#include <rte_log.h>
#include <rte_string_fns.h>
#include <rte_memory.h>
+#include <rte_virtio_net.h>
-#include "main.h"
-#include "virtio-net.h"
#include "vhost-net-cdev.h"
#include "eventfd_link/eventfd_link.h"
-/**
+/*
* Device linked list structure for configuration.
*/
struct virtio_net_config_ll {
- struct virtio_net dev; /* Virtio device. */
- struct virtio_net_config_ll *next; /* Next entry on linked list. */
+ struct virtio_net dev; /* Virtio device.*/
+ struct virtio_net_config_ll *next; /* Next dev on linked list.*/
};
const char eventfd_cdev[] = "/dev/eventfd-link";
-/* device ops to add/remove device to data core. */
-static struct virtio_net_device_ops const * notify_ops;
-/* Root address of the linked list in the configuration core. */
-static struct virtio_net_config_ll *ll_root = NULL;
+/* device ops to add/remove device to/from data core. */
+static struct virtio_net_device_ops const *notify_ops;
+/* root address of the linked list of managed virtio devices */
+static struct virtio_net_config_ll *ll_root;
-/* Features supported by this application. RX merge buffers are enabled by default. */
-#define VHOST_SUPPORTED_FEATURES (1ULL << VIRTIO_NET_F_MRG_RXBUF)
+/* Features supported by this lib. */
+#define VHOST_SUPPORTED_FEATURES ((1ULL << VIRTIO_NET_F_MRG_RXBUF) | \
+ (1ULL << VIRTIO_NET_F_CTRL_RX))
static uint64_t VHOST_FEATURES = VHOST_SUPPORTED_FEATURES;
/* Line size for reading maps file. */
-const uint32_t BUFSIZE = PATH_MAX;
+static const uint32_t BUFSIZE = PATH_MAX;
/* Size of prot char array in procmap. */
#define PROT_SZ 5
#define PROCMAP_SZ 8
/* Structure containing information gathered from maps file. */
-struct procmap
-{
- uint64_t va_start; /* Start virtual address in file. */
- uint64_t len; /* Size of file. */
- uint64_t pgoff; /* Not used. */
- uint32_t maj; /* Not used. */
- uint32_t min; /* Not used. */
- uint32_t ino; /* Not used. */
- char prot[PROT_SZ]; /* Not used. */
- char fname[PATH_MAX]; /* File name. */
+struct procmap {
+ uint64_t va_start; /* Start virtual address in file. */
+ uint64_t len; /* Size of file. */
+ uint64_t pgoff; /* Not used. */
+ uint32_t maj; /* Not used. */
+ uint32_t min; /* Not used. */
+ uint32_t ino; /* Not used. */
+ char prot[PROT_SZ]; /* Not used. */
+ char fname[PATH_MAX]; /* File name. */
};
/*
- * Converts QEMU virtual address to Vhost virtual address. This function is used
- * to convert the ring addresses to our address space.
+ * Converts QEMU virtual address to Vhost virtual address. This function is
+ * used to convert the ring addresses to our address space.
*/
static uint64_t
qva_to_vva(struct virtio_net *dev, uint64_t qemu_va)
for (regionidx = 0; regionidx < dev->mem->nregions; regionidx++) {
region = &dev->mem->regions[regionidx];
if ((qemu_va >= region->userspace_address) &&
- (qemu_va <= region->userspace_address +
- region->memory_size)) {
- vhost_va = dev->mem->mapped_address + qemu_va - dev->mem->base_address;
+ (qemu_va <= region->userspace_address +
+ region->memory_size)) {
+ vhost_va = dev->mem->mapped_address + qemu_va -
+ dev->mem->base_address;
break;
}
}
}
/*
- * Locate the file containing QEMU's memory space and map it to our address space.
+ * Locate the file containing QEMU's memory space and
+ * map it to our address space.
*/
static int
-host_memory_map (struct virtio_net *dev, struct virtio_memory *mem, pid_t pid, uint64_t addr)
+host_memory_map(struct virtio_net *dev, struct virtio_memory *mem,
+ pid_t pid, uint64_t addr)
{
struct dirent *dptr = NULL;
struct procmap procmap;
char mapfile[PATH_MAX];
char procdir[PATH_MAX];
char resolved_path[PATH_MAX];
- FILE *fmap;
- void *map;
- uint8_t found = 0;
- char line[BUFSIZE];
+ char *path = NULL;
+ FILE *fmap;
+ void *map;
+ uint8_t found = 0;
+ char line[BUFSIZE];
char dlm[] = "- : ";
char *str, *sp, *in[PROCMAP_SZ];
char *end = NULL;
/* Path where mem files are located. */
- snprintf (procdir, PATH_MAX, "/proc/%u/fd/", pid);
+ snprintf(procdir, PATH_MAX, "/proc/%u/fd/", pid);
/* Maps file used to locate mem file. */
- snprintf (mapfile, PATH_MAX, "/proc/%u/maps", pid);
+ snprintf(mapfile, PATH_MAX, "/proc/%u/maps", pid);
fmap = fopen(mapfile, "r");
if (fmap == NULL) {
- RTE_LOG(ERR, VHOST_CONFIG, "(%"PRIu64") Failed to open maps file for pid %d\n", dev->device_fh, pid);
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "(%"PRIu64") Failed to open maps file for pid %d\n",
+ dev->device_fh, pid);
return -1;
}
while (fgets(line, BUFSIZE, fmap) != 0) {
str = line;
errno = 0;
- /* Split line in to fields. */
+ /* Split line into fields. */
for (i = 0; i < PROCMAP_SZ; i++) {
- if (((in[i] = strtok_r(str, &dlm[i], &sp)) == NULL) || (errno != 0)) {
+ in[i] = strtok_r(str, &dlm[i], &sp);
+ if ((in[i] == NULL) || (errno != 0)) {
fclose(fmap);
return -1;
}
/* Convert/Copy each field as needed. */
procmap.va_start = strtoull(in[0], &end, 16);
- if ((in[0] == '\0') || (end == NULL) || (*end != '\0') || (errno != 0)) {
+ if ((in[0] == '\0') || (end == NULL) || (*end != '\0') ||
+ (errno != 0)) {
fclose(fmap);
return -1;
}
procmap.len = strtoull(in[1], &end, 16);
- if ((in[1] == '\0') || (end == NULL) || (*end != '\0') || (errno != 0)) {
+ if ((in[1] == '\0') || (end == NULL) || (*end != '\0') ||
+ (errno != 0)) {
fclose(fmap);
return -1;
}
procmap.pgoff = strtoull(in[3], &end, 16);
- if ((in[3] == '\0') || (end == NULL) || (*end != '\0') || (errno != 0)) {
+ if ((in[3] == '\0') || (end == NULL) || (*end != '\0') ||
+ (errno != 0)) {
fclose(fmap);
return -1;
}
procmap.maj = strtoul(in[4], &end, 16);
- if ((in[4] == '\0') || (end == NULL) || (*end != '\0') || (errno != 0)) {
+ if ((in[4] == '\0') || (end == NULL) || (*end != '\0') ||
+ (errno != 0)) {
fclose(fmap);
return -1;
}
procmap.min = strtoul(in[5], &end, 16);
- if ((in[5] == '\0') || (end == NULL) || (*end != '\0') || (errno != 0)) {
+ if ((in[5] == '\0') || (end == NULL) || (*end != '\0') ||
+ (errno != 0)) {
fclose(fmap);
return -1;
}
procmap.ino = strtoul(in[6], &end, 16);
- if ((in[6] == '\0') || (end == NULL) || (*end != '\0') || (errno != 0)) {
+ if ((in[6] == '\0') || (end == NULL) || (*end != '\0') ||
+ (errno != 0)) {
fclose(fmap);
return -1;
}
fclose(fmap);
if (!found) {
- RTE_LOG(ERR, VHOST_CONFIG, "(%"PRIu64") Failed to find memory file in pid %d maps file\n", dev->device_fh, pid);
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "(%"PRIu64") Failed to find memory file in pid %d maps file\n",
+ dev->device_fh, pid);
return -1;
}
/* Find the guest memory file among the process fds. */
dp = opendir(procdir);
if (dp == NULL) {
- RTE_LOG(ERR, VHOST_CONFIG, "(%"PRIu64") Cannot open pid %d process directory \n", dev->device_fh, pid);
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "(%"PRIu64") Cannot open pid %d process directory\n",
+ dev->device_fh, pid);
return -1;
-
}
found = 0;
/* Read the fd directory contents. */
while (NULL != (dptr = readdir(dp))) {
- snprintf (memfile, PATH_MAX, "/proc/%u/fd/%s", pid, dptr->d_name);
- realpath(memfile, resolved_path);
- if (resolved_path == NULL) {
- RTE_LOG(ERR, VHOST_CONFIG, "(%"PRIu64") Failed to resolve fd directory\n", dev->device_fh);
+ snprintf(memfile, PATH_MAX, "/proc/%u/fd/%s",
+ pid, dptr->d_name);
+ path = realpath(memfile, resolved_path);
+ if ((path == NULL) && (strlen(resolved_path) == 0)) {
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "(%"PRIu64") Failed to resolve fd directory\n",
+ dev->device_fh);
closedir(dp);
return -1;
}
closedir(dp);
if (found == 0) {
- RTE_LOG(ERR, VHOST_CONFIG, "(%"PRIu64") Failed to find memory file for pid %d\n", dev->device_fh, pid);
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "(%"PRIu64") Failed to find memory file for pid %d\n",
+ dev->device_fh, pid);
return -1;
}
/* Open the shared memory file and map the memory into this process. */
fd = open(memfile, O_RDWR);
if (fd == -1) {
- RTE_LOG(ERR, VHOST_CONFIG, "(%"PRIu64") Failed to open %s for pid %d\n", dev->device_fh, memfile, pid);
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "(%"PRIu64") Failed to open %s for pid %d\n",
+ dev->device_fh, memfile, pid);
return -1;
}
- map = mmap(0, (size_t)procmap.len, PROT_READ|PROT_WRITE , MAP_POPULATE|MAP_SHARED, fd, 0);
- close (fd);
+ map = mmap(0, (size_t)procmap.len, PROT_READ|PROT_WRITE,
+ MAP_POPULATE|MAP_SHARED, fd, 0);
+ close(fd);
if (map == MAP_FAILED) {
- RTE_LOG(ERR, VHOST_CONFIG, "(%"PRIu64") Error mapping the file %s for pid %d\n", dev->device_fh, memfile, pid);
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "(%"PRIu64") Error mapping the file %s for pid %d\n",
+ dev->device_fh, memfile, pid);
return -1;
}
mem->mapped_address = (uint64_t)(uintptr_t)map;
mem->mapped_size = procmap.len;
- LOG_DEBUG(VHOST_CONFIG, "(%"PRIu64") Mem File: %s->%s - Size: %llu - VA: %p\n", dev->device_fh,
- memfile, resolved_path, (long long unsigned)mem->mapped_size, map);
+ LOG_DEBUG(VHOST_CONFIG,
+ "(%"PRIu64") Mem File: %s->%s - Size: %llu - VA: %p\n",
+ dev->device_fh,
+ memfile, resolved_path,
+ (unsigned long long)mem->mapped_size, map);
return 0;
}
}
/*
- * Searches the configuration core linked list and retrieves the device if it exists.
+ * Searches the configuration core linked list and
+ * retrieves the device if it exists.
*/
static struct virtio_net *
get_device(struct vhost_device_ctx ctx)
ll_dev = get_config_ll_entry(ctx);
- /* If a matching entry is found in the linked list, return the device in that entry. */
- if (ll_dev) {
+ if (ll_dev)
return &ll_dev->dev;
- }
- RTE_LOG(ERR, VHOST_CONFIG, "(%"PRIu64") Device not found in linked list.\n", ctx.fh);
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "(%"PRIu64") Device not found in linked list.\n", ctx.fh);
return NULL;
}
/* If ll_dev == NULL then this is the first device so go to else */
if (ll_dev) {
/* If the 1st device_fh != 0 then we insert our device here. */
- if (ll_dev->dev.device_fh != 0) {
+ if (ll_dev->dev.device_fh != 0) {
new_ll_dev->dev.device_fh = 0;
new_ll_dev->next = ll_dev;
ll_root = new_ll_dev;
} else {
- /* Increment through the ll until we find un unused device_fh. Insert the device at that entry*/
- while ((ll_dev->next != NULL) && (ll_dev->dev.device_fh == (ll_dev->next->dev.device_fh - 1)))
+ /*
+ * Increment through the ll until we find un unused
+ * device_fh. Insert the device at that entry.
+ */
+ while ((ll_dev->next != NULL) &&
+ (ll_dev->dev.device_fh ==
+ (ll_dev->next->dev.device_fh - 1)))
ll_dev = ll_dev->next;
new_ll_dev->dev.device_fh = ll_dev->dev.device_fh + 1;
}
/*
- * Unmap any memory, close any file descriptors and free any memory owned by a device.
+ * Unmap any memory, close any file descriptors and
+ * free any memory owned by a device.
*/
static void
cleanup_device(struct virtio_net *dev)
{
/* Unmap QEMU memory file if mapped. */
if (dev->mem) {
- munmap((void*)(uintptr_t)dev->mem->mapped_address, (size_t)dev->mem->mapped_size);
+ munmap((void *)(uintptr_t)dev->mem->mapped_address,
+ (size_t)dev->mem->mapped_size);
free(dev->mem);
}
free(ll_dev->dev.virtqueue[VIRTIO_TXQ]);
free(ll_dev);
}
+
/*
* Remove an entry from the device configuration linked list.
*/
static struct virtio_net_config_ll *
-rm_config_ll_entry(struct virtio_net_config_ll *ll_dev, struct virtio_net_config_ll *ll_dev_last)
+rm_config_ll_entry(struct virtio_net_config_ll *ll_dev,
+ struct virtio_net_config_ll *ll_dev_last)
{
/* First remove the device and then clean it up. */
if (ll_dev == ll_root) {
} else {
cleanup_device(&ll_dev->dev);
free_device(ll_dev);
- RTE_LOG(ERR, VHOST_CONFIG, "Remove entry from config_ll failed\n");
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "Remove entry from config_ll failed\n");
return NULL;
}
}
{
uint64_t vq_offset;
- /* Virtqueues have already been malloced so we don't want to set them to NULL. */
+ /*
+ * Virtqueues have already been malloced so
+ * we don't want to set them to NULL.
+ */
vq_offset = offsetof(struct virtio_net, mem);
/* Set everything to 0. */
- memset((void*)(uintptr_t)((uint64_t)(uintptr_t)dev + vq_offset), 0,
+ memset((void *)(uintptr_t)((uint64_t)(uintptr_t)dev + vq_offset), 0,
(sizeof(struct virtio_net) - (size_t)vq_offset));
memset(dev->virtqueue[VIRTIO_RXQ], 0, sizeof(struct vhost_virtqueue));
memset(dev->virtqueue[VIRTIO_TXQ], 0, sizeof(struct vhost_virtqueue));
/* Setup device and virtqueues. */
new_ll_dev = malloc(sizeof(struct virtio_net_config_ll));
if (new_ll_dev == NULL) {
- RTE_LOG(ERR, VHOST_CONFIG, "(%"PRIu64") Failed to allocate memory for dev.\n", ctx.fh);
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "(%"PRIu64") Failed to allocate memory for dev.\n",
+ ctx.fh);
return -1;
}
virtqueue_rx = malloc(sizeof(struct vhost_virtqueue));
if (virtqueue_rx == NULL) {
free(new_ll_dev);
- RTE_LOG(ERR, VHOST_CONFIG, "(%"PRIu64") Failed to allocate memory for virtqueue_rx.\n", ctx.fh);
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "(%"PRIu64") Failed to allocate memory for rxq.\n",
+ ctx.fh);
return -1;
}
if (virtqueue_tx == NULL) {
free(virtqueue_rx);
free(new_ll_dev);
- RTE_LOG(ERR, VHOST_CONFIG, "(%"PRIu64") Failed to allocate memory for virtqueue_tx.\n", ctx.fh);
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "(%"PRIu64") Failed to allocate memory for txq.\n",
+ ctx.fh);
return -1;
}
}
/*
- * Function is called from the CUSE release function. This function will cleanup
- * the device and remove it from device configuration linked list.
+ * Function is called from the CUSE release function. This function will
+ * cleanup the device and remove it from device configuration linked list.
*/
static void
destroy_device(struct vhost_device_ctx ctx)
/* Find the linked list entry for the device to be removed. */
ll_dev_cur_ctx = get_config_ll_entry(ctx);
while (ll_dev_cur != NULL) {
- /* If the device is found or a device that doesn't exist is found then it is removed. */
+ /*
+ * If the device is found or
+ * a device that doesn't exist is found then it is removed.
+ */
if (ll_dev_cur == ll_dev_cur_ctx) {
/*
- * If the device is running on a data core then call the function to remove it from
- * the data core.
+ * If the device is running on a data core then call
+ * the function to remove it from the data core.
*/
if ((ll_dev_cur->dev.flags & VIRTIO_DEV_RUNNING))
notify_ops->destroy_device(&(ll_dev_cur->dev));
- ll_dev_cur = rm_config_ll_entry(ll_dev_cur, ll_dev_last);
+ ll_dev_cur = rm_config_ll_entry(ll_dev_cur,
+ ll_dev_last);
} else {
ll_dev_last = ll_dev_cur;
ll_dev_cur = ll_dev_cur->next;
/*
* Called from CUSE IOCTL: VHOST_SET_OWNER
- * This function just returns success at the moment unless the device hasn't been initialised.
+ * This function just returns success at the moment unless
+ * the device hasn't been initialised.
*/
static int
set_owner(struct vhost_device_ctx ctx)
/*
* Called from CUSE IOCTL: VHOST_SET_FEATURES
- * We receive the negotiated set of features supported by us and the virtio device.
+ * We receive the negotiated features supported by us and the virtio device.
*/
static int
set_features(struct vhost_device_ctx ctx, uint64_t *pu)
/* Set the vhost_hlen depending on if VIRTIO_NET_F_MRG_RXBUF is set. */
if (dev->features & (1 << VIRTIO_NET_F_MRG_RXBUF)) {
- LOG_DEBUG(VHOST_CONFIG, "(%"PRIu64") Mergeable RX buffers enabled\n", dev->device_fh);
- dev->virtqueue[VIRTIO_RXQ]->vhost_hlen = sizeof(struct virtio_net_hdr_mrg_rxbuf);
- dev->virtqueue[VIRTIO_TXQ]->vhost_hlen = sizeof(struct virtio_net_hdr_mrg_rxbuf);
+ LOG_DEBUG(VHOST_CONFIG,
+ "(%"PRIu64") Mergeable RX buffers enabled\n",
+ dev->device_fh);
+ dev->virtqueue[VIRTIO_RXQ]->vhost_hlen =
+ sizeof(struct virtio_net_hdr_mrg_rxbuf);
+ dev->virtqueue[VIRTIO_TXQ]->vhost_hlen =
+ sizeof(struct virtio_net_hdr_mrg_rxbuf);
} else {
- LOG_DEBUG(VHOST_CONFIG, "(%"PRIu64") Mergeable RX buffers disabled\n", dev->device_fh);
- dev->virtqueue[VIRTIO_RXQ]->vhost_hlen = sizeof(struct virtio_net_hdr);
- dev->virtqueue[VIRTIO_TXQ]->vhost_hlen = sizeof(struct virtio_net_hdr);
+ LOG_DEBUG(VHOST_CONFIG,
+ "(%"PRIu64") Mergeable RX buffers disabled\n",
+ dev->device_fh);
+ dev->virtqueue[VIRTIO_RXQ]->vhost_hlen =
+ sizeof(struct virtio_net_hdr);
+ dev->virtqueue[VIRTIO_TXQ]->vhost_hlen =
+ sizeof(struct virtio_net_hdr);
}
return 0;
}
/*
* Called from CUSE IOCTL: VHOST_SET_MEM_TABLE
- * This function creates and populates the memory structure for the device. This includes
- * storing offsets used to translate buffer addresses.
+ * This function creates and populates the memory structure for the device.
+ * This includes storing offsets used to translate buffer addresses.
*/
static int
-set_mem_table(struct vhost_device_ctx ctx, const void *mem_regions_addr, uint32_t nregions)
+set_mem_table(struct vhost_device_ctx ctx, const void *mem_regions_addr,
+ uint32_t nregions)
{
struct virtio_net *dev;
struct vhost_memory_region *mem_regions;
return -1;
if (dev->mem) {
- munmap((void*)(uintptr_t)dev->mem->mapped_address, (size_t)dev->mem->mapped_size);
+ munmap((void *)(uintptr_t)dev->mem->mapped_address,
+ (size_t)dev->mem->mapped_size);
free(dev->mem);
}
/* Malloc the memory structure depending on the number of regions. */
- mem = calloc(1, sizeof(struct virtio_memory) + (sizeof(struct virtio_memory_regions) * nregions));
+ mem = calloc(1, sizeof(struct virtio_memory) +
+ (sizeof(struct virtio_memory_regions) * nregions));
if (mem == NULL) {
- RTE_LOG(ERR, VHOST_CONFIG, "(%"PRIu64") Failed to allocate memory for dev->mem.\n", dev->device_fh);
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "(%"PRIu64") Failed to allocate memory for dev->mem.\n",
+ dev->device_fh);
return -1;
}
mem->nregions = nregions;
- mem_regions = (void*)(uintptr_t)((uint64_t)(uintptr_t)mem_regions_addr + size);
+ mem_regions = (void *)(uintptr_t)
+ ((uint64_t)(uintptr_t)mem_regions_addr + size);
for (regionidx = 0; regionidx < mem->nregions; regionidx++) {
/* Populate the region structure for each region. */
- mem->regions[regionidx].guest_phys_address = mem_regions[regionidx].guest_phys_addr;
- mem->regions[regionidx].guest_phys_address_end = mem->regions[regionidx].guest_phys_address +
+ mem->regions[regionidx].guest_phys_address =
+ mem_regions[regionidx].guest_phys_addr;
+ mem->regions[regionidx].guest_phys_address_end =
+ mem->regions[regionidx].guest_phys_address +
+ mem_regions[regionidx].memory_size;
+ mem->regions[regionidx].memory_size =
mem_regions[regionidx].memory_size;
- mem->regions[regionidx].memory_size = mem_regions[regionidx].memory_size;
- mem->regions[regionidx].userspace_address = mem_regions[regionidx].userspace_addr;
+ mem->regions[regionidx].userspace_address =
+ mem_regions[regionidx].userspace_addr;
LOG_DEBUG(VHOST_CONFIG, "(%"PRIu64") REGION: %u - GPA: %p - QEMU VA: %p - SIZE (%"PRIu64")\n", dev->device_fh,
- regionidx, (void*)(uintptr_t)mem->regions[regionidx].guest_phys_address,
- (void*)(uintptr_t)mem->regions[regionidx].userspace_address,
- mem->regions[regionidx].memory_size);
+ regionidx,
+ (void *)(uintptr_t)mem->regions[regionidx].guest_phys_address,
+ (void *)(uintptr_t)mem->regions[regionidx].userspace_address,
+ mem->regions[regionidx].memory_size);
/*set the base address mapping*/
if (mem->regions[regionidx].guest_phys_address == 0x0) {
- mem->base_address = mem->regions[regionidx].userspace_address;
+ mem->base_address =
+ mem->regions[regionidx].userspace_address;
/* Map VM memory file */
- if (host_memory_map(dev, mem, ctx.pid, mem->base_address) != 0) {
+ if (host_memory_map(dev, mem, ctx.pid,
+ mem->base_address) != 0) {
free(mem);
return -1;
}
return -1;
}
- /* Check if all of our regions have valid mappings. Usually one does not exist in the QEMU memory file. */
+ /*
+ * Check if all of our regions have valid mappings.
+ * Usually one does not exist in the QEMU memory file.
+ */
valid_regions = mem->nregions;
for (regionidx = 0; regionidx < mem->nregions; regionidx++) {
- if ((mem->regions[regionidx].userspace_address < mem->base_address) ||
- (mem->regions[regionidx].userspace_address > (mem->base_address + mem->mapped_size)))
+ if ((mem->regions[regionidx].userspace_address <
+ mem->base_address) ||
+ (mem->regions[regionidx].userspace_address >
+ (mem->base_address + mem->mapped_size)))
valid_regions--;
}
- /* If a region does not have a valid mapping we rebuild our memory struct to contain only valid entries. */
+ /*
+ * If a region does not have a valid mapping,
+ * we rebuild our memory struct to contain only valid entries.
+ */
if (valid_regions != mem->nregions) {
LOG_DEBUG(VHOST_CONFIG, "(%"PRIu64") Not all memory regions exist in the QEMU mem file. Re-populating mem structure\n",
dev->device_fh);
- /* Re-populate the memory structure with only valid regions. Invalid regions are over-written with memmove. */
+ /*
+ * Re-populate the memory structure with only valid regions.
+ * Invalid regions are over-written with memmove.
+ */
valid_regions = 0;
for (regionidx = mem->nregions; 0 != regionidx--;) {
- if ((mem->regions[regionidx].userspace_address < mem->base_address) ||
- (mem->regions[regionidx].userspace_address > (mem->base_address + mem->mapped_size))) {
- memmove(&mem->regions[regionidx], &mem->regions[regionidx + 1],
- sizeof(struct virtio_memory_regions) * valid_regions);
+ if ((mem->regions[regionidx].userspace_address <
+ mem->base_address) ||
+ (mem->regions[regionidx].userspace_address >
+ (mem->base_address + mem->mapped_size))) {
+ memmove(&mem->regions[regionidx],
+ &mem->regions[regionidx + 1],
+ sizeof(struct virtio_memory_regions) *
+ valid_regions);
} else {
valid_regions++;
}
dev->mem = mem;
/*
- * Calculate the address offset for each region. This offset is used to identify the vhost virtual address
+ * Calculate the address offset for each region.
+ * This offset is used to identify the vhost virtual address
* corresponding to a QEMU guest physical address.
*/
for (regionidx = 0; regionidx < dev->mem->nregions; regionidx++) {
- dev->mem->regions[regionidx].address_offset = dev->mem->regions[regionidx].userspace_address - dev->mem->base_address
- + dev->mem->mapped_address - dev->mem->regions[regionidx].guest_phys_address;
+ dev->mem->regions[regionidx].address_offset =
+ dev->mem->regions[regionidx].userspace_address -
+ dev->mem->base_address +
+ dev->mem->mapped_address -
+ dev->mem->regions[regionidx].guest_phys_address;
}
return 0;
if (dev == NULL)
return -1;
- /* State->index refers to the queue index. The TX queue is 1, RX queue is 0. */
+ /* State->index refers to the queue index. The txq is 1, rxq is 0. */
dev->virtqueue[state->index]->size = state->num;
return 0;
/*
* Called from CUSE IOCTL: VHOST_SET_VRING_ADDR
- * The virtio device sends us the desc, used and avail ring addresses. This function
- * then converts these to our address space.
+ * The virtio device sends us the desc, used and avail ring addresses.
+ * This function then converts these to our address space.
*/
static int
set_vring_addr(struct vhost_device_ctx ctx, struct vhost_vring_addr *addr)
if (dev == NULL)
return -1;
- /* addr->index refers to the queue index. The TX queue is 1, RX queue is 0. */
+ /* addr->index refers to the queue index. The txq 1, rxq is 0. */
vq = dev->virtqueue[addr->index];
/* The addresses are converted from QEMU virtual to Vhost virtual. */
- vq->desc = (struct vring_desc*)(uintptr_t)qva_to_vva(dev, addr->desc_user_addr);
+ vq->desc = (struct vring_desc *)(uintptr_t)qva_to_vva(dev,
+ addr->desc_user_addr);
if (vq->desc == 0) {
- RTE_LOG(ERR, VHOST_CONFIG, "(%"PRIu64") Failed to find descriptor ring address.\n", dev->device_fh);
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "(%"PRIu64") Failed to find desc ring address.\n",
+ dev->device_fh);
return -1;
}
- vq->avail = (struct vring_avail*)(uintptr_t)qva_to_vva(dev, addr->avail_user_addr);
+ vq->avail = (struct vring_avail *)(uintptr_t)qva_to_vva(dev,
+ addr->avail_user_addr);
if (vq->avail == 0) {
- RTE_LOG(ERR, VHOST_CONFIG, "(%"PRIu64") Failed to find available ring address.\n", dev->device_fh);
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "(%"PRIu64") Failed to find avail ring address.\n",
+ dev->device_fh);
return -1;
}
- vq->used = (struct vring_used*)(uintptr_t)qva_to_vva(dev, addr->used_user_addr);
+ vq->used = (struct vring_used *)(uintptr_t)qva_to_vva(dev,
+ addr->used_user_addr);
if (vq->used == 0) {
- RTE_LOG(ERR, VHOST_CONFIG, "(%"PRIu64") Failed to find used ring address.\n", dev->device_fh);
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "(%"PRIu64") Failed to find used ring address.\n",
+ dev->device_fh);
return -1;
}
- LOG_DEBUG(VHOST_CONFIG, "(%"PRIu64") mapped address desc: %p\n", dev->device_fh, vq->desc);
- LOG_DEBUG(VHOST_CONFIG, "(%"PRIu64") mapped address avail: %p\n", dev->device_fh, vq->avail);
- LOG_DEBUG(VHOST_CONFIG, "(%"PRIu64") mapped address used: %p\n", dev->device_fh, vq->used);
+ LOG_DEBUG(VHOST_CONFIG, "(%"PRIu64") mapped address desc: %p\n",
+ dev->device_fh, vq->desc);
+ LOG_DEBUG(VHOST_CONFIG, "(%"PRIu64") mapped address avail: %p\n",
+ dev->device_fh, vq->avail);
+ LOG_DEBUG(VHOST_CONFIG, "(%"PRIu64") mapped address used: %p\n",
+ dev->device_fh, vq->used);
return 0;
}
if (dev == NULL)
return -1;
- /* State->index refers to the queue index. The TX queue is 1, RX queue is 0. */
+ /* State->index refers to the queue index. The txq is 1, rxq is 0. */
dev->virtqueue[state->index]->last_used_idx = state->num;
dev->virtqueue[state->index]->last_used_idx_res = state->num;
* We send the virtio device our available ring last used index.
*/
static int
-get_vring_base(struct vhost_device_ctx ctx, uint32_t index, struct vhost_vring_state *state)
+get_vring_base(struct vhost_device_ctx ctx, uint32_t index,
+ struct vhost_vring_state *state)
{
struct virtio_net *dev;
return -1;
state->index = index;
- /* State->index refers to the queue index. The TX queue is 1, RX queue is 0. */
+ /* State->index refers to the queue index. The txq is 1, rxq is 0. */
state->num = dev->virtqueue[state->index]->last_used_idx;
return 0;
}
/*
- * This function uses the eventfd_link kernel module to copy an eventfd file descriptor
- * provided by QEMU in to our process space.
+ * This function uses the eventfd_link kernel module to copy an eventfd file
+ * descriptor provided by QEMU in to our process space.
*/
static int
eventfd_copy(struct virtio_net *dev, struct eventfd_copy *eventfd_copy)
/* Open the character device to the kernel module. */
eventfd_link = open(eventfd_cdev, O_RDWR);
if (eventfd_link < 0) {
- RTE_LOG(ERR, VHOST_CONFIG, "(%"PRIu64") eventfd_link module is not loaded\n", dev->device_fh);
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "(%"PRIu64") eventfd_link module is not loaded\n",
+ dev->device_fh);
return -1;
}
close(eventfd_link);
if (ret < 0) {
- RTE_LOG(ERR, VHOST_CONFIG, "(%"PRIu64") EVENTFD_COPY ioctl failed\n", dev->device_fh);
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "(%"PRIu64") EVENTFD_COPY ioctl failed\n",
+ dev->device_fh);
return -1;
}
-
return 0;
}
/*
* Called from CUSE IOCTL: VHOST_SET_VRING_CALL
- * The virtio device sends an eventfd to interrupt the guest. This fd gets copied in
- * to our process space.
+ * The virtio device sends an eventfd to interrupt the guest. This fd gets
+ * copied into our process space.
*/
static int
set_vring_call(struct vhost_device_ctx ctx, struct vhost_vring_file *file)
if (dev == NULL)
return -1;
- /* file->index refers to the queue index. The TX queue is 1, RX queue is 0. */
+ /* file->index refers to the queue index. The txq is 1, rxq is 0. */
vq = dev->virtqueue[file->index];
if (vq->kickfd)
/*
* Called from CUSE IOCTL: VHOST_SET_VRING_KICK
- * The virtio device sends an eventfd that it can use to notify us. This fd gets copied in
- * to our process space.
+ * The virtio device sends an eventfd that it can use to notify us.
+ * This fd gets copied into our process space.
*/
static int
set_vring_kick(struct vhost_device_ctx ctx, struct vhost_vring_file *file)
if (dev == NULL)
return -1;
- /* file->index refers to the queue index. The TX queue is 1, RX queue is 0. */
+ /* file->index refers to the queue index. The txq is 1, rxq is 0. */
vq = dev->virtqueue[file->index];
if (vq->callfd)
eventfd_call.target_pid = ctx.pid;
if (eventfd_copy(dev, &eventfd_call))
- return -1;
+ return -1;
return 0;
}
/*
* Called from CUSE IOCTL: VHOST_NET_SET_BACKEND
- * To complete device initialisation when the virtio driver is loaded we are provided with a
- * valid fd for a tap device (not used by us). If this happens then we can add the device to a
- * data core. When the virtio driver is removed we get fd=-1. At that point we remove the device
- * from the data core. The device will still exist in the device configuration linked list.
+ * To complete device initialisation when the virtio driver is loaded,
+ * we are provided with a valid fd for a tap device (not used by us).
+ * If this happens then we can add the device to a data core.
+ * When the virtio driver is removed we get fd=-1.
+ * At that point we remove the device from the data core.
+ * The device will still exist in the device configuration linked list.
*/
static int
set_backend(struct vhost_device_ctx ctx, struct vhost_vring_file *file)
struct virtio_net *dev;
dev = get_device(ctx);
- if (dev == NULL) {
+ if (dev == NULL)
return -1;
- }
- /* file->index refers to the queue index. The TX queue is 1, RX queue is 0. */
+ /* file->index refers to the queue index. The txq is 1, rxq is 0. */
dev->virtqueue[file->index]->backend = file->fd;
- /* If the device isn't already running and both backend fds are set we add the device. */
+ /*
+ * If the device isn't already running and both backend fds are set,
+ * we add the device.
+ */
if (!(dev->flags & VIRTIO_DEV_RUNNING)) {
if (((int)dev->virtqueue[VIRTIO_TXQ]->backend != VIRTIO_DEV_STOPPED) &&
((int)dev->virtqueue[VIRTIO_RXQ]->backend != VIRTIO_DEV_STOPPED))
return notify_ops->new_device(dev);
/* Otherwise we remove it. */
} else
- if (file->fd == VIRTIO_DEV_STOPPED) {
+ if (file->fd == VIRTIO_DEV_STOPPED)
notify_ops->destroy_device(dev);
- }
return 0;
}
/*
- * Function pointers are set for the device operations to allow CUSE to call functions
- * when an IOCTL, device_add or device_release is received.
+ * Function pointers are set for the device operations to allow CUSE to call
+ * functions when an IOCTL, device_add or device_release is received.
*/
-static const struct vhost_net_device_ops vhost_device_ops =
-{
+static const struct vhost_net_device_ops vhost_device_ops = {
.new_device = new_device,
.destroy_device = destroy_device,
return &vhost_device_ops;
}
-int rte_vhost_enable_guest_notification(struct virtio_net *dev, uint16_t queue_id, int enable)
+int rte_vhost_enable_guest_notification(struct virtio_net *dev,
+ uint16_t queue_id, int enable)
{
if (enable) {
- RTE_LOG(ERR, VHOST_CONFIG, "guest notification isn't supported.\n");
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "guest notification isn't supported.\n");
return -1;
}
- dev->virtqueue[queue_id]->used->flags = enable ? 0 : VRING_USED_F_NO_NOTIFY;
+ dev->virtqueue[queue_id]->used->flags =
+ enable ? 0 : VRING_USED_F_NO_NOTIFY;
return 0;
}
git.droids-corp.org / dpdk.git / blobdiff