- 10 Aug, 2017 28 commits
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Finn Thain authored
When in MESSAGE IN phase, the ESP device does not automatically acknowledge each byte that is transferred by PIO. The mac_esp driver neglects to explicitly ack them, which causes a timeout during messages larger than one byte (e.g. tag bytes during reconnect). Fix this with an ESP_CMD_MOK command after each byte. The MESSAGE IN phase is also different in that each byte transferred raises ESP_INTR_FDONE. So don't exit the transfer loop for this interrupt, for this phase. That resolves the "Reconnect IRQ2 timeout" error on those Macs which use PIO transfers instead of PDMA. This patch also improves on the weak tests for unexpected interrupts and phase changes during PIO transfers. Tested-by:
Stan Johnson <userm57@yahoo.com> Fixes: 02507a80 ("[PATCH] [SCSI] mac_esp: fix PIO mode, take 2") Signed-off-by:
Finn Thain <fthain@telegraphics.com.au> Signed-off-by:
Martin K. Petersen <martin.petersen@oracle.com>
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Finn Thain authored
Avoid the following warning from "make C=1": CHECK drivers/scsi/mac_esp.c drivers/scsi/mac_esp.c:357:30: warning: incorrect type in initializer (different address spaces) drivers/scsi/mac_esp.c:357:30: expected unsigned char [usertype] *fifo drivers/scsi/mac_esp.c:357:30: got void [noderef] <asn:2>* Tested-by:
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Bhumika Goyal authored
Add const to bin_attribute structures as they are only passed to the functions system_{remove/create}_bin_file. The arguments passed are of type const, so declare the structures to be const. Done using Coccinelle. Signed-off-by:Bhumika Goyal <bhumirks@gmail.com> Reviewed-by:
Christoph Hellwig <hch@lst.de> Signed-off-by:
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Martin Peschke authored
This patch adds early checks to avoid burning CPU cycles on the assembly of trace entries which would be skipped anyway. Introduce a static const variable to keep the trace level to check with debug_level_enabled() in sync with the actual trace emit with debug_event(). In order not to refactor the SAN tracing too much, simply use a define instead. This change is only for the non / semi hot paths, while the actual (I/O) hot path was already improved earlier: zfcp_dbf_scsi() is already guarded by its only caller _zfcp_dbf_scsi() since commit dcd20e23 ("[SCSI] zfcp: Only collect SCSI debug data for matching trace levels"). zfcp_dbf_hba_fsf_res() is already guarded by its only caller zfcp_dbf_hba_fsf_response() since commit 2e261af8 ("[SCSI] zfcp: Only collect FSF/HBA debug data for matching trace levels"). Signed-off-by:
Martin Peschke <mpeschke@linux.vnet.ibm.com> [maier@linux.vnet.ibm.com: rebase, reword, default level 3 branch prediction] Signed-off-by:
Steffen Maier <maier@linux.vnet.ibm.com> Reviewed-by:
Benjamin Block <bblock@linux.vnet.ibm.com> Signed-off-by:
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Martin Peschke authored
Improves commit 43f60cbd ("[SCSI] zfcp: No automatic port_rescan on events") Signed-off-by:
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Martin Peschke authored
v2.6.38 commit a54ca0f6 ("[SCSI] zfcp: Redesign of the debug tracing for HBA records.") dropped trace information previously introduced with v2.6.27 commit c3baa9a2 ("[SCSI] zfcp: Add information about interrupt to trace.") but kept and needlessly assigned a now no longer used struct field. Signed-off-by:
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Steffen Maier authored
Commit a54ca0f6 ("[SCSI] zfcp: Redesign of the debug tracing for HBA records.") refactored zfcp_dbf_hba_berr into zfcp_dbf_hba_bit_err but added the prototype for the latter without removing it for the former. Suggested-by:
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Martin Peschke authored
Signed-off-by:
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Steffen Maier authored
Improves commit 250a1352 ("[SCSI] zfcp: Redesign of the debug tracing for SCSI records.") Signed-off-by:
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Steffen Maier authored
Just to silence sparse. Since zfcp only exists for s390 and s390 is big endian, this has been working correctly without conversions and all the new conversions are NOPs so no performance impact. Nonetheless, use the conversion on the constant expression where possible. NB: N_Port-IDs have always been handled with hton24 or ntoh24 conversions because they also convert to / from character array. Affected common code structs and .fields are: HOT I/O PATH: fcp_cmnd .fc_dl FCP command: regular SCSI I/O, including DIX case SEMI-HOT I/O PATH: fcp_cmnd .fc_dl recovery FCP command: task management function (LUN / target reset) fcp_resp_ext FCP response having FCP_SNS_LEN_VAL with .fr_rsp_len .fr_sns_len FCP response having FCP_RESID_UNDER with .fr_resid RECOVERY / DISCOVERY PATHS: fc_ct_hdr .ct_cmd .ct_mr_size zfcp auto port scan [GPN_FT] with fc_gpn_ft_resp.fp_wwpn, recovery for returned port [GID_PN] with fc_ns_gid_pn.fn_wwpn, get symbolic port name [GSPN], register symbolic port name [RSPN] (NPIV only). fc_els_rscn .rscn_plen incoming ELS (RSCN). fc_els_flogi .fl_wwpn .fl_wwnn incoming ELS (PLOGI), port open response with .fl_csp.sp_bb_data .fl_cssp[0..3].cp_class, FCP channel physical port, point-to-point peer (P2P only). fc_els_logo .fl_n_port_wwn incoming ELS (LOGO). fc_els_adisc .adisc_wwnn .adisc_wwpn path test after RSCN for gone target port. Since v4.10 commit 05de9700 ("linux/types.h: enable endian checks for all sparse builds"), below sparse endianness reports appear by default. Previously, one needed to pass argument CF="-D__CHECK_ENDIAN__" to make as in: $ make C=1 CF="-D__CHECK_ENDIAN__" M=drivers/s390/scsi. Silenced sparse warnings and one error: $ make C=1 M=drivers/s390/scsi ... CHECK drivers/s390/scsi/zfcp_dbf.c drivers/s390/scsi/zfcp_dbf.c:463:22: warning: restricted __be16 degrades to integer drivers/s390/scsi/zfcp_dbf.c:476:28: warning: restricted __be16 degrades to integer CC drivers/s390/scsi/zfcp_dbf.o ... CHECK drivers/s390/scsi/zfcp_fc.c drivers/s390/scsi/zfcp_fc.c:263:26: warning: restricted __be16 degrades to integer drivers/s390/scsi/zfcp_fc.c:299:41: warning: incorrect type in argument 2 (different base types) drivers/s390/scsi/zfcp_fc.c:299:41: expected unsigned long long [unsigned] [usertype] wwpn drivers/s390/scsi/zfcp_fc.c:299:41: got restricted __be64 [usertype] fl_wwpn drivers/s390/scsi/zfcp_fc.c:309:40: warning: incorrect type in argument 2 (different base types) drivers/s390/scsi/zfcp_fc.c:309:40: expected unsigned long long [unsigned] [usertype] wwpn drivers/s390/scsi/zfcp_fc.c:309:40: got restricted __be64 [usertype] fl_n_port_wwn drivers/s390/scsi/zfcp_fc.c:338:31: warning: restricted __be16 degrades to integer drivers/s390/scsi/zfcp_fc.c:355:24: warning: incorrect type in assignment (different base types) drivers/s390/scsi/zfcp_fc.c:355:24: expected restricted __be16 [usertype] ct_cmd drivers/s390/scsi/zfcp_fc.c:355:24: got unsigned short [unsigned] [usertype] cmd drivers/s390/scsi/zfcp_fc.c:356:28: warning: incorrect type in assignment (different base types) drivers/s390/scsi/zfcp_fc.c:356:28: expected restricted __be16 [usertype] ct_mr_size drivers/s390/scsi/zfcp_fc.c:356:28: got int drivers/s390/scsi/zfcp_fc.c:379:36: warning: incorrect type in assignment (different base types) drivers/s390/scsi/zfcp_fc.c:379:36: expected restricted __be64 [usertype] fn_wwpn drivers/s390/scsi/zfcp_fc.c:379:36: got unsigned long long [unsigned] [usertype] wwpn drivers/s390/scsi/zfcp_fc.c:463:18: warning: restricted __be64 degrades to integer drivers/s390/scsi/zfcp_fc.c:465:17: warning: cast from restricted __be64 drivers/s390/scsi/zfcp_fc.c:473:20: warning: incorrect type in assignment (different base types) drivers/s390/scsi/zfcp_fc.c:473:20: expected unsigned long long [unsigned] [usertype] wwnn drivers/s390/scsi/zfcp_fc.c:473:20: got restricted __be64 [usertype] fl_wwnn drivers/s390/scsi/zfcp_fc.c:474:29: warning: incorrect type in assignment (different base types) drivers/s390/scsi/zfcp_fc.c:474:29: expected unsigned int [unsigned] [usertype] maxframe_size drivers/s390/scsi/zfcp_fc.c:474:29: got restricted __be16 [usertype] sp_bb_data drivers/s390/scsi/zfcp_fc.c:476:30: warning: restricted __be16 degrades to integer drivers/s390/scsi/zfcp_fc.c:478:30: warning: restricted __be16 degrades to integer drivers/s390/scsi/zfcp_fc.c:480:30: warning: restricted __be16 degrades to integer drivers/s390/scsi/zfcp_fc.c:482:30: warning: restricted __be16 degrades to integer drivers/s390/scsi/zfcp_fc.c:500:28: warning: incorrect type in assignment (different base types) drivers/s390/scsi/zfcp_fc.c:500:28: expected unsigned long long [unsigned] [usertype] wwnn drivers/s390/scsi/zfcp_fc.c:500:28: got restricted __be64 [usertype] adisc_wwnn drivers/s390/scsi/zfcp_fc.c:502:38: warning: restricted __be64 degrades to integer drivers/s390/scsi/zfcp_fc.c:541:40: warning: incorrect type in assignment (different base types) drivers/s390/scsi/zfcp_fc.c:541:40: expected restricted __be64 [usertype] adisc_wwpn drivers/s390/scsi/zfcp_fc.c:541:40: got unsigned long long [unsigned] [usertype] port_name drivers/s390/scsi/zfcp_fc.c:542:40: warning: incorrect type in assignment (different base types) drivers/s390/scsi/zfcp_fc.c:542:40: expected restricted __be64 [usertype] adisc_wwnn drivers/s390/scsi/zfcp_fc.c:542:40: got unsigned long long [unsigned] [usertype] node_name drivers/s390/scsi/zfcp_fc.c:669:16: warning: restricted __be16 degrades to integer drivers/s390/scsi/zfcp_fc.c:696:24: warning: restricted __be64 degrades to integer drivers/s390/scsi/zfcp_fc.c:699:54: warning: incorrect type in argument 2 (different base types) drivers/s390/scsi/zfcp_fc.c:699:54: expected unsigned long long [unsigned] [usertype] <noident> drivers/s390/scsi/zfcp_fc.c:699:54: got restricted __be64 [usertype] fp_wwpn CC drivers/s390/scsi/zfcp_fc.o CHECK drivers/s390/scsi/zfcp_fsf.c drivers/s390/scsi/zfcp_fsf.c:479:34: warning: incorrect type in assignment (different base types) drivers/s390/scsi/zfcp_fsf.c:479:34: expected unsigned long long [unsigned] [usertype] port_name drivers/s390/scsi/zfcp_fsf.c:479:34: got restricted __be64 [usertype] fl_wwpn drivers/s390/scsi/zfcp_fsf.c:480:34: warning: incorrect type in assignment (different base types) drivers/s390/scsi/zfcp_fsf.c:480:34: expected unsigned long long [unsigned] [usertype] node_name drivers/s390/scsi/zfcp_fsf.c:480:34: got restricted __be64 [usertype] fl_wwnn drivers/s390/scsi/zfcp_fsf.c:506:36: warning: incorrect type in assignment (different base types) drivers/s390/scsi/zfcp_fsf.c:506:36: expected unsigned long long [unsigned] [usertype] peer_wwpn drivers/s390/scsi/zfcp_fsf.c:506:36: got restricted __be64 [usertype] fl_wwpn drivers/s390/scsi/zfcp_fsf.c:507:36: warning: incorrect type in assignment (different base types) drivers/s390/scsi/zfcp_fsf.c:507:36: expected unsigned long long [unsigned] [usertype] peer_wwnn drivers/s390/scsi/zfcp_fsf.c:507:36: got restricted __be64 [usertype] fl_wwnn drivers/s390/scsi/zfcp_fc.h:269:46: warning: restricted __be32 degrades to integer drivers/s390/scsi/zfcp_fc.h:270:29: error: incompatible types in comparison expression (different base types) Signed-off-by:
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Steffen Maier authored
This eases crash dump analysis by automatically dissecting these protocol headers at least somewhat rather than getting a string interpretation of large unstructured character array buffer fields. Also, we can get rid of some unnecessary and error-prone type casts. This change is possible since v2.6.33 commit 4318e08c ("[SCSI] zfcp: Update FCP protocol related code"). Signed-off-by:
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Steffen Maier authored
Signed-off-by:
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Steffen Maier authored
v2.6.33 commit dbf5dfe9 ("[SCSI] zfcp: Use common code definitions for FC CT structs") replaced own definitions with common code definitions. While FC_BA_RJT_UNABLE happens to be defined with the same value 9 as FC_FS_RJT_UNABL and thus also works, here we should use the latter from fc_gs.h. See also its use in libfc's fc_disc_gpn_ft_resp(). Signed-off-by:
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Steffen Maier authored
Complements debugging aspects of the otherwise functionally complete v3.17 commit 9cb78c16 ("scsi: use 64-bit LUNs"). While I don't have access to a target exporting 3 or 4 level LUNs, I did test it by explicitly attaching a non-existent fake 4 level LUN by means of zfcp sysfs attribute "unit_add". In order to see corresponding trace records of otherwise successful events, we had to increase the trace level of area SCSI and HBA to 6. $ echo 6 > /sys/kernel/debug/s390dbf/zfcp_0.0.1880_scsi/level $ echo 6 > /sys/kernel/debug/s390dbf/zfcp_0.0.1880_hba/level $ echo 0x4011402240334044 > \ /sys/bus/ccw/drivers/zfcp/0.0.1880/0x50050763031bd327/unit_add Example output formatted by an updated zfcpdbf from the s390-tools package interspersed with kernel messages at scsi_logging_level=4605: Timestamp : ... Area : REC Subarea : 00 Level : 1 Exception : - CPU ID : .. Caller : 0x... Record ID : 1 Tag : scsla_1 LUN : 0x4011402240334044 WWPN : 0x50050763031bd327 D_ID : 0x00...... Adapter status : 0x5400050b Port status : 0x54000001 LUN status : 0x41000000 Ready count : 0x00000001 Running count : 0x00000000 ERP want : 0x01 ERP need : 0x01 scsi 2:0:0:4630896905707208721: scsi scan: INQUIRY pass 1 length 36 scsi 2:0:0:4630896905707208721: scsi scan: INQUIRY successful with code 0x0 Timestamp : ... Area : HBA Subarea : 00 Level : 6 Exception : - CPU ID : .. Caller : 0x... Record ID : 1 Tag : fs_norm Request ID : 0x<inquiry2-req-id> Request status : 0x00000010 FSF cmnd : 0x00000001 FSF sequence no: 0x... FSF issued : ... FSF stat : 0x00000000 FSF stat qual : 00000000 00000000 00000000 00000000 Prot stat : 0x00000001 Prot stat qual : ........ ........ 00000000 00000000 Port handle : 0x... LUN handle : 0x... | Timestamp : ... Area : SCSI Subarea : 00 Level : 6 Exception : - CPU ID : .. Caller : 0x... Record ID : 1 Tag : rsl_nor Request ID : 0x<inquiry2-req-id> SCSI ID : 0x00000000 SCSI LUN : 0x40224011 SCSI LUN high : 0x40444033 <======================= SCSI result : 0x00000000 SCSI retries : 0x00 SCSI allowed : 0x03 SCSI scribble : 0x<inquiry2-req-id> SCSI opcode : 12000000 a4000000 00000000 00000000 FCP rsp inf cod: 0x00 FCP rsp IU : 00000000 00000000 00000000 00000000 00000000 00000000 scsi 2:0:0:4630896905707208721: scsi scan: INQUIRY pass 2 length 164 scsi 2:0:0:4630896905707208721: scsi scan: INQUIRY successful with code 0x0 scsi 2:0:0:4630896905707208721: scsi scan: peripheral device type of 31, \ no device added Signed-off-by:
Jens Remus <jremus@linux.vnet.ibm.com> Signed-off-by:
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Steffen Maier authored
At the default trace level, we only trace unsuccessful events including FSF responses. zfcp_dbf_hba_fsf_response() only used protocol status and FSF status to decide on an unsuccessful response. However, this is only one of multiple possible sources determining a failed struct zfcp_fsf_req. An FSF request can also "fail" if its response runs into an ERP timeout or if it gets dismissed because a higher level recovery was triggered [trace tags "erscf_1" or "erscf_2" in zfcp_erp_strategy_check_fsfreq()]. FSF requests with ERP timeout are: FSF_QTCB_EXCHANGE_CONFIG_DATA, FSF_QTCB_EXCHANGE_PORT_DATA, FSF_QTCB_OPEN_PORT_WITH_DID or FSF_QTCB_CLOSE_PORT or FSF_QTCB_CLOSE_PHYSICAL_PORT for target ports, FSF_QTCB_OPEN_LUN, FSF_QTCB_CLOSE_LUN. One example is slow queue processing which can cause follow-on errors, e.g. FSF_PORT_ALREADY_OPEN after FSF_QTCB_OPEN_PORT_WITH_DID timed out. In order to see the root cause, we need to see late responses even if the channel presented them successfully with FSF_PROT_GOOD and FSF_GOOD. Example trace records formatted with zfcpdbf from the s390-tools package: Timestamp : ... Area : REC Subarea : 00 Level : 1 Exception : - CPU ID : .. Caller : ... Record ID : 1 Tag : fcegpf1 LUN : 0xffffffffffffffff WWPN : 0x<WWPN> D_ID : 0x00<D_ID> Adapter status : 0x5400050b Port status : 0x41200000 LUN status : 0x00000000 Ready count : 0x00000001 Running count : 0x... ERP want : 0x02 ZFCP_ERP_ACTION_REOPEN_PORT ERP need : 0x02 ZFCP_ERP_ACTION_REOPEN_PORT | Timestamp : ... 30 seconds later Area : REC Subarea : 00 Level : 1 Exception : - CPU ID : .. Caller : ... Record ID : 2 Tag : erscf_2 LUN : 0xffffffffffffffff WWPN : 0x<WWPN> D_ID : 0x00<D_ID> Adapter status : 0x5400050b Port status : 0x41200000 LUN status : 0x00000000 Request ID : 0x<request_ID> ERP status : 0x10000000 ZFCP_STATUS_ERP_TIMEDOUT ERP step : 0x0800 ZFCP_ERP_STEP_PORT_OPENING ERP action : 0x02 ZFCP_ERP_ACTION_REOPEN_PORT ERP count : 0x00 | Timestamp : ... later than previous record Area : HBA Subarea : 00 Level : 5 > default level => 3 <= default level Exception : - CPU ID : 00 Caller : ... Record ID : 1 Tag : fs_qtcb => fs_rerr Request ID : 0x<request_ID> Request status : 0x00001010 ZFCP_STATUS_FSFREQ_DISMISSED | ZFCP_STATUS_FSFREQ_CLEANUP FSF cmnd : 0x00000005 FSF sequence no: 0x... FSF issued : ... > 30 seconds ago FSF stat : 0x00000000 FSF_GOOD FSF stat qual : 00000000 00000000 00000000 00000000 Prot stat : 0x00000001 FSF_PROT_GOOD Prot stat qual : 00000000 00000000 00000000 00000000 Port handle : 0x... LUN handle : 0x00000000 QTCB log length: ... QTCB log info : ... In case of problems detecting that new responses are waiting on the input queue, we sooner or later trigger adapter recovery due to an FSF request timeout (trace tag "fsrth_1"). FSF requests with FSF request timeout are: typically FSF_QTCB_ABORT_FCP_CMND; but theoretically also FSF_QTCB_EXCHANGE_CONFIG_DATA or FSF_QTCB_EXCHANGE_PORT_DATA via sysfs, FSF_QTCB_OPEN_PORT_WITH_DID or FSF_QTCB_CLOSE_PORT for WKA ports, FSF_QTCB_FCP_CMND for task management function (LUN / target reset). One or more pending requests can meanwhile have FSF_PROT_GOOD and FSF_GOOD because the channel filled in the response via DMA into the request's QTCB. In a theroretical case, inject code can create an erroneous FSF request on purpose. If data router is enabled, it uses deferred error reporting. A READ SCSI command can succeed with FSF_PROT_GOOD, FSF_GOOD, and SAM_STAT_GOOD. But on writing the read data to host memory via DMA, it can still fail, e.g. if an intentionally wrong scatter list does not provide enough space. Rather than getting an unsuccessful response, we get a QDIO activate check which in turn triggers adapter recovery. One or more pending requests can meanwhile have FSF_PROT_GOOD and FSF_GOOD because the channel filled in the response via DMA into the request's QTCB. Example trace records formatted with zfcpdbf from the s390-tools package: Timestamp : ... Area : HBA Subarea : 00 Level : 6 > default level => 3 <= default level Exception : - CPU ID : .. Caller : ... Record ID : 1 Tag : fs_norm => fs_rerr Request ID : 0x<request_ID2> Request status : 0x00001010 ZFCP_STATUS_FSFREQ_DISMISSED | ZFCP_STATUS_FSFREQ_CLEANUP FSF cmnd : 0x00000001 FSF sequence no: 0x... FSF issued : ... FSF stat : 0x00000000 FSF_GOOD FSF stat qual : 00000000 00000000 00000000 00000000 Prot stat : 0x00000001 FSF_PROT_GOOD Prot stat qual : ........ ........ 00000000 00000000 Port handle : 0x... LUN handle : 0x... | Timestamp : ... Area : SCSI Subarea : 00 Level : 3 Exception : - CPU ID : .. Caller : ... Record ID : 1 Tag : rsl_err Request ID : 0x<request_ID2> SCSI ID : 0x... SCSI LUN : 0x... SCSI result : 0x000e0000 DID_TRANSPORT_DISRUPTED SCSI retries : 0x00 SCSI allowed : 0x05 SCSI scribble : 0x<request_ID2> SCSI opcode : 28... Read(10) FCP rsp inf cod: 0x00 FCP rsp IU : 00000000 00000000 00000000 00000000 ^^ SAM_STAT_GOOD 00000000 00000000 Only with luck in both above cases, we could see a follow-on trace record of an unsuccesful event following a successful but late FSF response with FSF_PROT_GOOD and FSF_GOOD. Typically this was the case for I/O requests resulting in a SCSI trace record "rsl_err" with DID_TRANSPORT_DISRUPTED [On ZFCP_STATUS_FSFREQ_DISMISSED, zfcp_fsf_protstatus_eval() sets ZFCP_STATUS_FSFREQ_ERROR seen by the request handler functions as failure]. However, the reason for this follow-on trace was invisible because the corresponding HBA trace record was missing at the default trace level (by default hidden records with tags "fs_norm", "fs_qtcb", or "fs_open"). On adapter recovery, after we had shut down the QDIO queues, we perform unsuccessful pseudo completions with flag ZFCP_STATUS_FSFREQ_DISMISSED for each pending FSF request in zfcp_fsf_req_dismiss_all(). In order to find the root cause, we need to see all pseudo responses even if the channel presented them successfully with FSF_PROT_GOOD and FSF_GOOD. Therefore, check zfcp_fsf_req.status for ZFCP_STATUS_FSFREQ_DISMISSED or ZFCP_STATUS_FSFREQ_ERROR and trace with a new tag "fs_rerr". It does not matter that there are numerous places which set ZFCP_STATUS_FSFREQ_ERROR after the location where we trace an FSF response early. These cases are based on protocol status != FSF_PROT_GOOD or == FSF_PROT_FSF_STATUS_PRESENTED and are thus already traced by default as trace tag "fs_perr" or "fs_ferr" respectively. NB: The trace record with tag "fssrh_1" for status read buffers on dismiss all remains. zfcp_fsf_req_complete() handles this and returns early. All other FSF request types are handled separately and as described above. Signed-off-by: -
Steffen Maier authored
If the FCP_RSP UI has optional parts (FCP_SNS_INFO or FCP_RSP_INFO) and thus does not fit into the fsp_rsp field built into a SCSI trace record, trace the full FCP_RSP UI with all optional parts as payload record instead of just FCP_SNS_INFO as payload and a 1 byte RSP_INFO_CODE part of FCP_RSP_INFO built into the SCSI record. That way we would also get the full FCP_SNS_INFO in case a target would ever send more than min(SCSI_SENSE_BUFFERSIZE==96, ZFCP_DBF_PAY_MAX_REC==256)==96. The mandatory part of FCP_RSP IU is only 24 bytes. PAYload costs at least one full PAY record of 256 bytes anyway. We cap to the hardware response size which is only FSF_FCP_RSP_SIZE==128. So we can just put the whole FCP_RSP IU with any optional parts into PAYload similarly as we do for SAN PAY since v4.9 commit aceeffbb ("zfcp: trace full payload of all SAN records (req,resp,iels)"). This does not cause any additional trace records wasting memory. Decoded trace records were confusing because they showed a hard-coded sense data length of 96 even if the FCP_RSP_IU field FCP_SNS_LEN showed actually less. Since the same commit, we set pl_len for SAN traces to the full length of a request/response even if we cap the corresponding trace. In contrast, here for SCSI traces we set pl_len to the pre-computed length of FCP_RSP IU considering SNS_LEN or RSP_LEN if valid. Nonetheless we trace a hardcoded payload of length FSF_FCP_RSP_SIZE==128 if there were optional parts. This makes it easier for the zfcpdbf tool to format only the relevant part of the long FCP_RSP UI buffer. And any trailing information is still available in the payload trace record just in case. Rename the payload record tag from "fcp_sns" to "fcp_riu" to make the new content explicit to zfcpdbf which can then pick a suitable field name such as "FCP rsp IU all:" instead of "Sense info :" Also, the same zfcpdbf can still be backwards compatible with "fcp_sns". Old example trace record before this fix, formatted with the tool zfcpdbf from s390-tools: Timestamp : ... Area : SCSI Subarea : 00 Level : 3 Exception : - CPU id : .. Caller : 0x... Record id : 1 Tag : rsl_err Request id : 0x<request_id> SCSI ID : 0x... SCSI LUN : 0x... SCSI result : 0x00000002 SCSI retries : 0x00 SCSI allowed : 0x05 SCSI scribble : 0x<request_id> SCSI opcode : 00000000 00000000 00000000 00000000 FCP rsp inf cod: 0x00 FCP rsp IU : 00000000 00000000 00000202 00000000 ^^==FCP_SNS_LEN_VALID 00000020 00000000 ^^^^^^^^==FCP_SNS_LEN==32 Sense len : 96 <==min(SCSI_SENSE_BUFFERSIZE,ZFCP_DBF_PAY_MAX_REC) Sense info : 70000600 00000018 00000000 29000000 00000400 00000000 00000000 00000000 00000000 00000000 00000000 00000000<==superfluous 00000000 00000000 00000000 00000000<==superfluous 00000000 00000000 00000000 00000000<==superfluous 00000000 00000000 00000000 00000000<==superfluous New example trace records with this fix: Timestamp : ... Area : SCSI Subarea : 00 Level : 3 Exception : - CPU ID : .. Caller : 0x... Record ID : 1 Tag : rsl_err Request ID : 0x<request_id> SCSI ID : 0x... SCSI LUN : 0x... SCSI result : 0x00000002 SCSI retries : 0x00 SCSI allowed : 0x03 SCSI scribble : 0x<request_id> SCSI opcode : a30c0112 00000000 02000000 00000000 FCP rsp inf cod: 0x00 FCP rsp IU : 00000000 00000000 00000a02 00000200 00000020 00000000 FCP rsp IU len : 56 FCP rsp IU all : 00000000 00000000 00000a02 00000200 ^^=FCP_RESID_UNDER|FCP_SNS_LEN_VALID 00000020 00000000 70000500 00000018 ^^^^^^^^==FCP_SNS_LEN ^^^^^^^^^^^^^^^^^ 00000000 240000cb 00011100 00000000 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 00000000 00000000 ^^^^^^^^^^^^^^^^^==FCP_SNS_INFO Timestamp : ... Area : SCSI Subarea : 00 Level : 1 Exception : - CPU ID : .. Caller : 0x... Record ID : 1 Tag : lr_okay Request ID : 0x<request_id> SCSI ID : 0x... SCSI LUN : 0x... SCSI result : 0x00000000 SCSI retries : 0x00 SCSI allowed : 0x05 SCSI scribble : 0x<request_id> SCSI opcode : <CDB of unrelated SCSI command passed to eh handler> FCP rsp inf cod: 0x00 FCP rsp IU : 00000000 00000000 00000100 00000000 00000000 00000008 FCP rsp IU len : 32 FCP rsp IU all : 00000000 00000000 00000100 00000000 ^^==FCP_RSP_LEN_VALID 00000000 00000008 00000000 00000000 ^^^^^^^^==FCP_RSP_LEN ^^^^^^^^^^^^^^^^^==FCP_RSP_INFO Signed-off-by:
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Steffen Maier authored
For problem determination we need to see that we were in scsi_eh as well as whether and why we were successful or not. The following commits introduced new early returns without adding a trace record: v2.6.35 commit a1dbfddd ("[SCSI] zfcp: Pass return code from fc_block_scsi_eh to scsi eh") on fc_block_scsi_eh() returning != 0 which is FAST_IO_FAIL, v2.6.30 commit 63caf367 ("[SCSI] zfcp: Improve reliability of SCSI eh handlers in zfcp") on not having gotten an FSF request after the maximum number of retry attempts and thus could not issue a TMF and has to return FAILED. Signed-off-by:
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Steffen Maier authored
Without this fix we get SCSI trace records on task management functions which cannot be correlated to HBA trace records because all fields related to the FSF request are empty (zero). Also, the FCP_RSP_IU is missing as well as any sense data if available. This was caused by v2.6.14 commit 8a36e453 ("[SCSI] zfcp: enhancement of zfcp debug features") introducing trace records for TMFs but hard coding NULL for a possibly existing TMF FSF request. The scsi_cmnd scribble is also zero or unrelated for the TMF request so it also could not lookup a suitable FSF request from there. A broken example trace record formatted with zfcpdbf from the s390-tools package: Timestamp : ... Area : SCSI Subarea : 00 Level : 1 Exception : - CPU ID : .. Caller : 0x... Record ID : 1 Tag : lr_fail Request ID : 0x0000000000000000 ^^^^^^^^^^^^^^^^ no correlation to HBA record SCSI ID : 0x<scsitarget> SCSI LUN : 0x<scsilun> SCSI result : 0x000e0000 SCSI retries : 0x00 SCSI allowed : 0x05 SCSI scribble : 0x0000000000000000 SCSI opcode : 2a000017 3bb80000 08000000 00000000 FCP rsp inf cod: 0x00 ^^ no TMF response FCP rsp IU : 00000000 00000000 00000000 00000000 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 00000000 00000000 ^^^^^^^^^^^^^^^^^ no interesting FCP_RSP_IU Sense len : ... ^^^^^^^^^^^^^^^^^^^^ no sense data length Sense info : ... ^^^^^^^^^^^^^^^^^^^^ no sense data content, even if present There are some true cases where we really do not have an FSF request: "rsl_fai" from zfcp_dbf_scsi_fail_send() called for early returns / completions in zfcp_scsi_queuecommand(), "abrt_or", "abrt_bl", "abrt_ru", "abrt_ar" from zfcp_scsi_eh_abort_handler() where we did not get as far, "lr_nres", "tr_nres" from zfcp_task_mgmt_function() where we're successful and do not need to do anything because adapter stopped. For these cases it's correct to pass NULL for fsf_req to _zfcp_dbf_scsi(). Signed-off-by:
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Steffen Maier authored
v4.9 commit aceeffbb ("zfcp: trace full payload of all SAN records (req,resp,iels)") fixed trace data loss of 2.6.38 commit 2c55b750 ("[SCSI] zfcp: Redesign of the debug tracing for SAN records.") necessary for problem determination, e.g. to see the currently active zone set during automatic port scan. While it already saves space by not dumping any empty residual entries of the large successful GPN_FT response (4 pages), there are seldom cases where the GPN_FT response is unsuccessful and likely does not have FC_NS_FID_LAST set in fp_flags so we did not cap the trace record. We typically see such case for an initiator WWPN, which is not in any zone. Cap unsuccessful responses to at least the actual basic CT_IU response plus whatever fits the SAN trace record built-in "payload" buffer just in case there's trailing information of which we would at least see the existence and its beginning. In order not to erroneously cap successful responses, we need to swap calling the trace function and setting the CT / ELS status to success (0). Example trace record pair formatted with zfcpdbf: Timestamp : ... Area : SAN Subarea : 00 Level : 1 Exception : - CPU ID : .. Caller : 0x... Record ID : 1 Tag : fssct_1 Request ID : 0x<request_id> Destination ID : 0x00fffffc SAN req short : 01000000 fc020000 01720ffc 00000000 00000008 SAN req length : 20 | Timestamp : ... Area : SAN Subarea : 00 Level : 1 Exception : - CPU ID : .. Caller : 0x... Record ID : 2 Tag : fsscth2 Request ID : 0x<request_id> Destination ID : 0x00fffffc SAN resp short : 01000000 fc020000 80010000 00090700 00000000 00000000 00000000 00000000 [trailing info] 00000000 00000000 00000000 00000000 [trailing info] SAN resp length: 16384 San resp info : 01000000 fc020000 80010000 00090700 00000000 00000000 00000000 00000000 [trailing info] 00000000 00000000 00000000 00000000 [trailing info] 00000000 00000000 00000000 00000000 [trailing info] 00000000 00000000 00000000 00000000 [trailing info] 00000000 00000000 00000000 00000000 [trailing info] 00000000 00000000 00000000 00000000 [trailing info] 00000000 00000000 00000000 00000000 [trailing info] 00000000 00000000 00000000 00000000 [trailing info] 00000000 00000000 00000000 00000000 [trailing info] 00000000 00000000 00000000 00000000 [trailing info] 00000000 00000000 00000000 00000000 [trailing info] 00000000 00000000 00000000 00000000 [trailing info] 00000000 00000000 00000000 00000000 [trailing info] 00000000 00000000 00000000 00000000 [trailing info] 00000000 00000000 00000000 00000000 [trailing info] The fix saves all but one of the previously associated 64 PAYload trace record chunks of size 256 bytes each. Signed-off-by:
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Benjamin Block authored
Up until now zfcp would just ignore the FCP_RESID_OVER flag in the FCP response IU. When this flag is set, it is possible, in regards to the FCP standard, that the storage-server processes the command normally, up to the point where data is missing and simply ignores those. In this case no CHECK CONDITION would be set, and because we ignored the FCP_RESID_OVER flag we resulted in at least a data loss or even -corruption as a follow-up error, depending on how the applications/layers on top behave. To prevent this, we now set the host-byte of the corresponding scsi_cmnd to DID_ERROR. Other storage-behaviors, where the same condition results in a CHECK CONDITION set in the answer, don't need to be changed as they are handled in the mid-layer already. Following is an example trace record decoded with zfcpdbf from the s390-tools package. We forcefully injected a fc_dl which is one byte too small: Timestamp : ... Area : SCSI Subarea : 00 Level : 3 Exception : - CPU ID : .. Caller : 0x... Record ID : 1 Tag : rsl_err Request ID : 0x... SCSI ID : 0x... SCSI LUN : 0x... SCSI result : 0x00070000 ^^DID_ERROR SCSI retries : 0x.. SCSI allowed : 0x.. SCSI scribble : 0x... SCSI opcode : 2a000000 00000000 08000000 00000000 FCP rsp inf cod: 0x00 FCP rsp IU : 00000000 00000000 00000400 00000001 ^^fr_flags==FCP_RESID_OVER ^^fr_status==SAM_STAT_GOOD ^^^^^^^^fr_resid 00000000 00000000 As of now, we don't actively handle to possibility that a response IU has both flags - FCP_RESID_OVER and FCP_RESID_UNDER - set at once. Reported-by:Luke M. Hopkins <lmhopkin@us.ibm.com> Reviewed-by:
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Steffen Maier authored
Since commit db007fc5 ("[SCSI] Command protection operation"), scsi_eh_prep_cmnd() saves scmd->prot_op and temporarily resets it to SCSI_PROT_NORMAL. Other FCP LLDDs such as qla2xxx and lpfc shield their queuecommand() to only access any of scsi_prot_sg...() if (scsi_get_prot_op(cmd) != SCSI_PROT_NORMAL). Do the same thing for zfcp, which introduced DIX support with commit ef3eb71d ("[SCSI] zfcp: Introduce experimental support for DIF/DIX"). Otherwise, TUR SCSI commands as part of scsi_eh likely fail in zfcp, because the regular SCSI command with DIX protection data, that scsi_eh re-uses in scsi_send_eh_cmnd(), of course still has (scsi_prot_sg_count() != 0) and so zfcp sends down bogus requests to the FCP channel hardware. This causes scsi_eh_test_devices() to have (finish_cmds == 0) [not SCSI device is online or not scsi_eh_tur() failed] so regular SCSI commands, that caused / were affected by scsi_eh, are moved to work_q and scsi_eh_test_devices() itself returns false. In turn, it unnecessarily escalates in our case in scsi_eh_ready_devs() beyond host reset to finally scsi_eh_offline_sdevs() which sets affected SCSI devices offline with the following kernel message: "kernel: sd H:0:T:L: Device offlined - not ready after error recovery" Signed-off-by:
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Benjamin Block authored
Better form and cleans remaining warnings. Found with scripts/coccinelle/misc/boolinit.cocci. Signed-off-by:
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Corentin Labbe authored
drivers/s390/scsi/zfcp_aux.c does not contain any miscdevice so the inclusion of linux/miscdevice.h is unnecessary. [maier@linux.vnet.ibm.com: just for the records, this is in fact a minor missing code cleanup of the following older "feature" which also dropped the only former use of a misc device in zfcp: commit 663e0890 ("[SCSI] zfcp: remove access control tables interface") commit b5dc3c48 ("[SCSI] zfcp: remove access control tables interface (keep sysfs files)") commit 1b33ef23 ("zfcp: remove access control tables interface (port leftovers)")] Signed-off-by:
Corentin Labbe <clabbe.montjoie@gmail.com> Signed-off-by:
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Lukáš Korenčik authored
Use initialization with setup_timer function instead of using init_timer function and data fields. It improves readability. Signed-off-by:
Lukáš Korenčik <xkorenc1@fi.muni.cz> Signed-off-by:
Jiri Slaby <jslaby@suse.cz> Signed-off-by:
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LABBE Corentin authored
The zfcp_qdio_sbale_count function do the same work than sg_nents(). So replace it by sg_nents() for removing duplicate code. Signed-off-by:
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Varun Prakash authored
If cxgbi_ep_connect() is called with valid shost then find associated ndev and use ndev->ifindex to find route. Signed-off-by:
Varun Prakash <varun@chelsio.com> Signed-off-by:
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Christophe JAILLET authored
In the lines above this test, 8 'kzalloc' are performed, but only 7 results are tested. Add the missing one (i.e. '!ioc->port_enable_cmds.reply'). Signed-off-by:
Christophe JAILLET <christophe.jaillet@wanadoo.fr> Signed-off-by:
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Michał Mirosław authored
Regenerate firmware files to make cleaner base for following fix. This removes some unused definitions and reorders some #defines, but the code remains the same. Signed-off-by:
Michał Mirosław <mirq-linux@rere.qmqm.pl> Reviewed-by:
Hannes Reinecke <hare@suse.com> Signed-off-by:
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- 08 Aug, 2017 2 commits
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Michał Mirosław authored
We need to override Kbuild rules for copying shipped files, otherwise aic7xxx_reg.h and aic7xxx_reg_print.c will be ovewritten by old versions. Fixes: 516b7db5Signed-off-by:
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Michał Mirosław authored
ahc_platform_dump_card_state() does nothing. Remove it. Signed-off-by:
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- 07 Aug, 2017 10 commits
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Benjamin Block authored
I have been working with Steffen on zFCP for quite a while now and we decided adding me as a co-maintainer might be a good thing. Acked-by:
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Steffen Maier authored
Scsi_cmnd is an unsuitable argument for eh_device_reset_handler(), eh_target_reset_handler(), and eh_host_reset_handler() which do not have the scope of one single SCSI command. These callbacks tend to use fc_block_scsi_eh() requiring scsi_cmnd. In order to start decoupling above eh callbacks from scsi_cmnd, introduce a new variant of the function called fc_block_rport() taking an fc_rport as argument. Refactor the old fc_block_scsi_eh() to simply delegate to fc_block_rport(). Signed-off-by:
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himanshu.madhani@cavium.com authored
Signed-off-by:
Duane Grigsby <duane.grigsby@cavium.com> Signed-off-by:
Himanshu Madhani <himanshu.madhani@cavium.com> Reviewed-by:
Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by:
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himanshu.madhani@cavium.com authored
Simplified waiting for unregister local/remote FC-NVMe ports to complete cleanup. Signed-off-by:
Darren Trapp <darren.trapp@cavium.com> Signed-off-by:
Anil Gurumurthy <anil.gurumurthy@cavium.com> Signed-off-by:
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Duane Grigsby authored
Add support to the driver to set the exchange threshold value for the number of outstanding AENs. Signed-off-by:
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himanshu.madhani@cavium.com authored
Cc: Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by:
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himanshu.madhani@cavium.com authored
This patch does not change any functionality. Following cleanups have been done as requested by reviewer - Changed waitQ --> waitq - Collapsed multiple debug statements into single - Remove extra parentheses in if-else as per operator precedence - Remove unnecessary casting Cc: Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by:
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Greg Kroah-Hartman authored
It's better to use the DRIVER_ATTR_RW() and DRIVER_ATTR_RO() macros to explicitly show that this is a read/write or read/only sysfs file. So convert the remaining SCSI drivers that use the old style to use the newer macros. Bonus is that this removes some checkpatch.pl warnings :) This is part of a series to drop DRIVER_ATTR() from the tree entirely. Cc: "James E.J. Bottomley" <jejb@linux.vnet.ibm.com> Cc: "Martin K. Petersen" <martin.petersen@oracle.com> Cc: Kashyap Desai <kashyap.desai@broadcom.com> Cc: Sumit Saxena <sumit.saxena@broadcom.com> Cc: Shivasharan S <shivasharan.srikanteshwara@broadcom.com> Cc: Willem Riede <osst@riede.org> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org> Reviewed-by:
Bart Van Assche <bart.vanassche@wdc.com> Signed-off-by:
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Rob Herring authored
Now that we have a custom printf format specifier, convert users of full_name to use %pOF instead. This is preparation to remove storing of the full path string for each node. Signed-off-by:
Rob Herring <robh@kernel.org> Cc: "James E.J. Bottomley" <jejb@linux.vnet.ibm.com> Cc: "Martin K. Petersen" <martin.petersen@oracle.com> Cc: linux-scsi@vger.kernel.org Signed-off-by:
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Prabu Thangamuthu authored
As per internal decision, Joao Pinto will be maintainer for DWC UFS driver. Signed-off-by:
Prabu Thangamuthu <prabut@synopsys.com> Acked-by:
Joao Pinto <Joao.Pinto@synopsys.com> Signed-off-by:
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