33 static struct kernfs_iattrs *__kernfs_iattrs(struct kernfs_node *kn, int alloc)  in __kernfs_iattrs()  argument
40 	if (kn->iattr || !alloc)  in __kernfs_iattrs()
43 	kn->iattr = kmem_cache_zalloc(kernfs_iattrs_cache, GFP_KERNEL);  in __kernfs_iattrs()
44 	if (!kn->iattr)  in __kernfs_iattrs()
48 	kn->iattr->ia_uid = GLOBAL_ROOT_UID;  in __kernfs_iattrs()
49 	kn->iattr->ia_gid = GLOBAL_ROOT_GID;  in __kernfs_iattrs()
51 	ktime_get_real_ts64(&kn->iattr->ia_atime);  in __kernfs_iattrs()
52 	kn->iattr->ia_mtime = kn->iattr->ia_atime;  in __kernfs_iattrs()
53 	kn->iattr->ia_ctime = kn->iattr->ia_atime;  in __kernfs_iattrs()
55 	simple_xattrs_init(&kn->iattr->xattrs);  in __kernfs_iattrs()
56 	atomic_set(&kn->iattr->nr_user_xattrs, 0);  in __kernfs_iattrs()
57 	atomic_set(&kn->iattr->user_xattr_size, 0);  in __kernfs_iattrs()
59 	ret = kn->iattr;  in __kernfs_iattrs()
64 static struct kernfs_iattrs *kernfs_iattrs(struct kernfs_node *kn)  in kernfs_iattrs()  argument
66 	return __kernfs_iattrs(kn, 1);  in kernfs_iattrs()
69 static struct kernfs_iattrs *kernfs_iattrs_noalloc(struct kernfs_node *kn)  in kernfs_iattrs_noalloc()  argument
71 	return __kernfs_iattrs(kn, 0);  in kernfs_iattrs_noalloc()
74 int __kernfs_setattr(struct kernfs_node *kn, const struct iattr *iattr)  in __kernfs_setattr()  argument
79 	attrs = kernfs_iattrs(kn);  in __kernfs_setattr()
94 		kn->mode = iattr->ia_mode;  in __kernfs_setattr()
105 int kernfs_setattr(struct kernfs_node *kn, const struct iattr *iattr)  in kernfs_setattr()  argument
110 	ret = __kernfs_setattr(kn, iattr);  in kernfs_setattr()
118 	struct kernfs_node *kn = inode->i_private;  in kernfs_iop_setattr()  local
121 	if (!kn)  in kernfs_iop_setattr()
129 	error = __kernfs_setattr(kn, iattr);  in kernfs_iop_setattr()
143 	struct kernfs_node *kn = kernfs_dentry_node(dentry);  in kernfs_iop_listxattr()  local
146 	attrs = kernfs_iattrs(kn);  in kernfs_iop_listxattr()
170 static void kernfs_refresh_inode(struct kernfs_node *kn, struct inode *inode)  in kernfs_refresh_inode()  argument
172 	struct kernfs_iattrs *attrs = kn->iattr;  in kernfs_refresh_inode()
174 	inode->i_mode = kn->mode;  in kernfs_refresh_inode()
182 	if (kernfs_type(kn) == KERNFS_DIR)  in kernfs_refresh_inode()
183 		set_nlink(inode, kn->dir.subdirs + 2);  in kernfs_refresh_inode()
190 	struct kernfs_node *kn = inode->i_private;  in kernfs_iop_getattr()  local
193 	kernfs_refresh_inode(kn, inode);  in kernfs_iop_getattr()
200 static void kernfs_init_inode(struct kernfs_node *kn, struct inode *inode)  in kernfs_init_inode()  argument
202 	kernfs_get(kn);  in kernfs_init_inode()
203 	inode->i_private = kn;  in kernfs_init_inode()
206 	inode->i_generation = kernfs_gen(kn);  in kernfs_init_inode()
208 	set_default_inode_attr(inode, kn->mode);  in kernfs_init_inode()
209 	kernfs_refresh_inode(kn, inode);  in kernfs_init_inode()
212 	switch (kernfs_type(kn)) {  in kernfs_init_inode()
216 		if (kn->flags & KERNFS_EMPTY_DIR)  in kernfs_init_inode()
220 		inode->i_size = kn->attr.size;  in kernfs_init_inode()
248 struct inode *kernfs_get_inode(struct super_block *sb, struct kernfs_node *kn)  in kernfs_get_inode()  argument
252 	inode = iget_locked(sb, kernfs_ino(kn));  in kernfs_get_inode()
254 		kernfs_init_inode(kn, inode);  in kernfs_get_inode()
268 	struct kernfs_node *kn = inode->i_private;  in kernfs_evict_inode()  local
272 	kernfs_put(kn);  in kernfs_evict_inode()
277 	struct kernfs_node *kn;  in kernfs_iop_permission()  local
282 	kn = inode->i_private;  in kernfs_iop_permission()
285 	kernfs_refresh_inode(kn, inode);  in kernfs_iop_permission()
291 int kernfs_xattr_get(struct kernfs_node *kn, const char *name,  in kernfs_xattr_get()  argument
294 	struct kernfs_iattrs *attrs = kernfs_iattrs_noalloc(kn);  in kernfs_xattr_get()
301 int kernfs_xattr_set(struct kernfs_node *kn, const char *name,  in kernfs_xattr_set()  argument
304 	struct kernfs_iattrs *attrs = kernfs_iattrs(kn);  in kernfs_xattr_set()
317 	struct kernfs_node *kn = inode->i_private;  in kernfs_vfs_xattr_get()  local
319 	return kernfs_xattr_get(kn, name, value, size);  in kernfs_vfs_xattr_get()
328 	struct kernfs_node *kn = inode->i_private;  in kernfs_vfs_xattr_set()  local
330 	return kernfs_xattr_set(kn, name, value, size, flags);  in kernfs_vfs_xattr_set()
333 static int kernfs_vfs_user_xattr_add(struct kernfs_node *kn,  in kernfs_vfs_user_xattr_add()  argument
338 	atomic_t *sz = &kn->iattr->user_xattr_size;  in kernfs_vfs_user_xattr_add()
339 	atomic_t *nr = &kn->iattr->nr_user_xattrs;  in kernfs_vfs_user_xattr_add()
367 static int kernfs_vfs_user_xattr_rm(struct kernfs_node *kn,  in kernfs_vfs_user_xattr_rm()  argument
372 	atomic_t *sz = &kn->iattr->user_xattr_size;  in kernfs_vfs_user_xattr_rm()
373 	atomic_t *nr = &kn->iattr->nr_user_xattrs;  in kernfs_vfs_user_xattr_rm()
394 	struct kernfs_node *kn = inode->i_private;  in kernfs_vfs_user_xattr_set()  local
397 	if (!(kernfs_root(kn)->flags & KERNFS_ROOT_SUPPORT_USER_XATTR))  in kernfs_vfs_user_xattr_set()
400 	attrs = kernfs_iattrs(kn);  in kernfs_vfs_user_xattr_set()
405 		return kernfs_vfs_user_xattr_add(kn, full_name, &attrs->xattrs,  in kernfs_vfs_user_xattr_set()
408 		return kernfs_vfs_user_xattr_rm(kn, full_name, &attrs->xattrs,  in kernfs_vfs_user_xattr_set()