static int _cmd_qgroup_create(int create, int argc, char **argv)
{
int ret = 0;
int fd;
int e;
char *path;
struct btrfs_ioctl_qgroup_create_args args;
DIR *dirstream = NULL;
if (check_argc_exact(argc - optind, 2))
return -1;
memset(&args, 0, sizeof(args));
args.create = create;
args.qgroupid = parse_qgroupid(argv[optind]);
path = argv[optind + 1];
fd = btrfs_open_dir(path, &dirstream, 1);
if (fd < 0)
return 1;
ret = ioctl(fd, BTRFS_IOC_QGROUP_CREATE, &args);
e = errno;
close_file_or_dir(fd, dirstream);
if (ret < 0) {
error("unable to %s quota group: %s",
create ? "create":"destroy", strerror(e));
return 1;
}
return 0;
}
static int qgroup_create(int create, int argc, char **argv)
{
int ret = 0;
int fd;
int e;
char *path = argv[2];
struct btrfs_ioctl_qgroup_create_args args;
DIR *dirstream = NULL;
if (check_argc_exact(argc, 3))
return -1;
memset(&args, 0, sizeof(args));
args.create = create;
args.qgroupid = parse_qgroupid(argv[1]);
fd = open_file_or_dir(path, &dirstream);
if (fd < 0) {
fprintf(stderr, "ERROR: can't access '%s'\n", path);
return 1;
}
ret = ioctl(fd, BTRFS_IOC_QGROUP_CREATE, &args);
e = errno;
close_file_or_dir(fd, dirstream);
if (ret < 0) {
fprintf(stderr, "ERROR: unable to %s quota group: %s\n",
create ? "create":"destroy", strerror(e));
return 1;
}
return 0;
}
int qgroup_inherit_add_copy(struct btrfs_qgroup_inherit **inherit, char *arg,
int type)
{
int ret;
u64 qgroup_src;
u64 qgroup_dst;
char *p;
int pos = 0;
p = strchr(arg, ':');
if (!p) {
bad:
fprintf(stderr, "ERROR: bad copy specification\n");
return 12;
}
*p = 0;
qgroup_src = parse_qgroupid(arg);
qgroup_dst = parse_qgroupid(p + 1);
*p = ':';
if (!qgroup_src || !qgroup_dst)
goto bad;
if (*inherit)
pos = (*inherit)->num_qgroups +
(*inherit)->num_ref_copies * 2 * type;
ret = qgroup_inherit_realloc(inherit, 2, pos);
if (ret)
return ret;
(*inherit)->qgroups[pos++] = qgroup_src;
(*inherit)->qgroups[pos++] = qgroup_dst;
if (!type)
++(*inherit)->num_ref_copies;
else
++(*inherit)->num_excl_copies;
return 0;
}
static int qgroup_assign(int assign, int argc, char **argv)
{
int ret = 0;
int fd;
int e;
char *path = argv[3];
struct btrfs_ioctl_qgroup_assign_args args;
DIR *dirstream = NULL;
if (check_argc_exact(argc, 4))
return -1;
memset(&args, 0, sizeof(args));
args.assign = assign;
args.src = parse_qgroupid(argv[1]);
args.dst = parse_qgroupid(argv[2]);
/*
* FIXME src should accept subvol path
*/
if (btrfs_qgroup_level(args.src) >= btrfs_qgroup_level(args.dst)) {
fprintf(stderr, "ERROR: bad relation requested '%s'\n", path);
return 1;
}
fd = open_file_or_dir(path, &dirstream);
if (fd < 0) {
fprintf(stderr, "ERROR: can't access '%s'\n", path);
return 1;
}
ret = ioctl(fd, BTRFS_IOC_QGROUP_ASSIGN, &args);
e = errno;
close_file_or_dir(fd, dirstream);
if (ret < 0) {
fprintf(stderr, "ERROR: unable to assign quota group: %s\n",
strerror(e));
return 1;
}
return 0;
}
int qgroup_inherit_add_group(struct btrfs_qgroup_inherit **inherit, char *arg)
{
int ret;
u64 qgroupid = parse_qgroupid(arg);
int pos = 0;
if (qgroupid == 0) {
fprintf(stderr, "ERROR: bad qgroup specification\n");
return 12;
}
if (*inherit)
pos = (*inherit)->num_qgroups;
ret = qgroup_inherit_realloc(inherit, 1, pos);
if (ret)
return ret;
(*inherit)->qgroups[(*inherit)->num_qgroups++] = qgroupid;
return 0;
}
static int cmd_qgroup_limit(int argc, char **argv)
{
int ret = 0;
int fd;
int e;
char *path = NULL;
struct btrfs_ioctl_qgroup_limit_args args;
unsigned long long size;
int compressed = 0;
int exclusive = 0;
DIR *dirstream = NULL;
optind = 1;
while (1) {
int c = getopt(argc, argv, "ce");
if (c < 0)
break;
switch (c) {
case 'c':
compressed = 1;
break;
case 'e':
exclusive = 1;
break;
default:
usage(cmd_qgroup_limit_usage);
}
}
if (check_argc_min(argc - optind, 2))
usage(cmd_qgroup_limit_usage);
if (!parse_limit(argv[optind], &size)) {
error("invalid size argument: %s", argv[optind]);
return 1;
}
memset(&args, 0, sizeof(args));
if (compressed)
args.lim.flags |= BTRFS_QGROUP_LIMIT_RFER_CMPR |
BTRFS_QGROUP_LIMIT_EXCL_CMPR;
if (exclusive) {
args.lim.flags |= BTRFS_QGROUP_LIMIT_MAX_EXCL;
args.lim.max_exclusive = size;
} else {
args.lim.flags |= BTRFS_QGROUP_LIMIT_MAX_RFER;
args.lim.max_referenced = size;
}
if (argc - optind == 2) {
args.qgroupid = 0;
path = argv[optind + 1];
ret = test_issubvolume(path);
if (ret < 0) {
error("cannot access '%s': %s", path, strerror(-ret));
return 1;
}
if (!ret) {
error("'%s' is not a subvolume", path);
return 1;
}
/*
* keep qgroupid at 0, this indicates that the subvolume the
* fd refers to is to be limited
*/
} else if (argc - optind == 3) {
args.qgroupid = parse_qgroupid(argv[optind + 1]);
path = argv[optind + 2];
} else
usage(cmd_qgroup_limit_usage);
fd = btrfs_open_dir(path, &dirstream, 1);
if (fd < 0)
return 1;
ret = ioctl(fd, BTRFS_IOC_QGROUP_LIMIT, &args);
e = errno;
close_file_or_dir(fd, dirstream);
if (ret < 0) {
error("unable to limit requested quota group: %s", strerror(e));
return 1;
}
return 0;
}
static int _cmd_qgroup_assign(int assign, int argc, char **argv,
const char * const *usage_str)
{
int ret = 0;
int fd;
int rescan = 0;
char *path;
struct btrfs_ioctl_qgroup_assign_args args;
DIR *dirstream = NULL;
if (assign) {
while (1) {
enum { GETOPT_VAL_RESCAN = 256, GETOPT_VAL_NO_RESCAN };
static const struct option long_options[] = {
{ "rescan", no_argument, NULL,
GETOPT_VAL_RESCAN },
{ "no-rescan", no_argument, NULL,
GETOPT_VAL_NO_RESCAN },
{ NULL, 0, NULL, 0 }
};
int c = getopt_long(argc, argv, "", long_options, NULL);
if (c < 0)
break;
switch (c) {
case GETOPT_VAL_RESCAN:
rescan = 1;
break;
case GETOPT_VAL_NO_RESCAN:
rescan = 0;
break;
default:
/* Usage printed by the caller */
return -1;
}
}
} else {
clean_args_no_options(argc, argv, usage_str);
}
if (check_argc_exact(argc - optind, 3))
usage(usage_str);
memset(&args, 0, sizeof(args));
args.assign = assign;
args.src = parse_qgroupid(argv[optind]);
args.dst = parse_qgroupid(argv[optind + 1]);
path = argv[optind + 2];
/*
* FIXME src should accept subvol path
*/
if (btrfs_qgroup_level(args.src) >= btrfs_qgroup_level(args.dst)) {
error("bad relation requested: %s", path);
return 1;
}
fd = btrfs_open_dir(path, &dirstream, 1);
if (fd < 0)
return 1;
ret = ioctl(fd, BTRFS_IOC_QGROUP_ASSIGN, &args);
if (ret < 0) {
error("unable to assign quota group: %s", strerror(errno));
close_file_or_dir(fd, dirstream);
return 1;
}
/*
* If ret > 0, it means assign caused qgroup data inconsistent state.
* Schedule a quota rescan if requested.
*
* The return value change only happens in newer kernel. But will not
* cause problem since old kernel has a bug that will never clear
* INCONSISTENT bit.
*/
if (ret > 0) {
if (rescan) {
struct btrfs_ioctl_quota_rescan_args qargs;
printf("Quota data changed, rescan scheduled\n");
memset(&qargs, 0, sizeof(qargs));
ret = ioctl(fd, BTRFS_IOC_QUOTA_RESCAN, &qargs);
if (ret < 0)
error("quota rescan failed: %s",
strerror(errno));
} else {
warning("quotas may be inconsistent, rescan needed");
}
}
close_file_or_dir(fd, dirstream);
return ret;
}