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| author |  Stefan Haberland <sth@linux.ibm.com>
| 2023-04-05 16:20:12 +0200 |
|---|---|---|
| committer |  Jens Axboe <axboe@kernel.dk>
| 2023-04-11 19:53:08 -0600 |
| commit | 1cee2975bbabd89df1097c354867192106b058ea (patch) | |
| tree | 56fa8ab2e82746ef1a65170ce91dbf5482bb8986 /arch/s390/include/uapi | |
| parent | s390/dasd: remove unused DASD EER defines (diff) | |
| download | linux-1cee2975bbabd89df1097c354867192106b058ea.tar.gz linux-1cee2975bbabd89df1097c354867192106b058ea.tar.bz2 linux-1cee2975bbabd89df1097c354867192106b058ea.zip | |
s390/dasd: add autoquiesce feature
Add the internal logic to check for autoquiesce triggers and handle
them.
Quiesce and resume are functions that tell Linux to stop/resume
issuing I/Os to a specific DASD.
The DASD driver allows a manual quiesce/resume via ioctl.
Autoquiesce will define an amount of triggers that will lead to
an automatic quiesce if a certain event occurs.
There is no automatic resume.
All events will be reported via DASD Extended Error Reporting (EER)
if configured.
Signed-off-by: Stefan Haberland <sth@linux.ibm.com>
Reviewed-by: Jan Hoeppner <hoeppner@linux.ibm.com>
Reviewed-by: Halil Pasic <pasic@linux.ibm.com>
Link: https://lore.kernel.org/r/20230405142017.2446986-3-sth@linux.ibm.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'arch/s390/include/uapi')
| -rw-r--r-- | arch/s390/include/uapi/asm/dasd.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/s390/include/uapi/asm/dasd.h b/arch/s390/include/uapi/asm/dasd.h index 93d1ccd3304c..9c49c3d67cd5 100644 --- a/arch/s390/include/uapi/asm/dasd.h +++ b/arch/s390/include/uapi/asm/dasd.h @@ -78,6 +78,7 @@ typedef struct dasd_information2_t { * 0x040: give access to raw eckd data * 0x080: enable discard support * 0x100: enable autodisable for IFCC errors (default) + * 0x200: enable requeue of all requests on autoquiesce */ #define DASD_FEATURE_READONLY 0x001 #define DASD_FEATURE_USEDIAG 0x002 @@ -88,6 +89,7 @@ typedef struct dasd_information2_t { #define DASD_FEATURE_USERAW 0x040 #define DASD_FEATURE_DISCARD 0x080 #define DASD_FEATURE_PATH_AUTODISABLE 0x100 +#define DASD_FEATURE_REQUEUEQUIESCE 0x200 #define DASD_FEATURE_DEFAULT DASD_FEATURE_PATH_AUTODISABLE #define DASD_PARTN_BITS 2 |