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Grow: Fix linear-growth when devices are not all the same size. 

If we add a device to a linear array which is a difference size
to the other devices in the array then, for v1.x metadata, we need to
make sure the size is correctly reflected in the superblock.
This commit is contained in:
NeilBrown 2008-10-15 14:34:18 +11:00
parent e4965ef846
commit 1c6cb603fa
1 changed files with 20 additions and 1 deletions
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21
super1.c
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@ -599,7 +599,7 @@ static int update_super1(struct supertype *st, struct mdinfo *info,
}
if (strcmp(update, "linear-grow-new") == 0) {
int i;
int rfd;
int rfd, fd;
int max = __le32_to_cpu(sb->max_dev);
for (i=0 ; i < max ; i++)
@ -620,6 +620,25 @@ static int update_super1(struct supertype *st, struct mdinfo *info,
sb->dev_roles[i] =
__cpu_to_le16(info->disk.raid_disk);
fd = open(devname, O_RDONLY);
if (fd >= 0) {
unsigned long long ds;
get_dev_size(fd, devname, &ds);
close(fd);
ds >>= 9;
if (__le64_to_cpu(sb->super_offset) <
__le64_to_cpu(sb->data_offset)) {
sb->data_size = __cpu_to_le64(
ds - __le64_to_cpu(sb->data_offset));
} else {
ds -= 8*2;
ds &= ~(unsigned long long)(4*2-1);
sb->super_offset = __cpu_to_le64(ds);
sb->data_size = __cpu_to_le64(
ds - __le64_to_cpu(sb->data_offset));
}
}
}
if (strcmp(update, "linear-grow-update") == 0) {
sb->raid_disks = __cpu_to_le32(info->array.raid_disks);