/* $OpenBSD: softraidvar.h,v 1.3 2007/03/19 22:33:15 dlg Exp $ */ /* * Copyright (c) 2006 Marco Peereboom * * 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. */ #include #include #include #include #include #include #include #define DEVNAME(_s) ((_s)->sc_dev.dv_xname) /* #define SR_DEBUG */ #ifdef SR_DEBUG extern u_int32_t sr_debug; #define DPRINTF(x...) do { if (sr_debug) printf(x); } while(0) #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 #else #define DPRINTF(x...) #define DNPRINTF(n,x...) #endif #define SR_MAXFER MAXPHYS #define SR_MAX_LD 1 #define SR_MAX_CMDS 16 /* forward define to prevent dependency goo */ struct sr_softc; #define SR_UUID_MAX 4 struct sr_uuid { u_int32_t sui_id[SR_UUID_MAX]; } __packed; struct sr_ccb { struct buf ccb_buf; /* MUST BE FIRST!! */ struct sr_workunit *ccb_wu; struct sr_discipline *ccb_dis; int ccb_state; #define SR_CCB_FREE 0 #define SR_CCB_INPROGRESS 1 #define SR_CCB_OK 2 #define SR_CCB_FAILED 3 TAILQ_ENTRY(sr_ccb) ccb_link; } __packed; 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 /* in flight totals */ u_int32_t swu_ios_complete; u_int32_t swu_ios_failed; u_int32_t swu_ios_succeeded; /* number of ios that makes up the whole work unit */ u_int32_t swu_io_count; /* index into all ios */ /* XXX make this a list ? */ struct sr_ccb **swu_ios; TAILQ_ENTRY(sr_workunit) swu_link; }; TAILQ_HEAD(sr_wu_list, sr_workunit); #define SR_META_PD 1 /* only 1 PD per metadata block */ #define SR_META_VD 1 /* only 1 VD per metadata block */ #define SR_META_DATA 1 /* only 1 metadata block per disk */ #define SR_META_FUDGE 32 /* save some space at the end of chunk */ #define SR_META_VERSION 1 /* bump when sr_metadata changes */ struct sr_metadata { /* do not change order of ssd_magic, ssd_version and ssd_big_endian */ u_int64_t ssd_magic; /* magic id */ #define SR_MAGIC 0x4d4152436372616dllu u_int8_t ssd_version; /* meta data version */ u_int8_t ssd_big_endian; /* set if big endian */ u_int8_t ssd_pad[2]; /* meta-data */ u_int32_t ssd_checksum; /* xor of the structure */ u_int32_t ssd_size; /* sizeof(sr_metadata) */ u_int32_t ssd_ondisk; /* on disk version counter */ struct sr_uuid ssd_uuid; /* unique identifier */ /* virtual disk data */ u_int32_t ssd_vd_ver; /* vd structure version */ u_int32_t ssd_vd_size; /* vd structure size */ u_int32_t ssd_vd_chk; /* vd structure xor */ /* chunk data */ u_int32_t ssd_chunk_ver; /* chunk structure version */ u_int32_t ssd_chunk_no; /* number of chunks */ u_int32_t ssd_chunk_size; /* chunk structure size */ u_int32_t ssd_chunk_chk; /* chunk structure xor */ } __packed; #define SR_CHUNK_VERSION 1 /* bump when sr_chunk_meta changes */ struct sr_chunk_meta { int scm_volid; /* vd we belong to */ int scm_chunk_id; /* chunk id */ char scm_devname[32];/* /dev/XXXXX */ int scm_status; /* use bio bioc_disk status */ u_quad_t scm_size; /* size of partition */ u_quad_t scm_coerced_size; /* coerced size of part */ struct sr_uuid scm_uuid; /* unique identifier */ } __packed; struct sr_chunk { struct sr_chunk_meta src_meta; /* chunk meta data */ /* runtime data */ struct vnode *src_dev_vn; /* vnode */ dev_t src_dev_mm; /* major/minor */ SLIST_ENTRY(sr_chunk) src_link; }; SLIST_HEAD(sr_chunk_head, sr_chunk); #define SR_VOL_VERSION 1 /* bump when sr_vol_meta changes */ struct sr_vol_meta { int svm_volid; /* volume id */ int svm_status; /* use bioc_vol status */ int svm_flags; /* flags */ #define SR_VDF_DIRTY 0x01 u_quad_t svm_size; /* virtual disk size */ int svm_level; /* raid level */ char svm_vendor[8]; /* scsi vendor */ char svm_product[16];/* scsi product */ char svm_revision[4];/* scsi revision */ char svm_pad[4]; char svm_devname[32];/* /dev/XXXXX */ int svm_no_chunk; /* number of chunks */ struct sr_uuid svm_uuid; /* volume unique identifier */ } __packed; struct sr_volume { struct sr_vol_meta sv_meta; /* meta data */ /* runtime data */ struct sr_chunk_head sv_chunk_list; /* linked list of all chunks */ struct sr_chunk **sv_chunks; /* array to same chunks */ }; /* RAID 1 */ #define SR_RAID1_NOWU 16 struct sr_raid1 { u_int32_t sr1_counter; }; struct sr_discipline { struct sr_softc *sd_sc; /* link back to sr softc */ 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 char sd_name[10]; /* human readable dis name */ u_int8_t sd_scsibus; /* scsibus discipline uses */ struct scsi_link sd_link; /* link to midlayer */ union { struct sr_raid1 mdd_raid1; } sd_dis_specific;/* dis specific members */ #define mds sd_dis_specific /* discipline volume */ struct sr_volume sd_vol; /* volume associated */ /* discipline resources */ struct sr_ccb *sd_ccb; struct sr_ccb_list sd_ccb_freeq; u_int32_t sd_max_ccb_per_wu; struct sr_workunit *sd_wu; struct sr_wu_list sd_wu_freeq; u_int32_t sd_max_wu; /* discipline functions */ int (*sd_alloc_resources)(struct sr_discipline *); int (*sd_assemble_volume)(void *); int (*sd_bringup_volume)(void *); int (*sd_shutdown_volume)(void *); int (*sd_free_resources)(struct sr_discipline *); int (*sd_quiesce_io)(struct sr_discipline *); /* SCSI emulation */ struct scsi_sense_data sd_scsi_sense; int (*sd_scsi_rw)(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 *); }; struct sr_softc { struct device sc_dev; int (*sc_ioctl)(struct device *, u_long, caddr_t); struct rwlock sc_lock; /* * during scsibus attach this is the discipline that is in use * this variable is protected by sc_lock and splhigh */ struct sr_discipline *sc_attach_dis; /* * XXX expensive, alternative would be nice but has to be cheap * since the scsibus lookup happens on each IO */ #define SR_MAXSCSIBUS 256 struct sr_discipline *sc_dis[SR_MAXSCSIBUS]; /* scsibus is u_int8_t */ };