Initial version.

src/nxt_aix_send_file.c

@@ -0,0 +1,128 @@
+
+/*
+ * Copyright (C) Igor Sysoev
+ * Copyright (C) NGINX, Inc.
+ */
+
+#include <nxt_main.h>
+
+
+/* send_file() has been introduced in AIX 4.3.2 */
+
+ssize_t nxt_aix_event_conn_io_send_file(nxt_event_conn_t *c, nxt_buf_t *b,
+    size_t limit);
+
+
+ssize_t
+nxt_aix_event_conn_io_send_file(nxt_event_conn_t *c, nxt_buf_t *b, size_t limit)
+{
+    ssize_t                 n;
+    nxt_buf_t               *fb;
+    nxt_err_t               err;
+    nxt_off_t               file_size, sent;
+    nxt_uint_t              nhd, ntr;
+    struct iovec            hd[NXT_IOBUF_MAX], tr;
+    struct sf_parms         sfp;
+    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 (nhd > 1 || 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;
+    sb.nmax = 1;
+
+    ntr = nxt_sendbuf_mem_coalesce(&sb);
+
+    nxt_memzero(&sfp, sizeof(struct sf_parms));
+
+    if (nhd != 0) {
+        sfp.header_data = hd[0].iov_base;
+        sfp.header_length = hd[0].iov_len;
+    }
+
+    sfp.file_descriptor = fb->file->fd;
+    sfp.file_offset = fb->file_pos;
+    sfp.file_bytes = file_size;
+
+    if (ntr != 0) {
+        sfp.trailer_data = tr.iov_base;
+        sfp.trailer_length = tr.iov_len;
+    }
+
+    nxt_log_debug(c->socket.log, "send_file(%d) fd:%FD @%O:%O hd:%ui tr:%ui",
+                  c->socket.fd, fb->file->fd, fb->file_pos, file_size,
+                  nhd, ntr);
+
+    n = send_file(&c->socket.fd, &sfp, 0);
+
+    err = (n == -1) ? nxt_errno : 0;
+    sent = sfp.bytes_sent;
+
+    nxt_log_debug(c->socket.log, "send_file(%d): %d sent:%O",
+                  c->socket.fd, n, sent);
+
+    /*
+     * -1  an error has occurred, errno contains the error code;
+     *  0  the command has completed successfully;
+     *  1  the command was completed partially, some data has been
+     *     transmitted but the command has to return for some reason,
+     *     for example, the command was interrupted by signals.
+     */
+    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, "send_file(%d) failed %E \"%FN\" "
+                          "fd:%FD @%O:%O hd:%ui tr:%ui", c->socket.fd, err,
+                          fb->file->name, fb->file->fd, fb->file_pos,
+                          file_size, nhd, ntr);
+
+            return NXT_ERROR;
+        }
+
+        nxt_log_debug(c->socket.log, "sendfile() %E", err);
+
+        return sent;
+    }
+
+    if (n == 1) {
+        return sent;
+    }
+
+    if (sent < (nxt_off_t) sb.size) {
+        c->socket.write_ready = 0;
+    }
+
+    return sent;
+}