lockd: Update the NLMv4 SHARE arguments decoder to use struct xdr_stream

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>

diff --git a/fs/lockd/xdr4.c b/fs/lockd/xdr4.c
index 2dbf82c2726be0c3c9eff91612e62dddee2e4c50..e6bab1d1e41fb55488a0886fde109bd573b94880 100644 (file)
--- a/fs/lockd/xdr4.c
+++ b/fs/lockd/xdr4.c
@@ -42,37 +42,6 @@ loff_t_to_s64(loff_t offset)
        return res;
 }
 
-/*
- * XDR functions for basic NLM types
- */
-static __be32 *
-nlm4_decode_cookie(__be32 *p, struct nlm_cookie *c)
-{
-       unsigned int    len;
-
-       len = ntohl(*p++);
-       
-       if(len==0)
-       {
-               c->len=4;
-               memset(c->data, 0, 4);  /* hockeypux brain damage */
-       }
-       else if(len<=NLM_MAXCOOKIELEN)
-       {
-               c->len=len;
-               memcpy(c->data, p, len);
-               p+=XDR_QUADLEN(len);
-       }
-       else 
-       {
-               dprintk("lockd: bad cookie size %d (only cookies under "
-                       "%d bytes are supported.)\n",
-                               len, NLM_MAXCOOKIELEN);
-               return NULL;
-       }
-       return p;
-}
-
 static __be32 *
 nlm4_encode_cookie(__be32 *p, struct nlm_cookie *c)
 {
@@ -82,20 +51,6 @@ nlm4_encode_cookie(__be32 *p, struct nlm_cookie *c)
        return p;
 }
 
-static __be32 *
-nlm4_decode_fh(__be32 *p, struct nfs_fh *f)
-{
-       memset(f->data, 0, sizeof(f->data));
-       f->size = ntohl(*p++);
-       if (f->size > NFS_MAXFHSIZE) {
-               dprintk("lockd: bad fhandle size %d (should be <=%d)\n",
-                       f->size, NFS_MAXFHSIZE);
-               return NULL;
-       }
-       memcpy(f->data, p, f->size);
-       return p + XDR_QUADLEN(f->size);
-}
-
 /*
  * NLM file handles are defined by specification to be a variable-length
  * XDR opaque no longer than 1024 bytes. However, this implementation
@@ -122,15 +77,6 @@ svcxdr_decode_fhandle(struct xdr_stream *xdr, struct nfs_fh *fh)
        return true;
 }
 
-/*
- * Encode and decode owner handle
- */
-static __be32 *
-nlm4_decode_oh(__be32 *p, struct xdr_netobj *oh)
-{
-       return xdr_decode_netobj(p, oh);
-}
-
 static bool
 svcxdr_decode_lock(struct xdr_stream *xdr, struct nlm_lock *lock)
 {
@@ -335,35 +281,42 @@ nlm4svc_decode_reboot(struct svc_rqst *rqstp, __be32 *p)
        return 1;
 }
 
-int
-nlm4svc_encode_testres(struct svc_rqst *rqstp, __be32 *p)
-{
-       struct nlm_res *resp = rqstp->rq_resp;
-
-       if (!(p = nlm4_encode_testres(p, resp)))
-               return 0;
-       return xdr_ressize_check(rqstp, p);
-}
-
 int
 nlm4svc_decode_shareargs(struct svc_rqst *rqstp, __be32 *p)
 {
+       struct xdr_stream *xdr = &rqstp->rq_arg_stream;
        struct nlm_args *argp = rqstp->rq_argp;
        struct nlm_lock *lock = &argp->lock;
 
        memset(lock, 0, sizeof(*lock));
        locks_init_lock(&lock->fl);
-       lock->svid = ~(u32) 0;
+       lock->svid = ~(u32)0;
 
-       if (!(p = nlm4_decode_cookie(p, &argp->cookie))
-        || !(p = xdr_decode_string_inplace(p, &lock->caller,
-                                           &lock->len, NLM_MAXSTRLEN))
-        || !(p = nlm4_decode_fh(p, &lock->fh))
-        || !(p = nlm4_decode_oh(p, &lock->oh)))
+       if (!svcxdr_decode_cookie(xdr, &argp->cookie))
                return 0;
-       argp->fsm_mode = ntohl(*p++);
-       argp->fsm_access = ntohl(*p++);
-       return xdr_argsize_check(rqstp, p);
+       if (!svcxdr_decode_string(xdr, &lock->caller, &lock->len))
+               return 0;
+       if (!svcxdr_decode_fhandle(xdr, &lock->fh))
+               return 0;
+       if (!svcxdr_decode_owner(xdr, &lock->oh))
+               return 0;
+       /* XXX: Range checks are missing in the original code */
+       if (xdr_stream_decode_u32(xdr, &argp->fsm_mode) < 0)
+               return 0;
+       if (xdr_stream_decode_u32(xdr, &argp->fsm_access) < 0)
+               return 0;
+
+       return 1;
+}
+
+int
+nlm4svc_encode_testres(struct svc_rqst *rqstp, __be32 *p)
+{
+       struct nlm_res *resp = rqstp->rq_resp;
+
+       if (!(p = nlm4_encode_testres(p, resp)))
+               return 0;
+       return xdr_ressize_check(rqstp, p);
 }
 
 int