move Rust sources to top level, C sources into c_src

[bcachefs-tools-debian] / c_src / cmd_subvolume.c

diff --git a/c_src/cmd_subvolume.c b/c_src/cmd_subvolume.c
new file mode 100644 (file)
index 0000000..99a302b
--- /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;
+}