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#include <string.h>
#include <unistd.h>
#include <dirent.h>
#include <sys/stat.h>
#include <libgen.h>
#include <ssh.h>
#include <util.h>
#include <list.h>
#include <atomic.h>
#include <path.h>
static int append_path(sftp_session sftp, const char *path, mstat s,
struct list_head *path_list)
{
struct path *p;
if (!(p = malloc(sizeof(*p)))) {
pr_err("failed to allocate memory: %s\n", strerrno());
return -1;
}
memset(p, 0, sizeof(*p));
INIT_LIST_HEAD(&p->list);
strncpy(p->path, path, PATH_MAX - 1);
p->size = mstat_size(s);
p->mode = mstat_mode(s);
p->state = FILE_STATE_INIT;
lock_init(&p->lock);
list_add_tail(&p->list, path_list);
return 0;
}
static bool check_path_should_skip(const char *path)
{
int len = strlen(path);
if ((len == 1 && strncmp(path, ".", 1) == 0) ||
(len == 2 && strncmp(path, "..", 2) == 0)) {
return true;
}
return false;
}
static int walk_path_recursive(sftp_session sftp, const char *path,
struct list_head *path_list)
{
char next_path[PATH_MAX];
mdirent *e;
mdir *d;
mstat s;
int ret;
if (mscp_stat(path, &s, sftp) < 0)
return -1;
if (mstat_is_regular(s)) {
/* this path is regular file. it is to be copied */
ret = append_path(sftp, path, s, path_list);
mscp_stat_free(s);
return ret;
}
if (!mstat_is_dir(s)) {
/* not regular file and not directory, skip it. */
mscp_stat_free(s);
return 0;
}
mscp_stat_free(s);
/* ok, this path is directory. walk it. */
if (!(d = mscp_opendir(path, sftp)))
return -1;
for (e = mscp_readdir(d); !mdirent_is_null(e); e = mscp_readdir(d)) {
if (check_path_should_skip(mdirent_name(e)))
continue;
if (strlen(path) + 1 + strlen(mdirent_name(e)) > PATH_MAX) {
pr_err("too long path: %s/%s\n", path, mdirent_name(e));
return -1;
}
snprintf(next_path, sizeof(next_path), "%s/%s", path, mdirent_name(e));
ret = walk_path_recursive(sftp, next_path, path_list);
if (ret < 0)
return ret;
}
mscp_closedir(d);
return 0;
}
int walk_src_path(sftp_session sftp, const char *src_path, struct list_head *path_list)
{
return walk_path_recursive(sftp, src_path, path_list);
}
static int src2dst_path(const char *src_path, const char *src_file_path,
const char *dst_path, char *dst_file_path, size_t len,
bool src_path_is_dir, bool dst_path_is_dir)
{
char copy[PATH_MAX];
char *prefix;
int offset;
strncpy(copy, src_path, PATH_MAX - 1);
prefix = dirname(copy);
if (!prefix) {
pr_err("dirname: %s\n", strerrno());
return -1;
}
if (strlen(prefix) == 1 && prefix[0] == '.')
offset = 0;
else
offset = strlen(prefix) + 1;
/* both are file */
if (!src_path_is_dir && !dst_path_is_dir)
strncpy(dst_file_path, dst_path, len);
/* src is file, and dst is dir */
if (!src_path_is_dir && dst_path_is_dir)
snprintf(dst_file_path, len, "%s/%s", dst_path, src_path + offset);
/* both are directory */
if (src_path_is_dir && dst_path_is_dir)
snprintf(dst_file_path, len, "%s/%s", dst_path, src_file_path + offset);
/* dst path does not exist. change dir name to dst_path */
if (src_path_is_dir && !dst_path_is_dir)
snprintf(dst_file_path, len, "%s/%s",
dst_path, src_file_path + strlen(src_path) + 1);
return 0;
}
int resolve_dst_path(sftp_session sftp, const char *src_path, const char *dst_path,
struct list_head *path_list, bool src_is_dir, bool dst_is_dir)
{
struct path *p;
list_for_each_entry(p, path_list, list) {
if (src2dst_path(src_path, p->path, dst_path, p->dst_path, PATH_MAX,
src_is_dir, dst_is_dir) < 0)
return -1;
}
return 0;
}
void path_dump(struct list_head *path_list)
{
struct path *p;
list_for_each_entry(p, path_list, list) {
printf("src: %s %lu-byte\n", p->path, p->size);
printf("dst: %s\n", p->dst_path);
}
}
/* chunk preparation */
static struct chunk *alloc_chunk(struct path *p)
{
struct chunk *c;
if (!(c = malloc(sizeof(*c)))) {
pr_err("%s\n", strerrno());
return NULL;
}
memset(c, 0, sizeof(*c));
c->p = p;
c->off = 0;
c->len = 0;
refcnt_inc(&p->refcnt);
return c;
}
static int get_page_mask(void)
{
long page_sz = sysconf(_SC_PAGESIZE);
size_t page_mask = 0;
int n;
for (n = 0; page_sz > 0; page_sz >>= 1, n++) {
page_mask <<= 1;
page_mask |= 1;
}
return page_mask >> 1;
}
int prepare_chunk(struct list_head *path_list, struct list_head *chunk_list,
int nr_conn, int min_chunk_sz, int max_chunk_sz)
{
struct chunk *c;
struct path *p;
size_t page_mask;
size_t chunk_sz;
size_t size;
page_mask = get_page_mask();
list_for_each_entry(p, path_list, list) {
if (p->size <= min_chunk_sz)
chunk_sz = p->size;
else if (max_chunk_sz)
chunk_sz = max_chunk_sz;
else {
chunk_sz = (p->size - (p->size % nr_conn)) / nr_conn;
chunk_sz &= ~page_mask; /* align with page_sz */
if (chunk_sz <= min_chunk_sz)
chunk_sz = min_chunk_sz;
}
/* for (size = f->size; size > 0;) does not create a
* file (chunk) when file size is 0. This do {} while
* (size > 0) creates just open/close a 0-byte file.
*/
size = p->size;
do {
c = alloc_chunk(p);
if (!c)
return -1;
c->off = p->size - size;
c->len = size < chunk_sz ? size : chunk_sz;
size -= c->len;
list_add_tail(&c->list, chunk_list);
} while (size > 0);
}
return 0;
}
void chunk_dump(struct list_head *chunk_list)
{
struct chunk *c;
list_for_each_entry(c, chunk_list, list) {
printf("chunk: %s 0x%lx-%lx bytes\n",
c->p->path, c->off, c->off + c->len);
}
}
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