Adding upstream version 4.2.
Signed-off-by: Daniel Baumann <daniel@debian.org>
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279 changed files with 77998 additions and 0 deletions
227
Build.c
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227
Build.c
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/*
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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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int Build(char *mddev, struct mddev_dev *devlist,
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struct shape *s, struct context *c)
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{
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/* Build a linear or raid0 arrays without superblocks
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* We cannot really do any checks, we just do it.
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* For md_version < 0.90.0, we call REGISTER_DEV
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* with the device numbers, and then
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* START_MD giving the "geometry"
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* geometry is 0xpp00cc
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* where pp is personality: 1==linear, 2=raid0
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* cc = chunk size factor: 0==4k, 1==8k etc.
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*/
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int i;
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dev_t rdev;
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int subdevs = 0, missing_disks = 0;
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struct mddev_dev *dv;
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int bitmap_fd;
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unsigned long long bitmapsize;
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int mdfd;
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char chosen_name[1024];
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int uuid[4] = {0,0,0,0};
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struct map_ent *map = NULL;
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mdu_array_info_t array;
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mdu_param_t param; /* not used by syscall */
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if (s->level == UnSet) {
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pr_err("a RAID level is needed to Build an array.\n");
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return 1;
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}
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/* scan all devices, make sure they really are block devices */
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for (dv = devlist; dv; dv=dv->next) {
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subdevs++;
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if (strcmp("missing", dv->devname) == 0) {
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missing_disks++;
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continue;
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}
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if (!stat_is_blkdev(dv->devname, NULL))
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return 1;
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}
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if (s->raiddisks != subdevs) {
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pr_err("requested %d devices in array but listed %d\n",
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s->raiddisks, subdevs);
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return 1;
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}
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if (s->layout == UnSet)
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switch(s->level) {
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default: /* no layout */
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s->layout = 0;
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break;
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case 10:
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s->layout = 0x102; /* near=2, far=1 */
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if (c->verbose > 0)
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pr_err("layout defaults to n1\n");
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break;
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case 5:
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case 6:
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s->layout = map_name(r5layout, "default");
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if (c->verbose > 0)
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pr_err("layout defaults to %s\n", map_num(r5layout, s->layout));
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break;
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case LEVEL_FAULTY:
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s->layout = map_name(faultylayout, "default");
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if (c->verbose > 0)
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pr_err("layout defaults to %s\n", map_num(faultylayout, s->layout));
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break;
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}
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/* We need to create the device. It can have no name. */
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map_lock(&map);
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mdfd = create_mddev(mddev, NULL, c->autof, LOCAL,
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chosen_name, 0);
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if (mdfd < 0) {
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map_unlock(&map);
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return 1;
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}
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mddev = chosen_name;
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map_update(&map, fd2devnm(mdfd), "none", uuid, chosen_name);
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map_unlock(&map);
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array.level = s->level;
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if (s->size == MAX_SIZE)
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s->size = 0;
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array.size = s->size;
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array.nr_disks = s->raiddisks;
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array.raid_disks = s->raiddisks;
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array.md_minor = 0;
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if (fstat_is_blkdev(mdfd, mddev, &rdev))
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array.md_minor = minor(rdev);
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array.not_persistent = 1;
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array.state = 0; /* not clean, but no errors */
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if (s->assume_clean)
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array.state |= 1;
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array.active_disks = s->raiddisks - missing_disks;
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array.working_disks = s->raiddisks - missing_disks;
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array.spare_disks = 0;
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array.failed_disks = missing_disks;
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if (s->chunk == 0 && (s->level==0 || s->level==LEVEL_LINEAR))
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s->chunk = 64;
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array.chunk_size = s->chunk*1024;
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array.layout = s->layout;
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if (md_set_array_info(mdfd, &array)) {
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pr_err("md_set_array_info() failed for %s: %s\n",
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mddev, strerror(errno));
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goto abort;
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}
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if (s->bitmap_file && strcmp(s->bitmap_file, "none") == 0)
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s->bitmap_file = NULL;
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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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goto abort;
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}
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/* now add the devices */
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for ((i=0), (dv = devlist) ; dv ; i++, dv=dv->next) {
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mdu_disk_info_t disk;
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unsigned long long dsize;
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int fd;
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if (strcmp("missing", dv->devname) == 0)
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continue;
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if (!stat_is_blkdev(dv->devname, &rdev))
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goto abort;
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fd = open(dv->devname, O_RDONLY|O_EXCL);
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if (fd < 0) {
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pr_err("Cannot open %s: %s\n",
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dv->devname, strerror(errno));
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goto abort;
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}
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if (get_dev_size(fd, NULL, &dsize) &&
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(s->size == 0 || s->size == MAX_SIZE || dsize < s->size))
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s->size = dsize;
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close(fd);
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disk.number = i;
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disk.raid_disk = i;
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disk.state = (1<<MD_DISK_SYNC) | (1<<MD_DISK_ACTIVE);
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if (dv->writemostly == FlagSet)
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disk.state |= 1<<MD_DISK_WRITEMOSTLY;
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disk.major = major(rdev);
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disk.minor = minor(rdev);
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if (ioctl(mdfd, ADD_NEW_DISK, &disk)) {
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pr_err("ADD_NEW_DISK failed for %s: %s\n",
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dv->devname, strerror(errno));
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goto abort;
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}
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}
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/* now to start it */
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if (s->bitmap_file) {
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bitmap_fd = open(s->bitmap_file, O_RDWR);
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if (bitmap_fd < 0) {
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int major = BITMAP_MAJOR_HI;
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#if 0
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if (s->bitmap_chunk == UnSet) {
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pr_err("%s cannot be opened.\n", s->bitmap_file);
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goto abort;
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}
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#endif
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bitmapsize = s->size >> 9; /* FIXME wrong for RAID10 */
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if (CreateBitmap(s->bitmap_file, 1, NULL,
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s->bitmap_chunk, c->delay,
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s->write_behind, bitmapsize, major)) {
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goto abort;
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}
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bitmap_fd = open(s->bitmap_file, O_RDWR);
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if (bitmap_fd < 0) {
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pr_err("%s cannot be opened.\n", s->bitmap_file);
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goto abort;
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}
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}
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if (bitmap_fd >= 0) {
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if (ioctl(mdfd, SET_BITMAP_FILE, bitmap_fd) < 0) {
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pr_err("Cannot set bitmap file for %s: %s\n",
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mddev, strerror(errno));
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goto abort;
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}
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}
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}
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if (ioctl(mdfd, RUN_ARRAY, ¶m)) {
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pr_err("RUN_ARRAY failed: %s\n", strerror(errno));
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if (s->chunk & (s->chunk - 1)) {
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cont_err("Problem may be that chunk size is not a power of 2\n");
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}
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goto abort;
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}
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if (c->verbose >= 0)
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pr_err("array %s built and started.\n",
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mddev);
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wait_for(mddev, mdfd);
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close(mdfd);
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return 0;
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abort:
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ioctl(mdfd, STOP_ARRAY, 0);
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close(mdfd);
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return 1;
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}
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