Mercurial > hg > nginx-quic
view src/os/unix/ngx_linux_sendfile_chain.c @ 122:cd91e4a1ad0d
nginx-0.0.1-2003-07-23-17:10:12 import
author | Igor Sysoev <igor@sysoev.ru> |
---|---|
date | Wed, 23 Jul 2003 13:10:12 +0000 |
parents | 70d2345a903f |
children | 8dee38ea9117 |
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#include <ngx_config.h> #include <ngx_core.h> #include <ngx_linux_init.h> ngx_chain_t *ngx_linux_sendfile_chain(ngx_connection_t *c, ngx_chain_t *in) { int rc, on, off; char *prev; size_t hsize, size; ssize_t sent; struct iovec *iov; struct sf_hdtr hdtr; ngx_err_t err; ngx_array_t header, trailer; ngx_hunk_t *file; ngx_chain_t *ce; ce = in; file = NULL; hsize = 0; on = 1; off = 0; ngx_init_array(header, c->pool, 10, sizeof(struct iovec), NGX_CHAIN_ERROR); ngx_init_array(trailer, c->pool, 10, sizeof(struct iovec), NGX_CHAIN_ERROR); /* create the header iovec */ if (ngx_hunk_in_memory_only(ce->hunk)) { prev = NULL; iov = NULL; /* create the iovec and coalesce the neighbouring chain entries */ while (ce && ngx_hunk_in_memory_only(ce->hunk)) { if (prev == ce->hunk->pos) { iov->iov_len += ce->hunk->last - ce->hunk->pos; prev = ce->hunk->last; } else { ngx_test_null(iov, ngx_push_array(&header), NGX_CHAIN_ERROR); iov->iov_base = ce->hunk->pos; iov->iov_len = ce->hunk->last - ce->hunk->pos; prev = ce->hunk->last; } if (ngx_freebsd_sendfile_nbytes_bug) { hsize += ce->hunk->last - ce->hunk->pos; } ce = ce->next; } } /* TODO: coalesce the neighbouring file hunks */ if (ce && (ce->hunk->type & NGX_HUNK_FILE)) { file = ce->hunk; ce = ce->next; } /* create the trailer iovec */ if (ce && ngx_hunk_in_memory_only(ce->hunk)) { prev = NULL; iov = NULL; /* create the iovec and coalesce the neighbouring chain entries */ while (ce && ngx_hunk_in_memory_only(ce->hunk)) { if (prev == ce->hunk->pos) { iov->iov_len += ce->hunk->last - ce->hunk->pos; prev = ce->hunk->last; } else { ngx_test_null(iov, ngx_push_array(&trailer), NGX_CHAIN_ERROR); iov->iov_base = ce->hunk->pos; iov->iov_len = ce->hunk->last - ce->hunk->pos; prev = ce->hunk->last; } ce = ce->next; } } if (file) { if (setsockopt(c->fd, IPPROTO_TCP, TCP_CORK, (const void *) &on, sizeof(int)) == -1) { ngx_log_error(NGX_LOG_CRIT, c->log, err, "setsockopt(TCP_CORK, 1) failed"); return NGX_CHAIN_ERROR; } rc = sendfile(c->fd, file->file->fd, file->file_pos, (size_t) (file->file_last - file->file_pos)); if (rc == -1) { err = ngx_errno; if (err == NGX_EAGAIN) { ngx_log_error(NGX_LOG_INFO, c->log, err, "senfile() EAGAIN"); } else if (err == NGX_EINTR) { ngx_log_error(NGX_LOG_INFO, c->log, err, "senfile() EINTR"); } else { ngx_log_error(NGX_LOG_CRIT, c->log, err, "sendfile() failed"); return NGX_CHAIN_ERROR; } } sent = rc > 0 ? rc : 0; #if (NGX_DEBUG_WRITE_CHAIN) ngx_log_debug(c->log, "sendfile: %d, @%qd %d:%d" _ rc _ file->file_pos _ sent _ (size_t) (file->file_last - file->file_pos)); #endif } else { rc = writev(c->fd, (struct iovec *) header.elts, header.nelts); if (rc == -1) { err = ngx_errno; if (err == NGX_EAGAIN) { ngx_log_error(NGX_LOG_INFO, c->log, err, "writev() EAGAIN"); } else if (err == NGX_EINTR) { ngx_log_error(NGX_LOG_INFO, c->log, err, "writev() EINTR"); } else { ngx_log_error(NGX_LOG_CRIT, c->log, err, "writev() failed"); return NGX_CHAIN_ERROR; } } sent = rc > 0 ? rc : 0; #if (NGX_DEBUG_WRITE_CHAIN) ngx_log_debug(c->log, "writev: %d" _ sent); #endif } c->sent += sent; for (ce = in; ce && sent > 0; ce = ce->next) { if (ce->hunk->type & NGX_HUNK_IN_MEMORY) { size = ce->hunk->last - ce->hunk->pos; } else { size = ce->hunk->file_last - ce->hunk->file_pos; } if (sent >= size) { sent -= size; if (ce->hunk->type & NGX_HUNK_IN_MEMORY) { ce->hunk->pos = ce->hunk->last; } if (ce->hunk->type & NGX_HUNK_FILE) { ce->hunk->file_pos = ce->hunk->file_last; } continue; } if (ce->hunk->type & NGX_HUNK_IN_MEMORY) { ce->hunk->pos += sent; } if (ce->hunk->type & NGX_HUNK_FILE) { ce->hunk->file_pos += sent; } break; } ngx_destroy_array(&trailer); ngx_destroy_array(&header); return ce; }