Hi Sebastian, Thanks a lot for testing and adding 4.19 kernel support to our driver. I pulled your changes and merged to gitlab repository. Fixed the issues which you encountered, pushed the changes to our repository. Thanks, Ram https://gitlab.com/jsmart/efct-Emulex_FC_Target On Thu, Dec 20, 2018 at 4:55 PM Sebastian Herbszt <herbszt@xxxxxxx> wrote: > > Hello James, > > > I noticed this version does only build here on kernel 4.18. I pushed the > > required changes for kernel 4.19 to my repository [1]. > > this patch [1] is required on 32 bit to fix > > WARNING: "__udivdi3" [efct.ko] undefined! > > It seems v2 contains some regressions: > > My simple setup triggered this > > [ 167.858868] efct:efct_hw_cb_link:8556:[fc0] :Link Up, NPORT, speed is 16000 > [ 167.862576] efct:efct_els_req_send:96:[fc0] :send efct_send_flogi > [ 167.862796] BUG: unable to handle kernel NULL pointer dereference at 0000035c > [ 167.862805] *pde = 00000000 > [ 167.862813] Oops: 0000 [#1] SMP PTI > [ 167.862822] CPU: 1 PID: 2707 Comm: efct:0:0 Tainted: G O 4.19.0-rc2-2.g0d9481c-default #1 openSUSE Tumbleweed (unreleased) > [ 167.862829] Hardware name: FUJITSU SIEMENS ESPRIMO E /D2164-A1, BIOS 5.00 R1.10.2164.A1 05/08/2006 > [ 167.862856] EIP: efct_send_flogi_p2p_acc+0x25/0x1d0 [efct] > [ 167.862863] Code: 97 f8 eb da 90 3e 8d 74 26 00 55 89 e5 57 56 53 8b 42 08 89 d3 89 ce 8b 00 85 c0 74 0d f6 80 18 03 00 00 02 0f 85 2b 01 00 00 <ff> 35 5c 03 00 00 68 3c d7 97 f8 e8 cb 63 18 e0 c7 05 5c 03 00 00 > [ 167.862873] EAX: f2ec0000 EBX: ec3c8000 ECX: 00001802 EDX: ec3c8000 > [ 167.862878] ESI: 00001802 EDI: ec3c8400 EBP: eb61fd4c ESP: eb61fd40 > [ 167.862891] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 EFLAGS: 00010246 > [ 167.862902] CR0: 80050033 CR2: 0000035c CR3: 36700000 CR4: 000006d0 > [ 167.862914] Call Trace: > [ 167.862947] __efc_d_init+0x11f/0x630 [efct] > [ 167.862976] ? efc_send_ls_acc_after_attach+0x90/0x90 [efct] > [ 167.863004] efc_sm_post_event+0x11/0x30 [efct] > [ 167.863033] efc_node_post_event+0x3e/0xd0 [efct] > [ 167.863062] efc_node_recv_els_frame+0x91/0xb0 [efct] > [ 167.863094] efc_node_dispatch_frame+0x127/0x1f0 [efct] > [ 167.863124] efc_domain_dispatch_frame+0x1a1/0x2b0 [efct] > [ 167.863154] efct_unsolicited_cb+0x189/0x1a0 [efct] > [ 167.863183] ? efct_unsolicited_cb+0x189/0x1a0 [efct] > [ 167.863210] efct_hw_rqpair_process_rq+0x17b/0x2f0 [efct] > [ 167.863237] efct_hw_cq_process+0x1fd/0x310 [efct] > [ 167.863263] ? sli_eq_read+0x2e/0xd0 [efct] > [ 167.863288] ? sli_eq_read+0xab/0xd0 [efct] > [ 167.863316] efct_hw_eq_process+0x93/0x180 [efct] > [ 167.863344] efct_hw_process+0x2c/0x40 [efct] > [ 167.863364] efct_intr_thread+0xa1/0xd0 [efct] > [ 167.863379] kthread+0xf0/0x110 > [ 167.863398] ? efct_teardown_msix+0x50/0x50 [efct] > [ 167.863410] ? kthread_create_worker_on_cpu+0x20/0x20 > [ 167.863422] ret_from_fork+0x2e/0x40 > [ 167.863433] Modules linked in: nvme_fc nvme_fabrics nvmet_fc nvmet efct(O) scsi_transport_fc target_core_user uio brd target_core_pscsi target_core_file target_core_iblock target_core_mod configfs edd nfsd snd_pcm_oss snd_mixer_oss snd_seq snd_seq_device lockd grace nfs_acl auth_rpcgss sunrpc dm_mod gpio_ich snd_hda_codec_realtek snd_hda_codec_generic iTCO_wdt iTCO_vendor_support snd_hda_intel snd_hda_codec tg3 libphy lpc_ich snd_hda_core ptp ppdev pps_core snd_hwdep hwmon snd_pcm parport_pc pcspkr floppy button snd_timer snd soundcore i2c_i801 parport sg ehci_pci i915 drm_kms_helper drm uhci_hcd ehci_hcd fb_sys_fops sysimgblt sysfillrect syscopyarea i2c_algo_bit video usbcore scsi_dh_alua scsi_dh_hp_sw scsi_dh_rdac scsi_dh_emc fan ata_generic ata_piix ahci libahci libata thermal [last unloaded: speedstep_lib] > [ 167.863576] CR2: 000000000000035c > [ 167.863587] ---[ end trace a869d8ef0400f630 ]--- > [ 167.863608] EIP: efct_send_flogi_p2p_acc+0x25/0x1d0 [efct] > [ 167.863619] Code: 97 f8 eb da 90 3e 8d 74 26 00 55 89 e5 57 56 53 8b 42 08 89 d3 89 ce 8b 00 85 c0 74 0d f6 80 18 03 00 00 02 0f 85 2b 01 00 00 <ff> 35 5c 03 00 00 68 3c d7 97 f8 e8 cb 63 18 e0 c7 05 5c 03 00 00 > [ 167.863638] EAX: f2ec0000 EBX: ec3c8000 ECX: 00001802 EDX: ec3c8000 > [ 167.863648] ESI: 00001802 EDI: ec3c8400 EBP: eb61fd4c ESP: d966347c > [ 167.863659] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 EFLAGS: 00010246 > [ 167.863669] CR0: 80050033 CR2: 0000035c CR3: 36700000 CR4: 000006d0 > > As you can see [2] "io" is NULL when it's used. This patch seems to fix it: > > diff --git a/efct/efct_els.c b/efct/efct_els.c > index 524fda7..45a7198 100644 > --- a/efct/efct_els.c > +++ b/efct/efct_els.c > @@ -1537,6 +1537,13 @@ efct_send_flogi_p2p_acc(struct efc_lport *efc, struct efc_node_s *node, > > node_els_trace(); > > + io = efct_els_io_alloc(node, sizeof(struct fc_plogi_payload_s), > + EFCT_ELS_ROLE_RESPONDER); > + > + if (!io) { > + efct_log_err(efct, "els IO alloc failed\n"); > + return io; > + } > io->els_callback = NULL; > io->els_callback_arg = NULL; > io->display_name = "flogi_p2p_acc"; > > > With this change I am able to use the exported volume but a read test results in > > [ 359.747276] WARNING: CPU: 0 PID: 3338 at /devel/efct/efct/efct_scsi.c:1341 efct_scsi_send_rd_data+0x438/0x480 [efct] > [ 359.747278] Modules linked in: efct(O) nvme_fc nvme_fabrics nvmet_fc nvmet scsi_transport_fc target_core_user uio brd target_core_pscsi target_core_file target_core_iblock target_core_mod configfs nfsd lockd grace nfs_acl auth_rpcgss sunrpc edd snd_pcm_oss snd_mixer_oss snd_seq snd_seq_device dm_mod snd_hda_codec_realtek snd_hda_codec_generic snd_hda_intel gpio_ich iTCO_wdt iTCO_vendor_support snd_hda_codec snd_hda_core tg3 snd_hwdep snd_pcm lpc_ich snd_timer snd libphy soundcore ptp i2c_i801 ppdev pps_core hwmon parport_pc ehci_pci sg parport pcspkr floppy button i915 drm_kms_helper drm fb_sys_fops sysimgblt sysfillrect syscopyarea uhci_hcd ehci_hcd usbcore i2c_algo_bit video scsi_dh_alua scsi_dh_hp_sw scsi_dh_rdac scsi_dh_emc fan ata_generic ata_piix ahci libahci libata thermal [last unloaded: efct] > [ 359.747374] CPU: 0 PID: 3338 Comm: efct:0:0 Tainted: G O 4.19.0-rc2-2.g0d9481c-default #1 openSUSE Tumbleweed (unreleased) > [ 359.747376] Hardware name: FUJITSU SIEMENS ESPRIMO E /D2164-A1, BIOS 5.00 R1.10.2164.A1 05/08/2006 > [ 359.747391] EIP: efct_scsi_send_rd_data+0x438/0x480 [efct] > [ 359.747394] Code: b8 fc ff ff 0f 0b 8b 43 24 85 c0 0f 85 99 fc ff ff 90 0f 0b 85 f6 0f 84 8e fc ff ff 31 d2 e9 7a fc ff ff 8d b4 26 00 00 00 00 <0f> 0b e9 d3 fc ff ff 90 0f 0b e9 3d fc ff ff f6 45 ec 02 0f 85 6d > [ 359.747397] EAX: 00080000 EBX: efe307b0 ECX: f50dacac EDX: 00000007 > [ 359.747399] ESI: f2ec8000 EDI: 00000000 EBP: eb88bda0 ESP: eb88bd74 > [ 359.747402] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 EFLAGS: 00010246 > [ 359.747404] CR0: 80050033 CR2: b7f26000 CR3: 3417e000 CR4: 000006d0 > [ 359.747407] Call Trace: > [ 359.747421] ? dma_direct_map_sg+0x55/0xa0 > [ 359.747424] ? dma_direct_map_sg+0x6a/0xa0 > [ 359.747446] efct_lio_queue_data_in+0x20a/0x350 [efct] > [ 359.747467] ? efct_lio_write_pending+0x280/0x280 [efct] > [ 359.747472] ? dequeue_entity+0x1ef/0xba0 > [ 359.747493] efct_lio_datamove_done+0x9d/0x5b0 [efct] > [ 359.747498] ? __switch_to_asm+0x33/0x50 > [ 359.747501] ? __switch_to_asm+0x27/0x50 > [ 359.747503] ? __switch_to_asm+0x33/0x50 > [ 359.747505] ? __switch_to_asm+0x27/0x50 > [ 359.747507] ? __switch_to_asm+0x33/0x50 > [ 359.747510] ? __switch_to_asm+0x27/0x50 > [ 359.747530] ? efct_lio_write_pending+0x280/0x280 [efct] > [ 359.747544] efct_target_io_cb+0xc8/0x230 [efct] > [ 359.747547] ? __switch_to_asm+0x33/0x50 > [ 359.747549] ? __switch_to_asm+0x27/0x50 > [ 359.747551] ? __switch_to_asm+0x33/0x50 > [ 359.747553] ? __switch_to_asm+0x27/0x50 > [ 359.747555] ? __switch_to_asm+0x33/0x50 > [ 359.747569] ? efct_scsi_check_pending+0x2b0/0x2b0 [efct] > [ 359.747588] efct_hw_wq_process_io+0x138/0x880 [efct] > [ 359.747607] ? target_wqe_timer_nop_cb+0x200/0x200 [efct] > [ 359.747626] efct_hw_wq_process+0x3b/0x130 [efct] > [ 359.747645] efct_hw_cq_process+0x1e3/0x310 [efct] > [ 359.747663] ? sli_eq_read+0x2e/0xd0 [efct] > [ 359.747682] ? sli_eq_read+0xab/0xd0 [efct] > [ 359.747702] efct_hw_eq_process+0x93/0x180 [efct] > [ 359.747721] efct_hw_process+0x2c/0x40 [efct] > [ 359.747734] efct_intr_thread+0xa1/0xd0 [efct] > [ 359.747739] kthread+0xf0/0x110 > [ 359.747751] ? efct_teardown_msix+0x50/0x50 [efct] > [ 359.747754] ? kthread_create_worker_on_cpu+0x20/0x20 > [ 359.747757] ret_from_fork+0x2e/0x40 > [ 359.747761] ---[ end trace 6a1c45757778ea22 ]--- > > and this is the following assertion [3] > > efct_assert(io->exp_xfer_len > io->transferred, -1); > > The relevant values are > > xwire_len: 262144 > io->exp_xfer_len: 524288 > io->transferred: 524288 > > I was not yet able to figure out what the problem is. > > [1] https://repo.or.cz/efct-Emulex_FC_Target/sherbszt.git/commitdiff/bd2b72aeb034f19be99566b3897efde4e9e24c46 > [2] https://gitlab.com/jsmart/efct-Emulex_FC_Target/blob/master/efct/efct_els.c#L1512 > [3] https://gitlab.com/jsmart/efct-Emulex_FC_Target/blob/master/efct/efct_scsi.c#L1341 > > Sebastian
