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src/sys/dev/softraidvar.h

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/* $OpenBSD: softraidvar.h,v 1.176 2022/12/19 15:27:06 kn Exp $ */
/*
* Copyright (c) 2006 Marco Peereboom <marco@peereboom.us>
* Copyright (c) 2008 Chris Kuethe <ckuethe@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef SOFTRAIDVAR_H
#define SOFTRAIDVAR_H
#define SR_META_VERSION 6 /* bump when sr_metadata changes */
#define SR_META_SIZE 64 /* save space at chunk beginning */
#define SR_META_OFFSET 16 /* skip 8192 bytes at chunk beginning */
#define SR_BOOT_OFFSET (SR_META_OFFSET + SR_META_SIZE)
#define SR_BOOT_LOADER_SIZE 320 /* Size of boot loader storage. */
#define SR_BOOT_LOADER_OFFSET SR_BOOT_OFFSET
#define SR_BOOT_BLOCKS_SIZE 128 /* Size of boot block storage. */
#define SR_BOOT_BLOCKS_OFFSET (SR_BOOT_LOADER_OFFSET + SR_BOOT_LOADER_SIZE)
#define SR_BOOT_SIZE (SR_BOOT_LOADER_SIZE + SR_BOOT_BLOCKS_SIZE)
#define SR_CRYPTO_MAXKEYBYTES 32 /* max bytes in a key (AES-XTS-256) */
#define SR_CRYPTO_MAXKEYS 32 /* max keys per volume */
#define SR_CRYPTO_KEYBITS 512 /* AES-XTS with 2 * 256 bit keys */
#define SR_CRYPTO_KEYBYTES (SR_CRYPTO_KEYBITS >> 3)
#define SR_CRYPTO_KDFHINTBYTES 256 /* size of opaque KDF hint */
#define SR_CRYPTO_CHECKBYTES 64 /* size of generic key chksum struct */
#define SR_CRYPTO_KEY_BLKSHIFT 30 /* 0.5TB per key */
#define SR_CRYPTO_KEY_BLKSIZE (1ULL << SR_CRYPTO_KEY_BLKSHIFT)
#define SR_CRYPTO_MAXSIZE (SR_CRYPTO_KEY_BLKSIZE * SR_CRYPTO_MAXKEYS)
/*
* sr_crypto_genkdf is a generic hint for the KDF performed in userland and
* is not interpreted by the kernel.
*/
struct sr_crypto_genkdf {
u_int32_t len;
u_int32_t type;
#define SR_CRYPTOKDFT_INVALID 0
#define SR_CRYPTOKDFT_PKCS5_PBKDF2 1
#define SR_CRYPTOKDFT_KEYDISK 2
#define SR_CRYPTOKDFT_BCRYPT_PBKDF 3
};
/*
* sr_crypto_pbkdf is a hint for a PBKDF performed in userland and is not
* interpreted by the kernel.
*/
struct sr_crypto_pbkdf {
struct sr_crypto_genkdf generic;
u_int32_t rounds;
u_int8_t salt[128];
};
/*
* sr_crypto_kdfinfo is used to copy masking keys and KDF hints from/to
* userland. The embedded hint structures are not interpreted by the kernel.
*/
struct sr_crypto_kdfinfo {
u_int32_t len;
u_int32_t flags;
#define SR_CRYPTOKDF_INVALID (0)
#define SR_CRYPTOKDF_KEY (1<<0)
#define SR_CRYPTOKDF_HINT (1<<1)
u_int8_t maskkey[SR_CRYPTO_MAXKEYBYTES];
union {
struct sr_crypto_genkdf generic;
struct sr_crypto_pbkdf pbkdf;
} _kdfhint;
#define genkdf _kdfhint.generic
#define pbkdf _kdfhint.pbkdf
};
#define SR_IOCTL_GET_KDFHINT 0x01 /* Get KDF hint. */
#define SR_IOCTL_CHANGE_PASSPHRASE 0x02 /* Change passphrase. */
struct sr_crypto_kdfpair {
struct sr_crypto_kdfinfo *kdfinfo1;
u_int32_t kdfsize1;
struct sr_crypto_kdfinfo *kdfinfo2;
u_int32_t kdfsize2;
};
#if defined(_KERNEL) || defined(_STANDALONE)
#include <crypto/md5.h>
#define SR_META_V3_SIZE 64
#define SR_META_V3_OFFSET 16
#define SR_META_V3_DATA_OFFSET (SR_META_V3_OFFSET + SR_META_V3_SIZE)
#define SR_META_F_NATIVE 0 /* Native metadata format. */
#define SR_META_F_INVALID -1
#define SR_HEADER_SIZE (SR_META_SIZE + SR_BOOT_SIZE)
#define SR_DATA_OFFSET (SR_META_OFFSET + SR_HEADER_SIZE)
#define SR_HOTSPARE_LEVEL 0xffffffff
#define SR_HOTSPARE_VOLID 0xffffffff
#define SR_KEYDISK_LEVEL 0xfffffffe
#define SR_KEYDISK_VOLID 0xfffffffe
#define SR_UUID_MAX 16
struct sr_uuid {
u_int8_t sui_id[SR_UUID_MAX];
} __packed;
struct sr_disk {
dev_t sdk_devno;
SLIST_ENTRY(sr_disk) sdk_link;
};
SLIST_HEAD(sr_disk_head, sr_disk);
struct sr_metadata {
struct sr_meta_invariant {
/* do not change order of ssd_magic, ssd_version */
u_int64_t ssd_magic; /* magic id */
#define SR_MAGIC 0x4d4152436372616dLLU
u_int32_t ssd_version; /* meta data version */
u_int32_t ssd_vol_flags; /* volume specific flags. */
struct sr_uuid ssd_uuid; /* unique identifier */
/* chunks */
u_int32_t ssd_chunk_no; /* number of chunks */
u_int32_t ssd_chunk_id; /* chunk identifier */
/* optional */
u_int32_t ssd_opt_no; /* nr of optional md elements */
u_int32_t ssd_secsize;
/* volume metadata */
u_int32_t ssd_volid; /* volume id */
u_int32_t ssd_level; /* raid level */
int64_t ssd_size; /* virt disk size in blocks */
char ssd_vendor[8]; /* scsi vendor */
char ssd_product[16];/* scsi product */
char ssd_revision[4];/* scsi revision */
/* optional volume members */
u_int32_t ssd_strip_size; /* strip size */
} _sdd_invariant;
#define ssdi _sdd_invariant
/* MD5 of invariant metadata */
u_int8_t ssd_checksum[MD5_DIGEST_LENGTH];
char ssd_devname[32];/* /dev/XXXXX */
u_int32_t ssd_meta_flags;
#define SR_META_DIRTY 0x1
u_int32_t ssd_data_blkno;
u_int64_t ssd_ondisk; /* on disk version counter */
int64_t ssd_rebuild; /* last block of rebuild */
} __packed;
struct sr_meta_chunk {
struct sr_meta_chunk_invariant {
u_int32_t scm_volid; /* vd we belong to */
u_int32_t scm_chunk_id; /* chunk id */
char scm_devname[32];/* /dev/XXXXX */
int64_t scm_size; /* size of partition in blocks*/
int64_t scm_coerced_size; /* coerced sz of part in blk*/
struct sr_uuid scm_uuid; /* unique identifier */
} _scm_invariant;
#define scmi _scm_invariant
/* MD5 of invariant chunk metadata */
u_int8_t scm_checksum[MD5_DIGEST_LENGTH];
u_int32_t scm_status; /* use bio bioc_disk status */
} __packed;
/*
* Check that HMAC-SHA1_k(decrypted scm_key) == sch_mac, where
* k = SHA1(masking key)
*/
struct sr_crypto_chk_hmac_sha1 {
u_int8_t sch_mac[20];
} __packed;
#define SR_OPT_INVALID 0x00
#define SR_OPT_CRYPTO 0x01
#define SR_OPT_BOOT 0x02
#define SR_OPT_KEYDISK 0x03
struct sr_meta_opt_hdr {
u_int32_t som_type; /* optional metadata type. */
u_int32_t som_length; /* optional metadata length. */
u_int8_t som_checksum[MD5_DIGEST_LENGTH];
} __packed;
struct sr_meta_crypto {
struct sr_meta_opt_hdr scm_hdr;
u_int32_t scm_alg; /* vol crypto algorithm */
#define SR_CRYPTOA_AES_XTS_128 1
#define SR_CRYPTOA_AES_XTS_256 2
u_int32_t scm_flags; /* key & kdfhint valid */
#define SR_CRYPTOF_INVALID (0)
#define SR_CRYPTOF_KEY (1<<0)
#define SR_CRYPTOF_KDFHINT (1<<1)
u_int32_t scm_mask_alg; /* disk key masking crypt alg */
#define SR_CRYPTOM_AES_ECB_256 1
u_int32_t scm_pad1;
u_int8_t scm_reserved[64];
/* symmetric keys used for disk encryption */
u_int8_t scm_key[SR_CRYPTO_MAXKEYS][SR_CRYPTO_KEYBYTES];
/* hint to kdf algorithm (opaque to kernel) */
u_int8_t scm_kdfhint[SR_CRYPTO_KDFHINTBYTES];
u_int32_t scm_check_alg; /* key chksum algorithm */
#define SR_CRYPTOC_HMAC_SHA1 1
u_int32_t scm_pad2;
union {
struct sr_crypto_chk_hmac_sha1 chk_hmac_sha1;
u_int8_t chk_reserved2[64];
} _scm_chk;
#define chk_hmac_sha1 _scm_chk.chk_hmac_sha1
} __packed;
#define SR_MAX_BOOT_DISKS 16
struct sr_meta_boot {
struct sr_meta_opt_hdr sbm_hdr;
u_int32_t sbm_bootblk_size;
u_int32_t sbm_bootldr_size;
u_char sbm_root_duid[8];
u_char sbm_boot_duid[SR_MAX_BOOT_DISKS][8];
} __packed;
struct sr_meta_keydisk {
struct sr_meta_opt_hdr skm_hdr;
u_int8_t skm_maskkey[SR_CRYPTO_MAXKEYBYTES];
} __packed;
#define SR_OLD_META_OPT_SIZE 2480
#define SR_OLD_META_OPT_OFFSET 8
#define SR_OLD_META_OPT_MD5 (SR_OLD_META_OPT_SIZE - MD5_DIGEST_LENGTH)
struct sr_meta_opt_item {
struct sr_meta_opt_hdr *omi_som;
SLIST_ENTRY(sr_meta_opt_item) omi_link;
};
SLIST_HEAD(sr_meta_opt_head, sr_meta_opt_item);
struct sr_boot_chunk {
struct sr_metadata *sbc_metadata;
dev_t sbc_mm; /* Device major/minor. */
u_int32_t sbc_chunk_id; /* Chunk ID. */
u_int32_t sbc_state; /* Chunk state. */
u_int32_t sbc_disk; /* Disk number. */
int sbc_part; /* Partition number. */
u_int64_t sbc_ondisk; /* Ondisk version. */
void *sbc_diskinfo; /* MD disk information. */
SLIST_ENTRY(sr_boot_chunk) sbc_link;
};
SLIST_HEAD(sr_boot_chunk_head, sr_boot_chunk);
struct sr_boot_volume {
struct sr_uuid sbv_uuid; /* Volume UUID. */
u_int32_t sbv_level; /* RAID Level. */
u_int32_t sbv_volid; /* Volume ID. */
u_int32_t sbv_chunk_no; /* Number of chunks. */
u_int32_t sbv_flags; /* Volume specific flags. */
u_int32_t sbv_state; /* Volume state. */
int64_t sbv_size; /* Virtual disk size. */
u_int32_t sbv_secsize; /* Sector size */
u_int32_t sbv_data_blkno; /* Data offset. */
u_int64_t sbv_ondisk; /* Ondisk version. */
u_int32_t sbv_chunks_found; /* Number of chunks found. */
u_int32_t sbv_unit; /* Disk unit number. */
char sbv_part; /* Partition opened. */
void *sbv_diskinfo; /* MD disk information. */
u_int8_t *sbv_keys; /* Disk keys for volume. */
u_int8_t *sbv_maskkey; /* Mask key for disk keys. */
struct sr_boot_chunk_head sbv_chunks; /* List of chunks. */
struct sr_meta_opt_head sbv_meta_opt; /* List of optional metadata. */
SLIST_ENTRY(sr_boot_volume) sbv_link;
};
SLIST_HEAD(sr_boot_volume_head, sr_boot_volume);
#endif /* _KERNEL | _STANDALONE */
#ifdef _KERNEL
#include <dev/biovar.h>
#include <sys/buf.h>
#include <sys/queue.h>
#include <sys/rwlock.h>
#include <sys/task.h>
#include <scsi/scsi_all.h>
#include <scsi/scsi_disk.h>
#include <scsi/scsiconf.h>
#define DEVNAME(_s) ((_s)->sc_dev.dv_xname)
/* #define SR_DEBUG */
#ifdef SR_DEBUG
extern u_int32_t sr_debug;
#define DNPRINTF(n,x...) do { if (sr_debug & n) printf(x); } while(0)
#define SR_D_CMD 0x0001
#define SR_D_INTR 0x0002
#define SR_D_MISC 0x0004
#define SR_D_IOCTL 0x0008
#define SR_D_CCB 0x0010
#define SR_D_WU 0x0020
#define SR_D_META 0x0040
#define SR_D_DIS 0x0080
#define SR_D_STATE 0x0100
#define SR_D_REBUILD 0x0200
#else
#define DNPRINTF(n,x...)
#endif
#define SR_MAX_LD 256
#define SR_MAX_CMDS 16
#define SR_MAX_STATES 7
#define SR_VM_IGNORE_DIRTY 1
#define SR_REBUILD_IO_SIZE 128 /* blocks */
extern struct sr_uuid sr_bootuuid;
extern u_int8_t sr_bootkey[SR_CRYPTO_MAXKEYBYTES];
/* forward define to prevent dependency goo */
struct sr_softc;
struct sr_ccb {
struct buf ccb_buf; /* MUST BE FIRST!! */
struct sr_workunit *ccb_wu;
struct sr_discipline *ccb_dis;
int ccb_target;
int ccb_state;
#define SR_CCB_FREE 0
#define SR_CCB_INPROGRESS 1
#define SR_CCB_OK 2
#define SR_CCB_FAILED 3
int ccb_flags;
#define SR_CCBF_FREEBUF (1<<0) /* free ccb_buf.b_data */
void *ccb_opaque; /* discipline usable pointer */
TAILQ_ENTRY(sr_ccb) ccb_link;
};
TAILQ_HEAD(sr_ccb_list, sr_ccb);
struct sr_workunit {
struct scsi_xfer *swu_xs;
struct sr_discipline *swu_dis;
int swu_state;
#define SR_WU_FREE 0
#define SR_WU_INPROGRESS 1
#define SR_WU_OK 2
#define SR_WU_FAILED 3
#define SR_WU_PARTIALLYFAILED 4
#define SR_WU_DEFERRED 5
#define SR_WU_PENDING 6
#define SR_WU_RESTART 7
#define SR_WU_REQUEUE 8
#define SR_WU_CONSTRUCT 9
int swu_flags; /* additional hints */
#define SR_WUF_REBUILD (1<<0) /* rebuild io */
#define SR_WUF_REBUILDIOCOMP (1<<1) /* rebuild io complete */
#define SR_WUF_FAIL (1<<2) /* RAID6: failure */
#define SR_WUF_FAILIOCOMP (1<<3)
#define SR_WUF_WAKEUP (1<<4) /* Wakeup on I/O completion. */
#define SR_WUF_DISCIPLINE (1<<5) /* Discipline specific I/O. */
#define SR_WUF_FAKE (1<<6) /* Faked workunit. */
/* workunit io range */
daddr_t swu_blk_start;
daddr_t swu_blk_end;
/* number of ios that makes up the whole work unit */
u_int32_t swu_io_count;
/* in flight totals */
u_int32_t swu_ios_complete;
u_int32_t swu_ios_failed;
u_int32_t swu_ios_succeeded;
/* colliding wu */
struct sr_workunit *swu_collider;
/* all ios that make up this workunit */
struct sr_ccb_list swu_ccb;
/* task memory */
struct task swu_task;
int swu_cb_active; /* in callback */
TAILQ_ENTRY(sr_workunit) swu_link; /* Link in processing queue. */
TAILQ_ENTRY(sr_workunit) swu_next; /* Next work unit in chain. */
};
TAILQ_HEAD(sr_wu_list, sr_workunit);
/* RAID 0 */
#define SR_RAID0_NOWU 16
struct sr_raid0 {
int32_t sr0_strip_bits;
};
/* RAID 1 */
#define SR_RAID1_NOWU 16
struct sr_raid1 {
u_int32_t sr1_counter;
};
/* RAID 5 */
#define SR_RAID5_NOWU 16
struct sr_raid5 {
int32_t sr5_strip_bits;
};
/* RAID 6 */
#define SR_RAID6_NOWU 16
struct sr_raid6 {
int32_t sr6_strip_bits;
};
/* CRYPTO */
TAILQ_HEAD(sr_crypto_wu_head, sr_crypto_wu);
#define SR_CRYPTO_NOWU 16
/*
* The per-I/O data that we need to preallocate. We cannot afford to allow I/O
* to start failing when memory pressure kicks in. We can store this in the WU
* because we assert that only one ccb per WU will ever be active during crypto.
*/
struct sr_crypto_wu {
struct sr_workunit cr_wu; /* Must be first. */
struct uio cr_uio;
struct iovec cr_iov;
struct cryptop *cr_crp;
void *cr_dmabuf;
};
struct sr_crypto {
struct sr_meta_crypto *scr_meta;
struct sr_chunk *key_disk;
int scr_alg;
int scr_klen;
/* XXX only keep scr_sid over time */
u_int8_t scr_key[SR_CRYPTO_MAXKEYS][SR_CRYPTO_KEYBYTES];
u_int8_t scr_maskkey[SR_CRYPTO_MAXKEYBYTES];
u_int64_t scr_sid[SR_CRYPTO_MAXKEYS];
};
#define SR_CONCAT_NOWU 16
struct sr_concat {
};
/* RAID 1C */
#define SR_RAID1C_NOWU 16
struct sr_raid1c {
struct sr_crypto sr1c_crypto;
struct sr_raid1 sr1c_raid1;
};
struct sr_chunk {
struct sr_meta_chunk src_meta; /* chunk meta data */
/* runtime data */
dev_t src_dev_mm; /* major/minor */
struct vnode *src_vn; /* vnode */
/* helper members before metadata makes it onto the chunk */
int src_meta_ondisk;/* set when meta is on disk */
char src_devname[32];
u_char src_duid[8]; /* Chunk disklabel UID. */
int64_t src_size; /* in blocks */
u_int32_t src_secsize;
SLIST_ENTRY(sr_chunk) src_link;
};
SLIST_HEAD(sr_chunk_head, sr_chunk);
struct sr_volume {
/* runtime data */
struct sr_chunk_head sv_chunk_list; /* linked list of all chunks */
struct sr_chunk **sv_chunks; /* array to same chunks */
int64_t sv_chunk_minsz; /* Size of smallest chunk. */
int64_t sv_chunk_maxsz; /* Size of largest chunk. */
/* sensors */
struct ksensor sv_sensor;
int sv_sensor_attached;
};
struct sr_discipline {
struct sr_softc *sd_sc; /* link back to sr softc */
size_t sd_wu_size; /* alloc and free size */
u_int8_t sd_type; /* type of discipline */
#define SR_MD_RAID0 0
#define SR_MD_RAID1 1
#define SR_MD_RAID5 2
#define SR_MD_CACHE 3
#define SR_MD_CRYPTO 4
/* AOE was 5 and 6. */
/* SR_MD_RAID4 was 7. */
#define SR_MD_RAID6 8
#define SR_MD_CONCAT 9
#define SR_MD_RAID1C 10
char sd_name[10]; /* human readable discipline name */
u_int16_t sd_target; /* scsibus target discipline uses */
u_int32_t sd_capabilities;
#define SR_CAP_SYSTEM_DISK 0x00000001 /* Attaches as a system disk. */
#define SR_CAP_AUTO_ASSEMBLE 0x00000002 /* Can auto assemble. */
#define SR_CAP_REBUILD 0x00000004 /* Supports rebuild. */
#define SR_CAP_NON_COERCED 0x00000008 /* Uses non-coerced size. */
#define SR_CAP_REDUNDANT 0x00000010 /* Redundant copies of data. */
union {
struct sr_raid0 mdd_raid0;
struct sr_raid1 mdd_raid1;
struct sr_raid5 mdd_raid5;
struct sr_raid6 mdd_raid6;
struct sr_concat mdd_concat;
#ifdef CRYPTO
struct sr_crypto mdd_crypto;
struct sr_raid1c mdd_raid1c;
#endif /* CRYPTO */
} sd_dis_specific;/* dis specific members */
#define mds sd_dis_specific
struct taskq *sd_taskq;
/* discipline metadata */
struct sr_metadata *sd_meta; /* in memory copy of metadata */
void *sd_meta_foreign; /* non native metadata */
u_int32_t sd_meta_flags;
int sd_meta_type; /* metadata functions */
struct sr_meta_opt_head sd_meta_opt; /* optional metadata. */
int sd_sync;
int sd_must_flush;
int sd_deleted;
/* discipline volume */
struct sr_volume sd_vol; /* volume associated */
int sd_vol_status; /* runtime vol status */
/* discipline resources */
struct sr_ccb *sd_ccb;
struct sr_ccb_list sd_ccb_freeq;
u_int32_t sd_max_ccb_per_wu;
struct sr_wu_list sd_wu; /* all workunits */
u_int32_t sd_max_wu;
int sd_reb_active; /* rebuild in progress */
int sd_reb_abort; /* abort rebuild */
int sd_ready; /* fully operational */
struct sr_wu_list sd_wu_freeq; /* free wu queue */
struct sr_wu_list sd_wu_pendq; /* pending wu queue */
struct sr_wu_list sd_wu_defq; /* deferred wu queue */
struct mutex sd_wu_mtx;
struct scsi_iopool sd_iopool;
/* discipline stats */
int sd_wu_pending;
u_int64_t sd_wu_collisions;
/* discipline functions */
int (*sd_create)(struct sr_discipline *,
struct bioc_createraid *, int, int64_t);
int (*sd_assemble)(struct sr_discipline *,
struct bioc_createraid *, int, void *);
int (*sd_alloc_resources)(struct sr_discipline *);
void (*sd_free_resources)(struct sr_discipline *);
int (*sd_ioctl_handler)(struct sr_discipline *,
struct bioc_discipline *);
int (*sd_start_discipline)(struct sr_discipline *);
void (*sd_set_chunk_state)(struct sr_discipline *,
int, int);
void (*sd_set_vol_state)(struct sr_discipline *);
int (*sd_openings)(struct sr_discipline *);
int (*sd_meta_opt_handler)(struct sr_discipline *,
struct sr_meta_opt_hdr *);
void (*sd_rebuild)(struct sr_discipline *);
/* SCSI emulation */
struct scsi_sense_data sd_scsi_sense;
int (*sd_scsi_rw)(struct sr_workunit *);
void (*sd_scsi_intr)(struct buf *);
int (*sd_scsi_wu_done)(struct sr_workunit *);
void (*sd_scsi_done)(struct sr_workunit *);
int (*sd_scsi_sync)(struct sr_workunit *);
int (*sd_scsi_tur)(struct sr_workunit *);
int (*sd_scsi_start_stop)(struct sr_workunit *);
int (*sd_scsi_inquiry)(struct sr_workunit *);
int (*sd_scsi_read_cap)(struct sr_workunit *);
int (*sd_scsi_req_sense)(struct sr_workunit *);
/* background operation */
struct proc *sd_background_proc;
/* Tasks. */
struct task sd_meta_save_task;
struct task sd_hotspare_rebuild_task;
TAILQ_ENTRY(sr_discipline) sd_link;
};
TAILQ_HEAD(sr_discipline_list, sr_discipline);
struct sr_softc {
struct device sc_dev;
struct rwlock sc_lock;
struct bio_status sc_status; /* Status and messages. */
struct sr_chunk_head sc_hotspare_list; /* List of hotspares. */
struct rwlock sc_hs_lock; /* Lock for hotspares list. */
int sc_hotspare_no; /* Number of hotspares. */
struct ksensordev sc_sensordev;
struct sensor_task *sc_sensor_task;
struct scsibus_softc *sc_scsibus;
/* The target lookup has to be cheap since it happens for each I/O. */
struct sr_discipline *sc_targets[SR_MAX_LD];
struct sr_discipline_list sc_dis_list;
};
/* hotplug */
void sr_hotplug_register(struct sr_discipline *, void *);
void sr_hotplug_unregister(struct sr_discipline *, void *);
/* Hotspare and rebuild. */
void sr_hotspare_rebuild_callback(void *);
/* work units & ccbs */
int sr_ccb_alloc(struct sr_discipline *);
void sr_ccb_free(struct sr_discipline *);
struct sr_ccb *sr_ccb_get(struct sr_discipline *);
void sr_ccb_put(struct sr_ccb *);
struct sr_ccb *sr_ccb_rw(struct sr_discipline *, int, daddr_t,
long, u_int8_t *, int, int);
void sr_ccb_done(struct sr_ccb *);
int sr_wu_alloc(struct sr_discipline *);
void sr_wu_free(struct sr_discipline *);
void *sr_wu_get(void *);
void sr_wu_put(void *, void *);
void sr_wu_init(struct sr_discipline *,
struct sr_workunit *);
void sr_wu_enqueue_ccb(struct sr_workunit *,
struct sr_ccb *);
void sr_wu_release_ccbs(struct sr_workunit *);
void sr_wu_done(struct sr_workunit *);
/* misc functions */
void sr_info(struct sr_softc *, const char *, ...);
void sr_warn(struct sr_softc *, const char *, ...);
void sr_error(struct sr_softc *, const char *, ...);
int32_t sr_validate_stripsize(u_int32_t);
int sr_meta_read(struct sr_discipline *);
int sr_meta_native_read(struct sr_discipline *, dev_t,
struct sr_metadata *, void *);
int sr_meta_validate(struct sr_discipline *, dev_t,
struct sr_metadata *, void *);
void sr_meta_save_callback(void *);
int sr_meta_save(struct sr_discipline *, u_int32_t);
void sr_meta_getdevname(struct sr_softc *, dev_t, char *,
int);
void sr_meta_opt_load(struct sr_softc *,
struct sr_metadata *, struct sr_meta_opt_head *);
void *sr_block_get(struct sr_discipline *, long);
void sr_block_put(struct sr_discipline *, void *, int);
void sr_checksum(struct sr_softc *, void *, void *,
u_int32_t);
int sr_validate_io(struct sr_workunit *, daddr_t *,
char *);
void sr_schedule_wu(struct sr_workunit *);
void sr_scsi_done(struct sr_discipline *,
struct scsi_xfer *);
struct sr_workunit *sr_scsi_wu_get(struct sr_discipline *, int);
void sr_scsi_wu_put(struct sr_discipline *,
struct sr_workunit *);
int sr_chunk_in_use(struct sr_softc *, dev_t);
int sr_rebuild_percent(struct sr_discipline *);
/* discipline functions */
int sr_raid_inquiry(struct sr_workunit *);
int sr_raid_read_cap(struct sr_workunit *);
int sr_raid_tur(struct sr_workunit *);
int sr_raid_request_sense( struct sr_workunit *);
int sr_raid_start_stop(struct sr_workunit *);
int sr_raid_sync(struct sr_workunit *);
void sr_raid_intr(struct buf *);
void sr_raid_startwu(struct sr_workunit *);
void sr_raid_recreate_wu(struct sr_workunit *);
/* Discipline specific initialisation. */
void sr_raid0_discipline_init(struct sr_discipline *);
void sr_raid1_discipline_init(struct sr_discipline *);
void sr_raid5_discipline_init(struct sr_discipline *);
void sr_raid6_discipline_init(struct sr_discipline *);
void sr_crypto_discipline_init(struct sr_discipline *);
void sr_concat_discipline_init(struct sr_discipline *);
void sr_raid1c_discipline_init(struct sr_discipline *);
/* Crypto discipline hooks. */
int sr_crypto_get_kdf(struct bioc_createraid *,
struct sr_discipline *, struct sr_crypto *);
int sr_crypto_create_keys(struct sr_discipline *,
struct sr_crypto *);
struct sr_chunk * sr_crypto_create_key_disk(struct sr_discipline *,
struct sr_crypto *, dev_t);
struct sr_chunk * sr_crypto_read_key_disk(struct sr_discipline *,
struct sr_crypto *, dev_t);
/* Hibernate I/O function */
int sr_hibernate_io(dev_t dev, daddr_t blkno, vaddr_t addr,
size_t size, int op, void *page);
#ifdef SR_DEBUG
void sr_dump_block(void *, int);
void sr_dump_mem(u_int8_t *, int);
#endif
#endif /* _KERNEL */
#endif /* SOFTRAIDVAR_H */
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