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 */ };
41 int obd_alloc_fail(const void *ptr, const char *name, const char *type,
42 size_t size, const char *file, int line);
47 struct upcall_cache_entry *luc_uce;
56 struct lvfs_callback_ops {
57 struct dentry *(*l_fid2dentry)(__u64 id_ino, __u32 gen, __u64 gr, void *data);
60 #define OBD_RUN_CTXT_MAGIC 0xC0FFEEAA
61 #define OBD_CTXT_DEBUG /* development-only debugging */
62 struct lvfs_run_ctxt {
63 struct vfsmount *pwdmnt;
66 struct lvfs_ucred luc;
68 struct lvfs_callback_ops cb_ops;
69 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,4)
70 struct group_info *group_info;
72 struct group_info group_info;
80 #define OBD_SET_CTXT_MAGIC(ctxt) (ctxt)->magic = OBD_RUN_CTXT_MAGIC
82 #define OBD_SET_CTXT_MAGIC(ctxt) do {} while(0)
87 struct dentry *simple_mkdir(struct dentry *dir, char *name, int mode, int fix);
88 struct dentry *simple_mknod(struct dentry *dir, char *name, int mode, int fix);
89 int lustre_rename(struct dentry *dir, char *oldname, char *newname);
90 int lustre_fread(struct file *file, void *buf, int len, loff_t *off);
91 int lustre_fwrite(struct file *file, const void *buf, int len, loff_t *off);
92 int lustre_fsync(struct file *file);
93 long l_readdir(struct file * file, struct list_head *dentry_list);
95 static inline void l_dput(struct dentry *de)
97 if (!de || IS_ERR(de))
99 //shrink_dcache_parent(de);
100 LASSERT(atomic_read(&de->d_count) > 0);
104 /* We need to hold the inode semaphore over the dcache lookup itself, or we
105 * run the risk of entering the filesystem lookup path concurrently on SMP
106 * systems, and instantiating two inodes for the same entry. We still
107 * protect against concurrent addition/removal races with the DLM locking.
109 static inline struct dentry *ll_lookup_one_len(const char *fid_name,
110 struct dentry *dparent,
113 struct dentry *dchild;
115 LOCK_INODE_MUTEX(dparent->d_inode);
116 dchild = lookup_one_len(fid_name, dparent, fid_namelen);
117 UNLOCK_INODE_MUTEX(dparent->d_inode);
119 if (IS_ERR(dchild) || dchild->d_inode == NULL)
122 if (is_bad_inode(dchild->d_inode)) {
123 CERROR("bad inode returned %lu/%u\n",
124 dchild->d_inode->i_ino, dchild->d_inode->i_generation);
126 dchild = ERR_PTR(-ENOENT);
131 static inline void ll_sleep(int t)
133 set_current_state(TASK_INTERRUPTIBLE);
134 schedule_timeout(t * HZ);
135 set_current_state(TASK_RUNNING);