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| author | Karel Zak | 2014-11-20 13:28:41 +0100 |
|---|---|---|
| committer | Karel Zak | 2014-11-20 13:28:41 +0100 |
| commit | 9146a00823925f318fb7b71f0db0feb0d71d06ba (patch) | |
| tree | f7ef0bdda722db321b343be9629197adc7d6c5f0 | |
| parent | libfdisk: (dos) allow to maximize partition (diff) | |
| download | kernel-qcow2-util-linux-9146a00823925f318fb7b71f0db0feb0d71d06ba.tar.gz kernel-qcow2-util-linux-9146a00823925f318fb7b71f0db0feb0d71d06ba.tar.xz kernel-qcow2-util-linux-9146a00823925f318fb7b71f0db0feb0d71d06ba.zip | |
ibfdisk: (gpt) allow to maximize partition
enlarge second partition:
# echo ',+' | ./sfdisk -N2 /dev/sdb
...
Disk /dev/sdb: 100 MiB, 104857600 bytes, 204800 sectors
Old situation:
Device Start End Sectors Size Type
/dev/sdb1 2048 22527 20480 10M Linux filesystem
/dev/sdb2 22528 43007 20480 10M Linux filesystem
New situation:
Device Start End Sectors Size Type
/dev/sdb1 2048 22527 20480 10M Linux filesystem
/dev/sdb2 22528 204766 182239 89M Linux filesystem
Signed-off-by: Karel Zak <kzak@redhat.com>
| -rw-r--r-- | libfdisk/src/gpt.c | 22 |
1 files changed, 20 insertions, 2 deletions
diff --git a/libfdisk/src/gpt.c b/libfdisk/src/gpt.c index ecf62d2d4..d3bc4ae00 100644 --- a/libfdisk/src/gpt.c +++ b/libfdisk/src/gpt.c @@ -1499,6 +1499,7 @@ static int gpt_set_partition(struct fdisk_context *cxt, size_t n, struct fdisk_gpt_label *gpt; struct gpt_entry *e; int rc = 0; + uint64_t start, end; assert(cxt); assert(cxt->label); @@ -1509,6 +1510,9 @@ static int gpt_set_partition(struct fdisk_context *cxt, size_t n, if ((uint32_t) n >= le32_to_cpu(gpt->pheader->npartition_entries)) return -EINVAL; + FDISK_INIT_UNDEF(start); + FDISK_INIT_UNDEF(end); + gpt = self_label(cxt); e = &gpt->ents[n]; @@ -1550,9 +1554,23 @@ static int gpt_set_partition(struct fdisk_context *cxt, size_t n, } if (fdisk_partition_has_start(pa)) - e->lba_start = cpu_to_le64(pa->start); + start = pa->start; if (fdisk_partition_has_size(pa)) - e->lba_end = cpu_to_le64(gpt_partition_start(e) + pa->size - 1ULL); + end = gpt_partition_start(e) + pa->size - 1ULL; + + if (pa->end_follow_default) { + /* enlarge */ + if (!FDISK_IS_UNDEF(start)) + start = gpt_partition_start(e); + end = find_last_free(gpt->bheader, gpt->ents, start); + if (!end) + FDISK_INIT_UNDEF(end); + } + + if (!FDISK_IS_UNDEF(start)) + e->lba_start = cpu_to_le64(start); + if (!FDISK_IS_UNDEF(end)) + e->lba_end = cpu_to_le64(end); gpt_recompute_crc(gpt->pheader, gpt->ents); gpt_recompute_crc(gpt->bheader, gpt->ents); |