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| author | Brooks Davis <brooks@FreeBSD.org> | 2006-08-09 01:56:17 +0000 |
|---|---|---|
| committer | Brooks Davis <brooks@FreeBSD.org> | 2006-08-09 01:56:17 +0000 |
| commit | a36aa44a85a4c52936c61ad1f2f48c0bec2d2703 (patch) | |
| tree | 64803d207eb90a11175a90d549f5ad720925546c /sys/nfsclient | |
| parent | 9500ad1d7de091ba6a05fb7da46914e12a8f5bf9 (diff) | |
| download | src-a36aa44a85a4c52936c61ad1f2f48c0bec2d2703.tar.gz src-a36aa44a85a4c52936c61ad1f2f48c0bec2d2703.zip | |
Add a new kernel environment variable "boot.netif.mtu" which is used to
set the MTU prior to mounting root via NFS. This is required if the
server supports a higher than default MTU because the client will not
see the responses otherwise.
MFC after: 3 weeks
Notes
Notes:
svn path=/head/; revision=161109
Diffstat (limited to 'sys/nfsclient')
| -rw-r--r-- | sys/nfsclient/nfs_vfsops.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/sys/nfsclient/nfs_vfsops.c b/sys/nfsclient/nfs_vfsops.c index bd9adc2154ff..6a29da811f1c 100644 --- a/sys/nfsclient/nfs_vfsops.c +++ b/sys/nfsclient/nfs_vfsops.c @@ -397,9 +397,11 @@ nfs_mountroot(struct mount *mp, struct thread *td) struct nfsv3_diskless *nd = &nfsv3_diskless; struct socket *so; struct vnode *vp; + struct ifreq ir; int error, i; u_long l; char buf[128]; + char *cp; NET_ASSERT_GIANT(); @@ -448,6 +450,14 @@ nfs_mountroot(struct mount *mp, struct thread *td) error = ifioctl(so, SIOCAIFADDR, (caddr_t)&nd->myif, td); if (error) panic("nfs_mountroot: SIOCAIFADDR: %d", error); + if ((cp = getenv("boot.netif.mtu")) != NULL) { + ir.ifr_mtu = strtol(cp, NULL, 10); + bcopy(nd->myif.ifra_name, ir.ifr_name, IFNAMSIZ); + freeenv(cp); + error = ifioctl(so, SIOCSIFMTU, (caddr_t)&ir, td); + if (error) + printf("nfs_mountroot: SIOCSIFMTU: %d", error); + } soclose(so); /* |