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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 */