/*
- * mdctl - manage Linux "md" devices aka RAID arrays.
+ * mdadm - manage Linux "md" devices aka RAID arrays.
*
- * Copyright (C) 2001 Neil Brown <neilb@cse.unsw.edu.au>
+ * Copyright (C) 2001-2009 Neil Brown <neilb@suse.de>
*
*
* This program is free software; you can redistribute it and/or modify
* 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
+ * Email: <neilb@suse.de>
*/
-#include "mdctl.h"
+#include "mdadm.h"
-int Build(char *mddev, int mdfd, int chunk, int level,
- int raiddisks,
- int subdevs, char *subdev[])
+#define REGISTER_DEV _IO (MD_MAJOR, 1)
+#define START_MD _IO (MD_MAJOR, 2)
+#define STOP_MD _IO (MD_MAJOR, 3)
+
+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.
+ *
+ * For md_version >= 0.90.0 we call
+ * SET_ARRAY_INFO, ADD_NEW_DISK, RUN_ARRAY
+ *
+ */
+ int i;
+ int vers;
+ struct stat stb;
+ 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;
+
+ /* 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(dv->devname, &stb)) {
+ pr_err("Cannot find %s: %s\n",
+ dv->devname, strerror(errno));
+ return 1;
+ }
+ if ((stb.st_mode & S_IFMT) != S_IFBLK) {
+ pr_err("%s is not a block device.\n",
+ dv->devname);
+ 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);
+ if (mdfd < 0) {
+ map_unlock(&map);
+ return 1;
+ }
+ mddev = chosen_name;
+
+ map_update(&map, fd2devnm(mdfd), "none", uuid, chosen_name);
+ map_unlock(&map);
+
+ vers = md_get_version(mdfd);
+
+ /* looks Ok, go for it */
+ if (vers >= 9000) {
+ mdu_array_info_t array;
+ 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(mdfd, &stb)==0)
+ array.md_minor = minor(stb.st_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 (ioctl(mdfd, SET_ARRAY_INFO, &array)) {
+ pr_err("SET_ARRAY_INFO failed for %s: %s\n",
+ mddev, strerror(errno));
+ goto abort;
+ }
+ } else if (s->bitmap_file) {
+ pr_err("bitmaps not supported with this kernel\n");
+ 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) {
+ unsigned long long dsize;
+ int fd;
+ if (strcmp("missing", dv->devname) == 0)
+ continue;
+ if (stat(dv->devname, &stb)) {
+ pr_err("Weird: %s has disappeared.\n",
+ dv->devname);
+ goto abort;
+ }
+ if ((stb.st_mode & S_IFMT)!= S_IFBLK) {
+ pr_err("Weird: %s is no longer a block device.\n",
+ dv->devname);
+ 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);
+ if (vers >= 9000) {
+ mdu_disk_info_t disk;
+ disk.number = i;
+ disk.raid_disk = i;
+ disk.state = (1<<MD_DISK_SYNC) | (1<<MD_DISK_ACTIVE);
+ if (dv->writemostly == 1)
+ disk.state |= 1<<MD_DISK_WRITEMOSTLY;
+ disk.major = major(stb.st_rdev);
+ disk.minor = minor(stb.st_rdev);
+ if (ioctl(mdfd, ADD_NEW_DISK, &disk)) {
+ pr_err("ADD_NEW_DISK failed for %s: %s\n",
+ dv->devname, strerror(errno));
+ goto abort;
+ }
+ } else {
+ if (ioctl(mdfd, REGISTER_DEV, &stb.st_rdev)) {
+ pr_err("REGISTER_DEV failed for %s: %s.\n",
+ dv->devname, strerror(errno));
+ goto abort;
+ }
+ }
+ }
+ /* now to start it */
+ if (vers >= 9000) {
+ mdu_param_t param; /* not used by syscall */
+ 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 openned.",
+ s->bitmap_file);
+ goto abort;
+ }
+#endif
+ if (vers < 9003) {
+ major = BITMAP_MAJOR_HOSTENDIAN;
+#ifdef __BIG_ENDIAN
+ pr_err("Warning - bitmaps created on this kernel are not portable\n"
+ " between different architectures. Consider upgrading the Linux kernel.\n");
+#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 openned.",
+ 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, ¶m)) {
+ 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;
+ }
+ } else {
+ unsigned long arg;
+ arg=0;
+ while (s->chunk > 4096) {
+ arg++;
+ s->chunk >>= 1;
+ }
+ if (s->level == 0)
+ arg |= 0x20000;
+ else
+ arg |= 0x10000;
+ if (ioctl(mdfd, START_MD, arg)) {
+ pr_err("START_MD failed: %s\n",
+ strerror(errno));
+ goto abort;
+ }
+ }
+ if (c->verbose >= 0)
+ pr_err("array %s built and started.\n",
+ mddev);
+ wait_for(mddev, mdfd);
+ close(mdfd);
+ return 0;
+
+ abort:
+ if (vers >= 9000)
+ ioctl(mdfd, STOP_ARRAY, 0);
+ else
+ ioctl(mdfd, STOP_MD, 0);
+ close(mdfd);
+ return 1;
}
projects / thirdparty / mdadm.git / blobdiff