Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 82ead7fe authored by J. Bruce Fields's avatar J. Bruce Fields
Browse files

nfsd: filter lookup results in V4ROOT case



We treat every object as a mountpoint and pretend it doesn't exist if
it isn't exported.

Signed-off-by: default avatarJ. Bruce Fields <bfields@citi.umich.edu>
parent 3b6cee7b
Loading
Loading
Loading
Loading
+14 −1
Original line number Diff line number Diff line
@@ -166,6 +166,19 @@ static int nfsd_lookup_parent(struct svc_rqst *rqstp, struct dentry *dparent, st
	return 0;
}

/*
 * For nfsd purposes, we treat V4ROOT exports as though there was an
 * export at *every* directory.
 */
static int nfsd_mountpoint(struct dentry *dentry, struct svc_export *exp)
{
	if (d_mountpoint(dentry))
		return 1;
	if (!(exp->ex_flags & NFSEXP_V4ROOT))
		return 0;
	return dentry->d_inode != NULL;
}

__be32
nfsd_lookup_dentry(struct svc_rqst *rqstp, struct svc_fh *fhp,
		   const char *name, unsigned int len,
@@ -211,7 +224,7 @@ nfsd_lookup_dentry(struct svc_rqst *rqstp, struct svc_fh *fhp,
		/*
		 * check if we have crossed a mount point ...
		 */
		if (d_mountpoint(dentry)) {
		if (nfsd_mountpoint(dentry, exp)) {
			if ((host_err = nfsd_cross_mnt(rqstp, &dentry, &exp))) {
				dput(dentry);
				goto out_nfserr;