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linux-next/include/linux/ceph/rados.h
Sage Weil 1b83bef24c libceph: update osd request/reply encoding 
Use the new version of the encoding for osd requests and replies.  In the
process, update the way we are tracking request ops and reply lengths and
results in the struct ceph_osd_request.  Update the rbd and fs/ceph users
appropriately.

The main changes are:
 - we keep pointers into the request memory for fields we need to update
   each time the request is sent out over the wire
 - we keep information about the result in an array in the request struct
   where the users can easily get at it.

Signed-off-by: Sage Weil <sage@inktank.com>
Reviewed-by: Alex Elder <elder@inktank.com>
2013-02-26 15:02:50 -08:00

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#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_PG_TYPE_REP 1
#define CEPH_PG_TYPE_RAID4 2
/*
* 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 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_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 */
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,
CEPH_OSD_OP_MAPEXT = CEPH_OSD_OP_MODE_RD | CEPH_OSD_OP_TYPE_DATA | 3,
/* fancy read */
CEPH_OSD_OP_MASKTRUNC = CEPH_OSD_OP_MODE_RD | CEPH_OSD_OP_TYPE_DATA | 4,
CEPH_OSD_OP_SPARSE_READ = CEPH_OSD_OP_MODE_RD | CEPH_OSD_OP_TYPE_DATA | 5,
CEPH_OSD_OP_NOTIFY = CEPH_OSD_OP_MODE_RD | CEPH_OSD_OP_TYPE_DATA | 6,
CEPH_OSD_OP_NOTIFY_ACK = CEPH_OSD_OP_MODE_RD | CEPH_OSD_OP_TYPE_DATA | 7,
/* versioning */
CEPH_OSD_OP_ASSERT_VER = CEPH_OSD_OP_MODE_RD | CEPH_OSD_OP_TYPE_DATA | 8,
/* 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,
CEPH_OSD_OP_ROLLBACK= CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_DATA | 14,
CEPH_OSD_OP_WATCH = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_DATA | 15,
/* omap */
CEPH_OSD_OP_OMAPGETKEYS = CEPH_OSD_OP_MODE_RD | CEPH_OSD_OP_TYPE_DATA | 17,
CEPH_OSD_OP_OMAPGETVALS = CEPH_OSD_OP_MODE_RD | CEPH_OSD_OP_TYPE_DATA | 18,
CEPH_OSD_OP_OMAPGETHEADER = CEPH_OSD_OP_MODE_RD | CEPH_OSD_OP_TYPE_DATA | 19,
CEPH_OSD_OP_OMAPGETVALSBYKEYS =
CEPH_OSD_OP_MODE_RD | CEPH_OSD_OP_TYPE_DATA | 20,
CEPH_OSD_OP_OMAPSETVALS = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_DATA | 21,
CEPH_OSD_OP_OMAPSETHEADER = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_DATA | 22,
CEPH_OSD_OP_OMAPCLEAR = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_DATA | 23,
CEPH_OSD_OP_OMAPRMKEYS = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_DATA | 24,
CEPH_OSD_OP_OMAP_CMP = CEPH_OSD_OP_MODE_RD | CEPH_OSD_OP_TYPE_DATA | 25,
/** multi **/
CEPH_OSD_OP_CLONERANGE = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_MULTI | 1,
CEPH_OSD_OP_ASSERT_SRC_VERSION = CEPH_OSD_OP_MODE_RD | CEPH_OSD_OP_TYPE_MULTI | 2,
CEPH_OSD_OP_SRC_CMPXATTR = CEPH_OSD_OP_MODE_RD | CEPH_OSD_OP_TYPE_MULTI | 3,
/** 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,
CEPH_OSD_OP_CMPXATTR = CEPH_OSD_OP_MODE_RD | CEPH_OSD_OP_TYPE_ATTR | 3,
/* 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,
CEPH_OSD_OP_SCRUB_RESERVE = CEPH_OSD_OP_MODE_SUB | 6,
CEPH_OSD_OP_SCRUB_UNRESERVE = CEPH_OSD_OP_MODE_SUB | 7,
CEPH_OSD_OP_SCRUB_STOP = CEPH_OSD_OP_MODE_SUB | 8,
CEPH_OSD_OP_SCRUB_MAP = CEPH_OSD_OP_MODE_SUB | 9,
/** 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 **/
/* note: the RD bit here is wrong; see special-case below in helper */
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,
CEPH_OSD_OP_PGLS_FILTER = CEPH_OSD_OP_MODE_RD | CEPH_OSD_OP_TYPE_PG | 2,
};
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 */
};
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_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;
};
__le32 payload_len;
} __attribute__ ((packed));
#endif
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