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
60