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kernel-fxtec-pro1x/samples/mic/mpssd/mpssd.c
Sherry Sun 424b9b83ac misc: vop: add round_up(x,4) for vring_size to avoid kernel panic 
[ Upstream commit cc1a2679865a94b83804822996eed010a50a7c1d ]

Since struct _mic_vring_info and vring are allocated together and follow
vring, if the vring_size() is not four bytes aligned, which will cause
the start address of struct _mic_vring_info is not four byte aligned.
For example, when vring entries is 128, the vring_size() will be 5126
bytes. The _mic_vring_info struct layout in ddr looks like:
0x90002400:  00000000 00390000 EE010000 0000C0FF
Here 0x39 is the avail_idx member, and 0xC0FFEE01 is the magic member.

When EP use ioread32(magic) to reads the magic in RC's share memory, it
will cause kernel panic on ARM64 platform due to the cross-byte io read.
Here read magic in user space use le32toh(vr0->info->magic) will meet
the same issue.
So add round_up(x,4) for vring_size, then the struct _mic_vring_info
will store in this way:
0x90002400:  00000000 00000000 00000039 C0FFEE01
Which will avoid kernel panic when read magic in struct _mic_vring_info.

Signed-off-by: Sherry Sun <sherry.sun@nxp.com>
Signed-off-by: Joakim Zhang <qiangqing.zhang@nxp.com>
Link: https://lore.kernel.org/r/20200929091106.24624-4-sherry.sun@nxp.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-10-30 10:38:29 +01:00

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/*
* Intel MIC Platform Software Stack (MPSS)
*
* Copyright(c) 2013 Intel Corporation.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License, version 2, as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* The full GNU General Public License is included in this distribution in
* the file called "COPYING".
*
* 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 _ALIGN_UP(((sizeof(struct vring_desc) * num + sizeof(__u16) * (3 + num)
+ align - 1) & ~(align - 1))
+ sizeof(__u16) * 3 + sizeof(struct vring_used_elem) * num, 4);
}
/*
* 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, &copy,
len);
err = mic_virtio_copy(mic,
mic->mic_net.virtio_net_fd, &tx_vr,
&copy);
if (err < 0) {
mpsslog("%s %s %d mic_virtio_copy %s\n",
mic->name, __func__, __LINE__,
strerror(errno));
}
if (!err)
verify_out_len(mic, &copy);
#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[1].iov_len = MAX_NET_PKT_SIZE;
} else if (len < 0) {
disp_iovec(mic, &copy, __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(&copy));
}
}
/*
* 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, &copy,
MAX_NET_PKT_SIZE
+ sizeof(struct virtio_net_hdr));
err = mic_virtio_copy(mic,
mic->mic_net.virtio_net_fd, &rx_vr,
&copy);
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, &copy);
#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(&copy)) {
mpsslog("Tun write failed %s ",
strerror(errno));
mpsslog("len 0x%zx ", len);
mpsslog("read_len 0x%zx\n",
sum_iovec_len(&copy));
} 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 (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,
&copy, len);
err = mic_virtio_copy(mic,
mic->mic_console.virtio_console_fd,
&tx_vr, &copy);
if (err < 0) {
mpsslog("%s %s %d mic_virtio_copy %s\n",
mic->name, __func__, __LINE__,
strerror(errno));
}
if (!err)
verify_out_len(mic, &copy);
#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, &copy, __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(&copy));
}
}
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,
&copy, PAGE_SIZE);
err = mic_virtio_copy(mic,
mic->mic_console.virtio_console_fd,
&rx_vr, &copy);
if (!err) {
/* Set the correct output iov_len */
iov1->iov_len = copy.out_len;
verify_out_len(mic, &copy);
#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(&copy)) {
mpsslog("Tun write failed %s ",
strerror(errno));
mpsslog("len 0x%zx ", len);
mpsslog("read_len 0x%zx\n",
sum_iovec_len(&copy));
} 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);
return true;
}
static bool
open_backend(struct mic_info *mic)
{
if (!set_backend_file(mic))
goto _error_exit;
mic->mic_virtblk.backend = open(mic->mic_virtblk.backend_file, O_RDWR);
if (mic->mic_virtblk.backend < 0) {
mpsslog("%s: can't open: %s\n", mic->name,
mic->mic_virtblk.backend_file);
goto _error_free;
}
if (!set_backend_size(mic))
goto _error_close;
mic->mic_virtblk.backend_addr = mmap(NULL,
mic->mic_virtblk.backend_size,
PROT_READ|PROT_WRITE, MAP_SHARED,
mic->mic_virtblk.backend, 0L);
if (mic->mic_virtblk.backend_addr == MAP_FAILED) {
mpsslog("%s: can't map: %s %s\n",
mic->name, mic->mic_virtblk.backend_file,
strerror(errno));
goto _error_close;
}
return true;
_error_close:
close(mic->mic_virtblk.backend);
_error_free:
free(mic->mic_virtblk.backend_file);
_error_exit:
return false;
}
static void
close_backend(struct mic_info *mic)
{
munmap(mic->mic_virtblk.backend_addr, mic->mic_virtblk.backend_size);
close(mic->mic_virtblk.backend);
free(mic->mic_virtblk.backend_file);
}
static bool
start_virtblk(struct mic_info *mic, struct mic_vring *vring)
{
if (((unsigned long)&virtblk_dev_page.blk_config % 8) != 0) {
mpsslog("%s: blk_config is not 8 byte aligned.\n",
mic->name);
return false;
}
add_virtio_device(mic, &virtblk_dev_page.dd);
if (MAP_FAILED == init_vr(mic, mic->mic_virtblk.virtio_block_fd,
VIRTIO_ID_BLOCK, vring, NULL,
virtblk_dev_page.dd.num_vq)) {
mpsslog("%s init_vr failed %s\n",
mic->name, strerror(errno));
return false;
}
return true;
}
static void
stop_virtblk(struct mic_info *mic)
{
int vr_size, ret;
vr_size = PAGE_ALIGN(_vring_size(MIC_VRING_ENTRIES,
MIC_VIRTIO_RING_ALIGN) +
sizeof(struct _mic_vring_info));
ret = munmap(mic->mic_virtblk.block_dp,
MIC_DEVICE_PAGE_END + vr_size * virtblk_dev_page.dd.num_vq);
if (ret < 0)
mpsslog("%s munmap errno %d\n", mic->name, errno);
close(mic->mic_virtblk.virtio_block_fd);
}
static __u8
header_error_check(struct vring_desc *desc)
{
if (le32toh(desc->len) != sizeof(struct virtio_blk_outhdr)) {
mpsslog("%s() %d: length is not sizeof(virtio_blk_outhd)\n",
__func__, __LINE__);
return -EIO;
}
if (!(le16toh(desc->flags) & VRING_DESC_F_NEXT)) {
mpsslog("%s() %d: alone\n",
__func__, __LINE__);
return -EIO;
}
if (le16toh(desc->flags) & VRING_DESC_F_WRITE) {
mpsslog("%s() %d: not read\n",
__func__, __LINE__);
return -EIO;
}
return 0;
}
static int
read_header(int fd, struct virtio_blk_outhdr *hdr, __u32 desc_idx)
{
struct iovec iovec;
struct mic_copy_desc copy;
iovec.iov_len = sizeof(*hdr);
iovec.iov_base = hdr;
copy.iov = &iovec;
copy.iovcnt = 1;
copy.vr_idx = 0; /* only one vring on virtio_block */
copy.update_used = false; /* do not update used index */
return ioctl(fd, MIC_VIRTIO_COPY_DESC, &copy);
}
static int
transfer_blocks(int fd, struct iovec *iovec, __u32 iovcnt)
{
struct mic_copy_desc copy;
copy.iov = iovec;
copy.iovcnt = iovcnt;
copy.vr_idx = 0; /* only one vring on virtio_block */
copy.update_used = false; /* do not update used index */
return ioctl(fd, MIC_VIRTIO_COPY_DESC, &copy);
}
static __u8
status_error_check(struct vring_desc *desc)
{
if (le32toh(desc->len) != sizeof(__u8)) {
mpsslog("%s() %d: length is not sizeof(status)\n",
__func__, __LINE__);
return -EIO;
}
return 0;
}
static int
write_status(int fd, __u8 *status)
{
struct iovec iovec;
struct mic_copy_desc copy;
iovec.iov_base = status;
iovec.iov_len = sizeof(*status);
copy.iov = &iovec;
copy.iovcnt = 1;
copy.vr_idx = 0; /* only one vring on virtio_block */
copy.update_used = true; /* Update used index */
return ioctl(fd, MIC_VIRTIO_COPY_DESC, &copy);
}
#ifndef VIRTIO_BLK_T_GET_ID
#define VIRTIO_BLK_T_GET_ID 8
#endif
static void *
virtio_block(void *arg)
{
struct mic_info *mic = (struct mic_info *)arg;
int ret;
struct pollfd block_poll;
struct mic_vring vring;
__u16 avail_idx;
__u32 desc_idx;
struct vring_desc *desc;
struct iovec *iovec, *piov;
__u8 status;
__u32 buffer_desc_idx;
struct virtio_blk_outhdr hdr;
void *fos;
for (;;) { /* forever */
if (!open_backend(mic)) { /* No virtblk */
for (mic->mic_virtblk.signaled = 0;
!mic->mic_virtblk.signaled;)
sleep(1);
continue;
}
/* backend file is specified. */
if (!start_virtblk(mic, &vring))
goto _close_backend;
iovec = malloc(sizeof(*iovec) *
le32toh(virtblk_dev_page.blk_config.seg_max));
if (!iovec) {
mpsslog("%s: can't alloc iovec: %s\n",
mic->name, strerror(ENOMEM));
goto _stop_virtblk;
}
block_poll.fd = mic->mic_virtblk.virtio_block_fd;
block_poll.events = POLLIN;
for (mic->mic_virtblk.signaled = 0;
!mic->mic_virtblk.signaled;) {
block_poll.revents = 0;
/* timeout in 1 sec to see signaled */
ret = poll(&block_poll, 1, 1000);
if (ret < 0) {
mpsslog("%s %d: poll failed: %s\n",
__func__, __LINE__,
strerror(errno));
continue;
}
if (!(block_poll.revents & POLLIN)) {
#ifdef DEBUG
mpsslog("%s %d: block_poll.revents=0x%x\n",
__func__, __LINE__, block_poll.revents);
#endif
continue;
}
/* POLLIN */
while (vring.info->avail_idx !=
le16toh(vring.vr.avail->idx)) {
/* read header element */
avail_idx =
vring.info->avail_idx &
(vring.vr.num - 1);
desc_idx = le16toh(
vring.vr.avail->ring[avail_idx]);
desc = &vring.vr.desc[desc_idx];
#ifdef DEBUG
mpsslog("%s() %d: avail_idx=%d ",
__func__, __LINE__,
vring.info->avail_idx);
mpsslog("vring.vr.num=%d desc=%p\n",
vring.vr.num, desc);
#endif
status = header_error_check(desc);
ret = read_header(
mic->mic_virtblk.virtio_block_fd,
&hdr, desc_idx);
if (ret < 0) {
mpsslog("%s() %d %s: ret=%d %s\n",
__func__, __LINE__,
mic->name, ret,
strerror(errno));
break;
}
/* buffer element */
piov = iovec;
status = 0;
fos = mic->mic_virtblk.backend_addr +
(hdr.sector * SECTOR_SIZE);
buffer_desc_idx = next_desc(desc);
desc_idx = buffer_desc_idx;
for (desc = &vring.vr.desc[buffer_desc_idx];
desc->flags & VRING_DESC_F_NEXT;
desc_idx = next_desc(desc),
desc = &vring.vr.desc[desc_idx]) {
piov->iov_len = desc->len;
piov->iov_base = fos;
piov++;
fos += desc->len;
}
/* Returning NULLs for VIRTIO_BLK_T_GET_ID. */
if (hdr.type & ~(VIRTIO_BLK_T_OUT |
VIRTIO_BLK_T_GET_ID)) {
/*
VIRTIO_BLK_T_IN - does not do
anything. Probably for documenting.
VIRTIO_BLK_T_SCSI_CMD - for
virtio_scsi.
VIRTIO_BLK_T_FLUSH - turned off in
config space.
VIRTIO_BLK_T_BARRIER - defined but not
used in anywhere.
*/
mpsslog("%s() %d: type %x ",
__func__, __LINE__,
hdr.type);
mpsslog("is not supported\n");
status = -ENOTSUP;
} else {
ret = transfer_blocks(
mic->mic_virtblk.virtio_block_fd,
iovec,
piov - iovec);
if (ret < 0 &&
status != 0)
status = ret;
}
/* write status and update used pointer */
if (status != 0)
status = status_error_check(desc);
ret = write_status(
mic->mic_virtblk.virtio_block_fd,
&status);
#ifdef DEBUG
mpsslog("%s() %d: write status=%d on desc=%p\n",
__func__, __LINE__,
status, desc);
#endif
}
}
free(iovec);
_stop_virtblk:
stop_virtblk(mic);
_close_backend:
close_backend(mic);
} /* forever */
pthread_exit(NULL);
}
static void
reset(struct mic_info *mic)
{
#define RESET_TIMEOUT 120
int i = RESET_TIMEOUT;
setsysfs(mic->name, "state", "reset");
while (i) {
char *state;
state = readsysfs(mic->name, "state");
if (!state)
goto retry;
mpsslog("%s: %s %d state %s\n",
mic->name, __func__, __LINE__, state);
if (!strcmp(state, "ready")) {
free(state);
break;
}
free(state);
retry:
sleep(1);
i--;
}
}
static int
get_mic_shutdown_status(struct mic_info *mic, char *shutdown_status)
{
if (!strcmp(shutdown_status, "nop"))
return MIC_NOP;
if (!strcmp(shutdown_status, "crashed"))
return MIC_CRASHED;
if (!strcmp(shutdown_status, "halted"))
return MIC_HALTED;
if (!strcmp(shutdown_status, "poweroff"))
return MIC_POWER_OFF;
if (!strcmp(shutdown_status, "restart"))
return MIC_RESTART;
mpsslog("%s: BUG invalid status %s\n", mic->name, shutdown_status);
/* Invalid state */
assert(0);
};
static int get_mic_state(struct mic_info *mic)
{
char *state = NULL;
enum mic_states mic_state;
while (!state) {
state = readsysfs(mic->name, "state");
sleep(1);
}
mpsslog("%s: %s %d state %s\n",
mic->name, __func__, __LINE__, state);
if (!strcmp(state, "ready")) {
mic_state = MIC_READY;
} else if (!strcmp(state, "booting")) {
mic_state = MIC_BOOTING;
} else if (!strcmp(state, "online")) {
mic_state = MIC_ONLINE;
} else if (!strcmp(state, "shutting_down")) {
mic_state = MIC_SHUTTING_DOWN;
} else if (!strcmp(state, "reset_failed")) {
mic_state = MIC_RESET_FAILED;
} else if (!strcmp(state, "resetting")) {
mic_state = MIC_RESETTING;
} else {
mpsslog("%s: BUG invalid state %s\n", mic->name, state);
assert(0);
}
free(state);
return mic_state;
};
static void mic_handle_shutdown(struct mic_info *mic)
{
#define SHUTDOWN_TIMEOUT 60
int i = SHUTDOWN_TIMEOUT;
char *shutdown_status;
while (i) {
shutdown_status = readsysfs(mic->name, "shutdown_status");
if (!shutdown_status) {
sleep(1);
continue;
}
mpsslog("%s: %s %d shutdown_status %s\n",
mic->name, __func__, __LINE__, shutdown_status);
switch (get_mic_shutdown_status(mic, shutdown_status)) {
case MIC_RESTART:
mic->restart = 1;
case MIC_HALTED:
case MIC_POWER_OFF:
case MIC_CRASHED:
free(shutdown_status);
goto reset;
default:
break;
}
free(shutdown_status);
sleep(1);
i--;
}
reset:
if (!i)
mpsslog("%s: %s %d timing out waiting for shutdown_status %s\n",
mic->name, __func__, __LINE__, shutdown_status);
reset(mic);
}
static int open_state_fd(struct mic_info *mic)
{
char pathname[PATH_MAX];
int fd;
snprintf(pathname, PATH_MAX - 1, "%s/%s/%s",
MICSYSFSDIR, mic->name, "state");
fd = open(pathname, O_RDONLY);
if (fd < 0)
mpsslog("%s: opening file %s failed %s\n",
mic->name, pathname, strerror(errno));
return fd;
}
static int block_till_state_change(int fd, struct mic_info *mic)
{
struct pollfd ufds[1];
char value[PAGE_SIZE];
int ret;
ufds[0].fd = fd;
ufds[0].events = POLLERR | POLLPRI;
ret = poll(ufds, 1, -1);
if (ret < 0) {
mpsslog("%s: %s %d poll failed %s\n",
mic->name, __func__, __LINE__, strerror(errno));
return ret;
}
ret = lseek(fd, 0, SEEK_SET);
if (ret < 0) {
mpsslog("%s: %s %d Failed to seek to 0: %s\n",
mic->name, __func__, __LINE__, strerror(errno));
return ret;
}
ret = read(fd, value, sizeof(value));
if (ret < 0) {
mpsslog("%s: %s %d Failed to read sysfs entry: %s\n",
mic->name, __func__, __LINE__, strerror(errno));
return ret;
}
return 0;
}
static void *
mic_config(void *arg)
{
struct mic_info *mic = (struct mic_info *)arg;
int fd, ret, stat = 0;
fd = open_state_fd(mic);
if (fd < 0) {
mpsslog("%s: %s %d open state fd failed %s\n",
mic->name, __func__, __LINE__, strerror(errno));
goto exit;
}
do {
ret = block_till_state_change(fd, mic);
if (ret < 0) {
mpsslog("%s: %s %d block_till_state_change error %s\n",
mic->name, __func__, __LINE__, strerror(errno));
goto close_exit;
}
switch (get_mic_state(mic)) {
case MIC_SHUTTING_DOWN:
mic_handle_shutdown(mic);
break;
case MIC_READY:
case MIC_RESET_FAILED:
ret = kill(mic->pid, SIGTERM);
mpsslog("%s: %s %d kill pid %d ret %d\n",
mic->name, __func__, __LINE__,
mic->pid, ret);
if (!ret) {
ret = waitpid(mic->pid, &stat,
WIFSIGNALED(stat));
mpsslog("%s: %s %d waitpid ret %d pid %d\n",
mic->name, __func__, __LINE__,
ret, mic->pid);
}
if (mic->boot_on_resume) {
setsysfs(mic->name, "state", "boot");
mic->boot_on_resume = 0;
}
goto close_exit;
default:
break;
}
} while (1);
close_exit:
close(fd);
exit:
init_mic(mic);
pthread_exit(NULL);
}
static void
set_cmdline(struct mic_info *mic)
{
char buffer[PATH_MAX];
int len;
len = snprintf(buffer, PATH_MAX,
"clocksource=tsc highres=off nohz=off ");
len += snprintf(buffer + len, PATH_MAX - len,
"cpufreq_on;corec6_off;pc3_off;pc6_off ");
len += snprintf(buffer + len, PATH_MAX - len,
"ifcfg=static;address,172.31.%d.1;netmask,255.255.255.0",
mic->id + 1);
setsysfs(mic->name, "cmdline", buffer);
mpsslog("%s: Command line: \"%s\"\n", mic->name, buffer);
snprintf(buffer, PATH_MAX, "172.31.%d.1", mic->id + 1);
mpsslog("%s: IPADDR: \"%s\"\n", mic->name, buffer);
}
static void
set_log_buf_info(struct mic_info *mic)
{
int fd;
off_t len;
char system_map[] = "/lib/firmware/mic/System.map";
char *map, *temp, log_buf[17] = {'\0'};
fd = open(system_map, O_RDONLY);
if (fd < 0) {
mpsslog("%s: Opening System.map failed: %d\n",
mic->name, errno);
return;
}
len = lseek(fd, 0, SEEK_END);
if (len < 0) {
mpsslog("%s: Reading System.map size failed: %d\n",
mic->name, errno);
close(fd);
return;
}
map = mmap(NULL, len, PROT_READ, MAP_PRIVATE, fd, 0);
if (map == MAP_FAILED) {
mpsslog("%s: mmap of System.map failed: %d\n",
mic->name, errno);
close(fd);
return;
}
temp = strstr(map, "__log_buf");
if (!temp) {
mpsslog("%s: __log_buf not found: %d\n", mic->name, errno);
munmap(map, len);
close(fd);
return;
}
strncpy(log_buf, temp - 19, 16);
setsysfs(mic->name, "log_buf_addr", log_buf);
mpsslog("%s: log_buf_addr: %s\n", mic->name, log_buf);
temp = strstr(map, "log_buf_len");
if (!temp) {
mpsslog("%s: log_buf_len not found: %d\n", mic->name, errno);
munmap(map, len);
close(fd);
return;
}
strncpy(log_buf, temp - 19, 16);
setsysfs(mic->name, "log_buf_len", log_buf);
mpsslog("%s: log_buf_len: %s\n", mic->name, log_buf);
munmap(map, len);
close(fd);
}
static void
change_virtblk_backend(int x, siginfo_t *siginfo, void *p)
{
struct mic_info *mic;
for (mic = mic_list.next; mic != NULL; mic = mic->next)
mic->mic_virtblk.signaled = 1/* true */;
}
static void
set_mic_boot_params(struct mic_info *mic)
{
set_log_buf_info(mic);
set_cmdline(mic);
}
static void *
init_mic(void *arg)
{
struct mic_info *mic = (struct mic_info *)arg;
struct sigaction ignore = {
.sa_flags = 0,
.sa_handler = SIG_IGN
};
struct sigaction act = {
.sa_flags = SA_SIGINFO,
.sa_sigaction = change_virtblk_backend,
};
char buffer[PATH_MAX];
int err, fd;
/*
* Currently, one virtio block device is supported for each MIC card
* at a time. Any user (or test) can send a SIGUSR1 to the MIC daemon.
* The signal informs the virtio block backend about a change in the
* configuration file which specifies the virtio backend file name on
* the host. Virtio block backend then re-reads the configuration file
* and switches to the new block device. This signalling mechanism may
* not be required once multiple virtio block devices are supported by
* the MIC daemon.
*/
sigaction(SIGUSR1, &ignore, NULL);
retry:
fd = open_state_fd(mic);
if (fd < 0) {
mpsslog("%s: %s %d open state fd failed %s\n",
mic->name, __func__, __LINE__, strerror(errno));
sleep(2);
goto retry;
}
if (mic->restart) {
snprintf(buffer, PATH_MAX, "boot");
setsysfs(mic->name, "state", buffer);
mpsslog("%s restarting mic %d\n",
mic->name, mic->restart);
mic->restart = 0;
}
while (1) {
while (block_till_state_change(fd, mic)) {
mpsslog("%s: %s %d block_till_state_change error %s\n",
mic->name, __func__, __LINE__, strerror(errno));
sleep(2);
continue;
}
if (get_mic_state(mic) == MIC_BOOTING)
break;
}
mic->pid = fork();
switch (mic->pid) {
case 0:
add_virtio_device(mic, &virtcons_dev_page.dd);
add_virtio_device(mic, &virtnet_dev_page.dd);
err = pthread_create(&mic->mic_console.console_thread, NULL,
virtio_console, mic);
if (err)
mpsslog("%s virtcons pthread_create failed %s\n",
mic->name, strerror(err));
err = pthread_create(&mic->mic_net.net_thread, NULL,
virtio_net, mic);
if (err)
mpsslog("%s virtnet pthread_create failed %s\n",
mic->name, strerror(err));
err = pthread_create(&mic->mic_virtblk.block_thread, NULL,
virtio_block, mic);
if (err)
mpsslog("%s virtblk pthread_create failed %s\n",
mic->name, strerror(err));
sigemptyset(&act.sa_mask);
err = sigaction(SIGUSR1, &act, NULL);
if (err)
mpsslog("%s sigaction SIGUSR1 failed %s\n",
mic->name, strerror(errno));
while (1)
sleep(60);
case -1:
mpsslog("fork failed MIC name %s id %d errno %d\n",
mic->name, mic->id, errno);
break;
default:
err = pthread_create(&mic->config_thread, NULL,
mic_config, mic);
if (err)
mpsslog("%s mic_config pthread_create failed %s\n",
mic->name, strerror(err));
}
return NULL;
}
static void
start_daemon(void)
{
struct mic_info *mic;
int err;
for (mic = mic_list.next; mic; mic = mic->next) {
set_mic_boot_params(mic);
err = pthread_create(&mic->init_thread, NULL, init_mic, mic);
if (err)
mpsslog("%s init_mic pthread_create failed %s\n",
mic->name, strerror(err));
}
while (1)
sleep(60);
}
static int
init_mic_list(void)
{
struct mic_info *mic = &mic_list;
struct dirent *file;
DIR *dp;
int cnt = 0;
dp = opendir(MICSYSFSDIR);
if (!dp)
return 0;
while ((file = readdir(dp)) != NULL) {
if (!strncmp(file->d_name, "mic", 3)) {
mic->next = calloc(1, sizeof(struct mic_info));
if (mic->next) {
mic = mic->next;
mic->id = atoi(&file->d_name[3]);
mic->name = malloc(strlen(file->d_name) + 16);
if (mic->name)
strcpy(mic->name, file->d_name);
mpsslog("MIC name %s id %d\n", mic->name,
mic->id);
cnt++;
}
}
}
closedir(dp);
return cnt;
}
void
mpsslog(char *format, ...)
{
va_list args;
char buffer[4096];
char ts[52], *ts1;
time_t t;
if (logfp == NULL)
return;
va_start(args, format);
vsprintf(buffer, format, args);
va_end(args);
time(&t);
ts1 = ctime_r(&t, ts);
ts1[strlen(ts1) - 1] = '\0';
fprintf(logfp, "%s: %s", ts1, buffer);
fflush(logfp);
}
int
main(int argc, char *argv[])
{
int cnt;
pid_t pid;
myname = argv[0];
logfp = fopen(LOGFILE_NAME, "a+");
if (!logfp) {
fprintf(stderr, "cannot open logfile '%s'\n", LOGFILE_NAME);
exit(1);
}
pid = fork();
switch (pid) {
case 0:
break;
case -1:
exit(2);
default:
exit(0);
}
mpsslog("MIC Daemon start\n");
cnt = init_mic_list();
if (cnt == 0) {
mpsslog("MIC module not loaded\n");
exit(3);
}
mpsslog("MIC found %d devices\n", cnt);
start_daemon();
exit(0);
}
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