LXR linux/fs/cifs/cifsfs.h

   1/* SPDX-License-Identifier: LGPL-2.1 */
   2/*
   3 *
   4 *   Copyright (c) International Business Machines  Corp., 2002, 2007
   5 *   Author(s): Steve French (sfrench@us.ibm.com)
   6 *
   7 */
   8
   9#ifndef _CIFSFS_H
  10#define _CIFSFS_H
  11
  12#include <linux/hash.h>
  13
  14#define ROOT_I 2
  15
  16/*
  17 * ino_t is 32-bits on 32-bit arch. We have to squash the 64-bit value down
  18 * so that it will fit. We use hash_64 to convert the value to 31 bits, and
  19 * then add 1, to ensure that we don't end up with a 0 as the value.
  20 */
  21static inline ino_t
  22cifs_uniqueid_to_ino_t(u64 fileid)
  23{
  24        if ((sizeof(ino_t)) < (sizeof(u64)))
  25                return (ino_t)hash_64(fileid, (sizeof(ino_t) * 8) - 1) + 1;
  26
  27        return (ino_t)fileid;
  28
  29}
  30
  31static inline void cifs_set_time(struct dentry *dentry, unsigned long time)
  32{
  33        dentry->d_fsdata = (void *) time;
  34}
  35
  36static inline unsigned long cifs_get_time(struct dentry *dentry)
  37{
  38        return (unsigned long) dentry->d_fsdata;
  39}
  40
  41extern struct file_system_type cifs_fs_type;
  42extern const struct address_space_operations cifs_addr_ops;
  43extern const struct address_space_operations cifs_addr_ops_smallbuf;
  44
  45/* Functions related to super block operations */
  46extern void cifs_sb_active(struct super_block *sb);
  47extern void cifs_sb_deactive(struct super_block *sb);
  48
  49/* Functions related to inodes */
  50extern const struct inode_operations cifs_dir_inode_ops;
  51extern struct inode *cifs_root_iget(struct super_block *);
  52extern int cifs_create(struct user_namespace *, struct inode *,
  53                       struct dentry *, umode_t, bool excl);
  54extern int cifs_atomic_open(struct inode *, struct dentry *,
  55                            struct file *, unsigned, umode_t);
  56extern struct dentry *cifs_lookup(struct inode *, struct dentry *,
  57                                  unsigned int);
  58extern int cifs_unlink(struct inode *dir, struct dentry *dentry);
  59extern int cifs_hardlink(struct dentry *, struct inode *, struct dentry *);
  60extern int cifs_mknod(struct user_namespace *, struct inode *, struct dentry *,
  61                      umode_t, dev_t);
  62extern int cifs_mkdir(struct user_namespace *, struct inode *, struct dentry *,
  63                      umode_t);
  64extern int cifs_rmdir(struct inode *, struct dentry *);
  65extern int cifs_rename2(struct user_namespace *, struct inode *,
  66                        struct dentry *, struct inode *, struct dentry *,
  67                        unsigned int);
  68extern int cifs_revalidate_file_attr(struct file *filp);
  69extern int cifs_revalidate_dentry_attr(struct dentry *);
  70extern int cifs_revalidate_file(struct file *filp);
  71extern int cifs_revalidate_dentry(struct dentry *);
  72extern int cifs_invalidate_mapping(struct inode *inode);
  73extern int cifs_revalidate_mapping(struct inode *inode);
  74extern int cifs_zap_mapping(struct inode *inode);
  75extern int cifs_getattr(struct user_namespace *, const struct path *,
  76                        struct kstat *, u32, unsigned int);
  77extern int cifs_setattr(struct user_namespace *, struct dentry *,
  78                        struct iattr *);
  79extern int cifs_fiemap(struct inode *, struct fiemap_extent_info *, u64 start,
  80                       u64 len);
  81
  82extern const struct inode_operations cifs_file_inode_ops;
  83extern const struct inode_operations cifs_symlink_inode_ops;
  84extern const struct inode_operations cifs_dfs_referral_inode_operations;
  85
  86
  87/* Functions related to files and directories */
  88extern const struct file_operations cifs_file_ops;
  89extern const struct file_operations cifs_file_direct_ops; /* if directio mnt */
  90extern const struct file_operations cifs_file_strict_ops; /* if strictio mnt */
  91extern const struct file_operations cifs_file_nobrl_ops; /* no brlocks */
  92extern const struct file_operations cifs_file_direct_nobrl_ops;
  93extern const struct file_operations cifs_file_strict_nobrl_ops;
  94extern int cifs_open(struct inode *inode, struct file *file);
  95extern int cifs_close(struct inode *inode, struct file *file);
  96extern int cifs_closedir(struct inode *inode, struct file *file);
  97extern ssize_t cifs_user_readv(struct kiocb *iocb, struct iov_iter *to);
  98extern ssize_t cifs_direct_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_direct_writev(struct kiocb *iocb, struct iov_iter *from);
 102extern ssize_t cifs_strict_writev(struct kiocb *iocb, struct iov_iter *from);
 103extern int cifs_flock(struct file *pfile, int cmd, struct file_lock *plock);
 104extern int cifs_lock(struct file *, int, struct file_lock *);
 105extern int cifs_fsync(struct file *, loff_t, loff_t, int);
 106extern int cifs_strict_fsync(struct file *, loff_t, loff_t, int);
 107extern int cifs_flush(struct file *, fl_owner_t id);
 108extern int cifs_file_mmap(struct file * , struct vm_area_struct *);
 109extern int cifs_file_strict_mmap(struct file * , struct vm_area_struct *);
 110extern const struct file_operations cifs_dir_ops;
 111extern int cifs_dir_open(struct inode *inode, struct file *file);
 112extern int cifs_readdir(struct file *file, struct dir_context *ctx);
 113
 114/* Functions related to dir entries */
 115extern const struct dentry_operations cifs_dentry_ops;
 116extern const struct dentry_operations cifs_ci_dentry_ops;
 117
 118#ifdef CONFIG_CIFS_DFS_UPCALL
 119extern struct vfsmount *cifs_dfs_d_automount(struct path *path);
 120#else
 121#define cifs_dfs_d_automount NULL
 122#endif
 123
 124/* Functions related to symlinks */
 125extern const char *cifs_get_link(struct dentry *, struct inode *,
 126                        struct delayed_call *);
 127extern int cifs_symlink(struct user_namespace *mnt_userns, struct inode *inode,
 128                        struct dentry *direntry, const char *symname);
 129
 130#ifdef CONFIG_CIFS_XATTR
 131extern const struct xattr_handler *cifs_xattr_handlers[];
 132extern ssize_t  cifs_listxattr(struct dentry *, char *, size_t);
 133#else
 134# define cifs_xattr_handlers NULL
 135# define cifs_listxattr NULL
 136#endif
 137
 138extern ssize_t cifs_file_copychunk_range(unsigned int xid,
 139                                        struct file *src_file, loff_t off,
 140                                        struct file *dst_file, loff_t destoff,
 141                                        size_t len, unsigned int flags);
 142
 143extern long cifs_ioctl(struct file *filep, unsigned int cmd, unsigned long arg);
 144extern void cifs_setsize(struct inode *inode, loff_t offset);
 145extern int cifs_truncate_page(struct address_space *mapping, loff_t from);
 146
 147struct smb3_fs_context;
 148extern struct dentry *cifs_smb3_do_mount(struct file_system_type *fs_type,
 149                                         int flags, struct smb3_fs_context *ctx);
 150
 151#ifdef CONFIG_CIFS_NFSD_EXPORT
 152extern const struct export_operations cifs_export_ops;
 153#endif /* CONFIG_CIFS_NFSD_EXPORT */
 154
 155#define CIFS_VERSION   "2.33"
 156#endif                          /* _CIFSFS_H */
 157