Vitaliy Filippov
4a2dcf7b6b
VNPL 1.1 is slightly reworded to make it clear that proprietary software interacting with Vitastor and providing some kind of service to end users isn't a "Proxy Program" if it's not specially designed to be used with Vitastor. For example, Windows OS running in a virtual machine stored in a Vitastor cluster clearly isn't.
107 lines
3.1 KiB
C++
107 lines
3.1 KiB
C++
// Copyright (c) Vitaliy Filippov, 2019+
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// License: VNPL-1.1 or GNU GPL-2.0+ (see README.md for details)
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#pragma once
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#include "messenger.h"
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#include "etcd_state_client.h"
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#define MIN_BLOCK_SIZE 4*1024
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#define MAX_BLOCK_SIZE 128*1024*1024
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#define DEFAULT_DISK_ALIGNMENT 4096
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#define DEFAULT_BITMAP_GRANULARITY 4096
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#define DEFAULT_CLIENT_DIRTY_LIMIT 32*1024*1024
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struct cluster_op_t;
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struct cluster_op_part_t
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{
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cluster_op_t *parent;
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uint64_t offset;
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uint32_t len;
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pg_num_t pg_num;
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osd_num_t osd_num;
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osd_op_buf_list_t iov;
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bool sent;
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bool done;
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osd_op_t op;
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};
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struct cluster_op_t
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{
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uint64_t opcode; // OSD_OP_READ, OSD_OP_WRITE, OSD_OP_SYNC
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uint64_t inode;
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uint64_t offset;
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uint64_t len;
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int retval;
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osd_op_buf_list_t iov;
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std::function<void(cluster_op_t*)> callback;
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protected:
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void *buf = NULL;
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cluster_op_t *orig_op = NULL;
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bool is_internal = false;
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bool needs_reslice = false;
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bool up_wait = false;
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int sent_count = 0, done_count = 0;
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std::vector<cluster_op_part_t> parts;
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friend class cluster_client_t;
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};
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class cluster_client_t
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{
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timerfd_manager_t *tfd;
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ring_loop_t *ringloop;
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uint64_t bs_block_size = 0;
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uint64_t bs_disk_alignment = 0;
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uint64_t bs_bitmap_granularity = 0;
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std::map<pool_id_t, uint64_t> pg_counts;
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bool immediate_commit = false;
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// FIXME: Implement inmemory_commit mode. Note that it requires to return overlapping reads from memory.
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uint64_t client_dirty_limit = 0;
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int log_level;
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int up_wait_retry_interval = 500; // ms
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uint64_t op_id = 1;
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ring_consumer_t consumer;
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// operations currently in progress
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std::set<cluster_op_t*> cur_ops;
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int retry_timeout_id = 0;
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// unsynced operations are copied in memory to allow replay when cluster isn't in the immediate_commit mode
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// unsynced_writes are replayed in any order (because only the SYNC operation guarantees ordering)
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std::vector<cluster_op_t*> unsynced_writes;
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std::vector<cluster_op_t*> syncing_writes;
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cluster_op_t* cur_sync = NULL;
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std::vector<cluster_op_t*> next_writes;
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std::vector<cluster_op_t*> offline_ops;
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uint64_t queued_bytes = 0;
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bool pgs_loaded = false;
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std::vector<std::function<void(void)>> on_ready_hooks;
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public:
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etcd_state_client_t st_cli;
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osd_messenger_t msgr;
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cluster_client_t(ring_loop_t *ringloop, timerfd_manager_t *tfd, json11::Json & config);
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~cluster_client_t();
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void execute(cluster_op_t *op);
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void on_ready(std::function<void(void)> fn);
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void stop();
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protected:
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void continue_ops(bool up_retry = false);
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void on_load_config_hook(json11::Json::object & config);
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void on_load_pgs_hook(bool success);
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void on_change_hook(json11::Json::object & changes);
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void on_change_osd_state_hook(uint64_t peer_osd);
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void continue_rw(cluster_op_t *op);
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void slice_rw(cluster_op_t *op);
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bool try_send(cluster_op_t *op, cluster_op_part_t *part);
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void execute_sync(cluster_op_t *op);
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void continue_sync();
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void finish_sync();
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void send_sync(cluster_op_t *op, cluster_op_part_t *part);
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void handle_op_part(cluster_op_part_t *part);
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};
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