--- /dev/null
+/* Blue Sky: File Systems in the Cloud
+ *
+ * Copyright (C) 2009 The Regents of the University of California
+ * Written by Michael Vrable <mvrable@cs.ucsd.edu>
+ *
+ * TODO: Licensing
+ */
+
+/* Synthetic client for benchmarking: a tool for directly generating NFS
+ * requests and reading back the responses, so that we can exercise the server
+ * differently than the Linux kernel NFS client does.
+ *
+ * Much of this is copied from rpc.c and other BlueSky server code but is
+ * designed to run independently of BlueSky. */
+
+#include "mount_prot.h"
+#include "nfs3_prot.h"
+#include <stdio.h>
+#include <stdlib.h>
+#include <inttypes.h>
+#include <rpc/pmap_clnt.h>
+#include <string.h>
+#include <signal.h>
+#include <memory.h>
+#include <netdb.h>
+#include <sys/socket.h>
+#include <sys/types.h>
+#include <netinet/in.h>
+#include <netinet/ip.h>
+#include <glib.h>
+
+/* TCP port number to use for NFS protocol. (Would be 2049 in standard NFS.) */
+#define NFS_SERVICE_PORT 2051
+
+/* Maximum size of a single RPC message that we will accept (8 MB). */
+#define MAX_RPC_MSGSIZE (8 << 20)
+
+int threads;
+int completed = 0;
+
+struct bench_file {
+ uint64_t inum;
+ uint64_t size;
+};
+
+GArray *bench_files;
+
+struct rpc_reply {
+ uint32_t xid;
+ uint32_t type;
+ uint32_t stat;
+ uint32_t verf_flavor;
+ uint32_t verf_len;
+ uint32_t accept_stat;
+};
+
+struct rpc_fail_reply {
+ uint32_t xid;
+ uint32_t type;
+ uint32_t stat;
+ uint32_t verf_flavor;
+ uint32_t verf_len;
+ uint32_t accept_stat;
+};
+
+struct rpc_call_header {
+ uint32_t xid;
+ uint32_t mtype;
+ uint32_t rpcvers;
+ uint32_t prog;
+ uint32_t vers;
+ uint32_t proc;
+};
+
+struct rpc_auth {
+ uint32_t flavor;
+ uint32_t len;
+};
+
+typedef struct {
+ GIOChannel *channel;
+
+ /* The reassembled message, thus far. */
+ GString *msgbuf;
+
+ /* Remaining number of bytes in this message fragment; 0 if we next expect
+ * another fragment header. */
+ uint32_t frag_len;
+
+ /* If frag_len is zero: the number of bytes of the fragment header that
+ * have been read so far. */
+ int frag_hdr_bytes;
+
+ /* Mapping of XID values to outstanding RPC calls. */
+ GHashTable *xid_table;
+} NFSConnection;
+
+
+typedef void (*NFSFunc)(NFSConnection *nfs,
+ gpointer user_data, const char *reply, size_t len);
+
+typedef struct {
+ NFSFunc callback;
+ gpointer user_data;
+ int64_t start, end;
+} CallInfo;
+
+static GMainLoop *main_loop;
+
+int64_t now_hires()
+{
+ struct timespec time;
+
+ if (clock_gettime(CLOCK_REALTIME, &time) != 0) {
+ perror("clock_gettime");
+ return 0;
+ }
+
+ return (int64_t)(time.tv_sec) * 1000000000 + time.tv_nsec;
+}
+
+static void do_write(NFSConnection *conn, const char *buf, size_t len)
+{
+ while (len > 0) {
+ gsize written = 0;
+ switch (g_io_channel_write_chars(conn->channel, buf, len,
+ &written, NULL)) {
+ case G_IO_STATUS_ERROR:
+ case G_IO_STATUS_EOF:
+ case G_IO_STATUS_AGAIN:
+ fprintf(stderr, "Error writing to socket!\n");
+ return;
+ case G_IO_STATUS_NORMAL:
+ len -= written;
+ buf += written;
+ break;
+ }
+ }
+}
+
+static void send_rpc(NFSConnection *nfs, int proc, GString *msg,
+ NFSFunc completion_handler, gpointer user_data)
+{
+ static int xid_count = 0;
+ struct rpc_call_header header;
+ struct rpc_auth auth;
+
+ header.xid = GUINT32_TO_BE(xid_count++);
+ header.mtype = 0;
+ header.rpcvers = GUINT32_TO_BE(2);
+ header.prog = GUINT32_TO_BE(NFS_PROGRAM);
+ header.vers = GUINT32_TO_BE(NFS_V3);
+ header.proc = GUINT32_TO_BE(proc);
+
+ auth.flavor = GUINT32_TO_BE(AUTH_NULL);
+ auth.len = 0;
+
+ CallInfo *info = g_new0(CallInfo, 1);
+
+ uint32_t fragment = htonl(0x80000000
+ | (sizeof(header) + 2*sizeof(auth) + msg->len));
+ do_write(nfs, (const char *)&fragment, sizeof(fragment));
+ do_write(nfs, (const char *)&header, sizeof(header));
+ do_write(nfs, (const char *)&auth, sizeof(auth));
+ do_write(nfs, (const char *)&auth, sizeof(auth));
+ do_write(nfs, msg->str, msg->len);
+ g_io_channel_flush(nfs->channel, NULL);
+
+ info->start = now_hires();
+ info->callback = completion_handler;
+ info->user_data = user_data;
+ g_hash_table_insert(nfs->xid_table,
+ GINT_TO_POINTER(GUINT32_FROM_BE(header.xid)), info);
+}
+
+static void process_reply(NFSConnection *nfs, GString *msg)
+{
+ struct rpc_reply *reply = (struct rpc_reply *)msg->str;
+
+ uint32_t xid = GUINT32_FROM_BE(reply->xid);
+
+ gpointer key = GINT_TO_POINTER(GUINT32_FROM_BE(reply->xid));
+ CallInfo *info = g_hash_table_lookup(nfs->xid_table, key);
+ if (info == NULL) {
+ g_print("Could not match reply XID %d with a call!\n", xid);
+ return;
+ }
+
+ info->end = now_hires();
+ printf("XID %d: Time = %"PRIi64"\n", xid, info->end - info->start);
+ if (info->callback != NULL)
+ info->callback(nfs, info->user_data,
+ msg->str + sizeof(*reply), msg->len - sizeof(*reply));
+
+ g_hash_table_remove(nfs->xid_table, key);
+ g_free(info);
+
+ completed++;
+ if (completed == 128 * threads) {
+ g_main_loop_quit(main_loop);
+ }
+}
+
+static gboolean read_handler(GIOChannel *channel,
+ GIOCondition condition,
+ gpointer data)
+{
+ NFSConnection *nfs = (NFSConnection *)data;
+
+ gsize bytes_to_read = 0; /* Number of bytes to attempt to read. */
+
+ /* If we have not yet read in the fragment header, do that first. This is
+ * 4 bytes that indicates the number of bytes in the message to follow
+ * (with the high bit set if this is the last fragment making up the
+ * message). */
+ if (nfs->frag_len == 0) {
+ bytes_to_read = 4 - nfs->frag_hdr_bytes;
+ } else {
+ bytes_to_read = nfs->frag_len & 0x7fffffff;
+ }
+
+ if (bytes_to_read > MAX_RPC_MSGSIZE
+ || nfs->msgbuf->len + bytes_to_read > MAX_RPC_MSGSIZE)
+ {
+ fprintf(stderr, "Excessive fragment size for RPC: %zd bytes\n",
+ bytes_to_read);
+ g_io_channel_shutdown(nfs->channel, TRUE, NULL);
+ return FALSE;
+ }
+
+ gsize bytes_read = 0;
+ g_string_set_size(nfs->msgbuf, nfs->msgbuf->len + bytes_to_read);
+ char *buf = &nfs->msgbuf->str[nfs->msgbuf->len - bytes_to_read];
+ switch (g_io_channel_read_chars(nfs->channel, buf,
+ bytes_to_read, &bytes_read, NULL)) {
+ case G_IO_STATUS_NORMAL:
+ break;
+ case G_IO_STATUS_AGAIN:
+ return TRUE;
+ case G_IO_STATUS_EOF:
+ if (bytes_read == bytes_to_read)
+ break;
+ /* else fall through */
+ case G_IO_STATUS_ERROR:
+ fprintf(stderr, "Unexpected error or end of file on RPC stream %d!\n",
+ g_io_channel_unix_get_fd(nfs->channel));
+ g_io_channel_shutdown(nfs->channel, TRUE, NULL);
+ /* TODO: Clean up connection object. */
+ return FALSE;
+ }
+
+ g_assert(bytes_read >= 0 && bytes_read <= bytes_to_read);
+
+ g_string_set_size(nfs->msgbuf,
+ nfs->msgbuf->len - (bytes_to_read - bytes_read));
+
+ if (nfs->frag_len == 0) {
+ /* Handle reading in the fragment header. If we've read the complete
+ * header, store the fragment size. */
+ nfs->frag_hdr_bytes += bytes_read;
+ if (nfs->frag_hdr_bytes == 4) {
+ memcpy((char *)&nfs->frag_len,
+ &nfs->msgbuf->str[nfs->msgbuf->len - 4], 4);
+ nfs->frag_len = ntohl(nfs->frag_len);
+ g_string_set_size(nfs->msgbuf, nfs->msgbuf->len - 4);
+ nfs->frag_hdr_bytes = 0;
+ }
+ } else {
+ /* We were reading in the fragment body. */
+ nfs->frag_len -= bytes_read;
+
+ if (nfs->frag_len == 0x80000000) {
+ process_reply(nfs, nfs->msgbuf);
+ nfs->frag_len = 0;
+ g_string_set_size(nfs->msgbuf, 0);
+ }
+ }
+
+ return TRUE;
+}
+
+static void send_read_request(NFSConnection *nfs, uint64_t inum,
+ uint64_t offset, uint64_t len);
+
+static void finish_read_request(NFSConnection *nfs, gpointer user_data,
+ const char *reply, size_t len)
+{
+ printf("Done reading inode %d\n", GPOINTER_TO_INT(user_data));
+
+ struct bench_file *bf;
+ bf = &g_array_index(bench_files, struct bench_file,
+ g_random_int_range(0, bench_files->len));
+ send_read_request(nfs, bf->inum, 0, 1048576);
+}
+
+static void send_read_request(NFSConnection *nfs, uint64_t inum,
+ uint64_t offset, uint64_t len)
+{
+ struct nfs_fh3 fh;
+ uint64_t fhdata = GUINT64_TO_BE(inum);
+ fh.data.data_val = (char *)&fhdata;
+ fh.data.data_len = 8;
+ int i;
+
+ char buf[64];
+ struct read3args read;
+ memcpy(&read.file, &fh, sizeof(struct nfs_fh3));
+ read.offset = offset;
+ read.count = len;
+
+ GString *str = g_string_new("");
+ XDR xdr;
+ xdr_string_create(&xdr, str, XDR_ENCODE);
+ xdr_read3args(&xdr, &read);
+ send_rpc(nfs, NFSPROC3_READ, str, finish_read_request,
+ GINT_TO_POINTER((int)inum));
+ g_string_free(str, TRUE);
+}
+
+static gboolean idle_handler(gpointer data)
+{
+ NFSConnection *nfs = (NFSConnection *)data;
+ int i;
+
+ for (i = 0; i < threads; i++) {
+ struct bench_file *bf;
+ bf = &g_array_index(bench_files, struct bench_file,
+ g_random_int_range(0, bench_files->len));
+ send_read_request(nfs, bf->inum, 0, 1048576);
+ }
+
+#if 0
+ g_print("Sending requests...\n");
+ for (i = 0; i < threads; i++) {
+ char buf[64];
+ struct diropargs3 lookup;
+ uint64_t rootfh = GUINT64_TO_BE(1);
+
+ sprintf(buf, "file-%d", i + 1);
+ lookup.dir.data.data_len = 8;
+ lookup.dir.data.data_val = (char *)&rootfh;
+ lookup.name = buf;
+
+ GString *str = g_string_new("");
+ XDR xdr;
+ xdr_string_create(&xdr, str, XDR_ENCODE);
+ xdr_diropargs3(&xdr, &lookup);
+ send_rpc(nfs, NFSPROC3_LOOKUP, str, store_fh, NULL);
+ g_string_free(str, TRUE);
+ }
+#endif
+
+ return FALSE;
+}
+
+NFSConnection *nfs_connect(const char *hostname)
+{
+ int result;
+ struct addrinfo hints;
+ struct addrinfo *ai = NULL;
+
+ int fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
+ if (fd < 0) {
+ fprintf(stderr, "Unable to create NFS TCP socket: %m\n");
+ exit(1);
+ }
+
+ memset(&hints, 0, sizeof(hints));
+ hints.ai_family = AF_INET;
+ hints.ai_socktype = SOCK_STREAM;
+ hints.ai_protocol = IPPROTO_TCP;
+ result = getaddrinfo(hostname, "2051", NULL, &ai);
+ if (result < 0 || ai == NULL) {
+ fprintf(stderr, "Hostname lookup failure for %s: %s\n",
+ hostname, gai_strerror(result));
+ exit(1);
+ }
+
+ if (connect(fd, ai->ai_addr, ai->ai_addrlen) < 0) {
+ fprintf(stderr, "Unable to connect to : %m\n");
+ }
+
+ freeaddrinfo(ai);
+
+ NFSConnection *conn = g_new0(NFSConnection, 1);
+ conn->msgbuf = g_string_new("");
+ conn->xid_table = g_hash_table_new(g_direct_hash, g_direct_equal);
+
+ conn->channel = g_io_channel_unix_new(fd);
+ g_io_channel_set_encoding(conn->channel, NULL, NULL);
+ g_io_channel_set_flags(conn->channel, G_IO_FLAG_NONBLOCK, NULL);
+ g_io_add_watch(conn->channel, G_IO_IN, read_handler, conn);
+
+ g_idle_add(idle_handler, conn);
+
+ return conn;
+}
+
+int main(int argc, char *argv[])
+{
+ g_thread_init(NULL);
+ g_set_prgname("synclient");
+ g_print("Launching synthetic NFS RPC client...\n");
+
+ bench_files = g_array_new(FALSE, TRUE, sizeof(struct bench_file));
+
+ FILE *inodes = fopen(argv[1], "r");
+ if (inodes == NULL) {
+ perror("fopen");
+ return 1;
+ }
+ while (!feof(inodes)) {
+ int i1 = -1, i2 = -1;
+ fscanf(inodes, "%d %d", &i1, &i2);
+ if (i1 < 0 || i2 < 0)
+ continue;
+
+ struct bench_file bf;
+ bf.inum = i1;
+ bf.size = i2;
+ g_array_append_val(bench_files, bf);
+ }
+
+ threads = 8;
+ if (argc > 2)
+ threads = atoi(argv[2]);
+
+ main_loop = g_main_loop_new(NULL, FALSE);
+ nfs_connect("niniel.sysnet.ucsd.edu");
+
+ g_main_loop_run(main_loop);
+
+ return 0;
+}
projects / bluesky.git / commitdiff