84 static int safe_errno(int err)  in safe_errno()  argument
86 	if ((err > 0) || (err < -MAX_ERRNO)) {  in safe_errno()
87 		p9_debug(P9_DEBUG_ERROR, "Invalid error code %d\n", err);  in safe_errno()
90 	return err;  in safe_errno()
338 	int err = 0;  in p9_tag_init()  local
342 		err = PTR_ERR(c->tagpool);  in p9_tag_init()
345 	err = p9_idpool_get(c->tagpool); /* reserve tag 0 */  in p9_tag_init()
346 	if (err < 0) {  in p9_tag_init()
352 	return err;  in p9_tag_init()
452 	int err;  in p9_parse_header()  local
458 	err = p9pdu_readf(pdu, 0, "dbw", &r_size, &r_type, &r_tag);  in p9_parse_header()
459 	if (err)  in p9_parse_header()
480 	return err;  in p9_parse_header()
498 	int err;  in p9_check_errors()  local
501 	err = p9_parse_header(req->rc, NULL, &type, NULL, 0);  in p9_check_errors()
507 	if (err) {  in p9_check_errors()
508 		p9_debug(P9_DEBUG_ERROR, "couldn't parse header %d\n", err);  in p9_check_errors()
509 		return err;  in p9_check_errors()
516 		err = p9pdu_readf(req->rc, c->proto_version, "s?d",  in p9_check_errors()
518 		if (err)  in p9_check_errors()
522 			err = -ecode;  in p9_check_errors()
524 		if (!err || !IS_ERR_VALUE(err)) {  in p9_check_errors()
525 			err = p9_errstr2errno(ename, strlen(ename));  in p9_check_errors()
532 		err = p9pdu_readf(req->rc, c->proto_version, "d", &ecode);  in p9_check_errors()
533 		err = -ecode;  in p9_check_errors()
538 	return err;  in p9_check_errors()
541 	p9_debug(P9_DEBUG_ERROR, "couldn't parse error%d\n", err);  in p9_check_errors()
543 	return err;  in p9_check_errors()
561 	int err;  in p9_check_zc_errors()  local
566 	err = p9_parse_header(req->rc, NULL, &type, NULL, 0);  in p9_check_zc_errors()
572 	if (err) {  in p9_check_zc_errors()
573 		p9_debug(P9_DEBUG_ERROR, "couldn't parse header %d\n", err);  in p9_check_zc_errors()
574 		return err;  in p9_check_zc_errors()
588 			err = -EFAULT;  in p9_check_zc_errors()
595 			err = copy_from_iter(ename + inline_len,  in p9_check_zc_errors()
597 			if (err != len - inline_len) {  in p9_check_zc_errors()
598 				err = -EFAULT;  in p9_check_zc_errors()
603 		err = p9pdu_readf(req->rc, c->proto_version, "s?d",  in p9_check_zc_errors()
605 		if (err)  in p9_check_zc_errors()
609 			err = -ecode;  in p9_check_zc_errors()
611 		if (!err || !IS_ERR_VALUE(err)) {  in p9_check_zc_errors()
612 			err = p9_errstr2errno(ename, strlen(ename));  in p9_check_zc_errors()
619 		err = p9pdu_readf(req->rc, c->proto_version, "d", &ecode);  in p9_check_zc_errors()
620 		err = -ecode;  in p9_check_zc_errors()
624 	return err;  in p9_check_zc_errors()
627 	p9_debug(P9_DEBUG_ERROR, "couldn't parse error%d\n", err);  in p9_check_zc_errors()
628 	return err;  in p9_check_zc_errors()
650 	int err;  in p9_client_flush()  local
652 	err = p9_parse_header(oldreq->tc, NULL, NULL, &oldtag, 1);  in p9_client_flush()
653 	if (err)  in p9_client_flush()
654 		return err;  in p9_client_flush()
678 	int tag, err;  in p9_client_prepare_req()  local
704 	err = p9pdu_vwritef(req->tc, c->proto_version, fmt, ap);  in p9_client_prepare_req()
705 	if (err)  in p9_client_prepare_req()
712 	return ERR_PTR(err);  in p9_client_prepare_req()
728 	int sigpending, err;  in p9_client_rpc()  local
744 	err = c->trans_mod->request(c, req);  in p9_client_rpc()
745 	if (err < 0) {  in p9_client_rpc()
746 		if (err != -ERESTARTSYS && err != -EFAULT)  in p9_client_rpc()
752 	err = wait_event_interruptible(*req->wq,  in p9_client_rpc()
761 	if ((err == -ERESTARTSYS) && (c->status == Connected)  in p9_client_rpc()
770 		err = req->t_err;  in p9_client_rpc()
772 	if ((err == -ERESTARTSYS) && (c->status == Connected)) {  in p9_client_rpc()
782 			err = 0;  in p9_client_rpc()
789 	if (err < 0)  in p9_client_rpc()
792 	err = p9_check_errors(c, req);  in p9_client_rpc()
793 	trace_9p_client_res(c, type, req->rc->tag, err);  in p9_client_rpc()
794 	if (!err)  in p9_client_rpc()
798 	return ERR_PTR(safe_errno(err));  in p9_client_rpc()
821 	int sigpending, err;  in p9_client_zc_rpc()  local
841 	err = c->trans_mod->zc_request(c, req, uidata, uodata,  in p9_client_zc_rpc()
843 	if (err < 0) {  in p9_client_zc_rpc()
844 		if (err == -EIO)  in p9_client_zc_rpc()
846 		if (err != -ERESTARTSYS)  in p9_client_zc_rpc()
851 		err = req->t_err;  in p9_client_zc_rpc()
853 	if ((err == -ERESTARTSYS) && (c->status == Connected)) {  in p9_client_zc_rpc()
863 			err = 0;  in p9_client_zc_rpc()
870 	if (err < 0)  in p9_client_zc_rpc()
873 	err = p9_check_zc_errors(c, req, uidata, in_hdrlen);  in p9_client_zc_rpc()
874 	trace_9p_client_res(c, type, req->rc->tag, err);  in p9_client_zc_rpc()
875 	if (!err)  in p9_client_zc_rpc()
879 	return ERR_PTR(safe_errno(err));  in p9_client_zc_rpc()
933 	int err = 0;  in p9_client_version()  local
961 	err = p9pdu_readf(req->rc, c->proto_version, "ds", &msize, &version);  in p9_client_version()
962 	if (err) {  in p9_client_version()
963 		p9_debug(P9_DEBUG_9P, "version error %d\n", err);  in p9_client_version()
976 		err = -EREMOTEIO;  in p9_client_version()
987 	return err;  in p9_client_version()
992 	int err;  in p9_client_create()  local
996 	err = 0;  in p9_client_create()
1010 	err = p9_tag_init(clnt);  in p9_client_create()
1011 	if (err < 0)  in p9_client_create()
1014 	err = parse_opts(options, clnt);  in p9_client_create()
1015 	if (err < 0)  in p9_client_create()
1022 		err = -EPROTONOSUPPORT;  in p9_client_create()
1030 		err = PTR_ERR(clnt->fidpool);  in p9_client_create()
1037 	err = clnt->trans_mod->create(clnt, dev_name, options);  in p9_client_create()
1038 	if (err)  in p9_client_create()
1044 	err = p9_client_version(clnt);  in p9_client_create()
1045 	if (err)  in p9_client_create()
1060 	return ERR_PTR(err);  in p9_client_create()
1106 	int err = 0;  in p9_client_attach()  local
1116 		err = PTR_ERR(fid);  in p9_client_attach()
1125 		err = PTR_ERR(req);  in p9_client_attach()
1129 	err = p9pdu_readf(req->rc, clnt->proto_version, "Q", &qid);  in p9_client_attach()
1130 	if (err) {  in p9_client_attach()
1147 	return ERR_PTR(err);  in p9_client_attach()
1154 	int err;  in p9_client_walk()  local
1161 	err = 0;  in p9_client_walk()
1167 			err = PTR_ERR(fid);  in p9_client_walk()
1183 		err = PTR_ERR(req);  in p9_client_walk()
1187 	err = p9pdu_readf(req->rc, clnt->proto_version, "R", &nwqids, &wqids);  in p9_client_walk()
1188 	if (err) {  in p9_client_walk()
1198 		err = -ENOENT;  in p9_client_walk()
1225 	return ERR_PTR(err);  in p9_client_walk()
1231 	int err;  in p9_client_open()  local
1240 	err = 0;  in p9_client_open()
1250 		err = PTR_ERR(req);  in p9_client_open()
1254 	err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", &qid, &iounit);  in p9_client_open()
1255 	if (err) {  in p9_client_open()
1270 	return err;  in p9_client_open()
1277 	int err = 0;  in p9_client_create_dotl()  local
1294 		err = PTR_ERR(req);  in p9_client_create_dotl()
1298 	err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", qid, &iounit);  in p9_client_create_dotl()
1299 	if (err) {  in p9_client_create_dotl()
1315 	return err;  in p9_client_create_dotl()
1322 	int err;  in p9_client_fcreate()  local
1330 	err = 0;  in p9_client_fcreate()
1339 		err = PTR_ERR(req);  in p9_client_fcreate()
1343 	err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", &qid, &iounit);  in p9_client_fcreate()
1344 	if (err) {  in p9_client_fcreate()
1360 	return err;  in p9_client_fcreate()
1367 	int err = 0;  in p9_client_symlink()  local
1378 		err = PTR_ERR(req);  in p9_client_symlink()
1382 	err = p9pdu_readf(req->rc, clnt->proto_version, "Q", qid);  in p9_client_symlink()
1383 	if (err) {  in p9_client_symlink()
1394 	return err;  in p9_client_symlink()
1419 	int err;  in p9_client_fsync()  local
1425 	err = 0;  in p9_client_fsync()
1430 		err = PTR_ERR(req);  in p9_client_fsync()
1439 	return err;  in p9_client_fsync()
1445 	int err;  in p9_client_clunk()  local
1460 	err = 0;  in p9_client_clunk()
1465 		err = PTR_ERR(req);  in p9_client_clunk()
1478 	if (err == -ERESTARTSYS) {  in p9_client_clunk()
1483 	return err;  in p9_client_clunk()
1489 	int err;  in p9_client_remove()  local
1494 	err = 0;  in p9_client_remove()
1499 		err = PTR_ERR(req);  in p9_client_remove()
1507 	if (err == -ERESTARTSYS)  in p9_client_remove()
1511 	return err;  in p9_client_remove()
1517 	int err = 0;  in p9_client_unlinkat()  local
1527 		err = PTR_ERR(req);  in p9_client_unlinkat()
1534 	return err;  in p9_client_unlinkat()
1539 p9_client_read(struct p9_fid *fid, u64 offset, struct iov_iter *to, int *err)  in p9_client_read()  argument
1544 	*err = 0;  in p9_client_read()
1576 			*err = PTR_ERR(req);  in p9_client_read()
1580 		*err = p9pdu_readf(req->rc, clnt->proto_version,  in p9_client_read()
1582 		if (*err) {  in p9_client_read()
1603 				*err = -EFAULT;  in p9_client_read()
1619 p9_client_write(struct p9_fid *fid, u64 offset, struct iov_iter *from, int *err)  in p9_client_write()  argument
1624 	*err = 0;  in p9_client_write()
1649 			*err = PTR_ERR(req);  in p9_client_write()
1653 		*err = p9pdu_readf(req->rc, clnt->proto_version, "d", &count);  in p9_client_write()
1654 		if (*err) {  in p9_client_write()
1677 	int err;  in p9_client_stat()  local
1688 	err = 0;  in p9_client_stat()
1693 		err = PTR_ERR(req);  in p9_client_stat()
1697 	err = p9pdu_readf(req->rc, clnt->proto_version, "wS", &ignored, ret);  in p9_client_stat()
1698 	if (err) {  in p9_client_stat()
1722 	return ERR_PTR(err);  in p9_client_stat()
1729 	int err;  in p9_client_getattr_dotl()  local
1741 	err = 0;  in p9_client_getattr_dotl()
1746 		err = PTR_ERR(req);  in p9_client_getattr_dotl()
1750 	err = p9pdu_readf(req->rc, clnt->proto_version, "A", ret);  in p9_client_getattr_dotl()
1751 	if (err) {  in p9_client_getattr_dotl()
1783 	return ERR_PTR(err);  in p9_client_getattr_dotl()
1818 	int err;  in p9_client_wstat()  local
1822 	err = 0;  in p9_client_wstat()
1841 		err = PTR_ERR(req);  in p9_client_wstat()
1849 	return err;  in p9_client_wstat()
1855 	int err;  in p9_client_setattr()  local
1859 	err = 0;  in p9_client_setattr()
1875 		err = PTR_ERR(req);  in p9_client_setattr()
1881 	return err;  in p9_client_setattr()
1887 	int err;  in p9_client_statfs()  local
1891 	err = 0;  in p9_client_statfs()
1898 		err = PTR_ERR(req);  in p9_client_statfs()
1902 	err = p9pdu_readf(req->rc, clnt->proto_version, "ddqqqqqqd", &sb->type,  in p9_client_statfs()
1905 	if (err) {  in p9_client_statfs()
1920 	return err;  in p9_client_statfs()
1927 	int err;  in p9_client_rename()  local
1931 	err = 0;  in p9_client_rename()
1940 		err = PTR_ERR(req);  in p9_client_rename()
1948 	return err;  in p9_client_rename()
1955 	int err;  in p9_client_renameat()  local
1959 	err = 0;  in p9_client_renameat()
1969 		err = PTR_ERR(req);  in p9_client_renameat()
1978 	return err;  in p9_client_renameat()
1988 	int err;  in p9_client_xattrwalk()  local
1993 	err = 0;  in p9_client_xattrwalk()
1997 		err = PTR_ERR(attr_fid);  in p9_client_xattrwalk()
2008 		err = PTR_ERR(req);  in p9_client_xattrwalk()
2011 	err = p9pdu_readf(req->rc, clnt->proto_version, "q", attr_size);  in p9_client_xattrwalk()
2012 	if (err) {  in p9_client_xattrwalk()
2028 	return ERR_PTR(err);  in p9_client_xattrwalk()
2035 	int err;  in p9_client_xattrcreate()  local
2042 	err = 0;  in p9_client_xattrcreate()
2047 		err = PTR_ERR(req);  in p9_client_xattrcreate()
2053 	return err;  in p9_client_xattrcreate()
2059 	int err, rsize, non_zc = 0;  in p9_client_readdir()  local
2071 	err = 0;  in p9_client_readdir()
2095 		err = PTR_ERR(req);  in p9_client_readdir()
2099 	err = p9pdu_readf(req->rc, clnt->proto_version, "D", &count, &dataptr);  in p9_client_readdir()
2100 	if (err) {  in p9_client_readdir()
2116 	return err;  in p9_client_readdir()
2123 	int err;  in p9_client_mknod_dotl()  local
2127 	err = 0;  in p9_client_mknod_dotl()
2136 	err = p9pdu_readf(req->rc, clnt->proto_version, "Q", qid);  in p9_client_mknod_dotl()
2137 	if (err) {  in p9_client_mknod_dotl()
2146 	return err;  in p9_client_mknod_dotl()
2154 	int err;  in p9_client_mkdir_dotl()  local
2158 	err = 0;  in p9_client_mkdir_dotl()
2167 	err = p9pdu_readf(req->rc, clnt->proto_version, "Q", qid);  in p9_client_mkdir_dotl()
2168 	if (err) {  in p9_client_mkdir_dotl()
2177 	return err;  in p9_client_mkdir_dotl()
2184 	int err;  in p9_client_lock_dotl()  local
2188 	err = 0;  in p9_client_lock_dotl()
2202 	err = p9pdu_readf(req->rc, clnt->proto_version, "b", status);  in p9_client_lock_dotl()
2203 	if (err) {  in p9_client_lock_dotl()
2210 	return err;  in p9_client_lock_dotl()
2217 	int err;  in p9_client_getlock_dotl()  local
2221 	err = 0;  in p9_client_getlock_dotl()
2233 	err = p9pdu_readf(req->rc, clnt->proto_version, "bqqds", &glock->type,  in p9_client_getlock_dotl()
2236 	if (err) {  in p9_client_getlock_dotl()
2245 	return err;  in p9_client_getlock_dotl()
2251 	int err;  in p9_client_readlink()  local
2255 	err = 0;  in p9_client_readlink()
2263 	err = p9pdu_readf(req->rc, clnt->proto_version, "s", target);  in p9_client_readlink()
2264 	if (err) {  in p9_client_readlink()
2271 	return err;  in p9_client_readlink()