lock); | |
3867 | continue; | |
3868 | } | |
3869 | ||
3870 | job = req->special; | |
3871 | ||
3872 | /* check if we have the msgcode value at least */ | |
3873 | if (job->request_len < sizeof(uint32_t)) { | |
3874 | BUG_ON(job->reply_len < sizeof(uint32_t)); | |
61ec33eb | 3875 | job->reply->reply_payload_rcv_len = 0; |
9e4f5e29 JS |
3876 | job->reply->result = -ENOMSG; |
3877 | job->reply_len = sizeof(uint32_t); | |
3878 | fc_bsg_jobdone(job); | |
3879 | spin_lock_irq(q->queue_lock); | |
3880 | continue; | |
3881 | } | |
3882 | ||
3883 | /* the dispatch routines will unlock the queue_lock */ | |
3884 | if (rport) | |
3885 | ret = fc_bsg_rport_dispatch(q, shost, rport, job); | |
3886 | else | |
3887 | ret = fc_bsg_host_dispatch(q, shost, job); | |
3888 | ||
3889 | /* did dispatcher hit state that can't process any more */ | |
3890 | if (ret == FC_DISPATCH_BREAK) | |
3891 | break; | |
3892 | ||
3893 | /* did dispatcher had released the lock */ | |
3894 | if (ret == FC_DISPATCH_UNLOCKED) | |
3895 | spin_lock_irq(q->queue_lock); | |
3896 | } | |
3897 | ||
3898 | spin_unlock_irq(q->queue_lock); | |
3899 | put_device(dev); | |
3900 | spin_lock_irq(q->queue_lock); | |
3901 | } | |
3902 | ||
3903 | ||
3904 | /** | |
3905 | * fc_bsg_host_handler - handler for bsg requests for a fc host | |
3906 | * @q: fc host request queue | |
3907 | */ | |
3908 | static void | |
3909 | fc_bsg_host_handler(struct request_queue *q) | |
3910 | { | |
3911 | struct Scsi_Host *shost = q->queuedata; | |
3912 | ||
3913 | fc_bsg_request_handler(q, shost, NULL, &shost->shost_gendev); | |
3914 | } | |
3915 | ||
3916 | ||
3917 | /** | |
3918 | * fc_bsg_rport_handler - handler for bsg requests for a fc rport | |
3919 | * @q: rport request queue | |
3920 | */ | |
3921 | static void | |
3922 | fc_bsg_rport_handler(struct request_queue *q) | |
3923 | { | |
3924 | struct fc_rport *rport = q->queuedata; | |
3925 | struct Scsi_Host *shost = rport_to_shost(rport); | |
3926 | ||
3927 | fc_bsg_request_handler(q, shost, rport, &rport->dev); | |
3928 | } | |
3929 | ||
3930 | ||
3931 | /** | |
3932 | * fc_bsg_hostadd - Create and add the bsg hooks so we can receive requests | |
3933 | * @shost: shost for fc_host | |
3934 | * @fc_host: fc_host adding the structures to | |
3935 | */ | |
3936 | static int | |
3937 | fc_bsg_hostadd(struct Scsi_Host *shost, struct fc_host_attrs *fc_host) | |
3938 | { | |
3939 | struct device *dev = &shost->shost_gendev; | |
3940 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
3941 | struct request_queue *q; | |
3942 | int err; | |
3c559ea8 | 3943 | char bsg_name[20]; |
9e4f5e29 JS |
3944 | |
3945 | fc_host->rqst_q = NULL; | |
3946 | ||
3947 | if (!i->f->bsg_request) | |
3948 | return -ENOTSUPP; | |
3949 | ||
3950 | snprintf(bsg_name, sizeof(bsg_name), | |
3951 | "fc_host%d", shost->host_no); | |
3952 | ||
3953 | q = __scsi_alloc_queue(shost, fc_bsg_host_handler); | |
3954 | if (!q) { | |
3955 | printk(KERN_ERR "fc_host%d: bsg interface failed to " | |
3956 | "initialize - no request queue\n", | |
3957 | shost->host_no); | |
3958 | return -ENOMEM; | |
3959 | } | |
3960 | ||
3961 | q->queuedata = shost; | |
3962 | queue_flag_set_unlocked(QUEUE_FLAG_BIDI, q); | |
b5c6f776 | 3963 | blk_queue_softirq_done(q, fc_bsg_softirq_done); |
9e4f5e29 JS |
3964 | blk_queue_rq_timed_out(q, fc_bsg_job_timeout); |
3965 | blk_queue_rq_timeout(q, FC_DEFAULT_BSG_TIMEOUT); | |
3966 | ||
3967 | err = bsg_register_queue(q, dev, bsg_name, NULL); | |
3968 | if (err) { | |
3969 | printk(KERN_ERR "fc_host%d: bsg interface failed to " | |
3970 | "initialize - register queue\n", | |
3971 | shost->host_no); | |
3972 | blk_cleanup_queue(q); | |
3973 | return err; | |
3974 | } | |
3975 | ||
3976 | fc_host->rqst_q = q; | |
3977 | return 0; | |
3978 | } | |
3979 | ||
3980 | ||
3981 | /** | |
3982 | * fc_bsg_rportadd - Create and add the bsg hooks so we can receive requests | |
3983 | * @shost: shost that rport is attached to | |
3984 | * @rport: rport that the bsg hooks are being attached to | |
3985 | */ | |
3986 | static int | |
3987 | fc_bsg_rportadd(struct Scsi_Host *shost, struct fc_rport *rport) | |
3988 | { | |
3989 | struct device *dev = &rport->dev; | |
3990 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
3991 | struct request_queue *q; | |
3992 | int err; | |
3993 | ||
3994 | rport->rqst_q = NULL; | |
3995 | ||
3996 | if (!i->f->bsg_request) | |
3997 | return -ENOTSUPP; | |
3998 | ||
3999 | q = __scsi_alloc_queue(shost, fc_bsg_rport_handler); | |
4000 | if (!q) { | |
4001 | printk(KERN_ERR "%s: bsg interface failed to " | |
4002 | "initialize - no request queue\n", | |
4003 | dev->kobj.name); | |
4004 | return -ENOMEM; | |
4005 | } | |
4006 | ||
4007 | q->queuedata = rport; | |
4008 | queue_flag_set_unlocked(QUEUE_FLAG_BIDI, q); | |
b5c6f776 | 4009 | blk_queue_softirq_done(q, fc_bsg_softirq_done); |
9e4f5e29 JS |
4010 | blk_queue_rq_timed_out(q, fc_bsg_job_timeout); |
4011 | blk_queue_rq_timeout(q, BLK_DEFAULT_SG_TIMEOUT); | |
4012 | ||
4013 | err = bsg_register_queue(q, dev, NULL, NULL); | |
4014 | if (err) { | |
4015 | printk(KERN_ERR "%s: bsg interface failed to " | |
4016 | "initialize - register queue\n", | |
4017 | dev->kobj.name); | |
4018 | blk_cleanup_queue(q); | |
4019 | return err; | |
4020 | } | |
4021 | ||
4022 | rport->rqst_q = q; | |
4023 | return 0; | |
4024 | } | |
4025 | ||
4026 | ||
4027 | /** | |
4028 | * fc_bsg_remove - Deletes the bsg hooks on fchosts/rports | |
4029 | * @q: the request_queue that is to be torn down. | |
4030 | */ | |
4031 | static void | |
4032 | fc_bsg_remove(struct request_queue *q) | |
4033 | { | |
4034 | if (q) { | |
4035 | bsg_unregister_queue(q); | |
4036 | blk_cleanup_queue(q); | |
4037 | } | |
4038 | } | |
4039 | ||
4040 | ||
9ef3e4a4 JS |
4041 | /* Original Author: Martin Hicks */ |
4042 | MODULE_AUTHOR("James Smart"); | |
1da177e4 LT |
4043 | MODULE_DESCRIPTION("FC Transport Attributes"); |
4044 | MODULE_LICENSE("GPL"); | |
4045 | ||
4046 | module_init(fc_transport_init); | |
4047 | module_exit(fc_transport_exit); |