1/*
2 *   fs/cifs/cifsfs.h
3 *
4 *   Copyright (c) International Business Machines  Corp., 2002, 2007
5 *   Author(s): Steve French (sfrench@us.ibm.com)
6 *
7 *   This library is free software; you can redistribute it and/or modify
8 *   it under the terms of the GNU Lesser General Public License as published
9 *   by the Free Software Foundation; either version 2.1 of the License, or
10 *   (at your option) any later version.
11 *
12 *   This library is distributed in the hope that it will be useful,
13 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
14 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
15 *   the GNU Lesser General Public License for more details.
16 *
17 *   You should have received a copy of the GNU Lesser General Public License
18 *   along with this library; if not, write to the Free Software
19 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 */
21
22#ifndef _CIFSFS_H
23#define _CIFSFS_H
24
25#include <linux/hash.h>
26
27#define ROOT_I 2
28
29/*
30 * ino_t is 32-bits on 32-bit arch. We have to squash the 64-bit value down
31 * so that it will fit. We use hash_64 to convert the value to 31 bits, and
32 * then add 1, to ensure that we don't end up with a 0 as the value.
33 */
34#if BITS_PER_LONG == 64
35static inline ino_t
36cifs_uniqueid_to_ino_t(u64 fileid)
37{
38	return (ino_t)fileid;
39}
40#else
41static inline ino_t
42cifs_uniqueid_to_ino_t(u64 fileid)
43{
44	return (ino_t)hash_64(fileid, (sizeof(ino_t) * 8) - 1) + 1;
45}
46#endif
47
48extern struct file_system_type cifs_fs_type;
49extern const struct address_space_operations cifs_addr_ops;
50extern const struct address_space_operations cifs_addr_ops_smallbuf;
51
52/* Functions related to super block operations */
53extern void cifs_sb_active(struct super_block *sb);
54extern void cifs_sb_deactive(struct super_block *sb);
55
56/* Functions related to inodes */
57extern const struct inode_operations cifs_dir_inode_ops;
58extern struct inode *cifs_root_iget(struct super_block *);
59extern int cifs_create(struct inode *, struct dentry *, umode_t,
60		       bool excl);
61extern int cifs_atomic_open(struct inode *, struct dentry *,
62			    struct file *, unsigned, umode_t,
63			    int *);
64extern struct dentry *cifs_lookup(struct inode *, struct dentry *,
65				  unsigned int);
66extern int cifs_unlink(struct inode *dir, struct dentry *dentry);
67extern int cifs_hardlink(struct dentry *, struct inode *, struct dentry *);
68extern int cifs_mknod(struct inode *, struct dentry *, umode_t, dev_t);
69extern int cifs_mkdir(struct inode *, struct dentry *, umode_t);
70extern int cifs_rmdir(struct inode *, struct dentry *);
71extern int cifs_rename2(struct inode *, struct dentry *, struct inode *,
72			struct dentry *, unsigned int);
73extern int cifs_revalidate_file_attr(struct file *filp);
74extern int cifs_revalidate_dentry_attr(struct dentry *);
75extern int cifs_revalidate_file(struct file *filp);
76extern int cifs_revalidate_dentry(struct dentry *);
77extern int cifs_invalidate_mapping(struct inode *inode);
78extern int cifs_revalidate_mapping(struct inode *inode);
79extern int cifs_zap_mapping(struct inode *inode);
80extern int cifs_getattr(struct vfsmount *, struct dentry *, struct kstat *);
81extern int cifs_setattr(struct dentry *, struct iattr *);
82
83extern const struct inode_operations cifs_file_inode_ops;
84extern const struct inode_operations cifs_symlink_inode_ops;
85extern const struct inode_operations cifs_dfs_referral_inode_operations;
86
87
88/* Functions related to files and directories */
89extern const struct file_operations cifs_file_ops;
90extern const struct file_operations cifs_file_direct_ops; /* if directio mnt */
91extern const struct file_operations cifs_file_strict_ops; /* if strictio mnt */
92extern const struct file_operations cifs_file_nobrl_ops; /* no brlocks */
93extern const struct file_operations cifs_file_direct_nobrl_ops;
94extern const struct file_operations cifs_file_strict_nobrl_ops;
95extern int cifs_open(struct inode *inode, struct file *file);
96extern int cifs_close(struct inode *inode, struct file *file);
97extern int cifs_closedir(struct inode *inode, struct file *file);
98extern ssize_t cifs_user_readv(struct kiocb *iocb, struct iov_iter *to);
99extern ssize_t cifs_strict_readv(struct kiocb *iocb, struct iov_iter *to);
100extern ssize_t cifs_user_writev(struct kiocb *iocb, struct iov_iter *from);
101extern ssize_t cifs_strict_writev(struct kiocb *iocb, struct iov_iter *from);
102extern int cifs_lock(struct file *, int, struct file_lock *);
103extern int cifs_fsync(struct file *, loff_t, loff_t, int);
104extern int cifs_strict_fsync(struct file *, loff_t, loff_t, int);
105extern int cifs_flush(struct file *, fl_owner_t id);
106extern int cifs_file_mmap(struct file * , struct vm_area_struct *);
107extern int cifs_file_strict_mmap(struct file * , struct vm_area_struct *);
108extern const struct file_operations cifs_dir_ops;
109extern int cifs_dir_open(struct inode *inode, struct file *file);
110extern int cifs_readdir(struct file *file, struct dir_context *ctx);
111
112/* Functions related to dir entries */
113extern const struct dentry_operations cifs_dentry_ops;
114extern const struct dentry_operations cifs_ci_dentry_ops;
115
116#ifdef CONFIG_CIFS_DFS_UPCALL
117extern struct vfsmount *cifs_dfs_d_automount(struct path *path);
118#else
119#define cifs_dfs_d_automount NULL
120#endif
121
122/* Functions related to symlinks */
123extern void *cifs_follow_link(struct dentry *direntry, struct nameidata *nd);
124extern int cifs_readlink(struct dentry *direntry, char __user *buffer,
125			 int buflen);
126extern int cifs_symlink(struct inode *inode, struct dentry *direntry,
127			const char *symname);
128extern int	cifs_removexattr(struct dentry *, const char *);
129extern int	cifs_setxattr(struct dentry *, const char *, const void *,
130			size_t, int);
131extern ssize_t	cifs_getxattr(struct dentry *, const char *, void *, size_t);
132extern ssize_t	cifs_listxattr(struct dentry *, char *, size_t);
133extern long cifs_ioctl(struct file *filep, unsigned int cmd, unsigned long arg);
134
135#ifdef CONFIG_CIFS_NFSD_EXPORT
136extern const struct export_operations cifs_export_ops;
137#endif /* CONFIG_CIFS_NFSD_EXPORT */
138
139#define CIFS_VERSION   "2.05"
140#endif				/* _CIFSFS_H */
141