These changes are the raw update to qemu-2.6.

[kvmfornfv.git] / qemu / roms / ipxe / src / net / tcp / httpblock.c

diff --git a/qemu/roms/ipxe/src/net/tcp/httpblock.c b/qemu/roms/ipxe/src/net/tcp/httpblock.c
new file mode 100644 (file)
index 0000000..e124ad2
--- /dev/null
+++ b/qemu/roms/ipxe/src/net/tcp/httpblock.c
@@ -0,0 +1,134 @@
+/*
+ * Copyright (C) 2015 Michael Brown <mbrown@fensystems.co.uk>.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ *
+ * You can also choose to distribute this program under the terms of
+ * the Unmodified Binary Distribution Licence (as given in the file
+ * COPYING.UBDL), provided that you have satisfied its requirements.
+ */
+
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
+
+/**
+ * @file
+ *
+ * Hyper Text Transfer Protocol (HTTP) block device
+ *
+ */
+
+#include <stdint.h>
+#include <ipxe/uaccess.h>
+#include <ipxe/blocktrans.h>
+#include <ipxe/blockdev.h>
+#include <ipxe/acpi.h>
+#include <ipxe/http.h>
+
+/** Block size used for HTTP block device requests */
+#define HTTP_BLKSIZE 512
+
+/**
+ * Read from block device
+ *
+ * @v http             HTTP transaction
+ * @v data             Data interface
+ * @v lba              Starting logical block address
+ * @v count            Number of logical blocks
+ * @v buffer           Data buffer
+ * @v len              Length of data buffer
+ * @ret rc             Return status code
+ */
+int http_block_read ( struct http_transaction *http, struct interface *data,
+                     uint64_t lba, unsigned int count, userptr_t buffer,
+                     size_t len ) {
+       struct http_request_range range;
+       int rc;
+
+       /* Sanity check */
+       assert ( len == ( count * HTTP_BLKSIZE ) );
+
+       /* Construct request range descriptor */
+       range.start = ( lba * HTTP_BLKSIZE );
+       range.len = len;
+
+       /* Start a range request to retrieve the block(s) */
+       if ( ( rc = http_open ( data, &http_get, http->uri, &range,
+                               NULL ) ) != 0 )
+               goto err_open;
+
+       /* Insert block device translator */
+       if ( ( rc = block_translate ( data, buffer, len ) ) != 0 ) {
+               DBGC ( http, "HTTP %p could not insert block translator: %s\n",
+                      http, strerror ( rc ) );
+               goto err_translate;
+       }
+
+       return 0;
+
+ err_translate:
+       intf_restart ( data, rc );
+ err_open:
+       return rc;
+}
+
+/**
+ * Read block device capacity
+ *
+ * @v control          Control interface
+ * @v data             Data interface
+ * @ret rc             Return status code
+ */
+int http_block_read_capacity ( struct http_transaction *http,
+                              struct interface *data ) {
+       int rc;
+
+       /* Start a HEAD request to retrieve the capacity */
+       if ( ( rc = http_open ( data, &http_head, http->uri, NULL,
+                               NULL ) ) != 0 )
+               goto err_open;
+
+       /* Insert block device translator */
+       if ( ( rc = block_translate ( data, UNULL, HTTP_BLKSIZE ) ) != 0 ) {
+               DBGC ( http, "HTTP %p could not insert block translator: %s\n",
+                      http, strerror ( rc ) );
+               goto err_translate;
+       }
+
+       return 0;
+
+ err_translate:
+       intf_restart ( data, rc );
+ err_open:
+       return rc;
+}
+
+/**
+ * Describe device in ACPI table
+ *
+ * @v http             HTTP transaction
+ * @v acpi             ACPI table
+ * @v len              Length of ACPI table
+ * @ret rc             Return status code
+ */
+int http_acpi_describe ( struct http_transaction *http,
+                        struct acpi_description_header *acpi, size_t len ) {
+
+       DBGC ( http, "HTTP %p cannot yet describe device in an ACPI table\n",
+              http );
+       ( void ) acpi;
+       ( void ) len;
+       return 0;
+}