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| author |   Stefan Haberland <sth@linux.ibm.com> | 2022-09-20 21:26:16 +0200 |
|---|---|---|
| committer |   Jens Axboe <axboe@kernel.dk> | 2022-09-21 08:32:51 -0600 |
| commit | 32ff8ce08b47a5fe64ef9827443ba6cc49a659c8 (patch) | |
| tree | 343760d0880b01dbab1e205d1f74f306fb3a78ce /drivers/s390/block/dasd_int.h | |
| parent | s390/dasd: suppress generic error messages for PPRC secondary devices (diff) | |
| download | linux-dev-32ff8ce08b47a5fe64ef9827443ba6cc49a659c8.tar.xz linux-dev-32ff8ce08b47a5fe64ef9827443ba6cc49a659c8.zip | |
s390/dasd: add device ping attribute
Add a function to check if a device is accessible.
This makes mostly sense for copy pair secondary devices but it will work
for all devices.
The sysfs attribute ping is a write only attribute and will issue a NOP
CCW to the device.
In case of success it will return zero. If the device is not accessible
it will return an error code.
Signed-off-by: Stefan Haberland <sth@linux.ibm.com>
Reviewed-by: Jan Hoeppner <hoeppner@linux.ibm.com>
Link: https://lore.kernel.org/r/20220920192616.808070-8-sth@linux.ibm.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/s390/block/dasd_int.h')
| -rw-r--r-- | drivers/s390/block/dasd_int.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/s390/block/dasd_int.h b/drivers/s390/block/dasd_int.h index 3c55c29155ef..c7223c4eba52 100644 --- a/drivers/s390/block/dasd_int.h +++ b/drivers/s390/block/dasd_int.h @@ -439,6 +439,7 @@ struct dasd_discipline { int (*pprc_status)(struct dasd_device *, struct dasd_pprc_data_sc4 *); bool (*pprc_enabled)(struct dasd_device *); int (*copy_pair_swap)(struct dasd_device *, char *, char *); + int (*device_ping)(struct dasd_device *); }; extern struct dasd_discipline *dasd_diag_discipline_pointer; |