Commit | Line | Data |
---|---|---|
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 |
4643682b | 316 | #define FC_HOST_NUM_ATTRS 22 |
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)); | |
402 | ||
403 | fc_host->port_id = -1; | |
404 | fc_host->port_type = FC_PORTTYPE_UNKNOWN; | |
405 | fc_host->port_state = FC_PORTSTATE_UNKNOWN; | |
406 | memset(fc_host->active_fc4s, 0, | |
407 | sizeof(fc_host->active_fc4s)); | |
408 | fc_host->speed = FC_PORTSPEED_UNKNOWN; | |
409 | fc_host->fabric_name = -1; | |
b8d08210 JS |
410 | memset(fc_host->symbolic_name, 0, sizeof(fc_host->symbolic_name)); |
411 | memset(fc_host->system_hostname, 0, sizeof(fc_host->system_hostname)); | |
aedf3497 JS |
412 | |
413 | fc_host->tgtid_bind_type = FC_TGTID_BIND_BY_WWPN; | |
414 | ||
415 | INIT_LIST_HEAD(&fc_host->rports); | |
416 | INIT_LIST_HEAD(&fc_host->rport_bindings); | |
a53eb5e0 | 417 | INIT_LIST_HEAD(&fc_host->vports); |
aedf3497 JS |
418 | fc_host->next_rport_number = 0; |
419 | fc_host->next_target_id = 0; | |
a53eb5e0 JS |
420 | fc_host->next_vport_number = 0; |
421 | fc_host->npiv_vports_inuse = 0; | |
aedf3497 | 422 | |
aab0de24 KS |
423 | snprintf(fc_host->work_q_name, sizeof(fc_host->work_q_name), |
424 | "fc_wq_%d", shost->host_no); | |
112f661d | 425 | fc_host->work_q = alloc_workqueue(fc_host->work_q_name, 0, 0); |
aedf3497 JS |
426 | if (!fc_host->work_q) |
427 | return -ENOMEM; | |
428 | ||
43ca910a | 429 | fc_host->dev_loss_tmo = fc_dev_loss_tmo; |
aab0de24 KS |
430 | snprintf(fc_host->devloss_work_q_name, |
431 | sizeof(fc_host->devloss_work_q_name), | |
432 | "fc_dl_%d", shost->host_no); | |
112f661d NNS |
433 | fc_host->devloss_work_q = |
434 | alloc_workqueue(fc_host->devloss_work_q_name, 0, 0); | |
aedf3497 JS |
435 | if (!fc_host->devloss_work_q) { |
436 | destroy_workqueue(fc_host->work_q); | |
437 | fc_host->work_q = NULL; | |
438 | return -ENOMEM; | |
439 | } | |
440 | ||
9e4f5e29 JS |
441 | fc_bsg_hostadd(shost, fc_host); |
442 | /* ignore any bsg add error - we just can't do sgio */ | |
443 | ||
444 | return 0; | |
445 | } | |
446 | ||
447 | static int fc_host_remove(struct transport_container *tc, struct device *dev, | |
448 | struct device *cdev) | |
449 | { | |
450 | struct Scsi_Host *shost = dev_to_shost(dev); | |
451 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); | |
452 | ||
453 | fc_bsg_remove(fc_host->rqst_q); | |
1da177e4 LT |
454 | return 0; |
455 | } | |
456 | ||
457 | static DECLARE_TRANSPORT_CLASS(fc_host_class, | |
458 | "fc_host", | |
459 | fc_host_setup, | |
9e4f5e29 | 460 | fc_host_remove, |
1da177e4 LT |
461 | NULL); |
462 | ||
463 | /* | |
464 | * Setup and Remove actions for remote ports are handled | |
465 | * in the service functions below. | |
466 | */ | |
467 | static DECLARE_TRANSPORT_CLASS(fc_rport_class, | |
468 | "fc_remote_ports", | |
469 | NULL, | |
470 | NULL, | |
471 | NULL); | |
472 | ||
a53eb5e0 JS |
473 | /* |
474 | * Setup and Remove actions for virtual ports are handled | |
475 | * in the service functions below. | |
476 | */ | |
477 | static DECLARE_TRANSPORT_CLASS(fc_vport_class, | |
478 | "fc_vports", | |
479 | NULL, | |
480 | NULL, | |
481 | NULL); | |
482 | ||
eb44820c | 483 | /* |
84314fd4 | 484 | * Netlink Infrastructure |
eb44820c | 485 | */ |
84314fd4 JS |
486 | |
487 | static atomic_t fc_event_seq; | |
488 | ||
489 | /** | |
490 | * fc_get_event_number - Obtain the next sequential FC event number | |
491 | * | |
492 | * Notes: | |
eb44820c | 493 | * We could have inlined this, but it would have required fc_event_seq to |
84314fd4 JS |
494 | * be exposed. For now, live with the subroutine call. |
495 | * Atomic used to avoid lock/unlock... | |
eb44820c | 496 | */ |
84314fd4 JS |
497 | u32 |
498 | fc_get_event_number(void) | |
499 | { | |
500 | return atomic_add_return(1, &fc_event_seq); | |
501 | } | |
502 | EXPORT_SYMBOL(fc_get_event_number); | |
503 | ||
504 | ||
505 | /** | |
506 | * fc_host_post_event - called to post an even on an fc_host. | |
84314fd4 JS |
507 | * @shost: host the event occurred on |
508 | * @event_number: fc event number obtained from get_fc_event_number() | |
509 | * @event_code: fc_host event being posted | |
510 | * @event_data: 32bits of data for the event being posted | |
511 | * | |
512 | * Notes: | |
513 | * This routine assumes no locks are held on entry. | |
eb44820c | 514 | */ |
84314fd4 JS |
515 | void |
516 | fc_host_post_event(struct Scsi_Host *shost, u32 event_number, | |
517 | enum fc_host_event_code event_code, u32 event_data) | |
518 | { | |
519 | struct sk_buff *skb; | |
520 | struct nlmsghdr *nlh; | |
521 | struct fc_nl_event *event; | |
522 | const char *name; | |
523 | u32 len, skblen; | |
524 | int err; | |
525 | ||
526 | if (!scsi_nl_sock) { | |
527 | err = -ENOENT; | |
528 | goto send_fail; | |
529 | } | |
530 | ||
531 | len = FC_NL_MSGALIGN(sizeof(*event)); | |
532 | skblen = NLMSG_SPACE(len); | |
533 | ||
534 | skb = alloc_skb(skblen, GFP_KERNEL); | |
535 | if (!skb) { | |
536 | err = -ENOBUFS; | |
537 | goto send_fail; | |
538 | } | |
539 | ||
540 | nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, | |
541 | skblen - sizeof(*nlh), 0); | |
542 | if (!nlh) { | |
543 | err = -ENOBUFS; | |
544 | goto send_fail_skb; | |
545 | } | |
546 | event = NLMSG_DATA(nlh); | |
547 | ||
548 | INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC, | |
549 | FC_NL_ASYNC_EVENT, len); | |
550 | event->seconds = get_seconds(); | |
551 | event->vendor_id = 0; | |
552 | event->host_no = shost->host_no; | |
553 | event->event_datalen = sizeof(u32); /* bytes */ | |
554 | event->event_num = event_number; | |
555 | event->event_code = event_code; | |
556 | event->event_data = event_data; | |
557 | ||
ff491a73 PNA |
558 | nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS, |
559 | GFP_KERNEL); | |
84314fd4 JS |
560 | return; |
561 | ||
562 | send_fail_skb: | |
563 | kfree_skb(skb); | |
564 | send_fail: | |
565 | name = get_fc_host_event_code_name(event_code); | |
566 | printk(KERN_WARNING | |
567 | "%s: Dropped Event : host %d %s data 0x%08x - err %d\n", | |
cadbd4a5 | 568 | __func__, shost->host_no, |
84314fd4 JS |
569 | (name) ? name : "<unknown>", event_data, err); |
570 | return; | |
571 | } | |
572 | EXPORT_SYMBOL(fc_host_post_event); | |
573 | ||
574 | ||
575 | /** | |
eb44820c | 576 | * fc_host_post_vendor_event - called to post a vendor unique event on an fc_host |
84314fd4 JS |
577 | * @shost: host the event occurred on |
578 | * @event_number: fc event number obtained from get_fc_event_number() | |
579 | * @data_len: amount, in bytes, of vendor unique data | |
580 | * @data_buf: pointer to vendor unique data | |
eb44820c | 581 | * @vendor_id: Vendor id |
84314fd4 JS |
582 | * |
583 | * Notes: | |
584 | * This routine assumes no locks are held on entry. | |
eb44820c | 585 | */ |
84314fd4 JS |
586 | void |
587 | fc_host_post_vendor_event(struct Scsi_Host *shost, u32 event_number, | |
f14e2e29 | 588 | u32 data_len, char * data_buf, u64 vendor_id) |
84314fd4 JS |
589 | { |
590 | struct sk_buff *skb; | |
591 | struct nlmsghdr *nlh; | |
592 | struct fc_nl_event *event; | |
593 | u32 len, skblen; | |
594 | int err; | |
595 | ||
596 | if (!scsi_nl_sock) { | |
597 | err = -ENOENT; | |
598 | goto send_vendor_fail; | |
599 | } | |
600 | ||
601 | len = FC_NL_MSGALIGN(sizeof(*event) + data_len); | |
602 | skblen = NLMSG_SPACE(len); | |
603 | ||
604 | skb = alloc_skb(skblen, GFP_KERNEL); | |
605 | if (!skb) { | |
606 | err = -ENOBUFS; | |
607 | goto send_vendor_fail; | |
608 | } | |
609 | ||
610 | nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, | |
611 | skblen - sizeof(*nlh), 0); | |
612 | if (!nlh) { | |
613 | err = -ENOBUFS; | |
614 | goto send_vendor_fail_skb; | |
615 | } | |
616 | event = NLMSG_DATA(nlh); | |
617 | ||
618 | INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC, | |
619 | FC_NL_ASYNC_EVENT, len); | |
620 | event->seconds = get_seconds(); | |
621 | event->vendor_id = vendor_id; | |
622 | event->host_no = shost->host_no; | |
623 | event->event_datalen = data_len; /* bytes */ | |
624 | event->event_num = event_number; | |
625 | event->event_code = FCH_EVT_VENDOR_UNIQUE; | |
626 | memcpy(&event->event_data, data_buf, data_len); | |
627 | ||
ff491a73 PNA |
628 | nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS, |
629 | GFP_KERNEL); | |
84314fd4 JS |
630 | return; |
631 | ||
632 | send_vendor_fail_skb: | |
633 | kfree_skb(skb); | |
634 | send_vendor_fail: | |
635 | printk(KERN_WARNING | |
636 | "%s: Dropped Event : host %d vendor_unique - err %d\n", | |
cadbd4a5 | 637 | __func__, shost->host_no, err); |
84314fd4 JS |
638 | return; |
639 | } | |
640 | EXPORT_SYMBOL(fc_host_post_vendor_event); | |
641 | ||
642 | ||
1da177e4 LT |
643 | |
644 | static __init int fc_transport_init(void) | |
645 | { | |
84314fd4 JS |
646 | int error; |
647 | ||
648 | atomic_set(&fc_event_seq, 0); | |
649 | ||
650 | error = transport_class_register(&fc_host_class); | |
a53eb5e0 JS |
651 | if (error) |
652 | return error; | |
653 | error = transport_class_register(&fc_vport_class); | |
1da177e4 | 654 | if (error) |
48de68a4 | 655 | goto unreg_host_class; |
1da177e4 LT |
656 | error = transport_class_register(&fc_rport_class); |
657 | if (error) | |
48de68a4 MC |
658 | goto unreg_vport_class; |
659 | error = transport_class_register(&fc_transport_class); | |
660 | if (error) | |
661 | goto unreg_rport_class; | |
662 | return 0; | |
663 | ||
664 | unreg_rport_class: | |
665 | transport_class_unregister(&fc_rport_class); | |
666 | unreg_vport_class: | |
667 | transport_class_unregister(&fc_vport_class); | |
668 | unreg_host_class: | |
669 | transport_class_unregister(&fc_host_class); | |
670 | return error; | |
1da177e4 LT |
671 | } |
672 | ||
673 | static void __exit fc_transport_exit(void) | |
674 | { | |
675 | transport_class_unregister(&fc_transport_class); | |
676 | transport_class_unregister(&fc_rport_class); | |
677 | transport_class_unregister(&fc_host_class); | |
a53eb5e0 | 678 | transport_class_unregister(&fc_vport_class); |
1da177e4 LT |
679 | } |
680 | ||
681 | /* | |
682 | * FC Remote Port Attribute Management | |
683 | */ | |
684 | ||
685 | #define fc_rport_show_function(field, format_string, sz, cast) \ | |
686 | static ssize_t \ | |
ee959b00 TJ |
687 | show_fc_rport_##field (struct device *dev, \ |
688 | struct device_attribute *attr, char *buf) \ | |
1da177e4 | 689 | { \ |
ee959b00 | 690 | struct fc_rport *rport = transport_class_to_rport(dev); \ |
1da177e4 LT |
691 | struct Scsi_Host *shost = rport_to_shost(rport); \ |
692 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
19a7b4ae JSEC |
693 | if ((i->f->get_rport_##field) && \ |
694 | !((rport->port_state == FC_PORTSTATE_BLOCKED) || \ | |
42e33148 | 695 | (rport->port_state == FC_PORTSTATE_DELETED) || \ |
19a7b4ae | 696 | (rport->port_state == FC_PORTSTATE_NOTPRESENT))) \ |
1da177e4 LT |
697 | i->f->get_rport_##field(rport); \ |
698 | return snprintf(buf, sz, format_string, cast rport->field); \ | |
699 | } | |
700 | ||
701 | #define fc_rport_store_function(field) \ | |
702 | static ssize_t \ | |
ee959b00 TJ |
703 | store_fc_rport_##field(struct device *dev, \ |
704 | struct device_attribute *attr, \ | |
705 | const char *buf, size_t count) \ | |
1da177e4 LT |
706 | { \ |
707 | int val; \ | |
ee959b00 | 708 | struct fc_rport *rport = transport_class_to_rport(dev); \ |
1da177e4 LT |
709 | struct Scsi_Host *shost = rport_to_shost(rport); \ |
710 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
0f29b966 | 711 | char *cp; \ |
19a7b4ae | 712 | if ((rport->port_state == FC_PORTSTATE_BLOCKED) || \ |
42e33148 | 713 | (rport->port_state == FC_PORTSTATE_DELETED) || \ |
19a7b4ae JSEC |
714 | (rport->port_state == FC_PORTSTATE_NOTPRESENT)) \ |
715 | return -EBUSY; \ | |
0f29b966 JS |
716 | val = simple_strtoul(buf, &cp, 0); \ |
717 | if (*cp && (*cp != '\n')) \ | |
718 | return -EINVAL; \ | |
1da177e4 LT |
719 | i->f->set_rport_##field(rport, val); \ |
720 | return count; \ | |
721 | } | |
722 | ||
723 | #define fc_rport_rd_attr(field, format_string, sz) \ | |
724 | fc_rport_show_function(field, format_string, sz, ) \ | |
ee959b00 | 725 | static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ |
1da177e4 LT |
726 | show_fc_rport_##field, NULL) |
727 | ||
728 | #define fc_rport_rd_attr_cast(field, format_string, sz, cast) \ | |
729 | fc_rport_show_function(field, format_string, sz, (cast)) \ | |
ee959b00 | 730 | static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ |
1da177e4 LT |
731 | show_fc_rport_##field, NULL) |
732 | ||
733 | #define fc_rport_rw_attr(field, format_string, sz) \ | |
734 | fc_rport_show_function(field, format_string, sz, ) \ | |
735 | fc_rport_store_function(field) \ | |
ee959b00 | 736 | static FC_DEVICE_ATTR(rport, field, S_IRUGO | S_IWUSR, \ |
1da177e4 LT |
737 | show_fc_rport_##field, \ |
738 | store_fc_rport_##field) | |
739 | ||
740 | ||
741 | #define fc_private_rport_show_function(field, format_string, sz, cast) \ | |
742 | static ssize_t \ | |
ee959b00 TJ |
743 | show_fc_rport_##field (struct device *dev, \ |
744 | struct device_attribute *attr, char *buf) \ | |
1da177e4 | 745 | { \ |
ee959b00 | 746 | struct fc_rport *rport = transport_class_to_rport(dev); \ |
1da177e4 LT |
747 | return snprintf(buf, sz, format_string, cast rport->field); \ |
748 | } | |
749 | ||
750 | #define fc_private_rport_rd_attr(field, format_string, sz) \ | |
751 | fc_private_rport_show_function(field, format_string, sz, ) \ | |
ee959b00 | 752 | static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ |
1da177e4 LT |
753 | show_fc_rport_##field, NULL) |
754 | ||
755 | #define fc_private_rport_rd_attr_cast(field, format_string, sz, cast) \ | |
756 | fc_private_rport_show_function(field, format_string, sz, (cast)) \ | |
ee959b00 | 757 | static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ |
1da177e4 LT |
758 | show_fc_rport_##field, NULL) |
759 | ||
760 | ||
761 | #define fc_private_rport_rd_enum_attr(title, maxlen) \ | |
762 | static ssize_t \ | |
ee959b00 TJ |
763 | show_fc_rport_##title (struct device *dev, \ |
764 | struct device_attribute *attr, char *buf) \ | |
1da177e4 | 765 | { \ |
ee959b00 | 766 | struct fc_rport *rport = transport_class_to_rport(dev); \ |
1da177e4 LT |
767 | const char *name; \ |
768 | name = get_fc_##title##_name(rport->title); \ | |
769 | if (!name) \ | |
770 | return -EINVAL; \ | |
771 | return snprintf(buf, maxlen, "%s\n", name); \ | |
772 | } \ | |
ee959b00 | 773 | static FC_DEVICE_ATTR(rport, title, S_IRUGO, \ |
1da177e4 LT |
774 | show_fc_rport_##title, NULL) |
775 | ||
776 | ||
777 | #define SETUP_RPORT_ATTRIBUTE_RD(field) \ | |
ee959b00 | 778 | i->private_rport_attrs[count] = device_attr_rport_##field; \ |
1da177e4 LT |
779 | i->private_rport_attrs[count].attr.mode = S_IRUGO; \ |
780 | i->private_rport_attrs[count].store = NULL; \ | |
781 | i->rport_attrs[count] = &i->private_rport_attrs[count]; \ | |
782 | if (i->f->show_rport_##field) \ | |
783 | count++ | |
784 | ||
785 | #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(field) \ | |
ee959b00 | 786 | i->private_rport_attrs[count] = device_attr_rport_##field; \ |
1da177e4 LT |
787 | i->private_rport_attrs[count].attr.mode = S_IRUGO; \ |
788 | i->private_rport_attrs[count].store = NULL; \ | |
789 | i->rport_attrs[count] = &i->private_rport_attrs[count]; \ | |
790 | count++ | |
791 | ||
792 | #define SETUP_RPORT_ATTRIBUTE_RW(field) \ | |
ee959b00 | 793 | i->private_rport_attrs[count] = device_attr_rport_##field; \ |
1da177e4 LT |
794 | if (!i->f->set_rport_##field) { \ |
795 | i->private_rport_attrs[count].attr.mode = S_IRUGO; \ | |
796 | i->private_rport_attrs[count].store = NULL; \ | |
797 | } \ | |
798 | i->rport_attrs[count] = &i->private_rport_attrs[count]; \ | |
799 | if (i->f->show_rport_##field) \ | |
800 | count++ | |
801 | ||
0f29b966 JS |
802 | #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(field) \ |
803 | { \ | |
ee959b00 | 804 | i->private_rport_attrs[count] = device_attr_rport_##field; \ |
0f29b966 JS |
805 | i->rport_attrs[count] = &i->private_rport_attrs[count]; \ |
806 | count++; \ | |
807 | } | |
808 | ||
1da177e4 LT |
809 | |
810 | /* The FC Transport Remote Port Attributes: */ | |
811 | ||
812 | /* Fixed Remote Port Attributes */ | |
813 | ||
814 | fc_private_rport_rd_attr(maxframe_size, "%u bytes\n", 20); | |
815 | ||
816 | static ssize_t | |
ee959b00 TJ |
817 | show_fc_rport_supported_classes (struct device *dev, |
818 | struct device_attribute *attr, char *buf) | |
1da177e4 | 819 | { |
ee959b00 | 820 | struct fc_rport *rport = transport_class_to_rport(dev); |
1da177e4 LT |
821 | if (rport->supported_classes == FC_COS_UNSPECIFIED) |
822 | return snprintf(buf, 20, "unspecified\n"); | |
823 | return get_fc_cos_names(rport->supported_classes, buf); | |
824 | } | |
ee959b00 | 825 | static FC_DEVICE_ATTR(rport, supported_classes, S_IRUGO, |
1da177e4 LT |
826 | show_fc_rport_supported_classes, NULL); |
827 | ||
828 | /* Dynamic Remote Port Attributes */ | |
829 | ||
19a7b4ae JSEC |
830 | /* |
831 | * dev_loss_tmo attribute | |
832 | */ | |
43ca910a MC |
833 | static int fc_str_to_dev_loss(const char *buf, unsigned long *val) |
834 | { | |
835 | char *cp; | |
836 | ||
837 | *val = simple_strtoul(buf, &cp, 0); | |
838 | if ((*cp && (*cp != '\n')) || (*val < 0)) | |
839 | return -EINVAL; | |
840 | /* | |
841 | * Check for overflow; dev_loss_tmo is u32 | |
842 | */ | |
843 | if (*val > UINT_MAX) | |
844 | return -EINVAL; | |
845 | ||
846 | return 0; | |
847 | } | |
848 | ||
849 | static int fc_rport_set_dev_loss_tmo(struct fc_rport *rport, | |
850 | unsigned long val) | |
19a7b4ae | 851 | { |
19a7b4ae JSEC |
852 | struct Scsi_Host *shost = rport_to_shost(rport); |
853 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
43ca910a | 854 | |
19a7b4ae | 855 | if ((rport->port_state == FC_PORTSTATE_BLOCKED) || |
42e33148 | 856 | (rport->port_state == FC_PORTSTATE_DELETED) || |
19a7b4ae JSEC |
857 | (rport->port_state == FC_PORTSTATE_NOTPRESENT)) |
858 | return -EBUSY; | |
36dd288f HR |
859 | /* |
860 | * Check for overflow; dev_loss_tmo is u32 | |
861 | */ | |
862 | if (val > UINT_MAX) | |
863 | return -EINVAL; | |
864 | ||
f2818663 HR |
865 | /* |
866 | * If fast_io_fail is off we have to cap | |
867 | * dev_loss_tmo at SCSI_DEVICE_BLOCK_MAX_TIMEOUT | |
868 | */ | |
869 | if (rport->fast_io_fail_tmo == -1 && | |
870 | val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT) | |
871 | return -EINVAL; | |
872 | ||
19a7b4ae | 873 | i->f->set_rport_dev_loss_tmo(rport, val); |
43ca910a MC |
874 | return 0; |
875 | } | |
876 | ||
877 | fc_rport_show_function(dev_loss_tmo, "%d\n", 20, ) | |
878 | static ssize_t | |
879 | store_fc_rport_dev_loss_tmo(struct device *dev, struct device_attribute *attr, | |
880 | const char *buf, size_t count) | |
881 | { | |
882 | struct fc_rport *rport = transport_class_to_rport(dev); | |
883 | unsigned long val; | |
884 | int rc; | |
885 | ||
886 | rc = fc_str_to_dev_loss(buf, &val); | |
887 | if (rc) | |
888 | return rc; | |
889 | ||
890 | rc = fc_rport_set_dev_loss_tmo(rport, val); | |
891 | if (rc) | |
892 | return rc; | |
19a7b4ae JSEC |
893 | return count; |
894 | } | |
ee959b00 | 895 | static FC_DEVICE_ATTR(rport, dev_loss_tmo, S_IRUGO | S_IWUSR, |
19a7b4ae | 896 | show_fc_rport_dev_loss_tmo, store_fc_rport_dev_loss_tmo); |
1da177e4 LT |
897 | |
898 | ||
899 | /* Private Remote Port Attributes */ | |
900 | ||
901 | fc_private_rport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); | |
902 | fc_private_rport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); | |
903 | fc_private_rport_rd_attr(port_id, "0x%06x\n", 20); | |
904 | ||
905 | static ssize_t | |
ee959b00 TJ |
906 | show_fc_rport_roles (struct device *dev, struct device_attribute *attr, |
907 | char *buf) | |
1da177e4 | 908 | { |
ee959b00 | 909 | struct fc_rport *rport = transport_class_to_rport(dev); |
1da177e4 LT |
910 | |
911 | /* identify any roles that are port_id specific */ | |
912 | if ((rport->port_id != -1) && | |
913 | (rport->port_id & FC_WELLKNOWN_PORTID_MASK) == | |
914 | FC_WELLKNOWN_PORTID_MASK) { | |
915 | switch (rport->port_id & FC_WELLKNOWN_ROLE_MASK) { | |
916 | case FC_FPORT_PORTID: | |
917 | return snprintf(buf, 30, "Fabric Port\n"); | |
918 | case FC_FABCTLR_PORTID: | |
919 | return snprintf(buf, 30, "Fabric Controller\n"); | |
920 | case FC_DIRSRVR_PORTID: | |
921 | return snprintf(buf, 30, "Directory Server\n"); | |
922 | case FC_TIMESRVR_PORTID: | |
923 | return snprintf(buf, 30, "Time Server\n"); | |
924 | case FC_MGMTSRVR_PORTID: | |
925 | return snprintf(buf, 30, "Management Server\n"); | |
926 | default: | |
927 | return snprintf(buf, 30, "Unknown Fabric Entity\n"); | |
928 | } | |
929 | } else { | |
a53eb5e0 | 930 | if (rport->roles == FC_PORT_ROLE_UNKNOWN) |
1da177e4 | 931 | return snprintf(buf, 20, "unknown\n"); |
a53eb5e0 | 932 | return get_fc_port_roles_names(rport->roles, buf); |
1da177e4 LT |
933 | } |
934 | } | |
ee959b00 | 935 | static FC_DEVICE_ATTR(rport, roles, S_IRUGO, |
1da177e4 LT |
936 | show_fc_rport_roles, NULL); |
937 | ||
938 | fc_private_rport_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN); | |
939 | fc_private_rport_rd_attr(scsi_target_id, "%d\n", 20); | |
940 | ||
0f29b966 JS |
941 | /* |
942 | * fast_io_fail_tmo attribute | |
943 | */ | |
944 | static ssize_t | |
ee959b00 TJ |
945 | show_fc_rport_fast_io_fail_tmo (struct device *dev, |
946 | struct device_attribute *attr, char *buf) | |
0f29b966 | 947 | { |
ee959b00 | 948 | struct fc_rport *rport = transport_class_to_rport(dev); |
0f29b966 JS |
949 | |
950 | if (rport->fast_io_fail_tmo == -1) | |
951 | return snprintf(buf, 5, "off\n"); | |
952 | return snprintf(buf, 20, "%d\n", rport->fast_io_fail_tmo); | |
953 | } | |
954 | ||
955 | static ssize_t | |
ee959b00 TJ |
956 | store_fc_rport_fast_io_fail_tmo(struct device *dev, |
957 | struct device_attribute *attr, const char *buf, | |
958 | size_t count) | |
0f29b966 JS |
959 | { |
960 | int val; | |
961 | char *cp; | |
ee959b00 | 962 | struct fc_rport *rport = transport_class_to_rport(dev); |
0f29b966 JS |
963 | |
964 | if ((rport->port_state == FC_PORTSTATE_BLOCKED) || | |
965 | (rport->port_state == FC_PORTSTATE_DELETED) || | |
966 | (rport->port_state == FC_PORTSTATE_NOTPRESENT)) | |
967 | return -EBUSY; | |
968 | if (strncmp(buf, "off", 3) == 0) | |
969 | rport->fast_io_fail_tmo = -1; | |
970 | else { | |
971 | val = simple_strtoul(buf, &cp, 0); | |
f2818663 HR |
972 | if ((*cp && (*cp != '\n')) || (val < 0)) |
973 | return -EINVAL; | |
974 | /* | |
975 | * Cap fast_io_fail by dev_loss_tmo or | |
976 | * SCSI_DEVICE_BLOCK_MAX_TIMEOUT. | |
977 | */ | |
978 | if ((val >= rport->dev_loss_tmo) || | |
979 | (val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT)) | |
0f29b966 | 980 | return -EINVAL; |
f2818663 | 981 | |
0f29b966 JS |
982 | rport->fast_io_fail_tmo = val; |
983 | } | |
984 | return count; | |
985 | } | |
ee959b00 | 986 | static FC_DEVICE_ATTR(rport, fast_io_fail_tmo, S_IRUGO | S_IWUSR, |
0f29b966 | 987 | show_fc_rport_fast_io_fail_tmo, store_fc_rport_fast_io_fail_tmo); |
1da177e4 LT |
988 | |
989 | ||
990 | /* | |
991 | * FC SCSI Target Attribute Management | |
992 | */ | |
993 | ||
994 | /* | |
995 | * Note: in the target show function we recognize when the remote | |
732bee7a | 996 | * port is in the hierarchy and do not allow the driver to get |
1da177e4 LT |
997 | * involved in sysfs functions. The driver only gets involved if |
998 | * it's the "old" style that doesn't use rports. | |
999 | */ | |
1000 | #define fc_starget_show_function(field, format_string, sz, cast) \ | |
1001 | static ssize_t \ | |
ee959b00 TJ |
1002 | show_fc_starget_##field (struct device *dev, \ |
1003 | struct device_attribute *attr, char *buf) \ | |
1da177e4 | 1004 | { \ |
ee959b00 | 1005 | struct scsi_target *starget = transport_class_to_starget(dev); \ |
1da177e4 LT |
1006 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \ |
1007 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
1008 | struct fc_rport *rport = starget_to_rport(starget); \ | |
1009 | if (rport) \ | |
1010 | fc_starget_##field(starget) = rport->field; \ | |
1011 | else if (i->f->get_starget_##field) \ | |
1012 | i->f->get_starget_##field(starget); \ | |
1013 | return snprintf(buf, sz, format_string, \ | |
1014 | cast fc_starget_##field(starget)); \ | |
1015 | } | |
1016 | ||
1017 | #define fc_starget_rd_attr(field, format_string, sz) \ | |
1018 | fc_starget_show_function(field, format_string, sz, ) \ | |
ee959b00 | 1019 | static FC_DEVICE_ATTR(starget, field, S_IRUGO, \ |
1da177e4 LT |
1020 | show_fc_starget_##field, NULL) |
1021 | ||
1022 | #define fc_starget_rd_attr_cast(field, format_string, sz, cast) \ | |
1023 | fc_starget_show_function(field, format_string, sz, (cast)) \ | |
ee959b00 | 1024 | static FC_DEVICE_ATTR(starget, field, S_IRUGO, \ |
1da177e4 LT |
1025 | show_fc_starget_##field, NULL) |
1026 | ||
1027 | #define SETUP_STARGET_ATTRIBUTE_RD(field) \ | |
ee959b00 | 1028 | i->private_starget_attrs[count] = device_attr_starget_##field; \ |
1da177e4 LT |
1029 | i->private_starget_attrs[count].attr.mode = S_IRUGO; \ |
1030 | i->private_starget_attrs[count].store = NULL; \ | |
1031 | i->starget_attrs[count] = &i->private_starget_attrs[count]; \ | |
1032 | if (i->f->show_starget_##field) \ | |
1033 | count++ | |
1034 | ||
1035 | #define SETUP_STARGET_ATTRIBUTE_RW(field) \ | |
ee959b00 | 1036 | i->private_starget_attrs[count] = device_attr_starget_##field; \ |
1da177e4 LT |
1037 | if (!i->f->set_starget_##field) { \ |
1038 | i->private_starget_attrs[count].attr.mode = S_IRUGO; \ | |
1039 | i->private_starget_attrs[count].store = NULL; \ | |
1040 | } \ | |
1041 | i->starget_attrs[count] = &i->private_starget_attrs[count]; \ | |
1042 | if (i->f->show_starget_##field) \ | |
1043 | count++ | |
1044 | ||
1045 | /* The FC Transport SCSI Target Attributes: */ | |
1046 | fc_starget_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); | |
1047 | fc_starget_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); | |
1048 | fc_starget_rd_attr(port_id, "0x%06x\n", 20); | |
1049 | ||
1050 | ||
a53eb5e0 JS |
1051 | /* |
1052 | * FC Virtual Port Attribute Management | |
1053 | */ | |
1054 | ||
1055 | #define fc_vport_show_function(field, format_string, sz, cast) \ | |
1056 | static ssize_t \ | |
ee959b00 TJ |
1057 | show_fc_vport_##field (struct device *dev, \ |
1058 | struct device_attribute *attr, char *buf) \ | |
a53eb5e0 | 1059 | { \ |
ee959b00 | 1060 | struct fc_vport *vport = transport_class_to_vport(dev); \ |
a53eb5e0 JS |
1061 | struct Scsi_Host *shost = vport_to_shost(vport); \ |
1062 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
1063 | if ((i->f->get_vport_##field) && \ | |
1064 | !(vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))) \ | |
1065 | i->f->get_vport_##field(vport); \ | |
1066 | return snprintf(buf, sz, format_string, cast vport->field); \ | |
1067 | } | |
1068 | ||
1069 | #define fc_vport_store_function(field) \ | |
1070 | static ssize_t \ | |
ee959b00 TJ |
1071 | store_fc_vport_##field(struct device *dev, \ |
1072 | struct device_attribute *attr, \ | |
1073 | const char *buf, size_t count) \ | |
a53eb5e0 JS |
1074 | { \ |
1075 | int val; \ | |
ee959b00 | 1076 | struct fc_vport *vport = transport_class_to_vport(dev); \ |
a53eb5e0 JS |
1077 | struct Scsi_Host *shost = vport_to_shost(vport); \ |
1078 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
1079 | char *cp; \ | |
1080 | if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \ | |
1081 | return -EBUSY; \ | |
1082 | val = simple_strtoul(buf, &cp, 0); \ | |
1083 | if (*cp && (*cp != '\n')) \ | |
1084 | return -EINVAL; \ | |
1085 | i->f->set_vport_##field(vport, val); \ | |
1086 | return count; \ | |
1087 | } | |
1088 | ||
1089 | #define fc_vport_store_str_function(field, slen) \ | |
1090 | static ssize_t \ | |
ee959b00 TJ |
1091 | store_fc_vport_##field(struct device *dev, \ |
1092 | struct device_attribute *attr, \ | |
1093 | const char *buf, size_t count) \ | |
a53eb5e0 | 1094 | { \ |
ee959b00 | 1095 | struct fc_vport *vport = transport_class_to_vport(dev); \ |
a53eb5e0 JS |
1096 | struct Scsi_Host *shost = vport_to_shost(vport); \ |
1097 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
1098 | unsigned int cnt=count; \ | |
1099 | \ | |
1100 | /* count may include a LF at end of string */ \ | |
1101 | if (buf[cnt-1] == '\n') \ | |
1102 | cnt--; \ | |
1103 | if (cnt > ((slen) - 1)) \ | |
1104 | return -EINVAL; \ | |
1105 | memcpy(vport->field, buf, cnt); \ | |
1106 | i->f->set_vport_##field(vport); \ | |
1107 | return count; \ | |
1108 | } | |
1109 | ||
1110 | #define fc_vport_rd_attr(field, format_string, sz) \ | |
1111 | fc_vport_show_function(field, format_string, sz, ) \ | |
ee959b00 | 1112 | static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ |
a53eb5e0 JS |
1113 | show_fc_vport_##field, NULL) |
1114 | ||
1115 | #define fc_vport_rd_attr_cast(field, format_string, sz, cast) \ | |
1116 | fc_vport_show_function(field, format_string, sz, (cast)) \ | |
ee959b00 | 1117 | static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ |
a53eb5e0 JS |
1118 | show_fc_vport_##field, NULL) |
1119 | ||
1120 | #define fc_vport_rw_attr(field, format_string, sz) \ | |
1121 | fc_vport_show_function(field, format_string, sz, ) \ | |
1122 | fc_vport_store_function(field) \ | |
ee959b00 | 1123 | static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \ |
a53eb5e0 JS |
1124 | show_fc_vport_##field, \ |
1125 | store_fc_vport_##field) | |
1126 | ||
1127 | #define fc_private_vport_show_function(field, format_string, sz, cast) \ | |
1128 | static ssize_t \ | |
ee959b00 TJ |
1129 | show_fc_vport_##field (struct device *dev, \ |
1130 | struct device_attribute *attr, char *buf) \ | |
a53eb5e0 | 1131 | { \ |
ee959b00 | 1132 | struct fc_vport *vport = transport_class_to_vport(dev); \ |
a53eb5e0 JS |
1133 | return snprintf(buf, sz, format_string, cast vport->field); \ |
1134 | } | |
1135 | ||
1136 | #define fc_private_vport_store_u32_function(field) \ | |
1137 | static ssize_t \ | |
ee959b00 TJ |
1138 | store_fc_vport_##field(struct device *dev, \ |
1139 | struct device_attribute *attr, \ | |
1140 | const char *buf, size_t count) \ | |
a53eb5e0 JS |
1141 | { \ |
1142 | u32 val; \ | |
ee959b00 | 1143 | struct fc_vport *vport = transport_class_to_vport(dev); \ |
a53eb5e0 JS |
1144 | char *cp; \ |
1145 | if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \ | |
1146 | return -EBUSY; \ | |
1147 | val = simple_strtoul(buf, &cp, 0); \ | |
1148 | if (*cp && (*cp != '\n')) \ | |
1149 | return -EINVAL; \ | |
1150 | vport->field = val; \ | |
1151 | return count; \ | |
1152 | } | |
1153 | ||
1154 | ||
1155 | #define fc_private_vport_rd_attr(field, format_string, sz) \ | |
1156 | fc_private_vport_show_function(field, format_string, sz, ) \ | |
ee959b00 | 1157 | static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ |
a53eb5e0 JS |
1158 | show_fc_vport_##field, NULL) |
1159 | ||
1160 | #define fc_private_vport_rd_attr_cast(field, format_string, sz, cast) \ | |
1161 | fc_private_vport_show_function(field, format_string, sz, (cast)) \ | |
ee959b00 | 1162 | static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ |
a53eb5e0 JS |
1163 | show_fc_vport_##field, NULL) |
1164 | ||
1165 | #define fc_private_vport_rw_u32_attr(field, format_string, sz) \ | |
1166 | fc_private_vport_show_function(field, format_string, sz, ) \ | |
1167 | fc_private_vport_store_u32_function(field) \ | |
ee959b00 | 1168 | static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \ |
a53eb5e0 JS |
1169 | show_fc_vport_##field, \ |
1170 | store_fc_vport_##field) | |
1171 | ||
1172 | ||
1173 | #define fc_private_vport_rd_enum_attr(title, maxlen) \ | |
1174 | static ssize_t \ | |
ee959b00 TJ |
1175 | show_fc_vport_##title (struct device *dev, \ |
1176 | struct device_attribute *attr, \ | |
1177 | char *buf) \ | |
a53eb5e0 | 1178 | { \ |
ee959b00 | 1179 | struct fc_vport *vport = transport_class_to_vport(dev); \ |
a53eb5e0 JS |
1180 | const char *name; \ |
1181 | name = get_fc_##title##_name(vport->title); \ | |
1182 | if (!name) \ | |
1183 | return -EINVAL; \ | |
1184 | return snprintf(buf, maxlen, "%s\n", name); \ | |
1185 | } \ | |
ee959b00 | 1186 | static FC_DEVICE_ATTR(vport, title, S_IRUGO, \ |
a53eb5e0 JS |
1187 | show_fc_vport_##title, NULL) |
1188 | ||
1189 | ||
1190 | #define SETUP_VPORT_ATTRIBUTE_RD(field) \ | |
ee959b00 | 1191 | i->private_vport_attrs[count] = device_attr_vport_##field; \ |
a53eb5e0 JS |
1192 | i->private_vport_attrs[count].attr.mode = S_IRUGO; \ |
1193 | i->private_vport_attrs[count].store = NULL; \ | |
1194 | i->vport_attrs[count] = &i->private_vport_attrs[count]; \ | |
1195 | if (i->f->get_##field) \ | |
1196 | count++ | |
1197 | /* NOTE: Above MACRO differs: checks function not show bit */ | |
1198 | ||
1199 | #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(field) \ | |
ee959b00 | 1200 | i->private_vport_attrs[count] = device_attr_vport_##field; \ |
a53eb5e0 JS |
1201 | i->private_vport_attrs[count].attr.mode = S_IRUGO; \ |
1202 | i->private_vport_attrs[count].store = NULL; \ | |
1203 | i->vport_attrs[count] = &i->private_vport_attrs[count]; \ | |
1204 | count++ | |
1205 | ||
1206 | #define SETUP_VPORT_ATTRIBUTE_WR(field) \ | |
ee959b00 | 1207 | i->private_vport_attrs[count] = device_attr_vport_##field; \ |
a53eb5e0 JS |
1208 | i->vport_attrs[count] = &i->private_vport_attrs[count]; \ |
1209 | if (i->f->field) \ | |
1210 | count++ | |
1211 | /* NOTE: Above MACRO differs: checks function */ | |
1212 | ||
1213 | #define SETUP_VPORT_ATTRIBUTE_RW(field) \ | |
ee959b00 | 1214 | i->private_vport_attrs[count] = device_attr_vport_##field; \ |
a53eb5e0 JS |
1215 | if (!i->f->set_vport_##field) { \ |
1216 | i->private_vport_attrs[count].attr.mode = S_IRUGO; \ | |
1217 | i->private_vport_attrs[count].store = NULL; \ | |
1218 | } \ | |
1219 | i->vport_attrs[count] = &i->private_vport_attrs[count]; \ | |
1220 | count++ | |
1221 | /* NOTE: Above MACRO differs: does not check show bit */ | |
1222 | ||
1223 | #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RW(field) \ | |
1224 | { \ | |
ee959b00 | 1225 | i->private_vport_attrs[count] = device_attr_vport_##field; \ |
a53eb5e0 JS |
1226 | i->vport_attrs[count] = &i->private_vport_attrs[count]; \ |
1227 | count++; \ | |
1228 | } | |
1229 | ||
1230 | ||
1231 | /* The FC Transport Virtual Port Attributes: */ | |
1232 | ||
1233 | /* Fixed Virtual Port Attributes */ | |
1234 | ||
1235 | /* Dynamic Virtual Port Attributes */ | |
1236 | ||
1237 | /* Private Virtual Port Attributes */ | |
1238 | ||
1239 | fc_private_vport_rd_enum_attr(vport_state, FC_VPORTSTATE_MAX_NAMELEN); | |
1240 | fc_private_vport_rd_enum_attr(vport_last_state, FC_VPORTSTATE_MAX_NAMELEN); | |
1241 | fc_private_vport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); | |
1242 | fc_private_vport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); | |
1243 | ||
1244 | static ssize_t | |
ee959b00 TJ |
1245 | show_fc_vport_roles (struct device *dev, struct device_attribute *attr, |
1246 | char *buf) | |
a53eb5e0 | 1247 | { |
ee959b00 | 1248 | struct fc_vport *vport = transport_class_to_vport(dev); |
a53eb5e0 JS |
1249 | |
1250 | if (vport->roles == FC_PORT_ROLE_UNKNOWN) | |
1251 | return snprintf(buf, 20, "unknown\n"); | |
1252 | return get_fc_port_roles_names(vport->roles, buf); | |
1253 | } | |
ee959b00 | 1254 | static FC_DEVICE_ATTR(vport, roles, S_IRUGO, show_fc_vport_roles, NULL); |
a53eb5e0 JS |
1255 | |
1256 | fc_private_vport_rd_enum_attr(vport_type, FC_PORTTYPE_MAX_NAMELEN); | |
1257 | ||
1258 | fc_private_vport_show_function(symbolic_name, "%s\n", | |
1259 | FC_VPORT_SYMBOLIC_NAMELEN + 1, ) | |
1260 | fc_vport_store_str_function(symbolic_name, FC_VPORT_SYMBOLIC_NAMELEN) | |
ee959b00 | 1261 | static FC_DEVICE_ATTR(vport, symbolic_name, S_IRUGO | S_IWUSR, |
a53eb5e0 JS |
1262 | show_fc_vport_symbolic_name, store_fc_vport_symbolic_name); |
1263 | ||
1264 | static ssize_t | |
ee959b00 TJ |
1265 | store_fc_vport_delete(struct device *dev, struct device_attribute *attr, |
1266 | const char *buf, size_t count) | |
a53eb5e0 | 1267 | { |
ee959b00 | 1268 | struct fc_vport *vport = transport_class_to_vport(dev); |
9ef3e4a4 | 1269 | struct Scsi_Host *shost = vport_to_shost(vport); |
0d9dc7c8 GR |
1270 | unsigned long flags; |
1271 | ||
1272 | spin_lock_irqsave(shost->host_lock, flags); | |
1273 | if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) { | |
1274 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1275 | return -EBUSY; | |
1276 | } | |
1277 | vport->flags |= FC_VPORT_DELETING; | |
1278 | spin_unlock_irqrestore(shost->host_lock, flags); | |
a53eb5e0 | 1279 | |
9ef3e4a4 | 1280 | fc_queue_work(shost, &vport->vport_delete_work); |
a53eb5e0 JS |
1281 | return count; |
1282 | } | |
ee959b00 | 1283 | static FC_DEVICE_ATTR(vport, vport_delete, S_IWUSR, |
a53eb5e0 JS |
1284 | NULL, store_fc_vport_delete); |
1285 | ||
1286 | ||
1287 | /* | |
1288 | * Enable/Disable vport | |
1289 | * Write "1" to disable, write "0" to enable | |
1290 | */ | |
1291 | static ssize_t | |
ee959b00 TJ |
1292 | store_fc_vport_disable(struct device *dev, struct device_attribute *attr, |
1293 | const char *buf, | |
a53eb5e0 JS |
1294 | size_t count) |
1295 | { | |
ee959b00 | 1296 | struct fc_vport *vport = transport_class_to_vport(dev); |
a53eb5e0 JS |
1297 | struct Scsi_Host *shost = vport_to_shost(vport); |
1298 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
1299 | int stat; | |
1300 | ||
1301 | if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) | |
1302 | return -EBUSY; | |
1303 | ||
1304 | if (*buf == '0') { | |
1305 | if (vport->vport_state != FC_VPORT_DISABLED) | |
1306 | return -EALREADY; | |
1307 | } else if (*buf == '1') { | |
1308 | if (vport->vport_state == FC_VPORT_DISABLED) | |
1309 | return -EALREADY; | |
1310 | } else | |
1311 | return -EINVAL; | |
1312 | ||
1313 | stat = i->f->vport_disable(vport, ((*buf == '0') ? false : true)); | |
1314 | return stat ? stat : count; | |
1315 | } | |
ee959b00 | 1316 | static FC_DEVICE_ATTR(vport, vport_disable, S_IWUSR, |
a53eb5e0 JS |
1317 | NULL, store_fc_vport_disable); |
1318 | ||
1319 | ||
1da177e4 LT |
1320 | /* |
1321 | * Host Attribute Management | |
1322 | */ | |
1323 | ||
1324 | #define fc_host_show_function(field, format_string, sz, cast) \ | |
1325 | static ssize_t \ | |
ee959b00 TJ |
1326 | show_fc_host_##field (struct device *dev, \ |
1327 | struct device_attribute *attr, char *buf) \ | |
1da177e4 | 1328 | { \ |
ee959b00 | 1329 | struct Scsi_Host *shost = transport_class_to_shost(dev); \ |
1da177e4 LT |
1330 | struct fc_internal *i = to_fc_internal(shost->transportt); \ |
1331 | if (i->f->get_host_##field) \ | |
1332 | i->f->get_host_##field(shost); \ | |
1333 | return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \ | |
1334 | } | |
1335 | ||
1336 | #define fc_host_store_function(field) \ | |
1337 | static ssize_t \ | |
ee959b00 TJ |
1338 | store_fc_host_##field(struct device *dev, \ |
1339 | struct device_attribute *attr, \ | |
1340 | const char *buf, size_t count) \ | |
1da177e4 LT |
1341 | { \ |
1342 | int val; \ | |
ee959b00 | 1343 | struct Scsi_Host *shost = transport_class_to_shost(dev); \ |
1da177e4 | 1344 | struct fc_internal *i = to_fc_internal(shost->transportt); \ |
0f29b966 | 1345 | char *cp; \ |
1da177e4 | 1346 | \ |
0f29b966 JS |
1347 | val = simple_strtoul(buf, &cp, 0); \ |
1348 | if (*cp && (*cp != '\n')) \ | |
1349 | return -EINVAL; \ | |
1da177e4 LT |
1350 | i->f->set_host_##field(shost, val); \ |
1351 | return count; \ | |
1352 | } | |
1353 | ||
b8d08210 JS |
1354 | #define fc_host_store_str_function(field, slen) \ |
1355 | static ssize_t \ | |
ee959b00 TJ |
1356 | store_fc_host_##field(struct device *dev, \ |
1357 | struct device_attribute *attr, \ | |
1358 | const char *buf, size_t count) \ | |
b8d08210 | 1359 | { \ |
ee959b00 | 1360 | struct Scsi_Host *shost = transport_class_to_shost(dev); \ |
b8d08210 JS |
1361 | struct fc_internal *i = to_fc_internal(shost->transportt); \ |
1362 | unsigned int cnt=count; \ | |
1363 | \ | |
1364 | /* count may include a LF at end of string */ \ | |
1365 | if (buf[cnt-1] == '\n') \ | |
1366 | cnt--; \ | |
1367 | if (cnt > ((slen) - 1)) \ | |
1368 | return -EINVAL; \ | |
1369 | memcpy(fc_host_##field(shost), buf, cnt); \ | |
1370 | i->f->set_host_##field(shost); \ | |
1371 | return count; \ | |
1372 | } | |
1373 | ||
1da177e4 LT |
1374 | #define fc_host_rd_attr(field, format_string, sz) \ |
1375 | fc_host_show_function(field, format_string, sz, ) \ | |
ee959b00 | 1376 | static FC_DEVICE_ATTR(host, field, S_IRUGO, \ |
1da177e4 LT |
1377 | show_fc_host_##field, NULL) |
1378 | ||
1379 | #define fc_host_rd_attr_cast(field, format_string, sz, cast) \ | |
1380 | fc_host_show_function(field, format_string, sz, (cast)) \ | |
ee959b00 | 1381 | static FC_DEVICE_ATTR(host, field, S_IRUGO, \ |
1da177e4 LT |
1382 | show_fc_host_##field, NULL) |
1383 | ||
1384 | #define fc_host_rw_attr(field, format_string, sz) \ | |
1385 | fc_host_show_function(field, format_string, sz, ) \ | |
1386 | fc_host_store_function(field) \ | |
ee959b00 | 1387 | static FC_DEVICE_ATTR(host, field, S_IRUGO | S_IWUSR, \ |
1da177e4 LT |
1388 | show_fc_host_##field, \ |
1389 | store_fc_host_##field) | |
1390 | ||
1391 | #define fc_host_rd_enum_attr(title, maxlen) \ | |
1392 | static ssize_t \ | |
ee959b00 TJ |
1393 | show_fc_host_##title (struct device *dev, \ |
1394 | struct device_attribute *attr, char *buf) \ | |
1da177e4 | 1395 | { \ |
ee959b00 | 1396 | struct Scsi_Host *shost = transport_class_to_shost(dev); \ |
1da177e4 LT |
1397 | struct fc_internal *i = to_fc_internal(shost->transportt); \ |
1398 | const char *name; \ | |
1399 | if (i->f->get_host_##title) \ | |
1400 | i->f->get_host_##title(shost); \ | |
1401 | name = get_fc_##title##_name(fc_host_##title(shost)); \ | |
1402 | if (!name) \ | |
1403 | return -EINVAL; \ | |
1404 | return snprintf(buf, maxlen, "%s\n", name); \ | |
1405 | } \ | |
ee959b00 | 1406 | static FC_DEVICE_ATTR(host, title, S_IRUGO, show_fc_host_##title, NULL) |
1da177e4 LT |
1407 | |
1408 | #define SETUP_HOST_ATTRIBUTE_RD(field) \ | |
ee959b00 | 1409 | i->private_host_attrs[count] = device_attr_host_##field; \ |
1da177e4 LT |
1410 | i->private_host_attrs[count].attr.mode = S_IRUGO; \ |
1411 | i->private_host_attrs[count].store = NULL; \ | |
1412 | i->host_attrs[count] = &i->private_host_attrs[count]; \ | |
1413 | if (i->f->show_host_##field) \ | |
1414 | count++ | |
1415 | ||
a53eb5e0 | 1416 | #define SETUP_HOST_ATTRIBUTE_RD_NS(field) \ |
ee959b00 | 1417 | i->private_host_attrs[count] = device_attr_host_##field; \ |
a53eb5e0 JS |
1418 | i->private_host_attrs[count].attr.mode = S_IRUGO; \ |
1419 | i->private_host_attrs[count].store = NULL; \ | |
1420 | i->host_attrs[count] = &i->private_host_attrs[count]; \ | |
1421 | count++ | |
1422 | ||
1da177e4 | 1423 | #define SETUP_HOST_ATTRIBUTE_RW(field) \ |
ee959b00 | 1424 | i->private_host_attrs[count] = device_attr_host_##field; \ |
1da177e4 LT |
1425 | if (!i->f->set_host_##field) { \ |
1426 | i->private_host_attrs[count].attr.mode = S_IRUGO; \ | |
1427 | i->private_host_attrs[count].store = NULL; \ | |
1428 | } \ | |
1429 | i->host_attrs[count] = &i->private_host_attrs[count]; \ | |
1430 | if (i->f->show_host_##field) \ | |
1431 | count++ | |
1432 | ||
1433 | ||
1434 | #define fc_private_host_show_function(field, format_string, sz, cast) \ | |
1435 | static ssize_t \ | |
ee959b00 TJ |
1436 | show_fc_host_##field (struct device *dev, \ |
1437 | struct device_attribute *attr, char *buf) \ | |
1da177e4 | 1438 | { \ |
ee959b00 | 1439 | struct Scsi_Host *shost = transport_class_to_shost(dev); \ |
1da177e4 LT |
1440 | return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \ |
1441 | } | |
1442 | ||
1443 | #define fc_private_host_rd_attr(field, format_string, sz) \ | |
1444 | fc_private_host_show_function(field, format_string, sz, ) \ | |
ee959b00 | 1445 | static FC_DEVICE_ATTR(host, field, S_IRUGO, \ |
1da177e4 LT |
1446 | show_fc_host_##field, NULL) |
1447 | ||
1448 | #define fc_private_host_rd_attr_cast(field, format_string, sz, cast) \ | |
1449 | fc_private_host_show_function(field, format_string, sz, (cast)) \ | |
ee959b00 | 1450 | static FC_DEVICE_ATTR(host, field, S_IRUGO, \ |
1da177e4 LT |
1451 | show_fc_host_##field, NULL) |
1452 | ||
1453 | #define SETUP_PRIVATE_HOST_ATTRIBUTE_RD(field) \ | |
ee959b00 | 1454 | i->private_host_attrs[count] = device_attr_host_##field; \ |
1da177e4 LT |
1455 | i->private_host_attrs[count].attr.mode = S_IRUGO; \ |
1456 | i->private_host_attrs[count].store = NULL; \ | |
1457 | i->host_attrs[count] = &i->private_host_attrs[count]; \ | |
1458 | count++ | |
1459 | ||
1460 | #define SETUP_PRIVATE_HOST_ATTRIBUTE_RW(field) \ | |
91ca7b01 | 1461 | { \ |
ee959b00 | 1462 | i->private_host_attrs[count] = device_attr_host_##field; \ |
1da177e4 | 1463 | i->host_attrs[count] = &i->private_host_attrs[count]; \ |
91ca7b01 AV |
1464 | count++; \ |
1465 | } | |
1da177e4 LT |
1466 | |
1467 | ||
1468 | /* Fixed Host Attributes */ | |
1469 | ||
1470 | static ssize_t | |
ee959b00 TJ |
1471 | show_fc_host_supported_classes (struct device *dev, |
1472 | struct device_attribute *attr, char *buf) | |
1da177e4 | 1473 | { |
ee959b00 | 1474 | struct Scsi_Host *shost = transport_class_to_shost(dev); |
1da177e4 LT |
1475 | |
1476 | if (fc_host_supported_classes(shost) == FC_COS_UNSPECIFIED) | |
1477 | return snprintf(buf, 20, "unspecified\n"); | |
1478 | ||
1479 | return get_fc_cos_names(fc_host_supported_classes(shost), buf); | |
1480 | } | |
ee959b00 | 1481 | static FC_DEVICE_ATTR(host, supported_classes, S_IRUGO, |
1da177e4 LT |
1482 | show_fc_host_supported_classes, NULL); |
1483 | ||
1484 | static ssize_t | |
ee959b00 TJ |
1485 | show_fc_host_supported_fc4s (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 | return (ssize_t)show_fc_fc4s(buf, fc_host_supported_fc4s(shost)); |
1490 | } | |
ee959b00 | 1491 | static FC_DEVICE_ATTR(host, supported_fc4s, S_IRUGO, |
1da177e4 LT |
1492 | show_fc_host_supported_fc4s, NULL); |
1493 | ||
1494 | static ssize_t | |
ee959b00 TJ |
1495 | show_fc_host_supported_speeds (struct device *dev, |
1496 | struct device_attribute *attr, char *buf) | |
1da177e4 | 1497 | { |
ee959b00 | 1498 | struct Scsi_Host *shost = transport_class_to_shost(dev); |
1da177e4 LT |
1499 | |
1500 | if (fc_host_supported_speeds(shost) == FC_PORTSPEED_UNKNOWN) | |
1501 | return snprintf(buf, 20, "unknown\n"); | |
1502 | ||
1503 | return get_fc_port_speed_names(fc_host_supported_speeds(shost), buf); | |
1504 | } | |
ee959b00 | 1505 | static FC_DEVICE_ATTR(host, supported_speeds, S_IRUGO, |
1da177e4 LT |
1506 | show_fc_host_supported_speeds, NULL); |
1507 | ||
1508 | ||
1509 | fc_private_host_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); | |
1510 | fc_private_host_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); | |
6b7281d0 AH |
1511 | fc_private_host_rd_attr_cast(permanent_port_name, "0x%llx\n", 20, |
1512 | unsigned long long); | |
1da177e4 | 1513 | fc_private_host_rd_attr(maxframe_size, "%u bytes\n", 20); |
a53eb5e0 | 1514 | fc_private_host_rd_attr(max_npiv_vports, "%u\n", 20); |
1da177e4 LT |
1515 | fc_private_host_rd_attr(serial_number, "%s\n", (FC_SERIAL_NUMBER_SIZE +1)); |
1516 | ||
1517 | ||
1518 | /* Dynamic Host Attributes */ | |
1519 | ||
1520 | static ssize_t | |
ee959b00 TJ |
1521 | show_fc_host_active_fc4s (struct device *dev, |
1522 | struct device_attribute *attr, char *buf) | |
1da177e4 | 1523 | { |
ee959b00 | 1524 | struct Scsi_Host *shost = transport_class_to_shost(dev); |
1da177e4 LT |
1525 | struct fc_internal *i = to_fc_internal(shost->transportt); |
1526 | ||
1527 | if (i->f->get_host_active_fc4s) | |
1528 | i->f->get_host_active_fc4s(shost); | |
1529 | ||
1530 | return (ssize_t)show_fc_fc4s(buf, fc_host_active_fc4s(shost)); | |
1531 | } | |
ee959b00 | 1532 | static FC_DEVICE_ATTR(host, active_fc4s, S_IRUGO, |
1da177e4 LT |
1533 | show_fc_host_active_fc4s, NULL); |
1534 | ||
1535 | static ssize_t | |
ee959b00 TJ |
1536 | show_fc_host_speed (struct device *dev, |
1537 | struct device_attribute *attr, char *buf) | |
1da177e4 | 1538 | { |
ee959b00 | 1539 | struct Scsi_Host *shost = transport_class_to_shost(dev); |
1da177e4 LT |
1540 | struct fc_internal *i = to_fc_internal(shost->transportt); |
1541 | ||
1542 | if (i->f->get_host_speed) | |
1543 | i->f->get_host_speed(shost); | |
1544 | ||
1545 | if (fc_host_speed(shost) == FC_PORTSPEED_UNKNOWN) | |
1546 | return snprintf(buf, 20, "unknown\n"); | |
1547 | ||
1548 | return get_fc_port_speed_names(fc_host_speed(shost), buf); | |
1549 | } | |
ee959b00 | 1550 | static FC_DEVICE_ATTR(host, speed, S_IRUGO, |
1da177e4 LT |
1551 | show_fc_host_speed, NULL); |
1552 | ||
1553 | ||
1554 | fc_host_rd_attr(port_id, "0x%06x\n", 20); | |
1555 | fc_host_rd_enum_attr(port_type, FC_PORTTYPE_MAX_NAMELEN); | |
1556 | fc_host_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN); | |
1557 | fc_host_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long); | |
016131b8 | 1558 | fc_host_rd_attr(symbolic_name, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1); |
1da177e4 | 1559 | |
b8d08210 JS |
1560 | fc_private_host_show_function(system_hostname, "%s\n", |
1561 | FC_SYMBOLIC_NAME_SIZE + 1, ) | |
1562 | fc_host_store_str_function(system_hostname, FC_SYMBOLIC_NAME_SIZE) | |
ee959b00 | 1563 | static FC_DEVICE_ATTR(host, system_hostname, S_IRUGO | S_IWUSR, |
b8d08210 JS |
1564 | show_fc_host_system_hostname, store_fc_host_system_hostname); |
1565 | ||
1da177e4 LT |
1566 | |
1567 | /* Private Host Attributes */ | |
1568 | ||
1569 | static ssize_t | |
ee959b00 TJ |
1570 | show_fc_private_host_tgtid_bind_type(struct device *dev, |
1571 | struct device_attribute *attr, char *buf) | |
1da177e4 | 1572 | { |
ee959b00 | 1573 | struct Scsi_Host *shost = transport_class_to_shost(dev); |
1da177e4 LT |
1574 | const char *name; |
1575 | ||
1576 | name = get_fc_tgtid_bind_type_name(fc_host_tgtid_bind_type(shost)); | |
1577 | if (!name) | |
1578 | return -EINVAL; | |
1579 | return snprintf(buf, FC_BINDTYPE_MAX_NAMELEN, "%s\n", name); | |
1580 | } | |
1581 | ||
d16794f6 JSEC |
1582 | #define get_list_head_entry(pos, head, member) \ |
1583 | pos = list_entry((head)->next, typeof(*pos), member) | |
1584 | ||
1da177e4 | 1585 | static ssize_t |
ee959b00 TJ |
1586 | store_fc_private_host_tgtid_bind_type(struct device *dev, |
1587 | struct device_attribute *attr, const char *buf, size_t count) | |
1da177e4 | 1588 | { |
ee959b00 | 1589 | struct Scsi_Host *shost = transport_class_to_shost(dev); |
d16794f6 | 1590 | struct fc_rport *rport; |
1da177e4 LT |
1591 | enum fc_tgtid_binding_type val; |
1592 | unsigned long flags; | |
1593 | ||
1594 | if (get_fc_tgtid_bind_type_match(buf, &val)) | |
1595 | return -EINVAL; | |
1596 | ||
1597 | /* if changing bind type, purge all unused consistent bindings */ | |
1598 | if (val != fc_host_tgtid_bind_type(shost)) { | |
1599 | spin_lock_irqsave(shost->host_lock, flags); | |
d16794f6 JSEC |
1600 | while (!list_empty(&fc_host_rport_bindings(shost))) { |
1601 | get_list_head_entry(rport, | |
1602 | &fc_host_rport_bindings(shost), peers); | |
aedf3497 JS |
1603 | list_del(&rport->peers); |
1604 | rport->port_state = FC_PORTSTATE_DELETED; | |
1605 | fc_queue_work(shost, &rport->rport_delete_work); | |
d16794f6 | 1606 | } |
1da177e4 LT |
1607 | spin_unlock_irqrestore(shost->host_lock, flags); |
1608 | } | |
1609 | ||
1610 | fc_host_tgtid_bind_type(shost) = val; | |
1611 | return count; | |
1612 | } | |
1613 | ||
ee959b00 | 1614 | static FC_DEVICE_ATTR(host, tgtid_bind_type, S_IRUGO | S_IWUSR, |
1da177e4 LT |
1615 | show_fc_private_host_tgtid_bind_type, |
1616 | store_fc_private_host_tgtid_bind_type); | |
1617 | ||
91ca7b01 | 1618 | static ssize_t |
ee959b00 TJ |
1619 | store_fc_private_host_issue_lip(struct device *dev, |
1620 | struct device_attribute *attr, const char *buf, size_t count) | |
91ca7b01 | 1621 | { |
ee959b00 | 1622 | struct Scsi_Host *shost = transport_class_to_shost(dev); |
91ca7b01 AV |
1623 | struct fc_internal *i = to_fc_internal(shost->transportt); |
1624 | int ret; | |
1625 | ||
1626 | /* ignore any data value written to the attribute */ | |
1627 | if (i->f->issue_fc_host_lip) { | |
1628 | ret = i->f->issue_fc_host_lip(shost); | |
1629 | return ret ? ret: count; | |
1630 | } | |
1631 | ||
1632 | return -ENOENT; | |
1633 | } | |
1634 | ||
ee959b00 | 1635 | static FC_DEVICE_ATTR(host, issue_lip, S_IWUSR, NULL, |
91ca7b01 AV |
1636 | store_fc_private_host_issue_lip); |
1637 | ||
43ca910a MC |
1638 | static ssize_t |
1639 | store_fc_private_host_dev_loss_tmo(struct device *dev, | |
1640 | struct device_attribute *attr, | |
1641 | const char *buf, size_t count) | |
1642 | { | |
1643 | struct Scsi_Host *shost = transport_class_to_shost(dev); | |
1644 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); | |
1645 | struct fc_rport *rport; | |
1646 | unsigned long val, flags; | |
1647 | int rc; | |
1648 | ||
1649 | rc = fc_str_to_dev_loss(buf, &val); | |
1650 | if (rc) | |
1651 | return rc; | |
1652 | ||
1653 | fc_host_dev_loss_tmo(shost) = val; | |
1654 | spin_lock_irqsave(shost->host_lock, flags); | |
1655 | list_for_each_entry(rport, &fc_host->rports, peers) | |
1656 | fc_rport_set_dev_loss_tmo(rport, val); | |
1657 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1658 | return count; | |
1659 | } | |
a53eb5e0 | 1660 | |
43ca910a MC |
1661 | fc_private_host_show_function(dev_loss_tmo, "%d\n", 20, ); |
1662 | static FC_DEVICE_ATTR(host, dev_loss_tmo, S_IRUGO | S_IWUSR, | |
1663 | show_fc_host_dev_loss_tmo, | |
1664 | store_fc_private_host_dev_loss_tmo); | |
1665 | ||
1666 | fc_private_host_rd_attr(npiv_vports_inuse, "%u\n", 20); | |
a53eb5e0 | 1667 | |
1da177e4 LT |
1668 | /* |
1669 | * Host Statistics Management | |
1670 | */ | |
1671 | ||
1672 | /* Show a given an attribute in the statistics group */ | |
1673 | static ssize_t | |
ee959b00 | 1674 | fc_stat_show(const struct device *dev, char *buf, unsigned long offset) |
1da177e4 | 1675 | { |
ee959b00 | 1676 | struct Scsi_Host *shost = transport_class_to_shost(dev); |
1da177e4 LT |
1677 | struct fc_internal *i = to_fc_internal(shost->transportt); |
1678 | struct fc_host_statistics *stats; | |
1679 | ssize_t ret = -ENOENT; | |
1680 | ||
1681 | if (offset > sizeof(struct fc_host_statistics) || | |
1682 | offset % sizeof(u64) != 0) | |
1683 | WARN_ON(1); | |
1684 | ||
1685 | if (i->f->get_fc_host_stats) { | |
1686 | stats = (i->f->get_fc_host_stats)(shost); | |
1687 | if (stats) | |
1688 | ret = snprintf(buf, 20, "0x%llx\n", | |
1689 | (unsigned long long)*(u64 *)(((u8 *) stats) + offset)); | |
1690 | } | |
1691 | return ret; | |
1692 | } | |
1693 | ||
1694 | ||
1695 | /* generate a read-only statistics attribute */ | |
1696 | #define fc_host_statistic(name) \ | |
ee959b00 TJ |
1697 | static ssize_t show_fcstat_##name(struct device *cd, \ |
1698 | struct device_attribute *attr, \ | |
1699 | char *buf) \ | |
1da177e4 LT |
1700 | { \ |
1701 | return fc_stat_show(cd, buf, \ | |
1702 | offsetof(struct fc_host_statistics, name)); \ | |
1703 | } \ | |
ee959b00 | 1704 | static FC_DEVICE_ATTR(host, name, S_IRUGO, show_fcstat_##name, NULL) |
1da177e4 LT |
1705 | |
1706 | fc_host_statistic(seconds_since_last_reset); | |
1707 | fc_host_statistic(tx_frames); | |
1708 | fc_host_statistic(tx_words); | |
1709 | fc_host_statistic(rx_frames); | |
1710 | fc_host_statistic(rx_words); | |
1711 | fc_host_statistic(lip_count); | |
1712 | fc_host_statistic(nos_count); | |
1713 | fc_host_statistic(error_frames); | |
1714 | fc_host_statistic(dumped_frames); | |
1715 | fc_host_statistic(link_failure_count); | |
1716 | fc_host_statistic(loss_of_sync_count); | |
1717 | fc_host_statistic(loss_of_signal_count); | |
1718 | fc_host_statistic(prim_seq_protocol_err_count); | |
1719 | fc_host_statistic(invalid_tx_word_count); | |
1720 | fc_host_statistic(invalid_crc_count); | |
1721 | fc_host_statistic(fcp_input_requests); | |
1722 | fc_host_statistic(fcp_output_requests); | |
1723 | fc_host_statistic(fcp_control_requests); | |
1724 | fc_host_statistic(fcp_input_megabytes); | |
1725 | fc_host_statistic(fcp_output_megabytes); | |
1726 | ||
1727 | static ssize_t | |
ee959b00 TJ |
1728 | fc_reset_statistics(struct device *dev, struct device_attribute *attr, |
1729 | const char *buf, size_t count) | |
1da177e4 | 1730 | { |
ee959b00 | 1731 | struct Scsi_Host *shost = transport_class_to_shost(dev); |
1da177e4 LT |
1732 | struct fc_internal *i = to_fc_internal(shost->transportt); |
1733 | ||
1734 | /* ignore any data value written to the attribute */ | |
1735 | if (i->f->reset_fc_host_stats) { | |
1736 | i->f->reset_fc_host_stats(shost); | |
1737 | return count; | |
1738 | } | |
1739 | ||
1740 | return -ENOENT; | |
1741 | } | |
ee959b00 | 1742 | static FC_DEVICE_ATTR(host, reset_statistics, S_IWUSR, NULL, |
1da177e4 LT |
1743 | fc_reset_statistics); |
1744 | ||
1da177e4 | 1745 | static struct attribute *fc_statistics_attrs[] = { |
ee959b00 TJ |
1746 | &device_attr_host_seconds_since_last_reset.attr, |
1747 | &device_attr_host_tx_frames.attr, | |
1748 | &device_attr_host_tx_words.attr, | |
1749 | &device_attr_host_rx_frames.attr, | |
1750 | &device_attr_host_rx_words.attr, | |
1751 | &device_attr_host_lip_count.attr, | |
1752 | &device_attr_host_nos_count.attr, | |
1753 | &device_attr_host_error_frames.attr, | |
1754 | &device_attr_host_dumped_frames.attr, | |
1755 | &device_attr_host_link_failure_count.attr, | |
1756 | &device_attr_host_loss_of_sync_count.attr, | |
1757 | &device_attr_host_loss_of_signal_count.attr, | |
1758 | &device_attr_host_prim_seq_protocol_err_count.attr, | |
1759 | &device_attr_host_invalid_tx_word_count.attr, | |
1760 | &device_attr_host_invalid_crc_count.attr, | |
1761 | &device_attr_host_fcp_input_requests.attr, | |
1762 | &device_attr_host_fcp_output_requests.attr, | |
1763 | &device_attr_host_fcp_control_requests.attr, | |
1764 | &device_attr_host_fcp_input_megabytes.attr, | |
1765 | &device_attr_host_fcp_output_megabytes.attr, | |
1766 | &device_attr_host_reset_statistics.attr, | |
1da177e4 LT |
1767 | NULL |
1768 | }; | |
1769 | ||
1770 | static struct attribute_group fc_statistics_group = { | |
1771 | .name = "statistics", | |
1772 | .attrs = fc_statistics_attrs, | |
1773 | }; | |
1774 | ||
a53eb5e0 JS |
1775 | |
1776 | /* Host Vport Attributes */ | |
1777 | ||
1778 | static int | |
1779 | fc_parse_wwn(const char *ns, u64 *nm) | |
1780 | { | |
1781 | unsigned int i, j; | |
1782 | u8 wwn[8]; | |
1783 | ||
1784 | memset(wwn, 0, sizeof(wwn)); | |
1785 | ||
1786 | /* Validate and store the new name */ | |
1787 | for (i=0, j=0; i < 16; i++) { | |
ecc30990 AS |
1788 | int value; |
1789 | ||
1790 | value = hex_to_bin(*ns++); | |
1791 | if (value >= 0) | |
1792 | j = (j << 4) | value; | |
a53eb5e0 JS |
1793 | else |
1794 | return -EINVAL; | |
1795 | if (i % 2) { | |
1796 | wwn[i/2] = j & 0xff; | |
1797 | j = 0; | |
1798 | } | |
1799 | } | |
1800 | ||
1801 | *nm = wwn_to_u64(wwn); | |
1802 | ||
1803 | return 0; | |
1804 | } | |
1805 | ||
1806 | ||
1807 | /* | |
1808 | * "Short-cut" sysfs variable to create a new vport on a FC Host. | |
1809 | * Input is a string of the form "<WWPN>:<WWNN>". Other attributes | |
1810 | * will default to a NPIV-based FCP_Initiator; The WWNs are specified | |
1811 | * as hex characters, and may *not* contain any prefixes (e.g. 0x, x, etc) | |
1812 | */ | |
1813 | static ssize_t | |
ee959b00 TJ |
1814 | store_fc_host_vport_create(struct device *dev, struct device_attribute *attr, |
1815 | const char *buf, size_t count) | |
a53eb5e0 | 1816 | { |
ee959b00 | 1817 | struct Scsi_Host *shost = transport_class_to_shost(dev); |
a53eb5e0 JS |
1818 | struct fc_vport_identifiers vid; |
1819 | struct fc_vport *vport; | |
1820 | unsigned int cnt=count; | |
1821 | int stat; | |
1822 | ||
1823 | memset(&vid, 0, sizeof(vid)); | |
1824 | ||
1825 | /* count may include a LF at end of string */ | |
1826 | if (buf[cnt-1] == '\n') | |
1827 | cnt--; | |
1828 | ||
1829 | /* validate we have enough characters for WWPN */ | |
1830 | if ((cnt != (16+1+16)) || (buf[16] != ':')) | |
1831 | return -EINVAL; | |
1832 | ||
1833 | stat = fc_parse_wwn(&buf[0], &vid.port_name); | |
1834 | if (stat) | |
1835 | return stat; | |
1836 | ||
1837 | stat = fc_parse_wwn(&buf[17], &vid.node_name); | |
1838 | if (stat) | |
1839 | return stat; | |
1840 | ||
1841 | vid.roles = FC_PORT_ROLE_FCP_INITIATOR; | |
1842 | vid.vport_type = FC_PORTTYPE_NPIV; | |
1843 | /* vid.symbolic_name is already zero/NULL's */ | |
1844 | vid.disable = false; /* always enabled */ | |
1845 | ||
1846 | /* we only allow support on Channel 0 !!! */ | |
a30c3f69 | 1847 | stat = fc_vport_setup(shost, 0, &shost->shost_gendev, &vid, &vport); |
a53eb5e0 JS |
1848 | return stat ? stat : count; |
1849 | } | |
ee959b00 | 1850 | static FC_DEVICE_ATTR(host, vport_create, S_IWUSR, NULL, |
a53eb5e0 JS |
1851 | store_fc_host_vport_create); |
1852 | ||
1853 | ||
1854 | /* | |
1855 | * "Short-cut" sysfs variable to delete a vport on a FC Host. | |
1856 | * Vport is identified by a string containing "<WWPN>:<WWNN>". | |
1857 | * The WWNs are specified as hex characters, and may *not* contain | |
1858 | * any prefixes (e.g. 0x, x, etc) | |
1859 | */ | |
1860 | static ssize_t | |
ee959b00 TJ |
1861 | store_fc_host_vport_delete(struct device *dev, struct device_attribute *attr, |
1862 | const char *buf, size_t count) | |
a53eb5e0 | 1863 | { |
ee959b00 | 1864 | struct Scsi_Host *shost = transport_class_to_shost(dev); |
a53eb5e0 JS |
1865 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
1866 | struct fc_vport *vport; | |
1867 | u64 wwpn, wwnn; | |
1868 | unsigned long flags; | |
1869 | unsigned int cnt=count; | |
1870 | int stat, match; | |
1871 | ||
1872 | /* count may include a LF at end of string */ | |
1873 | if (buf[cnt-1] == '\n') | |
1874 | cnt--; | |
1875 | ||
1876 | /* validate we have enough characters for WWPN */ | |
1877 | if ((cnt != (16+1+16)) || (buf[16] != ':')) | |
1878 | return -EINVAL; | |
1879 | ||
1880 | stat = fc_parse_wwn(&buf[0], &wwpn); | |
1881 | if (stat) | |
1882 | return stat; | |
1883 | ||
1884 | stat = fc_parse_wwn(&buf[17], &wwnn); | |
1885 | if (stat) | |
1886 | return stat; | |
1887 | ||
1888 | spin_lock_irqsave(shost->host_lock, flags); | |
1889 | match = 0; | |
1890 | /* we only allow support on Channel 0 !!! */ | |
1891 | list_for_each_entry(vport, &fc_host->vports, peers) { | |
1892 | if ((vport->channel == 0) && | |
1893 | (vport->port_name == wwpn) && (vport->node_name == wwnn)) { | |
0d9dc7c8 GR |
1894 | if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) |
1895 | break; | |
1896 | vport->flags |= FC_VPORT_DELETING; | |
a53eb5e0 JS |
1897 | match = 1; |
1898 | break; | |
1899 | } | |
1900 | } | |
1901 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1902 | ||
1903 | if (!match) | |
1904 | return -ENODEV; | |
1905 | ||
1906 | stat = fc_vport_terminate(vport); | |
1907 | return stat ? stat : count; | |
1908 | } | |
ee959b00 | 1909 | static FC_DEVICE_ATTR(host, vport_delete, S_IWUSR, NULL, |
a53eb5e0 JS |
1910 | store_fc_host_vport_delete); |
1911 | ||
1912 | ||
1da177e4 LT |
1913 | static int fc_host_match(struct attribute_container *cont, |
1914 | struct device *dev) | |
1915 | { | |
1916 | struct Scsi_Host *shost; | |
1917 | struct fc_internal *i; | |
1918 | ||
1919 | if (!scsi_is_host_device(dev)) | |
1920 | return 0; | |
1921 | ||
1922 | shost = dev_to_shost(dev); | |
1923 | if (!shost->transportt || shost->transportt->host_attrs.ac.class | |
1924 | != &fc_host_class.class) | |
1925 | return 0; | |
1926 | ||
1927 | i = to_fc_internal(shost->transportt); | |
1928 | ||
1929 | return &i->t.host_attrs.ac == cont; | |
1930 | } | |
1931 | ||
1932 | static int fc_target_match(struct attribute_container *cont, | |
1933 | struct device *dev) | |
1934 | { | |
1935 | struct Scsi_Host *shost; | |
1936 | struct fc_internal *i; | |
1937 | ||
1938 | if (!scsi_is_target_device(dev)) | |
1939 | return 0; | |
1940 | ||
1941 | shost = dev_to_shost(dev->parent); | |
1942 | if (!shost->transportt || shost->transportt->host_attrs.ac.class | |
1943 | != &fc_host_class.class) | |
1944 | return 0; | |
1945 | ||
1946 | i = to_fc_internal(shost->transportt); | |
1947 | ||
1948 | return &i->t.target_attrs.ac == cont; | |
1949 | } | |
1950 | ||
1951 | static void fc_rport_dev_release(struct device *dev) | |
1952 | { | |
1953 | struct fc_rport *rport = dev_to_rport(dev); | |
1954 | put_device(dev->parent); | |
1955 | kfree(rport); | |
1956 | } | |
1957 | ||
1958 | int scsi_is_fc_rport(const struct device *dev) | |
1959 | { | |
1960 | return dev->release == fc_rport_dev_release; | |
1961 | } | |
1962 | EXPORT_SYMBOL(scsi_is_fc_rport); | |
1963 | ||
1964 | static int fc_rport_match(struct attribute_container *cont, | |
1965 | struct device *dev) | |
1966 | { | |
1967 | struct Scsi_Host *shost; | |
1968 | struct fc_internal *i; | |
1969 | ||
1970 | if (!scsi_is_fc_rport(dev)) | |
1971 | return 0; | |
1972 | ||
1973 | shost = dev_to_shost(dev->parent); | |
1974 | if (!shost->transportt || shost->transportt->host_attrs.ac.class | |
1975 | != &fc_host_class.class) | |
1976 | return 0; | |
1977 | ||
1978 | i = to_fc_internal(shost->transportt); | |
1979 | ||
1980 | return &i->rport_attr_cont.ac == cont; | |
1981 | } | |
1982 | ||
5c44cd2a | 1983 | |
a53eb5e0 JS |
1984 | static void fc_vport_dev_release(struct device *dev) |
1985 | { | |
1986 | struct fc_vport *vport = dev_to_vport(dev); | |
1987 | put_device(dev->parent); /* release kobj parent */ | |
1988 | kfree(vport); | |
1989 | } | |
1990 | ||
1991 | int scsi_is_fc_vport(const struct device *dev) | |
1992 | { | |
1993 | return dev->release == fc_vport_dev_release; | |
1994 | } | |
1995 | EXPORT_SYMBOL(scsi_is_fc_vport); | |
1996 | ||
1997 | static int fc_vport_match(struct attribute_container *cont, | |
1998 | struct device *dev) | |
1999 | { | |
2000 | struct fc_vport *vport; | |
2001 | struct Scsi_Host *shost; | |
2002 | struct fc_internal *i; | |
2003 | ||
2004 | if (!scsi_is_fc_vport(dev)) | |
2005 | return 0; | |
2006 | vport = dev_to_vport(dev); | |
2007 | ||
2008 | shost = vport_to_shost(vport); | |
2009 | if (!shost->transportt || shost->transportt->host_attrs.ac.class | |
2010 | != &fc_host_class.class) | |
2011 | return 0; | |
2012 | ||
2013 | i = to_fc_internal(shost->transportt); | |
2014 | return &i->vport_attr_cont.ac == cont; | |
2015 | } | |
2016 | ||
2017 | ||
c829c394 JS |
2018 | /** |
2019 | * fc_timed_out - FC Transport I/O timeout intercept handler | |
c829c394 JS |
2020 | * @scmd: The SCSI command which timed out |
2021 | * | |
2022 | * This routine protects against error handlers getting invoked while a | |
2023 | * rport is in a blocked state, typically due to a temporarily loss of | |
2024 | * connectivity. If the error handlers are allowed to proceed, requests | |
2025 | * to abort i/o, reset the target, etc will likely fail as there is no way | |
2026 | * to communicate with the device to perform the requested function. These | |
2027 | * failures may result in the midlayer taking the device offline, requiring | |
2028 | * manual intervention to restore operation. | |
2029 | * | |
2030 | * This routine, called whenever an i/o times out, validates the state of | |
2031 | * the underlying rport. If the rport is blocked, it returns | |
2032 | * EH_RESET_TIMER, which will continue to reschedule the timeout. | |
2033 | * Eventually, either the device will return, or devloss_tmo will fire, | |
2034 | * and when the timeout then fires, it will be handled normally. | |
2035 | * If the rport is not blocked, normal error handling continues. | |
2036 | * | |
2037 | * Notes: | |
2038 | * This routine assumes no locks are held on entry. | |
eb44820c | 2039 | */ |
242f9dcb | 2040 | static enum blk_eh_timer_return |
c829c394 JS |
2041 | fc_timed_out(struct scsi_cmnd *scmd) |
2042 | { | |
2043 | struct fc_rport *rport = starget_to_rport(scsi_target(scmd->device)); | |
2044 | ||
2045 | if (rport->port_state == FC_PORTSTATE_BLOCKED) | |
242f9dcb | 2046 | return BLK_EH_RESET_TIMER; |
c829c394 | 2047 | |
242f9dcb | 2048 | return BLK_EH_NOT_HANDLED; |
c829c394 JS |
2049 | } |
2050 | ||
5c44cd2a | 2051 | /* |
bda23253 JS |
2052 | * Called by fc_user_scan to locate an rport on the shost that |
2053 | * matches the channel and target id, and invoke scsi_scan_target() | |
2054 | * on the rport. | |
5c44cd2a | 2055 | */ |
bda23253 JS |
2056 | static void |
2057 | fc_user_scan_tgt(struct Scsi_Host *shost, uint channel, uint id, uint lun) | |
5c44cd2a JSEC |
2058 | { |
2059 | struct fc_rport *rport; | |
bda23253 JS |
2060 | unsigned long flags; |
2061 | ||
2062 | spin_lock_irqsave(shost->host_lock, flags); | |
5c44cd2a | 2063 | |
e02f3f59 CH |
2064 | list_for_each_entry(rport, &fc_host_rports(shost), peers) { |
2065 | if (rport->scsi_target_id == -1) | |
2066 | continue; | |
5c44cd2a | 2067 | |
0d2fcd9f HR |
2068 | if (rport->port_state != FC_PORTSTATE_ONLINE) |
2069 | continue; | |
2070 | ||
bda23253 JS |
2071 | if ((channel == rport->channel) && |
2072 | (id == rport->scsi_target_id)) { | |
2073 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2074 | scsi_scan_target(&rport->dev, channel, id, lun, 1); | |
2075 | return; | |
e02f3f59 CH |
2076 | } |
2077 | } | |
2078 | ||
bda23253 JS |
2079 | spin_unlock_irqrestore(shost->host_lock, flags); |
2080 | } | |
2081 | ||
2082 | /* | |
2083 | * Called via sysfs scan routines. Necessary, as the FC transport | |
2084 | * wants to place all target objects below the rport object. So this | |
2085 | * routine must invoke the scsi_scan_target() routine with the rport | |
2086 | * object as the parent. | |
2087 | */ | |
2088 | static int | |
2089 | fc_user_scan(struct Scsi_Host *shost, uint channel, uint id, uint lun) | |
2090 | { | |
2091 | uint chlo, chhi; | |
2092 | uint tgtlo, tgthi; | |
2093 | ||
2094 | if (((channel != SCAN_WILD_CARD) && (channel > shost->max_channel)) || | |
2095 | ((id != SCAN_WILD_CARD) && (id >= shost->max_id)) || | |
2096 | ((lun != SCAN_WILD_CARD) && (lun > shost->max_lun))) | |
2097 | return -EINVAL; | |
2098 | ||
2099 | if (channel == SCAN_WILD_CARD) { | |
2100 | chlo = 0; | |
2101 | chhi = shost->max_channel + 1; | |
2102 | } else { | |
2103 | chlo = channel; | |
2104 | chhi = channel + 1; | |
2105 | } | |
2106 | ||
2107 | if (id == SCAN_WILD_CARD) { | |
2108 | tgtlo = 0; | |
2109 | tgthi = shost->max_id; | |
2110 | } else { | |
2111 | tgtlo = id; | |
2112 | tgthi = id + 1; | |
2113 | } | |
2114 | ||
2115 | for ( ; chlo < chhi; chlo++) | |
2116 | for ( ; tgtlo < tgthi; tgtlo++) | |
2117 | fc_user_scan_tgt(shost, chlo, tgtlo, lun); | |
2118 | ||
e02f3f59 | 2119 | return 0; |
5c44cd2a JSEC |
2120 | } |
2121 | ||
7525236d FT |
2122 | static int fc_tsk_mgmt_response(struct Scsi_Host *shost, u64 nexus, u64 tm_id, |
2123 | int result) | |
2124 | { | |
2125 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
2126 | return i->f->tsk_mgmt_response(shost, nexus, tm_id, result); | |
2127 | } | |
2128 | ||
2129 | static int fc_it_nexus_response(struct Scsi_Host *shost, u64 nexus, int result) | |
2130 | { | |
2131 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
2132 | return i->f->it_nexus_response(shost, nexus, result); | |
2133 | } | |
2134 | ||
1da177e4 LT |
2135 | struct scsi_transport_template * |
2136 | fc_attach_transport(struct fc_function_template *ft) | |
2137 | { | |
1da177e4 | 2138 | int count; |
24669f75 JS |
2139 | struct fc_internal *i = kzalloc(sizeof(struct fc_internal), |
2140 | GFP_KERNEL); | |
1da177e4 LT |
2141 | |
2142 | if (unlikely(!i)) | |
2143 | return NULL; | |
2144 | ||
1da177e4 LT |
2145 | i->t.target_attrs.ac.attrs = &i->starget_attrs[0]; |
2146 | i->t.target_attrs.ac.class = &fc_transport_class.class; | |
2147 | i->t.target_attrs.ac.match = fc_target_match; | |
2148 | i->t.target_size = sizeof(struct fc_starget_attrs); | |
2149 | transport_container_register(&i->t.target_attrs); | |
2150 | ||
2151 | i->t.host_attrs.ac.attrs = &i->host_attrs[0]; | |
2152 | i->t.host_attrs.ac.class = &fc_host_class.class; | |
2153 | i->t.host_attrs.ac.match = fc_host_match; | |
2154 | i->t.host_size = sizeof(struct fc_host_attrs); | |
2155 | if (ft->get_fc_host_stats) | |
2156 | i->t.host_attrs.statistics = &fc_statistics_group; | |
2157 | transport_container_register(&i->t.host_attrs); | |
2158 | ||
2159 | i->rport_attr_cont.ac.attrs = &i->rport_attrs[0]; | |
2160 | i->rport_attr_cont.ac.class = &fc_rport_class.class; | |
2161 | i->rport_attr_cont.ac.match = fc_rport_match; | |
2162 | transport_container_register(&i->rport_attr_cont); | |
2163 | ||
a53eb5e0 JS |
2164 | i->vport_attr_cont.ac.attrs = &i->vport_attrs[0]; |
2165 | i->vport_attr_cont.ac.class = &fc_vport_class.class; | |
2166 | i->vport_attr_cont.ac.match = fc_vport_match; | |
2167 | transport_container_register(&i->vport_attr_cont); | |
2168 | ||
1da177e4 LT |
2169 | i->f = ft; |
2170 | ||
2171 | /* Transport uses the shost workq for scsi scanning */ | |
2172 | i->t.create_work_queue = 1; | |
5c44cd2a | 2173 | |
c829c394 JS |
2174 | i->t.eh_timed_out = fc_timed_out; |
2175 | ||
e02f3f59 | 2176 | i->t.user_scan = fc_user_scan; |
9ef3e4a4 | 2177 | |
7525236d FT |
2178 | /* target-mode drivers' functions */ |
2179 | i->t.tsk_mgmt_response = fc_tsk_mgmt_response; | |
2180 | i->t.it_nexus_response = fc_it_nexus_response; | |
2181 | ||
1da177e4 LT |
2182 | /* |
2183 | * Setup SCSI Target Attributes. | |
2184 | */ | |
2185 | count = 0; | |
2186 | SETUP_STARGET_ATTRIBUTE_RD(node_name); | |
2187 | SETUP_STARGET_ATTRIBUTE_RD(port_name); | |
2188 | SETUP_STARGET_ATTRIBUTE_RD(port_id); | |
2189 | ||
2190 | BUG_ON(count > FC_STARGET_NUM_ATTRS); | |
2191 | ||
2192 | i->starget_attrs[count] = NULL; | |
2193 | ||
2194 | ||
2195 | /* | |
2196 | * Setup SCSI Host Attributes. | |
2197 | */ | |
2198 | count=0; | |
2199 | SETUP_HOST_ATTRIBUTE_RD(node_name); | |
2200 | SETUP_HOST_ATTRIBUTE_RD(port_name); | |
6b7281d0 | 2201 | SETUP_HOST_ATTRIBUTE_RD(permanent_port_name); |
1da177e4 LT |
2202 | SETUP_HOST_ATTRIBUTE_RD(supported_classes); |
2203 | SETUP_HOST_ATTRIBUTE_RD(supported_fc4s); | |
1da177e4 LT |
2204 | SETUP_HOST_ATTRIBUTE_RD(supported_speeds); |
2205 | SETUP_HOST_ATTRIBUTE_RD(maxframe_size); | |
a53eb5e0 JS |
2206 | if (ft->vport_create) { |
2207 | SETUP_HOST_ATTRIBUTE_RD_NS(max_npiv_vports); | |
2208 | SETUP_HOST_ATTRIBUTE_RD_NS(npiv_vports_inuse); | |
2209 | } | |
1da177e4 LT |
2210 | SETUP_HOST_ATTRIBUTE_RD(serial_number); |
2211 | ||
2212 | SETUP_HOST_ATTRIBUTE_RD(port_id); | |
2213 | SETUP_HOST_ATTRIBUTE_RD(port_type); | |
2214 | SETUP_HOST_ATTRIBUTE_RD(port_state); | |
2215 | SETUP_HOST_ATTRIBUTE_RD(active_fc4s); | |
2216 | SETUP_HOST_ATTRIBUTE_RD(speed); | |
2217 | SETUP_HOST_ATTRIBUTE_RD(fabric_name); | |
016131b8 | 2218 | SETUP_HOST_ATTRIBUTE_RD(symbolic_name); |
b8d08210 | 2219 | SETUP_HOST_ATTRIBUTE_RW(system_hostname); |
1da177e4 LT |
2220 | |
2221 | /* Transport-managed attributes */ | |
43ca910a | 2222 | SETUP_PRIVATE_HOST_ATTRIBUTE_RW(dev_loss_tmo); |
1da177e4 | 2223 | SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type); |
91ca7b01 AV |
2224 | if (ft->issue_fc_host_lip) |
2225 | SETUP_PRIVATE_HOST_ATTRIBUTE_RW(issue_lip); | |
a53eb5e0 JS |
2226 | if (ft->vport_create) |
2227 | SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_create); | |
2228 | if (ft->vport_delete) | |
2229 | SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_delete); | |
1da177e4 LT |
2230 | |
2231 | BUG_ON(count > FC_HOST_NUM_ATTRS); | |
2232 | ||
2233 | i->host_attrs[count] = NULL; | |
2234 | ||
2235 | /* | |
2236 | * Setup Remote Port Attributes. | |
2237 | */ | |
2238 | count=0; | |
2239 | SETUP_RPORT_ATTRIBUTE_RD(maxframe_size); | |
2240 | SETUP_RPORT_ATTRIBUTE_RD(supported_classes); | |
2241 | SETUP_RPORT_ATTRIBUTE_RW(dev_loss_tmo); | |
2242 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(node_name); | |
2243 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_name); | |
2244 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_id); | |
2245 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(roles); | |
2246 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_state); | |
2247 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(scsi_target_id); | |
fff9d40c | 2248 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(fast_io_fail_tmo); |
1da177e4 LT |
2249 | |
2250 | BUG_ON(count > FC_RPORT_NUM_ATTRS); | |
2251 | ||
2252 | i->rport_attrs[count] = NULL; | |
2253 | ||
a53eb5e0 JS |
2254 | /* |
2255 | * Setup Virtual Port Attributes. | |
2256 | */ | |
2257 | count=0; | |
2258 | SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_state); | |
2259 | SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_last_state); | |
2260 | SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(node_name); | |
2261 | SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(port_name); | |
2262 | SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(roles); | |
2263 | SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_type); | |
2264 | SETUP_VPORT_ATTRIBUTE_RW(symbolic_name); | |
2265 | SETUP_VPORT_ATTRIBUTE_WR(vport_delete); | |
2266 | SETUP_VPORT_ATTRIBUTE_WR(vport_disable); | |
2267 | ||
2268 | BUG_ON(count > FC_VPORT_NUM_ATTRS); | |
2269 | ||
2270 | i->vport_attrs[count] = NULL; | |
2271 | ||
1da177e4 LT |
2272 | return &i->t; |
2273 | } | |
2274 | EXPORT_SYMBOL(fc_attach_transport); | |
2275 | ||
2276 | void fc_release_transport(struct scsi_transport_template *t) | |
2277 | { | |
2278 | struct fc_internal *i = to_fc_internal(t); | |
2279 | ||
2280 | transport_container_unregister(&i->t.target_attrs); | |
2281 | transport_container_unregister(&i->t.host_attrs); | |
2282 | transport_container_unregister(&i->rport_attr_cont); | |
a53eb5e0 | 2283 | transport_container_unregister(&i->vport_attr_cont); |
1da177e4 LT |
2284 | |
2285 | kfree(i); | |
2286 | } | |
2287 | EXPORT_SYMBOL(fc_release_transport); | |
2288 | ||
aedf3497 JS |
2289 | /** |
2290 | * fc_queue_work - Queue work to the fc_host workqueue. | |
2291 | * @shost: Pointer to Scsi_Host bound to fc_host. | |
2292 | * @work: Work to queue for execution. | |
2293 | * | |
2294 | * Return value: | |
a0785edf JS |
2295 | * 1 - work queued for execution |
2296 | * 0 - work is already queued | |
2297 | * -EINVAL - work queue doesn't exist | |
eb44820c | 2298 | */ |
aedf3497 JS |
2299 | static int |
2300 | fc_queue_work(struct Scsi_Host *shost, struct work_struct *work) | |
2301 | { | |
2302 | if (unlikely(!fc_host_work_q(shost))) { | |
2303 | printk(KERN_ERR | |
2304 | "ERROR: FC host '%s' attempted to queue work, " | |
2305 | "when no workqueue created.\n", shost->hostt->name); | |
2306 | dump_stack(); | |
2307 | ||
2308 | return -EINVAL; | |
2309 | } | |
2310 | ||
2311 | return queue_work(fc_host_work_q(shost), work); | |
2312 | } | |
2313 | ||
2314 | /** | |
2315 | * fc_flush_work - Flush a fc_host's workqueue. | |
2316 | * @shost: Pointer to Scsi_Host bound to fc_host. | |
eb44820c | 2317 | */ |
aedf3497 JS |
2318 | static void |
2319 | fc_flush_work(struct Scsi_Host *shost) | |
2320 | { | |
2321 | if (!fc_host_work_q(shost)) { | |
2322 | printk(KERN_ERR | |
2323 | "ERROR: FC host '%s' attempted to flush work, " | |
2324 | "when no workqueue created.\n", shost->hostt->name); | |
2325 | dump_stack(); | |
2326 | return; | |
2327 | } | |
2328 | ||
2329 | flush_workqueue(fc_host_work_q(shost)); | |
2330 | } | |
2331 | ||
2332 | /** | |
2333 | * fc_queue_devloss_work - Schedule work for the fc_host devloss workqueue. | |
2334 | * @shost: Pointer to Scsi_Host bound to fc_host. | |
2335 | * @work: Work to queue for execution. | |
2336 | * @delay: jiffies to delay the work queuing | |
2337 | * | |
2338 | * Return value: | |
0f29b966 | 2339 | * 1 on success / 0 already queued / < 0 for error |
eb44820c | 2340 | */ |
aedf3497 | 2341 | static int |
c4028958 | 2342 | fc_queue_devloss_work(struct Scsi_Host *shost, struct delayed_work *work, |
aedf3497 JS |
2343 | unsigned long delay) |
2344 | { | |
2345 | if (unlikely(!fc_host_devloss_work_q(shost))) { | |
2346 | printk(KERN_ERR | |
2347 | "ERROR: FC host '%s' attempted to queue work, " | |
2348 | "when no workqueue created.\n", shost->hostt->name); | |
2349 | dump_stack(); | |
2350 | ||
2351 | return -EINVAL; | |
2352 | } | |
2353 | ||
2354 | return queue_delayed_work(fc_host_devloss_work_q(shost), work, delay); | |
2355 | } | |
2356 | ||
2357 | /** | |
2358 | * fc_flush_devloss - Flush a fc_host's devloss workqueue. | |
2359 | * @shost: Pointer to Scsi_Host bound to fc_host. | |
eb44820c | 2360 | */ |
aedf3497 JS |
2361 | static void |
2362 | fc_flush_devloss(struct Scsi_Host *shost) | |
2363 | { | |
2364 | if (!fc_host_devloss_work_q(shost)) { | |
2365 | printk(KERN_ERR | |
2366 | "ERROR: FC host '%s' attempted to flush work, " | |
2367 | "when no workqueue created.\n", shost->hostt->name); | |
2368 | dump_stack(); | |
2369 | return; | |
2370 | } | |
2371 | ||
2372 | flush_workqueue(fc_host_devloss_work_q(shost)); | |
2373 | } | |
2374 | ||
1da177e4 LT |
2375 | |
2376 | /** | |
eb44820c RL |
2377 | * fc_remove_host - called to terminate any fc_transport-related elements for a scsi host. |
2378 | * @shost: Which &Scsi_Host | |
1da177e4 | 2379 | * |
25985edc | 2380 | * This routine is expected to be called immediately preceding the |
1da177e4 LT |
2381 | * a driver's call to scsi_remove_host(). |
2382 | * | |
2383 | * WARNING: A driver utilizing the fc_transport, which fails to call | |
eb44820c | 2384 | * this routine prior to scsi_remove_host(), will leave dangling |
1da177e4 LT |
2385 | * objects in /sys/class/fc_remote_ports. Access to any of these |
2386 | * objects can result in a system crash !!! | |
2387 | * | |
2388 | * Notes: | |
2389 | * This routine assumes no locks are held on entry. | |
eb44820c | 2390 | */ |
1da177e4 LT |
2391 | void |
2392 | fc_remove_host(struct Scsi_Host *shost) | |
2393 | { | |
a53eb5e0 JS |
2394 | struct fc_vport *vport = NULL, *next_vport = NULL; |
2395 | struct fc_rport *rport = NULL, *next_rport = NULL; | |
aedf3497 JS |
2396 | struct workqueue_struct *work_q; |
2397 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); | |
a53eb5e0 | 2398 | unsigned long flags; |
a53eb5e0 JS |
2399 | |
2400 | spin_lock_irqsave(shost->host_lock, flags); | |
2401 | ||
2402 | /* Remove any vports */ | |
9ef3e4a4 JS |
2403 | list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers) |
2404 | fc_queue_work(shost, &vport->vport_delete_work); | |
1da177e4 LT |
2405 | |
2406 | /* Remove any remote ports */ | |
2407 | list_for_each_entry_safe(rport, next_rport, | |
aedf3497 JS |
2408 | &fc_host->rports, peers) { |
2409 | list_del(&rport->peers); | |
2410 | rport->port_state = FC_PORTSTATE_DELETED; | |
2411 | fc_queue_work(shost, &rport->rport_delete_work); | |
2412 | } | |
2413 | ||
1da177e4 | 2414 | list_for_each_entry_safe(rport, next_rport, |
aedf3497 JS |
2415 | &fc_host->rport_bindings, peers) { |
2416 | list_del(&rport->peers); | |
2417 | rport->port_state = FC_PORTSTATE_DELETED; | |
2418 | fc_queue_work(shost, &rport->rport_delete_work); | |
2419 | } | |
2420 | ||
a53eb5e0 JS |
2421 | spin_unlock_irqrestore(shost->host_lock, flags); |
2422 | ||
aedf3497 JS |
2423 | /* flush all scan work items */ |
2424 | scsi_flush_work(shost); | |
2425 | ||
2426 | /* flush all stgt delete, and rport delete work items, then kill it */ | |
2427 | if (fc_host->work_q) { | |
2428 | work_q = fc_host->work_q; | |
2429 | fc_host->work_q = NULL; | |
2430 | destroy_workqueue(work_q); | |
2431 | } | |
2432 | ||
2433 | /* flush all devloss work items, then kill it */ | |
2434 | if (fc_host->devloss_work_q) { | |
2435 | work_q = fc_host->devloss_work_q; | |
2436 | fc_host->devloss_work_q = NULL; | |
2437 | destroy_workqueue(work_q); | |
2438 | } | |
1da177e4 LT |
2439 | } |
2440 | EXPORT_SYMBOL(fc_remove_host); | |
2441 | ||
fff9d40c MC |
2442 | static void fc_terminate_rport_io(struct fc_rport *rport) |
2443 | { | |
2444 | struct Scsi_Host *shost = rport_to_shost(rport); | |
2445 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
2446 | ||
2447 | /* Involve the LLDD if possible to terminate all io on the rport. */ | |
2448 | if (i->f->terminate_rport_io) | |
2449 | i->f->terminate_rport_io(rport); | |
2450 | ||
2451 | /* | |
2452 | * must unblock to flush queued IO. The caller will have set | |
2453 | * the port_state or flags, so that fc_remote_port_chkready will | |
2454 | * fail IO. | |
2455 | */ | |
2456 | scsi_target_unblock(&rport->dev); | |
2457 | } | |
aedf3497 JS |
2458 | |
2459 | /** | |
25985edc | 2460 | * fc_starget_delete - called to delete the scsi descendants of an rport |
c4028958 | 2461 | * @work: remote port to be operated on. |
eb44820c RL |
2462 | * |
2463 | * Deletes target and all sdevs. | |
2464 | */ | |
19a7b4ae | 2465 | static void |
c4028958 | 2466 | fc_starget_delete(struct work_struct *work) |
19a7b4ae | 2467 | { |
c4028958 DH |
2468 | struct fc_rport *rport = |
2469 | container_of(work, struct fc_rport, stgt_delete_work); | |
19a7b4ae | 2470 | |
fff9d40c | 2471 | fc_terminate_rport_io(rport); |
19a7b4ae JSEC |
2472 | scsi_remove_target(&rport->dev); |
2473 | } | |
2474 | ||
aedf3497 JS |
2475 | |
2476 | /** | |
2477 | * fc_rport_final_delete - finish rport termination and delete it. | |
c4028958 | 2478 | * @work: remote port to be deleted. |
eb44820c | 2479 | */ |
aedf3497 | 2480 | static void |
c4028958 | 2481 | fc_rport_final_delete(struct work_struct *work) |
aedf3497 | 2482 | { |
c4028958 DH |
2483 | struct fc_rport *rport = |
2484 | container_of(work, struct fc_rport, rport_delete_work); | |
aedf3497 JS |
2485 | struct device *dev = &rport->dev; |
2486 | struct Scsi_Host *shost = rport_to_shost(rport); | |
0f29b966 | 2487 | struct fc_internal *i = to_fc_internal(shost->transportt); |
92740b24 | 2488 | unsigned long flags; |
8798a694 | 2489 | int do_callback = 0; |
aedf3497 | 2490 | |
112f661d NNS |
2491 | fc_terminate_rport_io(rport); |
2492 | ||
aedf3497 | 2493 | /* |
9ef3e4a4 | 2494 | * if a scan is pending, flush the SCSI Host work_q so that |
aedf3497 JS |
2495 | * that we can reclaim the rport scan work element. |
2496 | */ | |
2497 | if (rport->flags & FC_RPORT_SCAN_PENDING) | |
2498 | scsi_flush_work(shost); | |
2499 | ||
92740b24 JS |
2500 | /* |
2501 | * Cancel any outstanding timers. These should really exist | |
2502 | * only when rmmod'ing the LLDD and we're asking for | |
2503 | * immediate termination of the rports | |
2504 | */ | |
2505 | spin_lock_irqsave(shost->host_lock, flags); | |
2506 | if (rport->flags & FC_RPORT_DEVLOSS_PENDING) { | |
2507 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2508 | if (!cancel_delayed_work(&rport->fail_io_work)) | |
2509 | fc_flush_devloss(shost); | |
2510 | if (!cancel_delayed_work(&rport->dev_loss_work)) | |
2511 | fc_flush_devloss(shost); | |
2512 | spin_lock_irqsave(shost->host_lock, flags); | |
2513 | rport->flags &= ~FC_RPORT_DEVLOSS_PENDING; | |
2514 | } | |
2515 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2516 | ||
0f29b966 JS |
2517 | /* Delete SCSI target and sdevs */ |
2518 | if (rport->scsi_target_id != -1) | |
c4028958 | 2519 | fc_starget_delete(&rport->stgt_delete_work); |
92740b24 JS |
2520 | |
2521 | /* | |
2522 | * Notify the driver that the rport is now dead. The LLDD will | |
2523 | * also guarantee that any communication to the rport is terminated | |
4be98c0c JS |
2524 | * |
2525 | * Avoid this call if we already called it when we preserved the | |
2526 | * rport for the binding. | |
92740b24 | 2527 | */ |
8798a694 | 2528 | spin_lock_irqsave(shost->host_lock, flags); |
4be98c0c | 2529 | if (!(rport->flags & FC_RPORT_DEVLOSS_CALLBK_DONE) && |
8798a694 MR |
2530 | (i->f->dev_loss_tmo_callbk)) { |
2531 | rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE; | |
2532 | do_callback = 1; | |
2533 | } | |
2534 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2535 | ||
2536 | if (do_callback) | |
0f29b966 | 2537 | i->f->dev_loss_tmo_callbk(rport); |
0f29b966 | 2538 | |
9e4f5e29 JS |
2539 | fc_bsg_remove(rport->rqst_q); |
2540 | ||
aedf3497 JS |
2541 | transport_remove_device(dev); |
2542 | device_del(dev); | |
2543 | transport_destroy_device(dev); | |
3bdad7bd JS |
2544 | put_device(&shost->shost_gendev); /* for fc_host->rport list */ |
2545 | put_device(dev); /* for self-reference */ | |
aedf3497 JS |
2546 | } |
2547 | ||
2548 | ||
1da177e4 LT |
2549 | /** |
2550 | * fc_rport_create - allocates and creates a remote FC port. | |
2551 | * @shost: scsi host the remote port is connected to. | |
2552 | * @channel: Channel on shost port connected to. | |
2553 | * @ids: The world wide names, fc address, and FC4 port | |
2554 | * roles for the remote port. | |
2555 | * | |
2556 | * Allocates and creates the remoter port structure, including the | |
2557 | * class and sysfs creation. | |
2558 | * | |
2559 | * Notes: | |
2560 | * This routine assumes no locks are held on entry. | |
eb44820c | 2561 | */ |
44818efb | 2562 | static struct fc_rport * |
1da177e4 LT |
2563 | fc_rport_create(struct Scsi_Host *shost, int channel, |
2564 | struct fc_rport_identifiers *ids) | |
2565 | { | |
aedf3497 | 2566 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
1da177e4 LT |
2567 | struct fc_internal *fci = to_fc_internal(shost->transportt); |
2568 | struct fc_rport *rport; | |
2569 | struct device *dev; | |
2570 | unsigned long flags; | |
2571 | int error; | |
2572 | size_t size; | |
2573 | ||
2574 | size = (sizeof(struct fc_rport) + fci->f->dd_fcrport_size); | |
24669f75 | 2575 | rport = kzalloc(size, GFP_KERNEL); |
1da177e4 | 2576 | if (unlikely(!rport)) { |
cadbd4a5 | 2577 | printk(KERN_ERR "%s: allocation failure\n", __func__); |
1da177e4 LT |
2578 | return NULL; |
2579 | } | |
1da177e4 LT |
2580 | |
2581 | rport->maxframe_size = -1; | |
2582 | rport->supported_classes = FC_COS_UNSPECIFIED; | |
43ca910a | 2583 | rport->dev_loss_tmo = fc_host->dev_loss_tmo; |
1da177e4 LT |
2584 | memcpy(&rport->node_name, &ids->node_name, sizeof(rport->node_name)); |
2585 | memcpy(&rport->port_name, &ids->port_name, sizeof(rport->port_name)); | |
2586 | rport->port_id = ids->port_id; | |
2587 | rport->roles = ids->roles; | |
2588 | rport->port_state = FC_PORTSTATE_ONLINE; | |
2589 | if (fci->f->dd_fcrport_size) | |
2590 | rport->dd_data = &rport[1]; | |
2591 | rport->channel = channel; | |
0f29b966 | 2592 | rport->fast_io_fail_tmo = -1; |
1da177e4 | 2593 | |
c4028958 DH |
2594 | INIT_DELAYED_WORK(&rport->dev_loss_work, fc_timeout_deleted_rport); |
2595 | INIT_DELAYED_WORK(&rport->fail_io_work, fc_timeout_fail_rport_io); | |
2596 | INIT_WORK(&rport->scan_work, fc_scsi_scan_rport); | |
2597 | INIT_WORK(&rport->stgt_delete_work, fc_starget_delete); | |
2598 | INIT_WORK(&rport->rport_delete_work, fc_rport_final_delete); | |
1da177e4 LT |
2599 | |
2600 | spin_lock_irqsave(shost->host_lock, flags); | |
2601 | ||
2602 | rport->number = fc_host->next_rport_number++; | |
a53eb5e0 | 2603 | if (rport->roles & FC_PORT_ROLE_FCP_TARGET) |
1da177e4 LT |
2604 | rport->scsi_target_id = fc_host->next_target_id++; |
2605 | else | |
2606 | rport->scsi_target_id = -1; | |
aedf3497 | 2607 | list_add_tail(&rport->peers, &fc_host->rports); |
3bdad7bd | 2608 | get_device(&shost->shost_gendev); /* for fc_host->rport list */ |
1da177e4 LT |
2609 | |
2610 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2611 | ||
2612 | dev = &rport->dev; | |
3bdad7bd JS |
2613 | device_initialize(dev); /* takes self reference */ |
2614 | dev->parent = get_device(&shost->shost_gendev); /* parent reference */ | |
1da177e4 | 2615 | dev->release = fc_rport_dev_release; |
71610f55 KS |
2616 | dev_set_name(dev, "rport-%d:%d-%d", |
2617 | shost->host_no, channel, rport->number); | |
1da177e4 LT |
2618 | transport_setup_device(dev); |
2619 | ||
2620 | error = device_add(dev); | |
2621 | if (error) { | |
2622 | printk(KERN_ERR "FC Remote Port device_add failed\n"); | |
2623 | goto delete_rport; | |
2624 | } | |
2625 | transport_add_device(dev); | |
2626 | transport_configure_device(dev); | |
2627 | ||
9e4f5e29 JS |
2628 | fc_bsg_rportadd(shost, rport); |
2629 | /* ignore any bsg add error - we just can't do sgio */ | |
2630 | ||
a53eb5e0 | 2631 | if (rport->roles & FC_PORT_ROLE_FCP_TARGET) { |
1da177e4 | 2632 | /* initiate a scan of the target */ |
aedf3497 | 2633 | rport->flags |= FC_RPORT_SCAN_PENDING; |
1da177e4 | 2634 | scsi_queue_work(shost, &rport->scan_work); |
aedf3497 | 2635 | } |
1da177e4 LT |
2636 | |
2637 | return rport; | |
2638 | ||
2639 | delete_rport: | |
2640 | transport_destroy_device(dev); | |
1da177e4 LT |
2641 | spin_lock_irqsave(shost->host_lock, flags); |
2642 | list_del(&rport->peers); | |
3bdad7bd | 2643 | put_device(&shost->shost_gendev); /* for fc_host->rport list */ |
1da177e4 LT |
2644 | spin_unlock_irqrestore(shost->host_lock, flags); |
2645 | put_device(dev->parent); | |
2646 | kfree(rport); | |
2647 | return NULL; | |
2648 | } | |
2649 | ||
2650 | /** | |
eb44820c | 2651 | * fc_remote_port_add - notify fc transport of the existence of a remote FC port. |
1da177e4 LT |
2652 | * @shost: scsi host the remote port is connected to. |
2653 | * @channel: Channel on shost port connected to. | |
2654 | * @ids: The world wide names, fc address, and FC4 port | |
2655 | * roles for the remote port. | |
2656 | * | |
2657 | * The LLDD calls this routine to notify the transport of the existence | |
2658 | * of a remote port. The LLDD provides the unique identifiers (wwpn,wwn) | |
2659 | * of the port, it's FC address (port_id), and the FC4 roles that are | |
2660 | * active for the port. | |
2661 | * | |
2662 | * For ports that are FCP targets (aka scsi targets), the FC transport | |
2663 | * maintains consistent target id bindings on behalf of the LLDD. | |
2664 | * A consistent target id binding is an assignment of a target id to | |
2665 | * a remote port identifier, which persists while the scsi host is | |
2666 | * attached. The remote port can disappear, then later reappear, and | |
2667 | * it's target id assignment remains the same. This allows for shifts | |
2668 | * in FC addressing (if binding by wwpn or wwnn) with no apparent | |
2669 | * changes to the scsi subsystem which is based on scsi host number and | |
2670 | * target id values. Bindings are only valid during the attachment of | |
2671 | * the scsi host. If the host detaches, then later re-attaches, target | |
2672 | * id bindings may change. | |
2673 | * | |
2674 | * This routine is responsible for returning a remote port structure. | |
2675 | * The routine will search the list of remote ports it maintains | |
2676 | * internally on behalf of consistent target id mappings. If found, the | |
2677 | * remote port structure will be reused. Otherwise, a new remote port | |
2678 | * structure will be allocated. | |
2679 | * | |
2680 | * Whenever a remote port is allocated, a new fc_remote_port class | |
2681 | * device is created. | |
2682 | * | |
2683 | * Should not be called from interrupt context. | |
2684 | * | |
2685 | * Notes: | |
2686 | * This routine assumes no locks are held on entry. | |
eb44820c | 2687 | */ |
1da177e4 LT |
2688 | struct fc_rport * |
2689 | fc_remote_port_add(struct Scsi_Host *shost, int channel, | |
2690 | struct fc_rport_identifiers *ids) | |
2691 | { | |
19a7b4ae | 2692 | struct fc_internal *fci = to_fc_internal(shost->transportt); |
aedf3497 | 2693 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
1da177e4 LT |
2694 | struct fc_rport *rport; |
2695 | unsigned long flags; | |
2696 | int match = 0; | |
2697 | ||
aedf3497 JS |
2698 | /* ensure any stgt delete functions are done */ |
2699 | fc_flush_work(shost); | |
2700 | ||
19a7b4ae JSEC |
2701 | /* |
2702 | * Search the list of "active" rports, for an rport that has been | |
2703 | * deleted, but we've held off the real delete while the target | |
2704 | * is in a "blocked" state. | |
2705 | */ | |
2706 | spin_lock_irqsave(shost->host_lock, flags); | |
2707 | ||
aedf3497 | 2708 | list_for_each_entry(rport, &fc_host->rports, peers) { |
19a7b4ae JSEC |
2709 | |
2710 | if ((rport->port_state == FC_PORTSTATE_BLOCKED) && | |
2711 | (rport->channel == channel)) { | |
2712 | ||
aedf3497 | 2713 | switch (fc_host->tgtid_bind_type) { |
19a7b4ae JSEC |
2714 | case FC_TGTID_BIND_BY_WWPN: |
2715 | case FC_TGTID_BIND_NONE: | |
2716 | if (rport->port_name == ids->port_name) | |
2717 | match = 1; | |
2718 | break; | |
2719 | case FC_TGTID_BIND_BY_WWNN: | |
2720 | if (rport->node_name == ids->node_name) | |
2721 | match = 1; | |
2722 | break; | |
2723 | case FC_TGTID_BIND_BY_ID: | |
2724 | if (rport->port_id == ids->port_id) | |
2725 | match = 1; | |
2726 | break; | |
2727 | } | |
2728 | ||
2729 | if (match) { | |
19a7b4ae JSEC |
2730 | |
2731 | memcpy(&rport->node_name, &ids->node_name, | |
2732 | sizeof(rport->node_name)); | |
2733 | memcpy(&rport->port_name, &ids->port_name, | |
2734 | sizeof(rport->port_name)); | |
2735 | rport->port_id = ids->port_id; | |
2736 | ||
2737 | rport->port_state = FC_PORTSTATE_ONLINE; | |
2738 | rport->roles = ids->roles; | |
2739 | ||
2740 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2741 | ||
2742 | if (fci->f->dd_fcrport_size) | |
2743 | memset(rport->dd_data, 0, | |
2744 | fci->f->dd_fcrport_size); | |
2745 | ||
2746 | /* | |
92740b24 JS |
2747 | * If we were not a target, cancel the |
2748 | * io terminate and rport timers, and | |
2749 | * we're done. | |
2750 | * | |
2751 | * If we were a target, but our new role | |
2752 | * doesn't indicate a target, leave the | |
2753 | * timers running expecting the role to | |
2754 | * change as the target fully logs in. If | |
2755 | * it doesn't, the target will be torn down. | |
2756 | * | |
2757 | * If we were a target, and our role shows | |
2758 | * we're still a target, cancel the timers | |
2759 | * and kick off a scan. | |
19a7b4ae | 2760 | */ |
19a7b4ae | 2761 | |
92740b24 JS |
2762 | /* was a target, not in roles */ |
2763 | if ((rport->scsi_target_id != -1) && | |
a53eb5e0 | 2764 | (!(ids->roles & FC_PORT_ROLE_FCP_TARGET))) |
92740b24 | 2765 | return rport; |
19a7b4ae JSEC |
2766 | |
2767 | /* | |
92740b24 JS |
2768 | * Stop the fail io and dev_loss timers. |
2769 | * If they flush, the port_state will | |
2770 | * be checked and will NOOP the function. | |
19a7b4ae | 2771 | */ |
0f29b966 JS |
2772 | if (!cancel_delayed_work(&rport->fail_io_work)) |
2773 | fc_flush_devloss(shost); | |
92740b24 | 2774 | if (!cancel_delayed_work(&rport->dev_loss_work)) |
aedf3497 JS |
2775 | fc_flush_devloss(shost); |
2776 | ||
2777 | spin_lock_irqsave(shost->host_lock, flags); | |
2778 | ||
fff9d40c | 2779 | rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT | |
4be98c0c JS |
2780 | FC_RPORT_DEVLOSS_PENDING | |
2781 | FC_RPORT_DEVLOSS_CALLBK_DONE); | |
19a7b4ae | 2782 | |
92740b24 JS |
2783 | /* if target, initiate a scan */ |
2784 | if (rport->scsi_target_id != -1) { | |
2785 | rport->flags |= FC_RPORT_SCAN_PENDING; | |
2786 | scsi_queue_work(shost, | |
2787 | &rport->scan_work); | |
2788 | spin_unlock_irqrestore(shost->host_lock, | |
2789 | flags); | |
2790 | scsi_target_unblock(&rport->dev); | |
2791 | } else | |
2792 | spin_unlock_irqrestore(shost->host_lock, | |
2793 | flags); | |
a0785edf | 2794 | |
9e4f5e29 JS |
2795 | fc_bsg_goose_queue(rport); |
2796 | ||
19a7b4ae JSEC |
2797 | return rport; |
2798 | } | |
2799 | } | |
2800 | } | |
2801 | ||
92740b24 JS |
2802 | /* |
2803 | * Search the bindings array | |
2804 | * Note: if never a FCP target, you won't be on this list | |
2805 | */ | |
aedf3497 | 2806 | if (fc_host->tgtid_bind_type != FC_TGTID_BIND_NONE) { |
1da177e4 LT |
2807 | |
2808 | /* search for a matching consistent binding */ | |
2809 | ||
aedf3497 | 2810 | list_for_each_entry(rport, &fc_host->rport_bindings, |
1da177e4 LT |
2811 | peers) { |
2812 | if (rport->channel != channel) | |
2813 | continue; | |
2814 | ||
aedf3497 | 2815 | switch (fc_host->tgtid_bind_type) { |
1da177e4 LT |
2816 | case FC_TGTID_BIND_BY_WWPN: |
2817 | if (rport->port_name == ids->port_name) | |
2818 | match = 1; | |
2819 | break; | |
2820 | case FC_TGTID_BIND_BY_WWNN: | |
2821 | if (rport->node_name == ids->node_name) | |
2822 | match = 1; | |
2823 | break; | |
2824 | case FC_TGTID_BIND_BY_ID: | |
2825 | if (rport->port_id == ids->port_id) | |
2826 | match = 1; | |
2827 | break; | |
2828 | case FC_TGTID_BIND_NONE: /* to keep compiler happy */ | |
2829 | break; | |
2830 | } | |
2831 | ||
2832 | if (match) { | |
aedf3497 | 2833 | list_move_tail(&rport->peers, &fc_host->rports); |
1da177e4 LT |
2834 | break; |
2835 | } | |
2836 | } | |
2837 | ||
1da177e4 LT |
2838 | if (match) { |
2839 | memcpy(&rport->node_name, &ids->node_name, | |
2840 | sizeof(rport->node_name)); | |
2841 | memcpy(&rport->port_name, &ids->port_name, | |
2842 | sizeof(rport->port_name)); | |
2843 | rport->port_id = ids->port_id; | |
2844 | rport->roles = ids->roles; | |
2845 | rport->port_state = FC_PORTSTATE_ONLINE; | |
fff9d40c | 2846 | rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT; |
1da177e4 | 2847 | |
19a7b4ae JSEC |
2848 | if (fci->f->dd_fcrport_size) |
2849 | memset(rport->dd_data, 0, | |
2850 | fci->f->dd_fcrport_size); | |
2851 | ||
a53eb5e0 | 2852 | if (rport->roles & FC_PORT_ROLE_FCP_TARGET) { |
1da177e4 | 2853 | /* initiate a scan of the target */ |
aedf3497 | 2854 | rport->flags |= FC_RPORT_SCAN_PENDING; |
1da177e4 | 2855 | scsi_queue_work(shost, &rport->scan_work); |
a0785edf JS |
2856 | spin_unlock_irqrestore(shost->host_lock, flags); |
2857 | scsi_target_unblock(&rport->dev); | |
2858 | } else | |
2859 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1da177e4 LT |
2860 | |
2861 | return rport; | |
2862 | } | |
2863 | } | |
2864 | ||
19a7b4ae JSEC |
2865 | spin_unlock_irqrestore(shost->host_lock, flags); |
2866 | ||
1da177e4 LT |
2867 | /* No consistent binding found - create new remote port entry */ |
2868 | rport = fc_rport_create(shost, channel, ids); | |
2869 | ||
2870 | return rport; | |
2871 | } | |
2872 | EXPORT_SYMBOL(fc_remote_port_add); | |
2873 | ||
1da177e4 LT |
2874 | |
2875 | /** | |
eb44820c | 2876 | * fc_remote_port_delete - notifies the fc transport that a remote port is no longer in existence. |
1da177e4 LT |
2877 | * @rport: The remote port that no longer exists |
2878 | * | |
2879 | * The LLDD calls this routine to notify the transport that a remote | |
2880 | * port is no longer part of the topology. Note: Although a port | |
2881 | * may no longer be part of the topology, it may persist in the remote | |
19a7b4ae | 2882 | * ports displayed by the fc_host. We do this under 2 conditions: |
eb44820c | 2883 | * 1) If the port was a scsi target, we delay its deletion by "blocking" it. |
19a7b4ae JSEC |
2884 | * This allows the port to temporarily disappear, then reappear without |
2885 | * disrupting the SCSI device tree attached to it. During the "blocked" | |
2886 | * period the port will still exist. | |
eb44820c | 2887 | * 2) If the port was a scsi target and disappears for longer than we |
19a7b4ae JSEC |
2888 | * expect, we'll delete the port and the tear down the SCSI device tree |
2889 | * attached to it. However, we want to semi-persist the target id assigned | |
2890 | * to that port if it eventually does exist. The port structure will | |
2891 | * remain (although with minimal information) so that the target id | |
2892 | * bindings remails. | |
1da177e4 LT |
2893 | * |
2894 | * If the remote port is not an FCP Target, it will be fully torn down | |
2895 | * and deallocated, including the fc_remote_port class device. | |
2896 | * | |
19a7b4ae JSEC |
2897 | * If the remote port is an FCP Target, the port will be placed in a |
2898 | * temporary blocked state. From the LLDD's perspective, the rport no | |
2899 | * longer exists. From the SCSI midlayer's perspective, the SCSI target | |
2900 | * exists, but all sdevs on it are blocked from further I/O. The following | |
eb44820c RL |
2901 | * is then expected. |
2902 | * | |
19a7b4ae JSEC |
2903 | * If the remote port does not return (signaled by a LLDD call to |
2904 | * fc_remote_port_add()) within the dev_loss_tmo timeout, then the | |
2905 | * scsi target is removed - killing all outstanding i/o and removing the | |
2906 | * scsi devices attached ot it. The port structure will be marked Not | |
2907 | * Present and be partially cleared, leaving only enough information to | |
2908 | * recognize the remote port relative to the scsi target id binding if | |
2909 | * it later appears. The port will remain as long as there is a valid | |
2910 | * binding (e.g. until the user changes the binding type or unloads the | |
2911 | * scsi host with the binding). | |
1da177e4 | 2912 | * |
19a7b4ae JSEC |
2913 | * If the remote port returns within the dev_loss_tmo value (and matches |
2914 | * according to the target id binding type), the port structure will be | |
2915 | * reused. If it is no longer a SCSI target, the target will be torn | |
2916 | * down. If it continues to be a SCSI target, then the target will be | |
2917 | * unblocked (allowing i/o to be resumed), and a scan will be activated | |
2918 | * to ensure that all luns are detected. | |
2919 | * | |
2920 | * Called from normal process context only - cannot be called from interrupt. | |
1da177e4 LT |
2921 | * |
2922 | * Notes: | |
2923 | * This routine assumes no locks are held on entry. | |
eb44820c | 2924 | */ |
1da177e4 LT |
2925 | void |
2926 | fc_remote_port_delete(struct fc_rport *rport) | |
2927 | { | |
aedf3497 | 2928 | struct Scsi_Host *shost = rport_to_shost(rport); |
36dd288f | 2929 | unsigned long timeout = rport->dev_loss_tmo; |
aedf3497 JS |
2930 | unsigned long flags; |
2931 | ||
2932 | /* | |
2933 | * No need to flush the fc_host work_q's, as all adds are synchronous. | |
2934 | * | |
2935 | * We do need to reclaim the rport scan work element, so eventually | |
2936 | * (in fc_rport_final_delete()) we'll flush the scsi host work_q if | |
2937 | * there's still a scan pending. | |
2938 | */ | |
2939 | ||
2940 | spin_lock_irqsave(shost->host_lock, flags); | |
1da177e4 | 2941 | |
92740b24 | 2942 | if (rport->port_state != FC_PORTSTATE_ONLINE) { |
aedf3497 | 2943 | spin_unlock_irqrestore(shost->host_lock, flags); |
1da177e4 LT |
2944 | return; |
2945 | } | |
2946 | ||
92740b24 JS |
2947 | /* |
2948 | * In the past, we if this was not an FCP-Target, we would | |
2949 | * unconditionally just jump to deleting the rport. | |
2950 | * However, rports can be used as node containers by the LLDD, | |
2951 | * and its not appropriate to just terminate the rport at the | |
2952 | * first sign of a loss in connectivity. The LLDD may want to | |
2953 | * send ELS traffic to re-validate the login. If the rport is | |
2954 | * immediately deleted, it makes it inappropriate for a node | |
2955 | * container. | |
2956 | * So... we now unconditionally wait dev_loss_tmo before | |
2957 | * destroying an rport. | |
2958 | */ | |
2959 | ||
aedf3497 JS |
2960 | rport->port_state = FC_PORTSTATE_BLOCKED; |
2961 | ||
2962 | rport->flags |= FC_RPORT_DEVLOSS_PENDING; | |
2963 | ||
2964 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2965 | ||
7525236d FT |
2966 | if (rport->roles & FC_PORT_ROLE_FCP_INITIATOR && |
2967 | shost->active_mode & MODE_TARGET) | |
2968 | fc_tgt_it_nexus_destroy(shost, (unsigned long)rport); | |
2969 | ||
19a7b4ae | 2970 | scsi_target_block(&rport->dev); |
1da177e4 | 2971 | |
0f29b966 JS |
2972 | /* see if we need to kill io faster than waiting for device loss */ |
2973 | if ((rport->fast_io_fail_tmo != -1) && | |
fff9d40c | 2974 | (rport->fast_io_fail_tmo < timeout)) |
0f29b966 JS |
2975 | fc_queue_devloss_work(shost, &rport->fail_io_work, |
2976 | rport->fast_io_fail_tmo * HZ); | |
2977 | ||
19a7b4ae | 2978 | /* cap the length the devices can be blocked until they are deleted */ |
aedf3497 | 2979 | fc_queue_devloss_work(shost, &rport->dev_loss_work, timeout * HZ); |
1da177e4 LT |
2980 | } |
2981 | EXPORT_SYMBOL(fc_remote_port_delete); | |
2982 | ||
2983 | /** | |
eb44820c | 2984 | * fc_remote_port_rolechg - notifies the fc transport that the roles on a remote may have changed. |
1da177e4 | 2985 | * @rport: The remote port that changed. |
eb44820c | 2986 | * @roles: New roles for this port. |
1da177e4 | 2987 | * |
eb44820c RL |
2988 | * Description: The LLDD calls this routine to notify the transport that the |
2989 | * roles on a remote port may have changed. The largest effect of this is | |
1da177e4 LT |
2990 | * if a port now becomes a FCP Target, it must be allocated a |
2991 | * scsi target id. If the port is no longer a FCP target, any | |
2992 | * scsi target id value assigned to it will persist in case the | |
2993 | * role changes back to include FCP Target. No changes in the scsi | |
2994 | * midlayer will be invoked if the role changes (in the expectation | |
2995 | * that the role will be resumed. If it doesn't normal error processing | |
2996 | * will take place). | |
2997 | * | |
2998 | * Should not be called from interrupt context. | |
2999 | * | |
3000 | * Notes: | |
3001 | * This routine assumes no locks are held on entry. | |
eb44820c | 3002 | */ |
1da177e4 LT |
3003 | void |
3004 | fc_remote_port_rolechg(struct fc_rport *rport, u32 roles) | |
3005 | { | |
3006 | struct Scsi_Host *shost = rport_to_shost(rport); | |
aedf3497 | 3007 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
1da177e4 LT |
3008 | unsigned long flags; |
3009 | int create = 0; | |
7525236d | 3010 | int ret; |
1da177e4 | 3011 | |
1da177e4 | 3012 | spin_lock_irqsave(shost->host_lock, flags); |
a53eb5e0 | 3013 | if (roles & FC_PORT_ROLE_FCP_TARGET) { |
19a7b4ae JSEC |
3014 | if (rport->scsi_target_id == -1) { |
3015 | rport->scsi_target_id = fc_host->next_target_id++; | |
3016 | create = 1; | |
a53eb5e0 | 3017 | } else if (!(rport->roles & FC_PORT_ROLE_FCP_TARGET)) |
19a7b4ae | 3018 | create = 1; |
7525236d FT |
3019 | } else if (shost->active_mode & MODE_TARGET) { |
3020 | ret = fc_tgt_it_nexus_create(shost, (unsigned long)rport, | |
3021 | (char *)&rport->node_name); | |
3022 | if (ret) | |
3023 | printk(KERN_ERR "FC Remore Port tgt nexus failed %d\n", | |
3024 | ret); | |
1da177e4 | 3025 | } |
1da177e4 | 3026 | |
19a7b4ae JSEC |
3027 | rport->roles = roles; |
3028 | ||
aedf3497 JS |
3029 | spin_unlock_irqrestore(shost->host_lock, flags); |
3030 | ||
19a7b4ae JSEC |
3031 | if (create) { |
3032 | /* | |
3033 | * There may have been a delete timer running on the | |
3034 | * port. Ensure that it is cancelled as we now know | |
3035 | * the port is an FCP Target. | |
3036 | * Note: we know the rport is exists and in an online | |
3037 | * state as the LLDD would not have had an rport | |
3038 | * reference to pass us. | |
3039 | * | |
3040 | * Take no action on the del_timer failure as the state | |
3041 | * machine state change will validate the | |
3042 | * transaction. | |
3043 | */ | |
0f29b966 JS |
3044 | if (!cancel_delayed_work(&rport->fail_io_work)) |
3045 | fc_flush_devloss(shost); | |
19a7b4ae | 3046 | if (!cancel_delayed_work(&rport->dev_loss_work)) |
aedf3497 JS |
3047 | fc_flush_devloss(shost); |
3048 | ||
3049 | spin_lock_irqsave(shost->host_lock, flags); | |
fff9d40c | 3050 | rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT | |
0eecee41 JS |
3051 | FC_RPORT_DEVLOSS_PENDING | |
3052 | FC_RPORT_DEVLOSS_CALLBK_DONE); | |
aedf3497 JS |
3053 | spin_unlock_irqrestore(shost->host_lock, flags); |
3054 | ||
3055 | /* ensure any stgt delete functions are done */ | |
3056 | fc_flush_work(shost); | |
19a7b4ae | 3057 | |
1da177e4 | 3058 | /* initiate a scan of the target */ |
aedf3497 JS |
3059 | spin_lock_irqsave(shost->host_lock, flags); |
3060 | rport->flags |= FC_RPORT_SCAN_PENDING; | |
1da177e4 | 3061 | scsi_queue_work(shost, &rport->scan_work); |
aedf3497 | 3062 | spin_unlock_irqrestore(shost->host_lock, flags); |
a0785edf | 3063 | scsi_target_unblock(&rport->dev); |
19a7b4ae | 3064 | } |
1da177e4 LT |
3065 | } |
3066 | EXPORT_SYMBOL(fc_remote_port_rolechg); | |
3067 | ||
3068 | /** | |
eb44820c | 3069 | * fc_timeout_deleted_rport - Timeout handler for a deleted remote port. |
92740b24 | 3070 | * @work: rport target that failed to reappear in the allotted time. |
eb44820c RL |
3071 | * |
3072 | * Description: An attempt to delete a remote port blocks, and if it fails | |
3073 | * to return in the allotted time this gets called. | |
3074 | */ | |
1da177e4 | 3075 | static void |
c4028958 | 3076 | fc_timeout_deleted_rport(struct work_struct *work) |
1da177e4 | 3077 | { |
c4028958 DH |
3078 | struct fc_rport *rport = |
3079 | container_of(work, struct fc_rport, dev_loss_work.work); | |
19a7b4ae | 3080 | struct Scsi_Host *shost = rport_to_shost(rport); |
4be98c0c | 3081 | struct fc_internal *i = to_fc_internal(shost->transportt); |
aedf3497 | 3082 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
19a7b4ae | 3083 | unsigned long flags; |
8798a694 | 3084 | int do_callback = 0; |
1da177e4 | 3085 | |
19a7b4ae | 3086 | spin_lock_irqsave(shost->host_lock, flags); |
1da177e4 | 3087 | |
aedf3497 JS |
3088 | rport->flags &= ~FC_RPORT_DEVLOSS_PENDING; |
3089 | ||
1da177e4 | 3090 | /* |
92740b24 JS |
3091 | * If the port is ONLINE, then it came back. If it was a SCSI |
3092 | * target, validate it still is. If not, tear down the | |
3093 | * scsi_target on it. | |
1da177e4 | 3094 | */ |
aedf3497 | 3095 | if ((rport->port_state == FC_PORTSTATE_ONLINE) && |
92740b24 | 3096 | (rport->scsi_target_id != -1) && |
a53eb5e0 | 3097 | !(rport->roles & FC_PORT_ROLE_FCP_TARGET)) { |
19a7b4ae | 3098 | dev_printk(KERN_ERR, &rport->dev, |
aedf3497 JS |
3099 | "blocked FC remote port time out: no longer" |
3100 | " a FCP target, removing starget\n"); | |
aedf3497 | 3101 | spin_unlock_irqrestore(shost->host_lock, flags); |
a0785edf JS |
3102 | scsi_target_unblock(&rport->dev); |
3103 | fc_queue_work(shost, &rport->stgt_delete_work); | |
19a7b4ae JSEC |
3104 | return; |
3105 | } | |
1da177e4 | 3106 | |
92740b24 | 3107 | /* NOOP state - we're flushing workq's */ |
19a7b4ae JSEC |
3108 | if (rport->port_state != FC_PORTSTATE_BLOCKED) { |
3109 | spin_unlock_irqrestore(shost->host_lock, flags); | |
3110 | dev_printk(KERN_ERR, &rport->dev, | |
92740b24 JS |
3111 | "blocked FC remote port time out: leaving" |
3112 | " rport%s alone\n", | |
3113 | (rport->scsi_target_id != -1) ? " and starget" : ""); | |
19a7b4ae JSEC |
3114 | return; |
3115 | } | |
1da177e4 | 3116 | |
92740b24 JS |
3117 | if ((fc_host->tgtid_bind_type == FC_TGTID_BIND_NONE) || |
3118 | (rport->scsi_target_id == -1)) { | |
aedf3497 JS |
3119 | list_del(&rport->peers); |
3120 | rport->port_state = FC_PORTSTATE_DELETED; | |
19a7b4ae | 3121 | dev_printk(KERN_ERR, &rport->dev, |
92740b24 JS |
3122 | "blocked FC remote port time out: removing" |
3123 | " rport%s\n", | |
3124 | (rport->scsi_target_id != -1) ? " and starget" : ""); | |
aedf3497 JS |
3125 | fc_queue_work(shost, &rport->rport_delete_work); |
3126 | spin_unlock_irqrestore(shost->host_lock, flags); | |
19a7b4ae JSEC |
3127 | return; |
3128 | } | |
1da177e4 | 3129 | |
19a7b4ae JSEC |
3130 | dev_printk(KERN_ERR, &rport->dev, |
3131 | "blocked FC remote port time out: removing target and " | |
3132 | "saving binding\n"); | |
3133 | ||
aedf3497 | 3134 | list_move_tail(&rport->peers, &fc_host->rport_bindings); |
1da177e4 LT |
3135 | |
3136 | /* | |
19a7b4ae JSEC |
3137 | * Note: We do not remove or clear the hostdata area. This allows |
3138 | * host-specific target data to persist along with the | |
3139 | * scsi_target_id. It's up to the host to manage it's hostdata area. | |
1da177e4 | 3140 | */ |
1da177e4 | 3141 | |
19a7b4ae JSEC |
3142 | /* |
3143 | * Reinitialize port attributes that may change if the port comes back. | |
3144 | */ | |
3145 | rport->maxframe_size = -1; | |
3146 | rport->supported_classes = FC_COS_UNSPECIFIED; | |
a53eb5e0 | 3147 | rport->roles = FC_PORT_ROLE_UNKNOWN; |
aedf3497 | 3148 | rport->port_state = FC_PORTSTATE_NOTPRESENT; |
fff9d40c | 3149 | rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT; |
1da177e4 | 3150 | |
f78badb1 JS |
3151 | /* |
3152 | * Pre-emptively kill I/O rather than waiting for the work queue | |
3153 | * item to teardown the starget. (FCOE libFC folks prefer this | |
3154 | * and to have the rport_port_id still set when it's done). | |
3155 | */ | |
3156 | spin_unlock_irqrestore(shost->host_lock, flags); | |
3157 | fc_terminate_rport_io(rport); | |
3158 | ||
8798a694 MR |
3159 | spin_lock_irqsave(shost->host_lock, flags); |
3160 | ||
3161 | if (rport->port_state == FC_PORTSTATE_NOTPRESENT) { /* still missing */ | |
f78badb1 | 3162 | |
8798a694 MR |
3163 | /* remove the identifiers that aren't used in the consisting binding */ |
3164 | switch (fc_host->tgtid_bind_type) { | |
3165 | case FC_TGTID_BIND_BY_WWPN: | |
3166 | rport->node_name = -1; | |
3167 | rport->port_id = -1; | |
3168 | break; | |
3169 | case FC_TGTID_BIND_BY_WWNN: | |
3170 | rport->port_name = -1; | |
3171 | rport->port_id = -1; | |
3172 | break; | |
3173 | case FC_TGTID_BIND_BY_ID: | |
3174 | rport->node_name = -1; | |
3175 | rport->port_name = -1; | |
3176 | break; | |
3177 | case FC_TGTID_BIND_NONE: /* to keep compiler happy */ | |
3178 | break; | |
3179 | } | |
3180 | ||
3181 | /* | |
3182 | * As this only occurs if the remote port (scsi target) | |
3183 | * went away and didn't come back - we'll remove | |
3184 | * all attached scsi devices. | |
3185 | */ | |
3186 | rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE; | |
3187 | fc_queue_work(shost, &rport->stgt_delete_work); | |
3188 | ||
3189 | do_callback = 1; | |
19a7b4ae JSEC |
3190 | } |
3191 | ||
8798a694 | 3192 | spin_unlock_irqrestore(shost->host_lock, flags); |
4be98c0c JS |
3193 | |
3194 | /* | |
3195 | * Notify the driver that the rport is now dead. The LLDD will | |
3196 | * also guarantee that any communication to the rport is terminated | |
3197 | * | |
3198 | * Note: we set the CALLBK_DONE flag above to correspond | |
3199 | */ | |
8798a694 | 3200 | if (do_callback && i->f->dev_loss_tmo_callbk) |
4be98c0c | 3201 | i->f->dev_loss_tmo_callbk(rport); |
1da177e4 | 3202 | } |
1da177e4 | 3203 | |
4be98c0c | 3204 | |
0f29b966 | 3205 | /** |
eb44820c | 3206 | * fc_timeout_fail_rport_io - Timeout handler for a fast io failing on a disconnected SCSI target. |
c4028958 | 3207 | * @work: rport to terminate io on. |
0f29b966 JS |
3208 | * |
3209 | * Notes: Only requests the failure of the io, not that all are flushed | |
3210 | * prior to returning. | |
eb44820c | 3211 | */ |
0f29b966 | 3212 | static void |
c4028958 | 3213 | fc_timeout_fail_rport_io(struct work_struct *work) |
0f29b966 | 3214 | { |
c4028958 DH |
3215 | struct fc_rport *rport = |
3216 | container_of(work, struct fc_rport, fail_io_work.work); | |
0f29b966 JS |
3217 | |
3218 | if (rport->port_state != FC_PORTSTATE_BLOCKED) | |
3219 | return; | |
3220 | ||
fff9d40c MC |
3221 | rport->flags |= FC_RPORT_FAST_FAIL_TIMEDOUT; |
3222 | fc_terminate_rport_io(rport); | |
0f29b966 JS |
3223 | } |
3224 | ||
1da177e4 LT |
3225 | /** |
3226 | * fc_scsi_scan_rport - called to perform a scsi scan on a remote port. | |
c4028958 | 3227 | * @work: remote port to be scanned. |
eb44820c | 3228 | */ |
1da177e4 | 3229 | static void |
c4028958 | 3230 | fc_scsi_scan_rport(struct work_struct *work) |
1da177e4 | 3231 | { |
c4028958 DH |
3232 | struct fc_rport *rport = |
3233 | container_of(work, struct fc_rport, scan_work); | |
aedf3497 | 3234 | struct Scsi_Host *shost = rport_to_shost(rport); |
03f002f7 | 3235 | struct fc_internal *i = to_fc_internal(shost->transportt); |
42e33148 JSEC |
3236 | unsigned long flags; |
3237 | ||
aedf3497 | 3238 | if ((rport->port_state == FC_PORTSTATE_ONLINE) && |
03f002f7 CS |
3239 | (rport->roles & FC_PORT_ROLE_FCP_TARGET) && |
3240 | !(i->f->disable_target_scan)) { | |
aedf3497 JS |
3241 | scsi_scan_target(&rport->dev, rport->channel, |
3242 | rport->scsi_target_id, SCAN_WILD_CARD, 1); | |
42e33148 | 3243 | } |
aedf3497 JS |
3244 | |
3245 | spin_lock_irqsave(shost->host_lock, flags); | |
3246 | rport->flags &= ~FC_RPORT_SCAN_PENDING; | |
42e33148 JSEC |
3247 | spin_unlock_irqrestore(shost->host_lock, flags); |
3248 | } | |
3249 | ||
65d430fa CS |
3250 | /** |
3251 | * fc_block_scsi_eh - Block SCSI eh thread for blocked fc_rport | |
3252 | * @cmnd: SCSI command that scsi_eh is trying to recover | |
3253 | * | |
3254 | * This routine can be called from a FC LLD scsi_eh callback. It | |
3255 | * blocks the scsi_eh thread until the fc_rport leaves the | |
2f2eb587 CS |
3256 | * FC_PORTSTATE_BLOCKED, or the fast_io_fail_tmo fires. This is |
3257 | * necessary to avoid the scsi_eh failing recovery actions for blocked | |
3258 | * rports which would lead to offlined SCSI devices. | |
3259 | * | |
3260 | * Returns: 0 if the fc_rport left the state FC_PORTSTATE_BLOCKED. | |
3261 | * FAST_IO_FAIL if the fast_io_fail_tmo fired, this should be | |
3262 | * passed back to scsi_eh. | |
65d430fa | 3263 | */ |
2f2eb587 | 3264 | int fc_block_scsi_eh(struct scsi_cmnd *cmnd) |
65d430fa CS |
3265 | { |
3266 | struct Scsi_Host *shost = cmnd->device->host; | |
3267 | struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); | |
3268 | unsigned long flags; | |
3269 | ||
3270 | spin_lock_irqsave(shost->host_lock, flags); | |
2f2eb587 CS |
3271 | while (rport->port_state == FC_PORTSTATE_BLOCKED && |
3272 | !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)) { | |
65d430fa CS |
3273 | spin_unlock_irqrestore(shost->host_lock, flags); |
3274 | msleep(1000); | |
3275 | spin_lock_irqsave(shost->host_lock, flags); | |
3276 | } | |
3277 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2f2eb587 CS |
3278 | |
3279 | if (rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT) | |
3280 | return FAST_IO_FAIL; | |
3281 | ||
3282 | return 0; | |
65d430fa CS |
3283 | } |
3284 | EXPORT_SYMBOL(fc_block_scsi_eh); | |
42e33148 | 3285 | |
a53eb5e0 | 3286 | /** |
a30c3f69 | 3287 | * fc_vport_setup - allocates and creates a FC virtual port. |
a53eb5e0 JS |
3288 | * @shost: scsi host the virtual port is connected to. |
3289 | * @channel: Channel on shost port connected to. | |
3290 | * @pdev: parent device for vport | |
3291 | * @ids: The world wide names, FC4 port roles, etc for | |
3292 | * the virtual port. | |
3293 | * @ret_vport: The pointer to the created vport. | |
3294 | * | |
3295 | * Allocates and creates the vport structure, calls the parent host | |
3296 | * to instantiate the vport, the completes w/ class and sysfs creation. | |
3297 | * | |
3298 | * Notes: | |
3299 | * This routine assumes no locks are held on entry. | |
eb44820c | 3300 | */ |
a53eb5e0 | 3301 | static int |
a30c3f69 | 3302 | fc_vport_setup(struct Scsi_Host *shost, int channel, struct device *pdev, |
a53eb5e0 JS |
3303 | struct fc_vport_identifiers *ids, struct fc_vport **ret_vport) |
3304 | { | |
3305 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); | |
3306 | struct fc_internal *fci = to_fc_internal(shost->transportt); | |
3307 | struct fc_vport *vport; | |
3308 | struct device *dev; | |
3309 | unsigned long flags; | |
3310 | size_t size; | |
3311 | int error; | |
3312 | ||
3313 | *ret_vport = NULL; | |
3314 | ||
3315 | if ( ! fci->f->vport_create) | |
3316 | return -ENOENT; | |
3317 | ||
3318 | size = (sizeof(struct fc_vport) + fci->f->dd_fcvport_size); | |
3319 | vport = kzalloc(size, GFP_KERNEL); | |
3320 | if (unlikely(!vport)) { | |
cadbd4a5 | 3321 | printk(KERN_ERR "%s: allocation failure\n", __func__); |
a53eb5e0 JS |
3322 | return -ENOMEM; |
3323 | } | |
3324 | ||
3325 | vport->vport_state = FC_VPORT_UNKNOWN; | |
3326 | vport->vport_last_state = FC_VPORT_UNKNOWN; | |
3327 | vport->node_name = ids->node_name; | |
3328 | vport->port_name = ids->port_name; | |
3329 | vport->roles = ids->roles; | |
3330 | vport->vport_type = ids->vport_type; | |
3331 | if (fci->f->dd_fcvport_size) | |
3332 | vport->dd_data = &vport[1]; | |
3333 | vport->shost = shost; | |
3334 | vport->channel = channel; | |
3335 | vport->flags = FC_VPORT_CREATING; | |
9ef3e4a4 | 3336 | INIT_WORK(&vport->vport_delete_work, fc_vport_sched_delete); |
a53eb5e0 JS |
3337 | |
3338 | spin_lock_irqsave(shost->host_lock, flags); | |
3339 | ||
3340 | if (fc_host->npiv_vports_inuse >= fc_host->max_npiv_vports) { | |
3341 | spin_unlock_irqrestore(shost->host_lock, flags); | |
3342 | kfree(vport); | |
3343 | return -ENOSPC; | |
3344 | } | |
3345 | fc_host->npiv_vports_inuse++; | |
3346 | vport->number = fc_host->next_vport_number++; | |
3347 | list_add_tail(&vport->peers, &fc_host->vports); | |
3348 | get_device(&shost->shost_gendev); /* for fc_host->vport list */ | |
3349 | ||
3350 | spin_unlock_irqrestore(shost->host_lock, flags); | |
3351 | ||
3352 | dev = &vport->dev; | |
3353 | device_initialize(dev); /* takes self reference */ | |
3354 | dev->parent = get_device(pdev); /* takes parent reference */ | |
3355 | dev->release = fc_vport_dev_release; | |
71610f55 KS |
3356 | dev_set_name(dev, "vport-%d:%d-%d", |
3357 | shost->host_no, channel, vport->number); | |
a53eb5e0 JS |
3358 | transport_setup_device(dev); |
3359 | ||
3360 | error = device_add(dev); | |
3361 | if (error) { | |
3362 | printk(KERN_ERR "FC Virtual Port device_add failed\n"); | |
3363 | goto delete_vport; | |
3364 | } | |
3365 | transport_add_device(dev); | |
3366 | transport_configure_device(dev); | |
3367 | ||
3368 | error = fci->f->vport_create(vport, ids->disable); | |
3369 | if (error) { | |
3370 | printk(KERN_ERR "FC Virtual Port LLDD Create failed\n"); | |
3371 | goto delete_vport_all; | |
3372 | } | |
3373 | ||
3374 | /* | |
3375 | * if the parent isn't the physical adapter's Scsi_Host, ensure | |
3376 | * the Scsi_Host at least contains ia symlink to the vport. | |
3377 | */ | |
3378 | if (pdev != &shost->shost_gendev) { | |
3379 | error = sysfs_create_link(&shost->shost_gendev.kobj, | |
71610f55 | 3380 | &dev->kobj, dev_name(dev)); |
a53eb5e0 JS |
3381 | if (error) |
3382 | printk(KERN_ERR | |
3383 | "%s: Cannot create vport symlinks for " | |
3384 | "%s, err=%d\n", | |
71610f55 | 3385 | __func__, dev_name(dev), error); |
a53eb5e0 JS |
3386 | } |
3387 | spin_lock_irqsave(shost->host_lock, flags); | |
3388 | vport->flags &= ~FC_VPORT_CREATING; | |
3389 | spin_unlock_irqrestore(shost->host_lock, flags); | |
3390 | ||
3391 | dev_printk(KERN_NOTICE, pdev, | |
71610f55 | 3392 | "%s created via shost%d channel %d\n", dev_name(dev), |
a53eb5e0 JS |
3393 | shost->host_no, channel); |
3394 | ||
3395 | *ret_vport = vport; | |
3396 | ||
3397 | return 0; | |
3398 | ||
3399 | delete_vport_all: | |
3400 | transport_remove_device(dev); | |
3401 | device_del(dev); | |
3402 | delete_vport: | |
3403 | transport_destroy_device(dev); | |
3404 | spin_lock_irqsave(shost->host_lock, flags); | |
3405 | list_del(&vport->peers); | |
3406 | put_device(&shost->shost_gendev); /* for fc_host->vport list */ | |
3407 | fc_host->npiv_vports_inuse--; | |
3408 | spin_unlock_irqrestore(shost->host_lock, flags); | |
3409 | put_device(dev->parent); | |
3410 | kfree(vport); | |
3411 | ||
3412 | return error; | |
3413 | } | |
3414 | ||
a30c3f69 AV |
3415 | /** |
3416 | * fc_vport_create - Admin App or LLDD requests creation of a vport | |
3417 | * @shost: scsi host the virtual port is connected to. | |
3418 | * @channel: channel on shost port connected to. | |
3419 | * @ids: The world wide names, FC4 port roles, etc for | |
3420 | * the virtual port. | |
3421 | * | |
3422 | * Notes: | |
3423 | * This routine assumes no locks are held on entry. | |
3424 | */ | |
3425 | struct fc_vport * | |
3426 | fc_vport_create(struct Scsi_Host *shost, int channel, | |
3427 | struct fc_vport_identifiers *ids) | |
3428 | { | |
3429 | int stat; | |
3430 | struct fc_vport *vport; | |
3431 | ||
3432 | stat = fc_vport_setup(shost, channel, &shost->shost_gendev, | |
3433 | ids, &vport); | |
3434 | return stat ? NULL : vport; | |
3435 | } | |
3436 | EXPORT_SYMBOL(fc_vport_create); | |
a53eb5e0 JS |
3437 | |
3438 | /** | |
3439 | * fc_vport_terminate - Admin App or LLDD requests termination of a vport | |
3440 | * @vport: fc_vport to be terminated | |
3441 | * | |
3442 | * Calls the LLDD vport_delete() function, then deallocates and removes | |
3443 | * the vport from the shost and object tree. | |
3444 | * | |
3445 | * Notes: | |
3446 | * This routine assumes no locks are held on entry. | |
eb44820c | 3447 | */ |
a53eb5e0 JS |
3448 | int |
3449 | fc_vport_terminate(struct fc_vport *vport) | |
3450 | { | |
3451 | struct Scsi_Host *shost = vport_to_shost(vport); | |
3452 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); | |
3453 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
3454 | struct device *dev = &vport->dev; | |
3455 | unsigned long flags; | |
3456 | int stat; | |
3457 | ||
a53eb5e0 JS |
3458 | if (i->f->vport_delete) |
3459 | stat = i->f->vport_delete(vport); | |
3460 | else | |
3461 | stat = -ENOENT; | |
3462 | ||
3463 | spin_lock_irqsave(shost->host_lock, flags); | |
3464 | vport->flags &= ~FC_VPORT_DELETING; | |
3465 | if (!stat) { | |
3466 | vport->flags |= FC_VPORT_DELETED; | |
3467 | list_del(&vport->peers); | |
3468 | fc_host->npiv_vports_inuse--; | |
3469 | put_device(&shost->shost_gendev); /* for fc_host->vport list */ | |
3470 | } | |
3471 | spin_unlock_irqrestore(shost->host_lock, flags); | |
3472 | ||
3473 | if (stat) | |
3474 | return stat; | |
3475 | ||
3476 | if (dev->parent != &shost->shost_gendev) | |
71610f55 | 3477 | sysfs_remove_link(&shost->shost_gendev.kobj, dev_name(dev)); |
a53eb5e0 JS |
3478 | transport_remove_device(dev); |
3479 | device_del(dev); | |
3480 | transport_destroy_device(dev); | |
3481 | ||
3482 | /* | |
3483 | * Removing our self-reference should mean our | |
3484 | * release function gets called, which will drop the remaining | |
3485 | * parent reference and free the data structure. | |
3486 | */ | |
3487 | put_device(dev); /* for self-reference */ | |
3488 | ||
3489 | return 0; /* SUCCESS */ | |
3490 | } | |
3491 | EXPORT_SYMBOL(fc_vport_terminate); | |
3492 | ||
9ef3e4a4 JS |
3493 | /** |
3494 | * fc_vport_sched_delete - workq-based delete request for a vport | |
9ef3e4a4 | 3495 | * @work: vport to be deleted. |
eb44820c | 3496 | */ |
9ef3e4a4 JS |
3497 | static void |
3498 | fc_vport_sched_delete(struct work_struct *work) | |
3499 | { | |
3500 | struct fc_vport *vport = | |
3501 | container_of(work, struct fc_vport, vport_delete_work); | |
3502 | int stat; | |
3503 | ||
3504 | stat = fc_vport_terminate(vport); | |
3505 | if (stat) | |
3506 | dev_printk(KERN_ERR, vport->dev.parent, | |
3507 | "%s: %s could not be deleted created via " | |
cadbd4a5 | 3508 | "shost%d channel %d - error %d\n", __func__, |
71610f55 | 3509 | dev_name(&vport->dev), vport->shost->host_no, |
9ef3e4a4 JS |
3510 | vport->channel, stat); |
3511 | } | |
3512 | ||
a53eb5e0 | 3513 | |
9e4f5e29 JS |
3514 | /* |
3515 | * BSG support | |
3516 | */ | |
3517 | ||
3518 | ||
3519 | /** | |
3520 | * fc_destroy_bsgjob - routine to teardown/delete a fc bsg job | |
3521 | * @job: fc_bsg_job that is to be torn down | |
3522 | */ | |
3523 | static void | |
3524 | fc_destroy_bsgjob(struct fc_bsg_job *job) | |
3525 | { | |
3526 | unsigned long flags; | |
3527 | ||
3528 | spin_lock_irqsave(&job->job_lock, flags); | |
3529 | if (job->ref_cnt) { | |
3530 | spin_unlock_irqrestore(&job->job_lock, flags); | |
3531 | return; | |
3532 | } | |
3533 | spin_unlock_irqrestore(&job->job_lock, flags); | |
3534 | ||
3535 | put_device(job->dev); /* release reference for the request */ | |
3536 | ||
3537 | kfree(job->request_payload.sg_list); | |
3538 | kfree(job->reply_payload.sg_list); | |
3539 | kfree(job); | |
3540 | } | |
3541 | ||
9e4f5e29 JS |
3542 | /** |
3543 | * fc_bsg_jobdone - completion routine for bsg requests that the LLD has | |
3544 | * completed | |
3545 | * @job: fc_bsg_job that is complete | |
3546 | */ | |
3547 | static void | |
3548 | fc_bsg_jobdone(struct fc_bsg_job *job) | |
3549 | { | |
3550 | struct request *req = job->req; | |
3551 | struct request *rsp = req->next_rq; | |
9e4f5e29 JS |
3552 | int err; |
3553 | ||
9e4f5e29 | 3554 | err = job->req->errors = job->reply->result; |
b5c6f776 | 3555 | |
9e4f5e29 JS |
3556 | if (err < 0) |
3557 | /* we're only returning the result field in the reply */ | |
3558 | job->req->sense_len = sizeof(uint32_t); | |
3559 | else | |
3560 | job->req->sense_len = job->reply_len; | |
3561 | ||
3562 | /* we assume all request payload was transferred, residual == 0 */ | |
3563 | req->resid_len = 0; | |
3564 | ||
3565 | if (rsp) { | |
3566 | WARN_ON(job->reply->reply_payload_rcv_len > rsp->resid_len); | |
3567 | ||
3568 | /* set reply (bidi) residual */ | |
3569 | rsp->resid_len -= min(job->reply->reply_payload_rcv_len, | |
3570 | rsp->resid_len); | |
3571 | } | |
b5c6f776 GM |
3572 | blk_complete_request(req); |
3573 | } | |
3574 | ||
3575 | /** | |
3576 | * fc_bsg_softirq_done - softirq done routine for destroying the bsg requests | |
fe5d20c8 | 3577 | * @rq: BSG request that holds the job to be destroyed |
b5c6f776 GM |
3578 | */ |
3579 | static void fc_bsg_softirq_done(struct request *rq) | |
3580 | { | |
3581 | struct fc_bsg_job *job = rq->special; | |
3582 | unsigned long flags; | |
9e4f5e29 | 3583 | |
b5c6f776 GM |
3584 | spin_lock_irqsave(&job->job_lock, flags); |
3585 | job->state_flags |= FC_RQST_STATE_DONE; | |
3586 | job->ref_cnt--; | |
3587 | spin_unlock_irqrestore(&job->job_lock, flags); | |
9e4f5e29 | 3588 | |
b5c6f776 | 3589 | blk_end_request_all(rq, rq->errors); |
9e4f5e29 JS |
3590 | fc_destroy_bsgjob(job); |
3591 | } | |
3592 | ||
9e4f5e29 JS |
3593 | /** |
3594 | * fc_bsg_job_timeout - handler for when a bsg request timesout | |
3595 | * @req: request that timed out | |
3596 | */ | |
3597 | static enum blk_eh_timer_return | |
3598 | fc_bsg_job_timeout(struct request *req) | |
3599 | { | |
3600 | struct fc_bsg_job *job = (void *) req->special; | |
3601 | struct Scsi_Host *shost = job->shost; | |
3602 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
3603 | unsigned long flags; | |
3604 | int err = 0, done = 0; | |
3605 | ||
3606 | if (job->rport && job->rport->port_state == FC_PORTSTATE_BLOCKED) | |
3607 | return BLK_EH_RESET_TIMER; | |
3608 | ||
3609 | spin_lock_irqsave(&job->job_lock, flags); | |
3610 | if (job->state_flags & FC_RQST_STATE_DONE) | |
3611 | done = 1; | |
3612 | else | |
3613 | job->ref_cnt++; | |
3614 | spin_unlock_irqrestore(&job->job_lock, flags); | |
3615 | ||
3616 | if (!done && i->f->bsg_timeout) { | |
3617 | /* call LLDD to abort the i/o as it has timed out */ | |
3618 | err = i->f->bsg_timeout(job); | |
b8f08645 SS |
3619 | if (err == -EAGAIN) { |
3620 | job->ref_cnt--; | |
3621 | return BLK_EH_RESET_TIMER; | |
3622 | } else if (err) | |
9e4f5e29 JS |
3623 | printk(KERN_ERR "ERROR: FC BSG request timeout - LLD " |
3624 | "abort failed with status %d\n", err); | |
3625 | } | |
3626 | ||
9e4f5e29 | 3627 | /* the blk_end_sync_io() doesn't check the error */ |
47e7e89e GM |
3628 | if (done) |
3629 | return BLK_EH_NOT_HANDLED; | |
3630 | else | |
3631 | return BLK_EH_HANDLED; | |
9e4f5e29 JS |
3632 | } |
3633 | ||
9e4f5e29 JS |
3634 | static int |
3635 | fc_bsg_map_buffer(struct fc_bsg_buffer *buf, struct request *req) | |
3636 | { | |
3637 | size_t sz = (sizeof(struct scatterlist) * req->nr_phys_segments); | |
3638 | ||
3639 | BUG_ON(!req->nr_phys_segments); | |
3640 | ||
3641 | buf->sg_list = kzalloc(sz, GFP_KERNEL); | |
3642 | if (!buf->sg_list) | |
3643 | return -ENOMEM; | |
3644 | sg_init_table(buf->sg_list, req->nr_phys_segments); | |
3645 | buf->sg_cnt = blk_rq_map_sg(req->q, req, buf->sg_list); | |
3646 | buf->payload_len = blk_rq_bytes(req); | |
3647 | return 0; | |
3648 | } | |
3649 | ||
3650 | ||
3651 | /** | |
3652 | * fc_req_to_bsgjob - Allocate/create the fc_bsg_job structure for the | |
3653 | * bsg request | |
3654 | * @shost: SCSI Host corresponding to the bsg object | |
3655 | * @rport: (optional) FC Remote Port corresponding to the bsg object | |
3656 | * @req: BSG request that needs a job structure | |
3657 | */ | |
3658 | static int | |
3659 | fc_req_to_bsgjob(struct Scsi_Host *shost, struct fc_rport *rport, | |
3660 | struct request *req) | |
3661 | { | |
3662 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
3663 | struct request *rsp = req->next_rq; | |
3664 | struct fc_bsg_job *job; | |
3665 | int ret; | |
3666 | ||
3667 | BUG_ON(req->special); | |
3668 | ||
3669 | job = kzalloc(sizeof(struct fc_bsg_job) + i->f->dd_bsg_size, | |
3670 | GFP_KERNEL); | |
3671 | if (!job) | |
3672 | return -ENOMEM; | |
3673 | ||
3674 | /* | |
3675 | * Note: this is a bit silly. | |
3676 | * The request gets formatted as a SGIO v4 ioctl request, which | |
3677 | * then gets reformatted as a blk request, which then gets | |
3678 | * reformatted as a fc bsg request. And on completion, we have | |
3679 | * to wrap return results such that SGIO v4 thinks it was a scsi | |
3680 | * status. I hope this was all worth it. | |
3681 | */ | |
3682 | ||
3683 | req->special = job; | |
3684 | job->shost = shost; | |
3685 | job->rport = rport; | |
3686 | job->req = req; | |
3687 | if (i->f->dd_bsg_size) | |
3688 | job->dd_data = (void *)&job[1]; | |
3689 | spin_lock_init(&job->job_lock); | |
3690 | job->request = (struct fc_bsg_request *)req->cmd; | |
3691 | job->request_len = req->cmd_len; | |
3692 | job->reply = req->sense; | |
3693 | job->reply_len = SCSI_SENSE_BUFFERSIZE; /* Size of sense buffer | |
3694 | * allocated */ | |
3695 | if (req->bio) { | |
3696 | ret = fc_bsg_map_buffer(&job->request_payload, req); | |
3697 | if (ret) | |
3698 | goto failjob_rls_job; | |
3699 | } | |
3700 | if (rsp && rsp->bio) { | |
3701 | ret = fc_bsg_map_buffer(&job->reply_payload, rsp); | |
3702 | if (ret) | |
3703 | goto failjob_rls_rqst_payload; | |
3704 | } | |
3705 | job->job_done = fc_bsg_jobdone; | |
3706 | if (rport) | |
3707 | job->dev = &rport->dev; | |
3708 | else | |
3709 | job->dev = &shost->shost_gendev; | |
3710 | get_device(job->dev); /* take a reference for the request */ | |
3711 | ||
3712 | job->ref_cnt = 1; | |
3713 | ||
3714 | return 0; | |
3715 | ||
3716 | ||
3717 | failjob_rls_rqst_payload: | |
3718 | kfree(job->request_payload.sg_list); | |
3719 | failjob_rls_job: | |
3720 | kfree(job); | |
3721 | return -ENOMEM; | |
3722 | } | |
3723 | ||
3724 | ||
3725 | enum fc_dispatch_result { | |
3726 | FC_DISPATCH_BREAK, /* on return, q is locked, break from q loop */ | |
3727 | FC_DISPATCH_LOCKED, /* on return, q is locked, continue on */ | |
3728 | FC_DISPATCH_UNLOCKED, /* on return, q is unlocked, continue on */ | |
3729 | }; | |
3730 | ||
3731 | ||
3732 | /** | |
3733 | * fc_bsg_host_dispatch - process fc host bsg requests and dispatch to LLDD | |
5415907a | 3734 | * @q: fc host request queue |
9e4f5e29 JS |
3735 | * @shost: scsi host rport attached to |
3736 | * @job: bsg job to be processed | |
3737 | */ | |
3738 | static enum fc_dispatch_result | |
3739 | fc_bsg_host_dispatch(struct request_queue *q, struct Scsi_Host *shost, | |
3740 | struct fc_bsg_job *job) | |
3741 | { | |
3742 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
3743 | int cmdlen = sizeof(uint32_t); /* start with length of msgcode */ | |
3744 | int ret; | |
3745 | ||
3746 | /* Validate the host command */ | |
3747 | switch (job->request->msgcode) { | |
3748 | case FC_BSG_HST_ADD_RPORT: | |
3749 | cmdlen += sizeof(struct fc_bsg_host_add_rport); | |
3750 | break; | |
3751 | ||
3752 | case FC_BSG_HST_DEL_RPORT: | |
3753 | cmdlen += sizeof(struct fc_bsg_host_del_rport); | |
3754 | break; | |
3755 | ||
3756 | case FC_BSG_HST_ELS_NOLOGIN: | |
3757 | cmdlen += sizeof(struct fc_bsg_host_els); | |
3758 | /* there better be a xmt and rcv payloads */ | |
3759 | if ((!job->request_payload.payload_len) || | |
3760 | (!job->reply_payload.payload_len)) { | |
3761 | ret = -EINVAL; | |
3762 | goto fail_host_msg; | |
3763 | } | |
3764 | break; | |
3765 | ||
3766 | case FC_BSG_HST_CT: | |
3767 | cmdlen += sizeof(struct fc_bsg_host_ct); | |
3768 | /* there better be xmt and rcv payloads */ | |
3769 | if ((!job->request_payload.payload_len) || | |
3770 | (!job->reply_payload.payload_len)) { | |
3771 | ret = -EINVAL; | |
3772 | goto fail_host_msg; | |
3773 | } | |
3774 | break; | |
3775 | ||
3776 | case FC_BSG_HST_VENDOR: | |
3777 | cmdlen += sizeof(struct fc_bsg_host_vendor); | |
3778 | if ((shost->hostt->vendor_id == 0L) || | |
3779 | (job->request->rqst_data.h_vendor.vendor_id != | |
3780 | shost->hostt->vendor_id)) { | |
3781 | ret = -ESRCH; | |
3782 | goto fail_host_msg; | |
3783 | } | |
3784 | break; | |
3785 | ||
3786 | default: | |
3787 | ret = -EBADR; | |
3788 | goto fail_host_msg; | |
3789 | } | |
3790 | ||
3791 | /* check if we really have all the request data needed */ | |
3792 | if (job->request_len < cmdlen) { | |
3793 | ret = -ENOMSG; | |
3794 | goto fail_host_msg; | |
3795 | } | |
3796 | ||
3797 | ret = i->f->bsg_request(job); | |
3798 | if (!ret) | |
3799 | return FC_DISPATCH_UNLOCKED; | |
3800 | ||
3801 | fail_host_msg: | |
3802 | /* return the errno failure code as the only status */ | |
3803 | BUG_ON(job->reply_len < sizeof(uint32_t)); | |
61ec33eb | 3804 | job->reply->reply_payload_rcv_len = 0; |
9e4f5e29 JS |
3805 | job->reply->result = ret; |
3806 | job->reply_len = sizeof(uint32_t); | |
3807 | fc_bsg_jobdone(job); | |
3808 | return FC_DISPATCH_UNLOCKED; | |
3809 | } | |
3810 | ||
3811 | ||
3812 | /* | |
3813 | * fc_bsg_goose_queue - restart rport queue in case it was stopped | |
3814 | * @rport: rport to be restarted | |
3815 | */ | |
3816 | static void | |
3817 | fc_bsg_goose_queue(struct fc_rport *rport) | |
3818 | { | |
9e4f5e29 JS |
3819 | if (!rport->rqst_q) |
3820 | return; | |
3821 | ||
c21e6beb JA |
3822 | /* |
3823 | * This get/put dance makes no sense | |
3824 | */ | |
9e4f5e29 | 3825 | get_device(&rport->dev); |
c21e6beb | 3826 | blk_run_queue_async(rport->rqst_q); |
9e4f5e29 JS |
3827 | put_device(&rport->dev); |
3828 | } | |
3829 | ||
9e4f5e29 JS |
3830 | /** |
3831 | * fc_bsg_rport_dispatch - process rport bsg requests and dispatch to LLDD | |
5415907a | 3832 | * @q: rport request queue |
9e4f5e29 JS |
3833 | * @shost: scsi host rport attached to |
3834 | * @rport: rport request destined to | |
3835 | * @job: bsg job to be processed | |
3836 | */ | |
3837 | static enum fc_dispatch_result | |
3838 | fc_bsg_rport_dispatch(struct request_queue *q, struct Scsi_Host *shost, | |
3839 | struct fc_rport *rport, struct fc_bsg_job *job) | |
3840 | { | |
3841 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
3842 | int cmdlen = sizeof(uint32_t); /* start with length of msgcode */ | |
3843 | int ret; | |
3844 | ||
3845 | /* Validate the rport command */ | |
3846 | switch (job->request->msgcode) { | |
3847 | case FC_BSG_RPT_ELS: | |
3848 | cmdlen += sizeof(struct fc_bsg_rport_els); | |
3849 | goto check_bidi; | |
3850 | ||
3851 | case FC_BSG_RPT_CT: | |
3852 | cmdlen += sizeof(struct fc_bsg_rport_ct); | |
3853 | check_bidi: | |
3854 | /* there better be xmt and rcv payloads */ | |
3855 | if ((!job->request_payload.payload_len) || | |
3856 | (!job->reply_payload.payload_len)) { | |
3857 | ret = -EINVAL; | |
3858 | goto fail_rport_msg; | |
3859 | } | |
3860 | break; | |
3861 | default: | |
3862 | ret = -EBADR; | |
3863 | goto fail_rport_msg; | |
3864 | } | |
3865 | ||
3866 | /* check if we really have all the request data needed */ | |
3867 | if (job->request_len < cmdlen) { | |
3868 | ret = -ENOMSG; | |
3869 | goto fail_rport_msg; | |
3870 | } | |
3871 | ||
3872 | ret = i->f->bsg_request(job); | |
3873 | if (!ret) | |
3874 | return FC_DISPATCH_UNLOCKED; | |
3875 | ||
3876 | fail_rport_msg: | |
3877 | /* return the errno failure code as the only status */ | |
3878 | BUG_ON(job->reply_len < sizeof(uint32_t)); | |
61ec33eb | 3879 | job->reply->reply_payload_rcv_len = 0; |
9e4f5e29 JS |
3880 | job->reply->result = ret; |
3881 | job->reply_len = sizeof(uint32_t); | |
3882 | fc_bsg_jobdone(job); | |
3883 | return FC_DISPATCH_UNLOCKED; | |
3884 | } | |
3885 | ||
3886 | ||
3887 | /** | |
3888 | * fc_bsg_request_handler - generic handler for bsg requests | |
3889 | * @q: request queue to manage | |
3890 | * @shost: Scsi_Host related to the bsg object | |
3891 | * @rport: FC remote port related to the bsg object (optional) | |
3892 | * @dev: device structure for bsg object | |
3893 | */ | |
3894 | static void | |
3895 | fc_bsg_request_handler(struct request_queue *q, struct Scsi_Host *shost, | |
3896 | struct fc_rport *rport, struct device *dev) | |
3897 | { | |
3898 | struct request *req; | |
3899 | struct fc_bsg_job *job; | |
3900 | enum fc_dispatch_result ret; | |
3901 | ||
3902 | if (!get_device(dev)) | |
3903 | return; | |
3904 | ||
7eaceacc | 3905 | while (1) { |
2bc1c59d MC |
3906 | if (rport && (rport->port_state == FC_PORTSTATE_BLOCKED) && |
3907 | !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)) | |
3908 | break; | |
9e4f5e29 JS |
3909 | |
3910 | req = blk_fetch_request(q); | |
3911 | if (!req) | |
3912 | break; | |
3913 | ||
3914 | if (rport && (rport->port_state != FC_PORTSTATE_ONLINE)) { | |
3915 | req->errors = -ENXIO; | |
3916 | spin_unlock_irq(q->queue_lock); | |
d88a714b | 3917 | blk_end_request_all(req, -ENXIO); |
9e4f5e29 JS |
3918 | spin_lock_irq(q->queue_lock); |
3919 | continue; | |
3920 | } | |
3921 | ||
3922 | spin_unlock_irq(q->queue_lock); | |
3923 | ||
3924 | ret = fc_req_to_bsgjob(shost, rport, req); | |
3925 | if (ret) { | |
3926 | req->errors = ret; | |
d88a714b | 3927 | blk_end_request_all(req, ret); |
9e4f5e29 JS |
3928 | spin_lock_irq(q->queue_lock); |
3929 | continue; | |
3930 | } | |
3931 | ||
3932 | job = req->special; | |
3933 | ||
3934 | /* check if we have the msgcode value at least */ | |
3935 | if (job->request_len < sizeof(uint32_t)) { | |
3936 | BUG_ON(job->reply_len < sizeof(uint32_t)); | |
61ec33eb | 3937 | job->reply->reply_payload_rcv_len = 0; |
9e4f5e29 JS |
3938 | job->reply->result = -ENOMSG; |
3939 | job->reply_len = sizeof(uint32_t); | |
3940 | fc_bsg_jobdone(job); | |
3941 | spin_lock_irq(q->queue_lock); | |
3942 | continue; | |
3943 | } | |
3944 | ||
3945 | /* the dispatch routines will unlock the queue_lock */ | |
3946 | if (rport) | |
3947 | ret = fc_bsg_rport_dispatch(q, shost, rport, job); | |
3948 | else | |
3949 | ret = fc_bsg_host_dispatch(q, shost, job); | |
3950 | ||
3951 | /* did dispatcher hit state that can't process any more */ | |
3952 | if (ret == FC_DISPATCH_BREAK) | |
3953 | break; | |
3954 | ||
3955 | /* did dispatcher had released the lock */ | |
3956 | if (ret == FC_DISPATCH_UNLOCKED) | |
3957 | spin_lock_irq(q->queue_lock); | |
3958 | } | |
3959 | ||
3960 | spin_unlock_irq(q->queue_lock); | |
3961 | put_device(dev); | |
3962 | spin_lock_irq(q->queue_lock); | |
3963 | } | |
3964 | ||
3965 | ||
3966 | /** | |
3967 | * fc_bsg_host_handler - handler for bsg requests for a fc host | |
3968 | * @q: fc host request queue | |
3969 | */ | |
3970 | static void | |
3971 | fc_bsg_host_handler(struct request_queue *q) | |
3972 | { | |
3973 | struct Scsi_Host *shost = q->queuedata; | |
3974 | ||
3975 | fc_bsg_request_handler(q, shost, NULL, &shost->shost_gendev); | |
3976 | } | |
3977 | ||
3978 | ||
3979 | /** | |
3980 | * fc_bsg_rport_handler - handler for bsg requests for a fc rport | |
3981 | * @q: rport request queue | |
3982 | */ | |
3983 | static void | |
3984 | fc_bsg_rport_handler(struct request_queue *q) | |
3985 | { | |
3986 | struct fc_rport *rport = q->queuedata; | |
3987 | struct Scsi_Host *shost = rport_to_shost(rport); | |
3988 | ||
3989 | fc_bsg_request_handler(q, shost, rport, &rport->dev); | |
3990 | } | |
3991 | ||
3992 | ||
3993 | /** | |
3994 | * fc_bsg_hostadd - Create and add the bsg hooks so we can receive requests | |
3995 | * @shost: shost for fc_host | |
3996 | * @fc_host: fc_host adding the structures to | |
3997 | */ | |
3998 | static int | |
3999 | fc_bsg_hostadd(struct Scsi_Host *shost, struct fc_host_attrs *fc_host) | |
4000 | { | |
4001 | struct device *dev = &shost->shost_gendev; | |
4002 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
4003 | struct request_queue *q; | |
4004 | int err; | |
3c559ea8 | 4005 | char bsg_name[20]; |
9e4f5e29 JS |
4006 | |
4007 | fc_host->rqst_q = NULL; | |
4008 | ||
4009 | if (!i->f->bsg_request) | |
4010 | return -ENOTSUPP; | |
4011 | ||
4012 | snprintf(bsg_name, sizeof(bsg_name), | |
4013 | "fc_host%d", shost->host_no); | |
4014 | ||
4015 | q = __scsi_alloc_queue(shost, fc_bsg_host_handler); | |
4016 | if (!q) { | |
4017 | printk(KERN_ERR "fc_host%d: bsg interface failed to " | |
4018 | "initialize - no request queue\n", | |
4019 | shost->host_no); | |
4020 | return -ENOMEM; | |
4021 | } | |
4022 | ||
4023 | q->queuedata = shost; | |
4024 | queue_flag_set_unlocked(QUEUE_FLAG_BIDI, q); | |
b5c6f776 | 4025 | blk_queue_softirq_done(q, fc_bsg_softirq_done); |
9e4f5e29 JS |
4026 | blk_queue_rq_timed_out(q, fc_bsg_job_timeout); |
4027 | blk_queue_rq_timeout(q, FC_DEFAULT_BSG_TIMEOUT); | |
4028 | ||
4029 | err = bsg_register_queue(q, dev, bsg_name, NULL); | |
4030 | if (err) { | |
4031 | printk(KERN_ERR "fc_host%d: bsg interface failed to " | |
4032 | "initialize - register queue\n", | |
4033 | shost->host_no); | |
4034 | blk_cleanup_queue(q); | |
4035 | return err; | |
4036 | } | |
4037 | ||
4038 | fc_host->rqst_q = q; | |
4039 | return 0; | |
4040 | } | |
4041 | ||
4042 | ||
4043 | /** | |
4044 | * fc_bsg_rportadd - Create and add the bsg hooks so we can receive requests | |
4045 | * @shost: shost that rport is attached to | |
4046 | * @rport: rport that the bsg hooks are being attached to | |
4047 | */ | |
4048 | static int | |
4049 | fc_bsg_rportadd(struct Scsi_Host *shost, struct fc_rport *rport) | |
4050 | { | |
4051 | struct device *dev = &rport->dev; | |
4052 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
4053 | struct request_queue *q; | |
4054 | int err; | |
4055 | ||
4056 | rport->rqst_q = NULL; | |
4057 | ||
4058 | if (!i->f->bsg_request) | |
4059 | return -ENOTSUPP; | |
4060 | ||
4061 | q = __scsi_alloc_queue(shost, fc_bsg_rport_handler); | |
4062 | if (!q) { | |
4063 | printk(KERN_ERR "%s: bsg interface failed to " | |
4064 | "initialize - no request queue\n", | |
4065 | dev->kobj.name); | |
4066 | return -ENOMEM; | |
4067 | } | |
4068 | ||
4069 | q->queuedata = rport; | |
4070 | queue_flag_set_unlocked(QUEUE_FLAG_BIDI, q); | |
b5c6f776 | 4071 | blk_queue_softirq_done(q, fc_bsg_softirq_done); |
9e4f5e29 JS |
4072 | blk_queue_rq_timed_out(q, fc_bsg_job_timeout); |
4073 | blk_queue_rq_timeout(q, BLK_DEFAULT_SG_TIMEOUT); | |
4074 | ||
4075 | err = bsg_register_queue(q, dev, NULL, NULL); | |
4076 | if (err) { | |
4077 | printk(KERN_ERR "%s: bsg interface failed to " | |
4078 | "initialize - register queue\n", | |
4079 | dev->kobj.name); | |
4080 | blk_cleanup_queue(q); | |
4081 | return err; | |
4082 | } | |
4083 | ||
4084 | rport->rqst_q = q; | |
4085 | return 0; | |
4086 | } | |
4087 | ||
4088 | ||
4089 | /** | |
4090 | * fc_bsg_remove - Deletes the bsg hooks on fchosts/rports | |
4091 | * @q: the request_queue that is to be torn down. | |
78d16341 JS |
4092 | * |
4093 | * Notes: | |
4094 | * Before unregistering the queue empty any requests that are blocked | |
4095 | * | |
4096 | * | |
9e4f5e29 JS |
4097 | */ |
4098 | static void | |
4099 | fc_bsg_remove(struct request_queue *q) | |
4100 | { | |
78d16341 JS |
4101 | struct request *req; /* block request */ |
4102 | int counts; /* totals for request_list count and starved */ | |
4103 | ||
9e4f5e29 | 4104 | if (q) { |
78d16341 JS |
4105 | /* Stop taking in new requests */ |
4106 | spin_lock_irq(q->queue_lock); | |
4107 | blk_stop_queue(q); | |
4108 | ||
4109 | /* drain all requests in the queue */ | |
4110 | while (1) { | |
4111 | /* need the lock to fetch a request | |
4112 | * this may fetch the same reqeust as the previous pass | |
4113 | */ | |
4114 | req = blk_fetch_request(q); | |
4115 | /* save requests in use and starved */ | |
4116 | counts = q->rq.count[0] + q->rq.count[1] + | |
4117 | q->rq.starved[0] + q->rq.starved[1]; | |
4118 | spin_unlock_irq(q->queue_lock); | |
4119 | /* any requests still outstanding? */ | |
4120 | if (counts == 0) | |
4121 | break; | |
4122 | ||
4123 | /* This may be the same req as the previous iteration, | |
4124 | * always send the blk_end_request_all after a prefetch. | |
4125 | * It is not okay to not end the request because the | |
4126 | * prefetch started the request. | |
4127 | */ | |
4128 | if (req) { | |
4129 | /* return -ENXIO to indicate that this queue is | |
4130 | * going away | |
4131 | */ | |
4132 | req->errors = -ENXIO; | |
4133 | blk_end_request_all(req, -ENXIO); | |
4134 | } | |
4135 | ||
4136 | msleep(200); /* allow bsg to possibly finish */ | |
4137 | spin_lock_irq(q->queue_lock); | |
4138 | } | |
4139 | ||
9e4f5e29 JS |
4140 | bsg_unregister_queue(q); |
4141 | blk_cleanup_queue(q); | |
4142 | } | |
4143 | } | |
4144 | ||
4145 | ||
9ef3e4a4 JS |
4146 | /* Original Author: Martin Hicks */ |
4147 | MODULE_AUTHOR("James Smart"); | |
1da177e4 LT |
4148 | MODULE_DESCRIPTION("FC Transport Attributes"); |
4149 | MODULE_LICENSE("GPL"); | |
4150 | ||
4151 | module_init(fc_transport_init); | |
4152 | module_exit(fc_transport_exit); |