blob: 4a53ae248beb641127222f6bdd936622921575ab [file] [log] [blame]
/*
* Copyright (C) 2013 SUSE. All rights reserved.
*
* This code is adapted from cmds-send.c and cmds-receive.c,
* Both of which are:
*
* Copyright (C) 2012 Alexander Block. All rights reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public
* License v2 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.
*
* You should have received a copy of the GNU General Public
* License along with this program; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 021110-1307, USA.
*/
#define _GNU_SOURCE
#include <unistd.h>
#include <stdint.h>
#include <dirent.h>
#include <pthread.h>
#include <math.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <libgen.h>
#include <mntent.h>
#include <limits.h>
#include <stdlib.h>
#include <asm/types.h>
#include <uuid/uuid.h>
/*
* This should be compilable without the rest of the btrfs-progs
* source distribution.
*/
#if BTRFS_FLAT_INCLUDES
#include "send-utils.h"
#include "send-stream.h"
#else
#include <btrfs/send-utils.h>
#include <btrfs/send-stream.h>
#endif /* BTRFS_FLAT_INCLUDES */
static int pipefd[2];
struct btrfs_ioctl_send_args io_send = {0, };
static char *subvol_path;
static char *root_path;
struct recv_args {
char *full_subvol_path;
char *root_path;
};
void usage(int error)
{
printf("send-test <btrfs root> <subvol>\n");
if (error)
exit(error);
}
static int print_subvol(const char *path, const u8 *uuid, u64 ctransid,
void *user)
{
struct recv_args *r = user;
char uuid_str[128];
r->full_subvol_path = path_cat(r->root_path, path);
uuid_unparse(uuid, uuid_str);
printf("subvol\t%s\t%llu\t%s\n", uuid_str,
(unsigned long long)ctransid, r->full_subvol_path);
return 0;
}
static int print_snapshot(const char *path, const u8 *uuid, u64 ctransid,
const u8 *parent_uuid, u64 parent_ctransid,
void *user)
{
struct recv_args *r = user;
char uuid_str[128];
char parent_uuid_str[128];
r->full_subvol_path = path_cat(r->root_path, path);
uuid_unparse(uuid, uuid_str);
uuid_unparse(parent_uuid, parent_uuid_str);
printf("snapshot\t%s\t%llu\t%s\t%llu\t%s\n", uuid_str,
(unsigned long long)ctransid, parent_uuid_str,
(unsigned long long)parent_ctransid, r->full_subvol_path);
return 0;
}
static int print_mkfile(const char *path, void *user)
{
struct recv_args *r = user;
char *full_path = path_cat(r->full_subvol_path, path);
printf("mkfile\t%s\n", full_path);
free(full_path);
return 0;
}
static int print_mkdir(const char *path, void *user)
{
struct recv_args *r = user;
char *full_path = path_cat(r->full_subvol_path, path);
printf("mkdir\t%s\n", full_path);
free(full_path);
return 0;
}
static int print_mknod(const char *path, u64 mode, u64 dev, void *user)
{
struct recv_args *r = user;
char *full_path = path_cat(r->full_subvol_path, path);
printf("mknod\t%llo\t0x%llx\t%s\n", (unsigned long long)mode,
(unsigned long long)dev, full_path);
free(full_path);
return 0;
}
static int print_mkfifo(const char *path, void *user)
{
struct recv_args *r = user;
char *full_path = path_cat(r->full_subvol_path, path);
printf("mkfifo\t%s\n", full_path);
free(full_path);
return 0;
}
static int print_mksock(const char *path, void *user)
{
struct recv_args *r = user;
char *full_path = path_cat(r->full_subvol_path, path);
printf("mksock\t%s\n", full_path);
free(full_path);
return 0;
}
static int print_symlink(const char *path, const char *lnk, void *user)
{
struct recv_args *r = user;
char *full_path = path_cat(r->full_subvol_path, path);
printf("symlink\t%s\t%s\n", lnk, full_path);
free(full_path);
return 0;
}
static int print_rename(const char *from, const char *to, void *user)
{
struct recv_args *r = user;
char *full_from = path_cat(r->full_subvol_path, from);
char *full_to = path_cat(r->full_subvol_path, to);
printf("rename\t%s\t%s\n", from, to);
free(full_from);
free(full_to);
return 0;
}
static int print_link(const char *path, const char *lnk, void *user)
{
struct recv_args *r = user;
char *full_path = path_cat(r->full_subvol_path, path);
printf("link\t%s\t%s\n", lnk, full_path);
free(full_path);
return 0;
}
static int print_unlink(const char *path, void *user)
{
struct recv_args *r = user;
char *full_path = path_cat(r->full_subvol_path, path);
printf("unlink\t%s\n", full_path);
free(full_path);
return 0;
}
static int print_rmdir(const char *path, void *user)
{
struct recv_args *r = user;
char *full_path = path_cat(r->full_subvol_path, path);
printf("rmdir\t%s\n", full_path);
free(full_path);
return 0;
}
static int print_write(const char *path, const void *data, u64 offset,
u64 len, void *user)
{
struct recv_args *r = user;
char *full_path = path_cat(r->full_subvol_path, path);
printf("write\t%llu\t%llu\t%s\n", (unsigned long long)offset,
(unsigned long long)len, full_path);
free(full_path);
return 0;
}
static int print_clone(const char *path, u64 offset, u64 len,
const u8 *clone_uuid, u64 clone_ctransid,
const char *clone_path, u64 clone_offset,
void *user)
{
struct recv_args *r = user;
char *full_path = path_cat(r->full_subvol_path, path);
printf("clone\t%s\t%s\n", full_path, clone_path);
free(full_path);
return 0;
}
static int print_set_xattr(const char *path, const char *name,
const void *data, int len, void *user)
{
struct recv_args *r = user;
char *full_path = path_cat(r->full_subvol_path, path);
printf("set_xattr\t%s\t%s\t%d\n", full_path,
name, len);
free(full_path);
return 0;
}
static int print_remove_xattr(const char *path, const char *name, void *user)
{
struct recv_args *r = user;
char *full_path = path_cat(r->full_subvol_path, path);
printf("remove_xattr\t%s\t%s\n", full_path, name);
free(full_path);
return 0;
}
static int print_truncate(const char *path, u64 size, void *user)
{
struct recv_args *r = user;
char *full_path = path_cat(r->full_subvol_path, path);
printf("truncate\t%llu\t%s\n", (unsigned long long)size, full_path);
free(full_path);
return 0;
}
static int print_chmod(const char *path, u64 mode, void *user)
{
struct recv_args *r = user;
char *full_path = path_cat(r->full_subvol_path, path);
printf("chmod\t%llo\t%s\n", (unsigned long long)mode, full_path);
free(full_path);
return 0;
}
static int print_chown(const char *path, u64 uid, u64 gid, void *user)
{
struct recv_args *r = user;
char *full_path = path_cat(r->full_subvol_path, path);
printf("chown\t%llu\t%llu\t%s\n", (unsigned long long)uid,
(unsigned long long)gid, full_path);
free(full_path);
return 0;
}
static int print_utimes(const char *path, struct timespec *at,
struct timespec *mt, struct timespec *ct,
void *user)
{
struct recv_args *r = user;
char *full_path = path_cat(r->full_subvol_path, path);
printf("utimes\t%s\n", full_path);
free(full_path);
return 0;
}
static int print_update_extent(const char *path, u64 offset, u64 len,
void *user)
{
struct recv_args *r = user;
char *full_path = path_cat(r->full_subvol_path, path);
printf("update_extent\t%s\t%llu\t%llu\n", full_path, offset, len);
free(full_path);
return 0;
}
struct btrfs_send_ops send_ops_print = {
.subvol = print_subvol,
.snapshot = print_snapshot,
.mkfile = print_mkfile,
.mkdir = print_mkdir,
.mknod = print_mknod,
.mkfifo = print_mkfifo,
.mksock = print_mksock,
.symlink = print_symlink,
.rename = print_rename,
.link = print_link,
.unlink = print_unlink,
.rmdir = print_rmdir,
.write = print_write,
.clone = print_clone,
.set_xattr = print_set_xattr,
.remove_xattr = print_remove_xattr,
.truncate = print_truncate,
.chmod = print_chmod,
.chown = print_chown,
.utimes = print_utimes,
.update_extent = print_update_extent,
};
static void *process_thread(void *arg_)
{
int ret;
while (1) {
ret = btrfs_read_and_process_send_stream(pipefd[-1],
&send_ops_print, arg_, 0);
if (ret)
break;
}
if (ret > 0)
ret = 0;
return ERR_PTR(ret);
}
int main(int argc, char **argv)
{
int ret = 0;
int subvol_fd;
pthread_t t_read;
pthread_attr_t t_attr;
void *t_err = NULL;
struct recv_args r;
if (argc != 3)
usage(EINVAL);
root_path = realpath(argv[1], NULL);
if (!root_path) {
ret = errno;
usage(ret);
}
subvol_path = realpath(argv[2], NULL);
if (!subvol_path) {
ret = errno;
usage(ret);
}
r.full_subvol_path = subvol_path;
r.root_path = root_path;
subvol_fd = open(subvol_path, O_RDONLY|O_NOATIME);
if (subvol_fd < 0) {
ret = errno;
fprintf(stderr, "ERROR: Subvolume open failed. %s\n",
strerror(ret));
goto out;
}
ret = pthread_attr_init(&t_attr);
if (ret < 0) {
fprintf(stderr, "ERROR: pthread init failed. %s\n",
strerror(ret));
goto out;
}
ret = pipe(pipefd);
if (ret < 0) {
ret = errno;
fprintf(stderr, "ERROR: pipe failed. %s\n", strerror(ret));
goto out;
}
ret = pthread_create(&t_read, &t_attr, process_thread, &r);
if (ret < 0) {
ret = errno;
fprintf(stderr, "ERROR: pthread create failed. %s\n",
strerror(ret));
goto out;
}
io_send.send_fd = pipefd[1];
io_send.clone_sources_count = 0;
io_send.clone_sources = NULL;
io_send.parent_root = 0;
io_send.flags = BTRFS_SEND_FLAG_NO_FILE_DATA;
ret = ioctl(subvol_fd, BTRFS_IOC_SEND, &io_send);
if (ret) {
ret = errno;
fprintf(stderr, "ERROR: send ioctl failed with %d: %s\n", ret,
strerror(ret));
goto out;
}
close(pipefd[1]);
ret = pthread_join(t_read, &t_err);
if (ret) {
fprintf(stderr, "ERROR: pthread_join failed: %s\n",
strerror(ret));
goto out;
}
if (t_err) {
ret = (long int)t_err;
fprintf(stderr, "ERROR: failed to process send stream, ret=%ld "
"(%s)\n", (long int)t_err, strerror(ret));
goto out;
}
pthread_attr_destroy(&t_attr);
out:
return ret;
}