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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   */
21  static inline ino_t
cifs_uniqueid_to_ino_t(u64 fileid)22  cifs_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  
cifs_set_time(struct dentry * dentry,unsigned long time)31  static inline void cifs_set_time(struct dentry *dentry, unsigned long time)
32  {
33  	dentry->d_fsdata = (void *) time;
34  }
35  
cifs_get_time(struct dentry * dentry)36  static inline unsigned long cifs_get_time(struct dentry *dentry)
37  {
38  	return (unsigned long) dentry->d_fsdata;
39  }
40  
41  extern struct file_system_type cifs_fs_type, smb3_fs_type;
42  extern const struct address_space_operations cifs_addr_ops;
43  extern const struct address_space_operations cifs_addr_ops_smallbuf;
44  
45  /* Functions related to super block operations */
46  extern void cifs_sb_active(struct super_block *sb);
47  extern void cifs_sb_deactive(struct super_block *sb);
48  
49  /* Functions related to inodes */
50  extern const struct inode_operations cifs_dir_inode_ops;
51  extern struct inode *cifs_root_iget(struct super_block *);
52  extern int cifs_create(struct user_namespace *, struct inode *,
53  		       struct dentry *, umode_t, bool excl);
54  extern int cifs_atomic_open(struct inode *, struct dentry *,
55  			    struct file *, unsigned, umode_t);
56  extern struct dentry *cifs_lookup(struct inode *, struct dentry *,
57  				  unsigned int);
58  extern int cifs_unlink(struct inode *dir, struct dentry *dentry);
59  extern int cifs_hardlink(struct dentry *, struct inode *, struct dentry *);
60  extern int cifs_mknod(struct user_namespace *, struct inode *, struct dentry *,
61  		      umode_t, dev_t);
62  extern int cifs_mkdir(struct user_namespace *, struct inode *, struct dentry *,
63  		      umode_t);
64  extern int cifs_rmdir(struct inode *, struct dentry *);
65  extern int cifs_rename2(struct user_namespace *, struct inode *,
66  			struct dentry *, struct inode *, struct dentry *,
67  			unsigned int);
68  extern int cifs_revalidate_file_attr(struct file *filp);
69  extern int cifs_revalidate_dentry_attr(struct dentry *);
70  extern int cifs_revalidate_file(struct file *filp);
71  extern int cifs_revalidate_dentry(struct dentry *);
72  extern int cifs_invalidate_mapping(struct inode *inode);
73  extern int cifs_revalidate_mapping(struct inode *inode);
74  extern int cifs_zap_mapping(struct inode *inode);
75  extern int cifs_getattr(struct user_namespace *, const struct path *,
76  			struct kstat *, u32, unsigned int);
77  extern int cifs_setattr(struct user_namespace *, struct dentry *,
78  			struct iattr *);
79  extern int cifs_fiemap(struct inode *, struct fiemap_extent_info *, u64 start,
80  		       u64 len);
81  
82  extern const struct inode_operations cifs_file_inode_ops;
83  extern const struct inode_operations cifs_symlink_inode_ops;
84  extern const struct inode_operations cifs_dfs_referral_inode_operations;
85  
86  
87  /* Functions related to files and directories */
88  extern const struct file_operations cifs_file_ops;
89  extern const struct file_operations cifs_file_direct_ops; /* if directio mnt */
90  extern const struct file_operations cifs_file_strict_ops; /* if strictio mnt */
91  extern const struct file_operations cifs_file_nobrl_ops; /* no brlocks */
92  extern const struct file_operations cifs_file_direct_nobrl_ops;
93  extern const struct file_operations cifs_file_strict_nobrl_ops;
94  extern int cifs_open(struct inode *inode, struct file *file);
95  extern int cifs_close(struct inode *inode, struct file *file);
96  extern int cifs_closedir(struct inode *inode, struct file *file);
97  extern ssize_t cifs_user_readv(struct kiocb *iocb, struct iov_iter *to);
98  extern ssize_t cifs_direct_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_direct_writev(struct kiocb *iocb, struct iov_iter *from);
102  extern ssize_t cifs_strict_writev(struct kiocb *iocb, struct iov_iter *from);
103  extern int cifs_flock(struct file *pfile, int cmd, struct file_lock *plock);
104  extern int cifs_lock(struct file *, int, struct file_lock *);
105  extern int cifs_fsync(struct file *, loff_t, loff_t, int);
106  extern int cifs_strict_fsync(struct file *, loff_t, loff_t, int);
107  extern int cifs_flush(struct file *, fl_owner_t id);
108  extern int cifs_file_mmap(struct file *file, struct vm_area_struct *vma);
109  extern int cifs_file_strict_mmap(struct file *file, struct vm_area_struct *vma);
110  extern const struct file_operations cifs_dir_ops;
111  extern int cifs_dir_open(struct inode *inode, struct file *file);
112  extern int cifs_readdir(struct file *file, struct dir_context *ctx);
113  
114  /* Functions related to dir entries */
115  extern const struct dentry_operations cifs_dentry_ops;
116  extern const struct dentry_operations cifs_ci_dentry_ops;
117  
118  #ifdef CONFIG_CIFS_DFS_UPCALL
119  extern struct vfsmount *cifs_dfs_d_automount(struct path *path);
120  #else
cifs_dfs_d_automount(struct path * path)121  static inline struct vfsmount *cifs_dfs_d_automount(struct path *path)
122  {
123  	return ERR_PTR(-EREMOTE);
124  }
125  #endif
126  
127  /* Functions related to symlinks */
128  extern const char *cifs_get_link(struct dentry *, struct inode *,
129  			struct delayed_call *);
130  extern int cifs_symlink(struct user_namespace *mnt_userns, struct inode *inode,
131  			struct dentry *direntry, const char *symname);
132  
133  #ifdef CONFIG_CIFS_XATTR
134  extern const struct xattr_handler *cifs_xattr_handlers[];
135  extern ssize_t	cifs_listxattr(struct dentry *, char *, size_t);
136  #else
137  # define cifs_xattr_handlers NULL
138  # define cifs_listxattr NULL
139  #endif
140  
141  extern ssize_t cifs_file_copychunk_range(unsigned int xid,
142  					struct file *src_file, loff_t off,
143  					struct file *dst_file, loff_t destoff,
144  					size_t len, unsigned int flags);
145  
146  extern long cifs_ioctl(struct file *filep, unsigned int cmd, unsigned long arg);
147  extern void cifs_setsize(struct inode *inode, loff_t offset);
148  extern int cifs_truncate_page(struct address_space *mapping, loff_t from);
149  
150  struct smb3_fs_context;
151  extern struct dentry *cifs_smb3_do_mount(struct file_system_type *fs_type,
152  					 int flags, struct smb3_fs_context *ctx);
153  
154  #ifdef CONFIG_CIFS_NFSD_EXPORT
155  extern const struct export_operations cifs_export_ops;
156  #endif /* CONFIG_CIFS_NFSD_EXPORT */
157  
158  /* when changing internal version - update following two lines at same time */
159  #define SMB3_PRODUCT_BUILD 40
160  #define CIFS_VERSION   "2.40"
161  #endif				/* _CIFSFS_H */
162