ncplib_kernel.h
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上传日期:2013-04-10
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- /*
- * ncplib_kernel.h
- *
- * Copyright (C) 1995, 1996 by Volker Lendecke
- * Modified for big endian by J.F. Chadima and David S. Miller
- * Modified 1997 Peter Waltenberg, Bill Hawes, David Woodhouse for 2.1 dcache
- * Modified 1998, 1999 Wolfram Pienkoss for NLS
- * Modified 1999 Wolfram Pienkoss for directory caching
- *
- */
- #ifndef _NCPLIB_H
- #define _NCPLIB_H
- #include <linux/config.h>
- #include <linux/fs.h>
- #include <linux/types.h>
- #include <linux/errno.h>
- #include <linux/slab.h>
- #include <linux/stat.h>
- #include <linux/fcntl.h>
- #include <linux/pagemap.h>
- #include <asm/uaccess.h>
- #include <asm/byteorder.h>
- #include <asm/unaligned.h>
- #include <asm/string.h>
- #ifdef CONFIG_NCPFS_NLS
- #include <linux/nls.h>
- #else
- #include <linux/ctype.h>
- #endif /* CONFIG_NCPFS_NLS */
- #include <linux/ncp_fs.h>
- #define NCP_MIN_SYMLINK_SIZE 8
- #define NCP_MAX_SYMLINK_SIZE 512
- #define NCP_BLOCK_SHIFT 9
- #define NCP_BLOCK_SIZE (1 << (NCP_BLOCK_SHIFT))
- int ncp_negotiate_buffersize(struct ncp_server *, int, int *);
- int ncp_negotiate_size_and_options(struct ncp_server *server, int size,
- int options, int *ret_size, int *ret_options);
- int ncp_get_volume_info_with_number(struct ncp_server *, int,
- struct ncp_volume_info *);
- int ncp_close_file(struct ncp_server *, const char *);
- static inline int ncp_read_bounce_size(__u32 size) {
- return sizeof(struct ncp_reply_header) + 2 + 2 + size + 8;
- };
- int ncp_read_bounce(struct ncp_server *, const char *, __u32, __u16,
- char *, int *, void* bounce, __u32 bouncelen);
- int ncp_read_kernel(struct ncp_server *, const char *, __u32, __u16,
- char *, int *);
- int ncp_write_kernel(struct ncp_server *, const char *, __u32, __u16,
- const char *, int *);
- static inline void ncp_inode_close(struct inode *inode) {
- atomic_dec(&NCP_FINFO(inode)->opened);
- }
- int ncp_obtain_info(struct ncp_server *server, struct inode *, char *,
- struct nw_info_struct *target);
- int ncp_lookup_volume(struct ncp_server *, char *, struct nw_info_struct *);
- int ncp_modify_file_or_subdir_dos_info(struct ncp_server *, struct inode *,
- __u32, const struct nw_modify_dos_info *info);
- int ncp_modify_file_or_subdir_dos_info_path(struct ncp_server *, struct inode *,
- const char* path, __u32, const struct nw_modify_dos_info *info);
- int ncp_del_file_or_subdir2(struct ncp_server *, struct dentry*);
- int ncp_del_file_or_subdir(struct ncp_server *, struct inode *, char *);
- int ncp_open_create_file_or_subdir(struct ncp_server *, struct inode *, char *,
- int, __u32, int, struct ncp_entry_info *);
- int ncp_initialize_search(struct ncp_server *, struct inode *,
- struct nw_search_sequence *target);
- int ncp_search_for_file_or_subdir(struct ncp_server *server,
- struct nw_search_sequence *seq,
- struct nw_info_struct *target);
- int ncp_ren_or_mov_file_or_subdir(struct ncp_server *server,
- struct inode *, char *, struct inode *, char *);
- int
- ncp_LogPhysicalRecord(struct ncp_server *server,
- const char *file_id, __u8 locktype,
- __u32 offset, __u32 length, __u16 timeout);
- #ifdef CONFIG_NCPFS_IOCTL_LOCKING
- int
- ncp_ClearPhysicalRecord(struct ncp_server *server,
- const char *file_id,
- __u32 offset, __u32 length);
- #endif /* CONFIG_NCPFS_IOCTL_LOCKING */
- int
- ncp_mount_subdir(struct ncp_server *, struct nw_info_struct *,
- __u8, __u8, __u32);
- #ifdef CONFIG_NCPFS_NLS
- unsigned char ncp__tolower(struct nls_table *, unsigned char);
- unsigned char ncp__toupper(struct nls_table *, unsigned char);
- int ncp__io2vol(struct ncp_server *, unsigned char *, unsigned int *,
- const unsigned char *, unsigned int, int);
- int ncp__vol2io(struct ncp_server *, unsigned char *, unsigned int *,
- const unsigned char *, unsigned int, int);
- #define NCP_ESC ':'
- #define NCP_IO_TABLE(dentry) (NCP_SERVER((dentry)->d_inode)->nls_io)
- #define ncp_tolower(t, c) ncp__tolower(t, c)
- #define ncp_toupper(t, c) ncp__toupper(t, c)
- #define ncp_io2vol(S,m,i,n,k,U) ncp__io2vol(S,m,i,n,k,U)
- #define ncp_vol2io(S,m,i,n,k,U) ncp__vol2io(S,m,i,n,k,U)
- #else
- int ncp__io2vol(unsigned char *, unsigned int *,
- const unsigned char *, unsigned int, int);
- int ncp__vol2io(unsigned char *, unsigned int *,
- const unsigned char *, unsigned int, int);
- #define NCP_IO_TABLE(dentry) NULL
- #define ncp_tolower(t, c) tolower(c)
- #define ncp_toupper(t, c) toupper(c)
- #define ncp_io2vol(S,m,i,n,k,U) ncp__io2vol(m,i,n,k,U)
- #define ncp_vol2io(S,m,i,n,k,U) ncp__vol2io(m,i,n,k,U)
- #endif /* CONFIG_NCPFS_NLS */
- inline int
- ncp_strnicmp(struct nls_table *,
- const unsigned char *, const unsigned char *, int);
- #define NCP_GET_AGE(dentry) (jiffies - (dentry)->d_time)
- #define NCP_MAX_AGE(server) ((server)->dentry_ttl)
- #define NCP_TEST_AGE(server,dentry) (NCP_GET_AGE(dentry) < NCP_MAX_AGE(server))
- static inline void
- ncp_age_dentry(struct ncp_server* server, struct dentry* dentry)
- {
- dentry->d_time = jiffies - server->dentry_ttl;
- }
- static inline void
- ncp_new_dentry(struct dentry* dentry)
- {
- dentry->d_time = jiffies;
- }
- static inline void
- ncp_renew_dentries(struct dentry *parent)
- {
- struct ncp_server *server = NCP_SERVER(parent->d_inode);
- struct list_head *next;
- struct dentry *dentry;
- spin_lock(&dcache_lock);
- next = parent->d_subdirs.next;
- while (next != &parent->d_subdirs) {
- dentry = list_entry(next, struct dentry, d_child);
- if (dentry->d_fsdata == NULL)
- ncp_age_dentry(server, dentry);
- else
- ncp_new_dentry(dentry);
- next = next->next;
- }
- spin_unlock(&dcache_lock);
- }
- static inline void
- ncp_invalidate_dircache_entries(struct dentry *parent)
- {
- struct ncp_server *server = NCP_SERVER(parent->d_inode);
- struct list_head *next;
- struct dentry *dentry;
- spin_lock(&dcache_lock);
- next = parent->d_subdirs.next;
- while (next != &parent->d_subdirs) {
- dentry = list_entry(next, struct dentry, d_child);
- dentry->d_fsdata = NULL;
- ncp_age_dentry(server, dentry);
- next = next->next;
- }
- spin_unlock(&dcache_lock);
- }
- struct ncp_cache_head {
- time_t mtime;
- unsigned long time; /* cache age */
- unsigned long end; /* last valid fpos in cache */
- int eof;
- };
- #define NCP_DIRCACHE_SIZE ((int)(PAGE_CACHE_SIZE/sizeof(struct dentry *)))
- union ncp_dir_cache {
- struct ncp_cache_head head;
- struct dentry *dentry[NCP_DIRCACHE_SIZE];
- };
- #define NCP_FIRSTCACHE_SIZE ((int)((NCP_DIRCACHE_SIZE *
- sizeof(struct dentry *) - sizeof(struct ncp_cache_head)) /
- sizeof(struct dentry *)))
- #define NCP_DIRCACHE_START (NCP_DIRCACHE_SIZE - NCP_FIRSTCACHE_SIZE)
- struct ncp_cache_control {
- struct ncp_cache_head head;
- struct page *page;
- union ncp_dir_cache *cache;
- unsigned long fpos, ofs;
- int filled, valid, idx;
- };
- #endif /* _NCPLIB_H */