blob: b98885de6876c76c7b1b52f95b4a06a6fd7d100c [file] [log] [blame]
James Smart9ef3e4a2007-05-24 19:04:44 -04001/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07002 * 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 *
James Smarta53eb5e2007-04-27 12:41:09 -040022 * Copyright (C) 2004-2007 James Smart, Emulex Corporation
Linus Torvalds1da177e2005-04-16 15:20:36 -070023 * Rewrite for host, target, device, and remote port attributes,
24 * statistics, and service functions...
James Smart9ef3e4a2007-05-24 19:04:44 -040025 * Add vports, etc
Linus Torvalds1da177e2005-04-16 15:20:36 -070026 *
27 */
28#include <linux/module.h>
29#include <linux/init.h>
30#include <scsi/scsi_device.h>
31#include <scsi/scsi_host.h>
32#include <scsi/scsi_transport.h>
33#include <scsi/scsi_transport_fc.h>
James Smartc829c392006-03-13 08:28:57 -050034#include <scsi/scsi_cmnd.h>
James Smart84314fd2006-08-18 17:30:09 -040035#include <linux/netlink.h>
36#include <net/netlink.h>
37#include <scsi/scsi_netlink_fc.h>
James Smart9e4f5e22009-03-26 13:33:19 -040038#include <scsi/scsi_bsg_fc.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070039#include "scsi_priv.h"
FUJITA Tomonori75252362007-09-01 02:02:27 +090040#include "scsi_transport_fc_internal.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070041
James Smartaedf3492006-04-10 10:14:05 -040042static int fc_queue_work(struct Scsi_Host *, struct work_struct *);
James Smart9ef3e4a2007-05-24 19:04:44 -040043static void fc_vport_sched_delete(struct work_struct *work);
Andrew Vasqueza30c3f62008-07-18 08:32:52 -070044static int fc_vport_setup(struct Scsi_Host *shost, int channel,
James Smarta53eb5e2007-04-27 12:41:09 -040045 struct device *pdev, struct fc_vport_identifiers *ids,
46 struct fc_vport **vport);
James Smart9e4f5e22009-03-26 13:33:19 -040047static int fc_bsg_hostadd(struct Scsi_Host *, struct fc_host_attrs *);
48static int fc_bsg_rportadd(struct Scsi_Host *, struct fc_rport *);
49static void fc_bsg_remove(struct request_queue *);
50static void fc_bsg_goose_queue(struct fc_rport *);
James Smarta53eb5e2007-04-27 12:41:09 -040051
52/*
Linus Torvalds1da177e2005-04-16 15:20:36 -070053 * Redefine so that we can have same named attributes in the
54 * sdev/starget/host objects.
55 */
Tony Jonesee959b02008-02-22 00:13:36 +010056#define FC_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \
57struct device_attribute device_attr_##_prefix##_##_name = \
Linus Torvalds1da177e2005-04-16 15:20:36 -070058 __ATTR(_name,_mode,_show,_store)
59
60#define fc_enum_name_search(title, table_type, table) \
61static const char *get_fc_##title##_name(enum table_type table_key) \
62{ \
63 int i; \
64 char *name = NULL; \
65 \
Tobias Klauser6391a112006-06-08 22:23:48 -070066 for (i = 0; i < ARRAY_SIZE(table); i++) { \
Linus Torvalds1da177e2005-04-16 15:20:36 -070067 if (table[i].value == table_key) { \
68 name = table[i].name; \
69 break; \
70 } \
71 } \
72 return name; \
73}
74
75#define fc_enum_name_match(title, table_type, table) \
76static int get_fc_##title##_match(const char *table_key, \
77 enum table_type *value) \
78{ \
79 int i; \
80 \
Tobias Klauser6391a112006-06-08 22:23:48 -070081 for (i = 0; i < ARRAY_SIZE(table); i++) { \
Linus Torvalds1da177e2005-04-16 15:20:36 -070082 if (strncmp(table_key, table[i].name, \
83 table[i].matchlen) == 0) { \
84 *value = table[i].value; \
85 return 0; /* success */ \
86 } \
87 } \
88 return 1; /* failure */ \
89}
90
91
92/* Convert fc_port_type values to ascii string name */
93static struct {
94 enum fc_port_type value;
95 char *name;
96} fc_port_type_names[] = {
97 { FC_PORTTYPE_UNKNOWN, "Unknown" },
98 { FC_PORTTYPE_OTHER, "Other" },
99 { FC_PORTTYPE_NOTPRESENT, "Not Present" },
100 { FC_PORTTYPE_NPORT, "NPort (fabric via point-to-point)" },
101 { FC_PORTTYPE_NLPORT, "NLPort (fabric via loop)" },
102 { FC_PORTTYPE_LPORT, "LPort (private loop)" },
Christof Schmitt951948a2009-01-15 16:51:48 +0100103 { FC_PORTTYPE_PTP, "Point-To-Point (direct nport connection)" },
James Smarta53eb5e2007-04-27 12:41:09 -0400104 { FC_PORTTYPE_NPIV, "NPIV VPORT" },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105};
106fc_enum_name_search(port_type, fc_port_type, fc_port_type_names)
107#define FC_PORTTYPE_MAX_NAMELEN 50
108
James Smarta53eb5e2007-04-27 12:41:09 -0400109/* Reuse fc_port_type enum function for vport_type */
110#define get_fc_vport_type_name get_fc_port_type_name
111
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112
James Smart84314fd2006-08-18 17:30:09 -0400113/* Convert fc_host_event_code values to ascii string name */
114static const struct {
115 enum fc_host_event_code value;
116 char *name;
117} fc_host_event_code_names[] = {
118 { FCH_EVT_LIP, "lip" },
119 { FCH_EVT_LINKUP, "link_up" },
120 { FCH_EVT_LINKDOWN, "link_down" },
121 { FCH_EVT_LIPRESET, "lip_reset" },
122 { FCH_EVT_RSCN, "rscn" },
123 { FCH_EVT_ADAPTER_CHANGE, "adapter_chg" },
124 { FCH_EVT_PORT_UNKNOWN, "port_unknown" },
125 { FCH_EVT_PORT_ONLINE, "port_online" },
126 { FCH_EVT_PORT_OFFLINE, "port_offline" },
127 { FCH_EVT_PORT_FABRIC, "port_fabric" },
128 { FCH_EVT_LINK_UNKNOWN, "link_unknown" },
129 { FCH_EVT_VENDOR_UNIQUE, "vendor_unique" },
130};
131fc_enum_name_search(host_event_code, fc_host_event_code,
132 fc_host_event_code_names)
133#define FC_HOST_EVENT_CODE_MAX_NAMELEN 30
134
135
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136/* Convert fc_port_state values to ascii string name */
137static struct {
138 enum fc_port_state value;
139 char *name;
140} fc_port_state_names[] = {
141 { FC_PORTSTATE_UNKNOWN, "Unknown" },
142 { FC_PORTSTATE_NOTPRESENT, "Not Present" },
143 { FC_PORTSTATE_ONLINE, "Online" },
144 { FC_PORTSTATE_OFFLINE, "Offline" },
145 { FC_PORTSTATE_BLOCKED, "Blocked" },
146 { FC_PORTSTATE_BYPASSED, "Bypassed" },
147 { FC_PORTSTATE_DIAGNOSTICS, "Diagnostics" },
148 { FC_PORTSTATE_LINKDOWN, "Linkdown" },
149 { FC_PORTSTATE_ERROR, "Error" },
150 { FC_PORTSTATE_LOOPBACK, "Loopback" },
James.Smart@Emulex.Com42e33142005-12-15 09:56:22 -0500151 { FC_PORTSTATE_DELETED, "Deleted" },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152};
153fc_enum_name_search(port_state, fc_port_state, fc_port_state_names)
154#define FC_PORTSTATE_MAX_NAMELEN 20
155
156
James Smarta53eb5e2007-04-27 12:41:09 -0400157/* Convert fc_vport_state values to ascii string name */
158static struct {
159 enum fc_vport_state value;
160 char *name;
161} fc_vport_state_names[] = {
162 { FC_VPORT_UNKNOWN, "Unknown" },
163 { FC_VPORT_ACTIVE, "Active" },
164 { FC_VPORT_DISABLED, "Disabled" },
165 { FC_VPORT_LINKDOWN, "Linkdown" },
166 { FC_VPORT_INITIALIZING, "Initializing" },
167 { FC_VPORT_NO_FABRIC_SUPP, "No Fabric Support" },
168 { FC_VPORT_NO_FABRIC_RSCS, "No Fabric Resources" },
169 { FC_VPORT_FABRIC_LOGOUT, "Fabric Logout" },
170 { FC_VPORT_FABRIC_REJ_WWN, "Fabric Rejected WWN" },
171 { FC_VPORT_FAILED, "VPort Failed" },
172};
173fc_enum_name_search(vport_state, fc_vport_state, fc_vport_state_names)
174#define FC_VPORTSTATE_MAX_NAMELEN 24
175
176/* Reuse fc_vport_state enum function for vport_last_state */
177#define get_fc_vport_last_state_name get_fc_vport_state_name
178
179
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180/* Convert fc_tgtid_binding_type values to ascii string name */
Arjan van de Ven0ad78202005-11-28 16:22:25 +0100181static const struct {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182 enum fc_tgtid_binding_type value;
183 char *name;
184 int matchlen;
185} fc_tgtid_binding_type_names[] = {
186 { FC_TGTID_BIND_NONE, "none", 4 },
187 { FC_TGTID_BIND_BY_WWPN, "wwpn (World Wide Port Name)", 4 },
188 { FC_TGTID_BIND_BY_WWNN, "wwnn (World Wide Node Name)", 4 },
189 { FC_TGTID_BIND_BY_ID, "port_id (FC Address)", 7 },
190};
191fc_enum_name_search(tgtid_bind_type, fc_tgtid_binding_type,
192 fc_tgtid_binding_type_names)
193fc_enum_name_match(tgtid_bind_type, fc_tgtid_binding_type,
194 fc_tgtid_binding_type_names)
195#define FC_BINDTYPE_MAX_NAMELEN 30
196
197
198#define fc_bitfield_name_search(title, table) \
199static ssize_t \
200get_fc_##title##_names(u32 table_key, char *buf) \
201{ \
202 char *prefix = ""; \
203 ssize_t len = 0; \
204 int i; \
205 \
Tobias Klauser6391a112006-06-08 22:23:48 -0700206 for (i = 0; i < ARRAY_SIZE(table); i++) { \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700207 if (table[i].value & table_key) { \
208 len += sprintf(buf + len, "%s%s", \
209 prefix, table[i].name); \
210 prefix = ", "; \
211 } \
212 } \
213 len += sprintf(buf + len, "\n"); \
214 return len; \
215}
216
217
218/* Convert FC_COS bit values to ascii string name */
Arjan van de Ven0ad78202005-11-28 16:22:25 +0100219static const struct {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700220 u32 value;
221 char *name;
222} fc_cos_names[] = {
223 { FC_COS_CLASS1, "Class 1" },
224 { FC_COS_CLASS2, "Class 2" },
225 { FC_COS_CLASS3, "Class 3" },
226 { FC_COS_CLASS4, "Class 4" },
227 { FC_COS_CLASS6, "Class 6" },
228};
229fc_bitfield_name_search(cos, fc_cos_names)
230
231
232/* Convert FC_PORTSPEED bit values to ascii string name */
Arjan van de Ven0ad78202005-11-28 16:22:25 +0100233static const struct {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234 u32 value;
235 char *name;
236} fc_port_speed_names[] = {
237 { FC_PORTSPEED_1GBIT, "1 Gbit" },
238 { FC_PORTSPEED_2GBIT, "2 Gbit" },
239 { FC_PORTSPEED_4GBIT, "4 Gbit" },
240 { FC_PORTSPEED_10GBIT, "10 Gbit" },
James Smartc3d23502007-03-12 14:16:35 -0500241 { FC_PORTSPEED_8GBIT, "8 Gbit" },
242 { FC_PORTSPEED_16GBIT, "16 Gbit" },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243 { FC_PORTSPEED_NOT_NEGOTIATED, "Not Negotiated" },
244};
245fc_bitfield_name_search(port_speed, fc_port_speed_names)
246
247
248static int
249show_fc_fc4s (char *buf, u8 *fc4_list)
250{
251 int i, len=0;
252
253 for (i = 0; i < FC_FC4_LIST_SIZE; i++, fc4_list++)
254 len += sprintf(buf + len , "0x%02x ", *fc4_list);
255 len += sprintf(buf + len, "\n");
256 return len;
257}
258
259
James Smarta53eb5e2007-04-27 12:41:09 -0400260/* Convert FC_PORT_ROLE bit values to ascii string name */
Arjan van de Ven0ad78202005-11-28 16:22:25 +0100261static const struct {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700262 u32 value;
263 char *name;
James Smarta53eb5e2007-04-27 12:41:09 -0400264} fc_port_role_names[] = {
265 { FC_PORT_ROLE_FCP_TARGET, "FCP Target" },
266 { FC_PORT_ROLE_FCP_INITIATOR, "FCP Initiator" },
267 { FC_PORT_ROLE_IP_PORT, "IP Port" },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268};
James Smarta53eb5e2007-04-27 12:41:09 -0400269fc_bitfield_name_search(port_roles, fc_port_role_names)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270
271/*
272 * Define roles that are specific to port_id. Values are relative to ROLE_MASK.
273 */
274#define FC_WELLKNOWN_PORTID_MASK 0xfffff0
275#define FC_WELLKNOWN_ROLE_MASK 0x00000f
276#define FC_FPORT_PORTID 0x00000e
277#define FC_FABCTLR_PORTID 0x00000d
278#define FC_DIRSRVR_PORTID 0x00000c
279#define FC_TIMESRVR_PORTID 0x00000b
280#define FC_MGMTSRVR_PORTID 0x00000a
281
282
David Howellsc4028952006-11-22 14:57:56 +0000283static void fc_timeout_deleted_rport(struct work_struct *work);
284static void fc_timeout_fail_rport_io(struct work_struct *work);
285static void fc_scsi_scan_rport(struct work_struct *work);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700286
287/*
288 * Attribute counts pre object type...
289 * Increase these values if you add attributes
290 */
291#define FC_STARGET_NUM_ATTRS 3
James Smart0f29b962006-08-18 17:33:29 -0400292#define FC_RPORT_NUM_ATTRS 10
James Smarta53eb5e2007-04-27 12:41:09 -0400293#define FC_VPORT_NUM_ATTRS 9
James Smart46436822009-07-28 12:30:01 -0400294#define FC_HOST_NUM_ATTRS 22
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295
296struct fc_internal {
297 struct scsi_transport_template t;
298 struct fc_function_template *f;
299
300 /*
301 * For attributes : each object has :
302 * An array of the actual attributes structures
303 * An array of null-terminated pointers to the attribute
304 * structures - used for mid-layer interaction.
305 *
306 * The attribute containers for the starget and host are are
307 * part of the midlayer. As the remote port is specific to the
308 * fc transport, we must provide the attribute container.
309 */
Tony Jonesee959b02008-02-22 00:13:36 +0100310 struct device_attribute private_starget_attrs[
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311 FC_STARGET_NUM_ATTRS];
Tony Jonesee959b02008-02-22 00:13:36 +0100312 struct device_attribute *starget_attrs[FC_STARGET_NUM_ATTRS + 1];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700313
Tony Jonesee959b02008-02-22 00:13:36 +0100314 struct device_attribute private_host_attrs[FC_HOST_NUM_ATTRS];
315 struct device_attribute *host_attrs[FC_HOST_NUM_ATTRS + 1];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700316
317 struct transport_container rport_attr_cont;
Tony Jonesee959b02008-02-22 00:13:36 +0100318 struct device_attribute private_rport_attrs[FC_RPORT_NUM_ATTRS];
319 struct device_attribute *rport_attrs[FC_RPORT_NUM_ATTRS + 1];
James Smarta53eb5e2007-04-27 12:41:09 -0400320
321 struct transport_container vport_attr_cont;
Tony Jonesee959b02008-02-22 00:13:36 +0100322 struct device_attribute private_vport_attrs[FC_VPORT_NUM_ATTRS];
323 struct device_attribute *vport_attrs[FC_VPORT_NUM_ATTRS + 1];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700324};
325
326#define to_fc_internal(tmpl) container_of(tmpl, struct fc_internal, t)
327
James Bottomleyd0a7e572005-08-14 17:09:01 -0500328static int fc_target_setup(struct transport_container *tc, struct device *dev,
Tony Jonesee959b02008-02-22 00:13:36 +0100329 struct device *cdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330{
331 struct scsi_target *starget = to_scsi_target(dev);
332 struct fc_rport *rport = starget_to_rport(starget);
333
334 /*
335 * if parent is remote port, use values from remote port.
336 * Otherwise, this host uses the fc_transport, but not the
337 * remote port interface. As such, initialize to known non-values.
338 */
339 if (rport) {
340 fc_starget_node_name(starget) = rport->node_name;
341 fc_starget_port_name(starget) = rport->port_name;
342 fc_starget_port_id(starget) = rport->port_id;
343 } else {
344 fc_starget_node_name(starget) = -1;
345 fc_starget_port_name(starget) = -1;
346 fc_starget_port_id(starget) = -1;
347 }
348
349 return 0;
350}
351
352static DECLARE_TRANSPORT_CLASS(fc_transport_class,
353 "fc_transport",
354 fc_target_setup,
355 NULL,
356 NULL);
357
James Bottomleyd0a7e572005-08-14 17:09:01 -0500358static int fc_host_setup(struct transport_container *tc, struct device *dev,
Tony Jonesee959b02008-02-22 00:13:36 +0100359 struct device *cdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360{
361 struct Scsi_Host *shost = dev_to_shost(dev);
James Smartaedf3492006-04-10 10:14:05 -0400362 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700363
James Smart9ef3e4a2007-05-24 19:04:44 -0400364 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700365 * Set default values easily detected by the midlayer as
366 * failure cases. The scsi lldd is responsible for initializing
367 * all transport attributes to valid values per host.
368 */
James Smartaedf3492006-04-10 10:14:05 -0400369 fc_host->node_name = -1;
370 fc_host->port_name = -1;
371 fc_host->permanent_port_name = -1;
372 fc_host->supported_classes = FC_COS_UNSPECIFIED;
373 memset(fc_host->supported_fc4s, 0,
374 sizeof(fc_host->supported_fc4s));
James Smartaedf3492006-04-10 10:14:05 -0400375 fc_host->supported_speeds = FC_PORTSPEED_UNKNOWN;
376 fc_host->maxframe_size = -1;
James Smarta53eb5e2007-04-27 12:41:09 -0400377 fc_host->max_npiv_vports = 0;
James Smartaedf3492006-04-10 10:14:05 -0400378 memset(fc_host->serial_number, 0,
379 sizeof(fc_host->serial_number));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700380
James Smartaedf3492006-04-10 10:14:05 -0400381 fc_host->port_id = -1;
382 fc_host->port_type = FC_PORTTYPE_UNKNOWN;
383 fc_host->port_state = FC_PORTSTATE_UNKNOWN;
384 memset(fc_host->active_fc4s, 0,
385 sizeof(fc_host->active_fc4s));
386 fc_host->speed = FC_PORTSPEED_UNKNOWN;
387 fc_host->fabric_name = -1;
James Smartb8d08212006-08-17 08:00:43 -0400388 memset(fc_host->symbolic_name, 0, sizeof(fc_host->symbolic_name));
389 memset(fc_host->system_hostname, 0, sizeof(fc_host->system_hostname));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700390
James Smartaedf3492006-04-10 10:14:05 -0400391 fc_host->tgtid_bind_type = FC_TGTID_BIND_BY_WWPN;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700392
James Smartaedf3492006-04-10 10:14:05 -0400393 INIT_LIST_HEAD(&fc_host->rports);
394 INIT_LIST_HEAD(&fc_host->rport_bindings);
James Smarta53eb5e2007-04-27 12:41:09 -0400395 INIT_LIST_HEAD(&fc_host->vports);
James Smartaedf3492006-04-10 10:14:05 -0400396 fc_host->next_rport_number = 0;
397 fc_host->next_target_id = 0;
James Smarta53eb5e2007-04-27 12:41:09 -0400398 fc_host->next_vport_number = 0;
399 fc_host->npiv_vports_inuse = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700400
Kay Sieversaab0de22008-05-02 06:02:41 +0200401 snprintf(fc_host->work_q_name, sizeof(fc_host->work_q_name),
402 "fc_wq_%d", shost->host_no);
James Smartaedf3492006-04-10 10:14:05 -0400403 fc_host->work_q = create_singlethread_workqueue(
404 fc_host->work_q_name);
405 if (!fc_host->work_q)
406 return -ENOMEM;
407
Kay Sieversaab0de22008-05-02 06:02:41 +0200408 snprintf(fc_host->devloss_work_q_name,
409 sizeof(fc_host->devloss_work_q_name),
410 "fc_dl_%d", shost->host_no);
James Smartaedf3492006-04-10 10:14:05 -0400411 fc_host->devloss_work_q = create_singlethread_workqueue(
412 fc_host->devloss_work_q_name);
413 if (!fc_host->devloss_work_q) {
414 destroy_workqueue(fc_host->work_q);
415 fc_host->work_q = NULL;
416 return -ENOMEM;
417 }
418
James Smart9e4f5e22009-03-26 13:33:19 -0400419 fc_bsg_hostadd(shost, fc_host);
420 /* ignore any bsg add error - we just can't do sgio */
421
422 return 0;
423}
424
425static int fc_host_remove(struct transport_container *tc, struct device *dev,
426 struct device *cdev)
427{
428 struct Scsi_Host *shost = dev_to_shost(dev);
429 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
430
431 fc_bsg_remove(fc_host->rqst_q);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700432 return 0;
433}
434
435static DECLARE_TRANSPORT_CLASS(fc_host_class,
436 "fc_host",
437 fc_host_setup,
James Smart9e4f5e22009-03-26 13:33:19 -0400438 fc_host_remove,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700439 NULL);
440
441/*
442 * Setup and Remove actions for remote ports are handled
443 * in the service functions below.
444 */
445static DECLARE_TRANSPORT_CLASS(fc_rport_class,
446 "fc_remote_ports",
447 NULL,
448 NULL,
449 NULL);
450
451/*
James Smarta53eb5e2007-04-27 12:41:09 -0400452 * Setup and Remove actions for virtual ports are handled
453 * in the service functions below.
454 */
455static DECLARE_TRANSPORT_CLASS(fc_vport_class,
456 "fc_vports",
457 NULL,
458 NULL,
459 NULL);
460
461/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700462 * Module Parameters
463 */
464
465/*
466 * dev_loss_tmo: the default number of seconds that the FC transport
467 * should insulate the loss of a remote port.
468 * The maximum will be capped by the value of SCSI_DEVICE_BLOCK_MAX_TIMEOUT.
469 */
James Smart1c9e16e2006-05-16 16:13:36 -0400470static unsigned int fc_dev_loss_tmo = 60; /* seconds */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700471
Masatake YAMATO10f4b892007-09-19 22:59:16 +0900472module_param_named(dev_loss_tmo, fc_dev_loss_tmo, uint, S_IRUGO|S_IWUSR);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473MODULE_PARM_DESC(dev_loss_tmo,
474 "Maximum number of seconds that the FC transport should"
475 " insulate the loss of a remote port. Once this value is"
476 " exceeded, the scsi target is removed. Value should be"
477 " between 1 and SCSI_DEVICE_BLOCK_MAX_TIMEOUT.");
478
Rob Landleyeb448202007-11-03 13:30:39 -0500479/*
James Smart84314fd2006-08-18 17:30:09 -0400480 * Netlink Infrastructure
Rob Landleyeb448202007-11-03 13:30:39 -0500481 */
James Smart84314fd2006-08-18 17:30:09 -0400482
483static atomic_t fc_event_seq;
484
485/**
486 * fc_get_event_number - Obtain the next sequential FC event number
487 *
488 * Notes:
Rob Landleyeb448202007-11-03 13:30:39 -0500489 * We could have inlined this, but it would have required fc_event_seq to
James Smart84314fd2006-08-18 17:30:09 -0400490 * be exposed. For now, live with the subroutine call.
491 * Atomic used to avoid lock/unlock...
Rob Landleyeb448202007-11-03 13:30:39 -0500492 */
James Smart84314fd2006-08-18 17:30:09 -0400493u32
494fc_get_event_number(void)
495{
496 return atomic_add_return(1, &fc_event_seq);
497}
498EXPORT_SYMBOL(fc_get_event_number);
499
500
501/**
502 * fc_host_post_event - called to post an even on an fc_host.
James Smart84314fd2006-08-18 17:30:09 -0400503 * @shost: host the event occurred on
504 * @event_number: fc event number obtained from get_fc_event_number()
505 * @event_code: fc_host event being posted
506 * @event_data: 32bits of data for the event being posted
507 *
508 * Notes:
509 * This routine assumes no locks are held on entry.
Rob Landleyeb448202007-11-03 13:30:39 -0500510 */
James Smart84314fd2006-08-18 17:30:09 -0400511void
512fc_host_post_event(struct Scsi_Host *shost, u32 event_number,
513 enum fc_host_event_code event_code, u32 event_data)
514{
515 struct sk_buff *skb;
516 struct nlmsghdr *nlh;
517 struct fc_nl_event *event;
518 const char *name;
519 u32 len, skblen;
520 int err;
521
522 if (!scsi_nl_sock) {
523 err = -ENOENT;
524 goto send_fail;
525 }
526
527 len = FC_NL_MSGALIGN(sizeof(*event));
528 skblen = NLMSG_SPACE(len);
529
530 skb = alloc_skb(skblen, GFP_KERNEL);
531 if (!skb) {
532 err = -ENOBUFS;
533 goto send_fail;
534 }
535
536 nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG,
537 skblen - sizeof(*nlh), 0);
538 if (!nlh) {
539 err = -ENOBUFS;
540 goto send_fail_skb;
541 }
542 event = NLMSG_DATA(nlh);
543
544 INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC,
545 FC_NL_ASYNC_EVENT, len);
546 event->seconds = get_seconds();
547 event->vendor_id = 0;
548 event->host_no = shost->host_no;
549 event->event_datalen = sizeof(u32); /* bytes */
550 event->event_num = event_number;
551 event->event_code = event_code;
552 event->event_data = event_data;
553
Pablo Neira Ayusoff491a72009-02-05 23:56:36 -0800554 nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS,
555 GFP_KERNEL);
James Smart84314fd2006-08-18 17:30:09 -0400556 return;
557
558send_fail_skb:
559 kfree_skb(skb);
560send_fail:
561 name = get_fc_host_event_code_name(event_code);
562 printk(KERN_WARNING
563 "%s: Dropped Event : host %d %s data 0x%08x - err %d\n",
Harvey Harrisoncadbd4a2008-07-03 23:47:27 -0700564 __func__, shost->host_no,
James Smart84314fd2006-08-18 17:30:09 -0400565 (name) ? name : "<unknown>", event_data, err);
566 return;
567}
568EXPORT_SYMBOL(fc_host_post_event);
569
570
571/**
Rob Landleyeb448202007-11-03 13:30:39 -0500572 * fc_host_post_vendor_event - called to post a vendor unique event on an fc_host
James Smart84314fd2006-08-18 17:30:09 -0400573 * @shost: host the event occurred on
574 * @event_number: fc event number obtained from get_fc_event_number()
575 * @data_len: amount, in bytes, of vendor unique data
576 * @data_buf: pointer to vendor unique data
Rob Landleyeb448202007-11-03 13:30:39 -0500577 * @vendor_id: Vendor id
James Smart84314fd2006-08-18 17:30:09 -0400578 *
579 * Notes:
580 * This routine assumes no locks are held on entry.
Rob Landleyeb448202007-11-03 13:30:39 -0500581 */
James Smart84314fd2006-08-18 17:30:09 -0400582void
583fc_host_post_vendor_event(struct Scsi_Host *shost, u32 event_number,
James Smartf14e2e22006-08-22 09:55:23 -0400584 u32 data_len, char * data_buf, u64 vendor_id)
James Smart84314fd2006-08-18 17:30:09 -0400585{
586 struct sk_buff *skb;
587 struct nlmsghdr *nlh;
588 struct fc_nl_event *event;
589 u32 len, skblen;
590 int err;
591
592 if (!scsi_nl_sock) {
593 err = -ENOENT;
594 goto send_vendor_fail;
595 }
596
597 len = FC_NL_MSGALIGN(sizeof(*event) + data_len);
598 skblen = NLMSG_SPACE(len);
599
600 skb = alloc_skb(skblen, GFP_KERNEL);
601 if (!skb) {
602 err = -ENOBUFS;
603 goto send_vendor_fail;
604 }
605
606 nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG,
607 skblen - sizeof(*nlh), 0);
608 if (!nlh) {
609 err = -ENOBUFS;
610 goto send_vendor_fail_skb;
611 }
612 event = NLMSG_DATA(nlh);
613
614 INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC,
615 FC_NL_ASYNC_EVENT, len);
616 event->seconds = get_seconds();
617 event->vendor_id = vendor_id;
618 event->host_no = shost->host_no;
619 event->event_datalen = data_len; /* bytes */
620 event->event_num = event_number;
621 event->event_code = FCH_EVT_VENDOR_UNIQUE;
622 memcpy(&event->event_data, data_buf, data_len);
623
Pablo Neira Ayusoff491a72009-02-05 23:56:36 -0800624 nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS,
625 GFP_KERNEL);
James Smart84314fd2006-08-18 17:30:09 -0400626 return;
627
628send_vendor_fail_skb:
629 kfree_skb(skb);
630send_vendor_fail:
631 printk(KERN_WARNING
632 "%s: Dropped Event : host %d vendor_unique - err %d\n",
Harvey Harrisoncadbd4a2008-07-03 23:47:27 -0700633 __func__, shost->host_no, err);
James Smart84314fd2006-08-18 17:30:09 -0400634 return;
635}
636EXPORT_SYMBOL(fc_host_post_vendor_event);
637
638
Linus Torvalds1da177e2005-04-16 15:20:36 -0700639
640static __init int fc_transport_init(void)
641{
James Smart84314fd2006-08-18 17:30:09 -0400642 int error;
643
644 atomic_set(&fc_event_seq, 0);
645
646 error = transport_class_register(&fc_host_class);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700647 if (error)
648 return error;
James Smarta53eb5e2007-04-27 12:41:09 -0400649 error = transport_class_register(&fc_vport_class);
650 if (error)
651 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700652 error = transport_class_register(&fc_rport_class);
653 if (error)
654 return error;
655 return transport_class_register(&fc_transport_class);
656}
657
658static void __exit fc_transport_exit(void)
659{
660 transport_class_unregister(&fc_transport_class);
661 transport_class_unregister(&fc_rport_class);
662 transport_class_unregister(&fc_host_class);
James Smarta53eb5e2007-04-27 12:41:09 -0400663 transport_class_unregister(&fc_vport_class);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700664}
665
666/*
667 * FC Remote Port Attribute Management
668 */
669
670#define fc_rport_show_function(field, format_string, sz, cast) \
671static ssize_t \
Tony Jonesee959b02008-02-22 00:13:36 +0100672show_fc_rport_##field (struct device *dev, \
673 struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700674{ \
Tony Jonesee959b02008-02-22 00:13:36 +0100675 struct fc_rport *rport = transport_class_to_rport(dev); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700676 struct Scsi_Host *shost = rport_to_shost(rport); \
677 struct fc_internal *i = to_fc_internal(shost->transportt); \
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -0400678 if ((i->f->get_rport_##field) && \
679 !((rport->port_state == FC_PORTSTATE_BLOCKED) || \
James.Smart@Emulex.Com42e33142005-12-15 09:56:22 -0500680 (rport->port_state == FC_PORTSTATE_DELETED) || \
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -0400681 (rport->port_state == FC_PORTSTATE_NOTPRESENT))) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700682 i->f->get_rport_##field(rport); \
683 return snprintf(buf, sz, format_string, cast rport->field); \
684}
685
686#define fc_rport_store_function(field) \
687static ssize_t \
Tony Jonesee959b02008-02-22 00:13:36 +0100688store_fc_rport_##field(struct device *dev, \
689 struct device_attribute *attr, \
690 const char *buf, size_t count) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700691{ \
692 int val; \
Tony Jonesee959b02008-02-22 00:13:36 +0100693 struct fc_rport *rport = transport_class_to_rport(dev); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700694 struct Scsi_Host *shost = rport_to_shost(rport); \
695 struct fc_internal *i = to_fc_internal(shost->transportt); \
James Smart0f29b962006-08-18 17:33:29 -0400696 char *cp; \
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -0400697 if ((rport->port_state == FC_PORTSTATE_BLOCKED) || \
James.Smart@Emulex.Com42e33142005-12-15 09:56:22 -0500698 (rport->port_state == FC_PORTSTATE_DELETED) || \
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -0400699 (rport->port_state == FC_PORTSTATE_NOTPRESENT)) \
700 return -EBUSY; \
James Smart0f29b962006-08-18 17:33:29 -0400701 val = simple_strtoul(buf, &cp, 0); \
702 if (*cp && (*cp != '\n')) \
703 return -EINVAL; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700704 i->f->set_rport_##field(rport, val); \
705 return count; \
706}
707
708#define fc_rport_rd_attr(field, format_string, sz) \
709 fc_rport_show_function(field, format_string, sz, ) \
Tony Jonesee959b02008-02-22 00:13:36 +0100710static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700711 show_fc_rport_##field, NULL)
712
713#define fc_rport_rd_attr_cast(field, format_string, sz, cast) \
714 fc_rport_show_function(field, format_string, sz, (cast)) \
Tony Jonesee959b02008-02-22 00:13:36 +0100715static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700716 show_fc_rport_##field, NULL)
717
718#define fc_rport_rw_attr(field, format_string, sz) \
719 fc_rport_show_function(field, format_string, sz, ) \
720 fc_rport_store_function(field) \
Tony Jonesee959b02008-02-22 00:13:36 +0100721static FC_DEVICE_ATTR(rport, field, S_IRUGO | S_IWUSR, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700722 show_fc_rport_##field, \
723 store_fc_rport_##field)
724
725
726#define fc_private_rport_show_function(field, format_string, sz, cast) \
727static ssize_t \
Tony Jonesee959b02008-02-22 00:13:36 +0100728show_fc_rport_##field (struct device *dev, \
729 struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700730{ \
Tony Jonesee959b02008-02-22 00:13:36 +0100731 struct fc_rport *rport = transport_class_to_rport(dev); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700732 return snprintf(buf, sz, format_string, cast rport->field); \
733}
734
735#define fc_private_rport_rd_attr(field, format_string, sz) \
736 fc_private_rport_show_function(field, format_string, sz, ) \
Tony Jonesee959b02008-02-22 00:13:36 +0100737static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700738 show_fc_rport_##field, NULL)
739
740#define fc_private_rport_rd_attr_cast(field, format_string, sz, cast) \
741 fc_private_rport_show_function(field, format_string, sz, (cast)) \
Tony Jonesee959b02008-02-22 00:13:36 +0100742static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700743 show_fc_rport_##field, NULL)
744
745
746#define fc_private_rport_rd_enum_attr(title, maxlen) \
747static ssize_t \
Tony Jonesee959b02008-02-22 00:13:36 +0100748show_fc_rport_##title (struct device *dev, \
749 struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700750{ \
Tony Jonesee959b02008-02-22 00:13:36 +0100751 struct fc_rport *rport = transport_class_to_rport(dev); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700752 const char *name; \
753 name = get_fc_##title##_name(rport->title); \
754 if (!name) \
755 return -EINVAL; \
756 return snprintf(buf, maxlen, "%s\n", name); \
757} \
Tony Jonesee959b02008-02-22 00:13:36 +0100758static FC_DEVICE_ATTR(rport, title, S_IRUGO, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700759 show_fc_rport_##title, NULL)
760
761
762#define SETUP_RPORT_ATTRIBUTE_RD(field) \
Tony Jonesee959b02008-02-22 00:13:36 +0100763 i->private_rport_attrs[count] = device_attr_rport_##field; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700764 i->private_rport_attrs[count].attr.mode = S_IRUGO; \
765 i->private_rport_attrs[count].store = NULL; \
766 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
767 if (i->f->show_rport_##field) \
768 count++
769
770#define SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(field) \
Tony Jonesee959b02008-02-22 00:13:36 +0100771 i->private_rport_attrs[count] = device_attr_rport_##field; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700772 i->private_rport_attrs[count].attr.mode = S_IRUGO; \
773 i->private_rport_attrs[count].store = NULL; \
774 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
775 count++
776
777#define SETUP_RPORT_ATTRIBUTE_RW(field) \
Tony Jonesee959b02008-02-22 00:13:36 +0100778 i->private_rport_attrs[count] = device_attr_rport_##field; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700779 if (!i->f->set_rport_##field) { \
780 i->private_rport_attrs[count].attr.mode = S_IRUGO; \
781 i->private_rport_attrs[count].store = NULL; \
782 } \
783 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
784 if (i->f->show_rport_##field) \
785 count++
786
James Smart0f29b962006-08-18 17:33:29 -0400787#define SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(field) \
788{ \
Tony Jonesee959b02008-02-22 00:13:36 +0100789 i->private_rport_attrs[count] = device_attr_rport_##field; \
James Smart0f29b962006-08-18 17:33:29 -0400790 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
791 count++; \
792}
793
Linus Torvalds1da177e2005-04-16 15:20:36 -0700794
795/* The FC Transport Remote Port Attributes: */
796
797/* Fixed Remote Port Attributes */
798
799fc_private_rport_rd_attr(maxframe_size, "%u bytes\n", 20);
800
801static ssize_t
Tony Jonesee959b02008-02-22 00:13:36 +0100802show_fc_rport_supported_classes (struct device *dev,
803 struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700804{
Tony Jonesee959b02008-02-22 00:13:36 +0100805 struct fc_rport *rport = transport_class_to_rport(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700806 if (rport->supported_classes == FC_COS_UNSPECIFIED)
807 return snprintf(buf, 20, "unspecified\n");
808 return get_fc_cos_names(rport->supported_classes, buf);
809}
Tony Jonesee959b02008-02-22 00:13:36 +0100810static FC_DEVICE_ATTR(rport, supported_classes, S_IRUGO,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700811 show_fc_rport_supported_classes, NULL);
812
813/* Dynamic Remote Port Attributes */
814
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -0400815/*
816 * dev_loss_tmo attribute
817 */
818fc_rport_show_function(dev_loss_tmo, "%d\n", 20, )
819static ssize_t
Tony Jonesee959b02008-02-22 00:13:36 +0100820store_fc_rport_dev_loss_tmo(struct device *dev, struct device_attribute *attr,
821 const char *buf, size_t count)
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -0400822{
823 int val;
Tony Jonesee959b02008-02-22 00:13:36 +0100824 struct fc_rport *rport = transport_class_to_rport(dev);
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -0400825 struct Scsi_Host *shost = rport_to_shost(rport);
826 struct fc_internal *i = to_fc_internal(shost->transportt);
James Smart0f29b962006-08-18 17:33:29 -0400827 char *cp;
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -0400828 if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||
James.Smart@Emulex.Com42e33142005-12-15 09:56:22 -0500829 (rport->port_state == FC_PORTSTATE_DELETED) ||
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -0400830 (rport->port_state == FC_PORTSTATE_NOTPRESENT))
831 return -EBUSY;
James Smart0f29b962006-08-18 17:33:29 -0400832 val = simple_strtoul(buf, &cp, 0);
833 if ((*cp && (*cp != '\n')) ||
834 (val < 0) || (val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT))
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -0400835 return -EINVAL;
836 i->f->set_rport_dev_loss_tmo(rport, val);
837 return count;
838}
Tony Jonesee959b02008-02-22 00:13:36 +0100839static FC_DEVICE_ATTR(rport, dev_loss_tmo, S_IRUGO | S_IWUSR,
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -0400840 show_fc_rport_dev_loss_tmo, store_fc_rport_dev_loss_tmo);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700841
842
843/* Private Remote Port Attributes */
844
845fc_private_rport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
846fc_private_rport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
847fc_private_rport_rd_attr(port_id, "0x%06x\n", 20);
848
849static ssize_t
Tony Jonesee959b02008-02-22 00:13:36 +0100850show_fc_rport_roles (struct device *dev, struct device_attribute *attr,
851 char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700852{
Tony Jonesee959b02008-02-22 00:13:36 +0100853 struct fc_rport *rport = transport_class_to_rport(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700854
855 /* identify any roles that are port_id specific */
856 if ((rport->port_id != -1) &&
857 (rport->port_id & FC_WELLKNOWN_PORTID_MASK) ==
858 FC_WELLKNOWN_PORTID_MASK) {
859 switch (rport->port_id & FC_WELLKNOWN_ROLE_MASK) {
860 case FC_FPORT_PORTID:
861 return snprintf(buf, 30, "Fabric Port\n");
862 case FC_FABCTLR_PORTID:
863 return snprintf(buf, 30, "Fabric Controller\n");
864 case FC_DIRSRVR_PORTID:
865 return snprintf(buf, 30, "Directory Server\n");
866 case FC_TIMESRVR_PORTID:
867 return snprintf(buf, 30, "Time Server\n");
868 case FC_MGMTSRVR_PORTID:
869 return snprintf(buf, 30, "Management Server\n");
870 default:
871 return snprintf(buf, 30, "Unknown Fabric Entity\n");
872 }
873 } else {
James Smarta53eb5e2007-04-27 12:41:09 -0400874 if (rport->roles == FC_PORT_ROLE_UNKNOWN)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700875 return snprintf(buf, 20, "unknown\n");
James Smarta53eb5e2007-04-27 12:41:09 -0400876 return get_fc_port_roles_names(rport->roles, buf);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700877 }
878}
Tony Jonesee959b02008-02-22 00:13:36 +0100879static FC_DEVICE_ATTR(rport, roles, S_IRUGO,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700880 show_fc_rport_roles, NULL);
881
882fc_private_rport_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN);
883fc_private_rport_rd_attr(scsi_target_id, "%d\n", 20);
884
James Smart0f29b962006-08-18 17:33:29 -0400885/*
886 * fast_io_fail_tmo attribute
887 */
888static ssize_t
Tony Jonesee959b02008-02-22 00:13:36 +0100889show_fc_rport_fast_io_fail_tmo (struct device *dev,
890 struct device_attribute *attr, char *buf)
James Smart0f29b962006-08-18 17:33:29 -0400891{
Tony Jonesee959b02008-02-22 00:13:36 +0100892 struct fc_rport *rport = transport_class_to_rport(dev);
James Smart0f29b962006-08-18 17:33:29 -0400893
894 if (rport->fast_io_fail_tmo == -1)
895 return snprintf(buf, 5, "off\n");
896 return snprintf(buf, 20, "%d\n", rport->fast_io_fail_tmo);
897}
898
899static ssize_t
Tony Jonesee959b02008-02-22 00:13:36 +0100900store_fc_rport_fast_io_fail_tmo(struct device *dev,
901 struct device_attribute *attr, const char *buf,
902 size_t count)
James Smart0f29b962006-08-18 17:33:29 -0400903{
904 int val;
905 char *cp;
Tony Jonesee959b02008-02-22 00:13:36 +0100906 struct fc_rport *rport = transport_class_to_rport(dev);
James Smart0f29b962006-08-18 17:33:29 -0400907
908 if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||
909 (rport->port_state == FC_PORTSTATE_DELETED) ||
910 (rport->port_state == FC_PORTSTATE_NOTPRESENT))
911 return -EBUSY;
912 if (strncmp(buf, "off", 3) == 0)
913 rport->fast_io_fail_tmo = -1;
914 else {
915 val = simple_strtoul(buf, &cp, 0);
916 if ((*cp && (*cp != '\n')) ||
917 (val < 0) || (val >= rport->dev_loss_tmo))
918 return -EINVAL;
919 rport->fast_io_fail_tmo = val;
920 }
921 return count;
922}
Tony Jonesee959b02008-02-22 00:13:36 +0100923static FC_DEVICE_ATTR(rport, fast_io_fail_tmo, S_IRUGO | S_IWUSR,
James Smart0f29b962006-08-18 17:33:29 -0400924 show_fc_rport_fast_io_fail_tmo, store_fc_rport_fast_io_fail_tmo);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700925
926
927/*
928 * FC SCSI Target Attribute Management
929 */
930
931/*
932 * Note: in the target show function we recognize when the remote
James Smarta53eb5e2007-04-27 12:41:09 -0400933 * port is in the heirarchy and do not allow the driver to get
Linus Torvalds1da177e2005-04-16 15:20:36 -0700934 * involved in sysfs functions. The driver only gets involved if
935 * it's the "old" style that doesn't use rports.
936 */
937#define fc_starget_show_function(field, format_string, sz, cast) \
938static ssize_t \
Tony Jonesee959b02008-02-22 00:13:36 +0100939show_fc_starget_##field (struct device *dev, \
940 struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700941{ \
Tony Jonesee959b02008-02-22 00:13:36 +0100942 struct scsi_target *starget = transport_class_to_starget(dev); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700943 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \
944 struct fc_internal *i = to_fc_internal(shost->transportt); \
945 struct fc_rport *rport = starget_to_rport(starget); \
946 if (rport) \
947 fc_starget_##field(starget) = rport->field; \
948 else if (i->f->get_starget_##field) \
949 i->f->get_starget_##field(starget); \
950 return snprintf(buf, sz, format_string, \
951 cast fc_starget_##field(starget)); \
952}
953
954#define fc_starget_rd_attr(field, format_string, sz) \
955 fc_starget_show_function(field, format_string, sz, ) \
Tony Jonesee959b02008-02-22 00:13:36 +0100956static FC_DEVICE_ATTR(starget, field, S_IRUGO, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700957 show_fc_starget_##field, NULL)
958
959#define fc_starget_rd_attr_cast(field, format_string, sz, cast) \
960 fc_starget_show_function(field, format_string, sz, (cast)) \
Tony Jonesee959b02008-02-22 00:13:36 +0100961static FC_DEVICE_ATTR(starget, field, S_IRUGO, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700962 show_fc_starget_##field, NULL)
963
964#define SETUP_STARGET_ATTRIBUTE_RD(field) \
Tony Jonesee959b02008-02-22 00:13:36 +0100965 i->private_starget_attrs[count] = device_attr_starget_##field; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700966 i->private_starget_attrs[count].attr.mode = S_IRUGO; \
967 i->private_starget_attrs[count].store = NULL; \
968 i->starget_attrs[count] = &i->private_starget_attrs[count]; \
969 if (i->f->show_starget_##field) \
970 count++
971
972#define SETUP_STARGET_ATTRIBUTE_RW(field) \
Tony Jonesee959b02008-02-22 00:13:36 +0100973 i->private_starget_attrs[count] = device_attr_starget_##field; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700974 if (!i->f->set_starget_##field) { \
975 i->private_starget_attrs[count].attr.mode = S_IRUGO; \
976 i->private_starget_attrs[count].store = NULL; \
977 } \
978 i->starget_attrs[count] = &i->private_starget_attrs[count]; \
979 if (i->f->show_starget_##field) \
980 count++
981
982/* The FC Transport SCSI Target Attributes: */
983fc_starget_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
984fc_starget_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
985fc_starget_rd_attr(port_id, "0x%06x\n", 20);
986
987
988/*
James Smarta53eb5e2007-04-27 12:41:09 -0400989 * FC Virtual Port Attribute Management
990 */
991
992#define fc_vport_show_function(field, format_string, sz, cast) \
993static ssize_t \
Tony Jonesee959b02008-02-22 00:13:36 +0100994show_fc_vport_##field (struct device *dev, \
995 struct device_attribute *attr, char *buf) \
James Smarta53eb5e2007-04-27 12:41:09 -0400996{ \
Tony Jonesee959b02008-02-22 00:13:36 +0100997 struct fc_vport *vport = transport_class_to_vport(dev); \
James Smarta53eb5e2007-04-27 12:41:09 -0400998 struct Scsi_Host *shost = vport_to_shost(vport); \
999 struct fc_internal *i = to_fc_internal(shost->transportt); \
1000 if ((i->f->get_vport_##field) && \
1001 !(vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))) \
1002 i->f->get_vport_##field(vport); \
1003 return snprintf(buf, sz, format_string, cast vport->field); \
1004}
1005
1006#define fc_vport_store_function(field) \
1007static ssize_t \
Tony Jonesee959b02008-02-22 00:13:36 +01001008store_fc_vport_##field(struct device *dev, \
1009 struct device_attribute *attr, \
1010 const char *buf, size_t count) \
James Smarta53eb5e2007-04-27 12:41:09 -04001011{ \
1012 int val; \
Tony Jonesee959b02008-02-22 00:13:36 +01001013 struct fc_vport *vport = transport_class_to_vport(dev); \
James Smarta53eb5e2007-04-27 12:41:09 -04001014 struct Scsi_Host *shost = vport_to_shost(vport); \
1015 struct fc_internal *i = to_fc_internal(shost->transportt); \
1016 char *cp; \
1017 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \
1018 return -EBUSY; \
1019 val = simple_strtoul(buf, &cp, 0); \
1020 if (*cp && (*cp != '\n')) \
1021 return -EINVAL; \
1022 i->f->set_vport_##field(vport, val); \
1023 return count; \
1024}
1025
1026#define fc_vport_store_str_function(field, slen) \
1027static ssize_t \
Tony Jonesee959b02008-02-22 00:13:36 +01001028store_fc_vport_##field(struct device *dev, \
1029 struct device_attribute *attr, \
1030 const char *buf, size_t count) \
James Smarta53eb5e2007-04-27 12:41:09 -04001031{ \
Tony Jonesee959b02008-02-22 00:13:36 +01001032 struct fc_vport *vport = transport_class_to_vport(dev); \
James Smarta53eb5e2007-04-27 12:41:09 -04001033 struct Scsi_Host *shost = vport_to_shost(vport); \
1034 struct fc_internal *i = to_fc_internal(shost->transportt); \
1035 unsigned int cnt=count; \
1036 \
1037 /* count may include a LF at end of string */ \
1038 if (buf[cnt-1] == '\n') \
1039 cnt--; \
1040 if (cnt > ((slen) - 1)) \
1041 return -EINVAL; \
1042 memcpy(vport->field, buf, cnt); \
1043 i->f->set_vport_##field(vport); \
1044 return count; \
1045}
1046
1047#define fc_vport_rd_attr(field, format_string, sz) \
1048 fc_vport_show_function(field, format_string, sz, ) \
Tony Jonesee959b02008-02-22 00:13:36 +01001049static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
James Smarta53eb5e2007-04-27 12:41:09 -04001050 show_fc_vport_##field, NULL)
1051
1052#define fc_vport_rd_attr_cast(field, format_string, sz, cast) \
1053 fc_vport_show_function(field, format_string, sz, (cast)) \
Tony Jonesee959b02008-02-22 00:13:36 +01001054static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
James Smarta53eb5e2007-04-27 12:41:09 -04001055 show_fc_vport_##field, NULL)
1056
1057#define fc_vport_rw_attr(field, format_string, sz) \
1058 fc_vport_show_function(field, format_string, sz, ) \
1059 fc_vport_store_function(field) \
Tony Jonesee959b02008-02-22 00:13:36 +01001060static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \
James Smarta53eb5e2007-04-27 12:41:09 -04001061 show_fc_vport_##field, \
1062 store_fc_vport_##field)
1063
1064#define fc_private_vport_show_function(field, format_string, sz, cast) \
1065static ssize_t \
Tony Jonesee959b02008-02-22 00:13:36 +01001066show_fc_vport_##field (struct device *dev, \
1067 struct device_attribute *attr, char *buf) \
James Smarta53eb5e2007-04-27 12:41:09 -04001068{ \
Tony Jonesee959b02008-02-22 00:13:36 +01001069 struct fc_vport *vport = transport_class_to_vport(dev); \
James Smarta53eb5e2007-04-27 12:41:09 -04001070 return snprintf(buf, sz, format_string, cast vport->field); \
1071}
1072
1073#define fc_private_vport_store_u32_function(field) \
1074static ssize_t \
Tony Jonesee959b02008-02-22 00:13:36 +01001075store_fc_vport_##field(struct device *dev, \
1076 struct device_attribute *attr, \
1077 const char *buf, size_t count) \
James Smarta53eb5e2007-04-27 12:41:09 -04001078{ \
1079 u32 val; \
Tony Jonesee959b02008-02-22 00:13:36 +01001080 struct fc_vport *vport = transport_class_to_vport(dev); \
James Smarta53eb5e2007-04-27 12:41:09 -04001081 char *cp; \
1082 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \
1083 return -EBUSY; \
1084 val = simple_strtoul(buf, &cp, 0); \
1085 if (*cp && (*cp != '\n')) \
1086 return -EINVAL; \
1087 vport->field = val; \
1088 return count; \
1089}
1090
1091
1092#define fc_private_vport_rd_attr(field, format_string, sz) \
1093 fc_private_vport_show_function(field, format_string, sz, ) \
Tony Jonesee959b02008-02-22 00:13:36 +01001094static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
James Smarta53eb5e2007-04-27 12:41:09 -04001095 show_fc_vport_##field, NULL)
1096
1097#define fc_private_vport_rd_attr_cast(field, format_string, sz, cast) \
1098 fc_private_vport_show_function(field, format_string, sz, (cast)) \
Tony Jonesee959b02008-02-22 00:13:36 +01001099static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
James Smarta53eb5e2007-04-27 12:41:09 -04001100 show_fc_vport_##field, NULL)
1101
1102#define fc_private_vport_rw_u32_attr(field, format_string, sz) \
1103 fc_private_vport_show_function(field, format_string, sz, ) \
1104 fc_private_vport_store_u32_function(field) \
Tony Jonesee959b02008-02-22 00:13:36 +01001105static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \
James Smarta53eb5e2007-04-27 12:41:09 -04001106 show_fc_vport_##field, \
1107 store_fc_vport_##field)
1108
1109
1110#define fc_private_vport_rd_enum_attr(title, maxlen) \
1111static ssize_t \
Tony Jonesee959b02008-02-22 00:13:36 +01001112show_fc_vport_##title (struct device *dev, \
1113 struct device_attribute *attr, \
1114 char *buf) \
James Smarta53eb5e2007-04-27 12:41:09 -04001115{ \
Tony Jonesee959b02008-02-22 00:13:36 +01001116 struct fc_vport *vport = transport_class_to_vport(dev); \
James Smarta53eb5e2007-04-27 12:41:09 -04001117 const char *name; \
1118 name = get_fc_##title##_name(vport->title); \
1119 if (!name) \
1120 return -EINVAL; \
1121 return snprintf(buf, maxlen, "%s\n", name); \
1122} \
Tony Jonesee959b02008-02-22 00:13:36 +01001123static FC_DEVICE_ATTR(vport, title, S_IRUGO, \
James Smarta53eb5e2007-04-27 12:41:09 -04001124 show_fc_vport_##title, NULL)
1125
1126
1127#define SETUP_VPORT_ATTRIBUTE_RD(field) \
Tony Jonesee959b02008-02-22 00:13:36 +01001128 i->private_vport_attrs[count] = device_attr_vport_##field; \
James Smarta53eb5e2007-04-27 12:41:09 -04001129 i->private_vport_attrs[count].attr.mode = S_IRUGO; \
1130 i->private_vport_attrs[count].store = NULL; \
1131 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1132 if (i->f->get_##field) \
1133 count++
1134 /* NOTE: Above MACRO differs: checks function not show bit */
1135
1136#define SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(field) \
Tony Jonesee959b02008-02-22 00:13:36 +01001137 i->private_vport_attrs[count] = device_attr_vport_##field; \
James Smarta53eb5e2007-04-27 12:41:09 -04001138 i->private_vport_attrs[count].attr.mode = S_IRUGO; \
1139 i->private_vport_attrs[count].store = NULL; \
1140 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1141 count++
1142
1143#define SETUP_VPORT_ATTRIBUTE_WR(field) \
Tony Jonesee959b02008-02-22 00:13:36 +01001144 i->private_vport_attrs[count] = device_attr_vport_##field; \
James Smarta53eb5e2007-04-27 12:41:09 -04001145 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1146 if (i->f->field) \
1147 count++
1148 /* NOTE: Above MACRO differs: checks function */
1149
1150#define SETUP_VPORT_ATTRIBUTE_RW(field) \
Tony Jonesee959b02008-02-22 00:13:36 +01001151 i->private_vport_attrs[count] = device_attr_vport_##field; \
James Smarta53eb5e2007-04-27 12:41:09 -04001152 if (!i->f->set_vport_##field) { \
1153 i->private_vport_attrs[count].attr.mode = S_IRUGO; \
1154 i->private_vport_attrs[count].store = NULL; \
1155 } \
1156 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1157 count++
1158 /* NOTE: Above MACRO differs: does not check show bit */
1159
1160#define SETUP_PRIVATE_VPORT_ATTRIBUTE_RW(field) \
1161{ \
Tony Jonesee959b02008-02-22 00:13:36 +01001162 i->private_vport_attrs[count] = device_attr_vport_##field; \
James Smarta53eb5e2007-04-27 12:41:09 -04001163 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1164 count++; \
1165}
1166
1167
1168/* The FC Transport Virtual Port Attributes: */
1169
1170/* Fixed Virtual Port Attributes */
1171
1172/* Dynamic Virtual Port Attributes */
1173
1174/* Private Virtual Port Attributes */
1175
1176fc_private_vport_rd_enum_attr(vport_state, FC_VPORTSTATE_MAX_NAMELEN);
1177fc_private_vport_rd_enum_attr(vport_last_state, FC_VPORTSTATE_MAX_NAMELEN);
1178fc_private_vport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1179fc_private_vport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
1180
1181static ssize_t
Tony Jonesee959b02008-02-22 00:13:36 +01001182show_fc_vport_roles (struct device *dev, struct device_attribute *attr,
1183 char *buf)
James Smarta53eb5e2007-04-27 12:41:09 -04001184{
Tony Jonesee959b02008-02-22 00:13:36 +01001185 struct fc_vport *vport = transport_class_to_vport(dev);
James Smarta53eb5e2007-04-27 12:41:09 -04001186
1187 if (vport->roles == FC_PORT_ROLE_UNKNOWN)
1188 return snprintf(buf, 20, "unknown\n");
1189 return get_fc_port_roles_names(vport->roles, buf);
1190}
Tony Jonesee959b02008-02-22 00:13:36 +01001191static FC_DEVICE_ATTR(vport, roles, S_IRUGO, show_fc_vport_roles, NULL);
James Smarta53eb5e2007-04-27 12:41:09 -04001192
1193fc_private_vport_rd_enum_attr(vport_type, FC_PORTTYPE_MAX_NAMELEN);
1194
1195fc_private_vport_show_function(symbolic_name, "%s\n",
1196 FC_VPORT_SYMBOLIC_NAMELEN + 1, )
1197fc_vport_store_str_function(symbolic_name, FC_VPORT_SYMBOLIC_NAMELEN)
Tony Jonesee959b02008-02-22 00:13:36 +01001198static FC_DEVICE_ATTR(vport, symbolic_name, S_IRUGO | S_IWUSR,
James Smarta53eb5e2007-04-27 12:41:09 -04001199 show_fc_vport_symbolic_name, store_fc_vport_symbolic_name);
1200
1201static ssize_t
Tony Jonesee959b02008-02-22 00:13:36 +01001202store_fc_vport_delete(struct device *dev, struct device_attribute *attr,
1203 const char *buf, size_t count)
James Smarta53eb5e2007-04-27 12:41:09 -04001204{
Tony Jonesee959b02008-02-22 00:13:36 +01001205 struct fc_vport *vport = transport_class_to_vport(dev);
James Smart9ef3e4a2007-05-24 19:04:44 -04001206 struct Scsi_Host *shost = vport_to_shost(vport);
James Smarta53eb5e2007-04-27 12:41:09 -04001207
James Smart9ef3e4a2007-05-24 19:04:44 -04001208 fc_queue_work(shost, &vport->vport_delete_work);
James Smarta53eb5e2007-04-27 12:41:09 -04001209 return count;
1210}
Tony Jonesee959b02008-02-22 00:13:36 +01001211static FC_DEVICE_ATTR(vport, vport_delete, S_IWUSR,
James Smarta53eb5e2007-04-27 12:41:09 -04001212 NULL, store_fc_vport_delete);
1213
1214
1215/*
1216 * Enable/Disable vport
1217 * Write "1" to disable, write "0" to enable
1218 */
1219static ssize_t
Tony Jonesee959b02008-02-22 00:13:36 +01001220store_fc_vport_disable(struct device *dev, struct device_attribute *attr,
1221 const char *buf,
James Smarta53eb5e2007-04-27 12:41:09 -04001222 size_t count)
1223{
Tony Jonesee959b02008-02-22 00:13:36 +01001224 struct fc_vport *vport = transport_class_to_vport(dev);
James Smarta53eb5e2007-04-27 12:41:09 -04001225 struct Scsi_Host *shost = vport_to_shost(vport);
1226 struct fc_internal *i = to_fc_internal(shost->transportt);
1227 int stat;
1228
1229 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))
1230 return -EBUSY;
1231
1232 if (*buf == '0') {
1233 if (vport->vport_state != FC_VPORT_DISABLED)
1234 return -EALREADY;
1235 } else if (*buf == '1') {
1236 if (vport->vport_state == FC_VPORT_DISABLED)
1237 return -EALREADY;
1238 } else
1239 return -EINVAL;
1240
1241 stat = i->f->vport_disable(vport, ((*buf == '0') ? false : true));
1242 return stat ? stat : count;
1243}
Tony Jonesee959b02008-02-22 00:13:36 +01001244static FC_DEVICE_ATTR(vport, vport_disable, S_IWUSR,
James Smarta53eb5e2007-04-27 12:41:09 -04001245 NULL, store_fc_vport_disable);
1246
1247
1248/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001249 * Host Attribute Management
1250 */
1251
1252#define fc_host_show_function(field, format_string, sz, cast) \
1253static ssize_t \
Tony Jonesee959b02008-02-22 00:13:36 +01001254show_fc_host_##field (struct device *dev, \
1255 struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001256{ \
Tony Jonesee959b02008-02-22 00:13:36 +01001257 struct Scsi_Host *shost = transport_class_to_shost(dev); \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001258 struct fc_internal *i = to_fc_internal(shost->transportt); \
1259 if (i->f->get_host_##field) \
1260 i->f->get_host_##field(shost); \
1261 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
1262}
1263
1264#define fc_host_store_function(field) \
1265static ssize_t \
Tony Jonesee959b02008-02-22 00:13:36 +01001266store_fc_host_##field(struct device *dev, \
1267 struct device_attribute *attr, \
1268 const char *buf, size_t count) \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001269{ \
1270 int val; \
Tony Jonesee959b02008-02-22 00:13:36 +01001271 struct Scsi_Host *shost = transport_class_to_shost(dev); \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001272 struct fc_internal *i = to_fc_internal(shost->transportt); \
James Smart0f29b962006-08-18 17:33:29 -04001273 char *cp; \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001274 \
James Smart0f29b962006-08-18 17:33:29 -04001275 val = simple_strtoul(buf, &cp, 0); \
1276 if (*cp && (*cp != '\n')) \
1277 return -EINVAL; \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001278 i->f->set_host_##field(shost, val); \
1279 return count; \
1280}
1281
James Smartb8d08212006-08-17 08:00:43 -04001282#define fc_host_store_str_function(field, slen) \
1283static ssize_t \
Tony Jonesee959b02008-02-22 00:13:36 +01001284store_fc_host_##field(struct device *dev, \
1285 struct device_attribute *attr, \
1286 const char *buf, size_t count) \
James Smartb8d08212006-08-17 08:00:43 -04001287{ \
Tony Jonesee959b02008-02-22 00:13:36 +01001288 struct Scsi_Host *shost = transport_class_to_shost(dev); \
James Smartb8d08212006-08-17 08:00:43 -04001289 struct fc_internal *i = to_fc_internal(shost->transportt); \
1290 unsigned int cnt=count; \
1291 \
1292 /* count may include a LF at end of string */ \
1293 if (buf[cnt-1] == '\n') \
1294 cnt--; \
1295 if (cnt > ((slen) - 1)) \
1296 return -EINVAL; \
1297 memcpy(fc_host_##field(shost), buf, cnt); \
1298 i->f->set_host_##field(shost); \
1299 return count; \
1300}
1301
Linus Torvalds1da177e2005-04-16 15:20:36 -07001302#define fc_host_rd_attr(field, format_string, sz) \
1303 fc_host_show_function(field, format_string, sz, ) \
Tony Jonesee959b02008-02-22 00:13:36 +01001304static FC_DEVICE_ATTR(host, field, S_IRUGO, \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001305 show_fc_host_##field, NULL)
1306
1307#define fc_host_rd_attr_cast(field, format_string, sz, cast) \
1308 fc_host_show_function(field, format_string, sz, (cast)) \
Tony Jonesee959b02008-02-22 00:13:36 +01001309static FC_DEVICE_ATTR(host, field, S_IRUGO, \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001310 show_fc_host_##field, NULL)
1311
1312#define fc_host_rw_attr(field, format_string, sz) \
1313 fc_host_show_function(field, format_string, sz, ) \
1314 fc_host_store_function(field) \
Tony Jonesee959b02008-02-22 00:13:36 +01001315static FC_DEVICE_ATTR(host, field, S_IRUGO | S_IWUSR, \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001316 show_fc_host_##field, \
1317 store_fc_host_##field)
1318
1319#define fc_host_rd_enum_attr(title, maxlen) \
1320static ssize_t \
Tony Jonesee959b02008-02-22 00:13:36 +01001321show_fc_host_##title (struct device *dev, \
1322 struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001323{ \
Tony Jonesee959b02008-02-22 00:13:36 +01001324 struct Scsi_Host *shost = transport_class_to_shost(dev); \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001325 struct fc_internal *i = to_fc_internal(shost->transportt); \
1326 const char *name; \
1327 if (i->f->get_host_##title) \
1328 i->f->get_host_##title(shost); \
1329 name = get_fc_##title##_name(fc_host_##title(shost)); \
1330 if (!name) \
1331 return -EINVAL; \
1332 return snprintf(buf, maxlen, "%s\n", name); \
1333} \
Tony Jonesee959b02008-02-22 00:13:36 +01001334static FC_DEVICE_ATTR(host, title, S_IRUGO, show_fc_host_##title, NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001335
1336#define SETUP_HOST_ATTRIBUTE_RD(field) \
Tony Jonesee959b02008-02-22 00:13:36 +01001337 i->private_host_attrs[count] = device_attr_host_##field; \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001338 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1339 i->private_host_attrs[count].store = NULL; \
1340 i->host_attrs[count] = &i->private_host_attrs[count]; \
1341 if (i->f->show_host_##field) \
1342 count++
1343
James Smarta53eb5e2007-04-27 12:41:09 -04001344#define SETUP_HOST_ATTRIBUTE_RD_NS(field) \
Tony Jonesee959b02008-02-22 00:13:36 +01001345 i->private_host_attrs[count] = device_attr_host_##field; \
James Smarta53eb5e2007-04-27 12:41:09 -04001346 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1347 i->private_host_attrs[count].store = NULL; \
1348 i->host_attrs[count] = &i->private_host_attrs[count]; \
1349 count++
1350
Linus Torvalds1da177e2005-04-16 15:20:36 -07001351#define SETUP_HOST_ATTRIBUTE_RW(field) \
Tony Jonesee959b02008-02-22 00:13:36 +01001352 i->private_host_attrs[count] = device_attr_host_##field; \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001353 if (!i->f->set_host_##field) { \
1354 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1355 i->private_host_attrs[count].store = NULL; \
1356 } \
1357 i->host_attrs[count] = &i->private_host_attrs[count]; \
1358 if (i->f->show_host_##field) \
1359 count++
1360
1361
1362#define fc_private_host_show_function(field, format_string, sz, cast) \
1363static ssize_t \
Tony Jonesee959b02008-02-22 00:13:36 +01001364show_fc_host_##field (struct device *dev, \
1365 struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001366{ \
Tony Jonesee959b02008-02-22 00:13:36 +01001367 struct Scsi_Host *shost = transport_class_to_shost(dev); \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001368 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
1369}
1370
1371#define fc_private_host_rd_attr(field, format_string, sz) \
1372 fc_private_host_show_function(field, format_string, sz, ) \
Tony Jonesee959b02008-02-22 00:13:36 +01001373static FC_DEVICE_ATTR(host, field, S_IRUGO, \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001374 show_fc_host_##field, NULL)
1375
1376#define fc_private_host_rd_attr_cast(field, format_string, sz, cast) \
1377 fc_private_host_show_function(field, format_string, sz, (cast)) \
Tony Jonesee959b02008-02-22 00:13:36 +01001378static FC_DEVICE_ATTR(host, field, S_IRUGO, \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001379 show_fc_host_##field, NULL)
1380
1381#define SETUP_PRIVATE_HOST_ATTRIBUTE_RD(field) \
Tony Jonesee959b02008-02-22 00:13:36 +01001382 i->private_host_attrs[count] = device_attr_host_##field; \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001383 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1384 i->private_host_attrs[count].store = NULL; \
1385 i->host_attrs[count] = &i->private_host_attrs[count]; \
1386 count++
1387
1388#define SETUP_PRIVATE_HOST_ATTRIBUTE_RW(field) \
Andrew Vasquez91ca7b02005-10-27 16:03:37 -07001389{ \
Tony Jonesee959b02008-02-22 00:13:36 +01001390 i->private_host_attrs[count] = device_attr_host_##field; \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001391 i->host_attrs[count] = &i->private_host_attrs[count]; \
Andrew Vasquez91ca7b02005-10-27 16:03:37 -07001392 count++; \
1393}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001394
1395
1396/* Fixed Host Attributes */
1397
1398static ssize_t
Tony Jonesee959b02008-02-22 00:13:36 +01001399show_fc_host_supported_classes (struct device *dev,
1400 struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001401{
Tony Jonesee959b02008-02-22 00:13:36 +01001402 struct Scsi_Host *shost = transport_class_to_shost(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001403
1404 if (fc_host_supported_classes(shost) == FC_COS_UNSPECIFIED)
1405 return snprintf(buf, 20, "unspecified\n");
1406
1407 return get_fc_cos_names(fc_host_supported_classes(shost), buf);
1408}
Tony Jonesee959b02008-02-22 00:13:36 +01001409static FC_DEVICE_ATTR(host, supported_classes, S_IRUGO,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001410 show_fc_host_supported_classes, NULL);
1411
1412static ssize_t
Tony Jonesee959b02008-02-22 00:13:36 +01001413show_fc_host_supported_fc4s (struct device *dev,
1414 struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001415{
Tony Jonesee959b02008-02-22 00:13:36 +01001416 struct Scsi_Host *shost = transport_class_to_shost(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001417 return (ssize_t)show_fc_fc4s(buf, fc_host_supported_fc4s(shost));
1418}
Tony Jonesee959b02008-02-22 00:13:36 +01001419static FC_DEVICE_ATTR(host, supported_fc4s, S_IRUGO,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001420 show_fc_host_supported_fc4s, NULL);
1421
1422static ssize_t
Tony Jonesee959b02008-02-22 00:13:36 +01001423show_fc_host_supported_speeds (struct device *dev,
1424 struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001425{
Tony Jonesee959b02008-02-22 00:13:36 +01001426 struct Scsi_Host *shost = transport_class_to_shost(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001427
1428 if (fc_host_supported_speeds(shost) == FC_PORTSPEED_UNKNOWN)
1429 return snprintf(buf, 20, "unknown\n");
1430
1431 return get_fc_port_speed_names(fc_host_supported_speeds(shost), buf);
1432}
Tony Jonesee959b02008-02-22 00:13:36 +01001433static FC_DEVICE_ATTR(host, supported_speeds, S_IRUGO,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001434 show_fc_host_supported_speeds, NULL);
1435
1436
1437fc_private_host_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1438fc_private_host_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
Andreas Herrmann6b7281d2006-01-13 02:16:54 +01001439fc_private_host_rd_attr_cast(permanent_port_name, "0x%llx\n", 20,
1440 unsigned long long);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001441fc_private_host_rd_attr(maxframe_size, "%u bytes\n", 20);
James Smarta53eb5e2007-04-27 12:41:09 -04001442fc_private_host_rd_attr(max_npiv_vports, "%u\n", 20);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001443fc_private_host_rd_attr(serial_number, "%s\n", (FC_SERIAL_NUMBER_SIZE +1));
1444
1445
1446/* Dynamic Host Attributes */
1447
1448static ssize_t
Tony Jonesee959b02008-02-22 00:13:36 +01001449show_fc_host_active_fc4s (struct device *dev,
1450 struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001451{
Tony Jonesee959b02008-02-22 00:13:36 +01001452 struct Scsi_Host *shost = transport_class_to_shost(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001453 struct fc_internal *i = to_fc_internal(shost->transportt);
1454
1455 if (i->f->get_host_active_fc4s)
1456 i->f->get_host_active_fc4s(shost);
1457
1458 return (ssize_t)show_fc_fc4s(buf, fc_host_active_fc4s(shost));
1459}
Tony Jonesee959b02008-02-22 00:13:36 +01001460static FC_DEVICE_ATTR(host, active_fc4s, S_IRUGO,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001461 show_fc_host_active_fc4s, NULL);
1462
1463static ssize_t
Tony Jonesee959b02008-02-22 00:13:36 +01001464show_fc_host_speed (struct device *dev,
1465 struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001466{
Tony Jonesee959b02008-02-22 00:13:36 +01001467 struct Scsi_Host *shost = transport_class_to_shost(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001468 struct fc_internal *i = to_fc_internal(shost->transportt);
1469
1470 if (i->f->get_host_speed)
1471 i->f->get_host_speed(shost);
1472
1473 if (fc_host_speed(shost) == FC_PORTSPEED_UNKNOWN)
1474 return snprintf(buf, 20, "unknown\n");
1475
1476 return get_fc_port_speed_names(fc_host_speed(shost), buf);
1477}
Tony Jonesee959b02008-02-22 00:13:36 +01001478static FC_DEVICE_ATTR(host, speed, S_IRUGO,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001479 show_fc_host_speed, NULL);
1480
1481
1482fc_host_rd_attr(port_id, "0x%06x\n", 20);
1483fc_host_rd_enum_attr(port_type, FC_PORTTYPE_MAX_NAMELEN);
1484fc_host_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN);
1485fc_host_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long);
James Smart016131b2006-08-14 08:20:25 -04001486fc_host_rd_attr(symbolic_name, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001487
James Smartb8d08212006-08-17 08:00:43 -04001488fc_private_host_show_function(system_hostname, "%s\n",
1489 FC_SYMBOLIC_NAME_SIZE + 1, )
1490fc_host_store_str_function(system_hostname, FC_SYMBOLIC_NAME_SIZE)
Tony Jonesee959b02008-02-22 00:13:36 +01001491static FC_DEVICE_ATTR(host, system_hostname, S_IRUGO | S_IWUSR,
James Smartb8d08212006-08-17 08:00:43 -04001492 show_fc_host_system_hostname, store_fc_host_system_hostname);
1493
Linus Torvalds1da177e2005-04-16 15:20:36 -07001494
1495/* Private Host Attributes */
1496
1497static ssize_t
Tony Jonesee959b02008-02-22 00:13:36 +01001498show_fc_private_host_tgtid_bind_type(struct device *dev,
1499 struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001500{
Tony Jonesee959b02008-02-22 00:13:36 +01001501 struct Scsi_Host *shost = transport_class_to_shost(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001502 const char *name;
1503
1504 name = get_fc_tgtid_bind_type_name(fc_host_tgtid_bind_type(shost));
1505 if (!name)
1506 return -EINVAL;
1507 return snprintf(buf, FC_BINDTYPE_MAX_NAMELEN, "%s\n", name);
1508}
1509
James.Smart@Emulex.Comd16794f6a2005-10-05 13:50:08 -04001510#define get_list_head_entry(pos, head, member) \
1511 pos = list_entry((head)->next, typeof(*pos), member)
1512
Linus Torvalds1da177e2005-04-16 15:20:36 -07001513static ssize_t
Tony Jonesee959b02008-02-22 00:13:36 +01001514store_fc_private_host_tgtid_bind_type(struct device *dev,
1515 struct device_attribute *attr, const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001516{
Tony Jonesee959b02008-02-22 00:13:36 +01001517 struct Scsi_Host *shost = transport_class_to_shost(dev);
James.Smart@Emulex.Comd16794f6a2005-10-05 13:50:08 -04001518 struct fc_rport *rport;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001519 enum fc_tgtid_binding_type val;
1520 unsigned long flags;
1521
1522 if (get_fc_tgtid_bind_type_match(buf, &val))
1523 return -EINVAL;
1524
1525 /* if changing bind type, purge all unused consistent bindings */
1526 if (val != fc_host_tgtid_bind_type(shost)) {
1527 spin_lock_irqsave(shost->host_lock, flags);
James.Smart@Emulex.Comd16794f6a2005-10-05 13:50:08 -04001528 while (!list_empty(&fc_host_rport_bindings(shost))) {
1529 get_list_head_entry(rport,
1530 &fc_host_rport_bindings(shost), peers);
James Smartaedf3492006-04-10 10:14:05 -04001531 list_del(&rport->peers);
1532 rport->port_state = FC_PORTSTATE_DELETED;
1533 fc_queue_work(shost, &rport->rport_delete_work);
James.Smart@Emulex.Comd16794f6a2005-10-05 13:50:08 -04001534 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001535 spin_unlock_irqrestore(shost->host_lock, flags);
1536 }
1537
1538 fc_host_tgtid_bind_type(shost) = val;
1539 return count;
1540}
1541
Tony Jonesee959b02008-02-22 00:13:36 +01001542static FC_DEVICE_ATTR(host, tgtid_bind_type, S_IRUGO | S_IWUSR,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001543 show_fc_private_host_tgtid_bind_type,
1544 store_fc_private_host_tgtid_bind_type);
1545
Andrew Vasquez91ca7b02005-10-27 16:03:37 -07001546static ssize_t
Tony Jonesee959b02008-02-22 00:13:36 +01001547store_fc_private_host_issue_lip(struct device *dev,
1548 struct device_attribute *attr, const char *buf, size_t count)
Andrew Vasquez91ca7b02005-10-27 16:03:37 -07001549{
Tony Jonesee959b02008-02-22 00:13:36 +01001550 struct Scsi_Host *shost = transport_class_to_shost(dev);
Andrew Vasquez91ca7b02005-10-27 16:03:37 -07001551 struct fc_internal *i = to_fc_internal(shost->transportt);
1552 int ret;
1553
1554 /* ignore any data value written to the attribute */
1555 if (i->f->issue_fc_host_lip) {
1556 ret = i->f->issue_fc_host_lip(shost);
1557 return ret ? ret: count;
1558 }
1559
1560 return -ENOENT;
1561}
1562
Tony Jonesee959b02008-02-22 00:13:36 +01001563static FC_DEVICE_ATTR(host, issue_lip, S_IWUSR, NULL,
Andrew Vasquez91ca7b02005-10-27 16:03:37 -07001564 store_fc_private_host_issue_lip);
1565
James Smarta53eb5e2007-04-27 12:41:09 -04001566fc_private_host_rd_attr(npiv_vports_inuse, "%u\n", 20);
1567
1568
Linus Torvalds1da177e2005-04-16 15:20:36 -07001569/*
1570 * Host Statistics Management
1571 */
1572
1573/* Show a given an attribute in the statistics group */
1574static ssize_t
Tony Jonesee959b02008-02-22 00:13:36 +01001575fc_stat_show(const struct device *dev, char *buf, unsigned long offset)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001576{
Tony Jonesee959b02008-02-22 00:13:36 +01001577 struct Scsi_Host *shost = transport_class_to_shost(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001578 struct fc_internal *i = to_fc_internal(shost->transportt);
1579 struct fc_host_statistics *stats;
1580 ssize_t ret = -ENOENT;
1581
1582 if (offset > sizeof(struct fc_host_statistics) ||
1583 offset % sizeof(u64) != 0)
1584 WARN_ON(1);
1585
1586 if (i->f->get_fc_host_stats) {
1587 stats = (i->f->get_fc_host_stats)(shost);
1588 if (stats)
1589 ret = snprintf(buf, 20, "0x%llx\n",
1590 (unsigned long long)*(u64 *)(((u8 *) stats) + offset));
1591 }
1592 return ret;
1593}
1594
1595
1596/* generate a read-only statistics attribute */
1597#define fc_host_statistic(name) \
Tony Jonesee959b02008-02-22 00:13:36 +01001598static ssize_t show_fcstat_##name(struct device *cd, \
1599 struct device_attribute *attr, \
1600 char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001601{ \
1602 return fc_stat_show(cd, buf, \
1603 offsetof(struct fc_host_statistics, name)); \
1604} \
Tony Jonesee959b02008-02-22 00:13:36 +01001605static FC_DEVICE_ATTR(host, name, S_IRUGO, show_fcstat_##name, NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001606
1607fc_host_statistic(seconds_since_last_reset);
1608fc_host_statistic(tx_frames);
1609fc_host_statistic(tx_words);
1610fc_host_statistic(rx_frames);
1611fc_host_statistic(rx_words);
1612fc_host_statistic(lip_count);
1613fc_host_statistic(nos_count);
1614fc_host_statistic(error_frames);
1615fc_host_statistic(dumped_frames);
1616fc_host_statistic(link_failure_count);
1617fc_host_statistic(loss_of_sync_count);
1618fc_host_statistic(loss_of_signal_count);
1619fc_host_statistic(prim_seq_protocol_err_count);
1620fc_host_statistic(invalid_tx_word_count);
1621fc_host_statistic(invalid_crc_count);
1622fc_host_statistic(fcp_input_requests);
1623fc_host_statistic(fcp_output_requests);
1624fc_host_statistic(fcp_control_requests);
1625fc_host_statistic(fcp_input_megabytes);
1626fc_host_statistic(fcp_output_megabytes);
1627
1628static ssize_t
Tony Jonesee959b02008-02-22 00:13:36 +01001629fc_reset_statistics(struct device *dev, struct device_attribute *attr,
1630 const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001631{
Tony Jonesee959b02008-02-22 00:13:36 +01001632 struct Scsi_Host *shost = transport_class_to_shost(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001633 struct fc_internal *i = to_fc_internal(shost->transportt);
1634
1635 /* ignore any data value written to the attribute */
1636 if (i->f->reset_fc_host_stats) {
1637 i->f->reset_fc_host_stats(shost);
1638 return count;
1639 }
1640
1641 return -ENOENT;
1642}
Tony Jonesee959b02008-02-22 00:13:36 +01001643static FC_DEVICE_ATTR(host, reset_statistics, S_IWUSR, NULL,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001644 fc_reset_statistics);
1645
Linus Torvalds1da177e2005-04-16 15:20:36 -07001646static struct attribute *fc_statistics_attrs[] = {
Tony Jonesee959b02008-02-22 00:13:36 +01001647 &device_attr_host_seconds_since_last_reset.attr,
1648 &device_attr_host_tx_frames.attr,
1649 &device_attr_host_tx_words.attr,
1650 &device_attr_host_rx_frames.attr,
1651 &device_attr_host_rx_words.attr,
1652 &device_attr_host_lip_count.attr,
1653 &device_attr_host_nos_count.attr,
1654 &device_attr_host_error_frames.attr,
1655 &device_attr_host_dumped_frames.attr,
1656 &device_attr_host_link_failure_count.attr,
1657 &device_attr_host_loss_of_sync_count.attr,
1658 &device_attr_host_loss_of_signal_count.attr,
1659 &device_attr_host_prim_seq_protocol_err_count.attr,
1660 &device_attr_host_invalid_tx_word_count.attr,
1661 &device_attr_host_invalid_crc_count.attr,
1662 &device_attr_host_fcp_input_requests.attr,
1663 &device_attr_host_fcp_output_requests.attr,
1664 &device_attr_host_fcp_control_requests.attr,
1665 &device_attr_host_fcp_input_megabytes.attr,
1666 &device_attr_host_fcp_output_megabytes.attr,
1667 &device_attr_host_reset_statistics.attr,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001668 NULL
1669};
1670
1671static struct attribute_group fc_statistics_group = {
1672 .name = "statistics",
1673 .attrs = fc_statistics_attrs,
1674};
1675
James Smarta53eb5e2007-04-27 12:41:09 -04001676
1677/* Host Vport Attributes */
1678
1679static int
1680fc_parse_wwn(const char *ns, u64 *nm)
1681{
1682 unsigned int i, j;
1683 u8 wwn[8];
1684
1685 memset(wwn, 0, sizeof(wwn));
1686
1687 /* Validate and store the new name */
1688 for (i=0, j=0; i < 16; i++) {
1689 if ((*ns >= 'a') && (*ns <= 'f'))
1690 j = ((j << 4) | ((*ns++ -'a') + 10));
1691 else if ((*ns >= 'A') && (*ns <= 'F'))
1692 j = ((j << 4) | ((*ns++ -'A') + 10));
1693 else if ((*ns >= '0') && (*ns <= '9'))
1694 j = ((j << 4) | (*ns++ -'0'));
1695 else
1696 return -EINVAL;
1697 if (i % 2) {
1698 wwn[i/2] = j & 0xff;
1699 j = 0;
1700 }
1701 }
1702
1703 *nm = wwn_to_u64(wwn);
1704
1705 return 0;
1706}
1707
1708
1709/*
1710 * "Short-cut" sysfs variable to create a new vport on a FC Host.
1711 * Input is a string of the form "<WWPN>:<WWNN>". Other attributes
1712 * will default to a NPIV-based FCP_Initiator; The WWNs are specified
1713 * as hex characters, and may *not* contain any prefixes (e.g. 0x, x, etc)
1714 */
1715static ssize_t
Tony Jonesee959b02008-02-22 00:13:36 +01001716store_fc_host_vport_create(struct device *dev, struct device_attribute *attr,
1717 const char *buf, size_t count)
James Smarta53eb5e2007-04-27 12:41:09 -04001718{
Tony Jonesee959b02008-02-22 00:13:36 +01001719 struct Scsi_Host *shost = transport_class_to_shost(dev);
James Smarta53eb5e2007-04-27 12:41:09 -04001720 struct fc_vport_identifiers vid;
1721 struct fc_vport *vport;
1722 unsigned int cnt=count;
1723 int stat;
1724
1725 memset(&vid, 0, sizeof(vid));
1726
1727 /* count may include a LF at end of string */
1728 if (buf[cnt-1] == '\n')
1729 cnt--;
1730
1731 /* validate we have enough characters for WWPN */
1732 if ((cnt != (16+1+16)) || (buf[16] != ':'))
1733 return -EINVAL;
1734
1735 stat = fc_parse_wwn(&buf[0], &vid.port_name);
1736 if (stat)
1737 return stat;
1738
1739 stat = fc_parse_wwn(&buf[17], &vid.node_name);
1740 if (stat)
1741 return stat;
1742
1743 vid.roles = FC_PORT_ROLE_FCP_INITIATOR;
1744 vid.vport_type = FC_PORTTYPE_NPIV;
1745 /* vid.symbolic_name is already zero/NULL's */
1746 vid.disable = false; /* always enabled */
1747
1748 /* we only allow support on Channel 0 !!! */
Andrew Vasqueza30c3f62008-07-18 08:32:52 -07001749 stat = fc_vport_setup(shost, 0, &shost->shost_gendev, &vid, &vport);
James Smarta53eb5e2007-04-27 12:41:09 -04001750 return stat ? stat : count;
1751}
Tony Jonesee959b02008-02-22 00:13:36 +01001752static FC_DEVICE_ATTR(host, vport_create, S_IWUSR, NULL,
James Smarta53eb5e2007-04-27 12:41:09 -04001753 store_fc_host_vport_create);
1754
1755
1756/*
1757 * "Short-cut" sysfs variable to delete a vport on a FC Host.
1758 * Vport is identified by a string containing "<WWPN>:<WWNN>".
1759 * The WWNs are specified as hex characters, and may *not* contain
1760 * any prefixes (e.g. 0x, x, etc)
1761 */
1762static ssize_t
Tony Jonesee959b02008-02-22 00:13:36 +01001763store_fc_host_vport_delete(struct device *dev, struct device_attribute *attr,
1764 const char *buf, size_t count)
James Smarta53eb5e2007-04-27 12:41:09 -04001765{
Tony Jonesee959b02008-02-22 00:13:36 +01001766 struct Scsi_Host *shost = transport_class_to_shost(dev);
James Smarta53eb5e2007-04-27 12:41:09 -04001767 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1768 struct fc_vport *vport;
1769 u64 wwpn, wwnn;
1770 unsigned long flags;
1771 unsigned int cnt=count;
1772 int stat, match;
1773
1774 /* count may include a LF at end of string */
1775 if (buf[cnt-1] == '\n')
1776 cnt--;
1777
1778 /* validate we have enough characters for WWPN */
1779 if ((cnt != (16+1+16)) || (buf[16] != ':'))
1780 return -EINVAL;
1781
1782 stat = fc_parse_wwn(&buf[0], &wwpn);
1783 if (stat)
1784 return stat;
1785
1786 stat = fc_parse_wwn(&buf[17], &wwnn);
1787 if (stat)
1788 return stat;
1789
1790 spin_lock_irqsave(shost->host_lock, flags);
1791 match = 0;
1792 /* we only allow support on Channel 0 !!! */
1793 list_for_each_entry(vport, &fc_host->vports, peers) {
1794 if ((vport->channel == 0) &&
1795 (vport->port_name == wwpn) && (vport->node_name == wwnn)) {
1796 match = 1;
1797 break;
1798 }
1799 }
1800 spin_unlock_irqrestore(shost->host_lock, flags);
1801
1802 if (!match)
1803 return -ENODEV;
1804
1805 stat = fc_vport_terminate(vport);
1806 return stat ? stat : count;
1807}
Tony Jonesee959b02008-02-22 00:13:36 +01001808static FC_DEVICE_ATTR(host, vport_delete, S_IWUSR, NULL,
James Smarta53eb5e2007-04-27 12:41:09 -04001809 store_fc_host_vport_delete);
1810
1811
Linus Torvalds1da177e2005-04-16 15:20:36 -07001812static int fc_host_match(struct attribute_container *cont,
1813 struct device *dev)
1814{
1815 struct Scsi_Host *shost;
1816 struct fc_internal *i;
1817
1818 if (!scsi_is_host_device(dev))
1819 return 0;
1820
1821 shost = dev_to_shost(dev);
1822 if (!shost->transportt || shost->transportt->host_attrs.ac.class
1823 != &fc_host_class.class)
1824 return 0;
1825
1826 i = to_fc_internal(shost->transportt);
1827
1828 return &i->t.host_attrs.ac == cont;
1829}
1830
1831static int fc_target_match(struct attribute_container *cont,
1832 struct device *dev)
1833{
1834 struct Scsi_Host *shost;
1835 struct fc_internal *i;
1836
1837 if (!scsi_is_target_device(dev))
1838 return 0;
1839
1840 shost = dev_to_shost(dev->parent);
1841 if (!shost->transportt || shost->transportt->host_attrs.ac.class
1842 != &fc_host_class.class)
1843 return 0;
1844
1845 i = to_fc_internal(shost->transportt);
1846
1847 return &i->t.target_attrs.ac == cont;
1848}
1849
1850static void fc_rport_dev_release(struct device *dev)
1851{
1852 struct fc_rport *rport = dev_to_rport(dev);
1853 put_device(dev->parent);
1854 kfree(rport);
1855}
1856
1857int scsi_is_fc_rport(const struct device *dev)
1858{
1859 return dev->release == fc_rport_dev_release;
1860}
1861EXPORT_SYMBOL(scsi_is_fc_rport);
1862
1863static int fc_rport_match(struct attribute_container *cont,
1864 struct device *dev)
1865{
1866 struct Scsi_Host *shost;
1867 struct fc_internal *i;
1868
1869 if (!scsi_is_fc_rport(dev))
1870 return 0;
1871
1872 shost = dev_to_shost(dev->parent);
1873 if (!shost->transportt || shost->transportt->host_attrs.ac.class
1874 != &fc_host_class.class)
1875 return 0;
1876
1877 i = to_fc_internal(shost->transportt);
1878
1879 return &i->rport_attr_cont.ac == cont;
1880}
1881
James.Smart@Emulex.Com5c44cd22005-06-10 22:24:30 -04001882
James Smarta53eb5e2007-04-27 12:41:09 -04001883static void fc_vport_dev_release(struct device *dev)
1884{
1885 struct fc_vport *vport = dev_to_vport(dev);
1886 put_device(dev->parent); /* release kobj parent */
1887 kfree(vport);
1888}
1889
1890int scsi_is_fc_vport(const struct device *dev)
1891{
1892 return dev->release == fc_vport_dev_release;
1893}
1894EXPORT_SYMBOL(scsi_is_fc_vport);
1895
1896static int fc_vport_match(struct attribute_container *cont,
1897 struct device *dev)
1898{
1899 struct fc_vport *vport;
1900 struct Scsi_Host *shost;
1901 struct fc_internal *i;
1902
1903 if (!scsi_is_fc_vport(dev))
1904 return 0;
1905 vport = dev_to_vport(dev);
1906
1907 shost = vport_to_shost(vport);
1908 if (!shost->transportt || shost->transportt->host_attrs.ac.class
1909 != &fc_host_class.class)
1910 return 0;
1911
1912 i = to_fc_internal(shost->transportt);
1913 return &i->vport_attr_cont.ac == cont;
1914}
1915
1916
James Smartc829c392006-03-13 08:28:57 -05001917/**
1918 * fc_timed_out - FC Transport I/O timeout intercept handler
James Smartc829c392006-03-13 08:28:57 -05001919 * @scmd: The SCSI command which timed out
1920 *
1921 * This routine protects against error handlers getting invoked while a
1922 * rport is in a blocked state, typically due to a temporarily loss of
1923 * connectivity. If the error handlers are allowed to proceed, requests
1924 * to abort i/o, reset the target, etc will likely fail as there is no way
1925 * to communicate with the device to perform the requested function. These
1926 * failures may result in the midlayer taking the device offline, requiring
1927 * manual intervention to restore operation.
1928 *
1929 * This routine, called whenever an i/o times out, validates the state of
1930 * the underlying rport. If the rport is blocked, it returns
1931 * EH_RESET_TIMER, which will continue to reschedule the timeout.
1932 * Eventually, either the device will return, or devloss_tmo will fire,
1933 * and when the timeout then fires, it will be handled normally.
1934 * If the rport is not blocked, normal error handling continues.
1935 *
1936 * Notes:
1937 * This routine assumes no locks are held on entry.
Rob Landleyeb448202007-11-03 13:30:39 -05001938 */
Jens Axboe242f9dc2008-09-14 05:55:09 -07001939static enum blk_eh_timer_return
James Smartc829c392006-03-13 08:28:57 -05001940fc_timed_out(struct scsi_cmnd *scmd)
1941{
1942 struct fc_rport *rport = starget_to_rport(scsi_target(scmd->device));
1943
1944 if (rport->port_state == FC_PORTSTATE_BLOCKED)
Jens Axboe242f9dc2008-09-14 05:55:09 -07001945 return BLK_EH_RESET_TIMER;
James Smartc829c392006-03-13 08:28:57 -05001946
Jens Axboe242f9dc2008-09-14 05:55:09 -07001947 return BLK_EH_NOT_HANDLED;
James Smartc829c392006-03-13 08:28:57 -05001948}
1949
James.Smart@Emulex.Com5c44cd22005-06-10 22:24:30 -04001950/*
James Smartbda23252008-04-24 12:12:46 -04001951 * Called by fc_user_scan to locate an rport on the shost that
1952 * matches the channel and target id, and invoke scsi_scan_target()
1953 * on the rport.
James.Smart@Emulex.Com5c44cd22005-06-10 22:24:30 -04001954 */
James Smartbda23252008-04-24 12:12:46 -04001955static void
1956fc_user_scan_tgt(struct Scsi_Host *shost, uint channel, uint id, uint lun)
James.Smart@Emulex.Com5c44cd22005-06-10 22:24:30 -04001957{
1958 struct fc_rport *rport;
James Smartbda23252008-04-24 12:12:46 -04001959 unsigned long flags;
1960
1961 spin_lock_irqsave(shost->host_lock, flags);
James.Smart@Emulex.Com5c44cd22005-06-10 22:24:30 -04001962
Christoph Hellwige02f3f52006-01-13 19:04:00 +01001963 list_for_each_entry(rport, &fc_host_rports(shost), peers) {
1964 if (rport->scsi_target_id == -1)
1965 continue;
James.Smart@Emulex.Com5c44cd22005-06-10 22:24:30 -04001966
Hannes Reinecke0d2fcd92007-06-14 15:16:45 +02001967 if (rport->port_state != FC_PORTSTATE_ONLINE)
1968 continue;
1969
James Smartbda23252008-04-24 12:12:46 -04001970 if ((channel == rport->channel) &&
1971 (id == rport->scsi_target_id)) {
1972 spin_unlock_irqrestore(shost->host_lock, flags);
1973 scsi_scan_target(&rport->dev, channel, id, lun, 1);
1974 return;
Christoph Hellwige02f3f52006-01-13 19:04:00 +01001975 }
1976 }
1977
James Smartbda23252008-04-24 12:12:46 -04001978 spin_unlock_irqrestore(shost->host_lock, flags);
1979}
1980
1981/*
1982 * Called via sysfs scan routines. Necessary, as the FC transport
1983 * wants to place all target objects below the rport object. So this
1984 * routine must invoke the scsi_scan_target() routine with the rport
1985 * object as the parent.
1986 */
1987static int
1988fc_user_scan(struct Scsi_Host *shost, uint channel, uint id, uint lun)
1989{
1990 uint chlo, chhi;
1991 uint tgtlo, tgthi;
1992
1993 if (((channel != SCAN_WILD_CARD) && (channel > shost->max_channel)) ||
1994 ((id != SCAN_WILD_CARD) && (id >= shost->max_id)) ||
1995 ((lun != SCAN_WILD_CARD) && (lun > shost->max_lun)))
1996 return -EINVAL;
1997
1998 if (channel == SCAN_WILD_CARD) {
1999 chlo = 0;
2000 chhi = shost->max_channel + 1;
2001 } else {
2002 chlo = channel;
2003 chhi = channel + 1;
2004 }
2005
2006 if (id == SCAN_WILD_CARD) {
2007 tgtlo = 0;
2008 tgthi = shost->max_id;
2009 } else {
2010 tgtlo = id;
2011 tgthi = id + 1;
2012 }
2013
2014 for ( ; chlo < chhi; chlo++)
2015 for ( ; tgtlo < tgthi; tgtlo++)
2016 fc_user_scan_tgt(shost, chlo, tgtlo, lun);
2017
Christoph Hellwige02f3f52006-01-13 19:04:00 +01002018 return 0;
James.Smart@Emulex.Com5c44cd22005-06-10 22:24:30 -04002019}
2020
FUJITA Tomonori75252362007-09-01 02:02:27 +09002021static int fc_tsk_mgmt_response(struct Scsi_Host *shost, u64 nexus, u64 tm_id,
2022 int result)
2023{
2024 struct fc_internal *i = to_fc_internal(shost->transportt);
2025 return i->f->tsk_mgmt_response(shost, nexus, tm_id, result);
2026}
2027
2028static int fc_it_nexus_response(struct Scsi_Host *shost, u64 nexus, int result)
2029{
2030 struct fc_internal *i = to_fc_internal(shost->transportt);
2031 return i->f->it_nexus_response(shost, nexus, result);
2032}
2033
Linus Torvalds1da177e2005-04-16 15:20:36 -07002034struct scsi_transport_template *
2035fc_attach_transport(struct fc_function_template *ft)
2036{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002037 int count;
Jes Sorensen24669f752006-01-16 10:31:18 -05002038 struct fc_internal *i = kzalloc(sizeof(struct fc_internal),
2039 GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002040
2041 if (unlikely(!i))
2042 return NULL;
2043
Linus Torvalds1da177e2005-04-16 15:20:36 -07002044 i->t.target_attrs.ac.attrs = &i->starget_attrs[0];
2045 i->t.target_attrs.ac.class = &fc_transport_class.class;
2046 i->t.target_attrs.ac.match = fc_target_match;
2047 i->t.target_size = sizeof(struct fc_starget_attrs);
2048 transport_container_register(&i->t.target_attrs);
2049
2050 i->t.host_attrs.ac.attrs = &i->host_attrs[0];
2051 i->t.host_attrs.ac.class = &fc_host_class.class;
2052 i->t.host_attrs.ac.match = fc_host_match;
2053 i->t.host_size = sizeof(struct fc_host_attrs);
2054 if (ft->get_fc_host_stats)
2055 i->t.host_attrs.statistics = &fc_statistics_group;
2056 transport_container_register(&i->t.host_attrs);
2057
2058 i->rport_attr_cont.ac.attrs = &i->rport_attrs[0];
2059 i->rport_attr_cont.ac.class = &fc_rport_class.class;
2060 i->rport_attr_cont.ac.match = fc_rport_match;
2061 transport_container_register(&i->rport_attr_cont);
2062
James Smarta53eb5e2007-04-27 12:41:09 -04002063 i->vport_attr_cont.ac.attrs = &i->vport_attrs[0];
2064 i->vport_attr_cont.ac.class = &fc_vport_class.class;
2065 i->vport_attr_cont.ac.match = fc_vport_match;
2066 transport_container_register(&i->vport_attr_cont);
2067
Linus Torvalds1da177e2005-04-16 15:20:36 -07002068 i->f = ft;
2069
2070 /* Transport uses the shost workq for scsi scanning */
2071 i->t.create_work_queue = 1;
James.Smart@Emulex.Com5c44cd22005-06-10 22:24:30 -04002072
James Smartc829c392006-03-13 08:28:57 -05002073 i->t.eh_timed_out = fc_timed_out;
2074
Christoph Hellwige02f3f52006-01-13 19:04:00 +01002075 i->t.user_scan = fc_user_scan;
James Smart9ef3e4a2007-05-24 19:04:44 -04002076
FUJITA Tomonori75252362007-09-01 02:02:27 +09002077 /* target-mode drivers' functions */
2078 i->t.tsk_mgmt_response = fc_tsk_mgmt_response;
2079 i->t.it_nexus_response = fc_it_nexus_response;
2080
Linus Torvalds1da177e2005-04-16 15:20:36 -07002081 /*
2082 * Setup SCSI Target Attributes.
2083 */
2084 count = 0;
2085 SETUP_STARGET_ATTRIBUTE_RD(node_name);
2086 SETUP_STARGET_ATTRIBUTE_RD(port_name);
2087 SETUP_STARGET_ATTRIBUTE_RD(port_id);
2088
2089 BUG_ON(count > FC_STARGET_NUM_ATTRS);
2090
2091 i->starget_attrs[count] = NULL;
2092
2093
2094 /*
2095 * Setup SCSI Host Attributes.
2096 */
2097 count=0;
2098 SETUP_HOST_ATTRIBUTE_RD(node_name);
2099 SETUP_HOST_ATTRIBUTE_RD(port_name);
Andreas Herrmann6b7281d2006-01-13 02:16:54 +01002100 SETUP_HOST_ATTRIBUTE_RD(permanent_port_name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002101 SETUP_HOST_ATTRIBUTE_RD(supported_classes);
2102 SETUP_HOST_ATTRIBUTE_RD(supported_fc4s);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002103 SETUP_HOST_ATTRIBUTE_RD(supported_speeds);
2104 SETUP_HOST_ATTRIBUTE_RD(maxframe_size);
James Smarta53eb5e2007-04-27 12:41:09 -04002105 if (ft->vport_create) {
2106 SETUP_HOST_ATTRIBUTE_RD_NS(max_npiv_vports);
2107 SETUP_HOST_ATTRIBUTE_RD_NS(npiv_vports_inuse);
2108 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002109 SETUP_HOST_ATTRIBUTE_RD(serial_number);
2110
2111 SETUP_HOST_ATTRIBUTE_RD(port_id);
2112 SETUP_HOST_ATTRIBUTE_RD(port_type);
2113 SETUP_HOST_ATTRIBUTE_RD(port_state);
2114 SETUP_HOST_ATTRIBUTE_RD(active_fc4s);
2115 SETUP_HOST_ATTRIBUTE_RD(speed);
2116 SETUP_HOST_ATTRIBUTE_RD(fabric_name);
James Smart016131b2006-08-14 08:20:25 -04002117 SETUP_HOST_ATTRIBUTE_RD(symbolic_name);
James Smartb8d08212006-08-17 08:00:43 -04002118 SETUP_HOST_ATTRIBUTE_RW(system_hostname);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002119
2120 /* Transport-managed attributes */
2121 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type);
Andrew Vasquez91ca7b02005-10-27 16:03:37 -07002122 if (ft->issue_fc_host_lip)
2123 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(issue_lip);
James Smarta53eb5e2007-04-27 12:41:09 -04002124 if (ft->vport_create)
2125 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_create);
2126 if (ft->vport_delete)
2127 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_delete);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002128
2129 BUG_ON(count > FC_HOST_NUM_ATTRS);
2130
2131 i->host_attrs[count] = NULL;
2132
2133 /*
2134 * Setup Remote Port Attributes.
2135 */
2136 count=0;
2137 SETUP_RPORT_ATTRIBUTE_RD(maxframe_size);
2138 SETUP_RPORT_ATTRIBUTE_RD(supported_classes);
2139 SETUP_RPORT_ATTRIBUTE_RW(dev_loss_tmo);
2140 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(node_name);
2141 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_name);
2142 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_id);
2143 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(roles);
2144 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_state);
2145 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(scsi_target_id);
Mike Christiefff9d402008-08-19 18:45:23 -05002146 SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(fast_io_fail_tmo);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002147
2148 BUG_ON(count > FC_RPORT_NUM_ATTRS);
2149
2150 i->rport_attrs[count] = NULL;
2151
James Smarta53eb5e2007-04-27 12:41:09 -04002152 /*
2153 * Setup Virtual Port Attributes.
2154 */
2155 count=0;
2156 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_state);
2157 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_last_state);
2158 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(node_name);
2159 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(port_name);
2160 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(roles);
2161 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_type);
2162 SETUP_VPORT_ATTRIBUTE_RW(symbolic_name);
2163 SETUP_VPORT_ATTRIBUTE_WR(vport_delete);
2164 SETUP_VPORT_ATTRIBUTE_WR(vport_disable);
2165
2166 BUG_ON(count > FC_VPORT_NUM_ATTRS);
2167
2168 i->vport_attrs[count] = NULL;
2169
Linus Torvalds1da177e2005-04-16 15:20:36 -07002170 return &i->t;
2171}
2172EXPORT_SYMBOL(fc_attach_transport);
2173
2174void fc_release_transport(struct scsi_transport_template *t)
2175{
2176 struct fc_internal *i = to_fc_internal(t);
2177
2178 transport_container_unregister(&i->t.target_attrs);
2179 transport_container_unregister(&i->t.host_attrs);
2180 transport_container_unregister(&i->rport_attr_cont);
James Smarta53eb5e2007-04-27 12:41:09 -04002181 transport_container_unregister(&i->vport_attr_cont);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002182
2183 kfree(i);
2184}
2185EXPORT_SYMBOL(fc_release_transport);
2186
James Smartaedf3492006-04-10 10:14:05 -04002187/**
2188 * fc_queue_work - Queue work to the fc_host workqueue.
2189 * @shost: Pointer to Scsi_Host bound to fc_host.
2190 * @work: Work to queue for execution.
2191 *
2192 * Return value:
James Smarta0785ed2006-05-11 13:27:09 -04002193 * 1 - work queued for execution
2194 * 0 - work is already queued
2195 * -EINVAL - work queue doesn't exist
Rob Landleyeb448202007-11-03 13:30:39 -05002196 */
James Smartaedf3492006-04-10 10:14:05 -04002197static int
2198fc_queue_work(struct Scsi_Host *shost, struct work_struct *work)
2199{
2200 if (unlikely(!fc_host_work_q(shost))) {
2201 printk(KERN_ERR
2202 "ERROR: FC host '%s' attempted to queue work, "
2203 "when no workqueue created.\n", shost->hostt->name);
2204 dump_stack();
2205
2206 return -EINVAL;
2207 }
2208
2209 return queue_work(fc_host_work_q(shost), work);
2210}
2211
2212/**
2213 * fc_flush_work - Flush a fc_host's workqueue.
2214 * @shost: Pointer to Scsi_Host bound to fc_host.
Rob Landleyeb448202007-11-03 13:30:39 -05002215 */
James Smartaedf3492006-04-10 10:14:05 -04002216static void
2217fc_flush_work(struct Scsi_Host *shost)
2218{
2219 if (!fc_host_work_q(shost)) {
2220 printk(KERN_ERR
2221 "ERROR: FC host '%s' attempted to flush work, "
2222 "when no workqueue created.\n", shost->hostt->name);
2223 dump_stack();
2224 return;
2225 }
2226
2227 flush_workqueue(fc_host_work_q(shost));
2228}
2229
2230/**
2231 * fc_queue_devloss_work - Schedule work for the fc_host devloss workqueue.
2232 * @shost: Pointer to Scsi_Host bound to fc_host.
2233 * @work: Work to queue for execution.
2234 * @delay: jiffies to delay the work queuing
2235 *
2236 * Return value:
James Smart0f29b962006-08-18 17:33:29 -04002237 * 1 on success / 0 already queued / < 0 for error
Rob Landleyeb448202007-11-03 13:30:39 -05002238 */
James Smartaedf3492006-04-10 10:14:05 -04002239static int
David Howellsc4028952006-11-22 14:57:56 +00002240fc_queue_devloss_work(struct Scsi_Host *shost, struct delayed_work *work,
James Smartaedf3492006-04-10 10:14:05 -04002241 unsigned long delay)
2242{
2243 if (unlikely(!fc_host_devloss_work_q(shost))) {
2244 printk(KERN_ERR
2245 "ERROR: FC host '%s' attempted to queue work, "
2246 "when no workqueue created.\n", shost->hostt->name);
2247 dump_stack();
2248
2249 return -EINVAL;
2250 }
2251
2252 return queue_delayed_work(fc_host_devloss_work_q(shost), work, delay);
2253}
2254
2255/**
2256 * fc_flush_devloss - Flush a fc_host's devloss workqueue.
2257 * @shost: Pointer to Scsi_Host bound to fc_host.
Rob Landleyeb448202007-11-03 13:30:39 -05002258 */
James Smartaedf3492006-04-10 10:14:05 -04002259static void
2260fc_flush_devloss(struct Scsi_Host *shost)
2261{
2262 if (!fc_host_devloss_work_q(shost)) {
2263 printk(KERN_ERR
2264 "ERROR: FC host '%s' attempted to flush work, "
2265 "when no workqueue created.\n", shost->hostt->name);
2266 dump_stack();
2267 return;
2268 }
2269
2270 flush_workqueue(fc_host_devloss_work_q(shost));
2271}
2272
Linus Torvalds1da177e2005-04-16 15:20:36 -07002273
2274/**
Rob Landleyeb448202007-11-03 13:30:39 -05002275 * fc_remove_host - called to terminate any fc_transport-related elements for a scsi host.
2276 * @shost: Which &Scsi_Host
Linus Torvalds1da177e2005-04-16 15:20:36 -07002277 *
2278 * This routine is expected to be called immediately preceeding the
2279 * a driver's call to scsi_remove_host().
2280 *
2281 * WARNING: A driver utilizing the fc_transport, which fails to call
Rob Landleyeb448202007-11-03 13:30:39 -05002282 * this routine prior to scsi_remove_host(), will leave dangling
Linus Torvalds1da177e2005-04-16 15:20:36 -07002283 * objects in /sys/class/fc_remote_ports. Access to any of these
2284 * objects can result in a system crash !!!
2285 *
2286 * Notes:
2287 * This routine assumes no locks are held on entry.
Rob Landleyeb448202007-11-03 13:30:39 -05002288 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002289void
2290fc_remove_host(struct Scsi_Host *shost)
2291{
James Smarta53eb5e2007-04-27 12:41:09 -04002292 struct fc_vport *vport = NULL, *next_vport = NULL;
2293 struct fc_rport *rport = NULL, *next_rport = NULL;
James Smartaedf3492006-04-10 10:14:05 -04002294 struct workqueue_struct *work_q;
2295 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
James Smarta53eb5e2007-04-27 12:41:09 -04002296 unsigned long flags;
James Smarta53eb5e2007-04-27 12:41:09 -04002297
2298 spin_lock_irqsave(shost->host_lock, flags);
2299
2300 /* Remove any vports */
James Smart9ef3e4a2007-05-24 19:04:44 -04002301 list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers)
2302 fc_queue_work(shost, &vport->vport_delete_work);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002303
2304 /* Remove any remote ports */
2305 list_for_each_entry_safe(rport, next_rport,
James Smartaedf3492006-04-10 10:14:05 -04002306 &fc_host->rports, peers) {
2307 list_del(&rport->peers);
2308 rport->port_state = FC_PORTSTATE_DELETED;
2309 fc_queue_work(shost, &rport->rport_delete_work);
2310 }
2311
Linus Torvalds1da177e2005-04-16 15:20:36 -07002312 list_for_each_entry_safe(rport, next_rport,
James Smartaedf3492006-04-10 10:14:05 -04002313 &fc_host->rport_bindings, peers) {
2314 list_del(&rport->peers);
2315 rport->port_state = FC_PORTSTATE_DELETED;
2316 fc_queue_work(shost, &rport->rport_delete_work);
2317 }
2318
James Smarta53eb5e2007-04-27 12:41:09 -04002319 spin_unlock_irqrestore(shost->host_lock, flags);
2320
James Smartaedf3492006-04-10 10:14:05 -04002321 /* flush all scan work items */
2322 scsi_flush_work(shost);
2323
2324 /* flush all stgt delete, and rport delete work items, then kill it */
2325 if (fc_host->work_q) {
2326 work_q = fc_host->work_q;
2327 fc_host->work_q = NULL;
2328 destroy_workqueue(work_q);
2329 }
2330
2331 /* flush all devloss work items, then kill it */
2332 if (fc_host->devloss_work_q) {
2333 work_q = fc_host->devloss_work_q;
2334 fc_host->devloss_work_q = NULL;
2335 destroy_workqueue(work_q);
2336 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002337}
2338EXPORT_SYMBOL(fc_remove_host);
2339
Mike Christiefff9d402008-08-19 18:45:23 -05002340static void fc_terminate_rport_io(struct fc_rport *rport)
2341{
2342 struct Scsi_Host *shost = rport_to_shost(rport);
2343 struct fc_internal *i = to_fc_internal(shost->transportt);
2344
2345 /* Involve the LLDD if possible to terminate all io on the rport. */
2346 if (i->f->terminate_rport_io)
2347 i->f->terminate_rport_io(rport);
2348
2349 /*
2350 * must unblock to flush queued IO. The caller will have set
2351 * the port_state or flags, so that fc_remote_port_chkready will
2352 * fail IO.
2353 */
2354 scsi_target_unblock(&rport->dev);
2355}
James Smartaedf3492006-04-10 10:14:05 -04002356
2357/**
2358 * fc_starget_delete - called to delete the scsi decendents of an rport
David Howellsc4028952006-11-22 14:57:56 +00002359 * @work: remote port to be operated on.
Rob Landleyeb448202007-11-03 13:30:39 -05002360 *
2361 * Deletes target and all sdevs.
2362 */
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04002363static void
David Howellsc4028952006-11-22 14:57:56 +00002364fc_starget_delete(struct work_struct *work)
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04002365{
David Howellsc4028952006-11-22 14:57:56 +00002366 struct fc_rport *rport =
2367 container_of(work, struct fc_rport, stgt_delete_work);
James Smart0f29b962006-08-18 17:33:29 -04002368
Mike Christiefff9d402008-08-19 18:45:23 -05002369 fc_terminate_rport_io(rport);
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04002370 scsi_remove_target(&rport->dev);
2371}
2372
James Smartaedf3492006-04-10 10:14:05 -04002373
2374/**
2375 * fc_rport_final_delete - finish rport termination and delete it.
David Howellsc4028952006-11-22 14:57:56 +00002376 * @work: remote port to be deleted.
Rob Landleyeb448202007-11-03 13:30:39 -05002377 */
James Smartaedf3492006-04-10 10:14:05 -04002378static void
David Howellsc4028952006-11-22 14:57:56 +00002379fc_rport_final_delete(struct work_struct *work)
James Smartaedf3492006-04-10 10:14:05 -04002380{
David Howellsc4028952006-11-22 14:57:56 +00002381 struct fc_rport *rport =
2382 container_of(work, struct fc_rport, rport_delete_work);
James Smartaedf3492006-04-10 10:14:05 -04002383 struct device *dev = &rport->dev;
2384 struct Scsi_Host *shost = rport_to_shost(rport);
James Smart0f29b962006-08-18 17:33:29 -04002385 struct fc_internal *i = to_fc_internal(shost->transportt);
James Smart92740b22007-04-27 11:53:17 -04002386 unsigned long flags;
James Smartaedf3492006-04-10 10:14:05 -04002387
2388 /*
James Smart9ef3e4a2007-05-24 19:04:44 -04002389 * if a scan is pending, flush the SCSI Host work_q so that
James Smartaedf3492006-04-10 10:14:05 -04002390 * that we can reclaim the rport scan work element.
2391 */
2392 if (rport->flags & FC_RPORT_SCAN_PENDING)
2393 scsi_flush_work(shost);
2394
Mike Christiefff9d402008-08-19 18:45:23 -05002395 fc_terminate_rport_io(rport);
James Smart9e4f5e22009-03-26 13:33:19 -04002396
James Smart92740b22007-04-27 11:53:17 -04002397 /*
2398 * Cancel any outstanding timers. These should really exist
2399 * only when rmmod'ing the LLDD and we're asking for
2400 * immediate termination of the rports
2401 */
2402 spin_lock_irqsave(shost->host_lock, flags);
2403 if (rport->flags & FC_RPORT_DEVLOSS_PENDING) {
2404 spin_unlock_irqrestore(shost->host_lock, flags);
2405 if (!cancel_delayed_work(&rport->fail_io_work))
2406 fc_flush_devloss(shost);
2407 if (!cancel_delayed_work(&rport->dev_loss_work))
2408 fc_flush_devloss(shost);
2409 spin_lock_irqsave(shost->host_lock, flags);
2410 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
2411 }
2412 spin_unlock_irqrestore(shost->host_lock, flags);
2413
James Smart0f29b962006-08-18 17:33:29 -04002414 /* Delete SCSI target and sdevs */
2415 if (rport->scsi_target_id != -1)
David Howellsc4028952006-11-22 14:57:56 +00002416 fc_starget_delete(&rport->stgt_delete_work);
James Smart92740b22007-04-27 11:53:17 -04002417
2418 /*
2419 * Notify the driver that the rport is now dead. The LLDD will
2420 * also guarantee that any communication to the rport is terminated
James Smart4be98c02009-01-05 12:14:18 -05002421 *
2422 * Avoid this call if we already called it when we preserved the
2423 * rport for the binding.
James Smart92740b22007-04-27 11:53:17 -04002424 */
James Smart4be98c02009-01-05 12:14:18 -05002425 if (!(rport->flags & FC_RPORT_DEVLOSS_CALLBK_DONE) &&
2426 (i->f->dev_loss_tmo_callbk))
James Smart0f29b962006-08-18 17:33:29 -04002427 i->f->dev_loss_tmo_callbk(rport);
James Smart0f29b962006-08-18 17:33:29 -04002428
James Smart9e4f5e22009-03-26 13:33:19 -04002429 fc_bsg_remove(rport->rqst_q);
2430
James Smartaedf3492006-04-10 10:14:05 -04002431 transport_remove_device(dev);
2432 device_del(dev);
2433 transport_destroy_device(dev);
James Smart3bdad7b2006-06-26 14:19:59 -04002434 put_device(&shost->shost_gendev); /* for fc_host->rport list */
2435 put_device(dev); /* for self-reference */
James Smartaedf3492006-04-10 10:14:05 -04002436}
2437
2438
Linus Torvalds1da177e2005-04-16 15:20:36 -07002439/**
2440 * fc_rport_create - allocates and creates a remote FC port.
2441 * @shost: scsi host the remote port is connected to.
2442 * @channel: Channel on shost port connected to.
2443 * @ids: The world wide names, fc address, and FC4 port
2444 * roles for the remote port.
2445 *
2446 * Allocates and creates the remoter port structure, including the
2447 * class and sysfs creation.
2448 *
2449 * Notes:
2450 * This routine assumes no locks are held on entry.
Rob Landleyeb448202007-11-03 13:30:39 -05002451 */
Adrian Bunk44818ef2007-07-09 11:59:59 -07002452static struct fc_rport *
Linus Torvalds1da177e2005-04-16 15:20:36 -07002453fc_rport_create(struct Scsi_Host *shost, int channel,
2454 struct fc_rport_identifiers *ids)
2455{
James Smartaedf3492006-04-10 10:14:05 -04002456 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002457 struct fc_internal *fci = to_fc_internal(shost->transportt);
2458 struct fc_rport *rport;
2459 struct device *dev;
2460 unsigned long flags;
2461 int error;
2462 size_t size;
2463
2464 size = (sizeof(struct fc_rport) + fci->f->dd_fcrport_size);
Jes Sorensen24669f752006-01-16 10:31:18 -05002465 rport = kzalloc(size, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002466 if (unlikely(!rport)) {
Harvey Harrisoncadbd4a2008-07-03 23:47:27 -07002467 printk(KERN_ERR "%s: allocation failure\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002468 return NULL;
2469 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002470
2471 rport->maxframe_size = -1;
2472 rport->supported_classes = FC_COS_UNSPECIFIED;
2473 rport->dev_loss_tmo = fc_dev_loss_tmo;
2474 memcpy(&rport->node_name, &ids->node_name, sizeof(rport->node_name));
2475 memcpy(&rport->port_name, &ids->port_name, sizeof(rport->port_name));
2476 rport->port_id = ids->port_id;
2477 rport->roles = ids->roles;
2478 rport->port_state = FC_PORTSTATE_ONLINE;
2479 if (fci->f->dd_fcrport_size)
2480 rport->dd_data = &rport[1];
2481 rport->channel = channel;
James Smart0f29b962006-08-18 17:33:29 -04002482 rport->fast_io_fail_tmo = -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002483
David Howellsc4028952006-11-22 14:57:56 +00002484 INIT_DELAYED_WORK(&rport->dev_loss_work, fc_timeout_deleted_rport);
2485 INIT_DELAYED_WORK(&rport->fail_io_work, fc_timeout_fail_rport_io);
2486 INIT_WORK(&rport->scan_work, fc_scsi_scan_rport);
2487 INIT_WORK(&rport->stgt_delete_work, fc_starget_delete);
2488 INIT_WORK(&rport->rport_delete_work, fc_rport_final_delete);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002489
2490 spin_lock_irqsave(shost->host_lock, flags);
2491
2492 rport->number = fc_host->next_rport_number++;
James Smarta53eb5e2007-04-27 12:41:09 -04002493 if (rport->roles & FC_PORT_ROLE_FCP_TARGET)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002494 rport->scsi_target_id = fc_host->next_target_id++;
2495 else
2496 rport->scsi_target_id = -1;
James Smartaedf3492006-04-10 10:14:05 -04002497 list_add_tail(&rport->peers, &fc_host->rports);
James Smart3bdad7b2006-06-26 14:19:59 -04002498 get_device(&shost->shost_gendev); /* for fc_host->rport list */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002499
2500 spin_unlock_irqrestore(shost->host_lock, flags);
2501
2502 dev = &rport->dev;
James Smart3bdad7b2006-06-26 14:19:59 -04002503 device_initialize(dev); /* takes self reference */
2504 dev->parent = get_device(&shost->shost_gendev); /* parent reference */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002505 dev->release = fc_rport_dev_release;
Kay Sievers71610f52008-12-03 22:41:36 +01002506 dev_set_name(dev, "rport-%d:%d-%d",
2507 shost->host_no, channel, rport->number);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002508 transport_setup_device(dev);
2509
2510 error = device_add(dev);
2511 if (error) {
2512 printk(KERN_ERR "FC Remote Port device_add failed\n");
2513 goto delete_rport;
2514 }
2515 transport_add_device(dev);
2516 transport_configure_device(dev);
2517
James Smart9e4f5e22009-03-26 13:33:19 -04002518 fc_bsg_rportadd(shost, rport);
2519 /* ignore any bsg add error - we just can't do sgio */
2520
James Smarta53eb5e2007-04-27 12:41:09 -04002521 if (rport->roles & FC_PORT_ROLE_FCP_TARGET) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002522 /* initiate a scan of the target */
James Smartaedf3492006-04-10 10:14:05 -04002523 rport->flags |= FC_RPORT_SCAN_PENDING;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002524 scsi_queue_work(shost, &rport->scan_work);
James Smartaedf3492006-04-10 10:14:05 -04002525 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002526
2527 return rport;
2528
2529delete_rport:
2530 transport_destroy_device(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002531 spin_lock_irqsave(shost->host_lock, flags);
2532 list_del(&rport->peers);
James Smart3bdad7b2006-06-26 14:19:59 -04002533 put_device(&shost->shost_gendev); /* for fc_host->rport list */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002534 spin_unlock_irqrestore(shost->host_lock, flags);
2535 put_device(dev->parent);
2536 kfree(rport);
2537 return NULL;
2538}
2539
2540/**
Rob Landleyeb448202007-11-03 13:30:39 -05002541 * fc_remote_port_add - notify fc transport of the existence of a remote FC port.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002542 * @shost: scsi host the remote port is connected to.
2543 * @channel: Channel on shost port connected to.
2544 * @ids: The world wide names, fc address, and FC4 port
2545 * roles for the remote port.
2546 *
2547 * The LLDD calls this routine to notify the transport of the existence
2548 * of a remote port. The LLDD provides the unique identifiers (wwpn,wwn)
2549 * of the port, it's FC address (port_id), and the FC4 roles that are
2550 * active for the port.
2551 *
2552 * For ports that are FCP targets (aka scsi targets), the FC transport
2553 * maintains consistent target id bindings on behalf of the LLDD.
2554 * A consistent target id binding is an assignment of a target id to
2555 * a remote port identifier, which persists while the scsi host is
2556 * attached. The remote port can disappear, then later reappear, and
2557 * it's target id assignment remains the same. This allows for shifts
2558 * in FC addressing (if binding by wwpn or wwnn) with no apparent
2559 * changes to the scsi subsystem which is based on scsi host number and
2560 * target id values. Bindings are only valid during the attachment of
2561 * the scsi host. If the host detaches, then later re-attaches, target
2562 * id bindings may change.
2563 *
2564 * This routine is responsible for returning a remote port structure.
2565 * The routine will search the list of remote ports it maintains
2566 * internally on behalf of consistent target id mappings. If found, the
2567 * remote port structure will be reused. Otherwise, a new remote port
2568 * structure will be allocated.
2569 *
2570 * Whenever a remote port is allocated, a new fc_remote_port class
2571 * device is created.
2572 *
2573 * Should not be called from interrupt context.
2574 *
2575 * Notes:
2576 * This routine assumes no locks are held on entry.
Rob Landleyeb448202007-11-03 13:30:39 -05002577 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002578struct fc_rport *
2579fc_remote_port_add(struct Scsi_Host *shost, int channel,
2580 struct fc_rport_identifiers *ids)
2581{
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04002582 struct fc_internal *fci = to_fc_internal(shost->transportt);
James Smartaedf3492006-04-10 10:14:05 -04002583 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002584 struct fc_rport *rport;
2585 unsigned long flags;
2586 int match = 0;
2587
James Smartaedf3492006-04-10 10:14:05 -04002588 /* ensure any stgt delete functions are done */
2589 fc_flush_work(shost);
2590
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04002591 /*
2592 * Search the list of "active" rports, for an rport that has been
2593 * deleted, but we've held off the real delete while the target
2594 * is in a "blocked" state.
2595 */
2596 spin_lock_irqsave(shost->host_lock, flags);
2597
James Smartaedf3492006-04-10 10:14:05 -04002598 list_for_each_entry(rport, &fc_host->rports, peers) {
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04002599
2600 if ((rport->port_state == FC_PORTSTATE_BLOCKED) &&
2601 (rport->channel == channel)) {
2602
James Smartaedf3492006-04-10 10:14:05 -04002603 switch (fc_host->tgtid_bind_type) {
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04002604 case FC_TGTID_BIND_BY_WWPN:
2605 case FC_TGTID_BIND_NONE:
2606 if (rport->port_name == ids->port_name)
2607 match = 1;
2608 break;
2609 case FC_TGTID_BIND_BY_WWNN:
2610 if (rport->node_name == ids->node_name)
2611 match = 1;
2612 break;
2613 case FC_TGTID_BIND_BY_ID:
2614 if (rport->port_id == ids->port_id)
2615 match = 1;
2616 break;
2617 }
2618
2619 if (match) {
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04002620
2621 memcpy(&rport->node_name, &ids->node_name,
2622 sizeof(rport->node_name));
2623 memcpy(&rport->port_name, &ids->port_name,
2624 sizeof(rport->port_name));
2625 rport->port_id = ids->port_id;
2626
2627 rport->port_state = FC_PORTSTATE_ONLINE;
2628 rport->roles = ids->roles;
2629
2630 spin_unlock_irqrestore(shost->host_lock, flags);
2631
2632 if (fci->f->dd_fcrport_size)
2633 memset(rport->dd_data, 0,
2634 fci->f->dd_fcrport_size);
2635
2636 /*
James Smart92740b22007-04-27 11:53:17 -04002637 * If we were not a target, cancel the
2638 * io terminate and rport timers, and
2639 * we're done.
2640 *
2641 * If we were a target, but our new role
2642 * doesn't indicate a target, leave the
2643 * timers running expecting the role to
2644 * change as the target fully logs in. If
2645 * it doesn't, the target will be torn down.
2646 *
2647 * If we were a target, and our role shows
2648 * we're still a target, cancel the timers
2649 * and kick off a scan.
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04002650 */
James Smart92740b22007-04-27 11:53:17 -04002651
2652 /* was a target, not in roles */
2653 if ((rport->scsi_target_id != -1) &&
James Smarta53eb5e2007-04-27 12:41:09 -04002654 (!(ids->roles & FC_PORT_ROLE_FCP_TARGET)))
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04002655 return rport;
2656
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04002657 /*
James Smart92740b22007-04-27 11:53:17 -04002658 * Stop the fail io and dev_loss timers.
2659 * If they flush, the port_state will
2660 * be checked and will NOOP the function.
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04002661 */
James Smart0f29b962006-08-18 17:33:29 -04002662 if (!cancel_delayed_work(&rport->fail_io_work))
2663 fc_flush_devloss(shost);
James Smart92740b22007-04-27 11:53:17 -04002664 if (!cancel_delayed_work(&rport->dev_loss_work))
James Smartaedf3492006-04-10 10:14:05 -04002665 fc_flush_devloss(shost);
2666
2667 spin_lock_irqsave(shost->host_lock, flags);
2668
Mike Christiefff9d402008-08-19 18:45:23 -05002669 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT |
James Smart4be98c02009-01-05 12:14:18 -05002670 FC_RPORT_DEVLOSS_PENDING |
2671 FC_RPORT_DEVLOSS_CALLBK_DONE);
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04002672
James Smart92740b22007-04-27 11:53:17 -04002673 /* if target, initiate a scan */
2674 if (rport->scsi_target_id != -1) {
2675 rport->flags |= FC_RPORT_SCAN_PENDING;
2676 scsi_queue_work(shost,
2677 &rport->scan_work);
2678 spin_unlock_irqrestore(shost->host_lock,
2679 flags);
2680 scsi_target_unblock(&rport->dev);
2681 } else
2682 spin_unlock_irqrestore(shost->host_lock,
2683 flags);
James Smarta0785ed2006-05-11 13:27:09 -04002684
James Smart9e4f5e22009-03-26 13:33:19 -04002685 fc_bsg_goose_queue(rport);
2686
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04002687 return rport;
2688 }
2689 }
2690 }
2691
James Smart92740b22007-04-27 11:53:17 -04002692 /*
2693 * Search the bindings array
2694 * Note: if never a FCP target, you won't be on this list
2695 */
James Smartaedf3492006-04-10 10:14:05 -04002696 if (fc_host->tgtid_bind_type != FC_TGTID_BIND_NONE) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002697
2698 /* search for a matching consistent binding */
2699
James Smartaedf3492006-04-10 10:14:05 -04002700 list_for_each_entry(rport, &fc_host->rport_bindings,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002701 peers) {
2702 if (rport->channel != channel)
2703 continue;
2704
James Smartaedf3492006-04-10 10:14:05 -04002705 switch (fc_host->tgtid_bind_type) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002706 case FC_TGTID_BIND_BY_WWPN:
2707 if (rport->port_name == ids->port_name)
2708 match = 1;
2709 break;
2710 case FC_TGTID_BIND_BY_WWNN:
2711 if (rport->node_name == ids->node_name)
2712 match = 1;
2713 break;
2714 case FC_TGTID_BIND_BY_ID:
2715 if (rport->port_id == ids->port_id)
2716 match = 1;
2717 break;
2718 case FC_TGTID_BIND_NONE: /* to keep compiler happy */
2719 break;
2720 }
2721
2722 if (match) {
James Smartaedf3492006-04-10 10:14:05 -04002723 list_move_tail(&rport->peers, &fc_host->rports);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002724 break;
2725 }
2726 }
2727
Linus Torvalds1da177e2005-04-16 15:20:36 -07002728 if (match) {
2729 memcpy(&rport->node_name, &ids->node_name,
2730 sizeof(rport->node_name));
2731 memcpy(&rport->port_name, &ids->port_name,
2732 sizeof(rport->port_name));
2733 rport->port_id = ids->port_id;
2734 rport->roles = ids->roles;
2735 rport->port_state = FC_PORTSTATE_ONLINE;
Mike Christiefff9d402008-08-19 18:45:23 -05002736 rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002737
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04002738 if (fci->f->dd_fcrport_size)
2739 memset(rport->dd_data, 0,
2740 fci->f->dd_fcrport_size);
2741
James Smarta53eb5e2007-04-27 12:41:09 -04002742 if (rport->roles & FC_PORT_ROLE_FCP_TARGET) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002743 /* initiate a scan of the target */
James Smartaedf3492006-04-10 10:14:05 -04002744 rport->flags |= FC_RPORT_SCAN_PENDING;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002745 scsi_queue_work(shost, &rport->scan_work);
James Smarta0785ed2006-05-11 13:27:09 -04002746 spin_unlock_irqrestore(shost->host_lock, flags);
2747 scsi_target_unblock(&rport->dev);
2748 } else
2749 spin_unlock_irqrestore(shost->host_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002750
2751 return rport;
2752 }
2753 }
2754
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04002755 spin_unlock_irqrestore(shost->host_lock, flags);
2756
Linus Torvalds1da177e2005-04-16 15:20:36 -07002757 /* No consistent binding found - create new remote port entry */
2758 rport = fc_rport_create(shost, channel, ids);
2759
2760 return rport;
2761}
2762EXPORT_SYMBOL(fc_remote_port_add);
2763
Linus Torvalds1da177e2005-04-16 15:20:36 -07002764
2765/**
Rob Landleyeb448202007-11-03 13:30:39 -05002766 * fc_remote_port_delete - notifies the fc transport that a remote port is no longer in existence.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002767 * @rport: The remote port that no longer exists
2768 *
2769 * The LLDD calls this routine to notify the transport that a remote
2770 * port is no longer part of the topology. Note: Although a port
2771 * may no longer be part of the topology, it may persist in the remote
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04002772 * ports displayed by the fc_host. We do this under 2 conditions:
Rob Landleyeb448202007-11-03 13:30:39 -05002773 * 1) If the port was a scsi target, we delay its deletion by "blocking" it.
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04002774 * This allows the port to temporarily disappear, then reappear without
2775 * disrupting the SCSI device tree attached to it. During the "blocked"
2776 * period the port will still exist.
Rob Landleyeb448202007-11-03 13:30:39 -05002777 * 2) If the port was a scsi target and disappears for longer than we
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04002778 * expect, we'll delete the port and the tear down the SCSI device tree
2779 * attached to it. However, we want to semi-persist the target id assigned
2780 * to that port if it eventually does exist. The port structure will
2781 * remain (although with minimal information) so that the target id
2782 * bindings remails.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002783 *
2784 * If the remote port is not an FCP Target, it will be fully torn down
2785 * and deallocated, including the fc_remote_port class device.
2786 *
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04002787 * If the remote port is an FCP Target, the port will be placed in a
2788 * temporary blocked state. From the LLDD's perspective, the rport no
2789 * longer exists. From the SCSI midlayer's perspective, the SCSI target
2790 * exists, but all sdevs on it are blocked from further I/O. The following
Rob Landleyeb448202007-11-03 13:30:39 -05002791 * is then expected.
2792 *
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04002793 * If the remote port does not return (signaled by a LLDD call to
2794 * fc_remote_port_add()) within the dev_loss_tmo timeout, then the
2795 * scsi target is removed - killing all outstanding i/o and removing the
2796 * scsi devices attached ot it. The port structure will be marked Not
2797 * Present and be partially cleared, leaving only enough information to
2798 * recognize the remote port relative to the scsi target id binding if
2799 * it later appears. The port will remain as long as there is a valid
2800 * binding (e.g. until the user changes the binding type or unloads the
2801 * scsi host with the binding).
Linus Torvalds1da177e2005-04-16 15:20:36 -07002802 *
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04002803 * If the remote port returns within the dev_loss_tmo value (and matches
2804 * according to the target id binding type), the port structure will be
2805 * reused. If it is no longer a SCSI target, the target will be torn
2806 * down. If it continues to be a SCSI target, then the target will be
2807 * unblocked (allowing i/o to be resumed), and a scan will be activated
2808 * to ensure that all luns are detected.
2809 *
2810 * Called from normal process context only - cannot be called from interrupt.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002811 *
2812 * Notes:
2813 * This routine assumes no locks are held on entry.
Rob Landleyeb448202007-11-03 13:30:39 -05002814 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002815void
2816fc_remote_port_delete(struct fc_rport *rport)
2817{
James Smartaedf3492006-04-10 10:14:05 -04002818 struct Scsi_Host *shost = rport_to_shost(rport);
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04002819 int timeout = rport->dev_loss_tmo;
James Smartaedf3492006-04-10 10:14:05 -04002820 unsigned long flags;
2821
2822 /*
2823 * No need to flush the fc_host work_q's, as all adds are synchronous.
2824 *
2825 * We do need to reclaim the rport scan work element, so eventually
2826 * (in fc_rport_final_delete()) we'll flush the scsi host work_q if
2827 * there's still a scan pending.
2828 */
2829
2830 spin_lock_irqsave(shost->host_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002831
James Smart92740b22007-04-27 11:53:17 -04002832 if (rport->port_state != FC_PORTSTATE_ONLINE) {
James Smartaedf3492006-04-10 10:14:05 -04002833 spin_unlock_irqrestore(shost->host_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002834 return;
2835 }
2836
James Smart92740b22007-04-27 11:53:17 -04002837 /*
2838 * In the past, we if this was not an FCP-Target, we would
2839 * unconditionally just jump to deleting the rport.
2840 * However, rports can be used as node containers by the LLDD,
2841 * and its not appropriate to just terminate the rport at the
2842 * first sign of a loss in connectivity. The LLDD may want to
2843 * send ELS traffic to re-validate the login. If the rport is
2844 * immediately deleted, it makes it inappropriate for a node
2845 * container.
2846 * So... we now unconditionally wait dev_loss_tmo before
2847 * destroying an rport.
2848 */
2849
James Smartaedf3492006-04-10 10:14:05 -04002850 rport->port_state = FC_PORTSTATE_BLOCKED;
2851
2852 rport->flags |= FC_RPORT_DEVLOSS_PENDING;
2853
2854 spin_unlock_irqrestore(shost->host_lock, flags);
2855
FUJITA Tomonori75252362007-09-01 02:02:27 +09002856 if (rport->roles & FC_PORT_ROLE_FCP_INITIATOR &&
2857 shost->active_mode & MODE_TARGET)
2858 fc_tgt_it_nexus_destroy(shost, (unsigned long)rport);
2859
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04002860 scsi_target_block(&rport->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002861
James Smart0f29b962006-08-18 17:33:29 -04002862 /* see if we need to kill io faster than waiting for device loss */
2863 if ((rport->fast_io_fail_tmo != -1) &&
Mike Christiefff9d402008-08-19 18:45:23 -05002864 (rport->fast_io_fail_tmo < timeout))
James Smart0f29b962006-08-18 17:33:29 -04002865 fc_queue_devloss_work(shost, &rport->fail_io_work,
2866 rport->fast_io_fail_tmo * HZ);
2867
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04002868 /* cap the length the devices can be blocked until they are deleted */
James Smartaedf3492006-04-10 10:14:05 -04002869 fc_queue_devloss_work(shost, &rport->dev_loss_work, timeout * HZ);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002870}
2871EXPORT_SYMBOL(fc_remote_port_delete);
2872
2873/**
Rob Landleyeb448202007-11-03 13:30:39 -05002874 * fc_remote_port_rolechg - notifies the fc transport that the roles on a remote may have changed.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002875 * @rport: The remote port that changed.
Rob Landleyeb448202007-11-03 13:30:39 -05002876 * @roles: New roles for this port.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002877 *
Rob Landleyeb448202007-11-03 13:30:39 -05002878 * Description: The LLDD calls this routine to notify the transport that the
2879 * roles on a remote port may have changed. The largest effect of this is
Linus Torvalds1da177e2005-04-16 15:20:36 -07002880 * if a port now becomes a FCP Target, it must be allocated a
2881 * scsi target id. If the port is no longer a FCP target, any
2882 * scsi target id value assigned to it will persist in case the
2883 * role changes back to include FCP Target. No changes in the scsi
2884 * midlayer will be invoked if the role changes (in the expectation
2885 * that the role will be resumed. If it doesn't normal error processing
2886 * will take place).
2887 *
2888 * Should not be called from interrupt context.
2889 *
2890 * Notes:
2891 * This routine assumes no locks are held on entry.
Rob Landleyeb448202007-11-03 13:30:39 -05002892 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002893void
2894fc_remote_port_rolechg(struct fc_rport *rport, u32 roles)
2895{
2896 struct Scsi_Host *shost = rport_to_shost(rport);
James Smartaedf3492006-04-10 10:14:05 -04002897 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002898 unsigned long flags;
2899 int create = 0;
FUJITA Tomonori75252362007-09-01 02:02:27 +09002900 int ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002901
Linus Torvalds1da177e2005-04-16 15:20:36 -07002902 spin_lock_irqsave(shost->host_lock, flags);
James Smarta53eb5e2007-04-27 12:41:09 -04002903 if (roles & FC_PORT_ROLE_FCP_TARGET) {
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04002904 if (rport->scsi_target_id == -1) {
2905 rport->scsi_target_id = fc_host->next_target_id++;
2906 create = 1;
James Smarta53eb5e2007-04-27 12:41:09 -04002907 } else if (!(rport->roles & FC_PORT_ROLE_FCP_TARGET))
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04002908 create = 1;
FUJITA Tomonori75252362007-09-01 02:02:27 +09002909 } else if (shost->active_mode & MODE_TARGET) {
2910 ret = fc_tgt_it_nexus_create(shost, (unsigned long)rport,
2911 (char *)&rport->node_name);
2912 if (ret)
2913 printk(KERN_ERR "FC Remore Port tgt nexus failed %d\n",
2914 ret);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002915 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002916
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04002917 rport->roles = roles;
2918
James Smartaedf3492006-04-10 10:14:05 -04002919 spin_unlock_irqrestore(shost->host_lock, flags);
2920
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04002921 if (create) {
2922 /*
2923 * There may have been a delete timer running on the
2924 * port. Ensure that it is cancelled as we now know
2925 * the port is an FCP Target.
2926 * Note: we know the rport is exists and in an online
2927 * state as the LLDD would not have had an rport
2928 * reference to pass us.
2929 *
2930 * Take no action on the del_timer failure as the state
2931 * machine state change will validate the
2932 * transaction.
2933 */
James Smart0f29b962006-08-18 17:33:29 -04002934 if (!cancel_delayed_work(&rport->fail_io_work))
2935 fc_flush_devloss(shost);
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04002936 if (!cancel_delayed_work(&rport->dev_loss_work))
James Smartaedf3492006-04-10 10:14:05 -04002937 fc_flush_devloss(shost);
2938
2939 spin_lock_irqsave(shost->host_lock, flags);
Mike Christiefff9d402008-08-19 18:45:23 -05002940 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT |
2941 FC_RPORT_DEVLOSS_PENDING);
James Smartaedf3492006-04-10 10:14:05 -04002942 spin_unlock_irqrestore(shost->host_lock, flags);
2943
2944 /* ensure any stgt delete functions are done */
2945 fc_flush_work(shost);
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04002946
Linus Torvalds1da177e2005-04-16 15:20:36 -07002947 /* initiate a scan of the target */
James Smartaedf3492006-04-10 10:14:05 -04002948 spin_lock_irqsave(shost->host_lock, flags);
2949 rport->flags |= FC_RPORT_SCAN_PENDING;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002950 scsi_queue_work(shost, &rport->scan_work);
James Smartaedf3492006-04-10 10:14:05 -04002951 spin_unlock_irqrestore(shost->host_lock, flags);
James Smarta0785ed2006-05-11 13:27:09 -04002952 scsi_target_unblock(&rport->dev);
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04002953 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002954}
2955EXPORT_SYMBOL(fc_remote_port_rolechg);
2956
2957/**
Rob Landleyeb448202007-11-03 13:30:39 -05002958 * fc_timeout_deleted_rport - Timeout handler for a deleted remote port.
James Smart92740b22007-04-27 11:53:17 -04002959 * @work: rport target that failed to reappear in the allotted time.
Rob Landleyeb448202007-11-03 13:30:39 -05002960 *
2961 * Description: An attempt to delete a remote port blocks, and if it fails
2962 * to return in the allotted time this gets called.
2963 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002964static void
David Howellsc4028952006-11-22 14:57:56 +00002965fc_timeout_deleted_rport(struct work_struct *work)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002966{
David Howellsc4028952006-11-22 14:57:56 +00002967 struct fc_rport *rport =
2968 container_of(work, struct fc_rport, dev_loss_work.work);
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04002969 struct Scsi_Host *shost = rport_to_shost(rport);
James Smart4be98c02009-01-05 12:14:18 -05002970 struct fc_internal *i = to_fc_internal(shost->transportt);
James Smartaedf3492006-04-10 10:14:05 -04002971 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04002972 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002973
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04002974 spin_lock_irqsave(shost->host_lock, flags);
2975
James Smartaedf3492006-04-10 10:14:05 -04002976 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
2977
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04002978 /*
James Smart92740b22007-04-27 11:53:17 -04002979 * If the port is ONLINE, then it came back. If it was a SCSI
2980 * target, validate it still is. If not, tear down the
2981 * scsi_target on it.
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04002982 */
James Smartaedf3492006-04-10 10:14:05 -04002983 if ((rport->port_state == FC_PORTSTATE_ONLINE) &&
James Smart92740b22007-04-27 11:53:17 -04002984 (rport->scsi_target_id != -1) &&
James Smarta53eb5e2007-04-27 12:41:09 -04002985 !(rport->roles & FC_PORT_ROLE_FCP_TARGET)) {
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04002986 dev_printk(KERN_ERR, &rport->dev,
James Smartaedf3492006-04-10 10:14:05 -04002987 "blocked FC remote port time out: no longer"
2988 " a FCP target, removing starget\n");
James Smartaedf3492006-04-10 10:14:05 -04002989 spin_unlock_irqrestore(shost->host_lock, flags);
James Smarta0785ed2006-05-11 13:27:09 -04002990 scsi_target_unblock(&rport->dev);
2991 fc_queue_work(shost, &rport->stgt_delete_work);
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04002992 return;
2993 }
2994
James Smart92740b22007-04-27 11:53:17 -04002995 /* NOOP state - we're flushing workq's */
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04002996 if (rport->port_state != FC_PORTSTATE_BLOCKED) {
2997 spin_unlock_irqrestore(shost->host_lock, flags);
2998 dev_printk(KERN_ERR, &rport->dev,
James Smart92740b22007-04-27 11:53:17 -04002999 "blocked FC remote port time out: leaving"
3000 " rport%s alone\n",
3001 (rport->scsi_target_id != -1) ? " and starget" : "");
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04003002 return;
3003 }
3004
James Smart92740b22007-04-27 11:53:17 -04003005 if ((fc_host->tgtid_bind_type == FC_TGTID_BIND_NONE) ||
3006 (rport->scsi_target_id == -1)) {
James Smartaedf3492006-04-10 10:14:05 -04003007 list_del(&rport->peers);
3008 rport->port_state = FC_PORTSTATE_DELETED;
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04003009 dev_printk(KERN_ERR, &rport->dev,
James Smart92740b22007-04-27 11:53:17 -04003010 "blocked FC remote port time out: removing"
3011 " rport%s\n",
3012 (rport->scsi_target_id != -1) ? " and starget" : "");
James Smartaedf3492006-04-10 10:14:05 -04003013 fc_queue_work(shost, &rport->rport_delete_work);
3014 spin_unlock_irqrestore(shost->host_lock, flags);
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04003015 return;
3016 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003017
3018 dev_printk(KERN_ERR, &rport->dev,
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04003019 "blocked FC remote port time out: removing target and "
3020 "saving binding\n");
3021
James Smartaedf3492006-04-10 10:14:05 -04003022 list_move_tail(&rport->peers, &fc_host->rport_bindings);
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04003023
3024 /*
3025 * Note: We do not remove or clear the hostdata area. This allows
3026 * host-specific target data to persist along with the
3027 * scsi_target_id. It's up to the host to manage it's hostdata area.
3028 */
3029
3030 /*
3031 * Reinitialize port attributes that may change if the port comes back.
3032 */
3033 rport->maxframe_size = -1;
3034 rport->supported_classes = FC_COS_UNSPECIFIED;
James Smarta53eb5e2007-04-27 12:41:09 -04003035 rport->roles = FC_PORT_ROLE_UNKNOWN;
James Smartaedf3492006-04-10 10:14:05 -04003036 rport->port_state = FC_PORTSTATE_NOTPRESENT;
Mike Christiefff9d402008-08-19 18:45:23 -05003037 rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT;
James Smart4be98c02009-01-05 12:14:18 -05003038 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE;
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04003039
James Smartf78badb2008-12-05 16:29:59 -06003040 /*
3041 * Pre-emptively kill I/O rather than waiting for the work queue
3042 * item to teardown the starget. (FCOE libFC folks prefer this
3043 * and to have the rport_port_id still set when it's done).
3044 */
3045 spin_unlock_irqrestore(shost->host_lock, flags);
3046 fc_terminate_rport_io(rport);
3047
3048 BUG_ON(rport->port_state != FC_PORTSTATE_NOTPRESENT);
3049
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04003050 /* remove the identifiers that aren't used in the consisting binding */
James Smartaedf3492006-04-10 10:14:05 -04003051 switch (fc_host->tgtid_bind_type) {
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04003052 case FC_TGTID_BIND_BY_WWPN:
3053 rport->node_name = -1;
3054 rport->port_id = -1;
3055 break;
3056 case FC_TGTID_BIND_BY_WWNN:
3057 rport->port_name = -1;
3058 rport->port_id = -1;
3059 break;
3060 case FC_TGTID_BIND_BY_ID:
3061 rport->node_name = -1;
3062 rport->port_name = -1;
3063 break;
3064 case FC_TGTID_BIND_NONE: /* to keep compiler happy */
3065 break;
3066 }
3067
Linus Torvalds1da177e2005-04-16 15:20:36 -07003068 /*
3069 * As this only occurs if the remote port (scsi target)
3070 * went away and didn't come back - we'll remove
3071 * all attached scsi devices.
3072 */
James Smarta0785ed2006-05-11 13:27:09 -04003073 fc_queue_work(shost, &rport->stgt_delete_work);
James Smart4be98c02009-01-05 12:14:18 -05003074
3075 /*
3076 * Notify the driver that the rport is now dead. The LLDD will
3077 * also guarantee that any communication to the rport is terminated
3078 *
3079 * Note: we set the CALLBK_DONE flag above to correspond
3080 */
3081 if (i->f->dev_loss_tmo_callbk)
3082 i->f->dev_loss_tmo_callbk(rport);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003083}
3084
James Smart4be98c02009-01-05 12:14:18 -05003085
Linus Torvalds1da177e2005-04-16 15:20:36 -07003086/**
Rob Landleyeb448202007-11-03 13:30:39 -05003087 * fc_timeout_fail_rport_io - Timeout handler for a fast io failing on a disconnected SCSI target.
David Howellsc4028952006-11-22 14:57:56 +00003088 * @work: rport to terminate io on.
James Smart0f29b962006-08-18 17:33:29 -04003089 *
3090 * Notes: Only requests the failure of the io, not that all are flushed
3091 * prior to returning.
Rob Landleyeb448202007-11-03 13:30:39 -05003092 */
James Smart0f29b962006-08-18 17:33:29 -04003093static void
David Howellsc4028952006-11-22 14:57:56 +00003094fc_timeout_fail_rport_io(struct work_struct *work)
James Smart0f29b962006-08-18 17:33:29 -04003095{
David Howellsc4028952006-11-22 14:57:56 +00003096 struct fc_rport *rport =
3097 container_of(work, struct fc_rport, fail_io_work.work);
James Smart0f29b962006-08-18 17:33:29 -04003098
3099 if (rport->port_state != FC_PORTSTATE_BLOCKED)
3100 return;
3101
Mike Christiefff9d402008-08-19 18:45:23 -05003102 rport->flags |= FC_RPORT_FAST_FAIL_TIMEDOUT;
3103 fc_terminate_rport_io(rport);
James Smart0f29b962006-08-18 17:33:29 -04003104}
3105
3106/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07003107 * fc_scsi_scan_rport - called to perform a scsi scan on a remote port.
David Howellsc4028952006-11-22 14:57:56 +00003108 * @work: remote port to be scanned.
Rob Landleyeb448202007-11-03 13:30:39 -05003109 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003110static void
David Howellsc4028952006-11-22 14:57:56 +00003111fc_scsi_scan_rport(struct work_struct *work)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003112{
David Howellsc4028952006-11-22 14:57:56 +00003113 struct fc_rport *rport =
3114 container_of(work, struct fc_rport, scan_work);
James Smartaedf3492006-04-10 10:14:05 -04003115 struct Scsi_Host *shost = rport_to_shost(rport);
Christof Schmitt03f002f2007-08-28 09:31:21 +02003116 struct fc_internal *i = to_fc_internal(shost->transportt);
James.Smart@Emulex.Com42e33142005-12-15 09:56:22 -05003117 unsigned long flags;
3118
James Smartaedf3492006-04-10 10:14:05 -04003119 if ((rport->port_state == FC_PORTSTATE_ONLINE) &&
Christof Schmitt03f002f2007-08-28 09:31:21 +02003120 (rport->roles & FC_PORT_ROLE_FCP_TARGET) &&
3121 !(i->f->disable_target_scan)) {
James Smartaedf3492006-04-10 10:14:05 -04003122 scsi_scan_target(&rport->dev, rport->channel,
3123 rport->scsi_target_id, SCAN_WILD_CARD, 1);
James.Smart@Emulex.Com42e33142005-12-15 09:56:22 -05003124 }
James Smartaedf3492006-04-10 10:14:05 -04003125
3126 spin_lock_irqsave(shost->host_lock, flags);
3127 rport->flags &= ~FC_RPORT_SCAN_PENDING;
James.Smart@Emulex.Com42e33142005-12-15 09:56:22 -05003128 spin_unlock_irqrestore(shost->host_lock, flags);
3129}
3130
3131
James Smarta53eb5e2007-04-27 12:41:09 -04003132/**
Andrew Vasqueza30c3f62008-07-18 08:32:52 -07003133 * fc_vport_setup - allocates and creates a FC virtual port.
James Smarta53eb5e2007-04-27 12:41:09 -04003134 * @shost: scsi host the virtual port is connected to.
3135 * @channel: Channel on shost port connected to.
3136 * @pdev: parent device for vport
3137 * @ids: The world wide names, FC4 port roles, etc for
3138 * the virtual port.
3139 * @ret_vport: The pointer to the created vport.
3140 *
3141 * Allocates and creates the vport structure, calls the parent host
3142 * to instantiate the vport, the completes w/ class and sysfs creation.
3143 *
3144 * Notes:
3145 * This routine assumes no locks are held on entry.
Rob Landleyeb448202007-11-03 13:30:39 -05003146 */
James Smarta53eb5e2007-04-27 12:41:09 -04003147static int
Andrew Vasqueza30c3f62008-07-18 08:32:52 -07003148fc_vport_setup(struct Scsi_Host *shost, int channel, struct device *pdev,
James Smarta53eb5e2007-04-27 12:41:09 -04003149 struct fc_vport_identifiers *ids, struct fc_vport **ret_vport)
3150{
3151 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3152 struct fc_internal *fci = to_fc_internal(shost->transportt);
3153 struct fc_vport *vport;
3154 struct device *dev;
3155 unsigned long flags;
3156 size_t size;
3157 int error;
3158
3159 *ret_vport = NULL;
3160
3161 if ( ! fci->f->vport_create)
3162 return -ENOENT;
3163
3164 size = (sizeof(struct fc_vport) + fci->f->dd_fcvport_size);
3165 vport = kzalloc(size, GFP_KERNEL);
3166 if (unlikely(!vport)) {
Harvey Harrisoncadbd4a2008-07-03 23:47:27 -07003167 printk(KERN_ERR "%s: allocation failure\n", __func__);
James Smarta53eb5e2007-04-27 12:41:09 -04003168 return -ENOMEM;
3169 }
3170
3171 vport->vport_state = FC_VPORT_UNKNOWN;
3172 vport->vport_last_state = FC_VPORT_UNKNOWN;
3173 vport->node_name = ids->node_name;
3174 vport->port_name = ids->port_name;
3175 vport->roles = ids->roles;
3176 vport->vport_type = ids->vport_type;
3177 if (fci->f->dd_fcvport_size)
3178 vport->dd_data = &vport[1];
3179 vport->shost = shost;
3180 vport->channel = channel;
3181 vport->flags = FC_VPORT_CREATING;
James Smart9ef3e4a2007-05-24 19:04:44 -04003182 INIT_WORK(&vport->vport_delete_work, fc_vport_sched_delete);
James Smarta53eb5e2007-04-27 12:41:09 -04003183
3184 spin_lock_irqsave(shost->host_lock, flags);
3185
3186 if (fc_host->npiv_vports_inuse >= fc_host->max_npiv_vports) {
3187 spin_unlock_irqrestore(shost->host_lock, flags);
3188 kfree(vport);
3189 return -ENOSPC;
3190 }
3191 fc_host->npiv_vports_inuse++;
3192 vport->number = fc_host->next_vport_number++;
3193 list_add_tail(&vport->peers, &fc_host->vports);
3194 get_device(&shost->shost_gendev); /* for fc_host->vport list */
3195
3196 spin_unlock_irqrestore(shost->host_lock, flags);
3197
3198 dev = &vport->dev;
3199 device_initialize(dev); /* takes self reference */
3200 dev->parent = get_device(pdev); /* takes parent reference */
3201 dev->release = fc_vport_dev_release;
Kay Sievers71610f52008-12-03 22:41:36 +01003202 dev_set_name(dev, "vport-%d:%d-%d",
3203 shost->host_no, channel, vport->number);
James Smarta53eb5e2007-04-27 12:41:09 -04003204 transport_setup_device(dev);
3205
3206 error = device_add(dev);
3207 if (error) {
3208 printk(KERN_ERR "FC Virtual Port device_add failed\n");
3209 goto delete_vport;
3210 }
3211 transport_add_device(dev);
3212 transport_configure_device(dev);
3213
3214 error = fci->f->vport_create(vport, ids->disable);
3215 if (error) {
3216 printk(KERN_ERR "FC Virtual Port LLDD Create failed\n");
3217 goto delete_vport_all;
3218 }
3219
3220 /*
3221 * if the parent isn't the physical adapter's Scsi_Host, ensure
3222 * the Scsi_Host at least contains ia symlink to the vport.
3223 */
3224 if (pdev != &shost->shost_gendev) {
3225 error = sysfs_create_link(&shost->shost_gendev.kobj,
Kay Sievers71610f52008-12-03 22:41:36 +01003226 &dev->kobj, dev_name(dev));
James Smarta53eb5e2007-04-27 12:41:09 -04003227 if (error)
3228 printk(KERN_ERR
3229 "%s: Cannot create vport symlinks for "
3230 "%s, err=%d\n",
Kay Sievers71610f52008-12-03 22:41:36 +01003231 __func__, dev_name(dev), error);
James Smarta53eb5e2007-04-27 12:41:09 -04003232 }
3233 spin_lock_irqsave(shost->host_lock, flags);
3234 vport->flags &= ~FC_VPORT_CREATING;
3235 spin_unlock_irqrestore(shost->host_lock, flags);
3236
3237 dev_printk(KERN_NOTICE, pdev,
Kay Sievers71610f52008-12-03 22:41:36 +01003238 "%s created via shost%d channel %d\n", dev_name(dev),
James Smarta53eb5e2007-04-27 12:41:09 -04003239 shost->host_no, channel);
3240
3241 *ret_vport = vport;
3242
3243 return 0;
3244
3245delete_vport_all:
3246 transport_remove_device(dev);
3247 device_del(dev);
3248delete_vport:
3249 transport_destroy_device(dev);
3250 spin_lock_irqsave(shost->host_lock, flags);
3251 list_del(&vport->peers);
3252 put_device(&shost->shost_gendev); /* for fc_host->vport list */
3253 fc_host->npiv_vports_inuse--;
3254 spin_unlock_irqrestore(shost->host_lock, flags);
3255 put_device(dev->parent);
3256 kfree(vport);
3257
3258 return error;
3259}
3260
Andrew Vasqueza30c3f62008-07-18 08:32:52 -07003261/**
3262 * fc_vport_create - Admin App or LLDD requests creation of a vport
3263 * @shost: scsi host the virtual port is connected to.
3264 * @channel: channel on shost port connected to.
3265 * @ids: The world wide names, FC4 port roles, etc for
3266 * the virtual port.
3267 *
3268 * Notes:
3269 * This routine assumes no locks are held on entry.
3270 */
3271struct fc_vport *
3272fc_vport_create(struct Scsi_Host *shost, int channel,
3273 struct fc_vport_identifiers *ids)
3274{
3275 int stat;
3276 struct fc_vport *vport;
3277
3278 stat = fc_vport_setup(shost, channel, &shost->shost_gendev,
3279 ids, &vport);
3280 return stat ? NULL : vport;
3281}
3282EXPORT_SYMBOL(fc_vport_create);
James Smarta53eb5e2007-04-27 12:41:09 -04003283
3284/**
3285 * fc_vport_terminate - Admin App or LLDD requests termination of a vport
3286 * @vport: fc_vport to be terminated
3287 *
3288 * Calls the LLDD vport_delete() function, then deallocates and removes
3289 * the vport from the shost and object tree.
3290 *
3291 * Notes:
3292 * This routine assumes no locks are held on entry.
Rob Landleyeb448202007-11-03 13:30:39 -05003293 */
James Smarta53eb5e2007-04-27 12:41:09 -04003294int
3295fc_vport_terminate(struct fc_vport *vport)
3296{
3297 struct Scsi_Host *shost = vport_to_shost(vport);
3298 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3299 struct fc_internal *i = to_fc_internal(shost->transportt);
3300 struct device *dev = &vport->dev;
3301 unsigned long flags;
3302 int stat;
3303
3304 spin_lock_irqsave(shost->host_lock, flags);
3305 if (vport->flags & FC_VPORT_CREATING) {
3306 spin_unlock_irqrestore(shost->host_lock, flags);
3307 return -EBUSY;
3308 }
3309 if (vport->flags & (FC_VPORT_DEL)) {
3310 spin_unlock_irqrestore(shost->host_lock, flags);
3311 return -EALREADY;
3312 }
3313 vport->flags |= FC_VPORT_DELETING;
3314 spin_unlock_irqrestore(shost->host_lock, flags);
3315
3316 if (i->f->vport_delete)
3317 stat = i->f->vport_delete(vport);
3318 else
3319 stat = -ENOENT;
3320
3321 spin_lock_irqsave(shost->host_lock, flags);
3322 vport->flags &= ~FC_VPORT_DELETING;
3323 if (!stat) {
3324 vport->flags |= FC_VPORT_DELETED;
3325 list_del(&vport->peers);
3326 fc_host->npiv_vports_inuse--;
3327 put_device(&shost->shost_gendev); /* for fc_host->vport list */
3328 }
3329 spin_unlock_irqrestore(shost->host_lock, flags);
3330
3331 if (stat)
3332 return stat;
3333
3334 if (dev->parent != &shost->shost_gendev)
Kay Sievers71610f52008-12-03 22:41:36 +01003335 sysfs_remove_link(&shost->shost_gendev.kobj, dev_name(dev));
James Smarta53eb5e2007-04-27 12:41:09 -04003336 transport_remove_device(dev);
3337 device_del(dev);
3338 transport_destroy_device(dev);
3339
3340 /*
3341 * Removing our self-reference should mean our
3342 * release function gets called, which will drop the remaining
3343 * parent reference and free the data structure.
3344 */
3345 put_device(dev); /* for self-reference */
3346
3347 return 0; /* SUCCESS */
3348}
3349EXPORT_SYMBOL(fc_vport_terminate);
3350
James Smart9ef3e4a2007-05-24 19:04:44 -04003351/**
3352 * fc_vport_sched_delete - workq-based delete request for a vport
James Smart9ef3e4a2007-05-24 19:04:44 -04003353 * @work: vport to be deleted.
Rob Landleyeb448202007-11-03 13:30:39 -05003354 */
James Smart9ef3e4a2007-05-24 19:04:44 -04003355static void
3356fc_vport_sched_delete(struct work_struct *work)
3357{
3358 struct fc_vport *vport =
3359 container_of(work, struct fc_vport, vport_delete_work);
3360 int stat;
James Smarta53eb5e2007-04-27 12:41:09 -04003361
James Smart9ef3e4a2007-05-24 19:04:44 -04003362 stat = fc_vport_terminate(vport);
3363 if (stat)
3364 dev_printk(KERN_ERR, vport->dev.parent,
3365 "%s: %s could not be deleted created via "
Harvey Harrisoncadbd4a2008-07-03 23:47:27 -07003366 "shost%d channel %d - error %d\n", __func__,
Kay Sievers71610f52008-12-03 22:41:36 +01003367 dev_name(&vport->dev), vport->shost->host_no,
James Smart9ef3e4a2007-05-24 19:04:44 -04003368 vport->channel, stat);
3369}
3370
3371
James Smart9e4f5e22009-03-26 13:33:19 -04003372/*
3373 * BSG support
3374 */
3375
3376
3377/**
3378 * fc_destroy_bsgjob - routine to teardown/delete a fc bsg job
3379 * @job: fc_bsg_job that is to be torn down
3380 */
3381static void
3382fc_destroy_bsgjob(struct fc_bsg_job *job)
3383{
3384 unsigned long flags;
3385
3386 spin_lock_irqsave(&job->job_lock, flags);
3387 if (job->ref_cnt) {
3388 spin_unlock_irqrestore(&job->job_lock, flags);
3389 return;
3390 }
3391 spin_unlock_irqrestore(&job->job_lock, flags);
3392
3393 put_device(job->dev); /* release reference for the request */
3394
3395 kfree(job->request_payload.sg_list);
3396 kfree(job->reply_payload.sg_list);
3397 kfree(job);
3398}
3399
James Smart9e4f5e22009-03-26 13:33:19 -04003400/**
3401 * fc_bsg_jobdone - completion routine for bsg requests that the LLD has
3402 * completed
3403 * @job: fc_bsg_job that is complete
3404 */
3405static void
3406fc_bsg_jobdone(struct fc_bsg_job *job)
3407{
3408 struct request *req = job->req;
3409 struct request *rsp = req->next_rq;
James Smart9e4f5e22009-03-26 13:33:19 -04003410 int err;
3411
James Smart9e4f5e22009-03-26 13:33:19 -04003412 err = job->req->errors = job->reply->result;
Giridhar Malavalib5c6f772009-06-19 16:26:53 -07003413
James Smart9e4f5e22009-03-26 13:33:19 -04003414 if (err < 0)
3415 /* we're only returning the result field in the reply */
3416 job->req->sense_len = sizeof(uint32_t);
3417 else
3418 job->req->sense_len = job->reply_len;
3419
3420 /* we assume all request payload was transferred, residual == 0 */
3421 req->resid_len = 0;
3422
3423 if (rsp) {
3424 WARN_ON(job->reply->reply_payload_rcv_len > rsp->resid_len);
3425
3426 /* set reply (bidi) residual */
3427 rsp->resid_len -= min(job->reply->reply_payload_rcv_len,
3428 rsp->resid_len);
3429 }
Giridhar Malavalib5c6f772009-06-19 16:26:53 -07003430 blk_complete_request(req);
James Smart9e4f5e22009-03-26 13:33:19 -04003431}
3432
Giridhar Malavalib5c6f772009-06-19 16:26:53 -07003433/**
3434 * fc_bsg_softirq_done - softirq done routine for destroying the bsg requests
Randy Dunlapfe5d20c2009-07-04 13:10:41 -07003435 * @rq: BSG request that holds the job to be destroyed
Giridhar Malavalib5c6f772009-06-19 16:26:53 -07003436 */
3437static void fc_bsg_softirq_done(struct request *rq)
3438{
3439 struct fc_bsg_job *job = rq->special;
3440 unsigned long flags;
3441
3442 spin_lock_irqsave(&job->job_lock, flags);
3443 job->state_flags |= FC_RQST_STATE_DONE;
3444 job->ref_cnt--;
3445 spin_unlock_irqrestore(&job->job_lock, flags);
3446
3447 blk_end_request_all(rq, rq->errors);
3448 fc_destroy_bsgjob(job);
3449}
James Smart9e4f5e22009-03-26 13:33:19 -04003450
3451/**
3452 * fc_bsg_job_timeout - handler for when a bsg request timesout
3453 * @req: request that timed out
3454 */
3455static enum blk_eh_timer_return
3456fc_bsg_job_timeout(struct request *req)
3457{
3458 struct fc_bsg_job *job = (void *) req->special;
3459 struct Scsi_Host *shost = job->shost;
3460 struct fc_internal *i = to_fc_internal(shost->transportt);
3461 unsigned long flags;
3462 int err = 0, done = 0;
3463
3464 if (job->rport && job->rport->port_state == FC_PORTSTATE_BLOCKED)
3465 return BLK_EH_RESET_TIMER;
3466
3467 spin_lock_irqsave(&job->job_lock, flags);
3468 if (job->state_flags & FC_RQST_STATE_DONE)
3469 done = 1;
3470 else
3471 job->ref_cnt++;
3472 spin_unlock_irqrestore(&job->job_lock, flags);
3473
3474 if (!done && i->f->bsg_timeout) {
3475 /* call LLDD to abort the i/o as it has timed out */
3476 err = i->f->bsg_timeout(job);
3477 if (err)
3478 printk(KERN_ERR "ERROR: FC BSG request timeout - LLD "
3479 "abort failed with status %d\n", err);
3480 }
3481
James Smart9e4f5e22009-03-26 13:33:19 -04003482 /* the blk_end_sync_io() doesn't check the error */
Giridhar Malavali47e7e892009-06-19 16:26:54 -07003483 if (done)
3484 return BLK_EH_NOT_HANDLED;
3485 else
3486 return BLK_EH_HANDLED;
James Smart9e4f5e22009-03-26 13:33:19 -04003487}
3488
James Smart9e4f5e22009-03-26 13:33:19 -04003489static int
3490fc_bsg_map_buffer(struct fc_bsg_buffer *buf, struct request *req)
3491{
3492 size_t sz = (sizeof(struct scatterlist) * req->nr_phys_segments);
3493
3494 BUG_ON(!req->nr_phys_segments);
3495
3496 buf->sg_list = kzalloc(sz, GFP_KERNEL);
3497 if (!buf->sg_list)
3498 return -ENOMEM;
3499 sg_init_table(buf->sg_list, req->nr_phys_segments);
3500 buf->sg_cnt = blk_rq_map_sg(req->q, req, buf->sg_list);
3501 buf->payload_len = blk_rq_bytes(req);
3502 return 0;
3503}
3504
3505
3506/**
3507 * fc_req_to_bsgjob - Allocate/create the fc_bsg_job structure for the
3508 * bsg request
3509 * @shost: SCSI Host corresponding to the bsg object
3510 * @rport: (optional) FC Remote Port corresponding to the bsg object
3511 * @req: BSG request that needs a job structure
3512 */
3513static int
3514fc_req_to_bsgjob(struct Scsi_Host *shost, struct fc_rport *rport,
3515 struct request *req)
3516{
3517 struct fc_internal *i = to_fc_internal(shost->transportt);
3518 struct request *rsp = req->next_rq;
3519 struct fc_bsg_job *job;
3520 int ret;
3521
3522 BUG_ON(req->special);
3523
3524 job = kzalloc(sizeof(struct fc_bsg_job) + i->f->dd_bsg_size,
3525 GFP_KERNEL);
3526 if (!job)
3527 return -ENOMEM;
3528
3529 /*
3530 * Note: this is a bit silly.
3531 * The request gets formatted as a SGIO v4 ioctl request, which
3532 * then gets reformatted as a blk request, which then gets
3533 * reformatted as a fc bsg request. And on completion, we have
3534 * to wrap return results such that SGIO v4 thinks it was a scsi
3535 * status. I hope this was all worth it.
3536 */
3537
3538 req->special = job;
3539 job->shost = shost;
3540 job->rport = rport;
3541 job->req = req;
3542 if (i->f->dd_bsg_size)
3543 job->dd_data = (void *)&job[1];
3544 spin_lock_init(&job->job_lock);
3545 job->request = (struct fc_bsg_request *)req->cmd;
3546 job->request_len = req->cmd_len;
3547 job->reply = req->sense;
3548 job->reply_len = SCSI_SENSE_BUFFERSIZE; /* Size of sense buffer
3549 * allocated */
3550 if (req->bio) {
3551 ret = fc_bsg_map_buffer(&job->request_payload, req);
3552 if (ret)
3553 goto failjob_rls_job;
3554 }
3555 if (rsp && rsp->bio) {
3556 ret = fc_bsg_map_buffer(&job->reply_payload, rsp);
3557 if (ret)
3558 goto failjob_rls_rqst_payload;
3559 }
3560 job->job_done = fc_bsg_jobdone;
3561 if (rport)
3562 job->dev = &rport->dev;
3563 else
3564 job->dev = &shost->shost_gendev;
3565 get_device(job->dev); /* take a reference for the request */
3566
3567 job->ref_cnt = 1;
3568
3569 return 0;
3570
3571
3572failjob_rls_rqst_payload:
3573 kfree(job->request_payload.sg_list);
3574failjob_rls_job:
3575 kfree(job);
3576 return -ENOMEM;
3577}
3578
3579
3580enum fc_dispatch_result {
3581 FC_DISPATCH_BREAK, /* on return, q is locked, break from q loop */
3582 FC_DISPATCH_LOCKED, /* on return, q is locked, continue on */
3583 FC_DISPATCH_UNLOCKED, /* on return, q is unlocked, continue on */
3584};
3585
3586
3587/**
3588 * fc_bsg_host_dispatch - process fc host bsg requests and dispatch to LLDD
3589 * @shost: scsi host rport attached to
3590 * @job: bsg job to be processed
3591 */
3592static enum fc_dispatch_result
3593fc_bsg_host_dispatch(struct request_queue *q, struct Scsi_Host *shost,
3594 struct fc_bsg_job *job)
3595{
3596 struct fc_internal *i = to_fc_internal(shost->transportt);
3597 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */
3598 int ret;
3599
3600 /* Validate the host command */
3601 switch (job->request->msgcode) {
3602 case FC_BSG_HST_ADD_RPORT:
3603 cmdlen += sizeof(struct fc_bsg_host_add_rport);
3604 break;
3605
3606 case FC_BSG_HST_DEL_RPORT:
3607 cmdlen += sizeof(struct fc_bsg_host_del_rport);
3608 break;
3609
3610 case FC_BSG_HST_ELS_NOLOGIN:
3611 cmdlen += sizeof(struct fc_bsg_host_els);
3612 /* there better be a xmt and rcv payloads */
3613 if ((!job->request_payload.payload_len) ||
3614 (!job->reply_payload.payload_len)) {
3615 ret = -EINVAL;
3616 goto fail_host_msg;
3617 }
3618 break;
3619
3620 case FC_BSG_HST_CT:
3621 cmdlen += sizeof(struct fc_bsg_host_ct);
3622 /* there better be xmt and rcv payloads */
3623 if ((!job->request_payload.payload_len) ||
3624 (!job->reply_payload.payload_len)) {
3625 ret = -EINVAL;
3626 goto fail_host_msg;
3627 }
3628 break;
3629
3630 case FC_BSG_HST_VENDOR:
3631 cmdlen += sizeof(struct fc_bsg_host_vendor);
3632 if ((shost->hostt->vendor_id == 0L) ||
3633 (job->request->rqst_data.h_vendor.vendor_id !=
3634 shost->hostt->vendor_id)) {
3635 ret = -ESRCH;
3636 goto fail_host_msg;
3637 }
3638 break;
3639
3640 default:
3641 ret = -EBADR;
3642 goto fail_host_msg;
3643 }
3644
3645 /* check if we really have all the request data needed */
3646 if (job->request_len < cmdlen) {
3647 ret = -ENOMSG;
3648 goto fail_host_msg;
3649 }
3650
3651 ret = i->f->bsg_request(job);
3652 if (!ret)
3653 return FC_DISPATCH_UNLOCKED;
3654
3655fail_host_msg:
3656 /* return the errno failure code as the only status */
3657 BUG_ON(job->reply_len < sizeof(uint32_t));
3658 job->reply->result = ret;
3659 job->reply_len = sizeof(uint32_t);
3660 fc_bsg_jobdone(job);
3661 return FC_DISPATCH_UNLOCKED;
3662}
3663
3664
3665/*
3666 * fc_bsg_goose_queue - restart rport queue in case it was stopped
3667 * @rport: rport to be restarted
3668 */
3669static void
3670fc_bsg_goose_queue(struct fc_rport *rport)
3671{
3672 int flagset;
Christof Schmitt39562e72009-06-26 16:30:43 +02003673 unsigned long flags;
James Smart9e4f5e22009-03-26 13:33:19 -04003674
3675 if (!rport->rqst_q)
3676 return;
3677
3678 get_device(&rport->dev);
3679
Christof Schmitt39562e72009-06-26 16:30:43 +02003680 spin_lock_irqsave(rport->rqst_q->queue_lock, flags);
James Smart9e4f5e22009-03-26 13:33:19 -04003681 flagset = test_bit(QUEUE_FLAG_REENTER, &rport->rqst_q->queue_flags) &&
3682 !test_bit(QUEUE_FLAG_REENTER, &rport->rqst_q->queue_flags);
3683 if (flagset)
3684 queue_flag_set(QUEUE_FLAG_REENTER, rport->rqst_q);
3685 __blk_run_queue(rport->rqst_q);
3686 if (flagset)
3687 queue_flag_clear(QUEUE_FLAG_REENTER, rport->rqst_q);
Christof Schmitt39562e72009-06-26 16:30:43 +02003688 spin_unlock_irqrestore(rport->rqst_q->queue_lock, flags);
James Smart9e4f5e22009-03-26 13:33:19 -04003689
3690 put_device(&rport->dev);
3691}
3692
3693
3694/**
3695 * fc_bsg_rport_dispatch - process rport bsg requests and dispatch to LLDD
3696 * @shost: scsi host rport attached to
3697 * @rport: rport request destined to
3698 * @job: bsg job to be processed
3699 */
3700static enum fc_dispatch_result
3701fc_bsg_rport_dispatch(struct request_queue *q, struct Scsi_Host *shost,
3702 struct fc_rport *rport, struct fc_bsg_job *job)
3703{
3704 struct fc_internal *i = to_fc_internal(shost->transportt);
3705 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */
3706 int ret;
3707
3708 /* Validate the rport command */
3709 switch (job->request->msgcode) {
3710 case FC_BSG_RPT_ELS:
3711 cmdlen += sizeof(struct fc_bsg_rport_els);
3712 goto check_bidi;
3713
3714 case FC_BSG_RPT_CT:
3715 cmdlen += sizeof(struct fc_bsg_rport_ct);
3716check_bidi:
3717 /* there better be xmt and rcv payloads */
3718 if ((!job->request_payload.payload_len) ||
3719 (!job->reply_payload.payload_len)) {
3720 ret = -EINVAL;
3721 goto fail_rport_msg;
3722 }
3723 break;
3724 default:
3725 ret = -EBADR;
3726 goto fail_rport_msg;
3727 }
3728
3729 /* check if we really have all the request data needed */
3730 if (job->request_len < cmdlen) {
3731 ret = -ENOMSG;
3732 goto fail_rport_msg;
3733 }
3734
3735 ret = i->f->bsg_request(job);
3736 if (!ret)
3737 return FC_DISPATCH_UNLOCKED;
3738
3739fail_rport_msg:
3740 /* return the errno failure code as the only status */
3741 BUG_ON(job->reply_len < sizeof(uint32_t));
3742 job->reply->result = ret;
3743 job->reply_len = sizeof(uint32_t);
3744 fc_bsg_jobdone(job);
3745 return FC_DISPATCH_UNLOCKED;
3746}
3747
3748
3749/**
3750 * fc_bsg_request_handler - generic handler for bsg requests
3751 * @q: request queue to manage
3752 * @shost: Scsi_Host related to the bsg object
3753 * @rport: FC remote port related to the bsg object (optional)
3754 * @dev: device structure for bsg object
3755 */
3756static void
3757fc_bsg_request_handler(struct request_queue *q, struct Scsi_Host *shost,
3758 struct fc_rport *rport, struct device *dev)
3759{
3760 struct request *req;
3761 struct fc_bsg_job *job;
3762 enum fc_dispatch_result ret;
3763
3764 if (!get_device(dev))
3765 return;
3766
3767 while (!blk_queue_plugged(q)) {
3768 if (rport && (rport->port_state == FC_PORTSTATE_BLOCKED))
3769 break;
3770
3771 req = blk_fetch_request(q);
3772 if (!req)
3773 break;
3774
3775 if (rport && (rport->port_state != FC_PORTSTATE_ONLINE)) {
3776 req->errors = -ENXIO;
3777 spin_unlock_irq(q->queue_lock);
3778 blk_end_request(req, -ENXIO, blk_rq_bytes(req));
3779 spin_lock_irq(q->queue_lock);
3780 continue;
3781 }
3782
3783 spin_unlock_irq(q->queue_lock);
3784
3785 ret = fc_req_to_bsgjob(shost, rport, req);
3786 if (ret) {
3787 req->errors = ret;
3788 blk_end_request(req, ret, blk_rq_bytes(req));
3789 spin_lock_irq(q->queue_lock);
3790 continue;
3791 }
3792
3793 job = req->special;
3794
3795 /* check if we have the msgcode value at least */
3796 if (job->request_len < sizeof(uint32_t)) {
3797 BUG_ON(job->reply_len < sizeof(uint32_t));
3798 job->reply->result = -ENOMSG;
3799 job->reply_len = sizeof(uint32_t);
3800 fc_bsg_jobdone(job);
3801 spin_lock_irq(q->queue_lock);
3802 continue;
3803 }
3804
3805 /* the dispatch routines will unlock the queue_lock */
3806 if (rport)
3807 ret = fc_bsg_rport_dispatch(q, shost, rport, job);
3808 else
3809 ret = fc_bsg_host_dispatch(q, shost, job);
3810
3811 /* did dispatcher hit state that can't process any more */
3812 if (ret == FC_DISPATCH_BREAK)
3813 break;
3814
3815 /* did dispatcher had released the lock */
3816 if (ret == FC_DISPATCH_UNLOCKED)
3817 spin_lock_irq(q->queue_lock);
3818 }
3819
3820 spin_unlock_irq(q->queue_lock);
3821 put_device(dev);
3822 spin_lock_irq(q->queue_lock);
3823}
3824
3825
3826/**
3827 * fc_bsg_host_handler - handler for bsg requests for a fc host
3828 * @q: fc host request queue
3829 */
3830static void
3831fc_bsg_host_handler(struct request_queue *q)
3832{
3833 struct Scsi_Host *shost = q->queuedata;
3834
3835 fc_bsg_request_handler(q, shost, NULL, &shost->shost_gendev);
3836}
3837
3838
3839/**
3840 * fc_bsg_rport_handler - handler for bsg requests for a fc rport
3841 * @q: rport request queue
3842 */
3843static void
3844fc_bsg_rport_handler(struct request_queue *q)
3845{
3846 struct fc_rport *rport = q->queuedata;
3847 struct Scsi_Host *shost = rport_to_shost(rport);
3848
3849 fc_bsg_request_handler(q, shost, rport, &rport->dev);
3850}
3851
3852
3853/**
3854 * fc_bsg_hostadd - Create and add the bsg hooks so we can receive requests
3855 * @shost: shost for fc_host
3856 * @fc_host: fc_host adding the structures to
3857 */
3858static int
3859fc_bsg_hostadd(struct Scsi_Host *shost, struct fc_host_attrs *fc_host)
3860{
3861 struct device *dev = &shost->shost_gendev;
3862 struct fc_internal *i = to_fc_internal(shost->transportt);
3863 struct request_queue *q;
3864 int err;
James Bottomley3c559ea2009-06-21 12:11:43 -05003865 char bsg_name[20];
James Smart9e4f5e22009-03-26 13:33:19 -04003866
3867 fc_host->rqst_q = NULL;
3868
3869 if (!i->f->bsg_request)
3870 return -ENOTSUPP;
3871
3872 snprintf(bsg_name, sizeof(bsg_name),
3873 "fc_host%d", shost->host_no);
3874
3875 q = __scsi_alloc_queue(shost, fc_bsg_host_handler);
3876 if (!q) {
3877 printk(KERN_ERR "fc_host%d: bsg interface failed to "
3878 "initialize - no request queue\n",
3879 shost->host_no);
3880 return -ENOMEM;
3881 }
3882
3883 q->queuedata = shost;
3884 queue_flag_set_unlocked(QUEUE_FLAG_BIDI, q);
Giridhar Malavalib5c6f772009-06-19 16:26:53 -07003885 blk_queue_softirq_done(q, fc_bsg_softirq_done);
James Smart9e4f5e22009-03-26 13:33:19 -04003886 blk_queue_rq_timed_out(q, fc_bsg_job_timeout);
3887 blk_queue_rq_timeout(q, FC_DEFAULT_BSG_TIMEOUT);
3888
3889 err = bsg_register_queue(q, dev, bsg_name, NULL);
3890 if (err) {
3891 printk(KERN_ERR "fc_host%d: bsg interface failed to "
3892 "initialize - register queue\n",
3893 shost->host_no);
3894 blk_cleanup_queue(q);
3895 return err;
3896 }
3897
3898 fc_host->rqst_q = q;
3899 return 0;
3900}
3901
3902
3903/**
3904 * fc_bsg_rportadd - Create and add the bsg hooks so we can receive requests
3905 * @shost: shost that rport is attached to
3906 * @rport: rport that the bsg hooks are being attached to
3907 */
3908static int
3909fc_bsg_rportadd(struct Scsi_Host *shost, struct fc_rport *rport)
3910{
3911 struct device *dev = &rport->dev;
3912 struct fc_internal *i = to_fc_internal(shost->transportt);
3913 struct request_queue *q;
3914 int err;
3915
3916 rport->rqst_q = NULL;
3917
3918 if (!i->f->bsg_request)
3919 return -ENOTSUPP;
3920
3921 q = __scsi_alloc_queue(shost, fc_bsg_rport_handler);
3922 if (!q) {
3923 printk(KERN_ERR "%s: bsg interface failed to "
3924 "initialize - no request queue\n",
3925 dev->kobj.name);
3926 return -ENOMEM;
3927 }
3928
3929 q->queuedata = rport;
3930 queue_flag_set_unlocked(QUEUE_FLAG_BIDI, q);
Giridhar Malavalib5c6f772009-06-19 16:26:53 -07003931 blk_queue_softirq_done(q, fc_bsg_softirq_done);
James Smart9e4f5e22009-03-26 13:33:19 -04003932 blk_queue_rq_timed_out(q, fc_bsg_job_timeout);
3933 blk_queue_rq_timeout(q, BLK_DEFAULT_SG_TIMEOUT);
3934
3935 err = bsg_register_queue(q, dev, NULL, NULL);
3936 if (err) {
3937 printk(KERN_ERR "%s: bsg interface failed to "
3938 "initialize - register queue\n",
3939 dev->kobj.name);
3940 blk_cleanup_queue(q);
3941 return err;
3942 }
3943
3944 rport->rqst_q = q;
3945 return 0;
3946}
3947
3948
3949/**
3950 * fc_bsg_remove - Deletes the bsg hooks on fchosts/rports
3951 * @q: the request_queue that is to be torn down.
3952 */
3953static void
3954fc_bsg_remove(struct request_queue *q)
3955{
3956 if (q) {
3957 bsg_unregister_queue(q);
3958 blk_cleanup_queue(q);
3959 }
3960}
3961
3962
James Smart9ef3e4a2007-05-24 19:04:44 -04003963/* Original Author: Martin Hicks */
3964MODULE_AUTHOR("James Smart");
Linus Torvalds1da177e2005-04-16 15:20:36 -07003965MODULE_DESCRIPTION("FC Transport Attributes");
3966MODULE_LICENSE("GPL");
3967
3968module_init(fc_transport_init);
3969module_exit(fc_transport_exit);