view src/os/unix/ngx_solaris_sendfilev_chain.c @ 34:aab2ea7c0458 NGINX_0_1_17

nginx 0.1.17 *) Change: the ngx_http_rewrite_module was rewritten from the scratch. Now it is possible to redirect, to return the error codes, to check the variables and referrers. The directives can be used inside locations. The redirect directive was canceled. *) Feature: the ngx_http_geo_module. *) Feature: the proxy_set_x_var and fastcgi_set_var directives. *) Bugfix: the location configuration with "=" modifier may be used in another location. *) Bugfix: the correct content type was set only for requests that use small caps letters in extension. *) Bugfix: if the proxy_pass or fastcgi_pass directives were set in the location, and access was denied, and the error was redirected to a static page, then the segmentation fault occurred. *) Bugfix: if in a proxied "Location" header was a relative URL, then a host name and a slash were added to them; bug appeared in 0.1.14. *) Bugfix: the system error message was not logged on Linux.
author Igor Sysoev <http://sysoev.ru>
date Thu, 03 Feb 2005 00:00:00 +0300
parents 45fe5b98a9de
children 72eb30262aac
line wrap: on
line source


/*
 * Copyright (C) Igor Sysoev
 */


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


#if (NGX_TEST_BUILD_SOLARIS_SENDFILEV)

/* Solaris declarations */

typedef struct sendfilevec {
    int     sfv_fd;
    u_int   sfv_flag;
    off_t   sfv_off;
    size_t  sfv_len;
} sendfilevec_t;

#define SFV_FD_SELF  -2

static ssize_t sendfilev(int fd, const struct sendfilevec *vec,
                         int sfvcnt, size_t *xferred)
{
    return -1;
}

#endif


#define NGX_SENDFILEVECS   16


ngx_chain_t *ngx_solaris_sendfilev_chain(ngx_connection_t *c, ngx_chain_t *in,
                                         off_t limit)
{
    int             fd;
    u_char         *prev;
    off_t           size, send, prev_send, aligned, fprev;
    size_t          sent;
    ssize_t         n;
    ngx_int_t       eintr, complete;
    ngx_err_t       err;
    sendfilevec_t  *sfv, sfvs[NGX_SENDFILEVECS];
    ngx_array_t     vec;
    ngx_event_t    *wev;
    ngx_chain_t    *cl, *tail;

    wev = c->write;

    if (!wev->ready) {
        return in;
    }

    if (!c->sendfile) {
        return ngx_writev_chain(c, in, limit);
    }


    /* the maximum limit size is the maximum size_t value - the page size */

    if (limit == 0 || limit > NGX_MAX_SIZE_T_VALUE - ngx_pagesize) {
        limit = NGX_MAX_SIZE_T_VALUE - ngx_pagesize;
    }


    send = 0;
    complete = 0;

    vec.elts = sfvs;
    vec.size = sizeof(sendfilevec_t);
    vec.nalloc = NGX_SENDFILEVECS;
    vec.pool = c->pool;

    for ( ;; ) {
        fd = SFV_FD_SELF;
        prev = NULL;
        fprev = 0;
        sfv = NULL;
        eintr = 0;
        sent = 0;
        prev_send = send;

        vec.nelts = 0;

        /* create the sendfilevec and coalesce the neighbouring bufs */

        for (cl = in; cl && vec.nelts < IOV_MAX && send < limit; cl = cl->next)
        {
            if (ngx_buf_special(cl->buf)) {
                continue;
            }

            if (ngx_buf_in_memory_only(cl->buf)) {
                fd = SFV_FD_SELF;

                size = cl->buf->last - cl->buf->pos;

                if (send + size > limit) {
                    size = limit - send;
                }

                if (prev == cl->buf->pos) {
                    sfv->sfv_len += (size_t) size;

                } else {
                    if (!(sfv = ngx_array_push(&vec))) {
                        return NGX_CHAIN_ERROR;
                    }

                    sfv->sfv_fd = SFV_FD_SELF;
                    sfv->sfv_flag = 0;
                    sfv->sfv_off = (off_t) (uintptr_t) cl->buf->pos;
                    sfv->sfv_len = (size_t) size;
                }

                prev = cl->buf->pos + (size_t) size;
                send += size;

            } else {
                prev = NULL;

                size = cl->buf->file_last - cl->buf->file_pos;

                if (send + size > limit) {
                    size = limit - send;

                    aligned = (cl->buf->file_pos + size + ngx_pagesize - 1)
                                                      & ~(ngx_pagesize - 1);

                    if (aligned <= cl->buf->file_last) {
                        size = aligned - cl->buf->file_pos;
                    }
                }

                if (fd == cl->buf->file->fd && fprev == cl->buf->file_pos) {
                    sfv->sfv_len += (size_t) size;

                } else {
                    if (!(sfv = ngx_array_push(&vec))) {
                        return NGX_CHAIN_ERROR;
                    }

                    fd = cl->buf->file->fd;
                    sfv->sfv_fd = fd;
                    sfv->sfv_flag = 0;
                    sfv->sfv_off = cl->buf->file_pos;
                    sfv->sfv_len = (size_t) size;
                }

                fprev = cl->buf->file_pos + size;
                send += size;
            }
        }

        n = sendfilev(c->fd, vec.elts, vec.nelts, &sent);

        if (n == -1) {
            err = ngx_errno;

            if (err == NGX_EAGAIN || err == NGX_EINTR) {
                if (err == NGX_EINTR) {
                    eintr = 1;
                }

                ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, err,
                              "sendfilev() sent only %uz bytes", sent);

            } else {
                wev->error = 1;
                ngx_connection_error(c, err, "sendfilev() failed");
                return NGX_CHAIN_ERROR;
            }
        }

        ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0,
                       "sendfilev: %z %z", n, sent);

        if (send - prev_send == (off_t) sent) {
            complete = 1;
        }

        c->sent += sent;

        for (cl = in; cl; cl = cl->next) {

            if (ngx_buf_special(cl->buf)) {
                continue; 
            }

            if (sent == 0) {
                break;
            }

            size = ngx_buf_size(cl->buf);

            if ((off_t) sent >= size) {
                sent = (size_t) ((off_t) sent - size);

                if (ngx_buf_in_memory(cl->buf)) {
                    cl->buf->pos = cl->buf->last;
                }

                if (cl->buf->in_file) {
                    cl->buf->file_pos = cl->buf->file_last;
                }

                continue;
            }

            if (ngx_buf_in_memory(cl->buf)) {
                cl->buf->pos += sent;
            }

            if (cl->buf->in_file) {
                cl->buf->file_pos += sent;
            }

            break;
        }

        if (eintr) {
            continue;
        }

        if (!complete) {
            wev->ready = 0;
            return cl;
        }

        if (send >= limit || cl == NULL) {
            return cl;
        }

        in = cl;
    }
}