[PATCH] knfsd: svcrpc: gss: factor out some common wrapping code

Factor out some common code from the integrity and privacy cases.

Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/net/sunrpc/auth_gss/svcauth_gss.c b/net/sunrpc/auth_gss/svcauth_gss.c
index 558692d7e4654aee475518b8d2c3f26c56e07be2..eeb1cce966499fb340ebb2b5e9e5585c7b54c061 100644 (file)
--- a/net/sunrpc/auth_gss/svcauth_gss.c
+++ b/net/sunrpc/auth_gss/svcauth_gss.c
@@ -1147,6 +1147,25 @@ out:
        return ret;
 }
 
+u32 *
+svcauth_gss_prepare_to_wrap(struct xdr_buf *resbuf, struct gss_svc_data *gsd)
+{
+       u32 *p;
+
+       p = gsd->body_start;
+       gsd->body_start = NULL;
+       /* move accept_stat to right place: */
+       memcpy(p, p + 2, 4);
+       /* Don't wrap in failure case: */
+       /* Counting on not getting here if call was not even accepted! */
+       if (*p != rpc_success) {
+               resbuf->head[0].iov_len -= 2 * 4;
+               return NULL;
+       }
+       p++;
+       return p;
+}
+
 static inline int
 svcauth_gss_wrap_resp_integ(struct svc_rqst *rqstp)
 {
@@ -1160,17 +1179,9 @@ svcauth_gss_wrap_resp_integ(struct svc_rqst *rqstp)
        int integ_offset, integ_len;
        int stat = -EINVAL;
 
-       p = gsd->body_start;
-       gsd->body_start = NULL;
-       /* move accept_stat to right place: */
-       memcpy(p, p + 2, 4);
-       /* Don't wrap in failure case: */
-       /* Counting on not getting here if call was not even accepted! */
-       if (*p != rpc_success) {
-               resbuf->head[0].iov_len -= 2 * 4;
+       p = svcauth_gss_prepare_to_wrap(resbuf, gsd);
+       if (p == NULL)
                goto out;
-       }
-       p++;
        integ_offset = (u8 *)(p + 1) - (u8 *)resbuf->head[0].iov_base;
        integ_len = resbuf->len - integ_offset;
        BUG_ON(integ_len % 4);
@@ -1222,17 +1233,9 @@ svcauth_gss_wrap_resp_priv(struct svc_rqst *rqstp)
        int offset;
        int pad;
 
-       p = gsd->body_start;
-       gsd->body_start = NULL;
-       /* move accept_stat to right place: */
-       memcpy(p, p + 2, 4);
-       /* Don't wrap in failure case: */
-       /* Counting on not getting here if call was not even accepted! */
-       if (*p != rpc_success) {
-               resbuf->head[0].iov_len -= 2 * 4;
+       p = svcauth_gss_prepare_to_wrap(resbuf, gsd);
+       if (p == NULL)
                return 0;
-       }
-       p++;
        len = p++;
        offset = (u8 *)p - (u8 *)resbuf->head[0].iov_base;
        *p++ = htonl(gc->gc_seq);