/*
- * 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) 2001-2002 Neil Brown <neilb@cse.unsw.edu.au>
*
*
* This program is free software; you can redistribute it and/or modify
* Australia
*/
-#include "mdctl.h"
+#include "mdadm.h"
#include "md_u.h"
#include "md_p.h"
int Create(char *mddev, int mdfd,
- int chunk, int level, int layout, int size, int raiddisks, int sparedisks,
- int subdevs, char *subdev[],
- int runstop, int verbose)
+ int chunk, int level, int layout, unsigned long size, int raiddisks, int sparedisks,
+ int subdevs, mddev_dev_t devlist,
+ int runstop, int verbose, int force)
{
/*
* Create a new raid array.
* if runstop==run, or raiddisks diskswere used,
* RUN_ARRAY
*/
- int minsize, maxsize;
- int maxdisc= -1, mindisc = -1;
- int i;
+ unsigned long minsize=0, maxsize=0;
+ char *mindisc = NULL;
+ char *maxdisc = NULL;
+ int dnum;
+ mddev_dev_t dv;
int fail=0, warn=0;
struct stat stb;
+ int first_missing = MD_SB_DISKS*2;
+ int missing_disks = 0;
+ int insert_point = MD_SB_DISKS*2; /* where to insert a missing drive */
+ mddev_dev_t moved_disk = NULL; /* the disk that was moved out of the insert point */
mdu_array_info_t array;
if (md_get_version(mdfd) < 9000) {
- fprintf(stderr, Name ": Create requires md driver verison 0.90.0 or later\n");
- return 1;
+ fprintf(stderr, Name ": Create requires md driver version 0.90.0 or later\n");
+ return 1;
}
- if (level == -10) {
+ if (level == UnSet) {
fprintf(stderr,
Name ": a RAID level is needed to create an array.\n");
return 1;
}
if (raiddisks < 1) {
fprintf(stderr,
- Name ": a number of --raid-disks must be given to create an array\n");
+ Name ": a number of --raid-devices must be given to create an array\n");
+ return 1;
+ }
+ if (raiddisks < 4 && level == 6) {
+ fprintf(stderr,
+ Name ": at least 4 raid-devices needed for level 6\n");
+ return 1;
+ }
+ if (raiddisks > 256 && level == 6) {
+ fprintf(stderr,
+ Name ": no more than 256 raid-devices supported for level 6\n");
+ return 1;
+ }
+ if (raiddisks < 2 && level >= 4) {
+ fprintf(stderr,
+ Name ": at least 2 raid-devices needed for level 4 or 5\n");
return 1;
}
if (raiddisks+sparedisks > MD_SB_DISKS) {
fprintf(stderr,
- Name ": too many discs requested: %d+%d > %d\n",
+ Name ": too many devices requested: %d+%d > %d\n",
raiddisks, sparedisks, MD_SB_DISKS);
return 1;
}
if (subdevs > raiddisks+sparedisks) {
- fprintf(stderr, Name ": You have listed more disks (%d) than are in the array(%d)!\n", subdevs, raiddisks+sparedisks);
- return 1;
+ fprintf(stderr, Name ": You have listed more devices (%d) than are in the array(%d)!\n", subdevs, raiddisks+sparedisks);
+ 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;
}
+
/* now set some defaults */
- if (layout == -1)
+ if (layout == UnSet)
switch(level) {
default: /* no layout */
layout = 0;
break;
case 5:
+ case 6:
layout = map_name(r5layout, "default");
if (verbose)
fprintf(stderr,
break;
}
- if (chunk == 0) {
- chunk = 64;
- if (verbose)
- fprintf(stderr, Name ": chunk size defaults to 64K\n");
+ switch(level) {
+ case 4:
+ case 5:
+ case 6:
+ case 0:
+ case -1: /* linear */
+ if (chunk == 0) {
+ chunk = 64;
+ if (verbose)
+ fprintf(stderr, Name ": chunk size defaults to 64K\n");
+ }
+ break;
+ default: /* raid1, multipath */
+ if (chunk) {
+ chunk = 0;
+ if (verbose)
+ fprintf(stderr, Name ": chunk size ignored for this level\n");
+ }
+ break;
}
/* now look at the subdevs */
- for (i=0; i<subdevs; i++) {
- char *dname = subdev[i];
- int dsize, freesize;
- int fd = open(dname, O_RDONLY, 0);
+ array.active_disks = 0;
+ array.working_disks = 0;
+ dnum = 0;
+ for (dv=devlist; dv; dv=dv->next, dnum++) {
+ char *dname = dv->devname;
+ unsigned long dsize, freesize;
+ int fd;
+ if (strcasecmp(dname, "missing")==0) {
+ if (first_missing > dnum)
+ first_missing = dnum;
+ missing_disks ++;
+ continue;
+ }
+ array.working_disks++;
+ if (dnum < raiddisks)
+ array.active_disks++;
+ fd = open(dname, O_RDONLY, 0);
if (fd <0 ) {
fprintf(stderr, Name ": Cannot open %s: %s\n",
dname, strerror(errno));
continue;
}
if (dsize < MD_RESERVED_SECTORS*2) {
- fprintf(stderr, Name ": %s is too small: %dK\n",
- dname, dsize/2);
- fail = 1;
- close(fd);
- continue;
+ fprintf(stderr, Name ": %s is too small: %luK\n",
+ dname, dsize/2);
+ fail = 1;
+ close(fd);
+ continue;
}
freesize = MD_NEW_SIZE_SECTORS(dsize);
freesize /= 2;
if (size && freesize < size) {
- fprintf(stderr, Name ": %s is smaller that given size."
- " %dK < %dK + superblock\n", dname, freesize, size);
- fail = 1;
- close(fd);
- continue;
+ fprintf(stderr, Name ": %s is smaller that given size."
+ " %luK < %luK + superblock\n", dname, freesize, size);
+ fail = 1;
+ close(fd);
+ continue;
}
- if (maxdisc< 0 || (maxdisc>=0 && freesize > maxsize)) {
- maxdisc = i;
- maxsize = freesize;
+ if (maxdisc == NULL || (maxdisc && freesize > maxsize)) {
+ maxdisc = dname;
+ maxsize = freesize;
}
- if (mindisc < 0 || (mindisc >=0 && freesize < minsize)) {
- mindisc = i;
- minsize = freesize;
+ if (mindisc ==NULL || (mindisc && freesize < minsize)) {
+ mindisc = dname;
+ minsize = freesize;
}
warn |= check_ext2(fd, dname);
warn |= check_reiser(fd, dname);
close(fd);
}
if (fail) {
- fprintf(stderr, Name ": create aborted\n");
- return 1;
+ fprintf(stderr, Name ": create aborted\n");
+ return 1;
}
if (size == 0) {
- if (mindisc == -1) {
- fprintf(stderr, Name ": no size and no drives given - aborting create.\n");
- return 1;
- }
- size = minsize;
- if (verbose)
- fprintf(stderr, Name ": size set to %dK\n", size);
+ if (mindisc == NULL) {
+ fprintf(stderr, Name ": no size and no drives given - aborting create.\n");
+ return 1;
+ }
+ size = minsize;
+ if (verbose && level>0)
+ fprintf(stderr, Name ": size set to %luK\n", size);
}
- if ((maxsize-size)*100 > maxsize) {
- fprintf(stderr, Name ": largest drive (%s) exceed size (%dK) by more than 1%\n",
- subdev[maxdisc], size);
- warn = 1;
+ if (level >= 1 && ((maxsize-size)*100 > maxsize)) {
+ fprintf(stderr, Name ": largest drive (%s) exceed size (%luK) by more than 1%%\n",
+ maxdisc, size);
+ warn = 1;
}
if (warn) {
- if (runstop!= 1) {
- if (!ask("Continue creating array? ")) {
- fprintf(stderr, Name ": create aborted.\n");
- return 1;
+ if (runstop!= 1) {
+ if (!ask("Continue creating array? ")) {
+ fprintf(stderr, Name ": create aborted.\n");
+ return 1;
+ }
+ } else {
+ if (verbose)
+ fprintf(stderr, Name ": creation continuing despite oddities due to --run\n");
}
- } else {
- if (verbose)
- fprintf(stderr, Name ": creation continuing despite oddities due to --run\n");
- }
}
+ /* If this is raid5, 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) {
+ switch ( level ) {
+ case 5:
+ insert_point = raiddisks-1;
+ sparedisks++;
+ array.active_disks--;
+ missing_disks++;
+ break;
+ default:
+ break;
+ }
+ }
+
/* Ok, lets try some ioctls */
array.level = level;
array.size = size;
- array.nr_disks = raiddisks+sparedisks+(level==4||level==5);
array.raid_disks = raiddisks;
/* The kernel should *know* what md_minor we are dealing
* with, but it chooses to trust me instead. Sigh
if (fstat(mdfd, &stb)==0)
array.md_minor = MINOR(stb.st_rdev);
array.not_persistent = 0;
- if (level == 4 || level == 5)
- array.state = 1; /* clean, but one drive will be missing */
+ /*** FIX: Need to do something about RAID-6 here ***/
+ if ( (level == 5 || level == 6) &&
+ (insert_point < raiddisks || first_missing < raiddisks) )
+ array.state = 1; /* clean, but one+ drive will be missing */
else
- array.state = 0; /* not clean, but no errors */
+ array.state = 0; /* not clean, but no errors */
/* 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.active_disks=raiddisks-(level==4||level==5);
- array.working_disks=raiddisks+sparedisks;
- array.spare_disks=sparedisks + (level==4||level==5);
- array.failed_disks=0;
+ 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;
if (ioctl(mdfd, SET_ARRAY_INFO, &array)) {
- fprintf(stderr, Name ": SET_ARRAY_INFO failed for %s: %s\n",
- mddev, strerror(errno));
- return 1;
- }
-
- for (i=0; i<subdevs; i++) {
- int fd = open(subdev[i], O_RDONLY, 0);
- struct stat stb;
- mdu_disk_info_t disk;
- if (fd < 0) {
- fprintf(stderr, Name ": failed to open %s after earlier success - aborting\n",
- subdev[i]);
+ fprintf(stderr, Name ": SET_ARRAY_INFO failed for %s: %s\n",
+ mddev, strerror(errno));
return 1;
- }
- fstat(fd, &stb);
- disk.number = i;
- if ((level==4 || level==5) &&
- disk.number >= raiddisks-1)
- disk.number++;
- disk.raid_disk = disk.number;
- if (disk.raid_disk < raiddisks)
- disk.state = 6; /* active and in sync */
- else
- disk.state = 0;
- disk.major = MAJOR(stb.st_rdev);
- disk.minor = MINOR(stb.st_rdev);
- close(fd);
- if (ioctl(mdfd, ADD_NEW_DISK, &disk)) {
- fprintf(stderr, Name ": ADD_NEW_DISK for %s failed: %s\n",
- subdev[i], strerror(errno));
- return 1;
- }
}
-
- /* hack */
- if (level==4 || level==5) {
+
+ for (dnum=0, dv = devlist ; dv ; dv=(dv->next)?(dv->next):moved_disk, dnum++) {
+ int fd;
+ struct stat stb;
mdu_disk_info_t disk;
- disk.number = raiddisks-1;
+
+ disk.number = dnum;
+ if (dnum == insert_point) {
+ moved_disk = dv;
+ }
disk.raid_disk = disk.number;
- disk.state = 1; /* faulty */
- disk.major = disk.minor = 0;
- ioctl(mdfd,ADD_NEW_DISK, &disk);
+ if (disk.raid_disk < raiddisks)
+ disk.state = 6; /* active and in sync */
+ else
+ disk.state = 0;
+ 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, 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);
+ }
+ if (ioctl(mdfd, ADD_NEW_DISK, &disk)) {
+ fprintf(stderr, Name ": ADD_NEW_DISK for %s failed: %s\n",
+ dv->devname, strerror(errno));
+ return 1;
+ }
+ if (dv == moved_disk && dnum != insert_point) break;
}
/* param is not actually used */
if (ioctl(mdfd, RUN_ARRAY, ¶m)) {
fprintf(stderr, Name ": RUN_ARRAY failed: %s\n",
strerror(errno));
+ Manage_runstop(mddev, mdfd, -1);
return 1;
}
fprintf(stderr, Name ": array %s started.\n", mddev);
} else {
- fprintf(stderr, Name ": not starting array - not enough discs.\n");
+ fprintf(stderr, Name ": not starting array - not enough devices.\n");
}
return 0;
}
projects / thirdparty / mdadm.git / blobdiff