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@@ -1265,6 +1265,8 @@ dasd_eckd_format_device(struct dasd_device * device,
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int rpt, cyl, head;
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int cplength, datasize;
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int i;
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+ int intensity = 0;
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+ int r0_perm;
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private = (struct dasd_eckd_private *) device->private;
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rpt = recs_per_track(&private->rdc_data, 0, fdata->blksize);
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@@ -1296,9 +1298,17 @@ dasd_eckd_format_device(struct dasd_device * device,
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* Bit 1: write home address, currently not supported
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* Bit 2: invalidate tracks
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* Bit 3: use OS/390 compatible disk layout (cdl)
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+ * Bit 4: do not allow storage subsystem to modify record zero
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* Only some bit combinations do make sense.
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*/
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- switch (fdata->intensity) {
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+ if (fdata->intensity & 0x10) {
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+ r0_perm = 0;
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+ intensity = fdata->intensity & ~0x10;
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+ } else {
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+ r0_perm = 1;
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+ intensity = fdata->intensity;
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+ }
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+ switch (intensity) {
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case 0x00: /* Normal format */
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case 0x08: /* Normal format, use cdl. */
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cplength = 2 + rpt;
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@@ -1335,11 +1345,14 @@ dasd_eckd_format_device(struct dasd_device * device,
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data = fcp->data;
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ccw = fcp->cpaddr;
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- switch (fdata->intensity & ~0x08) {
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+ switch (intensity & ~0x08) {
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case 0x00: /* Normal format. */
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define_extent(ccw++, (struct DE_eckd_data *) data,
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fdata->start_unit, fdata->start_unit,
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DASD_ECKD_CCW_WRITE_CKD, device);
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+ /* grant subsystem permission to format R0 */
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+ if (r0_perm)
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+ ((struct DE_eckd_data *)data)->ga_extended |= 0x04;
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data += sizeof(struct DE_eckd_data);
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ccw[-1].flags |= CCW_FLAG_CC;
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locate_record(ccw++, (struct LO_eckd_data *) data,
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@@ -1373,7 +1386,7 @@ dasd_eckd_format_device(struct dasd_device * device,
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data += sizeof(struct LO_eckd_data);
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break;
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}
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- if (fdata->intensity & 0x01) { /* write record zero */
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+ if (intensity & 0x01) { /* write record zero */
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ect = (struct eckd_count *) data;
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data += sizeof(struct eckd_count);
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ect->cyl = cyl;
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@@ -1388,7 +1401,7 @@ dasd_eckd_format_device(struct dasd_device * device,
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ccw->cda = (__u32)(addr_t) ect;
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ccw++;
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}
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- if ((fdata->intensity & ~0x08) & 0x04) { /* erase track */
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+ if ((intensity & ~0x08) & 0x04) { /* erase track */
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ect = (struct eckd_count *) data;
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data += sizeof(struct eckd_count);
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ect->cyl = cyl;
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@@ -1411,14 +1424,14 @@ dasd_eckd_format_device(struct dasd_device * device,
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ect->kl = 0;
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ect->dl = fdata->blksize;
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/* Check for special tracks 0-1 when formatting CDL */
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- if ((fdata->intensity & 0x08) &&
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+ if ((intensity & 0x08) &&
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fdata->start_unit == 0) {
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if (i < 3) {
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ect->kl = 4;
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ect->dl = sizes_trk0[i] - 4;
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}
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}
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- if ((fdata->intensity & 0x08) &&
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+ if ((intensity & 0x08) &&
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fdata->start_unit == 1) {
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ect->kl = 44;
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ect->dl = LABEL_SIZE - 44;
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