- 根目录:
- include
- linux
- ceph
- rados.h
#ifndef CEPH_RADOS_H
#define CEPH_RADOS_H
/*
* Data types for the Ceph distributed object storage layer RADOS
* (Reliable Autonomic Distributed Object Store).
*/
#include <linux/ceph/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
#define CEPH_PG_MAX_SIZE 16 /* max # osds in a single pg */
/*
* placement group.
* we encode this into one __le64.
*/
struct ceph_pg_v1 {
__le16 preferred; /* preferred primary osd */
__le16 ps; /* placement seed */
__le32 pool; /* object pool */
} __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_NOPOOL ((__u64) (-1)) /* pool id not defined */
#define CEPH_POOL_TYPE_REP 1
#define CEPH_POOL_TYPE_RAID4 2 /* never implemented */
#define CEPH_POOL_TYPE_EC 3
/*
* 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 {
struct ceph_pg_v1 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<<0)
#define CEPH_OSD_UP (1<<1)
#define CEPH_OSD_AUTOOUT (1<<2) /* osd was automatically marked out */
#define CEPH_OSD_NEW (1<<3) /* osd is new, never marked in */
extern const char *ceph_osd_state_name(int s);
/* osd weights. fixed point value: 0x10000 == 1.0 ("in"), 0 == "out" */
#define CEPH_OSD_IN 0x10000
#define CEPH_OSD_OUT 0
/* osd primary-affinity. fixed point value: 0x10000 == baseline */
#define CEPH_OSD_MAX_PRIMARY_AFFINITY 0x10000
#define CEPH_OSD_DEFAULT_PRIMARY_AFFINITY 0x10000
/*
* 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 */
#define CEPH_OSDMAP_NOUP (1<<5) /* block osd boot */
#define CEPH_OSDMAP_NODOWN (1<<6) /* block osd mark-down/failure */
#define CEPH_OSDMAP_NOOUT (1<<7) /* block osd auto mark-out */
#define CEPH_OSDMAP_NOIN (1<<8) /* block osd auto mark-in */
#define CEPH_OSDMAP_NOBACKFILL (1<<9) /* block osd backfill */
#define CEPH_OSDMAP_NORECOVER (1<<10) /* block osd recovery and backfill */
/*
* The error code to return when an OSD can't handle a write
* because it is too large.
*/
#define OSD_WRITETOOBIG EMSGSIZE
/*
* osd ops
*
* WARNING: do not use these op codes directly. Use the helpers
* defined below instead. In certain cases, op code behavior was
* redefined, resulting in special-cases in the helpers.
*/
#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_CACHE 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
#define CEPH_OSD_OP_TYPE_MULTI 0x0600 /* multiobject */
#define __CEPH_OSD_OP1(mode, nr) \
(CEPH_OSD_OP_MODE_##mode | (nr))
#define __CEPH_OSD_OP(mode, type, nr) \
(CEPH_OSD_OP_MODE_##mode | CEPH_OSD_OP_TYPE_##type | (nr))
#define __CEPH_FORALL_OSD_OPS(f) \
/** data **/ \
/* read */ \
f(READ, __CEPH_OSD_OP(RD, DATA, 1), "read") \
f(STAT, __CEPH_OSD_OP(RD, DATA, 2), "stat") \
f(MAPEXT, __CEPH_OSD_OP(RD, DATA, 3), "mapext") \
\
/* fancy read */ \
f(MASKTRUNC, __CEPH_OSD_OP(RD, DATA, 4), "masktrunc") \
f(SPARSE_READ, __CEPH_OSD_OP(RD, DATA, 5), "sparse-read") \
\
f(NOTIFY, __CEPH_OSD_OP(RD, DATA, 6), "notify") \
f(NOTIFY_ACK, __CEPH_OSD_OP(RD, DATA, 7), "notify-ack") \
\
/* versioning */ \
f(ASSERT_VER, __CEPH_OSD_OP(RD, DATA, 8), "assert-version") \
\
f(LIST_WATCHERS, __CEPH_OSD_OP(RD, DATA, 9), "list-watchers") \
\
f(LIST_SNAPS, __CEPH_OSD_OP(RD, DATA, 10), "list-snaps") \
\
/* sync */ \
f(SYNC_READ, __CEPH_OSD_OP(RD, DATA, 11), "sync_read") \
\
/* write */ \
f(WRITE, __CEPH_OSD_OP(WR, DATA, 1), "write") \
f(WRITEFULL, __CEPH_OSD_OP(WR, DATA, 2), "writefull") \
f(TRUNCATE, __CEPH_OSD_OP(WR, DATA, 3), "truncate") \
f(ZERO, __CEPH_OSD_OP(WR, DATA, 4), "zero") \
f(DELETE, __CEPH_OSD_OP(WR, DATA, 5), "delete") \
\
/* fancy write */ \
f(APPEND, __CEPH_OSD_OP(WR, DATA, 6), "append") \
f(STARTSYNC, __CEPH_OSD_OP(WR, DATA, 7), "startsync") \
f(SETTRUNC, __CEPH_OSD_OP(WR, DATA, 8), "settrunc") \
f(TRIMTRUNC, __CEPH_OSD_OP(WR, DATA, 9), "trimtrunc") \
\
f(TMAPUP, __CEPH_OSD_OP(RMW, DATA, 10), "tmapup") \
f(TMAPPUT, __CEPH_OSD_OP(WR, DATA, 11), "tmapput") \
f(TMAPGET, __CEPH_OSD_OP(RD, DATA, 12), "tmapget") \
\
f(CREATE, __CEPH_OSD_OP(WR, DATA, 13), "create") \
f(ROLLBACK, __CEPH_OSD_OP(WR, DATA, 14), "rollback") \
\
f(WATCH, __CEPH_OSD_OP(WR, DATA, 15), "watch") \
\
/* omap */ \
f(OMAPGETKEYS, __CEPH_OSD_OP(RD, DATA, 17), "omap-get-keys") \
f(OMAPGETVALS, __CEPH_OSD_OP(RD, DATA, 18), "omap-get-vals") \
f(OMAPGETHEADER, __CEPH_OSD_OP(RD, DATA, 19), "omap-get-header") \
f(OMAPGETVALSBYKEYS, __CEPH_OSD_OP(RD, DATA, 20), "omap-get-vals-by-keys") \
f(OMAPSETVALS, __CEPH_OSD_OP(WR, DATA, 21), "omap-set-vals") \
f(OMAPSETHEADER, __CEPH_OSD_OP(WR, DATA, 22), "omap-set-header") \
f(OMAPCLEAR, __CEPH_OSD_OP(WR, DATA, 23), "omap-clear") \
f(OMAPRMKEYS, __CEPH_OSD_OP(WR, DATA, 24), "omap-rm-keys") \
f(OMAP_CMP, __CEPH_OSD_OP(RD, DATA, 25), "omap-cmp") \
\
/* tiering */ \
f(COPY_FROM, __CEPH_OSD_OP(WR, DATA, 26), "copy-from") \
f(COPY_GET_CLASSIC, __CEPH_OSD_OP(RD, DATA, 27), "copy-get-classic") \
f(UNDIRTY, __CEPH_OSD_OP(WR, DATA, 28), "undirty") \
f(ISDIRTY, __CEPH_OSD_OP(RD, DATA, 29), "isdirty") \
f(COPY_GET, __CEPH_OSD_OP(RD, DATA, 30), "copy-get") \
f(CACHE_FLUSH, __CEPH_OSD_OP(CACHE, DATA, 31), "cache-flush") \
f(CACHE_EVICT, __CEPH_OSD_OP(CACHE, DATA, 32), "cache-evict") \
f(CACHE_TRY_FLUSH, __CEPH_OSD_OP(CACHE, DATA, 33), "cache-try-flush") \
\
/* convert tmap to omap */ \
f(TMAP2OMAP, __CEPH_OSD_OP(RMW, DATA, 34), "tmap2omap") \
\
/* hints */ \
f(SETALLOCHINT, __CEPH_OSD_OP(WR, DATA, 35), "set-alloc-hint") \
\
/** multi **/ \
f(CLONERANGE, __CEPH_OSD_OP(WR, MULTI, 1), "clonerange") \
f(ASSERT_SRC_VERSION, __CEPH_OSD_OP(RD, MULTI, 2), "assert-src-version") \
f(SRC_CMPXATTR, __CEPH_OSD_OP(RD, MULTI, 3), "src-cmpxattr") \
\
/** attrs **/ \
/* read */ \
f(GETXATTR, __CEPH_OSD_OP(RD, ATTR, 1), "getxattr") \
f(GETXATTRS, __CEPH_OSD_OP(RD, ATTR, 2), "getxattrs") \
f(CMPXATTR, __CEPH_OSD_OP(RD, ATTR, 3), "cmpxattr") \
\
/* write */ \
f(SETXATTR, __CEPH_OSD_OP(WR, ATTR, 1), "setxattr") \
f(SETXATTRS, __CEPH_OSD_OP(WR, ATTR, 2), "setxattrs") \
f(RESETXATTRS, __CEPH_OSD_OP(WR, ATTR, 3), "resetxattrs") \
f(RMXATTR, __CEPH_OSD_OP(WR, ATTR, 4), "rmxattr") \
\
/** subop **/ \
f(PULL, __CEPH_OSD_OP1(SUB, 1), "pull") \
f(PUSH, __CEPH_OSD_OP1(SUB, 2), "push") \
f(BALANCEREADS, __CEPH_OSD_OP1(SUB, 3), "balance-reads") \
f(UNBALANCEREADS, __CEPH_OSD_OP1(SUB, 4), "unbalance-reads") \
f(SCRUB, __CEPH_OSD_OP1(SUB, 5), "scrub") \
f(SCRUB_RESERVE, __CEPH_OSD_OP1(SUB, 6), "scrub-reserve") \
f(SCRUB_UNRESERVE, __CEPH_OSD_OP1(SUB, 7), "scrub-unreserve") \
f(SCRUB_STOP, __CEPH_OSD_OP1(SUB, 8), "scrub-stop") \
f(SCRUB_MAP, __CEPH_OSD_OP1(SUB, 9), "scrub-map") \
\
/** lock **/ \
f(WRLOCK, __CEPH_OSD_OP(WR, LOCK, 1), "wrlock") \
f(WRUNLOCK, __CEPH_OSD_OP(WR, LOCK, 2), "wrunlock") \
f(RDLOCK, __CEPH_OSD_OP(WR, LOCK, 3), "rdlock") \
f(RDUNLOCK, __CEPH_OSD_OP(WR, LOCK, 4), "rdunlock") \
f(UPLOCK, __CEPH_OSD_OP(WR, LOCK, 5), "uplock") \
f(DNLOCK, __CEPH_OSD_OP(WR, LOCK, 6), "dnlock") \
\
/** exec **/ \
/* note: the RD bit here is wrong; see special-case below in helper */ \
f(CALL, __CEPH_OSD_OP(RD, EXEC, 1), "call") \
\
/** pg **/ \
f(PGLS, __CEPH_OSD_OP(RD, PG, 1), "pgls") \
f(PGLS_FILTER, __CEPH_OSD_OP(RD, PG, 2), "pgls-filter") \
f(PG_HITSET_LS, __CEPH_OSD_OP(RD, PG, 3), "pg-hitset-ls") \
f(PG_HITSET_GET, __CEPH_OSD_OP(RD, PG, 4), "pg-hitset-get")
enum {
#define GENERATE_ENUM_ENTRY(op, opcode, str) CEPH_OSD_OP_##op = (opcode),
__CEPH_FORALL_OSD_OPS(GENERATE_ENUM_ENTRY)
#undef GENERATE_ENUM_ENTRY
};
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_type_multi(int op)
{
return (op & CEPH_OSD_OP_TYPE) == CEPH_OSD_OP_TYPE_MULTI;
}
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_RD) &&
op != CEPH_OSD_OP_CALL;
}
static inline int ceph_osd_op_mode_modify(int op)
{
return op & CEPH_OSD_OP_MODE_WR;
}
/*
* note that the following tmap stuff is also defined in the ceph librados.h
* any modification here needs to be updated there
*/
#define CEPH_OSD_TMAP_HDR 'h'
#define CEPH_OSD_TMAP_SET 's'
#define CEPH_OSD_TMAP_CREATE 'c' /* create key */
#define CEPH_OSD_TMAP_RM 'r'
#define CEPH_OSD_TMAP_RMSLOPPY '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 = 0x0001, /* want (or is) "ack" ack */
CEPH_OSD_FLAG_ONNVRAM = 0x0002, /* want (or is) "onnvram" ack */
CEPH_OSD_FLAG_ONDISK = 0x0004, /* want (or is) "ondisk" ack */
CEPH_OSD_FLAG_RETRY = 0x0008, /* resend attempt */
CEPH_OSD_FLAG_READ = 0x0010, /* op may read */
CEPH_OSD_FLAG_WRITE = 0x0020, /* op may write */
CEPH_OSD_FLAG_ORDERSNAP = 0x0040, /* EOLDSNAP if snapc is out of order */
CEPH_OSD_FLAG_PEERSTAT_OLD = 0x0080, /* DEPRECATED msg includes osd_peer_stat */
CEPH_OSD_FLAG_BALANCE_READS = 0x0100,
CEPH_OSD_FLAG_PARALLELEXEC = 0x0200, /* execute op in parallel */
CEPH_OSD_FLAG_PGOP = 0x0400, /* pg op, no object */
CEPH_OSD_FLAG_EXEC = 0x0800, /* op may exec */
CEPH_OSD_FLAG_EXEC_PUBLIC = 0x1000, /* DEPRECATED op may exec (public) */
CEPH_OSD_FLAG_LOCALIZE_READS = 0x2000, /* read from nearby replica, if any */
CEPH_OSD_FLAG_RWORDERED = 0x4000, /* order wrt concurrent reads */
CEPH_OSD_FLAG_IGNORE_CACHE = 0x8000, /* ignore cache logic */
CEPH_OSD_FLAG_SKIPRWLOCKS = 0x10000, /* skip rw locks */
CEPH_OSD_FLAG_IGNORE_OVERLAY = 0x20000, /* ignore pool overlay */
CEPH_OSD_FLAG_FLUSH = 0x40000, /* this is part of flush */
};
enum {
CEPH_OSD_OP_FLAG_EXCL = 1, /* EXCL object create */
CEPH_OSD_OP_FLAG_FAILOK = 2, /* continue despite failure */
};
#define EOLDSNAPC ERESTART /* ORDERSNAP flag set; writer has old snapc*/
#define EBLACKLISTED ESHUTDOWN /* blacklisted */
/* xattr comparison */
enum {
CEPH_OSD_CMPXATTR_OP_NOP = 0,
CEPH_OSD_CMPXATTR_OP_EQ = 1,
CEPH_OSD_CMPXATTR_OP_NE = 2,
CEPH_OSD_CMPXATTR_OP_GT = 3,
CEPH_OSD_CMPXATTR_OP_GTE = 4,
CEPH_OSD_CMPXATTR_OP_LT = 5,
CEPH_OSD_CMPXATTR_OP_LTE = 6
};
enum {
CEPH_OSD_CMPXATTR_MODE_STRING = 1,
CEPH_OSD_CMPXATTR_MODE_U64 = 2
};
#define RADOS_NOTIFY_VER 1
/*
* 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_OP_FLAG_* */
union {
struct {
__le64 offset, length;
__le64 truncate_size;
__le32 truncate_seq;
} __attribute__ ((packed)) extent;
struct {
__le32 name_len;
__le32 value_len;
__u8 cmp_op; /* CEPH_OSD_CMPXATTR_OP_* */
__u8 cmp_mode; /* CEPH_OSD_CMPXATTR_MODE_* */
} __attribute__ ((packed)) xattr;
struct {
__u8 class_len;
__u8 method_len;
__u8 argc;
__le32 indata_len;
} __attribute__ ((packed)) cls;
struct {
__le64 cookie, count;
} __attribute__ ((packed)) pgls;
struct {
__le64 snapid;
} __attribute__ ((packed)) snap;
struct {
__le64 cookie;
__le64 ver;
__u8 flag; /* 0 = unwatch, 1 = watch */
} __attribute__ ((packed)) watch;
struct {
__le64 offset, length;
__le64 src_offset;
} __attribute__ ((packed)) clonerange;
struct {
__le64 expected_object_size;
__le64 expected_write_size;
} __attribute__ ((packed)) alloc_hint;
};
__le32 payload_len;
} __attribute__ ((packed));
#endif