111 lines
2.5 KiB
C
111 lines
2.5 KiB
C
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/*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License v2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this program; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 021110-1307, USA.
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*/
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#include <sys/stat.h>
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#include <sys/ioctl.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include "ctree.h"
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#include "commands.h"
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#include "utils.h"
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#include "props.h"
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static int prop_read_only(enum prop_object_type type,
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const char *object,
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const char *name,
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const char *value)
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{
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int ret = 0;
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int fd = -1;
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u64 flags = 0;
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fd = open(object, O_RDONLY);
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if (fd < 0) {
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ret = -errno;
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fprintf(stderr, "ERROR: open %s failed. %s\n",
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object, strerror(-ret));
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goto out;
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}
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ret = ioctl(fd, BTRFS_IOC_SUBVOL_GETFLAGS, &flags);
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if (ret < 0) {
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ret = -errno;
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fprintf(stderr, "ERROR: failed to get flags for %s. %s\n",
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object, strerror(-ret));
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goto out;
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}
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if (!value) {
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if (flags & BTRFS_SUBVOL_RDONLY)
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fprintf(stdout, "ro=true\n");
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else
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fprintf(stdout, "ro=false\n");
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ret = 0;
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goto out;
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}
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if (!strcmp(value, "true")) {
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flags |= BTRFS_SUBVOL_RDONLY;
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} else if (!strcmp(value, "false")) {
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flags = flags & ~BTRFS_SUBVOL_RDONLY;
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} else {
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ret = -EINVAL;
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fprintf(stderr, "ERROR: invalid value for property.\n");
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goto out;
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}
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ret = ioctl(fd, BTRFS_IOC_SUBVOL_SETFLAGS, &flags);
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if (ret < 0) {
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ret = -errno;
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fprintf(stderr, "ERROR: failed to set flags for %s. %s\n",
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object, strerror(-ret));
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goto out;
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}
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out:
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if (fd != -1)
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close(fd);
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return ret;
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}
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static int prop_label(enum prop_object_type type,
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const char *object,
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const char *name,
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const char *value)
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{
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int ret;
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if (value) {
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ret = set_label((char *) object, (char *) value);
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} else {
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char label[BTRFS_LABEL_SIZE];
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ret = get_label((char *) object, label);
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if (!ret)
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fprintf(stdout, "label=%s\n", label);
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}
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return ret;
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}
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const struct prop_handler prop_handlers[] = {
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{"ro", "Set/get read-only flag of subvolume.", 0, prop_object_subvol,
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prop_read_only},
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{"label", "Set/get label of device.", 0, prop_object_dev, prop_label},
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{0, 0, 0, 0, 0}
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};
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