Date: Sun, 25 Aug 2019 05:11:44 +0000 (UTC) From: Mateusz Guzik <mjg@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r351471 - in head/sys: kern sys Message-ID: <201908250511.x7P5BiPl016074@repo.freebsd.org>
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Author: mjg Date: Sun Aug 25 05:11:43 2019 New Revision: 351471 URL: https://svnweb.freebsd.org/changeset/base/351471 Log: vfs: add vholdnz (for already held vnodes) Reviewed by: kib (previous version) Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D21358 Modified: head/sys/kern/vfs_subr.c head/sys/sys/vnode.h Modified: head/sys/kern/vfs_subr.c ============================================================================== --- head/sys/kern/vfs_subr.c Sun Aug 25 04:56:33 2019 (r351470) +++ head/sys/kern/vfs_subr.c Sun Aug 25 05:11:43 2019 (r351471) @@ -3018,6 +3018,19 @@ _vhold(struct vnode *vp, bool locked) VI_UNLOCK(vp); } +void +vholdnz(struct vnode *vp) +{ + + CTR2(KTR_VFS, "%s: vp %p", __func__, vp); +#ifdef INVARIANTS + int old = atomic_fetchadd_int(&vp->v_holdcnt, 1); + VNASSERT(old > 0, vp, ("%s: wrong hold count", __func__)); +#else + atomic_add_int(&vp->v_holdcnt, 1); +#endif +} + /* * Drop the hold count of the vnode. If this is the last reference to * the vnode we place it on the free list unless it has been vgone'd Modified: head/sys/sys/vnode.h ============================================================================== --- head/sys/sys/vnode.h Sun Aug 25 04:56:33 2019 (r351470) +++ head/sys/sys/vnode.h Sun Aug 25 05:11:43 2019 (r351471) @@ -657,6 +657,7 @@ void vgone(struct vnode *vp); #define vhold(vp) _vhold((vp), 0) #define vholdl(vp) _vhold((vp), 1) void _vhold(struct vnode *, bool); +void vholdnz(struct vnode *); void vinactive(struct vnode *, struct thread *); int vinvalbuf(struct vnode *vp, int save, int slpflag, int slptimeo); int vtruncbuf(struct vnode *vp, off_t length, int blksize);
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