Commit 3ab4d8b1 authored by J. Bruce Fields's avatar J. Bruce Fields Committed by Linus Torvalds
Browse files

knfsd: nfsd: set rq_client to ip-address-determined-domain 



We want it to be possible for users to restrict exports both by IP address and
by pseudoflavor.  The pseudoflavor information has previously been passed
using special auth_domains stored in the rq_client field.  After the preceding
patch that stored the pseudoflavor in rq_pflavor, that's now superfluous; so
now we use rq_client for the ip information, as auth_null and auth_unix do.

However, we keep around the special auth_domain in the rq_gssclient field for
backwards compatibility purposes, so we can still do upcalls using the old
"gss/pseudoflavor" auth_domain if upcalls using the unix domain to give us an
appropriate export.  This allows us to continue supporting old mountd.

In fact, for this first patch, we always use the "gss/pseudoflavor"
auth_domain (and only it) if it is available; thus rq_client is ignored in the
auth_gss case, and this patch on its own makes no change in behavior; that
will be left to later patches.

Note on idmap: I'm almost tempted to just replace the auth_domain in the idmap
upcall by a dummy value--no version of idmapd has ever used it, and it's
unlikely anyone really wants to perform idmapping differently depending on the
where the client is (they may want to perform *credential* mapping
differently, but that's a different matter--the idmapper just handles id's
used in getattr and setattr).  But I'm updating the idmapd code anyway, just
out of general backwards-compatibility paranoia.

Signed-off-by: default avatar"J. Bruce Fields" <bfields@citi.umich.edu>
Signed-off-by: default avatarNeil Brown <neilb@suse.de>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 0989a788

fs/nfsd/export.c

+11 −4
Original line number Diff line number Diff line
@@ -1237,21 +1237,28 @@ struct svc_export * 
rqst_exp_get_by_name(struct svc_rqst *rqstp, struct vfsmount *mnt,

		struct dentry *dentry)

{

	return exp_get_by_name(rqstp->rq_client, mnt, dentry,

						&rqstp->rq_chandle);

	struct auth_domain *clp;



	clp = rqstp->rq_gssclient ? rqstp->rq_gssclient : rqstp->rq_client;

	return exp_get_by_name(clp, mnt, dentry, &rqstp->rq_chandle);

}



struct svc_export *

rqst_exp_find(struct svc_rqst *rqstp, int fsid_type, u32 *fsidv)

{

	return exp_find(rqstp->rq_client, fsid_type, fsidv,

						&rqstp->rq_chandle);

	struct auth_domain *clp;



	clp = rqstp->rq_gssclient ? rqstp->rq_gssclient : rqstp->rq_client;

	return exp_find(clp, fsid_type, fsidv, &rqstp->rq_chandle);

}



struct svc_export *

rqst_exp_parent(struct svc_rqst *rqstp, struct vfsmount *mnt,

		struct dentry *dentry)

{

	struct auth_domain *clp;



	clp = rqstp->rq_gssclient ? rqstp->rq_gssclient : rqstp->rq_client;

	return exp_parent(rqstp->rq_client, mnt, dentry, &rqstp->rq_chandle);

}

fs/nfsd/nfs4idmap.c

+11 −2
Original line number Diff line number Diff line
@@ -587,6 +587,15 @@ idmap_lookup(struct svc_rqst *rqstp, 
	return ret;

}



static char *

rqst_authname(struct svc_rqst *rqstp)

{

	struct auth_domain *clp;



	clp = rqstp->rq_gssclient ? rqstp->rq_gssclient : rqstp->rq_client;

	return clp->name;

}



static int

idmap_name_to_id(struct svc_rqst *rqstp, int type, const char *name, u32 namelen,

		uid_t *id)
@@ -600,7 +609,7 @@ idmap_name_to_id(struct svc_rqst *rqstp, int type, const char *name, u32 namelen 
		return -EINVAL;

	memcpy(key.name, name, namelen);

	key.name[namelen] = '\0';

	strlcpy(key.authname, rqstp->rq_client->name, sizeof(key.authname));

	strlcpy(key.authname, rqst_authname(rqstp), sizeof(key.authname));

	ret = idmap_lookup(rqstp, nametoid_lookup, &key, &nametoid_cache, &item);

	if (ret == -ENOENT)

		ret = -ESRCH; /* nfserr_badname */
@@ -620,7 +629,7 @@ idmap_id_to_name(struct svc_rqst *rqstp, int type, uid_t id, char *name) 
	};

	int ret;



	strlcpy(key.authname, rqstp->rq_client->name, sizeof(key.authname));

	strlcpy(key.authname, rqst_authname(rqstp), sizeof(key.authname));

	ret = idmap_lookup(rqstp, idtoname_lookup, &key, &idtoname_cache, &item);

	if (ret == -ENOENT)

		return sprintf(name, "%u", id);

fs/nfsd/nfsfh.c

+0 −2
Original line number Diff line number Diff line
@@ -120,8 +120,6 @@ fh_verify(struct svc_rqst *rqstp, struct svc_fh *fhp, int type, int access) 
		int data_left = fh->fh_size/4;



		error = nfserr_stale;

		if (rqstp->rq_client == NULL)

			goto out;

		if (rqstp->rq_vers > 2)

			error = nfserr_badhandle;

		if (rqstp->rq_vers == 4 && fh->fh_size == 0)

include/linux/sunrpc/svc.h

+1 −0
Original line number Diff line number Diff line
@@ -249,6 +249,7 @@ struct svc_rqst { 
						 */

	/* Catering to nfsd */

	struct auth_domain *	rq_client;	/* RPC peer info */

	struct auth_domain *	rq_gssclient;	/* "gss/"-style peer info */

	struct svc_cacherep *	rq_cacherep;	/* cache info */

	struct knfsd_fh *	rq_reffh;	/* Referrence filehandle, used to

						 * determine what device number

include/linux/sunrpc/svcauth.h

+1 −0
Original line number Diff line number Diff line
@@ -127,6 +127,7 @@ extern struct auth_domain *auth_unix_lookup(struct in_addr addr); 
extern int auth_unix_forget_old(struct auth_domain *dom);

extern void svcauth_unix_purge(void);

extern void svcauth_unix_info_release(void *);

extern int svcauth_unix_set_client(struct svc_rqst *rqstp);



static inline unsigned long hash_str(char *name, int bits)

{

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