Author: pfg
Date: Mon Jul 1 21:43:40 2013
New Revision: 252484
URL: http://svnweb.freebsd.org/changeset/base/252484
Log:
Change i_gen in UFS to an unsigned type.
Revert the simplification of the i_gen calculation.
It is still a good idea to avoid zero values and for the case
of old filesystems there is probably no advantage in using
the complete 32 bits anyways.
Discussed with: bde
MFC after: 4 weeks
Modified:
head/sys/ufs/ffs/ffs_vfsops.c
Modified: head/sys/ufs/ffs/ffs_vfsops.c
==============================================================================
--- head/sys/ufs/ffs/ffs_vfsops.c Mon Jul 1 21:41:12 2013
(r252483)
+++ head/sys/ufs/ffs/ffs_vfsops.c Mon Jul 1 21:43:40 2013
(r252484)
@@ -1791,7 +1791,7 @@ ffs_vgetf(mp, ino, flags, vpp, ffs_flags
* already have one. This should only happen on old filesystems.
*/
if (ip->i_gen == 0) {
- ip->i_gen = arc4random();
+ ip->i_gen = arc4random()/2 + 1;
if ((vp->v_mount->mnt_flag & MNT_RDONLY) == 0) {
ip->i_flag |= IN_MODIFIED;
DIP_SET(ip, i_gen, ip->i_gen);
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