Adding upstream version 4.2.upstream/4.2upstream

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

1 files changed, 227 insertions, 0 deletions

diff --git a/Build.c b/Build.c
new file mode 100644
index 0000000..962c2e3
--- /dev/null
+++ b/Build.c
@@ -0,0 +1,227 @@
+/*
+ * 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, &param)) {
+		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;
+}