LU-1214 ldlm: splits server specific lock handling from client

[fs/lustre-release.git] / lustre / include / lustre_mdc.h

diff --git a/lustre/include/lustre_mdc.h b/lustre/include/lustre_mdc.h
index 44b9df3..c241c30 100644 (file)
--- a/lustre/include/lustre_mdc.h
+++ b/lustre/include/lustre_mdc.h
@@ -16,8 +16,8 @@
  * in the LICENSE file that accompanied this code).
  *
  * You should have received a copy of the GNU General Public License
- * version 2 along with this program; If not, see [sun.com URL with a
- * copy of GPLv2].
+ * version 2 along with this program; If not, see
+ * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  *
  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  * CA 95054 USA or visit www.sun.com if you need additional information or
@@ -26,10 +26,13 @@
  * GPL HEADER END
  */
 /*
- * Copyright  2008 Sun Microsystems, Inc. All rights reserved
+ * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
  * Use is subject to license terms.
  */
 /*
+ * Copyright (c) 2012 Whamcloud, Inc.
+ */
+/*
  * This file is part of Lustre, http://www.lustre.org/
  * Lustre is a trademark of Sun Microsystems, Inc.
  *
@@ -42,20 +45,18 @@
 #ifndef _LUSTRE_MDC_H
 #define _LUSTRE_MDC_H
 
+/** \defgroup mdc mdc
+ *
+ * @{
+ */
+
 #ifdef __KERNEL__
 # include <linux/fs.h>
 # include <linux/dcache.h>
 # ifdef CONFIG_FS_POSIX_ACL
-#  ifdef HAVE_XATTR_ACL
-#   include <linux/xattr_acl.h>
-#  endif /*HAVE_XATTR_ACL */
-#  ifdef HAVE_LINUX_POSIX_ACL_XATTR_H
-#   include <linux/posix_acl_xattr.h>
-#  endif /* HAVE_LINUX_POSIX_ACL_XATTR_H */
+#  include <linux/posix_acl_xattr.h>
 # endif /* CONFIG_FS_POSIX_ACL */
-# ifndef HAVE_VFS_INTENT_PATCHES
 # include <linux/lustre_intent.h>
-# endif /* HAVE_VFS_INTENT_PATCHES */
 #endif /* __KERNEL__ */
 #include <lustre_handles.h>
 #include <libcfs/libcfs.h>
@@ -71,13 +72,13 @@ struct ptlrpc_request;
 struct obd_device;
 
 struct mdc_rpc_lock {
-        struct semaphore rpcl_sem;
+        cfs_mutex_t           rpcl_mutex;
         struct lookup_intent *rpcl_it;
 };
 
 static inline void mdc_init_rpc_lock(struct mdc_rpc_lock *lck)
 {
-        sema_init(&lck->rpcl_sem, 1);
+        cfs_mutex_init(&lck->rpcl_mutex);
         lck->rpcl_it = NULL;
 }
 
@@ -86,7 +87,7 @@ static inline void mdc_get_rpc_lock(struct mdc_rpc_lock *lck,
 {
         ENTRY;
         if (!it || (it->it_op != IT_GETATTR && it->it_op != IT_LOOKUP)) {
-                down(&lck->rpcl_sem);
+                cfs_mutex_lock(&lck->rpcl_mutex);
                 LASSERT(lck->rpcl_it == NULL);
                 lck->rpcl_it = it;
         }
@@ -98,13 +99,28 @@ static inline void mdc_put_rpc_lock(struct mdc_rpc_lock *lck,
         if (!it || (it->it_op != IT_GETATTR && it->it_op != IT_LOOKUP)) {
                 LASSERT(it == lck->rpcl_it);
                 lck->rpcl_it = NULL;
-                up(&lck->rpcl_sem);
+                cfs_mutex_unlock(&lck->rpcl_mutex);
         }
         EXIT;
 }
 
-struct mdc_cache_waiter {       
-        struct list_head        mcw_entry;
+static inline void mdc_update_max_ea_from_body(struct obd_export *exp,
+                                               struct mdt_body *body)
+{
+        if (body->valid & OBD_MD_FLMODEASIZE) {
+                if (exp->exp_obd->u.cli.cl_max_mds_easize < body->max_mdsize)
+                        exp->exp_obd->u.cli.cl_max_mds_easize =
+                                                body->max_mdsize;
+                if (exp->exp_obd->u.cli.cl_max_mds_cookiesize <
+                                                body->max_cookiesize)
+                        exp->exp_obd->u.cli.cl_max_mds_cookiesize =
+                                                body->max_cookiesize;
+        }
+}
+
+
+struct mdc_cache_waiter {
+        cfs_list_t              mcw_entry;
         cfs_waitq_t             mcw_waitq;
 };
 
@@ -117,4 +133,7 @@ int it_open_error(int phase, struct lookup_intent *it);
 int mdc_sendpage(struct obd_export *exp, const struct lu_fid *fid,
                  const struct page *page, int offset);
 #endif
+
+/** @} mdc */
+
 #endif