diff options
author | Stefan Weinhuber <wein@de.ibm.com> | 2006-03-24 03:15:25 -0800 |
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committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-03-24 07:33:17 -0800 |
commit | 20c644680af1ef9a6b36c0873f59498c98b07ab1 (patch) | |
tree | af2e50faeb690b7aacf7be3480f08f0a6ec0b56f /drivers/s390/block/dasd_int.h | |
parent | 554a826e0a29f1a88e5a5332f0718c059885ec17 (diff) | |
download | linux-20c644680af1ef9a6b36c0873f59498c98b07ab1.tar.bz2 |
[PATCH] s390: dasd extended error reporting
The DASD extended error reporting is a facility that allows to get detailed
information about certain problems in the DASD I/O. This information can be
used to implement fail-over applications that can recover these problems.
Signed-off-by: Stefan Weinhuber <wein@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/s390/block/dasd_int.h')
-rw-r--r-- | drivers/s390/block/dasd_int.h | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/drivers/s390/block/dasd_int.h b/drivers/s390/block/dasd_int.h index 6d7fa30fa0b8..4293ba827523 100644 --- a/drivers/s390/block/dasd_int.h +++ b/drivers/s390/block/dasd_int.h @@ -268,6 +268,23 @@ struct dasd_discipline { extern struct dasd_discipline *dasd_diag_discipline_pointer; + +/* + * Notification numbers for extended error reporting notifications: + * The DASD_EER_DISABLE notification is sent before a dasd_device (and it's + * eer pointer) is freed. The error reporting module needs to do all necessary + * cleanup steps. + * The DASD_EER_TRIGGER notification sends the actual error reports (triggers). + */ +#define DASD_EER_DISABLE 0 +#define DASD_EER_TRIGGER 1 + +/* Trigger IDs for extended error reporting DASD_EER_TRIGGER notification */ +#define DASD_EER_FATALERROR 1 +#define DASD_EER_NOPATH 2 +#define DASD_EER_STATECHANGE 3 +#define DASD_EER_PPRCSUSPEND 4 + struct dasd_device { /* Block device stuff. */ struct gendisk *gdp; @@ -281,6 +298,9 @@ struct dasd_device { unsigned long flags; /* per device flags */ unsigned short features; /* copy of devmap-features (read-only!) */ + /* extended error reporting stuff (eer) */ + struct dasd_ccw_req *eer_cqr; + /* Device discipline stuff. */ struct dasd_discipline *discipline; struct dasd_discipline *base_discipline; @@ -326,6 +346,8 @@ struct dasd_device { /* per device flags */ #define DASD_FLAG_DSC_ERROR 2 /* return -EIO when disconnected */ #define DASD_FLAG_OFFLINE 3 /* device is in offline processing */ +#define DASD_FLAG_EER_SNSS 4 /* A SNSS is required */ +#define DASD_FLAG_EER_IN_USE 5 /* A SNSS request is running */ void dasd_put_device_wake(struct dasd_device *); @@ -545,6 +567,30 @@ dasd_era_t dasd_9336_erp_examine(struct dasd_ccw_req *, struct irb *); dasd_era_t dasd_9343_erp_examine(struct dasd_ccw_req *, struct irb *); struct dasd_ccw_req *dasd_9343_erp_action(struct dasd_ccw_req *); +/* externals in dasd_eer.c */ +#ifdef CONFIG_DASD_EER +int dasd_eer_init(void); +void dasd_eer_exit(void); +int dasd_eer_enable(struct dasd_device *); +void dasd_eer_disable(struct dasd_device *); +void dasd_eer_write(struct dasd_device *, struct dasd_ccw_req *cqr, + unsigned int id); +void dasd_eer_snss(struct dasd_device *); + +static inline int dasd_eer_enabled(struct dasd_device *device) +{ + return device->eer_cqr != NULL; +} +#else +#define dasd_eer_init() (0) +#define dasd_eer_exit() do { } while (0) +#define dasd_eer_enable(d) (0) +#define dasd_eer_disable(d) do { } while (0) +#define dasd_eer_write(d,c,i) do { } while (0) +#define dasd_eer_snss(d) do { } while (0) +#define dasd_eer_enabled(d) (0) +#endif /* CONFIG_DASD_ERR */ + #endif /* __KERNEL__ */ #endif /* DASD_H */ |