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authorNeil Brown <neilb@suse.de>2001-07-26 07:00:09 +0000
committerNeil Brown <neilb@suse.de>2001-07-26 07:00:09 +0000
commit82b27616de634964db1a71bd5d9813db71e391a1 (patch)
tree310a2ed60dbb0903c73ba261914da269e9ec9072 /Build.c
parent682c705194a869b882cd710d5f996142912db390 (diff)
downloadmdadm-82b27616de634964db1a71bd5d9813db71e391a1.tar.gz
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mdctl-v0.4mdctl-v0.4
Diffstat (limited to 'Build.c')
-rw-r--r--Build.c133
1 files changed, 133 insertions, 0 deletions
diff --git a/Build.c b/Build.c
index bcad0a6..40b631f 100644
--- a/Build.c
+++ b/Build.c
@@ -29,8 +29,141 @@
#include "mdctl.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[])
{
+ /* 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;
+ if (raiddisks != subdevs) {
+ fprintf(stderr, Name ": requested %d devices in array but listed %d\n",
+ raiddisks, subdevs);
+ return 1;
+ }
+
+ /* scan all devices, make sure they really are block devices */
+ for (i=0; i<subdevs; i++) {
+ if (stat(subdev[i], &stb)) {
+ fprintf(stderr, Name ": Cannot find %s: %s\n",
+ subdev[i], strerror(errno));
+ return 1;
+ }
+ if ((stb.st_mode & S_IFMT) != S_IFBLK) {
+ fprintf(stderr, Name ": %s is not a block device.\n",
+ subdev[i]);
+ return 1;
+ }
+ }
+
+ vers = md_get_version(mdfd);
+
+ /* looks Ok, go for it */
+ if (vers >= 90000) {
+ 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 = 0;
+ array.state = 0; /* not clean, but no errors */
+ array.active_disks = raiddisks;
+ array.working_disks = raiddisks;
+ array.spare_disks = 0;
+ array.failed_disks = 0;
+ 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;
+ }
+ }
+ /* 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]);
+ goto abort;
+ }
+ if ((stb.st_rdev & S_IFMT)!= S_IFBLK) {
+ fprintf(stderr, Name ": Wierd: %s is no longer a block device.\n",
+ subdev[i]);
+ goto abort;
+ }
+ if (vers> 90000) {
+ 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);
+ if (ioctl(mdfd, ADD_NEW_DISK, &disk)) {
+ fprintf(stderr, Name ": ADD_NEW_DISK failed for %s: %s\n",
+ subdev[i], 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));
+ goto abort;
+ }
+ }
+ }
+ /* now to start it */
+ if (vers > 90000) {
+ mdu_param_t param; /* not used by syscall */
+ if (ioctl(mdfd, RUN_ARRAY, param)) {
+ fprintf(stderr, Name ": RUN_ARRAY failed: %s\n",
+ strerror(errno));
+ goto abort;
+ }
+ } else {
+ int 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;
+ }
+ }
+ fprintf(stderr, Name ": array %s built and started.\n",
+ mddev);
+ return 0;
+
+ abort:
+ if (vers > 900000)
+ ioctl(mdfd, STOP_ARRAY, 0);
+ else
+ ioctl(mdfd, STOP_MD, 0);
+ return 1;
+
}
+