From bcb97268f5e21c6aa1a2127f6d7f75d84b3f4dd8 Mon Sep 17 00:00:00 2001
From: yury <yury>
Date: Fri, 8 Sep 2006 10:22:13 +0000
Subject: [PATCH] - MSG_RESENT support in FLD.

---
 lustre/fld/fld_handler.c  | 22 ++++++++++++++++++++--
 lustre/fld/fld_internal.h |  6 ++++++
 2 files changed, 26 insertions(+), 2 deletions(-)

diff --git a/lustre/fld/fld_handler.c b/lustre/fld/fld_handler.c
index e10de82..5903d7a 100644
--- a/lustre/fld/fld_handler.c
+++ b/lustre/fld/fld_handler.c
@@ -121,7 +121,8 @@ EXPORT_SYMBOL(fld_server_lookup);
 
 static int fld_server_handle(struct lu_server_fld *fld,
                              const struct lu_context *ctx,
-                             __u32 opc, struct md_fld *mf)
+                             __u32 opc, struct md_fld *mf,
+                             struct fld_thread_info *info)
 {
         int rc;
         ENTRY;
@@ -130,9 +131,17 @@ static int fld_server_handle(struct lu_server_fld *fld,
         case FLD_CREATE:
                 rc = fld_server_create(fld, ctx,
                                        mf->mf_seq, mf->mf_mds);
+
+                /* do not return -EEXIST error for resent case */
+                if ((info->fti_flags & FLD_MSG_RESENT) && rc == -EEXIST)
+                        rc = 0;
                 break;
         case FLD_DELETE:
                 rc = fld_server_delete(fld, ctx, mf->mf_seq);
+
+                /* do not return -ENOENT error for resent case */
+                if ((info->fti_flags & FLD_MSG_RESENT) && rc == -ENOENT)
+                        rc = 0;
                 break;
         case FLD_LOOKUP:
                 rc = fld_server_lookup(fld, ctx,
@@ -171,9 +180,16 @@ static int fld_req_handle(struct ptlrpc_request *req,
                 if (out == NULL)
                         RETURN(-EPROTO);
                 *out = *in;
+
+                if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY)
+                        info->fti_flags |= FLD_MSG_REPLAY;
+
+                if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_RESENT)
+                        info->fti_flags |= FLD_MSG_RESENT;
+                
                 rc = fld_server_handle(site->ls_server_fld,
                                        req->rq_svc_thread->t_ctx,
-                                       *opc, out);
+                                       *opc, out, info);
         }
 
         RETURN(rc);
@@ -184,6 +200,8 @@ static void fld_thread_info_init(struct ptlrpc_request *req,
 {
         int i;
 
+        info->fti_flags = 0;
+        
         /* mark rep buffer as req-layout stuff expects */
         for (i = 0; i < ARRAY_SIZE(info->fti_rep_buf_size); i++)
                 info->fti_rep_buf_size[i] = -1;
diff --git a/lustre/fld/fld_internal.h b/lustre/fld/fld_internal.h
index d7cbef5..7a12f3c 100644
--- a/lustre/fld/fld_internal.h
+++ b/lustre/fld/fld_internal.h
@@ -50,12 +50,18 @@ enum {
 
 extern struct lu_fld_hash fld_hash[];
 
+enum {
+        FLD_MSG_RESENT = 1 << 0,
+        FLD_MSG_REPLAY = 1 << 1
+};
+
 #ifdef __KERNEL__
 struct fld_thread_info {
         struct req_capsule fti_pill;
         int                fti_rep_buf_size[REQ_MAX_FIELD_NR];
         __u64              fti_key;
         __u64              fti_rec;
+        __u32              fti_flags;
 };
 
 int fld_index_init(struct lu_server_fld *fld,
-- 
1.8.3.1