| /* |
| * mdadm - manage Linux "md" devices aka RAID arrays. |
| * |
| * Copyright (C) 2001-2009 Neil Brown <neilb@suse.de> |
| * |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| * |
| * Author: Neil Brown |
| * Email: <neilb@suse.de> |
| */ |
| |
| #include "mdadm.h" |
| |
| int Build(char *mddev, struct mddev_dev *devlist, |
| struct shape *s, struct context *c) |
| { |
| /* Build a linear or raid0 arrays without superblocks |
| * We cannot really do any checks, we just do it. |
| * For md_version < 0.90.0, we call REGISTER_DEV |
| * with the device numbers, and then |
| * START_MD giving the "geometry" |
| * geometry is 0xpp00cc |
| * where pp is personality: 1==linear, 2=raid0 |
| * cc = chunk size factor: 0==4k, 1==8k etc. |
| */ |
| int i; |
| dev_t rdev; |
| int subdevs = 0, missing_disks = 0; |
| struct mddev_dev *dv; |
| int bitmap_fd; |
| unsigned long long bitmapsize; |
| int mdfd; |
| char chosen_name[1024]; |
| int uuid[4] = {0,0,0,0}; |
| struct map_ent *map = NULL; |
| mdu_array_info_t array; |
| mdu_param_t param; /* not used by syscall */ |
| |
| if (s->level == UnSet) { |
| pr_err("a RAID level is needed to Build an array.\n"); |
| return 1; |
| } |
| /* scan all devices, make sure they really are block devices */ |
| for (dv = devlist; dv; dv=dv->next) { |
| subdevs++; |
| if (strcmp("missing", dv->devname) == 0) { |
| missing_disks++; |
| continue; |
| } |
| if (!stat_is_blkdev(dv->devname, NULL)) |
| return 1; |
| } |
| |
| if (s->raiddisks != subdevs) { |
| pr_err("requested %d devices in array but listed %d\n", |
| s->raiddisks, subdevs); |
| return 1; |
| } |
| |
| if (s->layout == UnSet) |
| switch(s->level) { |
| default: /* no layout */ |
| s->layout = 0; |
| break; |
| case 10: |
| s->layout = 0x102; /* near=2, far=1 */ |
| if (c->verbose > 0) |
| pr_err("layout defaults to n1\n"); |
| break; |
| case 5: |
| case 6: |
| s->layout = map_name(r5layout, "default"); |
| if (c->verbose > 0) |
| pr_err("layout defaults to %s\n", map_num(r5layout, s->layout)); |
| break; |
| case LEVEL_FAULTY: |
| s->layout = map_name(faultylayout, "default"); |
| |
| if (c->verbose > 0) |
| pr_err("layout defaults to %s\n", map_num(faultylayout, s->layout)); |
| break; |
| } |
| |
| /* We need to create the device. It can have no name. */ |
| map_lock(&map); |
| mdfd = create_mddev(mddev, NULL, c->autof, LOCAL, |
| chosen_name, 0); |
| if (mdfd < 0) { |
| map_unlock(&map); |
| return 1; |
| } |
| mddev = chosen_name; |
| |
| map_update(&map, fd2devnm(mdfd), "none", uuid, chosen_name); |
| map_unlock(&map); |
| |
| array.level = s->level; |
| if (s->size == MAX_SIZE) |
| s->size = 0; |
| array.size = s->size; |
| array.nr_disks = s->raiddisks; |
| array.raid_disks = s->raiddisks; |
| array.md_minor = 0; |
| if (fstat_is_blkdev(mdfd, mddev, &rdev)) |
| array.md_minor = minor(rdev); |
| array.not_persistent = 1; |
| array.state = 0; /* not clean, but no errors */ |
| if (s->assume_clean) |
| array.state |= 1; |
| array.active_disks = s->raiddisks - missing_disks; |
| array.working_disks = s->raiddisks - missing_disks; |
| array.spare_disks = 0; |
| array.failed_disks = missing_disks; |
| if (s->chunk == 0 && (s->level==0 || s->level==LEVEL_LINEAR)) |
| s->chunk = 64; |
| array.chunk_size = s->chunk*1024; |
| array.layout = s->layout; |
| if (md_set_array_info(mdfd, &array)) { |
| pr_err("md_set_array_info() failed for %s: %s\n", |
| mddev, strerror(errno)); |
| goto abort; |
| } |
| |
| if (s->bitmap_file && strcmp(s->bitmap_file, "none") == 0) |
| s->bitmap_file = NULL; |
| if (s->bitmap_file && s->level <= 0) { |
| pr_err("bitmaps not meaningful with level %s\n", |
| map_num(pers, s->level)?:"given"); |
| goto abort; |
| } |
| /* now add the devices */ |
| for ((i=0), (dv = devlist) ; dv ; i++, dv=dv->next) { |
| mdu_disk_info_t disk; |
| unsigned long long dsize; |
| int fd; |
| |
| if (strcmp("missing", dv->devname) == 0) |
| continue; |
| if (!stat_is_blkdev(dv->devname, &rdev)) |
| goto abort; |
| fd = open(dv->devname, O_RDONLY|O_EXCL); |
| if (fd < 0) { |
| pr_err("Cannot open %s: %s\n", |
| dv->devname, strerror(errno)); |
| goto abort; |
| } |
| if (get_dev_size(fd, NULL, &dsize) && |
| (s->size == 0 || s->size == MAX_SIZE || dsize < s->size)) |
| s->size = dsize; |
| close(fd); |
| disk.number = i; |
| disk.raid_disk = i; |
| disk.state = (1<<MD_DISK_SYNC) | (1<<MD_DISK_ACTIVE); |
| if (dv->writemostly == FlagSet) |
| disk.state |= 1<<MD_DISK_WRITEMOSTLY; |
| disk.major = major(rdev); |
| disk.minor = minor(rdev); |
| if (ioctl(mdfd, ADD_NEW_DISK, &disk)) { |
| pr_err("ADD_NEW_DISK failed for %s: %s\n", |
| dv->devname, strerror(errno)); |
| goto abort; |
| } |
| } |
| /* now to start it */ |
| if (s->bitmap_file) { |
| bitmap_fd = open(s->bitmap_file, O_RDWR); |
| if (bitmap_fd < 0) { |
| int major = BITMAP_MAJOR_HI; |
| #if 0 |
| if (s->bitmap_chunk == UnSet) { |
| pr_err("%s cannot be opened.\n", s->bitmap_file); |
| goto abort; |
| } |
| #endif |
| bitmapsize = s->size >> 9; /* FIXME wrong for RAID10 */ |
| if (CreateBitmap(s->bitmap_file, 1, NULL, |
| s->bitmap_chunk, c->delay, |
| s->write_behind, bitmapsize, major)) { |
| goto abort; |
| } |
| bitmap_fd = open(s->bitmap_file, O_RDWR); |
| if (bitmap_fd < 0) { |
| pr_err("%s cannot be opened.\n", s->bitmap_file); |
| goto abort; |
| } |
| } |
| if (bitmap_fd >= 0) { |
| if (ioctl(mdfd, SET_BITMAP_FILE, bitmap_fd) < 0) { |
| pr_err("Cannot set bitmap file for %s: %s\n", |
| mddev, strerror(errno)); |
| goto abort; |
| } |
| } |
| } |
| if (ioctl(mdfd, RUN_ARRAY, ¶m)) { |
| pr_err("RUN_ARRAY failed: %s\n", strerror(errno)); |
| if (s->chunk & (s->chunk - 1)) { |
| cont_err("Problem may be that chunk size is not a power of 2\n"); |
| } |
| goto abort; |
| } |
| |
| if (c->verbose >= 0) |
| pr_err("array %s built and started.\n", |
| mddev); |
| wait_for(mddev, mdfd); |
| close(mdfd); |
| return 0; |
| |
| abort: |
| ioctl(mdfd, STOP_ARRAY, 0); |
| close(mdfd); |
| return 1; |
| } |