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 extern atomic_t cifs_sillycounter;
17 extern atomic_t cifs_tmpcounter;
18
19 /*
20 * ino_t is 32-bits on 32-bit arch. We have to squash the 64-bit value down
21 * so that it will fit. We use hash_64 to convert the value to 31 bits, and
22 * then add 1, to ensure that we don't end up with a 0 as the value.
23 */
24 static inline ino_t
cifs_uniqueid_to_ino_t(u64 fileid)25 cifs_uniqueid_to_ino_t(u64 fileid)
26 {
27 if ((sizeof(ino_t)) < (sizeof(u64)))
28 return (ino_t)hash_64(fileid, (sizeof(ino_t) * 8) - 1) + 1;
29
30 return (ino_t)fileid;
31
32 }
33
cifs_set_time(struct dentry * dentry,unsigned long time)34 static inline void cifs_set_time(struct dentry *dentry, unsigned long time)
35 {
36 dentry->d_fsdata = (void *) time;
37 }
38
cifs_get_time(struct dentry * dentry)39 static inline unsigned long cifs_get_time(struct dentry *dentry)
40 {
41 return (unsigned long) dentry->d_fsdata;
42 }
43
44 extern struct file_system_type cifs_fs_type, smb3_fs_type;
45 extern const struct address_space_operations cifs_addr_ops;
46 extern const struct address_space_operations cifs_addr_ops_smallbuf;
47
48 /* Functions related to super block operations */
49 void cifs_sb_active(struct super_block *sb);
50 void cifs_sb_deactive(struct super_block *sb);
51
52 /* Functions related to inodes */
53 extern const struct inode_operations cifs_dir_inode_ops;
54 struct inode *cifs_root_iget(struct super_block *sb);
55 int cifs_create(struct mnt_idmap *idmap, struct inode *dir,
56 struct dentry *direntry, umode_t mode, bool excl);
57 int cifs_atomic_open(struct inode *dir, struct dentry *direntry,
58 struct file *file, unsigned int oflags, umode_t mode);
59 int cifs_tmpfile(struct mnt_idmap *idmap, struct inode *dir,
60 struct file *file, umode_t mode);
61 struct dentry *cifs_lookup(struct inode *parent_dir_inode,
62 struct dentry *direntry, unsigned int flags);
63 int cifs_unlink(struct inode *dir, struct dentry *dentry);
64 int cifs_hardlink(struct dentry *old_file, struct inode *inode,
65 struct dentry *direntry);
66 int cifs_mknod(struct mnt_idmap *idmap, struct inode *inode,
67 struct dentry *direntry, umode_t mode, dev_t device_number);
68 struct dentry *cifs_mkdir(struct mnt_idmap *idmap, struct inode *inode,
69 struct dentry *direntry, umode_t mode);
70 int cifs_rmdir(struct inode *inode, struct dentry *direntry);
71 int cifs_rename2(struct mnt_idmap *idmap, struct inode *source_dir,
72 struct dentry *source_dentry, struct inode *target_dir,
73 struct dentry *target_dentry, unsigned int flags);
74 int cifs_revalidate_file_attr(struct file *filp);
75 int cifs_revalidate_dentry_attr(struct dentry *dentry);
76 int cifs_revalidate_file(struct file *filp);
77 int cifs_revalidate_dentry(struct dentry *dentry);
78 int cifs_revalidate_mapping(struct inode *inode);
79 int cifs_zap_mapping(struct inode *inode);
80 int cifs_getattr(struct mnt_idmap *idmap, const struct path *path,
81 struct kstat *stat, u32 request_mask, unsigned int flags);
82 int cifs_setattr(struct mnt_idmap *idmap, struct dentry *direntry,
83 struct iattr *attrs);
84 int cifs_fiemap(struct inode *inode, struct fiemap_extent_info *fei, u64 start,
85 u64 len);
86
87 extern const struct inode_operations cifs_file_inode_ops;
88 extern const struct inode_operations cifs_symlink_inode_ops;
89 extern const struct inode_operations cifs_namespace_inode_operations;
90
91
92 /* Functions related to files and directories */
93 extern const struct netfs_request_ops cifs_req_ops;
94 extern const struct file_operations cifs_file_ops;
95 extern const struct file_operations cifs_file_direct_ops; /* if directio mnt */
96 extern const struct file_operations cifs_file_strict_ops; /* if strictio mnt */
97 extern const struct file_operations cifs_file_nobrl_ops; /* no brlocks */
98 extern const struct file_operations cifs_file_direct_nobrl_ops;
99 extern const struct file_operations cifs_file_strict_nobrl_ops;
100 int cifs_open(struct inode *inode, struct file *file);
101 int cifs_close(struct inode *inode, struct file *file);
102 int cifs_closedir(struct inode *inode, struct file *file);
103 ssize_t cifs_strict_readv(struct kiocb *iocb, struct iov_iter *to);
104 ssize_t cifs_strict_writev(struct kiocb *iocb, struct iov_iter *from);
105 ssize_t cifs_file_write_iter(struct kiocb *iocb, struct iov_iter *from);
106 ssize_t cifs_loose_read_iter(struct kiocb *iocb, struct iov_iter *iter);
107 int cifs_flock(struct file *file, int cmd, struct file_lock *fl);
108 int cifs_lock(struct file *file, int cmd, struct file_lock *flock);
109 int cifs_fsync(struct file *file, loff_t start, loff_t end, int datasync);
110 int cifs_strict_fsync(struct file *file, loff_t start, loff_t end,
111 int datasync);
112 int cifs_flush(struct file *file, fl_owner_t id);
113 int cifs_file_mmap_prepare(struct vm_area_desc *desc);
114 int cifs_file_strict_mmap_prepare(struct vm_area_desc *desc);
115 extern const struct file_operations cifs_dir_ops;
116 int cifs_readdir(struct file *file, struct dir_context *ctx);
117
118 /* Functions related to dir entries */
119 extern const struct dentry_operations cifs_dentry_ops;
120 extern const struct dentry_operations cifs_ci_dentry_ops;
121
122 struct vfsmount *cifs_d_automount(struct path *path);
123
124 /* Functions related to symlinks */
125 const char *cifs_get_link(struct dentry *dentry, struct inode *inode,
126 struct delayed_call *done);
127 int cifs_symlink(struct mnt_idmap *idmap, struct inode *inode,
128 struct dentry *direntry, const char *symname);
129
130 #ifdef CONFIG_CIFS_XATTR
131 extern const struct xattr_handler * const cifs_xattr_handlers[];
132 ssize_t cifs_listxattr(struct dentry *direntry, char *data, size_t buf_size);
133 #else
134 # define cifs_xattr_handlers NULL
135 # define cifs_listxattr NULL
136 #endif
137
138 ssize_t cifs_file_copychunk_range(unsigned int xid, struct file *src_file,
139 loff_t off, struct file *dst_file,
140 loff_t destoff, size_t len,
141 unsigned int flags);
142
143 long cifs_ioctl(struct file *filep, unsigned int command, unsigned long arg);
144 void cifs_setsize(struct inode *inode, loff_t offset);
145
146 struct smb3_fs_context;
147 struct dentry *cifs_smb3_do_mount(struct file_system_type *fs_type, int flags,
148 struct smb3_fs_context *old_ctx);
149
150 char *cifs_silly_fullpath(struct dentry *dentry);
151
152 #define CIFS_TMPNAME_PREFIX ".__smbfile_tmp"
153 #define CIFS_TMPNAME_PREFIX_LEN ((int)sizeof(CIFS_TMPNAME_PREFIX) - 1)
154 #define CIFS_TMPNAME_COUNTER_LEN ((int)sizeof(cifs_tmpcounter) * 2)
155 #define CIFS_TMPNAME_LEN \
156 (CIFS_TMPNAME_PREFIX_LEN + CIFS_TMPNAME_COUNTER_LEN)
157
158 #define CIFS_SILLYNAME_PREFIX ".__smbfile_silly"
159 #define CIFS_SILLYNAME_PREFIX_LEN ((int)sizeof(CIFS_SILLYNAME_PREFIX) - 1)
160 #define CIFS_SILLYNAME_COUNTER_LEN ((int)sizeof(cifs_sillycounter) * 2)
161 #define CIFS_SILLYNAME_LEN \
162 (CIFS_SILLYNAME_PREFIX_LEN + CIFS_SILLYNAME_COUNTER_LEN)
163
164 #ifdef CONFIG_CIFS_NFSD_EXPORT
165 extern const struct export_operations cifs_export_ops;
166 #endif /* CONFIG_CIFS_NFSD_EXPORT */
167
168 /* when changing internal version - update following two lines at same time */
169 #define SMB3_PRODUCT_BUILD 59
170 #define CIFS_VERSION "2.59"
171 #endif /* _CIFSFS_H */
172