X-Git-Url: http://git.ipfire.org/?a=blobdiff_plain;f=md_p.h;h=358a28ce3fcff3be791712848c41402d835e79cd;hb=56928762baf7d2aa451406be0526fecd35cdfc78;hp=d6bb37a810b3f41f4e1d48acc6dae837e1be76ed;hpb=64c4757e27fe7d688685e9a86ff87a3331a88979;p=thirdparty%2Fmdadm.git diff --git a/md_p.h b/md_p.h index d6bb37a8..358a28ce 100644 --- a/md_p.h +++ b/md_p.h @@ -1,15 +1,15 @@ /* md_p.h : physical layout of Linux RAID devices Copyright (C) 1996-98 Ingo Molnar, Gadi Oxman - + This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. - + You should have received a copy of the GNU General Public License (for example /usr/src/linux/COPYING); if not, write to the Free - Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #ifndef _MD_P_H @@ -75,9 +75,29 @@ * Device "operational" state bits */ #define MD_DISK_FAULTY 0 /* disk is faulty / operational */ -#define MD_DISK_ACTIVE 1 /* disk is running or spare disk */ +#define MD_DISK_ACTIVE 1 /* disk is running but may not be in sync */ #define MD_DISK_SYNC 2 /* disk is in sync with the raid set */ #define MD_DISK_REMOVED 3 /* disk is in sync with the raid set */ +#define MD_DISK_CLUSTER_ADD 4 /* Initiate a disk add across the cluster + * For clustered enviroments only. + */ +#define MD_DISK_CANDIDATE 5 /* disk is added as spare (local) until confirmed + * For clustered enviroments only. + */ + +#define MD_DISK_WRITEMOSTLY 9 /* disk is "write-mostly" is RAID1 config. + * read requests will only be sent here in + * dire need + */ +#define MD_DISK_FAILFAST 10 /* Fewer retries, more failures */ + +#define MD_DISK_REPLACEMENT 17 +#define MD_DISK_JOURNAL 18 /* disk is used as the write journal in RAID-5/6 */ + +#define MD_DISK_ROLE_SPARE 0xffff +#define MD_DISK_ROLE_FAULTY 0xfffe +#define MD_DISK_ROLE_JOURNAL 0xfffd +#define MD_DISK_ROLE_MAX 0xff00 /* max value of regular disk role */ typedef struct mdp_device_descriptor_s { __u32 number; /* 0 Device number in the entire set */ @@ -95,12 +115,18 @@ typedef struct mdp_device_descriptor_s { */ #define MD_SB_CLEAN 0 #define MD_SB_ERRORS 1 +#define MD_SB_BBM_ERRORS 2 +#define MD_SB_BLOCK_CONTAINER_RESHAPE 3 /* block container wide reshapes */ +#define MD_SB_BLOCK_VOLUME 4 /* block activation of array, other arrays + * in container can be activated */ +#define MD_SB_CLUSTERED 5 /* MD is clustered */ +#define MD_SB_BITMAP_PRESENT 8 /* bitmap may be present nearby */ typedef struct mdp_superblock_s { /* * Constant generic information */ - __u32 md_magic; /* 0 MD identifier */ + __u32 md_magic; /* 0 MD identifier */ __u32 major_version; /* 1 major version to which the set conforms */ __u32 minor_version; /* 2 minor version ... */ __u32 patch_version; /* 3 patchlevel version ... */ @@ -128,14 +154,25 @@ typedef struct mdp_superblock_s { __u32 failed_disks; /* 4 Number of failed disks */ __u32 spare_disks; /* 5 Number of spare disks */ __u32 sb_csum; /* 6 checksum of the whole superblock */ -#ifdef __BIG_ENDIAN +#if __BYTE_ORDER == __BIG_ENDIAN __u32 events_hi; /* 7 high-order of superblock update count */ __u32 events_lo; /* 8 low-order of superblock update count */ + __u32 cp_events_hi; /* 9 high-order of checkpoint update count */ + __u32 cp_events_lo; /* 10 low-order of checkpoint update count */ #else __u32 events_lo; /* 7 low-order of superblock update count */ __u32 events_hi; /* 8 high-order of superblock update count */ + __u32 cp_events_lo; /* 9 low-order of checkpoint update count */ + __u32 cp_events_hi; /* 10 high-order of checkpoint update count */ #endif - __u32 gstate_sreserved[MD_SB_GENERIC_STATE_WORDS - 9]; + __u32 recovery_cp; /* 11 recovery checkpoint sector count */ + /* There are only valid for minor_version > 90 */ + __u64 reshape_position; /* 12,13 next address in array-space for reshape */ + __u32 new_level; /* 14 new level we are reshaping to */ + __u32 delta_disks; /* 15 change in number of raid_disks */ + __u32 new_layout; /* 16 new layout */ + __u32 new_chunk; /* 17 new chunk size (bytes) */ + __u32 gstate_sreserved[MD_SB_GENERIC_STATE_WORDS - 18]; /* * Personality information @@ -163,10 +200,96 @@ typedef struct mdp_superblock_s { } mdp_super_t; +#ifdef __TINYC__ +typedef unsigned long long __u64; +#endif + static inline __u64 md_event(mdp_super_t *sb) { __u64 ev = sb->events_hi; return (ev<<32)| sb->events_lo; } -#endif +struct r5l_payload_header { + __u16 type; + __u16 flags; +} __attribute__ ((__packed__)); + +enum r5l_payload_type { + R5LOG_PAYLOAD_DATA = 0, + R5LOG_PAYLOAD_PARITY = 1, + R5LOG_PAYLOAD_FLUSH = 2, +}; + +struct r5l_payload_data_parity { + struct r5l_payload_header header; + __u32 size; /* sector. data/parity size. each 4k has a checksum */ + __u64 location; /* sector. For data, it's raid sector. For + parity, it's stripe sector */ + __u32 checksum[]; +} __attribute__ ((__packed__)); + +enum r5l_payload_data_parity_flag { + R5LOG_PAYLOAD_FLAG_DISCARD = 1, /* payload is discard */ + /* + * RESHAPED/RESHAPING is only set when there is reshape activity. Note, + * both data/parity of a stripe should have the same flag set + * + * RESHAPED: reshape is running, and this stripe finished reshape + * RESHAPING: reshape is running, and this stripe isn't reshaped + * */ + R5LOG_PAYLOAD_FLAG_RESHAPED = 2, + R5LOG_PAYLOAD_FLAG_RESHAPING = 3, +}; + +struct r5l_payload_flush { + struct r5l_payload_header header; + __u32 size; /* flush_stripes size, bytes */ + __u64 flush_stripes[]; +} __attribute__ ((__packed__)); + +enum r5l_payload_flush_flag { + R5LOG_PAYLOAD_FLAG_FLUSH_STRIPE = 1, /* data represents whole stripe */ +}; + +struct r5l_meta_block { + __u32 magic; + __u32 checksum; + __u8 version; + __u8 __zero_pading_1; + __u16 __zero_pading_2; + __u32 meta_size; /* whole size of the block */ + + __u64 seq; + __u64 position; /* sector, start from rdev->data_offset, current position */ + struct r5l_payload_header payloads[]; +} __attribute__ ((__packed__)); +#define R5LOG_VERSION 0x1 +#define R5LOG_MAGIC 0x6433c509 + +struct ppl_header_entry { + __u64 data_sector; /* raid sector of the new data */ + __u32 pp_size; /* length of partial parity */ + __u32 data_size; /* length of data */ + __u32 parity_disk; /* member disk containing parity */ + __u32 checksum; /* checksum of this entry's partial parity */ +} __attribute__ ((__packed__)); + +#define PPL_HEADER_SIZE 4096 +#define PPL_HDR_RESERVED 512 +#define PPL_HDR_ENTRY_SPACE \ + (PPL_HEADER_SIZE - PPL_HDR_RESERVED - 4 * sizeof(__u32) - sizeof(__u64)) +#define PPL_HDR_MAX_ENTRIES \ + (PPL_HDR_ENTRY_SPACE / sizeof(struct ppl_header_entry)) + +struct ppl_header { + __u8 reserved[PPL_HDR_RESERVED];/* reserved space, fill with 0xff */ + __u32 signature; /* signature (family number of volume) */ + __u32 padding; /* zero pad */ + __u64 generation; /* generation number of the header */ + __u32 entries_count; /* number of entries in entry array */ + __u32 checksum; /* checksum of the header */ + struct ppl_header_entry entries[PPL_HDR_MAX_ENTRIES]; +} __attribute__ ((__packed__)); + +#endif