blob: f2b6355122c68806f12e690fdf0bfcc69cd90630 [file] [log] [blame]
/*
* 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;
}