diff options
Diffstat (limited to 'sys/kern/vfs_subr.c')
| -rw-r--r-- | sys/kern/vfs_subr.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/sys/kern/vfs_subr.c b/sys/kern/vfs_subr.c index cf701c6..d9813e3 100644 --- a/sys/kern/vfs_subr.c +++ b/sys/kern/vfs_subr.c @@ -2571,11 +2571,34 @@ void vrefl(struct vnode *vp) { + ASSERT_VI_LOCKED(vp, __func__); CTR2(KTR_VFS, "%s: vp %p", __func__, vp); _vhold(vp, true); v_incr_usecount_locked(vp); } +void +vrefact(struct vnode *vp) +{ + + CTR2(KTR_VFS, "%s: vp %p", __func__, vp); + if (__predict_false(vp->v_type == VCHR)) { + VNASSERT(vp->v_holdcnt > 0 && vp->v_usecount > 0, vp, + ("%s: wrong ref counts", __func__)); + vref(vp); + return; + } +#ifdef INVARIANTS + int old = atomic_fetchadd_int(&vp->v_holdcnt, 1); + VNASSERT(old > 0, vp, ("%s: wrong hold count", __func__)); + old = atomic_fetchadd_int(&vp->v_usecount, 1); + VNASSERT(old > 0, vp, ("%s: wrong use count", __func__)); +#else + refcount_acquire(&vp->v_holdcnt); + refcount_acquire(&vp->v_usecount); +#endif +} + /* * Return reference count of a vnode. * |
