Root/fs/coda/coda_fs_i.h

1/*
2 * coda_fs_i.h
3 *
4 * Copyright (C) 1998 Carnegie Mellon University
5 *
6 */
7
8#ifndef _LINUX_CODA_FS_I
9#define _LINUX_CODA_FS_I
10
11#include <linux/types.h>
12#include <linux/list.h>
13#include <linux/spinlock.h>
14#include <linux/coda.h>
15
16/*
17 * coda fs inode data
18 * c_lock protects accesses to c_flags, c_mapcount, c_cached_epoch, c_uid and
19 * c_cached_perm.
20 * vfs_inode is set only when the inode is created and never changes.
21 * c_fid is set when the inode is created and should be considered immutable.
22 */
23struct coda_inode_info {
24    struct CodaFid c_fid; /* Coda identifier */
25    u_short c_flags; /* flags (see below) */
26    unsigned int c_mapcount; /* nr of times this inode is mapped */
27    unsigned int c_cached_epoch; /* epoch for cached permissions */
28    vuid_t c_uid; /* fsuid for cached permissions */
29    unsigned int c_cached_perm; /* cached access permissions */
30    spinlock_t c_lock;
31    struct inode vfs_inode;
32};
33
34/*
35 * coda fs file private data
36 */
37#define CODA_MAGIC 0xC0DAC0DA
38struct coda_file_info {
39    int cfi_magic; /* magic number */
40    struct file *cfi_container; /* container file for this cnode */
41    unsigned int cfi_mapcount; /* nr of times this file is mapped */
42};
43
44#define CODA_FTOC(file) ((struct coda_file_info *)((file)->private_data))
45
46/* flags */
47#define C_VATTR 0x1 /* Validity of vattr in inode */
48#define C_FLUSH 0x2 /* used after a flush */
49#define C_DYING 0x4 /* from venus (which died) */
50#define C_PURGE 0x8
51
52int coda_cnode_make(struct inode **, struct CodaFid *, struct super_block *);
53struct inode *coda_iget(struct super_block *sb, struct CodaFid *fid, struct coda_vattr *attr);
54int coda_cnode_makectl(struct inode **inode, struct super_block *sb);
55struct inode *coda_fid_to_inode(struct CodaFid *fid, struct super_block *sb);
56void coda_replace_fid(struct inode *, struct CodaFid *, struct CodaFid *);
57
58#endif
59

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