| Message ID | 20220114170424.871391-1-jmeneghi@redhat.com |
|---|---|
| State | New |
| Headers | show |
| Series | [V2] scsi: bnx2fc: flush destroy_work queue before calling bnx2fc_interface_put | expand |
Hi John, > -----Original Message----- > From: John Meneghini <jmeneghi@redhat.com> > Sent: Friday, January 14, 2022 10:34 PM > To: linux-scsi@vger.kernel.org > Cc: linux-kernel@vger.kernel.org; GR-QLogic-Storage-Upstream <GR-QLogic- > Storage-Upstream@marvell.com>; mlombard@redhat.com; Saurav Kashyap > <skashyap@marvell.com> > Subject: [EXT] [PATCH V2] scsi: bnx2fc: flush destroy_work queue before calling > bnx2fc_interface_put > > External Email > > ---------------------------------------------------------------------- > The bnx2fc_destroy functions are removing the interface before calling > destroy_work. This results multiple WARNings from sysfs_remove_group > as the controller rport device attributes are removed to early. > > Replace the fcoe_port's destroy_work queue. It's not needed. > > The problem is easily reproducible with the following steps. > > Example: > > $ dmesg -w & > $ systemctl enable --now fcoe > $ fipvlan -s -c ens2f1 > $ fcoeadm -d ens2f1.802 > [ 583.464488] host2: libfc: Link down on port (7500a1) > [ 583.472651] bnx2fc: 7500a1 - rport not created Yet!! > [ 583.490468] ------------[ cut here ]------------ > [ 583.538725] sysfs group 'power' not found for kobject 'rport-2:0-0' > [ 583.568814] WARNING: CPU: 3 PID: 192 at fs/sysfs/group.c:279 > sysfs_remove_group+0x6f/0x80 > [ 583.607130] Modules linked in: dm_service_time 8021q garp mrp stp llc > bnx2fc cnic uio rpcsec_gss_krb5 auth_rpcgss nfsv4 ... > [ 583.942994] CPU: 3 PID: 192 Comm: kworker/3:2 Kdump: loaded Not > tainted 5.14.0-39.el9.x86_64 #1 > [ 583.984105] Hardware name: HP ProLiant DL120 G7, BIOS J01 07/01/2013 > [ 584.016535] Workqueue: fc_wq_2 fc_rport_final_delete > [scsi_transport_fc] > [ 584.050691] RIP: 0010:sysfs_remove_group+0x6f/0x80 > [ 584.074725] Code: ff 5b 48 89 ef 5d 41 5c e9 ee c0 ff ff 48 89 ef e8 f6 b8 ff > ff eb d1 49 8b 14 24 48 8b 33 48 c7 c7 ... > [ 584.162586] RSP: 0018:ffffb567c15afdc0 EFLAGS: 00010282 > [ 584.188225] RAX: 0000000000000000 RBX: ffffffff8eec4220 RCX: > 0000000000000000 > [ 584.221053] RDX: ffff8c1586ce84c0 RSI: ffff8c1586cd7cc0 RDI: > ffff8c1586cd7cc0 > [ 584.255089] RBP: 0000000000000000 R08: 0000000000000000 R09: > ffffb567c15afc00 > [ 584.287954] R10: ffffb567c15afbf8 R11: ffffffff8fbe7f28 R12: > ffff8c1486326400 > [ 584.322356] R13: ffff8c1486326480 R14: ffff8c1483a4a000 R15: > 0000000000000004 > [ 584.355379] FS: 0000000000000000(0000) GS:ffff8c1586cc0000(0000) > knlGS:0000000000000000 > [ 584.394419] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > [ 584.421123] CR2: 00007fe95a6f7840 CR3: 0000000107674002 CR4: > 00000000000606e0 > [ 584.454888] Call Trace: > [ 584.466108] device_del+0xb2/0x3e0 > [ 584.481701] device_unregister+0x13/0x60 > [ 584.501306] bsg_unregister_queue+0x5b/0x80 > [ 584.522029] bsg_remove_queue+0x1c/0x40 > [ 584.541884] fc_rport_final_delete+0xf3/0x1d0 [scsi_transport_fc] > [ 584.573823] process_one_work+0x1e3/0x3b0 > [ 584.592396] worker_thread+0x50/0x3b0 > [ 584.609256] ? rescuer_thread+0x370/0x370 > [ 584.628877] kthread+0x149/0x170 > [ 584.643673] ? set_kthread_struct+0x40/0x40 > [ 584.662909] ret_from_fork+0x22/0x30 > [ 584.680002] ---[ end trace 53575ecefa942ece ]--- > > Signed-off-by: John Meneghini <jmeneghi@redhat.com> > Signed-off-by: Maurizio Lombardi <mlombard@redhat.com> > --- > drivers/scsi/bnx2fc/bnx2fc_fcoe.c | 20 +++++--------------- > 1 file changed, 5 insertions(+), 15 deletions(-) > > diff --git a/drivers/scsi/bnx2fc/bnx2fc_fcoe.c > b/drivers/scsi/bnx2fc/bnx2fc_fcoe.c > index 71fa62bd3083..9be273c320e2 100644 > --- a/drivers/scsi/bnx2fc/bnx2fc_fcoe.c > +++ b/drivers/scsi/bnx2fc/bnx2fc_fcoe.c > @@ -82,7 +82,7 @@ static int bnx2fc_bind_pcidev(struct bnx2fc_hba *hba); > static void bnx2fc_unbind_pcidev(struct bnx2fc_hba *hba); > static struct fc_lport *bnx2fc_if_create(struct bnx2fc_interface *interface, > struct device *parent, int npiv); > -static void bnx2fc_destroy_work(struct work_struct *work); > +static void bnx2fc_port_destroy(struct fcoe_port *port); > > static struct bnx2fc_hba *bnx2fc_hba_lookup(struct net_device *phys_dev); > static struct bnx2fc_interface *bnx2fc_interface_lookup(struct net_device > @@ -907,9 +907,6 @@ static void bnx2fc_indicate_netevent(void *context, > unsigned long event, > __bnx2fc_destroy(interface); > } > mutex_unlock(&bnx2fc_dev_lock); > - > - /* Ensure ALL destroy work has been completed before return > */ > - flush_workqueue(bnx2fc_wq); > return; > > default: > @@ -1215,8 +1212,8 @@ static int bnx2fc_vport_destroy(struct fc_vport > *vport) > mutex_unlock(&n_port->lp_mutex); > bnx2fc_free_vport(interface->hba, port->lport); > bnx2fc_port_shutdown(port->lport); > + bnx2fc_port_destroy(port); > bnx2fc_interface_put(interface); > - queue_work(bnx2fc_wq, &port->destroy_work); > return 0; > } > > @@ -1525,7 +1522,6 @@ static struct fc_lport *bnx2fc_if_create(struct > bnx2fc_interface *interface, > port->lport = lport; > port->priv = interface; > port->get_netdev = bnx2fc_netdev; > - INIT_WORK(&port->destroy_work, bnx2fc_destroy_work); > > /* Configure fcoe_port */ > rc = bnx2fc_lport_config(lport); > @@ -1653,8 +1649,8 @@ static void __bnx2fc_destroy(struct bnx2fc_interface > *interface) > bnx2fc_interface_cleanup(interface); > bnx2fc_stop(interface); > list_del(&interface->list); > + bnx2fc_port_destroy(port); > bnx2fc_interface_put(interface); > - queue_work(bnx2fc_wq, &port->destroy_work); > } > > /** > @@ -1694,15 +1690,12 @@ static int bnx2fc_destroy(struct net_device > *netdev) > return rc; > } > > -static void bnx2fc_destroy_work(struct work_struct *work) > +static void bnx2fc_port_destroy(struct fcoe_port *port) > { > - struct fcoe_port *port; > struct fc_lport *lport; > > - port = container_of(work, struct fcoe_port, destroy_work); > lport = port->lport; > - > - BNX2FC_HBA_DBG(lport, "Entered bnx2fc_destroy_work\n"); > + BNX2FC_HBA_DBG(lport, "Entered %s, destroying lport %p\n", > __func__, lport); > > bnx2fc_if_destroy(lport); > } > @@ -2556,9 +2549,6 @@ static void bnx2fc_ulp_exit(struct cnic_dev *dev) > __bnx2fc_destroy(interface); > mutex_unlock(&bnx2fc_dev_lock); > > - /* Ensure ALL destroy work has been completed before return */ > - flush_workqueue(bnx2fc_wq); > - > bnx2fc_ulp_stop(hba); > /* unregister cnic device */ > if (test_and_clear_bit(BNX2FC_CNIC_REGISTERED, &hba- > >reg_with_cnic)) > -- Thanks for the patch. Acked-by: Saurav Kashyap <skashyap@marvell.com> Thanks, ~Saurav > 2.27.0
diff --git a/drivers/scsi/bnx2fc/bnx2fc_fcoe.c b/drivers/scsi/bnx2fc/bnx2fc_fcoe.c index 71fa62bd3083..9be273c320e2 100644 --- a/drivers/scsi/bnx2fc/bnx2fc_fcoe.c +++ b/drivers/scsi/bnx2fc/bnx2fc_fcoe.c @@ -82,7 +82,7 @@ static int bnx2fc_bind_pcidev(struct bnx2fc_hba *hba); static void bnx2fc_unbind_pcidev(struct bnx2fc_hba *hba); static struct fc_lport *bnx2fc_if_create(struct bnx2fc_interface *interface, struct device *parent, int npiv); -static void bnx2fc_destroy_work(struct work_struct *work); +static void bnx2fc_port_destroy(struct fcoe_port *port); static struct bnx2fc_hba *bnx2fc_hba_lookup(struct net_device *phys_dev); static struct bnx2fc_interface *bnx2fc_interface_lookup(struct net_device @@ -907,9 +907,6 @@ static void bnx2fc_indicate_netevent(void *context, unsigned long event, __bnx2fc_destroy(interface); } mutex_unlock(&bnx2fc_dev_lock); - - /* Ensure ALL destroy work has been completed before return */ - flush_workqueue(bnx2fc_wq); return; default: @@ -1215,8 +1212,8 @@ static int bnx2fc_vport_destroy(struct fc_vport *vport) mutex_unlock(&n_port->lp_mutex); bnx2fc_free_vport(interface->hba, port->lport); bnx2fc_port_shutdown(port->lport); + bnx2fc_port_destroy(port); bnx2fc_interface_put(interface); - queue_work(bnx2fc_wq, &port->destroy_work); return 0; } @@ -1525,7 +1522,6 @@ static struct fc_lport *bnx2fc_if_create(struct bnx2fc_interface *interface, port->lport = lport; port->priv = interface; port->get_netdev = bnx2fc_netdev; - INIT_WORK(&port->destroy_work, bnx2fc_destroy_work); /* Configure fcoe_port */ rc = bnx2fc_lport_config(lport); @@ -1653,8 +1649,8 @@ static void __bnx2fc_destroy(struct bnx2fc_interface *interface) bnx2fc_interface_cleanup(interface); bnx2fc_stop(interface); list_del(&interface->list); + bnx2fc_port_destroy(port); bnx2fc_interface_put(interface); - queue_work(bnx2fc_wq, &port->destroy_work); } /** @@ -1694,15 +1690,12 @@ static int bnx2fc_destroy(struct net_device *netdev) return rc; } -static void bnx2fc_destroy_work(struct work_struct *work) +static void bnx2fc_port_destroy(struct fcoe_port *port) { - struct fcoe_port *port; struct fc_lport *lport; - port = container_of(work, struct fcoe_port, destroy_work); lport = port->lport; - - BNX2FC_HBA_DBG(lport, "Entered bnx2fc_destroy_work\n"); + BNX2FC_HBA_DBG(lport, "Entered %s, destroying lport %p\n", __func__, lport); bnx2fc_if_destroy(lport); } @@ -2556,9 +2549,6 @@ static void bnx2fc_ulp_exit(struct cnic_dev *dev) __bnx2fc_destroy(interface); mutex_unlock(&bnx2fc_dev_lock); - /* Ensure ALL destroy work has been completed before return */ - flush_workqueue(bnx2fc_wq); - bnx2fc_ulp_stop(hba); /* unregister cnic device */ if (test_and_clear_bit(BNX2FC_CNIC_REGISTERED, &hba->reg_with_cnic))
The bnx2fc_destroy functions are removing the interface before calling destroy_work. This results multiple WARNings from sysfs_remove_group as the controller rport device attributes are removed to early. Replace the fcoe_port's destroy_work queue. It's not needed. The problem is easily reproducible with the following steps. Example: $ dmesg -w & $ systemctl enable --now fcoe $ fipvlan -s -c ens2f1 $ fcoeadm -d ens2f1.802 [ 583.464488] host2: libfc: Link down on port (7500a1) [ 583.472651] bnx2fc: 7500a1 - rport not created Yet!! [ 583.490468] ------------[ cut here ]------------ [ 583.538725] sysfs group 'power' not found for kobject 'rport-2:0-0' [ 583.568814] WARNING: CPU: 3 PID: 192 at fs/sysfs/group.c:279 sysfs_remove_group+0x6f/0x80 [ 583.607130] Modules linked in: dm_service_time 8021q garp mrp stp llc bnx2fc cnic uio rpcsec_gss_krb5 auth_rpcgss nfsv4 ... [ 583.942994] CPU: 3 PID: 192 Comm: kworker/3:2 Kdump: loaded Not tainted 5.14.0-39.el9.x86_64 #1 [ 583.984105] Hardware name: HP ProLiant DL120 G7, BIOS J01 07/01/2013 [ 584.016535] Workqueue: fc_wq_2 fc_rport_final_delete [scsi_transport_fc] [ 584.050691] RIP: 0010:sysfs_remove_group+0x6f/0x80 [ 584.074725] Code: ff 5b 48 89 ef 5d 41 5c e9 ee c0 ff ff 48 89 ef e8 f6 b8 ff ff eb d1 49 8b 14 24 48 8b 33 48 c7 c7 ... [ 584.162586] RSP: 0018:ffffb567c15afdc0 EFLAGS: 00010282 [ 584.188225] RAX: 0000000000000000 RBX: ffffffff8eec4220 RCX: 0000000000000000 [ 584.221053] RDX: ffff8c1586ce84c0 RSI: ffff8c1586cd7cc0 RDI: ffff8c1586cd7cc0 [ 584.255089] RBP: 0000000000000000 R08: 0000000000000000 R09: ffffb567c15afc00 [ 584.287954] R10: ffffb567c15afbf8 R11: ffffffff8fbe7f28 R12: ffff8c1486326400 [ 584.322356] R13: ffff8c1486326480 R14: ffff8c1483a4a000 R15: 0000000000000004 [ 584.355379] FS: 0000000000000000(0000) GS:ffff8c1586cc0000(0000) knlGS:0000000000000000 [ 584.394419] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 584.421123] CR2: 00007fe95a6f7840 CR3: 0000000107674002 CR4: 00000000000606e0 [ 584.454888] Call Trace: [ 584.466108] device_del+0xb2/0x3e0 [ 584.481701] device_unregister+0x13/0x60 [ 584.501306] bsg_unregister_queue+0x5b/0x80 [ 584.522029] bsg_remove_queue+0x1c/0x40 [ 584.541884] fc_rport_final_delete+0xf3/0x1d0 [scsi_transport_fc] [ 584.573823] process_one_work+0x1e3/0x3b0 [ 584.592396] worker_thread+0x50/0x3b0 [ 584.609256] ? rescuer_thread+0x370/0x370 [ 584.628877] kthread+0x149/0x170 [ 584.643673] ? set_kthread_struct+0x40/0x40 [ 584.662909] ret_from_fork+0x22/0x30 [ 584.680002] ---[ end trace 53575ecefa942ece ]--- Signed-off-by: John Meneghini <jmeneghi@redhat.com> Signed-off-by: Maurizio Lombardi <mlombard@redhat.com> --- drivers/scsi/bnx2fc/bnx2fc_fcoe.c | 20 +++++--------------- 1 file changed, 5 insertions(+), 15 deletions(-)