257 строки
7.6 KiB
C
257 строки
7.6 KiB
C
/*
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* ncplib_kernel.h
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*
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* Copyright (C) 1995, 1996 by Volker Lendecke
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* Modified for big endian by J.F. Chadima and David S. Miller
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* Modified 1997 Peter Waltenberg, Bill Hawes, David Woodhouse for 2.1 dcache
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* Modified 1998, 1999 Wolfram Pienkoss for NLS
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* Modified 1999 Wolfram Pienkoss for directory caching
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*
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*/
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#ifndef _NCPLIB_H
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#define _NCPLIB_H
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#include <linux/config.h>
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#include <linux/fs.h>
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#include <linux/types.h>
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#include <linux/errno.h>
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#include <linux/slab.h>
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#include <linux/stat.h>
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#include <linux/fcntl.h>
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#include <linux/pagemap.h>
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#include <asm/uaccess.h>
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#include <asm/byteorder.h>
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#include <asm/unaligned.h>
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#include <asm/string.h>
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#ifdef CONFIG_NCPFS_NLS
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#include <linux/nls.h>
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#else
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#include <linux/ctype.h>
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#endif /* CONFIG_NCPFS_NLS */
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#include <linux/ncp_fs.h>
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#define NCP_MIN_SYMLINK_SIZE 8
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#define NCP_MAX_SYMLINK_SIZE 512
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#define NCP_BLOCK_SHIFT 9
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#define NCP_BLOCK_SIZE (1 << (NCP_BLOCK_SHIFT))
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int ncp_negotiate_buffersize(struct ncp_server *, int, int *);
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int ncp_negotiate_size_and_options(struct ncp_server *server, int size,
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int options, int *ret_size, int *ret_options);
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int ncp_get_volume_info_with_number(struct ncp_server* server, int n,
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struct ncp_volume_info *target);
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int ncp_get_directory_info(struct ncp_server* server, __u8 dirhandle,
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struct ncp_volume_info* target);
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int ncp_close_file(struct ncp_server *, const char *);
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static inline int ncp_read_bounce_size(__u32 size) {
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return sizeof(struct ncp_reply_header) + 2 + 2 + size + 8;
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};
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int ncp_read_bounce(struct ncp_server *, const char *, __u32, __u16,
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char __user *, int *, void* bounce, __u32 bouncelen);
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int ncp_read_kernel(struct ncp_server *, const char *, __u32, __u16,
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char *, int *);
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int ncp_write_kernel(struct ncp_server *, const char *, __u32, __u16,
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const char *, int *);
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static inline void ncp_inode_close(struct inode *inode) {
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atomic_dec(&NCP_FINFO(inode)->opened);
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}
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void ncp_extract_file_info(void* src, struct nw_info_struct* target);
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int ncp_obtain_info(struct ncp_server *server, struct inode *, char *,
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struct nw_info_struct *target);
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int ncp_obtain_nfs_info(struct ncp_server *server, struct nw_info_struct *target);
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int ncp_get_volume_root(struct ncp_server *server, const char *volname,
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__u32 *volume, __le32 *dirent, __le32 *dosdirent);
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int ncp_lookup_volume(struct ncp_server *, const char *, struct nw_info_struct *);
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int ncp_modify_file_or_subdir_dos_info(struct ncp_server *, struct inode *,
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__le32, const struct nw_modify_dos_info *info);
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int ncp_modify_file_or_subdir_dos_info_path(struct ncp_server *, struct inode *,
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const char* path, __le32, const struct nw_modify_dos_info *info);
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int ncp_modify_nfs_info(struct ncp_server *, __u8 volnum, __le32 dirent,
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__u32 mode, __u32 rdev);
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int ncp_del_file_or_subdir2(struct ncp_server *, struct dentry*);
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int ncp_del_file_or_subdir(struct ncp_server *, struct inode *, char *);
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int ncp_open_create_file_or_subdir(struct ncp_server *, struct inode *, char *,
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int, __le32, __le16, struct ncp_entry_info *);
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int ncp_initialize_search(struct ncp_server *, struct inode *,
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struct nw_search_sequence *target);
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int ncp_search_for_fileset(struct ncp_server *server,
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struct nw_search_sequence *seq,
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int* more, int* cnt,
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char* buffer, size_t bufsize,
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char** rbuf, size_t* rsize);
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int ncp_ren_or_mov_file_or_subdir(struct ncp_server *server,
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struct inode *, char *, struct inode *, char *);
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int
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ncp_LogPhysicalRecord(struct ncp_server *server,
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const char *file_id, __u8 locktype,
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__u32 offset, __u32 length, __u16 timeout);
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#ifdef CONFIG_NCPFS_IOCTL_LOCKING
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int
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ncp_ClearPhysicalRecord(struct ncp_server *server,
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const char *file_id,
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__u32 offset, __u32 length);
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#endif /* CONFIG_NCPFS_IOCTL_LOCKING */
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int
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ncp_mount_subdir(struct ncp_server *, __u8, __u8, __le32,
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__u32* volume, __le32* dirent, __le32* dosdirent);
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int ncp_dirhandle_alloc(struct ncp_server *, __u8 vol, __le32 dirent, __u8 *dirhandle);
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int ncp_dirhandle_free(struct ncp_server *, __u8 dirhandle);
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int ncp_create_new(struct inode *dir, struct dentry *dentry,
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int mode, dev_t rdev, __le32 attributes);
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static inline int ncp_is_nfs_extras(struct ncp_server* server, unsigned int volnum) {
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#ifdef CONFIG_NCPFS_NFS_NS
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return (server->m.flags & NCP_MOUNT_NFS_EXTRAS) &&
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(server->name_space[volnum] == NW_NS_NFS);
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#else
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return 0;
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#endif
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}
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#ifdef CONFIG_NCPFS_NLS
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int ncp__io2vol(struct ncp_server *, unsigned char *, unsigned int *,
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const unsigned char *, unsigned int, int);
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int ncp__vol2io(struct ncp_server *, unsigned char *, unsigned int *,
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const unsigned char *, unsigned int, int);
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#define NCP_ESC ':'
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#define NCP_IO_TABLE(dentry) (NCP_SERVER((dentry)->d_inode)->nls_io)
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#define ncp_tolower(t, c) nls_tolower(t, c)
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#define ncp_toupper(t, c) nls_toupper(t, c)
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#define ncp_strnicmp(t, s1, s2, len) \
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nls_strnicmp(t, s1, s2, len)
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#define ncp_io2vol(S,m,i,n,k,U) ncp__io2vol(S,m,i,n,k,U)
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#define ncp_vol2io(S,m,i,n,k,U) ncp__vol2io(S,m,i,n,k,U)
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#else
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int ncp__io2vol(unsigned char *, unsigned int *,
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const unsigned char *, unsigned int, int);
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int ncp__vol2io(unsigned char *, unsigned int *,
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const unsigned char *, unsigned int, int);
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#define NCP_IO_TABLE(dentry) NULL
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#define ncp_tolower(t, c) tolower(c)
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#define ncp_toupper(t, c) toupper(c)
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#define ncp_io2vol(S,m,i,n,k,U) ncp__io2vol(m,i,n,k,U)
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#define ncp_vol2io(S,m,i,n,k,U) ncp__vol2io(m,i,n,k,U)
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static inline int ncp_strnicmp(struct nls_table *t, const unsigned char *s1,
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const unsigned char *s2, int len)
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{
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while (len--) {
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if (tolower(*s1++) != tolower(*s2++))
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return 1;
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}
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return 0;
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}
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#endif /* CONFIG_NCPFS_NLS */
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#define NCP_GET_AGE(dentry) (jiffies - (dentry)->d_time)
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#define NCP_MAX_AGE(server) ((server)->dentry_ttl)
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#define NCP_TEST_AGE(server,dentry) (NCP_GET_AGE(dentry) < NCP_MAX_AGE(server))
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static inline void
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ncp_age_dentry(struct ncp_server* server, struct dentry* dentry)
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{
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dentry->d_time = jiffies - server->dentry_ttl;
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}
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static inline void
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ncp_new_dentry(struct dentry* dentry)
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{
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dentry->d_time = jiffies;
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}
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static inline void
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ncp_renew_dentries(struct dentry *parent)
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{
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struct ncp_server *server = NCP_SERVER(parent->d_inode);
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struct list_head *next;
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struct dentry *dentry;
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spin_lock(&dcache_lock);
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next = parent->d_subdirs.next;
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while (next != &parent->d_subdirs) {
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dentry = list_entry(next, struct dentry, d_u.d_child);
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if (dentry->d_fsdata == NULL)
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ncp_age_dentry(server, dentry);
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else
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ncp_new_dentry(dentry);
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next = next->next;
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}
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spin_unlock(&dcache_lock);
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}
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static inline void
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ncp_invalidate_dircache_entries(struct dentry *parent)
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{
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struct ncp_server *server = NCP_SERVER(parent->d_inode);
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struct list_head *next;
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struct dentry *dentry;
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spin_lock(&dcache_lock);
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next = parent->d_subdirs.next;
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while (next != &parent->d_subdirs) {
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dentry = list_entry(next, struct dentry, d_u.d_child);
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dentry->d_fsdata = NULL;
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ncp_age_dentry(server, dentry);
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next = next->next;
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}
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spin_unlock(&dcache_lock);
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}
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struct ncp_cache_head {
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time_t mtime;
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unsigned long time; /* cache age */
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unsigned long end; /* last valid fpos in cache */
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int eof;
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};
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#define NCP_DIRCACHE_SIZE ((int)(PAGE_CACHE_SIZE/sizeof(struct dentry *)))
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union ncp_dir_cache {
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struct ncp_cache_head head;
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struct dentry *dentry[NCP_DIRCACHE_SIZE];
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};
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#define NCP_FIRSTCACHE_SIZE ((int)((NCP_DIRCACHE_SIZE * \
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sizeof(struct dentry *) - sizeof(struct ncp_cache_head)) / \
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sizeof(struct dentry *)))
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#define NCP_DIRCACHE_START (NCP_DIRCACHE_SIZE - NCP_FIRSTCACHE_SIZE)
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struct ncp_cache_control {
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struct ncp_cache_head head;
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struct page *page;
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union ncp_dir_cache *cache;
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unsigned long fpos, ofs;
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int filled, valid, idx;
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};
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#endif /* _NCPLIB_H */
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