Initial version.

src/nxt_freebsd_sendfile.c

@@ -0,0 +1,145 @@
+
+/*
+ * Copyright (C) Igor Sysoev
+ * Copyright (C) NGINX, Inc.
+ */
+
+#include <nxt_main.h>
+
+
+/*
+ * sendfile() has been introduced in FreeBSD 3.1,
+ * however, early implementation had various bugs.
+ * This code supports FreeBSD 5.0 implementation.
+ */
+
+#ifdef NXT_TEST_BUILD_FREEBSD_SENDFILE
+
+ssize_t nxt_freebsd_event_conn_io_sendfile(nxt_event_conn_t *c, nxt_buf_t *b,
+    size_t limit);
+
+static int nxt_sys_sendfile(int fd, int s, off_t offset, size_t nbytes,
+    struct sf_hdtr *hdtr, off_t *sbytes, int flags)
+{
+    return -1;
+}
+
+#else
+#define nxt_sys_sendfile  sendfile
+#endif
+
+
+ssize_t
+nxt_freebsd_event_conn_io_sendfile(nxt_event_conn_t *c, nxt_buf_t *b,
+    size_t limit)
+{
+    size_t                  file_size;
+    ssize_t                 n;
+    nxt_buf_t               *fb;
+    nxt_err_t               err;
+    nxt_off_t               sent;
+    nxt_uint_t              nhd, ntr;
+    struct iovec            hd[NXT_IOBUF_MAX], tr[NXT_IOBUF_MAX];
+    struct sf_hdtr          hdtr, *ht;
+    nxt_sendbuf_coalesce_t  sb;
+
+    sb.buf = b;
+    sb.iobuf = hd;
+    sb.nmax = NXT_IOBUF_MAX;
+    sb.sync = 0;
+    sb.size = 0;
+    sb.limit = limit;
+
+    nhd = nxt_sendbuf_mem_coalesce(&sb);
+
+    if (nhd == 0 && sb.sync) {
+        return 0;
+    }
+
+    if (sb.buf == NULL || !nxt_buf_is_file(sb.buf)) {
+        return nxt_event_conn_io_writev(c, hd, nhd);
+    }
+
+    fb = sb.buf;
+
+    file_size = nxt_sendbuf_file_coalesce(&sb);
+
+    if (file_size == 0) {
+        return nxt_event_conn_io_writev(c, hd, nhd);
+    }
+
+    sb.iobuf = tr;
+
+    ntr = nxt_sendbuf_mem_coalesce(&sb);
+
+    /*
+     * Disposal of surplus kernel operations
+     * if there are no headers or trailers.
+     */
+
+    ht = NULL;
+    nxt_memzero(&hdtr, sizeof(struct sf_hdtr));
+
+    if (nhd != 0) {
+        ht = &hdtr;
+        hdtr.headers = hd;
+        hdtr.hdr_cnt = nhd;
+    }
+
+    if (ntr != 0) {
+        ht = &hdtr;
+        hdtr.trailers = tr;
+        hdtr.trl_cnt = ntr;
+    }
+
+    nxt_log_debug(c->socket.log, "sendfile(%FD, %d, @%O, %uz) hd:%ui tr:%ui",
+                  fb->file->fd, c->socket.fd, fb->file_pos, file_size,
+                  nhd, ntr);
+
+    sent = 0;
+    n = nxt_sys_sendfile(fb->file->fd, c->socket.fd, fb->file_pos,
+                         file_size, ht, &sent, 0);
+
+    err = (n == -1) ? nxt_errno : 0;
+
+    nxt_log_debug(c->socket.log, "sendfile(): %d sent:%O", n, sent);
+
+    if (n == -1) {
+        switch (err) {
+
+        case NXT_EAGAIN:
+            c->socket.write_ready = 0;
+            break;
+
+        case NXT_EINTR:
+            break;
+
+        default:
+            c->socket.error = err;
+            nxt_log_error(nxt_socket_error_level(err, c->socket.log_error),
+                          c->socket.log, "sendfile(%FD, %d, %O, %uz) failed "
+                          "%E \"%FN\" hd:%ui tr:%ui", fb->file->fd,
+                          c->socket.fd, fb->file_pos, file_size,
+                          err, fb->file->name, nhd, ntr);
+
+            return NXT_ERROR;
+        }
+
+        nxt_log_debug(c->socket.log, "sendfile() %E", err);
+
+        return sent;
+
+    } else if (sent == 0) {
+        nxt_log_error(NXT_LOG_ERR, c->socket.log,
+                      "file \"%FN\" was truncated while sendfile()",
+                      fb->file->name);
+
+        return NXT_ERROR;
+    }
+
+    if (sent < (nxt_off_t) sb.size) {
+        c->socket.write_ready = 0;
+    }
+
+    return sent;
+}