* Boston, MA 021110-1307, USA.
*/
+#include <inttypes.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#include <errno.h>
#include <sys/stat.h>
+#include <sys/vfs.h>
#include <libgen.h>
#include <limits.h>
#include <getopt.h>
#include <uuid/uuid.h>
+#include <linux/magic.h>
+
+#include <btrfsutil.h>
#include "kerncompat.h"
#include "ioctl.h"
#include "utils.h"
#include "btrfs-list.h"
#include "utils.h"
+#include "help.h"
-static int is_subvolume_cleaned(int fd, u64 subvolid)
+static int wait_for_subvolume_cleaning(int fd, size_t count, uint64_t *ids,
+ int sleep_interval)
{
- int ret;
- struct btrfs_ioctl_search_args args;
- struct btrfs_ioctl_search_key *sk = &args.key;
-
- sk->tree_id = BTRFS_ROOT_TREE_OBJECTID;
- sk->min_objectid = subvolid;
- sk->max_objectid = subvolid;
- sk->min_type = BTRFS_ROOT_ITEM_KEY;
- sk->max_type = BTRFS_ROOT_ITEM_KEY;
- sk->min_offset = 0;
- sk->max_offset = (u64)-1;
- sk->min_transid = 0;
- sk->max_transid = (u64)-1;
- sk->nr_items = 1;
-
- ret = ioctl(fd, BTRFS_IOC_TREE_SEARCH, &args);
- if (ret < 0)
- return -errno;
-
- if (sk->nr_items == 0)
- return 1;
-
- return 0;
-}
-
-static int wait_for_subvolume_cleaning(int fd, int count, u64 *ids,
- int sleep_interval)
-{
- int ret;
- int i;
+ size_t i;
+ enum btrfs_util_error err;
while (1) {
int clean = 1;
for (i = 0; i < count; i++) {
if (!ids[i])
continue;
- ret = is_subvolume_cleaned(fd, ids[i]);
- if (ret < 0) {
- fprintf(stderr,
- "ERROR: can't perform the search - %s\n",
- strerror(-ret));
- return ret;
- }
- if (ret) {
- printf("Subvolume id %llu is gone\n", ids[i]);
+ err = btrfs_util_subvolume_info_fd(fd, ids[i], NULL);
+ if (err == BTRFS_UTIL_ERROR_SUBVOLUME_NOT_FOUND) {
+ printf("Subvolume id %" PRIu64 " is gone\n",
+ ids[i]);
ids[i] = 0;
+ } else if (err) {
+ error_btrfs_util(err);
+ return -errno;
} else {
clean = 0;
}
struct btrfs_qgroup_inherit *inherit = NULL;
DIR *dirstream = NULL;
- optind = 1;
while (1) {
- int c = getopt(argc, argv, "c:i:v");
+ int c = getopt(argc, argv, "c:i:");
if (c < 0)
break;
retval = 1; /* failure */
res = test_isdir(dst);
+ if (res < 0 && res != -ENOENT) {
+ error("cannot access %s: %s", dst, strerror(-res));
+ goto out;
+ }
if (res >= 0) {
- fprintf(stderr, "ERROR: '%s' exists\n", dst);
+ error("target path already exists: %s", dst);
goto out;
}
dstdir = dirname(dupdir);
if (!test_issubvolname(newname)) {
- fprintf(stderr, "ERROR: incorrect subvolume name '%s'\n",
- newname);
+ error("invalid subvolume name: %s", newname);
goto out;
}
len = strlen(newname);
if (len == 0 || len >= BTRFS_VOL_NAME_MAX) {
- fprintf(stderr, "ERROR: subvolume name too long '%s'\n",
- newname);
+ error("subvolume name too long: %s", newname);
goto out;
}
- fddst = open_file_or_dir(dstdir, &dirstream);
- if (fddst < 0) {
- fprintf(stderr, "ERROR: can't access '%s'\n", dstdir);
+ fddst = btrfs_open_dir(dstdir, &dirstream, 1);
+ if (fddst < 0)
goto out;
- }
printf("Create subvolume '%s/%s'\n", dstdir, newname);
if (inherit) {
}
if (res < 0) {
- fprintf(stderr, "ERROR: cannot create subvolume - %s\n",
- strerror(errno));
+ error("cannot create subvolume: %m");
goto out;
}
return retval;
}
-/*
- * test if path is a subvolume:
- * this function return
- * 0-> path exists but it is not a subvolume
- * 1-> path exists and it is a subvolume
- * -1 -> path is unaccessible
- */
-int test_issubvolume(char *path)
+static int wait_for_commit(int fd)
{
- struct stat st;
- int res;
+ enum btrfs_util_error err;
+ uint64_t transid;
- res = stat(path, &st);
- if(res < 0 )
+ err = btrfs_util_start_sync_fd(fd, &transid);
+ if (err)
return -1;
- return (st.st_ino == 256) && S_ISDIR(st.st_mode);
-}
-
-static int wait_for_commit(int fd)
-{
- int ret;
+ err = btrfs_util_wait_sync_fd(fd, transid);
+ if (err)
+ return -1;
- ret = ioctl(fd, BTRFS_IOC_START_SYNC, NULL);
- if (ret < 0)
- return ret;
- return ioctl(fd, BTRFS_IOC_WAIT_SYNC, NULL);
+ return 0;
}
static const char * const cmd_subvol_delete_usage[] = {
"",
"-c|--commit-after wait for transaction commit at the end of the operation",
"-C|--commit-each wait for transaction commit after deleting each subvolume",
+ "-v|--verbose verbose output of operations",
NULL
};
static int cmd_subvol_delete(int argc, char **argv)
{
- int res, e, ret = 0;
+ int res, ret = 0;
int cnt;
int fd = -1;
- struct btrfs_ioctl_vol_args args;
char *dname, *vname, *cpath;
char *dupdname = NULL;
char *dupvname = NULL;
DIR *dirstream = NULL;
int verbose = 0;
int commit_mode = 0;
+ u8 fsid[BTRFS_FSID_SIZE];
+ char uuidbuf[BTRFS_UUID_UNPARSED_SIZE];
+ struct seen_fsid *seen_fsid_hash[SEEN_FSID_HASH_SIZE] = { NULL, };
+ enum { COMMIT_AFTER = 1, COMMIT_EACH = 2 };
+ enum btrfs_util_error err;
- optind = 1;
while (1) {
int c;
static const struct option long_options[] = {
- {"commit-after", no_argument, NULL, 'c'}, /* commit mode 1 */
- {"commit-each", no_argument, NULL, 'C'}, /* commit mode 2 */
+ {"commit-after", no_argument, NULL, 'c'},
+ {"commit-each", no_argument, NULL, 'C'},
+ {"verbose", no_argument, NULL, 'v'},
{NULL, 0, NULL, 0}
};
- c = getopt_long(argc, argv, "cC", long_options, NULL);
+ c = getopt_long(argc, argv, "cCv", long_options, NULL);
if (c < 0)
break;
switch(c) {
case 'c':
- commit_mode = 1;
+ commit_mode = COMMIT_AFTER;
break;
case 'C':
- commit_mode = 2;
+ commit_mode = COMMIT_EACH;
break;
case 'v':
verbose++;
if (verbose > 0) {
printf("Transaction commit: %s\n",
!commit_mode ? "none (default)" :
- commit_mode == 1 ? "at the end" : "after each");
+ commit_mode == COMMIT_AFTER ? "at the end" : "after each");
}
cnt = optind;
again:
path = argv[cnt];
- res = test_issubvolume(path);
- if (res < 0) {
- fprintf(stderr, "ERROR: error accessing '%s'\n", path);
- ret = 1;
- goto out;
- }
- if (!res) {
- fprintf(stderr, "ERROR: '%s' is not a subvolume\n", path);
+ err = btrfs_util_is_subvolume(path);
+ if (err) {
+ error_btrfs_util(err);
ret = 1;
goto out;
}
cpath = realpath(path, NULL);
if (!cpath) {
ret = errno;
- fprintf(stderr, "ERROR: finding real path for '%s': %s\n",
- path, strerror(errno));
+ error("cannot find real path for '%s': %m", path);
goto out;
}
dupdname = strdup(cpath);
vname = basename(dupvname);
free(cpath);
- fd = open_file_or_dir(dname, &dirstream);
+ fd = btrfs_open_dir(dname, &dirstream, 1);
if (fd < 0) {
- fprintf(stderr, "ERROR: can't access '%s'\n", dname);
ret = 1;
goto out;
}
printf("Delete subvolume (%s): '%s/%s'\n",
- commit_mode == 2 || (commit_mode == 1 && cnt + 1 == argc)
+ commit_mode == COMMIT_EACH || (commit_mode == COMMIT_AFTER && cnt + 1 == argc)
? "commit" : "no-commit", dname, vname);
- memset(&args, 0, sizeof(args));
- strncpy_null(args.name, vname);
- res = ioctl(fd, BTRFS_IOC_SNAP_DESTROY, &args);
- e = errno;
- if(res < 0 ){
- fprintf( stderr, "ERROR: cannot delete '%s/%s' - %s\n",
- dname, vname, strerror(e));
+ err = btrfs_util_delete_subvolume_fd(fd, vname, 0);
+ if (err) {
+ error_btrfs_util(err);
ret = 1;
goto out;
}
- if (commit_mode == 1) {
+ if (commit_mode == COMMIT_EACH) {
res = wait_for_commit(fd);
if (res < 0) {
- fprintf(stderr,
- "ERROR: unable to wait for commit after '%s': %s\n",
- path, strerror(errno));
+ error("unable to wait for commit after '%s': %m", path);
ret = 1;
}
+ } else if (commit_mode == COMMIT_AFTER) {
+ res = get_fsid(dname, fsid, 0);
+ if (res < 0) {
+ error("unable to get fsid for '%s': %s",
+ path, strerror(-res));
+ error(
+ "delete succeeded but commit may not be done in the end");
+ ret = 1;
+ goto out;
+ }
+
+ if (add_seen_fsid(fsid, seen_fsid_hash, fd, dirstream) == 0) {
+ if (verbose > 0) {
+ uuid_unparse(fsid, uuidbuf);
+ printf(" new fs is found for '%s', fsid: %s\n",
+ path, uuidbuf);
+ }
+ /*
+ * This is the first time a subvolume on this
+ * filesystem is deleted, keep fd in order to issue
+ * SYNC ioctl in the end
+ */
+ goto keep_fd;
+ }
}
out:
+ close_file_or_dir(fd, dirstream);
+keep_fd:
+ fd = -1;
+ dirstream = NULL;
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;
+ if (cnt < argc)
goto again;
- }
- if (commit_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;
+ if (commit_mode == COMMIT_AFTER) {
+ int slot;
+
+ /*
+ * Traverse seen_fsid_hash and issue SYNC ioctl on each
+ * filesystem
+ */
+ for (slot = 0; slot < SEEN_FSID_HASH_SIZE; slot++) {
+ struct seen_fsid *seen = seen_fsid_hash[slot];
+
+ while (seen) {
+ res = wait_for_commit(seen->fd);
+ if (res < 0) {
+ uuid_unparse(seen->fsid, uuidbuf);
+ error(
+ "unable to do final sync after deletion: %m, fsid: %s",
+ uuidbuf);
+ ret = 1;
+ } else if (verbose > 0) {
+ uuid_unparse(seen->fsid, uuidbuf);
+ printf("final sync is done for fsid: %s\n",
+ uuidbuf);
+ }
+ seen = seen->next;
+ }
}
+ /* fd will also be closed in free_seen_fsid */
+ free_seen_fsid(seen_fsid_hash);
}
- close_file_or_dir(fd, dirstream);
return ret;
}
* - lowercase for enabling specific items in the output
*/
static const char * const cmd_subvol_list_usage[] = {
- "btrfs subvolume list [options] [-G [+|-]value] [-C [+|-]value] "
- "[--sort=gen,ogen,rootid,path] <path>",
- "List subvolumes (and snapshots)",
+ "btrfs subvolume list [options] <path>",
+ "List subvolumes and snapshots in the filesystem.",
"",
- "-p print parent ID",
+ "Path filtering:",
+ "-o print only subvolumes below specified path",
"-a print all the subvolumes in the filesystem and",
" distinguish absolute and relative path with respect",
" to the given <path>",
+ "",
+ "Field selection:",
+ "-p print parent ID",
"-c print the ogeneration of the subvolume",
"-g print the generation of the subvolume",
- "-o print only subvolumes below specified path",
"-u print the uuid of subvolumes (and snapshots)",
"-q print the parent uuid of the snapshots",
"-R print the uuid of the received snapshots",
- "-t print the result as a table",
- "-s list snapshots only in the filesystem",
+ "",
+ "Type filtering:",
+ "-s list only snapshots",
"-r list readonly subvolumes (including snapshots)",
"-d list deleted subvolumes that are not yet cleaned",
+ "",
+ "Other:",
+ "-t print the result as a table",
+ "",
+ "Sorting:",
"-G [+|-]value",
" filter the subvolumes by generation",
" (+value: >= value; -value: <= value; value: = value)",
u64 top_id;
int ret = -1, uerr = 0;
char *subvol;
- int is_tab_result = 0;
int is_list_all = 0;
int is_only_in_path = 0;
DIR *dirstream = NULL;
+ enum btrfs_list_layout layout = BTRFS_LIST_LAYOUT_DEFAULT;
filter_set = btrfs_list_alloc_filter_set();
comparer_set = btrfs_list_alloc_comparer_set();
- optind = 1;
while(1) {
int c;
static const struct option long_options[] = {
is_only_in_path = 1;
break;
case 't':
- is_tab_result = 1;
+ layout = BTRFS_LIST_LAYOUT_TABLE;
break;
case 's':
btrfs_list_setup_filter(&filter_set,
}
}
- if (flags)
- btrfs_list_setup_filter(&filter_set, BTRFS_LIST_FILTER_FLAGS,
- flags);
-
if (check_argc_exact(argc - optind, 1)) {
uerr = 1;
goto out;
}
subvol = argv[optind];
- fd = open_file_or_dir(subvol, &dirstream);
+ fd = btrfs_open_dir(subvol, &dirstream, 1);
if (fd < 0) {
ret = -1;
- fprintf(stderr, "ERROR: can't access '%s'\n", subvol);
+ error("can't access '%s'", subvol);
goto out;
}
+ if (flags)
+ btrfs_list_setup_filter(&filter_set, BTRFS_LIST_FILTER_FLAGS,
+ flags);
+
ret = btrfs_list_get_path_rootid(fd, &top_id);
- if (ret) {
- fprintf(stderr, "ERROR: can't get rootid for '%s'\n", subvol);
+ if (ret)
goto out;
- }
if (is_list_all)
btrfs_list_setup_filter(&filter_set,
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);
+ ret = btrfs_list_subvols_print(fd, filter_set, comparer_set,
+ layout, !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);
+ free(filter_set);
if (comparer_set)
- btrfs_list_free_comparer_set(comparer_set);
+ free(comparer_set);
if (uerr)
usage(cmd_subvol_list_usage);
return !!ret;
char *dupdir = NULL;
char *newname;
char *dstdir;
+ enum btrfs_util_error err;
struct btrfs_ioctl_vol_args_v2 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, "c:i:r");
dst = argv[optind + 1];
retval = 1; /* failure */
- res = test_issubvolume(subvol);
- if (res < 0) {
- fprintf(stderr, "ERROR: error accessing '%s'\n", subvol);
- goto out;
- }
- if (!res) {
- fprintf(stderr, "ERROR: '%s' is not a subvolume\n", subvol);
+ err = btrfs_util_is_subvolume(subvol);
+ if (err) {
+ error_btrfs_util(err);
goto out;
}
res = test_isdir(dst);
+ if (res < 0 && res != -ENOENT) {
+ error("cannot access %s: %s", dst, strerror(-res));
+ goto out;
+ }
if (res == 0) {
- fprintf(stderr, "ERROR: '%s' exists and it is not a directory\n", dst);
+ error("'%s' exists and it is not a directory", dst);
goto out;
}
}
if (!test_issubvolname(newname)) {
- fprintf(stderr, "ERROR: incorrect snapshot name '%s'\n",
- newname);
+ error("invalid snapshot name '%s'", newname);
goto out;
}
len = strlen(newname);
if (len == 0 || len >= BTRFS_VOL_NAME_MAX) {
- fprintf(stderr, "ERROR: snapshot name too long '%s'\n",
- newname);
+ error("snapshot name too long '%s'", newname);
goto out;
}
- fddst = open_file_or_dir(dstdir, &dirstream1);
- if (fddst < 0) {
- fprintf(stderr, "ERROR: can't access '%s'\n", dstdir);
+ fddst = btrfs_open_dir(dstdir, &dirstream1, 1);
+ if (fddst < 0)
goto out;
- }
- fd = open_file_or_dir(subvol, &dirstream2);
- if (fd < 0) {
- fprintf(stderr, "ERROR: can't access '%s'\n", dstdir);
+ fd = btrfs_open_dir(subvol, &dirstream2, 1);
+ if (fd < 0)
goto out;
- }
if (readonly) {
args.flags |= BTRFS_SUBVOL_RDONLY;
res = ioctl(fddst, BTRFS_IOC_SNAP_CREATE_V2, &args);
if (res < 0) {
- fprintf( stderr, "ERROR: cannot snapshot '%s' - %s\n",
- subvol, strerror(errno));
+ error("cannot snapshot '%s': %m", subvol);
goto out;
}
static int cmd_subvol_get_default(int argc, char **argv)
{
int fd = -1;
- int ret;
- char *subvol;
- struct btrfs_list_filter_set *filter_set;
- u64 default_id;
+ int ret = 1;
+ uint64_t default_id;
DIR *dirstream = NULL;
+ enum btrfs_util_error err;
+ struct btrfs_util_subvolume_info subvol;
+ char *path;
+
+ clean_args_no_options(argc, argv, cmd_subvol_get_default_usage);
- if (check_argc_exact(argc, 2))
+ if (check_argc_exact(argc - optind, 1))
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);
+ fd = btrfs_open_dir(argv[1], &dirstream, 1);
+ if (fd < 0)
return 1;
- }
- 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;
- }
-
- ret = 1;
- if (default_id == 0) {
- fprintf(stderr, "ERROR: 'default' dir item not found\n");
+ err = btrfs_util_get_default_subvolume_fd(fd, &default_id);
+ if (err) {
+ error_btrfs_util(err);
goto out;
}
goto out;
}
- filter_set = btrfs_list_alloc_filter_set();
- btrfs_list_setup_filter(&filter_set, BTRFS_LIST_FILTER_ROOTID,
- default_id);
+ err = btrfs_util_subvolume_info_fd(fd, default_id, &subvol);
+ if (err) {
+ error_btrfs_util(err);
+ goto out;
+ }
- /* 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);
+ err = btrfs_util_subvolume_path_fd(fd, default_id, &path);
+ if (err) {
+ error_btrfs_util(err);
+ goto out;
+ }
- ret = btrfs_list_subvols_print(fd, filter_set, NULL,
- BTRFS_LIST_LAYOUT_DEFAULT, 1, NULL);
+ printf("ID %" PRIu64 " gen %" PRIu64 " top level %" PRIu64 " path %s\n",
+ subvol.id, subvol.generation, subvol.parent_id, path);
- if (filter_set)
- btrfs_list_free_filter_set(filter_set);
+ free(path);
+
+ ret = 0;
out:
close_file_or_dir(fd, dirstream);
- return !!ret;
+ return ret;
}
static const char * const cmd_subvol_set_default_usage[] = {
+ "btrfs subvolume set-default <subvolume>\n"
"btrfs subvolume set-default <subvolid> <path>",
- "Set the default subvolume of a filesystem",
+ "Set the default subvolume of the filesystem mounted as default.",
+ "The subvolume can be specified by its path,",
+ "or the pair of subvolume id and path to the filesystem.",
NULL
};
static int cmd_subvol_set_default(int argc, char **argv)
{
- int ret=0, fd, e;
- u64 objectid;
- char *path;
- char *subvolid;
- DIR *dirstream = NULL;
+ u64 objectid;
+ char *path;
+ enum btrfs_util_error err;
- if (check_argc_exact(argc, 3))
- usage(cmd_subvol_set_default_usage);
-
- subvolid = argv[1];
- path = argv[2];
+ clean_args_no_options(argc, argv, cmd_subvol_set_default_usage);
- objectid = arg_strtou64(subvolid);
+ if (check_argc_min(argc - optind, 1) ||
+ check_argc_max(argc - optind, 2))
+ usage(cmd_subvol_set_default_usage);
- fd = open_file_or_dir(path, &dirstream);
- if (fd < 0) {
- fprintf(stderr, "ERROR: can't access '%s'\n", path);
- return 1;
+ if (argc - optind == 1) {
+ /* path to the subvolume is specified */
+ objectid = 0;
+ path = argv[optind];
+ } else {
+ /* subvol id and path to the filesystem are specified */
+ objectid = arg_strtou64(argv[optind]);
+ path = argv[optind + 1];
}
- ret = ioctl(fd, BTRFS_IOC_DEFAULT_SUBVOL, &objectid);
- e = errno;
- close_file_or_dir(fd, dirstream);
- if (ret < 0) {
- fprintf(stderr, "ERROR: unable to set a new default subvolume - %s\n",
- strerror(e));
+ err = btrfs_util_set_default_subvolume(path, objectid);
+ if (err) {
+ error_btrfs_util(err);
return 1;
}
return 0;
char *subvol;
u64 last_gen;
DIR *dirstream = NULL;
+ enum btrfs_util_error err;
- if (check_argc_exact(argc, 3))
+ clean_args_no_options(argc, argv, cmd_subvol_find_new_usage);
+
+ if (check_argc_exact(argc - optind, 2))
usage(cmd_subvol_find_new_usage);
- subvol = argv[1];
- last_gen = arg_strtou64(argv[2]);
+ subvol = argv[optind];
+ last_gen = arg_strtou64(argv[optind + 1]);
- ret = test_issubvolume(subvol);
- if (ret < 0) {
- fprintf(stderr, "ERROR: error accessing '%s'\n", subvol);
- return 1;
- }
- if (!ret) {
- fprintf(stderr, "ERROR: '%s' is not a subvolume\n", subvol);
+ err = btrfs_util_is_subvolume(subvol);
+ if (err) {
+ error_btrfs_util(err);
return 1;
}
- fd = open_file_or_dir(subvol, &dirstream);
- if (fd < 0) {
- fprintf(stderr, "ERROR: can't access '%s'\n", subvol);
+ fd = btrfs_open_dir(subvol, &dirstream, 1);
+ if (fd < 0)
return 1;
- }
- ret = ioctl(fd, BTRFS_IOC_SYNC);
- if (ret < 0) {
- fprintf(stderr, "ERROR: unable to fs-syncing '%s' - %s\n",
- subvol, strerror(errno));
+ err = btrfs_util_sync_fd(fd);
+ if (err) {
+ error_btrfs_util(err);
close_file_or_dir(fd, dirstream);
return 1;
}
}
static const char * const cmd_subvol_show_usage[] = {
- "btrfs subvolume show <subvol-path>",
- "Show more information of the subvolume",
+ "btrfs subvolume show [options] <subvol-path>|<mnt>",
+ "Show more information about the subvolume",
+ "-r|--rootid rootid of the subvolume",
+ "-u|--uuid uuid of the subvolume",
+ "",
+ "If no option is specified, <subvol-path> will be shown, otherwise",
+ "the rootid or uuid are resolved relative to the <mnt> path.",
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;
- int fd = -1, mntfd = -1;
+ char *fullpath = NULL;
+ int fd = -1;
int ret = 1;
- DIR *dirstream1 = NULL, *dirstream2 = NULL;
+ DIR *dirstream1 = NULL;
+ int by_rootid = 0;
+ int by_uuid = 0;
+ u64 rootid_arg = 0;
+ u8 uuid_arg[BTRFS_UUID_SIZE];
+ struct btrfs_util_subvolume_iterator *iter;
+ struct btrfs_util_subvolume_info subvol;
+ char *subvol_path = NULL;
+ enum btrfs_util_error err;
- if (check_argc_exact(argc, 2))
- usage(cmd_subvol_show_usage);
+ while (1) {
+ int c;
+ static const struct option long_options[] = {
+ { "rootid", required_argument, NULL, 'r'},
+ { "uuid", required_argument, NULL, 'u'},
+ { NULL, 0, NULL, 0 }
+ };
- fullpath = realpath(argv[1], NULL);
- if (!fullpath) {
- fprintf(stderr, "ERROR: finding real path for '%s', %s\n",
- argv[1], strerror(errno));
- goto out;
- }
+ c = getopt_long(argc, argv, "r:u:", long_options, NULL);
+ if (c < 0)
+ break;
- 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);
- ret = 1;
- goto out;
+ switch (c) {
+ case 'r':
+ rootid_arg = arg_strtou64(optarg);
+ by_rootid = 1;
+ break;
+ case 'u':
+ uuid_parse(optarg, uuid_arg);
+ by_uuid = 1;
+ break;
+ default:
+ usage(cmd_subvol_show_usage);
+ }
}
- 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;
+ if (check_argc_exact(argc - optind, 1))
+ usage(cmd_subvol_show_usage);
+
+ if (by_rootid && by_uuid) {
+ error(
+ "options --rootid and --uuid cannot be used at the same time");
+ usage(cmd_subvol_show_usage);
}
- if (ret > 0) {
- fprintf(stderr,
- "ERROR: %s doesn't belong to btrfs mount point\n",
- fullpath);
+
+ fullpath = realpath(argv[optind], NULL);
+ if (!fullpath) {
+ error("cannot find real path for '%s': %m", argv[optind]);
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);
+ error("can't access '%s'", 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;
- }
+ if (by_uuid) {
+ err = btrfs_util_create_subvolume_iterator_fd(fd,
+ BTRFS_FS_TREE_OBJECTID,
+ 0, &iter);
+ if (err) {
+ error_btrfs_util(err);
+ goto out;
+ }
- mntfd = open_file_or_dir(mnt, &dirstream2);
- if (mntfd < 0) {
- fprintf(stderr, "ERROR: can't access '%s'\n", mnt);
- goto out;
- }
+ for (;;) {
+ err = btrfs_util_subvolume_iterator_next_info(iter,
+ &subvol_path,
+ &subvol);
+ if (err == BTRFS_UTIL_ERROR_STOP_ITERATION) {
+ uuid_unparse(uuid_arg, uuidparse);
+ error("can't find uuid '%s' on '%s'", uuidparse,
+ fullpath);
+ btrfs_util_destroy_subvolume_iterator(iter);
+ goto out;
+ } else if (err) {
+ error_btrfs_util(err);
+ btrfs_util_destroy_subvolume_iterator(iter);
+ goto out;
+ }
- if (sv_id == BTRFS_FS_TREE_OBJECTID) {
- printf("%s is btrfs root\n", fullpath);
- goto out;
- }
+ if (uuid_compare(subvol.uuid, uuid_arg) == 0)
+ break;
- memset(&get_ri, 0, sizeof(get_ri));
- get_ri.root_id = sv_id;
+ free(subvol_path);
+ }
+ btrfs_util_destroy_subvolume_iterator(iter);
+ } else {
+ /*
+ * If !by_rootid, rootid_arg = 0, which means find the
+ * subvolume ID of the fd and use that.
+ */
+ err = btrfs_util_subvolume_info_fd(fd, rootid_arg, &subvol);
+ if (err) {
+ error_btrfs_util(err);
+ goto out;
+ }
+
+ err = btrfs_util_subvolume_path_fd(fd, subvol.id, &subvol_path);
+ if (err) {
+ error_btrfs_util(err);
+ goto out;
+ }
- ret = btrfs_get_subvol(mntfd, &get_ri);
- if (ret) {
- fprintf(stderr, "ERROR: can't find '%s'\n",
- svpath);
- goto out;
}
/* print the info */
- printf("%s\n", fullpath);
- printf("\tName: \t\t\t%s\n", get_ri.name);
+ printf("%s\n", subvol.id == BTRFS_FS_TREE_OBJECTID ? "/" : subvol_path);
+ printf("\tName: \t\t\t%s\n",
+ (subvol.id == BTRFS_FS_TREE_OBJECTID ? "<FS_TREE>" :
+ basename(subvol_path)));
- if (uuid_is_null(get_ri.uuid))
+ if (uuid_is_null(subvol.uuid))
strcpy(uuidparse, "-");
else
- uuid_unparse(get_ri.uuid, uuidparse);
+ uuid_unparse(subvol.uuid, uuidparse);
printf("\tUUID: \t\t\t%s\n", uuidparse);
- if (uuid_is_null(get_ri.puuid))
+ if (uuid_is_null(subvol.parent_uuid))
strcpy(uuidparse, "-");
else
- uuid_unparse(get_ri.puuid, uuidparse);
+ uuid_unparse(subvol.parent_uuid, uuidparse);
printf("\tParent UUID: \t\t%s\n", uuidparse);
- if (uuid_is_null(get_ri.ruuid))
+ if (uuid_is_null(subvol.received_uuid))
strcpy(uuidparse, "-");
else
- uuid_unparse(get_ri.ruuid, uuidparse);
+ uuid_unparse(subvol.received_uuid, uuidparse);
printf("\tReceived UUID: \t\t%s\n", uuidparse);
- if (get_ri.otime) {
+ if (subvol.otime.tv_sec) {
struct tm tm;
- localtime_r(&get_ri.otime, &tm);
+ localtime_r(&subvol.otime.tv_sec, &tm);
strftime(tstr, 256, "%Y-%m-%d %X %z", &tm);
} else
strcpy(tstr, "-");
printf("\tCreation time: \t\t%s\n", tstr);
- printf("\tSubvolume ID: \t\t%llu\n", get_ri.root_id);
- printf("\tGeneration: \t\t%llu\n", get_ri.gen);
- printf("\tGen at creation: \t%llu\n", get_ri.ogen);
- printf("\tParent ID: \t\t%llu\n", get_ri.ref_tree);
- printf("\tTop level ID: \t\t%llu\n", get_ri.top_id);
+ printf("\tSubvolume ID: \t\t%" PRIu64 "\n", subvol.id);
+ printf("\tGeneration: \t\t%" PRIu64 "\n", subvol.generation);
+ printf("\tGen at creation: \t%" PRIu64 "\n", subvol.otransid);
+ printf("\tParent ID: \t\t%" PRIu64 "\n", subvol.parent_id);
+ printf("\tTop level ID: \t\t%" PRIu64 "\n", subvol.parent_id);
- if (get_ri.flags & BTRFS_ROOT_SUBVOL_RDONLY)
+ if (subvol.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);
+ err = btrfs_util_create_subvolume_iterator_fd(fd,
+ BTRFS_FS_TREE_OBJECTID, 0,
+ &iter);
+
+ for (;;) {
+ struct btrfs_util_subvolume_info subvol2;
+ char *path;
+ err = btrfs_util_subvolume_iterator_next_info(iter, &path, &subvol2);
+ if (err == BTRFS_UTIL_ERROR_STOP_ITERATION) {
+ break;
+ } else if (err) {
+ error_btrfs_util(err);
+ btrfs_util_destroy_subvolume_iterator(iter);
+ goto out;
+ }
+
+ if (uuid_compare(subvol2.parent_uuid, subvol.uuid) == 0)
+ printf("\t\t\t\t%s\n", path);
+
+ free(path);
+ }
+ btrfs_util_destroy_subvolume_iterator(iter);
+
+ ret = 0;
out:
+ free(subvol_path);
close_file_or_dir(fd, dirstream1);
- close_file_or_dir(mntfd, dirstream2);
- free(mnt);
free(fullpath);
return !!ret;
}
NULL
};
-#if 0
-/*
- * If we're looking for any dead subvolume, take a shortcut and look
- * for any ORPHAN_ITEMs in the tree root
- */
-static int fs_has_dead_subvolumes(int fd)
-{
- int ret;
- struct btrfs_ioctl_search_args args;
- struct btrfs_ioctl_search_key *sk = &args.key;
- struct btrfs_ioctl_search_header sh;
- u64 min_subvolid = 0;
-
-again:
- sk->tree_id = BTRFS_ROOT_TREE_OBJECTID;
- sk->min_objectid = BTRFS_ORPHAN_OBJECTID;
- sk->max_objectid = BTRFS_ORPHAN_OBJECTID;
- sk->min_type = BTRFS_ORPHAN_ITEM_KEY;
- sk->max_type = BTRFS_ORPHAN_ITEM_KEY;
- sk->min_offset = min_subvolid;
- sk->max_offset = (u64)-1;
- sk->min_transid = 0;
- sk->max_transid = (u64)-1;
- sk->nr_items = 1;
-
- ret = ioctl(fd, BTRFS_IOC_TREE_SEARCH, &args);
- if (ret < 0)
- return -errno;
-
- if (!sk->nr_items)
- return 0;
-
- memcpy(&sh, args.buf, sizeof(sh));
- min_subvolid = sh.offset;
-
- /*
- * Verify that the root item is really there and we haven't hit
- * a stale orphan
- */
- sk->tree_id = BTRFS_ROOT_TREE_OBJECTID;
- sk->min_objectid = min_subvolid;
- sk->max_objectid = min_subvolid;
- sk->min_type = BTRFS_ROOT_ITEM_KEY;
- sk->max_type = BTRFS_ROOT_ITEM_KEY;
- sk->min_offset = 0;
- sk->max_offset = (u64)-1;
- sk->min_transid = 0;
- sk->max_transid = (u64)-1;
- sk->nr_items = 1;
-
- ret = ioctl(fd, BTRFS_IOC_TREE_SEARCH, &args);
- if (ret < 0)
- return -errno;
-
- /*
- * Stale orphan, try the next one
- */
- if (!sk->nr_items) {
- min_subvolid++;
- goto again;
- }
-
- return 1;
-}
-#endif
-
-#define SUBVOL_ID_BATCH 1024
-
-/*
- * Enumerate all dead subvolumes that exist in the filesystem.
- * Fill @ids and reallocate to bigger size if needed.
- */
-static int enumerate_dead_subvols(int fd, u64 **ids)
-{
- int ret;
- struct btrfs_ioctl_search_args args;
- struct btrfs_ioctl_search_key *sk = &args.key;
- int idx = 0;
- int count = 0;
-
- memset(&args, 0, sizeof(args));
-
- sk->tree_id = BTRFS_ROOT_TREE_OBJECTID;
- sk->min_objectid = BTRFS_ORPHAN_OBJECTID;
- sk->max_objectid = BTRFS_ORPHAN_OBJECTID;
- sk->min_type = BTRFS_ORPHAN_ITEM_KEY;
- sk->max_type = BTRFS_ORPHAN_ITEM_KEY;
- sk->min_offset = 0;
- sk->max_offset = (u64)-1;
- sk->min_transid = 0;
- sk->max_transid = (u64)-1;
- sk->nr_items = 4096;
-
- *ids = NULL;
- while (1) {
- struct btrfs_ioctl_search_header *sh;
- unsigned long off;
- int i;
-
- ret = ioctl(fd, BTRFS_IOC_TREE_SEARCH, &args);
- if (ret < 0)
- return -errno;
-
- if (!sk->nr_items)
- return idx;
-
- off = 0;
- for (i = 0; i < sk->nr_items; i++) {
- sh = (struct btrfs_ioctl_search_header*)(args.buf + off);
- off += sizeof(*sh);
-
- if (sh->type == BTRFS_ORPHAN_ITEM_KEY) {
- if (idx >= count) {
- u64 *newids;
-
- count += SUBVOL_ID_BATCH;
- newids = (u64*)realloc(*ids, count);
- if (!newids)
- return -ENOMEM;
- *ids = newids;
- }
- (*ids)[idx] = sh->offset;
- idx++;
- }
- off += sh->len;
-
- sk->min_objectid = sh->objectid;
- sk->min_type = sh->type;
- sk->min_offset = sh->offset;
- }
- if (sk->min_offset < (u64)-1)
- sk->min_offset++;
- else
- break;
- if (sk->min_type != BTRFS_ORPHAN_ITEM_KEY)
- break;
- if (sk->min_objectid != BTRFS_ORPHAN_OBJECTID)
- break;
- }
-
- return idx;
-}
-
static int cmd_subvol_sync(int argc, char **argv)
{
int fd = -1;
- int i;
int ret = 1;
DIR *dirstream = NULL;
- u64 *ids = NULL;
- int id_count;
+ uint64_t *ids = NULL;
+ size_t id_count, i;
int sleep_interval = 1;
+ enum btrfs_util_error err;
- optind = 1;
while (1) {
int c = getopt(argc, argv, "s:");
switch (c) {
case 's':
- sleep_interval = atoi(argv[optind]);
+ sleep_interval = atoi(optarg);
if (sleep_interval < 1) {
- fprintf(stderr,
- "ERROR: invalid sleep interval %s\n",
- argv[optind]);
+ error("invalid sleep interval %s", optarg);
ret = 1;
goto out;
}
if (check_argc_min(argc - optind, 1))
usage(cmd_subvol_sync_usage);
- fd = open_file_or_dir(argv[optind], &dirstream);
+ fd = btrfs_open_dir(argv[optind], &dirstream, 1);
if (fd < 0) {
- fprintf(stderr, "ERROR: can't access '%s'\n", argv[optind]);
ret = 1;
goto out;
}
id_count = argc - optind;
if (!id_count) {
- id_count = enumerate_dead_subvols(fd, &ids);
- if (id_count < 0) {
- fprintf(stderr, "ERROR: can't enumerate dead subvolumes: %s\n",
- strerror(-id_count));
+ err = btrfs_util_deleted_subvolumes_fd(fd, &ids, &id_count);
+ if (err) {
+ error_btrfs_util(err);
ret = 1;
goto out;
}
goto out;
}
} else {
- ids = (u64*)malloc(id_count * sizeof(u64));
+ ids = malloc(id_count * sizeof(uint64_t));
if (!ids) {
- fprintf(stderr, "ERROR: not enough memory\n");
+ error("not enough memory");
ret = 1;
goto out;
}
arg = argv[optind + i];
errno = 0;
id = strtoull(arg, NULL, 10);
- if (errno < 0) {
- fprintf(stderr,
- "ERROR: unrecognized subvolume id %s\n",
- arg);
+ if (errno) {
+ error("unrecognized subvolume id %s", arg);
ret = 1;
goto out;
}
- if (id < BTRFS_FIRST_FREE_OBJECTID
- || id > BTRFS_LAST_FREE_OBJECTID) {
- fprintf(stderr,
- "ERROR: subvolume id %s out of range\n",
- arg);
+ if (id < BTRFS_FIRST_FREE_OBJECTID ||
+ id > BTRFS_LAST_FREE_OBJECTID) {
+ error("subvolume id %s out of range", arg);
ret = 1;
goto out;
}
projects / platform / upstream / btrfs-progs.git / blobdiff