(Probably almost) implement cluster client
This commit is contained in:
Vitaliy Filippov
@@ -0,0 +1,309 @@
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#include "cluster_client.h"
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cluster_client_t::cluster_client_t(ring_loop_t *ringloop, timerfd_manager_t *tfd)
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{
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this->ringloop = ringloop;
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this->tfd = tfd;
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msgr.tfd = tfd;
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msgr.ringloop = ringloop;
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msgr.repeer_pgs = [this](osd_num_t peer_osd)
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{
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// peer_osd just connected or dropped connection
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if (msgr.osd_peer_fds.find(peer_osd) != msgr.osd_peer_fds.end())
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{
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// really connected :)
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continue_ops();
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}
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};
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st_cli.tfd = tfd;
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st_cli.log_level = log_level;
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st_cli.on_load_config_hook = [this](json11::Json::object & cfg) { on_load_config_hook(cfg); };
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st_cli.on_change_osd_state_hook = [this](uint64_t peer_osd) { on_change_osd_state_hook(peer_osd); };
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st_cli.on_change_hook = [this](json11::Json::object & changes) { on_change_hook(changes); };
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st_cli.on_load_pgs_hook = [this](bool success) { on_load_pgs_hook(success); };
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st_cli.load_global_config();
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}
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void cluster_client_t::continue_ops()
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{
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for (auto op_it = unsent_ops.begin(); op_it != unsent_ops.end(); )
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{
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cluster_op_t *op = *op_it;
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if (op->needs_reslice && !op->sent_count)
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{
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op->parts.clear();
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op->done_count = 0;
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op->needs_reslice = false;
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}
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if (!op->parts.size())
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{
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unsent_ops.erase(op_it++);
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execute(op);
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continue;
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}
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if (!op->needs_reslice)
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{
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for (auto & op_part: op->parts)
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{
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if (!op_part.sent && !op_part.done)
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{
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try_send(op, &op_part);
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}
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}
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if (op->sent_count == op->parts.size() - op->done_count)
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{
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unsent_ops.erase(op_it++);
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sent_ops.insert(op);
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}
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else
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op_it++;
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}
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else
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op_it++;
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}
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}
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static uint32_t is_power_of_two(uint64_t value)
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{
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uint32_t l = 0;
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while (value > 1)
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{
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if (value & 1)
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{
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return 64;
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}
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value = value >> 1;
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l++;
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}
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return l;
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}
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void cluster_client_t::on_load_config_hook(json11::Json::object & config)
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{
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bs_block_size = config["block_size"].uint64_value();
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bs_disk_alignment = config["disk_alignment"].uint64_value();
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bs_bitmap_granularity = config["bitmap_granularity"].uint64_value();
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if (!bs_block_size)
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bs_block_size = DEFAULT_BLOCK_SIZE;
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if (!bs_disk_alignment)
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bs_disk_alignment = DEFAULT_DISK_ALIGNMENT;
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if (!bs_bitmap_granularity)
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bs_bitmap_granularity = DEFAULT_BITMAP_GRANULARITY;
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{
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uint32_t block_order;
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if ((block_order = is_power_of_two(bs_block_size)) >= 64 || bs_block_size < MIN_BLOCK_SIZE || bs_block_size >= MAX_BLOCK_SIZE)
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throw std::runtime_error("Bad block size");
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}
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if (config.find("pg_stripe_size") != config.end())
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{
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pg_stripe_size = config["pg_stripe_size"].uint64_value();
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if (!pg_stripe_size)
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pg_stripe_size = DEFAULT_PG_STRIPE_SIZE;
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}
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msgr.peer_connect_interval = config["peer_connect_interval"].uint64_value();
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if (!msgr.peer_connect_interval)
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msgr.peer_connect_interval = DEFAULT_PEER_CONNECT_INTERVAL;
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msgr.peer_connect_timeout = config["peer_connect_timeout"].uint64_value();
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if (!msgr.peer_connect_timeout)
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msgr.peer_connect_timeout = DEFAULT_PEER_CONNECT_TIMEOUT;
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}
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void cluster_client_t::on_load_pgs_hook(bool success)
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{
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if (success)
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{
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pg_count = st_cli.pg_config.size();
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continue_ops();
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}
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}
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void cluster_client_t::on_change_hook(json11::Json::object & changes)
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{
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if (pg_count != st_cli.pg_config.size())
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{
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// At this point, all operations should be suspended
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// And they need to be resliced!
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for (auto op: unsent_ops)
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{
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op->needs_reslice = true;
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}
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for (auto op: sent_ops)
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{
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op->needs_reslice = true;
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}
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pg_count = st_cli.pg_config.size();
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}
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continue_ops();
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}
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void cluster_client_t::on_change_osd_state_hook(uint64_t peer_osd)
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{
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if (msgr.wanted_peers.find(peer_osd) != msgr.wanted_peers.end())
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{
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msgr.connect_peer(peer_osd, st_cli.peer_states[peer_osd]);
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}
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}
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void cluster_client_t::execute(cluster_op_t *op)
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{
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if (op->opcode != OSD_OP_READ && op->opcode != OSD_OP_OUT || !op->inode || !op->len ||
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op->offset % bs_disk_alignment || op->len % bs_disk_alignment)
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{
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op->retval = -EINVAL;
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std::function<void(cluster_op_t*)>(op->callback)(op);
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return;
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}
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if (!pg_stripe_size)
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{
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// Config is not loaded yet
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unsent_ops.insert(op);
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return;
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}
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// Slice the request into individual object stripe requests
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// Primary OSDs still operate individual stripes, but their size is multiplied by PG minsize in case of EC
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uint64_t pg_block_size = bs_block_size * pg_part_count;
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uint64_t first_stripe = (op->offset / pg_block_size) * pg_block_size;
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uint64_t last_stripe = ((op->offset + op->len + pg_block_size - 1) / pg_block_size - 1) * pg_block_size;
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int part_count = 0;
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for (uint64_t stripe = first_stripe; stripe <= last_stripe; stripe += pg_block_size)
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{
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if (op->offset < (stripe+pg_block_size) && (op->offset+op->len) > stripe)
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{
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part_count++;
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}
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}
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op->parts.resize(part_count);
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bool resend = false;
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int i = 0;
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for (uint64_t stripe = first_stripe; stripe <= last_stripe; stripe += pg_block_size)
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{
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uint64_t stripe_end = stripe + pg_block_size;
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if (op->offset < stripe_end && (op->offset+op->len) > stripe)
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{
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pg_num_t pg_num = (op->inode + stripe/pg_stripe_size) % pg_count + 1;
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op->parts[i] = {
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.parent = op,
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.offset = op->offset < stripe ? stripe : op->offset,
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.len = (uint32_t)((op->offset+op->len) > stripe_end ? pg_block_size : op->offset+op->len-stripe),
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.pg_num = pg_num,
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.buf = op->buf + (op->offset < stripe ? stripe-op->offset : 0),
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.sent = false,
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.done = false,
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};
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if (!try_send(op, &op->parts[i]))
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{
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// Part needs to be sent later
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resend = true;
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}
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i++;
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}
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}
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if (resend)
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{
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unsent_ops.insert(op);
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}
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else
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{
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sent_ops.insert(op);
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}
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}
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bool cluster_client_t::try_send(cluster_op_t *op, cluster_op_part_t *part)
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{
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auto pg_it = st_cli.pg_config.find(part->pg_num);
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if (pg_it != st_cli.pg_config.end() &&
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!pg_it->second.pause && pg_it->second.cur_primary)
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{
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osd_num_t primary_osd = pg_it->second.cur_primary;
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auto peer_it = msgr.osd_peer_fds.find(primary_osd);
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if (peer_it != msgr.osd_peer_fds.end())
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{
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int peer_fd = peer_it->second;
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part->osd_num = primary_osd;
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part->sent = true;
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op->sent_count++;
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part->op = {
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.op_type = OSD_OP_OUT,
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.peer_fd = peer_fd,
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.req = { .rw = {
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.header = {
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.magic = SECONDARY_OSD_OP_MAGIC,
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.id = op_id++,
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.opcode = op->opcode,
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},
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.inode = op->inode,
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.offset = part->offset,
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.len = part->len,
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} },
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.callback = [this, part](osd_op_t *op_part)
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{
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handle_op_part(part);
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},
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};
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part->op.send_list.push_back(part->op.req.buf, OSD_PACKET_SIZE);
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if (op->opcode == OSD_OP_WRITE)
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{
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part->op.send_list.push_back(part->buf, part->len);
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}
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else
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{
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part->op.buf = part->buf;
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}
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msgr.outbox_push(&part->op);
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return true;
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}
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else if (msgr.wanted_peers.find(primary_osd) == msgr.wanted_peers.end())
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{
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msgr.connect_peer(primary_osd, st_cli.peer_states[primary_osd]);
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}
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}
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return false;
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}
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void cluster_client_t::handle_op_part(cluster_op_part_t *part)
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{
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cluster_op_t *op = part->parent;
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part->sent = false;
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op->sent_count--;
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part->op.buf = NULL;
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if (part->op.reply.hdr.retval != part->op.req.rw.len)
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{
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// Operation failed, retry
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printf(
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"Operation part failed on OSD %lu: retval=%ld (expected %u), reconnecting\n",
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part->osd_num, part->op.reply.hdr.retval, part->op.req.rw.len
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);
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msgr.stop_client(part->op.peer_fd);
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if (op->sent_count == op->parts.size() - op->done_count - 1)
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{
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// Resend later when OSDs come up
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// FIXME: Check for different types of errors
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// FIXME: Repeat operations after a small timeout, for the case when OSD is coming up
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sent_ops.erase(op);
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unsent_ops.insert(op);
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}
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if (op->sent_count == 0 && op->needs_reslice)
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{
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// PG count has changed, reslice the operation
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unsent_ops.erase(op);
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op->parts.clear();
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op->done_count = 0;
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op->needs_reslice = false;
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execute(op);
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}
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}
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else
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{
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// OK
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part->done = true;
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op->done_count++;
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if (op->done_count >= op->parts.size())
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{
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// Finished!
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op->retval = op->len;
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std::function<void(cluster_op_t*)>(op->callback)(op);
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}
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}
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}
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