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Fix reporting of NOTE_LINK when directory link count changes due to

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rename removing or adding subdirectory entry.

Discussed with and tested by:	Vladimir Kondratyev <wulf@cicgroup.ru>
NetBSD PR:	48958 (http://gnats.netbsd.org/48958)
MFC after:	2 weeks
Sponsored by:	The FreeBSD Foundation
This commit is contained in:
Konstantin Belousov 2016-05-02 13:13:32 +00:00
parent b35978d0da
commit bd2ead6b2e
1 changed files with 18 additions and 2 deletions
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20
sys/kern/vfs_subr.c
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@ -4650,10 +4650,26 @@ void
vop_rename_post(void *ap, int rc)
{
struct vop_rename_args *a = ap;
long hint;
if (!rc) {
VFS_KNOTE_UNLOCKED(a->a_fdvp, NOTE_WRITE);
VFS_KNOTE_UNLOCKED(a->a_tdvp, NOTE_WRITE);
hint = NOTE_WRITE;
if (a->a_fdvp == a->a_tdvp) {
if (a->a_tvp != NULL && a->a_tvp->v_type == VDIR)
hint |= NOTE_LINK;
VFS_KNOTE_UNLOCKED(a->a_fdvp, hint);
VFS_KNOTE_UNLOCKED(a->a_tdvp, hint);
} else {
if (a->a_fvp->v_type == VDIR)
hint |= NOTE_LINK;
VFS_KNOTE_UNLOCKED(a->a_fdvp, hint);
if (a->a_fvp->v_type == VDIR && a->a_tvp != NULL &&
a->a_tvp->v_type == VDIR)
hint &= ~NOTE_LINK;
VFS_KNOTE_UNLOCKED(a->a_tdvp, hint);
}
VFS_KNOTE_UNLOCKED(a->a_fvp, NOTE_RENAME);
if (a->a_tvp)
VFS_KNOTE_UNLOCKED(a->a_tvp, NOTE_DELETE);