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 */
 34static inline ino_t
 35cifs_uniqueid_to_ino_t(u64 fileid)
 36{
 37	if ((sizeof(ino_t)) < (sizeof(u64)))
 38		return (ino_t)hash_64(fileid, (sizeof(ino_t) * 8) - 1) + 1;
 39
 40	return (ino_t)fileid;
 41
 42}
 43
 44static inline void cifs_set_time(struct dentry *dentry, unsigned long time)
 45{
 46	dentry->d_fsdata = (void *) time;
 47}
 48
 49static inline unsigned long cifs_get_time(struct dentry *dentry)
 50{
 51	return (unsigned long) dentry->d_fsdata;
 52}
 53
 54extern struct file_system_type cifs_fs_type;
 55extern const struct address_space_operations cifs_addr_ops;
 56extern const struct address_space_operations cifs_addr_ops_smallbuf;
 57
 58/* Functions related to super block operations */
 59extern void cifs_sb_active(struct super_block *sb);
 60extern void cifs_sb_deactive(struct super_block *sb);
 61
 62/* Functions related to inodes */
 63extern const struct inode_operations cifs_dir_inode_ops;
 64extern struct inode *cifs_root_iget(struct super_block *);
 65extern int cifs_create(struct inode *, struct dentry *, umode_t,
 66		       bool excl);
 67extern int cifs_atomic_open(struct inode *, struct dentry *,
 68			    struct file *, unsigned, umode_t,
 69			    int *);
 70extern struct dentry *cifs_lookup(struct inode *, struct dentry *,
 71				  unsigned int);
 72extern int cifs_unlink(struct inode *dir, struct dentry *dentry);
 73extern int cifs_hardlink(struct dentry *, struct inode *, struct dentry *);
 74extern int cifs_mknod(struct inode *, struct dentry *, umode_t, dev_t);
 75extern int cifs_mkdir(struct inode *, struct dentry *, umode_t);
 76extern int cifs_rmdir(struct inode *, struct dentry *);
 77extern int cifs_rename2(struct inode *, struct dentry *, struct inode *,
 78			struct dentry *, unsigned int);
 79extern int cifs_revalidate_file_attr(struct file *filp);
 80extern int cifs_revalidate_dentry_attr(struct dentry *);
 81extern int cifs_revalidate_file(struct file *filp);
 82extern int cifs_revalidate_dentry(struct dentry *);
 83extern int cifs_invalidate_mapping(struct inode *inode);
 84extern int cifs_revalidate_mapping(struct inode *inode);
 85extern int cifs_zap_mapping(struct inode *inode);
 86extern int cifs_getattr(const struct path *, struct kstat *, u32, unsigned int);
 87extern int cifs_setattr(struct dentry *, struct iattr *);
 88
 89extern const struct inode_operations cifs_file_inode_ops;
 90extern const struct inode_operations cifs_symlink_inode_ops;
 91extern const struct inode_operations cifs_dfs_referral_inode_operations;
 92
 93
 94/* Functions related to files and directories */
 95extern const struct file_operations cifs_file_ops;
 96extern const struct file_operations cifs_file_direct_ops; /* if directio mnt */
 97extern const struct file_operations cifs_file_strict_ops; /* if strictio mnt */
 98extern const struct file_operations cifs_file_nobrl_ops; /* no brlocks */
 99extern const struct file_operations cifs_file_direct_nobrl_ops;
100extern const struct file_operations cifs_file_strict_nobrl_ops;
101extern int cifs_open(struct inode *inode, struct file *file);
102extern int cifs_close(struct inode *inode, struct file *file);
103extern int cifs_closedir(struct inode *inode, struct file *file);
104extern ssize_t cifs_user_readv(struct kiocb *iocb, struct iov_iter *to);
105extern ssize_t cifs_strict_readv(struct kiocb *iocb, struct iov_iter *to);
106extern ssize_t cifs_user_writev(struct kiocb *iocb, struct iov_iter *from);
107extern ssize_t cifs_strict_writev(struct kiocb *iocb, struct iov_iter *from);
108extern int cifs_lock(struct file *, int, struct file_lock *);
109extern int cifs_fsync(struct file *, loff_t, loff_t, int);
110extern int cifs_strict_fsync(struct file *, loff_t, loff_t, int);
111extern int cifs_flush(struct file *, fl_owner_t id);
112extern int cifs_file_mmap(struct file * , struct vm_area_struct *);
113extern int cifs_file_strict_mmap(struct file * , struct vm_area_struct *);
114extern const struct file_operations cifs_dir_ops;
115extern int cifs_dir_open(struct inode *inode, struct file *file);
116extern int cifs_readdir(struct file *file, struct dir_context *ctx);
117
118/* Functions related to dir entries */
119extern const struct dentry_operations cifs_dentry_ops;
120extern const struct dentry_operations cifs_ci_dentry_ops;
121
122#ifdef CONFIG_CIFS_DFS_UPCALL
123extern struct vfsmount *cifs_dfs_d_automount(struct path *path);
124#else
125#define cifs_dfs_d_automount NULL
126#endif
127
128/* Functions related to symlinks */
129extern const char *cifs_get_link(struct dentry *, struct inode *,
130			struct delayed_call *);
131extern int cifs_symlink(struct inode *inode, struct dentry *direntry,
132			const char *symname);
133
134#ifdef CONFIG_CIFS_XATTR
135extern const struct xattr_handler *cifs_xattr_handlers[];
136extern ssize_t	cifs_listxattr(struct dentry *, char *, size_t);
137#else
138# define cifs_xattr_handlers NULL
139# define cifs_listxattr NULL
140#endif
141
142extern ssize_t cifs_file_copychunk_range(unsigned int xid,
143					struct file *src_file, loff_t off,
144					struct file *dst_file, loff_t destoff,
145					size_t len, unsigned int flags);
146
147extern long cifs_ioctl(struct file *filep, unsigned int cmd, unsigned long arg);
148#ifdef CONFIG_CIFS_NFSD_EXPORT
149extern const struct export_operations cifs_export_ops;
150#endif /* CONFIG_CIFS_NFSD_EXPORT */
151
152#define CIFS_VERSION   "2.11"
153#endif				/* _CIFSFS_H */