LXR linux/fs/cifs/cifsfs.h

   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 user_namespace *, struct inode *,
  66                       struct dentry *, umode_t, bool excl);
  67extern int cifs_atomic_open(struct inode *, struct dentry *,
  68                            struct file *, unsigned, umode_t);
  69extern struct dentry *cifs_lookup(struct inode *, struct dentry *,
  70                                  unsigned int);
  71extern int cifs_unlink(struct inode *dir, struct dentry *dentry);
  72extern int cifs_hardlink(struct dentry *, struct inode *, struct dentry *);
  73extern int cifs_mknod(struct user_namespace *, struct inode *, struct dentry *,
  74                      umode_t, dev_t);
  75extern int cifs_mkdir(struct user_namespace *, struct inode *, struct dentry *,
  76                      umode_t);
  77extern int cifs_rmdir(struct inode *, struct dentry *);
  78extern int cifs_rename2(struct user_namespace *, struct inode *,
  79                        struct dentry *, struct inode *, struct dentry *,
  80                        unsigned int);
  81extern int cifs_revalidate_file_attr(struct file *filp);
  82extern int cifs_revalidate_dentry_attr(struct dentry *);
  83extern int cifs_revalidate_file(struct file *filp);
  84extern int cifs_revalidate_dentry(struct dentry *);
  85extern int cifs_invalidate_mapping(struct inode *inode);
  86extern int cifs_revalidate_mapping(struct inode *inode);
  87extern int cifs_zap_mapping(struct inode *inode);
  88extern int cifs_getattr(struct user_namespace *, const struct path *,
  89                        struct kstat *, u32, unsigned int);
  90extern int cifs_setattr(struct user_namespace *, struct dentry *,
  91                        struct iattr *);
  92extern int cifs_fiemap(struct inode *, struct fiemap_extent_info *, u64 start,
  93                       u64 len);
  94
  95extern const struct inode_operations cifs_file_inode_ops;
  96extern const struct inode_operations cifs_symlink_inode_ops;
  97extern const struct inode_operations cifs_dfs_referral_inode_operations;
  98
  99
 100/* Functions related to files and directories */
 101extern const struct file_operations cifs_file_ops;
 102extern const struct file_operations cifs_file_direct_ops; /* if directio mnt */
 103extern const struct file_operations cifs_file_strict_ops; /* if strictio mnt */
 104extern const struct file_operations cifs_file_nobrl_ops; /* no brlocks */
 105extern const struct file_operations cifs_file_direct_nobrl_ops;
 106extern const struct file_operations cifs_file_strict_nobrl_ops;
 107extern int cifs_open(struct inode *inode, struct file *file);
 108extern int cifs_close(struct inode *inode, struct file *file);
 109extern int cifs_closedir(struct inode *inode, struct file *file);
 110extern ssize_t cifs_user_readv(struct kiocb *iocb, struct iov_iter *to);
 111extern ssize_t cifs_direct_readv(struct kiocb *iocb, struct iov_iter *to);
 112extern ssize_t cifs_strict_readv(struct kiocb *iocb, struct iov_iter *to);
 113extern ssize_t cifs_user_writev(struct kiocb *iocb, struct iov_iter *from);
 114extern ssize_t cifs_direct_writev(struct kiocb *iocb, struct iov_iter *from);
 115extern ssize_t cifs_strict_writev(struct kiocb *iocb, struct iov_iter *from);
 116extern int cifs_flock(struct file *pfile, int cmd, struct file_lock *plock);
 117extern int cifs_lock(struct file *, int, struct file_lock *);
 118extern int cifs_fsync(struct file *, loff_t, loff_t, int);
 119extern int cifs_strict_fsync(struct file *, loff_t, loff_t, int);
 120extern int cifs_flush(struct file *, fl_owner_t id);
 121extern int cifs_file_mmap(struct file * , struct vm_area_struct *);
 122extern int cifs_file_strict_mmap(struct file * , struct vm_area_struct *);
 123extern const struct file_operations cifs_dir_ops;
 124extern int cifs_dir_open(struct inode *inode, struct file *file);
 125extern int cifs_readdir(struct file *file, struct dir_context *ctx);
 126
 127/* Functions related to dir entries */
 128extern const struct dentry_operations cifs_dentry_ops;
 129extern const struct dentry_operations cifs_ci_dentry_ops;
 130
 131#ifdef CONFIG_CIFS_DFS_UPCALL
 132extern struct vfsmount *cifs_dfs_d_automount(struct path *path);
 133#else
 134#define cifs_dfs_d_automount NULL
 135#endif
 136
 137/* Functions related to symlinks */
 138extern const char *cifs_get_link(struct dentry *, struct inode *,
 139                        struct delayed_call *);
 140extern int cifs_symlink(struct user_namespace *mnt_userns, struct inode *inode,
 141                        struct dentry *direntry, const char *symname);
 142
 143#ifdef CONFIG_CIFS_XATTR
 144extern const struct xattr_handler *cifs_xattr_handlers[];
 145extern ssize_t  cifs_listxattr(struct dentry *, char *, size_t);
 146#else
 147# define cifs_xattr_handlers NULL
 148# define cifs_listxattr NULL
 149#endif
 150
 151extern ssize_t cifs_file_copychunk_range(unsigned int xid,
 152                                        struct file *src_file, loff_t off,
 153                                        struct file *dst_file, loff_t destoff,
 154                                        size_t len, unsigned int flags);
 155
 156extern long cifs_ioctl(struct file *filep, unsigned int cmd, unsigned long arg);
 157extern void cifs_setsize(struct inode *inode, loff_t offset);
 158extern int cifs_truncate_page(struct address_space *mapping, loff_t from);
 159
 160struct smb3_fs_context;
 161extern struct dentry *cifs_smb3_do_mount(struct file_system_type *fs_type,
 162                                         int flags, struct smb3_fs_context *ctx);
 163
 164#ifdef CONFIG_CIFS_NFSD_EXPORT
 165extern const struct export_operations cifs_export_ops;
 166#endif /* CONFIG_CIFS_NFSD_EXPORT */
 167
 168#define CIFS_VERSION   "2.32"
 169#endif                          /* _CIFSFS_H */
 170