diff options
Diffstat (limited to 'drivers/scsi/libfc/fc_libfc.c')
| -rw-r--r-- | drivers/scsi/libfc/fc_libfc.c | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/drivers/scsi/libfc/fc_libfc.c b/drivers/scsi/libfc/fc_libfc.c index ae3abef6523e..5e40dab8f919 100644 --- a/drivers/scsi/libfc/fc_libfc.c +++ b/drivers/scsi/libfc/fc_libfc.c @@ -36,6 +36,10 @@ module_param_named(debug_logging, fc_debug_logging, int, S_IRUGO|S_IWUSR); MODULE_PARM_DESC(debug_logging, "a bit mask of logging levels"); DEFINE_MUTEX(fc_prov_mutex); +static LIST_HEAD(fc_local_ports); +struct blocking_notifier_head fc_lport_notifier_head = + BLOCKING_NOTIFIER_INIT(fc_lport_notifier_head); +EXPORT_SYMBOL(fc_lport_notifier_head); /* * Providers which primarily send requests and PRLIs. @@ -228,6 +232,17 @@ void fc_fill_reply_hdr(struct fc_frame *fp, const struct fc_frame *in_fp, } EXPORT_SYMBOL(fc_fill_reply_hdr); +void fc_lport_iterate(void (*notify)(struct fc_lport *, void *), void *arg) +{ + struct fc_lport *lport; + + mutex_lock(&fc_prov_mutex); + list_for_each_entry(lport, &fc_local_ports, lport_list) + notify(lport, arg); + mutex_unlock(&fc_prov_mutex); +} +EXPORT_SYMBOL(fc_lport_iterate); + /** * fc_fc4_register_provider() - register FC-4 upper-level provider. * @type: FC-4 type, such as FC_TYPE_FCP @@ -270,3 +285,29 @@ void fc_fc4_deregister_provider(enum fc_fh_type type, struct fc4_prov *prov) synchronize_rcu(); } EXPORT_SYMBOL(fc_fc4_deregister_provider); + +/** + * fc_fc4_add_lport() - add new local port to list and run notifiers. + * @lport: The new local port. + */ +void fc_fc4_add_lport(struct fc_lport *lport) +{ + mutex_lock(&fc_prov_mutex); + list_add_tail(&lport->lport_list, &fc_local_ports); + blocking_notifier_call_chain(&fc_lport_notifier_head, + FC_LPORT_EV_ADD, lport); + mutex_unlock(&fc_prov_mutex); +} + +/** + * fc_fc4_del_lport() - remove local port from list and run notifiers. + * @lport: The new local port. + */ +void fc_fc4_del_lport(struct fc_lport *lport) +{ + mutex_lock(&fc_prov_mutex); + list_del(&lport->lport_list); + blocking_notifier_call_chain(&fc_lport_notifier_head, + FC_LPORT_EV_DEL, lport); + mutex_unlock(&fc_prov_mutex); +} |