#include <net/netlink.h>
#include <scsi/scsi_netlink_fc.h>
#include "scsi_priv.h"
+#include "scsi_transport_fc_internal.h"
static int fc_queue_work(struct Scsi_Host *, struct work_struct *);
static void fc_vport_sched_delete(struct work_struct *work);
*/
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_param_named(dev_loss_tmo, fc_dev_loss_tmo, uint, S_IRUGO|S_IWUSR);
MODULE_PARM_DESC(dev_loss_tmo,
"Maximum number of seconds that the FC transport should"
" insulate the loss of a remote port. Once this value is"
" 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
+ * We could have inlined 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)
{
/**
* 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
*
* 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)
/**
- * fc_host_post_vendor_event - called to post a vendor unique event on
- * a fc_host
- *
+ * fc_host_post_vendor_event - called to post a vendor unique event on an 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
+ * @vendor_id: Vendor id
*
* 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)
/**
* 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
*
* Notes:
* This routine assumes no locks are held on entry.
- **/
+ */
static enum scsi_eh_timer_return
fc_timed_out(struct scsi_cmnd *scmd)
{
return 0;
}
+static int fc_tsk_mgmt_response(struct Scsi_Host *shost, u64 nexus, u64 tm_id,
+ int result)
+{
+ struct fc_internal *i = to_fc_internal(shost->transportt);
+ return i->f->tsk_mgmt_response(shost, nexus, tm_id, result);
+}
+
+static int fc_it_nexus_response(struct Scsi_Host *shost, u64 nexus, int result)
+{
+ struct fc_internal *i = to_fc_internal(shost->transportt);
+ return i->f->it_nexus_response(shost, nexus, result);
+}
+
struct scsi_transport_template *
fc_attach_transport(struct fc_function_template *ft)
{
i->t.user_scan = fc_user_scan;
+ /* target-mode drivers' functions */
+ i->t.tsk_mgmt_response = fc_tsk_mgmt_response;
+ i->t.it_nexus_response = fc_it_nexus_response;
+
/*
* Setup SCSI Target Attributes.
*/
* 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)
{
/**
* 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)
{
*
* 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)
/**
* 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)
{
/**
- * fc_remove_host - called to terminate any fc_transport-related elements
- * for a scsi host.
- * @rport: remote port to be unblocked.
+ * fc_remove_host - called to terminate any fc_transport-related elements for a scsi host.
+ * @shost: Which &Scsi_Host
*
* This routine is expected to be called immediately preceeding the
* a driver's call to scsi_remove_host().
*
* WARNING: A driver utilizing the fc_transport, which fails to call
- * this routine prior to scsi_remote_host(), will leave dangling
+ * this routine prior to scsi_remove_host(), will leave dangling
* objects in /sys/class/fc_remote_ports. Access to any of these
* objects can result in a system crash !!!
*
* Notes:
* This routine assumes no locks are held on entry.
- **/
+ */
void
fc_remove_host(struct Scsi_Host *shost)
{
/**
* fc_starget_delete - called to delete the scsi decendents of an rport
- * (target and all sdevs)
- *
* @work: remote port to be operated on.
- **/
+ *
+ * Deletes target and all sdevs.
+ */
static void
fc_starget_delete(struct work_struct *work)
{
/**
* 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)
{
*
* Notes:
* This routine assumes no locks are held on entry.
- **/
-struct fc_rport *
+ */
+static struct fc_rport *
fc_rport_create(struct Scsi_Host *shost, int channel,
struct fc_rport_identifiers *ids)
{
}
/**
- * fc_remote_port_add - notifies the fc transport of the existence
- * of a remote FC port.
+ * fc_remote_port_add - notify fc transport of the existence of a remote FC port.
* @shost: scsi host the remote port is connected to.
* @channel: Channel on shost port connected to.
* @ids: The world wide names, fc address, and FC4 port
*
* Notes:
* This routine assumes no locks are held on entry.
- **/
+ */
struct fc_rport *
fc_remote_port_add(struct Scsi_Host *shost, int channel,
struct fc_rport_identifiers *ids)
/**
- * fc_remote_port_delete - notifies the fc transport that a remote
- * port is no longer in existence.
+ * fc_remote_port_delete - notifies the fc transport that a remote port is no longer in existence.
* @rport: The remote port that no longer exists
*
* The LLDD calls this routine to notify the transport that a remote
* port is no longer part of the topology. Note: Although a port
* may no longer be part of the topology, it may persist in the remote
* ports displayed by the fc_host. We do this under 2 conditions:
- * - If the port was a scsi target, we delay its deletion by "blocking" it.
+ * 1) If the port was a scsi target, we delay its deletion by "blocking" it.
* This allows the port to temporarily disappear, then reappear without
* disrupting the SCSI device tree attached to it. During the "blocked"
* period the port will still exist.
- * - If the port was a scsi target and disappears for longer than we
+ * 2) If the port was a scsi target and disappears for longer than we
* expect, we'll delete the port and the tear down the SCSI device tree
* attached to it. However, we want to semi-persist the target id assigned
* to that port if it eventually does exist. The port structure will
* temporary blocked state. From the LLDD's perspective, the rport no
* longer exists. From the SCSI midlayer's perspective, the SCSI target
* exists, but all sdevs on it are blocked from further I/O. The following
- * is then expected:
+ * is then expected.
+ *
* If the remote port does not return (signaled by a LLDD call to
* fc_remote_port_add()) within the dev_loss_tmo timeout, then the
* scsi target is removed - killing all outstanding i/o and removing the
*
* Notes:
* This routine assumes no locks are held on entry.
- **/
+ */
void
fc_remote_port_delete(struct fc_rport *rport)
{
spin_unlock_irqrestore(shost->host_lock, flags);
+ if (rport->roles & FC_PORT_ROLE_FCP_INITIATOR &&
+ shost->active_mode & MODE_TARGET)
+ fc_tgt_it_nexus_destroy(shost, (unsigned long)rport);
+
scsi_target_block(&rport->dev);
/* see if we need to kill io faster than waiting for device loss */
EXPORT_SYMBOL(fc_remote_port_delete);
/**
- * fc_remote_port_rolechg - notifies the fc transport that the roles
- * on a remote may have changed.
+ * fc_remote_port_rolechg - notifies the fc transport that the roles on a remote may have changed.
* @rport: The remote port that changed.
+ * @roles: New roles for this port.
*
- * The LLDD calls this routine to notify the transport that the roles
- * on a remote port may have changed. The largest effect of this is
+ * Description: The LLDD calls this routine to notify the transport that the
+ * roles on a remote port may have changed. The largest effect of this is
* if a port now becomes a FCP Target, it must be allocated a
* scsi target id. If the port is no longer a FCP target, any
* scsi target id value assigned to it will persist in case the
*
* Notes:
* This routine assumes no locks are held on entry.
- **/
+ */
void
fc_remote_port_rolechg(struct fc_rport *rport, u32 roles)
{
struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
unsigned long flags;
int create = 0;
+ int ret;
spin_lock_irqsave(shost->host_lock, flags);
if (roles & FC_PORT_ROLE_FCP_TARGET) {
create = 1;
} else if (!(rport->roles & FC_PORT_ROLE_FCP_TARGET))
create = 1;
+ } else if (shost->active_mode & MODE_TARGET) {
+ ret = fc_tgt_it_nexus_create(shost, (unsigned long)rport,
+ (char *)&rport->node_name);
+ if (ret)
+ printk(KERN_ERR "FC Remore Port tgt nexus failed %d\n",
+ ret);
}
rport->roles = roles;
EXPORT_SYMBOL(fc_remote_port_rolechg);
/**
- * fc_timeout_deleted_rport - Timeout handler for a deleted remote port,
- * which we blocked, and has now failed to return
- * in the allotted time.
- *
+ * fc_timeout_deleted_rport - Timeout handler for a deleted remote port.
* @work: rport target that failed to reappear in the allotted time.
- **/
+ *
+ * Description: An attempt to delete a remote port blocks, and if it fails
+ * to return in the allotted time this gets called.
+ */
static void
fc_timeout_deleted_rport(struct work_struct *work)
{
}
/**
- * fc_timeout_fail_rport_io - Timeout handler for a fast io failing on a
- * disconnected SCSI target.
- *
+ * fc_timeout_fail_rport_io - Timeout handler for a fast io failing on a disconnected SCSI target.
* @work: rport to terminate io on.
*
* Notes: Only requests the failure of the io, not that all are flushed
* prior to returning.
- **/
+ */
static void
fc_timeout_fail_rport_io(struct work_struct *work)
{
/**
* fc_scsi_scan_rport - called to perform a scsi scan on a remote port.
- *
* @work: remote port to be scanned.
- **/
+ */
static void
fc_scsi_scan_rport(struct work_struct *work)
{
struct fc_rport *rport =
container_of(work, struct fc_rport, scan_work);
struct Scsi_Host *shost = rport_to_shost(rport);
+ struct fc_internal *i = to_fc_internal(shost->transportt);
unsigned long flags;
if ((rport->port_state == FC_PORTSTATE_ONLINE) &&
- (rport->roles & FC_PORT_ROLE_FCP_TARGET)) {
+ (rport->roles & FC_PORT_ROLE_FCP_TARGET) &&
+ !(i->f->disable_target_scan)) {
scsi_scan_target(&rport->dev, rport->channel,
rport->scsi_target_id, SCAN_WILD_CARD, 1);
}
*
* Notes:
* This routine assumes no locks are held on entry.
- **/
+ */
static int
fc_vport_create(struct Scsi_Host *shost, int channel, struct device *pdev,
struct fc_vport_identifiers *ids, struct fc_vport **ret_vport)
*
* Notes:
* This routine assumes no locks are held on entry.
- **/
+ */
int
fc_vport_terminate(struct fc_vport *vport)
{
/**
* fc_vport_sched_delete - workq-based delete request for a vport
- *
* @work: vport to be deleted.
- **/
+ */
static void
fc_vport_sched_delete(struct work_struct *work)
{
git.openpandora.org / pandora-kernel.git / blobdiff