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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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 */
Arjan van de Venc5ef1c42007-02-12 00:55:40 -080026extern 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;
Linus Torvalds1da177e2005-04-16 15:20:36 -070029
Christoph Hellwigf5e54d62006-06-28 04:26:44 -070030extern const struct address_space_operations coda_file_aops;
31extern const struct address_space_operations coda_symlink_aops;
Linus Torvalds1da177e2005-04-16 15:20:36 -070032
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -080033extern const struct file_operations coda_dir_operations;
34extern const struct file_operations coda_file_operations;
35extern const struct file_operations coda_ioctl_operations;
Linus Torvalds1da177e2005-04-16 15:20:36 -070036
37/* operations shared over more than one file */
38int coda_open(struct inode *i, struct file *f);
Linus Torvalds1da177e2005-04-16 15:20:36 -070039int coda_release(struct inode *i, struct file *f);
Nick Pigginb74c79e2011-01-07 17:49:58 +110040int coda_permission(struct inode *inode, int mask, unsigned int flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -070041int coda_revalidate_inode(struct dentry *);
42int coda_getattr(struct vfsmount *, struct dentry *, struct kstat *);
43int coda_setattr(struct dentry *, struct iattr *);
44
Linus Torvalds1da177e2005-04-16 15:20:36 -070045/* this file: heloers */
Linus Torvalds1da177e2005-04-16 15:20:36 -070046char *coda_f2s(struct CodaFid *f);
47int coda_isroot(struct inode *i);
48int coda_iscontrol(const char *name, size_t length);
49
50void coda_vattr_to_iattr(struct inode *, struct coda_vattr *);
51void coda_iattr_to_vattr(struct iattr *, struct coda_vattr *);
52unsigned short coda_flags_to_cflags(unsigned short);
53
54/* sysctl.h */
55void coda_sysctl_init(void);
56void coda_sysctl_clean(void);
57
58#define CODA_ALLOC(ptr, cast, size) do { \
59 if (size < PAGE_SIZE) \
Robert P. J. Day5cbded52006-12-13 00:35:56 -080060 ptr = kmalloc((unsigned long) size, GFP_KERNEL); \
Linus Torvalds1da177e2005-04-16 15:20:36 -070061 else \
62 ptr = (cast)vmalloc((unsigned long) size); \
63 if (!ptr) \
64 printk("kernel malloc returns 0 at %s:%d\n", __FILE__, __LINE__); \
65 else memset( ptr, 0, size ); \
66} while (0)
67
68
69#define CODA_FREE(ptr,size) \
70 do { if (size < PAGE_SIZE) kfree((ptr)); else vfree((ptr)); } while (0)
71
72/* inode to cnode access functions */
73
74static inline struct coda_inode_info *ITOC(struct inode *inode)
75{
76 return list_entry(inode, struct coda_inode_info, vfs_inode);
77}
78
79static __inline__ struct CodaFid *coda_i2f(struct inode *inode)
80{
81 return &(ITOC(inode)->c_fid);
82}
83
84static __inline__ char *coda_i2s(struct inode *inode)
85{
86 return coda_f2s(&(ITOC(inode)->c_fid));
87}
88
89/* this will not zap the inode away */
90static __inline__ void coda_flag_inode(struct inode *inode, int flag)
91{
Yoshihisa Abeb5ce1d82010-10-25 02:03:44 -040092 struct coda_inode_info *cii = ITOC(inode);
93
94 spin_lock(&cii->c_lock);
95 cii->c_flags |= flag;
96 spin_unlock(&cii->c_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -070097}
98
99#endif