nginx 1.0.7 *) Change: now if total size of all ranges is greater than source response size, then nginx disables ranges and returns just the source response. *) Feature: the "max_ranges" directive. *) Feature: the module ngx_http_mp4_module. *) Feature: the "worker_aio_requests" directive. *) Bugfix: if nginx was built --with-file-aio it could not be run on Linux kernel which did not support AIO. *) Bugfix: in Linux AIO error processing. Thanks to Hagai Avrahami. *) Bugfix: in Linux AIO combined with open_file_cache. *) Bugfix: open_file_cache did not update file info on retest if file was not atomically changed. *) Bugfix: reduced memory consumption for long-lived requests. *) Bugfix: in the "proxy/fastcgi/scgi/uwsgi_ignore_client_abort" directives. *) Bugfix: nginx could not be built on MacOSX 10.7. *) Bugfix: in the "proxy/fastcgi/scgi/uwsgi_ignore_client_abort" directives. *) Bugfix: request body might be processed incorrectly if client used pipelining. *) Bugfix: in the "request_body_in_single_buf" directive. *) Bugfix: in "proxy_set_body" and "proxy_pass_request_body" directives if SSL connection to backend was used. *) Bugfix: nginx hogged CPU if all servers in an upstream were marked as "down". *) Bugfix: a segmentation fault might occur during reconfiguration if ssl_session_cache was defined but not used in previous configuration. *) Bugfix: a segmentation fault might occur in a worker process if many backup servers were used in an upstream.

/*
 * Copyright (C) Igor Sysoev
 */


#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_event.h>


ssize_t
ngx_aio_read_chain(ngx_connection_t *c, ngx_chain_t *cl)
{
    int           n;
    u_char       *buf, *prev;
    size_t        size;
    ssize_t       total;

    if (c->read->pending_eof) {
        c->read->ready = 0;
        return 0;
    }

    total = 0;

    while (cl) {

        /* we can post the single aio operation only */

        if (!c->read->ready) {
            return total ? total : NGX_AGAIN;
        }

        buf = cl->buf->last;
        prev = cl->buf->last;
        size = 0;

        /* coalesce the neighbouring bufs */

        while (cl && prev == cl->buf->last) {
            size += cl->buf->end - cl->buf->last;
            prev = cl->buf->end;
            cl = cl->next;
        }

        n = ngx_aio_read(c, buf, size);

        ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, "aio_read: %d", n);

        if (n == NGX_AGAIN) {
            return total ? total : NGX_AGAIN;
        }

        if (n == NGX_ERROR) {
            return NGX_ERROR;
        }

        if (n == 0) {
            c->read->pending_eof = 1;
            if (total) {
                c->read->eof = 0;
                c->read->ready = 1;
            }
            return total;
        }

        if (n > 0) {
            total += n;
        }

        ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0,
                       "aio_read total: %d", total);
    }

    return total ? total : NGX_AGAIN;
}