Add an example on how to collect stats similar to "nfsstat"

Signed-off-by: Ronnie Sahlberg <[email protected]>

examples/CMakeLists.txt

@@ -12,6 +12,7 @@ set(EXAMPLES nfsclient-async
             nfs-io
             nfs-ln
             nfs-writefile
+	    nfs-nfsstat
 	    nfs-stats-cb
             portmap-client)
 

examples/Makefile.am

@@ -1,6 +1,7 @@
 noinst_PROGRAMS = nfsclient-async nfsclient-raw nfsclient-sync \
 	nfsclient-bcast nfsclient-listservers nfs-fh nfs-io nfs-ln nfs4-cat \
-	portmap-client portmap-server nfs-writefile nfs-stats-cb
+	portmap-client portmap-server nfs-writefile nfs-stats-cb \
+	nfs-nfsstat
 
 if HAVE_TALLOC_TEVENT
 noinst_PROGRAMS += nfs4-cat-talloc
@@ -42,3 +43,4 @@ nfs_pthreads_fstat_LDADD = $(COMMON_LIBS)
 nfs_pthreads_writefile_LDADD = $(COMMON_LIBS)
 nfs_pthreads_async_writefile_LDADD = $(COMMON_LIBS)
 nfs_stats_cb_LDADD = $(COMMON_LIBS)
+nfs_nfsstat_LDADD = $(COMMON_LIBS)

examples/nfs-nfsstat.c

@@ -0,0 +1,277 @@
+/* 
+   Copyright (C) by Ronnie Sahlberg <[email protected]> 2015
+   
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+   
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+   
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, see <http://www.gnu.org/licenses/>.
+*/
+
+/*
+ * This example setts up stats collection, reads the specific file
+ * and finally prints the stats on a per procedure when finished.
+ */
+
+#define _FILE_OFFSET_BITS 64
+#define _GNU_SOURCE
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#ifdef AROS
+#include "aros_compat.h"
+#endif
+
+
+#ifdef WIN32
+#include <win32/win32_compat.h>
+#pragma comment(lib, "ws2_32.lib")
+WSADATA wsaData;
+#else
+#include <sys/stat.h>
+#include <string.h>
+#endif
+
+#ifdef HAVE_POLL_H
+#include <poll.h>
+#endif
+
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <sys/types.h>
+#include <fcntl.h>
+#include "libnfs.h"
+#include "libnfs-raw.h"
+#include "libnfs-raw-mount.h"
+#include "libnfs-raw-nfs.h"
+
+struct file_context {
+	int fd;
+	struct nfs_context *nfs;
+	struct nfsfh *nfsfh;
+	struct nfs_url *url;
+};
+
+void usage(void)
+{
+	fprintf(stderr, "Usage: nfs-nfsstat <file>\n");
+	fprintf(stderr, "<file> read a file and print the stats callback data.\n");
+	exit(0);
+}
+
+static void
+free_file_context(struct file_context *file_context)
+{
+	if (file_context->fd != -1) {
+		close(file_context->fd);
+	}
+	if (file_context->nfsfh != NULL) {
+		nfs_close(file_context->nfs, file_context->nfsfh);
+	}
+	if (file_context->nfs != NULL) {
+		nfs_destroy_context(file_context->nfs);
+	}
+	nfs_destroy_url(file_context->url);
+	free(file_context);
+}
+
+struct nfsstat {
+	uint32_t count;
+	uint32_t errors;
+	uint64_t max_response_time;
+	uint64_t aggregated_response_time;
+};
+
+struct nfsstat nfs3stats[22];
+
+void stats_cb(struct rpc_context *rpc,
+	      struct rpc_stats_cb_data *data, void *private_data)
+{
+	if (data->prog != NFS_PROGRAM) {
+		return;
+	}
+	if (data->vers == NFS_V3) {
+		if (data->proc > 21) {
+			return;
+		}
+		nfs3stats[data->proc].count++;
+		if (data->status) {
+			nfs3stats[data->proc].errors++;
+		}
+		if (nfs3stats[data->proc].max_response_time < data->response_time) {
+			nfs3stats[data->proc].max_response_time = data->response_time;
+		}
+		nfs3stats[data->proc].aggregated_response_time += data->response_time;
+	}
+}
+
+char *nfs3names[22] = {
+		"NULL",
+		"GETATTR",
+		"SETATTR",
+		"LOOKUP",
+		"ACCESS",
+		"READLINK",
+		"READ",
+		"WRITE",
+		"CREATE",
+		"MKDIR",
+		"SYMLINK",
+		"MKNOD",
+		"REMOVE",
+		"RMDIR",
+		"RENAME",
+		"LINK",
+		"READDIR",
+		"READDIRPLUS",
+		"FSSTAT",
+		"FSINFO",
+		"PATHCONF",
+		"COMMIT"
+};
+
+void print_final_stats(void)
+{
+	int i;
+	uint64_t avg;
+
+	printf("%-12s %5s %6s %21s %25s\n", "PROCEDURE", "COUNT", "ERRORS", "MAX RESPONSE TIME(ms)", "AVERAGE RESPONSE TIME(ms)");
+	for (i = 0; i < 22; i++) {
+		avg = 0;
+		if (nfs3stats[i].count) {
+			avg = nfs3stats[i].aggregated_response_time / nfs3stats[i].count;
+		}
+		printf("%-12s %5d %6d %21d %25d\n", nfs3names[i], nfs3stats[i].count, nfs3stats[i].errors, nfs3stats[i].max_response_time, avg);
+	}
+}
+
+static struct file_context *
+open_file(const char *url, int flags)
+{
+	struct file_context *file_context;
+
+	file_context = malloc(sizeof(struct file_context));
+	if (file_context == NULL) {
+		fprintf(stderr, "Failed to malloc file_context\n");
+		return NULL;
+	}
+	file_context->fd     = -1;
+	file_context->nfs    = NULL;
+	file_context->nfsfh  = NULL;
+	file_context->url    = NULL;
+
+	file_context->nfs = nfs_init_context();
+	if (file_context->nfs == NULL) {
+		fprintf(stderr, "failed to init context\n");
+		free_file_context(file_context);
+		return NULL;
+	}
+
+	rpc_set_stats_cb(nfs_get_rpc_context(file_context->nfs), stats_cb, NULL);
+
+	file_context->url = nfs_parse_url_full(file_context->nfs, url);
+	if (file_context->url == NULL) {
+		fprintf(stderr, "%s\n", nfs_get_error(file_context->nfs));
+		free_file_context(file_context);
+		return NULL;
+	}
+
+	if (nfs_mount(file_context->nfs, file_context->url->server,
+				file_context->url->path) != 0) {
+		fprintf(stderr, "Failed to mount nfs share : %s\n",
+			       nfs_get_error(file_context->nfs));
+		free_file_context(file_context);
+		return NULL;
+	}
+
+	if (flags == O_RDONLY) {
+		if (nfs_open(file_context->nfs, file_context->url->file, flags,
+				&file_context->nfsfh) != 0) {
+ 			fprintf(stderr, "Failed to open file %s: %s\n",
+				       file_context->url->file,
+				       nfs_get_error(file_context->nfs));
+			free_file_context(file_context);
+			return NULL;
+		}
+	} else {
+		if (nfs_creat(file_context->nfs, file_context->url->file, 0660,
+				&file_context->nfsfh) != 0) {
+ 			fprintf(stderr, "Failed to creat file %s: %s\n",
+				       file_context->url->file,
+				       nfs_get_error(file_context->nfs));
+			free_file_context(file_context);
+			return NULL;
+		}
+	}
+	return file_context;
+}
+
+
+#define BUFSIZE 1024*1024
+static char buf[BUFSIZE];
+
+int main(int argc, char *argv[])
+{
+	struct file_context *nf;
+	struct nfs_stat_64 st;
+	uint64_t off;
+	int64_t count;
+
+#ifdef WIN32
+	if (WSAStartup(MAKEWORD(2,2), &wsaData) != 0) {
+		printf("Failed to start Winsock2\n");
+		return 10;
+	}
+#endif
+
+#ifdef AROS
+	aros_init_socket();
+#endif
+
+	if (argc < 2) {
+		usage();
+	}
+
+	nf = open_file(argv[1], O_RDONLY);
+	if (nf == NULL) {
+		fprintf(stderr, "Failed to open %s\n", argv[1]);
+		exit(10);
+	}
+	if (nfs_fstat64(nf->nfs, nf->nfsfh, &st) < 0) {
+		fprintf(stderr, "Failed to stat %s\n", argv[1]);
+		exit(10);
+	}
+
+	off = 0;
+	while (off < st.nfs_size) {
+		count = st.nfs_size - off;
+		if (count > BUFSIZE) {
+			count = BUFSIZE;
+		}
+		count = nfs_pread(nf->nfs, nf->nfsfh, buf, count, off);
+		if (count < 0) {
+			fprintf(stderr, "Failed to read from file\n");
+			free_file_context(nf);
+			return 10;
+		}
+		off += count;
+	}
+
+	free_file_context(nf);
+	print_final_stats();
+	return 0;
+}