client/server: make sure that all elements in io_u_lat_m[] are transferred and received
[fio.git] / server.c
index eccd9d37e80f9b48026c9d5435111c84c55e15ca..1e269c29da15319ac22ede6f56b81301926d50f5 100644 (file)
--- a/server.c
+++ b/server.c
@@ -50,17 +50,6 @@ struct sk_entry {
        struct flist_head next; /* Other sk_entry's, if linked command */
 };
 
-struct sk_out {
-       unsigned int refs;      /* frees sk_out when it drops to zero.
-                                * protected by below ->lock */
-
-       int sk;                 /* socket fd to talk to client */
-       struct fio_mutex lock;  /* protects ref and below list */
-       struct flist_head list; /* list of pending transmit work */
-       struct fio_mutex wait;  /* wake backend when items added to list */
-       struct fio_mutex xmit;  /* held while sending data */
-};
-
 static char *fio_server_arg;
 static char *bind_sock;
 static struct sockaddr_in saddr_in;
@@ -114,6 +103,7 @@ static const char *fio_server_ops[FIO_NET_CMD_NR] = {
        "LOAD_FILE",
        "VTRIGGER",
        "SENDFILE",
+       "JOB_OPT",
 };
 
 static void sk_lock(struct sk_out *sk_out)
@@ -262,10 +252,17 @@ static int fio_send_data(int sk, const void *p, unsigned int len)
        return fio_sendv_data(sk, &iov, 1);
 }
 
-static int fio_recv_data(int sk, void *p, unsigned int len)
+static int fio_recv_data(int sk, void *p, unsigned int len, bool wait)
 {
+       int flags;
+
+       if (wait)
+               flags = MSG_WAITALL;
+       else
+               flags = OS_MSG_DONTWAIT;
+
        do {
-               int ret = recv(sk, p, len, MSG_WAITALL);
+               int ret = recv(sk, p, len, flags);
 
                if (ret > 0) {
                        len -= ret;
@@ -275,9 +272,11 @@ static int fio_recv_data(int sk, void *p, unsigned int len)
                        continue;
                } else if (!ret)
                        break;
-               else if (errno == EAGAIN || errno == EINTR)
-                       continue;
-               else
+               else if (errno == EAGAIN || errno == EINTR) {
+                       if (wait)
+                               continue;
+                       break;
+               } else
                        break;
        } while (!exit_backend);
 
@@ -326,7 +325,7 @@ static int verify_convert_cmd(struct fio_net_cmd *cmd)
 /*
  * Read (and defragment, if necessary) incoming commands
  */
-struct fio_net_cmd *fio_net_recv_cmd(int sk)
+struct fio_net_cmd *fio_net_recv_cmd(int sk, bool wait)
 {
        struct fio_net_cmd cmd, *tmp, *cmdret = NULL;
        size_t cmd_size = 0, pdu_offset = 0;
@@ -335,7 +334,7 @@ struct fio_net_cmd *fio_net_recv_cmd(int sk)
        void *pdu = NULL;
 
        do {
-               ret = fio_recv_data(sk, &cmd, sizeof(cmd));
+               ret = fio_recv_data(sk, &cmd, sizeof(cmd), wait);
                if (ret)
                        break;
 
@@ -379,7 +378,7 @@ struct fio_net_cmd *fio_net_recv_cmd(int sk)
 
                /* There's payload, get it */
                pdu = (void *) cmdret->payload + pdu_offset;
-               ret = fio_recv_data(sk, pdu, cmd.pdu_len);
+               ret = fio_recv_data(sk, pdu, cmd.pdu_len, wait);
                if (ret)
                        break;
 
@@ -568,8 +567,12 @@ static int fio_net_queue_cmd(uint16_t opcode, void *buf, off_t size,
        struct sk_entry *entry;
 
        entry = fio_net_prep_cmd(opcode, buf, size, tagptr, flags);
-       fio_net_queue_entry(entry);
-       return 0;
+       if (entry) {
+               fio_net_queue_entry(entry);
+               return 0;
+       }
+
+       return 1;
 }
 
 static int fio_net_send_simple_stack_cmd(int sk, uint16_t opcode, uint64_t tag)
@@ -612,7 +615,7 @@ static int fio_net_queue_quit(void)
 {
        dprint(FD_NET, "server: sending quit\n");
 
-       return fio_net_queue_cmd(FIO_NET_CMD_QUIT, NULL, 0, 0, SK_F_SIMPLE);
+       return fio_net_queue_cmd(FIO_NET_CMD_QUIT, NULL, 0, NULL, SK_F_SIMPLE);
 }
 
 int fio_net_send_quit(int sk)
@@ -898,11 +901,11 @@ static int handle_send_eta_cmd(struct fio_net_cmd *cmd)
                je->files_open          = cpu_to_le32(je->files_open);
 
                for (i = 0; i < DDIR_RWDIR_CNT; i++) {
-                       je->m_rate[i]   = cpu_to_le32(je->m_rate[i]);
-                       je->t_rate[i]   = cpu_to_le32(je->t_rate[i]);
+                       je->m_rate[i]   = cpu_to_le64(je->m_rate[i]);
+                       je->t_rate[i]   = cpu_to_le64(je->t_rate[i]);
                        je->m_iops[i]   = cpu_to_le32(je->m_iops[i]);
                        je->t_iops[i]   = cpu_to_le32(je->t_iops[i]);
-                       je->rate[i]     = cpu_to_le32(je->rate[i]);
+                       je->rate[i]     = cpu_to_le64(je->rate[i]);
                        je->iops[i]     = cpu_to_le32(je->iops[i]);
                }
 
@@ -962,9 +965,9 @@ static int handle_trigger_cmd(struct fio_net_cmd *cmd)
                struct all_io_list state;
 
                state.threads = cpu_to_le64((uint64_t) 0);
-               fio_net_queue_cmd(FIO_NET_CMD_VTRIGGER, &state, sizeof(state), NULL, SK_F_COPY);
+               fio_net_queue_cmd(FIO_NET_CMD_VTRIGGER, &state, sizeof(state), NULL, SK_F_COPY | SK_F_INLINE);
        } else
-               fio_net_queue_cmd(FIO_NET_CMD_VTRIGGER, rep, sz, NULL, SK_F_FREE);
+               fio_net_queue_cmd(FIO_NET_CMD_VTRIGGER, rep, sz, NULL, SK_F_FREE | SK_F_INLINE);
 
        exec_trigger(buf);
        return 0;
@@ -1053,17 +1056,35 @@ static int fio_send_cmd_ext_pdu(int sk, uint16_t opcode, const void *buf,
 {
        struct fio_net_cmd cmd;
        struct iovec iov[2];
+       size_t this_len;
+       int ret;
 
        iov[0].iov_base = (void *) &cmd;
        iov[0].iov_len = sizeof(cmd);
-       iov[1].iov_base = (void *) buf;
-       iov[1].iov_len = size;
 
-       __fio_init_net_cmd(&cmd, opcode, size, tag);
-       cmd.flags = __cpu_to_le32(flags);
-       fio_net_cmd_crc_pdu(&cmd, buf);
+       do {
+               uint32_t this_flags = flags;
+
+               this_len = size;
+               if (this_len > FIO_SERVER_MAX_FRAGMENT_PDU)
+                       this_len = FIO_SERVER_MAX_FRAGMENT_PDU;
 
-       return fio_sendv_data(sk, iov, 2);
+               if (this_len < size)
+                       this_flags |= FIO_NET_CMD_F_MORE;
+
+               __fio_init_net_cmd(&cmd, opcode, this_len, tag);
+               cmd.flags = __cpu_to_le32(this_flags);
+               fio_net_cmd_crc_pdu(&cmd, buf);
+
+               iov[1].iov_base = (void *) buf;
+               iov[1].iov_len = this_len;
+
+               ret = fio_sendv_data(sk, iov, 2);
+               size -= this_len;
+               buf += this_len;
+       } while (!ret && size);
+
+       return ret;
 }
 
 static void finish_entry(struct sk_entry *entry)
@@ -1209,7 +1230,7 @@ static int handle_connection(struct sk_out *sk_out)
                if (ret < 0)
                        break;
 
-               cmd = fio_net_recv_cmd(sk_out->sk);
+               cmd = fio_net_recv_cmd(sk_out->sk, true);
                if (!cmd) {
                        ret = -1;
                        break;
@@ -1412,7 +1433,7 @@ static void convert_gs(struct group_run_stats *dst, struct group_run_stats *src)
                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->iobytes[i]         = cpu_to_le64(src->iobytes[i]);
                dst->agg[i]             = cpu_to_le64(src->agg[i]);
        }
 
@@ -1430,6 +1451,8 @@ void fio_server_send_ts(struct thread_stat *ts, struct group_run_stats *rs)
 {
        struct cmd_ts_pdu p;
        int i, j;
+       void *ss_buf;
+       uint64_t *ss_iops, *ss_bw;
 
        dprint(FD_NET, "server sending end stats\n");
 
@@ -1474,10 +1497,10 @@ void fio_server_send_ts(struct thread_stat *ts, struct group_run_stats *rs)
                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++) {
+       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]);
+       for (i = 0; i < FIO_IO_U_LAT_M_NR; i++)
                p.ts.io_u_lat_m[i]      = cpu_to_le32(ts->io_u_lat_m[i]);
-       }
 
        for (i = 0; i < DDIR_RWDIR_CNT; i++)
                for (j = 0; j < FIO_IO_U_PLAT_NR; j++)
@@ -1509,13 +1532,41 @@ void fio_server_send_ts(struct thread_stat *ts, struct group_run_stats *rs)
        p.ts.latency_window     = cpu_to_le64(ts->latency_window);
        p.ts.latency_percentile.u.i = cpu_to_le64(fio_double_to_uint64(ts->latency_percentile.u.f));
 
-       p.ts.nr_block_infos     = le64_to_cpu(ts->nr_block_infos);
+       p.ts.nr_block_infos     = cpu_to_le64(ts->nr_block_infos);
        for (i = 0; i < p.ts.nr_block_infos; i++)
-               p.ts.block_infos[i] = le32_to_cpu(ts->block_infos[i]);
+               p.ts.block_infos[i] = cpu_to_le32(ts->block_infos[i]);
+
+       p.ts.ss_dur             = cpu_to_le64(ts->ss_dur);
+       p.ts.ss_state           = cpu_to_le32(ts->ss_state);
+       p.ts.ss_head            = cpu_to_le32(ts->ss_head);
+       p.ts.ss_limit.u.i       = cpu_to_le64(fio_double_to_uint64(ts->ss_limit.u.f));
+       p.ts.ss_slope.u.i       = cpu_to_le64(fio_double_to_uint64(ts->ss_slope.u.f));
+       p.ts.ss_deviation.u.i   = cpu_to_le64(fio_double_to_uint64(ts->ss_deviation.u.f));
+       p.ts.ss_criterion.u.i   = cpu_to_le64(fio_double_to_uint64(ts->ss_criterion.u.f));
 
        convert_gs(&p.rs, rs);
 
-       fio_net_queue_cmd(FIO_NET_CMD_TS, &p, sizeof(p), NULL, SK_F_COPY);
+       dprint(FD_NET, "ts->ss_state = %d\n", ts->ss_state);
+       if (ts->ss_state & __FIO_SS_DATA) {
+               dprint(FD_NET, "server sending steadystate ring buffers\n");
+
+               ss_buf = malloc(sizeof(p) + 2*ts->ss_dur*sizeof(uint64_t));
+
+               memcpy(ss_buf, &p, sizeof(p));
+
+               ss_iops = (uint64_t *) ((struct cmd_ts_pdu *)ss_buf + 1);
+               ss_bw = ss_iops + (int) ts->ss_dur;
+               for (i = 0; i < ts->ss_dur; i++) {
+                       ss_iops[i] = cpu_to_le64(ts->ss_iops_data[i]);
+                       ss_bw[i] = cpu_to_le64(ts->ss_bw_data[i]);
+               }
+
+               fio_net_queue_cmd(FIO_NET_CMD_TS, ss_buf, sizeof(p) + 2*ts->ss_dur*sizeof(uint64_t), NULL, SK_F_COPY);
+
+               free(ss_buf);
+       }
+       else
+               fio_net_queue_cmd(FIO_NET_CMD_TS, &p, sizeof(p), NULL, SK_F_COPY);
 }
 
 void fio_server_send_gs(struct group_run_stats *rs)
@@ -1625,58 +1676,206 @@ void fio_server_send_du(void)
        }
 }
 
-static int fio_append_iolog_gz(struct sk_entry *first, struct io_log *log)
-{
-       int ret = 0;
 #ifdef CONFIG_ZLIB
+
+static inline void __fio_net_prep_tail(z_stream *stream, void *out_pdu,
+                                       struct sk_entry **last_entry,
+                                       struct sk_entry *first)
+{
+       unsigned int this_len = FIO_SERVER_MAX_FRAGMENT_PDU - stream->avail_out;
+
+       *last_entry = fio_net_prep_cmd(FIO_NET_CMD_IOLOG, out_pdu, this_len,
+                                NULL, SK_F_VEC | SK_F_INLINE | SK_F_FREE);
+       flist_add_tail(&(*last_entry)->list, &first->next);
+
+}
+
+/*
+ * Deflates the next input given, creating as many new packets in the
+ * linked list as necessary.
+ */
+static int __deflate_pdu_buffer(void *next_in, unsigned int next_sz, void **out_pdu,
+                               struct sk_entry **last_entry, z_stream *stream,
+                               struct sk_entry *first)
+{
+       int ret;
+
+       stream->next_in = next_in;
+       stream->avail_in = next_sz;
+       do {
+               if (! stream->avail_out) {
+
+                       __fio_net_prep_tail(stream, *out_pdu, last_entry, first);
+
+                       *out_pdu = malloc(FIO_SERVER_MAX_FRAGMENT_PDU);
+
+                       stream->avail_out = FIO_SERVER_MAX_FRAGMENT_PDU;
+                       stream->next_out = *out_pdu;
+               }
+
+               ret = deflate(stream, Z_BLOCK);
+
+               if (ret < 0) {
+                       free(*out_pdu);
+                       return 1;
+               }
+       } while (stream->avail_in);
+
+       return 0;
+}
+
+static int __fio_append_iolog_gz_hist(struct sk_entry *first, struct io_log *log,
+                                     struct io_logs *cur_log, z_stream *stream)
+{
        struct sk_entry *entry;
-       z_stream stream;
        void *out_pdu;
+       int ret, i, j;
+       int sample_sz = log_entry_sz(log);
 
-       /*
-        * Dirty - since the log is potentially huge, compress it into
-        * FIO_SERVER_MAX_FRAGMENT_PDU chunks and let the receiving
-        * side defragment it.
-        */
        out_pdu = malloc(FIO_SERVER_MAX_FRAGMENT_PDU);
+       stream->avail_out = FIO_SERVER_MAX_FRAGMENT_PDU;
+       stream->next_out = out_pdu;
+
+       for (i = 0; i < cur_log->nr_samples; i++) {
+               struct io_sample *s;
+               struct io_u_plat_entry *cur_plat_entry, *prev_plat_entry;
+               unsigned int *cur_plat, *prev_plat;
+
+               s = get_sample(log, cur_log, i);
+               ret = __deflate_pdu_buffer(s, sample_sz, &out_pdu, &entry, stream, first);
+               if (ret)
+                       return ret;
+
+               /* Do the subtraction on server side so that client doesn't have to
+                * reconstruct our linked list from packets.
+                */
+               cur_plat_entry  = s->data.plat_entry;
+               prev_plat_entry = flist_first_entry(&cur_plat_entry->list, struct io_u_plat_entry, list);
+               cur_plat  = cur_plat_entry->io_u_plat;
+               prev_plat = prev_plat_entry->io_u_plat;
+
+               for (j = 0; j < FIO_IO_U_PLAT_NR; j++) {
+                       cur_plat[j] -= prev_plat[j];
+               }
+
+               flist_del(&prev_plat_entry->list);
+               free(prev_plat_entry);
+
+               ret = __deflate_pdu_buffer(cur_plat_entry, sizeof(*cur_plat_entry),
+                                          &out_pdu, &entry, stream, first);
+
+               if (ret)
+                       return ret;
+       }
+
+       __fio_net_prep_tail(stream, out_pdu, &entry, first);
 
+       return 0;
+}
+
+static int __fio_append_iolog_gz(struct sk_entry *first, struct io_log *log,
+                                struct io_logs *cur_log, z_stream *stream)
+{
+       unsigned int this_len;
+       void *out_pdu;
+       int ret;
+
+       if (log->log_type == IO_LOG_TYPE_HIST)
+               return __fio_append_iolog_gz_hist(first, log, cur_log, stream);
+
+       stream->next_in = (void *) cur_log->log;
+       stream->avail_in = cur_log->nr_samples * log_entry_sz(log);
+
+       do {
+               struct sk_entry *entry;
+
+               /*
+                * Dirty - since the log is potentially huge, compress it into
+                * FIO_SERVER_MAX_FRAGMENT_PDU chunks and let the receiving
+                * side defragment it.
+                */
+               out_pdu = malloc(FIO_SERVER_MAX_FRAGMENT_PDU);
+
+               stream->avail_out = FIO_SERVER_MAX_FRAGMENT_PDU;
+               stream->next_out = out_pdu;
+               ret = deflate(stream, Z_BLOCK);
+               /* may be Z_OK, or Z_STREAM_END */
+               if (ret < 0) {
+                       free(out_pdu);
+                       return 1;
+               }
+
+               this_len = FIO_SERVER_MAX_FRAGMENT_PDU - stream->avail_out;
+
+               entry = fio_net_prep_cmd(FIO_NET_CMD_IOLOG, out_pdu, this_len,
+                                        NULL, SK_F_VEC | SK_F_INLINE | SK_F_FREE);
+               flist_add_tail(&entry->list, &first->next);
+       } while (stream->avail_in);
+
+       return 0;
+}
+
+static int fio_append_iolog_gz(struct sk_entry *first, struct io_log *log)
+{
+       int ret = 0;
+       z_stream stream;
+
+       memset(&stream, 0, sizeof(stream));
        stream.zalloc = Z_NULL;
        stream.zfree = Z_NULL;
        stream.opaque = Z_NULL;
 
-       if (deflateInit(&stream, Z_DEFAULT_COMPRESSION) != Z_OK) {
-               ret = 1;
-               goto err;
+       if (deflateInit(&stream, Z_DEFAULT_COMPRESSION) != Z_OK)
+               return 1;
+
+       while (!flist_empty(&log->io_logs)) {
+               struct io_logs *cur_log;
+
+               cur_log = flist_first_entry(&log->io_logs, struct io_logs, list);
+               flist_del_init(&cur_log->list);
+
+               ret = __fio_append_iolog_gz(first, log, cur_log, &stream);
+               if (ret)
+                       break;
        }
 
-       stream.next_in = (void *) log->log;
-       stream.avail_in = log->nr_samples * log_entry_sz(log);
+       ret = deflate(&stream, Z_FINISH);
 
-       do {
+       while (ret != Z_STREAM_END) {
+               struct sk_entry *entry;
                unsigned int this_len;
+               void *out_pdu;
 
+               out_pdu = malloc(FIO_SERVER_MAX_FRAGMENT_PDU);
                stream.avail_out = FIO_SERVER_MAX_FRAGMENT_PDU;
                stream.next_out = out_pdu;
+
                ret = deflate(&stream, Z_FINISH);
                /* may be Z_OK, or Z_STREAM_END */
-               if (ret < 0)
-                       goto err_zlib;
+               if (ret < 0) {
+                       free(out_pdu);
+                       break;
+               }
 
                this_len = FIO_SERVER_MAX_FRAGMENT_PDU - stream.avail_out;
 
                entry = fio_net_prep_cmd(FIO_NET_CMD_IOLOG, out_pdu, this_len,
-                                               NULL, SK_F_VEC | SK_F_INLINE | SK_F_FREE);
-               out_pdu = NULL;
+                                        NULL, SK_F_VEC | SK_F_INLINE | SK_F_FREE);
                flist_add_tail(&entry->list, &first->next);
-       } while (stream.avail_in);
+       } while (ret != Z_STREAM_END);
 
-err_zlib:
-       deflateEnd(&stream);
-err:
-       free(out_pdu);
-#endif
-       return ret;
+       ret = deflateEnd(&stream);
+       if (ret == Z_OK)
+               return 0;
+
+       return 1;
 }
+#else
+static int fio_append_iolog_gz(struct sk_entry *first, struct io_log *log)
+{
+       return 1;
+}
+#endif
 
 static int fio_append_gz_chunks(struct sk_entry *first, struct io_log *log)
 {
@@ -1700,11 +1899,21 @@ static int fio_append_gz_chunks(struct sk_entry *first, struct io_log *log)
 static int fio_append_text_log(struct sk_entry *first, struct io_log *log)
 {
        struct sk_entry *entry;
-       size_t size = log->nr_samples * log_entry_sz(log);
 
-       entry = fio_net_prep_cmd(FIO_NET_CMD_IOLOG, log->log, size,
-                                       NULL, SK_F_VEC | SK_F_INLINE);
-       flist_add_tail(&entry->list, &first->next);
+       while (!flist_empty(&log->io_logs)) {
+               struct io_logs *cur_log;
+               size_t size;
+
+               cur_log = flist_first_entry(&log->io_logs, struct io_logs, list);
+               flist_del_init(&cur_log->list);
+
+               size = cur_log->nr_samples * log_entry_sz(log);
+
+               entry = fio_net_prep_cmd(FIO_NET_CMD_IOLOG, cur_log->log, size,
+                                               NULL, SK_F_VEC | SK_F_INLINE);
+               flist_add_tail(&entry->list, &first->next);
+       }
+
        return 0;
 }
 
@@ -1712,11 +1921,13 @@ int fio_send_iolog(struct thread_data *td, struct io_log *log, const char *name)
 {
        struct cmd_iolog_pdu pdu;
        struct sk_entry *first;
-       int i, ret = 0;
+       struct flist_head *entry;
+       int ret = 0;
 
-       pdu.nr_samples = cpu_to_le64(log->nr_samples);
+       pdu.nr_samples = cpu_to_le64(iolog_nr_samples(log));
        pdu.thread_number = cpu_to_le32(td->thread_number);
        pdu.log_type = cpu_to_le32(log->log_type);
+       pdu.log_hist_coarseness = cpu_to_le32(log->hist_coarseness);
 
        if (!flist_empty(&log->chunk_list))
                pdu.compressed = __cpu_to_le32(STORE_COMPRESSED);
@@ -1732,18 +1943,25 @@ int fio_send_iolog(struct thread_data *td, struct io_log *log, const char *name)
         * We can't do this for a pre-compressed log, but for that case,
         * log->nr_samples is zero anyway.
         */
-       for (i = 0; i < log->nr_samples; i++) {
-               struct io_sample *s = get_sample(log, i);
+       flist_for_each(entry, &log->io_logs) {
+               struct io_logs *cur_log;
+               int i;
+
+               cur_log = flist_entry(entry, struct io_logs, list);
 
-               s->time         = cpu_to_le64(s->time);
-               s->val          = cpu_to_le64(s->val);
-               s->__ddir       = cpu_to_le32(s->__ddir);
-               s->bs           = cpu_to_le32(s->bs);
+               for (i = 0; i < cur_log->nr_samples; i++) {
+                       struct io_sample *s = get_sample(log, cur_log, i);
 
-               if (log->log_offset) {
-                       struct io_sample_offset *so = (void *) s;
+                       s->time         = cpu_to_le64(s->time);
+                       s->data.val     = cpu_to_le64(s->data.val);
+                       s->__ddir       = cpu_to_le32(s->__ddir);
+                       s->bs           = cpu_to_le32(s->bs);
 
-                       so->offset = cpu_to_le64(so->offset);
+                       if (log->log_offset) {
+                               struct io_sample_offset *so = (void *) s;
+
+                               so->offset = cpu_to_le64(so->offset);
+                       }
                }
        }
 
@@ -1788,11 +2006,11 @@ void fio_server_send_start(struct thread_data *td)
 
        assert(sk_out->sk != -1);
 
-       fio_net_queue_cmd(FIO_NET_CMD_SERVER_START, NULL, 0, 0, SK_F_SIMPLE);
+       fio_net_queue_cmd(FIO_NET_CMD_SERVER_START, NULL, 0, NULL, SK_F_SIMPLE);
 }
 
 int fio_server_get_verify_state(const char *name, int threadnumber,
-                               void **datap, int *version)
+                               void **datap)
 {
        struct thread_io_list *s;
        struct cmd_sendfile out;
@@ -1804,10 +2022,8 @@ int fio_server_get_verify_state(const char *name, int threadnumber,
        dprint(FD_NET, "server: request verify state\n");
 
        rep = smalloc(sizeof(*rep));
-       if (!rep) {
-               log_err("fio: smalloc pool too small\n");
+       if (!rep)
                return ENOMEM;
-       }
 
        __fio_mutex_init(&rep->lock, FIO_MUTEX_LOCKED);
        rep->data = NULL;
@@ -1844,7 +2060,7 @@ fail:
         * the header, and the thread_io_list checksum
         */
        s = rep->data + sizeof(struct verify_state_hdr);
-       if (verify_state_hdr(rep->data, s, version)) {
+       if (verify_state_hdr(rep->data, s)) {
                ret = EILSEQ;
                goto fail;
        }
@@ -1889,11 +2105,10 @@ static int fio_init_server_ip(void)
                return -1;
        }
 #ifdef SO_REUSEPORT
-       if (setsockopt(sk, SOL_SOCKET, SO_REUSEPORT, &opt, sizeof(opt)) < 0) {
-               log_err("fio: setsockopt(REUSEPORT): %s\n", strerror(errno));
-               close(sk);
-               return -1;
-       }
+       /*
+        * Not fatal if fails, so just ignore it if that happens
+        */
+       setsockopt(sk, SOL_SOCKET, SO_REUSEPORT, &opt, sizeof(opt));
 #endif
 
        if (use_ipv6) {
@@ -2186,16 +2401,25 @@ static void set_sig_handlers(void)
        sigaction(SIGINT, &act, NULL);
 }
 
-static int fio_server(void)
+void fio_server_destroy_sk_key(void)
 {
-       int sk, ret;
+       pthread_key_delete(sk_out_key);
+}
 
+int fio_server_create_sk_key(void)
+{
        if (pthread_key_create(&sk_out_key, NULL)) {
                log_err("fio: can't create sk_out backend key\n");
-               return -1;
+               return 1;
        }
 
        pthread_setspecific(sk_out_key, NULL);
+       return 0;
+}
+
+static int fio_server(void)
+{
+       int sk, ret;
 
        dprint(FD_NET, "starting server\n");
 
@@ -2303,7 +2527,7 @@ int fio_start_server(char *pidfile)
 
        pid = fork();
        if (pid < 0) {
-               log_err("fio: failed server fork: %s", strerror(errno));
+               log_err("fio: failed server fork: %s\n", strerror(errno));
                free(pidfile);
                return -1;
        } else if (pid) {