From: Mike Christie <michael.christie@oracle.com>
To: lduncan@suse.com, cleech@redhat.com, njavali@marvell.com,
mrangankar@marvell.com, GR-QLogic-Storage-Upstream@marvell.com,
martin.petersen@oracle.com, linux-scsi@vger.kernel.org,
jejb@linux.ibm.com
Cc: Mike Christie <michael.christie@oracle.com>
Subject: [PATCH 6/6] scsi: iscsi: Fix session removal on shutdown
Date: Thu, 16 Jun 2022 17:27:38 -0500 [thread overview]
Message-ID: <20220616222738.5722-7-michael.christie@oracle.com> (raw)
In-Reply-To: <20220616222738.5722-1-michael.christie@oracle.com>
When the system is shutting down, iscsid is not running so we will not get
a response to the ISCSI_ERR_INVALID_HOST error event. The system shutdown
will then hang waiting on userspace to remove the session.
This has libiscsi force the destruction of the session from the kernel when
iscsi_host_remove() is called from a driver's shutdown callout.
This fixes a regression added in qedi boot with commit d1f2ce77638d ("scsi:
qedi: Fix host removal with running sessions") which made qedi use the
common session removal function that waits on userspace instead of rolling
its own kernel based removal.
Fixes: d1f2ce77638d ("scsi: qedi: Fix host removal with running sessions")
Reviewed-by: Lee Duncan <lduncan@suse.com>
Signed-off-by: Mike Christie <michael.christie@oracle.com>
---
drivers/infiniband/ulp/iser/iscsi_iser.c | 4 ++--
drivers/scsi/be2iscsi/be_main.c | 2 +-
drivers/scsi/bnx2i/bnx2i_iscsi.c | 2 +-
drivers/scsi/cxgbi/libcxgbi.c | 2 +-
drivers/scsi/iscsi_tcp.c | 4 ++--
drivers/scsi/libiscsi.c | 9 +++++++--
drivers/scsi/qedi/qedi_main.c | 9 ++++++---
include/scsi/libiscsi.h | 2 +-
8 files changed, 21 insertions(+), 13 deletions(-)
diff --git a/drivers/infiniband/ulp/iser/iscsi_iser.c b/drivers/infiniband/ulp/iser/iscsi_iser.c
index 321949a570ed..620ae5b2d80d 100644
--- a/drivers/infiniband/ulp/iser/iscsi_iser.c
+++ b/drivers/infiniband/ulp/iser/iscsi_iser.c
@@ -568,7 +568,7 @@ static void iscsi_iser_session_destroy(struct iscsi_cls_session *cls_session)
struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
iscsi_session_teardown(cls_session);
- iscsi_host_remove(shost);
+ iscsi_host_remove(shost, false);
iscsi_host_free(shost);
}
@@ -685,7 +685,7 @@ iscsi_iser_session_create(struct iscsi_endpoint *ep,
return cls_session;
remove_host:
- iscsi_host_remove(shost);
+ iscsi_host_remove(shost, false);
free_host:
iscsi_host_free(shost);
return NULL;
diff --git a/drivers/scsi/be2iscsi/be_main.c b/drivers/scsi/be2iscsi/be_main.c
index 3bb0adefbe06..02026476c39c 100644
--- a/drivers/scsi/be2iscsi/be_main.c
+++ b/drivers/scsi/be2iscsi/be_main.c
@@ -5745,7 +5745,7 @@ static void beiscsi_remove(struct pci_dev *pcidev)
cancel_work_sync(&phba->sess_work);
beiscsi_iface_destroy_default(phba);
- iscsi_host_remove(phba->shost);
+ iscsi_host_remove(phba->shost, false);
beiscsi_disable_port(phba, 1);
/* after cancelling boot_work */
diff --git a/drivers/scsi/bnx2i/bnx2i_iscsi.c b/drivers/scsi/bnx2i/bnx2i_iscsi.c
index 15fbd09baa94..a3c800e04a2e 100644
--- a/drivers/scsi/bnx2i/bnx2i_iscsi.c
+++ b/drivers/scsi/bnx2i/bnx2i_iscsi.c
@@ -909,7 +909,7 @@ void bnx2i_free_hba(struct bnx2i_hba *hba)
{
struct Scsi_Host *shost = hba->shost;
- iscsi_host_remove(shost);
+ iscsi_host_remove(shost, false);
INIT_LIST_HEAD(&hba->ep_ofld_list);
INIT_LIST_HEAD(&hba->ep_active_list);
INIT_LIST_HEAD(&hba->ep_destroy_list);
diff --git a/drivers/scsi/cxgbi/libcxgbi.c b/drivers/scsi/cxgbi/libcxgbi.c
index 4365d52c6430..32abdf0fa9aa 100644
--- a/drivers/scsi/cxgbi/libcxgbi.c
+++ b/drivers/scsi/cxgbi/libcxgbi.c
@@ -328,7 +328,7 @@ void cxgbi_hbas_remove(struct cxgbi_device *cdev)
chba = cdev->hbas[i];
if (chba) {
cdev->hbas[i] = NULL;
- iscsi_host_remove(chba->shost);
+ iscsi_host_remove(chba->shost, false);
pci_dev_put(cdev->pdev);
iscsi_host_free(chba->shost);
}
diff --git a/drivers/scsi/iscsi_tcp.c b/drivers/scsi/iscsi_tcp.c
index 9fee70d6434a..52c6f70d60ec 100644
--- a/drivers/scsi/iscsi_tcp.c
+++ b/drivers/scsi/iscsi_tcp.c
@@ -898,7 +898,7 @@ iscsi_sw_tcp_session_create(struct iscsi_endpoint *ep, uint16_t cmds_max,
remove_session:
iscsi_session_teardown(cls_session);
remove_host:
- iscsi_host_remove(shost);
+ iscsi_host_remove(shost, false);
free_host:
iscsi_host_free(shost);
return NULL;
@@ -915,7 +915,7 @@ static void iscsi_sw_tcp_session_destroy(struct iscsi_cls_session *cls_session)
iscsi_tcp_r2tpool_free(cls_session->dd_data);
iscsi_session_teardown(cls_session);
- iscsi_host_remove(shost);
+ iscsi_host_remove(shost, false);
iscsi_host_free(shost);
}
diff --git a/drivers/scsi/libiscsi.c b/drivers/scsi/libiscsi.c
index 797abf4f5399..3ddb701cd29c 100644
--- a/drivers/scsi/libiscsi.c
+++ b/drivers/scsi/libiscsi.c
@@ -2828,11 +2828,12 @@ static void iscsi_notify_host_removed(struct iscsi_cls_session *cls_session)
/**
* iscsi_host_remove - remove host and sessions
* @shost: scsi host
+ * @is_shutdown: true if called from a driver shutdown callout
*
* If there are any sessions left, this will initiate the removal and wait
* for the completion.
*/
-void iscsi_host_remove(struct Scsi_Host *shost)
+void iscsi_host_remove(struct Scsi_Host *shost, bool is_shutdown)
{
struct iscsi_host *ihost = shost_priv(shost);
unsigned long flags;
@@ -2841,7 +2842,11 @@ void iscsi_host_remove(struct Scsi_Host *shost)
ihost->state = ISCSI_HOST_REMOVED;
spin_unlock_irqrestore(&ihost->lock, flags);
- iscsi_host_for_each_session(shost, iscsi_notify_host_removed);
+ if (!is_shutdown)
+ iscsi_host_for_each_session(shost, iscsi_notify_host_removed);
+ else
+ iscsi_host_for_each_session(shost, iscsi_force_destroy_session);
+
wait_event_interruptible(ihost->session_removal_wq,
ihost->num_sessions == 0);
if (signal_pending(current))
diff --git a/drivers/scsi/qedi/qedi_main.c b/drivers/scsi/qedi/qedi_main.c
index deebe62e2b41..cecfb2cb4c7b 100644
--- a/drivers/scsi/qedi/qedi_main.c
+++ b/drivers/scsi/qedi/qedi_main.c
@@ -2414,9 +2414,12 @@ static void __qedi_remove(struct pci_dev *pdev, int mode)
int rval;
u16 retry = 10;
- if (mode == QEDI_MODE_NORMAL || mode == QEDI_MODE_SHUTDOWN) {
- iscsi_host_remove(qedi->shost);
+ if (mode == QEDI_MODE_NORMAL)
+ iscsi_host_remove(qedi->shost, false);
+ else if (mode == QEDI_MODE_SHUTDOWN)
+ iscsi_host_remove(qedi->shost, true);
+ if (mode == QEDI_MODE_NORMAL || mode == QEDI_MODE_SHUTDOWN) {
if (qedi->tmf_thread) {
destroy_workqueue(qedi->tmf_thread);
qedi->tmf_thread = NULL;
@@ -2791,7 +2794,7 @@ static int __qedi_probe(struct pci_dev *pdev, int mode)
#ifdef CONFIG_DEBUG_FS
qedi_dbg_host_exit(&qedi->dbg_ctx);
#endif
- iscsi_host_remove(qedi->shost);
+ iscsi_host_remove(qedi->shost, false);
stop_iscsi_func:
qedi_ops->stop(qedi->cdev);
stop_slowpath:
diff --git a/include/scsi/libiscsi.h b/include/scsi/libiscsi.h
index c0703cd20a99..9758a4a9923f 100644
--- a/include/scsi/libiscsi.h
+++ b/include/scsi/libiscsi.h
@@ -411,7 +411,7 @@ extern int iscsi_host_add(struct Scsi_Host *shost, struct device *pdev);
extern struct Scsi_Host *iscsi_host_alloc(struct scsi_host_template *sht,
int dd_data_size,
bool xmit_can_sleep);
-extern void iscsi_host_remove(struct Scsi_Host *shost);
+extern void iscsi_host_remove(struct Scsi_Host *shost, bool is_shutdown);
extern void iscsi_host_free(struct Scsi_Host *shost);
extern int iscsi_target_alloc(struct scsi_target *starget);
extern int iscsi_host_get_max_scsi_cmds(struct Scsi_Host *shost,
--
2.25.1
next prev parent reply other threads:[~2022-06-16 22:28 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-06-16 22:27 [PATCH 0/6] iscsi fixes for 5.19 or 5.20 Mike Christie
2022-06-16 22:27 ` [PATCH 1/6] scsi: iscsi: Fix HW conn removal use after free Mike Christie
2022-06-16 22:27 ` [PATCH 2/6] scsi: iscsi: Allow iscsi_if_stop_conn to be called from kernel Mike Christie
2022-06-16 22:27 ` [PATCH 3/6] scsi: iscsi: Cleanup bound endpoints during shutdown Mike Christie
2022-06-16 22:27 ` [PATCH 4/6] scsi: iscsi: Add helper to remove a session from the kernel Mike Christie
2022-06-16 22:27 ` [PATCH 5/6] scsi: qedi: Use QEDI_MODE_NORMAL for error handling Mike Christie
2022-06-16 22:27 ` Mike Christie [this message]
2022-06-17 5:18 ` [EXT] [PATCH 0/6] iscsi fixes for 5.19 or 5.20 Nilesh Javali
2022-06-22 1:15 ` Martin K. Petersen
2022-06-28 3:24 ` Martin K. Petersen
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