ia64/linux-2.6.18-xen.hg

view fs/ocfs2/inode.h @ 524:7f8b544237bf

netfront: Allow netfront in domain 0.

This is useful if your physical network device is in a utility domain.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
author Keir Fraser <keir.fraser@citrix.com>
date Tue Apr 15 15:18:58 2008 +0100 (2008-04-15)
parents 831230e53067
children
line source
1 /* -*- mode: c; c-basic-offset: 8; -*-
2 * vim: noexpandtab sw=8 ts=8 sts=0:
3 *
4 * inode.h
5 *
6 * Function prototypes
7 *
8 * Copyright (C) 2002, 2004 Oracle. All rights reserved.
9 *
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public
12 * License as published by the Free Software Foundation; either
13 * version 2 of the License, or (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public
21 * License along with this program; if not, write to the
22 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
23 * Boston, MA 021110-1307, USA.
24 */
26 #ifndef OCFS2_INODE_H
27 #define OCFS2_INODE_H
29 /* OCFS2 Inode Private Data */
30 struct ocfs2_inode_info
31 {
32 u64 ip_blkno;
34 struct ocfs2_lock_res ip_rw_lockres;
35 struct ocfs2_lock_res ip_meta_lockres;
36 struct ocfs2_lock_res ip_data_lockres;
38 /* protects allocation changes on this inode. */
39 struct rw_semaphore ip_alloc_sem;
41 /* These fields are protected by ip_lock */
42 spinlock_t ip_lock;
43 u32 ip_open_count;
44 u32 ip_clusters;
45 struct ocfs2_extent_map ip_map;
46 struct list_head ip_io_markers;
47 int ip_orphaned_slot;
49 struct mutex ip_io_mutex;
51 /* Used by the journalling code to attach an inode to a
52 * handle. These are protected by ip_io_mutex in order to lock
53 * out other I/O to the inode until we either commit or
54 * abort. */
55 struct list_head ip_handle_list;
56 struct ocfs2_journal_handle *ip_handle;
58 u32 ip_flags; /* see below */
60 /* protected by recovery_lock. */
61 struct inode *ip_next_orphan;
63 u32 ip_dir_start_lookup;
65 /* next two are protected by trans_inc_lock */
66 /* which transaction were we created on? Zero if none. */
67 unsigned long ip_created_trans;
68 /* last transaction we were a part of. */
69 unsigned long ip_last_trans;
71 struct ocfs2_caching_info ip_metadata_cache;
73 struct inode vfs_inode;
74 };
76 /*
77 * Flags for the ip_flags field
78 */
79 /* System file inodes */
80 #define OCFS2_INODE_SYSTEM_FILE 0x00000001
81 #define OCFS2_INODE_JOURNAL 0x00000002
82 #define OCFS2_INODE_BITMAP 0x00000004
83 /* This inode has been wiped from disk */
84 #define OCFS2_INODE_DELETED 0x00000008
85 /* Another node is deleting, so our delete is a nop */
86 #define OCFS2_INODE_SKIP_DELETE 0x00000010
87 /* Has the inode been orphaned on another node?
88 *
89 * This hints to ocfs2_drop_inode that it should clear i_nlink before
90 * continuing.
91 *
92 * We *only* set this on unlink vote from another node. If the inode
93 * was locally orphaned, then we're sure of the state and don't need
94 * to twiddle i_nlink later - it's either zero or not depending on
95 * whether our unlink succeeded. Otherwise we got this from a node
96 * whose intention was to orphan the inode, however he may have
97 * crashed, failed etc, so we let ocfs2_drop_inode zero the value and
98 * rely on ocfs2_delete_inode to sort things out under the proper
99 * cluster locks.
100 */
101 #define OCFS2_INODE_MAYBE_ORPHANED 0x00000020
102 /* Does someone have the file open O_DIRECT */
103 #define OCFS2_INODE_OPEN_DIRECT 0x00000040
104 /* Indicates that the metadata cache should be used as an array. */
105 #define OCFS2_INODE_CACHE_INLINE 0x00000080
107 static inline struct ocfs2_inode_info *OCFS2_I(struct inode *inode)
108 {
109 return container_of(inode, struct ocfs2_inode_info, vfs_inode);
110 }
112 #define INODE_JOURNAL(i) (OCFS2_I(i)->ip_flags & OCFS2_INODE_JOURNAL)
113 #define SET_INODE_JOURNAL(i) (OCFS2_I(i)->ip_flags |= OCFS2_INODE_JOURNAL)
115 extern kmem_cache_t *ocfs2_inode_cache;
117 extern const struct address_space_operations ocfs2_aops;
119 struct buffer_head *ocfs2_bread(struct inode *inode, int block,
120 int *err, int reada);
121 void ocfs2_clear_inode(struct inode *inode);
122 void ocfs2_delete_inode(struct inode *inode);
123 void ocfs2_drop_inode(struct inode *inode);
124 struct inode *ocfs2_iget(struct ocfs2_super *osb, u64 feoff);
125 struct inode *ocfs2_ilookup_for_vote(struct ocfs2_super *osb,
126 u64 blkno,
127 int delete_vote);
128 int ocfs2_inode_init_private(struct inode *inode);
129 int ocfs2_inode_revalidate(struct dentry *dentry);
130 int ocfs2_populate_inode(struct inode *inode, struct ocfs2_dinode *fe,
131 int create_ino);
132 void ocfs2_read_inode(struct inode *inode);
133 void ocfs2_read_inode2(struct inode *inode, void *opaque);
134 ssize_t ocfs2_rw_direct(int rw, struct file *filp, char *buf,
135 size_t size, loff_t *offp);
136 void ocfs2_sync_blockdev(struct super_block *sb);
137 void ocfs2_refresh_inode(struct inode *inode,
138 struct ocfs2_dinode *fe);
139 int ocfs2_mark_inode_dirty(struct ocfs2_journal_handle *handle,
140 struct inode *inode,
141 struct buffer_head *bh);
142 int ocfs2_aio_read(struct file *file, struct kiocb *req, struct iocb *iocb);
143 int ocfs2_aio_write(struct file *file, struct kiocb *req, struct iocb *iocb);
145 #endif /* OCFS2_INODE_H */