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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 const struct inode_operations coda_dir_inode_operations;
27extern const struct inode_operations coda_file_inode_operations;
28extern const struct inode_operations coda_ioctl_inode_operations;
29
30extern const struct address_space_operations coda_file_aops;
31extern const struct address_space_operations coda_symlink_aops;
32
33extern const struct file_operations coda_dir_operations;
34extern const struct file_operations coda_file_operations;
35extern const 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_release(struct inode *i, struct file *f);
40int coda_permission(struct inode *inode, int mask, struct nameidata *nd);
41int coda_revalidate_inode(struct dentry *);
42int coda_getattr(struct vfsmount *, struct dentry *, struct kstat *);
43int coda_setattr(struct dentry *, struct iattr *);
44
45/* this file: heloers */
46static __inline__ struct CodaFid *coda_i2f(struct inode *);
47static __inline__ char *coda_i2s(struct inode *);
48static __inline__ void coda_flag_inode(struct inode *, int flag);
49char *coda_f2s(struct CodaFid *f);
50int coda_isroot(struct inode *i);
51int coda_iscontrol(const char *name, size_t length);
52
53void coda_vattr_to_iattr(struct inode *, struct coda_vattr *);
54void coda_iattr_to_vattr(struct iattr *, struct coda_vattr *);
55unsigned short coda_flags_to_cflags(unsigned short);
56
57/* sysctl.h */
58void coda_sysctl_init(void);
59void coda_sysctl_clean(void);
60
61#define CODA_ALLOC(ptr, cast, size) do { \
62 if (size < PAGE_SIZE) \
63 ptr = kmalloc((unsigned long) size, GFP_KERNEL); \
64 else \
65 ptr = (cast)vmalloc((unsigned long) size); \
66 if (!ptr) \
67 printk("kernel malloc returns 0 at %s:%d\n", __FILE__, __LINE__); \
68 else memset( ptr, 0, size ); \
69} while (0)
70
71
72#define CODA_FREE(ptr,size) \
73 do { if (size < PAGE_SIZE) kfree((ptr)); else vfree((ptr)); } while (0)
74
75/* inode to cnode access functions */
76
77static inline struct coda_inode_info *ITOC(struct inode *inode)
78{
79 return list_entry(inode, struct coda_inode_info, vfs_inode);
80}
81
82static __inline__ struct CodaFid *coda_i2f(struct inode *inode)
83{
84 return &(ITOC(inode)->c_fid);
85}
86
87static __inline__ char *coda_i2s(struct inode *inode)
88{
89 return coda_f2s(&(ITOC(inode)->c_fid));
90}
91
92/* this will not zap the inode away */
93static __inline__ void coda_flag_inode(struct inode *inode, int flag)
94{
95 ITOC(inode)->c_flags |= flag;
96}
97
98#endif