fs/ncpfs/ncplib_kernel.h - maze/linux - Git at Google

 /*
  *  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/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* server, int n,
 				    struct ncp_volume_info *target);

 int ncp_get_directory_info(struct ncp_server* server, __u8 dirhandle,
 			   struct ncp_volume_info* target);

 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 __user *, 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);
 }

 void ncp_extract_file_info(const void* src, struct nw_info_struct* target);
 int ncp_obtain_info(struct ncp_server *server, struct inode *, const char *,
 		struct nw_info_struct *target);
 int ncp_obtain_nfs_info(struct ncp_server *server, struct nw_info_struct *target);
 int ncp_update_known_namespace(struct ncp_server *server, __u8 volume, int *ret_ns);
 int ncp_get_volume_root(struct ncp_server *server, const char *volname,
 			__u32 *volume, __le32 *dirent, __le32 *dosdirent);
 int ncp_lookup_volume(struct ncp_server *, const char *, struct nw_info_struct *);
 int ncp_modify_file_or_subdir_dos_info(struct ncp_server *, struct inode *,
 	 __le32, const struct nw_modify_dos_info *info);
 int ncp_modify_file_or_subdir_dos_info_path(struct ncp_server *, struct inode *,
 	 const char* path, __le32, const struct nw_modify_dos_info *info);
 int ncp_modify_nfs_info(struct ncp_server *, __u8 volnum, __le32 dirent,
 			__u32 mode, __u32 rdev);

 int ncp_del_file_or_subdir2(struct ncp_server *, struct dentry*);
 int ncp_del_file_or_subdir(struct ncp_server *, struct inode *, const char *);
 int ncp_open_create_file_or_subdir(struct ncp_server *, struct inode *, const char *,
 				int, __le32, __le16, struct ncp_entry_info *);

 int ncp_initialize_search(struct ncp_server *, struct inode *,
 		      struct nw_search_sequence *target);
 int ncp_search_for_fileset(struct ncp_server *server,
 			   struct nw_search_sequence *seq,
 			   int* more, int* cnt,
 			   char* buffer, size_t bufsize,
 			   char** rbuf, size_t* rsize);

 int ncp_ren_or_mov_file_or_subdir(struct ncp_server *server,
 			      struct inode *, const char *, struct inode *, const 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 *, __u8, __u8, __le32,
 		 __u32* volume, __le32* dirent, __le32* dosdirent);
 int ncp_dirhandle_alloc(struct ncp_server *, __u8 vol, __le32 dirent, __u8 *dirhandle);
 int ncp_dirhandle_free(struct ncp_server *, __u8 dirhandle);

 int ncp_create_new(struct inode *dir, struct dentry *dentry,
                           int mode, dev_t rdev, __le32 attributes);

 static inline int ncp_is_nfs_extras(struct ncp_server* server, unsigned int volnum) {
 #ifdef CONFIG_NCPFS_NFS_NS
 	return (server->m.flags & NCP_MOUNT_NFS_EXTRAS) &&
 	       (server->name_space[volnum] == NW_NS_NFS);
 #else
 	return 0;
 #endif
 }

 #ifdef CONFIG_NCPFS_NLS

 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(sb)	(NCP_SBP(sb)->nls_io)
 #define ncp_tolower(t, c)	nls_tolower(t, c)
 #define ncp_toupper(t, c)	nls_toupper(t, c)
 #define ncp_strnicmp(t, s1, s2, len) \
 	nls_strnicmp(t, s1, s2, len)
 #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(sb)	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)


 static inline int ncp_strnicmp(const struct nls_table *t,
 		const unsigned char *s1, const unsigned char *s2, int len)
 {
 	while (len--) {
 		if (tolower(*s1++) != tolower(*s2++))
 			return 1;
 	}

 	return 0;
 }

 #endif /* CONFIG_NCPFS_NLS */

 #define NCP_GET_AGE(dentry)	(jiffies - (dentry)->d_time)
 #define NCP_MAX_AGE(server)	atomic_read(&(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 - NCP_MAX_AGE(server);
 }

 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);
 	spin_lock(&parent->d_lock);
 	next = parent->d_subdirs.next;
 	while (next != &parent->d_subdirs) {
 		dentry = list_entry(next, struct dentry, d_u.d_child);

 		if (dentry->d_fsdata == NULL)
 			ncp_age_dentry(server, dentry);
 		else
 			ncp_new_dentry(dentry);

 		next = next->next;
 	}
 	spin_unlock(&parent->d_lock);
 	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);
 	spin_lock(&parent->d_lock);
 	next = parent->d_subdirs.next;
 	while (next != &parent->d_subdirs) {
 		dentry = list_entry(next, struct dentry, d_u.d_child);
 		dentry->d_fsdata = NULL;
 		ncp_age_dentry(server, dentry);
 		next = next->next;
 	}
 	spin_unlock(&parent->d_lock);
 	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 */
	/*
	* 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/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* server, int n,
	struct ncp_volume_info *target);

	int ncp_get_directory_info(struct ncp_server* server, __u8 dirhandle,
	struct ncp_volume_info* target);

	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 __user , 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);
	}

	void ncp_extract_file_info(const void* src, struct nw_info_struct* target);
	int ncp_obtain_info(struct ncp_server server, struct inode , const char *,
	struct nw_info_struct *target);
	int ncp_obtain_nfs_info(struct ncp_server server, struct nw_info_struct target);
	int ncp_update_known_namespace(struct ncp_server server, __u8 volume, int ret_ns);
	int ncp_get_volume_root(struct ncp_server server, const char volname,
	__u32 volume, __le32 dirent, __le32 *dosdirent);
	int ncp_lookup_volume(struct ncp_server , const char , struct nw_info_struct *);
	int ncp_modify_file_or_subdir_dos_info(struct ncp_server , struct inode ,
	__le32, const struct nw_modify_dos_info *info);
	int ncp_modify_file_or_subdir_dos_info_path(struct ncp_server , struct inode ,
	const char* path, __le32, const struct nw_modify_dos_info *info);
	int ncp_modify_nfs_info(struct ncp_server *, __u8 volnum, __le32 dirent,
	__u32 mode, __u32 rdev);

	int ncp_del_file_or_subdir2(struct ncp_server , struct dentry);
	int ncp_del_file_or_subdir(struct ncp_server , struct inode , const char *);
	int ncp_open_create_file_or_subdir(struct ncp_server , struct inode , const char *,
	int, __le32, __le16, struct ncp_entry_info *);

	int ncp_initialize_search(struct ncp_server , struct inode ,
	struct nw_search_sequence *target);
	int ncp_search_for_fileset(struct ncp_server *server,
	struct nw_search_sequence *seq,
	int* more, int* cnt,
	char* buffer, size_t bufsize,
	char** rbuf, size_t* rsize);

	int ncp_ren_or_mov_file_or_subdir(struct ncp_server *server,
	struct inode , const char , struct inode , const 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 *, __u8, __u8, __le32,
	__u32* volume, __le32* dirent, __le32* dosdirent);
	int ncp_dirhandle_alloc(struct ncp_server , __u8 vol, __le32 dirent, __u8 dirhandle);
	int ncp_dirhandle_free(struct ncp_server *, __u8 dirhandle);

	int ncp_create_new(struct inode dir, struct dentry dentry,
	int mode, dev_t rdev, __le32 attributes);

	static inline int ncp_is_nfs_extras(struct ncp_server* server, unsigned int volnum) {
	#ifdef CONFIG_NCPFS_NFS_NS
	return (server->m.flags & NCP_MOUNT_NFS_EXTRAS) &&
	(server->name_space[volnum] == NW_NS_NFS);
	#else
	return 0;
	#endif
	}

	#ifdef CONFIG_NCPFS_NLS

	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(sb) (NCP_SBP(sb)->nls_io)
	#define ncp_tolower(t, c) nls_tolower(t, c)
	#define ncp_toupper(t, c) nls_toupper(t, c)
	#define ncp_strnicmp(t, s1, s2, len) \
	nls_strnicmp(t, s1, s2, len)
	#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(sb) 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)


	static inline int ncp_strnicmp(const struct nls_table *t,
	const unsigned char s1, const unsigned char s2, int len)
	{
	while (len--) {
	if (tolower(s1++) != tolower(s2++))
	return 1;
	}

	return 0;
	}

	#endif /* CONFIG_NCPFS_NLS */

	#define NCP_GET_AGE(dentry) (jiffies - (dentry)->d_time)
	#define NCP_MAX_AGE(server) atomic_read(&(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 - NCP_MAX_AGE(server);
	}

	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);
	spin_lock(&parent->d_lock);
	next = parent->d_subdirs.next;
	while (next != &parent->d_subdirs) {
	dentry = list_entry(next, struct dentry, d_u.d_child);

	if (dentry->d_fsdata == NULL)
	ncp_age_dentry(server, dentry);
	else
	ncp_new_dentry(dentry);

	next = next->next;
	}
	spin_unlock(&parent->d_lock);
	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);
	spin_lock(&parent->d_lock);
	next = parent->d_subdirs.next;
	while (next != &parent->d_subdirs) {
	dentry = list_entry(next, struct dentry, d_u.d_child);
	dentry->d_fsdata = NULL;
	ncp_age_dentry(server, dentry);
	next = next->next;
	}
	spin_unlock(&parent->d_lock);
	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 */