1292 lines
33 KiB
C
1292 lines
33 KiB
C
/*
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* mdadm - manage Linux "md" devices aka RAID arrays.
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*
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* Copyright (C) 2001-2009 Neil Brown <neilb@suse.de>
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*
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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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* Author: Neil Brown
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* Email: <neilb@suse.de>
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*/
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#include "mdadm.h"
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#include "md_u.h"
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#include "md_p.h"
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#include <ctype.h>
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#define REGISTER_DEV _IO (MD_MAJOR, 1)
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#define START_MD _IO (MD_MAJOR, 2)
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#define STOP_MD _IO (MD_MAJOR, 3)
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int Manage_ro(char *devname, int fd, int readonly)
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{
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/* switch to readonly or rw
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*
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* requires >= 0.90.0
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* first check that array is runing
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* use RESTART_ARRAY_RW or STOP_ARRAY_RO
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*
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*/
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mdu_array_info_t array;
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#ifndef MDASSEMBLE
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struct mdinfo *mdi;
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#endif
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int rv = 0;
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if (md_get_version(fd) < 9000) {
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fprintf(stderr, Name ": need md driver version 0.90.0 or later\n");
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return 1;
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}
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#ifndef MDASSEMBLE
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/* If this is an externally-manage array, we need to modify the
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* metadata_version so that mdmon doesn't undo our change.
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*/
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mdi = sysfs_read(fd, -1, GET_LEVEL|GET_VERSION);
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if (mdi &&
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mdi->array.major_version == -1 &&
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is_subarray(mdi->text_version)) {
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char vers[64];
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strcpy(vers, "external:");
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strcat(vers, mdi->text_version);
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if (readonly > 0) {
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int rv;
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/* We set readonly ourselves. */
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vers[9] = '-';
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sysfs_set_str(mdi, NULL, "metadata_version", vers);
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close(fd);
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rv = sysfs_set_str(mdi, NULL, "array_state", "readonly");
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if (rv < 0) {
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fprintf(stderr, Name ": failed to set readonly for %s: %s\n",
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devname, strerror(errno));
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vers[9] = mdi->text_version[0];
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sysfs_set_str(mdi, NULL, "metadata_version", vers);
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rv = 1;
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goto out;
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}
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} else {
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char *cp;
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/* We cannot set read/write - must signal mdmon */
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vers[9] = '/';
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sysfs_set_str(mdi, NULL, "metadata_version", vers);
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cp = strchr(vers+10, '/');
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if (cp)
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*cp = 0;
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ping_monitor(vers+10);
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if (mdi->array.level <= 0)
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sysfs_set_str(mdi, NULL, "array_state", "active");
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}
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goto out;
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}
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#endif
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if (ioctl(fd, GET_ARRAY_INFO, &array)) {
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fprintf(stderr, Name ": %s does not appear to be active.\n",
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devname);
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rv = 1;
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goto out;
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}
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if (readonly>0) {
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if (ioctl(fd, STOP_ARRAY_RO, NULL)) {
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fprintf(stderr, Name ": failed to set readonly for %s: %s\n",
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devname, strerror(errno));
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rv = 1;
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goto out;
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}
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} else if (readonly < 0) {
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if (ioctl(fd, RESTART_ARRAY_RW, NULL)) {
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fprintf(stderr, Name ": failed to set writable for %s: %s\n",
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devname, strerror(errno));
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rv = 1;
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goto out;
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}
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}
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out:
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#ifndef MDASSEMBLE
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if (mdi)
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sysfs_free(mdi);
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#endif
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return rv;
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}
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#ifndef MDASSEMBLE
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static void remove_devices(int devnum, char *path)
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{
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/*
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* Remove names at 'path' - possibly with
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* partition suffixes - which link to the 'standard'
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* name for devnum. These were probably created
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* by mdadm when the array was assembled.
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*/
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char base[40];
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char *path2;
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char link[1024];
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int n;
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int part;
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char *be;
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char *pe;
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if (!path)
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return;
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if (devnum >= 0)
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sprintf(base, "/dev/md%d", devnum);
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else
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sprintf(base, "/dev/md_d%d", -1-devnum);
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be = base + strlen(base);
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path2 = malloc(strlen(path)+20);
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strcpy(path2, path);
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pe = path2 + strlen(path2);
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for (part = 0; part < 16; part++) {
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if (part) {
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sprintf(be, "p%d", part);
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if (isdigit(pe[-1]))
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sprintf(pe, "p%d", part);
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else
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sprintf(pe, "%d", part);
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}
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n = readlink(path2, link, sizeof(link));
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if (n > 0 && (int)strlen(base) == n &&
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strncmp(link, base, n) == 0)
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unlink(path2);
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}
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free(path2);
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}
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int Manage_runstop(char *devname, int fd, int runstop, int quiet)
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{
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/* Run or stop the array. array must already be configured
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* required >= 0.90.0
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* Only print failure messages if quiet == 0;
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* quiet > 0 means really be quiet
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* quiet < 0 means we will try again if it fails.
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*/
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mdu_param_t param; /* unused */
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int rv = 0;
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if (runstop == -1 && md_get_version(fd) < 9000) {
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if (ioctl(fd, STOP_MD, 0)) {
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if (quiet == 0) fprintf(stderr,
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Name ": stopping device %s "
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"failed: %s\n",
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devname, strerror(errno));
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return 1;
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}
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}
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if (md_get_version(fd) < 9000) {
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fprintf(stderr, Name ": need md driver version 0.90.0 or later\n");
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return 1;
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}
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/*
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if (ioctl(fd, GET_ARRAY_INFO, &array)) {
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fprintf(stderr, Name ": %s does not appear to be active.\n",
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devname);
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return 1;
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}
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*/
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if (runstop>0) {
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if (ioctl(fd, RUN_ARRAY, ¶m)) {
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fprintf(stderr, Name ": failed to run array %s: %s\n",
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devname, strerror(errno));
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return 1;
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}
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if (quiet <= 0)
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fprintf(stderr, Name ": started %s\n", devname);
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} else if (runstop < 0){
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struct map_ent *map = NULL;
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struct stat stb;
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struct mdinfo *mdi;
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int devnum;
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int err;
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int count;
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/* If this is an mdmon managed array, just write 'inactive'
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* to the array state and let mdmon clear up.
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*/
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devnum = fd2devnum(fd);
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/* Get EXCL access first. If this fails, then attempting
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* to stop is probably a bad idea.
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*/
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close(fd);
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fd = open(devname, O_RDONLY|O_EXCL);
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if (fd < 0 || fd2devnum(fd) != devnum) {
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if (fd >= 0)
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close(fd);
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fprintf(stderr,
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Name ": Cannot get exclusive access to %s:"
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"Perhaps a running "
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"process, mounted filesystem "
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"or active volume group?\n",
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devname);
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return 1;
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}
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mdi = sysfs_read(fd, -1, GET_LEVEL|GET_VERSION);
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if (mdi &&
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mdi->array.level > 0 &&
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is_subarray(mdi->text_version)) {
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int err;
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/* This is mdmon managed. */
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close(fd);
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count = 25;
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while (count &&
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(err = sysfs_set_str(mdi, NULL,
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"array_state",
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"inactive")) < 0
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&& errno == EBUSY) {
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usleep(200000);
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count--;
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}
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if (err && !quiet) {
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fprintf(stderr, Name
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": failed to stop array %s: %s\n",
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devname, strerror(errno));
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rv = 1;
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goto out;
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}
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/* Give monitor a chance to act */
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ping_monitor(mdi->text_version);
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fd = open_dev_excl(devnum);
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if (fd < 0) {
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fprintf(stderr, Name
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": failed to completely stop %s"
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": Device is busy\n",
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devname);
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rv = 1;
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goto out;
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}
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} else if (mdi &&
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mdi->array.major_version == -1 &&
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mdi->array.minor_version == -2 &&
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!is_subarray(mdi->text_version)) {
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struct mdstat_ent *mds, *m;
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/* container, possibly mdmon-managed.
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* Make sure mdmon isn't opening it, which
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* would interfere with the 'stop'
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*/
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ping_monitor(mdi->sys_name);
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|
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/* now check that there are no existing arrays
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* which are members of this array
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*/
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mds = mdstat_read(0, 0);
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for (m=mds; m; m=m->next)
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if (m->metadata_version &&
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strncmp(m->metadata_version, "external:", 9)==0 &&
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is_subarray(m->metadata_version+9) &&
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devname2devnum(m->metadata_version+10) == devnum) {
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if (!quiet)
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fprintf(stderr, Name
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": Cannot stop container %s: "
|
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"member %s still active\n",
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devname, m->dev);
|
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free_mdstat(mds);
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rv = 1;
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goto out;
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}
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}
|
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|
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/* As we have an O_EXCL open, any use of the device
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* which blocks STOP_ARRAY is probably a transient use,
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* so it is reasonable to retry for a while - 5 seconds.
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*/
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count = 25; err = 0;
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while (count && fd >= 0
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&& (err = ioctl(fd, STOP_ARRAY, NULL)) < 0
|
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&& errno == EBUSY) {
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usleep(200000);
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count --;
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}
|
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if (fd >= 0 && err) {
|
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if (quiet == 0) {
|
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fprintf(stderr, Name
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": failed to stop array %s: %s\n",
|
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devname, strerror(errno));
|
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if (errno == EBUSY)
|
|
fprintf(stderr, "Perhaps a running "
|
|
"process, mounted filesystem "
|
|
"or active volume group?\n");
|
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}
|
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rv = 1;
|
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goto out;
|
|
}
|
|
/* prior to 2.6.28, KOBJ_CHANGE was not sent when an md array
|
|
* was stopped, so We'll do it here just to be sure. Drop any
|
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* partitions as well...
|
|
*/
|
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if (fd >= 0)
|
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ioctl(fd, BLKRRPART, 0);
|
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if (mdi)
|
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sysfs_uevent(mdi, "change");
|
|
|
|
|
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if (devnum != NoMdDev &&
|
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(stat("/dev/.udev", &stb) != 0 ||
|
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check_env("MDADM_NO_UDEV"))) {
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struct map_ent *mp = map_by_devnum(&map, devnum);
|
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remove_devices(devnum, mp ? mp->path : NULL);
|
|
}
|
|
|
|
|
|
if (quiet <= 0)
|
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fprintf(stderr, Name ": stopped %s\n", devname);
|
|
map_lock(&map);
|
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map_remove(&map, devnum);
|
|
map_unlock(&map);
|
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out:
|
|
if (mdi)
|
|
sysfs_free(mdi);
|
|
}
|
|
return rv;
|
|
}
|
|
|
|
int Manage_resize(char *devname, int fd, long long size, int raid_disks)
|
|
{
|
|
mdu_array_info_t info;
|
|
if (ioctl(fd, GET_ARRAY_INFO, &info) != 0) {
|
|
fprintf(stderr, Name ": Cannot get array information for %s: %s\n",
|
|
devname, strerror(errno));
|
|
return 1;
|
|
}
|
|
if (size >= 0)
|
|
info.size = size;
|
|
if (raid_disks > 0)
|
|
info.raid_disks = raid_disks;
|
|
if (ioctl(fd, SET_ARRAY_INFO, &info) != 0) {
|
|
fprintf(stderr, Name ": Cannot set device size/shape for %s: %s\n",
|
|
devname, strerror(errno));
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int Manage_subdevs(char *devname, int fd,
|
|
struct mddev_dev *devlist, int verbose, int test,
|
|
char *update, int force)
|
|
{
|
|
/* do something to each dev.
|
|
* devmode can be
|
|
* 'a' - add the device
|
|
* try HOT_ADD_DISK
|
|
* If that fails EINVAL, try ADD_NEW_DISK
|
|
* 'r' - remove the device HOT_REMOVE_DISK
|
|
* device can be 'faulty' or 'detached' in which case all
|
|
* matching devices are removed.
|
|
* 'f' - set the device faulty SET_DISK_FAULTY
|
|
* device can be 'detached' in which case any device that
|
|
* is inaccessible will be marked faulty.
|
|
* For 'f' and 'r', the device can also be a kernel-internal
|
|
* name such as 'sdb'.
|
|
*/
|
|
struct mddev_dev *add_devlist = NULL;
|
|
mdu_array_info_t array;
|
|
mdu_disk_info_t disc;
|
|
unsigned long long array_size;
|
|
struct mddev_dev *dv, *next = NULL;
|
|
struct stat stb;
|
|
int j, jnext = 0;
|
|
int tfd = -1;
|
|
struct supertype *st, *tst;
|
|
char *subarray = NULL;
|
|
int duuid[4];
|
|
int ouuid[4];
|
|
int lfd = -1;
|
|
int sysfd = -1;
|
|
int count = 0; /* number of actions taken */
|
|
struct mdinfo info;
|
|
int frozen = 0;
|
|
|
|
if (ioctl(fd, GET_ARRAY_INFO, &array)) {
|
|
fprintf(stderr, Name ": cannot get array info for %s\n",
|
|
devname);
|
|
goto abort;
|
|
}
|
|
sysfs_init(&info, fd, 0);
|
|
|
|
/* array.size is only 32 bit and may be truncated.
|
|
* So read from sysfs if possible, and record number of sectors
|
|
*/
|
|
|
|
array_size = get_component_size(fd);
|
|
if (array_size <= 0)
|
|
array_size = array.size * 2;
|
|
|
|
tst = super_by_fd(fd, &subarray);
|
|
if (!tst) {
|
|
fprintf(stderr, Name ": unsupport array - version %d.%d\n",
|
|
array.major_version, array.minor_version);
|
|
goto abort;
|
|
}
|
|
|
|
stb.st_rdev = 0;
|
|
for (dv = devlist, j=0 ; dv; dv = next, j = jnext) {
|
|
unsigned long long ldsize;
|
|
char dvname[20];
|
|
char *dnprintable = dv->devname;
|
|
char *add_dev = dv->devname;
|
|
int err;
|
|
int re_add_failed = 0;
|
|
|
|
next = dv->next;
|
|
jnext = 0;
|
|
|
|
if (strcmp(dv->devname, "failed")==0 ||
|
|
strcmp(dv->devname, "faulty")==0) {
|
|
int remaining_disks = array.nr_disks;
|
|
if (dv->disposition != 'r') {
|
|
fprintf(stderr, Name ": %s only meaningful "
|
|
"with -r, not -%c\n",
|
|
dv->devname, dv->disposition);
|
|
goto abort;
|
|
}
|
|
for (; j < 1024 && remaining_disks > 0; j++) {
|
|
unsigned dev;
|
|
disc.number = j;
|
|
if (ioctl(fd, GET_DISK_INFO, &disc))
|
|
continue;
|
|
if (disc.major == 0 && disc.minor == 0)
|
|
continue;
|
|
remaining_disks --;
|
|
if ((disc.state & 1) == 0) /* faulty */
|
|
continue;
|
|
dev = makedev(disc.major, disc.minor);
|
|
if (stb.st_rdev == dev)
|
|
/* already did that one */
|
|
continue;
|
|
stb.st_rdev = dev;
|
|
next = dv;
|
|
/* same slot again next time - things might
|
|
* have reshuffled */
|
|
jnext = j;
|
|
sprintf(dvname,"%d:%d", disc.major, disc.minor);
|
|
dnprintable = dvname;
|
|
break;
|
|
}
|
|
if (next != dv)
|
|
continue;
|
|
} else if (strcmp(dv->devname, "detached") == 0) {
|
|
int remaining_disks = array.nr_disks;
|
|
if (dv->disposition != 'r' && dv->disposition != 'f') {
|
|
fprintf(stderr, Name ": %s only meaningful "
|
|
"with -r of -f, not -%c\n",
|
|
dv->devname, dv->disposition);
|
|
goto abort;
|
|
}
|
|
for (; j < 1024 && remaining_disks > 0; j++) {
|
|
int sfd;
|
|
unsigned dev;
|
|
disc.number = j;
|
|
if (ioctl(fd, GET_DISK_INFO, &disc))
|
|
continue;
|
|
if (disc.major == 0 && disc.minor == 0)
|
|
continue;
|
|
remaining_disks --;
|
|
sprintf(dvname,"%d:%d", disc.major, disc.minor);
|
|
sfd = dev_open(dvname, O_RDONLY);
|
|
if (sfd >= 0) {
|
|
close(sfd);
|
|
continue;
|
|
}
|
|
if (dv->disposition == 'f' &&
|
|
(disc.state & 1) == 1) /* already faulty */
|
|
continue;
|
|
if (errno != ENXIO)
|
|
continue;
|
|
dev = makedev(disc.major, disc.minor);
|
|
if (stb.st_rdev == dev)
|
|
/* already did that one */
|
|
continue;
|
|
stb.st_rdev = dev;
|
|
next = dv;
|
|
/* same slot again next time - things might
|
|
* have reshuffled */
|
|
jnext = j;
|
|
dnprintable = dvname;
|
|
break;
|
|
}
|
|
if (next != dv)
|
|
continue;
|
|
} else if (strcmp(dv->devname, "missing") == 0) {
|
|
if (dv->disposition != 'a' || dv->re_add == 0) {
|
|
fprintf(stderr, Name ": 'missing' only meaningful "
|
|
"with --re-add\n");
|
|
goto abort;
|
|
}
|
|
if (add_devlist == NULL)
|
|
add_devlist = conf_get_devs();
|
|
if (add_devlist == NULL) {
|
|
fprintf(stderr, Name ": no devices to scan for missing members.");
|
|
continue;
|
|
}
|
|
add_dev = add_devlist->devname;
|
|
add_devlist = add_devlist->next;
|
|
if (add_devlist != NULL)
|
|
next = dv;
|
|
if (stat(add_dev, &stb) < 0)
|
|
continue;
|
|
} else if (strchr(dv->devname, '/') == NULL &&
|
|
strchr(dv->devname, ':') == NULL &&
|
|
strlen(dv->devname) < 50) {
|
|
/* Assume this is a kernel-internal name like 'sda1' */
|
|
int found = 0;
|
|
char dname[55];
|
|
if (dv->disposition != 'r' && dv->disposition != 'f') {
|
|
fprintf(stderr, Name ": %s only meaningful "
|
|
"with -r or -f, not -%c\n",
|
|
dv->devname, dv->disposition);
|
|
goto abort;
|
|
}
|
|
|
|
sprintf(dname, "dev-%s", dv->devname);
|
|
sysfd = sysfs_open(fd2devnum(fd), dname, "block/dev");
|
|
if (sysfd >= 0) {
|
|
char dn[20];
|
|
int mj,mn;
|
|
if (sysfs_fd_get_str(sysfd, dn, 20) > 0 &&
|
|
sscanf(dn, "%d:%d", &mj,&mn) == 2) {
|
|
stb.st_rdev = makedev(mj,mn);
|
|
found = 1;
|
|
}
|
|
close(sysfd);
|
|
sysfd = -1;
|
|
}
|
|
if (!found) {
|
|
sysfd = sysfs_open(fd2devnum(fd), dname, "state");
|
|
if (sysfd < 0) {
|
|
fprintf(stderr, Name ": %s does not appear "
|
|
"to be a component of %s\n",
|
|
dv->devname, devname);
|
|
goto abort;
|
|
}
|
|
}
|
|
} else {
|
|
j = 0;
|
|
|
|
tfd = dev_open(dv->devname, O_RDONLY);
|
|
if (tfd < 0 && dv->disposition == 'r' &&
|
|
lstat(dv->devname, &stb) == 0)
|
|
/* Be happy, the lstat worked, that is
|
|
* enough for --remove
|
|
*/
|
|
;
|
|
else {
|
|
if (tfd < 0 || fstat(tfd, &stb) != 0) {
|
|
fprintf(stderr, Name ": cannot find %s: %s\n",
|
|
dv->devname, strerror(errno));
|
|
if (tfd >= 0)
|
|
close(tfd);
|
|
goto abort;
|
|
}
|
|
close(tfd);
|
|
tfd = -1;
|
|
}
|
|
if ((stb.st_mode & S_IFMT) != S_IFBLK) {
|
|
fprintf(stderr, Name ": %s is not a "
|
|
"block device.\n",
|
|
dv->devname);
|
|
goto abort;
|
|
}
|
|
}
|
|
switch(dv->disposition){
|
|
default:
|
|
fprintf(stderr, Name ": internal error - devmode[%s]=%d\n",
|
|
dv->devname, dv->disposition);
|
|
goto abort;
|
|
case 'a':
|
|
/* add the device */
|
|
if (subarray) {
|
|
fprintf(stderr, Name ": Cannot add disks to a"
|
|
" \'member\' array, perform this"
|
|
" operation on the parent container\n");
|
|
goto abort;
|
|
}
|
|
/* Make sure it isn't in use (in 2.6 or later) */
|
|
tfd = dev_open(add_dev, O_RDONLY|O_EXCL|O_DIRECT);
|
|
if (tfd < 0 && add_dev != dv->devname)
|
|
continue;
|
|
if (tfd < 0) {
|
|
fprintf(stderr, Name ": Cannot open %s: %s\n",
|
|
dv->devname, strerror(errno));
|
|
goto abort;
|
|
}
|
|
if (!frozen) {
|
|
if (sysfs_freeze_array(&info) == 1)
|
|
frozen = 1;
|
|
else
|
|
frozen = -1;
|
|
}
|
|
|
|
st = dup_super(tst);
|
|
|
|
if (array.not_persistent==0)
|
|
st->ss->load_super(st, tfd, NULL);
|
|
|
|
if (add_dev == dv->devname) {
|
|
if (!get_dev_size(tfd, dv->devname, &ldsize)) {
|
|
st->ss->free_super(st);
|
|
close(tfd);
|
|
goto abort;
|
|
}
|
|
} else if (!get_dev_size(tfd, NULL, &ldsize)) {
|
|
st->ss->free_super(st);
|
|
close(tfd);
|
|
tfd = -1;
|
|
continue;
|
|
}
|
|
|
|
if (tst->ss->validate_geometry(
|
|
tst, array.level, array.layout,
|
|
array.raid_disks, NULL,
|
|
ldsize >> 9, NULL, NULL, 0) == 0) {
|
|
if (!force) {
|
|
fprintf(stderr, Name
|
|
": %s is larger than %s can "
|
|
"effectively use.\n"
|
|
" Add --force is you "
|
|
"really want to add this device.\n",
|
|
add_dev, devname);
|
|
st->ss->free_super(st);
|
|
close(tfd);
|
|
goto abort;
|
|
}
|
|
fprintf(stderr, Name
|
|
": %s is larger than %s can "
|
|
"effectively use.\n"
|
|
" Adding anyway as --force "
|
|
"was given.\n",
|
|
add_dev, devname);
|
|
}
|
|
if (!tst->ss->external &&
|
|
array.major_version == 0 &&
|
|
md_get_version(fd)%100 < 2) {
|
|
close(tfd);
|
|
st->ss->free_super(st);
|
|
tfd = -1;
|
|
if (ioctl(fd, HOT_ADD_DISK,
|
|
(unsigned long)stb.st_rdev)==0) {
|
|
if (verbose >= 0)
|
|
fprintf(stderr, Name ": hot added %s\n",
|
|
add_dev);
|
|
continue;
|
|
}
|
|
|
|
fprintf(stderr, Name ": hot add failed for %s: %s\n",
|
|
add_dev, strerror(errno));
|
|
goto abort;
|
|
}
|
|
|
|
if (array.not_persistent == 0 || tst->ss->external) {
|
|
|
|
/* need to find a sample superblock to copy, and
|
|
* a spare slot to use.
|
|
* For 'external' array (well, container based),
|
|
* We can just load the metadata for the array.
|
|
*/
|
|
if (tst->sb)
|
|
/* already loaded */;
|
|
else if (tst->ss->external) {
|
|
tst->ss->load_container(tst, fd, NULL);
|
|
} else for (j = 0; j < tst->max_devs; j++) {
|
|
char *dev;
|
|
int dfd;
|
|
disc.number = j;
|
|
if (ioctl(fd, GET_DISK_INFO, &disc))
|
|
continue;
|
|
if (disc.major==0 && disc.minor==0)
|
|
continue;
|
|
if ((disc.state & 4)==0) continue; /* sync */
|
|
/* Looks like a good device to try */
|
|
dev = map_dev(disc.major, disc.minor, 1);
|
|
if (!dev) continue;
|
|
dfd = dev_open(dev, O_RDONLY);
|
|
if (dfd < 0) continue;
|
|
if (tst->ss->load_super(tst, dfd,
|
|
NULL)) {
|
|
close(dfd);
|
|
continue;
|
|
}
|
|
close(dfd);
|
|
break;
|
|
}
|
|
/* FIXME this is a bad test to be using */
|
|
if (!tst->sb &&
|
|
dv->re_add) {
|
|
/* we are re-adding a device to a
|
|
* completely dead array - have to depend
|
|
* on kernel to check
|
|
*/
|
|
} else if (!tst->sb) {
|
|
close(tfd);
|
|
st->ss->free_super(st);
|
|
fprintf(stderr, Name ": cannot load array metadata from %s\n", devname);
|
|
goto abort;
|
|
}
|
|
|
|
/* Make sure device is large enough */
|
|
if (tst->ss->avail_size(tst, ldsize/512) <
|
|
array_size) {
|
|
close(tfd);
|
|
tfd = -1;
|
|
st->ss->free_super(st);
|
|
if (add_dev != dv->devname)
|
|
continue;
|
|
fprintf(stderr, Name ": %s not large enough to join array\n",
|
|
dv->devname);
|
|
goto abort;
|
|
}
|
|
|
|
/* Possibly this device was recently part of the array
|
|
* and was temporarily removed, and is now being re-added.
|
|
* If so, we can simply re-add it.
|
|
*/
|
|
|
|
if (st->sb) {
|
|
struct mdinfo mdi;
|
|
st->ss->getinfo_super(st, &mdi, NULL);
|
|
st->ss->uuid_from_super(st, ouuid);
|
|
if (tst->sb)
|
|
tst->ss->uuid_from_super(tst, duuid);
|
|
else
|
|
/* Assume uuid matches: kernel will check */
|
|
memcpy(duuid, ouuid, sizeof(ouuid));
|
|
if ((mdi.disk.state & (1<<MD_DISK_ACTIVE)) &&
|
|
!(mdi.disk.state & (1<<MD_DISK_FAULTY)) &&
|
|
memcmp(duuid, ouuid, sizeof(ouuid))==0) {
|
|
/* look like it is worth a try. Need to
|
|
* make sure kernel will accept it though.
|
|
*/
|
|
/* re-add doesn't work for version-1 superblocks
|
|
* before 2.6.18 :-(
|
|
*/
|
|
if (array.major_version == 1 &&
|
|
get_linux_version() <= 2006018)
|
|
goto skip_re_add;
|
|
disc.number = mdi.disk.number;
|
|
if (ioctl(fd, GET_DISK_INFO, &disc) != 0
|
|
|| disc.major != 0 || disc.minor != 0
|
|
)
|
|
goto skip_re_add;
|
|
disc.major = major(stb.st_rdev);
|
|
disc.minor = minor(stb.st_rdev);
|
|
disc.number = mdi.disk.number;
|
|
disc.raid_disk = mdi.disk.raid_disk;
|
|
disc.state = mdi.disk.state;
|
|
if (dv->writemostly == 1)
|
|
disc.state |= 1 << MD_DISK_WRITEMOSTLY;
|
|
if (dv->writemostly == 2)
|
|
disc.state &= ~(1 << MD_DISK_WRITEMOSTLY);
|
|
remove_partitions(tfd);
|
|
close(tfd);
|
|
tfd = -1;
|
|
if (update || dv->writemostly > 0) {
|
|
int rv = -1;
|
|
tfd = dev_open(dv->devname, O_RDWR);
|
|
if (tfd < 0) {
|
|
fprintf(stderr, Name ": failed to open %s for"
|
|
" superblock update during re-add\n", dv->devname);
|
|
st->ss->free_super(st);
|
|
goto abort;
|
|
}
|
|
|
|
if (dv->writemostly == 1)
|
|
rv = st->ss->update_super(
|
|
st, NULL, "writemostly",
|
|
devname, verbose, 0, NULL);
|
|
if (dv->writemostly == 2)
|
|
rv = st->ss->update_super(
|
|
st, NULL, "readwrite",
|
|
devname, verbose, 0, NULL);
|
|
if (update)
|
|
rv = st->ss->update_super(
|
|
st, NULL, update,
|
|
devname, verbose, 0, NULL);
|
|
if (rv == 0)
|
|
rv = st->ss->store_super(st, tfd);
|
|
close(tfd);
|
|
tfd = -1;
|
|
if (rv != 0) {
|
|
fprintf(stderr, Name ": failed to update"
|
|
" superblock during re-add\n");
|
|
st->ss->free_super(st);
|
|
goto abort;
|
|
}
|
|
}
|
|
/* don't even try if disk is marked as faulty */
|
|
errno = 0;
|
|
if (ioctl(fd, ADD_NEW_DISK, &disc) == 0) {
|
|
if (verbose >= 0)
|
|
fprintf(stderr, Name ": re-added %s\n", add_dev);
|
|
count++;
|
|
st->ss->free_super(st);
|
|
continue;
|
|
}
|
|
if (errno == ENOMEM || errno == EROFS) {
|
|
fprintf(stderr, Name ": add new device failed for %s: %s\n",
|
|
add_dev, strerror(errno));
|
|
st->ss->free_super(st);
|
|
if (add_dev != dv->devname)
|
|
continue;
|
|
goto abort;
|
|
}
|
|
skip_re_add:
|
|
re_add_failed = 1;
|
|
}
|
|
st->ss->free_super(st);
|
|
}
|
|
if (add_dev != dv->devname) {
|
|
if (verbose > 0)
|
|
fprintf(stderr, Name
|
|
": --re-add for %s to %s is not possible\n",
|
|
add_dev, devname);
|
|
if (tfd >= 0) {
|
|
close(tfd);
|
|
tfd = -1;
|
|
}
|
|
continue;
|
|
}
|
|
if (dv->re_add) {
|
|
if (tfd >= 0)
|
|
close(tfd);
|
|
fprintf(stderr, Name
|
|
": --re-add for %s to %s is not possible\n",
|
|
dv->devname, devname);
|
|
goto abort;
|
|
}
|
|
if (re_add_failed) {
|
|
fprintf(stderr, Name ": %s reports being an active member for %s, but a --re-add fails.\n",
|
|
dv->devname, devname);
|
|
fprintf(stderr, Name ": not performing --add as that would convert %s in to a spare.\n",
|
|
dv->devname);
|
|
fprintf(stderr, Name ": To make this a spare, use \"mdadm --zero-superblock %s\" first.\n",
|
|
dv->devname);
|
|
if (tfd >= 0)
|
|
close(tfd);
|
|
goto abort;
|
|
}
|
|
} else {
|
|
/* non-persistent. Must ensure that new drive
|
|
* is at least array.size big.
|
|
*/
|
|
if (ldsize/512 < array_size) {
|
|
fprintf(stderr, Name ": %s not large enough to join array\n",
|
|
dv->devname);
|
|
if (tfd >= 0)
|
|
close(tfd);
|
|
goto abort;
|
|
}
|
|
}
|
|
/* committed to really trying this device now*/
|
|
if (tfd >= 0) {
|
|
remove_partitions(tfd);
|
|
close(tfd);
|
|
tfd = -1;
|
|
}
|
|
/* in 2.6.17 and earlier, version-1 superblocks won't
|
|
* use the number we write, but will choose a free number.
|
|
* we must choose the same free number, which requires
|
|
* starting at 'raid_disks' and counting up
|
|
*/
|
|
for (j = array.raid_disks; j< tst->max_devs; j++) {
|
|
disc.number = j;
|
|
if (ioctl(fd, GET_DISK_INFO, &disc))
|
|
break;
|
|
if (disc.major==0 && disc.minor==0)
|
|
break;
|
|
if (disc.state & 8) /* removed */
|
|
break;
|
|
}
|
|
disc.major = major(stb.st_rdev);
|
|
disc.minor = minor(stb.st_rdev);
|
|
disc.number =j;
|
|
disc.state = 0;
|
|
if (array.not_persistent==0) {
|
|
int dfd;
|
|
if (dv->writemostly == 1)
|
|
disc.state |= 1 << MD_DISK_WRITEMOSTLY;
|
|
dfd = dev_open(dv->devname, O_RDWR | O_EXCL|O_DIRECT);
|
|
if (tst->ss->add_to_super(tst, &disc, dfd,
|
|
dv->devname)) {
|
|
close(dfd);
|
|
goto abort;
|
|
}
|
|
if (tst->ss->write_init_super(tst)) {
|
|
close(dfd);
|
|
goto abort;
|
|
}
|
|
} else if (dv->re_add) {
|
|
/* this had better be raid1.
|
|
* As we are "--re-add"ing we must find a spare slot
|
|
* to fill.
|
|
*/
|
|
char *used = malloc(array.raid_disks);
|
|
memset(used, 0, array.raid_disks);
|
|
for (j=0; j< tst->max_devs; j++) {
|
|
mdu_disk_info_t disc2;
|
|
disc2.number = j;
|
|
if (ioctl(fd, GET_DISK_INFO, &disc2))
|
|
continue;
|
|
if (disc2.major==0 && disc2.minor==0)
|
|
continue;
|
|
if (disc2.state & 8) /* removed */
|
|
continue;
|
|
if (disc2.raid_disk < 0)
|
|
continue;
|
|
if (disc2.raid_disk > array.raid_disks)
|
|
continue;
|
|
used[disc2.raid_disk] = 1;
|
|
}
|
|
for (j=0 ; j<array.raid_disks; j++)
|
|
if (!used[j]) {
|
|
disc.raid_disk = j;
|
|
disc.state |= (1<<MD_DISK_SYNC);
|
|
break;
|
|
}
|
|
free(used);
|
|
}
|
|
if (dv->writemostly == 1)
|
|
disc.state |= (1 << MD_DISK_WRITEMOSTLY);
|
|
if (tst->ss->external) {
|
|
/* add a disk
|
|
* to an external metadata container */
|
|
struct mdinfo new_mdi;
|
|
struct mdinfo *sra;
|
|
int container_fd;
|
|
int devnum = fd2devnum(fd);
|
|
int dfd;
|
|
|
|
container_fd = open_dev_excl(devnum);
|
|
if (container_fd < 0) {
|
|
fprintf(stderr, Name ": add failed for %s:"
|
|
" could not get exclusive access to container\n",
|
|
dv->devname);
|
|
tst->ss->free_super(tst);
|
|
goto abort;
|
|
}
|
|
|
|
dfd = dev_open(dv->devname, O_RDWR | O_EXCL|O_DIRECT);
|
|
if (mdmon_running(tst->container_dev))
|
|
tst->update_tail = &tst->updates;
|
|
if (tst->ss->add_to_super(tst, &disc, dfd,
|
|
dv->devname)) {
|
|
close(dfd);
|
|
close(container_fd);
|
|
goto abort;
|
|
}
|
|
if (tst->update_tail)
|
|
flush_metadata_updates(tst);
|
|
else
|
|
tst->ss->sync_metadata(tst);
|
|
|
|
sra = sysfs_read(container_fd, -1, 0);
|
|
if (!sra) {
|
|
fprintf(stderr, Name ": add failed for %s: sysfs_read failed\n",
|
|
dv->devname);
|
|
close(container_fd);
|
|
tst->ss->free_super(tst);
|
|
goto abort;
|
|
}
|
|
sra->array.level = LEVEL_CONTAINER;
|
|
/* Need to set data_offset and component_size */
|
|
tst->ss->getinfo_super(tst, &new_mdi, NULL);
|
|
new_mdi.disk.major = disc.major;
|
|
new_mdi.disk.minor = disc.minor;
|
|
new_mdi.recovery_start = 0;
|
|
/* Make sure fds are closed as they are O_EXCL which
|
|
* would block add_disk */
|
|
tst->ss->free_super(tst);
|
|
if (sysfs_add_disk(sra, &new_mdi, 0) != 0) {
|
|
fprintf(stderr, Name ": add new device to external metadata"
|
|
" failed for %s\n", dv->devname);
|
|
close(container_fd);
|
|
sysfs_free(sra);
|
|
goto abort;
|
|
}
|
|
ping_monitor_by_id(devnum);
|
|
sysfs_free(sra);
|
|
close(container_fd);
|
|
} else {
|
|
tst->ss->free_super(tst);
|
|
if (ioctl(fd, ADD_NEW_DISK, &disc)) {
|
|
fprintf(stderr, Name ": add new device failed for %s as %d: %s\n",
|
|
dv->devname, j, strerror(errno));
|
|
goto abort;
|
|
}
|
|
}
|
|
if (verbose >= 0)
|
|
fprintf(stderr, Name ": added %s\n", dv->devname);
|
|
break;
|
|
|
|
case 'r':
|
|
/* hot remove */
|
|
if (subarray) {
|
|
fprintf(stderr, Name ": Cannot remove disks from a"
|
|
" \'member\' array, perform this"
|
|
" operation on the parent container\n");
|
|
if (sysfd >= 0)
|
|
close(sysfd);
|
|
goto abort;
|
|
}
|
|
if (tst->ss->external) {
|
|
/* To remove a device from a container, we must
|
|
* check that it isn't in use in an array.
|
|
* This involves looking in the 'holders'
|
|
* directory - there must be just one entry,
|
|
* the container.
|
|
* To ensure that it doesn't get used as a
|
|
* hold spare while we are checking, we
|
|
* get an O_EXCL open on the container
|
|
*/
|
|
int dnum = fd2devnum(fd);
|
|
lfd = open_dev_excl(dnum);
|
|
if (lfd < 0) {
|
|
fprintf(stderr, Name
|
|
": Cannot get exclusive access "
|
|
" to container - odd\n");
|
|
if (sysfd >= 0)
|
|
close(sysfd);
|
|
goto abort;
|
|
}
|
|
/* in the detached case it is not possible to
|
|
* check if we are the unique holder, so just
|
|
* rely on the 'detached' checks
|
|
*/
|
|
if (strcmp(dv->devname, "detached") == 0 ||
|
|
sysfd >= 0 ||
|
|
sysfs_unique_holder(dnum, stb.st_rdev))
|
|
/* pass */;
|
|
else {
|
|
fprintf(stderr, Name
|
|
": %s is %s, cannot remove.\n",
|
|
dnprintable,
|
|
errno == EEXIST ? "still in use":
|
|
"not a member");
|
|
close(lfd);
|
|
goto abort;
|
|
}
|
|
}
|
|
/* FIXME check that it is a current member */
|
|
if (sysfd >= 0) {
|
|
/* device has been removed and we don't know
|
|
* the major:minor number
|
|
*/
|
|
int n = write(sysfd, "remove", 6);
|
|
if (n != 6)
|
|
err = -1;
|
|
else
|
|
err = 0;
|
|
close(sysfd);
|
|
sysfd = -1;
|
|
} else {
|
|
err = ioctl(fd, HOT_REMOVE_DISK, (unsigned long)stb.st_rdev);
|
|
if (err && errno == ENODEV) {
|
|
/* Old kernels rejected this if no personality
|
|
* registered */
|
|
struct mdinfo *sra = sysfs_read(fd, 0, GET_DEVS);
|
|
struct mdinfo *dv = NULL;
|
|
if (sra)
|
|
dv = sra->devs;
|
|
for ( ; dv ; dv=dv->next)
|
|
if (dv->disk.major == (int)major(stb.st_rdev) &&
|
|
dv->disk.minor == (int)minor(stb.st_rdev))
|
|
break;
|
|
if (dv)
|
|
err = sysfs_set_str(sra, dv,
|
|
"state", "remove");
|
|
else
|
|
err = -1;
|
|
if (sra)
|
|
sysfs_free(sra);
|
|
}
|
|
}
|
|
if (err) {
|
|
fprintf(stderr, Name ": hot remove failed "
|
|
"for %s: %s\n", dnprintable,
|
|
strerror(errno));
|
|
if (lfd >= 0)
|
|
close(lfd);
|
|
goto abort;
|
|
}
|
|
if (tst->ss->external) {
|
|
/*
|
|
* Before dropping our exclusive open we make an
|
|
* attempt at preventing mdmon from seeing an
|
|
* 'add' event before reconciling this 'remove'
|
|
* event.
|
|
*/
|
|
char *name = devnum2devname(fd2devnum(fd));
|
|
|
|
if (!name) {
|
|
fprintf(stderr, Name ": unable to get container name\n");
|
|
goto abort;
|
|
}
|
|
|
|
ping_manager(name);
|
|
free(name);
|
|
}
|
|
if (lfd >= 0)
|
|
close(lfd);
|
|
count++;
|
|
if (verbose >= 0)
|
|
fprintf(stderr, Name ": hot removed %s from %s\n",
|
|
dnprintable, devname);
|
|
break;
|
|
|
|
case 'f': /* set faulty */
|
|
/* FIXME check current member */
|
|
if ((sysfd >= 0 && write(sysfd, "faulty", 6) != 6) ||
|
|
(sysfd < 0 && ioctl(fd, SET_DISK_FAULTY,
|
|
(unsigned long) stb.st_rdev))) {
|
|
fprintf(stderr, Name ": set device faulty failed for %s: %s\n",
|
|
dnprintable, strerror(errno));
|
|
if (sysfd >= 0)
|
|
close(sysfd);
|
|
goto abort;
|
|
}
|
|
if (sysfd >= 0)
|
|
close(sysfd);
|
|
sysfd = -1;
|
|
count++;
|
|
if (verbose >= 0)
|
|
fprintf(stderr, Name ": set %s faulty in %s\n",
|
|
dnprintable, devname);
|
|
break;
|
|
}
|
|
}
|
|
if (frozen > 0)
|
|
sysfs_set_str(&info, NULL, "sync_action","idle");
|
|
if (test && count == 0)
|
|
return 2;
|
|
return 0;
|
|
|
|
abort:
|
|
if (frozen > 0)
|
|
sysfs_set_str(&info, NULL, "sync_action","idle");
|
|
return 1;
|
|
}
|
|
|
|
int autodetect(void)
|
|
{
|
|
/* Open any md device, and issue the RAID_AUTORUN ioctl */
|
|
int rv = 1;
|
|
int fd = dev_open("9:0", O_RDONLY);
|
|
if (fd >= 0) {
|
|
if (ioctl(fd, RAID_AUTORUN, 0) == 0)
|
|
rv = 0;
|
|
close(fd);
|
|
}
|
|
return rv;
|
|
}
|
|
|
|
int Update_subarray(char *dev, char *subarray, char *update, struct mddev_ident *ident, int quiet)
|
|
{
|
|
struct supertype supertype, *st = &supertype;
|
|
int fd, rv = 2;
|
|
|
|
memset(st, 0, sizeof(*st));
|
|
|
|
fd = open_subarray(dev, subarray, st, quiet);
|
|
if (fd < 0)
|
|
return 2;
|
|
|
|
if (!st->ss->update_subarray) {
|
|
if (!quiet)
|
|
fprintf(stderr,
|
|
Name ": Operation not supported for %s metadata\n",
|
|
st->ss->name);
|
|
goto free_super;
|
|
}
|
|
|
|
if (mdmon_running(st->devnum))
|
|
st->update_tail = &st->updates;
|
|
|
|
rv = st->ss->update_subarray(st, subarray, update, ident);
|
|
|
|
if (rv) {
|
|
if (!quiet)
|
|
fprintf(stderr, Name ": Failed to update %s of subarray-%s in %s\n",
|
|
update, subarray, dev);
|
|
} else if (st->update_tail)
|
|
flush_metadata_updates(st);
|
|
else
|
|
st->ss->sync_metadata(st);
|
|
|
|
if (rv == 0 && strcmp(update, "name") == 0 && !quiet)
|
|
fprintf(stderr,
|
|
Name ": Updated subarray-%s name from %s, UUIDs may have changed\n",
|
|
subarray, dev);
|
|
|
|
free_super:
|
|
st->ss->free_super(st);
|
|
close(fd);
|
|
|
|
return rv;
|
|
}
|
|
|
|
/* Move spare from one array to another
|
|
* If adding to destination array fails
|
|
* add back to original array
|
|
* Returns 1 on success, 0 on failure */
|
|
int move_spare(char *from_devname, char *to_devname, dev_t devid)
|
|
{
|
|
struct mddev_dev devlist;
|
|
char devname[20];
|
|
|
|
/* try to remove and add */
|
|
int fd1 = open(to_devname, O_RDONLY);
|
|
int fd2 = open(from_devname, O_RDONLY);
|
|
|
|
if (fd1 < 0 || fd2 < 0) {
|
|
if (fd1>=0) close(fd1);
|
|
if (fd2>=0) close(fd2);
|
|
return 0;
|
|
}
|
|
|
|
devlist.next = NULL;
|
|
devlist.used = 0;
|
|
devlist.re_add = 0;
|
|
devlist.writemostly = 0;
|
|
devlist.devname = devname;
|
|
sprintf(devname, "%d:%d", major(devid), minor(devid));
|
|
|
|
devlist.disposition = 'r';
|
|
if (Manage_subdevs(from_devname, fd2, &devlist, -1, 0, NULL, 0) == 0) {
|
|
devlist.disposition = 'a';
|
|
if (Manage_subdevs(to_devname, fd1, &devlist, -1, 0, NULL, 0) == 0) {
|
|
/* make sure manager is aware of changes */
|
|
ping_manager(to_devname);
|
|
ping_manager(from_devname);
|
|
close(fd1);
|
|
close(fd2);
|
|
return 1;
|
|
}
|
|
else Manage_subdevs(from_devname, fd2, &devlist, -1, 0, NULL, 0);
|
|
}
|
|
close(fd1);
|
|
close(fd2);
|
|
return 0;
|
|
}
|
|
#endif
|