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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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
44int ncp_negotiate_buffersize(struct ncp_server *, int, int *);
45int ncp_negotiate_size_and_options(struct ncp_server *server, int size,
46 int options, int *ret_size, int *ret_options);
47
48int ncp_get_volume_info_with_number(struct ncp_server* server, int n,
49 struct ncp_volume_info *target);
50
51int ncp_get_directory_info(struct ncp_server* server, __u8 dirhandle,
52 struct ncp_volume_info* target);
53
54int ncp_close_file(struct ncp_server *, const char *);
55static inline int ncp_read_bounce_size(__u32 size) {
56 return sizeof(struct ncp_reply_header) + 2 + 2 + size + 8;
57};
58int ncp_read_bounce(struct ncp_server *, const char *, __u32, __u16,
59 char __user *, int *, void* bounce, __u32 bouncelen);
60int ncp_read_kernel(struct ncp_server *, const char *, __u32, __u16,
61 char *, int *);
62int ncp_write_kernel(struct ncp_server *, const char *, __u32, __u16,
63 const char *, int *);
64
65static inline void ncp_inode_close(struct inode *inode) {
66 atomic_dec(&NCP_FINFO(inode)->opened);
67}
68
69void ncp_extract_file_info(void* src, struct nw_info_struct* target);
70int ncp_obtain_info(struct ncp_server *server, struct inode *, char *,
71 struct nw_info_struct *target);
72int ncp_obtain_nfs_info(struct ncp_server *server, struct nw_info_struct *target);
73int ncp_get_volume_root(struct ncp_server *server, const char *volname,
74 __u32 *volume, __le32 *dirent, __le32 *dosdirent);
75int ncp_lookup_volume(struct ncp_server *, const char *, struct nw_info_struct *);
76int ncp_modify_file_or_subdir_dos_info(struct ncp_server *, struct inode *,
77 __le32, const struct nw_modify_dos_info *info);
78int 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);
80int ncp_modify_nfs_info(struct ncp_server *, __u8 volnum, __le32 dirent,
81 __u32 mode, __u32 rdev);
82
83int ncp_del_file_or_subdir2(struct ncp_server *, struct dentry*);
84int ncp_del_file_or_subdir(struct ncp_server *, struct inode *, char *);
85int ncp_open_create_file_or_subdir(struct ncp_server *, struct inode *, char *,
86 int, __le32, __le16, struct ncp_entry_info *);
87
88int ncp_initialize_search(struct ncp_server *, struct inode *,
89 struct nw_search_sequence *target);
Linus Torvalds1da177e2005-04-16 15:20:36 -070090int 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
96int ncp_ren_or_mov_file_or_subdir(struct ncp_server *server,
97 struct inode *, char *, struct inode *, char *);
98
99
100int
101ncp_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
106int
107ncp_ClearPhysicalRecord(struct ncp_server *server,
108 const char *file_id,
109 __u32 offset, __u32 length);
110#endif /* CONFIG_NCPFS_IOCTL_LOCKING */
111
112int
113ncp_mount_subdir(struct ncp_server *, __u8, __u8, __le32,
114 __u32* volume, __le32* dirent, __le32* dosdirent);
115int ncp_dirhandle_alloc(struct ncp_server *, __u8 vol, __le32 dirent, __u8 *dirhandle);
116int ncp_dirhandle_free(struct ncp_server *, __u8 dirhandle);
117
118int ncp_create_new(struct inode *dir, struct dentry *dentry,
119 int mode, dev_t rdev, __le32 attributes);
120
121static 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
132int ncp__io2vol(struct ncp_server *, unsigned char *, unsigned int *,
133 const unsigned char *, unsigned int, int);
134int 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
148int ncp__io2vol(unsigned char *, unsigned int *,
149 const unsigned char *, unsigned int, int);
150int 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
160static 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
177static inline void
178ncp_age_dentry(struct ncp_server* server, struct dentry* dentry)
179{
180 dentry->d_time = jiffies - server->dentry_ttl;
181}
182
183static inline void
184ncp_new_dentry(struct dentry* dentry)
185{
186 dentry->d_time = jiffies;
187}
188
189static inline void
190ncp_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) {
Eric Dumazet5160ee62006-01-08 01:03:32 -0800199 dentry = list_entry(next, struct dentry, d_u.d_child);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200
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
211static inline void
212ncp_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) {
Eric Dumazet5160ee62006-01-08 01:03:32 -0800221 dentry = list_entry(next, struct dentry, d_u.d_child);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222 dentry->d_fsdata = NULL;
223 ncp_age_dentry(server, dentry);
224 next = next->next;
225 }
226 spin_unlock(&dcache_lock);
227}
228
229struct 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 *)))
237union 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
248struct 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 */