summaryrefslogtreecommitdiff
path: root/source4/ntvfs/posix/vfs_posix.h
blob: f34529bc0f1d75a6e201ecd22758e4b6b88f422e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
/* 
   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_

#include "librpc/gen_ndr/xattr.h"
#include "system/filesys.h"
#include "ntvfs/ntvfs.h"
#include "ntvfs/common/proto.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 ntvfs_module_context *ntvfs;
	const char *base_directory;
	struct GUID *base_fs_uuid;

	const char *share_name;
	uint_t flags;

	struct pvfs_mangle_context *mangle_ctx;

	struct brl_context *brl_context;
	struct odb_context *odb_context;
	struct notify_context *notify_context;
	struct sidmap_context *sidmap;

	/* a list of pending async requests. Needed to support
	   ntcancel */
	struct pvfs_wait *wait_list;

	/* the sharing violation timeout */
	uint_t sharing_violation_delay;

	/* filesystem attributes (see FS_ATTR_*) */
	uint32_t fs_attribs;

	/* if posix:eadb is set, then this gets setup */
	struct tdb_wrap *ea_db;

	/* the allocation size rounding */
	uint32_t alloc_size_rounding;

	struct {
		/* an id tree mapping open file handle -> struct pvfs_file */
		struct idr_context *idtree;

		/* the open files as DLINKLIST */
		struct pvfs_file *list;
	} files;

	struct {
		/* an id tree mapping open search ID to a pvfs_search_state structure */
		struct idr_context *idtree;

		/* the open searches as DLINKLIST */
		struct pvfs_search_state *list;

		/* how long to keep inactive searches around for */
		uint_t inactivity_time;
	} search;

	/* used to accelerate acl mapping */
	struct {
		const struct dom_sid *creator_owner;
		const struct dom_sid *creator_group;		
	} sid_cache;
};

/* 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;
	uint32_t flags;
};

/*
  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; /* does not include :$DATA suffix */
	uint32_t stream_id;      /* this uses a hash, so is probabilistic */
	BOOL has_wildcard;
	BOOL exists;          /* true if the base filename exists */
	BOOL stream_exists;   /* true if the stream exists */
	struct stat st;
	struct pvfs_dos_fileinfo dos;
};


/* open file handle state - encapsulates the posix fd

   Note that this is separated from the pvfs_file structure in order
   to cope with the openx DENY_DOS semantics where a 2nd DENY_DOS open
   on the same connection gets the same low level filesystem handle,
   rather than a new handle
*/
struct pvfs_file_handle {
	int fd;

	struct pvfs_filename *name;

	/* a unique file key to be used for open file locking */
	DATA_BLOB odb_locking_key;

	/* a unique file key to be used for byte range locking */
	DATA_BLOB brl_locking_key;

	uint32_t create_options;

	/* this is set by the mode_information level. What does it do? */
	uint32_t mode;

	/* yes, we need 2 independent positions ... */
	uint64_t seek_offset;
	uint64_t position;

	BOOL have_opendb_entry;

	/* we need this hook back to our parent for lock destruction */
	struct pvfs_state *pvfs;

	/* have we set a sticky write time that we should remove on close */
	BOOL sticky_write_time;
};

/* open file state */
struct pvfs_file {
	struct pvfs_file *next, *prev;
	struct pvfs_file_handle *handle;
	uint16_t fnum;

	struct pvfs_state *pvfs;

	uint32_t impersonation;
	uint32_t share_access;
	uint32_t access_mask;

	/* we need to remember the session it was opened on,
	   as it is illegal to operate on someone elses fnum */
	struct auth_session_info *session_info;

	/* we need to remember the client pid that 
	   opened the file so SMBexit works */
	uint16_t smbpid;

	/* 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;

	/* for directories, a buffer of pending notify events */
	struct pvfs_notify_buffer *notify_buffer;
};

/* the state of a search started with pvfs_search_first() */
struct pvfs_search_state {
	struct pvfs_search_state *prev, *next;
	struct pvfs_state *pvfs;
	uint16_t handle;
	uint_t current_index;
	uint16_t search_attrib;
	uint16_t must_attrib;
	struct pvfs_dir *dir;
	time_t last_used;
	uint_t num_ea_names;
	struct ea_name *ea_names;
	struct timed_event *te;
};

/* flags to pvfs_resolve_name() */
#define PVFS_RESOLVE_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)
#define PVFS_FLAG_XATTR_ENABLE   (1<<7)
#define PVFS_FLAG_FAKE_OPLOCKS   (1<<8)

/* forward declare some anonymous structures */
struct pvfs_dir;

/* types of notification for pvfs wait events */
enum pvfs_wait_notice {PVFS_WAIT_EVENT, PVFS_WAIT_TIMEOUT, PVFS_WAIT_CANCEL};

#include "ntvfs/posix/vfs_posix_proto.h"

#endif /* _VFS_POSIX_H_ */