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1da177e4 | 1 | /* |
7b718769 NS |
2 | * Copyright (c) 2000-2005 Silicon Graphics, Inc. |
3 | * All Rights Reserved. | |
1da177e4 | 4 | * |
7b718769 NS |
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 | |
1da177e4 LT |
7 | * published by the Free Software Foundation. |
8 | * | |
7b718769 NS |
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. | |
1da177e4 | 13 | * |
7b718769 NS |
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 | |
1da177e4 LT |
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 | #define DM_EVENT_ENABLED(vfsp, ip, event) ( \ | |
70 | unlikely ((vfsp)->vfs_flag & VFS_DMI) && \ | |
71 | ( ((ip)->i_d.di_dmevmask & (1 << event)) || \ | |
72 | ((ip)->i_mount->m_dmevmask & (1 << event)) ) \ | |
73 | ) | |
74 | ||
75 | #define DM_EVENT_ENABLED_IO(vfsp, io, event) ( \ | |
76 | unlikely ((vfsp)->vfs_flag & VFS_DMI) && \ | |
77 | ( ((io)->io_dmevmask & (1 << event)) || \ | |
78 | ((io)->io_mount->m_dmevmask & (1 << event)) ) \ | |
79 | ) | |
80 | ||
81 | #define DM_XFS_VALID_FS_EVENTS ( \ | |
82 | (1 << DM_EVENT_PREUNMOUNT) | \ | |
83 | (1 << DM_EVENT_UNMOUNT) | \ | |
84 | (1 << DM_EVENT_NOSPACE) | \ | |
85 | (1 << DM_EVENT_DEBUT) | \ | |
86 | (1 << DM_EVENT_CREATE) | \ | |
87 | (1 << DM_EVENT_POSTCREATE) | \ | |
88 | (1 << DM_EVENT_REMOVE) | \ | |
89 | (1 << DM_EVENT_POSTREMOVE) | \ | |
90 | (1 << DM_EVENT_RENAME) | \ | |
91 | (1 << DM_EVENT_POSTRENAME) | \ | |
92 | (1 << DM_EVENT_LINK) | \ | |
93 | (1 << DM_EVENT_POSTLINK) | \ | |
94 | (1 << DM_EVENT_SYMLINK) | \ | |
95 | (1 << DM_EVENT_POSTSYMLINK) | \ | |
96 | (1 << DM_EVENT_ATTRIBUTE) | \ | |
97 | (1 << DM_EVENT_DESTROY) ) | |
98 | ||
99 | /* Events valid in dm_set_eventlist() when called with a file handle for | |
100 | a regular file or a symlink. These events are persistent. | |
101 | */ | |
102 | ||
103 | #define DM_XFS_VALID_FILE_EVENTS ( \ | |
104 | (1 << DM_EVENT_ATTRIBUTE) | \ | |
105 | (1 << DM_EVENT_DESTROY) ) | |
106 | ||
107 | /* Events valid in dm_set_eventlist() when called with a file handle for | |
108 | a directory. These events are persistent. | |
109 | */ | |
110 | ||
111 | #define DM_XFS_VALID_DIRECTORY_EVENTS ( \ | |
112 | (1 << DM_EVENT_CREATE) | \ | |
113 | (1 << DM_EVENT_POSTCREATE) | \ | |
114 | (1 << DM_EVENT_REMOVE) | \ | |
115 | (1 << DM_EVENT_POSTREMOVE) | \ | |
116 | (1 << DM_EVENT_RENAME) | \ | |
117 | (1 << DM_EVENT_POSTRENAME) | \ | |
118 | (1 << DM_EVENT_LINK) | \ | |
119 | (1 << DM_EVENT_POSTLINK) | \ | |
120 | (1 << DM_EVENT_SYMLINK) | \ | |
121 | (1 << DM_EVENT_POSTSYMLINK) | \ | |
122 | (1 << DM_EVENT_ATTRIBUTE) | \ | |
123 | (1 << DM_EVENT_DESTROY) ) | |
124 | ||
125 | /* Events supported by the XFS filesystem. */ | |
126 | #define DM_XFS_SUPPORTED_EVENTS ( \ | |
127 | (1 << DM_EVENT_MOUNT) | \ | |
128 | (1 << DM_EVENT_PREUNMOUNT) | \ | |
129 | (1 << DM_EVENT_UNMOUNT) | \ | |
130 | (1 << DM_EVENT_NOSPACE) | \ | |
131 | (1 << DM_EVENT_CREATE) | \ | |
132 | (1 << DM_EVENT_POSTCREATE) | \ | |
133 | (1 << DM_EVENT_REMOVE) | \ | |
134 | (1 << DM_EVENT_POSTREMOVE) | \ | |
135 | (1 << DM_EVENT_RENAME) | \ | |
136 | (1 << DM_EVENT_POSTRENAME) | \ | |
137 | (1 << DM_EVENT_LINK) | \ | |
138 | (1 << DM_EVENT_POSTLINK) | \ | |
139 | (1 << DM_EVENT_SYMLINK) | \ | |
140 | (1 << DM_EVENT_POSTSYMLINK) | \ | |
141 | (1 << DM_EVENT_READ) | \ | |
142 | (1 << DM_EVENT_WRITE) | \ | |
143 | (1 << DM_EVENT_TRUNCATE) | \ | |
144 | (1 << DM_EVENT_ATTRIBUTE) | \ | |
145 | (1 << DM_EVENT_DESTROY) ) | |
146 | ||
147 | ||
148 | /* | |
149 | * Definitions used for the flags field on dm_send_*_event(). | |
150 | */ | |
151 | ||
152 | #define DM_FLAGS_NDELAY 0x001 /* return EAGAIN after dm_pending() */ | |
153 | #define DM_FLAGS_UNWANTED 0x002 /* event not in fsys dm_eventset_t */ | |
154 | #define DM_FLAGS_ISEM 0x004 /* thread holds i_sem */ | |
1da177e4 LT |
155 | #define DM_FLAGS_IALLOCSEM_RD 0x010 /* thread holds i_alloc_sem rd */ |
156 | #define DM_FLAGS_IALLOCSEM_WR 0x020 /* thread holds i_alloc_sem wr */ | |
1da177e4 LT |
157 | |
158 | /* | |
159 | * Based on IO_ISDIRECT, decide which i_ flag is set. | |
160 | */ | |
e1a40fa9 DR |
161 | #if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,0) |
162 | #define DM_SEM_FLAG_RD(ioflags) (((ioflags) & IO_ISDIRECT) ? \ | |
163 | DM_FLAGS_ISEM : 0) | |
164 | #define DM_SEM_FLAG_WR (DM_FLAGS_IALLOCSEM_WR | DM_FLAGS_ISEM) | |
165 | #endif | |
166 | ||
167 | #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0)) && \ | |
168 | (LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,22)) | |
1da177e4 LT |
169 | #define DM_SEM_FLAG_RD(ioflags) (((ioflags) & IO_ISDIRECT) ? \ |
170 | DM_FLAGS_IALLOCSEM_RD : DM_FLAGS_ISEM) | |
171 | #define DM_SEM_FLAG_WR (DM_FLAGS_IALLOCSEM_WR | DM_FLAGS_ISEM) | |
e1a40fa9 DR |
172 | #endif |
173 | ||
174 | #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,4,21) | |
1da177e4 LT |
175 | #define DM_SEM_FLAG_RD(ioflags) (((ioflags) & IO_ISDIRECT) ? \ |
176 | 0 : DM_FLAGS_ISEM) | |
177 | #define DM_SEM_FLAG_WR (DM_FLAGS_ISEM) | |
178 | #endif | |
179 | ||
e1a40fa9 | 180 | |
1da177e4 LT |
181 | /* |
182 | * Macros to turn caller specified delay/block flags into | |
183 | * dm_send_xxxx_event flag DM_FLAGS_NDELAY. | |
184 | */ | |
185 | ||
186 | #define FILP_DELAY_FLAG(filp) ((filp->f_flags&(O_NDELAY|O_NONBLOCK)) ? \ | |
187 | DM_FLAGS_NDELAY : 0) | |
188 | #define AT_DELAY_FLAG(f) ((f&ATTR_NONBLOCK) ? DM_FLAGS_NDELAY : 0) | |
189 | ||
190 | ||
191 | extern struct bhv_vfsops xfs_dmops; | |
192 | ||
193 | #ifdef CONFIG_XFS_DMAPI | |
194 | void xfs_dm_init(struct file_system_type *); | |
195 | void xfs_dm_exit(struct file_system_type *); | |
196 | #define XFS_DM_INIT(fstype) xfs_dm_init(fstype) | |
197 | #define XFS_DM_EXIT(fstype) xfs_dm_exit(fstype) | |
198 | #else | |
199 | #define XFS_DM_INIT(fstype) | |
200 | #define XFS_DM_EXIT(fstype) | |
201 | #endif | |
202 | ||
203 | #endif /* __XFS_DMAPI_H__ */ |