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0eeca283 RL |
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 | ||
0eeca283 RL |
14 | #include <linux/dnotify.h> |
15 | #include <linux/inotify.h> | |
73241ccc | 16 | #include <linux/audit.h> |
0eeca283 | 17 | |
c32ccd87 NP |
18 | /* |
19 | * fsnotify_d_instantiate - instantiate a dentry for inode | |
20 | * Called with dcache_lock held. | |
21 | */ | |
22 | static inline void fsnotify_d_instantiate(struct dentry *entry, | |
23 | struct inode *inode) | |
24 | { | |
25 | inotify_d_instantiate(entry, inode); | |
26 | } | |
27 | ||
28 | /* | |
29 | * fsnotify_d_move - entry has been moved | |
30 | * Called with dcache_lock and entry->d_lock held. | |
31 | */ | |
32 | static inline void fsnotify_d_move(struct dentry *entry) | |
33 | { | |
34 | inotify_d_move(entry); | |
35 | } | |
36 | ||
0eeca283 RL |
37 | /* |
38 | * fsnotify_move - file old_name at old_dir was moved to new_name at new_dir | |
39 | */ | |
40 | static inline void fsnotify_move(struct inode *old_dir, struct inode *new_dir, | |
41 | const char *old_name, const char *new_name, | |
5a190ae6 | 42 | int isdir, struct inode *target, struct dentry *moved) |
0eeca283 | 43 | { |
5a190ae6 | 44 | struct inode *source = moved->d_inode; |
0eeca283 RL |
45 | u32 cookie = inotify_get_cookie(); |
46 | ||
47 | if (old_dir == new_dir) | |
48 | inode_dir_notify(old_dir, DN_RENAME); | |
49 | else { | |
50 | inode_dir_notify(old_dir, DN_DELETE); | |
51 | inode_dir_notify(new_dir, DN_CREATE); | |
52 | } | |
53 | ||
54 | if (isdir) | |
55 | isdir = IN_ISDIR; | |
7c297722 AG |
56 | inotify_inode_queue_event(old_dir, IN_MOVED_FROM|isdir,cookie,old_name, |
57 | source); | |
58 | inotify_inode_queue_event(new_dir, IN_MOVED_TO|isdir, cookie, new_name, | |
59 | source); | |
75449536 JM |
60 | |
61 | if (target) { | |
7c297722 | 62 | inotify_inode_queue_event(target, IN_DELETE_SELF, 0, NULL, NULL); |
75449536 JM |
63 | inotify_inode_is_dead(target); |
64 | } | |
89204c40 JM |
65 | |
66 | if (source) { | |
7c297722 | 67 | inotify_inode_queue_event(source, IN_MOVE_SELF, 0, NULL, NULL); |
89204c40 | 68 | } |
5a190ae6 | 69 | audit_inode_child(new_name, moved, new_dir); |
0eeca283 RL |
70 | } |
71 | ||
7a91bf7f JM |
72 | /* |
73 | * fsnotify_nameremove - a filename was removed from a directory | |
74 | */ | |
75 | static inline void fsnotify_nameremove(struct dentry *dentry, int isdir) | |
76 | { | |
77 | if (isdir) | |
78 | isdir = IN_ISDIR; | |
79 | dnotify_parent(dentry, DN_DELETE); | |
80 | inotify_dentry_parent_queue_event(dentry, IN_DELETE|isdir, 0, dentry->d_name.name); | |
81 | } | |
82 | ||
83 | /* | |
84 | * fsnotify_inoderemove - an inode is going away | |
85 | */ | |
86 | static inline void fsnotify_inoderemove(struct inode *inode) | |
87 | { | |
7c297722 | 88 | inotify_inode_queue_event(inode, IN_DELETE_SELF, 0, NULL, NULL); |
7a91bf7f JM |
89 | inotify_inode_is_dead(inode); |
90 | } | |
91 | ||
ece95912 JK |
92 | /* |
93 | * fsnotify_link_count - inode's link count changed | |
94 | */ | |
95 | static inline void fsnotify_link_count(struct inode *inode) | |
96 | { | |
97 | inotify_inode_queue_event(inode, IN_ATTRIB, 0, NULL, NULL); | |
98 | } | |
99 | ||
0eeca283 RL |
100 | /* |
101 | * fsnotify_create - 'name' was linked in | |
102 | */ | |
f38aa942 | 103 | static inline void fsnotify_create(struct inode *inode, struct dentry *dentry) |
0eeca283 RL |
104 | { |
105 | inode_dir_notify(inode, DN_CREATE); | |
7c297722 AG |
106 | inotify_inode_queue_event(inode, IN_CREATE, 0, dentry->d_name.name, |
107 | dentry->d_inode); | |
5a190ae6 | 108 | audit_inode_child(dentry->d_name.name, dentry, inode); |
0eeca283 RL |
109 | } |
110 | ||
ece95912 JK |
111 | /* |
112 | * fsnotify_link - new hardlink in 'inode' directory | |
113 | * Note: We have to pass also the linked inode ptr as some filesystems leave | |
114 | * new_dentry->d_inode NULL and instantiate inode pointer later | |
115 | */ | |
116 | static inline void fsnotify_link(struct inode *dir, struct inode *inode, struct dentry *new_dentry) | |
117 | { | |
118 | inode_dir_notify(dir, DN_CREATE); | |
119 | inotify_inode_queue_event(dir, IN_CREATE, 0, new_dentry->d_name.name, | |
120 | inode); | |
121 | fsnotify_link_count(inode); | |
122 | audit_inode_child(new_dentry->d_name.name, new_dentry, dir); | |
123 | } | |
124 | ||
0eeca283 RL |
125 | /* |
126 | * fsnotify_mkdir - directory 'name' was created | |
127 | */ | |
f38aa942 | 128 | static inline void fsnotify_mkdir(struct inode *inode, struct dentry *dentry) |
0eeca283 RL |
129 | { |
130 | inode_dir_notify(inode, DN_CREATE); | |
f38aa942 | 131 | inotify_inode_queue_event(inode, IN_CREATE | IN_ISDIR, 0, |
7c297722 | 132 | dentry->d_name.name, dentry->d_inode); |
5a190ae6 | 133 | audit_inode_child(dentry->d_name.name, dentry, inode); |
0eeca283 RL |
134 | } |
135 | ||
136 | /* | |
137 | * fsnotify_access - file was read | |
138 | */ | |
139 | static inline void fsnotify_access(struct dentry *dentry) | |
140 | { | |
141 | struct inode *inode = dentry->d_inode; | |
142 | u32 mask = IN_ACCESS; | |
143 | ||
144 | if (S_ISDIR(inode->i_mode)) | |
145 | mask |= IN_ISDIR; | |
146 | ||
147 | dnotify_parent(dentry, DN_ACCESS); | |
148 | inotify_dentry_parent_queue_event(dentry, mask, 0, dentry->d_name.name); | |
7c297722 | 149 | inotify_inode_queue_event(inode, mask, 0, NULL, NULL); |
0eeca283 RL |
150 | } |
151 | ||
152 | /* | |
153 | * fsnotify_modify - file was modified | |
154 | */ | |
155 | static inline void fsnotify_modify(struct dentry *dentry) | |
156 | { | |
157 | struct inode *inode = dentry->d_inode; | |
158 | u32 mask = IN_MODIFY; | |
159 | ||
160 | if (S_ISDIR(inode->i_mode)) | |
161 | mask |= IN_ISDIR; | |
162 | ||
163 | dnotify_parent(dentry, DN_MODIFY); | |
164 | inotify_dentry_parent_queue_event(dentry, mask, 0, dentry->d_name.name); | |
7c297722 | 165 | inotify_inode_queue_event(inode, mask, 0, NULL, NULL); |
0eeca283 RL |
166 | } |
167 | ||
168 | /* | |
169 | * fsnotify_open - file was opened | |
170 | */ | |
171 | static inline void fsnotify_open(struct dentry *dentry) | |
172 | { | |
173 | struct inode *inode = dentry->d_inode; | |
174 | u32 mask = IN_OPEN; | |
175 | ||
176 | if (S_ISDIR(inode->i_mode)) | |
177 | mask |= IN_ISDIR; | |
178 | ||
0eeca283 | 179 | inotify_dentry_parent_queue_event(dentry, mask, 0, dentry->d_name.name); |
7c297722 | 180 | inotify_inode_queue_event(inode, mask, 0, NULL, NULL); |
0eeca283 RL |
181 | } |
182 | ||
183 | /* | |
184 | * fsnotify_close - file was closed | |
185 | */ | |
186 | static inline void fsnotify_close(struct file *file) | |
187 | { | |
0f7fc9e4 | 188 | struct dentry *dentry = file->f_path.dentry; |
0eeca283 RL |
189 | struct inode *inode = dentry->d_inode; |
190 | const char *name = dentry->d_name.name; | |
191 | mode_t mode = file->f_mode; | |
192 | u32 mask = (mode & FMODE_WRITE) ? IN_CLOSE_WRITE : IN_CLOSE_NOWRITE; | |
193 | ||
194 | if (S_ISDIR(inode->i_mode)) | |
195 | mask |= IN_ISDIR; | |
196 | ||
197 | inotify_dentry_parent_queue_event(dentry, mask, 0, name); | |
7c297722 | 198 | inotify_inode_queue_event(inode, mask, 0, NULL, NULL); |
0eeca283 RL |
199 | } |
200 | ||
201 | /* | |
202 | * fsnotify_xattr - extended attributes were changed | |
203 | */ | |
204 | static inline void fsnotify_xattr(struct dentry *dentry) | |
205 | { | |
206 | struct inode *inode = dentry->d_inode; | |
207 | u32 mask = IN_ATTRIB; | |
208 | ||
209 | if (S_ISDIR(inode->i_mode)) | |
210 | mask |= IN_ISDIR; | |
211 | ||
212 | inotify_dentry_parent_queue_event(dentry, mask, 0, dentry->d_name.name); | |
7c297722 | 213 | inotify_inode_queue_event(inode, mask, 0, NULL, NULL); |
0eeca283 RL |
214 | } |
215 | ||
216 | /* | |
217 | * fsnotify_change - notify_change event. file was modified and/or metadata | |
218 | * was changed. | |
219 | */ | |
220 | static inline void fsnotify_change(struct dentry *dentry, unsigned int ia_valid) | |
221 | { | |
222 | struct inode *inode = dentry->d_inode; | |
223 | int dn_mask = 0; | |
224 | u32 in_mask = 0; | |
225 | ||
226 | if (ia_valid & ATTR_UID) { | |
227 | in_mask |= IN_ATTRIB; | |
228 | dn_mask |= DN_ATTRIB; | |
229 | } | |
230 | if (ia_valid & ATTR_GID) { | |
231 | in_mask |= IN_ATTRIB; | |
232 | dn_mask |= DN_ATTRIB; | |
233 | } | |
234 | if (ia_valid & ATTR_SIZE) { | |
235 | in_mask |= IN_MODIFY; | |
236 | dn_mask |= DN_MODIFY; | |
237 | } | |
238 | /* both times implies a utime(s) call */ | |
239 | if ((ia_valid & (ATTR_ATIME | ATTR_MTIME)) == (ATTR_ATIME | ATTR_MTIME)) | |
240 | { | |
241 | in_mask |= IN_ATTRIB; | |
242 | dn_mask |= DN_ATTRIB; | |
243 | } else if (ia_valid & ATTR_ATIME) { | |
244 | in_mask |= IN_ACCESS; | |
245 | dn_mask |= DN_ACCESS; | |
246 | } else if (ia_valid & ATTR_MTIME) { | |
247 | in_mask |= IN_MODIFY; | |
248 | dn_mask |= DN_MODIFY; | |
249 | } | |
250 | if (ia_valid & ATTR_MODE) { | |
251 | in_mask |= IN_ATTRIB; | |
252 | dn_mask |= DN_ATTRIB; | |
253 | } | |
254 | ||
255 | if (dn_mask) | |
256 | dnotify_parent(dentry, dn_mask); | |
257 | if (in_mask) { | |
258 | if (S_ISDIR(inode->i_mode)) | |
259 | in_mask |= IN_ISDIR; | |
7c297722 | 260 | inotify_inode_queue_event(inode, in_mask, 0, NULL, NULL); |
0eeca283 RL |
261 | inotify_dentry_parent_queue_event(dentry, in_mask, 0, |
262 | dentry->d_name.name); | |
263 | } | |
264 | } | |
265 | ||
266 | #ifdef CONFIG_INOTIFY /* inotify helpers */ | |
267 | ||
268 | /* | |
269 | * fsnotify_oldname_init - save off the old filename before we change it | |
270 | */ | |
271 | static inline const char *fsnotify_oldname_init(const char *name) | |
272 | { | |
273 | return kstrdup(name, GFP_KERNEL); | |
274 | } | |
275 | ||
276 | /* | |
277 | * fsnotify_oldname_free - free the name we got from fsnotify_oldname_init | |
278 | */ | |
279 | static inline void fsnotify_oldname_free(const char *old_name) | |
280 | { | |
281 | kfree(old_name); | |
282 | } | |
283 | ||
284 | #else /* CONFIG_INOTIFY */ | |
285 | ||
286 | static inline const char *fsnotify_oldname_init(const char *name) | |
287 | { | |
288 | return NULL; | |
289 | } | |
290 | ||
291 | static inline void fsnotify_oldname_free(const char *old_name) | |
292 | { | |
293 | } | |
294 | ||
295 | #endif /* ! CONFIG_INOTIFY */ | |
296 | ||
0eeca283 | 297 | #endif /* _LINUX_FS_NOTIFY_H */ |