12c3a54848
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: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
278 lines
10 KiB
C
278 lines
10 KiB
C
/*
|
|
* File...........: linux/drivers/s390/block/dasd.c
|
|
* Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com>
|
|
* Bugreports.to..: <Linux390@de.ibm.com>
|
|
* (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 1999,2000
|
|
*
|
|
* This file is the interface of the DASD device driver, which is exported to user space
|
|
* any future changes wrt the API will result in a change of the APIVERSION reported
|
|
* to userspace by the DASDAPIVER-ioctl
|
|
*
|
|
*/
|
|
|
|
#ifndef DASD_H
|
|
#define DASD_H
|
|
#include <linux/ioctl.h>
|
|
|
|
#define DASD_IOCTL_LETTER 'D'
|
|
|
|
#define DASD_API_VERSION 6
|
|
|
|
/*
|
|
* struct dasd_information2_t
|
|
* represents any data about the device, which is visible to userspace.
|
|
* including foramt and featueres.
|
|
*/
|
|
typedef struct dasd_information2_t {
|
|
unsigned int devno; /* S/390 devno */
|
|
unsigned int real_devno; /* for aliases */
|
|
unsigned int schid; /* S/390 subchannel identifier */
|
|
unsigned int cu_type : 16; /* from SenseID */
|
|
unsigned int cu_model : 8; /* from SenseID */
|
|
unsigned int dev_type : 16; /* from SenseID */
|
|
unsigned int dev_model : 8; /* from SenseID */
|
|
unsigned int open_count;
|
|
unsigned int req_queue_len;
|
|
unsigned int chanq_len; /* length of chanq */
|
|
char type[4]; /* from discipline.name, 'none' for unknown */
|
|
unsigned int status; /* current device level */
|
|
unsigned int label_block; /* where to find the VOLSER */
|
|
unsigned int FBA_layout; /* fixed block size (like AIXVOL) */
|
|
unsigned int characteristics_size;
|
|
unsigned int confdata_size;
|
|
char characteristics[64]; /* from read_device_characteristics */
|
|
char configuration_data[256]; /* from read_configuration_data */
|
|
unsigned int format; /* format info like formatted/cdl/ldl/... */
|
|
unsigned int features; /* dasd features like 'ro',... */
|
|
unsigned int reserved0; /* reserved for further use ,... */
|
|
unsigned int reserved1; /* reserved for further use ,... */
|
|
unsigned int reserved2; /* reserved for further use ,... */
|
|
unsigned int reserved3; /* reserved for further use ,... */
|
|
unsigned int reserved4; /* reserved for further use ,... */
|
|
unsigned int reserved5; /* reserved for further use ,... */
|
|
unsigned int reserved6; /* reserved for further use ,... */
|
|
unsigned int reserved7; /* reserved for further use ,... */
|
|
} dasd_information2_t;
|
|
|
|
/*
|
|
* values to be used for dasd_information_t.format
|
|
* 0x00: NOT formatted
|
|
* 0x01: Linux disc layout
|
|
* 0x02: Common disc layout
|
|
*/
|
|
#define DASD_FORMAT_NONE 0
|
|
#define DASD_FORMAT_LDL 1
|
|
#define DASD_FORMAT_CDL 2
|
|
/*
|
|
* values to be used for dasd_information_t.features
|
|
* 0x00: default features
|
|
* 0x01: readonly (ro)
|
|
* 0x02: use diag discipline (diag)
|
|
*/
|
|
#define DASD_FEATURE_DEFAULT 0
|
|
#define DASD_FEATURE_READONLY 1
|
|
#define DASD_FEATURE_USEDIAG 2
|
|
|
|
#define DASD_PARTN_BITS 2
|
|
|
|
/*
|
|
* struct dasd_information_t
|
|
* represents any data about the data, which is visible to userspace
|
|
*/
|
|
typedef struct dasd_information_t {
|
|
unsigned int devno; /* S/390 devno */
|
|
unsigned int real_devno; /* for aliases */
|
|
unsigned int schid; /* S/390 subchannel identifier */
|
|
unsigned int cu_type : 16; /* from SenseID */
|
|
unsigned int cu_model : 8; /* from SenseID */
|
|
unsigned int dev_type : 16; /* from SenseID */
|
|
unsigned int dev_model : 8; /* from SenseID */
|
|
unsigned int open_count;
|
|
unsigned int req_queue_len;
|
|
unsigned int chanq_len; /* length of chanq */
|
|
char type[4]; /* from discipline.name, 'none' for unknown */
|
|
unsigned int status; /* current device level */
|
|
unsigned int label_block; /* where to find the VOLSER */
|
|
unsigned int FBA_layout; /* fixed block size (like AIXVOL) */
|
|
unsigned int characteristics_size;
|
|
unsigned int confdata_size;
|
|
char characteristics[64]; /* from read_device_characteristics */
|
|
char configuration_data[256]; /* from read_configuration_data */
|
|
} dasd_information_t;
|
|
|
|
/*
|
|
* Read Subsystem Data - Perfomance Statistics
|
|
*/
|
|
typedef struct dasd_rssd_perf_stats_t {
|
|
unsigned char invalid:1;
|
|
unsigned char format:3;
|
|
unsigned char data_format:4;
|
|
unsigned char unit_address;
|
|
unsigned short device_status;
|
|
unsigned int nr_read_normal;
|
|
unsigned int nr_read_normal_hits;
|
|
unsigned int nr_write_normal;
|
|
unsigned int nr_write_fast_normal_hits;
|
|
unsigned int nr_read_seq;
|
|
unsigned int nr_read_seq_hits;
|
|
unsigned int nr_write_seq;
|
|
unsigned int nr_write_fast_seq_hits;
|
|
unsigned int nr_read_cache;
|
|
unsigned int nr_read_cache_hits;
|
|
unsigned int nr_write_cache;
|
|
unsigned int nr_write_fast_cache_hits;
|
|
unsigned int nr_inhibit_cache;
|
|
unsigned int nr_bybass_cache;
|
|
unsigned int nr_seq_dasd_to_cache;
|
|
unsigned int nr_dasd_to_cache;
|
|
unsigned int nr_cache_to_dasd;
|
|
unsigned int nr_delayed_fast_write;
|
|
unsigned int nr_normal_fast_write;
|
|
unsigned int nr_seq_fast_write;
|
|
unsigned int nr_cache_miss;
|
|
unsigned char status2;
|
|
unsigned int nr_quick_write_promotes;
|
|
unsigned char reserved;
|
|
unsigned short ssid;
|
|
unsigned char reseved2[96];
|
|
} __attribute__((packed)) dasd_rssd_perf_stats_t;
|
|
|
|
/*
|
|
* struct profile_info_t
|
|
* holds the profinling information
|
|
*/
|
|
typedef struct dasd_profile_info_t {
|
|
unsigned int dasd_io_reqs; /* number of requests processed at all */
|
|
unsigned int dasd_io_sects; /* number of sectors processed at all */
|
|
unsigned int dasd_io_secs[32]; /* histogram of request's sizes */
|
|
unsigned int dasd_io_times[32]; /* histogram of requests's times */
|
|
unsigned int dasd_io_timps[32]; /* histogram of requests's times per sector */
|
|
unsigned int dasd_io_time1[32]; /* histogram of time from build to start */
|
|
unsigned int dasd_io_time2[32]; /* histogram of time from start to irq */
|
|
unsigned int dasd_io_time2ps[32]; /* histogram of time from start to irq */
|
|
unsigned int dasd_io_time3[32]; /* histogram of time from irq to end */
|
|
unsigned int dasd_io_nr_req[32]; /* histogram of # of requests in chanq */
|
|
} dasd_profile_info_t;
|
|
|
|
/*
|
|
* struct format_data_t
|
|
* represents all data necessary to format a dasd
|
|
*/
|
|
typedef struct format_data_t {
|
|
int start_unit; /* from track */
|
|
int stop_unit; /* to track */
|
|
int blksize; /* sectorsize */
|
|
int intensity;
|
|
} format_data_t;
|
|
|
|
/*
|
|
* values to be used for format_data_t.intensity
|
|
* 0/8: normal format
|
|
* 1/9: also write record zero
|
|
* 3/11: also write home address
|
|
* 4/12: invalidate track
|
|
*/
|
|
#define DASD_FMT_INT_FMT_R0 1 /* write record zero */
|
|
#define DASD_FMT_INT_FMT_HA 2 /* write home address, also set FMT_R0 ! */
|
|
#define DASD_FMT_INT_INVAL 4 /* invalidate tracks */
|
|
#define DASD_FMT_INT_COMPAT 8 /* use OS/390 compatible disk layout */
|
|
|
|
|
|
/*
|
|
* struct attrib_data_t
|
|
* represents the operation (cache) bits for the device.
|
|
* Used in DE to influence caching of the DASD.
|
|
*/
|
|
typedef struct attrib_data_t {
|
|
unsigned char operation:3; /* cache operation mode */
|
|
unsigned char reserved:5; /* cache operation mode */
|
|
__u16 nr_cyl; /* no of cyliners for read ahaed */
|
|
__u8 reserved2[29]; /* for future use */
|
|
} __attribute__ ((packed)) attrib_data_t;
|
|
|
|
/* definition of operation (cache) bits within attributes of DE */
|
|
#define DASD_NORMAL_CACHE 0x0
|
|
#define DASD_BYPASS_CACHE 0x1
|
|
#define DASD_INHIBIT_LOAD 0x2
|
|
#define DASD_SEQ_ACCESS 0x3
|
|
#define DASD_SEQ_PRESTAGE 0x4
|
|
#define DASD_REC_ACCESS 0x5
|
|
|
|
|
|
/********************************************************************************
|
|
* SECTION: Definition of IOCTLs
|
|
*
|
|
* Here ist how the ioctl-nr should be used:
|
|
* 0 - 31 DASD driver itself
|
|
* 32 - 229 still open
|
|
* 230 - 239 DASD extended error reporting
|
|
* 240 - 255 reserved for EMC
|
|
*******************************************************************************/
|
|
|
|
/* Disable the volume (for Linux) */
|
|
#define BIODASDDISABLE _IO(DASD_IOCTL_LETTER,0)
|
|
/* Enable the volume (for Linux) */
|
|
#define BIODASDENABLE _IO(DASD_IOCTL_LETTER,1)
|
|
/* Issue a reserve/release command, rsp. */
|
|
#define BIODASDRSRV _IO(DASD_IOCTL_LETTER,2) /* reserve */
|
|
#define BIODASDRLSE _IO(DASD_IOCTL_LETTER,3) /* release */
|
|
#define BIODASDSLCK _IO(DASD_IOCTL_LETTER,4) /* steal lock */
|
|
/* reset profiling information of a device */
|
|
#define BIODASDPRRST _IO(DASD_IOCTL_LETTER,5)
|
|
/* Quiesce IO on device */
|
|
#define BIODASDQUIESCE _IO(DASD_IOCTL_LETTER,6)
|
|
/* Resume IO on device */
|
|
#define BIODASDRESUME _IO(DASD_IOCTL_LETTER,7)
|
|
|
|
|
|
/* retrieve API version number */
|
|
#define DASDAPIVER _IOR(DASD_IOCTL_LETTER,0,int)
|
|
/* Get information on a dasd device */
|
|
#define BIODASDINFO _IOR(DASD_IOCTL_LETTER,1,dasd_information_t)
|
|
/* retrieve profiling information of a device */
|
|
#define BIODASDPRRD _IOR(DASD_IOCTL_LETTER,2,dasd_profile_info_t)
|
|
/* Get information on a dasd device (enhanced) */
|
|
#define BIODASDINFO2 _IOR(DASD_IOCTL_LETTER,3,dasd_information2_t)
|
|
/* Performance Statistics Read */
|
|
#define BIODASDPSRD _IOR(DASD_IOCTL_LETTER,4,dasd_rssd_perf_stats_t)
|
|
/* Get Attributes (cache operations) */
|
|
#define BIODASDGATTR _IOR(DASD_IOCTL_LETTER,5,attrib_data_t)
|
|
/* retrieve extended error-reporting value */
|
|
#define BIODASDEERGET _IOR(DASD_IOCTL_LETTER,6,int)
|
|
|
|
|
|
/* #define BIODASDFORMAT _IOW(IOCTL_LETTER,0,format_data_t) , deprecated */
|
|
#define BIODASDFMT _IOW(DASD_IOCTL_LETTER,1,format_data_t)
|
|
/* Set Attributes (cache operations) */
|
|
#define BIODASDSATTR _IOW(DASD_IOCTL_LETTER,2,attrib_data_t)
|
|
/* retrieve extended error-reporting value */
|
|
#define BIODASDEERSET _IOW(DASD_IOCTL_LETTER,3,int)
|
|
|
|
|
|
/* remove all records from the eer buffer */
|
|
#define DASD_EER_PURGE _IO(DASD_IOCTL_LETTER,230)
|
|
/* set the number of pages that are used for the internal eer buffer */
|
|
#define DASD_EER_SETBUFSIZE _IOW(DASD_IOCTL_LETTER,230,int)
|
|
|
|
|
|
#endif /* DASD_H */
|
|
|
|
/*
|
|
* Overrides for Emacs so that we follow Linus's tabbing style.
|
|
* Emacs will notice this stuff at the end of the file and automatically
|
|
* adjust the settings for this buffer only. This must remain at the end
|
|
* of the file.
|
|
* ---------------------------------------------------------------------------
|
|
* Local variables:
|
|
* c-indent-level: 4
|
|
* c-brace-imaginary-offset: 0
|
|
* c-brace-offset: -4
|
|
* c-argdecl-indent: 4
|
|
* c-label-offset: -4
|
|
* c-continued-statement-offset: 4
|
|
* c-continued-brace-offset: 0
|
|
* indent-tabs-mode: nil
|
|
* tab-width: 8
|
|
* End:
|
|
*/
|