From 84a8d367a7ee02a22fac8c778846c9dad33b1cd9 Mon Sep 17 00:00:00 2001
From: yangsheng <yangsheng>
Date: Fri, 17 Oct 2008 07:47:49 +0000
Subject: [PATCH] Branch b1_8_gate b=17151 i=nathan, adilger patch provide by
 LLNL

Validate ptlrpc body checksum before swabbing.
---
 lustre/ptlrpc/pack_generic.c | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/lustre/ptlrpc/pack_generic.c b/lustre/ptlrpc/pack_generic.c
index 0364d8d..7d8aec5 100644
--- a/lustre/ptlrpc/pack_generic.c
+++ b/lustre/ptlrpc/pack_generic.c
@@ -68,7 +68,7 @@ static inline int lustre_msg_hdr_size_v2(int count)
         return size_round(offsetof(struct lustre_msg_v2, lm_buflens[count]));
 }
 
-static int lustre_msg_need_swab(struct lustre_msg *msg)
+int lustre_msg_need_swab(struct lustre_msg *msg)
 {
         return (msg->lm_magic == LUSTRE_MSG_MAGIC_V1_SWABBED) ||
                (msg->lm_magic == LUSTRE_MSG_MAGIC_V2_SWABBED);
@@ -914,6 +914,20 @@ static inline int lustre_unpack_ptlrpc_body_v2(struct lustre_msg_v2 *m,
         return 0;
 }
 
+int lustre_unpack_msg_ptlrpc_body(struct lustre_msg *msg,
+                                  int offset, int swab_needed)
+{
+        switch (msg->lm_magic) {
+        case LUSTRE_MSG_MAGIC_V1:
+                return 0;
+        case LUSTRE_MSG_MAGIC_V2:
+                return lustre_unpack_ptlrpc_body_v2(msg, offset, swab_needed);
+        default:
+                CERROR("incorrect message magic: %08x\n", msg->lm_magic);
+                return -EINVAL;
+        }
+}
+
 int lustre_unpack_req_ptlrpc_body(struct ptlrpc_request *req, int offset)
 {
         switch (req->rq_reqmsg->lm_magic) {
-- 
1.8.3.1