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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 | |
16 | #include <linux/fs.h> |
17 | #include <linux/types.h> |
18 | #include <linux/errno.h> |
19 | #include <linux/slab.h> |
20 | #include <linux/stat.h> |
21 | #include <linux/fcntl.h> |
22 | #include <linux/pagemap.h> |
23 | |
24 | #include <asm/uaccess.h> |
25 | #include <asm/byteorder.h> |
26 | #include <asm/unaligned.h> |
27 | #include <asm/string.h> |
28 | |
29 | #ifdef CONFIG_NCPFS_NLS |
30 | #include <linux/nls.h> |
31 | #else |
32 | #include <linux/ctype.h> |
33 | #endif /* CONFIG_NCPFS_NLS */ |
34 | |
35 | #include <linux/ncp_fs.h> |
36 | |
37 | #define NCP_MIN_SYMLINK_SIZE 8 |
38 | #define NCP_MAX_SYMLINK_SIZE 512 |
39 | |
40 | #define NCP_BLOCK_SHIFT 9 |
41 | #define NCP_BLOCK_SIZE (1 << (NCP_BLOCK_SHIFT)) |
42 | |
43 | int ncp_negotiate_buffersize(struct ncp_server *, int, int *); |
44 | int ncp_negotiate_size_and_options(struct ncp_server *server, int size, |
45 | int options, int *ret_size, int *ret_options); |
46 | |
47 | int ncp_get_volume_info_with_number(struct ncp_server* server, int n, |
48 | struct ncp_volume_info *target); |
49 | |
50 | int ncp_get_directory_info(struct ncp_server* server, __u8 dirhandle, |
51 | struct ncp_volume_info* target); |
52 | |
53 | int ncp_close_file(struct ncp_server *, const char *); |
54 | static inline int ncp_read_bounce_size(__u32 size) { |
55 | return sizeof(struct ncp_reply_header) + 2 + 2 + size + 8; |
56 | }; |
57 | int ncp_read_bounce(struct ncp_server *, const char *, __u32, __u16, |
58 | char __user *, int *, void* bounce, __u32 bouncelen); |
59 | int ncp_read_kernel(struct ncp_server *, const char *, __u32, __u16, |
60 | char *, int *); |
61 | int ncp_write_kernel(struct ncp_server *, const char *, __u32, __u16, |
62 | const char *, int *); |
63 | |
64 | static inline void ncp_inode_close(struct inode *inode) { |
65 | atomic_dec(&NCP_FINFO(inode)->opened); |
66 | } |
67 | |
68 | void ncp_extract_file_info(void* src, struct nw_info_struct* target); |
69 | int ncp_obtain_info(struct ncp_server *server, struct inode *, char *, |
70 | struct nw_info_struct *target); |
71 | int ncp_obtain_nfs_info(struct ncp_server *server, struct nw_info_struct *target); |
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 *, char *); |
84 | int ncp_open_create_file_or_subdir(struct ncp_server *, struct inode *, 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 *, char *, struct inode *, 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 | int mode, dev_t rdev, __le32 attributes); |
119 | |
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(dentry) (NCP_SERVER((dentry)->d_inode)->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(dentry) 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 | |
159 | static inline int ncp_strnicmp(struct nls_table *t, const unsigned char *s1, |
160 | 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) ((server)->dentry_ttl) |
174 | #define NCP_TEST_AGE(server,dentry) (NCP_GET_AGE(dentry) < NCP_MAX_AGE(server)) |
175 | |
176 | static inline void |
177 | ncp_age_dentry(struct ncp_server* server, struct dentry* dentry) |
178 | { |
179 | dentry->d_time = jiffies - server->dentry_ttl; |
180 | } |
181 | |
182 | static inline void |
183 | ncp_new_dentry(struct dentry* dentry) |
184 | { |
185 | dentry->d_time = jiffies; |
186 | } |
187 | |
188 | static inline void |
189 | ncp_renew_dentries(struct dentry *parent) |
190 | { |
191 | struct ncp_server *server = NCP_SERVER(parent->d_inode); |
192 | struct list_head *next; |
193 | struct dentry *dentry; |
194 | |
195 | spin_lock(&dcache_lock); |
196 | next = parent->d_subdirs.next; |
197 | while (next != &parent->d_subdirs) { |
198 | dentry = list_entry(next, struct dentry, d_u.d_child); |
199 | |
200 | if (dentry->d_fsdata == NULL) |
201 | ncp_age_dentry(server, dentry); |
202 | else |
203 | ncp_new_dentry(dentry); |
204 | |
205 | next = next->next; |
206 | } |
207 | spin_unlock(&dcache_lock); |
208 | } |
209 | |
210 | static inline void |
211 | ncp_invalidate_dircache_entries(struct dentry *parent) |
212 | { |
213 | struct ncp_server *server = NCP_SERVER(parent->d_inode); |
214 | struct list_head *next; |
215 | struct dentry *dentry; |
216 | |
217 | spin_lock(&dcache_lock); |
218 | next = parent->d_subdirs.next; |
219 | while (next != &parent->d_subdirs) { |
220 | dentry = list_entry(next, struct dentry, d_u.d_child); |
221 | dentry->d_fsdata = NULL; |
222 | ncp_age_dentry(server, dentry); |
223 | next = next->next; |
224 | } |
225 | spin_unlock(&dcache_lock); |
226 | } |
227 | |
228 | struct ncp_cache_head { |
229 | time_t mtime; |
230 | unsigned long time; /* cache age */ |
231 | unsigned long end; /* last valid fpos in cache */ |
232 | int eof; |
233 | }; |
234 | |
235 | #define NCP_DIRCACHE_SIZE ((int)(PAGE_CACHE_SIZE/sizeof(struct dentry *))) |
236 | union ncp_dir_cache { |
237 | struct ncp_cache_head head; |
238 | struct dentry *dentry[NCP_DIRCACHE_SIZE]; |
239 | }; |
240 | |
241 | #define NCP_FIRSTCACHE_SIZE ((int)((NCP_DIRCACHE_SIZE * \ |
242 | sizeof(struct dentry *) - sizeof(struct ncp_cache_head)) / \ |
243 | sizeof(struct dentry *))) |
244 | |
245 | #define NCP_DIRCACHE_START (NCP_DIRCACHE_SIZE - NCP_FIRSTCACHE_SIZE) |
246 | |
247 | struct ncp_cache_control { |
248 | struct ncp_cache_head head; |
249 | struct page *page; |
250 | union ncp_dir_cache *cache; |
251 | unsigned long fpos, ofs; |
252 | int filled, valid, idx; |
253 | }; |
254 | |
255 | #endif /* _NCPLIB_H */ |
256 |
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