/*
* mdadm - manage Linux "md" devices aka RAID arrays.
*
- * Copyright (C) 2001-2002 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
#include "mdadm.h"
#include "md_u.h"
#include "md_p.h"
+#include <ctype.h>
-int Create(char *mddev, int mdfd,
- int chunk, int level, int layout, unsigned long size, int raiddisks, int sparedisks,
+int Create(struct supertype *st, char *mddev, int mdfd,
+ int chunk, int level, int layout, unsigned long long size, int raiddisks, int sparedisks,
+ char *name, char *homehost, int *uuid,
int subdevs, mddev_dev_t devlist,
- int runstop, int verbose, int force)
+ int runstop, int verbose, int force, int assume_clean,
+ char *bitmap_file, int bitmap_chunk, int write_behind, int delay)
{
/*
* Create a new raid array.
* abort.
*
* SET_ARRAY_INFO and ADD_NEW_DISK, and
- * if runstop==run, or raiddisks diskswere used,
+ * if runstop==run, or raiddisks disks were used,
* RUN_ARRAY
*/
unsigned long long minsize=0, maxsize=0;
mddev_dev_t dv;
int fail=0, warn=0;
struct stat stb;
- int first_missing = MD_SB_DISKS*2;
+ int first_missing = subdevs * 2;
+ int second_missing = subdevs * 2;
int missing_disks = 0;
- int insert_point = MD_SB_DISKS*2; /* where to insert a missing drive */
- void *super;
+ int insert_point = subdevs * 2; /* where to insert a missing drive */
int pass;
+ int vers;
+ int rv;
+ int bitmap_fd;
+ unsigned long long bitmapsize;
+ struct mdinfo *sra;
+ struct mdinfo info;
- mdu_array_info_t array;
-
+ int major_num = BITMAP_MAJOR_HI;
- if (md_get_version(mdfd) < 9000) {
+ memset(&info, 0, sizeof(info));
+
+ vers = md_get_version(mdfd);
+ if (vers < 9000) {
fprintf(stderr, Name ": Create requires md driver version 0.90.0 or later\n");
return 1;
+ } else {
+ mdu_array_info_t inf;
+ memset(&inf, 0, sizeof(inf));
+ ioctl(mdfd, GET_ARRAY_INFO, &inf);
+ if (inf.working_disks != 0) {
+ fprintf(stderr, Name ": another array by this name"
+ " is already running.\n");
+ return 1;
+ }
}
if (level == UnSet) {
- fprintf(stderr,
- Name ": a RAID level is needed to create an array.\n");
- return 1;
+ /* "ddf" metadata only supports one level - should possibly
+ * push this into metadata handler??
+ */
+ if (st && st->ss == &super_ddf)
+ level = LEVEL_CONTAINER;
}
- if (raiddisks < 1) {
+
+ if (level == UnSet) {
fprintf(stderr,
- Name ": a number of --raid-devices must be given to create an array\n");
+ Name ": a RAID level is needed to create an array.\n");
return 1;
}
if (raiddisks < 4 && level == 6) {
Name ": at least 2 raid-devices needed for level 4 or 5\n");
return 1;
}
- if (raiddisks+sparedisks > MD_SB_DISKS) {
+ if (level <= 0 && sparedisks) {
fprintf(stderr,
- Name ": too many devices requested: %d+%d > %d\n",
- raiddisks, sparedisks, MD_SB_DISKS);
+ Name ": This level does not support spare devices\n");
return 1;
}
if (subdevs > raiddisks+sparedisks) {
fprintf(stderr, Name ": You haven't given enough devices (real or missing) to create this array\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 set some defaults */
if (layout == UnSet)
break;
case 10:
layout = 0x102; /* near=2, far=1 */
- if (verbose)
+ if (verbose > 0)
fprintf(stderr,
Name ": layout defaults to n1\n");
break;
case 5:
case 6:
layout = map_name(r5layout, "default");
- if (verbose)
+ 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)
+ if (verbose > 0)
fprintf(stderr,
Name ": layout defaults to %s\n", map_num(faultylayout, layout));
break;
case 10:
case 6:
case 0:
- case -1: /* linear */
+ case LEVEL_LINEAR: /* linear */
if (chunk == 0) {
chunk = 64;
- if (verbose)
+ if (verbose > 0)
fprintf(stderr, Name ": chunk size defaults to 64K\n");
}
break;
- default: /* raid1, multipath */
+ case 1:
+ case LEVEL_FAULTY:
+ case LEVEL_MULTIPATH:
+ case LEVEL_CONTAINER:
if (chunk) {
chunk = 0;
- if (verbose)
+ if (verbose > 0)
fprintf(stderr, Name ": chunk size ignored for this level\n");
}
break;
+ default:
+ fprintf(stderr, Name ": unknown level %d\n", level);
+ return 1;
}
+ if (st && ! st->ss->validate_geometry(st, level, layout, raiddisks,
+ chunk, size, NULL, NULL))
+ return 1;
+
/* now look at the subdevs */
- array.active_disks = 0;
- array.working_disks = 0;
+ info.array.active_disks = 0;
+ info.array.working_disks = 0;
dnum = 0;
for (dv=devlist; dv; dv=dv->next, dnum++) {
char *dname = dv->devname;
- unsigned long dsize;
- unsigned long long ldsize, freesize;
- int fd;
+ unsigned long long freesize;
if (strcasecmp(dname, "missing")==0) {
if (first_missing > dnum)
first_missing = dnum;
+ if (second_missing > dnum && dnum > first_missing)
+ second_missing = dnum;
missing_disks ++;
continue;
}
- array.working_disks++;
+ info.array.working_disks++;
if (dnum < raiddisks)
- array.active_disks++;
- fd = open(dname, O_RDONLY|O_EXCL, 0);
- if (fd <0 ) {
- fprintf(stderr, Name ": Cannot open %s: %s\n",
- dname, strerror(errno));
- fail=1;
- continue;
- }
-#ifdef BLKGETSIZE64
- if (ioctl(fd, BLKGETSIZE64, &ldsize)==0)
- ;
- else
-#endif
- if (ioctl(fd, BLKGETSIZE, &dsize)) {
- fprintf(stderr, Name ": Cannot get size of %s: %s\n",
- dname, strerror(errno));
- fail = 1;
- close(fd);
- continue;
+ info.array.active_disks++;
+ if (st == NULL) {
+ struct createinfo *ci = conf_get_create_info();
+ if (ci)
+ st = ci->supertype;
}
- else {
- ldsize = dsize;
- dsize <<= 9;
+ if (st == NULL) {
+ /* Need to choose a default metadata, which is different
+ * depending on geometry of array.
+ */
+ int i;
+ char *name = "default";
+ for(i=0; !st && superlist[i]; i++) {
+ st = superlist[i]->match_metadata_desc(name);
+ if (st && !st->ss->validate_geometry
+ (st, level, layout, raiddisks,
+ chunk, size, dname, &freesize))
+ st = NULL;
+ }
+
+ if (!st) {
+ fprintf(stderr, Name ": device %s not suitable "
+ "for any style of array\n",
+ dname);
+ exit(2);
+ }
+ if (st->ss->major != 0 ||
+ st->minor_version != 90)
+ fprintf(stderr, Name ": Defaulting to version"
+ " %d.%d metadata\n",
+ st->ss->major,
+ st->minor_version);
+ } else {
+ if (!st->ss->validate_geometry(st, level, layout,
+ raiddisks,
+ chunk, size, dname,
+ &freesize)) {
+
+ fprintf(stderr,
+ Name ": %s is not suitable for "
+ "this array.\n",
+ dname);
+ fail = 1;
+ continue;
+ }
}
- if (ldsize < MD_RESERVED_SECTORS*2LL*512LL) {
- fprintf(stderr, Name ": %s is too small: %luK\n",
- dname, (unsigned long)(ldsize>>10));
- fail = 1;
- close(fd);
- continue;
+
+ freesize /= 2; /* convert to K */
+ if (chunk) {
+ /* round to chunk size */
+ freesize = freesize & ~(chunk-1);
}
- freesize = MD_NEW_SIZE_SECTORS((ldsize>>9));
- freesize /= 2;
if (size && freesize < size) {
fprintf(stderr, Name ": %s is smaller that given size."
- " %lluK < %luK + superblock\n", dname, freesize, size);
+ " %lluK < %lluK + metadata\n",
+ dname, freesize, size);
fail = 1;
- close(fd);
continue;
}
if (maxdisc == NULL || (maxdisc && freesize > maxsize)) {
mindisc = dname;
minsize = freesize;
}
- warn |= check_ext2(fd, dname);
- warn |= check_reiser(fd, dname);
- warn |= check_raid(fd, dname);
- close(fd);
+ if (runstop != 1 || verbose >= 0) {
+ int fd = open(dname, O_RDONLY, 0);
+ if (fd <0 ) {
+ fprintf(stderr, Name ": Cannot open %s: %s\n",
+ dname, strerror(errno));
+ fail=1;
+ continue;
+ }
+ warn |= check_ext2(fd, dname);
+ warn |= check_reiser(fd, dname);
+ warn |= check_raid(fd, dname);
+ close(fd);
+ }
}
if (fail) {
fprintf(stderr, Name ": create aborted\n");
fprintf(stderr, Name ": no size and no drives given - aborting create.\n");
return 1;
}
- if (level > 0) {
+ if (level > 0 || level == LEVEL_MULTIPATH || level == LEVEL_FAULTY) {
/* size is meaningful */
- if (minsize > 0x100000000ULL) {
- fprintf(stderr, Name ": devices too large for RAID level %d\n", level);
+ if (minsize > 0x100000000ULL && st->ss->major == 0) {
+ fprintf(stderr, Name ": devices too large for RAID level %d\n", level);
return 1;
}
size = minsize;
- if (verbose)
- fprintf(stderr, Name ": size set to %luK\n", size);
+ if (verbose > 0)
+ fprintf(stderr, Name ": size set to %lluK\n", size);
}
}
if (level > 0 && ((maxsize-size)*100 > maxsize)) {
- fprintf(stderr, Name ": largest drive (%s) exceed size (%luK) by more than 1%%\n",
- maxdisc, size);
+ if (runstop != 1 || verbose >= 0)
+ fprintf(stderr, Name ": largest drive (%s) exceed size (%lluK) by more than 1%%\n",
+ maxdisc, size);
warn = 1;
}
return 1;
}
} else {
- if (verbose)
+ if (verbose > 0)
fprintf(stderr, Name ": creation continuing despite oddities due to --run\n");
}
}
- /* If this is raid5, we want to configure the last active slot
+ /* If this is raid4/5, we want to configure the last active slot
* as missing, so that a reconstruct happens (faster than re-parity)
* FIX: Can we do this for raid6 as well?
*/
- if (force == 0 && first_missing >= raiddisks) {
+ if (assume_clean==0 && force == 0 && first_missing >= raiddisks) {
switch ( level ) {
+ case 4:
case 5:
insert_point = raiddisks-1;
sparedisks++;
- array.active_disks--;
+ info.array.active_disks--;
missing_disks++;
break;
default:
break;
}
}
-
+ /* For raid6, if creating with 1 missing drive, make a good drive
+ * into a spare, else the create will fail
+ */
+ if (assume_clean == 0 && force == 0 && first_missing < raiddisks &&
+ second_missing >= raiddisks && level == 6) {
+ insert_point = raiddisks - 1;
+ if (insert_point == first_missing)
+ insert_point--;
+ sparedisks ++;
+ info.array.active_disks--;
+ missing_disks++;
+ }
+
+ if (level <= 0 && first_missing != subdevs * 2) {
+ fprintf(stderr,
+ Name ": This level does not support missing devices\n");
+ return 1;
+ }
+
/* Ok, lets try some ioctls */
- array.level = level;
- array.size = size;
- array.raid_disks = raiddisks;
+ info.array.level = level;
+ info.array.size = size;
+ info.array.raid_disks = raiddisks;
/* The kernel should *know* what md_minor we are dealing
* with, but it chooses to trust me instead. Sigh
*/
- array.md_minor = 0;
+ info.array.md_minor = 0;
if (fstat(mdfd, &stb)==0)
- array.md_minor = minor(stb.st_rdev);
- array.not_persistent = 0;
- /*** FIX: Need to do something about RAID-6 here ***/
- if ( ( (level == 5) &&
+ info.array.md_minor = minor(stb.st_rdev);
+ info.array.not_persistent = 0;
+
+ if ( ( (level == 4 || level == 5) &&
(insert_point < raiddisks || first_missing < raiddisks) )
||
- ( level == 6 && missing_disks == 2)
+ ( level == 6 && (insert_point < raiddisks
+ || second_missing < raiddisks))
+ ||
+ assume_clean
)
- array.state = 1; /* clean, but one+ drive will be missing */
+ info.array.state = 1; /* clean, but one+ drive will be missing*/
else
- array.state = 0; /* not clean, but no errors */
+ info.array.state = 0; /* not clean, but no errors */
+
+ if (level == 10) {
+ /* for raid10, the bitmap size is the capacity of the array,
+ * which is array.size * raid_disks / ncopies;
+ * .. but convert to sectors.
+ */
+ int ncopies = ((layout>>8) & 255) * (layout & 255);
+ bitmapsize = (unsigned long long)size * raiddisks / ncopies * 2;
+/* printf("bms=%llu as=%d rd=%d nc=%d\n", bitmapsize, size, raiddisks, ncopies);*/
+ } else
+ bitmapsize = (unsigned long long)size * 2;
/* There is lots of redundancy in these disk counts,
* raid_disks is the most meaningful value
* So for now, we assume that all raid and spare
* devices will be given.
*/
- array.spare_disks=sparedisks;
- array.failed_disks=missing_disks;
- array.nr_disks = array.working_disks + array.failed_disks;
- array.layout = layout;
- array.chunk_size = chunk*1024;
+ info.array.spare_disks=sparedisks;
+ info.array.failed_disks=missing_disks;
+ info.array.nr_disks = info.array.working_disks
+ + info.array.failed_disks;
+ info.array.layout = layout;
+ info.array.chunk_size = chunk*1024;
+ info.array.major_version = st->ss->major;
+
+ if (name == NULL || *name == 0) {
+ /* base name on mddev */
+ /* /dev/md0 -> 0
+ * /dev/md_d0 -> d0
+ * /dev/md/1 -> 1
+ * /dev/md/d1 -> d1
+ * /dev/md/home -> home
+ * /dev/mdhome -> home
+ */
+ name = strrchr(mddev, '/');
+ if (name) {
+ name++;
+ if (strncmp(name, "md_d", 4)==0 &&
+ strlen(name) > 4 &&
+ isdigit(name[4]) &&
+ (name-mddev) == 5 /* /dev/ */)
+ name += 3;
+ else if (strncmp(name, "md", 2)==0 &&
+ strlen(name) > 2 &&
+ isdigit(name[2]) &&
+ (name-mddev) == 5 /* /dev/ */)
+ name += 2;
+ }
+ }
+ if (!st->ss->init_super(st, &info.array, size, name, homehost, uuid))
+ return 1;
+
+ if (bitmap_file && vers < 9003) {
+ major_num = BITMAP_MAJOR_HOSTENDIAN;
+#ifdef __BIG_ENDIAN
+ fprintf(stderr, Name ": Warning - bitmaps created on this kernel are not portable\n"
+ " between different architectured. Consider upgrading the Linux kernel.\n");
+#endif
+ }
+
+ if (bitmap_file && strcmp(bitmap_file, "internal")==0) {
+ if ((vers%100) < 2) {
+ fprintf(stderr, Name ": internal bitmaps not supported by this kernel.\n");
+ return 1;
+ }
+ if (!st->ss->add_internal_bitmap(st, &bitmap_chunk,
+ delay, write_behind,
+ bitmapsize, 1, major_num)) {
+ fprintf(stderr, Name ": Given bitmap chunk size not supported.\n");
+ return 1;
+ }
+ bitmap_file = NULL;
+ }
+
- if (ioctl(mdfd, SET_ARRAY_INFO, NULL)) {
+ sra = sysfs_read(mdfd, 0, 0);
+
+ if (st->ss->external) {
+ char ver[100];
+ strcat(strcpy(ver, "external:"), st->ss->text_version);
+ if ((vers % 100) < 2 ||
+ sra == NULL ||
+ sysfs_set_str(sra, NULL, "metadata_version",
+ ver) < 0) {
+ fprintf(stderr, Name ": This kernel does not "
+ "support external metadata.\n");
+ return 1;
+ }
+ rv = 0;
+ } else if ((vers % 100) >= 1) { /* can use different versions */
+ mdu_array_info_t inf;
+ memset(&inf, 0, sizeof(inf));
+ inf.major_version = st->ss->major;
+ inf.minor_version = st->minor_version;
+ rv = ioctl(mdfd, SET_ARRAY_INFO, &inf);
+ } else
+ rv = ioctl(mdfd, SET_ARRAY_INFO, NULL);
+ if (rv) {
fprintf(stderr, Name ": SET_ARRAY_INFO failed for %s: %s\n",
mddev, strerror(errno));
return 1;
}
- init_super0(&super, &array);
+ if (bitmap_file) {
+ int uuid[4];
+
+ st->ss->uuid_from_super(st, uuid);
+ if (CreateBitmap(bitmap_file, force, (char*)uuid, bitmap_chunk,
+ delay, write_behind,
+ bitmapsize,
+ major_num)) {
+ return 1;
+ }
+ bitmap_fd = open(bitmap_file, O_RDWR);
+ if (bitmap_fd < 0) {
+ fprintf(stderr, Name ": weird: %s cannot be openned\n",
+ bitmap_file);
+ return 1;
+ }
+ 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;
+ }
+ }
for (pass=1; pass <=2 ; pass++) {
dv=(dv->next)?(dv->next):moved_disk, dnum++) {
int fd;
struct stat stb;
- mdu_disk_info_t disk;
- disk.number = dnum;
+ info.disk.number = dnum;
if (dnum == insert_point) {
moved_disk = dv;
}
- disk.raid_disk = disk.number;
- if (disk.raid_disk < raiddisks)
- disk.state = 6; /* active and in sync */
+ info.disk.raid_disk = info.disk.number;
+ if (info.disk.raid_disk < raiddisks)
+ info.disk.state = (1<<MD_DISK_ACTIVE) |
+ (1<<MD_DISK_SYNC);
else
- disk.state = 0;
+ info.disk.state = 0;
+ if (dv->writemostly)
+ info.disk.state |= (1<<MD_DISK_WRITEMOSTLY);
+
if (dnum == insert_point ||
- strcasecmp(dv->devname, "missing")==0) {
- disk.major = 0;
- disk.minor = 0;
- disk.state = 1; /* faulty */
- } else {
- fd = open(dv->devname, O_RDONLY|O_EXCL, 0);
- if (fd < 0) {
- fprintf(stderr, Name ": failed to open %s after earlier success - aborting\n",
- dv->devname);
- return 1;
- }
- fstat(fd, &stb);
- disk.major = major(stb.st_rdev);
- disk.minor = minor(stb.st_rdev);
- close(fd);
+ strcasecmp(dv->devname, "missing")==0)
+ continue;
+
+ fd = open(dv->devname, O_RDWR|O_EXCL, 0);
+ if (fd < 0) {
+ fprintf(stderr, Name ": failed to open %s "
+ "after earlier success - aborting\n",
+ dv->devname);
+ return 1;
}
+ fstat(fd, &stb);
+ info.disk.major = major(stb.st_rdev);
+ info.disk.minor = minor(stb.st_rdev);
+
switch(pass){
case 1:
- add_to_super0(super, &disk);
+ remove_partitions(fd);
+ st->ss->add_to_super(st, &info.disk,
+ fd, dv->devname);
break;
case 2:
- write_init_super0(super, &disk, dv->devname);
+ close(fd);
- if (ioctl(mdfd, ADD_NEW_DISK, &disk)) {
- fprintf(stderr, Name ": ADD_NEW_DISK for %s failed: %s\n",
+ if (st->ss->external) {
+ char dv[100];
+ sprintf(dv, "%d:%d\n",
+ info.disk.major,
+ info.disk.minor);
+ sysfs_set_str(sra, NULL, "new_dev", dv);
+ /* FIXME check error */
+ /*FIXME find that device and set it up*/
+ } else if (ioctl(mdfd, ADD_NEW_DISK,
+ &info.disk)) {
+ fprintf(stderr,
+ Name ": ADD_NEW_DISK for %s "
+ "failed: %s\n",
dv->devname, strerror(errno));
- free(super);
+ st->ss->free_super(st);
return 1;
}
-
break;
}
if (dv == moved_disk && dnum != insert_point) break;
}
+ if (pass == 1)
+ st->ss->write_init_super(st);
}
- free(super);
+ st->ss->free_super(st);
/* param is not actually used */
- if (runstop == 1 || subdevs >= raiddisks) {
+ if (level == LEVEL_CONTAINER)
+ /* No need to start */
+ ;
+ else if (runstop == 1 || subdevs >= raiddisks) {
mdu_param_t param;
if (ioctl(mdfd, RUN_ARRAY, ¶m)) {
fprintf(stderr, Name ": RUN_ARRAY failed: %s\n",
strerror(errno));
- Manage_runstop(mddev, mdfd, -1);
+ Manage_runstop(mddev, mdfd, -1, 0);
return 1;
}
- fprintf(stderr, Name ": array %s started.\n", mddev);
+ if (verbose >= 0)
+ fprintf(stderr, Name ": array %s started.\n", mddev);
} else {
fprintf(stderr, Name ": not starting array - not enough devices.\n");
}
projects / thirdparty / mdadm.git / blobdiff