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| author | Stefan Haberland <sth@linux.ibm.com> | 2022-09-20 22:26:11 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2022-09-21 17:32:50 +0300 |
| commit | 3f217cceb6846e7533511fc69bc774cdba37ff7d (patch) | |
| tree | 6b7d03bc9c3cb922a9efecb00613e4579bb360b3 /drivers/s390/block/dasd_int.h | |
| parent | 2b43bf061b2e1b67561cbb1f6f305421f5fc86af (diff) | |
| download | linux-3f217cceb6846e7533511fc69bc774cdba37ff7d.tar.xz | |
s390/dasd: add query PPRC function
Add function to query the Peer-to-Peer-Remote-Copy (PPRC) state of a
device by reading the related structure through a read subsystem data call.
Signed-off-by: Stefan Haberland <sth@linux.ibm.com>
Reviewed-by: Jan Hoeppner <hoeppner@linux.ibm.com>
Link: https://lore.kernel.org/r/20220920192616.808070-3-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 | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/drivers/s390/block/dasd_int.h b/drivers/s390/block/dasd_int.h index 333a399f754e..39316020529d 100644 --- a/drivers/s390/block/dasd_int.h +++ b/drivers/s390/block/dasd_int.h @@ -260,6 +260,37 @@ struct dasd_uid { }; /* + * PPRC Status data + */ +struct dasd_pprc_header { + __u8 entries; /* 0 Number of device entries */ + __u8 unused; /* 1 unused */ + __u16 entry_length; /* 2-3 Length of device entry */ + __u32 unused2; /* 4-7 unused */ +} __packed; + +struct dasd_pprc_dev_info { + __u8 state; /* 0 Copy State */ + __u8 flags; /* 1 Flags */ + __u8 reserved1[2]; /* 2-3 reserved */ + __u8 prim_lss; /* 4 Primary device LSS */ + __u8 primary; /* 5 Primary device address */ + __u8 sec_lss; /* 6 Secondary device LSS */ + __u8 secondary; /* 7 Secondary device address */ + __u16 pprc_id; /* 8-9 Peer-to-Peer Remote Copy ID */ + __u8 reserved2[12]; /* 10-21 reserved */ + __u16 prim_cu_ssid; /* 22-23 Pimary Control Unit SSID */ + __u8 reserved3[12]; /* 24-35 reserved */ + __u16 sec_cu_ssid; /* 36-37 Secondary Control Unit SSID */ + __u8 reserved4[90]; /* 38-127 reserved */ +} __packed; + +struct dasd_pprc_data_sc4 { + struct dasd_pprc_header header; + struct dasd_pprc_dev_info dev_info[5]; +} __packed; + +/* * the struct dasd_discipline is * sth like a table of virtual functions, if you think of dasd_eckd * inheriting dasd... @@ -387,6 +418,7 @@ struct dasd_discipline { struct dasd_ccw_req *(*ese_format)(struct dasd_device *, struct dasd_ccw_req *, struct irb *); int (*ese_read)(struct dasd_ccw_req *, struct irb *); + int (*pprc_status)(struct dasd_device *, struct dasd_pprc_data_sc4 *); }; extern struct dasd_discipline *dasd_diag_discipline_pointer; |