From: Greg Farnum <gregf@hq.newdream.net>
Date: Wed, 16 Sep 2009 00:32:01 +0000 (-0700)
Subject: uclient: First pass at encode_cap_release function; not used.
X-Git-Tag: v0.15~36
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=370223027b598e17132cef6ec57a7be3a6764187;p=ceph.git

uclient: First pass at encode_cap_release function; not used.
---

diff --git a/src/client/Client.cc b/src/client/Client.cc
index 70f302b0ed7..b1543ddb61f 100644
--- a/src/client/Client.cc
+++ b/src/client/Client.cc
@@ -909,24 +909,46 @@ inline MClientRequest* Client::make_request_from_Meta(MetaRequest *request)
   return req;
 }
 
-/*
-//call me from something that has client_lock held, I think
-void encode_cap_release(MetaRequest *req, int remove_cap,
-		       int unless_have_cap, Inode *in) {
-  dout(20) << "encode_cap_release " << remove_cap << " unless " << in
-	   << " has " << unless_have_cap << ". Inode caps are "
-	   << in->caps_issued() << dendl;
-  
-  ceph_mds_request_release release;
-  int caps = in->caps[x];
-  if ((caps & drop) && (caps & unless)==0) {
+/*This won't do anything if the MetaRequest doesn't have set:
+ *MClientRequest *request
+ *Inode *source
+ *int caps_dropped
+ */
+void Client::encode_cap_release(MetaRequest *req, int mds) {
+  Inode *in;
+  int caps;
+  if (!req->source) goto invalid_exit;
+  in = req->source;
+  caps = in->caps_issued();
+  dout(20) << "encode_cap_release " << req->caps_dropped << " unless "
+	   << in << " has " << req->unless_have_caps
+	   << ". Inode caps are " << caps << dendl;
+  if ( req->request &&                   //we need a request to bundle with
+       req->caps_dropped &&              //and caps to drop
+       (caps & req->caps_dropped) &&     //and to have some of those caps
+       !(caps & req->unless_have_caps) ) {//and to not have the 'saving' caps
+    InodeCap *icap = in->caps[mds];
     //encode message to drop the caps
-in->
-    dout(20) << "encode_inode_release quitting after encoding drop of "
-	     << remove_cap << " from inode " << in << dendl;
-  }
-  else dout(20) << "encode_cap_release is quitting because we don't need to drop!" << dendl;
-  } */
+    ceph_mds_request_release release;
+    icap->issued &= ~req->caps_dropped;
+    icap->implemented &= ~req->caps_dropped;
+    release.ino = in->ino;
+    release.cap_id = icap->cap_id;
+    release.caps = icap->issued;
+    release.wanted = icap->wanted;
+    release.seq = icap->seq;
+    release.issue_seq = icap->issue_seq;
+    release.mseq = icap->mseq;
+    release.dname_seq = 0;
+    release.dname_len = 0;
+    dout(20) << "encode_cap_release quitting after encoding drop of "
+	     << req->caps_dropped << " from inode " << in << dendl;
+    goto clean_exit;
+  }
+ invalid_exit:
+  dout(20) << "encode_cap_release is quitting because we don't need to drop!" << dendl;
+ clean_exit: ;
+}
 
 void Client::handle_client_session(MClientSession *m) 
 {
diff --git a/src/client/Client.h b/src/client/Client.h
index 38677434690..4b0364a56bb 100644
--- a/src/client/Client.h
+++ b/src/client/Client.h
@@ -98,6 +98,9 @@ struct MetaRequest {
   ceph_mds_request_head head;
   filepath path, path2;
   bufferlist data;
+  int caps_dropped; //the caps this operation will drop
+  int unless_have_caps; //unless we have these caps already
+
  
   utime_t  sent_stamp;
   int      mds;                // who i am asking
@@ -119,26 +122,28 @@ struct MetaRequest {
   Cond  *caller_cond;          // who to take up
   Cond  *dispatch_cond;        // who to kick back
 
-  Inode *source;
+  Inode *source; //Inode being affected -- useful for cap references
   Inode *target;
 
   MetaRequest(MClientRequest *req, tid_t t) : 
-    request(req), 
+    request(req), caps_dropped(0), unless_have_caps(0),
     resend_mds(-1), num_fwd(0), retry_attempt(0),
     ref(1), reply(0), 
     kick(false), got_safe(false), got_unsafe(false), unsafe_item(this),
     lock("MetaRequest lock"),
-    caller_cond(0), dispatch_cond(0), target(0) {
+    caller_cond(0), dispatch_cond(0),
+    source(0), target(0) {
     memcpy(&head, &req->head, sizeof(ceph_mds_request_head));
   }
 
   MetaRequest(int op) : 
-    request(NULL),
+    request(NULL), caps_dropped(0), unless_have_caps(0),
     resend_mds(-1), num_fwd(0), retry_attempt(0),
     ref(1), reply(0), 
     kick(false), got_safe(false), got_unsafe(false), unsafe_item(this),
     lock("MetaRequest lock"),
-    caller_cond(0), dispatch_cond(0), target(0) {
+    caller_cond(0), dispatch_cond(0),
+    source(0), target(0) {
     memset(&head, 0, sizeof(ceph_mds_request_head));
     head.op = op;
 }
@@ -815,8 +820,7 @@ public:
 		   //MClientRequest *req, int uid, int gid,
 		   Inode **ptarget = 0,
 		   int use_mds=-1, bufferlist *pdirbl=0);
-  void encode_cap_release(MetaRequest *request, MClientRequest *m,
-			 int unless_have_cap, Inode *in);
+  void encode_cap_release(MetaRequest *request, int mds);
   int choose_target_mds(MClientRequest *req);
   void send_request(MetaRequest *request, int mds);
   void kick_requests(int mds, bool signal);