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Add a few more V_hacks to nfsclient to allow machines with a VIMAGE

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kernel to boot from NFS. [1]

Note: this is not a full virtualization of nfsclient. It is only does
what advertised above and nothing more.

Requested by:	public demand [1]
Tested by:	kris, ..
MFC after:	5 days
This commit is contained in:
Bjoern A. Zeeb 2009-12-13 11:06:39 +00:00
parent d993d09a6c
commit e65a4ba18b
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=200471
4 changed files with 29 additions and 4 deletions
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7
sys/nfsclient/bootp_subr.c
View File

@ -584,6 +584,8 @@ bootpc_call(struct bootpc_globalcontext *gctx, struct thread *td)
int retry;
const char *s;
CURVNET_SET(TD_TO_VNET(td));
/*
* Create socket and set its recieve timeout.
*/
@ -960,6 +962,7 @@ bootpc_call(struct bootpc_globalcontext *gctx, struct thread *td)
out:
soclose(so);
out0:
CURVNET_RESTORE();
return error;
}
@ -974,6 +977,8 @@ bootpc_fakeup_interface(struct bootpc_ifcontext *ifctx,
struct ifaddr *ifa;
struct sockaddr_dl *sdl;
CURVNET_SET(TD_TO_VNET(td));
error = socreate(AF_INET, &ifctx->so, SOCK_DGRAM, 0, td->td_ucred, td);
if (error != 0)
panic("nfs_boot: socreate, error=%d", error);
@ -1048,6 +1053,8 @@ bootpc_fakeup_interface(struct bootpc_ifcontext *ifctx,
ifctx->ireq.ifr_name);
ifctx->sdl = sdl;
CURVNET_RESTORE();
return error;
}

5
sys/nfsclient/krpc_subr.c
View File

@ -55,6 +55,8 @@ __FBSDID("$FreeBSD$");
#include <sys/uio.h>
#include <net/if.h>
#include <net/vnet.h>
#include <netinet/in.h>
#include <rpc/types.h>
@ -213,6 +215,8 @@ krpc_call(struct sockaddr_in *sa, u_int prog, u_int vers, u_int func,
nam = mhead = NULL;
from = NULL;
CURVNET_SET(TD_TO_VNET(td));
/*
* Create socket and set its recieve timeout.
*/
@ -425,6 +429,7 @@ krpc_call(struct sockaddr_in *sa, u_int prog, u_int vers, u_int func,
if (mhead) m_freem(mhead);
if (from) free(from, M_SONAME);
soclose(so);
CURVNET_RESTORE();
return error;
}

5
sys/nfsclient/nfs_vfsops.c
View File

@ -64,6 +64,8 @@ __FBSDID("$FreeBSD$");
#include <net/if.h>
#include <net/route.h>
#include <net/vnet.h>
#include <netinet/in.h>
#include <rpc/rpc.h>
@ -825,6 +827,8 @@ nfs_mount(struct mount *mp)
has_fh_opt = 0;
has_hostname_opt = 0;
CURVNET_SET(CRED_TO_VNET(curthread->td_ucred));
if (vfs_filteropt(mp->mnt_optnew, nfs_opts)) {
error = EINVAL;
goto out;
@ -1124,6 +1128,7 @@ nfs_mount(struct mount *mp)
mp->mnt_kern_flag |= (MNTK_MPSAFE|MNTK_LOOKUP_SHARED);
MNT_IUNLOCK(mp);
}
CURVNET_RESTORE();
return (error);
}

16
sys/nfsclient/nfs_vnops.c
View File

@ -1555,14 +1555,21 @@ nfs_create(struct vop_create_args *ap)
struct vattr vattr;
int v3 = NFS_ISV3(dvp);
CURVNET_SET(CRED_TO_VNET(curthread->td_ucred));
/*
* Oops, not for me..
*/
if (vap->va_type == VSOCK)
return (nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap));
if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred)) != 0)
if (vap->va_type == VSOCK) {
error = nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap);
CURVNET_RESTORE();
return (error);
}
if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred)) != 0) {
CURVNET_RESTORE();
return (error);
}
if (vap->va_vaflags & VA_EXCLUSIVE)
fmode |= O_EXCL;
again:
@ -1658,6 +1665,7 @@ nfs_create(struct vop_create_args *ap)
KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(dvp);
}
mtx_unlock(&(VTONFS(dvp))->n_mtx);
CURVNET_RESTORE();
return (error);
}