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| author |   Jan Höppner <hoeppner@linux.ibm.com> | 2018-07-03 10:56:51 +0200 |
|---|---|---|
| committer |   Vasily Gorbik <gor@linux.ibm.com> | 2019-07-11 20:39:54 +0200 |
| commit | 9e12e54c7a8f616190beffb0f7ce778a86aec175 (patch) | |
| tree | ad64419a0817aa9e476abac0e65effdb4248b2c2 /drivers/s390/block/dasd_int.h | |
| parent | s390/dasd: Add discard support for ESE volumes (diff) | |
| download | linux-dev-9e12e54c7a8f616190beffb0f7ce778a86aec175.tar.xz linux-dev-9e12e54c7a8f616190beffb0f7ce778a86aec175.zip | |
s390/dasd: Handle out-of-space constraint
The storage server issues three different types of out-of-space messages
whenever the Extent Pool or Extent Repository space runs short. When a
configured warning watermark is reached, the physical space is
completeley exhausted, or the capacity constraints have been relieved, a
message is received.
A log entry for the sysadmin to react to is generated in any case. In
case the physical space is completely exhausted, sense data that reads
"no space left on device" is received. In this case, currently running
I/O will be blocked until space has either been released or added to the
extent pool, and a relieve message was received via an attention
interrupt.
Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
Reviewed-by: Stefan Haberland <sth@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Diffstat (limited to 'drivers/s390/block/dasd_int.h')
| -rw-r--r-- | drivers/s390/block/dasd_int.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/s390/block/dasd_int.h b/drivers/s390/block/dasd_int.h index aa4fd0d206bb..91c9f9586e0f 100644 --- a/drivers/s390/block/dasd_int.h +++ b/drivers/s390/block/dasd_int.h @@ -386,6 +386,7 @@ struct dasd_discipline { int (*ext_pool_cap_at_warnlevel)(struct dasd_device *); int (*ext_pool_warn_thrshld)(struct dasd_device *); int (*ext_pool_oos)(struct dasd_device *); + int (*ext_pool_exhaust)(struct dasd_device *, struct dasd_ccw_req *); struct dasd_ccw_req *(*ese_format)(struct dasd_device *, struct dasd_ccw_req *); void (*ese_read)(struct dasd_ccw_req *); }; @@ -407,6 +408,7 @@ extern struct dasd_discipline *dasd_diag_discipline_pointer; #define DASD_EER_NOPATH 2 #define DASD_EER_STATECHANGE 3 #define DASD_EER_PPRCSUSPEND 4 +#define DASD_EER_NOSPC 5 /* DASD path handling */ @@ -581,6 +583,7 @@ struct dasd_queue { #define DASD_STOPPED_SU 16 /* summary unit check handling */ #define DASD_STOPPED_PM 32 /* pm state transition */ #define DASD_UNRESUMED_PM 64 /* pm resume failed state */ +#define DASD_STOPPED_NOSPC 128 /* no space left */ /* per device flags */ #define DASD_FLAG_OFFLINE 3 /* device is in offline processing */ @@ -776,6 +779,8 @@ int dasd_generic_restore_device(struct ccw_device *); enum uc_todo dasd_generic_uc_handler(struct ccw_device *, struct irb *); void dasd_generic_path_event(struct ccw_device *, int *); int dasd_generic_verify_path(struct dasd_device *, __u8); +void dasd_generic_space_exhaust(struct dasd_device *, struct dasd_ccw_req *); +void dasd_generic_space_avail(struct dasd_device *); int dasd_generic_read_dev_chars(struct dasd_device *, int, void *, int); char *dasd_get_sense(struct irb *); |