Date: Mon, 01 Dec 2025 16:38:11 +0000 From: Mark Johnston <markj@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org Cc: Quent=?utf-8?Q?in Th=C3=A9?=bault <quentin.thebault@defenso.fr> Subject: git: 626cf6c8fcff - stable/15 - bhyve: add support for ng_device network backend Message-ID: <692dc473.8103.7e43c99a@gitrepo.freebsd.org>
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The branch stable/15 has been updated by markj: URL: https://cgit.FreeBSD.org/src/commit/?id=626cf6c8fcff7acf10da4894d6f876026cb173db commit 626cf6c8fcff7acf10da4894d6f876026cb173db Author: Quentin Thébault <quentin.thebault@defenso.fr> AuthorDate: 2025-09-12 08:39:55 +0000 Commit: Mark Johnston <markj@FreeBSD.org> CommitDate: 2025-12-01 16:37:57 +0000 bhyve: add support for ng_device network backend Signed-off-by: Quentin Thébault <quentin.thebault@defenso.fr> Reviewed by: markj MFC after: 1 month Sponsored by: Defenso Differential Revision: https://reviews.freebsd.org/D52542 Pull Request: https://github.com/freebsd/freebsd-src/pull/1880 (cherry picked from commit 1aad95345237424918e5f6b18464df4dbc2aa1d8) --- usr.sbin/bhyve/bhyve.8 | 19 ++++++++++++++++++- usr.sbin/bhyve/net_backends.c | 19 ++++++++++++++++++- 2 files changed, 36 insertions(+), 2 deletions(-) diff --git a/usr.sbin/bhyve/bhyve.8 b/usr.sbin/bhyve/bhyve.8 index 13f0d239ef40..27e067f50394 100644 --- a/usr.sbin/bhyve/bhyve.8 +++ b/usr.sbin/bhyve/bhyve.8 @@ -521,6 +521,8 @@ considered unconnected. .Op Cm \&,mtu= Ar N .Xc .It +.Cm ngd Ar N +.It .Xo .Cm netgraph,path= Ar ADDRESS Cm \&,peerhook= Ar HOOK .Op Cm \&,socket= Ar NAME @@ -545,6 +547,19 @@ The MAC address is an ASCII string in .Xr ethers 5 format. .Pp +A +.Cm ngd +device can be used to connect a guest to a +.Xr netgraph 4 +through a +.Xr ng_device 4 +node. +This can be used to run bhyve in a +.Xr VNET 9 +jail, and give it access to the host's netgraph, that cannot be reached +directly, by exposing the ng_device through +.Xr devfs 8 . +.Pp With .Cm virtio-net devices, the @@ -575,7 +590,9 @@ must comply with .Xr netgraph 4 addressing rules. .Pp -The slirp backend can be used to provide a NATed network to the guest. +The +.Cm slirp +backend can be used to provide a NATed network to the guest. This backend has poor performance but does not require any network configuration on the host system. It depends on the diff --git a/usr.sbin/bhyve/net_backends.c b/usr.sbin/bhyve/net_backends.c index 2d11c45f217a..95909d1f8ea2 100644 --- a/usr.sbin/bhyve/net_backends.c +++ b/usr.sbin/bhyve/net_backends.c @@ -119,7 +119,8 @@ tap_init(struct net_backend *be, const char *devname, goto error; } - if (ioctl(be->fd, VMIO_SIOCSIFFLAGS, up)) { + if (strncmp("ngd", be->prefix, 3) && + ioctl(be->fd, VMIO_SIOCSIFFLAGS, up)) { EPRINTLN("tap device link up failed"); goto error; } @@ -273,8 +274,24 @@ static struct net_backend vmnet_backend = { .set_cap = tap_set_cap, }; +/* A clone of the tap backend, with a different prefix. */ +static struct net_backend ngd_backend = { + .prefix = "ngd", + .priv_size = sizeof(struct tap_priv), + .init = tap_init, + .cleanup = tap_cleanup, + .send = tap_send, + .peek_recvlen = tap_peek_recvlen, + .recv = tap_recv, + .recv_enable = tap_recv_enable, + .recv_disable = tap_recv_disable, + .get_cap = tap_get_cap, + .set_cap = tap_set_cap, +}; + DATA_SET(net_backend_set, tap_backend); DATA_SET(net_backend_set, vmnet_backend); +DATA_SET(net_backend_set, ngd_backend); int netbe_legacy_config(nvlist_t *nvl, const char *opts)help
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