X-Git-Url: https://git.kernel.dk/?p=fio.git;a=blobdiff_plain;f=server.c;h=7202f10fcbbd542e9d9bdc05319c20c8a24041a1;hp=5ef0fe01dd808d5aecd69901f8ad6dec95f42f83;hb=b75a394fd0e9455ab71912d4462aaae7e6e4366b;hpb=690e09aeff6111f0654899840280196cf8c96224

diff --git a/server.c b/server.c
index 5ef0fe01..7202f10f 100644
--- a/server.c
+++ b/server.c
@@ -1,34 +1,335 @@
 #include <stdio.h>
 #include <stdlib.h>
+#include <stdarg.h>
 #include <unistd.h>
 #include <limits.h>
-#include <string.h>
-#include <getopt.h>
 #include <errno.h>
 #include <fcntl.h>
 #include <sys/poll.h>
-#include <sys/stat.h>
 #include <sys/types.h>
 #include <sys/wait.h>
-#include <sys/time.h>
 #include <sys/mman.h>
-#include <signal.h>
 #include <netinet/in.h>
 #include <arpa/inet.h>
 #include <netdb.h>
+#include <syslog.h>
 
 #include "fio.h"
+#include "server.h"
+#include "crc/crc16.h"
 
-static int net_port = 8765;
+int fio_net_port = 8765;
 
 int exit_backend = 0;
 
+static int server_fd = -1;
+
+int fio_send_data(int sk, const void *p, unsigned int len)
+{
+	assert(len <= sizeof(struct fio_net_cmd) + FIO_SERVER_MAX_PDU);
+
+	do {
+		int ret = send(sk, p, len, 0);
+
+		if (ret > 0) {
+			len -= ret;
+			if (!len)
+				break;
+			p += ret;
+			continue;
+		} else if (!ret)
+			break;
+		else if (errno == EAGAIN || errno == EINTR)
+			continue;
+	} while (!exit_backend);
+
+	if (!len)
+		return 0;
+
+	return 1;
+}
+
+int fio_recv_data(int sk, void *p, unsigned int len)
+{
+	do {
+		int ret = recv(sk, p, len, MSG_WAITALL);
+
+		if (ret > 0) {
+			len -= ret;
+			if (!len)
+				break;
+			p += ret;
+			continue;
+		} else if (!ret)
+			break;
+		else if (errno == EAGAIN || errno == EINTR)
+			continue;
+	} while (!exit_backend);
+
+	if (!len)
+		return 0;
+
+	return -1;
+}
+
+static int verify_convert_cmd(struct fio_net_cmd *cmd)
+{
+	uint16_t crc;
+
+	cmd->cmd_crc16 = le16_to_cpu(cmd->cmd_crc16);
+	cmd->pdu_crc16 = le16_to_cpu(cmd->pdu_crc16);
+
+	crc = crc16(cmd, FIO_NET_CMD_CRC_SZ);
+	if (crc != cmd->cmd_crc16) {
+		log_err("fio: server bad crc on command (got %x, wanted %x)\n",
+				cmd->cmd_crc16, crc);
+		return 1;
+	}
+
+	cmd->version	= le16_to_cpu(cmd->version);
+	cmd->opcode	= le16_to_cpu(cmd->opcode);
+	cmd->flags	= le32_to_cpu(cmd->flags);
+	cmd->serial	= le64_to_cpu(cmd->serial);
+	cmd->pdu_len	= le32_to_cpu(cmd->pdu_len);
+
+	switch (cmd->version) {
+	case FIO_SERVER_VER1:
+		break;
+	default:
+		log_err("fio: bad server cmd version %d\n", cmd->version);
+		return 1;
+	}
+
+	if (cmd->pdu_len > FIO_SERVER_MAX_PDU) {
+		log_err("fio: command payload too large: %u\n", cmd->pdu_len);
+		return 1;
+	}
+
+	return 0;
+}
+
+/*
+ * Read (and defragment, if necessary) incoming commands
+ */
+struct fio_net_cmd *fio_net_recv_cmd(int sk)
+{
+	struct fio_net_cmd cmd, *cmdret = NULL;
+	size_t cmd_size = 0, pdu_offset = 0;
+	uint16_t crc;
+	int ret, first = 1;
+	void *pdu = NULL;
+
+	do {
+		ret = fio_recv_data(sk, &cmd, sizeof(cmd));
+		if (ret)
+			break;
+
+		/* We have a command, verify it and swap if need be */
+		ret = verify_convert_cmd(&cmd);
+		if (ret)
+			break;
+
+		if (first)
+			cmd_size = sizeof(cmd) + cmd.pdu_len;
+		else
+			cmd_size += cmd.pdu_len;
+
+		cmdret = realloc(cmdret, cmd_size);
+
+		if (first)
+			memcpy(cmdret, &cmd, sizeof(cmd));
+		else
+			assert(cmdret->opcode == cmd.opcode);
+
+		if (!cmd.pdu_len)
+			break;
+
+		/* There's payload, get it */
+		pdu = (void *) cmdret->payload + pdu_offset;
+		ret = fio_recv_data(sk, pdu, cmd.pdu_len);
+		if (ret)
+			break;
+
+		/* Verify payload crc */
+		crc = crc16(pdu, cmd.pdu_len);
+		if (crc != cmd.pdu_crc16) {
+			log_err("fio: server bad crc on payload ");
+			log_err("(got %x, wanted %x)\n", cmd.pdu_crc16, crc);
+			ret = 1;
+			break;
+		}
+
+		pdu_offset += cmd.pdu_len;
+		if (!first)
+			cmdret->pdu_len += cmd.pdu_len;
+		first = 0;
+	} while (cmd.flags & FIO_NET_CMD_F_MORE);
+
+	if (ret) {
+		free(cmdret);
+		cmdret = NULL;
+	}
+
+	if (cmdret)
+		cmdret->flags &= ~FIO_NET_CMD_F_MORE;
+
+	return cmdret;
+}
+
+void fio_net_cmd_crc(struct fio_net_cmd *cmd)
+{
+	uint32_t pdu_len;
+
+	cmd->cmd_crc16 = __cpu_to_le16(crc16(cmd, FIO_NET_CMD_CRC_SZ));
+
+	pdu_len = le32_to_cpu(cmd->pdu_len);
+	if (pdu_len)
+		cmd->pdu_crc16 = __cpu_to_le16(crc16(cmd->payload, pdu_len));
+}
+
+int fio_net_send_cmd(int fd, uint16_t opcode, const void *buf, off_t size)
+{
+	struct fio_net_cmd *cmd;
+	size_t this_len;
+	int ret;
+
+	do {
+		this_len = size;
+		if (this_len > FIO_SERVER_MAX_PDU)
+			this_len = FIO_SERVER_MAX_PDU;
+
+		cmd = malloc(sizeof(*cmd) + this_len);
+
+		fio_init_net_cmd(cmd, opcode, buf, this_len);
+
+		if (this_len < size)
+			cmd->flags = __cpu_to_le32(FIO_NET_CMD_F_MORE);
+
+		fio_net_cmd_crc(cmd);
+
+		ret = fio_send_data(fd, cmd, sizeof(*cmd) + this_len);
+		free(cmd);
+		size -= this_len;
+		buf += this_len;
+	} while (!ret && size);
+
+	return ret;
+}
+
+static int send_simple_command(int sk, uint16_t opcode, uint64_t serial)
+{
+	struct fio_net_cmd cmd = {
+		.version	= __cpu_to_le16(FIO_SERVER_VER1),
+		.opcode		= cpu_to_le16(opcode),
+		.serial		= cpu_to_le64(serial),
+	};
+
+	fio_net_cmd_crc(&cmd);
+
+	return fio_send_data(sk, &cmd, sizeof(cmd));
+}
+
+/*
+ * Send an ack for this command
+ */
+static int ack_command(int sk, struct fio_net_cmd *cmd)
+{
+#if 0
+	return send_simple_command(sk, FIO_NET_CMD_ACK, cmd->serial);
+#else
+	return 0;
+#endif
+}
+
+#if 0
+static int nak_command(int sk, struct fio_net_cmd *cmd)
+{
+	return send_simple_command(sk, FIO_NET_CMD_NAK, cmd->serial);
+}
+#endif
+
+static int send_quit_command(void)
+{
+	dprint(FD_NET, "server: sending quit\n");
+	return send_simple_command(server_fd, FIO_NET_CMD_QUIT, 0);
+}
+
+static int handle_cur_job(struct fio_net_cmd *cmd)
+{
+	void *buf = cmd->payload;
+	int ret;
+
+	parse_jobs_ini(buf, 1, 0);
+	ret = exec_run();
+	send_quit_command();
+	reset_fio_state();
+	return ret;
+}
+
+static int handle_command(struct fio_net_cmd *cmd)
+{
+	int ret;
+
+	dprint(FD_NET, "server: got opcode %d\n", cmd->opcode);
+
+	switch (cmd->opcode) {
+	case FIO_NET_CMD_QUIT:
+		return 1;
+	case FIO_NET_CMD_EXIT:
+		exit_backend = 1;
+		return 1;
+	case FIO_NET_CMD_ACK:
+		return 0;
+	case FIO_NET_CMD_NAK:
+		return 1;
+	case FIO_NET_CMD_JOB:
+		ret = handle_cur_job(cmd);
+		break;
+	default:
+		log_err("fio: unknown opcode: %d\n", cmd->opcode);
+		ret = 1;
+	}
+
+	return ret;
+}
+
+static int handle_connection(int sk)
+{
+	struct fio_net_cmd *cmd = NULL;
+	int ret = 0;
+
+	/* read forever */
+	while (!exit_backend) {
+		cmd = fio_net_recv_cmd(sk);
+		if (!cmd) {
+			ret = 1;
+			break;
+		}
+
+		ret = ack_command(sk, cmd);
+		if (ret)
+			break;
+
+		ret = handle_command(cmd);
+		if (ret)
+			break;
+
+		free(cmd);
+		cmd = NULL;
+	}
+
+	if (cmd)
+		free(cmd);
+
+	return ret;
+}
+
 static int accept_loop(int listen_sk)
 {
 	struct sockaddr addr;
 	unsigned int len = sizeof(addr);
 	struct pollfd pfd;
-	int ret, sk, flags;
+	int ret, sk, flags, exitval = 0;
 
 	flags = fcntl(listen_sk, F_GETFL);
 	flags |= O_NONBLOCK;
@@ -41,7 +342,7 @@ again:
 		if (ret < 0) {
 			if (errno == EINTR)
 				break;
-			perror("poll");
+			log_err("fio: poll: %s\n", strerror(errno));
 			goto out;
 		} else if (!ret)
 			continue;
@@ -59,43 +360,31 @@ again:
 		return -1;
 	}
 
-	/* read forever */
-	while (!exit_backend) {
-		char buf[131072];
+	dprint(FD_NET, "server got a connection\n");
 
-		ret = recv(sk, buf, 4096, 0);
-		if (ret > 0) {
-			if (!strncmp("FIO_QUIT", buf, 8)) {
-				exit_backend = 1;
-				break;
-			}
-			parse_jobs_ini(buf, 1, 0);
-			exec_run();
-			reset_fio_state();
-			break;
-		} else if (!ret)
-			break;
-		if (errno == EAGAIN || errno == EINTR)
-			continue;
-		break;
-	}
+	server_fd = sk;
+
+	exitval = handle_connection(sk);
 
+	server_fd = -1;
 	close(sk);
 
 	if (!exit_backend)
 		goto again;
 
 out:
-	return 0;
+	return exitval;
 }
 
-int fio_server(void)
+static int fio_server(void)
 {
 	struct sockaddr_in saddr_in;
 	struct sockaddr addr;
 	unsigned int len;
 	int sk, opt, ret;
 
+	dprint(FD_NET, "starting server\n");
+
 	sk = socket(AF_INET, SOCK_STREAM, 0);
 	if (sk < 0) {
 		log_err("fio: socket: %s\n", strerror(errno));
@@ -116,7 +405,7 @@ int fio_server(void)
 
 	saddr_in.sin_family = AF_INET;
 	saddr_in.sin_addr.s_addr = htonl(INADDR_ANY);
-	saddr_in.sin_port = htons(net_port);
+	saddr_in.sin_port = htons(fio_net_port);
 
 	if (bind(sk, (struct sockaddr *) &saddr_in, sizeof(saddr_in)) < 0) {
 		log_err("fio: bind: %s\n", strerror(errno));
@@ -138,3 +427,156 @@ int fio_server(void)
 	close(sk);
 	return ret;
 }
+
+int fio_server_text_output(const char *buf, unsigned int len)
+{
+	if (server_fd != -1)
+		return fio_net_send_cmd(server_fd, FIO_NET_CMD_TEXT, buf, len);
+
+	return 0;
+}
+
+static void convert_io_stat(struct io_stat *dst, struct io_stat *src)
+{
+	dst->max_val	= cpu_to_le64(src->max_val);
+	dst->min_val	= cpu_to_le64(src->min_val);
+	dst->samples	= cpu_to_le64(src->samples);
+	/* FIXME */
+	dst->mean	= __cpu_to_le64(src->mean);
+	dst->S		= __cpu_to_le64(src->S);
+}
+
+static void convert_gs(struct group_run_stats *dst, struct group_run_stats *src)
+{
+	int i;
+
+	for (i = 0; i < 2; i++) {
+		dst->max_run[i]		= cpu_to_le64(src->max_run[i]);
+		dst->min_run[i]		= cpu_to_le64(src->min_run[i]);
+		dst->max_bw[i]		= cpu_to_le64(src->max_bw[i]);
+		dst->min_bw[i]		= cpu_to_le64(src->min_bw[i]);
+		dst->io_kb[i]		= cpu_to_le64(src->io_kb[i]);
+		dst->agg[i]		= cpu_to_le64(src->agg[i]);
+	}
+
+	dst->kb_base	= cpu_to_le32(src->kb_base);
+	dst->groupid	= cpu_to_le32(src->groupid);
+}
+
+/*
+ * Send a CMD_TS, which packs struct thread_stat and group_run_stats
+ * into a single payload.
+ */
+void fio_server_send_ts(struct thread_stat *ts, struct group_run_stats *rs)
+{
+	struct cmd_ts_pdu p;
+	int i, j;
+
+	strcpy(p.ts.name, ts->name);
+	strcpy(p.ts.verror, ts->verror);
+	strcpy(p.ts.description, ts->description);
+
+	p.ts.error	= cpu_to_le32(ts->error);
+	p.ts.groupid	= cpu_to_le32(ts->groupid);
+	p.ts.pid	= cpu_to_le32(ts->pid);
+	p.ts.members	= cpu_to_le32(ts->members);
+
+	for (i = 0; i < 2; i++) {
+		convert_io_stat(&p.ts.clat_stat[i], &ts->clat_stat[i]);
+		convert_io_stat(&p.ts.slat_stat[i], &ts->slat_stat[i]);
+		convert_io_stat(&p.ts.lat_stat[i], &ts->lat_stat[i]);
+		convert_io_stat(&p.ts.bw_stat[i], &ts->bw_stat[i]);
+	}
+
+	p.ts.usr_time		= cpu_to_le64(ts->usr_time);
+	p.ts.sys_time		= cpu_to_le64(ts->sys_time);
+	p.ts.ctx		= cpu_to_le64(ts->ctx);
+	p.ts.minf		= cpu_to_le64(ts->minf);
+	p.ts.majf		= cpu_to_le64(ts->majf);
+	p.ts.clat_percentiles	= cpu_to_le64(ts->clat_percentiles);
+	p.ts.percentile_list	= NULL;
+
+	for (i = 0; i < FIO_IO_U_MAP_NR; i++) {
+		p.ts.io_u_map[i]	= cpu_to_le32(ts->io_u_map[i]);
+		p.ts.io_u_submit[i]	= cpu_to_le32(ts->io_u_submit[i]);
+		p.ts.io_u_complete[i]	= cpu_to_le32(ts->io_u_complete[i]);
+	}
+
+	for (i = 0; i < FIO_IO_U_LAT_U_NR; i++) {
+		p.ts.io_u_lat_u[i]	= cpu_to_le32(ts->io_u_lat_u[i]);
+		p.ts.io_u_lat_m[i]	= cpu_to_le32(ts->io_u_lat_m[i]);
+	}
+
+	for (i = 0; i < 2; i++)
+		for (j = 0; j < FIO_IO_U_PLAT_NR; j++)
+			p.ts.io_u_plat[i][j] = cpu_to_le32(ts->io_u_plat[i][j]);
+
+	for (i = 0; i < 3; i++) {
+		p.ts.total_io_u[i]	= cpu_to_le64(ts->total_io_u[i]);
+		p.ts.short_io_u[i]	= cpu_to_le64(ts->total_io_u[i]);
+	}
+
+	p.ts.total_submit		= cpu_to_le64(ts->total_submit);
+	p.ts.total_complete	= cpu_to_le64(ts->total_complete);
+
+	for (i = 0; i < 2; i++) {
+		p.ts.io_bytes[i]	= cpu_to_le64(ts->io_bytes[i]);
+		p.ts.runtime[i]		= cpu_to_le64(ts->runtime[i]);
+	}
+
+	p.ts.total_run_time	= cpu_to_le64(ts->total_run_time);
+	p.ts.continue_on_error	= cpu_to_le16(ts->continue_on_error);
+	p.ts.total_err_count	= cpu_to_le64(ts->total_err_count);
+	p.ts.first_error	= cpu_to_le32(ts->first_error);
+	p.ts.kb_base		= cpu_to_le32(ts->kb_base);
+
+	convert_gs(&p.rs, rs);
+
+	fio_net_send_cmd(server_fd, FIO_NET_CMD_TS, &p, sizeof(p));
+}
+
+void fio_server_send_gs(struct group_run_stats *rs)
+{
+	struct group_run_stats gs;
+
+	convert_gs(&gs, rs);
+	fio_net_send_cmd(server_fd, FIO_NET_CMD_GS, &gs, sizeof(gs));
+}
+
+int fio_server_log(const char *format, ...)
+{
+	char buffer[1024];
+	va_list args;
+	size_t len;
+
+	va_start(args, format);
+	len = vsnprintf(buffer, sizeof(buffer), format, args);
+	va_end(args);
+
+	return fio_server_text_output(buffer, len);
+}
+
+int fio_start_server(int daemonize)
+{
+	pid_t pid;
+
+	if (!daemonize)
+		return fio_server();
+
+	openlog("fio", LOG_NDELAY|LOG_NOWAIT|LOG_PID, LOG_USER);
+	pid = fork();
+	if (pid < 0) {
+		syslog(LOG_ERR, "failed server fork");
+		return 1;
+	} else if (pid)
+		exit(0);
+
+	setsid();
+	close(STDIN_FILENO);
+	close(STDOUT_FILENO);
+	close(STDERR_FILENO);
+	f_out = NULL;
+	f_err = NULL;
+	log_syslog = 1;
+	return fio_server();
+}