Add Alfred Perlstein's sendfile patches, as an optional knob.

svn path=/head/; revision=68452

www/thttpd/files/patch-libhttpd.c

@@ -0,0 +1,12 @@
+--- libhttpd.c.orig	Mon May 27 01:22:26 2002
++++ libhttpd.c	Sun Oct 20 23:49:58 2002
+@@ -3816,6 +3816,9 @@
+ 	    httpd_send_err( hc, 500, err500title, "", err500form, hc->encodedurl );
+ 	    return -1;
+ 	    }
++#ifdef USE_SENDFILE
++	hc->file_fd = *((int *) hc->file_address);
++#endif
+ 	send_mime(
+ 	    hc, 200, ok200title, hc->encodings, "", hc->type, hc->sb.st_size,
+ 	    hc->sb.st_mtime );

www/thttpd/files/patch-libhttpd.h

@@ -0,0 +1,12 @@
+--- libhttpd.h.orig	Sun Oct 20 23:50:43 2002
++++ libhttpd.h	Sun Oct 20 23:51:10 2002
+@@ -141,6 +141,9 @@
+     struct stat sb;
+     int conn_fd;
+     char* file_address;
++#ifdef USE_SENDFILE
++    int file_fd;
++#endif
+     } httpd_conn;
+ 
+ /* Methods. */

www/thttpd/files/patch-mmc.c

@@ -0,0 +1,70 @@
+--- mmc.c.orig	Wed May  8 03:35:05 2002
++++ mmc.c	Sun Oct 20 23:56:15 2002
+@@ -74,6 +74,9 @@
+     time_t ctime;
+     int refcount;
+     time_t reftime;
++#ifdef USE_SENDFILE
++    int fd;
++#endif
+     void* addr;
+     unsigned int hash;
+     int hash_idx;
+@@ -140,7 +143,11 @@
+ 	/* Yep.  Just return the existing map */
+ 	++m->refcount;
+ 	m->reftime = now;
++#ifdef USE_SENDFILE
++	return (&m->fd);
++#else
+ 	return m->addr;
++#endif
+ 	}
+ 
+     /* Open the file. */
+@@ -186,7 +193,9 @@
+     else
+ 	{
+ 	size_t size_size = (size_t) m->size;	/* loses on files >2GB */
+-#ifdef HAVE_MMAP
++#ifdef USE_SENDFILE
++	m->fd = fd;
++#elif defined(HAVE_MMAP)
+ 	/* Map the file into memory. */
+ 	m->addr = mmap( 0, size_size, PROT_READ, MAP_PRIVATE, fd, 0 );
+ 	if ( m->addr == (void*) -1 && errno == ENOMEM )
+@@ -240,8 +249,9 @@
+ 	    }
+ #endif /* HAVE_MMAP */
+ 	}
++#ifndef USE_SENDFILE
+     (void) close( fd );
+-
++#endif /* !USE_SENDFILE */
+     /* Put the Map into the hash table. */
+     if ( add_hash( m ) < 0 )
+ 	{
+@@ -259,8 +269,12 @@
+     /* Update the total byte count. */
+     mapped_bytes += m->size;
+ 
++#ifdef USE_SENDFILE
++    return (&m->fd);
++#else
+     /* And return the address. */
+     return m->addr;
++#endif
+     }
+ 
+ 
+@@ -369,7 +383,9 @@
+     m = *mm;
+     if ( m->size != 0 )
+ 	{
+-#ifdef HAVE_MMAP
++#ifdef USE_SENDFILE
++	close(m->fd);	    
++#elif defined(HAVE_MMAP)
+ 	if ( munmap( m->addr, m->size ) < 0 )
+ 	    syslog( LOG_ERR, "munmap - %m" );
+ #else /* HAVE_MMAP */

www/thttpd/files/patch-thttpd.c

@@ -0,0 +1,56 @@
+--- thttpd.c.orig	Sat May 25 19:43:13 2002
++++ thttpd.c	Sun Oct 20 23:58:44 2002
+@@ -1500,12 +1500,45 @@
+     if ( hc->responselen == 0 )
+ 	{
+ 	/* No, just write the file. */
++#ifdef USE_SENDFILE
++	off_t sbytes;
++	
++	sz = sendfile(
++	     hc->file_fd, hc->conn_fd, c->bytes_sent,
++	     MIN( c->bytes_to_send - c->bytes_sent, c->limit ),
++	     NULL, &sbytes, 0 );
++	if (sz == -1 && errno == EAGAIN)
++	    sz = sbytes > 0 ? sbytes : -1;
++	else if (sz == 0)
++	    sz = sbytes;
++#else		      
+ 	sz = write(
+ 	    hc->conn_fd, &(hc->file_address[c->bytes_sent]),
+ 	    MIN( c->bytes_to_send - c->bytes_sent, c->limit ) );
++#endif
+ 	}
+     else
+ 	{
++#ifdef USE_SENDFILE
++	struct sf_hdtr sf;
++	struct iovec iv;
++	off_t sbytes;
++
++	iv.iov_base = hc->response;
++	iv.iov_len = hc->responselen;
++	sf.headers = &iv;
++	sf.hdr_cnt = 1;
++	sf.trailers = NULL;
++	sf.trl_cnt = 0;
++	sz = sendfile(
++	     hc->file_fd, hc->conn_fd, c->bytes_sent,
++	     MIN( c->bytes_to_send - c->bytes_sent, c->limit ),
++	     &sf, &sbytes, 0 );
++	if (sz == -1 && errno == EAGAIN)
++	    sz = sbytes > 0 ? sbytes : -1;
++	else if (sz == 0)
++	    sz = sbytes;
++#else		      
+ 	/* Yes.  We'll combine headers and file into a single writev(),
+ 	** hoping that this generates a single packet.
+ 	*/
+@@ -1516,6 +1549,7 @@
+ 	iv[1].iov_base = &(hc->file_address[c->bytes_sent]);
+ 	iv[1].iov_len = MIN( c->bytes_to_send - c->bytes_sent, c->limit );
+ 	sz = writev( hc->conn_fd, iv, 2 );
++#endif
+ 	}
+ 
+     if ( sz == 0 ||