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/*
Unix SMB/CIFS implementation.
POSIX NTVFS backend - structure definitions
Copyright (C) Andrew Tridgell 2004
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef _VFS_POSIX_H_
#define _VFS_POSIX_H_
/* this is the private structure for the posix vfs backend. It is used
to hold per-connection (per tree connect) state information */
struct pvfs_state {
struct smbsrv_tcon *tcon;
const char *base_directory;
const char *share_name;
uint_t flags;
struct pvfs_file *open_files;
struct pvfs_mangle_context *mangle_ctx;
struct brl_context *brl_context;
struct odb_context *odb_context;
/* an id tree mapping open search ID to a pvfs_search_state structure */
struct idr_context *idtree_search;
/* an id tree mapping open file handle -> struct pvfs_file */
struct idr_context *idtree_fnum;
};
/* this is the basic information needed about a file from the filesystem */
struct pvfs_dos_fileinfo {
NTTIME create_time;
NTTIME access_time;
NTTIME write_time;
NTTIME change_time;
uint32_t attrib;
uint64_t alloc_size;
uint32_t nlink;
uint32_t ea_size;
uint64_t file_id;
};
/*
this is the structure returned by pvfs_resolve_name(). It holds the posix details of
a filename passed by the client to any function
*/
struct pvfs_filename {
const char *original_name;
char *full_name;
const char *stream_name;
BOOL has_wildcard;
BOOL exists;
struct stat st;
struct pvfs_dos_fileinfo dos;
};
/* this holds a list of file names for a search. We deliberately do
not hold the file stat information here to minimise the memory
overhead of idle searches */
struct pvfs_dir {
uint_t count;
const char *unix_path;
const char **names;
};
/* the state of a search started with pvfs_search_first() */
struct pvfs_search_state {
struct pvfs_state *pvfs;
uint16_t handle;
uint_t current_index;
uint16_t search_attrib;
uint16_t must_attrib;
struct pvfs_dir *dir;
};
/* open file state */
struct pvfs_file {
struct pvfs_file *next, *prev;
int fd;
uint16_t fnum;
struct pvfs_filename *name;
/* we need to remember the session it was opened on,
as it is illegal to operate on someone elses fnum */
struct smbsrv_session *session;
/* we need to remember the client pid that
opened the file so SMBexit works */
uint16_t smbpid;
/* a unique file key to be used for file locking */
DATA_BLOB locking_key;
/* we need this hook back to our parent for lock destruction */
struct pvfs_state *pvfs;
/* a list of pending locks - used for locking cancel operations */
struct pvfs_pending_lock *pending_list;
/* a count of active locks - used to avoid calling brl_close on
file close */
uint64_t lock_count;
uint32_t create_options;
uint32_t share_access;
uint32_t access_mask;
/* yes, we need 2 independent positions ... */
uint64_t seek_offset;
uint64_t position;
};
struct pvfs_mangle_context {
uint8_t char_flags[256];
/*
this determines how many characters are used from the original
filename in the 8.3 mangled name. A larger value leads to a weaker
hash and more collisions. The largest possible value is 6.
*/
int mangle_prefix;
uint32_t mangle_modulus;
/* we will use a very simple direct mapped prefix cache. The big
advantage of this cache structure is speed and low memory usage
The cache is indexed by the low-order bits of the hash, and confirmed by
hashing the resulting cache entry to match the known hash
*/
char **prefix_cache;
uint32_t *prefix_cache_hashes;
/* this is used to reverse the base 36 mapping */
unsigned char base_reverse[256];
};
/* flags to pvfs_resolve_name() */
#define PVFS_RESOLVE_NO_WILDCARD (1<<0)
#define PVFS_RESOLVE_STREAMS (1<<1)
/* flags in pvfs->flags */
#define PVFS_FLAG_CI_FILESYSTEM (1<<0) /* the filesystem is case insensitive */
#define PVFS_FLAG_MAP_ARCHIVE (1<<1)
#define PVFS_FLAG_MAP_SYSTEM (1<<2)
#define PVFS_FLAG_MAP_HIDDEN (1<<3)
#define PVFS_FLAG_READONLY (1<<4)
#define PVFS_FLAG_STRICT_SYNC (1<<5)
#define PVFS_FLAG_STRICT_LOCKING (1<<6)
#endif /* _VFS_POSIX_H_ */
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