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Diffstat (limited to 'c_src/cmd_subvolume.c')
| -rw-r--r-- | c_src/cmd_subvolume.c | 188 |
1 files changed, 188 insertions, 0 deletions
diff --git a/c_src/cmd_subvolume.c b/c_src/cmd_subvolume.c new file mode 100644 index 00000000..99a302b8 --- /dev/null +++ b/c_src/cmd_subvolume.c @@ -0,0 +1,188 @@ +#include <errno.h> +#include <fcntl.h> +#include <getopt.h> +#include <libgen.h> +#include <stdbool.h> +#include <stdint.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <sys/ioctl.h> +#include <sys/stat.h> +#include <sys/types.h> +#include <unistd.h> + +#include "libbcachefs/bcachefs.h" +#include "libbcachefs/bcachefs_ioctl.h" +#include "cmds.h" +#include "libbcachefs.h" +#include "libbcachefs/opts.h" +#include "tools-util.h" + +int subvolume_usage(void) +{ + puts("bcachefs subvolume - manage subvolumes and snapshots\n" + "Usage: bcachefs subvolume <CMD> [OPTION]\n" + "\n" + "Commands:\n" + " create create a subvolume\n" + " delete delete a subvolume\n" + " snapshot create a snapshot\n" + "\n" + "Report bugs to <linux-bcachefs@vger.kernel.org>"); + return 0; +} + +static void subvolume_create_usage(void) +{ + puts("bcachefs subvolume create - create a new subvolume\n" + "Usage: bcachefs subvolume create [OPTION]... path\n" + "\n" + "Options:\n" + " -h, --help Display this help and exit\n" + "\n" + "Report bugs to <linux-bcachefs@vger.kernel.org>"); +} + +int cmd_subvolume_create(int argc, char *argv[]) +{ + static const struct option longopts[] = { + { "help", no_argument, NULL, 'h' }, + { NULL } + }; + char *path; + int opt; + + while ((opt = getopt_long(argc, argv, "h", longopts, NULL)) != -1) + switch (opt) { + case 'h': + subvolume_create_usage(); + exit(EXIT_SUCCESS); + } + args_shift(optind); + + while ((path = arg_pop())) { + char *dir = dirname(strdup(path)); + + struct bchfs_handle fs = bcache_fs_open(dir); + + struct bch_ioctl_subvolume i = { + .dirfd = AT_FDCWD, + .mode = 0777, + .dst_ptr = (unsigned long)path, + }; + + xioctl(fs.ioctl_fd, BCH_IOCTL_SUBVOLUME_CREATE, &i); + bcache_fs_close(fs); + } + + return 0; +} + +static void subvolume_delete_usage(void) +{ + puts("bcachefs subvolume delete - delete an existing subvolume\n" + "Usage: bcachefs subvolume delete [OPTION]... path\n" + "\n" + "Options:\n" + " -h, --help Display this help and exit\n" + "\n" + "Report bugs to <linux-bcachefs@vger.kernel.org>"); +} + +int cmd_subvolume_delete(int argc, char *argv[]) +{ + static const struct option longopts[] = { + { "help", no_argument, NULL, 'h' }, + { NULL } + }; + char *path; + int opt; + + while ((opt = getopt_long(argc, argv, "h", longopts, NULL)) != -1) + switch (opt) { + case 'h': + subvolume_delete_usage(); + exit(EXIT_SUCCESS); + } + args_shift(optind); + + while ((path = arg_pop())) { + char *dir = dirname(strdup(path)); + + struct bchfs_handle fs = bcache_fs_open(dir); + + struct bch_ioctl_subvolume i = { + .dirfd = AT_FDCWD, + .mode = 0777, + .dst_ptr = (unsigned long)path, + }; + + xioctl(fs.ioctl_fd, BCH_IOCTL_SUBVOLUME_DESTROY, &i); + bcache_fs_close(fs); + } + + return 0; +} + +static void snapshot_create_usage(void) +{ + puts("bcachefs subvolume snapshot - create a snapshot \n" + "Usage: bcachefs subvolume snapshot [OPTION]... <source> <dest>\n" + "\n" + "Create a snapshot of <source> at <dest>. If specified, <source> must be a subvolume;\n" + "if not specified the snapshot will be of the subvolme containing <dest>.\n" + "Options:\n" + " -r Make snapshot read only\n" + " -h, --help Display this help and exit\n" + "\n" + "Report bugs to <linux-bcachefs@vger.kernel.org>"); +} + +int cmd_subvolume_snapshot(int argc, char *argv[]) +{ + static const struct option longopts[] = { + { "help", no_argument, NULL, 'h' }, + { NULL } + }; + unsigned flags = BCH_SUBVOL_SNAPSHOT_CREATE; + int opt; + + while ((opt = getopt_long(argc, argv, "rh", longopts, NULL)) != -1) + switch (opt) { + case 'r': + flags |= BCH_SUBVOL_SNAPSHOT_RO; + break; + case 'h': + snapshot_create_usage(); + exit(EXIT_SUCCESS); + } + args_shift(optind); + + char *src = arg_pop(); + char *dst = arg_pop(); + + if (argc) + die("Too many arguments"); + + if (!dst) + swap(src, dst); + if (!dst) + die("Please specify a path to create"); + + char *dir = dirname(strdup(dst)); + + struct bchfs_handle fs = bcache_fs_open(dir); + + struct bch_ioctl_subvolume i = { + .flags = flags, + .dirfd = AT_FDCWD, + .mode = 0777, + .src_ptr = (unsigned long)src, + .dst_ptr = (unsigned long)dst, + }; + + xioctl(fs.ioctl_fd, BCH_IOCTL_SUBVOLUME_CREATE, &i); + bcache_fs_close(fs); + return 0; +} |