blob: 7c4804adc17195675eaad8a101488a9746ab2ecf [file] [log] [blame]
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <unistd.h>
#include <limits.h>
#include <errno.h>
#include <fcntl.h>
#include <sys/poll.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/un.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <syslog.h>
#include <signal.h>
#include "fio.h"
#include "server.h"
#include "crc/crc16.h"
#include "lib/ieee754.h"
#include "fio_version.h"
int fio_net_port = 8765;
int exit_backend = 0;
static int server_fd = -1;
static char *fio_server_arg;
static char *bind_sock;
static struct sockaddr_in saddr_in;
static int first_cmd_check;
static const char *fio_server_ops[FIO_NET_CMD_NR] = {
"",
"QUIT",
"EXIT",
"JOB",
"JOBLINE",
"TEXT",
"TS",
"GS",
"SEND_ETA",
"ETA",
"PROBE",
"START",
"STOP",
"DISK_UTIL",
"RUN",
};
const char *fio_server_op(unsigned int op)
{
static char buf[32];
if (op < FIO_NET_CMD_NR)
return fio_server_ops[op];
sprintf(buf, "UNKNOWN/%d", op);
return buf;
}
int fio_send_data(int sk, const void *p, unsigned int len)
{
assert(len <= sizeof(struct fio_net_cmd) + FIO_SERVER_MAX_PDU);
do {
int ret = send(sk, p, len, 0);
if (ret > 0) {
len -= ret;
if (!len)
break;
p += ret;
continue;
} else if (!ret)
break;
else if (errno == EAGAIN || errno == EINTR)
continue;
else
break;
} while (!exit_backend);
if (!len)
return 0;
return 1;
}
int fio_recv_data(int sk, void *p, unsigned int len)
{
do {
int ret = recv(sk, p, len, MSG_WAITALL);
if (ret > 0) {
len -= ret;
if (!len)
break;
p += ret;
continue;
} else if (!ret)
break;
else if (errno == EAGAIN || errno == EINTR)
continue;
else
break;
} while (!exit_backend);
if (!len)
return 0;
return -1;
}
static int verify_convert_cmd(struct fio_net_cmd *cmd)
{
uint16_t crc;
cmd->cmd_crc16 = le16_to_cpu(cmd->cmd_crc16);
cmd->pdu_crc16 = le16_to_cpu(cmd->pdu_crc16);
crc = crc16(cmd, FIO_NET_CMD_CRC_SZ);
if (crc != cmd->cmd_crc16) {
log_err("fio: server bad crc on command (got %x, wanted %x)\n",
cmd->cmd_crc16, crc);
return 1;
}
cmd->version = le16_to_cpu(cmd->version);
cmd->opcode = le16_to_cpu(cmd->opcode);
cmd->flags = le32_to_cpu(cmd->flags);
cmd->tag = le64_to_cpu(cmd->tag);
cmd->pdu_len = le32_to_cpu(cmd->pdu_len);
switch (cmd->version) {
case FIO_SERVER_VER:
break;
default:
log_err("fio: bad server cmd version %d\n", cmd->version);
return 1;
}
if (cmd->pdu_len > FIO_SERVER_MAX_PDU) {
log_err("fio: command payload too large: %u\n", cmd->pdu_len);
return 1;
}
return 0;
}
/*
* Read (and defragment, if necessary) incoming commands
*/
struct fio_net_cmd *fio_net_recv_cmd(int sk)
{
struct fio_net_cmd cmd, *cmdret = NULL;
size_t cmd_size = 0, pdu_offset = 0;
uint16_t crc;
int ret, first = 1;
void *pdu = NULL;
do {
ret = fio_recv_data(sk, &cmd, sizeof(cmd));
if (ret)
break;
/* We have a command, verify it and swap if need be */
ret = verify_convert_cmd(&cmd);
if (ret)
break;
if (first) {
/* if this is text, add room for \0 at the end */
cmd_size = sizeof(cmd) + cmd.pdu_len + 1;
assert(!cmdret);
} else
cmd_size += cmd.pdu_len;
cmdret = realloc(cmdret, cmd_size);
if (first)
memcpy(cmdret, &cmd, sizeof(cmd));
else if (cmdret->opcode != cmd.opcode) {
log_err("fio: fragment opcode mismatch (%d != %d)\n",
cmdret->opcode, cmd.opcode);
ret = 1;
break;
}
if (!cmd.pdu_len)
break;
/* There's payload, get it */
pdu = (void *) cmdret->payload + pdu_offset;
ret = fio_recv_data(sk, pdu, cmd.pdu_len);
if (ret)
break;
/* Verify payload crc */
crc = crc16(pdu, cmd.pdu_len);
if (crc != cmd.pdu_crc16) {
log_err("fio: server bad crc on payload ");
log_err("(got %x, wanted %x)\n", cmd.pdu_crc16, crc);
ret = 1;
break;
}
pdu_offset += cmd.pdu_len;
if (!first)
cmdret->pdu_len += cmd.pdu_len;
first = 0;
} while (cmd.flags & FIO_NET_CMD_F_MORE);
if (ret) {
free(cmdret);
cmdret = NULL;
} else if (cmdret) {
/* zero-terminate text input */
if (cmdret->pdu_len && (cmdret->opcode == FIO_NET_CMD_TEXT ||
cmdret->opcode == FIO_NET_CMD_JOB)) {
char *buf = (char *) cmdret->payload;
buf[cmdret->pdu_len ] = '\0';
}
/* frag flag is internal */
cmdret->flags &= ~FIO_NET_CMD_F_MORE;
}
return cmdret;
}
void fio_net_cmd_crc(struct fio_net_cmd *cmd)
{
uint32_t pdu_len;
cmd->cmd_crc16 = __cpu_to_le16(crc16(cmd, FIO_NET_CMD_CRC_SZ));
pdu_len = le32_to_cpu(cmd->pdu_len);
if (pdu_len)
cmd->pdu_crc16 = __cpu_to_le16(crc16(cmd->payload, pdu_len));
}
int fio_net_send_cmd(int fd, uint16_t opcode, const void *buf, off_t size,
uint64_t tag)
{
struct fio_net_cmd *cmd = NULL;
size_t this_len, cur_len = 0;
int ret;
do {
this_len = size;
if (this_len > FIO_SERVER_MAX_PDU)
this_len = FIO_SERVER_MAX_PDU;
if (!cmd || cur_len < sizeof(*cmd) + this_len) {
if (cmd)
free(cmd);
cur_len = sizeof(*cmd) + this_len;
cmd = malloc(cur_len);
}
fio_init_net_cmd(cmd, opcode, buf, this_len, tag);
if (this_len < size)
cmd->flags = __cpu_to_le32(FIO_NET_CMD_F_MORE);
fio_net_cmd_crc(cmd);
ret = fio_send_data(fd, cmd, sizeof(*cmd) + this_len);
size -= this_len;
buf += this_len;
} while (!ret && size);
if (cmd)
free(cmd);
return ret;
}
static int fio_net_send_simple_stack_cmd(int sk, uint16_t opcode, uint64_t tag)
{
struct fio_net_cmd cmd;
fio_init_net_cmd(&cmd, opcode, NULL, 0, tag);
fio_net_cmd_crc(&cmd);
return fio_send_data(sk, &cmd, sizeof(cmd));
}
/*
* If 'list' is non-NULL, then allocate and store the sent command for
* later verification.
*/
int fio_net_send_simple_cmd(int sk, uint16_t opcode, uint64_t tag,
struct flist_head *list)
{
struct fio_net_int_cmd *cmd;
int ret;
if (!list)
return fio_net_send_simple_stack_cmd(sk, opcode, tag);
cmd = malloc(sizeof(*cmd));
fio_init_net_cmd(&cmd->cmd, opcode, NULL, 0, (uintptr_t) cmd);
fio_net_cmd_crc(&cmd->cmd);
INIT_FLIST_HEAD(&cmd->list);
gettimeofday(&cmd->tv, NULL);
cmd->saved_tag = tag;
ret = fio_send_data(sk, &cmd->cmd, sizeof(cmd->cmd));
if (ret) {
free(cmd);
return ret;
}
flist_add_tail(&cmd->list, list);
return 0;
}
static int fio_server_send_quit_cmd(void)
{
dprint(FD_NET, "server: sending quit\n");
return fio_net_send_simple_cmd(server_fd, FIO_NET_CMD_QUIT, 0, NULL);
}
static int handle_job_cmd(struct fio_net_cmd *cmd)
{
char *buf = (char *) cmd->payload;
int ret;
if (parse_jobs_ini(buf, 1, 0)) {
fio_server_send_quit_cmd();
return -1;
}
fio_net_send_simple_cmd(server_fd, FIO_NET_CMD_START, 0, NULL);
ret = exec_run();
fio_server_send_quit_cmd();
reset_fio_state();
return ret;
}
static int handle_jobline_cmd(struct fio_net_cmd *cmd)
{
void *pdu = cmd->payload;
struct cmd_single_line_pdu *cslp;
struct cmd_line_pdu *clp;
unsigned long offset;
char **argv;
int ret, i;
clp = pdu;
clp->lines = le16_to_cpu(clp->lines);
argv = malloc(clp->lines * sizeof(char *));
offset = sizeof(*clp);
dprint(FD_NET, "server: %d command line args\n", clp->lines);
for (i = 0; i < clp->lines; i++) {
cslp = pdu + offset;
argv[i] = (char *) cslp->text;
offset += sizeof(*cslp) + le16_to_cpu(cslp->len);
dprint(FD_NET, "server: %d: %s\n", i, argv[i]);
}
if (parse_cmd_line(clp->lines, argv)) {
fio_server_send_quit_cmd();
free(argv);
return -1;
}
free(argv);
fio_net_send_simple_cmd(server_fd, FIO_NET_CMD_START, 0, NULL);
ret = exec_run();
fio_server_send_quit_cmd();
reset_fio_state();
return ret;
}
static int handle_probe_cmd(struct fio_net_cmd *cmd)
{
struct cmd_probe_pdu probe;
dprint(FD_NET, "server: sending probe reply\n");
memset(&probe, 0, sizeof(probe));
gethostname((char *) probe.hostname, sizeof(probe.hostname));
#ifdef FIO_BIG_ENDIAN
probe.bigendian = 1;
#endif
probe.fio_major = FIO_MAJOR;
probe.fio_minor = FIO_MINOR;
probe.fio_patch = FIO_PATCH;
probe.os = FIO_OS;
probe.arch = FIO_ARCH;
probe.bpp = sizeof(void *);
return fio_net_send_cmd(server_fd, FIO_NET_CMD_PROBE, &probe, sizeof(probe), cmd->tag);
}
static int handle_send_eta_cmd(struct fio_net_cmd *cmd)
{
struct jobs_eta *je;
size_t size;
int i;
if (!thread_number)
return 0;
size = sizeof(*je) + thread_number * sizeof(char) + 1;
je = malloc(size);
memset(je, 0, size);
if (!calc_thread_status(je, 1)) {
free(je);
return 0;
}
dprint(FD_NET, "server sending status\n");
je->nr_running = cpu_to_le32(je->nr_running);
je->nr_ramp = cpu_to_le32(je->nr_ramp);
je->nr_pending = cpu_to_le32(je->nr_pending);
je->files_open = cpu_to_le32(je->files_open);
je->m_rate = cpu_to_le32(je->m_rate);
je->t_rate = cpu_to_le32(je->t_rate);
je->m_iops = cpu_to_le32(je->m_iops);
je->t_iops = cpu_to_le32(je->t_iops);
for (i = 0; i < 2; i++) {
je->rate[i] = cpu_to_le32(je->rate[i]);
je->iops[i] = cpu_to_le32(je->iops[i]);
}
je->elapsed_sec = cpu_to_le32(je->nr_running);
je->eta_sec = cpu_to_le64(je->eta_sec);
fio_net_send_cmd(server_fd, FIO_NET_CMD_ETA, je, size, cmd->tag);
free(je);
return 0;
}
static int handle_command(struct fio_net_cmd *cmd)
{
int ret;
dprint(FD_NET, "server: got op [%s], pdu=%u, tag=%lx\n",
fio_server_op(cmd->opcode), cmd->pdu_len, cmd->tag);
switch (cmd->opcode) {
case FIO_NET_CMD_QUIT:
fio_terminate_threads(TERMINATE_ALL);
return -1;
case FIO_NET_CMD_EXIT:
exit_backend = 1;
return -1;
case FIO_NET_CMD_JOB:
ret = handle_job_cmd(cmd);
break;
case FIO_NET_CMD_JOBLINE:
ret = handle_jobline_cmd(cmd);
break;
case FIO_NET_CMD_PROBE:
ret = handle_probe_cmd(cmd);
break;
case FIO_NET_CMD_SEND_ETA:
ret = handle_send_eta_cmd(cmd);
break;
default:
log_err("fio: unknown opcode: %s\n",fio_server_op(cmd->opcode));
ret = 1;
}
return ret;
}
static int handle_connection(int sk, int block)
{
struct fio_net_cmd *cmd = NULL;
int ret = 0;
/* read forever */
while (!exit_backend) {
struct pollfd pfd = {
.fd = sk,
.events = POLLIN,
};
ret = 0;
do {
ret = poll(&pfd, 1, 100);
if (ret < 0) {
if (errno == EINTR)
break;
log_err("fio: poll: %s\n", strerror(errno));
break;
} else if (!ret) {
if (!block)
return 0;
continue;
}
if (pfd.revents & POLLIN)
break;
if (pfd.revents & (POLLERR|POLLHUP)) {
ret = 1;
break;
}
} while (!exit_backend);
if (ret < 0)
break;
cmd = fio_net_recv_cmd(sk);
if (!cmd) {
ret = -1;
break;
}
ret = handle_command(cmd);
if (ret)
break;
free(cmd);
cmd = NULL;
}
if (cmd)
free(cmd);
return ret;
}
void fio_server_idle_loop(void)
{
if (!first_cmd_check)
fio_net_send_simple_cmd(server_fd, FIO_NET_CMD_RUN, 0, NULL);
if (server_fd != -1)
handle_connection(server_fd, 0);
}
static int accept_loop(int listen_sk)
{
struct sockaddr_in addr;
fio_socklen_t len = sizeof(addr);
struct pollfd pfd;
int ret, sk, flags, exitval = 0;
dprint(FD_NET, "server enter accept loop\n");
flags = fcntl(listen_sk, F_GETFL);
flags |= O_NONBLOCK;
fcntl(listen_sk, F_SETFL, flags);
again:
pfd.fd = listen_sk;
pfd.events = POLLIN;
do {
ret = poll(&pfd, 1, 100);
if (ret < 0) {
if (errno == EINTR)
break;
log_err("fio: poll: %s\n", strerror(errno));
goto out;
} else if (!ret)
continue;
if (pfd.revents & POLLIN)
break;
} while (!exit_backend);
if (exit_backend)
goto out;
sk = accept(listen_sk, (struct sockaddr *) &addr, &len);
if (sk < 0) {
log_err("fio: accept: %s\n", strerror(errno));
return -1;
}
dprint(FD_NET, "server: connect from %s\n", inet_ntoa(addr.sin_addr));
server_fd = sk;
exitval = handle_connection(sk, 1);
server_fd = -1;
close(sk);
if (!exit_backend)
goto again;
out:
return exitval;
}
int fio_server_text_output(const char *buf, size_t len)
{
if (server_fd != -1)
return fio_net_send_cmd(server_fd, FIO_NET_CMD_TEXT, buf, len, 0);
return log_local_buf(buf, len);
}
static void convert_io_stat(struct io_stat *dst, struct io_stat *src)
{
dst->max_val = cpu_to_le64(src->max_val);
dst->min_val = cpu_to_le64(src->min_val);
dst->samples = cpu_to_le64(src->samples);
/*
* Encode to IEEE 754 for network transfer
*/
dst->mean.u.i = __cpu_to_le64(fio_double_to_uint64(src->mean.u.f));
dst->S.u.i = __cpu_to_le64(fio_double_to_uint64(src->S.u.f));
}
static void convert_gs(struct group_run_stats *dst, struct group_run_stats *src)
{
int i;
for (i = 0; i < 2; i++) {
dst->max_run[i] = cpu_to_le64(src->max_run[i]);
dst->min_run[i] = cpu_to_le64(src->min_run[i]);
dst->max_bw[i] = cpu_to_le64(src->max_bw[i]);
dst->min_bw[i] = cpu_to_le64(src->min_bw[i]);
dst->io_kb[i] = cpu_to_le64(src->io_kb[i]);
dst->agg[i] = cpu_to_le64(src->agg[i]);
}
dst->kb_base = cpu_to_le32(src->kb_base);
dst->groupid = cpu_to_le32(src->groupid);
}
/*
* Send a CMD_TS, which packs struct thread_stat and group_run_stats
* into a single payload.
*/
void fio_server_send_ts(struct thread_stat *ts, struct group_run_stats *rs)
{
struct cmd_ts_pdu p;
int i, j;
dprint(FD_NET, "server sending end stats\n");
memset(&p, 0, sizeof(p));
strcpy(p.ts.name, ts->name);
strcpy(p.ts.verror, ts->verror);
strcpy(p.ts.description, ts->description);
p.ts.error = cpu_to_le32(ts->error);
p.ts.groupid = cpu_to_le32(ts->groupid);
p.ts.pid = cpu_to_le32(ts->pid);
p.ts.members = cpu_to_le32(ts->members);
for (i = 0; i < 2; i++) {
convert_io_stat(&p.ts.clat_stat[i], &ts->clat_stat[i]);
convert_io_stat(&p.ts.slat_stat[i], &ts->slat_stat[i]);
convert_io_stat(&p.ts.lat_stat[i], &ts->lat_stat[i]);
convert_io_stat(&p.ts.bw_stat[i], &ts->bw_stat[i]);
}
p.ts.usr_time = cpu_to_le64(ts->usr_time);
p.ts.sys_time = cpu_to_le64(ts->sys_time);
p.ts.ctx = cpu_to_le64(ts->ctx);
p.ts.minf = cpu_to_le64(ts->minf);
p.ts.majf = cpu_to_le64(ts->majf);
p.ts.clat_percentiles = cpu_to_le64(ts->clat_percentiles);
for (i = 0; i < FIO_IO_U_LIST_MAX_LEN; i++) {
fio_fp64_t *src = &ts->percentile_list[i];
fio_fp64_t *dst = &p.ts.percentile_list[i];
dst->u.i = __cpu_to_le64(fio_double_to_uint64(src->u.f));
}
for (i = 0; i < FIO_IO_U_MAP_NR; i++) {
p.ts.io_u_map[i] = cpu_to_le32(ts->io_u_map[i]);
p.ts.io_u_submit[i] = cpu_to_le32(ts->io_u_submit[i]);
p.ts.io_u_complete[i] = cpu_to_le32(ts->io_u_complete[i]);
}
for (i = 0; i < FIO_IO_U_LAT_U_NR; i++) {
p.ts.io_u_lat_u[i] = cpu_to_le32(ts->io_u_lat_u[i]);
p.ts.io_u_lat_m[i] = cpu_to_le32(ts->io_u_lat_m[i]);
}
for (i = 0; i < 2; i++)
for (j = 0; j < FIO_IO_U_PLAT_NR; j++)
p.ts.io_u_plat[i][j] = cpu_to_le32(ts->io_u_plat[i][j]);
for (i = 0; i < 3; i++) {
p.ts.total_io_u[i] = cpu_to_le64(ts->total_io_u[i]);
p.ts.short_io_u[i] = cpu_to_le64(ts->short_io_u[i]);
}
p.ts.total_submit = cpu_to_le64(ts->total_submit);
p.ts.total_complete = cpu_to_le64(ts->total_complete);
for (i = 0; i < 2; i++) {
p.ts.io_bytes[i] = cpu_to_le64(ts->io_bytes[i]);
p.ts.runtime[i] = cpu_to_le64(ts->runtime[i]);
}
p.ts.total_run_time = cpu_to_le64(ts->total_run_time);
p.ts.continue_on_error = cpu_to_le16(ts->continue_on_error);
p.ts.total_err_count = cpu_to_le64(ts->total_err_count);
p.ts.first_error = cpu_to_le32(ts->first_error);
p.ts.kb_base = cpu_to_le32(ts->kb_base);
convert_gs(&p.rs, rs);
fio_net_send_cmd(server_fd, FIO_NET_CMD_TS, &p, sizeof(p), 0);
}
void fio_server_send_gs(struct group_run_stats *rs)
{
struct group_run_stats gs;
dprint(FD_NET, "server sending group run stats\n");
convert_gs(&gs, rs);
fio_net_send_cmd(server_fd, FIO_NET_CMD_GS, &gs, sizeof(gs), 0);
}
static void convert_agg(struct disk_util_agg *dst, struct disk_util_agg *src)
{
int i;
for (i = 0; i < 2; i++) {
dst->ios[i] = cpu_to_le32(src->ios[i]);
dst->merges[i] = cpu_to_le32(src->merges[i]);
dst->sectors[i] = cpu_to_le64(src->sectors[i]);
dst->ticks[i] = cpu_to_le32(src->ticks[i]);
}
dst->io_ticks = cpu_to_le32(src->io_ticks);
dst->time_in_queue = cpu_to_le32(src->time_in_queue);
dst->slavecount = cpu_to_le32(src->slavecount);
dst->max_util.u.i = __cpu_to_le64(fio_double_to_uint64(src->max_util.u.f));
}
static void convert_dus(struct disk_util_stat *dst, struct disk_util_stat *src)
{
int i;
strcpy((char *) dst->name, (char *) src->name);
for (i = 0; i < 2; i++) {
dst->ios[i] = cpu_to_le32(src->ios[i]);
dst->merges[i] = cpu_to_le32(src->merges[i]);
dst->sectors[i] = cpu_to_le64(src->sectors[i]);
dst->ticks[i] = cpu_to_le32(src->ticks[i]);
}
dst->io_ticks = cpu_to_le32(src->io_ticks);
dst->time_in_queue = cpu_to_le32(src->time_in_queue);
dst->msec = cpu_to_le64(src->msec);
}
void fio_server_send_du(void)
{
struct disk_util *du;
struct flist_head *entry;
struct cmd_du_pdu pdu;
dprint(FD_NET, "server: sending disk_util %d\n", !flist_empty(&disk_list));
memset(&pdu, 0, sizeof(pdu));
flist_for_each(entry, &disk_list) {
du = flist_entry(entry, struct disk_util, list);
convert_dus(&pdu.dus, &du->dus);
convert_agg(&pdu.agg, &du->agg);
fio_net_send_cmd(server_fd, FIO_NET_CMD_DU, &pdu, sizeof(pdu), 0);
}
}
int fio_server_log(const char *format, ...)
{
char buffer[1024];
va_list args;
size_t len;
dprint(FD_NET, "server log\n");
va_start(args, format);
len = vsnprintf(buffer, sizeof(buffer), format, args);
va_end(args);
return fio_server_text_output(buffer, len);
}
static int fio_init_server_ip(void)
{
int sk, opt;
sk = socket(AF_INET, SOCK_STREAM, 0);
if (sk < 0) {
log_err("fio: socket: %s\n", strerror(errno));
return -1;
}
opt = 1;
if (setsockopt(sk, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt)) < 0) {
log_err("fio: setsockopt: %s\n", strerror(errno));
close(sk);
return -1;
}
#ifdef SO_REUSEPORT
if (setsockopt(sk, SOL_SOCKET, SO_REUSEPORT, &opt, sizeof(opt)) < 0) {
log_err("fio: setsockopt: %s\n", strerror(errno));
close(sk);
return -1;
}
#endif
saddr_in.sin_family = AF_INET;
if (bind(sk, (struct sockaddr *) &saddr_in, sizeof(saddr_in)) < 0) {
log_err("fio: bind: %s\n", strerror(errno));
close(sk);
return -1;
}
return sk;
}
static int fio_init_server_sock(void)
{
struct sockaddr_un addr;
fio_socklen_t len;
mode_t mode;
int sk;
sk = socket(AF_UNIX, SOCK_STREAM, 0);
if (sk < 0) {
log_err("fio: socket: %s\n", strerror(errno));
return -1;
}
mode = umask(000);
memset(&addr, 0, sizeof(addr));
addr.sun_family = AF_UNIX;
strcpy(addr.sun_path, bind_sock);
unlink(bind_sock);
len = sizeof(addr.sun_family) + strlen(bind_sock) + 1;
if (bind(sk, (struct sockaddr *) &addr, len) < 0) {
log_err("fio: bind: %s\n", strerror(errno));
close(sk);
return -1;
}
umask(mode);
return sk;
}
static int fio_init_server_connection(void)
{
char bind_str[128];
int sk;
dprint(FD_NET, "starting server\n");
if (!bind_sock)
sk = fio_init_server_ip();
else
sk = fio_init_server_sock();
if (sk < 0)
return sk;
if (!bind_sock)
sprintf(bind_str, "%s:%u", inet_ntoa(saddr_in.sin_addr), fio_net_port);
else
strcpy(bind_str, bind_sock);
log_info("fio: server listening on %s\n", bind_str);
if (listen(sk, 0) < 0) {
log_err("fio: listen: %s\n", strerror(errno));
return -1;
}
return sk;
}
int fio_server_parse_string(const char *str, char **ptr, int *is_sock,
int *port, struct in_addr *inp)
{
*ptr = NULL;
*is_sock = 0;
*port = fio_net_port;
if (!strncmp(str, "sock:", 5)) {
*ptr = strdup(str + 5);
*is_sock = 1;
} else {
const char *host = str;
char *portp;
int lport = 0;
/*
* Is it ip:<ip or host>:port
*/
if (!strncmp(host, "ip:", 3))
host += 3;
else if (host[0] == ':') {
/* String is :port */
host++;
lport = atoi(host);
if (!lport || lport > 65535) {
log_err("fio: bad server port %u\n", port);
return 1;
}
/* no hostname given, we are done */
*port = lport;
return 0;
}
/*
* If no port seen yet, check if there's a last ':' at the end
*/
if (!lport) {
portp = strchr(host, ':');
if (portp) {
*portp = '\0';
portp++;
lport = atoi(portp);
if (!lport || lport > 65535) {
log_err("fio: bad server port %u\n", port);
return 1;
}
}
}
if (lport)
*port = lport;
*ptr = strdup(host);
if (inet_aton(host, inp) != 1) {
struct hostent *hent;
hent = gethostbyname(host);
if (!hent) {
free(*ptr);
*ptr = NULL;
return 1;
}
memcpy(inp, hent->h_addr, 4);
}
}
if (*port == 0)
*port = fio_net_port;
return 0;
}
/*
* Server arg should be one of:
*
* sock:/path/to/socket
* ip:1.2.3.4
* 1.2.3.4
*
* Where sock uses unix domain sockets, and ip binds the server to
* a specific interface. If no arguments are given to the server, it
* uses IP and binds to 0.0.0.0.
*
*/
static int fio_handle_server_arg(void)
{
int port = fio_net_port;
int is_sock, ret = 0;
saddr_in.sin_addr.s_addr = htonl(INADDR_ANY);
if (!fio_server_arg)
goto out;
ret = fio_server_parse_string(fio_server_arg, &bind_sock, &is_sock,
&port, &saddr_in.sin_addr);
if (!is_sock && bind_sock) {
free(bind_sock);
bind_sock = NULL;
}
out:
fio_net_port = port;
saddr_in.sin_port = htons(port);
return ret;
}
static int fio_server(void)
{
int sk, ret;
dprint(FD_NET, "starting server\n");
if (fio_handle_server_arg())
return -1;
sk = fio_init_server_connection();
if (sk < 0)
return -1;
ret = accept_loop(sk);
close(sk);
if (fio_server_arg) {
free(fio_server_arg);
fio_server_arg = NULL;
}
if (bind_sock)
free(bind_sock);
return ret;
}
void fio_server_got_signal(int signal)
{
if (signal == SIGPIPE)
server_fd = -1;
else {
log_info("\nfio: terminating on signal %d\n", signal);
exit_backend = 1;
}
}
static int check_existing_pidfile(const char *pidfile)
{
struct stat sb;
char buf[16];
pid_t pid;
FILE *f;
if (stat(pidfile, &sb))
return 0;
f = fopen(pidfile, "r");
if (!f)
return 0;
if (fread(buf, sb.st_size, 1, f) <= 0) {
fclose(f);
return 1;
}
fclose(f);
pid = atoi(buf);
if (kill(pid, SIGCONT) < 0)
return errno != ESRCH;
return 1;
}
static int write_pid(pid_t pid, const char *pidfile)
{
FILE *fpid;
fpid = fopen(pidfile, "w");
if (!fpid) {
log_err("fio: failed opening pid file %s\n", pidfile);
return 1;
}
fprintf(fpid, "%u\n", (unsigned int) pid);
fclose(fpid);
return 0;
}
/*
* If pidfile is specified, background us.
*/
int fio_start_server(char *pidfile)
{
pid_t pid;
int ret;
if (!pidfile)
return fio_server();
if (check_existing_pidfile(pidfile)) {
log_err("fio: pidfile %s exists and server appears alive\n",
pidfile);
return -1;
}
pid = fork();
if (pid < 0) {
log_err("fio: failed server fork: %s", strerror(errno));
free(pidfile);
return -1;
} else if (pid) {
int ret = write_pid(pid, pidfile);
exit(ret);
}
setsid();
openlog("fio", LOG_NDELAY|LOG_NOWAIT|LOG_PID, LOG_USER);
log_syslog = 1;
close(STDIN_FILENO);
close(STDOUT_FILENO);
close(STDERR_FILENO);
f_out = NULL;
f_err = NULL;
ret = fio_server();
closelog();
unlink(pidfile);
free(pidfile);
return ret;
}
void fio_server_set_arg(const char *arg)
{
fio_server_arg = strdup(arg);
}