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mpssd.c
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mpssd.c
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// SPDX-License-Identifier: GPL-2.0-only
/*
* Intel MIC Platform Software Stack (MPSS)
*
* Copyright(c) 2013 Intel Corporation.
*
* Intel MIC User Space Tools.
*/
#define _GNU_SOURCE
#include <stdlib.h>
#include <fcntl.h>
#include <getopt.h>
#include <assert.h>
#include <unistd.h>
#include <stdbool.h>
#include <signal.h>
#include <poll.h>
#include <features.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/mman.h>
#include <sys/socket.h>
#include <linux/virtio_ring.h>
#include <linux/virtio_net.h>
#include <linux/virtio_console.h>
#include <linux/virtio_blk.h>
#include <linux/version.h>
#include "mpssd.h"
#include <linux/mic_ioctl.h>
#include <linux/mic_common.h>
#include <tools/endian.h>
static void *init_mic(void *arg);
static FILE *logfp;
static struct mic_info mic_list;
#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
#define min_t(type, x, y) ({ \
type __min1 = (x); \
type __min2 = (y); \
__min1 < __min2 ? __min1 : __min2; })
/* align addr on a size boundary - adjust address up/down if needed */
#define _ALIGN_DOWN(addr, size) ((addr)&(~((size)-1)))
#define _ALIGN_UP(addr, size) _ALIGN_DOWN(addr + size - 1, size)
/* align addr on a size boundary - adjust address up if needed */
#define _ALIGN(addr, size) _ALIGN_UP(addr, size)
/* to align the pointer to the (next) page boundary */
#define PAGE_ALIGN(addr) _ALIGN(addr, PAGE_SIZE)
#define READ_ONCE(x) (*(volatile typeof(x) *)&(x))
#define GSO_ENABLED 1
#define MAX_GSO_SIZE (64 * 1024)
#define ETH_H_LEN 14
#define MAX_NET_PKT_SIZE (_ALIGN_UP(MAX_GSO_SIZE + ETH_H_LEN, 64))
#define MIC_DEVICE_PAGE_END 0x1000
#ifndef VIRTIO_NET_HDR_F_DATA_VALID
#define VIRTIO_NET_HDR_F_DATA_VALID 2 /* Csum is valid */
#endif
static struct {
struct mic_device_desc dd;
struct mic_vqconfig vqconfig[2];
__u32 host_features, guest_acknowledgements;
struct virtio_console_config cons_config;
} virtcons_dev_page = {
.dd = {
.type = VIRTIO_ID_CONSOLE,
.num_vq = ARRAY_SIZE(virtcons_dev_page.vqconfig),
.feature_len = sizeof(virtcons_dev_page.host_features),
.config_len = sizeof(virtcons_dev_page.cons_config),
},
.vqconfig[0] = {
.num = htole16(MIC_VRING_ENTRIES),
},
.vqconfig[1] = {
.num = htole16(MIC_VRING_ENTRIES),
},
};
static struct {
struct mic_device_desc dd;
struct mic_vqconfig vqconfig[2];
__u32 host_features, guest_acknowledgements;
struct virtio_net_config net_config;
} virtnet_dev_page = {
.dd = {
.type = VIRTIO_ID_NET,
.num_vq = ARRAY_SIZE(virtnet_dev_page.vqconfig),
.feature_len = sizeof(virtnet_dev_page.host_features),
.config_len = sizeof(virtnet_dev_page.net_config),
},
.vqconfig[0] = {
.num = htole16(MIC_VRING_ENTRIES),
},
.vqconfig[1] = {
.num = htole16(MIC_VRING_ENTRIES),
},
#if GSO_ENABLED
.host_features = htole32(
1 << VIRTIO_NET_F_CSUM |
1 << VIRTIO_NET_F_GSO |
1 << VIRTIO_NET_F_GUEST_TSO4 |
1 << VIRTIO_NET_F_GUEST_TSO6 |
1 << VIRTIO_NET_F_GUEST_ECN),
#else
.host_features = 0,
#endif
};
static const char *mic_config_dir = "/etc/mpss";
static const char *virtblk_backend = "VIRTBLK_BACKEND";
static struct {
struct mic_device_desc dd;
struct mic_vqconfig vqconfig[1];
__u32 host_features, guest_acknowledgements;
struct virtio_blk_config blk_config;
} virtblk_dev_page = {
.dd = {
.type = VIRTIO_ID_BLOCK,
.num_vq = ARRAY_SIZE(virtblk_dev_page.vqconfig),
.feature_len = sizeof(virtblk_dev_page.host_features),
.config_len = sizeof(virtblk_dev_page.blk_config),
},
.vqconfig[0] = {
.num = htole16(MIC_VRING_ENTRIES),
},
.host_features =
htole32(1<<VIRTIO_BLK_F_SEG_MAX),
.blk_config = {
.seg_max = htole32(MIC_VRING_ENTRIES - 2),
.capacity = htole64(0),
}
};
static char *myname;
static int
tap_configure(struct mic_info *mic, char *dev)
{
pid_t pid;
char *ifargv[7];
char ipaddr[IFNAMSIZ];
int ret = 0;
pid = fork();
if (pid == 0) {
ifargv[0] = "ip";
ifargv[1] = "link";
ifargv[2] = "set";
ifargv[3] = dev;
ifargv[4] = "up";
ifargv[5] = NULL;
mpsslog("Configuring %s\n", dev);
ret = execvp("ip", ifargv);
if (ret < 0) {
mpsslog("%s execvp failed errno %s\n",
mic->name, strerror(errno));
return ret;
}
}
if (pid < 0) {
mpsslog("%s fork failed errno %s\n",
mic->name, strerror(errno));
return ret;
}
ret = waitpid(pid, NULL, 0);
if (ret < 0) {
mpsslog("%s waitpid failed errno %s\n",
mic->name, strerror(errno));
return ret;
}
snprintf(ipaddr, IFNAMSIZ, "172.31.%d.254/24", mic->id + 1);
pid = fork();
if (pid == 0) {
ifargv[0] = "ip";
ifargv[1] = "addr";
ifargv[2] = "add";
ifargv[3] = ipaddr;
ifargv[4] = "dev";
ifargv[5] = dev;
ifargv[6] = NULL;
mpsslog("Configuring %s ipaddr %s\n", dev, ipaddr);
ret = execvp("ip", ifargv);
if (ret < 0) {
mpsslog("%s execvp failed errno %s\n",
mic->name, strerror(errno));
return ret;
}
}
if (pid < 0) {
mpsslog("%s fork failed errno %s\n",
mic->name, strerror(errno));
return ret;
}
ret = waitpid(pid, NULL, 0);
if (ret < 0) {
mpsslog("%s waitpid failed errno %s\n",
mic->name, strerror(errno));
return ret;
}
mpsslog("MIC name %s %s %d DONE!\n",
mic->name, __func__, __LINE__);
return 0;
}
static int tun_alloc(struct mic_info *mic, char *dev)
{
struct ifreq ifr;
int fd, err;
#if GSO_ENABLED
unsigned offload;
#endif
fd = open("/dev/net/tun", O_RDWR);
if (fd < 0) {
mpsslog("Could not open /dev/net/tun %s\n", strerror(errno));
goto done;
}
memset(&ifr, 0, sizeof(ifr));
ifr.ifr_flags = IFF_TAP | IFF_NO_PI | IFF_VNET_HDR;
if (*dev)
strncpy(ifr.ifr_name, dev, IFNAMSIZ);
err = ioctl(fd, TUNSETIFF, (void *)&ifr);
if (err < 0) {
mpsslog("%s %s %d TUNSETIFF failed %s\n",
mic->name, __func__, __LINE__, strerror(errno));
close(fd);
return err;
}
#if GSO_ENABLED
offload = TUN_F_CSUM | TUN_F_TSO4 | TUN_F_TSO6 | TUN_F_TSO_ECN;
err = ioctl(fd, TUNSETOFFLOAD, offload);
if (err < 0) {
mpsslog("%s %s %d TUNSETOFFLOAD failed %s\n",
mic->name, __func__, __LINE__, strerror(errno));
close(fd);
return err;
}
#endif
strcpy(dev, ifr.ifr_name);
mpsslog("Created TAP %s\n", dev);
done:
return fd;
}
#define NET_FD_VIRTIO_NET 0
#define NET_FD_TUN 1
#define MAX_NET_FD 2
static void set_dp(struct mic_info *mic, int type, void *dp)
{
switch (type) {
case VIRTIO_ID_CONSOLE:
mic->mic_console.console_dp = dp;
return;
case VIRTIO_ID_NET:
mic->mic_net.net_dp = dp;
return;
case VIRTIO_ID_BLOCK:
mic->mic_virtblk.block_dp = dp;
return;
}
mpsslog("%s %s %d not found\n", mic->name, __func__, type);
assert(0);
}
static void *get_dp(struct mic_info *mic, int type)
{
switch (type) {
case VIRTIO_ID_CONSOLE:
return mic->mic_console.console_dp;
case VIRTIO_ID_NET:
return mic->mic_net.net_dp;
case VIRTIO_ID_BLOCK:
return mic->mic_virtblk.block_dp;
}
mpsslog("%s %s %d not found\n", mic->name, __func__, type);
assert(0);
return NULL;
}
static struct mic_device_desc *get_device_desc(struct mic_info *mic, int type)
{
struct mic_device_desc *d;
int i;
void *dp = get_dp(mic, type);
for (i = sizeof(struct mic_bootparam); i < PAGE_SIZE;
i += mic_total_desc_size(d)) {
d = dp + i;
/* End of list */
if (d->type == 0)
break;
if (d->type == -1)
continue;
mpsslog("%s %s d-> type %d d %p\n",
mic->name, __func__, d->type, d);
if (d->type == (__u8)type)
return d;
}
mpsslog("%s %s %d not found\n", mic->name, __func__, type);
return NULL;
}
/* See comments in vhost.c for explanation of next_desc() */
static unsigned next_desc(struct vring_desc *desc)
{
unsigned int next;
if (!(le16toh(desc->flags) & VRING_DESC_F_NEXT))
return -1U;
next = le16toh(desc->next);
return next;
}
/* Sum up all the IOVEC length */
static ssize_t
sum_iovec_len(struct mic_copy_desc *copy)
{
ssize_t sum = 0;
unsigned int i;
for (i = 0; i < copy->iovcnt; i++)
sum += copy->iov[i].iov_len;
return sum;
}
static inline void verify_out_len(struct mic_info *mic,
struct mic_copy_desc *copy)
{
if (copy->out_len != sum_iovec_len(copy)) {
mpsslog("%s %s %d BUG copy->out_len 0x%x len 0x%zx\n",
mic->name, __func__, __LINE__,
copy->out_len, sum_iovec_len(copy));
assert(copy->out_len == sum_iovec_len(copy));
}
}
/* Display an iovec */
static void
disp_iovec(struct mic_info *mic, struct mic_copy_desc *copy,
const char *s, int line)
{
unsigned int i;
for (i = 0; i < copy->iovcnt; i++)
mpsslog("%s %s %d copy->iov[%d] addr %p len 0x%zx\n",
mic->name, s, line, i,
copy->iov[i].iov_base, copy->iov[i].iov_len);
}
static inline __u16 read_avail_idx(struct mic_vring *vr)
{
return READ_ONCE(vr->info->avail_idx);
}
static inline void txrx_prepare(int type, bool tx, struct mic_vring *vr,
struct mic_copy_desc *copy, ssize_t len)
{
copy->vr_idx = tx ? 0 : 1;
copy->update_used = true;
if (type == VIRTIO_ID_NET)
copy->iov[1].iov_len = len - sizeof(struct virtio_net_hdr);
else
copy->iov[0].iov_len = len;
}
/* Central API which triggers the copies */
static int
mic_virtio_copy(struct mic_info *mic, int fd,
struct mic_vring *vr, struct mic_copy_desc *copy)
{
int ret;
ret = ioctl(fd, MIC_VIRTIO_COPY_DESC, copy);
if (ret) {
mpsslog("%s %s %d errno %s ret %d\n",
mic->name, __func__, __LINE__,
strerror(errno), ret);
}
return ret;
}
static inline unsigned _vring_size(unsigned int num, unsigned long align)
{
return ((sizeof(struct vring_desc) * num + sizeof(__u16) * (3 + num)
+ align - 1) & ~(align - 1))
+ sizeof(__u16) * 3 + sizeof(struct vring_used_elem) * num;
}
/*
* This initialization routine requires at least one
* vring i.e. vr0. vr1 is optional.
*/
static void *
init_vr(struct mic_info *mic, int fd, int type,
struct mic_vring *vr0, struct mic_vring *vr1, int num_vq)
{
int vr_size;
char *va;
vr_size = PAGE_ALIGN(_vring_size(MIC_VRING_ENTRIES,
MIC_VIRTIO_RING_ALIGN) +
sizeof(struct _mic_vring_info));
va = mmap(NULL, MIC_DEVICE_PAGE_END + vr_size * num_vq,
PROT_READ, MAP_SHARED, fd, 0);
if (MAP_FAILED == va) {
mpsslog("%s %s %d mmap failed errno %s\n",
mic->name, __func__, __LINE__,
strerror(errno));
goto done;
}
set_dp(mic, type, va);
vr0->va = (struct mic_vring *)&va[MIC_DEVICE_PAGE_END];
vr0->info = vr0->va +
_vring_size(MIC_VRING_ENTRIES, MIC_VIRTIO_RING_ALIGN);
vring_init(&vr0->vr,
MIC_VRING_ENTRIES, vr0->va, MIC_VIRTIO_RING_ALIGN);
mpsslog("%s %s vr0 %p vr0->info %p vr_size 0x%x vring 0x%x ",
__func__, mic->name, vr0->va, vr0->info, vr_size,
_vring_size(MIC_VRING_ENTRIES, MIC_VIRTIO_RING_ALIGN));
mpsslog("magic 0x%x expected 0x%x\n",
le32toh(vr0->info->magic), MIC_MAGIC + type);
assert(le32toh(vr0->info->magic) == MIC_MAGIC + type);
if (vr1) {
vr1->va = (struct mic_vring *)
&va[MIC_DEVICE_PAGE_END + vr_size];
vr1->info = vr1->va + _vring_size(MIC_VRING_ENTRIES,
MIC_VIRTIO_RING_ALIGN);
vring_init(&vr1->vr,
MIC_VRING_ENTRIES, vr1->va, MIC_VIRTIO_RING_ALIGN);
mpsslog("%s %s vr1 %p vr1->info %p vr_size 0x%x vring 0x%x ",
__func__, mic->name, vr1->va, vr1->info, vr_size,
_vring_size(MIC_VRING_ENTRIES, MIC_VIRTIO_RING_ALIGN));
mpsslog("magic 0x%x expected 0x%x\n",
le32toh(vr1->info->magic), MIC_MAGIC + type + 1);
assert(le32toh(vr1->info->magic) == MIC_MAGIC + type + 1);
}
done:
return va;
}
static int
wait_for_card_driver(struct mic_info *mic, int fd, int type)
{
struct pollfd pollfd;
int err;
struct mic_device_desc *desc = get_device_desc(mic, type);
__u8 prev_status;
if (!desc)
return -ENODEV;
prev_status = desc->status;
pollfd.fd = fd;
mpsslog("%s %s Waiting .... desc-> type %d status 0x%x\n",
mic->name, __func__, type, desc->status);
while (1) {
pollfd.events = POLLIN;
pollfd.revents = 0;
err = poll(&pollfd, 1, -1);
if (err < 0) {
mpsslog("%s %s poll failed %s\n",
mic->name, __func__, strerror(errno));
continue;
}
if (pollfd.revents) {
if (desc->status != prev_status) {
mpsslog("%s %s Waiting... desc-> type %d "
"status 0x%x\n",
mic->name, __func__, type,
desc->status);
prev_status = desc->status;
}
if (desc->status & VIRTIO_CONFIG_S_DRIVER_OK) {
mpsslog("%s %s poll.revents %d\n",
mic->name, __func__, pollfd.revents);
mpsslog("%s %s desc-> type %d status 0x%x\n",
mic->name, __func__, type,
desc->status);
break;
}
}
}
return 0;
}
/* Spin till we have some descriptors */
static void
spin_for_descriptors(struct mic_info *mic, struct mic_vring *vr)
{
__u16 avail_idx = read_avail_idx(vr);
while (avail_idx == le16toh(READ_ONCE(vr->vr.avail->idx))) {
#ifdef DEBUG
mpsslog("%s %s waiting for desc avail %d info_avail %d\n",
mic->name, __func__,
le16toh(vr->vr.avail->idx), vr->info->avail_idx);
#endif
sched_yield();
}
}
static void *
virtio_net(void *arg)
{
static __u8 vnet_hdr[2][sizeof(struct virtio_net_hdr)];
static __u8 vnet_buf[2][MAX_NET_PKT_SIZE] __attribute__ ((aligned(64)));
struct iovec vnet_iov[2][2] = {
{ { .iov_base = vnet_hdr[0], .iov_len = sizeof(vnet_hdr[0]) },
{ .iov_base = vnet_buf[0], .iov_len = sizeof(vnet_buf[0]) } },
{ { .iov_base = vnet_hdr[1], .iov_len = sizeof(vnet_hdr[1]) },
{ .iov_base = vnet_buf[1], .iov_len = sizeof(vnet_buf[1]) } },
};
struct iovec *iov0 = vnet_iov[0], *iov1 = vnet_iov[1];
struct mic_info *mic = (struct mic_info *)arg;
char if_name[IFNAMSIZ];
struct pollfd net_poll[MAX_NET_FD];
struct mic_vring tx_vr, rx_vr;
struct mic_copy_desc copy;
struct mic_device_desc *desc;
int err;
snprintf(if_name, IFNAMSIZ, "mic%d", mic->id);
mic->mic_net.tap_fd = tun_alloc(mic, if_name);
if (mic->mic_net.tap_fd < 0)
goto done;
if (tap_configure(mic, if_name))
goto done;
mpsslog("MIC name %s id %d\n", mic->name, mic->id);
net_poll[NET_FD_VIRTIO_NET].fd = mic->mic_net.virtio_net_fd;
net_poll[NET_FD_VIRTIO_NET].events = POLLIN;
net_poll[NET_FD_TUN].fd = mic->mic_net.tap_fd;
net_poll[NET_FD_TUN].events = POLLIN;
if (MAP_FAILED == init_vr(mic, mic->mic_net.virtio_net_fd,
VIRTIO_ID_NET, &tx_vr, &rx_vr,
virtnet_dev_page.dd.num_vq)) {
mpsslog("%s init_vr failed %s\n",
mic->name, strerror(errno));
goto done;
}
copy.iovcnt = 2;
desc = get_device_desc(mic, VIRTIO_ID_NET);
while (1) {
ssize_t len;
net_poll[NET_FD_VIRTIO_NET].revents = 0;
net_poll[NET_FD_TUN].revents = 0;
/* Start polling for data from tap and virtio net */
err = poll(net_poll, 2, -1);
if (err < 0) {
mpsslog("%s poll failed %s\n",
__func__, strerror(errno));
continue;
}
if (!(desc->status & VIRTIO_CONFIG_S_DRIVER_OK)) {
err = wait_for_card_driver(mic,
mic->mic_net.virtio_net_fd,
VIRTIO_ID_NET);
if (err) {
mpsslog("%s %s %d Exiting...\n",
mic->name, __func__, __LINE__);
break;
}
}
/*
* Check if there is data to be read from TUN and write to
* virtio net fd if there is.
*/
if (net_poll[NET_FD_TUN].revents & POLLIN) {
copy.iov = iov0;
len = readv(net_poll[NET_FD_TUN].fd,
copy.iov, copy.iovcnt);
if (len > 0) {
struct virtio_net_hdr *hdr
= (struct virtio_net_hdr *)vnet_hdr[0];
/* Disable checksums on the card since we are on
a reliable PCIe link */
hdr->flags |= VIRTIO_NET_HDR_F_DATA_VALID;
#ifdef DEBUG
mpsslog("%s %s %d hdr->flags 0x%x ", mic->name,
__func__, __LINE__, hdr->flags);
mpsslog("copy.out_len %d hdr->gso_type 0x%x\n",
copy.out_len, hdr->gso_type);
#endif
#ifdef DEBUG
disp_iovec(mic, copy, __func__, __LINE__);
mpsslog("%s %s %d read from tap 0x%lx\n",
mic->name, __func__, __LINE__,
len);
#endif
spin_for_descriptors(mic, &tx_vr);
txrx_prepare(VIRTIO_ID_NET, 1, &tx_vr, ©,
len);
err = mic_virtio_copy(mic,
mic->mic_net.virtio_net_fd, &tx_vr,
©);
if (err < 0) {
mpsslog("%s %s %d mic_virtio_copy %s\n",
mic->name, __func__, __LINE__,
strerror(errno));
}
if (!err)
verify_out_len(mic, ©);
#ifdef DEBUG
disp_iovec(mic, copy, __func__, __LINE__);
mpsslog("%s %s %d wrote to net 0x%lx\n",
mic->name, __func__, __LINE__,
sum_iovec_len(©));
#endif
/* Reinitialize IOV for next run */
iov0[1].iov_len = MAX_NET_PKT_SIZE;
} else if (len < 0) {
disp_iovec(mic, ©, __func__, __LINE__);
mpsslog("%s %s %d read failed %s ", mic->name,
__func__, __LINE__, strerror(errno));
mpsslog("cnt %d sum %zd\n",
copy.iovcnt, sum_iovec_len(©));
}
}
/*
* Check if there is data to be read from virtio net and
* write to TUN if there is.
*/
if (net_poll[NET_FD_VIRTIO_NET].revents & POLLIN) {
while (rx_vr.info->avail_idx !=
le16toh(rx_vr.vr.avail->idx)) {
copy.iov = iov1;
txrx_prepare(VIRTIO_ID_NET, 0, &rx_vr, ©,
MAX_NET_PKT_SIZE
+ sizeof(struct virtio_net_hdr));
err = mic_virtio_copy(mic,
mic->mic_net.virtio_net_fd, &rx_vr,
©);
if (!err) {
#ifdef DEBUG
struct virtio_net_hdr *hdr
= (struct virtio_net_hdr *)
vnet_hdr[1];
mpsslog("%s %s %d hdr->flags 0x%x, ",
mic->name, __func__, __LINE__,
hdr->flags);
mpsslog("out_len %d gso_type 0x%x\n",
copy.out_len,
hdr->gso_type);
#endif
/* Set the correct output iov_len */
iov1[1].iov_len = copy.out_len -
sizeof(struct virtio_net_hdr);
verify_out_len(mic, ©);
#ifdef DEBUG
disp_iovec(mic, copy, __func__,
__LINE__);
mpsslog("%s %s %d ",
mic->name, __func__, __LINE__);
mpsslog("read from net 0x%lx\n",
sum_iovec_len(copy));
#endif
len = writev(net_poll[NET_FD_TUN].fd,
copy.iov, copy.iovcnt);
if (len != sum_iovec_len(©)) {
mpsslog("Tun write failed %s ",
strerror(errno));
mpsslog("len 0x%zx ", len);
mpsslog("read_len 0x%zx\n",
sum_iovec_len(©));
} else {
#ifdef DEBUG
disp_iovec(mic, ©, __func__,
__LINE__);
mpsslog("%s %s %d ",
mic->name, __func__,
__LINE__);
mpsslog("wrote to tap 0x%lx\n",
len);
#endif
}
} else {
mpsslog("%s %s %d mic_virtio_copy %s\n",
mic->name, __func__, __LINE__,
strerror(errno));
break;
}
}
}
if (net_poll[NET_FD_VIRTIO_NET].revents & POLLERR)
mpsslog("%s: %s: POLLERR\n", __func__, mic->name);
}
done:
pthread_exit(NULL);
}
/* virtio_console */
#define VIRTIO_CONSOLE_FD 0
#define MONITOR_FD (VIRTIO_CONSOLE_FD + 1)
#define MAX_CONSOLE_FD (MONITOR_FD + 1) /* must be the last one + 1 */
#define MAX_BUFFER_SIZE PAGE_SIZE
static void *
virtio_console(void *arg)
{
static __u8 vcons_buf[2][PAGE_SIZE];
struct iovec vcons_iov[2] = {
{ .iov_base = vcons_buf[0], .iov_len = sizeof(vcons_buf[0]) },
{ .iov_base = vcons_buf[1], .iov_len = sizeof(vcons_buf[1]) },
};
struct iovec *iov0 = &vcons_iov[0], *iov1 = &vcons_iov[1];
struct mic_info *mic = (struct mic_info *)arg;
int err;
struct pollfd console_poll[MAX_CONSOLE_FD];
int pty_fd;
char *pts_name;
ssize_t len;
struct mic_vring tx_vr, rx_vr;
struct mic_copy_desc copy;
struct mic_device_desc *desc;
pty_fd = posix_openpt(O_RDWR);
if (pty_fd < 0) {
mpsslog("can't open a pseudoterminal master device: %s\n",
strerror(errno));
goto _return;
}
pts_name = ptsname(pty_fd);
if (pts_name == NULL) {
mpsslog("can't get pts name\n");
goto _close_pty;
}
printf("%s console message goes to %s\n", mic->name, pts_name);
mpsslog("%s console message goes to %s\n", mic->name, pts_name);
err = grantpt(pty_fd);
if (err < 0) {
mpsslog("can't grant access: %s %s\n",
pts_name, strerror(errno));
goto _close_pty;
}
err = unlockpt(pty_fd);
if (err < 0) {
mpsslog("can't unlock a pseudoterminal: %s %s\n",
pts_name, strerror(errno));
goto _close_pty;
}
console_poll[MONITOR_FD].fd = pty_fd;
console_poll[MONITOR_FD].events = POLLIN;
console_poll[VIRTIO_CONSOLE_FD].fd = mic->mic_console.virtio_console_fd;
console_poll[VIRTIO_CONSOLE_FD].events = POLLIN;
if (MAP_FAILED == init_vr(mic, mic->mic_console.virtio_console_fd,
VIRTIO_ID_CONSOLE, &tx_vr, &rx_vr,
virtcons_dev_page.dd.num_vq)) {
mpsslog("%s init_vr failed %s\n",
mic->name, strerror(errno));
goto _close_pty;
}
copy.iovcnt = 1;
desc = get_device_desc(mic, VIRTIO_ID_CONSOLE);
for (;;) {
console_poll[MONITOR_FD].revents = 0;
console_poll[VIRTIO_CONSOLE_FD].revents = 0;
err = poll(console_poll, MAX_CONSOLE_FD, -1);
if (err < 0) {
mpsslog("%s %d: poll failed: %s\n", __func__, __LINE__,
strerror(errno));
continue;
}
if (!(desc->status & VIRTIO_CONFIG_S_DRIVER_OK)) {
err = wait_for_card_driver(mic,
mic->mic_console.virtio_console_fd,
VIRTIO_ID_CONSOLE);
if (err) {
mpsslog("%s %s %d Exiting...\n",
mic->name, __func__, __LINE__);
break;
}
}
if (console_poll[MONITOR_FD].revents & POLLIN) {
copy.iov = iov0;
len = readv(pty_fd, copy.iov, copy.iovcnt);
if (len > 0) {
#ifdef DEBUG
disp_iovec(mic, copy, __func__, __LINE__);
mpsslog("%s %s %d read from tap 0x%lx\n",
mic->name, __func__, __LINE__,
len);
#endif
spin_for_descriptors(mic, &tx_vr);
txrx_prepare(VIRTIO_ID_CONSOLE, 1, &tx_vr,
©, len);
err = mic_virtio_copy(mic,
mic->mic_console.virtio_console_fd,
&tx_vr, ©);
if (err < 0) {
mpsslog("%s %s %d mic_virtio_copy %s\n",
mic->name, __func__, __LINE__,
strerror(errno));
}
if (!err)
verify_out_len(mic, ©);
#ifdef DEBUG
disp_iovec(mic, copy, __func__, __LINE__);
mpsslog("%s %s %d wrote to net 0x%lx\n",
mic->name, __func__, __LINE__,
sum_iovec_len(copy));
#endif
/* Reinitialize IOV for next run */
iov0->iov_len = PAGE_SIZE;
} else if (len < 0) {
disp_iovec(mic, ©, __func__, __LINE__);
mpsslog("%s %s %d read failed %s ",
mic->name, __func__, __LINE__,
strerror(errno));
mpsslog("cnt %d sum %zd\n",
copy.iovcnt, sum_iovec_len(©));
}
}
if (console_poll[VIRTIO_CONSOLE_FD].revents & POLLIN) {
while (rx_vr.info->avail_idx !=
le16toh(rx_vr.vr.avail->idx)) {
copy.iov = iov1;
txrx_prepare(VIRTIO_ID_CONSOLE, 0, &rx_vr,
©, PAGE_SIZE);
err = mic_virtio_copy(mic,
mic->mic_console.virtio_console_fd,
&rx_vr, ©);
if (!err) {
/* Set the correct output iov_len */
iov1->iov_len = copy.out_len;
verify_out_len(mic, ©);
#ifdef DEBUG
disp_iovec(mic, copy, __func__,
__LINE__);
mpsslog("%s %s %d ",
mic->name, __func__, __LINE__);
mpsslog("read from net 0x%lx\n",
sum_iovec_len(copy));
#endif
len = writev(pty_fd,
copy.iov, copy.iovcnt);
if (len != sum_iovec_len(©)) {
mpsslog("Tun write failed %s ",
strerror(errno));
mpsslog("len 0x%zx ", len);
mpsslog("read_len 0x%zx\n",
sum_iovec_len(©));
} else {
#ifdef DEBUG
disp_iovec(mic, copy, __func__,
__LINE__);
mpsslog("%s %s %d ",
mic->name, __func__,
__LINE__);
mpsslog("wrote to tap 0x%lx\n",
len);
#endif
}
} else {
mpsslog("%s %s %d mic_virtio_copy %s\n",
mic->name, __func__, __LINE__,
strerror(errno));
break;
}
}
}
if (console_poll[NET_FD_VIRTIO_NET].revents & POLLERR)
mpsslog("%s: %s: POLLERR\n", __func__, mic->name);
}
_close_pty:
close(pty_fd);
_return:
pthread_exit(NULL);
}
static void
add_virtio_device(struct mic_info *mic, struct mic_device_desc *dd)
{
char path[PATH_MAX];
int fd, err;
snprintf(path, PATH_MAX, "/dev/vop_virtio%d", mic->id);
fd = open(path, O_RDWR);
if (fd < 0) {
mpsslog("Could not open %s %s\n", path, strerror(errno));
return;
}
err = ioctl(fd, MIC_VIRTIO_ADD_DEVICE, dd);
if (err < 0) {
mpsslog("Could not add %d %s\n", dd->type, strerror(errno));
close(fd);
return;
}
switch (dd->type) {
case VIRTIO_ID_NET:
mic->mic_net.virtio_net_fd = fd;
mpsslog("Added VIRTIO_ID_NET for %s\n", mic->name);
break;
case VIRTIO_ID_CONSOLE:
mic->mic_console.virtio_console_fd = fd;
mpsslog("Added VIRTIO_ID_CONSOLE for %s\n", mic->name);
break;
case VIRTIO_ID_BLOCK:
mic->mic_virtblk.virtio_block_fd = fd;
mpsslog("Added VIRTIO_ID_BLOCK for %s\n", mic->name);
break;
}
}
static bool
set_backend_file(struct mic_info *mic)
{
FILE *config;
char buff[PATH_MAX], *line, *evv, *p;
snprintf(buff, PATH_MAX, "%s/mpssd%03d.conf", mic_config_dir, mic->id);
config = fopen(buff, "r");
if (config == NULL)
return false;
do { /* look for "virtblk_backend=XXXX" */
line = fgets(buff, PATH_MAX, config);
if (line == NULL)
break;
if (*line == '#')
continue;
p = strchr(line, '\n');
if (p)
*p = '\0';
} while (strncmp(line, virtblk_backend, strlen(virtblk_backend)) != 0);
fclose(config);
if (line == NULL)
return false;
evv = strchr(line, '=');
if (evv == NULL)
return false;
mic->mic_virtblk.backend_file = malloc(strlen(evv) + 1);
if (mic->mic_virtblk.backend_file == NULL) {
mpsslog("%s %d can't allocate memory\n", mic->name, mic->id);
return false;
}
strcpy(mic->mic_virtblk.backend_file, evv + 1);
return true;
}
#define SECTOR_SIZE 512
static bool
set_backend_size(struct mic_info *mic)
{
mic->mic_virtblk.backend_size = lseek(mic->mic_virtblk.backend, 0,
SEEK_END);
if (mic->mic_virtblk.backend_size < 0) {
mpsslog("%s: can't seek: %s\n",
mic->name, mic->mic_virtblk.backend_file);
return false;
}
virtblk_dev_page.blk_config.capacity =
mic->mic_virtblk.backend_size / SECTOR_SIZE;
if ((mic->mic_virtblk.backend_size % SECTOR_SIZE) != 0)
virtblk_dev_page.blk_config.capacity++;
virtblk_dev_page.blk_config.capacity =
htole64(virtblk_dev_page.blk_config.capacity);