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1 | #ifndef _LINUX_FS_NOTIFY_H |
2 | #define _LINUX_FS_NOTIFY_H | |
3 | ||
4 | /* | |
5 | * include/linux/fsnotify.h - generic hooks for filesystem notification, to | |
6 | * reduce in-source duplication from both dnotify and inotify. | |
7 | * | |
8 | * We don't compile any of this away in some complicated menagerie of ifdefs. | |
9 | * Instead, we rely on the code inside to optimize away as needed. | |
10 | * | |
11 | * (C) Copyright 2005 Robert Love | |
12 | */ | |
13 | ||
14 | #ifdef __KERNEL__ | |
15 | ||
16 | #include <linux/dnotify.h> | |
17 | #include <linux/inotify.h> | |
73241ccc | 18 | #include <linux/audit.h> |
0eeca283 | 19 | |
c32ccd87 NP |
20 | /* |
21 | * fsnotify_d_instantiate - instantiate a dentry for inode | |
22 | * Called with dcache_lock held. | |
23 | */ | |
24 | static inline void fsnotify_d_instantiate(struct dentry *entry, | |
25 | struct inode *inode) | |
26 | { | |
27 | inotify_d_instantiate(entry, inode); | |
28 | } | |
29 | ||
30 | /* | |
31 | * fsnotify_d_move - entry has been moved | |
32 | * Called with dcache_lock and entry->d_lock held. | |
33 | */ | |
34 | static inline void fsnotify_d_move(struct dentry *entry) | |
35 | { | |
36 | inotify_d_move(entry); | |
37 | } | |
38 | ||
0eeca283 RL |
39 | /* |
40 | * fsnotify_move - file old_name at old_dir was moved to new_name at new_dir | |
41 | */ | |
42 | static inline void fsnotify_move(struct inode *old_dir, struct inode *new_dir, | |
43 | const char *old_name, const char *new_name, | |
5a190ae6 | 44 | int isdir, struct inode *target, struct dentry *moved) |
0eeca283 | 45 | { |
5a190ae6 | 46 | struct inode *source = moved->d_inode; |
0eeca283 RL |
47 | u32 cookie = inotify_get_cookie(); |
48 | ||
49 | if (old_dir == new_dir) | |
50 | inode_dir_notify(old_dir, DN_RENAME); | |
51 | else { | |
52 | inode_dir_notify(old_dir, DN_DELETE); | |
53 | inode_dir_notify(new_dir, DN_CREATE); | |
54 | } | |
55 | ||
56 | if (isdir) | |
57 | isdir = IN_ISDIR; | |
7c297722 AG |
58 | inotify_inode_queue_event(old_dir, IN_MOVED_FROM|isdir,cookie,old_name, |
59 | source); | |
60 | inotify_inode_queue_event(new_dir, IN_MOVED_TO|isdir, cookie, new_name, | |
61 | source); | |
75449536 JM |
62 | |
63 | if (target) { | |
7c297722 | 64 | inotify_inode_queue_event(target, IN_DELETE_SELF, 0, NULL, NULL); |
75449536 JM |
65 | inotify_inode_is_dead(target); |
66 | } | |
89204c40 JM |
67 | |
68 | if (source) { | |
7c297722 | 69 | inotify_inode_queue_event(source, IN_MOVE_SELF, 0, NULL, NULL); |
89204c40 | 70 | } |
5a190ae6 | 71 | audit_inode_child(new_name, moved, new_dir); |
0eeca283 RL |
72 | } |
73 | ||
7a91bf7f JM |
74 | /* |
75 | * fsnotify_nameremove - a filename was removed from a directory | |
76 | */ | |
77 | static inline void fsnotify_nameremove(struct dentry *dentry, int isdir) | |
78 | { | |
79 | if (isdir) | |
80 | isdir = IN_ISDIR; | |
81 | dnotify_parent(dentry, DN_DELETE); | |
82 | inotify_dentry_parent_queue_event(dentry, IN_DELETE|isdir, 0, dentry->d_name.name); | |
83 | } | |
84 | ||
85 | /* | |
86 | * fsnotify_inoderemove - an inode is going away | |
87 | */ | |
88 | static inline void fsnotify_inoderemove(struct inode *inode) | |
89 | { | |
7c297722 | 90 | inotify_inode_queue_event(inode, IN_DELETE_SELF, 0, NULL, NULL); |
7a91bf7f JM |
91 | inotify_inode_is_dead(inode); |
92 | } | |
93 | ||
0eeca283 RL |
94 | /* |
95 | * fsnotify_create - 'name' was linked in | |
96 | */ | |
f38aa942 | 97 | static inline void fsnotify_create(struct inode *inode, struct dentry *dentry) |
0eeca283 RL |
98 | { |
99 | inode_dir_notify(inode, DN_CREATE); | |
7c297722 AG |
100 | inotify_inode_queue_event(inode, IN_CREATE, 0, dentry->d_name.name, |
101 | dentry->d_inode); | |
5a190ae6 | 102 | audit_inode_child(dentry->d_name.name, dentry, inode); |
0eeca283 RL |
103 | } |
104 | ||
105 | /* | |
106 | * fsnotify_mkdir - directory 'name' was created | |
107 | */ | |
f38aa942 | 108 | static inline void fsnotify_mkdir(struct inode *inode, struct dentry *dentry) |
0eeca283 RL |
109 | { |
110 | inode_dir_notify(inode, DN_CREATE); | |
f38aa942 | 111 | inotify_inode_queue_event(inode, IN_CREATE | IN_ISDIR, 0, |
7c297722 | 112 | dentry->d_name.name, dentry->d_inode); |
5a190ae6 | 113 | audit_inode_child(dentry->d_name.name, dentry, inode); |
0eeca283 RL |
114 | } |
115 | ||
116 | /* | |
117 | * fsnotify_access - file was read | |
118 | */ | |
119 | static inline void fsnotify_access(struct dentry *dentry) | |
120 | { | |
121 | struct inode *inode = dentry->d_inode; | |
122 | u32 mask = IN_ACCESS; | |
123 | ||
124 | if (S_ISDIR(inode->i_mode)) | |
125 | mask |= IN_ISDIR; | |
126 | ||
127 | dnotify_parent(dentry, DN_ACCESS); | |
128 | inotify_dentry_parent_queue_event(dentry, mask, 0, dentry->d_name.name); | |
7c297722 | 129 | inotify_inode_queue_event(inode, mask, 0, NULL, NULL); |
0eeca283 RL |
130 | } |
131 | ||
132 | /* | |
133 | * fsnotify_modify - file was modified | |
134 | */ | |
135 | static inline void fsnotify_modify(struct dentry *dentry) | |
136 | { | |
137 | struct inode *inode = dentry->d_inode; | |
138 | u32 mask = IN_MODIFY; | |
139 | ||
140 | if (S_ISDIR(inode->i_mode)) | |
141 | mask |= IN_ISDIR; | |
142 | ||
143 | dnotify_parent(dentry, DN_MODIFY); | |
144 | inotify_dentry_parent_queue_event(dentry, mask, 0, dentry->d_name.name); | |
7c297722 | 145 | inotify_inode_queue_event(inode, mask, 0, NULL, NULL); |
0eeca283 RL |
146 | } |
147 | ||
148 | /* | |
149 | * fsnotify_open - file was opened | |
150 | */ | |
151 | static inline void fsnotify_open(struct dentry *dentry) | |
152 | { | |
153 | struct inode *inode = dentry->d_inode; | |
154 | u32 mask = IN_OPEN; | |
155 | ||
156 | if (S_ISDIR(inode->i_mode)) | |
157 | mask |= IN_ISDIR; | |
158 | ||
0eeca283 | 159 | inotify_dentry_parent_queue_event(dentry, mask, 0, dentry->d_name.name); |
7c297722 | 160 | inotify_inode_queue_event(inode, mask, 0, NULL, NULL); |
0eeca283 RL |
161 | } |
162 | ||
163 | /* | |
164 | * fsnotify_close - file was closed | |
165 | */ | |
166 | static inline void fsnotify_close(struct file *file) | |
167 | { | |
0f7fc9e4 | 168 | struct dentry *dentry = file->f_path.dentry; |
0eeca283 RL |
169 | struct inode *inode = dentry->d_inode; |
170 | const char *name = dentry->d_name.name; | |
171 | mode_t mode = file->f_mode; | |
172 | u32 mask = (mode & FMODE_WRITE) ? IN_CLOSE_WRITE : IN_CLOSE_NOWRITE; | |
173 | ||
174 | if (S_ISDIR(inode->i_mode)) | |
175 | mask |= IN_ISDIR; | |
176 | ||
177 | inotify_dentry_parent_queue_event(dentry, mask, 0, name); | |
7c297722 | 178 | inotify_inode_queue_event(inode, mask, 0, NULL, NULL); |
0eeca283 RL |
179 | } |
180 | ||
181 | /* | |
182 | * fsnotify_xattr - extended attributes were changed | |
183 | */ | |
184 | static inline void fsnotify_xattr(struct dentry *dentry) | |
185 | { | |
186 | struct inode *inode = dentry->d_inode; | |
187 | u32 mask = IN_ATTRIB; | |
188 | ||
189 | if (S_ISDIR(inode->i_mode)) | |
190 | mask |= IN_ISDIR; | |
191 | ||
192 | inotify_dentry_parent_queue_event(dentry, mask, 0, dentry->d_name.name); | |
7c297722 | 193 | inotify_inode_queue_event(inode, mask, 0, NULL, NULL); |
0eeca283 RL |
194 | } |
195 | ||
196 | /* | |
197 | * fsnotify_change - notify_change event. file was modified and/or metadata | |
198 | * was changed. | |
199 | */ | |
200 | static inline void fsnotify_change(struct dentry *dentry, unsigned int ia_valid) | |
201 | { | |
202 | struct inode *inode = dentry->d_inode; | |
203 | int dn_mask = 0; | |
204 | u32 in_mask = 0; | |
205 | ||
206 | if (ia_valid & ATTR_UID) { | |
207 | in_mask |= IN_ATTRIB; | |
208 | dn_mask |= DN_ATTRIB; | |
209 | } | |
210 | if (ia_valid & ATTR_GID) { | |
211 | in_mask |= IN_ATTRIB; | |
212 | dn_mask |= DN_ATTRIB; | |
213 | } | |
214 | if (ia_valid & ATTR_SIZE) { | |
215 | in_mask |= IN_MODIFY; | |
216 | dn_mask |= DN_MODIFY; | |
217 | } | |
218 | /* both times implies a utime(s) call */ | |
219 | if ((ia_valid & (ATTR_ATIME | ATTR_MTIME)) == (ATTR_ATIME | ATTR_MTIME)) | |
220 | { | |
221 | in_mask |= IN_ATTRIB; | |
222 | dn_mask |= DN_ATTRIB; | |
223 | } else if (ia_valid & ATTR_ATIME) { | |
224 | in_mask |= IN_ACCESS; | |
225 | dn_mask |= DN_ACCESS; | |
226 | } else if (ia_valid & ATTR_MTIME) { | |
227 | in_mask |= IN_MODIFY; | |
228 | dn_mask |= DN_MODIFY; | |
229 | } | |
230 | if (ia_valid & ATTR_MODE) { | |
231 | in_mask |= IN_ATTRIB; | |
232 | dn_mask |= DN_ATTRIB; | |
233 | } | |
234 | ||
235 | if (dn_mask) | |
236 | dnotify_parent(dentry, dn_mask); | |
237 | if (in_mask) { | |
238 | if (S_ISDIR(inode->i_mode)) | |
239 | in_mask |= IN_ISDIR; | |
7c297722 | 240 | inotify_inode_queue_event(inode, in_mask, 0, NULL, NULL); |
0eeca283 RL |
241 | inotify_dentry_parent_queue_event(dentry, in_mask, 0, |
242 | dentry->d_name.name); | |
243 | } | |
244 | } | |
245 | ||
246 | #ifdef CONFIG_INOTIFY /* inotify helpers */ | |
247 | ||
248 | /* | |
249 | * fsnotify_oldname_init - save off the old filename before we change it | |
250 | */ | |
251 | static inline const char *fsnotify_oldname_init(const char *name) | |
252 | { | |
253 | return kstrdup(name, GFP_KERNEL); | |
254 | } | |
255 | ||
256 | /* | |
257 | * fsnotify_oldname_free - free the name we got from fsnotify_oldname_init | |
258 | */ | |
259 | static inline void fsnotify_oldname_free(const char *old_name) | |
260 | { | |
261 | kfree(old_name); | |
262 | } | |
263 | ||
264 | #else /* CONFIG_INOTIFY */ | |
265 | ||
266 | static inline const char *fsnotify_oldname_init(const char *name) | |
267 | { | |
268 | return NULL; | |
269 | } | |
270 | ||
271 | static inline void fsnotify_oldname_free(const char *old_name) | |
272 | { | |
273 | } | |
274 | ||
275 | #endif /* ! CONFIG_INOTIFY */ | |
276 | ||
277 | #endif /* __KERNEL__ */ | |
278 | ||
279 | #endif /* _LINUX_FS_NOTIFY_H */ |