4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
31 * This file is part of Lustre, http://www.lustre.org/
32 * Lustre is a trademark of Sun Microsystems, Inc.
34 * lustre/include/linux/lvfs.h
36 * lustre VFS/process permission interface
39 #ifndef __LINUX_LVFS_H__
40 #define __LINUX_LVFS_H__
43 #error Do not #include this file directly. #include <lvfs.h> instead
46 #if defined __KERNEL__
47 #include <linux/lustre_compat25.h>
48 #include <linux/lvfs_linux.h>
50 #include <liblustre.h>
62 cfs_kernel_cap_t luc_cap;
64 struct group_info *luc_ginfo;
65 struct md_identity *luc_identity;
68 struct lvfs_callback_ops {
69 struct dentry *(*l_fid2dentry)(__u64 id_ino, __u32 gen, __u64 gr, void *data);
72 #define OBD_RUN_CTXT_MAGIC 0xC0FFEEAA
73 #define OBD_CTXT_DEBUG /* development-only debugging */
74 struct lvfs_run_ctxt {
75 struct vfsmount *pwdmnt;
78 struct lvfs_ucred luc;
80 struct lvfs_callback_ops cb_ops;
81 struct group_info *group_info;
88 #define OBD_SET_CTXT_MAGIC(ctxt) (ctxt)->magic = OBD_RUN_CTXT_MAGIC
90 #define OBD_SET_CTXT_MAGIC(ctxt) do {} while(0)
95 struct dentry *simple_mkdir(struct dentry *dir, struct vfsmount *mnt,
96 const char *name, int mode, int fix);
97 struct dentry *simple_mknod(struct dentry *dir, char *name, int mode, int fix);
98 int lustre_rename(struct dentry *dir, struct vfsmount *mnt, char *oldname,
100 int lustre_fread(struct file *file, void *buf, int len, loff_t *off);
101 int lustre_fwrite(struct file *file, const void *buf, int len, loff_t *off);
102 int lustre_fsync(struct file *file);
103 long l_readdir(struct file * file, cfs_list_t *dentry_list);
104 int l_notify_change(struct vfsmount *mnt, struct dentry *dchild,
105 struct iattr *newattrs);
106 int simple_truncate(struct dentry *dir, struct vfsmount *mnt,
107 char *name, loff_t length);
109 static inline void l_dput(struct dentry *de)
111 if (!de || IS_ERR(de))
113 //shrink_dcache_parent(de);
114 LASSERT(d_refcount(de) > 0);
118 /* We need to hold the inode semaphore over the dcache lookup itself, or we
119 * run the risk of entering the filesystem lookup path concurrently on SMP
120 * systems, and instantiating two inodes for the same entry. We still
121 * protect against concurrent addition/removal races with the DLM locking.
123 static inline struct dentry *ll_lookup_one_len(const char *fid_name,
124 struct dentry *dparent,
127 struct dentry *dchild;
129 mutex_lock(&dparent->d_inode->i_mutex);
130 dchild = lookup_one_len(fid_name, dparent, fid_namelen);
131 mutex_unlock(&dparent->d_inode->i_mutex);
133 if (IS_ERR(dchild) || dchild->d_inode == NULL)
136 if (is_bad_inode(dchild->d_inode)) {
137 CERROR("bad inode returned %lu/%u\n",
138 dchild->d_inode->i_ino, dchild->d_inode->i_generation);
140 dchild = ERR_PTR(-ENOENT);
145 static inline void ll_sleep(int t)
147 cfs_set_current_state(CFS_TASK_INTERRUPTIBLE);
148 cfs_schedule_timeout(t * CFS_HZ);
149 cfs_set_current_state(CFS_TASK_RUNNING);