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Various fixes for ggatec and ggated
Dynamically size buffers in ggatec. Instead of static size on the stack. Add flush support. Submitted by: Johannes Totz <jo@bruelltuete.com> MFC after: 2 weeks Reviewed by: asomers Differential Revision: https://reviews.freebsd.org/D31722
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7776d3ccd1
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6226477a46
@ -74,6 +74,7 @@ static int sendfd, recvfd;
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static uint32_t token;
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static pthread_t sendtd, recvtd;
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static int reconnect;
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static int initialbuffersize = 131072;
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static void
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usage(void)
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@ -94,18 +95,25 @@ send_thread(void *arg __unused)
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{
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struct g_gate_ctl_io ggio;
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struct g_gate_hdr hdr;
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char buf[MAXPHYS];
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ssize_t data;
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size_t buf_capacity;
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ssize_t numbytesprocd;
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int error;
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char *newbuf;
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g_gate_log(LOG_NOTICE, "%s: started!", __func__);
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buf_capacity = initialbuffersize;
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ggio.gctl_version = G_GATE_VERSION;
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ggio.gctl_unit = unit;
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ggio.gctl_data = buf;
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ggio.gctl_data = malloc(buf_capacity);
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if (ggio.gctl_data == NULL) {
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g_gate_log(LOG_ERR, "%s: Cannot alloc buffer.", __func__);
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pthread_exit(NULL);
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}
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for (;;) {
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ggio.gctl_length = sizeof(buf);
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ggio.gctl_length = buf_capacity;
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ggio.gctl_error = 0;
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g_gate_ioctl(G_GATE_CMD_START, &ggio);
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error = ggio.gctl_error;
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@ -118,17 +126,22 @@ send_thread(void *arg __unused)
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/* Exit gracefully. */
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g_gate_close_device();
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exit(EXIT_SUCCESS);
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#if 0
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case ENOMEM:
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{
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/* Buffer too small. */
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ggio.gctl_data = realloc(ggio.gctl_data,
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g_gate_log(LOG_DEBUG, "buffer too small. new size: %u",
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ggio.gctl_length);
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if (ggio.gctl_data != NULL) {
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bsize = ggio.gctl_length;
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goto once_again;
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newbuf = malloc(ggio.gctl_length);
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if (newbuf != NULL) {
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free(ggio.gctl_data);
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ggio.gctl_data = newbuf;
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buf_capacity = ggio.gctl_length;
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continue;
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}
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/* FALLTHROUGH */
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#endif
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}
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case ENXIO:
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default:
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g_gate_xlog("ioctl(/dev/%s): %s.", G_GATE_CTL_NAME,
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@ -145,16 +158,12 @@ send_thread(void *arg __unused)
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case BIO_WRITE:
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hdr.gh_cmd = GGATE_CMD_WRITE;
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break;
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case BIO_FLUSH:
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hdr.gh_cmd = GGATE_CMD_FLUSH;
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break;
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default:
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g_gate_log(LOG_NOTICE, "Unknown gctl_cmd: %i", ggio.gctl_cmd);
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ggio.gctl_error = EOPNOTSUPP;
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g_gate_ioctl(G_GATE_CMD_DONE, &ggio);
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continue;
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}
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/* Don't send requests for more data than we can handle the response for! */
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if (ggio.gctl_length > MAXPHYS) {
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g_gate_log(LOG_ERR, "Request too big: %zd", ggio.gctl_length);
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g_gate_log(LOG_NOTICE, "Unknown gctl_cmd: %i",
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ggio.gctl_cmd);
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ggio.gctl_error = EOPNOTSUPP;
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g_gate_ioctl(G_GATE_CMD_DONE, &ggio);
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continue;
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@ -166,12 +175,12 @@ send_thread(void *arg __unused)
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hdr.gh_error = 0;
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g_gate_swap2n_hdr(&hdr);
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data = g_gate_send(sendfd, &hdr, sizeof(hdr), MSG_NOSIGNAL);
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numbytesprocd = g_gate_send(sendfd, &hdr, sizeof(hdr), MSG_NOSIGNAL);
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g_gate_log(LOG_DEBUG, "Sent hdr packet.");
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g_gate_swap2h_hdr(&hdr);
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if (reconnect)
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break;
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if (data != sizeof(hdr)) {
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if (numbytesprocd != sizeof(hdr)) {
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g_gate_log(LOG_ERR, "Lost connection 1.");
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reconnect = 1;
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pthread_kill(recvtd, SIGUSR1);
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@ -179,18 +188,19 @@ send_thread(void *arg __unused)
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}
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if (hdr.gh_cmd == GGATE_CMD_WRITE) {
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data = g_gate_send(sendfd, ggio.gctl_data,
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numbytesprocd = g_gate_send(sendfd, ggio.gctl_data,
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ggio.gctl_length, MSG_NOSIGNAL);
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if (reconnect)
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break;
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if (data != ggio.gctl_length) {
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g_gate_log(LOG_ERR, "Lost connection 2 (%zd != %zd).", data, (ssize_t)ggio.gctl_length);
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if (numbytesprocd != ggio.gctl_length) {
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g_gate_log(LOG_ERR, "Lost connection 2 (%zd != %zd).",
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numbytesprocd, (ssize_t)ggio.gctl_length);
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reconnect = 1;
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pthread_kill(recvtd, SIGUSR1);
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break;
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}
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g_gate_log(LOG_DEBUG, "Sent %zd bytes (offset=%"
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PRIu64 ", length=%" PRIu32 ").", data,
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PRIu64 ", length=%" PRIu32 ").", numbytesprocd,
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hdr.gh_offset, hdr.gh_length);
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}
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}
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@ -203,22 +213,29 @@ recv_thread(void *arg __unused)
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{
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struct g_gate_ctl_io ggio;
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struct g_gate_hdr hdr;
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char buf[MAXPHYS];
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ssize_t data;
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ssize_t buf_capacity;
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ssize_t numbytesprocd;
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char *newbuf;
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g_gate_log(LOG_NOTICE, "%s: started!", __func__);
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buf_capacity = initialbuffersize;
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ggio.gctl_version = G_GATE_VERSION;
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ggio.gctl_unit = unit;
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ggio.gctl_data = buf;
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ggio.gctl_data = malloc(buf_capacity);
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if (ggio.gctl_data == NULL) {
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g_gate_log(LOG_ERR, "%s: Cannot alloc buffer.", __func__);
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pthread_exit(NULL);
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}
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for (;;) {
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data = g_gate_recv(recvfd, &hdr, sizeof(hdr), MSG_WAITALL);
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numbytesprocd = g_gate_recv(recvfd, &hdr, sizeof(hdr), MSG_WAITALL);
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if (reconnect)
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break;
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g_gate_swap2h_hdr(&hdr);
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if (data != sizeof(hdr)) {
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if (data == -1 && errno == EAGAIN)
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if (numbytesprocd != sizeof(hdr)) {
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if (numbytesprocd == -1 && errno == EAGAIN)
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continue;
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g_gate_log(LOG_ERR, "Lost connection 3.");
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reconnect = 1;
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@ -233,26 +250,33 @@ recv_thread(void *arg __unused)
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ggio.gctl_length = hdr.gh_length;
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ggio.gctl_error = hdr.gh_error;
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/* Do not overflow our buffer if there is a bogus response. */
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if (ggio.gctl_length > (off_t) sizeof(buf)) {
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g_gate_log(LOG_ERR, "Received too big response: %zd", ggio.gctl_length);
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break;
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if (ggio.gctl_length > buf_capacity) {
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newbuf = malloc(ggio.gctl_length);
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if (newbuf != NULL) {
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free(ggio.gctl_data);
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ggio.gctl_data = newbuf;
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buf_capacity = ggio.gctl_length;
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} else {
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g_gate_log(LOG_ERR, "Received too big response: %zd",
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ggio.gctl_length);
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break;
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}
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}
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if (ggio.gctl_error == 0 && ggio.gctl_cmd == GGATE_CMD_READ) {
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data = g_gate_recv(recvfd, ggio.gctl_data,
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numbytesprocd = g_gate_recv(recvfd, ggio.gctl_data,
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ggio.gctl_length, MSG_WAITALL);
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if (reconnect)
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break;
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g_gate_log(LOG_DEBUG, "Received data packet.");
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if (data != ggio.gctl_length) {
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if (numbytesprocd != ggio.gctl_length) {
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g_gate_log(LOG_ERR, "Lost connection 4.");
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reconnect = 1;
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pthread_kill(sendtd, SIGUSR1);
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break;
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}
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g_gate_log(LOG_DEBUG, "Received %d bytes (offset=%"
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PRIu64 ", length=%" PRIu32 ").", data,
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PRIu64 ", length=%" PRIu32 ").", numbytesprocd,
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hdr.gh_offset, hdr.gh_length);
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}
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@ -509,6 +533,16 @@ g_gatec_rescue(void)
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g_gatec_loop();
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}
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static void
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init_initial_buffer_size()
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{
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int value;
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size_t intsize;
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intsize = sizeof(initialbuffersize);
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if (sysctlbyname("kern.maxphys", &value, &intsize, NULL, 0) == 0)
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initialbuffersize = value;
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}
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int
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main(int argc, char *argv[])
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{
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@ -624,6 +658,8 @@ main(int argc, char *argv[])
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argc -= optind;
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argv += optind;
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init_initial_buffer_size();
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switch (action) {
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case CREATE:
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if (argc != 2)
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@ -726,7 +726,6 @@ disk_thread(void *arg)
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/*
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* Check the request.
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*/
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assert(req->r_cmd == GGATE_CMD_READ || req->r_cmd == GGATE_CMD_WRITE);
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assert(req->r_offset + req->r_length <= (uintmax_t)conn->c_mediasize);
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assert((req->r_offset % conn->c_sectorsize) == 0);
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assert((req->r_length % conn->c_sectorsize) == 0);
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@ -750,6 +749,19 @@ disk_thread(void *arg)
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free(req->r_data);
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req->r_data = NULL;
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break;
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case GGATE_CMD_FLUSH:
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data = fsync(fd);
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if (data != 0)
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req->r_error = errno;
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break;
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default:
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g_gate_log(LOG_DEBUG, "Unsupported request: %i", req->r_cmd);
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req->r_error = EOPNOTSUPP;
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if (req->r_data != NULL) {
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free(req->r_data);
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req->r_data = NULL;
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}
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break;
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}
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if (data != (ssize_t)req->r_length) {
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/* Report short reads/writes as I/O errors. */
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@ -57,6 +57,7 @@
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#define GGATE_CMD_READ 0
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#define GGATE_CMD_WRITE 1
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#define GGATE_CMD_FLUSH 3
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extern int g_gate_devfd;
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extern int g_gate_verbose;
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