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linux
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#ifdef pr_fmt
16#undef pr_fmt
17#endif
18
19#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
20
21#include <linux/kernel.h>
22#include <linux/param.h>
23#include <linux/mm.h>
24#include <linux/vmalloc.h>
25#include <linux/slab.h>
26#include <linux/wait.h>
27#include <linux/types.h>
28#include <linux/fs.h>
29#include "coda_fs_i.h"
30
31/* operations */
32extern const struct inode_operations coda_dir_inode_operations;
33extern const struct inode_operations coda_file_inode_operations;
34extern const struct inode_operations coda_ioctl_inode_operations;
35
36extern const struct dentry_operations coda_dentry_operations;
37
38extern const struct address_space_operations coda_file_aops;
39extern const struct address_space_operations coda_symlink_aops;
40
41extern const struct file_operations coda_dir_operations;
42extern const struct file_operations coda_file_operations;
43extern const struct file_operations coda_ioctl_operations;
44
45/* operations shared over more than one file */
46int coda_open(struct inode *i, struct file *f);
47int coda_release(struct inode *i, struct file *f);
48int coda_permission(struct inode *inode, int mask);
49int coda_revalidate_inode(struct inode *);
50int coda_getattr(const struct path *, struct kstat *, u32, unsigned int);
51int coda_setattr(struct dentry *, struct iattr *);
52
53/* this file: heloers */
54char *coda_f2s(struct CodaFid *f);
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 = kzalloc((unsigned long) size, GFP_KERNEL); \
68 else \
69 ptr = (cast)vzalloc((unsigned long) size); \
70 if (!ptr) \
71 pr_warn("kernel malloc returns 0 at %s:%d\n", __FILE__, __LINE__); \
72} while (0)
73
74
75#define CODA_FREE(ptr, size) kvfree((ptr))
76
77/* inode to cnode access functions */
78
79static inline struct coda_inode_info *ITOC(struct inode *inode)
80{
81 return container_of(inode, struct coda_inode_info, vfs_inode);
82}
83
84static __inline__ struct CodaFid *coda_i2f(struct inode *inode)
85{
86 return &(ITOC(inode)->c_fid);
87}
88
89static __inline__ char *coda_i2s(struct inode *inode)
90{
91 return coda_f2s(&(ITOC(inode)->c_fid));
92}
93
94/* this will not zap the inode away */
95static __inline__ void coda_flag_inode(struct inode *inode, int flag)
96{
97 struct coda_inode_info *cii = ITOC(inode);
98
99 spin_lock(&cii->c_lock);
100 cii->c_flags |= flag;
101 spin_unlock(&cii->c_lock);
102}
103
104#endif