42 int ovl_copy_xattr(struct dentry *old, struct dentry *new)  in ovl_copy_xattr()
183 static int ovl_set_size(struct dentry *upperdentry, struct kstat *stat)  in ovl_set_size()
193 static int ovl_set_timestamps(struct dentry *upperdentry, struct kstat *stat)  in ovl_set_timestamps()
205 int ovl_set_attr(struct dentry *upperdentry, struct kstat *stat)  in ovl_set_attr()
230 struct ovl_fh *ovl_encode_real_fh(struct dentry *real, bool is_upper)  in ovl_encode_real_fh()
286 int ovl_set_origin(struct dentry *dentry, struct dentry *lower,  in ovl_set_origin()  argument
287 		   struct dentry *upper)  in ovl_set_origin()
306 	err = ovl_check_setxattr(dentry, upper, OVL_XATTR_ORIGIN, fh,  in ovl_set_origin()
314 static int ovl_set_upper_fh(struct dentry *upper, struct dentry *index)  in ovl_set_upper_fh()
334 static int ovl_create_index(struct dentry *dentry, struct dentry *origin,  in ovl_create_index()  argument
335 			    struct dentry *upper)  in ovl_create_index()
337 	struct dentry *indexdir = ovl_indexdir(dentry->d_sb);  in ovl_create_index()
339 	struct dentry *index = NULL;  in ovl_create_index()
340 	struct dentry *temp = NULL;  in ovl_create_index()
352 	if (WARN_ON(!d_is_dir(dentry)))  in ovl_create_index()
356 	if (WARN_ON(ovl_test_flag(OVL_INDEX, d_inode(dentry))))  in ovl_create_index()
389 	struct dentry *parent;
390 	struct dentry *dentry;  member
395 	struct dentry *destdir;
397 	struct dentry *workdir;
407 	struct dentry *upper;  in ovl_link_up()
408 	struct dentry *upperdir = ovl_dentry_upper(c->parent);  in ovl_link_up()
416 	err = ovl_set_nlink_lower(c->dentry);  in ovl_link_up()
421 	upper = lookup_one_len(c->dentry->d_name.name, upperdir,  in ovl_link_up()
422 			       c->dentry->d_name.len);  in ovl_link_up()
425 		err = ovl_do_link(ovl_dentry_upper(c->dentry), udir, upper);  in ovl_link_up()
431 			ovl_dentry_set_upper_alias(c->dentry);  in ovl_link_up()
438 	err = ovl_set_nlink_upper(c->dentry);  in ovl_link_up()
443 static int ovl_install_temp(struct ovl_copy_up_ctx *c, struct dentry *temp,  in ovl_install_temp()
444 			    struct dentry **newdentry)  in ovl_install_temp()
447 	struct dentry *upper;  in ovl_install_temp()
466 static struct dentry *ovl_get_tmpfile(struct ovl_copy_up_ctx *c)  in ovl_get_tmpfile()
469 	struct dentry *temp;  in ovl_get_tmpfile()
479 	err = security_inode_copy_up(c->dentry, &new_creds);  in ovl_get_tmpfile()
500 static int ovl_copy_up_inode(struct ovl_copy_up_ctx *c, struct dentry *temp)  in ovl_copy_up_inode()
504 	err = ovl_copy_xattr(c->lowerpath.dentry, temp);  in ovl_copy_up_inode()
516 		err = ovl_set_origin(c->dentry, c->lowerpath.dentry, temp);  in ovl_copy_up_inode()
524 		ovl_path_upper(c->dentry, &upperpath);  in ovl_copy_up_inode()
525 		BUG_ON(upperpath.dentry != NULL);  in ovl_copy_up_inode()
526 		upperpath.dentry = temp;  in ovl_copy_up_inode()
528 		ovl_path_lowerdata(c->dentry, &datapath);  in ovl_copy_up_inode()
535 		err = ovl_check_setxattr(c->dentry, temp, OVL_XATTR_METACOPY,  in ovl_copy_up_inode()
555 	struct dentry *newdentry = NULL;  in ovl_copy_up_locked()
556 	struct dentry *temp;  in ovl_copy_up_locked()
568 		err = ovl_create_index(c->dentry, c->lowerpath.dentry, temp);  in ovl_copy_up_locked()
584 		ovl_set_upperdata(d_inode(c->dentry));  in ovl_copy_up_locked()
585 	inode = d_inode(c->dentry);  in ovl_copy_up_locked()
610 	struct ovl_fs *ofs = c->dentry->d_sb->s_fs_info;  in ovl_do_copy_up()
619 	if (ovl_need_index(c->dentry)) {  in ovl_do_copy_up()
622 			c->workdir = ovl_indexdir(c->dentry->d_sb);  in ovl_do_copy_up()
631 		c->destdir = ovl_indexdir(c->dentry->d_sb);  in ovl_do_copy_up()
632 		err = ovl_get_index_name(c->lowerpath.dentry, &c->destname);  in ovl_do_copy_up()
665 		ovl_set_flag(OVL_INDEX, d_inode(c->dentry));  in ovl_do_copy_up()
669 		err = ovl_set_nlink_upper(c->dentry);  in ovl_do_copy_up()
678 		ovl_dentry_set_upper_alias(c->dentry);  in ovl_do_copy_up()
687 static bool ovl_need_meta_copy_up(struct dentry *dentry, umode_t mode,  in ovl_need_meta_copy_up()  argument
690 	struct ovl_fs *ofs = dentry->d_sb->s_fs_info;  in ovl_need_meta_copy_up()
710 	ovl_path_upper(c->dentry, &upperpath);  in ovl_copy_up_meta_inode_data()
711 	if (WARN_ON(upperpath.dentry == NULL))  in ovl_copy_up_meta_inode_data()
714 	ovl_path_lowerdata(c->dentry, &datapath);  in ovl_copy_up_meta_inode_data()
715 	if (WARN_ON(datapath.dentry == NULL))  in ovl_copy_up_meta_inode_data()
722 	err = vfs_removexattr(upperpath.dentry, OVL_XATTR_METACOPY);  in ovl_copy_up_meta_inode_data()
726 	ovl_set_upperdata(d_inode(c->dentry));  in ovl_copy_up_meta_inode_data()
730 static int ovl_copy_up_one(struct dentry *parent, struct dentry *dentry,  in ovl_copy_up_one()  argument
738 		.dentry = dentry,  in ovl_copy_up_one()
739 		.workdir = ovl_workdir(dentry),  in ovl_copy_up_one()
745 	ovl_path_lower(dentry, &ctx.lowerpath);  in ovl_copy_up_one()
751 	ctx.metacopy = ovl_need_meta_copy_up(dentry, ctx.stat.mode, flags);  in ovl_copy_up_one()
755 		ctx.destdir = parentpath.dentry;  in ovl_copy_up_one()
756 		ctx.destname = dentry->d_name;  in ovl_copy_up_one()
770 		ctx.link = vfs_get_link(ctx.lowerpath.dentry, &done);  in ovl_copy_up_one()
775 	err = ovl_copy_up_start(dentry, flags);  in ovl_copy_up_one()
781 		if (!ovl_dentry_upper(dentry))  in ovl_copy_up_one()
783 		if (!err && parent && !ovl_dentry_has_upper_alias(dentry))  in ovl_copy_up_one()
785 		if (!err && ovl_dentry_needs_data_copy_up_locked(dentry, flags))  in ovl_copy_up_one()
787 		ovl_copy_up_end(dentry);  in ovl_copy_up_one()
794 int ovl_copy_up_flags(struct dentry *dentry, int flags)  in ovl_copy_up_flags()  argument
797 	const struct cred *old_cred = ovl_override_creds(dentry->d_sb);  in ovl_copy_up_flags()
798 	bool disconnected = (dentry->d_flags & DCACHE_DISCONNECTED);  in ovl_copy_up_flags()
805 	if (WARN_ON(disconnected && d_is_dir(dentry)))  in ovl_copy_up_flags()
809 		struct dentry *next;  in ovl_copy_up_flags()
810 		struct dentry *parent = NULL;  in ovl_copy_up_flags()
812 		if (ovl_already_copied_up(dentry, flags))  in ovl_copy_up_flags()
815 		next = dget(dentry);  in ovl_copy_up_flags()
837 static bool ovl_open_need_copy_up(struct dentry *dentry, int flags)  in ovl_open_need_copy_up()  argument
840 	if (ovl_already_copied_up(dentry, flags))  in ovl_open_need_copy_up()
843 	if (special_file(d_inode(dentry)->i_mode))  in ovl_open_need_copy_up()
852 int ovl_open_maybe_copy_up(struct dentry *dentry, unsigned int file_flags)  in ovl_open_maybe_copy_up()  argument
856 	if (ovl_open_need_copy_up(dentry, file_flags)) {  in ovl_open_maybe_copy_up()
857 		err = ovl_want_write(dentry);  in ovl_open_maybe_copy_up()
859 			err = ovl_copy_up_flags(dentry, file_flags);  in ovl_open_maybe_copy_up()
860 			ovl_drop_write(dentry);  in ovl_open_maybe_copy_up()
867 int ovl_copy_up_with_data(struct dentry *dentry)  in ovl_copy_up_with_data()  argument
869 	return ovl_copy_up_flags(dentry, O_WRONLY);  in ovl_copy_up_with_data()
872 int ovl_copy_up(struct dentry *dentry)  in ovl_copy_up()  argument
874 	return ovl_copy_up_flags(dentry, 0);  in ovl_copy_up()