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1da177e4 LT |
1 | /* |
2 | * ncplib_kernel.h | |
3 | * | |
4 | * Copyright (C) 1995, 1996 by Volker Lendecke | |
5 | * Modified for big endian by J.F. Chadima and David S. Miller | |
6 | * Modified 1997 Peter Waltenberg, Bill Hawes, David Woodhouse for 2.1 dcache | |
7 | * Modified 1998, 1999 Wolfram Pienkoss for NLS | |
8 | * Modified 1999 Wolfram Pienkoss for directory caching | |
9 | * | |
10 | */ | |
11 | ||
12 | #ifndef _NCPLIB_H | |
13 | #define _NCPLIB_H | |
14 | ||
15 | #include <linux/config.h> | |
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 <asm/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 | #include <linux/ncp_fs.h> | |
37 | ||
38 | #define NCP_MIN_SYMLINK_SIZE 8 | |
39 | #define NCP_MAX_SYMLINK_SIZE 512 | |
40 | ||
41 | #define NCP_BLOCK_SHIFT 9 | |
42 | #define NCP_BLOCK_SIZE (1 << (NCP_BLOCK_SHIFT)) | |
43 | ||
44 | int ncp_negotiate_buffersize(struct ncp_server *, int, int *); | |
45 | int ncp_negotiate_size_and_options(struct ncp_server *server, int size, | |
46 | int options, int *ret_size, int *ret_options); | |
47 | ||
48 | int ncp_get_volume_info_with_number(struct ncp_server* server, int n, | |
49 | struct ncp_volume_info *target); | |
50 | ||
51 | int ncp_get_directory_info(struct ncp_server* server, __u8 dirhandle, | |
52 | struct ncp_volume_info* target); | |
53 | ||
54 | int ncp_close_file(struct ncp_server *, const char *); | |
55 | static inline int ncp_read_bounce_size(__u32 size) { | |
56 | return sizeof(struct ncp_reply_header) + 2 + 2 + size + 8; | |
57 | }; | |
58 | int ncp_read_bounce(struct ncp_server *, const char *, __u32, __u16, | |
59 | char __user *, int *, void* bounce, __u32 bouncelen); | |
60 | int ncp_read_kernel(struct ncp_server *, const char *, __u32, __u16, | |
61 | char *, int *); | |
62 | int ncp_write_kernel(struct ncp_server *, const char *, __u32, __u16, | |
63 | const char *, int *); | |
64 | ||
65 | static inline void ncp_inode_close(struct inode *inode) { | |
66 | atomic_dec(&NCP_FINFO(inode)->opened); | |
67 | } | |
68 | ||
69 | void ncp_extract_file_info(void* src, struct nw_info_struct* target); | |
70 | int ncp_obtain_info(struct ncp_server *server, struct inode *, char *, | |
71 | struct nw_info_struct *target); | |
72 | int ncp_obtain_nfs_info(struct ncp_server *server, struct nw_info_struct *target); | |
73 | int ncp_get_volume_root(struct ncp_server *server, const char *volname, | |
74 | __u32 *volume, __le32 *dirent, __le32 *dosdirent); | |
75 | int ncp_lookup_volume(struct ncp_server *, const char *, struct nw_info_struct *); | |
76 | int ncp_modify_file_or_subdir_dos_info(struct ncp_server *, struct inode *, | |
77 | __le32, const struct nw_modify_dos_info *info); | |
78 | int ncp_modify_file_or_subdir_dos_info_path(struct ncp_server *, struct inode *, | |
79 | const char* path, __le32, const struct nw_modify_dos_info *info); | |
80 | int ncp_modify_nfs_info(struct ncp_server *, __u8 volnum, __le32 dirent, | |
81 | __u32 mode, __u32 rdev); | |
82 | ||
83 | int ncp_del_file_or_subdir2(struct ncp_server *, struct dentry*); | |
84 | int ncp_del_file_or_subdir(struct ncp_server *, struct inode *, char *); | |
85 | int ncp_open_create_file_or_subdir(struct ncp_server *, struct inode *, char *, | |
86 | int, __le32, __le16, struct ncp_entry_info *); | |
87 | ||
88 | int ncp_initialize_search(struct ncp_server *, struct inode *, | |
89 | struct nw_search_sequence *target); | |
1da177e4 LT |
90 | int ncp_search_for_fileset(struct ncp_server *server, |
91 | struct nw_search_sequence *seq, | |
92 | int* more, int* cnt, | |
93 | char* buffer, size_t bufsize, | |
94 | char** rbuf, size_t* rsize); | |
95 | ||
96 | int ncp_ren_or_mov_file_or_subdir(struct ncp_server *server, | |
97 | struct inode *, char *, struct inode *, char *); | |
98 | ||
99 | ||
100 | int | |
101 | ncp_LogPhysicalRecord(struct ncp_server *server, | |
102 | const char *file_id, __u8 locktype, | |
103 | __u32 offset, __u32 length, __u16 timeout); | |
104 | ||
105 | #ifdef CONFIG_NCPFS_IOCTL_LOCKING | |
106 | int | |
107 | ncp_ClearPhysicalRecord(struct ncp_server *server, | |
108 | const char *file_id, | |
109 | __u32 offset, __u32 length); | |
110 | #endif /* CONFIG_NCPFS_IOCTL_LOCKING */ | |
111 | ||
112 | int | |
113 | ncp_mount_subdir(struct ncp_server *, __u8, __u8, __le32, | |
114 | __u32* volume, __le32* dirent, __le32* dosdirent); | |
115 | int ncp_dirhandle_alloc(struct ncp_server *, __u8 vol, __le32 dirent, __u8 *dirhandle); | |
116 | int ncp_dirhandle_free(struct ncp_server *, __u8 dirhandle); | |
117 | ||
118 | int ncp_create_new(struct inode *dir, struct dentry *dentry, | |
119 | int mode, dev_t rdev, __le32 attributes); | |
120 | ||
121 | static inline int ncp_is_nfs_extras(struct ncp_server* server, unsigned int volnum) { | |
122 | #ifdef CONFIG_NCPFS_NFS_NS | |
123 | return (server->m.flags & NCP_MOUNT_NFS_EXTRAS) && | |
124 | (server->name_space[volnum] == NW_NS_NFS); | |
125 | #else | |
126 | return 0; | |
127 | #endif | |
128 | } | |
129 | ||
130 | #ifdef CONFIG_NCPFS_NLS | |
131 | ||
132 | int ncp__io2vol(struct ncp_server *, unsigned char *, unsigned int *, | |
133 | const unsigned char *, unsigned int, int); | |
134 | int ncp__vol2io(struct ncp_server *, unsigned char *, unsigned int *, | |
135 | const unsigned char *, unsigned int, int); | |
136 | ||
137 | #define NCP_ESC ':' | |
138 | #define NCP_IO_TABLE(dentry) (NCP_SERVER((dentry)->d_inode)->nls_io) | |
139 | #define ncp_tolower(t, c) nls_tolower(t, c) | |
140 | #define ncp_toupper(t, c) nls_toupper(t, c) | |
141 | #define ncp_strnicmp(t, s1, s2, len) \ | |
142 | nls_strnicmp(t, s1, s2, len) | |
143 | #define ncp_io2vol(S,m,i,n,k,U) ncp__io2vol(S,m,i,n,k,U) | |
144 | #define ncp_vol2io(S,m,i,n,k,U) ncp__vol2io(S,m,i,n,k,U) | |
145 | ||
146 | #else | |
147 | ||
148 | int ncp__io2vol(unsigned char *, unsigned int *, | |
149 | const unsigned char *, unsigned int, int); | |
150 | int ncp__vol2io(unsigned char *, unsigned int *, | |
151 | const unsigned char *, unsigned int, int); | |
152 | ||
153 | #define NCP_IO_TABLE(dentry) NULL | |
154 | #define ncp_tolower(t, c) tolower(c) | |
155 | #define ncp_toupper(t, c) toupper(c) | |
156 | #define ncp_io2vol(S,m,i,n,k,U) ncp__io2vol(m,i,n,k,U) | |
157 | #define ncp_vol2io(S,m,i,n,k,U) ncp__vol2io(m,i,n,k,U) | |
158 | ||
159 | ||
160 | static inline int ncp_strnicmp(struct nls_table *t, const unsigned char *s1, | |
161 | const unsigned char *s2, int len) | |
162 | { | |
163 | while (len--) { | |
164 | if (tolower(*s1++) != tolower(*s2++)) | |
165 | return 1; | |
166 | } | |
167 | ||
168 | return 0; | |
169 | } | |
170 | ||
171 | #endif /* CONFIG_NCPFS_NLS */ | |
172 | ||
173 | #define NCP_GET_AGE(dentry) (jiffies - (dentry)->d_time) | |
174 | #define NCP_MAX_AGE(server) ((server)->dentry_ttl) | |
175 | #define NCP_TEST_AGE(server,dentry) (NCP_GET_AGE(dentry) < NCP_MAX_AGE(server)) | |
176 | ||
177 | static inline void | |
178 | ncp_age_dentry(struct ncp_server* server, struct dentry* dentry) | |
179 | { | |
180 | dentry->d_time = jiffies - server->dentry_ttl; | |
181 | } | |
182 | ||
183 | static inline void | |
184 | ncp_new_dentry(struct dentry* dentry) | |
185 | { | |
186 | dentry->d_time = jiffies; | |
187 | } | |
188 | ||
189 | static inline void | |
190 | ncp_renew_dentries(struct dentry *parent) | |
191 | { | |
192 | struct ncp_server *server = NCP_SERVER(parent->d_inode); | |
193 | struct list_head *next; | |
194 | struct dentry *dentry; | |
195 | ||
196 | spin_lock(&dcache_lock); | |
197 | next = parent->d_subdirs.next; | |
198 | while (next != &parent->d_subdirs) { | |
5160ee6f | 199 | dentry = list_entry(next, struct dentry, d_u.d_child); |
1da177e4 LT |
200 | |
201 | if (dentry->d_fsdata == NULL) | |
202 | ncp_age_dentry(server, dentry); | |
203 | else | |
204 | ncp_new_dentry(dentry); | |
205 | ||
206 | next = next->next; | |
207 | } | |
208 | spin_unlock(&dcache_lock); | |
209 | } | |
210 | ||
211 | static inline void | |
212 | ncp_invalidate_dircache_entries(struct dentry *parent) | |
213 | { | |
214 | struct ncp_server *server = NCP_SERVER(parent->d_inode); | |
215 | struct list_head *next; | |
216 | struct dentry *dentry; | |
217 | ||
218 | spin_lock(&dcache_lock); | |
219 | next = parent->d_subdirs.next; | |
220 | while (next != &parent->d_subdirs) { | |
5160ee6f | 221 | dentry = list_entry(next, struct dentry, d_u.d_child); |
1da177e4 LT |
222 | dentry->d_fsdata = NULL; |
223 | ncp_age_dentry(server, dentry); | |
224 | next = next->next; | |
225 | } | |
226 | spin_unlock(&dcache_lock); | |
227 | } | |
228 | ||
229 | struct ncp_cache_head { | |
230 | time_t mtime; | |
231 | unsigned long time; /* cache age */ | |
232 | unsigned long end; /* last valid fpos in cache */ | |
233 | int eof; | |
234 | }; | |
235 | ||
236 | #define NCP_DIRCACHE_SIZE ((int)(PAGE_CACHE_SIZE/sizeof(struct dentry *))) | |
237 | union ncp_dir_cache { | |
238 | struct ncp_cache_head head; | |
239 | struct dentry *dentry[NCP_DIRCACHE_SIZE]; | |
240 | }; | |
241 | ||
242 | #define NCP_FIRSTCACHE_SIZE ((int)((NCP_DIRCACHE_SIZE * \ | |
243 | sizeof(struct dentry *) - sizeof(struct ncp_cache_head)) / \ | |
244 | sizeof(struct dentry *))) | |
245 | ||
246 | #define NCP_DIRCACHE_START (NCP_DIRCACHE_SIZE - NCP_FIRSTCACHE_SIZE) | |
247 | ||
248 | struct ncp_cache_control { | |
249 | struct ncp_cache_head head; | |
250 | struct page *page; | |
251 | union ncp_dir_cache *cache; | |
252 | unsigned long fpos, ofs; | |
253 | int filled, valid, idx; | |
254 | }; | |
255 | ||
256 | #endif /* _NCPLIB_H */ |