FreeBSD/Linux Kernel Cross Reference
sys/fs/ncpfs/ncplib_kernel.h

     /*
      *  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 */

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