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 <linux/netlink.h> |
39 | #include <net/netlink.h> | |
40 | #include <scsi/scsi_netlink_fc.h> | |
9e4f5e29 | 41 | #include <scsi/scsi_bsg_fc.h> |
1da177e4 | 42 | #include "scsi_priv.h" |
7525236d | 43 | #include "scsi_transport_fc_internal.h" |
1da177e4 | 44 | |
aedf3497 | 45 | static int fc_queue_work(struct Scsi_Host *, struct work_struct *); |
9ef3e4a4 | 46 | static void fc_vport_sched_delete(struct work_struct *work); |
a30c3f69 | 47 | static int fc_vport_setup(struct Scsi_Host *shost, int channel, |
a53eb5e0 JS |
48 | struct device *pdev, struct fc_vport_identifiers *ids, |
49 | struct fc_vport **vport); | |
9e4f5e29 JS |
50 | static int fc_bsg_hostadd(struct Scsi_Host *, struct fc_host_attrs *); |
51 | static int fc_bsg_rportadd(struct Scsi_Host *, struct fc_rport *); | |
52 | static void fc_bsg_remove(struct request_queue *); | |
53 | static void fc_bsg_goose_queue(struct fc_rport *); | |
a53eb5e0 | 54 | |
43ca910a MC |
55 | /* |
56 | * Module Parameters | |
57 | */ | |
58 | ||
59 | /* | |
60 | * dev_loss_tmo: the default number of seconds that the FC transport | |
61 | * should insulate the loss of a remote port. | |
62 | * The maximum will be capped by the value of SCSI_DEVICE_BLOCK_MAX_TIMEOUT. | |
63 | */ | |
64 | static unsigned int fc_dev_loss_tmo = 60; /* seconds */ | |
65 | ||
66 | module_param_named(dev_loss_tmo, fc_dev_loss_tmo, uint, S_IRUGO|S_IWUSR); | |
67 | MODULE_PARM_DESC(dev_loss_tmo, | |
68 | "Maximum number of seconds that the FC transport should" | |
69 | " insulate the loss of a remote port. Once this value is" | |
70 | " exceeded, the scsi target is removed. Value should be" | |
71 | " between 1 and SCSI_DEVICE_BLOCK_MAX_TIMEOUT if" | |
72 | " fast_io_fail_tmo is not set."); | |
73 | ||
1da177e4 LT |
74 | /* |
75 | * Redefine so that we can have same named attributes in the | |
76 | * sdev/starget/host objects. | |
77 | */ | |
ee959b00 TJ |
78 | #define FC_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \ |
79 | struct device_attribute device_attr_##_prefix##_##_name = \ | |
1da177e4 LT |
80 | __ATTR(_name,_mode,_show,_store) |
81 | ||
82 | #define fc_enum_name_search(title, table_type, table) \ | |
83 | static const char *get_fc_##title##_name(enum table_type table_key) \ | |
84 | { \ | |
85 | int i; \ | |
86 | char *name = NULL; \ | |
87 | \ | |
6391a113 | 88 | for (i = 0; i < ARRAY_SIZE(table); i++) { \ |
1da177e4 LT |
89 | if (table[i].value == table_key) { \ |
90 | name = table[i].name; \ | |
91 | break; \ | |
92 | } \ | |
93 | } \ | |
94 | return name; \ | |
95 | } | |
96 | ||
97 | #define fc_enum_name_match(title, table_type, table) \ | |
98 | static int get_fc_##title##_match(const char *table_key, \ | |
99 | enum table_type *value) \ | |
100 | { \ | |
101 | int i; \ | |
102 | \ | |
6391a113 | 103 | for (i = 0; i < ARRAY_SIZE(table); i++) { \ |
1da177e4 LT |
104 | if (strncmp(table_key, table[i].name, \ |
105 | table[i].matchlen) == 0) { \ | |
106 | *value = table[i].value; \ | |
107 | return 0; /* success */ \ | |
108 | } \ | |
109 | } \ | |
110 | return 1; /* failure */ \ | |
111 | } | |
112 | ||
113 | ||
114 | /* Convert fc_port_type values to ascii string name */ | |
115 | static struct { | |
116 | enum fc_port_type value; | |
117 | char *name; | |
118 | } fc_port_type_names[] = { | |
119 | { FC_PORTTYPE_UNKNOWN, "Unknown" }, | |
120 | { FC_PORTTYPE_OTHER, "Other" }, | |
121 | { FC_PORTTYPE_NOTPRESENT, "Not Present" }, | |
122 | { FC_PORTTYPE_NPORT, "NPort (fabric via point-to-point)" }, | |
123 | { FC_PORTTYPE_NLPORT, "NLPort (fabric via loop)" }, | |
124 | { FC_PORTTYPE_LPORT, "LPort (private loop)" }, | |
951948a3 | 125 | { FC_PORTTYPE_PTP, "Point-To-Point (direct nport connection)" }, |
a53eb5e0 | 126 | { FC_PORTTYPE_NPIV, "NPIV VPORT" }, |
1da177e4 LT |
127 | }; |
128 | fc_enum_name_search(port_type, fc_port_type, fc_port_type_names) | |
129 | #define FC_PORTTYPE_MAX_NAMELEN 50 | |
130 | ||
a53eb5e0 JS |
131 | /* Reuse fc_port_type enum function for vport_type */ |
132 | #define get_fc_vport_type_name get_fc_port_type_name | |
133 | ||
1da177e4 | 134 | |
84314fd4 JS |
135 | /* Convert fc_host_event_code values to ascii string name */ |
136 | static const struct { | |
137 | enum fc_host_event_code value; | |
138 | char *name; | |
139 | } fc_host_event_code_names[] = { | |
140 | { FCH_EVT_LIP, "lip" }, | |
141 | { FCH_EVT_LINKUP, "link_up" }, | |
142 | { FCH_EVT_LINKDOWN, "link_down" }, | |
143 | { FCH_EVT_LIPRESET, "lip_reset" }, | |
144 | { FCH_EVT_RSCN, "rscn" }, | |
145 | { FCH_EVT_ADAPTER_CHANGE, "adapter_chg" }, | |
146 | { FCH_EVT_PORT_UNKNOWN, "port_unknown" }, | |
147 | { FCH_EVT_PORT_ONLINE, "port_online" }, | |
148 | { FCH_EVT_PORT_OFFLINE, "port_offline" }, | |
149 | { FCH_EVT_PORT_FABRIC, "port_fabric" }, | |
150 | { FCH_EVT_LINK_UNKNOWN, "link_unknown" }, | |
151 | { FCH_EVT_VENDOR_UNIQUE, "vendor_unique" }, | |
152 | }; | |
153 | fc_enum_name_search(host_event_code, fc_host_event_code, | |
154 | fc_host_event_code_names) | |
155 | #define FC_HOST_EVENT_CODE_MAX_NAMELEN 30 | |
156 | ||
157 | ||
1da177e4 LT |
158 | /* Convert fc_port_state values to ascii string name */ |
159 | static struct { | |
160 | enum fc_port_state value; | |
161 | char *name; | |
162 | } fc_port_state_names[] = { | |
163 | { FC_PORTSTATE_UNKNOWN, "Unknown" }, | |
164 | { FC_PORTSTATE_NOTPRESENT, "Not Present" }, | |
165 | { FC_PORTSTATE_ONLINE, "Online" }, | |
166 | { FC_PORTSTATE_OFFLINE, "Offline" }, | |
167 | { FC_PORTSTATE_BLOCKED, "Blocked" }, | |
168 | { FC_PORTSTATE_BYPASSED, "Bypassed" }, | |
169 | { FC_PORTSTATE_DIAGNOSTICS, "Diagnostics" }, | |
170 | { FC_PORTSTATE_LINKDOWN, "Linkdown" }, | |
171 | { FC_PORTSTATE_ERROR, "Error" }, | |
172 | { FC_PORTSTATE_LOOPBACK, "Loopback" }, | |
42e33148 | 173 | { FC_PORTSTATE_DELETED, "Deleted" }, |
1da177e4 LT |
174 | }; |
175 | fc_enum_name_search(port_state, fc_port_state, fc_port_state_names) | |
176 | #define FC_PORTSTATE_MAX_NAMELEN 20 | |
177 | ||
178 | ||
a53eb5e0 JS |
179 | /* Convert fc_vport_state values to ascii string name */ |
180 | static struct { | |
181 | enum fc_vport_state value; | |
182 | char *name; | |
183 | } fc_vport_state_names[] = { | |
184 | { FC_VPORT_UNKNOWN, "Unknown" }, | |
185 | { FC_VPORT_ACTIVE, "Active" }, | |
186 | { FC_VPORT_DISABLED, "Disabled" }, | |
187 | { FC_VPORT_LINKDOWN, "Linkdown" }, | |
188 | { FC_VPORT_INITIALIZING, "Initializing" }, | |
189 | { FC_VPORT_NO_FABRIC_SUPP, "No Fabric Support" }, | |
190 | { FC_VPORT_NO_FABRIC_RSCS, "No Fabric Resources" }, | |
191 | { FC_VPORT_FABRIC_LOGOUT, "Fabric Logout" }, | |
192 | { FC_VPORT_FABRIC_REJ_WWN, "Fabric Rejected WWN" }, | |
193 | { FC_VPORT_FAILED, "VPort Failed" }, | |
194 | }; | |
195 | fc_enum_name_search(vport_state, fc_vport_state, fc_vport_state_names) | |
196 | #define FC_VPORTSTATE_MAX_NAMELEN 24 | |
197 | ||
198 | /* Reuse fc_vport_state enum function for vport_last_state */ | |
199 | #define get_fc_vport_last_state_name get_fc_vport_state_name | |
200 | ||
201 | ||
1da177e4 | 202 | /* Convert fc_tgtid_binding_type values to ascii string name */ |
0ad78200 | 203 | static const struct { |
1da177e4 LT |
204 | enum fc_tgtid_binding_type value; |
205 | char *name; | |
206 | int matchlen; | |
207 | } fc_tgtid_binding_type_names[] = { | |
208 | { FC_TGTID_BIND_NONE, "none", 4 }, | |
209 | { FC_TGTID_BIND_BY_WWPN, "wwpn (World Wide Port Name)", 4 }, | |
210 | { FC_TGTID_BIND_BY_WWNN, "wwnn (World Wide Node Name)", 4 }, | |
211 | { FC_TGTID_BIND_BY_ID, "port_id (FC Address)", 7 }, | |
212 | }; | |
213 | fc_enum_name_search(tgtid_bind_type, fc_tgtid_binding_type, | |
214 | fc_tgtid_binding_type_names) | |
215 | fc_enum_name_match(tgtid_bind_type, fc_tgtid_binding_type, | |
216 | fc_tgtid_binding_type_names) | |
217 | #define FC_BINDTYPE_MAX_NAMELEN 30 | |
218 | ||
219 | ||
220 | #define fc_bitfield_name_search(title, table) \ | |
221 | static ssize_t \ | |
222 | get_fc_##title##_names(u32 table_key, char *buf) \ | |
223 | { \ | |
224 | char *prefix = ""; \ | |
225 | ssize_t len = 0; \ | |
226 | int i; \ | |
227 | \ | |
6391a113 | 228 | for (i = 0; i < ARRAY_SIZE(table); i++) { \ |
1da177e4 LT |
229 | if (table[i].value & table_key) { \ |
230 | len += sprintf(buf + len, "%s%s", \ | |
231 | prefix, table[i].name); \ | |
232 | prefix = ", "; \ | |
233 | } \ | |
234 | } \ | |
235 | len += sprintf(buf + len, "\n"); \ | |
236 | return len; \ | |
237 | } | |
238 | ||
239 | ||
240 | /* Convert FC_COS bit values to ascii string name */ | |
0ad78200 | 241 | static const struct { |
1da177e4 LT |
242 | u32 value; |
243 | char *name; | |
244 | } fc_cos_names[] = { | |
245 | { FC_COS_CLASS1, "Class 1" }, | |
246 | { FC_COS_CLASS2, "Class 2" }, | |
247 | { FC_COS_CLASS3, "Class 3" }, | |
248 | { FC_COS_CLASS4, "Class 4" }, | |
249 | { FC_COS_CLASS6, "Class 6" }, | |
250 | }; | |
251 | fc_bitfield_name_search(cos, fc_cos_names) | |
252 | ||
253 | ||
254 | /* Convert FC_PORTSPEED bit values to ascii string name */ | |
0ad78200 | 255 | static const struct { |
1da177e4 LT |
256 | u32 value; |
257 | char *name; | |
258 | } fc_port_speed_names[] = { | |
259 | { FC_PORTSPEED_1GBIT, "1 Gbit" }, | |
260 | { FC_PORTSPEED_2GBIT, "2 Gbit" }, | |
261 | { FC_PORTSPEED_4GBIT, "4 Gbit" }, | |
262 | { FC_PORTSPEED_10GBIT, "10 Gbit" }, | |
c3d2350a JS |
263 | { FC_PORTSPEED_8GBIT, "8 Gbit" }, |
264 | { FC_PORTSPEED_16GBIT, "16 Gbit" }, | |
1da177e4 LT |
265 | { FC_PORTSPEED_NOT_NEGOTIATED, "Not Negotiated" }, |
266 | }; | |
267 | fc_bitfield_name_search(port_speed, fc_port_speed_names) | |
268 | ||
269 | ||
270 | static int | |
271 | show_fc_fc4s (char *buf, u8 *fc4_list) | |
272 | { | |
273 | int i, len=0; | |
274 | ||
275 | for (i = 0; i < FC_FC4_LIST_SIZE; i++, fc4_list++) | |
276 | len += sprintf(buf + len , "0x%02x ", *fc4_list); | |
277 | len += sprintf(buf + len, "\n"); | |
278 | return len; | |
279 | } | |
280 | ||
281 | ||
a53eb5e0 | 282 | /* Convert FC_PORT_ROLE bit values to ascii string name */ |
0ad78200 | 283 | static const struct { |
1da177e4 LT |
284 | u32 value; |
285 | char *name; | |
a53eb5e0 JS |
286 | } fc_port_role_names[] = { |
287 | { FC_PORT_ROLE_FCP_TARGET, "FCP Target" }, | |
288 | { FC_PORT_ROLE_FCP_INITIATOR, "FCP Initiator" }, | |
289 | { FC_PORT_ROLE_IP_PORT, "IP Port" }, | |
1da177e4 | 290 | }; |
a53eb5e0 | 291 | fc_bitfield_name_search(port_roles, fc_port_role_names) |
1da177e4 LT |
292 | |
293 | /* | |
294 | * Define roles that are specific to port_id. Values are relative to ROLE_MASK. | |
295 | */ | |
296 | #define FC_WELLKNOWN_PORTID_MASK 0xfffff0 | |
297 | #define FC_WELLKNOWN_ROLE_MASK 0x00000f | |
298 | #define FC_FPORT_PORTID 0x00000e | |
299 | #define FC_FABCTLR_PORTID 0x00000d | |
300 | #define FC_DIRSRVR_PORTID 0x00000c | |
301 | #define FC_TIMESRVR_PORTID 0x00000b | |
302 | #define FC_MGMTSRVR_PORTID 0x00000a | |
303 | ||
304 | ||
c4028958 DH |
305 | static void fc_timeout_deleted_rport(struct work_struct *work); |
306 | static void fc_timeout_fail_rport_io(struct work_struct *work); | |
307 | static void fc_scsi_scan_rport(struct work_struct *work); | |
1da177e4 LT |
308 | |
309 | /* | |
310 | * Attribute counts pre object type... | |
311 | * Increase these values if you add attributes | |
312 | */ | |
313 | #define FC_STARGET_NUM_ATTRS 3 | |
0f29b966 | 314 | #define FC_RPORT_NUM_ATTRS 10 |
a53eb5e0 | 315 | #define FC_VPORT_NUM_ATTRS 9 |
bb8ef587 | 316 | #define FC_HOST_NUM_ATTRS 29 |
1da177e4 LT |
317 | |
318 | struct fc_internal { | |
319 | struct scsi_transport_template t; | |
320 | struct fc_function_template *f; | |
321 | ||
322 | /* | |
323 | * For attributes : each object has : | |
324 | * An array of the actual attributes structures | |
325 | * An array of null-terminated pointers to the attribute | |
326 | * structures - used for mid-layer interaction. | |
327 | * | |
328 | * The attribute containers for the starget and host are are | |
329 | * part of the midlayer. As the remote port is specific to the | |
330 | * fc transport, we must provide the attribute container. | |
331 | */ | |
ee959b00 | 332 | struct device_attribute private_starget_attrs[ |
1da177e4 | 333 | FC_STARGET_NUM_ATTRS]; |
ee959b00 | 334 | struct device_attribute *starget_attrs[FC_STARGET_NUM_ATTRS + 1]; |
1da177e4 | 335 | |
ee959b00 TJ |
336 | struct device_attribute private_host_attrs[FC_HOST_NUM_ATTRS]; |
337 | struct device_attribute *host_attrs[FC_HOST_NUM_ATTRS + 1]; | |
1da177e4 LT |
338 | |
339 | struct transport_container rport_attr_cont; | |
ee959b00 TJ |
340 | struct device_attribute private_rport_attrs[FC_RPORT_NUM_ATTRS]; |
341 | struct device_attribute *rport_attrs[FC_RPORT_NUM_ATTRS + 1]; | |
a53eb5e0 JS |
342 | |
343 | struct transport_container vport_attr_cont; | |
ee959b00 TJ |
344 | struct device_attribute private_vport_attrs[FC_VPORT_NUM_ATTRS]; |
345 | struct device_attribute *vport_attrs[FC_VPORT_NUM_ATTRS + 1]; | |
1da177e4 LT |
346 | }; |
347 | ||
348 | #define to_fc_internal(tmpl) container_of(tmpl, struct fc_internal, t) | |
349 | ||
d0a7e574 | 350 | static int fc_target_setup(struct transport_container *tc, struct device *dev, |
ee959b00 | 351 | struct device *cdev) |
1da177e4 LT |
352 | { |
353 | struct scsi_target *starget = to_scsi_target(dev); | |
354 | struct fc_rport *rport = starget_to_rport(starget); | |
355 | ||
356 | /* | |
357 | * if parent is remote port, use values from remote port. | |
358 | * Otherwise, this host uses the fc_transport, but not the | |
359 | * remote port interface. As such, initialize to known non-values. | |
360 | */ | |
361 | if (rport) { | |
362 | fc_starget_node_name(starget) = rport->node_name; | |
363 | fc_starget_port_name(starget) = rport->port_name; | |
364 | fc_starget_port_id(starget) = rport->port_id; | |
365 | } else { | |
366 | fc_starget_node_name(starget) = -1; | |
367 | fc_starget_port_name(starget) = -1; | |
368 | fc_starget_port_id(starget) = -1; | |
369 | } | |
370 | ||
371 | return 0; | |
372 | } | |
373 | ||
374 | static DECLARE_TRANSPORT_CLASS(fc_transport_class, | |
375 | "fc_transport", | |
376 | fc_target_setup, | |
377 | NULL, | |
378 | NULL); | |
379 | ||
d0a7e574 | 380 | static int fc_host_setup(struct transport_container *tc, struct device *dev, |
ee959b00 | 381 | struct device *cdev) |
1da177e4 LT |
382 | { |
383 | struct Scsi_Host *shost = dev_to_shost(dev); | |
aedf3497 | 384 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
1da177e4 | 385 | |
9ef3e4a4 | 386 | /* |
1da177e4 LT |
387 | * Set default values easily detected by the midlayer as |
388 | * failure cases. The scsi lldd is responsible for initializing | |
389 | * all transport attributes to valid values per host. | |
390 | */ | |
aedf3497 JS |
391 | fc_host->node_name = -1; |
392 | fc_host->port_name = -1; | |
393 | fc_host->permanent_port_name = -1; | |
394 | fc_host->supported_classes = FC_COS_UNSPECIFIED; | |
395 | memset(fc_host->supported_fc4s, 0, | |
396 | sizeof(fc_host->supported_fc4s)); | |
aedf3497 JS |
397 | fc_host->supported_speeds = FC_PORTSPEED_UNKNOWN; |
398 | fc_host->maxframe_size = -1; | |
a53eb5e0 | 399 | fc_host->max_npiv_vports = 0; |
aedf3497 JS |
400 | memset(fc_host->serial_number, 0, |
401 | sizeof(fc_host->serial_number)); | |
bb8ef587 NP |
402 | memset(fc_host->manufacturer, 0, |
403 | sizeof(fc_host->manufacturer)); | |
404 | memset(fc_host->model, 0, | |
405 | sizeof(fc_host->model)); | |
406 | memset(fc_host->model_description, 0, | |
407 | sizeof(fc_host->model_description)); | |
408 | memset(fc_host->hardware_version, 0, | |
409 | sizeof(fc_host->hardware_version)); | |
410 | memset(fc_host->driver_version, 0, | |
411 | sizeof(fc_host->driver_version)); | |
412 | memset(fc_host->firmware_version, 0, | |
413 | sizeof(fc_host->firmware_version)); | |
414 | memset(fc_host->optionrom_version, 0, | |
415 | sizeof(fc_host->optionrom_version)); | |
aedf3497 JS |
416 | |
417 | fc_host->port_id = -1; | |
418 | fc_host->port_type = FC_PORTTYPE_UNKNOWN; | |
419 | fc_host->port_state = FC_PORTSTATE_UNKNOWN; | |
420 | memset(fc_host->active_fc4s, 0, | |
421 | sizeof(fc_host->active_fc4s)); | |
422 | fc_host->speed = FC_PORTSPEED_UNKNOWN; | |
423 | fc_host->fabric_name = -1; | |
b8d08210 JS |
424 | memset(fc_host->symbolic_name, 0, sizeof(fc_host->symbolic_name)); |
425 | memset(fc_host->system_hostname, 0, sizeof(fc_host->system_hostname)); | |
aedf3497 JS |
426 | |
427 | fc_host->tgtid_bind_type = FC_TGTID_BIND_BY_WWPN; | |
428 | ||
429 | INIT_LIST_HEAD(&fc_host->rports); | |
430 | INIT_LIST_HEAD(&fc_host->rport_bindings); | |
a53eb5e0 | 431 | INIT_LIST_HEAD(&fc_host->vports); |
aedf3497 JS |
432 | fc_host->next_rport_number = 0; |
433 | fc_host->next_target_id = 0; | |
a53eb5e0 JS |
434 | fc_host->next_vport_number = 0; |
435 | fc_host->npiv_vports_inuse = 0; | |
aedf3497 | 436 | |
aab0de24 KS |
437 | snprintf(fc_host->work_q_name, sizeof(fc_host->work_q_name), |
438 | "fc_wq_%d", shost->host_no); | |
112f661d | 439 | fc_host->work_q = alloc_workqueue(fc_host->work_q_name, 0, 0); |
aedf3497 JS |
440 | if (!fc_host->work_q) |
441 | return -ENOMEM; | |
442 | ||
43ca910a | 443 | fc_host->dev_loss_tmo = fc_dev_loss_tmo; |
aab0de24 KS |
444 | snprintf(fc_host->devloss_work_q_name, |
445 | sizeof(fc_host->devloss_work_q_name), | |
446 | "fc_dl_%d", shost->host_no); | |
112f661d NNS |
447 | fc_host->devloss_work_q = |
448 | alloc_workqueue(fc_host->devloss_work_q_name, 0, 0); | |
aedf3497 JS |
449 | if (!fc_host->devloss_work_q) { |
450 | destroy_workqueue(fc_host->work_q); | |
451 | fc_host->work_q = NULL; | |
452 | return -ENOMEM; | |
453 | } | |
454 | ||
9e4f5e29 JS |
455 | fc_bsg_hostadd(shost, fc_host); |
456 | /* ignore any bsg add error - we just can't do sgio */ | |
457 | ||
458 | return 0; | |
459 | } | |
460 | ||
461 | static int fc_host_remove(struct transport_container *tc, struct device *dev, | |
462 | struct device *cdev) | |
463 | { | |
464 | struct Scsi_Host *shost = dev_to_shost(dev); | |
465 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); | |
466 | ||
467 | fc_bsg_remove(fc_host->rqst_q); | |
1da177e4 LT |
468 | return 0; |
469 | } | |
470 | ||
471 | static DECLARE_TRANSPORT_CLASS(fc_host_class, | |
472 | "fc_host", | |
473 | fc_host_setup, | |
9e4f5e29 | 474 | fc_host_remove, |
1da177e4 LT |
475 | NULL); |
476 | ||
477 | /* | |
478 | * Setup and Remove actions for remote ports are handled | |
479 | * in the service functions below. | |
480 | */ | |
481 | static DECLARE_TRANSPORT_CLASS(fc_rport_class, | |
482 | "fc_remote_ports", | |
483 | NULL, | |
484 | NULL, | |
485 | NULL); | |
486 | ||
a53eb5e0 JS |
487 | /* |
488 | * Setup and Remove actions for virtual ports are handled | |
489 | * in the service functions below. | |
490 | */ | |
491 | static DECLARE_TRANSPORT_CLASS(fc_vport_class, | |
492 | "fc_vports", | |
493 | NULL, | |
494 | NULL, | |
495 | NULL); | |
496 | ||
eb44820c | 497 | /* |
84314fd4 | 498 | * Netlink Infrastructure |
eb44820c | 499 | */ |
84314fd4 JS |
500 | |
501 | static atomic_t fc_event_seq; | |
502 | ||
503 | /** | |
504 | * fc_get_event_number - Obtain the next sequential FC event number | |
505 | * | |
506 | * Notes: | |
eb44820c | 507 | * We could have inlined this, but it would have required fc_event_seq to |
84314fd4 JS |
508 | * be exposed. For now, live with the subroutine call. |
509 | * Atomic used to avoid lock/unlock... | |
eb44820c | 510 | */ |
84314fd4 JS |
511 | u32 |
512 | fc_get_event_number(void) | |
513 | { | |
514 | return atomic_add_return(1, &fc_event_seq); | |
515 | } | |
516 | EXPORT_SYMBOL(fc_get_event_number); | |
517 | ||
518 | ||
519 | /** | |
520 | * fc_host_post_event - called to post an even on an fc_host. | |
84314fd4 JS |
521 | * @shost: host the event occurred on |
522 | * @event_number: fc event number obtained from get_fc_event_number() | |
523 | * @event_code: fc_host event being posted | |
524 | * @event_data: 32bits of data for the event being posted | |
525 | * | |
526 | * Notes: | |
527 | * This routine assumes no locks are held on entry. | |
eb44820c | 528 | */ |
84314fd4 JS |
529 | void |
530 | fc_host_post_event(struct Scsi_Host *shost, u32 event_number, | |
531 | enum fc_host_event_code event_code, u32 event_data) | |
532 | { | |
533 | struct sk_buff *skb; | |
534 | struct nlmsghdr *nlh; | |
535 | struct fc_nl_event *event; | |
536 | const char *name; | |
537 | u32 len, skblen; | |
538 | int err; | |
539 | ||
540 | if (!scsi_nl_sock) { | |
541 | err = -ENOENT; | |
542 | goto send_fail; | |
543 | } | |
544 | ||
545 | len = FC_NL_MSGALIGN(sizeof(*event)); | |
546 | skblen = NLMSG_SPACE(len); | |
547 | ||
548 | skb = alloc_skb(skblen, GFP_KERNEL); | |
549 | if (!skb) { | |
550 | err = -ENOBUFS; | |
551 | goto send_fail; | |
552 | } | |
553 | ||
554 | nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, | |
555 | skblen - sizeof(*nlh), 0); | |
556 | if (!nlh) { | |
557 | err = -ENOBUFS; | |
558 | goto send_fail_skb; | |
559 | } | |
560 | event = NLMSG_DATA(nlh); | |
561 | ||
562 | INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC, | |
563 | FC_NL_ASYNC_EVENT, len); | |
564 | event->seconds = get_seconds(); | |
565 | event->vendor_id = 0; | |
566 | event->host_no = shost->host_no; | |
567 | event->event_datalen = sizeof(u32); /* bytes */ | |
568 | event->event_num = event_number; | |
569 | event->event_code = event_code; | |
570 | event->event_data = event_data; | |
571 | ||
ff491a73 PNA |
572 | nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS, |
573 | GFP_KERNEL); | |
84314fd4 JS |
574 | return; |
575 | ||
576 | send_fail_skb: | |
577 | kfree_skb(skb); | |
578 | send_fail: | |
579 | name = get_fc_host_event_code_name(event_code); | |
580 | printk(KERN_WARNING | |
581 | "%s: Dropped Event : host %d %s data 0x%08x - err %d\n", | |
cadbd4a5 | 582 | __func__, shost->host_no, |
84314fd4 JS |
583 | (name) ? name : "<unknown>", event_data, err); |
584 | return; | |
585 | } | |
586 | EXPORT_SYMBOL(fc_host_post_event); | |
587 | ||
588 | ||
589 | /** | |
eb44820c | 590 | * fc_host_post_vendor_event - called to post a vendor unique event on an fc_host |
84314fd4 JS |
591 | * @shost: host the event occurred on |
592 | * @event_number: fc event number obtained from get_fc_event_number() | |
593 | * @data_len: amount, in bytes, of vendor unique data | |
594 | * @data_buf: pointer to vendor unique data | |
eb44820c | 595 | * @vendor_id: Vendor id |
84314fd4 JS |
596 | * |
597 | * Notes: | |
598 | * This routine assumes no locks are held on entry. | |
eb44820c | 599 | */ |
84314fd4 JS |
600 | void |
601 | fc_host_post_vendor_event(struct Scsi_Host *shost, u32 event_number, | |
f14e2e29 | 602 | u32 data_len, char * data_buf, u64 vendor_id) |
84314fd4 JS |
603 | { |
604 | struct sk_buff *skb; | |
605 | struct nlmsghdr *nlh; | |
606 | struct fc_nl_event *event; | |
607 | u32 len, skblen; | |
608 | int err; | |
609 | ||
610 | if (!scsi_nl_sock) { | |
611 | err = -ENOENT; | |
612 | goto send_vendor_fail; | |
613 | } | |
614 | ||
615 | len = FC_NL_MSGALIGN(sizeof(*event) + data_len); | |
616 | skblen = NLMSG_SPACE(len); | |
617 | ||
618 | skb = alloc_skb(skblen, GFP_KERNEL); | |
619 | if (!skb) { | |
620 | err = -ENOBUFS; | |
621 | goto send_vendor_fail; | |
622 | } | |
623 | ||
624 | nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, | |
625 | skblen - sizeof(*nlh), 0); | |
626 | if (!nlh) { | |
627 | err = -ENOBUFS; | |
628 | goto send_vendor_fail_skb; | |
629 | } | |
630 | event = NLMSG_DATA(nlh); | |
631 | ||
632 | INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC, | |
633 | FC_NL_ASYNC_EVENT, len); | |
634 | event->seconds = get_seconds(); | |
635 | event->vendor_id = vendor_id; | |
636 | event->host_no = shost->host_no; | |
637 | event->event_datalen = data_len; /* bytes */ | |
638 | event->event_num = event_number; | |
639 | event->event_code = FCH_EVT_VENDOR_UNIQUE; | |
640 | memcpy(&event->event_data, data_buf, data_len); | |
641 | ||
ff491a73 PNA |
642 | nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS, |
643 | GFP_KERNEL); | |
84314fd4 JS |
644 | return; |
645 | ||
646 | send_vendor_fail_skb: | |
647 | kfree_skb(skb); | |
648 | send_vendor_fail: | |
649 | printk(KERN_WARNING | |
650 | "%s: Dropped Event : host %d vendor_unique - err %d\n", | |
cadbd4a5 | 651 | __func__, shost->host_no, err); |
84314fd4 JS |
652 | return; |
653 | } | |
654 | EXPORT_SYMBOL(fc_host_post_vendor_event); | |
655 | ||
656 | ||
1da177e4 LT |
657 | |
658 | static __init int fc_transport_init(void) | |
659 | { | |
84314fd4 JS |
660 | int error; |
661 | ||
662 | atomic_set(&fc_event_seq, 0); | |
663 | ||
664 | error = transport_class_register(&fc_host_class); | |
a53eb5e0 JS |
665 | if (error) |
666 | return error; | |
667 | error = transport_class_register(&fc_vport_class); | |
1da177e4 | 668 | if (error) |
48de68a4 | 669 | goto unreg_host_class; |
1da177e4 LT |
670 | error = transport_class_register(&fc_rport_class); |
671 | if (error) | |
48de68a4 MC |
672 | goto unreg_vport_class; |
673 | error = transport_class_register(&fc_transport_class); | |
674 | if (error) | |
675 | goto unreg_rport_class; | |
676 | return 0; | |
677 | ||
678 | unreg_rport_class: | |
679 | transport_class_unregister(&fc_rport_class); | |
680 | unreg_vport_class: | |
681 | transport_class_unregister(&fc_vport_class); | |
682 | unreg_host_class: | |
683 | transport_class_unregister(&fc_host_class); | |
684 | return error; | |
1da177e4 LT |
685 | } |
686 | ||
687 | static void __exit fc_transport_exit(void) | |
688 | { | |
689 | transport_class_unregister(&fc_transport_class); | |
690 | transport_class_unregister(&fc_rport_class); | |
691 | transport_class_unregister(&fc_host_class); | |
a53eb5e0 | 692 | transport_class_unregister(&fc_vport_class); |
1da177e4 LT |
693 | } |
694 | ||
695 | /* | |
696 | * FC Remote Port Attribute Management | |
697 | */ | |
698 | ||
699 | #define fc_rport_show_function(field, format_string, sz, cast) \ | |
700 | static ssize_t \ | |
ee959b00 TJ |
701 | show_fc_rport_##field (struct device *dev, \ |
702 | struct device_attribute *attr, char *buf) \ | |
1da177e4 | 703 | { \ |
ee959b00 | 704 | struct fc_rport *rport = transport_class_to_rport(dev); \ |
1da177e4 LT |
705 | struct Scsi_Host *shost = rport_to_shost(rport); \ |
706 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
19a7b4ae JSEC |
707 | if ((i->f->get_rport_##field) && \ |
708 | !((rport->port_state == FC_PORTSTATE_BLOCKED) || \ | |
42e33148 | 709 | (rport->port_state == FC_PORTSTATE_DELETED) || \ |
19a7b4ae | 710 | (rport->port_state == FC_PORTSTATE_NOTPRESENT))) \ |
1da177e4 LT |
711 | i->f->get_rport_##field(rport); \ |
712 | return snprintf(buf, sz, format_string, cast rport->field); \ | |
713 | } | |
714 | ||
715 | #define fc_rport_store_function(field) \ | |
716 | static ssize_t \ | |
ee959b00 TJ |
717 | store_fc_rport_##field(struct device *dev, \ |
718 | struct device_attribute *attr, \ | |
719 | const char *buf, size_t count) \ | |
1da177e4 LT |
720 | { \ |
721 | int val; \ | |
ee959b00 | 722 | struct fc_rport *rport = transport_class_to_rport(dev); \ |
1da177e4 LT |
723 | struct Scsi_Host *shost = rport_to_shost(rport); \ |
724 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
0f29b966 | 725 | char *cp; \ |
19a7b4ae | 726 | if ((rport->port_state == FC_PORTSTATE_BLOCKED) || \ |
42e33148 | 727 | (rport->port_state == FC_PORTSTATE_DELETED) || \ |
19a7b4ae JSEC |
728 | (rport->port_state == FC_PORTSTATE_NOTPRESENT)) \ |
729 | return -EBUSY; \ | |
0f29b966 JS |
730 | val = simple_strtoul(buf, &cp, 0); \ |
731 | if (*cp && (*cp != '\n')) \ | |
732 | return -EINVAL; \ | |
1da177e4 LT |
733 | i->f->set_rport_##field(rport, val); \ |
734 | return count; \ | |
735 | } | |
736 | ||
737 | #define fc_rport_rd_attr(field, format_string, sz) \ | |
738 | fc_rport_show_function(field, format_string, sz, ) \ | |
ee959b00 | 739 | static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ |
1da177e4 LT |
740 | show_fc_rport_##field, NULL) |
741 | ||
742 | #define fc_rport_rd_attr_cast(field, format_string, sz, cast) \ | |
743 | fc_rport_show_function(field, format_string, sz, (cast)) \ | |
ee959b00 | 744 | static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ |
1da177e4 LT |
745 | show_fc_rport_##field, NULL) |
746 | ||
747 | #define fc_rport_rw_attr(field, format_string, sz) \ | |
748 | fc_rport_show_function(field, format_string, sz, ) \ | |
749 | fc_rport_store_function(field) \ | |
ee959b00 | 750 | static FC_DEVICE_ATTR(rport, field, S_IRUGO | S_IWUSR, \ |
1da177e4 LT |
751 | show_fc_rport_##field, \ |
752 | store_fc_rport_##field) | |
753 | ||
754 | ||
755 | #define fc_private_rport_show_function(field, format_string, sz, cast) \ | |
756 | static ssize_t \ | |
ee959b00 TJ |
757 | show_fc_rport_##field (struct device *dev, \ |
758 | struct device_attribute *attr, char *buf) \ | |
1da177e4 | 759 | { \ |
ee959b00 | 760 | struct fc_rport *rport = transport_class_to_rport(dev); \ |
1da177e4 LT |
761 | return snprintf(buf, sz, format_string, cast rport->field); \ |
762 | } | |
763 | ||
764 | #define fc_private_rport_rd_attr(field, format_string, sz) \ | |
765 | fc_private_rport_show_function(field, format_string, sz, ) \ | |
ee959b00 | 766 | static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ |
1da177e4 LT |
767 | show_fc_rport_##field, NULL) |
768 | ||
769 | #define fc_private_rport_rd_attr_cast(field, format_string, sz, cast) \ | |
770 | fc_private_rport_show_function(field, format_string, sz, (cast)) \ | |
ee959b00 | 771 | static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ |
1da177e4 LT |
772 | show_fc_rport_##field, NULL) |
773 | ||
774 | ||
775 | #define fc_private_rport_rd_enum_attr(title, maxlen) \ | |
776 | static ssize_t \ | |
ee959b00 TJ |
777 | show_fc_rport_##title (struct device *dev, \ |
778 | struct device_attribute *attr, char *buf) \ | |
1da177e4 | 779 | { \ |
ee959b00 | 780 | struct fc_rport *rport = transport_class_to_rport(dev); \ |
1da177e4 LT |
781 | const char *name; \ |
782 | name = get_fc_##title##_name(rport->title); \ | |
783 | if (!name) \ | |
784 | return -EINVAL; \ | |
785 | return snprintf(buf, maxlen, "%s\n", name); \ | |
786 | } \ | |
ee959b00 | 787 | static FC_DEVICE_ATTR(rport, title, S_IRUGO, \ |
1da177e4 LT |
788 | show_fc_rport_##title, NULL) |
789 | ||
790 | ||
791 | #define SETUP_RPORT_ATTRIBUTE_RD(field) \ | |
ee959b00 | 792 | i->private_rport_attrs[count] = device_attr_rport_##field; \ |
1da177e4 LT |
793 | i->private_rport_attrs[count].attr.mode = S_IRUGO; \ |
794 | i->private_rport_attrs[count].store = NULL; \ | |
795 | i->rport_attrs[count] = &i->private_rport_attrs[count]; \ | |
796 | if (i->f->show_rport_##field) \ | |
797 | count++ | |
798 | ||
799 | #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(field) \ | |
ee959b00 | 800 | i->private_rport_attrs[count] = device_attr_rport_##field; \ |
1da177e4 LT |
801 | i->private_rport_attrs[count].attr.mode = S_IRUGO; \ |
802 | i->private_rport_attrs[count].store = NULL; \ | |
803 | i->rport_attrs[count] = &i->private_rport_attrs[count]; \ | |
804 | count++ | |
805 | ||
806 | #define SETUP_RPORT_ATTRIBUTE_RW(field) \ | |
ee959b00 | 807 | i->private_rport_attrs[count] = device_attr_rport_##field; \ |
1da177e4 LT |
808 | if (!i->f->set_rport_##field) { \ |
809 | i->private_rport_attrs[count].attr.mode = S_IRUGO; \ | |
810 | i->private_rport_attrs[count].store = NULL; \ | |
811 | } \ | |
812 | i->rport_attrs[count] = &i->private_rport_attrs[count]; \ | |
813 | if (i->f->show_rport_##field) \ | |
814 | count++ | |
815 | ||
0f29b966 JS |
816 | #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(field) \ |
817 | { \ | |
ee959b00 | 818 | i->private_rport_attrs[count] = device_attr_rport_##field; \ |
0f29b966 JS |
819 | i->rport_attrs[count] = &i->private_rport_attrs[count]; \ |
820 | count++; \ | |
821 | } | |
822 | ||
1da177e4 LT |
823 | |
824 | /* The FC Transport Remote Port Attributes: */ | |
825 | ||
826 | /* Fixed Remote Port Attributes */ | |
827 | ||
828 | fc_private_rport_rd_attr(maxframe_size, "%u bytes\n", 20); | |
829 | ||
830 | static ssize_t | |
ee959b00 TJ |
831 | show_fc_rport_supported_classes (struct device *dev, |
832 | struct device_attribute *attr, char *buf) | |
1da177e4 | 833 | { |
ee959b00 | 834 | struct fc_rport *rport = transport_class_to_rport(dev); |
1da177e4 LT |
835 | if (rport->supported_classes == FC_COS_UNSPECIFIED) |
836 | return snprintf(buf, 20, "unspecified\n"); | |
837 | return get_fc_cos_names(rport->supported_classes, buf); | |
838 | } | |
ee959b00 | 839 | static FC_DEVICE_ATTR(rport, supported_classes, S_IRUGO, |
1da177e4 LT |
840 | show_fc_rport_supported_classes, NULL); |
841 | ||
842 | /* Dynamic Remote Port Attributes */ | |
843 | ||
19a7b4ae JSEC |
844 | /* |
845 | * dev_loss_tmo attribute | |
846 | */ | |
43ca910a MC |
847 | static int fc_str_to_dev_loss(const char *buf, unsigned long *val) |
848 | { | |
849 | char *cp; | |
850 | ||
851 | *val = simple_strtoul(buf, &cp, 0); | |
852 | if ((*cp && (*cp != '\n')) || (*val < 0)) | |
853 | return -EINVAL; | |
854 | /* | |
855 | * Check for overflow; dev_loss_tmo is u32 | |
856 | */ | |
857 | if (*val > UINT_MAX) | |
858 | return -EINVAL; | |
859 | ||
860 | return 0; | |
861 | } | |
862 | ||
863 | static int fc_rport_set_dev_loss_tmo(struct fc_rport *rport, | |
864 | unsigned long val) | |
19a7b4ae | 865 | { |
19a7b4ae JSEC |
866 | struct Scsi_Host *shost = rport_to_shost(rport); |
867 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
43ca910a | 868 | |
19a7b4ae | 869 | if ((rport->port_state == FC_PORTSTATE_BLOCKED) || |
42e33148 | 870 | (rport->port_state == FC_PORTSTATE_DELETED) || |
19a7b4ae JSEC |
871 | (rport->port_state == FC_PORTSTATE_NOTPRESENT)) |
872 | return -EBUSY; | |
36dd288f HR |
873 | /* |
874 | * Check for overflow; dev_loss_tmo is u32 | |
875 | */ | |
876 | if (val > UINT_MAX) | |
877 | return -EINVAL; | |
878 | ||
f2818663 HR |
879 | /* |
880 | * If fast_io_fail is off we have to cap | |
881 | * dev_loss_tmo at SCSI_DEVICE_BLOCK_MAX_TIMEOUT | |
882 | */ | |
883 | if (rport->fast_io_fail_tmo == -1 && | |
884 | val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT) | |
885 | return -EINVAL; | |
886 | ||
19a7b4ae | 887 | i->f->set_rport_dev_loss_tmo(rport, val); |
43ca910a MC |
888 | return 0; |
889 | } | |
890 | ||
891 | fc_rport_show_function(dev_loss_tmo, "%d\n", 20, ) | |
892 | static ssize_t | |
893 | store_fc_rport_dev_loss_tmo(struct device *dev, struct device_attribute *attr, | |
894 | const char *buf, size_t count) | |
895 | { | |
896 | struct fc_rport *rport = transport_class_to_rport(dev); | |
897 | unsigned long val; | |
898 | int rc; | |
899 | ||
900 | rc = fc_str_to_dev_loss(buf, &val); | |
901 | if (rc) | |
902 | return rc; | |
903 | ||
904 | rc = fc_rport_set_dev_loss_tmo(rport, val); | |
905 | if (rc) | |
906 | return rc; | |
19a7b4ae JSEC |
907 | return count; |
908 | } | |
ee959b00 | 909 | static FC_DEVICE_ATTR(rport, dev_loss_tmo, S_IRUGO | S_IWUSR, |
19a7b4ae | 910 | show_fc_rport_dev_loss_tmo, store_fc_rport_dev_loss_tmo); |
1da177e4 LT |
911 | |
912 | ||
913 | /* Private Remote Port Attributes */ | |
914 | ||
915 | fc_private_rport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); | |
916 | fc_private_rport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); | |
917 | fc_private_rport_rd_attr(port_id, "0x%06x\n", 20); | |
918 | ||
919 | static ssize_t | |
ee959b00 TJ |
920 | show_fc_rport_roles (struct device *dev, struct device_attribute *attr, |
921 | char *buf) | |
1da177e4 | 922 | { |
ee959b00 | 923 | struct fc_rport *rport = transport_class_to_rport(dev); |
1da177e4 LT |
924 | |
925 | /* identify any roles that are port_id specific */ | |
926 | if ((rport->port_id != -1) && | |
927 | (rport->port_id & FC_WELLKNOWN_PORTID_MASK) == | |
928 | FC_WELLKNOWN_PORTID_MASK) { | |
929 | switch (rport->port_id & FC_WELLKNOWN_ROLE_MASK) { | |
930 | case FC_FPORT_PORTID: | |
931 | return snprintf(buf, 30, "Fabric Port\n"); | |
932 | case FC_FABCTLR_PORTID: | |
933 | return snprintf(buf, 30, "Fabric Controller\n"); | |
934 | case FC_DIRSRVR_PORTID: | |
935 | return snprintf(buf, 30, "Directory Server\n"); | |
936 | case FC_TIMESRVR_PORTID: | |
937 | return snprintf(buf, 30, "Time Server\n"); | |
938 | case FC_MGMTSRVR_PORTID: | |
939 | return snprintf(buf, 30, "Management Server\n"); | |
940 | default: | |
941 | return snprintf(buf, 30, "Unknown Fabric Entity\n"); | |
942 | } | |
943 | } else { | |
a53eb5e0 | 944 | if (rport->roles == FC_PORT_ROLE_UNKNOWN) |
1da177e4 | 945 | return snprintf(buf, 20, "unknown\n"); |
a53eb5e0 | 946 | return get_fc_port_roles_names(rport->roles, buf); |
1da177e4 LT |
947 | } |
948 | } | |
ee959b00 | 949 | static FC_DEVICE_ATTR(rport, roles, S_IRUGO, |
1da177e4 LT |
950 | show_fc_rport_roles, NULL); |
951 | ||
952 | fc_private_rport_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN); | |
953 | fc_private_rport_rd_attr(scsi_target_id, "%d\n", 20); | |
954 | ||
0f29b966 JS |
955 | /* |
956 | * fast_io_fail_tmo attribute | |
957 | */ | |
958 | static ssize_t | |
ee959b00 TJ |
959 | show_fc_rport_fast_io_fail_tmo (struct device *dev, |
960 | struct device_attribute *attr, char *buf) | |
0f29b966 | 961 | { |
ee959b00 | 962 | struct fc_rport *rport = transport_class_to_rport(dev); |
0f29b966 JS |
963 | |
964 | if (rport->fast_io_fail_tmo == -1) | |
965 | return snprintf(buf, 5, "off\n"); | |
966 | return snprintf(buf, 20, "%d\n", rport->fast_io_fail_tmo); | |
967 | } | |
968 | ||
969 | static ssize_t | |
ee959b00 TJ |
970 | store_fc_rport_fast_io_fail_tmo(struct device *dev, |
971 | struct device_attribute *attr, const char *buf, | |
972 | size_t count) | |
0f29b966 JS |
973 | { |
974 | int val; | |
975 | char *cp; | |
ee959b00 | 976 | struct fc_rport *rport = transport_class_to_rport(dev); |
0f29b966 JS |
977 | |
978 | if ((rport->port_state == FC_PORTSTATE_BLOCKED) || | |
979 | (rport->port_state == FC_PORTSTATE_DELETED) || | |
980 | (rport->port_state == FC_PORTSTATE_NOTPRESENT)) | |
981 | return -EBUSY; | |
982 | if (strncmp(buf, "off", 3) == 0) | |
983 | rport->fast_io_fail_tmo = -1; | |
984 | else { | |
985 | val = simple_strtoul(buf, &cp, 0); | |
f2818663 HR |
986 | if ((*cp && (*cp != '\n')) || (val < 0)) |
987 | return -EINVAL; | |
988 | /* | |
989 | * Cap fast_io_fail by dev_loss_tmo or | |
990 | * SCSI_DEVICE_BLOCK_MAX_TIMEOUT. | |
991 | */ | |
992 | if ((val >= rport->dev_loss_tmo) || | |
993 | (val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT)) | |
0f29b966 | 994 | return -EINVAL; |
f2818663 | 995 | |
0f29b966 JS |
996 | rport->fast_io_fail_tmo = val; |
997 | } | |
998 | return count; | |
999 | } | |
ee959b00 | 1000 | static FC_DEVICE_ATTR(rport, fast_io_fail_tmo, S_IRUGO | S_IWUSR, |
0f29b966 | 1001 | show_fc_rport_fast_io_fail_tmo, store_fc_rport_fast_io_fail_tmo); |
1da177e4 LT |
1002 | |
1003 | ||
1004 | /* | |
1005 | * FC SCSI Target Attribute Management | |
1006 | */ | |
1007 | ||
1008 | /* | |
1009 | * Note: in the target show function we recognize when the remote | |
732bee7a | 1010 | * port is in the hierarchy and do not allow the driver to get |
1da177e4 LT |
1011 | * involved in sysfs functions. The driver only gets involved if |
1012 | * it's the "old" style that doesn't use rports. | |
1013 | */ | |
1014 | #define fc_starget_show_function(field, format_string, sz, cast) \ | |
1015 | static ssize_t \ | |
ee959b00 TJ |
1016 | show_fc_starget_##field (struct device *dev, \ |
1017 | struct device_attribute *attr, char *buf) \ | |
1da177e4 | 1018 | { \ |
ee959b00 | 1019 | struct scsi_target *starget = transport_class_to_starget(dev); \ |
1da177e4 LT |
1020 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \ |
1021 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
1022 | struct fc_rport *rport = starget_to_rport(starget); \ | |
1023 | if (rport) \ | |
1024 | fc_starget_##field(starget) = rport->field; \ | |
1025 | else if (i->f->get_starget_##field) \ | |
1026 | i->f->get_starget_##field(starget); \ | |
1027 | return snprintf(buf, sz, format_string, \ | |
1028 | cast fc_starget_##field(starget)); \ | |
1029 | } | |
1030 | ||
1031 | #define fc_starget_rd_attr(field, format_string, sz) \ | |
1032 | fc_starget_show_function(field, format_string, sz, ) \ | |
ee959b00 | 1033 | static FC_DEVICE_ATTR(starget, field, S_IRUGO, \ |
1da177e4 LT |
1034 | show_fc_starget_##field, NULL) |
1035 | ||
1036 | #define fc_starget_rd_attr_cast(field, format_string, sz, cast) \ | |
1037 | fc_starget_show_function(field, format_string, sz, (cast)) \ | |
ee959b00 | 1038 | static FC_DEVICE_ATTR(starget, field, S_IRUGO, \ |
1da177e4 LT |
1039 | show_fc_starget_##field, NULL) |
1040 | ||
1041 | #define SETUP_STARGET_ATTRIBUTE_RD(field) \ | |
ee959b00 | 1042 | i->private_starget_attrs[count] = device_attr_starget_##field; \ |
1da177e4 LT |
1043 | i->private_starget_attrs[count].attr.mode = S_IRUGO; \ |
1044 | i->private_starget_attrs[count].store = NULL; \ | |
1045 | i->starget_attrs[count] = &i->private_starget_attrs[count]; \ | |
1046 | if (i->f->show_starget_##field) \ | |
1047 | count++ | |
1048 | ||
1049 | #define SETUP_STARGET_ATTRIBUTE_RW(field) \ | |
ee959b00 | 1050 | i->private_starget_attrs[count] = device_attr_starget_##field; \ |
1da177e4 LT |
1051 | if (!i->f->set_starget_##field) { \ |
1052 | i->private_starget_attrs[count].attr.mode = S_IRUGO; \ | |
1053 | i->private_starget_attrs[count].store = NULL; \ | |
1054 | } \ | |
1055 | i->starget_attrs[count] = &i->private_starget_attrs[count]; \ | |
1056 | if (i->f->show_starget_##field) \ | |
1057 | count++ | |
1058 | ||
1059 | /* The FC Transport SCSI Target Attributes: */ | |
1060 | fc_starget_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); | |
1061 | fc_starget_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); | |
1062 | fc_starget_rd_attr(port_id, "0x%06x\n", 20); | |
1063 | ||
1064 | ||
a53eb5e0 JS |
1065 | /* |
1066 | * FC Virtual Port Attribute Management | |
1067 | */ | |
1068 | ||
1069 | #define fc_vport_show_function(field, format_string, sz, cast) \ | |
1070 | static ssize_t \ | |
ee959b00 TJ |
1071 | show_fc_vport_##field (struct device *dev, \ |
1072 | struct device_attribute *attr, char *buf) \ | |
a53eb5e0 | 1073 | { \ |
ee959b00 | 1074 | struct fc_vport *vport = transport_class_to_vport(dev); \ |
a53eb5e0 JS |
1075 | struct Scsi_Host *shost = vport_to_shost(vport); \ |
1076 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
1077 | if ((i->f->get_vport_##field) && \ | |
1078 | !(vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))) \ | |
1079 | i->f->get_vport_##field(vport); \ | |
1080 | return snprintf(buf, sz, format_string, cast vport->field); \ | |
1081 | } | |
1082 | ||
1083 | #define fc_vport_store_function(field) \ | |
1084 | static ssize_t \ | |
ee959b00 TJ |
1085 | store_fc_vport_##field(struct device *dev, \ |
1086 | struct device_attribute *attr, \ | |
1087 | const char *buf, size_t count) \ | |
a53eb5e0 JS |
1088 | { \ |
1089 | int val; \ | |
ee959b00 | 1090 | struct fc_vport *vport = transport_class_to_vport(dev); \ |
a53eb5e0 JS |
1091 | struct Scsi_Host *shost = vport_to_shost(vport); \ |
1092 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
1093 | char *cp; \ | |
1094 | if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \ | |
1095 | return -EBUSY; \ | |
1096 | val = simple_strtoul(buf, &cp, 0); \ | |
1097 | if (*cp && (*cp != '\n')) \ | |
1098 | return -EINVAL; \ | |
1099 | i->f->set_vport_##field(vport, val); \ | |
1100 | return count; \ | |
1101 | } | |
1102 | ||
1103 | #define fc_vport_store_str_function(field, slen) \ | |
1104 | static ssize_t \ | |
ee959b00 TJ |
1105 | store_fc_vport_##field(struct device *dev, \ |
1106 | struct device_attribute *attr, \ | |
1107 | const char *buf, size_t count) \ | |
a53eb5e0 | 1108 | { \ |
ee959b00 | 1109 | struct fc_vport *vport = transport_class_to_vport(dev); \ |
a53eb5e0 JS |
1110 | struct Scsi_Host *shost = vport_to_shost(vport); \ |
1111 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
1112 | unsigned int cnt=count; \ | |
1113 | \ | |
1114 | /* count may include a LF at end of string */ \ | |
1115 | if (buf[cnt-1] == '\n') \ | |
1116 | cnt--; \ | |
1117 | if (cnt > ((slen) - 1)) \ | |
1118 | return -EINVAL; \ | |
1119 | memcpy(vport->field, buf, cnt); \ | |
1120 | i->f->set_vport_##field(vport); \ | |
1121 | return count; \ | |
1122 | } | |
1123 | ||
1124 | #define fc_vport_rd_attr(field, format_string, sz) \ | |
1125 | fc_vport_show_function(field, format_string, sz, ) \ | |
ee959b00 | 1126 | static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ |
a53eb5e0 JS |
1127 | show_fc_vport_##field, NULL) |
1128 | ||
1129 | #define fc_vport_rd_attr_cast(field, format_string, sz, cast) \ | |
1130 | fc_vport_show_function(field, format_string, sz, (cast)) \ | |
ee959b00 | 1131 | static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ |
a53eb5e0 JS |
1132 | show_fc_vport_##field, NULL) |
1133 | ||
1134 | #define fc_vport_rw_attr(field, format_string, sz) \ | |
1135 | fc_vport_show_function(field, format_string, sz, ) \ | |
1136 | fc_vport_store_function(field) \ | |
ee959b00 | 1137 | static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \ |
a53eb5e0 JS |
1138 | show_fc_vport_##field, \ |
1139 | store_fc_vport_##field) | |
1140 | ||
1141 | #define fc_private_vport_show_function(field, format_string, sz, cast) \ | |
1142 | static ssize_t \ | |
ee959b00 TJ |
1143 | show_fc_vport_##field (struct device *dev, \ |
1144 | struct device_attribute *attr, char *buf) \ | |
a53eb5e0 | 1145 | { \ |
ee959b00 | 1146 | struct fc_vport *vport = transport_class_to_vport(dev); \ |
a53eb5e0 JS |
1147 | return snprintf(buf, sz, format_string, cast vport->field); \ |
1148 | } | |
1149 | ||
1150 | #define fc_private_vport_store_u32_function(field) \ | |
1151 | static ssize_t \ | |
ee959b00 TJ |
1152 | store_fc_vport_##field(struct device *dev, \ |
1153 | struct device_attribute *attr, \ | |
1154 | const char *buf, size_t count) \ | |
a53eb5e0 JS |
1155 | { \ |
1156 | u32 val; \ | |
ee959b00 | 1157 | struct fc_vport *vport = transport_class_to_vport(dev); \ |
a53eb5e0 JS |
1158 | char *cp; \ |
1159 | if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \ | |
1160 | return -EBUSY; \ | |
1161 | val = simple_strtoul(buf, &cp, 0); \ | |
1162 | if (*cp && (*cp != '\n')) \ | |
1163 | return -EINVAL; \ | |
1164 | vport->field = val; \ | |
1165 | return count; \ | |
1166 | } | |
1167 | ||
1168 | ||
1169 | #define fc_private_vport_rd_attr(field, format_string, sz) \ | |
1170 | fc_private_vport_show_function(field, format_string, sz, ) \ | |
ee959b00 | 1171 | static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ |
a53eb5e0 JS |
1172 | show_fc_vport_##field, NULL) |
1173 | ||
1174 | #define fc_private_vport_rd_attr_cast(field, format_string, sz, cast) \ | |
1175 | fc_private_vport_show_function(field, format_string, sz, (cast)) \ | |
ee959b00 | 1176 | static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ |
a53eb5e0 JS |
1177 | show_fc_vport_##field, NULL) |
1178 | ||
1179 | #define fc_private_vport_rw_u32_attr(field, format_string, sz) \ | |
1180 | fc_private_vport_show_function(field, format_string, sz, ) \ | |
1181 | fc_private_vport_store_u32_function(field) \ | |
ee959b00 | 1182 | static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \ |
a53eb5e0 JS |
1183 | show_fc_vport_##field, \ |
1184 | store_fc_vport_##field) | |
1185 | ||
1186 | ||
1187 | #define fc_private_vport_rd_enum_attr(title, maxlen) \ | |
1188 | static ssize_t \ | |
ee959b00 TJ |
1189 | show_fc_vport_##title (struct device *dev, \ |
1190 | struct device_attribute *attr, \ | |
1191 | char *buf) \ | |
a53eb5e0 | 1192 | { \ |
ee959b00 | 1193 | struct fc_vport *vport = transport_class_to_vport(dev); \ |
a53eb5e0 JS |
1194 | const char *name; \ |
1195 | name = get_fc_##title##_name(vport->title); \ | |
1196 | if (!name) \ | |
1197 | return -EINVAL; \ | |
1198 | return snprintf(buf, maxlen, "%s\n", name); \ | |
1199 | } \ | |
ee959b00 | 1200 | static FC_DEVICE_ATTR(vport, title, S_IRUGO, \ |
a53eb5e0 JS |
1201 | show_fc_vport_##title, NULL) |
1202 | ||
1203 | ||
1204 | #define SETUP_VPORT_ATTRIBUTE_RD(field) \ | |
ee959b00 | 1205 | i->private_vport_attrs[count] = device_attr_vport_##field; \ |
a53eb5e0 JS |
1206 | i->private_vport_attrs[count].attr.mode = S_IRUGO; \ |
1207 | i->private_vport_attrs[count].store = NULL; \ | |
1208 | i->vport_attrs[count] = &i->private_vport_attrs[count]; \ | |
1209 | if (i->f->get_##field) \ | |
1210 | count++ | |
1211 | /* NOTE: Above MACRO differs: checks function not show bit */ | |
1212 | ||
1213 | #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(field) \ | |
ee959b00 | 1214 | i->private_vport_attrs[count] = device_attr_vport_##field; \ |
a53eb5e0 JS |
1215 | i->private_vport_attrs[count].attr.mode = S_IRUGO; \ |
1216 | i->private_vport_attrs[count].store = NULL; \ | |
1217 | i->vport_attrs[count] = &i->private_vport_attrs[count]; \ | |
1218 | count++ | |
1219 | ||
1220 | #define SETUP_VPORT_ATTRIBUTE_WR(field) \ | |
ee959b00 | 1221 | i->private_vport_attrs[count] = device_attr_vport_##field; \ |
a53eb5e0 JS |
1222 | i->vport_attrs[count] = &i->private_vport_attrs[count]; \ |
1223 | if (i->f->field) \ | |
1224 | count++ | |
1225 | /* NOTE: Above MACRO differs: checks function */ | |
1226 | ||
1227 | #define SETUP_VPORT_ATTRIBUTE_RW(field) \ | |
ee959b00 | 1228 | i->private_vport_attrs[count] = device_attr_vport_##field; \ |
a53eb5e0 JS |
1229 | if (!i->f->set_vport_##field) { \ |
1230 | i->private_vport_attrs[count].attr.mode = S_IRUGO; \ | |
1231 | i->private_vport_attrs[count].store = NULL; \ | |
1232 | } \ | |
1233 | i->vport_attrs[count] = &i->private_vport_attrs[count]; \ | |
1234 | count++ | |
1235 | /* NOTE: Above MACRO differs: does not check show bit */ | |
1236 | ||
1237 | #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RW(field) \ | |
1238 | { \ | |
ee959b00 | 1239 | i->private_vport_attrs[count] = device_attr_vport_##field; \ |
a53eb5e0 JS |
1240 | i->vport_attrs[count] = &i->private_vport_attrs[count]; \ |
1241 | count++; \ | |
1242 | } | |
1243 | ||
1244 | ||
1245 | /* The FC Transport Virtual Port Attributes: */ | |
1246 | ||
1247 | /* Fixed Virtual Port Attributes */ | |
1248 | ||
1249 | /* Dynamic Virtual Port Attributes */ | |
1250 | ||
1251 | /* Private Virtual Port Attributes */ | |
1252 | ||
1253 | fc_private_vport_rd_enum_attr(vport_state, FC_VPORTSTATE_MAX_NAMELEN); | |
1254 | fc_private_vport_rd_enum_attr(vport_last_state, FC_VPORTSTATE_MAX_NAMELEN); | |
1255 | fc_private_vport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); | |
1256 | fc_private_vport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); | |
1257 | ||
1258 | static ssize_t | |
ee959b00 TJ |
1259 | show_fc_vport_roles (struct device *dev, struct device_attribute *attr, |
1260 | char *buf) | |
a53eb5e0 | 1261 | { |
ee959b00 | 1262 | struct fc_vport *vport = transport_class_to_vport(dev); |
a53eb5e0 JS |
1263 | |
1264 | if (vport->roles == FC_PORT_ROLE_UNKNOWN) | |
1265 | return snprintf(buf, 20, "unknown\n"); | |
1266 | return get_fc_port_roles_names(vport->roles, buf); | |
1267 | } | |
ee959b00 | 1268 | static FC_DEVICE_ATTR(vport, roles, S_IRUGO, show_fc_vport_roles, NULL); |
a53eb5e0 JS |
1269 | |
1270 | fc_private_vport_rd_enum_attr(vport_type, FC_PORTTYPE_MAX_NAMELEN); | |
1271 | ||
1272 | fc_private_vport_show_function(symbolic_name, "%s\n", | |
1273 | FC_VPORT_SYMBOLIC_NAMELEN + 1, ) | |
1274 | fc_vport_store_str_function(symbolic_name, FC_VPORT_SYMBOLIC_NAMELEN) | |
ee959b00 | 1275 | static FC_DEVICE_ATTR(vport, symbolic_name, S_IRUGO | S_IWUSR, |
a53eb5e0 JS |
1276 | show_fc_vport_symbolic_name, store_fc_vport_symbolic_name); |
1277 | ||
1278 | static ssize_t | |
ee959b00 TJ |
1279 | store_fc_vport_delete(struct device *dev, struct device_attribute *attr, |
1280 | const char *buf, size_t count) | |
a53eb5e0 | 1281 | { |
ee959b00 | 1282 | struct fc_vport *vport = transport_class_to_vport(dev); |
9ef3e4a4 | 1283 | struct Scsi_Host *shost = vport_to_shost(vport); |
0d9dc7c8 GR |
1284 | unsigned long flags; |
1285 | ||
1286 | spin_lock_irqsave(shost->host_lock, flags); | |
1287 | if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) { | |
1288 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1289 | return -EBUSY; | |
1290 | } | |
1291 | vport->flags |= FC_VPORT_DELETING; | |
1292 | spin_unlock_irqrestore(shost->host_lock, flags); | |
a53eb5e0 | 1293 | |
9ef3e4a4 | 1294 | fc_queue_work(shost, &vport->vport_delete_work); |
a53eb5e0 JS |
1295 | return count; |
1296 | } | |
ee959b00 | 1297 | static FC_DEVICE_ATTR(vport, vport_delete, S_IWUSR, |
a53eb5e0 JS |
1298 | NULL, store_fc_vport_delete); |
1299 | ||
1300 | ||
1301 | /* | |
1302 | * Enable/Disable vport | |
1303 | * Write "1" to disable, write "0" to enable | |
1304 | */ | |
1305 | static ssize_t | |
ee959b00 TJ |
1306 | store_fc_vport_disable(struct device *dev, struct device_attribute *attr, |
1307 | const char *buf, | |
a53eb5e0 JS |
1308 | size_t count) |
1309 | { | |
ee959b00 | 1310 | struct fc_vport *vport = transport_class_to_vport(dev); |
a53eb5e0 JS |
1311 | struct Scsi_Host *shost = vport_to_shost(vport); |
1312 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
1313 | int stat; | |
1314 | ||
1315 | if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) | |
1316 | return -EBUSY; | |
1317 | ||
1318 | if (*buf == '0') { | |
1319 | if (vport->vport_state != FC_VPORT_DISABLED) | |
1320 | return -EALREADY; | |
1321 | } else if (*buf == '1') { | |
1322 | if (vport->vport_state == FC_VPORT_DISABLED) | |
1323 | return -EALREADY; | |
1324 | } else | |
1325 | return -EINVAL; | |
1326 | ||
1327 | stat = i->f->vport_disable(vport, ((*buf == '0') ? false : true)); | |
1328 | return stat ? stat : count; | |
1329 | } | |
ee959b00 | 1330 | static FC_DEVICE_ATTR(vport, vport_disable, S_IWUSR, |
a53eb5e0 JS |
1331 | NULL, store_fc_vport_disable); |
1332 | ||
1333 | ||
1da177e4 LT |
1334 | /* |
1335 | * Host Attribute Management | |
1336 | */ | |
1337 | ||
1338 | #define fc_host_show_function(field, format_string, sz, cast) \ | |
1339 | static ssize_t \ | |
ee959b00 TJ |
1340 | show_fc_host_##field (struct device *dev, \ |
1341 | struct device_attribute *attr, char *buf) \ | |
1da177e4 | 1342 | { \ |
ee959b00 | 1343 | struct Scsi_Host *shost = transport_class_to_shost(dev); \ |
1da177e4 LT |
1344 | struct fc_internal *i = to_fc_internal(shost->transportt); \ |
1345 | if (i->f->get_host_##field) \ | |
1346 | i->f->get_host_##field(shost); \ | |
1347 | return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \ | |
1348 | } | |
1349 | ||
1350 | #define fc_host_store_function(field) \ | |
1351 | static ssize_t \ | |
ee959b00 TJ |
1352 | store_fc_host_##field(struct device *dev, \ |
1353 | struct device_attribute *attr, \ | |
1354 | const char *buf, size_t count) \ | |
1da177e4 LT |
1355 | { \ |
1356 | int val; \ | |
ee959b00 | 1357 | struct Scsi_Host *shost = transport_class_to_shost(dev); \ |
1da177e4 | 1358 | struct fc_internal *i = to_fc_internal(shost->transportt); \ |
0f29b966 | 1359 | char *cp; \ |
1da177e4 | 1360 | \ |
0f29b966 JS |
1361 | val = simple_strtoul(buf, &cp, 0); \ |
1362 | if (*cp && (*cp != '\n')) \ | |
1363 | return -EINVAL; \ | |
1da177e4 LT |
1364 | i->f->set_host_##field(shost, val); \ |
1365 | return count; \ | |
1366 | } | |
1367 | ||
b8d08210 JS |
1368 | #define fc_host_store_str_function(field, slen) \ |
1369 | static ssize_t \ | |
ee959b00 TJ |
1370 | store_fc_host_##field(struct device *dev, \ |
1371 | struct device_attribute *attr, \ | |
1372 | const char *buf, size_t count) \ | |
b8d08210 | 1373 | { \ |
ee959b00 | 1374 | struct Scsi_Host *shost = transport_class_to_shost(dev); \ |
b8d08210 JS |
1375 | struct fc_internal *i = to_fc_internal(shost->transportt); \ |
1376 | unsigned int cnt=count; \ | |
1377 | \ | |
1378 | /* count may include a LF at end of string */ \ | |
1379 | if (buf[cnt-1] == '\n') \ | |
1380 | cnt--; \ | |
1381 | if (cnt > ((slen) - 1)) \ | |
1382 | return -EINVAL; \ | |
1383 | memcpy(fc_host_##field(shost), buf, cnt); \ | |
1384 | i->f->set_host_##field(shost); \ | |
1385 | return count; \ | |
1386 | } | |
1387 | ||
1da177e4 LT |
1388 | #define fc_host_rd_attr(field, format_string, sz) \ |
1389 | fc_host_show_function(field, format_string, sz, ) \ | |
ee959b00 | 1390 | static FC_DEVICE_ATTR(host, field, S_IRUGO, \ |
1da177e4 LT |
1391 | show_fc_host_##field, NULL) |
1392 | ||
1393 | #define fc_host_rd_attr_cast(field, format_string, sz, cast) \ | |
1394 | fc_host_show_function(field, format_string, sz, (cast)) \ | |
ee959b00 | 1395 | static FC_DEVICE_ATTR(host, field, S_IRUGO, \ |
1da177e4 LT |
1396 | show_fc_host_##field, NULL) |
1397 | ||
1398 | #define fc_host_rw_attr(field, format_string, sz) \ | |
1399 | fc_host_show_function(field, format_string, sz, ) \ | |
1400 | fc_host_store_function(field) \ | |
ee959b00 | 1401 | static FC_DEVICE_ATTR(host, field, S_IRUGO | S_IWUSR, \ |
1da177e4 LT |
1402 | show_fc_host_##field, \ |
1403 | store_fc_host_##field) | |
1404 | ||
1405 | #define fc_host_rd_enum_attr(title, maxlen) \ | |
1406 | static ssize_t \ | |
ee959b00 TJ |
1407 | show_fc_host_##title (struct device *dev, \ |
1408 | struct device_attribute *attr, char *buf) \ | |
1da177e4 | 1409 | { \ |
ee959b00 | 1410 | struct Scsi_Host *shost = transport_class_to_shost(dev); \ |
1da177e4 LT |
1411 | struct fc_internal *i = to_fc_internal(shost->transportt); \ |
1412 | const char *name; \ | |
1413 | if (i->f->get_host_##title) \ | |
1414 | i->f->get_host_##title(shost); \ | |
1415 | name = get_fc_##title##_name(fc_host_##title(shost)); \ | |
1416 | if (!name) \ | |
1417 | return -EINVAL; \ | |
1418 | return snprintf(buf, maxlen, "%s\n", name); \ | |
1419 | } \ | |
ee959b00 | 1420 | static FC_DEVICE_ATTR(host, title, S_IRUGO, show_fc_host_##title, NULL) |
1da177e4 LT |
1421 | |
1422 | #define SETUP_HOST_ATTRIBUTE_RD(field) \ | |
ee959b00 | 1423 | i->private_host_attrs[count] = device_attr_host_##field; \ |
1da177e4 LT |
1424 | i->private_host_attrs[count].attr.mode = S_IRUGO; \ |
1425 | i->private_host_attrs[count].store = NULL; \ | |
1426 | i->host_attrs[count] = &i->private_host_attrs[count]; \ | |
1427 | if (i->f->show_host_##field) \ | |
1428 | count++ | |
1429 | ||
a53eb5e0 | 1430 | #define SETUP_HOST_ATTRIBUTE_RD_NS(field) \ |
ee959b00 | 1431 | i->private_host_attrs[count] = device_attr_host_##field; \ |
a53eb5e0 JS |
1432 | i->private_host_attrs[count].attr.mode = S_IRUGO; \ |
1433 | i->private_host_attrs[count].store = NULL; \ | |
1434 | i->host_attrs[count] = &i->private_host_attrs[count]; \ | |
1435 | count++ | |
1436 | ||
1da177e4 | 1437 | #define SETUP_HOST_ATTRIBUTE_RW(field) \ |
ee959b00 | 1438 | i->private_host_attrs[count] = device_attr_host_##field; \ |
1da177e4 LT |
1439 | if (!i->f->set_host_##field) { \ |
1440 | i->private_host_attrs[count].attr.mode = S_IRUGO; \ | |
1441 | i->private_host_attrs[count].store = NULL; \ | |
1442 | } \ | |
1443 | i->host_attrs[count] = &i->private_host_attrs[count]; \ | |
1444 | if (i->f->show_host_##field) \ | |
1445 | count++ | |
1446 | ||
1447 | ||
1448 | #define fc_private_host_show_function(field, format_string, sz, cast) \ | |
1449 | static ssize_t \ | |
ee959b00 TJ |
1450 | show_fc_host_##field (struct device *dev, \ |
1451 | struct device_attribute *attr, char *buf) \ | |
1da177e4 | 1452 | { \ |
ee959b00 | 1453 | struct Scsi_Host *shost = transport_class_to_shost(dev); \ |
1da177e4 LT |
1454 | return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \ |
1455 | } | |
1456 | ||
1457 | #define fc_private_host_rd_attr(field, format_string, sz) \ | |
1458 | fc_private_host_show_function(field, format_string, sz, ) \ | |
ee959b00 | 1459 | static FC_DEVICE_ATTR(host, field, S_IRUGO, \ |
1da177e4 LT |
1460 | show_fc_host_##field, NULL) |
1461 | ||
1462 | #define fc_private_host_rd_attr_cast(field, format_string, sz, cast) \ | |
1463 | fc_private_host_show_function(field, format_string, sz, (cast)) \ | |
ee959b00 | 1464 | static FC_DEVICE_ATTR(host, field, S_IRUGO, \ |
1da177e4 LT |
1465 | show_fc_host_##field, NULL) |
1466 | ||
1467 | #define SETUP_PRIVATE_HOST_ATTRIBUTE_RD(field) \ | |
ee959b00 | 1468 | i->private_host_attrs[count] = device_attr_host_##field; \ |
1da177e4 LT |
1469 | i->private_host_attrs[count].attr.mode = S_IRUGO; \ |
1470 | i->private_host_attrs[count].store = NULL; \ | |
1471 | i->host_attrs[count] = &i->private_host_attrs[count]; \ | |
1472 | count++ | |
1473 | ||
1474 | #define SETUP_PRIVATE_HOST_ATTRIBUTE_RW(field) \ | |
91ca7b01 | 1475 | { \ |
ee959b00 | 1476 | i->private_host_attrs[count] = device_attr_host_##field; \ |
1da177e4 | 1477 | i->host_attrs[count] = &i->private_host_attrs[count]; \ |
91ca7b01 AV |
1478 | count++; \ |
1479 | } | |
1da177e4 LT |
1480 | |
1481 | ||
1482 | /* Fixed Host Attributes */ | |
1483 | ||
1484 | static ssize_t | |
ee959b00 TJ |
1485 | show_fc_host_supported_classes (struct device *dev, |
1486 | struct device_attribute *attr, char *buf) | |
1da177e4 | 1487 | { |
ee959b00 | 1488 | struct Scsi_Host *shost = transport_class_to_shost(dev); |
1da177e4 LT |
1489 | |
1490 | if (fc_host_supported_classes(shost) == FC_COS_UNSPECIFIED) | |
1491 | return snprintf(buf, 20, "unspecified\n"); | |
1492 | ||
1493 | return get_fc_cos_names(fc_host_supported_classes(shost), buf); | |
1494 | } | |
ee959b00 | 1495 | static FC_DEVICE_ATTR(host, supported_classes, S_IRUGO, |
1da177e4 LT |
1496 | show_fc_host_supported_classes, NULL); |
1497 | ||
1498 | static ssize_t | |
ee959b00 TJ |
1499 | show_fc_host_supported_fc4s (struct device *dev, |
1500 | struct device_attribute *attr, char *buf) | |
1da177e4 | 1501 | { |
ee959b00 | 1502 | struct Scsi_Host *shost = transport_class_to_shost(dev); |
1da177e4 LT |
1503 | return (ssize_t)show_fc_fc4s(buf, fc_host_supported_fc4s(shost)); |
1504 | } | |
ee959b00 | 1505 | static FC_DEVICE_ATTR(host, supported_fc4s, S_IRUGO, |
1da177e4 LT |
1506 | show_fc_host_supported_fc4s, NULL); |
1507 | ||
1508 | static ssize_t | |
ee959b00 TJ |
1509 | show_fc_host_supported_speeds (struct device *dev, |
1510 | struct device_attribute *attr, char *buf) | |
1da177e4 | 1511 | { |
ee959b00 | 1512 | struct Scsi_Host *shost = transport_class_to_shost(dev); |
1da177e4 LT |
1513 | |
1514 | if (fc_host_supported_speeds(shost) == FC_PORTSPEED_UNKNOWN) | |
1515 | return snprintf(buf, 20, "unknown\n"); | |
1516 | ||
1517 | return get_fc_port_speed_names(fc_host_supported_speeds(shost), buf); | |
1518 | } | |
ee959b00 | 1519 | static FC_DEVICE_ATTR(host, supported_speeds, S_IRUGO, |
1da177e4 LT |
1520 | show_fc_host_supported_speeds, NULL); |
1521 | ||
1522 | ||
1523 | fc_private_host_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); | |
1524 | fc_private_host_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); | |
6b7281d0 AH |
1525 | fc_private_host_rd_attr_cast(permanent_port_name, "0x%llx\n", 20, |
1526 | unsigned long long); | |
1da177e4 | 1527 | fc_private_host_rd_attr(maxframe_size, "%u bytes\n", 20); |
a53eb5e0 | 1528 | fc_private_host_rd_attr(max_npiv_vports, "%u\n", 20); |
1da177e4 | 1529 | fc_private_host_rd_attr(serial_number, "%s\n", (FC_SERIAL_NUMBER_SIZE +1)); |
bb8ef587 NP |
1530 | fc_private_host_rd_attr(manufacturer, "%s\n", FC_SERIAL_NUMBER_SIZE + 1); |
1531 | fc_private_host_rd_attr(model, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1); | |
1532 | fc_private_host_rd_attr(model_description, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1); | |
1533 | fc_private_host_rd_attr(hardware_version, "%s\n", FC_VERSION_STRING_SIZE + 1); | |
1534 | fc_private_host_rd_attr(driver_version, "%s\n", FC_VERSION_STRING_SIZE + 1); | |
1535 | fc_private_host_rd_attr(firmware_version, "%s\n", FC_VERSION_STRING_SIZE + 1); | |
1536 | fc_private_host_rd_attr(optionrom_version, "%s\n", FC_VERSION_STRING_SIZE + 1); | |
1da177e4 LT |
1537 | |
1538 | ||
1539 | /* Dynamic Host Attributes */ | |
1540 | ||
1541 | static ssize_t | |
ee959b00 TJ |
1542 | show_fc_host_active_fc4s (struct device *dev, |
1543 | struct device_attribute *attr, char *buf) | |
1da177e4 | 1544 | { |
ee959b00 | 1545 | struct Scsi_Host *shost = transport_class_to_shost(dev); |
1da177e4 LT |
1546 | struct fc_internal *i = to_fc_internal(shost->transportt); |
1547 | ||
1548 | if (i->f->get_host_active_fc4s) | |
1549 | i->f->get_host_active_fc4s(shost); | |
1550 | ||
1551 | return (ssize_t)show_fc_fc4s(buf, fc_host_active_fc4s(shost)); | |
1552 | } | |
ee959b00 | 1553 | static FC_DEVICE_ATTR(host, active_fc4s, S_IRUGO, |
1da177e4 LT |
1554 | show_fc_host_active_fc4s, NULL); |
1555 | ||
1556 | static ssize_t | |
ee959b00 TJ |
1557 | show_fc_host_speed (struct device *dev, |
1558 | struct device_attribute *attr, char *buf) | |
1da177e4 | 1559 | { |
ee959b00 | 1560 | struct Scsi_Host *shost = transport_class_to_shost(dev); |
1da177e4 LT |
1561 | struct fc_internal *i = to_fc_internal(shost->transportt); |
1562 | ||
1563 | if (i->f->get_host_speed) | |
1564 | i->f->get_host_speed(shost); | |
1565 | ||
1566 | if (fc_host_speed(shost) == FC_PORTSPEED_UNKNOWN) | |
1567 | return snprintf(buf, 20, "unknown\n"); | |
1568 | ||
1569 | return get_fc_port_speed_names(fc_host_speed(shost), buf); | |
1570 | } | |
ee959b00 | 1571 | static FC_DEVICE_ATTR(host, speed, S_IRUGO, |
1da177e4 LT |
1572 | show_fc_host_speed, NULL); |
1573 | ||
1574 | ||
1575 | fc_host_rd_attr(port_id, "0x%06x\n", 20); | |
1576 | fc_host_rd_enum_attr(port_type, FC_PORTTYPE_MAX_NAMELEN); | |
1577 | fc_host_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN); | |
1578 | fc_host_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long); | |
016131b8 | 1579 | fc_host_rd_attr(symbolic_name, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1); |
1da177e4 | 1580 | |
b8d08210 JS |
1581 | fc_private_host_show_function(system_hostname, "%s\n", |
1582 | FC_SYMBOLIC_NAME_SIZE + 1, ) | |
1583 | fc_host_store_str_function(system_hostname, FC_SYMBOLIC_NAME_SIZE) | |
ee959b00 | 1584 | static FC_DEVICE_ATTR(host, system_hostname, S_IRUGO | S_IWUSR, |
b8d08210 JS |
1585 | show_fc_host_system_hostname, store_fc_host_system_hostname); |
1586 | ||
1da177e4 LT |
1587 | |
1588 | /* Private Host Attributes */ | |
1589 | ||
1590 | static ssize_t | |
ee959b00 TJ |
1591 | show_fc_private_host_tgtid_bind_type(struct device *dev, |
1592 | struct device_attribute *attr, char *buf) | |
1da177e4 | 1593 | { |
ee959b00 | 1594 | struct Scsi_Host *shost = transport_class_to_shost(dev); |
1da177e4 LT |
1595 | const char *name; |
1596 | ||
1597 | name = get_fc_tgtid_bind_type_name(fc_host_tgtid_bind_type(shost)); | |
1598 | if (!name) | |
1599 | return -EINVAL; | |
1600 | return snprintf(buf, FC_BINDTYPE_MAX_NAMELEN, "%s\n", name); | |
1601 | } | |
1602 | ||
d16794f6 JSEC |
1603 | #define get_list_head_entry(pos, head, member) \ |
1604 | pos = list_entry((head)->next, typeof(*pos), member) | |
1605 | ||
1da177e4 | 1606 | static ssize_t |
ee959b00 TJ |
1607 | store_fc_private_host_tgtid_bind_type(struct device *dev, |
1608 | struct device_attribute *attr, const char *buf, size_t count) | |
1da177e4 | 1609 | { |
ee959b00 | 1610 | struct Scsi_Host *shost = transport_class_to_shost(dev); |
d16794f6 | 1611 | struct fc_rport *rport; |
1da177e4 LT |
1612 | enum fc_tgtid_binding_type val; |
1613 | unsigned long flags; | |
1614 | ||
1615 | if (get_fc_tgtid_bind_type_match(buf, &val)) | |
1616 | return -EINVAL; | |
1617 | ||
1618 | /* if changing bind type, purge all unused consistent bindings */ | |
1619 | if (val != fc_host_tgtid_bind_type(shost)) { | |
1620 | spin_lock_irqsave(shost->host_lock, flags); | |
d16794f6 JSEC |
1621 | while (!list_empty(&fc_host_rport_bindings(shost))) { |
1622 | get_list_head_entry(rport, | |
1623 | &fc_host_rport_bindings(shost), peers); | |
aedf3497 JS |
1624 | list_del(&rport->peers); |
1625 | rport->port_state = FC_PORTSTATE_DELETED; | |
1626 | fc_queue_work(shost, &rport->rport_delete_work); | |
d16794f6 | 1627 | } |
1da177e4 LT |
1628 | spin_unlock_irqrestore(shost->host_lock, flags); |
1629 | } | |
1630 | ||
1631 | fc_host_tgtid_bind_type(shost) = val; | |
1632 | return count; | |
1633 | } | |
1634 | ||
ee959b00 | 1635 | static FC_DEVICE_ATTR(host, tgtid_bind_type, S_IRUGO | S_IWUSR, |
1da177e4 LT |
1636 | show_fc_private_host_tgtid_bind_type, |
1637 | store_fc_private_host_tgtid_bind_type); | |
1638 | ||
91ca7b01 | 1639 | static ssize_t |
ee959b00 TJ |
1640 | store_fc_private_host_issue_lip(struct device *dev, |
1641 | struct device_attribute *attr, const char *buf, size_t count) | |
91ca7b01 | 1642 | { |
ee959b00 | 1643 | struct Scsi_Host *shost = transport_class_to_shost(dev); |
91ca7b01 AV |
1644 | struct fc_internal *i = to_fc_internal(shost->transportt); |
1645 | int ret; | |
1646 | ||
1647 | /* ignore any data value written to the attribute */ | |
1648 | if (i->f->issue_fc_host_lip) { | |
1649 | ret = i->f->issue_fc_host_lip(shost); | |
1650 | return ret ? ret: count; | |
1651 | } | |
1652 | ||
1653 | return -ENOENT; | |
1654 | } | |
1655 | ||
ee959b00 | 1656 | static FC_DEVICE_ATTR(host, issue_lip, S_IWUSR, NULL, |
91ca7b01 AV |
1657 | store_fc_private_host_issue_lip); |
1658 | ||
43ca910a MC |
1659 | static ssize_t |
1660 | store_fc_private_host_dev_loss_tmo(struct device *dev, | |
1661 | struct device_attribute *attr, | |
1662 | const char *buf, size_t count) | |
1663 | { | |
1664 | struct Scsi_Host *shost = transport_class_to_shost(dev); | |
1665 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); | |
1666 | struct fc_rport *rport; | |
1667 | unsigned long val, flags; | |
1668 | int rc; | |
1669 | ||
1670 | rc = fc_str_to_dev_loss(buf, &val); | |
1671 | if (rc) | |
1672 | return rc; | |
1673 | ||
1674 | fc_host_dev_loss_tmo(shost) = val; | |
1675 | spin_lock_irqsave(shost->host_lock, flags); | |
1676 | list_for_each_entry(rport, &fc_host->rports, peers) | |
1677 | fc_rport_set_dev_loss_tmo(rport, val); | |
1678 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1679 | return count; | |
1680 | } | |
a53eb5e0 | 1681 | |
43ca910a MC |
1682 | fc_private_host_show_function(dev_loss_tmo, "%d\n", 20, ); |
1683 | static FC_DEVICE_ATTR(host, dev_loss_tmo, S_IRUGO | S_IWUSR, | |
1684 | show_fc_host_dev_loss_tmo, | |
1685 | store_fc_private_host_dev_loss_tmo); | |
1686 | ||
1687 | fc_private_host_rd_attr(npiv_vports_inuse, "%u\n", 20); | |
a53eb5e0 | 1688 | |
1da177e4 LT |
1689 | /* |
1690 | * Host Statistics Management | |
1691 | */ | |
1692 | ||
1693 | /* Show a given an attribute in the statistics group */ | |
1694 | static ssize_t | |
ee959b00 | 1695 | fc_stat_show(const struct device *dev, char *buf, unsigned long offset) |
1da177e4 | 1696 | { |
ee959b00 | 1697 | struct Scsi_Host *shost = transport_class_to_shost(dev); |
1da177e4 LT |
1698 | struct fc_internal *i = to_fc_internal(shost->transportt); |
1699 | struct fc_host_statistics *stats; | |
1700 | ssize_t ret = -ENOENT; | |
1701 | ||
1702 | if (offset > sizeof(struct fc_host_statistics) || | |
1703 | offset % sizeof(u64) != 0) | |
1704 | WARN_ON(1); | |
1705 | ||
1706 | if (i->f->get_fc_host_stats) { | |
1707 | stats = (i->f->get_fc_host_stats)(shost); | |
1708 | if (stats) | |
1709 | ret = snprintf(buf, 20, "0x%llx\n", | |
1710 | (unsigned long long)*(u64 *)(((u8 *) stats) + offset)); | |
1711 | } | |
1712 | return ret; | |
1713 | } | |
1714 | ||
1715 | ||
1716 | /* generate a read-only statistics attribute */ | |
1717 | #define fc_host_statistic(name) \ | |
ee959b00 TJ |
1718 | static ssize_t show_fcstat_##name(struct device *cd, \ |
1719 | struct device_attribute *attr, \ | |
1720 | char *buf) \ | |
1da177e4 LT |
1721 | { \ |
1722 | return fc_stat_show(cd, buf, \ | |
1723 | offsetof(struct fc_host_statistics, name)); \ | |
1724 | } \ | |
ee959b00 | 1725 | static FC_DEVICE_ATTR(host, name, S_IRUGO, show_fcstat_##name, NULL) |
1da177e4 LT |
1726 | |
1727 | fc_host_statistic(seconds_since_last_reset); | |
1728 | fc_host_statistic(tx_frames); | |
1729 | fc_host_statistic(tx_words); | |
1730 | fc_host_statistic(rx_frames); | |
1731 | fc_host_statistic(rx_words); | |
1732 | fc_host_statistic(lip_count); | |
1733 | fc_host_statistic(nos_count); | |
1734 | fc_host_statistic(error_frames); | |
1735 | fc_host_statistic(dumped_frames); | |
1736 | fc_host_statistic(link_failure_count); | |
1737 | fc_host_statistic(loss_of_sync_count); | |
1738 | fc_host_statistic(loss_of_signal_count); | |
1739 | fc_host_statistic(prim_seq_protocol_err_count); | |
1740 | fc_host_statistic(invalid_tx_word_count); | |
1741 | fc_host_statistic(invalid_crc_count); | |
1742 | fc_host_statistic(fcp_input_requests); | |
1743 | fc_host_statistic(fcp_output_requests); | |
1744 | fc_host_statistic(fcp_control_requests); | |
1745 | fc_host_statistic(fcp_input_megabytes); | |
1746 | fc_host_statistic(fcp_output_megabytes); | |
e58abb0c VD |
1747 | fc_host_statistic(fcp_packet_alloc_failures); |
1748 | fc_host_statistic(fcp_packet_aborts); | |
1749 | fc_host_statistic(fcp_frame_alloc_failures); | |
1750 | fc_host_statistic(fc_no_free_exch); | |
1751 | fc_host_statistic(fc_no_free_exch_xid); | |
1752 | fc_host_statistic(fc_xid_not_found); | |
1753 | fc_host_statistic(fc_xid_busy); | |
1754 | fc_host_statistic(fc_seq_not_found); | |
1755 | fc_host_statistic(fc_non_bls_resp); | |
1da177e4 LT |
1756 | |
1757 | static ssize_t | |
ee959b00 TJ |
1758 | fc_reset_statistics(struct device *dev, struct device_attribute *attr, |
1759 | const char *buf, size_t count) | |
1da177e4 | 1760 | { |
ee959b00 | 1761 | struct Scsi_Host *shost = transport_class_to_shost(dev); |
1da177e4 LT |
1762 | struct fc_internal *i = to_fc_internal(shost->transportt); |
1763 | ||
1764 | /* ignore any data value written to the attribute */ | |
1765 | if (i->f->reset_fc_host_stats) { | |
1766 | i->f->reset_fc_host_stats(shost); | |
1767 | return count; | |
1768 | } | |
1769 | ||
1770 | return -ENOENT; | |
1771 | } | |
ee959b00 | 1772 | static FC_DEVICE_ATTR(host, reset_statistics, S_IWUSR, NULL, |
1da177e4 LT |
1773 | fc_reset_statistics); |
1774 | ||
1da177e4 | 1775 | static struct attribute *fc_statistics_attrs[] = { |
ee959b00 TJ |
1776 | &device_attr_host_seconds_since_last_reset.attr, |
1777 | &device_attr_host_tx_frames.attr, | |
1778 | &device_attr_host_tx_words.attr, | |
1779 | &device_attr_host_rx_frames.attr, | |
1780 | &device_attr_host_rx_words.attr, | |
1781 | &device_attr_host_lip_count.attr, | |
1782 | &device_attr_host_nos_count.attr, | |
1783 | &device_attr_host_error_frames.attr, | |
1784 | &device_attr_host_dumped_frames.attr, | |
1785 | &device_attr_host_link_failure_count.attr, | |
1786 | &device_attr_host_loss_of_sync_count.attr, | |
1787 | &device_attr_host_loss_of_signal_count.attr, | |
1788 | &device_attr_host_prim_seq_protocol_err_count.attr, | |
1789 | &device_attr_host_invalid_tx_word_count.attr, | |
1790 | &device_attr_host_invalid_crc_count.attr, | |
1791 | &device_attr_host_fcp_input_requests.attr, | |
1792 | &device_attr_host_fcp_output_requests.attr, | |
1793 | &device_attr_host_fcp_control_requests.attr, | |
1794 | &device_attr_host_fcp_input_megabytes.attr, | |
1795 | &device_attr_host_fcp_output_megabytes.attr, | |
e58abb0c VD |
1796 | &device_attr_host_fcp_packet_alloc_failures.attr, |
1797 | &device_attr_host_fcp_packet_aborts.attr, | |
1798 | &device_attr_host_fcp_frame_alloc_failures.attr, | |
1799 | &device_attr_host_fc_no_free_exch.attr, | |
1800 | &device_attr_host_fc_no_free_exch_xid.attr, | |
1801 | &device_attr_host_fc_xid_not_found.attr, | |
1802 | &device_attr_host_fc_xid_busy.attr, | |
1803 | &device_attr_host_fc_seq_not_found.attr, | |
1804 | &device_attr_host_fc_non_bls_resp.attr, | |
ee959b00 | 1805 | &device_attr_host_reset_statistics.attr, |
1da177e4 LT |
1806 | NULL |
1807 | }; | |
1808 | ||
1809 | static struct attribute_group fc_statistics_group = { | |
1810 | .name = "statistics", | |
1811 | .attrs = fc_statistics_attrs, | |
1812 | }; | |
1813 | ||
a53eb5e0 JS |
1814 | |
1815 | /* Host Vport Attributes */ | |
1816 | ||
1817 | static int | |
1818 | fc_parse_wwn(const char *ns, u64 *nm) | |
1819 | { | |
1820 | unsigned int i, j; | |
1821 | u8 wwn[8]; | |
1822 | ||
1823 | memset(wwn, 0, sizeof(wwn)); | |
1824 | ||
1825 | /* Validate and store the new name */ | |
1826 | for (i=0, j=0; i < 16; i++) { | |
ecc30990 AS |
1827 | int value; |
1828 | ||
1829 | value = hex_to_bin(*ns++); | |
1830 | if (value >= 0) | |
1831 | j = (j << 4) | value; | |
a53eb5e0 JS |
1832 | else |
1833 | return -EINVAL; | |
1834 | if (i % 2) { | |
1835 | wwn[i/2] = j & 0xff; | |
1836 | j = 0; | |
1837 | } | |
1838 | } | |
1839 | ||
1840 | *nm = wwn_to_u64(wwn); | |
1841 | ||
1842 | return 0; | |
1843 | } | |
1844 | ||
1845 | ||
1846 | /* | |
1847 | * "Short-cut" sysfs variable to create a new vport on a FC Host. | |
1848 | * Input is a string of the form "<WWPN>:<WWNN>". Other attributes | |
1849 | * will default to a NPIV-based FCP_Initiator; The WWNs are specified | |
1850 | * as hex characters, and may *not* contain any prefixes (e.g. 0x, x, etc) | |
1851 | */ | |
1852 | static ssize_t | |
ee959b00 TJ |
1853 | store_fc_host_vport_create(struct device *dev, struct device_attribute *attr, |
1854 | const char *buf, size_t count) | |
a53eb5e0 | 1855 | { |
ee959b00 | 1856 | struct Scsi_Host *shost = transport_class_to_shost(dev); |
a53eb5e0 JS |
1857 | struct fc_vport_identifiers vid; |
1858 | struct fc_vport *vport; | |
1859 | unsigned int cnt=count; | |
1860 | int stat; | |
1861 | ||
1862 | memset(&vid, 0, sizeof(vid)); | |
1863 | ||
1864 | /* count may include a LF at end of string */ | |
1865 | if (buf[cnt-1] == '\n') | |
1866 | cnt--; | |
1867 | ||
1868 | /* validate we have enough characters for WWPN */ | |
1869 | if ((cnt != (16+1+16)) || (buf[16] != ':')) | |
1870 | return -EINVAL; | |
1871 | ||
1872 | stat = fc_parse_wwn(&buf[0], &vid.port_name); | |
1873 | if (stat) | |
1874 | return stat; | |
1875 | ||
1876 | stat = fc_parse_wwn(&buf[17], &vid.node_name); | |
1877 | if (stat) | |
1878 | return stat; | |
1879 | ||
1880 | vid.roles = FC_PORT_ROLE_FCP_INITIATOR; | |
1881 | vid.vport_type = FC_PORTTYPE_NPIV; | |
1882 | /* vid.symbolic_name is already zero/NULL's */ | |
1883 | vid.disable = false; /* always enabled */ | |
1884 | ||
1885 | /* we only allow support on Channel 0 !!! */ | |
a30c3f69 | 1886 | stat = fc_vport_setup(shost, 0, &shost->shost_gendev, &vid, &vport); |
a53eb5e0 JS |
1887 | return stat ? stat : count; |
1888 | } | |
ee959b00 | 1889 | static FC_DEVICE_ATTR(host, vport_create, S_IWUSR, NULL, |
a53eb5e0 JS |
1890 | store_fc_host_vport_create); |
1891 | ||
1892 | ||
1893 | /* | |
1894 | * "Short-cut" sysfs variable to delete a vport on a FC Host. | |
1895 | * Vport is identified by a string containing "<WWPN>:<WWNN>". | |
1896 | * The WWNs are specified as hex characters, and may *not* contain | |
1897 | * any prefixes (e.g. 0x, x, etc) | |
1898 | */ | |
1899 | static ssize_t | |
ee959b00 TJ |
1900 | store_fc_host_vport_delete(struct device *dev, struct device_attribute *attr, |
1901 | const char *buf, size_t count) | |
a53eb5e0 | 1902 | { |
ee959b00 | 1903 | struct Scsi_Host *shost = transport_class_to_shost(dev); |
a53eb5e0 JS |
1904 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
1905 | struct fc_vport *vport; | |
1906 | u64 wwpn, wwnn; | |
1907 | unsigned long flags; | |
1908 | unsigned int cnt=count; | |
1909 | int stat, match; | |
1910 | ||
1911 | /* count may include a LF at end of string */ | |
1912 | if (buf[cnt-1] == '\n') | |
1913 | cnt--; | |
1914 | ||
1915 | /* validate we have enough characters for WWPN */ | |
1916 | if ((cnt != (16+1+16)) || (buf[16] != ':')) | |
1917 | return -EINVAL; | |
1918 | ||
1919 | stat = fc_parse_wwn(&buf[0], &wwpn); | |
1920 | if (stat) | |
1921 | return stat; | |
1922 | ||
1923 | stat = fc_parse_wwn(&buf[17], &wwnn); | |
1924 | if (stat) | |
1925 | return stat; | |
1926 | ||
1927 | spin_lock_irqsave(shost->host_lock, flags); | |
1928 | match = 0; | |
1929 | /* we only allow support on Channel 0 !!! */ | |
1930 | list_for_each_entry(vport, &fc_host->vports, peers) { | |
1931 | if ((vport->channel == 0) && | |
1932 | (vport->port_name == wwpn) && (vport->node_name == wwnn)) { | |
0d9dc7c8 GR |
1933 | if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) |
1934 | break; | |
1935 | vport->flags |= FC_VPORT_DELETING; | |
a53eb5e0 JS |
1936 | match = 1; |
1937 | break; | |
1938 | } | |
1939 | } | |
1940 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1941 | ||
1942 | if (!match) | |
1943 | return -ENODEV; | |
1944 | ||
1945 | stat = fc_vport_terminate(vport); | |
1946 | return stat ? stat : count; | |
1947 | } | |
ee959b00 | 1948 | static FC_DEVICE_ATTR(host, vport_delete, S_IWUSR, NULL, |
a53eb5e0 JS |
1949 | store_fc_host_vport_delete); |
1950 | ||
1951 | ||
1da177e4 LT |
1952 | static int fc_host_match(struct attribute_container *cont, |
1953 | struct device *dev) | |
1954 | { | |
1955 | struct Scsi_Host *shost; | |
1956 | struct fc_internal *i; | |
1957 | ||
1958 | if (!scsi_is_host_device(dev)) | |
1959 | return 0; | |
1960 | ||
1961 | shost = dev_to_shost(dev); | |
1962 | if (!shost->transportt || shost->transportt->host_attrs.ac.class | |
1963 | != &fc_host_class.class) | |
1964 | return 0; | |
1965 | ||
1966 | i = to_fc_internal(shost->transportt); | |
1967 | ||
1968 | return &i->t.host_attrs.ac == cont; | |
1969 | } | |
1970 | ||
1971 | static int fc_target_match(struct attribute_container *cont, | |
1972 | struct device *dev) | |
1973 | { | |
1974 | struct Scsi_Host *shost; | |
1975 | struct fc_internal *i; | |
1976 | ||
1977 | if (!scsi_is_target_device(dev)) | |
1978 | return 0; | |
1979 | ||
1980 | shost = dev_to_shost(dev->parent); | |
1981 | if (!shost->transportt || shost->transportt->host_attrs.ac.class | |
1982 | != &fc_host_class.class) | |
1983 | return 0; | |
1984 | ||
1985 | i = to_fc_internal(shost->transportt); | |
1986 | ||
1987 | return &i->t.target_attrs.ac == cont; | |
1988 | } | |
1989 | ||
1990 | static void fc_rport_dev_release(struct device *dev) | |
1991 | { | |
1992 | struct fc_rport *rport = dev_to_rport(dev); | |
1993 | put_device(dev->parent); | |
1994 | kfree(rport); | |
1995 | } | |
1996 | ||
1997 | int scsi_is_fc_rport(const struct device *dev) | |
1998 | { | |
1999 | return dev->release == fc_rport_dev_release; | |
2000 | } | |
2001 | EXPORT_SYMBOL(scsi_is_fc_rport); | |
2002 | ||
2003 | static int fc_rport_match(struct attribute_container *cont, | |
2004 | struct device *dev) | |
2005 | { | |
2006 | struct Scsi_Host *shost; | |
2007 | struct fc_internal *i; | |
2008 | ||
2009 | if (!scsi_is_fc_rport(dev)) | |
2010 | return 0; | |
2011 | ||
2012 | shost = dev_to_shost(dev->parent); | |
2013 | if (!shost->transportt || shost->transportt->host_attrs.ac.class | |
2014 | != &fc_host_class.class) | |
2015 | return 0; | |
2016 | ||
2017 | i = to_fc_internal(shost->transportt); | |
2018 | ||
2019 | return &i->rport_attr_cont.ac == cont; | |
2020 | } | |
2021 | ||
5c44cd2a | 2022 | |
a53eb5e0 JS |
2023 | static void fc_vport_dev_release(struct device *dev) |
2024 | { | |
2025 | struct fc_vport *vport = dev_to_vport(dev); | |
2026 | put_device(dev->parent); /* release kobj parent */ | |
2027 | kfree(vport); | |
2028 | } | |
2029 | ||
2030 | int scsi_is_fc_vport(const struct device *dev) | |
2031 | { | |
2032 | return dev->release == fc_vport_dev_release; | |
2033 | } | |
2034 | EXPORT_SYMBOL(scsi_is_fc_vport); | |
2035 | ||
2036 | static int fc_vport_match(struct attribute_container *cont, | |
2037 | struct device *dev) | |
2038 | { | |
2039 | struct fc_vport *vport; | |
2040 | struct Scsi_Host *shost; | |
2041 | struct fc_internal *i; | |
2042 | ||
2043 | if (!scsi_is_fc_vport(dev)) | |
2044 | return 0; | |
2045 | vport = dev_to_vport(dev); | |
2046 | ||
2047 | shost = vport_to_shost(vport); | |
2048 | if (!shost->transportt || shost->transportt->host_attrs.ac.class | |
2049 | != &fc_host_class.class) | |
2050 | return 0; | |
2051 | ||
2052 | i = to_fc_internal(shost->transportt); | |
2053 | return &i->vport_attr_cont.ac == cont; | |
2054 | } | |
2055 | ||
2056 | ||
c829c394 JS |
2057 | /** |
2058 | * fc_timed_out - FC Transport I/O timeout intercept handler | |
c829c394 JS |
2059 | * @scmd: The SCSI command which timed out |
2060 | * | |
2061 | * This routine protects against error handlers getting invoked while a | |
2062 | * rport is in a blocked state, typically due to a temporarily loss of | |
2063 | * connectivity. If the error handlers are allowed to proceed, requests | |
2064 | * to abort i/o, reset the target, etc will likely fail as there is no way | |
2065 | * to communicate with the device to perform the requested function. These | |
2066 | * failures may result in the midlayer taking the device offline, requiring | |
2067 | * manual intervention to restore operation. | |
2068 | * | |
2069 | * This routine, called whenever an i/o times out, validates the state of | |
2070 | * the underlying rport. If the rport is blocked, it returns | |
2071 | * EH_RESET_TIMER, which will continue to reschedule the timeout. | |
2072 | * Eventually, either the device will return, or devloss_tmo will fire, | |
2073 | * and when the timeout then fires, it will be handled normally. | |
2074 | * If the rport is not blocked, normal error handling continues. | |
2075 | * | |
2076 | * Notes: | |
2077 | * This routine assumes no locks are held on entry. | |
eb44820c | 2078 | */ |
242f9dcb | 2079 | static enum blk_eh_timer_return |
c829c394 JS |
2080 | fc_timed_out(struct scsi_cmnd *scmd) |
2081 | { | |
2082 | struct fc_rport *rport = starget_to_rport(scsi_target(scmd->device)); | |
2083 | ||
2084 | if (rport->port_state == FC_PORTSTATE_BLOCKED) | |
242f9dcb | 2085 | return BLK_EH_RESET_TIMER; |
c829c394 | 2086 | |
242f9dcb | 2087 | return BLK_EH_NOT_HANDLED; |
c829c394 JS |
2088 | } |
2089 | ||
5c44cd2a | 2090 | /* |
bda23253 JS |
2091 | * Called by fc_user_scan to locate an rport on the shost that |
2092 | * matches the channel and target id, and invoke scsi_scan_target() | |
2093 | * on the rport. | |
5c44cd2a | 2094 | */ |
bda23253 JS |
2095 | static void |
2096 | fc_user_scan_tgt(struct Scsi_Host *shost, uint channel, uint id, uint lun) | |
5c44cd2a JSEC |
2097 | { |
2098 | struct fc_rport *rport; | |
bda23253 JS |
2099 | unsigned long flags; |
2100 | ||
2101 | spin_lock_irqsave(shost->host_lock, flags); | |
5c44cd2a | 2102 | |
e02f3f59 CH |
2103 | list_for_each_entry(rport, &fc_host_rports(shost), peers) { |
2104 | if (rport->scsi_target_id == -1) | |
2105 | continue; | |
5c44cd2a | 2106 | |
0d2fcd9f HR |
2107 | if (rport->port_state != FC_PORTSTATE_ONLINE) |
2108 | continue; | |
2109 | ||
bda23253 JS |
2110 | if ((channel == rport->channel) && |
2111 | (id == rport->scsi_target_id)) { | |
2112 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2113 | scsi_scan_target(&rport->dev, channel, id, lun, 1); | |
2114 | return; | |
e02f3f59 CH |
2115 | } |
2116 | } | |
2117 | ||
bda23253 JS |
2118 | spin_unlock_irqrestore(shost->host_lock, flags); |
2119 | } | |
2120 | ||
2121 | /* | |
2122 | * Called via sysfs scan routines. Necessary, as the FC transport | |
2123 | * wants to place all target objects below the rport object. So this | |
2124 | * routine must invoke the scsi_scan_target() routine with the rport | |
2125 | * object as the parent. | |
2126 | */ | |
2127 | static int | |
2128 | fc_user_scan(struct Scsi_Host *shost, uint channel, uint id, uint lun) | |
2129 | { | |
2130 | uint chlo, chhi; | |
2131 | uint tgtlo, tgthi; | |
2132 | ||
2133 | if (((channel != SCAN_WILD_CARD) && (channel > shost->max_channel)) || | |
2134 | ((id != SCAN_WILD_CARD) && (id >= shost->max_id)) || | |
2135 | ((lun != SCAN_WILD_CARD) && (lun > shost->max_lun))) | |
2136 | return -EINVAL; | |
2137 | ||
2138 | if (channel == SCAN_WILD_CARD) { | |
2139 | chlo = 0; | |
2140 | chhi = shost->max_channel + 1; | |
2141 | } else { | |
2142 | chlo = channel; | |
2143 | chhi = channel + 1; | |
2144 | } | |
2145 | ||
2146 | if (id == SCAN_WILD_CARD) { | |
2147 | tgtlo = 0; | |
2148 | tgthi = shost->max_id; | |
2149 | } else { | |
2150 | tgtlo = id; | |
2151 | tgthi = id + 1; | |
2152 | } | |
2153 | ||
2154 | for ( ; chlo < chhi; chlo++) | |
2155 | for ( ; tgtlo < tgthi; tgtlo++) | |
2156 | fc_user_scan_tgt(shost, chlo, tgtlo, lun); | |
2157 | ||
e02f3f59 | 2158 | return 0; |
5c44cd2a JSEC |
2159 | } |
2160 | ||
7525236d FT |
2161 | static int fc_tsk_mgmt_response(struct Scsi_Host *shost, u64 nexus, u64 tm_id, |
2162 | int result) | |
2163 | { | |
2164 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
2165 | return i->f->tsk_mgmt_response(shost, nexus, tm_id, result); | |
2166 | } | |
2167 | ||
2168 | static int fc_it_nexus_response(struct Scsi_Host *shost, u64 nexus, int result) | |
2169 | { | |
2170 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
2171 | return i->f->it_nexus_response(shost, nexus, result); | |
2172 | } | |
2173 | ||
1da177e4 LT |
2174 | struct scsi_transport_template * |
2175 | fc_attach_transport(struct fc_function_template *ft) | |
2176 | { | |
1da177e4 | 2177 | int count; |
24669f75 JS |
2178 | struct fc_internal *i = kzalloc(sizeof(struct fc_internal), |
2179 | GFP_KERNEL); | |
1da177e4 LT |
2180 | |
2181 | if (unlikely(!i)) | |
2182 | return NULL; | |
2183 | ||
1da177e4 LT |
2184 | i->t.target_attrs.ac.attrs = &i->starget_attrs[0]; |
2185 | i->t.target_attrs.ac.class = &fc_transport_class.class; | |
2186 | i->t.target_attrs.ac.match = fc_target_match; | |
2187 | i->t.target_size = sizeof(struct fc_starget_attrs); | |
2188 | transport_container_register(&i->t.target_attrs); | |
2189 | ||
2190 | i->t.host_attrs.ac.attrs = &i->host_attrs[0]; | |
2191 | i->t.host_attrs.ac.class = &fc_host_class.class; | |
2192 | i->t.host_attrs.ac.match = fc_host_match; | |
2193 | i->t.host_size = sizeof(struct fc_host_attrs); | |
2194 | if (ft->get_fc_host_stats) | |
2195 | i->t.host_attrs.statistics = &fc_statistics_group; | |
2196 | transport_container_register(&i->t.host_attrs); | |
2197 | ||
2198 | i->rport_attr_cont.ac.attrs = &i->rport_attrs[0]; | |
2199 | i->rport_attr_cont.ac.class = &fc_rport_class.class; | |
2200 | i->rport_attr_cont.ac.match = fc_rport_match; | |
2201 | transport_container_register(&i->rport_attr_cont); | |
2202 | ||
a53eb5e0 JS |
2203 | i->vport_attr_cont.ac.attrs = &i->vport_attrs[0]; |
2204 | i->vport_attr_cont.ac.class = &fc_vport_class.class; | |
2205 | i->vport_attr_cont.ac.match = fc_vport_match; | |
2206 | transport_container_register(&i->vport_attr_cont); | |
2207 | ||
1da177e4 LT |
2208 | i->f = ft; |
2209 | ||
2210 | /* Transport uses the shost workq for scsi scanning */ | |
2211 | i->t.create_work_queue = 1; | |
5c44cd2a | 2212 | |
c829c394 JS |
2213 | i->t.eh_timed_out = fc_timed_out; |
2214 | ||
e02f3f59 | 2215 | i->t.user_scan = fc_user_scan; |
9ef3e4a4 | 2216 | |
7525236d FT |
2217 | /* target-mode drivers' functions */ |
2218 | i->t.tsk_mgmt_response = fc_tsk_mgmt_response; | |
2219 | i->t.it_nexus_response = fc_it_nexus_response; | |
2220 | ||
1da177e4 LT |
2221 | /* |
2222 | * Setup SCSI Target Attributes. | |
2223 | */ | |
2224 | count = 0; | |
2225 | SETUP_STARGET_ATTRIBUTE_RD(node_name); | |
2226 | SETUP_STARGET_ATTRIBUTE_RD(port_name); | |
2227 | SETUP_STARGET_ATTRIBUTE_RD(port_id); | |
2228 | ||
2229 | BUG_ON(count > FC_STARGET_NUM_ATTRS); | |
2230 | ||
2231 | i->starget_attrs[count] = NULL; | |
2232 | ||
2233 | ||
2234 | /* | |
2235 | * Setup SCSI Host Attributes. | |
2236 | */ | |
2237 | count=0; | |
2238 | SETUP_HOST_ATTRIBUTE_RD(node_name); | |
2239 | SETUP_HOST_ATTRIBUTE_RD(port_name); | |
6b7281d0 | 2240 | SETUP_HOST_ATTRIBUTE_RD(permanent_port_name); |
1da177e4 LT |
2241 | SETUP_HOST_ATTRIBUTE_RD(supported_classes); |
2242 | SETUP_HOST_ATTRIBUTE_RD(supported_fc4s); | |
1da177e4 LT |
2243 | SETUP_HOST_ATTRIBUTE_RD(supported_speeds); |
2244 | SETUP_HOST_ATTRIBUTE_RD(maxframe_size); | |
a53eb5e0 JS |
2245 | if (ft->vport_create) { |
2246 | SETUP_HOST_ATTRIBUTE_RD_NS(max_npiv_vports); | |
2247 | SETUP_HOST_ATTRIBUTE_RD_NS(npiv_vports_inuse); | |
2248 | } | |
1da177e4 | 2249 | SETUP_HOST_ATTRIBUTE_RD(serial_number); |
bb8ef587 NP |
2250 | SETUP_HOST_ATTRIBUTE_RD(manufacturer); |
2251 | SETUP_HOST_ATTRIBUTE_RD(model); | |
2252 | SETUP_HOST_ATTRIBUTE_RD(model_description); | |
2253 | SETUP_HOST_ATTRIBUTE_RD(hardware_version); | |
2254 | SETUP_HOST_ATTRIBUTE_RD(driver_version); | |
2255 | SETUP_HOST_ATTRIBUTE_RD(firmware_version); | |
2256 | SETUP_HOST_ATTRIBUTE_RD(optionrom_version); | |
1da177e4 LT |
2257 | |
2258 | SETUP_HOST_ATTRIBUTE_RD(port_id); | |
2259 | SETUP_HOST_ATTRIBUTE_RD(port_type); | |
2260 | SETUP_HOST_ATTRIBUTE_RD(port_state); | |
2261 | SETUP_HOST_ATTRIBUTE_RD(active_fc4s); | |
2262 | SETUP_HOST_ATTRIBUTE_RD(speed); | |
2263 | SETUP_HOST_ATTRIBUTE_RD(fabric_name); | |
016131b8 | 2264 | SETUP_HOST_ATTRIBUTE_RD(symbolic_name); |
b8d08210 | 2265 | SETUP_HOST_ATTRIBUTE_RW(system_hostname); |
1da177e4 LT |
2266 | |
2267 | /* Transport-managed attributes */ | |
43ca910a | 2268 | SETUP_PRIVATE_HOST_ATTRIBUTE_RW(dev_loss_tmo); |
1da177e4 | 2269 | SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type); |
91ca7b01 AV |
2270 | if (ft->issue_fc_host_lip) |
2271 | SETUP_PRIVATE_HOST_ATTRIBUTE_RW(issue_lip); | |
a53eb5e0 JS |
2272 | if (ft->vport_create) |
2273 | SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_create); | |
2274 | if (ft->vport_delete) | |
2275 | SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_delete); | |
1da177e4 LT |
2276 | |
2277 | BUG_ON(count > FC_HOST_NUM_ATTRS); | |
2278 | ||
2279 | i->host_attrs[count] = NULL; | |
2280 | ||
2281 | /* | |
2282 | * Setup Remote Port Attributes. | |
2283 | */ | |
2284 | count=0; | |
2285 | SETUP_RPORT_ATTRIBUTE_RD(maxframe_size); | |
2286 | SETUP_RPORT_ATTRIBUTE_RD(supported_classes); | |
2287 | SETUP_RPORT_ATTRIBUTE_RW(dev_loss_tmo); | |
2288 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(node_name); | |
2289 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_name); | |
2290 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_id); | |
2291 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(roles); | |
2292 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_state); | |
2293 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(scsi_target_id); | |
fff9d40c | 2294 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(fast_io_fail_tmo); |
1da177e4 LT |
2295 | |
2296 | BUG_ON(count > FC_RPORT_NUM_ATTRS); | |
2297 | ||
2298 | i->rport_attrs[count] = NULL; | |
2299 | ||
a53eb5e0 JS |
2300 | /* |
2301 | * Setup Virtual Port Attributes. | |
2302 | */ | |
2303 | count=0; | |
2304 | SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_state); | |
2305 | SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_last_state); | |
2306 | SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(node_name); | |
2307 | SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(port_name); | |
2308 | SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(roles); | |
2309 | SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_type); | |
2310 | SETUP_VPORT_ATTRIBUTE_RW(symbolic_name); | |
2311 | SETUP_VPORT_ATTRIBUTE_WR(vport_delete); | |
2312 | SETUP_VPORT_ATTRIBUTE_WR(vport_disable); | |
2313 | ||
2314 | BUG_ON(count > FC_VPORT_NUM_ATTRS); | |
2315 | ||
2316 | i->vport_attrs[count] = NULL; | |
2317 | ||
1da177e4 LT |
2318 | return &i->t; |
2319 | } | |
2320 | EXPORT_SYMBOL(fc_attach_transport); | |
2321 | ||
2322 | void fc_release_transport(struct scsi_transport_template *t) | |
2323 | { | |
2324 | struct fc_internal *i = to_fc_internal(t); | |
2325 | ||
2326 | transport_container_unregister(&i->t.target_attrs); | |
2327 | transport_container_unregister(&i->t.host_attrs); | |
2328 | transport_container_unregister(&i->rport_attr_cont); | |
a53eb5e0 | 2329 | transport_container_unregister(&i->vport_attr_cont); |
1da177e4 LT |
2330 | |
2331 | kfree(i); | |
2332 | } | |
2333 | EXPORT_SYMBOL(fc_release_transport); | |
2334 | ||
aedf3497 JS |
2335 | /** |
2336 | * fc_queue_work - Queue work to the fc_host workqueue. | |
2337 | * @shost: Pointer to Scsi_Host bound to fc_host. | |
2338 | * @work: Work to queue for execution. | |
2339 | * | |
2340 | * Return value: | |
a0785edf JS |
2341 | * 1 - work queued for execution |
2342 | * 0 - work is already queued | |
2343 | * -EINVAL - work queue doesn't exist | |
eb44820c | 2344 | */ |
aedf3497 JS |
2345 | static int |
2346 | fc_queue_work(struct Scsi_Host *shost, struct work_struct *work) | |
2347 | { | |
2348 | if (unlikely(!fc_host_work_q(shost))) { | |
2349 | printk(KERN_ERR | |
2350 | "ERROR: FC host '%s' attempted to queue work, " | |
2351 | "when no workqueue created.\n", shost->hostt->name); | |
2352 | dump_stack(); | |
2353 | ||
2354 | return -EINVAL; | |
2355 | } | |
2356 | ||
2357 | return queue_work(fc_host_work_q(shost), work); | |
2358 | } | |
2359 | ||
2360 | /** | |
2361 | * fc_flush_work - Flush a fc_host's workqueue. | |
2362 | * @shost: Pointer to Scsi_Host bound to fc_host. | |
eb44820c | 2363 | */ |
aedf3497 JS |
2364 | static void |
2365 | fc_flush_work(struct Scsi_Host *shost) | |
2366 | { | |
2367 | if (!fc_host_work_q(shost)) { | |
2368 | printk(KERN_ERR | |
2369 | "ERROR: FC host '%s' attempted to flush work, " | |
2370 | "when no workqueue created.\n", shost->hostt->name); | |
2371 | dump_stack(); | |
2372 | return; | |
2373 | } | |
2374 | ||
2375 | flush_workqueue(fc_host_work_q(shost)); | |
2376 | } | |
2377 | ||
2378 | /** | |
2379 | * fc_queue_devloss_work - Schedule work for the fc_host devloss workqueue. | |
2380 | * @shost: Pointer to Scsi_Host bound to fc_host. | |
2381 | * @work: Work to queue for execution. | |
2382 | * @delay: jiffies to delay the work queuing | |
2383 | * | |
2384 | * Return value: | |
0f29b966 | 2385 | * 1 on success / 0 already queued / < 0 for error |
eb44820c | 2386 | */ |
aedf3497 | 2387 | static int |
c4028958 | 2388 | fc_queue_devloss_work(struct Scsi_Host *shost, struct delayed_work *work, |
aedf3497 JS |
2389 | unsigned long delay) |
2390 | { | |
2391 | if (unlikely(!fc_host_devloss_work_q(shost))) { | |
2392 | printk(KERN_ERR | |
2393 | "ERROR: FC host '%s' attempted to queue work, " | |
2394 | "when no workqueue created.\n", shost->hostt->name); | |
2395 | dump_stack(); | |
2396 | ||
2397 | return -EINVAL; | |
2398 | } | |
2399 | ||
2400 | return queue_delayed_work(fc_host_devloss_work_q(shost), work, delay); | |
2401 | } | |
2402 | ||
2403 | /** | |
2404 | * fc_flush_devloss - Flush a fc_host's devloss workqueue. | |
2405 | * @shost: Pointer to Scsi_Host bound to fc_host. | |
eb44820c | 2406 | */ |
aedf3497 JS |
2407 | static void |
2408 | fc_flush_devloss(struct Scsi_Host *shost) | |
2409 | { | |
2410 | if (!fc_host_devloss_work_q(shost)) { | |
2411 | printk(KERN_ERR | |
2412 | "ERROR: FC host '%s' attempted to flush work, " | |
2413 | "when no workqueue created.\n", shost->hostt->name); | |
2414 | dump_stack(); | |
2415 | return; | |
2416 | } | |
2417 | ||
2418 | flush_workqueue(fc_host_devloss_work_q(shost)); | |
2419 | } | |
2420 | ||
1da177e4 LT |
2421 | |
2422 | /** | |
eb44820c RL |
2423 | * fc_remove_host - called to terminate any fc_transport-related elements for a scsi host. |
2424 | * @shost: Which &Scsi_Host | |
1da177e4 | 2425 | * |
25985edc | 2426 | * This routine is expected to be called immediately preceding the |
1da177e4 LT |
2427 | * a driver's call to scsi_remove_host(). |
2428 | * | |
2429 | * WARNING: A driver utilizing the fc_transport, which fails to call | |
eb44820c | 2430 | * this routine prior to scsi_remove_host(), will leave dangling |
1da177e4 LT |
2431 | * objects in /sys/class/fc_remote_ports. Access to any of these |
2432 | * objects can result in a system crash !!! | |
2433 | * | |
2434 | * Notes: | |
2435 | * This routine assumes no locks are held on entry. | |
eb44820c | 2436 | */ |
1da177e4 LT |
2437 | void |
2438 | fc_remove_host(struct Scsi_Host *shost) | |
2439 | { | |
a53eb5e0 JS |
2440 | struct fc_vport *vport = NULL, *next_vport = NULL; |
2441 | struct fc_rport *rport = NULL, *next_rport = NULL; | |
aedf3497 JS |
2442 | struct workqueue_struct *work_q; |
2443 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); | |
a53eb5e0 | 2444 | unsigned long flags; |
a53eb5e0 JS |
2445 | |
2446 | spin_lock_irqsave(shost->host_lock, flags); | |
2447 | ||
2448 | /* Remove any vports */ | |
9ef3e4a4 JS |
2449 | list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers) |
2450 | fc_queue_work(shost, &vport->vport_delete_work); | |
1da177e4 LT |
2451 | |
2452 | /* Remove any remote ports */ | |
2453 | list_for_each_entry_safe(rport, next_rport, | |
aedf3497 JS |
2454 | &fc_host->rports, peers) { |
2455 | list_del(&rport->peers); | |
2456 | rport->port_state = FC_PORTSTATE_DELETED; | |
2457 | fc_queue_work(shost, &rport->rport_delete_work); | |
2458 | } | |
2459 | ||
1da177e4 | 2460 | list_for_each_entry_safe(rport, next_rport, |
aedf3497 JS |
2461 | &fc_host->rport_bindings, peers) { |
2462 | list_del(&rport->peers); | |
2463 | rport->port_state = FC_PORTSTATE_DELETED; | |
2464 | fc_queue_work(shost, &rport->rport_delete_work); | |
2465 | } | |
2466 | ||
a53eb5e0 JS |
2467 | spin_unlock_irqrestore(shost->host_lock, flags); |
2468 | ||
aedf3497 JS |
2469 | /* flush all scan work items */ |
2470 | scsi_flush_work(shost); | |
2471 | ||
2472 | /* flush all stgt delete, and rport delete work items, then kill it */ | |
2473 | if (fc_host->work_q) { | |
2474 | work_q = fc_host->work_q; | |
2475 | fc_host->work_q = NULL; | |
2476 | destroy_workqueue(work_q); | |
2477 | } | |
2478 | ||
2479 | /* flush all devloss work items, then kill it */ | |
2480 | if (fc_host->devloss_work_q) { | |
2481 | work_q = fc_host->devloss_work_q; | |
2482 | fc_host->devloss_work_q = NULL; | |
2483 | destroy_workqueue(work_q); | |
2484 | } | |
1da177e4 LT |
2485 | } |
2486 | EXPORT_SYMBOL(fc_remove_host); | |
2487 | ||
fff9d40c MC |
2488 | static void fc_terminate_rport_io(struct fc_rport *rport) |
2489 | { | |
2490 | struct Scsi_Host *shost = rport_to_shost(rport); | |
2491 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
2492 | ||
2493 | /* Involve the LLDD if possible to terminate all io on the rport. */ | |
2494 | if (i->f->terminate_rport_io) | |
2495 | i->f->terminate_rport_io(rport); | |
2496 | ||
2497 | /* | |
5d9fb5cc | 2498 | * Must unblock to flush queued IO. scsi-ml will fail incoming reqs. |
fff9d40c | 2499 | */ |
5d9fb5cc | 2500 | scsi_target_unblock(&rport->dev, SDEV_TRANSPORT_OFFLINE); |
fff9d40c | 2501 | } |
aedf3497 JS |
2502 | |
2503 | /** | |
25985edc | 2504 | * fc_starget_delete - called to delete the scsi descendants of an rport |
c4028958 | 2505 | * @work: remote port to be operated on. |
eb44820c RL |
2506 | * |
2507 | * Deletes target and all sdevs. | |
2508 | */ | |
19a7b4ae | 2509 | static void |
c4028958 | 2510 | fc_starget_delete(struct work_struct *work) |
19a7b4ae | 2511 | { |
c4028958 DH |
2512 | struct fc_rport *rport = |
2513 | container_of(work, struct fc_rport, stgt_delete_work); | |
19a7b4ae | 2514 | |
fff9d40c | 2515 | fc_terminate_rport_io(rport); |
19a7b4ae JSEC |
2516 | scsi_remove_target(&rport->dev); |
2517 | } | |
2518 | ||
aedf3497 JS |
2519 | |
2520 | /** | |
2521 | * fc_rport_final_delete - finish rport termination and delete it. | |
c4028958 | 2522 | * @work: remote port to be deleted. |
eb44820c | 2523 | */ |
aedf3497 | 2524 | static void |
c4028958 | 2525 | fc_rport_final_delete(struct work_struct *work) |
aedf3497 | 2526 | { |
c4028958 DH |
2527 | struct fc_rport *rport = |
2528 | container_of(work, struct fc_rport, rport_delete_work); | |
aedf3497 JS |
2529 | struct device *dev = &rport->dev; |
2530 | struct Scsi_Host *shost = rport_to_shost(rport); | |
0f29b966 | 2531 | struct fc_internal *i = to_fc_internal(shost->transportt); |
92740b24 | 2532 | unsigned long flags; |
8798a694 | 2533 | int do_callback = 0; |
aedf3497 | 2534 | |
112f661d NNS |
2535 | fc_terminate_rport_io(rport); |
2536 | ||
aedf3497 | 2537 | /* |
9ef3e4a4 | 2538 | * if a scan is pending, flush the SCSI Host work_q so that |
aedf3497 JS |
2539 | * that we can reclaim the rport scan work element. |
2540 | */ | |
2541 | if (rport->flags & FC_RPORT_SCAN_PENDING) | |
2542 | scsi_flush_work(shost); | |
2543 | ||
92740b24 JS |
2544 | /* |
2545 | * Cancel any outstanding timers. These should really exist | |
2546 | * only when rmmod'ing the LLDD and we're asking for | |
2547 | * immediate termination of the rports | |
2548 | */ | |
2549 | spin_lock_irqsave(shost->host_lock, flags); | |
2550 | if (rport->flags & FC_RPORT_DEVLOSS_PENDING) { | |
2551 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2552 | if (!cancel_delayed_work(&rport->fail_io_work)) | |
2553 | fc_flush_devloss(shost); | |
2554 | if (!cancel_delayed_work(&rport->dev_loss_work)) | |
2555 | fc_flush_devloss(shost); | |
2556 | spin_lock_irqsave(shost->host_lock, flags); | |
2557 | rport->flags &= ~FC_RPORT_DEVLOSS_PENDING; | |
2558 | } | |
2559 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2560 | ||
0f29b966 JS |
2561 | /* Delete SCSI target and sdevs */ |
2562 | if (rport->scsi_target_id != -1) | |
c4028958 | 2563 | fc_starget_delete(&rport->stgt_delete_work); |
92740b24 JS |
2564 | |
2565 | /* | |
2566 | * Notify the driver that the rport is now dead. The LLDD will | |
2567 | * also guarantee that any communication to the rport is terminated | |
4be98c0c JS |
2568 | * |
2569 | * Avoid this call if we already called it when we preserved the | |
2570 | * rport for the binding. | |
92740b24 | 2571 | */ |
8798a694 | 2572 | spin_lock_irqsave(shost->host_lock, flags); |
4be98c0c | 2573 | if (!(rport->flags & FC_RPORT_DEVLOSS_CALLBK_DONE) && |
8798a694 MR |
2574 | (i->f->dev_loss_tmo_callbk)) { |
2575 | rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE; | |
2576 | do_callback = 1; | |
2577 | } | |
2578 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2579 | ||
2580 | if (do_callback) | |
0f29b966 | 2581 | i->f->dev_loss_tmo_callbk(rport); |
0f29b966 | 2582 | |
9e4f5e29 JS |
2583 | fc_bsg_remove(rport->rqst_q); |
2584 | ||
aedf3497 JS |
2585 | transport_remove_device(dev); |
2586 | device_del(dev); | |
2587 | transport_destroy_device(dev); | |
3bdad7bd JS |
2588 | put_device(&shost->shost_gendev); /* for fc_host->rport list */ |
2589 | put_device(dev); /* for self-reference */ | |
aedf3497 JS |
2590 | } |
2591 | ||
2592 | ||
1da177e4 LT |
2593 | /** |
2594 | * fc_rport_create - allocates and creates a remote FC port. | |
2595 | * @shost: scsi host the remote port is connected to. | |
2596 | * @channel: Channel on shost port connected to. | |
2597 | * @ids: The world wide names, fc address, and FC4 port | |
2598 | * roles for the remote port. | |
2599 | * | |
2600 | * Allocates and creates the remoter port structure, including the | |
2601 | * class and sysfs creation. | |
2602 | * | |
2603 | * Notes: | |
2604 | * This routine assumes no locks are held on entry. | |
eb44820c | 2605 | */ |
44818efb | 2606 | static struct fc_rport * |
1da177e4 LT |
2607 | fc_rport_create(struct Scsi_Host *shost, int channel, |
2608 | struct fc_rport_identifiers *ids) | |
2609 | { | |
aedf3497 | 2610 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
1da177e4 LT |
2611 | struct fc_internal *fci = to_fc_internal(shost->transportt); |
2612 | struct fc_rport *rport; | |
2613 | struct device *dev; | |
2614 | unsigned long flags; | |
2615 | int error; | |
2616 | size_t size; | |
2617 | ||
2618 | size = (sizeof(struct fc_rport) + fci->f->dd_fcrport_size); | |
24669f75 | 2619 | rport = kzalloc(size, GFP_KERNEL); |
1da177e4 | 2620 | if (unlikely(!rport)) { |
cadbd4a5 | 2621 | printk(KERN_ERR "%s: allocation failure\n", __func__); |
1da177e4 LT |
2622 | return NULL; |
2623 | } | |
1da177e4 LT |
2624 | |
2625 | rport->maxframe_size = -1; | |
2626 | rport->supported_classes = FC_COS_UNSPECIFIED; | |
43ca910a | 2627 | rport->dev_loss_tmo = fc_host->dev_loss_tmo; |
1da177e4 LT |
2628 | memcpy(&rport->node_name, &ids->node_name, sizeof(rport->node_name)); |
2629 | memcpy(&rport->port_name, &ids->port_name, sizeof(rport->port_name)); | |
2630 | rport->port_id = ids->port_id; | |
2631 | rport->roles = ids->roles; | |
2632 | rport->port_state = FC_PORTSTATE_ONLINE; | |
2633 | if (fci->f->dd_fcrport_size) | |
2634 | rport->dd_data = &rport[1]; | |
2635 | rport->channel = channel; | |
0f29b966 | 2636 | rport->fast_io_fail_tmo = -1; |
1da177e4 | 2637 | |
c4028958 DH |
2638 | INIT_DELAYED_WORK(&rport->dev_loss_work, fc_timeout_deleted_rport); |
2639 | INIT_DELAYED_WORK(&rport->fail_io_work, fc_timeout_fail_rport_io); | |
2640 | INIT_WORK(&rport->scan_work, fc_scsi_scan_rport); | |
2641 | INIT_WORK(&rport->stgt_delete_work, fc_starget_delete); | |
2642 | INIT_WORK(&rport->rport_delete_work, fc_rport_final_delete); | |
1da177e4 LT |
2643 | |
2644 | spin_lock_irqsave(shost->host_lock, flags); | |
2645 | ||
2646 | rport->number = fc_host->next_rport_number++; | |
a53eb5e0 | 2647 | if (rport->roles & FC_PORT_ROLE_FCP_TARGET) |
1da177e4 LT |
2648 | rport->scsi_target_id = fc_host->next_target_id++; |
2649 | else | |
2650 | rport->scsi_target_id = -1; | |
aedf3497 | 2651 | list_add_tail(&rport->peers, &fc_host->rports); |
3bdad7bd | 2652 | get_device(&shost->shost_gendev); /* for fc_host->rport list */ |
1da177e4 LT |
2653 | |
2654 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2655 | ||
2656 | dev = &rport->dev; | |
3bdad7bd JS |
2657 | device_initialize(dev); /* takes self reference */ |
2658 | dev->parent = get_device(&shost->shost_gendev); /* parent reference */ | |
1da177e4 | 2659 | dev->release = fc_rport_dev_release; |
71610f55 KS |
2660 | dev_set_name(dev, "rport-%d:%d-%d", |
2661 | shost->host_no, channel, rport->number); | |
1da177e4 LT |
2662 | transport_setup_device(dev); |
2663 | ||
2664 | error = device_add(dev); | |
2665 | if (error) { | |
2666 | printk(KERN_ERR "FC Remote Port device_add failed\n"); | |
2667 | goto delete_rport; | |
2668 | } | |
2669 | transport_add_device(dev); | |
2670 | transport_configure_device(dev); | |
2671 | ||
9e4f5e29 JS |
2672 | fc_bsg_rportadd(shost, rport); |
2673 | /* ignore any bsg add error - we just can't do sgio */ | |
2674 | ||
a53eb5e0 | 2675 | if (rport->roles & FC_PORT_ROLE_FCP_TARGET) { |
1da177e4 | 2676 | /* initiate a scan of the target */ |
aedf3497 | 2677 | rport->flags |= FC_RPORT_SCAN_PENDING; |
1da177e4 | 2678 | scsi_queue_work(shost, &rport->scan_work); |
aedf3497 | 2679 | } |
1da177e4 LT |
2680 | |
2681 | return rport; | |
2682 | ||
2683 | delete_rport: | |
2684 | transport_destroy_device(dev); | |
1da177e4 LT |
2685 | spin_lock_irqsave(shost->host_lock, flags); |
2686 | list_del(&rport->peers); | |
3bdad7bd | 2687 | put_device(&shost->shost_gendev); /* for fc_host->rport list */ |
1da177e4 LT |
2688 | spin_unlock_irqrestore(shost->host_lock, flags); |
2689 | put_device(dev->parent); | |
2690 | kfree(rport); | |
2691 | return NULL; | |
2692 | } | |
2693 | ||
2694 | /** | |
eb44820c | 2695 | * fc_remote_port_add - notify fc transport of the existence of a remote FC port. |
1da177e4 LT |
2696 | * @shost: scsi host the remote port is connected to. |
2697 | * @channel: Channel on shost port connected to. | |
2698 | * @ids: The world wide names, fc address, and FC4 port | |
2699 | * roles for the remote port. | |
2700 | * | |
2701 | * The LLDD calls this routine to notify the transport of the existence | |
2702 | * of a remote port. The LLDD provides the unique identifiers (wwpn,wwn) | |
2703 | * of the port, it's FC address (port_id), and the FC4 roles that are | |
2704 | * active for the port. | |
2705 | * | |
2706 | * For ports that are FCP targets (aka scsi targets), the FC transport | |
2707 | * maintains consistent target id bindings on behalf of the LLDD. | |
2708 | * A consistent target id binding is an assignment of a target id to | |
2709 | * a remote port identifier, which persists while the scsi host is | |
2710 | * attached. The remote port can disappear, then later reappear, and | |
2711 | * it's target id assignment remains the same. This allows for shifts | |
2712 | * in FC addressing (if binding by wwpn or wwnn) with no apparent | |
2713 | * changes to the scsi subsystem which is based on scsi host number and | |
2714 | * target id values. Bindings are only valid during the attachment of | |
2715 | * the scsi host. If the host detaches, then later re-attaches, target | |
2716 | * id bindings may change. | |
2717 | * | |
2718 | * This routine is responsible for returning a remote port structure. | |
2719 | * The routine will search the list of remote ports it maintains | |
2720 | * internally on behalf of consistent target id mappings. If found, the | |
2721 | * remote port structure will be reused. Otherwise, a new remote port | |
2722 | * structure will be allocated. | |
2723 | * | |
2724 | * Whenever a remote port is allocated, a new fc_remote_port class | |
2725 | * device is created. | |
2726 | * | |
2727 | * Should not be called from interrupt context. | |
2728 | * | |
2729 | * Notes: | |
2730 | * This routine assumes no locks are held on entry. | |
eb44820c | 2731 | */ |
1da177e4 LT |
2732 | struct fc_rport * |
2733 | fc_remote_port_add(struct Scsi_Host *shost, int channel, | |
2734 | struct fc_rport_identifiers *ids) | |
2735 | { | |
19a7b4ae | 2736 | struct fc_internal *fci = to_fc_internal(shost->transportt); |
aedf3497 | 2737 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
1da177e4 LT |
2738 | struct fc_rport *rport; |
2739 | unsigned long flags; | |
2740 | int match = 0; | |
2741 | ||
aedf3497 JS |
2742 | /* ensure any stgt delete functions are done */ |
2743 | fc_flush_work(shost); | |
2744 | ||
19a7b4ae JSEC |
2745 | /* |
2746 | * Search the list of "active" rports, for an rport that has been | |
2747 | * deleted, but we've held off the real delete while the target | |
2748 | * is in a "blocked" state. | |
2749 | */ | |
2750 | spin_lock_irqsave(shost->host_lock, flags); | |
2751 | ||
aedf3497 | 2752 | list_for_each_entry(rport, &fc_host->rports, peers) { |
19a7b4ae JSEC |
2753 | |
2754 | if ((rport->port_state == FC_PORTSTATE_BLOCKED) && | |
2755 | (rport->channel == channel)) { | |
2756 | ||
aedf3497 | 2757 | switch (fc_host->tgtid_bind_type) { |
19a7b4ae JSEC |
2758 | case FC_TGTID_BIND_BY_WWPN: |
2759 | case FC_TGTID_BIND_NONE: | |
2760 | if (rport->port_name == ids->port_name) | |
2761 | match = 1; | |
2762 | break; | |
2763 | case FC_TGTID_BIND_BY_WWNN: | |
2764 | if (rport->node_name == ids->node_name) | |
2765 | match = 1; | |
2766 | break; | |
2767 | case FC_TGTID_BIND_BY_ID: | |
2768 | if (rport->port_id == ids->port_id) | |
2769 | match = 1; | |
2770 | break; | |
2771 | } | |
2772 | ||
2773 | if (match) { | |
19a7b4ae JSEC |
2774 | |
2775 | memcpy(&rport->node_name, &ids->node_name, | |
2776 | sizeof(rport->node_name)); | |
2777 | memcpy(&rport->port_name, &ids->port_name, | |
2778 | sizeof(rport->port_name)); | |
2779 | rport->port_id = ids->port_id; | |
2780 | ||
2781 | rport->port_state = FC_PORTSTATE_ONLINE; | |
2782 | rport->roles = ids->roles; | |
2783 | ||
2784 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2785 | ||
2786 | if (fci->f->dd_fcrport_size) | |
2787 | memset(rport->dd_data, 0, | |
2788 | fci->f->dd_fcrport_size); | |
2789 | ||
2790 | /* | |
92740b24 JS |
2791 | * If we were not a target, cancel the |
2792 | * io terminate and rport timers, and | |
2793 | * we're done. | |
2794 | * | |
2795 | * If we were a target, but our new role | |
2796 | * doesn't indicate a target, leave the | |
2797 | * timers running expecting the role to | |
2798 | * change as the target fully logs in. If | |
2799 | * it doesn't, the target will be torn down. | |
2800 | * | |
2801 | * If we were a target, and our role shows | |
2802 | * we're still a target, cancel the timers | |
2803 | * and kick off a scan. | |
19a7b4ae | 2804 | */ |
19a7b4ae | 2805 | |
92740b24 JS |
2806 | /* was a target, not in roles */ |
2807 | if ((rport->scsi_target_id != -1) && | |
a53eb5e0 | 2808 | (!(ids->roles & FC_PORT_ROLE_FCP_TARGET))) |
92740b24 | 2809 | return rport; |
19a7b4ae JSEC |
2810 | |
2811 | /* | |
92740b24 JS |
2812 | * Stop the fail io and dev_loss timers. |
2813 | * If they flush, the port_state will | |
2814 | * be checked and will NOOP the function. | |
19a7b4ae | 2815 | */ |
0f29b966 JS |
2816 | if (!cancel_delayed_work(&rport->fail_io_work)) |
2817 | fc_flush_devloss(shost); | |
92740b24 | 2818 | if (!cancel_delayed_work(&rport->dev_loss_work)) |
aedf3497 JS |
2819 | fc_flush_devloss(shost); |
2820 | ||
2821 | spin_lock_irqsave(shost->host_lock, flags); | |
2822 | ||
fff9d40c | 2823 | rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT | |
4be98c0c JS |
2824 | FC_RPORT_DEVLOSS_PENDING | |
2825 | FC_RPORT_DEVLOSS_CALLBK_DONE); | |
19a7b4ae | 2826 | |
8fb2ef89 MC |
2827 | spin_unlock_irqrestore(shost->host_lock, flags); |
2828 | ||
92740b24 JS |
2829 | /* if target, initiate a scan */ |
2830 | if (rport->scsi_target_id != -1) { | |
5d9fb5cc MC |
2831 | scsi_target_unblock(&rport->dev, |
2832 | SDEV_RUNNING); | |
8fb2ef89 MC |
2833 | spin_lock_irqsave(shost->host_lock, |
2834 | flags); | |
92740b24 JS |
2835 | rport->flags |= FC_RPORT_SCAN_PENDING; |
2836 | scsi_queue_work(shost, | |
2837 | &rport->scan_work); | |
2838 | spin_unlock_irqrestore(shost->host_lock, | |
2839 | flags); | |
8fb2ef89 | 2840 | } |
a0785edf | 2841 | |
9e4f5e29 JS |
2842 | fc_bsg_goose_queue(rport); |
2843 | ||
19a7b4ae JSEC |
2844 | return rport; |
2845 | } | |
2846 | } | |
2847 | } | |
2848 | ||
92740b24 JS |
2849 | /* |
2850 | * Search the bindings array | |
2851 | * Note: if never a FCP target, you won't be on this list | |
2852 | */ | |
aedf3497 | 2853 | if (fc_host->tgtid_bind_type != FC_TGTID_BIND_NONE) { |
1da177e4 LT |
2854 | |
2855 | /* search for a matching consistent binding */ | |
2856 | ||
aedf3497 | 2857 | list_for_each_entry(rport, &fc_host->rport_bindings, |
1da177e4 LT |
2858 | peers) { |
2859 | if (rport->channel != channel) | |
2860 | continue; | |
2861 | ||
aedf3497 | 2862 | switch (fc_host->tgtid_bind_type) { |
1da177e4 LT |
2863 | case FC_TGTID_BIND_BY_WWPN: |
2864 | if (rport->port_name == ids->port_name) | |
2865 | match = 1; | |
2866 | break; | |
2867 | case FC_TGTID_BIND_BY_WWNN: | |
2868 | if (rport->node_name == ids->node_name) | |
2869 | match = 1; | |
2870 | break; | |
2871 | case FC_TGTID_BIND_BY_ID: | |
2872 | if (rport->port_id == ids->port_id) | |
2873 | match = 1; | |
2874 | break; | |
2875 | case FC_TGTID_BIND_NONE: /* to keep compiler happy */ | |
2876 | break; | |
2877 | } | |
2878 | ||
2879 | if (match) { | |
aedf3497 | 2880 | list_move_tail(&rport->peers, &fc_host->rports); |
1da177e4 LT |
2881 | break; |
2882 | } | |
2883 | } | |
2884 | ||
1da177e4 LT |
2885 | if (match) { |
2886 | memcpy(&rport->node_name, &ids->node_name, | |
2887 | sizeof(rport->node_name)); | |
2888 | memcpy(&rport->port_name, &ids->port_name, | |
2889 | sizeof(rport->port_name)); | |
2890 | rport->port_id = ids->port_id; | |
2891 | rport->roles = ids->roles; | |
2892 | rport->port_state = FC_PORTSTATE_ONLINE; | |
fff9d40c | 2893 | rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT; |
1da177e4 | 2894 | |
19a7b4ae JSEC |
2895 | if (fci->f->dd_fcrport_size) |
2896 | memset(rport->dd_data, 0, | |
2897 | fci->f->dd_fcrport_size); | |
8fb2ef89 MC |
2898 | spin_unlock_irqrestore(shost->host_lock, flags); |
2899 | ||
2900 | if (ids->roles & FC_PORT_ROLE_FCP_TARGET) { | |
5d9fb5cc | 2901 | scsi_target_unblock(&rport->dev, SDEV_RUNNING); |
19a7b4ae | 2902 | |
1da177e4 | 2903 | /* initiate a scan of the target */ |
8fb2ef89 | 2904 | spin_lock_irqsave(shost->host_lock, flags); |
aedf3497 | 2905 | rport->flags |= FC_RPORT_SCAN_PENDING; |
1da177e4 | 2906 | scsi_queue_work(shost, &rport->scan_work); |
a0785edf | 2907 | spin_unlock_irqrestore(shost->host_lock, flags); |
8fb2ef89 | 2908 | } |
1da177e4 LT |
2909 | return rport; |
2910 | } | |
2911 | } | |
2912 | ||
19a7b4ae JSEC |
2913 | spin_unlock_irqrestore(shost->host_lock, flags); |
2914 | ||
1da177e4 LT |
2915 | /* No consistent binding found - create new remote port entry */ |
2916 | rport = fc_rport_create(shost, channel, ids); | |
2917 | ||
2918 | return rport; | |
2919 | } | |
2920 | EXPORT_SYMBOL(fc_remote_port_add); | |
2921 | ||
1da177e4 LT |
2922 | |
2923 | /** | |
eb44820c | 2924 | * fc_remote_port_delete - notifies the fc transport that a remote port is no longer in existence. |
1da177e4 LT |
2925 | * @rport: The remote port that no longer exists |
2926 | * | |
2927 | * The LLDD calls this routine to notify the transport that a remote | |
2928 | * port is no longer part of the topology. Note: Although a port | |
2929 | * may no longer be part of the topology, it may persist in the remote | |
19a7b4ae | 2930 | * ports displayed by the fc_host. We do this under 2 conditions: |
eb44820c | 2931 | * 1) If the port was a scsi target, we delay its deletion by "blocking" it. |
19a7b4ae JSEC |
2932 | * This allows the port to temporarily disappear, then reappear without |
2933 | * disrupting the SCSI device tree attached to it. During the "blocked" | |
2934 | * period the port will still exist. | |
eb44820c | 2935 | * 2) If the port was a scsi target and disappears for longer than we |
19a7b4ae JSEC |
2936 | * expect, we'll delete the port and the tear down the SCSI device tree |
2937 | * attached to it. However, we want to semi-persist the target id assigned | |
2938 | * to that port if it eventually does exist. The port structure will | |
2939 | * remain (although with minimal information) so that the target id | |
2940 | * bindings remails. | |
1da177e4 LT |
2941 | * |
2942 | * If the remote port is not an FCP Target, it will be fully torn down | |
2943 | * and deallocated, including the fc_remote_port class device. | |
2944 | * | |
19a7b4ae JSEC |
2945 | * If the remote port is an FCP Target, the port will be placed in a |
2946 | * temporary blocked state. From the LLDD's perspective, the rport no | |
2947 | * longer exists. From the SCSI midlayer's perspective, the SCSI target | |
2948 | * exists, but all sdevs on it are blocked from further I/O. The following | |
eb44820c RL |
2949 | * is then expected. |
2950 | * | |
19a7b4ae JSEC |
2951 | * If the remote port does not return (signaled by a LLDD call to |
2952 | * fc_remote_port_add()) within the dev_loss_tmo timeout, then the | |
2953 | * scsi target is removed - killing all outstanding i/o and removing the | |
2954 | * scsi devices attached ot it. The port structure will be marked Not | |
2955 | * Present and be partially cleared, leaving only enough information to | |
2956 | * recognize the remote port relative to the scsi target id binding if | |
2957 | * it later appears. The port will remain as long as there is a valid | |
2958 | * binding (e.g. until the user changes the binding type or unloads the | |
2959 | * scsi host with the binding). | |
1da177e4 | 2960 | * |
19a7b4ae JSEC |
2961 | * If the remote port returns within the dev_loss_tmo value (and matches |
2962 | * according to the target id binding type), the port structure will be | |
2963 | * reused. If it is no longer a SCSI target, the target will be torn | |
2964 | * down. If it continues to be a SCSI target, then the target will be | |
2965 | * unblocked (allowing i/o to be resumed), and a scan will be activated | |
2966 | * to ensure that all luns are detected. | |
2967 | * | |
2968 | * Called from normal process context only - cannot be called from interrupt. | |
1da177e4 LT |
2969 | * |
2970 | * Notes: | |
2971 | * This routine assumes no locks are held on entry. | |
eb44820c | 2972 | */ |
1da177e4 LT |
2973 | void |
2974 | fc_remote_port_delete(struct fc_rport *rport) | |
2975 | { | |
aedf3497 | 2976 | struct Scsi_Host *shost = rport_to_shost(rport); |
36dd288f | 2977 | unsigned long timeout = rport->dev_loss_tmo; |
aedf3497 JS |
2978 | unsigned long flags; |
2979 | ||
2980 | /* | |
2981 | * No need to flush the fc_host work_q's, as all adds are synchronous. | |
2982 | * | |
2983 | * We do need to reclaim the rport scan work element, so eventually | |
2984 | * (in fc_rport_final_delete()) we'll flush the scsi host work_q if | |
2985 | * there's still a scan pending. | |
2986 | */ | |
2987 | ||
2988 | spin_lock_irqsave(shost->host_lock, flags); | |
1da177e4 | 2989 | |
92740b24 | 2990 | if (rport->port_state != FC_PORTSTATE_ONLINE) { |
aedf3497 | 2991 | spin_unlock_irqrestore(shost->host_lock, flags); |
1da177e4 LT |
2992 | return; |
2993 | } | |
2994 | ||
92740b24 JS |
2995 | /* |
2996 | * In the past, we if this was not an FCP-Target, we would | |
2997 | * unconditionally just jump to deleting the rport. | |
2998 | * However, rports can be used as node containers by the LLDD, | |
2999 | * and its not appropriate to just terminate the rport at the | |
3000 | * first sign of a loss in connectivity. The LLDD may want to | |
3001 | * send ELS traffic to re-validate the login. If the rport is | |
3002 | * immediately deleted, it makes it inappropriate for a node | |
3003 | * container. | |
3004 | * So... we now unconditionally wait dev_loss_tmo before | |
3005 | * destroying an rport. | |
3006 | */ | |
3007 | ||
aedf3497 JS |
3008 | rport->port_state = FC_PORTSTATE_BLOCKED; |
3009 | ||
3010 | rport->flags |= FC_RPORT_DEVLOSS_PENDING; | |
3011 | ||
3012 | spin_unlock_irqrestore(shost->host_lock, flags); | |
3013 | ||
7525236d FT |
3014 | if (rport->roles & FC_PORT_ROLE_FCP_INITIATOR && |
3015 | shost->active_mode & MODE_TARGET) | |
3016 | fc_tgt_it_nexus_destroy(shost, (unsigned long)rport); | |
3017 | ||
19a7b4ae | 3018 | scsi_target_block(&rport->dev); |
1da177e4 | 3019 | |
0f29b966 JS |
3020 | /* see if we need to kill io faster than waiting for device loss */ |
3021 | if ((rport->fast_io_fail_tmo != -1) && | |
fff9d40c | 3022 | (rport->fast_io_fail_tmo < timeout)) |
0f29b966 JS |
3023 | fc_queue_devloss_work(shost, &rport->fail_io_work, |
3024 | rport->fast_io_fail_tmo * HZ); | |
3025 | ||
19a7b4ae | 3026 | /* cap the length the devices can be blocked until they are deleted */ |
aedf3497 | 3027 | fc_queue_devloss_work(shost, &rport->dev_loss_work, timeout * HZ); |
1da177e4 LT |
3028 | } |
3029 | EXPORT_SYMBOL(fc_remote_port_delete); | |
3030 | ||
3031 | /** | |
eb44820c | 3032 | * fc_remote_port_rolechg - notifies the fc transport that the roles on a remote may have changed. |
1da177e4 | 3033 | * @rport: The remote port that changed. |
eb44820c | 3034 | * @roles: New roles for this port. |
1da177e4 | 3035 | * |
eb44820c RL |
3036 | * Description: The LLDD calls this routine to notify the transport that the |
3037 | * roles on a remote port may have changed. The largest effect of this is | |
1da177e4 LT |
3038 | * if a port now becomes a FCP Target, it must be allocated a |
3039 | * scsi target id. If the port is no longer a FCP target, any | |
3040 | * scsi target id value assigned to it will persist in case the | |
3041 | * role changes back to include FCP Target. No changes in the scsi | |
3042 | * midlayer will be invoked if the role changes (in the expectation | |
3043 | * that the role will be resumed. If it doesn't normal error processing | |
3044 | * will take place). | |
3045 | * | |
3046 | * Should not be called from interrupt context. | |
3047 | * | |
3048 | * Notes: | |
3049 | * This routine assumes no locks are held on entry. | |
eb44820c | 3050 | */ |
1da177e4 LT |
3051 | void |
3052 | fc_remote_port_rolechg(struct fc_rport *rport, u32 roles) | |
3053 | { | |
3054 | struct Scsi_Host *shost = rport_to_shost(rport); | |
aedf3497 | 3055 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
1da177e4 LT |
3056 | unsigned long flags; |
3057 | int create = 0; | |
7525236d | 3058 | int ret; |
1da177e4 | 3059 | |
1da177e4 | 3060 | spin_lock_irqsave(shost->host_lock, flags); |
a53eb5e0 | 3061 | if (roles & FC_PORT_ROLE_FCP_TARGET) { |
19a7b4ae JSEC |
3062 | if (rport->scsi_target_id == -1) { |
3063 | rport->scsi_target_id = fc_host->next_target_id++; | |
3064 | create = 1; | |
a53eb5e0 | 3065 | } else if (!(rport->roles & FC_PORT_ROLE_FCP_TARGET)) |
19a7b4ae | 3066 | create = 1; |
7525236d FT |
3067 | } else if (shost->active_mode & MODE_TARGET) { |
3068 | ret = fc_tgt_it_nexus_create(shost, (unsigned long)rport, | |
3069 | (char *)&rport->node_name); | |
3070 | if (ret) | |
3071 | printk(KERN_ERR "FC Remore Port tgt nexus failed %d\n", | |
3072 | ret); | |
1da177e4 | 3073 | } |
1da177e4 | 3074 | |
19a7b4ae JSEC |
3075 | rport->roles = roles; |
3076 | ||
aedf3497 JS |
3077 | spin_unlock_irqrestore(shost->host_lock, flags); |
3078 | ||
19a7b4ae JSEC |
3079 | if (create) { |
3080 | /* | |
3081 | * There may have been a delete timer running on the | |
3082 | * port. Ensure that it is cancelled as we now know | |
3083 | * the port is an FCP Target. | |
3084 | * Note: we know the rport is exists and in an online | |
3085 | * state as the LLDD would not have had an rport | |
3086 | * reference to pass us. | |
3087 | * | |
3088 | * Take no action on the del_timer failure as the state | |
3089 | * machine state change will validate the | |
3090 | * transaction. | |
3091 | */ | |
0f29b966 JS |
3092 | if (!cancel_delayed_work(&rport->fail_io_work)) |
3093 | fc_flush_devloss(shost); | |
19a7b4ae | 3094 | if (!cancel_delayed_work(&rport->dev_loss_work)) |
aedf3497 JS |
3095 | fc_flush_devloss(shost); |
3096 | ||
3097 | spin_lock_irqsave(shost->host_lock, flags); | |
fff9d40c | 3098 | rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT | |
0eecee41 JS |
3099 | FC_RPORT_DEVLOSS_PENDING | |
3100 | FC_RPORT_DEVLOSS_CALLBK_DONE); | |
aedf3497 JS |
3101 | spin_unlock_irqrestore(shost->host_lock, flags); |
3102 | ||
3103 | /* ensure any stgt delete functions are done */ | |
3104 | fc_flush_work(shost); | |
19a7b4ae | 3105 | |
5d9fb5cc | 3106 | scsi_target_unblock(&rport->dev, SDEV_RUNNING); |
1da177e4 | 3107 | /* initiate a scan of the target */ |
aedf3497 JS |
3108 | spin_lock_irqsave(shost->host_lock, flags); |
3109 | rport->flags |= FC_RPORT_SCAN_PENDING; | |
1da177e4 | 3110 | scsi_queue_work(shost, &rport->scan_work); |
aedf3497 | 3111 | spin_unlock_irqrestore(shost->host_lock, flags); |
19a7b4ae | 3112 | } |
1da177e4 LT |
3113 | } |
3114 | EXPORT_SYMBOL(fc_remote_port_rolechg); | |
3115 | ||
3116 | /** | |
eb44820c | 3117 | * fc_timeout_deleted_rport - Timeout handler for a deleted remote port. |
92740b24 | 3118 | * @work: rport target that failed to reappear in the allotted time. |
eb44820c RL |
3119 | * |
3120 | * Description: An attempt to delete a remote port blocks, and if it fails | |
3121 | * to return in the allotted time this gets called. | |
3122 | */ | |
1da177e4 | 3123 | static void |
c4028958 | 3124 | fc_timeout_deleted_rport(struct work_struct *work) |
1da177e4 | 3125 | { |
c4028958 DH |
3126 | struct fc_rport *rport = |
3127 | container_of(work, struct fc_rport, dev_loss_work.work); | |
19a7b4ae | 3128 | struct Scsi_Host *shost = rport_to_shost(rport); |
4be98c0c | 3129 | struct fc_internal *i = to_fc_internal(shost->transportt); |
aedf3497 | 3130 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
19a7b4ae | 3131 | unsigned long flags; |
8798a694 | 3132 | int do_callback = 0; |
1da177e4 | 3133 | |
19a7b4ae | 3134 | spin_lock_irqsave(shost->host_lock, flags); |
1da177e4 | 3135 | |
aedf3497 JS |
3136 | rport->flags &= ~FC_RPORT_DEVLOSS_PENDING; |
3137 | ||
1da177e4 | 3138 | /* |
92740b24 JS |
3139 | * If the port is ONLINE, then it came back. If it was a SCSI |
3140 | * target, validate it still is. If not, tear down the | |
3141 | * scsi_target on it. | |
1da177e4 | 3142 | */ |
aedf3497 | 3143 | if ((rport->port_state == FC_PORTSTATE_ONLINE) && |
92740b24 | 3144 | (rport->scsi_target_id != -1) && |
a53eb5e0 | 3145 | !(rport->roles & FC_PORT_ROLE_FCP_TARGET)) { |
19a7b4ae | 3146 | dev_printk(KERN_ERR, &rport->dev, |
aedf3497 JS |
3147 | "blocked FC remote port time out: no longer" |
3148 | " a FCP target, removing starget\n"); | |
aedf3497 | 3149 | spin_unlock_irqrestore(shost->host_lock, flags); |
5d9fb5cc | 3150 | scsi_target_unblock(&rport->dev, SDEV_TRANSPORT_OFFLINE); |
a0785edf | 3151 | fc_queue_work(shost, &rport->stgt_delete_work); |
19a7b4ae JSEC |
3152 | return; |
3153 | } | |
1da177e4 | 3154 | |
92740b24 | 3155 | /* NOOP state - we're flushing workq's */ |
19a7b4ae JSEC |
3156 | if (rport->port_state != FC_PORTSTATE_BLOCKED) { |
3157 | spin_unlock_irqrestore(shost->host_lock, flags); | |
3158 | dev_printk(KERN_ERR, &rport->dev, | |
92740b24 JS |
3159 | "blocked FC remote port time out: leaving" |
3160 | " rport%s alone\n", | |
3161 | (rport->scsi_target_id != -1) ? " and starget" : ""); | |
19a7b4ae JSEC |
3162 | return; |
3163 | } | |
1da177e4 | 3164 | |
92740b24 JS |
3165 | if ((fc_host->tgtid_bind_type == FC_TGTID_BIND_NONE) || |
3166 | (rport->scsi_target_id == -1)) { | |
aedf3497 JS |
3167 | list_del(&rport->peers); |
3168 | rport->port_state = FC_PORTSTATE_DELETED; | |
19a7b4ae | 3169 | dev_printk(KERN_ERR, &rport->dev, |
92740b24 JS |
3170 | "blocked FC remote port time out: removing" |
3171 | " rport%s\n", | |
3172 | (rport->scsi_target_id != -1) ? " and starget" : ""); | |
aedf3497 JS |
3173 | fc_queue_work(shost, &rport->rport_delete_work); |
3174 | spin_unlock_irqrestore(shost->host_lock, flags); | |
19a7b4ae JSEC |
3175 | return; |
3176 | } | |
1da177e4 | 3177 | |
19a7b4ae JSEC |
3178 | dev_printk(KERN_ERR, &rport->dev, |
3179 | "blocked FC remote port time out: removing target and " | |
3180 | "saving binding\n"); | |
3181 | ||
aedf3497 | 3182 | list_move_tail(&rport->peers, &fc_host->rport_bindings); |
1da177e4 LT |
3183 | |
3184 | /* | |
19a7b4ae JSEC |
3185 | * Note: We do not remove or clear the hostdata area. This allows |
3186 | * host-specific target data to persist along with the | |
3187 | * scsi_target_id. It's up to the host to manage it's hostdata area. | |
1da177e4 | 3188 | */ |
1da177e4 | 3189 | |
19a7b4ae JSEC |
3190 | /* |
3191 | * Reinitialize port attributes that may change if the port comes back. | |
3192 | */ | |
3193 | rport->maxframe_size = -1; | |
3194 | rport->supported_classes = FC_COS_UNSPECIFIED; | |
a53eb5e0 | 3195 | rport->roles = FC_PORT_ROLE_UNKNOWN; |
aedf3497 | 3196 | rport->port_state = FC_PORTSTATE_NOTPRESENT; |
fff9d40c | 3197 | rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT; |
1da177e4 | 3198 | |
f78badb1 JS |
3199 | /* |
3200 | * Pre-emptively kill I/O rather than waiting for the work queue | |
3201 | * item to teardown the starget. (FCOE libFC folks prefer this | |
3202 | * and to have the rport_port_id still set when it's done). | |
3203 | */ | |
3204 | spin_unlock_irqrestore(shost->host_lock, flags); | |
3205 | fc_terminate_rport_io(rport); | |
3206 | ||
8798a694 MR |
3207 | spin_lock_irqsave(shost->host_lock, flags); |
3208 | ||
3209 | if (rport->port_state == FC_PORTSTATE_NOTPRESENT) { /* still missing */ | |
f78badb1 | 3210 | |
8798a694 MR |
3211 | /* remove the identifiers that aren't used in the consisting binding */ |
3212 | switch (fc_host->tgtid_bind_type) { | |
3213 | case FC_TGTID_BIND_BY_WWPN: | |
3214 | rport->node_name = -1; | |
3215 | rport->port_id = -1; | |
3216 | break; | |
3217 | case FC_TGTID_BIND_BY_WWNN: | |
3218 | rport->port_name = -1; | |
3219 | rport->port_id = -1; | |
3220 | break; | |
3221 | case FC_TGTID_BIND_BY_ID: | |
3222 | rport->node_name = -1; | |
3223 | rport->port_name = -1; | |
3224 | break; | |
3225 | case FC_TGTID_BIND_NONE: /* to keep compiler happy */ | |
3226 | break; | |
3227 | } | |
3228 | ||
3229 | /* | |
3230 | * As this only occurs if the remote port (scsi target) | |
3231 | * went away and didn't come back - we'll remove | |
3232 | * all attached scsi devices. | |
3233 | */ | |
3234 | rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE; | |
3235 | fc_queue_work(shost, &rport->stgt_delete_work); | |
3236 | ||
3237 | do_callback = 1; | |
19a7b4ae JSEC |
3238 | } |
3239 | ||
8798a694 | 3240 | spin_unlock_irqrestore(shost->host_lock, flags); |
4be98c0c JS |
3241 | |
3242 | /* | |
3243 | * Notify the driver that the rport is now dead. The LLDD will | |
3244 | * also guarantee that any communication to the rport is terminated | |
3245 | * | |
3246 | * Note: we set the CALLBK_DONE flag above to correspond | |
3247 | */ | |
8798a694 | 3248 | if (do_callback && i->f->dev_loss_tmo_callbk) |
4be98c0c | 3249 | i->f->dev_loss_tmo_callbk(rport); |
1da177e4 | 3250 | } |
1da177e4 | 3251 | |
4be98c0c | 3252 | |
0f29b966 | 3253 | /** |
eb44820c | 3254 | * fc_timeout_fail_rport_io - Timeout handler for a fast io failing on a disconnected SCSI target. |
c4028958 | 3255 | * @work: rport to terminate io on. |
0f29b966 JS |
3256 | * |
3257 | * Notes: Only requests the failure of the io, not that all are flushed | |
3258 | * prior to returning. | |
eb44820c | 3259 | */ |
0f29b966 | 3260 | static void |
c4028958 | 3261 | fc_timeout_fail_rport_io(struct work_struct *work) |
0f29b966 | 3262 | { |
c4028958 DH |
3263 | struct fc_rport *rport = |
3264 | container_of(work, struct fc_rport, fail_io_work.work); | |
0f29b966 JS |
3265 | |
3266 | if (rport->port_state != FC_PORTSTATE_BLOCKED) | |
3267 | return; | |
3268 | ||
fff9d40c MC |
3269 | rport->flags |= FC_RPORT_FAST_FAIL_TIMEDOUT; |
3270 | fc_terminate_rport_io(rport); | |
0f29b966 JS |
3271 | } |
3272 | ||
1da177e4 LT |
3273 | /** |
3274 | * fc_scsi_scan_rport - called to perform a scsi scan on a remote port. | |
c4028958 | 3275 | * @work: remote port to be scanned. |
eb44820c | 3276 | */ |
1da177e4 | 3277 | static void |
c4028958 | 3278 | fc_scsi_scan_rport(struct work_struct *work) |
1da177e4 | 3279 | { |
c4028958 DH |
3280 | struct fc_rport *rport = |
3281 | container_of(work, struct fc_rport, scan_work); | |
aedf3497 | 3282 | struct Scsi_Host *shost = rport_to_shost(rport); |
03f002f7 | 3283 | struct fc_internal *i = to_fc_internal(shost->transportt); |
42e33148 JSEC |
3284 | unsigned long flags; |
3285 | ||
aedf3497 | 3286 | if ((rport->port_state == FC_PORTSTATE_ONLINE) && |
03f002f7 CS |
3287 | (rport->roles & FC_PORT_ROLE_FCP_TARGET) && |
3288 | !(i->f->disable_target_scan)) { | |
aedf3497 JS |
3289 | scsi_scan_target(&rport->dev, rport->channel, |
3290 | rport->scsi_target_id, SCAN_WILD_CARD, 1); | |
42e33148 | 3291 | } |
aedf3497 JS |
3292 | |
3293 | spin_lock_irqsave(shost->host_lock, flags); | |
3294 | rport->flags &= ~FC_RPORT_SCAN_PENDING; | |
42e33148 JSEC |
3295 | spin_unlock_irqrestore(shost->host_lock, flags); |
3296 | } | |
3297 | ||
65d430fa CS |
3298 | /** |
3299 | * fc_block_scsi_eh - Block SCSI eh thread for blocked fc_rport | |
3300 | * @cmnd: SCSI command that scsi_eh is trying to recover | |
3301 | * | |
3302 | * This routine can be called from a FC LLD scsi_eh callback. It | |
3303 | * blocks the scsi_eh thread until the fc_rport leaves the | |
2f2eb587 CS |
3304 | * FC_PORTSTATE_BLOCKED, or the fast_io_fail_tmo fires. This is |
3305 | * necessary to avoid the scsi_eh failing recovery actions for blocked | |
3306 | * rports which would lead to offlined SCSI devices. | |
3307 | * | |
3308 | * Returns: 0 if the fc_rport left the state FC_PORTSTATE_BLOCKED. | |
3309 | * FAST_IO_FAIL if the fast_io_fail_tmo fired, this should be | |
3310 | * passed back to scsi_eh. | |
65d430fa | 3311 | */ |
2f2eb587 | 3312 | int fc_block_scsi_eh(struct scsi_cmnd *cmnd) |
65d430fa CS |
3313 | { |
3314 | struct Scsi_Host *shost = cmnd->device->host; | |
3315 | struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); | |
3316 | unsigned long flags; | |
3317 | ||
3318 | spin_lock_irqsave(shost->host_lock, flags); | |
2f2eb587 CS |
3319 | while (rport->port_state == FC_PORTSTATE_BLOCKED && |
3320 | !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)) { | |
65d430fa CS |
3321 | spin_unlock_irqrestore(shost->host_lock, flags); |
3322 | msleep(1000); | |
3323 | spin_lock_irqsave(shost->host_lock, flags); | |
3324 | } | |
3325 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2f2eb587 CS |
3326 | |
3327 | if (rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT) | |
3328 | return FAST_IO_FAIL; | |
3329 | ||
3330 | return 0; | |
65d430fa CS |
3331 | } |
3332 | EXPORT_SYMBOL(fc_block_scsi_eh); | |
42e33148 | 3333 | |
a53eb5e0 | 3334 | /** |
a30c3f69 | 3335 | * fc_vport_setup - allocates and creates a FC virtual port. |
a53eb5e0 JS |
3336 | * @shost: scsi host the virtual port is connected to. |
3337 | * @channel: Channel on shost port connected to. | |
3338 | * @pdev: parent device for vport | |
3339 | * @ids: The world wide names, FC4 port roles, etc for | |
3340 | * the virtual port. | |
3341 | * @ret_vport: The pointer to the created vport. | |
3342 | * | |
3343 | * Allocates and creates the vport structure, calls the parent host | |
3344 | * to instantiate the vport, the completes w/ class and sysfs creation. | |
3345 | * | |
3346 | * Notes: | |
3347 | * This routine assumes no locks are held on entry. | |
eb44820c | 3348 | */ |
a53eb5e0 | 3349 | static int |
a30c3f69 | 3350 | fc_vport_setup(struct Scsi_Host *shost, int channel, struct device *pdev, |
a53eb5e0 JS |
3351 | struct fc_vport_identifiers *ids, struct fc_vport **ret_vport) |
3352 | { | |
3353 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); | |
3354 | struct fc_internal *fci = to_fc_internal(shost->transportt); | |
3355 | struct fc_vport *vport; | |
3356 | struct device *dev; | |
3357 | unsigned long flags; | |
3358 | size_t size; | |
3359 | int error; | |
3360 | ||
3361 | *ret_vport = NULL; | |
3362 | ||
3363 | if ( ! fci->f->vport_create) | |
3364 | return -ENOENT; | |
3365 | ||
3366 | size = (sizeof(struct fc_vport) + fci->f->dd_fcvport_size); | |
3367 | vport = kzalloc(size, GFP_KERNEL); | |
3368 | if (unlikely(!vport)) { | |
cadbd4a5 | 3369 | printk(KERN_ERR "%s: allocation failure\n", __func__); |
a53eb5e0 JS |
3370 | return -ENOMEM; |
3371 | } | |
3372 | ||
3373 | vport->vport_state = FC_VPORT_UNKNOWN; | |
3374 | vport->vport_last_state = FC_VPORT_UNKNOWN; | |
3375 | vport->node_name = ids->node_name; | |
3376 | vport->port_name = ids->port_name; | |
3377 | vport->roles = ids->roles; | |
3378 | vport->vport_type = ids->vport_type; | |
3379 | if (fci->f->dd_fcvport_size) | |
3380 | vport->dd_data = &vport[1]; | |
3381 | vport->shost = shost; | |
3382 | vport->channel = channel; | |
3383 | vport->flags = FC_VPORT_CREATING; | |
9ef3e4a4 | 3384 | INIT_WORK(&vport->vport_delete_work, fc_vport_sched_delete); |
a53eb5e0 JS |
3385 | |
3386 | spin_lock_irqsave(shost->host_lock, flags); | |
3387 | ||
3388 | if (fc_host->npiv_vports_inuse >= fc_host->max_npiv_vports) { | |
3389 | spin_unlock_irqrestore(shost->host_lock, flags); | |
3390 | kfree(vport); | |
3391 | return -ENOSPC; | |
3392 | } | |
3393 | fc_host->npiv_vports_inuse++; | |
3394 | vport->number = fc_host->next_vport_number++; | |
3395 | list_add_tail(&vport->peers, &fc_host->vports); | |
3396 | get_device(&shost->shost_gendev); /* for fc_host->vport list */ | |
3397 | ||
3398 | spin_unlock_irqrestore(shost->host_lock, flags); | |
3399 | ||
3400 | dev = &vport->dev; | |
3401 | device_initialize(dev); /* takes self reference */ | |
3402 | dev->parent = get_device(pdev); /* takes parent reference */ | |
3403 | dev->release = fc_vport_dev_release; | |
71610f55 KS |
3404 | dev_set_name(dev, "vport-%d:%d-%d", |
3405 | shost->host_no, channel, vport->number); | |
a53eb5e0 JS |
3406 | transport_setup_device(dev); |
3407 | ||
3408 | error = device_add(dev); | |
3409 | if (error) { | |
3410 | printk(KERN_ERR "FC Virtual Port device_add failed\n"); | |
3411 | goto delete_vport; | |
3412 | } | |
3413 | transport_add_device(dev); | |
3414 | transport_configure_device(dev); | |
3415 | ||
3416 | error = fci->f->vport_create(vport, ids->disable); | |
3417 | if (error) { | |
3418 | printk(KERN_ERR "FC Virtual Port LLDD Create failed\n"); | |
3419 | goto delete_vport_all; | |
3420 | } | |
3421 | ||
3422 | /* | |
3423 | * if the parent isn't the physical adapter's Scsi_Host, ensure | |
3424 | * the Scsi_Host at least contains ia symlink to the vport. | |
3425 | */ | |
3426 | if (pdev != &shost->shost_gendev) { | |
3427 | error = sysfs_create_link(&shost->shost_gendev.kobj, | |
71610f55 | 3428 | &dev->kobj, dev_name(dev)); |
a53eb5e0 JS |
3429 | if (error) |
3430 | printk(KERN_ERR | |
3431 | "%s: Cannot create vport symlinks for " | |
3432 | "%s, err=%d\n", | |
71610f55 | 3433 | __func__, dev_name(dev), error); |
a53eb5e0 JS |
3434 | } |
3435 | spin_lock_irqsave(shost->host_lock, flags); | |
3436 | vport->flags &= ~FC_VPORT_CREATING; | |
3437 | spin_unlock_irqrestore(shost->host_lock, flags); | |
3438 | ||
3439 | dev_printk(KERN_NOTICE, pdev, | |
71610f55 | 3440 | "%s created via shost%d channel %d\n", dev_name(dev), |
a53eb5e0 JS |
3441 | shost->host_no, channel); |
3442 | ||
3443 | *ret_vport = vport; | |
3444 | ||
3445 | return 0; | |
3446 | ||
3447 | delete_vport_all: | |
3448 | transport_remove_device(dev); | |
3449 | device_del(dev); | |
3450 | delete_vport: | |
3451 | transport_destroy_device(dev); | |
3452 | spin_lock_irqsave(shost->host_lock, flags); | |
3453 | list_del(&vport->peers); | |
3454 | put_device(&shost->shost_gendev); /* for fc_host->vport list */ | |
3455 | fc_host->npiv_vports_inuse--; | |
3456 | spin_unlock_irqrestore(shost->host_lock, flags); | |
3457 | put_device(dev->parent); | |
3458 | kfree(vport); | |
3459 | ||
3460 | return error; | |
3461 | } | |
3462 | ||
a30c3f69 AV |
3463 | /** |
3464 | * fc_vport_create - Admin App or LLDD requests creation of a vport | |
3465 | * @shost: scsi host the virtual port is connected to. | |
3466 | * @channel: channel on shost port connected to. | |
3467 | * @ids: The world wide names, FC4 port roles, etc for | |
3468 | * the virtual port. | |
3469 | * | |
3470 | * Notes: | |
3471 | * This routine assumes no locks are held on entry. | |
3472 | */ | |
3473 | struct fc_vport * | |
3474 | fc_vport_create(struct Scsi_Host *shost, int channel, | |
3475 | struct fc_vport_identifiers *ids) | |
3476 | { | |
3477 | int stat; | |
3478 | struct fc_vport *vport; | |
3479 | ||
3480 | stat = fc_vport_setup(shost, channel, &shost->shost_gendev, | |
3481 | ids, &vport); | |
3482 | return stat ? NULL : vport; | |
3483 | } | |
3484 | EXPORT_SYMBOL(fc_vport_create); | |
a53eb5e0 JS |
3485 | |
3486 | /** | |
3487 | * fc_vport_terminate - Admin App or LLDD requests termination of a vport | |
3488 | * @vport: fc_vport to be terminated | |
3489 | * | |
3490 | * Calls the LLDD vport_delete() function, then deallocates and removes | |
3491 | * the vport from the shost and object tree. | |
3492 | * | |
3493 | * Notes: | |
3494 | * This routine assumes no locks are held on entry. | |
eb44820c | 3495 | */ |
a53eb5e0 JS |
3496 | int |
3497 | fc_vport_terminate(struct fc_vport *vport) | |
3498 | { | |
3499 | struct Scsi_Host *shost = vport_to_shost(vport); | |
3500 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); | |
3501 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
3502 | struct device *dev = &vport->dev; | |
3503 | unsigned long flags; | |
3504 | int stat; | |
3505 | ||
a53eb5e0 JS |
3506 | if (i->f->vport_delete) |
3507 | stat = i->f->vport_delete(vport); | |
3508 | else | |
3509 | stat = -ENOENT; | |
3510 | ||
3511 | spin_lock_irqsave(shost->host_lock, flags); | |
3512 | vport->flags &= ~FC_VPORT_DELETING; | |
3513 | if (!stat) { | |
3514 | vport->flags |= FC_VPORT_DELETED; | |
3515 | list_del(&vport->peers); | |
3516 | fc_host->npiv_vports_inuse--; | |
3517 | put_device(&shost->shost_gendev); /* for fc_host->vport list */ | |
3518 | } | |
3519 | spin_unlock_irqrestore(shost->host_lock, flags); | |
3520 | ||
3521 | if (stat) | |
3522 | return stat; | |
3523 | ||
3524 | if (dev->parent != &shost->shost_gendev) | |
71610f55 | 3525 | sysfs_remove_link(&shost->shost_gendev.kobj, dev_name(dev)); |
a53eb5e0 JS |
3526 | transport_remove_device(dev); |
3527 | device_del(dev); | |
3528 | transport_destroy_device(dev); | |
3529 | ||
3530 | /* | |
3531 | * Removing our self-reference should mean our | |
3532 | * release function gets called, which will drop the remaining | |
3533 | * parent reference and free the data structure. | |
3534 | */ | |
3535 | put_device(dev); /* for self-reference */ | |
3536 | ||
3537 | return 0; /* SUCCESS */ | |
3538 | } | |
3539 | EXPORT_SYMBOL(fc_vport_terminate); | |
3540 | ||
9ef3e4a4 JS |
3541 | /** |
3542 | * fc_vport_sched_delete - workq-based delete request for a vport | |
9ef3e4a4 | 3543 | * @work: vport to be deleted. |
eb44820c | 3544 | */ |
9ef3e4a4 JS |
3545 | static void |
3546 | fc_vport_sched_delete(struct work_struct *work) | |
3547 | { | |
3548 | struct fc_vport *vport = | |
3549 | container_of(work, struct fc_vport, vport_delete_work); | |
3550 | int stat; | |
3551 | ||
3552 | stat = fc_vport_terminate(vport); | |
3553 | if (stat) | |
3554 | dev_printk(KERN_ERR, vport->dev.parent, | |
3555 | "%s: %s could not be deleted created via " | |
cadbd4a5 | 3556 | "shost%d channel %d - error %d\n", __func__, |
71610f55 | 3557 | dev_name(&vport->dev), vport->shost->host_no, |
9ef3e4a4 JS |
3558 | vport->channel, stat); |
3559 | } | |
3560 | ||
a53eb5e0 | 3561 | |
9e4f5e29 JS |
3562 | /* |
3563 | * BSG support | |
3564 | */ | |
3565 | ||
3566 | ||
3567 | /** | |
3568 | * fc_destroy_bsgjob - routine to teardown/delete a fc bsg job | |
3569 | * @job: fc_bsg_job that is to be torn down | |
3570 | */ | |
3571 | static void | |
3572 | fc_destroy_bsgjob(struct fc_bsg_job *job) | |
3573 | { | |
3574 | unsigned long flags; | |
3575 | ||
3576 | spin_lock_irqsave(&job->job_lock, flags); | |
3577 | if (job->ref_cnt) { | |
3578 | spin_unlock_irqrestore(&job->job_lock, flags); | |
3579 | return; | |
3580 | } | |
3581 | spin_unlock_irqrestore(&job->job_lock, flags); | |
3582 | ||
3583 | put_device(job->dev); /* release reference for the request */ | |
3584 | ||
3585 | kfree(job->request_payload.sg_list); | |
3586 | kfree(job->reply_payload.sg_list); | |
3587 | kfree(job); | |
3588 | } | |
3589 | ||
9e4f5e29 JS |
3590 | /** |
3591 | * fc_bsg_jobdone - completion routine for bsg requests that the LLD has | |
3592 | * completed | |
3593 | * @job: fc_bsg_job that is complete | |
3594 | */ | |
3595 | static void | |
3596 | fc_bsg_jobdone(struct fc_bsg_job *job) | |
3597 | { | |
3598 | struct request *req = job->req; | |
3599 | struct request *rsp = req->next_rq; | |
9e4f5e29 JS |
3600 | int err; |
3601 | ||
9e4f5e29 | 3602 | err = job->req->errors = job->reply->result; |
b5c6f776 | 3603 | |
9e4f5e29 JS |
3604 | if (err < 0) |
3605 | /* we're only returning the result field in the reply */ | |
3606 | job->req->sense_len = sizeof(uint32_t); | |
3607 | else | |
3608 | job->req->sense_len = job->reply_len; | |
3609 | ||
3610 | /* we assume all request payload was transferred, residual == 0 */ | |
3611 | req->resid_len = 0; | |
3612 | ||
3613 | if (rsp) { | |
3614 | WARN_ON(job->reply->reply_payload_rcv_len > rsp->resid_len); | |
3615 | ||
3616 | /* set reply (bidi) residual */ | |
3617 | rsp->resid_len -= min(job->reply->reply_payload_rcv_len, | |
3618 | rsp->resid_len); | |
3619 | } | |
b5c6f776 GM |
3620 | blk_complete_request(req); |
3621 | } | |
3622 | ||
3623 | /** | |
3624 | * fc_bsg_softirq_done - softirq done routine for destroying the bsg requests | |
fe5d20c8 | 3625 | * @rq: BSG request that holds the job to be destroyed |
b5c6f776 GM |
3626 | */ |
3627 | static void fc_bsg_softirq_done(struct request *rq) | |
3628 | { | |
3629 | struct fc_bsg_job *job = rq->special; | |
3630 | unsigned long flags; | |
9e4f5e29 | 3631 | |
b5c6f776 GM |
3632 | spin_lock_irqsave(&job->job_lock, flags); |
3633 | job->state_flags |= FC_RQST_STATE_DONE; | |
3634 | job->ref_cnt--; | |
3635 | spin_unlock_irqrestore(&job->job_lock, flags); | |
9e4f5e29 | 3636 | |
b5c6f776 | 3637 | blk_end_request_all(rq, rq->errors); |
9e4f5e29 JS |
3638 | fc_destroy_bsgjob(job); |
3639 | } | |
3640 | ||
9e4f5e29 JS |
3641 | /** |
3642 | * fc_bsg_job_timeout - handler for when a bsg request timesout | |
3643 | * @req: request that timed out | |
3644 | */ | |
3645 | static enum blk_eh_timer_return | |
3646 | fc_bsg_job_timeout(struct request *req) | |
3647 | { | |
3648 | struct fc_bsg_job *job = (void *) req->special; | |
3649 | struct Scsi_Host *shost = job->shost; | |
3650 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
3651 | unsigned long flags; | |
3652 | int err = 0, done = 0; | |
3653 | ||
3654 | if (job->rport && job->rport->port_state == FC_PORTSTATE_BLOCKED) | |
3655 | return BLK_EH_RESET_TIMER; | |
3656 | ||
3657 | spin_lock_irqsave(&job->job_lock, flags); | |
3658 | if (job->state_flags & FC_RQST_STATE_DONE) | |
3659 | done = 1; | |
3660 | else | |
3661 | job->ref_cnt++; | |
3662 | spin_unlock_irqrestore(&job->job_lock, flags); | |
3663 | ||
3664 | if (!done && i->f->bsg_timeout) { | |
3665 | /* call LLDD to abort the i/o as it has timed out */ | |
3666 | err = i->f->bsg_timeout(job); | |
b8f08645 SS |
3667 | if (err == -EAGAIN) { |
3668 | job->ref_cnt--; | |
3669 | return BLK_EH_RESET_TIMER; | |
3670 | } else if (err) | |
9e4f5e29 JS |
3671 | printk(KERN_ERR "ERROR: FC BSG request timeout - LLD " |
3672 | "abort failed with status %d\n", err); | |
3673 | } | |
3674 | ||
9e4f5e29 | 3675 | /* the blk_end_sync_io() doesn't check the error */ |
47e7e89e GM |
3676 | if (done) |
3677 | return BLK_EH_NOT_HANDLED; | |
3678 | else | |
3679 | return BLK_EH_HANDLED; | |
9e4f5e29 JS |
3680 | } |
3681 | ||
9e4f5e29 JS |
3682 | static int |
3683 | fc_bsg_map_buffer(struct fc_bsg_buffer *buf, struct request *req) | |
3684 | { | |
3685 | size_t sz = (sizeof(struct scatterlist) * req->nr_phys_segments); | |
3686 | ||
3687 | BUG_ON(!req->nr_phys_segments); | |
3688 | ||
3689 | buf->sg_list = kzalloc(sz, GFP_KERNEL); | |
3690 | if (!buf->sg_list) | |
3691 | return -ENOMEM; | |
3692 | sg_init_table(buf->sg_list, req->nr_phys_segments); | |
3693 | buf->sg_cnt = blk_rq_map_sg(req->q, req, buf->sg_list); | |
3694 | buf->payload_len = blk_rq_bytes(req); | |
3695 | return 0; | |
3696 | } | |
3697 | ||
3698 | ||
3699 | /** | |
3700 | * fc_req_to_bsgjob - Allocate/create the fc_bsg_job structure for the | |
3701 | * bsg request | |
3702 | * @shost: SCSI Host corresponding to the bsg object | |
3703 | * @rport: (optional) FC Remote Port corresponding to the bsg object | |
3704 | * @req: BSG request that needs a job structure | |
3705 | */ | |
3706 | static int | |
3707 | fc_req_to_bsgjob(struct Scsi_Host *shost, struct fc_rport *rport, | |
3708 | struct request *req) | |
3709 | { | |
3710 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
3711 | struct request *rsp = req->next_rq; | |
3712 | struct fc_bsg_job *job; | |
3713 | int ret; | |
3714 | ||
3715 | BUG_ON(req->special); | |
3716 | ||
3717 | job = kzalloc(sizeof(struct fc_bsg_job) + i->f->dd_bsg_size, | |
3718 | GFP_KERNEL); | |
3719 | if (!job) | |
3720 | return -ENOMEM; | |
3721 | ||
3722 | /* | |
3723 | * Note: this is a bit silly. | |
3724 | * The request gets formatted as a SGIO v4 ioctl request, which | |
3725 | * then gets reformatted as a blk request, which then gets | |
3726 | * reformatted as a fc bsg request. And on completion, we have | |
3727 | * to wrap return results such that SGIO v4 thinks it was a scsi | |
3728 | * status. I hope this was all worth it. | |
3729 | */ | |
3730 | ||
3731 | req->special = job; | |
3732 | job->shost = shost; | |
3733 | job->rport = rport; | |
3734 | job->req = req; | |
3735 | if (i->f->dd_bsg_size) | |
3736 | job->dd_data = (void *)&job[1]; | |
3737 | spin_lock_init(&job->job_lock); | |
3738 | job->request = (struct fc_bsg_request *)req->cmd; | |
3739 | job->request_len = req->cmd_len; | |
3740 | job->reply = req->sense; | |
3741 | job->reply_len = SCSI_SENSE_BUFFERSIZE; /* Size of sense buffer | |
3742 | * allocated */ | |
3743 | if (req->bio) { | |
3744 | ret = fc_bsg_map_buffer(&job->request_payload, req); | |
3745 | if (ret) | |
3746 | goto failjob_rls_job; | |
3747 | } | |
3748 | if (rsp && rsp->bio) { | |
3749 | ret = fc_bsg_map_buffer(&job->reply_payload, rsp); | |
3750 | if (ret) | |
3751 | goto failjob_rls_rqst_payload; | |
3752 | } | |
3753 | job->job_done = fc_bsg_jobdone; | |
3754 | if (rport) | |
3755 | job->dev = &rport->dev; | |
3756 | else | |
3757 | job->dev = &shost->shost_gendev; | |
3758 | get_device(job->dev); /* take a reference for the request */ | |
3759 | ||
3760 | job->ref_cnt = 1; | |
3761 | ||
3762 | return 0; | |
3763 | ||
3764 | ||
3765 | failjob_rls_rqst_payload: | |
3766 | kfree(job->request_payload.sg_list); | |
3767 | failjob_rls_job: | |
3768 | kfree(job); | |
3769 | return -ENOMEM; | |
3770 | } | |
3771 | ||
3772 | ||
3773 | enum fc_dispatch_result { | |
3774 | FC_DISPATCH_BREAK, /* on return, q is locked, break from q loop */ | |
3775 | FC_DISPATCH_LOCKED, /* on return, q is locked, continue on */ | |
3776 | FC_DISPATCH_UNLOCKED, /* on return, q is unlocked, continue on */ | |
3777 | }; | |
3778 | ||
3779 | ||
3780 | /** | |
3781 | * fc_bsg_host_dispatch - process fc host bsg requests and dispatch to LLDD | |
5415907a | 3782 | * @q: fc host request queue |
9e4f5e29 JS |
3783 | * @shost: scsi host rport attached to |
3784 | * @job: bsg job to be processed | |
3785 | */ | |
3786 | static enum fc_dispatch_result | |
3787 | fc_bsg_host_dispatch(struct request_queue *q, struct Scsi_Host *shost, | |
3788 | struct fc_bsg_job *job) | |
3789 | { | |
3790 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
3791 | int cmdlen = sizeof(uint32_t); /* start with length of msgcode */ | |
3792 | int ret; | |
3793 | ||
3794 | /* Validate the host command */ | |
3795 | switch (job->request->msgcode) { | |
3796 | case FC_BSG_HST_ADD_RPORT: | |
3797 | cmdlen += sizeof(struct fc_bsg_host_add_rport); | |
3798 | break; | |
3799 | ||
3800 | case FC_BSG_HST_DEL_RPORT: | |
3801 | cmdlen += sizeof(struct fc_bsg_host_del_rport); | |
3802 | break; | |
3803 | ||
3804 | case FC_BSG_HST_ELS_NOLOGIN: | |
3805 | cmdlen += sizeof(struct fc_bsg_host_els); | |
3806 | /* there better be a xmt and rcv payloads */ | |
3807 | if ((!job->request_payload.payload_len) || | |
3808 | (!job->reply_payload.payload_len)) { | |
3809 | ret = -EINVAL; | |
3810 | goto fail_host_msg; | |
3811 | } | |
3812 | break; | |
3813 | ||
3814 | case FC_BSG_HST_CT: | |
3815 | cmdlen += sizeof(struct fc_bsg_host_ct); | |
3816 | /* there better be xmt and rcv payloads */ | |
3817 | if ((!job->request_payload.payload_len) || | |
3818 | (!job->reply_payload.payload_len)) { | |
3819 | ret = -EINVAL; | |
3820 | goto fail_host_msg; | |
3821 | } | |
3822 | break; | |
3823 | ||
3824 | case FC_BSG_HST_VENDOR: | |
3825 | cmdlen += sizeof(struct fc_bsg_host_vendor); | |
3826 | if ((shost->hostt->vendor_id == 0L) || | |
3827 | (job->request->rqst_data.h_vendor.vendor_id != | |
3828 | shost->hostt->vendor_id)) { | |
3829 | ret = -ESRCH; | |
3830 | goto fail_host_msg; | |
3831 | } | |
3832 | break; | |
3833 | ||
3834 | default: | |
3835 | ret = -EBADR; | |
3836 | goto fail_host_msg; | |
3837 | } | |
3838 | ||
3839 | /* check if we really have all the request data needed */ | |
3840 | if (job->request_len < cmdlen) { | |
3841 | ret = -ENOMSG; | |
3842 | goto fail_host_msg; | |
3843 | } | |
3844 | ||
3845 | ret = i->f->bsg_request(job); | |
3846 | if (!ret) | |
3847 | return FC_DISPATCH_UNLOCKED; | |
3848 | ||
3849 | fail_host_msg: | |
3850 | /* return the errno failure code as the only status */ | |
3851 | BUG_ON(job->reply_len < sizeof(uint32_t)); | |
61ec33eb | 3852 | job->reply->reply_payload_rcv_len = 0; |
9e4f5e29 JS |
3853 | job->reply->result = ret; |
3854 | job->reply_len = sizeof(uint32_t); | |
3855 | fc_bsg_jobdone(job); | |
3856 | return FC_DISPATCH_UNLOCKED; | |
3857 | } | |
3858 | ||
3859 | ||
3860 | /* | |
3861 | * fc_bsg_goose_queue - restart rport queue in case it was stopped | |
3862 | * @rport: rport to be restarted | |
3863 | */ | |
3864 | static void | |
3865 | fc_bsg_goose_queue(struct fc_rport *rport) | |
3866 | { | |
9e4f5e29 JS |
3867 | if (!rport->rqst_q) |
3868 | return; | |
3869 | ||
c21e6beb JA |
3870 | /* |
3871 | * This get/put dance makes no sense | |
3872 | */ | |
9e4f5e29 | 3873 | get_device(&rport->dev); |
c21e6beb | 3874 | blk_run_queue_async(rport->rqst_q); |
9e4f5e29 JS |
3875 | put_device(&rport->dev); |
3876 | } | |
3877 | ||
9e4f5e29 JS |
3878 | /** |
3879 | * fc_bsg_rport_dispatch - process rport bsg requests and dispatch to LLDD | |
5415907a | 3880 | * @q: rport request queue |
9e4f5e29 JS |
3881 | * @shost: scsi host rport attached to |
3882 | * @rport: rport request destined to | |
3883 | * @job: bsg job to be processed | |
3884 | */ | |
3885 | static enum fc_dispatch_result | |
3886 | fc_bsg_rport_dispatch(struct request_queue *q, struct Scsi_Host *shost, | |
3887 | struct fc_rport *rport, struct fc_bsg_job *job) | |
3888 | { | |
3889 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
3890 | int cmdlen = sizeof(uint32_t); /* start with length of msgcode */ | |
3891 | int ret; | |
3892 | ||
3893 | /* Validate the rport command */ | |
3894 | switch (job->request->msgcode) { | |
3895 | case FC_BSG_RPT_ELS: | |
3896 | cmdlen += sizeof(struct fc_bsg_rport_els); | |
3897 | goto check_bidi; | |
3898 | ||
3899 | case FC_BSG_RPT_CT: | |
3900 | cmdlen += sizeof(struct fc_bsg_rport_ct); | |
3901 | check_bidi: | |
3902 | /* there better be xmt and rcv payloads */ | |
3903 | if ((!job->request_payload.payload_len) || | |
3904 | (!job->reply_payload.payload_len)) { | |
3905 | ret = -EINVAL; | |
3906 | goto fail_rport_msg; | |
3907 | } | |
3908 | break; | |
3909 | default: | |
3910 | ret = -EBADR; | |
3911 | goto fail_rport_msg; | |
3912 | } | |
3913 | ||
3914 | /* check if we really have all the request data needed */ | |
3915 | if (job->request_len < cmdlen) { | |
3916 | ret = -ENOMSG; | |
3917 | goto fail_rport_msg; | |
3918 | } | |
3919 | ||
3920 | ret = i->f->bsg_request(job); | |
3921 | if (!ret) | |
3922 | return FC_DISPATCH_UNLOCKED; | |
3923 | ||
3924 | fail_rport_msg: | |
3925 | /* return the errno failure code as the only status */ | |
3926 | BUG_ON(job->reply_len < sizeof(uint32_t)); | |
61ec33eb | 3927 | job->reply->reply_payload_rcv_len = 0; |
9e4f5e29 JS |
3928 | job->reply->result = ret; |
3929 | job->reply_len = sizeof(uint32_t); | |
3930 | fc_bsg_jobdone(job); | |
3931 | return FC_DISPATCH_UNLOCKED; | |
3932 | } | |
3933 | ||
3934 | ||
3935 | /** | |
3936 | * fc_bsg_request_handler - generic handler for bsg requests | |
3937 | * @q: request queue to manage | |
3938 | * @shost: Scsi_Host related to the bsg object | |
3939 | * @rport: FC remote port related to the bsg object (optional) | |
3940 | * @dev: device structure for bsg object | |
3941 | */ | |
3942 | static void | |
3943 | fc_bsg_request_handler(struct request_queue *q, struct Scsi_Host *shost, | |
3944 | struct fc_rport *rport, struct device *dev) | |
3945 | { | |
3946 | struct request *req; | |
3947 | struct fc_bsg_job *job; | |
3948 | enum fc_dispatch_result ret; | |
3949 | ||
3950 | if (!get_device(dev)) | |
3951 | return; | |
3952 | ||
7eaceacc | 3953 | while (1) { |
2bc1c59d MC |
3954 | if (rport && (rport->port_state == FC_PORTSTATE_BLOCKED) && |
3955 | !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)) | |
3956 | break; | |
9e4f5e29 JS |
3957 | |
3958 | req = blk_fetch_request(q); | |
3959 | if (!req) | |
3960 | break; | |
3961 | ||
3962 | if (rport && (rport->port_state != FC_PORTSTATE_ONLINE)) { | |
3963 | req->errors = -ENXIO; | |
3964 | spin_unlock_irq(q->queue_lock); | |
d88a714b | 3965 | blk_end_request_all(req, -ENXIO); |
9e4f5e29 JS |
3966 | spin_lock_irq(q->queue_lock); |
3967 | continue; | |
3968 | } | |
3969 | ||
3970 | spin_unlock_irq(q->queue_lock); | |
3971 | ||
3972 | ret = fc_req_to_bsgjob(shost, rport, req); | |
3973 | if (ret) { | |
3974 | req->errors = ret; | |
d88a714b | 3975 | blk_end_request_all(req, ret); |
9e4f5e29 JS |
3976 | spin_lock_irq(q->queue_lock); |
3977 | continue; | |
3978 | } | |
3979 | ||
3980 | job = req->special; | |
3981 | ||
3982 | /* check if we have the msgcode value at least */ | |
3983 | if (job->request_len < sizeof(uint32_t)) { | |
3984 | BUG_ON(job->reply_len < sizeof(uint32_t)); | |
61ec33eb | 3985 | job->reply->reply_payload_rcv_len = 0; |
9e4f5e29 JS |
3986 | job->reply->result = -ENOMSG; |
3987 | job->reply_len = sizeof(uint32_t); | |
3988 | fc_bsg_jobdone(job); | |
3989 | spin_lock_irq(q->queue_lock); | |
3990 | continue; | |
3991 | } | |
3992 | ||
3993 | /* the dispatch routines will unlock the queue_lock */ | |
3994 | if (rport) | |
3995 | ret = fc_bsg_rport_dispatch(q, shost, rport, job); | |
3996 | else | |
3997 | ret = fc_bsg_host_dispatch(q, shost, job); | |
3998 | ||
3999 | /* did dispatcher hit state that can't process any more */ | |
4000 | if (ret == FC_DISPATCH_BREAK) | |
4001 | break; | |
4002 | ||
4003 | /* did dispatcher had released the lock */ | |
4004 | if (ret == FC_DISPATCH_UNLOCKED) | |
4005 | spin_lock_irq(q->queue_lock); | |
4006 | } | |
4007 | ||
4008 | spin_unlock_irq(q->queue_lock); | |
4009 | put_device(dev); | |
4010 | spin_lock_irq(q->queue_lock); | |
4011 | } | |
4012 | ||
4013 | ||
4014 | /** | |
4015 | * fc_bsg_host_handler - handler for bsg requests for a fc host | |
4016 | * @q: fc host request queue | |
4017 | */ | |
4018 | static void | |
4019 | fc_bsg_host_handler(struct request_queue *q) | |
4020 | { | |
4021 | struct Scsi_Host *shost = q->queuedata; | |
4022 | ||
4023 | fc_bsg_request_handler(q, shost, NULL, &shost->shost_gendev); | |
4024 | } | |
4025 | ||
4026 | ||
4027 | /** | |
4028 | * fc_bsg_rport_handler - handler for bsg requests for a fc rport | |
4029 | * @q: rport request queue | |
4030 | */ | |
4031 | static void | |
4032 | fc_bsg_rport_handler(struct request_queue *q) | |
4033 | { | |
4034 | struct fc_rport *rport = q->queuedata; | |
4035 | struct Scsi_Host *shost = rport_to_shost(rport); | |
4036 | ||
4037 | fc_bsg_request_handler(q, shost, rport, &rport->dev); | |
4038 | } | |
4039 | ||
4040 | ||
4041 | /** | |
4042 | * fc_bsg_hostadd - Create and add the bsg hooks so we can receive requests | |
4043 | * @shost: shost for fc_host | |
4044 | * @fc_host: fc_host adding the structures to | |
4045 | */ | |
4046 | static int | |
4047 | fc_bsg_hostadd(struct Scsi_Host *shost, struct fc_host_attrs *fc_host) | |
4048 | { | |
4049 | struct device *dev = &shost->shost_gendev; | |
4050 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
4051 | struct request_queue *q; | |
4052 | int err; | |
3c559ea8 | 4053 | char bsg_name[20]; |
9e4f5e29 JS |
4054 | |
4055 | fc_host->rqst_q = NULL; | |
4056 | ||
4057 | if (!i->f->bsg_request) | |
4058 | return -ENOTSUPP; | |
4059 | ||
4060 | snprintf(bsg_name, sizeof(bsg_name), | |
4061 | "fc_host%d", shost->host_no); | |
4062 | ||
4063 | q = __scsi_alloc_queue(shost, fc_bsg_host_handler); | |
4064 | if (!q) { | |
4065 | printk(KERN_ERR "fc_host%d: bsg interface failed to " | |
4066 | "initialize - no request queue\n", | |
4067 | shost->host_no); | |
4068 | return -ENOMEM; | |
4069 | } | |
4070 | ||
4071 | q->queuedata = shost; | |
4072 | queue_flag_set_unlocked(QUEUE_FLAG_BIDI, q); | |
b5c6f776 | 4073 | blk_queue_softirq_done(q, fc_bsg_softirq_done); |
9e4f5e29 JS |
4074 | blk_queue_rq_timed_out(q, fc_bsg_job_timeout); |
4075 | blk_queue_rq_timeout(q, FC_DEFAULT_BSG_TIMEOUT); | |
4076 | ||
4077 | err = bsg_register_queue(q, dev, bsg_name, NULL); | |
4078 | if (err) { | |
4079 | printk(KERN_ERR "fc_host%d: bsg interface failed to " | |
4080 | "initialize - register queue\n", | |
4081 | shost->host_no); | |
4082 | blk_cleanup_queue(q); | |
4083 | return err; | |
4084 | } | |
4085 | ||
4086 | fc_host->rqst_q = q; | |
4087 | return 0; | |
4088 | } | |
4089 | ||
4090 | ||
4091 | /** | |
4092 | * fc_bsg_rportadd - Create and add the bsg hooks so we can receive requests | |
4093 | * @shost: shost that rport is attached to | |
4094 | * @rport: rport that the bsg hooks are being attached to | |
4095 | */ | |
4096 | static int | |
4097 | fc_bsg_rportadd(struct Scsi_Host *shost, struct fc_rport *rport) | |
4098 | { | |
4099 | struct device *dev = &rport->dev; | |
4100 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
4101 | struct request_queue *q; | |
4102 | int err; | |
4103 | ||
4104 | rport->rqst_q = NULL; | |
4105 | ||
4106 | if (!i->f->bsg_request) | |
4107 | return -ENOTSUPP; | |
4108 | ||
4109 | q = __scsi_alloc_queue(shost, fc_bsg_rport_handler); | |
4110 | if (!q) { | |
4111 | printk(KERN_ERR "%s: bsg interface failed to " | |
4112 | "initialize - no request queue\n", | |
4113 | dev->kobj.name); | |
4114 | return -ENOMEM; | |
4115 | } | |
4116 | ||
4117 | q->queuedata = rport; | |
4118 | queue_flag_set_unlocked(QUEUE_FLAG_BIDI, q); | |
b5c6f776 | 4119 | blk_queue_softirq_done(q, fc_bsg_softirq_done); |
9e4f5e29 JS |
4120 | blk_queue_rq_timed_out(q, fc_bsg_job_timeout); |
4121 | blk_queue_rq_timeout(q, BLK_DEFAULT_SG_TIMEOUT); | |
4122 | ||
4123 | err = bsg_register_queue(q, dev, NULL, NULL); | |
4124 | if (err) { | |
4125 | printk(KERN_ERR "%s: bsg interface failed to " | |
4126 | "initialize - register queue\n", | |
4127 | dev->kobj.name); | |
4128 | blk_cleanup_queue(q); | |
4129 | return err; | |
4130 | } | |
4131 | ||
4132 | rport->rqst_q = q; | |
4133 | return 0; | |
4134 | } | |
4135 | ||
4136 | ||
4137 | /** | |
4138 | * fc_bsg_remove - Deletes the bsg hooks on fchosts/rports | |
4139 | * @q: the request_queue that is to be torn down. | |
78d16341 JS |
4140 | * |
4141 | * Notes: | |
4142 | * Before unregistering the queue empty any requests that are blocked | |
4143 | * | |
4144 | * | |
9e4f5e29 JS |
4145 | */ |
4146 | static void | |
4147 | fc_bsg_remove(struct request_queue *q) | |
4148 | { | |
78d16341 JS |
4149 | struct request *req; /* block request */ |
4150 | int counts; /* totals for request_list count and starved */ | |
4151 | ||
9e4f5e29 | 4152 | if (q) { |
78d16341 JS |
4153 | /* Stop taking in new requests */ |
4154 | spin_lock_irq(q->queue_lock); | |
4155 | blk_stop_queue(q); | |
4156 | ||
4157 | /* drain all requests in the queue */ | |
4158 | while (1) { | |
4159 | /* need the lock to fetch a request | |
4160 | * this may fetch the same reqeust as the previous pass | |
4161 | */ | |
4162 | req = blk_fetch_request(q); | |
4163 | /* save requests in use and starved */ | |
4164 | counts = q->rq.count[0] + q->rq.count[1] + | |
4165 | q->rq.starved[0] + q->rq.starved[1]; | |
4166 | spin_unlock_irq(q->queue_lock); | |
4167 | /* any requests still outstanding? */ | |
4168 | if (counts == 0) | |
4169 | break; | |
4170 | ||
4171 | /* This may be the same req as the previous iteration, | |
4172 | * always send the blk_end_request_all after a prefetch. | |
4173 | * It is not okay to not end the request because the | |
4174 | * prefetch started the request. | |
4175 | */ | |
4176 | if (req) { | |
4177 | /* return -ENXIO to indicate that this queue is | |
4178 | * going away | |
4179 | */ | |
4180 | req->errors = -ENXIO; | |
4181 | blk_end_request_all(req, -ENXIO); | |
4182 | } | |
4183 | ||
4184 | msleep(200); /* allow bsg to possibly finish */ | |
4185 | spin_lock_irq(q->queue_lock); | |
4186 | } | |
4187 | ||
9e4f5e29 JS |
4188 | bsg_unregister_queue(q); |
4189 | blk_cleanup_queue(q); | |
4190 | } | |
4191 | } | |
4192 | ||
4193 | ||
9ef3e4a4 JS |
4194 | /* Original Author: Martin Hicks */ |
4195 | MODULE_AUTHOR("James Smart"); | |
1da177e4 LT |
4196 | MODULE_DESCRIPTION("FC Transport Attributes"); |
4197 | MODULE_LICENSE("GPL"); | |
4198 | ||
4199 | module_init(fc_transport_init); | |
4200 | module_exit(fc_transport_exit); |