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Commit 3227fa41 authored by J. Bruce Fields's avatar J. Bruce Fields
Browse files

nfsd: filter readdir results in V4ROOT case 



As with lookup, we treat every boject as a mountpoint and pretend it
doesn't exist if it isn't exported.

The preexisting code here is confusing, but I haven't yet figured out
how to make it clearer.

Signed-off-by: default avatarJ. Bruce Fields <bfields@citi.umich.edu>
parent 82ead7fe

fs/nfsd/nfs4xdr.c

+7 −3
Original line number Diff line number Diff line
@@ -2196,11 +2196,14 @@ nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd, 
	 * we will not follow the cross mount and will fill the attribtutes

	 * directly from the mountpoint dentry.

	 */

	if (d_mountpoint(dentry) && !attributes_need_mount(cd->rd_bmval))

		ignore_crossmnt = 1;

	else if (d_mountpoint(dentry)) {

	if (nfsd_mountpoint(dentry, exp)) {

		int err;



		if (!(exp->ex_flags & NFSEXP_V4ROOT)

				&& !attributes_need_mount(cd->rd_bmval)) {

			ignore_crossmnt = 1;

			goto out_encode;

		}

		/*

		 * Why the heck aren't we just using nfsd_lookup??

		 * Different "."/".." handling?  Something else?
@@ -2216,6 +2219,7 @@ nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd, 
			goto out_put;



	}

out_encode:

	nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval,

					cd->rd_rqstp, ignore_crossmnt);

out_put:

fs/nfsd/vfs.c

+1 −1
Original line number Diff line number Diff line
@@ -170,7 +170,7 @@ static int nfsd_lookup_parent(struct svc_rqst *rqstp, struct dentry *dparent, st 
 * 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)

int nfsd_mountpoint(struct dentry *dentry, struct svc_export *exp)

{

	if (d_mountpoint(dentry))

		return 1;

fs/nfsd/vfs.h

+1 −0
Original line number Diff line number Diff line
@@ -40,6 +40,7 @@ __be32 nfsd_lookup_dentry(struct svc_rqst *, struct svc_fh *, 
				struct svc_export **, struct dentry **);

__be32		nfsd_setattr(struct svc_rqst *, struct svc_fh *,

				struct iattr *, int, time_t);

int nfsd_mountpoint(struct dentry *, struct svc_export *);

#ifdef CONFIG_NFSD_V4

__be32          nfsd4_set_nfs4_acl(struct svc_rqst *, struct svc_fh *,

                    struct nfs4_acl *);