LU-14182 lov: cancel layout lock on replay deadlock

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

diff --git a/lustre/include/lustre_mdc.h b/lustre/include/lustre_mdc.h
index 9bc6934..3883993 100644 (file)
--- a/lustre/include/lustre_mdc.h
+++ b/lustre/include/lustre_mdc.h
@@ -1,6 +1,4 @@
-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
- *
+/*
  * GPL HEADER START
  *
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
@@ -17,11 +15,7 @@
  *
  * You should have received a copy of the GNU General Public License
  * 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
- * have any questions.
+ * http://www.gnu.org/licenses/gpl-2.0.html
  *
  * GPL HEADER END
  */
@@ -30,7 +24,7 @@
  * Use is subject to license terms.
  */
 /*
- * Copyright (c) 2012 Whamcloud, Inc.
+ * Copyright (c) 2011, 2014, Intel Corporation.
  */
 /*
  * This file is part of Lustre, http://www.lustre.org/
@@ -50,20 +44,18 @@
  * @{
  */
 
-#ifdef __KERNEL__
-# include <linux/fs.h>
-# include <linux/dcache.h>
-# ifdef CONFIG_FS_POSIX_ACL
-#  include <linux/posix_acl_xattr.h>
-# endif /* CONFIG_FS_POSIX_ACL */
-# include <linux/lustre_intent.h>
-#endif /* __KERNEL__ */
+#include <linux/fs.h>
+#include <linux/dcache.h>
+#ifdef CONFIG_LUSTRE_FS_POSIX_ACL
+# include <lustre_compat.h>
+#endif /* CONFIG_LUSTRE_FS_POSIX_ACL */
 #include <lustre_handles.h>
+#include <lustre_intent.h>
 #include <libcfs/libcfs.h>
-#include <lustre/lustre_idl.h>
+#include <obd_class.h>
+#include <uapi/linux/lustre/lustre_idl.h>
 #include <lustre_lib.h>
 #include <lustre_dlm.h>
-#include <lustre_log.h>
 #include <lustre_export.h>
 
 struct ptlrpc_client;
@@ -71,69 +63,54 @@ struct obd_export;
 struct ptlrpc_request;
 struct obd_device;
 
-struct mdc_rpc_lock {
-        cfs_semaphore_t  rpcl_sem;
-        struct lookup_intent *rpcl_it;
-};
-
-static inline void mdc_init_rpc_lock(struct mdc_rpc_lock *lck)
+/**
+ * Update the maximum possible easize.
+ *
+ * This value is learned from ptlrpc replies sent by the MDT.  The
+ * default easize is initialized to the minimum value but allowed to
+ * grow up to a single page in size if required to handle the common
+ * case.
+ *
+ * \see client_obd::cl_default_mds_easize
+ *
+ * \param[in] exp      export for MDC device
+ * \param[in] body     body of ptlrpc reply from MDT
+ *
+ */
+static inline void mdc_update_max_ea_from_body(struct obd_export *exp,
+                                              struct mdt_body *body)
 {
-        cfs_sema_init(&lck->rpcl_sem, 1);
-        lck->rpcl_it = NULL;
-}
+       if (body->mbo_valid & OBD_MD_FLMODEASIZE) {
+               struct client_obd *cli = &exp->exp_obd->u.cli;
+               __u32 def_easize;
 
-static inline void mdc_get_rpc_lock(struct mdc_rpc_lock *lck,
-                                    struct lookup_intent *it)
-{
-        ENTRY;
-        if (!it || (it->it_op != IT_GETATTR && it->it_op != IT_LOOKUP)) {
-                cfs_down(&lck->rpcl_sem);
-                LASSERT(lck->rpcl_it == NULL);
-                lck->rpcl_it = it;
-        }
+               if (cli->cl_max_mds_easize < body->mbo_max_mdsize)
+                       cli->cl_max_mds_easize = body->mbo_max_mdsize;
+
+               def_easize = min_t(__u32, body->mbo_max_mdsize,
+                                  OBD_MAX_DEFAULT_EA_SIZE);
+               cli->cl_default_mds_easize = def_easize;
+       }
 }
 
-static inline void mdc_put_rpc_lock(struct mdc_rpc_lock *lck,
-                                    struct lookup_intent *it)
+
+/* mdc/mdc_locks.c */
+int it_open_error(int phase, struct lookup_intent *it);
+
+static inline bool cl_is_lov_delay_create(unsigned int flags)
 {
-        if (!it || (it->it_op != IT_GETATTR && it->it_op != IT_LOOKUP)) {
-                LASSERT(it == lck->rpcl_it);
-                lck->rpcl_it = NULL;
-                cfs_up(&lck->rpcl_sem);
-        }
-        EXIT;
+       return  (flags & O_LOV_DELAY_CREATE_1_8) != 0 ||
+               (flags & O_LOV_DELAY_CREATE_MASK) == O_LOV_DELAY_CREATE_MASK;
 }
 
-static inline void mdc_update_max_ea_from_body(struct obd_export *exp,
-                                               struct mdt_body *body)
+static inline void cl_lov_delay_create_clear(unsigned int *flags)
 {
-        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;
-        }
+       if ((*flags & O_LOV_DELAY_CREATE_1_8) != 0)
+               *flags &= ~O_LOV_DELAY_CREATE_1_8;
+       if ((*flags & O_LOV_DELAY_CREATE_MASK) == O_LOV_DELAY_CREATE_MASK)
+               *flags &= ~O_LOV_DELAY_CREATE_MASK;
 }
 
-
-struct mdc_cache_waiter {
-        cfs_list_t              mcw_entry;
-        cfs_waitq_t             mcw_waitq;
-};
-
-/* mdc/mdc_locks.c */
-int it_disposition(struct lookup_intent *it, int flag);
-void it_clear_disposition(struct lookup_intent *it, int flag);
-void it_set_disposition(struct lookup_intent *it, int flag);
-int it_open_error(int phase, struct lookup_intent *it);
-#ifdef HAVE_SPLIT_SUPPORT
-int mdc_sendpage(struct obd_export *exp, const struct lu_fid *fid,
-                 const struct page *page, int offset);
-#endif
-
 /** @} mdc */
 
 #endif