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authorNeil Brown <neilb@suse.de>2002-04-04 01:58:32 +0000
committerNeil Brown <neilb@suse.de>2002-04-04 01:58:32 +0000
commite0d1903663dac9307a37646c26abf7991b0a9593 (patch)
tree882780adec3f7fa11826a34156426414db22d982 /Query.c
parent11a3e71da434939895cc504e20e735eb656b1c74 (diff)
downloadmdadm-e0d1903663dac9307a37646c26abf7991b0a9593.tar.gz
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mdadm-0.8mdadm-0.8
Diffstat (limited to 'Query.c')
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+/*
+ * mdadm - manage Linux "md" devices aka RAID arrays.
+ *
+ * Copyright (C) 2002 Neil Brown <neilb@cse.unsw.edu.au>
+ *
+ *
+ * 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@cse.unsw.edu.au>
+ * Paper: Neil Brown
+ * School of Computer Science and Engineering
+ * The University of New South Wales
+ * Sydney, 2052
+ * Australia
+ */
+
+#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 = open(dev, O_RDONLY, 0);
+ int vers;
+ int ioctlerr;
+ int superror, superrno;
+ mdp_super_t super;
+ mdu_array_info_t array;
+ unsigned long long larray_size;
+ unsigned long array_size;
+ struct stat stb;
+ char *mddev;
+ mdu_disk_info_t disc;
+ char *activity;
+
+ if (fd < 0){
+ fprintf(stderr, Name ": cannot open %s: %s\n",
+ dev, strerror(errno));
+ return 1;
+ }
+
+ vers = md_get_version(fd);
+ if (ioctl(fd, GET_ARRAY_INFO, &array)<0)
+ ioctlerr = errno;
+ else ioctlerr = 0;
+ superror = load_super(fd, &super);
+ superrno = errno;
+
+ fstat(fd, &stb);
+
+ if (vers>=9000 && !ioctlerr) {
+#ifdef BLKGETSIZE64
+ if (ioctl(fd, BLKGETSIZE64, &larray_size)==0)
+ ;
+ else
+#endif
+ if (ioctl(fd, BLKGETSIZE, &array_size)==0)
+ larray_size = array_size<<9;
+ else larray_size = 0;
+ }
+ close(fd);
+
+ if (vers < 0)
+ printf("%s: is not an md array\n", dev);
+ else if (vers < 9000)
+ printf("%s: is an md device, but kernel cannot provide details\n", dev);
+ else if (ioctlerr == ENODEV)
+ printf("%s: is an md device which is not active\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),
+ map_num(pers, array.level),
+ array.raid_disks,
+ array.spare_disks, array.spare_disks==1?"":"s");
+ }
+ switch(superror) {
+ case 1:
+ printf("%s: cannot find device size: %s\n",
+ dev, strerror(superrno));
+ break;
+ case 2:
+ printf("%s: is too small to be an md componenet.\n",
+ dev);
+ break;
+ case 3:
+ printf("%s: Cannot seek to superblock: %s\n",
+ dev, strerror(superrno));
+ break;
+ case 4:
+ printf("%s: Cannot read md superblock.\n",
+ dev);
+ break;
+ case 5:
+ printf("%s: No md super block found, not an md component.\n",
+ dev);
+ break;
+ case 6:
+ printf("%s: md superblock present with wrong version: %d\n",
+ dev, super.major_version);
+ break;
+ default:
+ /* array might be active... */
+ mddev = get_md_name(super.md_minor);
+ disc.number = super.this_disk.number;
+ activity = "inactive";
+ if (mddev && (fd = open(mddev, O_RDONLY))>=0) {
+ if (md_get_version(fd) >= 9000 &&
+ ioctl(fd, GET_ARRAY_INFO, &array)>= 0) {
+ if (ioctl(fd, GET_DISK_INFO, &disc) >= 0 &&
+ MKDEV(disc.major,disc.minor) == stb.st_rdev)
+ activity = "active";
+ else
+ activity = "mismatch";
+ }
+ close(fd);
+ }
+ printf("%s: device %d in %d device %s %s md%d. Use mdadm --examine for more detail.\n",
+ dev,
+ super.this_disk.number, super.raid_disks,
+ activity,
+ map_num(pers, super.level),
+ super.md_minor);
+ break;
+ }
+ return 0;
+}
+
+