Adding upstream version 4.2.upstream/4.2upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

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;
+}