1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * Copyright (C) 2001 Cluster File Systems, Inc. <braam@clusterfs.com>
6 * This file is part of Lustre, http://www.lustre.org.
8 * Lustre is free software; you can redistribute it and/or
9 * modify it under the terms of version 2 of the GNU General Public
10 * License as published by the Free Software Foundation.
12 * Lustre is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with Lustre; if not, write to the Free Software
19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 * lustre VFS/process permission interface
24 #ifndef __LINUX_LVFS_H__
25 #define __LINUX_LVFS_H__
28 #error Do not #include this file directly. #include <lvfs.h> instead
31 #if defined __KERNEL__
32 #include <linux/lustre_compat25.h>
33 #include <linux/lvfs_linux.h>
35 struct group_info { /* unused */ };
36 #include <liblustre.h>
50 struct group_info *luc_ginfo;
51 struct mdt_identity *luc_identity;
54 struct lvfs_callback_ops {
55 struct dentry *(*l_fid2dentry)(__u64 id_ino, __u32 gen, __u64 gr, void *data);
58 #define OBD_RUN_CTXT_MAGIC 0xC0FFEEAA
59 #define OBD_CTXT_DEBUG /* development-only debugging */
60 struct lvfs_run_ctxt {
61 struct vfsmount *pwdmnt;
64 struct lvfs_ucred luc;
66 struct lvfs_callback_ops cb_ops;
67 struct group_info *group_info;
74 #define OBD_SET_CTXT_MAGIC(ctxt) (ctxt)->magic = OBD_RUN_CTXT_MAGIC
76 #define OBD_SET_CTXT_MAGIC(ctxt) do {} while(0)
81 struct dentry *simple_mkdir(struct dentry *dir, char *name, int mode, int fix);
82 struct dentry *simple_mknod(struct dentry *dir, char *name, int mode, int fix);
83 int lustre_rename(struct dentry *dir, char *oldname, char *newname);
84 int lustre_fread(struct file *file, void *buf, int len, loff_t *off);
85 int lustre_fwrite(struct file *file, const void *buf, int len, loff_t *off);
86 int lustre_fsync(struct file *file);
87 long l_readdir(struct file * file, struct list_head *dentry_list);
89 static inline void l_dput(struct dentry *de)
91 if (!de || IS_ERR(de))
93 //shrink_dcache_parent(de);
94 LASSERT(atomic_read(&de->d_count) > 0);
98 /* We need to hold the inode semaphore over the dcache lookup itself, or we
99 * run the risk of entering the filesystem lookup path concurrently on SMP
100 * systems, and instantiating two inodes for the same entry. We still
101 * protect against concurrent addition/removal races with the DLM locking.
103 static inline struct dentry *ll_lookup_one_len(const char *fid_name,
104 struct dentry *dparent,
107 struct dentry *dchild;
109 LOCK_INODE_MUTEX(dparent->d_inode);
110 dchild = lookup_one_len(fid_name, dparent, fid_namelen);
111 UNLOCK_INODE_MUTEX(dparent->d_inode);
113 if (IS_ERR(dchild) || dchild->d_inode == NULL)
116 if (is_bad_inode(dchild->d_inode)) {
117 CERROR("bad inode returned %lu/%u\n",
118 dchild->d_inode->i_ino, dchild->d_inode->i_generation);
120 dchild = ERR_PTR(-ENOENT);
125 static inline void ll_sleep(int t)
127 set_current_state(TASK_INTERRUPTIBLE);
128 schedule_timeout(t * HZ);
129 set_current_state(TASK_RUNNING);