1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 only,
10 * as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
18 * You should have received a copy of the GNU General Public License
19 * version 2 along with this program; If not, see
20 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
29 * Copyright 2008 Sun Microsystems, Inc. All rights reserved
30 * Use is subject to license terms.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * lustre/include/linux/lvfs.h
38 * lustre VFS/process permission interface
41 #ifndef __LINUX_LVFS_H__
42 #define __LINUX_LVFS_H__
45 #error Do not #include this file directly. #include <lvfs.h> instead
48 #if defined __KERNEL__
49 #include <linux/lustre_compat25.h>
50 #include <linux/lvfs_linux.h>
52 struct group_info { /* unused */ };
53 #include <liblustre.h>
65 cfs_kernel_cap_t luc_cap;
67 struct group_info *luc_ginfo;
68 struct md_identity *luc_identity;
71 struct lvfs_callback_ops {
72 struct dentry *(*l_fid2dentry)(__u64 id_ino, __u32 gen, __u64 gr, void *data);
75 #define OBD_RUN_CTXT_MAGIC 0xC0FFEEAA
76 #define OBD_CTXT_DEBUG /* development-only debugging */
77 struct lvfs_run_ctxt {
78 struct vfsmount *pwdmnt;
81 struct lvfs_ucred luc;
83 struct lvfs_callback_ops cb_ops;
84 struct group_info *group_info;
91 #define OBD_SET_CTXT_MAGIC(ctxt) (ctxt)->magic = OBD_RUN_CTXT_MAGIC
93 #define OBD_SET_CTXT_MAGIC(ctxt) do {} while(0)
98 struct dentry *simple_mkdir(struct dentry *dir, struct vfsmount *mnt,
99 const char *name, int mode, int fix);
100 struct dentry *simple_mknod(struct dentry *dir, char *name, int mode, int fix);
101 int lustre_rename(struct dentry *dir, struct vfsmount *mnt, char *oldname,
103 int lustre_fread(struct file *file, void *buf, int len, loff_t *off);
104 int lustre_fwrite(struct file *file, const void *buf, int len, loff_t *off);
105 int lustre_fsync(struct file *file);
106 long l_readdir(struct file * file, struct list_head *dentry_list);
108 static inline void l_dput(struct dentry *de)
110 if (!de || IS_ERR(de))
112 //shrink_dcache_parent(de);
113 LASSERT(atomic_read(&de->d_count) > 0);
117 /* We need to hold the inode semaphore over the dcache lookup itself, or we
118 * run the risk of entering the filesystem lookup path concurrently on SMP
119 * systems, and instantiating two inodes for the same entry. We still
120 * protect against concurrent addition/removal races with the DLM locking.
122 static inline struct dentry *ll_lookup_one_len(const char *fid_name,
123 struct dentry *dparent,
126 struct dentry *dchild;
128 LOCK_INODE_MUTEX(dparent->d_inode);
129 dchild = lookup_one_len(fid_name, dparent, fid_namelen);
130 UNLOCK_INODE_MUTEX(dparent->d_inode);
132 if (IS_ERR(dchild) || dchild->d_inode == NULL)
135 if (is_bad_inode(dchild->d_inode)) {
136 CERROR("bad inode returned %lu/%u\n",
137 dchild->d_inode->i_ino, dchild->d_inode->i_generation);
139 dchild = ERR_PTR(-ENOENT);
144 static inline void ll_sleep(int t)
146 set_current_state(TASK_INTERRUPTIBLE);
147 schedule_timeout(t * HZ);
148 set_current_state(TASK_RUNNING);