Btrfs-progs: rearrange files in the repo

Separate every command group into its own file (cmds_<group>.c) and
rearrange includes.  Remove btrfs_cmds.c.

Signed-off-by: Ilya Dryomov <idryomov@gmail.com>

9 files changed, 1419 insertions, 1312 deletions

diff --git a/Makefile b/Makefile
index 834be47..0d47bd5 100644
--- a/Makefile
+++ b/Makefile
@@ -5,6 +5,8 @@ objects = ctree.o disk-io.o radix-tree.o extent-tree.o print-tree.o \
 	  root-tree.o dir-item.o file-item.o inode-item.o \
 	  inode-map.o crc32c.o rbtree.o extent-cache.o extent_io.o \
 	  volumes.o utils.o btrfs-list.o btrfslabel.o
+cmds_objects = cmds-subvolume.o cmds-filesystem.o cmds-device.o cmds-scrub.o \
+	       cmds-inspect.o
 
 CHECKFLAGS= -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise \
 	    -Wuninitialized -Wshadow -Wundef
@@ -36,8 +38,8 @@ all: version $(progs) manpages
 version:
 	bash version.sh
 
-btrfs: $(objects) btrfs.o btrfs_cmds.o scrub.o
-	$(CC) $(CFLAGS) -o btrfs btrfs.o btrfs_cmds.o scrub.o \
+btrfs: $(objects) btrfs.o common.o $(cmds_objects)
+	$(CC) $(CFLAGS) -o btrfs btrfs.o common.o $(cmds_objects) \
 		$(objects) $(LDFLAGS) $(LIBS) -lpthread
 
 calc-size: $(objects) calc-size.o
diff --git a/btrfs_cmds.c b/btrfs_cmds.c
deleted file mode 100644
index b59e9cb..0000000
--- a/btrfs_cmds.c
+++ /dev/null
@@ -1,1307 +0,0 @@
-/*
- * 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.
- */
-
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/ioctl.h>
-#include <sys/types.h>
-#include <dirent.h>
-#include <sys/stat.h>
-#include <unistd.h>
-#include <fcntl.h>
-#include <libgen.h>
-#include <limits.h>
-#include <uuid/uuid.h>
-#include <ctype.h>
-
-#undef ULONG_MAX
-
-#include "kerncompat.h"
-#include "ctree.h"
-#include "transaction.h"
-#include "utils.h"
-#include "version.h"
-#include "ioctl.h"
-#include "volumes.h"
-
-#include "btrfs_cmds.h"
-#include "btrfslabel.h"
-
-#ifdef __CHECKER__
-#define BLKGETSIZE64 0
-#define BTRFS_IOC_SNAP_CREATE_V2 0
-#define BTRFS_VOL_NAME_MAX 255
-struct btrfs_ioctl_vol_args { char name[BTRFS_VOL_NAME_MAX]; };
-static inline int ioctl(int fd, int define, void *arg) { return 0; }
-#endif
-
-/*
- * test if path is a subvolume:
- * this function return
- * 0-> path exists but it is not a subvolume
- * 1-> path exists and it is  a subvolume
- * -1 -> path is unaccessible
- */
-static int test_issubvolume(char *path)
-{
-
-	struct stat	st;
-	int		res;
-
-	res = stat(path, &st);
-	if(res < 0 )
-		return -1;
-
-	return (st.st_ino == 256) && S_ISDIR(st.st_mode);
-
-}
-
-/*
- * test if path is a directory
- * this function return
- * 0-> path exists but it is not a directory
- * 1-> path exists and it is  a directory
- * -1 -> path is unaccessible
- */
-static int test_isdir(char *path)
-{
-	struct stat	st;
-	int		res;
-
-	res = stat(path, &st);
-	if(res < 0 )
-		return -1;
-
-	return S_ISDIR(st.st_mode);
-
-}
-
-int open_file_or_dir(const char *fname)
-{
-	int ret;
-	struct stat st;
-	DIR *dirstream;
-	int fd;
-
-	ret = stat(fname, &st);
-	if (ret < 0) {
-		return -1;
-	}
-	if (S_ISDIR(st.st_mode)) {
-		dirstream = opendir(fname);
-		if (!dirstream) {
-			return -2;
-		}
-		fd = dirfd(dirstream);
-	} else {
-		fd = open(fname, O_RDWR);
-	}
-	if (fd < 0) {
-		return -3;
-	}
-	return fd;
-}
-
-static u64 parse_size(char *s)
-{
-	int len = strlen(s);
-	char c;
-	u64 mult = 1;
-
-	if (!isdigit(s[len - 1])) {
-		c = tolower(s[len - 1]);
-		switch (c) {
-		case 'g':
-			mult *= 1024;
-		case 'm':
-			mult *= 1024;
-		case 'k':
-			mult *= 1024;
-		case 'b':
-			break;
-		default:
-			fprintf(stderr, "Unknown size descriptor %c\n", c);
-			exit(1);
-		}
-		s[len - 1] = '\0';
-	}
-	return atoll(s) * mult;
-}
-
-static int parse_compress_type(char *s)
-{
-	if (strcmp(optarg, "zlib") == 0)
-		return BTRFS_COMPRESS_ZLIB;
-	else if (strcmp(optarg, "lzo") == 0)
-		return BTRFS_COMPRESS_LZO;
-	else {
-		fprintf(stderr, "Unknown compress type %s\n", s);
-		exit(1);
-	};
-}
-
-int do_defrag(int ac, char **av)
-{
-	int fd;
-	int flush = 0;
-	u64 start = 0;
-	u64 len = (u64)-1;
-	u32 thresh = 0;
-	int i;
-	int errors = 0;
-	int ret = 0;
-	int verbose = 0;
-	int fancy_ioctl = 0;
-	struct btrfs_ioctl_defrag_range_args range;
-	int e=0;
-	int compress_type = BTRFS_COMPRESS_NONE;
-
-	optind = 1;
-	while(1) {
-		int c = getopt(ac, av, "vc::fs:l:t:");
-		if (c < 0)
-			break;
-		switch(c) {
-		case 'c':
-			compress_type = BTRFS_COMPRESS_ZLIB;
-			if (optarg)
-				compress_type = parse_compress_type(optarg);
-			fancy_ioctl = 1;
-			break;
-		case 'f':
-			flush = 1;
-			fancy_ioctl = 1;
-			break;
-		case 'v':
-			verbose = 1;
-			break;
-		case 's':
-			start = parse_size(optarg);
-			fancy_ioctl = 1;
-			break;
-		case 'l':
-			len = parse_size(optarg);
-			fancy_ioctl = 1;
-			break;
-		case 't':
-			thresh = parse_size(optarg);
-			fancy_ioctl = 1;
-			break;
-		default:
-			fprintf(stderr, "Invalid arguments for defragment\n");
-			free(av);
-			return 1;
-		}
-	}
-	if (ac - optind == 0) {
-		fprintf(stderr, "Invalid arguments for defragment\n");
-		free(av);
-		return 1;
-	}
-
-	memset(&range, 0, sizeof(range));
-	range.start = start;
-	range.len = len;
-	range.extent_thresh = thresh;
-	if (compress_type) {
-		range.flags |= BTRFS_DEFRAG_RANGE_COMPRESS;
-		range.compress_type = compress_type;
-	}
-	if (flush)
-		range.flags |= BTRFS_DEFRAG_RANGE_START_IO;
-
-	for (i = optind; i < ac; i++) {
-		if (verbose)
-			printf("%s\n", av[i]);
-		fd = open_file_or_dir(av[i]);
-		if (fd < 0) {
-			fprintf(stderr, "failed to open %s\n", av[i]);
-			perror("open:");
-			errors++;
-			continue;
-		}
-		if (!fancy_ioctl) {
-			ret = ioctl(fd, BTRFS_IOC_DEFRAG, NULL);
-			e=errno;
-		} else {
-			ret = ioctl(fd, BTRFS_IOC_DEFRAG_RANGE, &range);
-			if (ret && errno == ENOTTY) {
-				fprintf(stderr, "ERROR: defrag range ioctl not "
-					"supported in this kernel, please try "
-					"without any options.\n");
-				errors++;
-				close(fd);
-				break;
-			}
-		}
-		if (ret) {
-			fprintf(stderr, "ERROR: defrag failed on %s - %s\n",
-				av[i], strerror(e));
-			errors++;
-		}
-		close(fd);
-	}
-	if (verbose)
-		printf("%s\n", BTRFS_BUILD_VERSION);
-	if (errors) {
-		fprintf(stderr, "total %d failures\n", errors);
-		exit(1);
-	}
-
-	free(av);
-	return errors + 20;
-}
-
-int do_find_newer(int argc, char **argv)
-{
-	int fd;
-	int ret;
-	char *subvol;
-	u64 last_gen;
-
-	subvol = argv[1];
-	last_gen = atoll(argv[2]);
-
-	ret = test_issubvolume(subvol);
-	if (ret < 0) {
-		fprintf(stderr, "ERROR: error accessing '%s'\n", subvol);
-		return 12;
-	}
-	if (!ret) {
-		fprintf(stderr, "ERROR: '%s' is not a subvolume\n", subvol);
-		return 13;
-	}
-
-	fd = open_file_or_dir(subvol);
-	if (fd < 0) {
-		fprintf(stderr, "ERROR: can't access '%s'\n", subvol);
-		return 12;
-	}
-	ret = find_updated_files(fd, 0, last_gen);
-	if (ret)
-		return 19;
-	return 0;
-}
-
-int do_subvol_list(int argc, char **argv)
-{
-	int fd;
-	int ret;
-	int print_parent = 0;
-	char *subvol;
-        int optind = 1;
-
-	while(1) {
-		int c = getopt(argc, argv, "p");
-		if (c < 0) break;
-		switch(c) {
-		case 'p':
-			print_parent = 1;
-			optind++;
-			break;
-		}
-	}
-	
-	if (argc - optind != 1) {
-		fprintf(stderr, "ERROR: invalid arguments for subvolume list\n");
-		return 1;
-	}
-
-	subvol = argv[optind];
-
-	ret = test_issubvolume(subvol);
-	if (ret < 0) {
-		fprintf(stderr, "ERROR: error accessing '%s'\n", subvol);
-		return 12;
-	}
-	if (!ret) {
-		fprintf(stderr, "ERROR: '%s' is not a subvolume\n", subvol);
-		return 13;
-	}
-
-	fd = open_file_or_dir(subvol);
-	if (fd < 0) {
-		fprintf(stderr, "ERROR: can't access '%s'\n", subvol);
-		return 12;
-	}
-	ret = list_subvols(fd, print_parent, 0);
-	if (ret)
-		return 19;
-	return 0;
-}
-
-int do_clone(int argc, char **argv)
-{
-	char	*subvol, *dst;
-	int	res, fd, fddst, len, e, optind = 0, readonly = 0;
-	char	*newname;
-	char	*dstdir;
-	struct btrfs_ioctl_vol_args_v2	args;
-
-	memset(&args, 0, sizeof(args));
-
-	while (1) {
-		int c = getopt(argc, argv, "r");
-
-		if (c < 0)
-			break;
-		switch (c) {
-		case 'r':
-			optind++;
-			readonly = 1;
-			break;
-		default:
-			fprintf(stderr,
-				"Invalid arguments for subvolume snapshot\n");
-			free(argv);
-			return 1;
-		}
-	}
-	if (argc - optind != 3) {
-		fprintf(stderr, "Invalid arguments for subvolume snapshot\n");
-		free(argv);
-		return 1;
-	}
-
-	subvol = argv[optind+1];
-	dst = argv[optind+2];
-
-	res = test_issubvolume(subvol);
-	if(res<0){
-		fprintf(stderr, "ERROR: error accessing '%s'\n", subvol);
-		return 12;
-	}
-	if(!res){
-		fprintf(stderr, "ERROR: '%s' is not a subvolume\n", subvol);
-		return 13;
-	}
-
-	res = test_isdir(dst);
-	if(res == 0 ){
-		fprintf(stderr, "ERROR: '%s' exists and it is not a directory\n", dst);
-		return 12;
-	}
-
-	if(res>0){
-		newname = strdup(subvol);
-		newname = basename(newname);
-		dstdir = dst;
-	}else{
-		newname = strdup(dst);
-		newname = basename(newname);
-		dstdir = strdup(dst);
-		dstdir = dirname(dstdir);
-	}
-
-	if( !strcmp(newname,".") || !strcmp(newname,"..") ||
-	     strchr(newname, '/') ){
-		fprintf(stderr, "ERROR: incorrect snapshot name ('%s')\n",
-			newname);
-		return 14;
-	}
-
-	len = strlen(newname);
-	if (len == 0 || len >= BTRFS_VOL_NAME_MAX) {
-		fprintf(stderr, "ERROR: snapshot name too long ('%s)\n",
-			newname);
-		return 14;
-	}
-
-	fddst = open_file_or_dir(dstdir);
-	if (fddst < 0) {
-		fprintf(stderr, "ERROR: can't access to '%s'\n", dstdir);
-		return 12;
-	}
-
-	fd = open_file_or_dir(subvol);
-	if (fd < 0) {
-		close(fddst);
-		fprintf(stderr, "ERROR: can't access to '%s'\n", dstdir);
-		return 12;
-	}
-
-	if (readonly) {
-		args.flags |= BTRFS_SUBVOL_RDONLY;
-		printf("Create a readonly snapshot of '%s' in '%s/%s'\n",
-		       subvol, dstdir, newname);
-	} else {
-		printf("Create a snapshot of '%s' in '%s/%s'\n",
-		       subvol, dstdir, newname);
-	}
-
-	args.fd = fd;
-	strncpy(args.name, newname, BTRFS_SUBVOL_NAME_MAX);
-	res = ioctl(fddst, BTRFS_IOC_SNAP_CREATE_V2, &args);
-	e = errno;
-
-	close(fd);
-	close(fddst);
-
-	if(res < 0 ){
-		fprintf( stderr, "ERROR: cannot snapshot '%s' - %s\n",
-			subvol, strerror(e));
-		return 11;
-	}
-
-	return 0;
-
-}
-
-int do_delete_subvolume(int argc, char **argv)
-{
-	int	res, fd, len, e;
-	struct btrfs_ioctl_vol_args	args;
-	char	*dname, *vname, *cpath;
-	char	*path = argv[1];
-
-	res = test_issubvolume(path);
-	if(res<0){
-		fprintf(stderr, "ERROR: error accessing '%s'\n", path);
-		return 12;
-	}
-	if(!res){
-		fprintf(stderr, "ERROR: '%s' is not a subvolume\n", path);
-		return 13;
-	}
-
-	cpath = realpath(path, 0);
-	dname = strdup(cpath);
-	dname = dirname(dname);
-	vname = strdup(cpath);
-	vname = basename(vname);
-	free(cpath);
-
-	if( !strcmp(vname,".") || !strcmp(vname,"..") ||
-	     strchr(vname, '/') ){
-		fprintf(stderr, "ERROR: incorrect subvolume name ('%s')\n",
-			vname);
-		return 14;
-	}
-
-	len = strlen(vname);
-	if (len == 0 || len >= BTRFS_VOL_NAME_MAX) {
-		fprintf(stderr, "ERROR: snapshot name too long ('%s)\n",
-			vname);
-		return 14;
-	}
-
-	fd = open_file_or_dir(dname);
-	if (fd < 0) {
-		close(fd);
-		fprintf(stderr, "ERROR: can't access to '%s'\n", dname);
-		return 12;
-	}
-
-	printf("Delete subvolume '%s/%s'\n", dname, vname);
-	strncpy(args.name, vname, BTRFS_PATH_NAME_MAX);
-	res = ioctl(fd, BTRFS_IOC_SNAP_DESTROY, &args);
-	e = errno;
-
-	close(fd);
-
-	if(res < 0 ){
-		fprintf( stderr, "ERROR: cannot delete '%s/%s' - %s\n",
-			dname, vname, strerror(e));
-		return 11;
-	}
-
-	return 0;
-
-}
-
-int do_create_subvol(int argc, char **argv)
-{
-	int	res, fddst, len, e;
-	char	*newname;
-	char	*dstdir;
-	struct btrfs_ioctl_vol_args	args;
-	char	*dst = argv[1];
-
-	res = test_isdir(dst);
-	if(res >= 0 ){
-		fprintf(stderr, "ERROR: '%s' exists\n", dst);
-		return 12;
-	}
-
-	newname = strdup(dst);
-	newname = basename(newname);
-	dstdir = strdup(dst);
-	dstdir = dirname(dstdir);
-
-	if( !strcmp(newname,".") || !strcmp(newname,"..") ||
-	     strchr(newname, '/') ){
-		fprintf(stderr, "ERROR: uncorrect subvolume name ('%s')\n",
-			newname);
-		return 14;
-	}
-
-	len = strlen(newname);
-	if (len == 0 || len >= BTRFS_VOL_NAME_MAX) {
-		fprintf(stderr, "ERROR: subvolume name too long ('%s)\n",
-			newname);
-		return 14;
-	}
-
-	fddst = open_file_or_dir(dstdir);
-	if (fddst < 0) {
-		fprintf(stderr, "ERROR: can't access to '%s'\n", dstdir);
-		return 12;
-	}
-
-	printf("Create subvolume '%s/%s'\n", dstdir, newname);
-	strncpy(args.name, newname, BTRFS_PATH_NAME_MAX);
-	res = ioctl(fddst, BTRFS_IOC_SUBVOL_CREATE, &args);
-	e = errno;
-
-	close(fddst);
-
-	if(res < 0 ){
-		fprintf( stderr, "ERROR: cannot create subvolume - %s\n",
-			strerror(e));
-		return 11;
-	}
-
-	return 0;
-
-}
-
-int do_fssync(int argc, char **argv)
-{
-	int 	fd, res, e;
-	char	*path = argv[1];
-
-	fd = open_file_or_dir(path);
-	if (fd < 0) {
-		fprintf(stderr, "ERROR: can't access to '%s'\n", path);
-		return 12;
-	}
-
-	printf("FSSync '%s'\n", path);
-	res = ioctl(fd, BTRFS_IOC_SYNC);
-	e = errno;
-	close(fd);
-	if( res < 0 ){
-		fprintf(stderr, "ERROR: unable to fs-syncing '%s' - %s\n", 
-			path, strerror(e));
-		return 16;
-	}
-
-	return 0;
-}
-
-int do_scan(int argc, char **argv)
-{
-	int	i, fd, e;
-	int	checklist = 1;
-	int	devstart = 1;
-
-	if( argc >= 2 && !strcmp(argv[1],"--all-devices")){
-
-		if( argc >2 ){
-			fprintf(stderr, "ERROR: too may arguments\n");
-                        return 22;
-                }
-
-		checklist = 0;
-		devstart += 1;
-	}
-
-	if(argc<=devstart){
-
-		int ret;
-
-		printf("Scanning for Btrfs filesystems\n");
-		if(checklist)
-			ret = btrfs_scan_block_devices(1);
-		else
-			ret = btrfs_scan_one_dir("/dev", 1);
-		if (ret){
-			fprintf(stderr, "ERROR: error %d while scanning\n", ret);
-			return 18;
-		}
-		return 0;
-	}
-
-	fd = open("/dev/btrfs-control", O_RDWR);
-	if (fd < 0) {
-		perror("failed to open /dev/btrfs-control");
-		return 10;
-	}
-
-	for( i = devstart ; i < argc ; i++ ){
-		struct btrfs_ioctl_vol_args args;
-		int ret;
-
-		printf("Scanning for Btrfs filesystems in '%s'\n", argv[i]);
-
-		strncpy(args.name, argv[i], BTRFS_PATH_NAME_MAX);
-		/*
-		 * FIXME: which are the error code returned by this ioctl ?
-		 * it seems that is impossible to understand if there no is
-		 * a btrfs filesystem from an I/O error !!!
-		 */
-		ret = ioctl(fd, BTRFS_IOC_SCAN_DEV, &args);
-		e = errno;
-
-		if( ret < 0 ){
-			close(fd);
-			fprintf(stderr, "ERROR: unable to scan the device '%s' - %s\n", 
-				argv[i], strerror(e));
-			return 11;
-		}
-	}
-
-	close(fd);
-	return 0;
-
-}
-
-int do_resize(int argc, char **argv)
-{
-
-	struct btrfs_ioctl_vol_args	args;
-	int	fd, res, len, e;
-	char	*amount=argv[1], *path=argv[2];
-
-	fd = open_file_or_dir(path);
-	if (fd < 0) {
-		fprintf(stderr, "ERROR: can't access to '%s'\n", path);
-		return 12;
-	}
-	len = strlen(amount);
-	if (len == 0 || len >= BTRFS_VOL_NAME_MAX) {
-		fprintf(stderr, "ERROR: size value too long ('%s)\n",
-			amount);
-		return 14;
-	}
-
-	printf("Resize '%s' of '%s'\n", path, amount);
-	strncpy(args.name, amount, BTRFS_PATH_NAME_MAX);
-	res = ioctl(fd, BTRFS_IOC_RESIZE, &args);
-	e = errno;
-	close(fd);
-	if( res < 0 ){
-		fprintf(stderr, "ERROR: unable to resize '%s' - %s\n", 
-			path, strerror(e));
-		return 30;
-	}
-	return 0;
-}
-
-static int uuid_search(struct btrfs_fs_devices *fs_devices, char *search)
-{
-	struct list_head *cur;
-	struct btrfs_device *device;
-
-	list_for_each(cur, &fs_devices->devices) {
-		device = list_entry(cur, struct btrfs_device, dev_list);
-		if ((device->label && strcmp(device->label, search) == 0) ||
-		    strcmp(device->name, search) == 0)
-			return 1;
-	}
-	return 0;
-}
-
-static void print_one_uuid(struct btrfs_fs_devices *fs_devices)
-{
-	char uuidbuf[37];
-	struct list_head *cur;
-	struct btrfs_device *device;
-	char *super_bytes_used;
-	u64 devs_found = 0;
-	u64 total;
-
-	uuid_unparse(fs_devices->fsid, uuidbuf);
-	device = list_entry(fs_devices->devices.next, struct btrfs_device,
-			    dev_list);
-	if (device->label && device->label[0])
-		printf("Label: '%s' ", device->label);
-	else
-		printf("Label: none ");
-
-	super_bytes_used = pretty_sizes(device->super_bytes_used);
-
-	total = device->total_devs;
-	printf(" uuid: %s\n\tTotal devices %llu FS bytes used %s\n", uuidbuf,
-	       (unsigned long long)total, super_bytes_used);
-
-	free(super_bytes_used);
-
-	list_for_each(cur, &fs_devices->devices) {
-		char *total_bytes;
-		char *bytes_used;
-		device = list_entry(cur, struct btrfs_device, dev_list);
-		total_bytes = pretty_sizes(device->total_bytes);
-		bytes_used = pretty_sizes(device->bytes_used);
-		printf("\tdevid %4llu size %s used %s path %s\n",
-		       (unsigned long long)device->devid,
-		       total_bytes, bytes_used, device->name);
-		free(total_bytes);
-		free(bytes_used);
-		devs_found++;
-	}
-	if (devs_found < total) {
-		printf("\t*** Some devices missing\n");
-	}
-	printf("\n");
-}
-
-int do_show_filesystem(int argc, char **argv)
-{
-	struct list_head *all_uuids;
-	struct btrfs_fs_devices *fs_devices;
-	struct list_head *cur_uuid;
-	char *search = 0;
-	int ret;
-	int checklist = 1;
-	int searchstart = 1;
-
-	if( argc >= 2 && !strcmp(argv[1],"--all-devices")){
-		checklist = 0;
-		searchstart += 1;
-	}
-
-	if( argc > searchstart+1 ){
-		fprintf(stderr, "ERROR: too many arguments\n");
-		return 22;
-	}	
-
-	if(checklist)
-		ret = btrfs_scan_block_devices(0);
-	else
-		ret = btrfs_scan_one_dir("/dev", 0);
-
-	if (ret){
-		fprintf(stderr, "ERROR: error %d while scanning\n", ret);
-		return 18;
-	}
-	
-	if(searchstart < argc)
-		search = argv[searchstart];
-
-	all_uuids = btrfs_scanned_uuids();
-	list_for_each(cur_uuid, all_uuids) {
-		fs_devices = list_entry(cur_uuid, struct btrfs_fs_devices,
-					list);
-		if (search && uuid_search(fs_devices, search) == 0)
-			continue;
-		print_one_uuid(fs_devices);
-	}
-	printf("%s\n", BTRFS_BUILD_VERSION);
-	return 0;
-}
-
-int do_add_volume(int nargs, char **args)
-{
-
-	char	*mntpnt = args[nargs-1];
-	int	i, fdmnt, ret=0, e;
-
-
-	fdmnt = open_file_or_dir(mntpnt);
-	if (fdmnt < 0) {
-		fprintf(stderr, "ERROR: can't access to '%s'\n", mntpnt);
-		return 12;
-	}
-
-	for (i = 1; i < (nargs-1); i++ ){
-		struct btrfs_ioctl_vol_args ioctl_args;
-		int	devfd, res;
-		u64 dev_block_count = 0;
-		struct stat st;
-		int mixed = 0;
-
-		res = check_mounted(args[i]);
-		if (res < 0) {
-			fprintf(stderr, "error checking %s mount status\n",
-				args[i]);
-			ret++;
-			continue;
-		}
-		if (res == 1) {
-			fprintf(stderr, "%s is mounted\n", args[i]);
-			ret++;
-			continue;
-		}
-
-		devfd = open(args[i], O_RDWR);
-		if (!devfd) {
-			fprintf(stderr, "ERROR: Unable to open device '%s'\n", args[i]);
-			close(devfd);
-			ret++;
-			continue;
-		}
-		res = fstat(devfd, &st);
-		if (res) {
-			fprintf(stderr, "ERROR: Unable to stat '%s'\n", args[i]);
-			close(devfd);
-			ret++;
-			continue;
-		}
-		if (!S_ISBLK(st.st_mode)) {
-			fprintf(stderr, "ERROR: '%s' is not a block device\n", args[i]);
-			close(devfd);
-			ret++;
-			continue;
-		}
-
-		res = btrfs_prepare_device(devfd, args[i], 1, &dev_block_count, &mixed);
-		if (res) {
-			fprintf(stderr, "ERROR: Unable to init '%s'\n", args[i]);
-			close(devfd);
-			ret++;
-			continue;
-		}
-		close(devfd);
-
-		strncpy(ioctl_args.name, args[i], BTRFS_PATH_NAME_MAX);
-		res = ioctl(fdmnt, BTRFS_IOC_ADD_DEV, &ioctl_args);
-		e = errno;
-		if(res<0){
-			fprintf(stderr, "ERROR: error adding the device '%s' - %s\n", 
-				args[i], strerror(e));
-			ret++;
-		}
-
-	}
-
-	close(fdmnt);
-	if (ret)
-		return ret+20;
-	else
-		return 0;
-
-}
-
-int do_balance(int argc, char **argv)
-{
-
-	int	fdmnt, ret=0, e;
-	struct btrfs_ioctl_vol_args args;
-	char	*path = argv[1];
-
-	fdmnt = open_file_or_dir(path);
-	if (fdmnt < 0) {
-		fprintf(stderr, "ERROR: can't access to '%s'\n", path);
-		return 12;
-	}
-
-	memset(&args, 0, sizeof(args));
-	ret = ioctl(fdmnt, BTRFS_IOC_BALANCE, &args);
-	e = errno;
-	close(fdmnt);
-	if(ret<0){
-		fprintf(stderr, "ERROR: error during balancing '%s' - %s\n", 
-			path, strerror(e));
-
-		return 19;
-	}
-	return 0;
-}
-int do_remove_volume(int nargs, char **args)
-{
-
-	char	*mntpnt = args[nargs-1];
-	int	i, fdmnt, ret=0, e;
-
-	fdmnt = open_file_or_dir(mntpnt);
-	if (fdmnt < 0) {
-		fprintf(stderr, "ERROR: can't access to '%s'\n", mntpnt);
-		return 12;
-	}
-
-	for(i=1 ; i < (nargs-1) ; i++ ){
-		struct	btrfs_ioctl_vol_args arg;
-		int	res;
-
-		strncpy(arg.name, args[i], BTRFS_PATH_NAME_MAX);
-		res = ioctl(fdmnt, BTRFS_IOC_RM_DEV, &arg);
-		e = errno;
-		if(res<0){
-			fprintf(stderr, "ERROR: error removing the device '%s' - %s\n", 
-				args[i], strerror(e));
-			ret++;
-		}
-	}
-
-	close(fdmnt);
-	if( ret)
-		return ret+20;
-	else
-		return 0;
-}
-
-int do_set_default_subvol(int nargs, char **argv)
-{
-	int	ret=0, fd, e;
-	u64	objectid;
-	char	*path = argv[2];
-	char	*subvolid = argv[1];
-
-	fd = open_file_or_dir(path);
-	if (fd < 0) {
-		fprintf(stderr, "ERROR: can't access to '%s'\n", path);
-		return 12;
-	}
-
-	objectid = (unsigned long long)strtoll(subvolid, NULL, 0);
-	if (errno == ERANGE) {
-		fprintf(stderr, "ERROR: invalid tree id (%s)\n",subvolid);
-		return 30;
-	}
-	ret = ioctl(fd, BTRFS_IOC_DEFAULT_SUBVOL, &objectid);
-	e = errno;
-	close(fd);
-	if( ret < 0 ){
-		fprintf(stderr, "ERROR: unable to set a new default subvolume - %s\n",
-			strerror(e));
-		return 30;
-	}
-	return 0;
-}
-
-int do_change_label(int nargs, char **argv)
-{
-	/* check the number of argument */
-	if ( nargs > 3 ){
-		fprintf(stderr, "ERROR: '%s' requires maximum 2 args\n",
-			argv[0]);
-		return -2;
-	}else if (nargs == 2){
-		return get_label(argv[1]);
-	} else {	/* nargs == 0 */
-		return set_label(argv[1], argv[2]);
-	}
-}
-
-
-int do_get_default_subvol(int nargs, char **argv)
-{
-	int fd;
-	int ret;
-	char *subvol;
-
-	subvol = argv[1];
-
-	ret = test_issubvolume(subvol);
-	if (ret < 0) {
-		fprintf(stderr, "ERROR: error accessing '%s'\n", subvol);
-		return 12;
-	}
-	if (!ret) {
-		fprintf(stderr, "ERROR: '%s' is not a subvolume\n", subvol);
-		return 13;
-	}
-
-	fd = open_file_or_dir(subvol);
-	if (fd < 0) {
-		fprintf(stderr, "ERROR: can't access '%s'\n", subvol);
-		return 12;
-	}
-	ret = list_subvols(fd, 0, 1);
-	if (ret)
-		return 19;
-	return 0;
-}
-
-int do_df_filesystem(int nargs, char **argv)
-{
-	struct btrfs_ioctl_space_args *sargs;
-	u64 count = 0, i;
-	int ret;
-	int fd;
-	int e;
-	char *path = argv[1];
-
-	fd = open_file_or_dir(path);
-	if (fd < 0) {
-		fprintf(stderr, "ERROR: can't access to '%s'\n", path);
-		return 12;
-	}
-
-	sargs = malloc(sizeof(struct btrfs_ioctl_space_args));
-	if (!sargs)
-		return -ENOMEM;
-
-	sargs->space_slots = 0;
-	sargs->total_spaces = 0;
-
-	ret = ioctl(fd, BTRFS_IOC_SPACE_INFO, sargs);
-	e = errno;
-	if (ret) {
-		fprintf(stderr, "ERROR: couldn't get space info on '%s' - %s\n",
-			path, strerror(e));
-		free(sargs);
-		return ret;
-	}
-	if (!sargs->total_spaces)
-		return 0;
-
-	count = sargs->total_spaces;
-
-	sargs = realloc(sargs, sizeof(struct btrfs_ioctl_space_args) +
-			(count * sizeof(struct btrfs_ioctl_space_info)));
-	if (!sargs)
-		return -ENOMEM;
-
-	sargs->space_slots = count;
-	sargs->total_spaces = 0;
-
-	ret = ioctl(fd, BTRFS_IOC_SPACE_INFO, sargs);
-	e = errno;
-	if (ret) {
-		fprintf(stderr, "ERROR: couldn't get space info on '%s' - %s\n",
-			path, strerror(e));
-		close(fd);
-		free(sargs);
-		return ret;
-	}
-
-	for (i = 0; i < sargs->total_spaces; i++) {
-		char description[80];
-		char *total_bytes;
-		char *used_bytes;
-		int written = 0;
-		u64 flags = sargs->spaces[i].flags;
-
-		memset(description, 0, 80);
-
-		if (flags & BTRFS_BLOCK_GROUP_DATA) {
-			if (flags & BTRFS_BLOCK_GROUP_METADATA) {
-				snprintf(description, 14, "%s",
-					 "Data+Metadata");
-				written += 13;
-			} else {
-				snprintf(description, 5, "%s", "Data");
-				written += 4;
-			}
-		} else if (flags & BTRFS_BLOCK_GROUP_SYSTEM) {
-			snprintf(description, 7, "%s", "System");
-			written += 6;
-		} else if (flags & BTRFS_BLOCK_GROUP_METADATA) {
-			snprintf(description, 9, "%s", "Metadata");
-			written += 8;
-		}
-
-		if (flags & BTRFS_BLOCK_GROUP_RAID0) {
-			snprintf(description+written, 8, "%s", ", RAID0");
-			written += 7;
-		} else if (flags & BTRFS_BLOCK_GROUP_RAID1) {
-			snprintf(description+written, 8, "%s", ", RAID1");
-			written += 7;
-		} else if (flags & BTRFS_BLOCK_GROUP_DUP) {
-			snprintf(description+written, 6, "%s", ", DUP");
-			written += 5;
-		} else if (flags & BTRFS_BLOCK_GROUP_RAID10) {
-			snprintf(description+written, 9, "%s", ", RAID10");
-			written += 8;
-		}
-
-		total_bytes = pretty_sizes(sargs->spaces[i].total_bytes);
-		used_bytes = pretty_sizes(sargs->spaces[i].used_bytes);
-		printf("%s: total=%s, used=%s\n", description, total_bytes,
-		       used_bytes);
-	}
-	free(sargs);
-
-	return 0;
-}
-
-static int __ino_to_path_fd(u64 inum, int fd, int verbose, const char *prepend)
-{
-	int ret;
-	int i;
-	struct btrfs_ioctl_ino_path_args ipa;
-	struct btrfs_data_container *fspath;
-
-	fspath = malloc(4096);
-	if (!fspath)
-		return 1;
-
-	ipa.inum = inum;
-	ipa.size = 4096;
-	ipa.fspath = (u64)fspath;
-
-	ret = ioctl(fd, BTRFS_IOC_INO_PATHS, &ipa);
-	if (ret) {
-		printf("ioctl ret=%d, error: %s\n", ret, strerror(errno));
-		goto out;
-	}
-
-	if (verbose)
-		printf("ioctl ret=%d, bytes_left=%lu, bytes_missing=%lu, "
-			"cnt=%d, missed=%d\n", ret,
-			(unsigned long)fspath->bytes_left,
-			(unsigned long)fspath->bytes_missing,
-			fspath->elem_cnt, fspath->elem_missed);
-
-	for (i = 0; i < fspath->elem_cnt; ++i) {
-		char **str = (char **)fspath->val;
-		str[i] += (unsigned long)fspath->val;
-		if (prepend)
-			printf("%s/%s\n", prepend, str[i]);
-		else
-			printf("%s\n", str[i]);
-	}
-
-out:
-	free(fspath);
-	return ret;
-}
-
-int do_ino_to_path(int nargs, char **argv)
-{
-	int fd;
-	int verbose = 0;
-
-	optind = 1;
-	while (1) {
-		int c = getopt(nargs, argv, "v");
-		if (c < 0)
-			break;
-		switch (c) {
-		case 'v':
-			verbose = 1;
-			break;
-		default:
-			fprintf(stderr, "invalid arguments for ipath\n");
-			return 1;
-		}
-	}
-	if (nargs - optind != 2) {
-		fprintf(stderr, "invalid arguments for ipath\n");
-		return 1;
-	}
-
-	fd = open_file_or_dir(argv[optind+1]);
-	if (fd < 0) {
-		fprintf(stderr, "ERROR: can't access '%s'\n", argv[optind+1]);
-		return 12;
-	}
-
-	return __ino_to_path_fd(atoll(argv[optind]), fd, verbose,
-				argv[optind+1]);
-}
-
-int do_logical_to_ino(int nargs, char **argv)
-{
-	int ret;
-	int fd;
-	int i;
-	int verbose = 0;
-	int getpath = 1;
-	int bytes_left;
-	struct btrfs_ioctl_logical_ino_args loi;
-	struct btrfs_data_container *inodes;
-	char full_path[4096];
-	char *path_ptr;
-
-	optind = 1;
-	while (1) {
-		int c = getopt(nargs, argv, "Pv");
-		if (c < 0)
-			break;
-		switch (c) {
-		case 'P':
-			getpath = 0;
-			break;
-		case 'v':
-			verbose = 1;
-			break;
-		default:
-			fprintf(stderr, "invalid arguments for ipath\n");
-			return 1;
-		}
-	}
-	if (nargs - optind != 2) {
-		fprintf(stderr, "invalid arguments for ipath\n");
-		return 1;
-	}
-
-	inodes = malloc(4096);
-	if (!inodes)
-		return 1;
-
-	loi.logical = atoll(argv[optind]);
-	loi.size = 4096;
-	loi.inodes = (u64)inodes;
-
-	fd = open_file_or_dir(argv[optind+1]);
-	if (fd < 0) {
-		fprintf(stderr, "ERROR: can't access '%s'\n", argv[optind+1]);
-		ret = 12;
-		goto out;
-	}
-
-	ret = ioctl(fd, BTRFS_IOC_LOGICAL_INO, &loi);
-	if (ret) {
-		printf("ioctl ret=%d, error: %s\n", ret, strerror(errno));
-		goto out;
-	}
-
-	if (verbose)
-		printf("ioctl ret=%d, bytes_left=%lu, bytes_missing=%lu, "
-			"cnt=%d, missed=%d\n", ret,
-			(unsigned long)inodes->bytes_left,
-			(unsigned long)inodes->bytes_missing,
-			inodes->elem_cnt, inodes->elem_missed);
-
-	bytes_left = sizeof(full_path);
-	ret = snprintf(full_path, bytes_left, "%s/", argv[optind+1]);
-	path_ptr = full_path + ret;
-	bytes_left -= ret + 1;
-	BUG_ON(bytes_left < 0);
-
-	for (i = 0; i < inodes->elem_cnt; i += 3) {
-		u64 inum = inodes->val[i];
-		u64 offset = inodes->val[i+1];
-		u64 root = inodes->val[i+2];
-		int path_fd;
-		char *name;
-
-		if (getpath) {
-			name = path_for_root(fd, root);
-			if (IS_ERR(name))
-				return PTR_ERR(name);
-			if (!name) {
-				path_ptr[-1] = '\0';
-				path_fd = fd;
-			} else {
-				path_ptr[-1] = '/';
-				ret = snprintf(path_ptr, bytes_left, "%s",
-						name);
-				BUG_ON(ret >= bytes_left);
-				free(name);
-				path_fd = open_file_or_dir(full_path);
-				if (path_fd < 0) {
-					fprintf(stderr, "ERROR: can't access "
-						"'%s'\n", full_path);
-					goto out;
-				}
-			}
-			__ino_to_path_fd(inum, path_fd, verbose, full_path);
-		} else {
-			printf("inode %llu offset %llu root %llu\n", inum,
-				offset, root);
-		}
-	}
-
-out:
-	free(inodes);
-	return ret;
-}
diff --git a/btrfs_cmds.h b/btrfs_cmds.h
index 81182b1..efca7c5 100644
--- a/btrfs_cmds.h
+++ b/btrfs_cmds.h
@@ -33,12 +33,9 @@ int do_resize(int nargs, char **argv);
 int do_subvol_list(int nargs, char **argv);
 int do_set_default_subvol(int nargs, char **argv);
 int do_get_default_subvol(int nargs, char **argv);
-int list_subvols(int fd, int print_parent, int get_default);
 int do_df_filesystem(int nargs, char **argv);
-int find_updated_files(int fd, u64 root_id, u64 oldest_gen);
 int do_find_newer(int argc, char **argv);
 int do_change_label(int argc, char **argv);
 int open_file_or_dir(const char *fname);
 int do_ino_to_path(int nargs, char **argv);
 int do_logical_to_ino(int nargs, char **argv);
-char *path_for_root(int fd, u64 root);
diff --git a/cmds-device.c b/cmds-device.c
new file mode 100644
index 0000000..0fc4c7f
--- /dev/null
+++ b/cmds-device.c
@@ -0,0 +1,223 @@
+/*
+ * 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.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+#include <errno.h>
+#include <sys/stat.h>
+
+#include "kerncompat.h"
+#include "ctree.h"
+#include "ioctl.h"
+#include "utils.h"
+
+#include "btrfs_cmds.h"
+
+/* FIXME - imported cruft, fix sparse errors and warnings */
+#ifdef __CHECKER__
+#define BLKGETSIZE64 0
+#define BTRFS_IOC_SNAP_CREATE_V2 0
+#define BTRFS_VOL_NAME_MAX 255
+struct btrfs_ioctl_vol_args { char name[BTRFS_VOL_NAME_MAX]; };
+static inline int ioctl(int fd, int define, void *arg) { return 0; }
+#endif
+
+int do_add_volume(int nargs, char **args)
+{
+
+	char	*mntpnt = args[nargs-1];
+	int	i, fdmnt, ret=0, e;
+
+
+	fdmnt = open_file_or_dir(mntpnt);
+	if (fdmnt < 0) {
+		fprintf(stderr, "ERROR: can't access to '%s'\n", mntpnt);
+		return 12;
+	}
+
+	for (i = 1; i < (nargs-1); i++ ){
+		struct btrfs_ioctl_vol_args ioctl_args;
+		int	devfd, res;
+		u64 dev_block_count = 0;
+		struct stat st;
+		int mixed = 0;
+
+		res = check_mounted(args[i]);
+		if (res < 0) {
+			fprintf(stderr, "error checking %s mount status\n",
+				args[i]);
+			ret++;
+			continue;
+		}
+		if (res == 1) {
+			fprintf(stderr, "%s is mounted\n", args[i]);
+			ret++;
+			continue;
+		}
+
+		devfd = open(args[i], O_RDWR);
+		if (!devfd) {
+			fprintf(stderr, "ERROR: Unable to open device '%s'\n", args[i]);
+			close(devfd);
+			ret++;
+			continue;
+		}
+		res = fstat(devfd, &st);
+		if (res) {
+			fprintf(stderr, "ERROR: Unable to stat '%s'\n", args[i]);
+			close(devfd);
+			ret++;
+			continue;
+		}
+		if (!S_ISBLK(st.st_mode)) {
+			fprintf(stderr, "ERROR: '%s' is not a block device\n", args[i]);
+			close(devfd);
+			ret++;
+			continue;
+		}
+
+		res = btrfs_prepare_device(devfd, args[i], 1, &dev_block_count, &mixed);
+		if (res) {
+			fprintf(stderr, "ERROR: Unable to init '%s'\n", args[i]);
+			close(devfd);
+			ret++;
+			continue;
+		}
+		close(devfd);
+
+		strncpy(ioctl_args.name, args[i], BTRFS_PATH_NAME_MAX);
+		res = ioctl(fdmnt, BTRFS_IOC_ADD_DEV, &ioctl_args);
+		e = errno;
+		if(res<0){
+			fprintf(stderr, "ERROR: error adding the device '%s' - %s\n", 
+				args[i], strerror(e));
+			ret++;
+		}
+
+	}
+
+	close(fdmnt);
+	if (ret)
+		return ret+20;
+	else
+		return 0;
+
+}
+
+int do_remove_volume(int nargs, char **args)
+{
+
+	char	*mntpnt = args[nargs-1];
+	int	i, fdmnt, ret=0, e;
+
+	fdmnt = open_file_or_dir(mntpnt);
+	if (fdmnt < 0) {
+		fprintf(stderr, "ERROR: can't access to '%s'\n", mntpnt);
+		return 12;
+	}
+
+	for(i=1 ; i < (nargs-1) ; i++ ){
+		struct	btrfs_ioctl_vol_args arg;
+		int	res;
+
+		strncpy(arg.name, args[i], BTRFS_PATH_NAME_MAX);
+		res = ioctl(fdmnt, BTRFS_IOC_RM_DEV, &arg);
+		e = errno;
+		if(res<0){
+			fprintf(stderr, "ERROR: error removing the device '%s' - %s\n", 
+				args[i], strerror(e));
+			ret++;
+		}
+	}
+
+	close(fdmnt);
+	if( ret)
+		return ret+20;
+	else
+		return 0;
+}
+
+int do_scan(int argc, char **argv)
+{
+	int	i, fd, e;
+	int	checklist = 1;
+	int	devstart = 1;
+
+	if( argc >= 2 && !strcmp(argv[1],"--all-devices")){
+
+		if( argc >2 ){
+			fprintf(stderr, "ERROR: too may arguments\n");
+                        return 22;
+                }
+
+		checklist = 0;
+		devstart += 1;
+	}
+
+	if(argc<=devstart){
+
+		int ret;
+
+		printf("Scanning for Btrfs filesystems\n");
+		if(checklist)
+			ret = btrfs_scan_block_devices(1);
+		else
+			ret = btrfs_scan_one_dir("/dev", 1);
+		if (ret){
+			fprintf(stderr, "ERROR: error %d while scanning\n", ret);
+			return 18;
+		}
+		return 0;
+	}
+
+	fd = open("/dev/btrfs-control", O_RDWR);
+	if (fd < 0) {
+		perror("failed to open /dev/btrfs-control");
+		return 10;
+	}
+
+	for( i = devstart ; i < argc ; i++ ){
+		struct btrfs_ioctl_vol_args args;
+		int ret;
+
+		printf("Scanning for Btrfs filesystems in '%s'\n", argv[i]);
+
+		strncpy(args.name, argv[i], BTRFS_PATH_NAME_MAX);
+		/*
+		 * FIXME: which are the error code returned by this ioctl ?
+		 * it seems that is impossible to understand if there no is
+		 * a btrfs filesystem from an I/O error !!!
+		 */
+		ret = ioctl(fd, BTRFS_IOC_SCAN_DEV, &args);
+		e = errno;
+
+		if( ret < 0 ){
+			close(fd);
+			fprintf(stderr, "ERROR: unable to scan the device '%s' - %s\n", 
+				argv[i], strerror(e));
+			return 11;
+		}
+	}
+
+	close(fd);
+	return 0;
+
+}
+
diff --git a/cmds-filesystem.c b/cmds-filesystem.c
new file mode 100644
index 0000000..2e607d2
--- /dev/null
+++ b/cmds-filesystem.c
@@ -0,0 +1,488 @@
+/*
+ * 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.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/ioctl.h>
+#include <errno.h>
+#include <uuid/uuid.h>
+#include <ctype.h>
+
+#include "kerncompat.h"
+#include "ctree.h"
+#include "ioctl.h"
+#include "utils.h"
+#include "volumes.h"
+
+#include "version.h"
+
+#include "btrfs_cmds.h"
+#include "btrfslabel.h"
+
+int do_df_filesystem(int nargs, char **argv)
+{
+	struct btrfs_ioctl_space_args *sargs;
+	u64 count = 0, i;
+	int ret;
+	int fd;
+	int e;
+	char *path = argv[1];
+
+	fd = open_file_or_dir(path);
+	if (fd < 0) {
+		fprintf(stderr, "ERROR: can't access to '%s'\n", path);
+		return 12;
+	}
+
+	sargs = malloc(sizeof(struct btrfs_ioctl_space_args));
+	if (!sargs)
+		return -ENOMEM;
+
+	sargs->space_slots = 0;
+	sargs->total_spaces = 0;
+
+	ret = ioctl(fd, BTRFS_IOC_SPACE_INFO, sargs);
+	e = errno;
+	if (ret) {
+		fprintf(stderr, "ERROR: couldn't get space info on '%s' - %s\n",
+			path, strerror(e));
+		free(sargs);
+		return ret;
+	}
+	if (!sargs->total_spaces)
+		return 0;
+
+	count = sargs->total_spaces;
+
+	sargs = realloc(sargs, sizeof(struct btrfs_ioctl_space_args) +
+			(count * sizeof(struct btrfs_ioctl_space_info)));
+	if (!sargs)
+		return -ENOMEM;
+
+	sargs->space_slots = count;
+	sargs->total_spaces = 0;
+
+	ret = ioctl(fd, BTRFS_IOC_SPACE_INFO, sargs);
+	e = errno;
+	if (ret) {
+		fprintf(stderr, "ERROR: couldn't get space info on '%s' - %s\n",
+			path, strerror(e));
+		close(fd);
+		free(sargs);
+		return ret;
+	}
+
+	for (i = 0; i < sargs->total_spaces; i++) {
+		char description[80];
+		char *total_bytes;
+		char *used_bytes;
+		int written = 0;
+		u64 flags = sargs->spaces[i].flags;
+
+		memset(description, 0, 80);
+
+		if (flags & BTRFS_BLOCK_GROUP_DATA) {
+			if (flags & BTRFS_BLOCK_GROUP_METADATA) {
+				snprintf(description, 14, "%s",
+					 "Data+Metadata");
+				written += 13;
+			} else {
+				snprintf(description, 5, "%s", "Data");
+				written += 4;
+			}
+		} else if (flags & BTRFS_BLOCK_GROUP_SYSTEM) {
+			snprintf(description, 7, "%s", "System");
+			written += 6;
+		} else if (flags & BTRFS_BLOCK_GROUP_METADATA) {
+			snprintf(description, 9, "%s", "Metadata");
+			written += 8;
+		}
+
+		if (flags & BTRFS_BLOCK_GROUP_RAID0) {
+			snprintf(description+written, 8, "%s", ", RAID0");
+			written += 7;
+		} else if (flags & BTRFS_BLOCK_GROUP_RAID1) {
+			snprintf(description+written, 8, "%s", ", RAID1");
+			written += 7;
+		} else if (flags & BTRFS_BLOCK_GROUP_DUP) {
+			snprintf(description+written, 6, "%s", ", DUP");
+			written += 5;
+		} else if (flags & BTRFS_BLOCK_GROUP_RAID10) {
+			snprintf(description+written, 9, "%s", ", RAID10");
+			written += 8;
+		}
+
+		total_bytes = pretty_sizes(sargs->spaces[i].total_bytes);
+		used_bytes = pretty_sizes(sargs->spaces[i].used_bytes);
+		printf("%s: total=%s, used=%s\n", description, total_bytes,
+		       used_bytes);
+	}
+	free(sargs);
+
+	return 0;
+}
+
+static int uuid_search(struct btrfs_fs_devices *fs_devices, char *search)
+{
+	struct list_head *cur;
+	struct btrfs_device *device;
+
+	list_for_each(cur, &fs_devices->devices) {
+		device = list_entry(cur, struct btrfs_device, dev_list);
+		if ((device->label && strcmp(device->label, search) == 0) ||
+		    strcmp(device->name, search) == 0)
+			return 1;
+	}
+	return 0;
+}
+
+static void print_one_uuid(struct btrfs_fs_devices *fs_devices)
+{
+	char uuidbuf[37];
+	struct list_head *cur;
+	struct btrfs_device *device;
+	char *super_bytes_used;
+	u64 devs_found = 0;
+	u64 total;
+
+	uuid_unparse(fs_devices->fsid, uuidbuf);
+	device = list_entry(fs_devices->devices.next, struct btrfs_device,
+			    dev_list);
+	if (device->label && device->label[0])
+		printf("Label: '%s' ", device->label);
+	else
+		printf("Label: none ");
+
+	super_bytes_used = pretty_sizes(device->super_bytes_used);
+
+	total = device->total_devs;
+	printf(" uuid: %s\n\tTotal devices %llu FS bytes used %s\n", uuidbuf,
+	       (unsigned long long)total, super_bytes_used);
+
+	free(super_bytes_used);
+
+	list_for_each(cur, &fs_devices->devices) {
+		char *total_bytes;
+		char *bytes_used;
+		device = list_entry(cur, struct btrfs_device, dev_list);
+		total_bytes = pretty_sizes(device->total_bytes);
+		bytes_used = pretty_sizes(device->bytes_used);
+		printf("\tdevid %4llu size %s used %s path %s\n",
+		       (unsigned long long)device->devid,
+		       total_bytes, bytes_used, device->name);
+		free(total_bytes);
+		free(bytes_used);
+		devs_found++;
+	}
+	if (devs_found < total) {
+		printf("\t*** Some devices missing\n");
+	}
+	printf("\n");
+}
+
+int do_show_filesystem(int argc, char **argv)
+{
+	struct list_head *all_uuids;
+	struct btrfs_fs_devices *fs_devices;
+	struct list_head *cur_uuid;
+	char *search = 0;
+	int ret;
+	int checklist = 1;
+	int searchstart = 1;
+
+	if( argc >= 2 && !strcmp(argv[1],"--all-devices")){
+		checklist = 0;
+		searchstart += 1;
+	}
+
+	if( argc > searchstart+1 ){
+		fprintf(stderr, "ERROR: too many arguments\n");
+		return 22;
+	}	
+
+	if(checklist)
+		ret = btrfs_scan_block_devices(0);
+	else
+		ret = btrfs_scan_one_dir("/dev", 0);
+
+	if (ret){
+		fprintf(stderr, "ERROR: error %d while scanning\n", ret);
+		return 18;
+	}
+	
+	if(searchstart < argc)
+		search = argv[searchstart];
+
+	all_uuids = btrfs_scanned_uuids();
+	list_for_each(cur_uuid, all_uuids) {
+		fs_devices = list_entry(cur_uuid, struct btrfs_fs_devices,
+					list);
+		if (search && uuid_search(fs_devices, search) == 0)
+			continue;
+		print_one_uuid(fs_devices);
+	}
+	printf("%s\n", BTRFS_BUILD_VERSION);
+	return 0;
+}
+
+int do_fssync(int argc, char **argv)
+{
+	int 	fd, res, e;
+	char	*path = argv[1];
+
+	fd = open_file_or_dir(path);
+	if (fd < 0) {
+		fprintf(stderr, "ERROR: can't access to '%s'\n", path);
+		return 12;
+	}
+
+	printf("FSSync '%s'\n", path);
+	res = ioctl(fd, BTRFS_IOC_SYNC);
+	e = errno;
+	close(fd);
+	if( res < 0 ){
+		fprintf(stderr, "ERROR: unable to fs-syncing '%s' - %s\n", 
+			path, strerror(e));
+		return 16;
+	}
+
+	return 0;
+}
+
+static u64 parse_size(char *s)
+{
+	int len = strlen(s);
+	char c;
+	u64 mult = 1;
+
+	if (!isdigit(s[len - 1])) {
+		c = tolower(s[len - 1]);
+		switch (c) {
+		case 'g':
+			mult *= 1024;
+		case 'm':
+			mult *= 1024;
+		case 'k':
+			mult *= 1024;
+		case 'b':
+			break;
+		default:
+			fprintf(stderr, "Unknown size descriptor %c\n", c);
+			exit(1);
+		}
+		s[len - 1] = '\0';
+	}
+	return atoll(s) * mult;
+}
+
+static int parse_compress_type(char *s)
+{
+	if (strcmp(optarg, "zlib") == 0)
+		return BTRFS_COMPRESS_ZLIB;
+	else if (strcmp(optarg, "lzo") == 0)
+		return BTRFS_COMPRESS_LZO;
+	else {
+		fprintf(stderr, "Unknown compress type %s\n", s);
+		exit(1);
+	};
+}
+
+int do_defrag(int ac, char **av)
+{
+	int fd;
+	int flush = 0;
+	u64 start = 0;
+	u64 len = (u64)-1;
+	u32 thresh = 0;
+	int i;
+	int errors = 0;
+	int ret = 0;
+	int verbose = 0;
+	int fancy_ioctl = 0;
+	struct btrfs_ioctl_defrag_range_args range;
+	int e=0;
+	int compress_type = BTRFS_COMPRESS_NONE;
+
+	optind = 1;
+	while(1) {
+		int c = getopt(ac, av, "vc::fs:l:t:");
+		if (c < 0)
+			break;
+		switch(c) {
+		case 'c':
+			compress_type = BTRFS_COMPRESS_ZLIB;
+			if (optarg)
+				compress_type = parse_compress_type(optarg);
+			fancy_ioctl = 1;
+			break;
+		case 'f':
+			flush = 1;
+			fancy_ioctl = 1;
+			break;
+		case 'v':
+			verbose = 1;
+			break;
+		case 's':
+			start = parse_size(optarg);
+			fancy_ioctl = 1;
+			break;
+		case 'l':
+			len = parse_size(optarg);
+			fancy_ioctl = 1;
+			break;
+		case 't':
+			thresh = parse_size(optarg);
+			fancy_ioctl = 1;
+			break;
+		default:
+			fprintf(stderr, "Invalid arguments for defragment\n");
+			free(av);
+			return 1;
+		}
+	}
+	if (ac - optind == 0) {
+		fprintf(stderr, "Invalid arguments for defragment\n");
+		free(av);
+		return 1;
+	}
+
+	memset(&range, 0, sizeof(range));
+	range.start = start;
+	range.len = len;
+	range.extent_thresh = thresh;
+	if (compress_type) {
+		range.flags |= BTRFS_DEFRAG_RANGE_COMPRESS;
+		range.compress_type = compress_type;
+	}
+	if (flush)
+		range.flags |= BTRFS_DEFRAG_RANGE_START_IO;
+
+	for (i = optind; i < ac; i++) {
+		if (verbose)
+			printf("%s\n", av[i]);
+		fd = open_file_or_dir(av[i]);
+		if (fd < 0) {
+			fprintf(stderr, "failed to open %s\n", av[i]);
+			perror("open:");
+			errors++;
+			continue;
+		}
+		if (!fancy_ioctl) {
+			ret = ioctl(fd, BTRFS_IOC_DEFRAG, NULL);
+			e=errno;
+		} else {
+			ret = ioctl(fd, BTRFS_IOC_DEFRAG_RANGE, &range);
+			if (ret && errno == ENOTTY) {
+				fprintf(stderr, "ERROR: defrag range ioctl not "
+					"supported in this kernel, please try "
+					"without any options.\n");
+				errors++;
+				close(fd);
+				break;
+			}
+		}
+		if (ret) {
+			fprintf(stderr, "ERROR: defrag failed on %s - %s\n",
+				av[i], strerror(e));
+			errors++;
+		}
+		close(fd);
+	}
+	if (verbose)
+		printf("%s\n", BTRFS_BUILD_VERSION);
+	if (errors) {
+		fprintf(stderr, "total %d failures\n", errors);
+		exit(1);
+	}
+
+	free(av);
+	return errors + 20;
+}
+
+int do_balance(int argc, char **argv)
+{
+
+	int	fdmnt, ret=0, e;
+	struct btrfs_ioctl_vol_args args;
+	char	*path = argv[1];
+
+	fdmnt = open_file_or_dir(path);
+	if (fdmnt < 0) {
+		fprintf(stderr, "ERROR: can't access to '%s'\n", path);
+		return 12;
+	}
+
+	memset(&args, 0, sizeof(args));
+	ret = ioctl(fdmnt, BTRFS_IOC_BALANCE, &args);
+	e = errno;
+	close(fdmnt);
+	if(ret<0){
+		fprintf(stderr, "ERROR: error during balancing '%s' - %s\n", 
+			path, strerror(e));
+
+		return 19;
+	}
+	return 0;
+}
+
+int do_resize(int argc, char **argv)
+{
+
+	struct btrfs_ioctl_vol_args	args;
+	int	fd, res, len, e;
+	char	*amount=argv[1], *path=argv[2];
+
+	fd = open_file_or_dir(path);
+	if (fd < 0) {
+		fprintf(stderr, "ERROR: can't access to '%s'\n", path);
+		return 12;
+	}
+	len = strlen(amount);
+	if (len == 0 || len >= BTRFS_VOL_NAME_MAX) {
+		fprintf(stderr, "ERROR: size value too long ('%s)\n",
+			amount);
+		return 14;
+	}
+
+	printf("Resize '%s' of '%s'\n", path, amount);
+	strncpy(args.name, amount, BTRFS_PATH_NAME_MAX);
+	res = ioctl(fd, BTRFS_IOC_RESIZE, &args);
+	e = errno;
+	close(fd);
+	if( res < 0 ){
+		fprintf(stderr, "ERROR: unable to resize '%s' - %s\n", 
+			path, strerror(e));
+		return 30;
+	}
+	return 0;
+}
+
+int do_change_label(int nargs, char **argv)
+{
+	/* check the number of argument */
+	if ( nargs > 3 ){
+		fprintf(stderr, "ERROR: '%s' requires maximum 2 args\n",
+			argv[0]);
+		return -2;
+	}else if (nargs == 2){
+		return get_label(argv[1]);
+	} else {	/* nargs == 0 */
+		return set_label(argv[1], argv[2]);
+	}
+}
+
diff --git a/cmds-inspect.c b/cmds-inspect.c
new file mode 100644
index 0000000..ca42d7f
--- /dev/null
+++ b/cmds-inspect.c
@@ -0,0 +1,214 @@
+/*
+ * 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.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <sys/ioctl.h>
+#include <errno.h>
+
+#include "kerncompat.h"
+#include "ioctl.h"
+
+#include "btrfs_cmds.h"
+
+/* btrfs-list.c */
+char *path_for_root(int fd, u64 root);
+
+static int __ino_to_path_fd(u64 inum, int fd, int verbose, const char *prepend)
+{
+	int ret;
+	int i;
+	struct btrfs_ioctl_ino_path_args ipa;
+	struct btrfs_data_container *fspath;
+
+	fspath = malloc(4096);
+	if (!fspath)
+		return 1;
+
+	ipa.inum = inum;
+	ipa.size = 4096;
+	ipa.fspath = (u64)fspath;
+
+	ret = ioctl(fd, BTRFS_IOC_INO_PATHS, &ipa);
+	if (ret) {
+		printf("ioctl ret=%d, error: %s\n", ret, strerror(errno));
+		goto out;
+	}
+
+	if (verbose)
+		printf("ioctl ret=%d, bytes_left=%lu, bytes_missing=%lu, "
+			"cnt=%d, missed=%d\n", ret,
+			(unsigned long)fspath->bytes_left,
+			(unsigned long)fspath->bytes_missing,
+			fspath->elem_cnt, fspath->elem_missed);
+
+	for (i = 0; i < fspath->elem_cnt; ++i) {
+		char **str = (char **)fspath->val;
+		str[i] += (unsigned long)fspath->val;
+		if (prepend)
+			printf("%s/%s\n", prepend, str[i]);
+		else
+			printf("%s\n", str[i]);
+	}
+
+out:
+	free(fspath);
+	return ret;
+}
+
+int do_ino_to_path(int nargs, char **argv)
+{
+	int fd;
+	int verbose = 0;
+
+	optind = 1;
+	while (1) {
+		int c = getopt(nargs, argv, "v");
+		if (c < 0)
+			break;
+		switch (c) {
+		case 'v':
+			verbose = 1;
+			break;
+		default:
+			fprintf(stderr, "invalid arguments for ipath\n");
+			return 1;
+		}
+	}
+	if (nargs - optind != 2) {
+		fprintf(stderr, "invalid arguments for ipath\n");
+		return 1;
+	}
+
+	fd = open_file_or_dir(argv[optind+1]);
+	if (fd < 0) {
+		fprintf(stderr, "ERROR: can't access '%s'\n", argv[optind+1]);
+		return 12;
+	}
+
+	return __ino_to_path_fd(atoll(argv[optind]), fd, verbose,
+				argv[optind+1]);
+}
+
+int do_logical_to_ino(int nargs, char **argv)
+{
+	int ret;
+	int fd;
+	int i;
+	int verbose = 0;
+	int getpath = 1;
+	int bytes_left;
+	struct btrfs_ioctl_logical_ino_args loi;
+	struct btrfs_data_container *inodes;
+	char full_path[4096];
+	char *path_ptr;
+
+	optind = 1;
+	while (1) {
+		int c = getopt(nargs, argv, "Pv");
+		if (c < 0)
+			break;
+		switch (c) {
+		case 'P':
+			getpath = 0;
+			break;
+		case 'v':
+			verbose = 1;
+			break;
+		default:
+			fprintf(stderr, "invalid arguments for ipath\n");
+			return 1;
+		}
+	}
+	if (nargs - optind != 2) {
+		fprintf(stderr, "invalid arguments for ipath\n");
+		return 1;
+	}
+
+	inodes = malloc(4096);
+	if (!inodes)
+		return 1;
+
+	loi.logical = atoll(argv[optind]);
+	loi.size = 4096;
+	loi.inodes = (u64)inodes;
+
+	fd = open_file_or_dir(argv[optind+1]);
+	if (fd < 0) {
+		fprintf(stderr, "ERROR: can't access '%s'\n", argv[optind+1]);
+		ret = 12;
+		goto out;
+	}
+
+	ret = ioctl(fd, BTRFS_IOC_LOGICAL_INO, &loi);
+	if (ret) {
+		printf("ioctl ret=%d, error: %s\n", ret, strerror(errno));
+		goto out;
+	}
+
+	if (verbose)
+		printf("ioctl ret=%d, bytes_left=%lu, bytes_missing=%lu, "
+			"cnt=%d, missed=%d\n", ret,
+			(unsigned long)inodes->bytes_left,
+			(unsigned long)inodes->bytes_missing,
+			inodes->elem_cnt, inodes->elem_missed);
+
+	bytes_left = sizeof(full_path);
+	ret = snprintf(full_path, bytes_left, "%s/", argv[optind+1]);
+	path_ptr = full_path + ret;
+	bytes_left -= ret + 1;
+	BUG_ON(bytes_left < 0);
+
+	for (i = 0; i < inodes->elem_cnt; i += 3) {
+		u64 inum = inodes->val[i];
+		u64 offset = inodes->val[i+1];
+		u64 root = inodes->val[i+2];
+		int path_fd;
+		char *name;
+
+		if (getpath) {
+			name = path_for_root(fd, root);
+			if (IS_ERR(name))
+				return PTR_ERR(name);
+			if (!name) {
+				path_ptr[-1] = '\0';
+				path_fd = fd;
+			} else {
+				path_ptr[-1] = '/';
+				ret = snprintf(path_ptr, bytes_left, "%s",
+						name);
+				BUG_ON(ret >= bytes_left);
+				free(name);
+				path_fd = open_file_or_dir(full_path);
+				if (path_fd < 0) {
+					fprintf(stderr, "ERROR: can't access "
+						"'%s'\n", full_path);
+					goto out;
+				}
+			}
+			__ino_to_path_fd(inum, path_fd, verbose, full_path);
+		} else {
+			printf("inode %llu offset %llu root %llu\n", inum,
+				offset, root);
+		}
+	}
+
+out:
+	free(inodes);
+	return ret;
+}
+
diff --git a/scrub.c b/cmds-scrub.c
index 9dca5f6..9dca5f6 100644
--- a/scrub.c
+++ b/cmds-scrub.c
diff --git a/cmds-subvolume.c b/cmds-subvolume.c
new file mode 100644
index 0000000..931506c
--- /dev/null
+++ b/cmds-subvolume.c
@@ -0,0 +1,444 @@
+/*
+ * 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.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/ioctl.h>
+#include <errno.h>
+#include <sys/stat.h>
+#include <libgen.h>
+#include <limits.h>
+
+#include "kerncompat.h"
+#include "ioctl.h"
+
+#include "btrfs_cmds.h"
+
+/* btrfs-list.c */
+int list_subvols(int fd, int print_parent, int get_default);
+int find_updated_files(int fd, u64 root_id, u64 oldest_gen);
+
+/*
+ * test if path is a directory
+ * this function return
+ * 0-> path exists but it is not a directory
+ * 1-> path exists and it is  a directory
+ * -1 -> path is unaccessible
+ */
+static int test_isdir(char *path)
+{
+	struct stat	st;
+	int		res;
+
+	res = stat(path, &st);
+	if(res < 0 )
+		return -1;
+
+	return S_ISDIR(st.st_mode);
+}
+
+int do_create_subvol(int argc, char **argv)
+{
+	int	res, fddst, len, e;
+	char	*newname;
+	char	*dstdir;
+	struct btrfs_ioctl_vol_args	args;
+	char	*dst = argv[1];
+
+	res = test_isdir(dst);
+	if(res >= 0 ){
+		fprintf(stderr, "ERROR: '%s' exists\n", dst);
+		return 12;
+	}
+
+	newname = strdup(dst);
+	newname = basename(newname);
+	dstdir = strdup(dst);
+	dstdir = dirname(dstdir);
+
+	if( !strcmp(newname,".") || !strcmp(newname,"..") ||
+	     strchr(newname, '/') ){
+		fprintf(stderr, "ERROR: uncorrect subvolume name ('%s')\n",
+			newname);
+		return 14;
+	}
+
+	len = strlen(newname);
+	if (len == 0 || len >= BTRFS_VOL_NAME_MAX) {
+		fprintf(stderr, "ERROR: subvolume name too long ('%s)\n",
+			newname);
+		return 14;
+	}
+
+	fddst = open_file_or_dir(dstdir);
+	if (fddst < 0) {
+		fprintf(stderr, "ERROR: can't access to '%s'\n", dstdir);
+		return 12;
+	}
+
+	printf("Create subvolume '%s/%s'\n", dstdir, newname);
+	strncpy(args.name, newname, BTRFS_PATH_NAME_MAX);
+	res = ioctl(fddst, BTRFS_IOC_SUBVOL_CREATE, &args);
+	e = errno;
+
+	close(fddst);
+
+	if(res < 0 ){
+		fprintf( stderr, "ERROR: cannot create subvolume - %s\n",
+			strerror(e));
+		return 11;
+	}
+
+	return 0;
+
+}
+
+/*
+ * test if path is a subvolume:
+ * this function return
+ * 0-> path exists but it is not a subvolume
+ * 1-> path exists and it is  a subvolume
+ * -1 -> path is unaccessible
+ */
+static int test_issubvolume(char *path)
+{
+	struct stat	st;
+	int		res;
+
+	res = stat(path, &st);
+	if(res < 0 )
+		return -1;
+
+	return (st.st_ino == 256) && S_ISDIR(st.st_mode);
+}
+
+int do_delete_subvolume(int argc, char **argv)
+{
+	int	res, fd, len, e;
+	struct btrfs_ioctl_vol_args	args;
+	char	*dname, *vname, *cpath;
+	char	*path = argv[1];
+
+	res = test_issubvolume(path);
+	if(res<0){
+		fprintf(stderr, "ERROR: error accessing '%s'\n", path);
+		return 12;
+	}
+	if(!res){
+		fprintf(stderr, "ERROR: '%s' is not a subvolume\n", path);
+		return 13;
+	}
+
+	cpath = realpath(path, 0);
+	dname = strdup(cpath);
+	dname = dirname(dname);
+	vname = strdup(cpath);
+	vname = basename(vname);
+	free(cpath);
+
+	if( !strcmp(vname,".") || !strcmp(vname,"..") ||
+	     strchr(vname, '/') ){
+		fprintf(stderr, "ERROR: incorrect subvolume name ('%s')\n",
+			vname);
+		return 14;
+	}
+
+	len = strlen(vname);
+	if (len == 0 || len >= BTRFS_VOL_NAME_MAX) {
+		fprintf(stderr, "ERROR: snapshot name too long ('%s)\n",
+			vname);
+		return 14;
+	}
+
+	fd = open_file_or_dir(dname);
+	if (fd < 0) {
+		close(fd);
+		fprintf(stderr, "ERROR: can't access to '%s'\n", dname);
+		return 12;
+	}
+
+	printf("Delete subvolume '%s/%s'\n", dname, vname);
+	strncpy(args.name, vname, BTRFS_PATH_NAME_MAX);
+	res = ioctl(fd, BTRFS_IOC_SNAP_DESTROY, &args);
+	e = errno;
+
+	close(fd);
+
+	if(res < 0 ){
+		fprintf( stderr, "ERROR: cannot delete '%s/%s' - %s\n",
+			dname, vname, strerror(e));
+		return 11;
+	}
+
+	return 0;
+
+}
+
+int do_subvol_list(int argc, char **argv)
+{
+	int fd;
+	int ret;
+	int print_parent = 0;
+	char *subvol;
+        int optind = 1;
+
+	while(1) {
+		int c = getopt(argc, argv, "p");
+		if (c < 0) break;
+		switch(c) {
+		case 'p':
+			print_parent = 1;
+			optind++;
+			break;
+		}
+	}
+	
+	if (argc - optind != 1) {
+		fprintf(stderr, "ERROR: invalid arguments for subvolume list\n");
+		return 1;
+	}
+
+	subvol = argv[optind];
+
+	ret = test_issubvolume(subvol);
+	if (ret < 0) {
+		fprintf(stderr, "ERROR: error accessing '%s'\n", subvol);
+		return 12;
+	}
+	if (!ret) {
+		fprintf(stderr, "ERROR: '%s' is not a subvolume\n", subvol);
+		return 13;
+	}
+
+	fd = open_file_or_dir(subvol);
+	if (fd < 0) {
+		fprintf(stderr, "ERROR: can't access '%s'\n", subvol);
+		return 12;
+	}
+	ret = list_subvols(fd, print_parent, 0);
+	if (ret)
+		return 19;
+	return 0;
+}
+
+int do_clone(int argc, char **argv)
+{
+	char	*subvol, *dst;
+	int	res, fd, fddst, len, e, optind = 0, readonly = 0;
+	char	*newname;
+	char	*dstdir;
+	struct btrfs_ioctl_vol_args_v2	args;
+
+	memset(&args, 0, sizeof(args));
+
+	while (1) {
+		int c = getopt(argc, argv, "r");
+
+		if (c < 0)
+			break;
+		switch (c) {
+		case 'r':
+			optind++;
+			readonly = 1;
+			break;
+		default:
+			fprintf(stderr,
+				"Invalid arguments for subvolume snapshot\n");
+			free(argv);
+			return 1;
+		}
+	}
+	if (argc - optind != 3) {
+		fprintf(stderr, "Invalid arguments for subvolume snapshot\n");
+		free(argv);
+		return 1;
+	}
+
+	subvol = argv[optind+1];
+	dst = argv[optind+2];
+
+	res = test_issubvolume(subvol);
+	if(res<0){
+		fprintf(stderr, "ERROR: error accessing '%s'\n", subvol);
+		return 12;
+	}
+	if(!res){
+		fprintf(stderr, "ERROR: '%s' is not a subvolume\n", subvol);
+		return 13;
+	}
+
+	res = test_isdir(dst);
+	if(res == 0 ){
+		fprintf(stderr, "ERROR: '%s' exists and it is not a directory\n", dst);
+		return 12;
+	}
+
+	if(res>0){
+		newname = strdup(subvol);
+		newname = basename(newname);
+		dstdir = dst;
+	}else{
+		newname = strdup(dst);
+		newname = basename(newname);
+		dstdir = strdup(dst);
+		dstdir = dirname(dstdir);
+	}
+
+	if( !strcmp(newname,".") || !strcmp(newname,"..") ||
+	     strchr(newname, '/') ){
+		fprintf(stderr, "ERROR: incorrect snapshot name ('%s')\n",
+			newname);
+		return 14;
+	}
+
+	len = strlen(newname);
+	if (len == 0 || len >= BTRFS_VOL_NAME_MAX) {
+		fprintf(stderr, "ERROR: snapshot name too long ('%s)\n",
+			newname);
+		return 14;
+	}
+
+	fddst = open_file_or_dir(dstdir);
+	if (fddst < 0) {
+		fprintf(stderr, "ERROR: can't access to '%s'\n", dstdir);
+		return 12;
+	}
+
+	fd = open_file_or_dir(subvol);
+	if (fd < 0) {
+		close(fddst);
+		fprintf(stderr, "ERROR: can't access to '%s'\n", dstdir);
+		return 12;
+	}
+
+	if (readonly) {
+		args.flags |= BTRFS_SUBVOL_RDONLY;
+		printf("Create a readonly snapshot of '%s' in '%s/%s'\n",
+		       subvol, dstdir, newname);
+	} else {
+		printf("Create a snapshot of '%s' in '%s/%s'\n",
+		       subvol, dstdir, newname);
+	}
+
+	args.fd = fd;
+	strncpy(args.name, newname, BTRFS_SUBVOL_NAME_MAX);
+	res = ioctl(fddst, BTRFS_IOC_SNAP_CREATE_V2, &args);
+	e = errno;
+
+	close(fd);
+	close(fddst);
+
+	if(res < 0 ){
+		fprintf( stderr, "ERROR: cannot snapshot '%s' - %s\n",
+			subvol, strerror(e));
+		return 11;
+	}
+
+	return 0;
+
+}
+
+int do_get_default_subvol(int nargs, char **argv)
+{
+	int fd;
+	int ret;
+	char *subvol;
+
+	subvol = argv[1];
+
+	ret = test_issubvolume(subvol);
+	if (ret < 0) {
+		fprintf(stderr, "ERROR: error accessing '%s'\n", subvol);
+		return 12;
+	}
+	if (!ret) {
+		fprintf(stderr, "ERROR: '%s' is not a subvolume\n", subvol);
+		return 13;
+	}
+
+	fd = open_file_or_dir(subvol);
+	if (fd < 0) {
+		fprintf(stderr, "ERROR: can't access '%s'\n", subvol);
+		return 12;
+	}
+	ret = list_subvols(fd, 0, 1);
+	if (ret)
+		return 19;
+	return 0;
+}
+
+int do_set_default_subvol(int nargs, char **argv)
+{
+	int	ret=0, fd, e;
+	u64	objectid;
+	char	*path = argv[2];
+	char	*subvolid = argv[1];
+
+	fd = open_file_or_dir(path);
+	if (fd < 0) {
+		fprintf(stderr, "ERROR: can't access to '%s'\n", path);
+		return 12;
+	}
+
+	objectid = (unsigned long long)strtoll(subvolid, NULL, 0);
+	if (errno == ERANGE) {
+		fprintf(stderr, "ERROR: invalid tree id (%s)\n",subvolid);
+		return 30;
+	}
+	ret = ioctl(fd, BTRFS_IOC_DEFAULT_SUBVOL, &objectid);
+	e = errno;
+	close(fd);
+	if( ret < 0 ){
+		fprintf(stderr, "ERROR: unable to set a new default subvolume - %s\n",
+			strerror(e));
+		return 30;
+	}
+	return 0;
+}
+
+int do_find_newer(int argc, char **argv)
+{
+	int fd;
+	int ret;
+	char *subvol;
+	u64 last_gen;
+
+	subvol = argv[1];
+	last_gen = atoll(argv[2]);
+
+	ret = test_issubvolume(subvol);
+	if (ret < 0) {
+		fprintf(stderr, "ERROR: error accessing '%s'\n", subvol);
+		return 12;
+	}
+	if (!ret) {
+		fprintf(stderr, "ERROR: '%s' is not a subvolume\n", subvol);
+		return 13;
+	}
+
+	fd = open_file_or_dir(subvol);
+	if (fd < 0) {
+		fprintf(stderr, "ERROR: can't access '%s'\n", subvol);
+		return 12;
+	}
+	ret = find_updated_files(fd, 0, last_gen);
+	if (ret)
+		return 19;
+	return 0;
+}
+
diff --git a/common.c b/common.c
new file mode 100644
index 0000000..03f6570
--- /dev/null
+++ b/common.c
@@ -0,0 +1,46 @@
+/*
+ * 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.
+ */
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <dirent.h>
+#include <fcntl.h>
+
+int open_file_or_dir(const char *fname)
+{
+	int ret;
+	struct stat st;
+	DIR *dirstream;
+	int fd;
+
+	ret = stat(fname, &st);
+	if (ret < 0) {
+		return -1;
+	}
+	if (S_ISDIR(st.st_mode)) {
+		dirstream = opendir(fname);
+		if (!dirstream) {
+			return -2;
+		}
+		fd = dirfd(dirstream);
+	} else {
+		fd = open(fname, O_RDWR);
+	}
+	if (fd < 0) {
+		return -3;
+	}
+	return fd;
+}