1 files changed, 135 insertions, 0 deletions
diff --git a/vold/volmgr_vfat.c b/vold/volmgr_vfat.c
new file mode 100644
index 0000000..1dc4c8d
--- /dev/null
+++ b/vold/volmgr_vfat.c
@@ -0,0 +1,135 @@
+
+/*
+ * Copyright (C) 2008 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 <errno.h>
+
+#include <sys/mount.h>
+
+#include "vold.h"
+#include "volmgr.h"
+#include "volmgr_vfat.h"
+#include "logwrapper.h"
+
+#define VFAT_DEBUG 0
+
+static char FSCK_MSDOS_PATH[] = "/system/bin/dosfsck";
+
+int vfat_identify(blkdev_t *dev)
+{
+#if VFAT_DEBUG
+    LOG_VOL("vfat_identify(%d:%d):", dev->major, dev->minor);
+#endif
+    return 0; // XXX: Implement
+}
+
+int vfat_check(blkdev_t *dev)
+{
+    int rc;
+
+#if VFAT_DEBUG
+    LOG_VOL("vfat_check(%d:%d):", dev->major, dev->minor);
+#endif
+
+    if (access(FSCK_MSDOS_PATH, X_OK)) {
+        LOGE("vfat_check(%d:%d): %s not found (skipping checks)",
+             dev->major, dev->minor, FSCK_MSDOS_PATH);
+        return 0;
+    }
+
+#ifdef VERIFY_PASS
+    char *args[7];
+    args[0] = FSCK_MSDOS_PATH;
+    args[1] = "-v";
+    args[2] = "-V";
+    args[3] = "-w";
+    args[4] = "-p";
+    args[5] = blkdev_get_devpath(dev);
+    args[6] = NULL;
+    rc = logwrap(6, args);
+    free(args[5]);
+#else
+    char *args[6];
+    args[0] = FSCK_MSDOS_PATH;
+    args[1] = "-v";
+    args[2] = "-w";
+    args[3] = "-p";
+    args[4] = blkdev_get_devpath(dev);
+    args[5] = NULL;
+    rc = logwrap(5, args);
+    free(args[4]);
+#endif
+
+    if (rc == 0) {
+        LOG_VOL("Filesystem check completed OK");
+        return 0;
+    } else if (rc == 1) {
+        LOG_VOL("Filesystem check failed (general failure)");
+        return -EINVAL;
+    } else if (rc == 2) {
+        LOG_VOL("Filesystem check failed (invalid usage)");
+        return -EIO;
+    } else if (rc == 4) {
+        LOG_VOL("Filesystem check completed (errors fixed)");
+    } else if (rc == 8) {
+        LOG_VOL("Filesystem check failed (not a FAT filesystem)");
+        return -ENODATA;
+    } else {
+        LOG_VOL("Filesystem check failed (unknown exit code %d)", rc);
+        return -EIO;
+    }
+    return 0;
+}
+
+int vfat_mount(blkdev_t *dev, volume_t *vol, boolean safe_mode)
+{
+    int flags, rc;
+    char *devpath;
+
+    devpath = blkdev_get_devpath(dev);
+
+#if VFAT_DEBUG
+    LOG_VOL("vfat_mount(%d:%d, %s, %d):", dev->major, dev->minor, vol->mount_point, safe_mode);
+#endif
+
+    flags = MS_NODEV | MS_NOEXEC | MS_NOSUID | MS_DIRSYNC;
+
+    if (safe_mode)
+        flags |= MS_SYNCHRONOUS;
+    if (vol->state == volstate_mounted) {
+        LOG_VOL("Remounting %d:%d on %s, safe mode %d", dev->major,
+                dev->minor, vol->mount_point, safe_mode);
+        flags |= MS_REMOUNT;
+    }
+
+    rc = mount(devpath, vol->mount_point, "vfat", flags,
+               "utf8,uid=1000,gid=1000,fmask=711,dmask=700");
+
+    if (rc && errno == EROFS) {
+        LOGE("vfat_mount(%d:%d, %s): Read only filesystem - retrying mount RO",
+             dev->major, dev->minor, vol->mount_point);
+        flags |= MS_RDONLY;
+        rc = mount(devpath, vol->mount_point, "vfat", flags,
+                   "utf8,uid=1000,gid=1000,fmask=711,dmask=700");
+    }
+
+#if VFAT_DEBUG
+    LOG_VOL("vfat_mount(%s, %d:%d): mount rc = %d", dev->major,k dev->minor,
+            vol->mount_point, rc);
+#endif
+    free (devpath);
+    return rc;
+}