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