mirror of
https://github.com/upa/mscp.git
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3d98451bba
This change prevents mscp from establishing too many ssh connections on many-core machines in default.
713 lines
16 KiB
C
713 lines
16 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <stdbool.h>
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#include <unistd.h>
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#include <signal.h>
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#include <sys/time.h>
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#include <sys/ioctl.h>
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#include <math.h>
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#include <pthread.h>
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#include <list.h>
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#include <util.h>
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#include <ssh.h>
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#include <file.h>
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#include <pprint.h>
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#include <atomic.h>
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#include <platform.h>
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#ifndef _VERSION /* passed through cmake */
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#define VERSION "(unknown)"
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#else
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#define VERSION _VERSION
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#endif
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#define DEFAULT_MIN_CHUNK_SZ (64 << 20) /* 64MB */
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#define DEFAULT_NR_AHEAD 32
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#define DEFAULT_BUF_SZ 16384
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/* XXX: we use 16384 byte buffer pointed by
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* https://api.libssh.org/stable/libssh_tutor_sftp.html. The larget
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* read length from sftp_async_read is 65536 byte. Read sizes larger
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* than 65536 cause a situation where data remainds but
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* sftp_async_read returns 0.
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*/
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struct mscp_thread {
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sftp_session sftp;
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pthread_t tid;
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int cpu;
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size_t done; /* copied bytes */
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bool finished;
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int ret;
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};
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struct mscp {
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char *host; /* remote host (and username) */
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struct ssh_opts *opts; /* ssh parameters */
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struct list_head file_list;
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struct list_head chunk_list; /* stack of chunks */
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lock chunk_lock; /* lock for chunk list */
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char *target;
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int nr_threads; /* number of threads */
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int buf_sz; /* i/o buf size */
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int nr_ahead; /* # of ahead read command for remote to local copy */
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struct mscp_thread *threads;
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} m;
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void *mscp_copy_thread(void *arg);
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int mscp_stat_init();
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void mscp_stat_final();
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void stop_copy_threads(int sig)
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{
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int n;
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pr("stopping...\n");
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for (n = 0; n < m.nr_threads; n++) {
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if (m.threads[n].tid && !m.threads[n].finished)
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pthread_cancel(m.threads[n].tid);
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}
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}
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void usage(bool print_help) {
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printf("mscp v" VERSION ": copy files over multiple ssh connections\n"
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"\n"
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"Usage: mscp [vqDCHdNh] [-n nr_conns] [-m coremask]\n"
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" [-s min_chunk_sz] [-S max_chunk_sz] [-a nr_ahead] [-b buf_sz]\n"
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" [-l login_name] [-p port] [-i identity_file]\n"
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" [-c cipher_spec] [-M hmac_spec] source ... target\n"
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"\n");
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if (!print_help)
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return;
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printf(" -n NR_CONNECTIONS number of connections "
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"(default: floor(log(cores)*2)+1)\n"
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" -m COREMASK hex value to specify cores where threads pinned\n"
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" -s MIN_CHUNK_SIZE min chunk size (default: 64MB)\n"
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" -S MAX_CHUNK_SIZE max chunk size (default: filesize/nr_conn)\n"
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"\n"
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" -a NR_AHEAD number of inflight SFTP commands (default: 32)\n"
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" -b BUF_SZ buffer size for i/o and transfer\n"
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"\n"
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" -v increment verbose output level\n"
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" -q disable output\n"
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" -D dry run\n"
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"\n"
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" -l LOGIN_NAME login name\n"
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" -p PORT port number\n"
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" -i IDENTITY identity file for public key authentication\n"
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" -c CIPHER cipher spec\n"
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" -M HMAC hmac spec\n"
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" -C enable compression on libssh\n"
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" -H disable hostkey check\n"
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" -d increment ssh debug output level\n"
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" -N disable tcp nodelay (default on)\n"
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" -h print this help\n"
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"\n");
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}
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char *find_hostname(int ind, int argc, char **argv)
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{
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char *h, *hostnames[argc];
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int n, cnt = 0;
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for (n = ind; n < argc; n++) {
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h = file_find_hostname(argv[n]);
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if (h)
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hostnames[cnt++] = h;
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}
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if (cnt == 0)
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return NULL;
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/* check all hostnames are identical */
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for (n = 1; n < cnt; n++) {
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int s1 = strlen(hostnames[n - 1]);
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int s2 = strlen(hostnames[n]);
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if (s1 != s2) {
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pr_err("different hostnames: %s and %s\n",
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hostnames[n - 1], hostnames[n]);
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goto err_out;
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}
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if (strncmp(hostnames[n - 1], hostnames[n], s1) != 0) {
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pr_err("different hostnames: %s and %s\n",
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hostnames[n - 1], hostnames[n]);
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goto err_out;
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}
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}
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for (n = 1; n < cnt; n++) {
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free(hostnames[n]);
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}
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return hostnames[0];
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err_out:
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for (n = 0; n < cnt; n++) {
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free(hostnames[n]);
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}
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return NULL;
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}
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int expand_coremask(const char *coremask, int **cores, int *nr_cores)
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{
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int n, *core_list, core_list_len = 0, nr_usable, nr_all;
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char c[2] = { 'x', '\0' };
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const char *_coremask;
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long v, needle;
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int ncores = nr_cpus();
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/*
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* This function returns array of usable cores in `cores` and
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* returns the number of usable cores (array length) through
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* nr_cores.
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*/
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if (strncmp(coremask, "0x", 2) == 0)
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_coremask = coremask + 2;
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else
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_coremask = coremask;
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core_list = realloc(NULL, sizeof(int) * 64);
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if (!core_list) {
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pr_err("failed to realloc: %s\n", strerrno());
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return -1;
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}
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nr_usable = 0;
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nr_all = 0;
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for (n = strlen(_coremask) - 1; n >=0; n--) {
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c[0] = _coremask[n];
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v = strtol(c, NULL, 16);
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if (v == LONG_MIN || v == LONG_MAX) {
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pr_err("invalid coremask: %s\n", coremask);
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return -1;
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}
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for (needle = 0x01; needle < 0x10; needle <<= 1) {
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nr_all++;
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if (nr_all > ncores)
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break; /* too long coremask */
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if (v & needle) {
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nr_usable++;
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core_list = realloc(core_list, sizeof(int) * nr_usable);
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if (!core_list) {
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pr_err("failed to realloc: %s\n", strerrno());
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return -1;
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}
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core_list[nr_usable - 1] = nr_all - 1;
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}
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}
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}
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if (nr_usable < 1) {
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pr_err("invalid core mask: %s\n", coremask);
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return -1;
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}
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*cores = core_list;
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*nr_cores = nr_usable;
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return 0;
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}
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int default_nr_threads()
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{
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return (int)(floor(log(nr_cpus()) * 2) + 1);
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}
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int main(int argc, char **argv)
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{
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struct ssh_opts opts;
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sftp_session ctrl;
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int min_chunk_sz = DEFAULT_MIN_CHUNK_SZ;
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int max_chunk_sz = 0;
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char *coremask = NULL;;
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int verbose = 1;
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bool dryrun = false;
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int ret = 0, n;
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int *cores, nr_cores;
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char ch;
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memset(&opts, 0, sizeof(opts));
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opts.nodelay = 1;
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memset(&m, 0, sizeof(m));
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INIT_LIST_HEAD(&m.file_list);
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INIT_LIST_HEAD(&m.chunk_list);
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lock_init(&m.chunk_lock);
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m.nr_ahead = DEFAULT_NR_AHEAD;
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m.buf_sz = DEFAULT_BUF_SZ;
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m.nr_threads = default_nr_threads();
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while ((ch = getopt(argc, argv, "n:m:s:S:a:b:vqDl:p:i:c:M:CHdNh")) != -1) {
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switch (ch) {
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case 'n':
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m.nr_threads = atoi(optarg);
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if (m.nr_threads < 1) {
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pr_err("invalid number of connections: %s\n", optarg);
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return 1;
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}
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break;
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case 'm':
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coremask = optarg;
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break;
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case 's':
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min_chunk_sz = atoi(optarg);
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if (min_chunk_sz < getpagesize()) {
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pr_err("min chunk size must be "
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"larger than or equal to %d: %s\n",
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getpagesize(), optarg);
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return 1;
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}
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if (min_chunk_sz % getpagesize() != 0) {
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pr_err("min chunk size must be "
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"multiple of page size %d: %s\n",
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getpagesize(), optarg);
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return -1;
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}
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break;
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case 'S':
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max_chunk_sz = atoi(optarg);
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if (max_chunk_sz < getpagesize()) {
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pr_err("max chunk size must be "
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"larger than or equal to %d: %s\n",
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getpagesize(), optarg);
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return 1;
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}
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if (max_chunk_sz % getpagesize() != 0) {
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pr_err("max chunk size must be "
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"multiple of page size %d: %s\n",
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getpagesize(), optarg);
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return -1;
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}
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break;
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case 'a':
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m.nr_ahead = atoi(optarg);
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if (m.nr_ahead < 1) {
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pr_err("invalid number of ahead: %s\n", optarg);
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return -1;
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}
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break;
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case 'b':
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m.buf_sz = atoi(optarg);
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if (m.buf_sz < 1) {
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pr_err("invalid buffer size: %s\n", optarg);
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return -1;
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}
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break;
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case 'v':
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verbose++;
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break;
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case 'q':
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verbose = -1;
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break;
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case 'D':
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dryrun = true;
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break;
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case 'l':
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opts.login_name = optarg;
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break;
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case 'p':
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opts.port = optarg;
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break;
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case 'i':
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opts.identity = optarg;
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break;
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case 'c':
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opts.cipher = optarg;
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break;
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case 'M':
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opts.hmac = optarg;
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break;
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case 'C':
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opts.compress++;
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break;
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case 'H':
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opts.no_hostkey_check = true;
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break;
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case 'd':
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opts.debuglevel++;
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break;
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case 'N':
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opts.nodelay = 0;
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break;
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case 'h':
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usage(true);
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return 0;
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default:
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usage(false);
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return 1;
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}
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}
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pprint_set_level(verbose);
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if (argc - optind < 2) {
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/* mscp needs at lease 2 (src and target) argument */
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usage(false);
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return 1;
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}
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m.target = argv[argc - 1];
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if (max_chunk_sz > 0 && min_chunk_sz > max_chunk_sz) {
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pr_err("smaller max chunk size than min chunk size: %d < %d\n",
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max_chunk_sz, min_chunk_sz);
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return 1;
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}
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/* expand usable cores from coremask */
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if (coremask) {
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if (expand_coremask(coremask, &cores, &nr_cores) < 0)
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return -1;
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pprint(2, "cpu cores:");
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for (n = 0; n < nr_cores; n++)
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pprint(2, " %d", cores[n]);
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pprint(2, "\n");
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}
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pprint2("number of connections: %d\n", m.nr_threads);
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/* create control session */
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m.host = find_hostname(optind, argc, argv);
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if (!m.host) {
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pr_err("no remote host given\n");
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return 1;
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}
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pprint3("connecting to %s for checking destinations...\n", m.host);
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ctrl = ssh_init_sftp_session(m.host, &opts);
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if (!ctrl)
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return 1;
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m.opts = &opts; /* save ssh-able ssh_opts */
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/* fill file list */
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ret = file_fill(ctrl, &m.file_list, &argv[optind], argc - optind - 1, m.target);
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if (ret < 0)
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goto out;
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#ifdef DEBUG
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file_dump(&m.file_list);
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#endif
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/* fill chunk list */
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ret = chunk_fill(&m.file_list, &m.chunk_list,
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m.nr_threads, min_chunk_sz, max_chunk_sz);
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if (ret < 0)
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goto out;
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#ifdef DEBUG
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chunk_dump(&m.chunk_list);
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#endif
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if (dryrun) {
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ssh_sftp_close(ctrl);
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return 0;
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}
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/* prepare thread instances */
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if ((n = list_count(&m.chunk_list)) < m.nr_threads) {
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pprint2("we have only %d chunk(s). "
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"set number of connections to %d\n", n, n);
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m.nr_threads = n;
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}
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m.threads = calloc(m.nr_threads, sizeof(struct mscp_thread));
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memset(m.threads, 0, m.nr_threads * sizeof(struct mscp_thread));
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for (n = 0; n < m.nr_threads; n++) {
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struct mscp_thread *t = &m.threads[n];
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t->finished = false;
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if (!coremask)
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t->cpu = -1;
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else
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t->cpu = cores[n % nr_cores];
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if (n == 0) {
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t->sftp = ctrl; /* reuse ctrl sftp session */
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ctrl = NULL;
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} else {
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pprint3("connecting to %s for a copy thread...\n", m.host);
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t->sftp = ssh_init_sftp_session(m.host, m.opts);
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}
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if (!t->sftp) {
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ret = 1;
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goto out;
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}
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}
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/* init mscp stat for printing progress bar */
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if (mscp_stat_init() < 0) {
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ret = 1;
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goto out;
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}
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/* spawn copy threads */
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for (n = 0; n < m.nr_threads; n++) {
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struct mscp_thread *t = &m.threads[n];
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ret = pthread_create(&t->tid, NULL, mscp_copy_thread, t);
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if (ret < 0) {
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pr_err("pthread_create error: %d\n", ret);
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stop_copy_threads(0);
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ret = 1;
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goto join_out;
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}
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}
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/* register SIGINT to stop threads */
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if (signal(SIGINT, stop_copy_threads) == SIG_ERR) {
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pr_err("cannot set signal: %s\n", strerrno());
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ret = 1;
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goto out;
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}
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join_out:
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/* waiting for threads join... */
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for (n = 0; n < m.nr_threads; n++) {
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if (m.threads[n].tid) {
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pthread_join(m.threads[n].tid, NULL);
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if (m.threads[n].ret < 0)
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ret = m.threads[n].ret;
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}
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}
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/* print final result */
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mscp_stat_final();
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out:
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if (ctrl)
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ssh_sftp_close(ctrl);
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if (m.threads) {
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for (n = 0; n < m.nr_threads; n++) {
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struct mscp_thread *t = &m.threads[n];
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if (t->sftp)
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ssh_sftp_close(t->sftp);
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}
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}
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return ret;
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}
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void mscp_copy_thread_cleanup(void *arg)
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{
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struct mscp_thread *t = arg;
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t->finished = true;
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}
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void *mscp_copy_thread(void *arg)
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{
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struct mscp_thread *t = arg;
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sftp_session sftp = t->sftp;
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struct chunk *c;
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if (t->cpu > -1) {
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if (set_thread_affinity(pthread_self(), t->cpu) < 0)
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return NULL;
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}
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pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL);
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pthread_setcanceltype(PTHREAD_CANCEL_DEFERRED, NULL);
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pthread_cleanup_push(mscp_copy_thread_cleanup, t);
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while (1) {
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LOCK_ACQUIRE_THREAD(&m.chunk_lock);
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c = chunk_acquire(&m.chunk_list);
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LOCK_RELEASE_THREAD();
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if (!c)
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break; /* no more chunks */
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if ((t->ret = chunk_prepare(c, sftp)) < 0)
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break;
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if ((t->ret = chunk_copy(c, sftp, m.nr_ahead, m.buf_sz, &t->done)) < 0)
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break;
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}
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pthread_cleanup_pop(1);
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if (t->ret < 0)
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pr_err("copy failed: chunk %s 0x%010lx-0x%010lx\n",
|
|
c->f->src_path, c->off, c->off + c->len);
|
|
|
|
return NULL;
|
|
}
|
|
|
|
|
|
/* progress bar-related functions */
|
|
|
|
double calculate_timedelta(struct timeval *b, struct timeval *a)
|
|
{
|
|
double sec, usec;
|
|
|
|
if (a->tv_usec < b->tv_usec) {
|
|
a->tv_usec += 1000000;
|
|
a->tv_sec--;
|
|
}
|
|
|
|
sec = a->tv_sec - b->tv_sec;
|
|
usec = a->tv_usec - b->tv_usec;
|
|
sec += usec / 1000000;
|
|
|
|
return sec;
|
|
}
|
|
|
|
double calculate_bps(size_t diff, struct timeval *b, struct timeval *a)
|
|
{
|
|
return (double)diff / calculate_timedelta(b, a);
|
|
}
|
|
|
|
char *calculate_eta(size_t remain, size_t diff, struct timeval *b, struct timeval *a)
|
|
{
|
|
static char buf[16];
|
|
double elapsed = calculate_timedelta(b, a);
|
|
double eta;
|
|
|
|
if (diff == 0)
|
|
snprintf(buf, sizeof(buf), "--:-- ETA");
|
|
else {
|
|
eta = remain / (diff / elapsed);
|
|
snprintf(buf, sizeof(buf), "%02d:%02d ETA",
|
|
(int)floor(eta / 60), (int)round(eta) % 60);
|
|
}
|
|
return buf;
|
|
}
|
|
|
|
void print_progress_bar(double percent, char *suffix)
|
|
{
|
|
int n, thresh, bar_width;
|
|
struct winsize ws;
|
|
char buf[128];
|
|
|
|
/*
|
|
* [=======> ] XX% SUFFIX
|
|
*/
|
|
|
|
buf[0] = '\0';
|
|
|
|
if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) < 0)
|
|
return; /* XXX */
|
|
bar_width = min(sizeof(buf), ws.ws_col) - strlen(suffix) - 7;
|
|
|
|
memset(buf, 0, sizeof(buf));
|
|
if (bar_width > 8) {
|
|
thresh = floor(bar_width * (percent / 100)) - 1;
|
|
|
|
for (n = 1; n < bar_width - 1; n++) {
|
|
if (n <= thresh)
|
|
buf[n] = '=';
|
|
else
|
|
buf[n] = ' ';
|
|
}
|
|
buf[thresh] = '>';
|
|
buf[0] = '[';
|
|
buf[bar_width - 1] = ']';
|
|
snprintf(buf + bar_width, sizeof(buf) - bar_width,
|
|
" %3d%% ", (int)floor(percent));
|
|
}
|
|
|
|
pprint1("%s%s", buf, suffix);
|
|
}
|
|
|
|
void print_progress(struct timeval *b, struct timeval *a,
|
|
size_t total, size_t last, size_t done)
|
|
{
|
|
char *bps_units[] = { "B/s ", "KB/s", "MB/s", "GB/s" };
|
|
char *byte_units[] = { "B ", "KB", "MB", "GB", "TB", "PB" };
|
|
char suffix[128];
|
|
int bps_u, byte_tu, byte_du;
|
|
size_t total_round, done_round;
|
|
int percent;
|
|
double bps;
|
|
|
|
#define array_size(a) (sizeof(a) / sizeof(a[0]))
|
|
|
|
if (total <= 0) {
|
|
pprint1("total 0 byte transferred");
|
|
return; /* copy 0-byte file(s) */
|
|
}
|
|
|
|
total_round = total;
|
|
for (byte_tu = 0; total_round > 1000 && byte_tu < array_size(byte_units) - 1;
|
|
byte_tu++)
|
|
total_round /= 1024;
|
|
|
|
bps = calculate_bps(done - last, b, a);
|
|
for (bps_u = 0; bps > 1000 && bps_u < array_size(bps_units); bps_u++)
|
|
bps /= 1000;
|
|
|
|
percent = floor(((double)(done) / (double)total) * 100);
|
|
|
|
done_round = done;
|
|
for (byte_du = 0; done_round > 1000 && byte_du < array_size(byte_units) - 1;
|
|
byte_du++)
|
|
done_round /= 1024;
|
|
|
|
snprintf(suffix, sizeof(suffix), "%4lu%s/%lu%s %6.1f%s %s",
|
|
done_round, byte_units[byte_du], total_round, byte_units[byte_tu],
|
|
bps, bps_units[bps_u], calculate_eta(total - done, done - last, b, a));
|
|
|
|
print_progress_bar(percent, suffix);
|
|
}
|
|
|
|
|
|
struct mscp_stat {
|
|
struct timeval start, before, after;
|
|
size_t total;
|
|
size_t last;
|
|
size_t done;
|
|
} s;
|
|
|
|
void mscp_stat_handler(int signum)
|
|
{
|
|
int n;
|
|
|
|
for (s.done = 0, n = 0; n < m.nr_threads; n++)
|
|
s.done += m.threads[n].done;
|
|
|
|
gettimeofday(&s.after, NULL);
|
|
if (signum == SIGALRM) {
|
|
alarm(1);
|
|
print_progress(&s.before, &s.after, s.total, s.last, s.done);
|
|
s.before = s.after;
|
|
s.last = s.done;
|
|
} else {
|
|
/* called from mscp_stat_final. calculate progress from the beginning */
|
|
print_progress(&s.start, &s.after, s.total, 0, s.done);
|
|
}
|
|
}
|
|
|
|
int mscp_stat_init()
|
|
{
|
|
struct file *f;
|
|
|
|
memset(&s, 0, sizeof(s));
|
|
list_for_each_entry(f, &m.file_list, list) {
|
|
s.total += f->size;
|
|
}
|
|
|
|
if (signal(SIGALRM, mscp_stat_handler) == SIG_ERR) {
|
|
pr_err("signal: %s\n", strerrno());
|
|
return -1;
|
|
}
|
|
|
|
gettimeofday(&s.start, NULL);
|
|
s.before = s.start;
|
|
alarm(1);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void mscp_stat_final()
|
|
{
|
|
alarm(0);
|
|
mscp_stat_handler(0);
|
|
}
|