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s390/dasd: Report ESE capability and format mode at device online

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Extend the device information line logged when a volume comes online with
the ESE hardware capability and the on-disk format mode. The format mode
(full or on demand) is derived from the on-disk format label alone, so a
volume that is not backed by ESE hardware but was still formatted on
demand is reported correctly.

Reviewed-by: Jan Höppner <hoeppner@linux.ibm.com>
Signed-off-by: Stefan Haberland <sth@linux.ibm.com>
Link: https://patch.msgid.link/20260805111612.1285190-18-sth@linux.ibm.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Stefan Haberland
2026-08-05 13:16:10 +02:00
committed by Jens Axboe
parent 268e40548d
commit 6c1be943fd
1 changed files with 18 additions and 3 deletions
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21
drivers/s390/block/dasd_eckd.c
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@@ -2522,6 +2522,7 @@ static int dasd_eckd_end_analysis(struct dasd_block *block)
struct dasd_device *device = block->base;
struct dasd_eckd_private *private = device->private;
struct eckd_count *count_area;
const char *ese_str, *fmt_str;
unsigned int sb, blk_per_trk;
int status, i;
struct dasd_ccw_req *init_cqr;
@@ -2608,15 +2609,29 @@ static int dasd_eckd_end_analysis(struct dasd_block *block)
private->rdc_data.trk_per_cyl *
blk_per_trk);
/*
* Report the ESE hardware capability and the format mode. The mode
* comes from dasd_eckd_on_demand_format() (the on-disk label, or the
* ESE state when no label is present), matching the on_demand_formatting
* sysfs attribute.
*/
ese_str = dasd_eckd_ese_capable(device) ? ", ESE" : "";
fmt_str = "";
if (dasd_eckd_on_demand_format(device))
fmt_str = ", on-demand format";
else if (dasd_eckd_ese_capable(device))
fmt_str = ", full format";
dev_info(&device->cdev->dev,
"DASD with %u KB/block, %lu KB total size, %u KB/track, "
"%s\n", (block->bp_block >> 10),
"DASD with %u KB/block, %lu KB total size, %u KB/track, %s%s%s\n",
(block->bp_block >> 10),
(((unsigned long) private->real_cyl *
private->rdc_data.trk_per_cyl *
blk_per_trk * (block->bp_block >> 9)) >> 1),
((blk_per_trk * block->bp_block) >> 10),
private->uses_cdl ?
"compatible disk layout" : "linux disk layout");
"compatible disk layout" : "linux disk layout",
ese_str, fmt_str);
return 0;
}