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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

fs/nfsd/vfs.c

+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;