forked from luck/tmp_suning_uos_patched
0dee3c28af
These headers describe the types used to exchange messages between the Ceph client and various servers. All types are little-endian and packed. These headers are shared between the kernel and userspace, so all types are in terms of e.g. __u32. Additionally, we define a few magic values to identify the current version of the protocol(s) in use, so that discrepancies to be detected on mount. Signed-off-by: Sage Weil <sage@newdream.net>
373 lines
11 KiB
C
373 lines
11 KiB
C
#ifndef __RADOS_H
|
|
#define __RADOS_H
|
|
|
|
/*
|
|
* Data types for the Ceph distributed object storage layer RADOS
|
|
* (Reliable Autonomic Distributed Object Store).
|
|
*/
|
|
|
|
#include "msgr.h"
|
|
|
|
/*
|
|
* fs id
|
|
*/
|
|
struct ceph_fsid {
|
|
unsigned char fsid[16];
|
|
};
|
|
|
|
static inline int ceph_fsid_compare(const struct ceph_fsid *a,
|
|
const struct ceph_fsid *b)
|
|
{
|
|
return memcmp(a, b, sizeof(*a));
|
|
}
|
|
|
|
/*
|
|
* ino, object, etc.
|
|
*/
|
|
typedef __le64 ceph_snapid_t;
|
|
#define CEPH_SNAPDIR ((__u64)(-1)) /* reserved for hidden .snap dir */
|
|
#define CEPH_NOSNAP ((__u64)(-2)) /* "head", "live" revision */
|
|
#define CEPH_MAXSNAP ((__u64)(-3)) /* largest valid snapid */
|
|
|
|
struct ceph_timespec {
|
|
__le32 tv_sec;
|
|
__le32 tv_nsec;
|
|
} __attribute__ ((packed));
|
|
|
|
|
|
/*
|
|
* object layout - how objects are mapped into PGs
|
|
*/
|
|
#define CEPH_OBJECT_LAYOUT_HASH 1
|
|
#define CEPH_OBJECT_LAYOUT_LINEAR 2
|
|
#define CEPH_OBJECT_LAYOUT_HASHINO 3
|
|
|
|
/*
|
|
* pg layout -- how PGs are mapped onto (sets of) OSDs
|
|
*/
|
|
#define CEPH_PG_LAYOUT_CRUSH 0
|
|
#define CEPH_PG_LAYOUT_HASH 1
|
|
#define CEPH_PG_LAYOUT_LINEAR 2
|
|
#define CEPH_PG_LAYOUT_HYBRID 3
|
|
|
|
|
|
/*
|
|
* placement group.
|
|
* we encode this into one __le64.
|
|
*/
|
|
union ceph_pg {
|
|
__u64 pg64;
|
|
struct {
|
|
__s16 preferred; /* preferred primary osd */
|
|
__u16 ps; /* placement seed */
|
|
__u32 pool; /* object pool */
|
|
} __attribute__ ((packed)) pg;
|
|
} __attribute__ ((packed));
|
|
|
|
/*
|
|
* pg_pool is a set of pgs storing a pool of objects
|
|
*
|
|
* pg_num -- base number of pseudorandomly placed pgs
|
|
*
|
|
* pgp_num -- effective number when calculating pg placement. this
|
|
* is used for pg_num increases. new pgs result in data being "split"
|
|
* into new pgs. for this to proceed smoothly, new pgs are intiially
|
|
* colocated with their parents; that is, pgp_num doesn't increase
|
|
* until the new pgs have successfully split. only _then_ are the new
|
|
* pgs placed independently.
|
|
*
|
|
* lpg_num -- localized pg count (per device). replicas are randomly
|
|
* selected.
|
|
*
|
|
* lpgp_num -- as above.
|
|
*/
|
|
#define CEPH_PG_TYPE_REP 1
|
|
#define CEPH_PG_TYPE_RAID4 2
|
|
struct ceph_pg_pool {
|
|
__u8 type; /* CEPH_PG_TYPE_* */
|
|
__u8 size; /* number of osds in each pg */
|
|
__u8 crush_ruleset; /* crush placement rule */
|
|
__le32 pg_num, pgp_num; /* number of pg's */
|
|
__le32 lpg_num, lpgp_num; /* number of localized pg's */
|
|
__le32 last_change; /* most recent epoch changed */
|
|
__le64 snap_seq; /* seq for per-pool snapshot */
|
|
__le32 snap_epoch; /* epoch of last snap */
|
|
__le32 num_snaps;
|
|
__le32 num_removed_snap_intervals;
|
|
} __attribute__ ((packed));
|
|
|
|
/*
|
|
* stable_mod func is used to control number of placement groups.
|
|
* similar to straight-up modulo, but produces a stable mapping as b
|
|
* increases over time. b is the number of bins, and bmask is the
|
|
* containing power of 2 minus 1.
|
|
*
|
|
* b <= bmask and bmask=(2**n)-1
|
|
* e.g., b=12 -> bmask=15, b=123 -> bmask=127
|
|
*/
|
|
static inline int ceph_stable_mod(int x, int b, int bmask)
|
|
{
|
|
if ((x & bmask) < b)
|
|
return x & bmask;
|
|
else
|
|
return x & (bmask >> 1);
|
|
}
|
|
|
|
/*
|
|
* object layout - how a given object should be stored.
|
|
*/
|
|
struct ceph_object_layout {
|
|
__le64 ol_pgid; /* raw pg, with _full_ ps precision. */
|
|
__le32 ol_stripe_unit; /* for per-object parity, if any */
|
|
} __attribute__ ((packed));
|
|
|
|
/*
|
|
* compound epoch+version, used by storage layer to serialize mutations
|
|
*/
|
|
struct ceph_eversion {
|
|
__le32 epoch;
|
|
__le64 version;
|
|
} __attribute__ ((packed));
|
|
|
|
/*
|
|
* osd map bits
|
|
*/
|
|
|
|
/* status bits */
|
|
#define CEPH_OSD_EXISTS 1
|
|
#define CEPH_OSD_UP 2
|
|
|
|
/* osd weights. fixed point value: 0x10000 == 1.0 ("in"), 0 == "out" */
|
|
#define CEPH_OSD_IN 0x10000
|
|
#define CEPH_OSD_OUT 0
|
|
|
|
|
|
/*
|
|
* osd map flag bits
|
|
*/
|
|
#define CEPH_OSDMAP_NEARFULL (1<<0) /* sync writes (near ENOSPC) */
|
|
#define CEPH_OSDMAP_FULL (1<<1) /* no data writes (ENOSPC) */
|
|
#define CEPH_OSDMAP_PAUSERD (1<<2) /* pause all reads */
|
|
#define CEPH_OSDMAP_PAUSEWR (1<<3) /* pause all writes */
|
|
#define CEPH_OSDMAP_PAUSEREC (1<<4) /* pause recovery */
|
|
|
|
/*
|
|
* osd ops
|
|
*/
|
|
#define CEPH_OSD_OP_MODE 0xf000
|
|
#define CEPH_OSD_OP_MODE_RD 0x1000
|
|
#define CEPH_OSD_OP_MODE_WR 0x2000
|
|
#define CEPH_OSD_OP_MODE_RMW 0x3000
|
|
#define CEPH_OSD_OP_MODE_SUB 0x4000
|
|
#define CEPH_OSD_OP_MODE_EXEC 0x8000
|
|
|
|
#define CEPH_OSD_OP_TYPE 0x0f00
|
|
#define CEPH_OSD_OP_TYPE_LOCK 0x0100
|
|
#define CEPH_OSD_OP_TYPE_DATA 0x0200
|
|
#define CEPH_OSD_OP_TYPE_ATTR 0x0300
|
|
#define CEPH_OSD_OP_TYPE_EXEC 0x0400
|
|
#define CEPH_OSD_OP_TYPE_PG 0x0500
|
|
|
|
enum {
|
|
/** data **/
|
|
/* read */
|
|
CEPH_OSD_OP_READ = CEPH_OSD_OP_MODE_RD | CEPH_OSD_OP_TYPE_DATA | 1,
|
|
CEPH_OSD_OP_STAT = CEPH_OSD_OP_MODE_RD | CEPH_OSD_OP_TYPE_DATA | 2,
|
|
|
|
/* fancy read */
|
|
CEPH_OSD_OP_MASKTRUNC = CEPH_OSD_OP_MODE_RD | CEPH_OSD_OP_TYPE_DATA | 4,
|
|
|
|
/* write */
|
|
CEPH_OSD_OP_WRITE = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_DATA | 1,
|
|
CEPH_OSD_OP_WRITEFULL = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_DATA | 2,
|
|
CEPH_OSD_OP_TRUNCATE = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_DATA | 3,
|
|
CEPH_OSD_OP_ZERO = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_DATA | 4,
|
|
CEPH_OSD_OP_DELETE = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_DATA | 5,
|
|
|
|
/* fancy write */
|
|
CEPH_OSD_OP_APPEND = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_DATA | 6,
|
|
CEPH_OSD_OP_STARTSYNC = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_DATA | 7,
|
|
CEPH_OSD_OP_SETTRUNC = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_DATA | 8,
|
|
CEPH_OSD_OP_TRIMTRUNC = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_DATA | 9,
|
|
|
|
CEPH_OSD_OP_TMAPUP = CEPH_OSD_OP_MODE_RMW | CEPH_OSD_OP_TYPE_DATA | 10,
|
|
CEPH_OSD_OP_TMAPPUT = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_DATA | 11,
|
|
CEPH_OSD_OP_TMAPGET = CEPH_OSD_OP_MODE_RD | CEPH_OSD_OP_TYPE_DATA | 12,
|
|
|
|
CEPH_OSD_OP_CREATE = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_DATA | 13,
|
|
|
|
/** attrs **/
|
|
/* read */
|
|
CEPH_OSD_OP_GETXATTR = CEPH_OSD_OP_MODE_RD | CEPH_OSD_OP_TYPE_ATTR | 1,
|
|
CEPH_OSD_OP_GETXATTRS = CEPH_OSD_OP_MODE_RD | CEPH_OSD_OP_TYPE_ATTR | 2,
|
|
|
|
/* write */
|
|
CEPH_OSD_OP_SETXATTR = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_ATTR | 1,
|
|
CEPH_OSD_OP_SETXATTRS = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_ATTR | 2,
|
|
CEPH_OSD_OP_RESETXATTRS = CEPH_OSD_OP_MODE_WR|CEPH_OSD_OP_TYPE_ATTR | 3,
|
|
CEPH_OSD_OP_RMXATTR = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_ATTR | 4,
|
|
|
|
/** subop **/
|
|
CEPH_OSD_OP_PULL = CEPH_OSD_OP_MODE_SUB | 1,
|
|
CEPH_OSD_OP_PUSH = CEPH_OSD_OP_MODE_SUB | 2,
|
|
CEPH_OSD_OP_BALANCEREADS = CEPH_OSD_OP_MODE_SUB | 3,
|
|
CEPH_OSD_OP_UNBALANCEREADS = CEPH_OSD_OP_MODE_SUB | 4,
|
|
CEPH_OSD_OP_SCRUB = CEPH_OSD_OP_MODE_SUB | 5,
|
|
|
|
/** lock **/
|
|
CEPH_OSD_OP_WRLOCK = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_LOCK | 1,
|
|
CEPH_OSD_OP_WRUNLOCK = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_LOCK | 2,
|
|
CEPH_OSD_OP_RDLOCK = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_LOCK | 3,
|
|
CEPH_OSD_OP_RDUNLOCK = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_LOCK | 4,
|
|
CEPH_OSD_OP_UPLOCK = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_LOCK | 5,
|
|
CEPH_OSD_OP_DNLOCK = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_LOCK | 6,
|
|
|
|
/** exec **/
|
|
CEPH_OSD_OP_CALL = CEPH_OSD_OP_MODE_RD | CEPH_OSD_OP_TYPE_EXEC | 1,
|
|
|
|
/** pg **/
|
|
CEPH_OSD_OP_PGLS = CEPH_OSD_OP_MODE_RD | CEPH_OSD_OP_TYPE_PG | 1,
|
|
};
|
|
|
|
static inline int ceph_osd_op_type_lock(int op)
|
|
{
|
|
return (op & CEPH_OSD_OP_TYPE) == CEPH_OSD_OP_TYPE_LOCK;
|
|
}
|
|
static inline int ceph_osd_op_type_data(int op)
|
|
{
|
|
return (op & CEPH_OSD_OP_TYPE) == CEPH_OSD_OP_TYPE_DATA;
|
|
}
|
|
static inline int ceph_osd_op_type_attr(int op)
|
|
{
|
|
return (op & CEPH_OSD_OP_TYPE) == CEPH_OSD_OP_TYPE_ATTR;
|
|
}
|
|
static inline int ceph_osd_op_type_exec(int op)
|
|
{
|
|
return (op & CEPH_OSD_OP_TYPE) == CEPH_OSD_OP_TYPE_EXEC;
|
|
}
|
|
static inline int ceph_osd_op_type_pg(int op)
|
|
{
|
|
return (op & CEPH_OSD_OP_TYPE) == CEPH_OSD_OP_TYPE_PG;
|
|
}
|
|
|
|
static inline int ceph_osd_op_mode_subop(int op)
|
|
{
|
|
return (op & CEPH_OSD_OP_MODE) == CEPH_OSD_OP_MODE_SUB;
|
|
}
|
|
static inline int ceph_osd_op_mode_read(int op)
|
|
{
|
|
return (op & CEPH_OSD_OP_MODE) == CEPH_OSD_OP_MODE_RD;
|
|
}
|
|
static inline int ceph_osd_op_mode_modify(int op)
|
|
{
|
|
return (op & CEPH_OSD_OP_MODE) == CEPH_OSD_OP_MODE_WR;
|
|
}
|
|
|
|
#define CEPH_OSD_TMAP_HDR 'h'
|
|
#define CEPH_OSD_TMAP_SET 's'
|
|
#define CEPH_OSD_TMAP_RM 'r'
|
|
|
|
extern const char *ceph_osd_op_name(int op);
|
|
|
|
|
|
/*
|
|
* osd op flags
|
|
*
|
|
* An op may be READ, WRITE, or READ|WRITE.
|
|
*/
|
|
enum {
|
|
CEPH_OSD_FLAG_ACK = 1, /* want (or is) "ack" ack */
|
|
CEPH_OSD_FLAG_ONNVRAM = 2, /* want (or is) "onnvram" ack */
|
|
CEPH_OSD_FLAG_ONDISK = 4, /* want (or is) "ondisk" ack */
|
|
CEPH_OSD_FLAG_RETRY = 8, /* resend attempt */
|
|
CEPH_OSD_FLAG_READ = 16, /* op may read */
|
|
CEPH_OSD_FLAG_WRITE = 32, /* op may write */
|
|
CEPH_OSD_FLAG_ORDERSNAP = 64, /* EOLDSNAP if snapc is out of order */
|
|
CEPH_OSD_FLAG_PEERSTAT = 128, /* msg includes osd_peer_stat */
|
|
CEPH_OSD_FLAG_BALANCE_READS = 256,
|
|
CEPH_OSD_FLAG_PARALLELEXEC = 512, /* execute op in parallel */
|
|
CEPH_OSD_FLAG_PGOP = 1024, /* pg op, no object */
|
|
};
|
|
|
|
enum {
|
|
CEPH_OSD_OP_FLAG_EXCL = 1, /* EXCL object create */
|
|
};
|
|
|
|
#define EOLDSNAPC ERESTART /* ORDERSNAP flag set; writer has old snapc*/
|
|
#define EBLACKLISTED ESHUTDOWN /* blacklisted */
|
|
|
|
/*
|
|
* an individual object operation. each may be accompanied by some data
|
|
* payload
|
|
*/
|
|
struct ceph_osd_op {
|
|
__le16 op; /* CEPH_OSD_OP_* */
|
|
__le32 flags; /* CEPH_OSD_FLAG_* */
|
|
union {
|
|
struct {
|
|
__le64 offset, length;
|
|
} __attribute__ ((packed)) extent;
|
|
struct {
|
|
__le32 name_len;
|
|
__le32 value_len;
|
|
} __attribute__ ((packed)) xattr;
|
|
struct {
|
|
__le64 truncate_size;
|
|
__le32 truncate_seq;
|
|
} __attribute__ ((packed)) trunc;
|
|
struct {
|
|
__u8 class_len;
|
|
__u8 method_len;
|
|
__u8 argc;
|
|
__le32 indata_len;
|
|
} __attribute__ ((packed)) cls;
|
|
struct {
|
|
__le64 cookie, count;
|
|
} __attribute__ ((packed)) pgls;
|
|
};
|
|
__le32 payload_len;
|
|
} __attribute__ ((packed));
|
|
|
|
/*
|
|
* osd request message header. each request may include multiple
|
|
* ceph_osd_op object operations.
|
|
*/
|
|
struct ceph_osd_request_head {
|
|
__le64 tid; /* transaction id */
|
|
__le32 client_inc; /* client incarnation */
|
|
struct ceph_object_layout layout; /* pgid */
|
|
__le32 osdmap_epoch; /* client's osdmap epoch */
|
|
|
|
__le32 flags;
|
|
|
|
struct ceph_timespec mtime; /* for mutations only */
|
|
struct ceph_eversion reassert_version; /* if we are replaying op */
|
|
|
|
__le32 object_len; /* length of object name */
|
|
|
|
__le64 snapid; /* snapid to read */
|
|
__le64 snap_seq; /* writer's snap context */
|
|
__le32 num_snaps;
|
|
|
|
__le16 num_ops;
|
|
struct ceph_osd_op ops[]; /* followed by ops[], obj, ticket, snaps */
|
|
} __attribute__ ((packed));
|
|
|
|
struct ceph_osd_reply_head {
|
|
__le64 tid; /* transaction id */
|
|
__le32 client_inc; /* client incarnation */
|
|
__le32 flags;
|
|
struct ceph_object_layout layout;
|
|
__le32 osdmap_epoch;
|
|
struct ceph_eversion reassert_version; /* for replaying uncommitted */
|
|
|
|
__le32 result; /* result code */
|
|
|
|
__le32 object_len; /* length of object name */
|
|
__le32 num_ops;
|
|
struct ceph_osd_op ops[0]; /* ops[], object */
|
|
} __attribute__ ((packed));
|
|
|
|
|
|
#endif
|