Commit 86c58705 authored by Jason J. Herne's avatar Jason J. Herne Committed by Thomas Huth
Browse files

s390-bios: cio error handling 



Add verbose error output for when unexpected i/o errors happen. This eases the
burden of debugging and reporting i/o errors. No error information is printed
in the success case, here is an example of what is output on error:

cio device error
  ssid  : 0x0000000000000000
  cssid : 0x0000000000000000
  sch_no: 0x0000000000000000

Interrupt Response Block Data:
    Function Ctrl : [Start]
    Activity Ctrl : [Start-Pending]
    Status Ctrl : [Alert] [Primary] [Secondary] [Status-Pending]
    Device Status : [Unit-Check]
    Channel Status :
    cpa=: 0x000000007f8d6038
    prev_ccw=: 0x0000000000000000
    this_ccw=: 0x0000000000000000
Eckd Dasd Sense Data (fmt 32-bytes):
    Sense Condition Flags :
    Residual Count     =: 0x0000000000000000
    Phys Drive ID      =: 0x000000000000009e
    low cyl address    =: 0x0000000000000000
    head addr & hi cyl =: 0x0000000000000000
    format/message     =: 0x0000000000000008
    fmt-dependent[0-7] =: 0x0000000000000004
    fmt-dependent[8-15]=: 0xe561282305082fff
    prog action code   =: 0x0000000000000016
    Configuration info =: 0x00000000000040e0
    mcode / hi-cyl     =: 0x0000000000000000
    cyl & head addr [0]=: 0x0000000000000000
    cyl & head addr [1]=: 0x0000000000000000
    cyl & head addr [2]=: 0x0000000000000000

The Sense Data section is currently only printed for ECKD DASD.

Signed-off-by: default avatarJason J. Herne <jjherne@linux.ibm.com>
Reviewed-by: default avatarCornelia Huck <cohuck@redhat.com>
Message-Id: <1554388475-18329-10-git-send-email-jjherne@linux.ibm.com>
Signed-off-by: default avatarThomas Huth <thuth@redhat.com>
parent 3083a1bb

pc-bios/s390-ccw/cio.c

+235 −0
Original line number Diff line number Diff line
@@ -85,6 +85,228 @@ static bool irb_error(Irb *irb) 
    return irb->scsw.dstat != (SCSW_DSTAT_DEVEND | SCSW_DSTAT_CHEND);

}



static void print_eckd_dasd_sense_data(SenseDataEckdDasd *sd)

{

    char msgline[512];



    if (sd->config_info & 0x8000) {

        sclp_print("Eckd Dasd Sense Data (fmt 24-bytes):\n");

    } else {

        sclp_print("Eckd Dasd Sense Data (fmt 32-bytes):\n");

    }



    strcat(msgline, "    Sense Condition Flags :");

    if (sd->common_status & SNS_STAT0_CMD_REJECT) {

        strcat(msgline, " [Cmd-Reject]");

    }

    if (sd->common_status & SNS_STAT0_INTERVENTION_REQ) {

        strcat(msgline, " [Intervention-Required]");

    }

    if (sd->common_status & SNS_STAT0_BUS_OUT_CHECK) {

        strcat(msgline, " [Bus-Out-Parity-Check]");

    }

    if (sd->common_status & SNS_STAT0_EQUIPMENT_CHECK) {

        strcat(msgline, " [Equipment-Check]");

    }

    if (sd->common_status & SNS_STAT0_DATA_CHECK) {

        strcat(msgline, " [Data-Check]");

    }

    if (sd->common_status & SNS_STAT0_OVERRUN) {

        strcat(msgline, " [Overrun]");

    }

    if (sd->common_status & SNS_STAT0_INCOMPL_DOMAIN) {

        strcat(msgline, " [Incomplete-Domain]");

    }



    if (sd->status[0] & SNS_STAT1_PERM_ERR) {

        strcat(msgline, " [Permanent-Error]");

    }

    if (sd->status[0] & SNS_STAT1_INV_TRACK_FORMAT) {

        strcat(msgline, " [Invalid-Track-Fmt]");

    }

    if (sd->status[0] & SNS_STAT1_EOC) {

        strcat(msgline, " [End-of-Cyl]");

    }

    if (sd->status[0] & SNS_STAT1_MESSAGE_TO_OPER) {

        strcat(msgline, " [Operator-Msg]");

    }

    if (sd->status[0] & SNS_STAT1_NO_REC_FOUND) {

        strcat(msgline, " [No-Record-Found]");

    }

    if (sd->status[0] & SNS_STAT1_FILE_PROTECTED) {

        strcat(msgline, " [File-Protected]");

    }

    if (sd->status[0] & SNS_STAT1_WRITE_INHIBITED) {

        strcat(msgline, " [Write-Inhibited]");

    }

    if (sd->status[0] & SNS_STAT1_IMPRECISE_END) {

        strcat(msgline, " [Imprecise-Ending]");

    }



    if (sd->status[1] & SNS_STAT2_REQ_INH_WRITE) {

        strcat(msgline, " [Req-Inhibit-Write]");

    }

    if (sd->status[1] & SNS_STAT2_CORRECTABLE) {

        strcat(msgline, " [Correctable-Data-Check]");

    }

    if (sd->status[1] & SNS_STAT2_FIRST_LOG_ERR) {

        strcat(msgline, " [First-Error-Log]");

    }

    if (sd->status[1] & SNS_STAT2_ENV_DATA_PRESENT) {

        strcat(msgline, " [Env-Data-Present]");

    }

    if (sd->status[1] & SNS_STAT2_IMPRECISE_END) {

        strcat(msgline, " [Imprecise-End]");

    }

    strcat(msgline, "\n");

    sclp_print(msgline);



    print_int("    Residual Count     =", sd->res_count);

    print_int("    Phys Drive ID      =", sd->phys_drive_id);

    print_int("    low cyl address    =", sd->low_cyl_addr);

    print_int("    head addr & hi cyl =", sd->head_high_cyl_addr);

    print_int("    format/message     =", sd->fmt_msg);

    print_int("    fmt-dependent[0-7] =", sd->fmt_dependent_info[0]);

    print_int("    fmt-dependent[8-15]=", sd->fmt_dependent_info[1]);

    print_int("    prog action code   =", sd->program_action_code);

    print_int("    Configuration info =", sd->config_info);

    print_int("    mcode / hi-cyl     =", sd->mcode_hicyl);

    print_int("    cyl & head addr [0]=", sd->cyl_head_addr[0]);

    print_int("    cyl & head addr [1]=", sd->cyl_head_addr[1]);

    print_int("    cyl & head addr [2]=", sd->cyl_head_addr[2]);

}



static void print_irb_err(Irb *irb)

{

    uint64_t this_ccw = *(uint64_t *)u32toptr(irb->scsw.cpa);

    uint64_t prev_ccw = *(uint64_t *)u32toptr(irb->scsw.cpa - 8);

    char msgline[256];



    sclp_print("Interrupt Response Block Data:\n");



    strcat(msgline, "    Function Ctrl :");

    if (irb->scsw.ctrl & SCSW_FCTL_START_FUNC) {

        strcat(msgline, " [Start]");

    }

    if (irb->scsw.ctrl & SCSW_FCTL_HALT_FUNC) {

        strcat(msgline, " [Halt]");

    }

    if (irb->scsw.ctrl & SCSW_FCTL_CLEAR_FUNC) {

        strcat(msgline, " [Clear]");

    }

    strcat(msgline, "\n");

    sclp_print(msgline);



    msgline[0] = '\0';

    strcat(msgline, "    Activity Ctrl :");

    if (irb->scsw.ctrl & SCSW_ACTL_RESUME_PEND) {

        strcat(msgline, " [Resume-Pending]");

    }

    if (irb->scsw.ctrl & SCSW_ACTL_START_PEND) {

        strcat(msgline, " [Start-Pending]");

    }

    if (irb->scsw.ctrl & SCSW_ACTL_HALT_PEND) {

        strcat(msgline, " [Halt-Pending]");

    }

    if (irb->scsw.ctrl & SCSW_ACTL_CLEAR_PEND) {

        strcat(msgline, " [Clear-Pending]");

    }

    if (irb->scsw.ctrl & SCSW_ACTL_CH_ACTIVE) {

        strcat(msgline, " [Channel-Active]");

    }

    if (irb->scsw.ctrl & SCSW_ACTL_DEV_ACTIVE) {

        strcat(msgline, " [Device-Active]");

    }

    if (irb->scsw.ctrl & SCSW_ACTL_SUSPENDED) {

        strcat(msgline, " [Suspended]");

    }

    strcat(msgline, "\n");

    sclp_print(msgline);



    msgline[0] = '\0';

    strcat(msgline, "    Status Ctrl :");

    if (irb->scsw.ctrl & SCSW_SCTL_ALERT) {

        strcat(msgline, " [Alert]");

    }

    if (irb->scsw.ctrl & SCSW_SCTL_INTERMED) {

        strcat(msgline, " [Intermediate]");

    }

    if (irb->scsw.ctrl & SCSW_SCTL_PRIMARY) {

        strcat(msgline, " [Primary]");

    }

    if (irb->scsw.ctrl & SCSW_SCTL_SECONDARY) {

        strcat(msgline, " [Secondary]");

    }

    if (irb->scsw.ctrl & SCSW_SCTL_STATUS_PEND) {

        strcat(msgline, " [Status-Pending]");

    }



    strcat(msgline, "\n");

    sclp_print(msgline);



    msgline[0] = '\0';

    strcat(msgline, "    Device Status :");

    if (irb->scsw.dstat & SCSW_DSTAT_ATTN) {

        strcat(msgline, " [Attention]");

    }

    if (irb->scsw.dstat & SCSW_DSTAT_STATMOD) {

        strcat(msgline, " [Status-Modifier]");

    }

    if (irb->scsw.dstat & SCSW_DSTAT_CUEND) {

        strcat(msgline, " [Ctrl-Unit-End]");

    }

    if (irb->scsw.dstat & SCSW_DSTAT_BUSY) {

        strcat(msgline, " [Busy]");

    }

    if (irb->scsw.dstat & SCSW_DSTAT_CHEND) {

        strcat(msgline, " [Channel-End]");

    }

    if (irb->scsw.dstat & SCSW_DSTAT_DEVEND) {

        strcat(msgline, " [Device-End]");

    }

    if (irb->scsw.dstat & SCSW_DSTAT_UCHK) {

        strcat(msgline, " [Unit-Check]");

    }

    if (irb->scsw.dstat & SCSW_DSTAT_UEXCP) {

        strcat(msgline, " [Unit-Exception]");

    }

    strcat(msgline, "\n");

    sclp_print(msgline);



    msgline[0] = '\0';

    strcat(msgline, "    Channel Status :");

    if (irb->scsw.cstat & SCSW_CSTAT_PCINT) {

        strcat(msgline, " [Program-Ctrl-Interruption]");

    }

    if (irb->scsw.cstat & SCSW_CSTAT_BADLEN) {

        strcat(msgline, " [Incorrect-Length]");

    }

    if (irb->scsw.cstat & SCSW_CSTAT_PROGCHK) {

        strcat(msgline, " [Program-Check]");

    }

    if (irb->scsw.cstat & SCSW_CSTAT_PROTCHK) {

        strcat(msgline, " [Protection-Check]");

    }

    if (irb->scsw.cstat & SCSW_CSTAT_CHDCHK) {

        strcat(msgline, " [Channel-Data-Check]");

    }

    if (irb->scsw.cstat & SCSW_CSTAT_CHCCHK) {

        strcat(msgline, " [Channel-Ctrl-Check]");

    }

    if (irb->scsw.cstat & SCSW_CSTAT_ICCHK) {

        strcat(msgline, " [Interface-Ctrl-Check]");

    }

    if (irb->scsw.cstat & SCSW_CSTAT_CHAINCHK) {

        strcat(msgline, " [Chaining-Check]");

    }

    strcat(msgline, "\n");

    sclp_print(msgline);



    print_int("    cpa=", irb->scsw.cpa);

    print_int("    prev_ccw=", prev_ccw);

    print_int("    this_ccw=", this_ccw);

}



/*

 * Handles executing ssch, tsch and returns the irb obtained from tsch.

 * Returns 0 on success, -1 if unexpected status pending and we need to retry,
@@ -180,6 +402,19 @@ int do_cio(SubChannelId schid, uint16_t cutype, uint32_t ccw_addr, int fmt) 
            continue;

        }



        sclp_print("cio device error\n");

        print_int("  ssid  ", schid.ssid);

        print_int("  cssid ", schid.cssid);

        print_int("  sch_no", schid.sch_no);

        print_int("  ctrl-unit type", cutype);

        sclp_print("\n");

        print_irb_err(&irb);

        if (cutype == CU_TYPE_DASD_3990 || cutype == CU_TYPE_DASD_2107 ||

            cutype == CU_TYPE_UNKNOWN) {

            if (!basic_sense(schid, cutype, &sd, sizeof(sd))) {

                print_eckd_dasd_sense_data(&sd);

            }

        }

        rc = -1;

        break;

    }

pc-bios/s390-ccw/libc.h

+11 −0
Original line number Diff line number Diff line
@@ -67,6 +67,17 @@ static inline size_t strlen(const char *str) 
    return i;

}



static inline char *strcat(char *dest, const char *src)

{

    int i;

    char *dest_end = dest + strlen(dest);



    for (i = 0; i <= strlen(src); i++) {

        dest_end[i] = src[i];

    }

    return dest;

}



static inline int isdigit(int c)

{

    return (c >= '0') && (c <= '9');