diff options
Diffstat (limited to 'usr/src/uts/common/os/log_sysevent.c')
| -rw-r--r-- | usr/src/uts/common/os/log_sysevent.c | 64 |
1 files changed, 48 insertions, 16 deletions
diff --git a/usr/src/uts/common/os/log_sysevent.c b/usr/src/uts/common/os/log_sysevent.c index 9739d4dbdf..0b4fe18af3 100644 --- a/usr/src/uts/common/os/log_sysevent.c +++ b/usr/src/uts/common/os/log_sysevent.c @@ -37,6 +37,7 @@ #include <sys/sysevent_impl.h> #include <sys/sysevent/dev.h> #include <sys/modctl.h> +#include <sys/lofi_impl.h> #include <sys/sysmacros.h> #include <sys/disp.h> #include <sys/autoconf.h> @@ -149,6 +150,9 @@ static kmutex_t event_pause_mutex; static kcondvar_t event_pause_cv; static int event_pause_state = 0; +/* Cached device links for lofi. */ +lofi_nvl_t lofi_devlink_cache; + /*ARGSUSED*/ static void log_event_busy_timeout(void *arg) @@ -438,11 +442,26 @@ log_event_deliver() } /* + * Set up the nvlist based data cache. User by lofi to find + * device name for mapped file. + */ +static void +lofi_nvl_init(lofi_nvl_t *cache) +{ + mutex_init(&cache->ln_lock, NULL, MUTEX_DRIVER, NULL); + cv_init(&cache->ln_cv, NULL, CV_DRIVER, NULL); + (void) nvlist_alloc(&cache->ln_data, NV_UNIQUE_NAME, KM_SLEEP); +} + +/* * log_event_init - Allocate and initialize log_event data structures. */ void log_event_init() { + /* Set up devlink cache for lofi. */ + lofi_nvl_init(&lofi_devlink_cache); + mutex_init(&event_door_mutex, NULL, MUTEX_DEFAULT, NULL); mutex_init(&eventq_head_mutex, NULL, MUTEX_DEFAULT, NULL); @@ -1752,29 +1771,42 @@ log_sysevent(sysevent_t *ev, int flag, sysevent_id_t *eid) static void notify_lofi(sysevent_t *ev) { - static evchan_t *devfs_chan = NULL; nvlist_t *nvlist; - int ret; + char name[10], *class, *driver; + int32_t instance; - if ((strcmp(EC_DEV_ADD, sysevent_get_class_name(ev)) != 0) && - (strcmp(EC_DEV_REMOVE, sysevent_get_class_name(ev)) != 0)) + class = sysevent_get_class_name(ev); + if ((strcmp(EC_DEV_ADD, class) != 0) && + (strcmp(EC_DEV_REMOVE, class) != 0)) { return; - - /* only bind once to avoid bind/unbind storm on busy system */ - if (devfs_chan == NULL) { - if ((ret = sysevent_evc_bind("devfsadm_event_channel", - &devfs_chan, EVCH_CREAT | EVCH_HOLD_PEND)) != 0) { - cmn_err(CE_CONT, "sysevent_evc_bind failed: %d\n", ret); - return; - } } (void) sysevent_get_attr_list(ev, &nvlist); - (void) sysevent_evc_publish(devfs_chan, sysevent_get_class_name(ev), - sysevent_get_subclass_name(ev), "illumos", EC_DEVFS, nvlist, - EVCH_SLEEP); + driver = fnvlist_lookup_string(nvlist, DEV_DRIVER_NAME); + instance = fnvlist_lookup_int32(nvlist, DEV_INSTANCE); + + /* We are only interested about lofi. */ + if (strcmp(driver, "lofi") != 0) { + fnvlist_free(nvlist); + return; + } + + /* + * insert or remove device info, then announce the change + * via cv_broadcast. + */ + (void) snprintf(name, sizeof (name), "%d", instance); + mutex_enter(&lofi_devlink_cache.ln_lock); + if (strcmp(class, EC_DEV_ADD) == 0) { + fnvlist_add_nvlist(lofi_devlink_cache.ln_data, name, nvlist); + } else { + /* Can not use fnvlist_remove() as we can get ENOENT. */ + (void) nvlist_remove_all(lofi_devlink_cache.ln_data, name); + } + cv_broadcast(&lofi_devlink_cache.ln_cv); + mutex_exit(&lofi_devlink_cache.ln_lock); - nvlist_free(nvlist); + fnvlist_free(nvlist); } /* |