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path: root/drivers/vhost/tcm_vhost.c
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Diffstat (limited to 'drivers/vhost/tcm_vhost.c')
-rw-r--r--drivers/vhost/tcm_vhost.c55
1 files changed, 37 insertions, 18 deletions
diff --git a/drivers/vhost/tcm_vhost.c b/drivers/vhost/tcm_vhost.c
index 1677238..99d3480 100644
--- a/drivers/vhost/tcm_vhost.c
+++ b/drivers/vhost/tcm_vhost.c
@@ -74,13 +74,17 @@ enum {
#define VHOST_SCSI_MAX_VQ 128
#define VHOST_SCSI_MAX_EVENT 128
+struct vhost_scsi_virtqueue {
+ struct vhost_virtqueue vq;
+};
+
struct vhost_scsi {
/* Protected by vhost_scsi->dev.mutex */
struct tcm_vhost_tpg **vs_tpg;
char vs_vhost_wwpn[TRANSPORT_IQN_LEN];
struct vhost_dev dev;
- struct vhost_virtqueue vqs[VHOST_SCSI_MAX_VQ];
+ struct vhost_scsi_virtqueue vqs[VHOST_SCSI_MAX_VQ];
struct vhost_work vs_completion_work; /* cmd completion work item */
struct llist_head vs_completion_list; /* cmd completion queue */
@@ -366,7 +370,7 @@ static void tcm_vhost_free_evt(struct vhost_scsi *vs, struct tcm_vhost_evt *evt)
static struct tcm_vhost_evt *tcm_vhost_allocate_evt(struct vhost_scsi *vs,
u32 event, u32 reason)
{
- struct vhost_virtqueue *vq = &vs->vqs[VHOST_SCSI_VQ_EVT];
+ struct vhost_virtqueue *vq = &vs->vqs[VHOST_SCSI_VQ_EVT].vq;
struct tcm_vhost_evt *evt;
if (vs->vs_events_nr > VHOST_SCSI_MAX_EVENT) {
@@ -409,7 +413,7 @@ static void vhost_scsi_free_cmd(struct tcm_vhost_cmd *tv_cmd)
static void tcm_vhost_do_evt_work(struct vhost_scsi *vs,
struct tcm_vhost_evt *evt)
{
- struct vhost_virtqueue *vq = &vs->vqs[VHOST_SCSI_VQ_EVT];
+ struct vhost_virtqueue *vq = &vs->vqs[VHOST_SCSI_VQ_EVT].vq;
struct virtio_scsi_event *event = &evt->event;
struct virtio_scsi_event __user *eventp;
unsigned out, in;
@@ -460,7 +464,7 @@ static void tcm_vhost_evt_work(struct vhost_work *work)
{
struct vhost_scsi *vs = container_of(work, struct vhost_scsi,
vs_event_work);
- struct vhost_virtqueue *vq = &vs->vqs[VHOST_SCSI_VQ_EVT];
+ struct vhost_virtqueue *vq = &vs->vqs[VHOST_SCSI_VQ_EVT].vq;
struct tcm_vhost_evt *evt;
struct llist_node *llnode;
@@ -511,8 +515,10 @@ static void vhost_scsi_complete_cmd_work(struct vhost_work *work)
v_rsp.sense_len);
ret = copy_to_user(tv_cmd->tvc_resp, &v_rsp, sizeof(v_rsp));
if (likely(ret == 0)) {
+ struct vhost_scsi_virtqueue *q;
vhost_add_used(tv_cmd->tvc_vq, tv_cmd->tvc_vq_desc, 0);
- vq = tv_cmd->tvc_vq - vs->vqs;
+ q = container_of(tv_cmd->tvc_vq, struct vhost_scsi_virtqueue, vq);
+ vq = q - vs->vqs;
__set_bit(vq, signal);
} else
pr_err("Faulted on virtio_scsi_cmd_resp\n");
@@ -523,7 +529,7 @@ static void vhost_scsi_complete_cmd_work(struct vhost_work *work)
vq = -1;
while ((vq = find_next_bit(signal, VHOST_SCSI_MAX_VQ, vq + 1))
< VHOST_SCSI_MAX_VQ)
- vhost_signal(&vs->dev, &vs->vqs[vq]);
+ vhost_signal(&vs->dev, &vs->vqs[vq].vq);
}
static struct tcm_vhost_cmd *vhost_scsi_allocate_cmd(
@@ -938,7 +944,7 @@ static void vhost_scsi_handle_kick(struct vhost_work *work)
static void vhost_scsi_flush_vq(struct vhost_scsi *vs, int index)
{
- vhost_poll_flush(&vs->dev.vqs[index].poll);
+ vhost_poll_flush(&vs->vqs[index].vq.poll);
}
static void vhost_scsi_flush(struct vhost_scsi *vs)
@@ -975,7 +981,7 @@ static int vhost_scsi_set_endpoint(
/* Verify that ring has been setup correctly. */
for (index = 0; index < vs->dev.nvqs; ++index) {
/* Verify that ring has been setup correctly. */
- if (!vhost_vq_access_ok(&vs->vqs[index])) {
+ if (!vhost_vq_access_ok(&vs->vqs[index].vq)) {
ret = -EFAULT;
goto out;
}
@@ -1022,7 +1028,7 @@ static int vhost_scsi_set_endpoint(
memcpy(vs->vs_vhost_wwpn, t->vhost_wwpn,
sizeof(vs->vs_vhost_wwpn));
for (i = 0; i < VHOST_SCSI_MAX_VQ; i++) {
- vq = &vs->vqs[i];
+ vq = &vs->vqs[i].vq;
/* Flushing the vhost_work acts as synchronize_rcu */
mutex_lock(&vq->mutex);
rcu_assign_pointer(vq->private_data, vs_tpg);
@@ -1063,7 +1069,7 @@ static int vhost_scsi_clear_endpoint(
mutex_lock(&vs->dev.mutex);
/* Verify that ring has been setup correctly. */
for (index = 0; index < vs->dev.nvqs; ++index) {
- if (!vhost_vq_access_ok(&vs->vqs[index])) {
+ if (!vhost_vq_access_ok(&vs->vqs[index].vq)) {
ret = -EFAULT;
goto err_dev;
}
@@ -1103,7 +1109,7 @@ static int vhost_scsi_clear_endpoint(
}
if (match) {
for (i = 0; i < VHOST_SCSI_MAX_VQ; i++) {
- vq = &vs->vqs[i];
+ vq = &vs->vqs[i].vq;
/* Flushing the vhost_work acts as synchronize_rcu */
mutex_lock(&vq->mutex);
rcu_assign_pointer(vq->private_data, NULL);
@@ -1151,24 +1157,36 @@ static int vhost_scsi_set_features(struct vhost_scsi *vs, u64 features)
static int vhost_scsi_open(struct inode *inode, struct file *f)
{
struct vhost_scsi *s;
+ struct vhost_virtqueue **vqs;
int r, i;
s = kzalloc(sizeof(*s), GFP_KERNEL);
if (!s)
return -ENOMEM;
+ vqs = kmalloc(VHOST_SCSI_MAX_VQ * sizeof(*vqs), GFP_KERNEL);
+ if (!vqs) {
+ kfree(s);
+ return -ENOMEM;
+ }
+
vhost_work_init(&s->vs_completion_work, vhost_scsi_complete_cmd_work);
vhost_work_init(&s->vs_event_work, tcm_vhost_evt_work);
s->vs_events_nr = 0;
s->vs_events_missed = false;
- s->vqs[VHOST_SCSI_VQ_CTL].handle_kick = vhost_scsi_ctl_handle_kick;
- s->vqs[VHOST_SCSI_VQ_EVT].handle_kick = vhost_scsi_evt_handle_kick;
- for (i = VHOST_SCSI_VQ_IO; i < VHOST_SCSI_MAX_VQ; i++)
- s->vqs[i].handle_kick = vhost_scsi_handle_kick;
- r = vhost_dev_init(&s->dev, s->vqs, VHOST_SCSI_MAX_VQ);
+ vqs[VHOST_SCSI_VQ_CTL] = &s->vqs[VHOST_SCSI_VQ_CTL].vq;
+ vqs[VHOST_SCSI_VQ_EVT] = &s->vqs[VHOST_SCSI_VQ_EVT].vq;
+ s->vqs[VHOST_SCSI_VQ_CTL].vq.handle_kick = vhost_scsi_ctl_handle_kick;
+ s->vqs[VHOST_SCSI_VQ_EVT].vq.handle_kick = vhost_scsi_evt_handle_kick;
+ for (i = VHOST_SCSI_VQ_IO; i < VHOST_SCSI_MAX_VQ; i++) {
+ vqs[i] = &s->vqs[i].vq;
+ s->vqs[i].vq.handle_kick = vhost_scsi_handle_kick;
+ }
+ r = vhost_dev_init(&s->dev, vqs, VHOST_SCSI_MAX_VQ);
if (r < 0) {
+ kfree(vqs);
kfree(s);
return r;
}
@@ -1190,6 +1208,7 @@ static int vhost_scsi_release(struct inode *inode, struct file *f)
vhost_dev_cleanup(&s->dev, false);
/* Jobs can re-queue themselves in evt kick handler. Do extra flush. */
vhost_scsi_flush(s);
+ kfree(s->dev.vqs);
kfree(s);
return 0;
}
@@ -1205,7 +1224,7 @@ static long vhost_scsi_ioctl(struct file *f, unsigned int ioctl,
u32 events_missed;
u64 features;
int r, abi_version = VHOST_SCSI_ABI_VERSION;
- struct vhost_virtqueue *vq = &vs->vqs[VHOST_SCSI_VQ_EVT];
+ struct vhost_virtqueue *vq = &vs->vqs[VHOST_SCSI_VQ_EVT].vq;
switch (ioctl) {
case VHOST_SCSI_SET_ENDPOINT:
@@ -1333,7 +1352,7 @@ static void tcm_vhost_do_plug(struct tcm_vhost_tpg *tpg,
else
reason = VIRTIO_SCSI_EVT_RESET_REMOVED;
- vq = &vs->vqs[VHOST_SCSI_VQ_EVT];
+ vq = &vs->vqs[VHOST_SCSI_VQ_EVT].vq;
mutex_lock(&vq->mutex);
tcm_vhost_send_evt(vs, tpg, lun,
VIRTIO_SCSI_T_TRANSPORT_RESET, reason);
generated by cgit v1.1 at 2024-12-23 23:17:55 +0000