diff options
Diffstat (limited to 'cmds-subvolume.c')
| -rw-r--r-- | cmds-subvolume.c | 161 |
1 files changed, 124 insertions, 37 deletions
diff --git a/cmds-subvolume.c b/cmds-subvolume.c index 931506c8..68ebd402 100644 --- a/cmds-subvolume.c +++ b/cmds-subvolume.c @@ -27,12 +27,15 @@ #include "kerncompat.h" #include "ioctl.h" -#include "btrfs_cmds.h" +#include "commands.h" /* btrfs-list.c */ int list_subvols(int fd, int print_parent, int get_default); int find_updated_files(int fd, u64 root_id, u64 oldest_gen); +static const char subvolume_cmd_group_usage[] = + "btrfs subvolume <command> <args>"; + /* * test if path is a directory * this function return @@ -52,13 +55,26 @@ static int test_isdir(char *path) return S_ISDIR(st.st_mode); } -int do_create_subvol(int argc, char **argv) +static const char * const cmd_subvol_create_usage[] = { + "btrfs subvolume create [<dest>/]<name>", + "Create a subvolume", + "Create a subvolume <name> in <dest>. If <dest> is not given", + "subvolume <name> will be created in the current directory.", + NULL +}; + +static int cmd_subvol_create(int argc, char **argv) { int res, fddst, len, e; char *newname; char *dstdir; struct btrfs_ioctl_vol_args args; - char *dst = argv[1]; + char *dst; + + if (check_argc_exact(argc, 2)) + usage(cmd_subvol_create_usage); + + dst = argv[1]; res = test_isdir(dst); if(res >= 0 ){ @@ -105,7 +121,6 @@ int do_create_subvol(int argc, char **argv) } return 0; - } /* @@ -127,12 +142,23 @@ static int test_issubvolume(char *path) return (st.st_ino == 256) && S_ISDIR(st.st_mode); } -int do_delete_subvolume(int argc, char **argv) +static const char * const cmd_subvol_delete_usage[] = { + "btrfs subvolume delete <name>", + "Delete a subvolume", + NULL +}; + +static int cmd_subvol_delete(int argc, char **argv) { int res, fd, len, e; struct btrfs_ioctl_vol_args args; char *dname, *vname, *cpath; - char *path = argv[1]; + char *path; + + if (check_argc_exact(argc, 2)) + usage(cmd_subvol_delete_usage); + + path = argv[1]; res = test_issubvolume(path); if(res<0){ @@ -186,32 +212,40 @@ int do_delete_subvolume(int argc, char **argv) } return 0; - } -int do_subvol_list(int argc, char **argv) +static const char * const cmd_subvol_list_usage[] = { + "btrfs subvolume list [-p] <path>", + "List subvolumes (and snapshots)", + "", + "-p print parent ID", + NULL +}; + +static int cmd_subvol_list(int argc, char **argv) { int fd; int ret; int print_parent = 0; char *subvol; - int optind = 1; + optind = 1; while(1) { int c = getopt(argc, argv, "p"); - if (c < 0) break; + if (c < 0) + break; + switch(c) { case 'p': print_parent = 1; - optind++; break; + default: + usage(cmd_subvol_list_usage); } } - - if (argc - optind != 1) { - fprintf(stderr, "ERROR: invalid arguments for subvolume list\n"); - return 1; - } + + if (check_argc_exact(argc - optind, 1)) + usage(cmd_subvol_list_usage); subvol = argv[optind]; @@ -236,41 +270,46 @@ int do_subvol_list(int argc, char **argv) return 0; } -int do_clone(int argc, char **argv) +static const char * const cmd_snapshot_usage[] = { + "btrfs subvolume snapshot [-r] <source> [<dest>/]<name>", + "Create a snapshot of the subvolume", + "Create a writable/readonly snapshot of the subvolume <source> with", + "the name <name> in the <dest> directory", + "", + "-r create a readonly snapshot", + NULL +}; + +static int cmd_snapshot(int argc, char **argv) { char *subvol, *dst; - int res, fd, fddst, len, e, optind = 0, readonly = 0; + int res, fd, fddst, len, e, readonly = 0; char *newname; char *dstdir; struct btrfs_ioctl_vol_args_v2 args; memset(&args, 0, sizeof(args)); + optind = 1; 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; + usage(cmd_snapshot_usage); } } - if (argc - optind != 3) { - fprintf(stderr, "Invalid arguments for subvolume snapshot\n"); - free(argv); - return 1; - } - subvol = argv[optind+1]; - dst = argv[optind+2]; + if (check_argc_exact(argc - optind, 2)) + usage(cmd_snapshot_usage); + + subvol = argv[optind]; + dst = argv[optind + 1]; res = test_issubvolume(subvol); if(res<0){ @@ -350,15 +389,23 @@ int do_clone(int argc, char **argv) } return 0; - } -int do_get_default_subvol(int nargs, char **argv) +static const char * const cmd_subvol_get_default_usage[] = { + "btrfs subvolume get-dafault <path>", + "Get the default subvolume of a filesystem", + NULL +}; + +static int cmd_subvol_get_default(int argc, char **argv) { int fd; int ret; char *subvol; + if (check_argc_exact(argc, 2)) + usage(cmd_subvol_get_default_usage); + subvol = argv[1]; ret = test_issubvolume(subvol); @@ -382,12 +429,24 @@ int do_get_default_subvol(int nargs, char **argv) return 0; } -int do_set_default_subvol(int nargs, char **argv) +static const char * const cmd_subvol_set_default_usage[] = { + "btrfs subvolume set-dafault <subvolid> <path>", + "Set the default subvolume of a filesystem", + NULL +}; + +static int cmd_subvol_set_default(int argc, char **argv) { int ret=0, fd, e; u64 objectid; - char *path = argv[2]; - char *subvolid = argv[1]; + char *path; + char *subvolid; + + if (check_argc_exact(argc, 3)) + usage(cmd_subvol_set_default_usage); + + subvolid = argv[1]; + path = argv[2]; fd = open_file_or_dir(path); if (fd < 0) { @@ -411,13 +470,22 @@ int do_set_default_subvol(int nargs, char **argv) return 0; } -int do_find_newer(int argc, char **argv) +static const char * const cmd_find_new_usage[] = { + "btrfs subvolume find-new <path> <lastgen>", + "List the recently modified files in a filesystem", + NULL +}; + +static int cmd_find_new(int argc, char **argv) { int fd; int ret; char *subvol; u64 last_gen; + if (check_argc_exact(argc, 3)) + usage(cmd_find_new_usage); + subvol = argv[1]; last_gen = atoll(argv[2]); @@ -442,3 +510,22 @@ int do_find_newer(int argc, char **argv) return 0; } +const struct cmd_group subvolume_cmd_group = { + subvolume_cmd_group_usage, NULL, { + { "create", cmd_subvol_create, cmd_subvol_create_usage, NULL, 0 }, + { "delete", cmd_subvol_delete, cmd_subvol_delete_usage, NULL, 0 }, + { "list", cmd_subvol_list, cmd_subvol_list_usage, NULL, 0 }, + { "snapshot", cmd_snapshot, cmd_snapshot_usage, NULL, 0 }, + { "get-default", cmd_subvol_get_default, + cmd_subvol_get_default_usage, NULL, 0 }, + { "set-default", cmd_subvol_set_default, + cmd_subvol_set_default_usage, NULL, 0 }, + { "find-new", cmd_find_new, cmd_find_new_usage, NULL, 0 }, + { 0, 0, 0, 0, 0 } + } +}; + +int cmd_subvolume(int argc, char **argv) +{ + return handle_command_group(&subvolume_cmd_group, argc, argv); +} |