*/
#include "mdctl.h"
+#include "md_u.h"
+#include "md_p.h"
int Create(char *mddev, int mdfd,
- int chunk, int level, int layout, int raiddisks, int sparedisks,
+ int chunk, int level, int layout, int size, int raiddisks, int sparedisks,
int subdevs, char *subdev[],
- int runstop)
+ int runstop, int verbose)
{
+ /*
+ * Create a new raid array.
+ *
+ * First check that necessary details are available
+ * (i.e. level, raid-disks)
+ *
+ * Then check each disk to see what might be on it
+ * and report anything interesting.
+ *
+ * If anything looks odd, and runstop not set,
+ * abort.
+ *
+ * SET_ARRAY_INFO and ADD_NEW_DISK, and
+ * if runstop==run, or raiddisks diskswere used,
+ * RUN_ARRAY
+ */
+ int minsize, maxsize;
+ int maxdisc= -1, mindisc = -1;
+ int i;
+ int fail=0, warn=0;
+
+ mdu_array_info_t array;
+ mdu_param_t param;
+
+
+ if (md_get_version(mdfd) < 9000) {
+ fprintf(stderr, Name ": Create requires md driver verison 0.90.0 or later\n");
+ return 1;
+ }
+ if (level == -10) {
+ 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");
+ return 1;
+ }
+ if (raiddisks+sparedisks > MD_SB_DISKS) {
+ fprintf(stderr,
+ Name ": too many discs 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;
+ }
+ /* now set some defaults */
+ if (layout == -1)
+ switch(level) {
+ default: /* no layout */
+ layout = 0;
+ break;
+ case 5:
+ layout = map_name(r5layout, "default");
+ if (verbose)
+ fprintf(stderr,
+ Name ": layout defaults to %s\n", map_num(r5layout, layout));
+ break;
+ }
+
+ if (chunk == 0) {
+ chunk = 64;
+ if (verbose)
+ fprintf(stderr, Name ": chunk size defaults to 64K\n");
+ }
+
+ /* 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);
+ if (fd <0 ) {
+ fprintf(stderr, Name ": Cannot open %s: %s\n",
+ dname, strerror(errno));
+ fail=1;
+ continue;
+ }
+ if (ioctl(fd, BLKGETSIZE, &dsize)) {
+ fprintf(stderr, Name ": Cannot get size of %s: %s\n",
+ dname, strerror(errno));
+ fail = 1;
+ close(fd);
+ continue;
+ }
+ if (dsize < MD_RESERVED_SECTORS*2) {
+ fprintf(stderr, Name ": %s is too small: %dK\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;
+ }
+ if (maxdisc< 0 || (maxdisc>=0 && freesize > maxsize)) {
+ maxdisc = i;
+ maxsize = freesize;
+ }
+ if (mindisc < 0 || (mindisc >=0 && freesize < minsize)) {
+ mindisc = i;
+ minsize = freesize;
+ }
+ 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");
+ 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 ((maxsize-size)*100 > maxsize) {
+ fprintf(stderr, Name ": largest drive (%s) exceed size (%dK) by more than 1%\n",
+ subdev[maxdisc], size);
+ warn = 1;
+ }
+
+ if (warn) {
+ 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");
+ }
+ }
+
+ /* Ok, lets try some ioctls */
+
+ array.level = level;
+ array.size = size;
+ array.nr_disks = raiddisks+sparedisks;
+ array.raid_disks = raiddisks;
+ array.md_minor = 0;
+ array.not_persistent = 0;
+ array.state = 0; /* not clean, but no errors */
+ array.active_disks=0;
+ array.working_disks=0;
+ array.spare_disks=0;
+ array.failed_disks=0;
+ 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]);
+ return 1;
+ }
+ fstat(fd, &stb);
+ disk.number = i;
+ disk.raid_disk = i;
+ disk.state = 6; /* active and in sync */
+ 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\b",
+ subdev[i], strerror(errno));
+ return 1;
+ }
+ }
+
+ /* param is not actually used */
+ if (runstop == 1 || subdevs >= raiddisks) {
+ if (ioctl(mdfd, RUN_ARRAY, ¶m)) {
+ fprintf(stderr, Name ": RUN_ARRAY failed: %s\n",
+ strerror(errno));
+ return 1;
+ }
+ fprintf(stderr, Name ": array %s started.\n", mddev);
+ } else {
+ fprintf(stderr, Name ": not starting array - not enough discs.\n");
+ }
+ return 0;
}
projects / thirdparty / mdadm.git / blobdiff