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#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 */ #ifdef __KERNEL__ #include <linux/dnotify.h> #include <linux/inotify.h> /* * 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 inode *source) { u32 cookie = inotify_get_cookie(); if (old_dir == new_dir) inode_dir_notify(old_dir, DN_RENAME); else { inode_dir_notify(old_dir, DN_DELETE); inode_dir_notify(new_dir, DN_CREATE); } if (isdir) isdir = IN_ISDIR; inotify_inode_queue_event(old_dir, IN_MOVED_FROM|isdir,cookie,old_name); inotify_inode_queue_event(new_dir, IN_MOVED_TO|isdir, cookie, new_name); if (target) { inotify_inode_queue_event(target, IN_DELETE_SELF, 0, NULL); inotify_inode_is_dead(target); } if (source) { inotify_inode_queue_event(source, IN_MOVE_SELF, 0, NULL); } } /* * fsnotify_nameremove - a filename was removed from a directory */ static inline void fsnotify_nameremove(struct dentry *dentry, int isdir) { if (isdir) isdir = IN_ISDIR; dnotify_parent(dentry, DN_DELETE); inotify_dentry_parent_queue_event(dentry, IN_DELETE|isdir, 0, dentry->d_name.name); } /* * 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); inotify_inode_is_dead(inode); } /* * fsnotify_create - 'name' was linked in */ static inline void fsnotify_create(struct inode *inode, const char *name) { inode_dir_notify(inode, DN_CREATE); inotify_inode_queue_event(inode, IN_CREATE, 0, name); } /* * fsnotify_mkdir - directory 'name' was created */ static inline void fsnotify_mkdir(struct inode *inode, const char *name) { inode_dir_notify(inode, DN_CREATE); inotify_inode_queue_event(inode, IN_CREATE | IN_ISDIR, 0, name); } /* * fsnotify_access - file was read */ static inline void fsnotify_access(struct dentry *dentry) { struct inode *inode = dentry->d_inode; u32 mask = IN_ACCESS; if (S_ISDIR(inode->i_mode)) mask |= IN_ISDIR; dnotify_parent(dentry, DN_ACCESS); inotify_dentry_parent_queue_event(dentry, mask, 0, dentry->d_name.name); inotify_inode_queue_event(inode, mask, 0, NULL); } /* * fsnotify_modify - file was modified */ static inline void fsnotify_modify(struct dentry *dentry) { struct inode *inode = dentry->d_inode; u32 mask = IN_MODIFY; if (S_ISDIR(inode->i_mode)) mask |= IN_ISDIR; dnotify_parent(dentry, DN_MODIFY); inotify_dentry_parent_queue_event(dentry, mask, 0, dentry->d_name.name); inotify_inode_queue_event(inode, mask, 0, NULL); } /* * fsnotify_open - file was opened */ static inline void fsnotify_open(struct dentry *dentry) { struct inode *inode = dentry->d_inode; u32 mask = IN_OPEN; if (S_ISDIR(inode->i_mode)) mask |= IN_ISDIR; inotify_dentry_parent_queue_event(dentry, mask, 0, dentry->d_name.name); inotify_inode_queue_event(inode, mask, 0, NULL); } /* * fsnotify_close - file was closed */ static inline void fsnotify_close(struct file *file) { struct dentry *dentry = file->f_dentry; struct inode *inode = dentry->d_inode; const char *name = dentry->d_name.name; mode_t mode = file->f_mode; u32 mask = (mode & FMODE_WRITE) ? IN_CLOSE_WRITE : IN_CLOSE_NOWRITE; if (S_ISDIR(inode->i_mode)) mask |= IN_ISDIR; inotify_dentry_parent_queue_event(dentry, mask, 0, name); inotify_inode_queue_event(inode, mask, 0, NULL); } /* * fsnotify_xattr - extended attributes were changed */ static inline void fsnotify_xattr(struct dentry *dentry) { struct inode *inode = dentry->d_inode; u32 mask = IN_ATTRIB; if (S_ISDIR(inode->i_mode)) mask |= IN_ISDIR; inotify_dentry_parent_queue_event(dentry, mask, 0, dentry->d_name.name); inotify_inode_queue_event(inode, mask, 0, NULL); } /* * 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; int dn_mask = 0; u32 in_mask = 0; if (ia_valid & ATTR_UID) { in_mask |= IN_ATTRIB; dn_mask |= DN_ATTRIB; } if (ia_valid & ATTR_GID) { in_mask |= IN_ATTRIB; dn_mask |= DN_ATTRIB; } if (ia_valid & ATTR_SIZE) { in_mask |= IN_MODIFY; dn_mask |= DN_MODIFY; } /* both times implies a utime(s) call */ if ((ia_valid & (ATTR_ATIME | ATTR_MTIME)) == (ATTR_ATIME | ATTR_MTIME)) { in_mask |= IN_ATTRIB; dn_mask |= DN_ATTRIB; } else if (ia_valid & ATTR_ATIME) { in_mask |= IN_ACCESS; dn_mask |= DN_ACCESS; } else if (ia_valid & ATTR_MTIME) { in_mask |= IN_MODIFY; dn_mask |= DN_MODIFY; } if (ia_valid & ATTR_MODE) { in_mask |= IN_ATTRIB; dn_mask |= DN_ATTRIB; } if (dn_mask) dnotify_parent(dentry, dn_mask); if (in_mask) { if (S_ISDIR(inode->i_mode)) in_mask |= IN_ISDIR; inotify_inode_queue_event(inode, in_mask, 0, NULL); inotify_dentry_parent_queue_event(dentry, in_mask, 0, dentry->d_name.name); } } #ifdef CONFIG_INOTIFY /* inotify 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 */ 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 /* __KERNEL__ */ #endif /* _LINUX_FS_NOTIFY_H */