72ca9bcff3
mdadm --create /dev/md0 .... /dev/sda1:1024 /dev/sdb1:2048 ... The size is in K unless a suffix: K M G is given. The suffix 's' means sectors. Signed-off-by: NeilBrown <neilb@suse.de>
1041 lines
27 KiB
C
1041 lines
27 KiB
C
/*
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* mdadm - manage Linux "md" devices aka RAID arrays.
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*
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* Copyright (C) 2001-2012 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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static int default_layout(struct supertype *st, int level, int verbose)
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{
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int layout = UnSet;
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if (st && st->ss->default_geometry)
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st->ss->default_geometry(st, &level, &layout, NULL);
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if (layout == UnSet)
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switch(level) {
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default: /* no layout */
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layout = 0;
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break;
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case 10:
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layout = 0x102; /* near=2, far=1 */
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if (verbose > 0)
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pr_err("layout defaults to n2\n");
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break;
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case 5:
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case 6:
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layout = map_name(r5layout, "default");
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if (verbose > 0)
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pr_err("layout defaults to %s\n", map_num(r5layout, layout));
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break;
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case LEVEL_FAULTY:
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layout = map_name(faultylayout, "default");
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if (verbose > 0)
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pr_err("layout defaults to %s\n", map_num(faultylayout, layout));
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break;
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}
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return layout;
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}
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int Create(struct supertype *st, char *mddev,
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char *name, int *uuid,
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int subdevs, struct mddev_dev *devlist,
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struct shape *s,
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struct context *c, unsigned long long data_offset)
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{
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/*
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* Create a new raid array.
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*
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* First check that necessary details are available
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* (i.e. level, raid-disks)
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*
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* Then check each disk to see what might be on it
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* and report anything interesting.
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*
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* If anything looks odd, and runstop not set,
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* abort.
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*
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* SET_ARRAY_INFO and ADD_NEW_DISK, and
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* if runstop==run, or raiddisks disks were used,
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* RUN_ARRAY
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*/
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int mdfd;
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unsigned long long minsize=0, maxsize=0;
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char *mindisc = NULL;
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char *maxdisc = NULL;
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int dnum;
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struct mddev_dev *dv;
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int fail=0, warn=0;
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struct stat stb;
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int first_missing = subdevs * 2;
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int second_missing = subdevs * 2;
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int missing_disks = 0;
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int insert_point = subdevs * 2; /* where to insert a missing drive */
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int total_slots;
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int pass;
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int vers;
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int rv;
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int bitmap_fd;
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int have_container = 0;
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int container_fd = -1;
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int need_mdmon = 0;
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unsigned long long bitmapsize;
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struct mdinfo info, *infos;
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int did_default = 0;
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int do_default_layout = 0;
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int do_default_chunk = 0;
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unsigned long safe_mode_delay = 0;
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char chosen_name[1024];
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struct map_ent *map = NULL;
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unsigned long long newsize;
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int major_num = BITMAP_MAJOR_HI;
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memset(&info, 0, sizeof(info));
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if (s->level == UnSet && st && st->ss->default_geometry)
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st->ss->default_geometry(st, &s->level, NULL, NULL);
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if (s->level == UnSet) {
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pr_err("a RAID level is needed to create an array.\n");
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return 1;
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}
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if (s->raiddisks < 4 && s->level == 6) {
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pr_err("at least 4 raid-devices needed for level 6\n");
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return 1;
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}
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if (s->raiddisks > 256 && s->level == 6) {
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pr_err("no more than 256 raid-devices supported for level 6\n");
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return 1;
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}
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if (s->raiddisks < 2 && s->level >= 4) {
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pr_err("at least 2 raid-devices needed for level 4 or 5\n");
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return 1;
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}
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if (s->level <= 0 && s->sparedisks) {
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pr_err("This level does not support spare devices\n");
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return 1;
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}
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if (subdevs == 1 && strcmp(devlist->devname, "missing") != 0) {
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/* If given a single device, it might be a container, and we can
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* extract a device list from there
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*/
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mdu_array_info_t inf;
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int fd;
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memset(&inf, 0, sizeof(inf));
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fd = open(devlist->devname, O_RDONLY);
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if (fd >= 0 &&
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ioctl(fd, GET_ARRAY_INFO, &inf) == 0 &&
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inf.raid_disks == 0) {
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/* yep, looks like a container */
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if (st) {
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rv = st->ss->load_container(st, fd,
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devlist->devname);
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if (rv == 0)
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have_container = 1;
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} else {
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st = super_by_fd(fd, NULL);
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if (st && !(rv = st->ss->
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load_container(st, fd,
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devlist->devname)))
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have_container = 1;
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else
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st = NULL;
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}
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if (have_container) {
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subdevs = s->raiddisks;
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first_missing = subdevs * 2;
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second_missing = subdevs * 2;
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insert_point = subdevs * 2;
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}
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}
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if (fd >= 0)
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close(fd);
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}
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if (st && st->ss->external && s->sparedisks) {
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pr_err("This metadata type does not support "
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"spare disks at create time\n");
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return 1;
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}
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if (subdevs > s->raiddisks+s->sparedisks) {
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pr_err("You have listed more devices (%d) than are in the array(%d)!\n", subdevs, s->raiddisks+s->sparedisks);
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return 1;
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}
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if (!have_container && subdevs < s->raiddisks+s->sparedisks) {
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pr_err("You haven't given enough devices (real or missing) to create this array\n");
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return 1;
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}
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if (s->bitmap_file && s->level <= 0) {
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pr_err("bitmaps not meaningful with level %s\n",
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map_num(pers, s->level)?:"given");
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return 1;
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}
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/* now set some defaults */
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if (s->layout == UnSet) {
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do_default_layout = 1;
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s->layout = default_layout(st, s->level, c->verbose);
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}
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if (s->level == 10)
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/* check layout fits in array*/
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if ((s->layout&255) * ((s->layout>>8)&255) > s->raiddisks) {
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pr_err("that layout requires at least %d devices\n",
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(s->layout&255) * ((s->layout>>8)&255));
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return 1;
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}
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switch(s->level) {
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case 4:
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case 5:
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case 10:
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case 6:
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case 0:
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if (s->chunk == 0 || s->chunk == UnSet) {
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s->chunk = UnSet;
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do_default_chunk = 1;
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/* chunk will be set later */
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}
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break;
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case LEVEL_LINEAR:
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/* a chunksize of zero 0s perfectly valid (and preferred) since 2.6.16 */
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if (get_linux_version() < 2006016 && s->chunk == 0) {
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s->chunk = 64;
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if (c->verbose > 0)
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pr_err("chunk size defaults to 64K\n");
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}
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break;
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case 1:
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case LEVEL_FAULTY:
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case LEVEL_MULTIPATH:
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case LEVEL_CONTAINER:
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if (s->chunk) {
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s->chunk = 0;
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if (c->verbose > 0)
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pr_err("chunk size ignored for this level\n");
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}
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break;
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default:
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pr_err("unknown level %d\n", s->level);
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return 1;
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}
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if (s->size == MAX_SIZE)
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/* use '0' to mean 'max' now... */
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s->size = 0;
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if (s->size && s->chunk && s->chunk != UnSet)
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s->size &= ~(unsigned long long)(s->chunk - 1);
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newsize = s->size * 2;
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if (st && ! st->ss->validate_geometry(st, s->level, s->layout, s->raiddisks,
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&s->chunk, s->size*2,
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data_offset, NULL,
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&newsize, c->verbose>=0))
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return 1;
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if (s->chunk && s->chunk != UnSet) {
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newsize &= ~(unsigned long long)(s->chunk*2 - 1);
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if (do_default_chunk) {
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/* default chunk was just set */
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if (c->verbose > 0)
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pr_err("chunk size "
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"defaults to %dK\n", s->chunk);
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s->size &= ~(unsigned long long)(s->chunk - 1);
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do_default_chunk = 0;
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}
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}
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if (s->size == 0) {
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s->size = newsize / 2;
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if (s->level == 1)
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/* If this is ever reshaped to RAID5, we will
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* need a chunksize. So round it off a bit
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* now just to be safe
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*/
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s->size &= ~(64ULL-1);
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if (s->size && c->verbose > 0)
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pr_err("setting size to %lluK\n", s->size);
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}
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/* now look at the subdevs */
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info.array.active_disks = 0;
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info.array.working_disks = 0;
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dnum = 0;
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for (dv=devlist; dv && !have_container; dv=dv->next, dnum++) {
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char *dname = dv->devname;
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unsigned long long freesize;
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int dfd;
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char *doff;
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if (strcasecmp(dname, "missing")==0) {
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if (first_missing > dnum)
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first_missing = dnum;
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if (second_missing > dnum && dnum > first_missing)
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second_missing = dnum;
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missing_disks ++;
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continue;
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}
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if (data_offset != VARIABLE_OFFSET) {
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doff = strchr(dname, ':');
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if (doff) {
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*doff++ = 0;
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dv->data_offset = parse_size(doff);
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} else
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dv->data_offset = INVALID_SECTORS;
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} else
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dv->data_offset = data_offset;
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dfd = open(dname, O_RDONLY);
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if (dfd < 0) {
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pr_err("cannot open %s: %s\n",
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dname, strerror(errno));
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exit(2);
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}
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if (fstat(dfd, &stb) != 0 ||
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(stb.st_mode & S_IFMT) != S_IFBLK) {
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close(dfd);
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pr_err("%s is not a block device\n",
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dname);
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exit(2);
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}
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close(dfd);
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info.array.working_disks++;
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if (dnum < s->raiddisks)
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info.array.active_disks++;
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if (st == NULL) {
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struct createinfo *ci = conf_get_create_info();
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if (ci)
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st = ci->supertype;
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}
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if (st == NULL) {
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/* Need to choose a default metadata, which is different
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* depending on geometry of array.
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*/
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int i;
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char *name = "default";
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for(i=0; !st && superlist[i]; i++) {
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st = superlist[i]->match_metadata_desc(name);
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if (!st)
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continue;
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if (do_default_layout)
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s->layout = default_layout(st, s->level, c->verbose);
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switch (st->ss->validate_geometry(
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st, s->level, s->layout, s->raiddisks,
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&s->chunk, s->size*2,
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dv->data_offset, dname,
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&freesize, c->verbose > 0)) {
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case -1: /* Not valid, message printed, and not
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* worth checking any further */
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exit(2);
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break;
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case 0: /* Geometry not valid */
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free(st);
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st = NULL;
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s->chunk = do_default_chunk ? UnSet : s->chunk;
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break;
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case 1: /* All happy */
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break;
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}
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}
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if (!st) {
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int dfd = open(dname, O_RDONLY|O_EXCL);
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if (dfd < 0) {
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pr_err("cannot open %s: %s\n",
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dname, strerror(errno));
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exit(2);
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}
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pr_err("device %s not suitable "
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"for any style of array\n",
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dname);
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exit(2);
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}
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if (st->ss != &super0 ||
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st->minor_version != 90)
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did_default = 1;
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} else {
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if (do_default_layout)
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s->layout = default_layout(st, s->level, 0);
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if (!st->ss->validate_geometry(st, s->level, s->layout,
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s->raiddisks,
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&s->chunk, s->size*2,
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dv->data_offset,
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dname, &freesize,
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c->verbose >= 0)) {
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pr_err("%s is not suitable for "
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"this array.\n",
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dname);
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fail = 1;
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continue;
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}
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}
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freesize /= 2; /* convert to K */
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if (s->chunk && s->chunk != UnSet) {
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/* round to chunk size */
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freesize = freesize & ~(s->chunk-1);
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if (do_default_chunk) {
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/* default chunk was just set */
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if (c->verbose > 0)
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pr_err("chunk size "
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"defaults to %dK\n", s->chunk);
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s->size &= ~(unsigned long long)(s->chunk - 1);
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do_default_chunk = 0;
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}
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}
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if (s->size && freesize < s->size) {
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pr_err("%s is smaller than given size."
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" %lluK < %lluK + metadata\n",
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dname, freesize, s->size);
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fail = 1;
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continue;
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}
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if (maxdisc == NULL || (maxdisc && freesize > maxsize)) {
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maxdisc = dname;
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maxsize = freesize;
|
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}
|
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if (mindisc ==NULL || (mindisc && freesize < minsize)) {
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mindisc = dname;
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minsize = freesize;
|
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}
|
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if (c->runstop != 1 || c->verbose >= 0) {
|
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int fd = open(dname, O_RDONLY);
|
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if (fd <0 ) {
|
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pr_err("Cannot open %s: %s\n",
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dname, strerror(errno));
|
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fail=1;
|
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continue;
|
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}
|
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warn |= check_ext2(fd, dname);
|
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warn |= check_reiser(fd, dname);
|
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warn |= check_raid(fd, dname);
|
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if (strcmp(st->ss->name, "1.x") == 0 &&
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st->minor_version >= 1)
|
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/* metadata at front */
|
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warn |= check_partitions(fd, dname, 0, 0);
|
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else if (s->level == 1 || s->level == LEVEL_CONTAINER
|
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|| (s->level == 0 && s->raiddisks == 1))
|
|
/* partitions could be meaningful */
|
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warn |= check_partitions(fd, dname, freesize*2, s->size*2);
|
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else
|
|
/* partitions cannot be meaningful */
|
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warn |= check_partitions(fd, dname, 0, 0);
|
|
if (strcmp(st->ss->name, "1.x") == 0 &&
|
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st->minor_version >= 1 &&
|
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did_default &&
|
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s->level == 1 &&
|
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(warn & 1024) == 0) {
|
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warn |= 1024;
|
|
pr_err("Note: this array has metadata at the start and\n"
|
|
" may not be suitable as a boot device. If you plan to\n"
|
|
" store '/boot' on this device please ensure that\n"
|
|
" your boot-loader understands md/v1.x metadata, or use\n"
|
|
" --metadata=0.90\n");
|
|
}
|
|
close(fd);
|
|
}
|
|
}
|
|
if (s->raiddisks + s->sparedisks > st->max_devs) {
|
|
pr_err("Too many devices:"
|
|
" %s metadata only supports %d\n",
|
|
st->ss->name, st->max_devs);
|
|
return 1;
|
|
}
|
|
if (have_container)
|
|
info.array.working_disks = s->raiddisks;
|
|
if (fail) {
|
|
pr_err("create aborted\n");
|
|
return 1;
|
|
}
|
|
if (s->size == 0) {
|
|
if (mindisc == NULL && !have_container) {
|
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pr_err("no size and no drives given - aborting create.\n");
|
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return 1;
|
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}
|
|
if (s->level > 0 || s->level == LEVEL_MULTIPATH
|
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|| s->level == LEVEL_FAULTY
|
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|| st->ss->external ) {
|
|
/* size is meaningful */
|
|
if (!st->ss->validate_geometry(st, s->level, s->layout,
|
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s->raiddisks,
|
|
&s->chunk, minsize*2,
|
|
data_offset,
|
|
NULL, NULL, 0)) {
|
|
pr_err("devices too large for RAID level %d\n", s->level);
|
|
return 1;
|
|
}
|
|
s->size = minsize;
|
|
if (s->level == 1)
|
|
/* If this is ever reshaped to RAID5, we will
|
|
* need a chunksize. So round it off a bit
|
|
* now just to be safe
|
|
*/
|
|
s->size &= ~(64ULL-1);
|
|
if (c->verbose > 0)
|
|
pr_err("size set to %lluK\n", s->size);
|
|
}
|
|
}
|
|
if (!have_container && s->level > 0 && ((maxsize-s->size)*100 > maxsize)) {
|
|
if (c->runstop != 1 || c->verbose >= 0)
|
|
pr_err("largest drive (%s) exceeds size (%lluK) by more than 1%%\n",
|
|
maxdisc, s->size);
|
|
warn = 1;
|
|
}
|
|
|
|
if (st->ss->detail_platform && st->ss->detail_platform(0, 1, NULL) != 0) {
|
|
if (c->runstop != 1 || c->verbose >= 0)
|
|
pr_err("%s unable to enumerate platform support\n"
|
|
" array may not be compatible with hardware/firmware\n",
|
|
st->ss->name);
|
|
warn = 1;
|
|
}
|
|
|
|
if (warn) {
|
|
if (c->runstop!= 1) {
|
|
if (!ask("Continue creating array? ")) {
|
|
pr_err("create aborted.\n");
|
|
return 1;
|
|
}
|
|
} else {
|
|
if (c->verbose > 0)
|
|
pr_err("creation continuing despite oddities due to --run\n");
|
|
}
|
|
}
|
|
|
|
/* If this is raid4/5, we want to configure the last active slot
|
|
* as missing, so that a reconstruct happens (faster than re-parity)
|
|
* FIX: Can we do this for raid6 as well?
|
|
*/
|
|
if (st->ss->external == 0 &&
|
|
s->assume_clean==0 && c->force == 0 && first_missing >= s->raiddisks) {
|
|
switch ( s->level ) {
|
|
case 4:
|
|
case 5:
|
|
insert_point = s->raiddisks-1;
|
|
s->sparedisks++;
|
|
info.array.active_disks--;
|
|
missing_disks++;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
/* For raid6, if creating with 1 missing drive, make a good drive
|
|
* into a spare, else the create will fail
|
|
*/
|
|
if (s->assume_clean == 0 && c->force == 0 && first_missing < s->raiddisks &&
|
|
st->ss->external == 0 &&
|
|
second_missing >= s->raiddisks && s->level == 6) {
|
|
insert_point = s->raiddisks - 1;
|
|
if (insert_point == first_missing)
|
|
insert_point--;
|
|
s->sparedisks ++;
|
|
info.array.active_disks--;
|
|
missing_disks++;
|
|
}
|
|
|
|
if (s->level <= 0 && first_missing < subdevs * 2) {
|
|
pr_err("This level does not support missing devices\n");
|
|
return 1;
|
|
}
|
|
|
|
/* We need to create the device */
|
|
map_lock(&map);
|
|
mdfd = create_mddev(mddev, name, c->autof, LOCAL, chosen_name);
|
|
if (mdfd < 0) {
|
|
map_unlock(&map);
|
|
return 1;
|
|
}
|
|
/* verify if chosen_name is not in use,
|
|
* it could be in conflict with already existing device
|
|
* e.g. container, array
|
|
*/
|
|
if (strncmp(chosen_name, "/dev/md/", 8) == 0
|
|
&& map_by_name(&map, chosen_name+8) != NULL) {
|
|
pr_err("Array name %s is in use already.\n",
|
|
chosen_name);
|
|
close(mdfd);
|
|
map_unlock(&map);
|
|
return 1;
|
|
}
|
|
mddev = chosen_name;
|
|
|
|
vers = md_get_version(mdfd);
|
|
if (vers < 9000) {
|
|
pr_err("Create requires md driver version 0.90.0 or later\n");
|
|
goto abort_locked;
|
|
} else {
|
|
mdu_array_info_t inf;
|
|
memset(&inf, 0, sizeof(inf));
|
|
ioctl(mdfd, GET_ARRAY_INFO, &inf);
|
|
if (inf.working_disks != 0) {
|
|
pr_err("another array by this name"
|
|
" is already running.\n");
|
|
goto abort_locked;
|
|
}
|
|
}
|
|
|
|
/* Ok, lets try some ioctls */
|
|
|
|
info.array.level = s->level;
|
|
info.array.size = s->size;
|
|
info.array.raid_disks = s->raiddisks;
|
|
/* The kernel should *know* what md_minor we are dealing
|
|
* with, but it chooses to trust me instead. Sigh
|
|
*/
|
|
info.array.md_minor = 0;
|
|
if (fstat(mdfd, &stb)==0)
|
|
info.array.md_minor = minor(stb.st_rdev);
|
|
info.array.not_persistent = 0;
|
|
|
|
if ( ( (s->level == 4 || s->level == 5) &&
|
|
(insert_point < s->raiddisks || first_missing < s->raiddisks) )
|
|
||
|
|
( s->level == 6 && (insert_point < s->raiddisks
|
|
|| second_missing < s->raiddisks))
|
|
||
|
|
( s->level <= 0 )
|
|
||
|
|
s->assume_clean
|
|
) {
|
|
info.array.state = 1; /* clean, but one+ drive will be missing*/
|
|
info.resync_start = MaxSector;
|
|
} else {
|
|
info.array.state = 0; /* not clean, but no errors */
|
|
info.resync_start = 0;
|
|
}
|
|
if (s->level == 10) {
|
|
/* for raid10, the bitmap size is the capacity of the array,
|
|
* which is array.size * raid_disks / ncopies;
|
|
* .. but convert to sectors.
|
|
*/
|
|
int ncopies = ((s->layout>>8) & 255) * (s->layout & 255);
|
|
bitmapsize = s->size * s->raiddisks / ncopies * 2;
|
|
/* printf("bms=%llu as=%d rd=%d nc=%d\n", bitmapsize, s->size, s->raiddisks, ncopies);*/
|
|
} else
|
|
bitmapsize = s->size * 2;
|
|
|
|
/* There is lots of redundancy in these disk counts,
|
|
* raid_disks is the most meaningful value
|
|
* it describes the geometry of the array
|
|
* it is constant
|
|
* nr_disks is total number of used slots.
|
|
* it should be raid_disks+spare_disks
|
|
* spare_disks is the number of extra disks present
|
|
* see above
|
|
* active_disks is the number of working disks in
|
|
* active slots. (With raid_disks)
|
|
* working_disks is the total number of working disks,
|
|
* including spares
|
|
* failed_disks is the number of disks marked failed
|
|
*
|
|
* Ideally, the kernel would keep these (except raid_disks)
|
|
* up-to-date as we ADD_NEW_DISK, but it doesn't (yet).
|
|
* So for now, we assume that all raid and spare
|
|
* devices will be given.
|
|
*/
|
|
info.array.spare_disks=s->sparedisks;
|
|
info.array.failed_disks=missing_disks;
|
|
info.array.nr_disks = info.array.working_disks
|
|
+ info.array.failed_disks;
|
|
info.array.layout = s->layout;
|
|
info.array.chunk_size = s->chunk*1024;
|
|
|
|
if (name == NULL || *name == 0) {
|
|
/* base name on mddev */
|
|
/* /dev/md0 -> 0
|
|
* /dev/md_d0 -> d0
|
|
* /dev/md/1 -> 1
|
|
* /dev/md/d1 -> d1
|
|
* /dev/md/home -> home
|
|
* /dev/mdhome -> home
|
|
*/
|
|
/* FIXME compare this with rules in create_mddev */
|
|
name = strrchr(mddev, '/');
|
|
if (name) {
|
|
name++;
|
|
if (strncmp(name, "md_d", 4)==0 &&
|
|
strlen(name) > 4 &&
|
|
isdigit(name[4]) &&
|
|
(name-mddev) == 5 /* /dev/ */)
|
|
name += 3;
|
|
else if (strncmp(name, "md", 2)==0 &&
|
|
strlen(name) > 2 &&
|
|
isdigit(name[2]) &&
|
|
(name-mddev) == 5 /* /dev/ */)
|
|
name += 2;
|
|
}
|
|
}
|
|
if (!st->ss->init_super(st, &info.array, s->size, name, c->homehost, uuid,
|
|
data_offset))
|
|
goto abort_locked;
|
|
|
|
total_slots = info.array.nr_disks;
|
|
st->ss->getinfo_super(st, &info, NULL);
|
|
sysfs_init(&info, mdfd, 0);
|
|
|
|
if (did_default && c->verbose >= 0) {
|
|
if (is_subarray(info.text_version)) {
|
|
int dnum = devname2devnum(info.text_version+1);
|
|
char *path;
|
|
int mdp = get_mdp_major();
|
|
struct mdinfo *mdi;
|
|
if (dnum > 0)
|
|
path = map_dev(MD_MAJOR, dnum, 1);
|
|
else
|
|
path = map_dev(mdp, (-1-dnum)<< 6, 1);
|
|
|
|
mdi = sysfs_read(-1, dnum, GET_VERSION);
|
|
|
|
pr_err("Creating array inside "
|
|
"%s container %s\n",
|
|
mdi?mdi->text_version:"managed", path);
|
|
sysfs_free(mdi);
|
|
} else
|
|
pr_err("Defaulting to version"
|
|
" %s metadata\n", info.text_version);
|
|
}
|
|
|
|
map_update(&map, fd2devnum(mdfd), info.text_version,
|
|
info.uuid, chosen_name);
|
|
map_unlock(&map);
|
|
|
|
if (s->bitmap_file && vers < 9003) {
|
|
major_num = BITMAP_MAJOR_HOSTENDIAN;
|
|
#ifdef __BIG_ENDIAN
|
|
pr_err("Warning - bitmaps created on this kernel are not portable\n"
|
|
" between different architectured. Consider upgrading the Linux kernel.\n");
|
|
#endif
|
|
}
|
|
|
|
if (s->bitmap_file && strcmp(s->bitmap_file, "internal")==0) {
|
|
if ((vers%100) < 2) {
|
|
pr_err("internal bitmaps not supported by this kernel.\n");
|
|
goto abort;
|
|
}
|
|
if (!st->ss->add_internal_bitmap) {
|
|
pr_err("internal bitmaps not supported with %s metadata\n",
|
|
st->ss->name);
|
|
goto abort;
|
|
}
|
|
if (!st->ss->add_internal_bitmap(st, &s->bitmap_chunk,
|
|
c->delay, s->write_behind,
|
|
bitmapsize, 1, major_num)) {
|
|
pr_err("Given bitmap chunk size not supported.\n");
|
|
goto abort;
|
|
}
|
|
s->bitmap_file = NULL;
|
|
}
|
|
|
|
sysfs_init(&info, mdfd, 0);
|
|
|
|
if (st->ss->external && st->container_dev != NoMdDev) {
|
|
/* member */
|
|
|
|
/* When creating a member, we need to be careful
|
|
* to negotiate with mdmon properly.
|
|
* If it is already running, we cannot write to
|
|
* the devices and must ask it to do that part.
|
|
* If it isn't running, we write to the devices,
|
|
* and then start it.
|
|
* We hold an exclusive open on the container
|
|
* device to make sure mdmon doesn't exit after
|
|
* we checked that it is running.
|
|
*
|
|
* For now, fail if it is already running.
|
|
*/
|
|
container_fd = open_dev_excl(st->container_dev);
|
|
if (container_fd < 0) {
|
|
pr_err("Cannot get exclusive "
|
|
"open on container - weird.\n");
|
|
goto abort;
|
|
}
|
|
if (mdmon_running(st->container_dev)) {
|
|
if (c->verbose)
|
|
pr_err("reusing mdmon "
|
|
"for %s.\n",
|
|
devnum2devname(st->container_dev));
|
|
st->update_tail = &st->updates;
|
|
} else
|
|
need_mdmon = 1;
|
|
}
|
|
rv = set_array_info(mdfd, st, &info);
|
|
if (rv) {
|
|
pr_err("failed to set array info for %s: %s\n",
|
|
mddev, strerror(errno));
|
|
goto abort;
|
|
}
|
|
|
|
if (s->bitmap_file) {
|
|
int uuid[4];
|
|
|
|
st->ss->uuid_from_super(st, uuid);
|
|
if (CreateBitmap(s->bitmap_file, c->force, (char*)uuid, s->bitmap_chunk,
|
|
c->delay, s->write_behind,
|
|
bitmapsize,
|
|
major_num)) {
|
|
goto abort;
|
|
}
|
|
bitmap_fd = open(s->bitmap_file, O_RDWR);
|
|
if (bitmap_fd < 0) {
|
|
pr_err("weird: %s cannot be openned\n",
|
|
s->bitmap_file);
|
|
goto abort;
|
|
}
|
|
if (ioctl(mdfd, SET_BITMAP_FILE, bitmap_fd) < 0) {
|
|
pr_err("Cannot set bitmap file for %s: %s\n",
|
|
mddev, strerror(errno));
|
|
goto abort;
|
|
}
|
|
}
|
|
|
|
infos = xmalloc(sizeof(*infos) * total_slots);
|
|
|
|
for (pass=1; pass <=2 ; pass++) {
|
|
struct mddev_dev *moved_disk = NULL; /* the disk that was moved out of the insert point */
|
|
|
|
for (dnum=0, dv = devlist ; dv ;
|
|
dv=(dv->next)?(dv->next):moved_disk, dnum++) {
|
|
int fd;
|
|
struct stat stb;
|
|
struct mdinfo *inf = &infos[dnum];
|
|
|
|
if (dnum >= total_slots)
|
|
abort();
|
|
if (dnum == insert_point) {
|
|
moved_disk = dv;
|
|
continue;
|
|
}
|
|
if (strcasecmp(dv->devname, "missing")==0)
|
|
continue;
|
|
if (have_container)
|
|
moved_disk = NULL;
|
|
if (have_container && dnum < info.array.raid_disks - 1)
|
|
/* repeatedly use the container */
|
|
moved_disk = dv;
|
|
|
|
switch(pass) {
|
|
case 1:
|
|
*inf = info;
|
|
|
|
inf->disk.number = dnum;
|
|
inf->disk.raid_disk = dnum;
|
|
if (inf->disk.raid_disk < s->raiddisks)
|
|
inf->disk.state = (1<<MD_DISK_ACTIVE) |
|
|
(1<<MD_DISK_SYNC);
|
|
else
|
|
inf->disk.state = 0;
|
|
|
|
if (dv->writemostly == 1)
|
|
inf->disk.state |= (1<<MD_DISK_WRITEMOSTLY);
|
|
|
|
if (have_container)
|
|
fd = -1;
|
|
else {
|
|
if (st->ss->external &&
|
|
st->container_dev != NoMdDev)
|
|
fd = open(dv->devname, O_RDWR);
|
|
else
|
|
fd = open(dv->devname, O_RDWR|O_EXCL);
|
|
|
|
if (fd < 0) {
|
|
pr_err("failed to open %s "
|
|
"after earlier success - aborting\n",
|
|
dv->devname);
|
|
goto abort;
|
|
}
|
|
fstat(fd, &stb);
|
|
inf->disk.major = major(stb.st_rdev);
|
|
inf->disk.minor = minor(stb.st_rdev);
|
|
}
|
|
if (fd >= 0)
|
|
remove_partitions(fd);
|
|
if (st->ss->add_to_super(st, &inf->disk,
|
|
fd, dv->devname,
|
|
dv->data_offset)) {
|
|
ioctl(mdfd, STOP_ARRAY, NULL);
|
|
goto abort;
|
|
}
|
|
st->ss->getinfo_super(st, inf, NULL);
|
|
safe_mode_delay = inf->safe_mode_delay;
|
|
|
|
if (have_container && c->verbose > 0)
|
|
pr_err("Using %s for device %d\n",
|
|
map_dev(inf->disk.major,
|
|
inf->disk.minor,
|
|
0), dnum);
|
|
|
|
if (!have_container) {
|
|
/* getinfo_super might have lost these ... */
|
|
inf->disk.major = major(stb.st_rdev);
|
|
inf->disk.minor = minor(stb.st_rdev);
|
|
}
|
|
break;
|
|
case 2:
|
|
inf->errors = 0;
|
|
|
|
rv = add_disk(mdfd, st, &info, inf);
|
|
|
|
if (rv) {
|
|
pr_err("ADD_NEW_DISK for %s "
|
|
"failed: %s\n",
|
|
dv->devname, strerror(errno));
|
|
goto abort;
|
|
}
|
|
break;
|
|
}
|
|
if (!have_container &&
|
|
dv == moved_disk && dnum != insert_point) break;
|
|
}
|
|
if (pass == 1) {
|
|
struct mdinfo info_new;
|
|
struct map_ent *me = NULL;
|
|
|
|
/* check to see if the uuid has changed due to these
|
|
* metadata changes, and if so update the member array
|
|
* and container uuid. Note ->write_init_super clears
|
|
* the subarray cursor such that ->getinfo_super once
|
|
* again returns container info.
|
|
*/
|
|
map_lock(&map);
|
|
st->ss->getinfo_super(st, &info_new, NULL);
|
|
if (st->ss->external && s->level != LEVEL_CONTAINER &&
|
|
!same_uuid(info_new.uuid, info.uuid, 0)) {
|
|
map_update(&map, fd2devnum(mdfd),
|
|
info_new.text_version,
|
|
info_new.uuid, chosen_name);
|
|
me = map_by_devnum(&map, st->container_dev);
|
|
}
|
|
|
|
if (st->ss->write_init_super(st)) {
|
|
st->ss->free_super(st);
|
|
goto abort_locked;
|
|
}
|
|
|
|
/* update parent container uuid */
|
|
if (me) {
|
|
char *path = xstrdup(me->path);
|
|
|
|
st->ss->getinfo_super(st, &info_new, NULL);
|
|
map_update(&map, st->container_dev,
|
|
info_new.text_version,
|
|
info_new.uuid, path);
|
|
free(path);
|
|
}
|
|
map_unlock(&map);
|
|
|
|
flush_metadata_updates(st);
|
|
st->ss->free_super(st);
|
|
}
|
|
}
|
|
free(infos);
|
|
|
|
if (s->level == LEVEL_CONTAINER) {
|
|
/* No need to start. But we should signal udev to
|
|
* create links */
|
|
sysfs_uevent(&info, "change");
|
|
if (c->verbose >= 0)
|
|
pr_err("container %s prepared.\n", mddev);
|
|
wait_for(chosen_name, mdfd);
|
|
} else if (c->runstop == 1 || subdevs >= s->raiddisks) {
|
|
if (st->ss->external) {
|
|
int err;
|
|
switch(s->level) {
|
|
case LEVEL_LINEAR:
|
|
case LEVEL_MULTIPATH:
|
|
case 0:
|
|
err = sysfs_set_str(&info, NULL, "array_state",
|
|
c->readonly
|
|
? "readonly"
|
|
: "active");
|
|
need_mdmon = 0;
|
|
break;
|
|
default:
|
|
err = sysfs_set_str(&info, NULL, "array_state",
|
|
"readonly");
|
|
break;
|
|
}
|
|
sysfs_set_safemode(&info, safe_mode_delay);
|
|
if (err) {
|
|
pr_err("failed to"
|
|
" activate array.\n");
|
|
ioctl(mdfd, STOP_ARRAY, NULL);
|
|
goto abort;
|
|
}
|
|
} else if (c->readonly &&
|
|
sysfs_attribute_available(
|
|
&info, NULL, "array_state")) {
|
|
if (sysfs_set_str(&info, NULL,
|
|
"array_state", "readonly") < 0) {
|
|
pr_err("Failed to start array: %s\n",
|
|
strerror(errno));
|
|
ioctl(mdfd, STOP_ARRAY, NULL);
|
|
goto abort;
|
|
}
|
|
} else {
|
|
/* param is not actually used */
|
|
mdu_param_t param;
|
|
if (ioctl(mdfd, RUN_ARRAY, ¶m)) {
|
|
pr_err("RUN_ARRAY failed: %s\n",
|
|
strerror(errno));
|
|
if (info.array.chunk_size & (info.array.chunk_size-1)) {
|
|
cont_err("Problem may be that "
|
|
"chunk size is not a power of 2\n");
|
|
}
|
|
ioctl(mdfd, STOP_ARRAY, NULL);
|
|
goto abort;
|
|
}
|
|
}
|
|
if (c->verbose >= 0)
|
|
pr_err("array %s started.\n", mddev);
|
|
if (st->ss->external && st->container_dev != NoMdDev) {
|
|
if (need_mdmon)
|
|
start_mdmon(st->container_dev);
|
|
|
|
ping_monitor_by_id(st->container_dev);
|
|
close(container_fd);
|
|
}
|
|
wait_for(chosen_name, mdfd);
|
|
} else {
|
|
pr_err("not starting array - not enough devices.\n");
|
|
}
|
|
close(mdfd);
|
|
return 0;
|
|
|
|
abort:
|
|
map_lock(&map);
|
|
abort_locked:
|
|
map_remove(&map, fd2devnum(mdfd));
|
|
map_unlock(&map);
|
|
|
|
if (mdfd >= 0)
|
|
close(mdfd);
|
|
return 1;
|
|
}
|