blob: 053cf8ea78486cbd4efda92ce70096456a4994cf [file] [log] [blame]
/*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public
* License v2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public
* License along with this program; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 021110-1307, USA.
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <stdint.h>
#include <sys/ioctl.h>
#include <errno.h>
#include "kerncompat.h"
#include "ioctl.h"
#include "utils.h"
#include "ctree.h"
#include "send-utils.h"
#include "commands.h"
#include "btrfs-list.h"
static const char * const inspect_cmd_group_usage[] = {
"btrfs inspect-internal <command> <args>",
NULL
};
static int __ino_to_path_fd(u64 inum, int fd, int verbose, const char *prepend)
{
int ret;
int i;
struct btrfs_ioctl_ino_path_args ipa;
struct btrfs_data_container *fspath;
fspath = malloc(4096);
if (!fspath)
return -ENOMEM;
memset(fspath, 0, sizeof(*fspath));
ipa.inum = inum;
ipa.size = 4096;
ipa.fspath = ptr_to_u64(fspath);
ret = ioctl(fd, BTRFS_IOC_INO_PATHS, &ipa);
if (ret) {
printf("ioctl ret=%d, error: %s\n", ret, strerror(errno));
goto out;
}
if (verbose)
printf("ioctl ret=%d, bytes_left=%lu, bytes_missing=%lu, "
"cnt=%d, missed=%d\n", ret,
(unsigned long)fspath->bytes_left,
(unsigned long)fspath->bytes_missing,
fspath->elem_cnt, fspath->elem_missed);
for (i = 0; i < fspath->elem_cnt; ++i) {
u64 ptr;
char *str;
ptr = (u64)(unsigned long)fspath->val;
ptr += fspath->val[i];
str = (char *)(unsigned long)ptr;
if (prepend)
printf("%s/%s\n", prepend, str);
else
printf("%s\n", str);
}
out:
free(fspath);
return !!ret;
}
static const char * const cmd_inode_resolve_usage[] = {
"btrfs inspect-internal inode-resolve [-v] <inode> <path>",
"Get file system paths for the given inode",
"",
"-v verbose mode",
NULL
};
static int cmd_inode_resolve(int argc, char **argv)
{
int fd;
int verbose = 0;
int ret;
DIR *dirstream = NULL;
optind = 1;
while (1) {
int c = getopt(argc, argv, "v");
if (c < 0)
break;
switch (c) {
case 'v':
verbose = 1;
break;
default:
usage(cmd_inode_resolve_usage);
}
}
if (check_argc_exact(argc - optind, 2))
usage(cmd_inode_resolve_usage);
fd = open_file_or_dir(argv[optind+1], &dirstream);
if (fd < 0) {
fprintf(stderr, "ERROR: can't access '%s'\n", argv[optind+1]);
return 1;
}
ret = __ino_to_path_fd(arg_strtou64(argv[optind]), fd, verbose,
argv[optind+1]);
close_file_or_dir(fd, dirstream);
return !!ret;
}
static const char * const cmd_logical_resolve_usage[] = {
"btrfs inspect-internal logical-resolve [-Pv] [-s bufsize] <logical> <path>",
"Get file system paths for the given logical address",
"-P skip the path resolving and print the inodes instead",
"-v verbose mode",
"-s bufsize set inode container's size. This is used to increase inode",
" container's size in case it is not enough to read all the ",
" resolved results. The max value one can set is 64k",
NULL
};
static int cmd_logical_resolve(int argc, char **argv)
{
int ret;
int fd;
int i;
int verbose = 0;
int getpath = 1;
int bytes_left;
struct btrfs_ioctl_logical_ino_args loi;
struct btrfs_data_container *inodes;
u64 size = 4096;
char full_path[4096];
char *path_ptr;
DIR *dirstream = NULL;
optind = 1;
while (1) {
int c = getopt(argc, argv, "Pvs:");
if (c < 0)
break;
switch (c) {
case 'P':
getpath = 0;
break;
case 'v':
verbose = 1;
break;
case 's':
size = arg_strtou64(optarg);
break;
default:
usage(cmd_logical_resolve_usage);
}
}
if (check_argc_exact(argc - optind, 2))
usage(cmd_logical_resolve_usage);
size = min(size, (u64)64 * 1024);
inodes = malloc(size);
if (!inodes)
return 1;
memset(inodes, 0, sizeof(*inodes));
loi.logical = arg_strtou64(argv[optind]);
loi.size = size;
loi.inodes = ptr_to_u64(inodes);
fd = open_file_or_dir(argv[optind+1], &dirstream);
if (fd < 0) {
fprintf(stderr, "ERROR: can't access '%s'\n", argv[optind+1]);
ret = 12;
goto out;
}
ret = ioctl(fd, BTRFS_IOC_LOGICAL_INO, &loi);
if (ret) {
printf("ioctl ret=%d, error: %s\n", ret, strerror(errno));
goto out;
}
if (verbose)
printf("ioctl ret=%d, total_size=%llu, bytes_left=%lu, "
"bytes_missing=%lu, cnt=%d, missed=%d\n",
ret, size,
(unsigned long)inodes->bytes_left,
(unsigned long)inodes->bytes_missing,
inodes->elem_cnt, inodes->elem_missed);
bytes_left = sizeof(full_path);
ret = snprintf(full_path, bytes_left, "%s/", argv[optind+1]);
path_ptr = full_path + ret;
bytes_left -= ret + 1;
BUG_ON(bytes_left < 0);
for (i = 0; i < inodes->elem_cnt; i += 3) {
u64 inum = inodes->val[i];
u64 offset = inodes->val[i+1];
u64 root = inodes->val[i+2];
int path_fd;
char *name;
DIR *dirs = NULL;
if (getpath) {
name = btrfs_list_path_for_root(fd, root);
if (IS_ERR(name)) {
ret = PTR_ERR(name);
goto out;
}
if (!name) {
path_ptr[-1] = '\0';
path_fd = fd;
} else {
path_ptr[-1] = '/';
ret = snprintf(path_ptr, bytes_left, "%s",
name);
BUG_ON(ret >= bytes_left);
free(name);
path_fd = open_file_or_dir(full_path, &dirs);
if (path_fd < 0) {
fprintf(stderr, "ERROR: can't access "
"'%s'\n", full_path);
goto out;
}
}
__ino_to_path_fd(inum, path_fd, verbose, full_path);
if (path_fd != fd)
close_file_or_dir(path_fd, dirs);
} else {
printf("inode %llu offset %llu root %llu\n", inum,
offset, root);
}
}
out:
close_file_or_dir(fd, dirstream);
free(inodes);
return !!ret;
}
static const char * const cmd_subvolid_resolve_usage[] = {
"btrfs inspect-internal subvolid-resolve <subvolid> <path>",
"Get file system paths for the given subvolume ID.",
NULL
};
static int cmd_subvolid_resolve(int argc, char **argv)
{
int ret;
int fd = -1;
u64 subvol_id;
char path[PATH_MAX];
DIR *dirstream = NULL;
if (check_argc_exact(argc, 3))
usage(cmd_subvolid_resolve_usage);
fd = open_file_or_dir(argv[2], &dirstream);
if (fd < 0) {
fprintf(stderr, "ERROR: can't access '%s'\n", argv[2]);
ret = -ENOENT;
goto out;
}
subvol_id = arg_strtou64(argv[1]);
ret = btrfs_subvolid_resolve(fd, path, sizeof(path), subvol_id);
if (ret) {
fprintf(stderr,
"%s: btrfs_subvolid_resolve(subvol_id %llu) failed with ret=%d\n",
argv[0], (unsigned long long)subvol_id, ret);
goto out;
}
path[PATH_MAX] = '\0';
printf("%s\n", path);
out:
close_file_or_dir(fd, dirstream);
return ret ? 1 : 0;
}
static const char* const cmd_rootid_usage[] = {
"btrfs inspect-internal rootid <path>",
"Get tree ID of the containing subvolume of path.",
NULL
};
static int cmd_rootid(int argc, char **argv)
{
int ret;
int fd = -1;
u64 rootid;
DIR *dirstream = NULL;
if (check_argc_exact(argc, 2))
usage(cmd_rootid_usage);
fd = open_file_or_dir(argv[1], &dirstream);
if (fd < 0) {
fprintf(stderr, "ERROR: can't access '%s'\n", argv[1]);
ret = -ENOENT;
goto out;
}
ret = lookup_ino_rootid(fd, &rootid);
if (ret) {
fprintf(stderr, "%s: rootid failed with ret=%d\n",
argv[0], ret);
goto out;
}
printf("%llu\n", (unsigned long long)rootid);
out:
close_file_or_dir(fd, dirstream);
return !!ret;
}
static const char inspect_cmd_group_info[] =
"query various internal information";
const struct cmd_group inspect_cmd_group = {
inspect_cmd_group_usage, inspect_cmd_group_info, {
{ "inode-resolve", cmd_inode_resolve, cmd_inode_resolve_usage,
NULL, 0 },
{ "logical-resolve", cmd_logical_resolve,
cmd_logical_resolve_usage, NULL, 0 },
{ "subvolid-resolve", cmd_subvolid_resolve,
cmd_subvolid_resolve_usage, NULL, 0 },
{ "rootid", cmd_rootid, cmd_rootid_usage, NULL, 0 },
NULL_CMD_STRUCT
}
};
int cmd_inspect(int argc, char **argv)
{
return handle_command_group(&inspect_cmd_group, argc, argv);
}