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Re: [dm-devel] [PATCH] kpartx: fix extended partition size for >512b sectors



Applied, thanks

Christophe Varoqui
www.opensvc.com


On Mon, Jun 9, 2014 at 5:24 PM, Phillip Susi <psusi ubuntu com> wrote:
Extended partitions only get 2 sectors for 512 byte sector size,
to allow LILO the 1024 bytes of room it needs.  Larger sector size
disks already have room and so only use 1 sector.

Signed-off-by: Phillip Susi <psusi ubuntu com>
---
 kpartx/dos.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/kpartx/dos.c b/kpartx/dos.c
index 0e57f0e..90ad3bd 100644
--- a/kpartx/dos.c
+++ b/kpartx/dos.c
@@ -101,8 +101,12 @@ read_dos_pt(int fd, struct slice all, struct slice *sp, int ns) {
                        break;
                }
                if (is_extended(p.sys_type)) {
-                       sp[i].size = sector_size_mul * 2; /* extended partitions only get two
-                                          sectors mapped for LILO to install */
+                       /* extended partitions only get one or
+                          two sectors mapped for LILO to install,
+                          whichever is needed to have 1kb of space */
+                       if (sector_size_mul == 1)
+                               sp[i].size = 2;
+                       else sp[i].size = sector_size_mul;
                        n += read_extended_partition(fd, &p, i, sp+n, ns-n);
                }
        }
--
1.9.1

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