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vhost: added spdk_vhost_dev_has_feature

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Added helper function to check if vhost controller supports given
feature.

Change-Id: If20883f5dd6d5fedf7fc253239961fdb55ca51fd
Signed-off-by: Dariusz Stojaczyk <dariuszx.stojaczyk@intel.com>
Reviewed-on: https://review.gerrithub.io/373702
Reviewed-by: Daniel Verkamp <daniel.verkamp@intel.com>
Tested-by: SPDK Automated Test System <sys_sgsw@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
This commit is contained in:
Dariusz Stojaczyk 2017-08-10 12:36:29 +02:00 committed by Daniel Verkamp
parent 68048bcfc4
commit ddcc31d645
3 changed files with 10 additions and 4 deletions
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6
lib/vhost/vhost.c
View File

@ -175,6 +175,12 @@ spdk_vhost_vring_desc_to_iov(struct spdk_vhost_dev *vdev, struct iovec *iov,
return 0;
}
bool
spdk_vhost_dev_has_feature(struct spdk_vhost_dev *vdev, unsigned feature_id)
{
return vdev->negotiated_features & (1ULL << feature_id);
}
struct spdk_vhost_dev *
spdk_vhost_dev_find_by_vid(int vid)
{

2
lib/vhost/vhost_internal.h
View File

@ -117,7 +117,7 @@ bool spdk_vhost_vring_desc_is_wr(struct vring_desc *cur_desc);
int spdk_vhost_vring_desc_to_iov(struct spdk_vhost_dev *vdev, struct iovec *iov,
uint16_t *iov_index, const struct vring_desc *desc);
bool spdk_vhost_dev_has_feature(struct spdk_vhost_dev *vdev, unsigned feature_id);
struct spdk_vhost_dev *spdk_vhost_dev_find_by_vid(int vid);
int spdk_vhost_dev_construct(struct spdk_vhost_dev *vdev, const char *name, uint64_t cpumask,

6
lib/vhost/vhost_scsi.c
View File

@ -817,7 +817,7 @@ spdk_vhost_scsi_lun_hotremove(const struct spdk_scsi_lun *lun, void *arg)
assert(lun != NULL);
assert(svdev != NULL);
if ((svdev->vdev.negotiated_features & (1ULL << VIRTIO_SCSI_F_HOTPLUG)) == 0) {
if (!spdk_vhost_dev_has_feature(&svdev->vdev, VIRTIO_SCSI_F_HOTPLUG)) {
SPDK_WARNLOG("%s: hotremove is not enabled for this controller.\n", svdev->vdev.name);
return;
}
@ -883,7 +883,7 @@ spdk_vhost_scsi_dev_add_dev(const char *ctrlr_name, unsigned scsi_dev_num, const
return -EINVAL;
}
if (vdev->lcore != -1 && (svdev->vdev.negotiated_features & (1ULL << VIRTIO_SCSI_F_HOTPLUG)) == 0) {
if (vdev->lcore != -1 && !spdk_vhost_dev_has_feature(vdev, VIRTIO_SCSI_F_HOTPLUG)) {
SPDK_ERRLOG("%s: 'Dev %u' is in use and hot-attach is not enabled for this controller\n",
ctrlr_name, scsi_dev_num);
return -ENOTSUP;
@ -953,7 +953,7 @@ spdk_vhost_scsi_dev_remove_dev(struct spdk_vhost_dev *vdev, unsigned scsi_dev_nu
return 0;
}
if ((svdev->vdev.negotiated_features & (1ULL << VIRTIO_SCSI_F_HOTPLUG)) == 0) {
if (!spdk_vhost_dev_has_feature(vdev, VIRTIO_SCSI_F_HOTPLUG)) {
SPDK_WARNLOG("%s: 'Dev %u' is in use and hot-detach is not enabled for this controller.\n",
svdev->vdev.name, scsi_dev_num);
return -ENOTSUP;