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vhost: add active sessions counter

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Before we implement the support for multiple sessions
per device, we still need to make a few intermediate
changes that will require a counter of currently polled
sessions. So here it is.

Change-Id: I0a1d928eafa75efa1b5c2e6670a5ceb282c87fa4
Signed-off-by: Darek Stojaczyk <dariusz.stojaczyk@intel.com>
Reviewed-on: https://review.gerrithub.io/c/441734
Reviewed-by: Pawel Wodkowski <pawelx.wodkowski@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
Chandler-Test-Pool: SPDK Automated Test System <sys_sgsw@intel.com>
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
This commit is contained in:
Darek Stojaczyk 2019-01-23 13:39:40 +01:00 committed by Changpeng Liu
parent bbcb35f58b
commit e8eef29003
2 changed files with 9 additions and 1 deletions
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5
lib/vhost/vhost.c
View File

@ -1072,6 +1072,8 @@ stop_device(int vid)
free(vsession->mem);
spdk_vhost_free_reactor(vdev->lcore);
vdev->lcore = -1;
assert(vdev->active_session_num > 0);
vdev->active_session_num--;
pthread_mutex_unlock(&g_spdk_vhost_mutex);
}
@ -1152,8 +1154,11 @@ start_device(int vid)
free(vsession->mem);
spdk_vhost_free_reactor(vdev->lcore);
vdev->lcore = -1;
goto out;
}
assert(vdev->active_session_num < UINT32_MAX);
vdev->active_session_num++;
out:
pthread_mutex_unlock(&g_spdk_vhost_mutex);
return rc;

5
lib/vhost/vhost_internal.h
View File

@ -157,9 +157,12 @@ struct spdk_vhost_dev {
uint32_t coalescing_delay_us;
uint32_t coalescing_iops_threshold;
/* Active connection to the device */
/* Current connection to the device */
struct spdk_vhost_session *session;
/* Number of started and actively polled sessions */
uint32_t active_session_num;
TAILQ_ENTRY(spdk_vhost_dev) tailq;
};