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Commit | Line | Data |
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9ef3e4a4 | 1 | /* |
1da177e4 LT |
2 | * FiberChannel transport specific attributes exported to sysfs. |
3 | * | |
4 | * Copyright (c) 2003 Silicon Graphics, Inc. All rights reserved. | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
19 | * | |
20 | * ======== | |
21 | * | |
a53eb5e0 | 22 | * Copyright (C) 2004-2007 James Smart, Emulex Corporation |
1da177e4 LT |
23 | * Rewrite for host, target, device, and remote port attributes, |
24 | * statistics, and service functions... | |
9ef3e4a4 | 25 | * Add vports, etc |
1da177e4 LT |
26 | * |
27 | */ | |
28 | #include <linux/module.h> | |
29 | #include <linux/init.h> | |
5a0e3ad6 | 30 | #include <linux/slab.h> |
65d430fa | 31 | #include <linux/delay.h> |
1da177e4 LT |
32 | #include <scsi/scsi_device.h> |
33 | #include <scsi/scsi_host.h> | |
34 | #include <scsi/scsi_transport.h> | |
35 | #include <scsi/scsi_transport_fc.h> | |
c829c394 | 36 | #include <scsi/scsi_cmnd.h> |
84314fd4 JS |
37 | #include <linux/netlink.h> |
38 | #include <net/netlink.h> | |
39 | #include <scsi/scsi_netlink_fc.h> | |
9e4f5e29 | 40 | #include <scsi/scsi_bsg_fc.h> |
1da177e4 | 41 | #include "scsi_priv.h" |
7525236d | 42 | #include "scsi_transport_fc_internal.h" |
1da177e4 | 43 | |
aedf3497 | 44 | static int fc_queue_work(struct Scsi_Host *, struct work_struct *); |
9ef3e4a4 | 45 | static void fc_vport_sched_delete(struct work_struct *work); |
a30c3f69 | 46 | static int fc_vport_setup(struct Scsi_Host *shost, int channel, |
a53eb5e0 JS |
47 | struct device *pdev, struct fc_vport_identifiers *ids, |
48 | struct fc_vport **vport); | |
9e4f5e29 JS |
49 | static int fc_bsg_hostadd(struct Scsi_Host *, struct fc_host_attrs *); |
50 | static int fc_bsg_rportadd(struct Scsi_Host *, struct fc_rport *); | |
51 | static void fc_bsg_remove(struct request_queue *); | |
52 | static void fc_bsg_goose_queue(struct fc_rport *); | |
a53eb5e0 | 53 | |
1da177e4 LT |
54 | /* |
55 | * Redefine so that we can have same named attributes in the | |
56 | * sdev/starget/host objects. | |
57 | */ | |
ee959b00 TJ |
58 | #define FC_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \ |
59 | struct device_attribute device_attr_##_prefix##_##_name = \ | |
1da177e4 LT |
60 | __ATTR(_name,_mode,_show,_store) |
61 | ||
62 | #define fc_enum_name_search(title, table_type, table) \ | |
63 | static const char *get_fc_##title##_name(enum table_type table_key) \ | |
64 | { \ | |
65 | int i; \ | |
66 | char *name = NULL; \ | |
67 | \ | |
6391a113 | 68 | for (i = 0; i < ARRAY_SIZE(table); i++) { \ |
1da177e4 LT |
69 | if (table[i].value == table_key) { \ |
70 | name = table[i].name; \ | |
71 | break; \ | |
72 | } \ | |
73 | } \ | |
74 | return name; \ | |
75 | } | |
76 | ||
77 | #define fc_enum_name_match(title, table_type, table) \ | |
78 | static int get_fc_##title##_match(const char *table_key, \ | |
79 | enum table_type *value) \ | |
80 | { \ | |
81 | int i; \ | |
82 | \ | |
6391a113 | 83 | for (i = 0; i < ARRAY_SIZE(table); i++) { \ |
1da177e4 LT |
84 | if (strncmp(table_key, table[i].name, \ |
85 | table[i].matchlen) == 0) { \ | |
86 | *value = table[i].value; \ | |
87 | return 0; /* success */ \ | |
88 | } \ | |
89 | } \ | |
90 | return 1; /* failure */ \ | |
91 | } | |
92 | ||
93 | ||
94 | /* Convert fc_port_type values to ascii string name */ | |
95 | static struct { | |
96 | enum fc_port_type value; | |
97 | char *name; | |
98 | } fc_port_type_names[] = { | |
99 | { FC_PORTTYPE_UNKNOWN, "Unknown" }, | |
100 | { FC_PORTTYPE_OTHER, "Other" }, | |
101 | { FC_PORTTYPE_NOTPRESENT, "Not Present" }, | |
102 | { FC_PORTTYPE_NPORT, "NPort (fabric via point-to-point)" }, | |
103 | { FC_PORTTYPE_NLPORT, "NLPort (fabric via loop)" }, | |
104 | { FC_PORTTYPE_LPORT, "LPort (private loop)" }, | |
951948a3 | 105 | { FC_PORTTYPE_PTP, "Point-To-Point (direct nport connection)" }, |
a53eb5e0 | 106 | { FC_PORTTYPE_NPIV, "NPIV VPORT" }, |
1da177e4 LT |
107 | }; |
108 | fc_enum_name_search(port_type, fc_port_type, fc_port_type_names) | |
109 | #define FC_PORTTYPE_MAX_NAMELEN 50 | |
110 | ||
a53eb5e0 JS |
111 | /* Reuse fc_port_type enum function for vport_type */ |
112 | #define get_fc_vport_type_name get_fc_port_type_name | |
113 | ||
1da177e4 | 114 | |
84314fd4 JS |
115 | /* Convert fc_host_event_code values to ascii string name */ |
116 | static const struct { | |
117 | enum fc_host_event_code value; | |
118 | char *name; | |
119 | } fc_host_event_code_names[] = { | |
120 | { FCH_EVT_LIP, "lip" }, | |
121 | { FCH_EVT_LINKUP, "link_up" }, | |
122 | { FCH_EVT_LINKDOWN, "link_down" }, | |
123 | { FCH_EVT_LIPRESET, "lip_reset" }, | |
124 | { FCH_EVT_RSCN, "rscn" }, | |
125 | { FCH_EVT_ADAPTER_CHANGE, "adapter_chg" }, | |
126 | { FCH_EVT_PORT_UNKNOWN, "port_unknown" }, | |
127 | { FCH_EVT_PORT_ONLINE, "port_online" }, | |
128 | { FCH_EVT_PORT_OFFLINE, "port_offline" }, | |
129 | { FCH_EVT_PORT_FABRIC, "port_fabric" }, | |
130 | { FCH_EVT_LINK_UNKNOWN, "link_unknown" }, | |
131 | { FCH_EVT_VENDOR_UNIQUE, "vendor_unique" }, | |
132 | }; | |
133 | fc_enum_name_search(host_event_code, fc_host_event_code, | |
134 | fc_host_event_code_names) | |
135 | #define FC_HOST_EVENT_CODE_MAX_NAMELEN 30 | |
136 | ||
137 | ||
1da177e4 LT |
138 | /* Convert fc_port_state values to ascii string name */ |
139 | static struct { | |
140 | enum fc_port_state value; | |
141 | char *name; | |
142 | } fc_port_state_names[] = { | |
143 | { FC_PORTSTATE_UNKNOWN, "Unknown" }, | |
144 | { FC_PORTSTATE_NOTPRESENT, "Not Present" }, | |
145 | { FC_PORTSTATE_ONLINE, "Online" }, | |
146 | { FC_PORTSTATE_OFFLINE, "Offline" }, | |
147 | { FC_PORTSTATE_BLOCKED, "Blocked" }, | |
148 | { FC_PORTSTATE_BYPASSED, "Bypassed" }, | |
149 | { FC_PORTSTATE_DIAGNOSTICS, "Diagnostics" }, | |
150 | { FC_PORTSTATE_LINKDOWN, "Linkdown" }, | |
151 | { FC_PORTSTATE_ERROR, "Error" }, | |
152 | { FC_PORTSTATE_LOOPBACK, "Loopback" }, | |
42e33148 | 153 | { FC_PORTSTATE_DELETED, "Deleted" }, |
1da177e4 LT |
154 | }; |
155 | fc_enum_name_search(port_state, fc_port_state, fc_port_state_names) | |
156 | #define FC_PORTSTATE_MAX_NAMELEN 20 | |
157 | ||
158 | ||
a53eb5e0 JS |
159 | /* Convert fc_vport_state values to ascii string name */ |
160 | static struct { | |
161 | enum fc_vport_state value; | |
162 | char *name; | |
163 | } fc_vport_state_names[] = { | |
164 | { FC_VPORT_UNKNOWN, "Unknown" }, | |
165 | { FC_VPORT_ACTIVE, "Active" }, | |
166 | { FC_VPORT_DISABLED, "Disabled" }, | |
167 | { FC_VPORT_LINKDOWN, "Linkdown" }, | |
168 | { FC_VPORT_INITIALIZING, "Initializing" }, | |
169 | { FC_VPORT_NO_FABRIC_SUPP, "No Fabric Support" }, | |
170 | { FC_VPORT_NO_FABRIC_RSCS, "No Fabric Resources" }, | |
171 | { FC_VPORT_FABRIC_LOGOUT, "Fabric Logout" }, | |
172 | { FC_VPORT_FABRIC_REJ_WWN, "Fabric Rejected WWN" }, | |
173 | { FC_VPORT_FAILED, "VPort Failed" }, | |
174 | }; | |
175 | fc_enum_name_search(vport_state, fc_vport_state, fc_vport_state_names) | |
176 | #define FC_VPORTSTATE_MAX_NAMELEN 24 | |
177 | ||
178 | /* Reuse fc_vport_state enum function for vport_last_state */ | |
179 | #define get_fc_vport_last_state_name get_fc_vport_state_name | |
180 | ||
181 | ||
1da177e4 | 182 | /* Convert fc_tgtid_binding_type values to ascii string name */ |
0ad78200 | 183 | static const struct { |
1da177e4 LT |
184 | enum fc_tgtid_binding_type value; |
185 | char *name; | |
186 | int matchlen; | |
187 | } fc_tgtid_binding_type_names[] = { | |
188 | { FC_TGTID_BIND_NONE, "none", 4 }, | |
189 | { FC_TGTID_BIND_BY_WWPN, "wwpn (World Wide Port Name)", 4 }, | |
190 | { FC_TGTID_BIND_BY_WWNN, "wwnn (World Wide Node Name)", 4 }, | |
191 | { FC_TGTID_BIND_BY_ID, "port_id (FC Address)", 7 }, | |
192 | }; | |
193 | fc_enum_name_search(tgtid_bind_type, fc_tgtid_binding_type, | |
194 | fc_tgtid_binding_type_names) | |
195 | fc_enum_name_match(tgtid_bind_type, fc_tgtid_binding_type, | |
196 | fc_tgtid_binding_type_names) | |
197 | #define FC_BINDTYPE_MAX_NAMELEN 30 | |
198 | ||
199 | ||
200 | #define fc_bitfield_name_search(title, table) \ | |
201 | static ssize_t \ | |
202 | get_fc_##title##_names(u32 table_key, char *buf) \ | |
203 | { \ | |
204 | char *prefix = ""; \ | |
205 | ssize_t len = 0; \ | |
206 | int i; \ | |
207 | \ | |
6391a113 | 208 | for (i = 0; i < ARRAY_SIZE(table); i++) { \ |
1da177e4 LT |
209 | if (table[i].value & table_key) { \ |
210 | len += sprintf(buf + len, "%s%s", \ | |
211 | prefix, table[i].name); \ | |
212 | prefix = ", "; \ | |
213 | } \ | |
214 | } \ | |
215 | len += sprintf(buf + len, "\n"); \ | |
216 | return len; \ | |
217 | } | |
218 | ||
219 | ||
220 | /* Convert FC_COS bit values to ascii string name */ | |
0ad78200 | 221 | static const struct { |
1da177e4 LT |
222 | u32 value; |
223 | char *name; | |
224 | } fc_cos_names[] = { | |
225 | { FC_COS_CLASS1, "Class 1" }, | |
226 | { FC_COS_CLASS2, "Class 2" }, | |
227 | { FC_COS_CLASS3, "Class 3" }, | |
228 | { FC_COS_CLASS4, "Class 4" }, | |
229 | { FC_COS_CLASS6, "Class 6" }, | |
230 | }; | |
231 | fc_bitfield_name_search(cos, fc_cos_names) | |
232 | ||
233 | ||
234 | /* Convert FC_PORTSPEED bit values to ascii string name */ | |
0ad78200 | 235 | static const struct { |
1da177e4 LT |
236 | u32 value; |
237 | char *name; | |
238 | } fc_port_speed_names[] = { | |
239 | { FC_PORTSPEED_1GBIT, "1 Gbit" }, | |
240 | { FC_PORTSPEED_2GBIT, "2 Gbit" }, | |
241 | { FC_PORTSPEED_4GBIT, "4 Gbit" }, | |
242 | { FC_PORTSPEED_10GBIT, "10 Gbit" }, | |
c3d2350a JS |
243 | { FC_PORTSPEED_8GBIT, "8 Gbit" }, |
244 | { FC_PORTSPEED_16GBIT, "16 Gbit" }, | |
1da177e4 LT |
245 | { FC_PORTSPEED_NOT_NEGOTIATED, "Not Negotiated" }, |
246 | }; | |
247 | fc_bitfield_name_search(port_speed, fc_port_speed_names) | |
248 | ||
249 | ||
250 | static int | |
251 | show_fc_fc4s (char *buf, u8 *fc4_list) | |
252 | { | |
253 | int i, len=0; | |
254 | ||
255 | for (i = 0; i < FC_FC4_LIST_SIZE; i++, fc4_list++) | |
256 | len += sprintf(buf + len , "0x%02x ", *fc4_list); | |
257 | len += sprintf(buf + len, "\n"); | |
258 | return len; | |
259 | } | |
260 | ||
261 | ||
a53eb5e0 | 262 | /* Convert FC_PORT_ROLE bit values to ascii string name */ |
0ad78200 | 263 | static const struct { |
1da177e4 LT |
264 | u32 value; |
265 | char *name; | |
a53eb5e0 JS |
266 | } fc_port_role_names[] = { |
267 | { FC_PORT_ROLE_FCP_TARGET, "FCP Target" }, | |
268 | { FC_PORT_ROLE_FCP_INITIATOR, "FCP Initiator" }, | |
269 | { FC_PORT_ROLE_IP_PORT, "IP Port" }, | |
1da177e4 | 270 | }; |
a53eb5e0 | 271 | fc_bitfield_name_search(port_roles, fc_port_role_names) |
1da177e4 LT |
272 | |
273 | /* | |
274 | * Define roles that are specific to port_id. Values are relative to ROLE_MASK. | |
275 | */ | |
276 | #define FC_WELLKNOWN_PORTID_MASK 0xfffff0 | |
277 | #define FC_WELLKNOWN_ROLE_MASK 0x00000f | |
278 | #define FC_FPORT_PORTID 0x00000e | |
279 | #define FC_FABCTLR_PORTID 0x00000d | |
280 | #define FC_DIRSRVR_PORTID 0x00000c | |
281 | #define FC_TIMESRVR_PORTID 0x00000b | |
282 | #define FC_MGMTSRVR_PORTID 0x00000a | |
283 | ||
284 | ||
c4028958 DH |
285 | static void fc_timeout_deleted_rport(struct work_struct *work); |
286 | static void fc_timeout_fail_rport_io(struct work_struct *work); | |
287 | static void fc_scsi_scan_rport(struct work_struct *work); | |
1da177e4 LT |
288 | |
289 | /* | |
290 | * Attribute counts pre object type... | |
291 | * Increase these values if you add attributes | |
292 | */ | |
293 | #define FC_STARGET_NUM_ATTRS 3 | |
0f29b966 | 294 | #define FC_RPORT_NUM_ATTRS 10 |
a53eb5e0 | 295 | #define FC_VPORT_NUM_ATTRS 9 |
4643682b | 296 | #define FC_HOST_NUM_ATTRS 22 |
1da177e4 LT |
297 | |
298 | struct fc_internal { | |
299 | struct scsi_transport_template t; | |
300 | struct fc_function_template *f; | |
301 | ||
302 | /* | |
303 | * For attributes : each object has : | |
304 | * An array of the actual attributes structures | |
305 | * An array of null-terminated pointers to the attribute | |
306 | * structures - used for mid-layer interaction. | |
307 | * | |
308 | * The attribute containers for the starget and host are are | |
309 | * part of the midlayer. As the remote port is specific to the | |
310 | * fc transport, we must provide the attribute container. | |
311 | */ | |
ee959b00 | 312 | struct device_attribute private_starget_attrs[ |
1da177e4 | 313 | FC_STARGET_NUM_ATTRS]; |
ee959b00 | 314 | struct device_attribute *starget_attrs[FC_STARGET_NUM_ATTRS + 1]; |
1da177e4 | 315 | |
ee959b00 TJ |
316 | struct device_attribute private_host_attrs[FC_HOST_NUM_ATTRS]; |
317 | struct device_attribute *host_attrs[FC_HOST_NUM_ATTRS + 1]; | |
1da177e4 LT |
318 | |
319 | struct transport_container rport_attr_cont; | |
ee959b00 TJ |
320 | struct device_attribute private_rport_attrs[FC_RPORT_NUM_ATTRS]; |
321 | struct device_attribute *rport_attrs[FC_RPORT_NUM_ATTRS + 1]; | |
a53eb5e0 JS |
322 | |
323 | struct transport_container vport_attr_cont; | |
ee959b00 TJ |
324 | struct device_attribute private_vport_attrs[FC_VPORT_NUM_ATTRS]; |
325 | struct device_attribute *vport_attrs[FC_VPORT_NUM_ATTRS + 1]; | |
1da177e4 LT |
326 | }; |
327 | ||
328 | #define to_fc_internal(tmpl) container_of(tmpl, struct fc_internal, t) | |
329 | ||
d0a7e574 | 330 | static int fc_target_setup(struct transport_container *tc, struct device *dev, |
ee959b00 | 331 | struct device *cdev) |
1da177e4 LT |
332 | { |
333 | struct scsi_target *starget = to_scsi_target(dev); | |
334 | struct fc_rport *rport = starget_to_rport(starget); | |
335 | ||
336 | /* | |
337 | * if parent is remote port, use values from remote port. | |
338 | * Otherwise, this host uses the fc_transport, but not the | |
339 | * remote port interface. As such, initialize to known non-values. | |
340 | */ | |
341 | if (rport) { | |
342 | fc_starget_node_name(starget) = rport->node_name; | |
343 | fc_starget_port_name(starget) = rport->port_name; | |
344 | fc_starget_port_id(starget) = rport->port_id; | |
345 | } else { | |
346 | fc_starget_node_name(starget) = -1; | |
347 | fc_starget_port_name(starget) = -1; | |
348 | fc_starget_port_id(starget) = -1; | |
349 | } | |
350 | ||
351 | return 0; | |
352 | } | |
353 | ||
354 | static DECLARE_TRANSPORT_CLASS(fc_transport_class, | |
355 | "fc_transport", | |
356 | fc_target_setup, | |
357 | NULL, | |
358 | NULL); | |
359 | ||
d0a7e574 | 360 | static int fc_host_setup(struct transport_container *tc, struct device *dev, |
ee959b00 | 361 | struct device *cdev) |
1da177e4 LT |
362 | { |
363 | struct Scsi_Host *shost = dev_to_shost(dev); | |
aedf3497 | 364 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
1da177e4 | 365 | |
9ef3e4a4 | 366 | /* |
1da177e4 LT |
367 | * Set default values easily detected by the midlayer as |
368 | * failure cases. The scsi lldd is responsible for initializing | |
369 | * all transport attributes to valid values per host. | |
370 | */ | |
aedf3497 JS |
371 | fc_host->node_name = -1; |
372 | fc_host->port_name = -1; | |
373 | fc_host->permanent_port_name = -1; | |
374 | fc_host->supported_classes = FC_COS_UNSPECIFIED; | |
375 | memset(fc_host->supported_fc4s, 0, | |
376 | sizeof(fc_host->supported_fc4s)); | |
aedf3497 JS |
377 | fc_host->supported_speeds = FC_PORTSPEED_UNKNOWN; |
378 | fc_host->maxframe_size = -1; | |
a53eb5e0 | 379 | fc_host->max_npiv_vports = 0; |
aedf3497 JS |
380 | memset(fc_host->serial_number, 0, |
381 | sizeof(fc_host->serial_number)); | |
382 | ||
383 | fc_host->port_id = -1; | |
384 | fc_host->port_type = FC_PORTTYPE_UNKNOWN; | |
385 | fc_host->port_state = FC_PORTSTATE_UNKNOWN; | |
386 | memset(fc_host->active_fc4s, 0, | |
387 | sizeof(fc_host->active_fc4s)); | |
388 | fc_host->speed = FC_PORTSPEED_UNKNOWN; | |
389 | fc_host->fabric_name = -1; | |
b8d08210 JS |
390 | memset(fc_host->symbolic_name, 0, sizeof(fc_host->symbolic_name)); |
391 | memset(fc_host->system_hostname, 0, sizeof(fc_host->system_hostname)); | |
aedf3497 JS |
392 | |
393 | fc_host->tgtid_bind_type = FC_TGTID_BIND_BY_WWPN; | |
394 | ||
395 | INIT_LIST_HEAD(&fc_host->rports); | |
396 | INIT_LIST_HEAD(&fc_host->rport_bindings); | |
a53eb5e0 | 397 | INIT_LIST_HEAD(&fc_host->vports); |
aedf3497 JS |
398 | fc_host->next_rport_number = 0; |
399 | fc_host->next_target_id = 0; | |
a53eb5e0 JS |
400 | fc_host->next_vport_number = 0; |
401 | fc_host->npiv_vports_inuse = 0; | |
aedf3497 | 402 | |
aab0de24 KS |
403 | snprintf(fc_host->work_q_name, sizeof(fc_host->work_q_name), |
404 | "fc_wq_%d", shost->host_no); | |
aedf3497 JS |
405 | fc_host->work_q = create_singlethread_workqueue( |
406 | fc_host->work_q_name); | |
407 | if (!fc_host->work_q) | |
408 | return -ENOMEM; | |
409 | ||
aab0de24 KS |
410 | snprintf(fc_host->devloss_work_q_name, |
411 | sizeof(fc_host->devloss_work_q_name), | |
412 | "fc_dl_%d", shost->host_no); | |
aedf3497 JS |
413 | fc_host->devloss_work_q = create_singlethread_workqueue( |
414 | fc_host->devloss_work_q_name); | |
415 | if (!fc_host->devloss_work_q) { | |
416 | destroy_workqueue(fc_host->work_q); | |
417 | fc_host->work_q = NULL; | |
418 | return -ENOMEM; | |
419 | } | |
420 | ||
9e4f5e29 JS |
421 | fc_bsg_hostadd(shost, fc_host); |
422 | /* ignore any bsg add error - we just can't do sgio */ | |
423 | ||
424 | return 0; | |
425 | } | |
426 | ||
427 | static int fc_host_remove(struct transport_container *tc, struct device *dev, | |
428 | struct device *cdev) | |
429 | { | |
430 | struct Scsi_Host *shost = dev_to_shost(dev); | |
431 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); | |
432 | ||
433 | fc_bsg_remove(fc_host->rqst_q); | |
1da177e4 LT |
434 | return 0; |
435 | } | |
436 | ||
437 | static DECLARE_TRANSPORT_CLASS(fc_host_class, | |
438 | "fc_host", | |
439 | fc_host_setup, | |
9e4f5e29 | 440 | fc_host_remove, |
1da177e4 LT |
441 | NULL); |
442 | ||
443 | /* | |
444 | * Setup and Remove actions for remote ports are handled | |
445 | * in the service functions below. | |
446 | */ | |
447 | static DECLARE_TRANSPORT_CLASS(fc_rport_class, | |
448 | "fc_remote_ports", | |
449 | NULL, | |
450 | NULL, | |
451 | NULL); | |
452 | ||
a53eb5e0 JS |
453 | /* |
454 | * Setup and Remove actions for virtual ports are handled | |
455 | * in the service functions below. | |
456 | */ | |
457 | static DECLARE_TRANSPORT_CLASS(fc_vport_class, | |
458 | "fc_vports", | |
459 | NULL, | |
460 | NULL, | |
461 | NULL); | |
462 | ||
1da177e4 LT |
463 | /* |
464 | * Module Parameters | |
465 | */ | |
466 | ||
467 | /* | |
468 | * dev_loss_tmo: the default number of seconds that the FC transport | |
469 | * should insulate the loss of a remote port. | |
470 | * The maximum will be capped by the value of SCSI_DEVICE_BLOCK_MAX_TIMEOUT. | |
471 | */ | |
1c9e16e4 | 472 | static unsigned int fc_dev_loss_tmo = 60; /* seconds */ |
1da177e4 | 473 | |
10f4b89a | 474 | module_param_named(dev_loss_tmo, fc_dev_loss_tmo, uint, S_IRUGO|S_IWUSR); |
1da177e4 LT |
475 | MODULE_PARM_DESC(dev_loss_tmo, |
476 | "Maximum number of seconds that the FC transport should" | |
477 | " insulate the loss of a remote port. Once this value is" | |
478 | " exceeded, the scsi target is removed. Value should be" | |
f2818663 HR |
479 | " between 1 and SCSI_DEVICE_BLOCK_MAX_TIMEOUT if" |
480 | " fast_io_fail_tmo is not set."); | |
1da177e4 | 481 | |
eb44820c | 482 | /* |
84314fd4 | 483 | * Netlink Infrastructure |
eb44820c | 484 | */ |
84314fd4 JS |
485 | |
486 | static atomic_t fc_event_seq; | |
487 | ||
488 | /** | |
489 | * fc_get_event_number - Obtain the next sequential FC event number | |
490 | * | |
491 | * Notes: | |
eb44820c | 492 | * We could have inlined this, but it would have required fc_event_seq to |
84314fd4 JS |
493 | * be exposed. For now, live with the subroutine call. |
494 | * Atomic used to avoid lock/unlock... | |
eb44820c | 495 | */ |
84314fd4 JS |
496 | u32 |
497 | fc_get_event_number(void) | |
498 | { | |
499 | return atomic_add_return(1, &fc_event_seq); | |
500 | } | |
501 | EXPORT_SYMBOL(fc_get_event_number); | |
502 | ||
503 | ||
504 | /** | |
505 | * fc_host_post_event - called to post an even on an fc_host. | |
84314fd4 JS |
506 | * @shost: host the event occurred on |
507 | * @event_number: fc event number obtained from get_fc_event_number() | |
508 | * @event_code: fc_host event being posted | |
509 | * @event_data: 32bits of data for the event being posted | |
510 | * | |
511 | * Notes: | |
512 | * This routine assumes no locks are held on entry. | |
eb44820c | 513 | */ |
84314fd4 JS |
514 | void |
515 | fc_host_post_event(struct Scsi_Host *shost, u32 event_number, | |
516 | enum fc_host_event_code event_code, u32 event_data) | |
517 | { | |
518 | struct sk_buff *skb; | |
519 | struct nlmsghdr *nlh; | |
520 | struct fc_nl_event *event; | |
521 | const char *name; | |
522 | u32 len, skblen; | |
523 | int err; | |
524 | ||
525 | if (!scsi_nl_sock) { | |
526 | err = -ENOENT; | |
527 | goto send_fail; | |
528 | } | |
529 | ||
530 | len = FC_NL_MSGALIGN(sizeof(*event)); | |
531 | skblen = NLMSG_SPACE(len); | |
532 | ||
533 | skb = alloc_skb(skblen, GFP_KERNEL); | |
534 | if (!skb) { | |
535 | err = -ENOBUFS; | |
536 | goto send_fail; | |
537 | } | |
538 | ||
539 | nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, | |
540 | skblen - sizeof(*nlh), 0); | |
541 | if (!nlh) { | |
542 | err = -ENOBUFS; | |
543 | goto send_fail_skb; | |
544 | } | |
545 | event = NLMSG_DATA(nlh); | |
546 | ||
547 | INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC, | |
548 | FC_NL_ASYNC_EVENT, len); | |
549 | event->seconds = get_seconds(); | |
550 | event->vendor_id = 0; | |
551 | event->host_no = shost->host_no; | |
552 | event->event_datalen = sizeof(u32); /* bytes */ | |
553 | event->event_num = event_number; | |
554 | event->event_code = event_code; | |
555 | event->event_data = event_data; | |
556 | ||
ff491a73 PNA |
557 | nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS, |
558 | GFP_KERNEL); | |
84314fd4 JS |
559 | return; |
560 | ||
561 | send_fail_skb: | |
562 | kfree_skb(skb); | |
563 | send_fail: | |
564 | name = get_fc_host_event_code_name(event_code); | |
565 | printk(KERN_WARNING | |
566 | "%s: Dropped Event : host %d %s data 0x%08x - err %d\n", | |
cadbd4a5 | 567 | __func__, shost->host_no, |
84314fd4 JS |
568 | (name) ? name : "<unknown>", event_data, err); |
569 | return; | |
570 | } | |
571 | EXPORT_SYMBOL(fc_host_post_event); | |
572 | ||
573 | ||
574 | /** | |
eb44820c | 575 | * fc_host_post_vendor_event - called to post a vendor unique event on an fc_host |
84314fd4 JS |
576 | * @shost: host the event occurred on |
577 | * @event_number: fc event number obtained from get_fc_event_number() | |
578 | * @data_len: amount, in bytes, of vendor unique data | |
579 | * @data_buf: pointer to vendor unique data | |
eb44820c | 580 | * @vendor_id: Vendor id |
84314fd4 JS |
581 | * |
582 | * Notes: | |
583 | * This routine assumes no locks are held on entry. | |
eb44820c | 584 | */ |
84314fd4 JS |
585 | void |
586 | fc_host_post_vendor_event(struct Scsi_Host *shost, u32 event_number, | |
f14e2e29 | 587 | u32 data_len, char * data_buf, u64 vendor_id) |
84314fd4 JS |
588 | { |
589 | struct sk_buff *skb; | |
590 | struct nlmsghdr *nlh; | |
591 | struct fc_nl_event *event; | |
592 | u32 len, skblen; | |
593 | int err; | |
594 | ||
595 | if (!scsi_nl_sock) { | |
596 | err = -ENOENT; | |
597 | goto send_vendor_fail; | |
598 | } | |
599 | ||
600 | len = FC_NL_MSGALIGN(sizeof(*event) + data_len); | |
601 | skblen = NLMSG_SPACE(len); | |
602 | ||
603 | skb = alloc_skb(skblen, GFP_KERNEL); | |
604 | if (!skb) { | |
605 | err = -ENOBUFS; | |
606 | goto send_vendor_fail; | |
607 | } | |
608 | ||
609 | nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, | |
610 | skblen - sizeof(*nlh), 0); | |
611 | if (!nlh) { | |
612 | err = -ENOBUFS; | |
613 | goto send_vendor_fail_skb; | |
614 | } | |
615 | event = NLMSG_DATA(nlh); | |
616 | ||
617 | INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC, | |
618 | FC_NL_ASYNC_EVENT, len); | |
619 | event->seconds = get_seconds(); | |
620 | event->vendor_id = vendor_id; | |
621 | event->host_no = shost->host_no; | |
622 | event->event_datalen = data_len; /* bytes */ | |
623 | event->event_num = event_number; | |
624 | event->event_code = FCH_EVT_VENDOR_UNIQUE; | |
625 | memcpy(&event->event_data, data_buf, data_len); | |
626 | ||
ff491a73 PNA |
627 | nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS, |
628 | GFP_KERNEL); | |
84314fd4 JS |
629 | return; |
630 | ||
631 | send_vendor_fail_skb: | |
632 | kfree_skb(skb); | |
633 | send_vendor_fail: | |
634 | printk(KERN_WARNING | |
635 | "%s: Dropped Event : host %d vendor_unique - err %d\n", | |
cadbd4a5 | 636 | __func__, shost->host_no, err); |
84314fd4 JS |
637 | return; |
638 | } | |
639 | EXPORT_SYMBOL(fc_host_post_vendor_event); | |
640 | ||
641 | ||
1da177e4 LT |
642 | |
643 | static __init int fc_transport_init(void) | |
644 | { | |
84314fd4 JS |
645 | int error; |
646 | ||
647 | atomic_set(&fc_event_seq, 0); | |
648 | ||
649 | error = transport_class_register(&fc_host_class); | |
a53eb5e0 JS |
650 | if (error) |
651 | return error; | |
652 | error = transport_class_register(&fc_vport_class); | |
1da177e4 | 653 | if (error) |
48de68a4 | 654 | goto unreg_host_class; |
1da177e4 LT |
655 | error = transport_class_register(&fc_rport_class); |
656 | if (error) | |
48de68a4 MC |
657 | goto unreg_vport_class; |
658 | error = transport_class_register(&fc_transport_class); | |
659 | if (error) | |
660 | goto unreg_rport_class; | |
661 | return 0; | |
662 | ||
663 | unreg_rport_class: | |
664 | transport_class_unregister(&fc_rport_class); | |
665 | unreg_vport_class: | |
666 | transport_class_unregister(&fc_vport_class); | |
667 | unreg_host_class: | |
668 | transport_class_unregister(&fc_host_class); | |
669 | return error; | |
1da177e4 LT |
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 \ | |
ee959b00 TJ |
686 | show_fc_rport_##field (struct device *dev, \ |
687 | struct device_attribute *attr, char *buf) \ | |
1da177e4 | 688 | { \ |
ee959b00 | 689 | struct fc_rport *rport = transport_class_to_rport(dev); \ |
1da177e4 LT |
690 | struct Scsi_Host *shost = rport_to_shost(rport); \ |
691 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
19a7b4ae JSEC |
692 | if ((i->f->get_rport_##field) && \ |
693 | !((rport->port_state == FC_PORTSTATE_BLOCKED) || \ | |
42e33148 | 694 | (rport->port_state == FC_PORTSTATE_DELETED) || \ |
19a7b4ae | 695 | (rport->port_state == FC_PORTSTATE_NOTPRESENT))) \ |
1da177e4 LT |
696 | i->f->get_rport_##field(rport); \ |
697 | return snprintf(buf, sz, format_string, cast rport->field); \ | |
698 | } | |
699 | ||
700 | #define fc_rport_store_function(field) \ | |
701 | static ssize_t \ | |
ee959b00 TJ |
702 | store_fc_rport_##field(struct device *dev, \ |
703 | struct device_attribute *attr, \ | |
704 | const char *buf, size_t count) \ | |
1da177e4 LT |
705 | { \ |
706 | int val; \ | |
ee959b00 | 707 | struct fc_rport *rport = transport_class_to_rport(dev); \ |
1da177e4 LT |
708 | struct Scsi_Host *shost = rport_to_shost(rport); \ |
709 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
0f29b966 | 710 | char *cp; \ |
19a7b4ae | 711 | if ((rport->port_state == FC_PORTSTATE_BLOCKED) || \ |
42e33148 | 712 | (rport->port_state == FC_PORTSTATE_DELETED) || \ |
19a7b4ae JSEC |
713 | (rport->port_state == FC_PORTSTATE_NOTPRESENT)) \ |
714 | return -EBUSY; \ | |
0f29b966 JS |
715 | val = simple_strtoul(buf, &cp, 0); \ |
716 | if (*cp && (*cp != '\n')) \ | |
717 | return -EINVAL; \ | |
1da177e4 LT |
718 | i->f->set_rport_##field(rport, val); \ |
719 | return count; \ | |
720 | } | |
721 | ||
722 | #define fc_rport_rd_attr(field, format_string, sz) \ | |
723 | fc_rport_show_function(field, format_string, sz, ) \ | |
ee959b00 | 724 | static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ |
1da177e4 LT |
725 | show_fc_rport_##field, NULL) |
726 | ||
727 | #define fc_rport_rd_attr_cast(field, format_string, sz, cast) \ | |
728 | fc_rport_show_function(field, format_string, sz, (cast)) \ | |
ee959b00 | 729 | static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ |
1da177e4 LT |
730 | show_fc_rport_##field, NULL) |
731 | ||
732 | #define fc_rport_rw_attr(field, format_string, sz) \ | |
733 | fc_rport_show_function(field, format_string, sz, ) \ | |
734 | fc_rport_store_function(field) \ | |
ee959b00 | 735 | static FC_DEVICE_ATTR(rport, field, S_IRUGO | S_IWUSR, \ |
1da177e4 LT |
736 | show_fc_rport_##field, \ |
737 | store_fc_rport_##field) | |
738 | ||
739 | ||
740 | #define fc_private_rport_show_function(field, format_string, sz, cast) \ | |
741 | static ssize_t \ | |
ee959b00 TJ |
742 | show_fc_rport_##field (struct device *dev, \ |
743 | struct device_attribute *attr, char *buf) \ | |
1da177e4 | 744 | { \ |
ee959b00 | 745 | struct fc_rport *rport = transport_class_to_rport(dev); \ |
1da177e4 LT |
746 | return snprintf(buf, sz, format_string, cast rport->field); \ |
747 | } | |
748 | ||
749 | #define fc_private_rport_rd_attr(field, format_string, sz) \ | |
750 | fc_private_rport_show_function(field, format_string, sz, ) \ | |
ee959b00 | 751 | static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ |
1da177e4 LT |
752 | show_fc_rport_##field, NULL) |
753 | ||
754 | #define fc_private_rport_rd_attr_cast(field, format_string, sz, cast) \ | |
755 | fc_private_rport_show_function(field, format_string, sz, (cast)) \ | |
ee959b00 | 756 | static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ |
1da177e4 LT |
757 | show_fc_rport_##field, NULL) |
758 | ||
759 | ||
760 | #define fc_private_rport_rd_enum_attr(title, maxlen) \ | |
761 | static ssize_t \ | |
ee959b00 TJ |
762 | show_fc_rport_##title (struct device *dev, \ |
763 | struct device_attribute *attr, char *buf) \ | |
1da177e4 | 764 | { \ |
ee959b00 | 765 | struct fc_rport *rport = transport_class_to_rport(dev); \ |
1da177e4 LT |
766 | const char *name; \ |
767 | name = get_fc_##title##_name(rport->title); \ | |
768 | if (!name) \ | |
769 | return -EINVAL; \ | |
770 | return snprintf(buf, maxlen, "%s\n", name); \ | |
771 | } \ | |
ee959b00 | 772 | static FC_DEVICE_ATTR(rport, title, S_IRUGO, \ |
1da177e4 LT |
773 | show_fc_rport_##title, NULL) |
774 | ||
775 | ||
776 | #define SETUP_RPORT_ATTRIBUTE_RD(field) \ | |
ee959b00 | 777 | i->private_rport_attrs[count] = device_attr_rport_##field; \ |
1da177e4 LT |
778 | i->private_rport_attrs[count].attr.mode = S_IRUGO; \ |
779 | i->private_rport_attrs[count].store = NULL; \ | |
780 | i->rport_attrs[count] = &i->private_rport_attrs[count]; \ | |
781 | if (i->f->show_rport_##field) \ | |
782 | count++ | |
783 | ||
784 | #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(field) \ | |
ee959b00 | 785 | i->private_rport_attrs[count] = device_attr_rport_##field; \ |
1da177e4 LT |
786 | i->private_rport_attrs[count].attr.mode = S_IRUGO; \ |
787 | i->private_rport_attrs[count].store = NULL; \ | |
788 | i->rport_attrs[count] = &i->private_rport_attrs[count]; \ | |
789 | count++ | |
790 | ||
791 | #define SETUP_RPORT_ATTRIBUTE_RW(field) \ | |
ee959b00 | 792 | i->private_rport_attrs[count] = device_attr_rport_##field; \ |
1da177e4 LT |
793 | if (!i->f->set_rport_##field) { \ |
794 | i->private_rport_attrs[count].attr.mode = S_IRUGO; \ | |
795 | i->private_rport_attrs[count].store = NULL; \ | |
796 | } \ | |
797 | i->rport_attrs[count] = &i->private_rport_attrs[count]; \ | |
798 | if (i->f->show_rport_##field) \ | |
799 | count++ | |
800 | ||
0f29b966 JS |
801 | #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(field) \ |
802 | { \ | |
ee959b00 | 803 | i->private_rport_attrs[count] = device_attr_rport_##field; \ |
0f29b966 JS |
804 | i->rport_attrs[count] = &i->private_rport_attrs[count]; \ |
805 | count++; \ | |
806 | } | |
807 | ||
1da177e4 LT |
808 | |
809 | /* The FC Transport Remote Port Attributes: */ | |
810 | ||
811 | /* Fixed Remote Port Attributes */ | |
812 | ||
813 | fc_private_rport_rd_attr(maxframe_size, "%u bytes\n", 20); | |
814 | ||
815 | static ssize_t | |
ee959b00 TJ |
816 | show_fc_rport_supported_classes (struct device *dev, |
817 | struct device_attribute *attr, char *buf) | |
1da177e4 | 818 | { |
ee959b00 | 819 | struct fc_rport *rport = transport_class_to_rport(dev); |
1da177e4 LT |
820 | if (rport->supported_classes == FC_COS_UNSPECIFIED) |
821 | return snprintf(buf, 20, "unspecified\n"); | |
822 | return get_fc_cos_names(rport->supported_classes, buf); | |
823 | } | |
ee959b00 | 824 | static FC_DEVICE_ATTR(rport, supported_classes, S_IRUGO, |
1da177e4 LT |
825 | show_fc_rport_supported_classes, NULL); |
826 | ||
827 | /* Dynamic Remote Port Attributes */ | |
828 | ||
19a7b4ae JSEC |
829 | /* |
830 | * dev_loss_tmo attribute | |
831 | */ | |
832 | fc_rport_show_function(dev_loss_tmo, "%d\n", 20, ) | |
833 | static ssize_t | |
ee959b00 TJ |
834 | store_fc_rport_dev_loss_tmo(struct device *dev, struct device_attribute *attr, |
835 | const char *buf, size_t count) | |
19a7b4ae | 836 | { |
36dd288f | 837 | unsigned long val; |
ee959b00 | 838 | struct fc_rport *rport = transport_class_to_rport(dev); |
19a7b4ae JSEC |
839 | struct Scsi_Host *shost = rport_to_shost(rport); |
840 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
0f29b966 | 841 | char *cp; |
19a7b4ae | 842 | if ((rport->port_state == FC_PORTSTATE_BLOCKED) || |
42e33148 | 843 | (rport->port_state == FC_PORTSTATE_DELETED) || |
19a7b4ae JSEC |
844 | (rport->port_state == FC_PORTSTATE_NOTPRESENT)) |
845 | return -EBUSY; | |
0f29b966 | 846 | val = simple_strtoul(buf, &cp, 0); |
f2818663 | 847 | if ((*cp && (*cp != '\n')) || (val < 0)) |
19a7b4ae | 848 | return -EINVAL; |
f2818663 | 849 | |
36dd288f HR |
850 | /* |
851 | * Check for overflow; dev_loss_tmo is u32 | |
852 | */ | |
853 | if (val > UINT_MAX) | |
854 | return -EINVAL; | |
855 | ||
f2818663 HR |
856 | /* |
857 | * If fast_io_fail is off we have to cap | |
858 | * dev_loss_tmo at SCSI_DEVICE_BLOCK_MAX_TIMEOUT | |
859 | */ | |
860 | if (rport->fast_io_fail_tmo == -1 && | |
861 | val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT) | |
862 | return -EINVAL; | |
863 | ||
19a7b4ae JSEC |
864 | i->f->set_rport_dev_loss_tmo(rport, val); |
865 | return count; | |
866 | } | |
ee959b00 | 867 | static FC_DEVICE_ATTR(rport, dev_loss_tmo, S_IRUGO | S_IWUSR, |
19a7b4ae | 868 | show_fc_rport_dev_loss_tmo, store_fc_rport_dev_loss_tmo); |
1da177e4 LT |
869 | |
870 | ||
871 | /* Private Remote Port Attributes */ | |
872 | ||
873 | fc_private_rport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); | |
874 | fc_private_rport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); | |
875 | fc_private_rport_rd_attr(port_id, "0x%06x\n", 20); | |
876 | ||
877 | static ssize_t | |
ee959b00 TJ |
878 | show_fc_rport_roles (struct device *dev, struct device_attribute *attr, |
879 | char *buf) | |
1da177e4 | 880 | { |
ee959b00 | 881 | struct fc_rport *rport = transport_class_to_rport(dev); |
1da177e4 LT |
882 | |
883 | /* identify any roles that are port_id specific */ | |
884 | if ((rport->port_id != -1) && | |
885 | (rport->port_id & FC_WELLKNOWN_PORTID_MASK) == | |
886 | FC_WELLKNOWN_PORTID_MASK) { | |
887 | switch (rport->port_id & FC_WELLKNOWN_ROLE_MASK) { | |
888 | case FC_FPORT_PORTID: | |
889 | return snprintf(buf, 30, "Fabric Port\n"); | |
890 | case FC_FABCTLR_PORTID: | |
891 | return snprintf(buf, 30, "Fabric Controller\n"); | |
892 | case FC_DIRSRVR_PORTID: | |
893 | return snprintf(buf, 30, "Directory Server\n"); | |
894 | case FC_TIMESRVR_PORTID: | |
895 | return snprintf(buf, 30, "Time Server\n"); | |
896 | case FC_MGMTSRVR_PORTID: | |
897 | return snprintf(buf, 30, "Management Server\n"); | |
898 | default: | |
899 | return snprintf(buf, 30, "Unknown Fabric Entity\n"); | |
900 | } | |
901 | } else { | |
a53eb5e0 | 902 | if (rport->roles == FC_PORT_ROLE_UNKNOWN) |
1da177e4 | 903 | return snprintf(buf, 20, "unknown\n"); |
a53eb5e0 | 904 | return get_fc_port_roles_names(rport->roles, buf); |
1da177e4 LT |
905 | } |
906 | } | |
ee959b00 | 907 | static FC_DEVICE_ATTR(rport, roles, S_IRUGO, |
1da177e4 LT |
908 | show_fc_rport_roles, NULL); |
909 | ||
910 | fc_private_rport_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN); | |
911 | fc_private_rport_rd_attr(scsi_target_id, "%d\n", 20); | |
912 | ||
0f29b966 JS |
913 | /* |
914 | * fast_io_fail_tmo attribute | |
915 | */ | |
916 | static ssize_t | |
ee959b00 TJ |
917 | show_fc_rport_fast_io_fail_tmo (struct device *dev, |
918 | struct device_attribute *attr, char *buf) | |
0f29b966 | 919 | { |
ee959b00 | 920 | struct fc_rport *rport = transport_class_to_rport(dev); |
0f29b966 JS |
921 | |
922 | if (rport->fast_io_fail_tmo == -1) | |
923 | return snprintf(buf, 5, "off\n"); | |
924 | return snprintf(buf, 20, "%d\n", rport->fast_io_fail_tmo); | |
925 | } | |
926 | ||
927 | static ssize_t | |
ee959b00 TJ |
928 | store_fc_rport_fast_io_fail_tmo(struct device *dev, |
929 | struct device_attribute *attr, const char *buf, | |
930 | size_t count) | |
0f29b966 JS |
931 | { |
932 | int val; | |
933 | char *cp; | |
ee959b00 | 934 | struct fc_rport *rport = transport_class_to_rport(dev); |
0f29b966 JS |
935 | |
936 | if ((rport->port_state == FC_PORTSTATE_BLOCKED) || | |
937 | (rport->port_state == FC_PORTSTATE_DELETED) || | |
938 | (rport->port_state == FC_PORTSTATE_NOTPRESENT)) | |
939 | return -EBUSY; | |
940 | if (strncmp(buf, "off", 3) == 0) | |
941 | rport->fast_io_fail_tmo = -1; | |
942 | else { | |
943 | val = simple_strtoul(buf, &cp, 0); | |
f2818663 HR |
944 | if ((*cp && (*cp != '\n')) || (val < 0)) |
945 | return -EINVAL; | |
946 | /* | |
947 | * Cap fast_io_fail by dev_loss_tmo or | |
948 | * SCSI_DEVICE_BLOCK_MAX_TIMEOUT. | |
949 | */ | |
950 | if ((val >= rport->dev_loss_tmo) || | |
951 | (val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT)) | |
0f29b966 | 952 | return -EINVAL; |
f2818663 | 953 | |
0f29b966 JS |
954 | rport->fast_io_fail_tmo = val; |
955 | } | |
956 | return count; | |
957 | } | |
ee959b00 | 958 | static FC_DEVICE_ATTR(rport, fast_io_fail_tmo, S_IRUGO | S_IWUSR, |
0f29b966 | 959 | show_fc_rport_fast_io_fail_tmo, store_fc_rport_fast_io_fail_tmo); |
1da177e4 LT |
960 | |
961 | ||
962 | /* | |
963 | * FC SCSI Target Attribute Management | |
964 | */ | |
965 | ||
966 | /* | |
967 | * Note: in the target show function we recognize when the remote | |
a53eb5e0 | 968 | * port is in the heirarchy and do not allow the driver to get |
1da177e4 LT |
969 | * involved in sysfs functions. The driver only gets involved if |
970 | * it's the "old" style that doesn't use rports. | |
971 | */ | |
972 | #define fc_starget_show_function(field, format_string, sz, cast) \ | |
973 | static ssize_t \ | |
ee959b00 TJ |
974 | show_fc_starget_##field (struct device *dev, \ |
975 | struct device_attribute *attr, char *buf) \ | |
1da177e4 | 976 | { \ |
ee959b00 | 977 | struct scsi_target *starget = transport_class_to_starget(dev); \ |
1da177e4 LT |
978 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \ |
979 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
980 | struct fc_rport *rport = starget_to_rport(starget); \ | |
981 | if (rport) \ | |
982 | fc_starget_##field(starget) = rport->field; \ | |
983 | else if (i->f->get_starget_##field) \ | |
984 | i->f->get_starget_##field(starget); \ | |
985 | return snprintf(buf, sz, format_string, \ | |
986 | cast fc_starget_##field(starget)); \ | |
987 | } | |
988 | ||
989 | #define fc_starget_rd_attr(field, format_string, sz) \ | |
990 | fc_starget_show_function(field, format_string, sz, ) \ | |
ee959b00 | 991 | static FC_DEVICE_ATTR(starget, field, S_IRUGO, \ |
1da177e4 LT |
992 | show_fc_starget_##field, NULL) |
993 | ||
994 | #define fc_starget_rd_attr_cast(field, format_string, sz, cast) \ | |
995 | fc_starget_show_function(field, format_string, sz, (cast)) \ | |
ee959b00 | 996 | static FC_DEVICE_ATTR(starget, field, S_IRUGO, \ |
1da177e4 LT |
997 | show_fc_starget_##field, NULL) |
998 | ||
999 | #define SETUP_STARGET_ATTRIBUTE_RD(field) \ | |
ee959b00 | 1000 | i->private_starget_attrs[count] = device_attr_starget_##field; \ |
1da177e4 LT |
1001 | i->private_starget_attrs[count].attr.mode = S_IRUGO; \ |
1002 | i->private_starget_attrs[count].store = NULL; \ | |
1003 | i->starget_attrs[count] = &i->private_starget_attrs[count]; \ | |
1004 | if (i->f->show_starget_##field) \ | |
1005 | count++ | |
1006 | ||
1007 | #define SETUP_STARGET_ATTRIBUTE_RW(field) \ | |
ee959b00 | 1008 | i->private_starget_attrs[count] = device_attr_starget_##field; \ |
1da177e4 LT |
1009 | if (!i->f->set_starget_##field) { \ |
1010 | i->private_starget_attrs[count].attr.mode = S_IRUGO; \ | |
1011 | i->private_starget_attrs[count].store = NULL; \ | |
1012 | } \ | |
1013 | i->starget_attrs[count] = &i->private_starget_attrs[count]; \ | |
1014 | if (i->f->show_starget_##field) \ | |
1015 | count++ | |
1016 | ||
1017 | /* The FC Transport SCSI Target Attributes: */ | |
1018 | fc_starget_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); | |
1019 | fc_starget_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); | |
1020 | fc_starget_rd_attr(port_id, "0x%06x\n", 20); | |
1021 | ||
1022 | ||
a53eb5e0 JS |
1023 | /* |
1024 | * FC Virtual Port Attribute Management | |
1025 | */ | |
1026 | ||
1027 | #define fc_vport_show_function(field, format_string, sz, cast) \ | |
1028 | static ssize_t \ | |
ee959b00 TJ |
1029 | show_fc_vport_##field (struct device *dev, \ |
1030 | struct device_attribute *attr, char *buf) \ | |
a53eb5e0 | 1031 | { \ |
ee959b00 | 1032 | struct fc_vport *vport = transport_class_to_vport(dev); \ |
a53eb5e0 JS |
1033 | struct Scsi_Host *shost = vport_to_shost(vport); \ |
1034 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
1035 | if ((i->f->get_vport_##field) && \ | |
1036 | !(vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))) \ | |
1037 | i->f->get_vport_##field(vport); \ | |
1038 | return snprintf(buf, sz, format_string, cast vport->field); \ | |
1039 | } | |
1040 | ||
1041 | #define fc_vport_store_function(field) \ | |
1042 | static ssize_t \ | |
ee959b00 TJ |
1043 | store_fc_vport_##field(struct device *dev, \ |
1044 | struct device_attribute *attr, \ | |
1045 | const char *buf, size_t count) \ | |
a53eb5e0 JS |
1046 | { \ |
1047 | int val; \ | |
ee959b00 | 1048 | struct fc_vport *vport = transport_class_to_vport(dev); \ |
a53eb5e0 JS |
1049 | struct Scsi_Host *shost = vport_to_shost(vport); \ |
1050 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
1051 | char *cp; \ | |
1052 | if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \ | |
1053 | return -EBUSY; \ | |
1054 | val = simple_strtoul(buf, &cp, 0); \ | |
1055 | if (*cp && (*cp != '\n')) \ | |
1056 | return -EINVAL; \ | |
1057 | i->f->set_vport_##field(vport, val); \ | |
1058 | return count; \ | |
1059 | } | |
1060 | ||
1061 | #define fc_vport_store_str_function(field, slen) \ | |
1062 | static ssize_t \ | |
ee959b00 TJ |
1063 | store_fc_vport_##field(struct device *dev, \ |
1064 | struct device_attribute *attr, \ | |
1065 | const char *buf, size_t count) \ | |
a53eb5e0 | 1066 | { \ |
ee959b00 | 1067 | struct fc_vport *vport = transport_class_to_vport(dev); \ |
a53eb5e0 JS |
1068 | struct Scsi_Host *shost = vport_to_shost(vport); \ |
1069 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
1070 | unsigned int cnt=count; \ | |
1071 | \ | |
1072 | /* count may include a LF at end of string */ \ | |
1073 | if (buf[cnt-1] == '\n') \ | |
1074 | cnt--; \ | |
1075 | if (cnt > ((slen) - 1)) \ | |
1076 | return -EINVAL; \ | |
1077 | memcpy(vport->field, buf, cnt); \ | |
1078 | i->f->set_vport_##field(vport); \ | |
1079 | return count; \ | |
1080 | } | |
1081 | ||
1082 | #define fc_vport_rd_attr(field, format_string, sz) \ | |
1083 | fc_vport_show_function(field, format_string, sz, ) \ | |
ee959b00 | 1084 | static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ |
a53eb5e0 JS |
1085 | show_fc_vport_##field, NULL) |
1086 | ||
1087 | #define fc_vport_rd_attr_cast(field, format_string, sz, cast) \ | |
1088 | fc_vport_show_function(field, format_string, sz, (cast)) \ | |
ee959b00 | 1089 | static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ |
a53eb5e0 JS |
1090 | show_fc_vport_##field, NULL) |
1091 | ||
1092 | #define fc_vport_rw_attr(field, format_string, sz) \ | |
1093 | fc_vport_show_function(field, format_string, sz, ) \ | |
1094 | fc_vport_store_function(field) \ | |
ee959b00 | 1095 | static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \ |
a53eb5e0 JS |
1096 | show_fc_vport_##field, \ |
1097 | store_fc_vport_##field) | |
1098 | ||
1099 | #define fc_private_vport_show_function(field, format_string, sz, cast) \ | |
1100 | static ssize_t \ | |
ee959b00 TJ |
1101 | show_fc_vport_##field (struct device *dev, \ |
1102 | struct device_attribute *attr, char *buf) \ | |
a53eb5e0 | 1103 | { \ |
ee959b00 | 1104 | struct fc_vport *vport = transport_class_to_vport(dev); \ |
a53eb5e0 JS |
1105 | return snprintf(buf, sz, format_string, cast vport->field); \ |
1106 | } | |
1107 | ||
1108 | #define fc_private_vport_store_u32_function(field) \ | |
1109 | static ssize_t \ | |
ee959b00 TJ |
1110 | store_fc_vport_##field(struct device *dev, \ |
1111 | struct device_attribute *attr, \ | |
1112 | const char *buf, size_t count) \ | |
a53eb5e0 JS |
1113 | { \ |
1114 | u32 val; \ | |
ee959b00 | 1115 | struct fc_vport *vport = transport_class_to_vport(dev); \ |
a53eb5e0 JS |
1116 | char *cp; \ |
1117 | if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \ | |
1118 | return -EBUSY; \ | |
1119 | val = simple_strtoul(buf, &cp, 0); \ | |
1120 | if (*cp && (*cp != '\n')) \ | |
1121 | return -EINVAL; \ | |
1122 | vport->field = val; \ | |
1123 | return count; \ | |
1124 | } | |
1125 | ||
1126 | ||
1127 | #define fc_private_vport_rd_attr(field, format_string, sz) \ | |
1128 | fc_private_vport_show_function(field, format_string, sz, ) \ | |
ee959b00 | 1129 | static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ |
a53eb5e0 JS |
1130 | show_fc_vport_##field, NULL) |
1131 | ||
1132 | #define fc_private_vport_rd_attr_cast(field, format_string, sz, cast) \ | |
1133 | fc_private_vport_show_function(field, format_string, sz, (cast)) \ | |
ee959b00 | 1134 | static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ |
a53eb5e0 JS |
1135 | show_fc_vport_##field, NULL) |
1136 | ||
1137 | #define fc_private_vport_rw_u32_attr(field, format_string, sz) \ | |
1138 | fc_private_vport_show_function(field, format_string, sz, ) \ | |
1139 | fc_private_vport_store_u32_function(field) \ | |
ee959b00 | 1140 | static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \ |
a53eb5e0 JS |
1141 | show_fc_vport_##field, \ |
1142 | store_fc_vport_##field) | |
1143 | ||
1144 | ||
1145 | #define fc_private_vport_rd_enum_attr(title, maxlen) \ | |
1146 | static ssize_t \ | |
ee959b00 TJ |
1147 | show_fc_vport_##title (struct device *dev, \ |
1148 | struct device_attribute *attr, \ | |
1149 | char *buf) \ | |
a53eb5e0 | 1150 | { \ |
ee959b00 | 1151 | struct fc_vport *vport = transport_class_to_vport(dev); \ |
a53eb5e0 JS |
1152 | const char *name; \ |
1153 | name = get_fc_##title##_name(vport->title); \ | |
1154 | if (!name) \ | |
1155 | return -EINVAL; \ | |
1156 | return snprintf(buf, maxlen, "%s\n", name); \ | |
1157 | } \ | |
ee959b00 | 1158 | static FC_DEVICE_ATTR(vport, title, S_IRUGO, \ |
a53eb5e0 JS |
1159 | show_fc_vport_##title, NULL) |
1160 | ||
1161 | ||
1162 | #define SETUP_VPORT_ATTRIBUTE_RD(field) \ | |
ee959b00 | 1163 | i->private_vport_attrs[count] = device_attr_vport_##field; \ |
a53eb5e0 JS |
1164 | i->private_vport_attrs[count].attr.mode = S_IRUGO; \ |
1165 | i->private_vport_attrs[count].store = NULL; \ | |
1166 | i->vport_attrs[count] = &i->private_vport_attrs[count]; \ | |
1167 | if (i->f->get_##field) \ | |
1168 | count++ | |
1169 | /* NOTE: Above MACRO differs: checks function not show bit */ | |
1170 | ||
1171 | #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(field) \ | |
ee959b00 | 1172 | i->private_vport_attrs[count] = device_attr_vport_##field; \ |
a53eb5e0 JS |
1173 | i->private_vport_attrs[count].attr.mode = S_IRUGO; \ |
1174 | i->private_vport_attrs[count].store = NULL; \ | |
1175 | i->vport_attrs[count] = &i->private_vport_attrs[count]; \ | |
1176 | count++ | |
1177 | ||
1178 | #define SETUP_VPORT_ATTRIBUTE_WR(field) \ | |
ee959b00 | 1179 | i->private_vport_attrs[count] = device_attr_vport_##field; \ |
a53eb5e0 JS |
1180 | i->vport_attrs[count] = &i->private_vport_attrs[count]; \ |
1181 | if (i->f->field) \ | |
1182 | count++ | |
1183 | /* NOTE: Above MACRO differs: checks function */ | |
1184 | ||
1185 | #define SETUP_VPORT_ATTRIBUTE_RW(field) \ | |
ee959b00 | 1186 | i->private_vport_attrs[count] = device_attr_vport_##field; \ |
a53eb5e0 JS |
1187 | if (!i->f->set_vport_##field) { \ |
1188 | i->private_vport_attrs[count].attr.mode = S_IRUGO; \ | |
1189 | i->private_vport_attrs[count].store = NULL; \ | |
1190 | } \ | |
1191 | i->vport_attrs[count] = &i->private_vport_attrs[count]; \ | |
1192 | count++ | |
1193 | /* NOTE: Above MACRO differs: does not check show bit */ | |
1194 | ||
1195 | #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RW(field) \ | |
1196 | { \ | |
ee959b00 | 1197 | i->private_vport_attrs[count] = device_attr_vport_##field; \ |
a53eb5e0 JS |
1198 | i->vport_attrs[count] = &i->private_vport_attrs[count]; \ |
1199 | count++; \ | |
1200 | } | |
1201 | ||
1202 | ||
1203 | /* The FC Transport Virtual Port Attributes: */ | |
1204 | ||
1205 | /* Fixed Virtual Port Attributes */ | |
1206 | ||
1207 | /* Dynamic Virtual Port Attributes */ | |
1208 | ||
1209 | /* Private Virtual Port Attributes */ | |
1210 | ||
1211 | fc_private_vport_rd_enum_attr(vport_state, FC_VPORTSTATE_MAX_NAMELEN); | |
1212 | fc_private_vport_rd_enum_attr(vport_last_state, FC_VPORTSTATE_MAX_NAMELEN); | |
1213 | fc_private_vport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); | |
1214 | fc_private_vport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); | |
1215 | ||
1216 | static ssize_t | |
ee959b00 TJ |
1217 | show_fc_vport_roles (struct device *dev, struct device_attribute *attr, |
1218 | char *buf) | |
a53eb5e0 | 1219 | { |
ee959b00 | 1220 | struct fc_vport *vport = transport_class_to_vport(dev); |
a53eb5e0 JS |
1221 | |
1222 | if (vport->roles == FC_PORT_ROLE_UNKNOWN) | |
1223 | return snprintf(buf, 20, "unknown\n"); | |
1224 | return get_fc_port_roles_names(vport->roles, buf); | |
1225 | } | |
ee959b00 | 1226 | static FC_DEVICE_ATTR(vport, roles, S_IRUGO, show_fc_vport_roles, NULL); |
a53eb5e0 JS |
1227 | |
1228 | fc_private_vport_rd_enum_attr(vport_type, FC_PORTTYPE_MAX_NAMELEN); | |
1229 | ||
1230 | fc_private_vport_show_function(symbolic_name, "%s\n", | |
1231 | FC_VPORT_SYMBOLIC_NAMELEN + 1, ) | |
1232 | fc_vport_store_str_function(symbolic_name, FC_VPORT_SYMBOLIC_NAMELEN) | |
ee959b00 | 1233 | static FC_DEVICE_ATTR(vport, symbolic_name, S_IRUGO | S_IWUSR, |
a53eb5e0 JS |
1234 | show_fc_vport_symbolic_name, store_fc_vport_symbolic_name); |
1235 | ||
1236 | static ssize_t | |
ee959b00 TJ |
1237 | store_fc_vport_delete(struct device *dev, struct device_attribute *attr, |
1238 | const char *buf, size_t count) | |
a53eb5e0 | 1239 | { |
ee959b00 | 1240 | struct fc_vport *vport = transport_class_to_vport(dev); |
9ef3e4a4 | 1241 | struct Scsi_Host *shost = vport_to_shost(vport); |
0d9dc7c8 GR |
1242 | unsigned long flags; |
1243 | ||
1244 | spin_lock_irqsave(shost->host_lock, flags); | |
1245 | if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) { | |
1246 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1247 | return -EBUSY; | |
1248 | } | |
1249 | vport->flags |= FC_VPORT_DELETING; | |
1250 | spin_unlock_irqrestore(shost->host_lock, flags); | |
a53eb5e0 | 1251 | |
9ef3e4a4 | 1252 | fc_queue_work(shost, &vport->vport_delete_work); |
a53eb5e0 JS |
1253 | return count; |
1254 | } | |
ee959b00 | 1255 | static FC_DEVICE_ATTR(vport, vport_delete, S_IWUSR, |
a53eb5e0 JS |
1256 | NULL, store_fc_vport_delete); |
1257 | ||
1258 | ||
1259 | /* | |
1260 | * Enable/Disable vport | |
1261 | * Write "1" to disable, write "0" to enable | |
1262 | */ | |
1263 | static ssize_t | |
ee959b00 TJ |
1264 | store_fc_vport_disable(struct device *dev, struct device_attribute *attr, |
1265 | const char *buf, | |
a53eb5e0 JS |
1266 | size_t count) |
1267 | { | |
ee959b00 | 1268 | struct fc_vport *vport = transport_class_to_vport(dev); |
a53eb5e0 JS |
1269 | struct Scsi_Host *shost = vport_to_shost(vport); |
1270 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
1271 | int stat; | |
1272 | ||
1273 | if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) | |
1274 | return -EBUSY; | |
1275 | ||
1276 | if (*buf == '0') { | |
1277 | if (vport->vport_state != FC_VPORT_DISABLED) | |
1278 | return -EALREADY; | |
1279 | } else if (*buf == '1') { | |
1280 | if (vport->vport_state == FC_VPORT_DISABLED) | |
1281 | return -EALREADY; | |
1282 | } else | |
1283 | return -EINVAL; | |
1284 | ||
1285 | stat = i->f->vport_disable(vport, ((*buf == '0') ? false : true)); | |
1286 | return stat ? stat : count; | |
1287 | } | |
ee959b00 | 1288 | static FC_DEVICE_ATTR(vport, vport_disable, S_IWUSR, |
a53eb5e0 JS |
1289 | NULL, store_fc_vport_disable); |
1290 | ||
1291 | ||
1da177e4 LT |
1292 | /* |
1293 | * Host Attribute Management | |
1294 | */ | |
1295 | ||
1296 | #define fc_host_show_function(field, format_string, sz, cast) \ | |
1297 | static ssize_t \ | |
ee959b00 TJ |
1298 | show_fc_host_##field (struct device *dev, \ |
1299 | struct device_attribute *attr, char *buf) \ | |
1da177e4 | 1300 | { \ |
ee959b00 | 1301 | struct Scsi_Host *shost = transport_class_to_shost(dev); \ |
1da177e4 LT |
1302 | struct fc_internal *i = to_fc_internal(shost->transportt); \ |
1303 | if (i->f->get_host_##field) \ | |
1304 | i->f->get_host_##field(shost); \ | |
1305 | return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \ | |
1306 | } | |
1307 | ||
1308 | #define fc_host_store_function(field) \ | |
1309 | static ssize_t \ | |
ee959b00 TJ |
1310 | store_fc_host_##field(struct device *dev, \ |
1311 | struct device_attribute *attr, \ | |
1312 | const char *buf, size_t count) \ | |
1da177e4 LT |
1313 | { \ |
1314 | int val; \ | |
ee959b00 | 1315 | struct Scsi_Host *shost = transport_class_to_shost(dev); \ |
1da177e4 | 1316 | struct fc_internal *i = to_fc_internal(shost->transportt); \ |
0f29b966 | 1317 | char *cp; \ |
1da177e4 | 1318 | \ |
0f29b966 JS |
1319 | val = simple_strtoul(buf, &cp, 0); \ |
1320 | if (*cp && (*cp != '\n')) \ | |
1321 | return -EINVAL; \ | |
1da177e4 LT |
1322 | i->f->set_host_##field(shost, val); \ |
1323 | return count; \ | |
1324 | } | |
1325 | ||
b8d08210 JS |
1326 | #define fc_host_store_str_function(field, slen) \ |
1327 | static ssize_t \ | |
ee959b00 TJ |
1328 | store_fc_host_##field(struct device *dev, \ |
1329 | struct device_attribute *attr, \ | |
1330 | const char *buf, size_t count) \ | |
b8d08210 | 1331 | { \ |
ee959b00 | 1332 | struct Scsi_Host *shost = transport_class_to_shost(dev); \ |
b8d08210 JS |
1333 | struct fc_internal *i = to_fc_internal(shost->transportt); \ |
1334 | unsigned int cnt=count; \ | |
1335 | \ | |
1336 | /* count may include a LF at end of string */ \ | |
1337 | if (buf[cnt-1] == '\n') \ | |
1338 | cnt--; \ | |
1339 | if (cnt > ((slen) - 1)) \ | |
1340 | return -EINVAL; \ | |
1341 | memcpy(fc_host_##field(shost), buf, cnt); \ | |
1342 | i->f->set_host_##field(shost); \ | |
1343 | return count; \ | |
1344 | } | |
1345 | ||
1da177e4 LT |
1346 | #define fc_host_rd_attr(field, format_string, sz) \ |
1347 | fc_host_show_function(field, format_string, sz, ) \ | |
ee959b00 | 1348 | static FC_DEVICE_ATTR(host, field, S_IRUGO, \ |
1da177e4 LT |
1349 | show_fc_host_##field, NULL) |
1350 | ||
1351 | #define fc_host_rd_attr_cast(field, format_string, sz, cast) \ | |
1352 | fc_host_show_function(field, format_string, sz, (cast)) \ | |
ee959b00 | 1353 | static FC_DEVICE_ATTR(host, field, S_IRUGO, \ |
1da177e4 LT |
1354 | show_fc_host_##field, NULL) |
1355 | ||
1356 | #define fc_host_rw_attr(field, format_string, sz) \ | |
1357 | fc_host_show_function(field, format_string, sz, ) \ | |
1358 | fc_host_store_function(field) \ | |
ee959b00 | 1359 | static FC_DEVICE_ATTR(host, field, S_IRUGO | S_IWUSR, \ |
1da177e4 LT |
1360 | show_fc_host_##field, \ |
1361 | store_fc_host_##field) | |
1362 | ||
1363 | #define fc_host_rd_enum_attr(title, maxlen) \ | |
1364 | static ssize_t \ | |
ee959b00 TJ |
1365 | show_fc_host_##title (struct device *dev, \ |
1366 | struct device_attribute *attr, char *buf) \ | |
1da177e4 | 1367 | { \ |
ee959b00 | 1368 | struct Scsi_Host *shost = transport_class_to_shost(dev); \ |
1da177e4 LT |
1369 | struct fc_internal *i = to_fc_internal(shost->transportt); \ |
1370 | const char *name; \ | |
1371 | if (i->f->get_host_##title) \ | |
1372 | i->f->get_host_##title(shost); \ | |
1373 | name = get_fc_##title##_name(fc_host_##title(shost)); \ | |
1374 | if (!name) \ | |
1375 | return -EINVAL; \ | |
1376 | return snprintf(buf, maxlen, "%s\n", name); \ | |
1377 | } \ | |
ee959b00 | 1378 | static FC_DEVICE_ATTR(host, title, S_IRUGO, show_fc_host_##title, NULL) |
1da177e4 LT |
1379 | |
1380 | #define SETUP_HOST_ATTRIBUTE_RD(field) \ | |
ee959b00 | 1381 | i->private_host_attrs[count] = device_attr_host_##field; \ |
1da177e4 LT |
1382 | i->private_host_attrs[count].attr.mode = S_IRUGO; \ |
1383 | i->private_host_attrs[count].store = NULL; \ | |
1384 | i->host_attrs[count] = &i->private_host_attrs[count]; \ | |
1385 | if (i->f->show_host_##field) \ | |
1386 | count++ | |
1387 | ||
a53eb5e0 | 1388 | #define SETUP_HOST_ATTRIBUTE_RD_NS(field) \ |
ee959b00 | 1389 | i->private_host_attrs[count] = device_attr_host_##field; \ |
a53eb5e0 JS |
1390 | i->private_host_attrs[count].attr.mode = S_IRUGO; \ |
1391 | i->private_host_attrs[count].store = NULL; \ | |
1392 | i->host_attrs[count] = &i->private_host_attrs[count]; \ | |
1393 | count++ | |
1394 | ||
1da177e4 | 1395 | #define SETUP_HOST_ATTRIBUTE_RW(field) \ |
ee959b00 | 1396 | i->private_host_attrs[count] = device_attr_host_##field; \ |
1da177e4 LT |
1397 | if (!i->f->set_host_##field) { \ |
1398 | i->private_host_attrs[count].attr.mode = S_IRUGO; \ | |
1399 | i->private_host_attrs[count].store = NULL; \ | |
1400 | } \ | |
1401 | i->host_attrs[count] = &i->private_host_attrs[count]; \ | |
1402 | if (i->f->show_host_##field) \ | |
1403 | count++ | |
1404 | ||
1405 | ||
1406 | #define fc_private_host_show_function(field, format_string, sz, cast) \ | |
1407 | static ssize_t \ | |
ee959b00 TJ |
1408 | show_fc_host_##field (struct device *dev, \ |
1409 | struct device_attribute *attr, char *buf) \ | |
1da177e4 | 1410 | { \ |
ee959b00 | 1411 | struct Scsi_Host *shost = transport_class_to_shost(dev); \ |
1da177e4 LT |
1412 | return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \ |
1413 | } | |
1414 | ||
1415 | #define fc_private_host_rd_attr(field, format_string, sz) \ | |
1416 | fc_private_host_show_function(field, format_string, sz, ) \ | |
ee959b00 | 1417 | static FC_DEVICE_ATTR(host, field, S_IRUGO, \ |
1da177e4 LT |
1418 | show_fc_host_##field, NULL) |
1419 | ||
1420 | #define fc_private_host_rd_attr_cast(field, format_string, sz, cast) \ | |
1421 | fc_private_host_show_function(field, format_string, sz, (cast)) \ | |
ee959b00 | 1422 | static FC_DEVICE_ATTR(host, field, S_IRUGO, \ |
1da177e4 LT |
1423 | show_fc_host_##field, NULL) |
1424 | ||
1425 | #define SETUP_PRIVATE_HOST_ATTRIBUTE_RD(field) \ | |
ee959b00 | 1426 | i->private_host_attrs[count] = device_attr_host_##field; \ |
1da177e4 LT |
1427 | i->private_host_attrs[count].attr.mode = S_IRUGO; \ |
1428 | i->private_host_attrs[count].store = NULL; \ | |
1429 | i->host_attrs[count] = &i->private_host_attrs[count]; \ | |
1430 | count++ | |
1431 | ||
1432 | #define SETUP_PRIVATE_HOST_ATTRIBUTE_RW(field) \ | |
91ca7b01 | 1433 | { \ |
ee959b00 | 1434 | i->private_host_attrs[count] = device_attr_host_##field; \ |
1da177e4 | 1435 | i->host_attrs[count] = &i->private_host_attrs[count]; \ |
91ca7b01 AV |
1436 | count++; \ |
1437 | } | |
1da177e4 LT |
1438 | |
1439 | ||
1440 | /* Fixed Host Attributes */ | |
1441 | ||
1442 | static ssize_t | |
ee959b00 TJ |
1443 | show_fc_host_supported_classes (struct device *dev, |
1444 | struct device_attribute *attr, char *buf) | |
1da177e4 | 1445 | { |
ee959b00 | 1446 | struct Scsi_Host *shost = transport_class_to_shost(dev); |
1da177e4 LT |
1447 | |
1448 | if (fc_host_supported_classes(shost) == FC_COS_UNSPECIFIED) | |
1449 | return snprintf(buf, 20, "unspecified\n"); | |
1450 | ||
1451 | return get_fc_cos_names(fc_host_supported_classes(shost), buf); | |
1452 | } | |
ee959b00 | 1453 | static FC_DEVICE_ATTR(host, supported_classes, S_IRUGO, |
1da177e4 LT |
1454 | show_fc_host_supported_classes, NULL); |
1455 | ||
1456 | static ssize_t | |
ee959b00 TJ |
1457 | show_fc_host_supported_fc4s (struct device *dev, |
1458 | struct device_attribute *attr, char *buf) | |
1da177e4 | 1459 | { |
ee959b00 | 1460 | struct Scsi_Host *shost = transport_class_to_shost(dev); |
1da177e4 LT |
1461 | return (ssize_t)show_fc_fc4s(buf, fc_host_supported_fc4s(shost)); |
1462 | } | |
ee959b00 | 1463 | static FC_DEVICE_ATTR(host, supported_fc4s, S_IRUGO, |
1da177e4 LT |
1464 | show_fc_host_supported_fc4s, NULL); |
1465 | ||
1466 | static ssize_t | |
ee959b00 TJ |
1467 | show_fc_host_supported_speeds (struct device *dev, |
1468 | struct device_attribute *attr, char *buf) | |
1da177e4 | 1469 | { |
ee959b00 | 1470 | struct Scsi_Host *shost = transport_class_to_shost(dev); |
1da177e4 LT |
1471 | |
1472 | if (fc_host_supported_speeds(shost) == FC_PORTSPEED_UNKNOWN) | |
1473 | return snprintf(buf, 20, "unknown\n"); | |
1474 | ||
1475 | return get_fc_port_speed_names(fc_host_supported_speeds(shost), buf); | |
1476 | } | |
ee959b00 | 1477 | static FC_DEVICE_ATTR(host, supported_speeds, S_IRUGO, |
1da177e4 LT |
1478 | show_fc_host_supported_speeds, NULL); |
1479 | ||
1480 | ||
1481 | fc_private_host_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); | |
1482 | fc_private_host_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); | |
6b7281d0 AH |
1483 | fc_private_host_rd_attr_cast(permanent_port_name, "0x%llx\n", 20, |
1484 | unsigned long long); | |
1da177e4 | 1485 | fc_private_host_rd_attr(maxframe_size, "%u bytes\n", 20); |
a53eb5e0 | 1486 | fc_private_host_rd_attr(max_npiv_vports, "%u\n", 20); |
1da177e4 LT |
1487 | fc_private_host_rd_attr(serial_number, "%s\n", (FC_SERIAL_NUMBER_SIZE +1)); |
1488 | ||
1489 | ||
1490 | /* Dynamic Host Attributes */ | |
1491 | ||
1492 | static ssize_t | |
ee959b00 TJ |
1493 | show_fc_host_active_fc4s (struct device *dev, |
1494 | struct device_attribute *attr, char *buf) | |
1da177e4 | 1495 | { |
ee959b00 | 1496 | struct Scsi_Host *shost = transport_class_to_shost(dev); |
1da177e4 LT |
1497 | struct fc_internal *i = to_fc_internal(shost->transportt); |
1498 | ||
1499 | if (i->f->get_host_active_fc4s) | |
1500 | i->f->get_host_active_fc4s(shost); | |
1501 | ||
1502 | return (ssize_t)show_fc_fc4s(buf, fc_host_active_fc4s(shost)); | |
1503 | } | |
ee959b00 | 1504 | static FC_DEVICE_ATTR(host, active_fc4s, S_IRUGO, |
1da177e4 LT |
1505 | show_fc_host_active_fc4s, NULL); |
1506 | ||
1507 | static ssize_t | |
ee959b00 TJ |
1508 | show_fc_host_speed (struct device *dev, |
1509 | struct device_attribute *attr, char *buf) | |
1da177e4 | 1510 | { |
ee959b00 | 1511 | struct Scsi_Host *shost = transport_class_to_shost(dev); |
1da177e4 LT |
1512 | struct fc_internal *i = to_fc_internal(shost->transportt); |
1513 | ||
1514 | if (i->f->get_host_speed) | |
1515 | i->f->get_host_speed(shost); | |
1516 | ||
1517 | if (fc_host_speed(shost) == FC_PORTSPEED_UNKNOWN) | |
1518 | return snprintf(buf, 20, "unknown\n"); | |
1519 | ||
1520 | return get_fc_port_speed_names(fc_host_speed(shost), buf); | |
1521 | } | |
ee959b00 | 1522 | static FC_DEVICE_ATTR(host, speed, S_IRUGO, |
1da177e4 LT |
1523 | show_fc_host_speed, NULL); |
1524 | ||
1525 | ||
1526 | fc_host_rd_attr(port_id, "0x%06x\n", 20); | |
1527 | fc_host_rd_enum_attr(port_type, FC_PORTTYPE_MAX_NAMELEN); | |
1528 | fc_host_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN); | |
1529 | fc_host_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long); | |
016131b8 | 1530 | fc_host_rd_attr(symbolic_name, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1); |
1da177e4 | 1531 | |
b8d08210 JS |
1532 | fc_private_host_show_function(system_hostname, "%s\n", |
1533 | FC_SYMBOLIC_NAME_SIZE + 1, ) | |
1534 | fc_host_store_str_function(system_hostname, FC_SYMBOLIC_NAME_SIZE) | |
ee959b00 | 1535 | static FC_DEVICE_ATTR(host, system_hostname, S_IRUGO | S_IWUSR, |
b8d08210 JS |
1536 | show_fc_host_system_hostname, store_fc_host_system_hostname); |
1537 | ||
1da177e4 LT |
1538 | |
1539 | /* Private Host Attributes */ | |
1540 | ||
1541 | static ssize_t | |
ee959b00 TJ |
1542 | show_fc_private_host_tgtid_bind_type(struct device *dev, |
1543 | struct device_attribute *attr, char *buf) | |
1da177e4 | 1544 | { |
ee959b00 | 1545 | struct Scsi_Host *shost = transport_class_to_shost(dev); |
1da177e4 LT |
1546 | const char *name; |
1547 | ||
1548 | name = get_fc_tgtid_bind_type_name(fc_host_tgtid_bind_type(shost)); | |
1549 | if (!name) | |
1550 | return -EINVAL; | |
1551 | return snprintf(buf, FC_BINDTYPE_MAX_NAMELEN, "%s\n", name); | |
1552 | } | |
1553 | ||
d16794f6 JSEC |
1554 | #define get_list_head_entry(pos, head, member) \ |
1555 | pos = list_entry((head)->next, typeof(*pos), member) | |
1556 | ||
1da177e4 | 1557 | static ssize_t |
ee959b00 TJ |
1558 | store_fc_private_host_tgtid_bind_type(struct device *dev, |
1559 | struct device_attribute *attr, const char *buf, size_t count) | |
1da177e4 | 1560 | { |
ee959b00 | 1561 | struct Scsi_Host *shost = transport_class_to_shost(dev); |
d16794f6 | 1562 | struct fc_rport *rport; |
1da177e4 LT |
1563 | enum fc_tgtid_binding_type val; |
1564 | unsigned long flags; | |
1565 | ||
1566 | if (get_fc_tgtid_bind_type_match(buf, &val)) | |
1567 | return -EINVAL; | |
1568 | ||
1569 | /* if changing bind type, purge all unused consistent bindings */ | |
1570 | if (val != fc_host_tgtid_bind_type(shost)) { | |
1571 | spin_lock_irqsave(shost->host_lock, flags); | |
d16794f6 JSEC |
1572 | while (!list_empty(&fc_host_rport_bindings(shost))) { |
1573 | get_list_head_entry(rport, | |
1574 | &fc_host_rport_bindings(shost), peers); | |
aedf3497 JS |
1575 | list_del(&rport->peers); |
1576 | rport->port_state = FC_PORTSTATE_DELETED; | |
1577 | fc_queue_work(shost, &rport->rport_delete_work); | |
d16794f6 | 1578 | } |
1da177e4 LT |
1579 | spin_unlock_irqrestore(shost->host_lock, flags); |
1580 | } | |
1581 | ||
1582 | fc_host_tgtid_bind_type(shost) = val; | |
1583 | return count; | |
1584 | } | |
1585 | ||
ee959b00 | 1586 | static FC_DEVICE_ATTR(host, tgtid_bind_type, S_IRUGO | S_IWUSR, |
1da177e4 LT |
1587 | show_fc_private_host_tgtid_bind_type, |
1588 | store_fc_private_host_tgtid_bind_type); | |
1589 | ||
91ca7b01 | 1590 | static ssize_t |
ee959b00 TJ |
1591 | store_fc_private_host_issue_lip(struct device *dev, |
1592 | struct device_attribute *attr, const char *buf, size_t count) | |
91ca7b01 | 1593 | { |
ee959b00 | 1594 | struct Scsi_Host *shost = transport_class_to_shost(dev); |
91ca7b01 AV |
1595 | struct fc_internal *i = to_fc_internal(shost->transportt); |
1596 | int ret; | |
1597 | ||
1598 | /* ignore any data value written to the attribute */ | |
1599 | if (i->f->issue_fc_host_lip) { | |
1600 | ret = i->f->issue_fc_host_lip(shost); | |
1601 | return ret ? ret: count; | |
1602 | } | |
1603 | ||
1604 | return -ENOENT; | |
1605 | } | |
1606 | ||
ee959b00 | 1607 | static FC_DEVICE_ATTR(host, issue_lip, S_IWUSR, NULL, |
91ca7b01 AV |
1608 | store_fc_private_host_issue_lip); |
1609 | ||
a53eb5e0 JS |
1610 | fc_private_host_rd_attr(npiv_vports_inuse, "%u\n", 20); |
1611 | ||
1612 | ||
1da177e4 LT |
1613 | /* |
1614 | * Host Statistics Management | |
1615 | */ | |
1616 | ||
1617 | /* Show a given an attribute in the statistics group */ | |
1618 | static ssize_t | |
ee959b00 | 1619 | fc_stat_show(const struct device *dev, char *buf, unsigned long offset) |
1da177e4 | 1620 | { |
ee959b00 | 1621 | struct Scsi_Host *shost = transport_class_to_shost(dev); |
1da177e4 LT |
1622 | struct fc_internal *i = to_fc_internal(shost->transportt); |
1623 | struct fc_host_statistics *stats; | |
1624 | ssize_t ret = -ENOENT; | |
1625 | ||
1626 | if (offset > sizeof(struct fc_host_statistics) || | |
1627 | offset % sizeof(u64) != 0) | |
1628 | WARN_ON(1); | |
1629 | ||
1630 | if (i->f->get_fc_host_stats) { | |
1631 | stats = (i->f->get_fc_host_stats)(shost); | |
1632 | if (stats) | |
1633 | ret = snprintf(buf, 20, "0x%llx\n", | |
1634 | (unsigned long long)*(u64 *)(((u8 *) stats) + offset)); | |
1635 | } | |
1636 | return ret; | |
1637 | } | |
1638 | ||
1639 | ||
1640 | /* generate a read-only statistics attribute */ | |
1641 | #define fc_host_statistic(name) \ | |
ee959b00 TJ |
1642 | static ssize_t show_fcstat_##name(struct device *cd, \ |
1643 | struct device_attribute *attr, \ | |
1644 | char *buf) \ | |
1da177e4 LT |
1645 | { \ |
1646 | return fc_stat_show(cd, buf, \ | |
1647 | offsetof(struct fc_host_statistics, name)); \ | |
1648 | } \ | |
ee959b00 | 1649 | static FC_DEVICE_ATTR(host, name, S_IRUGO, show_fcstat_##name, NULL) |
1da177e4 LT |
1650 | |
1651 | fc_host_statistic(seconds_since_last_reset); | |
1652 | fc_host_statistic(tx_frames); | |
1653 | fc_host_statistic(tx_words); | |
1654 | fc_host_statistic(rx_frames); | |
1655 | fc_host_statistic(rx_words); | |
1656 | fc_host_statistic(lip_count); | |
1657 | fc_host_statistic(nos_count); | |
1658 | fc_host_statistic(error_frames); | |
1659 | fc_host_statistic(dumped_frames); | |
1660 | fc_host_statistic(link_failure_count); | |
1661 | fc_host_statistic(loss_of_sync_count); | |
1662 | fc_host_statistic(loss_of_signal_count); | |
1663 | fc_host_statistic(prim_seq_protocol_err_count); | |
1664 | fc_host_statistic(invalid_tx_word_count); | |
1665 | fc_host_statistic(invalid_crc_count); | |
1666 | fc_host_statistic(fcp_input_requests); | |
1667 | fc_host_statistic(fcp_output_requests); | |
1668 | fc_host_statistic(fcp_control_requests); | |
1669 | fc_host_statistic(fcp_input_megabytes); | |
1670 | fc_host_statistic(fcp_output_megabytes); | |
1671 | ||
1672 | static ssize_t | |
ee959b00 TJ |
1673 | fc_reset_statistics(struct device *dev, struct device_attribute *attr, |
1674 | const char *buf, size_t count) | |
1da177e4 | 1675 | { |
ee959b00 | 1676 | struct Scsi_Host *shost = transport_class_to_shost(dev); |
1da177e4 LT |
1677 | struct fc_internal *i = to_fc_internal(shost->transportt); |
1678 | ||
1679 | /* ignore any data value written to the attribute */ | |
1680 | if (i->f->reset_fc_host_stats) { | |
1681 | i->f->reset_fc_host_stats(shost); | |
1682 | return count; | |
1683 | } | |
1684 | ||
1685 | return -ENOENT; | |
1686 | } | |
ee959b00 | 1687 | static FC_DEVICE_ATTR(host, reset_statistics, S_IWUSR, NULL, |
1da177e4 LT |
1688 | fc_reset_statistics); |
1689 | ||
1da177e4 | 1690 | static struct attribute *fc_statistics_attrs[] = { |
ee959b00 TJ |
1691 | &device_attr_host_seconds_since_last_reset.attr, |
1692 | &device_attr_host_tx_frames.attr, | |
1693 | &device_attr_host_tx_words.attr, | |
1694 | &device_attr_host_rx_frames.attr, | |
1695 | &device_attr_host_rx_words.attr, | |
1696 | &device_attr_host_lip_count.attr, | |
1697 | &device_attr_host_nos_count.attr, | |
1698 | &device_attr_host_error_frames.attr, | |
1699 | &device_attr_host_dumped_frames.attr, | |
1700 | &device_attr_host_link_failure_count.attr, | |
1701 | &device_attr_host_loss_of_sync_count.attr, | |
1702 | &device_attr_host_loss_of_signal_count.attr, | |
1703 | &device_attr_host_prim_seq_protocol_err_count.attr, | |
1704 | &device_attr_host_invalid_tx_word_count.attr, | |
1705 | &device_attr_host_invalid_crc_count.attr, | |
1706 | &device_attr_host_fcp_input_requests.attr, | |
1707 | &device_attr_host_fcp_output_requests.attr, | |
1708 | &device_attr_host_fcp_control_requests.attr, | |
1709 | &device_attr_host_fcp_input_megabytes.attr, | |
1710 | &device_attr_host_fcp_output_megabytes.attr, | |
1711 | &device_attr_host_reset_statistics.attr, | |
1da177e4 LT |
1712 | NULL |
1713 | }; | |
1714 | ||
1715 | static struct attribute_group fc_statistics_group = { | |
1716 | .name = "statistics", | |
1717 | .attrs = fc_statistics_attrs, | |
1718 | }; | |
1719 | ||
a53eb5e0 JS |
1720 | |
1721 | /* Host Vport Attributes */ | |
1722 | ||
1723 | static int | |
1724 | fc_parse_wwn(const char *ns, u64 *nm) | |
1725 | { | |
1726 | unsigned int i, j; | |
1727 | u8 wwn[8]; | |
1728 | ||
1729 | memset(wwn, 0, sizeof(wwn)); | |
1730 | ||
1731 | /* Validate and store the new name */ | |
1732 | for (i=0, j=0; i < 16; i++) { | |
1733 | if ((*ns >= 'a') && (*ns <= 'f')) | |
1734 | j = ((j << 4) | ((*ns++ -'a') + 10)); | |
1735 | else if ((*ns >= 'A') && (*ns <= 'F')) | |
1736 | j = ((j << 4) | ((*ns++ -'A') + 10)); | |
1737 | else if ((*ns >= '0') && (*ns <= '9')) | |
1738 | j = ((j << 4) | (*ns++ -'0')); | |
1739 | else | |
1740 | return -EINVAL; | |
1741 | if (i % 2) { | |
1742 | wwn[i/2] = j & 0xff; | |
1743 | j = 0; | |
1744 | } | |
1745 | } | |
1746 | ||
1747 | *nm = wwn_to_u64(wwn); | |
1748 | ||
1749 | return 0; | |
1750 | } | |
1751 | ||
1752 | ||
1753 | /* | |
1754 | * "Short-cut" sysfs variable to create a new vport on a FC Host. | |
1755 | * Input is a string of the form "<WWPN>:<WWNN>". Other attributes | |
1756 | * will default to a NPIV-based FCP_Initiator; The WWNs are specified | |
1757 | * as hex characters, and may *not* contain any prefixes (e.g. 0x, x, etc) | |
1758 | */ | |
1759 | static ssize_t | |
ee959b00 TJ |
1760 | store_fc_host_vport_create(struct device *dev, struct device_attribute *attr, |
1761 | const char *buf, size_t count) | |
a53eb5e0 | 1762 | { |
ee959b00 | 1763 | struct Scsi_Host *shost = transport_class_to_shost(dev); |
a53eb5e0 JS |
1764 | struct fc_vport_identifiers vid; |
1765 | struct fc_vport *vport; | |
1766 | unsigned int cnt=count; | |
1767 | int stat; | |
1768 | ||
1769 | memset(&vid, 0, sizeof(vid)); | |
1770 | ||
1771 | /* count may include a LF at end of string */ | |
1772 | if (buf[cnt-1] == '\n') | |
1773 | cnt--; | |
1774 | ||
1775 | /* validate we have enough characters for WWPN */ | |
1776 | if ((cnt != (16+1+16)) || (buf[16] != ':')) | |
1777 | return -EINVAL; | |
1778 | ||
1779 | stat = fc_parse_wwn(&buf[0], &vid.port_name); | |
1780 | if (stat) | |
1781 | return stat; | |
1782 | ||
1783 | stat = fc_parse_wwn(&buf[17], &vid.node_name); | |
1784 | if (stat) | |
1785 | return stat; | |
1786 | ||
1787 | vid.roles = FC_PORT_ROLE_FCP_INITIATOR; | |
1788 | vid.vport_type = FC_PORTTYPE_NPIV; | |
1789 | /* vid.symbolic_name is already zero/NULL's */ | |
1790 | vid.disable = false; /* always enabled */ | |
1791 | ||
1792 | /* we only allow support on Channel 0 !!! */ | |
a30c3f69 | 1793 | stat = fc_vport_setup(shost, 0, &shost->shost_gendev, &vid, &vport); |
a53eb5e0 JS |
1794 | return stat ? stat : count; |
1795 | } | |
ee959b00 | 1796 | static FC_DEVICE_ATTR(host, vport_create, S_IWUSR, NULL, |
a53eb5e0 JS |
1797 | store_fc_host_vport_create); |
1798 | ||
1799 | ||
1800 | /* | |
1801 | * "Short-cut" sysfs variable to delete a vport on a FC Host. | |
1802 | * Vport is identified by a string containing "<WWPN>:<WWNN>". | |
1803 | * The WWNs are specified as hex characters, and may *not* contain | |
1804 | * any prefixes (e.g. 0x, x, etc) | |
1805 | */ | |
1806 | static ssize_t | |
ee959b00 TJ |
1807 | store_fc_host_vport_delete(struct device *dev, struct device_attribute *attr, |
1808 | const char *buf, size_t count) | |
a53eb5e0 | 1809 | { |
ee959b00 | 1810 | struct Scsi_Host *shost = transport_class_to_shost(dev); |
a53eb5e0 JS |
1811 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
1812 | struct fc_vport *vport; | |
1813 | u64 wwpn, wwnn; | |
1814 | unsigned long flags; | |
1815 | unsigned int cnt=count; | |
1816 | int stat, match; | |
1817 | ||
1818 | /* count may include a LF at end of string */ | |
1819 | if (buf[cnt-1] == '\n') | |
1820 | cnt--; | |
1821 | ||
1822 | /* validate we have enough characters for WWPN */ | |
1823 | if ((cnt != (16+1+16)) || (buf[16] != ':')) | |
1824 | return -EINVAL; | |
1825 | ||
1826 | stat = fc_parse_wwn(&buf[0], &wwpn); | |
1827 | if (stat) | |
1828 | return stat; | |
1829 | ||
1830 | stat = fc_parse_wwn(&buf[17], &wwnn); | |
1831 | if (stat) | |
1832 | return stat; | |
1833 | ||
1834 | spin_lock_irqsave(shost->host_lock, flags); | |
1835 | match = 0; | |
1836 | /* we only allow support on Channel 0 !!! */ | |
1837 | list_for_each_entry(vport, &fc_host->vports, peers) { | |
1838 | if ((vport->channel == 0) && | |
1839 | (vport->port_name == wwpn) && (vport->node_name == wwnn)) { | |
0d9dc7c8 GR |
1840 | if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) |
1841 | break; | |
1842 | vport->flags |= FC_VPORT_DELETING; | |
a53eb5e0 JS |
1843 | match = 1; |
1844 | break; | |
1845 | } | |
1846 | } | |
1847 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1848 | ||
1849 | if (!match) | |
1850 | return -ENODEV; | |
1851 | ||
1852 | stat = fc_vport_terminate(vport); | |
1853 | return stat ? stat : count; | |
1854 | } | |
ee959b00 | 1855 | static FC_DEVICE_ATTR(host, vport_delete, S_IWUSR, NULL, |
a53eb5e0 JS |
1856 | store_fc_host_vport_delete); |
1857 | ||
1858 | ||
1da177e4 LT |
1859 | static int fc_host_match(struct attribute_container *cont, |
1860 | struct device *dev) | |
1861 | { | |
1862 | struct Scsi_Host *shost; | |
1863 | struct fc_internal *i; | |
1864 | ||
1865 | if (!scsi_is_host_device(dev)) | |
1866 | return 0; | |
1867 | ||
1868 | shost = dev_to_shost(dev); | |
1869 | if (!shost->transportt || shost->transportt->host_attrs.ac.class | |
1870 | != &fc_host_class.class) | |
1871 | return 0; | |
1872 | ||
1873 | i = to_fc_internal(shost->transportt); | |
1874 | ||
1875 | return &i->t.host_attrs.ac == cont; | |
1876 | } | |
1877 | ||
1878 | static int fc_target_match(struct attribute_container *cont, | |
1879 | struct device *dev) | |
1880 | { | |
1881 | struct Scsi_Host *shost; | |
1882 | struct fc_internal *i; | |
1883 | ||
1884 | if (!scsi_is_target_device(dev)) | |
1885 | return 0; | |
1886 | ||
1887 | shost = dev_to_shost(dev->parent); | |
1888 | if (!shost->transportt || shost->transportt->host_attrs.ac.class | |
1889 | != &fc_host_class.class) | |
1890 | return 0; | |
1891 | ||
1892 | i = to_fc_internal(shost->transportt); | |
1893 | ||
1894 | return &i->t.target_attrs.ac == cont; | |
1895 | } | |
1896 | ||
1897 | static void fc_rport_dev_release(struct device *dev) | |
1898 | { | |
1899 | struct fc_rport *rport = dev_to_rport(dev); | |
1900 | put_device(dev->parent); | |
1901 | kfree(rport); | |
1902 | } | |
1903 | ||
1904 | int scsi_is_fc_rport(const struct device *dev) | |
1905 | { | |
1906 | return dev->release == fc_rport_dev_release; | |
1907 | } | |
1908 | EXPORT_SYMBOL(scsi_is_fc_rport); | |
1909 | ||
1910 | static int fc_rport_match(struct attribute_container *cont, | |
1911 | struct device *dev) | |
1912 | { | |
1913 | struct Scsi_Host *shost; | |
1914 | struct fc_internal *i; | |
1915 | ||
1916 | if (!scsi_is_fc_rport(dev)) | |
1917 | return 0; | |
1918 | ||
1919 | shost = dev_to_shost(dev->parent); | |
1920 | if (!shost->transportt || shost->transportt->host_attrs.ac.class | |
1921 | != &fc_host_class.class) | |
1922 | return 0; | |
1923 | ||
1924 | i = to_fc_internal(shost->transportt); | |
1925 | ||
1926 | return &i->rport_attr_cont.ac == cont; | |
1927 | } | |
1928 | ||
5c44cd2a | 1929 | |
a53eb5e0 JS |
1930 | static void fc_vport_dev_release(struct device *dev) |
1931 | { | |
1932 | struct fc_vport *vport = dev_to_vport(dev); | |
1933 | put_device(dev->parent); /* release kobj parent */ | |
1934 | kfree(vport); | |
1935 | } | |
1936 | ||
1937 | int scsi_is_fc_vport(const struct device *dev) | |
1938 | { | |
1939 | return dev->release == fc_vport_dev_release; | |
1940 | } | |
1941 | EXPORT_SYMBOL(scsi_is_fc_vport); | |
1942 | ||
1943 | static int fc_vport_match(struct attribute_container *cont, | |
1944 | struct device *dev) | |
1945 | { | |
1946 | struct fc_vport *vport; | |
1947 | struct Scsi_Host *shost; | |
1948 | struct fc_internal *i; | |
1949 | ||
1950 | if (!scsi_is_fc_vport(dev)) | |
1951 | return 0; | |
1952 | vport = dev_to_vport(dev); | |
1953 | ||
1954 | shost = vport_to_shost(vport); | |
1955 | if (!shost->transportt || shost->transportt->host_attrs.ac.class | |
1956 | != &fc_host_class.class) | |
1957 | return 0; | |
1958 | ||
1959 | i = to_fc_internal(shost->transportt); | |
1960 | return &i->vport_attr_cont.ac == cont; | |
1961 | } | |
1962 | ||
1963 | ||
c829c394 JS |
1964 | /** |
1965 | * fc_timed_out - FC Transport I/O timeout intercept handler | |
c829c394 JS |
1966 | * @scmd: The SCSI command which timed out |
1967 | * | |
1968 | * This routine protects against error handlers getting invoked while a | |
1969 | * rport is in a blocked state, typically due to a temporarily loss of | |
1970 | * connectivity. If the error handlers are allowed to proceed, requests | |
1971 | * to abort i/o, reset the target, etc will likely fail as there is no way | |
1972 | * to communicate with the device to perform the requested function. These | |
1973 | * failures may result in the midlayer taking the device offline, requiring | |
1974 | * manual intervention to restore operation. | |
1975 | * | |
1976 | * This routine, called whenever an i/o times out, validates the state of | |
1977 | * the underlying rport. If the rport is blocked, it returns | |
1978 | * EH_RESET_TIMER, which will continue to reschedule the timeout. | |
1979 | * Eventually, either the device will return, or devloss_tmo will fire, | |
1980 | * and when the timeout then fires, it will be handled normally. | |
1981 | * If the rport is not blocked, normal error handling continues. | |
1982 | * | |
1983 | * Notes: | |
1984 | * This routine assumes no locks are held on entry. | |
eb44820c | 1985 | */ |
242f9dcb | 1986 | static enum blk_eh_timer_return |
c829c394 JS |
1987 | fc_timed_out(struct scsi_cmnd *scmd) |
1988 | { | |
1989 | struct fc_rport *rport = starget_to_rport(scsi_target(scmd->device)); | |
1990 | ||
1991 | if (rport->port_state == FC_PORTSTATE_BLOCKED) | |
242f9dcb | 1992 | return BLK_EH_RESET_TIMER; |
c829c394 | 1993 | |
242f9dcb | 1994 | return BLK_EH_NOT_HANDLED; |
c829c394 JS |
1995 | } |
1996 | ||
5c44cd2a | 1997 | /* |
bda23253 JS |
1998 | * Called by fc_user_scan to locate an rport on the shost that |
1999 | * matches the channel and target id, and invoke scsi_scan_target() | |
2000 | * on the rport. | |
5c44cd2a | 2001 | */ |
bda23253 JS |
2002 | static void |
2003 | fc_user_scan_tgt(struct Scsi_Host *shost, uint channel, uint id, uint lun) | |
5c44cd2a JSEC |
2004 | { |
2005 | struct fc_rport *rport; | |
bda23253 JS |
2006 | unsigned long flags; |
2007 | ||
2008 | spin_lock_irqsave(shost->host_lock, flags); | |
5c44cd2a | 2009 | |
e02f3f59 CH |
2010 | list_for_each_entry(rport, &fc_host_rports(shost), peers) { |
2011 | if (rport->scsi_target_id == -1) | |
2012 | continue; | |
5c44cd2a | 2013 | |
0d2fcd9f HR |
2014 | if (rport->port_state != FC_PORTSTATE_ONLINE) |
2015 | continue; | |
2016 | ||
bda23253 JS |
2017 | if ((channel == rport->channel) && |
2018 | (id == rport->scsi_target_id)) { | |
2019 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2020 | scsi_scan_target(&rport->dev, channel, id, lun, 1); | |
2021 | return; | |
e02f3f59 CH |
2022 | } |
2023 | } | |
2024 | ||
bda23253 JS |
2025 | spin_unlock_irqrestore(shost->host_lock, flags); |
2026 | } | |
2027 | ||
2028 | /* | |
2029 | * Called via sysfs scan routines. Necessary, as the FC transport | |
2030 | * wants to place all target objects below the rport object. So this | |
2031 | * routine must invoke the scsi_scan_target() routine with the rport | |
2032 | * object as the parent. | |
2033 | */ | |
2034 | static int | |
2035 | fc_user_scan(struct Scsi_Host *shost, uint channel, uint id, uint lun) | |
2036 | { | |
2037 | uint chlo, chhi; | |
2038 | uint tgtlo, tgthi; | |
2039 | ||
2040 | if (((channel != SCAN_WILD_CARD) && (channel > shost->max_channel)) || | |
2041 | ((id != SCAN_WILD_CARD) && (id >= shost->max_id)) || | |
2042 | ((lun != SCAN_WILD_CARD) && (lun > shost->max_lun))) | |
2043 | return -EINVAL; | |
2044 | ||
2045 | if (channel == SCAN_WILD_CARD) { | |
2046 | chlo = 0; | |
2047 | chhi = shost->max_channel + 1; | |
2048 | } else { | |
2049 | chlo = channel; | |
2050 | chhi = channel + 1; | |
2051 | } | |
2052 | ||
2053 | if (id == SCAN_WILD_CARD) { | |
2054 | tgtlo = 0; | |
2055 | tgthi = shost->max_id; | |
2056 | } else { | |
2057 | tgtlo = id; | |
2058 | tgthi = id + 1; | |
2059 | } | |
2060 | ||
2061 | for ( ; chlo < chhi; chlo++) | |
2062 | for ( ; tgtlo < tgthi; tgtlo++) | |
2063 | fc_user_scan_tgt(shost, chlo, tgtlo, lun); | |
2064 | ||
e02f3f59 | 2065 | return 0; |
5c44cd2a JSEC |
2066 | } |
2067 | ||
7525236d FT |
2068 | static int fc_tsk_mgmt_response(struct Scsi_Host *shost, u64 nexus, u64 tm_id, |
2069 | int result) | |
2070 | { | |
2071 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
2072 | return i->f->tsk_mgmt_response(shost, nexus, tm_id, result); | |
2073 | } | |
2074 | ||
2075 | static int fc_it_nexus_response(struct Scsi_Host *shost, u64 nexus, int result) | |
2076 | { | |
2077 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
2078 | return i->f->it_nexus_response(shost, nexus, result); | |
2079 | } | |
2080 | ||
1da177e4 LT |
2081 | struct scsi_transport_template * |
2082 | fc_attach_transport(struct fc_function_template *ft) | |
2083 | { | |
1da177e4 | 2084 | int count; |
24669f75 JS |
2085 | struct fc_internal *i = kzalloc(sizeof(struct fc_internal), |
2086 | GFP_KERNEL); | |
1da177e4 LT |
2087 | |
2088 | if (unlikely(!i)) | |
2089 | return NULL; | |
2090 | ||
1da177e4 LT |
2091 | i->t.target_attrs.ac.attrs = &i->starget_attrs[0]; |
2092 | i->t.target_attrs.ac.class = &fc_transport_class.class; | |
2093 | i->t.target_attrs.ac.match = fc_target_match; | |
2094 | i->t.target_size = sizeof(struct fc_starget_attrs); | |
2095 | transport_container_register(&i->t.target_attrs); | |
2096 | ||
2097 | i->t.host_attrs.ac.attrs = &i->host_attrs[0]; | |
2098 | i->t.host_attrs.ac.class = &fc_host_class.class; | |
2099 | i->t.host_attrs.ac.match = fc_host_match; | |
2100 | i->t.host_size = sizeof(struct fc_host_attrs); | |
2101 | if (ft->get_fc_host_stats) | |
2102 | i->t.host_attrs.statistics = &fc_statistics_group; | |
2103 | transport_container_register(&i->t.host_attrs); | |
2104 | ||
2105 | i->rport_attr_cont.ac.attrs = &i->rport_attrs[0]; | |
2106 | i->rport_attr_cont.ac.class = &fc_rport_class.class; | |
2107 | i->rport_attr_cont.ac.match = fc_rport_match; | |
2108 | transport_container_register(&i->rport_attr_cont); | |
2109 | ||
a53eb5e0 JS |
2110 | i->vport_attr_cont.ac.attrs = &i->vport_attrs[0]; |
2111 | i->vport_attr_cont.ac.class = &fc_vport_class.class; | |
2112 | i->vport_attr_cont.ac.match = fc_vport_match; | |
2113 | transport_container_register(&i->vport_attr_cont); | |
2114 | ||
1da177e4 LT |
2115 | i->f = ft; |
2116 | ||
2117 | /* Transport uses the shost workq for scsi scanning */ | |
2118 | i->t.create_work_queue = 1; | |
5c44cd2a | 2119 | |
c829c394 JS |
2120 | i->t.eh_timed_out = fc_timed_out; |
2121 | ||
e02f3f59 | 2122 | i->t.user_scan = fc_user_scan; |
9ef3e4a4 | 2123 | |
7525236d FT |
2124 | /* target-mode drivers' functions */ |
2125 | i->t.tsk_mgmt_response = fc_tsk_mgmt_response; | |
2126 | i->t.it_nexus_response = fc_it_nexus_response; | |
2127 | ||
1da177e4 LT |
2128 | /* |
2129 | * Setup SCSI Target Attributes. | |
2130 | */ | |
2131 | count = 0; | |
2132 | SETUP_STARGET_ATTRIBUTE_RD(node_name); | |
2133 | SETUP_STARGET_ATTRIBUTE_RD(port_name); | |
2134 | SETUP_STARGET_ATTRIBUTE_RD(port_id); | |
2135 | ||
2136 | BUG_ON(count > FC_STARGET_NUM_ATTRS); | |
2137 | ||
2138 | i->starget_attrs[count] = NULL; | |
2139 | ||
2140 | ||
2141 | /* | |
2142 | * Setup SCSI Host Attributes. | |
2143 | */ | |
2144 | count=0; | |
2145 | SETUP_HOST_ATTRIBUTE_RD(node_name); | |
2146 | SETUP_HOST_ATTRIBUTE_RD(port_name); | |
6b7281d0 | 2147 | SETUP_HOST_ATTRIBUTE_RD(permanent_port_name); |
1da177e4 LT |
2148 | SETUP_HOST_ATTRIBUTE_RD(supported_classes); |
2149 | SETUP_HOST_ATTRIBUTE_RD(supported_fc4s); | |
1da177e4 LT |
2150 | SETUP_HOST_ATTRIBUTE_RD(supported_speeds); |
2151 | SETUP_HOST_ATTRIBUTE_RD(maxframe_size); | |
a53eb5e0 JS |
2152 | if (ft->vport_create) { |
2153 | SETUP_HOST_ATTRIBUTE_RD_NS(max_npiv_vports); | |
2154 | SETUP_HOST_ATTRIBUTE_RD_NS(npiv_vports_inuse); | |
2155 | } | |
1da177e4 LT |
2156 | SETUP_HOST_ATTRIBUTE_RD(serial_number); |
2157 | ||
2158 | SETUP_HOST_ATTRIBUTE_RD(port_id); | |
2159 | SETUP_HOST_ATTRIBUTE_RD(port_type); | |
2160 | SETUP_HOST_ATTRIBUTE_RD(port_state); | |
2161 | SETUP_HOST_ATTRIBUTE_RD(active_fc4s); | |
2162 | SETUP_HOST_ATTRIBUTE_RD(speed); | |
2163 | SETUP_HOST_ATTRIBUTE_RD(fabric_name); | |
016131b8 | 2164 | SETUP_HOST_ATTRIBUTE_RD(symbolic_name); |
b8d08210 | 2165 | SETUP_HOST_ATTRIBUTE_RW(system_hostname); |
1da177e4 LT |
2166 | |
2167 | /* Transport-managed attributes */ | |
2168 | SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type); | |
91ca7b01 AV |
2169 | if (ft->issue_fc_host_lip) |
2170 | SETUP_PRIVATE_HOST_ATTRIBUTE_RW(issue_lip); | |
a53eb5e0 JS |
2171 | if (ft->vport_create) |
2172 | SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_create); | |
2173 | if (ft->vport_delete) | |
2174 | SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_delete); | |
1da177e4 LT |
2175 | |
2176 | BUG_ON(count > FC_HOST_NUM_ATTRS); | |
2177 | ||
2178 | i->host_attrs[count] = NULL; | |
2179 | ||
2180 | /* | |
2181 | * Setup Remote Port Attributes. | |
2182 | */ | |
2183 | count=0; | |
2184 | SETUP_RPORT_ATTRIBUTE_RD(maxframe_size); | |
2185 | SETUP_RPORT_ATTRIBUTE_RD(supported_classes); | |
2186 | SETUP_RPORT_ATTRIBUTE_RW(dev_loss_tmo); | |
2187 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(node_name); | |
2188 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_name); | |
2189 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_id); | |
2190 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(roles); | |
2191 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_state); | |
2192 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(scsi_target_id); | |
fff9d40c | 2193 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(fast_io_fail_tmo); |
1da177e4 LT |
2194 | |
2195 | BUG_ON(count > FC_RPORT_NUM_ATTRS); | |
2196 | ||
2197 | i->rport_attrs[count] = NULL; | |
2198 | ||
a53eb5e0 JS |
2199 | /* |
2200 | * Setup Virtual Port Attributes. | |
2201 | */ | |
2202 | count=0; | |
2203 | SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_state); | |
2204 | SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_last_state); | |
2205 | SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(node_name); | |
2206 | SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(port_name); | |
2207 | SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(roles); | |
2208 | SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_type); | |
2209 | SETUP_VPORT_ATTRIBUTE_RW(symbolic_name); | |
2210 | SETUP_VPORT_ATTRIBUTE_WR(vport_delete); | |
2211 | SETUP_VPORT_ATTRIBUTE_WR(vport_disable); | |
2212 | ||
2213 | BUG_ON(count > FC_VPORT_NUM_ATTRS); | |
2214 | ||
2215 | i->vport_attrs[count] = NULL; | |
2216 | ||
1da177e4 LT |
2217 | return &i->t; |
2218 | } | |
2219 | EXPORT_SYMBOL(fc_attach_transport); | |
2220 | ||
2221 | void fc_release_transport(struct scsi_transport_template *t) | |
2222 | { | |
2223 | struct fc_internal *i = to_fc_internal(t); | |
2224 | ||
2225 | transport_container_unregister(&i->t.target_attrs); | |
2226 | transport_container_unregister(&i->t.host_attrs); | |
2227 | transport_container_unregister(&i->rport_attr_cont); | |
a53eb5e0 | 2228 | transport_container_unregister(&i->vport_attr_cont); |
1da177e4 LT |
2229 | |
2230 | kfree(i); | |
2231 | } | |
2232 | EXPORT_SYMBOL(fc_release_transport); | |
2233 | ||
aedf3497 JS |
2234 | /** |
2235 | * fc_queue_work - Queue work to the fc_host workqueue. | |
2236 | * @shost: Pointer to Scsi_Host bound to fc_host. | |
2237 | * @work: Work to queue for execution. | |
2238 | * | |
2239 | * Return value: | |
a0785edf JS |
2240 | * 1 - work queued for execution |
2241 | * 0 - work is already queued | |
2242 | * -EINVAL - work queue doesn't exist | |
eb44820c | 2243 | */ |
aedf3497 JS |
2244 | static int |
2245 | fc_queue_work(struct Scsi_Host *shost, struct work_struct *work) | |
2246 | { | |
2247 | if (unlikely(!fc_host_work_q(shost))) { | |
2248 | printk(KERN_ERR | |
2249 | "ERROR: FC host '%s' attempted to queue work, " | |
2250 | "when no workqueue created.\n", shost->hostt->name); | |
2251 | dump_stack(); | |
2252 | ||
2253 | return -EINVAL; | |
2254 | } | |
2255 | ||
2256 | return queue_work(fc_host_work_q(shost), work); | |
2257 | } | |
2258 | ||
2259 | /** | |
2260 | * fc_flush_work - Flush a fc_host's workqueue. | |
2261 | * @shost: Pointer to Scsi_Host bound to fc_host. | |
eb44820c | 2262 | */ |
aedf3497 JS |
2263 | static void |
2264 | fc_flush_work(struct Scsi_Host *shost) | |
2265 | { | |
2266 | if (!fc_host_work_q(shost)) { | |
2267 | printk(KERN_ERR | |
2268 | "ERROR: FC host '%s' attempted to flush work, " | |
2269 | "when no workqueue created.\n", shost->hostt->name); | |
2270 | dump_stack(); | |
2271 | return; | |
2272 | } | |
2273 | ||
2274 | flush_workqueue(fc_host_work_q(shost)); | |
2275 | } | |
2276 | ||
2277 | /** | |
2278 | * fc_queue_devloss_work - Schedule work for the fc_host devloss workqueue. | |
2279 | * @shost: Pointer to Scsi_Host bound to fc_host. | |
2280 | * @work: Work to queue for execution. | |
2281 | * @delay: jiffies to delay the work queuing | |
2282 | * | |
2283 | * Return value: | |
0f29b966 | 2284 | * 1 on success / 0 already queued / < 0 for error |
eb44820c | 2285 | */ |
aedf3497 | 2286 | static int |
c4028958 | 2287 | fc_queue_devloss_work(struct Scsi_Host *shost, struct delayed_work *work, |
aedf3497 JS |
2288 | unsigned long delay) |
2289 | { | |
2290 | if (unlikely(!fc_host_devloss_work_q(shost))) { | |
2291 | printk(KERN_ERR | |
2292 | "ERROR: FC host '%s' attempted to queue work, " | |
2293 | "when no workqueue created.\n", shost->hostt->name); | |
2294 | dump_stack(); | |
2295 | ||
2296 | return -EINVAL; | |
2297 | } | |
2298 | ||
2299 | return queue_delayed_work(fc_host_devloss_work_q(shost), work, delay); | |
2300 | } | |
2301 | ||
2302 | /** | |
2303 | * fc_flush_devloss - Flush a fc_host's devloss workqueue. | |
2304 | * @shost: Pointer to Scsi_Host bound to fc_host. | |
eb44820c | 2305 | */ |
aedf3497 JS |
2306 | static void |
2307 | fc_flush_devloss(struct Scsi_Host *shost) | |
2308 | { | |
2309 | if (!fc_host_devloss_work_q(shost)) { | |
2310 | printk(KERN_ERR | |
2311 | "ERROR: FC host '%s' attempted to flush work, " | |
2312 | "when no workqueue created.\n", shost->hostt->name); | |
2313 | dump_stack(); | |
2314 | return; | |
2315 | } | |
2316 | ||
2317 | flush_workqueue(fc_host_devloss_work_q(shost)); | |
2318 | } | |
2319 | ||
1da177e4 LT |
2320 | |
2321 | /** | |
eb44820c RL |
2322 | * fc_remove_host - called to terminate any fc_transport-related elements for a scsi host. |
2323 | * @shost: Which &Scsi_Host | |
1da177e4 LT |
2324 | * |
2325 | * This routine is expected to be called immediately preceeding the | |
2326 | * a driver's call to scsi_remove_host(). | |
2327 | * | |
2328 | * WARNING: A driver utilizing the fc_transport, which fails to call | |
eb44820c | 2329 | * this routine prior to scsi_remove_host(), will leave dangling |
1da177e4 LT |
2330 | * objects in /sys/class/fc_remote_ports. Access to any of these |
2331 | * objects can result in a system crash !!! | |
2332 | * | |
2333 | * Notes: | |
2334 | * This routine assumes no locks are held on entry. | |
eb44820c | 2335 | */ |
1da177e4 LT |
2336 | void |
2337 | fc_remove_host(struct Scsi_Host *shost) | |
2338 | { | |
a53eb5e0 JS |
2339 | struct fc_vport *vport = NULL, *next_vport = NULL; |
2340 | struct fc_rport *rport = NULL, *next_rport = NULL; | |
aedf3497 JS |
2341 | struct workqueue_struct *work_q; |
2342 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); | |
a53eb5e0 | 2343 | unsigned long flags; |
a53eb5e0 JS |
2344 | |
2345 | spin_lock_irqsave(shost->host_lock, flags); | |
2346 | ||
2347 | /* Remove any vports */ | |
9ef3e4a4 JS |
2348 | list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers) |
2349 | fc_queue_work(shost, &vport->vport_delete_work); | |
1da177e4 LT |
2350 | |
2351 | /* Remove any remote ports */ | |
2352 | list_for_each_entry_safe(rport, next_rport, | |
aedf3497 JS |
2353 | &fc_host->rports, peers) { |
2354 | list_del(&rport->peers); | |
2355 | rport->port_state = FC_PORTSTATE_DELETED; | |
2356 | fc_queue_work(shost, &rport->rport_delete_work); | |
2357 | } | |
2358 | ||
1da177e4 | 2359 | list_for_each_entry_safe(rport, next_rport, |
aedf3497 JS |
2360 | &fc_host->rport_bindings, peers) { |
2361 | list_del(&rport->peers); | |
2362 | rport->port_state = FC_PORTSTATE_DELETED; | |
2363 | fc_queue_work(shost, &rport->rport_delete_work); | |
2364 | } | |
2365 | ||
a53eb5e0 JS |
2366 | spin_unlock_irqrestore(shost->host_lock, flags); |
2367 | ||
aedf3497 JS |
2368 | /* flush all scan work items */ |
2369 | scsi_flush_work(shost); | |
2370 | ||
2371 | /* flush all stgt delete, and rport delete work items, then kill it */ | |
2372 | if (fc_host->work_q) { | |
2373 | work_q = fc_host->work_q; | |
2374 | fc_host->work_q = NULL; | |
2375 | destroy_workqueue(work_q); | |
2376 | } | |
2377 | ||
2378 | /* flush all devloss work items, then kill it */ | |
2379 | if (fc_host->devloss_work_q) { | |
2380 | work_q = fc_host->devloss_work_q; | |
2381 | fc_host->devloss_work_q = NULL; | |
2382 | destroy_workqueue(work_q); | |
2383 | } | |
1da177e4 LT |
2384 | } |
2385 | EXPORT_SYMBOL(fc_remove_host); | |
2386 | ||
fff9d40c MC |
2387 | static void fc_terminate_rport_io(struct fc_rport *rport) |
2388 | { | |
2389 | struct Scsi_Host *shost = rport_to_shost(rport); | |
2390 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
2391 | ||
2392 | /* Involve the LLDD if possible to terminate all io on the rport. */ | |
2393 | if (i->f->terminate_rport_io) | |
2394 | i->f->terminate_rport_io(rport); | |
2395 | ||
2396 | /* | |
2397 | * must unblock to flush queued IO. The caller will have set | |
2398 | * the port_state or flags, so that fc_remote_port_chkready will | |
2399 | * fail IO. | |
2400 | */ | |
2401 | scsi_target_unblock(&rport->dev); | |
2402 | } | |
aedf3497 JS |
2403 | |
2404 | /** | |
2405 | * fc_starget_delete - called to delete the scsi decendents of an rport | |
c4028958 | 2406 | * @work: remote port to be operated on. |
eb44820c RL |
2407 | * |
2408 | * Deletes target and all sdevs. | |
2409 | */ | |
19a7b4ae | 2410 | static void |
c4028958 | 2411 | fc_starget_delete(struct work_struct *work) |
19a7b4ae | 2412 | { |
c4028958 DH |
2413 | struct fc_rport *rport = |
2414 | container_of(work, struct fc_rport, stgt_delete_work); | |
19a7b4ae | 2415 | |
fff9d40c | 2416 | fc_terminate_rport_io(rport); |
19a7b4ae JSEC |
2417 | scsi_remove_target(&rport->dev); |
2418 | } | |
2419 | ||
aedf3497 JS |
2420 | |
2421 | /** | |
2422 | * fc_rport_final_delete - finish rport termination and delete it. | |
c4028958 | 2423 | * @work: remote port to be deleted. |
eb44820c | 2424 | */ |
aedf3497 | 2425 | static void |
c4028958 | 2426 | fc_rport_final_delete(struct work_struct *work) |
aedf3497 | 2427 | { |
c4028958 DH |
2428 | struct fc_rport *rport = |
2429 | container_of(work, struct fc_rport, rport_delete_work); | |
aedf3497 JS |
2430 | struct device *dev = &rport->dev; |
2431 | struct Scsi_Host *shost = rport_to_shost(rport); | |
0f29b966 | 2432 | struct fc_internal *i = to_fc_internal(shost->transportt); |
92740b24 | 2433 | unsigned long flags; |
8798a694 | 2434 | int do_callback = 0; |
aedf3497 JS |
2435 | |
2436 | /* | |
9ef3e4a4 | 2437 | * if a scan is pending, flush the SCSI Host work_q so that |
aedf3497 JS |
2438 | * that we can reclaim the rport scan work element. |
2439 | */ | |
2440 | if (rport->flags & FC_RPORT_SCAN_PENDING) | |
2441 | scsi_flush_work(shost); | |
2442 | ||
fff9d40c | 2443 | fc_terminate_rport_io(rport); |
9e4f5e29 | 2444 | |
92740b24 JS |
2445 | /* |
2446 | * Cancel any outstanding timers. These should really exist | |
2447 | * only when rmmod'ing the LLDD and we're asking for | |
2448 | * immediate termination of the rports | |
2449 | */ | |
2450 | spin_lock_irqsave(shost->host_lock, flags); | |
2451 | if (rport->flags & FC_RPORT_DEVLOSS_PENDING) { | |
2452 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2453 | if (!cancel_delayed_work(&rport->fail_io_work)) | |
2454 | fc_flush_devloss(shost); | |
2455 | if (!cancel_delayed_work(&rport->dev_loss_work)) | |
2456 | fc_flush_devloss(shost); | |
2457 | spin_lock_irqsave(shost->host_lock, flags); | |
2458 | rport->flags &= ~FC_RPORT_DEVLOSS_PENDING; | |
2459 | } | |
2460 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2461 | ||
0f29b966 JS |
2462 | /* Delete SCSI target and sdevs */ |
2463 | if (rport->scsi_target_id != -1) | |
c4028958 | 2464 | fc_starget_delete(&rport->stgt_delete_work); |
92740b24 JS |
2465 | |
2466 | /* | |
2467 | * Notify the driver that the rport is now dead. The LLDD will | |
2468 | * also guarantee that any communication to the rport is terminated | |
4be98c0c JS |
2469 | * |
2470 | * Avoid this call if we already called it when we preserved the | |
2471 | * rport for the binding. | |
92740b24 | 2472 | */ |
8798a694 | 2473 | spin_lock_irqsave(shost->host_lock, flags); |
4be98c0c | 2474 | if (!(rport->flags & FC_RPORT_DEVLOSS_CALLBK_DONE) && |
8798a694 MR |
2475 | (i->f->dev_loss_tmo_callbk)) { |
2476 | rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE; | |
2477 | do_callback = 1; | |
2478 | } | |
2479 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2480 | ||
2481 | if (do_callback) | |
0f29b966 | 2482 | i->f->dev_loss_tmo_callbk(rport); |
0f29b966 | 2483 | |
9e4f5e29 JS |
2484 | fc_bsg_remove(rport->rqst_q); |
2485 | ||
aedf3497 JS |
2486 | transport_remove_device(dev); |
2487 | device_del(dev); | |
2488 | transport_destroy_device(dev); | |
3bdad7bd JS |
2489 | put_device(&shost->shost_gendev); /* for fc_host->rport list */ |
2490 | put_device(dev); /* for self-reference */ | |
aedf3497 JS |
2491 | } |
2492 | ||
2493 | ||
1da177e4 LT |
2494 | /** |
2495 | * fc_rport_create - allocates and creates a remote FC port. | |
2496 | * @shost: scsi host the remote port is connected to. | |
2497 | * @channel: Channel on shost port connected to. | |
2498 | * @ids: The world wide names, fc address, and FC4 port | |
2499 | * roles for the remote port. | |
2500 | * | |
2501 | * Allocates and creates the remoter port structure, including the | |
2502 | * class and sysfs creation. | |
2503 | * | |
2504 | * Notes: | |
2505 | * This routine assumes no locks are held on entry. | |
eb44820c | 2506 | */ |
44818efb | 2507 | static struct fc_rport * |
1da177e4 LT |
2508 | fc_rport_create(struct Scsi_Host *shost, int channel, |
2509 | struct fc_rport_identifiers *ids) | |
2510 | { | |
aedf3497 | 2511 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
1da177e4 LT |
2512 | struct fc_internal *fci = to_fc_internal(shost->transportt); |
2513 | struct fc_rport *rport; | |
2514 | struct device *dev; | |
2515 | unsigned long flags; | |
2516 | int error; | |
2517 | size_t size; | |
2518 | ||
2519 | size = (sizeof(struct fc_rport) + fci->f->dd_fcrport_size); | |
24669f75 | 2520 | rport = kzalloc(size, GFP_KERNEL); |
1da177e4 | 2521 | if (unlikely(!rport)) { |
cadbd4a5 | 2522 | printk(KERN_ERR "%s: allocation failure\n", __func__); |
1da177e4 LT |
2523 | return NULL; |
2524 | } | |
1da177e4 LT |
2525 | |
2526 | rport->maxframe_size = -1; | |
2527 | rport->supported_classes = FC_COS_UNSPECIFIED; | |
2528 | rport->dev_loss_tmo = fc_dev_loss_tmo; | |
2529 | memcpy(&rport->node_name, &ids->node_name, sizeof(rport->node_name)); | |
2530 | memcpy(&rport->port_name, &ids->port_name, sizeof(rport->port_name)); | |
2531 | rport->port_id = ids->port_id; | |
2532 | rport->roles = ids->roles; | |
2533 | rport->port_state = FC_PORTSTATE_ONLINE; | |
2534 | if (fci->f->dd_fcrport_size) | |
2535 | rport->dd_data = &rport[1]; | |
2536 | rport->channel = channel; | |
0f29b966 | 2537 | rport->fast_io_fail_tmo = -1; |
1da177e4 | 2538 | |
c4028958 DH |
2539 | INIT_DELAYED_WORK(&rport->dev_loss_work, fc_timeout_deleted_rport); |
2540 | INIT_DELAYED_WORK(&rport->fail_io_work, fc_timeout_fail_rport_io); | |
2541 | INIT_WORK(&rport->scan_work, fc_scsi_scan_rport); | |
2542 | INIT_WORK(&rport->stgt_delete_work, fc_starget_delete); | |
2543 | INIT_WORK(&rport->rport_delete_work, fc_rport_final_delete); | |
1da177e4 LT |
2544 | |
2545 | spin_lock_irqsave(shost->host_lock, flags); | |
2546 | ||
2547 | rport->number = fc_host->next_rport_number++; | |
a53eb5e0 | 2548 | if (rport->roles & FC_PORT_ROLE_FCP_TARGET) |
1da177e4 LT |
2549 | rport->scsi_target_id = fc_host->next_target_id++; |
2550 | else | |
2551 | rport->scsi_target_id = -1; | |
aedf3497 | 2552 | list_add_tail(&rport->peers, &fc_host->rports); |
3bdad7bd | 2553 | get_device(&shost->shost_gendev); /* for fc_host->rport list */ |
1da177e4 LT |
2554 | |
2555 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2556 | ||
2557 | dev = &rport->dev; | |
3bdad7bd JS |
2558 | device_initialize(dev); /* takes self reference */ |
2559 | dev->parent = get_device(&shost->shost_gendev); /* parent reference */ | |
1da177e4 | 2560 | dev->release = fc_rport_dev_release; |
71610f55 KS |
2561 | dev_set_name(dev, "rport-%d:%d-%d", |
2562 | shost->host_no, channel, rport->number); | |
1da177e4 LT |
2563 | transport_setup_device(dev); |
2564 | ||
2565 | error = device_add(dev); | |
2566 | if (error) { | |
2567 | printk(KERN_ERR "FC Remote Port device_add failed\n"); | |
2568 | goto delete_rport; | |
2569 | } | |
2570 | transport_add_device(dev); | |
2571 | transport_configure_device(dev); | |
2572 | ||
9e4f5e29 JS |
2573 | fc_bsg_rportadd(shost, rport); |
2574 | /* ignore any bsg add error - we just can't do sgio */ | |
2575 | ||
a53eb5e0 | 2576 | if (rport->roles & FC_PORT_ROLE_FCP_TARGET) { |
1da177e4 | 2577 | /* initiate a scan of the target */ |
aedf3497 | 2578 | rport->flags |= FC_RPORT_SCAN_PENDING; |
1da177e4 | 2579 | scsi_queue_work(shost, &rport->scan_work); |
aedf3497 | 2580 | } |
1da177e4 LT |
2581 | |
2582 | return rport; | |
2583 | ||
2584 | delete_rport: | |
2585 | transport_destroy_device(dev); | |
1da177e4 LT |
2586 | spin_lock_irqsave(shost->host_lock, flags); |
2587 | list_del(&rport->peers); | |
3bdad7bd | 2588 | put_device(&shost->shost_gendev); /* for fc_host->rport list */ |
1da177e4 LT |
2589 | spin_unlock_irqrestore(shost->host_lock, flags); |
2590 | put_device(dev->parent); | |
2591 | kfree(rport); | |
2592 | return NULL; | |
2593 | } | |
2594 | ||
2595 | /** | |
eb44820c | 2596 | * fc_remote_port_add - notify fc transport of the existence of a remote FC port. |
1da177e4 LT |
2597 | * @shost: scsi host the remote port is connected to. |
2598 | * @channel: Channel on shost port connected to. | |
2599 | * @ids: The world wide names, fc address, and FC4 port | |
2600 | * roles for the remote port. | |
2601 | * | |
2602 | * The LLDD calls this routine to notify the transport of the existence | |
2603 | * of a remote port. The LLDD provides the unique identifiers (wwpn,wwn) | |
2604 | * of the port, it's FC address (port_id), and the FC4 roles that are | |
2605 | * active for the port. | |
2606 | * | |
2607 | * For ports that are FCP targets (aka scsi targets), the FC transport | |
2608 | * maintains consistent target id bindings on behalf of the LLDD. | |
2609 | * A consistent target id binding is an assignment of a target id to | |
2610 | * a remote port identifier, which persists while the scsi host is | |
2611 | * attached. The remote port can disappear, then later reappear, and | |
2612 | * it's target id assignment remains the same. This allows for shifts | |
2613 | * in FC addressing (if binding by wwpn or wwnn) with no apparent | |
2614 | * changes to the scsi subsystem which is based on scsi host number and | |
2615 | * target id values. Bindings are only valid during the attachment of | |
2616 | * the scsi host. If the host detaches, then later re-attaches, target | |
2617 | * id bindings may change. | |
2618 | * | |
2619 | * This routine is responsible for returning a remote port structure. | |
2620 | * The routine will search the list of remote ports it maintains | |
2621 | * internally on behalf of consistent target id mappings. If found, the | |
2622 | * remote port structure will be reused. Otherwise, a new remote port | |
2623 | * structure will be allocated. | |
2624 | * | |
2625 | * Whenever a remote port is allocated, a new fc_remote_port class | |
2626 | * device is created. | |
2627 | * | |
2628 | * Should not be called from interrupt context. | |
2629 | * | |
2630 | * Notes: | |
2631 | * This routine assumes no locks are held on entry. | |
eb44820c | 2632 | */ |
1da177e4 LT |
2633 | struct fc_rport * |
2634 | fc_remote_port_add(struct Scsi_Host *shost, int channel, | |
2635 | struct fc_rport_identifiers *ids) | |
2636 | { | |
19a7b4ae | 2637 | struct fc_internal *fci = to_fc_internal(shost->transportt); |
aedf3497 | 2638 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
1da177e4 LT |
2639 | struct fc_rport *rport; |
2640 | unsigned long flags; | |
2641 | int match = 0; | |
2642 | ||
aedf3497 JS |
2643 | /* ensure any stgt delete functions are done */ |
2644 | fc_flush_work(shost); | |
2645 | ||
19a7b4ae JSEC |
2646 | /* |
2647 | * Search the list of "active" rports, for an rport that has been | |
2648 | * deleted, but we've held off the real delete while the target | |
2649 | * is in a "blocked" state. | |
2650 | */ | |
2651 | spin_lock_irqsave(shost->host_lock, flags); | |
2652 | ||
aedf3497 | 2653 | list_for_each_entry(rport, &fc_host->rports, peers) { |
19a7b4ae JSEC |
2654 | |
2655 | if ((rport->port_state == FC_PORTSTATE_BLOCKED) && | |
2656 | (rport->channel == channel)) { | |
2657 | ||
aedf3497 | 2658 | switch (fc_host->tgtid_bind_type) { |
19a7b4ae JSEC |
2659 | case FC_TGTID_BIND_BY_WWPN: |
2660 | case FC_TGTID_BIND_NONE: | |
2661 | if (rport->port_name == ids->port_name) | |
2662 | match = 1; | |
2663 | break; | |
2664 | case FC_TGTID_BIND_BY_WWNN: | |
2665 | if (rport->node_name == ids->node_name) | |
2666 | match = 1; | |
2667 | break; | |
2668 | case FC_TGTID_BIND_BY_ID: | |
2669 | if (rport->port_id == ids->port_id) | |
2670 | match = 1; | |
2671 | break; | |
2672 | } | |
2673 | ||
2674 | if (match) { | |
19a7b4ae JSEC |
2675 | |
2676 | memcpy(&rport->node_name, &ids->node_name, | |
2677 | sizeof(rport->node_name)); | |
2678 | memcpy(&rport->port_name, &ids->port_name, | |
2679 | sizeof(rport->port_name)); | |
2680 | rport->port_id = ids->port_id; | |
2681 | ||
2682 | rport->port_state = FC_PORTSTATE_ONLINE; | |
2683 | rport->roles = ids->roles; | |
2684 | ||
2685 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2686 | ||
2687 | if (fci->f->dd_fcrport_size) | |
2688 | memset(rport->dd_data, 0, | |
2689 | fci->f->dd_fcrport_size); | |
2690 | ||
2691 | /* | |
92740b24 JS |
2692 | * If we were not a target, cancel the |
2693 | * io terminate and rport timers, and | |
2694 | * we're done. | |
2695 | * | |
2696 | * If we were a target, but our new role | |
2697 | * doesn't indicate a target, leave the | |
2698 | * timers running expecting the role to | |
2699 | * change as the target fully logs in. If | |
2700 | * it doesn't, the target will be torn down. | |
2701 | * | |
2702 | * If we were a target, and our role shows | |
2703 | * we're still a target, cancel the timers | |
2704 | * and kick off a scan. | |
19a7b4ae | 2705 | */ |
19a7b4ae | 2706 | |
92740b24 JS |
2707 | /* was a target, not in roles */ |
2708 | if ((rport->scsi_target_id != -1) && | |
a53eb5e0 | 2709 | (!(ids->roles & FC_PORT_ROLE_FCP_TARGET))) |
92740b24 | 2710 | return rport; |
19a7b4ae JSEC |
2711 | |
2712 | /* | |
92740b24 JS |
2713 | * Stop the fail io and dev_loss timers. |
2714 | * If they flush, the port_state will | |
2715 | * be checked and will NOOP the function. | |
19a7b4ae | 2716 | */ |
0f29b966 JS |
2717 | if (!cancel_delayed_work(&rport->fail_io_work)) |
2718 | fc_flush_devloss(shost); | |
92740b24 | 2719 | if (!cancel_delayed_work(&rport->dev_loss_work)) |
aedf3497 JS |
2720 | fc_flush_devloss(shost); |
2721 | ||
2722 | spin_lock_irqsave(shost->host_lock, flags); | |
2723 | ||
fff9d40c | 2724 | rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT | |
4be98c0c JS |
2725 | FC_RPORT_DEVLOSS_PENDING | |
2726 | FC_RPORT_DEVLOSS_CALLBK_DONE); | |
19a7b4ae | 2727 | |
92740b24 JS |
2728 | /* if target, initiate a scan */ |
2729 | if (rport->scsi_target_id != -1) { | |
2730 | rport->flags |= FC_RPORT_SCAN_PENDING; | |
2731 | scsi_queue_work(shost, | |
2732 | &rport->scan_work); | |
2733 | spin_unlock_irqrestore(shost->host_lock, | |
2734 | flags); | |
2735 | scsi_target_unblock(&rport->dev); | |
2736 | } else | |
2737 | spin_unlock_irqrestore(shost->host_lock, | |
2738 | flags); | |
a0785edf | 2739 | |
9e4f5e29 JS |
2740 | fc_bsg_goose_queue(rport); |
2741 | ||
19a7b4ae JSEC |
2742 | return rport; |
2743 | } | |
2744 | } | |
2745 | } | |
2746 | ||
92740b24 JS |
2747 | /* |
2748 | * Search the bindings array | |
2749 | * Note: if never a FCP target, you won't be on this list | |
2750 | */ | |
aedf3497 | 2751 | if (fc_host->tgtid_bind_type != FC_TGTID_BIND_NONE) { |
1da177e4 LT |
2752 | |
2753 | /* search for a matching consistent binding */ | |
2754 | ||
aedf3497 | 2755 | list_for_each_entry(rport, &fc_host->rport_bindings, |
1da177e4 LT |
2756 | peers) { |
2757 | if (rport->channel != channel) | |
2758 | continue; | |
2759 | ||
aedf3497 | 2760 | switch (fc_host->tgtid_bind_type) { |
1da177e4 LT |
2761 | case FC_TGTID_BIND_BY_WWPN: |
2762 | if (rport->port_name == ids->port_name) | |
2763 | match = 1; | |
2764 | break; | |
2765 | case FC_TGTID_BIND_BY_WWNN: | |
2766 | if (rport->node_name == ids->node_name) | |
2767 | match = 1; | |
2768 | break; | |
2769 | case FC_TGTID_BIND_BY_ID: | |
2770 | if (rport->port_id == ids->port_id) | |
2771 | match = 1; | |
2772 | break; | |
2773 | case FC_TGTID_BIND_NONE: /* to keep compiler happy */ | |
2774 | break; | |
2775 | } | |
2776 | ||
2777 | if (match) { | |
aedf3497 | 2778 | list_move_tail(&rport->peers, &fc_host->rports); |
1da177e4 LT |
2779 | break; |
2780 | } | |
2781 | } | |
2782 | ||
1da177e4 LT |
2783 | if (match) { |
2784 | memcpy(&rport->node_name, &ids->node_name, | |
2785 | sizeof(rport->node_name)); | |
2786 | memcpy(&rport->port_name, &ids->port_name, | |
2787 | sizeof(rport->port_name)); | |
2788 | rport->port_id = ids->port_id; | |
2789 | rport->roles = ids->roles; | |
2790 | rport->port_state = FC_PORTSTATE_ONLINE; | |
fff9d40c | 2791 | rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT; |
1da177e4 | 2792 | |
19a7b4ae JSEC |
2793 | if (fci->f->dd_fcrport_size) |
2794 | memset(rport->dd_data, 0, | |
2795 | fci->f->dd_fcrport_size); | |
2796 | ||
a53eb5e0 | 2797 | if (rport->roles & FC_PORT_ROLE_FCP_TARGET) { |
1da177e4 | 2798 | /* initiate a scan of the target */ |
aedf3497 | 2799 | rport->flags |= FC_RPORT_SCAN_PENDING; |
1da177e4 | 2800 | scsi_queue_work(shost, &rport->scan_work); |
a0785edf JS |
2801 | spin_unlock_irqrestore(shost->host_lock, flags); |
2802 | scsi_target_unblock(&rport->dev); | |
2803 | } else | |
2804 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1da177e4 LT |
2805 | |
2806 | return rport; | |
2807 | } | |
2808 | } | |
2809 | ||
19a7b4ae JSEC |
2810 | spin_unlock_irqrestore(shost->host_lock, flags); |
2811 | ||
1da177e4 LT |
2812 | /* No consistent binding found - create new remote port entry */ |
2813 | rport = fc_rport_create(shost, channel, ids); | |
2814 | ||
2815 | return rport; | |
2816 | } | |
2817 | EXPORT_SYMBOL(fc_remote_port_add); | |
2818 | ||
1da177e4 LT |
2819 | |
2820 | /** | |
eb44820c | 2821 | * fc_remote_port_delete - notifies the fc transport that a remote port is no longer in existence. |
1da177e4 LT |
2822 | * @rport: The remote port that no longer exists |
2823 | * | |
2824 | * The LLDD calls this routine to notify the transport that a remote | |
2825 | * port is no longer part of the topology. Note: Although a port | |
2826 | * may no longer be part of the topology, it may persist in the remote | |
19a7b4ae | 2827 | * ports displayed by the fc_host. We do this under 2 conditions: |
eb44820c | 2828 | * 1) If the port was a scsi target, we delay its deletion by "blocking" it. |
19a7b4ae JSEC |
2829 | * This allows the port to temporarily disappear, then reappear without |
2830 | * disrupting the SCSI device tree attached to it. During the "blocked" | |
2831 | * period the port will still exist. | |
eb44820c | 2832 | * 2) If the port was a scsi target and disappears for longer than we |
19a7b4ae JSEC |
2833 | * expect, we'll delete the port and the tear down the SCSI device tree |
2834 | * attached to it. However, we want to semi-persist the target id assigned | |
2835 | * to that port if it eventually does exist. The port structure will | |
2836 | * remain (although with minimal information) so that the target id | |
2837 | * bindings remails. | |
1da177e4 LT |
2838 | * |
2839 | * If the remote port is not an FCP Target, it will be fully torn down | |
2840 | * and deallocated, including the fc_remote_port class device. | |
2841 | * | |
19a7b4ae JSEC |
2842 | * If the remote port is an FCP Target, the port will be placed in a |
2843 | * temporary blocked state. From the LLDD's perspective, the rport no | |
2844 | * longer exists. From the SCSI midlayer's perspective, the SCSI target | |
2845 | * exists, but all sdevs on it are blocked from further I/O. The following | |
eb44820c RL |
2846 | * is then expected. |
2847 | * | |
19a7b4ae JSEC |
2848 | * If the remote port does not return (signaled by a LLDD call to |
2849 | * fc_remote_port_add()) within the dev_loss_tmo timeout, then the | |
2850 | * scsi target is removed - killing all outstanding i/o and removing the | |
2851 | * scsi devices attached ot it. The port structure will be marked Not | |
2852 | * Present and be partially cleared, leaving only enough information to | |
2853 | * recognize the remote port relative to the scsi target id binding if | |
2854 | * it later appears. The port will remain as long as there is a valid | |
2855 | * binding (e.g. until the user changes the binding type or unloads the | |
2856 | * scsi host with the binding). | |
1da177e4 | 2857 | * |
19a7b4ae JSEC |
2858 | * If the remote port returns within the dev_loss_tmo value (and matches |
2859 | * according to the target id binding type), the port structure will be | |
2860 | * reused. If it is no longer a SCSI target, the target will be torn | |
2861 | * down. If it continues to be a SCSI target, then the target will be | |
2862 | * unblocked (allowing i/o to be resumed), and a scan will be activated | |
2863 | * to ensure that all luns are detected. | |
2864 | * | |
2865 | * Called from normal process context only - cannot be called from interrupt. | |
1da177e4 LT |
2866 | * |
2867 | * Notes: | |
2868 | * This routine assumes no locks are held on entry. | |
eb44820c | 2869 | */ |
1da177e4 LT |
2870 | void |
2871 | fc_remote_port_delete(struct fc_rport *rport) | |
2872 | { | |
aedf3497 | 2873 | struct Scsi_Host *shost = rport_to_shost(rport); |
36dd288f | 2874 | unsigned long timeout = rport->dev_loss_tmo; |
aedf3497 JS |
2875 | unsigned long flags; |
2876 | ||
2877 | /* | |
2878 | * No need to flush the fc_host work_q's, as all adds are synchronous. | |
2879 | * | |
2880 | * We do need to reclaim the rport scan work element, so eventually | |
2881 | * (in fc_rport_final_delete()) we'll flush the scsi host work_q if | |
2882 | * there's still a scan pending. | |
2883 | */ | |
2884 | ||
2885 | spin_lock_irqsave(shost->host_lock, flags); | |
1da177e4 | 2886 | |
92740b24 | 2887 | if (rport->port_state != FC_PORTSTATE_ONLINE) { |
aedf3497 | 2888 | spin_unlock_irqrestore(shost->host_lock, flags); |
1da177e4 LT |
2889 | return; |
2890 | } | |
2891 | ||
92740b24 JS |
2892 | /* |
2893 | * In the past, we if this was not an FCP-Target, we would | |
2894 | * unconditionally just jump to deleting the rport. | |
2895 | * However, rports can be used as node containers by the LLDD, | |
2896 | * and its not appropriate to just terminate the rport at the | |
2897 | * first sign of a loss in connectivity. The LLDD may want to | |
2898 | * send ELS traffic to re-validate the login. If the rport is | |
2899 | * immediately deleted, it makes it inappropriate for a node | |
2900 | * container. | |
2901 | * So... we now unconditionally wait dev_loss_tmo before | |
2902 | * destroying an rport. | |
2903 | */ | |
2904 | ||
aedf3497 JS |
2905 | rport->port_state = FC_PORTSTATE_BLOCKED; |
2906 | ||
2907 | rport->flags |= FC_RPORT_DEVLOSS_PENDING; | |
2908 | ||
2909 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2910 | ||
7525236d FT |
2911 | if (rport->roles & FC_PORT_ROLE_FCP_INITIATOR && |
2912 | shost->active_mode & MODE_TARGET) | |
2913 | fc_tgt_it_nexus_destroy(shost, (unsigned long)rport); | |
2914 | ||
19a7b4ae | 2915 | scsi_target_block(&rport->dev); |
1da177e4 | 2916 | |
0f29b966 JS |
2917 | /* see if we need to kill io faster than waiting for device loss */ |
2918 | if ((rport->fast_io_fail_tmo != -1) && | |
fff9d40c | 2919 | (rport->fast_io_fail_tmo < timeout)) |
0f29b966 JS |
2920 | fc_queue_devloss_work(shost, &rport->fail_io_work, |
2921 | rport->fast_io_fail_tmo * HZ); | |
2922 | ||
19a7b4ae | 2923 | /* cap the length the devices can be blocked until they are deleted */ |
aedf3497 | 2924 | fc_queue_devloss_work(shost, &rport->dev_loss_work, timeout * HZ); |
1da177e4 LT |
2925 | } |
2926 | EXPORT_SYMBOL(fc_remote_port_delete); | |
2927 | ||
2928 | /** | |
eb44820c | 2929 | * fc_remote_port_rolechg - notifies the fc transport that the roles on a remote may have changed. |
1da177e4 | 2930 | * @rport: The remote port that changed. |
eb44820c | 2931 | * @roles: New roles for this port. |
1da177e4 | 2932 | * |
eb44820c RL |
2933 | * Description: The LLDD calls this routine to notify the transport that the |
2934 | * roles on a remote port may have changed. The largest effect of this is | |
1da177e4 LT |
2935 | * if a port now becomes a FCP Target, it must be allocated a |
2936 | * scsi target id. If the port is no longer a FCP target, any | |
2937 | * scsi target id value assigned to it will persist in case the | |
2938 | * role changes back to include FCP Target. No changes in the scsi | |
2939 | * midlayer will be invoked if the role changes (in the expectation | |
2940 | * that the role will be resumed. If it doesn't normal error processing | |
2941 | * will take place). | |
2942 | * | |
2943 | * Should not be called from interrupt context. | |
2944 | * | |
2945 | * Notes: | |
2946 | * This routine assumes no locks are held on entry. | |
eb44820c | 2947 | */ |
1da177e4 LT |
2948 | void |
2949 | fc_remote_port_rolechg(struct fc_rport *rport, u32 roles) | |
2950 | { | |
2951 | struct Scsi_Host *shost = rport_to_shost(rport); | |
aedf3497 | 2952 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
1da177e4 LT |
2953 | unsigned long flags; |
2954 | int create = 0; | |
7525236d | 2955 | int ret; |
1da177e4 | 2956 | |
1da177e4 | 2957 | spin_lock_irqsave(shost->host_lock, flags); |
a53eb5e0 | 2958 | if (roles & FC_PORT_ROLE_FCP_TARGET) { |
19a7b4ae JSEC |
2959 | if (rport->scsi_target_id == -1) { |
2960 | rport->scsi_target_id = fc_host->next_target_id++; | |
2961 | create = 1; | |
a53eb5e0 | 2962 | } else if (!(rport->roles & FC_PORT_ROLE_FCP_TARGET)) |
19a7b4ae | 2963 | create = 1; |
7525236d FT |
2964 | } else if (shost->active_mode & MODE_TARGET) { |
2965 | ret = fc_tgt_it_nexus_create(shost, (unsigned long)rport, | |
2966 | (char *)&rport->node_name); | |
2967 | if (ret) | |
2968 | printk(KERN_ERR "FC Remore Port tgt nexus failed %d\n", | |
2969 | ret); | |
1da177e4 | 2970 | } |
1da177e4 | 2971 | |
19a7b4ae JSEC |
2972 | rport->roles = roles; |
2973 | ||
aedf3497 JS |
2974 | spin_unlock_irqrestore(shost->host_lock, flags); |
2975 | ||
19a7b4ae JSEC |
2976 | if (create) { |
2977 | /* | |
2978 | * There may have been a delete timer running on the | |
2979 | * port. Ensure that it is cancelled as we now know | |
2980 | * the port is an FCP Target. | |
2981 | * Note: we know the rport is exists and in an online | |
2982 | * state as the LLDD would not have had an rport | |
2983 | * reference to pass us. | |
2984 | * | |
2985 | * Take no action on the del_timer failure as the state | |
2986 | * machine state change will validate the | |
2987 | * transaction. | |
2988 | */ | |
0f29b966 JS |
2989 | if (!cancel_delayed_work(&rport->fail_io_work)) |
2990 | fc_flush_devloss(shost); | |
19a7b4ae | 2991 | if (!cancel_delayed_work(&rport->dev_loss_work)) |
aedf3497 JS |
2992 | fc_flush_devloss(shost); |
2993 | ||
2994 | spin_lock_irqsave(shost->host_lock, flags); | |
fff9d40c MC |
2995 | rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT | |
2996 | FC_RPORT_DEVLOSS_PENDING); | |
aedf3497 JS |
2997 | spin_unlock_irqrestore(shost->host_lock, flags); |
2998 | ||
2999 | /* ensure any stgt delete functions are done */ | |
3000 | fc_flush_work(shost); | |
19a7b4ae | 3001 | |
1da177e4 | 3002 | /* initiate a scan of the target */ |
aedf3497 JS |
3003 | spin_lock_irqsave(shost->host_lock, flags); |
3004 | rport->flags |= FC_RPORT_SCAN_PENDING; | |
1da177e4 | 3005 | scsi_queue_work(shost, &rport->scan_work); |
aedf3497 | 3006 | spin_unlock_irqrestore(shost->host_lock, flags); |
a0785edf | 3007 | scsi_target_unblock(&rport->dev); |
19a7b4ae | 3008 | } |
1da177e4 LT |
3009 | } |
3010 | EXPORT_SYMBOL(fc_remote_port_rolechg); | |
3011 | ||
3012 | /** | |
eb44820c | 3013 | * fc_timeout_deleted_rport - Timeout handler for a deleted remote port. |
92740b24 | 3014 | * @work: rport target that failed to reappear in the allotted time. |
eb44820c RL |
3015 | * |
3016 | * Description: An attempt to delete a remote port blocks, and if it fails | |
3017 | * to return in the allotted time this gets called. | |
3018 | */ | |
1da177e4 | 3019 | static void |
c4028958 | 3020 | fc_timeout_deleted_rport(struct work_struct *work) |
1da177e4 | 3021 | { |
c4028958 DH |
3022 | struct fc_rport *rport = |
3023 | container_of(work, struct fc_rport, dev_loss_work.work); | |
19a7b4ae | 3024 | struct Scsi_Host *shost = rport_to_shost(rport); |
4be98c0c | 3025 | struct fc_internal *i = to_fc_internal(shost->transportt); |
aedf3497 | 3026 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
19a7b4ae | 3027 | unsigned long flags; |
8798a694 | 3028 | int do_callback = 0; |
1da177e4 | 3029 | |
19a7b4ae | 3030 | spin_lock_irqsave(shost->host_lock, flags); |
1da177e4 | 3031 | |
aedf3497 JS |
3032 | rport->flags &= ~FC_RPORT_DEVLOSS_PENDING; |
3033 | ||
1da177e4 | 3034 | /* |
92740b24 JS |
3035 | * If the port is ONLINE, then it came back. If it was a SCSI |
3036 | * target, validate it still is. If not, tear down the | |
3037 | * scsi_target on it. | |
1da177e4 | 3038 | */ |
aedf3497 | 3039 | if ((rport->port_state == FC_PORTSTATE_ONLINE) && |
92740b24 | 3040 | (rport->scsi_target_id != -1) && |
a53eb5e0 | 3041 | !(rport->roles & FC_PORT_ROLE_FCP_TARGET)) { |
19a7b4ae | 3042 | dev_printk(KERN_ERR, &rport->dev, |
aedf3497 JS |
3043 | "blocked FC remote port time out: no longer" |
3044 | " a FCP target, removing starget\n"); | |
aedf3497 | 3045 | spin_unlock_irqrestore(shost->host_lock, flags); |
a0785edf JS |
3046 | scsi_target_unblock(&rport->dev); |
3047 | fc_queue_work(shost, &rport->stgt_delete_work); | |
19a7b4ae JSEC |
3048 | return; |
3049 | } | |
1da177e4 | 3050 | |
92740b24 | 3051 | /* NOOP state - we're flushing workq's */ |
19a7b4ae JSEC |
3052 | if (rport->port_state != FC_PORTSTATE_BLOCKED) { |
3053 | spin_unlock_irqrestore(shost->host_lock, flags); | |
3054 | dev_printk(KERN_ERR, &rport->dev, | |
92740b24 JS |
3055 | "blocked FC remote port time out: leaving" |
3056 | " rport%s alone\n", | |
3057 | (rport->scsi_target_id != -1) ? " and starget" : ""); | |
19a7b4ae JSEC |
3058 | return; |
3059 | } | |
1da177e4 | 3060 | |
92740b24 JS |
3061 | if ((fc_host->tgtid_bind_type == FC_TGTID_BIND_NONE) || |
3062 | (rport->scsi_target_id == -1)) { | |
aedf3497 JS |
3063 | list_del(&rport->peers); |
3064 | rport->port_state = FC_PORTSTATE_DELETED; | |
19a7b4ae | 3065 | dev_printk(KERN_ERR, &rport->dev, |
92740b24 JS |
3066 | "blocked FC remote port time out: removing" |
3067 | " rport%s\n", | |
3068 | (rport->scsi_target_id != -1) ? " and starget" : ""); | |
aedf3497 JS |
3069 | fc_queue_work(shost, &rport->rport_delete_work); |
3070 | spin_unlock_irqrestore(shost->host_lock, flags); | |
19a7b4ae JSEC |
3071 | return; |
3072 | } | |
1da177e4 | 3073 | |
19a7b4ae JSEC |
3074 | dev_printk(KERN_ERR, &rport->dev, |
3075 | "blocked FC remote port time out: removing target and " | |
3076 | "saving binding\n"); | |
3077 | ||
aedf3497 | 3078 | list_move_tail(&rport->peers, &fc_host->rport_bindings); |
1da177e4 LT |
3079 | |
3080 | /* | |
19a7b4ae JSEC |
3081 | * Note: We do not remove or clear the hostdata area. This allows |
3082 | * host-specific target data to persist along with the | |
3083 | * scsi_target_id. It's up to the host to manage it's hostdata area. | |
1da177e4 | 3084 | */ |
1da177e4 | 3085 | |
19a7b4ae JSEC |
3086 | /* |
3087 | * Reinitialize port attributes that may change if the port comes back. | |
3088 | */ | |
3089 | rport->maxframe_size = -1; | |
3090 | rport->supported_classes = FC_COS_UNSPECIFIED; | |
a53eb5e0 | 3091 | rport->roles = FC_PORT_ROLE_UNKNOWN; |
aedf3497 | 3092 | rport->port_state = FC_PORTSTATE_NOTPRESENT; |
fff9d40c | 3093 | rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT; |
1da177e4 | 3094 | |
f78badb1 JS |
3095 | /* |
3096 | * Pre-emptively kill I/O rather than waiting for the work queue | |
3097 | * item to teardown the starget. (FCOE libFC folks prefer this | |
3098 | * and to have the rport_port_id still set when it's done). | |
3099 | */ | |
3100 | spin_unlock_irqrestore(shost->host_lock, flags); | |
3101 | fc_terminate_rport_io(rport); | |
3102 | ||
8798a694 MR |
3103 | spin_lock_irqsave(shost->host_lock, flags); |
3104 | ||
3105 | if (rport->port_state == FC_PORTSTATE_NOTPRESENT) { /* still missing */ | |
f78badb1 | 3106 | |
8798a694 MR |
3107 | /* remove the identifiers that aren't used in the consisting binding */ |
3108 | switch (fc_host->tgtid_bind_type) { | |
3109 | case FC_TGTID_BIND_BY_WWPN: | |
3110 | rport->node_name = -1; | |
3111 | rport->port_id = -1; | |
3112 | break; | |
3113 | case FC_TGTID_BIND_BY_WWNN: | |
3114 | rport->port_name = -1; | |
3115 | rport->port_id = -1; | |
3116 | break; | |
3117 | case FC_TGTID_BIND_BY_ID: | |
3118 | rport->node_name = -1; | |
3119 | rport->port_name = -1; | |
3120 | break; | |
3121 | case FC_TGTID_BIND_NONE: /* to keep compiler happy */ | |
3122 | break; | |
3123 | } | |
3124 | ||
3125 | /* | |
3126 | * As this only occurs if the remote port (scsi target) | |
3127 | * went away and didn't come back - we'll remove | |
3128 | * all attached scsi devices. | |
3129 | */ | |
3130 | rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE; | |
3131 | fc_queue_work(shost, &rport->stgt_delete_work); | |
3132 | ||
3133 | do_callback = 1; | |
19a7b4ae JSEC |
3134 | } |
3135 | ||
8798a694 | 3136 | spin_unlock_irqrestore(shost->host_lock, flags); |
4be98c0c JS |
3137 | |
3138 | /* | |
3139 | * Notify the driver that the rport is now dead. The LLDD will | |
3140 | * also guarantee that any communication to the rport is terminated | |
3141 | * | |
3142 | * Note: we set the CALLBK_DONE flag above to correspond | |
3143 | */ | |
8798a694 | 3144 | if (do_callback && i->f->dev_loss_tmo_callbk) |
4be98c0c | 3145 | i->f->dev_loss_tmo_callbk(rport); |
1da177e4 | 3146 | } |
1da177e4 | 3147 | |
4be98c0c | 3148 | |
0f29b966 | 3149 | /** |
eb44820c | 3150 | * fc_timeout_fail_rport_io - Timeout handler for a fast io failing on a disconnected SCSI target. |
c4028958 | 3151 | * @work: rport to terminate io on. |
0f29b966 JS |
3152 | * |
3153 | * Notes: Only requests the failure of the io, not that all are flushed | |
3154 | * prior to returning. | |
eb44820c | 3155 | */ |
0f29b966 | 3156 | static void |
c4028958 | 3157 | fc_timeout_fail_rport_io(struct work_struct *work) |
0f29b966 | 3158 | { |
c4028958 DH |
3159 | struct fc_rport *rport = |
3160 | container_of(work, struct fc_rport, fail_io_work.work); | |
0f29b966 JS |
3161 | |
3162 | if (rport->port_state != FC_PORTSTATE_BLOCKED) | |
3163 | return; | |
3164 | ||
fff9d40c MC |
3165 | rport->flags |= FC_RPORT_FAST_FAIL_TIMEDOUT; |
3166 | fc_terminate_rport_io(rport); | |
0f29b966 JS |
3167 | } |
3168 | ||
1da177e4 LT |
3169 | /** |
3170 | * fc_scsi_scan_rport - called to perform a scsi scan on a remote port. | |
c4028958 | 3171 | * @work: remote port to be scanned. |
eb44820c | 3172 | */ |
1da177e4 | 3173 | static void |
c4028958 | 3174 | fc_scsi_scan_rport(struct work_struct *work) |
1da177e4 | 3175 | { |
c4028958 DH |
3176 | struct fc_rport *rport = |
3177 | container_of(work, struct fc_rport, scan_work); | |
aedf3497 | 3178 | struct Scsi_Host *shost = rport_to_shost(rport); |
03f002f7 | 3179 | struct fc_internal *i = to_fc_internal(shost->transportt); |
42e33148 JSEC |
3180 | unsigned long flags; |
3181 | ||
aedf3497 | 3182 | if ((rport->port_state == FC_PORTSTATE_ONLINE) && |
03f002f7 CS |
3183 | (rport->roles & FC_PORT_ROLE_FCP_TARGET) && |
3184 | !(i->f->disable_target_scan)) { | |
aedf3497 JS |
3185 | scsi_scan_target(&rport->dev, rport->channel, |
3186 | rport->scsi_target_id, SCAN_WILD_CARD, 1); | |
42e33148 | 3187 | } |
aedf3497 JS |
3188 | |
3189 | spin_lock_irqsave(shost->host_lock, flags); | |
3190 | rport->flags &= ~FC_RPORT_SCAN_PENDING; | |
42e33148 JSEC |
3191 | spin_unlock_irqrestore(shost->host_lock, flags); |
3192 | } | |
3193 | ||
65d430fa CS |
3194 | /** |
3195 | * fc_block_scsi_eh - Block SCSI eh thread for blocked fc_rport | |
3196 | * @cmnd: SCSI command that scsi_eh is trying to recover | |
3197 | * | |
3198 | * This routine can be called from a FC LLD scsi_eh callback. It | |
3199 | * blocks the scsi_eh thread until the fc_rport leaves the | |
3200 | * FC_PORTSTATE_BLOCKED. This is necessary to avoid the scsi_eh | |
3201 | * failing recovery actions for blocked rports which would lead to | |
3202 | * offlined SCSI devices. | |
3203 | */ | |
3204 | void fc_block_scsi_eh(struct scsi_cmnd *cmnd) | |
3205 | { | |
3206 | struct Scsi_Host *shost = cmnd->device->host; | |
3207 | struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); | |
3208 | unsigned long flags; | |
3209 | ||
3210 | spin_lock_irqsave(shost->host_lock, flags); | |
3211 | while (rport->port_state == FC_PORTSTATE_BLOCKED) { | |
3212 | spin_unlock_irqrestore(shost->host_lock, flags); | |
3213 | msleep(1000); | |
3214 | spin_lock_irqsave(shost->host_lock, flags); | |
3215 | } | |
3216 | spin_unlock_irqrestore(shost->host_lock, flags); | |
3217 | } | |
3218 | EXPORT_SYMBOL(fc_block_scsi_eh); | |
42e33148 | 3219 | |
a53eb5e0 | 3220 | /** |
a30c3f69 | 3221 | * fc_vport_setup - allocates and creates a FC virtual port. |
a53eb5e0 JS |
3222 | * @shost: scsi host the virtual port is connected to. |
3223 | * @channel: Channel on shost port connected to. | |
3224 | * @pdev: parent device for vport | |
3225 | * @ids: The world wide names, FC4 port roles, etc for | |
3226 | * the virtual port. | |
3227 | * @ret_vport: The pointer to the created vport. | |
3228 | * | |
3229 | * Allocates and creates the vport structure, calls the parent host | |
3230 | * to instantiate the vport, the completes w/ class and sysfs creation. | |
3231 | * | |
3232 | * Notes: | |
3233 | * This routine assumes no locks are held on entry. | |
eb44820c | 3234 | */ |
a53eb5e0 | 3235 | static int |
a30c3f69 | 3236 | fc_vport_setup(struct Scsi_Host *shost, int channel, struct device *pdev, |
a53eb5e0 JS |
3237 | struct fc_vport_identifiers *ids, struct fc_vport **ret_vport) |
3238 | { | |
3239 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); | |
3240 | struct fc_internal *fci = to_fc_internal(shost->transportt); | |
3241 | struct fc_vport *vport; | |
3242 | struct device *dev; | |
3243 | unsigned long flags; | |
3244 | size_t size; | |
3245 | int error; | |
3246 | ||
3247 | *ret_vport = NULL; | |
3248 | ||
3249 | if ( ! fci->f->vport_create) | |
3250 | return -ENOENT; | |
3251 | ||
3252 | size = (sizeof(struct fc_vport) + fci->f->dd_fcvport_size); | |
3253 | vport = kzalloc(size, GFP_KERNEL); | |
3254 | if (unlikely(!vport)) { | |
cadbd4a5 | 3255 | printk(KERN_ERR "%s: allocation failure\n", __func__); |
a53eb5e0 JS |
3256 | return -ENOMEM; |
3257 | } | |
3258 | ||
3259 | vport->vport_state = FC_VPORT_UNKNOWN; | |
3260 | vport->vport_last_state = FC_VPORT_UNKNOWN; | |
3261 | vport->node_name = ids->node_name; | |
3262 | vport->port_name = ids->port_name; | |
3263 | vport->roles = ids->roles; | |
3264 | vport->vport_type = ids->vport_type; | |
3265 | if (fci->f->dd_fcvport_size) | |
3266 | vport->dd_data = &vport[1]; | |
3267 | vport->shost = shost; | |
3268 | vport->channel = channel; | |
3269 | vport->flags = FC_VPORT_CREATING; | |
9ef3e4a4 | 3270 | INIT_WORK(&vport->vport_delete_work, fc_vport_sched_delete); |
a53eb5e0 JS |
3271 | |
3272 | spin_lock_irqsave(shost->host_lock, flags); | |
3273 | ||
3274 | if (fc_host->npiv_vports_inuse >= fc_host->max_npiv_vports) { | |
3275 | spin_unlock_irqrestore(shost->host_lock, flags); | |
3276 | kfree(vport); | |
3277 | return -ENOSPC; | |
3278 | } | |
3279 | fc_host->npiv_vports_inuse++; | |
3280 | vport->number = fc_host->next_vport_number++; | |
3281 | list_add_tail(&vport->peers, &fc_host->vports); | |
3282 | get_device(&shost->shost_gendev); /* for fc_host->vport list */ | |
3283 | ||
3284 | spin_unlock_irqrestore(shost->host_lock, flags); | |
3285 | ||
3286 | dev = &vport->dev; | |
3287 | device_initialize(dev); /* takes self reference */ | |
3288 | dev->parent = get_device(pdev); /* takes parent reference */ | |
3289 | dev->release = fc_vport_dev_release; | |
71610f55 KS |
3290 | dev_set_name(dev, "vport-%d:%d-%d", |
3291 | shost->host_no, channel, vport->number); | |
a53eb5e0 JS |
3292 | transport_setup_device(dev); |
3293 | ||
3294 | error = device_add(dev); | |
3295 | if (error) { | |
3296 | printk(KERN_ERR "FC Virtual Port device_add failed\n"); | |
3297 | goto delete_vport; | |
3298 | } | |
3299 | transport_add_device(dev); | |
3300 | transport_configure_device(dev); | |
3301 | ||
3302 | error = fci->f->vport_create(vport, ids->disable); | |
3303 | if (error) { | |
3304 | printk(KERN_ERR "FC Virtual Port LLDD Create failed\n"); | |
3305 | goto delete_vport_all; | |
3306 | } | |
3307 | ||
3308 | /* | |
3309 | * if the parent isn't the physical adapter's Scsi_Host, ensure | |
3310 | * the Scsi_Host at least contains ia symlink to the vport. | |
3311 | */ | |
3312 | if (pdev != &shost->shost_gendev) { | |
3313 | error = sysfs_create_link(&shost->shost_gendev.kobj, | |
71610f55 | 3314 | &dev->kobj, dev_name(dev)); |
a53eb5e0 JS |
3315 | if (error) |
3316 | printk(KERN_ERR | |
3317 | "%s: Cannot create vport symlinks for " | |
3318 | "%s, err=%d\n", | |
71610f55 | 3319 | __func__, dev_name(dev), error); |
a53eb5e0 JS |
3320 | } |
3321 | spin_lock_irqsave(shost->host_lock, flags); | |
3322 | vport->flags &= ~FC_VPORT_CREATING; | |
3323 | spin_unlock_irqrestore(shost->host_lock, flags); | |
3324 | ||
3325 | dev_printk(KERN_NOTICE, pdev, | |
71610f55 | 3326 | "%s created via shost%d channel %d\n", dev_name(dev), |
a53eb5e0 JS |
3327 | shost->host_no, channel); |
3328 | ||
3329 | *ret_vport = vport; | |
3330 | ||
3331 | return 0; | |
3332 | ||
3333 | delete_vport_all: | |
3334 | transport_remove_device(dev); | |
3335 | device_del(dev); | |
3336 | delete_vport: | |
3337 | transport_destroy_device(dev); | |
3338 | spin_lock_irqsave(shost->host_lock, flags); | |
3339 | list_del(&vport->peers); | |
3340 | put_device(&shost->shost_gendev); /* for fc_host->vport list */ | |
3341 | fc_host->npiv_vports_inuse--; | |
3342 | spin_unlock_irqrestore(shost->host_lock, flags); | |
3343 | put_device(dev->parent); | |
3344 | kfree(vport); | |
3345 | ||
3346 | return error; | |
3347 | } | |
3348 | ||
a30c3f69 AV |
3349 | /** |
3350 | * fc_vport_create - Admin App or LLDD requests creation of a vport | |
3351 | * @shost: scsi host the virtual port is connected to. | |
3352 | * @channel: channel on shost port connected to. | |
3353 | * @ids: The world wide names, FC4 port roles, etc for | |
3354 | * the virtual port. | |
3355 | * | |
3356 | * Notes: | |
3357 | * This routine assumes no locks are held on entry. | |
3358 | */ | |
3359 | struct fc_vport * | |
3360 | fc_vport_create(struct Scsi_Host *shost, int channel, | |
3361 | struct fc_vport_identifiers *ids) | |
3362 | { | |
3363 | int stat; | |
3364 | struct fc_vport *vport; | |
3365 | ||
3366 | stat = fc_vport_setup(shost, channel, &shost->shost_gendev, | |
3367 | ids, &vport); | |
3368 | return stat ? NULL : vport; | |
3369 | } | |
3370 | EXPORT_SYMBOL(fc_vport_create); | |
a53eb5e0 JS |
3371 | |
3372 | /** | |
3373 | * fc_vport_terminate - Admin App or LLDD requests termination of a vport | |
3374 | * @vport: fc_vport to be terminated | |
3375 | * | |
3376 | * Calls the LLDD vport_delete() function, then deallocates and removes | |
3377 | * the vport from the shost and object tree. | |
3378 | * | |
3379 | * Notes: | |
3380 | * This routine assumes no locks are held on entry. | |
eb44820c | 3381 | */ |
a53eb5e0 JS |
3382 | int |
3383 | fc_vport_terminate(struct fc_vport *vport) | |
3384 | { | |
3385 | struct Scsi_Host *shost = vport_to_shost(vport); | |
3386 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); | |
3387 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
3388 | struct device *dev = &vport->dev; | |
3389 | unsigned long flags; | |
3390 | int stat; | |
3391 | ||
a53eb5e0 JS |
3392 | if (i->f->vport_delete) |
3393 | stat = i->f->vport_delete(vport); | |
3394 | else | |
3395 | stat = -ENOENT; | |
3396 | ||
3397 | spin_lock_irqsave(shost->host_lock, flags); | |
3398 | vport->flags &= ~FC_VPORT_DELETING; | |
3399 | if (!stat) { | |
3400 | vport->flags |= FC_VPORT_DELETED; | |
3401 | list_del(&vport->peers); | |
3402 | fc_host->npiv_vports_inuse--; | |
3403 | put_device(&shost->shost_gendev); /* for fc_host->vport list */ | |
3404 | } | |
3405 | spin_unlock_irqrestore(shost->host_lock, flags); | |
3406 | ||
3407 | if (stat) | |
3408 | return stat; | |
3409 | ||
3410 | if (dev->parent != &shost->shost_gendev) | |
71610f55 | 3411 | sysfs_remove_link(&shost->shost_gendev.kobj, dev_name(dev)); |
a53eb5e0 JS |
3412 | transport_remove_device(dev); |
3413 | device_del(dev); | |
3414 | transport_destroy_device(dev); | |
3415 | ||
3416 | /* | |
3417 | * Removing our self-reference should mean our | |
3418 | * release function gets called, which will drop the remaining | |
3419 | * parent reference and free the data structure. | |
3420 | */ | |
3421 | put_device(dev); /* for self-reference */ | |
3422 | ||
3423 | return 0; /* SUCCESS */ | |
3424 | } | |
3425 | EXPORT_SYMBOL(fc_vport_terminate); | |
3426 | ||
9ef3e4a4 JS |
3427 | /** |
3428 | * fc_vport_sched_delete - workq-based delete request for a vport | |
9ef3e4a4 | 3429 | * @work: vport to be deleted. |
eb44820c | 3430 | */ |
9ef3e4a4 JS |
3431 | static void |
3432 | fc_vport_sched_delete(struct work_struct *work) | |
3433 | { | |
3434 | struct fc_vport *vport = | |
3435 | container_of(work, struct fc_vport, vport_delete_work); | |
3436 | int stat; | |
3437 | ||
3438 | stat = fc_vport_terminate(vport); | |
3439 | if (stat) | |
3440 | dev_printk(KERN_ERR, vport->dev.parent, | |
3441 | "%s: %s could not be deleted created via " | |
cadbd4a5 | 3442 | "shost%d channel %d - error %d\n", __func__, |
71610f55 | 3443 | dev_name(&vport->dev), vport->shost->host_no, |
9ef3e4a4 JS |
3444 | vport->channel, stat); |
3445 | } | |
3446 | ||
a53eb5e0 | 3447 | |
9e4f5e29 JS |
3448 | /* |
3449 | * BSG support | |
3450 | */ | |
3451 | ||
3452 | ||
3453 | /** | |
3454 | * fc_destroy_bsgjob - routine to teardown/delete a fc bsg job | |
3455 | * @job: fc_bsg_job that is to be torn down | |
3456 | */ | |
3457 | static void | |
3458 | fc_destroy_bsgjob(struct fc_bsg_job *job) | |
3459 | { | |
3460 | unsigned long flags; | |
3461 | ||
3462 | spin_lock_irqsave(&job->job_lock, flags); | |
3463 | if (job->ref_cnt) { | |
3464 | spin_unlock_irqrestore(&job->job_lock, flags); | |
3465 | return; | |
3466 | } | |
3467 | spin_unlock_irqrestore(&job->job_lock, flags); | |
3468 | ||
3469 | put_device(job->dev); /* release reference for the request */ | |
3470 | ||
3471 | kfree(job->request_payload.sg_list); | |
3472 | kfree(job->reply_payload.sg_list); | |
3473 | kfree(job); | |
3474 | } | |
3475 | ||
9e4f5e29 JS |
3476 | /** |
3477 | * fc_bsg_jobdone - completion routine for bsg requests that the LLD has | |
3478 | * completed | |
3479 | * @job: fc_bsg_job that is complete | |
3480 | */ | |
3481 | static void | |
3482 | fc_bsg_jobdone(struct fc_bsg_job *job) | |
3483 | { | |
3484 | struct request *req = job->req; | |
3485 | struct request *rsp = req->next_rq; | |
9e4f5e29 JS |
3486 | int err; |
3487 | ||
9e4f5e29 | 3488 | err = job->req->errors = job->reply->result; |
b5c6f776 | 3489 | |
9e4f5e29 JS |
3490 | if (err < 0) |
3491 | /* we're only returning the result field in the reply */ | |
3492 | job->req->sense_len = sizeof(uint32_t); | |
3493 | else | |
3494 | job->req->sense_len = job->reply_len; | |
3495 | ||
3496 | /* we assume all request payload was transferred, residual == 0 */ | |
3497 | req->resid_len = 0; | |
3498 | ||
3499 | if (rsp) { | |
3500 | WARN_ON(job->reply->reply_payload_rcv_len > rsp->resid_len); | |
3501 | ||
3502 | /* set reply (bidi) residual */ | |
3503 | rsp->resid_len -= min(job->reply->reply_payload_rcv_len, | |
3504 | rsp->resid_len); | |
3505 | } | |
b5c6f776 GM |
3506 | blk_complete_request(req); |
3507 | } | |
3508 | ||
3509 | /** | |
3510 | * fc_bsg_softirq_done - softirq done routine for destroying the bsg requests | |
fe5d20c8 | 3511 | * @rq: BSG request that holds the job to be destroyed |
b5c6f776 GM |
3512 | */ |
3513 | static void fc_bsg_softirq_done(struct request *rq) | |
3514 | { | |
3515 | struct fc_bsg_job *job = rq->special; | |
3516 | unsigned long flags; | |
9e4f5e29 | 3517 | |
b5c6f776 GM |
3518 | spin_lock_irqsave(&job->job_lock, flags); |
3519 | job->state_flags |= FC_RQST_STATE_DONE; | |
3520 | job->ref_cnt--; | |
3521 | spin_unlock_irqrestore(&job->job_lock, flags); | |
9e4f5e29 | 3522 | |
b5c6f776 | 3523 | blk_end_request_all(rq, rq->errors); |
9e4f5e29 JS |
3524 | fc_destroy_bsgjob(job); |
3525 | } | |
3526 | ||
9e4f5e29 JS |
3527 | /** |
3528 | * fc_bsg_job_timeout - handler for when a bsg request timesout | |
3529 | * @req: request that timed out | |
3530 | */ | |
3531 | static enum blk_eh_timer_return | |
3532 | fc_bsg_job_timeout(struct request *req) | |
3533 | { | |
3534 | struct fc_bsg_job *job = (void *) req->special; | |
3535 | struct Scsi_Host *shost = job->shost; | |
3536 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
3537 | unsigned long flags; | |
3538 | int err = 0, done = 0; | |
3539 | ||
3540 | if (job->rport && job->rport->port_state == FC_PORTSTATE_BLOCKED) | |
3541 | return BLK_EH_RESET_TIMER; | |
3542 | ||
3543 | spin_lock_irqsave(&job->job_lock, flags); | |
3544 | if (job->state_flags & FC_RQST_STATE_DONE) | |
3545 | done = 1; | |
3546 | else | |
3547 | job->ref_cnt++; | |
3548 | spin_unlock_irqrestore(&job->job_lock, flags); | |
3549 | ||
3550 | if (!done && i->f->bsg_timeout) { | |
3551 | /* call LLDD to abort the i/o as it has timed out */ | |
3552 | err = i->f->bsg_timeout(job); | |
b8f08645 SS |
3553 | if (err == -EAGAIN) { |
3554 | job->ref_cnt--; | |
3555 | return BLK_EH_RESET_TIMER; | |
3556 | } else if (err) | |
9e4f5e29 JS |
3557 | printk(KERN_ERR "ERROR: FC BSG request timeout - LLD " |
3558 | "abort failed with status %d\n", err); | |
3559 | } | |
3560 | ||
9e4f5e29 | 3561 | /* the blk_end_sync_io() doesn't check the error */ |
47e7e89e GM |
3562 | if (done) |
3563 | return BLK_EH_NOT_HANDLED; | |
3564 | else | |
3565 | return BLK_EH_HANDLED; | |
9e4f5e29 JS |
3566 | } |
3567 | ||
9e4f5e29 JS |
3568 | static int |
3569 | fc_bsg_map_buffer(struct fc_bsg_buffer *buf, struct request *req) | |
3570 | { | |
3571 | size_t sz = (sizeof(struct scatterlist) * req->nr_phys_segments); | |
3572 | ||
3573 | BUG_ON(!req->nr_phys_segments); | |
3574 | ||
3575 | buf->sg_list = kzalloc(sz, GFP_KERNEL); | |
3576 | if (!buf->sg_list) | |
3577 | return -ENOMEM; | |
3578 | sg_init_table(buf->sg_list, req->nr_phys_segments); | |
3579 | buf->sg_cnt = blk_rq_map_sg(req->q, req, buf->sg_list); | |
3580 | buf->payload_len = blk_rq_bytes(req); | |
3581 | return 0; | |
3582 | } | |
3583 | ||
3584 | ||
3585 | /** | |
3586 | * fc_req_to_bsgjob - Allocate/create the fc_bsg_job structure for the | |
3587 | * bsg request | |
3588 | * @shost: SCSI Host corresponding to the bsg object | |
3589 | * @rport: (optional) FC Remote Port corresponding to the bsg object | |
3590 | * @req: BSG request that needs a job structure | |
3591 | */ | |
3592 | static int | |
3593 | fc_req_to_bsgjob(struct Scsi_Host *shost, struct fc_rport *rport, | |
3594 | struct request *req) | |
3595 | { | |
3596 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
3597 | struct request *rsp = req->next_rq; | |
3598 | struct fc_bsg_job *job; | |
3599 | int ret; | |
3600 | ||
3601 | BUG_ON(req->special); | |
3602 | ||
3603 | job = kzalloc(sizeof(struct fc_bsg_job) + i->f->dd_bsg_size, | |
3604 | GFP_KERNEL); | |
3605 | if (!job) | |
3606 | return -ENOMEM; | |
3607 | ||
3608 | /* | |
3609 | * Note: this is a bit silly. | |
3610 | * The request gets formatted as a SGIO v4 ioctl request, which | |
3611 | * then gets reformatted as a blk request, which then gets | |
3612 | * reformatted as a fc bsg request. And on completion, we have | |
3613 | * to wrap return results such that SGIO v4 thinks it was a scsi | |
3614 | * status. I hope this was all worth it. | |
3615 | */ | |
3616 | ||
3617 | req->special = job; | |
3618 | job->shost = shost; | |
3619 | job->rport = rport; | |
3620 | job->req = req; | |
3621 | if (i->f->dd_bsg_size) | |
3622 | job->dd_data = (void *)&job[1]; | |
3623 | spin_lock_init(&job->job_lock); | |
3624 | job->request = (struct fc_bsg_request *)req->cmd; | |
3625 | job->request_len = req->cmd_len; | |
3626 | job->reply = req->sense; | |
3627 | job->reply_len = SCSI_SENSE_BUFFERSIZE; /* Size of sense buffer | |
3628 | * allocated */ | |
3629 | if (req->bio) { | |
3630 | ret = fc_bsg_map_buffer(&job->request_payload, req); | |
3631 | if (ret) | |
3632 | goto failjob_rls_job; | |
3633 | } | |
3634 | if (rsp && rsp->bio) { | |
3635 | ret = fc_bsg_map_buffer(&job->reply_payload, rsp); | |
3636 | if (ret) | |
3637 | goto failjob_rls_rqst_payload; | |
3638 | } | |
3639 | job->job_done = fc_bsg_jobdone; | |
3640 | if (rport) | |
3641 | job->dev = &rport->dev; | |
3642 | else | |
3643 | job->dev = &shost->shost_gendev; | |
3644 | get_device(job->dev); /* take a reference for the request */ | |
3645 | ||
3646 | job->ref_cnt = 1; | |
3647 | ||
3648 | return 0; | |
3649 | ||
3650 | ||
3651 | failjob_rls_rqst_payload: | |
3652 | kfree(job->request_payload.sg_list); | |
3653 | failjob_rls_job: | |
3654 | kfree(job); | |
3655 | return -ENOMEM; | |
3656 | } | |
3657 | ||
3658 | ||
3659 | enum fc_dispatch_result { | |
3660 | FC_DISPATCH_BREAK, /* on return, q is locked, break from q loop */ | |
3661 | FC_DISPATCH_LOCKED, /* on return, q is locked, continue on */ | |
3662 | FC_DISPATCH_UNLOCKED, /* on return, q is unlocked, continue on */ | |
3663 | }; | |
3664 | ||
3665 | ||
3666 | /** | |
3667 | * fc_bsg_host_dispatch - process fc host bsg requests and dispatch to LLDD | |
5415907a | 3668 | * @q: fc host request queue |
9e4f5e29 JS |
3669 | * @shost: scsi host rport attached to |
3670 | * @job: bsg job to be processed | |
3671 | */ | |
3672 | static enum fc_dispatch_result | |
3673 | fc_bsg_host_dispatch(struct request_queue *q, struct Scsi_Host *shost, | |
3674 | struct fc_bsg_job *job) | |
3675 | { | |
3676 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
3677 | int cmdlen = sizeof(uint32_t); /* start with length of msgcode */ | |
3678 | int ret; | |
3679 | ||
3680 | /* Validate the host command */ | |
3681 | switch (job->request->msgcode) { | |
3682 | case FC_BSG_HST_ADD_RPORT: | |
3683 | cmdlen += sizeof(struct fc_bsg_host_add_rport); | |
3684 | break; | |
3685 | ||
3686 | case FC_BSG_HST_DEL_RPORT: | |
3687 | cmdlen += sizeof(struct fc_bsg_host_del_rport); | |
3688 | break; | |
3689 | ||
3690 | case FC_BSG_HST_ELS_NOLOGIN: | |
3691 | cmdlen += sizeof(struct fc_bsg_host_els); | |
3692 | /* there better be a xmt and rcv payloads */ | |
3693 | if ((!job->request_payload.payload_len) || | |
3694 | (!job->reply_payload.payload_len)) { | |
3695 | ret = -EINVAL; | |
3696 | goto fail_host_msg; | |
3697 | } | |
3698 | break; | |
3699 | ||
3700 | case FC_BSG_HST_CT: | |
3701 | cmdlen += sizeof(struct fc_bsg_host_ct); | |
3702 | /* there better be xmt and rcv payloads */ | |
3703 | if ((!job->request_payload.payload_len) || | |
3704 | (!job->reply_payload.payload_len)) { | |
3705 | ret = -EINVAL; | |
3706 | goto fail_host_msg; | |
3707 | } | |
3708 | break; | |
3709 | ||
3710 | case FC_BSG_HST_VENDOR: | |
3711 | cmdlen += sizeof(struct fc_bsg_host_vendor); | |
3712 | if ((shost->hostt->vendor_id == 0L) || | |
3713 | (job->request->rqst_data.h_vendor.vendor_id != | |
3714 | shost->hostt->vendor_id)) { | |
3715 | ret = -ESRCH; | |
3716 | goto fail_host_msg; | |
3717 | } | |
3718 | break; | |
3719 | ||
3720 | default: | |
3721 | ret = -EBADR; | |
3722 | goto fail_host_msg; | |
3723 | } | |
3724 | ||
3725 | /* check if we really have all the request data needed */ | |
3726 | if (job->request_len < cmdlen) { | |
3727 | ret = -ENOMSG; | |
3728 | goto fail_host_msg; | |
3729 | } | |
3730 | ||
3731 | ret = i->f->bsg_request(job); | |
3732 | if (!ret) | |
3733 | return FC_DISPATCH_UNLOCKED; | |
3734 | ||
3735 | fail_host_msg: | |
3736 | /* return the errno failure code as the only status */ | |
3737 | BUG_ON(job->reply_len < sizeof(uint32_t)); | |
61ec33eb | 3738 | job->reply->reply_payload_rcv_len = 0; |
9e4f5e29 JS |
3739 | job->reply->result = ret; |
3740 | job->reply_len = sizeof(uint32_t); | |
3741 | fc_bsg_jobdone(job); | |
3742 | return FC_DISPATCH_UNLOCKED; | |
3743 | } | |
3744 | ||
3745 | ||
3746 | /* | |
3747 | * fc_bsg_goose_queue - restart rport queue in case it was stopped | |
3748 | * @rport: rport to be restarted | |
3749 | */ | |
3750 | static void | |
3751 | fc_bsg_goose_queue(struct fc_rport *rport) | |
3752 | { | |
3753 | int flagset; | |
39562e78 | 3754 | unsigned long flags; |
9e4f5e29 JS |
3755 | |
3756 | if (!rport->rqst_q) | |
3757 | return; | |
3758 | ||
3759 | get_device(&rport->dev); | |
3760 | ||
39562e78 | 3761 | spin_lock_irqsave(rport->rqst_q->queue_lock, flags); |
9e4f5e29 JS |
3762 | flagset = test_bit(QUEUE_FLAG_REENTER, &rport->rqst_q->queue_flags) && |
3763 | !test_bit(QUEUE_FLAG_REENTER, &rport->rqst_q->queue_flags); | |
3764 | if (flagset) | |
3765 | queue_flag_set(QUEUE_FLAG_REENTER, rport->rqst_q); | |
3766 | __blk_run_queue(rport->rqst_q); | |
3767 | if (flagset) | |
3768 | queue_flag_clear(QUEUE_FLAG_REENTER, rport->rqst_q); | |
39562e78 | 3769 | spin_unlock_irqrestore(rport->rqst_q->queue_lock, flags); |
9e4f5e29 JS |
3770 | |
3771 | put_device(&rport->dev); | |
3772 | } | |
3773 | ||
3774 | ||
3775 | /** | |
3776 | * fc_bsg_rport_dispatch - process rport bsg requests and dispatch to LLDD | |
5415907a | 3777 | * @q: rport request queue |
9e4f5e29 JS |
3778 | * @shost: scsi host rport attached to |
3779 | * @rport: rport request destined to | |
3780 | * @job: bsg job to be processed | |
3781 | */ | |
3782 | static enum fc_dispatch_result | |
3783 | fc_bsg_rport_dispatch(struct request_queue *q, struct Scsi_Host *shost, | |
3784 | struct fc_rport *rport, struct fc_bsg_job *job) | |
3785 | { | |
3786 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
3787 | int cmdlen = sizeof(uint32_t); /* start with length of msgcode */ | |
3788 | int ret; | |
3789 | ||
3790 | /* Validate the rport command */ | |
3791 | switch (job->request->msgcode) { | |
3792 | case FC_BSG_RPT_ELS: | |
3793 | cmdlen += sizeof(struct fc_bsg_rport_els); | |
3794 | goto check_bidi; | |
3795 | ||
3796 | case FC_BSG_RPT_CT: | |
3797 | cmdlen += sizeof(struct fc_bsg_rport_ct); | |
3798 | check_bidi: | |
3799 | /* there better be xmt and rcv payloads */ | |
3800 | if ((!job->request_payload.payload_len) || | |
3801 | (!job->reply_payload.payload_len)) { | |
3802 | ret = -EINVAL; | |
3803 | goto fail_rport_msg; | |
3804 | } | |
3805 | break; | |
3806 | default: | |
3807 | ret = -EBADR; | |
3808 | goto fail_rport_msg; | |
3809 | } | |
3810 | ||
3811 | /* check if we really have all the request data needed */ | |
3812 | if (job->request_len < cmdlen) { | |
3813 | ret = -ENOMSG; | |
3814 | goto fail_rport_msg; | |
3815 | } | |
3816 | ||
3817 | ret = i->f->bsg_request(job); | |
3818 | if (!ret) | |
3819 | return FC_DISPATCH_UNLOCKED; | |
3820 | ||
3821 | fail_rport_msg: | |
3822 | /* return the errno failure code as the only status */ | |
3823 | BUG_ON(job->reply_len < sizeof(uint32_t)); | |
61ec33eb | 3824 | job->reply->reply_payload_rcv_len = 0; |
9e4f5e29 JS |
3825 | job->reply->result = ret; |
3826 | job->reply_len = sizeof(uint32_t); | |
3827 | fc_bsg_jobdone(job); | |
3828 | return FC_DISPATCH_UNLOCKED; | |
3829 | } | |
3830 | ||
3831 | ||
3832 | /** | |
3833 | * fc_bsg_request_handler - generic handler for bsg requests | |
3834 | * @q: request queue to manage | |
3835 | * @shost: Scsi_Host related to the bsg object | |
3836 | * @rport: FC remote port related to the bsg object (optional) | |
3837 | * @dev: device structure for bsg object | |
3838 | */ | |
3839 | static void | |
3840 | fc_bsg_request_handler(struct request_queue *q, struct Scsi_Host *shost, | |
3841 | struct fc_rport *rport, struct device *dev) | |
3842 | { | |
3843 | struct request *req; | |
3844 | struct fc_bsg_job *job; | |
3845 | enum fc_dispatch_result ret; | |
3846 | ||
3847 | if (!get_device(dev)) | |
3848 | return; | |
3849 | ||
3850 | while (!blk_queue_plugged(q)) { | |
2bc1c59d MC |
3851 | if (rport && (rport->port_state == FC_PORTSTATE_BLOCKED) && |
3852 | !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)) | |
3853 | break; | |
9e4f5e29 JS |
3854 | |
3855 | req = blk_fetch_request(q); | |
3856 | if (!req) | |
3857 | break; | |
3858 | ||
3859 | if (rport && (rport->port_state != FC_PORTSTATE_ONLINE)) { | |
3860 | req->errors = -ENXIO; | |
3861 | spin_unlock_irq(q->queue_lock); | |
d88a714b | 3862 | blk_end_request_all(req, -ENXIO); |
9e4f5e29 JS |
3863 | spin_lock_irq(q->queue_lock); |
3864 | continue; | |
3865 | } | |
3866 | ||
3867 | spin_unlock_irq(q->queue_lock); | |
3868 | ||
3869 | ret = fc_req_to_bsgjob(shost, rport, req); | |
3870 | if (ret) { | |
3871 | req->errors = ret; | |
d88a714b | 3872 | blk_end_request_all(req, ret); |
9e4f5e29 JS |
3873 | spin_lock_irq(q->queue_lock); |
3874 | continue; | |
3875 | } | |
3876 | ||
3877 | job = req->special; | |
3878 | ||
3879 | /* check if we have the msgcode value at least */ | |
3880 | if (job->request_len < sizeof(uint32_t)) { | |
3881 | BUG_ON(job->reply_len < sizeof(uint32_t)); | |
61ec33eb | 3882 | job->reply->reply_payload_rcv_len = 0; |
9e4f5e29 JS |
3883 | job->reply->result = -ENOMSG; |
3884 | job->reply_len = sizeof(uint32_t); | |
3885 | fc_bsg_jobdone(job); | |
3886 | spin_lock_irq(q->queue_lock); | |
3887 | continue; | |
3888 | } | |
3889 | ||
3890 | /* the dispatch routines will unlock the queue_lock */ | |
3891 | if (rport) | |
3892 | ret = fc_bsg_rport_dispatch(q, shost, rport, job); | |
3893 | else | |
3894 | ret = fc_bsg_host_dispatch(q, shost, job); | |
3895 | ||
3896 | /* did dispatcher hit state that can't process any more */ | |
3897 | if (ret == FC_DISPATCH_BREAK) | |
3898 | break; | |
3899 | ||
3900 | /* did dispatcher had released the lock */ | |
3901 | if (ret == FC_DISPATCH_UNLOCKED) | |
3902 | spin_lock_irq(q->queue_lock); | |
3903 | } | |
3904 | ||
3905 | spin_unlock_irq(q->queue_lock); | |
3906 | put_device(dev); | |
3907 | spin_lock_irq(q->queue_lock); | |
3908 | } | |
3909 | ||
3910 | ||
3911 | /** | |
3912 | * fc_bsg_host_handler - handler for bsg requests for a fc host | |
3913 | * @q: fc host request queue | |
3914 | */ | |
3915 | static void | |
3916 | fc_bsg_host_handler(struct request_queue *q) | |
3917 | { | |
3918 | struct Scsi_Host *shost = q->queuedata; | |
3919 | ||
3920 | fc_bsg_request_handler(q, shost, NULL, &shost->shost_gendev); | |
3921 | } | |
3922 | ||
3923 | ||
3924 | /** | |
3925 | * fc_bsg_rport_handler - handler for bsg requests for a fc rport | |
3926 | * @q: rport request queue | |
3927 | */ | |
3928 | static void | |
3929 | fc_bsg_rport_handler(struct request_queue *q) | |
3930 | { | |
3931 | struct fc_rport *rport = q->queuedata; | |
3932 | struct Scsi_Host *shost = rport_to_shost(rport); | |
3933 | ||
3934 | fc_bsg_request_handler(q, shost, rport, &rport->dev); | |
3935 | } | |
3936 | ||
3937 | ||
3938 | /** | |
3939 | * fc_bsg_hostadd - Create and add the bsg hooks so we can receive requests | |
3940 | * @shost: shost for fc_host | |
3941 | * @fc_host: fc_host adding the structures to | |
3942 | */ | |
3943 | static int | |
3944 | fc_bsg_hostadd(struct Scsi_Host *shost, struct fc_host_attrs *fc_host) | |
3945 | { | |
3946 | struct device *dev = &shost->shost_gendev; | |
3947 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
3948 | struct request_queue *q; | |
3949 | int err; | |
3c559ea8 | 3950 | char bsg_name[20]; |
9e4f5e29 JS |
3951 | |
3952 | fc_host->rqst_q = NULL; | |
3953 | ||
3954 | if (!i->f->bsg_request) | |
3955 | return -ENOTSUPP; | |
3956 | ||
3957 | snprintf(bsg_name, sizeof(bsg_name), | |
3958 | "fc_host%d", shost->host_no); | |
3959 | ||
3960 | q = __scsi_alloc_queue(shost, fc_bsg_host_handler); | |
3961 | if (!q) { | |
3962 | printk(KERN_ERR "fc_host%d: bsg interface failed to " | |
3963 | "initialize - no request queue\n", | |
3964 | shost->host_no); | |
3965 | return -ENOMEM; | |
3966 | } | |
3967 | ||
3968 | q->queuedata = shost; | |
3969 | queue_flag_set_unlocked(QUEUE_FLAG_BIDI, q); | |
b5c6f776 | 3970 | blk_queue_softirq_done(q, fc_bsg_softirq_done); |
9e4f5e29 JS |
3971 | blk_queue_rq_timed_out(q, fc_bsg_job_timeout); |
3972 | blk_queue_rq_timeout(q, FC_DEFAULT_BSG_TIMEOUT); | |
3973 | ||
3974 | err = bsg_register_queue(q, dev, bsg_name, NULL); | |
3975 | if (err) { | |
3976 | printk(KERN_ERR "fc_host%d: bsg interface failed to " | |
3977 | "initialize - register queue\n", | |
3978 | shost->host_no); | |
3979 | blk_cleanup_queue(q); | |
3980 | return err; | |
3981 | } | |
3982 | ||
3983 | fc_host->rqst_q = q; | |
3984 | return 0; | |
3985 | } | |
3986 | ||
3987 | ||
3988 | /** | |
3989 | * fc_bsg_rportadd - Create and add the bsg hooks so we can receive requests | |
3990 | * @shost: shost that rport is attached to | |
3991 | * @rport: rport that the bsg hooks are being attached to | |
3992 | */ | |
3993 | static int | |
3994 | fc_bsg_rportadd(struct Scsi_Host *shost, struct fc_rport *rport) | |
3995 | { | |
3996 | struct device *dev = &rport->dev; | |
3997 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
3998 | struct request_queue *q; | |
3999 | int err; | |
4000 | ||
4001 | rport->rqst_q = NULL; | |
4002 | ||
4003 | if (!i->f->bsg_request) | |
4004 | return -ENOTSUPP; | |
4005 | ||
4006 | q = __scsi_alloc_queue(shost, fc_bsg_rport_handler); | |
4007 | if (!q) { | |
4008 | printk(KERN_ERR "%s: bsg interface failed to " | |
4009 | "initialize - no request queue\n", | |
4010 | dev->kobj.name); | |
4011 | return -ENOMEM; | |
4012 | } | |
4013 | ||
4014 | q->queuedata = rport; | |
4015 | queue_flag_set_unlocked(QUEUE_FLAG_BIDI, q); | |
b5c6f776 | 4016 | blk_queue_softirq_done(q, fc_bsg_softirq_done); |
9e4f5e29 JS |
4017 | blk_queue_rq_timed_out(q, fc_bsg_job_timeout); |
4018 | blk_queue_rq_timeout(q, BLK_DEFAULT_SG_TIMEOUT); | |
4019 | ||
4020 | err = bsg_register_queue(q, dev, NULL, NULL); | |
4021 | if (err) { | |
4022 | printk(KERN_ERR "%s: bsg interface failed to " | |
4023 | "initialize - register queue\n", | |
4024 | dev->kobj.name); | |
4025 | blk_cleanup_queue(q); | |
4026 | return err; | |
4027 | } | |
4028 | ||
4029 | rport->rqst_q = q; | |
4030 | return 0; | |
4031 | } | |
4032 | ||
4033 | ||
4034 | /** | |
4035 | * fc_bsg_remove - Deletes the bsg hooks on fchosts/rports | |
4036 | * @q: the request_queue that is to be torn down. | |
4037 | */ | |
4038 | static void | |
4039 | fc_bsg_remove(struct request_queue *q) | |
4040 | { | |
4041 | if (q) { | |
4042 | bsg_unregister_queue(q); | |
4043 | blk_cleanup_queue(q); | |
4044 | } | |
4045 | } | |
4046 | ||
4047 | ||
9ef3e4a4 JS |
4048 | /* Original Author: Martin Hicks */ |
4049 | MODULE_AUTHOR("James Smart"); | |
1da177e4 LT |
4050 | MODULE_DESCRIPTION("FC Transport Attributes"); |
4051 | MODULE_LICENSE("GPL"); | |
4052 | ||
4053 | module_init(fc_transport_init); | |
4054 | module_exit(fc_transport_exit); |