#include <scsi/scsi_host.h>
#include <scsi/scsi_transport.h>
#include <scsi/scsi_transport_fc.h>
+#include <scsi/scsi_cmnd.h>
+#include <linux/netlink.h>
+#include <net/netlink.h>
+#include <scsi/scsi_netlink_fc.h>
#include "scsi_priv.h"
+static int fc_queue_work(struct Scsi_Host *, struct work_struct *);
+
/*
* Redefine so that we can have same named attributes in the
* sdev/starget/host objects.
int i; \
char *name = NULL; \
\
- for (i = 0; i < sizeof(table)/sizeof(table[0]); i++) { \
+ for (i = 0; i < ARRAY_SIZE(table); i++) { \
if (table[i].value == table_key) { \
name = table[i].name; \
break; \
{ \
int i; \
\
- for (i = 0; i < sizeof(table)/sizeof(table[0]); i++) { \
+ for (i = 0; i < ARRAY_SIZE(table); i++) { \
if (strncmp(table_key, table[i].name, \
table[i].matchlen) == 0) { \
*value = table[i].value; \
#define FC_PORTTYPE_MAX_NAMELEN 50
+/* Convert fc_host_event_code values to ascii string name */
+static const struct {
+ enum fc_host_event_code value;
+ char *name;
+} fc_host_event_code_names[] = {
+ { FCH_EVT_LIP, "lip" },
+ { FCH_EVT_LINKUP, "link_up" },
+ { FCH_EVT_LINKDOWN, "link_down" },
+ { FCH_EVT_LIPRESET, "lip_reset" },
+ { FCH_EVT_RSCN, "rscn" },
+ { FCH_EVT_ADAPTER_CHANGE, "adapter_chg" },
+ { FCH_EVT_PORT_UNKNOWN, "port_unknown" },
+ { FCH_EVT_PORT_ONLINE, "port_online" },
+ { FCH_EVT_PORT_OFFLINE, "port_offline" },
+ { FCH_EVT_PORT_FABRIC, "port_fabric" },
+ { FCH_EVT_LINK_UNKNOWN, "link_unknown" },
+ { FCH_EVT_VENDOR_UNIQUE, "vendor_unique" },
+};
+fc_enum_name_search(host_event_code, fc_host_event_code,
+ fc_host_event_code_names)
+#define FC_HOST_EVENT_CODE_MAX_NAMELEN 30
+
+
/* Convert fc_port_state values to ascii string name */
static struct {
enum fc_port_state value;
ssize_t len = 0; \
int i; \
\
- for (i = 0; i < sizeof(table)/sizeof(table[0]); i++) { \
+ for (i = 0; i < ARRAY_SIZE(table); i++) { \
if (table[i].value & table_key) { \
len += sprintf(buf + len, "%s%s", \
prefix, table[i].name); \
#define FC_MGMTSRVR_PORTID 0x00000a
-static void fc_shost_remove_rports(void *data);
-static void fc_timeout_deleted_rport(void *data);
-static void fc_scsi_scan_rport(void *data);
-static void fc_rport_terminate(struct fc_rport *rport);
+static void fc_timeout_deleted_rport(struct work_struct *work);
+static void fc_timeout_fail_rport_io(struct work_struct *work);
+static void fc_scsi_scan_rport(struct work_struct *work);
/*
* Attribute counts pre object type...
* Increase these values if you add attributes
*/
#define FC_STARGET_NUM_ATTRS 3
-#define FC_RPORT_NUM_ATTRS 9
+#define FC_RPORT_NUM_ATTRS 10
#define FC_HOST_NUM_ATTRS 17
struct fc_internal {
struct class_device *cdev)
{
struct Scsi_Host *shost = dev_to_shost(dev);
+ struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
/*
* Set default values easily detected by the midlayer as
* failure cases. The scsi lldd is responsible for initializing
* all transport attributes to valid values per host.
*/
- fc_host_node_name(shost) = -1;
- fc_host_port_name(shost) = -1;
- fc_host_permanent_port_name(shost) = -1;
- fc_host_supported_classes(shost) = FC_COS_UNSPECIFIED;
- memset(fc_host_supported_fc4s(shost), 0,
- sizeof(fc_host_supported_fc4s(shost)));
- memset(fc_host_symbolic_name(shost), 0,
- sizeof(fc_host_symbolic_name(shost)));
- fc_host_supported_speeds(shost) = FC_PORTSPEED_UNKNOWN;
- fc_host_maxframe_size(shost) = -1;
- memset(fc_host_serial_number(shost), 0,
- sizeof(fc_host_serial_number(shost)));
-
- fc_host_port_id(shost) = -1;
- fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN;
- fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN;
- memset(fc_host_active_fc4s(shost), 0,
- sizeof(fc_host_active_fc4s(shost)));
- fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
- fc_host_fabric_name(shost) = -1;
-
- fc_host_tgtid_bind_type(shost) = FC_TGTID_BIND_BY_WWPN;
-
- INIT_LIST_HEAD(&fc_host_rports(shost));
- INIT_LIST_HEAD(&fc_host_rport_bindings(shost));
- fc_host_next_rport_number(shost) = 0;
- fc_host_next_target_id(shost) = 0;
-
- fc_host_flags(shost) = 0;
- INIT_WORK(&fc_host_rport_del_work(shost), fc_shost_remove_rports, shost);
+ fc_host->node_name = -1;
+ fc_host->port_name = -1;
+ fc_host->permanent_port_name = -1;
+ fc_host->supported_classes = FC_COS_UNSPECIFIED;
+ memset(fc_host->supported_fc4s, 0,
+ sizeof(fc_host->supported_fc4s));
+ fc_host->supported_speeds = FC_PORTSPEED_UNKNOWN;
+ fc_host->maxframe_size = -1;
+ memset(fc_host->serial_number, 0,
+ sizeof(fc_host->serial_number));
+
+ fc_host->port_id = -1;
+ fc_host->port_type = FC_PORTTYPE_UNKNOWN;
+ fc_host->port_state = FC_PORTSTATE_UNKNOWN;
+ memset(fc_host->active_fc4s, 0,
+ sizeof(fc_host->active_fc4s));
+ fc_host->speed = FC_PORTSPEED_UNKNOWN;
+ fc_host->fabric_name = -1;
+ memset(fc_host->symbolic_name, 0, sizeof(fc_host->symbolic_name));
+ memset(fc_host->system_hostname, 0, sizeof(fc_host->system_hostname));
+
+ fc_host->tgtid_bind_type = FC_TGTID_BIND_BY_WWPN;
+
+ INIT_LIST_HEAD(&fc_host->rports);
+ INIT_LIST_HEAD(&fc_host->rport_bindings);
+ fc_host->next_rport_number = 0;
+ fc_host->next_target_id = 0;
+
+ snprintf(fc_host->work_q_name, KOBJ_NAME_LEN, "fc_wq_%d",
+ shost->host_no);
+ fc_host->work_q = create_singlethread_workqueue(
+ fc_host->work_q_name);
+ if (!fc_host->work_q)
+ return -ENOMEM;
+
+ snprintf(fc_host->devloss_work_q_name, KOBJ_NAME_LEN, "fc_dl_%d",
+ shost->host_no);
+ fc_host->devloss_work_q = create_singlethread_workqueue(
+ fc_host->devloss_work_q_name);
+ if (!fc_host->devloss_work_q) {
+ destroy_workqueue(fc_host->work_q);
+ fc_host->work_q = NULL;
+ return -ENOMEM;
+ }
+
return 0;
}
* should insulate the loss of a remote port.
* The maximum will be capped by the value of SCSI_DEVICE_BLOCK_MAX_TIMEOUT.
*/
-static unsigned int fc_dev_loss_tmo = SCSI_DEVICE_BLOCK_MAX_TIMEOUT;
+static unsigned int fc_dev_loss_tmo = 60; /* seconds */
module_param_named(dev_loss_tmo, fc_dev_loss_tmo, int, S_IRUGO|S_IWUSR);
MODULE_PARM_DESC(dev_loss_tmo,
" exceeded, the scsi target is removed. Value should be"
" between 1 and SCSI_DEVICE_BLOCK_MAX_TIMEOUT.");
+/**
+ * Netlink Infrastructure
+ **/
+
+static atomic_t fc_event_seq;
+
+/**
+ * fc_get_event_number - Obtain the next sequential FC event number
+ *
+ * Notes:
+ * We could have inline'd this, but it would have required fc_event_seq to
+ * be exposed. For now, live with the subroutine call.
+ * Atomic used to avoid lock/unlock...
+ **/
+u32
+fc_get_event_number(void)
+{
+ return atomic_add_return(1, &fc_event_seq);
+}
+EXPORT_SYMBOL(fc_get_event_number);
+
+
+/**
+ * fc_host_post_event - called to post an even on an fc_host.
+ *
+ * @shost: host the event occurred on
+ * @event_number: fc event number obtained from get_fc_event_number()
+ * @event_code: fc_host event being posted
+ * @event_data: 32bits of data for the event being posted
+ *
+ * Notes:
+ * This routine assumes no locks are held on entry.
+ **/
+void
+fc_host_post_event(struct Scsi_Host *shost, u32 event_number,
+ enum fc_host_event_code event_code, u32 event_data)
+{
+ struct sk_buff *skb;
+ struct nlmsghdr *nlh;
+ struct fc_nl_event *event;
+ const char *name;
+ u32 len, skblen;
+ int err;
+
+ if (!scsi_nl_sock) {
+ err = -ENOENT;
+ goto send_fail;
+ }
+
+ len = FC_NL_MSGALIGN(sizeof(*event));
+ skblen = NLMSG_SPACE(len);
+
+ skb = alloc_skb(skblen, GFP_KERNEL);
+ if (!skb) {
+ err = -ENOBUFS;
+ goto send_fail;
+ }
+
+ nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG,
+ skblen - sizeof(*nlh), 0);
+ if (!nlh) {
+ err = -ENOBUFS;
+ goto send_fail_skb;
+ }
+ event = NLMSG_DATA(nlh);
+
+ INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC,
+ FC_NL_ASYNC_EVENT, len);
+ event->seconds = get_seconds();
+ event->vendor_id = 0;
+ event->host_no = shost->host_no;
+ event->event_datalen = sizeof(u32); /* bytes */
+ event->event_num = event_number;
+ event->event_code = event_code;
+ event->event_data = event_data;
+
+ err = nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS,
+ GFP_KERNEL);
+ if (err && (err != -ESRCH)) /* filter no recipient errors */
+ /* nlmsg_multicast already kfree_skb'd */
+ goto send_fail;
+
+ return;
+
+send_fail_skb:
+ kfree_skb(skb);
+send_fail:
+ name = get_fc_host_event_code_name(event_code);
+ printk(KERN_WARNING
+ "%s: Dropped Event : host %d %s data 0x%08x - err %d\n",
+ __FUNCTION__, shost->host_no,
+ (name) ? name : "<unknown>", event_data, err);
+ return;
+}
+EXPORT_SYMBOL(fc_host_post_event);
+
+
+/**
+ * fc_host_post_vendor_event - called to post a vendor unique event on
+ * a fc_host
+ *
+ * @shost: host the event occurred on
+ * @event_number: fc event number obtained from get_fc_event_number()
+ * @data_len: amount, in bytes, of vendor unique data
+ * @data_buf: pointer to vendor unique data
+ *
+ * Notes:
+ * This routine assumes no locks are held on entry.
+ **/
+void
+fc_host_post_vendor_event(struct Scsi_Host *shost, u32 event_number,
+ u32 data_len, char * data_buf, u64 vendor_id)
+{
+ struct sk_buff *skb;
+ struct nlmsghdr *nlh;
+ struct fc_nl_event *event;
+ u32 len, skblen;
+ int err;
+
+ if (!scsi_nl_sock) {
+ err = -ENOENT;
+ goto send_vendor_fail;
+ }
+
+ len = FC_NL_MSGALIGN(sizeof(*event) + data_len);
+ skblen = NLMSG_SPACE(len);
+
+ skb = alloc_skb(skblen, GFP_KERNEL);
+ if (!skb) {
+ err = -ENOBUFS;
+ goto send_vendor_fail;
+ }
+
+ nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG,
+ skblen - sizeof(*nlh), 0);
+ if (!nlh) {
+ err = -ENOBUFS;
+ goto send_vendor_fail_skb;
+ }
+ event = NLMSG_DATA(nlh);
+
+ INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC,
+ FC_NL_ASYNC_EVENT, len);
+ event->seconds = get_seconds();
+ event->vendor_id = vendor_id;
+ event->host_no = shost->host_no;
+ event->event_datalen = data_len; /* bytes */
+ event->event_num = event_number;
+ event->event_code = FCH_EVT_VENDOR_UNIQUE;
+ memcpy(&event->event_data, data_buf, data_len);
+
+ err = nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS,
+ GFP_KERNEL);
+ if (err && (err != -ESRCH)) /* filter no recipient errors */
+ /* nlmsg_multicast already kfree_skb'd */
+ goto send_vendor_fail;
+
+ return;
+
+send_vendor_fail_skb:
+ kfree_skb(skb);
+send_vendor_fail:
+ printk(KERN_WARNING
+ "%s: Dropped Event : host %d vendor_unique - err %d\n",
+ __FUNCTION__, shost->host_no, err);
+ return;
+}
+EXPORT_SYMBOL(fc_host_post_vendor_event);
+
+
static __init int fc_transport_init(void)
{
- int error = transport_class_register(&fc_host_class);
+ int error;
+
+ atomic_set(&fc_event_seq, 0);
+
+ error = transport_class_register(&fc_host_class);
if (error)
return error;
error = transport_class_register(&fc_rport_class);
struct fc_rport *rport = transport_class_to_rport(cdev); \
struct Scsi_Host *shost = rport_to_shost(rport); \
struct fc_internal *i = to_fc_internal(shost->transportt); \
+ char *cp; \
if ((rport->port_state == FC_PORTSTATE_BLOCKED) || \
(rport->port_state == FC_PORTSTATE_DELETED) || \
(rport->port_state == FC_PORTSTATE_NOTPRESENT)) \
return -EBUSY; \
- val = simple_strtoul(buf, NULL, 0); \
+ val = simple_strtoul(buf, &cp, 0); \
+ if (*cp && (*cp != '\n')) \
+ return -EINVAL; \
i->f->set_rport_##field(rport, val); \
return count; \
}
if (i->f->show_rport_##field) \
count++
+#define SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(field) \
+{ \
+ i->private_rport_attrs[count] = class_device_attr_rport_##field; \
+ i->rport_attrs[count] = &i->private_rport_attrs[count]; \
+ count++; \
+}
+
/* The FC Transport Remote Port Attributes: */
struct fc_rport *rport = transport_class_to_rport(cdev);
struct Scsi_Host *shost = rport_to_shost(rport);
struct fc_internal *i = to_fc_internal(shost->transportt);
+ char *cp;
if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||
(rport->port_state == FC_PORTSTATE_DELETED) ||
(rport->port_state == FC_PORTSTATE_NOTPRESENT))
return -EBUSY;
- val = simple_strtoul(buf, NULL, 0);
- if ((val < 0) || (val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT))
+ val = simple_strtoul(buf, &cp, 0);
+ if ((*cp && (*cp != '\n')) ||
+ (val < 0) || (val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT))
return -EINVAL;
i->f->set_rport_dev_loss_tmo(rport, val);
return count;
fc_private_rport_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN);
fc_private_rport_rd_attr(scsi_target_id, "%d\n", 20);
+/*
+ * fast_io_fail_tmo attribute
+ */
+static ssize_t
+show_fc_rport_fast_io_fail_tmo (struct class_device *cdev, char *buf)
+{
+ struct fc_rport *rport = transport_class_to_rport(cdev);
+
+ if (rport->fast_io_fail_tmo == -1)
+ return snprintf(buf, 5, "off\n");
+ return snprintf(buf, 20, "%d\n", rport->fast_io_fail_tmo);
+}
+
+static ssize_t
+store_fc_rport_fast_io_fail_tmo(struct class_device *cdev, const char *buf,
+ size_t count)
+{
+ int val;
+ char *cp;
+ struct fc_rport *rport = transport_class_to_rport(cdev);
+
+ if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||
+ (rport->port_state == FC_PORTSTATE_DELETED) ||
+ (rport->port_state == FC_PORTSTATE_NOTPRESENT))
+ return -EBUSY;
+ if (strncmp(buf, "off", 3) == 0)
+ rport->fast_io_fail_tmo = -1;
+ else {
+ val = simple_strtoul(buf, &cp, 0);
+ if ((*cp && (*cp != '\n')) ||
+ (val < 0) || (val >= rport->dev_loss_tmo))
+ return -EINVAL;
+ rport->fast_io_fail_tmo = val;
+ }
+ return count;
+}
+static FC_CLASS_DEVICE_ATTR(rport, fast_io_fail_tmo, S_IRUGO | S_IWUSR,
+ show_fc_rport_fast_io_fail_tmo, store_fc_rport_fast_io_fail_tmo);
/*
int val; \
struct Scsi_Host *shost = transport_class_to_shost(cdev); \
struct fc_internal *i = to_fc_internal(shost->transportt); \
+ char *cp; \
\
- val = simple_strtoul(buf, NULL, 0); \
+ val = simple_strtoul(buf, &cp, 0); \
+ if (*cp && (*cp != '\n')) \
+ return -EINVAL; \
i->f->set_host_##field(shost, val); \
return count; \
}
+#define fc_host_store_str_function(field, slen) \
+static ssize_t \
+store_fc_host_##field(struct class_device *cdev, const char *buf, \
+ size_t count) \
+{ \
+ struct Scsi_Host *shost = transport_class_to_shost(cdev); \
+ struct fc_internal *i = to_fc_internal(shost->transportt); \
+ unsigned int cnt=count; \
+ \
+ /* count may include a LF at end of string */ \
+ if (buf[cnt-1] == '\n') \
+ cnt--; \
+ if (cnt > ((slen) - 1)) \
+ return -EINVAL; \
+ memcpy(fc_host_##field(shost), buf, cnt); \
+ i->f->set_host_##field(shost); \
+ return count; \
+}
+
#define fc_host_rd_attr(field, format_string, sz) \
fc_host_show_function(field, format_string, sz, ) \
static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO, \
fc_private_host_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
fc_private_host_rd_attr_cast(permanent_port_name, "0x%llx\n", 20,
unsigned long long);
-fc_private_host_rd_attr(symbolic_name, "%s\n", (FC_SYMBOLIC_NAME_SIZE +1));
fc_private_host_rd_attr(maxframe_size, "%u bytes\n", 20);
fc_private_host_rd_attr(serial_number, "%s\n", (FC_SERIAL_NUMBER_SIZE +1));
fc_host_rd_enum_attr(port_type, FC_PORTTYPE_MAX_NAMELEN);
fc_host_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN);
fc_host_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long);
+fc_host_rd_attr(symbolic_name, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
+
+fc_private_host_show_function(system_hostname, "%s\n",
+ FC_SYMBOLIC_NAME_SIZE + 1, )
+fc_host_store_str_function(system_hostname, FC_SYMBOLIC_NAME_SIZE)
+static FC_CLASS_DEVICE_ATTR(host, system_hostname, S_IRUGO | S_IWUSR,
+ show_fc_host_system_hostname, store_fc_host_system_hostname);
/* Private Host Attributes */
while (!list_empty(&fc_host_rport_bindings(shost))) {
get_list_head_entry(rport,
&fc_host_rport_bindings(shost), peers);
- spin_unlock_irqrestore(shost->host_lock, flags);
- fc_rport_terminate(rport);
- spin_lock_irqsave(shost->host_lock, flags);
+ list_del(&rport->peers);
+ rport->port_state = FC_PORTSTATE_DELETED;
+ fc_queue_work(shost, &rport->rport_delete_work);
}
spin_unlock_irqrestore(shost->host_lock, flags);
}
}
+/**
+ * fc_timed_out - FC Transport I/O timeout intercept handler
+ *
+ * @scmd: The SCSI command which timed out
+ *
+ * This routine protects against error handlers getting invoked while a
+ * rport is in a blocked state, typically due to a temporarily loss of
+ * connectivity. If the error handlers are allowed to proceed, requests
+ * to abort i/o, reset the target, etc will likely fail as there is no way
+ * to communicate with the device to perform the requested function. These
+ * failures may result in the midlayer taking the device offline, requiring
+ * manual intervention to restore operation.
+ *
+ * This routine, called whenever an i/o times out, validates the state of
+ * the underlying rport. If the rport is blocked, it returns
+ * EH_RESET_TIMER, which will continue to reschedule the timeout.
+ * Eventually, either the device will return, or devloss_tmo will fire,
+ * and when the timeout then fires, it will be handled normally.
+ * If the rport is not blocked, normal error handling continues.
+ *
+ * Notes:
+ * This routine assumes no locks are held on entry.
+ **/
+static enum scsi_eh_timer_return
+fc_timed_out(struct scsi_cmnd *scmd)
+{
+ struct fc_rport *rport = starget_to_rport(scsi_target(scmd->device));
+
+ if (rport->port_state == FC_PORTSTATE_BLOCKED)
+ return EH_RESET_TIMER;
+
+ return EH_NOT_HANDLED;
+}
+
/*
* Must be called with shost->host_lock held
*/
struct scsi_transport_template *
fc_attach_transport(struct fc_function_template *ft)
{
- struct fc_internal *i = kmalloc(sizeof(struct fc_internal),
- GFP_KERNEL);
int count;
+ struct fc_internal *i = kzalloc(sizeof(struct fc_internal),
+ GFP_KERNEL);
if (unlikely(!i))
return NULL;
- memset(i, 0, sizeof(struct fc_internal));
-
i->t.target_attrs.ac.attrs = &i->starget_attrs[0];
i->t.target_attrs.ac.class = &fc_transport_class.class;
i->t.target_attrs.ac.match = fc_target_match;
/* Transport uses the shost workq for scsi scanning */
i->t.create_work_queue = 1;
+ i->t.eh_timed_out = fc_timed_out;
+
i->t.user_scan = fc_user_scan;
/*
SETUP_HOST_ATTRIBUTE_RD(permanent_port_name);
SETUP_HOST_ATTRIBUTE_RD(supported_classes);
SETUP_HOST_ATTRIBUTE_RD(supported_fc4s);
- SETUP_HOST_ATTRIBUTE_RD(symbolic_name);
SETUP_HOST_ATTRIBUTE_RD(supported_speeds);
SETUP_HOST_ATTRIBUTE_RD(maxframe_size);
SETUP_HOST_ATTRIBUTE_RD(serial_number);
SETUP_HOST_ATTRIBUTE_RD(active_fc4s);
SETUP_HOST_ATTRIBUTE_RD(speed);
SETUP_HOST_ATTRIBUTE_RD(fabric_name);
+ SETUP_HOST_ATTRIBUTE_RD(symbolic_name);
+ SETUP_HOST_ATTRIBUTE_RW(system_hostname);
/* Transport-managed attributes */
SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type);
SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(roles);
SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_state);
SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(scsi_target_id);
+ if (ft->terminate_rport_io)
+ SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(fast_io_fail_tmo);
BUG_ON(count > FC_RPORT_NUM_ATTRS);
}
EXPORT_SYMBOL(fc_release_transport);
+/**
+ * fc_queue_work - Queue work to the fc_host workqueue.
+ * @shost: Pointer to Scsi_Host bound to fc_host.
+ * @work: Work to queue for execution.
+ *
+ * Return value:
+ * 1 - work queued for execution
+ * 0 - work is already queued
+ * -EINVAL - work queue doesn't exist
+ **/
+static int
+fc_queue_work(struct Scsi_Host *shost, struct work_struct *work)
+{
+ if (unlikely(!fc_host_work_q(shost))) {
+ printk(KERN_ERR
+ "ERROR: FC host '%s' attempted to queue work, "
+ "when no workqueue created.\n", shost->hostt->name);
+ dump_stack();
+
+ return -EINVAL;
+ }
+
+ return queue_work(fc_host_work_q(shost), work);
+}
+
+/**
+ * fc_flush_work - Flush a fc_host's workqueue.
+ * @shost: Pointer to Scsi_Host bound to fc_host.
+ **/
+static void
+fc_flush_work(struct Scsi_Host *shost)
+{
+ if (!fc_host_work_q(shost)) {
+ printk(KERN_ERR
+ "ERROR: FC host '%s' attempted to flush work, "
+ "when no workqueue created.\n", shost->hostt->name);
+ dump_stack();
+ return;
+ }
+
+ flush_workqueue(fc_host_work_q(shost));
+}
+
+/**
+ * fc_queue_devloss_work - Schedule work for the fc_host devloss workqueue.
+ * @shost: Pointer to Scsi_Host bound to fc_host.
+ * @work: Work to queue for execution.
+ * @delay: jiffies to delay the work queuing
+ *
+ * Return value:
+ * 1 on success / 0 already queued / < 0 for error
+ **/
+static int
+fc_queue_devloss_work(struct Scsi_Host *shost, struct delayed_work *work,
+ unsigned long delay)
+{
+ if (unlikely(!fc_host_devloss_work_q(shost))) {
+ printk(KERN_ERR
+ "ERROR: FC host '%s' attempted to queue work, "
+ "when no workqueue created.\n", shost->hostt->name);
+ dump_stack();
+
+ return -EINVAL;
+ }
+
+ return queue_delayed_work(fc_host_devloss_work_q(shost), work, delay);
+}
+
+/**
+ * fc_flush_devloss - Flush a fc_host's devloss workqueue.
+ * @shost: Pointer to Scsi_Host bound to fc_host.
+ **/
+static void
+fc_flush_devloss(struct Scsi_Host *shost)
+{
+ if (!fc_host_devloss_work_q(shost)) {
+ printk(KERN_ERR
+ "ERROR: FC host '%s' attempted to flush work, "
+ "when no workqueue created.\n", shost->hostt->name);
+ dump_stack();
+ return;
+ }
+
+ flush_workqueue(fc_host_devloss_work_q(shost));
+}
+
/**
* fc_remove_host - called to terminate any fc_transport-related elements
fc_remove_host(struct Scsi_Host *shost)
{
struct fc_rport *rport, *next_rport;
+ struct workqueue_struct *work_q;
+ struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
/* Remove any remote ports */
list_for_each_entry_safe(rport, next_rport,
- &fc_host_rports(shost), peers)
- fc_rport_terminate(rport);
+ &fc_host->rports, peers) {
+ list_del(&rport->peers);
+ rport->port_state = FC_PORTSTATE_DELETED;
+ fc_queue_work(shost, &rport->rport_delete_work);
+ }
+
list_for_each_entry_safe(rport, next_rport,
- &fc_host_rport_bindings(shost), peers)
- fc_rport_terminate(rport);
+ &fc_host->rport_bindings, peers) {
+ list_del(&rport->peers);
+ rport->port_state = FC_PORTSTATE_DELETED;
+ fc_queue_work(shost, &rport->rport_delete_work);
+ }
+
+ /* flush all scan work items */
+ scsi_flush_work(shost);
+
+ /* flush all stgt delete, and rport delete work items, then kill it */
+ if (fc_host->work_q) {
+ work_q = fc_host->work_q;
+ fc_host->work_q = NULL;
+ destroy_workqueue(work_q);
+ }
+
+ /* flush all devloss work items, then kill it */
+ if (fc_host->devloss_work_q) {
+ work_q = fc_host->devloss_work_q;
+ fc_host->devloss_work_q = NULL;
+ destroy_workqueue(work_q);
+ }
}
EXPORT_SYMBOL(fc_remove_host);
-/*
- * fc_rport_tgt_remove - Removes the scsi target on the remote port
- * @rport: The remote port to be operated on
- */
+
+/**
+ * fc_starget_delete - called to delete the scsi decendents of an rport
+ * (target and all sdevs)
+ *
+ * @work: remote port to be operated on.
+ **/
static void
-fc_rport_tgt_remove(struct fc_rport *rport)
+fc_starget_delete(struct work_struct *work)
{
+ struct fc_rport *rport =
+ container_of(work, struct fc_rport, stgt_delete_work);
struct Scsi_Host *shost = rport_to_shost(rport);
+ unsigned long flags;
+ struct fc_internal *i = to_fc_internal(shost->transportt);
- scsi_target_unblock(&rport->dev);
+ /*
+ * Involve the LLDD if possible. All io on the rport is to
+ * be terminated, either as part of the dev_loss_tmo callback
+ * processing, or via the terminate_rport_io function.
+ */
+ if (i->f->dev_loss_tmo_callbk)
+ i->f->dev_loss_tmo_callbk(rport);
+ else if (i->f->terminate_rport_io)
+ i->f->terminate_rport_io(rport);
- /* Stop anything on the workq */
- if (!cancel_delayed_work(&rport->dev_loss_work))
- flush_scheduled_work();
- scsi_flush_work(shost);
+ spin_lock_irqsave(shost->host_lock, flags);
+ if (rport->flags & FC_RPORT_DEVLOSS_PENDING) {
+ spin_unlock_irqrestore(shost->host_lock, flags);
+ if (!cancel_delayed_work(&rport->fail_io_work))
+ fc_flush_devloss(shost);
+ if (!cancel_delayed_work(&rport->dev_loss_work))
+ fc_flush_devloss(shost);
+ spin_lock_irqsave(shost->host_lock, flags);
+ rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
+ }
+ spin_unlock_irqrestore(shost->host_lock, flags);
scsi_remove_target(&rport->dev);
}
+
+/**
+ * fc_rport_final_delete - finish rport termination and delete it.
+ *
+ * @work: remote port to be deleted.
+ **/
+static void
+fc_rport_final_delete(struct work_struct *work)
+{
+ struct fc_rport *rport =
+ container_of(work, struct fc_rport, rport_delete_work);
+ struct device *dev = &rport->dev;
+ struct Scsi_Host *shost = rport_to_shost(rport);
+ struct fc_internal *i = to_fc_internal(shost->transportt);
+
+ /*
+ * if a scan is pending, flush the SCSI Host work_q so that
+ * that we can reclaim the rport scan work element.
+ */
+ if (rport->flags & FC_RPORT_SCAN_PENDING)
+ scsi_flush_work(shost);
+
+ /* Delete SCSI target and sdevs */
+ if (rport->scsi_target_id != -1)
+ fc_starget_delete(&rport->stgt_delete_work);
+ else if (i->f->dev_loss_tmo_callbk)
+ i->f->dev_loss_tmo_callbk(rport);
+ else if (i->f->terminate_rport_io)
+ i->f->terminate_rport_io(rport);
+
+ transport_remove_device(dev);
+ device_del(dev);
+ transport_destroy_device(dev);
+ put_device(&shost->shost_gendev); /* for fc_host->rport list */
+ put_device(dev); /* for self-reference */
+}
+
+
/**
* fc_rport_create - allocates and creates a remote FC port.
* @shost: scsi host the remote port is connected to.
fc_rport_create(struct Scsi_Host *shost, int channel,
struct fc_rport_identifiers *ids)
{
- struct fc_host_attrs *fc_host =
- (struct fc_host_attrs *)shost->shost_data;
+ struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
struct fc_internal *fci = to_fc_internal(shost->transportt);
struct fc_rport *rport;
struct device *dev;
size_t size;
size = (sizeof(struct fc_rport) + fci->f->dd_fcrport_size);
- rport = kmalloc(size, GFP_KERNEL);
+ rport = kzalloc(size, GFP_KERNEL);
if (unlikely(!rport)) {
printk(KERN_ERR "%s: allocation failure\n", __FUNCTION__);
return NULL;
}
- memset(rport, 0, size);
rport->maxframe_size = -1;
rport->supported_classes = FC_COS_UNSPECIFIED;
if (fci->f->dd_fcrport_size)
rport->dd_data = &rport[1];
rport->channel = channel;
+ rport->fast_io_fail_tmo = -1;
- INIT_WORK(&rport->dev_loss_work, fc_timeout_deleted_rport, rport);
- INIT_WORK(&rport->scan_work, fc_scsi_scan_rport, rport);
+ INIT_DELAYED_WORK(&rport->dev_loss_work, fc_timeout_deleted_rport);
+ INIT_DELAYED_WORK(&rport->fail_io_work, fc_timeout_fail_rport_io);
+ INIT_WORK(&rport->scan_work, fc_scsi_scan_rport);
+ INIT_WORK(&rport->stgt_delete_work, fc_starget_delete);
+ INIT_WORK(&rport->rport_delete_work, fc_rport_final_delete);
spin_lock_irqsave(shost->host_lock, flags);
rport->scsi_target_id = fc_host->next_target_id++;
else
rport->scsi_target_id = -1;
- list_add_tail(&rport->peers, &fc_host_rports(shost));
- get_device(&shost->shost_gendev);
+ list_add_tail(&rport->peers, &fc_host->rports);
+ get_device(&shost->shost_gendev); /* for fc_host->rport list */
spin_unlock_irqrestore(shost->host_lock, flags);
dev = &rport->dev;
- device_initialize(dev);
- dev->parent = get_device(&shost->shost_gendev);
+ device_initialize(dev); /* takes self reference */
+ dev->parent = get_device(&shost->shost_gendev); /* parent reference */
dev->release = fc_rport_dev_release;
sprintf(dev->bus_id, "rport-%d:%d-%d",
shost->host_no, channel, rport->number);
transport_add_device(dev);
transport_configure_device(dev);
- if (rport->roles & FC_RPORT_ROLE_FCP_TARGET)
+ if (rport->roles & FC_RPORT_ROLE_FCP_TARGET) {
/* initiate a scan of the target */
+ rport->flags |= FC_RPORT_SCAN_PENDING;
scsi_queue_work(shost, &rport->scan_work);
+ }
return rport;
delete_rport:
transport_destroy_device(dev);
- put_device(dev->parent);
spin_lock_irqsave(shost->host_lock, flags);
list_del(&rport->peers);
- put_device(&shost->shost_gendev);
+ put_device(&shost->shost_gendev); /* for fc_host->rport list */
spin_unlock_irqrestore(shost->host_lock, flags);
put_device(dev->parent);
kfree(rport);
struct fc_rport_identifiers *ids)
{
struct fc_internal *fci = to_fc_internal(shost->transportt);
+ struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
struct fc_rport *rport;
unsigned long flags;
int match = 0;
+ /* ensure any stgt delete functions are done */
+ fc_flush_work(shost);
+
/*
* Search the list of "active" rports, for an rport that has been
* deleted, but we've held off the real delete while the target
*/
spin_lock_irqsave(shost->host_lock, flags);
- list_for_each_entry(rport, &fc_host_rports(shost), peers) {
+ list_for_each_entry(rport, &fc_host->rports, peers) {
if ((rport->port_state == FC_PORTSTATE_BLOCKED) &&
(rport->channel == channel)) {
- switch (fc_host_tgtid_bind_type(shost)) {
+ switch (fc_host->tgtid_bind_type) {
case FC_TGTID_BIND_BY_WWPN:
case FC_TGTID_BIND_NONE:
if (rport->port_name == ids->port_name)
}
if (match) {
- struct work_struct *work =
+ struct delayed_work *work =
&rport->dev_loss_work;
memcpy(&rport->node_name, &ids->node_name,
/* restart the target */
/*
- * Stop the target timer first. Take no action
+ * Stop the target timers first. Take no action
* on the del_timer failure as the state
* machine state change will validate the
* transaction.
*/
+ if (!cancel_delayed_work(&rport->fail_io_work))
+ fc_flush_devloss(shost);
if (!cancel_delayed_work(work))
- flush_scheduled_work();
+ fc_flush_devloss(shost);
+
+ spin_lock_irqsave(shost->host_lock, flags);
+
+ rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
/* initiate a scan of the target */
+ rport->flags |= FC_RPORT_SCAN_PENDING;
scsi_queue_work(shost, &rport->scan_work);
+ spin_unlock_irqrestore(shost->host_lock, flags);
+
+ scsi_target_unblock(&rport->dev);
+
return rport;
}
}
}
/* Search the bindings array */
- if (fc_host_tgtid_bind_type(shost) != FC_TGTID_BIND_NONE) {
+ if (fc_host->tgtid_bind_type != FC_TGTID_BIND_NONE) {
/* search for a matching consistent binding */
- list_for_each_entry(rport, &fc_host_rport_bindings(shost),
+ list_for_each_entry(rport, &fc_host->rport_bindings,
peers) {
if (rport->channel != channel)
continue;
- switch (fc_host_tgtid_bind_type(shost)) {
+ switch (fc_host->tgtid_bind_type) {
case FC_TGTID_BIND_BY_WWPN:
if (rport->port_name == ids->port_name)
match = 1;
}
if (match) {
- list_move_tail(&rport->peers,
- &fc_host_rports(shost));
+ list_move_tail(&rport->peers, &fc_host->rports);
break;
}
}
rport->roles = ids->roles;
rport->port_state = FC_PORTSTATE_ONLINE;
- spin_unlock_irqrestore(shost->host_lock, flags);
-
if (fci->f->dd_fcrport_size)
memset(rport->dd_data, 0,
fci->f->dd_fcrport_size);
- if (rport->roles & FC_RPORT_ROLE_FCP_TARGET)
+ if (rport->roles & FC_RPORT_ROLE_FCP_TARGET) {
/* initiate a scan of the target */
+ rport->flags |= FC_RPORT_SCAN_PENDING;
scsi_queue_work(shost, &rport->scan_work);
+ spin_unlock_irqrestore(shost->host_lock, flags);
+ scsi_target_unblock(&rport->dev);
+ } else
+ spin_unlock_irqrestore(shost->host_lock, flags);
return rport;
}
}
EXPORT_SYMBOL(fc_remote_port_add);
-/*
- * fc_rport_terminate - this routine tears down and deallocates a remote port.
- * @rport: The remote port to be terminated
- *
- * Notes:
- * This routine assumes no locks are held on entry.
- */
-static void
-fc_rport_terminate(struct fc_rport *rport)
-{
- struct Scsi_Host *shost = rport_to_shost(rport);
- struct device *dev = &rport->dev;
- unsigned long flags;
-
- fc_rport_tgt_remove(rport);
-
- transport_remove_device(dev);
- device_del(dev);
- transport_destroy_device(dev);
- spin_lock_irqsave(shost->host_lock, flags);
- list_del(&rport->peers);
- spin_unlock_irqrestore(shost->host_lock, flags);
- put_device(&shost->shost_gendev);
-}
/**
* fc_remote_port_delete - notifies the fc transport that a remote
void
fc_remote_port_delete(struct fc_rport *rport)
{
+ struct Scsi_Host *shost = rport_to_shost(rport);
+ struct fc_internal *i = to_fc_internal(shost->transportt);
int timeout = rport->dev_loss_tmo;
+ unsigned long flags;
+
+ /*
+ * No need to flush the fc_host work_q's, as all adds are synchronous.
+ *
+ * We do need to reclaim the rport scan work element, so eventually
+ * (in fc_rport_final_delete()) we'll flush the scsi host work_q if
+ * there's still a scan pending.
+ */
+
+ spin_lock_irqsave(shost->host_lock, flags);
/* If no scsi target id mapping, delete it */
if (rport->scsi_target_id == -1) {
- fc_rport_terminate(rport);
+ list_del(&rport->peers);
+ rport->port_state = FC_PORTSTATE_DELETED;
+ fc_queue_work(shost, &rport->rport_delete_work);
+ spin_unlock_irqrestore(shost->host_lock, flags);
return;
}
+ rport->port_state = FC_PORTSTATE_BLOCKED;
+
+ rport->flags |= FC_RPORT_DEVLOSS_PENDING;
+
+ spin_unlock_irqrestore(shost->host_lock, flags);
+
scsi_target_block(&rport->dev);
- /* cap the length the devices can be blocked until they are deleted */
- schedule_delayed_work(&rport->dev_loss_work, timeout * HZ);
+ /* see if we need to kill io faster than waiting for device loss */
+ if ((rport->fast_io_fail_tmo != -1) &&
+ (rport->fast_io_fail_tmo < timeout) && (i->f->terminate_rport_io))
+ fc_queue_devloss_work(shost, &rport->fail_io_work,
+ rport->fast_io_fail_tmo * HZ);
- rport->port_state = FC_PORTSTATE_BLOCKED;
+ /* cap the length the devices can be blocked until they are deleted */
+ fc_queue_devloss_work(shost, &rport->dev_loss_work, timeout * HZ);
}
EXPORT_SYMBOL(fc_remote_port_delete);
fc_remote_port_rolechg(struct fc_rport *rport, u32 roles)
{
struct Scsi_Host *shost = rport_to_shost(rport);
- struct fc_host_attrs *fc_host =
- (struct fc_host_attrs *)shost->shost_data;
+ struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
unsigned long flags;
int create = 0;
} else if (!(rport->roles & FC_RPORT_ROLE_FCP_TARGET))
create = 1;
}
- spin_unlock_irqrestore(shost->host_lock, flags);
rport->roles = roles;
+ spin_unlock_irqrestore(shost->host_lock, flags);
+
if (create) {
/*
* There may have been a delete timer running on the
* machine state change will validate the
* transaction.
*/
+ if (!cancel_delayed_work(&rport->fail_io_work))
+ fc_flush_devloss(shost);
if (!cancel_delayed_work(&rport->dev_loss_work))
- flush_scheduled_work();
+ fc_flush_devloss(shost);
+
+ spin_lock_irqsave(shost->host_lock, flags);
+ rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
+ spin_unlock_irqrestore(shost->host_lock, flags);
+
+ /* ensure any stgt delete functions are done */
+ fc_flush_work(shost);
/* initiate a scan of the target */
+ spin_lock_irqsave(shost->host_lock, flags);
+ rport->flags |= FC_RPORT_SCAN_PENDING;
scsi_queue_work(shost, &rport->scan_work);
+ spin_unlock_irqrestore(shost->host_lock, flags);
+ scsi_target_unblock(&rport->dev);
}
}
EXPORT_SYMBOL(fc_remote_port_rolechg);
* was a SCSI target (thus was blocked), and failed
* to return in the alloted time.
*
- * @data: rport target that failed to reappear in the alloted time.
+ * @work: rport target that failed to reappear in the alloted time.
**/
static void
-fc_timeout_deleted_rport(void *data)
+fc_timeout_deleted_rport(struct work_struct *work)
{
- struct fc_rport *rport = (struct fc_rport *)data;
+ struct fc_rport *rport =
+ container_of(work, struct fc_rport, dev_loss_work.work);
struct Scsi_Host *shost = rport_to_shost(rport);
+ struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
unsigned long flags;
spin_lock_irqsave(shost->host_lock, flags);
+ rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
+
/*
- * If the port is ONLINE, then it came back, but was no longer an
- * FCP target. Thus we need to tear down the scsi_target on it.
+ * If the port is ONLINE, then it came back. Validate it's still an
+ * FCP target. If not, tear down the scsi_target on it.
*/
- if (rport->port_state == FC_PORTSTATE_ONLINE) {
- spin_unlock_irqrestore(shost->host_lock, flags);
-
+ if ((rport->port_state == FC_PORTSTATE_ONLINE) &&
+ !(rport->roles & FC_RPORT_ROLE_FCP_TARGET)) {
dev_printk(KERN_ERR, &rport->dev,
- "blocked FC remote port time out: removing target\n");
-
- fc_rport_tgt_remove(rport);
-
+ "blocked FC remote port time out: no longer"
+ " a FCP target, removing starget\n");
+ spin_unlock_irqrestore(shost->host_lock, flags);
+ scsi_target_unblock(&rport->dev);
+ fc_queue_work(shost, &rport->stgt_delete_work);
return;
}
return;
}
- if (fc_host_tgtid_bind_type(shost) == FC_TGTID_BIND_NONE) {
- spin_unlock_irqrestore(shost->host_lock, flags);
+ if (fc_host->tgtid_bind_type == FC_TGTID_BIND_NONE) {
+ list_del(&rport->peers);
+ rport->port_state = FC_PORTSTATE_DELETED;
dev_printk(KERN_ERR, &rport->dev,
"blocked FC remote port time out: removing target\n");
- fc_rport_terminate(rport);
+ fc_queue_work(shost, &rport->rport_delete_work);
+ spin_unlock_irqrestore(shost->host_lock, flags);
return;
}
"blocked FC remote port time out: removing target and "
"saving binding\n");
- list_move_tail(&rport->peers, &fc_host_rport_bindings(shost));
+ list_move_tail(&rport->peers, &fc_host->rport_bindings);
/*
* Note: We do not remove or clear the hostdata area. This allows
rport->maxframe_size = -1;
rport->supported_classes = FC_COS_UNSPECIFIED;
rport->roles = FC_RPORT_ROLE_UNKNOWN;
- rport->port_state = FC_PORTSTATE_DELETED;
+ rport->port_state = FC_PORTSTATE_NOTPRESENT;
/* remove the identifiers that aren't used in the consisting binding */
- switch (fc_host_tgtid_bind_type(shost)) {
+ switch (fc_host->tgtid_bind_type) {
case FC_TGTID_BIND_BY_WWPN:
rport->node_name = -1;
rport->port_id = -1;
* As this only occurs if the remote port (scsi target)
* went away and didn't come back - we'll remove
* all attached scsi devices.
- *
- * We'll schedule the shost work item to perform the actual removal
- * to avoid recursion in the different flush calls if we perform
- * the removal in each target - and there are lots of targets
- * whose timeouts fire at the same time.
*/
-
- if ( !(fc_host_flags(shost) & FC_SHOST_RPORT_DEL_SCHEDULED)) {
- fc_host_flags(shost) |= FC_SHOST_RPORT_DEL_SCHEDULED;
- scsi_queue_work(shost, &fc_host_rport_del_work(shost));
- }
-
spin_unlock_irqrestore(shost->host_lock, flags);
+
+ scsi_target_unblock(&rport->dev);
+ fc_queue_work(shost, &rport->stgt_delete_work);
}
/**
- * fc_scsi_scan_rport - called to perform a scsi scan on a remote port.
+ * fc_timeout_fail_rport_io - Timeout handler for a fast io failing on a
+ * disconnected SCSI target.
*
- * Will unblock the target (in case it went away and has now come back),
- * then invoke a scan.
+ * @work: rport to terminate io on.
*
- * @data: remote port to be scanned.
+ * Notes: Only requests the failure of the io, not that all are flushed
+ * prior to returning.
**/
static void
-fc_scsi_scan_rport(void *data)
+fc_timeout_fail_rport_io(struct work_struct *work)
{
- struct fc_rport *rport = (struct fc_rport *)data;
+ struct fc_rport *rport =
+ container_of(work, struct fc_rport, fail_io_work.work);
+ struct Scsi_Host *shost = rport_to_shost(rport);
+ struct fc_internal *i = to_fc_internal(shost->transportt);
- scsi_target_unblock(&rport->dev);
- scsi_scan_target(&rport->dev, rport->channel, rport->scsi_target_id,
- SCAN_WILD_CARD, 1);
-}
+ if (rport->port_state != FC_PORTSTATE_BLOCKED)
+ return;
+ i->f->terminate_rport_io(rport);
+}
/**
- * fc_shost_remove_rports - called to remove all rports that are marked
- * as in a deleted (not connected) state.
- *
- * @data: shost whose rports are to be looked at
+ * fc_scsi_scan_rport - called to perform a scsi scan on a remote port.
+ *
+ * @work: remote port to be scanned.
**/
static void
-fc_shost_remove_rports(void *data)
+fc_scsi_scan_rport(struct work_struct *work)
{
- struct Scsi_Host *shost = (struct Scsi_Host *)data;
- struct fc_rport *rport, *next_rport;
+ struct fc_rport *rport =
+ container_of(work, struct fc_rport, scan_work);
+ struct Scsi_Host *shost = rport_to_shost(rport);
unsigned long flags;
- spin_lock_irqsave(shost->host_lock, flags);
- while (fc_host_flags(shost) & FC_SHOST_RPORT_DEL_SCHEDULED) {
-
- fc_host_flags(shost) &= ~FC_SHOST_RPORT_DEL_SCHEDULED;
-
-restart_search:
- list_for_each_entry_safe(rport, next_rport,
- &fc_host_rport_bindings(shost), peers) {
- if (rport->port_state == FC_PORTSTATE_DELETED) {
- rport->port_state = FC_PORTSTATE_NOTPRESENT;
- spin_unlock_irqrestore(shost->host_lock, flags);
- fc_rport_tgt_remove(rport);
- spin_lock_irqsave(shost->host_lock, flags);
- goto restart_search;
- }
- }
-
+ if ((rport->port_state == FC_PORTSTATE_ONLINE) &&
+ (rport->roles & FC_RPORT_ROLE_FCP_TARGET)) {
+ scsi_scan_target(&rport->dev, rport->channel,
+ rport->scsi_target_id, SCAN_WILD_CARD, 1);
}
+
+ spin_lock_irqsave(shost->host_lock, flags);
+ rport->flags &= ~FC_RPORT_SCAN_PENDING;
spin_unlock_irqrestore(shost->host_lock, flags);
}
git://git.onelab.eu / linux-2.6.git / blobdiff