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| author | Stefan Haberland <stefan.haberland@de.ibm.com> | 2016-03-18 09:42:13 +0100 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2016-04-15 18:16:37 +0200 |
| commit | 5a3b7b112884f80ff19b18028fabeb4f9c035518 (patch) | |
| tree | b1b743c481c829d26fdb97043f446f9f0d682b4f /drivers/s390/block/dasd_eckd.h | |
| parent | s390: add CPU_BIG_ENDIAN config option (diff) | |
| download | linux-5a3b7b112884f80ff19b18028fabeb4f9c035518.tar.xz linux-5a3b7b112884f80ff19b18028fabeb4f9c035518.zip | |
s390/dasd: add query host access to volume support
With this feature, applications can query if a DASD volume is online
to another operating system instances by checking the online status of
all attached hosts from the storage server.
Reviewed-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Stefan Haberland <stefan.haberland@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390/block/dasd_eckd.h')
| -rw-r--r-- | drivers/s390/block/dasd_eckd.h | 33 |
1 files changed, 32 insertions, 1 deletions
diff --git a/drivers/s390/block/dasd_eckd.h b/drivers/s390/block/dasd_eckd.h index 6d9a6d3517cd..862ee4291abd 100644 --- a/drivers/s390/block/dasd_eckd.h +++ b/drivers/s390/block/dasd_eckd.h @@ -53,6 +53,7 @@ */ #define PSF_ORDER_PRSSD 0x18 #define PSF_ORDER_CUIR_RESPONSE 0x1A +#define PSF_SUBORDER_QHA 0x1C #define PSF_ORDER_SSC 0x1D /* @@ -81,6 +82,8 @@ #define ATTENTION_LENGTH_CUIR 0x0e #define ATTENTION_FORMAT_CUIR 0x01 +#define DASD_ECKD_PG_GROUPED 0x10 + /* * Size that is reportet for large volumes in the old 16-bit no_cyl field */ @@ -403,13 +406,41 @@ struct dasd_psf_cuir_response { __u8 ssid; } __packed; +struct dasd_ckd_path_group_entry { + __u8 status_flags; + __u8 pgid[11]; + __u8 sysplex_name[8]; + __u32 timestamp; + __u32 cylinder; + __u8 reserved[4]; +} __packed; + +struct dasd_ckd_host_information { + __u8 access_flags; + __u8 entry_size; + __u16 entry_count; + __u8 entry[16390]; +} __packed; + +struct dasd_psf_query_host_access { + __u8 access_flag; + __u8 version; + __u16 CKD_length; + __u16 SCSI_length; + __u8 unused[10]; + __u8 host_access_information[16394]; +} __packed; + /* * Perform Subsystem Function - Prepare for Read Subsystem Data */ struct dasd_psf_prssd_data { unsigned char order; unsigned char flags; - unsigned char reserved[4]; + unsigned char reserved1; + unsigned char reserved2; + unsigned char lss; + unsigned char volume; unsigned char suborder; unsigned char varies[5]; } __attribute__ ((packed)); |