diff options
Diffstat (limited to 'Query.c')
| -rw-r--r-- | Query.c | 140 |
1 files changed, 140 insertions, 0 deletions
@@ -0,0 +1,140 @@ +/* + * mdadm - manage Linux "md" devices aka RAID arrays. + * + * Copyright (C) 2002-2009 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" +#include "md_p.h" +#include "md_u.h" + +int Query(char *dev) +{ + /* Give a brief description of the device, + * whether it is an md device and whether it has + * a superblock + */ + int fd; + int ioctlerr, staterr; + int superror; + int level, raid_disks, spare_disks; + struct mdinfo info; + struct mdinfo *sra; + struct supertype *st = NULL; + unsigned long long larray_size; + struct stat stb; + char *mddev; + mdu_disk_info_t disc; + char *activity; + + fd = open(dev, O_RDONLY); + if (fd < 0){ + pr_err("cannot open %s: %s\n", dev, strerror(errno)); + return 1; + } + + if (fstat(fd, &stb) < 0) + staterr = errno; + else + staterr = 0; + + ioctlerr = 0; + + sra = sysfs_read(fd, dev, GET_DISKS | GET_LEVEL | GET_DEVS | GET_STATE); + if (sra) { + level = sra->array.level; + raid_disks = sra->array.raid_disks; + spare_disks = sra->array.spare_disks; + } else { + mdu_array_info_t array; + + if (md_get_array_info(fd, &array) < 0) { + ioctlerr = errno; + level = -1; + raid_disks = -1; + spare_disks = -1; + } else { + level = array.level; + raid_disks = array.raid_disks; + spare_disks = array.spare_disks; + } + } + + if (!ioctlerr && !staterr) { + if (!get_dev_size(fd, NULL, &larray_size)) + larray_size = 0; + } + + if (ioctlerr == ENODEV) + printf("%s: is an md device which is not active\n", dev); + else if (ioctlerr && major(stb.st_rdev) != MD_MAJOR) + printf("%s: is not an md array\n", dev); + else if (ioctlerr) + printf("%s: is an md device, but gives \"%s\" when queried\n", + dev, strerror(ioctlerr)); + else { + printf("%s: %s %s %d devices, %d spare%s. Use mdadm --detail for more detail.\n", + dev, human_size_brief(larray_size,IEC), + map_num(pers, level), raid_disks, + spare_disks, spare_disks == 1 ? "" : "s"); + } + st = guess_super(fd); + if (st && st->ss->compare_super != NULL) + superror = st->ss->load_super(st, fd, dev); + else + superror = -1; + close(fd); + if (superror == 0) { + /* array might be active... */ + int uuid[4]; + struct map_ent *me, *map = NULL; + st->ss->getinfo_super(st, &info, NULL); + st->ss->uuid_from_super(st, uuid); + me = map_by_uuid(&map, uuid); + if (me) { + mddev = me->path; + disc.number = info.disk.number; + activity = "undetected"; + if (mddev && (fd = open(mddev, O_RDONLY))>=0) { + if (md_array_active(fd)) { + if (md_get_disk_info(fd, &disc) >= 0 && + makedev((unsigned)disc.major,(unsigned)disc.minor) == stb.st_rdev) + activity = "active"; + else + activity = "mismatch"; + } + close(fd); + } + } else { + activity = "inactive"; + mddev = "array"; + } + printf("%s: device %d in %d device %s %s %s. Use mdadm --examine for more detail.\n", + dev, + info.disk.number, info.array.raid_disks, + activity, + map_num(pers, info.array.level), + mddev); + if (st->ss == &super0) + put_md_name(mddev); + } + return 0; +} |