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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> | |
30 | #include <scsi/scsi_device.h> | |
31 | #include <scsi/scsi_host.h> | |
32 | #include <scsi/scsi_transport.h> | |
33 | #include <scsi/scsi_transport_fc.h> | |
c829c394 | 34 | #include <scsi/scsi_cmnd.h> |
84314fd4 JS |
35 | #include <linux/netlink.h> |
36 | #include <net/netlink.h> | |
37 | #include <scsi/scsi_netlink_fc.h> | |
1da177e4 LT |
38 | #include "scsi_priv.h" |
39 | ||
aedf3497 | 40 | static int fc_queue_work(struct Scsi_Host *, struct work_struct *); |
9ef3e4a4 | 41 | static void fc_vport_sched_delete(struct work_struct *work); |
aedf3497 | 42 | |
a53eb5e0 JS |
43 | /* |
44 | * This is a temporary carrier for creating a vport. It will eventually | |
45 | * be replaced by a real message definition for sgio or netlink. | |
46 | * | |
47 | * fc_vport_identifiers: This set of data contains all elements | |
48 | * to uniquely identify and instantiate a FC virtual port. | |
49 | * | |
50 | * Notes: | |
51 | * symbolic_name: The driver is to append the symbolic_name string data | |
52 | * to the symbolic_node_name data that it generates by default. | |
53 | * the resulting combination should then be registered with the switch. | |
54 | * It is expected that things like Xen may stuff a VM title into | |
55 | * this field. | |
56 | */ | |
57 | struct fc_vport_identifiers { | |
58 | u64 node_name; | |
59 | u64 port_name; | |
60 | u32 roles; | |
61 | bool disable; | |
62 | enum fc_port_type vport_type; /* only FC_PORTTYPE_NPIV allowed */ | |
63 | char symbolic_name[FC_VPORT_SYMBOLIC_NAMELEN]; | |
64 | }; | |
65 | ||
66 | static int fc_vport_create(struct Scsi_Host *shost, int channel, | |
67 | struct device *pdev, struct fc_vport_identifiers *ids, | |
68 | struct fc_vport **vport); | |
69 | ||
1da177e4 LT |
70 | /* |
71 | * Redefine so that we can have same named attributes in the | |
72 | * sdev/starget/host objects. | |
73 | */ | |
74 | #define FC_CLASS_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \ | |
75 | struct class_device_attribute class_device_attr_##_prefix##_##_name = \ | |
76 | __ATTR(_name,_mode,_show,_store) | |
77 | ||
78 | #define fc_enum_name_search(title, table_type, table) \ | |
79 | static const char *get_fc_##title##_name(enum table_type table_key) \ | |
80 | { \ | |
81 | int i; \ | |
82 | char *name = NULL; \ | |
83 | \ | |
6391a113 | 84 | for (i = 0; i < ARRAY_SIZE(table); i++) { \ |
1da177e4 LT |
85 | if (table[i].value == table_key) { \ |
86 | name = table[i].name; \ | |
87 | break; \ | |
88 | } \ | |
89 | } \ | |
90 | return name; \ | |
91 | } | |
92 | ||
93 | #define fc_enum_name_match(title, table_type, table) \ | |
94 | static int get_fc_##title##_match(const char *table_key, \ | |
95 | enum table_type *value) \ | |
96 | { \ | |
97 | int i; \ | |
98 | \ | |
6391a113 | 99 | for (i = 0; i < ARRAY_SIZE(table); i++) { \ |
1da177e4 LT |
100 | if (strncmp(table_key, table[i].name, \ |
101 | table[i].matchlen) == 0) { \ | |
102 | *value = table[i].value; \ | |
103 | return 0; /* success */ \ | |
104 | } \ | |
105 | } \ | |
106 | return 1; /* failure */ \ | |
107 | } | |
108 | ||
109 | ||
110 | /* Convert fc_port_type values to ascii string name */ | |
111 | static struct { | |
112 | enum fc_port_type value; | |
113 | char *name; | |
114 | } fc_port_type_names[] = { | |
115 | { FC_PORTTYPE_UNKNOWN, "Unknown" }, | |
116 | { FC_PORTTYPE_OTHER, "Other" }, | |
117 | { FC_PORTTYPE_NOTPRESENT, "Not Present" }, | |
118 | { FC_PORTTYPE_NPORT, "NPort (fabric via point-to-point)" }, | |
119 | { FC_PORTTYPE_NLPORT, "NLPort (fabric via loop)" }, | |
120 | { FC_PORTTYPE_LPORT, "LPort (private loop)" }, | |
121 | { FC_PORTTYPE_PTP, "Point-To-Point (direct nport connection" }, | |
a53eb5e0 | 122 | { FC_PORTTYPE_NPIV, "NPIV VPORT" }, |
1da177e4 LT |
123 | }; |
124 | fc_enum_name_search(port_type, fc_port_type, fc_port_type_names) | |
125 | #define FC_PORTTYPE_MAX_NAMELEN 50 | |
126 | ||
a53eb5e0 JS |
127 | /* Reuse fc_port_type enum function for vport_type */ |
128 | #define get_fc_vport_type_name get_fc_port_type_name | |
129 | ||
1da177e4 | 130 | |
84314fd4 JS |
131 | /* Convert fc_host_event_code values to ascii string name */ |
132 | static const struct { | |
133 | enum fc_host_event_code value; | |
134 | char *name; | |
135 | } fc_host_event_code_names[] = { | |
136 | { FCH_EVT_LIP, "lip" }, | |
137 | { FCH_EVT_LINKUP, "link_up" }, | |
138 | { FCH_EVT_LINKDOWN, "link_down" }, | |
139 | { FCH_EVT_LIPRESET, "lip_reset" }, | |
140 | { FCH_EVT_RSCN, "rscn" }, | |
141 | { FCH_EVT_ADAPTER_CHANGE, "adapter_chg" }, | |
142 | { FCH_EVT_PORT_UNKNOWN, "port_unknown" }, | |
143 | { FCH_EVT_PORT_ONLINE, "port_online" }, | |
144 | { FCH_EVT_PORT_OFFLINE, "port_offline" }, | |
145 | { FCH_EVT_PORT_FABRIC, "port_fabric" }, | |
146 | { FCH_EVT_LINK_UNKNOWN, "link_unknown" }, | |
147 | { FCH_EVT_VENDOR_UNIQUE, "vendor_unique" }, | |
148 | }; | |
149 | fc_enum_name_search(host_event_code, fc_host_event_code, | |
150 | fc_host_event_code_names) | |
151 | #define FC_HOST_EVENT_CODE_MAX_NAMELEN 30 | |
152 | ||
153 | ||
1da177e4 LT |
154 | /* Convert fc_port_state values to ascii string name */ |
155 | static struct { | |
156 | enum fc_port_state value; | |
157 | char *name; | |
158 | } fc_port_state_names[] = { | |
159 | { FC_PORTSTATE_UNKNOWN, "Unknown" }, | |
160 | { FC_PORTSTATE_NOTPRESENT, "Not Present" }, | |
161 | { FC_PORTSTATE_ONLINE, "Online" }, | |
162 | { FC_PORTSTATE_OFFLINE, "Offline" }, | |
163 | { FC_PORTSTATE_BLOCKED, "Blocked" }, | |
164 | { FC_PORTSTATE_BYPASSED, "Bypassed" }, | |
165 | { FC_PORTSTATE_DIAGNOSTICS, "Diagnostics" }, | |
166 | { FC_PORTSTATE_LINKDOWN, "Linkdown" }, | |
167 | { FC_PORTSTATE_ERROR, "Error" }, | |
168 | { FC_PORTSTATE_LOOPBACK, "Loopback" }, | |
42e33148 | 169 | { FC_PORTSTATE_DELETED, "Deleted" }, |
1da177e4 LT |
170 | }; |
171 | fc_enum_name_search(port_state, fc_port_state, fc_port_state_names) | |
172 | #define FC_PORTSTATE_MAX_NAMELEN 20 | |
173 | ||
174 | ||
a53eb5e0 JS |
175 | /* Convert fc_vport_state values to ascii string name */ |
176 | static struct { | |
177 | enum fc_vport_state value; | |
178 | char *name; | |
179 | } fc_vport_state_names[] = { | |
180 | { FC_VPORT_UNKNOWN, "Unknown" }, | |
181 | { FC_VPORT_ACTIVE, "Active" }, | |
182 | { FC_VPORT_DISABLED, "Disabled" }, | |
183 | { FC_VPORT_LINKDOWN, "Linkdown" }, | |
184 | { FC_VPORT_INITIALIZING, "Initializing" }, | |
185 | { FC_VPORT_NO_FABRIC_SUPP, "No Fabric Support" }, | |
186 | { FC_VPORT_NO_FABRIC_RSCS, "No Fabric Resources" }, | |
187 | { FC_VPORT_FABRIC_LOGOUT, "Fabric Logout" }, | |
188 | { FC_VPORT_FABRIC_REJ_WWN, "Fabric Rejected WWN" }, | |
189 | { FC_VPORT_FAILED, "VPort Failed" }, | |
190 | }; | |
191 | fc_enum_name_search(vport_state, fc_vport_state, fc_vport_state_names) | |
192 | #define FC_VPORTSTATE_MAX_NAMELEN 24 | |
193 | ||
194 | /* Reuse fc_vport_state enum function for vport_last_state */ | |
195 | #define get_fc_vport_last_state_name get_fc_vport_state_name | |
196 | ||
197 | ||
1da177e4 | 198 | /* Convert fc_tgtid_binding_type values to ascii string name */ |
0ad78200 | 199 | static const struct { |
1da177e4 LT |
200 | enum fc_tgtid_binding_type value; |
201 | char *name; | |
202 | int matchlen; | |
203 | } fc_tgtid_binding_type_names[] = { | |
204 | { FC_TGTID_BIND_NONE, "none", 4 }, | |
205 | { FC_TGTID_BIND_BY_WWPN, "wwpn (World Wide Port Name)", 4 }, | |
206 | { FC_TGTID_BIND_BY_WWNN, "wwnn (World Wide Node Name)", 4 }, | |
207 | { FC_TGTID_BIND_BY_ID, "port_id (FC Address)", 7 }, | |
208 | }; | |
209 | fc_enum_name_search(tgtid_bind_type, fc_tgtid_binding_type, | |
210 | fc_tgtid_binding_type_names) | |
211 | fc_enum_name_match(tgtid_bind_type, fc_tgtid_binding_type, | |
212 | fc_tgtid_binding_type_names) | |
213 | #define FC_BINDTYPE_MAX_NAMELEN 30 | |
214 | ||
215 | ||
216 | #define fc_bitfield_name_search(title, table) \ | |
217 | static ssize_t \ | |
218 | get_fc_##title##_names(u32 table_key, char *buf) \ | |
219 | { \ | |
220 | char *prefix = ""; \ | |
221 | ssize_t len = 0; \ | |
222 | int i; \ | |
223 | \ | |
6391a113 | 224 | for (i = 0; i < ARRAY_SIZE(table); i++) { \ |
1da177e4 LT |
225 | if (table[i].value & table_key) { \ |
226 | len += sprintf(buf + len, "%s%s", \ | |
227 | prefix, table[i].name); \ | |
228 | prefix = ", "; \ | |
229 | } \ | |
230 | } \ | |
231 | len += sprintf(buf + len, "\n"); \ | |
232 | return len; \ | |
233 | } | |
234 | ||
235 | ||
236 | /* Convert FC_COS bit values to ascii string name */ | |
0ad78200 | 237 | static const struct { |
1da177e4 LT |
238 | u32 value; |
239 | char *name; | |
240 | } fc_cos_names[] = { | |
241 | { FC_COS_CLASS1, "Class 1" }, | |
242 | { FC_COS_CLASS2, "Class 2" }, | |
243 | { FC_COS_CLASS3, "Class 3" }, | |
244 | { FC_COS_CLASS4, "Class 4" }, | |
245 | { FC_COS_CLASS6, "Class 6" }, | |
246 | }; | |
247 | fc_bitfield_name_search(cos, fc_cos_names) | |
248 | ||
249 | ||
250 | /* Convert FC_PORTSPEED bit values to ascii string name */ | |
0ad78200 | 251 | static const struct { |
1da177e4 LT |
252 | u32 value; |
253 | char *name; | |
254 | } fc_port_speed_names[] = { | |
255 | { FC_PORTSPEED_1GBIT, "1 Gbit" }, | |
256 | { FC_PORTSPEED_2GBIT, "2 Gbit" }, | |
257 | { FC_PORTSPEED_4GBIT, "4 Gbit" }, | |
258 | { FC_PORTSPEED_10GBIT, "10 Gbit" }, | |
c3d2350a JS |
259 | { FC_PORTSPEED_8GBIT, "8 Gbit" }, |
260 | { FC_PORTSPEED_16GBIT, "16 Gbit" }, | |
1da177e4 LT |
261 | { FC_PORTSPEED_NOT_NEGOTIATED, "Not Negotiated" }, |
262 | }; | |
263 | fc_bitfield_name_search(port_speed, fc_port_speed_names) | |
264 | ||
265 | ||
266 | static int | |
267 | show_fc_fc4s (char *buf, u8 *fc4_list) | |
268 | { | |
269 | int i, len=0; | |
270 | ||
271 | for (i = 0; i < FC_FC4_LIST_SIZE; i++, fc4_list++) | |
272 | len += sprintf(buf + len , "0x%02x ", *fc4_list); | |
273 | len += sprintf(buf + len, "\n"); | |
274 | return len; | |
275 | } | |
276 | ||
277 | ||
a53eb5e0 | 278 | /* Convert FC_PORT_ROLE bit values to ascii string name */ |
0ad78200 | 279 | static const struct { |
1da177e4 LT |
280 | u32 value; |
281 | char *name; | |
a53eb5e0 JS |
282 | } fc_port_role_names[] = { |
283 | { FC_PORT_ROLE_FCP_TARGET, "FCP Target" }, | |
284 | { FC_PORT_ROLE_FCP_INITIATOR, "FCP Initiator" }, | |
285 | { FC_PORT_ROLE_IP_PORT, "IP Port" }, | |
1da177e4 | 286 | }; |
a53eb5e0 | 287 | fc_bitfield_name_search(port_roles, fc_port_role_names) |
1da177e4 LT |
288 | |
289 | /* | |
290 | * Define roles that are specific to port_id. Values are relative to ROLE_MASK. | |
291 | */ | |
292 | #define FC_WELLKNOWN_PORTID_MASK 0xfffff0 | |
293 | #define FC_WELLKNOWN_ROLE_MASK 0x00000f | |
294 | #define FC_FPORT_PORTID 0x00000e | |
295 | #define FC_FABCTLR_PORTID 0x00000d | |
296 | #define FC_DIRSRVR_PORTID 0x00000c | |
297 | #define FC_TIMESRVR_PORTID 0x00000b | |
298 | #define FC_MGMTSRVR_PORTID 0x00000a | |
299 | ||
300 | ||
c4028958 DH |
301 | static void fc_timeout_deleted_rport(struct work_struct *work); |
302 | static void fc_timeout_fail_rport_io(struct work_struct *work); | |
303 | static void fc_scsi_scan_rport(struct work_struct *work); | |
1da177e4 LT |
304 | |
305 | /* | |
306 | * Attribute counts pre object type... | |
307 | * Increase these values if you add attributes | |
308 | */ | |
309 | #define FC_STARGET_NUM_ATTRS 3 | |
0f29b966 | 310 | #define FC_RPORT_NUM_ATTRS 10 |
a53eb5e0 JS |
311 | #define FC_VPORT_NUM_ATTRS 9 |
312 | #define FC_HOST_NUM_ATTRS 21 | |
1da177e4 LT |
313 | |
314 | struct fc_internal { | |
315 | struct scsi_transport_template t; | |
316 | struct fc_function_template *f; | |
317 | ||
318 | /* | |
319 | * For attributes : each object has : | |
320 | * An array of the actual attributes structures | |
321 | * An array of null-terminated pointers to the attribute | |
322 | * structures - used for mid-layer interaction. | |
323 | * | |
324 | * The attribute containers for the starget and host are are | |
325 | * part of the midlayer. As the remote port is specific to the | |
326 | * fc transport, we must provide the attribute container. | |
327 | */ | |
328 | struct class_device_attribute private_starget_attrs[ | |
329 | FC_STARGET_NUM_ATTRS]; | |
330 | struct class_device_attribute *starget_attrs[FC_STARGET_NUM_ATTRS + 1]; | |
331 | ||
332 | struct class_device_attribute private_host_attrs[FC_HOST_NUM_ATTRS]; | |
333 | struct class_device_attribute *host_attrs[FC_HOST_NUM_ATTRS + 1]; | |
334 | ||
335 | struct transport_container rport_attr_cont; | |
336 | struct class_device_attribute private_rport_attrs[FC_RPORT_NUM_ATTRS]; | |
337 | struct class_device_attribute *rport_attrs[FC_RPORT_NUM_ATTRS + 1]; | |
a53eb5e0 JS |
338 | |
339 | struct transport_container vport_attr_cont; | |
340 | struct class_device_attribute private_vport_attrs[FC_VPORT_NUM_ATTRS]; | |
341 | struct class_device_attribute *vport_attrs[FC_VPORT_NUM_ATTRS + 1]; | |
1da177e4 LT |
342 | }; |
343 | ||
344 | #define to_fc_internal(tmpl) container_of(tmpl, struct fc_internal, t) | |
345 | ||
d0a7e574 JB |
346 | static int fc_target_setup(struct transport_container *tc, struct device *dev, |
347 | struct class_device *cdev) | |
1da177e4 LT |
348 | { |
349 | struct scsi_target *starget = to_scsi_target(dev); | |
350 | struct fc_rport *rport = starget_to_rport(starget); | |
351 | ||
352 | /* | |
353 | * if parent is remote port, use values from remote port. | |
354 | * Otherwise, this host uses the fc_transport, but not the | |
355 | * remote port interface. As such, initialize to known non-values. | |
356 | */ | |
357 | if (rport) { | |
358 | fc_starget_node_name(starget) = rport->node_name; | |
359 | fc_starget_port_name(starget) = rport->port_name; | |
360 | fc_starget_port_id(starget) = rport->port_id; | |
361 | } else { | |
362 | fc_starget_node_name(starget) = -1; | |
363 | fc_starget_port_name(starget) = -1; | |
364 | fc_starget_port_id(starget) = -1; | |
365 | } | |
366 | ||
367 | return 0; | |
368 | } | |
369 | ||
370 | static DECLARE_TRANSPORT_CLASS(fc_transport_class, | |
371 | "fc_transport", | |
372 | fc_target_setup, | |
373 | NULL, | |
374 | NULL); | |
375 | ||
d0a7e574 JB |
376 | static int fc_host_setup(struct transport_container *tc, struct device *dev, |
377 | struct class_device *cdev) | |
1da177e4 LT |
378 | { |
379 | struct Scsi_Host *shost = dev_to_shost(dev); | |
aedf3497 | 380 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
1da177e4 | 381 | |
9ef3e4a4 | 382 | /* |
1da177e4 LT |
383 | * Set default values easily detected by the midlayer as |
384 | * failure cases. The scsi lldd is responsible for initializing | |
385 | * all transport attributes to valid values per host. | |
386 | */ | |
aedf3497 JS |
387 | fc_host->node_name = -1; |
388 | fc_host->port_name = -1; | |
389 | fc_host->permanent_port_name = -1; | |
390 | fc_host->supported_classes = FC_COS_UNSPECIFIED; | |
391 | memset(fc_host->supported_fc4s, 0, | |
392 | sizeof(fc_host->supported_fc4s)); | |
aedf3497 JS |
393 | fc_host->supported_speeds = FC_PORTSPEED_UNKNOWN; |
394 | fc_host->maxframe_size = -1; | |
a53eb5e0 | 395 | fc_host->max_npiv_vports = 0; |
aedf3497 JS |
396 | memset(fc_host->serial_number, 0, |
397 | sizeof(fc_host->serial_number)); | |
398 | ||
399 | fc_host->port_id = -1; | |
400 | fc_host->port_type = FC_PORTTYPE_UNKNOWN; | |
401 | fc_host->port_state = FC_PORTSTATE_UNKNOWN; | |
402 | memset(fc_host->active_fc4s, 0, | |
403 | sizeof(fc_host->active_fc4s)); | |
404 | fc_host->speed = FC_PORTSPEED_UNKNOWN; | |
405 | fc_host->fabric_name = -1; | |
b8d08210 JS |
406 | memset(fc_host->symbolic_name, 0, sizeof(fc_host->symbolic_name)); |
407 | memset(fc_host->system_hostname, 0, sizeof(fc_host->system_hostname)); | |
aedf3497 JS |
408 | |
409 | fc_host->tgtid_bind_type = FC_TGTID_BIND_BY_WWPN; | |
410 | ||
411 | INIT_LIST_HEAD(&fc_host->rports); | |
412 | INIT_LIST_HEAD(&fc_host->rport_bindings); | |
a53eb5e0 | 413 | INIT_LIST_HEAD(&fc_host->vports); |
aedf3497 JS |
414 | fc_host->next_rport_number = 0; |
415 | fc_host->next_target_id = 0; | |
a53eb5e0 JS |
416 | fc_host->next_vport_number = 0; |
417 | fc_host->npiv_vports_inuse = 0; | |
aedf3497 JS |
418 | |
419 | snprintf(fc_host->work_q_name, KOBJ_NAME_LEN, "fc_wq_%d", | |
420 | shost->host_no); | |
421 | fc_host->work_q = create_singlethread_workqueue( | |
422 | fc_host->work_q_name); | |
423 | if (!fc_host->work_q) | |
424 | return -ENOMEM; | |
425 | ||
426 | snprintf(fc_host->devloss_work_q_name, KOBJ_NAME_LEN, "fc_dl_%d", | |
427 | shost->host_no); | |
428 | fc_host->devloss_work_q = create_singlethread_workqueue( | |
429 | fc_host->devloss_work_q_name); | |
430 | if (!fc_host->devloss_work_q) { | |
431 | destroy_workqueue(fc_host->work_q); | |
432 | fc_host->work_q = NULL; | |
433 | return -ENOMEM; | |
434 | } | |
435 | ||
1da177e4 LT |
436 | return 0; |
437 | } | |
438 | ||
439 | static DECLARE_TRANSPORT_CLASS(fc_host_class, | |
440 | "fc_host", | |
441 | fc_host_setup, | |
442 | NULL, | |
443 | NULL); | |
444 | ||
445 | /* | |
446 | * Setup and Remove actions for remote ports are handled | |
447 | * in the service functions below. | |
448 | */ | |
449 | static DECLARE_TRANSPORT_CLASS(fc_rport_class, | |
450 | "fc_remote_ports", | |
451 | NULL, | |
452 | NULL, | |
453 | NULL); | |
454 | ||
a53eb5e0 JS |
455 | /* |
456 | * Setup and Remove actions for virtual ports are handled | |
457 | * in the service functions below. | |
458 | */ | |
459 | static DECLARE_TRANSPORT_CLASS(fc_vport_class, | |
460 | "fc_vports", | |
461 | NULL, | |
462 | NULL, | |
463 | NULL); | |
464 | ||
1da177e4 LT |
465 | /* |
466 | * Module Parameters | |
467 | */ | |
468 | ||
469 | /* | |
470 | * dev_loss_tmo: the default number of seconds that the FC transport | |
471 | * should insulate the loss of a remote port. | |
472 | * The maximum will be capped by the value of SCSI_DEVICE_BLOCK_MAX_TIMEOUT. | |
473 | */ | |
1c9e16e4 | 474 | static unsigned int fc_dev_loss_tmo = 60; /* seconds */ |
1da177e4 LT |
475 | |
476 | module_param_named(dev_loss_tmo, fc_dev_loss_tmo, int, S_IRUGO|S_IWUSR); | |
477 | MODULE_PARM_DESC(dev_loss_tmo, | |
478 | "Maximum number of seconds that the FC transport should" | |
479 | " insulate the loss of a remote port. Once this value is" | |
480 | " exceeded, the scsi target is removed. Value should be" | |
481 | " between 1 and SCSI_DEVICE_BLOCK_MAX_TIMEOUT."); | |
482 | ||
84314fd4 JS |
483 | /** |
484 | * Netlink Infrastructure | |
485 | **/ | |
486 | ||
487 | static atomic_t fc_event_seq; | |
488 | ||
489 | /** | |
490 | * fc_get_event_number - Obtain the next sequential FC event number | |
491 | * | |
492 | * Notes: | |
493 | * We could have inline'd this, but it would have required fc_event_seq to | |
494 | * be exposed. For now, live with the subroutine call. | |
495 | * Atomic used to avoid lock/unlock... | |
496 | **/ | |
497 | u32 | |
498 | fc_get_event_number(void) | |
499 | { | |
500 | return atomic_add_return(1, &fc_event_seq); | |
501 | } | |
502 | EXPORT_SYMBOL(fc_get_event_number); | |
503 | ||
504 | ||
505 | /** | |
506 | * fc_host_post_event - called to post an even on an fc_host. | |
507 | * | |
508 | * @shost: host the event occurred on | |
509 | * @event_number: fc event number obtained from get_fc_event_number() | |
510 | * @event_code: fc_host event being posted | |
511 | * @event_data: 32bits of data for the event being posted | |
512 | * | |
513 | * Notes: | |
514 | * This routine assumes no locks are held on entry. | |
515 | **/ | |
516 | void | |
517 | fc_host_post_event(struct Scsi_Host *shost, u32 event_number, | |
518 | enum fc_host_event_code event_code, u32 event_data) | |
519 | { | |
520 | struct sk_buff *skb; | |
521 | struct nlmsghdr *nlh; | |
522 | struct fc_nl_event *event; | |
523 | const char *name; | |
524 | u32 len, skblen; | |
525 | int err; | |
526 | ||
527 | if (!scsi_nl_sock) { | |
528 | err = -ENOENT; | |
529 | goto send_fail; | |
530 | } | |
531 | ||
532 | len = FC_NL_MSGALIGN(sizeof(*event)); | |
533 | skblen = NLMSG_SPACE(len); | |
534 | ||
535 | skb = alloc_skb(skblen, GFP_KERNEL); | |
536 | if (!skb) { | |
537 | err = -ENOBUFS; | |
538 | goto send_fail; | |
539 | } | |
540 | ||
541 | nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, | |
542 | skblen - sizeof(*nlh), 0); | |
543 | if (!nlh) { | |
544 | err = -ENOBUFS; | |
545 | goto send_fail_skb; | |
546 | } | |
547 | event = NLMSG_DATA(nlh); | |
548 | ||
549 | INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC, | |
550 | FC_NL_ASYNC_EVENT, len); | |
551 | event->seconds = get_seconds(); | |
552 | event->vendor_id = 0; | |
553 | event->host_no = shost->host_no; | |
554 | event->event_datalen = sizeof(u32); /* bytes */ | |
555 | event->event_num = event_number; | |
556 | event->event_code = event_code; | |
557 | event->event_data = event_data; | |
558 | ||
1b73c4bb JB |
559 | err = nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS, |
560 | GFP_KERNEL); | |
84314fd4 JS |
561 | if (err && (err != -ESRCH)) /* filter no recipient errors */ |
562 | /* nlmsg_multicast already kfree_skb'd */ | |
563 | goto send_fail; | |
564 | ||
565 | return; | |
566 | ||
567 | send_fail_skb: | |
568 | kfree_skb(skb); | |
569 | send_fail: | |
570 | name = get_fc_host_event_code_name(event_code); | |
571 | printk(KERN_WARNING | |
572 | "%s: Dropped Event : host %d %s data 0x%08x - err %d\n", | |
573 | __FUNCTION__, shost->host_no, | |
574 | (name) ? name : "<unknown>", event_data, err); | |
575 | return; | |
576 | } | |
577 | EXPORT_SYMBOL(fc_host_post_event); | |
578 | ||
579 | ||
580 | /** | |
581 | * fc_host_post_vendor_event - called to post a vendor unique event on | |
582 | * a fc_host | |
583 | * | |
584 | * @shost: host the event occurred on | |
585 | * @event_number: fc event number obtained from get_fc_event_number() | |
586 | * @data_len: amount, in bytes, of vendor unique data | |
587 | * @data_buf: pointer to vendor unique data | |
588 | * | |
589 | * Notes: | |
590 | * This routine assumes no locks are held on entry. | |
591 | **/ | |
592 | void | |
593 | fc_host_post_vendor_event(struct Scsi_Host *shost, u32 event_number, | |
f14e2e29 | 594 | u32 data_len, char * data_buf, u64 vendor_id) |
84314fd4 JS |
595 | { |
596 | struct sk_buff *skb; | |
597 | struct nlmsghdr *nlh; | |
598 | struct fc_nl_event *event; | |
599 | u32 len, skblen; | |
600 | int err; | |
601 | ||
602 | if (!scsi_nl_sock) { | |
603 | err = -ENOENT; | |
604 | goto send_vendor_fail; | |
605 | } | |
606 | ||
607 | len = FC_NL_MSGALIGN(sizeof(*event) + data_len); | |
608 | skblen = NLMSG_SPACE(len); | |
609 | ||
610 | skb = alloc_skb(skblen, GFP_KERNEL); | |
611 | if (!skb) { | |
612 | err = -ENOBUFS; | |
613 | goto send_vendor_fail; | |
614 | } | |
615 | ||
616 | nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, | |
617 | skblen - sizeof(*nlh), 0); | |
618 | if (!nlh) { | |
619 | err = -ENOBUFS; | |
620 | goto send_vendor_fail_skb; | |
621 | } | |
622 | event = NLMSG_DATA(nlh); | |
623 | ||
624 | INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC, | |
625 | FC_NL_ASYNC_EVENT, len); | |
626 | event->seconds = get_seconds(); | |
627 | event->vendor_id = vendor_id; | |
628 | event->host_no = shost->host_no; | |
629 | event->event_datalen = data_len; /* bytes */ | |
630 | event->event_num = event_number; | |
631 | event->event_code = FCH_EVT_VENDOR_UNIQUE; | |
632 | memcpy(&event->event_data, data_buf, data_len); | |
633 | ||
1b73c4bb JB |
634 | err = nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS, |
635 | GFP_KERNEL); | |
84314fd4 JS |
636 | if (err && (err != -ESRCH)) /* filter no recipient errors */ |
637 | /* nlmsg_multicast already kfree_skb'd */ | |
638 | goto send_vendor_fail; | |
639 | ||
640 | return; | |
641 | ||
642 | send_vendor_fail_skb: | |
643 | kfree_skb(skb); | |
644 | send_vendor_fail: | |
645 | printk(KERN_WARNING | |
646 | "%s: Dropped Event : host %d vendor_unique - err %d\n", | |
647 | __FUNCTION__, shost->host_no, err); | |
648 | return; | |
649 | } | |
650 | EXPORT_SYMBOL(fc_host_post_vendor_event); | |
651 | ||
652 | ||
1da177e4 LT |
653 | |
654 | static __init int fc_transport_init(void) | |
655 | { | |
84314fd4 JS |
656 | int error; |
657 | ||
658 | atomic_set(&fc_event_seq, 0); | |
659 | ||
660 | error = transport_class_register(&fc_host_class); | |
a53eb5e0 JS |
661 | if (error) |
662 | return error; | |
663 | error = transport_class_register(&fc_vport_class); | |
1da177e4 LT |
664 | if (error) |
665 | return error; | |
666 | error = transport_class_register(&fc_rport_class); | |
667 | if (error) | |
668 | return error; | |
669 | return transport_class_register(&fc_transport_class); | |
670 | } | |
671 | ||
672 | static void __exit fc_transport_exit(void) | |
673 | { | |
674 | transport_class_unregister(&fc_transport_class); | |
675 | transport_class_unregister(&fc_rport_class); | |
676 | transport_class_unregister(&fc_host_class); | |
a53eb5e0 | 677 | transport_class_unregister(&fc_vport_class); |
1da177e4 LT |
678 | } |
679 | ||
680 | /* | |
681 | * FC Remote Port Attribute Management | |
682 | */ | |
683 | ||
684 | #define fc_rport_show_function(field, format_string, sz, cast) \ | |
685 | static ssize_t \ | |
686 | show_fc_rport_##field (struct class_device *cdev, char *buf) \ | |
687 | { \ | |
688 | struct fc_rport *rport = transport_class_to_rport(cdev); \ | |
689 | struct Scsi_Host *shost = rport_to_shost(rport); \ | |
690 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
19a7b4ae JSEC |
691 | if ((i->f->get_rport_##field) && \ |
692 | !((rport->port_state == FC_PORTSTATE_BLOCKED) || \ | |
42e33148 | 693 | (rport->port_state == FC_PORTSTATE_DELETED) || \ |
19a7b4ae | 694 | (rport->port_state == FC_PORTSTATE_NOTPRESENT))) \ |
1da177e4 LT |
695 | i->f->get_rport_##field(rport); \ |
696 | return snprintf(buf, sz, format_string, cast rport->field); \ | |
697 | } | |
698 | ||
699 | #define fc_rport_store_function(field) \ | |
700 | static ssize_t \ | |
701 | store_fc_rport_##field(struct class_device *cdev, const char *buf, \ | |
702 | size_t count) \ | |
703 | { \ | |
704 | int val; \ | |
705 | struct fc_rport *rport = transport_class_to_rport(cdev); \ | |
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, ) \ | |
722 | static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO, \ | |
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)) \ | |
727 | static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO, \ | |
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) \ | |
733 | static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO | S_IWUSR, \ | |
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 \ | |
740 | show_fc_rport_##field (struct class_device *cdev, char *buf) \ | |
741 | { \ | |
742 | struct fc_rport *rport = transport_class_to_rport(cdev); \ | |
743 | return snprintf(buf, sz, format_string, cast rport->field); \ | |
744 | } | |
745 | ||
746 | #define fc_private_rport_rd_attr(field, format_string, sz) \ | |
747 | fc_private_rport_show_function(field, format_string, sz, ) \ | |
748 | static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO, \ | |
749 | show_fc_rport_##field, NULL) | |
750 | ||
751 | #define fc_private_rport_rd_attr_cast(field, format_string, sz, cast) \ | |
752 | fc_private_rport_show_function(field, format_string, sz, (cast)) \ | |
753 | static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO, \ | |
754 | show_fc_rport_##field, NULL) | |
755 | ||
756 | ||
757 | #define fc_private_rport_rd_enum_attr(title, maxlen) \ | |
758 | static ssize_t \ | |
759 | show_fc_rport_##title (struct class_device *cdev, char *buf) \ | |
760 | { \ | |
761 | struct fc_rport *rport = transport_class_to_rport(cdev); \ | |
762 | const char *name; \ | |
763 | name = get_fc_##title##_name(rport->title); \ | |
764 | if (!name) \ | |
765 | return -EINVAL; \ | |
766 | return snprintf(buf, maxlen, "%s\n", name); \ | |
767 | } \ | |
768 | static FC_CLASS_DEVICE_ATTR(rport, title, S_IRUGO, \ | |
769 | show_fc_rport_##title, NULL) | |
770 | ||
771 | ||
772 | #define SETUP_RPORT_ATTRIBUTE_RD(field) \ | |
773 | i->private_rport_attrs[count] = class_device_attr_rport_##field; \ | |
774 | i->private_rport_attrs[count].attr.mode = S_IRUGO; \ | |
775 | i->private_rport_attrs[count].store = NULL; \ | |
776 | i->rport_attrs[count] = &i->private_rport_attrs[count]; \ | |
777 | if (i->f->show_rport_##field) \ | |
778 | count++ | |
779 | ||
780 | #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(field) \ | |
781 | i->private_rport_attrs[count] = class_device_attr_rport_##field; \ | |
782 | i->private_rport_attrs[count].attr.mode = S_IRUGO; \ | |
783 | i->private_rport_attrs[count].store = NULL; \ | |
784 | i->rport_attrs[count] = &i->private_rport_attrs[count]; \ | |
785 | count++ | |
786 | ||
787 | #define SETUP_RPORT_ATTRIBUTE_RW(field) \ | |
788 | i->private_rport_attrs[count] = class_device_attr_rport_##field; \ | |
789 | if (!i->f->set_rport_##field) { \ | |
790 | i->private_rport_attrs[count].attr.mode = S_IRUGO; \ | |
791 | i->private_rport_attrs[count].store = NULL; \ | |
792 | } \ | |
793 | i->rport_attrs[count] = &i->private_rport_attrs[count]; \ | |
794 | if (i->f->show_rport_##field) \ | |
795 | count++ | |
796 | ||
0f29b966 JS |
797 | #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(field) \ |
798 | { \ | |
799 | i->private_rport_attrs[count] = class_device_attr_rport_##field; \ | |
800 | i->rport_attrs[count] = &i->private_rport_attrs[count]; \ | |
801 | count++; \ | |
802 | } | |
803 | ||
1da177e4 LT |
804 | |
805 | /* The FC Transport Remote Port Attributes: */ | |
806 | ||
807 | /* Fixed Remote Port Attributes */ | |
808 | ||
809 | fc_private_rport_rd_attr(maxframe_size, "%u bytes\n", 20); | |
810 | ||
811 | static ssize_t | |
812 | show_fc_rport_supported_classes (struct class_device *cdev, char *buf) | |
813 | { | |
814 | struct fc_rport *rport = transport_class_to_rport(cdev); | |
815 | if (rport->supported_classes == FC_COS_UNSPECIFIED) | |
816 | return snprintf(buf, 20, "unspecified\n"); | |
817 | return get_fc_cos_names(rport->supported_classes, buf); | |
818 | } | |
819 | static FC_CLASS_DEVICE_ATTR(rport, supported_classes, S_IRUGO, | |
820 | show_fc_rport_supported_classes, NULL); | |
821 | ||
822 | /* Dynamic Remote Port Attributes */ | |
823 | ||
19a7b4ae JSEC |
824 | /* |
825 | * dev_loss_tmo attribute | |
826 | */ | |
827 | fc_rport_show_function(dev_loss_tmo, "%d\n", 20, ) | |
828 | static ssize_t | |
829 | store_fc_rport_dev_loss_tmo(struct class_device *cdev, const char *buf, | |
830 | size_t count) | |
831 | { | |
832 | int val; | |
833 | struct fc_rport *rport = transport_class_to_rport(cdev); | |
834 | struct Scsi_Host *shost = rport_to_shost(rport); | |
835 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
0f29b966 | 836 | char *cp; |
19a7b4ae | 837 | if ((rport->port_state == FC_PORTSTATE_BLOCKED) || |
42e33148 | 838 | (rport->port_state == FC_PORTSTATE_DELETED) || |
19a7b4ae JSEC |
839 | (rport->port_state == FC_PORTSTATE_NOTPRESENT)) |
840 | return -EBUSY; | |
0f29b966 JS |
841 | val = simple_strtoul(buf, &cp, 0); |
842 | if ((*cp && (*cp != '\n')) || | |
843 | (val < 0) || (val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT)) | |
19a7b4ae JSEC |
844 | return -EINVAL; |
845 | i->f->set_rport_dev_loss_tmo(rport, val); | |
846 | return count; | |
847 | } | |
848 | static FC_CLASS_DEVICE_ATTR(rport, dev_loss_tmo, S_IRUGO | S_IWUSR, | |
849 | show_fc_rport_dev_loss_tmo, store_fc_rport_dev_loss_tmo); | |
1da177e4 LT |
850 | |
851 | ||
852 | /* Private Remote Port Attributes */ | |
853 | ||
854 | fc_private_rport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); | |
855 | fc_private_rport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); | |
856 | fc_private_rport_rd_attr(port_id, "0x%06x\n", 20); | |
857 | ||
858 | static ssize_t | |
859 | show_fc_rport_roles (struct class_device *cdev, char *buf) | |
860 | { | |
861 | struct fc_rport *rport = transport_class_to_rport(cdev); | |
862 | ||
863 | /* identify any roles that are port_id specific */ | |
864 | if ((rport->port_id != -1) && | |
865 | (rport->port_id & FC_WELLKNOWN_PORTID_MASK) == | |
866 | FC_WELLKNOWN_PORTID_MASK) { | |
867 | switch (rport->port_id & FC_WELLKNOWN_ROLE_MASK) { | |
868 | case FC_FPORT_PORTID: | |
869 | return snprintf(buf, 30, "Fabric Port\n"); | |
870 | case FC_FABCTLR_PORTID: | |
871 | return snprintf(buf, 30, "Fabric Controller\n"); | |
872 | case FC_DIRSRVR_PORTID: | |
873 | return snprintf(buf, 30, "Directory Server\n"); | |
874 | case FC_TIMESRVR_PORTID: | |
875 | return snprintf(buf, 30, "Time Server\n"); | |
876 | case FC_MGMTSRVR_PORTID: | |
877 | return snprintf(buf, 30, "Management Server\n"); | |
878 | default: | |
879 | return snprintf(buf, 30, "Unknown Fabric Entity\n"); | |
880 | } | |
881 | } else { | |
a53eb5e0 | 882 | if (rport->roles == FC_PORT_ROLE_UNKNOWN) |
1da177e4 | 883 | return snprintf(buf, 20, "unknown\n"); |
a53eb5e0 | 884 | return get_fc_port_roles_names(rport->roles, buf); |
1da177e4 LT |
885 | } |
886 | } | |
887 | static FC_CLASS_DEVICE_ATTR(rport, roles, S_IRUGO, | |
888 | show_fc_rport_roles, NULL); | |
889 | ||
890 | fc_private_rport_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN); | |
891 | fc_private_rport_rd_attr(scsi_target_id, "%d\n", 20); | |
892 | ||
0f29b966 JS |
893 | /* |
894 | * fast_io_fail_tmo attribute | |
895 | */ | |
896 | static ssize_t | |
897 | show_fc_rport_fast_io_fail_tmo (struct class_device *cdev, char *buf) | |
898 | { | |
899 | struct fc_rport *rport = transport_class_to_rport(cdev); | |
900 | ||
901 | if (rport->fast_io_fail_tmo == -1) | |
902 | return snprintf(buf, 5, "off\n"); | |
903 | return snprintf(buf, 20, "%d\n", rport->fast_io_fail_tmo); | |
904 | } | |
905 | ||
906 | static ssize_t | |
907 | store_fc_rport_fast_io_fail_tmo(struct class_device *cdev, const char *buf, | |
908 | size_t count) | |
909 | { | |
910 | int val; | |
911 | char *cp; | |
912 | struct fc_rport *rport = transport_class_to_rport(cdev); | |
913 | ||
914 | if ((rport->port_state == FC_PORTSTATE_BLOCKED) || | |
915 | (rport->port_state == FC_PORTSTATE_DELETED) || | |
916 | (rport->port_state == FC_PORTSTATE_NOTPRESENT)) | |
917 | return -EBUSY; | |
918 | if (strncmp(buf, "off", 3) == 0) | |
919 | rport->fast_io_fail_tmo = -1; | |
920 | else { | |
921 | val = simple_strtoul(buf, &cp, 0); | |
922 | if ((*cp && (*cp != '\n')) || | |
923 | (val < 0) || (val >= rport->dev_loss_tmo)) | |
924 | return -EINVAL; | |
925 | rport->fast_io_fail_tmo = val; | |
926 | } | |
927 | return count; | |
928 | } | |
929 | static FC_CLASS_DEVICE_ATTR(rport, fast_io_fail_tmo, S_IRUGO | S_IWUSR, | |
930 | show_fc_rport_fast_io_fail_tmo, store_fc_rport_fast_io_fail_tmo); | |
1da177e4 LT |
931 | |
932 | ||
933 | /* | |
934 | * FC SCSI Target Attribute Management | |
935 | */ | |
936 | ||
937 | /* | |
938 | * Note: in the target show function we recognize when the remote | |
a53eb5e0 | 939 | * port is in the heirarchy and do not allow the driver to get |
1da177e4 LT |
940 | * involved in sysfs functions. The driver only gets involved if |
941 | * it's the "old" style that doesn't use rports. | |
942 | */ | |
943 | #define fc_starget_show_function(field, format_string, sz, cast) \ | |
944 | static ssize_t \ | |
945 | show_fc_starget_##field (struct class_device *cdev, char *buf) \ | |
946 | { \ | |
947 | struct scsi_target *starget = transport_class_to_starget(cdev); \ | |
948 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \ | |
949 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
950 | struct fc_rport *rport = starget_to_rport(starget); \ | |
951 | if (rport) \ | |
952 | fc_starget_##field(starget) = rport->field; \ | |
953 | else if (i->f->get_starget_##field) \ | |
954 | i->f->get_starget_##field(starget); \ | |
955 | return snprintf(buf, sz, format_string, \ | |
956 | cast fc_starget_##field(starget)); \ | |
957 | } | |
958 | ||
959 | #define fc_starget_rd_attr(field, format_string, sz) \ | |
960 | fc_starget_show_function(field, format_string, sz, ) \ | |
961 | static FC_CLASS_DEVICE_ATTR(starget, field, S_IRUGO, \ | |
962 | show_fc_starget_##field, NULL) | |
963 | ||
964 | #define fc_starget_rd_attr_cast(field, format_string, sz, cast) \ | |
965 | fc_starget_show_function(field, format_string, sz, (cast)) \ | |
966 | static FC_CLASS_DEVICE_ATTR(starget, field, S_IRUGO, \ | |
967 | show_fc_starget_##field, NULL) | |
968 | ||
969 | #define SETUP_STARGET_ATTRIBUTE_RD(field) \ | |
970 | i->private_starget_attrs[count] = class_device_attr_starget_##field; \ | |
971 | i->private_starget_attrs[count].attr.mode = S_IRUGO; \ | |
972 | i->private_starget_attrs[count].store = NULL; \ | |
973 | i->starget_attrs[count] = &i->private_starget_attrs[count]; \ | |
974 | if (i->f->show_starget_##field) \ | |
975 | count++ | |
976 | ||
977 | #define SETUP_STARGET_ATTRIBUTE_RW(field) \ | |
978 | i->private_starget_attrs[count] = class_device_attr_starget_##field; \ | |
979 | if (!i->f->set_starget_##field) { \ | |
980 | i->private_starget_attrs[count].attr.mode = S_IRUGO; \ | |
981 | i->private_starget_attrs[count].store = NULL; \ | |
982 | } \ | |
983 | i->starget_attrs[count] = &i->private_starget_attrs[count]; \ | |
984 | if (i->f->show_starget_##field) \ | |
985 | count++ | |
986 | ||
987 | /* The FC Transport SCSI Target Attributes: */ | |
988 | fc_starget_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); | |
989 | fc_starget_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); | |
990 | fc_starget_rd_attr(port_id, "0x%06x\n", 20); | |
991 | ||
992 | ||
a53eb5e0 JS |
993 | /* |
994 | * FC Virtual Port Attribute Management | |
995 | */ | |
996 | ||
997 | #define fc_vport_show_function(field, format_string, sz, cast) \ | |
998 | static ssize_t \ | |
999 | show_fc_vport_##field (struct class_device *cdev, char *buf) \ | |
1000 | { \ | |
1001 | struct fc_vport *vport = transport_class_to_vport(cdev); \ | |
1002 | struct Scsi_Host *shost = vport_to_shost(vport); \ | |
1003 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
1004 | if ((i->f->get_vport_##field) && \ | |
1005 | !(vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))) \ | |
1006 | i->f->get_vport_##field(vport); \ | |
1007 | return snprintf(buf, sz, format_string, cast vport->field); \ | |
1008 | } | |
1009 | ||
1010 | #define fc_vport_store_function(field) \ | |
1011 | static ssize_t \ | |
1012 | store_fc_vport_##field(struct class_device *cdev, const char *buf, \ | |
1013 | size_t count) \ | |
1014 | { \ | |
1015 | int val; \ | |
1016 | struct fc_vport *vport = transport_class_to_vport(cdev); \ | |
1017 | struct Scsi_Host *shost = vport_to_shost(vport); \ | |
1018 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
1019 | char *cp; \ | |
1020 | if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \ | |
1021 | return -EBUSY; \ | |
1022 | val = simple_strtoul(buf, &cp, 0); \ | |
1023 | if (*cp && (*cp != '\n')) \ | |
1024 | return -EINVAL; \ | |
1025 | i->f->set_vport_##field(vport, val); \ | |
1026 | return count; \ | |
1027 | } | |
1028 | ||
1029 | #define fc_vport_store_str_function(field, slen) \ | |
1030 | static ssize_t \ | |
1031 | store_fc_vport_##field(struct class_device *cdev, const char *buf, \ | |
1032 | size_t count) \ | |
1033 | { \ | |
1034 | struct fc_vport *vport = transport_class_to_vport(cdev); \ | |
1035 | struct Scsi_Host *shost = vport_to_shost(vport); \ | |
1036 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
1037 | unsigned int cnt=count; \ | |
1038 | \ | |
1039 | /* count may include a LF at end of string */ \ | |
1040 | if (buf[cnt-1] == '\n') \ | |
1041 | cnt--; \ | |
1042 | if (cnt > ((slen) - 1)) \ | |
1043 | return -EINVAL; \ | |
1044 | memcpy(vport->field, buf, cnt); \ | |
1045 | i->f->set_vport_##field(vport); \ | |
1046 | return count; \ | |
1047 | } | |
1048 | ||
1049 | #define fc_vport_rd_attr(field, format_string, sz) \ | |
1050 | fc_vport_show_function(field, format_string, sz, ) \ | |
1051 | static FC_CLASS_DEVICE_ATTR(vport, field, S_IRUGO, \ | |
1052 | show_fc_vport_##field, NULL) | |
1053 | ||
1054 | #define fc_vport_rd_attr_cast(field, format_string, sz, cast) \ | |
1055 | fc_vport_show_function(field, format_string, sz, (cast)) \ | |
1056 | static FC_CLASS_DEVICE_ATTR(vport, field, S_IRUGO, \ | |
1057 | show_fc_vport_##field, NULL) | |
1058 | ||
1059 | #define fc_vport_rw_attr(field, format_string, sz) \ | |
1060 | fc_vport_show_function(field, format_string, sz, ) \ | |
1061 | fc_vport_store_function(field) \ | |
1062 | static FC_CLASS_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \ | |
1063 | show_fc_vport_##field, \ | |
1064 | store_fc_vport_##field) | |
1065 | ||
1066 | #define fc_private_vport_show_function(field, format_string, sz, cast) \ | |
1067 | static ssize_t \ | |
1068 | show_fc_vport_##field (struct class_device *cdev, char *buf) \ | |
1069 | { \ | |
1070 | struct fc_vport *vport = transport_class_to_vport(cdev); \ | |
1071 | return snprintf(buf, sz, format_string, cast vport->field); \ | |
1072 | } | |
1073 | ||
1074 | #define fc_private_vport_store_u32_function(field) \ | |
1075 | static ssize_t \ | |
1076 | store_fc_vport_##field(struct class_device *cdev, const char *buf, \ | |
1077 | size_t count) \ | |
1078 | { \ | |
1079 | u32 val; \ | |
1080 | struct fc_vport *vport = transport_class_to_vport(cdev); \ | |
1081 | char *cp; \ | |
1082 | if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \ | |
1083 | return -EBUSY; \ | |
1084 | val = simple_strtoul(buf, &cp, 0); \ | |
1085 | if (*cp && (*cp != '\n')) \ | |
1086 | return -EINVAL; \ | |
1087 | vport->field = val; \ | |
1088 | return count; \ | |
1089 | } | |
1090 | ||
1091 | ||
1092 | #define fc_private_vport_rd_attr(field, format_string, sz) \ | |
1093 | fc_private_vport_show_function(field, format_string, sz, ) \ | |
1094 | static FC_CLASS_DEVICE_ATTR(vport, field, S_IRUGO, \ | |
1095 | show_fc_vport_##field, NULL) | |
1096 | ||
1097 | #define fc_private_vport_rd_attr_cast(field, format_string, sz, cast) \ | |
1098 | fc_private_vport_show_function(field, format_string, sz, (cast)) \ | |
1099 | static FC_CLASS_DEVICE_ATTR(vport, field, S_IRUGO, \ | |
1100 | show_fc_vport_##field, NULL) | |
1101 | ||
1102 | #define fc_private_vport_rw_u32_attr(field, format_string, sz) \ | |
1103 | fc_private_vport_show_function(field, format_string, sz, ) \ | |
1104 | fc_private_vport_store_u32_function(field) \ | |
1105 | static FC_CLASS_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \ | |
1106 | show_fc_vport_##field, \ | |
1107 | store_fc_vport_##field) | |
1108 | ||
1109 | ||
1110 | #define fc_private_vport_rd_enum_attr(title, maxlen) \ | |
1111 | static ssize_t \ | |
1112 | show_fc_vport_##title (struct class_device *cdev, char *buf) \ | |
1113 | { \ | |
1114 | struct fc_vport *vport = transport_class_to_vport(cdev); \ | |
1115 | const char *name; \ | |
1116 | name = get_fc_##title##_name(vport->title); \ | |
1117 | if (!name) \ | |
1118 | return -EINVAL; \ | |
1119 | return snprintf(buf, maxlen, "%s\n", name); \ | |
1120 | } \ | |
1121 | static FC_CLASS_DEVICE_ATTR(vport, title, S_IRUGO, \ | |
1122 | show_fc_vport_##title, NULL) | |
1123 | ||
1124 | ||
1125 | #define SETUP_VPORT_ATTRIBUTE_RD(field) \ | |
1126 | i->private_vport_attrs[count] = class_device_attr_vport_##field; \ | |
1127 | i->private_vport_attrs[count].attr.mode = S_IRUGO; \ | |
1128 | i->private_vport_attrs[count].store = NULL; \ | |
1129 | i->vport_attrs[count] = &i->private_vport_attrs[count]; \ | |
1130 | if (i->f->get_##field) \ | |
1131 | count++ | |
1132 | /* NOTE: Above MACRO differs: checks function not show bit */ | |
1133 | ||
1134 | #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(field) \ | |
1135 | i->private_vport_attrs[count] = class_device_attr_vport_##field; \ | |
1136 | i->private_vport_attrs[count].attr.mode = S_IRUGO; \ | |
1137 | i->private_vport_attrs[count].store = NULL; \ | |
1138 | i->vport_attrs[count] = &i->private_vport_attrs[count]; \ | |
1139 | count++ | |
1140 | ||
1141 | #define SETUP_VPORT_ATTRIBUTE_WR(field) \ | |
1142 | i->private_vport_attrs[count] = class_device_attr_vport_##field; \ | |
1143 | i->vport_attrs[count] = &i->private_vport_attrs[count]; \ | |
1144 | if (i->f->field) \ | |
1145 | count++ | |
1146 | /* NOTE: Above MACRO differs: checks function */ | |
1147 | ||
1148 | #define SETUP_VPORT_ATTRIBUTE_RW(field) \ | |
1149 | i->private_vport_attrs[count] = class_device_attr_vport_##field; \ | |
1150 | if (!i->f->set_vport_##field) { \ | |
1151 | i->private_vport_attrs[count].attr.mode = S_IRUGO; \ | |
1152 | i->private_vport_attrs[count].store = NULL; \ | |
1153 | } \ | |
1154 | i->vport_attrs[count] = &i->private_vport_attrs[count]; \ | |
1155 | count++ | |
1156 | /* NOTE: Above MACRO differs: does not check show bit */ | |
1157 | ||
1158 | #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RW(field) \ | |
1159 | { \ | |
1160 | i->private_vport_attrs[count] = class_device_attr_vport_##field; \ | |
1161 | i->vport_attrs[count] = &i->private_vport_attrs[count]; \ | |
1162 | count++; \ | |
1163 | } | |
1164 | ||
1165 | ||
1166 | /* The FC Transport Virtual Port Attributes: */ | |
1167 | ||
1168 | /* Fixed Virtual Port Attributes */ | |
1169 | ||
1170 | /* Dynamic Virtual Port Attributes */ | |
1171 | ||
1172 | /* Private Virtual Port Attributes */ | |
1173 | ||
1174 | fc_private_vport_rd_enum_attr(vport_state, FC_VPORTSTATE_MAX_NAMELEN); | |
1175 | fc_private_vport_rd_enum_attr(vport_last_state, FC_VPORTSTATE_MAX_NAMELEN); | |
1176 | fc_private_vport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); | |
1177 | fc_private_vport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); | |
1178 | ||
1179 | static ssize_t | |
1180 | show_fc_vport_roles (struct class_device *cdev, char *buf) | |
1181 | { | |
1182 | struct fc_vport *vport = transport_class_to_vport(cdev); | |
1183 | ||
1184 | if (vport->roles == FC_PORT_ROLE_UNKNOWN) | |
1185 | return snprintf(buf, 20, "unknown\n"); | |
1186 | return get_fc_port_roles_names(vport->roles, buf); | |
1187 | } | |
1188 | static FC_CLASS_DEVICE_ATTR(vport, roles, S_IRUGO, show_fc_vport_roles, NULL); | |
1189 | ||
1190 | fc_private_vport_rd_enum_attr(vport_type, FC_PORTTYPE_MAX_NAMELEN); | |
1191 | ||
1192 | fc_private_vport_show_function(symbolic_name, "%s\n", | |
1193 | FC_VPORT_SYMBOLIC_NAMELEN + 1, ) | |
1194 | fc_vport_store_str_function(symbolic_name, FC_VPORT_SYMBOLIC_NAMELEN) | |
1195 | static FC_CLASS_DEVICE_ATTR(vport, symbolic_name, S_IRUGO | S_IWUSR, | |
1196 | show_fc_vport_symbolic_name, store_fc_vport_symbolic_name); | |
1197 | ||
1198 | static ssize_t | |
1199 | store_fc_vport_delete(struct class_device *cdev, const char *buf, | |
1200 | size_t count) | |
1201 | { | |
1202 | struct fc_vport *vport = transport_class_to_vport(cdev); | |
9ef3e4a4 | 1203 | struct Scsi_Host *shost = vport_to_shost(vport); |
a53eb5e0 | 1204 | |
9ef3e4a4 | 1205 | fc_queue_work(shost, &vport->vport_delete_work); |
a53eb5e0 JS |
1206 | return count; |
1207 | } | |
1208 | static FC_CLASS_DEVICE_ATTR(vport, vport_delete, S_IWUSR, | |
1209 | NULL, store_fc_vport_delete); | |
1210 | ||
1211 | ||
1212 | /* | |
1213 | * Enable/Disable vport | |
1214 | * Write "1" to disable, write "0" to enable | |
1215 | */ | |
1216 | static ssize_t | |
1217 | store_fc_vport_disable(struct class_device *cdev, const char *buf, | |
1218 | size_t count) | |
1219 | { | |
1220 | struct fc_vport *vport = transport_class_to_vport(cdev); | |
1221 | struct Scsi_Host *shost = vport_to_shost(vport); | |
1222 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
1223 | int stat; | |
1224 | ||
1225 | if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) | |
1226 | return -EBUSY; | |
1227 | ||
1228 | if (*buf == '0') { | |
1229 | if (vport->vport_state != FC_VPORT_DISABLED) | |
1230 | return -EALREADY; | |
1231 | } else if (*buf == '1') { | |
1232 | if (vport->vport_state == FC_VPORT_DISABLED) | |
1233 | return -EALREADY; | |
1234 | } else | |
1235 | return -EINVAL; | |
1236 | ||
1237 | stat = i->f->vport_disable(vport, ((*buf == '0') ? false : true)); | |
1238 | return stat ? stat : count; | |
1239 | } | |
1240 | static FC_CLASS_DEVICE_ATTR(vport, vport_disable, S_IWUSR, | |
1241 | NULL, store_fc_vport_disable); | |
1242 | ||
1243 | ||
1da177e4 LT |
1244 | /* |
1245 | * Host Attribute Management | |
1246 | */ | |
1247 | ||
1248 | #define fc_host_show_function(field, format_string, sz, cast) \ | |
1249 | static ssize_t \ | |
1250 | show_fc_host_##field (struct class_device *cdev, char *buf) \ | |
1251 | { \ | |
1252 | struct Scsi_Host *shost = transport_class_to_shost(cdev); \ | |
1253 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
1254 | if (i->f->get_host_##field) \ | |
1255 | i->f->get_host_##field(shost); \ | |
1256 | return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \ | |
1257 | } | |
1258 | ||
1259 | #define fc_host_store_function(field) \ | |
1260 | static ssize_t \ | |
1261 | store_fc_host_##field(struct class_device *cdev, const char *buf, \ | |
1262 | size_t count) \ | |
1263 | { \ | |
1264 | int val; \ | |
1265 | struct Scsi_Host *shost = transport_class_to_shost(cdev); \ | |
1266 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
0f29b966 | 1267 | char *cp; \ |
1da177e4 | 1268 | \ |
0f29b966 JS |
1269 | val = simple_strtoul(buf, &cp, 0); \ |
1270 | if (*cp && (*cp != '\n')) \ | |
1271 | return -EINVAL; \ | |
1da177e4 LT |
1272 | i->f->set_host_##field(shost, val); \ |
1273 | return count; \ | |
1274 | } | |
1275 | ||
b8d08210 JS |
1276 | #define fc_host_store_str_function(field, slen) \ |
1277 | static ssize_t \ | |
1278 | store_fc_host_##field(struct class_device *cdev, const char *buf, \ | |
1279 | size_t count) \ | |
1280 | { \ | |
1281 | struct Scsi_Host *shost = transport_class_to_shost(cdev); \ | |
1282 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
1283 | unsigned int cnt=count; \ | |
1284 | \ | |
1285 | /* count may include a LF at end of string */ \ | |
1286 | if (buf[cnt-1] == '\n') \ | |
1287 | cnt--; \ | |
1288 | if (cnt > ((slen) - 1)) \ | |
1289 | return -EINVAL; \ | |
1290 | memcpy(fc_host_##field(shost), buf, cnt); \ | |
1291 | i->f->set_host_##field(shost); \ | |
1292 | return count; \ | |
1293 | } | |
1294 | ||
1da177e4 LT |
1295 | #define fc_host_rd_attr(field, format_string, sz) \ |
1296 | fc_host_show_function(field, format_string, sz, ) \ | |
1297 | static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO, \ | |
1298 | show_fc_host_##field, NULL) | |
1299 | ||
1300 | #define fc_host_rd_attr_cast(field, format_string, sz, cast) \ | |
1301 | fc_host_show_function(field, format_string, sz, (cast)) \ | |
1302 | static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO, \ | |
1303 | show_fc_host_##field, NULL) | |
1304 | ||
1305 | #define fc_host_rw_attr(field, format_string, sz) \ | |
1306 | fc_host_show_function(field, format_string, sz, ) \ | |
1307 | fc_host_store_function(field) \ | |
1308 | static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO | S_IWUSR, \ | |
1309 | show_fc_host_##field, \ | |
1310 | store_fc_host_##field) | |
1311 | ||
1312 | #define fc_host_rd_enum_attr(title, maxlen) \ | |
1313 | static ssize_t \ | |
1314 | show_fc_host_##title (struct class_device *cdev, char *buf) \ | |
1315 | { \ | |
1316 | struct Scsi_Host *shost = transport_class_to_shost(cdev); \ | |
1317 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
1318 | const char *name; \ | |
1319 | if (i->f->get_host_##title) \ | |
1320 | i->f->get_host_##title(shost); \ | |
1321 | name = get_fc_##title##_name(fc_host_##title(shost)); \ | |
1322 | if (!name) \ | |
1323 | return -EINVAL; \ | |
1324 | return snprintf(buf, maxlen, "%s\n", name); \ | |
1325 | } \ | |
1326 | static FC_CLASS_DEVICE_ATTR(host, title, S_IRUGO, show_fc_host_##title, NULL) | |
1327 | ||
1328 | #define SETUP_HOST_ATTRIBUTE_RD(field) \ | |
1329 | i->private_host_attrs[count] = class_device_attr_host_##field; \ | |
1330 | i->private_host_attrs[count].attr.mode = S_IRUGO; \ | |
1331 | i->private_host_attrs[count].store = NULL; \ | |
1332 | i->host_attrs[count] = &i->private_host_attrs[count]; \ | |
1333 | if (i->f->show_host_##field) \ | |
1334 | count++ | |
1335 | ||
a53eb5e0 JS |
1336 | #define SETUP_HOST_ATTRIBUTE_RD_NS(field) \ |
1337 | i->private_host_attrs[count] = class_device_attr_host_##field; \ | |
1338 | i->private_host_attrs[count].attr.mode = S_IRUGO; \ | |
1339 | i->private_host_attrs[count].store = NULL; \ | |
1340 | i->host_attrs[count] = &i->private_host_attrs[count]; \ | |
1341 | count++ | |
1342 | ||
1da177e4 LT |
1343 | #define SETUP_HOST_ATTRIBUTE_RW(field) \ |
1344 | i->private_host_attrs[count] = class_device_attr_host_##field; \ | |
1345 | if (!i->f->set_host_##field) { \ | |
1346 | i->private_host_attrs[count].attr.mode = S_IRUGO; \ | |
1347 | i->private_host_attrs[count].store = NULL; \ | |
1348 | } \ | |
1349 | i->host_attrs[count] = &i->private_host_attrs[count]; \ | |
1350 | if (i->f->show_host_##field) \ | |
1351 | count++ | |
1352 | ||
1353 | ||
1354 | #define fc_private_host_show_function(field, format_string, sz, cast) \ | |
1355 | static ssize_t \ | |
1356 | show_fc_host_##field (struct class_device *cdev, char *buf) \ | |
1357 | { \ | |
1358 | struct Scsi_Host *shost = transport_class_to_shost(cdev); \ | |
1359 | return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \ | |
1360 | } | |
1361 | ||
1362 | #define fc_private_host_rd_attr(field, format_string, sz) \ | |
1363 | fc_private_host_show_function(field, format_string, sz, ) \ | |
1364 | static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO, \ | |
1365 | show_fc_host_##field, NULL) | |
1366 | ||
1367 | #define fc_private_host_rd_attr_cast(field, format_string, sz, cast) \ | |
1368 | fc_private_host_show_function(field, format_string, sz, (cast)) \ | |
1369 | static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO, \ | |
1370 | show_fc_host_##field, NULL) | |
1371 | ||
1372 | #define SETUP_PRIVATE_HOST_ATTRIBUTE_RD(field) \ | |
1373 | i->private_host_attrs[count] = class_device_attr_host_##field; \ | |
1374 | i->private_host_attrs[count].attr.mode = S_IRUGO; \ | |
1375 | i->private_host_attrs[count].store = NULL; \ | |
1376 | i->host_attrs[count] = &i->private_host_attrs[count]; \ | |
1377 | count++ | |
1378 | ||
1379 | #define SETUP_PRIVATE_HOST_ATTRIBUTE_RW(field) \ | |
91ca7b01 | 1380 | { \ |
1da177e4 LT |
1381 | i->private_host_attrs[count] = class_device_attr_host_##field; \ |
1382 | i->host_attrs[count] = &i->private_host_attrs[count]; \ | |
91ca7b01 AV |
1383 | count++; \ |
1384 | } | |
1da177e4 LT |
1385 | |
1386 | ||
1387 | /* Fixed Host Attributes */ | |
1388 | ||
1389 | static ssize_t | |
1390 | show_fc_host_supported_classes (struct class_device *cdev, char *buf) | |
1391 | { | |
1392 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
1393 | ||
1394 | if (fc_host_supported_classes(shost) == FC_COS_UNSPECIFIED) | |
1395 | return snprintf(buf, 20, "unspecified\n"); | |
1396 | ||
1397 | return get_fc_cos_names(fc_host_supported_classes(shost), buf); | |
1398 | } | |
1399 | static FC_CLASS_DEVICE_ATTR(host, supported_classes, S_IRUGO, | |
1400 | show_fc_host_supported_classes, NULL); | |
1401 | ||
1402 | static ssize_t | |
1403 | show_fc_host_supported_fc4s (struct class_device *cdev, char *buf) | |
1404 | { | |
1405 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
1406 | return (ssize_t)show_fc_fc4s(buf, fc_host_supported_fc4s(shost)); | |
1407 | } | |
1408 | static FC_CLASS_DEVICE_ATTR(host, supported_fc4s, S_IRUGO, | |
1409 | show_fc_host_supported_fc4s, NULL); | |
1410 | ||
1411 | static ssize_t | |
1412 | show_fc_host_supported_speeds (struct class_device *cdev, char *buf) | |
1413 | { | |
1414 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
1415 | ||
1416 | if (fc_host_supported_speeds(shost) == FC_PORTSPEED_UNKNOWN) | |
1417 | return snprintf(buf, 20, "unknown\n"); | |
1418 | ||
1419 | return get_fc_port_speed_names(fc_host_supported_speeds(shost), buf); | |
1420 | } | |
1421 | static FC_CLASS_DEVICE_ATTR(host, supported_speeds, S_IRUGO, | |
1422 | show_fc_host_supported_speeds, NULL); | |
1423 | ||
1424 | ||
1425 | fc_private_host_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); | |
1426 | fc_private_host_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); | |
6b7281d0 AH |
1427 | fc_private_host_rd_attr_cast(permanent_port_name, "0x%llx\n", 20, |
1428 | unsigned long long); | |
1da177e4 | 1429 | fc_private_host_rd_attr(maxframe_size, "%u bytes\n", 20); |
a53eb5e0 | 1430 | fc_private_host_rd_attr(max_npiv_vports, "%u\n", 20); |
1da177e4 LT |
1431 | fc_private_host_rd_attr(serial_number, "%s\n", (FC_SERIAL_NUMBER_SIZE +1)); |
1432 | ||
1433 | ||
1434 | /* Dynamic Host Attributes */ | |
1435 | ||
1436 | static ssize_t | |
1437 | show_fc_host_active_fc4s (struct class_device *cdev, char *buf) | |
1438 | { | |
1439 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
1440 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
1441 | ||
1442 | if (i->f->get_host_active_fc4s) | |
1443 | i->f->get_host_active_fc4s(shost); | |
1444 | ||
1445 | return (ssize_t)show_fc_fc4s(buf, fc_host_active_fc4s(shost)); | |
1446 | } | |
1447 | static FC_CLASS_DEVICE_ATTR(host, active_fc4s, S_IRUGO, | |
1448 | show_fc_host_active_fc4s, NULL); | |
1449 | ||
1450 | static ssize_t | |
1451 | show_fc_host_speed (struct class_device *cdev, char *buf) | |
1452 | { | |
1453 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
1454 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
1455 | ||
1456 | if (i->f->get_host_speed) | |
1457 | i->f->get_host_speed(shost); | |
1458 | ||
1459 | if (fc_host_speed(shost) == FC_PORTSPEED_UNKNOWN) | |
1460 | return snprintf(buf, 20, "unknown\n"); | |
1461 | ||
1462 | return get_fc_port_speed_names(fc_host_speed(shost), buf); | |
1463 | } | |
1464 | static FC_CLASS_DEVICE_ATTR(host, speed, S_IRUGO, | |
1465 | show_fc_host_speed, NULL); | |
1466 | ||
1467 | ||
1468 | fc_host_rd_attr(port_id, "0x%06x\n", 20); | |
1469 | fc_host_rd_enum_attr(port_type, FC_PORTTYPE_MAX_NAMELEN); | |
1470 | fc_host_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN); | |
1471 | fc_host_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long); | |
016131b8 | 1472 | fc_host_rd_attr(symbolic_name, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1); |
1da177e4 | 1473 | |
b8d08210 JS |
1474 | fc_private_host_show_function(system_hostname, "%s\n", |
1475 | FC_SYMBOLIC_NAME_SIZE + 1, ) | |
1476 | fc_host_store_str_function(system_hostname, FC_SYMBOLIC_NAME_SIZE) | |
1477 | static FC_CLASS_DEVICE_ATTR(host, system_hostname, S_IRUGO | S_IWUSR, | |
1478 | show_fc_host_system_hostname, store_fc_host_system_hostname); | |
1479 | ||
1da177e4 LT |
1480 | |
1481 | /* Private Host Attributes */ | |
1482 | ||
1483 | static ssize_t | |
1484 | show_fc_private_host_tgtid_bind_type(struct class_device *cdev, char *buf) | |
1485 | { | |
1486 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
1487 | const char *name; | |
1488 | ||
1489 | name = get_fc_tgtid_bind_type_name(fc_host_tgtid_bind_type(shost)); | |
1490 | if (!name) | |
1491 | return -EINVAL; | |
1492 | return snprintf(buf, FC_BINDTYPE_MAX_NAMELEN, "%s\n", name); | |
1493 | } | |
1494 | ||
d16794f6 JSEC |
1495 | #define get_list_head_entry(pos, head, member) \ |
1496 | pos = list_entry((head)->next, typeof(*pos), member) | |
1497 | ||
1da177e4 LT |
1498 | static ssize_t |
1499 | store_fc_private_host_tgtid_bind_type(struct class_device *cdev, | |
1500 | const char *buf, size_t count) | |
1501 | { | |
1502 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
d16794f6 | 1503 | struct fc_rport *rport; |
1da177e4 LT |
1504 | enum fc_tgtid_binding_type val; |
1505 | unsigned long flags; | |
1506 | ||
1507 | if (get_fc_tgtid_bind_type_match(buf, &val)) | |
1508 | return -EINVAL; | |
1509 | ||
1510 | /* if changing bind type, purge all unused consistent bindings */ | |
1511 | if (val != fc_host_tgtid_bind_type(shost)) { | |
1512 | spin_lock_irqsave(shost->host_lock, flags); | |
d16794f6 JSEC |
1513 | while (!list_empty(&fc_host_rport_bindings(shost))) { |
1514 | get_list_head_entry(rport, | |
1515 | &fc_host_rport_bindings(shost), peers); | |
aedf3497 JS |
1516 | list_del(&rport->peers); |
1517 | rport->port_state = FC_PORTSTATE_DELETED; | |
1518 | fc_queue_work(shost, &rport->rport_delete_work); | |
d16794f6 | 1519 | } |
1da177e4 LT |
1520 | spin_unlock_irqrestore(shost->host_lock, flags); |
1521 | } | |
1522 | ||
1523 | fc_host_tgtid_bind_type(shost) = val; | |
1524 | return count; | |
1525 | } | |
1526 | ||
1527 | static FC_CLASS_DEVICE_ATTR(host, tgtid_bind_type, S_IRUGO | S_IWUSR, | |
1528 | show_fc_private_host_tgtid_bind_type, | |
1529 | store_fc_private_host_tgtid_bind_type); | |
1530 | ||
91ca7b01 AV |
1531 | static ssize_t |
1532 | store_fc_private_host_issue_lip(struct class_device *cdev, | |
1533 | const char *buf, size_t count) | |
1534 | { | |
1535 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
1536 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
1537 | int ret; | |
1538 | ||
1539 | /* ignore any data value written to the attribute */ | |
1540 | if (i->f->issue_fc_host_lip) { | |
1541 | ret = i->f->issue_fc_host_lip(shost); | |
1542 | return ret ? ret: count; | |
1543 | } | |
1544 | ||
1545 | return -ENOENT; | |
1546 | } | |
1547 | ||
1548 | static FC_CLASS_DEVICE_ATTR(host, issue_lip, S_IWUSR, NULL, | |
1549 | store_fc_private_host_issue_lip); | |
1550 | ||
a53eb5e0 JS |
1551 | fc_private_host_rd_attr(npiv_vports_inuse, "%u\n", 20); |
1552 | ||
1553 | ||
1da177e4 LT |
1554 | /* |
1555 | * Host Statistics Management | |
1556 | */ | |
1557 | ||
1558 | /* Show a given an attribute in the statistics group */ | |
1559 | static ssize_t | |
1560 | fc_stat_show(const struct class_device *cdev, char *buf, unsigned long offset) | |
1561 | { | |
1562 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
1563 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
1564 | struct fc_host_statistics *stats; | |
1565 | ssize_t ret = -ENOENT; | |
1566 | ||
1567 | if (offset > sizeof(struct fc_host_statistics) || | |
1568 | offset % sizeof(u64) != 0) | |
1569 | WARN_ON(1); | |
1570 | ||
1571 | if (i->f->get_fc_host_stats) { | |
1572 | stats = (i->f->get_fc_host_stats)(shost); | |
1573 | if (stats) | |
1574 | ret = snprintf(buf, 20, "0x%llx\n", | |
1575 | (unsigned long long)*(u64 *)(((u8 *) stats) + offset)); | |
1576 | } | |
1577 | return ret; | |
1578 | } | |
1579 | ||
1580 | ||
1581 | /* generate a read-only statistics attribute */ | |
1582 | #define fc_host_statistic(name) \ | |
1583 | static ssize_t show_fcstat_##name(struct class_device *cd, char *buf) \ | |
1584 | { \ | |
1585 | return fc_stat_show(cd, buf, \ | |
1586 | offsetof(struct fc_host_statistics, name)); \ | |
1587 | } \ | |
1588 | static FC_CLASS_DEVICE_ATTR(host, name, S_IRUGO, show_fcstat_##name, NULL) | |
1589 | ||
1590 | fc_host_statistic(seconds_since_last_reset); | |
1591 | fc_host_statistic(tx_frames); | |
1592 | fc_host_statistic(tx_words); | |
1593 | fc_host_statistic(rx_frames); | |
1594 | fc_host_statistic(rx_words); | |
1595 | fc_host_statistic(lip_count); | |
1596 | fc_host_statistic(nos_count); | |
1597 | fc_host_statistic(error_frames); | |
1598 | fc_host_statistic(dumped_frames); | |
1599 | fc_host_statistic(link_failure_count); | |
1600 | fc_host_statistic(loss_of_sync_count); | |
1601 | fc_host_statistic(loss_of_signal_count); | |
1602 | fc_host_statistic(prim_seq_protocol_err_count); | |
1603 | fc_host_statistic(invalid_tx_word_count); | |
1604 | fc_host_statistic(invalid_crc_count); | |
1605 | fc_host_statistic(fcp_input_requests); | |
1606 | fc_host_statistic(fcp_output_requests); | |
1607 | fc_host_statistic(fcp_control_requests); | |
1608 | fc_host_statistic(fcp_input_megabytes); | |
1609 | fc_host_statistic(fcp_output_megabytes); | |
1610 | ||
1611 | static ssize_t | |
1612 | fc_reset_statistics(struct class_device *cdev, const char *buf, | |
1613 | size_t count) | |
1614 | { | |
1615 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
1616 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
1617 | ||
1618 | /* ignore any data value written to the attribute */ | |
1619 | if (i->f->reset_fc_host_stats) { | |
1620 | i->f->reset_fc_host_stats(shost); | |
1621 | return count; | |
1622 | } | |
1623 | ||
1624 | return -ENOENT; | |
1625 | } | |
1626 | static FC_CLASS_DEVICE_ATTR(host, reset_statistics, S_IWUSR, NULL, | |
1627 | fc_reset_statistics); | |
1628 | ||
1da177e4 LT |
1629 | static struct attribute *fc_statistics_attrs[] = { |
1630 | &class_device_attr_host_seconds_since_last_reset.attr, | |
1631 | &class_device_attr_host_tx_frames.attr, | |
1632 | &class_device_attr_host_tx_words.attr, | |
1633 | &class_device_attr_host_rx_frames.attr, | |
1634 | &class_device_attr_host_rx_words.attr, | |
1635 | &class_device_attr_host_lip_count.attr, | |
1636 | &class_device_attr_host_nos_count.attr, | |
1637 | &class_device_attr_host_error_frames.attr, | |
1638 | &class_device_attr_host_dumped_frames.attr, | |
1639 | &class_device_attr_host_link_failure_count.attr, | |
1640 | &class_device_attr_host_loss_of_sync_count.attr, | |
1641 | &class_device_attr_host_loss_of_signal_count.attr, | |
1642 | &class_device_attr_host_prim_seq_protocol_err_count.attr, | |
1643 | &class_device_attr_host_invalid_tx_word_count.attr, | |
1644 | &class_device_attr_host_invalid_crc_count.attr, | |
1645 | &class_device_attr_host_fcp_input_requests.attr, | |
1646 | &class_device_attr_host_fcp_output_requests.attr, | |
1647 | &class_device_attr_host_fcp_control_requests.attr, | |
1648 | &class_device_attr_host_fcp_input_megabytes.attr, | |
1649 | &class_device_attr_host_fcp_output_megabytes.attr, | |
1650 | &class_device_attr_host_reset_statistics.attr, | |
1651 | NULL | |
1652 | }; | |
1653 | ||
1654 | static struct attribute_group fc_statistics_group = { | |
1655 | .name = "statistics", | |
1656 | .attrs = fc_statistics_attrs, | |
1657 | }; | |
1658 | ||
a53eb5e0 JS |
1659 | |
1660 | /* Host Vport Attributes */ | |
1661 | ||
1662 | static int | |
1663 | fc_parse_wwn(const char *ns, u64 *nm) | |
1664 | { | |
1665 | unsigned int i, j; | |
1666 | u8 wwn[8]; | |
1667 | ||
1668 | memset(wwn, 0, sizeof(wwn)); | |
1669 | ||
1670 | /* Validate and store the new name */ | |
1671 | for (i=0, j=0; i < 16; i++) { | |
1672 | if ((*ns >= 'a') && (*ns <= 'f')) | |
1673 | j = ((j << 4) | ((*ns++ -'a') + 10)); | |
1674 | else if ((*ns >= 'A') && (*ns <= 'F')) | |
1675 | j = ((j << 4) | ((*ns++ -'A') + 10)); | |
1676 | else if ((*ns >= '0') && (*ns <= '9')) | |
1677 | j = ((j << 4) | (*ns++ -'0')); | |
1678 | else | |
1679 | return -EINVAL; | |
1680 | if (i % 2) { | |
1681 | wwn[i/2] = j & 0xff; | |
1682 | j = 0; | |
1683 | } | |
1684 | } | |
1685 | ||
1686 | *nm = wwn_to_u64(wwn); | |
1687 | ||
1688 | return 0; | |
1689 | } | |
1690 | ||
1691 | ||
1692 | /* | |
1693 | * "Short-cut" sysfs variable to create a new vport on a FC Host. | |
1694 | * Input is a string of the form "<WWPN>:<WWNN>". Other attributes | |
1695 | * will default to a NPIV-based FCP_Initiator; The WWNs are specified | |
1696 | * as hex characters, and may *not* contain any prefixes (e.g. 0x, x, etc) | |
1697 | */ | |
1698 | static ssize_t | |
1699 | store_fc_host_vport_create(struct class_device *cdev, const char *buf, | |
1700 | size_t count) | |
1701 | { | |
1702 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
1703 | struct fc_vport_identifiers vid; | |
1704 | struct fc_vport *vport; | |
1705 | unsigned int cnt=count; | |
1706 | int stat; | |
1707 | ||
1708 | memset(&vid, 0, sizeof(vid)); | |
1709 | ||
1710 | /* count may include a LF at end of string */ | |
1711 | if (buf[cnt-1] == '\n') | |
1712 | cnt--; | |
1713 | ||
1714 | /* validate we have enough characters for WWPN */ | |
1715 | if ((cnt != (16+1+16)) || (buf[16] != ':')) | |
1716 | return -EINVAL; | |
1717 | ||
1718 | stat = fc_parse_wwn(&buf[0], &vid.port_name); | |
1719 | if (stat) | |
1720 | return stat; | |
1721 | ||
1722 | stat = fc_parse_wwn(&buf[17], &vid.node_name); | |
1723 | if (stat) | |
1724 | return stat; | |
1725 | ||
1726 | vid.roles = FC_PORT_ROLE_FCP_INITIATOR; | |
1727 | vid.vport_type = FC_PORTTYPE_NPIV; | |
1728 | /* vid.symbolic_name is already zero/NULL's */ | |
1729 | vid.disable = false; /* always enabled */ | |
1730 | ||
1731 | /* we only allow support on Channel 0 !!! */ | |
1732 | stat = fc_vport_create(shost, 0, &shost->shost_gendev, &vid, &vport); | |
1733 | return stat ? stat : count; | |
1734 | } | |
1735 | static FC_CLASS_DEVICE_ATTR(host, vport_create, S_IWUSR, NULL, | |
1736 | store_fc_host_vport_create); | |
1737 | ||
1738 | ||
1739 | /* | |
1740 | * "Short-cut" sysfs variable to delete a vport on a FC Host. | |
1741 | * Vport is identified by a string containing "<WWPN>:<WWNN>". | |
1742 | * The WWNs are specified as hex characters, and may *not* contain | |
1743 | * any prefixes (e.g. 0x, x, etc) | |
1744 | */ | |
1745 | static ssize_t | |
1746 | store_fc_host_vport_delete(struct class_device *cdev, const char *buf, | |
1747 | size_t count) | |
1748 | { | |
1749 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
1750 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); | |
1751 | struct fc_vport *vport; | |
1752 | u64 wwpn, wwnn; | |
1753 | unsigned long flags; | |
1754 | unsigned int cnt=count; | |
1755 | int stat, match; | |
1756 | ||
1757 | /* count may include a LF at end of string */ | |
1758 | if (buf[cnt-1] == '\n') | |
1759 | cnt--; | |
1760 | ||
1761 | /* validate we have enough characters for WWPN */ | |
1762 | if ((cnt != (16+1+16)) || (buf[16] != ':')) | |
1763 | return -EINVAL; | |
1764 | ||
1765 | stat = fc_parse_wwn(&buf[0], &wwpn); | |
1766 | if (stat) | |
1767 | return stat; | |
1768 | ||
1769 | stat = fc_parse_wwn(&buf[17], &wwnn); | |
1770 | if (stat) | |
1771 | return stat; | |
1772 | ||
1773 | spin_lock_irqsave(shost->host_lock, flags); | |
1774 | match = 0; | |
1775 | /* we only allow support on Channel 0 !!! */ | |
1776 | list_for_each_entry(vport, &fc_host->vports, peers) { | |
1777 | if ((vport->channel == 0) && | |
1778 | (vport->port_name == wwpn) && (vport->node_name == wwnn)) { | |
1779 | match = 1; | |
1780 | break; | |
1781 | } | |
1782 | } | |
1783 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1784 | ||
1785 | if (!match) | |
1786 | return -ENODEV; | |
1787 | ||
1788 | stat = fc_vport_terminate(vport); | |
1789 | return stat ? stat : count; | |
1790 | } | |
1791 | static FC_CLASS_DEVICE_ATTR(host, vport_delete, S_IWUSR, NULL, | |
1792 | store_fc_host_vport_delete); | |
1793 | ||
1794 | ||
1da177e4 LT |
1795 | static int fc_host_match(struct attribute_container *cont, |
1796 | struct device *dev) | |
1797 | { | |
1798 | struct Scsi_Host *shost; | |
1799 | struct fc_internal *i; | |
1800 | ||
1801 | if (!scsi_is_host_device(dev)) | |
1802 | return 0; | |
1803 | ||
1804 | shost = dev_to_shost(dev); | |
1805 | if (!shost->transportt || shost->transportt->host_attrs.ac.class | |
1806 | != &fc_host_class.class) | |
1807 | return 0; | |
1808 | ||
1809 | i = to_fc_internal(shost->transportt); | |
1810 | ||
1811 | return &i->t.host_attrs.ac == cont; | |
1812 | } | |
1813 | ||
1814 | static int fc_target_match(struct attribute_container *cont, | |
1815 | struct device *dev) | |
1816 | { | |
1817 | struct Scsi_Host *shost; | |
1818 | struct fc_internal *i; | |
1819 | ||
1820 | if (!scsi_is_target_device(dev)) | |
1821 | return 0; | |
1822 | ||
1823 | shost = dev_to_shost(dev->parent); | |
1824 | if (!shost->transportt || shost->transportt->host_attrs.ac.class | |
1825 | != &fc_host_class.class) | |
1826 | return 0; | |
1827 | ||
1828 | i = to_fc_internal(shost->transportt); | |
1829 | ||
1830 | return &i->t.target_attrs.ac == cont; | |
1831 | } | |
1832 | ||
1833 | static void fc_rport_dev_release(struct device *dev) | |
1834 | { | |
1835 | struct fc_rport *rport = dev_to_rport(dev); | |
1836 | put_device(dev->parent); | |
1837 | kfree(rport); | |
1838 | } | |
1839 | ||
1840 | int scsi_is_fc_rport(const struct device *dev) | |
1841 | { | |
1842 | return dev->release == fc_rport_dev_release; | |
1843 | } | |
1844 | EXPORT_SYMBOL(scsi_is_fc_rport); | |
1845 | ||
1846 | static int fc_rport_match(struct attribute_container *cont, | |
1847 | struct device *dev) | |
1848 | { | |
1849 | struct Scsi_Host *shost; | |
1850 | struct fc_internal *i; | |
1851 | ||
1852 | if (!scsi_is_fc_rport(dev)) | |
1853 | return 0; | |
1854 | ||
1855 | shost = dev_to_shost(dev->parent); | |
1856 | if (!shost->transportt || shost->transportt->host_attrs.ac.class | |
1857 | != &fc_host_class.class) | |
1858 | return 0; | |
1859 | ||
1860 | i = to_fc_internal(shost->transportt); | |
1861 | ||
1862 | return &i->rport_attr_cont.ac == cont; | |
1863 | } | |
1864 | ||
5c44cd2a | 1865 | |
a53eb5e0 JS |
1866 | static void fc_vport_dev_release(struct device *dev) |
1867 | { | |
1868 | struct fc_vport *vport = dev_to_vport(dev); | |
1869 | put_device(dev->parent); /* release kobj parent */ | |
1870 | kfree(vport); | |
1871 | } | |
1872 | ||
1873 | int scsi_is_fc_vport(const struct device *dev) | |
1874 | { | |
1875 | return dev->release == fc_vport_dev_release; | |
1876 | } | |
1877 | EXPORT_SYMBOL(scsi_is_fc_vport); | |
1878 | ||
1879 | static int fc_vport_match(struct attribute_container *cont, | |
1880 | struct device *dev) | |
1881 | { | |
1882 | struct fc_vport *vport; | |
1883 | struct Scsi_Host *shost; | |
1884 | struct fc_internal *i; | |
1885 | ||
1886 | if (!scsi_is_fc_vport(dev)) | |
1887 | return 0; | |
1888 | vport = dev_to_vport(dev); | |
1889 | ||
1890 | shost = vport_to_shost(vport); | |
1891 | if (!shost->transportt || shost->transportt->host_attrs.ac.class | |
1892 | != &fc_host_class.class) | |
1893 | return 0; | |
1894 | ||
1895 | i = to_fc_internal(shost->transportt); | |
1896 | return &i->vport_attr_cont.ac == cont; | |
1897 | } | |
1898 | ||
1899 | ||
c829c394 JS |
1900 | /** |
1901 | * fc_timed_out - FC Transport I/O timeout intercept handler | |
1902 | * | |
1903 | * @scmd: The SCSI command which timed out | |
1904 | * | |
1905 | * This routine protects against error handlers getting invoked while a | |
1906 | * rport is in a blocked state, typically due to a temporarily loss of | |
1907 | * connectivity. If the error handlers are allowed to proceed, requests | |
1908 | * to abort i/o, reset the target, etc will likely fail as there is no way | |
1909 | * to communicate with the device to perform the requested function. These | |
1910 | * failures may result in the midlayer taking the device offline, requiring | |
1911 | * manual intervention to restore operation. | |
1912 | * | |
1913 | * This routine, called whenever an i/o times out, validates the state of | |
1914 | * the underlying rport. If the rport is blocked, it returns | |
1915 | * EH_RESET_TIMER, which will continue to reschedule the timeout. | |
1916 | * Eventually, either the device will return, or devloss_tmo will fire, | |
1917 | * and when the timeout then fires, it will be handled normally. | |
1918 | * If the rport is not blocked, normal error handling continues. | |
1919 | * | |
1920 | * Notes: | |
1921 | * This routine assumes no locks are held on entry. | |
1922 | **/ | |
1923 | static enum scsi_eh_timer_return | |
1924 | fc_timed_out(struct scsi_cmnd *scmd) | |
1925 | { | |
1926 | struct fc_rport *rport = starget_to_rport(scsi_target(scmd->device)); | |
1927 | ||
1928 | if (rport->port_state == FC_PORTSTATE_BLOCKED) | |
1929 | return EH_RESET_TIMER; | |
1930 | ||
1931 | return EH_NOT_HANDLED; | |
1932 | } | |
1933 | ||
5c44cd2a JSEC |
1934 | /* |
1935 | * Must be called with shost->host_lock held | |
1936 | */ | |
e02f3f59 CH |
1937 | static int fc_user_scan(struct Scsi_Host *shost, uint channel, |
1938 | uint id, uint lun) | |
5c44cd2a JSEC |
1939 | { |
1940 | struct fc_rport *rport; | |
1941 | ||
e02f3f59 CH |
1942 | list_for_each_entry(rport, &fc_host_rports(shost), peers) { |
1943 | if (rport->scsi_target_id == -1) | |
1944 | continue; | |
5c44cd2a | 1945 | |
e02f3f59 CH |
1946 | if ((channel == SCAN_WILD_CARD || channel == rport->channel) && |
1947 | (id == SCAN_WILD_CARD || id == rport->scsi_target_id)) { | |
1948 | scsi_scan_target(&rport->dev, rport->channel, | |
1949 | rport->scsi_target_id, lun, 1); | |
1950 | } | |
1951 | } | |
1952 | ||
1953 | return 0; | |
5c44cd2a JSEC |
1954 | } |
1955 | ||
1da177e4 LT |
1956 | struct scsi_transport_template * |
1957 | fc_attach_transport(struct fc_function_template *ft) | |
1958 | { | |
1da177e4 | 1959 | int count; |
24669f75 JS |
1960 | struct fc_internal *i = kzalloc(sizeof(struct fc_internal), |
1961 | GFP_KERNEL); | |
1da177e4 LT |
1962 | |
1963 | if (unlikely(!i)) | |
1964 | return NULL; | |
1965 | ||
1da177e4 LT |
1966 | i->t.target_attrs.ac.attrs = &i->starget_attrs[0]; |
1967 | i->t.target_attrs.ac.class = &fc_transport_class.class; | |
1968 | i->t.target_attrs.ac.match = fc_target_match; | |
1969 | i->t.target_size = sizeof(struct fc_starget_attrs); | |
1970 | transport_container_register(&i->t.target_attrs); | |
1971 | ||
1972 | i->t.host_attrs.ac.attrs = &i->host_attrs[0]; | |
1973 | i->t.host_attrs.ac.class = &fc_host_class.class; | |
1974 | i->t.host_attrs.ac.match = fc_host_match; | |
1975 | i->t.host_size = sizeof(struct fc_host_attrs); | |
1976 | if (ft->get_fc_host_stats) | |
1977 | i->t.host_attrs.statistics = &fc_statistics_group; | |
1978 | transport_container_register(&i->t.host_attrs); | |
1979 | ||
1980 | i->rport_attr_cont.ac.attrs = &i->rport_attrs[0]; | |
1981 | i->rport_attr_cont.ac.class = &fc_rport_class.class; | |
1982 | i->rport_attr_cont.ac.match = fc_rport_match; | |
1983 | transport_container_register(&i->rport_attr_cont); | |
1984 | ||
a53eb5e0 JS |
1985 | i->vport_attr_cont.ac.attrs = &i->vport_attrs[0]; |
1986 | i->vport_attr_cont.ac.class = &fc_vport_class.class; | |
1987 | i->vport_attr_cont.ac.match = fc_vport_match; | |
1988 | transport_container_register(&i->vport_attr_cont); | |
1989 | ||
1da177e4 LT |
1990 | i->f = ft; |
1991 | ||
1992 | /* Transport uses the shost workq for scsi scanning */ | |
1993 | i->t.create_work_queue = 1; | |
5c44cd2a | 1994 | |
c829c394 JS |
1995 | i->t.eh_timed_out = fc_timed_out; |
1996 | ||
e02f3f59 | 1997 | i->t.user_scan = fc_user_scan; |
9ef3e4a4 | 1998 | |
1da177e4 LT |
1999 | /* |
2000 | * Setup SCSI Target Attributes. | |
2001 | */ | |
2002 | count = 0; | |
2003 | SETUP_STARGET_ATTRIBUTE_RD(node_name); | |
2004 | SETUP_STARGET_ATTRIBUTE_RD(port_name); | |
2005 | SETUP_STARGET_ATTRIBUTE_RD(port_id); | |
2006 | ||
2007 | BUG_ON(count > FC_STARGET_NUM_ATTRS); | |
2008 | ||
2009 | i->starget_attrs[count] = NULL; | |
2010 | ||
2011 | ||
2012 | /* | |
2013 | * Setup SCSI Host Attributes. | |
2014 | */ | |
2015 | count=0; | |
2016 | SETUP_HOST_ATTRIBUTE_RD(node_name); | |
2017 | SETUP_HOST_ATTRIBUTE_RD(port_name); | |
6b7281d0 | 2018 | SETUP_HOST_ATTRIBUTE_RD(permanent_port_name); |
1da177e4 LT |
2019 | SETUP_HOST_ATTRIBUTE_RD(supported_classes); |
2020 | SETUP_HOST_ATTRIBUTE_RD(supported_fc4s); | |
1da177e4 LT |
2021 | SETUP_HOST_ATTRIBUTE_RD(supported_speeds); |
2022 | SETUP_HOST_ATTRIBUTE_RD(maxframe_size); | |
a53eb5e0 JS |
2023 | if (ft->vport_create) { |
2024 | SETUP_HOST_ATTRIBUTE_RD_NS(max_npiv_vports); | |
2025 | SETUP_HOST_ATTRIBUTE_RD_NS(npiv_vports_inuse); | |
2026 | } | |
1da177e4 LT |
2027 | SETUP_HOST_ATTRIBUTE_RD(serial_number); |
2028 | ||
2029 | SETUP_HOST_ATTRIBUTE_RD(port_id); | |
2030 | SETUP_HOST_ATTRIBUTE_RD(port_type); | |
2031 | SETUP_HOST_ATTRIBUTE_RD(port_state); | |
2032 | SETUP_HOST_ATTRIBUTE_RD(active_fc4s); | |
2033 | SETUP_HOST_ATTRIBUTE_RD(speed); | |
2034 | SETUP_HOST_ATTRIBUTE_RD(fabric_name); | |
016131b8 | 2035 | SETUP_HOST_ATTRIBUTE_RD(symbolic_name); |
b8d08210 | 2036 | SETUP_HOST_ATTRIBUTE_RW(system_hostname); |
1da177e4 LT |
2037 | |
2038 | /* Transport-managed attributes */ | |
2039 | SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type); | |
91ca7b01 AV |
2040 | if (ft->issue_fc_host_lip) |
2041 | SETUP_PRIVATE_HOST_ATTRIBUTE_RW(issue_lip); | |
a53eb5e0 JS |
2042 | if (ft->vport_create) |
2043 | SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_create); | |
2044 | if (ft->vport_delete) | |
2045 | SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_delete); | |
1da177e4 LT |
2046 | |
2047 | BUG_ON(count > FC_HOST_NUM_ATTRS); | |
2048 | ||
2049 | i->host_attrs[count] = NULL; | |
2050 | ||
2051 | /* | |
2052 | * Setup Remote Port Attributes. | |
2053 | */ | |
2054 | count=0; | |
2055 | SETUP_RPORT_ATTRIBUTE_RD(maxframe_size); | |
2056 | SETUP_RPORT_ATTRIBUTE_RD(supported_classes); | |
2057 | SETUP_RPORT_ATTRIBUTE_RW(dev_loss_tmo); | |
2058 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(node_name); | |
2059 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_name); | |
2060 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_id); | |
2061 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(roles); | |
2062 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_state); | |
2063 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(scsi_target_id); | |
0f29b966 JS |
2064 | if (ft->terminate_rport_io) |
2065 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(fast_io_fail_tmo); | |
1da177e4 LT |
2066 | |
2067 | BUG_ON(count > FC_RPORT_NUM_ATTRS); | |
2068 | ||
2069 | i->rport_attrs[count] = NULL; | |
2070 | ||
a53eb5e0 JS |
2071 | /* |
2072 | * Setup Virtual Port Attributes. | |
2073 | */ | |
2074 | count=0; | |
2075 | SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_state); | |
2076 | SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_last_state); | |
2077 | SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(node_name); | |
2078 | SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(port_name); | |
2079 | SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(roles); | |
2080 | SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_type); | |
2081 | SETUP_VPORT_ATTRIBUTE_RW(symbolic_name); | |
2082 | SETUP_VPORT_ATTRIBUTE_WR(vport_delete); | |
2083 | SETUP_VPORT_ATTRIBUTE_WR(vport_disable); | |
2084 | ||
2085 | BUG_ON(count > FC_VPORT_NUM_ATTRS); | |
2086 | ||
2087 | i->vport_attrs[count] = NULL; | |
2088 | ||
1da177e4 LT |
2089 | return &i->t; |
2090 | } | |
2091 | EXPORT_SYMBOL(fc_attach_transport); | |
2092 | ||
2093 | void fc_release_transport(struct scsi_transport_template *t) | |
2094 | { | |
2095 | struct fc_internal *i = to_fc_internal(t); | |
2096 | ||
2097 | transport_container_unregister(&i->t.target_attrs); | |
2098 | transport_container_unregister(&i->t.host_attrs); | |
2099 | transport_container_unregister(&i->rport_attr_cont); | |
a53eb5e0 | 2100 | transport_container_unregister(&i->vport_attr_cont); |
1da177e4 LT |
2101 | |
2102 | kfree(i); | |
2103 | } | |
2104 | EXPORT_SYMBOL(fc_release_transport); | |
2105 | ||
aedf3497 JS |
2106 | /** |
2107 | * fc_queue_work - Queue work to the fc_host workqueue. | |
2108 | * @shost: Pointer to Scsi_Host bound to fc_host. | |
2109 | * @work: Work to queue for execution. | |
2110 | * | |
2111 | * Return value: | |
a0785edf JS |
2112 | * 1 - work queued for execution |
2113 | * 0 - work is already queued | |
2114 | * -EINVAL - work queue doesn't exist | |
aedf3497 JS |
2115 | **/ |
2116 | static int | |
2117 | fc_queue_work(struct Scsi_Host *shost, struct work_struct *work) | |
2118 | { | |
2119 | if (unlikely(!fc_host_work_q(shost))) { | |
2120 | printk(KERN_ERR | |
2121 | "ERROR: FC host '%s' attempted to queue work, " | |
2122 | "when no workqueue created.\n", shost->hostt->name); | |
2123 | dump_stack(); | |
2124 | ||
2125 | return -EINVAL; | |
2126 | } | |
2127 | ||
2128 | return queue_work(fc_host_work_q(shost), work); | |
2129 | } | |
2130 | ||
2131 | /** | |
2132 | * fc_flush_work - Flush a fc_host's workqueue. | |
2133 | * @shost: Pointer to Scsi_Host bound to fc_host. | |
2134 | **/ | |
2135 | static void | |
2136 | fc_flush_work(struct Scsi_Host *shost) | |
2137 | { | |
2138 | if (!fc_host_work_q(shost)) { | |
2139 | printk(KERN_ERR | |
2140 | "ERROR: FC host '%s' attempted to flush work, " | |
2141 | "when no workqueue created.\n", shost->hostt->name); | |
2142 | dump_stack(); | |
2143 | return; | |
2144 | } | |
2145 | ||
2146 | flush_workqueue(fc_host_work_q(shost)); | |
2147 | } | |
2148 | ||
2149 | /** | |
2150 | * fc_queue_devloss_work - Schedule work for the fc_host devloss workqueue. | |
2151 | * @shost: Pointer to Scsi_Host bound to fc_host. | |
2152 | * @work: Work to queue for execution. | |
2153 | * @delay: jiffies to delay the work queuing | |
2154 | * | |
2155 | * Return value: | |
0f29b966 | 2156 | * 1 on success / 0 already queued / < 0 for error |
aedf3497 JS |
2157 | **/ |
2158 | static int | |
c4028958 | 2159 | fc_queue_devloss_work(struct Scsi_Host *shost, struct delayed_work *work, |
aedf3497 JS |
2160 | unsigned long delay) |
2161 | { | |
2162 | if (unlikely(!fc_host_devloss_work_q(shost))) { | |
2163 | printk(KERN_ERR | |
2164 | "ERROR: FC host '%s' attempted to queue work, " | |
2165 | "when no workqueue created.\n", shost->hostt->name); | |
2166 | dump_stack(); | |
2167 | ||
2168 | return -EINVAL; | |
2169 | } | |
2170 | ||
2171 | return queue_delayed_work(fc_host_devloss_work_q(shost), work, delay); | |
2172 | } | |
2173 | ||
2174 | /** | |
2175 | * fc_flush_devloss - Flush a fc_host's devloss workqueue. | |
2176 | * @shost: Pointer to Scsi_Host bound to fc_host. | |
2177 | **/ | |
2178 | static void | |
2179 | fc_flush_devloss(struct Scsi_Host *shost) | |
2180 | { | |
2181 | if (!fc_host_devloss_work_q(shost)) { | |
2182 | printk(KERN_ERR | |
2183 | "ERROR: FC host '%s' attempted to flush work, " | |
2184 | "when no workqueue created.\n", shost->hostt->name); | |
2185 | dump_stack(); | |
2186 | return; | |
2187 | } | |
2188 | ||
2189 | flush_workqueue(fc_host_devloss_work_q(shost)); | |
2190 | } | |
2191 | ||
1da177e4 LT |
2192 | |
2193 | /** | |
2194 | * fc_remove_host - called to terminate any fc_transport-related elements | |
2195 | * for a scsi host. | |
2196 | * @rport: remote port to be unblocked. | |
2197 | * | |
2198 | * This routine is expected to be called immediately preceeding the | |
2199 | * a driver's call to scsi_remove_host(). | |
2200 | * | |
2201 | * WARNING: A driver utilizing the fc_transport, which fails to call | |
2202 | * this routine prior to scsi_remote_host(), will leave dangling | |
2203 | * objects in /sys/class/fc_remote_ports. Access to any of these | |
2204 | * objects can result in a system crash !!! | |
2205 | * | |
2206 | * Notes: | |
2207 | * This routine assumes no locks are held on entry. | |
2208 | **/ | |
2209 | void | |
2210 | fc_remove_host(struct Scsi_Host *shost) | |
2211 | { | |
a53eb5e0 JS |
2212 | struct fc_vport *vport = NULL, *next_vport = NULL; |
2213 | struct fc_rport *rport = NULL, *next_rport = NULL; | |
aedf3497 JS |
2214 | struct workqueue_struct *work_q; |
2215 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); | |
a53eb5e0 | 2216 | unsigned long flags; |
a53eb5e0 JS |
2217 | |
2218 | spin_lock_irqsave(shost->host_lock, flags); | |
2219 | ||
2220 | /* Remove any vports */ | |
9ef3e4a4 JS |
2221 | list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers) |
2222 | fc_queue_work(shost, &vport->vport_delete_work); | |
1da177e4 LT |
2223 | |
2224 | /* Remove any remote ports */ | |
2225 | list_for_each_entry_safe(rport, next_rport, | |
aedf3497 JS |
2226 | &fc_host->rports, peers) { |
2227 | list_del(&rport->peers); | |
2228 | rport->port_state = FC_PORTSTATE_DELETED; | |
2229 | fc_queue_work(shost, &rport->rport_delete_work); | |
2230 | } | |
2231 | ||
1da177e4 | 2232 | list_for_each_entry_safe(rport, next_rport, |
aedf3497 JS |
2233 | &fc_host->rport_bindings, peers) { |
2234 | list_del(&rport->peers); | |
2235 | rport->port_state = FC_PORTSTATE_DELETED; | |
2236 | fc_queue_work(shost, &rport->rport_delete_work); | |
2237 | } | |
2238 | ||
a53eb5e0 JS |
2239 | spin_unlock_irqrestore(shost->host_lock, flags); |
2240 | ||
aedf3497 JS |
2241 | /* flush all scan work items */ |
2242 | scsi_flush_work(shost); | |
2243 | ||
2244 | /* flush all stgt delete, and rport delete work items, then kill it */ | |
2245 | if (fc_host->work_q) { | |
2246 | work_q = fc_host->work_q; | |
2247 | fc_host->work_q = NULL; | |
2248 | destroy_workqueue(work_q); | |
2249 | } | |
2250 | ||
2251 | /* flush all devloss work items, then kill it */ | |
2252 | if (fc_host->devloss_work_q) { | |
2253 | work_q = fc_host->devloss_work_q; | |
2254 | fc_host->devloss_work_q = NULL; | |
2255 | destroy_workqueue(work_q); | |
2256 | } | |
1da177e4 LT |
2257 | } |
2258 | EXPORT_SYMBOL(fc_remove_host); | |
2259 | ||
aedf3497 JS |
2260 | |
2261 | /** | |
2262 | * fc_starget_delete - called to delete the scsi decendents of an rport | |
2263 | * (target and all sdevs) | |
2264 | * | |
c4028958 | 2265 | * @work: remote port to be operated on. |
aedf3497 | 2266 | **/ |
19a7b4ae | 2267 | static void |
c4028958 | 2268 | fc_starget_delete(struct work_struct *work) |
19a7b4ae | 2269 | { |
c4028958 DH |
2270 | struct fc_rport *rport = |
2271 | container_of(work, struct fc_rport, stgt_delete_work); | |
19a7b4ae | 2272 | struct Scsi_Host *shost = rport_to_shost(rport); |
0f29b966 JS |
2273 | struct fc_internal *i = to_fc_internal(shost->transportt); |
2274 | ||
92740b24 JS |
2275 | /* Involve the LLDD if possible to terminate all io on the rport. */ |
2276 | if (i->f->terminate_rport_io) | |
0f29b966 | 2277 | i->f->terminate_rport_io(rport); |
19a7b4ae | 2278 | |
19a7b4ae JSEC |
2279 | scsi_remove_target(&rport->dev); |
2280 | } | |
2281 | ||
aedf3497 JS |
2282 | |
2283 | /** | |
2284 | * fc_rport_final_delete - finish rport termination and delete it. | |
2285 | * | |
c4028958 | 2286 | * @work: remote port to be deleted. |
aedf3497 JS |
2287 | **/ |
2288 | static void | |
c4028958 | 2289 | fc_rport_final_delete(struct work_struct *work) |
aedf3497 | 2290 | { |
c4028958 DH |
2291 | struct fc_rport *rport = |
2292 | container_of(work, struct fc_rport, rport_delete_work); | |
aedf3497 JS |
2293 | struct device *dev = &rport->dev; |
2294 | struct Scsi_Host *shost = rport_to_shost(rport); | |
0f29b966 | 2295 | struct fc_internal *i = to_fc_internal(shost->transportt); |
92740b24 | 2296 | unsigned long flags; |
aedf3497 JS |
2297 | |
2298 | /* | |
9ef3e4a4 | 2299 | * if a scan is pending, flush the SCSI Host work_q so that |
aedf3497 JS |
2300 | * that we can reclaim the rport scan work element. |
2301 | */ | |
2302 | if (rport->flags & FC_RPORT_SCAN_PENDING) | |
2303 | scsi_flush_work(shost); | |
2304 | ||
92740b24 JS |
2305 | /* involve the LLDD to terminate all pending i/o */ |
2306 | if (i->f->terminate_rport_io) | |
2307 | i->f->terminate_rport_io(rport); | |
2308 | ||
2309 | /* | |
2310 | * Cancel any outstanding timers. These should really exist | |
2311 | * only when rmmod'ing the LLDD and we're asking for | |
2312 | * immediate termination of the rports | |
2313 | */ | |
2314 | spin_lock_irqsave(shost->host_lock, flags); | |
2315 | if (rport->flags & FC_RPORT_DEVLOSS_PENDING) { | |
2316 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2317 | if (!cancel_delayed_work(&rport->fail_io_work)) | |
2318 | fc_flush_devloss(shost); | |
2319 | if (!cancel_delayed_work(&rport->dev_loss_work)) | |
2320 | fc_flush_devloss(shost); | |
2321 | spin_lock_irqsave(shost->host_lock, flags); | |
2322 | rport->flags &= ~FC_RPORT_DEVLOSS_PENDING; | |
2323 | } | |
2324 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2325 | ||
0f29b966 JS |
2326 | /* Delete SCSI target and sdevs */ |
2327 | if (rport->scsi_target_id != -1) | |
c4028958 | 2328 | fc_starget_delete(&rport->stgt_delete_work); |
92740b24 JS |
2329 | |
2330 | /* | |
2331 | * Notify the driver that the rport is now dead. The LLDD will | |
2332 | * also guarantee that any communication to the rport is terminated | |
2333 | */ | |
2334 | if (i->f->dev_loss_tmo_callbk) | |
0f29b966 | 2335 | i->f->dev_loss_tmo_callbk(rport); |
0f29b966 | 2336 | |
aedf3497 JS |
2337 | transport_remove_device(dev); |
2338 | device_del(dev); | |
2339 | transport_destroy_device(dev); | |
3bdad7bd JS |
2340 | put_device(&shost->shost_gendev); /* for fc_host->rport list */ |
2341 | put_device(dev); /* for self-reference */ | |
aedf3497 JS |
2342 | } |
2343 | ||
2344 | ||
1da177e4 LT |
2345 | /** |
2346 | * fc_rport_create - allocates and creates a remote FC port. | |
2347 | * @shost: scsi host the remote port is connected to. | |
2348 | * @channel: Channel on shost port connected to. | |
2349 | * @ids: The world wide names, fc address, and FC4 port | |
2350 | * roles for the remote port. | |
2351 | * | |
2352 | * Allocates and creates the remoter port structure, including the | |
2353 | * class and sysfs creation. | |
2354 | * | |
2355 | * Notes: | |
2356 | * This routine assumes no locks are held on entry. | |
2357 | **/ | |
2358 | struct fc_rport * | |
2359 | fc_rport_create(struct Scsi_Host *shost, int channel, | |
2360 | struct fc_rport_identifiers *ids) | |
2361 | { | |
aedf3497 | 2362 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
1da177e4 LT |
2363 | struct fc_internal *fci = to_fc_internal(shost->transportt); |
2364 | struct fc_rport *rport; | |
2365 | struct device *dev; | |
2366 | unsigned long flags; | |
2367 | int error; | |
2368 | size_t size; | |
2369 | ||
2370 | size = (sizeof(struct fc_rport) + fci->f->dd_fcrport_size); | |
24669f75 | 2371 | rport = kzalloc(size, GFP_KERNEL); |
1da177e4 LT |
2372 | if (unlikely(!rport)) { |
2373 | printk(KERN_ERR "%s: allocation failure\n", __FUNCTION__); | |
2374 | return NULL; | |
2375 | } | |
1da177e4 LT |
2376 | |
2377 | rport->maxframe_size = -1; | |
2378 | rport->supported_classes = FC_COS_UNSPECIFIED; | |
2379 | rport->dev_loss_tmo = fc_dev_loss_tmo; | |
2380 | memcpy(&rport->node_name, &ids->node_name, sizeof(rport->node_name)); | |
2381 | memcpy(&rport->port_name, &ids->port_name, sizeof(rport->port_name)); | |
2382 | rport->port_id = ids->port_id; | |
2383 | rport->roles = ids->roles; | |
2384 | rport->port_state = FC_PORTSTATE_ONLINE; | |
2385 | if (fci->f->dd_fcrport_size) | |
2386 | rport->dd_data = &rport[1]; | |
2387 | rport->channel = channel; | |
0f29b966 | 2388 | rport->fast_io_fail_tmo = -1; |
1da177e4 | 2389 | |
c4028958 DH |
2390 | INIT_DELAYED_WORK(&rport->dev_loss_work, fc_timeout_deleted_rport); |
2391 | INIT_DELAYED_WORK(&rport->fail_io_work, fc_timeout_fail_rport_io); | |
2392 | INIT_WORK(&rport->scan_work, fc_scsi_scan_rport); | |
2393 | INIT_WORK(&rport->stgt_delete_work, fc_starget_delete); | |
2394 | INIT_WORK(&rport->rport_delete_work, fc_rport_final_delete); | |
1da177e4 LT |
2395 | |
2396 | spin_lock_irqsave(shost->host_lock, flags); | |
2397 | ||
2398 | rport->number = fc_host->next_rport_number++; | |
a53eb5e0 | 2399 | if (rport->roles & FC_PORT_ROLE_FCP_TARGET) |
1da177e4 LT |
2400 | rport->scsi_target_id = fc_host->next_target_id++; |
2401 | else | |
2402 | rport->scsi_target_id = -1; | |
aedf3497 | 2403 | list_add_tail(&rport->peers, &fc_host->rports); |
3bdad7bd | 2404 | get_device(&shost->shost_gendev); /* for fc_host->rport list */ |
1da177e4 LT |
2405 | |
2406 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2407 | ||
2408 | dev = &rport->dev; | |
3bdad7bd JS |
2409 | device_initialize(dev); /* takes self reference */ |
2410 | dev->parent = get_device(&shost->shost_gendev); /* parent reference */ | |
1da177e4 LT |
2411 | dev->release = fc_rport_dev_release; |
2412 | sprintf(dev->bus_id, "rport-%d:%d-%d", | |
2413 | shost->host_no, channel, rport->number); | |
2414 | transport_setup_device(dev); | |
2415 | ||
2416 | error = device_add(dev); | |
2417 | if (error) { | |
2418 | printk(KERN_ERR "FC Remote Port device_add failed\n"); | |
2419 | goto delete_rport; | |
2420 | } | |
2421 | transport_add_device(dev); | |
2422 | transport_configure_device(dev); | |
2423 | ||
a53eb5e0 | 2424 | if (rport->roles & FC_PORT_ROLE_FCP_TARGET) { |
1da177e4 | 2425 | /* initiate a scan of the target */ |
aedf3497 | 2426 | rport->flags |= FC_RPORT_SCAN_PENDING; |
1da177e4 | 2427 | scsi_queue_work(shost, &rport->scan_work); |
aedf3497 | 2428 | } |
1da177e4 LT |
2429 | |
2430 | return rport; | |
2431 | ||
2432 | delete_rport: | |
2433 | transport_destroy_device(dev); | |
1da177e4 LT |
2434 | spin_lock_irqsave(shost->host_lock, flags); |
2435 | list_del(&rport->peers); | |
3bdad7bd | 2436 | put_device(&shost->shost_gendev); /* for fc_host->rport list */ |
1da177e4 LT |
2437 | spin_unlock_irqrestore(shost->host_lock, flags); |
2438 | put_device(dev->parent); | |
2439 | kfree(rport); | |
2440 | return NULL; | |
2441 | } | |
2442 | ||
2443 | /** | |
2444 | * fc_remote_port_add - notifies the fc transport of the existence | |
2445 | * of a remote FC port. | |
2446 | * @shost: scsi host the remote port is connected to. | |
2447 | * @channel: Channel on shost port connected to. | |
2448 | * @ids: The world wide names, fc address, and FC4 port | |
2449 | * roles for the remote port. | |
2450 | * | |
2451 | * The LLDD calls this routine to notify the transport of the existence | |
2452 | * of a remote port. The LLDD provides the unique identifiers (wwpn,wwn) | |
2453 | * of the port, it's FC address (port_id), and the FC4 roles that are | |
2454 | * active for the port. | |
2455 | * | |
2456 | * For ports that are FCP targets (aka scsi targets), the FC transport | |
2457 | * maintains consistent target id bindings on behalf of the LLDD. | |
2458 | * A consistent target id binding is an assignment of a target id to | |
2459 | * a remote port identifier, which persists while the scsi host is | |
2460 | * attached. The remote port can disappear, then later reappear, and | |
2461 | * it's target id assignment remains the same. This allows for shifts | |
2462 | * in FC addressing (if binding by wwpn or wwnn) with no apparent | |
2463 | * changes to the scsi subsystem which is based on scsi host number and | |
2464 | * target id values. Bindings are only valid during the attachment of | |
2465 | * the scsi host. If the host detaches, then later re-attaches, target | |
2466 | * id bindings may change. | |
2467 | * | |
2468 | * This routine is responsible for returning a remote port structure. | |
2469 | * The routine will search the list of remote ports it maintains | |
2470 | * internally on behalf of consistent target id mappings. If found, the | |
2471 | * remote port structure will be reused. Otherwise, a new remote port | |
2472 | * structure will be allocated. | |
2473 | * | |
2474 | * Whenever a remote port is allocated, a new fc_remote_port class | |
2475 | * device is created. | |
2476 | * | |
2477 | * Should not be called from interrupt context. | |
2478 | * | |
2479 | * Notes: | |
2480 | * This routine assumes no locks are held on entry. | |
2481 | **/ | |
2482 | struct fc_rport * | |
2483 | fc_remote_port_add(struct Scsi_Host *shost, int channel, | |
2484 | struct fc_rport_identifiers *ids) | |
2485 | { | |
19a7b4ae | 2486 | struct fc_internal *fci = to_fc_internal(shost->transportt); |
aedf3497 | 2487 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
1da177e4 LT |
2488 | struct fc_rport *rport; |
2489 | unsigned long flags; | |
2490 | int match = 0; | |
2491 | ||
aedf3497 JS |
2492 | /* ensure any stgt delete functions are done */ |
2493 | fc_flush_work(shost); | |
2494 | ||
19a7b4ae JSEC |
2495 | /* |
2496 | * Search the list of "active" rports, for an rport that has been | |
2497 | * deleted, but we've held off the real delete while the target | |
2498 | * is in a "blocked" state. | |
2499 | */ | |
2500 | spin_lock_irqsave(shost->host_lock, flags); | |
2501 | ||
aedf3497 | 2502 | list_for_each_entry(rport, &fc_host->rports, peers) { |
19a7b4ae JSEC |
2503 | |
2504 | if ((rport->port_state == FC_PORTSTATE_BLOCKED) && | |
2505 | (rport->channel == channel)) { | |
2506 | ||
aedf3497 | 2507 | switch (fc_host->tgtid_bind_type) { |
19a7b4ae JSEC |
2508 | case FC_TGTID_BIND_BY_WWPN: |
2509 | case FC_TGTID_BIND_NONE: | |
2510 | if (rport->port_name == ids->port_name) | |
2511 | match = 1; | |
2512 | break; | |
2513 | case FC_TGTID_BIND_BY_WWNN: | |
2514 | if (rport->node_name == ids->node_name) | |
2515 | match = 1; | |
2516 | break; | |
2517 | case FC_TGTID_BIND_BY_ID: | |
2518 | if (rport->port_id == ids->port_id) | |
2519 | match = 1; | |
2520 | break; | |
2521 | } | |
2522 | ||
2523 | if (match) { | |
19a7b4ae JSEC |
2524 | |
2525 | memcpy(&rport->node_name, &ids->node_name, | |
2526 | sizeof(rport->node_name)); | |
2527 | memcpy(&rport->port_name, &ids->port_name, | |
2528 | sizeof(rport->port_name)); | |
2529 | rport->port_id = ids->port_id; | |
2530 | ||
2531 | rport->port_state = FC_PORTSTATE_ONLINE; | |
2532 | rport->roles = ids->roles; | |
2533 | ||
2534 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2535 | ||
2536 | if (fci->f->dd_fcrport_size) | |
2537 | memset(rport->dd_data, 0, | |
2538 | fci->f->dd_fcrport_size); | |
2539 | ||
2540 | /* | |
92740b24 JS |
2541 | * If we were not a target, cancel the |
2542 | * io terminate and rport timers, and | |
2543 | * we're done. | |
2544 | * | |
2545 | * If we were a target, but our new role | |
2546 | * doesn't indicate a target, leave the | |
2547 | * timers running expecting the role to | |
2548 | * change as the target fully logs in. If | |
2549 | * it doesn't, the target will be torn down. | |
2550 | * | |
2551 | * If we were a target, and our role shows | |
2552 | * we're still a target, cancel the timers | |
2553 | * and kick off a scan. | |
19a7b4ae | 2554 | */ |
19a7b4ae | 2555 | |
92740b24 JS |
2556 | /* was a target, not in roles */ |
2557 | if ((rport->scsi_target_id != -1) && | |
a53eb5e0 | 2558 | (!(ids->roles & FC_PORT_ROLE_FCP_TARGET))) |
92740b24 | 2559 | return rport; |
19a7b4ae JSEC |
2560 | |
2561 | /* | |
92740b24 JS |
2562 | * Stop the fail io and dev_loss timers. |
2563 | * If they flush, the port_state will | |
2564 | * be checked and will NOOP the function. | |
19a7b4ae | 2565 | */ |
0f29b966 JS |
2566 | if (!cancel_delayed_work(&rport->fail_io_work)) |
2567 | fc_flush_devloss(shost); | |
92740b24 | 2568 | if (!cancel_delayed_work(&rport->dev_loss_work)) |
aedf3497 JS |
2569 | fc_flush_devloss(shost); |
2570 | ||
2571 | spin_lock_irqsave(shost->host_lock, flags); | |
2572 | ||
2573 | rport->flags &= ~FC_RPORT_DEVLOSS_PENDING; | |
19a7b4ae | 2574 | |
92740b24 JS |
2575 | /* if target, initiate a scan */ |
2576 | if (rport->scsi_target_id != -1) { | |
2577 | rport->flags |= FC_RPORT_SCAN_PENDING; | |
2578 | scsi_queue_work(shost, | |
2579 | &rport->scan_work); | |
2580 | spin_unlock_irqrestore(shost->host_lock, | |
2581 | flags); | |
2582 | scsi_target_unblock(&rport->dev); | |
2583 | } else | |
2584 | spin_unlock_irqrestore(shost->host_lock, | |
2585 | flags); | |
a0785edf | 2586 | |
19a7b4ae JSEC |
2587 | return rport; |
2588 | } | |
2589 | } | |
2590 | } | |
2591 | ||
92740b24 JS |
2592 | /* |
2593 | * Search the bindings array | |
2594 | * Note: if never a FCP target, you won't be on this list | |
2595 | */ | |
aedf3497 | 2596 | if (fc_host->tgtid_bind_type != FC_TGTID_BIND_NONE) { |
1da177e4 LT |
2597 | |
2598 | /* search for a matching consistent binding */ | |
2599 | ||
aedf3497 | 2600 | list_for_each_entry(rport, &fc_host->rport_bindings, |
1da177e4 LT |
2601 | peers) { |
2602 | if (rport->channel != channel) | |
2603 | continue; | |
2604 | ||
aedf3497 | 2605 | switch (fc_host->tgtid_bind_type) { |
1da177e4 LT |
2606 | case FC_TGTID_BIND_BY_WWPN: |
2607 | if (rport->port_name == ids->port_name) | |
2608 | match = 1; | |
2609 | break; | |
2610 | case FC_TGTID_BIND_BY_WWNN: | |
2611 | if (rport->node_name == ids->node_name) | |
2612 | match = 1; | |
2613 | break; | |
2614 | case FC_TGTID_BIND_BY_ID: | |
2615 | if (rport->port_id == ids->port_id) | |
2616 | match = 1; | |
2617 | break; | |
2618 | case FC_TGTID_BIND_NONE: /* to keep compiler happy */ | |
2619 | break; | |
2620 | } | |
2621 | ||
2622 | if (match) { | |
aedf3497 | 2623 | list_move_tail(&rport->peers, &fc_host->rports); |
1da177e4 LT |
2624 | break; |
2625 | } | |
2626 | } | |
2627 | ||
1da177e4 LT |
2628 | if (match) { |
2629 | memcpy(&rport->node_name, &ids->node_name, | |
2630 | sizeof(rport->node_name)); | |
2631 | memcpy(&rport->port_name, &ids->port_name, | |
2632 | sizeof(rport->port_name)); | |
2633 | rport->port_id = ids->port_id; | |
2634 | rport->roles = ids->roles; | |
2635 | rport->port_state = FC_PORTSTATE_ONLINE; | |
2636 | ||
19a7b4ae JSEC |
2637 | if (fci->f->dd_fcrport_size) |
2638 | memset(rport->dd_data, 0, | |
2639 | fci->f->dd_fcrport_size); | |
2640 | ||
a53eb5e0 | 2641 | if (rport->roles & FC_PORT_ROLE_FCP_TARGET) { |
1da177e4 | 2642 | /* initiate a scan of the target */ |
aedf3497 | 2643 | rport->flags |= FC_RPORT_SCAN_PENDING; |
1da177e4 | 2644 | scsi_queue_work(shost, &rport->scan_work); |
a0785edf JS |
2645 | spin_unlock_irqrestore(shost->host_lock, flags); |
2646 | scsi_target_unblock(&rport->dev); | |
2647 | } else | |
2648 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1da177e4 LT |
2649 | |
2650 | return rport; | |
2651 | } | |
2652 | } | |
2653 | ||
19a7b4ae JSEC |
2654 | spin_unlock_irqrestore(shost->host_lock, flags); |
2655 | ||
1da177e4 LT |
2656 | /* No consistent binding found - create new remote port entry */ |
2657 | rport = fc_rport_create(shost, channel, ids); | |
2658 | ||
2659 | return rport; | |
2660 | } | |
2661 | EXPORT_SYMBOL(fc_remote_port_add); | |
2662 | ||
1da177e4 LT |
2663 | |
2664 | /** | |
2665 | * fc_remote_port_delete - notifies the fc transport that a remote | |
2666 | * port is no longer in existence. | |
2667 | * @rport: The remote port that no longer exists | |
2668 | * | |
2669 | * The LLDD calls this routine to notify the transport that a remote | |
2670 | * port is no longer part of the topology. Note: Although a port | |
2671 | * may no longer be part of the topology, it may persist in the remote | |
19a7b4ae JSEC |
2672 | * ports displayed by the fc_host. We do this under 2 conditions: |
2673 | * - If the port was a scsi target, we delay its deletion by "blocking" it. | |
2674 | * This allows the port to temporarily disappear, then reappear without | |
2675 | * disrupting the SCSI device tree attached to it. During the "blocked" | |
2676 | * period the port will still exist. | |
2677 | * - If the port was a scsi target and disappears for longer than we | |
2678 | * expect, we'll delete the port and the tear down the SCSI device tree | |
2679 | * attached to it. However, we want to semi-persist the target id assigned | |
2680 | * to that port if it eventually does exist. The port structure will | |
2681 | * remain (although with minimal information) so that the target id | |
2682 | * bindings remails. | |
1da177e4 LT |
2683 | * |
2684 | * If the remote port is not an FCP Target, it will be fully torn down | |
2685 | * and deallocated, including the fc_remote_port class device. | |
2686 | * | |
19a7b4ae JSEC |
2687 | * If the remote port is an FCP Target, the port will be placed in a |
2688 | * temporary blocked state. From the LLDD's perspective, the rport no | |
2689 | * longer exists. From the SCSI midlayer's perspective, the SCSI target | |
2690 | * exists, but all sdevs on it are blocked from further I/O. The following | |
2691 | * is then expected: | |
2692 | * If the remote port does not return (signaled by a LLDD call to | |
2693 | * fc_remote_port_add()) within the dev_loss_tmo timeout, then the | |
2694 | * scsi target is removed - killing all outstanding i/o and removing the | |
2695 | * scsi devices attached ot it. The port structure will be marked Not | |
2696 | * Present and be partially cleared, leaving only enough information to | |
2697 | * recognize the remote port relative to the scsi target id binding if | |
2698 | * it later appears. The port will remain as long as there is a valid | |
2699 | * binding (e.g. until the user changes the binding type or unloads the | |
2700 | * scsi host with the binding). | |
1da177e4 | 2701 | * |
19a7b4ae JSEC |
2702 | * If the remote port returns within the dev_loss_tmo value (and matches |
2703 | * according to the target id binding type), the port structure will be | |
2704 | * reused. If it is no longer a SCSI target, the target will be torn | |
2705 | * down. If it continues to be a SCSI target, then the target will be | |
2706 | * unblocked (allowing i/o to be resumed), and a scan will be activated | |
2707 | * to ensure that all luns are detected. | |
2708 | * | |
2709 | * Called from normal process context only - cannot be called from interrupt. | |
1da177e4 LT |
2710 | * |
2711 | * Notes: | |
2712 | * This routine assumes no locks are held on entry. | |
2713 | **/ | |
2714 | void | |
2715 | fc_remote_port_delete(struct fc_rport *rport) | |
2716 | { | |
aedf3497 | 2717 | struct Scsi_Host *shost = rport_to_shost(rport); |
0f29b966 | 2718 | struct fc_internal *i = to_fc_internal(shost->transportt); |
19a7b4ae | 2719 | int timeout = rport->dev_loss_tmo; |
aedf3497 JS |
2720 | unsigned long flags; |
2721 | ||
2722 | /* | |
2723 | * No need to flush the fc_host work_q's, as all adds are synchronous. | |
2724 | * | |
2725 | * We do need to reclaim the rport scan work element, so eventually | |
2726 | * (in fc_rport_final_delete()) we'll flush the scsi host work_q if | |
2727 | * there's still a scan pending. | |
2728 | */ | |
2729 | ||
2730 | spin_lock_irqsave(shost->host_lock, flags); | |
1da177e4 | 2731 | |
92740b24 | 2732 | if (rport->port_state != FC_PORTSTATE_ONLINE) { |
aedf3497 | 2733 | spin_unlock_irqrestore(shost->host_lock, flags); |
1da177e4 LT |
2734 | return; |
2735 | } | |
2736 | ||
92740b24 JS |
2737 | /* |
2738 | * In the past, we if this was not an FCP-Target, we would | |
2739 | * unconditionally just jump to deleting the rport. | |
2740 | * However, rports can be used as node containers by the LLDD, | |
2741 | * and its not appropriate to just terminate the rport at the | |
2742 | * first sign of a loss in connectivity. The LLDD may want to | |
2743 | * send ELS traffic to re-validate the login. If the rport is | |
2744 | * immediately deleted, it makes it inappropriate for a node | |
2745 | * container. | |
2746 | * So... we now unconditionally wait dev_loss_tmo before | |
2747 | * destroying an rport. | |
2748 | */ | |
2749 | ||
aedf3497 JS |
2750 | rport->port_state = FC_PORTSTATE_BLOCKED; |
2751 | ||
2752 | rport->flags |= FC_RPORT_DEVLOSS_PENDING; | |
2753 | ||
2754 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2755 | ||
19a7b4ae | 2756 | scsi_target_block(&rport->dev); |
1da177e4 | 2757 | |
0f29b966 JS |
2758 | /* see if we need to kill io faster than waiting for device loss */ |
2759 | if ((rport->fast_io_fail_tmo != -1) && | |
2760 | (rport->fast_io_fail_tmo < timeout) && (i->f->terminate_rport_io)) | |
2761 | fc_queue_devloss_work(shost, &rport->fail_io_work, | |
2762 | rport->fast_io_fail_tmo * HZ); | |
2763 | ||
19a7b4ae | 2764 | /* cap the length the devices can be blocked until they are deleted */ |
aedf3497 | 2765 | fc_queue_devloss_work(shost, &rport->dev_loss_work, timeout * HZ); |
1da177e4 LT |
2766 | } |
2767 | EXPORT_SYMBOL(fc_remote_port_delete); | |
2768 | ||
2769 | /** | |
2770 | * fc_remote_port_rolechg - notifies the fc transport that the roles | |
2771 | * on a remote may have changed. | |
2772 | * @rport: The remote port that changed. | |
2773 | * | |
2774 | * The LLDD calls this routine to notify the transport that the roles | |
2775 | * on a remote port may have changed. The largest effect of this is | |
2776 | * if a port now becomes a FCP Target, it must be allocated a | |
2777 | * scsi target id. If the port is no longer a FCP target, any | |
2778 | * scsi target id value assigned to it will persist in case the | |
2779 | * role changes back to include FCP Target. No changes in the scsi | |
2780 | * midlayer will be invoked if the role changes (in the expectation | |
2781 | * that the role will be resumed. If it doesn't normal error processing | |
2782 | * will take place). | |
2783 | * | |
2784 | * Should not be called from interrupt context. | |
2785 | * | |
2786 | * Notes: | |
2787 | * This routine assumes no locks are held on entry. | |
2788 | **/ | |
2789 | void | |
2790 | fc_remote_port_rolechg(struct fc_rport *rport, u32 roles) | |
2791 | { | |
2792 | struct Scsi_Host *shost = rport_to_shost(rport); | |
aedf3497 | 2793 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
1da177e4 LT |
2794 | unsigned long flags; |
2795 | int create = 0; | |
2796 | ||
1da177e4 | 2797 | spin_lock_irqsave(shost->host_lock, flags); |
a53eb5e0 | 2798 | if (roles & FC_PORT_ROLE_FCP_TARGET) { |
19a7b4ae JSEC |
2799 | if (rport->scsi_target_id == -1) { |
2800 | rport->scsi_target_id = fc_host->next_target_id++; | |
2801 | create = 1; | |
a53eb5e0 | 2802 | } else if (!(rport->roles & FC_PORT_ROLE_FCP_TARGET)) |
19a7b4ae | 2803 | create = 1; |
1da177e4 | 2804 | } |
1da177e4 | 2805 | |
19a7b4ae JSEC |
2806 | rport->roles = roles; |
2807 | ||
aedf3497 JS |
2808 | spin_unlock_irqrestore(shost->host_lock, flags); |
2809 | ||
19a7b4ae JSEC |
2810 | if (create) { |
2811 | /* | |
2812 | * There may have been a delete timer running on the | |
2813 | * port. Ensure that it is cancelled as we now know | |
2814 | * the port is an FCP Target. | |
2815 | * Note: we know the rport is exists and in an online | |
2816 | * state as the LLDD would not have had an rport | |
2817 | * reference to pass us. | |
2818 | * | |
2819 | * Take no action on the del_timer failure as the state | |
2820 | * machine state change will validate the | |
2821 | * transaction. | |
2822 | */ | |
0f29b966 JS |
2823 | if (!cancel_delayed_work(&rport->fail_io_work)) |
2824 | fc_flush_devloss(shost); | |
19a7b4ae | 2825 | if (!cancel_delayed_work(&rport->dev_loss_work)) |
aedf3497 JS |
2826 | fc_flush_devloss(shost); |
2827 | ||
2828 | spin_lock_irqsave(shost->host_lock, flags); | |
2829 | rport->flags &= ~FC_RPORT_DEVLOSS_PENDING; | |
2830 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2831 | ||
2832 | /* ensure any stgt delete functions are done */ | |
2833 | fc_flush_work(shost); | |
19a7b4ae | 2834 | |
1da177e4 | 2835 | /* initiate a scan of the target */ |
aedf3497 JS |
2836 | spin_lock_irqsave(shost->host_lock, flags); |
2837 | rport->flags |= FC_RPORT_SCAN_PENDING; | |
1da177e4 | 2838 | scsi_queue_work(shost, &rport->scan_work); |
aedf3497 | 2839 | spin_unlock_irqrestore(shost->host_lock, flags); |
a0785edf | 2840 | scsi_target_unblock(&rport->dev); |
19a7b4ae | 2841 | } |
1da177e4 LT |
2842 | } |
2843 | EXPORT_SYMBOL(fc_remote_port_rolechg); | |
2844 | ||
2845 | /** | |
92740b24 JS |
2846 | * fc_timeout_deleted_rport - Timeout handler for a deleted remote port, |
2847 | * which we blocked, and has now failed to return | |
2848 | * in the allotted time. | |
9ef3e4a4 | 2849 | * |
92740b24 | 2850 | * @work: rport target that failed to reappear in the allotted time. |
1da177e4 LT |
2851 | **/ |
2852 | static void | |
c4028958 | 2853 | fc_timeout_deleted_rport(struct work_struct *work) |
1da177e4 | 2854 | { |
c4028958 DH |
2855 | struct fc_rport *rport = |
2856 | container_of(work, struct fc_rport, dev_loss_work.work); | |
19a7b4ae | 2857 | struct Scsi_Host *shost = rport_to_shost(rport); |
aedf3497 | 2858 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
19a7b4ae | 2859 | unsigned long flags; |
1da177e4 | 2860 | |
19a7b4ae | 2861 | spin_lock_irqsave(shost->host_lock, flags); |
1da177e4 | 2862 | |
aedf3497 JS |
2863 | rport->flags &= ~FC_RPORT_DEVLOSS_PENDING; |
2864 | ||
1da177e4 | 2865 | /* |
92740b24 JS |
2866 | * If the port is ONLINE, then it came back. If it was a SCSI |
2867 | * target, validate it still is. If not, tear down the | |
2868 | * scsi_target on it. | |
1da177e4 | 2869 | */ |
aedf3497 | 2870 | if ((rport->port_state == FC_PORTSTATE_ONLINE) && |
92740b24 | 2871 | (rport->scsi_target_id != -1) && |
a53eb5e0 | 2872 | !(rport->roles & FC_PORT_ROLE_FCP_TARGET)) { |
19a7b4ae | 2873 | dev_printk(KERN_ERR, &rport->dev, |
aedf3497 JS |
2874 | "blocked FC remote port time out: no longer" |
2875 | " a FCP target, removing starget\n"); | |
aedf3497 | 2876 | spin_unlock_irqrestore(shost->host_lock, flags); |
a0785edf JS |
2877 | scsi_target_unblock(&rport->dev); |
2878 | fc_queue_work(shost, &rport->stgt_delete_work); | |
19a7b4ae JSEC |
2879 | return; |
2880 | } | |
1da177e4 | 2881 | |
92740b24 | 2882 | /* NOOP state - we're flushing workq's */ |
19a7b4ae JSEC |
2883 | if (rport->port_state != FC_PORTSTATE_BLOCKED) { |
2884 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2885 | dev_printk(KERN_ERR, &rport->dev, | |
92740b24 JS |
2886 | "blocked FC remote port time out: leaving" |
2887 | " rport%s alone\n", | |
2888 | (rport->scsi_target_id != -1) ? " and starget" : ""); | |
19a7b4ae JSEC |
2889 | return; |
2890 | } | |
1da177e4 | 2891 | |
92740b24 JS |
2892 | if ((fc_host->tgtid_bind_type == FC_TGTID_BIND_NONE) || |
2893 | (rport->scsi_target_id == -1)) { | |
aedf3497 JS |
2894 | list_del(&rport->peers); |
2895 | rport->port_state = FC_PORTSTATE_DELETED; | |
19a7b4ae | 2896 | dev_printk(KERN_ERR, &rport->dev, |
92740b24 JS |
2897 | "blocked FC remote port time out: removing" |
2898 | " rport%s\n", | |
2899 | (rport->scsi_target_id != -1) ? " and starget" : ""); | |
aedf3497 JS |
2900 | fc_queue_work(shost, &rport->rport_delete_work); |
2901 | spin_unlock_irqrestore(shost->host_lock, flags); | |
19a7b4ae JSEC |
2902 | return; |
2903 | } | |
1da177e4 | 2904 | |
19a7b4ae JSEC |
2905 | dev_printk(KERN_ERR, &rport->dev, |
2906 | "blocked FC remote port time out: removing target and " | |
2907 | "saving binding\n"); | |
2908 | ||
aedf3497 | 2909 | list_move_tail(&rport->peers, &fc_host->rport_bindings); |
1da177e4 LT |
2910 | |
2911 | /* | |
19a7b4ae JSEC |
2912 | * Note: We do not remove or clear the hostdata area. This allows |
2913 | * host-specific target data to persist along with the | |
2914 | * scsi_target_id. It's up to the host to manage it's hostdata area. | |
1da177e4 | 2915 | */ |
1da177e4 | 2916 | |
19a7b4ae JSEC |
2917 | /* |
2918 | * Reinitialize port attributes that may change if the port comes back. | |
2919 | */ | |
2920 | rport->maxframe_size = -1; | |
2921 | rport->supported_classes = FC_COS_UNSPECIFIED; | |
a53eb5e0 | 2922 | rport->roles = FC_PORT_ROLE_UNKNOWN; |
aedf3497 | 2923 | rport->port_state = FC_PORTSTATE_NOTPRESENT; |
1da177e4 | 2924 | |
19a7b4ae | 2925 | /* remove the identifiers that aren't used in the consisting binding */ |
aedf3497 | 2926 | switch (fc_host->tgtid_bind_type) { |
19a7b4ae JSEC |
2927 | case FC_TGTID_BIND_BY_WWPN: |
2928 | rport->node_name = -1; | |
2929 | rport->port_id = -1; | |
2930 | break; | |
2931 | case FC_TGTID_BIND_BY_WWNN: | |
2932 | rport->port_name = -1; | |
2933 | rport->port_id = -1; | |
2934 | break; | |
2935 | case FC_TGTID_BIND_BY_ID: | |
2936 | rport->node_name = -1; | |
2937 | rport->port_name = -1; | |
2938 | break; | |
2939 | case FC_TGTID_BIND_NONE: /* to keep compiler happy */ | |
2940 | break; | |
2941 | } | |
2942 | ||
19a7b4ae JSEC |
2943 | /* |
2944 | * As this only occurs if the remote port (scsi target) | |
2945 | * went away and didn't come back - we'll remove | |
2946 | * all attached scsi devices. | |
2947 | */ | |
42e33148 | 2948 | spin_unlock_irqrestore(shost->host_lock, flags); |
a0785edf JS |
2949 | |
2950 | scsi_target_unblock(&rport->dev); | |
2951 | fc_queue_work(shost, &rport->stgt_delete_work); | |
1da177e4 | 2952 | } |
1da177e4 | 2953 | |
0f29b966 JS |
2954 | /** |
2955 | * fc_timeout_fail_rport_io - Timeout handler for a fast io failing on a | |
2956 | * disconnected SCSI target. | |
2957 | * | |
c4028958 | 2958 | * @work: rport to terminate io on. |
0f29b966 JS |
2959 | * |
2960 | * Notes: Only requests the failure of the io, not that all are flushed | |
2961 | * prior to returning. | |
2962 | **/ | |
2963 | static void | |
c4028958 | 2964 | fc_timeout_fail_rport_io(struct work_struct *work) |
0f29b966 | 2965 | { |
c4028958 DH |
2966 | struct fc_rport *rport = |
2967 | container_of(work, struct fc_rport, fail_io_work.work); | |
0f29b966 JS |
2968 | struct Scsi_Host *shost = rport_to_shost(rport); |
2969 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
2970 | ||
2971 | if (rport->port_state != FC_PORTSTATE_BLOCKED) | |
2972 | return; | |
2973 | ||
2974 | i->f->terminate_rport_io(rport); | |
2975 | } | |
2976 | ||
1da177e4 LT |
2977 | /** |
2978 | * fc_scsi_scan_rport - called to perform a scsi scan on a remote port. | |
19a7b4ae | 2979 | * |
c4028958 | 2980 | * @work: remote port to be scanned. |
1da177e4 LT |
2981 | **/ |
2982 | static void | |
c4028958 | 2983 | fc_scsi_scan_rport(struct work_struct *work) |
1da177e4 | 2984 | { |
c4028958 DH |
2985 | struct fc_rport *rport = |
2986 | container_of(work, struct fc_rport, scan_work); | |
aedf3497 | 2987 | struct Scsi_Host *shost = rport_to_shost(rport); |
42e33148 JSEC |
2988 | unsigned long flags; |
2989 | ||
aedf3497 | 2990 | if ((rport->port_state == FC_PORTSTATE_ONLINE) && |
a53eb5e0 | 2991 | (rport->roles & FC_PORT_ROLE_FCP_TARGET)) { |
aedf3497 JS |
2992 | scsi_scan_target(&rport->dev, rport->channel, |
2993 | rport->scsi_target_id, SCAN_WILD_CARD, 1); | |
42e33148 | 2994 | } |
aedf3497 JS |
2995 | |
2996 | spin_lock_irqsave(shost->host_lock, flags); | |
2997 | rport->flags &= ~FC_RPORT_SCAN_PENDING; | |
42e33148 JSEC |
2998 | spin_unlock_irqrestore(shost->host_lock, flags); |
2999 | } | |
3000 | ||
3001 | ||
a53eb5e0 JS |
3002 | /** |
3003 | * fc_vport_create - allocates and creates a FC virtual port. | |
3004 | * @shost: scsi host the virtual port is connected to. | |
3005 | * @channel: Channel on shost port connected to. | |
3006 | * @pdev: parent device for vport | |
3007 | * @ids: The world wide names, FC4 port roles, etc for | |
3008 | * the virtual port. | |
3009 | * @ret_vport: The pointer to the created vport. | |
3010 | * | |
3011 | * Allocates and creates the vport structure, calls the parent host | |
3012 | * to instantiate the vport, the completes w/ class and sysfs creation. | |
3013 | * | |
3014 | * Notes: | |
3015 | * This routine assumes no locks are held on entry. | |
3016 | **/ | |
3017 | static int | |
3018 | fc_vport_create(struct Scsi_Host *shost, int channel, struct device *pdev, | |
3019 | struct fc_vport_identifiers *ids, struct fc_vport **ret_vport) | |
3020 | { | |
3021 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); | |
3022 | struct fc_internal *fci = to_fc_internal(shost->transportt); | |
3023 | struct fc_vport *vport; | |
3024 | struct device *dev; | |
3025 | unsigned long flags; | |
3026 | size_t size; | |
3027 | int error; | |
3028 | ||
3029 | *ret_vport = NULL; | |
3030 | ||
3031 | if ( ! fci->f->vport_create) | |
3032 | return -ENOENT; | |
3033 | ||
3034 | size = (sizeof(struct fc_vport) + fci->f->dd_fcvport_size); | |
3035 | vport = kzalloc(size, GFP_KERNEL); | |
3036 | if (unlikely(!vport)) { | |
3037 | printk(KERN_ERR "%s: allocation failure\n", __FUNCTION__); | |
3038 | return -ENOMEM; | |
3039 | } | |
3040 | ||
3041 | vport->vport_state = FC_VPORT_UNKNOWN; | |
3042 | vport->vport_last_state = FC_VPORT_UNKNOWN; | |
3043 | vport->node_name = ids->node_name; | |
3044 | vport->port_name = ids->port_name; | |
3045 | vport->roles = ids->roles; | |
3046 | vport->vport_type = ids->vport_type; | |
3047 | if (fci->f->dd_fcvport_size) | |
3048 | vport->dd_data = &vport[1]; | |
3049 | vport->shost = shost; | |
3050 | vport->channel = channel; | |
3051 | vport->flags = FC_VPORT_CREATING; | |
9ef3e4a4 | 3052 | INIT_WORK(&vport->vport_delete_work, fc_vport_sched_delete); |
a53eb5e0 JS |
3053 | |
3054 | spin_lock_irqsave(shost->host_lock, flags); | |
3055 | ||
3056 | if (fc_host->npiv_vports_inuse >= fc_host->max_npiv_vports) { | |
3057 | spin_unlock_irqrestore(shost->host_lock, flags); | |
3058 | kfree(vport); | |
3059 | return -ENOSPC; | |
3060 | } | |
3061 | fc_host->npiv_vports_inuse++; | |
3062 | vport->number = fc_host->next_vport_number++; | |
3063 | list_add_tail(&vport->peers, &fc_host->vports); | |
3064 | get_device(&shost->shost_gendev); /* for fc_host->vport list */ | |
3065 | ||
3066 | spin_unlock_irqrestore(shost->host_lock, flags); | |
3067 | ||
3068 | dev = &vport->dev; | |
3069 | device_initialize(dev); /* takes self reference */ | |
3070 | dev->parent = get_device(pdev); /* takes parent reference */ | |
3071 | dev->release = fc_vport_dev_release; | |
3072 | sprintf(dev->bus_id, "vport-%d:%d-%d", | |
3073 | shost->host_no, channel, vport->number); | |
3074 | transport_setup_device(dev); | |
3075 | ||
3076 | error = device_add(dev); | |
3077 | if (error) { | |
3078 | printk(KERN_ERR "FC Virtual Port device_add failed\n"); | |
3079 | goto delete_vport; | |
3080 | } | |
3081 | transport_add_device(dev); | |
3082 | transport_configure_device(dev); | |
3083 | ||
3084 | error = fci->f->vport_create(vport, ids->disable); | |
3085 | if (error) { | |
3086 | printk(KERN_ERR "FC Virtual Port LLDD Create failed\n"); | |
3087 | goto delete_vport_all; | |
3088 | } | |
3089 | ||
3090 | /* | |
3091 | * if the parent isn't the physical adapter's Scsi_Host, ensure | |
3092 | * the Scsi_Host at least contains ia symlink to the vport. | |
3093 | */ | |
3094 | if (pdev != &shost->shost_gendev) { | |
3095 | error = sysfs_create_link(&shost->shost_gendev.kobj, | |
3096 | &dev->kobj, dev->bus_id); | |
3097 | if (error) | |
3098 | printk(KERN_ERR | |
3099 | "%s: Cannot create vport symlinks for " | |
3100 | "%s, err=%d\n", | |
3101 | __FUNCTION__, dev->bus_id, error); | |
3102 | } | |
3103 | spin_lock_irqsave(shost->host_lock, flags); | |
3104 | vport->flags &= ~FC_VPORT_CREATING; | |
3105 | spin_unlock_irqrestore(shost->host_lock, flags); | |
3106 | ||
3107 | dev_printk(KERN_NOTICE, pdev, | |
3108 | "%s created via shost%d channel %d\n", dev->bus_id, | |
3109 | shost->host_no, channel); | |
3110 | ||
3111 | *ret_vport = vport; | |
3112 | ||
3113 | return 0; | |
3114 | ||
3115 | delete_vport_all: | |
3116 | transport_remove_device(dev); | |
3117 | device_del(dev); | |
3118 | delete_vport: | |
3119 | transport_destroy_device(dev); | |
3120 | spin_lock_irqsave(shost->host_lock, flags); | |
3121 | list_del(&vport->peers); | |
3122 | put_device(&shost->shost_gendev); /* for fc_host->vport list */ | |
3123 | fc_host->npiv_vports_inuse--; | |
3124 | spin_unlock_irqrestore(shost->host_lock, flags); | |
3125 | put_device(dev->parent); | |
3126 | kfree(vport); | |
3127 | ||
3128 | return error; | |
3129 | } | |
3130 | ||
3131 | ||
3132 | /** | |
3133 | * fc_vport_terminate - Admin App or LLDD requests termination of a vport | |
3134 | * @vport: fc_vport to be terminated | |
3135 | * | |
3136 | * Calls the LLDD vport_delete() function, then deallocates and removes | |
3137 | * the vport from the shost and object tree. | |
3138 | * | |
3139 | * Notes: | |
3140 | * This routine assumes no locks are held on entry. | |
3141 | **/ | |
3142 | int | |
3143 | fc_vport_terminate(struct fc_vport *vport) | |
3144 | { | |
3145 | struct Scsi_Host *shost = vport_to_shost(vport); | |
3146 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); | |
3147 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
3148 | struct device *dev = &vport->dev; | |
3149 | unsigned long flags; | |
3150 | int stat; | |
3151 | ||
3152 | spin_lock_irqsave(shost->host_lock, flags); | |
3153 | if (vport->flags & FC_VPORT_CREATING) { | |
3154 | spin_unlock_irqrestore(shost->host_lock, flags); | |
3155 | return -EBUSY; | |
3156 | } | |
3157 | if (vport->flags & (FC_VPORT_DEL)) { | |
3158 | spin_unlock_irqrestore(shost->host_lock, flags); | |
3159 | return -EALREADY; | |
3160 | } | |
3161 | vport->flags |= FC_VPORT_DELETING; | |
3162 | spin_unlock_irqrestore(shost->host_lock, flags); | |
3163 | ||
3164 | if (i->f->vport_delete) | |
3165 | stat = i->f->vport_delete(vport); | |
3166 | else | |
3167 | stat = -ENOENT; | |
3168 | ||
3169 | spin_lock_irqsave(shost->host_lock, flags); | |
3170 | vport->flags &= ~FC_VPORT_DELETING; | |
3171 | if (!stat) { | |
3172 | vport->flags |= FC_VPORT_DELETED; | |
3173 | list_del(&vport->peers); | |
3174 | fc_host->npiv_vports_inuse--; | |
3175 | put_device(&shost->shost_gendev); /* for fc_host->vport list */ | |
3176 | } | |
3177 | spin_unlock_irqrestore(shost->host_lock, flags); | |
3178 | ||
3179 | if (stat) | |
3180 | return stat; | |
3181 | ||
3182 | if (dev->parent != &shost->shost_gendev) | |
3183 | sysfs_remove_link(&shost->shost_gendev.kobj, dev->bus_id); | |
3184 | transport_remove_device(dev); | |
3185 | device_del(dev); | |
3186 | transport_destroy_device(dev); | |
3187 | ||
3188 | /* | |
3189 | * Removing our self-reference should mean our | |
3190 | * release function gets called, which will drop the remaining | |
3191 | * parent reference and free the data structure. | |
3192 | */ | |
3193 | put_device(dev); /* for self-reference */ | |
3194 | ||
3195 | return 0; /* SUCCESS */ | |
3196 | } | |
3197 | EXPORT_SYMBOL(fc_vport_terminate); | |
3198 | ||
9ef3e4a4 JS |
3199 | /** |
3200 | * fc_vport_sched_delete - workq-based delete request for a vport | |
3201 | * | |
3202 | * @work: vport to be deleted. | |
3203 | **/ | |
3204 | static void | |
3205 | fc_vport_sched_delete(struct work_struct *work) | |
3206 | { | |
3207 | struct fc_vport *vport = | |
3208 | container_of(work, struct fc_vport, vport_delete_work); | |
3209 | int stat; | |
3210 | ||
3211 | stat = fc_vport_terminate(vport); | |
3212 | if (stat) | |
3213 | dev_printk(KERN_ERR, vport->dev.parent, | |
3214 | "%s: %s could not be deleted created via " | |
3215 | "shost%d channel %d - error %d\n", __FUNCTION__, | |
3216 | vport->dev.bus_id, vport->shost->host_no, | |
3217 | vport->channel, stat); | |
3218 | } | |
3219 | ||
a53eb5e0 | 3220 | |
9ef3e4a4 JS |
3221 | /* Original Author: Martin Hicks */ |
3222 | MODULE_AUTHOR("James Smart"); | |
1da177e4 LT |
3223 | MODULE_DESCRIPTION("FC Transport Attributes"); |
3224 | MODULE_LICENSE("GPL"); | |
3225 | ||
3226 | module_init(fc_transport_init); | |
3227 | module_exit(fc_transport_exit); |