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