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alistair23-linux/drivers/s390/block/dasd_eckd.h
Jan Höppner 9e12e54c7a 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>
2019-07-11 20:39:54 +02:00

700 lines
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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com>
* Horst Hummel <Horst.Hummel@de.ibm.com>
* Bugreports.to..: <Linux390@de.ibm.com>
* Copyright IBM Corp. 1999, 2000
*
*/
#ifndef DASD_ECKD_H
#define DASD_ECKD_H
/*****************************************************************************
* SECTION: CCW Definitions
****************************************************************************/
#define DASD_ECKD_CCW_WRITE 0x05
#define DASD_ECKD_CCW_READ 0x06
#define DASD_ECKD_CCW_WRITE_HOME_ADDRESS 0x09
#define DASD_ECKD_CCW_READ_HOME_ADDRESS 0x0a
#define DASD_ECKD_CCW_WRITE_KD 0x0d
#define DASD_ECKD_CCW_READ_KD 0x0e
#define DASD_ECKD_CCW_ERASE 0x11
#define DASD_ECKD_CCW_READ_COUNT 0x12
#define DASD_ECKD_CCW_SLCK 0x14
#define DASD_ECKD_CCW_WRITE_RECORD_ZERO 0x15
#define DASD_ECKD_CCW_READ_RECORD_ZERO 0x16
#define DASD_ECKD_CCW_WRITE_CKD 0x1d
#define DASD_ECKD_CCW_READ_CKD 0x1e
#define DASD_ECKD_CCW_PSF 0x27
#define DASD_ECKD_CCW_SNID 0x34
#define DASD_ECKD_CCW_RSSD 0x3e
#define DASD_ECKD_CCW_LOCATE_RECORD 0x47
#define DASD_ECKD_CCW_LOCATE_RECORD_EXT 0x4b
#define DASD_ECKD_CCW_SNSS 0x54
#define DASD_ECKD_CCW_DEFINE_EXTENT 0x63
#define DASD_ECKD_CCW_WRITE_MT 0x85
#define DASD_ECKD_CCW_READ_MT 0x86
#define DASD_ECKD_CCW_WRITE_KD_MT 0x8d
#define DASD_ECKD_CCW_READ_KD_MT 0x8e
#define DASD_ECKD_CCW_READ_COUNT_MT 0x92
#define DASD_ECKD_CCW_RELEASE 0x94
#define DASD_ECKD_CCW_WRITE_FULL_TRACK 0x95
#define DASD_ECKD_CCW_READ_CKD_MT 0x9e
#define DASD_ECKD_CCW_WRITE_CKD_MT 0x9d
#define DASD_ECKD_CCW_WRITE_TRACK_DATA 0xA5
#define DASD_ECKD_CCW_READ_TRACK_DATA 0xA6
#define DASD_ECKD_CCW_RESERVE 0xB4
#define DASD_ECKD_CCW_READ_TRACK 0xDE
#define DASD_ECKD_CCW_PFX 0xE7
#define DASD_ECKD_CCW_PFX_READ 0xEA
#define DASD_ECKD_CCW_RSCK 0xF9
#define DASD_ECKD_CCW_RCD 0xFA
#define DASD_ECKD_CCW_DSO 0xF7
/* Define Subssystem Function / Orders */
#define DSO_ORDER_RAS 0x81
/*
* Perform Subsystem Function / Orders
*/
#define PSF_ORDER_PRSSD 0x18
#define PSF_ORDER_CUIR_RESPONSE 0x1A
#define PSF_ORDER_SSC 0x1D
/*
* Perform Subsystem Function / Sub-Orders
*/
#define PSF_SUBORDER_QHA 0x1C /* Query Host Access */
#define PSF_SUBORDER_VSQ 0x52 /* Volume Storage Query */
#define PSF_SUBORDER_LCQ 0x53 /* Logical Configuration Query */
/*
* CUIR response condition codes
*/
#define PSF_CUIR_INVALID 0x00
#define PSF_CUIR_COMPLETED 0x01
#define PSF_CUIR_NOT_SUPPORTED 0x02
#define PSF_CUIR_ERROR_IN_REQ 0x03
#define PSF_CUIR_DENIED 0x04
#define PSF_CUIR_LAST_PATH 0x05
#define PSF_CUIR_DEVICE_ONLINE 0x06
#define PSF_CUIR_VARY_FAILURE 0x07
#define PSF_CUIR_SOFTWARE_FAILURE 0x08
#define PSF_CUIR_NOT_RECOGNIZED 0x09
/*
* CUIR codes
*/
#define CUIR_QUIESCE 0x01
#define CUIR_RESUME 0x02
/*
* Out-of-space (OOS) Codes
*/
#define REPO_WARN 0x01
#define REPO_EXHAUST 0x02
#define POOL_WARN 0x03
#define POOL_EXHAUST 0x04
#define REPO_RELIEVE 0x05
#define POOL_RELIEVE 0x06
/*
* attention message definitions
*/
#define ATTENTION_LENGTH_CUIR 0x0e
#define ATTENTION_FORMAT_CUIR 0x01
#define ATTENTION_LENGTH_OOS 0x10
#define ATTENTION_FORMAT_OOS 0x06
#define DASD_ECKD_PG_GROUPED 0x10
/*
* Size that is reportet for large volumes in the old 16-bit no_cyl field
*/
#define LV_COMPAT_CYL 0xFFFE
#define FCX_MAX_DATA_FACTOR 65536
#define DASD_ECKD_RCD_DATA_SIZE 256
#define DASD_ECKD_PATH_THRHLD 256
#define DASD_ECKD_PATH_INTERVAL 300
/*
* Maximum number of blocks to be chained
*/
#define DASD_ECKD_MAX_BLOCKS 190
#define DASD_ECKD_MAX_BLOCKS_RAW 256
/*****************************************************************************
* SECTION: Type Definitions
****************************************************************************/
struct eckd_count {
__u16 cyl;
__u16 head;
__u8 record;
__u8 kl;
__u16 dl;
} __attribute__ ((packed));
struct ch_t {
__u16 cyl;
__u16 head;
} __attribute__ ((packed));
struct chr_t {
__u16 cyl;
__u16 head;
__u8 record;
} __attribute__ ((packed));
struct DE_eckd_data {
struct {
unsigned char perm:2; /* Permissions on this extent */
unsigned char reserved:1;
unsigned char seek:2; /* Seek control */
unsigned char auth:2; /* Access authorization */
unsigned char pci:1; /* PCI Fetch mode */
} __attribute__ ((packed)) mask;
struct {
unsigned char mode:2; /* Architecture mode */
unsigned char ckd:1; /* CKD Conversion */
unsigned char operation:3; /* Operation mode */
unsigned char cfw:1; /* Cache fast write */
unsigned char dfw:1; /* DASD fast write */
} __attribute__ ((packed)) attributes;
__u16 blk_size; /* Blocksize */
__u16 fast_write_id;
__u8 ga_additional; /* Global Attributes Additional */
__u8 ga_extended; /* Global Attributes Extended */
struct ch_t beg_ext;
struct ch_t end_ext;
unsigned long ep_sys_time; /* Ext Parameter - System Time Stamp */
__u8 ep_format; /* Extended Parameter format byte */
__u8 ep_prio; /* Extended Parameter priority I/O byte */
__u8 ep_reserved1; /* Extended Parameter Reserved */
__u8 ep_rec_per_track; /* Number of records on a track */
__u8 ep_reserved[4]; /* Extended Parameter Reserved */
} __attribute__ ((packed));
struct LO_eckd_data {
struct {
unsigned char orientation:2;
unsigned char operation:6;
} __attribute__ ((packed)) operation;
struct {
unsigned char last_bytes_used:1;
unsigned char reserved:6;
unsigned char read_count_suffix:1;
} __attribute__ ((packed)) auxiliary;
__u8 unused;
__u8 count;
struct ch_t seek_addr;
struct chr_t search_arg;
__u8 sector;
__u16 length;
} __attribute__ ((packed));
struct LRE_eckd_data {
struct {
unsigned char orientation:2;
unsigned char operation:6;
} __attribute__ ((packed)) operation;
struct {
unsigned char length_valid:1;
unsigned char length_scope:1;
unsigned char imbedded_ccw_valid:1;
unsigned char check_bytes:2;
unsigned char imbedded_count_valid:1;
unsigned char reserved:1;
unsigned char read_count_suffix:1;
} __attribute__ ((packed)) auxiliary;
__u8 imbedded_ccw;
__u8 count;
struct ch_t seek_addr;
struct chr_t search_arg;
__u8 sector;
__u16 length;
__u8 imbedded_count;
__u8 extended_operation;
__u16 extended_parameter_length;
__u8 extended_parameter[0];
} __attribute__ ((packed));
/* Prefix data for format 0x00 and 0x01 */
struct PFX_eckd_data {
unsigned char format;
struct {
unsigned char define_extent:1;
unsigned char time_stamp:1;
unsigned char verify_base:1;
unsigned char hyper_pav:1;
unsigned char reserved:4;
} __attribute__ ((packed)) validity;
__u8 base_address;
__u8 aux;
__u8 base_lss;
__u8 reserved[7];
struct DE_eckd_data define_extent;
struct LRE_eckd_data locate_record;
} __attribute__ ((packed));
struct dasd_eckd_characteristics {
__u16 cu_type;
struct {
unsigned char support:2;
unsigned char async:1;
unsigned char reserved:1;
unsigned char cache_info:1;
unsigned char model:3;
} __attribute__ ((packed)) cu_model;
__u16 dev_type;
__u8 dev_model;
struct {
unsigned char mult_burst:1;
unsigned char RT_in_LR:1;
unsigned char reserved1:1;
unsigned char RD_IN_LR:1;
unsigned char reserved2:4;
unsigned char reserved3:8;
unsigned char defect_wr:1;
unsigned char XRC_supported:1;
unsigned char reserved4:1;
unsigned char striping:1;
unsigned char reserved5:4;
unsigned char cfw:1;
unsigned char reserved6:2;
unsigned char cache:1;
unsigned char dual_copy:1;
unsigned char dfw:1;
unsigned char reset_alleg:1;
unsigned char sense_down:1;
} __attribute__ ((packed)) facilities;
__u8 dev_class;
__u8 unit_type;
__u16 no_cyl;
__u16 trk_per_cyl;
__u8 sec_per_trk;
__u8 byte_per_track[3];
__u16 home_bytes;
__u8 formula;
union {
struct {
__u8 f1;
__u16 f2;
__u16 f3;
} __attribute__ ((packed)) f_0x01;
struct {
__u8 f1;
__u8 f2;
__u8 f3;
__u8 f4;
__u8 f5;
} __attribute__ ((packed)) f_0x02;
} __attribute__ ((packed)) factors;
__u16 first_alt_trk;
__u16 no_alt_trk;
__u16 first_dia_trk;
__u16 no_dia_trk;
__u16 first_sup_trk;
__u16 no_sup_trk;
__u8 MDR_ID;
__u8 OBR_ID;
__u8 director;
__u8 rd_trk_set;
__u16 max_rec_zero;
__u8 reserved1;
__u8 RWANY_in_LR;
__u8 factor6;
__u8 factor7;
__u8 factor8;
__u8 reserved2[3];
__u8 reserved3[6];
__u32 long_no_cyl;
} __attribute__ ((packed));
/* elements of the configuration data */
struct dasd_ned {
struct {
__u8 identifier:2;
__u8 token_id:1;
__u8 sno_valid:1;
__u8 subst_sno:1;
__u8 recNED:1;
__u8 emuNED:1;
__u8 reserved:1;
} __attribute__ ((packed)) flags;
__u8 descriptor;
__u8 dev_class;
__u8 reserved;
__u8 dev_type[6];
__u8 dev_model[3];
__u8 HDA_manufacturer[3];
__u8 HDA_location[2];
__u8 HDA_seqno[12];
__u8 ID;
__u8 unit_addr;
} __attribute__ ((packed));
struct dasd_sneq {
struct {
__u8 identifier:2;
__u8 reserved:6;
} __attribute__ ((packed)) flags;
__u8 res1;
__u16 format;
__u8 res2[4]; /* byte 4- 7 */
__u8 sua_flags; /* byte 8 */
__u8 base_unit_addr; /* byte 9 */
__u8 res3[22]; /* byte 10-31 */
} __attribute__ ((packed));
struct vd_sneq {
struct {
__u8 identifier:2;
__u8 reserved:6;
} __attribute__ ((packed)) flags;
__u8 res1;
__u16 format;
__u8 res2[4]; /* byte 4- 7 */
__u8 uit[16]; /* byte 8-23 */
__u8 res3[8]; /* byte 24-31 */
} __attribute__ ((packed));
struct dasd_gneq {
struct {
__u8 identifier:2;
__u8 reserved:6;
} __attribute__ ((packed)) flags;
__u8 record_selector;
__u8 reserved[4];
struct {
__u8 value:2;
__u8 number:6;
} __attribute__ ((packed)) timeout;
__u8 reserved3;
__u16 subsystemID;
__u8 reserved2[22];
} __attribute__ ((packed));
struct dasd_rssd_features {
char feature[256];
} __attribute__((packed));
struct dasd_rssd_messages {
__u16 length;
__u8 format;
__u8 code;
__u32 message_id;
__u8 flags;
char messages[4087];
} __packed;
/*
* Read Subsystem Data - Volume Storage Query
*/
struct dasd_rssd_vsq {
struct {
__u8 tse:1;
__u8 space_not_available:1;
__u8 ese:1;
__u8 unused:5;
} __packed vol_info;
__u8 unused1;
__u16 extent_pool_id;
__u8 warn_cap_limit;
__u8 warn_cap_guaranteed;
__u16 unused2;
__u32 limit_capacity;
__u32 guaranteed_capacity;
__u32 space_allocated;
__u32 space_configured;
__u32 logical_capacity;
} __packed;
/*
* Extent Pool Summary
*/
struct dasd_ext_pool_sum {
__u16 pool_id;
__u8 repo_warn_thrshld;
__u8 warn_thrshld;
struct {
__u8 type:1; /* 0 - CKD / 1 - FB */
__u8 track_space_efficient:1;
__u8 extent_space_efficient:1;
__u8 standard_volume:1;
__u8 extent_size_valid:1;
__u8 capacity_at_warnlevel:1;
__u8 pool_oos:1;
__u8 unused0:1;
__u8 unused1;
} __packed flags;
struct {
__u8 reserved0:1;
__u8 size_1G:1;
__u8 reserved1:5;
__u8 size_16M:1;
} __packed extent_size;
__u8 unused;
} __packed;
/*
* Read Subsystem Data-Response - Logical Configuration Query - Header
*/
struct dasd_rssd_lcq {
__u16 data_length; /* Length of data returned */
__u16 pool_count; /* Count of extent pools returned - Max: 448 */
struct {
__u8 pool_info_valid:1; /* Detailed Information valid */
__u8 pool_id_volume:1;
__u8 pool_id_cec:1;
__u8 unused0:5;
__u8 unused1;
} __packed header_flags;
char sfi_type[6]; /* Storage Facility Image Type (EBCDIC) */
char sfi_model[3]; /* Storage Facility Image Model (EBCDIC) */
__u8 sfi_seq_num[10]; /* Storage Facility Image Sequence Number */
__u8 reserved[7];
struct dasd_ext_pool_sum ext_pool_sum[448];
} __packed;
struct dasd_oos_message {
__u16 length;
__u8 format;
__u8 code;
__u8 percentage_empty;
__u8 reserved;
__u16 ext_pool_id;
__u16 token;
__u8 unused[6];
} __packed;
struct dasd_cuir_message {
__u16 length;
__u8 format;
__u8 code;
__u32 message_id;
__u8 flags;
__u8 neq_map[3];
__u8 ned_map;
__u8 record_selector;
} __packed;
struct dasd_psf_cuir_response {
__u8 order;
__u8 flags;
__u8 cc;
__u8 chpid;
__u16 device_nr;
__u16 reserved;
__u32 message_id;
__u64 system_id;
__u8 cssid;
__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 reserved1;
unsigned char reserved2;
unsigned char lss;
unsigned char volume;
unsigned char suborder;
unsigned char varies[5];
} __attribute__ ((packed));
/*
* Perform Subsystem Function - Set Subsystem Characteristics
*/
struct dasd_psf_ssc_data {
unsigned char order;
unsigned char flags;
unsigned char cu_type[4];
unsigned char suborder;
unsigned char reserved[59];
} __attribute__((packed));
/* Maximum number of extents for a single Release Allocated Space command */
#define DASD_ECKD_RAS_EXTS_MAX 110U
struct dasd_dso_ras_ext_range {
struct ch_t beg_ext;
struct ch_t end_ext;
} __packed;
/*
* Define Subsytem Operation - Release Allocated Space
*/
struct dasd_dso_ras_data {
__u8 order;
struct {
__u8 message:1; /* Must be zero */
__u8 reserved1:2;
__u8 vol_type:1; /* 0 - CKD/FBA, 1 - FB */
__u8 reserved2:4;
} __packed flags;
/* Operation Flags to specify scope */
struct {
__u8 reserved1:2;
/* Release Space by Extent */
__u8 by_extent:1; /* 0 - entire volume, 1 - specified extents */
__u8 guarantee_init:1;
__u8 force_release:1; /* Internal - will be ignored */
__u16 reserved2:11;
} __packed op_flags;
__u8 lss;
__u8 dev_addr;
__u32 reserved1;
__u8 reserved2[10];
__u16 nr_exts; /* Defines number of ext_scope - max 110 */
__u16 reserved3;
} __packed;
/*
* some structures and definitions for alias handling
*/
struct dasd_unit_address_configuration {
struct {
char ua_type;
char base_ua;
} unit[256];
} __attribute__((packed));
#define MAX_DEVICES_PER_LCU 256
/* flags on the LCU */
#define NEED_UAC_UPDATE 0x01
#define UPDATE_PENDING 0x02
enum pavtype {NO_PAV, BASE_PAV, HYPER_PAV};
struct alias_root {
struct list_head serverlist;
spinlock_t lock;
};
struct alias_server {
struct list_head server;
struct dasd_uid uid;
struct list_head lculist;
};
struct summary_unit_check_work_data {
char reason;
struct dasd_device *device;
struct work_struct worker;
};
struct read_uac_work_data {
struct dasd_device *device;
struct delayed_work dwork;
};
struct alias_lcu {
struct list_head lcu;
struct dasd_uid uid;
enum pavtype pav;
char flags;
spinlock_t lock;
struct list_head grouplist;
struct list_head active_devices;
struct list_head inactive_devices;
struct dasd_unit_address_configuration *uac;
struct summary_unit_check_work_data suc_data;
struct read_uac_work_data ruac_data;
struct dasd_ccw_req *rsu_cqr;
struct completion lcu_setup;
};
struct alias_pav_group {
struct list_head group;
struct dasd_uid uid;
struct alias_lcu *lcu;
struct list_head baselist;
struct list_head aliaslist;
struct dasd_device *next;
};
struct dasd_conf_data {
struct dasd_ned neds[5];
u8 reserved[64];
struct dasd_gneq gneq;
} __packed;
struct dasd_eckd_private {
struct dasd_eckd_characteristics rdc_data;
u8 *conf_data;
int conf_len;
/* pointers to specific parts in the conf_data */
struct dasd_ned *ned;
struct dasd_sneq *sneq;
struct vd_sneq *vdsneq;
struct dasd_gneq *gneq;
struct eckd_count count_area[5];
int init_cqr_status;
int uses_cdl;
struct attrib_data_t attrib; /* e.g. cache operations */
struct dasd_rssd_features features;
struct dasd_rssd_vsq vsq;
struct dasd_ext_pool_sum eps;
u32 real_cyl;
/* alias managemnet */
struct dasd_uid uid;
struct alias_pav_group *pavgroup;
struct alias_lcu *lcu;
int count;
u32 fcx_max_data;
char suc_reason;
};
int dasd_alias_make_device_known_to_lcu(struct dasd_device *);
void dasd_alias_disconnect_device_from_lcu(struct dasd_device *);
int dasd_alias_add_device(struct dasd_device *);
int dasd_alias_remove_device(struct dasd_device *);
struct dasd_device *dasd_alias_get_start_dev(struct dasd_device *);
void dasd_alias_handle_summary_unit_check(struct work_struct *);
void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *);
int dasd_alias_update_add_device(struct dasd_device *);
#endif /* DASD_ECKD_H */
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