Commit | Line | Data |
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9ef3e4a4 | 1 | /* |
1da177e4 LT |
2 | * FiberChannel transport specific attributes exported to sysfs. |
3 | * | |
4 | * Copyright (c) 2003 Silicon Graphics, Inc. All rights reserved. | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
19 | * | |
20 | * ======== | |
21 | * | |
a53eb5e0 | 22 | * Copyright (C) 2004-2007 James Smart, Emulex Corporation |
1da177e4 LT |
23 | * Rewrite for host, target, device, and remote port attributes, |
24 | * statistics, and service functions... | |
9ef3e4a4 | 25 | * Add vports, etc |
1da177e4 LT |
26 | * |
27 | */ | |
28 | #include <linux/module.h> | |
29 | #include <linux/init.h> | |
5a0e3ad6 | 30 | #include <linux/slab.h> |
65d430fa | 31 | #include <linux/delay.h> |
ecc30990 | 32 | #include <linux/kernel.h> |
1da177e4 LT |
33 | #include <scsi/scsi_device.h> |
34 | #include <scsi/scsi_host.h> | |
35 | #include <scsi/scsi_transport.h> | |
36 | #include <scsi/scsi_transport_fc.h> | |
c829c394 | 37 | #include <scsi/scsi_cmnd.h> |
84314fd4 JS |
38 | #include <linux/netlink.h> |
39 | #include <net/netlink.h> | |
40 | #include <scsi/scsi_netlink_fc.h> | |
9e4f5e29 | 41 | #include <scsi/scsi_bsg_fc.h> |
1da177e4 | 42 | #include "scsi_priv.h" |
7525236d | 43 | #include "scsi_transport_fc_internal.h" |
1da177e4 | 44 | |
aedf3497 | 45 | static int fc_queue_work(struct Scsi_Host *, struct work_struct *); |
9ef3e4a4 | 46 | static void fc_vport_sched_delete(struct work_struct *work); |
a30c3f69 | 47 | static int fc_vport_setup(struct Scsi_Host *shost, int channel, |
a53eb5e0 JS |
48 | struct device *pdev, struct fc_vport_identifiers *ids, |
49 | struct fc_vport **vport); | |
9e4f5e29 JS |
50 | static int fc_bsg_hostadd(struct Scsi_Host *, struct fc_host_attrs *); |
51 | static int fc_bsg_rportadd(struct Scsi_Host *, struct fc_rport *); | |
52 | static void fc_bsg_remove(struct request_queue *); | |
53 | static void fc_bsg_goose_queue(struct fc_rport *); | |
a53eb5e0 | 54 | |
43ca910a MC |
55 | /* |
56 | * Module Parameters | |
57 | */ | |
58 | ||
59 | /* | |
60 | * dev_loss_tmo: the default number of seconds that the FC transport | |
61 | * should insulate the loss of a remote port. | |
62 | * The maximum will be capped by the value of SCSI_DEVICE_BLOCK_MAX_TIMEOUT. | |
63 | */ | |
64 | static unsigned int fc_dev_loss_tmo = 60; /* seconds */ | |
65 | ||
66 | module_param_named(dev_loss_tmo, fc_dev_loss_tmo, uint, S_IRUGO|S_IWUSR); | |
67 | MODULE_PARM_DESC(dev_loss_tmo, | |
68 | "Maximum number of seconds that the FC transport should" | |
69 | " insulate the loss of a remote port. Once this value is" | |
70 | " exceeded, the scsi target is removed. Value should be" | |
71 | " between 1 and SCSI_DEVICE_BLOCK_MAX_TIMEOUT if" | |
72 | " fast_io_fail_tmo is not set."); | |
73 | ||
1da177e4 LT |
74 | /* |
75 | * Redefine so that we can have same named attributes in the | |
76 | * sdev/starget/host objects. | |
77 | */ | |
ee959b00 TJ |
78 | #define FC_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \ |
79 | struct device_attribute device_attr_##_prefix##_##_name = \ | |
1da177e4 LT |
80 | __ATTR(_name,_mode,_show,_store) |
81 | ||
82 | #define fc_enum_name_search(title, table_type, table) \ | |
83 | static const char *get_fc_##title##_name(enum table_type table_key) \ | |
84 | { \ | |
85 | int i; \ | |
86 | char *name = NULL; \ | |
87 | \ | |
6391a113 | 88 | for (i = 0; i < ARRAY_SIZE(table); i++) { \ |
1da177e4 LT |
89 | if (table[i].value == table_key) { \ |
90 | name = table[i].name; \ | |
91 | break; \ | |
92 | } \ | |
93 | } \ | |
94 | return name; \ | |
95 | } | |
96 | ||
97 | #define fc_enum_name_match(title, table_type, table) \ | |
98 | static int get_fc_##title##_match(const char *table_key, \ | |
99 | enum table_type *value) \ | |
100 | { \ | |
101 | int i; \ | |
102 | \ | |
6391a113 | 103 | for (i = 0; i < ARRAY_SIZE(table); i++) { \ |
1da177e4 LT |
104 | if (strncmp(table_key, table[i].name, \ |
105 | table[i].matchlen) == 0) { \ | |
106 | *value = table[i].value; \ | |
107 | return 0; /* success */ \ | |
108 | } \ | |
109 | } \ | |
110 | return 1; /* failure */ \ | |
111 | } | |
112 | ||
113 | ||
114 | /* Convert fc_port_type values to ascii string name */ | |
115 | static struct { | |
116 | enum fc_port_type value; | |
117 | char *name; | |
118 | } fc_port_type_names[] = { | |
119 | { FC_PORTTYPE_UNKNOWN, "Unknown" }, | |
120 | { FC_PORTTYPE_OTHER, "Other" }, | |
121 | { FC_PORTTYPE_NOTPRESENT, "Not Present" }, | |
122 | { FC_PORTTYPE_NPORT, "NPort (fabric via point-to-point)" }, | |
123 | { FC_PORTTYPE_NLPORT, "NLPort (fabric via loop)" }, | |
124 | { FC_PORTTYPE_LPORT, "LPort (private loop)" }, | |
951948a3 | 125 | { FC_PORTTYPE_PTP, "Point-To-Point (direct nport connection)" }, |
a53eb5e0 | 126 | { FC_PORTTYPE_NPIV, "NPIV VPORT" }, |
1da177e4 LT |
127 | }; |
128 | fc_enum_name_search(port_type, fc_port_type, fc_port_type_names) | |
129 | #define FC_PORTTYPE_MAX_NAMELEN 50 | |
130 | ||
a53eb5e0 JS |
131 | /* Reuse fc_port_type enum function for vport_type */ |
132 | #define get_fc_vport_type_name get_fc_port_type_name | |
133 | ||
1da177e4 | 134 | |
84314fd4 JS |
135 | /* Convert fc_host_event_code values to ascii string name */ |
136 | static const struct { | |
137 | enum fc_host_event_code value; | |
138 | char *name; | |
139 | } fc_host_event_code_names[] = { | |
140 | { FCH_EVT_LIP, "lip" }, | |
141 | { FCH_EVT_LINKUP, "link_up" }, | |
142 | { FCH_EVT_LINKDOWN, "link_down" }, | |
143 | { FCH_EVT_LIPRESET, "lip_reset" }, | |
144 | { FCH_EVT_RSCN, "rscn" }, | |
145 | { FCH_EVT_ADAPTER_CHANGE, "adapter_chg" }, | |
146 | { FCH_EVT_PORT_UNKNOWN, "port_unknown" }, | |
147 | { FCH_EVT_PORT_ONLINE, "port_online" }, | |
148 | { FCH_EVT_PORT_OFFLINE, "port_offline" }, | |
149 | { FCH_EVT_PORT_FABRIC, "port_fabric" }, | |
150 | { FCH_EVT_LINK_UNKNOWN, "link_unknown" }, | |
151 | { FCH_EVT_VENDOR_UNIQUE, "vendor_unique" }, | |
152 | }; | |
153 | fc_enum_name_search(host_event_code, fc_host_event_code, | |
154 | fc_host_event_code_names) | |
155 | #define FC_HOST_EVENT_CODE_MAX_NAMELEN 30 | |
156 | ||
157 | ||
1da177e4 LT |
158 | /* Convert fc_port_state values to ascii string name */ |
159 | static struct { | |
160 | enum fc_port_state value; | |
161 | char *name; | |
162 | } fc_port_state_names[] = { | |
163 | { FC_PORTSTATE_UNKNOWN, "Unknown" }, | |
164 | { FC_PORTSTATE_NOTPRESENT, "Not Present" }, | |
165 | { FC_PORTSTATE_ONLINE, "Online" }, | |
166 | { FC_PORTSTATE_OFFLINE, "Offline" }, | |
167 | { FC_PORTSTATE_BLOCKED, "Blocked" }, | |
168 | { FC_PORTSTATE_BYPASSED, "Bypassed" }, | |
169 | { FC_PORTSTATE_DIAGNOSTICS, "Diagnostics" }, | |
170 | { FC_PORTSTATE_LINKDOWN, "Linkdown" }, | |
171 | { FC_PORTSTATE_ERROR, "Error" }, | |
172 | { FC_PORTSTATE_LOOPBACK, "Loopback" }, | |
42e33148 | 173 | { FC_PORTSTATE_DELETED, "Deleted" }, |
1da177e4 LT |
174 | }; |
175 | fc_enum_name_search(port_state, fc_port_state, fc_port_state_names) | |
176 | #define FC_PORTSTATE_MAX_NAMELEN 20 | |
177 | ||
178 | ||
a53eb5e0 JS |
179 | /* Convert fc_vport_state values to ascii string name */ |
180 | static struct { | |
181 | enum fc_vport_state value; | |
182 | char *name; | |
183 | } fc_vport_state_names[] = { | |
184 | { FC_VPORT_UNKNOWN, "Unknown" }, | |
185 | { FC_VPORT_ACTIVE, "Active" }, | |
186 | { FC_VPORT_DISABLED, "Disabled" }, | |
187 | { FC_VPORT_LINKDOWN, "Linkdown" }, | |
188 | { FC_VPORT_INITIALIZING, "Initializing" }, | |
189 | { FC_VPORT_NO_FABRIC_SUPP, "No Fabric Support" }, | |
190 | { FC_VPORT_NO_FABRIC_RSCS, "No Fabric Resources" }, | |
191 | { FC_VPORT_FABRIC_LOGOUT, "Fabric Logout" }, | |
192 | { FC_VPORT_FABRIC_REJ_WWN, "Fabric Rejected WWN" }, | |
193 | { FC_VPORT_FAILED, "VPort Failed" }, | |
194 | }; | |
195 | fc_enum_name_search(vport_state, fc_vport_state, fc_vport_state_names) | |
196 | #define FC_VPORTSTATE_MAX_NAMELEN 24 | |
197 | ||
198 | /* Reuse fc_vport_state enum function for vport_last_state */ | |
199 | #define get_fc_vport_last_state_name get_fc_vport_state_name | |
200 | ||
201 | ||
1da177e4 | 202 | /* Convert fc_tgtid_binding_type values to ascii string name */ |
0ad78200 | 203 | static const struct { |
1da177e4 LT |
204 | enum fc_tgtid_binding_type value; |
205 | char *name; | |
206 | int matchlen; | |
207 | } fc_tgtid_binding_type_names[] = { | |
208 | { FC_TGTID_BIND_NONE, "none", 4 }, | |
209 | { FC_TGTID_BIND_BY_WWPN, "wwpn (World Wide Port Name)", 4 }, | |
210 | { FC_TGTID_BIND_BY_WWNN, "wwnn (World Wide Node Name)", 4 }, | |
211 | { FC_TGTID_BIND_BY_ID, "port_id (FC Address)", 7 }, | |
212 | }; | |
213 | fc_enum_name_search(tgtid_bind_type, fc_tgtid_binding_type, | |
214 | fc_tgtid_binding_type_names) | |
215 | fc_enum_name_match(tgtid_bind_type, fc_tgtid_binding_type, | |
216 | fc_tgtid_binding_type_names) | |
217 | #define FC_BINDTYPE_MAX_NAMELEN 30 | |
218 | ||
219 | ||
220 | #define fc_bitfield_name_search(title, table) \ | |
221 | static ssize_t \ | |
222 | get_fc_##title##_names(u32 table_key, char *buf) \ | |
223 | { \ | |
224 | char *prefix = ""; \ | |
225 | ssize_t len = 0; \ | |
226 | int i; \ | |
227 | \ | |
6391a113 | 228 | for (i = 0; i < ARRAY_SIZE(table); i++) { \ |
1da177e4 LT |
229 | if (table[i].value & table_key) { \ |
230 | len += sprintf(buf + len, "%s%s", \ | |
231 | prefix, table[i].name); \ | |
232 | prefix = ", "; \ | |
233 | } \ | |
234 | } \ | |
235 | len += sprintf(buf + len, "\n"); \ | |
236 | return len; \ | |
237 | } | |
238 | ||
239 | ||
240 | /* Convert FC_COS bit values to ascii string name */ | |
0ad78200 | 241 | static const struct { |
1da177e4 LT |
242 | u32 value; |
243 | char *name; | |
244 | } fc_cos_names[] = { | |
245 | { FC_COS_CLASS1, "Class 1" }, | |
246 | { FC_COS_CLASS2, "Class 2" }, | |
247 | { FC_COS_CLASS3, "Class 3" }, | |
248 | { FC_COS_CLASS4, "Class 4" }, | |
249 | { FC_COS_CLASS6, "Class 6" }, | |
250 | }; | |
251 | fc_bitfield_name_search(cos, fc_cos_names) | |
252 | ||
253 | ||
254 | /* Convert FC_PORTSPEED bit values to ascii string name */ | |
0ad78200 | 255 | static const struct { |
1da177e4 LT |
256 | u32 value; |
257 | char *name; | |
258 | } fc_port_speed_names[] = { | |
259 | { FC_PORTSPEED_1GBIT, "1 Gbit" }, | |
260 | { FC_PORTSPEED_2GBIT, "2 Gbit" }, | |
261 | { FC_PORTSPEED_4GBIT, "4 Gbit" }, | |
262 | { FC_PORTSPEED_10GBIT, "10 Gbit" }, | |
c3d2350a JS |
263 | { FC_PORTSPEED_8GBIT, "8 Gbit" }, |
264 | { FC_PORTSPEED_16GBIT, "16 Gbit" }, | |
1da177e4 LT |
265 | { FC_PORTSPEED_NOT_NEGOTIATED, "Not Negotiated" }, |
266 | }; | |
267 | fc_bitfield_name_search(port_speed, fc_port_speed_names) | |
268 | ||
269 | ||
270 | static int | |
271 | show_fc_fc4s (char *buf, u8 *fc4_list) | |
272 | { | |
273 | int i, len=0; | |
274 | ||
275 | for (i = 0; i < FC_FC4_LIST_SIZE; i++, fc4_list++) | |
276 | len += sprintf(buf + len , "0x%02x ", *fc4_list); | |
277 | len += sprintf(buf + len, "\n"); | |
278 | return len; | |
279 | } | |
280 | ||
281 | ||
a53eb5e0 | 282 | /* Convert FC_PORT_ROLE bit values to ascii string name */ |
0ad78200 | 283 | static const struct { |
1da177e4 LT |
284 | u32 value; |
285 | char *name; | |
a53eb5e0 JS |
286 | } fc_port_role_names[] = { |
287 | { FC_PORT_ROLE_FCP_TARGET, "FCP Target" }, | |
288 | { FC_PORT_ROLE_FCP_INITIATOR, "FCP Initiator" }, | |
289 | { FC_PORT_ROLE_IP_PORT, "IP Port" }, | |
1da177e4 | 290 | }; |
a53eb5e0 | 291 | fc_bitfield_name_search(port_roles, fc_port_role_names) |
1da177e4 LT |
292 | |
293 | /* | |
294 | * Define roles that are specific to port_id. Values are relative to ROLE_MASK. | |
295 | */ | |
296 | #define FC_WELLKNOWN_PORTID_MASK 0xfffff0 | |
297 | #define FC_WELLKNOWN_ROLE_MASK 0x00000f | |
298 | #define FC_FPORT_PORTID 0x00000e | |
299 | #define FC_FABCTLR_PORTID 0x00000d | |
300 | #define FC_DIRSRVR_PORTID 0x00000c | |
301 | #define FC_TIMESRVR_PORTID 0x00000b | |
302 | #define FC_MGMTSRVR_PORTID 0x00000a | |
303 | ||
304 | ||
c4028958 DH |
305 | static void fc_timeout_deleted_rport(struct work_struct *work); |
306 | static void fc_timeout_fail_rport_io(struct work_struct *work); | |
307 | static void fc_scsi_scan_rport(struct work_struct *work); | |
1da177e4 LT |
308 | |
309 | /* | |
310 | * Attribute counts pre object type... | |
311 | * Increase these values if you add attributes | |
312 | */ | |
313 | #define FC_STARGET_NUM_ATTRS 3 | |
0f29b966 | 314 | #define FC_RPORT_NUM_ATTRS 10 |
a53eb5e0 | 315 | #define FC_VPORT_NUM_ATTRS 9 |
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); | |
aedf3497 JS |
425 | fc_host->work_q = create_singlethread_workqueue( |
426 | fc_host->work_q_name); | |
427 | if (!fc_host->work_q) | |
428 | return -ENOMEM; | |
429 | ||
43ca910a | 430 | fc_host->dev_loss_tmo = fc_dev_loss_tmo; |
aab0de24 KS |
431 | snprintf(fc_host->devloss_work_q_name, |
432 | sizeof(fc_host->devloss_work_q_name), | |
433 | "fc_dl_%d", shost->host_no); | |
aedf3497 JS |
434 | fc_host->devloss_work_q = create_singlethread_workqueue( |
435 | fc_host->devloss_work_q_name); | |
436 | if (!fc_host->devloss_work_q) { | |
437 | destroy_workqueue(fc_host->work_q); | |
438 | fc_host->work_q = NULL; | |
439 | return -ENOMEM; | |
440 | } | |
441 | ||
9e4f5e29 JS |
442 | fc_bsg_hostadd(shost, fc_host); |
443 | /* ignore any bsg add error - we just can't do sgio */ | |
444 | ||
445 | return 0; | |
446 | } | |
447 | ||
448 | static int fc_host_remove(struct transport_container *tc, struct device *dev, | |
449 | struct device *cdev) | |
450 | { | |
451 | struct Scsi_Host *shost = dev_to_shost(dev); | |
452 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); | |
453 | ||
454 | fc_bsg_remove(fc_host->rqst_q); | |
1da177e4 LT |
455 | return 0; |
456 | } | |
457 | ||
458 | static DECLARE_TRANSPORT_CLASS(fc_host_class, | |
459 | "fc_host", | |
460 | fc_host_setup, | |
9e4f5e29 | 461 | fc_host_remove, |
1da177e4 LT |
462 | NULL); |
463 | ||
464 | /* | |
465 | * Setup and Remove actions for remote ports are handled | |
466 | * in the service functions below. | |
467 | */ | |
468 | static DECLARE_TRANSPORT_CLASS(fc_rport_class, | |
469 | "fc_remote_ports", | |
470 | NULL, | |
471 | NULL, | |
472 | NULL); | |
473 | ||
a53eb5e0 JS |
474 | /* |
475 | * Setup and Remove actions for virtual ports are handled | |
476 | * in the service functions below. | |
477 | */ | |
478 | static DECLARE_TRANSPORT_CLASS(fc_vport_class, | |
479 | "fc_vports", | |
480 | NULL, | |
481 | NULL, | |
482 | NULL); | |
483 | ||
eb44820c | 484 | /* |
84314fd4 | 485 | * Netlink Infrastructure |
eb44820c | 486 | */ |
84314fd4 JS |
487 | |
488 | static atomic_t fc_event_seq; | |
489 | ||
490 | /** | |
491 | * fc_get_event_number - Obtain the next sequential FC event number | |
492 | * | |
493 | * Notes: | |
eb44820c | 494 | * We could have inlined this, but it would have required fc_event_seq to |
84314fd4 JS |
495 | * be exposed. For now, live with the subroutine call. |
496 | * Atomic used to avoid lock/unlock... | |
eb44820c | 497 | */ |
84314fd4 JS |
498 | u32 |
499 | fc_get_event_number(void) | |
500 | { | |
501 | return atomic_add_return(1, &fc_event_seq); | |
502 | } | |
503 | EXPORT_SYMBOL(fc_get_event_number); | |
504 | ||
505 | ||
506 | /** | |
507 | * fc_host_post_event - called to post an even on an fc_host. | |
84314fd4 JS |
508 | * @shost: host the event occurred on |
509 | * @event_number: fc event number obtained from get_fc_event_number() | |
510 | * @event_code: fc_host event being posted | |
511 | * @event_data: 32bits of data for the event being posted | |
512 | * | |
513 | * Notes: | |
514 | * This routine assumes no locks are held on entry. | |
eb44820c | 515 | */ |
84314fd4 JS |
516 | void |
517 | fc_host_post_event(struct Scsi_Host *shost, u32 event_number, | |
518 | enum fc_host_event_code event_code, u32 event_data) | |
519 | { | |
520 | struct sk_buff *skb; | |
521 | struct nlmsghdr *nlh; | |
522 | struct fc_nl_event *event; | |
523 | const char *name; | |
524 | u32 len, skblen; | |
525 | int err; | |
526 | ||
527 | if (!scsi_nl_sock) { | |
528 | err = -ENOENT; | |
529 | goto send_fail; | |
530 | } | |
531 | ||
532 | len = FC_NL_MSGALIGN(sizeof(*event)); | |
533 | skblen = NLMSG_SPACE(len); | |
534 | ||
535 | skb = alloc_skb(skblen, GFP_KERNEL); | |
536 | if (!skb) { | |
537 | err = -ENOBUFS; | |
538 | goto send_fail; | |
539 | } | |
540 | ||
541 | nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, | |
542 | skblen - sizeof(*nlh), 0); | |
543 | if (!nlh) { | |
544 | err = -ENOBUFS; | |
545 | goto send_fail_skb; | |
546 | } | |
547 | event = NLMSG_DATA(nlh); | |
548 | ||
549 | INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC, | |
550 | FC_NL_ASYNC_EVENT, len); | |
551 | event->seconds = get_seconds(); | |
552 | event->vendor_id = 0; | |
553 | event->host_no = shost->host_no; | |
554 | event->event_datalen = sizeof(u32); /* bytes */ | |
555 | event->event_num = event_number; | |
556 | event->event_code = event_code; | |
557 | event->event_data = event_data; | |
558 | ||
ff491a73 PNA |
559 | nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS, |
560 | GFP_KERNEL); | |
84314fd4 JS |
561 | return; |
562 | ||
563 | send_fail_skb: | |
564 | kfree_skb(skb); | |
565 | send_fail: | |
566 | name = get_fc_host_event_code_name(event_code); | |
567 | printk(KERN_WARNING | |
568 | "%s: Dropped Event : host %d %s data 0x%08x - err %d\n", | |
cadbd4a5 | 569 | __func__, shost->host_no, |
84314fd4 JS |
570 | (name) ? name : "<unknown>", event_data, err); |
571 | return; | |
572 | } | |
573 | EXPORT_SYMBOL(fc_host_post_event); | |
574 | ||
575 | ||
576 | /** | |
eb44820c | 577 | * fc_host_post_vendor_event - called to post a vendor unique event on an fc_host |
84314fd4 JS |
578 | * @shost: host the event occurred on |
579 | * @event_number: fc event number obtained from get_fc_event_number() | |
580 | * @data_len: amount, in bytes, of vendor unique data | |
581 | * @data_buf: pointer to vendor unique data | |
eb44820c | 582 | * @vendor_id: Vendor id |
84314fd4 JS |
583 | * |
584 | * Notes: | |
585 | * This routine assumes no locks are held on entry. | |
eb44820c | 586 | */ |
84314fd4 JS |
587 | void |
588 | fc_host_post_vendor_event(struct Scsi_Host *shost, u32 event_number, | |
f14e2e29 | 589 | u32 data_len, char * data_buf, u64 vendor_id) |
84314fd4 JS |
590 | { |
591 | struct sk_buff *skb; | |
592 | struct nlmsghdr *nlh; | |
593 | struct fc_nl_event *event; | |
594 | u32 len, skblen; | |
595 | int err; | |
596 | ||
597 | if (!scsi_nl_sock) { | |
598 | err = -ENOENT; | |
599 | goto send_vendor_fail; | |
600 | } | |
601 | ||
602 | len = FC_NL_MSGALIGN(sizeof(*event) + data_len); | |
603 | skblen = NLMSG_SPACE(len); | |
604 | ||
605 | skb = alloc_skb(skblen, GFP_KERNEL); | |
606 | if (!skb) { | |
607 | err = -ENOBUFS; | |
608 | goto send_vendor_fail; | |
609 | } | |
610 | ||
611 | nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, | |
612 | skblen - sizeof(*nlh), 0); | |
613 | if (!nlh) { | |
614 | err = -ENOBUFS; | |
615 | goto send_vendor_fail_skb; | |
616 | } | |
617 | event = NLMSG_DATA(nlh); | |
618 | ||
619 | INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC, | |
620 | FC_NL_ASYNC_EVENT, len); | |
621 | event->seconds = get_seconds(); | |
622 | event->vendor_id = vendor_id; | |
623 | event->host_no = shost->host_no; | |
624 | event->event_datalen = data_len; /* bytes */ | |
625 | event->event_num = event_number; | |
626 | event->event_code = FCH_EVT_VENDOR_UNIQUE; | |
627 | memcpy(&event->event_data, data_buf, data_len); | |
628 | ||
ff491a73 PNA |
629 | nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS, |
630 | GFP_KERNEL); | |
84314fd4 JS |
631 | return; |
632 | ||
633 | send_vendor_fail_skb: | |
634 | kfree_skb(skb); | |
635 | send_vendor_fail: | |
636 | printk(KERN_WARNING | |
637 | "%s: Dropped Event : host %d vendor_unique - err %d\n", | |
cadbd4a5 | 638 | __func__, shost->host_no, err); |
84314fd4 JS |
639 | return; |
640 | } | |
641 | EXPORT_SYMBOL(fc_host_post_vendor_event); | |
642 | ||
643 | ||
1da177e4 LT |
644 | |
645 | static __init int fc_transport_init(void) | |
646 | { | |
84314fd4 JS |
647 | int error; |
648 | ||
649 | atomic_set(&fc_event_seq, 0); | |
650 | ||
651 | error = transport_class_register(&fc_host_class); | |
a53eb5e0 JS |
652 | if (error) |
653 | return error; | |
654 | error = transport_class_register(&fc_vport_class); | |
1da177e4 | 655 | if (error) |
48de68a4 | 656 | goto unreg_host_class; |
1da177e4 LT |
657 | error = transport_class_register(&fc_rport_class); |
658 | if (error) | |
48de68a4 MC |
659 | goto unreg_vport_class; |
660 | error = transport_class_register(&fc_transport_class); | |
661 | if (error) | |
662 | goto unreg_rport_class; | |
663 | return 0; | |
664 | ||
665 | unreg_rport_class: | |
666 | transport_class_unregister(&fc_rport_class); | |
667 | unreg_vport_class: | |
668 | transport_class_unregister(&fc_vport_class); | |
669 | unreg_host_class: | |
670 | transport_class_unregister(&fc_host_class); | |
671 | return error; | |
1da177e4 LT |
672 | } |
673 | ||
674 | static void __exit fc_transport_exit(void) | |
675 | { | |
676 | transport_class_unregister(&fc_transport_class); | |
677 | transport_class_unregister(&fc_rport_class); | |
678 | transport_class_unregister(&fc_host_class); | |
a53eb5e0 | 679 | transport_class_unregister(&fc_vport_class); |
1da177e4 LT |
680 | } |
681 | ||
682 | /* | |
683 | * FC Remote Port Attribute Management | |
684 | */ | |
685 | ||
686 | #define fc_rport_show_function(field, format_string, sz, cast) \ | |
687 | static ssize_t \ | |
ee959b00 TJ |
688 | show_fc_rport_##field (struct device *dev, \ |
689 | struct device_attribute *attr, char *buf) \ | |
1da177e4 | 690 | { \ |
ee959b00 | 691 | struct fc_rport *rport = transport_class_to_rport(dev); \ |
1da177e4 LT |
692 | struct Scsi_Host *shost = rport_to_shost(rport); \ |
693 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
19a7b4ae JSEC |
694 | if ((i->f->get_rport_##field) && \ |
695 | !((rport->port_state == FC_PORTSTATE_BLOCKED) || \ | |
42e33148 | 696 | (rport->port_state == FC_PORTSTATE_DELETED) || \ |
19a7b4ae | 697 | (rport->port_state == FC_PORTSTATE_NOTPRESENT))) \ |
1da177e4 LT |
698 | i->f->get_rport_##field(rport); \ |
699 | return snprintf(buf, sz, format_string, cast rport->field); \ | |
700 | } | |
701 | ||
702 | #define fc_rport_store_function(field) \ | |
703 | static ssize_t \ | |
ee959b00 TJ |
704 | store_fc_rport_##field(struct device *dev, \ |
705 | struct device_attribute *attr, \ | |
706 | const char *buf, size_t count) \ | |
1da177e4 LT |
707 | { \ |
708 | int val; \ | |
ee959b00 | 709 | struct fc_rport *rport = transport_class_to_rport(dev); \ |
1da177e4 LT |
710 | struct Scsi_Host *shost = rport_to_shost(rport); \ |
711 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
0f29b966 | 712 | char *cp; \ |
19a7b4ae | 713 | if ((rport->port_state == FC_PORTSTATE_BLOCKED) || \ |
42e33148 | 714 | (rport->port_state == FC_PORTSTATE_DELETED) || \ |
19a7b4ae JSEC |
715 | (rport->port_state == FC_PORTSTATE_NOTPRESENT)) \ |
716 | return -EBUSY; \ | |
0f29b966 JS |
717 | val = simple_strtoul(buf, &cp, 0); \ |
718 | if (*cp && (*cp != '\n')) \ | |
719 | return -EINVAL; \ | |
1da177e4 LT |
720 | i->f->set_rport_##field(rport, val); \ |
721 | return count; \ | |
722 | } | |
723 | ||
724 | #define fc_rport_rd_attr(field, format_string, sz) \ | |
725 | fc_rport_show_function(field, format_string, sz, ) \ | |
ee959b00 | 726 | static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ |
1da177e4 LT |
727 | show_fc_rport_##field, NULL) |
728 | ||
729 | #define fc_rport_rd_attr_cast(field, format_string, sz, cast) \ | |
730 | fc_rport_show_function(field, format_string, sz, (cast)) \ | |
ee959b00 | 731 | static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ |
1da177e4 LT |
732 | show_fc_rport_##field, NULL) |
733 | ||
734 | #define fc_rport_rw_attr(field, format_string, sz) \ | |
735 | fc_rport_show_function(field, format_string, sz, ) \ | |
736 | fc_rport_store_function(field) \ | |
ee959b00 | 737 | static FC_DEVICE_ATTR(rport, field, S_IRUGO | S_IWUSR, \ |
1da177e4 LT |
738 | show_fc_rport_##field, \ |
739 | store_fc_rport_##field) | |
740 | ||
741 | ||
742 | #define fc_private_rport_show_function(field, format_string, sz, cast) \ | |
743 | static ssize_t \ | |
ee959b00 TJ |
744 | show_fc_rport_##field (struct device *dev, \ |
745 | struct device_attribute *attr, char *buf) \ | |
1da177e4 | 746 | { \ |
ee959b00 | 747 | struct fc_rport *rport = transport_class_to_rport(dev); \ |
1da177e4 LT |
748 | return snprintf(buf, sz, format_string, cast rport->field); \ |
749 | } | |
750 | ||
751 | #define fc_private_rport_rd_attr(field, format_string, sz) \ | |
752 | fc_private_rport_show_function(field, format_string, sz, ) \ | |
ee959b00 | 753 | static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ |
1da177e4 LT |
754 | show_fc_rport_##field, NULL) |
755 | ||
756 | #define fc_private_rport_rd_attr_cast(field, format_string, sz, cast) \ | |
757 | fc_private_rport_show_function(field, format_string, sz, (cast)) \ | |
ee959b00 | 758 | static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ |
1da177e4 LT |
759 | show_fc_rport_##field, NULL) |
760 | ||
761 | ||
762 | #define fc_private_rport_rd_enum_attr(title, maxlen) \ | |
763 | static ssize_t \ | |
ee959b00 TJ |
764 | show_fc_rport_##title (struct device *dev, \ |
765 | struct device_attribute *attr, char *buf) \ | |
1da177e4 | 766 | { \ |
ee959b00 | 767 | struct fc_rport *rport = transport_class_to_rport(dev); \ |
1da177e4 LT |
768 | const char *name; \ |
769 | name = get_fc_##title##_name(rport->title); \ | |
770 | if (!name) \ | |
771 | return -EINVAL; \ | |
772 | return snprintf(buf, maxlen, "%s\n", name); \ | |
773 | } \ | |
ee959b00 | 774 | static FC_DEVICE_ATTR(rport, title, S_IRUGO, \ |
1da177e4 LT |
775 | show_fc_rport_##title, NULL) |
776 | ||
777 | ||
778 | #define SETUP_RPORT_ATTRIBUTE_RD(field) \ | |
ee959b00 | 779 | i->private_rport_attrs[count] = device_attr_rport_##field; \ |
1da177e4 LT |
780 | i->private_rport_attrs[count].attr.mode = S_IRUGO; \ |
781 | i->private_rport_attrs[count].store = NULL; \ | |
782 | i->rport_attrs[count] = &i->private_rport_attrs[count]; \ | |
783 | if (i->f->show_rport_##field) \ | |
784 | count++ | |
785 | ||
786 | #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(field) \ | |
ee959b00 | 787 | i->private_rport_attrs[count] = device_attr_rport_##field; \ |
1da177e4 LT |
788 | i->private_rport_attrs[count].attr.mode = S_IRUGO; \ |
789 | i->private_rport_attrs[count].store = NULL; \ | |
790 | i->rport_attrs[count] = &i->private_rport_attrs[count]; \ | |
791 | count++ | |
792 | ||
793 | #define SETUP_RPORT_ATTRIBUTE_RW(field) \ | |
ee959b00 | 794 | i->private_rport_attrs[count] = device_attr_rport_##field; \ |
1da177e4 LT |
795 | if (!i->f->set_rport_##field) { \ |
796 | i->private_rport_attrs[count].attr.mode = S_IRUGO; \ | |
797 | i->private_rport_attrs[count].store = NULL; \ | |
798 | } \ | |
799 | i->rport_attrs[count] = &i->private_rport_attrs[count]; \ | |
800 | if (i->f->show_rport_##field) \ | |
801 | count++ | |
802 | ||
0f29b966 JS |
803 | #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(field) \ |
804 | { \ | |
ee959b00 | 805 | i->private_rport_attrs[count] = device_attr_rport_##field; \ |
0f29b966 JS |
806 | i->rport_attrs[count] = &i->private_rport_attrs[count]; \ |
807 | count++; \ | |
808 | } | |
809 | ||
1da177e4 LT |
810 | |
811 | /* The FC Transport Remote Port Attributes: */ | |
812 | ||
813 | /* Fixed Remote Port Attributes */ | |
814 | ||
815 | fc_private_rport_rd_attr(maxframe_size, "%u bytes\n", 20); | |
816 | ||
817 | static ssize_t | |
ee959b00 TJ |
818 | show_fc_rport_supported_classes (struct device *dev, |
819 | struct device_attribute *attr, char *buf) | |
1da177e4 | 820 | { |
ee959b00 | 821 | struct fc_rport *rport = transport_class_to_rport(dev); |
1da177e4 LT |
822 | if (rport->supported_classes == FC_COS_UNSPECIFIED) |
823 | return snprintf(buf, 20, "unspecified\n"); | |
824 | return get_fc_cos_names(rport->supported_classes, buf); | |
825 | } | |
ee959b00 | 826 | static FC_DEVICE_ATTR(rport, supported_classes, S_IRUGO, |
1da177e4 LT |
827 | show_fc_rport_supported_classes, NULL); |
828 | ||
829 | /* Dynamic Remote Port Attributes */ | |
830 | ||
19a7b4ae JSEC |
831 | /* |
832 | * dev_loss_tmo attribute | |
833 | */ | |
43ca910a MC |
834 | static int fc_str_to_dev_loss(const char *buf, unsigned long *val) |
835 | { | |
836 | char *cp; | |
837 | ||
838 | *val = simple_strtoul(buf, &cp, 0); | |
839 | if ((*cp && (*cp != '\n')) || (*val < 0)) | |
840 | return -EINVAL; | |
841 | /* | |
842 | * Check for overflow; dev_loss_tmo is u32 | |
843 | */ | |
844 | if (*val > UINT_MAX) | |
845 | return -EINVAL; | |
846 | ||
847 | return 0; | |
848 | } | |
849 | ||
850 | static int fc_rport_set_dev_loss_tmo(struct fc_rport *rport, | |
851 | unsigned long val) | |
19a7b4ae | 852 | { |
19a7b4ae JSEC |
853 | struct Scsi_Host *shost = rport_to_shost(rport); |
854 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
43ca910a | 855 | |
19a7b4ae | 856 | if ((rport->port_state == FC_PORTSTATE_BLOCKED) || |
42e33148 | 857 | (rport->port_state == FC_PORTSTATE_DELETED) || |
19a7b4ae JSEC |
858 | (rport->port_state == FC_PORTSTATE_NOTPRESENT)) |
859 | return -EBUSY; | |
36dd288f HR |
860 | /* |
861 | * Check for overflow; dev_loss_tmo is u32 | |
862 | */ | |
863 | if (val > UINT_MAX) | |
864 | return -EINVAL; | |
865 | ||
f2818663 HR |
866 | /* |
867 | * If fast_io_fail is off we have to cap | |
868 | * dev_loss_tmo at SCSI_DEVICE_BLOCK_MAX_TIMEOUT | |
869 | */ | |
870 | if (rport->fast_io_fail_tmo == -1 && | |
871 | val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT) | |
872 | return -EINVAL; | |
873 | ||
19a7b4ae | 874 | i->f->set_rport_dev_loss_tmo(rport, val); |
43ca910a MC |
875 | return 0; |
876 | } | |
877 | ||
878 | fc_rport_show_function(dev_loss_tmo, "%d\n", 20, ) | |
879 | static ssize_t | |
880 | store_fc_rport_dev_loss_tmo(struct device *dev, struct device_attribute *attr, | |
881 | const char *buf, size_t count) | |
882 | { | |
883 | struct fc_rport *rport = transport_class_to_rport(dev); | |
884 | unsigned long val; | |
885 | int rc; | |
886 | ||
887 | rc = fc_str_to_dev_loss(buf, &val); | |
888 | if (rc) | |
889 | return rc; | |
890 | ||
891 | rc = fc_rport_set_dev_loss_tmo(rport, val); | |
892 | if (rc) | |
893 | return rc; | |
19a7b4ae JSEC |
894 | return count; |
895 | } | |
ee959b00 | 896 | static FC_DEVICE_ATTR(rport, dev_loss_tmo, S_IRUGO | S_IWUSR, |
19a7b4ae | 897 | show_fc_rport_dev_loss_tmo, store_fc_rport_dev_loss_tmo); |
1da177e4 LT |
898 | |
899 | ||
900 | /* Private Remote Port Attributes */ | |
901 | ||
902 | fc_private_rport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); | |
903 | fc_private_rport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); | |
904 | fc_private_rport_rd_attr(port_id, "0x%06x\n", 20); | |
905 | ||
906 | static ssize_t | |
ee959b00 TJ |
907 | show_fc_rport_roles (struct device *dev, struct device_attribute *attr, |
908 | char *buf) | |
1da177e4 | 909 | { |
ee959b00 | 910 | struct fc_rport *rport = transport_class_to_rport(dev); |
1da177e4 LT |
911 | |
912 | /* identify any roles that are port_id specific */ | |
913 | if ((rport->port_id != -1) && | |
914 | (rport->port_id & FC_WELLKNOWN_PORTID_MASK) == | |
915 | FC_WELLKNOWN_PORTID_MASK) { | |
916 | switch (rport->port_id & FC_WELLKNOWN_ROLE_MASK) { | |
917 | case FC_FPORT_PORTID: | |
918 | return snprintf(buf, 30, "Fabric Port\n"); | |
919 | case FC_FABCTLR_PORTID: | |
920 | return snprintf(buf, 30, "Fabric Controller\n"); | |
921 | case FC_DIRSRVR_PORTID: | |
922 | return snprintf(buf, 30, "Directory Server\n"); | |
923 | case FC_TIMESRVR_PORTID: | |
924 | return snprintf(buf, 30, "Time Server\n"); | |
925 | case FC_MGMTSRVR_PORTID: | |
926 | return snprintf(buf, 30, "Management Server\n"); | |
927 | default: | |
928 | return snprintf(buf, 30, "Unknown Fabric Entity\n"); | |
929 | } | |
930 | } else { | |
a53eb5e0 | 931 | if (rport->roles == FC_PORT_ROLE_UNKNOWN) |
1da177e4 | 932 | return snprintf(buf, 20, "unknown\n"); |
a53eb5e0 | 933 | return get_fc_port_roles_names(rport->roles, buf); |
1da177e4 LT |
934 | } |
935 | } | |
ee959b00 | 936 | static FC_DEVICE_ATTR(rport, roles, S_IRUGO, |
1da177e4 LT |
937 | show_fc_rport_roles, NULL); |
938 | ||
939 | fc_private_rport_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN); | |
940 | fc_private_rport_rd_attr(scsi_target_id, "%d\n", 20); | |
941 | ||
0f29b966 JS |
942 | /* |
943 | * fast_io_fail_tmo attribute | |
944 | */ | |
945 | static ssize_t | |
ee959b00 TJ |
946 | show_fc_rport_fast_io_fail_tmo (struct device *dev, |
947 | struct device_attribute *attr, char *buf) | |
0f29b966 | 948 | { |
ee959b00 | 949 | struct fc_rport *rport = transport_class_to_rport(dev); |
0f29b966 JS |
950 | |
951 | if (rport->fast_io_fail_tmo == -1) | |
952 | return snprintf(buf, 5, "off\n"); | |
953 | return snprintf(buf, 20, "%d\n", rport->fast_io_fail_tmo); | |
954 | } | |
955 | ||
956 | static ssize_t | |
ee959b00 TJ |
957 | store_fc_rport_fast_io_fail_tmo(struct device *dev, |
958 | struct device_attribute *attr, const char *buf, | |
959 | size_t count) | |
0f29b966 JS |
960 | { |
961 | int val; | |
962 | char *cp; | |
ee959b00 | 963 | struct fc_rport *rport = transport_class_to_rport(dev); |
0f29b966 JS |
964 | |
965 | if ((rport->port_state == FC_PORTSTATE_BLOCKED) || | |
966 | (rport->port_state == FC_PORTSTATE_DELETED) || | |
967 | (rport->port_state == FC_PORTSTATE_NOTPRESENT)) | |
968 | return -EBUSY; | |
969 | if (strncmp(buf, "off", 3) == 0) | |
970 | rport->fast_io_fail_tmo = -1; | |
971 | else { | |
972 | val = simple_strtoul(buf, &cp, 0); | |
f2818663 HR |
973 | if ((*cp && (*cp != '\n')) || (val < 0)) |
974 | return -EINVAL; | |
975 | /* | |
976 | * Cap fast_io_fail by dev_loss_tmo or | |
977 | * SCSI_DEVICE_BLOCK_MAX_TIMEOUT. | |
978 | */ | |
979 | if ((val >= rport->dev_loss_tmo) || | |
980 | (val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT)) | |
0f29b966 | 981 | return -EINVAL; |
f2818663 | 982 | |
0f29b966 JS |
983 | rport->fast_io_fail_tmo = val; |
984 | } | |
985 | return count; | |
986 | } | |
ee959b00 | 987 | static FC_DEVICE_ATTR(rport, fast_io_fail_tmo, S_IRUGO | S_IWUSR, |
0f29b966 | 988 | show_fc_rport_fast_io_fail_tmo, store_fc_rport_fast_io_fail_tmo); |
1da177e4 LT |
989 | |
990 | ||
991 | /* | |
992 | * FC SCSI Target Attribute Management | |
993 | */ | |
994 | ||
995 | /* | |
996 | * Note: in the target show function we recognize when the remote | |
732bee7a | 997 | * port is in the hierarchy and do not allow the driver to get |
1da177e4 LT |
998 | * involved in sysfs functions. The driver only gets involved if |
999 | * it's the "old" style that doesn't use rports. | |
1000 | */ | |
1001 | #define fc_starget_show_function(field, format_string, sz, cast) \ | |
1002 | static ssize_t \ | |
ee959b00 TJ |
1003 | show_fc_starget_##field (struct device *dev, \ |
1004 | struct device_attribute *attr, char *buf) \ | |
1da177e4 | 1005 | { \ |
ee959b00 | 1006 | struct scsi_target *starget = transport_class_to_starget(dev); \ |
1da177e4 LT |
1007 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \ |
1008 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
1009 | struct fc_rport *rport = starget_to_rport(starget); \ | |
1010 | if (rport) \ | |
1011 | fc_starget_##field(starget) = rport->field; \ | |
1012 | else if (i->f->get_starget_##field) \ | |
1013 | i->f->get_starget_##field(starget); \ | |
1014 | return snprintf(buf, sz, format_string, \ | |
1015 | cast fc_starget_##field(starget)); \ | |
1016 | } | |
1017 | ||
1018 | #define fc_starget_rd_attr(field, format_string, sz) \ | |
1019 | fc_starget_show_function(field, format_string, sz, ) \ | |
ee959b00 | 1020 | static FC_DEVICE_ATTR(starget, field, S_IRUGO, \ |
1da177e4 LT |
1021 | show_fc_starget_##field, NULL) |
1022 | ||
1023 | #define fc_starget_rd_attr_cast(field, format_string, sz, cast) \ | |
1024 | fc_starget_show_function(field, format_string, sz, (cast)) \ | |
ee959b00 | 1025 | static FC_DEVICE_ATTR(starget, field, S_IRUGO, \ |
1da177e4 LT |
1026 | show_fc_starget_##field, NULL) |
1027 | ||
1028 | #define SETUP_STARGET_ATTRIBUTE_RD(field) \ | |
ee959b00 | 1029 | i->private_starget_attrs[count] = device_attr_starget_##field; \ |
1da177e4 LT |
1030 | i->private_starget_attrs[count].attr.mode = S_IRUGO; \ |
1031 | i->private_starget_attrs[count].store = NULL; \ | |
1032 | i->starget_attrs[count] = &i->private_starget_attrs[count]; \ | |
1033 | if (i->f->show_starget_##field) \ | |
1034 | count++ | |
1035 | ||
1036 | #define SETUP_STARGET_ATTRIBUTE_RW(field) \ | |
ee959b00 | 1037 | i->private_starget_attrs[count] = device_attr_starget_##field; \ |
1da177e4 LT |
1038 | if (!i->f->set_starget_##field) { \ |
1039 | i->private_starget_attrs[count].attr.mode = S_IRUGO; \ | |
1040 | i->private_starget_attrs[count].store = NULL; \ | |
1041 | } \ | |
1042 | i->starget_attrs[count] = &i->private_starget_attrs[count]; \ | |
1043 | if (i->f->show_starget_##field) \ | |
1044 | count++ | |
1045 | ||
1046 | /* The FC Transport SCSI Target Attributes: */ | |
1047 | fc_starget_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); | |
1048 | fc_starget_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); | |
1049 | fc_starget_rd_attr(port_id, "0x%06x\n", 20); | |
1050 | ||
1051 | ||
a53eb5e0 JS |
1052 | /* |
1053 | * FC Virtual Port Attribute Management | |
1054 | */ | |
1055 | ||
1056 | #define fc_vport_show_function(field, format_string, sz, cast) \ | |
1057 | static ssize_t \ | |
ee959b00 TJ |
1058 | show_fc_vport_##field (struct device *dev, \ |
1059 | struct device_attribute *attr, char *buf) \ | |
a53eb5e0 | 1060 | { \ |
ee959b00 | 1061 | struct fc_vport *vport = transport_class_to_vport(dev); \ |
a53eb5e0 JS |
1062 | struct Scsi_Host *shost = vport_to_shost(vport); \ |
1063 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
1064 | if ((i->f->get_vport_##field) && \ | |
1065 | !(vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))) \ | |
1066 | i->f->get_vport_##field(vport); \ | |
1067 | return snprintf(buf, sz, format_string, cast vport->field); \ | |
1068 | } | |
1069 | ||
1070 | #define fc_vport_store_function(field) \ | |
1071 | static ssize_t \ | |
ee959b00 TJ |
1072 | store_fc_vport_##field(struct device *dev, \ |
1073 | struct device_attribute *attr, \ | |
1074 | const char *buf, size_t count) \ | |
a53eb5e0 JS |
1075 | { \ |
1076 | int val; \ | |
ee959b00 | 1077 | struct fc_vport *vport = transport_class_to_vport(dev); \ |
a53eb5e0 JS |
1078 | struct Scsi_Host *shost = vport_to_shost(vport); \ |
1079 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
1080 | char *cp; \ | |
1081 | if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \ | |
1082 | return -EBUSY; \ | |
1083 | val = simple_strtoul(buf, &cp, 0); \ | |
1084 | if (*cp && (*cp != '\n')) \ | |
1085 | return -EINVAL; \ | |
1086 | i->f->set_vport_##field(vport, val); \ | |
1087 | return count; \ | |
1088 | } | |
1089 | ||
1090 | #define fc_vport_store_str_function(field, slen) \ | |
1091 | static ssize_t \ | |
ee959b00 TJ |
1092 | store_fc_vport_##field(struct device *dev, \ |
1093 | struct device_attribute *attr, \ | |
1094 | const char *buf, size_t count) \ | |
a53eb5e0 | 1095 | { \ |
ee959b00 | 1096 | struct fc_vport *vport = transport_class_to_vport(dev); \ |
a53eb5e0 JS |
1097 | struct Scsi_Host *shost = vport_to_shost(vport); \ |
1098 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
1099 | unsigned int cnt=count; \ | |
1100 | \ | |
1101 | /* count may include a LF at end of string */ \ | |
1102 | if (buf[cnt-1] == '\n') \ | |
1103 | cnt--; \ | |
1104 | if (cnt > ((slen) - 1)) \ | |
1105 | return -EINVAL; \ | |
1106 | memcpy(vport->field, buf, cnt); \ | |
1107 | i->f->set_vport_##field(vport); \ | |
1108 | return count; \ | |
1109 | } | |
1110 | ||
1111 | #define fc_vport_rd_attr(field, format_string, sz) \ | |
1112 | fc_vport_show_function(field, format_string, sz, ) \ | |
ee959b00 | 1113 | static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ |
a53eb5e0 JS |
1114 | show_fc_vport_##field, NULL) |
1115 | ||
1116 | #define fc_vport_rd_attr_cast(field, format_string, sz, cast) \ | |
1117 | fc_vport_show_function(field, format_string, sz, (cast)) \ | |
ee959b00 | 1118 | static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ |
a53eb5e0 JS |
1119 | show_fc_vport_##field, NULL) |
1120 | ||
1121 | #define fc_vport_rw_attr(field, format_string, sz) \ | |
1122 | fc_vport_show_function(field, format_string, sz, ) \ | |
1123 | fc_vport_store_function(field) \ | |
ee959b00 | 1124 | static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \ |
a53eb5e0 JS |
1125 | show_fc_vport_##field, \ |
1126 | store_fc_vport_##field) | |
1127 | ||
1128 | #define fc_private_vport_show_function(field, format_string, sz, cast) \ | |
1129 | static ssize_t \ | |
ee959b00 TJ |
1130 | show_fc_vport_##field (struct device *dev, \ |
1131 | struct device_attribute *attr, char *buf) \ | |
a53eb5e0 | 1132 | { \ |
ee959b00 | 1133 | struct fc_vport *vport = transport_class_to_vport(dev); \ |
a53eb5e0 JS |
1134 | return snprintf(buf, sz, format_string, cast vport->field); \ |
1135 | } | |
1136 | ||
1137 | #define fc_private_vport_store_u32_function(field) \ | |
1138 | static ssize_t \ | |
ee959b00 TJ |
1139 | store_fc_vport_##field(struct device *dev, \ |
1140 | struct device_attribute *attr, \ | |
1141 | const char *buf, size_t count) \ | |
a53eb5e0 JS |
1142 | { \ |
1143 | u32 val; \ | |
ee959b00 | 1144 | struct fc_vport *vport = transport_class_to_vport(dev); \ |
a53eb5e0 JS |
1145 | char *cp; \ |
1146 | if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \ | |
1147 | return -EBUSY; \ | |
1148 | val = simple_strtoul(buf, &cp, 0); \ | |
1149 | if (*cp && (*cp != '\n')) \ | |
1150 | return -EINVAL; \ | |
1151 | vport->field = val; \ | |
1152 | return count; \ | |
1153 | } | |
1154 | ||
1155 | ||
1156 | #define fc_private_vport_rd_attr(field, format_string, sz) \ | |
1157 | fc_private_vport_show_function(field, format_string, sz, ) \ | |
ee959b00 | 1158 | static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ |
a53eb5e0 JS |
1159 | show_fc_vport_##field, NULL) |
1160 | ||
1161 | #define fc_private_vport_rd_attr_cast(field, format_string, sz, cast) \ | |
1162 | fc_private_vport_show_function(field, format_string, sz, (cast)) \ | |
ee959b00 | 1163 | static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ |
a53eb5e0 JS |
1164 | show_fc_vport_##field, NULL) |
1165 | ||
1166 | #define fc_private_vport_rw_u32_attr(field, format_string, sz) \ | |
1167 | fc_private_vport_show_function(field, format_string, sz, ) \ | |
1168 | fc_private_vport_store_u32_function(field) \ | |
ee959b00 | 1169 | static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \ |
a53eb5e0 JS |
1170 | show_fc_vport_##field, \ |
1171 | store_fc_vport_##field) | |
1172 | ||
1173 | ||
1174 | #define fc_private_vport_rd_enum_attr(title, maxlen) \ | |
1175 | static ssize_t \ | |
ee959b00 TJ |
1176 | show_fc_vport_##title (struct device *dev, \ |
1177 | struct device_attribute *attr, \ | |
1178 | char *buf) \ | |
a53eb5e0 | 1179 | { \ |
ee959b00 | 1180 | struct fc_vport *vport = transport_class_to_vport(dev); \ |
a53eb5e0 JS |
1181 | const char *name; \ |
1182 | name = get_fc_##title##_name(vport->title); \ | |
1183 | if (!name) \ | |
1184 | return -EINVAL; \ | |
1185 | return snprintf(buf, maxlen, "%s\n", name); \ | |
1186 | } \ | |
ee959b00 | 1187 | static FC_DEVICE_ATTR(vport, title, S_IRUGO, \ |
a53eb5e0 JS |
1188 | show_fc_vport_##title, NULL) |
1189 | ||
1190 | ||
1191 | #define SETUP_VPORT_ATTRIBUTE_RD(field) \ | |
ee959b00 | 1192 | i->private_vport_attrs[count] = device_attr_vport_##field; \ |
a53eb5e0 JS |
1193 | i->private_vport_attrs[count].attr.mode = S_IRUGO; \ |
1194 | i->private_vport_attrs[count].store = NULL; \ | |
1195 | i->vport_attrs[count] = &i->private_vport_attrs[count]; \ | |
1196 | if (i->f->get_##field) \ | |
1197 | count++ | |
1198 | /* NOTE: Above MACRO differs: checks function not show bit */ | |
1199 | ||
1200 | #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(field) \ | |
ee959b00 | 1201 | i->private_vport_attrs[count] = device_attr_vport_##field; \ |
a53eb5e0 JS |
1202 | i->private_vport_attrs[count].attr.mode = S_IRUGO; \ |
1203 | i->private_vport_attrs[count].store = NULL; \ | |
1204 | i->vport_attrs[count] = &i->private_vport_attrs[count]; \ | |
1205 | count++ | |
1206 | ||
1207 | #define SETUP_VPORT_ATTRIBUTE_WR(field) \ | |
ee959b00 | 1208 | i->private_vport_attrs[count] = device_attr_vport_##field; \ |
a53eb5e0 JS |
1209 | i->vport_attrs[count] = &i->private_vport_attrs[count]; \ |
1210 | if (i->f->field) \ | |
1211 | count++ | |
1212 | /* NOTE: Above MACRO differs: checks function */ | |
1213 | ||
1214 | #define SETUP_VPORT_ATTRIBUTE_RW(field) \ | |
ee959b00 | 1215 | i->private_vport_attrs[count] = device_attr_vport_##field; \ |
a53eb5e0 JS |
1216 | if (!i->f->set_vport_##field) { \ |
1217 | i->private_vport_attrs[count].attr.mode = S_IRUGO; \ | |
1218 | i->private_vport_attrs[count].store = NULL; \ | |
1219 | } \ | |
1220 | i->vport_attrs[count] = &i->private_vport_attrs[count]; \ | |
1221 | count++ | |
1222 | /* NOTE: Above MACRO differs: does not check show bit */ | |
1223 | ||
1224 | #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RW(field) \ | |
1225 | { \ | |
ee959b00 | 1226 | i->private_vport_attrs[count] = device_attr_vport_##field; \ |
a53eb5e0 JS |
1227 | i->vport_attrs[count] = &i->private_vport_attrs[count]; \ |
1228 | count++; \ | |
1229 | } | |
1230 | ||
1231 | ||
1232 | /* The FC Transport Virtual Port Attributes: */ | |
1233 | ||
1234 | /* Fixed Virtual Port Attributes */ | |
1235 | ||
1236 | /* Dynamic Virtual Port Attributes */ | |
1237 | ||
1238 | /* Private Virtual Port Attributes */ | |
1239 | ||
1240 | fc_private_vport_rd_enum_attr(vport_state, FC_VPORTSTATE_MAX_NAMELEN); | |
1241 | fc_private_vport_rd_enum_attr(vport_last_state, FC_VPORTSTATE_MAX_NAMELEN); | |
1242 | fc_private_vport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); | |
1243 | fc_private_vport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); | |
1244 | ||
1245 | static ssize_t | |
ee959b00 TJ |
1246 | show_fc_vport_roles (struct device *dev, struct device_attribute *attr, |
1247 | char *buf) | |
a53eb5e0 | 1248 | { |
ee959b00 | 1249 | struct fc_vport *vport = transport_class_to_vport(dev); |
a53eb5e0 JS |
1250 | |
1251 | if (vport->roles == FC_PORT_ROLE_UNKNOWN) | |
1252 | return snprintf(buf, 20, "unknown\n"); | |
1253 | return get_fc_port_roles_names(vport->roles, buf); | |
1254 | } | |
ee959b00 | 1255 | static FC_DEVICE_ATTR(vport, roles, S_IRUGO, show_fc_vport_roles, NULL); |
a53eb5e0 JS |
1256 | |
1257 | fc_private_vport_rd_enum_attr(vport_type, FC_PORTTYPE_MAX_NAMELEN); | |
1258 | ||
1259 | fc_private_vport_show_function(symbolic_name, "%s\n", | |
1260 | FC_VPORT_SYMBOLIC_NAMELEN + 1, ) | |
1261 | fc_vport_store_str_function(symbolic_name, FC_VPORT_SYMBOLIC_NAMELEN) | |
ee959b00 | 1262 | static FC_DEVICE_ATTR(vport, symbolic_name, S_IRUGO | S_IWUSR, |
a53eb5e0 JS |
1263 | show_fc_vport_symbolic_name, store_fc_vport_symbolic_name); |
1264 | ||
1265 | static ssize_t | |
ee959b00 TJ |
1266 | store_fc_vport_delete(struct device *dev, struct device_attribute *attr, |
1267 | const char *buf, size_t count) | |
a53eb5e0 | 1268 | { |
ee959b00 | 1269 | struct fc_vport *vport = transport_class_to_vport(dev); |
9ef3e4a4 | 1270 | struct Scsi_Host *shost = vport_to_shost(vport); |
0d9dc7c8 GR |
1271 | unsigned long flags; |
1272 | ||
1273 | spin_lock_irqsave(shost->host_lock, flags); | |
1274 | if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) { | |
1275 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1276 | return -EBUSY; | |
1277 | } | |
1278 | vport->flags |= FC_VPORT_DELETING; | |
1279 | spin_unlock_irqrestore(shost->host_lock, flags); | |
a53eb5e0 | 1280 | |
9ef3e4a4 | 1281 | fc_queue_work(shost, &vport->vport_delete_work); |
a53eb5e0 JS |
1282 | return count; |
1283 | } | |
ee959b00 | 1284 | static FC_DEVICE_ATTR(vport, vport_delete, S_IWUSR, |
a53eb5e0 JS |
1285 | NULL, store_fc_vport_delete); |
1286 | ||
1287 | ||
1288 | /* | |
1289 | * Enable/Disable vport | |
1290 | * Write "1" to disable, write "0" to enable | |
1291 | */ | |
1292 | static ssize_t | |
ee959b00 TJ |
1293 | store_fc_vport_disable(struct device *dev, struct device_attribute *attr, |
1294 | const char *buf, | |
a53eb5e0 JS |
1295 | size_t count) |
1296 | { | |
ee959b00 | 1297 | struct fc_vport *vport = transport_class_to_vport(dev); |
a53eb5e0 JS |
1298 | struct Scsi_Host *shost = vport_to_shost(vport); |
1299 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
1300 | int stat; | |
1301 | ||
1302 | if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) | |
1303 | return -EBUSY; | |
1304 | ||
1305 | if (*buf == '0') { | |
1306 | if (vport->vport_state != FC_VPORT_DISABLED) | |
1307 | return -EALREADY; | |
1308 | } else if (*buf == '1') { | |
1309 | if (vport->vport_state == FC_VPORT_DISABLED) | |
1310 | return -EALREADY; | |
1311 | } else | |
1312 | return -EINVAL; | |
1313 | ||
1314 | stat = i->f->vport_disable(vport, ((*buf == '0') ? false : true)); | |
1315 | return stat ? stat : count; | |
1316 | } | |
ee959b00 | 1317 | static FC_DEVICE_ATTR(vport, vport_disable, S_IWUSR, |
a53eb5e0 JS |
1318 | NULL, store_fc_vport_disable); |
1319 | ||
1320 | ||
1da177e4 LT |
1321 | /* |
1322 | * Host Attribute Management | |
1323 | */ | |
1324 | ||
1325 | #define fc_host_show_function(field, format_string, sz, cast) \ | |
1326 | static ssize_t \ | |
ee959b00 TJ |
1327 | show_fc_host_##field (struct device *dev, \ |
1328 | struct device_attribute *attr, char *buf) \ | |
1da177e4 | 1329 | { \ |
ee959b00 | 1330 | struct Scsi_Host *shost = transport_class_to_shost(dev); \ |
1da177e4 LT |
1331 | struct fc_internal *i = to_fc_internal(shost->transportt); \ |
1332 | if (i->f->get_host_##field) \ | |
1333 | i->f->get_host_##field(shost); \ | |
1334 | return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \ | |
1335 | } | |
1336 | ||
1337 | #define fc_host_store_function(field) \ | |
1338 | static ssize_t \ | |
ee959b00 TJ |
1339 | store_fc_host_##field(struct device *dev, \ |
1340 | struct device_attribute *attr, \ | |
1341 | const char *buf, size_t count) \ | |
1da177e4 LT |
1342 | { \ |
1343 | int val; \ | |
ee959b00 | 1344 | struct Scsi_Host *shost = transport_class_to_shost(dev); \ |
1da177e4 | 1345 | struct fc_internal *i = to_fc_internal(shost->transportt); \ |
0f29b966 | 1346 | char *cp; \ |
1da177e4 | 1347 | \ |
0f29b966 JS |
1348 | val = simple_strtoul(buf, &cp, 0); \ |
1349 | if (*cp && (*cp != '\n')) \ | |
1350 | return -EINVAL; \ | |
1da177e4 LT |
1351 | i->f->set_host_##field(shost, val); \ |
1352 | return count; \ | |
1353 | } | |
1354 | ||
b8d08210 JS |
1355 | #define fc_host_store_str_function(field, slen) \ |
1356 | static ssize_t \ | |
ee959b00 TJ |
1357 | store_fc_host_##field(struct device *dev, \ |
1358 | struct device_attribute *attr, \ | |
1359 | const char *buf, size_t count) \ | |
b8d08210 | 1360 | { \ |
ee959b00 | 1361 | struct Scsi_Host *shost = transport_class_to_shost(dev); \ |
b8d08210 JS |
1362 | struct fc_internal *i = to_fc_internal(shost->transportt); \ |
1363 | unsigned int cnt=count; \ | |
1364 | \ | |
1365 | /* count may include a LF at end of string */ \ | |
1366 | if (buf[cnt-1] == '\n') \ | |
1367 | cnt--; \ | |
1368 | if (cnt > ((slen) - 1)) \ | |
1369 | return -EINVAL; \ | |
1370 | memcpy(fc_host_##field(shost), buf, cnt); \ | |
1371 | i->f->set_host_##field(shost); \ | |
1372 | return count; \ | |
1373 | } | |
1374 | ||
1da177e4 LT |
1375 | #define fc_host_rd_attr(field, format_string, sz) \ |
1376 | fc_host_show_function(field, format_string, sz, ) \ | |
ee959b00 | 1377 | static FC_DEVICE_ATTR(host, field, S_IRUGO, \ |
1da177e4 LT |
1378 | show_fc_host_##field, NULL) |
1379 | ||
1380 | #define fc_host_rd_attr_cast(field, format_string, sz, cast) \ | |
1381 | fc_host_show_function(field, format_string, sz, (cast)) \ | |
ee959b00 | 1382 | static FC_DEVICE_ATTR(host, field, S_IRUGO, \ |
1da177e4 LT |
1383 | show_fc_host_##field, NULL) |
1384 | ||
1385 | #define fc_host_rw_attr(field, format_string, sz) \ | |
1386 | fc_host_show_function(field, format_string, sz, ) \ | |
1387 | fc_host_store_function(field) \ | |
ee959b00 | 1388 | static FC_DEVICE_ATTR(host, field, S_IRUGO | S_IWUSR, \ |
1da177e4 LT |
1389 | show_fc_host_##field, \ |
1390 | store_fc_host_##field) | |
1391 | ||
1392 | #define fc_host_rd_enum_attr(title, maxlen) \ | |
1393 | static ssize_t \ | |
ee959b00 TJ |
1394 | show_fc_host_##title (struct device *dev, \ |
1395 | struct device_attribute *attr, char *buf) \ | |
1da177e4 | 1396 | { \ |
ee959b00 | 1397 | struct Scsi_Host *shost = transport_class_to_shost(dev); \ |
1da177e4 LT |
1398 | struct fc_internal *i = to_fc_internal(shost->transportt); \ |
1399 | const char *name; \ | |
1400 | if (i->f->get_host_##title) \ | |
1401 | i->f->get_host_##title(shost); \ | |
1402 | name = get_fc_##title##_name(fc_host_##title(shost)); \ | |
1403 | if (!name) \ | |
1404 | return -EINVAL; \ | |
1405 | return snprintf(buf, maxlen, "%s\n", name); \ | |
1406 | } \ | |
ee959b00 | 1407 | static FC_DEVICE_ATTR(host, title, S_IRUGO, show_fc_host_##title, NULL) |
1da177e4 LT |
1408 | |
1409 | #define SETUP_HOST_ATTRIBUTE_RD(field) \ | |
ee959b00 | 1410 | i->private_host_attrs[count] = device_attr_host_##field; \ |
1da177e4 LT |
1411 | i->private_host_attrs[count].attr.mode = S_IRUGO; \ |
1412 | i->private_host_attrs[count].store = NULL; \ | |
1413 | i->host_attrs[count] = &i->private_host_attrs[count]; \ | |
1414 | if (i->f->show_host_##field) \ | |
1415 | count++ | |
1416 | ||
a53eb5e0 | 1417 | #define SETUP_HOST_ATTRIBUTE_RD_NS(field) \ |
ee959b00 | 1418 | i->private_host_attrs[count] = device_attr_host_##field; \ |
a53eb5e0 JS |
1419 | i->private_host_attrs[count].attr.mode = S_IRUGO; \ |
1420 | i->private_host_attrs[count].store = NULL; \ | |
1421 | i->host_attrs[count] = &i->private_host_attrs[count]; \ | |
1422 | count++ | |
1423 | ||
1da177e4 | 1424 | #define SETUP_HOST_ATTRIBUTE_RW(field) \ |
ee959b00 | 1425 | i->private_host_attrs[count] = device_attr_host_##field; \ |
1da177e4 LT |
1426 | if (!i->f->set_host_##field) { \ |
1427 | i->private_host_attrs[count].attr.mode = S_IRUGO; \ | |
1428 | i->private_host_attrs[count].store = NULL; \ | |
1429 | } \ | |
1430 | i->host_attrs[count] = &i->private_host_attrs[count]; \ | |
1431 | if (i->f->show_host_##field) \ | |
1432 | count++ | |
1433 | ||
1434 | ||
1435 | #define fc_private_host_show_function(field, format_string, sz, cast) \ | |
1436 | static ssize_t \ | |
ee959b00 TJ |
1437 | show_fc_host_##field (struct device *dev, \ |
1438 | struct device_attribute *attr, char *buf) \ | |
1da177e4 | 1439 | { \ |
ee959b00 | 1440 | struct Scsi_Host *shost = transport_class_to_shost(dev); \ |
1da177e4 LT |
1441 | return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \ |
1442 | } | |
1443 | ||
1444 | #define fc_private_host_rd_attr(field, format_string, sz) \ | |
1445 | fc_private_host_show_function(field, format_string, sz, ) \ | |
ee959b00 | 1446 | static FC_DEVICE_ATTR(host, field, S_IRUGO, \ |
1da177e4 LT |
1447 | show_fc_host_##field, NULL) |
1448 | ||
1449 | #define fc_private_host_rd_attr_cast(field, format_string, sz, cast) \ | |
1450 | fc_private_host_show_function(field, format_string, sz, (cast)) \ | |
ee959b00 | 1451 | static FC_DEVICE_ATTR(host, field, S_IRUGO, \ |
1da177e4 LT |
1452 | show_fc_host_##field, NULL) |
1453 | ||
1454 | #define SETUP_PRIVATE_HOST_ATTRIBUTE_RD(field) \ | |
ee959b00 | 1455 | i->private_host_attrs[count] = device_attr_host_##field; \ |
1da177e4 LT |
1456 | i->private_host_attrs[count].attr.mode = S_IRUGO; \ |
1457 | i->private_host_attrs[count].store = NULL; \ | |
1458 | i->host_attrs[count] = &i->private_host_attrs[count]; \ | |
1459 | count++ | |
1460 | ||
1461 | #define SETUP_PRIVATE_HOST_ATTRIBUTE_RW(field) \ | |
91ca7b01 | 1462 | { \ |
ee959b00 | 1463 | i->private_host_attrs[count] = device_attr_host_##field; \ |
1da177e4 | 1464 | i->host_attrs[count] = &i->private_host_attrs[count]; \ |
91ca7b01 AV |
1465 | count++; \ |
1466 | } | |
1da177e4 LT |
1467 | |
1468 | ||
1469 | /* Fixed Host Attributes */ | |
1470 | ||
1471 | static ssize_t | |
ee959b00 TJ |
1472 | show_fc_host_supported_classes (struct device *dev, |
1473 | struct device_attribute *attr, char *buf) | |
1da177e4 | 1474 | { |
ee959b00 | 1475 | struct Scsi_Host *shost = transport_class_to_shost(dev); |
1da177e4 LT |
1476 | |
1477 | if (fc_host_supported_classes(shost) == FC_COS_UNSPECIFIED) | |
1478 | return snprintf(buf, 20, "unspecified\n"); | |
1479 | ||
1480 | return get_fc_cos_names(fc_host_supported_classes(shost), buf); | |
1481 | } | |
ee959b00 | 1482 | static FC_DEVICE_ATTR(host, supported_classes, S_IRUGO, |
1da177e4 LT |
1483 | show_fc_host_supported_classes, NULL); |
1484 | ||
1485 | static ssize_t | |
ee959b00 TJ |
1486 | show_fc_host_supported_fc4s (struct device *dev, |
1487 | struct device_attribute *attr, char *buf) | |
1da177e4 | 1488 | { |
ee959b00 | 1489 | struct Scsi_Host *shost = transport_class_to_shost(dev); |
1da177e4 LT |
1490 | return (ssize_t)show_fc_fc4s(buf, fc_host_supported_fc4s(shost)); |
1491 | } | |
ee959b00 | 1492 | static FC_DEVICE_ATTR(host, supported_fc4s, S_IRUGO, |
1da177e4 LT |
1493 | show_fc_host_supported_fc4s, NULL); |
1494 | ||
1495 | static ssize_t | |
ee959b00 TJ |
1496 | show_fc_host_supported_speeds (struct device *dev, |
1497 | struct device_attribute *attr, char *buf) | |
1da177e4 | 1498 | { |
ee959b00 | 1499 | struct Scsi_Host *shost = transport_class_to_shost(dev); |
1da177e4 LT |
1500 | |
1501 | if (fc_host_supported_speeds(shost) == FC_PORTSPEED_UNKNOWN) | |
1502 | return snprintf(buf, 20, "unknown\n"); | |
1503 | ||
1504 | return get_fc_port_speed_names(fc_host_supported_speeds(shost), buf); | |
1505 | } | |
ee959b00 | 1506 | static FC_DEVICE_ATTR(host, supported_speeds, S_IRUGO, |
1da177e4 LT |
1507 | show_fc_host_supported_speeds, NULL); |
1508 | ||
1509 | ||
1510 | fc_private_host_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); | |
1511 | fc_private_host_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); | |
6b7281d0 AH |
1512 | fc_private_host_rd_attr_cast(permanent_port_name, "0x%llx\n", 20, |
1513 | unsigned long long); | |
1da177e4 | 1514 | fc_private_host_rd_attr(maxframe_size, "%u bytes\n", 20); |
a53eb5e0 | 1515 | fc_private_host_rd_attr(max_npiv_vports, "%u\n", 20); |
1da177e4 LT |
1516 | fc_private_host_rd_attr(serial_number, "%s\n", (FC_SERIAL_NUMBER_SIZE +1)); |
1517 | ||
1518 | ||
1519 | /* Dynamic Host Attributes */ | |
1520 | ||
1521 | static ssize_t | |
ee959b00 TJ |
1522 | show_fc_host_active_fc4s (struct device *dev, |
1523 | struct device_attribute *attr, char *buf) | |
1da177e4 | 1524 | { |
ee959b00 | 1525 | struct Scsi_Host *shost = transport_class_to_shost(dev); |
1da177e4 LT |
1526 | struct fc_internal *i = to_fc_internal(shost->transportt); |
1527 | ||
1528 | if (i->f->get_host_active_fc4s) | |
1529 | i->f->get_host_active_fc4s(shost); | |
1530 | ||
1531 | return (ssize_t)show_fc_fc4s(buf, fc_host_active_fc4s(shost)); | |
1532 | } | |
ee959b00 | 1533 | static FC_DEVICE_ATTR(host, active_fc4s, S_IRUGO, |
1da177e4 LT |
1534 | show_fc_host_active_fc4s, NULL); |
1535 | ||
1536 | static ssize_t | |
ee959b00 TJ |
1537 | show_fc_host_speed (struct device *dev, |
1538 | struct device_attribute *attr, char *buf) | |
1da177e4 | 1539 | { |
ee959b00 | 1540 | struct Scsi_Host *shost = transport_class_to_shost(dev); |
1da177e4 LT |
1541 | struct fc_internal *i = to_fc_internal(shost->transportt); |
1542 | ||
1543 | if (i->f->get_host_speed) | |
1544 | i->f->get_host_speed(shost); | |
1545 | ||
1546 | if (fc_host_speed(shost) == FC_PORTSPEED_UNKNOWN) | |
1547 | return snprintf(buf, 20, "unknown\n"); | |
1548 | ||
1549 | return get_fc_port_speed_names(fc_host_speed(shost), buf); | |
1550 | } | |
ee959b00 | 1551 | static FC_DEVICE_ATTR(host, speed, S_IRUGO, |
1da177e4 LT |
1552 | show_fc_host_speed, NULL); |
1553 | ||
1554 | ||
1555 | fc_host_rd_attr(port_id, "0x%06x\n", 20); | |
1556 | fc_host_rd_enum_attr(port_type, FC_PORTTYPE_MAX_NAMELEN); | |
1557 | fc_host_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN); | |
1558 | fc_host_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long); | |
016131b8 | 1559 | fc_host_rd_attr(symbolic_name, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1); |
1da177e4 | 1560 | |
b8d08210 JS |
1561 | fc_private_host_show_function(system_hostname, "%s\n", |
1562 | FC_SYMBOLIC_NAME_SIZE + 1, ) | |
1563 | fc_host_store_str_function(system_hostname, FC_SYMBOLIC_NAME_SIZE) | |
ee959b00 | 1564 | static FC_DEVICE_ATTR(host, system_hostname, S_IRUGO | S_IWUSR, |
b8d08210 JS |
1565 | show_fc_host_system_hostname, store_fc_host_system_hostname); |
1566 | ||
1da177e4 LT |
1567 | |
1568 | /* Private Host Attributes */ | |
1569 | ||
1570 | static ssize_t | |
ee959b00 TJ |
1571 | show_fc_private_host_tgtid_bind_type(struct device *dev, |
1572 | struct device_attribute *attr, char *buf) | |
1da177e4 | 1573 | { |
ee959b00 | 1574 | struct Scsi_Host *shost = transport_class_to_shost(dev); |
1da177e4 LT |
1575 | const char *name; |
1576 | ||
1577 | name = get_fc_tgtid_bind_type_name(fc_host_tgtid_bind_type(shost)); | |
1578 | if (!name) | |
1579 | return -EINVAL; | |
1580 | return snprintf(buf, FC_BINDTYPE_MAX_NAMELEN, "%s\n", name); | |
1581 | } | |
1582 | ||
d16794f6 JSEC |
1583 | #define get_list_head_entry(pos, head, member) \ |
1584 | pos = list_entry((head)->next, typeof(*pos), member) | |
1585 | ||
1da177e4 | 1586 | static ssize_t |
ee959b00 TJ |
1587 | store_fc_private_host_tgtid_bind_type(struct device *dev, |
1588 | struct device_attribute *attr, const char *buf, size_t count) | |
1da177e4 | 1589 | { |
ee959b00 | 1590 | struct Scsi_Host *shost = transport_class_to_shost(dev); |
d16794f6 | 1591 | struct fc_rport *rport; |
1da177e4 LT |
1592 | enum fc_tgtid_binding_type val; |
1593 | unsigned long flags; | |
1594 | ||
1595 | if (get_fc_tgtid_bind_type_match(buf, &val)) | |
1596 | return -EINVAL; | |
1597 | ||
1598 | /* if changing bind type, purge all unused consistent bindings */ | |
1599 | if (val != fc_host_tgtid_bind_type(shost)) { | |
1600 | spin_lock_irqsave(shost->host_lock, flags); | |
d16794f6 JSEC |
1601 | while (!list_empty(&fc_host_rport_bindings(shost))) { |
1602 | get_list_head_entry(rport, | |
1603 | &fc_host_rport_bindings(shost), peers); | |
aedf3497 JS |
1604 | list_del(&rport->peers); |
1605 | rport->port_state = FC_PORTSTATE_DELETED; | |
1606 | fc_queue_work(shost, &rport->rport_delete_work); | |
d16794f6 | 1607 | } |
1da177e4 LT |
1608 | spin_unlock_irqrestore(shost->host_lock, flags); |
1609 | } | |
1610 | ||
1611 | fc_host_tgtid_bind_type(shost) = val; | |
1612 | return count; | |
1613 | } | |
1614 | ||
ee959b00 | 1615 | static FC_DEVICE_ATTR(host, tgtid_bind_type, S_IRUGO | S_IWUSR, |
1da177e4 LT |
1616 | show_fc_private_host_tgtid_bind_type, |
1617 | store_fc_private_host_tgtid_bind_type); | |
1618 | ||
91ca7b01 | 1619 | static ssize_t |
ee959b00 TJ |
1620 | store_fc_private_host_issue_lip(struct device *dev, |
1621 | struct device_attribute *attr, const char *buf, size_t count) | |
91ca7b01 | 1622 | { |
ee959b00 | 1623 | struct Scsi_Host *shost = transport_class_to_shost(dev); |
91ca7b01 AV |
1624 | struct fc_internal *i = to_fc_internal(shost->transportt); |
1625 | int ret; | |
1626 | ||
1627 | /* ignore any data value written to the attribute */ | |
1628 | if (i->f->issue_fc_host_lip) { | |
1629 | ret = i->f->issue_fc_host_lip(shost); | |
1630 | return ret ? ret: count; | |
1631 | } | |
1632 | ||
1633 | return -ENOENT; | |
1634 | } | |
1635 | ||
ee959b00 | 1636 | static FC_DEVICE_ATTR(host, issue_lip, S_IWUSR, NULL, |
91ca7b01 AV |
1637 | store_fc_private_host_issue_lip); |
1638 | ||
43ca910a MC |
1639 | static ssize_t |
1640 | store_fc_private_host_dev_loss_tmo(struct device *dev, | |
1641 | struct device_attribute *attr, | |
1642 | const char *buf, size_t count) | |
1643 | { | |
1644 | struct Scsi_Host *shost = transport_class_to_shost(dev); | |
1645 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); | |
1646 | struct fc_rport *rport; | |
1647 | unsigned long val, flags; | |
1648 | int rc; | |
1649 | ||
1650 | rc = fc_str_to_dev_loss(buf, &val); | |
1651 | if (rc) | |
1652 | return rc; | |
1653 | ||
1654 | fc_host_dev_loss_tmo(shost) = val; | |
1655 | spin_lock_irqsave(shost->host_lock, flags); | |
1656 | list_for_each_entry(rport, &fc_host->rports, peers) | |
1657 | fc_rport_set_dev_loss_tmo(rport, val); | |
1658 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1659 | return count; | |
1660 | } | |
a53eb5e0 | 1661 | |
43ca910a MC |
1662 | fc_private_host_show_function(dev_loss_tmo, "%d\n", 20, ); |
1663 | static FC_DEVICE_ATTR(host, dev_loss_tmo, S_IRUGO | S_IWUSR, | |
1664 | show_fc_host_dev_loss_tmo, | |
1665 | store_fc_private_host_dev_loss_tmo); | |
1666 | ||
1667 | fc_private_host_rd_attr(npiv_vports_inuse, "%u\n", 20); | |
a53eb5e0 | 1668 | |
1da177e4 LT |
1669 | /* |
1670 | * Host Statistics Management | |
1671 | */ | |
1672 | ||
1673 | /* Show a given an attribute in the statistics group */ | |
1674 | static ssize_t | |
ee959b00 | 1675 | fc_stat_show(const struct device *dev, char *buf, unsigned long offset) |
1da177e4 | 1676 | { |
ee959b00 | 1677 | struct Scsi_Host *shost = transport_class_to_shost(dev); |
1da177e4 LT |
1678 | struct fc_internal *i = to_fc_internal(shost->transportt); |
1679 | struct fc_host_statistics *stats; | |
1680 | ssize_t ret = -ENOENT; | |
1681 | ||
1682 | if (offset > sizeof(struct fc_host_statistics) || | |
1683 | offset % sizeof(u64) != 0) | |
1684 | WARN_ON(1); | |
1685 | ||
1686 | if (i->f->get_fc_host_stats) { | |
1687 | stats = (i->f->get_fc_host_stats)(shost); | |
1688 | if (stats) | |
1689 | ret = snprintf(buf, 20, "0x%llx\n", | |
1690 | (unsigned long long)*(u64 *)(((u8 *) stats) + offset)); | |
1691 | } | |
1692 | return ret; | |
1693 | } | |
1694 | ||
1695 | ||
1696 | /* generate a read-only statistics attribute */ | |
1697 | #define fc_host_statistic(name) \ | |
ee959b00 TJ |
1698 | static ssize_t show_fcstat_##name(struct device *cd, \ |
1699 | struct device_attribute *attr, \ | |
1700 | char *buf) \ | |
1da177e4 LT |
1701 | { \ |
1702 | return fc_stat_show(cd, buf, \ | |
1703 | offsetof(struct fc_host_statistics, name)); \ | |
1704 | } \ | |
ee959b00 | 1705 | static FC_DEVICE_ATTR(host, name, S_IRUGO, show_fcstat_##name, NULL) |
1da177e4 LT |
1706 | |
1707 | fc_host_statistic(seconds_since_last_reset); | |
1708 | fc_host_statistic(tx_frames); | |
1709 | fc_host_statistic(tx_words); | |
1710 | fc_host_statistic(rx_frames); | |
1711 | fc_host_statistic(rx_words); | |
1712 | fc_host_statistic(lip_count); | |
1713 | fc_host_statistic(nos_count); | |
1714 | fc_host_statistic(error_frames); | |
1715 | fc_host_statistic(dumped_frames); | |
1716 | fc_host_statistic(link_failure_count); | |
1717 | fc_host_statistic(loss_of_sync_count); | |
1718 | fc_host_statistic(loss_of_signal_count); | |
1719 | fc_host_statistic(prim_seq_protocol_err_count); | |
1720 | fc_host_statistic(invalid_tx_word_count); | |
1721 | fc_host_statistic(invalid_crc_count); | |
1722 | fc_host_statistic(fcp_input_requests); | |
1723 | fc_host_statistic(fcp_output_requests); | |
1724 | fc_host_statistic(fcp_control_requests); | |
1725 | fc_host_statistic(fcp_input_megabytes); | |
1726 | fc_host_statistic(fcp_output_megabytes); | |
1727 | ||
1728 | static ssize_t | |
ee959b00 TJ |
1729 | fc_reset_statistics(struct device *dev, struct device_attribute *attr, |
1730 | const char *buf, size_t count) | |
1da177e4 | 1731 | { |
ee959b00 | 1732 | struct Scsi_Host *shost = transport_class_to_shost(dev); |
1da177e4 LT |
1733 | struct fc_internal *i = to_fc_internal(shost->transportt); |
1734 | ||
1735 | /* ignore any data value written to the attribute */ | |
1736 | if (i->f->reset_fc_host_stats) { | |
1737 | i->f->reset_fc_host_stats(shost); | |
1738 | return count; | |
1739 | } | |
1740 | ||
1741 | return -ENOENT; | |
1742 | } | |
ee959b00 | 1743 | static FC_DEVICE_ATTR(host, reset_statistics, S_IWUSR, NULL, |
1da177e4 LT |
1744 | fc_reset_statistics); |
1745 | ||
1da177e4 | 1746 | static struct attribute *fc_statistics_attrs[] = { |
ee959b00 TJ |
1747 | &device_attr_host_seconds_since_last_reset.attr, |
1748 | &device_attr_host_tx_frames.attr, | |
1749 | &device_attr_host_tx_words.attr, | |
1750 | &device_attr_host_rx_frames.attr, | |
1751 | &device_attr_host_rx_words.attr, | |
1752 | &device_attr_host_lip_count.attr, | |
1753 | &device_attr_host_nos_count.attr, | |
1754 | &device_attr_host_error_frames.attr, | |
1755 | &device_attr_host_dumped_frames.attr, | |
1756 | &device_attr_host_link_failure_count.attr, | |
1757 | &device_attr_host_loss_of_sync_count.attr, | |
1758 | &device_attr_host_loss_of_signal_count.attr, | |
1759 | &device_attr_host_prim_seq_protocol_err_count.attr, | |
1760 | &device_attr_host_invalid_tx_word_count.attr, | |
1761 | &device_attr_host_invalid_crc_count.attr, | |
1762 | &device_attr_host_fcp_input_requests.attr, | |
1763 | &device_attr_host_fcp_output_requests.attr, | |
1764 | &device_attr_host_fcp_control_requests.attr, | |
1765 | &device_attr_host_fcp_input_megabytes.attr, | |
1766 | &device_attr_host_fcp_output_megabytes.attr, | |
1767 | &device_attr_host_reset_statistics.attr, | |
1da177e4 LT |
1768 | NULL |
1769 | }; | |
1770 | ||
1771 | static struct attribute_group fc_statistics_group = { | |
1772 | .name = "statistics", | |
1773 | .attrs = fc_statistics_attrs, | |
1774 | }; | |
1775 | ||
a53eb5e0 JS |
1776 | |
1777 | /* Host Vport Attributes */ | |
1778 | ||
1779 | static int | |
1780 | fc_parse_wwn(const char *ns, u64 *nm) | |
1781 | { | |
1782 | unsigned int i, j; | |
1783 | u8 wwn[8]; | |
1784 | ||
1785 | memset(wwn, 0, sizeof(wwn)); | |
1786 | ||
1787 | /* Validate and store the new name */ | |
1788 | for (i=0, j=0; i < 16; i++) { | |
ecc30990 AS |
1789 | int value; |
1790 | ||
1791 | value = hex_to_bin(*ns++); | |
1792 | if (value >= 0) | |
1793 | j = (j << 4) | value; | |
a53eb5e0 JS |
1794 | else |
1795 | return -EINVAL; | |
1796 | if (i % 2) { | |
1797 | wwn[i/2] = j & 0xff; | |
1798 | j = 0; | |
1799 | } | |
1800 | } | |
1801 | ||
1802 | *nm = wwn_to_u64(wwn); | |
1803 | ||
1804 | return 0; | |
1805 | } | |
1806 | ||
1807 | ||
1808 | /* | |
1809 | * "Short-cut" sysfs variable to create a new vport on a FC Host. | |
1810 | * Input is a string of the form "<WWPN>:<WWNN>". Other attributes | |
1811 | * will default to a NPIV-based FCP_Initiator; The WWNs are specified | |
1812 | * as hex characters, and may *not* contain any prefixes (e.g. 0x, x, etc) | |
1813 | */ | |
1814 | static ssize_t | |
ee959b00 TJ |
1815 | store_fc_host_vport_create(struct device *dev, struct device_attribute *attr, |
1816 | const char *buf, size_t count) | |
a53eb5e0 | 1817 | { |
ee959b00 | 1818 | struct Scsi_Host *shost = transport_class_to_shost(dev); |
a53eb5e0 JS |
1819 | struct fc_vport_identifiers vid; |
1820 | struct fc_vport *vport; | |
1821 | unsigned int cnt=count; | |
1822 | int stat; | |
1823 | ||
1824 | memset(&vid, 0, sizeof(vid)); | |
1825 | ||
1826 | /* count may include a LF at end of string */ | |
1827 | if (buf[cnt-1] == '\n') | |
1828 | cnt--; | |
1829 | ||
1830 | /* validate we have enough characters for WWPN */ | |
1831 | if ((cnt != (16+1+16)) || (buf[16] != ':')) | |
1832 | return -EINVAL; | |
1833 | ||
1834 | stat = fc_parse_wwn(&buf[0], &vid.port_name); | |
1835 | if (stat) | |
1836 | return stat; | |
1837 | ||
1838 | stat = fc_parse_wwn(&buf[17], &vid.node_name); | |
1839 | if (stat) | |
1840 | return stat; | |
1841 | ||
1842 | vid.roles = FC_PORT_ROLE_FCP_INITIATOR; | |
1843 | vid.vport_type = FC_PORTTYPE_NPIV; | |
1844 | /* vid.symbolic_name is already zero/NULL's */ | |
1845 | vid.disable = false; /* always enabled */ | |
1846 | ||
1847 | /* we only allow support on Channel 0 !!! */ | |
a30c3f69 | 1848 | stat = fc_vport_setup(shost, 0, &shost->shost_gendev, &vid, &vport); |
a53eb5e0 JS |
1849 | return stat ? stat : count; |
1850 | } | |
ee959b00 | 1851 | static FC_DEVICE_ATTR(host, vport_create, S_IWUSR, NULL, |
a53eb5e0 JS |
1852 | store_fc_host_vport_create); |
1853 | ||
1854 | ||
1855 | /* | |
1856 | * "Short-cut" sysfs variable to delete a vport on a FC Host. | |
1857 | * Vport is identified by a string containing "<WWPN>:<WWNN>". | |
1858 | * The WWNs are specified as hex characters, and may *not* contain | |
1859 | * any prefixes (e.g. 0x, x, etc) | |
1860 | */ | |
1861 | static ssize_t | |
ee959b00 TJ |
1862 | store_fc_host_vport_delete(struct device *dev, struct device_attribute *attr, |
1863 | const char *buf, size_t count) | |
a53eb5e0 | 1864 | { |
ee959b00 | 1865 | struct Scsi_Host *shost = transport_class_to_shost(dev); |
a53eb5e0 JS |
1866 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
1867 | struct fc_vport *vport; | |
1868 | u64 wwpn, wwnn; | |
1869 | unsigned long flags; | |
1870 | unsigned int cnt=count; | |
1871 | int stat, match; | |
1872 | ||
1873 | /* count may include a LF at end of string */ | |
1874 | if (buf[cnt-1] == '\n') | |
1875 | cnt--; | |
1876 | ||
1877 | /* validate we have enough characters for WWPN */ | |
1878 | if ((cnt != (16+1+16)) || (buf[16] != ':')) | |
1879 | return -EINVAL; | |
1880 | ||
1881 | stat = fc_parse_wwn(&buf[0], &wwpn); | |
1882 | if (stat) | |
1883 | return stat; | |
1884 | ||
1885 | stat = fc_parse_wwn(&buf[17], &wwnn); | |
1886 | if (stat) | |
1887 | return stat; | |
1888 | ||
1889 | spin_lock_irqsave(shost->host_lock, flags); | |
1890 | match = 0; | |
1891 | /* we only allow support on Channel 0 !!! */ | |
1892 | list_for_each_entry(vport, &fc_host->vports, peers) { | |
1893 | if ((vport->channel == 0) && | |
1894 | (vport->port_name == wwpn) && (vport->node_name == wwnn)) { | |
0d9dc7c8 GR |
1895 | if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) |
1896 | break; | |
1897 | vport->flags |= FC_VPORT_DELETING; | |
a53eb5e0 JS |
1898 | match = 1; |
1899 | break; | |
1900 | } | |
1901 | } | |
1902 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1903 | ||
1904 | if (!match) | |
1905 | return -ENODEV; | |
1906 | ||
1907 | stat = fc_vport_terminate(vport); | |
1908 | return stat ? stat : count; | |
1909 | } | |
ee959b00 | 1910 | static FC_DEVICE_ATTR(host, vport_delete, S_IWUSR, NULL, |
a53eb5e0 JS |
1911 | store_fc_host_vport_delete); |
1912 | ||
1913 | ||
1da177e4 LT |
1914 | static int fc_host_match(struct attribute_container *cont, |
1915 | struct device *dev) | |
1916 | { | |
1917 | struct Scsi_Host *shost; | |
1918 | struct fc_internal *i; | |
1919 | ||
1920 | if (!scsi_is_host_device(dev)) | |
1921 | return 0; | |
1922 | ||
1923 | shost = dev_to_shost(dev); | |
1924 | if (!shost->transportt || shost->transportt->host_attrs.ac.class | |
1925 | != &fc_host_class.class) | |
1926 | return 0; | |
1927 | ||
1928 | i = to_fc_internal(shost->transportt); | |
1929 | ||
1930 | return &i->t.host_attrs.ac == cont; | |
1931 | } | |
1932 | ||
1933 | static int fc_target_match(struct attribute_container *cont, | |
1934 | struct device *dev) | |
1935 | { | |
1936 | struct Scsi_Host *shost; | |
1937 | struct fc_internal *i; | |
1938 | ||
1939 | if (!scsi_is_target_device(dev)) | |
1940 | return 0; | |
1941 | ||
1942 | shost = dev_to_shost(dev->parent); | |
1943 | if (!shost->transportt || shost->transportt->host_attrs.ac.class | |
1944 | != &fc_host_class.class) | |
1945 | return 0; | |
1946 | ||
1947 | i = to_fc_internal(shost->transportt); | |
1948 | ||
1949 | return &i->t.target_attrs.ac == cont; | |
1950 | } | |
1951 | ||
1952 | static void fc_rport_dev_release(struct device *dev) | |
1953 | { | |
1954 | struct fc_rport *rport = dev_to_rport(dev); | |
1955 | put_device(dev->parent); | |
1956 | kfree(rport); | |
1957 | } | |
1958 | ||
1959 | int scsi_is_fc_rport(const struct device *dev) | |
1960 | { | |
1961 | return dev->release == fc_rport_dev_release; | |
1962 | } | |
1963 | EXPORT_SYMBOL(scsi_is_fc_rport); | |
1964 | ||
1965 | static int fc_rport_match(struct attribute_container *cont, | |
1966 | struct device *dev) | |
1967 | { | |
1968 | struct Scsi_Host *shost; | |
1969 | struct fc_internal *i; | |
1970 | ||
1971 | if (!scsi_is_fc_rport(dev)) | |
1972 | return 0; | |
1973 | ||
1974 | shost = dev_to_shost(dev->parent); | |
1975 | if (!shost->transportt || shost->transportt->host_attrs.ac.class | |
1976 | != &fc_host_class.class) | |
1977 | return 0; | |
1978 | ||
1979 | i = to_fc_internal(shost->transportt); | |
1980 | ||
1981 | return &i->rport_attr_cont.ac == cont; | |
1982 | } | |
1983 | ||
5c44cd2a | 1984 | |
a53eb5e0 JS |
1985 | static void fc_vport_dev_release(struct device *dev) |
1986 | { | |
1987 | struct fc_vport *vport = dev_to_vport(dev); | |
1988 | put_device(dev->parent); /* release kobj parent */ | |
1989 | kfree(vport); | |
1990 | } | |
1991 | ||
1992 | int scsi_is_fc_vport(const struct device *dev) | |
1993 | { | |
1994 | return dev->release == fc_vport_dev_release; | |
1995 | } | |
1996 | EXPORT_SYMBOL(scsi_is_fc_vport); | |
1997 | ||
1998 | static int fc_vport_match(struct attribute_container *cont, | |
1999 | struct device *dev) | |
2000 | { | |
2001 | struct fc_vport *vport; | |
2002 | struct Scsi_Host *shost; | |
2003 | struct fc_internal *i; | |
2004 | ||
2005 | if (!scsi_is_fc_vport(dev)) | |
2006 | return 0; | |
2007 | vport = dev_to_vport(dev); | |
2008 | ||
2009 | shost = vport_to_shost(vport); | |
2010 | if (!shost->transportt || shost->transportt->host_attrs.ac.class | |
2011 | != &fc_host_class.class) | |
2012 | return 0; | |
2013 | ||
2014 | i = to_fc_internal(shost->transportt); | |
2015 | return &i->vport_attr_cont.ac == cont; | |
2016 | } | |
2017 | ||
2018 | ||
c829c394 JS |
2019 | /** |
2020 | * fc_timed_out - FC Transport I/O timeout intercept handler | |
c829c394 JS |
2021 | * @scmd: The SCSI command which timed out |
2022 | * | |
2023 | * This routine protects against error handlers getting invoked while a | |
2024 | * rport is in a blocked state, typically due to a temporarily loss of | |
2025 | * connectivity. If the error handlers are allowed to proceed, requests | |
2026 | * to abort i/o, reset the target, etc will likely fail as there is no way | |
2027 | * to communicate with the device to perform the requested function. These | |
2028 | * failures may result in the midlayer taking the device offline, requiring | |
2029 | * manual intervention to restore operation. | |
2030 | * | |
2031 | * This routine, called whenever an i/o times out, validates the state of | |
2032 | * the underlying rport. If the rport is blocked, it returns | |
2033 | * EH_RESET_TIMER, which will continue to reschedule the timeout. | |
2034 | * Eventually, either the device will return, or devloss_tmo will fire, | |
2035 | * and when the timeout then fires, it will be handled normally. | |
2036 | * If the rport is not blocked, normal error handling continues. | |
2037 | * | |
2038 | * Notes: | |
2039 | * This routine assumes no locks are held on entry. | |
eb44820c | 2040 | */ |
242f9dcb | 2041 | static enum blk_eh_timer_return |
c829c394 JS |
2042 | fc_timed_out(struct scsi_cmnd *scmd) |
2043 | { | |
2044 | struct fc_rport *rport = starget_to_rport(scsi_target(scmd->device)); | |
2045 | ||
2046 | if (rport->port_state == FC_PORTSTATE_BLOCKED) | |
242f9dcb | 2047 | return BLK_EH_RESET_TIMER; |
c829c394 | 2048 | |
242f9dcb | 2049 | return BLK_EH_NOT_HANDLED; |
c829c394 JS |
2050 | } |
2051 | ||
5c44cd2a | 2052 | /* |
bda23253 JS |
2053 | * Called by fc_user_scan to locate an rport on the shost that |
2054 | * matches the channel and target id, and invoke scsi_scan_target() | |
2055 | * on the rport. | |
5c44cd2a | 2056 | */ |
bda23253 JS |
2057 | static void |
2058 | fc_user_scan_tgt(struct Scsi_Host *shost, uint channel, uint id, uint lun) | |
5c44cd2a JSEC |
2059 | { |
2060 | struct fc_rport *rport; | |
bda23253 JS |
2061 | unsigned long flags; |
2062 | ||
2063 | spin_lock_irqsave(shost->host_lock, flags); | |
5c44cd2a | 2064 | |
e02f3f59 CH |
2065 | list_for_each_entry(rport, &fc_host_rports(shost), peers) { |
2066 | if (rport->scsi_target_id == -1) | |
2067 | continue; | |
5c44cd2a | 2068 | |
0d2fcd9f HR |
2069 | if (rport->port_state != FC_PORTSTATE_ONLINE) |
2070 | continue; | |
2071 | ||
bda23253 JS |
2072 | if ((channel == rport->channel) && |
2073 | (id == rport->scsi_target_id)) { | |
2074 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2075 | scsi_scan_target(&rport->dev, channel, id, lun, 1); | |
2076 | return; | |
e02f3f59 CH |
2077 | } |
2078 | } | |
2079 | ||
bda23253 JS |
2080 | spin_unlock_irqrestore(shost->host_lock, flags); |
2081 | } | |
2082 | ||
2083 | /* | |
2084 | * Called via sysfs scan routines. Necessary, as the FC transport | |
2085 | * wants to place all target objects below the rport object. So this | |
2086 | * routine must invoke the scsi_scan_target() routine with the rport | |
2087 | * object as the parent. | |
2088 | */ | |
2089 | static int | |
2090 | fc_user_scan(struct Scsi_Host *shost, uint channel, uint id, uint lun) | |
2091 | { | |
2092 | uint chlo, chhi; | |
2093 | uint tgtlo, tgthi; | |
2094 | ||
2095 | if (((channel != SCAN_WILD_CARD) && (channel > shost->max_channel)) || | |
2096 | ((id != SCAN_WILD_CARD) && (id >= shost->max_id)) || | |
2097 | ((lun != SCAN_WILD_CARD) && (lun > shost->max_lun))) | |
2098 | return -EINVAL; | |
2099 | ||
2100 | if (channel == SCAN_WILD_CARD) { | |
2101 | chlo = 0; | |
2102 | chhi = shost->max_channel + 1; | |
2103 | } else { | |
2104 | chlo = channel; | |
2105 | chhi = channel + 1; | |
2106 | } | |
2107 | ||
2108 | if (id == SCAN_WILD_CARD) { | |
2109 | tgtlo = 0; | |
2110 | tgthi = shost->max_id; | |
2111 | } else { | |
2112 | tgtlo = id; | |
2113 | tgthi = id + 1; | |
2114 | } | |
2115 | ||
2116 | for ( ; chlo < chhi; chlo++) | |
2117 | for ( ; tgtlo < tgthi; tgtlo++) | |
2118 | fc_user_scan_tgt(shost, chlo, tgtlo, lun); | |
2119 | ||
e02f3f59 | 2120 | return 0; |
5c44cd2a JSEC |
2121 | } |
2122 | ||
7525236d FT |
2123 | static int fc_tsk_mgmt_response(struct Scsi_Host *shost, u64 nexus, u64 tm_id, |
2124 | int result) | |
2125 | { | |
2126 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
2127 | return i->f->tsk_mgmt_response(shost, nexus, tm_id, result); | |
2128 | } | |
2129 | ||
2130 | static int fc_it_nexus_response(struct Scsi_Host *shost, u64 nexus, int result) | |
2131 | { | |
2132 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
2133 | return i->f->it_nexus_response(shost, nexus, result); | |
2134 | } | |
2135 | ||
1da177e4 LT |
2136 | struct scsi_transport_template * |
2137 | fc_attach_transport(struct fc_function_template *ft) | |
2138 | { | |
1da177e4 | 2139 | int count; |
24669f75 JS |
2140 | struct fc_internal *i = kzalloc(sizeof(struct fc_internal), |
2141 | GFP_KERNEL); | |
1da177e4 LT |
2142 | |
2143 | if (unlikely(!i)) | |
2144 | return NULL; | |
2145 | ||
1da177e4 LT |
2146 | i->t.target_attrs.ac.attrs = &i->starget_attrs[0]; |
2147 | i->t.target_attrs.ac.class = &fc_transport_class.class; | |
2148 | i->t.target_attrs.ac.match = fc_target_match; | |
2149 | i->t.target_size = sizeof(struct fc_starget_attrs); | |
2150 | transport_container_register(&i->t.target_attrs); | |
2151 | ||
2152 | i->t.host_attrs.ac.attrs = &i->host_attrs[0]; | |
2153 | i->t.host_attrs.ac.class = &fc_host_class.class; | |
2154 | i->t.host_attrs.ac.match = fc_host_match; | |
2155 | i->t.host_size = sizeof(struct fc_host_attrs); | |
2156 | if (ft->get_fc_host_stats) | |
2157 | i->t.host_attrs.statistics = &fc_statistics_group; | |
2158 | transport_container_register(&i->t.host_attrs); | |
2159 | ||
2160 | i->rport_attr_cont.ac.attrs = &i->rport_attrs[0]; | |
2161 | i->rport_attr_cont.ac.class = &fc_rport_class.class; | |
2162 | i->rport_attr_cont.ac.match = fc_rport_match; | |
2163 | transport_container_register(&i->rport_attr_cont); | |
2164 | ||
a53eb5e0 JS |
2165 | i->vport_attr_cont.ac.attrs = &i->vport_attrs[0]; |
2166 | i->vport_attr_cont.ac.class = &fc_vport_class.class; | |
2167 | i->vport_attr_cont.ac.match = fc_vport_match; | |
2168 | transport_container_register(&i->vport_attr_cont); | |
2169 | ||
1da177e4 LT |
2170 | i->f = ft; |
2171 | ||
2172 | /* Transport uses the shost workq for scsi scanning */ | |
2173 | i->t.create_work_queue = 1; | |
5c44cd2a | 2174 | |
c829c394 JS |
2175 | i->t.eh_timed_out = fc_timed_out; |
2176 | ||
e02f3f59 | 2177 | i->t.user_scan = fc_user_scan; |
9ef3e4a4 | 2178 | |
7525236d FT |
2179 | /* target-mode drivers' functions */ |
2180 | i->t.tsk_mgmt_response = fc_tsk_mgmt_response; | |
2181 | i->t.it_nexus_response = fc_it_nexus_response; | |
2182 | ||
1da177e4 LT |
2183 | /* |
2184 | * Setup SCSI Target Attributes. | |
2185 | */ | |
2186 | count = 0; | |
2187 | SETUP_STARGET_ATTRIBUTE_RD(node_name); | |
2188 | SETUP_STARGET_ATTRIBUTE_RD(port_name); | |
2189 | SETUP_STARGET_ATTRIBUTE_RD(port_id); | |
2190 | ||
2191 | BUG_ON(count > FC_STARGET_NUM_ATTRS); | |
2192 | ||
2193 | i->starget_attrs[count] = NULL; | |
2194 | ||
2195 | ||
2196 | /* | |
2197 | * Setup SCSI Host Attributes. | |
2198 | */ | |
2199 | count=0; | |
2200 | SETUP_HOST_ATTRIBUTE_RD(node_name); | |
2201 | SETUP_HOST_ATTRIBUTE_RD(port_name); | |
6b7281d0 | 2202 | SETUP_HOST_ATTRIBUTE_RD(permanent_port_name); |
1da177e4 LT |
2203 | SETUP_HOST_ATTRIBUTE_RD(supported_classes); |
2204 | SETUP_HOST_ATTRIBUTE_RD(supported_fc4s); | |
1da177e4 LT |
2205 | SETUP_HOST_ATTRIBUTE_RD(supported_speeds); |
2206 | SETUP_HOST_ATTRIBUTE_RD(maxframe_size); | |
a53eb5e0 JS |
2207 | if (ft->vport_create) { |
2208 | SETUP_HOST_ATTRIBUTE_RD_NS(max_npiv_vports); | |
2209 | SETUP_HOST_ATTRIBUTE_RD_NS(npiv_vports_inuse); | |
2210 | } | |
1da177e4 LT |
2211 | SETUP_HOST_ATTRIBUTE_RD(serial_number); |
2212 | ||
2213 | SETUP_HOST_ATTRIBUTE_RD(port_id); | |
2214 | SETUP_HOST_ATTRIBUTE_RD(port_type); | |
2215 | SETUP_HOST_ATTRIBUTE_RD(port_state); | |
2216 | SETUP_HOST_ATTRIBUTE_RD(active_fc4s); | |
2217 | SETUP_HOST_ATTRIBUTE_RD(speed); | |
2218 | SETUP_HOST_ATTRIBUTE_RD(fabric_name); | |
016131b8 | 2219 | SETUP_HOST_ATTRIBUTE_RD(symbolic_name); |
b8d08210 | 2220 | SETUP_HOST_ATTRIBUTE_RW(system_hostname); |
1da177e4 LT |
2221 | |
2222 | /* Transport-managed attributes */ | |
43ca910a | 2223 | SETUP_PRIVATE_HOST_ATTRIBUTE_RW(dev_loss_tmo); |
1da177e4 | 2224 | SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type); |
91ca7b01 AV |
2225 | if (ft->issue_fc_host_lip) |
2226 | SETUP_PRIVATE_HOST_ATTRIBUTE_RW(issue_lip); | |
a53eb5e0 JS |
2227 | if (ft->vport_create) |
2228 | SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_create); | |
2229 | if (ft->vport_delete) | |
2230 | SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_delete); | |
1da177e4 LT |
2231 | |
2232 | BUG_ON(count > FC_HOST_NUM_ATTRS); | |
2233 | ||
2234 | i->host_attrs[count] = NULL; | |
2235 | ||
2236 | /* | |
2237 | * Setup Remote Port Attributes. | |
2238 | */ | |
2239 | count=0; | |
2240 | SETUP_RPORT_ATTRIBUTE_RD(maxframe_size); | |
2241 | SETUP_RPORT_ATTRIBUTE_RD(supported_classes); | |
2242 | SETUP_RPORT_ATTRIBUTE_RW(dev_loss_tmo); | |
2243 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(node_name); | |
2244 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_name); | |
2245 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_id); | |
2246 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(roles); | |
2247 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_state); | |
2248 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(scsi_target_id); | |
fff9d40c | 2249 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(fast_io_fail_tmo); |
1da177e4 LT |
2250 | |
2251 | BUG_ON(count > FC_RPORT_NUM_ATTRS); | |
2252 | ||
2253 | i->rport_attrs[count] = NULL; | |
2254 | ||
a53eb5e0 JS |
2255 | /* |
2256 | * Setup Virtual Port Attributes. | |
2257 | */ | |
2258 | count=0; | |
2259 | SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_state); | |
2260 | SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_last_state); | |
2261 | SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(node_name); | |
2262 | SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(port_name); | |
2263 | SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(roles); | |
2264 | SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_type); | |
2265 | SETUP_VPORT_ATTRIBUTE_RW(symbolic_name); | |
2266 | SETUP_VPORT_ATTRIBUTE_WR(vport_delete); | |
2267 | SETUP_VPORT_ATTRIBUTE_WR(vport_disable); | |
2268 | ||
2269 | BUG_ON(count > FC_VPORT_NUM_ATTRS); | |
2270 | ||
2271 | i->vport_attrs[count] = NULL; | |
2272 | ||
1da177e4 LT |
2273 | return &i->t; |
2274 | } | |
2275 | EXPORT_SYMBOL(fc_attach_transport); | |
2276 | ||
2277 | void fc_release_transport(struct scsi_transport_template *t) | |
2278 | { | |
2279 | struct fc_internal *i = to_fc_internal(t); | |
2280 | ||
2281 | transport_container_unregister(&i->t.target_attrs); | |
2282 | transport_container_unregister(&i->t.host_attrs); | |
2283 | transport_container_unregister(&i->rport_attr_cont); | |
a53eb5e0 | 2284 | transport_container_unregister(&i->vport_attr_cont); |
1da177e4 LT |
2285 | |
2286 | kfree(i); | |
2287 | } | |
2288 | EXPORT_SYMBOL(fc_release_transport); | |
2289 | ||
aedf3497 JS |
2290 | /** |
2291 | * fc_queue_work - Queue work to the fc_host workqueue. | |
2292 | * @shost: Pointer to Scsi_Host bound to fc_host. | |
2293 | * @work: Work to queue for execution. | |
2294 | * | |
2295 | * Return value: | |
a0785edf JS |
2296 | * 1 - work queued for execution |
2297 | * 0 - work is already queued | |
2298 | * -EINVAL - work queue doesn't exist | |
eb44820c | 2299 | */ |
aedf3497 JS |
2300 | static int |
2301 | fc_queue_work(struct Scsi_Host *shost, struct work_struct *work) | |
2302 | { | |
2303 | if (unlikely(!fc_host_work_q(shost))) { | |
2304 | printk(KERN_ERR | |
2305 | "ERROR: FC host '%s' attempted to queue work, " | |
2306 | "when no workqueue created.\n", shost->hostt->name); | |
2307 | dump_stack(); | |
2308 | ||
2309 | return -EINVAL; | |
2310 | } | |
2311 | ||
2312 | return queue_work(fc_host_work_q(shost), work); | |
2313 | } | |
2314 | ||
2315 | /** | |
2316 | * fc_flush_work - Flush a fc_host's workqueue. | |
2317 | * @shost: Pointer to Scsi_Host bound to fc_host. | |
eb44820c | 2318 | */ |
aedf3497 JS |
2319 | static void |
2320 | fc_flush_work(struct Scsi_Host *shost) | |
2321 | { | |
2322 | if (!fc_host_work_q(shost)) { | |
2323 | printk(KERN_ERR | |
2324 | "ERROR: FC host '%s' attempted to flush work, " | |
2325 | "when no workqueue created.\n", shost->hostt->name); | |
2326 | dump_stack(); | |
2327 | return; | |
2328 | } | |
2329 | ||
2330 | flush_workqueue(fc_host_work_q(shost)); | |
2331 | } | |
2332 | ||
2333 | /** | |
2334 | * fc_queue_devloss_work - Schedule work for the fc_host devloss workqueue. | |
2335 | * @shost: Pointer to Scsi_Host bound to fc_host. | |
2336 | * @work: Work to queue for execution. | |
2337 | * @delay: jiffies to delay the work queuing | |
2338 | * | |
2339 | * Return value: | |
0f29b966 | 2340 | * 1 on success / 0 already queued / < 0 for error |
eb44820c | 2341 | */ |
aedf3497 | 2342 | static int |
c4028958 | 2343 | fc_queue_devloss_work(struct Scsi_Host *shost, struct delayed_work *work, |
aedf3497 JS |
2344 | unsigned long delay) |
2345 | { | |
2346 | if (unlikely(!fc_host_devloss_work_q(shost))) { | |
2347 | printk(KERN_ERR | |
2348 | "ERROR: FC host '%s' attempted to queue work, " | |
2349 | "when no workqueue created.\n", shost->hostt->name); | |
2350 | dump_stack(); | |
2351 | ||
2352 | return -EINVAL; | |
2353 | } | |
2354 | ||
2355 | return queue_delayed_work(fc_host_devloss_work_q(shost), work, delay); | |
2356 | } | |
2357 | ||
2358 | /** | |
2359 | * fc_flush_devloss - Flush a fc_host's devloss workqueue. | |
2360 | * @shost: Pointer to Scsi_Host bound to fc_host. | |
eb44820c | 2361 | */ |
aedf3497 JS |
2362 | static void |
2363 | fc_flush_devloss(struct Scsi_Host *shost) | |
2364 | { | |
2365 | if (!fc_host_devloss_work_q(shost)) { | |
2366 | printk(KERN_ERR | |
2367 | "ERROR: FC host '%s' attempted to flush work, " | |
2368 | "when no workqueue created.\n", shost->hostt->name); | |
2369 | dump_stack(); | |
2370 | return; | |
2371 | } | |
2372 | ||
2373 | flush_workqueue(fc_host_devloss_work_q(shost)); | |
2374 | } | |
2375 | ||
1da177e4 LT |
2376 | |
2377 | /** | |
eb44820c RL |
2378 | * fc_remove_host - called to terminate any fc_transport-related elements for a scsi host. |
2379 | * @shost: Which &Scsi_Host | |
1da177e4 | 2380 | * |
25985edc | 2381 | * This routine is expected to be called immediately preceding the |
1da177e4 LT |
2382 | * a driver's call to scsi_remove_host(). |
2383 | * | |
2384 | * WARNING: A driver utilizing the fc_transport, which fails to call | |
eb44820c | 2385 | * this routine prior to scsi_remove_host(), will leave dangling |
1da177e4 LT |
2386 | * objects in /sys/class/fc_remote_ports. Access to any of these |
2387 | * objects can result in a system crash !!! | |
2388 | * | |
2389 | * Notes: | |
2390 | * This routine assumes no locks are held on entry. | |
eb44820c | 2391 | */ |
1da177e4 LT |
2392 | void |
2393 | fc_remove_host(struct Scsi_Host *shost) | |
2394 | { | |
a53eb5e0 JS |
2395 | struct fc_vport *vport = NULL, *next_vport = NULL; |
2396 | struct fc_rport *rport = NULL, *next_rport = NULL; | |
aedf3497 JS |
2397 | struct workqueue_struct *work_q; |
2398 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); | |
a53eb5e0 | 2399 | unsigned long flags; |
a53eb5e0 JS |
2400 | |
2401 | spin_lock_irqsave(shost->host_lock, flags); | |
2402 | ||
2403 | /* Remove any vports */ | |
9ef3e4a4 JS |
2404 | list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers) |
2405 | fc_queue_work(shost, &vport->vport_delete_work); | |
1da177e4 LT |
2406 | |
2407 | /* Remove any remote ports */ | |
2408 | list_for_each_entry_safe(rport, next_rport, | |
aedf3497 JS |
2409 | &fc_host->rports, peers) { |
2410 | list_del(&rport->peers); | |
2411 | rport->port_state = FC_PORTSTATE_DELETED; | |
2412 | fc_queue_work(shost, &rport->rport_delete_work); | |
2413 | } | |
2414 | ||
1da177e4 | 2415 | list_for_each_entry_safe(rport, next_rport, |
aedf3497 JS |
2416 | &fc_host->rport_bindings, peers) { |
2417 | list_del(&rport->peers); | |
2418 | rport->port_state = FC_PORTSTATE_DELETED; | |
2419 | fc_queue_work(shost, &rport->rport_delete_work); | |
2420 | } | |
2421 | ||
a53eb5e0 JS |
2422 | spin_unlock_irqrestore(shost->host_lock, flags); |
2423 | ||
aedf3497 JS |
2424 | /* flush all scan work items */ |
2425 | scsi_flush_work(shost); | |
2426 | ||
2427 | /* flush all stgt delete, and rport delete work items, then kill it */ | |
2428 | if (fc_host->work_q) { | |
2429 | work_q = fc_host->work_q; | |
2430 | fc_host->work_q = NULL; | |
2431 | destroy_workqueue(work_q); | |
2432 | } | |
2433 | ||
2434 | /* flush all devloss work items, then kill it */ | |
2435 | if (fc_host->devloss_work_q) { | |
2436 | work_q = fc_host->devloss_work_q; | |
2437 | fc_host->devloss_work_q = NULL; | |
2438 | destroy_workqueue(work_q); | |
2439 | } | |
1da177e4 LT |
2440 | } |
2441 | EXPORT_SYMBOL(fc_remove_host); | |
2442 | ||
fff9d40c MC |
2443 | static void fc_terminate_rport_io(struct fc_rport *rport) |
2444 | { | |
2445 | struct Scsi_Host *shost = rport_to_shost(rport); | |
2446 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
2447 | ||
2448 | /* Involve the LLDD if possible to terminate all io on the rport. */ | |
2449 | if (i->f->terminate_rport_io) | |
2450 | i->f->terminate_rport_io(rport); | |
2451 | ||
2452 | /* | |
2453 | * must unblock to flush queued IO. The caller will have set | |
2454 | * the port_state or flags, so that fc_remote_port_chkready will | |
2455 | * fail IO. | |
2456 | */ | |
2457 | scsi_target_unblock(&rport->dev); | |
2458 | } | |
aedf3497 JS |
2459 | |
2460 | /** | |
25985edc | 2461 | * fc_starget_delete - called to delete the scsi descendants of an rport |
c4028958 | 2462 | * @work: remote port to be operated on. |
eb44820c RL |
2463 | * |
2464 | * Deletes target and all sdevs. | |
2465 | */ | |
19a7b4ae | 2466 | static void |
c4028958 | 2467 | fc_starget_delete(struct work_struct *work) |
19a7b4ae | 2468 | { |
c4028958 DH |
2469 | struct fc_rport *rport = |
2470 | container_of(work, struct fc_rport, stgt_delete_work); | |
19a7b4ae | 2471 | |
fff9d40c | 2472 | fc_terminate_rport_io(rport); |
19a7b4ae JSEC |
2473 | scsi_remove_target(&rport->dev); |
2474 | } | |
2475 | ||
aedf3497 JS |
2476 | |
2477 | /** | |
2478 | * fc_rport_final_delete - finish rport termination and delete it. | |
c4028958 | 2479 | * @work: remote port to be deleted. |
eb44820c | 2480 | */ |
aedf3497 | 2481 | static void |
c4028958 | 2482 | fc_rport_final_delete(struct work_struct *work) |
aedf3497 | 2483 | { |
c4028958 DH |
2484 | struct fc_rport *rport = |
2485 | container_of(work, struct fc_rport, rport_delete_work); | |
aedf3497 JS |
2486 | struct device *dev = &rport->dev; |
2487 | struct Scsi_Host *shost = rport_to_shost(rport); | |
0f29b966 | 2488 | struct fc_internal *i = to_fc_internal(shost->transportt); |
92740b24 | 2489 | unsigned long flags; |
8798a694 | 2490 | int do_callback = 0; |
aedf3497 JS |
2491 | |
2492 | /* | |
9ef3e4a4 | 2493 | * if a scan is pending, flush the SCSI Host work_q so that |
aedf3497 JS |
2494 | * that we can reclaim the rport scan work element. |
2495 | */ | |
2496 | if (rport->flags & FC_RPORT_SCAN_PENDING) | |
2497 | scsi_flush_work(shost); | |
2498 | ||
fff9d40c | 2499 | fc_terminate_rport_io(rport); |
9e4f5e29 | 2500 | |
92740b24 JS |
2501 | /* |
2502 | * Cancel any outstanding timers. These should really exist | |
2503 | * only when rmmod'ing the LLDD and we're asking for | |
2504 | * immediate termination of the rports | |
2505 | */ | |
2506 | spin_lock_irqsave(shost->host_lock, flags); | |
2507 | if (rport->flags & FC_RPORT_DEVLOSS_PENDING) { | |
2508 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2509 | if (!cancel_delayed_work(&rport->fail_io_work)) | |
2510 | fc_flush_devloss(shost); | |
2511 | if (!cancel_delayed_work(&rport->dev_loss_work)) | |
2512 | fc_flush_devloss(shost); | |
2513 | spin_lock_irqsave(shost->host_lock, flags); | |
2514 | rport->flags &= ~FC_RPORT_DEVLOSS_PENDING; | |
2515 | } | |
2516 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2517 | ||
0f29b966 JS |
2518 | /* Delete SCSI target and sdevs */ |
2519 | if (rport->scsi_target_id != -1) | |
c4028958 | 2520 | fc_starget_delete(&rport->stgt_delete_work); |
92740b24 JS |
2521 | |
2522 | /* | |
2523 | * Notify the driver that the rport is now dead. The LLDD will | |
2524 | * also guarantee that any communication to the rport is terminated | |
4be98c0c JS |
2525 | * |
2526 | * Avoid this call if we already called it when we preserved the | |
2527 | * rport for the binding. | |
92740b24 | 2528 | */ |
8798a694 | 2529 | spin_lock_irqsave(shost->host_lock, flags); |
4be98c0c | 2530 | if (!(rport->flags & FC_RPORT_DEVLOSS_CALLBK_DONE) && |
8798a694 MR |
2531 | (i->f->dev_loss_tmo_callbk)) { |
2532 | rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE; | |
2533 | do_callback = 1; | |
2534 | } | |
2535 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2536 | ||
2537 | if (do_callback) | |
0f29b966 | 2538 | i->f->dev_loss_tmo_callbk(rport); |
0f29b966 | 2539 | |
9e4f5e29 JS |
2540 | fc_bsg_remove(rport->rqst_q); |
2541 | ||
aedf3497 JS |
2542 | transport_remove_device(dev); |
2543 | device_del(dev); | |
2544 | transport_destroy_device(dev); | |
3bdad7bd JS |
2545 | put_device(&shost->shost_gendev); /* for fc_host->rport list */ |
2546 | put_device(dev); /* for self-reference */ | |
aedf3497 JS |
2547 | } |
2548 | ||
2549 | ||
1da177e4 LT |
2550 | /** |
2551 | * fc_rport_create - allocates and creates a remote FC port. | |
2552 | * @shost: scsi host the remote port is connected to. | |
2553 | * @channel: Channel on shost port connected to. | |
2554 | * @ids: The world wide names, fc address, and FC4 port | |
2555 | * roles for the remote port. | |
2556 | * | |
2557 | * Allocates and creates the remoter port structure, including the | |
2558 | * class and sysfs creation. | |
2559 | * | |
2560 | * Notes: | |
2561 | * This routine assumes no locks are held on entry. | |
eb44820c | 2562 | */ |
44818efb | 2563 | static struct fc_rport * |
1da177e4 LT |
2564 | fc_rport_create(struct Scsi_Host *shost, int channel, |
2565 | struct fc_rport_identifiers *ids) | |
2566 | { | |
aedf3497 | 2567 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
1da177e4 LT |
2568 | struct fc_internal *fci = to_fc_internal(shost->transportt); |
2569 | struct fc_rport *rport; | |
2570 | struct device *dev; | |
2571 | unsigned long flags; | |
2572 | int error; | |
2573 | size_t size; | |
2574 | ||
2575 | size = (sizeof(struct fc_rport) + fci->f->dd_fcrport_size); | |
24669f75 | 2576 | rport = kzalloc(size, GFP_KERNEL); |
1da177e4 | 2577 | if (unlikely(!rport)) { |
cadbd4a5 | 2578 | printk(KERN_ERR "%s: allocation failure\n", __func__); |
1da177e4 LT |
2579 | return NULL; |
2580 | } | |
1da177e4 LT |
2581 | |
2582 | rport->maxframe_size = -1; | |
2583 | rport->supported_classes = FC_COS_UNSPECIFIED; | |
43ca910a | 2584 | rport->dev_loss_tmo = fc_host->dev_loss_tmo; |
1da177e4 LT |
2585 | memcpy(&rport->node_name, &ids->node_name, sizeof(rport->node_name)); |
2586 | memcpy(&rport->port_name, &ids->port_name, sizeof(rport->port_name)); | |
2587 | rport->port_id = ids->port_id; | |
2588 | rport->roles = ids->roles; | |
2589 | rport->port_state = FC_PORTSTATE_ONLINE; | |
2590 | if (fci->f->dd_fcrport_size) | |
2591 | rport->dd_data = &rport[1]; | |
2592 | rport->channel = channel; | |
0f29b966 | 2593 | rport->fast_io_fail_tmo = -1; |
1da177e4 | 2594 | |
c4028958 DH |
2595 | INIT_DELAYED_WORK(&rport->dev_loss_work, fc_timeout_deleted_rport); |
2596 | INIT_DELAYED_WORK(&rport->fail_io_work, fc_timeout_fail_rport_io); | |
2597 | INIT_WORK(&rport->scan_work, fc_scsi_scan_rport); | |
2598 | INIT_WORK(&rport->stgt_delete_work, fc_starget_delete); | |
2599 | INIT_WORK(&rport->rport_delete_work, fc_rport_final_delete); | |
1da177e4 LT |
2600 | |
2601 | spin_lock_irqsave(shost->host_lock, flags); | |
2602 | ||
2603 | rport->number = fc_host->next_rport_number++; | |
a53eb5e0 | 2604 | if (rport->roles & FC_PORT_ROLE_FCP_TARGET) |
1da177e4 LT |
2605 | rport->scsi_target_id = fc_host->next_target_id++; |
2606 | else | |
2607 | rport->scsi_target_id = -1; | |
aedf3497 | 2608 | list_add_tail(&rport->peers, &fc_host->rports); |
3bdad7bd | 2609 | get_device(&shost->shost_gendev); /* for fc_host->rport list */ |
1da177e4 LT |
2610 | |
2611 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2612 | ||
2613 | dev = &rport->dev; | |
3bdad7bd JS |
2614 | device_initialize(dev); /* takes self reference */ |
2615 | dev->parent = get_device(&shost->shost_gendev); /* parent reference */ | |
1da177e4 | 2616 | dev->release = fc_rport_dev_release; |
71610f55 KS |
2617 | dev_set_name(dev, "rport-%d:%d-%d", |
2618 | shost->host_no, channel, rport->number); | |
1da177e4 LT |
2619 | transport_setup_device(dev); |
2620 | ||
2621 | error = device_add(dev); | |
2622 | if (error) { | |
2623 | printk(KERN_ERR "FC Remote Port device_add failed\n"); | |
2624 | goto delete_rport; | |
2625 | } | |
2626 | transport_add_device(dev); | |
2627 | transport_configure_device(dev); | |
2628 | ||
9e4f5e29 JS |
2629 | fc_bsg_rportadd(shost, rport); |
2630 | /* ignore any bsg add error - we just can't do sgio */ | |
2631 | ||
a53eb5e0 | 2632 | if (rport->roles & FC_PORT_ROLE_FCP_TARGET) { |
1da177e4 | 2633 | /* initiate a scan of the target */ |
aedf3497 | 2634 | rport->flags |= FC_RPORT_SCAN_PENDING; |
1da177e4 | 2635 | scsi_queue_work(shost, &rport->scan_work); |
aedf3497 | 2636 | } |
1da177e4 LT |
2637 | |
2638 | return rport; | |
2639 | ||
2640 | delete_rport: | |
2641 | transport_destroy_device(dev); | |
1da177e4 LT |
2642 | spin_lock_irqsave(shost->host_lock, flags); |
2643 | list_del(&rport->peers); | |
3bdad7bd | 2644 | put_device(&shost->shost_gendev); /* for fc_host->rport list */ |
1da177e4 LT |
2645 | spin_unlock_irqrestore(shost->host_lock, flags); |
2646 | put_device(dev->parent); | |
2647 | kfree(rport); | |
2648 | return NULL; | |
2649 | } | |
2650 | ||
2651 | /** | |
eb44820c | 2652 | * fc_remote_port_add - notify fc transport of the existence of a remote FC port. |
1da177e4 LT |
2653 | * @shost: scsi host the remote port is connected to. |
2654 | * @channel: Channel on shost port connected to. | |
2655 | * @ids: The world wide names, fc address, and FC4 port | |
2656 | * roles for the remote port. | |
2657 | * | |
2658 | * The LLDD calls this routine to notify the transport of the existence | |
2659 | * of a remote port. The LLDD provides the unique identifiers (wwpn,wwn) | |
2660 | * of the port, it's FC address (port_id), and the FC4 roles that are | |
2661 | * active for the port. | |
2662 | * | |
2663 | * For ports that are FCP targets (aka scsi targets), the FC transport | |
2664 | * maintains consistent target id bindings on behalf of the LLDD. | |
2665 | * A consistent target id binding is an assignment of a target id to | |
2666 | * a remote port identifier, which persists while the scsi host is | |
2667 | * attached. The remote port can disappear, then later reappear, and | |
2668 | * it's target id assignment remains the same. This allows for shifts | |
2669 | * in FC addressing (if binding by wwpn or wwnn) with no apparent | |
2670 | * changes to the scsi subsystem which is based on scsi host number and | |
2671 | * target id values. Bindings are only valid during the attachment of | |
2672 | * the scsi host. If the host detaches, then later re-attaches, target | |
2673 | * id bindings may change. | |
2674 | * | |
2675 | * This routine is responsible for returning a remote port structure. | |
2676 | * The routine will search the list of remote ports it maintains | |
2677 | * internally on behalf of consistent target id mappings. If found, the | |
2678 | * remote port structure will be reused. Otherwise, a new remote port | |
2679 | * structure will be allocated. | |
2680 | * | |
2681 | * Whenever a remote port is allocated, a new fc_remote_port class | |
2682 | * device is created. | |
2683 | * | |
2684 | * Should not be called from interrupt context. | |
2685 | * | |
2686 | * Notes: | |
2687 | * This routine assumes no locks are held on entry. | |
eb44820c | 2688 | */ |
1da177e4 LT |
2689 | struct fc_rport * |
2690 | fc_remote_port_add(struct Scsi_Host *shost, int channel, | |
2691 | struct fc_rport_identifiers *ids) | |
2692 | { | |
19a7b4ae | 2693 | struct fc_internal *fci = to_fc_internal(shost->transportt); |
aedf3497 | 2694 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
1da177e4 LT |
2695 | struct fc_rport *rport; |
2696 | unsigned long flags; | |
2697 | int match = 0; | |
2698 | ||
aedf3497 JS |
2699 | /* ensure any stgt delete functions are done */ |
2700 | fc_flush_work(shost); | |
2701 | ||
19a7b4ae JSEC |
2702 | /* |
2703 | * Search the list of "active" rports, for an rport that has been | |
2704 | * deleted, but we've held off the real delete while the target | |
2705 | * is in a "blocked" state. | |
2706 | */ | |
2707 | spin_lock_irqsave(shost->host_lock, flags); | |
2708 | ||
aedf3497 | 2709 | list_for_each_entry(rport, &fc_host->rports, peers) { |
19a7b4ae JSEC |
2710 | |
2711 | if ((rport->port_state == FC_PORTSTATE_BLOCKED) && | |
2712 | (rport->channel == channel)) { | |
2713 | ||
aedf3497 | 2714 | switch (fc_host->tgtid_bind_type) { |
19a7b4ae JSEC |
2715 | case FC_TGTID_BIND_BY_WWPN: |
2716 | case FC_TGTID_BIND_NONE: | |
2717 | if (rport->port_name == ids->port_name) | |
2718 | match = 1; | |
2719 | break; | |
2720 | case FC_TGTID_BIND_BY_WWNN: | |
2721 | if (rport->node_name == ids->node_name) | |
2722 | match = 1; | |
2723 | break; | |
2724 | case FC_TGTID_BIND_BY_ID: | |
2725 | if (rport->port_id == ids->port_id) | |
2726 | match = 1; | |
2727 | break; | |
2728 | } | |
2729 | ||
2730 | if (match) { | |
19a7b4ae JSEC |
2731 | |
2732 | memcpy(&rport->node_name, &ids->node_name, | |
2733 | sizeof(rport->node_name)); | |
2734 | memcpy(&rport->port_name, &ids->port_name, | |
2735 | sizeof(rport->port_name)); | |
2736 | rport->port_id = ids->port_id; | |
2737 | ||
2738 | rport->port_state = FC_PORTSTATE_ONLINE; | |
2739 | rport->roles = ids->roles; | |
2740 | ||
2741 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2742 | ||
2743 | if (fci->f->dd_fcrport_size) | |
2744 | memset(rport->dd_data, 0, | |
2745 | fci->f->dd_fcrport_size); | |
2746 | ||
2747 | /* | |
92740b24 JS |
2748 | * If we were not a target, cancel the |
2749 | * io terminate and rport timers, and | |
2750 | * we're done. | |
2751 | * | |
2752 | * If we were a target, but our new role | |
2753 | * doesn't indicate a target, leave the | |
2754 | * timers running expecting the role to | |
2755 | * change as the target fully logs in. If | |
2756 | * it doesn't, the target will be torn down. | |
2757 | * | |
2758 | * If we were a target, and our role shows | |
2759 | * we're still a target, cancel the timers | |
2760 | * and kick off a scan. | |
19a7b4ae | 2761 | */ |
19a7b4ae | 2762 | |
92740b24 JS |
2763 | /* was a target, not in roles */ |
2764 | if ((rport->scsi_target_id != -1) && | |
a53eb5e0 | 2765 | (!(ids->roles & FC_PORT_ROLE_FCP_TARGET))) |
92740b24 | 2766 | return rport; |
19a7b4ae JSEC |
2767 | |
2768 | /* | |
92740b24 JS |
2769 | * Stop the fail io and dev_loss timers. |
2770 | * If they flush, the port_state will | |
2771 | * be checked and will NOOP the function. | |
19a7b4ae | 2772 | */ |
0f29b966 JS |
2773 | if (!cancel_delayed_work(&rport->fail_io_work)) |
2774 | fc_flush_devloss(shost); | |
92740b24 | 2775 | if (!cancel_delayed_work(&rport->dev_loss_work)) |
aedf3497 JS |
2776 | fc_flush_devloss(shost); |
2777 | ||
2778 | spin_lock_irqsave(shost->host_lock, flags); | |
2779 | ||
fff9d40c | 2780 | rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT | |
4be98c0c JS |
2781 | FC_RPORT_DEVLOSS_PENDING | |
2782 | FC_RPORT_DEVLOSS_CALLBK_DONE); | |
19a7b4ae | 2783 | |
92740b24 JS |
2784 | /* if target, initiate a scan */ |
2785 | if (rport->scsi_target_id != -1) { | |
2786 | rport->flags |= FC_RPORT_SCAN_PENDING; | |
2787 | scsi_queue_work(shost, | |
2788 | &rport->scan_work); | |
2789 | spin_unlock_irqrestore(shost->host_lock, | |
2790 | flags); | |
2791 | scsi_target_unblock(&rport->dev); | |
2792 | } else | |
2793 | spin_unlock_irqrestore(shost->host_lock, | |
2794 | flags); | |
a0785edf | 2795 | |
9e4f5e29 JS |
2796 | fc_bsg_goose_queue(rport); |
2797 | ||
19a7b4ae JSEC |
2798 | return rport; |
2799 | } | |
2800 | } | |
2801 | } | |
2802 | ||
92740b24 JS |
2803 | /* |
2804 | * Search the bindings array | |
2805 | * Note: if never a FCP target, you won't be on this list | |
2806 | */ | |
aedf3497 | 2807 | if (fc_host->tgtid_bind_type != FC_TGTID_BIND_NONE) { |
1da177e4 LT |
2808 | |
2809 | /* search for a matching consistent binding */ | |
2810 | ||
aedf3497 | 2811 | list_for_each_entry(rport, &fc_host->rport_bindings, |
1da177e4 LT |
2812 | peers) { |
2813 | if (rport->channel != channel) | |
2814 | continue; | |
2815 | ||
aedf3497 | 2816 | switch (fc_host->tgtid_bind_type) { |
1da177e4 LT |
2817 | case FC_TGTID_BIND_BY_WWPN: |
2818 | if (rport->port_name == ids->port_name) | |
2819 | match = 1; | |
2820 | break; | |
2821 | case FC_TGTID_BIND_BY_WWNN: | |
2822 | if (rport->node_name == ids->node_name) | |
2823 | match = 1; | |
2824 | break; | |
2825 | case FC_TGTID_BIND_BY_ID: | |
2826 | if (rport->port_id == ids->port_id) | |
2827 | match = 1; | |
2828 | break; | |
2829 | case FC_TGTID_BIND_NONE: /* to keep compiler happy */ | |
2830 | break; | |
2831 | } | |
2832 | ||
2833 | if (match) { | |
aedf3497 | 2834 | list_move_tail(&rport->peers, &fc_host->rports); |
1da177e4 LT |
2835 | break; |
2836 | } | |
2837 | } | |
2838 | ||
1da177e4 LT |
2839 | if (match) { |
2840 | memcpy(&rport->node_name, &ids->node_name, | |
2841 | sizeof(rport->node_name)); | |
2842 | memcpy(&rport->port_name, &ids->port_name, | |
2843 | sizeof(rport->port_name)); | |
2844 | rport->port_id = ids->port_id; | |
2845 | rport->roles = ids->roles; | |
2846 | rport->port_state = FC_PORTSTATE_ONLINE; | |
fff9d40c | 2847 | rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT; |
1da177e4 | 2848 | |
19a7b4ae JSEC |
2849 | if (fci->f->dd_fcrport_size) |
2850 | memset(rport->dd_data, 0, | |
2851 | fci->f->dd_fcrport_size); | |
2852 | ||
a53eb5e0 | 2853 | if (rport->roles & FC_PORT_ROLE_FCP_TARGET) { |
1da177e4 | 2854 | /* initiate a scan of the target */ |
aedf3497 | 2855 | rport->flags |= FC_RPORT_SCAN_PENDING; |
1da177e4 | 2856 | scsi_queue_work(shost, &rport->scan_work); |
a0785edf JS |
2857 | spin_unlock_irqrestore(shost->host_lock, flags); |
2858 | scsi_target_unblock(&rport->dev); | |
2859 | } else | |
2860 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1da177e4 LT |
2861 | |
2862 | return rport; | |
2863 | } | |
2864 | } | |
2865 | ||
19a7b4ae JSEC |
2866 | spin_unlock_irqrestore(shost->host_lock, flags); |
2867 | ||
1da177e4 LT |
2868 | /* No consistent binding found - create new remote port entry */ |
2869 | rport = fc_rport_create(shost, channel, ids); | |
2870 | ||
2871 | return rport; | |
2872 | } | |
2873 | EXPORT_SYMBOL(fc_remote_port_add); | |
2874 | ||
1da177e4 LT |
2875 | |
2876 | /** | |
eb44820c | 2877 | * fc_remote_port_delete - notifies the fc transport that a remote port is no longer in existence. |
1da177e4 LT |
2878 | * @rport: The remote port that no longer exists |
2879 | * | |
2880 | * The LLDD calls this routine to notify the transport that a remote | |
2881 | * port is no longer part of the topology. Note: Although a port | |
2882 | * may no longer be part of the topology, it may persist in the remote | |
19a7b4ae | 2883 | * ports displayed by the fc_host. We do this under 2 conditions: |
eb44820c | 2884 | * 1) If the port was a scsi target, we delay its deletion by "blocking" it. |
19a7b4ae JSEC |
2885 | * This allows the port to temporarily disappear, then reappear without |
2886 | * disrupting the SCSI device tree attached to it. During the "blocked" | |
2887 | * period the port will still exist. | |
eb44820c | 2888 | * 2) If the port was a scsi target and disappears for longer than we |
19a7b4ae JSEC |
2889 | * expect, we'll delete the port and the tear down the SCSI device tree |
2890 | * attached to it. However, we want to semi-persist the target id assigned | |
2891 | * to that port if it eventually does exist. The port structure will | |
2892 | * remain (although with minimal information) so that the target id | |
2893 | * bindings remails. | |
1da177e4 LT |
2894 | * |
2895 | * If the remote port is not an FCP Target, it will be fully torn down | |
2896 | * and deallocated, including the fc_remote_port class device. | |
2897 | * | |
19a7b4ae JSEC |
2898 | * If the remote port is an FCP Target, the port will be placed in a |
2899 | * temporary blocked state. From the LLDD's perspective, the rport no | |
2900 | * longer exists. From the SCSI midlayer's perspective, the SCSI target | |
2901 | * exists, but all sdevs on it are blocked from further I/O. The following | |
eb44820c RL |
2902 | * is then expected. |
2903 | * | |
19a7b4ae JSEC |
2904 | * If the remote port does not return (signaled by a LLDD call to |
2905 | * fc_remote_port_add()) within the dev_loss_tmo timeout, then the | |
2906 | * scsi target is removed - killing all outstanding i/o and removing the | |
2907 | * scsi devices attached ot it. The port structure will be marked Not | |
2908 | * Present and be partially cleared, leaving only enough information to | |
2909 | * recognize the remote port relative to the scsi target id binding if | |
2910 | * it later appears. The port will remain as long as there is a valid | |
2911 | * binding (e.g. until the user changes the binding type or unloads the | |
2912 | * scsi host with the binding). | |
1da177e4 | 2913 | * |
19a7b4ae JSEC |
2914 | * If the remote port returns within the dev_loss_tmo value (and matches |
2915 | * according to the target id binding type), the port structure will be | |
2916 | * reused. If it is no longer a SCSI target, the target will be torn | |
2917 | * down. If it continues to be a SCSI target, then the target will be | |
2918 | * unblocked (allowing i/o to be resumed), and a scan will be activated | |
2919 | * to ensure that all luns are detected. | |
2920 | * | |
2921 | * Called from normal process context only - cannot be called from interrupt. | |
1da177e4 LT |
2922 | * |
2923 | * Notes: | |
2924 | * This routine assumes no locks are held on entry. | |
eb44820c | 2925 | */ |
1da177e4 LT |
2926 | void |
2927 | fc_remote_port_delete(struct fc_rport *rport) | |
2928 | { | |
aedf3497 | 2929 | struct Scsi_Host *shost = rport_to_shost(rport); |
36dd288f | 2930 | unsigned long timeout = rport->dev_loss_tmo; |
aedf3497 JS |
2931 | unsigned long flags; |
2932 | ||
2933 | /* | |
2934 | * No need to flush the fc_host work_q's, as all adds are synchronous. | |
2935 | * | |
2936 | * We do need to reclaim the rport scan work element, so eventually | |
2937 | * (in fc_rport_final_delete()) we'll flush the scsi host work_q if | |
2938 | * there's still a scan pending. | |
2939 | */ | |
2940 | ||
2941 | spin_lock_irqsave(shost->host_lock, flags); | |
1da177e4 | 2942 | |
92740b24 | 2943 | if (rport->port_state != FC_PORTSTATE_ONLINE) { |
aedf3497 | 2944 | spin_unlock_irqrestore(shost->host_lock, flags); |
1da177e4 LT |
2945 | return; |
2946 | } | |
2947 | ||
92740b24 JS |
2948 | /* |
2949 | * In the past, we if this was not an FCP-Target, we would | |
2950 | * unconditionally just jump to deleting the rport. | |
2951 | * However, rports can be used as node containers by the LLDD, | |
2952 | * and its not appropriate to just terminate the rport at the | |
2953 | * first sign of a loss in connectivity. The LLDD may want to | |
2954 | * send ELS traffic to re-validate the login. If the rport is | |
2955 | * immediately deleted, it makes it inappropriate for a node | |
2956 | * container. | |
2957 | * So... we now unconditionally wait dev_loss_tmo before | |
2958 | * destroying an rport. | |
2959 | */ | |
2960 | ||
aedf3497 JS |
2961 | rport->port_state = FC_PORTSTATE_BLOCKED; |
2962 | ||
2963 | rport->flags |= FC_RPORT_DEVLOSS_PENDING; | |
2964 | ||
2965 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2966 | ||
7525236d FT |
2967 | if (rport->roles & FC_PORT_ROLE_FCP_INITIATOR && |
2968 | shost->active_mode & MODE_TARGET) | |
2969 | fc_tgt_it_nexus_destroy(shost, (unsigned long)rport); | |
2970 | ||
19a7b4ae | 2971 | scsi_target_block(&rport->dev); |
1da177e4 | 2972 | |
0f29b966 JS |
2973 | /* see if we need to kill io faster than waiting for device loss */ |
2974 | if ((rport->fast_io_fail_tmo != -1) && | |
fff9d40c | 2975 | (rport->fast_io_fail_tmo < timeout)) |
0f29b966 JS |
2976 | fc_queue_devloss_work(shost, &rport->fail_io_work, |
2977 | rport->fast_io_fail_tmo * HZ); | |
2978 | ||
19a7b4ae | 2979 | /* cap the length the devices can be blocked until they are deleted */ |
aedf3497 | 2980 | fc_queue_devloss_work(shost, &rport->dev_loss_work, timeout * HZ); |
1da177e4 LT |
2981 | } |
2982 | EXPORT_SYMBOL(fc_remote_port_delete); | |
2983 | ||
2984 | /** | |
eb44820c | 2985 | * fc_remote_port_rolechg - notifies the fc transport that the roles on a remote may have changed. |
1da177e4 | 2986 | * @rport: The remote port that changed. |
eb44820c | 2987 | * @roles: New roles for this port. |
1da177e4 | 2988 | * |
eb44820c RL |
2989 | * Description: The LLDD calls this routine to notify the transport that the |
2990 | * roles on a remote port may have changed. The largest effect of this is | |
1da177e4 LT |
2991 | * if a port now becomes a FCP Target, it must be allocated a |
2992 | * scsi target id. If the port is no longer a FCP target, any | |
2993 | * scsi target id value assigned to it will persist in case the | |
2994 | * role changes back to include FCP Target. No changes in the scsi | |
2995 | * midlayer will be invoked if the role changes (in the expectation | |
2996 | * that the role will be resumed. If it doesn't normal error processing | |
2997 | * will take place). | |
2998 | * | |
2999 | * Should not be called from interrupt context. | |
3000 | * | |
3001 | * Notes: | |
3002 | * This routine assumes no locks are held on entry. | |
eb44820c | 3003 | */ |
1da177e4 LT |
3004 | void |
3005 | fc_remote_port_rolechg(struct fc_rport *rport, u32 roles) | |
3006 | { | |
3007 | struct Scsi_Host *shost = rport_to_shost(rport); | |
aedf3497 | 3008 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
1da177e4 LT |
3009 | unsigned long flags; |
3010 | int create = 0; | |
7525236d | 3011 | int ret; |
1da177e4 | 3012 | |
1da177e4 | 3013 | spin_lock_irqsave(shost->host_lock, flags); |
a53eb5e0 | 3014 | if (roles & FC_PORT_ROLE_FCP_TARGET) { |
19a7b4ae JSEC |
3015 | if (rport->scsi_target_id == -1) { |
3016 | rport->scsi_target_id = fc_host->next_target_id++; | |
3017 | create = 1; | |
a53eb5e0 | 3018 | } else if (!(rport->roles & FC_PORT_ROLE_FCP_TARGET)) |
19a7b4ae | 3019 | create = 1; |
7525236d FT |
3020 | } else if (shost->active_mode & MODE_TARGET) { |
3021 | ret = fc_tgt_it_nexus_create(shost, (unsigned long)rport, | |
3022 | (char *)&rport->node_name); | |
3023 | if (ret) | |
3024 | printk(KERN_ERR "FC Remore Port tgt nexus failed %d\n", | |
3025 | ret); | |
1da177e4 | 3026 | } |
1da177e4 | 3027 | |
19a7b4ae JSEC |
3028 | rport->roles = roles; |
3029 | ||
aedf3497 JS |
3030 | spin_unlock_irqrestore(shost->host_lock, flags); |
3031 | ||
19a7b4ae JSEC |
3032 | if (create) { |
3033 | /* | |
3034 | * There may have been a delete timer running on the | |
3035 | * port. Ensure that it is cancelled as we now know | |
3036 | * the port is an FCP Target. | |
3037 | * Note: we know the rport is exists and in an online | |
3038 | * state as the LLDD would not have had an rport | |
3039 | * reference to pass us. | |
3040 | * | |
3041 | * Take no action on the del_timer failure as the state | |
3042 | * machine state change will validate the | |
3043 | * transaction. | |
3044 | */ | |
0f29b966 JS |
3045 | if (!cancel_delayed_work(&rport->fail_io_work)) |
3046 | fc_flush_devloss(shost); | |
19a7b4ae | 3047 | if (!cancel_delayed_work(&rport->dev_loss_work)) |
aedf3497 JS |
3048 | fc_flush_devloss(shost); |
3049 | ||
3050 | spin_lock_irqsave(shost->host_lock, flags); | |
fff9d40c MC |
3051 | rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT | |
3052 | FC_RPORT_DEVLOSS_PENDING); | |
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 | { | |
3819 | int flagset; | |
39562e78 | 3820 | unsigned long flags; |
9e4f5e29 JS |
3821 | |
3822 | if (!rport->rqst_q) | |
3823 | return; | |
3824 | ||
3825 | get_device(&rport->dev); | |
3826 | ||
39562e78 | 3827 | spin_lock_irqsave(rport->rqst_q->queue_lock, flags); |
9e4f5e29 JS |
3828 | flagset = test_bit(QUEUE_FLAG_REENTER, &rport->rqst_q->queue_flags) && |
3829 | !test_bit(QUEUE_FLAG_REENTER, &rport->rqst_q->queue_flags); | |
3830 | if (flagset) | |
3831 | queue_flag_set(QUEUE_FLAG_REENTER, rport->rqst_q); | |
1654e741 | 3832 | __blk_run_queue(rport->rqst_q, false); |
9e4f5e29 JS |
3833 | if (flagset) |
3834 | queue_flag_clear(QUEUE_FLAG_REENTER, rport->rqst_q); | |
39562e78 | 3835 | spin_unlock_irqrestore(rport->rqst_q->queue_lock, flags); |
9e4f5e29 JS |
3836 | |
3837 | put_device(&rport->dev); | |
3838 | } | |
3839 | ||
3840 | ||
3841 | /** | |
3842 | * fc_bsg_rport_dispatch - process rport bsg requests and dispatch to LLDD | |
5415907a | 3843 | * @q: rport request queue |
9e4f5e29 JS |
3844 | * @shost: scsi host rport attached to |
3845 | * @rport: rport request destined to | |
3846 | * @job: bsg job to be processed | |
3847 | */ | |
3848 | static enum fc_dispatch_result | |
3849 | fc_bsg_rport_dispatch(struct request_queue *q, struct Scsi_Host *shost, | |
3850 | struct fc_rport *rport, struct fc_bsg_job *job) | |
3851 | { | |
3852 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
3853 | int cmdlen = sizeof(uint32_t); /* start with length of msgcode */ | |
3854 | int ret; | |
3855 | ||
3856 | /* Validate the rport command */ | |
3857 | switch (job->request->msgcode) { | |
3858 | case FC_BSG_RPT_ELS: | |
3859 | cmdlen += sizeof(struct fc_bsg_rport_els); | |
3860 | goto check_bidi; | |
3861 | ||
3862 | case FC_BSG_RPT_CT: | |
3863 | cmdlen += sizeof(struct fc_bsg_rport_ct); | |
3864 | check_bidi: | |
3865 | /* there better be xmt and rcv payloads */ | |
3866 | if ((!job->request_payload.payload_len) || | |
3867 | (!job->reply_payload.payload_len)) { | |
3868 | ret = -EINVAL; | |
3869 | goto fail_rport_msg; | |
3870 | } | |
3871 | break; | |
3872 | default: | |
3873 | ret = -EBADR; | |
3874 | goto fail_rport_msg; | |
3875 | } | |
3876 | ||
3877 | /* check if we really have all the request data needed */ | |
3878 | if (job->request_len < cmdlen) { | |
3879 | ret = -ENOMSG; | |
3880 | goto fail_rport_msg; | |
3881 | } | |
3882 | ||
3883 | ret = i->f->bsg_request(job); | |
3884 | if (!ret) | |
3885 | return FC_DISPATCH_UNLOCKED; | |
3886 | ||
3887 | fail_rport_msg: | |
3888 | /* return the errno failure code as the only status */ | |
3889 | BUG_ON(job->reply_len < sizeof(uint32_t)); | |
61ec33eb | 3890 | job->reply->reply_payload_rcv_len = 0; |
9e4f5e29 JS |
3891 | job->reply->result = ret; |
3892 | job->reply_len = sizeof(uint32_t); | |
3893 | fc_bsg_jobdone(job); | |
3894 | return FC_DISPATCH_UNLOCKED; | |
3895 | } | |
3896 | ||
3897 | ||
3898 | /** | |
3899 | * fc_bsg_request_handler - generic handler for bsg requests | |
3900 | * @q: request queue to manage | |
3901 | * @shost: Scsi_Host related to the bsg object | |
3902 | * @rport: FC remote port related to the bsg object (optional) | |
3903 | * @dev: device structure for bsg object | |
3904 | */ | |
3905 | static void | |
3906 | fc_bsg_request_handler(struct request_queue *q, struct Scsi_Host *shost, | |
3907 | struct fc_rport *rport, struct device *dev) | |
3908 | { | |
3909 | struct request *req; | |
3910 | struct fc_bsg_job *job; | |
3911 | enum fc_dispatch_result ret; | |
3912 | ||
3913 | if (!get_device(dev)) | |
3914 | return; | |
3915 | ||
7eaceacc | 3916 | while (1) { |
2bc1c59d MC |
3917 | if (rport && (rport->port_state == FC_PORTSTATE_BLOCKED) && |
3918 | !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)) | |
3919 | break; | |
9e4f5e29 JS |
3920 | |
3921 | req = blk_fetch_request(q); | |
3922 | if (!req) | |
3923 | break; | |
3924 | ||
3925 | if (rport && (rport->port_state != FC_PORTSTATE_ONLINE)) { | |
3926 | req->errors = -ENXIO; | |
3927 | spin_unlock_irq(q->queue_lock); | |
d88a714b | 3928 | blk_end_request_all(req, -ENXIO); |
9e4f5e29 JS |
3929 | spin_lock_irq(q->queue_lock); |
3930 | continue; | |
3931 | } | |
3932 | ||
3933 | spin_unlock_irq(q->queue_lock); | |
3934 | ||
3935 | ret = fc_req_to_bsgjob(shost, rport, req); | |
3936 | if (ret) { | |
3937 | req->errors = ret; | |
d88a714b | 3938 | blk_end_request_all(req, ret); |
9e4f5e29 JS |
3939 | spin_lock_irq(q->queue_lock); |
3940 | continue; | |
3941 | } | |
3942 | ||
3943 | job = req->special; | |
3944 | ||
3945 | /* check if we have the msgcode value at least */ | |
3946 | if (job->request_len < sizeof(uint32_t)) { | |
3947 | BUG_ON(job->reply_len < sizeof(uint32_t)); | |
61ec33eb | 3948 | job->reply->reply_payload_rcv_len = 0; |
9e4f5e29 JS |
3949 | job->reply->result = -ENOMSG; |
3950 | job->reply_len = sizeof(uint32_t); | |
3951 | fc_bsg_jobdone(job); | |
3952 | spin_lock_irq(q->queue_lock); | |
3953 | continue; | |
3954 | } | |
3955 | ||
3956 | /* the dispatch routines will unlock the queue_lock */ | |
3957 | if (rport) | |
3958 | ret = fc_bsg_rport_dispatch(q, shost, rport, job); | |
3959 | else | |
3960 | ret = fc_bsg_host_dispatch(q, shost, job); | |
3961 | ||
3962 | /* did dispatcher hit state that can't process any more */ | |
3963 | if (ret == FC_DISPATCH_BREAK) | |
3964 | break; | |
3965 | ||
3966 | /* did dispatcher had released the lock */ | |
3967 | if (ret == FC_DISPATCH_UNLOCKED) | |
3968 | spin_lock_irq(q->queue_lock); | |
3969 | } | |
3970 | ||
3971 | spin_unlock_irq(q->queue_lock); | |
3972 | put_device(dev); | |
3973 | spin_lock_irq(q->queue_lock); | |
3974 | } | |
3975 | ||
3976 | ||
3977 | /** | |
3978 | * fc_bsg_host_handler - handler for bsg requests for a fc host | |
3979 | * @q: fc host request queue | |
3980 | */ | |
3981 | static void | |
3982 | fc_bsg_host_handler(struct request_queue *q) | |
3983 | { | |
3984 | struct Scsi_Host *shost = q->queuedata; | |
3985 | ||
3986 | fc_bsg_request_handler(q, shost, NULL, &shost->shost_gendev); | |
3987 | } | |
3988 | ||
3989 | ||
3990 | /** | |
3991 | * fc_bsg_rport_handler - handler for bsg requests for a fc rport | |
3992 | * @q: rport request queue | |
3993 | */ | |
3994 | static void | |
3995 | fc_bsg_rport_handler(struct request_queue *q) | |
3996 | { | |
3997 | struct fc_rport *rport = q->queuedata; | |
3998 | struct Scsi_Host *shost = rport_to_shost(rport); | |
3999 | ||
4000 | fc_bsg_request_handler(q, shost, rport, &rport->dev); | |
4001 | } | |
4002 | ||
4003 | ||
4004 | /** | |
4005 | * fc_bsg_hostadd - Create and add the bsg hooks so we can receive requests | |
4006 | * @shost: shost for fc_host | |
4007 | * @fc_host: fc_host adding the structures to | |
4008 | */ | |
4009 | static int | |
4010 | fc_bsg_hostadd(struct Scsi_Host *shost, struct fc_host_attrs *fc_host) | |
4011 | { | |
4012 | struct device *dev = &shost->shost_gendev; | |
4013 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
4014 | struct request_queue *q; | |
4015 | int err; | |
3c559ea8 | 4016 | char bsg_name[20]; |
9e4f5e29 JS |
4017 | |
4018 | fc_host->rqst_q = NULL; | |
4019 | ||
4020 | if (!i->f->bsg_request) | |
4021 | return -ENOTSUPP; | |
4022 | ||
4023 | snprintf(bsg_name, sizeof(bsg_name), | |
4024 | "fc_host%d", shost->host_no); | |
4025 | ||
4026 | q = __scsi_alloc_queue(shost, fc_bsg_host_handler); | |
4027 | if (!q) { | |
4028 | printk(KERN_ERR "fc_host%d: bsg interface failed to " | |
4029 | "initialize - no request queue\n", | |
4030 | shost->host_no); | |
4031 | return -ENOMEM; | |
4032 | } | |
4033 | ||
4034 | q->queuedata = shost; | |
4035 | queue_flag_set_unlocked(QUEUE_FLAG_BIDI, q); | |
b5c6f776 | 4036 | blk_queue_softirq_done(q, fc_bsg_softirq_done); |
9e4f5e29 JS |
4037 | blk_queue_rq_timed_out(q, fc_bsg_job_timeout); |
4038 | blk_queue_rq_timeout(q, FC_DEFAULT_BSG_TIMEOUT); | |
4039 | ||
4040 | err = bsg_register_queue(q, dev, bsg_name, NULL); | |
4041 | if (err) { | |
4042 | printk(KERN_ERR "fc_host%d: bsg interface failed to " | |
4043 | "initialize - register queue\n", | |
4044 | shost->host_no); | |
4045 | blk_cleanup_queue(q); | |
4046 | return err; | |
4047 | } | |
4048 | ||
4049 | fc_host->rqst_q = q; | |
4050 | return 0; | |
4051 | } | |
4052 | ||
4053 | ||
4054 | /** | |
4055 | * fc_bsg_rportadd - Create and add the bsg hooks so we can receive requests | |
4056 | * @shost: shost that rport is attached to | |
4057 | * @rport: rport that the bsg hooks are being attached to | |
4058 | */ | |
4059 | static int | |
4060 | fc_bsg_rportadd(struct Scsi_Host *shost, struct fc_rport *rport) | |
4061 | { | |
4062 | struct device *dev = &rport->dev; | |
4063 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
4064 | struct request_queue *q; | |
4065 | int err; | |
4066 | ||
4067 | rport->rqst_q = NULL; | |
4068 | ||
4069 | if (!i->f->bsg_request) | |
4070 | return -ENOTSUPP; | |
4071 | ||
4072 | q = __scsi_alloc_queue(shost, fc_bsg_rport_handler); | |
4073 | if (!q) { | |
4074 | printk(KERN_ERR "%s: bsg interface failed to " | |
4075 | "initialize - no request queue\n", | |
4076 | dev->kobj.name); | |
4077 | return -ENOMEM; | |
4078 | } | |
4079 | ||
4080 | q->queuedata = rport; | |
4081 | queue_flag_set_unlocked(QUEUE_FLAG_BIDI, q); | |
b5c6f776 | 4082 | blk_queue_softirq_done(q, fc_bsg_softirq_done); |
9e4f5e29 JS |
4083 | blk_queue_rq_timed_out(q, fc_bsg_job_timeout); |
4084 | blk_queue_rq_timeout(q, BLK_DEFAULT_SG_TIMEOUT); | |
4085 | ||
4086 | err = bsg_register_queue(q, dev, NULL, NULL); | |
4087 | if (err) { | |
4088 | printk(KERN_ERR "%s: bsg interface failed to " | |
4089 | "initialize - register queue\n", | |
4090 | dev->kobj.name); | |
4091 | blk_cleanup_queue(q); | |
4092 | return err; | |
4093 | } | |
4094 | ||
4095 | rport->rqst_q = q; | |
4096 | return 0; | |
4097 | } | |
4098 | ||
4099 | ||
4100 | /** | |
4101 | * fc_bsg_remove - Deletes the bsg hooks on fchosts/rports | |
4102 | * @q: the request_queue that is to be torn down. | |
78d16341 JS |
4103 | * |
4104 | * Notes: | |
4105 | * Before unregistering the queue empty any requests that are blocked | |
4106 | * | |
4107 | * | |
9e4f5e29 JS |
4108 | */ |
4109 | static void | |
4110 | fc_bsg_remove(struct request_queue *q) | |
4111 | { | |
78d16341 JS |
4112 | struct request *req; /* block request */ |
4113 | int counts; /* totals for request_list count and starved */ | |
4114 | ||
9e4f5e29 | 4115 | if (q) { |
78d16341 JS |
4116 | /* Stop taking in new requests */ |
4117 | spin_lock_irq(q->queue_lock); | |
4118 | blk_stop_queue(q); | |
4119 | ||
4120 | /* drain all requests in the queue */ | |
4121 | while (1) { | |
4122 | /* need the lock to fetch a request | |
4123 | * this may fetch the same reqeust as the previous pass | |
4124 | */ | |
4125 | req = blk_fetch_request(q); | |
4126 | /* save requests in use and starved */ | |
4127 | counts = q->rq.count[0] + q->rq.count[1] + | |
4128 | q->rq.starved[0] + q->rq.starved[1]; | |
4129 | spin_unlock_irq(q->queue_lock); | |
4130 | /* any requests still outstanding? */ | |
4131 | if (counts == 0) | |
4132 | break; | |
4133 | ||
4134 | /* This may be the same req as the previous iteration, | |
4135 | * always send the blk_end_request_all after a prefetch. | |
4136 | * It is not okay to not end the request because the | |
4137 | * prefetch started the request. | |
4138 | */ | |
4139 | if (req) { | |
4140 | /* return -ENXIO to indicate that this queue is | |
4141 | * going away | |
4142 | */ | |
4143 | req->errors = -ENXIO; | |
4144 | blk_end_request_all(req, -ENXIO); | |
4145 | } | |
4146 | ||
4147 | msleep(200); /* allow bsg to possibly finish */ | |
4148 | spin_lock_irq(q->queue_lock); | |
4149 | } | |
4150 | ||
9e4f5e29 JS |
4151 | bsg_unregister_queue(q); |
4152 | blk_cleanup_queue(q); | |
4153 | } | |
4154 | } | |
4155 | ||
4156 | ||
9ef3e4a4 JS |
4157 | /* Original Author: Martin Hicks */ |
4158 | MODULE_AUTHOR("James Smart"); | |
1da177e4 LT |
4159 | MODULE_DESCRIPTION("FC Transport Attributes"); |
4160 | MODULE_LICENSE("GPL"); | |
4161 | ||
4162 | module_init(fc_transport_init); | |
4163 | module_exit(fc_transport_exit); |