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 mnt_idmap *, 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 mnt_idmap *, struct inode *, struct dentry *,
61 		      umode_t, dev_t);
62 extern int cifs_mkdir(struct mnt_idmap *, struct inode *, struct dentry *,
63 		      umode_t);
64 extern int cifs_rmdir(struct inode *, struct dentry *);
65 extern int cifs_rename2(struct mnt_idmap *, 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_revalidate_mapping(struct inode *inode);
73 extern int cifs_zap_mapping(struct inode *inode);
74 extern int cifs_getattr(struct mnt_idmap *, const struct path *,
75 			struct kstat *, u32, unsigned int);
76 extern int cifs_setattr(struct mnt_idmap *, struct dentry *,
77 			struct iattr *);
78 extern int cifs_fiemap(struct inode *, struct fiemap_extent_info *, u64 start,
79 		       u64 len);
80 
81 extern const struct inode_operations cifs_file_inode_ops;
82 extern const struct inode_operations cifs_symlink_inode_ops;
83 extern const struct inode_operations cifs_namespace_inode_operations;
84 
85 
86 /* Functions related to files and directories */
87 extern const struct netfs_request_ops cifs_req_ops;
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_strict_readv(struct kiocb *iocb, struct iov_iter *to);
98 extern ssize_t cifs_strict_writev(struct kiocb *iocb, struct iov_iter *from);
99 ssize_t cifs_file_write_iter(struct kiocb *iocb, struct iov_iter *from);
100 ssize_t cifs_loose_read_iter(struct kiocb *iocb, struct iov_iter *iter);
101 extern int cifs_flock(struct file *pfile, int cmd, struct file_lock *plock);
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 *file, struct vm_area_struct *vma);
107 extern int cifs_file_strict_mmap(struct file *file, struct vm_area_struct *vma);
108 extern const struct file_operations cifs_dir_ops;
109 extern int cifs_readdir(struct file *file, struct dir_context *ctx);
110 
111 /* Functions related to dir entries */
112 extern const struct dentry_operations cifs_dentry_ops;
113 extern const struct dentry_operations cifs_ci_dentry_ops;
114 
115 extern struct vfsmount *cifs_d_automount(struct path *path);
116 
117 /* Functions related to symlinks */
118 extern const char *cifs_get_link(struct dentry *, struct inode *,
119 			struct delayed_call *);
120 extern int cifs_symlink(struct mnt_idmap *idmap, struct inode *inode,
121 			struct dentry *direntry, const char *symname);
122 
123 #ifdef CONFIG_CIFS_XATTR
124 extern const struct xattr_handler * const cifs_xattr_handlers[];
125 extern ssize_t	cifs_listxattr(struct dentry *, char *, size_t);
126 #else
127 # define cifs_xattr_handlers NULL
128 # define cifs_listxattr NULL
129 #endif
130 
131 extern ssize_t cifs_file_copychunk_range(unsigned int xid,
132 					struct file *src_file, loff_t off,
133 					struct file *dst_file, loff_t destoff,
134 					size_t len, unsigned int flags);
135 
136 extern long cifs_ioctl(struct file *filep, unsigned int cmd, unsigned long arg);
137 extern void cifs_setsize(struct inode *inode, loff_t offset);
138 extern int cifs_truncate_page(struct address_space *mapping, loff_t from);
139 
140 struct smb3_fs_context;
141 extern struct dentry *cifs_smb3_do_mount(struct file_system_type *fs_type,
142 					 int flags, struct smb3_fs_context *ctx);
143 
144 #ifdef CONFIG_CIFS_NFSD_EXPORT
145 extern const struct export_operations cifs_export_ops;
146 #endif /* CONFIG_CIFS_NFSD_EXPORT */
147 
148 /* when changing internal version - update following two lines at same time */
149 #define SMB3_PRODUCT_BUILD 51
150 #define CIFS_VERSION   "2.51"
151 #endif				/* _CIFSFS_H */
152