knfsd: nfsd4: return nfserr_wrongsec
Make the first actual use of the secinfo information by using it to return
nfserr_wrongsec when an export is found that doesn't allow the flavor used on
this request.
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Signed-off-by: Andy Adamson <andros@citi.umich.edu>
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/fs/nfsd/export.c b/fs/nfsd/export.c
index 4537a8f..323cbdc 100644
--- a/fs/nfsd/export.c
+++ b/fs/nfsd/export.c
@@ -1228,6 +1228,28 @@
return exp;
}
+__be32 check_nfsd_access(struct svc_export *exp, struct svc_rqst *rqstp)
+{
+ struct exp_flavor_info *f;
+ struct exp_flavor_info *end = exp->ex_flavors + exp->ex_nflavors;
+
+ /* legacy gss-only clients are always OK: */
+ if (exp->ex_client == rqstp->rq_gssclient)
+ return 0;
+ /* ip-address based client; check sec= export option: */
+ for (f = exp->ex_flavors; f < end; f++) {
+ if (f->pseudoflavor == rqstp->rq_flavor)
+ return 0;
+ }
+ /* defaults in absence of sec= options: */
+ if (exp->ex_nflavors == 0) {
+ if (rqstp->rq_flavor == RPC_AUTH_NULL ||
+ rqstp->rq_flavor == RPC_AUTH_UNIX)
+ return 0;
+ }
+ return nfserr_wrongsec;
+}
+
/*
* Uses rq_client and rq_gssclient to find an export; uses rq_client (an
* auth_unix client) if it's available and has secinfo information;
@@ -1340,6 +1362,10 @@
if (IS_ERR(exp))
return nfserrno(PTR_ERR(exp));
rv = fh_compose(fhp, exp, exp->ex_dentry, NULL);
+ if (rv)
+ goto out;
+ rv = check_nfsd_access(exp, rqstp);
+out:
exp_put(exp);
return rv;
}
diff --git a/fs/nfsd/nfsfh.c b/fs/nfsd/nfsfh.c
index 22cb5be..d5fe392 100644
--- a/fs/nfsd/nfsfh.c
+++ b/fs/nfsd/nfsfh.c
@@ -20,6 +20,7 @@
#include <linux/sunrpc/clnt.h>
#include <linux/sunrpc/svc.h>
+#include <linux/sunrpc/svcauth_gss.h>
#include <linux/nfsd/nfsd.h>
#define NFSDDBG_FACILITY NFSDDBG_FH
@@ -248,6 +249,11 @@
if (error)
goto out;
+ /* Check security flavor */
+ error = check_nfsd_access(exp, rqstp);
+ if (error)
+ goto out;
+
/* Finally, check access permissions. */
error = nfsd_permission(exp, dentry, access);
diff --git a/fs/nfsd/nfssvc.c b/fs/nfsd/nfssvc.c
index 5c8192b..a8c89ae 100644
--- a/fs/nfsd/nfssvc.c
+++ b/fs/nfsd/nfssvc.c
@@ -494,6 +494,15 @@
module_put_and_exit(0);
}
+static __be32 map_new_errors(u32 vers, __be32 nfserr)
+{
+ if (nfserr == nfserr_jukebox && vers == 2)
+ return nfserr_dropit;
+ if (nfserr == nfserr_wrongsec && vers < 4)
+ return nfserr_acces;
+ return nfserr;
+}
+
int
nfsd_dispatch(struct svc_rqst *rqstp, __be32 *statp)
{
@@ -536,6 +545,7 @@
/* Now call the procedure handler, and encode NFS status. */
nfserr = proc->pc_func(rqstp, rqstp->rq_argp, rqstp->rq_resp);
+ nfserr = map_new_errors(rqstp->rq_vers, nfserr);
if (nfserr == nfserr_jukebox && rqstp->rq_vers == 2)
nfserr = nfserr_dropit;
if (nfserr == nfserr_dropit) {
diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c
index 627f460..8e109e5 100644
--- a/fs/nfsd/vfs.c
+++ b/fs/nfsd/vfs.c
@@ -240,6 +240,9 @@
err = nfsd_lookup_dentry(rqstp, fhp, name, len, &exp, &dentry);
if (err)
return err;
+ err = check_nfsd_access(exp, rqstp);
+ if (err)
+ goto out;
/*
* Note: we compose the file handle now, but as the
* dentry may be negative, it may need to be updated.
@@ -247,6 +250,7 @@
err = fh_compose(resfh, exp, dentry, fhp);
if (!err && !dentry->d_inode)
err = nfserr_noent;
+out:
dput(dentry);
exp_put(exp);
return err;
