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installer: Wipe first bytes of partitions and disks before partitioning.

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This commit is contained in:
Michael Tremer
2014-08-12 14:57:23 +02:00
parent a8d8b5576c
commit d2f993a7dd
1 changed files with 41 additions and 2 deletions
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43
src/installer/hw.c
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@@ -505,9 +505,38 @@ unsigned long long hw_memory() {
return memory * 1024;
}
int hw_create_partitions(struct hw_destination* dest) {
char* cmd = NULL;
static int hw_zero_out_device(const char* path, int bytes) {
char block[512];
memset(block, 0, sizeof(block));
int blocks = bytes / sizeof(block);
int fd = open(path, O_WRONLY);
if (fd < 0)
return -1;
unsigned int bytes_written = 0;
while (blocks-- > 0) {
bytes_written += write(fd, block, sizeof(block));
}
fsync(fd);
close(fd);
return bytes_written;
}
int hw_create_partitions(struct hw_destination* dest) {
// Before we write a new partition table to the disk, we will erase
// the first couple of megabytes at the beginning of the device to
// get rid of all left other things like bootloaders and partition tables.
// This solves some problems when changing from MBR to GPT partitions or
// the other way around.
int r = hw_zero_out_device(dest->path, MB2BYTES(10));
if (r <= 0)
return r;
char* cmd = NULL;
asprintf(&cmd, "/usr/sbin/parted -s %s -a optimal", dest->path);
// Set partition type
@@ -798,10 +827,20 @@ int hw_setup_raid(struct hw_destination* dest) {
if (dest->disk1) {
asprintf(&cmd, "%s %s", cmd, dest->disk1->path);
// Clear all data at the beginning
r = hw_zero_out_device(dest->disk1->path, MB2BYTES(10));
if (r <= 0)
return r;
}
if (dest->disk2) {
asprintf(&cmd, "%s %s", cmd, dest->disk2->path);
// Clear all data at the beginning
r = hw_zero_out_device(dest->disk2->path, MB2BYTES(10));
if (r <= 0)
return r;
}
int r = mysystem(cmd);