1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3 * ncplib_kernel.h
4 *
5 * Copyright (C) 1995, 1996 by Volker Lendecke
6 * Modified for big endian by J.F. Chadima and David S. Miller
7 * Modified 1997 Peter Waltenberg, Bill Hawes, David Woodhouse for 2.1 dcache
8 * Modified 1998, 1999 Wolfram Pienkoss for NLS
9 * Modified 1999 Wolfram Pienkoss for directory caching
10 *
11 */
12
13 #ifndef _NCPLIB_H
14 #define _NCPLIB_H
15
16
17 #include <linux/fs.h>
18 #include <linux/types.h>
19 #include <linux/errno.h>
20 #include <linux/slab.h>
21 #include <linux/stat.h>
22 #include <linux/fcntl.h>
23 #include <linux/pagemap.h>
24
25 #include <linux/uaccess.h>
26 #include <asm/byteorder.h>
27 #include <asm/unaligned.h>
28 #include <asm/string.h>
29
30 #ifdef CONFIG_NCPFS_NLS
31 #include <linux/nls.h>
32 #else
33 #include <linux/ctype.h>
34 #endif /* CONFIG_NCPFS_NLS */
35
36 #define NCP_MIN_SYMLINK_SIZE 8
37 #define NCP_MAX_SYMLINK_SIZE 512
38
39 #define NCP_BLOCK_SHIFT 9
40 #define NCP_BLOCK_SIZE (1 << (NCP_BLOCK_SHIFT))
41
42 int ncp_negotiate_buffersize(struct ncp_server *, int, int *);
43 int ncp_negotiate_size_and_options(struct ncp_server *server, int size,
44 int options, int *ret_size, int *ret_options);
45
46 int ncp_get_volume_info_with_number(struct ncp_server* server, int n,
47 struct ncp_volume_info *target);
48
49 int ncp_get_directory_info(struct ncp_server* server, __u8 dirhandle,
50 struct ncp_volume_info* target);
51
52 int ncp_close_file(struct ncp_server *, const char *);
ncp_read_bounce_size(__u32 size)53 static inline int ncp_read_bounce_size(__u32 size) {
54 return sizeof(struct ncp_reply_header) + 2 + 2 + size + 8;
55 };
56 int ncp_read_bounce(struct ncp_server *, const char *, __u32, __u16,
57 struct iov_iter *, int *, void *bounce, __u32 bouncelen);
58 int ncp_read_kernel(struct ncp_server *, const char *, __u32, __u16,
59 char *, int *);
60 int ncp_write_kernel(struct ncp_server *, const char *, __u32, __u16,
61 const char *, int *);
62
ncp_inode_close(struct inode * inode)63 static inline void ncp_inode_close(struct inode *inode) {
64 atomic_dec(&NCP_FINFO(inode)->opened);
65 }
66
67 void ncp_extract_file_info(const void* src, struct nw_info_struct* target);
68 int ncp_obtain_info(struct ncp_server *server, struct inode *, const char *,
69 struct nw_info_struct *target);
70 int ncp_obtain_nfs_info(struct ncp_server *server, struct nw_info_struct *target);
71 int ncp_update_known_namespace(struct ncp_server *server, __u8 volume, int *ret_ns);
72 int ncp_get_volume_root(struct ncp_server *server, const char *volname,
73 __u32 *volume, __le32 *dirent, __le32 *dosdirent);
74 int ncp_lookup_volume(struct ncp_server *, const char *, struct nw_info_struct *);
75 int ncp_modify_file_or_subdir_dos_info(struct ncp_server *, struct inode *,
76 __le32, const struct nw_modify_dos_info *info);
77 int ncp_modify_file_or_subdir_dos_info_path(struct ncp_server *, struct inode *,
78 const char* path, __le32, const struct nw_modify_dos_info *info);
79 int ncp_modify_nfs_info(struct ncp_server *, __u8 volnum, __le32 dirent,
80 __u32 mode, __u32 rdev);
81
82 int ncp_del_file_or_subdir2(struct ncp_server *, struct dentry*);
83 int ncp_del_file_or_subdir(struct ncp_server *, struct inode *, const char *);
84 int ncp_open_create_file_or_subdir(struct ncp_server *, struct inode *, const char *,
85 int, __le32, __le16, struct ncp_entry_info *);
86
87 int ncp_initialize_search(struct ncp_server *, struct inode *,
88 struct nw_search_sequence *target);
89 int ncp_search_for_fileset(struct ncp_server *server,
90 struct nw_search_sequence *seq,
91 int* more, int* cnt,
92 char* buffer, size_t bufsize,
93 char** rbuf, size_t* rsize);
94
95 int ncp_ren_or_mov_file_or_subdir(struct ncp_server *server,
96 struct inode *, const char *, struct inode *, const char *);
97
98
99 int
100 ncp_LogPhysicalRecord(struct ncp_server *server,
101 const char *file_id, __u8 locktype,
102 __u32 offset, __u32 length, __u16 timeout);
103
104 #ifdef CONFIG_NCPFS_IOCTL_LOCKING
105 int
106 ncp_ClearPhysicalRecord(struct ncp_server *server,
107 const char *file_id,
108 __u32 offset, __u32 length);
109 #endif /* CONFIG_NCPFS_IOCTL_LOCKING */
110
111 int
112 ncp_mount_subdir(struct ncp_server *, __u8, __u8, __le32,
113 __u32* volume, __le32* dirent, __le32* dosdirent);
114 int ncp_dirhandle_alloc(struct ncp_server *, __u8 vol, __le32 dirent, __u8 *dirhandle);
115 int ncp_dirhandle_free(struct ncp_server *, __u8 dirhandle);
116
117 int ncp_create_new(struct inode *dir, struct dentry *dentry,
118 umode_t mode, dev_t rdev, __le32 attributes);
119
ncp_is_nfs_extras(struct ncp_server * server,unsigned int volnum)120 static inline int ncp_is_nfs_extras(struct ncp_server* server, unsigned int volnum) {
121 #ifdef CONFIG_NCPFS_NFS_NS
122 return (server->m.flags & NCP_MOUNT_NFS_EXTRAS) &&
123 (server->name_space[volnum] == NW_NS_NFS);
124 #else
125 return 0;
126 #endif
127 }
128
129 #ifdef CONFIG_NCPFS_NLS
130
131 int ncp__io2vol(struct ncp_server *, unsigned char *, unsigned int *,
132 const unsigned char *, unsigned int, int);
133 int ncp__vol2io(struct ncp_server *, unsigned char *, unsigned int *,
134 const unsigned char *, unsigned int, int);
135
136 #define NCP_ESC ':'
137 #define NCP_IO_TABLE(sb) (NCP_SBP(sb)->nls_io)
138 #define ncp_tolower(t, c) nls_tolower(t, c)
139 #define ncp_toupper(t, c) nls_toupper(t, c)
140 #define ncp_strnicmp(t, s1, s2, len) \
141 nls_strnicmp(t, s1, s2, len)
142 #define ncp_io2vol(S,m,i,n,k,U) ncp__io2vol(S,m,i,n,k,U)
143 #define ncp_vol2io(S,m,i,n,k,U) ncp__vol2io(S,m,i,n,k,U)
144
145 #else
146
147 int ncp__io2vol(unsigned char *, unsigned int *,
148 const unsigned char *, unsigned int, int);
149 int ncp__vol2io(unsigned char *, unsigned int *,
150 const unsigned char *, unsigned int, int);
151
152 #define NCP_IO_TABLE(sb) NULL
153 #define ncp_tolower(t, c) tolower(c)
154 #define ncp_toupper(t, c) toupper(c)
155 #define ncp_io2vol(S,m,i,n,k,U) ncp__io2vol(m,i,n,k,U)
156 #define ncp_vol2io(S,m,i,n,k,U) ncp__vol2io(m,i,n,k,U)
157
158
ncp_strnicmp(const struct nls_table * t,const unsigned char * s1,const unsigned char * s2,int len)159 static inline int ncp_strnicmp(const struct nls_table *t,
160 const unsigned char *s1, const unsigned char *s2, int len)
161 {
162 while (len--) {
163 if (tolower(*s1++) != tolower(*s2++))
164 return 1;
165 }
166
167 return 0;
168 }
169
170 #endif /* CONFIG_NCPFS_NLS */
171
172 #define NCP_GET_AGE(dentry) (jiffies - (dentry)->d_time)
173 #define NCP_MAX_AGE(server) atomic_read(&(server)->dentry_ttl)
174 #define NCP_TEST_AGE(server,dentry) (NCP_GET_AGE(dentry) < NCP_MAX_AGE(server))
175
176 static inline void
ncp_age_dentry(struct ncp_server * server,struct dentry * dentry)177 ncp_age_dentry(struct ncp_server* server, struct dentry* dentry)
178 {
179 dentry->d_time = jiffies - NCP_MAX_AGE(server);
180 }
181
182 static inline void
ncp_new_dentry(struct dentry * dentry)183 ncp_new_dentry(struct dentry* dentry)
184 {
185 dentry->d_time = jiffies;
186 }
187
188 struct ncp_cache_head {
189 time_t mtime;
190 unsigned long time; /* cache age */
191 unsigned long end; /* last valid fpos in cache */
192 int eof;
193 };
194
195 #define NCP_DIRCACHE_SIZE ((int)(PAGE_SIZE/sizeof(struct dentry *)))
196 union ncp_dir_cache {
197 struct ncp_cache_head head;
198 struct dentry *dentry[NCP_DIRCACHE_SIZE];
199 };
200
201 #define NCP_FIRSTCACHE_SIZE ((int)((NCP_DIRCACHE_SIZE * \
202 sizeof(struct dentry *) - sizeof(struct ncp_cache_head)) / \
203 sizeof(struct dentry *)))
204
205 #define NCP_DIRCACHE_START (NCP_DIRCACHE_SIZE - NCP_FIRSTCACHE_SIZE)
206
207 struct ncp_cache_control {
208 struct ncp_cache_head head;
209 struct page *page;
210 union ncp_dir_cache *cache;
211 unsigned long fpos, ofs;
212 int filled, valid, idx;
213 };
214
215 #endif /* _NCPLIB_H */
216