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1da177e4 LT |
1 | /* |
2 | * Copyright (c) 2000-2004 Silicon Graphics, Inc. All Rights Reserved. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms of version 2 of the GNU General Public License as | |
6 | * published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it would be useful, but | |
9 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. | |
11 | * | |
12 | * Further, this software is distributed without any warranty that it is | |
13 | * free of the rightful claim of any third person regarding infringement | |
14 | * or the like. Any license provided herein, whether implied or | |
15 | * otherwise, applies only to this software file. Patent licenses, if | |
16 | * any, provided herein do not apply to combinations of this program with | |
17 | * other software, or any other product whatsoever. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License along | |
20 | * with this program; if not, write the Free Software Foundation, Inc., 59 | |
21 | * Temple Place - Suite 330, Boston MA 02111-1307, USA. | |
22 | * | |
23 | * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy, | |
24 | * Mountain View, CA 94043, or: | |
25 | * | |
26 | * http://www.sgi.com | |
27 | * | |
28 | * For further information regarding this notice, see: | |
29 | * | |
30 | * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/ | |
31 | */ | |
32 | #ifndef __XFS_DMAPI_H__ | |
33 | #define __XFS_DMAPI_H__ | |
34 | ||
35 | /* Values used to define the on-disk version of dm_attrname_t. All | |
36 | * on-disk attribute names start with the 8-byte string "SGI_DMI_". | |
37 | * | |
38 | * In the on-disk inode, DMAPI attribute names consist of the user-provided | |
39 | * name with the DMATTR_PREFIXSTRING pre-pended. This string must NEVER be | |
40 | * changed. | |
41 | */ | |
42 | ||
43 | #define DMATTR_PREFIXLEN 8 | |
44 | #define DMATTR_PREFIXSTRING "SGI_DMI_" | |
45 | ||
46 | typedef enum { | |
47 | DM_EVENT_INVALID = -1, | |
48 | DM_EVENT_CANCEL = 0, /* not supported */ | |
49 | DM_EVENT_MOUNT = 1, | |
50 | DM_EVENT_PREUNMOUNT = 2, | |
51 | DM_EVENT_UNMOUNT = 3, | |
52 | DM_EVENT_DEBUT = 4, /* not supported */ | |
53 | DM_EVENT_CREATE = 5, | |
54 | DM_EVENT_CLOSE = 6, /* not supported */ | |
55 | DM_EVENT_POSTCREATE = 7, | |
56 | DM_EVENT_REMOVE = 8, | |
57 | DM_EVENT_POSTREMOVE = 9, | |
58 | DM_EVENT_RENAME = 10, | |
59 | DM_EVENT_POSTRENAME = 11, | |
60 | DM_EVENT_LINK = 12, | |
61 | DM_EVENT_POSTLINK = 13, | |
62 | DM_EVENT_SYMLINK = 14, | |
63 | DM_EVENT_POSTSYMLINK = 15, | |
64 | DM_EVENT_READ = 16, | |
65 | DM_EVENT_WRITE = 17, | |
66 | DM_EVENT_TRUNCATE = 18, | |
67 | DM_EVENT_ATTRIBUTE = 19, | |
68 | DM_EVENT_DESTROY = 20, | |
69 | DM_EVENT_NOSPACE = 21, | |
70 | DM_EVENT_USER = 22, | |
71 | DM_EVENT_MAX = 23 | |
72 | } dm_eventtype_t; | |
73 | #define HAVE_DM_EVENTTYPE_T | |
74 | ||
75 | typedef enum { | |
76 | DM_RIGHT_NULL, | |
77 | DM_RIGHT_SHARED, | |
78 | DM_RIGHT_EXCL | |
79 | } dm_right_t; | |
80 | #define HAVE_DM_RIGHT_T | |
81 | ||
82 | /* Defines for determining if an event message should be sent. */ | |
83 | #define DM_EVENT_ENABLED(vfsp, ip, event) ( \ | |
84 | unlikely ((vfsp)->vfs_flag & VFS_DMI) && \ | |
85 | ( ((ip)->i_d.di_dmevmask & (1 << event)) || \ | |
86 | ((ip)->i_mount->m_dmevmask & (1 << event)) ) \ | |
87 | ) | |
88 | ||
89 | #define DM_EVENT_ENABLED_IO(vfsp, io, event) ( \ | |
90 | unlikely ((vfsp)->vfs_flag & VFS_DMI) && \ | |
91 | ( ((io)->io_dmevmask & (1 << event)) || \ | |
92 | ((io)->io_mount->m_dmevmask & (1 << event)) ) \ | |
93 | ) | |
94 | ||
95 | #define DM_XFS_VALID_FS_EVENTS ( \ | |
96 | (1 << DM_EVENT_PREUNMOUNT) | \ | |
97 | (1 << DM_EVENT_UNMOUNT) | \ | |
98 | (1 << DM_EVENT_NOSPACE) | \ | |
99 | (1 << DM_EVENT_DEBUT) | \ | |
100 | (1 << DM_EVENT_CREATE) | \ | |
101 | (1 << DM_EVENT_POSTCREATE) | \ | |
102 | (1 << DM_EVENT_REMOVE) | \ | |
103 | (1 << DM_EVENT_POSTREMOVE) | \ | |
104 | (1 << DM_EVENT_RENAME) | \ | |
105 | (1 << DM_EVENT_POSTRENAME) | \ | |
106 | (1 << DM_EVENT_LINK) | \ | |
107 | (1 << DM_EVENT_POSTLINK) | \ | |
108 | (1 << DM_EVENT_SYMLINK) | \ | |
109 | (1 << DM_EVENT_POSTSYMLINK) | \ | |
110 | (1 << DM_EVENT_ATTRIBUTE) | \ | |
111 | (1 << DM_EVENT_DESTROY) ) | |
112 | ||
113 | /* Events valid in dm_set_eventlist() when called with a file handle for | |
114 | a regular file or a symlink. These events are persistent. | |
115 | */ | |
116 | ||
117 | #define DM_XFS_VALID_FILE_EVENTS ( \ | |
118 | (1 << DM_EVENT_ATTRIBUTE) | \ | |
119 | (1 << DM_EVENT_DESTROY) ) | |
120 | ||
121 | /* Events valid in dm_set_eventlist() when called with a file handle for | |
122 | a directory. These events are persistent. | |
123 | */ | |
124 | ||
125 | #define DM_XFS_VALID_DIRECTORY_EVENTS ( \ | |
126 | (1 << DM_EVENT_CREATE) | \ | |
127 | (1 << DM_EVENT_POSTCREATE) | \ | |
128 | (1 << DM_EVENT_REMOVE) | \ | |
129 | (1 << DM_EVENT_POSTREMOVE) | \ | |
130 | (1 << DM_EVENT_RENAME) | \ | |
131 | (1 << DM_EVENT_POSTRENAME) | \ | |
132 | (1 << DM_EVENT_LINK) | \ | |
133 | (1 << DM_EVENT_POSTLINK) | \ | |
134 | (1 << DM_EVENT_SYMLINK) | \ | |
135 | (1 << DM_EVENT_POSTSYMLINK) | \ | |
136 | (1 << DM_EVENT_ATTRIBUTE) | \ | |
137 | (1 << DM_EVENT_DESTROY) ) | |
138 | ||
139 | /* Events supported by the XFS filesystem. */ | |
140 | #define DM_XFS_SUPPORTED_EVENTS ( \ | |
141 | (1 << DM_EVENT_MOUNT) | \ | |
142 | (1 << DM_EVENT_PREUNMOUNT) | \ | |
143 | (1 << DM_EVENT_UNMOUNT) | \ | |
144 | (1 << DM_EVENT_NOSPACE) | \ | |
145 | (1 << DM_EVENT_CREATE) | \ | |
146 | (1 << DM_EVENT_POSTCREATE) | \ | |
147 | (1 << DM_EVENT_REMOVE) | \ | |
148 | (1 << DM_EVENT_POSTREMOVE) | \ | |
149 | (1 << DM_EVENT_RENAME) | \ | |
150 | (1 << DM_EVENT_POSTRENAME) | \ | |
151 | (1 << DM_EVENT_LINK) | \ | |
152 | (1 << DM_EVENT_POSTLINK) | \ | |
153 | (1 << DM_EVENT_SYMLINK) | \ | |
154 | (1 << DM_EVENT_POSTSYMLINK) | \ | |
155 | (1 << DM_EVENT_READ) | \ | |
156 | (1 << DM_EVENT_WRITE) | \ | |
157 | (1 << DM_EVENT_TRUNCATE) | \ | |
158 | (1 << DM_EVENT_ATTRIBUTE) | \ | |
159 | (1 << DM_EVENT_DESTROY) ) | |
160 | ||
161 | ||
162 | /* | |
163 | * Definitions used for the flags field on dm_send_*_event(). | |
164 | */ | |
165 | ||
166 | #define DM_FLAGS_NDELAY 0x001 /* return EAGAIN after dm_pending() */ | |
167 | #define DM_FLAGS_UNWANTED 0x002 /* event not in fsys dm_eventset_t */ | |
168 | #define DM_FLAGS_ISEM 0x004 /* thread holds i_sem */ | |
169 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0) | |
170 | #if LINUX_VERSION_CODE > KERNEL_VERSION(2,4,21) | |
171 | /* i_alloc_sem was added in 2.4.22-pre1 */ | |
172 | #define DM_FLAGS_IALLOCSEM_RD 0x010 /* thread holds i_alloc_sem rd */ | |
173 | #define DM_FLAGS_IALLOCSEM_WR 0x020 /* thread holds i_alloc_sem wr */ | |
174 | #endif | |
175 | #endif | |
176 | ||
177 | /* | |
178 | * Based on IO_ISDIRECT, decide which i_ flag is set. | |
179 | */ | |
180 | #ifdef DM_FLAGS_IALLOCSEM_RD | |
181 | #define DM_SEM_FLAG_RD(ioflags) (((ioflags) & IO_ISDIRECT) ? \ | |
182 | DM_FLAGS_IALLOCSEM_RD : DM_FLAGS_ISEM) | |
183 | #define DM_SEM_FLAG_WR (DM_FLAGS_IALLOCSEM_WR | DM_FLAGS_ISEM) | |
184 | #else | |
185 | #define DM_SEM_FLAG_RD(ioflags) (((ioflags) & IO_ISDIRECT) ? \ | |
186 | 0 : DM_FLAGS_ISEM) | |
187 | #define DM_SEM_FLAG_WR (DM_FLAGS_ISEM) | |
188 | #endif | |
189 | ||
190 | /* | |
191 | * Macros to turn caller specified delay/block flags into | |
192 | * dm_send_xxxx_event flag DM_FLAGS_NDELAY. | |
193 | */ | |
194 | ||
195 | #define FILP_DELAY_FLAG(filp) ((filp->f_flags&(O_NDELAY|O_NONBLOCK)) ? \ | |
196 | DM_FLAGS_NDELAY : 0) | |
197 | #define AT_DELAY_FLAG(f) ((f&ATTR_NONBLOCK) ? DM_FLAGS_NDELAY : 0) | |
198 | ||
199 | ||
200 | extern struct bhv_vfsops xfs_dmops; | |
201 | ||
202 | #ifdef CONFIG_XFS_DMAPI | |
203 | void xfs_dm_init(struct file_system_type *); | |
204 | void xfs_dm_exit(struct file_system_type *); | |
205 | #define XFS_DM_INIT(fstype) xfs_dm_init(fstype) | |
206 | #define XFS_DM_EXIT(fstype) xfs_dm_exit(fstype) | |
207 | #else | |
208 | #define XFS_DM_INIT(fstype) | |
209 | #define XFS_DM_EXIT(fstype) | |
210 | #endif | |
211 | ||
6fac0cb4 DR |
212 | #define HAVE_XFS_DM_MM |
213 | int xfs_dm_mm_get(struct vm_area_struct *vma); | |
214 | void xfs_dm_mm_put(struct vm_area_struct *vma); | |
215 | ||
1da177e4 | 216 | #endif /* __XFS_DMAPI_H__ */ |