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dmeventd: code mode _get_device_status

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Move _get_device_status() in code.
Use dm_task_no_flush() function when reading status.
(e.g. none blocking for thins pool)
This commit is contained in:
Zdenek Kabelac 2015-10-22 12:36:25 +02:00
parent 15dbd4b56a
commit 81e9ab3156
2 changed files with 25 additions and 20 deletions
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1
WHATS_NEW_DM
View File

@ -1,5 +1,6 @@
Version 1.02.110 -
======================================
Dmeventd read device status with 'noflush'.
Dmeventd closes control device when no device is monitored.
Thin plugin for dmeventd improved percentage usage.
Snapshot plugin for dmeventd improved percentage usage.

44
daemons/dmeventd/dmeventd.c
View File

@ -570,6 +570,30 @@ fail:
return ret;
}
static struct dm_task *_get_device_status(struct thread_status *ts)
{
struct dm_task *dmt = dm_task_create(DM_DEVICE_STATUS);
if (!dmt)
return_NULL;
if (!dm_task_set_uuid(dmt, ts->device.uuid)) {
dm_task_destroy(dmt);
return_NULL;
}
/* Non-blocking status read */
if (!dm_task_no_flush(dmt))
log_warn("WARNING: Can't set no_flush for dm status.");
if (!dm_task_run(dmt)) {
dm_task_destroy(dmt);
return_NULL;
}
return dmt;
}
/*
* Find an existing thread for a device.
*
@ -886,26 +910,6 @@ static void _monitor_unregister(void *arg)
_unlock_mutex();
}
static struct dm_task *_get_device_status(struct thread_status *ts)
{
struct dm_task *dmt = dm_task_create(DM_DEVICE_STATUS);
if (!dmt)
return NULL;
if (!dm_task_set_uuid(dmt, ts->device.uuid)) {
dm_task_destroy(dmt);
return NULL;
}
if (!dm_task_run(dmt)) {
dm_task_destroy(dmt);
return NULL;
}
return dmt;
}
/* Device monitoring thread. */
static void *_monitor_thread(void *arg)
{