summaryrefslogtreecommitdiffstats
path: root/Query.c
diff options
context:
space:
mode:
Diffstat (limited to 'Query.c')
-rw-r--r--Query.c140
1 files changed, 140 insertions, 0 deletions
diff --git a/Query.c b/Query.c
new file mode 100644
index 0000000..23fbf8a
--- /dev/null
+++ b/Query.c
@@ -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;
+}