nginx 1.0.12 *) Feature: the "TLSv1.1" and "TLSv1.2" parameters of the "ssl_protocols" directive. *) Feature: the "if" SSI command supports captures in regular expressions. *) Bugfix: the "if" SSI command did not work inside the "block" command. *) Bugfix: in AIO error handling on FreeBSD. *) Bugfix: in the OpenSSL library initialization. *) Bugfix: the "worker_cpu_affinity" directive might not work. *) Bugfix: the "limit_conn_log_level" and "limit_req_log_level" directives might not work. *) Bugfix: the "read_ahead" directive might not work combined with "try_files" and "open_file_cache". *) Bugfix: the "proxy_cache_use_stale" directive with "error" parameter did not return answer from cache if there were no live upstreams. *) Bugfix: a segmentation fault might occur in a worker process if small time was used in the "inactive" parameter of the "proxy_cache_path" directive. *) Bugfix: responses from cache might hang. *) Bugfix: in error handling while connecting to a backend. Thanks to Piotr Sikora. *) Bugfix: in the "epoll" event method. Thanks to Yichun Zhang. *) Bugfix: the $sent_http_cache_control variable might contain a wrong value if the "expires" directive was used. Thanks to Yichun Zhang. *) Bugfix: the "limit_rate" directive did not allow to use full throughput, even if limit value was very high. *) Bugfix: the "sendfile_max_chunk" directive did not work, if the "limit_rate" directive was used. *) Bugfix: nginx could not be built on Solaris; the bug had appeared in 1.0.11. *) Bugfix: in the ngx_http_scgi_module. *) Bugfix: in the ngx_http_mp4_module.

/*
 * Copyright (C) Igor Sysoev
 * Copyright (C) Nginx, Inc.
 */


#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;
}