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> |
ecc30990 | 32 | #include <linux/kernel.h> |
1da177e4 LT |
33 | #include <scsi/scsi_device.h> |
34 | #include <scsi/scsi_host.h> | |
35 | #include <scsi/scsi_transport.h> | |
36 | #include <scsi/scsi_transport_fc.h> | |
c829c394 | 37 | #include <scsi/scsi_cmnd.h> |
84314fd4 JS |
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 | |
43ca910a MC |
54 | /* |
55 | * Module Parameters | |
56 | */ | |
57 | ||
58 | /* | |
59 | * dev_loss_tmo: the default number of seconds that the FC transport | |
60 | * should insulate the loss of a remote port. | |
61 | * The maximum will be capped by the value of SCSI_DEVICE_BLOCK_MAX_TIMEOUT. | |
62 | */ | |
63 | static unsigned int fc_dev_loss_tmo = 60; /* seconds */ | |
64 | ||
65 | module_param_named(dev_loss_tmo, fc_dev_loss_tmo, uint, S_IRUGO|S_IWUSR); | |
66 | MODULE_PARM_DESC(dev_loss_tmo, | |
67 | "Maximum number of seconds that the FC transport should" | |
68 | " insulate the loss of a remote port. Once this value is" | |
69 | " exceeded, the scsi target is removed. Value should be" | |
70 | " between 1 and SCSI_DEVICE_BLOCK_MAX_TIMEOUT if" | |
71 | " fast_io_fail_tmo is not set."); | |
72 | ||
1da177e4 LT |
73 | /* |
74 | * Redefine so that we can have same named attributes in the | |
75 | * sdev/starget/host objects. | |
76 | */ | |
ee959b00 TJ |
77 | #define FC_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \ |
78 | struct device_attribute device_attr_##_prefix##_##_name = \ | |
1da177e4 LT |
79 | __ATTR(_name,_mode,_show,_store) |
80 | ||
81 | #define fc_enum_name_search(title, table_type, table) \ | |
82 | static const char *get_fc_##title##_name(enum table_type table_key) \ | |
83 | { \ | |
84 | int i; \ | |
85 | char *name = NULL; \ | |
86 | \ | |
6391a113 | 87 | for (i = 0; i < ARRAY_SIZE(table); i++) { \ |
1da177e4 LT |
88 | if (table[i].value == table_key) { \ |
89 | name = table[i].name; \ | |
90 | break; \ | |
91 | } \ | |
92 | } \ | |
93 | return name; \ | |
94 | } | |
95 | ||
96 | #define fc_enum_name_match(title, table_type, table) \ | |
97 | static int get_fc_##title##_match(const char *table_key, \ | |
98 | enum table_type *value) \ | |
99 | { \ | |
100 | int i; \ | |
101 | \ | |
6391a113 | 102 | for (i = 0; i < ARRAY_SIZE(table); i++) { \ |
1da177e4 LT |
103 | if (strncmp(table_key, table[i].name, \ |
104 | table[i].matchlen) == 0) { \ | |
105 | *value = table[i].value; \ | |
106 | return 0; /* success */ \ | |
107 | } \ | |
108 | } \ | |
109 | return 1; /* failure */ \ | |
110 | } | |
111 | ||
112 | ||
113 | /* Convert fc_port_type values to ascii string name */ | |
114 | static struct { | |
115 | enum fc_port_type value; | |
116 | char *name; | |
117 | } fc_port_type_names[] = { | |
118 | { FC_PORTTYPE_UNKNOWN, "Unknown" }, | |
119 | { FC_PORTTYPE_OTHER, "Other" }, | |
120 | { FC_PORTTYPE_NOTPRESENT, "Not Present" }, | |
121 | { FC_PORTTYPE_NPORT, "NPort (fabric via point-to-point)" }, | |
122 | { FC_PORTTYPE_NLPORT, "NLPort (fabric via loop)" }, | |
123 | { FC_PORTTYPE_LPORT, "LPort (private loop)" }, | |
951948a3 | 124 | { FC_PORTTYPE_PTP, "Point-To-Point (direct nport connection)" }, |
a53eb5e0 | 125 | { FC_PORTTYPE_NPIV, "NPIV VPORT" }, |
1da177e4 LT |
126 | }; |
127 | fc_enum_name_search(port_type, fc_port_type, fc_port_type_names) | |
128 | #define FC_PORTTYPE_MAX_NAMELEN 50 | |
129 | ||
a53eb5e0 JS |
130 | /* Reuse fc_port_type enum function for vport_type */ |
131 | #define get_fc_vport_type_name get_fc_port_type_name | |
132 | ||
1da177e4 | 133 | |
84314fd4 JS |
134 | /* Convert fc_host_event_code values to ascii string name */ |
135 | static const struct { | |
136 | enum fc_host_event_code value; | |
137 | char *name; | |
138 | } fc_host_event_code_names[] = { | |
139 | { FCH_EVT_LIP, "lip" }, | |
140 | { FCH_EVT_LINKUP, "link_up" }, | |
141 | { FCH_EVT_LINKDOWN, "link_down" }, | |
142 | { FCH_EVT_LIPRESET, "lip_reset" }, | |
143 | { FCH_EVT_RSCN, "rscn" }, | |
144 | { FCH_EVT_ADAPTER_CHANGE, "adapter_chg" }, | |
145 | { FCH_EVT_PORT_UNKNOWN, "port_unknown" }, | |
146 | { FCH_EVT_PORT_ONLINE, "port_online" }, | |
147 | { FCH_EVT_PORT_OFFLINE, "port_offline" }, | |
148 | { FCH_EVT_PORT_FABRIC, "port_fabric" }, | |
149 | { FCH_EVT_LINK_UNKNOWN, "link_unknown" }, | |
150 | { FCH_EVT_VENDOR_UNIQUE, "vendor_unique" }, | |
151 | }; | |
152 | fc_enum_name_search(host_event_code, fc_host_event_code, | |
153 | fc_host_event_code_names) | |
154 | #define FC_HOST_EVENT_CODE_MAX_NAMELEN 30 | |
155 | ||
156 | ||
1da177e4 LT |
157 | /* Convert fc_port_state values to ascii string name */ |
158 | static struct { | |
159 | enum fc_port_state value; | |
160 | char *name; | |
161 | } fc_port_state_names[] = { | |
162 | { FC_PORTSTATE_UNKNOWN, "Unknown" }, | |
163 | { FC_PORTSTATE_NOTPRESENT, "Not Present" }, | |
164 | { FC_PORTSTATE_ONLINE, "Online" }, | |
165 | { FC_PORTSTATE_OFFLINE, "Offline" }, | |
166 | { FC_PORTSTATE_BLOCKED, "Blocked" }, | |
167 | { FC_PORTSTATE_BYPASSED, "Bypassed" }, | |
168 | { FC_PORTSTATE_DIAGNOSTICS, "Diagnostics" }, | |
169 | { FC_PORTSTATE_LINKDOWN, "Linkdown" }, | |
170 | { FC_PORTSTATE_ERROR, "Error" }, | |
171 | { FC_PORTSTATE_LOOPBACK, "Loopback" }, | |
42e33148 | 172 | { FC_PORTSTATE_DELETED, "Deleted" }, |
1da177e4 LT |
173 | }; |
174 | fc_enum_name_search(port_state, fc_port_state, fc_port_state_names) | |
175 | #define FC_PORTSTATE_MAX_NAMELEN 20 | |
176 | ||
177 | ||
a53eb5e0 JS |
178 | /* Convert fc_vport_state values to ascii string name */ |
179 | static struct { | |
180 | enum fc_vport_state value; | |
181 | char *name; | |
182 | } fc_vport_state_names[] = { | |
183 | { FC_VPORT_UNKNOWN, "Unknown" }, | |
184 | { FC_VPORT_ACTIVE, "Active" }, | |
185 | { FC_VPORT_DISABLED, "Disabled" }, | |
186 | { FC_VPORT_LINKDOWN, "Linkdown" }, | |
187 | { FC_VPORT_INITIALIZING, "Initializing" }, | |
188 | { FC_VPORT_NO_FABRIC_SUPP, "No Fabric Support" }, | |
189 | { FC_VPORT_NO_FABRIC_RSCS, "No Fabric Resources" }, | |
190 | { FC_VPORT_FABRIC_LOGOUT, "Fabric Logout" }, | |
191 | { FC_VPORT_FABRIC_REJ_WWN, "Fabric Rejected WWN" }, | |
192 | { FC_VPORT_FAILED, "VPort Failed" }, | |
193 | }; | |
194 | fc_enum_name_search(vport_state, fc_vport_state, fc_vport_state_names) | |
195 | #define FC_VPORTSTATE_MAX_NAMELEN 24 | |
196 | ||
197 | /* Reuse fc_vport_state enum function for vport_last_state */ | |
198 | #define get_fc_vport_last_state_name get_fc_vport_state_name | |
199 | ||
200 | ||
1da177e4 | 201 | /* Convert fc_tgtid_binding_type values to ascii string name */ |
0ad78200 | 202 | static const struct { |
1da177e4 LT |
203 | enum fc_tgtid_binding_type value; |
204 | char *name; | |
205 | int matchlen; | |
206 | } fc_tgtid_binding_type_names[] = { | |
207 | { FC_TGTID_BIND_NONE, "none", 4 }, | |
208 | { FC_TGTID_BIND_BY_WWPN, "wwpn (World Wide Port Name)", 4 }, | |
209 | { FC_TGTID_BIND_BY_WWNN, "wwnn (World Wide Node Name)", 4 }, | |
210 | { FC_TGTID_BIND_BY_ID, "port_id (FC Address)", 7 }, | |
211 | }; | |
212 | fc_enum_name_search(tgtid_bind_type, fc_tgtid_binding_type, | |
213 | fc_tgtid_binding_type_names) | |
214 | fc_enum_name_match(tgtid_bind_type, fc_tgtid_binding_type, | |
215 | fc_tgtid_binding_type_names) | |
216 | #define FC_BINDTYPE_MAX_NAMELEN 30 | |
217 | ||
218 | ||
219 | #define fc_bitfield_name_search(title, table) \ | |
220 | static ssize_t \ | |
221 | get_fc_##title##_names(u32 table_key, char *buf) \ | |
222 | { \ | |
223 | char *prefix = ""; \ | |
224 | ssize_t len = 0; \ | |
225 | int i; \ | |
226 | \ | |
6391a113 | 227 | for (i = 0; i < ARRAY_SIZE(table); i++) { \ |
1da177e4 LT |
228 | if (table[i].value & table_key) { \ |
229 | len += sprintf(buf + len, "%s%s", \ | |
230 | prefix, table[i].name); \ | |
231 | prefix = ", "; \ | |
232 | } \ | |
233 | } \ | |
234 | len += sprintf(buf + len, "\n"); \ | |
235 | return len; \ | |
236 | } | |
237 | ||
238 | ||
239 | /* Convert FC_COS bit values to ascii string name */ | |
0ad78200 | 240 | static const struct { |
1da177e4 LT |
241 | u32 value; |
242 | char *name; | |
243 | } fc_cos_names[] = { | |
244 | { FC_COS_CLASS1, "Class 1" }, | |
245 | { FC_COS_CLASS2, "Class 2" }, | |
246 | { FC_COS_CLASS3, "Class 3" }, | |
247 | { FC_COS_CLASS4, "Class 4" }, | |
248 | { FC_COS_CLASS6, "Class 6" }, | |
249 | }; | |
250 | fc_bitfield_name_search(cos, fc_cos_names) | |
251 | ||
252 | ||
253 | /* Convert FC_PORTSPEED bit values to ascii string name */ | |
0ad78200 | 254 | static const struct { |
1da177e4 LT |
255 | u32 value; |
256 | char *name; | |
257 | } fc_port_speed_names[] = { | |
258 | { FC_PORTSPEED_1GBIT, "1 Gbit" }, | |
259 | { FC_PORTSPEED_2GBIT, "2 Gbit" }, | |
260 | { FC_PORTSPEED_4GBIT, "4 Gbit" }, | |
261 | { FC_PORTSPEED_10GBIT, "10 Gbit" }, | |
c3d2350a JS |
262 | { FC_PORTSPEED_8GBIT, "8 Gbit" }, |
263 | { FC_PORTSPEED_16GBIT, "16 Gbit" }, | |
1da177e4 LT |
264 | { FC_PORTSPEED_NOT_NEGOTIATED, "Not Negotiated" }, |
265 | }; | |
266 | fc_bitfield_name_search(port_speed, fc_port_speed_names) | |
267 | ||
268 | ||
269 | static int | |
270 | show_fc_fc4s (char *buf, u8 *fc4_list) | |
271 | { | |
272 | int i, len=0; | |
273 | ||
274 | for (i = 0; i < FC_FC4_LIST_SIZE; i++, fc4_list++) | |
275 | len += sprintf(buf + len , "0x%02x ", *fc4_list); | |
276 | len += sprintf(buf + len, "\n"); | |
277 | return len; | |
278 | } | |
279 | ||
280 | ||
a53eb5e0 | 281 | /* Convert FC_PORT_ROLE bit values to ascii string name */ |
0ad78200 | 282 | static const struct { |
1da177e4 LT |
283 | u32 value; |
284 | char *name; | |
a53eb5e0 JS |
285 | } fc_port_role_names[] = { |
286 | { FC_PORT_ROLE_FCP_TARGET, "FCP Target" }, | |
287 | { FC_PORT_ROLE_FCP_INITIATOR, "FCP Initiator" }, | |
288 | { FC_PORT_ROLE_IP_PORT, "IP Port" }, | |
1da177e4 | 289 | }; |
a53eb5e0 | 290 | fc_bitfield_name_search(port_roles, fc_port_role_names) |
1da177e4 LT |
291 | |
292 | /* | |
293 | * Define roles that are specific to port_id. Values are relative to ROLE_MASK. | |
294 | */ | |
295 | #define FC_WELLKNOWN_PORTID_MASK 0xfffff0 | |
296 | #define FC_WELLKNOWN_ROLE_MASK 0x00000f | |
297 | #define FC_FPORT_PORTID 0x00000e | |
298 | #define FC_FABCTLR_PORTID 0x00000d | |
299 | #define FC_DIRSRVR_PORTID 0x00000c | |
300 | #define FC_TIMESRVR_PORTID 0x00000b | |
301 | #define FC_MGMTSRVR_PORTID 0x00000a | |
302 | ||
303 | ||
c4028958 DH |
304 | static void fc_timeout_deleted_rport(struct work_struct *work); |
305 | static void fc_timeout_fail_rport_io(struct work_struct *work); | |
306 | static void fc_scsi_scan_rport(struct work_struct *work); | |
1da177e4 LT |
307 | |
308 | /* | |
309 | * Attribute counts pre object type... | |
310 | * Increase these values if you add attributes | |
311 | */ | |
312 | #define FC_STARGET_NUM_ATTRS 3 | |
0f29b966 | 313 | #define FC_RPORT_NUM_ATTRS 10 |
a53eb5e0 | 314 | #define FC_VPORT_NUM_ATTRS 9 |
bb8ef587 | 315 | #define FC_HOST_NUM_ATTRS 29 |
1da177e4 LT |
316 | |
317 | struct fc_internal { | |
318 | struct scsi_transport_template t; | |
319 | struct fc_function_template *f; | |
320 | ||
321 | /* | |
322 | * For attributes : each object has : | |
323 | * An array of the actual attributes structures | |
324 | * An array of null-terminated pointers to the attribute | |
325 | * structures - used for mid-layer interaction. | |
326 | * | |
327 | * The attribute containers for the starget and host are are | |
328 | * part of the midlayer. As the remote port is specific to the | |
329 | * fc transport, we must provide the attribute container. | |
330 | */ | |
ee959b00 | 331 | struct device_attribute private_starget_attrs[ |
1da177e4 | 332 | FC_STARGET_NUM_ATTRS]; |
ee959b00 | 333 | struct device_attribute *starget_attrs[FC_STARGET_NUM_ATTRS + 1]; |
1da177e4 | 334 | |
ee959b00 TJ |
335 | struct device_attribute private_host_attrs[FC_HOST_NUM_ATTRS]; |
336 | struct device_attribute *host_attrs[FC_HOST_NUM_ATTRS + 1]; | |
1da177e4 LT |
337 | |
338 | struct transport_container rport_attr_cont; | |
ee959b00 TJ |
339 | struct device_attribute private_rport_attrs[FC_RPORT_NUM_ATTRS]; |
340 | struct device_attribute *rport_attrs[FC_RPORT_NUM_ATTRS + 1]; | |
a53eb5e0 JS |
341 | |
342 | struct transport_container vport_attr_cont; | |
ee959b00 TJ |
343 | struct device_attribute private_vport_attrs[FC_VPORT_NUM_ATTRS]; |
344 | struct device_attribute *vport_attrs[FC_VPORT_NUM_ATTRS + 1]; | |
1da177e4 LT |
345 | }; |
346 | ||
347 | #define to_fc_internal(tmpl) container_of(tmpl, struct fc_internal, t) | |
348 | ||
d0a7e574 | 349 | static int fc_target_setup(struct transport_container *tc, struct device *dev, |
ee959b00 | 350 | struct device *cdev) |
1da177e4 LT |
351 | { |
352 | struct scsi_target *starget = to_scsi_target(dev); | |
353 | struct fc_rport *rport = starget_to_rport(starget); | |
354 | ||
355 | /* | |
356 | * if parent is remote port, use values from remote port. | |
357 | * Otherwise, this host uses the fc_transport, but not the | |
358 | * remote port interface. As such, initialize to known non-values. | |
359 | */ | |
360 | if (rport) { | |
361 | fc_starget_node_name(starget) = rport->node_name; | |
362 | fc_starget_port_name(starget) = rport->port_name; | |
363 | fc_starget_port_id(starget) = rport->port_id; | |
364 | } else { | |
365 | fc_starget_node_name(starget) = -1; | |
366 | fc_starget_port_name(starget) = -1; | |
367 | fc_starget_port_id(starget) = -1; | |
368 | } | |
369 | ||
370 | return 0; | |
371 | } | |
372 | ||
373 | static DECLARE_TRANSPORT_CLASS(fc_transport_class, | |
374 | "fc_transport", | |
375 | fc_target_setup, | |
376 | NULL, | |
377 | NULL); | |
378 | ||
d0a7e574 | 379 | static int fc_host_setup(struct transport_container *tc, struct device *dev, |
ee959b00 | 380 | struct device *cdev) |
1da177e4 LT |
381 | { |
382 | struct Scsi_Host *shost = dev_to_shost(dev); | |
aedf3497 | 383 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
1da177e4 | 384 | |
9ef3e4a4 | 385 | /* |
1da177e4 LT |
386 | * Set default values easily detected by the midlayer as |
387 | * failure cases. The scsi lldd is responsible for initializing | |
388 | * all transport attributes to valid values per host. | |
389 | */ | |
aedf3497 JS |
390 | fc_host->node_name = -1; |
391 | fc_host->port_name = -1; | |
392 | fc_host->permanent_port_name = -1; | |
393 | fc_host->supported_classes = FC_COS_UNSPECIFIED; | |
394 | memset(fc_host->supported_fc4s, 0, | |
395 | sizeof(fc_host->supported_fc4s)); | |
aedf3497 JS |
396 | fc_host->supported_speeds = FC_PORTSPEED_UNKNOWN; |
397 | fc_host->maxframe_size = -1; | |
a53eb5e0 | 398 | fc_host->max_npiv_vports = 0; |
aedf3497 JS |
399 | memset(fc_host->serial_number, 0, |
400 | sizeof(fc_host->serial_number)); | |
bb8ef587 NP |
401 | memset(fc_host->manufacturer, 0, |
402 | sizeof(fc_host->manufacturer)); | |
403 | memset(fc_host->model, 0, | |
404 | sizeof(fc_host->model)); | |
405 | memset(fc_host->model_description, 0, | |
406 | sizeof(fc_host->model_description)); | |
407 | memset(fc_host->hardware_version, 0, | |
408 | sizeof(fc_host->hardware_version)); | |
409 | memset(fc_host->driver_version, 0, | |
410 | sizeof(fc_host->driver_version)); | |
411 | memset(fc_host->firmware_version, 0, | |
412 | sizeof(fc_host->firmware_version)); | |
413 | memset(fc_host->optionrom_version, 0, | |
414 | sizeof(fc_host->optionrom_version)); | |
aedf3497 JS |
415 | |
416 | fc_host->port_id = -1; | |
417 | fc_host->port_type = FC_PORTTYPE_UNKNOWN; | |
418 | fc_host->port_state = FC_PORTSTATE_UNKNOWN; | |
419 | memset(fc_host->active_fc4s, 0, | |
420 | sizeof(fc_host->active_fc4s)); | |
421 | fc_host->speed = FC_PORTSPEED_UNKNOWN; | |
422 | fc_host->fabric_name = -1; | |
b8d08210 JS |
423 | memset(fc_host->symbolic_name, 0, sizeof(fc_host->symbolic_name)); |
424 | memset(fc_host->system_hostname, 0, sizeof(fc_host->system_hostname)); | |
aedf3497 JS |
425 | |
426 | fc_host->tgtid_bind_type = FC_TGTID_BIND_BY_WWPN; | |
427 | ||
428 | INIT_LIST_HEAD(&fc_host->rports); | |
429 | INIT_LIST_HEAD(&fc_host->rport_bindings); | |
a53eb5e0 | 430 | INIT_LIST_HEAD(&fc_host->vports); |
aedf3497 JS |
431 | fc_host->next_rport_number = 0; |
432 | fc_host->next_target_id = 0; | |
a53eb5e0 JS |
433 | fc_host->next_vport_number = 0; |
434 | fc_host->npiv_vports_inuse = 0; | |
aedf3497 | 435 | |
aab0de24 KS |
436 | snprintf(fc_host->work_q_name, sizeof(fc_host->work_q_name), |
437 | "fc_wq_%d", shost->host_no); | |
d8537548 | 438 | fc_host->work_q = alloc_workqueue("%s", 0, 0, fc_host->work_q_name); |
aedf3497 JS |
439 | if (!fc_host->work_q) |
440 | return -ENOMEM; | |
441 | ||
43ca910a | 442 | fc_host->dev_loss_tmo = fc_dev_loss_tmo; |
aab0de24 KS |
443 | snprintf(fc_host->devloss_work_q_name, |
444 | sizeof(fc_host->devloss_work_q_name), | |
445 | "fc_dl_%d", shost->host_no); | |
d8537548 KC |
446 | fc_host->devloss_work_q = alloc_workqueue("%s", 0, 0, |
447 | fc_host->devloss_work_q_name); | |
aedf3497 JS |
448 | if (!fc_host->devloss_work_q) { |
449 | destroy_workqueue(fc_host->work_q); | |
450 | fc_host->work_q = NULL; | |
451 | return -ENOMEM; | |
452 | } | |
453 | ||
9e4f5e29 JS |
454 | fc_bsg_hostadd(shost, fc_host); |
455 | /* ignore any bsg add error - we just can't do sgio */ | |
456 | ||
457 | return 0; | |
458 | } | |
459 | ||
460 | static int fc_host_remove(struct transport_container *tc, struct device *dev, | |
461 | struct device *cdev) | |
462 | { | |
463 | struct Scsi_Host *shost = dev_to_shost(dev); | |
464 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); | |
465 | ||
466 | fc_bsg_remove(fc_host->rqst_q); | |
1da177e4 LT |
467 | return 0; |
468 | } | |
469 | ||
470 | static DECLARE_TRANSPORT_CLASS(fc_host_class, | |
471 | "fc_host", | |
472 | fc_host_setup, | |
9e4f5e29 | 473 | fc_host_remove, |
1da177e4 LT |
474 | NULL); |
475 | ||
476 | /* | |
477 | * Setup and Remove actions for remote ports are handled | |
478 | * in the service functions below. | |
479 | */ | |
480 | static DECLARE_TRANSPORT_CLASS(fc_rport_class, | |
481 | "fc_remote_ports", | |
482 | NULL, | |
483 | NULL, | |
484 | NULL); | |
485 | ||
a53eb5e0 JS |
486 | /* |
487 | * Setup and Remove actions for virtual ports are handled | |
488 | * in the service functions below. | |
489 | */ | |
490 | static DECLARE_TRANSPORT_CLASS(fc_vport_class, | |
491 | "fc_vports", | |
492 | NULL, | |
493 | NULL, | |
494 | NULL); | |
495 | ||
eb44820c | 496 | /* |
84314fd4 | 497 | * Netlink Infrastructure |
eb44820c | 498 | */ |
84314fd4 JS |
499 | |
500 | static atomic_t fc_event_seq; | |
501 | ||
502 | /** | |
503 | * fc_get_event_number - Obtain the next sequential FC event number | |
504 | * | |
505 | * Notes: | |
eb44820c | 506 | * We could have inlined this, but it would have required fc_event_seq to |
84314fd4 JS |
507 | * be exposed. For now, live with the subroutine call. |
508 | * Atomic used to avoid lock/unlock... | |
eb44820c | 509 | */ |
84314fd4 JS |
510 | u32 |
511 | fc_get_event_number(void) | |
512 | { | |
513 | return atomic_add_return(1, &fc_event_seq); | |
514 | } | |
515 | EXPORT_SYMBOL(fc_get_event_number); | |
516 | ||
517 | ||
518 | /** | |
519 | * fc_host_post_event - called to post an even on an fc_host. | |
84314fd4 JS |
520 | * @shost: host the event occurred on |
521 | * @event_number: fc event number obtained from get_fc_event_number() | |
522 | * @event_code: fc_host event being posted | |
523 | * @event_data: 32bits of data for the event being posted | |
524 | * | |
525 | * Notes: | |
526 | * This routine assumes no locks are held on entry. | |
eb44820c | 527 | */ |
84314fd4 JS |
528 | void |
529 | fc_host_post_event(struct Scsi_Host *shost, u32 event_number, | |
530 | enum fc_host_event_code event_code, u32 event_data) | |
531 | { | |
532 | struct sk_buff *skb; | |
533 | struct nlmsghdr *nlh; | |
534 | struct fc_nl_event *event; | |
535 | const char *name; | |
e07ebea0 | 536 | u32 len; |
84314fd4 JS |
537 | int err; |
538 | ||
539 | if (!scsi_nl_sock) { | |
540 | err = -ENOENT; | |
541 | goto send_fail; | |
542 | } | |
543 | ||
544 | len = FC_NL_MSGALIGN(sizeof(*event)); | |
84314fd4 | 545 | |
e07ebea0 | 546 | skb = nlmsg_new(len, GFP_KERNEL); |
84314fd4 JS |
547 | if (!skb) { |
548 | err = -ENOBUFS; | |
549 | goto send_fail; | |
550 | } | |
551 | ||
e07ebea0 | 552 | nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, len, 0); |
84314fd4 JS |
553 | if (!nlh) { |
554 | err = -ENOBUFS; | |
555 | goto send_fail_skb; | |
556 | } | |
e07ebea0 | 557 | event = nlmsg_data(nlh); |
84314fd4 JS |
558 | |
559 | INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC, | |
560 | FC_NL_ASYNC_EVENT, len); | |
561 | event->seconds = get_seconds(); | |
562 | event->vendor_id = 0; | |
563 | event->host_no = shost->host_no; | |
564 | event->event_datalen = sizeof(u32); /* bytes */ | |
565 | event->event_num = event_number; | |
566 | event->event_code = event_code; | |
567 | event->event_data = event_data; | |
568 | ||
ff491a73 PNA |
569 | nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS, |
570 | GFP_KERNEL); | |
84314fd4 JS |
571 | return; |
572 | ||
573 | send_fail_skb: | |
574 | kfree_skb(skb); | |
575 | send_fail: | |
576 | name = get_fc_host_event_code_name(event_code); | |
577 | printk(KERN_WARNING | |
578 | "%s: Dropped Event : host %d %s data 0x%08x - err %d\n", | |
cadbd4a5 | 579 | __func__, shost->host_no, |
84314fd4 JS |
580 | (name) ? name : "<unknown>", event_data, err); |
581 | return; | |
582 | } | |
583 | EXPORT_SYMBOL(fc_host_post_event); | |
584 | ||
585 | ||
586 | /** | |
eb44820c | 587 | * fc_host_post_vendor_event - called to post a vendor unique event on an fc_host |
84314fd4 JS |
588 | * @shost: host the event occurred on |
589 | * @event_number: fc event number obtained from get_fc_event_number() | |
590 | * @data_len: amount, in bytes, of vendor unique data | |
591 | * @data_buf: pointer to vendor unique data | |
eb44820c | 592 | * @vendor_id: Vendor id |
84314fd4 JS |
593 | * |
594 | * Notes: | |
595 | * This routine assumes no locks are held on entry. | |
eb44820c | 596 | */ |
84314fd4 JS |
597 | void |
598 | fc_host_post_vendor_event(struct Scsi_Host *shost, u32 event_number, | |
f14e2e29 | 599 | u32 data_len, char * data_buf, u64 vendor_id) |
84314fd4 JS |
600 | { |
601 | struct sk_buff *skb; | |
602 | struct nlmsghdr *nlh; | |
603 | struct fc_nl_event *event; | |
e07ebea0 | 604 | u32 len; |
84314fd4 JS |
605 | int err; |
606 | ||
607 | if (!scsi_nl_sock) { | |
608 | err = -ENOENT; | |
609 | goto send_vendor_fail; | |
610 | } | |
611 | ||
612 | len = FC_NL_MSGALIGN(sizeof(*event) + data_len); | |
84314fd4 | 613 | |
e07ebea0 | 614 | skb = nlmsg_new(len, GFP_KERNEL); |
84314fd4 JS |
615 | if (!skb) { |
616 | err = -ENOBUFS; | |
617 | goto send_vendor_fail; | |
618 | } | |
619 | ||
e07ebea0 | 620 | nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, len, 0); |
84314fd4 JS |
621 | if (!nlh) { |
622 | err = -ENOBUFS; | |
623 | goto send_vendor_fail_skb; | |
624 | } | |
e07ebea0 | 625 | event = nlmsg_data(nlh); |
84314fd4 JS |
626 | |
627 | INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC, | |
628 | FC_NL_ASYNC_EVENT, len); | |
629 | event->seconds = get_seconds(); | |
630 | event->vendor_id = vendor_id; | |
631 | event->host_no = shost->host_no; | |
632 | event->event_datalen = data_len; /* bytes */ | |
633 | event->event_num = event_number; | |
634 | event->event_code = FCH_EVT_VENDOR_UNIQUE; | |
635 | memcpy(&event->event_data, data_buf, data_len); | |
636 | ||
ff491a73 PNA |
637 | nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS, |
638 | GFP_KERNEL); | |
84314fd4 JS |
639 | return; |
640 | ||
641 | send_vendor_fail_skb: | |
642 | kfree_skb(skb); | |
643 | send_vendor_fail: | |
644 | printk(KERN_WARNING | |
645 | "%s: Dropped Event : host %d vendor_unique - err %d\n", | |
cadbd4a5 | 646 | __func__, shost->host_no, err); |
84314fd4 JS |
647 | return; |
648 | } | |
649 | EXPORT_SYMBOL(fc_host_post_vendor_event); | |
650 | ||
651 | ||
1da177e4 LT |
652 | |
653 | static __init int fc_transport_init(void) | |
654 | { | |
84314fd4 JS |
655 | int error; |
656 | ||
657 | atomic_set(&fc_event_seq, 0); | |
658 | ||
659 | error = transport_class_register(&fc_host_class); | |
a53eb5e0 JS |
660 | if (error) |
661 | return error; | |
662 | error = transport_class_register(&fc_vport_class); | |
1da177e4 | 663 | if (error) |
48de68a4 | 664 | goto unreg_host_class; |
1da177e4 LT |
665 | error = transport_class_register(&fc_rport_class); |
666 | if (error) | |
48de68a4 MC |
667 | goto unreg_vport_class; |
668 | error = transport_class_register(&fc_transport_class); | |
669 | if (error) | |
670 | goto unreg_rport_class; | |
671 | return 0; | |
672 | ||
673 | unreg_rport_class: | |
674 | transport_class_unregister(&fc_rport_class); | |
675 | unreg_vport_class: | |
676 | transport_class_unregister(&fc_vport_class); | |
677 | unreg_host_class: | |
678 | transport_class_unregister(&fc_host_class); | |
679 | return error; | |
1da177e4 LT |
680 | } |
681 | ||
682 | static void __exit fc_transport_exit(void) | |
683 | { | |
684 | transport_class_unregister(&fc_transport_class); | |
685 | transport_class_unregister(&fc_rport_class); | |
686 | transport_class_unregister(&fc_host_class); | |
a53eb5e0 | 687 | transport_class_unregister(&fc_vport_class); |
1da177e4 LT |
688 | } |
689 | ||
690 | /* | |
691 | * FC Remote Port Attribute Management | |
692 | */ | |
693 | ||
694 | #define fc_rport_show_function(field, format_string, sz, cast) \ | |
695 | static ssize_t \ | |
ee959b00 TJ |
696 | show_fc_rport_##field (struct device *dev, \ |
697 | struct device_attribute *attr, char *buf) \ | |
1da177e4 | 698 | { \ |
ee959b00 | 699 | struct fc_rport *rport = transport_class_to_rport(dev); \ |
1da177e4 LT |
700 | struct Scsi_Host *shost = rport_to_shost(rport); \ |
701 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
19a7b4ae JSEC |
702 | if ((i->f->get_rport_##field) && \ |
703 | !((rport->port_state == FC_PORTSTATE_BLOCKED) || \ | |
42e33148 | 704 | (rport->port_state == FC_PORTSTATE_DELETED) || \ |
19a7b4ae | 705 | (rport->port_state == FC_PORTSTATE_NOTPRESENT))) \ |
1da177e4 LT |
706 | i->f->get_rport_##field(rport); \ |
707 | return snprintf(buf, sz, format_string, cast rport->field); \ | |
708 | } | |
709 | ||
710 | #define fc_rport_store_function(field) \ | |
711 | static ssize_t \ | |
ee959b00 TJ |
712 | store_fc_rport_##field(struct device *dev, \ |
713 | struct device_attribute *attr, \ | |
714 | const char *buf, size_t count) \ | |
1da177e4 LT |
715 | { \ |
716 | int val; \ | |
ee959b00 | 717 | struct fc_rport *rport = transport_class_to_rport(dev); \ |
1da177e4 LT |
718 | struct Scsi_Host *shost = rport_to_shost(rport); \ |
719 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
0f29b966 | 720 | char *cp; \ |
19a7b4ae | 721 | if ((rport->port_state == FC_PORTSTATE_BLOCKED) || \ |
42e33148 | 722 | (rport->port_state == FC_PORTSTATE_DELETED) || \ |
19a7b4ae JSEC |
723 | (rport->port_state == FC_PORTSTATE_NOTPRESENT)) \ |
724 | return -EBUSY; \ | |
0f29b966 JS |
725 | val = simple_strtoul(buf, &cp, 0); \ |
726 | if (*cp && (*cp != '\n')) \ | |
727 | return -EINVAL; \ | |
1da177e4 LT |
728 | i->f->set_rport_##field(rport, val); \ |
729 | return count; \ | |
730 | } | |
731 | ||
732 | #define fc_rport_rd_attr(field, format_string, sz) \ | |
733 | fc_rport_show_function(field, format_string, sz, ) \ | |
ee959b00 | 734 | static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ |
1da177e4 LT |
735 | show_fc_rport_##field, NULL) |
736 | ||
737 | #define fc_rport_rd_attr_cast(field, format_string, sz, cast) \ | |
738 | fc_rport_show_function(field, format_string, sz, (cast)) \ | |
ee959b00 | 739 | static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ |
1da177e4 LT |
740 | show_fc_rport_##field, NULL) |
741 | ||
742 | #define fc_rport_rw_attr(field, format_string, sz) \ | |
743 | fc_rport_show_function(field, format_string, sz, ) \ | |
744 | fc_rport_store_function(field) \ | |
ee959b00 | 745 | static FC_DEVICE_ATTR(rport, field, S_IRUGO | S_IWUSR, \ |
1da177e4 LT |
746 | show_fc_rport_##field, \ |
747 | store_fc_rport_##field) | |
748 | ||
749 | ||
750 | #define fc_private_rport_show_function(field, format_string, sz, cast) \ | |
751 | static ssize_t \ | |
ee959b00 TJ |
752 | show_fc_rport_##field (struct device *dev, \ |
753 | struct device_attribute *attr, char *buf) \ | |
1da177e4 | 754 | { \ |
ee959b00 | 755 | struct fc_rport *rport = transport_class_to_rport(dev); \ |
1da177e4 LT |
756 | return snprintf(buf, sz, format_string, cast rport->field); \ |
757 | } | |
758 | ||
759 | #define fc_private_rport_rd_attr(field, format_string, sz) \ | |
760 | fc_private_rport_show_function(field, format_string, sz, ) \ | |
ee959b00 | 761 | static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ |
1da177e4 LT |
762 | show_fc_rport_##field, NULL) |
763 | ||
764 | #define fc_private_rport_rd_attr_cast(field, format_string, sz, cast) \ | |
765 | fc_private_rport_show_function(field, format_string, sz, (cast)) \ | |
ee959b00 | 766 | static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ |
1da177e4 LT |
767 | show_fc_rport_##field, NULL) |
768 | ||
769 | ||
770 | #define fc_private_rport_rd_enum_attr(title, maxlen) \ | |
771 | static ssize_t \ | |
ee959b00 TJ |
772 | show_fc_rport_##title (struct device *dev, \ |
773 | struct device_attribute *attr, char *buf) \ | |
1da177e4 | 774 | { \ |
ee959b00 | 775 | struct fc_rport *rport = transport_class_to_rport(dev); \ |
1da177e4 LT |
776 | const char *name; \ |
777 | name = get_fc_##title##_name(rport->title); \ | |
778 | if (!name) \ | |
779 | return -EINVAL; \ | |
780 | return snprintf(buf, maxlen, "%s\n", name); \ | |
781 | } \ | |
ee959b00 | 782 | static FC_DEVICE_ATTR(rport, title, S_IRUGO, \ |
1da177e4 LT |
783 | show_fc_rport_##title, NULL) |
784 | ||
785 | ||
786 | #define SETUP_RPORT_ATTRIBUTE_RD(field) \ | |
ee959b00 | 787 | i->private_rport_attrs[count] = device_attr_rport_##field; \ |
1da177e4 LT |
788 | i->private_rport_attrs[count].attr.mode = S_IRUGO; \ |
789 | i->private_rport_attrs[count].store = NULL; \ | |
790 | i->rport_attrs[count] = &i->private_rport_attrs[count]; \ | |
791 | if (i->f->show_rport_##field) \ | |
792 | count++ | |
793 | ||
794 | #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(field) \ | |
ee959b00 | 795 | i->private_rport_attrs[count] = device_attr_rport_##field; \ |
1da177e4 LT |
796 | i->private_rport_attrs[count].attr.mode = S_IRUGO; \ |
797 | i->private_rport_attrs[count].store = NULL; \ | |
798 | i->rport_attrs[count] = &i->private_rport_attrs[count]; \ | |
799 | count++ | |
800 | ||
801 | #define SETUP_RPORT_ATTRIBUTE_RW(field) \ | |
ee959b00 | 802 | i->private_rport_attrs[count] = device_attr_rport_##field; \ |
1da177e4 LT |
803 | if (!i->f->set_rport_##field) { \ |
804 | i->private_rport_attrs[count].attr.mode = S_IRUGO; \ | |
805 | i->private_rport_attrs[count].store = NULL; \ | |
806 | } \ | |
807 | i->rport_attrs[count] = &i->private_rport_attrs[count]; \ | |
808 | if (i->f->show_rport_##field) \ | |
809 | count++ | |
810 | ||
0f29b966 JS |
811 | #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(field) \ |
812 | { \ | |
ee959b00 | 813 | i->private_rport_attrs[count] = device_attr_rport_##field; \ |
0f29b966 JS |
814 | i->rport_attrs[count] = &i->private_rport_attrs[count]; \ |
815 | count++; \ | |
816 | } | |
817 | ||
1da177e4 LT |
818 | |
819 | /* The FC Transport Remote Port Attributes: */ | |
820 | ||
821 | /* Fixed Remote Port Attributes */ | |
822 | ||
823 | fc_private_rport_rd_attr(maxframe_size, "%u bytes\n", 20); | |
824 | ||
825 | static ssize_t | |
ee959b00 TJ |
826 | show_fc_rport_supported_classes (struct device *dev, |
827 | struct device_attribute *attr, char *buf) | |
1da177e4 | 828 | { |
ee959b00 | 829 | struct fc_rport *rport = transport_class_to_rport(dev); |
1da177e4 LT |
830 | if (rport->supported_classes == FC_COS_UNSPECIFIED) |
831 | return snprintf(buf, 20, "unspecified\n"); | |
832 | return get_fc_cos_names(rport->supported_classes, buf); | |
833 | } | |
ee959b00 | 834 | static FC_DEVICE_ATTR(rport, supported_classes, S_IRUGO, |
1da177e4 LT |
835 | show_fc_rport_supported_classes, NULL); |
836 | ||
837 | /* Dynamic Remote Port Attributes */ | |
838 | ||
19a7b4ae JSEC |
839 | /* |
840 | * dev_loss_tmo attribute | |
841 | */ | |
43ca910a MC |
842 | static int fc_str_to_dev_loss(const char *buf, unsigned long *val) |
843 | { | |
844 | char *cp; | |
845 | ||
846 | *val = simple_strtoul(buf, &cp, 0); | |
847 | if ((*cp && (*cp != '\n')) || (*val < 0)) | |
848 | return -EINVAL; | |
849 | /* | |
850 | * Check for overflow; dev_loss_tmo is u32 | |
851 | */ | |
852 | if (*val > UINT_MAX) | |
853 | return -EINVAL; | |
854 | ||
855 | return 0; | |
856 | } | |
857 | ||
858 | static int fc_rport_set_dev_loss_tmo(struct fc_rport *rport, | |
859 | unsigned long val) | |
19a7b4ae | 860 | { |
19a7b4ae JSEC |
861 | struct Scsi_Host *shost = rport_to_shost(rport); |
862 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
43ca910a | 863 | |
19a7b4ae | 864 | if ((rport->port_state == FC_PORTSTATE_BLOCKED) || |
42e33148 | 865 | (rport->port_state == FC_PORTSTATE_DELETED) || |
19a7b4ae JSEC |
866 | (rport->port_state == FC_PORTSTATE_NOTPRESENT)) |
867 | return -EBUSY; | |
36dd288f HR |
868 | /* |
869 | * Check for overflow; dev_loss_tmo is u32 | |
870 | */ | |
871 | if (val > UINT_MAX) | |
872 | return -EINVAL; | |
873 | ||
f2818663 HR |
874 | /* |
875 | * If fast_io_fail is off we have to cap | |
876 | * dev_loss_tmo at SCSI_DEVICE_BLOCK_MAX_TIMEOUT | |
877 | */ | |
878 | if (rport->fast_io_fail_tmo == -1 && | |
879 | val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT) | |
880 | return -EINVAL; | |
881 | ||
19a7b4ae | 882 | i->f->set_rport_dev_loss_tmo(rport, val); |
43ca910a MC |
883 | return 0; |
884 | } | |
885 | ||
886 | fc_rport_show_function(dev_loss_tmo, "%d\n", 20, ) | |
887 | static ssize_t | |
888 | store_fc_rport_dev_loss_tmo(struct device *dev, struct device_attribute *attr, | |
889 | const char *buf, size_t count) | |
890 | { | |
891 | struct fc_rport *rport = transport_class_to_rport(dev); | |
892 | unsigned long val; | |
893 | int rc; | |
894 | ||
895 | rc = fc_str_to_dev_loss(buf, &val); | |
896 | if (rc) | |
897 | return rc; | |
898 | ||
899 | rc = fc_rport_set_dev_loss_tmo(rport, val); | |
900 | if (rc) | |
901 | return rc; | |
19a7b4ae JSEC |
902 | return count; |
903 | } | |
ee959b00 | 904 | static FC_DEVICE_ATTR(rport, dev_loss_tmo, S_IRUGO | S_IWUSR, |
19a7b4ae | 905 | show_fc_rport_dev_loss_tmo, store_fc_rport_dev_loss_tmo); |
1da177e4 LT |
906 | |
907 | ||
908 | /* Private Remote Port Attributes */ | |
909 | ||
910 | fc_private_rport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); | |
911 | fc_private_rport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); | |
912 | fc_private_rport_rd_attr(port_id, "0x%06x\n", 20); | |
913 | ||
914 | static ssize_t | |
ee959b00 TJ |
915 | show_fc_rport_roles (struct device *dev, struct device_attribute *attr, |
916 | char *buf) | |
1da177e4 | 917 | { |
ee959b00 | 918 | struct fc_rport *rport = transport_class_to_rport(dev); |
1da177e4 LT |
919 | |
920 | /* identify any roles that are port_id specific */ | |
921 | if ((rport->port_id != -1) && | |
922 | (rport->port_id & FC_WELLKNOWN_PORTID_MASK) == | |
923 | FC_WELLKNOWN_PORTID_MASK) { | |
924 | switch (rport->port_id & FC_WELLKNOWN_ROLE_MASK) { | |
925 | case FC_FPORT_PORTID: | |
926 | return snprintf(buf, 30, "Fabric Port\n"); | |
927 | case FC_FABCTLR_PORTID: | |
928 | return snprintf(buf, 30, "Fabric Controller\n"); | |
929 | case FC_DIRSRVR_PORTID: | |
930 | return snprintf(buf, 30, "Directory Server\n"); | |
931 | case FC_TIMESRVR_PORTID: | |
932 | return snprintf(buf, 30, "Time Server\n"); | |
933 | case FC_MGMTSRVR_PORTID: | |
934 | return snprintf(buf, 30, "Management Server\n"); | |
935 | default: | |
936 | return snprintf(buf, 30, "Unknown Fabric Entity\n"); | |
937 | } | |
938 | } else { | |
a53eb5e0 | 939 | if (rport->roles == FC_PORT_ROLE_UNKNOWN) |
1da177e4 | 940 | return snprintf(buf, 20, "unknown\n"); |
a53eb5e0 | 941 | return get_fc_port_roles_names(rport->roles, buf); |
1da177e4 LT |
942 | } |
943 | } | |
ee959b00 | 944 | static FC_DEVICE_ATTR(rport, roles, S_IRUGO, |
1da177e4 LT |
945 | show_fc_rport_roles, NULL); |
946 | ||
947 | fc_private_rport_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN); | |
948 | fc_private_rport_rd_attr(scsi_target_id, "%d\n", 20); | |
949 | ||
0f29b966 JS |
950 | /* |
951 | * fast_io_fail_tmo attribute | |
952 | */ | |
953 | static ssize_t | |
ee959b00 TJ |
954 | show_fc_rport_fast_io_fail_tmo (struct device *dev, |
955 | struct device_attribute *attr, char *buf) | |
0f29b966 | 956 | { |
ee959b00 | 957 | struct fc_rport *rport = transport_class_to_rport(dev); |
0f29b966 JS |
958 | |
959 | if (rport->fast_io_fail_tmo == -1) | |
960 | return snprintf(buf, 5, "off\n"); | |
961 | return snprintf(buf, 20, "%d\n", rport->fast_io_fail_tmo); | |
962 | } | |
963 | ||
964 | static ssize_t | |
ee959b00 TJ |
965 | store_fc_rport_fast_io_fail_tmo(struct device *dev, |
966 | struct device_attribute *attr, const char *buf, | |
967 | size_t count) | |
0f29b966 JS |
968 | { |
969 | int val; | |
970 | char *cp; | |
ee959b00 | 971 | struct fc_rport *rport = transport_class_to_rport(dev); |
0f29b966 JS |
972 | |
973 | if ((rport->port_state == FC_PORTSTATE_BLOCKED) || | |
974 | (rport->port_state == FC_PORTSTATE_DELETED) || | |
975 | (rport->port_state == FC_PORTSTATE_NOTPRESENT)) | |
976 | return -EBUSY; | |
977 | if (strncmp(buf, "off", 3) == 0) | |
978 | rport->fast_io_fail_tmo = -1; | |
979 | else { | |
980 | val = simple_strtoul(buf, &cp, 0); | |
f2818663 HR |
981 | if ((*cp && (*cp != '\n')) || (val < 0)) |
982 | return -EINVAL; | |
983 | /* | |
984 | * Cap fast_io_fail by dev_loss_tmo or | |
985 | * SCSI_DEVICE_BLOCK_MAX_TIMEOUT. | |
986 | */ | |
987 | if ((val >= rport->dev_loss_tmo) || | |
988 | (val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT)) | |
0f29b966 | 989 | return -EINVAL; |
f2818663 | 990 | |
0f29b966 JS |
991 | rport->fast_io_fail_tmo = val; |
992 | } | |
993 | return count; | |
994 | } | |
ee959b00 | 995 | static FC_DEVICE_ATTR(rport, fast_io_fail_tmo, S_IRUGO | S_IWUSR, |
0f29b966 | 996 | show_fc_rport_fast_io_fail_tmo, store_fc_rport_fast_io_fail_tmo); |
1da177e4 LT |
997 | |
998 | ||
999 | /* | |
1000 | * FC SCSI Target Attribute Management | |
1001 | */ | |
1002 | ||
1003 | /* | |
1004 | * Note: in the target show function we recognize when the remote | |
732bee7a | 1005 | * port is in the hierarchy and do not allow the driver to get |
1da177e4 LT |
1006 | * involved in sysfs functions. The driver only gets involved if |
1007 | * it's the "old" style that doesn't use rports. | |
1008 | */ | |
1009 | #define fc_starget_show_function(field, format_string, sz, cast) \ | |
1010 | static ssize_t \ | |
ee959b00 TJ |
1011 | show_fc_starget_##field (struct device *dev, \ |
1012 | struct device_attribute *attr, char *buf) \ | |
1da177e4 | 1013 | { \ |
ee959b00 | 1014 | struct scsi_target *starget = transport_class_to_starget(dev); \ |
1da177e4 LT |
1015 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \ |
1016 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
1017 | struct fc_rport *rport = starget_to_rport(starget); \ | |
1018 | if (rport) \ | |
1019 | fc_starget_##field(starget) = rport->field; \ | |
1020 | else if (i->f->get_starget_##field) \ | |
1021 | i->f->get_starget_##field(starget); \ | |
1022 | return snprintf(buf, sz, format_string, \ | |
1023 | cast fc_starget_##field(starget)); \ | |
1024 | } | |
1025 | ||
1026 | #define fc_starget_rd_attr(field, format_string, sz) \ | |
1027 | fc_starget_show_function(field, format_string, sz, ) \ | |
ee959b00 | 1028 | static FC_DEVICE_ATTR(starget, field, S_IRUGO, \ |
1da177e4 LT |
1029 | show_fc_starget_##field, NULL) |
1030 | ||
1031 | #define fc_starget_rd_attr_cast(field, format_string, sz, cast) \ | |
1032 | fc_starget_show_function(field, format_string, sz, (cast)) \ | |
ee959b00 | 1033 | static FC_DEVICE_ATTR(starget, field, S_IRUGO, \ |
1da177e4 LT |
1034 | show_fc_starget_##field, NULL) |
1035 | ||
1036 | #define SETUP_STARGET_ATTRIBUTE_RD(field) \ | |
ee959b00 | 1037 | i->private_starget_attrs[count] = device_attr_starget_##field; \ |
1da177e4 LT |
1038 | i->private_starget_attrs[count].attr.mode = S_IRUGO; \ |
1039 | i->private_starget_attrs[count].store = NULL; \ | |
1040 | i->starget_attrs[count] = &i->private_starget_attrs[count]; \ | |
1041 | if (i->f->show_starget_##field) \ | |
1042 | count++ | |
1043 | ||
1044 | #define SETUP_STARGET_ATTRIBUTE_RW(field) \ | |
ee959b00 | 1045 | i->private_starget_attrs[count] = device_attr_starget_##field; \ |
1da177e4 LT |
1046 | if (!i->f->set_starget_##field) { \ |
1047 | i->private_starget_attrs[count].attr.mode = S_IRUGO; \ | |
1048 | i->private_starget_attrs[count].store = NULL; \ | |
1049 | } \ | |
1050 | i->starget_attrs[count] = &i->private_starget_attrs[count]; \ | |
1051 | if (i->f->show_starget_##field) \ | |
1052 | count++ | |
1053 | ||
1054 | /* The FC Transport SCSI Target Attributes: */ | |
1055 | fc_starget_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); | |
1056 | fc_starget_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); | |
1057 | fc_starget_rd_attr(port_id, "0x%06x\n", 20); | |
1058 | ||
1059 | ||
a53eb5e0 JS |
1060 | /* |
1061 | * FC Virtual Port Attribute Management | |
1062 | */ | |
1063 | ||
1064 | #define fc_vport_show_function(field, format_string, sz, cast) \ | |
1065 | static ssize_t \ | |
ee959b00 TJ |
1066 | show_fc_vport_##field (struct device *dev, \ |
1067 | struct device_attribute *attr, char *buf) \ | |
a53eb5e0 | 1068 | { \ |
ee959b00 | 1069 | struct fc_vport *vport = transport_class_to_vport(dev); \ |
a53eb5e0 JS |
1070 | struct Scsi_Host *shost = vport_to_shost(vport); \ |
1071 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
1072 | if ((i->f->get_vport_##field) && \ | |
1073 | !(vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))) \ | |
1074 | i->f->get_vport_##field(vport); \ | |
1075 | return snprintf(buf, sz, format_string, cast vport->field); \ | |
1076 | } | |
1077 | ||
1078 | #define fc_vport_store_function(field) \ | |
1079 | static ssize_t \ | |
ee959b00 TJ |
1080 | store_fc_vport_##field(struct device *dev, \ |
1081 | struct device_attribute *attr, \ | |
1082 | const char *buf, size_t count) \ | |
a53eb5e0 JS |
1083 | { \ |
1084 | int val; \ | |
ee959b00 | 1085 | struct fc_vport *vport = transport_class_to_vport(dev); \ |
a53eb5e0 JS |
1086 | struct Scsi_Host *shost = vport_to_shost(vport); \ |
1087 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
1088 | char *cp; \ | |
1089 | if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \ | |
1090 | return -EBUSY; \ | |
1091 | val = simple_strtoul(buf, &cp, 0); \ | |
1092 | if (*cp && (*cp != '\n')) \ | |
1093 | return -EINVAL; \ | |
1094 | i->f->set_vport_##field(vport, val); \ | |
1095 | return count; \ | |
1096 | } | |
1097 | ||
1098 | #define fc_vport_store_str_function(field, slen) \ | |
1099 | static ssize_t \ | |
ee959b00 TJ |
1100 | store_fc_vport_##field(struct device *dev, \ |
1101 | struct device_attribute *attr, \ | |
1102 | const char *buf, size_t count) \ | |
a53eb5e0 | 1103 | { \ |
ee959b00 | 1104 | struct fc_vport *vport = transport_class_to_vport(dev); \ |
a53eb5e0 JS |
1105 | struct Scsi_Host *shost = vport_to_shost(vport); \ |
1106 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
1107 | unsigned int cnt=count; \ | |
1108 | \ | |
1109 | /* count may include a LF at end of string */ \ | |
1110 | if (buf[cnt-1] == '\n') \ | |
1111 | cnt--; \ | |
1112 | if (cnt > ((slen) - 1)) \ | |
1113 | return -EINVAL; \ | |
1114 | memcpy(vport->field, buf, cnt); \ | |
1115 | i->f->set_vport_##field(vport); \ | |
1116 | return count; \ | |
1117 | } | |
1118 | ||
1119 | #define fc_vport_rd_attr(field, format_string, sz) \ | |
1120 | fc_vport_show_function(field, format_string, sz, ) \ | |
ee959b00 | 1121 | static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ |
a53eb5e0 JS |
1122 | show_fc_vport_##field, NULL) |
1123 | ||
1124 | #define fc_vport_rd_attr_cast(field, format_string, sz, cast) \ | |
1125 | fc_vport_show_function(field, format_string, sz, (cast)) \ | |
ee959b00 | 1126 | static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ |
a53eb5e0 JS |
1127 | show_fc_vport_##field, NULL) |
1128 | ||
1129 | #define fc_vport_rw_attr(field, format_string, sz) \ | |
1130 | fc_vport_show_function(field, format_string, sz, ) \ | |
1131 | fc_vport_store_function(field) \ | |
ee959b00 | 1132 | static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \ |
a53eb5e0 JS |
1133 | show_fc_vport_##field, \ |
1134 | store_fc_vport_##field) | |
1135 | ||
1136 | #define fc_private_vport_show_function(field, format_string, sz, cast) \ | |
1137 | static ssize_t \ | |
ee959b00 TJ |
1138 | show_fc_vport_##field (struct device *dev, \ |
1139 | struct device_attribute *attr, char *buf) \ | |
a53eb5e0 | 1140 | { \ |
ee959b00 | 1141 | struct fc_vport *vport = transport_class_to_vport(dev); \ |
a53eb5e0 JS |
1142 | return snprintf(buf, sz, format_string, cast vport->field); \ |
1143 | } | |
1144 | ||
1145 | #define fc_private_vport_store_u32_function(field) \ | |
1146 | static ssize_t \ | |
ee959b00 TJ |
1147 | store_fc_vport_##field(struct device *dev, \ |
1148 | struct device_attribute *attr, \ | |
1149 | const char *buf, size_t count) \ | |
a53eb5e0 JS |
1150 | { \ |
1151 | u32 val; \ | |
ee959b00 | 1152 | struct fc_vport *vport = transport_class_to_vport(dev); \ |
a53eb5e0 JS |
1153 | char *cp; \ |
1154 | if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \ | |
1155 | return -EBUSY; \ | |
1156 | val = simple_strtoul(buf, &cp, 0); \ | |
1157 | if (*cp && (*cp != '\n')) \ | |
1158 | return -EINVAL; \ | |
1159 | vport->field = val; \ | |
1160 | return count; \ | |
1161 | } | |
1162 | ||
1163 | ||
1164 | #define fc_private_vport_rd_attr(field, format_string, sz) \ | |
1165 | fc_private_vport_show_function(field, format_string, sz, ) \ | |
ee959b00 | 1166 | static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ |
a53eb5e0 JS |
1167 | show_fc_vport_##field, NULL) |
1168 | ||
1169 | #define fc_private_vport_rd_attr_cast(field, format_string, sz, cast) \ | |
1170 | fc_private_vport_show_function(field, format_string, sz, (cast)) \ | |
ee959b00 | 1171 | static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ |
a53eb5e0 JS |
1172 | show_fc_vport_##field, NULL) |
1173 | ||
1174 | #define fc_private_vport_rw_u32_attr(field, format_string, sz) \ | |
1175 | fc_private_vport_show_function(field, format_string, sz, ) \ | |
1176 | fc_private_vport_store_u32_function(field) \ | |
ee959b00 | 1177 | static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \ |
a53eb5e0 JS |
1178 | show_fc_vport_##field, \ |
1179 | store_fc_vport_##field) | |
1180 | ||
1181 | ||
1182 | #define fc_private_vport_rd_enum_attr(title, maxlen) \ | |
1183 | static ssize_t \ | |
ee959b00 TJ |
1184 | show_fc_vport_##title (struct device *dev, \ |
1185 | struct device_attribute *attr, \ | |
1186 | char *buf) \ | |
a53eb5e0 | 1187 | { \ |
ee959b00 | 1188 | struct fc_vport *vport = transport_class_to_vport(dev); \ |
a53eb5e0 JS |
1189 | const char *name; \ |
1190 | name = get_fc_##title##_name(vport->title); \ | |
1191 | if (!name) \ | |
1192 | return -EINVAL; \ | |
1193 | return snprintf(buf, maxlen, "%s\n", name); \ | |
1194 | } \ | |
ee959b00 | 1195 | static FC_DEVICE_ATTR(vport, title, S_IRUGO, \ |
a53eb5e0 JS |
1196 | show_fc_vport_##title, NULL) |
1197 | ||
1198 | ||
1199 | #define SETUP_VPORT_ATTRIBUTE_RD(field) \ | |
ee959b00 | 1200 | i->private_vport_attrs[count] = device_attr_vport_##field; \ |
a53eb5e0 JS |
1201 | i->private_vport_attrs[count].attr.mode = S_IRUGO; \ |
1202 | i->private_vport_attrs[count].store = NULL; \ | |
1203 | i->vport_attrs[count] = &i->private_vport_attrs[count]; \ | |
1204 | if (i->f->get_##field) \ | |
1205 | count++ | |
1206 | /* NOTE: Above MACRO differs: checks function not show bit */ | |
1207 | ||
1208 | #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(field) \ | |
ee959b00 | 1209 | i->private_vport_attrs[count] = device_attr_vport_##field; \ |
a53eb5e0 JS |
1210 | i->private_vport_attrs[count].attr.mode = S_IRUGO; \ |
1211 | i->private_vport_attrs[count].store = NULL; \ | |
1212 | i->vport_attrs[count] = &i->private_vport_attrs[count]; \ | |
1213 | count++ | |
1214 | ||
1215 | #define SETUP_VPORT_ATTRIBUTE_WR(field) \ | |
ee959b00 | 1216 | i->private_vport_attrs[count] = device_attr_vport_##field; \ |
a53eb5e0 JS |
1217 | i->vport_attrs[count] = &i->private_vport_attrs[count]; \ |
1218 | if (i->f->field) \ | |
1219 | count++ | |
1220 | /* NOTE: Above MACRO differs: checks function */ | |
1221 | ||
1222 | #define SETUP_VPORT_ATTRIBUTE_RW(field) \ | |
ee959b00 | 1223 | i->private_vport_attrs[count] = device_attr_vport_##field; \ |
a53eb5e0 JS |
1224 | if (!i->f->set_vport_##field) { \ |
1225 | i->private_vport_attrs[count].attr.mode = S_IRUGO; \ | |
1226 | i->private_vport_attrs[count].store = NULL; \ | |
1227 | } \ | |
1228 | i->vport_attrs[count] = &i->private_vport_attrs[count]; \ | |
1229 | count++ | |
1230 | /* NOTE: Above MACRO differs: does not check show bit */ | |
1231 | ||
1232 | #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RW(field) \ | |
1233 | { \ | |
ee959b00 | 1234 | i->private_vport_attrs[count] = device_attr_vport_##field; \ |
a53eb5e0 JS |
1235 | i->vport_attrs[count] = &i->private_vport_attrs[count]; \ |
1236 | count++; \ | |
1237 | } | |
1238 | ||
1239 | ||
1240 | /* The FC Transport Virtual Port Attributes: */ | |
1241 | ||
1242 | /* Fixed Virtual Port Attributes */ | |
1243 | ||
1244 | /* Dynamic Virtual Port Attributes */ | |
1245 | ||
1246 | /* Private Virtual Port Attributes */ | |
1247 | ||
1248 | fc_private_vport_rd_enum_attr(vport_state, FC_VPORTSTATE_MAX_NAMELEN); | |
1249 | fc_private_vport_rd_enum_attr(vport_last_state, FC_VPORTSTATE_MAX_NAMELEN); | |
1250 | fc_private_vport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); | |
1251 | fc_private_vport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); | |
1252 | ||
1253 | static ssize_t | |
ee959b00 TJ |
1254 | show_fc_vport_roles (struct device *dev, struct device_attribute *attr, |
1255 | char *buf) | |
a53eb5e0 | 1256 | { |
ee959b00 | 1257 | struct fc_vport *vport = transport_class_to_vport(dev); |
a53eb5e0 JS |
1258 | |
1259 | if (vport->roles == FC_PORT_ROLE_UNKNOWN) | |
1260 | return snprintf(buf, 20, "unknown\n"); | |
1261 | return get_fc_port_roles_names(vport->roles, buf); | |
1262 | } | |
ee959b00 | 1263 | static FC_DEVICE_ATTR(vport, roles, S_IRUGO, show_fc_vport_roles, NULL); |
a53eb5e0 JS |
1264 | |
1265 | fc_private_vport_rd_enum_attr(vport_type, FC_PORTTYPE_MAX_NAMELEN); | |
1266 | ||
1267 | fc_private_vport_show_function(symbolic_name, "%s\n", | |
1268 | FC_VPORT_SYMBOLIC_NAMELEN + 1, ) | |
1269 | fc_vport_store_str_function(symbolic_name, FC_VPORT_SYMBOLIC_NAMELEN) | |
ee959b00 | 1270 | static FC_DEVICE_ATTR(vport, symbolic_name, S_IRUGO | S_IWUSR, |
a53eb5e0 JS |
1271 | show_fc_vport_symbolic_name, store_fc_vport_symbolic_name); |
1272 | ||
1273 | static ssize_t | |
ee959b00 TJ |
1274 | store_fc_vport_delete(struct device *dev, struct device_attribute *attr, |
1275 | const char *buf, size_t count) | |
a53eb5e0 | 1276 | { |
ee959b00 | 1277 | struct fc_vport *vport = transport_class_to_vport(dev); |
9ef3e4a4 | 1278 | struct Scsi_Host *shost = vport_to_shost(vport); |
0d9dc7c8 GR |
1279 | unsigned long flags; |
1280 | ||
1281 | spin_lock_irqsave(shost->host_lock, flags); | |
1282 | if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) { | |
1283 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1284 | return -EBUSY; | |
1285 | } | |
1286 | vport->flags |= FC_VPORT_DELETING; | |
1287 | spin_unlock_irqrestore(shost->host_lock, flags); | |
a53eb5e0 | 1288 | |
9ef3e4a4 | 1289 | fc_queue_work(shost, &vport->vport_delete_work); |
a53eb5e0 JS |
1290 | return count; |
1291 | } | |
ee959b00 | 1292 | static FC_DEVICE_ATTR(vport, vport_delete, S_IWUSR, |
a53eb5e0 JS |
1293 | NULL, store_fc_vport_delete); |
1294 | ||
1295 | ||
1296 | /* | |
1297 | * Enable/Disable vport | |
1298 | * Write "1" to disable, write "0" to enable | |
1299 | */ | |
1300 | static ssize_t | |
ee959b00 TJ |
1301 | store_fc_vport_disable(struct device *dev, struct device_attribute *attr, |
1302 | const char *buf, | |
a53eb5e0 JS |
1303 | size_t count) |
1304 | { | |
ee959b00 | 1305 | struct fc_vport *vport = transport_class_to_vport(dev); |
a53eb5e0 JS |
1306 | struct Scsi_Host *shost = vport_to_shost(vport); |
1307 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
1308 | int stat; | |
1309 | ||
1310 | if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) | |
1311 | return -EBUSY; | |
1312 | ||
1313 | if (*buf == '0') { | |
1314 | if (vport->vport_state != FC_VPORT_DISABLED) | |
1315 | return -EALREADY; | |
1316 | } else if (*buf == '1') { | |
1317 | if (vport->vport_state == FC_VPORT_DISABLED) | |
1318 | return -EALREADY; | |
1319 | } else | |
1320 | return -EINVAL; | |
1321 | ||
1322 | stat = i->f->vport_disable(vport, ((*buf == '0') ? false : true)); | |
1323 | return stat ? stat : count; | |
1324 | } | |
ee959b00 | 1325 | static FC_DEVICE_ATTR(vport, vport_disable, S_IWUSR, |
a53eb5e0 JS |
1326 | NULL, store_fc_vport_disable); |
1327 | ||
1328 | ||
1da177e4 LT |
1329 | /* |
1330 | * Host Attribute Management | |
1331 | */ | |
1332 | ||
1333 | #define fc_host_show_function(field, format_string, sz, cast) \ | |
1334 | static ssize_t \ | |
ee959b00 TJ |
1335 | show_fc_host_##field (struct device *dev, \ |
1336 | struct device_attribute *attr, char *buf) \ | |
1da177e4 | 1337 | { \ |
ee959b00 | 1338 | struct Scsi_Host *shost = transport_class_to_shost(dev); \ |
1da177e4 LT |
1339 | struct fc_internal *i = to_fc_internal(shost->transportt); \ |
1340 | if (i->f->get_host_##field) \ | |
1341 | i->f->get_host_##field(shost); \ | |
1342 | return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \ | |
1343 | } | |
1344 | ||
1345 | #define fc_host_store_function(field) \ | |
1346 | static ssize_t \ | |
ee959b00 TJ |
1347 | store_fc_host_##field(struct device *dev, \ |
1348 | struct device_attribute *attr, \ | |
1349 | const char *buf, size_t count) \ | |
1da177e4 LT |
1350 | { \ |
1351 | int val; \ | |
ee959b00 | 1352 | struct Scsi_Host *shost = transport_class_to_shost(dev); \ |
1da177e4 | 1353 | struct fc_internal *i = to_fc_internal(shost->transportt); \ |
0f29b966 | 1354 | char *cp; \ |
1da177e4 | 1355 | \ |
0f29b966 JS |
1356 | val = simple_strtoul(buf, &cp, 0); \ |
1357 | if (*cp && (*cp != '\n')) \ | |
1358 | return -EINVAL; \ | |
1da177e4 LT |
1359 | i->f->set_host_##field(shost, val); \ |
1360 | return count; \ | |
1361 | } | |
1362 | ||
b8d08210 JS |
1363 | #define fc_host_store_str_function(field, slen) \ |
1364 | static ssize_t \ | |
ee959b00 TJ |
1365 | store_fc_host_##field(struct device *dev, \ |
1366 | struct device_attribute *attr, \ | |
1367 | const char *buf, size_t count) \ | |
b8d08210 | 1368 | { \ |
ee959b00 | 1369 | struct Scsi_Host *shost = transport_class_to_shost(dev); \ |
b8d08210 JS |
1370 | struct fc_internal *i = to_fc_internal(shost->transportt); \ |
1371 | unsigned int cnt=count; \ | |
1372 | \ | |
1373 | /* count may include a LF at end of string */ \ | |
1374 | if (buf[cnt-1] == '\n') \ | |
1375 | cnt--; \ | |
1376 | if (cnt > ((slen) - 1)) \ | |
1377 | return -EINVAL; \ | |
1378 | memcpy(fc_host_##field(shost), buf, cnt); \ | |
1379 | i->f->set_host_##field(shost); \ | |
1380 | return count; \ | |
1381 | } | |
1382 | ||
1da177e4 LT |
1383 | #define fc_host_rd_attr(field, format_string, sz) \ |
1384 | fc_host_show_function(field, format_string, sz, ) \ | |
ee959b00 | 1385 | static FC_DEVICE_ATTR(host, field, S_IRUGO, \ |
1da177e4 LT |
1386 | show_fc_host_##field, NULL) |
1387 | ||
1388 | #define fc_host_rd_attr_cast(field, format_string, sz, cast) \ | |
1389 | fc_host_show_function(field, format_string, sz, (cast)) \ | |
ee959b00 | 1390 | static FC_DEVICE_ATTR(host, field, S_IRUGO, \ |
1da177e4 LT |
1391 | show_fc_host_##field, NULL) |
1392 | ||
1393 | #define fc_host_rw_attr(field, format_string, sz) \ | |
1394 | fc_host_show_function(field, format_string, sz, ) \ | |
1395 | fc_host_store_function(field) \ | |
ee959b00 | 1396 | static FC_DEVICE_ATTR(host, field, S_IRUGO | S_IWUSR, \ |
1da177e4 LT |
1397 | show_fc_host_##field, \ |
1398 | store_fc_host_##field) | |
1399 | ||
1400 | #define fc_host_rd_enum_attr(title, maxlen) \ | |
1401 | static ssize_t \ | |
ee959b00 TJ |
1402 | show_fc_host_##title (struct device *dev, \ |
1403 | struct device_attribute *attr, char *buf) \ | |
1da177e4 | 1404 | { \ |
ee959b00 | 1405 | struct Scsi_Host *shost = transport_class_to_shost(dev); \ |
1da177e4 LT |
1406 | struct fc_internal *i = to_fc_internal(shost->transportt); \ |
1407 | const char *name; \ | |
1408 | if (i->f->get_host_##title) \ | |
1409 | i->f->get_host_##title(shost); \ | |
1410 | name = get_fc_##title##_name(fc_host_##title(shost)); \ | |
1411 | if (!name) \ | |
1412 | return -EINVAL; \ | |
1413 | return snprintf(buf, maxlen, "%s\n", name); \ | |
1414 | } \ | |
ee959b00 | 1415 | static FC_DEVICE_ATTR(host, title, S_IRUGO, show_fc_host_##title, NULL) |
1da177e4 LT |
1416 | |
1417 | #define SETUP_HOST_ATTRIBUTE_RD(field) \ | |
ee959b00 | 1418 | i->private_host_attrs[count] = device_attr_host_##field; \ |
1da177e4 LT |
1419 | i->private_host_attrs[count].attr.mode = S_IRUGO; \ |
1420 | i->private_host_attrs[count].store = NULL; \ | |
1421 | i->host_attrs[count] = &i->private_host_attrs[count]; \ | |
1422 | if (i->f->show_host_##field) \ | |
1423 | count++ | |
1424 | ||
a53eb5e0 | 1425 | #define SETUP_HOST_ATTRIBUTE_RD_NS(field) \ |
ee959b00 | 1426 | i->private_host_attrs[count] = device_attr_host_##field; \ |
a53eb5e0 JS |
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 | ||
1da177e4 | 1432 | #define SETUP_HOST_ATTRIBUTE_RW(field) \ |
ee959b00 | 1433 | i->private_host_attrs[count] = device_attr_host_##field; \ |
1da177e4 LT |
1434 | if (!i->f->set_host_##field) { \ |
1435 | i->private_host_attrs[count].attr.mode = S_IRUGO; \ | |
1436 | i->private_host_attrs[count].store = NULL; \ | |
1437 | } \ | |
1438 | i->host_attrs[count] = &i->private_host_attrs[count]; \ | |
1439 | if (i->f->show_host_##field) \ | |
1440 | count++ | |
1441 | ||
1442 | ||
1443 | #define fc_private_host_show_function(field, format_string, sz, cast) \ | |
1444 | static ssize_t \ | |
ee959b00 TJ |
1445 | show_fc_host_##field (struct device *dev, \ |
1446 | struct device_attribute *attr, char *buf) \ | |
1da177e4 | 1447 | { \ |
ee959b00 | 1448 | struct Scsi_Host *shost = transport_class_to_shost(dev); \ |
1da177e4 LT |
1449 | return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \ |
1450 | } | |
1451 | ||
1452 | #define fc_private_host_rd_attr(field, format_string, sz) \ | |
1453 | fc_private_host_show_function(field, format_string, sz, ) \ | |
ee959b00 | 1454 | static FC_DEVICE_ATTR(host, field, S_IRUGO, \ |
1da177e4 LT |
1455 | show_fc_host_##field, NULL) |
1456 | ||
1457 | #define fc_private_host_rd_attr_cast(field, format_string, sz, cast) \ | |
1458 | fc_private_host_show_function(field, format_string, sz, (cast)) \ | |
ee959b00 | 1459 | static FC_DEVICE_ATTR(host, field, S_IRUGO, \ |
1da177e4 LT |
1460 | show_fc_host_##field, NULL) |
1461 | ||
1462 | #define SETUP_PRIVATE_HOST_ATTRIBUTE_RD(field) \ | |
ee959b00 | 1463 | i->private_host_attrs[count] = device_attr_host_##field; \ |
1da177e4 LT |
1464 | i->private_host_attrs[count].attr.mode = S_IRUGO; \ |
1465 | i->private_host_attrs[count].store = NULL; \ | |
1466 | i->host_attrs[count] = &i->private_host_attrs[count]; \ | |
1467 | count++ | |
1468 | ||
1469 | #define SETUP_PRIVATE_HOST_ATTRIBUTE_RW(field) \ | |
91ca7b01 | 1470 | { \ |
ee959b00 | 1471 | i->private_host_attrs[count] = device_attr_host_##field; \ |
1da177e4 | 1472 | i->host_attrs[count] = &i->private_host_attrs[count]; \ |
91ca7b01 AV |
1473 | count++; \ |
1474 | } | |
1da177e4 LT |
1475 | |
1476 | ||
1477 | /* Fixed Host Attributes */ | |
1478 | ||
1479 | static ssize_t | |
ee959b00 TJ |
1480 | show_fc_host_supported_classes (struct device *dev, |
1481 | struct device_attribute *attr, char *buf) | |
1da177e4 | 1482 | { |
ee959b00 | 1483 | struct Scsi_Host *shost = transport_class_to_shost(dev); |
1da177e4 LT |
1484 | |
1485 | if (fc_host_supported_classes(shost) == FC_COS_UNSPECIFIED) | |
1486 | return snprintf(buf, 20, "unspecified\n"); | |
1487 | ||
1488 | return get_fc_cos_names(fc_host_supported_classes(shost), buf); | |
1489 | } | |
ee959b00 | 1490 | static FC_DEVICE_ATTR(host, supported_classes, S_IRUGO, |
1da177e4 LT |
1491 | show_fc_host_supported_classes, NULL); |
1492 | ||
1493 | static ssize_t | |
ee959b00 TJ |
1494 | show_fc_host_supported_fc4s (struct device *dev, |
1495 | struct device_attribute *attr, char *buf) | |
1da177e4 | 1496 | { |
ee959b00 | 1497 | struct Scsi_Host *shost = transport_class_to_shost(dev); |
1da177e4 LT |
1498 | return (ssize_t)show_fc_fc4s(buf, fc_host_supported_fc4s(shost)); |
1499 | } | |
ee959b00 | 1500 | static FC_DEVICE_ATTR(host, supported_fc4s, S_IRUGO, |
1da177e4 LT |
1501 | show_fc_host_supported_fc4s, NULL); |
1502 | ||
1503 | static ssize_t | |
ee959b00 TJ |
1504 | show_fc_host_supported_speeds (struct device *dev, |
1505 | struct device_attribute *attr, char *buf) | |
1da177e4 | 1506 | { |
ee959b00 | 1507 | struct Scsi_Host *shost = transport_class_to_shost(dev); |
1da177e4 LT |
1508 | |
1509 | if (fc_host_supported_speeds(shost) == FC_PORTSPEED_UNKNOWN) | |
1510 | return snprintf(buf, 20, "unknown\n"); | |
1511 | ||
1512 | return get_fc_port_speed_names(fc_host_supported_speeds(shost), buf); | |
1513 | } | |
ee959b00 | 1514 | static FC_DEVICE_ATTR(host, supported_speeds, S_IRUGO, |
1da177e4 LT |
1515 | show_fc_host_supported_speeds, NULL); |
1516 | ||
1517 | ||
1518 | fc_private_host_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); | |
1519 | fc_private_host_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); | |
6b7281d0 AH |
1520 | fc_private_host_rd_attr_cast(permanent_port_name, "0x%llx\n", 20, |
1521 | unsigned long long); | |
1da177e4 | 1522 | fc_private_host_rd_attr(maxframe_size, "%u bytes\n", 20); |
a53eb5e0 | 1523 | fc_private_host_rd_attr(max_npiv_vports, "%u\n", 20); |
1da177e4 | 1524 | fc_private_host_rd_attr(serial_number, "%s\n", (FC_SERIAL_NUMBER_SIZE +1)); |
bb8ef587 NP |
1525 | fc_private_host_rd_attr(manufacturer, "%s\n", FC_SERIAL_NUMBER_SIZE + 1); |
1526 | fc_private_host_rd_attr(model, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1); | |
1527 | fc_private_host_rd_attr(model_description, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1); | |
1528 | fc_private_host_rd_attr(hardware_version, "%s\n", FC_VERSION_STRING_SIZE + 1); | |
1529 | fc_private_host_rd_attr(driver_version, "%s\n", FC_VERSION_STRING_SIZE + 1); | |
1530 | fc_private_host_rd_attr(firmware_version, "%s\n", FC_VERSION_STRING_SIZE + 1); | |
1531 | fc_private_host_rd_attr(optionrom_version, "%s\n", FC_VERSION_STRING_SIZE + 1); | |
1da177e4 LT |
1532 | |
1533 | ||
1534 | /* Dynamic Host Attributes */ | |
1535 | ||
1536 | static ssize_t | |
ee959b00 TJ |
1537 | show_fc_host_active_fc4s (struct device *dev, |
1538 | struct device_attribute *attr, char *buf) | |
1da177e4 | 1539 | { |
ee959b00 | 1540 | struct Scsi_Host *shost = transport_class_to_shost(dev); |
1da177e4 LT |
1541 | struct fc_internal *i = to_fc_internal(shost->transportt); |
1542 | ||
1543 | if (i->f->get_host_active_fc4s) | |
1544 | i->f->get_host_active_fc4s(shost); | |
1545 | ||
1546 | return (ssize_t)show_fc_fc4s(buf, fc_host_active_fc4s(shost)); | |
1547 | } | |
ee959b00 | 1548 | static FC_DEVICE_ATTR(host, active_fc4s, S_IRUGO, |
1da177e4 LT |
1549 | show_fc_host_active_fc4s, NULL); |
1550 | ||
1551 | static ssize_t | |
ee959b00 TJ |
1552 | show_fc_host_speed (struct device *dev, |
1553 | struct device_attribute *attr, char *buf) | |
1da177e4 | 1554 | { |
ee959b00 | 1555 | struct Scsi_Host *shost = transport_class_to_shost(dev); |
1da177e4 LT |
1556 | struct fc_internal *i = to_fc_internal(shost->transportt); |
1557 | ||
1558 | if (i->f->get_host_speed) | |
1559 | i->f->get_host_speed(shost); | |
1560 | ||
1561 | if (fc_host_speed(shost) == FC_PORTSPEED_UNKNOWN) | |
1562 | return snprintf(buf, 20, "unknown\n"); | |
1563 | ||
1564 | return get_fc_port_speed_names(fc_host_speed(shost), buf); | |
1565 | } | |
ee959b00 | 1566 | static FC_DEVICE_ATTR(host, speed, S_IRUGO, |
1da177e4 LT |
1567 | show_fc_host_speed, NULL); |
1568 | ||
1569 | ||
1570 | fc_host_rd_attr(port_id, "0x%06x\n", 20); | |
1571 | fc_host_rd_enum_attr(port_type, FC_PORTTYPE_MAX_NAMELEN); | |
1572 | fc_host_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN); | |
1573 | fc_host_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long); | |
016131b8 | 1574 | fc_host_rd_attr(symbolic_name, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1); |
1da177e4 | 1575 | |
b8d08210 JS |
1576 | fc_private_host_show_function(system_hostname, "%s\n", |
1577 | FC_SYMBOLIC_NAME_SIZE + 1, ) | |
1578 | fc_host_store_str_function(system_hostname, FC_SYMBOLIC_NAME_SIZE) | |
ee959b00 | 1579 | static FC_DEVICE_ATTR(host, system_hostname, S_IRUGO | S_IWUSR, |
b8d08210 JS |
1580 | show_fc_host_system_hostname, store_fc_host_system_hostname); |
1581 | ||
1da177e4 LT |
1582 | |
1583 | /* Private Host Attributes */ | |
1584 | ||
1585 | static ssize_t | |
ee959b00 TJ |
1586 | show_fc_private_host_tgtid_bind_type(struct device *dev, |
1587 | struct device_attribute *attr, char *buf) | |
1da177e4 | 1588 | { |
ee959b00 | 1589 | struct Scsi_Host *shost = transport_class_to_shost(dev); |
1da177e4 LT |
1590 | const char *name; |
1591 | ||
1592 | name = get_fc_tgtid_bind_type_name(fc_host_tgtid_bind_type(shost)); | |
1593 | if (!name) | |
1594 | return -EINVAL; | |
1595 | return snprintf(buf, FC_BINDTYPE_MAX_NAMELEN, "%s\n", name); | |
1596 | } | |
1597 | ||
d16794f6 JSEC |
1598 | #define get_list_head_entry(pos, head, member) \ |
1599 | pos = list_entry((head)->next, typeof(*pos), member) | |
1600 | ||
1da177e4 | 1601 | static ssize_t |
ee959b00 TJ |
1602 | store_fc_private_host_tgtid_bind_type(struct device *dev, |
1603 | struct device_attribute *attr, const char *buf, size_t count) | |
1da177e4 | 1604 | { |
ee959b00 | 1605 | struct Scsi_Host *shost = transport_class_to_shost(dev); |
d16794f6 | 1606 | struct fc_rport *rport; |
1da177e4 LT |
1607 | enum fc_tgtid_binding_type val; |
1608 | unsigned long flags; | |
1609 | ||
1610 | if (get_fc_tgtid_bind_type_match(buf, &val)) | |
1611 | return -EINVAL; | |
1612 | ||
1613 | /* if changing bind type, purge all unused consistent bindings */ | |
1614 | if (val != fc_host_tgtid_bind_type(shost)) { | |
1615 | spin_lock_irqsave(shost->host_lock, flags); | |
d16794f6 JSEC |
1616 | while (!list_empty(&fc_host_rport_bindings(shost))) { |
1617 | get_list_head_entry(rport, | |
1618 | &fc_host_rport_bindings(shost), peers); | |
aedf3497 JS |
1619 | list_del(&rport->peers); |
1620 | rport->port_state = FC_PORTSTATE_DELETED; | |
1621 | fc_queue_work(shost, &rport->rport_delete_work); | |
d16794f6 | 1622 | } |
1da177e4 LT |
1623 | spin_unlock_irqrestore(shost->host_lock, flags); |
1624 | } | |
1625 | ||
1626 | fc_host_tgtid_bind_type(shost) = val; | |
1627 | return count; | |
1628 | } | |
1629 | ||
ee959b00 | 1630 | static FC_DEVICE_ATTR(host, tgtid_bind_type, S_IRUGO | S_IWUSR, |
1da177e4 LT |
1631 | show_fc_private_host_tgtid_bind_type, |
1632 | store_fc_private_host_tgtid_bind_type); | |
1633 | ||
91ca7b01 | 1634 | static ssize_t |
ee959b00 TJ |
1635 | store_fc_private_host_issue_lip(struct device *dev, |
1636 | struct device_attribute *attr, const char *buf, size_t count) | |
91ca7b01 | 1637 | { |
ee959b00 | 1638 | struct Scsi_Host *shost = transport_class_to_shost(dev); |
91ca7b01 AV |
1639 | struct fc_internal *i = to_fc_internal(shost->transportt); |
1640 | int ret; | |
1641 | ||
1642 | /* ignore any data value written to the attribute */ | |
1643 | if (i->f->issue_fc_host_lip) { | |
1644 | ret = i->f->issue_fc_host_lip(shost); | |
1645 | return ret ? ret: count; | |
1646 | } | |
1647 | ||
1648 | return -ENOENT; | |
1649 | } | |
1650 | ||
ee959b00 | 1651 | static FC_DEVICE_ATTR(host, issue_lip, S_IWUSR, NULL, |
91ca7b01 AV |
1652 | store_fc_private_host_issue_lip); |
1653 | ||
43ca910a MC |
1654 | static ssize_t |
1655 | store_fc_private_host_dev_loss_tmo(struct device *dev, | |
1656 | struct device_attribute *attr, | |
1657 | const char *buf, size_t count) | |
1658 | { | |
1659 | struct Scsi_Host *shost = transport_class_to_shost(dev); | |
1660 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); | |
1661 | struct fc_rport *rport; | |
1662 | unsigned long val, flags; | |
1663 | int rc; | |
1664 | ||
1665 | rc = fc_str_to_dev_loss(buf, &val); | |
1666 | if (rc) | |
1667 | return rc; | |
1668 | ||
1669 | fc_host_dev_loss_tmo(shost) = val; | |
1670 | spin_lock_irqsave(shost->host_lock, flags); | |
1671 | list_for_each_entry(rport, &fc_host->rports, peers) | |
1672 | fc_rport_set_dev_loss_tmo(rport, val); | |
1673 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1674 | return count; | |
1675 | } | |
a53eb5e0 | 1676 | |
43ca910a MC |
1677 | fc_private_host_show_function(dev_loss_tmo, "%d\n", 20, ); |
1678 | static FC_DEVICE_ATTR(host, dev_loss_tmo, S_IRUGO | S_IWUSR, | |
1679 | show_fc_host_dev_loss_tmo, | |
1680 | store_fc_private_host_dev_loss_tmo); | |
1681 | ||
1682 | fc_private_host_rd_attr(npiv_vports_inuse, "%u\n", 20); | |
a53eb5e0 | 1683 | |
1da177e4 LT |
1684 | /* |
1685 | * Host Statistics Management | |
1686 | */ | |
1687 | ||
1688 | /* Show a given an attribute in the statistics group */ | |
1689 | static ssize_t | |
ee959b00 | 1690 | fc_stat_show(const struct device *dev, char *buf, unsigned long offset) |
1da177e4 | 1691 | { |
ee959b00 | 1692 | struct Scsi_Host *shost = transport_class_to_shost(dev); |
1da177e4 LT |
1693 | struct fc_internal *i = to_fc_internal(shost->transportt); |
1694 | struct fc_host_statistics *stats; | |
1695 | ssize_t ret = -ENOENT; | |
1696 | ||
1697 | if (offset > sizeof(struct fc_host_statistics) || | |
1698 | offset % sizeof(u64) != 0) | |
1699 | WARN_ON(1); | |
1700 | ||
1701 | if (i->f->get_fc_host_stats) { | |
1702 | stats = (i->f->get_fc_host_stats)(shost); | |
1703 | if (stats) | |
1704 | ret = snprintf(buf, 20, "0x%llx\n", | |
1705 | (unsigned long long)*(u64 *)(((u8 *) stats) + offset)); | |
1706 | } | |
1707 | return ret; | |
1708 | } | |
1709 | ||
1710 | ||
1711 | /* generate a read-only statistics attribute */ | |
1712 | #define fc_host_statistic(name) \ | |
ee959b00 TJ |
1713 | static ssize_t show_fcstat_##name(struct device *cd, \ |
1714 | struct device_attribute *attr, \ | |
1715 | char *buf) \ | |
1da177e4 LT |
1716 | { \ |
1717 | return fc_stat_show(cd, buf, \ | |
1718 | offsetof(struct fc_host_statistics, name)); \ | |
1719 | } \ | |
ee959b00 | 1720 | static FC_DEVICE_ATTR(host, name, S_IRUGO, show_fcstat_##name, NULL) |
1da177e4 LT |
1721 | |
1722 | fc_host_statistic(seconds_since_last_reset); | |
1723 | fc_host_statistic(tx_frames); | |
1724 | fc_host_statistic(tx_words); | |
1725 | fc_host_statistic(rx_frames); | |
1726 | fc_host_statistic(rx_words); | |
1727 | fc_host_statistic(lip_count); | |
1728 | fc_host_statistic(nos_count); | |
1729 | fc_host_statistic(error_frames); | |
1730 | fc_host_statistic(dumped_frames); | |
1731 | fc_host_statistic(link_failure_count); | |
1732 | fc_host_statistic(loss_of_sync_count); | |
1733 | fc_host_statistic(loss_of_signal_count); | |
1734 | fc_host_statistic(prim_seq_protocol_err_count); | |
1735 | fc_host_statistic(invalid_tx_word_count); | |
1736 | fc_host_statistic(invalid_crc_count); | |
1737 | fc_host_statistic(fcp_input_requests); | |
1738 | fc_host_statistic(fcp_output_requests); | |
1739 | fc_host_statistic(fcp_control_requests); | |
1740 | fc_host_statistic(fcp_input_megabytes); | |
1741 | fc_host_statistic(fcp_output_megabytes); | |
e58abb0c VD |
1742 | fc_host_statistic(fcp_packet_alloc_failures); |
1743 | fc_host_statistic(fcp_packet_aborts); | |
1744 | fc_host_statistic(fcp_frame_alloc_failures); | |
1745 | fc_host_statistic(fc_no_free_exch); | |
1746 | fc_host_statistic(fc_no_free_exch_xid); | |
1747 | fc_host_statistic(fc_xid_not_found); | |
1748 | fc_host_statistic(fc_xid_busy); | |
1749 | fc_host_statistic(fc_seq_not_found); | |
1750 | fc_host_statistic(fc_non_bls_resp); | |
1da177e4 LT |
1751 | |
1752 | static ssize_t | |
ee959b00 TJ |
1753 | fc_reset_statistics(struct device *dev, struct device_attribute *attr, |
1754 | const char *buf, size_t count) | |
1da177e4 | 1755 | { |
ee959b00 | 1756 | struct Scsi_Host *shost = transport_class_to_shost(dev); |
1da177e4 LT |
1757 | struct fc_internal *i = to_fc_internal(shost->transportt); |
1758 | ||
1759 | /* ignore any data value written to the attribute */ | |
1760 | if (i->f->reset_fc_host_stats) { | |
1761 | i->f->reset_fc_host_stats(shost); | |
1762 | return count; | |
1763 | } | |
1764 | ||
1765 | return -ENOENT; | |
1766 | } | |
ee959b00 | 1767 | static FC_DEVICE_ATTR(host, reset_statistics, S_IWUSR, NULL, |
1da177e4 LT |
1768 | fc_reset_statistics); |
1769 | ||
1da177e4 | 1770 | static struct attribute *fc_statistics_attrs[] = { |
ee959b00 TJ |
1771 | &device_attr_host_seconds_since_last_reset.attr, |
1772 | &device_attr_host_tx_frames.attr, | |
1773 | &device_attr_host_tx_words.attr, | |
1774 | &device_attr_host_rx_frames.attr, | |
1775 | &device_attr_host_rx_words.attr, | |
1776 | &device_attr_host_lip_count.attr, | |
1777 | &device_attr_host_nos_count.attr, | |
1778 | &device_attr_host_error_frames.attr, | |
1779 | &device_attr_host_dumped_frames.attr, | |
1780 | &device_attr_host_link_failure_count.attr, | |
1781 | &device_attr_host_loss_of_sync_count.attr, | |
1782 | &device_attr_host_loss_of_signal_count.attr, | |
1783 | &device_attr_host_prim_seq_protocol_err_count.attr, | |
1784 | &device_attr_host_invalid_tx_word_count.attr, | |
1785 | &device_attr_host_invalid_crc_count.attr, | |
1786 | &device_attr_host_fcp_input_requests.attr, | |
1787 | &device_attr_host_fcp_output_requests.attr, | |
1788 | &device_attr_host_fcp_control_requests.attr, | |
1789 | &device_attr_host_fcp_input_megabytes.attr, | |
1790 | &device_attr_host_fcp_output_megabytes.attr, | |
e58abb0c VD |
1791 | &device_attr_host_fcp_packet_alloc_failures.attr, |
1792 | &device_attr_host_fcp_packet_aborts.attr, | |
1793 | &device_attr_host_fcp_frame_alloc_failures.attr, | |
1794 | &device_attr_host_fc_no_free_exch.attr, | |
1795 | &device_attr_host_fc_no_free_exch_xid.attr, | |
1796 | &device_attr_host_fc_xid_not_found.attr, | |
1797 | &device_attr_host_fc_xid_busy.attr, | |
1798 | &device_attr_host_fc_seq_not_found.attr, | |
1799 | &device_attr_host_fc_non_bls_resp.attr, | |
ee959b00 | 1800 | &device_attr_host_reset_statistics.attr, |
1da177e4 LT |
1801 | NULL |
1802 | }; | |
1803 | ||
1804 | static struct attribute_group fc_statistics_group = { | |
1805 | .name = "statistics", | |
1806 | .attrs = fc_statistics_attrs, | |
1807 | }; | |
1808 | ||
a53eb5e0 JS |
1809 | |
1810 | /* Host Vport Attributes */ | |
1811 | ||
1812 | static int | |
1813 | fc_parse_wwn(const char *ns, u64 *nm) | |
1814 | { | |
1815 | unsigned int i, j; | |
1816 | u8 wwn[8]; | |
1817 | ||
1818 | memset(wwn, 0, sizeof(wwn)); | |
1819 | ||
1820 | /* Validate and store the new name */ | |
1821 | for (i=0, j=0; i < 16; i++) { | |
ecc30990 AS |
1822 | int value; |
1823 | ||
1824 | value = hex_to_bin(*ns++); | |
1825 | if (value >= 0) | |
1826 | j = (j << 4) | value; | |
a53eb5e0 JS |
1827 | else |
1828 | return -EINVAL; | |
1829 | if (i % 2) { | |
1830 | wwn[i/2] = j & 0xff; | |
1831 | j = 0; | |
1832 | } | |
1833 | } | |
1834 | ||
1835 | *nm = wwn_to_u64(wwn); | |
1836 | ||
1837 | return 0; | |
1838 | } | |
1839 | ||
1840 | ||
1841 | /* | |
1842 | * "Short-cut" sysfs variable to create a new vport on a FC Host. | |
1843 | * Input is a string of the form "<WWPN>:<WWNN>". Other attributes | |
1844 | * will default to a NPIV-based FCP_Initiator; The WWNs are specified | |
1845 | * as hex characters, and may *not* contain any prefixes (e.g. 0x, x, etc) | |
1846 | */ | |
1847 | static ssize_t | |
ee959b00 TJ |
1848 | store_fc_host_vport_create(struct device *dev, struct device_attribute *attr, |
1849 | const char *buf, size_t count) | |
a53eb5e0 | 1850 | { |
ee959b00 | 1851 | struct Scsi_Host *shost = transport_class_to_shost(dev); |
a53eb5e0 JS |
1852 | struct fc_vport_identifiers vid; |
1853 | struct fc_vport *vport; | |
1854 | unsigned int cnt=count; | |
1855 | int stat; | |
1856 | ||
1857 | memset(&vid, 0, sizeof(vid)); | |
1858 | ||
1859 | /* count may include a LF at end of string */ | |
1860 | if (buf[cnt-1] == '\n') | |
1861 | cnt--; | |
1862 | ||
1863 | /* validate we have enough characters for WWPN */ | |
1864 | if ((cnt != (16+1+16)) || (buf[16] != ':')) | |
1865 | return -EINVAL; | |
1866 | ||
1867 | stat = fc_parse_wwn(&buf[0], &vid.port_name); | |
1868 | if (stat) | |
1869 | return stat; | |
1870 | ||
1871 | stat = fc_parse_wwn(&buf[17], &vid.node_name); | |
1872 | if (stat) | |
1873 | return stat; | |
1874 | ||
1875 | vid.roles = FC_PORT_ROLE_FCP_INITIATOR; | |
1876 | vid.vport_type = FC_PORTTYPE_NPIV; | |
1877 | /* vid.symbolic_name is already zero/NULL's */ | |
1878 | vid.disable = false; /* always enabled */ | |
1879 | ||
1880 | /* we only allow support on Channel 0 !!! */ | |
a30c3f69 | 1881 | stat = fc_vport_setup(shost, 0, &shost->shost_gendev, &vid, &vport); |
a53eb5e0 JS |
1882 | return stat ? stat : count; |
1883 | } | |
ee959b00 | 1884 | static FC_DEVICE_ATTR(host, vport_create, S_IWUSR, NULL, |
a53eb5e0 JS |
1885 | store_fc_host_vport_create); |
1886 | ||
1887 | ||
1888 | /* | |
1889 | * "Short-cut" sysfs variable to delete a vport on a FC Host. | |
1890 | * Vport is identified by a string containing "<WWPN>:<WWNN>". | |
1891 | * The WWNs are specified as hex characters, and may *not* contain | |
1892 | * any prefixes (e.g. 0x, x, etc) | |
1893 | */ | |
1894 | static ssize_t | |
ee959b00 TJ |
1895 | store_fc_host_vport_delete(struct device *dev, struct device_attribute *attr, |
1896 | const char *buf, size_t count) | |
a53eb5e0 | 1897 | { |
ee959b00 | 1898 | struct Scsi_Host *shost = transport_class_to_shost(dev); |
a53eb5e0 JS |
1899 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
1900 | struct fc_vport *vport; | |
1901 | u64 wwpn, wwnn; | |
1902 | unsigned long flags; | |
1903 | unsigned int cnt=count; | |
1904 | int stat, match; | |
1905 | ||
1906 | /* count may include a LF at end of string */ | |
1907 | if (buf[cnt-1] == '\n') | |
1908 | cnt--; | |
1909 | ||
1910 | /* validate we have enough characters for WWPN */ | |
1911 | if ((cnt != (16+1+16)) || (buf[16] != ':')) | |
1912 | return -EINVAL; | |
1913 | ||
1914 | stat = fc_parse_wwn(&buf[0], &wwpn); | |
1915 | if (stat) | |
1916 | return stat; | |
1917 | ||
1918 | stat = fc_parse_wwn(&buf[17], &wwnn); | |
1919 | if (stat) | |
1920 | return stat; | |
1921 | ||
1922 | spin_lock_irqsave(shost->host_lock, flags); | |
1923 | match = 0; | |
1924 | /* we only allow support on Channel 0 !!! */ | |
1925 | list_for_each_entry(vport, &fc_host->vports, peers) { | |
1926 | if ((vport->channel == 0) && | |
1927 | (vport->port_name == wwpn) && (vport->node_name == wwnn)) { | |
0d9dc7c8 GR |
1928 | if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) |
1929 | break; | |
1930 | vport->flags |= FC_VPORT_DELETING; | |
a53eb5e0 JS |
1931 | match = 1; |
1932 | break; | |
1933 | } | |
1934 | } | |
1935 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1936 | ||
1937 | if (!match) | |
1938 | return -ENODEV; | |
1939 | ||
1940 | stat = fc_vport_terminate(vport); | |
1941 | return stat ? stat : count; | |
1942 | } | |
ee959b00 | 1943 | static FC_DEVICE_ATTR(host, vport_delete, S_IWUSR, NULL, |
a53eb5e0 JS |
1944 | store_fc_host_vport_delete); |
1945 | ||
1946 | ||
1da177e4 LT |
1947 | static int fc_host_match(struct attribute_container *cont, |
1948 | struct device *dev) | |
1949 | { | |
1950 | struct Scsi_Host *shost; | |
1951 | struct fc_internal *i; | |
1952 | ||
1953 | if (!scsi_is_host_device(dev)) | |
1954 | return 0; | |
1955 | ||
1956 | shost = dev_to_shost(dev); | |
1957 | if (!shost->transportt || shost->transportt->host_attrs.ac.class | |
1958 | != &fc_host_class.class) | |
1959 | return 0; | |
1960 | ||
1961 | i = to_fc_internal(shost->transportt); | |
1962 | ||
1963 | return &i->t.host_attrs.ac == cont; | |
1964 | } | |
1965 | ||
1966 | static int fc_target_match(struct attribute_container *cont, | |
1967 | struct device *dev) | |
1968 | { | |
1969 | struct Scsi_Host *shost; | |
1970 | struct fc_internal *i; | |
1971 | ||
1972 | if (!scsi_is_target_device(dev)) | |
1973 | return 0; | |
1974 | ||
1975 | shost = dev_to_shost(dev->parent); | |
1976 | if (!shost->transportt || shost->transportt->host_attrs.ac.class | |
1977 | != &fc_host_class.class) | |
1978 | return 0; | |
1979 | ||
1980 | i = to_fc_internal(shost->transportt); | |
1981 | ||
1982 | return &i->t.target_attrs.ac == cont; | |
1983 | } | |
1984 | ||
1985 | static void fc_rport_dev_release(struct device *dev) | |
1986 | { | |
1987 | struct fc_rport *rport = dev_to_rport(dev); | |
1988 | put_device(dev->parent); | |
1989 | kfree(rport); | |
1990 | } | |
1991 | ||
1992 | int scsi_is_fc_rport(const struct device *dev) | |
1993 | { | |
1994 | return dev->release == fc_rport_dev_release; | |
1995 | } | |
1996 | EXPORT_SYMBOL(scsi_is_fc_rport); | |
1997 | ||
1998 | static int fc_rport_match(struct attribute_container *cont, | |
1999 | struct device *dev) | |
2000 | { | |
2001 | struct Scsi_Host *shost; | |
2002 | struct fc_internal *i; | |
2003 | ||
2004 | if (!scsi_is_fc_rport(dev)) | |
2005 | return 0; | |
2006 | ||
2007 | shost = dev_to_shost(dev->parent); | |
2008 | if (!shost->transportt || shost->transportt->host_attrs.ac.class | |
2009 | != &fc_host_class.class) | |
2010 | return 0; | |
2011 | ||
2012 | i = to_fc_internal(shost->transportt); | |
2013 | ||
2014 | return &i->rport_attr_cont.ac == cont; | |
2015 | } | |
2016 | ||
5c44cd2a | 2017 | |
a53eb5e0 JS |
2018 | static void fc_vport_dev_release(struct device *dev) |
2019 | { | |
2020 | struct fc_vport *vport = dev_to_vport(dev); | |
2021 | put_device(dev->parent); /* release kobj parent */ | |
2022 | kfree(vport); | |
2023 | } | |
2024 | ||
2025 | int scsi_is_fc_vport(const struct device *dev) | |
2026 | { | |
2027 | return dev->release == fc_vport_dev_release; | |
2028 | } | |
2029 | EXPORT_SYMBOL(scsi_is_fc_vport); | |
2030 | ||
2031 | static int fc_vport_match(struct attribute_container *cont, | |
2032 | struct device *dev) | |
2033 | { | |
2034 | struct fc_vport *vport; | |
2035 | struct Scsi_Host *shost; | |
2036 | struct fc_internal *i; | |
2037 | ||
2038 | if (!scsi_is_fc_vport(dev)) | |
2039 | return 0; | |
2040 | vport = dev_to_vport(dev); | |
2041 | ||
2042 | shost = vport_to_shost(vport); | |
2043 | if (!shost->transportt || shost->transportt->host_attrs.ac.class | |
2044 | != &fc_host_class.class) | |
2045 | return 0; | |
2046 | ||
2047 | i = to_fc_internal(shost->transportt); | |
2048 | return &i->vport_attr_cont.ac == cont; | |
2049 | } | |
2050 | ||
2051 | ||
c829c394 JS |
2052 | /** |
2053 | * fc_timed_out - FC Transport I/O timeout intercept handler | |
c829c394 JS |
2054 | * @scmd: The SCSI command which timed out |
2055 | * | |
2056 | * This routine protects against error handlers getting invoked while a | |
2057 | * rport is in a blocked state, typically due to a temporarily loss of | |
2058 | * connectivity. If the error handlers are allowed to proceed, requests | |
2059 | * to abort i/o, reset the target, etc will likely fail as there is no way | |
2060 | * to communicate with the device to perform the requested function. These | |
2061 | * failures may result in the midlayer taking the device offline, requiring | |
2062 | * manual intervention to restore operation. | |
2063 | * | |
2064 | * This routine, called whenever an i/o times out, validates the state of | |
2065 | * the underlying rport. If the rport is blocked, it returns | |
2066 | * EH_RESET_TIMER, which will continue to reschedule the timeout. | |
2067 | * Eventually, either the device will return, or devloss_tmo will fire, | |
2068 | * and when the timeout then fires, it will be handled normally. | |
2069 | * If the rport is not blocked, normal error handling continues. | |
2070 | * | |
2071 | * Notes: | |
2072 | * This routine assumes no locks are held on entry. | |
eb44820c | 2073 | */ |
242f9dcb | 2074 | static enum blk_eh_timer_return |
c829c394 JS |
2075 | fc_timed_out(struct scsi_cmnd *scmd) |
2076 | { | |
2077 | struct fc_rport *rport = starget_to_rport(scsi_target(scmd->device)); | |
2078 | ||
2079 | if (rport->port_state == FC_PORTSTATE_BLOCKED) | |
242f9dcb | 2080 | return BLK_EH_RESET_TIMER; |
c829c394 | 2081 | |
242f9dcb | 2082 | return BLK_EH_NOT_HANDLED; |
c829c394 JS |
2083 | } |
2084 | ||
5c44cd2a | 2085 | /* |
bda23253 JS |
2086 | * Called by fc_user_scan to locate an rport on the shost that |
2087 | * matches the channel and target id, and invoke scsi_scan_target() | |
2088 | * on the rport. | |
5c44cd2a | 2089 | */ |
bda23253 JS |
2090 | static void |
2091 | fc_user_scan_tgt(struct Scsi_Host *shost, uint channel, uint id, uint lun) | |
5c44cd2a JSEC |
2092 | { |
2093 | struct fc_rport *rport; | |
bda23253 JS |
2094 | unsigned long flags; |
2095 | ||
2096 | spin_lock_irqsave(shost->host_lock, flags); | |
5c44cd2a | 2097 | |
e02f3f59 CH |
2098 | list_for_each_entry(rport, &fc_host_rports(shost), peers) { |
2099 | if (rport->scsi_target_id == -1) | |
2100 | continue; | |
5c44cd2a | 2101 | |
0d2fcd9f HR |
2102 | if (rport->port_state != FC_PORTSTATE_ONLINE) |
2103 | continue; | |
2104 | ||
bda23253 JS |
2105 | if ((channel == rport->channel) && |
2106 | (id == rport->scsi_target_id)) { | |
2107 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2108 | scsi_scan_target(&rport->dev, channel, id, lun, 1); | |
2109 | return; | |
e02f3f59 CH |
2110 | } |
2111 | } | |
2112 | ||
bda23253 JS |
2113 | spin_unlock_irqrestore(shost->host_lock, flags); |
2114 | } | |
2115 | ||
2116 | /* | |
2117 | * Called via sysfs scan routines. Necessary, as the FC transport | |
2118 | * wants to place all target objects below the rport object. So this | |
2119 | * routine must invoke the scsi_scan_target() routine with the rport | |
2120 | * object as the parent. | |
2121 | */ | |
2122 | static int | |
2123 | fc_user_scan(struct Scsi_Host *shost, uint channel, uint id, uint lun) | |
2124 | { | |
2125 | uint chlo, chhi; | |
2126 | uint tgtlo, tgthi; | |
2127 | ||
2128 | if (((channel != SCAN_WILD_CARD) && (channel > shost->max_channel)) || | |
2129 | ((id != SCAN_WILD_CARD) && (id >= shost->max_id)) || | |
2130 | ((lun != SCAN_WILD_CARD) && (lun > shost->max_lun))) | |
2131 | return -EINVAL; | |
2132 | ||
2133 | if (channel == SCAN_WILD_CARD) { | |
2134 | chlo = 0; | |
2135 | chhi = shost->max_channel + 1; | |
2136 | } else { | |
2137 | chlo = channel; | |
2138 | chhi = channel + 1; | |
2139 | } | |
2140 | ||
2141 | if (id == SCAN_WILD_CARD) { | |
2142 | tgtlo = 0; | |
2143 | tgthi = shost->max_id; | |
2144 | } else { | |
2145 | tgtlo = id; | |
2146 | tgthi = id + 1; | |
2147 | } | |
2148 | ||
2149 | for ( ; chlo < chhi; chlo++) | |
2150 | for ( ; tgtlo < tgthi; tgtlo++) | |
2151 | fc_user_scan_tgt(shost, chlo, tgtlo, lun); | |
2152 | ||
e02f3f59 | 2153 | return 0; |
5c44cd2a JSEC |
2154 | } |
2155 | ||
7525236d FT |
2156 | static int fc_tsk_mgmt_response(struct Scsi_Host *shost, u64 nexus, u64 tm_id, |
2157 | int result) | |
2158 | { | |
2159 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
2160 | return i->f->tsk_mgmt_response(shost, nexus, tm_id, result); | |
2161 | } | |
2162 | ||
2163 | static int fc_it_nexus_response(struct Scsi_Host *shost, u64 nexus, int result) | |
2164 | { | |
2165 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
2166 | return i->f->it_nexus_response(shost, nexus, result); | |
2167 | } | |
2168 | ||
1da177e4 LT |
2169 | struct scsi_transport_template * |
2170 | fc_attach_transport(struct fc_function_template *ft) | |
2171 | { | |
1da177e4 | 2172 | int count; |
24669f75 JS |
2173 | struct fc_internal *i = kzalloc(sizeof(struct fc_internal), |
2174 | GFP_KERNEL); | |
1da177e4 LT |
2175 | |
2176 | if (unlikely(!i)) | |
2177 | return NULL; | |
2178 | ||
1da177e4 LT |
2179 | i->t.target_attrs.ac.attrs = &i->starget_attrs[0]; |
2180 | i->t.target_attrs.ac.class = &fc_transport_class.class; | |
2181 | i->t.target_attrs.ac.match = fc_target_match; | |
2182 | i->t.target_size = sizeof(struct fc_starget_attrs); | |
2183 | transport_container_register(&i->t.target_attrs); | |
2184 | ||
2185 | i->t.host_attrs.ac.attrs = &i->host_attrs[0]; | |
2186 | i->t.host_attrs.ac.class = &fc_host_class.class; | |
2187 | i->t.host_attrs.ac.match = fc_host_match; | |
2188 | i->t.host_size = sizeof(struct fc_host_attrs); | |
2189 | if (ft->get_fc_host_stats) | |
2190 | i->t.host_attrs.statistics = &fc_statistics_group; | |
2191 | transport_container_register(&i->t.host_attrs); | |
2192 | ||
2193 | i->rport_attr_cont.ac.attrs = &i->rport_attrs[0]; | |
2194 | i->rport_attr_cont.ac.class = &fc_rport_class.class; | |
2195 | i->rport_attr_cont.ac.match = fc_rport_match; | |
2196 | transport_container_register(&i->rport_attr_cont); | |
2197 | ||
a53eb5e0 JS |
2198 | i->vport_attr_cont.ac.attrs = &i->vport_attrs[0]; |
2199 | i->vport_attr_cont.ac.class = &fc_vport_class.class; | |
2200 | i->vport_attr_cont.ac.match = fc_vport_match; | |
2201 | transport_container_register(&i->vport_attr_cont); | |
2202 | ||
1da177e4 LT |
2203 | i->f = ft; |
2204 | ||
2205 | /* Transport uses the shost workq for scsi scanning */ | |
2206 | i->t.create_work_queue = 1; | |
5c44cd2a | 2207 | |
c829c394 JS |
2208 | i->t.eh_timed_out = fc_timed_out; |
2209 | ||
e02f3f59 | 2210 | i->t.user_scan = fc_user_scan; |
9ef3e4a4 | 2211 | |
7525236d FT |
2212 | /* target-mode drivers' functions */ |
2213 | i->t.tsk_mgmt_response = fc_tsk_mgmt_response; | |
2214 | i->t.it_nexus_response = fc_it_nexus_response; | |
2215 | ||
1da177e4 LT |
2216 | /* |
2217 | * Setup SCSI Target Attributes. | |
2218 | */ | |
2219 | count = 0; | |
2220 | SETUP_STARGET_ATTRIBUTE_RD(node_name); | |
2221 | SETUP_STARGET_ATTRIBUTE_RD(port_name); | |
2222 | SETUP_STARGET_ATTRIBUTE_RD(port_id); | |
2223 | ||
2224 | BUG_ON(count > FC_STARGET_NUM_ATTRS); | |
2225 | ||
2226 | i->starget_attrs[count] = NULL; | |
2227 | ||
2228 | ||
2229 | /* | |
2230 | * Setup SCSI Host Attributes. | |
2231 | */ | |
2232 | count=0; | |
2233 | SETUP_HOST_ATTRIBUTE_RD(node_name); | |
2234 | SETUP_HOST_ATTRIBUTE_RD(port_name); | |
6b7281d0 | 2235 | SETUP_HOST_ATTRIBUTE_RD(permanent_port_name); |
1da177e4 LT |
2236 | SETUP_HOST_ATTRIBUTE_RD(supported_classes); |
2237 | SETUP_HOST_ATTRIBUTE_RD(supported_fc4s); | |
1da177e4 LT |
2238 | SETUP_HOST_ATTRIBUTE_RD(supported_speeds); |
2239 | SETUP_HOST_ATTRIBUTE_RD(maxframe_size); | |
a53eb5e0 JS |
2240 | if (ft->vport_create) { |
2241 | SETUP_HOST_ATTRIBUTE_RD_NS(max_npiv_vports); | |
2242 | SETUP_HOST_ATTRIBUTE_RD_NS(npiv_vports_inuse); | |
2243 | } | |
1da177e4 | 2244 | SETUP_HOST_ATTRIBUTE_RD(serial_number); |
bb8ef587 NP |
2245 | SETUP_HOST_ATTRIBUTE_RD(manufacturer); |
2246 | SETUP_HOST_ATTRIBUTE_RD(model); | |
2247 | SETUP_HOST_ATTRIBUTE_RD(model_description); | |
2248 | SETUP_HOST_ATTRIBUTE_RD(hardware_version); | |
2249 | SETUP_HOST_ATTRIBUTE_RD(driver_version); | |
2250 | SETUP_HOST_ATTRIBUTE_RD(firmware_version); | |
2251 | SETUP_HOST_ATTRIBUTE_RD(optionrom_version); | |
1da177e4 LT |
2252 | |
2253 | SETUP_HOST_ATTRIBUTE_RD(port_id); | |
2254 | SETUP_HOST_ATTRIBUTE_RD(port_type); | |
2255 | SETUP_HOST_ATTRIBUTE_RD(port_state); | |
2256 | SETUP_HOST_ATTRIBUTE_RD(active_fc4s); | |
2257 | SETUP_HOST_ATTRIBUTE_RD(speed); | |
2258 | SETUP_HOST_ATTRIBUTE_RD(fabric_name); | |
016131b8 | 2259 | SETUP_HOST_ATTRIBUTE_RD(symbolic_name); |
b8d08210 | 2260 | SETUP_HOST_ATTRIBUTE_RW(system_hostname); |
1da177e4 LT |
2261 | |
2262 | /* Transport-managed attributes */ | |
43ca910a | 2263 | SETUP_PRIVATE_HOST_ATTRIBUTE_RW(dev_loss_tmo); |
1da177e4 | 2264 | SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type); |
91ca7b01 AV |
2265 | if (ft->issue_fc_host_lip) |
2266 | SETUP_PRIVATE_HOST_ATTRIBUTE_RW(issue_lip); | |
a53eb5e0 JS |
2267 | if (ft->vport_create) |
2268 | SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_create); | |
2269 | if (ft->vport_delete) | |
2270 | SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_delete); | |
1da177e4 LT |
2271 | |
2272 | BUG_ON(count > FC_HOST_NUM_ATTRS); | |
2273 | ||
2274 | i->host_attrs[count] = NULL; | |
2275 | ||
2276 | /* | |
2277 | * Setup Remote Port Attributes. | |
2278 | */ | |
2279 | count=0; | |
2280 | SETUP_RPORT_ATTRIBUTE_RD(maxframe_size); | |
2281 | SETUP_RPORT_ATTRIBUTE_RD(supported_classes); | |
2282 | SETUP_RPORT_ATTRIBUTE_RW(dev_loss_tmo); | |
2283 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(node_name); | |
2284 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_name); | |
2285 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_id); | |
2286 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(roles); | |
2287 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_state); | |
2288 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(scsi_target_id); | |
fff9d40c | 2289 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(fast_io_fail_tmo); |
1da177e4 LT |
2290 | |
2291 | BUG_ON(count > FC_RPORT_NUM_ATTRS); | |
2292 | ||
2293 | i->rport_attrs[count] = NULL; | |
2294 | ||
a53eb5e0 JS |
2295 | /* |
2296 | * Setup Virtual Port Attributes. | |
2297 | */ | |
2298 | count=0; | |
2299 | SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_state); | |
2300 | SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_last_state); | |
2301 | SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(node_name); | |
2302 | SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(port_name); | |
2303 | SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(roles); | |
2304 | SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_type); | |
2305 | SETUP_VPORT_ATTRIBUTE_RW(symbolic_name); | |
2306 | SETUP_VPORT_ATTRIBUTE_WR(vport_delete); | |
2307 | SETUP_VPORT_ATTRIBUTE_WR(vport_disable); | |
2308 | ||
2309 | BUG_ON(count > FC_VPORT_NUM_ATTRS); | |
2310 | ||
2311 | i->vport_attrs[count] = NULL; | |
2312 | ||
1da177e4 LT |
2313 | return &i->t; |
2314 | } | |
2315 | EXPORT_SYMBOL(fc_attach_transport); | |
2316 | ||
2317 | void fc_release_transport(struct scsi_transport_template *t) | |
2318 | { | |
2319 | struct fc_internal *i = to_fc_internal(t); | |
2320 | ||
2321 | transport_container_unregister(&i->t.target_attrs); | |
2322 | transport_container_unregister(&i->t.host_attrs); | |
2323 | transport_container_unregister(&i->rport_attr_cont); | |
a53eb5e0 | 2324 | transport_container_unregister(&i->vport_attr_cont); |
1da177e4 LT |
2325 | |
2326 | kfree(i); | |
2327 | } | |
2328 | EXPORT_SYMBOL(fc_release_transport); | |
2329 | ||
aedf3497 JS |
2330 | /** |
2331 | * fc_queue_work - Queue work to the fc_host workqueue. | |
2332 | * @shost: Pointer to Scsi_Host bound to fc_host. | |
2333 | * @work: Work to queue for execution. | |
2334 | * | |
2335 | * Return value: | |
a0785edf JS |
2336 | * 1 - work queued for execution |
2337 | * 0 - work is already queued | |
2338 | * -EINVAL - work queue doesn't exist | |
eb44820c | 2339 | */ |
aedf3497 JS |
2340 | static int |
2341 | fc_queue_work(struct Scsi_Host *shost, struct work_struct *work) | |
2342 | { | |
2343 | if (unlikely(!fc_host_work_q(shost))) { | |
2344 | printk(KERN_ERR | |
2345 | "ERROR: FC host '%s' attempted to queue work, " | |
2346 | "when no workqueue created.\n", shost->hostt->name); | |
2347 | dump_stack(); | |
2348 | ||
2349 | return -EINVAL; | |
2350 | } | |
2351 | ||
2352 | return queue_work(fc_host_work_q(shost), work); | |
2353 | } | |
2354 | ||
2355 | /** | |
2356 | * fc_flush_work - Flush a fc_host's workqueue. | |
2357 | * @shost: Pointer to Scsi_Host bound to fc_host. | |
eb44820c | 2358 | */ |
aedf3497 JS |
2359 | static void |
2360 | fc_flush_work(struct Scsi_Host *shost) | |
2361 | { | |
2362 | if (!fc_host_work_q(shost)) { | |
2363 | printk(KERN_ERR | |
2364 | "ERROR: FC host '%s' attempted to flush work, " | |
2365 | "when no workqueue created.\n", shost->hostt->name); | |
2366 | dump_stack(); | |
2367 | return; | |
2368 | } | |
2369 | ||
2370 | flush_workqueue(fc_host_work_q(shost)); | |
2371 | } | |
2372 | ||
2373 | /** | |
2374 | * fc_queue_devloss_work - Schedule work for the fc_host devloss workqueue. | |
2375 | * @shost: Pointer to Scsi_Host bound to fc_host. | |
2376 | * @work: Work to queue for execution. | |
2377 | * @delay: jiffies to delay the work queuing | |
2378 | * | |
2379 | * Return value: | |
0f29b966 | 2380 | * 1 on success / 0 already queued / < 0 for error |
eb44820c | 2381 | */ |
aedf3497 | 2382 | static int |
c4028958 | 2383 | fc_queue_devloss_work(struct Scsi_Host *shost, struct delayed_work *work, |
aedf3497 JS |
2384 | unsigned long delay) |
2385 | { | |
2386 | if (unlikely(!fc_host_devloss_work_q(shost))) { | |
2387 | printk(KERN_ERR | |
2388 | "ERROR: FC host '%s' attempted to queue work, " | |
2389 | "when no workqueue created.\n", shost->hostt->name); | |
2390 | dump_stack(); | |
2391 | ||
2392 | return -EINVAL; | |
2393 | } | |
2394 | ||
2395 | return queue_delayed_work(fc_host_devloss_work_q(shost), work, delay); | |
2396 | } | |
2397 | ||
2398 | /** | |
2399 | * fc_flush_devloss - Flush a fc_host's devloss workqueue. | |
2400 | * @shost: Pointer to Scsi_Host bound to fc_host. | |
eb44820c | 2401 | */ |
aedf3497 JS |
2402 | static void |
2403 | fc_flush_devloss(struct Scsi_Host *shost) | |
2404 | { | |
2405 | if (!fc_host_devloss_work_q(shost)) { | |
2406 | printk(KERN_ERR | |
2407 | "ERROR: FC host '%s' attempted to flush work, " | |
2408 | "when no workqueue created.\n", shost->hostt->name); | |
2409 | dump_stack(); | |
2410 | return; | |
2411 | } | |
2412 | ||
2413 | flush_workqueue(fc_host_devloss_work_q(shost)); | |
2414 | } | |
2415 | ||
1da177e4 LT |
2416 | |
2417 | /** | |
eb44820c RL |
2418 | * fc_remove_host - called to terminate any fc_transport-related elements for a scsi host. |
2419 | * @shost: Which &Scsi_Host | |
1da177e4 | 2420 | * |
25985edc | 2421 | * This routine is expected to be called immediately preceding the |
1da177e4 LT |
2422 | * a driver's call to scsi_remove_host(). |
2423 | * | |
2424 | * WARNING: A driver utilizing the fc_transport, which fails to call | |
eb44820c | 2425 | * this routine prior to scsi_remove_host(), will leave dangling |
1da177e4 LT |
2426 | * objects in /sys/class/fc_remote_ports. Access to any of these |
2427 | * objects can result in a system crash !!! | |
2428 | * | |
2429 | * Notes: | |
2430 | * This routine assumes no locks are held on entry. | |
eb44820c | 2431 | */ |
1da177e4 LT |
2432 | void |
2433 | fc_remove_host(struct Scsi_Host *shost) | |
2434 | { | |
a53eb5e0 JS |
2435 | struct fc_vport *vport = NULL, *next_vport = NULL; |
2436 | struct fc_rport *rport = NULL, *next_rport = NULL; | |
aedf3497 JS |
2437 | struct workqueue_struct *work_q; |
2438 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); | |
a53eb5e0 | 2439 | unsigned long flags; |
a53eb5e0 JS |
2440 | |
2441 | spin_lock_irqsave(shost->host_lock, flags); | |
2442 | ||
2443 | /* Remove any vports */ | |
9ef3e4a4 JS |
2444 | list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers) |
2445 | fc_queue_work(shost, &vport->vport_delete_work); | |
1da177e4 LT |
2446 | |
2447 | /* Remove any remote ports */ | |
2448 | list_for_each_entry_safe(rport, next_rport, | |
aedf3497 JS |
2449 | &fc_host->rports, peers) { |
2450 | list_del(&rport->peers); | |
2451 | rport->port_state = FC_PORTSTATE_DELETED; | |
2452 | fc_queue_work(shost, &rport->rport_delete_work); | |
2453 | } | |
2454 | ||
1da177e4 | 2455 | list_for_each_entry_safe(rport, next_rport, |
aedf3497 JS |
2456 | &fc_host->rport_bindings, peers) { |
2457 | list_del(&rport->peers); | |
2458 | rport->port_state = FC_PORTSTATE_DELETED; | |
2459 | fc_queue_work(shost, &rport->rport_delete_work); | |
2460 | } | |
2461 | ||
a53eb5e0 JS |
2462 | spin_unlock_irqrestore(shost->host_lock, flags); |
2463 | ||
aedf3497 JS |
2464 | /* flush all scan work items */ |
2465 | scsi_flush_work(shost); | |
2466 | ||
2467 | /* flush all stgt delete, and rport delete work items, then kill it */ | |
2468 | if (fc_host->work_q) { | |
2469 | work_q = fc_host->work_q; | |
2470 | fc_host->work_q = NULL; | |
2471 | destroy_workqueue(work_q); | |
2472 | } | |
2473 | ||
2474 | /* flush all devloss work items, then kill it */ | |
2475 | if (fc_host->devloss_work_q) { | |
2476 | work_q = fc_host->devloss_work_q; | |
2477 | fc_host->devloss_work_q = NULL; | |
2478 | destroy_workqueue(work_q); | |
2479 | } | |
1da177e4 LT |
2480 | } |
2481 | EXPORT_SYMBOL(fc_remove_host); | |
2482 | ||
fff9d40c MC |
2483 | static void fc_terminate_rport_io(struct fc_rport *rport) |
2484 | { | |
2485 | struct Scsi_Host *shost = rport_to_shost(rport); | |
2486 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
2487 | ||
2488 | /* Involve the LLDD if possible to terminate all io on the rport. */ | |
2489 | if (i->f->terminate_rport_io) | |
2490 | i->f->terminate_rport_io(rport); | |
2491 | ||
2492 | /* | |
5d9fb5cc | 2493 | * Must unblock to flush queued IO. scsi-ml will fail incoming reqs. |
fff9d40c | 2494 | */ |
5d9fb5cc | 2495 | scsi_target_unblock(&rport->dev, SDEV_TRANSPORT_OFFLINE); |
fff9d40c | 2496 | } |
aedf3497 JS |
2497 | |
2498 | /** | |
25985edc | 2499 | * fc_starget_delete - called to delete the scsi descendants of an rport |
c4028958 | 2500 | * @work: remote port to be operated on. |
eb44820c RL |
2501 | * |
2502 | * Deletes target and all sdevs. | |
2503 | */ | |
19a7b4ae | 2504 | static void |
c4028958 | 2505 | fc_starget_delete(struct work_struct *work) |
19a7b4ae | 2506 | { |
c4028958 DH |
2507 | struct fc_rport *rport = |
2508 | container_of(work, struct fc_rport, stgt_delete_work); | |
19a7b4ae | 2509 | |
fff9d40c | 2510 | fc_terminate_rport_io(rport); |
19a7b4ae JSEC |
2511 | scsi_remove_target(&rport->dev); |
2512 | } | |
2513 | ||
aedf3497 JS |
2514 | |
2515 | /** | |
2516 | * fc_rport_final_delete - finish rport termination and delete it. | |
c4028958 | 2517 | * @work: remote port to be deleted. |
eb44820c | 2518 | */ |
aedf3497 | 2519 | static void |
c4028958 | 2520 | fc_rport_final_delete(struct work_struct *work) |
aedf3497 | 2521 | { |
c4028958 DH |
2522 | struct fc_rport *rport = |
2523 | container_of(work, struct fc_rport, rport_delete_work); | |
aedf3497 JS |
2524 | struct device *dev = &rport->dev; |
2525 | struct Scsi_Host *shost = rport_to_shost(rport); | |
0f29b966 | 2526 | struct fc_internal *i = to_fc_internal(shost->transportt); |
92740b24 | 2527 | unsigned long flags; |
8798a694 | 2528 | int do_callback = 0; |
aedf3497 | 2529 | |
112f661d NNS |
2530 | fc_terminate_rport_io(rport); |
2531 | ||
aedf3497 | 2532 | /* |
9ef3e4a4 | 2533 | * if a scan is pending, flush the SCSI Host work_q so that |
aedf3497 JS |
2534 | * that we can reclaim the rport scan work element. |
2535 | */ | |
2536 | if (rport->flags & FC_RPORT_SCAN_PENDING) | |
2537 | scsi_flush_work(shost); | |
2538 | ||
92740b24 JS |
2539 | /* |
2540 | * Cancel any outstanding timers. These should really exist | |
2541 | * only when rmmod'ing the LLDD and we're asking for | |
2542 | * immediate termination of the rports | |
2543 | */ | |
2544 | spin_lock_irqsave(shost->host_lock, flags); | |
2545 | if (rport->flags & FC_RPORT_DEVLOSS_PENDING) { | |
2546 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2547 | if (!cancel_delayed_work(&rport->fail_io_work)) | |
2548 | fc_flush_devloss(shost); | |
2549 | if (!cancel_delayed_work(&rport->dev_loss_work)) | |
2550 | fc_flush_devloss(shost); | |
2551 | spin_lock_irqsave(shost->host_lock, flags); | |
2552 | rport->flags &= ~FC_RPORT_DEVLOSS_PENDING; | |
2553 | } | |
2554 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2555 | ||
0f29b966 JS |
2556 | /* Delete SCSI target and sdevs */ |
2557 | if (rport->scsi_target_id != -1) | |
c4028958 | 2558 | fc_starget_delete(&rport->stgt_delete_work); |
92740b24 JS |
2559 | |
2560 | /* | |
2561 | * Notify the driver that the rport is now dead. The LLDD will | |
2562 | * also guarantee that any communication to the rport is terminated | |
4be98c0c JS |
2563 | * |
2564 | * Avoid this call if we already called it when we preserved the | |
2565 | * rport for the binding. | |
92740b24 | 2566 | */ |
8798a694 | 2567 | spin_lock_irqsave(shost->host_lock, flags); |
4be98c0c | 2568 | if (!(rport->flags & FC_RPORT_DEVLOSS_CALLBK_DONE) && |
8798a694 MR |
2569 | (i->f->dev_loss_tmo_callbk)) { |
2570 | rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE; | |
2571 | do_callback = 1; | |
2572 | } | |
2573 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2574 | ||
2575 | if (do_callback) | |
0f29b966 | 2576 | i->f->dev_loss_tmo_callbk(rport); |
0f29b966 | 2577 | |
9e4f5e29 JS |
2578 | fc_bsg_remove(rport->rqst_q); |
2579 | ||
aedf3497 JS |
2580 | transport_remove_device(dev); |
2581 | device_del(dev); | |
2582 | transport_destroy_device(dev); | |
3bdad7bd JS |
2583 | put_device(&shost->shost_gendev); /* for fc_host->rport list */ |
2584 | put_device(dev); /* for self-reference */ | |
aedf3497 JS |
2585 | } |
2586 | ||
2587 | ||
1da177e4 LT |
2588 | /** |
2589 | * fc_rport_create - allocates and creates a remote FC port. | |
2590 | * @shost: scsi host the remote port is connected to. | |
2591 | * @channel: Channel on shost port connected to. | |
2592 | * @ids: The world wide names, fc address, and FC4 port | |
2593 | * roles for the remote port. | |
2594 | * | |
2595 | * Allocates and creates the remoter port structure, including the | |
2596 | * class and sysfs creation. | |
2597 | * | |
2598 | * Notes: | |
2599 | * This routine assumes no locks are held on entry. | |
eb44820c | 2600 | */ |
44818efb | 2601 | static struct fc_rport * |
1da177e4 LT |
2602 | fc_rport_create(struct Scsi_Host *shost, int channel, |
2603 | struct fc_rport_identifiers *ids) | |
2604 | { | |
aedf3497 | 2605 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
1da177e4 LT |
2606 | struct fc_internal *fci = to_fc_internal(shost->transportt); |
2607 | struct fc_rport *rport; | |
2608 | struct device *dev; | |
2609 | unsigned long flags; | |
2610 | int error; | |
2611 | size_t size; | |
2612 | ||
2613 | size = (sizeof(struct fc_rport) + fci->f->dd_fcrport_size); | |
24669f75 | 2614 | rport = kzalloc(size, GFP_KERNEL); |
1da177e4 | 2615 | if (unlikely(!rport)) { |
cadbd4a5 | 2616 | printk(KERN_ERR "%s: allocation failure\n", __func__); |
1da177e4 LT |
2617 | return NULL; |
2618 | } | |
1da177e4 LT |
2619 | |
2620 | rport->maxframe_size = -1; | |
2621 | rport->supported_classes = FC_COS_UNSPECIFIED; | |
43ca910a | 2622 | rport->dev_loss_tmo = fc_host->dev_loss_tmo; |
1da177e4 LT |
2623 | memcpy(&rport->node_name, &ids->node_name, sizeof(rport->node_name)); |
2624 | memcpy(&rport->port_name, &ids->port_name, sizeof(rport->port_name)); | |
2625 | rport->port_id = ids->port_id; | |
2626 | rport->roles = ids->roles; | |
2627 | rport->port_state = FC_PORTSTATE_ONLINE; | |
2628 | if (fci->f->dd_fcrport_size) | |
2629 | rport->dd_data = &rport[1]; | |
2630 | rport->channel = channel; | |
0f29b966 | 2631 | rport->fast_io_fail_tmo = -1; |
1da177e4 | 2632 | |
c4028958 DH |
2633 | INIT_DELAYED_WORK(&rport->dev_loss_work, fc_timeout_deleted_rport); |
2634 | INIT_DELAYED_WORK(&rport->fail_io_work, fc_timeout_fail_rport_io); | |
2635 | INIT_WORK(&rport->scan_work, fc_scsi_scan_rport); | |
2636 | INIT_WORK(&rport->stgt_delete_work, fc_starget_delete); | |
2637 | INIT_WORK(&rport->rport_delete_work, fc_rport_final_delete); | |
1da177e4 LT |
2638 | |
2639 | spin_lock_irqsave(shost->host_lock, flags); | |
2640 | ||
2641 | rport->number = fc_host->next_rport_number++; | |
a53eb5e0 | 2642 | if (rport->roles & FC_PORT_ROLE_FCP_TARGET) |
1da177e4 LT |
2643 | rport->scsi_target_id = fc_host->next_target_id++; |
2644 | else | |
2645 | rport->scsi_target_id = -1; | |
aedf3497 | 2646 | list_add_tail(&rport->peers, &fc_host->rports); |
3bdad7bd | 2647 | get_device(&shost->shost_gendev); /* for fc_host->rport list */ |
1da177e4 LT |
2648 | |
2649 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2650 | ||
2651 | dev = &rport->dev; | |
3bdad7bd JS |
2652 | device_initialize(dev); /* takes self reference */ |
2653 | dev->parent = get_device(&shost->shost_gendev); /* parent reference */ | |
1da177e4 | 2654 | dev->release = fc_rport_dev_release; |
71610f55 KS |
2655 | dev_set_name(dev, "rport-%d:%d-%d", |
2656 | shost->host_no, channel, rport->number); | |
1da177e4 LT |
2657 | transport_setup_device(dev); |
2658 | ||
2659 | error = device_add(dev); | |
2660 | if (error) { | |
2661 | printk(KERN_ERR "FC Remote Port device_add failed\n"); | |
2662 | goto delete_rport; | |
2663 | } | |
2664 | transport_add_device(dev); | |
2665 | transport_configure_device(dev); | |
2666 | ||
9e4f5e29 JS |
2667 | fc_bsg_rportadd(shost, rport); |
2668 | /* ignore any bsg add error - we just can't do sgio */ | |
2669 | ||
a53eb5e0 | 2670 | if (rport->roles & FC_PORT_ROLE_FCP_TARGET) { |
1da177e4 | 2671 | /* initiate a scan of the target */ |
aedf3497 | 2672 | rport->flags |= FC_RPORT_SCAN_PENDING; |
1da177e4 | 2673 | scsi_queue_work(shost, &rport->scan_work); |
aedf3497 | 2674 | } |
1da177e4 LT |
2675 | |
2676 | return rport; | |
2677 | ||
2678 | delete_rport: | |
2679 | transport_destroy_device(dev); | |
1da177e4 LT |
2680 | spin_lock_irqsave(shost->host_lock, flags); |
2681 | list_del(&rport->peers); | |
3bdad7bd | 2682 | put_device(&shost->shost_gendev); /* for fc_host->rport list */ |
1da177e4 LT |
2683 | spin_unlock_irqrestore(shost->host_lock, flags); |
2684 | put_device(dev->parent); | |
2685 | kfree(rport); | |
2686 | return NULL; | |
2687 | } | |
2688 | ||
2689 | /** | |
eb44820c | 2690 | * fc_remote_port_add - notify fc transport of the existence of a remote FC port. |
1da177e4 LT |
2691 | * @shost: scsi host the remote port is connected to. |
2692 | * @channel: Channel on shost port connected to. | |
2693 | * @ids: The world wide names, fc address, and FC4 port | |
2694 | * roles for the remote port. | |
2695 | * | |
2696 | * The LLDD calls this routine to notify the transport of the existence | |
2697 | * of a remote port. The LLDD provides the unique identifiers (wwpn,wwn) | |
2698 | * of the port, it's FC address (port_id), and the FC4 roles that are | |
2699 | * active for the port. | |
2700 | * | |
2701 | * For ports that are FCP targets (aka scsi targets), the FC transport | |
2702 | * maintains consistent target id bindings on behalf of the LLDD. | |
2703 | * A consistent target id binding is an assignment of a target id to | |
2704 | * a remote port identifier, which persists while the scsi host is | |
2705 | * attached. The remote port can disappear, then later reappear, and | |
2706 | * it's target id assignment remains the same. This allows for shifts | |
2707 | * in FC addressing (if binding by wwpn or wwnn) with no apparent | |
2708 | * changes to the scsi subsystem which is based on scsi host number and | |
2709 | * target id values. Bindings are only valid during the attachment of | |
2710 | * the scsi host. If the host detaches, then later re-attaches, target | |
2711 | * id bindings may change. | |
2712 | * | |
2713 | * This routine is responsible for returning a remote port structure. | |
2714 | * The routine will search the list of remote ports it maintains | |
2715 | * internally on behalf of consistent target id mappings. If found, the | |
2716 | * remote port structure will be reused. Otherwise, a new remote port | |
2717 | * structure will be allocated. | |
2718 | * | |
2719 | * Whenever a remote port is allocated, a new fc_remote_port class | |
2720 | * device is created. | |
2721 | * | |
2722 | * Should not be called from interrupt context. | |
2723 | * | |
2724 | * Notes: | |
2725 | * This routine assumes no locks are held on entry. | |
eb44820c | 2726 | */ |
1da177e4 LT |
2727 | struct fc_rport * |
2728 | fc_remote_port_add(struct Scsi_Host *shost, int channel, | |
2729 | struct fc_rport_identifiers *ids) | |
2730 | { | |
19a7b4ae | 2731 | struct fc_internal *fci = to_fc_internal(shost->transportt); |
aedf3497 | 2732 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
1da177e4 LT |
2733 | struct fc_rport *rport; |
2734 | unsigned long flags; | |
2735 | int match = 0; | |
2736 | ||
aedf3497 JS |
2737 | /* ensure any stgt delete functions are done */ |
2738 | fc_flush_work(shost); | |
2739 | ||
19a7b4ae JSEC |
2740 | /* |
2741 | * Search the list of "active" rports, for an rport that has been | |
2742 | * deleted, but we've held off the real delete while the target | |
2743 | * is in a "blocked" state. | |
2744 | */ | |
2745 | spin_lock_irqsave(shost->host_lock, flags); | |
2746 | ||
aedf3497 | 2747 | list_for_each_entry(rport, &fc_host->rports, peers) { |
19a7b4ae JSEC |
2748 | |
2749 | if ((rport->port_state == FC_PORTSTATE_BLOCKED) && | |
2750 | (rport->channel == channel)) { | |
2751 | ||
aedf3497 | 2752 | switch (fc_host->tgtid_bind_type) { |
19a7b4ae JSEC |
2753 | case FC_TGTID_BIND_BY_WWPN: |
2754 | case FC_TGTID_BIND_NONE: | |
2755 | if (rport->port_name == ids->port_name) | |
2756 | match = 1; | |
2757 | break; | |
2758 | case FC_TGTID_BIND_BY_WWNN: | |
2759 | if (rport->node_name == ids->node_name) | |
2760 | match = 1; | |
2761 | break; | |
2762 | case FC_TGTID_BIND_BY_ID: | |
2763 | if (rport->port_id == ids->port_id) | |
2764 | match = 1; | |
2765 | break; | |
2766 | } | |
2767 | ||
2768 | if (match) { | |
19a7b4ae JSEC |
2769 | |
2770 | memcpy(&rport->node_name, &ids->node_name, | |
2771 | sizeof(rport->node_name)); | |
2772 | memcpy(&rport->port_name, &ids->port_name, | |
2773 | sizeof(rport->port_name)); | |
2774 | rport->port_id = ids->port_id; | |
2775 | ||
2776 | rport->port_state = FC_PORTSTATE_ONLINE; | |
2777 | rport->roles = ids->roles; | |
2778 | ||
2779 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2780 | ||
2781 | if (fci->f->dd_fcrport_size) | |
2782 | memset(rport->dd_data, 0, | |
2783 | fci->f->dd_fcrport_size); | |
2784 | ||
2785 | /* | |
92740b24 JS |
2786 | * If we were not a target, cancel the |
2787 | * io terminate and rport timers, and | |
2788 | * we're done. | |
2789 | * | |
2790 | * If we were a target, but our new role | |
2791 | * doesn't indicate a target, leave the | |
2792 | * timers running expecting the role to | |
2793 | * change as the target fully logs in. If | |
2794 | * it doesn't, the target will be torn down. | |
2795 | * | |
2796 | * If we were a target, and our role shows | |
2797 | * we're still a target, cancel the timers | |
2798 | * and kick off a scan. | |
19a7b4ae | 2799 | */ |
19a7b4ae | 2800 | |
92740b24 JS |
2801 | /* was a target, not in roles */ |
2802 | if ((rport->scsi_target_id != -1) && | |
a53eb5e0 | 2803 | (!(ids->roles & FC_PORT_ROLE_FCP_TARGET))) |
92740b24 | 2804 | return rport; |
19a7b4ae JSEC |
2805 | |
2806 | /* | |
92740b24 JS |
2807 | * Stop the fail io and dev_loss timers. |
2808 | * If they flush, the port_state will | |
2809 | * be checked and will NOOP the function. | |
19a7b4ae | 2810 | */ |
0f29b966 JS |
2811 | if (!cancel_delayed_work(&rport->fail_io_work)) |
2812 | fc_flush_devloss(shost); | |
92740b24 | 2813 | if (!cancel_delayed_work(&rport->dev_loss_work)) |
aedf3497 JS |
2814 | fc_flush_devloss(shost); |
2815 | ||
2816 | spin_lock_irqsave(shost->host_lock, flags); | |
2817 | ||
fff9d40c | 2818 | rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT | |
4be98c0c JS |
2819 | FC_RPORT_DEVLOSS_PENDING | |
2820 | FC_RPORT_DEVLOSS_CALLBK_DONE); | |
19a7b4ae | 2821 | |
8fb2ef89 MC |
2822 | spin_unlock_irqrestore(shost->host_lock, flags); |
2823 | ||
92740b24 JS |
2824 | /* if target, initiate a scan */ |
2825 | if (rport->scsi_target_id != -1) { | |
5d9fb5cc MC |
2826 | scsi_target_unblock(&rport->dev, |
2827 | SDEV_RUNNING); | |
8fb2ef89 MC |
2828 | spin_lock_irqsave(shost->host_lock, |
2829 | flags); | |
92740b24 JS |
2830 | rport->flags |= FC_RPORT_SCAN_PENDING; |
2831 | scsi_queue_work(shost, | |
2832 | &rport->scan_work); | |
2833 | spin_unlock_irqrestore(shost->host_lock, | |
2834 | flags); | |
8fb2ef89 | 2835 | } |
a0785edf | 2836 | |
9e4f5e29 JS |
2837 | fc_bsg_goose_queue(rport); |
2838 | ||
19a7b4ae JSEC |
2839 | return rport; |
2840 | } | |
2841 | } | |
2842 | } | |
2843 | ||
92740b24 JS |
2844 | /* |
2845 | * Search the bindings array | |
2846 | * Note: if never a FCP target, you won't be on this list | |
2847 | */ | |
aedf3497 | 2848 | if (fc_host->tgtid_bind_type != FC_TGTID_BIND_NONE) { |
1da177e4 LT |
2849 | |
2850 | /* search for a matching consistent binding */ | |
2851 | ||
aedf3497 | 2852 | list_for_each_entry(rport, &fc_host->rport_bindings, |
1da177e4 LT |
2853 | peers) { |
2854 | if (rport->channel != channel) | |
2855 | continue; | |
2856 | ||
aedf3497 | 2857 | switch (fc_host->tgtid_bind_type) { |
1da177e4 LT |
2858 | case FC_TGTID_BIND_BY_WWPN: |
2859 | if (rport->port_name == ids->port_name) | |
2860 | match = 1; | |
2861 | break; | |
2862 | case FC_TGTID_BIND_BY_WWNN: | |
2863 | if (rport->node_name == ids->node_name) | |
2864 | match = 1; | |
2865 | break; | |
2866 | case FC_TGTID_BIND_BY_ID: | |
2867 | if (rport->port_id == ids->port_id) | |
2868 | match = 1; | |
2869 | break; | |
2870 | case FC_TGTID_BIND_NONE: /* to keep compiler happy */ | |
2871 | break; | |
2872 | } | |
2873 | ||
2874 | if (match) { | |
aedf3497 | 2875 | list_move_tail(&rport->peers, &fc_host->rports); |
1da177e4 LT |
2876 | break; |
2877 | } | |
2878 | } | |
2879 | ||
1da177e4 LT |
2880 | if (match) { |
2881 | memcpy(&rport->node_name, &ids->node_name, | |
2882 | sizeof(rport->node_name)); | |
2883 | memcpy(&rport->port_name, &ids->port_name, | |
2884 | sizeof(rport->port_name)); | |
2885 | rport->port_id = ids->port_id; | |
2886 | rport->roles = ids->roles; | |
2887 | rport->port_state = FC_PORTSTATE_ONLINE; | |
fff9d40c | 2888 | rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT; |
1da177e4 | 2889 | |
19a7b4ae JSEC |
2890 | if (fci->f->dd_fcrport_size) |
2891 | memset(rport->dd_data, 0, | |
2892 | fci->f->dd_fcrport_size); | |
8fb2ef89 MC |
2893 | spin_unlock_irqrestore(shost->host_lock, flags); |
2894 | ||
2895 | if (ids->roles & FC_PORT_ROLE_FCP_TARGET) { | |
5d9fb5cc | 2896 | scsi_target_unblock(&rport->dev, SDEV_RUNNING); |
19a7b4ae | 2897 | |
1da177e4 | 2898 | /* initiate a scan of the target */ |
8fb2ef89 | 2899 | spin_lock_irqsave(shost->host_lock, flags); |
aedf3497 | 2900 | rport->flags |= FC_RPORT_SCAN_PENDING; |
1da177e4 | 2901 | scsi_queue_work(shost, &rport->scan_work); |
a0785edf | 2902 | spin_unlock_irqrestore(shost->host_lock, flags); |
8fb2ef89 | 2903 | } |
1da177e4 LT |
2904 | return rport; |
2905 | } | |
2906 | } | |
2907 | ||
19a7b4ae JSEC |
2908 | spin_unlock_irqrestore(shost->host_lock, flags); |
2909 | ||
1da177e4 LT |
2910 | /* No consistent binding found - create new remote port entry */ |
2911 | rport = fc_rport_create(shost, channel, ids); | |
2912 | ||
2913 | return rport; | |
2914 | } | |
2915 | EXPORT_SYMBOL(fc_remote_port_add); | |
2916 | ||
1da177e4 LT |
2917 | |
2918 | /** | |
eb44820c | 2919 | * fc_remote_port_delete - notifies the fc transport that a remote port is no longer in existence. |
1da177e4 LT |
2920 | * @rport: The remote port that no longer exists |
2921 | * | |
2922 | * The LLDD calls this routine to notify the transport that a remote | |
2923 | * port is no longer part of the topology. Note: Although a port | |
2924 | * may no longer be part of the topology, it may persist in the remote | |
19a7b4ae | 2925 | * ports displayed by the fc_host. We do this under 2 conditions: |
eb44820c | 2926 | * 1) If the port was a scsi target, we delay its deletion by "blocking" it. |
19a7b4ae JSEC |
2927 | * This allows the port to temporarily disappear, then reappear without |
2928 | * disrupting the SCSI device tree attached to it. During the "blocked" | |
2929 | * period the port will still exist. | |
eb44820c | 2930 | * 2) If the port was a scsi target and disappears for longer than we |
19a7b4ae JSEC |
2931 | * expect, we'll delete the port and the tear down the SCSI device tree |
2932 | * attached to it. However, we want to semi-persist the target id assigned | |
2933 | * to that port if it eventually does exist. The port structure will | |
2934 | * remain (although with minimal information) so that the target id | |
2935 | * bindings remails. | |
1da177e4 LT |
2936 | * |
2937 | * If the remote port is not an FCP Target, it will be fully torn down | |
2938 | * and deallocated, including the fc_remote_port class device. | |
2939 | * | |
19a7b4ae JSEC |
2940 | * If the remote port is an FCP Target, the port will be placed in a |
2941 | * temporary blocked state. From the LLDD's perspective, the rport no | |
2942 | * longer exists. From the SCSI midlayer's perspective, the SCSI target | |
2943 | * exists, but all sdevs on it are blocked from further I/O. The following | |
eb44820c RL |
2944 | * is then expected. |
2945 | * | |
19a7b4ae JSEC |
2946 | * If the remote port does not return (signaled by a LLDD call to |
2947 | * fc_remote_port_add()) within the dev_loss_tmo timeout, then the | |
2948 | * scsi target is removed - killing all outstanding i/o and removing the | |
2949 | * scsi devices attached ot it. The port structure will be marked Not | |
2950 | * Present and be partially cleared, leaving only enough information to | |
2951 | * recognize the remote port relative to the scsi target id binding if | |
2952 | * it later appears. The port will remain as long as there is a valid | |
2953 | * binding (e.g. until the user changes the binding type or unloads the | |
2954 | * scsi host with the binding). | |
1da177e4 | 2955 | * |
19a7b4ae JSEC |
2956 | * If the remote port returns within the dev_loss_tmo value (and matches |
2957 | * according to the target id binding type), the port structure will be | |
2958 | * reused. If it is no longer a SCSI target, the target will be torn | |
2959 | * down. If it continues to be a SCSI target, then the target will be | |
2960 | * unblocked (allowing i/o to be resumed), and a scan will be activated | |
2961 | * to ensure that all luns are detected. | |
2962 | * | |
2963 | * Called from normal process context only - cannot be called from interrupt. | |
1da177e4 LT |
2964 | * |
2965 | * Notes: | |
2966 | * This routine assumes no locks are held on entry. | |
eb44820c | 2967 | */ |
1da177e4 LT |
2968 | void |
2969 | fc_remote_port_delete(struct fc_rport *rport) | |
2970 | { | |
aedf3497 | 2971 | struct Scsi_Host *shost = rport_to_shost(rport); |
36dd288f | 2972 | unsigned long timeout = rport->dev_loss_tmo; |
aedf3497 JS |
2973 | unsigned long flags; |
2974 | ||
2975 | /* | |
2976 | * No need to flush the fc_host work_q's, as all adds are synchronous. | |
2977 | * | |
2978 | * We do need to reclaim the rport scan work element, so eventually | |
2979 | * (in fc_rport_final_delete()) we'll flush the scsi host work_q if | |
2980 | * there's still a scan pending. | |
2981 | */ | |
2982 | ||
2983 | spin_lock_irqsave(shost->host_lock, flags); | |
1da177e4 | 2984 | |
92740b24 | 2985 | if (rport->port_state != FC_PORTSTATE_ONLINE) { |
aedf3497 | 2986 | spin_unlock_irqrestore(shost->host_lock, flags); |
1da177e4 LT |
2987 | return; |
2988 | } | |
2989 | ||
92740b24 JS |
2990 | /* |
2991 | * In the past, we if this was not an FCP-Target, we would | |
2992 | * unconditionally just jump to deleting the rport. | |
2993 | * However, rports can be used as node containers by the LLDD, | |
2994 | * and its not appropriate to just terminate the rport at the | |
2995 | * first sign of a loss in connectivity. The LLDD may want to | |
2996 | * send ELS traffic to re-validate the login. If the rport is | |
2997 | * immediately deleted, it makes it inappropriate for a node | |
2998 | * container. | |
2999 | * So... we now unconditionally wait dev_loss_tmo before | |
3000 | * destroying an rport. | |
3001 | */ | |
3002 | ||
aedf3497 JS |
3003 | rport->port_state = FC_PORTSTATE_BLOCKED; |
3004 | ||
3005 | rport->flags |= FC_RPORT_DEVLOSS_PENDING; | |
3006 | ||
3007 | spin_unlock_irqrestore(shost->host_lock, flags); | |
3008 | ||
7525236d FT |
3009 | if (rport->roles & FC_PORT_ROLE_FCP_INITIATOR && |
3010 | shost->active_mode & MODE_TARGET) | |
3011 | fc_tgt_it_nexus_destroy(shost, (unsigned long)rport); | |
3012 | ||
19a7b4ae | 3013 | scsi_target_block(&rport->dev); |
1da177e4 | 3014 | |
0f29b966 JS |
3015 | /* see if we need to kill io faster than waiting for device loss */ |
3016 | if ((rport->fast_io_fail_tmo != -1) && | |
fff9d40c | 3017 | (rport->fast_io_fail_tmo < timeout)) |
0f29b966 JS |
3018 | fc_queue_devloss_work(shost, &rport->fail_io_work, |
3019 | rport->fast_io_fail_tmo * HZ); | |
3020 | ||
19a7b4ae | 3021 | /* cap the length the devices can be blocked until they are deleted */ |
aedf3497 | 3022 | fc_queue_devloss_work(shost, &rport->dev_loss_work, timeout * HZ); |
1da177e4 LT |
3023 | } |
3024 | EXPORT_SYMBOL(fc_remote_port_delete); | |
3025 | ||
3026 | /** | |
eb44820c | 3027 | * fc_remote_port_rolechg - notifies the fc transport that the roles on a remote may have changed. |
1da177e4 | 3028 | * @rport: The remote port that changed. |
eb44820c | 3029 | * @roles: New roles for this port. |
1da177e4 | 3030 | * |
eb44820c RL |
3031 | * Description: The LLDD calls this routine to notify the transport that the |
3032 | * roles on a remote port may have changed. The largest effect of this is | |
1da177e4 LT |
3033 | * if a port now becomes a FCP Target, it must be allocated a |
3034 | * scsi target id. If the port is no longer a FCP target, any | |
3035 | * scsi target id value assigned to it will persist in case the | |
3036 | * role changes back to include FCP Target. No changes in the scsi | |
3037 | * midlayer will be invoked if the role changes (in the expectation | |
3038 | * that the role will be resumed. If it doesn't normal error processing | |
3039 | * will take place). | |
3040 | * | |
3041 | * Should not be called from interrupt context. | |
3042 | * | |
3043 | * Notes: | |
3044 | * This routine assumes no locks are held on entry. | |
eb44820c | 3045 | */ |
1da177e4 LT |
3046 | void |
3047 | fc_remote_port_rolechg(struct fc_rport *rport, u32 roles) | |
3048 | { | |
3049 | struct Scsi_Host *shost = rport_to_shost(rport); | |
aedf3497 | 3050 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
1da177e4 LT |
3051 | unsigned long flags; |
3052 | int create = 0; | |
7525236d | 3053 | int ret; |
1da177e4 | 3054 | |
1da177e4 | 3055 | spin_lock_irqsave(shost->host_lock, flags); |
a53eb5e0 | 3056 | if (roles & FC_PORT_ROLE_FCP_TARGET) { |
19a7b4ae JSEC |
3057 | if (rport->scsi_target_id == -1) { |
3058 | rport->scsi_target_id = fc_host->next_target_id++; | |
3059 | create = 1; | |
a53eb5e0 | 3060 | } else if (!(rport->roles & FC_PORT_ROLE_FCP_TARGET)) |
19a7b4ae | 3061 | create = 1; |
7525236d FT |
3062 | } else if (shost->active_mode & MODE_TARGET) { |
3063 | ret = fc_tgt_it_nexus_create(shost, (unsigned long)rport, | |
3064 | (char *)&rport->node_name); | |
3065 | if (ret) | |
3066 | printk(KERN_ERR "FC Remore Port tgt nexus failed %d\n", | |
3067 | ret); | |
1da177e4 | 3068 | } |
1da177e4 | 3069 | |
19a7b4ae JSEC |
3070 | rport->roles = roles; |
3071 | ||
aedf3497 JS |
3072 | spin_unlock_irqrestore(shost->host_lock, flags); |
3073 | ||
19a7b4ae JSEC |
3074 | if (create) { |
3075 | /* | |
3076 | * There may have been a delete timer running on the | |
3077 | * port. Ensure that it is cancelled as we now know | |
3078 | * the port is an FCP Target. | |
3079 | * Note: we know the rport is exists and in an online | |
3080 | * state as the LLDD would not have had an rport | |
3081 | * reference to pass us. | |
3082 | * | |
3083 | * Take no action on the del_timer failure as the state | |
3084 | * machine state change will validate the | |
3085 | * transaction. | |
3086 | */ | |
0f29b966 JS |
3087 | if (!cancel_delayed_work(&rport->fail_io_work)) |
3088 | fc_flush_devloss(shost); | |
19a7b4ae | 3089 | if (!cancel_delayed_work(&rport->dev_loss_work)) |
aedf3497 JS |
3090 | fc_flush_devloss(shost); |
3091 | ||
3092 | spin_lock_irqsave(shost->host_lock, flags); | |
fff9d40c | 3093 | rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT | |
0eecee41 JS |
3094 | FC_RPORT_DEVLOSS_PENDING | |
3095 | FC_RPORT_DEVLOSS_CALLBK_DONE); | |
aedf3497 JS |
3096 | spin_unlock_irqrestore(shost->host_lock, flags); |
3097 | ||
3098 | /* ensure any stgt delete functions are done */ | |
3099 | fc_flush_work(shost); | |
19a7b4ae | 3100 | |
5d9fb5cc | 3101 | scsi_target_unblock(&rport->dev, SDEV_RUNNING); |
1da177e4 | 3102 | /* initiate a scan of the target */ |
aedf3497 JS |
3103 | spin_lock_irqsave(shost->host_lock, flags); |
3104 | rport->flags |= FC_RPORT_SCAN_PENDING; | |
1da177e4 | 3105 | scsi_queue_work(shost, &rport->scan_work); |
aedf3497 | 3106 | spin_unlock_irqrestore(shost->host_lock, flags); |
19a7b4ae | 3107 | } |
1da177e4 LT |
3108 | } |
3109 | EXPORT_SYMBOL(fc_remote_port_rolechg); | |
3110 | ||
3111 | /** | |
eb44820c | 3112 | * fc_timeout_deleted_rport - Timeout handler for a deleted remote port. |
92740b24 | 3113 | * @work: rport target that failed to reappear in the allotted time. |
eb44820c RL |
3114 | * |
3115 | * Description: An attempt to delete a remote port blocks, and if it fails | |
3116 | * to return in the allotted time this gets called. | |
3117 | */ | |
1da177e4 | 3118 | static void |
c4028958 | 3119 | fc_timeout_deleted_rport(struct work_struct *work) |
1da177e4 | 3120 | { |
c4028958 DH |
3121 | struct fc_rport *rport = |
3122 | container_of(work, struct fc_rport, dev_loss_work.work); | |
19a7b4ae | 3123 | struct Scsi_Host *shost = rport_to_shost(rport); |
4be98c0c | 3124 | struct fc_internal *i = to_fc_internal(shost->transportt); |
aedf3497 | 3125 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
19a7b4ae | 3126 | unsigned long flags; |
8798a694 | 3127 | int do_callback = 0; |
1da177e4 | 3128 | |
19a7b4ae | 3129 | spin_lock_irqsave(shost->host_lock, flags); |
1da177e4 | 3130 | |
aedf3497 JS |
3131 | rport->flags &= ~FC_RPORT_DEVLOSS_PENDING; |
3132 | ||
1da177e4 | 3133 | /* |
92740b24 JS |
3134 | * If the port is ONLINE, then it came back. If it was a SCSI |
3135 | * target, validate it still is. If not, tear down the | |
3136 | * scsi_target on it. | |
1da177e4 | 3137 | */ |
aedf3497 | 3138 | if ((rport->port_state == FC_PORTSTATE_ONLINE) && |
92740b24 | 3139 | (rport->scsi_target_id != -1) && |
a53eb5e0 | 3140 | !(rport->roles & FC_PORT_ROLE_FCP_TARGET)) { |
19a7b4ae | 3141 | dev_printk(KERN_ERR, &rport->dev, |
aedf3497 JS |
3142 | "blocked FC remote port time out: no longer" |
3143 | " a FCP target, removing starget\n"); | |
aedf3497 | 3144 | spin_unlock_irqrestore(shost->host_lock, flags); |
5d9fb5cc | 3145 | scsi_target_unblock(&rport->dev, SDEV_TRANSPORT_OFFLINE); |
a0785edf | 3146 | fc_queue_work(shost, &rport->stgt_delete_work); |
19a7b4ae JSEC |
3147 | return; |
3148 | } | |
1da177e4 | 3149 | |
92740b24 | 3150 | /* NOOP state - we're flushing workq's */ |
19a7b4ae JSEC |
3151 | if (rport->port_state != FC_PORTSTATE_BLOCKED) { |
3152 | spin_unlock_irqrestore(shost->host_lock, flags); | |
3153 | dev_printk(KERN_ERR, &rport->dev, | |
92740b24 JS |
3154 | "blocked FC remote port time out: leaving" |
3155 | " rport%s alone\n", | |
3156 | (rport->scsi_target_id != -1) ? " and starget" : ""); | |
19a7b4ae JSEC |
3157 | return; |
3158 | } | |
1da177e4 | 3159 | |
92740b24 JS |
3160 | if ((fc_host->tgtid_bind_type == FC_TGTID_BIND_NONE) || |
3161 | (rport->scsi_target_id == -1)) { | |
aedf3497 JS |
3162 | list_del(&rport->peers); |
3163 | rport->port_state = FC_PORTSTATE_DELETED; | |
19a7b4ae | 3164 | dev_printk(KERN_ERR, &rport->dev, |
92740b24 JS |
3165 | "blocked FC remote port time out: removing" |
3166 | " rport%s\n", | |
3167 | (rport->scsi_target_id != -1) ? " and starget" : ""); | |
aedf3497 JS |
3168 | fc_queue_work(shost, &rport->rport_delete_work); |
3169 | spin_unlock_irqrestore(shost->host_lock, flags); | |
19a7b4ae JSEC |
3170 | return; |
3171 | } | |
1da177e4 | 3172 | |
19a7b4ae JSEC |
3173 | dev_printk(KERN_ERR, &rport->dev, |
3174 | "blocked FC remote port time out: removing target and " | |
3175 | "saving binding\n"); | |
3176 | ||
aedf3497 | 3177 | list_move_tail(&rport->peers, &fc_host->rport_bindings); |
1da177e4 LT |
3178 | |
3179 | /* | |
19a7b4ae JSEC |
3180 | * Note: We do not remove or clear the hostdata area. This allows |
3181 | * host-specific target data to persist along with the | |
3182 | * scsi_target_id. It's up to the host to manage it's hostdata area. | |
1da177e4 | 3183 | */ |
1da177e4 | 3184 | |
19a7b4ae JSEC |
3185 | /* |
3186 | * Reinitialize port attributes that may change if the port comes back. | |
3187 | */ | |
3188 | rport->maxframe_size = -1; | |
3189 | rport->supported_classes = FC_COS_UNSPECIFIED; | |
a53eb5e0 | 3190 | rport->roles = FC_PORT_ROLE_UNKNOWN; |
aedf3497 | 3191 | rport->port_state = FC_PORTSTATE_NOTPRESENT; |
fff9d40c | 3192 | rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT; |
1da177e4 | 3193 | |
f78badb1 JS |
3194 | /* |
3195 | * Pre-emptively kill I/O rather than waiting for the work queue | |
3196 | * item to teardown the starget. (FCOE libFC folks prefer this | |
3197 | * and to have the rport_port_id still set when it's done). | |
3198 | */ | |
3199 | spin_unlock_irqrestore(shost->host_lock, flags); | |
3200 | fc_terminate_rport_io(rport); | |
3201 | ||
8798a694 MR |
3202 | spin_lock_irqsave(shost->host_lock, flags); |
3203 | ||
3204 | if (rport->port_state == FC_PORTSTATE_NOTPRESENT) { /* still missing */ | |
f78badb1 | 3205 | |
8798a694 MR |
3206 | /* remove the identifiers that aren't used in the consisting binding */ |
3207 | switch (fc_host->tgtid_bind_type) { | |
3208 | case FC_TGTID_BIND_BY_WWPN: | |
3209 | rport->node_name = -1; | |
3210 | rport->port_id = -1; | |
3211 | break; | |
3212 | case FC_TGTID_BIND_BY_WWNN: | |
3213 | rport->port_name = -1; | |
3214 | rport->port_id = -1; | |
3215 | break; | |
3216 | case FC_TGTID_BIND_BY_ID: | |
3217 | rport->node_name = -1; | |
3218 | rport->port_name = -1; | |
3219 | break; | |
3220 | case FC_TGTID_BIND_NONE: /* to keep compiler happy */ | |
3221 | break; | |
3222 | } | |
3223 | ||
3224 | /* | |
3225 | * As this only occurs if the remote port (scsi target) | |
3226 | * went away and didn't come back - we'll remove | |
3227 | * all attached scsi devices. | |
3228 | */ | |
3229 | rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE; | |
3230 | fc_queue_work(shost, &rport->stgt_delete_work); | |
3231 | ||
3232 | do_callback = 1; | |
19a7b4ae JSEC |
3233 | } |
3234 | ||
8798a694 | 3235 | spin_unlock_irqrestore(shost->host_lock, flags); |
4be98c0c JS |
3236 | |
3237 | /* | |
3238 | * Notify the driver that the rport is now dead. The LLDD will | |
3239 | * also guarantee that any communication to the rport is terminated | |
3240 | * | |
3241 | * Note: we set the CALLBK_DONE flag above to correspond | |
3242 | */ | |
8798a694 | 3243 | if (do_callback && i->f->dev_loss_tmo_callbk) |
4be98c0c | 3244 | i->f->dev_loss_tmo_callbk(rport); |
1da177e4 | 3245 | } |
1da177e4 | 3246 | |
4be98c0c | 3247 | |
0f29b966 | 3248 | /** |
eb44820c | 3249 | * fc_timeout_fail_rport_io - Timeout handler for a fast io failing on a disconnected SCSI target. |
c4028958 | 3250 | * @work: rport to terminate io on. |
0f29b966 JS |
3251 | * |
3252 | * Notes: Only requests the failure of the io, not that all are flushed | |
3253 | * prior to returning. | |
eb44820c | 3254 | */ |
0f29b966 | 3255 | static void |
c4028958 | 3256 | fc_timeout_fail_rport_io(struct work_struct *work) |
0f29b966 | 3257 | { |
c4028958 DH |
3258 | struct fc_rport *rport = |
3259 | container_of(work, struct fc_rport, fail_io_work.work); | |
0f29b966 JS |
3260 | |
3261 | if (rport->port_state != FC_PORTSTATE_BLOCKED) | |
3262 | return; | |
3263 | ||
fff9d40c MC |
3264 | rport->flags |= FC_RPORT_FAST_FAIL_TIMEDOUT; |
3265 | fc_terminate_rport_io(rport); | |
0f29b966 JS |
3266 | } |
3267 | ||
1da177e4 LT |
3268 | /** |
3269 | * fc_scsi_scan_rport - called to perform a scsi scan on a remote port. | |
c4028958 | 3270 | * @work: remote port to be scanned. |
eb44820c | 3271 | */ |
1da177e4 | 3272 | static void |
c4028958 | 3273 | fc_scsi_scan_rport(struct work_struct *work) |
1da177e4 | 3274 | { |
c4028958 DH |
3275 | struct fc_rport *rport = |
3276 | container_of(work, struct fc_rport, scan_work); | |
aedf3497 | 3277 | struct Scsi_Host *shost = rport_to_shost(rport); |
03f002f7 | 3278 | struct fc_internal *i = to_fc_internal(shost->transportt); |
42e33148 JSEC |
3279 | unsigned long flags; |
3280 | ||
aedf3497 | 3281 | if ((rport->port_state == FC_PORTSTATE_ONLINE) && |
03f002f7 CS |
3282 | (rport->roles & FC_PORT_ROLE_FCP_TARGET) && |
3283 | !(i->f->disable_target_scan)) { | |
aedf3497 JS |
3284 | scsi_scan_target(&rport->dev, rport->channel, |
3285 | rport->scsi_target_id, SCAN_WILD_CARD, 1); | |
42e33148 | 3286 | } |
aedf3497 JS |
3287 | |
3288 | spin_lock_irqsave(shost->host_lock, flags); | |
3289 | rport->flags &= ~FC_RPORT_SCAN_PENDING; | |
42e33148 JSEC |
3290 | spin_unlock_irqrestore(shost->host_lock, flags); |
3291 | } | |
3292 | ||
65d430fa CS |
3293 | /** |
3294 | * fc_block_scsi_eh - Block SCSI eh thread for blocked fc_rport | |
3295 | * @cmnd: SCSI command that scsi_eh is trying to recover | |
3296 | * | |
3297 | * This routine can be called from a FC LLD scsi_eh callback. It | |
3298 | * blocks the scsi_eh thread until the fc_rport leaves the | |
2f2eb587 CS |
3299 | * FC_PORTSTATE_BLOCKED, or the fast_io_fail_tmo fires. This is |
3300 | * necessary to avoid the scsi_eh failing recovery actions for blocked | |
3301 | * rports which would lead to offlined SCSI devices. | |
3302 | * | |
3303 | * Returns: 0 if the fc_rport left the state FC_PORTSTATE_BLOCKED. | |
3304 | * FAST_IO_FAIL if the fast_io_fail_tmo fired, this should be | |
3305 | * passed back to scsi_eh. | |
65d430fa | 3306 | */ |
2f2eb587 | 3307 | int fc_block_scsi_eh(struct scsi_cmnd *cmnd) |
65d430fa CS |
3308 | { |
3309 | struct Scsi_Host *shost = cmnd->device->host; | |
3310 | struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); | |
3311 | unsigned long flags; | |
3312 | ||
3313 | spin_lock_irqsave(shost->host_lock, flags); | |
2f2eb587 CS |
3314 | while (rport->port_state == FC_PORTSTATE_BLOCKED && |
3315 | !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)) { | |
65d430fa CS |
3316 | spin_unlock_irqrestore(shost->host_lock, flags); |
3317 | msleep(1000); | |
3318 | spin_lock_irqsave(shost->host_lock, flags); | |
3319 | } | |
3320 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2f2eb587 CS |
3321 | |
3322 | if (rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT) | |
3323 | return FAST_IO_FAIL; | |
3324 | ||
3325 | return 0; | |
65d430fa CS |
3326 | } |
3327 | EXPORT_SYMBOL(fc_block_scsi_eh); | |
42e33148 | 3328 | |
a53eb5e0 | 3329 | /** |
a30c3f69 | 3330 | * fc_vport_setup - allocates and creates a FC virtual port. |
a53eb5e0 JS |
3331 | * @shost: scsi host the virtual port is connected to. |
3332 | * @channel: Channel on shost port connected to. | |
3333 | * @pdev: parent device for vport | |
3334 | * @ids: The world wide names, FC4 port roles, etc for | |
3335 | * the virtual port. | |
3336 | * @ret_vport: The pointer to the created vport. | |
3337 | * | |
3338 | * Allocates and creates the vport structure, calls the parent host | |
3339 | * to instantiate the vport, the completes w/ class and sysfs creation. | |
3340 | * | |
3341 | * Notes: | |
3342 | * This routine assumes no locks are held on entry. | |
eb44820c | 3343 | */ |
a53eb5e0 | 3344 | static int |
a30c3f69 | 3345 | fc_vport_setup(struct Scsi_Host *shost, int channel, struct device *pdev, |
a53eb5e0 JS |
3346 | struct fc_vport_identifiers *ids, struct fc_vport **ret_vport) |
3347 | { | |
3348 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); | |
3349 | struct fc_internal *fci = to_fc_internal(shost->transportt); | |
3350 | struct fc_vport *vport; | |
3351 | struct device *dev; | |
3352 | unsigned long flags; | |
3353 | size_t size; | |
3354 | int error; | |
3355 | ||
3356 | *ret_vport = NULL; | |
3357 | ||
3358 | if ( ! fci->f->vport_create) | |
3359 | return -ENOENT; | |
3360 | ||
3361 | size = (sizeof(struct fc_vport) + fci->f->dd_fcvport_size); | |
3362 | vport = kzalloc(size, GFP_KERNEL); | |
3363 | if (unlikely(!vport)) { | |
cadbd4a5 | 3364 | printk(KERN_ERR "%s: allocation failure\n", __func__); |
a53eb5e0 JS |
3365 | return -ENOMEM; |
3366 | } | |
3367 | ||
3368 | vport->vport_state = FC_VPORT_UNKNOWN; | |
3369 | vport->vport_last_state = FC_VPORT_UNKNOWN; | |
3370 | vport->node_name = ids->node_name; | |
3371 | vport->port_name = ids->port_name; | |
3372 | vport->roles = ids->roles; | |
3373 | vport->vport_type = ids->vport_type; | |
3374 | if (fci->f->dd_fcvport_size) | |
3375 | vport->dd_data = &vport[1]; | |
3376 | vport->shost = shost; | |
3377 | vport->channel = channel; | |
3378 | vport->flags = FC_VPORT_CREATING; | |
9ef3e4a4 | 3379 | INIT_WORK(&vport->vport_delete_work, fc_vport_sched_delete); |
a53eb5e0 JS |
3380 | |
3381 | spin_lock_irqsave(shost->host_lock, flags); | |
3382 | ||
3383 | if (fc_host->npiv_vports_inuse >= fc_host->max_npiv_vports) { | |
3384 | spin_unlock_irqrestore(shost->host_lock, flags); | |
3385 | kfree(vport); | |
3386 | return -ENOSPC; | |
3387 | } | |
3388 | fc_host->npiv_vports_inuse++; | |
3389 | vport->number = fc_host->next_vport_number++; | |
3390 | list_add_tail(&vport->peers, &fc_host->vports); | |
3391 | get_device(&shost->shost_gendev); /* for fc_host->vport list */ | |
3392 | ||
3393 | spin_unlock_irqrestore(shost->host_lock, flags); | |
3394 | ||
3395 | dev = &vport->dev; | |
3396 | device_initialize(dev); /* takes self reference */ | |
3397 | dev->parent = get_device(pdev); /* takes parent reference */ | |
3398 | dev->release = fc_vport_dev_release; | |
71610f55 KS |
3399 | dev_set_name(dev, "vport-%d:%d-%d", |
3400 | shost->host_no, channel, vport->number); | |
a53eb5e0 JS |
3401 | transport_setup_device(dev); |
3402 | ||
3403 | error = device_add(dev); | |
3404 | if (error) { | |
3405 | printk(KERN_ERR "FC Virtual Port device_add failed\n"); | |
3406 | goto delete_vport; | |
3407 | } | |
3408 | transport_add_device(dev); | |
3409 | transport_configure_device(dev); | |
3410 | ||
3411 | error = fci->f->vport_create(vport, ids->disable); | |
3412 | if (error) { | |
3413 | printk(KERN_ERR "FC Virtual Port LLDD Create failed\n"); | |
3414 | goto delete_vport_all; | |
3415 | } | |
3416 | ||
3417 | /* | |
3418 | * if the parent isn't the physical adapter's Scsi_Host, ensure | |
3419 | * the Scsi_Host at least contains ia symlink to the vport. | |
3420 | */ | |
3421 | if (pdev != &shost->shost_gendev) { | |
3422 | error = sysfs_create_link(&shost->shost_gendev.kobj, | |
71610f55 | 3423 | &dev->kobj, dev_name(dev)); |
a53eb5e0 JS |
3424 | if (error) |
3425 | printk(KERN_ERR | |
3426 | "%s: Cannot create vport symlinks for " | |
3427 | "%s, err=%d\n", | |
71610f55 | 3428 | __func__, dev_name(dev), error); |
a53eb5e0 JS |
3429 | } |
3430 | spin_lock_irqsave(shost->host_lock, flags); | |
3431 | vport->flags &= ~FC_VPORT_CREATING; | |
3432 | spin_unlock_irqrestore(shost->host_lock, flags); | |
3433 | ||
3434 | dev_printk(KERN_NOTICE, pdev, | |
71610f55 | 3435 | "%s created via shost%d channel %d\n", dev_name(dev), |
a53eb5e0 JS |
3436 | shost->host_no, channel); |
3437 | ||
3438 | *ret_vport = vport; | |
3439 | ||
3440 | return 0; | |
3441 | ||
3442 | delete_vport_all: | |
3443 | transport_remove_device(dev); | |
3444 | device_del(dev); | |
3445 | delete_vport: | |
3446 | transport_destroy_device(dev); | |
3447 | spin_lock_irqsave(shost->host_lock, flags); | |
3448 | list_del(&vport->peers); | |
3449 | put_device(&shost->shost_gendev); /* for fc_host->vport list */ | |
3450 | fc_host->npiv_vports_inuse--; | |
3451 | spin_unlock_irqrestore(shost->host_lock, flags); | |
3452 | put_device(dev->parent); | |
3453 | kfree(vport); | |
3454 | ||
3455 | return error; | |
3456 | } | |
3457 | ||
a30c3f69 AV |
3458 | /** |
3459 | * fc_vport_create - Admin App or LLDD requests creation of a vport | |
3460 | * @shost: scsi host the virtual port is connected to. | |
3461 | * @channel: channel on shost port connected to. | |
3462 | * @ids: The world wide names, FC4 port roles, etc for | |
3463 | * the virtual port. | |
3464 | * | |
3465 | * Notes: | |
3466 | * This routine assumes no locks are held on entry. | |
3467 | */ | |
3468 | struct fc_vport * | |
3469 | fc_vport_create(struct Scsi_Host *shost, int channel, | |
3470 | struct fc_vport_identifiers *ids) | |
3471 | { | |
3472 | int stat; | |
3473 | struct fc_vport *vport; | |
3474 | ||
3475 | stat = fc_vport_setup(shost, channel, &shost->shost_gendev, | |
3476 | ids, &vport); | |
3477 | return stat ? NULL : vport; | |
3478 | } | |
3479 | EXPORT_SYMBOL(fc_vport_create); | |
a53eb5e0 JS |
3480 | |
3481 | /** | |
3482 | * fc_vport_terminate - Admin App or LLDD requests termination of a vport | |
3483 | * @vport: fc_vport to be terminated | |
3484 | * | |
3485 | * Calls the LLDD vport_delete() function, then deallocates and removes | |
3486 | * the vport from the shost and object tree. | |
3487 | * | |
3488 | * Notes: | |
3489 | * This routine assumes no locks are held on entry. | |
eb44820c | 3490 | */ |
a53eb5e0 JS |
3491 | int |
3492 | fc_vport_terminate(struct fc_vport *vport) | |
3493 | { | |
3494 | struct Scsi_Host *shost = vport_to_shost(vport); | |
3495 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); | |
3496 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
3497 | struct device *dev = &vport->dev; | |
3498 | unsigned long flags; | |
3499 | int stat; | |
3500 | ||
a53eb5e0 JS |
3501 | if (i->f->vport_delete) |
3502 | stat = i->f->vport_delete(vport); | |
3503 | else | |
3504 | stat = -ENOENT; | |
3505 | ||
3506 | spin_lock_irqsave(shost->host_lock, flags); | |
3507 | vport->flags &= ~FC_VPORT_DELETING; | |
3508 | if (!stat) { | |
3509 | vport->flags |= FC_VPORT_DELETED; | |
3510 | list_del(&vport->peers); | |
3511 | fc_host->npiv_vports_inuse--; | |
3512 | put_device(&shost->shost_gendev); /* for fc_host->vport list */ | |
3513 | } | |
3514 | spin_unlock_irqrestore(shost->host_lock, flags); | |
3515 | ||
3516 | if (stat) | |
3517 | return stat; | |
3518 | ||
3519 | if (dev->parent != &shost->shost_gendev) | |
71610f55 | 3520 | sysfs_remove_link(&shost->shost_gendev.kobj, dev_name(dev)); |
a53eb5e0 JS |
3521 | transport_remove_device(dev); |
3522 | device_del(dev); | |
3523 | transport_destroy_device(dev); | |
3524 | ||
3525 | /* | |
3526 | * Removing our self-reference should mean our | |
3527 | * release function gets called, which will drop the remaining | |
3528 | * parent reference and free the data structure. | |
3529 | */ | |
3530 | put_device(dev); /* for self-reference */ | |
3531 | ||
3532 | return 0; /* SUCCESS */ | |
3533 | } | |
3534 | EXPORT_SYMBOL(fc_vport_terminate); | |
3535 | ||
9ef3e4a4 JS |
3536 | /** |
3537 | * fc_vport_sched_delete - workq-based delete request for a vport | |
9ef3e4a4 | 3538 | * @work: vport to be deleted. |
eb44820c | 3539 | */ |
9ef3e4a4 JS |
3540 | static void |
3541 | fc_vport_sched_delete(struct work_struct *work) | |
3542 | { | |
3543 | struct fc_vport *vport = | |
3544 | container_of(work, struct fc_vport, vport_delete_work); | |
3545 | int stat; | |
3546 | ||
3547 | stat = fc_vport_terminate(vport); | |
3548 | if (stat) | |
3549 | dev_printk(KERN_ERR, vport->dev.parent, | |
3550 | "%s: %s could not be deleted created via " | |
cadbd4a5 | 3551 | "shost%d channel %d - error %d\n", __func__, |
71610f55 | 3552 | dev_name(&vport->dev), vport->shost->host_no, |
9ef3e4a4 JS |
3553 | vport->channel, stat); |
3554 | } | |
3555 | ||
a53eb5e0 | 3556 | |
9e4f5e29 JS |
3557 | /* |
3558 | * BSG support | |
3559 | */ | |
3560 | ||
3561 | ||
3562 | /** | |
3563 | * fc_destroy_bsgjob - routine to teardown/delete a fc bsg job | |
3564 | * @job: fc_bsg_job that is to be torn down | |
3565 | */ | |
3566 | static void | |
3567 | fc_destroy_bsgjob(struct fc_bsg_job *job) | |
3568 | { | |
3569 | unsigned long flags; | |
3570 | ||
3571 | spin_lock_irqsave(&job->job_lock, flags); | |
3572 | if (job->ref_cnt) { | |
3573 | spin_unlock_irqrestore(&job->job_lock, flags); | |
3574 | return; | |
3575 | } | |
3576 | spin_unlock_irqrestore(&job->job_lock, flags); | |
3577 | ||
3578 | put_device(job->dev); /* release reference for the request */ | |
3579 | ||
3580 | kfree(job->request_payload.sg_list); | |
3581 | kfree(job->reply_payload.sg_list); | |
3582 | kfree(job); | |
3583 | } | |
3584 | ||
9e4f5e29 JS |
3585 | /** |
3586 | * fc_bsg_jobdone - completion routine for bsg requests that the LLD has | |
3587 | * completed | |
3588 | * @job: fc_bsg_job that is complete | |
3589 | */ | |
3590 | static void | |
3591 | fc_bsg_jobdone(struct fc_bsg_job *job) | |
3592 | { | |
3593 | struct request *req = job->req; | |
3594 | struct request *rsp = req->next_rq; | |
9e4f5e29 JS |
3595 | int err; |
3596 | ||
9e4f5e29 | 3597 | err = job->req->errors = job->reply->result; |
b5c6f776 | 3598 | |
9e4f5e29 JS |
3599 | if (err < 0) |
3600 | /* we're only returning the result field in the reply */ | |
3601 | job->req->sense_len = sizeof(uint32_t); | |
3602 | else | |
3603 | job->req->sense_len = job->reply_len; | |
3604 | ||
3605 | /* we assume all request payload was transferred, residual == 0 */ | |
3606 | req->resid_len = 0; | |
3607 | ||
3608 | if (rsp) { | |
3609 | WARN_ON(job->reply->reply_payload_rcv_len > rsp->resid_len); | |
3610 | ||
3611 | /* set reply (bidi) residual */ | |
3612 | rsp->resid_len -= min(job->reply->reply_payload_rcv_len, | |
3613 | rsp->resid_len); | |
3614 | } | |
b5c6f776 GM |
3615 | blk_complete_request(req); |
3616 | } | |
3617 | ||
3618 | /** | |
3619 | * fc_bsg_softirq_done - softirq done routine for destroying the bsg requests | |
fe5d20c8 | 3620 | * @rq: BSG request that holds the job to be destroyed |
b5c6f776 GM |
3621 | */ |
3622 | static void fc_bsg_softirq_done(struct request *rq) | |
3623 | { | |
3624 | struct fc_bsg_job *job = rq->special; | |
3625 | unsigned long flags; | |
9e4f5e29 | 3626 | |
b5c6f776 GM |
3627 | spin_lock_irqsave(&job->job_lock, flags); |
3628 | job->state_flags |= FC_RQST_STATE_DONE; | |
3629 | job->ref_cnt--; | |
3630 | spin_unlock_irqrestore(&job->job_lock, flags); | |
9e4f5e29 | 3631 | |
b5c6f776 | 3632 | blk_end_request_all(rq, rq->errors); |
9e4f5e29 JS |
3633 | fc_destroy_bsgjob(job); |
3634 | } | |
3635 | ||
9e4f5e29 JS |
3636 | /** |
3637 | * fc_bsg_job_timeout - handler for when a bsg request timesout | |
3638 | * @req: request that timed out | |
3639 | */ | |
3640 | static enum blk_eh_timer_return | |
3641 | fc_bsg_job_timeout(struct request *req) | |
3642 | { | |
3643 | struct fc_bsg_job *job = (void *) req->special; | |
3644 | struct Scsi_Host *shost = job->shost; | |
3645 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
3646 | unsigned long flags; | |
3647 | int err = 0, done = 0; | |
3648 | ||
3649 | if (job->rport && job->rport->port_state == FC_PORTSTATE_BLOCKED) | |
3650 | return BLK_EH_RESET_TIMER; | |
3651 | ||
3652 | spin_lock_irqsave(&job->job_lock, flags); | |
3653 | if (job->state_flags & FC_RQST_STATE_DONE) | |
3654 | done = 1; | |
3655 | else | |
3656 | job->ref_cnt++; | |
3657 | spin_unlock_irqrestore(&job->job_lock, flags); | |
3658 | ||
3659 | if (!done && i->f->bsg_timeout) { | |
3660 | /* call LLDD to abort the i/o as it has timed out */ | |
3661 | err = i->f->bsg_timeout(job); | |
b8f08645 SS |
3662 | if (err == -EAGAIN) { |
3663 | job->ref_cnt--; | |
3664 | return BLK_EH_RESET_TIMER; | |
3665 | } else if (err) | |
9e4f5e29 JS |
3666 | printk(KERN_ERR "ERROR: FC BSG request timeout - LLD " |
3667 | "abort failed with status %d\n", err); | |
3668 | } | |
3669 | ||
9e4f5e29 | 3670 | /* the blk_end_sync_io() doesn't check the error */ |
47e7e89e GM |
3671 | if (done) |
3672 | return BLK_EH_NOT_HANDLED; | |
3673 | else | |
3674 | return BLK_EH_HANDLED; | |
9e4f5e29 JS |
3675 | } |
3676 | ||
9e4f5e29 JS |
3677 | static int |
3678 | fc_bsg_map_buffer(struct fc_bsg_buffer *buf, struct request *req) | |
3679 | { | |
3680 | size_t sz = (sizeof(struct scatterlist) * req->nr_phys_segments); | |
3681 | ||
3682 | BUG_ON(!req->nr_phys_segments); | |
3683 | ||
3684 | buf->sg_list = kzalloc(sz, GFP_KERNEL); | |
3685 | if (!buf->sg_list) | |
3686 | return -ENOMEM; | |
3687 | sg_init_table(buf->sg_list, req->nr_phys_segments); | |
3688 | buf->sg_cnt = blk_rq_map_sg(req->q, req, buf->sg_list); | |
3689 | buf->payload_len = blk_rq_bytes(req); | |
3690 | return 0; | |
3691 | } | |
3692 | ||
3693 | ||
3694 | /** | |
3695 | * fc_req_to_bsgjob - Allocate/create the fc_bsg_job structure for the | |
3696 | * bsg request | |
3697 | * @shost: SCSI Host corresponding to the bsg object | |
3698 | * @rport: (optional) FC Remote Port corresponding to the bsg object | |
3699 | * @req: BSG request that needs a job structure | |
3700 | */ | |
3701 | static int | |
3702 | fc_req_to_bsgjob(struct Scsi_Host *shost, struct fc_rport *rport, | |
3703 | struct request *req) | |
3704 | { | |
3705 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
3706 | struct request *rsp = req->next_rq; | |
3707 | struct fc_bsg_job *job; | |
3708 | int ret; | |
3709 | ||
3710 | BUG_ON(req->special); | |
3711 | ||
3712 | job = kzalloc(sizeof(struct fc_bsg_job) + i->f->dd_bsg_size, | |
3713 | GFP_KERNEL); | |
3714 | if (!job) | |
3715 | return -ENOMEM; | |
3716 | ||
3717 | /* | |
3718 | * Note: this is a bit silly. | |
3719 | * The request gets formatted as a SGIO v4 ioctl request, which | |
3720 | * then gets reformatted as a blk request, which then gets | |
3721 | * reformatted as a fc bsg request. And on completion, we have | |
3722 | * to wrap return results such that SGIO v4 thinks it was a scsi | |
3723 | * status. I hope this was all worth it. | |
3724 | */ | |
3725 | ||
3726 | req->special = job; | |
3727 | job->shost = shost; | |
3728 | job->rport = rport; | |
3729 | job->req = req; | |
3730 | if (i->f->dd_bsg_size) | |
3731 | job->dd_data = (void *)&job[1]; | |
3732 | spin_lock_init(&job->job_lock); | |
3733 | job->request = (struct fc_bsg_request *)req->cmd; | |
3734 | job->request_len = req->cmd_len; | |
3735 | job->reply = req->sense; | |
3736 | job->reply_len = SCSI_SENSE_BUFFERSIZE; /* Size of sense buffer | |
3737 | * allocated */ | |
3738 | if (req->bio) { | |
3739 | ret = fc_bsg_map_buffer(&job->request_payload, req); | |
3740 | if (ret) | |
3741 | goto failjob_rls_job; | |
3742 | } | |
3743 | if (rsp && rsp->bio) { | |
3744 | ret = fc_bsg_map_buffer(&job->reply_payload, rsp); | |
3745 | if (ret) | |
3746 | goto failjob_rls_rqst_payload; | |
3747 | } | |
3748 | job->job_done = fc_bsg_jobdone; | |
3749 | if (rport) | |
3750 | job->dev = &rport->dev; | |
3751 | else | |
3752 | job->dev = &shost->shost_gendev; | |
3753 | get_device(job->dev); /* take a reference for the request */ | |
3754 | ||
3755 | job->ref_cnt = 1; | |
3756 | ||
3757 | return 0; | |
3758 | ||
3759 | ||
3760 | failjob_rls_rqst_payload: | |
3761 | kfree(job->request_payload.sg_list); | |
3762 | failjob_rls_job: | |
3763 | kfree(job); | |
3764 | return -ENOMEM; | |
3765 | } | |
3766 | ||
3767 | ||
3768 | enum fc_dispatch_result { | |
3769 | FC_DISPATCH_BREAK, /* on return, q is locked, break from q loop */ | |
3770 | FC_DISPATCH_LOCKED, /* on return, q is locked, continue on */ | |
3771 | FC_DISPATCH_UNLOCKED, /* on return, q is unlocked, continue on */ | |
3772 | }; | |
3773 | ||
3774 | ||
3775 | /** | |
3776 | * fc_bsg_host_dispatch - process fc host bsg requests and dispatch to LLDD | |
5415907a | 3777 | * @q: fc host request queue |
9e4f5e29 JS |
3778 | * @shost: scsi host rport attached to |
3779 | * @job: bsg job to be processed | |
3780 | */ | |
3781 | static enum fc_dispatch_result | |
3782 | fc_bsg_host_dispatch(struct request_queue *q, struct Scsi_Host *shost, | |
3783 | struct fc_bsg_job *job) | |
3784 | { | |
3785 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
3786 | int cmdlen = sizeof(uint32_t); /* start with length of msgcode */ | |
3787 | int ret; | |
3788 | ||
3789 | /* Validate the host command */ | |
3790 | switch (job->request->msgcode) { | |
3791 | case FC_BSG_HST_ADD_RPORT: | |
3792 | cmdlen += sizeof(struct fc_bsg_host_add_rport); | |
3793 | break; | |
3794 | ||
3795 | case FC_BSG_HST_DEL_RPORT: | |
3796 | cmdlen += sizeof(struct fc_bsg_host_del_rport); | |
3797 | break; | |
3798 | ||
3799 | case FC_BSG_HST_ELS_NOLOGIN: | |
3800 | cmdlen += sizeof(struct fc_bsg_host_els); | |
3801 | /* there better be a xmt and rcv payloads */ | |
3802 | if ((!job->request_payload.payload_len) || | |
3803 | (!job->reply_payload.payload_len)) { | |
3804 | ret = -EINVAL; | |
3805 | goto fail_host_msg; | |
3806 | } | |
3807 | break; | |
3808 | ||
3809 | case FC_BSG_HST_CT: | |
3810 | cmdlen += sizeof(struct fc_bsg_host_ct); | |
3811 | /* there better be xmt and rcv payloads */ | |
3812 | if ((!job->request_payload.payload_len) || | |
3813 | (!job->reply_payload.payload_len)) { | |
3814 | ret = -EINVAL; | |
3815 | goto fail_host_msg; | |
3816 | } | |
3817 | break; | |
3818 | ||
3819 | case FC_BSG_HST_VENDOR: | |
3820 | cmdlen += sizeof(struct fc_bsg_host_vendor); | |
3821 | if ((shost->hostt->vendor_id == 0L) || | |
3822 | (job->request->rqst_data.h_vendor.vendor_id != | |
3823 | shost->hostt->vendor_id)) { | |
3824 | ret = -ESRCH; | |
3825 | goto fail_host_msg; | |
3826 | } | |
3827 | break; | |
3828 | ||
3829 | default: | |
3830 | ret = -EBADR; | |
3831 | goto fail_host_msg; | |
3832 | } | |
3833 | ||
3834 | /* check if we really have all the request data needed */ | |
3835 | if (job->request_len < cmdlen) { | |
3836 | ret = -ENOMSG; | |
3837 | goto fail_host_msg; | |
3838 | } | |
3839 | ||
3840 | ret = i->f->bsg_request(job); | |
3841 | if (!ret) | |
3842 | return FC_DISPATCH_UNLOCKED; | |
3843 | ||
3844 | fail_host_msg: | |
3845 | /* return the errno failure code as the only status */ | |
3846 | BUG_ON(job->reply_len < sizeof(uint32_t)); | |
61ec33eb | 3847 | job->reply->reply_payload_rcv_len = 0; |
9e4f5e29 JS |
3848 | job->reply->result = ret; |
3849 | job->reply_len = sizeof(uint32_t); | |
3850 | fc_bsg_jobdone(job); | |
3851 | return FC_DISPATCH_UNLOCKED; | |
3852 | } | |
3853 | ||
3854 | ||
3855 | /* | |
3856 | * fc_bsg_goose_queue - restart rport queue in case it was stopped | |
3857 | * @rport: rport to be restarted | |
3858 | */ | |
3859 | static void | |
3860 | fc_bsg_goose_queue(struct fc_rport *rport) | |
3861 | { | |
9e4f5e29 JS |
3862 | if (!rport->rqst_q) |
3863 | return; | |
3864 | ||
c21e6beb JA |
3865 | /* |
3866 | * This get/put dance makes no sense | |
3867 | */ | |
9e4f5e29 | 3868 | get_device(&rport->dev); |
c21e6beb | 3869 | blk_run_queue_async(rport->rqst_q); |
9e4f5e29 JS |
3870 | put_device(&rport->dev); |
3871 | } | |
3872 | ||
9e4f5e29 JS |
3873 | /** |
3874 | * fc_bsg_rport_dispatch - process rport bsg requests and dispatch to LLDD | |
5415907a | 3875 | * @q: rport request queue |
9e4f5e29 JS |
3876 | * @shost: scsi host rport attached to |
3877 | * @rport: rport request destined to | |
3878 | * @job: bsg job to be processed | |
3879 | */ | |
3880 | static enum fc_dispatch_result | |
3881 | fc_bsg_rport_dispatch(struct request_queue *q, struct Scsi_Host *shost, | |
3882 | struct fc_rport *rport, struct fc_bsg_job *job) | |
3883 | { | |
3884 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
3885 | int cmdlen = sizeof(uint32_t); /* start with length of msgcode */ | |
3886 | int ret; | |
3887 | ||
3888 | /* Validate the rport command */ | |
3889 | switch (job->request->msgcode) { | |
3890 | case FC_BSG_RPT_ELS: | |
3891 | cmdlen += sizeof(struct fc_bsg_rport_els); | |
3892 | goto check_bidi; | |
3893 | ||
3894 | case FC_BSG_RPT_CT: | |
3895 | cmdlen += sizeof(struct fc_bsg_rport_ct); | |
3896 | check_bidi: | |
3897 | /* there better be xmt and rcv payloads */ | |
3898 | if ((!job->request_payload.payload_len) || | |
3899 | (!job->reply_payload.payload_len)) { | |
3900 | ret = -EINVAL; | |
3901 | goto fail_rport_msg; | |
3902 | } | |
3903 | break; | |
3904 | default: | |
3905 | ret = -EBADR; | |
3906 | goto fail_rport_msg; | |
3907 | } | |
3908 | ||
3909 | /* check if we really have all the request data needed */ | |
3910 | if (job->request_len < cmdlen) { | |
3911 | ret = -ENOMSG; | |
3912 | goto fail_rport_msg; | |
3913 | } | |
3914 | ||
3915 | ret = i->f->bsg_request(job); | |
3916 | if (!ret) | |
3917 | return FC_DISPATCH_UNLOCKED; | |
3918 | ||
3919 | fail_rport_msg: | |
3920 | /* return the errno failure code as the only status */ | |
3921 | BUG_ON(job->reply_len < sizeof(uint32_t)); | |
61ec33eb | 3922 | job->reply->reply_payload_rcv_len = 0; |
9e4f5e29 JS |
3923 | job->reply->result = ret; |
3924 | job->reply_len = sizeof(uint32_t); | |
3925 | fc_bsg_jobdone(job); | |
3926 | return FC_DISPATCH_UNLOCKED; | |
3927 | } | |
3928 | ||
3929 | ||
3930 | /** | |
3931 | * fc_bsg_request_handler - generic handler for bsg requests | |
3932 | * @q: request queue to manage | |
3933 | * @shost: Scsi_Host related to the bsg object | |
3934 | * @rport: FC remote port related to the bsg object (optional) | |
3935 | * @dev: device structure for bsg object | |
3936 | */ | |
3937 | static void | |
3938 | fc_bsg_request_handler(struct request_queue *q, struct Scsi_Host *shost, | |
3939 | struct fc_rport *rport, struct device *dev) | |
3940 | { | |
3941 | struct request *req; | |
3942 | struct fc_bsg_job *job; | |
3943 | enum fc_dispatch_result ret; | |
3944 | ||
3945 | if (!get_device(dev)) | |
3946 | return; | |
3947 | ||
7eaceacc | 3948 | while (1) { |
2bc1c59d MC |
3949 | if (rport && (rport->port_state == FC_PORTSTATE_BLOCKED) && |
3950 | !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)) | |
3951 | break; | |
9e4f5e29 JS |
3952 | |
3953 | req = blk_fetch_request(q); | |
3954 | if (!req) | |
3955 | break; | |
3956 | ||
3957 | if (rport && (rport->port_state != FC_PORTSTATE_ONLINE)) { | |
3958 | req->errors = -ENXIO; | |
3959 | spin_unlock_irq(q->queue_lock); | |
d88a714b | 3960 | blk_end_request_all(req, -ENXIO); |
9e4f5e29 JS |
3961 | spin_lock_irq(q->queue_lock); |
3962 | continue; | |
3963 | } | |
3964 | ||
3965 | spin_unlock_irq(q->queue_lock); | |
3966 | ||
3967 | ret = fc_req_to_bsgjob(shost, rport, req); | |
3968 | if (ret) { | |
3969 | req->errors = ret; | |
d88a714b | 3970 | blk_end_request_all(req, ret); |
9e4f5e29 JS |
3971 | spin_lock_irq(q->queue_lock); |
3972 | continue; | |
3973 | } | |
3974 | ||
3975 | job = req->special; | |
3976 | ||
3977 | /* check if we have the msgcode value at least */ | |
3978 | if (job->request_len < sizeof(uint32_t)) { | |
3979 | BUG_ON(job->reply_len < sizeof(uint32_t)); | |
61ec33eb | 3980 | job->reply->reply_payload_rcv_len = 0; |
9e4f5e29 JS |
3981 | job->reply->result = -ENOMSG; |
3982 | job->reply_len = sizeof(uint32_t); | |
3983 | fc_bsg_jobdone(job); | |
3984 | spin_lock_irq(q->queue_lock); | |
3985 | continue; | |
3986 | } | |
3987 | ||
3988 | /* the dispatch routines will unlock the queue_lock */ | |
3989 | if (rport) | |
3990 | ret = fc_bsg_rport_dispatch(q, shost, rport, job); | |
3991 | else | |
3992 | ret = fc_bsg_host_dispatch(q, shost, job); | |
3993 | ||
3994 | /* did dispatcher hit state that can't process any more */ | |
3995 | if (ret == FC_DISPATCH_BREAK) | |
3996 | break; | |
3997 | ||
3998 | /* did dispatcher had released the lock */ | |
3999 | if (ret == FC_DISPATCH_UNLOCKED) | |
4000 | spin_lock_irq(q->queue_lock); | |
4001 | } | |
4002 | ||
4003 | spin_unlock_irq(q->queue_lock); | |
4004 | put_device(dev); | |
4005 | spin_lock_irq(q->queue_lock); | |
4006 | } | |
4007 | ||
4008 | ||
4009 | /** | |
4010 | * fc_bsg_host_handler - handler for bsg requests for a fc host | |
4011 | * @q: fc host request queue | |
4012 | */ | |
4013 | static void | |
4014 | fc_bsg_host_handler(struct request_queue *q) | |
4015 | { | |
4016 | struct Scsi_Host *shost = q->queuedata; | |
4017 | ||
4018 | fc_bsg_request_handler(q, shost, NULL, &shost->shost_gendev); | |
4019 | } | |
4020 | ||
4021 | ||
4022 | /** | |
4023 | * fc_bsg_rport_handler - handler for bsg requests for a fc rport | |
4024 | * @q: rport request queue | |
4025 | */ | |
4026 | static void | |
4027 | fc_bsg_rport_handler(struct request_queue *q) | |
4028 | { | |
4029 | struct fc_rport *rport = q->queuedata; | |
4030 | struct Scsi_Host *shost = rport_to_shost(rport); | |
4031 | ||
4032 | fc_bsg_request_handler(q, shost, rport, &rport->dev); | |
4033 | } | |
4034 | ||
4035 | ||
4036 | /** | |
4037 | * fc_bsg_hostadd - Create and add the bsg hooks so we can receive requests | |
4038 | * @shost: shost for fc_host | |
4039 | * @fc_host: fc_host adding the structures to | |
4040 | */ | |
4041 | static int | |
4042 | fc_bsg_hostadd(struct Scsi_Host *shost, struct fc_host_attrs *fc_host) | |
4043 | { | |
4044 | struct device *dev = &shost->shost_gendev; | |
4045 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
4046 | struct request_queue *q; | |
4047 | int err; | |
3c559ea8 | 4048 | char bsg_name[20]; |
9e4f5e29 JS |
4049 | |
4050 | fc_host->rqst_q = NULL; | |
4051 | ||
4052 | if (!i->f->bsg_request) | |
4053 | return -ENOTSUPP; | |
4054 | ||
4055 | snprintf(bsg_name, sizeof(bsg_name), | |
4056 | "fc_host%d", shost->host_no); | |
4057 | ||
4058 | q = __scsi_alloc_queue(shost, fc_bsg_host_handler); | |
4059 | if (!q) { | |
4060 | printk(KERN_ERR "fc_host%d: bsg interface failed to " | |
4061 | "initialize - no request queue\n", | |
4062 | shost->host_no); | |
4063 | return -ENOMEM; | |
4064 | } | |
4065 | ||
4066 | q->queuedata = shost; | |
4067 | queue_flag_set_unlocked(QUEUE_FLAG_BIDI, q); | |
b5c6f776 | 4068 | blk_queue_softirq_done(q, fc_bsg_softirq_done); |
9e4f5e29 JS |
4069 | blk_queue_rq_timed_out(q, fc_bsg_job_timeout); |
4070 | blk_queue_rq_timeout(q, FC_DEFAULT_BSG_TIMEOUT); | |
4071 | ||
4072 | err = bsg_register_queue(q, dev, bsg_name, NULL); | |
4073 | if (err) { | |
4074 | printk(KERN_ERR "fc_host%d: bsg interface failed to " | |
4075 | "initialize - register queue\n", | |
4076 | shost->host_no); | |
4077 | blk_cleanup_queue(q); | |
4078 | return err; | |
4079 | } | |
4080 | ||
4081 | fc_host->rqst_q = q; | |
4082 | return 0; | |
4083 | } | |
4084 | ||
4085 | ||
4086 | /** | |
4087 | * fc_bsg_rportadd - Create and add the bsg hooks so we can receive requests | |
4088 | * @shost: shost that rport is attached to | |
4089 | * @rport: rport that the bsg hooks are being attached to | |
4090 | */ | |
4091 | static int | |
4092 | fc_bsg_rportadd(struct Scsi_Host *shost, struct fc_rport *rport) | |
4093 | { | |
4094 | struct device *dev = &rport->dev; | |
4095 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
4096 | struct request_queue *q; | |
4097 | int err; | |
4098 | ||
4099 | rport->rqst_q = NULL; | |
4100 | ||
4101 | if (!i->f->bsg_request) | |
4102 | return -ENOTSUPP; | |
4103 | ||
4104 | q = __scsi_alloc_queue(shost, fc_bsg_rport_handler); | |
4105 | if (!q) { | |
4106 | printk(KERN_ERR "%s: bsg interface failed to " | |
4107 | "initialize - no request queue\n", | |
4108 | dev->kobj.name); | |
4109 | return -ENOMEM; | |
4110 | } | |
4111 | ||
4112 | q->queuedata = rport; | |
4113 | queue_flag_set_unlocked(QUEUE_FLAG_BIDI, q); | |
b5c6f776 | 4114 | blk_queue_softirq_done(q, fc_bsg_softirq_done); |
9e4f5e29 JS |
4115 | blk_queue_rq_timed_out(q, fc_bsg_job_timeout); |
4116 | blk_queue_rq_timeout(q, BLK_DEFAULT_SG_TIMEOUT); | |
4117 | ||
4118 | err = bsg_register_queue(q, dev, NULL, NULL); | |
4119 | if (err) { | |
4120 | printk(KERN_ERR "%s: bsg interface failed to " | |
4121 | "initialize - register queue\n", | |
4122 | dev->kobj.name); | |
4123 | blk_cleanup_queue(q); | |
4124 | return err; | |
4125 | } | |
4126 | ||
4127 | rport->rqst_q = q; | |
4128 | return 0; | |
4129 | } | |
4130 | ||
4131 | ||
4132 | /** | |
4133 | * fc_bsg_remove - Deletes the bsg hooks on fchosts/rports | |
4134 | * @q: the request_queue that is to be torn down. | |
78d16341 JS |
4135 | * |
4136 | * Notes: | |
4137 | * Before unregistering the queue empty any requests that are blocked | |
4138 | * | |
4139 | * | |
9e4f5e29 JS |
4140 | */ |
4141 | static void | |
4142 | fc_bsg_remove(struct request_queue *q) | |
4143 | { | |
4144 | if (q) { | |
4145 | bsg_unregister_queue(q); | |
4146 | blk_cleanup_queue(q); | |
4147 | } | |
4148 | } | |
4149 | ||
4150 | ||
9ef3e4a4 JS |
4151 | /* Original Author: Martin Hicks */ |
4152 | MODULE_AUTHOR("James Smart"); | |
1da177e4 LT |
4153 | MODULE_DESCRIPTION("FC Transport Attributes"); |
4154 | MODULE_LICENSE("GPL"); | |
4155 | ||
4156 | module_init(fc_transport_init); | |
4157 | module_exit(fc_transport_exit); |