Root/fs/coda/coda_linux.h

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 "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 dentry_operations coda_dentry_operations;
31
32extern const struct address_space_operations coda_file_aops;
33extern const struct address_space_operations coda_symlink_aops;
34
35extern const struct file_operations coda_dir_operations;
36extern const struct file_operations coda_file_operations;
37extern const struct file_operations coda_ioctl_operations;
38
39/* operations shared over more than one file */
40int coda_open(struct inode *i, struct file *f);
41int coda_release(struct inode *i, struct file *f);
42int coda_permission(struct inode *inode, int mask, unsigned int flags);
43int coda_revalidate_inode(struct dentry *);
44int coda_getattr(struct vfsmount *, struct dentry *, struct kstat *);
45int coda_setattr(struct dentry *, struct iattr *);
46
47/* this file: heloers */
48char *coda_f2s(struct CodaFid *f);
49int coda_isroot(struct inode *i);
50int coda_iscontrol(const char *name, size_t length);
51
52void coda_vattr_to_iattr(struct inode *, struct coda_vattr *);
53void coda_iattr_to_vattr(struct iattr *, struct coda_vattr *);
54unsigned short coda_flags_to_cflags(unsigned short);
55
56/* sysctl.h */
57void coda_sysctl_init(void);
58void coda_sysctl_clean(void);
59
60#define CODA_ALLOC(ptr, cast, size) do { \
61    if (size < PAGE_SIZE) \
62        ptr = kmalloc((unsigned long) size, GFP_KERNEL); \
63    else \
64        ptr = (cast)vmalloc((unsigned long) size); \
65    if (!ptr) \
66        printk("kernel malloc returns 0 at %s:%d\n", __FILE__, __LINE__); \
67    else memset( ptr, 0, size ); \
68} while (0)
69
70
71#define CODA_FREE(ptr,size) \
72    do { if (size < PAGE_SIZE) kfree((ptr)); else vfree((ptr)); } while (0)
73
74/* inode to cnode access functions */
75
76static inline struct coda_inode_info *ITOC(struct inode *inode)
77{
78    return list_entry(inode, struct coda_inode_info, vfs_inode);
79}
80
81static __inline__ struct CodaFid *coda_i2f(struct inode *inode)
82{
83    return &(ITOC(inode)->c_fid);
84}
85
86static __inline__ char *coda_i2s(struct inode *inode)
87{
88    return coda_f2s(&(ITOC(inode)->c_fid));
89}
90
91/* this will not zap the inode away */
92static __inline__ void coda_flag_inode(struct inode *inode, int flag)
93{
94    struct coda_inode_info *cii = ITOC(inode);
95
96    spin_lock(&cii->c_lock);
97    cii->c_flags |= flag;
98    spin_unlock(&cii->c_lock);
99}
100
101#endif
102

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