/*
- * 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) 2001-2006 Neil Brown <neilb@suse.de>
*
*
* This program is free software; you can redistribute it and/or modify
* Australia
*/
-#include "mdctl.h"
+#include "mdadm.h"
-int Build(char *mddev, int mdfd, int chunk, int level,
+#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, int mdfd, int chunk, int level, int layout,
int raiddisks,
- int subdevs, char *subdev[])
+ mddev_dev_t devlist, int assume_clean,
+ char *bitmap_file, int bitmap_chunk, int write_behind, int delay, int verbose)
{
+ /* 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;
+ mddev_dev_t dv;
+ int bitmap_fd;
+ unsigned long long size = ~0ULL;
+ unsigned long long bitmapsize;
+
+ /* 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)) {
+ fprintf(stderr, Name ": Cannot find %s: %s\n",
+ dv->devname, strerror(errno));
+ return 1;
+ }
+ if ((stb.st_mode & S_IFMT) != S_IFBLK) {
+ fprintf(stderr, Name ": %s is not a block device.\n",
+ dv->devname);
+ return 1;
+ }
+ }
+
+ if (raiddisks != subdevs) {
+ fprintf(stderr, Name ": requested %d devices in array but listed %d\n",
+ raiddisks, subdevs);
+ return 1;
+ }
+
+ if (layout == UnSet)
+ switch(level) {
+ default: /* no layout */
+ layout = 0;
+ break;
+ case 10:
+ layout = 0x102; /* near=2, far=1 */
+ if (verbose > 0)
+ fprintf(stderr,
+ Name ": layout defaults to n1\n");
+ break;
+ case 5:
+ case 6:
+ layout = map_name(r5layout, "default");
+ if (verbose > 0)
+ fprintf(stderr,
+ Name ": layout defaults to %s\n", map_num(r5layout, layout));
+ break;
+ case LEVEL_FAULTY:
+ layout = map_name(faultylayout, "default");
+
+ if (verbose > 0)
+ fprintf(stderr,
+ Name ": layout defaults to %s\n", map_num(faultylayout, layout));
+ break;
+ }
+
+
+ vers = md_get_version(mdfd);
+
+ /* looks Ok, go for it */
+ if (vers >= 9000) {
+ mdu_array_info_t array;
+ array.level = level;
+ array.size = 0;
+ array.nr_disks = raiddisks;
+ array.raid_disks = 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 (assume_clean)
+ array.state |= 1;
+ array.active_disks = raiddisks - missing_disks;
+ array.working_disks = raiddisks - missing_disks;
+ array.spare_disks = 0;
+ array.failed_disks = missing_disks;
+ if (chunk == 0 && (level==0 || level==LEVEL_LINEAR))
+ chunk = 64;
+ array.chunk_size = chunk*1024;
+ array.layout = layout;
+ if (ioctl(mdfd, SET_ARRAY_INFO, &array)) {
+ fprintf(stderr, Name ": SET_ARRAY_INFO failed for %s: %s\n",
+ mddev, strerror(errno));
+ return 1;
+ }
+ } else if (bitmap_file) {
+ fprintf(stderr, Name ": bitmaps not supported with this kernel\n");
+ return 1;
+ }
+
+ if (bitmap_file && level <= 0) {
+ fprintf(stderr, Name ": bitmaps not meaningful with level %s\n",
+ map_num(pers, level)?:"given");
+ return 1;
+ }
+ /* 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)) {
+ fprintf(stderr, Name ": Weird: %s has disappeared.\n",
+ dv->devname);
+ goto abort;
+ }
+ if ((stb.st_mode & S_IFMT)!= S_IFBLK) {
+ fprintf(stderr, Name ": Wierd: %s is no longer a block device.\n",
+ dv->devname);
+ goto abort;
+ }
+ fd = open(dv->devname, O_RDONLY|O_EXCL);
+ if (fd < 0) {
+ fprintf(stderr, Name ": Cannot open %s: %s\n",
+ dv->devname, strerror(errno));
+ goto abort;
+ }
+ if (get_dev_size(fd, NULL, &dsize) &&
+ (size == 0 || dsize < size))
+ 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)
+ 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)) {
+ fprintf(stderr, Name ": ADD_NEW_DISK failed for %s: %s\n",
+ dv->devname, strerror(errno));
+ goto abort;
+ }
+ } else {
+ if (ioctl(mdfd, REGISTER_DEV, &stb.st_rdev)) {
+ fprintf(stderr, Name ": 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 (bitmap_file) {
+ bitmap_fd = open(bitmap_file, O_RDWR);
+ if (bitmap_fd < 0) {
+ int major = BITMAP_MAJOR_HI;
+#if 0
+ if (bitmap_chunk == UnSet) {
+ fprintf(stderr, Name ": %s cannot be openned.",
+ bitmap_file);
+ return 1;
+ }
+#endif
+ if (vers < 9003) {
+ major = BITMAP_MAJOR_HOSTENDIAN;
+#ifdef __BIG_ENDIAN
+ fprintf(stderr, Name ": Warning - bitmaps created on this kernel are not portable\n"
+ " between different architectures. Consider upgrading the Linux kernel.\n");
+#endif
+ }
+ bitmapsize = size>>9; /* FIXME wrong for RAID10 */
+ if (CreateBitmap(bitmap_file, 1, NULL, bitmap_chunk,
+ delay, write_behind, bitmapsize, major)) {
+ return 1;
+ }
+ bitmap_fd = open(bitmap_file, O_RDWR);
+ if (bitmap_fd < 0) {
+ fprintf(stderr, Name ": %s cannot be openned.",
+ bitmap_file);
+ return 1;
+ }
+ }
+ if (bitmap_fd >= 0) {
+ if (ioctl(mdfd, SET_BITMAP_FILE, bitmap_fd) < 0) {
+ fprintf(stderr, Name ": Cannot set bitmap file for %s: %s\n",
+ mddev, strerror(errno));
+ return 1;
+ }
+ }
+ }
+ if (ioctl(mdfd, RUN_ARRAY, ¶m)) {
+ fprintf(stderr, Name ": RUN_ARRAY failed: %s\n",
+ strerror(errno));
+ goto abort;
+ }
+ } else {
+ unsigned long arg;
+ arg=0;
+ while (chunk > 4096) {
+ arg++;
+ chunk >>= 1;
+ }
+ if (level == 0)
+ chunk |= 0x20000;
+ else chunk |= 0x10000;
+ if (ioctl(mdfd, START_MD, arg)) {
+ fprintf(stderr, Name ": START_MD failed: %s\n",
+ strerror(errno));
+ goto abort;
+ }
+ }
+ if (verbose >= 0)
+ fprintf(stderr, Name ": array %s built and started.\n",
+ mddev);
+ return 0;
+
+ abort:
+ if (vers >= 9000)
+ ioctl(mdfd, STOP_ARRAY, 0);
+ else
+ ioctl(mdfd, STOP_MD, 0);
+ return 1;
}
projects / thirdparty / mdadm.git / blobdiff