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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
Fabian Frederickf38cfb22014-06-06 14:36:19 -070015#ifdef pr_fmt
16#undef pr_fmt
17#endif
18
19#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
20
Linus Torvalds1da177e2005-04-16 15:20:36 -070021#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>
Al Viro31a203d2011-01-12 16:36:09 -050029#include "coda_fs_i.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070030
31/* operations */
Arjan van de Venc5ef1c42007-02-12 00:55:40 -080032extern 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;
Linus Torvalds1da177e2005-04-16 15:20:36 -070035
Al Viro9501e4c2011-01-12 16:25:02 -050036extern const struct dentry_operations coda_dentry_operations;
37
Christoph Hellwigf5e54d62006-06-28 04:26:44 -070038extern const struct address_space_operations coda_file_aops;
39extern const struct address_space_operations coda_symlink_aops;
Linus Torvalds1da177e2005-04-16 15:20:36 -070040
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -080041extern const struct file_operations coda_dir_operations;
42extern const struct file_operations coda_file_operations;
43extern const struct file_operations coda_ioctl_operations;
Linus Torvalds1da177e2005-04-16 15:20:36 -070044
45/* operations shared over more than one file */
46int coda_open(struct inode *i, struct file *f);
Linus Torvalds1da177e2005-04-16 15:20:36 -070047int coda_release(struct inode *i, struct file *f);
Al Viro10556cb2011-06-20 19:28:19 -040048int coda_permission(struct inode *inode, int mask);
Al Viro11d100d2013-10-04 18:17:02 -040049int coda_revalidate_inode(struct inode *);
Linus Torvalds1da177e2005-04-16 15:20:36 -070050int coda_getattr(struct vfsmount *, struct dentry *, struct kstat *);
51int coda_setattr(struct dentry *, struct iattr *);
52
Linus Torvalds1da177e2005-04-16 15:20:36 -070053/* this file: heloers */
Linus Torvalds1da177e2005-04-16 15:20:36 -070054char *coda_f2s(struct CodaFid *f);
Linus Torvalds1da177e2005-04-16 15:20:36 -070055int 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) \
Joe Perches558feb02011-05-28 10:36:33 -070067 ptr = kzalloc((unsigned long) size, GFP_KERNEL); \
Linus Torvalds1da177e2005-04-16 15:20:36 -070068 else \
Joe Perches558feb02011-05-28 10:36:33 -070069 ptr = (cast)vzalloc((unsigned long) size); \
Linus Torvalds1da177e2005-04-16 15:20:36 -070070 if (!ptr) \
Fabian Frederickd9b4b312014-06-06 14:36:18 -070071 pr_warn("kernel malloc returns 0 at %s:%d\n", __FILE__, __LINE__); \
Linus Torvalds1da177e2005-04-16 15:20:36 -070072} while (0)
73
74
75#define CODA_FREE(ptr,size) \
76 do { if (size < PAGE_SIZE) kfree((ptr)); else vfree((ptr)); } while (0)
77
78/* inode to cnode access functions */
79
80static inline struct coda_inode_info *ITOC(struct inode *inode)
81{
Rasmus Villemoesdb6172c2015-03-19 12:28:04 +010082 return container_of(inode, struct coda_inode_info, vfs_inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -070083}
84
85static __inline__ struct CodaFid *coda_i2f(struct inode *inode)
86{
87 return &(ITOC(inode)->c_fid);
88}
89
90static __inline__ char *coda_i2s(struct inode *inode)
91{
92 return coda_f2s(&(ITOC(inode)->c_fid));
93}
94
95/* this will not zap the inode away */
96static __inline__ void coda_flag_inode(struct inode *inode, int flag)
97{
Yoshihisa Abeb5ce1d82010-10-25 02:03:44 -040098 struct coda_inode_info *cii = ITOC(inode);
99
100 spin_lock(&cii->c_lock);
101 cii->c_flags |= flag;
102 spin_unlock(&cii->c_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103}
104
105#endif