375 lines
11 KiB
C
375 lines
11 KiB
C
#ifndef __RADOS_H
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#define __RADOS_H
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/*
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* Data types for the Ceph distributed object storage layer RADOS
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* (Reliable Autonomic Distributed Object Store).
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*/
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#include "msgr.h"
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/*
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* osdmap encoding versions
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*/
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#define CEPH_OSDMAP_INC_VERSION 3
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#define CEPH_OSDMAP_VERSION 3
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/*
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* fs id
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*/
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struct ceph_fsid {
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unsigned char fsid[16];
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};
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static inline int ceph_fsid_compare(const struct ceph_fsid *a,
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const struct ceph_fsid *b)
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{
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return memcmp(a, b, sizeof(*a));
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}
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/*
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* ino, object, etc.
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*/
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typedef __le64 ceph_snapid_t;
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#define CEPH_SNAPDIR ((__u64)(-1)) /* reserved for hidden .snap dir */
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#define CEPH_NOSNAP ((__u64)(-2)) /* "head", "live" revision */
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#define CEPH_MAXSNAP ((__u64)(-3)) /* largest valid snapid */
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struct ceph_timespec {
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__le32 tv_sec;
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__le32 tv_nsec;
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} __attribute__ ((packed));
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/*
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* object layout - how objects are mapped into PGs
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*/
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#define CEPH_OBJECT_LAYOUT_HASH 1
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#define CEPH_OBJECT_LAYOUT_LINEAR 2
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#define CEPH_OBJECT_LAYOUT_HASHINO 3
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/*
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* pg layout -- how PGs are mapped onto (sets of) OSDs
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*/
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#define CEPH_PG_LAYOUT_CRUSH 0
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#define CEPH_PG_LAYOUT_HASH 1
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#define CEPH_PG_LAYOUT_LINEAR 2
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#define CEPH_PG_LAYOUT_HYBRID 3
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/*
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* placement group.
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* we encode this into one __le64.
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*/
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struct ceph_pg {
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__le16 preferred; /* preferred primary osd */
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__le16 ps; /* placement seed */
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__le32 pool; /* object pool */
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} __attribute__ ((packed));
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/*
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* pg_pool is a set of pgs storing a pool of objects
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*
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* pg_num -- base number of pseudorandomly placed pgs
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*
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* pgp_num -- effective number when calculating pg placement. this
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* is used for pg_num increases. new pgs result in data being "split"
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* into new pgs. for this to proceed smoothly, new pgs are intiially
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* colocated with their parents; that is, pgp_num doesn't increase
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* until the new pgs have successfully split. only _then_ are the new
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* pgs placed independently.
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*
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* lpg_num -- localized pg count (per device). replicas are randomly
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* selected.
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*
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* lpgp_num -- as above.
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*/
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#define CEPH_PG_TYPE_REP 1
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#define CEPH_PG_TYPE_RAID4 2
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#define CEPH_PG_POOL_VERSION 2
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struct ceph_pg_pool {
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__u8 type; /* CEPH_PG_TYPE_* */
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__u8 size; /* number of osds in each pg */
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__u8 crush_ruleset; /* crush placement rule */
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__u8 object_hash; /* hash mapping object name to ps */
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__le32 pg_num, pgp_num; /* number of pg's */
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__le32 lpg_num, lpgp_num; /* number of localized pg's */
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__le32 last_change; /* most recent epoch changed */
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__le64 snap_seq; /* seq for per-pool snapshot */
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__le32 snap_epoch; /* epoch of last snap */
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__le32 num_snaps;
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__le32 num_removed_snap_intervals;
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__le64 uid;
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} __attribute__ ((packed));
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/*
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* stable_mod func is used to control number of placement groups.
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* similar to straight-up modulo, but produces a stable mapping as b
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* increases over time. b is the number of bins, and bmask is the
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* containing power of 2 minus 1.
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*
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* b <= bmask and bmask=(2**n)-1
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* e.g., b=12 -> bmask=15, b=123 -> bmask=127
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*/
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static inline int ceph_stable_mod(int x, int b, int bmask)
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{
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if ((x & bmask) < b)
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return x & bmask;
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else
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return x & (bmask >> 1);
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}
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/*
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* object layout - how a given object should be stored.
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*/
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struct ceph_object_layout {
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struct ceph_pg ol_pgid; /* raw pg, with _full_ ps precision. */
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__le32 ol_stripe_unit; /* for per-object parity, if any */
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} __attribute__ ((packed));
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/*
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* compound epoch+version, used by storage layer to serialize mutations
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*/
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struct ceph_eversion {
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__le32 epoch;
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__le64 version;
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} __attribute__ ((packed));
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/*
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* osd map bits
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*/
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/* status bits */
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#define CEPH_OSD_EXISTS 1
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#define CEPH_OSD_UP 2
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/* osd weights. fixed point value: 0x10000 == 1.0 ("in"), 0 == "out" */
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#define CEPH_OSD_IN 0x10000
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#define CEPH_OSD_OUT 0
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/*
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* osd map flag bits
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*/
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#define CEPH_OSDMAP_NEARFULL (1<<0) /* sync writes (near ENOSPC) */
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#define CEPH_OSDMAP_FULL (1<<1) /* no data writes (ENOSPC) */
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#define CEPH_OSDMAP_PAUSERD (1<<2) /* pause all reads */
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#define CEPH_OSDMAP_PAUSEWR (1<<3) /* pause all writes */
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#define CEPH_OSDMAP_PAUSEREC (1<<4) /* pause recovery */
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/*
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* osd ops
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*/
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#define CEPH_OSD_OP_MODE 0xf000
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#define CEPH_OSD_OP_MODE_RD 0x1000
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#define CEPH_OSD_OP_MODE_WR 0x2000
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#define CEPH_OSD_OP_MODE_RMW 0x3000
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#define CEPH_OSD_OP_MODE_SUB 0x4000
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#define CEPH_OSD_OP_TYPE 0x0f00
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#define CEPH_OSD_OP_TYPE_LOCK 0x0100
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#define CEPH_OSD_OP_TYPE_DATA 0x0200
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#define CEPH_OSD_OP_TYPE_ATTR 0x0300
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#define CEPH_OSD_OP_TYPE_EXEC 0x0400
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#define CEPH_OSD_OP_TYPE_PG 0x0500
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enum {
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/** data **/
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/* read */
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CEPH_OSD_OP_READ = CEPH_OSD_OP_MODE_RD | CEPH_OSD_OP_TYPE_DATA | 1,
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CEPH_OSD_OP_STAT = CEPH_OSD_OP_MODE_RD | CEPH_OSD_OP_TYPE_DATA | 2,
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/* fancy read */
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CEPH_OSD_OP_MASKTRUNC = CEPH_OSD_OP_MODE_RD | CEPH_OSD_OP_TYPE_DATA | 4,
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/* write */
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CEPH_OSD_OP_WRITE = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_DATA | 1,
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CEPH_OSD_OP_WRITEFULL = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_DATA | 2,
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CEPH_OSD_OP_TRUNCATE = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_DATA | 3,
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CEPH_OSD_OP_ZERO = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_DATA | 4,
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CEPH_OSD_OP_DELETE = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_DATA | 5,
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/* fancy write */
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CEPH_OSD_OP_APPEND = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_DATA | 6,
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CEPH_OSD_OP_STARTSYNC = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_DATA | 7,
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CEPH_OSD_OP_SETTRUNC = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_DATA | 8,
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CEPH_OSD_OP_TRIMTRUNC = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_DATA | 9,
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CEPH_OSD_OP_TMAPUP = CEPH_OSD_OP_MODE_RMW | CEPH_OSD_OP_TYPE_DATA | 10,
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CEPH_OSD_OP_TMAPPUT = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_DATA | 11,
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CEPH_OSD_OP_TMAPGET = CEPH_OSD_OP_MODE_RD | CEPH_OSD_OP_TYPE_DATA | 12,
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CEPH_OSD_OP_CREATE = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_DATA | 13,
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/** attrs **/
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/* read */
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CEPH_OSD_OP_GETXATTR = CEPH_OSD_OP_MODE_RD | CEPH_OSD_OP_TYPE_ATTR | 1,
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CEPH_OSD_OP_GETXATTRS = CEPH_OSD_OP_MODE_RD | CEPH_OSD_OP_TYPE_ATTR | 2,
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/* write */
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CEPH_OSD_OP_SETXATTR = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_ATTR | 1,
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CEPH_OSD_OP_SETXATTRS = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_ATTR | 2,
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CEPH_OSD_OP_RESETXATTRS = CEPH_OSD_OP_MODE_WR|CEPH_OSD_OP_TYPE_ATTR | 3,
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CEPH_OSD_OP_RMXATTR = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_ATTR | 4,
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/** subop **/
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CEPH_OSD_OP_PULL = CEPH_OSD_OP_MODE_SUB | 1,
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CEPH_OSD_OP_PUSH = CEPH_OSD_OP_MODE_SUB | 2,
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CEPH_OSD_OP_BALANCEREADS = CEPH_OSD_OP_MODE_SUB | 3,
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CEPH_OSD_OP_UNBALANCEREADS = CEPH_OSD_OP_MODE_SUB | 4,
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CEPH_OSD_OP_SCRUB = CEPH_OSD_OP_MODE_SUB | 5,
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/** lock **/
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CEPH_OSD_OP_WRLOCK = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_LOCK | 1,
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CEPH_OSD_OP_WRUNLOCK = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_LOCK | 2,
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CEPH_OSD_OP_RDLOCK = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_LOCK | 3,
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CEPH_OSD_OP_RDUNLOCK = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_LOCK | 4,
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CEPH_OSD_OP_UPLOCK = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_LOCK | 5,
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CEPH_OSD_OP_DNLOCK = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_LOCK | 6,
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/** exec **/
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CEPH_OSD_OP_CALL = CEPH_OSD_OP_MODE_RD | CEPH_OSD_OP_TYPE_EXEC | 1,
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/** pg **/
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CEPH_OSD_OP_PGLS = CEPH_OSD_OP_MODE_RD | CEPH_OSD_OP_TYPE_PG | 1,
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};
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static inline int ceph_osd_op_type_lock(int op)
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{
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return (op & CEPH_OSD_OP_TYPE) == CEPH_OSD_OP_TYPE_LOCK;
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}
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static inline int ceph_osd_op_type_data(int op)
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{
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return (op & CEPH_OSD_OP_TYPE) == CEPH_OSD_OP_TYPE_DATA;
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}
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static inline int ceph_osd_op_type_attr(int op)
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{
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return (op & CEPH_OSD_OP_TYPE) == CEPH_OSD_OP_TYPE_ATTR;
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}
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static inline int ceph_osd_op_type_exec(int op)
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{
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return (op & CEPH_OSD_OP_TYPE) == CEPH_OSD_OP_TYPE_EXEC;
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}
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static inline int ceph_osd_op_type_pg(int op)
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{
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return (op & CEPH_OSD_OP_TYPE) == CEPH_OSD_OP_TYPE_PG;
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}
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static inline int ceph_osd_op_mode_subop(int op)
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{
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return (op & CEPH_OSD_OP_MODE) == CEPH_OSD_OP_MODE_SUB;
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}
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static inline int ceph_osd_op_mode_read(int op)
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{
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return (op & CEPH_OSD_OP_MODE) == CEPH_OSD_OP_MODE_RD;
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}
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static inline int ceph_osd_op_mode_modify(int op)
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{
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return (op & CEPH_OSD_OP_MODE) == CEPH_OSD_OP_MODE_WR;
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}
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#define CEPH_OSD_TMAP_HDR 'h'
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#define CEPH_OSD_TMAP_SET 's'
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#define CEPH_OSD_TMAP_RM 'r'
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extern const char *ceph_osd_op_name(int op);
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/*
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* osd op flags
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*
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* An op may be READ, WRITE, or READ|WRITE.
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*/
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enum {
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CEPH_OSD_FLAG_ACK = 1, /* want (or is) "ack" ack */
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CEPH_OSD_FLAG_ONNVRAM = 2, /* want (or is) "onnvram" ack */
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CEPH_OSD_FLAG_ONDISK = 4, /* want (or is) "ondisk" ack */
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CEPH_OSD_FLAG_RETRY = 8, /* resend attempt */
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CEPH_OSD_FLAG_READ = 16, /* op may read */
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CEPH_OSD_FLAG_WRITE = 32, /* op may write */
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CEPH_OSD_FLAG_ORDERSNAP = 64, /* EOLDSNAP if snapc is out of order */
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CEPH_OSD_FLAG_PEERSTAT = 128, /* msg includes osd_peer_stat */
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CEPH_OSD_FLAG_BALANCE_READS = 256,
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CEPH_OSD_FLAG_PARALLELEXEC = 512, /* execute op in parallel */
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CEPH_OSD_FLAG_PGOP = 1024, /* pg op, no object */
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CEPH_OSD_FLAG_EXEC = 2048, /* op may exec */
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};
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enum {
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CEPH_OSD_OP_FLAG_EXCL = 1, /* EXCL object create */
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};
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#define EOLDSNAPC ERESTART /* ORDERSNAP flag set; writer has old snapc*/
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#define EBLACKLISTED ESHUTDOWN /* blacklisted */
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/*
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* an individual object operation. each may be accompanied by some data
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* payload
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*/
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struct ceph_osd_op {
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__le16 op; /* CEPH_OSD_OP_* */
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__le32 flags; /* CEPH_OSD_FLAG_* */
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union {
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struct {
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__le64 offset, length;
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__le64 truncate_size;
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__le32 truncate_seq;
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} __attribute__ ((packed)) extent;
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struct {
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__le32 name_len;
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__le32 value_len;
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} __attribute__ ((packed)) xattr;
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struct {
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__u8 class_len;
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__u8 method_len;
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__u8 argc;
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__le32 indata_len;
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} __attribute__ ((packed)) cls;
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struct {
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__le64 cookie, count;
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} __attribute__ ((packed)) pgls;
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};
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__le32 payload_len;
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} __attribute__ ((packed));
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/*
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* osd request message header. each request may include multiple
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* ceph_osd_op object operations.
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*/
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struct ceph_osd_request_head {
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__le32 client_inc; /* client incarnation */
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struct ceph_object_layout layout; /* pgid */
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__le32 osdmap_epoch; /* client's osdmap epoch */
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__le32 flags;
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struct ceph_timespec mtime; /* for mutations only */
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struct ceph_eversion reassert_version; /* if we are replaying op */
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__le32 object_len; /* length of object name */
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__le64 snapid; /* snapid to read */
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__le64 snap_seq; /* writer's snap context */
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__le32 num_snaps;
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__le16 num_ops;
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struct ceph_osd_op ops[]; /* followed by ops[], obj, ticket, snaps */
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} __attribute__ ((packed));
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struct ceph_osd_reply_head {
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__le32 client_inc; /* client incarnation */
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__le32 flags;
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struct ceph_object_layout layout;
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__le32 osdmap_epoch;
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struct ceph_eversion reassert_version; /* for replaying uncommitted */
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__le32 result; /* result code */
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__le32 object_len; /* length of object name */
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__le32 num_ops;
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struct ceph_osd_op ops[0]; /* ops[], object */
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} __attribute__ ((packed));
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#endif
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