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Diffstat (limited to 'src/os/unix/ngx_darwin_sendfile_chain.c')
-rw-r--r--src/os/unix/ngx_darwin_sendfile_chain.c363
1 files changed, 363 insertions, 0 deletions
diff --git a/src/os/unix/ngx_darwin_sendfile_chain.c b/src/os/unix/ngx_darwin_sendfile_chain.c
new file mode 100644
index 000000000..e3ec7f704
--- /dev/null
+++ b/src/os/unix/ngx_darwin_sendfile_chain.c
@@ -0,0 +1,363 @@
+
+/*
+ * Copyright (C) Igor Sysoev
+ */
+
+
+#include <ngx_config.h>
+#include <ngx_core.h>
+#include <ngx_event.h>
+
+
+/*
+ * It seems that Darwin 9.4 (Mac OS X 1.5) sendfile() has the same
+ * old bug as early FreeBSD sendfile() syscall:
+ * http://www.freebsd.org/cgi/query-pr.cgi?pr=33771
+ *
+ * Besides sendfile() has another bug: if one calls sendfile()
+ * with both a header and a trailer, then sendfile() ignores a file part
+ * at all and sends only the header and the trailer together.
+ * For this reason we send a trailer only if there is no a header.
+ *
+ * Although sendfile() allows to pass a header or a trailer,
+ * it may send the header or the trailer and a part of the file
+ * in different packets. And FreeBSD workaround (TCP_NOPUSH option)
+ * does not help.
+ */
+
+
+#if (IOV_MAX > 64)
+#define NGX_HEADERS 64
+#define NGX_TRAILERS 64
+#else
+#define NGX_HEADERS IOV_MAX
+#define NGX_TRAILERS IOV_MAX
+#endif
+
+
+ngx_chain_t *
+ngx_darwin_sendfile_chain(ngx_connection_t *c, ngx_chain_t *in, off_t limit)
+{
+ int rc;
+ u_char *prev;
+ off_t size, send, prev_send, aligned, sent, fprev;
+ off_t header_size, file_size;
+ ngx_uint_t eintr, eagain, complete;
+ ngx_err_t err;
+ ngx_buf_t *file;
+ ngx_array_t header, trailer;
+ ngx_event_t *wev;
+ ngx_chain_t *cl;
+ struct sf_hdtr hdtr;
+ struct iovec *iov, headers[NGX_HEADERS], trailers[NGX_TRAILERS];
+
+ wev = c->write;
+
+ if (!wev->ready) {
+ return in;
+ }
+
+#if (NGX_HAVE_KQUEUE)
+
+ if ((ngx_event_flags & NGX_USE_KQUEUE_EVENT) && wev->pending_eof) {
+ (void) ngx_connection_error(c, wev->kq_errno,
+ "kevent() reported about an closed connection");
+ wev->error = 1;
+ return NGX_CHAIN_ERROR;
+ }
+
+#endif
+
+ /* the maximum limit size is the maximum size_t value - the page size */
+
+ if (limit == 0 || limit > (off_t) (NGX_MAX_SIZE_T_VALUE - ngx_pagesize)) {
+ limit = NGX_MAX_SIZE_T_VALUE - ngx_pagesize;
+ }
+
+ send = 0;
+ eagain = 0;
+
+ header.elts = headers;
+ header.size = sizeof(struct iovec);
+ header.nalloc = NGX_HEADERS;
+ header.pool = c->pool;
+
+ trailer.elts = trailers;
+ trailer.size = sizeof(struct iovec);
+ trailer.nalloc = NGX_TRAILERS;
+ trailer.pool = c->pool;
+
+ for ( ;; ) {
+ file = NULL;
+ file_size = 0;
+ header_size = 0;
+ eintr = 0;
+ complete = 0;
+ prev_send = send;
+
+ header.nelts = 0;
+ trailer.nelts = 0;
+
+ /* create the header iovec and coalesce the neighbouring bufs */
+
+ prev = NULL;
+ iov = NULL;
+
+ for (cl = in;
+ cl && header.nelts < IOV_MAX && send < limit;
+ cl = cl->next)
+ {
+ if (ngx_buf_special(cl->buf)) {
+ continue;
+ }
+
+ if (!ngx_buf_in_memory_only(cl->buf)) {
+ break;
+ }
+
+ size = cl->buf->last - cl->buf->pos;
+
+ if (send + size > limit) {
+ size = limit - send;
+ }
+
+ if (prev == cl->buf->pos) {
+ iov->iov_len += (size_t) size;
+
+ } else {
+ iov = ngx_array_push(&header);
+ if (iov == NULL) {
+ return NGX_CHAIN_ERROR;
+ }
+
+ iov->iov_base = (void *) cl->buf->pos;
+ iov->iov_len = (size_t) size;
+ }
+
+ prev = cl->buf->pos + (size_t) size;
+ header_size += size;
+ send += size;
+ }
+
+
+ if (cl && cl->buf->in_file && send < limit) {
+ file = cl->buf;
+
+ /* coalesce the neighbouring file bufs */
+
+ do {
+ 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)
+ & ~((off_t) ngx_pagesize - 1);
+
+ if (aligned <= cl->buf->file_last) {
+ size = aligned - cl->buf->file_pos;
+ }
+ }
+
+ file_size += size;
+ send += size;
+ fprev = cl->buf->file_pos + size;
+ cl = cl->next;
+
+ } while (cl
+ && cl->buf->in_file
+ && send < limit
+ && file->file->fd == cl->buf->file->fd
+ && fprev == cl->buf->file_pos);
+ }
+
+ if (file && header.nelts == 0) {
+
+ /* create the tailer iovec and coalesce the neighbouring bufs */
+
+ prev = NULL;
+ iov = NULL;
+
+ while (cl && header.nelts < IOV_MAX && send < limit) {
+
+ if (ngx_buf_special(cl->buf)) {
+ cl = cl->next;
+ continue;
+ }
+
+ if (!ngx_buf_in_memory_only(cl->buf)) {
+ break;
+ }
+
+ size = cl->buf->last - cl->buf->pos;
+
+ if (send + size > limit) {
+ size = limit - send;
+ }
+
+ if (prev == cl->buf->pos) {
+ iov->iov_len += (size_t) size;
+
+ } else {
+ iov = ngx_array_push(&trailer);
+ if (iov == NULL) {
+ return NGX_CHAIN_ERROR;
+ }
+
+ iov->iov_base = (void *) cl->buf->pos;
+ iov->iov_len = (size_t) size;
+ }
+
+ prev = cl->buf->pos + (size_t) size;
+ send += size;
+ cl = cl->next;
+ }
+ }
+
+ if (file) {
+
+ /*
+ * sendfile() returns EINVAL if sf_hdtr's count is 0,
+ * but corresponding pointer is not NULL
+ */
+
+ hdtr.headers = header.nelts ? (struct iovec *) header.elts: NULL;
+ hdtr.hdr_cnt = header.nelts;
+ hdtr.trailers = trailer.nelts ? (struct iovec *) trailer.elts: NULL;
+ hdtr.trl_cnt = trailer.nelts;
+
+ sent = header_size + file_size;
+
+ ngx_log_debug3(NGX_LOG_DEBUG_EVENT, c->log, 0,
+ "sendfile: @%O %O h:%O",
+ file->file_pos, sent, header_size);
+
+ rc = sendfile(file->file->fd, c->fd, file->file_pos,
+ &sent, &hdtr, 0);
+
+ if (rc == -1) {
+ err = ngx_errno;
+
+ if (err == NGX_EAGAIN || err == NGX_EINTR) {
+ if (err == NGX_EINTR) {
+ eintr = 1;
+
+ } else {
+ eagain = 1;
+ }
+
+ ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, err,
+ "sendfile() sent only %O bytes", sent);
+
+ } else {
+ wev->error = 1;
+ (void) ngx_connection_error(c, err, "sendfile() failed");
+ return NGX_CHAIN_ERROR;
+ }
+ }
+
+ if (rc == 0 && sent == 0) {
+
+ /*
+ * if rc and sent equal to zero, then someone
+ * has truncated the file, so the offset became beyond
+ * the end of the file
+ */
+
+ ngx_log_error(NGX_LOG_ALERT, c->log, 0,
+ "sendfile() reported that \"%s\" was truncated",
+ file->file->name.data);
+
+ return NGX_CHAIN_ERROR;
+ }
+
+ ngx_log_debug4(NGX_LOG_DEBUG_EVENT, c->log, 0,
+ "sendfile: %d, @%O %O:%O",
+ rc, file->file_pos, sent, file_size + header_size);
+
+ } else {
+ rc = writev(c->fd, header.elts, header.nelts);
+
+ ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0,
+ "writev: %d of %uz", rc, send);
+
+ if (rc == -1) {
+ err = ngx_errno;
+
+ if (err == NGX_EAGAIN || err == NGX_EINTR) {
+ if (err == NGX_EINTR) {
+ eintr = 1;
+ }
+
+ ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, err,
+ "writev() not ready");
+
+ } else {
+ wev->error = 1;
+ ngx_connection_error(c, err, "writev() failed");
+ return NGX_CHAIN_ERROR;
+ }
+ }
+
+ sent = rc > 0 ? rc : 0;
+ }
+
+ if (send - prev_send == 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 (sent >= size) {
+ 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 += (size_t) 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;
+ }
+}
generated by cgit v1.2.3 (git 2.25.1) at 2025-07-18 17:34:59 +0000