Move all sources to subdirs

src/test/stub_osd.cpp

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+// Copyright (c) Vitaliy Filippov, 2019+
+// License: VNPL-1.1 or GNU GPL-2.0+ (see README.md for details)
+
+/**
+ * Stub "OSD" to test & compare network performance with sync read/write and io_uring
+ *
+ * Core i7-6700HQ laptop
+ *
+ * stub_osd:
+ * randwrite Q1 S1: 36900 iops
+ * randwrite Q32 S32: 71000 iops
+ * randwrite Q32 S32 (multi-fsync fix): 113000 iops
+ * randread Q1: 67300 iops
+ * randread Q32: 144000 iops
+ *
+ * io_uring osd with #define OSD_STUB:
+ * randwrite Q1 S1: 30000 iops
+ * randwrite Q32 S32: 78600 iops
+ * randwrite Q32 S32 (multi-fsync fix): 125000 iops
+ * randread Q1: 50700 iops
+ * randread Q32: 86100 iops
+ *
+ * It seems io_uring is fine :)
+ */
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <netinet/tcp.h>
+#include <arpa/inet.h>
+#include <string.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <stdlib.h>
+
+#include <stdexcept>
+
+#include "addr_util.h"
+#include "rw_blocking.h"
+#include "osd_ops.h"
+
+void run_stub(int peer_fd);
+
+int main(int narg, char *args[])
+{
+    int listen_fd = create_and_bind_socket("0.0.0.0", 11203, 128, NULL);
+    // Accept new connections
+    sockaddr_storage addr;
+    socklen_t peer_addr_size = sizeof(addr);
+    int peer_fd;
+    while (1)
+    {
+        printf("stub_osd: waiting for 1 client\n");
+        peer_fd = accept(listen_fd, (sockaddr*)&addr, &peer_addr_size);
+        if (peer_fd == -1)
+        {
+            if (errno == EAGAIN)
+                continue;
+            else
+                throw std::runtime_error(std::string("accept: ") + strerror(errno));
+        }
+        printf("stub_osd: new client %d: connection from %s\n", peer_fd,
+            addr_to_string(addr).c_str());
+        int one = 1;
+        setsockopt(peer_fd, SOL_TCP, TCP_NODELAY, &one, sizeof(one));
+        run_stub(peer_fd);
+        close(peer_fd);
+        printf("stub_osd: client %d disconnected\n", peer_fd);
+        // Try to accept next connection
+        peer_addr_size = sizeof(addr);
+    }
+    return 0;
+}
+
+void run_stub(int peer_fd)
+{
+    osd_any_op_t op;
+    osd_any_reply_t reply = {};
+    void *buf = NULL;
+    while (1)
+    {
+        int r = read_blocking(peer_fd, op.buf, OSD_PACKET_SIZE);
+        if (r < OSD_PACKET_SIZE)
+        {
+            break;
+        }
+        if (op.hdr.magic != SECONDARY_OSD_OP_MAGIC)
+        {
+            printf("client %d: bad magic number in operation header\n", peer_fd);
+            break;
+        }
+        reply.hdr.magic = SECONDARY_OSD_REPLY_MAGIC;
+        reply.hdr.id = op.hdr.id;
+        reply.hdr.opcode = op.hdr.opcode;
+        if (op.hdr.opcode == OSD_OP_SEC_READ)
+        {
+            reply.hdr.retval = op.sec_rw.len;
+            buf = malloc(op.sec_rw.len);
+            r = write_blocking(peer_fd, reply.buf, OSD_PACKET_SIZE);
+            if (r == OSD_PACKET_SIZE)
+                r = write_blocking(peer_fd, buf, op.sec_rw.len);
+            free(buf);
+            if (r < op.sec_rw.len)
+                break;
+        }
+        else if (op.hdr.opcode == OSD_OP_SEC_WRITE || op.hdr.opcode == OSD_OP_SEC_WRITE_STABLE)
+        {
+            buf = malloc(op.sec_rw.len);
+            r = read_blocking(peer_fd, buf, op.sec_rw.len);
+            free(buf);
+            reply.hdr.retval = op.sec_rw.len;
+            if (r == op.sec_rw.len)
+                r = write_blocking(peer_fd, reply.buf, OSD_PACKET_SIZE);
+            else
+                r = 0;
+            if (r < OSD_PACKET_SIZE)
+                break;
+        }
+        else if (op.hdr.opcode == OSD_OP_TEST_SYNC_STAB_ALL)
+        {
+            reply.hdr.retval = 0;
+            r = write_blocking(peer_fd, reply.buf, OSD_PACKET_SIZE);
+            if (r < OSD_PACKET_SIZE)
+                break;
+        }
+        else
+        {
+            printf("client %d: unsupported stub opcode: %ju\n", peer_fd, op.hdr.opcode);
+            break;
+        }
+    }
+}