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| author |   kettenis <kettenis@openbsd.org> | 2013-08-06 08:22:37 +0000 |
|---|---|---|
| committer | kettenis <kettenis@openbsd.org> | 2013-08-06 08:22:37 +0000 |
| commit | 8ee7e372d768100fd5261a28f21d57ad9fa08738 (patch) | |
| tree | 2c180963e051d8b73c5977a6d103e71c5553d2b9 /sys/kern/spec_vnops.c | |
| parent | The atomic_setbits_int() and atomic_clearbits_int() functions touch the (diff) | |
| download | wireguard-openbsd-8ee7e372d768100fd5261a28f21d57ad9fa08738.tar.xz wireguard-openbsd-8ee7e372d768100fd5261a28f21d57ad9fa08738.zip | |
Make it possible to have multiple clonable devices per major.
Diffstat (limited to 'sys/kern/spec_vnops.c')
| -rw-r--r-- | sys/kern/spec_vnops.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/sys/kern/spec_vnops.c b/sys/kern/spec_vnops.c index 49d301de241..20ce5f2da03 100644 --- a/sys/kern/spec_vnops.c +++ b/sys/kern/spec_vnops.c @@ -1,4 +1,4 @@ -/* $OpenBSD: spec_vnops.c,v 1.75 2013/07/29 18:51:42 kettenis Exp $ */ +/* $OpenBSD: spec_vnops.c,v 1.76 2013/08/06 08:22:37 kettenis Exp $ */ /* $NetBSD: spec_vnops.c,v 1.29 1996/04/22 01:42:38 christos Exp $ */ /* @@ -691,6 +691,9 @@ spec_open_clone(struct vop_open_args *ap) DNPRINTF("cloning vnode\n"); + if (minor(vp->v_rdev) >= (1 << CLONE_SHIFT)) + return (ENXIO); + for (i = 1; i < sizeof(vp->v_specbitmap) * NBBY; i++) if (isclr(vp->v_specbitmap, i)) { setbit(vp->v_specbitmap, i); @@ -700,7 +703,8 @@ spec_open_clone(struct vop_open_args *ap) if (i == sizeof(vp->v_specbitmap) * NBBY) return (EBUSY); /* too many open instances */ - error = cdevvp(makedev(major(vp->v_rdev), i), &cvp); + error = cdevvp(makedev(major(vp->v_rdev), + (i << CLONE_SHIFT) | minor(vp->v_rdev)), &cvp); if (error) { clrbit(vp->v_specbitmap, i); return (error); /* out of vnodes */ @@ -746,7 +750,7 @@ spec_close_clone(struct vop_close_args *ap) return (error); /* device close failed */ pvp = vp->v_specparent; /* get parent device */ - clrbit(pvp->v_specbitmap, minor(vp->v_rdev)); + clrbit(pvp->v_specbitmap, minor(vp->v_rdev) >> CLONE_SHIFT); vrele(pvp); return (0); /* clone closed */ |