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  */
  34 #if BITS_PER_LONG == 64
  35 static inline ino_t
  36 cifs_uniqueid_to_ino_t(u64 fileid)
  37 {
  38         return (ino_t)fileid;
  39 }
  40 #else
  41 static inline ino_t
  42 cifs_uniqueid_to_ino_t(u64 fileid)
  43 {
  44         return (ino_t)hash_64(fileid, (sizeof(ino_t) * 8) - 1) + 1;
  45 }
  46 #endif
  47
  48 extern struct file_system_type cifs_fs_type;
  49 extern const struct address_space_operations cifs_addr_ops;
  50 extern const struct address_space_operations cifs_addr_ops_smallbuf;
  51
  52 /* Functions related to super block operations */
  53 extern void cifs_sb_active(struct super_block *sb);
  54 extern void cifs_sb_deactive(struct super_block *sb);
  55
  56 /* Functions related to inodes */
  57 extern const struct inode_operations cifs_dir_inode_ops;
  58 extern struct inode *cifs_root_iget(struct super_block *);
  59 extern int cifs_create(struct inode *, struct dentry *, umode_t,
  60                        bool excl);
  61 extern int cifs_atomic_open(struct inode *, struct dentry *,
  62                             struct file *, unsigned, umode_t,
  63                             int *);
  64 extern struct dentry *cifs_lookup(struct inode *, struct dentry *,
  65                                   unsigned int);
  66 extern int cifs_unlink(struct inode *dir, struct dentry *dentry);
  67 extern int cifs_hardlink(struct dentry *, struct inode *, struct dentry *);
  68 extern int cifs_mknod(struct inode *, struct dentry *, umode_t, dev_t);
  69 extern int cifs_mkdir(struct inode *, struct dentry *, umode_t);
  70 extern int cifs_rmdir(struct inode *, struct dentry *);
  71 extern int cifs_rename2(struct inode *, struct dentry *, struct inode *,
  72                         struct dentry *, unsigned int);
  73 extern int cifs_revalidate_file_attr(struct file *filp);
  74 extern int cifs_revalidate_dentry_attr(struct dentry *);
  75 extern int cifs_revalidate_file(struct file *filp);
  76 extern int cifs_revalidate_dentry(struct dentry *);
  77 extern int cifs_invalidate_mapping(struct inode *inode);
  78 extern int cifs_revalidate_mapping(struct inode *inode);
  79 extern int cifs_zap_mapping(struct inode *inode);
  80 extern int cifs_getattr(struct vfsmount *, struct dentry *, struct kstat *);
  81 extern int cifs_setattr(struct dentry *, struct iattr *);
  82
  83 extern const struct inode_operations cifs_file_inode_ops;
  84 extern const struct inode_operations cifs_symlink_inode_ops;
  85 extern const struct inode_operations cifs_dfs_referral_inode_operations;
  86
  87
  88 /* Functions related to files and directories */
  89 extern const struct file_operations cifs_file_ops;
  90 extern const struct file_operations cifs_file_direct_ops; /* if directio mnt */
  91 extern const struct file_operations cifs_file_strict_ops; /* if strictio mnt */
  92 extern const struct file_operations cifs_file_nobrl_ops; /* no brlocks */
  93 extern const struct file_operations cifs_file_direct_nobrl_ops;
  94 extern const struct file_operations cifs_file_strict_nobrl_ops;
  95 extern int cifs_open(struct inode *inode, struct file *file);
  96 extern int cifs_close(struct inode *inode, struct file *file);
  97 extern int cifs_closedir(struct inode *inode, struct file *file);
  98 extern ssize_t cifs_user_readv(struct kiocb *iocb, struct iov_iter *to);
  99 extern ssize_t cifs_strict_readv(struct kiocb *iocb, struct iov_iter *to);
 100 extern ssize_t cifs_user_writev(struct kiocb *iocb, struct iov_iter *from);
 101 extern ssize_t cifs_strict_writev(struct kiocb *iocb, struct iov_iter *from);
 102 extern int cifs_lock(struct file *, int, struct file_lock *);
 103 extern int cifs_fsync(struct file *, loff_t, loff_t, int);
 104 extern int cifs_strict_fsync(struct file *, loff_t, loff_t, int);
 105 extern int cifs_flush(struct file *, fl_owner_t id);
 106 extern int cifs_file_mmap(struct file * , struct vm_area_struct *);
 107 extern int cifs_file_strict_mmap(struct file * , struct vm_area_struct *);
 108 extern const struct file_operations cifs_dir_ops;
 109 extern int cifs_dir_open(struct inode *inode, struct file *file);
 110 extern int cifs_readdir(struct file *file, struct dir_context *ctx);
 111
 112 /* Functions related to dir entries */
 113 extern const struct dentry_operations cifs_dentry_ops;
 114 extern const struct dentry_operations cifs_ci_dentry_ops;
 115
 116 #ifdef CONFIG_CIFS_DFS_UPCALL
 117 extern 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 */
 123 extern void *cifs_follow_link(struct dentry *direntry, struct nameidata *nd);
 124 extern int cifs_readlink(struct dentry *direntry, char __user *buffer,
 125                          int buflen);
 126 extern int cifs_symlink(struct inode *inode, struct dentry *direntry,
 127                         const char *symname);
 128 extern int      cifs_removexattr(struct dentry *, const char *);
 129 extern int      cifs_setxattr(struct dentry *, const char *, const void *,
 130                         size_t, int);
 131 extern ssize_t  cifs_getxattr(struct dentry *, const char *, void *, size_t);
 132 extern ssize_t  cifs_listxattr(struct dentry *, char *, size_t);
 133 extern long cifs_ioctl(struct file *filep, unsigned int cmd, unsigned long arg);
 134
 135 #ifdef CONFIG_CIFS_NFSD_EXPORT
 136 extern const struct export_operations cifs_export_ops;
 137 #endif /* CONFIG_CIFS_NFSD_EXPORT */
 138
 139 #define CIFS_VERSION   "2.05"
 140 #endif                          /* _CIFSFS_H */