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 * , struct vm_area_struct *);
109 extern int cifs_file_strict_mmap(struct file * , struct vm_area_struct *);
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
121 #define cifs_dfs_d_automount NULL
122 #endif
123
124 /* Functions related to symlinks */
125 extern const char *cifs_get_link(struct dentry *, struct inode *,
126 struct delayed_call *);
127 extern int cifs_symlink(struct user_namespace *mnt_userns, struct inode *inode,
128 struct dentry *direntry, const char *symname);
129
130 #ifdef CONFIG_CIFS_XATTR
131 extern const struct xattr_handler *cifs_xattr_handlers[];
132 extern 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
138 extern 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
143 extern long cifs_ioctl(struct file *filep, unsigned int cmd, unsigned long arg);
144 extern void cifs_setsize(struct inode *inode, loff_t offset);
145 extern int cifs_truncate_page(struct address_space *mapping, loff_t from);
146
147 struct smb3_fs_context;
148 extern 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
152 extern const struct export_operations cifs_export_ops;
153 #endif /* CONFIG_CIFS_NFSD_EXPORT */
154
155 /* when changing internal version - update following two lines at same time */
156 #define SMB3_PRODUCT_BUILD 40
157 #define CIFS_VERSION "2.40"
158 #endif /* _CIFSFS_H */
159