#include <sys/stat.h>
#include <libgen.h>
#include <limits.h>
+#include <getopt.h>
+#include <uuid/uuid.h>
#include "kerncompat.h"
#include "ioctl.h"
+#include "qgroup.h"
+#include "ctree.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);
+#include "utils.h"
+#include "btrfs-list.h"
+#include "utils.h"
static const char * const subvolume_cmd_group_usage[] = {
"btrfs subvolume <command> <args>",
}
static const char * const cmd_subvol_create_usage[] = {
- "btrfs subvolume create [<dest>/]<name>",
+ "btrfs subvolume create [-i <qgroupid>] [<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.",
+ "",
+ "-i <qgroupid> add the newly created subvolume to a qgroup. This",
+ " option can be given multiple times.",
NULL
};
static int cmd_subvol_create(int argc, char **argv)
{
- int res, fddst, len, e;
+ int retval, res, len;
+ int fddst = -1;
+ char *dupname = NULL;
+ char *dupdir = NULL;
char *newname;
char *dstdir;
- struct btrfs_ioctl_vol_args args;
char *dst;
+ struct btrfs_qgroup_inherit *inherit = NULL;
+ DIR *dirstream = NULL;
- if (check_argc_exact(argc, 2))
+ optind = 1;
+ while (1) {
+ int c = getopt(argc, argv, "c:i:");
+ if (c < 0)
+ break;
+
+ switch (c) {
+ case 'c':
+ res = qgroup_inherit_add_copy(&inherit, optarg, 0);
+ if (res) {
+ retval = res;
+ goto out;
+ }
+ break;
+ case 'i':
+ res = qgroup_inherit_add_group(&inherit, optarg);
+ if (res) {
+ retval = res;
+ goto out;
+ }
+ break;
+ default:
+ usage(cmd_subvol_create_usage);
+ }
+ }
+
+ if (check_argc_exact(argc - optind, 1))
usage(cmd_subvol_create_usage);
- dst = argv[1];
+ dst = argv[optind];
+ retval = 1; /* failure */
res = test_isdir(dst);
- if(res >= 0 ){
+ if (res >= 0) {
fprintf(stderr, "ERROR: '%s' exists\n", dst);
- return 12;
+ goto out;
}
- newname = strdup(dst);
- newname = basename(newname);
- dstdir = strdup(dst);
- dstdir = dirname(dstdir);
+ dupname = strdup(dst);
+ newname = basename(dupname);
+ dupdir = strdup(dst);
+ dstdir = dirname(dupdir);
- if( !strcmp(newname,".") || !strcmp(newname,"..") ||
+ if (!strcmp(newname, ".") || !strcmp(newname, "..") ||
strchr(newname, '/') ){
fprintf(stderr, "ERROR: uncorrect subvolume name ('%s')\n",
newname);
- return 14;
+ goto out;
}
len = strlen(newname);
if (len == 0 || len >= BTRFS_VOL_NAME_MAX) {
fprintf(stderr, "ERROR: subvolume name too long ('%s)\n",
newname);
- return 14;
+ goto out;
}
- fddst = open_file_or_dir(dstdir);
+ fddst = open_file_or_dir(dstdir, &dirstream);
if (fddst < 0) {
- fprintf(stderr, "ERROR: can't access to '%s'\n", dstdir);
- return 12;
+ fprintf(stderr, "ERROR: can't access '%s'\n", dstdir);
+ goto out;
}
printf("Create subvolume '%s/%s'\n", dstdir, newname);
- strncpy(args.name, newname, BTRFS_PATH_NAME_MAX);
- res = ioctl(fddst, BTRFS_IOC_SUBVOL_CREATE, &args);
- e = errno;
+ if (inherit) {
+ struct btrfs_ioctl_vol_args_v2 args;
- close(fddst);
+ memset(&args, 0, sizeof(args));
+ strncpy_null(args.name, newname);
+ args.flags |= BTRFS_SUBVOL_QGROUP_INHERIT;
+ args.size = qgroup_inherit_size(inherit);
+ args.qgroup_inherit = inherit;
- if(res < 0 ){
- fprintf( stderr, "ERROR: cannot create subvolume - %s\n",
- strerror(e));
- return 11;
+ res = ioctl(fddst, BTRFS_IOC_SUBVOL_CREATE_V2, &args);
+ } else {
+ struct btrfs_ioctl_vol_args args;
+
+ memset(&args, 0, sizeof(args));
+ strncpy_null(args.name, newname);
+
+ res = ioctl(fddst, BTRFS_IOC_SUBVOL_CREATE, &args);
}
- return 0;
+ if (res < 0) {
+ fprintf(stderr, "ERROR: cannot create subvolume - %s\n",
+ strerror(errno));
+ goto out;
+ }
+
+ retval = 0; /* success */
+out:
+ close_file_or_dir(fddst, dirstream);
+ free(inherit);
+ free(dupname);
+ free(dupdir);
+
+ return retval;
}
/*
* 1-> path exists and it is a subvolume
* -1 -> path is unaccessible
*/
-static int test_issubvolume(char *path)
+int test_issubvolume(char *path)
{
struct stat st;
int res;
return (st.st_ino == 256) && S_ISDIR(st.st_mode);
}
+static int wait_for_commit(int fd)
+{
+ int ret;
+
+ ret = ioctl(fd, BTRFS_IOC_START_SYNC, NULL);
+ if (ret < 0)
+ return ret;
+ return ioctl(fd, BTRFS_IOC_WAIT_SYNC, NULL);
+}
+
static const char * const cmd_subvol_delete_usage[] = {
- "btrfs subvolume delete <name>",
- "Delete a subvolume",
+ "btrfs subvolume delete [options] <subvolume> [<subvolume>...]",
+ "Delete subvolume(s)",
+ "Delete subvolumes from the filesystem. The corresponding directory",
+ "is removed instantly but the data blocks are removed later.",
+ "The deletion does not involve full commit by default due to",
+ "performance reasons (as a consequence, the subvolume may appear again",
+ "after a crash). Use one of the --commit options to wait until the",
+ "operation is safely stored on the media.",
+ "",
+ "-c|--commit-after wait for transaction commit at the end of the operation",
+ "-C|--commit-each wait for transaction commit after deleting each subvolume",
NULL
};
static int cmd_subvol_delete(int argc, char **argv)
{
- int res, fd, len, e;
+ int res, len, e, ret = 0;
+ int cnt;
+ int fd = -1;
struct btrfs_ioctl_vol_args args;
char *dname, *vname, *cpath;
+ char *dupdname = NULL;
+ char *dupvname = NULL;
char *path;
+ DIR *dirstream = NULL;
+ int sync_mode = 0;
+ struct option long_options[] = {
+ {"commit-after", no_argument, NULL, 'c'}, /* sync mode 1 */
+ {"commit-each", no_argument, NULL, 'C'}, /* sync mode 2 */
+ {NULL, 0, NULL, 0}
+ };
- if (check_argc_exact(argc, 2))
+ optind = 1;
+ while (1) {
+ int c;
+
+ c = getopt_long(argc, argv, "cC", long_options, NULL);
+ if (c < 0)
+ break;
+
+ switch(c) {
+ case 'c':
+ sync_mode = 1;
+ break;
+ case 'C':
+ sync_mode = 2;
+ break;
+ default:
+ usage(cmd_subvol_delete_usage);
+ }
+ }
+
+ if (check_argc_min(argc - optind, 1))
usage(cmd_subvol_delete_usage);
- path = argv[1];
+ printf("Transaction commit: %s\n",
+ !sync_mode ? "none (default)" :
+ sync_mode == 1 ? "at the end" : "after each");
+
+ cnt = optind;
+
+again:
+ path = argv[cnt];
res = test_issubvolume(path);
- if(res<0){
+ if (res < 0) {
fprintf(stderr, "ERROR: error accessing '%s'\n", path);
- return 12;
+ ret = 1;
+ goto out;
}
- if(!res){
+ if (!res) {
fprintf(stderr, "ERROR: '%s' is not a subvolume\n", path);
- return 13;
+ ret = 1;
+ goto out;
}
- cpath = realpath(path, 0);
- dname = strdup(cpath);
- dname = dirname(dname);
- vname = strdup(cpath);
- vname = basename(vname);
+ cpath = realpath(path, NULL);
+ if (!cpath) {
+ ret = errno;
+ fprintf(stderr, "ERROR: finding real path for '%s': %s\n",
+ path, strerror(errno));
+ goto out;
+ }
+ dupdname = strdup(cpath);
+ dname = dirname(dupdname);
+ dupvname = strdup(cpath);
+ vname = basename(dupvname);
free(cpath);
- if( !strcmp(vname,".") || !strcmp(vname,"..") ||
- strchr(vname, '/') ){
+ if (!strcmp(vname, ".") || !strcmp(vname, "..") ||
+ strchr(vname, '/')) {
fprintf(stderr, "ERROR: incorrect subvolume name ('%s')\n",
vname);
- return 14;
+ ret = 1;
+ goto out;
}
len = strlen(vname);
if (len == 0 || len >= BTRFS_VOL_NAME_MAX) {
fprintf(stderr, "ERROR: snapshot name too long ('%s)\n",
vname);
- return 14;
+ ret = 1;
+ goto out;
}
- fd = open_file_or_dir(dname);
+ fd = open_file_or_dir(dname, &dirstream);
if (fd < 0) {
- close(fd);
- fprintf(stderr, "ERROR: can't access to '%s'\n", dname);
- return 12;
+ fprintf(stderr, "ERROR: can't access '%s'\n", dname);
+ ret = 1;
+ goto out;
}
printf("Delete subvolume '%s/%s'\n", dname, vname);
- strncpy(args.name, vname, BTRFS_PATH_NAME_MAX);
+ strncpy_null(args.name, vname);
res = ioctl(fd, BTRFS_IOC_SNAP_DESTROY, &args);
e = errno;
- close(fd);
-
if(res < 0 ){
fprintf( stderr, "ERROR: cannot delete '%s/%s' - %s\n",
dname, vname, strerror(e));
- return 11;
+ ret = 1;
+ goto out;
}
- return 0;
+ if (sync_mode == 1) {
+ res = wait_for_commit(fd);
+ if (res < 0) {
+ fprintf(stderr,
+ "ERROR: unable to wait for commit after '%s': %s\n",
+ path, strerror(errno));
+ ret = 1;
+ }
+ }
+
+out:
+ free(dupdname);
+ free(dupvname);
+ dupdname = NULL;
+ dupvname = NULL;
+ cnt++;
+ if (cnt < argc) {
+ close_file_or_dir(fd, dirstream);
+ /* avoid double free */
+ fd = -1;
+ dirstream = NULL;
+ goto again;
+ }
+
+ if (sync_mode == 2 && fd != -1) {
+ res = wait_for_commit(fd);
+ if (res < 0) {
+ fprintf(stderr,
+ "ERROR: unable to do final sync: %s\n",
+ strerror(errno));
+ ret = 1;
+ }
+ }
+ close_file_or_dir(fd, dirstream);
+
+ return ret;
}
+/*
+ * Naming of options:
+ * - uppercase for filters and sort options
+ * - lowercase for enabling specific items in the output
+ */
static const char * const cmd_subvol_list_usage[] = {
- "btrfs subvolume list [-p] <path>",
+ "btrfs subvolume list [options] [-G [+|-]value] [-C [+|-]value] "
+ "[--sort=gen,ogen,rootid,path] <path>",
"List subvolumes (and snapshots)",
"",
- "-p print parent ID",
- NULL
+ "-p print parent ID",
+ "-a print all the subvolumes in the filesystem and",
+ " distinguish absolute and relative path with respect",
+ " to the given <path>",
+ "-c print the ogeneration of the subvolume",
+ "-g print the generation of the subvolume",
+ "-o print only subvolumes bellow specified path",
+ "-u print the uuid of subvolumes (and snapshots)",
+ "-q print the parent uuid of the snapshots",
+ "-t print the result as a table",
+ "-s list snapshots only in the filesystem",
+ "-r list readonly subvolumes (including snapshots)",
+ "-d list deleted subvolumes that are not yet cleaned",
+ "-G [+|-]value",
+ " filter the subvolumes by generation",
+ " (+value: >= value; -value: <= value; value: = value)",
+ "-C [+|-]value",
+ " filter the subvolumes by ogeneration",
+ " (+value: >= value; -value: <= value; value: = value)",
+ "--sort=gen,ogen,rootid,path",
+ " list the subvolume in order of gen, ogen, rootid or path",
+ " you also can add '+' or '-' in front of each items.",
+ " (+:ascending, -:descending, ascending default)",
+ NULL,
};
static int cmd_subvol_list(int argc, char **argv)
{
- int fd;
- int ret;
- int print_parent = 0;
+ struct btrfs_list_filter_set *filter_set;
+ struct btrfs_list_comparer_set *comparer_set;
+ u64 flags = 0;
+ int fd = -1;
+ u64 top_id;
+ int ret = -1, uerr = 0;
+ int c;
char *subvol;
+ int is_tab_result = 0;
+ int is_list_all = 0;
+ int is_only_in_path = 0;
+ struct option long_options[] = {
+ {"sort", 1, NULL, 'S'},
+ {NULL, 0, NULL, 0}
+ };
+ DIR *dirstream = NULL;
+
+ filter_set = btrfs_list_alloc_filter_set();
+ comparer_set = btrfs_list_alloc_comparer_set();
optind = 1;
while(1) {
- int c = getopt(argc, argv, "p");
+ c = getopt_long(argc, argv,
+ "acdgopqsurG:C:t", long_options, NULL);
if (c < 0)
break;
switch(c) {
case 'p':
- print_parent = 1;
+ btrfs_list_setup_print_column(BTRFS_LIST_PARENT);
+ break;
+ case 'a':
+ is_list_all = 1;
+ break;
+ case 'c':
+ btrfs_list_setup_print_column(BTRFS_LIST_OGENERATION);
+ break;
+ case 'd':
+ btrfs_list_setup_filter(&filter_set,
+ BTRFS_LIST_FILTER_DELETED,
+ 0);
+ break;
+ case 'g':
+ btrfs_list_setup_print_column(BTRFS_LIST_GENERATION);
+ break;
+ case 'o':
+ is_only_in_path = 1;
break;
+ case 't':
+ is_tab_result = 1;
+ break;
+ case 's':
+ btrfs_list_setup_filter(&filter_set,
+ BTRFS_LIST_FILTER_SNAPSHOT_ONLY,
+ 0);
+ btrfs_list_setup_print_column(BTRFS_LIST_OGENERATION);
+ btrfs_list_setup_print_column(BTRFS_LIST_OTIME);
+ break;
+ case 'u':
+ btrfs_list_setup_print_column(BTRFS_LIST_UUID);
+ break;
+ case 'q':
+ btrfs_list_setup_print_column(BTRFS_LIST_PUUID);
+ break;
+ case 'r':
+ flags |= BTRFS_ROOT_SUBVOL_RDONLY;
+ break;
+ case 'G':
+ btrfs_list_setup_print_column(BTRFS_LIST_GENERATION);
+ ret = btrfs_list_parse_filter_string(optarg,
+ &filter_set,
+ BTRFS_LIST_FILTER_GEN);
+ if (ret) {
+ uerr = 1;
+ goto out;
+ }
+ break;
+
+ case 'C':
+ btrfs_list_setup_print_column(BTRFS_LIST_OGENERATION);
+ ret = btrfs_list_parse_filter_string(optarg,
+ &filter_set,
+ BTRFS_LIST_FILTER_CGEN);
+ if (ret) {
+ uerr = 1;
+ goto out;
+ }
+ break;
+ case 'S':
+ ret = btrfs_list_parse_sort_string(optarg,
+ &comparer_set);
+ if (ret) {
+ uerr = 1;
+ goto out;
+ }
+ break;
+
default:
- usage(cmd_subvol_list_usage);
+ uerr = 1;
+ goto out;
}
}
- if (check_argc_exact(argc - optind, 1))
- usage(cmd_subvol_list_usage);
-
- subvol = argv[optind];
+ if (flags)
+ btrfs_list_setup_filter(&filter_set, BTRFS_LIST_FILTER_FLAGS,
+ flags);
- ret = test_issubvolume(subvol);
- if (ret < 0) {
- fprintf(stderr, "ERROR: error accessing '%s'\n", subvol);
- return 12;
- }
- if (!ret) {
- fprintf(stderr, "ERROR: '%s' is not a subvolume\n", subvol);
- return 13;
+ if (check_argc_exact(argc - optind, 1)) {
+ uerr = 1;
+ goto out;
}
- fd = open_file_or_dir(subvol);
+ subvol = argv[optind];
+ fd = open_file_or_dir(subvol, &dirstream);
if (fd < 0) {
+ ret = -1;
fprintf(stderr, "ERROR: can't access '%s'\n", subvol);
- return 12;
+ goto out;
}
- ret = list_subvols(fd, print_parent, 0);
- if (ret)
- return 19;
- return 0;
+
+ ret = btrfs_list_get_path_rootid(fd, &top_id);
+ if (ret) {
+ fprintf(stderr, "ERROR: can't get rootid for '%s'\n", subvol);
+ goto out;
+ }
+
+ if (is_list_all)
+ btrfs_list_setup_filter(&filter_set,
+ BTRFS_LIST_FILTER_FULL_PATH,
+ top_id);
+ else if (is_only_in_path)
+ btrfs_list_setup_filter(&filter_set,
+ BTRFS_LIST_FILTER_TOPID_EQUAL,
+ top_id);
+
+ /* by default we shall print the following columns*/
+ btrfs_list_setup_print_column(BTRFS_LIST_OBJECTID);
+ btrfs_list_setup_print_column(BTRFS_LIST_GENERATION);
+ btrfs_list_setup_print_column(BTRFS_LIST_TOP_LEVEL);
+ btrfs_list_setup_print_column(BTRFS_LIST_PATH);
+
+ if (is_tab_result)
+ ret = btrfs_list_subvols_print(fd, filter_set, comparer_set,
+ BTRFS_LIST_LAYOUT_TABLE,
+ !is_list_all && !is_only_in_path, NULL);
+ else
+ ret = btrfs_list_subvols_print(fd, filter_set, comparer_set,
+ BTRFS_LIST_LAYOUT_DEFAULT,
+ !is_list_all && !is_only_in_path, NULL);
+
+out:
+ close_file_or_dir(fd, dirstream);
+ if (filter_set)
+ btrfs_list_free_filter_set(filter_set);
+ if (comparer_set)
+ btrfs_list_free_comparer_set(comparer_set);
+ if (uerr)
+ usage(cmd_subvol_list_usage);
+ return !!ret;
}
static const char * const cmd_snapshot_usage[] = {
- "btrfs subvolume snapshot [-r] <source> [<dest>/]<name>",
+ "btrfs subvolume snapshot [-r] <source> <dest>|[<dest>/]<name>",
+ "btrfs subvolume snapshot [-r] [-i <qgroupid>] <source> <dest>|[<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",
+ "the name <name> in the <dest> directory. If only <dest> is given,",
+ "the subvolume will be named the basename of <source>.",
"",
- "-r create a readonly snapshot",
+ "-r create a readonly snapshot",
+ "-i <qgroupid> add the newly created snapshot to a qgroup. This",
+ " option can be given multiple times.",
NULL
};
static int cmd_snapshot(int argc, char **argv)
{
char *subvol, *dst;
- int res, fd, fddst, len, e, readonly = 0;
+ int res, retval;
+ int fd = -1, fddst = -1;
+ int len, readonly = 0;
+ char *dupname = NULL;
+ char *dupdir = NULL;
char *newname;
char *dstdir;
struct btrfs_ioctl_vol_args_v2 args;
-
- memset(&args, 0, sizeof(args));
+ struct btrfs_qgroup_inherit *inherit = NULL;
+ DIR *dirstream1 = NULL, *dirstream2 = NULL;
optind = 1;
+ memset(&args, 0, sizeof(args));
while (1) {
- int c = getopt(argc, argv, "r");
+ int c = getopt(argc, argv, "c:i:r");
if (c < 0)
break;
switch (c) {
+ case 'c':
+ res = qgroup_inherit_add_copy(&inherit, optarg, 0);
+ if (res) {
+ retval = res;
+ goto out;
+ }
+ break;
+ case 'i':
+ res = qgroup_inherit_add_group(&inherit, optarg);
+ if (res) {
+ retval = res;
+ goto out;
+ }
+ break;
case 'r':
readonly = 1;
break;
+ case 'x':
+ res = qgroup_inherit_add_copy(&inherit, optarg, 1);
+ if (res) {
+ retval = res;
+ goto out;
+ }
+ break;
default:
usage(cmd_snapshot_usage);
}
subvol = argv[optind];
dst = argv[optind + 1];
+ retval = 1; /* failure */
res = test_issubvolume(subvol);
- if(res<0){
+ if (res < 0) {
fprintf(stderr, "ERROR: error accessing '%s'\n", subvol);
- return 12;
+ goto out;
}
- if(!res){
+ if (!res) {
fprintf(stderr, "ERROR: '%s' is not a subvolume\n", subvol);
- return 13;
+ goto out;
}
res = test_isdir(dst);
- if(res == 0 ){
+ if (res == 0) {
fprintf(stderr, "ERROR: '%s' exists and it is not a directory\n", dst);
- return 12;
+ goto out;
}
- if(res>0){
- newname = strdup(subvol);
- newname = basename(newname);
+ if (res > 0) {
+ dupname = strdup(subvol);
+ newname = basename(dupname);
dstdir = dst;
- }else{
- newname = strdup(dst);
- newname = basename(newname);
- dstdir = strdup(dst);
- dstdir = dirname(dstdir);
+ } else {
+ dupname = strdup(dst);
+ newname = basename(dupname);
+ dupdir = strdup(dst);
+ dstdir = dirname(dupdir);
}
- if( !strcmp(newname,".") || !strcmp(newname,"..") ||
+ if (!strcmp(newname, ".") || !strcmp(newname, "..") ||
strchr(newname, '/') ){
fprintf(stderr, "ERROR: incorrect snapshot name ('%s')\n",
newname);
- return 14;
+ goto out;
}
len = strlen(newname);
if (len == 0 || len >= BTRFS_VOL_NAME_MAX) {
fprintf(stderr, "ERROR: snapshot name too long ('%s)\n",
newname);
- return 14;
+ goto out;
}
- fddst = open_file_or_dir(dstdir);
+ fddst = open_file_or_dir(dstdir, &dirstream1);
if (fddst < 0) {
- fprintf(stderr, "ERROR: can't access to '%s'\n", dstdir);
- return 12;
+ fprintf(stderr, "ERROR: can't access '%s'\n", dstdir);
+ goto out;
}
- fd = open_file_or_dir(subvol);
+ fd = open_file_or_dir(subvol, &dirstream2);
if (fd < 0) {
- close(fddst);
- fprintf(stderr, "ERROR: can't access to '%s'\n", dstdir);
- return 12;
+ fprintf(stderr, "ERROR: can't access '%s'\n", dstdir);
+ goto out;
}
if (readonly) {
}
args.fd = fd;
- strncpy(args.name, newname, BTRFS_SUBVOL_NAME_MAX);
- res = ioctl(fddst, BTRFS_IOC_SNAP_CREATE_V2, &args);
- e = errno;
+ if (inherit) {
+ args.flags |= BTRFS_SUBVOL_QGROUP_INHERIT;
+ args.size = qgroup_inherit_size(inherit);
+ args.qgroup_inherit = inherit;
+ }
+ strncpy_null(args.name, newname);
- close(fd);
- close(fddst);
+ res = ioctl(fddst, BTRFS_IOC_SNAP_CREATE_V2, &args);
- if(res < 0 ){
+ if (res < 0) {
fprintf( stderr, "ERROR: cannot snapshot '%s' - %s\n",
- subvol, strerror(e));
- return 11;
+ subvol, strerror(errno));
+ goto out;
}
- return 0;
+ retval = 0; /* success */
+
+out:
+ close_file_or_dir(fddst, dirstream1);
+ close_file_or_dir(fd, dirstream2);
+ free(inherit);
+ free(dupname);
+ free(dupdir);
+
+ return retval;
}
static const char * const cmd_subvol_get_default_usage[] = {
- "btrfs subvolume get-d
afault <path>",
+ "btrfs subvolume get-d
efault <path>",
"Get the default subvolume of a filesystem",
NULL
};
static int cmd_subvol_get_default(int argc, char **argv)
{
- int fd;
+ int fd = -1;
int ret;
char *subvol;
+ struct btrfs_list_filter_set *filter_set;
+ u64 default_id;
+ DIR *dirstream = NULL;
if (check_argc_exact(argc, 2))
usage(cmd_subvol_get_default_usage);
subvol = argv[1];
+ fd = open_file_or_dir(subvol, &dirstream);
+ if (fd < 0) {
+ fprintf(stderr, "ERROR: can't access '%s'\n", subvol);
+ return 1;
+ }
- ret = test_issubvolume(subvol);
- if (ret < 0) {
- fprintf(stderr, "ERROR: error accessing '%s'\n", subvol);
- return 12;
+ ret = btrfs_list_get_default_subvolume(fd, &default_id);
+ if (ret) {
+ fprintf(stderr, "ERROR: can't perform the search - %s\n",
+ strerror(errno));
+ goto out;
}
- if (!ret) {
- fprintf(stderr, "ERROR: '%s' is not a subvolume\n", subvol);
- return 13;
+
+ ret = 1;
+ if (default_id == 0) {
+ fprintf(stderr, "ERROR: 'default' dir item not found\n");
+ goto out;
}
- fd = open_file_or_dir(subvol);
- if (fd < 0) {
- fprintf(stderr, "ERROR: can't access '%s'\n", subvol);
- return 12;
+ /* no need to resolve roots if FS_TREE is default */
+ if (default_id == BTRFS_FS_TREE_OBJECTID) {
+ printf("ID 5 (FS_TREE)\n");
+ ret = 0;
+ goto out;
}
- ret = list_subvols(fd, 0, 1);
- if (ret)
- return 19;
- return 0;
+
+ filter_set = btrfs_list_alloc_filter_set();
+ btrfs_list_setup_filter(&filter_set, BTRFS_LIST_FILTER_ROOTID,
+ default_id);
+
+ /* by default we shall print the following columns*/
+ btrfs_list_setup_print_column(BTRFS_LIST_OBJECTID);
+ btrfs_list_setup_print_column(BTRFS_LIST_GENERATION);
+ btrfs_list_setup_print_column(BTRFS_LIST_TOP_LEVEL);
+ btrfs_list_setup_print_column(BTRFS_LIST_PATH);
+
+ ret = btrfs_list_subvols_print(fd, filter_set, NULL,
+ BTRFS_LIST_LAYOUT_DEFAULT, 1, NULL);
+
+ if (filter_set)
+ btrfs_list_free_filter_set(filter_set);
+out:
+ close_file_or_dir(fd, dirstream);
+ return !!ret;
}
static const char * const cmd_subvol_set_default_usage[] = {
- "btrfs subvolume set-d
afault <subvolid> <path>",
+ "btrfs subvolume set-d
efault <subvolid> <path>",
"Set the default subvolume of a filesystem",
NULL
};
u64 objectid;
char *path;
char *subvolid;
+ DIR *dirstream = NULL;
if (check_argc_exact(argc, 3))
usage(cmd_subvol_set_default_usage);
subvolid = argv[1];
path = argv[2];
- fd = open_file_or_dir(path);
+ objectid = arg_strtou64(subvolid);
+
+ fd = open_file_or_dir(path, &dirstream);
if (fd < 0) {
- fprintf(stderr, "ERROR: can't access to '%s'\n", path);
- return 12;
+ fprintf(stderr, "ERROR: can't access '%s'\n", path);
+ return 1;
}
- objectid = (unsigned long long)strtoll(subvolid, NULL, 0);
- if (errno == ERANGE) {
- fprintf(stderr, "ERROR: invalid tree id (%s)\n",subvolid);
- return 30;
- }
ret = ioctl(fd, BTRFS_IOC_DEFAULT_SUBVOL, &objectid);
e = errno;
- close(fd);
- if( ret < 0 ){
+ close_file_or_dir(fd, dirstream);
+ if (ret < 0) {
fprintf(stderr, "ERROR: unable to set a new default subvolume - %s\n",
strerror(e));
- return 30;
+ return 1;
}
return 0;
}
int ret;
char *subvol;
u64 last_gen;
+ DIR *dirstream = NULL;
if (check_argc_exact(argc, 3))
usage(cmd_find_new_usage);
subvol = argv[1];
- last_gen = atoll(argv[2]);
+ last_gen = arg_strtou64(argv[2]);
ret = test_issubvolume(subvol);
if (ret < 0) {
fprintf(stderr, "ERROR: error accessing '%s'\n", subvol);
- return 12;
+ return 1;
}
if (!ret) {
fprintf(stderr, "ERROR: '%s' is not a subvolume\n", subvol);
- return 13;
+ return 1;
}
- fd = open_file_or_dir(subvol);
+ fd = open_file_or_dir(subvol, &dirstream);
if (fd < 0) {
fprintf(stderr, "ERROR: can't access '%s'\n", subvol);
- return 12;
+ return 1;
}
- ret = find_updated_files(fd, 0, last_gen);
- if (ret)
- return 19;
- return 0;
+
+ ret = ioctl(fd, BTRFS_IOC_SYNC);
+ if (ret < 0) {
+ fprintf(stderr, "ERROR: unable to fs-syncing '%s' - %s\n",
+ subvol, strerror(errno));
+ close_file_or_dir(fd, dirstream);
+ return 1;
+ }
+
+ ret = btrfs_list_find_updated_files(fd, 0, last_gen);
+ close_file_or_dir(fd, dirstream);
+ return !!ret;
+}
+
+static const char * const cmd_subvol_show_usage[] = {
+ "btrfs subvolume show <subvol-path>",
+ "Show more information of the subvolume",
+ NULL
+};
+
+static int cmd_subvol_show(int argc, char **argv)
+{
+ struct root_info get_ri;
+ struct btrfs_list_filter_set *filter_set;
+ char tstr[256];
+ char uuidparse[BTRFS_UUID_UNPARSED_SIZE];
+ char *fullpath = NULL, *svpath = NULL, *mnt = NULL;
+ char raw_prefix[] = "\t\t\t\t";
+ u64 sv_id, mntid;
+ int fd = -1, mntfd = -1;
+ int ret = 1;
+ DIR *dirstream1 = NULL, *dirstream2 = NULL;
+
+ if (check_argc_exact(argc, 2))
+ usage(cmd_subvol_show_usage);
+
+ fullpath = realpath(argv[1], NULL);
+ if (!fullpath) {
+ fprintf(stderr, "ERROR: finding real path for '%s', %s\n",
+ argv[1], strerror(errno));
+ goto out;
+ }
+
+ ret = test_issubvolume(fullpath);
+ if (ret < 0) {
+ fprintf(stderr, "ERROR: error accessing '%s'\n", fullpath);
+ goto out;
+ }
+ if (!ret) {
+ fprintf(stderr, "ERROR: '%s' is not a subvolume\n", fullpath);
+ goto out;
+ }
+
+ ret = find_mount_root(fullpath, &mnt);
+ if (ret < 0) {
+ fprintf(stderr, "ERROR: find_mount_root failed on %s: "
+ "%s\n", fullpath, strerror(-ret));
+ goto out;
+ }
+ ret = 1;
+ svpath = get_subvol_name(mnt, fullpath);
+
+ fd = open_file_or_dir(fullpath, &dirstream1);
+ if (fd < 0) {
+ fprintf(stderr, "ERROR: can't access '%s'\n", fullpath);
+ goto out;
+ }
+
+ ret = btrfs_list_get_path_rootid(fd, &sv_id);
+ if (ret) {
+ fprintf(stderr, "ERROR: can't get rootid for '%s'\n",
+ fullpath);
+ goto out;
+ }
+
+ mntfd = open_file_or_dir(mnt, &dirstream2);
+ if (mntfd < 0) {
+ fprintf(stderr, "ERROR: can't access '%s'\n", mnt);
+ goto out;
+ }
+
+ ret = btrfs_list_get_path_rootid(mntfd, &mntid);
+ if (ret) {
+ fprintf(stderr, "ERROR: can't get rootid for '%s'\n", mnt);
+ goto out;
+ }
+
+ if (sv_id == BTRFS_FS_TREE_OBJECTID) {
+ printf("%s is btrfs root\n", fullpath);
+ goto out;
+ }
+
+ memset(&get_ri, 0, sizeof(get_ri));
+ get_ri.root_id = sv_id;
+
+ if (btrfs_get_subvol(mntfd, &get_ri)) {
+ fprintf(stderr, "ERROR: can't find '%s'\n",
+ svpath);
+ goto out;
+ }
+
+ ret = 0;
+ /* print the info */
+ printf("%s\n", fullpath);
+ printf("\tName: \t\t\t%s\n", get_ri.name);
+
+ if (uuid_is_null(get_ri.uuid))
+ strcpy(uuidparse, "-");
+ else
+ uuid_unparse(get_ri.uuid, uuidparse);
+ printf("\tuuid: \t\t\t%s\n", uuidparse);
+
+ if (uuid_is_null(get_ri.puuid))
+ strcpy(uuidparse, "-");
+ else
+ uuid_unparse(get_ri.puuid, uuidparse);
+ printf("\tParent uuid: \t\t%s\n", uuidparse);
+
+ if (get_ri.otime) {
+ struct tm tm;
+
+ localtime_r(&get_ri.otime, &tm);
+ strftime(tstr, 256, "%Y-%m-%d %X", &tm);
+ } else
+ strcpy(tstr, "-");
+ printf("\tCreation time: \t\t%s\n", tstr);
+
+ printf("\tObject ID: \t\t%llu\n", get_ri.root_id);
+ printf("\tGeneration (Gen): \t%llu\n", get_ri.gen);
+ printf("\tGen at creation: \t%llu\n", get_ri.ogen);
+ printf("\tParent: \t\t%llu\n", get_ri.ref_tree);
+ printf("\tTop Level: \t\t%llu\n", get_ri.top_id);
+
+ if (get_ri.flags & BTRFS_ROOT_SUBVOL_RDONLY)
+ printf("\tFlags: \t\t\treadonly\n");
+ else
+ printf("\tFlags: \t\t\t-\n");
+
+ /* print the snapshots of the given subvol if any*/
+ printf("\tSnapshot(s):\n");
+ filter_set = btrfs_list_alloc_filter_set();
+ btrfs_list_setup_filter(&filter_set, BTRFS_LIST_FILTER_BY_PARENT,
+ (u64)(unsigned long)get_ri.uuid);
+ btrfs_list_setup_print_column(BTRFS_LIST_PATH);
+ btrfs_list_subvols_print(fd, filter_set, NULL, BTRFS_LIST_LAYOUT_RAW,
+ 1, raw_prefix);
+
+ /* clean up */
+ free(get_ri.path);
+ free(get_ri.name);
+ free(get_ri.full_path);
+ btrfs_list_free_filter_set(filter_set);
+
+out:
+ close_file_or_dir(fd, dirstream1);
+ close_file_or_dir(mntfd, dirstream2);
+ free(mnt);
+ free(fullpath);
+ return !!ret;
}
const struct cmd_group subvolume_cmd_group = {
{ "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 }
+ { "show", cmd_subvol_show, cmd_subvol_show_usage, NULL, 0 },
+ NULL_CMD_STRUCT
}
};
projects / platform / upstream / btrfs-progs.git / blobdiff