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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> | |
18 | ||
19 | /* | |
20 | * fsnotify_move - file old_name at old_dir was moved to new_name at new_dir | |
21 | */ | |
22 | static inline void fsnotify_move(struct inode *old_dir, struct inode *new_dir, | |
23 | const char *old_name, const char *new_name, | |
24 | int isdir) | |
25 | { | |
26 | u32 cookie = inotify_get_cookie(); | |
27 | ||
28 | if (old_dir == new_dir) | |
29 | inode_dir_notify(old_dir, DN_RENAME); | |
30 | else { | |
31 | inode_dir_notify(old_dir, DN_DELETE); | |
32 | inode_dir_notify(new_dir, DN_CREATE); | |
33 | } | |
34 | ||
35 | if (isdir) | |
36 | isdir = IN_ISDIR; | |
37 | inotify_inode_queue_event(old_dir, IN_MOVED_FROM|isdir,cookie,old_name); | |
38 | inotify_inode_queue_event(new_dir, IN_MOVED_TO|isdir, cookie, new_name); | |
39 | } | |
40 | ||
41 | /* | |
42 | * fsnotify_unlink - file was unlinked | |
43 | */ | |
44 | static inline void fsnotify_unlink(struct dentry *dentry, struct inode *dir) | |
45 | { | |
46 | struct inode *inode = dentry->d_inode; | |
47 | ||
48 | inode_dir_notify(dir, DN_DELETE); | |
49 | inotify_inode_queue_event(dir, IN_DELETE, 0, dentry->d_name.name); | |
50 | inotify_inode_queue_event(inode, IN_DELETE_SELF, 0, NULL); | |
51 | ||
52 | inotify_inode_is_dead(inode); | |
53 | } | |
54 | ||
55 | /* | |
56 | * fsnotify_rmdir - directory was removed | |
57 | */ | |
58 | static inline void fsnotify_rmdir(struct dentry *dentry, struct inode *inode, | |
59 | struct inode *dir) | |
60 | { | |
61 | inode_dir_notify(dir, DN_DELETE); | |
62 | inotify_inode_queue_event(dir,IN_DELETE|IN_ISDIR,0,dentry->d_name.name); | |
63 | inotify_inode_queue_event(inode, IN_DELETE_SELF | IN_ISDIR, 0, NULL); | |
64 | inotify_inode_is_dead(inode); | |
65 | } | |
66 | ||
67 | /* | |
68 | * fsnotify_create - 'name' was linked in | |
69 | */ | |
70 | static inline void fsnotify_create(struct inode *inode, const char *name) | |
71 | { | |
72 | inode_dir_notify(inode, DN_CREATE); | |
73 | inotify_inode_queue_event(inode, IN_CREATE, 0, name); | |
74 | } | |
75 | ||
76 | /* | |
77 | * fsnotify_mkdir - directory 'name' was created | |
78 | */ | |
79 | static inline void fsnotify_mkdir(struct inode *inode, const char *name) | |
80 | { | |
81 | inode_dir_notify(inode, DN_CREATE); | |
82 | inotify_inode_queue_event(inode, IN_CREATE | IN_ISDIR, 0, name); | |
83 | } | |
84 | ||
85 | /* | |
86 | * fsnotify_access - file was read | |
87 | */ | |
88 | static inline void fsnotify_access(struct dentry *dentry) | |
89 | { | |
90 | struct inode *inode = dentry->d_inode; | |
91 | u32 mask = IN_ACCESS; | |
92 | ||
93 | if (S_ISDIR(inode->i_mode)) | |
94 | mask |= IN_ISDIR; | |
95 | ||
96 | dnotify_parent(dentry, DN_ACCESS); | |
97 | inotify_dentry_parent_queue_event(dentry, mask, 0, dentry->d_name.name); | |
98 | inotify_inode_queue_event(inode, mask, 0, NULL); | |
99 | } | |
100 | ||
101 | /* | |
102 | * fsnotify_modify - file was modified | |
103 | */ | |
104 | static inline void fsnotify_modify(struct dentry *dentry) | |
105 | { | |
106 | struct inode *inode = dentry->d_inode; | |
107 | u32 mask = IN_MODIFY; | |
108 | ||
109 | if (S_ISDIR(inode->i_mode)) | |
110 | mask |= IN_ISDIR; | |
111 | ||
112 | dnotify_parent(dentry, DN_MODIFY); | |
113 | inotify_dentry_parent_queue_event(dentry, mask, 0, dentry->d_name.name); | |
114 | inotify_inode_queue_event(inode, mask, 0, NULL); | |
115 | } | |
116 | ||
117 | /* | |
118 | * fsnotify_open - file was opened | |
119 | */ | |
120 | static inline void fsnotify_open(struct dentry *dentry) | |
121 | { | |
122 | struct inode *inode = dentry->d_inode; | |
123 | u32 mask = IN_OPEN; | |
124 | ||
125 | if (S_ISDIR(inode->i_mode)) | |
126 | mask |= IN_ISDIR; | |
127 | ||
128 | inotify_inode_queue_event(inode, mask, 0, NULL); | |
129 | inotify_dentry_parent_queue_event(dentry, mask, 0, dentry->d_name.name); | |
130 | } | |
131 | ||
132 | /* | |
133 | * fsnotify_close - file was closed | |
134 | */ | |
135 | static inline void fsnotify_close(struct file *file) | |
136 | { | |
137 | struct dentry *dentry = file->f_dentry; | |
138 | struct inode *inode = dentry->d_inode; | |
139 | const char *name = dentry->d_name.name; | |
140 | mode_t mode = file->f_mode; | |
141 | u32 mask = (mode & FMODE_WRITE) ? IN_CLOSE_WRITE : IN_CLOSE_NOWRITE; | |
142 | ||
143 | if (S_ISDIR(inode->i_mode)) | |
144 | mask |= IN_ISDIR; | |
145 | ||
146 | inotify_dentry_parent_queue_event(dentry, mask, 0, name); | |
147 | inotify_inode_queue_event(inode, mask, 0, NULL); | |
148 | } | |
149 | ||
150 | /* | |
151 | * fsnotify_xattr - extended attributes were changed | |
152 | */ | |
153 | static inline void fsnotify_xattr(struct dentry *dentry) | |
154 | { | |
155 | struct inode *inode = dentry->d_inode; | |
156 | u32 mask = IN_ATTRIB; | |
157 | ||
158 | if (S_ISDIR(inode->i_mode)) | |
159 | mask |= IN_ISDIR; | |
160 | ||
161 | inotify_dentry_parent_queue_event(dentry, mask, 0, dentry->d_name.name); | |
162 | inotify_inode_queue_event(inode, mask, 0, NULL); | |
163 | } | |
164 | ||
165 | /* | |
166 | * fsnotify_change - notify_change event. file was modified and/or metadata | |
167 | * was changed. | |
168 | */ | |
169 | static inline void fsnotify_change(struct dentry *dentry, unsigned int ia_valid) | |
170 | { | |
171 | struct inode *inode = dentry->d_inode; | |
172 | int dn_mask = 0; | |
173 | u32 in_mask = 0; | |
174 | ||
175 | if (ia_valid & ATTR_UID) { | |
176 | in_mask |= IN_ATTRIB; | |
177 | dn_mask |= DN_ATTRIB; | |
178 | } | |
179 | if (ia_valid & ATTR_GID) { | |
180 | in_mask |= IN_ATTRIB; | |
181 | dn_mask |= DN_ATTRIB; | |
182 | } | |
183 | if (ia_valid & ATTR_SIZE) { | |
184 | in_mask |= IN_MODIFY; | |
185 | dn_mask |= DN_MODIFY; | |
186 | } | |
187 | /* both times implies a utime(s) call */ | |
188 | if ((ia_valid & (ATTR_ATIME | ATTR_MTIME)) == (ATTR_ATIME | ATTR_MTIME)) | |
189 | { | |
190 | in_mask |= IN_ATTRIB; | |
191 | dn_mask |= DN_ATTRIB; | |
192 | } else if (ia_valid & ATTR_ATIME) { | |
193 | in_mask |= IN_ACCESS; | |
194 | dn_mask |= DN_ACCESS; | |
195 | } else if (ia_valid & ATTR_MTIME) { | |
196 | in_mask |= IN_MODIFY; | |
197 | dn_mask |= DN_MODIFY; | |
198 | } | |
199 | if (ia_valid & ATTR_MODE) { | |
200 | in_mask |= IN_ATTRIB; | |
201 | dn_mask |= DN_ATTRIB; | |
202 | } | |
203 | ||
204 | if (dn_mask) | |
205 | dnotify_parent(dentry, dn_mask); | |
206 | if (in_mask) { | |
207 | if (S_ISDIR(inode->i_mode)) | |
208 | in_mask |= IN_ISDIR; | |
209 | inotify_inode_queue_event(inode, in_mask, 0, NULL); | |
210 | inotify_dentry_parent_queue_event(dentry, in_mask, 0, | |
211 | dentry->d_name.name); | |
212 | } | |
213 | } | |
214 | ||
215 | #ifdef CONFIG_INOTIFY /* inotify helpers */ | |
216 | ||
217 | /* | |
218 | * fsnotify_oldname_init - save off the old filename before we change it | |
219 | */ | |
220 | static inline const char *fsnotify_oldname_init(const char *name) | |
221 | { | |
222 | return kstrdup(name, GFP_KERNEL); | |
223 | } | |
224 | ||
225 | /* | |
226 | * fsnotify_oldname_free - free the name we got from fsnotify_oldname_init | |
227 | */ | |
228 | static inline void fsnotify_oldname_free(const char *old_name) | |
229 | { | |
230 | kfree(old_name); | |
231 | } | |
232 | ||
233 | #else /* CONFIG_INOTIFY */ | |
234 | ||
235 | static inline const char *fsnotify_oldname_init(const char *name) | |
236 | { | |
237 | return NULL; | |
238 | } | |
239 | ||
240 | static inline void fsnotify_oldname_free(const char *old_name) | |
241 | { | |
242 | } | |
243 | ||
244 | #endif /* ! CONFIG_INOTIFY */ | |
245 | ||
246 | #endif /* __KERNEL__ */ | |
247 | ||
248 | #endif /* _LINUX_FS_NOTIFY_H */ |