Martchus
/
mdadm
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

imsm: write anchor last 

Ensure that newly written anchors reflect a consistent metadata block.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Dan Williams 2008-06-16 15:36:41 -07:00
parent 551c80c1c1
commit 272f648fb0
1 changed files with 12 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

25
super-intel.c
View File

@ -1795,6 +1795,18 @@ static int store_imsm_mpb(int fd, struct intel_super *super)
get_dev_size(fd, NULL, &dsize);
if (mpb_size > 512) {
/* -1 to account for anchor */
sectors = mpb_sectors(mpb) - 1;
/* write the extended mpb to the sectors preceeding the anchor */
if (lseek64(fd, dsize - (512 * (2 + sectors)), SEEK_SET) < 0)
return 1;
if (write(fd, super->buf + 512, mpb_size - 512) != mpb_size - 512)
return 1;
}
/* first block is stored on second to last sector of the disk */
if (lseek64(fd, dsize - (512 * 2), SEEK_SET) < 0)
return 1;
@ -1802,19 +1814,6 @@ static int store_imsm_mpb(int fd, struct intel_super *super)
if (write(fd, super->buf, 512) != 512)
return 1;
if (mpb_size <= 512)
return 0;
/* -1 because we already wrote a sector */
sectors = mpb_sectors(mpb) - 1;
/* write the extended mpb to the sectors preceeding the anchor */
if (lseek64(fd, dsize - (512 * (2 + sectors)), SEEK_SET) < 0)
return 1;
if (write(fd, super->buf + 512, mpb_size - 512) != mpb_size - 512)
return 1;
fsync(fd);
return 0;