mirror of
https://github.com/libguestfs/libguestfs.git
synced 2026-03-21 22:53:37 +00:00
62c5b6db58
Apparently e2fsprogs only knows that "/dev/sda" is a whole device, but doesn't think that "/dev/vda" is. On switching the default device over to virtio-scsi, that causes mke2fs without -F option to complain and ask for an interactive prompt. Adding -F forces it to go ahead anyway. This caused several less-used APIs to break with virtio-scsi.
889 lines
19 KiB
C
889 lines
19 KiB
C
/* libguestfs - the guestfsd daemon
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* Copyright (C) 2009-2012 Red Hat Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include <config.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <inttypes.h>
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#include <string.h>
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#include <unistd.h>
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#include "guestfs_protocol.h"
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#include "daemon.h"
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#include "c-ctype.h"
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#include "actions.h"
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#define MAX_ARGS 64
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/* Choose which tools like mke2fs to use. For RHEL 5 (only) there
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* is a special set of tools which support ext2/3/4. eg. On RHEL 5,
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* mke2fs only supports ext2/3, but mke4fs supports ext2/3/4.
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*
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* We specify e4fsprogs in the package list to ensure it is loaded
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* if it exists.
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*/
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int
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e2prog (char *name)
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{
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char *p = strstr (name, "e2");
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if (!p) return 0;
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p++;
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*p = '4';
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if (prog_exists (name))
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return 0;
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*p = '2';
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if (prog_exists (name))
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return 0;
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reply_with_error ("cannot find required program %s", name);
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return -1;
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}
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char **
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do_tune2fs_l (const char *device)
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{
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int r;
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char *out, *err;
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char *p, *pend, *colon;
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DECLARE_STRINGSBUF (ret);
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char prog[] = "tune2fs";
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if (e2prog (prog) == -1)
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return NULL;
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r = command (&out, &err, prog, "-l", device, NULL);
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if (r == -1) {
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reply_with_error ("%s", err);
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free (err);
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free (out);
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return NULL;
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}
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free (err);
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p = out;
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/* Discard the first line if it contains "tune2fs ...". */
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if (STRPREFIX (p, "tune2fs ") || STRPREFIX (p, "tune4fs ")) {
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p = strchr (p, '\n');
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if (p) p++;
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else {
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reply_with_error ("truncated output");
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free (out);
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return NULL;
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}
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}
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/* Read the lines and split into "key: value". */
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while (*p) {
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pend = strchrnul (p, '\n');
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if (*pend == '\n') {
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*pend = '\0';
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pend++;
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}
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if (!*p) continue;
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colon = strchr (p, ':');
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if (colon) {
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*colon = '\0';
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do { colon++; } while (*colon && c_isspace (*colon));
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if (add_string (&ret, p) == -1) {
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free (out);
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return NULL;
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}
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if (STREQ (colon, "<none>") ||
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STREQ (colon, "<not available>") ||
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STREQ (colon, "(none)")) {
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if (add_string (&ret, "") == -1) {
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free (out);
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return NULL;
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}
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} else {
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if (add_string (&ret, colon) == -1) {
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free (out);
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return NULL;
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}
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}
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}
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else {
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if (add_string (&ret, p) == -1) {
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free (out);
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return NULL;
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}
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if (add_string (&ret, "") == -1) {
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free (out);
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return NULL;
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}
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}
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p = pend;
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}
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free (out);
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if (end_stringsbuf (&ret) == -1)
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return NULL;
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return ret.argv;
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}
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int
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do_set_e2label (const char *device, const char *label)
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{
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return do_set_label (device, label);
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}
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char *
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do_get_e2label (const char *device)
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{
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return do_vfs_label (device);
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}
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int
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do_set_e2uuid (const char *device, const char *uuid)
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{
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int r;
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char *err;
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char prog[] = "tune2fs";
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if (e2prog (prog) == -1)
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return -1;
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r = command (NULL, &err, prog, "-U", uuid, device, NULL);
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if (r == -1) {
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reply_with_error ("%s", err);
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free (err);
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return -1;
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}
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free (err);
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return 0;
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}
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char *
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do_get_e2uuid (const char *device)
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{
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return do_vfs_uuid (device);
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}
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/* If the filesystem is not mounted, run e2fsck -f on it unconditionally. */
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static int
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if_not_mounted_run_e2fsck (const char *device)
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{
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char *err;
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int r, mounted;
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char prog[] = "e2fsck";
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if (e2prog (prog) == -1)
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return -1;
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mounted = is_device_mounted (device);
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if (mounted == -1)
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return -1;
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if (!mounted) {
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r = command (NULL, &err, prog, "-fy", device, NULL);
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if (r == -1) {
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reply_with_error ("%s", err);
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free (err);
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return -1;
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}
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free (err);
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}
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return 0;
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}
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int
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do_resize2fs (const char *device)
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{
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char *err;
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int r;
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char prog[] = "resize2fs";
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if (e2prog (prog) == -1)
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return -1;
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if (if_not_mounted_run_e2fsck (device) == -1)
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return -1;
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r = command (NULL, &err, prog, device, NULL);
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if (r == -1) {
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reply_with_error ("%s", err);
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free (err);
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return -1;
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}
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free (err);
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return 0;
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}
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int
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do_resize2fs_size (const char *device, int64_t size)
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{
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char *err;
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int r;
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char prog[] = "resize2fs";
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if (e2prog (prog) == -1)
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return -1;
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/* resize2fs itself may impose additional limits. Since we are
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* going to use the 'K' suffix however we can only work with whole
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* kilobytes.
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*/
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if (size & 1023) {
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reply_with_error ("%" PRIi64 ": size must be a round number of kilobytes",
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size);
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return -1;
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}
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size /= 1024;
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if (if_not_mounted_run_e2fsck (device) == -1)
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return -1;
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char buf[32];
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snprintf (buf, sizeof buf, "%" PRIi64 "K", size);
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r = command (NULL, &err, prog, device, buf, NULL);
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if (r == -1) {
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reply_with_error ("%s", err);
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free (err);
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return -1;
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}
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free (err);
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return 0;
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}
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int
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do_resize2fs_M (const char *device)
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{
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char *err;
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int r;
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char prog[] = "resize2fs";
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if (e2prog (prog) == -1)
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return -1;
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if (if_not_mounted_run_e2fsck (device) == -1)
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return -1;
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r = command (NULL, &err, prog, "-M", device, NULL);
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if (r == -1) {
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reply_with_error ("%s", err);
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free (err);
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return -1;
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}
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free (err);
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return 0;
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}
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/* Takes optional arguments, consult optargs_bitmask. */
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int
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do_e2fsck (const char *device,
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int correct,
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int forceall)
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{
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const char *argv[MAX_ARGS];
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char *err;
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size_t i = 0;
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int r;
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char prog[] = "e2fsck";
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if (e2prog (prog) == -1)
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return -1;
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/* Default if not selected. */
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if (!(optargs_bitmask & GUESTFS_E2FSCK_CORRECT_BITMASK))
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correct = 0;
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if (!(optargs_bitmask & GUESTFS_E2FSCK_FORCEALL_BITMASK))
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forceall = 0;
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if (correct && forceall) {
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reply_with_error ("only one of the options 'correct', 'forceall' may be specified");
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return -1;
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}
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ADD_ARG (argv, i, prog);
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ADD_ARG (argv, i, "-f");
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if (correct)
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ADD_ARG (argv, i, "-p");
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if (forceall)
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ADD_ARG (argv, i, "-y");
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ADD_ARG (argv, i, device);
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ADD_ARG (argv, i, NULL);
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r = commandv (NULL, &err, argv);
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/* 0 = no errors, 1 = errors corrected.
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*
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* >= 4 means uncorrected or other errors.
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*
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* 2, 3 means errors were corrected and we require a reboot. This is
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* a difficult corner case.
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*/
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if (r == -1 || r >= 2) {
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reply_with_error ("%s", err);
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free (err);
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return -1;
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}
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free (err);
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return 0;
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}
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int
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do_e2fsck_f (const char *device)
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{
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optargs_bitmask = GUESTFS_E2FSCK_CORRECT_BITMASK;
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return do_e2fsck (device, 1, 0);
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}
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int
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do_mke2journal (int blocksize, const char *device)
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{
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char *err;
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int r;
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char prog[] = "mke2fs";
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if (e2prog (prog) == -1)
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return -1;
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char blocksize_s[32];
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snprintf (blocksize_s, sizeof blocksize_s, "%d", blocksize);
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r = command (NULL, &err,
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prog, "-F", "-O", "journal_dev", "-b", blocksize_s,
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device, NULL);
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if (r == -1) {
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reply_with_error ("%s", err);
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free (err);
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return -1;
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}
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free (err);
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return 0;
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}
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int
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do_mke2journal_L (int blocksize, const char *label, const char *device)
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{
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char *err;
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int r;
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char prog[] = "mke2fs";
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if (e2prog (prog) == -1)
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return -1;
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if (strlen (label) > EXT2_LABEL_MAX) {
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reply_with_error ("%s: ext2 labels are limited to %d bytes",
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label, EXT2_LABEL_MAX);
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return -1;
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}
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char blocksize_s[32];
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snprintf (blocksize_s, sizeof blocksize_s, "%d", blocksize);
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r = command (NULL, &err,
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prog, "-F", "-O", "journal_dev", "-b", blocksize_s,
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"-L", label,
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device, NULL);
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if (r == -1) {
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reply_with_error ("%s", err);
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free (err);
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return -1;
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}
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free (err);
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return 0;
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}
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int
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do_mke2journal_U (int blocksize, const char *uuid, const char *device)
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{
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char *err;
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int r;
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char prog[] = "mke2fs";
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if (e2prog (prog) == -1)
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return -1;
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char blocksize_s[32];
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snprintf (blocksize_s, sizeof blocksize_s, "%d", blocksize);
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r = command (NULL, &err,
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prog, "-F", "-O", "journal_dev", "-b", blocksize_s,
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"-U", uuid,
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device, NULL);
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if (r == -1) {
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reply_with_error ("%s", err);
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free (err);
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return -1;
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}
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free (err);
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return 0;
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}
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int
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do_mke2fs_J (const char *fstype, int blocksize, const char *device,
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const char *journal)
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{
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char *err;
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int r;
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char prog[] = "mke2fs";
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if (e2prog (prog) == -1)
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return -1;
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char blocksize_s[32];
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snprintf (blocksize_s, sizeof blocksize_s, "%d", blocksize);
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size_t len = strlen (journal);
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char jdev[len+32];
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snprintf (jdev, len+32, "device=%s", journal);
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r = command (NULL, &err,
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prog, "-F", "-t", fstype, "-J", jdev, "-b", blocksize_s,
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device, NULL);
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if (r == -1) {
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reply_with_error ("%s", err);
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free (err);
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return -1;
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}
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free (err);
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return 0;
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}
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int
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do_mke2fs_JL (const char *fstype, int blocksize, const char *device,
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const char *label)
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{
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char *err;
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int r;
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char prog[] = "mke2fs";
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if (e2prog (prog) == -1)
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return -1;
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if (strlen (label) > EXT2_LABEL_MAX) {
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reply_with_error ("%s: ext2 labels are limited to %d bytes",
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label, EXT2_LABEL_MAX);
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return -1;
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}
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char blocksize_s[32];
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snprintf (blocksize_s, sizeof blocksize_s, "%d", blocksize);
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size_t len = strlen (label);
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char jdev[len+32];
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snprintf (jdev, len+32, "device=LABEL=%s", label);
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r = command (NULL, &err,
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prog, "-F", "-t", fstype, "-J", jdev, "-b", blocksize_s,
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device, NULL);
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if (r == -1) {
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reply_with_error ("%s", err);
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free (err);
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return -1;
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}
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free (err);
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return 0;
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}
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int
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do_mke2fs_JU (const char *fstype, int blocksize, const char *device,
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const char *uuid)
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{
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char *err;
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int r;
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char prog[] = "mke2fs";
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if (e2prog (prog) == -1)
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return -1;
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char blocksize_s[32];
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snprintf (blocksize_s, sizeof blocksize_s, "%d", blocksize);
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size_t len = strlen (uuid);
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char jdev[len+32];
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snprintf (jdev, len+32, "device=UUID=%s", uuid);
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r = command (NULL, &err,
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prog, "-F", "-t", fstype, "-J", jdev, "-b", blocksize_s,
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device, NULL);
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if (r == -1) {
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reply_with_error ("%s", err);
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free (err);
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return -1;
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}
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free (err);
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return 0;
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}
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/* Takes optional arguments, consult optargs_bitmask. */
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int
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do_tune2fs (const char *device, /* only required parameter */
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int force,
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int maxmountcount,
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int mountcount,
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const char *errorbehavior,
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int64_t group,
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int intervalbetweenchecks,
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int reservedblockspercentage,
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const char *lastmounteddirectory,
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int64_t reservedblockscount,
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int64_t user)
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{
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const char *argv[MAX_ARGS];
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size_t i = 0;
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int r;
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char *err;
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char prog[] = "tune2fs";
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char maxmountcount_s[64];
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char mountcount_s[64];
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char group_s[64];
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char intervalbetweenchecks_s[64];
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char reservedblockspercentage_s[64];
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char reservedblockscount_s[64];
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char user_s[64];
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if (e2prog (prog) == -1)
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return -1;
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ADD_ARG (argv, i, prog);
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|
|
if (optargs_bitmask & GUESTFS_TUNE2FS_FORCE_BITMASK) {
|
|
if (force)
|
|
ADD_ARG (argv, i, "-f");
|
|
}
|
|
|
|
if (optargs_bitmask & GUESTFS_TUNE2FS_MAXMOUNTCOUNT_BITMASK) {
|
|
if (maxmountcount < 0) {
|
|
reply_with_error ("maxmountcount cannot be negative");
|
|
return -1;
|
|
}
|
|
ADD_ARG (argv, i, "-c");
|
|
snprintf (maxmountcount_s, sizeof maxmountcount_s, "%d", maxmountcount);
|
|
ADD_ARG (argv, i, maxmountcount_s);
|
|
}
|
|
|
|
if (optargs_bitmask & GUESTFS_TUNE2FS_MOUNTCOUNT_BITMASK) {
|
|
if (mountcount < 0) {
|
|
reply_with_error ("mountcount cannot be negative");
|
|
return -1;
|
|
}
|
|
ADD_ARG (argv, i, "-C");
|
|
snprintf (mountcount_s, sizeof mountcount_s, "%d", mountcount);
|
|
ADD_ARG (argv, i, mountcount_s);
|
|
}
|
|
|
|
if (optargs_bitmask & GUESTFS_TUNE2FS_ERRORBEHAVIOR_BITMASK) {
|
|
if (STRNEQ (errorbehavior, "continue") &&
|
|
STRNEQ (errorbehavior, "remount-ro") &&
|
|
STRNEQ (errorbehavior, "panic")) {
|
|
reply_with_error ("invalid errorbehavior parameter: %s", errorbehavior);
|
|
return -1;
|
|
}
|
|
ADD_ARG (argv, i, "-e");
|
|
ADD_ARG (argv, i, errorbehavior);
|
|
}
|
|
|
|
if (optargs_bitmask & GUESTFS_TUNE2FS_GROUP_BITMASK) {
|
|
if (group < 0) {
|
|
reply_with_error ("group cannot be negative");
|
|
return -1;
|
|
}
|
|
ADD_ARG (argv, i, "-g");
|
|
snprintf (group_s, sizeof group_s, "%" PRIi64, group);
|
|
ADD_ARG (argv, i, group_s);
|
|
}
|
|
|
|
if (optargs_bitmask & GUESTFS_TUNE2FS_INTERVALBETWEENCHECKS_BITMASK) {
|
|
if (intervalbetweenchecks < 0) {
|
|
reply_with_error ("intervalbetweenchecks cannot be negative");
|
|
return -1;
|
|
}
|
|
ADD_ARG (argv, i, "-i");
|
|
if (intervalbetweenchecks > 0) {
|
|
/* -i <NN>s is not documented in the man page, but has been
|
|
* supported in tune2fs for several years.
|
|
*/
|
|
snprintf (intervalbetweenchecks_s, sizeof intervalbetweenchecks_s,
|
|
"%ds", intervalbetweenchecks);
|
|
ADD_ARG (argv, i, intervalbetweenchecks_s);
|
|
}
|
|
else
|
|
ADD_ARG (argv, i, "0");
|
|
}
|
|
|
|
if (optargs_bitmask & GUESTFS_TUNE2FS_RESERVEDBLOCKSPERCENTAGE_BITMASK) {
|
|
if (reservedblockspercentage < 0) {
|
|
reply_with_error ("reservedblockspercentage cannot be negative");
|
|
return -1;
|
|
}
|
|
ADD_ARG (argv, i, "-m");
|
|
snprintf (reservedblockspercentage_s, sizeof reservedblockspercentage_s,
|
|
"%d", reservedblockspercentage);
|
|
ADD_ARG (argv, i, reservedblockspercentage_s);
|
|
}
|
|
|
|
if (optargs_bitmask & GUESTFS_TUNE2FS_LASTMOUNTEDDIRECTORY_BITMASK) {
|
|
ADD_ARG (argv, i, "-M");
|
|
ADD_ARG (argv, i, lastmounteddirectory);
|
|
}
|
|
|
|
if (optargs_bitmask & GUESTFS_TUNE2FS_RESERVEDBLOCKSCOUNT_BITMASK) {
|
|
if (reservedblockscount < 0) {
|
|
reply_with_error ("reservedblockscount cannot be negative");
|
|
return -1;
|
|
}
|
|
ADD_ARG (argv, i, "-r");
|
|
snprintf (reservedblockscount_s, sizeof reservedblockscount_s,
|
|
"%" PRIi64, reservedblockscount);
|
|
ADD_ARG (argv, i, reservedblockscount_s);
|
|
}
|
|
|
|
if (optargs_bitmask & GUESTFS_TUNE2FS_USER_BITMASK) {
|
|
if (user < 0) {
|
|
reply_with_error ("user cannot be negative");
|
|
return -1;
|
|
}
|
|
ADD_ARG (argv, i, "-u");
|
|
snprintf (user_s, sizeof user_s, "%" PRIi64, user);
|
|
ADD_ARG (argv, i, user_s);
|
|
}
|
|
|
|
ADD_ARG (argv, i, device);
|
|
ADD_ARG (argv, i, NULL);
|
|
|
|
r = commandv (NULL, &err, argv);
|
|
if (r == -1) {
|
|
reply_with_error ("%s: %s: %s", prog, device, err);
|
|
free (err);
|
|
return -1;
|
|
}
|
|
|
|
free (err);
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
compare_chars (const void *vc1, const void *vc2)
|
|
{
|
|
char c1 = * (char *) vc1;
|
|
char c2 = * (char *) vc2;
|
|
return c1 - c2;
|
|
}
|
|
|
|
char *
|
|
do_get_e2attrs (const char *filename)
|
|
{
|
|
int r;
|
|
char *buf;
|
|
char *out, *err;
|
|
size_t i, j;
|
|
|
|
buf = sysroot_path (filename);
|
|
if (!buf) {
|
|
reply_with_perror ("malloc");
|
|
return NULL;
|
|
}
|
|
|
|
r = command (&out, &err, "lsattr", "-d", "--", buf, NULL);
|
|
free (buf);
|
|
if (r == -1) {
|
|
reply_with_error ("%s: %s: %s", "lsattr", filename, err);
|
|
free (err);
|
|
free (out);
|
|
return NULL;
|
|
}
|
|
free (err);
|
|
|
|
/* Output looks like:
|
|
* -------------e- filename
|
|
* Remove the dashes and return everything up to the space.
|
|
*/
|
|
for (i = j = 0; out[j] != ' '; j++) {
|
|
if (out[j] != '-')
|
|
out[i++] = out[j];
|
|
}
|
|
|
|
out[i] = '\0';
|
|
|
|
/* Sort the output, mainly to make testing simpler. */
|
|
qsort (out, i, sizeof (char), compare_chars);
|
|
|
|
return out;
|
|
}
|
|
|
|
/* Takes optional arguments, consult optargs_bitmask. */
|
|
int
|
|
do_set_e2attrs (const char *filename, const char *attrs, int clear)
|
|
{
|
|
int r;
|
|
char *buf;
|
|
char *err;
|
|
size_t i, j;
|
|
int lowers[26], uppers[26];
|
|
char attr_arg[26*2+1+1]; /* '+'/'-' + attrs + trailing '\0' */
|
|
|
|
if (!(optargs_bitmask & GUESTFS_SET_E2ATTRS_CLEAR_BITMASK))
|
|
attr_arg[0] = '+';
|
|
else if (!clear)
|
|
attr_arg[0] = '+';
|
|
else
|
|
attr_arg[0] = '-';
|
|
j = 1;
|
|
|
|
/* You can't write "chattr - file", so we have to just return if
|
|
* the string is empty.
|
|
*/
|
|
if (STREQ (attrs, ""))
|
|
return 0;
|
|
|
|
/* Valid attrs are all lower or upper case ASCII letters. Check
|
|
* this and that there are no duplicates.
|
|
*/
|
|
memset (lowers, 0, sizeof lowers);
|
|
memset (uppers, 0, sizeof uppers);
|
|
for (; *attrs; attrs++) {
|
|
/* These are reserved by the chattr program for command line flags. */
|
|
if (*attrs == 'R' || *attrs == 'V' || *attrs == 'f' || *attrs == 'v') {
|
|
reply_with_error ("bad file attribute '%c'", *attrs);
|
|
return -1;
|
|
}
|
|
else if (*attrs >= 'a' && *attrs <= 'z') {
|
|
i = *attrs - 'a';
|
|
if (lowers[i] > 0)
|
|
goto error_duplicate;
|
|
lowers[i]++;
|
|
attr_arg[j++] = *attrs;
|
|
}
|
|
else if (*attrs >= 'A' && *attrs <= 'Z') {
|
|
i = *attrs - 'A';
|
|
if (uppers[i] > 0) {
|
|
error_duplicate:
|
|
reply_with_error ("duplicate file attribute '%c'", *attrs);
|
|
return -1;
|
|
}
|
|
uppers[i]++;
|
|
attr_arg[j++] = *attrs;
|
|
}
|
|
else {
|
|
reply_with_error ("unknown file attribute '%c'", *attrs);
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
attr_arg[j] = '\0';
|
|
|
|
buf = sysroot_path (filename);
|
|
if (!buf) {
|
|
reply_with_perror ("malloc");
|
|
return -1;
|
|
}
|
|
|
|
r = command (NULL, &err, "chattr", attr_arg, "--", buf, NULL);
|
|
free (buf);
|
|
if (r == -1) {
|
|
reply_with_error ("%s: %s: %s", "chattr", filename, err);
|
|
free (err);
|
|
return -1;
|
|
}
|
|
free (err);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int64_t
|
|
do_get_e2generation (const char *filename)
|
|
{
|
|
int r;
|
|
char *buf;
|
|
char *out, *err;
|
|
int64_t ret;
|
|
|
|
buf = sysroot_path (filename);
|
|
if (!buf) {
|
|
reply_with_perror ("malloc");
|
|
return -1;
|
|
}
|
|
|
|
r = command (&out, &err, "lsattr", "-dv", "--", buf, NULL);
|
|
free (buf);
|
|
if (r == -1) {
|
|
reply_with_error ("%s: %s: %s", "lsattr", filename, err);
|
|
free (err);
|
|
free (out);
|
|
return -1;
|
|
}
|
|
free (err);
|
|
|
|
if (sscanf (out, "%" SCNu64, &ret) != 1) {
|
|
reply_with_error ("cannot parse output from '%s' command: %s",
|
|
"lsattr", out);
|
|
free (out);
|
|
return -1;
|
|
}
|
|
free (out);
|
|
|
|
return ret;
|
|
}
|
|
|
|
int
|
|
do_set_e2generation (const char *filename, int64_t generation)
|
|
{
|
|
int r;
|
|
char *buf;
|
|
char *err;
|
|
char generation_str[64];
|
|
|
|
buf = sysroot_path (filename);
|
|
if (!buf) {
|
|
reply_with_perror ("malloc");
|
|
return -1;
|
|
}
|
|
|
|
snprintf (generation_str, sizeof generation_str,
|
|
"%" PRIu64, (uint64_t) generation);
|
|
|
|
r = command (NULL, &err, "chattr", "-v", generation_str, "--", buf, NULL);
|
|
free (buf);
|
|
if (r == -1) {
|
|
reply_with_error ("%s: %s: %s", "chattr", filename, err);
|
|
free (err);
|
|
return -1;
|
|
}
|
|
free (err);
|
|
|
|
return 0;
|
|
}
|