libfdisk: fix fdisk_reread_changes() for extended partitions
Linux kernel assumes only 1KiB extended partition to avoid overlapping with nested logical partitions. We need to follow this rule for BLKPG_ADD_PARTITION. Addresses: https://github.com/karelzak/util-linux/issues/1112 Signed-off-by: Karel Zak <kzak@redhat.com>
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@ -939,10 +939,21 @@ int fdisk_reread_changes(struct fdisk_context *cxt, struct fdisk_table *org)
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}
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}
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for (i = 0; i < nadds; i++) {
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uint64_t sz;
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pa = add[i];
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sz = pa->size * ssf;
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DBG(PART, ul_debugobj(pa, "#%zu calling BLKPG_ADD_PARTITION", pa->partno));
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if (fdisk_is_label(cxt, DOS) && fdisk_partition_is_container(pa))
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/* Let's follow the Linux kernel and reduce
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* DOS extended partition to 1 or 2 sectors.
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*/
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sz = min(sz, (uint64_t) 2);
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if (partx_add_partition(cxt->dev_fd, pa->partno + 1,
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pa->start * ssf, pa->size * ssf) != 0) {
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pa->start * ssf, sz) != 0) {
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fdisk_warn(cxt, _("Failed to add partition %zu to system"), pa->partno + 1);
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err++;
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}
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