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1/*
2 * Coda File System, Linux Kernel module
3 *
4 * Original version, adapted from cfs_mach.c, (C) Carnegie Mellon University
5 * Linux modifications (C) 1996, Peter J. Braam
6 * Rewritten for Linux 2.1 (C) 1997 Carnegie Mellon University
7 *
8 * Carnegie Mellon University encourages users of this software to
9 * contribute improvements to the Coda project.
10 */
11
12#ifndef _LINUX_CODA_FS
13#define _LINUX_CODA_FS
14
15#include <linux/kernel.h>
16#include <linux/param.h>
17#include <linux/mm.h>
18#include <linux/vmalloc.h>
19#include <linux/slab.h>
20#include <linux/wait.h>
21#include <linux/types.h>
22#include <linux/fs.h>
23#include <linux/coda_fs_i.h>
24
25/* operations */
26extern struct inode_operations coda_dir_inode_operations;
27extern struct inode_operations coda_file_inode_operations;
28extern struct inode_operations coda_ioctl_inode_operations;
29
30extern struct address_space_operations coda_file_aops;
31extern struct address_space_operations coda_symlink_aops;
32
33extern struct file_operations coda_dir_operations;
34extern struct file_operations coda_file_operations;
35extern struct file_operations coda_ioctl_operations;
36
37/* operations shared over more than one file */
38int coda_open(struct inode *i, struct file *f);
39int coda_flush(struct file *f);
40int coda_release(struct inode *i, struct file *f);
41int coda_permission(struct inode *inode, int mask, struct nameidata *nd);
42int coda_revalidate_inode(struct dentry *);
43int coda_getattr(struct vfsmount *, struct dentry *, struct kstat *);
44int coda_setattr(struct dentry *, struct iattr *);
45
46/* global variables */
47extern int coda_fake_statfs;
48
49/* this file: heloers */
50static __inline__ struct CodaFid *coda_i2f(struct inode *);
51static __inline__ char *coda_i2s(struct inode *);
52static __inline__ void coda_flag_inode(struct inode *, int flag);
53char *coda_f2s(struct CodaFid *f);
54int coda_isroot(struct inode *i);
55int coda_iscontrol(const char *name, size_t length);
56
57void coda_vattr_to_iattr(struct inode *, struct coda_vattr *);
58void coda_iattr_to_vattr(struct iattr *, struct coda_vattr *);
59unsigned short coda_flags_to_cflags(unsigned short);
60
61/* sysctl.h */
62void coda_sysctl_init(void);
63void coda_sysctl_clean(void);
64
65#define CODA_ALLOC(ptr, cast, size) do { \
66 if (size < PAGE_SIZE) \
67 ptr = (cast)kmalloc((unsigned long) size, GFP_KERNEL); \
68 else \
69 ptr = (cast)vmalloc((unsigned long) size); \
70 if (!ptr) \
71 printk("kernel malloc returns 0 at %s:%d\n", __FILE__, __LINE__); \
72 else memset( ptr, 0, size ); \
73} while (0)
74
75
76#define CODA_FREE(ptr,size) \
77 do { if (size < PAGE_SIZE) kfree((ptr)); else vfree((ptr)); } while (0)
78
79/* inode to cnode access functions */
80
81static inline struct coda_inode_info *ITOC(struct inode *inode)
82{
83 return list_entry(inode, struct coda_inode_info, vfs_inode);
84}
85
86static __inline__ struct CodaFid *coda_i2f(struct inode *inode)
87{
88 return &(ITOC(inode)->c_fid);
89}
90
91static __inline__ char *coda_i2s(struct inode *inode)
92{
93 return coda_f2s(&(ITOC(inode)->c_fid));
94}
95
96/* this will not zap the inode away */
97static __inline__ void coda_flag_inode(struct inode *inode, int flag)
98{
99 ITOC(inode)->c_flags |= flag;
100}
101
102#endif