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From: Jan Mikkelsen <janm@transactionware.com>
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Subject: Re: Panic in unionfs "it is not a unionfs-vnode"
Date: Wed, 15 Nov 2017 12:52:58 +1100
References: <06DF69C5-884F-4483-8AF7-2013F4E868D1@transactionware.com>
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Oops, wrong list. I just resent to freebsd-current.

> On 15 Nov 2017, at 12:48, Jan Mikkelsen <janm@transactionware.com> =
wrote:
>=20
> Hi,
>=20
> I got the panic below in unionfs. Head as at 325569, 2017-11-09 =
12:41:00 +1100 (Thu, 09 Nov 2017).
>=20
> This is a ufs filesystem union mounted on top of a read-only ufs /etc. =
I know unionfs has "architecture issues=E2=80=9D. Is this resolvable?=20
>=20
> panic: unionfs: it is not unionfs-vnode
> cpuid =3D 5
> time =3D 1510678800
> KDB: stack backtrace:
> db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame =
0xfffffe02c418c280
> vpanic() at vpanic+0x19c/frame 0xfffffe02c418c300
> kassert_panic() at kassert_panic+0x126/frame 0xfffffe02c418c370
> unionfs_lock() at unionfs_lock+0x635/frame 0xfffffe02c418c400
> VOP_LOCK1_APV() at VOP_LOCK1_APV+0xd9/frame 0xfffffe02c418c430
> _vn_lock() at _vn_lock+0x66/frame 0xfffffe02c418c4a0
> vget() at vget+0x82/frame 0xfffffe02c418c4e0
> cache_lookup() at cache_lookup+0x787/frame 0xfffffe02c418c5c0
> vfs_cache_lookup() at vfs_cache_lookup+0xac/frame 0xfffffe02c418c620
> VOP_LOOKUP_APV() at VOP_LOOKUP_APV+0xd3/frame 0xfffffe02c418c650
> lookup() at lookup+0x682/frame 0xfffffe02c418c6f0
> namei() at namei+0x51a/frame 0xfffffe02c418c7b0
> kern_statat() at kern_statat+0x98/frame 0xfffffe02c418c9c0
> sys_fstatat() at sys_fstatat+0x2f/frame 0xfffffe02c418cac0
> amd64_syscall() at amd64_syscall+0x79b/frame 0xfffffe02c418cbf0
> Xfast_syscall() at Xfast_syscall+0xfb/frame 0xfffffe02c418cbf0
> --- syscall (552, FreeBSD ELF64, sys_fstatat), rip =3D 0x800dd48da, =
rsp =3D 0x7fffffffddc8, rbp =3D 0x7fffffffde70 =E2=80=94
>=20
>=20
> Thanks,
>=20
> Jan Mikkelsen
>=20
>=20