From patchwork Mon Jun 29 07:20:04 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hannes Reinecke X-Patchwork-Id: 213666 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-10.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id D65C6C433E0 for ; Mon, 29 Jun 2020 19:11:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id AFE3C206E9 for ; Mon, 29 Jun 2020 19:11:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731079AbgF2TLa (ORCPT ); Mon, 29 Jun 2020 15:11:30 -0400 Received: from mx2.suse.de ([195.135.220.15]:53724 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731064AbgF2TL2 (ORCPT ); Mon, 29 Jun 2020 15:11:28 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id 1F0B9B084; Mon, 29 Jun 2020 07:20:56 +0000 (UTC) From: Hannes Reinecke To: "Martin K. Petersen" Cc: Christoph Hellwig , James Bottomley , Bart van Assche , Don Brace , John Garry , linux-scsi@vger.kernel.org, Hannes Reinecke Subject: [PATCH 05/22] fnic: use scsi_host_busy_iter() to traverse commands Date: Mon, 29 Jun 2020 09:20:04 +0200 Message-Id: <20200629072021.9864-6-hare@suse.de> X-Mailer: git-send-email 2.16.4 In-Reply-To: <20200629072021.9864-1-hare@suse.de> References: <20200629072021.9864-1-hare@suse.de> Sender: linux-scsi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org Use scsi_host_busy_iter() to traverse commands instead of hand-crafted routines walking the command list. Signed-off-by: Hannes Reinecke --- drivers/scsi/fnic/fnic_scsi.c | 801 +++++++++++++++++++----------------------- 1 file changed, 356 insertions(+), 445 deletions(-) diff --git a/drivers/scsi/fnic/fnic_scsi.c b/drivers/scsi/fnic/fnic_scsi.c index 98bf21203230..04879ced2835 100644 --- a/drivers/scsi/fnic/fnic_scsi.c +++ b/drivers/scsi/fnic/fnic_scsi.c @@ -1359,91 +1359,90 @@ int fnic_wq_copy_cmpl_handler(struct fnic *fnic, int copy_work_to_do) return wq_work_done; } -static void fnic_cleanup_io(struct fnic *fnic) +static bool fnic_cleanup_io_iter(struct scsi_cmnd *sc, void *data, + bool reserved) { - int i; + struct fnic *fnic = data; struct fnic_io_req *io_req; unsigned long flags = 0; - struct scsi_cmnd *sc; spinlock_t *io_lock; unsigned long start_time = 0; struct fnic_stats *fnic_stats = &fnic->fnic_stats; - for (i = 0; i < fnic->fnic_max_tag_id; i++) { - io_lock = fnic_io_lock_tag(fnic, i); - spin_lock_irqsave(io_lock, flags); - sc = scsi_host_find_tag(fnic->lport->host, i); - if (!sc) { - spin_unlock_irqrestore(io_lock, flags); - continue; - } + io_lock = fnic_io_lock_tag(fnic, sc->request->tag); + spin_lock_irqsave(io_lock, flags); - io_req = (struct fnic_io_req *)CMD_SP(sc); - if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) && - !(CMD_FLAGS(sc) & FNIC_DEV_RST_DONE)) { - /* - * We will be here only when FW completes reset - * without sending completions for outstanding ios. - */ - CMD_FLAGS(sc) |= FNIC_DEV_RST_DONE; - if (io_req && io_req->dr_done) - complete(io_req->dr_done); - else if (io_req && io_req->abts_done) - complete(io_req->abts_done); - spin_unlock_irqrestore(io_lock, flags); - continue; - } else if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) { - spin_unlock_irqrestore(io_lock, flags); - continue; - } - if (!io_req) { - spin_unlock_irqrestore(io_lock, flags); - goto cleanup_scsi_cmd; - } + io_req = (struct fnic_io_req *)CMD_SP(sc); + if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) && + !(CMD_FLAGS(sc) & FNIC_DEV_RST_DONE)) { + /* + * We will be here only when FW completes reset + * without sending completions for outstanding ios. + */ + CMD_FLAGS(sc) |= FNIC_DEV_RST_DONE; + if (io_req && io_req->dr_done) + complete(io_req->dr_done); + else if (io_req && io_req->abts_done) + complete(io_req->abts_done); + spin_unlock_irqrestore(io_lock, flags); + return true; + } else if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) { + spin_unlock_irqrestore(io_lock, flags); + return true; + } + if (!io_req) { + spin_unlock_irqrestore(io_lock, flags); + goto cleanup_scsi_cmd; + } - CMD_SP(sc) = NULL; + CMD_SP(sc) = NULL; - spin_unlock_irqrestore(io_lock, flags); + spin_unlock_irqrestore(io_lock, flags); - /* - * If there is a scsi_cmnd associated with this io_req, then - * free the corresponding state - */ - start_time = io_req->start_time; - fnic_release_ioreq_buf(fnic, io_req, sc); - mempool_free(io_req, fnic->io_req_pool); + /* + * If there is a scsi_cmnd associated with this io_req, then + * free the corresponding state + */ + start_time = io_req->start_time; + fnic_release_ioreq_buf(fnic, io_req, sc); + mempool_free(io_req, fnic->io_req_pool); cleanup_scsi_cmd: - sc->result = DID_TRANSPORT_DISRUPTED << 16; - FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, - "%s: tag:0x%x : sc:0x%p duration = %lu DID_TRANSPORT_DISRUPTED\n", - __func__, sc->request->tag, sc, - (jiffies - start_time)); - - if (atomic64_read(&fnic->io_cmpl_skip)) - atomic64_dec(&fnic->io_cmpl_skip); - else - atomic64_inc(&fnic_stats->io_stats.io_completions); + sc->result = DID_TRANSPORT_DISRUPTED << 16; + FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, + "fnic_cleanup_io: tag:0x%x : sc:0x%p duration = %lu DID_TRANSPORT_DISRUPTED\n", + sc->request->tag, sc, (jiffies - start_time)); - /* Complete the command to SCSI */ - if (sc->scsi_done) { - if (!(CMD_FLAGS(sc) & FNIC_IO_ISSUED)) - shost_printk(KERN_ERR, fnic->lport->host, - "Calling done for IO not issued to fw: tag:0x%x sc:0x%p\n", - sc->request->tag, sc); + if (atomic64_read(&fnic->io_cmpl_skip)) + atomic64_dec(&fnic->io_cmpl_skip); + else + atomic64_inc(&fnic_stats->io_stats.io_completions); - FNIC_TRACE(fnic_cleanup_io, - sc->device->host->host_no, i, sc, - jiffies_to_msecs(jiffies - start_time), - 0, ((u64)sc->cmnd[0] << 32 | - (u64)sc->cmnd[2] << 24 | - (u64)sc->cmnd[3] << 16 | - (u64)sc->cmnd[4] << 8 | sc->cmnd[5]), - (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); + /* Complete the command to SCSI */ + if (sc->scsi_done) { + if (!(CMD_FLAGS(sc) & FNIC_IO_ISSUED)) + shost_printk(KERN_ERR, fnic->lport->host, + "Calling done for IO not issued to fw: tag:0x%x sc:0x%p\n", + sc->request->tag, sc); + + FNIC_TRACE(fnic_cleanup_io, + sc->device->host->host_no, sc->request->tag, sc, + jiffies_to_msecs(jiffies - start_time), + 0, ((u64)sc->cmnd[0] << 32 | + (u64)sc->cmnd[2] << 24 | + (u64)sc->cmnd[3] << 16 | + (u64)sc->cmnd[4] << 8 | sc->cmnd[5]), + (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); - sc->scsi_done(sc); - } + sc->scsi_done(sc); } + return true; +} + +static void fnic_cleanup_io(struct fnic *fnic) +{ + scsi_host_busy_iter(fnic->lport->host, + fnic_cleanup_io_iter, fnic); } void fnic_wq_copy_cleanup_handler(struct vnic_wq_copy *wq, @@ -1554,143 +1553,140 @@ static inline int fnic_queue_abort_io_req(struct fnic *fnic, int tag, return 0; } -static void fnic_rport_exch_reset(struct fnic *fnic, u32 port_id) +struct fnic_rport_abort_io_iter_data { + struct fnic *fnic; + u32 port_id; + int term_cnt; +}; + +static bool fnic_rport_abort_io(struct scsi_cmnd *sc, void *data, bool reserved) { - int tag; - int abt_tag; - int term_cnt = 0; + struct fnic_rport_abort_io_iter_data *iter_data = data; + struct fnic *fnic = iter_data->fnic; + int abt_tag = sc->request->tag; struct fnic_io_req *io_req; spinlock_t *io_lock; unsigned long flags; - struct scsi_cmnd *sc; struct reset_stats *reset_stats = &fnic->fnic_stats.reset_stats; struct terminate_stats *term_stats = &fnic->fnic_stats.term_stats; struct scsi_lun fc_lun; enum fnic_ioreq_state old_ioreq_state; - FNIC_SCSI_DBG(KERN_DEBUG, - fnic->lport->host, - "fnic_rport_exch_reset called portid 0x%06x\n", - port_id); - - if (fnic->in_remove) - return; - - for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) { - abt_tag = tag; - io_lock = fnic_io_lock_tag(fnic, tag); - spin_lock_irqsave(io_lock, flags); - sc = scsi_host_find_tag(fnic->lport->host, tag); - if (!sc) { - spin_unlock_irqrestore(io_lock, flags); - continue; - } + io_lock = fnic_io_lock_tag(fnic, abt_tag); + spin_lock_irqsave(io_lock, flags); - io_req = (struct fnic_io_req *)CMD_SP(sc); + io_req = (struct fnic_io_req *)CMD_SP(sc); - if (!io_req || io_req->port_id != port_id) { - spin_unlock_irqrestore(io_lock, flags); - continue; - } + if (!io_req || io_req->port_id != iter_data->port_id) { + spin_unlock_irqrestore(io_lock, flags); + return true; + } - if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) && - (!(CMD_FLAGS(sc) & FNIC_DEV_RST_ISSUED))) { - FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, + if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) && + (!(CMD_FLAGS(sc) & FNIC_DEV_RST_ISSUED))) { + FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "fnic_rport_exch_reset dev rst not pending sc 0x%p\n", sc); - spin_unlock_irqrestore(io_lock, flags); - continue; - } + spin_unlock_irqrestore(io_lock, flags); + return true; + } - /* - * Found IO that is still pending with firmware and - * belongs to rport that went away - */ - if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) { - spin_unlock_irqrestore(io_lock, flags); - continue; - } - if (io_req->abts_done) { - shost_printk(KERN_ERR, fnic->lport->host, + /* + * Found IO that is still pending with firmware and + * belongs to rport that went away + */ + if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) { + spin_unlock_irqrestore(io_lock, flags); + return true; + } + if (io_req->abts_done) { + shost_printk(KERN_ERR, fnic->lport->host, "fnic_rport_exch_reset: io_req->abts_done is set " "state is %s\n", fnic_ioreq_state_to_str(CMD_STATE(sc))); - } + } - if (!(CMD_FLAGS(sc) & FNIC_IO_ISSUED)) { - shost_printk(KERN_ERR, fnic->lport->host, - "rport_exch_reset " - "IO not yet issued %p tag 0x%x flags " - "%x state %d\n", - sc, tag, CMD_FLAGS(sc), CMD_STATE(sc)); - } - old_ioreq_state = CMD_STATE(sc); - CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING; - CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE; - if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) { - atomic64_inc(&reset_stats->device_reset_terminates); - abt_tag = (tag | FNIC_TAG_DEV_RST); - FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, - "fnic_rport_exch_reset dev rst sc 0x%p\n", - sc); - } + if (!(CMD_FLAGS(sc) & FNIC_IO_ISSUED)) { + shost_printk(KERN_ERR, fnic->lport->host, + "rport_exch_reset " + "IO not yet issued %p tag 0x%x flags " + "%x state %d\n", + sc, abt_tag, CMD_FLAGS(sc), CMD_STATE(sc)); + } + old_ioreq_state = CMD_STATE(sc); + CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING; + CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE; + if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) { + atomic64_inc(&reset_stats->device_reset_terminates); + abt_tag |= FNIC_TAG_DEV_RST; + } + FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, + "fnic_rport_exch_reset dev rst sc 0x%p\n", sc); + BUG_ON(io_req->abts_done); - BUG_ON(io_req->abts_done); + FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, + "fnic_rport_reset_exch: Issuing abts\n"); - FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, - "fnic_rport_reset_exch: Issuing abts\n"); + spin_unlock_irqrestore(io_lock, flags); + + /* Now queue the abort command to firmware */ + int_to_scsilun(sc->device->lun, &fc_lun); + if (fnic_queue_abort_io_req(fnic, abt_tag, + FCPIO_ITMF_ABT_TASK_TERM, + fc_lun.scsi_lun, io_req)) { + /* + * Revert the cmd state back to old state, if + * it hasn't changed in between. This cmd will get + * aborted later by scsi_eh, or cleaned up during + * lun reset + */ + spin_lock_irqsave(io_lock, flags); + if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) + CMD_STATE(sc) = old_ioreq_state; spin_unlock_irqrestore(io_lock, flags); + } else { + spin_lock_irqsave(io_lock, flags); + if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) + CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED; + else + CMD_FLAGS(sc) |= FNIC_IO_INTERNAL_TERM_ISSUED; + spin_unlock_irqrestore(io_lock, flags); + atomic64_inc(&term_stats->terminates); + iter_data->term_cnt++; + } + return true; +} - /* Now queue the abort command to firmware */ - int_to_scsilun(sc->device->lun, &fc_lun); +static void fnic_rport_exch_reset(struct fnic *fnic, u32 port_id) +{ + struct terminate_stats *term_stats = &fnic->fnic_stats.term_stats; + struct fnic_rport_abort_io_iter_data iter_data = { + .fnic = fnic, + .port_id = port_id, + .term_cnt = 0, + }; - if (fnic_queue_abort_io_req(fnic, abt_tag, - FCPIO_ITMF_ABT_TASK_TERM, - fc_lun.scsi_lun, io_req)) { - /* - * Revert the cmd state back to old state, if - * it hasn't changed in between. This cmd will get - * aborted later by scsi_eh, or cleaned up during - * lun reset - */ - spin_lock_irqsave(io_lock, flags); - if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) - CMD_STATE(sc) = old_ioreq_state; - spin_unlock_irqrestore(io_lock, flags); - } else { - spin_lock_irqsave(io_lock, flags); - if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) - CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED; - else - CMD_FLAGS(sc) |= FNIC_IO_INTERNAL_TERM_ISSUED; - spin_unlock_irqrestore(io_lock, flags); - atomic64_inc(&term_stats->terminates); - term_cnt++; - } - } - if (term_cnt > atomic64_read(&term_stats->max_terminates)) - atomic64_set(&term_stats->max_terminates, term_cnt); + FNIC_SCSI_DBG(KERN_DEBUG, + fnic->lport->host, + "fnic_rport_exch_reset called portid 0x%06x\n", + port_id); + + if (fnic->in_remove) + return; + + scsi_host_busy_iter(fnic->lport->host, fnic_rport_abort_io, + &iter_data); + if (iter_data.term_cnt > atomic64_read(&term_stats->max_terminates)) + atomic64_set(&term_stats->max_terminates, iter_data.term_cnt); } void fnic_terminate_rport_io(struct fc_rport *rport) { - int tag; - int abt_tag; - int term_cnt = 0; - struct fnic_io_req *io_req; - spinlock_t *io_lock; - unsigned long flags; - struct scsi_cmnd *sc; - struct scsi_lun fc_lun; struct fc_rport_libfc_priv *rdata; struct fc_lport *lport; struct fnic *fnic; - struct fc_rport *cmd_rport; - struct reset_stats *reset_stats; - struct terminate_stats *term_stats; - enum fnic_ioreq_state old_ioreq_state; if (!rport) { printk(KERN_ERR "fnic_terminate_rport_io: rport is NULL\n"); @@ -1718,109 +1714,7 @@ void fnic_terminate_rport_io(struct fc_rport *rport) if (fnic->in_remove) return; - reset_stats = &fnic->fnic_stats.reset_stats; - term_stats = &fnic->fnic_stats.term_stats; - - for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) { - abt_tag = tag; - io_lock = fnic_io_lock_tag(fnic, tag); - spin_lock_irqsave(io_lock, flags); - sc = scsi_host_find_tag(fnic->lport->host, tag); - if (!sc) { - spin_unlock_irqrestore(io_lock, flags); - continue; - } - - cmd_rport = starget_to_rport(scsi_target(sc->device)); - if (rport != cmd_rport) { - spin_unlock_irqrestore(io_lock, flags); - continue; - } - - io_req = (struct fnic_io_req *)CMD_SP(sc); - - if (!io_req || rport != cmd_rport) { - spin_unlock_irqrestore(io_lock, flags); - continue; - } - - if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) && - (!(CMD_FLAGS(sc) & FNIC_DEV_RST_ISSUED))) { - FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, - "fnic_terminate_rport_io dev rst not pending sc 0x%p\n", - sc); - spin_unlock_irqrestore(io_lock, flags); - continue; - } - /* - * Found IO that is still pending with firmware and - * belongs to rport that went away - */ - if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) { - spin_unlock_irqrestore(io_lock, flags); - continue; - } - if (io_req->abts_done) { - shost_printk(KERN_ERR, fnic->lport->host, - "fnic_terminate_rport_io: io_req->abts_done is set " - "state is %s\n", - fnic_ioreq_state_to_str(CMD_STATE(sc))); - } - if (!(CMD_FLAGS(sc) & FNIC_IO_ISSUED)) { - FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, - "fnic_terminate_rport_io " - "IO not yet issued %p tag 0x%x flags " - "%x state %d\n", - sc, tag, CMD_FLAGS(sc), CMD_STATE(sc)); - } - old_ioreq_state = CMD_STATE(sc); - CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING; - CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE; - if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) { - atomic64_inc(&reset_stats->device_reset_terminates); - abt_tag = (tag | FNIC_TAG_DEV_RST); - FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, - "fnic_terminate_rport_io dev rst sc 0x%p\n", sc); - } - - BUG_ON(io_req->abts_done); - - FNIC_SCSI_DBG(KERN_DEBUG, - fnic->lport->host, - "fnic_terminate_rport_io: Issuing abts\n"); - - spin_unlock_irqrestore(io_lock, flags); - - /* Now queue the abort command to firmware */ - int_to_scsilun(sc->device->lun, &fc_lun); - - if (fnic_queue_abort_io_req(fnic, abt_tag, - FCPIO_ITMF_ABT_TASK_TERM, - fc_lun.scsi_lun, io_req)) { - /* - * Revert the cmd state back to old state, if - * it hasn't changed in between. This cmd will get - * aborted later by scsi_eh, or cleaned up during - * lun reset - */ - spin_lock_irqsave(io_lock, flags); - if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) - CMD_STATE(sc) = old_ioreq_state; - spin_unlock_irqrestore(io_lock, flags); - } else { - spin_lock_irqsave(io_lock, flags); - if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) - CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED; - else - CMD_FLAGS(sc) |= FNIC_IO_INTERNAL_TERM_ISSUED; - spin_unlock_irqrestore(io_lock, flags); - atomic64_inc(&term_stats->terminates); - term_cnt++; - } - } - if (term_cnt > atomic64_read(&term_stats->max_terminates)) - atomic64_set(&term_stats->max_terminates, term_cnt); - + fnic_rport_exch_reset(fnic, rport->port_id); } /* @@ -2115,163 +2009,174 @@ static inline int fnic_queue_dr_io_req(struct fnic *fnic, return ret; } -/* - * Clean up any pending aborts on the lun - * For each outstanding IO on this lun, whose abort is not completed by fw, - * issue a local abort. Wait for abort to complete. Return 0 if all commands - * successfully aborted, 1 otherwise - */ -static int fnic_clean_pending_aborts(struct fnic *fnic, - struct scsi_cmnd *lr_sc) +struct fnic_pending_aborts_iter_data { + struct fnic *fnic; + struct scsi_device *lun_dev; + int ret; +}; + +static bool fnic_pending_aborts_iter(struct scsi_cmnd *sc, + void *data, bool reserved) { - int tag, abt_tag; + struct fnic_pending_aborts_iter_data *iter_data = data; + struct fnic *fnic = iter_data->fnic; + struct scsi_device *lun_dev = iter_data->lun_dev; + int abt_tag = sc->request->tag; struct fnic_io_req *io_req; spinlock_t *io_lock; unsigned long flags; - int ret = 0; - struct scsi_cmnd *sc; struct scsi_lun fc_lun; - struct scsi_device *lun_dev = lr_sc->device; DECLARE_COMPLETION_ONSTACK(tm_done); enum fnic_ioreq_state old_ioreq_state; - for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) { - io_lock = fnic_io_lock_tag(fnic, tag); - spin_lock_irqsave(io_lock, flags); - sc = scsi_host_find_tag(fnic->lport->host, tag); - /* - * ignore this lun reset cmd if issued using new SC - * or cmds that do not belong to this lun - */ - if (!sc || sc == lr_sc || sc->device != lun_dev) { - spin_unlock_irqrestore(io_lock, flags); - continue; - } - - io_req = (struct fnic_io_req *)CMD_SP(sc); - - if (!io_req || sc->device != lun_dev) { - spin_unlock_irqrestore(io_lock, flags); - continue; - } - - /* - * Found IO that is still pending with firmware and - * belongs to the LUN that we are resetting - */ - FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, - "Found IO in %s on lun\n", - fnic_ioreq_state_to_str(CMD_STATE(sc))); + if (sc->device != lun_dev) + return true; + if (reserved) + return true; - if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) { - spin_unlock_irqrestore(io_lock, flags); - continue; - } - if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) && - (!(CMD_FLAGS(sc) & FNIC_DEV_RST_ISSUED))) { - FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, - "%s dev rst not pending sc 0x%p\n", __func__, - sc); - spin_unlock_irqrestore(io_lock, flags); - continue; - } + io_lock = fnic_io_lock_tag(fnic, abt_tag); + spin_lock_irqsave(io_lock, flags); + io_req = (struct fnic_io_req *)CMD_SP(sc); + if (!io_req) { + spin_unlock_irqrestore(io_lock, flags); + return true; + } - if (io_req->abts_done) - shost_printk(KERN_ERR, fnic->lport->host, - "%s: io_req->abts_done is set state is %s\n", - __func__, fnic_ioreq_state_to_str(CMD_STATE(sc))); - old_ioreq_state = CMD_STATE(sc); - /* - * Any pending IO issued prior to reset is expected to be - * in abts pending state, if not we need to set - * FNIC_IOREQ_ABTS_PENDING to indicate the IO is abort pending. - * When IO is completed, the IO will be handed over and - * handled in this function. - */ - CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING; + /* + * Found IO that is still pending with firmware and + * belongs to the LUN that we are resetting + */ + FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, + "Found IO in %s on lun\n", + fnic_ioreq_state_to_str(CMD_STATE(sc))); - BUG_ON(io_req->abts_done); + if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) { + spin_unlock_irqrestore(io_lock, flags); + return true; + } + if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) && + (!(CMD_FLAGS(sc) & FNIC_DEV_RST_ISSUED))) { + FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, + "%s dev rst not pending sc 0x%p\n", __func__, + sc); + spin_unlock_irqrestore(io_lock, flags); + return true; + } - abt_tag = tag; - if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) { - abt_tag |= FNIC_TAG_DEV_RST; - FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, - "%s: dev rst sc 0x%p\n", __func__, sc); - } + if (io_req->abts_done) + shost_printk(KERN_ERR, fnic->lport->host, + "%s: io_req->abts_done is set state is %s\n", + __func__, fnic_ioreq_state_to_str(CMD_STATE(sc))); + old_ioreq_state = CMD_STATE(sc); + /* + * Any pending IO issued prior to reset is expected to be + * in abts pending state, if not we need to set + * FNIC_IOREQ_ABTS_PENDING to indicate the IO is abort pending. + * When IO is completed, the IO will be handed over and + * handled in this function. + */ + CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING; - CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE; - io_req->abts_done = &tm_done; - spin_unlock_irqrestore(io_lock, flags); + BUG_ON(io_req->abts_done); - /* Now queue the abort command to firmware */ - int_to_scsilun(sc->device->lun, &fc_lun); + if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) { + abt_tag |= FNIC_TAG_DEV_RST; + FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, + "%s: dev rst sc 0x%p\n", __func__, sc); + } - if (fnic_queue_abort_io_req(fnic, abt_tag, - FCPIO_ITMF_ABT_TASK_TERM, - fc_lun.scsi_lun, io_req)) { - spin_lock_irqsave(io_lock, flags); - io_req = (struct fnic_io_req *)CMD_SP(sc); - if (io_req) - io_req->abts_done = NULL; - if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) - CMD_STATE(sc) = old_ioreq_state; - spin_unlock_irqrestore(io_lock, flags); - ret = 1; - goto clean_pending_aborts_end; - } else { - spin_lock_irqsave(io_lock, flags); - if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) - CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED; - spin_unlock_irqrestore(io_lock, flags); - } - CMD_FLAGS(sc) |= FNIC_IO_INTERNAL_TERM_ISSUED; + CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE; + io_req->abts_done = &tm_done; + spin_unlock_irqrestore(io_lock, flags); - wait_for_completion_timeout(&tm_done, - msecs_to_jiffies - (fnic->config.ed_tov)); + /* Now queue the abort command to firmware */ + int_to_scsilun(sc->device->lun, &fc_lun); - /* Recheck cmd state to check if it is now aborted */ + if (fnic_queue_abort_io_req(fnic, abt_tag, + FCPIO_ITMF_ABT_TASK_TERM, + fc_lun.scsi_lun, io_req)) { spin_lock_irqsave(io_lock, flags); io_req = (struct fnic_io_req *)CMD_SP(sc); - if (!io_req) { - spin_unlock_irqrestore(io_lock, flags); - CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_REQ_NULL; - continue; - } + if (io_req) + io_req->abts_done = NULL; + if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) + CMD_STATE(sc) = old_ioreq_state; + spin_unlock_irqrestore(io_lock, flags); + return false; + } else { + spin_lock_irqsave(io_lock, flags); + if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) + CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED; + spin_unlock_irqrestore(io_lock, flags); + } + CMD_FLAGS(sc) |= FNIC_IO_INTERNAL_TERM_ISSUED; - io_req->abts_done = NULL; + wait_for_completion_timeout(&tm_done, msecs_to_jiffies + (fnic->config.ed_tov)); - /* if abort is still pending with fw, fail */ - if (CMD_ABTS_STATUS(sc) == FCPIO_INVALID_CODE) { - spin_unlock_irqrestore(io_lock, flags); - CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_DONE; - ret = 1; - goto clean_pending_aborts_end; - } - CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE; + /* Recheck cmd state to check if it is now aborted */ + spin_lock_irqsave(io_lock, flags); + io_req = (struct fnic_io_req *)CMD_SP(sc); + if (!io_req) { + spin_unlock_irqrestore(io_lock, flags); + CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_REQ_NULL; + return true; + } - /* original sc used for lr is handled by dev reset code */ - if (sc != lr_sc) - CMD_SP(sc) = NULL; + io_req->abts_done = NULL; + + /* if abort is still pending with fw, fail */ + if (CMD_ABTS_STATUS(sc) == FCPIO_INVALID_CODE) { spin_unlock_irqrestore(io_lock, flags); + CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_DONE; + iter_data->ret = FAILED; + return false; + } + CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE; - /* original sc used for lr is handled by dev reset code */ - if (sc != lr_sc) { - fnic_release_ioreq_buf(fnic, io_req, sc); - mempool_free(io_req, fnic->io_req_pool); - } + /* original sc used for lr is handled by dev reset code */ + CMD_SP(sc) = NULL; + spin_unlock_irqrestore(io_lock, flags); - /* - * Any IO is returned during reset, it needs to call scsi_done - * to return the scsi_cmnd to upper layer. - */ - if (sc->scsi_done) { - /* Set result to let upper SCSI layer retry */ - sc->result = DID_RESET << 16; - sc->scsi_done(sc); - } + /* original sc used for lr is handled by dev reset code */ + fnic_release_ioreq_buf(fnic, io_req, sc); + mempool_free(io_req, fnic->io_req_pool); + + /* + * Any IO is returned during reset, it needs to call scsi_done + * to return the scsi_cmnd to upper layer. + */ + if (sc->scsi_done) { + /* Set result to let upper SCSI layer retry */ + sc->result = DID_RESET << 16; + sc->scsi_done(sc); } + return true; +} + +/* + * Clean up any pending aborts on the lun + * For each outstanding IO on this lun, whose abort is not completed by fw, + * issue a local abort. Wait for abort to complete. Return 0 if all commands + * successfully aborted, 1 otherwise + */ +static int fnic_clean_pending_aborts(struct fnic *fnic, + struct scsi_cmnd *lr_sc) +{ + int ret = SUCCESS; + struct fnic_pending_aborts_iter_data iter_data = { + .fnic = fnic, + .lun_dev = lr_sc->device, + .ret = SUCCESS, + }; + + scsi_host_busy_iter(fnic->lport->host, + fnic_pending_aborts_iter, &iter_data); + if (iter_data.ret == FAILED) { + ret = iter_data.ret; + goto clean_pending_aborts_end; + } schedule_timeout(msecs_to_jiffies(2 * fnic->config.ed_tov)); /* walk again to check, if IOs are still pending in fw */ @@ -2725,6 +2630,43 @@ void fnic_exch_mgr_reset(struct fc_lport *lp, u32 sid, u32 did) } +static bool fnic_abts_pending_iter(struct scsi_cmnd *sc, void *data, + bool reserved) +{ + struct fnic_pending_aborts_iter_data *iter_data = data; + struct fnic *fnic = iter_data->fnic; + int cmd_state; + struct fnic_io_req *io_req; + spinlock_t *io_lock; + unsigned long flags; + + if (iter_data->lun_dev && sc->device != iter_data->lun_dev) + return true; + + io_lock = fnic_io_lock_hash(fnic, sc); + spin_lock_irqsave(io_lock, flags); + + io_req = (struct fnic_io_req *)CMD_SP(sc); + if (!io_req) { + spin_unlock_irqrestore(io_lock, flags); + return true; + } + + /* + * Found IO that is still pending with firmware and + * belongs to the LUN that we are resetting + */ + FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, + "Found IO in %s on lun\n", + fnic_ioreq_state_to_str(CMD_STATE(sc))); + cmd_state = CMD_STATE(sc); + spin_unlock_irqrestore(io_lock, flags); + if (cmd_state == FNIC_IOREQ_ABTS_PENDING) + iter_data->ret = 1; + + return iter_data->ret ? false : true; +} + /* * fnic_is_abts_pending() is a helper function that * walks through tag map to check if there is any IOs pending,if there is one, @@ -2734,49 +2676,18 @@ void fnic_exch_mgr_reset(struct fc_lport *lp, u32 sid, u32 did) */ int fnic_is_abts_pending(struct fnic *fnic, struct scsi_cmnd *lr_sc) { - int tag; - struct fnic_io_req *io_req; - spinlock_t *io_lock; - unsigned long flags; - int ret = 0; - struct scsi_cmnd *sc; - struct scsi_device *lun_dev = NULL; + struct fnic_pending_aborts_iter_data iter_data = { + .fnic = fnic, + .lun_dev = NULL, + .ret = 0, + }; if (lr_sc) - lun_dev = lr_sc->device; + iter_data.lun_dev = lr_sc->device; /* walk again to check, if IOs are still pending in fw */ - for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) { - sc = scsi_host_find_tag(fnic->lport->host, tag); - /* - * ignore this lun reset cmd or cmds that do not belong to - * this lun - */ - if (!sc || (lr_sc && (sc->device != lun_dev || sc == lr_sc))) - continue; - - io_lock = fnic_io_lock_hash(fnic, sc); - spin_lock_irqsave(io_lock, flags); - - io_req = (struct fnic_io_req *)CMD_SP(sc); + scsi_host_busy_iter(fnic->lport->host, + fnic_abts_pending_iter, &iter_data); - if (!io_req || sc->device != lun_dev) { - spin_unlock_irqrestore(io_lock, flags); - continue; - } - - /* - * Found IO that is still pending with firmware and - * belongs to the LUN that we are resetting - */ - FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, - "Found IO in %s on lun\n", - fnic_ioreq_state_to_str(CMD_STATE(sc))); - - if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) - ret = 1; - spin_unlock_irqrestore(io_lock, flags); - } - - return ret; + return iter_data.ret; }