1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3 * coda_fs_i.h
4 *
5 * Copyright (C) 1998 Carnegie Mellon University
6 *
7 */
8
9 #ifndef _LINUX_CODA_FS_I
10 #define _LINUX_CODA_FS_I
11
12 #include <linux/types.h>
13 #include <linux/list.h>
14 #include <linux/spinlock.h>
15 #include <linux/coda.h>
16
17 /*
18 * coda fs inode data
19 * c_lock protects accesses to c_flags, c_mapcount, c_cached_epoch, c_uid and
20 * c_cached_perm.
21 * vfs_inode is set only when the inode is created and never changes.
22 * c_fid is set when the inode is created and should be considered immutable.
23 */
24 struct coda_inode_info {
25 struct CodaFid c_fid; /* Coda identifier */
26 u_short c_flags; /* flags (see below) */
27 unsigned int c_mapcount; /* nr of times this inode is mapped */
28 unsigned int c_cached_epoch; /* epoch for cached permissions */
29 kuid_t c_uid; /* fsuid for cached permissions */
30 unsigned int c_cached_perm; /* cached access permissions */
31 spinlock_t c_lock;
32 struct inode vfs_inode;
33 };
34
35 /*
36 * coda fs file private data
37 */
38 #define CODA_MAGIC 0xC0DAC0DA
39 struct coda_file_info {
40 int cfi_magic; /* magic number */
41 struct file *cfi_container; /* container file for this cnode */
42 unsigned int cfi_mapcount; /* nr of times this file is mapped */
43 bool cfi_access_intent; /* is access intent supported */
44 };
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
52 struct inode *coda_cnode_make(struct CodaFid *, struct super_block *);
53 struct inode *coda_iget(struct super_block *sb, struct CodaFid *fid, struct coda_vattr *attr);
54 struct inode *coda_cnode_makectl(struct super_block *sb);
55 struct inode *coda_fid_to_inode(struct CodaFid *fid, struct super_block *sb);
56 struct coda_file_info *coda_ftoc(struct file *file);
57 void coda_replace_fid(struct inode *, struct CodaFid *, struct CodaFid *);
58
59 #endif