From 18a78e0a162c35756628610307f41179816d3333 Mon Sep 17 00:00:00 2001
From: Doug Zongker <dougz@google.com>
Date: Thu, 10 Jul 2014 07:31:46 -0700
Subject: refactor fuse sideloading code

Split the adb-specific portions (fetching a block from the adb host
and closing the connections) out from the rest of the FUSE filesystem
code, so that we can reuse the fuse stuff for installing off sdcards
as well.

Change-Id: I0ba385fd35999c5f5cad27842bc82024a264dd14
---
 minadbd/fuse_adb_provider.c | 67 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 67 insertions(+)
 create mode 100644 minadbd/fuse_adb_provider.c

(limited to 'minadbd/fuse_adb_provider.c')

diff --git a/minadbd/fuse_adb_provider.c b/minadbd/fuse_adb_provider.c
new file mode 100644
index 000000000..f80533a8c
--- /dev/null
+++ b/minadbd/fuse_adb_provider.c
@@ -0,0 +1,67 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <errno.h>
+
+#include "adb.h"
+#include "fuse_sideload.h"
+
+struct adb_data {
+    int sfd;  // file descriptor for the adb channel
+
+    uint64_t file_size;
+    uint32_t block_size;
+};
+
+static int read_block_adb(void* cookie, uint32_t block, uint8_t* buffer, uint32_t fetch_size) {
+    struct adb_data* ad = (struct adb_data*)cookie;
+
+    char buf[10];
+    snprintf(buf, sizeof(buf), "%08u", block);
+    if (writex(ad->sfd, buf, 8) < 0) {
+        fprintf(stderr, "failed to write to adb host: %s\n", strerror(errno));
+        return -EIO;
+    }
+
+    if (readx(ad->sfd, buffer, fetch_size) < 0) {
+        fprintf(stderr, "failed to read from adb host: %s\n", strerror(errno));
+        return -EIO;
+    }
+
+    return 0;
+}
+
+static void close_adb(void* cookie) {
+    struct adb_data* ad = (struct adb_data*)cookie;
+
+    writex(ad->sfd, "DONEDONE", 8);
+}
+
+int run_adb_fuse(int sfd, uint64_t file_size, uint32_t block_size) {
+    struct adb_data ad;
+    struct provider_vtab vtab;
+
+    ad.sfd = sfd;
+    ad.file_size = file_size;
+    ad.block_size = block_size;
+
+    vtab.read_block = read_block_adb;
+    vtab.close = close_adb;
+
+    return run_fuse_sideload(&vtab, &ad, file_size, block_size);
+}
-- 
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