From: Yehuda Sadeh <yehuda@redhat.com>
Date: Wed, 5 Nov 2014 21:28:02 +0000 (-0800)
Subject: rgw: send back ETag on S3 object copy
X-Git-Tag: v0.80.9~22^2~6
X-Git-Url: http://git.apps.os.sepia.ceph.com/?a=commitdiff_plain;h=8682d1b15e097ececd927dfbd096dbb46403afca;p=ceph.git

rgw: send back ETag on S3 object copy

Fixes: #9479
Backport: firefly, giant
We didn't send the etag back correctly. Original code assumed the etag
resided in the attrs, but attrs only contained request attrs.

Signed-off-by: Yehuda Sadeh <yehuda@redhat.com>
(cherry picked from commit b1bfc3a7e0c9088f01f8ff770ae14f569fbc570d)

Conflicts:
	src/rgw/rgw_rados.cc
---

diff --git a/src/rgw/rgw_op.cc b/src/rgw/rgw_op.cc
index 457791fac3101..0d4f2deaeb8f6 100644
--- a/src/rgw/rgw_op.cc
+++ b/src/rgw/rgw_op.cc
@@ -2208,6 +2208,7 @@ void RGWCopyObj::execute()
                         replace_attrs,
                         attrs, RGW_OBJ_CATEGORY_MAIN,
                         &s->req_id, /* use req_id as tag */
+                        &etag,
                         &s->err,
                         copy_obj_progress_cb, (void *)this
                         );
diff --git a/src/rgw/rgw_op.h b/src/rgw/rgw_op.h
index b141ed5bd1bcd..f48ffdc15527c 100644
--- a/src/rgw/rgw_op.h
+++ b/src/rgw/rgw_op.h
@@ -490,6 +490,7 @@ protected:
   string source_zone;
   string client_id;
   string op_id;
+  string etag;
 
   off_t last_ofs;
 
diff --git a/src/rgw/rgw_rados.cc b/src/rgw/rgw_rados.cc
index 62d44aad66931..eb9bf99e0668b 100644
--- a/src/rgw/rgw_rados.cc
+++ b/src/rgw/rgw_rados.cc
@@ -3141,6 +3141,7 @@ int RGWRados::copy_obj(void *ctx,
                map<string, bufferlist>& attrs,
                RGWObjCategory category,
                string *ptag,
+               string *petag,
                struct rgw_err *err,
                void (*progress_cb)(off_t, void *),
                void *progress_data)
@@ -3237,6 +3238,10 @@ int RGWRados::copy_obj(void *ctx,
     if (ret < 0)
       goto set_err_state;
 
+    if (petag) {
+      *petag = etag;
+    }
+
     { /* opening scope so that we can do goto, sorry */
       bufferlist& extra_data_bl = processor.get_extra_data();
       if (extra_data_bl.length()) {
@@ -3302,6 +3307,10 @@ set_err_state:
     if (ret < 0)
       return ret;
 
+    if (petag) {
+      *petag = etag;
+    }
+
     return 0;
   }
   
@@ -3331,7 +3340,7 @@ set_err_state:
   }
 
   if (copy_data) { /* refcounting tail wouldn't work here, just copy the data */
-    return copy_obj_data(ctx, dest_bucket_info.owner, &handle, end, dest_obj, src_obj, max_chunk_size, mtime, src_attrs, category, ptag, err);
+    return copy_obj_data(ctx, dest_bucket_info.owner, &handle, end, dest_obj, src_obj, max_chunk_size, mtime, src_attrs, category, ptag, petag, err);
   }
 
   RGWObjManifest::obj_iterator miter = astate->manifest.obj_begin();
@@ -3410,6 +3419,14 @@ set_err_state:
   if (mtime)
     obj_stat(ctx, dest_obj, NULL, mtime, NULL, NULL, NULL, NULL);
 
+  if (petag) {
+    map<string, bufferlist>::iterator iter = src_attrs.find(RGW_ATTR_ETAG);
+    if (iter != src_attrs.end()) {
+      bufferlist& etagbl = iter->second;
+      *petag = string(etagbl.c_str(), etagbl.length());
+    }
+  }
+
   return 0;
 
 done_ret:
@@ -3446,6 +3463,7 @@ int RGWRados::copy_obj_data(void *ctx,
                map<string, bufferlist>& attrs,
                RGWObjCategory category,
                string *ptag,
+               string *petag,
                struct rgw_err *err)
 {
   bufferlist first_chunk;
@@ -3492,6 +3510,9 @@ int RGWRados::copy_obj_data(void *ctx,
   if (iter != attrs.end()) {
     bufferlist& bl = iter->second;
     etag = string(bl.c_str(), bl.length());
+    if (petag) {
+      *petag = etag;
+    }
   }
 
   ret = processor.complete(etag, NULL, 0, attrs);
diff --git a/src/rgw/rgw_rados.h b/src/rgw/rgw_rados.h
index 9aefe1efee98e..ff161b837a76a 100644
--- a/src/rgw/rgw_rados.h
+++ b/src/rgw/rgw_rados.h
@@ -1566,6 +1566,7 @@ public:
                map<std::string, bufferlist>& attrs,
                RGWObjCategory category,
                string *ptag,
+               string *petag,
                struct rgw_err *err,
                void (*progress_cb)(off_t, void *),
                void *progress_data);
@@ -1580,6 +1581,7 @@ public:
                map<string, bufferlist>& attrs,
                RGWObjCategory category,
                string *ptag,
+               string *petag,
                struct rgw_err *err);
   /**
    * Delete a bucket.
diff --git a/src/rgw/rgw_rest_s3.cc b/src/rgw/rgw_rest_s3.cc
index bc6305e8ce443..68b379fbb068e 100644
--- a/src/rgw/rgw_rest_s3.cc
+++ b/src/rgw/rgw_rest_s3.cc
@@ -1285,13 +1285,8 @@ void RGWCopyObj_ObjStore_S3::send_response()
 
   if (ret == 0) {
     dump_time(s, "LastModified", &mtime);
-    map<string, bufferlist>::iterator iter = attrs.find(RGW_ATTR_ETAG);
-    if (iter != attrs.end()) {
-      bufferlist& bl = iter->second;
-      if (bl.length()) {
-        char *etag = bl.c_str();
-        s->formatter->dump_string("ETag", etag);
-      }
+    if (!etag.empty()) {
+      s->formatter->dump_string("ETag", etag);
     }
     s->formatter->close_section();
     rgw_flush_formatter_and_reset(s, s->formatter);