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 43int ncp_negotiate_buffersize(struct ncp_server *, int, int *); 44int ncp_negotiate_size_and_options(struct ncp_server *server, int size, 45 int options, int *ret_size, int *ret_options); 46 47int ncp_get_volume_info_with_number(struct ncp_server* server, int n, 48 struct ncp_volume_info *target); 49 50int ncp_get_directory_info(struct ncp_server* server, __u8 dirhandle, 51 struct ncp_volume_info* target); 52 53int ncp_close_file(struct ncp_server *, const char *); 54static inline int ncp_read_bounce_size(__u32 size) { 55 return sizeof(struct ncp_reply_header) + 2 + 2 + size + 8; 56}; 57int ncp_read_bounce(struct ncp_server *, const char *, __u32, __u16, 58 char __user *, int *, void* bounce, __u32 bouncelen); 59int ncp_read_kernel(struct ncp_server *, const char *, __u32, __u16, 60 char *, int *); 61int ncp_write_kernel(struct ncp_server *, const char *, __u32, __u16, 62 const char *, int *); 63 64static inline void ncp_inode_close(struct inode *inode) { 65 atomic_dec(&NCP_FINFO(inode)->opened); 66} 67 68void ncp_extract_file_info(void* src, struct nw_info_struct* target); 69int ncp_obtain_info(struct ncp_server *server, struct inode *, char *, 70 struct nw_info_struct *target); 71int ncp_obtain_nfs_info(struct ncp_server *server, struct nw_info_struct *target); 72int ncp_get_volume_root(struct ncp_server *server, const char *volname, 73 __u32 *volume, __le32 *dirent, __le32 *dosdirent); 74int ncp_lookup_volume(struct ncp_server *, const char *, struct nw_info_struct *); 75int ncp_modify_file_or_subdir_dos_info(struct ncp_server *, struct inode *, 76 __le32, const struct nw_modify_dos_info *info); 77int 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); 79int ncp_modify_nfs_info(struct ncp_server *, __u8 volnum, __le32 dirent, 80 __u32 mode, __u32 rdev); 81 82int ncp_del_file_or_subdir2(struct ncp_server *, struct dentry*); 83int ncp_del_file_or_subdir(struct ncp_server *, struct inode *, char *); 84int ncp_open_create_file_or_subdir(struct ncp_server *, struct inode *, char *, 85 int, __le32, __le16, struct ncp_entry_info *); 86 87int ncp_initialize_search(struct ncp_server *, struct inode *, 88 struct nw_search_sequence *target); 89int 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 95int ncp_ren_or_mov_file_or_subdir(struct ncp_server *server, 96 struct inode *, char *, struct inode *, char *); 97 98 99int 100ncp_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 105int 106ncp_ClearPhysicalRecord(struct ncp_server *server, 107 const char *file_id, 108 __u32 offset, __u32 length); 109#endif /* CONFIG_NCPFS_IOCTL_LOCKING */ 110 111int 112ncp_mount_subdir(struct ncp_server *, __u8, __u8, __le32, 113 __u32* volume, __le32* dirent, __le32* dosdirent); 114int ncp_dirhandle_alloc(struct ncp_server *, __u8 vol, __le32 dirent, __u8 *dirhandle); 115int ncp_dirhandle_free(struct ncp_server *, __u8 dirhandle); 116 117int ncp_create_new(struct inode *dir, struct dentry *dentry, 118 int mode, dev_t rdev, __le32 attributes); 119 120static 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 131int ncp__io2vol(struct ncp_server *, unsigned char *, unsigned int *, 132 const unsigned char *, unsigned int, int); 133int 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 147int ncp__io2vol(unsigned char *, unsigned int *, 148 const unsigned char *, unsigned int, int); 149int 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 159static 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 176static inline void 177ncp_age_dentry(struct ncp_server* server, struct dentry* dentry) 178{ 179 dentry->d_time = jiffies - server->dentry_ttl; 180} 181 182static inline void 183ncp_new_dentry(struct dentry* dentry) 184{ 185 dentry->d_time = jiffies; 186} 187 188static inline void 189ncp_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 210static inline void 211ncp_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 228struct 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 *))) 236union 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 247struct 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