[PATCH 02/19] ceph: on-wire types
From: Sage Weil
Date: Thu Nov 13 2008 - 20:27:30 EST
This header describes the types used to exchange messages between the
Ceph client and various servers. All types are little-endian and
packed.
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@xxxxxxxxxxxx>
---
fs/ceph/ceph_fs.h | 1225 +++++++++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 1225 insertions(+), 0 deletions(-)
create mode 100644 fs/ceph/ceph_fs.h
diff --git a/fs/ceph/ceph_fs.h b/fs/ceph/ceph_fs.h
new file mode 100644
index 0000000..16b9d50
--- /dev/null
+++ b/fs/ceph/ceph_fs.h
@@ -0,0 +1,1225 @@
+/*
+ * ceph_fs.h - Ceph constants and data types to share between kernel and
+ * user space.
+ *
+ * LGPL2
+ */
+
+#ifndef _FS_CEPH_CEPH_FS_H
+#define _FS_CEPH_CEPH_FS_H
+
+
+#define CEPH_MON_PORT 12345
+
+/*
+ * Max file size is a policy choice; in reality we are limited
+ * by 2^64.
+ */
+#define CEPH_FILE_MAX_SIZE (1ULL << 40) /* 1 TB */
+
+/*
+ * tcp connection banner. include a protocol version. and adjust
+ * whenever the wire protocol changes. try to keep this string length
+ * constant.
+ */
+#define CEPH_BANNER "ceph 007\n"
+#define CEPH_BANNER_MAX_LEN 30
+
+/*
+ * subprotocol versions. when specific messages types or high-level
+ * protocols change, bump the affected components.
+ */
+#define CEPH_OSD_PROTOCOL 3
+#define CEPH_MDS_PROTOCOL 2
+#define CEPH_MON_PROTOCOL 2
+#define CEPH_CLIENT_PROTOCOL 1
+#define CEPH_ONDISK_FORMAT 1
+
+/*
+ * types in this file are defined as little-endian, and are
+ * primarily intended to describe data structures that pass
+ * over the wire or that are stored on disk.
+ */
+
+/*
+ * some basics
+ */
+typedef __le64 ceph_version_t;
+typedef __le64 ceph_tid_t; /* transaction id */
+typedef __le32 ceph_epoch_t;
+
+
+/*
+ * fs id
+ */
+struct ceph_fsid {
+ __le64 major;
+ __le64 minor;
+} __attribute__ ((packed));
+
+static inline int ceph_fsid_equal(const struct ceph_fsid *a,
+ const struct ceph_fsid *b)
+{
+ return a->major == b->major && a->minor == b->minor;
+}
+
+
+/*
+ * ino, object, etc.
+ */
+#define CEPH_INO_ROOT 1
+
+typedef __le64 ceph_snapid_t;
+#define CEPH_MAXSNAP ((__u64)(-3))
+#define CEPH_SNAPDIR ((__u64)(-1))
+#define CEPH_NOSNAP ((__u64)(-2))
+
+struct ceph_object {
+ union {
+ __u8 raw[20]; /* fits a sha1 hash */
+ struct {
+ __le64 ino; /* inode "file" identifier */
+ __le32 bno; /* "block" (object) in that "file" */
+ __le64 snap; /* snapshot id. usually NOSNAP. */
+ } __attribute__ ((packed));
+ };
+} __attribute__ ((packed));
+
+struct ceph_timespec {
+ __le32 tv_sec;
+ __le32 tv_nsec;
+} __attribute__ ((packed));
+
+
+/*
+ * "Frags" are a way to describe a subset of a 32-bit number space,
+ * using a mask and a value to match against that mask. Any given frag
+ * (subset of the number space) can be partitioned into 2^n sub-frags.
+ *
+ * Frags are encoded into a 32-bit word:
+ * 8 upper bits = "bits"
+ * 24 lower bits = "value"
+ * (We could go to 5+27 bits, but who cares.)
+ *
+ * We use the _most_ significant bits of the 24 bit value. This makes
+ * values logically sort.
+ *
+ * Unfortunately, because the "bits" field is still in the high bits, we
+ * can't sort encoded frags numerically. However, it does allow you
+ * to feed encoded frags as values into frag_contains_value.
+ */
+static inline __u32 frag_make(__u32 b, __u32 v)
+{
+ return (b << 24) |
+ (v & (0xffffffu << (24-b)) & 0xffffffu);
+}
+static inline __u32 frag_bits(__u32 f)
+{
+ return f >> 24;
+}
+static inline __u32 frag_value(__u32 f)
+{
+ return f & 0xffffffu;
+}
+static inline __u32 frag_mask(__u32 f)
+{
+ return (0xffffffu << (24-frag_bits(f))) & 0xffffffu;
+}
+static inline __u32 frag_mask_shift(__u32 f)
+{
+ return 24 - frag_bits(f);
+}
+
+static inline int frag_contains_value(__u32 f, __u32 v)
+{
+ return (v & frag_mask(f)) == frag_value(f);
+}
+static inline int frag_contains_frag(__u32 f, __u32 sub)
+{
+ /* is sub as specific as us, and contained by us? */
+ return frag_bits(sub) >= frag_bits(f) &&
+ (frag_value(sub) & frag_mask(f)) == frag_value(f);
+}
+
+static inline __u32 frag_parent(__u32 f)
+{
+ return frag_make(frag_bits(f) - 1,
+ frag_value(f) & (frag_mask(f) << 1));
+}
+static inline int frag_is_left_child(__u32 f)
+{
+ return frag_bits(f) > 0 &&
+ (frag_value(f) & (0x1000000 >> frag_bits(f))) == 0;
+}
+static inline int frag_is_right_child(__u32 f)
+{
+ return frag_bits(f) > 0 &&
+ (frag_value(f) & (0x1000000 >> frag_bits(f))) == 1;
+}
+static inline __u32 frag_sibling(__u32 f)
+{
+ return frag_make(frag_bits(f),
+ frag_value(f) ^ (0x1000000 >> frag_bits(f)));
+}
+static inline __u32 frag_left_child(__u32 f)
+{
+ return frag_make(frag_bits(f)+1, frag_value(f));
+}
+static inline __u32 frag_right_child(__u32 f)
+{
+ return frag_make(frag_bits(f)+1,
+ frag_value(f) | (0x1000000 >> (1+frag_bits(f))));
+}
+static inline __u32 frag_make_child(__u32 f, int by, int i)
+{
+ int newbits = frag_bits(f) + by;
+ return frag_make(newbits,
+ frag_value(f) | (i << (24 - newbits)));
+}
+static inline int frag_is_leftmost(__u32 f)
+{
+ return frag_value(f) == 0;
+}
+static inline int frag_is_rightmost(__u32 f)
+{
+ return frag_value(f) == frag_mask(f);
+}
+static inline __u32 frag_next(__u32 f)
+{
+ return frag_make(frag_bits(f),
+ frag_value(f) + (0x1000000 >> frag_bits(f)));
+}
+
+/*
+ * comparator to sort frags logically, as when traversing the
+ * number space in ascending order...
+ */
+static inline int frag_compare(__u32 a, __u32 b)
+{
+ unsigned va = frag_value(a);
+ unsigned vb = frag_value(b);
+ if (va < vb)
+ return -1;
+ if (va > vb)
+ return 1;
+ va = frag_bits(a);
+ vb = frag_bits(b);
+ if (va < vb)
+ return -1;
+ if (va > vb)
+ return 1;
+ return 0;
+}
+
+/*
+ * 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
+
+/*
+ * ceph_file_layout - describe data layout for a file/inode
+ */
+struct ceph_file_layout {
+ /* file -> object mapping */
+ __le32 fl_stripe_unit; /* stripe unit, in bytes. must be multiple
+ of page size. */
+ __le32 fl_stripe_count; /* over this many objects */
+ __le32 fl_object_size; /* until objects are this big, then move to
+ new objects */
+ __le32 fl_cas_hash; /* 0 = none; 1 = sha256 */
+
+ /* pg -> disk layout */
+ __le32 fl_object_stripe_unit; /* for per-object parity, if any */
+
+ /* object -> pg layout */
+ __le32 fl_pg_preferred; /* preferred primary for pg (-1 for none) */
+ __u8 fl_pg_type; /* pg type; see PG_TYPE_* */
+ __u8 fl_pg_size; /* pg size (num replicas, etc.) */
+ __u8 fl_pg_pool; /* implies crush ruleset AND object namespace */
+} __attribute__ ((packed));
+
+#define ceph_file_layout_su(l) ((__s32)le32_to_cpu((l).fl_stripe_unit))
+#define ceph_file_layout_stripe_count(l) \
+ ((__s32)le32_to_cpu((l).fl_stripe_count))
+#define ceph_file_layout_object_size(l) ((__s32)le32_to_cpu((l).fl_object_size))
+#define ceph_file_layout_cas_hash(l) ((__s32)le32_to_cpu((l).fl_cas_hash))
+#define ceph_file_layout_object_su(l) \
+ ((__s32)le32_to_cpu((l).fl_object_stripe_unit))
+#define ceph_file_layout_pg_preferred(l) \
+ ((__s32)le32_to_cpu((l).fl_pg_preferred))
+
+#define ceph_file_layout_stripe_width(l) (le32_to_cpu((l).fl_stripe_unit) * \
+ le32_to_cpu((l).fl_stripe_count))
+
+/* "period" == bytes before i start on a new set of objects */
+#define ceph_file_layout_period(l) (le32_to_cpu((l).fl_object_size) * \
+ le32_to_cpu((l).fl_stripe_count))
+
+/*
+ * placement group.
+ * we encode this into one __le64.
+ */
+#define CEPH_PG_TYPE_REP 1
+#define CEPH_PG_TYPE_RAID4 2
+union ceph_pg {
+ __u64 pg64;
+ struct {
+ __s16 preferred; /* preferred primary osd */
+ __u16 ps; /* placement seed */
+ __u8 __pad;
+ __u8 size;
+ __u8 pool; /* implies crush ruleset */
+ __u8 type;
+ } pg;
+} __attribute__ ((packed));
+
+#define ceph_pg_is_rep(pg) ((pg).pg.type == CEPH_PG_TYPE_REP)
+#define ceph_pg_is_raid4(pg) ((pg).pg.type == CEPH_PG_TYPE_RAID4)
+
+/*
+ * 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;
+} __attribute__ ((packed));
+
+/*
+ * compound epoch+version, used by storage layer to serialize mutations
+ */
+struct ceph_eversion {
+ ceph_epoch_t epoch;
+ __le64 version;
+} __attribute__ ((packed));
+
+/*
+ * osd map bits
+ */
+
+/* status bits */
+#define CEPH_OSD_EXISTS 1
+#define CEPH_OSD_UP 2
+#define CEPH_OSD_CLEAN 4 /* as in, clean shutdown */
+
+/* osd weights. fixed point value: 0x10000 == 1.0 ("in"), 0 == "out" */
+#define CEPH_OSD_IN 0x10000
+#define CEPH_OSD_OUT 0
+
+
+/*
+ * string hash.
+ *
+ * taken from Linux, tho we should probably take care to use this one
+ * in case the upstream hash changes.
+ */
+
+/* Name hashing routines. Initial hash value */
+/* Hash courtesy of the R5 hash in reiserfs modulo sign bits */
+#define ceph_init_name_hash() 0
+
+/* partial hash update function. Assume roughly 4 bits per character */
+static inline unsigned long
+ceph_partial_name_hash(unsigned long c, unsigned long prevhash)
+{
+ return (prevhash + (c << 4) + (c >> 4)) * 11;
+}
+
+/*
+ * Finally: cut down the number of bits to a int value (and try to avoid
+ * losing bits)
+ */
+static inline unsigned long ceph_end_name_hash(unsigned long hash)
+{
+ return (unsigned int) hash;
+}
+
+/* Compute the hash for a name string. */
+static inline unsigned int
+ceph_full_name_hash(const char *name, unsigned int len)
+{
+ unsigned long hash = ceph_init_name_hash();
+ while (len--)
+ hash = ceph_partial_name_hash(*name++, hash);
+ return ceph_end_name_hash(hash);
+}
+
+
+
+/*********************************************
+ * message layer
+ */
+
+/*
+ * entity_name
+ */
+struct ceph_entity_name {
+ __le32 type;
+ __le32 num;
+} __attribute__ ((packed));
+
+#define CEPH_ENTITY_TYPE_MON 1
+#define CEPH_ENTITY_TYPE_MDS 2
+#define CEPH_ENTITY_TYPE_OSD 3
+#define CEPH_ENTITY_TYPE_CLIENT 4
+#define CEPH_ENTITY_TYPE_ADMIN 5
+
+/* used by message exchange protocol */
+#define CEPH_MSGR_TAG_READY 1 /* server->client: ready for messages */
+#define CEPH_MSGR_TAG_RESETSESSION 2 /* server->client: reset, try again */
+#define CEPH_MSGR_TAG_WAIT 3 /* server->client: wait for racing
+ incoming connection */
+#define CEPH_MSGR_TAG_RETRY_SESSION 4 /* server->client + cseq: try again
+ with higher cseq */
+#define CEPH_MSGR_TAG_RETRY_GLOBAL 5 /* server->client + gseq: try again
+ with higher gseq */
+#define CEPH_MSGR_TAG_CLOSE 6 /* closing pipe */
+#define CEPH_MSGR_TAG_MSG 10 /* message */
+#define CEPH_MSGR_TAG_ACK 11 /* message ack */
+
+
+/*
+ * entity_addr -- network address
+ */
+struct ceph_entity_addr {
+ __le32 erank; /* entity's rank in process */
+ __le32 nonce; /* unique id for process (e.g. pid) */
+ struct sockaddr_in ipaddr;
+} __attribute__ ((packed));
+
+static inline bool ceph_entity_addr_is_local(const struct ceph_entity_addr *a,
+ const struct ceph_entity_addr *b)
+{
+ return le32_to_cpu(a->nonce) == le32_to_cpu(b->nonce) &&
+ a->ipaddr.sin_addr.s_addr == b->ipaddr.sin_addr.s_addr;
+}
+
+static inline bool ceph_entity_addr_equal(const struct ceph_entity_addr *a,
+ const struct ceph_entity_addr *b)
+{
+ return memcmp(a, b, sizeof(*a)) == 0;
+}
+
+struct ceph_entity_inst {
+ struct ceph_entity_name name;
+ struct ceph_entity_addr addr;
+} __attribute__ ((packed));
+
+
+/*
+ * connection negotiation
+ */
+struct ceph_msg_connect {
+ __le32 host_type; /* CEPH_ENTITY_TYPE_* */
+ __le32 global_seq;
+ __le32 connect_seq;
+ __u8 flags;
+} __attribute__ ((packed));
+
+struct ceph_msg_connect_reply {
+ __u8 tag;
+ __le32 global_seq;
+ __le32 connect_seq;
+ __u8 flags;
+} __attribute__ ((packed));
+
+#define CEPH_MSG_CONNECT_LOSSY 1 /* messages i send may be safely dropped */
+
+
+/*
+ * message header
+ */
+struct ceph_msg_header {
+ __le64 seq; /* message seq# for this session */
+ __le16 type; /* message type */
+ __le16 priority; /* priority. higher value == higher priority */
+ __le16 mon_protocol, osd_protocol, mds_protocol,
+ client_protocol; /* protocol versions */
+ __le32 front_len; /* bytes in main payload */
+ __le32 data_off; /* sender: include full offset;
+ receiver: mask against ~PAGE_MASK */
+ __le32 data_len; /* bytes of data payload */
+ struct ceph_entity_inst src, orig_src, dst;
+ __le32 crc; /* header crc32c */
+} __attribute__ ((packed));
+
+#define CEPH_MSG_PRIO_LOW 64
+#define CEPH_MSG_PRIO_DEFAULT 127
+#define CEPH_MSG_PRIO_HIGH 196
+#define CEPH_MSG_PRIO_HIGHEST 255
+
+/*
+ * follows data payload
+ */
+struct ceph_msg_footer {
+ __le32 flags;
+ __le32 front_crc;
+ __le32 data_crc;
+} __attribute__ ((packed));
+
+#define CEPH_MSG_FOOTER_ABORTED (1<<0) /* drop this message */
+#define CEPH_MSG_FOOTER_NOCRC (1<<1) /* no data crc */
+
+
+/*
+ * message types
+ */
+
+/* misc */
+#define CEPH_MSG_SHUTDOWN 1
+#define CEPH_MSG_PING 2
+
+/* client <-> monitor */
+#define CEPH_MSG_MON_MAP 4
+#define CEPH_MSG_MON_GET_MAP 5
+#define CEPH_MSG_CLIENT_MOUNT 10
+#define CEPH_MSG_CLIENT_UNMOUNT 11
+#define CEPH_MSG_STATFS 12
+#define CEPH_MSG_STATFS_REPLY 13
+
+/* client <-> mds */
+#define CEPH_MSG_MDS_GETMAP 20
+#define CEPH_MSG_MDS_MAP 21
+
+#define CEPH_MSG_CLIENT_SESSION 22
+#define CEPH_MSG_CLIENT_RECONNECT 23
+
+#define CEPH_MSG_CLIENT_REQUEST 24
+#define CEPH_MSG_CLIENT_REQUEST_FORWARD 25
+#define CEPH_MSG_CLIENT_REPLY 26
+#define CEPH_MSG_CLIENT_CAPS 0x310
+#define CEPH_MSG_CLIENT_LEASE 0x311
+#define CEPH_MSG_CLIENT_SNAP 0x312
+
+/* osd */
+#define CEPH_MSG_OSD_GETMAP 40
+#define CEPH_MSG_OSD_MAP 41
+#define CEPH_MSG_OSD_OP 42
+#define CEPH_MSG_OSD_OPREPLY 43
+
+
+struct ceph_mon_statfs {
+ struct ceph_fsid fsid;
+ __le64 tid;
+};
+
+struct ceph_statfs {
+ __le64 f_total;
+ __le64 f_free; /* used = total - free (KB) */
+ __le64 f_avail; /* usable */
+ __le64 f_objects;
+};
+
+struct ceph_mon_statfs_reply {
+ struct ceph_fsid fsid;
+ __le64 tid;
+ struct ceph_statfs st;
+};
+
+struct ceph_osd_getmap {
+ struct ceph_fsid fsid;
+ __le32 start;
+} __attribute__ ((packed));
+
+struct ceph_mds_getmap {
+ struct ceph_fsid fsid;
+ __le32 want;
+} __attribute__ ((packed));
+
+
+/*
+ * mds states
+ * > 0 -> in
+ * <= 0 -> out
+ */
+#define CEPH_MDS_STATE_DNE 0 /* down, does not exist. */
+#define CEPH_MDS_STATE_STOPPED -1 /* down, once existed, but no subtrees.
+ empty log. */
+#define CEPH_MDS_STATE_DESTROYING -2 /* down, existing, semi-destroyed. */
+#define CEPH_MDS_STATE_FAILED 3 /* down, needs to be recovered. */
+
+#define CEPH_MDS_STATE_BOOT -4 /* up, boot announcement. */
+#define CEPH_MDS_STATE_STANDBY -5 /* up, idle. waiting for assignment. */
+#define CEPH_MDS_STATE_CREATING -6 /* up, creating MDS instance. */
+#define CEPH_MDS_STATE_STARTING -7 /* up, starting previously stopped mds. */
+
+#define CEPH_MDS_STATE_REPLAY 8 /* up, replaying journal. */
+#define CEPH_MDS_STATE_RESOLVE 9 /* up, disambiguating distributed
+ operations (import, rename, etc.) */
+#define CEPH_MDS_STATE_RECONNECT 10 /* up, reconnect to clients */
+#define CEPH_MDS_STATE_REJOIN 11 /* up, rejoining distributed cache */
+#define CEPH_MDS_STATE_ACTIVE 12 /* up, active */
+#define CEPH_MDS_STATE_STOPPING 13 /* up, but exporting metadata */
+
+
+/*
+ * metadata lock types.
+ * - these are bitmasks.. we can compose them
+ * - they also define the lock ordering by the MDS
+ * - a few of these are internal to the mds
+ */
+#define CEPH_LOCK_DN 1
+#define CEPH_LOCK_ISNAP 2
+#define CEPH_LOCK_IVERSION 4 /* mds internal */
+#define CEPH_LOCK_IFILE 8 /* mds internal */
+#define CEPH_LOCK_IDIR 16 /* mds internal */
+#define CEPH_LOCK_IAUTH 32
+#define CEPH_LOCK_ILINK 64
+#define CEPH_LOCK_IDFT 128 /* dir frag tree */
+#define CEPH_LOCK_INEST 256 /* mds internal */
+#define CEPH_LOCK_IXATTR 512
+#define CEPH_LOCK_INO 2048 /* immutable inode bits; not a lock */
+
+/* alias for either filelock or dirlock */
+#define CEPH_LOCK_ICONTENT (CEPH_LOCK_IFILE|CEPH_LOCK_IDIR)
+
+/*
+ * stat masks are defined in terms of the locks that cover inode fields.
+ */
+#define CEPH_STAT_MASK_INODE CEPH_LOCK_INO
+#define CEPH_STAT_MASK_TYPE CEPH_LOCK_INO /* mode >> 12 */
+#define CEPH_STAT_MASK_SYMLINK CEPH_LOCK_INO
+#define CEPH_STAT_MASK_UID CEPH_LOCK_IAUTH
+#define CEPH_STAT_MASK_GID CEPH_LOCK_IAUTH
+#define CEPH_STAT_MASK_MODE CEPH_LOCK_IAUTH
+#define CEPH_STAT_MASK_NLINK CEPH_LOCK_ILINK
+#define CEPH_STAT_MASK_LAYOUT CEPH_LOCK_ICONTENT
+#define CEPH_STAT_MASK_MTIME CEPH_LOCK_ICONTENT
+#define CEPH_STAT_MASK_SIZE CEPH_LOCK_ICONTENT
+#define CEPH_STAT_MASK_ATIME CEPH_LOCK_ICONTENT /* fixme */
+#define CEPH_STAT_MASK_XATTR CEPH_LOCK_IXATTR
+#define CEPH_STAT_MASK_INODE_ALL (CEPH_LOCK_ICONTENT | CEPH_LOCK_IAUTH | \
+ CEPH_LOCK_ILINK | CEPH_LOCK_INO)
+
+/* client_session ops */
+enum {
+ CEPH_SESSION_REQUEST_OPEN,
+ CEPH_SESSION_OPEN,
+ CEPH_SESSION_REQUEST_CLOSE,
+ CEPH_SESSION_CLOSE,
+ CEPH_SESSION_REQUEST_RENEWCAPS,
+ CEPH_SESSION_RENEWCAPS,
+ CEPH_SESSION_STALE,
+};
+
+static inline const char *ceph_session_op_name(int op)
+{
+ switch (op) {
+ case CEPH_SESSION_REQUEST_OPEN: return "request_open";
+ case CEPH_SESSION_OPEN: return "open";
+ case CEPH_SESSION_REQUEST_CLOSE: return "request_close";
+ case CEPH_SESSION_CLOSE: return "close";
+ case CEPH_SESSION_REQUEST_RENEWCAPS: return "request_renewcaps";
+ case CEPH_SESSION_RENEWCAPS: return "renewcaps";
+ case CEPH_SESSION_STALE: return "stale";
+ default: return "???";
+ }
+}
+
+struct ceph_mds_session_head {
+ __le32 op;
+ __le64 seq;
+ struct ceph_timespec stamp;
+} __attribute__ ((packed));
+
+/* client_request */
+/*
+ * metadata ops.
+ * & 0x001000 -> write op
+ * & 0x010000 -> follow symlink (e.g. stat(), not lstat()).
+ & & 0x100000 -> use weird ino/path trace
+ */
+#define CEPH_MDS_OP_WRITE 0x001000
+#define CEPH_MDS_OP_FOLLOW_LINK 0x010000
+#define CEPH_MDS_OP_INO_PATH 0x100000
+enum {
+ CEPH_MDS_OP_FINDINODE = 0x100100,
+
+ CEPH_MDS_OP_LSTAT = 0x00100,
+ CEPH_MDS_OP_LUTIME = 0x01101,
+ CEPH_MDS_OP_LCHMOD = 0x01102,
+ CEPH_MDS_OP_LCHOWN = 0x01103,
+ CEPH_MDS_OP_LSETXATTR = 0x01104,
+ CEPH_MDS_OP_LRMXATTR = 0x01105,
+ CEPH_MDS_OP_LSETLAYOUT = 0x01106,
+
+ CEPH_MDS_OP_STAT = 0x10100,
+ CEPH_MDS_OP_UTIME = 0x11101,
+ CEPH_MDS_OP_CHMOD = 0x11102,
+ CEPH_MDS_OP_CHOWN = 0x11103,
+ CEPH_MDS_OP_SETXATTR = 0x11104,
+ CEPH_MDS_OP_RMXATTR = 0x11105,
+
+ CEPH_MDS_OP_MKNOD = 0x01201,
+ CEPH_MDS_OP_LINK = 0x01202,
+ CEPH_MDS_OP_UNLINK = 0x01203,
+ CEPH_MDS_OP_RENAME = 0x01204,
+ CEPH_MDS_OP_MKDIR = 0x01220,
+ CEPH_MDS_OP_RMDIR = 0x01221,
+ CEPH_MDS_OP_SYMLINK = 0x01222,
+
+ CEPH_MDS_OP_OPEN = 0x10302,
+ CEPH_MDS_OP_TRUNCATE = 0x11303,
+ CEPH_MDS_OP_LTRUNCATE = 0x01303,
+ CEPH_MDS_OP_FSYNC = 0x00304,
+ CEPH_MDS_OP_READDIR = 0x00305,
+
+ CEPH_MDS_OP_MKSNAP = 0x01400,
+ CEPH_MDS_OP_RMSNAP = 0x01401,
+ CEPH_MDS_OP_LSSNAP = 0x00402,
+};
+
+static inline const char *ceph_mds_op_name(int op)
+{
+ switch (op) {
+ case CEPH_MDS_OP_FINDINODE: return "findinode";
+ case CEPH_MDS_OP_STAT: return "stat";
+ case CEPH_MDS_OP_LSTAT: return "lstat";
+ case CEPH_MDS_OP_UTIME: return "utime";
+ case CEPH_MDS_OP_LUTIME: return "lutime";
+ case CEPH_MDS_OP_CHMOD: return "chmod";
+ case CEPH_MDS_OP_LCHMOD: return "lchmod";
+ case CEPH_MDS_OP_CHOWN: return "chown";
+ case CEPH_MDS_OP_LCHOWN: return "lchown";
+ case CEPH_MDS_OP_LSETLAYOUT: return "lsetlayout";
+ case CEPH_MDS_OP_SETXATTR: return "setxattr";
+ case CEPH_MDS_OP_LSETXATTR: return "lsetxattr";
+ case CEPH_MDS_OP_RMXATTR: return "rmxattr";
+ case CEPH_MDS_OP_LRMXATTR: return "lrmxattr";
+ case CEPH_MDS_OP_READDIR: return "readdir";
+ case CEPH_MDS_OP_MKNOD: return "mknod";
+ case CEPH_MDS_OP_LINK: return "link";
+ case CEPH_MDS_OP_UNLINK: return "unlink";
+ case CEPH_MDS_OP_RENAME: return "rename";
+ case CEPH_MDS_OP_MKDIR: return "mkdir";
+ case CEPH_MDS_OP_RMDIR: return "rmdir";
+ case CEPH_MDS_OP_SYMLINK: return "symlink";
+ case CEPH_MDS_OP_OPEN: return "open";
+ case CEPH_MDS_OP_TRUNCATE: return "truncate";
+ case CEPH_MDS_OP_LTRUNCATE: return "ltruncate";
+ case CEPH_MDS_OP_FSYNC: return "fsync";
+ case CEPH_MDS_OP_LSSNAP: return "lssnap";
+ case CEPH_MDS_OP_MKSNAP: return "mksnap";
+ case CEPH_MDS_OP_RMSNAP: return "rmsnap";
+ default: return "???";
+ }
+}
+
+struct ceph_mds_request_head {
+ ceph_tid_t tid, oldest_client_tid;
+ ceph_epoch_t mdsmap_epoch; /* on client */
+ __le32 num_fwd;
+ __le32 retry_attempt;
+ __le64 mds_wants_replica_in_dirino;
+ __le32 op;
+ __le32 caller_uid, caller_gid;
+
+ union {
+ struct {
+ __le32 mask;
+ } __attribute__ ((packed)) stat;
+ struct {
+ __le32 mask;
+ } __attribute__ ((packed)) fstat;
+ struct {
+ __le32 frag;
+ } __attribute__ ((packed)) readdir;
+ struct {
+ struct ceph_timespec mtime;
+ struct ceph_timespec atime;
+ struct ceph_timespec ctime;
+ __le32 mask;
+ } __attribute__ ((packed)) utime;
+ struct {
+ __le32 mode;
+ } __attribute__ ((packed)) chmod;
+ struct {
+ __le32 uid;
+ __le32 gid;
+ __le32 mask;
+ } __attribute__ ((packed)) chown;
+ struct {
+ __le32 mode;
+ __le32 rdev;
+ } __attribute__ ((packed)) mknod;
+ struct {
+ __le32 mode;
+ } __attribute__ ((packed)) mkdir;
+ struct {
+ __le32 flags;
+ __le32 mode;
+ } __attribute__ ((packed)) open;
+ struct {
+ __le64 length;
+ } __attribute__ ((packed)) truncate;
+ struct {
+ __le32 flags;
+ } __attribute__ ((packed)) setxattr;
+ struct {
+ struct ceph_file_layout layout;
+ } __attribute__ ((packed)) setlayout;
+ } __attribute__ ((packed)) args;
+} __attribute__ ((packed));
+
+/* masks for utimes() */
+#define CEPH_UTIME_ATIME 1
+#define CEPH_UTIME_MTIME 2
+#define CEPH_UTIME_CTIME 4
+
+/* masks for chown */
+#define CEPH_CHOWN_UID 1
+#define CEPH_CHOWN_GID 2
+
+struct ceph_inopath_item {
+ __le64 ino;
+ __le32 dname_hash;
+} __attribute__ ((packed));
+
+/* client reply */
+struct ceph_mds_reply_head {
+ ceph_tid_t tid;
+ __le32 op;
+ __le32 result;
+ __le32 file_caps;
+ __le32 file_caps_seq;
+ __le32 file_caps_mseq;
+ __le32 mdsmap_epoch;
+} __attribute__ ((packed));
+
+/* one for each node split */
+struct ceph_frag_tree_split {
+ __le32 frag; /* this frag splits... */
+ __le32 by; /* ...by this many bits */
+} __attribute__ ((packed));
+
+struct ceph_frag_tree_head {
+ __le32 nsplits;
+ struct ceph_frag_tree_split splits[];
+} __attribute__ ((packed));
+
+struct ceph_mds_reply_inode {
+ __le64 ino;
+ __le64 snapid;
+ __le64 version;
+ struct ceph_file_layout layout;
+ struct ceph_timespec ctime, mtime, atime;
+ __le64 time_warp_seq;
+ __le32 rdev;
+ __le32 mode, uid, gid;
+ __le32 nlink;
+ __le64 size, max_size, truncate_seq;
+ __le64 files, subdirs, rbytes, rfiles, rsubdirs; /* dir stats */
+ struct ceph_timespec rctime;
+ struct ceph_frag_tree_head fragtree;
+} __attribute__ ((packed));
+/* followed by frag array, then symlink string, then xattr blob */
+
+/* reply_lease follows dname, and reply_inode */
+struct ceph_mds_reply_lease {
+ __le16 mask;
+ __le32 duration_ms;
+} __attribute__ ((packed));
+
+struct ceph_mds_reply_dirfrag {
+ __le32 frag; /* fragment */
+ __le32 auth; /* auth mds, if this is a delegation point */
+ __le32 ndist; /* number of mds' this is replicated on */
+ __le32 dist[];
+} __attribute__ ((packed));
+
+/* file access modes */
+#define CEPH_FILE_MODE_PIN 0
+#define CEPH_FILE_MODE_RD 1
+#define CEPH_FILE_MODE_WR 2
+#define CEPH_FILE_MODE_RDWR 3 /* RD | WR */
+#define CEPH_FILE_MODE_LAZY 4 /* lazy io */
+#define CEPH_FILE_MODE_NUM 8 /* bc these are bit fields.. mostly */
+
+static inline int ceph_flags_to_mode(int flags)
+{
+#ifdef O_DIRECTORY /* fixme */
+ if ((flags & O_DIRECTORY) == O_DIRECTORY)
+ return CEPH_FILE_MODE_PIN;
+#endif
+#ifdef O_LAZY
+ if (flags & O_LAZY)
+ return CEPH_FILE_MODE_LAZY;
+#endif
+ if ((flags & O_APPEND) == O_APPEND)
+ flags |= O_WRONLY;
+
+ flags &= O_ACCMODE;
+ if ((flags & O_RDWR) == O_RDWR)
+ return CEPH_FILE_MODE_RDWR;
+ if ((flags & O_WRONLY) == O_WRONLY)
+ return CEPH_FILE_MODE_WR;
+ return CEPH_FILE_MODE_RD;
+}
+
+/* client file caps */
+#define CEPH_CAP_PIN 1 /* no specific capabilities beyond the pin */
+#define CEPH_CAP_RDCACHE 2 /* client can cache reads */
+#define CEPH_CAP_RD 4 /* client can read */
+#define CEPH_CAP_WR 8 /* client can write */
+#define CEPH_CAP_WRBUFFER 16 /* client can buffer writes */
+#define CEPH_CAP_WREXTEND 32 /* client can extend EOF */
+#define CEPH_CAP_LAZYIO 64 /* client can perform lazy io */
+#define CEPH_CAP_EXCL 128 /* exclusive/loner access */
+
+static inline int ceph_caps_for_mode(int mode)
+{
+ switch (mode) {
+ case CEPH_FILE_MODE_PIN:
+ return CEPH_CAP_PIN;
+ case CEPH_FILE_MODE_RD:
+ return CEPH_CAP_PIN |
+ CEPH_CAP_RD | CEPH_CAP_RDCACHE;
+ case CEPH_FILE_MODE_RDWR:
+ return CEPH_CAP_PIN |
+ CEPH_CAP_RD | CEPH_CAP_RDCACHE |
+ CEPH_CAP_WR | CEPH_CAP_WRBUFFER |
+ CEPH_CAP_EXCL;
+ case CEPH_FILE_MODE_WR:
+ return CEPH_CAP_PIN |
+ CEPH_CAP_WR | CEPH_CAP_WRBUFFER |
+ CEPH_CAP_EXCL;
+ }
+ return 0;
+}
+
+enum {
+ CEPH_CAP_OP_GRANT, /* mds->client grant */
+ CEPH_CAP_OP_TRUNC, /* mds->client trunc notify */
+ CEPH_CAP_OP_EXPORT, /* mds has exported the cap */
+ CEPH_CAP_OP_IMPORT, /* mds has imported the cap from specified mds */
+ CEPH_CAP_OP_RELEASED, /* mds->client close out cap */
+ CEPH_CAP_OP_FLUSHEDSNAP, /* mds->client flushed snap */
+ CEPH_CAP_OP_ACK, /* client->mds ack (if prior grant was recall) */
+ CEPH_CAP_OP_REQUEST, /* client->mds request (update wanted bits) */
+ CEPH_CAP_OP_FLUSHSNAP, /* client->mds flush snapped metadata */
+ CEPH_CAP_OP_RELEASE, /* client->mds request release cap */
+};
+
+static inline const char *ceph_cap_op_name(int op)
+{
+ switch (op) {
+ case CEPH_CAP_OP_GRANT: return "grant";
+ case CEPH_CAP_OP_TRUNC: return "trunc";
+ case CEPH_CAP_OP_EXPORT: return "export";
+ case CEPH_CAP_OP_IMPORT: return "import";
+ case CEPH_CAP_OP_RELEASED: return "released";
+ case CEPH_CAP_OP_FLUSHEDSNAP: return "flushedsnap";
+ case CEPH_CAP_OP_ACK: return "ack";
+ case CEPH_CAP_OP_REQUEST: return "request";
+ case CEPH_CAP_OP_FLUSHSNAP: return "flushsnap";
+ case CEPH_CAP_OP_RELEASE: return "release";
+ default: return "???";
+ }
+}
+
+/*
+ * caps message, used for capability callbacks, acks, requests, etc.
+ */
+struct ceph_mds_caps {
+ __le32 op;
+ __le64 ino;
+ __le32 seq;
+ __le32 caps, wanted;
+ __le64 size, max_size;
+ __le64 truncate_seq;
+ __le32 migrate_seq;
+ struct ceph_timespec mtime, atime, ctime;
+ struct ceph_file_layout layout;
+ __le64 time_warp_seq;
+ __le64 snap_follows;
+ __le32 snap_trace_len;
+} __attribute__ ((packed));
+
+
+#define CEPH_MDS_LEASE_REVOKE 1 /* mds -> client */
+#define CEPH_MDS_LEASE_RELEASE 2 /* client -> mds */
+#define CEPH_MDS_LEASE_RENEW 3 /* client <-> mds */
+
+struct ceph_mds_lease {
+ __u8 action;
+ __le16 mask;
+ __le64 ino;
+ __le64 first, last;
+} __attribute__ ((packed));
+/* followed by a __le32+string for dname */
+
+
+/* client reconnect */
+struct ceph_mds_cap_reconnect {
+ __le32 wanted;
+ __le32 issued;
+ __le64 size;
+ struct ceph_timespec mtime, atime;
+ __le64 snaprealm;
+} __attribute__ ((packed));
+/* followed by encoded string */
+
+struct ceph_mds_snaprealm_reconnect {
+ __le64 ino;
+ __le64 seq;
+ __le64 parent; /* parent realm */
+} __attribute__ ((packed));
+
+/*
+ * snaps
+ */
+enum {
+ CEPH_SNAP_OP_UPDATE, /* CREATE or DESTROY */
+ CEPH_SNAP_OP_CREATE,
+ CEPH_SNAP_OP_DESTROY,
+ CEPH_SNAP_OP_SPLIT,
+};
+
+static inline const char *ceph_snap_op_name(int o)
+{
+ switch (o) {
+ case CEPH_SNAP_OP_UPDATE: return "update";
+ case CEPH_SNAP_OP_CREATE: return "create";
+ case CEPH_SNAP_OP_DESTROY: return "destroy";
+ case CEPH_SNAP_OP_SPLIT: return "split";
+ default: return "???";
+ }
+}
+
+struct ceph_mds_snap_head {
+ __le32 op;
+ __le64 split;
+ __le32 num_split_inos;
+ __le32 num_split_realms;
+ __le32 trace_len;
+} __attribute__ ((packed));
+/* followed by split ino list, then split realms, then the trace blob */
+
+/*
+ * encode info about a snaprealm, as viewed by a client
+ */
+struct ceph_mds_snap_realm {
+ __le64 ino; /* ino */
+ __le64 created; /* snap: when created */
+ __le64 parent; /* ino: parent realm */
+ __le64 parent_since; /* snap: same parent since */
+ __le64 seq; /* snap: version */
+ __le32 num_snaps;
+ __le32 num_prior_parent_snaps;
+} __attribute__ ((packed));
+/* followed by my snap list, then prior parent snap list */
+
+/*
+ * osd map flag bits
+ */
+#define CEPH_OSDMAP_NEARFULL (1<<0) /* sync writes (near ENOSPC) */
+#define CEPH_OSDMAP_FULL (1<<1) /* no data writes (ENOSPC) */
+
+/*
+ * 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_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
+
+enum {
+ /* 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_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,
+
+ /* 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,
+
+ /* object data */
+ 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,
+
+ /* object attrs */
+ 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,
+
+ /* 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,
+
+ /* fancy read */
+ CEPH_OSD_OP_GREP = CEPH_OSD_OP_MODE_RD | CEPH_OSD_OP_TYPE_DATA | 3,
+
+ /* fancy write */
+ CEPH_OSD_OP_APPEND = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_DATA | 6,
+};
+
+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_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;
+}
+
+static inline const char *ceph_osd_op_name(int op)
+{
+ switch (op) {
+ case CEPH_OSD_OP_READ: return "read";
+ case CEPH_OSD_OP_STAT: return "stat";
+
+ case CEPH_OSD_OP_WRITE: return "write";
+ case CEPH_OSD_OP_DELETE: return "delete";
+ case CEPH_OSD_OP_TRUNCATE: return "truncate";
+ case CEPH_OSD_OP_ZERO: return "zero";
+ case CEPH_OSD_OP_WRITEFULL: return "writefull";
+
+ case CEPH_OSD_OP_SETXATTR: return "setxattr";
+ case CEPH_OSD_OP_SETXATTRS: return "setxattrs";
+ case CEPH_OSD_OP_RESETXATTRS: return "resetxattrs";
+ case CEPH_OSD_OP_RMXATTR: return "rmxattr";
+
+ case CEPH_OSD_OP_WRLOCK: return "wrlock";
+ case CEPH_OSD_OP_WRUNLOCK: return "wrunlock";
+ case CEPH_OSD_OP_RDLOCK: return "rdlock";
+ case CEPH_OSD_OP_RDUNLOCK: return "rdunlock";
+ case CEPH_OSD_OP_UPLOCK: return "uplock";
+ case CEPH_OSD_OP_DNLOCK: return "dnlock";
+
+ case CEPH_OSD_OP_PULL: return "pull";
+ case CEPH_OSD_OP_PUSH: return "push";
+ case CEPH_OSD_OP_BALANCEREADS: return "balance-reads";
+ case CEPH_OSD_OP_UNBALANCEREADS: return "unbalance-reads";
+
+ default: return "???";
+ }
+}
+
+
+/*
+ * osd op flags
+ */
+enum {
+ CEPH_OSD_OP_ACK = 1, /* want (or is) "ack" ack */
+ CEPH_OSD_OP_SAFE = 2, /* want (or is) "safe" ack */
+ CEPH_OSD_OP_RETRY = 4, /* resend attempt */
+ CEPH_OSD_OP_INCLOCK_FAIL = 8, /* fail on inclock collision */
+ CEPH_OSD_OP_MODIFY = 16, /* op is/was a mutation */
+ CEPH_OSD_OP_ACKNVRAM = 32, /* ACK when stable in NVRAM, not RAM */
+ CEPH_OSD_OP_ORDERSNAP = 64, /* EOLDSNAP if snapc is out of order */
+ CEPH_OSD_OP_PEERSTAT = 128, /* msg includes osd_peer_stat */
+ CEPH_OSD_OP_BALANCE_READS = 256,
+};
+
+#define EOLDSNAPC 44 /* ORDERSNAP flag set and writer has old snap context*/
+
+struct ceph_osd_op {
+ __le16 op;
+ union {
+ struct {
+ __le64 offset, length;
+ };
+ struct {
+ __le32 name_len;
+ __le32 value_len;
+ };
+ };
+} __attribute__ ((packed));
+
+struct ceph_osd_request_head {
+ ceph_tid_t tid;
+ __le32 client_inc;
+ struct ceph_object oid;
+ struct ceph_object_layout layout;
+ ceph_epoch_t osdmap_epoch;
+
+ __le32 flags;
+ __le32 inc_lock;
+
+ struct ceph_eversion reassert_version;
+
+ /* writer's snap context */
+ __le64 snap_seq;
+ __le32 num_snaps;
+
+ /* read or mutation */
+ __le16 num_ops;
+ __u16 object_type;
+ struct ceph_osd_op ops[]; /* followed by snaps */
+} __attribute__ ((packed));
+
+struct ceph_osd_reply_head {
+ ceph_tid_t tid;
+ __le32 flags;
+ struct ceph_object oid;
+ struct ceph_object_layout layout;
+ ceph_epoch_t osdmap_epoch;
+ struct ceph_eversion reassert_version;
+
+ __le32 result;
+
+ __le32 num_ops;
+ struct ceph_osd_op ops[0];
+} __attribute__ ((packed));
+
+#endif
--
1.5.6.5
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