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vhost: move vid to session struct

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Each connection is created with the `new_connection`
rte_vhost callback with a unique vid parameter. Storing
the vid inside the device struct was sufficient until
we wanted to have multiple connections per device.

Change-Id: Ic730d3377e1410499bdc163ce961863c530b880d
Signed-off-by: Darek Stojaczyk <dariusz.stojaczyk@intel.com>
Reviewed-on: https://review.gerrithub.io/437775
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Chandler-Test-Pool: SPDK Automated Test System <sys_sgsw@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
This commit is contained in:
Darek Stojaczyk 2018-12-13 13:07:11 +01:00 committed by Jim Harris
parent 73844cccf4
commit edaea9164d
4 changed files with 54 additions and 50 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

76
lib/vhost/vhost.c
View File

@ -108,7 +108,6 @@ static void
spdk_vhost_log_req_desc(struct spdk_vhost_session *vsession, struct spdk_vhost_virtqueue *virtqueue,
uint16_t req_id)
{
struct spdk_vhost_dev *vdev = vsession->vdev;
struct vring_desc *desc, *desc_table;
uint32_t desc_table_size;
int rc;
@ -129,7 +128,7 @@ spdk_vhost_log_req_desc(struct spdk_vhost_session *vsession, struct spdk_vhost_v
* doing so would require tracking those changes in each backed.
* Also backend most likely will touch all/most of those pages so
* for lets assume we touched all pages passed to as writeable buffers. */
rte_vhost_log_write(vdev->vid, desc->addr, desc->len);
rte_vhost_log_write(vsession->vid, desc->addr, desc->len);
}
spdk_vhost_vring_desc_get_next(&desc, desc_table, desc_table_size);
} while (desc);
@ -140,7 +139,6 @@ spdk_vhost_log_used_vring_elem(struct spdk_vhost_session *vsession,
struct spdk_vhost_virtqueue *virtqueue,
uint16_t idx)
{
struct spdk_vhost_dev *vdev = vsession->vdev;
uint64_t offset, len;
uint16_t vq_idx;
@ -152,14 +150,13 @@ spdk_vhost_log_used_vring_elem(struct spdk_vhost_session *vsession,
len = sizeof(virtqueue->vring.used->ring[idx]);
vq_idx = virtqueue - vsession->virtqueue;
rte_vhost_log_used_vring(vdev->vid, vq_idx, offset, len);
rte_vhost_log_used_vring(vsession->vid, vq_idx, offset, len);
}
static void
spdk_vhost_log_used_vring_idx(struct spdk_vhost_session *vsession,
struct spdk_vhost_virtqueue *virtqueue)
{
struct spdk_vhost_dev *vdev = vsession->vdev;
uint64_t offset, len;
uint16_t vq_idx;
@ -171,7 +168,7 @@ spdk_vhost_log_used_vring_idx(struct spdk_vhost_session *vsession,
len = sizeof(virtqueue->vring.used->idx);
vq_idx = virtqueue - vsession->virtqueue;
rte_vhost_log_used_vring(vdev->vid, vq_idx, offset, len);
rte_vhost_log_used_vring(vsession->vid, vq_idx, offset, len);
}
/*
@ -513,14 +510,14 @@ spdk_vhost_dev_find_by_id(unsigned id)
return NULL;
}
static struct spdk_vhost_dev *
spdk_vhost_dev_find_by_vid(int vid)
static struct spdk_vhost_session *
spdk_vhost_session_find_by_vid(int vid)
{
struct spdk_vhost_dev *vdev;
TAILQ_FOREACH(vdev, &g_spdk_vhost_devices, tailq) {
if (vdev->vid == vid) {
return vdev;
if (vdev->session.vid == vid) {
return &vdev->session;
}
}
@ -753,7 +750,7 @@ spdk_vhost_dev_register(struct spdk_vhost_dev *vdev, const char *name, const cha
vdev->name = strdup(name);
vdev->path = strdup(path);
vdev->id = ctrlr_num++;
vdev->vid = -1;
vdev->session.vid = -1;
vdev->lcore = -1;
vdev->cpumask = cpumask;
vdev->registered = true;
@ -778,7 +775,7 @@ out:
int
spdk_vhost_dev_unregister(struct spdk_vhost_dev *vdev)
{
if (vdev->vid != -1) {
if (vdev->session.vid != -1) {
SPDK_ERRLOG("Controller %s has still valid connection.\n", vdev->name);
return -EBUSY;
}
@ -1030,13 +1027,14 @@ stop_device(int vid)
uint16_t i;
pthread_mutex_lock(&g_spdk_vhost_mutex);
vdev = spdk_vhost_dev_find_by_vid(vid);
if (vdev == NULL) {
SPDK_ERRLOG("Couldn't find device with vid %d to stop.\n", vid);
vsession = spdk_vhost_session_find_by_vid(vid);
if (vsession == NULL) {
SPDK_ERRLOG("Couldn't find session with vid %d.\n", vid);
pthread_mutex_unlock(&g_spdk_vhost_mutex);
return;
}
vdev = vsession->vdev;
if (vdev->lcore == -1) {
SPDK_ERRLOG("Controller %s is not loaded.\n", vdev->name);
pthread_mutex_unlock(&g_spdk_vhost_mutex);
@ -1050,13 +1048,12 @@ stop_device(int vid)
return;
}
vsession = &vdev->session;
for (i = 0; i < vsession->max_queues; i++) {
q = &vsession->virtqueue[i].vring;
if (q->desc == NULL) {
continue;
}
rte_vhost_set_vhost_vring_last_idx(vdev->vid, i, q->last_avail_idx, q->last_used_idx);
rte_vhost_set_vhost_vring_last_idx(vsession->vid, i, q->last_avail_idx, q->last_used_idx);
}
spdk_vhost_session_mem_unregister(vsession);
@ -1076,19 +1073,18 @@ start_device(int vid)
pthread_mutex_lock(&g_spdk_vhost_mutex);
vdev = spdk_vhost_dev_find_by_vid(vid);
if (vdev == NULL) {
SPDK_ERRLOG("Controller with vid %d doesn't exist.\n", vid);
vsession = spdk_vhost_session_find_by_vid(vid);
if (vsession == NULL) {
SPDK_ERRLOG("Couldn't find session with vid %d.\n", vid);
goto out;
}
vdev = vsession->vdev;
if (vdev->lcore != -1) {
SPDK_ERRLOG("Controller %s already loaded.\n", vdev->name);
goto out;
}
vsession = &vdev->session;
vsession->max_queues = 0;
memset(vsession->virtqueue, 0, sizeof(vsession->virtqueue));
for (i = 0; i < SPDK_VHOST_MAX_VQUEUES; i++) {
@ -1153,16 +1149,18 @@ out:
static int
get_config(int vid, uint8_t *config, uint32_t len)
{
struct spdk_vhost_session *vsession;
struct spdk_vhost_dev *vdev;
int rc = -1;
pthread_mutex_lock(&g_spdk_vhost_mutex);
vdev = spdk_vhost_dev_find_by_vid(vid);
if (vdev == NULL) {
SPDK_ERRLOG("Controller with vid %d doesn't exist.\n", vid);
vsession = spdk_vhost_session_find_by_vid(vid);
if (vsession == NULL) {
SPDK_ERRLOG("Couldn't find session with vid %d.\n", vid);
goto out;
}
vdev = vsession->vdev;
if (vdev->backend->vhost_get_config) {
rc = vdev->backend->vhost_get_config(vdev, config, len);
}
@ -1175,16 +1173,18 @@ out:
static int
set_config(int vid, uint8_t *config, uint32_t offset, uint32_t size, uint32_t flags)
{
struct spdk_vhost_session *vsession;
struct spdk_vhost_dev *vdev;
int rc = -1;
pthread_mutex_lock(&g_spdk_vhost_mutex);
vdev = spdk_vhost_dev_find_by_vid(vid);
if (vdev == NULL) {
SPDK_ERRLOG("Controller with vid %d doesn't exist.\n", vid);
vsession = spdk_vhost_session_find_by_vid(vid);
if (vsession == NULL) {
SPDK_ERRLOG("Couldn't find session with vid %d.\n", vid);
goto out;
}
vdev = vsession->vdev;
if (vdev->backend->vhost_set_config) {
rc = vdev->backend->vhost_set_config(vdev, config, offset, size, flags);
}
@ -1250,6 +1250,7 @@ static int
new_connection(int vid)
{
struct spdk_vhost_dev *vdev;
struct spdk_vhost_session *vsession;
char ifname[PATH_MAX];
pthread_mutex_lock(&g_spdk_vhost_mutex);
@ -1267,14 +1268,15 @@ new_connection(int vid)
}
/* since pollers are not running it safe not to use spdk_event here */
if (vdev->vid != -1) {
SPDK_ERRLOG("Device with vid %d is already connected.\n", vid);
vsession = &vdev->session;
if (vsession->vid != -1) {
SPDK_ERRLOG("Session with vid %d already exists.\n", vid);
pthread_mutex_unlock(&g_spdk_vhost_mutex);
return -1;
}
vdev->vid = vid;
vdev->session.vdev = vdev;
vsession->vdev = vdev;
vsession->vid = vid;
pthread_mutex_unlock(&g_spdk_vhost_mutex);
return 0;
}
@ -1282,18 +1284,18 @@ new_connection(int vid)
static void
destroy_connection(int vid)
{
struct spdk_vhost_dev *vdev;
struct spdk_vhost_session *vsession;
pthread_mutex_lock(&g_spdk_vhost_mutex);
vdev = spdk_vhost_dev_find_by_vid(vid);
if (vdev == NULL) {
SPDK_ERRLOG("Couldn't find device with vid %d to destroy connection for.\n", vid);
vsession = spdk_vhost_session_find_by_vid(vid);
if (vsession == NULL) {
SPDK_ERRLOG("Couldn't find session with vid %d.\n", vid);
pthread_mutex_unlock(&g_spdk_vhost_mutex);
return;
}
/* since pollers are not running it safe not to use spdk_event here */
vdev->vid = -1;
vsession->vid = -1;
pthread_mutex_unlock(&g_spdk_vhost_mutex);
}

5
lib/vhost/vhost_internal.h
View File

@ -140,8 +140,6 @@ struct spdk_vhost_dev {
/* Unique device ID. */
unsigned id;
/* rte_vhost device ID. */
int vid;
int32_t lcore;
struct spdk_cpuset *cpumask;
bool registered;
@ -169,6 +167,9 @@ struct spdk_vhost_dev {
struct spdk_vhost_session {
struct spdk_vhost_dev *vdev;
/* rte_vhost connection ID. */
int vid;
struct rte_vhost_memory *mem;
int task_cnt;

6
lib/vhost/vhost_nvme.c
View File

@ -893,7 +893,7 @@ spdk_vhost_nvme_get_by_name(int vid)
struct spdk_vhost_nvme_dev *nvme;
TAILQ_FOREACH(nvme, &g_nvme_ctrlrs, tailq) {
if (nvme->vdev.vid == vid) {
if (nvme->vdev.session.vid == vid) {
return nvme;
}
}
@ -1084,7 +1084,7 @@ spdk_vhost_nvme_start_device(struct spdk_vhost_dev *vdev, void *event_ctx)
return -1;
}
SPDK_NOTICELOG("Start Device %u, Path %s, lcore %d\n", vdev->vid,
SPDK_NOTICELOG("Start Device %u, Path %s, lcore %d\n", vdev->session.vid,
vdev->path, vdev->lcore);
for (i = 0; i < nvme->num_ns; i++) {
@ -1171,7 +1171,7 @@ spdk_vhost_nvme_stop_device(struct spdk_vhost_dev *vdev, void *event_ctx)
}
free_task_pool(nvme);
SPDK_NOTICELOG("Stopping Device %u, Path %s\n", vdev->vid, vdev->path);
SPDK_NOTICELOG("Stopping Device %u, Path %s\n", vdev->session.vid, vdev->path);
nvme->destroy_ctx.event_ctx = event_ctx;
spdk_poller_unregister(&nvme->requestq_poller);

17
test/unit/lib/vhost/vhost.c/vhost_ut.c
View File

@ -163,8 +163,8 @@ start_vdev(struct spdk_vhost_dev *vdev)
mem->regions[1].size = 0x400000; /* 4 MB */
mem->regions[1].host_user_addr = 0x2000000;
vdev->vid = 0;
vdev->lcore = 0;
vdev->session.vid = 0;
vdev->session.mem = mem;
}
@ -173,7 +173,7 @@ stop_vdev(struct spdk_vhost_dev *vdev)
{
free(vdev->session.mem);
vdev->session.mem = NULL;
vdev->vid = -1;
vdev->session.vid = -1;
}
static void
@ -302,19 +302,20 @@ create_controller_test(void)
}
static void
dev_find_by_vid_test(void)
session_find_by_vid_test(void)
{
struct spdk_vhost_dev *vdev, *tmp;
struct spdk_vhost_dev *vdev;
struct spdk_vhost_session *tmp;
int rc;
rc = alloc_vdev(&vdev, "vdev_name_0", "0x1");
SPDK_CU_ASSERT_FATAL(rc == 0 && vdev);
tmp = spdk_vhost_dev_find_by_vid(vdev->vid);
CU_ASSERT(tmp == vdev);
tmp = spdk_vhost_session_find_by_vid(vdev->session.vid);
CU_ASSERT(tmp == &vdev->session);
/* Search for a device with incorrect vid */
tmp = spdk_vhost_dev_find_by_vid(vdev->vid + 0xFF);
tmp = spdk_vhost_session_find_by_vid(vdev->session.vid + 0xFF);
CU_ASSERT(tmp == NULL);
cleanup_vdev(vdev);
@ -356,7 +357,7 @@ main(int argc, char **argv)
if (
CU_add_test(suite, "desc_to_iov", desc_to_iov_test) == NULL ||
CU_add_test(suite, "create_controller", create_controller_test) == NULL ||
CU_add_test(suite, "dev_find_by_vid", dev_find_by_vid_test) == NULL ||
CU_add_test(suite, "session_find_by_vid", session_find_by_vid_test) == NULL ||
CU_add_test(suite, "remove_controller", remove_controller_test) == NULL
) {
CU_cleanup_registry();