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