/*
- * 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"
#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 raiddisks,
- int subdevs, char *subdev[])
+int Build(char *mddev, int chunk, int level, int layout,
+ int raiddisks, mddev_dev_t devlist, int assume_clean,
+ char *bitmap_file, int bitmap_chunk, int write_behind,
+ int delay, int verbose, int autof, unsigned long long size)
{
/* Build a linear or raid0 arrays without superblocks
* We cannot really do any checks, we just do it.
int i;
int vers;
struct stat stb;
- if (raiddisks != subdevs) {
- fprintf(stderr, Name ": requested %d devices in array but listed %d\n",
- raiddisks, subdevs);
- return 1;
- }
+ int subdevs = 0, missing_disks = 0;
+ mddev_dev_t 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 (i=0; i<subdevs; i++) {
- if (stat(subdev[i], &stb)) {
+ 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",
- subdev[i], strerror(errno));
+ dv->devname, strerror(errno));
return 1;
}
if ((stb.st_mode & S_IFMT) != S_IFBLK) {
fprintf(stderr, Name ": %s is not a block device.\n",
- subdev[i]);
+ 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;
+ }
+
+ /* We need to create the device. It can have no name. */
+ map_lock(&map);
+ mdfd = create_mddev(mddev, NULL, autof, LOCAL,
+ chosen_name);
+ if (mdfd < 0) {
+ map_unlock(&map);
+ return 1;
+ }
+ mddev = chosen_name;
+
+ map_update(&map, fd2devnum(mdfd), "none", uuid, chosen_name);
+ map_unlock(&map);
+
vers = md_get_version(mdfd);
-
+
/* looks Ok, go for it */
- if (vers >= 90000) {
+ if (vers >= 9000) {
mdu_array_info_t array;
array.level = level;
- array.size = 0;
+ array.size = size;
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 = 0;
+ array.md_minor = minor(stb.st_rdev);
+ array.not_persistent = 1;
array.state = 0; /* not clean, but no errors */
- array.active_disks = raiddisks;
- array.working_disks = raiddisks;
+ 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 = 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;
+ goto abort;
}
+ } else if (bitmap_file) {
+ fprintf(stderr, Name ": bitmaps not supported with this kernel\n");
+ goto abort;
+ }
+
+ if (bitmap_file && level <= 0) {
+ fprintf(stderr, Name ": bitmaps not meaningful with level %s\n",
+ map_num(pers, level)?:"given");
+ goto abort;
}
/* now add the devices */
- for (i=0; i<subdevs; i++) {
- if (stat(subdev[i], &stb)) {
- fprintf(stderr, Name ": Wierd: %s has disappeared.\n",
- subdev[i]);
+ 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_rdev & S_IFMT)!= S_IFBLK) {
+ if ((stb.st_mode & S_IFMT)!= S_IFBLK) {
fprintf(stderr, Name ": Wierd: %s is no longer a block device.\n",
- subdev[i]);
+ 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 (vers> 90000) {
+ 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 = 6;
- disk.major = MAJOR(stb.st_rdev);
- disk.minor = MINOR(stb.st_rdev);
+ 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)) {
fprintf(stderr, Name ": ADD_NEW_DISK failed for %s: %s\n",
- subdev[i], strerror(errno));
+ dv->devname, strerror(errno));
goto abort;
}
} else {
if (ioctl(mdfd, REGISTER_DEV, &stb.st_rdev)) {
- fprintf(stderr, Name ": REGISTER_DEV failed for %s.\n",
- subdev[i], strerror(errno));
+ fprintf(stderr, Name ": REGISTER_DEV failed for %s: %s.\n",
+ dv->devname, strerror(errno));
goto abort;
}
}
}
/* now to start it */
- if (vers > 90000) {
+ if (vers >= 9000) {
mdu_param_t param; /* not used by syscall */
- if (ioctl(mdfd, RUN_ARRAY, param)) {
+ 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);
+ goto abort;
+ }
+#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)) {
+ goto abort;
+ }
+ bitmap_fd = open(bitmap_file, O_RDWR);
+ if (bitmap_fd < 0) {
+ fprintf(stderr, Name ": %s cannot be openned.",
+ bitmap_file);
+ goto abort;
+ }
+ }
+ 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));
+ goto abort;
+ }
+ }
+ }
+ if (ioctl(mdfd, RUN_ARRAY, ¶m)) {
fprintf(stderr, Name ": RUN_ARRAY failed: %s\n",
strerror(errno));
goto abort;
}
} else {
- int arg;
+ unsigned long arg;
arg=0;
while (chunk > 4096) {
arg++;
goto abort;
}
}
- fprintf(stderr, Name ": array %s built and started.\n",
- mddev);
+ if (verbose >= 0)
+ fprintf(stderr, Name ": array %s built and started.\n",
+ mddev);
+ wait_for(mddev, mdfd);
+ close(mdfd);
return 0;
abort:
- if (vers > 900000)
+ if (vers >= 9000)
ioctl(mdfd, STOP_ARRAY, 0);
else
ioctl(mdfd, STOP_MD, 0);
+ close(mdfd);
return 1;
-
}
-
projects / thirdparty / mdadm.git / blobdiff