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+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#include <map>
+
+#include "include/int_types.h"
+#include "include/buffer.h"
+#include "osd/osd_types.h"
+
+/*********************************
+ * transaction
+ *
+ * A Transaction represents a sequence of primitive mutation
+ * operations.
+ *
+ * Three events in the life of a Transaction result in
+ * callbacks. Any Transaction can contain any number of callback
+ * objects (Context) for any combination of the three classes of
+ * callbacks:
+ *
+ * on_applied_sync, on_applied, and on_commit.
+ *
+ * The "on_applied" and "on_applied_sync" callbacks are invoked when
+ * the modifications requested by the Transaction are visible to
+ * subsequent ObjectStore operations, i.e., the results are
+ * readable. The only conceptual difference between on_applied and
+ * on_applied_sync is the specific thread and locking environment in
+ * which the callbacks operate. "on_applied_sync" is called
+ * directly by an ObjectStore execution thread. It is expected to
+ * execute quickly and must not acquire any locks of the calling
+ * environment. Conversely, "on_applied" is called from the separate
+ * Finisher thread, meaning that it can contend for calling
+ * environment locks. NB, on_applied and on_applied_sync are
+ * sometimes called on_readable and on_readable_sync.
+ *
+ * The "on_commit" callback is also called from the Finisher thread
+ * and indicates that all of the mutations have been durably
+ * committed to stable storage (i.e., are now software/hardware
+ * crashproof).
+ *
+ * At the implementation level, each mutation primitive (and its
+ * associated data) can be serialized to a single buffer. That
+ * serialization, however, does not copy any data, but (using the
+ * bufferlist library) will reference the original buffers. This
+ * implies that the buffer that contains the data being submitted
+ * must remain stable until the on_commit callback completes. In
+ * practice, bufferlist handles all of this for you and this
+ * subtlety is only relevant if you are referencing an existing
+ * buffer via buffer::raw_static.
+ *
+ * Some implementations of ObjectStore choose to implement their own
+ * form of journaling that uses the serialized form of a
+ * Transaction. This requires that the encode/decode logic properly
+ * version itself and handle version upgrades that might change the
+ * format of the encoded Transaction. This has already happened a
+ * couple of times and the Transaction object contains some helper
+ * variables that aid in this legacy decoding:
+ *
+ * sobject_encoding detects an older/simpler version of oid
+ * present in pre-bobtail versions of ceph. use_pool_override
+ * also detects a situation where the pool of an oid can be
+ * overridden for legacy operations/buffers. For non-legacy
+ * implementations of ObjectStore, neither of these fields are
+ * relevant.
+ *
+ *
+ * TRANSACTION ISOLATION
+ *
+ * Except as noted above, isolation is the responsibility of the
+ * caller. In other words, if any storage element (storage element
+ * == any of the four portions of an object as described above) is
+ * altered by a transaction (including deletion), the caller
+ * promises not to attempt to read that element while the
+ * transaction is pending (here pending means from the time of
+ * issuance until the "on_applied_sync" callback has been
+ * received). Violations of isolation need not be detected by
+ * ObjectStore and there is no corresponding error mechanism for
+ * reporting an isolation violation (crashing would be the
+ * appropriate way to report an isolation violation if detected).
+ *
+ * Enumeration operations may violate transaction isolation as
+ * described above when a storage element is being created or
+ * deleted as part of a transaction. In this case, ObjectStore is
+ * allowed to consider the enumeration operation to either precede
+ * or follow the violating transaction element. In other words, the
+ * presence/absence of the mutated element in the enumeration is
+ * entirely at the discretion of ObjectStore. The arbitrary ordering
+ * applies independently to each transaction element. For example,
+ * if a transaction contains two mutating elements "create A" and
+ * "delete B". And an enumeration operation is performed while this
+ * transaction is pending. It is permissible for ObjectStore to
+ * report any of the four possible combinations of the existence of
+ * A and B.
+ *
+ */
+namespace ceph::os {
+class Transaction {
+public:
+ enum {
+ OP_NOP = 0,
+ OP_TOUCH = 9, // cid, oid
+ OP_WRITE = 10, // cid, oid, offset, len, bl
+ OP_ZERO = 11, // cid, oid, offset, len
+ OP_TRUNCATE = 12, // cid, oid, len
+ OP_REMOVE = 13, // cid, oid
+ OP_SETATTR = 14, // cid, oid, attrname, bl
+ OP_SETATTRS = 15, // cid, oid, attrset
+ OP_RMATTR = 16, // cid, oid, attrname
+ OP_CLONE = 17, // cid, oid, newoid
+ OP_CLONERANGE = 18, // cid, oid, newoid, offset, len
+ OP_CLONERANGE2 = 30, // cid, oid, newoid, srcoff, len, dstoff
+
+ OP_TRIMCACHE = 19, // cid, oid, offset, len **DEPRECATED**
+
+ OP_MKCOLL = 20, // cid
+ OP_RMCOLL = 21, // cid
+ OP_COLL_ADD = 22, // cid, oldcid, oid
+ OP_COLL_REMOVE = 23, // cid, oid
+ OP_COLL_SETATTR = 24, // cid, attrname, bl
+ OP_COLL_RMATTR = 25, // cid, attrname
+ OP_COLL_SETATTRS = 26, // cid, attrset
+ OP_COLL_MOVE = 8, // newcid, oldcid, oid
+
+ OP_RMATTRS = 28, // cid, oid
+ OP_COLL_RENAME = 29, // cid, newcid
+
+ OP_OMAP_CLEAR = 31, // cid
+ OP_OMAP_SETKEYS = 32, // cid, attrset
+ OP_OMAP_RMKEYS = 33, // cid, keyset
+ OP_OMAP_SETHEADER = 34, // cid, header
+ OP_SPLIT_COLLECTION = 35, // cid, bits, destination
+ OP_SPLIT_COLLECTION2 = 36, /* cid, bits, destination
+ doesn't create the destination */
+ OP_OMAP_RMKEYRANGE = 37, // cid, oid, firstkey, lastkey
+ OP_COLL_MOVE_RENAME = 38, // oldcid, oldoid, newcid, newoid
+ OP_SETALLOCHINT = 39, // cid, oid, object_size, write_size
+ OP_COLL_HINT = 40, // cid, type, bl
+
+ OP_TRY_RENAME = 41, // oldcid, oldoid, newoid
+
+ OP_COLL_SET_BITS = 42, // cid, bits
+
+ OP_MERGE_COLLECTION = 43, // cid, destination
+ };
+
+ // Transaction hint type
+ enum {
+ COLL_HINT_EXPECTED_NUM_OBJECTS = 1,
+ };
+
+ struct Op {
+ ceph_le32 op;
+ ceph_le32 cid;
+ ceph_le32 oid;
+ ceph_le64 off;
+ ceph_le64 len;
+ ceph_le32 dest_cid;
+ ceph_le32 dest_oid; //OP_CLONE, OP_CLONERANGE
+ ceph_le64 dest_off; //OP_CLONERANGE
+ union {
+ struct {
+ ceph_le32 hint_type; //OP_COLL_HINT
+ };
+ struct {
+ ceph_le32 alloc_hint_flags; //OP_SETALLOCHINT
+ };
+ };
+ ceph_le64 expected_object_size; //OP_SETALLOCHINT
+ ceph_le64 expected_write_size; //OP_SETALLOCHINT
+ ceph_le32 split_bits; //OP_SPLIT_COLLECTION2,OP_COLL_SET_BITS,
+ //OP_MKCOLL
+ ceph_le32 split_rem; //OP_SPLIT_COLLECTION2
+ } __attribute__ ((packed)) ;
+
+ struct TransactionData {
+ ceph_le64 ops;
+ ceph_le32 largest_data_len;
+ ceph_le32 largest_data_off;
+ ceph_le32 largest_data_off_in_data_bl;
+ ceph_le32 fadvise_flags;
+
+ TransactionData() noexcept :
+ ops(init_le64(0)),
+ largest_data_len(init_le32(0)),
+ largest_data_off(init_le32(0)),
+ largest_data_off_in_data_bl(init_le32(0)),
+ fadvise_flags(init_le32(0)) { }
+
+ // override default move operations to reset default values
+ TransactionData(TransactionData&& other) noexcept :
+ ops(other.ops),
+ largest_data_len(other.largest_data_len),
+ largest_data_off(other.largest_data_off),
+ largest_data_off_in_data_bl(other.largest_data_off_in_data_bl),
+ fadvise_flags(other.fadvise_flags) {
+ other.ops = 0;
+ other.largest_data_len = 0;
+ other.largest_data_off = 0;
+ other.largest_data_off_in_data_bl = 0;
+ other.fadvise_flags = 0;
+ }
+ TransactionData& operator=(TransactionData&& other) noexcept {
+ ops = other.ops;
+ largest_data_len = other.largest_data_len;
+ largest_data_off = other.largest_data_off;
+ largest_data_off_in_data_bl = other.largest_data_off_in_data_bl;
+ fadvise_flags = other.fadvise_flags;
+ other.ops = 0;
+ other.largest_data_len = 0;
+ other.largest_data_off = 0;
+ other.largest_data_off_in_data_bl = 0;
+ other.fadvise_flags = 0;
+ return *this;
+ }
+
+ TransactionData(const TransactionData& other) = default;
+ TransactionData& operator=(const TransactionData& other) = default;
+
+ void encode(bufferlist& bl) const {
+ bl.append((char*)this, sizeof(TransactionData));
+ }
+ void decode(bufferlist::const_iterator &bl) {
+ bl.copy(sizeof(TransactionData), (char*)this);
+ }
+ } __attribute__ ((packed)) ;
+
+private:
+ TransactionData data;
+
+ std::map<coll_t, __le32> coll_index;
+ std::map<ghobject_t, __le32> object_index;
+
+ __le32 coll_id {0};
+ __le32 object_id {0};
+
+ bufferlist data_bl;
+ bufferlist op_bl;
+
+ std::list<Context *> on_applied;
+ std::list<Context *> on_commit;
+ std::list<Context *> on_applied_sync;
+
+public:
+ Transaction() = default;
+
+ explicit Transaction(bufferlist::const_iterator &dp) {
+ decode(dp);
+ }
+ explicit Transaction(bufferlist &nbl) {
+ auto dp = nbl.cbegin();
+ decode(dp);
+ }
+
+ // override default move operations to reset default values
+ Transaction(Transaction&& other) noexcept :
+ data(std::move(other.data)),
+ coll_index(std::move(other.coll_index)),
+ object_index(std::move(other.object_index)),
+ coll_id(other.coll_id),
+ object_id(other.object_id),
+ data_bl(std::move(other.data_bl)),
+ op_bl(std::move(other.op_bl)),
+ on_applied(std::move(other.on_applied)),
+ on_commit(std::move(other.on_commit)),
+ on_applied_sync(std::move(other.on_applied_sync)) {
+ other.coll_id = 0;
+ other.object_id = 0;
+ }
+
+ Transaction& operator=(Transaction&& other) noexcept {
+ data = std::move(other.data);
+ coll_index = std::move(other.coll_index);
+ object_index = std::move(other.object_index);
+ coll_id = other.coll_id;
+ object_id = other.object_id;
+ data_bl = std::move(other.data_bl);
+ op_bl = std::move(other.op_bl);
+ on_applied = std::move(other.on_applied);
+ on_commit = std::move(other.on_commit);
+ on_applied_sync = std::move(other.on_applied_sync);
+ other.coll_id = 0;
+ other.object_id = 0;
+ return *this;
+ }
+
+ Transaction(const Transaction& other) = default;
+ Transaction& operator=(const Transaction& other) = default;
+
+ // expose object_index for FileStore::Op's benefit
+ const map<ghobject_t, __le32>& get_object_index() const {
+ return object_index;
+ }
+
+ /* Operations on callback contexts */
+ void register_on_applied(Context *c) {
+ if (!c) return;
+ on_applied.push_back(c);
+ }
+ void register_on_commit(Context *c) {
+ if (!c) return;
+ on_commit.push_back(c);
+ }
+ void register_on_applied_sync(Context *c) {
+ if (!c) return;
+ on_applied_sync.push_back(c);
+ }
+ void register_on_complete(Context *c) {
+ if (!c) return;
+ RunOnDeleteRef _complete (std::make_shared<RunOnDelete>(c));
+ register_on_applied(new ContainerContext<RunOnDeleteRef>(_complete));
+ register_on_commit(new ContainerContext<RunOnDeleteRef>(_complete));
+ }
+ bool has_contexts() const {
+ return
+ !on_commit.empty() ||
+ !on_applied.empty() ||
+ !on_applied_sync.empty();
+ }
+
+ static void collect_contexts(vector<Transaction>& t,
+ Context **out_on_applied,
+ Context **out_on_commit,
+ Context **out_on_applied_sync) {
+ ceph_assert(out_on_applied);
+ ceph_assert(out_on_commit);
+ ceph_assert(out_on_applied_sync);
+ std::list<Context *> on_applied, on_commit, on_applied_sync;
+ for (auto& i : t) {
+ on_applied.splice(on_applied.end(), i.on_applied);
+ on_commit.splice(on_commit.end(), i.on_commit);
+ on_applied_sync.splice(on_applied_sync.end(), i.on_applied_sync);
+ }
+ *out_on_applied = C_Contexts::list_to_context(on_applied);
+ *out_on_commit = C_Contexts::list_to_context(on_commit);
+ *out_on_applied_sync = C_Contexts::list_to_context(on_applied_sync);
+ }
+ static void collect_contexts(vector<Transaction>& t,
+ std::list<Context*> *out_on_applied,
+ std::list<Context*> *out_on_commit,
+ std::list<Context*> *out_on_applied_sync) {
+ ceph_assert(out_on_applied);
+ ceph_assert(out_on_commit);
+ ceph_assert(out_on_applied_sync);
+ for (auto& i : t) {
+ out_on_applied->splice(out_on_applied->end(), i.on_applied);
+ out_on_commit->splice(out_on_commit->end(), i.on_commit);
+ out_on_applied_sync->splice(out_on_applied_sync->end(),
+ i.on_applied_sync);
+ }
+ }
+
+ Context *get_on_applied() {
+ return C_Contexts::list_to_context(on_applied);
+ }
+ Context *get_on_commit() {
+ return C_Contexts::list_to_context(on_commit);
+ }
+ Context *get_on_applied_sync() {
+ return C_Contexts::list_to_context(on_applied_sync);
+ }
+
+ void set_fadvise_flags(uint32_t flags) {
+ data.fadvise_flags = flags;
+ }
+ void set_fadvise_flag(uint32_t flag) {
+ data.fadvise_flags = data.fadvise_flags | flag;
+ }
+ uint32_t get_fadvise_flags() { return data.fadvise_flags; }
+
+ void swap(Transaction& other) noexcept {
+ std::swap(data, other.data);
+ std::swap(on_applied, other.on_applied);
+ std::swap(on_commit, other.on_commit);
+ std::swap(on_applied_sync, other.on_applied_sync);
+
+ std::swap(coll_index, other.coll_index);
+ std::swap(object_index, other.object_index);
+ std::swap(coll_id, other.coll_id);
+ std::swap(object_id, other.object_id);
+ op_bl.swap(other.op_bl);
+ data_bl.swap(other.data_bl);
+ }
+
+ void _update_op(Op* op,
+ vector<__le32> &cm,
+ vector<__le32> &om) {
+
+ switch (op->op) {
+ case OP_NOP:
+ break;
+
+ case OP_TOUCH:
+ case OP_REMOVE:
+ case OP_SETATTR:
+ case OP_SETATTRS:
+ case OP_RMATTR:
+ case OP_RMATTRS:
+ case OP_COLL_REMOVE:
+ case OP_OMAP_CLEAR:
+ case OP_OMAP_SETKEYS:
+ case OP_OMAP_RMKEYS:
+ case OP_OMAP_RMKEYRANGE:
+ case OP_OMAP_SETHEADER:
+ case OP_WRITE:
+ case OP_ZERO:
+ case OP_TRUNCATE:
+ case OP_SETALLOCHINT:
+ ceph_assert(op->cid < cm.size());
+ ceph_assert(op->oid < om.size());
+ op->cid = cm[op->cid];
+ op->oid = om[op->oid];
+ break;
+
+ case OP_CLONERANGE2:
+ case OP_CLONE:
+ ceph_assert(op->cid < cm.size());
+ ceph_assert(op->oid < om.size());
+ ceph_assert(op->dest_oid < om.size());
+ op->cid = cm[op->cid];
+ op->oid = om[op->oid];
+ op->dest_oid = om[op->dest_oid];
+ break;
+
+ case OP_MKCOLL:
+ case OP_RMCOLL:
+ case OP_COLL_SETATTR:
+ case OP_COLL_RMATTR:
+ case OP_COLL_SETATTRS:
+ case OP_COLL_HINT:
+ case OP_COLL_SET_BITS:
+ ceph_assert(op->cid < cm.size());
+ op->cid = cm[op->cid];
+ break;
+
+ case OP_COLL_ADD:
+ ceph_assert(op->cid < cm.size());
+ ceph_assert(op->oid < om.size());
+ ceph_assert(op->dest_cid < om.size());
+ op->cid = cm[op->cid];
+ op->dest_cid = cm[op->dest_cid];
+ op->oid = om[op->oid];
+ break;
+
+ case OP_COLL_MOVE_RENAME:
+ ceph_assert(op->cid < cm.size());
+ ceph_assert(op->oid < om.size());
+ ceph_assert(op->dest_cid < cm.size());
+ ceph_assert(op->dest_oid < om.size());
+ op->cid = cm[op->cid];
+ op->oid = om[op->oid];
+ op->dest_cid = cm[op->dest_cid];
+ op->dest_oid = om[op->dest_oid];
+ break;
+
+ case OP_TRY_RENAME:
+ ceph_assert(op->cid < cm.size());
+ ceph_assert(op->oid < om.size());
+ ceph_assert(op->dest_oid < om.size());
+ op->cid = cm[op->cid];
+ op->oid = om[op->oid];
+ op->dest_oid = om[op->dest_oid];
+ break;
+
+ case OP_SPLIT_COLLECTION2:
+ ceph_assert(op->cid < cm.size());
+ ceph_assert(op->dest_cid < cm.size());
+ op->cid = cm[op->cid];
+ op->dest_cid = cm[op->dest_cid];
+ break;
+
+ case OP_MERGE_COLLECTION:
+ ceph_assert(op->cid < cm.size());
+ ceph_assert(op->dest_cid < cm.size());
+ op->cid = cm[op->cid];
+ op->dest_cid = cm[op->dest_cid];
+ break;
+
+ default:
+ ceph_abort_msg("Unknown OP");
+ }
+ }
+ void _update_op_bl(
+ bufferlist& bl,
+ vector<__le32> &cm,
+ vector<__le32> &om) {
+ for (auto& bp : bl.buffers()) {
+ ceph_assert(bp.length() % sizeof(Op) == 0);
+
+ char* raw_p = const_cast<char*>(bp.c_str());
+ char* raw_end = raw_p + bp.length();
+ while (raw_p < raw_end) {
+ _update_op(reinterpret_cast<Op*>(raw_p), cm, om);
+ raw_p += sizeof(Op);
+ }
+ }
+ }
+ /// Append the operations of the parameter to this Transaction. Those
+ /// operations are removed from the parameter Transaction
+ void append(Transaction& other) {
+
+ data.ops = data.ops + other.data.ops;
+ if (other.data.largest_data_len > data.largest_data_len) {
+ data.largest_data_len = other.data.largest_data_len;
+ data.largest_data_off = other.data.largest_data_off;
+ data.largest_data_off_in_data_bl = data_bl.length() + other.data.largest_data_off_in_data_bl;
+ }
+ data.fadvise_flags = data.fadvise_flags | other.data.fadvise_flags;
+ on_applied.splice(on_applied.end(), other.on_applied);
+ on_commit.splice(on_commit.end(), other.on_commit);
+ on_applied_sync.splice(on_applied_sync.end(), other.on_applied_sync);
+
+ //append coll_index & object_index
+ vector<__le32> cm(other.coll_index.size());
+ map<coll_t, __le32>::iterator coll_index_p;
+ for (coll_index_p = other.coll_index.begin();
+ coll_index_p != other.coll_index.end();
+ ++coll_index_p) {
+ cm[coll_index_p->second] = _get_coll_id(coll_index_p->first);
+ }
+
+ vector<__le32> om(other.object_index.size());
+ map<ghobject_t, __le32>::iterator object_index_p;
+ for (object_index_p = other.object_index.begin();
+ object_index_p != other.object_index.end();
+ ++object_index_p) {
+ om[object_index_p->second] = _get_object_id(object_index_p->first);
+ }
+
+ //the other.op_bl SHOULD NOT be changes during append operation,
+ //we use additional bufferlist to avoid this problem
+ bufferlist other_op_bl;
+ {
+ bufferptr other_op_bl_ptr(other.op_bl.length());
+ other.op_bl.copy(0, other.op_bl.length(), other_op_bl_ptr.c_str());
+ other_op_bl.append(std::move(other_op_bl_ptr));
+ }
+
+ //update other_op_bl with cm & om
+ //When the other is appended to current transaction, all coll_index and
+ //object_index in other.op_buffer should be updated by new index of the
+ //combined transaction
+ _update_op_bl(other_op_bl, cm, om);
+
+ //append op_bl
+ op_bl.append(other_op_bl);
+ //append data_bl
+ data_bl.append(other.data_bl);
+ }
+
+ /** Inquires about the Transaction as a whole. */
+
+ /// How big is the encoded Transaction buffer?
+ uint64_t get_encoded_bytes() {
+ //layout: data_bl + op_bl + coll_index + object_index + data
+
+ // coll_index size, object_index size and sizeof(transaction_data)
+ // all here, so they may be computed at compile-time
+ size_t final_size = sizeof(__u32) * 2 + sizeof(data);
+
+ // coll_index second and object_index second
+ final_size += (coll_index.size() + object_index.size()) * sizeof(__le32);
+
+ // coll_index first
+ for (auto p = coll_index.begin(); p != coll_index.end(); ++p) {
+ final_size += p->first.encoded_size();
+ }
+
+ // object_index first
+ for (auto p = object_index.begin(); p != object_index.end(); ++p) {
+ final_size += p->first.encoded_size();
+ }
+
+ return data_bl.length() +
+ op_bl.length() +
+ final_size;
+ }
+
+ /// Retain old version for regression testing purposes
+ uint64_t get_encoded_bytes_test() {
+ using ceph::encode;
+ //layout: data_bl + op_bl + coll_index + object_index + data
+ bufferlist bl;
+ encode(coll_index, bl);
+ encode(object_index, bl);
+
+ return data_bl.length() +
+ op_bl.length() +
+ bl.length() +
+ sizeof(data);
+ }
+
+ uint64_t get_num_bytes() {
+ return get_encoded_bytes();
+ }
+ /// Size of largest data buffer to the "write" operation encountered so far
+ uint32_t get_data_length() {
+ return data.largest_data_len;
+ }
+ /// offset within the encoded buffer to the start of the largest data buffer
+ /// that's encoded
+ uint32_t get_data_offset() {
+ if (data.largest_data_off_in_data_bl) {
+ return data.largest_data_off_in_data_bl +
+ sizeof(__u8) + // encode struct_v
+ sizeof(__u8) + // encode compat_v
+ sizeof(__u32) + // encode len
+ sizeof(__u32); // data_bl len
+ }
+ return 0; // none
+ }
+ /// offset of buffer as aligned to destination within object.
+ int get_data_alignment() {
+ if (!data.largest_data_len)
+ return 0;
+ return (0 - get_data_offset()) & ~CEPH_PAGE_MASK;
+ }
+ /// Is the Transaction empty (no operations)
+ bool empty() {
+ return !data.ops;
+ }
+ /// Number of operations in the transaction
+ int get_num_ops() {
+ return data.ops;
+ }
+
+ /**
+ * iterator
+ *
+ * Helper object to parse Transactions.
+ *
+ * ObjectStore instances use this object to step down the encoded
+ * buffer decoding operation codes and parameters as we go.
+ *
+ */
+ class iterator {
+ Transaction *t;
+
+ uint64_t ops;
+ char* op_buffer_p;
+
+ bufferlist::const_iterator data_bl_p;
+
+ public:
+ vector<coll_t> colls;
+ vector<ghobject_t> objects;
+
+ private:
+ explicit iterator(Transaction *t)
+ : t(t),
+ data_bl_p(t->data_bl.cbegin()),
+ colls(t->coll_index.size()),
+ objects(t->object_index.size()) {
+
+ ops = t->data.ops;
+ op_buffer_p = t->op_bl.c_str();
+
+ map<coll_t, __le32>::iterator coll_index_p;
+ for (coll_index_p = t->coll_index.begin();
+ coll_index_p != t->coll_index.end();
+ ++coll_index_p) {
+ colls[coll_index_p->second] = coll_index_p->first;
+ }
+
+ map<ghobject_t, __le32>::iterator object_index_p;
+ for (object_index_p = t->object_index.begin();
+ object_index_p != t->object_index.end();
+ ++object_index_p) {
+ objects[object_index_p->second] = object_index_p->first;
+ }
+ }
+
+ friend class Transaction;
+
+ public:
+
+ bool have_op() {
+ return ops > 0;
+ }
+ Op* decode_op() {
+ ceph_assert(ops > 0);
+
+ Op* op = reinterpret_cast<Op*>(op_buffer_p);
+ op_buffer_p += sizeof(Op);
+ ops--;
+
+ return op;
+ }
+ string decode_string() {
+ using ceph::decode;
+ string s;
+ decode(s, data_bl_p);
+ return s;
+ }
+ void decode_bp(bufferptr& bp) {
+ using ceph::decode;
+ decode(bp, data_bl_p);
+ }
+ void decode_bl(bufferlist& bl) {
+ using ceph::decode;
+ decode(bl, data_bl_p);
+ }
+ void decode_attrset(map<string,bufferptr>& aset) {
+ using ceph::decode;
+ decode(aset, data_bl_p);
+ }
+ void decode_attrset(map<string,bufferlist>& aset) {
+ using ceph::decode;
+ decode(aset, data_bl_p);
+ }
+ void decode_attrset_bl(bufferlist *pbl);
+ void decode_keyset(set<string> &keys){
+ using ceph::decode;
+ decode(keys, data_bl_p);
+ }
+ void decode_keyset_bl(bufferlist *pbl);
+
+ const ghobject_t &get_oid(__le32 oid_id) {
+ ceph_assert(oid_id < objects.size());
+ return objects[oid_id];
+ }
+ const coll_t &get_cid(__le32 cid_id) {
+ ceph_assert(cid_id < colls.size());
+ return colls[cid_id];
+ }
+ uint32_t get_fadvise_flags() const {
+ return t->get_fadvise_flags();
+ }
+ };
+
+ iterator begin() {
+ return iterator(this);
+ }
+
+private:
+ void _build_actions_from_tbl();
+
+ static constexpr size_t OPS_PER_PTR = 32u;
+ /**
+ * Helper functions to encode the various mutation elements of a
+ * transaction. These are 1:1 with the operation codes (see
+ * enumeration above). These routines ensure that the
+ * encoder/creator of a transaction gets the right data in the
+ * right place. Sadly, there's no corresponding version nor any
+ * form of seat belts for the decoder.
+ */
+ Op* _get_next_op() {
+ if (op_bl.get_append_buffer_unused_tail_length() < sizeof(Op)) {
+ op_bl.reserve(sizeof(Op) * OPS_PER_PTR);
+ }
+ // append_hole ensures bptr merging. Even huge number of ops
+ // shouldn't result in overpopulating bl::_buffers.
+ char* const p = op_bl.append_hole(sizeof(Op)).c_str();
+ memset(p, 0, sizeof(Op));
+ return reinterpret_cast<Op*>(p);
+ }
+ __le32 _get_coll_id(const coll_t& coll) {
+ map<coll_t, __le32>::iterator c = coll_index.find(coll);
+ if (c != coll_index.end())
+ return c->second;
+
+ __le32 index_id = coll_id++;
+ coll_index[coll] = index_id;
+ return index_id;
+ }
+ __le32 _get_object_id(const ghobject_t& oid) {
+ map<ghobject_t, __le32>::iterator o = object_index.find(oid);
+ if (o != object_index.end())
+ return o->second;
+
+ __le32 index_id = object_id++;
+ object_index[oid] = index_id;
+ return index_id;
+ }
+
+public:
+ /// noop. 'nuf said
+ void nop() {
+ Op* _op = _get_next_op();
+ _op->op = OP_NOP;
+ data.ops = data.ops + 1;
+ }
+ /**
+ * touch
+ *
+ * Ensure the existance of an object in a collection. Create an
+ * empty object if necessary
+ */
+ void touch(const coll_t& cid, const ghobject_t& oid) {
+ Op* _op = _get_next_op();
+ _op->op = OP_TOUCH;
+ _op->cid = _get_coll_id(cid);
+ _op->oid = _get_object_id(oid);
+ data.ops = data.ops + 1;
+ }
+ /**
+ * Write data to an offset within an object. If the object is too
+ * small, it is expanded as needed. It is possible to specify an
+ * offset beyond the current end of an object and it will be
+ * expanded as needed. Simple implementations of ObjectStore will
+ * just zero the data between the old end of the object and the
+ * newly provided data. More sophisticated implementations of
+ * ObjectStore will omit the untouched data and store it as a
+ * "hole" in the file.
+ *
+ * Note that a 0-length write does not affect the size of the object.
+ */
+ void write(const coll_t& cid, const ghobject_t& oid, uint64_t off, uint64_t len,
+ const bufferlist& write_data, uint32_t flags = 0) {
+ using ceph::encode;
+ uint32_t orig_len = data_bl.length();
+ Op* _op = _get_next_op();
+ _op->op = OP_WRITE;
+ _op->cid = _get_coll_id(cid);
+ _op->oid = _get_object_id(oid);
+ _op->off = off;
+ _op->len = len;
+ encode(write_data, data_bl);
+
+ ceph_assert(len == write_data.length());
+ data.fadvise_flags = data.fadvise_flags | flags;
+ if (write_data.length() > data.largest_data_len) {
+ data.largest_data_len = write_data.length();
+ data.largest_data_off = off;
+ // we are about to
+ data.largest_data_off_in_data_bl = orig_len + sizeof(__u32);
+ }
+ data.ops = data.ops + 1;
+ }
+ /**
+ * zero out the indicated byte range within an object. Some
+ * ObjectStore instances may optimize this to release the
+ * underlying storage space.
+ *
+ * If the zero range extends beyond the end of the object, the object
+ * size is extended, just as if we were writing a buffer full of zeros.
+ * EXCEPT if the length is 0, in which case (just like a 0-length write)
+ * we do not adjust the object size.
+ */
+ void zero(const coll_t& cid, const ghobject_t& oid, uint64_t off, uint64_t len) {
+ Op* _op = _get_next_op();
+ _op->op = OP_ZERO;
+ _op->cid = _get_coll_id(cid);
+ _op->oid = _get_object_id(oid);
+ _op->off = off;
+ _op->len = len;
+ data.ops = data.ops + 1;
+ }
+ /// Discard all data in the object beyond the specified size.
+ void truncate(const coll_t& cid, const ghobject_t& oid, uint64_t off) {
+ Op* _op = _get_next_op();
+ _op->op = OP_TRUNCATE;
+ _op->cid = _get_coll_id(cid);
+ _op->oid = _get_object_id(oid);
+ _op->off = off;
+ data.ops = data.ops + 1;
+ }
+ /// Remove an object. All four parts of the object are removed.
+ void remove(const coll_t& cid, const ghobject_t& oid) {
+ Op* _op = _get_next_op();
+ _op->op = OP_REMOVE;
+ _op->cid = _get_coll_id(cid);
+ _op->oid = _get_object_id(oid);
+ data.ops = data.ops + 1;
+ }
+ /// Set an xattr of an object
+ void setattr(const coll_t& cid, const ghobject_t& oid,
+ const char* name,
+ bufferlist& val) {
+ string n(name);
+ setattr(cid, oid, n, val);
+ }
+ /// Set an xattr of an object
+ void setattr(const coll_t& cid, const ghobject_t& oid,
+ const string& s, bufferlist& val) {
+ using ceph::encode;
+ Op* _op = _get_next_op();
+ _op->op = OP_SETATTR;
+ _op->cid = _get_coll_id(cid);
+ _op->oid = _get_object_id(oid);
+ encode(s, data_bl);
+ encode(val, data_bl);
+ data.ops = data.ops + 1;
+ }
+ /// Set multiple xattrs of an object
+ void setattrs(const coll_t& cid, const ghobject_t& oid,
+ const map<string,bufferptr>& attrset) {
+ using ceph::encode;
+ Op* _op = _get_next_op();
+ _op->op = OP_SETATTRS;
+ _op->cid = _get_coll_id(cid);
+ _op->oid = _get_object_id(oid);
+ encode(attrset, data_bl);
+ data.ops = data.ops + 1;
+ }
+ /// Set multiple xattrs of an object
+ void setattrs(const coll_t& cid, const ghobject_t& oid,
+ const map<string,bufferlist>& attrset) {
+ using ceph::encode;
+ Op* _op = _get_next_op();
+ _op->op = OP_SETATTRS;
+ _op->cid = _get_coll_id(cid);
+ _op->oid = _get_object_id(oid);
+ encode(attrset, data_bl);
+ data.ops = data.ops + 1;
+ }
+ /// remove an xattr from an object
+ void rmattr(const coll_t& cid, const ghobject_t& oid, const char *name) {
+ string n(name);
+ rmattr(cid, oid, n);
+ }
+ /// remove an xattr from an object
+ void rmattr(const coll_t& cid, const ghobject_t& oid, const string& s) {
+ using ceph::encode;
+ Op* _op = _get_next_op();
+ _op->op = OP_RMATTR;
+ _op->cid = _get_coll_id(cid);
+ _op->oid = _get_object_id(oid);
+ encode(s, data_bl);
+ data.ops = data.ops + 1;
+ }
+ /// remove all xattrs from an object
+ void rmattrs(const coll_t& cid, const ghobject_t& oid) {
+ Op* _op = _get_next_op();
+ _op->op = OP_RMATTRS;
+ _op->cid = _get_coll_id(cid);
+ _op->oid = _get_object_id(oid);
+ data.ops = data.ops + 1;
+ }
+ /**
+ * Clone an object into another object.
+ *
+ * Low-cost (e.g., O(1)) cloning (if supported) is best, but
+ * fallback to an O(n) copy is allowed. All four parts of the
+ * object are cloned (data, xattrs, omap header, omap
+ * entries).
+ *
+ * The destination named object may already exist, in
+ * which case its previous contents are discarded.
+ */
+ void clone(const coll_t& cid, const ghobject_t& oid,
+ const ghobject_t& noid) {
+ Op* _op = _get_next_op();
+ _op->op = OP_CLONE;
+ _op->cid = _get_coll_id(cid);
+ _op->oid = _get_object_id(oid);
+ _op->dest_oid = _get_object_id(noid);
+ data.ops = data.ops + 1;
+ }
+ /**
+ * Clone a byte range from one object to another.
+ *
+ * The data portion of the destination object receives a copy of a
+ * portion of the data from the source object. None of the other
+ * three parts of an object is copied from the source.
+ *
+ * The destination object size may be extended to the dstoff + len.
+ *
+ * The source range *must* overlap with the source object data. If it does
+ * not the result is undefined.
+ */
+ void clone_range(const coll_t& cid, const ghobject_t& oid,
+ const ghobject_t& noid,
+ uint64_t srcoff, uint64_t srclen, uint64_t dstoff) {
+ Op* _op = _get_next_op();
+ _op->op = OP_CLONERANGE2;
+ _op->cid = _get_coll_id(cid);
+ _op->oid = _get_object_id(oid);
+ _op->dest_oid = _get_object_id(noid);
+ _op->off = srcoff;
+ _op->len = srclen;
+ _op->dest_off = dstoff;
+ data.ops = data.ops + 1;
+ }
+
+ /// Create the collection
+ void create_collection(const coll_t& cid, int bits) {
+ Op* _op = _get_next_op();
+ _op->op = OP_MKCOLL;
+ _op->cid = _get_coll_id(cid);
+ _op->split_bits = bits;
+ data.ops = data.ops + 1;
+ }
+
+ /**
+ * Give the collection a hint.
+ *
+ * @param cid - collection id.
+ * @param type - hint type.
+ * @param hint - the hint payload, which contains the customized
+ * data along with the hint type.
+ */
+ void collection_hint(const coll_t& cid, uint32_t type, const bufferlist& hint) {
+ using ceph::encode;
+ Op* _op = _get_next_op();
+ _op->op = OP_COLL_HINT;
+ _op->cid = _get_coll_id(cid);
+ _op->hint_type = type;
+ encode(hint, data_bl);
+ data.ops = data.ops + 1;
+ }
+
+ /// remove the collection, the collection must be empty
+ void remove_collection(const coll_t& cid) {
+ Op* _op = _get_next_op();
+ _op->op = OP_RMCOLL;
+ _op->cid = _get_coll_id(cid);
+ data.ops = data.ops + 1;
+ }
+ void collection_move(const coll_t& cid, const coll_t &oldcid,
+ const ghobject_t& oid)
+ __attribute__ ((deprecated)) {
+ // NOTE: we encode this as a fixed combo of ADD + REMOVE. they
+ // always appear together, so this is effectively a single MOVE.
+ Op* _op = _get_next_op();
+ _op->op = OP_COLL_ADD;
+ _op->cid = _get_coll_id(oldcid);
+ _op->oid = _get_object_id(oid);
+ _op->dest_cid = _get_coll_id(cid);
+ data.ops = data.ops + 1;
+
+ _op = _get_next_op();
+ _op->op = OP_COLL_REMOVE;
+ _op->cid = _get_coll_id(oldcid);
+ _op->oid = _get_object_id(oid);
+ data.ops = data.ops + 1;
+ }
+ void collection_move_rename(const coll_t& oldcid, const ghobject_t& oldoid,
+ const coll_t &cid, const ghobject_t& oid) {
+ Op* _op = _get_next_op();
+ _op->op = OP_COLL_MOVE_RENAME;
+ _op->cid = _get_coll_id(oldcid);
+ _op->oid = _get_object_id(oldoid);
+ _op->dest_cid = _get_coll_id(cid);
+ _op->dest_oid = _get_object_id(oid);
+ data.ops = data.ops + 1;
+ }
+ void try_rename(const coll_t &cid, const ghobject_t& oldoid,
+ const ghobject_t& oid) {
+ Op* _op = _get_next_op();
+ _op->op = OP_TRY_RENAME;
+ _op->cid = _get_coll_id(cid);
+ _op->oid = _get_object_id(oldoid);
+ _op->dest_oid = _get_object_id(oid);
+ data.ops = data.ops + 1;
+ }
+
+ /// Remove omap from oid
+ void omap_clear(
+ const coll_t &cid, ///< [in] Collection containing oid
+ const ghobject_t &oid ///< [in] Object from which to remove omap
+ ) {
+ Op* _op = _get_next_op();
+ _op->op = OP_OMAP_CLEAR;
+ _op->cid = _get_coll_id(cid);
+ _op->oid = _get_object_id(oid);
+ data.ops = data.ops + 1;
+ }
+ /// Set keys on oid omap. Replaces duplicate keys.
+ void omap_setkeys(
+ const coll_t& cid, ///< [in] Collection containing oid
+ const ghobject_t &oid, ///< [in] Object to update
+ const map<string, bufferlist> &attrset ///< [in] Replacement keys and values
+ ) {
+ using ceph::encode;
+ Op* _op = _get_next_op();
+ _op->op = OP_OMAP_SETKEYS;
+ _op->cid = _get_coll_id(cid);
+ _op->oid = _get_object_id(oid);
+ encode(attrset, data_bl);
+ data.ops = data.ops + 1;
+ }
+
+ /// Set keys on an oid omap (bufferlist variant).
+ void omap_setkeys(
+ const coll_t &cid, ///< [in] Collection containing oid
+ const ghobject_t &oid, ///< [in] Object to update
+ const bufferlist &attrset_bl ///< [in] Replacement keys and values
+ ) {
+ Op* _op = _get_next_op();
+ _op->op = OP_OMAP_SETKEYS;
+ _op->cid = _get_coll_id(cid);
+ _op->oid = _get_object_id(oid);
+ data_bl.append(attrset_bl);
+ data.ops = data.ops + 1;
+ }
+
+ /// Remove keys from oid omap
+ void omap_rmkeys(
+ const coll_t &cid, ///< [in] Collection containing oid
+ const ghobject_t &oid, ///< [in] Object from which to remove the omap
+ const set<string> &keys ///< [in] Keys to clear
+ ) {
+ using ceph::encode;
+ Op* _op = _get_next_op();
+ _op->op = OP_OMAP_RMKEYS;
+ _op->cid = _get_coll_id(cid);
+ _op->oid = _get_object_id(oid);
+ encode(keys, data_bl);
+ data.ops = data.ops + 1;
+ }
+
+ /// Remove keys from oid omap
+ void omap_rmkeys(
+ const coll_t &cid, ///< [in] Collection containing oid
+ const ghobject_t &oid, ///< [in] Object from which to remove the omap
+ const bufferlist &keys_bl ///< [in] Keys to clear
+ ) {
+ Op* _op = _get_next_op();
+ _op->op = OP_OMAP_RMKEYS;
+ _op->cid = _get_coll_id(cid);
+ _op->oid = _get_object_id(oid);
+ data_bl.append(keys_bl);
+ data.ops = data.ops + 1;
+ }
+
+ /// Remove key range from oid omap
+ void omap_rmkeyrange(
+ const coll_t &cid, ///< [in] Collection containing oid
+ const ghobject_t &oid, ///< [in] Object from which to remove the omap keys
+ const string& first, ///< [in] first key in range
+ const string& last ///< [in] first key past range, range is [first,last)
+ ) {
+ using ceph::encode;
+ Op* _op = _get_next_op();
+ _op->op = OP_OMAP_RMKEYRANGE;
+ _op->cid = _get_coll_id(cid);
+ _op->oid = _get_object_id(oid);
+ encode(first, data_bl);
+ encode(last, data_bl);
+ data.ops = data.ops + 1;
+ }
+
+ /// Set omap header
+ void omap_setheader(
+ const coll_t &cid, ///< [in] Collection containing oid
+ const ghobject_t &oid, ///< [in] Object
+ const bufferlist &bl ///< [in] Header value
+ ) {
+ using ceph::encode;
+ Op* _op = _get_next_op();
+ _op->op = OP_OMAP_SETHEADER;
+ _op->cid = _get_coll_id(cid);
+ _op->oid = _get_object_id(oid);
+ encode(bl, data_bl);
+ data.ops = data.ops + 1;
+ }
+
+ /// Split collection based on given prefixes, objects matching the specified
+ /// bits/rem are moved to the new collection
+ void split_collection(
+ const coll_t &cid,
+ uint32_t bits,
+ uint32_t rem,
+ const coll_t &destination) {
+ Op* _op = _get_next_op();
+ _op->op = OP_SPLIT_COLLECTION2;
+ _op->cid = _get_coll_id(cid);
+ _op->dest_cid = _get_coll_id(destination);
+ _op->split_bits = bits;
+ _op->split_rem = rem;
+ data.ops = data.ops + 1;
+ }
+
+ /// Merge collection into another.
+ void merge_collection(
+ coll_t cid,
+ coll_t destination,
+ uint32_t bits) {
+ Op* _op = _get_next_op();
+ _op->op = OP_MERGE_COLLECTION;
+ _op->cid = _get_coll_id(cid);
+ _op->dest_cid = _get_coll_id(destination);
+ _op->split_bits = bits;
+ data.ops = data.ops + 1;
+ }
+
+ void collection_set_bits(
+ const coll_t &cid,
+ int bits) {
+ Op* _op = _get_next_op();
+ _op->op = OP_COLL_SET_BITS;
+ _op->cid = _get_coll_id(cid);
+ _op->split_bits = bits;
+ data.ops = data.ops + 1;
+ }
+
+ /// Set allocation hint for an object
+ /// make 0 values(expected_object_size, expected_write_size) noops for all implementations
+ void set_alloc_hint(
+ const coll_t &cid,
+ const ghobject_t &oid,
+ uint64_t expected_object_size,
+ uint64_t expected_write_size,
+ uint32_t flags
+ ) {
+ Op* _op = _get_next_op();
+ _op->op = OP_SETALLOCHINT;
+ _op->cid = _get_coll_id(cid);
+ _op->oid = _get_object_id(oid);
+ _op->expected_object_size = expected_object_size;
+ _op->expected_write_size = expected_write_size;
+ _op->alloc_hint_flags = flags;
+ data.ops = data.ops + 1;
+ }
+
+ void encode(bufferlist& bl) const {
+ //layout: data_bl + op_bl + coll_index + object_index + data
+ ENCODE_START(9, 9, bl);
+ encode(data_bl, bl);
+ encode(op_bl, bl);
+ encode(coll_index, bl);
+ encode(object_index, bl);
+ data.encode(bl);
+ ENCODE_FINISH(bl);
+ }
+
+ void decode(bufferlist::const_iterator &bl) {
+ DECODE_START(9, bl);
+ DECODE_OLDEST(9);
+
+ decode(data_bl, bl);
+ decode(op_bl, bl);
+ decode(coll_index, bl);
+ decode(object_index, bl);
+ data.decode(bl);
+ coll_id = coll_index.size();
+ object_id = object_index.size();
+
+ DECODE_FINISH(bl);
+ }
+
+ void dump(ceph::Formatter *f);
+};
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-17 01:48:41 +0000