forked from analogdevicesinc/linux
-
Notifications
You must be signed in to change notification settings - Fork 3
/
xfs_dmapi.h
176 lines (155 loc) · 5.12 KB
/
xfs_dmapi.h
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
/*
* Copyright (c) 2000-2005 Silicon Graphics, Inc.
* All Rights Reserved.
*
* 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.
*
* This program is distributed in the hope that it would 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 the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef __XFS_DMAPI_H__
#define __XFS_DMAPI_H__
#include <linux/version.h>
/* Values used to define the on-disk version of dm_attrname_t. All
* on-disk attribute names start with the 8-byte string "SGI_DMI_".
*
* In the on-disk inode, DMAPI attribute names consist of the user-provided
* name with the DMATTR_PREFIXSTRING pre-pended. This string must NEVER be
* changed.
*/
#define DMATTR_PREFIXLEN 8
#define DMATTR_PREFIXSTRING "SGI_DMI_"
typedef enum {
DM_EVENT_INVALID = -1,
DM_EVENT_CANCEL = 0, /* not supported */
DM_EVENT_MOUNT = 1,
DM_EVENT_PREUNMOUNT = 2,
DM_EVENT_UNMOUNT = 3,
DM_EVENT_DEBUT = 4, /* not supported */
DM_EVENT_CREATE = 5,
DM_EVENT_CLOSE = 6, /* not supported */
DM_EVENT_POSTCREATE = 7,
DM_EVENT_REMOVE = 8,
DM_EVENT_POSTREMOVE = 9,
DM_EVENT_RENAME = 10,
DM_EVENT_POSTRENAME = 11,
DM_EVENT_LINK = 12,
DM_EVENT_POSTLINK = 13,
DM_EVENT_SYMLINK = 14,
DM_EVENT_POSTSYMLINK = 15,
DM_EVENT_READ = 16,
DM_EVENT_WRITE = 17,
DM_EVENT_TRUNCATE = 18,
DM_EVENT_ATTRIBUTE = 19,
DM_EVENT_DESTROY = 20,
DM_EVENT_NOSPACE = 21,
DM_EVENT_USER = 22,
DM_EVENT_MAX = 23
} dm_eventtype_t;
#define HAVE_DM_EVENTTYPE_T
typedef enum {
DM_RIGHT_NULL,
DM_RIGHT_SHARED,
DM_RIGHT_EXCL
} dm_right_t;
#define HAVE_DM_RIGHT_T
/* Defines for determining if an event message should be sent. */
#define DM_EVENT_ENABLED(vfsp, ip, event) ( \
unlikely ((vfsp)->vfs_flag & VFS_DMI) && \
( ((ip)->i_d.di_dmevmask & (1 << event)) || \
((ip)->i_mount->m_dmevmask & (1 << event)) ) \
)
#define DM_EVENT_ENABLED_IO(vfsp, io, event) ( \
unlikely ((vfsp)->vfs_flag & VFS_DMI) && \
( ((io)->io_dmevmask & (1 << event)) || \
((io)->io_mount->m_dmevmask & (1 << event)) ) \
)
#define DM_XFS_VALID_FS_EVENTS ( \
(1 << DM_EVENT_PREUNMOUNT) | \
(1 << DM_EVENT_UNMOUNT) | \
(1 << DM_EVENT_NOSPACE) | \
(1 << DM_EVENT_DEBUT) | \
(1 << DM_EVENT_CREATE) | \
(1 << DM_EVENT_POSTCREATE) | \
(1 << DM_EVENT_REMOVE) | \
(1 << DM_EVENT_POSTREMOVE) | \
(1 << DM_EVENT_RENAME) | \
(1 << DM_EVENT_POSTRENAME) | \
(1 << DM_EVENT_LINK) | \
(1 << DM_EVENT_POSTLINK) | \
(1 << DM_EVENT_SYMLINK) | \
(1 << DM_EVENT_POSTSYMLINK) | \
(1 << DM_EVENT_ATTRIBUTE) | \
(1 << DM_EVENT_DESTROY) )
/* Events valid in dm_set_eventlist() when called with a file handle for
a regular file or a symlink. These events are persistent.
*/
#define DM_XFS_VALID_FILE_EVENTS ( \
(1 << DM_EVENT_ATTRIBUTE) | \
(1 << DM_EVENT_DESTROY) )
/* Events valid in dm_set_eventlist() when called with a file handle for
a directory. These events are persistent.
*/
#define DM_XFS_VALID_DIRECTORY_EVENTS ( \
(1 << DM_EVENT_CREATE) | \
(1 << DM_EVENT_POSTCREATE) | \
(1 << DM_EVENT_REMOVE) | \
(1 << DM_EVENT_POSTREMOVE) | \
(1 << DM_EVENT_RENAME) | \
(1 << DM_EVENT_POSTRENAME) | \
(1 << DM_EVENT_LINK) | \
(1 << DM_EVENT_POSTLINK) | \
(1 << DM_EVENT_SYMLINK) | \
(1 << DM_EVENT_POSTSYMLINK) | \
(1 << DM_EVENT_ATTRIBUTE) | \
(1 << DM_EVENT_DESTROY) )
/* Events supported by the XFS filesystem. */
#define DM_XFS_SUPPORTED_EVENTS ( \
(1 << DM_EVENT_MOUNT) | \
(1 << DM_EVENT_PREUNMOUNT) | \
(1 << DM_EVENT_UNMOUNT) | \
(1 << DM_EVENT_NOSPACE) | \
(1 << DM_EVENT_CREATE) | \
(1 << DM_EVENT_POSTCREATE) | \
(1 << DM_EVENT_REMOVE) | \
(1 << DM_EVENT_POSTREMOVE) | \
(1 << DM_EVENT_RENAME) | \
(1 << DM_EVENT_POSTRENAME) | \
(1 << DM_EVENT_LINK) | \
(1 << DM_EVENT_POSTLINK) | \
(1 << DM_EVENT_SYMLINK) | \
(1 << DM_EVENT_POSTSYMLINK) | \
(1 << DM_EVENT_READ) | \
(1 << DM_EVENT_WRITE) | \
(1 << DM_EVENT_TRUNCATE) | \
(1 << DM_EVENT_ATTRIBUTE) | \
(1 << DM_EVENT_DESTROY) )
/*
* Definitions used for the flags field on dm_send_*_event().
*/
#define DM_FLAGS_NDELAY 0x001 /* return EAGAIN after dm_pending() */
#define DM_FLAGS_UNWANTED 0x002 /* event not in fsys dm_eventset_t */
#define DM_FLAGS_IMUX 0x004 /* thread holds i_mutex */
#define DM_FLAGS_IALLOCSEM_RD 0x010 /* thread holds i_alloc_sem rd */
#define DM_FLAGS_IALLOCSEM_WR 0x020 /* thread holds i_alloc_sem wr */
/*
* Pull in platform specific event flags defines
*/
#include "xfs_dmapi_priv.h"
/*
* Macros to turn caller specified delay/block flags into
* dm_send_xxxx_event flag DM_FLAGS_NDELAY.
*/
#define FILP_DELAY_FLAG(filp) ((filp->f_flags&(O_NDELAY|O_NONBLOCK)) ? \
DM_FLAGS_NDELAY : 0)
#define AT_DELAY_FLAG(f) ((f&ATTR_NONBLOCK) ? DM_FLAGS_NDELAY : 0)
extern struct bhv_module_vfsops xfs_dmops;
#endif /* __XFS_DMAPI_H__ */