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Merge branch 'for-3.6/core' of git://git.kernel.dk/linux-block
[~shefty/rdma-dev.git] / drivers / scsi / scsi_transport_fc.c
1 /*
2  *  FiberChannel transport specific attributes exported to sysfs.
3  *
4  *  Copyright (c) 2003 Silicon Graphics, Inc.  All rights reserved.
5  *
6  *  This program is free software; you can redistribute it and/or modify
7  *  it under the terms of the GNU General Public License as published by
8  *  the Free Software Foundation; either version 2 of the License, or
9  *  (at your option) any later version.
10  *
11  *  This program is distributed in the hope that it will be useful,
12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  *  GNU General Public License for more details.
15  *
16  *  You should have received a copy of the GNU General Public License
17  *  along with this program; if not, write to the Free Software
18  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
19  *
20  *  ========
21  *
22  *  Copyright (C) 2004-2007   James Smart, Emulex Corporation
23  *    Rewrite for host, target, device, and remote port attributes,
24  *    statistics, and service functions...
25  *    Add vports, etc
26  *
27  */
28 #include <linux/module.h>
29 #include <linux/init.h>
30 #include <linux/slab.h>
31 #include <linux/delay.h>
32 #include <linux/kernel.h>
33 #include <scsi/scsi_device.h>
34 #include <scsi/scsi_host.h>
35 #include <scsi/scsi_transport.h>
36 #include <scsi/scsi_transport_fc.h>
37 #include <scsi/scsi_cmnd.h>
38 #include <linux/netlink.h>
39 #include <net/netlink.h>
40 #include <scsi/scsi_netlink_fc.h>
41 #include <scsi/scsi_bsg_fc.h>
42 #include "scsi_priv.h"
43 #include "scsi_transport_fc_internal.h"
44
45 static int fc_queue_work(struct Scsi_Host *, struct work_struct *);
46 static void fc_vport_sched_delete(struct work_struct *work);
47 static int fc_vport_setup(struct Scsi_Host *shost, int channel,
48         struct device *pdev, struct fc_vport_identifiers  *ids,
49         struct fc_vport **vport);
50 static int fc_bsg_hostadd(struct Scsi_Host *, struct fc_host_attrs *);
51 static int fc_bsg_rportadd(struct Scsi_Host *, struct fc_rport *);
52 static void fc_bsg_remove(struct request_queue *);
53 static void fc_bsg_goose_queue(struct fc_rport *);
54
55 /*
56  * Module Parameters
57  */
58
59 /*
60  * dev_loss_tmo: the default number of seconds that the FC transport
61  *   should insulate the loss of a remote port.
62  *   The maximum will be capped by the value of SCSI_DEVICE_BLOCK_MAX_TIMEOUT.
63  */
64 static unsigned int fc_dev_loss_tmo = 60;               /* seconds */
65
66 module_param_named(dev_loss_tmo, fc_dev_loss_tmo, uint, S_IRUGO|S_IWUSR);
67 MODULE_PARM_DESC(dev_loss_tmo,
68                  "Maximum number of seconds that the FC transport should"
69                  " insulate the loss of a remote port. Once this value is"
70                  " exceeded, the scsi target is removed. Value should be"
71                  " between 1 and SCSI_DEVICE_BLOCK_MAX_TIMEOUT if"
72                  " fast_io_fail_tmo is not set.");
73
74 /*
75  * Redefine so that we can have same named attributes in the
76  * sdev/starget/host objects.
77  */
78 #define FC_DEVICE_ATTR(_prefix,_name,_mode,_show,_store)                \
79 struct device_attribute device_attr_##_prefix##_##_name =       \
80         __ATTR(_name,_mode,_show,_store)
81
82 #define fc_enum_name_search(title, table_type, table)                   \
83 static const char *get_fc_##title##_name(enum table_type table_key)     \
84 {                                                                       \
85         int i;                                                          \
86         char *name = NULL;                                              \
87                                                                         \
88         for (i = 0; i < ARRAY_SIZE(table); i++) {                       \
89                 if (table[i].value == table_key) {                      \
90                         name = table[i].name;                           \
91                         break;                                          \
92                 }                                                       \
93         }                                                               \
94         return name;                                                    \
95 }
96
97 #define fc_enum_name_match(title, table_type, table)                    \
98 static int get_fc_##title##_match(const char *table_key,                \
99                 enum table_type *value)                                 \
100 {                                                                       \
101         int i;                                                          \
102                                                                         \
103         for (i = 0; i < ARRAY_SIZE(table); i++) {                       \
104                 if (strncmp(table_key, table[i].name,                   \
105                                 table[i].matchlen) == 0) {              \
106                         *value = table[i].value;                        \
107                         return 0; /* success */                         \
108                 }                                                       \
109         }                                                               \
110         return 1; /* failure */                                         \
111 }
112
113
114 /* Convert fc_port_type values to ascii string name */
115 static struct {
116         enum fc_port_type       value;
117         char                    *name;
118 } fc_port_type_names[] = {
119         { FC_PORTTYPE_UNKNOWN,          "Unknown" },
120         { FC_PORTTYPE_OTHER,            "Other" },
121         { FC_PORTTYPE_NOTPRESENT,       "Not Present" },
122         { FC_PORTTYPE_NPORT,    "NPort (fabric via point-to-point)" },
123         { FC_PORTTYPE_NLPORT,   "NLPort (fabric via loop)" },
124         { FC_PORTTYPE_LPORT,    "LPort (private loop)" },
125         { FC_PORTTYPE_PTP,      "Point-To-Point (direct nport connection)" },
126         { FC_PORTTYPE_NPIV,             "NPIV VPORT" },
127 };
128 fc_enum_name_search(port_type, fc_port_type, fc_port_type_names)
129 #define FC_PORTTYPE_MAX_NAMELEN         50
130
131 /* Reuse fc_port_type enum function for vport_type */
132 #define get_fc_vport_type_name get_fc_port_type_name
133
134
135 /* Convert fc_host_event_code values to ascii string name */
136 static const struct {
137         enum fc_host_event_code         value;
138         char                            *name;
139 } fc_host_event_code_names[] = {
140         { FCH_EVT_LIP,                  "lip" },
141         { FCH_EVT_LINKUP,               "link_up" },
142         { FCH_EVT_LINKDOWN,             "link_down" },
143         { FCH_EVT_LIPRESET,             "lip_reset" },
144         { FCH_EVT_RSCN,                 "rscn" },
145         { FCH_EVT_ADAPTER_CHANGE,       "adapter_chg" },
146         { FCH_EVT_PORT_UNKNOWN,         "port_unknown" },
147         { FCH_EVT_PORT_ONLINE,          "port_online" },
148         { FCH_EVT_PORT_OFFLINE,         "port_offline" },
149         { FCH_EVT_PORT_FABRIC,          "port_fabric" },
150         { FCH_EVT_LINK_UNKNOWN,         "link_unknown" },
151         { FCH_EVT_VENDOR_UNIQUE,        "vendor_unique" },
152 };
153 fc_enum_name_search(host_event_code, fc_host_event_code,
154                 fc_host_event_code_names)
155 #define FC_HOST_EVENT_CODE_MAX_NAMELEN  30
156
157
158 /* Convert fc_port_state values to ascii string name */
159 static struct {
160         enum fc_port_state      value;
161         char                    *name;
162 } fc_port_state_names[] = {
163         { FC_PORTSTATE_UNKNOWN,         "Unknown" },
164         { FC_PORTSTATE_NOTPRESENT,      "Not Present" },
165         { FC_PORTSTATE_ONLINE,          "Online" },
166         { FC_PORTSTATE_OFFLINE,         "Offline" },
167         { FC_PORTSTATE_BLOCKED,         "Blocked" },
168         { FC_PORTSTATE_BYPASSED,        "Bypassed" },
169         { FC_PORTSTATE_DIAGNOSTICS,     "Diagnostics" },
170         { FC_PORTSTATE_LINKDOWN,        "Linkdown" },
171         { FC_PORTSTATE_ERROR,           "Error" },
172         { FC_PORTSTATE_LOOPBACK,        "Loopback" },
173         { FC_PORTSTATE_DELETED,         "Deleted" },
174 };
175 fc_enum_name_search(port_state, fc_port_state, fc_port_state_names)
176 #define FC_PORTSTATE_MAX_NAMELEN        20
177
178
179 /* Convert fc_vport_state values to ascii string name */
180 static struct {
181         enum fc_vport_state     value;
182         char                    *name;
183 } fc_vport_state_names[] = {
184         { FC_VPORT_UNKNOWN,             "Unknown" },
185         { FC_VPORT_ACTIVE,              "Active" },
186         { FC_VPORT_DISABLED,            "Disabled" },
187         { FC_VPORT_LINKDOWN,            "Linkdown" },
188         { FC_VPORT_INITIALIZING,        "Initializing" },
189         { FC_VPORT_NO_FABRIC_SUPP,      "No Fabric Support" },
190         { FC_VPORT_NO_FABRIC_RSCS,      "No Fabric Resources" },
191         { FC_VPORT_FABRIC_LOGOUT,       "Fabric Logout" },
192         { FC_VPORT_FABRIC_REJ_WWN,      "Fabric Rejected WWN" },
193         { FC_VPORT_FAILED,              "VPort Failed" },
194 };
195 fc_enum_name_search(vport_state, fc_vport_state, fc_vport_state_names)
196 #define FC_VPORTSTATE_MAX_NAMELEN       24
197
198 /* Reuse fc_vport_state enum function for vport_last_state */
199 #define get_fc_vport_last_state_name get_fc_vport_state_name
200
201
202 /* Convert fc_tgtid_binding_type values to ascii string name */
203 static const struct {
204         enum fc_tgtid_binding_type      value;
205         char                            *name;
206         int                             matchlen;
207 } fc_tgtid_binding_type_names[] = {
208         { FC_TGTID_BIND_NONE, "none", 4 },
209         { FC_TGTID_BIND_BY_WWPN, "wwpn (World Wide Port Name)", 4 },
210         { FC_TGTID_BIND_BY_WWNN, "wwnn (World Wide Node Name)", 4 },
211         { FC_TGTID_BIND_BY_ID, "port_id (FC Address)", 7 },
212 };
213 fc_enum_name_search(tgtid_bind_type, fc_tgtid_binding_type,
214                 fc_tgtid_binding_type_names)
215 fc_enum_name_match(tgtid_bind_type, fc_tgtid_binding_type,
216                 fc_tgtid_binding_type_names)
217 #define FC_BINDTYPE_MAX_NAMELEN 30
218
219
220 #define fc_bitfield_name_search(title, table)                   \
221 static ssize_t                                                  \
222 get_fc_##title##_names(u32 table_key, char *buf)                \
223 {                                                               \
224         char *prefix = "";                                      \
225         ssize_t len = 0;                                        \
226         int i;                                                  \
227                                                                 \
228         for (i = 0; i < ARRAY_SIZE(table); i++) {               \
229                 if (table[i].value & table_key) {               \
230                         len += sprintf(buf + len, "%s%s",       \
231                                 prefix, table[i].name);         \
232                         prefix = ", ";                          \
233                 }                                               \
234         }                                                       \
235         len += sprintf(buf + len, "\n");                        \
236         return len;                                             \
237 }
238
239
240 /* Convert FC_COS bit values to ascii string name */
241 static const struct {
242         u32                     value;
243         char                    *name;
244 } fc_cos_names[] = {
245         { FC_COS_CLASS1,        "Class 1" },
246         { FC_COS_CLASS2,        "Class 2" },
247         { FC_COS_CLASS3,        "Class 3" },
248         { FC_COS_CLASS4,        "Class 4" },
249         { FC_COS_CLASS6,        "Class 6" },
250 };
251 fc_bitfield_name_search(cos, fc_cos_names)
252
253
254 /* Convert FC_PORTSPEED bit values to ascii string name */
255 static const struct {
256         u32                     value;
257         char                    *name;
258 } fc_port_speed_names[] = {
259         { FC_PORTSPEED_1GBIT,           "1 Gbit" },
260         { FC_PORTSPEED_2GBIT,           "2 Gbit" },
261         { FC_PORTSPEED_4GBIT,           "4 Gbit" },
262         { FC_PORTSPEED_10GBIT,          "10 Gbit" },
263         { FC_PORTSPEED_8GBIT,           "8 Gbit" },
264         { FC_PORTSPEED_16GBIT,          "16 Gbit" },
265         { FC_PORTSPEED_NOT_NEGOTIATED,  "Not Negotiated" },
266 };
267 fc_bitfield_name_search(port_speed, fc_port_speed_names)
268
269
270 static int
271 show_fc_fc4s (char *buf, u8 *fc4_list)
272 {
273         int i, len=0;
274
275         for (i = 0; i < FC_FC4_LIST_SIZE; i++, fc4_list++)
276                 len += sprintf(buf + len , "0x%02x ", *fc4_list);
277         len += sprintf(buf + len, "\n");
278         return len;
279 }
280
281
282 /* Convert FC_PORT_ROLE bit values to ascii string name */
283 static const struct {
284         u32                     value;
285         char                    *name;
286 } fc_port_role_names[] = {
287         { FC_PORT_ROLE_FCP_TARGET,      "FCP Target" },
288         { FC_PORT_ROLE_FCP_INITIATOR,   "FCP Initiator" },
289         { FC_PORT_ROLE_IP_PORT,         "IP Port" },
290 };
291 fc_bitfield_name_search(port_roles, fc_port_role_names)
292
293 /*
294  * Define roles that are specific to port_id. Values are relative to ROLE_MASK.
295  */
296 #define FC_WELLKNOWN_PORTID_MASK        0xfffff0
297 #define FC_WELLKNOWN_ROLE_MASK          0x00000f
298 #define FC_FPORT_PORTID                 0x00000e
299 #define FC_FABCTLR_PORTID               0x00000d
300 #define FC_DIRSRVR_PORTID               0x00000c
301 #define FC_TIMESRVR_PORTID              0x00000b
302 #define FC_MGMTSRVR_PORTID              0x00000a
303
304
305 static void fc_timeout_deleted_rport(struct work_struct *work);
306 static void fc_timeout_fail_rport_io(struct work_struct *work);
307 static void fc_scsi_scan_rport(struct work_struct *work);
308
309 /*
310  * Attribute counts pre object type...
311  * Increase these values if you add attributes
312  */
313 #define FC_STARGET_NUM_ATTRS    3
314 #define FC_RPORT_NUM_ATTRS      10
315 #define FC_VPORT_NUM_ATTRS      9
316 #define FC_HOST_NUM_ATTRS       29
317
318 struct fc_internal {
319         struct scsi_transport_template t;
320         struct fc_function_template *f;
321
322         /*
323          * For attributes : each object has :
324          *   An array of the actual attributes structures
325          *   An array of null-terminated pointers to the attribute
326          *     structures - used for mid-layer interaction.
327          *
328          * The attribute containers for the starget and host are are
329          * part of the midlayer. As the remote port is specific to the
330          * fc transport, we must provide the attribute container.
331          */
332         struct device_attribute private_starget_attrs[
333                                                         FC_STARGET_NUM_ATTRS];
334         struct device_attribute *starget_attrs[FC_STARGET_NUM_ATTRS + 1];
335
336         struct device_attribute private_host_attrs[FC_HOST_NUM_ATTRS];
337         struct device_attribute *host_attrs[FC_HOST_NUM_ATTRS + 1];
338
339         struct transport_container rport_attr_cont;
340         struct device_attribute private_rport_attrs[FC_RPORT_NUM_ATTRS];
341         struct device_attribute *rport_attrs[FC_RPORT_NUM_ATTRS + 1];
342
343         struct transport_container vport_attr_cont;
344         struct device_attribute private_vport_attrs[FC_VPORT_NUM_ATTRS];
345         struct device_attribute *vport_attrs[FC_VPORT_NUM_ATTRS + 1];
346 };
347
348 #define to_fc_internal(tmpl)    container_of(tmpl, struct fc_internal, t)
349
350 static int fc_target_setup(struct transport_container *tc, struct device *dev,
351                            struct device *cdev)
352 {
353         struct scsi_target *starget = to_scsi_target(dev);
354         struct fc_rport *rport = starget_to_rport(starget);
355
356         /*
357          * if parent is remote port, use values from remote port.
358          * Otherwise, this host uses the fc_transport, but not the
359          * remote port interface. As such, initialize to known non-values.
360          */
361         if (rport) {
362                 fc_starget_node_name(starget) = rport->node_name;
363                 fc_starget_port_name(starget) = rport->port_name;
364                 fc_starget_port_id(starget) = rport->port_id;
365         } else {
366                 fc_starget_node_name(starget) = -1;
367                 fc_starget_port_name(starget) = -1;
368                 fc_starget_port_id(starget) = -1;
369         }
370
371         return 0;
372 }
373
374 static DECLARE_TRANSPORT_CLASS(fc_transport_class,
375                                "fc_transport",
376                                fc_target_setup,
377                                NULL,
378                                NULL);
379
380 static int fc_host_setup(struct transport_container *tc, struct device *dev,
381                          struct device *cdev)
382 {
383         struct Scsi_Host *shost = dev_to_shost(dev);
384         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
385
386         /*
387          * Set default values easily detected by the midlayer as
388          * failure cases.  The scsi lldd is responsible for initializing
389          * all transport attributes to valid values per host.
390          */
391         fc_host->node_name = -1;
392         fc_host->port_name = -1;
393         fc_host->permanent_port_name = -1;
394         fc_host->supported_classes = FC_COS_UNSPECIFIED;
395         memset(fc_host->supported_fc4s, 0,
396                 sizeof(fc_host->supported_fc4s));
397         fc_host->supported_speeds = FC_PORTSPEED_UNKNOWN;
398         fc_host->maxframe_size = -1;
399         fc_host->max_npiv_vports = 0;
400         memset(fc_host->serial_number, 0,
401                 sizeof(fc_host->serial_number));
402         memset(fc_host->manufacturer, 0,
403                 sizeof(fc_host->manufacturer));
404         memset(fc_host->model, 0,
405                 sizeof(fc_host->model));
406         memset(fc_host->model_description, 0,
407                 sizeof(fc_host->model_description));
408         memset(fc_host->hardware_version, 0,
409                 sizeof(fc_host->hardware_version));
410         memset(fc_host->driver_version, 0,
411                 sizeof(fc_host->driver_version));
412         memset(fc_host->firmware_version, 0,
413                 sizeof(fc_host->firmware_version));
414         memset(fc_host->optionrom_version, 0,
415                 sizeof(fc_host->optionrom_version));
416
417         fc_host->port_id = -1;
418         fc_host->port_type = FC_PORTTYPE_UNKNOWN;
419         fc_host->port_state = FC_PORTSTATE_UNKNOWN;
420         memset(fc_host->active_fc4s, 0,
421                 sizeof(fc_host->active_fc4s));
422         fc_host->speed = FC_PORTSPEED_UNKNOWN;
423         fc_host->fabric_name = -1;
424         memset(fc_host->symbolic_name, 0, sizeof(fc_host->symbolic_name));
425         memset(fc_host->system_hostname, 0, sizeof(fc_host->system_hostname));
426
427         fc_host->tgtid_bind_type = FC_TGTID_BIND_BY_WWPN;
428
429         INIT_LIST_HEAD(&fc_host->rports);
430         INIT_LIST_HEAD(&fc_host->rport_bindings);
431         INIT_LIST_HEAD(&fc_host->vports);
432         fc_host->next_rport_number = 0;
433         fc_host->next_target_id = 0;
434         fc_host->next_vport_number = 0;
435         fc_host->npiv_vports_inuse = 0;
436
437         snprintf(fc_host->work_q_name, sizeof(fc_host->work_q_name),
438                  "fc_wq_%d", shost->host_no);
439         fc_host->work_q = alloc_workqueue(fc_host->work_q_name, 0, 0);
440         if (!fc_host->work_q)
441                 return -ENOMEM;
442
443         fc_host->dev_loss_tmo = fc_dev_loss_tmo;
444         snprintf(fc_host->devloss_work_q_name,
445                  sizeof(fc_host->devloss_work_q_name),
446                  "fc_dl_%d", shost->host_no);
447         fc_host->devloss_work_q =
448                         alloc_workqueue(fc_host->devloss_work_q_name, 0, 0);
449         if (!fc_host->devloss_work_q) {
450                 destroy_workqueue(fc_host->work_q);
451                 fc_host->work_q = NULL;
452                 return -ENOMEM;
453         }
454
455         fc_bsg_hostadd(shost, fc_host);
456         /* ignore any bsg add error - we just can't do sgio */
457
458         return 0;
459 }
460
461 static int fc_host_remove(struct transport_container *tc, struct device *dev,
462                          struct device *cdev)
463 {
464         struct Scsi_Host *shost = dev_to_shost(dev);
465         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
466
467         fc_bsg_remove(fc_host->rqst_q);
468         return 0;
469 }
470
471 static DECLARE_TRANSPORT_CLASS(fc_host_class,
472                                "fc_host",
473                                fc_host_setup,
474                                fc_host_remove,
475                                NULL);
476
477 /*
478  * Setup and Remove actions for remote ports are handled
479  * in the service functions below.
480  */
481 static DECLARE_TRANSPORT_CLASS(fc_rport_class,
482                                "fc_remote_ports",
483                                NULL,
484                                NULL,
485                                NULL);
486
487 /*
488  * Setup and Remove actions for virtual ports are handled
489  * in the service functions below.
490  */
491 static DECLARE_TRANSPORT_CLASS(fc_vport_class,
492                                "fc_vports",
493                                NULL,
494                                NULL,
495                                NULL);
496
497 /*
498  * Netlink Infrastructure
499  */
500
501 static atomic_t fc_event_seq;
502
503 /**
504  * fc_get_event_number - Obtain the next sequential FC event number
505  *
506  * Notes:
507  *   We could have inlined this, but it would have required fc_event_seq to
508  *   be exposed. For now, live with the subroutine call.
509  *   Atomic used to avoid lock/unlock...
510  */
511 u32
512 fc_get_event_number(void)
513 {
514         return atomic_add_return(1, &fc_event_seq);
515 }
516 EXPORT_SYMBOL(fc_get_event_number);
517
518
519 /**
520  * fc_host_post_event - called to post an even on an fc_host.
521  * @shost:              host the event occurred on
522  * @event_number:       fc event number obtained from get_fc_event_number()
523  * @event_code:         fc_host event being posted
524  * @event_data:         32bits of data for the event being posted
525  *
526  * Notes:
527  *      This routine assumes no locks are held on entry.
528  */
529 void
530 fc_host_post_event(struct Scsi_Host *shost, u32 event_number,
531                 enum fc_host_event_code event_code, u32 event_data)
532 {
533         struct sk_buff *skb;
534         struct nlmsghdr *nlh;
535         struct fc_nl_event *event;
536         const char *name;
537         u32 len, skblen;
538         int err;
539
540         if (!scsi_nl_sock) {
541                 err = -ENOENT;
542                 goto send_fail;
543         }
544
545         len = FC_NL_MSGALIGN(sizeof(*event));
546         skblen = NLMSG_SPACE(len);
547
548         skb = alloc_skb(skblen, GFP_KERNEL);
549         if (!skb) {
550                 err = -ENOBUFS;
551                 goto send_fail;
552         }
553
554         nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG,
555                                 skblen - sizeof(*nlh), 0);
556         if (!nlh) {
557                 err = -ENOBUFS;
558                 goto send_fail_skb;
559         }
560         event = NLMSG_DATA(nlh);
561
562         INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC,
563                                 FC_NL_ASYNC_EVENT, len);
564         event->seconds = get_seconds();
565         event->vendor_id = 0;
566         event->host_no = shost->host_no;
567         event->event_datalen = sizeof(u32);     /* bytes */
568         event->event_num = event_number;
569         event->event_code = event_code;
570         event->event_data = event_data;
571
572         nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS,
573                         GFP_KERNEL);
574         return;
575
576 send_fail_skb:
577         kfree_skb(skb);
578 send_fail:
579         name = get_fc_host_event_code_name(event_code);
580         printk(KERN_WARNING
581                 "%s: Dropped Event : host %d %s data 0x%08x - err %d\n",
582                 __func__, shost->host_no,
583                 (name) ? name : "<unknown>", event_data, err);
584         return;
585 }
586 EXPORT_SYMBOL(fc_host_post_event);
587
588
589 /**
590  * fc_host_post_vendor_event - called to post a vendor unique event on an fc_host
591  * @shost:              host the event occurred on
592  * @event_number:       fc event number obtained from get_fc_event_number()
593  * @data_len:           amount, in bytes, of vendor unique data
594  * @data_buf:           pointer to vendor unique data
595  * @vendor_id:          Vendor id
596  *
597  * Notes:
598  *      This routine assumes no locks are held on entry.
599  */
600 void
601 fc_host_post_vendor_event(struct Scsi_Host *shost, u32 event_number,
602                 u32 data_len, char * data_buf, u64 vendor_id)
603 {
604         struct sk_buff *skb;
605         struct nlmsghdr *nlh;
606         struct fc_nl_event *event;
607         u32 len, skblen;
608         int err;
609
610         if (!scsi_nl_sock) {
611                 err = -ENOENT;
612                 goto send_vendor_fail;
613         }
614
615         len = FC_NL_MSGALIGN(sizeof(*event) + data_len);
616         skblen = NLMSG_SPACE(len);
617
618         skb = alloc_skb(skblen, GFP_KERNEL);
619         if (!skb) {
620                 err = -ENOBUFS;
621                 goto send_vendor_fail;
622         }
623
624         nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG,
625                                 skblen - sizeof(*nlh), 0);
626         if (!nlh) {
627                 err = -ENOBUFS;
628                 goto send_vendor_fail_skb;
629         }
630         event = NLMSG_DATA(nlh);
631
632         INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC,
633                                 FC_NL_ASYNC_EVENT, len);
634         event->seconds = get_seconds();
635         event->vendor_id = vendor_id;
636         event->host_no = shost->host_no;
637         event->event_datalen = data_len;        /* bytes */
638         event->event_num = event_number;
639         event->event_code = FCH_EVT_VENDOR_UNIQUE;
640         memcpy(&event->event_data, data_buf, data_len);
641
642         nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS,
643                         GFP_KERNEL);
644         return;
645
646 send_vendor_fail_skb:
647         kfree_skb(skb);
648 send_vendor_fail:
649         printk(KERN_WARNING
650                 "%s: Dropped Event : host %d vendor_unique - err %d\n",
651                 __func__, shost->host_no, err);
652         return;
653 }
654 EXPORT_SYMBOL(fc_host_post_vendor_event);
655
656
657
658 static __init int fc_transport_init(void)
659 {
660         int error;
661
662         atomic_set(&fc_event_seq, 0);
663
664         error = transport_class_register(&fc_host_class);
665         if (error)
666                 return error;
667         error = transport_class_register(&fc_vport_class);
668         if (error)
669                 goto unreg_host_class;
670         error = transport_class_register(&fc_rport_class);
671         if (error)
672                 goto unreg_vport_class;
673         error = transport_class_register(&fc_transport_class);
674         if (error)
675                 goto unreg_rport_class;
676         return 0;
677
678 unreg_rport_class:
679         transport_class_unregister(&fc_rport_class);
680 unreg_vport_class:
681         transport_class_unregister(&fc_vport_class);
682 unreg_host_class:
683         transport_class_unregister(&fc_host_class);
684         return error;
685 }
686
687 static void __exit fc_transport_exit(void)
688 {
689         transport_class_unregister(&fc_transport_class);
690         transport_class_unregister(&fc_rport_class);
691         transport_class_unregister(&fc_host_class);
692         transport_class_unregister(&fc_vport_class);
693 }
694
695 /*
696  * FC Remote Port Attribute Management
697  */
698
699 #define fc_rport_show_function(field, format_string, sz, cast)          \
700 static ssize_t                                                          \
701 show_fc_rport_##field (struct device *dev,                              \
702                        struct device_attribute *attr, char *buf)        \
703 {                                                                       \
704         struct fc_rport *rport = transport_class_to_rport(dev);         \
705         struct Scsi_Host *shost = rport_to_shost(rport);                \
706         struct fc_internal *i = to_fc_internal(shost->transportt);      \
707         if ((i->f->get_rport_##field) &&                                \
708             !((rport->port_state == FC_PORTSTATE_BLOCKED) ||            \
709               (rport->port_state == FC_PORTSTATE_DELETED) ||            \
710               (rport->port_state == FC_PORTSTATE_NOTPRESENT)))          \
711                 i->f->get_rport_##field(rport);                         \
712         return snprintf(buf, sz, format_string, cast rport->field);     \
713 }
714
715 #define fc_rport_store_function(field)                                  \
716 static ssize_t                                                          \
717 store_fc_rport_##field(struct device *dev,                              \
718                        struct device_attribute *attr,                   \
719                        const char *buf, size_t count)                   \
720 {                                                                       \
721         int val;                                                        \
722         struct fc_rport *rport = transport_class_to_rport(dev);         \
723         struct Scsi_Host *shost = rport_to_shost(rport);                \
724         struct fc_internal *i = to_fc_internal(shost->transportt);      \
725         char *cp;                                                       \
726         if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||              \
727             (rport->port_state == FC_PORTSTATE_DELETED) ||              \
728             (rport->port_state == FC_PORTSTATE_NOTPRESENT))             \
729                 return -EBUSY;                                          \
730         val = simple_strtoul(buf, &cp, 0);                              \
731         if (*cp && (*cp != '\n'))                                       \
732                 return -EINVAL;                                         \
733         i->f->set_rport_##field(rport, val);                            \
734         return count;                                                   \
735 }
736
737 #define fc_rport_rd_attr(field, format_string, sz)                      \
738         fc_rport_show_function(field, format_string, sz, )              \
739 static FC_DEVICE_ATTR(rport, field, S_IRUGO,                    \
740                          show_fc_rport_##field, NULL)
741
742 #define fc_rport_rd_attr_cast(field, format_string, sz, cast)           \
743         fc_rport_show_function(field, format_string, sz, (cast))        \
744 static FC_DEVICE_ATTR(rport, field, S_IRUGO,                    \
745                           show_fc_rport_##field, NULL)
746
747 #define fc_rport_rw_attr(field, format_string, sz)                      \
748         fc_rport_show_function(field, format_string, sz, )              \
749         fc_rport_store_function(field)                                  \
750 static FC_DEVICE_ATTR(rport, field, S_IRUGO | S_IWUSR,          \
751                         show_fc_rport_##field,                          \
752                         store_fc_rport_##field)
753
754
755 #define fc_private_rport_show_function(field, format_string, sz, cast)  \
756 static ssize_t                                                          \
757 show_fc_rport_##field (struct device *dev,                              \
758                        struct device_attribute *attr, char *buf)        \
759 {                                                                       \
760         struct fc_rport *rport = transport_class_to_rport(dev);         \
761         return snprintf(buf, sz, format_string, cast rport->field);     \
762 }
763
764 #define fc_private_rport_rd_attr(field, format_string, sz)              \
765         fc_private_rport_show_function(field, format_string, sz, )      \
766 static FC_DEVICE_ATTR(rport, field, S_IRUGO,                    \
767                          show_fc_rport_##field, NULL)
768
769 #define fc_private_rport_rd_attr_cast(field, format_string, sz, cast)   \
770         fc_private_rport_show_function(field, format_string, sz, (cast)) \
771 static FC_DEVICE_ATTR(rport, field, S_IRUGO,                    \
772                           show_fc_rport_##field, NULL)
773
774
775 #define fc_private_rport_rd_enum_attr(title, maxlen)                    \
776 static ssize_t                                                          \
777 show_fc_rport_##title (struct device *dev,                              \
778                        struct device_attribute *attr, char *buf)        \
779 {                                                                       \
780         struct fc_rport *rport = transport_class_to_rport(dev);         \
781         const char *name;                                               \
782         name = get_fc_##title##_name(rport->title);                     \
783         if (!name)                                                      \
784                 return -EINVAL;                                         \
785         return snprintf(buf, maxlen, "%s\n", name);                     \
786 }                                                                       \
787 static FC_DEVICE_ATTR(rport, title, S_IRUGO,                    \
788                         show_fc_rport_##title, NULL)
789
790
791 #define SETUP_RPORT_ATTRIBUTE_RD(field)                                 \
792         i->private_rport_attrs[count] = device_attr_rport_##field; \
793         i->private_rport_attrs[count].attr.mode = S_IRUGO;              \
794         i->private_rport_attrs[count].store = NULL;                     \
795         i->rport_attrs[count] = &i->private_rport_attrs[count];         \
796         if (i->f->show_rport_##field)                                   \
797                 count++
798
799 #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(field)                         \
800         i->private_rport_attrs[count] = device_attr_rport_##field; \
801         i->private_rport_attrs[count].attr.mode = S_IRUGO;              \
802         i->private_rport_attrs[count].store = NULL;                     \
803         i->rport_attrs[count] = &i->private_rport_attrs[count];         \
804         count++
805
806 #define SETUP_RPORT_ATTRIBUTE_RW(field)                                 \
807         i->private_rport_attrs[count] = device_attr_rport_##field; \
808         if (!i->f->set_rport_##field) {                                 \
809                 i->private_rport_attrs[count].attr.mode = S_IRUGO;      \
810                 i->private_rport_attrs[count].store = NULL;             \
811         }                                                               \
812         i->rport_attrs[count] = &i->private_rport_attrs[count];         \
813         if (i->f->show_rport_##field)                                   \
814                 count++
815
816 #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(field)                         \
817 {                                                                       \
818         i->private_rport_attrs[count] = device_attr_rport_##field; \
819         i->rport_attrs[count] = &i->private_rport_attrs[count];         \
820         count++;                                                        \
821 }
822
823
824 /* The FC Transport Remote Port Attributes: */
825
826 /* Fixed Remote Port Attributes */
827
828 fc_private_rport_rd_attr(maxframe_size, "%u bytes\n", 20);
829
830 static ssize_t
831 show_fc_rport_supported_classes (struct device *dev,
832                                  struct device_attribute *attr, char *buf)
833 {
834         struct fc_rport *rport = transport_class_to_rport(dev);
835         if (rport->supported_classes == FC_COS_UNSPECIFIED)
836                 return snprintf(buf, 20, "unspecified\n");
837         return get_fc_cos_names(rport->supported_classes, buf);
838 }
839 static FC_DEVICE_ATTR(rport, supported_classes, S_IRUGO,
840                 show_fc_rport_supported_classes, NULL);
841
842 /* Dynamic Remote Port Attributes */
843
844 /*
845  * dev_loss_tmo attribute
846  */
847 static int fc_str_to_dev_loss(const char *buf, unsigned long *val)
848 {
849         char *cp;
850
851         *val = simple_strtoul(buf, &cp, 0);
852         if ((*cp && (*cp != '\n')) || (*val < 0))
853                 return -EINVAL;
854         /*
855          * Check for overflow; dev_loss_tmo is u32
856          */
857         if (*val > UINT_MAX)
858                 return -EINVAL;
859
860         return 0;
861 }
862
863 static int fc_rport_set_dev_loss_tmo(struct fc_rport *rport,
864                                      unsigned long val)
865 {
866         struct Scsi_Host *shost = rport_to_shost(rport);
867         struct fc_internal *i = to_fc_internal(shost->transportt);
868
869         if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||
870             (rport->port_state == FC_PORTSTATE_DELETED) ||
871             (rport->port_state == FC_PORTSTATE_NOTPRESENT))
872                 return -EBUSY;
873         /*
874          * Check for overflow; dev_loss_tmo is u32
875          */
876         if (val > UINT_MAX)
877                 return -EINVAL;
878
879         /*
880          * If fast_io_fail is off we have to cap
881          * dev_loss_tmo at SCSI_DEVICE_BLOCK_MAX_TIMEOUT
882          */
883         if (rport->fast_io_fail_tmo == -1 &&
884             val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT)
885                 return -EINVAL;
886
887         i->f->set_rport_dev_loss_tmo(rport, val);
888         return 0;
889 }
890
891 fc_rport_show_function(dev_loss_tmo, "%d\n", 20, )
892 static ssize_t
893 store_fc_rport_dev_loss_tmo(struct device *dev, struct device_attribute *attr,
894                             const char *buf, size_t count)
895 {
896         struct fc_rport *rport = transport_class_to_rport(dev);
897         unsigned long val;
898         int rc;
899
900         rc = fc_str_to_dev_loss(buf, &val);
901         if (rc)
902                 return rc;
903
904         rc = fc_rport_set_dev_loss_tmo(rport, val);
905         if (rc)
906                 return rc;
907         return count;
908 }
909 static FC_DEVICE_ATTR(rport, dev_loss_tmo, S_IRUGO | S_IWUSR,
910                 show_fc_rport_dev_loss_tmo, store_fc_rport_dev_loss_tmo);
911
912
913 /* Private Remote Port Attributes */
914
915 fc_private_rport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
916 fc_private_rport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
917 fc_private_rport_rd_attr(port_id, "0x%06x\n", 20);
918
919 static ssize_t
920 show_fc_rport_roles (struct device *dev, struct device_attribute *attr,
921                      char *buf)
922 {
923         struct fc_rport *rport = transport_class_to_rport(dev);
924
925         /* identify any roles that are port_id specific */
926         if ((rport->port_id != -1) &&
927             (rport->port_id & FC_WELLKNOWN_PORTID_MASK) ==
928                                         FC_WELLKNOWN_PORTID_MASK) {
929                 switch (rport->port_id & FC_WELLKNOWN_ROLE_MASK) {
930                 case FC_FPORT_PORTID:
931                         return snprintf(buf, 30, "Fabric Port\n");
932                 case FC_FABCTLR_PORTID:
933                         return snprintf(buf, 30, "Fabric Controller\n");
934                 case FC_DIRSRVR_PORTID:
935                         return snprintf(buf, 30, "Directory Server\n");
936                 case FC_TIMESRVR_PORTID:
937                         return snprintf(buf, 30, "Time Server\n");
938                 case FC_MGMTSRVR_PORTID:
939                         return snprintf(buf, 30, "Management Server\n");
940                 default:
941                         return snprintf(buf, 30, "Unknown Fabric Entity\n");
942                 }
943         } else {
944                 if (rport->roles == FC_PORT_ROLE_UNKNOWN)
945                         return snprintf(buf, 20, "unknown\n");
946                 return get_fc_port_roles_names(rport->roles, buf);
947         }
948 }
949 static FC_DEVICE_ATTR(rport, roles, S_IRUGO,
950                 show_fc_rport_roles, NULL);
951
952 fc_private_rport_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN);
953 fc_private_rport_rd_attr(scsi_target_id, "%d\n", 20);
954
955 /*
956  * fast_io_fail_tmo attribute
957  */
958 static ssize_t
959 show_fc_rport_fast_io_fail_tmo (struct device *dev,
960                                 struct device_attribute *attr, char *buf)
961 {
962         struct fc_rport *rport = transport_class_to_rport(dev);
963
964         if (rport->fast_io_fail_tmo == -1)
965                 return snprintf(buf, 5, "off\n");
966         return snprintf(buf, 20, "%d\n", rport->fast_io_fail_tmo);
967 }
968
969 static ssize_t
970 store_fc_rport_fast_io_fail_tmo(struct device *dev,
971                                 struct device_attribute *attr, const char *buf,
972                                 size_t count)
973 {
974         int val;
975         char *cp;
976         struct fc_rport *rport = transport_class_to_rport(dev);
977
978         if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||
979             (rport->port_state == FC_PORTSTATE_DELETED) ||
980             (rport->port_state == FC_PORTSTATE_NOTPRESENT))
981                 return -EBUSY;
982         if (strncmp(buf, "off", 3) == 0)
983                 rport->fast_io_fail_tmo = -1;
984         else {
985                 val = simple_strtoul(buf, &cp, 0);
986                 if ((*cp && (*cp != '\n')) || (val < 0))
987                         return -EINVAL;
988                 /*
989                  * Cap fast_io_fail by dev_loss_tmo or
990                  * SCSI_DEVICE_BLOCK_MAX_TIMEOUT.
991                  */
992                 if ((val >= rport->dev_loss_tmo) ||
993                     (val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT))
994                         return -EINVAL;
995
996                 rport->fast_io_fail_tmo = val;
997         }
998         return count;
999 }
1000 static FC_DEVICE_ATTR(rport, fast_io_fail_tmo, S_IRUGO | S_IWUSR,
1001         show_fc_rport_fast_io_fail_tmo, store_fc_rport_fast_io_fail_tmo);
1002
1003
1004 /*
1005  * FC SCSI Target Attribute Management
1006  */
1007
1008 /*
1009  * Note: in the target show function we recognize when the remote
1010  *  port is in the hierarchy and do not allow the driver to get
1011  *  involved in sysfs functions. The driver only gets involved if
1012  *  it's the "old" style that doesn't use rports.
1013  */
1014 #define fc_starget_show_function(field, format_string, sz, cast)        \
1015 static ssize_t                                                          \
1016 show_fc_starget_##field (struct device *dev,                            \
1017                          struct device_attribute *attr, char *buf)      \
1018 {                                                                       \
1019         struct scsi_target *starget = transport_class_to_starget(dev);  \
1020         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);    \
1021         struct fc_internal *i = to_fc_internal(shost->transportt);      \
1022         struct fc_rport *rport = starget_to_rport(starget);             \
1023         if (rport)                                                      \
1024                 fc_starget_##field(starget) = rport->field;             \
1025         else if (i->f->get_starget_##field)                             \
1026                 i->f->get_starget_##field(starget);                     \
1027         return snprintf(buf, sz, format_string,                         \
1028                 cast fc_starget_##field(starget));                      \
1029 }
1030
1031 #define fc_starget_rd_attr(field, format_string, sz)                    \
1032         fc_starget_show_function(field, format_string, sz, )            \
1033 static FC_DEVICE_ATTR(starget, field, S_IRUGO,                  \
1034                          show_fc_starget_##field, NULL)
1035
1036 #define fc_starget_rd_attr_cast(field, format_string, sz, cast)         \
1037         fc_starget_show_function(field, format_string, sz, (cast))      \
1038 static FC_DEVICE_ATTR(starget, field, S_IRUGO,                  \
1039                           show_fc_starget_##field, NULL)
1040
1041 #define SETUP_STARGET_ATTRIBUTE_RD(field)                               \
1042         i->private_starget_attrs[count] = device_attr_starget_##field; \
1043         i->private_starget_attrs[count].attr.mode = S_IRUGO;            \
1044         i->private_starget_attrs[count].store = NULL;                   \
1045         i->starget_attrs[count] = &i->private_starget_attrs[count];     \
1046         if (i->f->show_starget_##field)                                 \
1047                 count++
1048
1049 #define SETUP_STARGET_ATTRIBUTE_RW(field)                               \
1050         i->private_starget_attrs[count] = device_attr_starget_##field; \
1051         if (!i->f->set_starget_##field) {                               \
1052                 i->private_starget_attrs[count].attr.mode = S_IRUGO;    \
1053                 i->private_starget_attrs[count].store = NULL;           \
1054         }                                                               \
1055         i->starget_attrs[count] = &i->private_starget_attrs[count];     \
1056         if (i->f->show_starget_##field)                                 \
1057                 count++
1058
1059 /* The FC Transport SCSI Target Attributes: */
1060 fc_starget_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1061 fc_starget_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
1062 fc_starget_rd_attr(port_id, "0x%06x\n", 20);
1063
1064
1065 /*
1066  * FC Virtual Port Attribute Management
1067  */
1068
1069 #define fc_vport_show_function(field, format_string, sz, cast)          \
1070 static ssize_t                                                          \
1071 show_fc_vport_##field (struct device *dev,                              \
1072                        struct device_attribute *attr, char *buf)        \
1073 {                                                                       \
1074         struct fc_vport *vport = transport_class_to_vport(dev);         \
1075         struct Scsi_Host *shost = vport_to_shost(vport);                \
1076         struct fc_internal *i = to_fc_internal(shost->transportt);      \
1077         if ((i->f->get_vport_##field) &&                                \
1078             !(vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)))       \
1079                 i->f->get_vport_##field(vport);                         \
1080         return snprintf(buf, sz, format_string, cast vport->field);     \
1081 }
1082
1083 #define fc_vport_store_function(field)                                  \
1084 static ssize_t                                                          \
1085 store_fc_vport_##field(struct device *dev,                              \
1086                        struct device_attribute *attr,                   \
1087                        const char *buf, size_t count)                   \
1088 {                                                                       \
1089         int val;                                                        \
1090         struct fc_vport *vport = transport_class_to_vport(dev);         \
1091         struct Scsi_Host *shost = vport_to_shost(vport);                \
1092         struct fc_internal *i = to_fc_internal(shost->transportt);      \
1093         char *cp;                                                       \
1094         if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))  \
1095                 return -EBUSY;                                          \
1096         val = simple_strtoul(buf, &cp, 0);                              \
1097         if (*cp && (*cp != '\n'))                                       \
1098                 return -EINVAL;                                         \
1099         i->f->set_vport_##field(vport, val);                            \
1100         return count;                                                   \
1101 }
1102
1103 #define fc_vport_store_str_function(field, slen)                        \
1104 static ssize_t                                                          \
1105 store_fc_vport_##field(struct device *dev,                              \
1106                        struct device_attribute *attr,                   \
1107                        const char *buf, size_t count)                   \
1108 {                                                                       \
1109         struct fc_vport *vport = transport_class_to_vport(dev);         \
1110         struct Scsi_Host *shost = vport_to_shost(vport);                \
1111         struct fc_internal *i = to_fc_internal(shost->transportt);      \
1112         unsigned int cnt=count;                                         \
1113                                                                         \
1114         /* count may include a LF at end of string */                   \
1115         if (buf[cnt-1] == '\n')                                         \
1116                 cnt--;                                                  \
1117         if (cnt > ((slen) - 1))                                         \
1118                 return -EINVAL;                                         \
1119         memcpy(vport->field, buf, cnt);                                 \
1120         i->f->set_vport_##field(vport);                                 \
1121         return count;                                                   \
1122 }
1123
1124 #define fc_vport_rd_attr(field, format_string, sz)                      \
1125         fc_vport_show_function(field, format_string, sz, )              \
1126 static FC_DEVICE_ATTR(vport, field, S_IRUGO,                    \
1127                          show_fc_vport_##field, NULL)
1128
1129 #define fc_vport_rd_attr_cast(field, format_string, sz, cast)           \
1130         fc_vport_show_function(field, format_string, sz, (cast))        \
1131 static FC_DEVICE_ATTR(vport, field, S_IRUGO,                    \
1132                           show_fc_vport_##field, NULL)
1133
1134 #define fc_vport_rw_attr(field, format_string, sz)                      \
1135         fc_vport_show_function(field, format_string, sz, )              \
1136         fc_vport_store_function(field)                                  \
1137 static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR,          \
1138                         show_fc_vport_##field,                          \
1139                         store_fc_vport_##field)
1140
1141 #define fc_private_vport_show_function(field, format_string, sz, cast)  \
1142 static ssize_t                                                          \
1143 show_fc_vport_##field (struct device *dev,                              \
1144                        struct device_attribute *attr, char *buf)        \
1145 {                                                                       \
1146         struct fc_vport *vport = transport_class_to_vport(dev);         \
1147         return snprintf(buf, sz, format_string, cast vport->field);     \
1148 }
1149
1150 #define fc_private_vport_store_u32_function(field)                      \
1151 static ssize_t                                                          \
1152 store_fc_vport_##field(struct device *dev,                              \
1153                        struct device_attribute *attr,                   \
1154                        const char *buf, size_t count)                   \
1155 {                                                                       \
1156         u32 val;                                                        \
1157         struct fc_vport *vport = transport_class_to_vport(dev);         \
1158         char *cp;                                                       \
1159         if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))          \
1160                 return -EBUSY;                                          \
1161         val = simple_strtoul(buf, &cp, 0);                              \
1162         if (*cp && (*cp != '\n'))                                       \
1163                 return -EINVAL;                                         \
1164         vport->field = val;                                             \
1165         return count;                                                   \
1166 }
1167
1168
1169 #define fc_private_vport_rd_attr(field, format_string, sz)              \
1170         fc_private_vport_show_function(field, format_string, sz, )      \
1171 static FC_DEVICE_ATTR(vport, field, S_IRUGO,                    \
1172                          show_fc_vport_##field, NULL)
1173
1174 #define fc_private_vport_rd_attr_cast(field, format_string, sz, cast)   \
1175         fc_private_vport_show_function(field, format_string, sz, (cast)) \
1176 static FC_DEVICE_ATTR(vport, field, S_IRUGO,                    \
1177                           show_fc_vport_##field, NULL)
1178
1179 #define fc_private_vport_rw_u32_attr(field, format_string, sz)          \
1180         fc_private_vport_show_function(field, format_string, sz, )      \
1181         fc_private_vport_store_u32_function(field)                      \
1182 static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR,          \
1183                         show_fc_vport_##field,                          \
1184                         store_fc_vport_##field)
1185
1186
1187 #define fc_private_vport_rd_enum_attr(title, maxlen)                    \
1188 static ssize_t                                                          \
1189 show_fc_vport_##title (struct device *dev,                              \
1190                        struct device_attribute *attr,                   \
1191                        char *buf)                                       \
1192 {                                                                       \
1193         struct fc_vport *vport = transport_class_to_vport(dev);         \
1194         const char *name;                                               \
1195         name = get_fc_##title##_name(vport->title);                     \
1196         if (!name)                                                      \
1197                 return -EINVAL;                                         \
1198         return snprintf(buf, maxlen, "%s\n", name);                     \
1199 }                                                                       \
1200 static FC_DEVICE_ATTR(vport, title, S_IRUGO,                    \
1201                         show_fc_vport_##title, NULL)
1202
1203
1204 #define SETUP_VPORT_ATTRIBUTE_RD(field)                                 \
1205         i->private_vport_attrs[count] = device_attr_vport_##field; \
1206         i->private_vport_attrs[count].attr.mode = S_IRUGO;              \
1207         i->private_vport_attrs[count].store = NULL;                     \
1208         i->vport_attrs[count] = &i->private_vport_attrs[count];         \
1209         if (i->f->get_##field)                                          \
1210                 count++
1211         /* NOTE: Above MACRO differs: checks function not show bit */
1212
1213 #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(field)                         \
1214         i->private_vport_attrs[count] = device_attr_vport_##field; \
1215         i->private_vport_attrs[count].attr.mode = S_IRUGO;              \
1216         i->private_vport_attrs[count].store = NULL;                     \
1217         i->vport_attrs[count] = &i->private_vport_attrs[count];         \
1218         count++
1219
1220 #define SETUP_VPORT_ATTRIBUTE_WR(field)                                 \
1221         i->private_vport_attrs[count] = device_attr_vport_##field; \
1222         i->vport_attrs[count] = &i->private_vport_attrs[count];         \
1223         if (i->f->field)                                                \
1224                 count++
1225         /* NOTE: Above MACRO differs: checks function */
1226
1227 #define SETUP_VPORT_ATTRIBUTE_RW(field)                                 \
1228         i->private_vport_attrs[count] = device_attr_vport_##field; \
1229         if (!i->f->set_vport_##field) {                                 \
1230                 i->private_vport_attrs[count].attr.mode = S_IRUGO;      \
1231                 i->private_vport_attrs[count].store = NULL;             \
1232         }                                                               \
1233         i->vport_attrs[count] = &i->private_vport_attrs[count];         \
1234         count++
1235         /* NOTE: Above MACRO differs: does not check show bit */
1236
1237 #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RW(field)                         \
1238 {                                                                       \
1239         i->private_vport_attrs[count] = device_attr_vport_##field; \
1240         i->vport_attrs[count] = &i->private_vport_attrs[count];         \
1241         count++;                                                        \
1242 }
1243
1244
1245 /* The FC Transport Virtual Port Attributes: */
1246
1247 /* Fixed Virtual Port Attributes */
1248
1249 /* Dynamic Virtual Port Attributes */
1250
1251 /* Private Virtual Port Attributes */
1252
1253 fc_private_vport_rd_enum_attr(vport_state, FC_VPORTSTATE_MAX_NAMELEN);
1254 fc_private_vport_rd_enum_attr(vport_last_state, FC_VPORTSTATE_MAX_NAMELEN);
1255 fc_private_vport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1256 fc_private_vport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
1257
1258 static ssize_t
1259 show_fc_vport_roles (struct device *dev, struct device_attribute *attr,
1260                      char *buf)
1261 {
1262         struct fc_vport *vport = transport_class_to_vport(dev);
1263
1264         if (vport->roles == FC_PORT_ROLE_UNKNOWN)
1265                 return snprintf(buf, 20, "unknown\n");
1266         return get_fc_port_roles_names(vport->roles, buf);
1267 }
1268 static FC_DEVICE_ATTR(vport, roles, S_IRUGO, show_fc_vport_roles, NULL);
1269
1270 fc_private_vport_rd_enum_attr(vport_type, FC_PORTTYPE_MAX_NAMELEN);
1271
1272 fc_private_vport_show_function(symbolic_name, "%s\n",
1273                 FC_VPORT_SYMBOLIC_NAMELEN + 1, )
1274 fc_vport_store_str_function(symbolic_name, FC_VPORT_SYMBOLIC_NAMELEN)
1275 static FC_DEVICE_ATTR(vport, symbolic_name, S_IRUGO | S_IWUSR,
1276                 show_fc_vport_symbolic_name, store_fc_vport_symbolic_name);
1277
1278 static ssize_t
1279 store_fc_vport_delete(struct device *dev, struct device_attribute *attr,
1280                       const char *buf, size_t count)
1281 {
1282         struct fc_vport *vport = transport_class_to_vport(dev);
1283         struct Scsi_Host *shost = vport_to_shost(vport);
1284         unsigned long flags;
1285
1286         spin_lock_irqsave(shost->host_lock, flags);
1287         if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) {
1288                 spin_unlock_irqrestore(shost->host_lock, flags);
1289                 return -EBUSY;
1290         }
1291         vport->flags |= FC_VPORT_DELETING;
1292         spin_unlock_irqrestore(shost->host_lock, flags);
1293
1294         fc_queue_work(shost, &vport->vport_delete_work);
1295         return count;
1296 }
1297 static FC_DEVICE_ATTR(vport, vport_delete, S_IWUSR,
1298                         NULL, store_fc_vport_delete);
1299
1300
1301 /*
1302  * Enable/Disable vport
1303  *  Write "1" to disable, write "0" to enable
1304  */
1305 static ssize_t
1306 store_fc_vport_disable(struct device *dev, struct device_attribute *attr,
1307                        const char *buf,
1308                            size_t count)
1309 {
1310         struct fc_vport *vport = transport_class_to_vport(dev);
1311         struct Scsi_Host *shost = vport_to_shost(vport);
1312         struct fc_internal *i = to_fc_internal(shost->transportt);
1313         int stat;
1314
1315         if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))
1316                 return -EBUSY;
1317
1318         if (*buf == '0') {
1319                 if (vport->vport_state != FC_VPORT_DISABLED)
1320                         return -EALREADY;
1321         } else if (*buf == '1') {
1322                 if (vport->vport_state == FC_VPORT_DISABLED)
1323                         return -EALREADY;
1324         } else
1325                 return -EINVAL;
1326
1327         stat = i->f->vport_disable(vport, ((*buf == '0') ? false : true));
1328         return stat ? stat : count;
1329 }
1330 static FC_DEVICE_ATTR(vport, vport_disable, S_IWUSR,
1331                         NULL, store_fc_vport_disable);
1332
1333
1334 /*
1335  * Host Attribute Management
1336  */
1337
1338 #define fc_host_show_function(field, format_string, sz, cast)           \
1339 static ssize_t                                                          \
1340 show_fc_host_##field (struct device *dev,                               \
1341                       struct device_attribute *attr, char *buf)         \
1342 {                                                                       \
1343         struct Scsi_Host *shost = transport_class_to_shost(dev);        \
1344         struct fc_internal *i = to_fc_internal(shost->transportt);      \
1345         if (i->f->get_host_##field)                                     \
1346                 i->f->get_host_##field(shost);                          \
1347         return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
1348 }
1349
1350 #define fc_host_store_function(field)                                   \
1351 static ssize_t                                                          \
1352 store_fc_host_##field(struct device *dev,                               \
1353                       struct device_attribute *attr,                    \
1354                       const char *buf,  size_t count)                   \
1355 {                                                                       \
1356         int val;                                                        \
1357         struct Scsi_Host *shost = transport_class_to_shost(dev);        \
1358         struct fc_internal *i = to_fc_internal(shost->transportt);      \
1359         char *cp;                                                       \
1360                                                                         \
1361         val = simple_strtoul(buf, &cp, 0);                              \
1362         if (*cp && (*cp != '\n'))                                       \
1363                 return -EINVAL;                                         \
1364         i->f->set_host_##field(shost, val);                             \
1365         return count;                                                   \
1366 }
1367
1368 #define fc_host_store_str_function(field, slen)                         \
1369 static ssize_t                                                          \
1370 store_fc_host_##field(struct device *dev,                               \
1371                       struct device_attribute *attr,                    \
1372                       const char *buf, size_t count)                    \
1373 {                                                                       \
1374         struct Scsi_Host *shost = transport_class_to_shost(dev);        \
1375         struct fc_internal *i = to_fc_internal(shost->transportt);      \
1376         unsigned int cnt=count;                                         \
1377                                                                         \
1378         /* count may include a LF at end of string */                   \
1379         if (buf[cnt-1] == '\n')                                         \
1380                 cnt--;                                                  \
1381         if (cnt > ((slen) - 1))                                         \
1382                 return -EINVAL;                                         \
1383         memcpy(fc_host_##field(shost), buf, cnt);                       \
1384         i->f->set_host_##field(shost);                                  \
1385         return count;                                                   \
1386 }
1387
1388 #define fc_host_rd_attr(field, format_string, sz)                       \
1389         fc_host_show_function(field, format_string, sz, )               \
1390 static FC_DEVICE_ATTR(host, field, S_IRUGO,                     \
1391                          show_fc_host_##field, NULL)
1392
1393 #define fc_host_rd_attr_cast(field, format_string, sz, cast)            \
1394         fc_host_show_function(field, format_string, sz, (cast))         \
1395 static FC_DEVICE_ATTR(host, field, S_IRUGO,                     \
1396                           show_fc_host_##field, NULL)
1397
1398 #define fc_host_rw_attr(field, format_string, sz)                       \
1399         fc_host_show_function(field, format_string, sz, )               \
1400         fc_host_store_function(field)                                   \
1401 static FC_DEVICE_ATTR(host, field, S_IRUGO | S_IWUSR,           \
1402                         show_fc_host_##field,                           \
1403                         store_fc_host_##field)
1404
1405 #define fc_host_rd_enum_attr(title, maxlen)                             \
1406 static ssize_t                                                          \
1407 show_fc_host_##title (struct device *dev,                               \
1408                       struct device_attribute *attr, char *buf)         \
1409 {                                                                       \
1410         struct Scsi_Host *shost = transport_class_to_shost(dev);        \
1411         struct fc_internal *i = to_fc_internal(shost->transportt);      \
1412         const char *name;                                               \
1413         if (i->f->get_host_##title)                                     \
1414                 i->f->get_host_##title(shost);                          \
1415         name = get_fc_##title##_name(fc_host_##title(shost));           \
1416         if (!name)                                                      \
1417                 return -EINVAL;                                         \
1418         return snprintf(buf, maxlen, "%s\n", name);                     \
1419 }                                                                       \
1420 static FC_DEVICE_ATTR(host, title, S_IRUGO, show_fc_host_##title, NULL)
1421
1422 #define SETUP_HOST_ATTRIBUTE_RD(field)                                  \
1423         i->private_host_attrs[count] = device_attr_host_##field;        \
1424         i->private_host_attrs[count].attr.mode = S_IRUGO;               \
1425         i->private_host_attrs[count].store = NULL;                      \
1426         i->host_attrs[count] = &i->private_host_attrs[count];           \
1427         if (i->f->show_host_##field)                                    \
1428                 count++
1429
1430 #define SETUP_HOST_ATTRIBUTE_RD_NS(field)                               \
1431         i->private_host_attrs[count] = device_attr_host_##field;        \
1432         i->private_host_attrs[count].attr.mode = S_IRUGO;               \
1433         i->private_host_attrs[count].store = NULL;                      \
1434         i->host_attrs[count] = &i->private_host_attrs[count];           \
1435         count++
1436
1437 #define SETUP_HOST_ATTRIBUTE_RW(field)                                  \
1438         i->private_host_attrs[count] = device_attr_host_##field;        \
1439         if (!i->f->set_host_##field) {                                  \
1440                 i->private_host_attrs[count].attr.mode = S_IRUGO;       \
1441                 i->private_host_attrs[count].store = NULL;              \
1442         }                                                               \
1443         i->host_attrs[count] = &i->private_host_attrs[count];           \
1444         if (i->f->show_host_##field)                                    \
1445                 count++
1446
1447
1448 #define fc_private_host_show_function(field, format_string, sz, cast)   \
1449 static ssize_t                                                          \
1450 show_fc_host_##field (struct device *dev,                               \
1451                       struct device_attribute *attr, char *buf)         \
1452 {                                                                       \
1453         struct Scsi_Host *shost = transport_class_to_shost(dev);        \
1454         return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
1455 }
1456
1457 #define fc_private_host_rd_attr(field, format_string, sz)               \
1458         fc_private_host_show_function(field, format_string, sz, )       \
1459 static FC_DEVICE_ATTR(host, field, S_IRUGO,                     \
1460                          show_fc_host_##field, NULL)
1461
1462 #define fc_private_host_rd_attr_cast(field, format_string, sz, cast)    \
1463         fc_private_host_show_function(field, format_string, sz, (cast)) \
1464 static FC_DEVICE_ATTR(host, field, S_IRUGO,                     \
1465                           show_fc_host_##field, NULL)
1466
1467 #define SETUP_PRIVATE_HOST_ATTRIBUTE_RD(field)                  \
1468         i->private_host_attrs[count] = device_attr_host_##field;        \
1469         i->private_host_attrs[count].attr.mode = S_IRUGO;               \
1470         i->private_host_attrs[count].store = NULL;                      \
1471         i->host_attrs[count] = &i->private_host_attrs[count];           \
1472         count++
1473
1474 #define SETUP_PRIVATE_HOST_ATTRIBUTE_RW(field)                  \
1475 {                                                                       \
1476         i->private_host_attrs[count] = device_attr_host_##field;        \
1477         i->host_attrs[count] = &i->private_host_attrs[count];           \
1478         count++;                                                        \
1479 }
1480
1481
1482 /* Fixed Host Attributes */
1483
1484 static ssize_t
1485 show_fc_host_supported_classes (struct device *dev,
1486                                 struct device_attribute *attr, char *buf)
1487 {
1488         struct Scsi_Host *shost = transport_class_to_shost(dev);
1489
1490         if (fc_host_supported_classes(shost) == FC_COS_UNSPECIFIED)
1491                 return snprintf(buf, 20, "unspecified\n");
1492
1493         return get_fc_cos_names(fc_host_supported_classes(shost), buf);
1494 }
1495 static FC_DEVICE_ATTR(host, supported_classes, S_IRUGO,
1496                 show_fc_host_supported_classes, NULL);
1497
1498 static ssize_t
1499 show_fc_host_supported_fc4s (struct device *dev,
1500                              struct device_attribute *attr, char *buf)
1501 {
1502         struct Scsi_Host *shost = transport_class_to_shost(dev);
1503         return (ssize_t)show_fc_fc4s(buf, fc_host_supported_fc4s(shost));
1504 }
1505 static FC_DEVICE_ATTR(host, supported_fc4s, S_IRUGO,
1506                 show_fc_host_supported_fc4s, NULL);
1507
1508 static ssize_t
1509 show_fc_host_supported_speeds (struct device *dev,
1510                                struct device_attribute *attr, char *buf)
1511 {
1512         struct Scsi_Host *shost = transport_class_to_shost(dev);
1513
1514         if (fc_host_supported_speeds(shost) == FC_PORTSPEED_UNKNOWN)
1515                 return snprintf(buf, 20, "unknown\n");
1516
1517         return get_fc_port_speed_names(fc_host_supported_speeds(shost), buf);
1518 }
1519 static FC_DEVICE_ATTR(host, supported_speeds, S_IRUGO,
1520                 show_fc_host_supported_speeds, NULL);
1521
1522
1523 fc_private_host_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1524 fc_private_host_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
1525 fc_private_host_rd_attr_cast(permanent_port_name, "0x%llx\n", 20,
1526                              unsigned long long);
1527 fc_private_host_rd_attr(maxframe_size, "%u bytes\n", 20);
1528 fc_private_host_rd_attr(max_npiv_vports, "%u\n", 20);
1529 fc_private_host_rd_attr(serial_number, "%s\n", (FC_SERIAL_NUMBER_SIZE +1));
1530 fc_private_host_rd_attr(manufacturer, "%s\n", FC_SERIAL_NUMBER_SIZE + 1);
1531 fc_private_host_rd_attr(model, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
1532 fc_private_host_rd_attr(model_description, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
1533 fc_private_host_rd_attr(hardware_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1534 fc_private_host_rd_attr(driver_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1535 fc_private_host_rd_attr(firmware_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1536 fc_private_host_rd_attr(optionrom_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1537
1538
1539 /* Dynamic Host Attributes */
1540
1541 static ssize_t
1542 show_fc_host_active_fc4s (struct device *dev,
1543                           struct device_attribute *attr, char *buf)
1544 {
1545         struct Scsi_Host *shost = transport_class_to_shost(dev);
1546         struct fc_internal *i = to_fc_internal(shost->transportt);
1547
1548         if (i->f->get_host_active_fc4s)
1549                 i->f->get_host_active_fc4s(shost);
1550
1551         return (ssize_t)show_fc_fc4s(buf, fc_host_active_fc4s(shost));
1552 }
1553 static FC_DEVICE_ATTR(host, active_fc4s, S_IRUGO,
1554                 show_fc_host_active_fc4s, NULL);
1555
1556 static ssize_t
1557 show_fc_host_speed (struct device *dev,
1558                     struct device_attribute *attr, char *buf)
1559 {
1560         struct Scsi_Host *shost = transport_class_to_shost(dev);
1561         struct fc_internal *i = to_fc_internal(shost->transportt);
1562
1563         if (i->f->get_host_speed)
1564                 i->f->get_host_speed(shost);
1565
1566         if (fc_host_speed(shost) == FC_PORTSPEED_UNKNOWN)
1567                 return snprintf(buf, 20, "unknown\n");
1568
1569         return get_fc_port_speed_names(fc_host_speed(shost), buf);
1570 }
1571 static FC_DEVICE_ATTR(host, speed, S_IRUGO,
1572                 show_fc_host_speed, NULL);
1573
1574
1575 fc_host_rd_attr(port_id, "0x%06x\n", 20);
1576 fc_host_rd_enum_attr(port_type, FC_PORTTYPE_MAX_NAMELEN);
1577 fc_host_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN);
1578 fc_host_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long);
1579 fc_host_rd_attr(symbolic_name, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
1580
1581 fc_private_host_show_function(system_hostname, "%s\n",
1582                 FC_SYMBOLIC_NAME_SIZE + 1, )
1583 fc_host_store_str_function(system_hostname, FC_SYMBOLIC_NAME_SIZE)
1584 static FC_DEVICE_ATTR(host, system_hostname, S_IRUGO | S_IWUSR,
1585                 show_fc_host_system_hostname, store_fc_host_system_hostname);
1586
1587
1588 /* Private Host Attributes */
1589
1590 static ssize_t
1591 show_fc_private_host_tgtid_bind_type(struct device *dev,
1592                                      struct device_attribute *attr, char *buf)
1593 {
1594         struct Scsi_Host *shost = transport_class_to_shost(dev);
1595         const char *name;
1596
1597         name = get_fc_tgtid_bind_type_name(fc_host_tgtid_bind_type(shost));
1598         if (!name)
1599                 return -EINVAL;
1600         return snprintf(buf, FC_BINDTYPE_MAX_NAMELEN, "%s\n", name);
1601 }
1602
1603 #define get_list_head_entry(pos, head, member)          \
1604         pos = list_entry((head)->next, typeof(*pos), member)
1605
1606 static ssize_t
1607 store_fc_private_host_tgtid_bind_type(struct device *dev,
1608         struct device_attribute *attr, const char *buf, size_t count)
1609 {
1610         struct Scsi_Host *shost = transport_class_to_shost(dev);
1611         struct fc_rport *rport;
1612         enum fc_tgtid_binding_type val;
1613         unsigned long flags;
1614
1615         if (get_fc_tgtid_bind_type_match(buf, &val))
1616                 return -EINVAL;
1617
1618         /* if changing bind type, purge all unused consistent bindings */
1619         if (val != fc_host_tgtid_bind_type(shost)) {
1620                 spin_lock_irqsave(shost->host_lock, flags);
1621                 while (!list_empty(&fc_host_rport_bindings(shost))) {
1622                         get_list_head_entry(rport,
1623                                 &fc_host_rport_bindings(shost), peers);
1624                         list_del(&rport->peers);
1625                         rport->port_state = FC_PORTSTATE_DELETED;
1626                         fc_queue_work(shost, &rport->rport_delete_work);
1627                 }
1628                 spin_unlock_irqrestore(shost->host_lock, flags);
1629         }
1630
1631         fc_host_tgtid_bind_type(shost) = val;
1632         return count;
1633 }
1634
1635 static FC_DEVICE_ATTR(host, tgtid_bind_type, S_IRUGO | S_IWUSR,
1636                         show_fc_private_host_tgtid_bind_type,
1637                         store_fc_private_host_tgtid_bind_type);
1638
1639 static ssize_t
1640 store_fc_private_host_issue_lip(struct device *dev,
1641         struct device_attribute *attr, const char *buf, size_t count)
1642 {
1643         struct Scsi_Host *shost = transport_class_to_shost(dev);
1644         struct fc_internal *i = to_fc_internal(shost->transportt);
1645         int ret;
1646
1647         /* ignore any data value written to the attribute */
1648         if (i->f->issue_fc_host_lip) {
1649                 ret = i->f->issue_fc_host_lip(shost);
1650                 return ret ? ret: count;
1651         }
1652
1653         return -ENOENT;
1654 }
1655
1656 static FC_DEVICE_ATTR(host, issue_lip, S_IWUSR, NULL,
1657                         store_fc_private_host_issue_lip);
1658
1659 static ssize_t
1660 store_fc_private_host_dev_loss_tmo(struct device *dev,
1661                                    struct device_attribute *attr,
1662                                    const char *buf, size_t count)
1663 {
1664         struct Scsi_Host *shost = transport_class_to_shost(dev);
1665         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1666         struct fc_rport *rport;
1667         unsigned long val, flags;
1668         int rc;
1669
1670         rc = fc_str_to_dev_loss(buf, &val);
1671         if (rc)
1672                 return rc;
1673
1674         fc_host_dev_loss_tmo(shost) = val;
1675         spin_lock_irqsave(shost->host_lock, flags);
1676         list_for_each_entry(rport, &fc_host->rports, peers)
1677                 fc_rport_set_dev_loss_tmo(rport, val);
1678         spin_unlock_irqrestore(shost->host_lock, flags);
1679         return count;
1680 }
1681
1682 fc_private_host_show_function(dev_loss_tmo, "%d\n", 20, );
1683 static FC_DEVICE_ATTR(host, dev_loss_tmo, S_IRUGO | S_IWUSR,
1684                       show_fc_host_dev_loss_tmo,
1685                       store_fc_private_host_dev_loss_tmo);
1686
1687 fc_private_host_rd_attr(npiv_vports_inuse, "%u\n", 20);
1688
1689 /*
1690  * Host Statistics Management
1691  */
1692
1693 /* Show a given an attribute in the statistics group */
1694 static ssize_t
1695 fc_stat_show(const struct device *dev, char *buf, unsigned long offset)
1696 {
1697         struct Scsi_Host *shost = transport_class_to_shost(dev);
1698         struct fc_internal *i = to_fc_internal(shost->transportt);
1699         struct fc_host_statistics *stats;
1700         ssize_t ret = -ENOENT;
1701
1702         if (offset > sizeof(struct fc_host_statistics) ||
1703             offset % sizeof(u64) != 0)
1704                 WARN_ON(1);
1705
1706         if (i->f->get_fc_host_stats) {
1707                 stats = (i->f->get_fc_host_stats)(shost);
1708                 if (stats)
1709                         ret = snprintf(buf, 20, "0x%llx\n",
1710                               (unsigned long long)*(u64 *)(((u8 *) stats) + offset));
1711         }
1712         return ret;
1713 }
1714
1715
1716 /* generate a read-only statistics attribute */
1717 #define fc_host_statistic(name)                                         \
1718 static ssize_t show_fcstat_##name(struct device *cd,                    \
1719                                   struct device_attribute *attr,        \
1720                                   char *buf)                            \
1721 {                                                                       \
1722         return fc_stat_show(cd, buf,                                    \
1723                             offsetof(struct fc_host_statistics, name)); \
1724 }                                                                       \
1725 static FC_DEVICE_ATTR(host, name, S_IRUGO, show_fcstat_##name, NULL)
1726
1727 fc_host_statistic(seconds_since_last_reset);
1728 fc_host_statistic(tx_frames);
1729 fc_host_statistic(tx_words);
1730 fc_host_statistic(rx_frames);
1731 fc_host_statistic(rx_words);
1732 fc_host_statistic(lip_count);
1733 fc_host_statistic(nos_count);
1734 fc_host_statistic(error_frames);
1735 fc_host_statistic(dumped_frames);
1736 fc_host_statistic(link_failure_count);
1737 fc_host_statistic(loss_of_sync_count);
1738 fc_host_statistic(loss_of_signal_count);
1739 fc_host_statistic(prim_seq_protocol_err_count);
1740 fc_host_statistic(invalid_tx_word_count);
1741 fc_host_statistic(invalid_crc_count);
1742 fc_host_statistic(fcp_input_requests);
1743 fc_host_statistic(fcp_output_requests);
1744 fc_host_statistic(fcp_control_requests);
1745 fc_host_statistic(fcp_input_megabytes);
1746 fc_host_statistic(fcp_output_megabytes);
1747 fc_host_statistic(fcp_packet_alloc_failures);
1748 fc_host_statistic(fcp_packet_aborts);
1749 fc_host_statistic(fcp_frame_alloc_failures);
1750 fc_host_statistic(fc_no_free_exch);
1751 fc_host_statistic(fc_no_free_exch_xid);
1752 fc_host_statistic(fc_xid_not_found);
1753 fc_host_statistic(fc_xid_busy);
1754 fc_host_statistic(fc_seq_not_found);
1755 fc_host_statistic(fc_non_bls_resp);
1756
1757 static ssize_t
1758 fc_reset_statistics(struct device *dev, struct device_attribute *attr,
1759                     const char *buf, size_t count)
1760 {
1761         struct Scsi_Host *shost = transport_class_to_shost(dev);
1762         struct fc_internal *i = to_fc_internal(shost->transportt);
1763
1764         /* ignore any data value written to the attribute */
1765         if (i->f->reset_fc_host_stats) {
1766                 i->f->reset_fc_host_stats(shost);
1767                 return count;
1768         }
1769
1770         return -ENOENT;
1771 }
1772 static FC_DEVICE_ATTR(host, reset_statistics, S_IWUSR, NULL,
1773                                 fc_reset_statistics);
1774
1775 static struct attribute *fc_statistics_attrs[] = {
1776         &device_attr_host_seconds_since_last_reset.attr,
1777         &device_attr_host_tx_frames.attr,
1778         &device_attr_host_tx_words.attr,
1779         &device_attr_host_rx_frames.attr,
1780         &device_attr_host_rx_words.attr,
1781         &device_attr_host_lip_count.attr,
1782         &device_attr_host_nos_count.attr,
1783         &device_attr_host_error_frames.attr,
1784         &device_attr_host_dumped_frames.attr,
1785         &device_attr_host_link_failure_count.attr,
1786         &device_attr_host_loss_of_sync_count.attr,
1787         &device_attr_host_loss_of_signal_count.attr,
1788         &device_attr_host_prim_seq_protocol_err_count.attr,
1789         &device_attr_host_invalid_tx_word_count.attr,
1790         &device_attr_host_invalid_crc_count.attr,
1791         &device_attr_host_fcp_input_requests.attr,
1792         &device_attr_host_fcp_output_requests.attr,
1793         &device_attr_host_fcp_control_requests.attr,
1794         &device_attr_host_fcp_input_megabytes.attr,
1795         &device_attr_host_fcp_output_megabytes.attr,
1796         &device_attr_host_fcp_packet_alloc_failures.attr,
1797         &device_attr_host_fcp_packet_aborts.attr,
1798         &device_attr_host_fcp_frame_alloc_failures.attr,
1799         &device_attr_host_fc_no_free_exch.attr,
1800         &device_attr_host_fc_no_free_exch_xid.attr,
1801         &device_attr_host_fc_xid_not_found.attr,
1802         &device_attr_host_fc_xid_busy.attr,
1803         &device_attr_host_fc_seq_not_found.attr,
1804         &device_attr_host_fc_non_bls_resp.attr,
1805         &device_attr_host_reset_statistics.attr,
1806         NULL
1807 };
1808
1809 static struct attribute_group fc_statistics_group = {
1810         .name = "statistics",
1811         .attrs = fc_statistics_attrs,
1812 };
1813
1814
1815 /* Host Vport Attributes */
1816
1817 static int
1818 fc_parse_wwn(const char *ns, u64 *nm)
1819 {
1820         unsigned int i, j;
1821         u8 wwn[8];
1822
1823         memset(wwn, 0, sizeof(wwn));
1824
1825         /* Validate and store the new name */
1826         for (i=0, j=0; i < 16; i++) {
1827                 int value;
1828
1829                 value = hex_to_bin(*ns++);
1830                 if (value >= 0)
1831                         j = (j << 4) | value;
1832                 else
1833                         return -EINVAL;
1834                 if (i % 2) {
1835                         wwn[i/2] = j & 0xff;
1836                         j = 0;
1837                 }
1838         }
1839
1840         *nm = wwn_to_u64(wwn);
1841
1842         return 0;
1843 }
1844
1845
1846 /*
1847  * "Short-cut" sysfs variable to create a new vport on a FC Host.
1848  * Input is a string of the form "<WWPN>:<WWNN>". Other attributes
1849  * will default to a NPIV-based FCP_Initiator; The WWNs are specified
1850  * as hex characters, and may *not* contain any prefixes (e.g. 0x, x, etc)
1851  */
1852 static ssize_t
1853 store_fc_host_vport_create(struct device *dev, struct device_attribute *attr,
1854                            const char *buf, size_t count)
1855 {
1856         struct Scsi_Host *shost = transport_class_to_shost(dev);
1857         struct fc_vport_identifiers vid;
1858         struct fc_vport *vport;
1859         unsigned int cnt=count;
1860         int stat;
1861
1862         memset(&vid, 0, sizeof(vid));
1863
1864         /* count may include a LF at end of string */
1865         if (buf[cnt-1] == '\n')
1866                 cnt--;
1867
1868         /* validate we have enough characters for WWPN */
1869         if ((cnt != (16+1+16)) || (buf[16] != ':'))
1870                 return -EINVAL;
1871
1872         stat = fc_parse_wwn(&buf[0], &vid.port_name);
1873         if (stat)
1874                 return stat;
1875
1876         stat = fc_parse_wwn(&buf[17], &vid.node_name);
1877         if (stat)
1878                 return stat;
1879
1880         vid.roles = FC_PORT_ROLE_FCP_INITIATOR;
1881         vid.vport_type = FC_PORTTYPE_NPIV;
1882         /* vid.symbolic_name is already zero/NULL's */
1883         vid.disable = false;            /* always enabled */
1884
1885         /* we only allow support on Channel 0 !!! */
1886         stat = fc_vport_setup(shost, 0, &shost->shost_gendev, &vid, &vport);
1887         return stat ? stat : count;
1888 }
1889 static FC_DEVICE_ATTR(host, vport_create, S_IWUSR, NULL,
1890                         store_fc_host_vport_create);
1891
1892
1893 /*
1894  * "Short-cut" sysfs variable to delete a vport on a FC Host.
1895  * Vport is identified by a string containing "<WWPN>:<WWNN>".
1896  * The WWNs are specified as hex characters, and may *not* contain
1897  * any prefixes (e.g. 0x, x, etc)
1898  */
1899 static ssize_t
1900 store_fc_host_vport_delete(struct device *dev, struct device_attribute *attr,
1901                            const char *buf, size_t count)
1902 {
1903         struct Scsi_Host *shost = transport_class_to_shost(dev);
1904         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1905         struct fc_vport *vport;
1906         u64 wwpn, wwnn;
1907         unsigned long flags;
1908         unsigned int cnt=count;
1909         int stat, match;
1910
1911         /* count may include a LF at end of string */
1912         if (buf[cnt-1] == '\n')
1913                 cnt--;
1914
1915         /* validate we have enough characters for WWPN */
1916         if ((cnt != (16+1+16)) || (buf[16] != ':'))
1917                 return -EINVAL;
1918
1919         stat = fc_parse_wwn(&buf[0], &wwpn);
1920         if (stat)
1921                 return stat;
1922
1923         stat = fc_parse_wwn(&buf[17], &wwnn);
1924         if (stat)
1925                 return stat;
1926
1927         spin_lock_irqsave(shost->host_lock, flags);
1928         match = 0;
1929         /* we only allow support on Channel 0 !!! */
1930         list_for_each_entry(vport, &fc_host->vports, peers) {
1931                 if ((vport->channel == 0) &&
1932                     (vport->port_name == wwpn) && (vport->node_name == wwnn)) {
1933                         if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))
1934                                 break;
1935                         vport->flags |= FC_VPORT_DELETING;
1936                         match = 1;
1937                         break;
1938                 }
1939         }
1940         spin_unlock_irqrestore(shost->host_lock, flags);
1941
1942         if (!match)
1943                 return -ENODEV;
1944
1945         stat = fc_vport_terminate(vport);
1946         return stat ? stat : count;
1947 }
1948 static FC_DEVICE_ATTR(host, vport_delete, S_IWUSR, NULL,
1949                         store_fc_host_vport_delete);
1950
1951
1952 static int fc_host_match(struct attribute_container *cont,
1953                           struct device *dev)
1954 {
1955         struct Scsi_Host *shost;
1956         struct fc_internal *i;
1957
1958         if (!scsi_is_host_device(dev))
1959                 return 0;
1960
1961         shost = dev_to_shost(dev);
1962         if (!shost->transportt  || shost->transportt->host_attrs.ac.class
1963             != &fc_host_class.class)
1964                 return 0;
1965
1966         i = to_fc_internal(shost->transportt);
1967
1968         return &i->t.host_attrs.ac == cont;
1969 }
1970
1971 static int fc_target_match(struct attribute_container *cont,
1972                             struct device *dev)
1973 {
1974         struct Scsi_Host *shost;
1975         struct fc_internal *i;
1976
1977         if (!scsi_is_target_device(dev))
1978                 return 0;
1979
1980         shost = dev_to_shost(dev->parent);
1981         if (!shost->transportt  || shost->transportt->host_attrs.ac.class
1982             != &fc_host_class.class)
1983                 return 0;
1984
1985         i = to_fc_internal(shost->transportt);
1986
1987         return &i->t.target_attrs.ac == cont;
1988 }
1989
1990 static void fc_rport_dev_release(struct device *dev)
1991 {
1992         struct fc_rport *rport = dev_to_rport(dev);
1993         put_device(dev->parent);
1994         kfree(rport);
1995 }
1996
1997 int scsi_is_fc_rport(const struct device *dev)
1998 {
1999         return dev->release == fc_rport_dev_release;
2000 }
2001 EXPORT_SYMBOL(scsi_is_fc_rport);
2002
2003 static int fc_rport_match(struct attribute_container *cont,
2004                             struct device *dev)
2005 {
2006         struct Scsi_Host *shost;
2007         struct fc_internal *i;
2008
2009         if (!scsi_is_fc_rport(dev))
2010                 return 0;
2011
2012         shost = dev_to_shost(dev->parent);
2013         if (!shost->transportt  || shost->transportt->host_attrs.ac.class
2014             != &fc_host_class.class)
2015                 return 0;
2016
2017         i = to_fc_internal(shost->transportt);
2018
2019         return &i->rport_attr_cont.ac == cont;
2020 }
2021
2022
2023 static void fc_vport_dev_release(struct device *dev)
2024 {
2025         struct fc_vport *vport = dev_to_vport(dev);
2026         put_device(dev->parent);                /* release kobj parent */
2027         kfree(vport);
2028 }
2029
2030 int scsi_is_fc_vport(const struct device *dev)
2031 {
2032         return dev->release == fc_vport_dev_release;
2033 }
2034 EXPORT_SYMBOL(scsi_is_fc_vport);
2035
2036 static int fc_vport_match(struct attribute_container *cont,
2037                             struct device *dev)
2038 {
2039         struct fc_vport *vport;
2040         struct Scsi_Host *shost;
2041         struct fc_internal *i;
2042
2043         if (!scsi_is_fc_vport(dev))
2044                 return 0;
2045         vport = dev_to_vport(dev);
2046
2047         shost = vport_to_shost(vport);
2048         if (!shost->transportt  || shost->transportt->host_attrs.ac.class
2049             != &fc_host_class.class)
2050                 return 0;
2051
2052         i = to_fc_internal(shost->transportt);
2053         return &i->vport_attr_cont.ac == cont;
2054 }
2055
2056
2057 /**
2058  * fc_timed_out - FC Transport I/O timeout intercept handler
2059  * @scmd:       The SCSI command which timed out
2060  *
2061  * This routine protects against error handlers getting invoked while a
2062  * rport is in a blocked state, typically due to a temporarily loss of
2063  * connectivity. If the error handlers are allowed to proceed, requests
2064  * to abort i/o, reset the target, etc will likely fail as there is no way
2065  * to communicate with the device to perform the requested function. These
2066  * failures may result in the midlayer taking the device offline, requiring
2067  * manual intervention to restore operation.
2068  *
2069  * This routine, called whenever an i/o times out, validates the state of
2070  * the underlying rport. If the rport is blocked, it returns
2071  * EH_RESET_TIMER, which will continue to reschedule the timeout.
2072  * Eventually, either the device will return, or devloss_tmo will fire,
2073  * and when the timeout then fires, it will be handled normally.
2074  * If the rport is not blocked, normal error handling continues.
2075  *
2076  * Notes:
2077  *      This routine assumes no locks are held on entry.
2078  */
2079 static enum blk_eh_timer_return
2080 fc_timed_out(struct scsi_cmnd *scmd)
2081 {
2082         struct fc_rport *rport = starget_to_rport(scsi_target(scmd->device));
2083
2084         if (rport->port_state == FC_PORTSTATE_BLOCKED)
2085                 return BLK_EH_RESET_TIMER;
2086
2087         return BLK_EH_NOT_HANDLED;
2088 }
2089
2090 /*
2091  * Called by fc_user_scan to locate an rport on the shost that
2092  * matches the channel and target id, and invoke scsi_scan_target()
2093  * on the rport.
2094  */
2095 static void
2096 fc_user_scan_tgt(struct Scsi_Host *shost, uint channel, uint id, uint lun)
2097 {
2098         struct fc_rport *rport;
2099         unsigned long flags;
2100
2101         spin_lock_irqsave(shost->host_lock, flags);
2102
2103         list_for_each_entry(rport, &fc_host_rports(shost), peers) {
2104                 if (rport->scsi_target_id == -1)
2105                         continue;
2106
2107                 if (rport->port_state != FC_PORTSTATE_ONLINE)
2108                         continue;
2109
2110                 if ((channel == rport->channel) &&
2111                     (id == rport->scsi_target_id)) {
2112                         spin_unlock_irqrestore(shost->host_lock, flags);
2113                         scsi_scan_target(&rport->dev, channel, id, lun, 1);
2114                         return;
2115                 }
2116         }
2117
2118         spin_unlock_irqrestore(shost->host_lock, flags);
2119 }
2120
2121 /*
2122  * Called via sysfs scan routines. Necessary, as the FC transport
2123  * wants to place all target objects below the rport object. So this
2124  * routine must invoke the scsi_scan_target() routine with the rport
2125  * object as the parent.
2126  */
2127 static int
2128 fc_user_scan(struct Scsi_Host *shost, uint channel, uint id, uint lun)
2129 {
2130         uint chlo, chhi;
2131         uint tgtlo, tgthi;
2132
2133         if (((channel != SCAN_WILD_CARD) && (channel > shost->max_channel)) ||
2134             ((id != SCAN_WILD_CARD) && (id >= shost->max_id)) ||
2135             ((lun != SCAN_WILD_CARD) && (lun > shost->max_lun)))
2136                 return -EINVAL;
2137
2138         if (channel == SCAN_WILD_CARD) {
2139                 chlo = 0;
2140                 chhi = shost->max_channel + 1;
2141         } else {
2142                 chlo = channel;
2143                 chhi = channel + 1;
2144         }
2145
2146         if (id == SCAN_WILD_CARD) {
2147                 tgtlo = 0;
2148                 tgthi = shost->max_id;
2149         } else {
2150                 tgtlo = id;
2151                 tgthi = id + 1;
2152         }
2153
2154         for ( ; chlo < chhi; chlo++)
2155                 for ( ; tgtlo < tgthi; tgtlo++)
2156                         fc_user_scan_tgt(shost, chlo, tgtlo, lun);
2157
2158         return 0;
2159 }
2160
2161 static int fc_tsk_mgmt_response(struct Scsi_Host *shost, u64 nexus, u64 tm_id,
2162                                 int result)
2163 {
2164         struct fc_internal *i = to_fc_internal(shost->transportt);
2165         return i->f->tsk_mgmt_response(shost, nexus, tm_id, result);
2166 }
2167
2168 static int fc_it_nexus_response(struct Scsi_Host *shost, u64 nexus, int result)
2169 {
2170         struct fc_internal *i = to_fc_internal(shost->transportt);
2171         return i->f->it_nexus_response(shost, nexus, result);
2172 }
2173
2174 struct scsi_transport_template *
2175 fc_attach_transport(struct fc_function_template *ft)
2176 {
2177         int count;
2178         struct fc_internal *i = kzalloc(sizeof(struct fc_internal),
2179                                         GFP_KERNEL);
2180
2181         if (unlikely(!i))
2182                 return NULL;
2183
2184         i->t.target_attrs.ac.attrs = &i->starget_attrs[0];
2185         i->t.target_attrs.ac.class = &fc_transport_class.class;
2186         i->t.target_attrs.ac.match = fc_target_match;
2187         i->t.target_size = sizeof(struct fc_starget_attrs);
2188         transport_container_register(&i->t.target_attrs);
2189
2190         i->t.host_attrs.ac.attrs = &i->host_attrs[0];
2191         i->t.host_attrs.ac.class = &fc_host_class.class;
2192         i->t.host_attrs.ac.match = fc_host_match;
2193         i->t.host_size = sizeof(struct fc_host_attrs);
2194         if (ft->get_fc_host_stats)
2195                 i->t.host_attrs.statistics = &fc_statistics_group;
2196         transport_container_register(&i->t.host_attrs);
2197
2198         i->rport_attr_cont.ac.attrs = &i->rport_attrs[0];
2199         i->rport_attr_cont.ac.class = &fc_rport_class.class;
2200         i->rport_attr_cont.ac.match = fc_rport_match;
2201         transport_container_register(&i->rport_attr_cont);
2202
2203         i->vport_attr_cont.ac.attrs = &i->vport_attrs[0];
2204         i->vport_attr_cont.ac.class = &fc_vport_class.class;
2205         i->vport_attr_cont.ac.match = fc_vport_match;
2206         transport_container_register(&i->vport_attr_cont);
2207
2208         i->f = ft;
2209
2210         /* Transport uses the shost workq for scsi scanning */
2211         i->t.create_work_queue = 1;
2212
2213         i->t.eh_timed_out = fc_timed_out;
2214
2215         i->t.user_scan = fc_user_scan;
2216
2217         /* target-mode drivers' functions */
2218         i->t.tsk_mgmt_response = fc_tsk_mgmt_response;
2219         i->t.it_nexus_response = fc_it_nexus_response;
2220
2221         /*
2222          * Setup SCSI Target Attributes.
2223          */
2224         count = 0;
2225         SETUP_STARGET_ATTRIBUTE_RD(node_name);
2226         SETUP_STARGET_ATTRIBUTE_RD(port_name);
2227         SETUP_STARGET_ATTRIBUTE_RD(port_id);
2228
2229         BUG_ON(count > FC_STARGET_NUM_ATTRS);
2230
2231         i->starget_attrs[count] = NULL;
2232
2233
2234         /*
2235          * Setup SCSI Host Attributes.
2236          */
2237         count=0;
2238         SETUP_HOST_ATTRIBUTE_RD(node_name);
2239         SETUP_HOST_ATTRIBUTE_RD(port_name);
2240         SETUP_HOST_ATTRIBUTE_RD(permanent_port_name);
2241         SETUP_HOST_ATTRIBUTE_RD(supported_classes);
2242         SETUP_HOST_ATTRIBUTE_RD(supported_fc4s);
2243         SETUP_HOST_ATTRIBUTE_RD(supported_speeds);
2244         SETUP_HOST_ATTRIBUTE_RD(maxframe_size);
2245         if (ft->vport_create) {
2246                 SETUP_HOST_ATTRIBUTE_RD_NS(max_npiv_vports);
2247                 SETUP_HOST_ATTRIBUTE_RD_NS(npiv_vports_inuse);
2248         }
2249         SETUP_HOST_ATTRIBUTE_RD(serial_number);
2250         SETUP_HOST_ATTRIBUTE_RD(manufacturer);
2251         SETUP_HOST_ATTRIBUTE_RD(model);
2252         SETUP_HOST_ATTRIBUTE_RD(model_description);
2253         SETUP_HOST_ATTRIBUTE_RD(hardware_version);
2254         SETUP_HOST_ATTRIBUTE_RD(driver_version);
2255         SETUP_HOST_ATTRIBUTE_RD(firmware_version);
2256         SETUP_HOST_ATTRIBUTE_RD(optionrom_version);
2257
2258         SETUP_HOST_ATTRIBUTE_RD(port_id);
2259         SETUP_HOST_ATTRIBUTE_RD(port_type);
2260         SETUP_HOST_ATTRIBUTE_RD(port_state);
2261         SETUP_HOST_ATTRIBUTE_RD(active_fc4s);
2262         SETUP_HOST_ATTRIBUTE_RD(speed);
2263         SETUP_HOST_ATTRIBUTE_RD(fabric_name);
2264         SETUP_HOST_ATTRIBUTE_RD(symbolic_name);
2265         SETUP_HOST_ATTRIBUTE_RW(system_hostname);
2266
2267         /* Transport-managed attributes */
2268         SETUP_PRIVATE_HOST_ATTRIBUTE_RW(dev_loss_tmo);
2269         SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type);
2270         if (ft->issue_fc_host_lip)
2271                 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(issue_lip);
2272         if (ft->vport_create)
2273                 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_create);
2274         if (ft->vport_delete)
2275                 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_delete);
2276
2277         BUG_ON(count > FC_HOST_NUM_ATTRS);
2278
2279         i->host_attrs[count] = NULL;
2280
2281         /*
2282          * Setup Remote Port Attributes.
2283          */
2284         count=0;
2285         SETUP_RPORT_ATTRIBUTE_RD(maxframe_size);
2286         SETUP_RPORT_ATTRIBUTE_RD(supported_classes);
2287         SETUP_RPORT_ATTRIBUTE_RW(dev_loss_tmo);
2288         SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(node_name);
2289         SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_name);
2290         SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_id);
2291         SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(roles);
2292         SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_state);
2293         SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(scsi_target_id);
2294         SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(fast_io_fail_tmo);
2295
2296         BUG_ON(count > FC_RPORT_NUM_ATTRS);
2297
2298         i->rport_attrs[count] = NULL;
2299
2300         /*
2301          * Setup Virtual Port Attributes.
2302          */
2303         count=0;
2304         SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_state);
2305         SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_last_state);
2306         SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(node_name);
2307         SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(port_name);
2308         SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(roles);
2309         SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_type);
2310         SETUP_VPORT_ATTRIBUTE_RW(symbolic_name);
2311         SETUP_VPORT_ATTRIBUTE_WR(vport_delete);
2312         SETUP_VPORT_ATTRIBUTE_WR(vport_disable);
2313
2314         BUG_ON(count > FC_VPORT_NUM_ATTRS);
2315
2316         i->vport_attrs[count] = NULL;
2317
2318         return &i->t;
2319 }
2320 EXPORT_SYMBOL(fc_attach_transport);
2321
2322 void fc_release_transport(struct scsi_transport_template *t)
2323 {
2324         struct fc_internal *i = to_fc_internal(t);
2325
2326         transport_container_unregister(&i->t.target_attrs);
2327         transport_container_unregister(&i->t.host_attrs);
2328         transport_container_unregister(&i->rport_attr_cont);
2329         transport_container_unregister(&i->vport_attr_cont);
2330
2331         kfree(i);
2332 }
2333 EXPORT_SYMBOL(fc_release_transport);
2334
2335 /**
2336  * fc_queue_work - Queue work to the fc_host workqueue.
2337  * @shost:      Pointer to Scsi_Host bound to fc_host.
2338  * @work:       Work to queue for execution.
2339  *
2340  * Return value:
2341  *      1 - work queued for execution
2342  *      0 - work is already queued
2343  *      -EINVAL - work queue doesn't exist
2344  */
2345 static int
2346 fc_queue_work(struct Scsi_Host *shost, struct work_struct *work)
2347 {
2348         if (unlikely(!fc_host_work_q(shost))) {
2349                 printk(KERN_ERR
2350                         "ERROR: FC host '%s' attempted to queue work, "
2351                         "when no workqueue created.\n", shost->hostt->name);
2352                 dump_stack();
2353
2354                 return -EINVAL;
2355         }
2356
2357         return queue_work(fc_host_work_q(shost), work);
2358 }
2359
2360 /**
2361  * fc_flush_work - Flush a fc_host's workqueue.
2362  * @shost:      Pointer to Scsi_Host bound to fc_host.
2363  */
2364 static void
2365 fc_flush_work(struct Scsi_Host *shost)
2366 {
2367         if (!fc_host_work_q(shost)) {
2368                 printk(KERN_ERR
2369                         "ERROR: FC host '%s' attempted to flush work, "
2370                         "when no workqueue created.\n", shost->hostt->name);
2371                 dump_stack();
2372                 return;
2373         }
2374
2375         flush_workqueue(fc_host_work_q(shost));
2376 }
2377
2378 /**
2379  * fc_queue_devloss_work - Schedule work for the fc_host devloss workqueue.
2380  * @shost:      Pointer to Scsi_Host bound to fc_host.
2381  * @work:       Work to queue for execution.
2382  * @delay:      jiffies to delay the work queuing
2383  *
2384  * Return value:
2385  *      1 on success / 0 already queued / < 0 for error
2386  */
2387 static int
2388 fc_queue_devloss_work(struct Scsi_Host *shost, struct delayed_work *work,
2389                                 unsigned long delay)
2390 {
2391         if (unlikely(!fc_host_devloss_work_q(shost))) {
2392                 printk(KERN_ERR
2393                         "ERROR: FC host '%s' attempted to queue work, "
2394                         "when no workqueue created.\n", shost->hostt->name);
2395                 dump_stack();
2396
2397                 return -EINVAL;
2398         }
2399
2400         return queue_delayed_work(fc_host_devloss_work_q(shost), work, delay);
2401 }
2402
2403 /**
2404  * fc_flush_devloss - Flush a fc_host's devloss workqueue.
2405  * @shost:      Pointer to Scsi_Host bound to fc_host.
2406  */
2407 static void
2408 fc_flush_devloss(struct Scsi_Host *shost)
2409 {
2410         if (!fc_host_devloss_work_q(shost)) {
2411                 printk(KERN_ERR
2412                         "ERROR: FC host '%s' attempted to flush work, "
2413                         "when no workqueue created.\n", shost->hostt->name);
2414                 dump_stack();
2415                 return;
2416         }
2417
2418         flush_workqueue(fc_host_devloss_work_q(shost));
2419 }
2420
2421
2422 /**
2423  * fc_remove_host - called to terminate any fc_transport-related elements for a scsi host.
2424  * @shost:      Which &Scsi_Host
2425  *
2426  * This routine is expected to be called immediately preceding the
2427  * a driver's call to scsi_remove_host().
2428  *
2429  * WARNING: A driver utilizing the fc_transport, which fails to call
2430  *   this routine prior to scsi_remove_host(), will leave dangling
2431  *   objects in /sys/class/fc_remote_ports. Access to any of these
2432  *   objects can result in a system crash !!!
2433  *
2434  * Notes:
2435  *      This routine assumes no locks are held on entry.
2436  */
2437 void
2438 fc_remove_host(struct Scsi_Host *shost)
2439 {
2440         struct fc_vport *vport = NULL, *next_vport = NULL;
2441         struct fc_rport *rport = NULL, *next_rport = NULL;
2442         struct workqueue_struct *work_q;
2443         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
2444         unsigned long flags;
2445
2446         spin_lock_irqsave(shost->host_lock, flags);
2447
2448         /* Remove any vports */
2449         list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers)
2450                 fc_queue_work(shost, &vport->vport_delete_work);
2451
2452         /* Remove any remote ports */
2453         list_for_each_entry_safe(rport, next_rport,
2454                         &fc_host->rports, peers) {
2455                 list_del(&rport->peers);
2456                 rport->port_state = FC_PORTSTATE_DELETED;
2457                 fc_queue_work(shost, &rport->rport_delete_work);
2458         }
2459
2460         list_for_each_entry_safe(rport, next_rport,
2461                         &fc_host->rport_bindings, peers) {
2462                 list_del(&rport->peers);
2463                 rport->port_state = FC_PORTSTATE_DELETED;
2464                 fc_queue_work(shost, &rport->rport_delete_work);
2465         }
2466
2467         spin_unlock_irqrestore(shost->host_lock, flags);
2468
2469         /* flush all scan work items */
2470         scsi_flush_work(shost);
2471
2472         /* flush all stgt delete, and rport delete work items, then kill it  */
2473         if (fc_host->work_q) {
2474                 work_q = fc_host->work_q;
2475                 fc_host->work_q = NULL;
2476                 destroy_workqueue(work_q);
2477         }
2478
2479         /* flush all devloss work items, then kill it  */
2480         if (fc_host->devloss_work_q) {
2481                 work_q = fc_host->devloss_work_q;
2482                 fc_host->devloss_work_q = NULL;
2483                 destroy_workqueue(work_q);
2484         }
2485 }
2486 EXPORT_SYMBOL(fc_remove_host);
2487
2488 static void fc_terminate_rport_io(struct fc_rport *rport)
2489 {
2490         struct Scsi_Host *shost = rport_to_shost(rport);
2491         struct fc_internal *i = to_fc_internal(shost->transportt);
2492
2493         /* Involve the LLDD if possible to terminate all io on the rport. */
2494         if (i->f->terminate_rport_io)
2495                 i->f->terminate_rport_io(rport);
2496
2497         /*
2498          * Must unblock to flush queued IO. scsi-ml will fail incoming reqs.
2499          */
2500         scsi_target_unblock(&rport->dev, SDEV_TRANSPORT_OFFLINE);
2501 }
2502
2503 /**
2504  * fc_starget_delete - called to delete the scsi descendants of an rport
2505  * @work:       remote port to be operated on.
2506  *
2507  * Deletes target and all sdevs.
2508  */
2509 static void
2510 fc_starget_delete(struct work_struct *work)
2511 {
2512         struct fc_rport *rport =
2513                 container_of(work, struct fc_rport, stgt_delete_work);
2514
2515         fc_terminate_rport_io(rport);
2516         scsi_remove_target(&rport->dev);
2517 }
2518
2519
2520 /**
2521  * fc_rport_final_delete - finish rport termination and delete it.
2522  * @work:       remote port to be deleted.
2523  */
2524 static void
2525 fc_rport_final_delete(struct work_struct *work)
2526 {
2527         struct fc_rport *rport =
2528                 container_of(work, struct fc_rport, rport_delete_work);
2529         struct device *dev = &rport->dev;
2530         struct Scsi_Host *shost = rport_to_shost(rport);
2531         struct fc_internal *i = to_fc_internal(shost->transportt);
2532         unsigned long flags;
2533         int do_callback = 0;
2534
2535         fc_terminate_rport_io(rport);
2536
2537         /*
2538          * if a scan is pending, flush the SCSI Host work_q so that
2539          * that we can reclaim the rport scan work element.
2540          */
2541         if (rport->flags & FC_RPORT_SCAN_PENDING)
2542                 scsi_flush_work(shost);
2543
2544         /*
2545          * Cancel any outstanding timers. These should really exist
2546          * only when rmmod'ing the LLDD and we're asking for
2547          * immediate termination of the rports
2548          */
2549         spin_lock_irqsave(shost->host_lock, flags);
2550         if (rport->flags & FC_RPORT_DEVLOSS_PENDING) {
2551                 spin_unlock_irqrestore(shost->host_lock, flags);
2552                 if (!cancel_delayed_work(&rport->fail_io_work))
2553                         fc_flush_devloss(shost);
2554                 if (!cancel_delayed_work(&rport->dev_loss_work))
2555                         fc_flush_devloss(shost);
2556                 spin_lock_irqsave(shost->host_lock, flags);
2557                 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
2558         }
2559         spin_unlock_irqrestore(shost->host_lock, flags);
2560
2561         /* Delete SCSI target and sdevs */
2562         if (rport->scsi_target_id != -1)
2563                 fc_starget_delete(&rport->stgt_delete_work);
2564
2565         /*
2566          * Notify the driver that the rport is now dead. The LLDD will
2567          * also guarantee that any communication to the rport is terminated
2568          *
2569          * Avoid this call if we already called it when we preserved the
2570          * rport for the binding.
2571          */
2572         spin_lock_irqsave(shost->host_lock, flags);
2573         if (!(rport->flags & FC_RPORT_DEVLOSS_CALLBK_DONE) &&
2574             (i->f->dev_loss_tmo_callbk)) {
2575                 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE;
2576                 do_callback = 1;
2577         }
2578         spin_unlock_irqrestore(shost->host_lock, flags);
2579
2580         if (do_callback)
2581                 i->f->dev_loss_tmo_callbk(rport);
2582
2583         fc_bsg_remove(rport->rqst_q);
2584
2585         transport_remove_device(dev);
2586         device_del(dev);
2587         transport_destroy_device(dev);
2588         put_device(&shost->shost_gendev);       /* for fc_host->rport list */
2589         put_device(dev);                        /* for self-reference */
2590 }
2591
2592
2593 /**
2594  * fc_rport_create - allocates and creates a remote FC port.
2595  * @shost:      scsi host the remote port is connected to.
2596  * @channel:    Channel on shost port connected to.
2597  * @ids:        The world wide names, fc address, and FC4 port
2598  *              roles for the remote port.
2599  *
2600  * Allocates and creates the remoter port structure, including the
2601  * class and sysfs creation.
2602  *
2603  * Notes:
2604  *      This routine assumes no locks are held on entry.
2605  */
2606 static struct fc_rport *
2607 fc_rport_create(struct Scsi_Host *shost, int channel,
2608         struct fc_rport_identifiers  *ids)
2609 {
2610         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
2611         struct fc_internal *fci = to_fc_internal(shost->transportt);
2612         struct fc_rport *rport;
2613         struct device *dev;
2614         unsigned long flags;
2615         int error;
2616         size_t size;
2617
2618         size = (sizeof(struct fc_rport) + fci->f->dd_fcrport_size);
2619         rport = kzalloc(size, GFP_KERNEL);
2620         if (unlikely(!rport)) {
2621                 printk(KERN_ERR "%s: allocation failure\n", __func__);
2622                 return NULL;
2623         }
2624
2625         rport->maxframe_size = -1;
2626         rport->supported_classes = FC_COS_UNSPECIFIED;
2627         rport->dev_loss_tmo = fc_host->dev_loss_tmo;
2628         memcpy(&rport->node_name, &ids->node_name, sizeof(rport->node_name));
2629         memcpy(&rport->port_name, &ids->port_name, sizeof(rport->port_name));
2630         rport->port_id = ids->port_id;
2631         rport->roles = ids->roles;
2632         rport->port_state = FC_PORTSTATE_ONLINE;
2633         if (fci->f->dd_fcrport_size)
2634                 rport->dd_data = &rport[1];
2635         rport->channel = channel;
2636         rport->fast_io_fail_tmo = -1;
2637
2638         INIT_DELAYED_WORK(&rport->dev_loss_work, fc_timeout_deleted_rport);
2639         INIT_DELAYED_WORK(&rport->fail_io_work, fc_timeout_fail_rport_io);
2640         INIT_WORK(&rport->scan_work, fc_scsi_scan_rport);
2641         INIT_WORK(&rport->stgt_delete_work, fc_starget_delete);
2642         INIT_WORK(&rport->rport_delete_work, fc_rport_final_delete);
2643
2644         spin_lock_irqsave(shost->host_lock, flags);
2645
2646         rport->number = fc_host->next_rport_number++;
2647         if (rport->roles & FC_PORT_ROLE_FCP_TARGET)
2648                 rport->scsi_target_id = fc_host->next_target_id++;
2649         else
2650                 rport->scsi_target_id = -1;
2651         list_add_tail(&rport->peers, &fc_host->rports);
2652         get_device(&shost->shost_gendev);       /* for fc_host->rport list */
2653
2654         spin_unlock_irqrestore(shost->host_lock, flags);
2655
2656         dev = &rport->dev;
2657         device_initialize(dev);                 /* takes self reference */
2658         dev->parent = get_device(&shost->shost_gendev); /* parent reference */
2659         dev->release = fc_rport_dev_release;
2660         dev_set_name(dev, "rport-%d:%d-%d",
2661                      shost->host_no, channel, rport->number);
2662         transport_setup_device(dev);
2663
2664         error = device_add(dev);
2665         if (error) {
2666                 printk(KERN_ERR "FC Remote Port device_add failed\n");
2667                 goto delete_rport;
2668         }
2669         transport_add_device(dev);
2670         transport_configure_device(dev);
2671
2672         fc_bsg_rportadd(shost, rport);
2673         /* ignore any bsg add error - we just can't do sgio */
2674
2675         if (rport->roles & FC_PORT_ROLE_FCP_TARGET) {
2676                 /* initiate a scan of the target */
2677                 rport->flags |= FC_RPORT_SCAN_PENDING;
2678                 scsi_queue_work(shost, &rport->scan_work);
2679         }
2680
2681         return rport;
2682
2683 delete_rport:
2684         transport_destroy_device(dev);
2685         spin_lock_irqsave(shost->host_lock, flags);
2686         list_del(&rport->peers);
2687         put_device(&shost->shost_gendev);       /* for fc_host->rport list */
2688         spin_unlock_irqrestore(shost->host_lock, flags);
2689         put_device(dev->parent);
2690         kfree(rport);
2691         return NULL;
2692 }
2693
2694 /**
2695  * fc_remote_port_add - notify fc transport of the existence of a remote FC port.
2696  * @shost:      scsi host the remote port is connected to.
2697  * @channel:    Channel on shost port connected to.
2698  * @ids:        The world wide names, fc address, and FC4 port
2699  *              roles for the remote port.
2700  *
2701  * The LLDD calls this routine to notify the transport of the existence
2702  * of a remote port. The LLDD provides the unique identifiers (wwpn,wwn)
2703  * of the port, it's FC address (port_id), and the FC4 roles that are
2704  * active for the port.
2705  *
2706  * For ports that are FCP targets (aka scsi targets), the FC transport
2707  * maintains consistent target id bindings on behalf of the LLDD.
2708  * A consistent target id binding is an assignment of a target id to
2709  * a remote port identifier, which persists while the scsi host is
2710  * attached. The remote port can disappear, then later reappear, and
2711  * it's target id assignment remains the same. This allows for shifts
2712  * in FC addressing (if binding by wwpn or wwnn) with no apparent
2713  * changes to the scsi subsystem which is based on scsi host number and
2714  * target id values.  Bindings are only valid during the attachment of
2715  * the scsi host. If the host detaches, then later re-attaches, target
2716  * id bindings may change.
2717  *
2718  * This routine is responsible for returning a remote port structure.
2719  * The routine will search the list of remote ports it maintains
2720  * internally on behalf of consistent target id mappings. If found, the
2721  * remote port structure will be reused. Otherwise, a new remote port
2722  * structure will be allocated.
2723  *
2724  * Whenever a remote port is allocated, a new fc_remote_port class
2725  * device is created.
2726  *
2727  * Should not be called from interrupt context.
2728  *
2729  * Notes:
2730  *      This routine assumes no locks are held on entry.
2731  */
2732 struct fc_rport *
2733 fc_remote_port_add(struct Scsi_Host *shost, int channel,
2734         struct fc_rport_identifiers  *ids)
2735 {
2736         struct fc_internal *fci = to_fc_internal(shost->transportt);
2737         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
2738         struct fc_rport *rport;
2739         unsigned long flags;
2740         int match = 0;
2741
2742         /* ensure any stgt delete functions are done */
2743         fc_flush_work(shost);
2744
2745         /*
2746          * Search the list of "active" rports, for an rport that has been
2747          * deleted, but we've held off the real delete while the target
2748          * is in a "blocked" state.
2749          */
2750         spin_lock_irqsave(shost->host_lock, flags);
2751
2752         list_for_each_entry(rport, &fc_host->rports, peers) {
2753
2754                 if ((rport->port_state == FC_PORTSTATE_BLOCKED) &&
2755                         (rport->channel == channel)) {
2756
2757                         switch (fc_host->tgtid_bind_type) {
2758                         case FC_TGTID_BIND_BY_WWPN:
2759                         case FC_TGTID_BIND_NONE:
2760                                 if (rport->port_name == ids->port_name)
2761                                         match = 1;
2762                                 break;
2763                         case FC_TGTID_BIND_BY_WWNN:
2764                                 if (rport->node_name == ids->node_name)
2765                                         match = 1;
2766                                 break;
2767                         case FC_TGTID_BIND_BY_ID:
2768                                 if (rport->port_id == ids->port_id)
2769                                         match = 1;
2770                                 break;
2771                         }
2772
2773                         if (match) {
2774
2775                                 memcpy(&rport->node_name, &ids->node_name,
2776                                         sizeof(rport->node_name));
2777                                 memcpy(&rport->port_name, &ids->port_name,
2778                                         sizeof(rport->port_name));
2779                                 rport->port_id = ids->port_id;
2780
2781                                 rport->port_state = FC_PORTSTATE_ONLINE;
2782                                 rport->roles = ids->roles;
2783
2784                                 spin_unlock_irqrestore(shost->host_lock, flags);
2785
2786                                 if (fci->f->dd_fcrport_size)
2787                                         memset(rport->dd_data, 0,
2788                                                 fci->f->dd_fcrport_size);
2789
2790                                 /*
2791                                  * If we were not a target, cancel the
2792                                  * io terminate and rport timers, and
2793                                  * we're done.
2794                                  *
2795                                  * If we were a target, but our new role
2796                                  * doesn't indicate a target, leave the
2797                                  * timers running expecting the role to
2798                                  * change as the target fully logs in. If
2799                                  * it doesn't, the target will be torn down.
2800                                  *
2801                                  * If we were a target, and our role shows
2802                                  * we're still a target, cancel the timers
2803                                  * and kick off a scan.
2804                                  */
2805
2806                                 /* was a target, not in roles */
2807                                 if ((rport->scsi_target_id != -1) &&
2808                                     (!(ids->roles & FC_PORT_ROLE_FCP_TARGET)))
2809                                         return rport;
2810
2811                                 /*
2812                                  * Stop the fail io and dev_loss timers.
2813                                  * If they flush, the port_state will
2814                                  * be checked and will NOOP the function.
2815                                  */
2816                                 if (!cancel_delayed_work(&rport->fail_io_work))
2817                                         fc_flush_devloss(shost);
2818                                 if (!cancel_delayed_work(&rport->dev_loss_work))
2819                                         fc_flush_devloss(shost);
2820
2821                                 spin_lock_irqsave(shost->host_lock, flags);
2822
2823                                 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT |
2824                                                   FC_RPORT_DEVLOSS_PENDING |
2825                                                   FC_RPORT_DEVLOSS_CALLBK_DONE);
2826
2827                                 spin_unlock_irqrestore(shost->host_lock, flags);
2828
2829                                 /* if target, initiate a scan */
2830                                 if (rport->scsi_target_id != -1) {
2831                                         scsi_target_unblock(&rport->dev,
2832                                                             SDEV_RUNNING);
2833                                         spin_lock_irqsave(shost->host_lock,
2834                                                           flags);
2835                                         rport->flags |= FC_RPORT_SCAN_PENDING;
2836                                         scsi_queue_work(shost,
2837                                                         &rport->scan_work);
2838                                         spin_unlock_irqrestore(shost->host_lock,
2839                                                         flags);
2840                                 }
2841
2842                                 fc_bsg_goose_queue(rport);
2843
2844                                 return rport;
2845                         }
2846                 }
2847         }
2848
2849         /*
2850          * Search the bindings array
2851          * Note: if never a FCP target, you won't be on this list
2852          */
2853         if (fc_host->tgtid_bind_type != FC_TGTID_BIND_NONE) {
2854
2855                 /* search for a matching consistent binding */
2856
2857                 list_for_each_entry(rport, &fc_host->rport_bindings,
2858                                         peers) {
2859                         if (rport->channel != channel)
2860                                 continue;
2861
2862                         switch (fc_host->tgtid_bind_type) {
2863                         case FC_TGTID_BIND_BY_WWPN:
2864                                 if (rport->port_name == ids->port_name)
2865                                         match = 1;
2866                                 break;
2867                         case FC_TGTID_BIND_BY_WWNN:
2868                                 if (rport->node_name == ids->node_name)
2869                                         match = 1;
2870                                 break;
2871                         case FC_TGTID_BIND_BY_ID:
2872                                 if (rport->port_id == ids->port_id)
2873                                         match = 1;
2874                                 break;
2875                         case FC_TGTID_BIND_NONE: /* to keep compiler happy */
2876                                 break;
2877                         }
2878
2879                         if (match) {
2880                                 list_move_tail(&rport->peers, &fc_host->rports);
2881                                 break;
2882                         }
2883                 }
2884
2885                 if (match) {
2886                         memcpy(&rport->node_name, &ids->node_name,
2887                                 sizeof(rport->node_name));
2888                         memcpy(&rport->port_name, &ids->port_name,
2889                                 sizeof(rport->port_name));
2890                         rport->port_id = ids->port_id;
2891                         rport->roles = ids->roles;
2892                         rport->port_state = FC_PORTSTATE_ONLINE;
2893                         rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT;
2894
2895                         if (fci->f->dd_fcrport_size)
2896                                 memset(rport->dd_data, 0,
2897                                                 fci->f->dd_fcrport_size);
2898                         spin_unlock_irqrestore(shost->host_lock, flags);
2899
2900                         if (ids->roles & FC_PORT_ROLE_FCP_TARGET) {
2901                                 scsi_target_unblock(&rport->dev, SDEV_RUNNING);
2902
2903                                 /* initiate a scan of the target */
2904                                 spin_lock_irqsave(shost->host_lock, flags);
2905                                 rport->flags |= FC_RPORT_SCAN_PENDING;
2906                                 scsi_queue_work(shost, &rport->scan_work);
2907                                 spin_unlock_irqrestore(shost->host_lock, flags);
2908                         }
2909                         return rport;
2910                 }
2911         }
2912
2913         spin_unlock_irqrestore(shost->host_lock, flags);
2914
2915         /* No consistent binding found - create new remote port entry */
2916         rport = fc_rport_create(shost, channel, ids);
2917
2918         return rport;
2919 }
2920 EXPORT_SYMBOL(fc_remote_port_add);
2921
2922
2923 /**
2924  * fc_remote_port_delete - notifies the fc transport that a remote port is no longer in existence.
2925  * @rport:      The remote port that no longer exists
2926  *
2927  * The LLDD calls this routine to notify the transport that a remote
2928  * port is no longer part of the topology. Note: Although a port
2929  * may no longer be part of the topology, it may persist in the remote
2930  * ports displayed by the fc_host. We do this under 2 conditions:
2931  * 1) If the port was a scsi target, we delay its deletion by "blocking" it.
2932  *   This allows the port to temporarily disappear, then reappear without
2933  *   disrupting the SCSI device tree attached to it. During the "blocked"
2934  *   period the port will still exist.
2935  * 2) If the port was a scsi target and disappears for longer than we
2936  *   expect, we'll delete the port and the tear down the SCSI device tree
2937  *   attached to it. However, we want to semi-persist the target id assigned
2938  *   to that port if it eventually does exist. The port structure will
2939  *   remain (although with minimal information) so that the target id
2940  *   bindings remails.
2941  *
2942  * If the remote port is not an FCP Target, it will be fully torn down
2943  * and deallocated, including the fc_remote_port class device.
2944  *
2945  * If the remote port is an FCP Target, the port will be placed in a
2946  * temporary blocked state. From the LLDD's perspective, the rport no
2947  * longer exists. From the SCSI midlayer's perspective, the SCSI target
2948  * exists, but all sdevs on it are blocked from further I/O. The following
2949  * is then expected.
2950  *
2951  *   If the remote port does not return (signaled by a LLDD call to
2952  *   fc_remote_port_add()) within the dev_loss_tmo timeout, then the
2953  *   scsi target is removed - killing all outstanding i/o and removing the
2954  *   scsi devices attached ot it. The port structure will be marked Not
2955  *   Present and be partially cleared, leaving only enough information to
2956  *   recognize the remote port relative to the scsi target id binding if
2957  *   it later appears.  The port will remain as long as there is a valid
2958  *   binding (e.g. until the user changes the binding type or unloads the
2959  *   scsi host with the binding).
2960  *
2961  *   If the remote port returns within the dev_loss_tmo value (and matches
2962  *   according to the target id binding type), the port structure will be
2963  *   reused. If it is no longer a SCSI target, the target will be torn
2964  *   down. If it continues to be a SCSI target, then the target will be
2965  *   unblocked (allowing i/o to be resumed), and a scan will be activated
2966  *   to ensure that all luns are detected.
2967  *
2968  * Called from normal process context only - cannot be called from interrupt.
2969  *
2970  * Notes:
2971  *      This routine assumes no locks are held on entry.
2972  */
2973 void
2974 fc_remote_port_delete(struct fc_rport  *rport)
2975 {
2976         struct Scsi_Host *shost = rport_to_shost(rport);
2977         unsigned long timeout = rport->dev_loss_tmo;
2978         unsigned long flags;
2979
2980         /*
2981          * No need to flush the fc_host work_q's, as all adds are synchronous.
2982          *
2983          * We do need to reclaim the rport scan work element, so eventually
2984          * (in fc_rport_final_delete()) we'll flush the scsi host work_q if
2985          * there's still a scan pending.
2986          */
2987
2988         spin_lock_irqsave(shost->host_lock, flags);
2989
2990         if (rport->port_state != FC_PORTSTATE_ONLINE) {
2991                 spin_unlock_irqrestore(shost->host_lock, flags);
2992                 return;
2993         }
2994
2995         /*
2996          * In the past, we if this was not an FCP-Target, we would
2997          * unconditionally just jump to deleting the rport.
2998          * However, rports can be used as node containers by the LLDD,
2999          * and its not appropriate to just terminate the rport at the
3000          * first sign of a loss in connectivity. The LLDD may want to
3001          * send ELS traffic to re-validate the login. If the rport is
3002          * immediately deleted, it makes it inappropriate for a node
3003          * container.
3004          * So... we now unconditionally wait dev_loss_tmo before
3005          * destroying an rport.
3006          */
3007
3008         rport->port_state = FC_PORTSTATE_BLOCKED;
3009
3010         rport->flags |= FC_RPORT_DEVLOSS_PENDING;
3011
3012         spin_unlock_irqrestore(shost->host_lock, flags);
3013
3014         if (rport->roles & FC_PORT_ROLE_FCP_INITIATOR &&
3015             shost->active_mode & MODE_TARGET)
3016                 fc_tgt_it_nexus_destroy(shost, (unsigned long)rport);
3017
3018         scsi_target_block(&rport->dev);
3019
3020         /* see if we need to kill io faster than waiting for device loss */
3021         if ((rport->fast_io_fail_tmo != -1) &&
3022             (rport->fast_io_fail_tmo < timeout))
3023                 fc_queue_devloss_work(shost, &rport->fail_io_work,
3024                                         rport->fast_io_fail_tmo * HZ);
3025
3026         /* cap the length the devices can be blocked until they are deleted */
3027         fc_queue_devloss_work(shost, &rport->dev_loss_work, timeout * HZ);
3028 }
3029 EXPORT_SYMBOL(fc_remote_port_delete);
3030
3031 /**
3032  * fc_remote_port_rolechg - notifies the fc transport that the roles on a remote may have changed.
3033  * @rport:      The remote port that changed.
3034  * @roles:      New roles for this port.
3035  *
3036  * Description: The LLDD calls this routine to notify the transport that the
3037  * roles on a remote port may have changed. The largest effect of this is
3038  * if a port now becomes a FCP Target, it must be allocated a
3039  * scsi target id.  If the port is no longer a FCP target, any
3040  * scsi target id value assigned to it will persist in case the
3041  * role changes back to include FCP Target. No changes in the scsi
3042  * midlayer will be invoked if the role changes (in the expectation
3043  * that the role will be resumed. If it doesn't normal error processing
3044  * will take place).
3045  *
3046  * Should not be called from interrupt context.
3047  *
3048  * Notes:
3049  *      This routine assumes no locks are held on entry.
3050  */
3051 void
3052 fc_remote_port_rolechg(struct fc_rport  *rport, u32 roles)
3053 {
3054         struct Scsi_Host *shost = rport_to_shost(rport);
3055         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3056         unsigned long flags;
3057         int create = 0;
3058         int ret;
3059
3060         spin_lock_irqsave(shost->host_lock, flags);
3061         if (roles & FC_PORT_ROLE_FCP_TARGET) {
3062                 if (rport->scsi_target_id == -1) {
3063                         rport->scsi_target_id = fc_host->next_target_id++;
3064                         create = 1;
3065                 } else if (!(rport->roles & FC_PORT_ROLE_FCP_TARGET))
3066                         create = 1;
3067         } else if (shost->active_mode & MODE_TARGET) {
3068                 ret = fc_tgt_it_nexus_create(shost, (unsigned long)rport,
3069                                              (char *)&rport->node_name);
3070                 if (ret)
3071                         printk(KERN_ERR "FC Remore Port tgt nexus failed %d\n",
3072                                ret);
3073         }
3074
3075         rport->roles = roles;
3076
3077         spin_unlock_irqrestore(shost->host_lock, flags);
3078
3079         if (create) {
3080                &nb