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Provide a sysctl to allow defaulting of the connectionless (-c) feature

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to mount_nfs.  The sysctl defaults to 1 (paranoid mode).  Setting it to 0
will allow an NFS client to receive replies on a different IP then they
were sent to by default.

Submitted by:	Sean Eric Fagan <sef@kithrup.com>
This commit is contained in:
Matthew Dillon 2003-01-22 19:57:31 +00:00
parent 7dcb0a0e83
commit 146cc84e0d
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=109704
1 changed files with 15 additions and 0 deletions
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15
sys/nfsclient/nfs_vfsops.c
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@ -85,6 +85,9 @@ struct nfsstats nfsstats;
SYSCTL_NODE(_vfs, OID_AUTO, nfs, CTLFLAG_RW, 0, "NFS filesystem");
SYSCTL_STRUCT(_vfs_nfs, NFS_NFSSTATS, nfsstats, CTLFLAG_RD,
&nfsstats, nfsstats, "S,nfsstats");
static int nfs_ip_paranoia = 1;
SYSCTL_INT(_vfs_nfs, OID_AUTO, nfs_ip_paranoia, CTLFLAG_RW,
&nfs_ip_paranoia, 0, "");
#ifdef NFS_DEBUG
int nfs_debug;
SYSCTL_INT(_vfs_nfs, OID_AUTO, debug, CTLFLAG_RW, &nfs_debug, 0, "");
@ -772,6 +775,18 @@ nfs_mount(struct mount *mp, char *path, caddr_t data, struct nameidata *ndp,
nfs_decode_args(nmp, &args);
return (0);
}
/*
* Make the nfs_ip_paranoia sysctl serve as the default connection
* or no-connection mode for those protocols that support
* no-connection mode (the flag will be cleared later for protocols
* that do not support no-connection mode). This will allow a client
* to receive replies from a different IP then the request was
* sent to. Note: default value for nfs_ip_paranoia is 1 (paranoid),
* not 0.
*/
if (nfs_ip_paranoia == 0)
args.flags |= NFSMNT_NOCONN;
if (args.fhsize < 0 || args.fhsize > NFSX_V3FHMAX)
return (EINVAL);
error = copyin((caddr_t)args.fh, (caddr_t)nfh, args.fhsize);