CC: [email protected] BCC: [email protected] CC: Linux Memory Management List <[email protected]> TO: Mike Christie <[email protected]> CC: "Martin K. Petersen" <[email protected]> CC: Lee Duncan <[email protected]>
tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: 18ecd30af1a8402c162cca1bd58771c0e5be7815 commit: a01ff1e161ea32d438d94032dd93cf2e4d9caac3 [13298/13468] scsi: iscsi: Remove iscsi_get_task back_lock requirement :::::: branch date: 2 days ago :::::: commit date: 2 days ago config: i386-randconfig-c021 (https://download.01.org/0day-ci/archive/20220522/[email protected]/config) compiler: gcc-11 (Debian 11.3.0-1) 11.3.0 If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot <[email protected]> Reported-by: Julia Lawall <[email protected]> cocci warnings: (new ones prefixed by >>) >> drivers/scsi/libiscsi_tcp.c:563:2-8: preceding lock on line 542 vim +563 drivers/scsi/libiscsi_tcp.c a081c13e39b5c1 Mike Christie 2008-12-02 523 a081c13e39b5c1 Mike Christie 2008-12-02 524 /** a081c13e39b5c1 Mike Christie 2008-12-02 525 * iscsi_tcp_r2t_rsp - iSCSI R2T Response processing a081c13e39b5c1 Mike Christie 2008-12-02 526 * @conn: iscsi connection 5923d64b7ab63d Mike Christie 2021-02-06 527 * @hdr: PDU header a081c13e39b5c1 Mike Christie 2008-12-02 528 */ 5923d64b7ab63d Mike Christie 2021-02-06 529 static int iscsi_tcp_r2t_rsp(struct iscsi_conn *conn, struct iscsi_hdr *hdr) a081c13e39b5c1 Mike Christie 2008-12-02 530 { a081c13e39b5c1 Mike Christie 2008-12-02 531 struct iscsi_session *session = conn->session; 5923d64b7ab63d Mike Christie 2021-02-06 532 struct iscsi_tcp_task *tcp_task; 5923d64b7ab63d Mike Christie 2021-02-06 533 struct iscsi_tcp_conn *tcp_conn; 5923d64b7ab63d Mike Christie 2021-02-06 534 struct iscsi_r2t_rsp *rhdr; a081c13e39b5c1 Mike Christie 2008-12-02 535 struct iscsi_r2t_info *r2t; 5923d64b7ab63d Mike Christie 2021-02-06 536 struct iscsi_task *task; 5d0fddd0a72d30 Shlomo Pongratz 2014-02-07 537 u32 data_length; 5d0fddd0a72d30 Shlomo Pongratz 2014-02-07 538 u32 data_offset; 5923d64b7ab63d Mike Christie 2021-02-06 539 int r2tsn; a081c13e39b5c1 Mike Christie 2008-12-02 540 int rc; a081c13e39b5c1 Mike Christie 2008-12-02 541 5923d64b7ab63d Mike Christie 2021-02-06 @542 spin_lock(&session->back_lock); 5923d64b7ab63d Mike Christie 2021-02-06 543 task = iscsi_itt_to_ctask(conn, hdr->itt); 5923d64b7ab63d Mike Christie 2021-02-06 544 if (!task) { 5923d64b7ab63d Mike Christie 2021-02-06 545 spin_unlock(&session->back_lock); 5923d64b7ab63d Mike Christie 2021-02-06 546 return ISCSI_ERR_BAD_ITT; 5923d64b7ab63d Mike Christie 2021-02-06 547 } else if (task->sc->sc_data_direction != DMA_TO_DEVICE) { 5923d64b7ab63d Mike Christie 2021-02-06 548 spin_unlock(&session->back_lock); 5923d64b7ab63d Mike Christie 2021-02-06 549 return ISCSI_ERR_PROTO; 5923d64b7ab63d Mike Christie 2021-02-06 550 } 5923d64b7ab63d Mike Christie 2021-02-06 551 /* 5923d64b7ab63d Mike Christie 2021-02-06 552 * A bad target might complete the cmd before we have handled R2Ts 5923d64b7ab63d Mike Christie 2021-02-06 553 * so get a ref to the task that will be dropped in the xmit path. 5923d64b7ab63d Mike Christie 2021-02-06 554 */ 5923d64b7ab63d Mike Christie 2021-02-06 555 if (task->state != ISCSI_TASK_RUNNING) { 5923d64b7ab63d Mike Christie 2021-02-06 556 spin_unlock(&session->back_lock); 5923d64b7ab63d Mike Christie 2021-02-06 557 /* Let the path that got the early rsp complete it */ 5923d64b7ab63d Mike Christie 2021-02-06 558 return 0; 5923d64b7ab63d Mike Christie 2021-02-06 559 } 5923d64b7ab63d Mike Christie 2021-02-06 560 task->last_xfer = jiffies; a01ff1e161ea32 Mike Christie 2022-05-18 561 if (!iscsi_get_task(task)) { a01ff1e161ea32 Mike Christie 2022-05-18 562 /* Let the path that got the early rsp complete it */ a01ff1e161ea32 Mike Christie 2022-05-18 @563 return 0; a01ff1e161ea32 Mike Christie 2022-05-18 564 } 5923d64b7ab63d Mike Christie 2021-02-06 565 5923d64b7ab63d Mike Christie 2021-02-06 566 tcp_conn = conn->dd_data; 5923d64b7ab63d Mike Christie 2021-02-06 567 rhdr = (struct iscsi_r2t_rsp *)tcp_conn->in.hdr; 5923d64b7ab63d Mike Christie 2021-02-06 568 /* fill-in new R2T associated with the task */ 5923d64b7ab63d Mike Christie 2021-02-06 569 iscsi_update_cmdsn(session, (struct iscsi_nopin *)rhdr); 5923d64b7ab63d Mike Christie 2021-02-06 570 spin_unlock(&session->back_lock); 5923d64b7ab63d Mike Christie 2021-02-06 571 a081c13e39b5c1 Mike Christie 2008-12-02 572 if (tcp_conn->in.datalen) { a081c13e39b5c1 Mike Christie 2008-12-02 573 iscsi_conn_printk(KERN_ERR, conn, a081c13e39b5c1 Mike Christie 2008-12-02 574 "invalid R2t with datalen %d\n", a081c13e39b5c1 Mike Christie 2008-12-02 575 tcp_conn->in.datalen); 5923d64b7ab63d Mike Christie 2021-02-06 576 rc = ISCSI_ERR_DATALEN; 5923d64b7ab63d Mike Christie 2021-02-06 577 goto put_task; a081c13e39b5c1 Mike Christie 2008-12-02 578 } a081c13e39b5c1 Mike Christie 2008-12-02 579 5923d64b7ab63d Mike Christie 2021-02-06 580 tcp_task = task->dd_data; 5923d64b7ab63d Mike Christie 2021-02-06 581 r2tsn = be32_to_cpu(rhdr->r2tsn); a081c13e39b5c1 Mike Christie 2008-12-02 582 if (tcp_task->exp_datasn != r2tsn){ 0ab1c2529e6a70 Mike Christie 2009-03-05 583 ISCSI_DBG_TCP(conn, "task->exp_datasn(%d) != rhdr->r2tsn(%d)\n", 0ab1c2529e6a70 Mike Christie 2009-03-05 584 tcp_task->exp_datasn, r2tsn); 5923d64b7ab63d Mike Christie 2021-02-06 585 rc = ISCSI_ERR_R2TSN; 5923d64b7ab63d Mike Christie 2021-02-06 586 goto put_task; a081c13e39b5c1 Mike Christie 2008-12-02 587 } a081c13e39b5c1 Mike Christie 2008-12-02 588 5923d64b7ab63d Mike Christie 2021-02-06 589 if (session->state != ISCSI_STATE_LOGGED_IN) { a081c13e39b5c1 Mike Christie 2008-12-02 590 iscsi_conn_printk(KERN_INFO, conn, a081c13e39b5c1 Mike Christie 2008-12-02 591 "dropping R2T itt %d in recovery.\n", a081c13e39b5c1 Mike Christie 2008-12-02 592 task->itt); 5923d64b7ab63d Mike Christie 2021-02-06 593 rc = 0; 5923d64b7ab63d Mike Christie 2021-02-06 594 goto put_task; a081c13e39b5c1 Mike Christie 2008-12-02 595 } a081c13e39b5c1 Mike Christie 2008-12-02 596 5d0fddd0a72d30 Shlomo Pongratz 2014-02-07 597 data_length = be32_to_cpu(rhdr->data_length); 5d0fddd0a72d30 Shlomo Pongratz 2014-02-07 598 if (data_length == 0) { a081c13e39b5c1 Mike Christie 2008-12-02 599 iscsi_conn_printk(KERN_ERR, conn, a081c13e39b5c1 Mike Christie 2008-12-02 600 "invalid R2T with zero data len\n"); 5923d64b7ab63d Mike Christie 2021-02-06 601 rc = ISCSI_ERR_DATALEN; 5923d64b7ab63d Mike Christie 2021-02-06 602 goto put_task; a081c13e39b5c1 Mike Christie 2008-12-02 603 } a081c13e39b5c1 Mike Christie 2008-12-02 604 5d0fddd0a72d30 Shlomo Pongratz 2014-02-07 605 if (data_length > session->max_burst) 0ab1c2529e6a70 Mike Christie 2009-03-05 606 ISCSI_DBG_TCP(conn, "invalid R2T with data len %u and max " 0ab1c2529e6a70 Mike Christie 2009-03-05 607 "burst %u. Attempting to execute request.\n", 5d0fddd0a72d30 Shlomo Pongratz 2014-02-07 608 data_length, session->max_burst); a081c13e39b5c1 Mike Christie 2008-12-02 609 5d0fddd0a72d30 Shlomo Pongratz 2014-02-07 610 data_offset = be32_to_cpu(rhdr->data_offset); ae3d56d81507c3 Christoph Hellwig 2019-01-29 611 if (data_offset + data_length > task->sc->sdb.length) { a081c13e39b5c1 Mike Christie 2008-12-02 612 iscsi_conn_printk(KERN_ERR, conn, a081c13e39b5c1 Mike Christie 2008-12-02 613 "invalid R2T with data len %u at offset %u " 5d0fddd0a72d30 Shlomo Pongratz 2014-02-07 614 "and total length %d\n", data_length, ae3d56d81507c3 Christoph Hellwig 2019-01-29 615 data_offset, task->sc->sdb.length); 5923d64b7ab63d Mike Christie 2021-02-06 616 rc = ISCSI_ERR_DATALEN; 5923d64b7ab63d Mike Christie 2021-02-06 617 goto put_task; a081c13e39b5c1 Mike Christie 2008-12-02 618 } a081c13e39b5c1 Mike Christie 2008-12-02 619 659743b02c4110 Shlomo Pongratz 2014-02-07 620 spin_lock(&tcp_task->pool2queue); 5d0fddd0a72d30 Shlomo Pongratz 2014-02-07 621 rc = kfifo_out(&tcp_task->r2tpool.queue, (void *)&r2t, sizeof(void *)); 5d0fddd0a72d30 Shlomo Pongratz 2014-02-07 622 if (!rc) { 5d0fddd0a72d30 Shlomo Pongratz 2014-02-07 623 iscsi_conn_printk(KERN_ERR, conn, "Could not allocate R2T. " 5d0fddd0a72d30 Shlomo Pongratz 2014-02-07 624 "Target has sent more R2Ts than it " 5d0fddd0a72d30 Shlomo Pongratz 2014-02-07 625 "negotiated for or driver has leaked.\n"); 659743b02c4110 Shlomo Pongratz 2014-02-07 626 spin_unlock(&tcp_task->pool2queue); 5923d64b7ab63d Mike Christie 2021-02-06 627 rc = ISCSI_ERR_PROTO; 5923d64b7ab63d Mike Christie 2021-02-06 628 goto put_task; 5d0fddd0a72d30 Shlomo Pongratz 2014-02-07 629 } 5d0fddd0a72d30 Shlomo Pongratz 2014-02-07 630 5d0fddd0a72d30 Shlomo Pongratz 2014-02-07 631 r2t->exp_statsn = rhdr->statsn; 5d0fddd0a72d30 Shlomo Pongratz 2014-02-07 632 r2t->data_length = data_length; 5d0fddd0a72d30 Shlomo Pongratz 2014-02-07 633 r2t->data_offset = data_offset; 5d0fddd0a72d30 Shlomo Pongratz 2014-02-07 634 a081c13e39b5c1 Mike Christie 2008-12-02 635 r2t->ttt = rhdr->ttt; /* no flip */ a081c13e39b5c1 Mike Christie 2008-12-02 636 r2t->datasn = 0; a081c13e39b5c1 Mike Christie 2008-12-02 637 r2t->sent = 0; a081c13e39b5c1 Mike Christie 2008-12-02 638 a081c13e39b5c1 Mike Christie 2008-12-02 639 tcp_task->exp_datasn = r2tsn + 1; 7acd72eb85f1c7 Stefani Seibold 2009-12-21 640 kfifo_in(&tcp_task->r2tqueue, (void*)&r2t, sizeof(void*)); a081c13e39b5c1 Mike Christie 2008-12-02 641 conn->r2t_pdus_cnt++; 659743b02c4110 Shlomo Pongratz 2014-02-07 642 spin_unlock(&tcp_task->pool2queue); a081c13e39b5c1 Mike Christie 2008-12-02 643 a081c13e39b5c1 Mike Christie 2008-12-02 644 iscsi_requeue_task(task); a081c13e39b5c1 Mike Christie 2008-12-02 645 return 0; 5923d64b7ab63d Mike Christie 2021-02-06 646 5923d64b7ab63d Mike Christie 2021-02-06 647 put_task: 5923d64b7ab63d Mike Christie 2021-02-06 648 iscsi_put_task(task); 5923d64b7ab63d Mike Christie 2021-02-06 649 return rc; a081c13e39b5c1 Mike Christie 2008-12-02 650 } a081c13e39b5c1 Mike Christie 2008-12-02 651 -- 0-DAY CI Kernel Test Service https://01.org/lkp _______________________________________________ kbuild mailing list -- [email protected] To unsubscribe send an email to [email protected]
