| #ifndef _LINUX_FS_NOTIFY_H |
| #define _LINUX_FS_NOTIFY_H |
| |
| /* |
| * include/linux/fsnotify.h - generic hooks for filesystem notification, to |
| * reduce in-source duplication from both dnotify and inotify. |
| * |
| * We don't compile any of this away in some complicated menagerie of ifdefs. |
| * Instead, we rely on the code inside to optimize away as needed. |
| * |
| * (C) Copyright 2005 Robert Love |
| */ |
| |
| #include <linux/dnotify.h> |
| #include <linux/inotify.h> |
| #include <linux/fsnotify_backend.h> |
| #include <linux/audit.h> |
| |
| /* |
| * fsnotify_d_instantiate - instantiate a dentry for inode |
| * Called with dcache_lock held. |
| */ |
| static inline void fsnotify_d_instantiate(struct dentry *entry, |
| struct inode *inode) |
| { |
| __fsnotify_d_instantiate(entry, inode); |
| |
| inotify_d_instantiate(entry, inode); |
| } |
| |
| /* Notify this dentry's parent about a child's events. */ |
| static inline void fsnotify_parent(struct dentry *dentry, __u32 mask) |
| { |
| __fsnotify_parent(dentry, mask); |
| |
| inotify_dentry_parent_queue_event(dentry, mask, 0, dentry->d_name.name); |
| } |
| |
| /* |
| * fsnotify_d_move - entry has been moved |
| * Called with dcache_lock and entry->d_lock held. |
| */ |
| static inline void fsnotify_d_move(struct dentry *entry) |
| { |
| /* |
| * On move we need to update entry->d_flags to indicate if the new parent |
| * cares about events from this entry. |
| */ |
| __fsnotify_update_dcache_flags(entry); |
| |
| inotify_d_move(entry); |
| } |
| |
| /* |
| * fsnotify_link_count - inode's link count changed |
| */ |
| static inline void fsnotify_link_count(struct inode *inode) |
| { |
| inotify_inode_queue_event(inode, IN_ATTRIB, 0, NULL, NULL); |
| |
| fsnotify(inode, FS_ATTRIB, inode, FSNOTIFY_EVENT_INODE, NULL, 0); |
| } |
| |
| /* |
| * fsnotify_move - file old_name at old_dir was moved to new_name at new_dir |
| */ |
| static inline void fsnotify_move(struct inode *old_dir, struct inode *new_dir, |
| const char *old_name, const char *new_name, |
| int isdir, struct inode *target, struct dentry *moved) |
| { |
| struct inode *source = moved->d_inode; |
| u32 in_cookie = inotify_get_cookie(); |
| u32 fs_cookie = fsnotify_get_cookie(); |
| __u32 old_dir_mask = 0; |
| __u32 new_dir_mask = 0; |
| |
| if (old_dir == new_dir) { |
| old_dir_mask = FS_DN_RENAME; |
| } |
| |
| if (isdir) { |
| isdir = IN_ISDIR; |
| old_dir_mask |= FS_IN_ISDIR; |
| new_dir_mask |= FS_IN_ISDIR; |
| } |
| |
| old_dir_mask |= FS_MOVED_FROM; |
| new_dir_mask |= FS_MOVED_TO; |
| |
| inotify_inode_queue_event(old_dir, IN_MOVED_FROM|isdir, in_cookie, old_name, |
| source); |
| inotify_inode_queue_event(new_dir, IN_MOVED_TO|isdir, in_cookie, new_name, |
| source); |
| |
| fsnotify(old_dir, old_dir_mask, old_dir, FSNOTIFY_EVENT_INODE, old_name, fs_cookie); |
| fsnotify(new_dir, new_dir_mask, new_dir, FSNOTIFY_EVENT_INODE, new_name, fs_cookie); |
| |
| if (target) { |
| inotify_inode_queue_event(target, IN_DELETE_SELF, 0, NULL, NULL); |
| inotify_inode_is_dead(target); |
| |
| /* this is really a link_count change not a removal */ |
| fsnotify_link_count(target); |
| } |
| |
| if (source) { |
| inotify_inode_queue_event(source, IN_MOVE_SELF, 0, NULL, NULL); |
| fsnotify(source, FS_MOVE_SELF, moved->d_inode, FSNOTIFY_EVENT_INODE, NULL, 0); |
| } |
| audit_inode_child(new_name, moved, new_dir); |
| } |
| |
| /* |
| * fsnotify_inode_delete - and inode is being evicted from cache, clean up is needed |
| */ |
| static inline void fsnotify_inode_delete(struct inode *inode) |
| { |
| __fsnotify_inode_delete(inode); |
| } |
| |
| /* |
| * fsnotify_nameremove - a filename was removed from a directory |
| */ |
| static inline void fsnotify_nameremove(struct dentry *dentry, int isdir) |
| { |
| __u32 mask = FS_DELETE; |
| |
| if (isdir) |
| mask |= FS_IN_ISDIR; |
| |
| fsnotify_parent(dentry, mask); |
| } |
| |
| /* |
| * fsnotify_inoderemove - an inode is going away |
| */ |
| static inline void fsnotify_inoderemove(struct inode *inode) |
| { |
| inotify_inode_queue_event(inode, IN_DELETE_SELF, 0, NULL, NULL); |
| inotify_inode_is_dead(inode); |
| |
| fsnotify(inode, FS_DELETE_SELF, inode, FSNOTIFY_EVENT_INODE, NULL, 0); |
| __fsnotify_inode_delete(inode); |
| } |
| |
| /* |
| * fsnotify_create - 'name' was linked in |
| */ |
| static inline void fsnotify_create(struct inode *inode, struct dentry *dentry) |
| { |
| inotify_inode_queue_event(inode, IN_CREATE, 0, dentry->d_name.name, |
| dentry->d_inode); |
| audit_inode_child(dentry->d_name.name, dentry, inode); |
| |
| fsnotify(inode, FS_CREATE, dentry->d_inode, FSNOTIFY_EVENT_INODE, dentry->d_name.name, 0); |
| } |
| |
| /* |
| * fsnotify_link - new hardlink in 'inode' directory |
| * Note: We have to pass also the linked inode ptr as some filesystems leave |
| * new_dentry->d_inode NULL and instantiate inode pointer later |
| */ |
| static inline void fsnotify_link(struct inode *dir, struct inode *inode, struct dentry *new_dentry) |
| { |
| inotify_inode_queue_event(dir, IN_CREATE, 0, new_dentry->d_name.name, |
| inode); |
| fsnotify_link_count(inode); |
| audit_inode_child(new_dentry->d_name.name, new_dentry, dir); |
| |
| fsnotify(dir, FS_CREATE, inode, FSNOTIFY_EVENT_INODE, new_dentry->d_name.name, 0); |
| } |
| |
| /* |
| * fsnotify_mkdir - directory 'name' was created |
| */ |
| static inline void fsnotify_mkdir(struct inode *inode, struct dentry *dentry) |
| { |
| __u32 mask = (FS_CREATE | FS_IN_ISDIR); |
| struct inode *d_inode = dentry->d_inode; |
| |
| inotify_inode_queue_event(inode, mask, 0, dentry->d_name.name, d_inode); |
| audit_inode_child(dentry->d_name.name, dentry, inode); |
| |
| fsnotify(inode, mask, d_inode, FSNOTIFY_EVENT_INODE, dentry->d_name.name, 0); |
| } |
| |
| /* |
| * fsnotify_access - file was read |
| */ |
| static inline void fsnotify_access(struct dentry *dentry) |
| { |
| struct inode *inode = dentry->d_inode; |
| __u32 mask = FS_ACCESS; |
| |
| if (S_ISDIR(inode->i_mode)) |
| mask |= FS_IN_ISDIR; |
| |
| inotify_inode_queue_event(inode, mask, 0, NULL, NULL); |
| |
| fsnotify_parent(dentry, mask); |
| fsnotify(inode, mask, inode, FSNOTIFY_EVENT_INODE, NULL, 0); |
| } |
| |
| /* |
| * fsnotify_modify - file was modified |
| */ |
| static inline void fsnotify_modify(struct dentry *dentry) |
| { |
| struct inode *inode = dentry->d_inode; |
| __u32 mask = FS_MODIFY; |
| |
| if (S_ISDIR(inode->i_mode)) |
| mask |= FS_IN_ISDIR; |
| |
| inotify_inode_queue_event(inode, mask, 0, NULL, NULL); |
| |
| fsnotify_parent(dentry, mask); |
| fsnotify(inode, mask, inode, FSNOTIFY_EVENT_INODE, NULL, 0); |
| } |
| |
| /* |
| * fsnotify_open - file was opened |
| */ |
| static inline void fsnotify_open(struct dentry *dentry) |
| { |
| struct inode *inode = dentry->d_inode; |
| __u32 mask = FS_OPEN; |
| |
| if (S_ISDIR(inode->i_mode)) |
| mask |= FS_IN_ISDIR; |
| |
| inotify_inode_queue_event(inode, mask, 0, NULL, NULL); |
| |
| fsnotify_parent(dentry, mask); |
| fsnotify(inode, mask, inode, FSNOTIFY_EVENT_INODE, NULL, 0); |
| } |
| |
| /* |
| * fsnotify_close - file was closed |
| */ |
| static inline void fsnotify_close(struct file *file) |
| { |
| struct dentry *dentry = file->f_path.dentry; |
| struct inode *inode = dentry->d_inode; |
| fmode_t mode = file->f_mode; |
| __u32 mask = (mode & FMODE_WRITE) ? FS_CLOSE_WRITE : FS_CLOSE_NOWRITE; |
| |
| if (S_ISDIR(inode->i_mode)) |
| mask |= FS_IN_ISDIR; |
| |
| inotify_inode_queue_event(inode, mask, 0, NULL, NULL); |
| |
| fsnotify_parent(dentry, mask); |
| fsnotify(inode, mask, file, FSNOTIFY_EVENT_FILE, NULL, 0); |
| } |
| |
| /* |
| * fsnotify_xattr - extended attributes were changed |
| */ |
| static inline void fsnotify_xattr(struct dentry *dentry) |
| { |
| struct inode *inode = dentry->d_inode; |
| __u32 mask = FS_ATTRIB; |
| |
| if (S_ISDIR(inode->i_mode)) |
| mask |= FS_IN_ISDIR; |
| |
| inotify_inode_queue_event(inode, mask, 0, NULL, NULL); |
| |
| fsnotify_parent(dentry, mask); |
| fsnotify(inode, mask, inode, FSNOTIFY_EVENT_INODE, NULL, 0); |
| } |
| |
| /* |
| * fsnotify_change - notify_change event. file was modified and/or metadata |
| * was changed. |
| */ |
| static inline void fsnotify_change(struct dentry *dentry, unsigned int ia_valid) |
| { |
| struct inode *inode = dentry->d_inode; |
| __u32 mask = 0; |
| |
| if (ia_valid & ATTR_UID) |
| mask |= FS_ATTRIB; |
| if (ia_valid & ATTR_GID) |
| mask |= FS_ATTRIB; |
| if (ia_valid & ATTR_SIZE) |
| mask |= FS_MODIFY; |
| |
| /* both times implies a utime(s) call */ |
| if ((ia_valid & (ATTR_ATIME | ATTR_MTIME)) == (ATTR_ATIME | ATTR_MTIME)) |
| mask |= FS_ATTRIB; |
| else if (ia_valid & ATTR_ATIME) |
| mask |= FS_ACCESS; |
| else if (ia_valid & ATTR_MTIME) |
| mask |= FS_MODIFY; |
| |
| if (ia_valid & ATTR_MODE) |
| mask |= FS_ATTRIB; |
| |
| if (mask) { |
| if (S_ISDIR(inode->i_mode)) |
| mask |= FS_IN_ISDIR; |
| inotify_inode_queue_event(inode, mask, 0, NULL, NULL); |
| |
| fsnotify_parent(dentry, mask); |
| fsnotify(inode, mask, inode, FSNOTIFY_EVENT_INODE, NULL, 0); |
| } |
| } |
| |
| #if defined(CONFIG_INOTIFY) || defined(CONFIG_FSNOTIFY) /* notify helpers */ |
| |
| /* |
| * fsnotify_oldname_init - save off the old filename before we change it |
| */ |
| static inline const char *fsnotify_oldname_init(const char *name) |
| { |
| return kstrdup(name, GFP_KERNEL); |
| } |
| |
| /* |
| * fsnotify_oldname_free - free the name we got from fsnotify_oldname_init |
| */ |
| static inline void fsnotify_oldname_free(const char *old_name) |
| { |
| kfree(old_name); |
| } |
| |
| #else /* CONFIG_INOTIFY || CONFIG_FSNOTIFY */ |
| |
| static inline const char *fsnotify_oldname_init(const char *name) |
| { |
| return NULL; |
| } |
| |
| static inline void fsnotify_oldname_free(const char *old_name) |
| { |
| } |
| |
| #endif /* ! CONFIG_INOTIFY */ |
| |
| #endif /* _LINUX_FS_NOTIFY_H */ |