X-Git-Url: https://git.whamcloud.com/?a=blobdiff_plain;f=lustre%2Finclude%2Flvfs.h;h=be4187f042b18c8cf4992bb1015cc83db9716aa8;hb=3cc79c2fb5cdfb8e7a0eef45cf4794923a898493;hp=96110fddef9ffaec18b66bf2d84c1a39eb45ba68;hpb=e903932500fc08b143467ce5a1c2702df35d8f0f;p=fs%2Flustre-release.git

diff --git a/lustre/include/lvfs.h b/lustre/include/lvfs.h
index 96110fd..be4187f 100644
--- a/lustre/include/lvfs.h
+++ b/lustre/include/lvfs.h
@@ -1,22 +1,39 @@
-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
+/*
+ * GPL HEADER START
  *
- *  Copyright (C) 2001 Cluster File Systems, Inc. <braam@clusterfs.com>
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
- *   This file is part of Lustre, http://www.lustre.org.
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 only,
+ * as published by the Free Software Foundation.
  *
- *   Lustre is free software; you can redistribute it and/or
- *   modify it under the terms of version 2 of the GNU General Public
- *   License as published by the Free Software Foundation.
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License version 2 for more details (a copy is included
+ * in the LICENSE file that accompanied this code).
  *
- *   Lustre is distributed in the hope that it will be useful,
- *   but WITHOUT ANY WARRANTY; without even the implied warranty of
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *   GNU General Public License for more details.
+ * 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
  *
- *   You should have received a copy of the GNU General Public License
- *   along with Lustre; if not, write to the Free Software
- *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ * 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.
+ *
+ * GPL HEADER END
+ */
+/*
+ * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Use is subject to license terms.
+ *
+ * Copyright (c) 2014, Intel Corporation.
+ */
+/*
+ * This file is part of Lustre, http://www.lustre.org/
+ * Lustre is a trademark of Sun Microsystems, Inc.
+ *
+ * lustre/include/lvfs.h
  *
  * lustre VFS/process permission interface
  */
@@ -24,38 +41,66 @@
 #ifndef __LVFS_H__
 #define __LVFS_H__
 
-#define LL_FID_NAMELEN (16 + 1 + 8 + 1)
-
-#include <libcfs/libcfs.h>
-#if defined(__linux__)
-#include <linux/lvfs.h>
-#elif defined(__APPLE__)
-#include <darwin/lvfs.h>
-#elif defined(__WINNT__)
-#include <winnt/lvfs.h>
-#else
-#error Unsupported operating system.
-#endif
+#include <linux/dcache.h>
+#include <linux/err.h>
+#include <linux/fs.h>
+#include <linux/mutex.h>
+#include <linux/namei.h>
+#include <lustre_compat.h>
 
-#include <lustre_ucache.h>
+#define OBD_RUN_CTXT_MAGIC	0xC0FFEEAA
+#define OBD_CTXT_DEBUG		/* development-only debugging */
 
+struct dt_device;
 
-#ifdef LIBLUSTRE
-#include <lvfs_user_fs.h>
+struct lvfs_run_ctxt {
+	struct vfsmount		*pwdmnt;
+	struct dentry		*pwd;
+	mm_segment_t		 fs;
+	int			 umask;
+	struct dt_device	*dt;
+#ifdef OBD_CTXT_DEBUG
+	unsigned int		 magic;
 #endif
+};
 
-/* lvfs_common.c */
-struct dentry *lvfs_fid2dentry(struct lvfs_run_ctxt *, __u64, __u32, __u64 ,void *data);
-
-void push_ctxt(struct lvfs_run_ctxt *save, struct lvfs_run_ctxt *new_ctx,
-               struct lvfs_ucred *cred);
-void pop_ctxt(struct lvfs_run_ctxt *saved, struct lvfs_run_ctxt *new_ctx,
-              struct lvfs_ucred *cred);
+static inline void OBD_SET_CTXT_MAGIC(struct lvfs_run_ctxt *ctxt)
+{
+#ifdef OBD_CTXT_DEBUG
+	ctxt->magic = OBD_RUN_CTXT_MAGIC;
+#endif
+}
 
+/* ptlrpc_sec_ctx.c */
+void push_ctxt(struct lvfs_run_ctxt *save, struct lvfs_run_ctxt *new_ctx);
+void pop_ctxt(struct lvfs_run_ctxt *saved, struct lvfs_run_ctxt *new_ctx);
 
-static inline int ll_fid2str(char *str, __u64 id, __u32 generation)
+/* We need to hold the inode semaphore over the dcache lookup itself, or we
+ * run the risk of entering the filesystem lookup path concurrently on SMP
+ * systems, and instantiating two inodes for the same entry.  We still
+ * protect against concurrent addition/removal races with the DLM locking.
+ */
+static inline struct dentry *
+ll_lookup_one_len(const char *fid_name, struct dentry *dparent,
+		  int fid_namelen)
 {
-        return sprintf(str, "%llx:%08x", (unsigned long long)id, generation);
+	struct dentry *dchild;
+
+	mutex_lock(&dparent->d_inode->i_mutex);
+	dchild = lookup_one_len(fid_name, dparent, fid_namelen);
+	mutex_unlock(&dparent->d_inode->i_mutex);
+
+	if (IS_ERR(dchild) || dchild->d_inode == NULL)
+		return dchild;
+
+	if (is_bad_inode(dchild->d_inode)) {
+		CERROR("bad inode returned %lu/%u\n",
+		       dchild->d_inode->i_ino, dchild->d_inode->i_generation);
+		dput(dchild);
+		dchild = ERR_PTR(-ENOENT);
+	}
+
+	return dchild;
 }
 
 #endif