diff options
Diffstat (limited to 'drivers/scsi/scsi_transport_fc.c')
| -rw-r--r-- | drivers/scsi/scsi_transport_fc.c | 102 |
1 files changed, 46 insertions, 56 deletions
diff --git a/drivers/scsi/scsi_transport_fc.c b/drivers/scsi/scsi_transport_fc.c index 7a7cfe583b2..b1119da6e88 100644 --- a/drivers/scsi/scsi_transport_fc.c +++ b/drivers/scsi/scsi_transport_fc.c @@ -481,9 +481,9 @@ 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; @@ -491,10 +491,10 @@ 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) { @@ -505,7 +505,6 @@ 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 @@ -513,7 +512,7 @@ EXPORT_SYMBOL(fc_get_event_number); * * 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) @@ -579,17 +578,16 @@ EXPORT_SYMBOL(fc_host_post_event); /** - * 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) @@ -1900,7 +1898,6 @@ static int fc_vport_match(struct attribute_container *cont, /** * 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 @@ -1920,7 +1917,7 @@ static int fc_vport_match(struct attribute_container *cont, * * Notes: * This routine assumes no locks are held on entry. - **/ + */ static enum scsi_eh_timer_return fc_timed_out(struct scsi_cmnd *scmd) { @@ -2133,7 +2130,7 @@ EXPORT_SYMBOL(fc_release_transport); * 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) { @@ -2152,7 +2149,7 @@ 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) { @@ -2175,7 +2172,7 @@ 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) @@ -2195,7 +2192,7 @@ fc_queue_devloss_work(struct Scsi_Host *shost, struct delayed_work *work, /** * 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) { @@ -2212,21 +2209,20 @@ 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) { @@ -2281,10 +2277,10 @@ EXPORT_SYMBOL(fc_remove_host); /** * 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) { @@ -2303,9 +2299,8 @@ 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) { @@ -2375,7 +2370,7 @@ fc_rport_final_delete(struct work_struct *work) * * Notes: * This routine assumes no locks are held on entry. - **/ + */ static struct fc_rport * fc_rport_create(struct Scsi_Host *shost, int channel, struct fc_rport_identifiers *ids) @@ -2462,8 +2457,7 @@ delete_rport: } /** - * 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 @@ -2499,7 +2493,7 @@ delete_rport: * * 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) @@ -2683,19 +2677,18 @@ EXPORT_SYMBOL(fc_remote_port_add); /** - * 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 @@ -2709,7 +2702,8 @@ EXPORT_SYMBOL(fc_remote_port_add); * 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 @@ -2731,7 +2725,7 @@ EXPORT_SYMBOL(fc_remote_port_add); * * Notes: * This routine assumes no locks are held on entry. - **/ + */ void fc_remote_port_delete(struct fc_rport *rport) { @@ -2792,12 +2786,12 @@ fc_remote_port_delete(struct fc_rport *rport) 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 @@ -2810,7 +2804,7 @@ EXPORT_SYMBOL(fc_remote_port_delete); * * Notes: * This routine assumes no locks are held on entry. - **/ + */ void fc_remote_port_rolechg(struct fc_rport *rport, u32 roles) { @@ -2875,12 +2869,12 @@ fc_remote_port_rolechg(struct fc_rport *rport, u32 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) { @@ -2984,14 +2978,12 @@ 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) { @@ -3008,9 +3000,8 @@ 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) { @@ -3047,7 +3038,7 @@ fc_scsi_scan_rport(struct work_struct *work) * * 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) @@ -3172,7 +3163,7 @@ delete_vport: * * Notes: * This routine assumes no locks are held on entry. - **/ + */ int fc_vport_terminate(struct fc_vport *vport) { @@ -3232,9 +3223,8 @@ EXPORT_SYMBOL(fc_vport_terminate); /** * 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) { |