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#include <stdbool.h>
#include <unistd.h>
#include <signal.h>
#include <sys/time.h>
#include <sys/ioctl.h>
#include <math.h>
#include <pthread.h>
#include <list.h>
#include <util.h>
#include <ssh.h>
#include <path.h>
#include <pprint.h>
#include <atomic.h>
#include <platform.h>
#include <mscp.h>
struct mscp {
const char *remote; /* remote host (and uername) */
struct mscp_opts *opts;
struct ssh_opts ssh_opts;
sftp_session first; /* first sftp session */
char dst_path[PATH_MAX];
struct list_head src_list;
struct list_head path_list;
struct list_head chunk_list;
lock chunk_lock;
struct mscp_thread *threads;
};
struct src {
struct list_head list;
char *path;
};
#define DEFAULT_MIN_CHUNK_SZ (64 << 20) /* 64MB */
#define DEFAULT_NR_AHEAD 32
#define DEFAULT_BUF_SZ 16384
struct mscp *mscp_init(const char *remote_host, struct mscp_opts *opts)
{
struct mscp *m;
m = malloc(sizeof(*m));
if (!m) {
pr_err("failed to allocate memory: %s\n", strerrno());
return NULL;
}
memset(m, 0, sizeof(*m));
INIT_LIST_HEAD(&m->src_list);
INIT_LIST_HEAD(&m->path_list);
INIT_LIST_HEAD(&m->chunk_list);
lock_init(&m->chunk_lock);
m->remote = strdup(remote_host);
if (!m->remote) {
pr_err("failed to allocate memory: %s\n", strerrno());
free(m);
return NULL;
}
m->opts = opts;
m->ssh_opts.login_name = opts->ssh_login_name;
m->ssh_opts.port = opts->ssh_port;
m->ssh_opts.identity = opts->ssh_identity;
m->ssh_opts.cipher = opts->ssh_cipher_spec;
m->ssh_opts.hmac = opts->ssh_hmac_spec;
m->ssh_opts.compress = opts->ssh_compress_level;
m->ssh_opts.debuglevel = opts->ssh_debug_level;
m->ssh_opts.no_hostkey_check = opts->ssh_no_hostkey_check;
m->ssh_opts.nodelay = opts->ssh_disable_tcp_nodely;
m->first = ssh_init_sftp_session(m->remote, &m->ssh_opts);
if (!m->first) {
free(m);
return NULL;
}
return m;
}
int mscp_add_src_path(struct mscp *m, const char *src_path)
{
struct src *s;
s = malloc(sizeof(*s));
if (!s) {
pr_err("failed to allocate memory: %s\n", strerrno());
return -1;
}
memset(s, 0, sizeof(*s));
s->path = strdup(src_path);
if (!s->path) {
pr_err("failed to allocate memory: %s\n", strerrno());
free(s);
return -1;
}
list_add_tail(&s->list, &m->src_list);
return 0;
}
static void mscp_free_src_list(struct mscp *m)
{
struct src *s, *n;
list_for_each_entry_safe(s, n, &m->src_list, list) {
free(s->path);
list_del(&s->list);
free(s);
}
}
int mscp_set_dst_path(struct mscp *m, const char *dst_path)
{
if (strlen(dst_path) + 1 >= PATH_MAX) {
pr_err("too long dst path: %s\n", dst_path);
return -1;
}
strncpy(m->dst_path, dst_path, PATH_MAX);
return 0;
}
int mscp_prepare(struct mscp *m)
{
sftp_session src_sftp = NULL, dst_sftp = NULL;
bool src_path_is_dir, dst_path_is_dir;
struct list_head tmp;
struct src *s;
mstat ss, ds;
switch (m->opts->direct) {
case MSCP_DIRECT_L2R:
src_sftp = NULL;
dst_sftp = m->first;
break;
case MSCP_DIRECT_R2L:
src_sftp = m->first;
dst_sftp = NULL;
break;
default:
pr_err("invalid mscp direction: %d\n", m->opts->direct);
return -1;
}
if (mscp_stat(m->dst_path, &ds, dst_sftp) == 0) {
if (mstat_is_dir(ds))
dst_path_is_dir = true;
mscp_stat_free(ds);
} else
dst_path_is_dir = false;
/* walk a src_path recusively, and resolve path->dst_path for each src */
list_for_each_entry(s, &m->src_list, list) {
if (mscp_stat(s->path, &ss, src_sftp) < 0) {
pr_err("stat: %s\n", mscp_strerror(src_sftp));
return -1;
}
src_path_is_dir = mstat_is_dir(ss);
mscp_stat_free(ss);
INIT_LIST_HEAD(&tmp);
if (walk_src_path(src_sftp, s->path, &tmp) < 0)
return -1;
if (resolve_dst_path(s->path, m->dst_path, &tmp,
src_path_is_dir, dst_path_is_dir) < 0)
return -1;
list_splice_tail(&tmp, m->path_list.prev);
}
if (resolve_chunk(&m->path_list, &m->chunk_list, m->opts->nr_threads,
m->opts->max_chunk_sz, m->opts->min_chunk_sz) < 0)
return -1;
mscp_free_src_list(m);
return 0;
}
int mscp_start(struct mscp *m)
{
return 0;
}
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