From: Yan, Zheng <zyan@redhat.com>
Date: Tue, 15 Mar 2016 11:41:50 +0000 (+0800)
Subject: client: add debug hook for requesting caps on open/lookup/getattr
X-Git-Tag: v10.1.1~116^2
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=13ae262086c5dd9a457d88fa89b86b1bcd9f9c81;p=ceph.git

client: add debug hook for requesting caps on open/lookup/getattr

Signed-off-by: Yan, Zheng <zyan@redhat.com>
---

diff --git a/src/client/Client.cc b/src/client/Client.cc
index 31f31f86e99..b6dace83b07 100644
--- a/src/client/Client.cc
+++ b/src/client/Client.cc
@@ -128,6 +128,8 @@ using namespace std;
 #define O_DIRECT 0x0
 #endif
 
+#define DEBUG_GETATTR_CAPS (CEPH_CAP_XATTR_SHARED)
+
 void client_flush_set_callback(void *p, ObjectCacher::ObjectSet *oset)
 {
   Client *client = static_cast<Client*>(p);
@@ -1231,6 +1233,18 @@ Inode* Client::insert_trace(MetaRequest *request, MetaSession *session)
   Inode *in = 0;
   if (reply->head.is_target) {
     ist.decode(p, features);
+    if (cct->_conf->client_debug_getattr_caps) {
+      int op = request->get_op();
+      unsigned wanted = 0;
+      if (op == CEPH_MDS_OP_GETATTR || op == CEPH_MDS_OP_LOOKUP)
+	wanted = request->head.args.getattr.mask;
+      else if (op == CEPH_MDS_OP_OPEN || op == CEPH_MDS_OP_OPEN)
+	wanted = request->head.args.open.mask;
+
+      if ((wanted & CEPH_CAP_XATTR_SHARED) &&
+	  !(ist.xattr_version > 0 && ist.xattrbl.length() > 0))
+	  assert(0 == "MDS reply does not contain xattrs");
+    }
 
     in = add_update_inode(&ist, request->sent_stamp, session);
   }
@@ -5670,7 +5684,11 @@ int Client::_do_lookup(Inode *dir, const string& name, InodeRef *target,
   path.push_dentry(name);
   req->set_filepath(path);
   req->set_inode(dir);
-  req->head.args.getattr.mask = 0;
+  if (cct->_conf->client_debug_getattr_caps && op == CEPH_MDS_OP_LOOKUP)
+      req->head.args.getattr.mask = DEBUG_GETATTR_CAPS;
+  else
+      req->head.args.getattr.mask = 0;
+
   ldout(cct, 10) << "_do_lookup on " << path << dendl;
 
   int r = make_request(req, uid, gid, target);
@@ -7631,6 +7649,10 @@ int Client::_open(Inode *in, int flags, mode_t mode, Fh **fhp, int uid, int gid)
     req->head.args.open.flags = flags & ~O_CREAT;
     req->head.args.open.mode = mode;
     req->head.args.open.pool = -1;
+    if (cct->_conf->client_debug_getattr_caps)
+      req->head.args.open.mask = DEBUG_GETATTR_CAPS;
+    else
+      req->head.args.open.mask = 0;
     req->head.args.open.old_size = in->size;   // for O_TRUNC
     req->set_inode(in);
     result = make_request(req, uid, gid);
@@ -7893,7 +7915,7 @@ retry:
   }
 
   if (!conf->client_debug_force_sync_read &&
-      (cct->_conf->client_oc && (have & CEPH_CAP_FILE_CACHE))) {
+      (conf->client_oc && (have & CEPH_CAP_FILE_CACHE))) {
 
     if (f->flags & O_RSYNC) {
       _flush_range(in, offset, size);
@@ -10319,6 +10341,10 @@ int Client::_create(Inode *dir, const char *name, int flags, mode_t mode,
   req->head.args.open.stripe_unit = stripe_unit;
   req->head.args.open.stripe_count = stripe_count;
   req->head.args.open.object_size = object_size;
+  if (cct->_conf->client_debug_getattr_caps)
+    req->head.args.open.mask = DEBUG_GETATTR_CAPS;
+  else
+    req->head.args.open.mask = 0;
   req->head.args.open.pool = pool_id;
   req->dentry_drop = CEPH_CAP_FILE_SHARED;
   req->dentry_unless = CEPH_CAP_FILE_EXCL;
diff --git a/src/common/config_opts.h b/src/common/config_opts.h
index a0ae4955ebc..9c5d909ea1a 100644
--- a/src/common/config_opts.h
+++ b/src/common/config_opts.h
@@ -380,6 +380,7 @@ OPTION(client_oc_max_dirty, OPT_INT, 1024*1024* 100)    // MB * n  (dirty OR tx.
 OPTION(client_oc_target_dirty, OPT_INT, 1024*1024* 8) // target dirty (keep this smallish)
 OPTION(client_oc_max_dirty_age, OPT_DOUBLE, 5.0)      // max age in cache before writeback
 OPTION(client_oc_max_objects, OPT_INT, 1000)      // max objects in cache
+OPTION(client_debug_getattr_caps, OPT_BOOL, false) // check if MDS reply contains wanted caps
 OPTION(client_debug_force_sync_read, OPT_BOOL, false)     // always read synchronously (go to osds)
 OPTION(client_debug_inject_tick_delay, OPT_INT, 0) // delay the client tick for a number of seconds
 OPTION(client_max_inline_size, OPT_U64, 4096)