1 /*
2 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18 #ifndef __XFS_DMAPI_H__
19 #define __XFS_DMAPI_H__
20
21 /* Values used to define the on-disk version of dm_attrname_t. All
22 * on-disk attribute names start with the 8-byte string "SGI_DMI_".
23 *
24 * In the on-disk inode, DMAPI attribute names consist of the user-provided
25 * name with the DMATTR_PREFIXSTRING pre-pended. This string must NEVER be
26 * changed.
27 */
28
29 #define DMATTR_PREFIXLEN 8
30 #define DMATTR_PREFIXSTRING "SGI_DMI_"
31
32 typedef enum {
33 DM_EVENT_INVALID = -1,
34 DM_EVENT_CANCEL = 0, /* not supported */
35 DM_EVENT_MOUNT = 1,
36 DM_EVENT_PREUNMOUNT = 2,
37 DM_EVENT_UNMOUNT = 3,
38 DM_EVENT_DEBUT = 4, /* not supported */
39 DM_EVENT_CREATE = 5,
40 DM_EVENT_CLOSE = 6, /* not supported */
41 DM_EVENT_POSTCREATE = 7,
42 DM_EVENT_REMOVE = 8,
43 DM_EVENT_POSTREMOVE = 9,
44 DM_EVENT_RENAME = 10,
45 DM_EVENT_POSTRENAME = 11,
46 DM_EVENT_LINK = 12,
47 DM_EVENT_POSTLINK = 13,
48 DM_EVENT_SYMLINK = 14,
49 DM_EVENT_POSTSYMLINK = 15,
50 DM_EVENT_READ = 16,
51 DM_EVENT_WRITE = 17,
52 DM_EVENT_TRUNCATE = 18,
53 DM_EVENT_ATTRIBUTE = 19,
54 DM_EVENT_DESTROY = 20,
55 DM_EVENT_NOSPACE = 21,
56 DM_EVENT_USER = 22,
57 DM_EVENT_MAX = 23
58 } dm_eventtype_t;
59 #define HAVE_DM_EVENTTYPE_T
60
61 typedef enum {
62 DM_RIGHT_NULL,
63 DM_RIGHT_SHARED,
64 DM_RIGHT_EXCL
65 } dm_right_t;
66 #define HAVE_DM_RIGHT_T
67
68 /* Defines for determining if an event message should be sent. */
69 #ifdef HAVE_DMAPI
70 #define DM_EVENT_ENABLED(ip, event) ( \
71 unlikely ((ip)->i_mount->m_flags & XFS_MOUNT_DMAPI) && \
72 ( ((ip)->i_d.di_dmevmask & (1 << event)) || \
73 ((ip)->i_mount->m_dmevmask & (1 << event)) ) \
74 )
75 #else
76 #define DM_EVENT_ENABLED(ip, event) (0)
77 #endif
78
79 #define DM_XFS_VALID_FS_EVENTS ( \
80 (1 << DM_EVENT_PREUNMOUNT) | \
81 (1 << DM_EVENT_UNMOUNT) | \
82 (1 << DM_EVENT_NOSPACE) | \
83 (1 << DM_EVENT_DEBUT) | \
84 (1 << DM_EVENT_CREATE) | \
85 (1 << DM_EVENT_POSTCREATE) | \
86 (1 << DM_EVENT_REMOVE) | \
87 (1 << DM_EVENT_POSTREMOVE) | \
88 (1 << DM_EVENT_RENAME) | \
89 (1 << DM_EVENT_POSTRENAME) | \
90 (1 << DM_EVENT_LINK) | \
91 (1 << DM_EVENT_POSTLINK) | \
92 (1 << DM_EVENT_SYMLINK) | \
93 (1 << DM_EVENT_POSTSYMLINK) | \
94 (1 << DM_EVENT_ATTRIBUTE) | \
95 (1 << DM_EVENT_DESTROY) )
96
97 /* Events valid in dm_set_eventlist() when called with a file handle for
98 a regular file or a symlink. These events are persistent.
99 */
100
101 #define DM_XFS_VALID_FILE_EVENTS ( \
102 (1 << DM_EVENT_ATTRIBUTE) | \
103 (1 << DM_EVENT_DESTROY) )
104
105 /* Events valid in dm_set_eventlist() when called with a file handle for
106 a directory. These events are persistent.
107 */
108
109 #define DM_XFS_VALID_DIRECTORY_EVENTS ( \
110 (1 << DM_EVENT_CREATE) | \
111 (1 << DM_EVENT_POSTCREATE) | \
112 (1 << DM_EVENT_REMOVE) | \
113 (1 << DM_EVENT_POSTREMOVE) | \
114 (1 << DM_EVENT_RENAME) | \
115 (1 << DM_EVENT_POSTRENAME) | \
116 (1 << DM_EVENT_LINK) | \
117 (1 << DM_EVENT_POSTLINK) | \
118 (1 << DM_EVENT_SYMLINK) | \
119 (1 << DM_EVENT_POSTSYMLINK) | \
120 (1 << DM_EVENT_ATTRIBUTE) | \
121 (1 << DM_EVENT_DESTROY) )
122
123 /* Events supported by the XFS filesystem. */
124 #define DM_XFS_SUPPORTED_EVENTS ( \
125 (1 << DM_EVENT_MOUNT) | \
126 (1 << DM_EVENT_PREUNMOUNT) | \
127 (1 << DM_EVENT_UNMOUNT) | \
128 (1 << DM_EVENT_NOSPACE) | \
129 (1 << DM_EVENT_CREATE) | \
130 (1 << DM_EVENT_POSTCREATE) | \
131 (1 << DM_EVENT_REMOVE) | \
132 (1 << DM_EVENT_POSTREMOVE) | \
133 (1 << DM_EVENT_RENAME) | \
134 (1 << DM_EVENT_POSTRENAME) | \
135 (1 << DM_EVENT_LINK) | \
136 (1 << DM_EVENT_POSTLINK) | \
137 (1 << DM_EVENT_SYMLINK) | \
138 (1 << DM_EVENT_POSTSYMLINK) | \
139 (1 << DM_EVENT_READ) | \
140 (1 << DM_EVENT_WRITE) | \
141 (1 << DM_EVENT_TRUNCATE) | \
142 (1 << DM_EVENT_ATTRIBUTE) | \
143 (1 << DM_EVENT_DESTROY) )
144
145
146 /*
147 * Definitions used for the flags field on dm_send_*_event().
148 */
149
150 #define DM_FLAGS_NDELAY 0x001 /* return EAGAIN after dm_pending() */
151 #define DM_FLAGS_UNWANTED 0x002 /* event not in fsys dm_eventset_t */
152 #define DM_FLAGS_IMUX 0x004 /* thread holds i_mutex */
153 #define DM_FLAGS_IALLOCSEM_RD 0x010 /* thread holds i_alloc_sem rd */
154 #define DM_FLAGS_IALLOCSEM_WR 0x020 /* thread holds i_alloc_sem wr */
155
156 /*
157 * Pull in platform specific event flags defines
158 */
159 #include "xfs_dmapi_priv.h"
160
161 /*
162 * Macros to turn caller specified delay/block flags into
163 * dm_send_xxxx_event flag DM_FLAGS_NDELAY.
164 */
165
166 #define FILP_DELAY_FLAG(filp) ((filp->f_flags&(O_NDELAY|O_NONBLOCK)) ? \
167 DM_FLAGS_NDELAY : 0)
168 #define AT_DELAY_FLAG(f) ((f & XFS_ATTR_NONBLOCK) ? DM_FLAGS_NDELAY : 0)
169
170 #endif /* __XFS_DMAPI_H__ */
171
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