diff --git a/sdcard/Android.bp b/sdcard/Android.bp
new file mode 100644
index 0000000..c096587
--- /dev/null
+++ b/sdcard/Android.bp
@@ -0,0 +1,17 @@
+cc_binary {
+    srcs: ["sdcard.cpp"],
+    name: "sdcard",
+    cflags: [
+        "-Wall",
+        "-Wno-unused-parameter",
+        "-Werror",
+    ],
+    shared_libs: [
+        "libbase",
+        "libcutils",
+        "libminijail",
+    ],
+    sanitize: {
+        misc_undefined: ["integer"],
+    },
+}
diff --git a/sdcard/Android.mk b/sdcard/Android.mk
deleted file mode 100644
index 5b4dc58..0000000
--- a/sdcard/Android.mk
+++ /dev/null
@@ -1,12 +0,0 @@
-LOCAL_PATH := $(call my-dir)
-
-include $(CLEAR_VARS)
-
-LOCAL_SRC_FILES := sdcard.cpp fuse.cpp
-LOCAL_MODULE := sdcard
-LOCAL_CFLAGS := -Wall -Wno-unused-parameter -Werror
-LOCAL_SHARED_LIBRARIES := libbase libcutils libminijail libpackagelistparser
-
-LOCAL_SANITIZE := integer
-
-include $(BUILD_EXECUTABLE)
diff --git a/sdcard/fuse.cpp b/sdcard/fuse.cpp
deleted file mode 100644
index 10d0f04..0000000
--- a/sdcard/fuse.cpp
+++ /dev/null
@@ -1,1476 +0,0 @@
-/*
- * Copyright (C) 2010 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 <string.h>
-#include <unistd.h>
-
-#define LOG_TAG "sdcard"
-
-#include "fuse.h"
-
-#include <android-base/logging.h>
-
-/* FUSE_CANONICAL_PATH is not currently upstreamed */
-#define FUSE_CANONICAL_PATH 2016
-
-#define FUSE_UNKNOWN_INO 0xffffffff
-
-/* Pseudo-error constant used to indicate that no fuse status is needed
- * or that a reply has already been written. */
-#define NO_STATUS 1
-
-static inline void *id_to_ptr(__u64 nid)
-{
-    return (void *) (uintptr_t) nid;
-}
-
-static inline __u64 ptr_to_id(void *ptr)
-{
-    return (__u64) (uintptr_t) ptr;
-}
-
-static void acquire_node_locked(struct node* node)
-{
-    node->refcount++;
-    DLOG(INFO) << "ACQUIRE " << std::hex << node << std::dec
-               << " (" << node->name << ") rc=" << node->refcount;
-}
-
-static void remove_node_from_parent_locked(struct node* node);
-
-static void release_node_locked(struct node* node)
-{
-    DLOG(INFO) << "RELEASE " << std::hex << node << std::dec
-               << " (" << node->name << ") rc=" << node->refcount;
-    if (node->refcount > 0) {
-        node->refcount--;
-        if (!node->refcount) {
-            DLOG(INFO) << "DESTROY " << std::hex << node << std::dec << " (" << node->name << ")";
-            remove_node_from_parent_locked(node);
-
-            /* TODO: remove debugging - poison memory */
-            memset(node->name, 0xef, node->namelen);
-            free(node->name);
-            free(node->actual_name);
-            memset(node, 0xfc, sizeof(*node));
-            free(node);
-        }
-    } else {
-        LOG(ERROR) << std::hex << node << std::dec << " refcount=0";
-    }
-}
-
-static void add_node_to_parent_locked(struct node *node, struct node *parent) {
-    node->parent = parent;
-    node->next = parent->child;
-    parent->child = node;
-    acquire_node_locked(parent);
-}
-
-static void remove_node_from_parent_locked(struct node* node)
-{
-    if (node->parent) {
-        if (node->parent->child == node) {
-            node->parent->child = node->parent->child->next;
-        } else {
-            struct node *node2;
-            node2 = node->parent->child;
-            while (node2->next != node)
-                node2 = node2->next;
-            node2->next = node->next;
-        }
-        release_node_locked(node->parent);
-        node->parent = NULL;
-        node->next = NULL;
-    }
-}
-
-/* Gets the absolute path to a node into the provided buffer.
- *
- * Populates 'buf' with the path and returns the length of the path on success,
- * or returns -1 if the path is too long for the provided buffer.
- */
-static ssize_t get_node_path_locked(struct node* node, char* buf, size_t bufsize) {
-    const char* name;
-    size_t namelen;
-    if (node->graft_path) {
-        name = node->graft_path;
-        namelen = node->graft_pathlen;
-    } else if (node->actual_name) {
-        name = node->actual_name;
-        namelen = node->namelen;
-    } else {
-        name = node->name;
-        namelen = node->namelen;
-    }
-
-    if (bufsize < namelen + 1) {
-        return -1;
-    }
-
-    ssize_t pathlen = 0;
-    if (node->parent && node->graft_path == NULL) {
-        pathlen = get_node_path_locked(node->parent, buf, bufsize - namelen - 1);
-        if (pathlen < 0) {
-            return -1;
-        }
-        buf[pathlen++] = '/';
-    }
-
-    memcpy(buf + pathlen, name, namelen + 1); /* include trailing \0 */
-    return pathlen + namelen;
-}
-
-/* Finds the absolute path of a file within a given directory.
- * Performs a case-insensitive search for the file and sets the buffer to the path
- * of the first matching file.  If 'search' is zero or if no match is found, sets
- * the buffer to the path that the file would have, assuming the name were case-sensitive.
- *
- * Populates 'buf' with the path and returns the actual name (within 'buf') on success,
- * or returns NULL if the path is too long for the provided buffer.
- */
-static char* find_file_within(const char* path, const char* name,
-        char* buf, size_t bufsize, int search)
-{
-    size_t pathlen = strlen(path);
-    size_t namelen = strlen(name);
-    size_t childlen = pathlen + namelen + 1;
-    char* actual;
-
-    if (bufsize <= childlen) {
-        return NULL;
-    }
-
-    memcpy(buf, path, pathlen);
-    buf[pathlen] = '/';
-    actual = buf + pathlen + 1;
-    memcpy(actual, name, namelen + 1);
-
-    if (search && access(buf, F_OK)) {
-        struct dirent* entry;
-        DIR* dir = opendir(path);
-        if (!dir) {
-            PLOG(ERROR) << "opendir(" << path << ") failed";
-            return actual;
-        }
-        while ((entry = readdir(dir))) {
-            if (!strcasecmp(entry->d_name, name)) {
-                /* we have a match - replace the name, don't need to copy the null again */
-                memcpy(actual, entry->d_name, namelen);
-                break;
-            }
-        }
-        closedir(dir);
-    }
-    return actual;
-}
-
-static void attr_from_stat(struct fuse* fuse, struct fuse_attr *attr,
-        const struct stat *s, const struct node* node) {
-    attr->ino = node->ino;
-    attr->size = s->st_size;
-    attr->blocks = s->st_blocks;
-    attr->atime = s->st_atim.tv_sec;
-    attr->mtime = s->st_mtim.tv_sec;
-    attr->ctime = s->st_ctim.tv_sec;
-    attr->atimensec = s->st_atim.tv_nsec;
-    attr->mtimensec = s->st_mtim.tv_nsec;
-    attr->ctimensec = s->st_ctim.tv_nsec;
-    attr->mode = s->st_mode;
-    attr->nlink = s->st_nlink;
-
-    attr->uid = node->uid;
-
-    if (fuse->gid == AID_SDCARD_RW) {
-        /* As an optimization, certain trusted system components only run
-         * as owner but operate across all users. Since we're now handing
-         * out the sdcard_rw GID only to trusted apps, we're okay relaxing
-         * the user boundary enforcement for the default view. The UIDs
-         * assigned to app directories are still multiuser aware. */
-        attr->gid = AID_SDCARD_RW;
-    } else {
-        attr->gid = multiuser_get_uid(node->userid, fuse->gid);
-    }
-
-    int visible_mode = 0775 & ~fuse->mask;
-    if (node->perm == PERM_PRE_ROOT) {
-        /* Top of multi-user view should always be visible to ensure
-         * secondary users can traverse inside. */
-        visible_mode = 0711;
-    } else if (node->under_android) {
-        /* Block "other" access to Android directories, since only apps
-         * belonging to a specific user should be in there; we still
-         * leave +x open for the default view. */
-        if (fuse->gid == AID_SDCARD_RW) {
-            visible_mode = visible_mode & ~0006;
-        } else {
-            visible_mode = visible_mode & ~0007;
-        }
-    }
-    int owner_mode = s->st_mode & 0700;
-    int filtered_mode = visible_mode & (owner_mode | (owner_mode >> 3) | (owner_mode >> 6));
-    attr->mode = (attr->mode & S_IFMT) | filtered_mode;
-}
-
-static int touch(char* path, mode_t mode) {
-    int fd = TEMP_FAILURE_RETRY(open(path, O_RDWR | O_CREAT | O_EXCL | O_NOFOLLOW | O_CLOEXEC,
-                                     mode));
-    if (fd == -1) {
-        if (errno == EEXIST) {
-            return 0;
-        } else {
-            PLOG(ERROR) << "open(" << path << ") failed";
-            return -1;
-        }
-    }
-    close(fd);
-    return 0;
-}
-
-static void derive_permissions_locked(struct fuse* fuse, struct node *parent,
-        struct node *node) {
-    appid_t appid;
-
-    /* By default, each node inherits from its parent */
-    node->perm = PERM_INHERIT;
-    node->userid = parent->userid;
-    node->uid = parent->uid;
-    node->under_android = parent->under_android;
-
-    /* Derive custom permissions based on parent and current node */
-    switch (parent->perm) {
-    case PERM_INHERIT:
-        /* Already inherited above */
-        break;
-    case PERM_PRE_ROOT:
-        /* Legacy internal layout places users at top level */
-        node->perm = PERM_ROOT;
-        node->userid = strtoul(node->name, NULL, 10);
-        break;
-    case PERM_ROOT:
-        /* Assume masked off by default. */
-        if (!strcasecmp(node->name, "Android")) {
-            /* App-specific directories inside; let anyone traverse */
-            node->perm = PERM_ANDROID;
-            node->under_android = true;
-        }
-        break;
-    case PERM_ANDROID:
-        if (!strcasecmp(node->name, "data")) {
-            /* App-specific directories inside; let anyone traverse */
-            node->perm = PERM_ANDROID_DATA;
-        } else if (!strcasecmp(node->name, "obb")) {
-            /* App-specific directories inside; let anyone traverse */
-            node->perm = PERM_ANDROID_OBB;
-            /* Single OBB directory is always shared */
-            node->graft_path = fuse->global->obb_path;
-            node->graft_pathlen = strlen(fuse->global->obb_path);
-        } else if (!strcasecmp(node->name, "media")) {
-            /* App-specific directories inside; let anyone traverse */
-            node->perm = PERM_ANDROID_MEDIA;
-        }
-        break;
-    case PERM_ANDROID_DATA:
-    case PERM_ANDROID_OBB:
-    case PERM_ANDROID_MEDIA:
-        const auto& iter = fuse->global->package_to_appid->find(node->name);
-        if (iter != fuse->global->package_to_appid->end()) {
-            appid = iter->second;
-            node->uid = multiuser_get_uid(parent->userid, appid);
-        }
-        break;
-    }
-}
-
-void derive_permissions_recursive_locked(struct fuse* fuse, struct node *parent) {
-    struct node *node;
-    for (node = parent->child; node; node = node->next) {
-        derive_permissions_locked(fuse, parent, node);
-        if (node->child) {
-            derive_permissions_recursive_locked(fuse, node);
-        }
-    }
-}
-
-/* Kernel has already enforced everything we returned through
- * derive_permissions_locked(), so this is used to lock down access
- * even further, such as enforcing that apps hold sdcard_rw. */
-static bool check_caller_access_to_name(struct fuse* fuse,
-        const struct fuse_in_header *hdr, const struct node* parent_node,
-        const char* name, int mode) {
-    /* Always block security-sensitive files at root */
-    if (parent_node && parent_node->perm == PERM_ROOT) {
-        if (!strcasecmp(name, "autorun.inf")
-                || !strcasecmp(name, ".android_secure")
-                || !strcasecmp(name, "android_secure")) {
-            return false;
-        }
-    }
-
-    /* Root always has access; access for any other UIDs should always
-     * be controlled through packages.list. */
-    if (hdr->uid == AID_ROOT) {
-        return true;
-    }
-
-    /* No extra permissions to enforce */
-    return true;
-}
-
-static bool check_caller_access_to_node(struct fuse* fuse,
-        const struct fuse_in_header *hdr, const struct node* node, int mode) {
-    return check_caller_access_to_name(fuse, hdr, node->parent, node->name, mode);
-}
-
-struct node *create_node_locked(struct fuse* fuse,
-        struct node *parent, const char *name, const char* actual_name)
-{
-    struct node *node;
-    size_t namelen = strlen(name);
-
-    // Detect overflows in the inode counter. "4 billion nodes should be enough
-    // for everybody".
-    if (fuse->global->inode_ctr == 0) {
-        LOG(ERROR) << "No more inode numbers available";
-        return NULL;
-    }
-
-    node = static_cast<struct node*>(calloc(1, sizeof(struct node)));
-    if (!node) {
-        return NULL;
-    }
-    node->name = static_cast<char*>(malloc(namelen + 1));
-    if (!node->name) {
-        free(node);
-        return NULL;
-    }
-    memcpy(node->name, name, namelen + 1);
-    if (strcmp(name, actual_name)) {
-        node->actual_name = static_cast<char*>(malloc(namelen + 1));
-        if (!node->actual_name) {
-            free(node->name);
-            free(node);
-            return NULL;
-        }
-        memcpy(node->actual_name, actual_name, namelen + 1);
-    }
-    node->namelen = namelen;
-    node->nid = ptr_to_id(node);
-    node->ino = fuse->global->inode_ctr++;
-    node->gen = fuse->global->next_generation++;
-
-    node->deleted = false;
-
-    derive_permissions_locked(fuse, parent, node);
-    acquire_node_locked(node);
-    add_node_to_parent_locked(node, parent);
-    return node;
-}
-
-static int rename_node_locked(struct node *node, const char *name,
-        const char* actual_name)
-{
-    size_t namelen = strlen(name);
-    int need_actual_name = strcmp(name, actual_name);
-
-    /* make the storage bigger without actually changing the name
-     * in case an error occurs part way */
-    if (namelen > node->namelen) {
-        char* new_name = static_cast<char*>(realloc(node->name, namelen + 1));
-        if (!new_name) {
-            return -ENOMEM;
-        }
-        node->name = new_name;
-        if (need_actual_name && node->actual_name) {
-            char* new_actual_name = static_cast<char*>(realloc(node->actual_name, namelen + 1));
-            if (!new_actual_name) {
-                return -ENOMEM;
-            }
-            node->actual_name = new_actual_name;
-        }
-    }
-
-    /* update the name, taking care to allocate storage before overwriting the old name */
-    if (need_actual_name) {
-        if (!node->actual_name) {
-            node->actual_name = static_cast<char*>(malloc(namelen + 1));
-            if (!node->actual_name) {
-                return -ENOMEM;
-            }
-        }
-        memcpy(node->actual_name, actual_name, namelen + 1);
-    } else {
-        free(node->actual_name);
-        node->actual_name = NULL;
-    }
-    memcpy(node->name, name, namelen + 1);
-    node->namelen = namelen;
-    return 0;
-}
-
-static struct node *lookup_node_by_id_locked(struct fuse *fuse, __u64 nid)
-{
-    if (nid == FUSE_ROOT_ID) {
-        return &fuse->global->root;
-    } else {
-        return static_cast<struct node*>(id_to_ptr(nid));
-    }
-}
-
-static struct node* lookup_node_and_path_by_id_locked(struct fuse* fuse, __u64 nid,
-        char* buf, size_t bufsize)
-{
-    struct node* node = lookup_node_by_id_locked(fuse, nid);
-    if (node && get_node_path_locked(node, buf, bufsize) < 0) {
-        node = NULL;
-    }
-    return node;
-}
-
-static struct node *lookup_child_by_name_locked(struct node *node, const char *name)
-{
-    for (node = node->child; node; node = node->next) {
-        /* use exact string comparison, nodes that differ by case
-         * must be considered distinct even if they refer to the same
-         * underlying file as otherwise operations such as "mv x x"
-         * will not work because the source and target nodes are the same. */
-        if (!strcmp(name, node->name) && !node->deleted) {
-            return node;
-        }
-    }
-    return 0;
-}
-
-static struct node* acquire_or_create_child_locked(
-        struct fuse* fuse, struct node* parent,
-        const char* name, const char* actual_name)
-{
-    struct node* child = lookup_child_by_name_locked(parent, name);
-    if (child) {
-        acquire_node_locked(child);
-    } else {
-        child = create_node_locked(fuse, parent, name, actual_name);
-    }
-    return child;
-}
-
-static void fuse_status(struct fuse *fuse, __u64 unique, int err)
-{
-    struct fuse_out_header hdr;
-    hdr.len = sizeof(hdr);
-    hdr.error = err;
-    hdr.unique = unique;
-    ssize_t ret = TEMP_FAILURE_RETRY(write(fuse->fd, &hdr, sizeof(hdr)));
-    if (ret == -1) {
-        PLOG(ERROR) << "*** STATUS FAILED ***";
-    } else if (static_cast<size_t>(ret) != sizeof(hdr)) {
-        LOG(ERROR) << "*** STATUS FAILED: written " << ret << " expected "
-                   << sizeof(hdr) << " ***";
-    }
-}
-
-static void fuse_reply(struct fuse *fuse, __u64 unique, void *data, int len)
-{
-    struct fuse_out_header hdr;
-    hdr.len = len + sizeof(hdr);
-    hdr.error = 0;
-    hdr.unique = unique;
-
-    struct iovec vec[2];
-    vec[0].iov_base = &hdr;
-    vec[0].iov_len = sizeof(hdr);
-    vec[1].iov_base = data;
-    vec[1].iov_len = len;
-
-    ssize_t ret = TEMP_FAILURE_RETRY(writev(fuse->fd, vec, 2));
-    if (ret == -1) {
-        PLOG(ERROR) << "*** REPLY FAILED ***";
-    } else if (static_cast<size_t>(ret) != sizeof(hdr) + len) {
-        LOG(ERROR) << "*** REPLY FAILED: written " << ret << " expected "
-                   << sizeof(hdr) + len << " ***";
-    }
-}
-
-static int fuse_reply_entry(struct fuse* fuse, __u64 unique,
-        struct node* parent, const char* name, const char* actual_name,
-        const char* path)
-{
-    struct node* node;
-    struct fuse_entry_out out;
-    struct stat s;
-
-    if (lstat(path, &s) == -1) {
-        return -errno;
-    }
-
-    pthread_mutex_lock(&fuse->global->lock);
-    node = acquire_or_create_child_locked(fuse, parent, name, actual_name);
-    if (!node) {
-        pthread_mutex_unlock(&fuse->global->lock);
-        return -ENOMEM;
-    }
-    memset(&out, 0, sizeof(out));
-    attr_from_stat(fuse, &out.attr, &s, node);
-    out.attr_valid = 10;
-    out.entry_valid = 10;
-    out.nodeid = node->nid;
-    out.generation = node->gen;
-    pthread_mutex_unlock(&fuse->global->lock);
-    fuse_reply(fuse, unique, &out, sizeof(out));
-    return NO_STATUS;
-}
-
-static int fuse_reply_attr(struct fuse* fuse, __u64 unique, const struct node* node,
-        const char* path)
-{
-    struct fuse_attr_out out;
-    struct stat s;
-
-    if (lstat(path, &s) == -1) {
-        return -errno;
-    }
-    memset(&out, 0, sizeof(out));
-    attr_from_stat(fuse, &out.attr, &s, node);
-    out.attr_valid = 10;
-    fuse_reply(fuse, unique, &out, sizeof(out));
-    return NO_STATUS;
-}
-
-static void fuse_notify_delete(struct fuse* fuse, const __u64 parent,
-        const __u64 child, const char* name) {
-    struct fuse_out_header hdr;
-    struct fuse_notify_delete_out data;
-    size_t namelen = strlen(name);
-    hdr.len = sizeof(hdr) + sizeof(data) + namelen + 1;
-    hdr.error = FUSE_NOTIFY_DELETE;
-    hdr.unique = 0;
-
-    data.parent = parent;
-    data.child = child;
-    data.namelen = namelen;
-    data.padding = 0;
-
-    struct iovec vec[3];
-    vec[0].iov_base = &hdr;
-    vec[0].iov_len = sizeof(hdr);
-    vec[1].iov_base = &data;
-    vec[1].iov_len = sizeof(data);
-    vec[2].iov_base = (void*) name;
-    vec[2].iov_len = namelen + 1;
-
-    ssize_t ret = TEMP_FAILURE_RETRY(writev(fuse->fd, vec, 3));
-    /* Ignore ENOENT, since other views may not have seen the entry */
-    if (ret == -1) {
-        if (errno != ENOENT) {
-            PLOG(ERROR) << "*** NOTIFY FAILED ***";
-        }
-    } else if (static_cast<size_t>(ret) != sizeof(hdr) + sizeof(data) + namelen + 1) {
-        LOG(ERROR) << "*** NOTIFY FAILED: written " << ret << " expected "
-                   << sizeof(hdr) + sizeof(data) + namelen + 1 << " ***";
-    }
-}
-
-static int handle_lookup(struct fuse* fuse, struct fuse_handler* handler,
-        const struct fuse_in_header *hdr, const char* name)
-{
-    struct node* parent_node;
-    char parent_path[PATH_MAX];
-    char child_path[PATH_MAX];
-    const char* actual_name;
-
-    pthread_mutex_lock(&fuse->global->lock);
-    parent_node = lookup_node_and_path_by_id_locked(fuse, hdr->nodeid,
-            parent_path, sizeof(parent_path));
-    DLOG(INFO) << "[" << handler->token << "] LOOKUP " << name << " @ " << hdr->nodeid
-               << " (" << (parent_node ? parent_node->name : "?") << ")";
-    pthread_mutex_unlock(&fuse->global->lock);
-
-    if (!parent_node || !(actual_name = find_file_within(parent_path, name,
-            child_path, sizeof(child_path), 1))) {
-        return -ENOENT;
-    }
-    if (!check_caller_access_to_name(fuse, hdr, parent_node, name, R_OK)) {
-        return -EACCES;
-    }
-
-    return fuse_reply_entry(fuse, hdr->unique, parent_node, name, actual_name, child_path);
-}
-
-static int handle_forget(struct fuse* fuse, struct fuse_handler* handler,
-        const struct fuse_in_header *hdr, const struct fuse_forget_in *req)
-{
-    struct node* node;
-
-    pthread_mutex_lock(&fuse->global->lock);
-    node = lookup_node_by_id_locked(fuse, hdr->nodeid);
-    DLOG(INFO) << "[" << handler->token << "] FORGET #" << req->nlookup
-               << " @ " << std::hex << hdr->nodeid
-               << " (" << (node ? node->name : "?") << ")";
-    if (node) {
-        __u64 n = req->nlookup;
-        while (n) {
-            n--;
-            release_node_locked(node);
-        }
-    }
-    pthread_mutex_unlock(&fuse->global->lock);
-    return NO_STATUS; /* no reply */
-}
-
-static int handle_getattr(struct fuse* fuse, struct fuse_handler* handler,
-        const struct fuse_in_header *hdr, const struct fuse_getattr_in *req)
-{
-    struct node* node;
-    char path[PATH_MAX];
-
-    pthread_mutex_lock(&fuse->global->lock);
-    node = lookup_node_and_path_by_id_locked(fuse, hdr->nodeid, path, sizeof(path));
-    DLOG(INFO) << "[" << handler->token << "] GETATTR flags=" << req->getattr_flags
-               << " fh=" << std::hex << req->fh << " @ " << hdr->nodeid << std::dec
-               << " (" << (node ? node->name : "?") << ")";
-    pthread_mutex_unlock(&fuse->global->lock);
-
-    if (!node) {
-        return -ENOENT;
-    }
-    if (!check_caller_access_to_node(fuse, hdr, node, R_OK)) {
-        return -EACCES;
-    }
-
-    return fuse_reply_attr(fuse, hdr->unique, node, path);
-}
-
-static int handle_setattr(struct fuse* fuse, struct fuse_handler* handler,
-        const struct fuse_in_header *hdr, const struct fuse_setattr_in *req)
-{
-    struct node* node;
-    char path[PATH_MAX];
-    struct timespec times[2];
-
-    pthread_mutex_lock(&fuse->global->lock);
-    node = lookup_node_and_path_by_id_locked(fuse, hdr->nodeid, path, sizeof(path));
-    DLOG(INFO) << "[" << handler->token << "] SETATTR fh=" << std::hex << req->fh
-               << " valid=" << std::hex << req->valid << " @ " << hdr->nodeid << std::dec
-               << " (" << (node ? node->name : "?") << ")";
-    pthread_mutex_unlock(&fuse->global->lock);
-
-    if (!node) {
-        return -ENOENT;
-    }
-
-    if (!(req->valid & FATTR_FH) &&
-            !check_caller_access_to_node(fuse, hdr, node, W_OK)) {
-        return -EACCES;
-    }
-
-    /* XXX: incomplete implementation on purpose.
-     * chmod/chown should NEVER be implemented.*/
-
-    if ((req->valid & FATTR_SIZE) && TEMP_FAILURE_RETRY(truncate64(path, req->size)) == -1) {
-        return -errno;
-    }
-
-    /* Handle changing atime and mtime.  If FATTR_ATIME_and FATTR_ATIME_NOW
-     * are both set, then set it to the current time.  Else, set it to the
-     * time specified in the request.  Same goes for mtime.  Use utimensat(2)
-     * as it allows ATIME and MTIME to be changed independently, and has
-     * nanosecond resolution which fuse also has.
-     */
-    if (req->valid & (FATTR_ATIME | FATTR_MTIME)) {
-        times[0].tv_nsec = UTIME_OMIT;
-        times[1].tv_nsec = UTIME_OMIT;
-        if (req->valid & FATTR_ATIME) {
-            if (req->valid & FATTR_ATIME_NOW) {
-              times[0].tv_nsec = UTIME_NOW;
-            } else {
-              times[0].tv_sec = req->atime;
-              times[0].tv_nsec = req->atimensec;
-            }
-        }
-        if (req->valid & FATTR_MTIME) {
-            if (req->valid & FATTR_MTIME_NOW) {
-              times[1].tv_nsec = UTIME_NOW;
-            } else {
-              times[1].tv_sec = req->mtime;
-              times[1].tv_nsec = req->mtimensec;
-            }
-        }
-        DLOG(INFO) << "[" << handler->token << "] Calling utimensat on " << path
-                   << " with atime " << times[0].tv_sec << ", mtime=" << times[1].tv_sec;
-        if (utimensat(-1, path, times, 0) < 0) {
-            return -errno;
-        }
-    }
-    return fuse_reply_attr(fuse, hdr->unique, node, path);
-}
-
-static int handle_mknod(struct fuse* fuse, struct fuse_handler* handler,
-        const struct fuse_in_header* hdr, const struct fuse_mknod_in* req, const char* name)
-{
-    struct node* parent_node;
-    char parent_path[PATH_MAX];
-    char child_path[PATH_MAX];
-    const char* actual_name;
-
-    pthread_mutex_lock(&fuse->global->lock);
-    parent_node = lookup_node_and_path_by_id_locked(fuse, hdr->nodeid,
-            parent_path, sizeof(parent_path));
-    DLOG(INFO) << "[" << handler->token << "] MKNOD " << name << " 0" << std::oct << req->mode
-               << " @ " << std::hex << hdr->nodeid
-               << " (" << (parent_node ? parent_node->name : "?") << ")";
-    pthread_mutex_unlock(&fuse->global->lock);
-
-    if (!parent_node || !(actual_name = find_file_within(parent_path, name,
-            child_path, sizeof(child_path), 1))) {
-        return -ENOENT;
-    }
-    if (!check_caller_access_to_name(fuse, hdr, parent_node, name, W_OK)) {
-        return -EACCES;
-    }
-    __u32 mode = (req->mode & (~0777)) | 0664;
-    if (mknod(child_path, mode, req->rdev) == -1) {
-        return -errno;
-    }
-    return fuse_reply_entry(fuse, hdr->unique, parent_node, name, actual_name, child_path);
-}
-
-static int handle_mkdir(struct fuse* fuse, struct fuse_handler* handler,
-        const struct fuse_in_header* hdr, const struct fuse_mkdir_in* req, const char* name)
-{
-    struct node* parent_node;
-    char parent_path[PATH_MAX];
-    char child_path[PATH_MAX];
-    const char* actual_name;
-
-    pthread_mutex_lock(&fuse->global->lock);
-    parent_node = lookup_node_and_path_by_id_locked(fuse, hdr->nodeid,
-            parent_path, sizeof(parent_path));
-    DLOG(INFO) << "[" << handler->token << "] MKDIR " << name << " 0" << std::oct << req->mode
-               << " @ " << std::hex << hdr->nodeid
-               << " (" << (parent_node ? parent_node->name : "?") << ")";
-    pthread_mutex_unlock(&fuse->global->lock);
-
-    if (!parent_node || !(actual_name = find_file_within(parent_path, name,
-            child_path, sizeof(child_path), 1))) {
-        return -ENOENT;
-    }
-    if (!check_caller_access_to_name(fuse, hdr, parent_node, name, W_OK)) {
-        return -EACCES;
-    }
-    __u32 mode = (req->mode & (~0777)) | 0775;
-    if (mkdir(child_path, mode) == -1) {
-        return -errno;
-    }
-
-    /* When creating /Android/data and /Android/obb, mark them as .nomedia */
-    if (parent_node->perm == PERM_ANDROID && !strcasecmp(name, "data")) {
-        char nomedia[PATH_MAX];
-        snprintf(nomedia, PATH_MAX, "%s/.nomedia", child_path);
-        if (touch(nomedia, 0664) != 0) {
-            PLOG(ERROR) << "touch(" << nomedia << ") failed";
-            return -ENOENT;
-        }
-    }
-    if (parent_node->perm == PERM_ANDROID && !strcasecmp(name, "obb")) {
-        char nomedia[PATH_MAX];
-        snprintf(nomedia, PATH_MAX, "%s/.nomedia", fuse->global->obb_path);
-        if (touch(nomedia, 0664) != 0) {
-            PLOG(ERROR) << "touch(" << nomedia << ") failed";
-            return -ENOENT;
-        }
-    }
-
-    return fuse_reply_entry(fuse, hdr->unique, parent_node, name, actual_name, child_path);
-}
-
-static int handle_unlink(struct fuse* fuse, struct fuse_handler* handler,
-        const struct fuse_in_header* hdr, const char* name)
-{
-    struct node* parent_node;
-    struct node* child_node;
-    char parent_path[PATH_MAX];
-    char child_path[PATH_MAX];
-
-    pthread_mutex_lock(&fuse->global->lock);
-    parent_node = lookup_node_and_path_by_id_locked(fuse, hdr->nodeid,
-            parent_path, sizeof(parent_path));
-    DLOG(INFO) << "[" << handler->token << "] UNLINK " << name << " @ " << std::hex << hdr->nodeid
-               << " (" << (parent_node ? parent_node->name : "?") << ")";
-    pthread_mutex_unlock(&fuse->global->lock);
-
-    if (!parent_node || !find_file_within(parent_path, name,
-            child_path, sizeof(child_path), 1)) {
-        return -ENOENT;
-    }
-    if (!check_caller_access_to_name(fuse, hdr, parent_node, name, W_OK)) {
-        return -EACCES;
-    }
-    if (unlink(child_path) == -1) {
-        return -errno;
-    }
-    pthread_mutex_lock(&fuse->global->lock);
-    child_node = lookup_child_by_name_locked(parent_node, name);
-    if (child_node) {
-        child_node->deleted = true;
-    }
-    pthread_mutex_unlock(&fuse->global->lock);
-    if (parent_node && child_node) {
-        /* Tell all other views that node is gone */
-        DLOG(INFO) << "[" << handler->token << "] fuse_notify_delete"
-                   << " parent=" << std::hex << parent_node->nid
-                   << ", child=" << std::hex << child_node->nid << std::dec
-                   << ", name=" << name;
-        if (fuse != fuse->global->fuse_default) {
-            fuse_notify_delete(fuse->global->fuse_default, parent_node->nid, child_node->nid, name);
-        }
-        if (fuse != fuse->global->fuse_read) {
-            fuse_notify_delete(fuse->global->fuse_read, parent_node->nid, child_node->nid, name);
-        }
-        if (fuse != fuse->global->fuse_write) {
-            fuse_notify_delete(fuse->global->fuse_write, parent_node->nid, child_node->nid, name);
-        }
-    }
-    return 0;
-}
-
-static int handle_rmdir(struct fuse* fuse, struct fuse_handler* handler,
-        const struct fuse_in_header* hdr, const char* name)
-{
-    struct node* child_node;
-    struct node* parent_node;
-    char parent_path[PATH_MAX];
-    char child_path[PATH_MAX];
-
-    pthread_mutex_lock(&fuse->global->lock);
-    parent_node = lookup_node_and_path_by_id_locked(fuse, hdr->nodeid,
-            parent_path, sizeof(parent_path));
-    DLOG(INFO) << "[" << handler->token << "] UNLINK " << name << " @ " << std::hex << hdr->nodeid
-               << " (" << (parent_node ? parent_node->name : "?") << ")";
-    pthread_mutex_unlock(&fuse->global->lock);
-
-    if (!parent_node || !find_file_within(parent_path, name,
-            child_path, sizeof(child_path), 1)) {
-        return -ENOENT;
-    }
-    if (!check_caller_access_to_name(fuse, hdr, parent_node, name, W_OK)) {
-        return -EACCES;
-    }
-    if (rmdir(child_path) == -1) {
-        return -errno;
-    }
-    pthread_mutex_lock(&fuse->global->lock);
-    child_node = lookup_child_by_name_locked(parent_node, name);
-    if (child_node) {
-        child_node->deleted = true;
-    }
-    pthread_mutex_unlock(&fuse->global->lock);
-    if (parent_node && child_node) {
-        /* Tell all other views that node is gone */
-        DLOG(INFO) << "[" << handler->token << "] fuse_notify_delete"
-                   << " parent=" << std::hex << parent_node->nid
-                   << ", child=" << std::hex << child_node->nid << std::dec
-                   << ", name=" << name;
-        if (fuse != fuse->global->fuse_default) {
-            fuse_notify_delete(fuse->global->fuse_default, parent_node->nid, child_node->nid, name);
-        }
-        if (fuse != fuse->global->fuse_read) {
-            fuse_notify_delete(fuse->global->fuse_read, parent_node->nid, child_node->nid, name);
-        }
-        if (fuse != fuse->global->fuse_write) {
-            fuse_notify_delete(fuse->global->fuse_write, parent_node->nid, child_node->nid, name);
-        }
-    }
-    return 0;
-}
-
-static int handle_rename(struct fuse* fuse, struct fuse_handler* handler,
-        const struct fuse_in_header* hdr, const struct fuse_rename_in* req,
-        const char* old_name, const char* new_name)
-{
-    struct node* old_parent_node;
-    struct node* new_parent_node;
-    struct node* child_node;
-    char old_parent_path[PATH_MAX];
-    char new_parent_path[PATH_MAX];
-    char old_child_path[PATH_MAX];
-    char new_child_path[PATH_MAX];
-    const char* new_actual_name;
-    int search;
-    int res;
-
-    pthread_mutex_lock(&fuse->global->lock);
-    old_parent_node = lookup_node_and_path_by_id_locked(fuse, hdr->nodeid,
-            old_parent_path, sizeof(old_parent_path));
-    new_parent_node = lookup_node_and_path_by_id_locked(fuse, req->newdir,
-            new_parent_path, sizeof(new_parent_path));
-    DLOG(INFO) << "[" << handler->token << "] RENAME " << old_name << "->" << new_name
-               << " @ " << std::hex << hdr->nodeid
-               << " (" << (old_parent_node ? old_parent_node->name : "?") << ") -> "
-               << std::hex << req->newdir
-               << " (" << (new_parent_node ? new_parent_node->name : "?") << ")";
-    if (!old_parent_node || !new_parent_node) {
-        res = -ENOENT;
-        goto lookup_error;
-    }
-    if (!check_caller_access_to_name(fuse, hdr, old_parent_node, old_name, W_OK)) {
-        res = -EACCES;
-        goto lookup_error;
-    }
-    if (!check_caller_access_to_name(fuse, hdr, new_parent_node, new_name, W_OK)) {
-        res = -EACCES;
-        goto lookup_error;
-    }
-    child_node = lookup_child_by_name_locked(old_parent_node, old_name);
-    if (!child_node || get_node_path_locked(child_node,
-            old_child_path, sizeof(old_child_path)) < 0) {
-        res = -ENOENT;
-        goto lookup_error;
-    }
-    acquire_node_locked(child_node);
-    pthread_mutex_unlock(&fuse->global->lock);
-
-    /* Special case for renaming a file where destination is same path
-     * differing only by case.  In this case we don't want to look for a case
-     * insensitive match.  This allows commands like "mv foo FOO" to work as expected.
-     */
-    search = old_parent_node != new_parent_node
-            || strcasecmp(old_name, new_name);
-    if (!(new_actual_name = find_file_within(new_parent_path, new_name,
-            new_child_path, sizeof(new_child_path), search))) {
-        res = -ENOENT;
-        goto io_error;
-    }
-
-    DLOG(INFO) << "[" << handler->token << "] RENAME " << old_child_path << "->" << new_child_path;
-    res = rename(old_child_path, new_child_path);
-    if (res == -1) {
-        res = -errno;
-        goto io_error;
-    }
-
-    pthread_mutex_lock(&fuse->global->lock);
-    res = rename_node_locked(child_node, new_name, new_actual_name);
-    if (!res) {
-        remove_node_from_parent_locked(child_node);
-        derive_permissions_locked(fuse, new_parent_node, child_node);
-        derive_permissions_recursive_locked(fuse, child_node);
-        add_node_to_parent_locked(child_node, new_parent_node);
-    }
-    goto done;
-
-io_error:
-    pthread_mutex_lock(&fuse->global->lock);
-done:
-    release_node_locked(child_node);
-lookup_error:
-    pthread_mutex_unlock(&fuse->global->lock);
-    return res;
-}
-
-static int open_flags_to_access_mode(int open_flags) {
-    if ((open_flags & O_ACCMODE) == O_RDONLY) {
-        return R_OK;
-    } else if ((open_flags & O_ACCMODE) == O_WRONLY) {
-        return W_OK;
-    } else {
-        /* Probably O_RDRW, but treat as default to be safe */
-        return R_OK | W_OK;
-    }
-}
-
-static int handle_open(struct fuse* fuse, struct fuse_handler* handler,
-        const struct fuse_in_header* hdr, const struct fuse_open_in* req)
-{
-    struct node* node;
-    char path[PATH_MAX];
-    struct fuse_open_out out = {};
-    struct handle *h;
-
-    pthread_mutex_lock(&fuse->global->lock);
-    node = lookup_node_and_path_by_id_locked(fuse, hdr->nodeid, path, sizeof(path));
-    DLOG(INFO) << "[" << handler->token << "] OPEN 0" << std::oct << req->flags
-               << " @ " << std::hex << hdr->nodeid << std::dec
-               << " (" << (node ? node->name : "?") << ")";
-    pthread_mutex_unlock(&fuse->global->lock);
-
-    if (!node) {
-        return -ENOENT;
-    }
-    if (!check_caller_access_to_node(fuse, hdr, node,
-            open_flags_to_access_mode(req->flags))) {
-        return -EACCES;
-    }
-    h = static_cast<struct handle*>(malloc(sizeof(*h)));
-    if (!h) {
-        return -ENOMEM;
-    }
-    DLOG(INFO) << "[" << handler->token << "] OPEN " << path;
-    h->fd = TEMP_FAILURE_RETRY(open(path, req->flags));
-    if (h->fd == -1) {
-        free(h);
-        return -errno;
-    }
-    out.fh = ptr_to_id(h);
-    out.open_flags = 0;
-    fuse_reply(fuse, hdr->unique, &out, sizeof(out));
-    return NO_STATUS;
-}
-
-static int handle_read(struct fuse* fuse, struct fuse_handler* handler,
-        const struct fuse_in_header* hdr, const struct fuse_read_in* req)
-{
-    struct handle *h = static_cast<struct handle*>(id_to_ptr(req->fh));
-    __u64 unique = hdr->unique;
-    __u32 size = req->size;
-    __u64 offset = req->offset;
-    int res;
-    __u8 *read_buffer = (__u8 *) ((uintptr_t)(handler->read_buffer + PAGE_SIZE) & ~((uintptr_t)PAGE_SIZE-1));
-
-    /* Don't access any other fields of hdr or req beyond this point, the read buffer
-     * overlaps the request buffer and will clobber data in the request.  This
-     * saves us 128KB per request handler thread at the cost of this scary comment. */
-
-    DLOG(INFO) << "[" << handler->token << "] READ " << std::hex << h << std::dec
-               << "(" << h->fd << ") " << size << "@" << offset;
-    if (size > MAX_READ) {
-        return -EINVAL;
-    }
-    res = TEMP_FAILURE_RETRY(pread64(h->fd, read_buffer, size, offset));
-    if (res == -1) {
-        return -errno;
-    }
-    fuse_reply(fuse, unique, read_buffer, res);
-    return NO_STATUS;
-}
-
-static int handle_write(struct fuse* fuse, struct fuse_handler* handler,
-        const struct fuse_in_header* hdr, const struct fuse_write_in* req,
-        const void* buffer)
-{
-    struct fuse_write_out out;
-    struct handle *h = static_cast<struct handle*>(id_to_ptr(req->fh));
-    int res;
-    __u8 aligned_buffer[req->size] __attribute__((__aligned__(PAGE_SIZE)));
-
-    if (req->flags & O_DIRECT) {
-        memcpy(aligned_buffer, buffer, req->size);
-        buffer = (const __u8*) aligned_buffer;
-    }
-
-    DLOG(INFO) << "[" << handler->token << "] WRITE " << std::hex << h << std::dec
-               << "(" << h->fd << ") " << req->size << "@" << req->offset;
-    res = TEMP_FAILURE_RETRY(pwrite64(h->fd, buffer, req->size, req->offset));
-    if (res == -1) {
-        return -errno;
-    }
-    out.size = res;
-    out.padding = 0;
-    fuse_reply(fuse, hdr->unique, &out, sizeof(out));
-    return NO_STATUS;
-}
-
-static int handle_statfs(struct fuse* fuse, struct fuse_handler* handler,
-        const struct fuse_in_header* hdr)
-{
-    char path[PATH_MAX];
-    struct statfs stat;
-    struct fuse_statfs_out out;
-    int res;
-
-    pthread_mutex_lock(&fuse->global->lock);
-    DLOG(INFO) << "[" << handler->token << "] STATFS";
-    res = get_node_path_locked(&fuse->global->root, path, sizeof(path));
-    pthread_mutex_unlock(&fuse->global->lock);
-    if (res < 0) {
-        return -ENOENT;
-    }
-    if (TEMP_FAILURE_RETRY(statfs(fuse->global->root.name, &stat)) == -1) {
-        return -errno;
-    }
-    memset(&out, 0, sizeof(out));
-    out.st.blocks = stat.f_blocks;
-    out.st.bfree = stat.f_bfree;
-    out.st.bavail = stat.f_bavail;
-    out.st.files = stat.f_files;
-    out.st.ffree = stat.f_ffree;
-    out.st.bsize = stat.f_bsize;
-    out.st.namelen = stat.f_namelen;
-    out.st.frsize = stat.f_frsize;
-    fuse_reply(fuse, hdr->unique, &out, sizeof(out));
-    return NO_STATUS;
-}
-
-static int handle_release(struct fuse* fuse, struct fuse_handler* handler,
-        const struct fuse_in_header* hdr, const struct fuse_release_in* req)
-{
-    struct handle *h = static_cast<struct handle*>(id_to_ptr(req->fh));
-
-    DLOG(INFO) << "[" << handler->token << "] RELEASE " << std::hex << h << std::dec
-               << "(" << h->fd << ")";
-    close(h->fd);
-    free(h);
-    return 0;
-}
-
-static int handle_fsync(struct fuse* fuse, struct fuse_handler* handler,
-        const struct fuse_in_header* hdr, const struct fuse_fsync_in* req)
-{
-    bool is_dir = (hdr->opcode == FUSE_FSYNCDIR);
-    bool is_data_sync = req->fsync_flags & 1;
-
-    int fd = -1;
-    if (is_dir) {
-      struct dirhandle *dh = static_cast<struct dirhandle*>(id_to_ptr(req->fh));
-      fd = dirfd(dh->d);
-    } else {
-      struct handle *h = static_cast<struct handle*>(id_to_ptr(req->fh));
-      fd = h->fd;
-    }
-
-    DLOG(INFO) << "[" << handler->token << "] " << (is_dir ? "FSYNCDIR" : "FSYNC") << " "
-               << std::hex << req->fh << std::dec << "(" << fd << ") is_data_sync=" << is_data_sync;
-    int res = is_data_sync ? fdatasync(fd) : fsync(fd);
-    if (res == -1) {
-        return -errno;
-    }
-    return 0;
-}
-
-static int handle_flush(struct fuse* fuse, struct fuse_handler* handler,
-        const struct fuse_in_header* hdr)
-{
-    DLOG(INFO) << "[" << handler->token << "] FLUSH";
-    return 0;
-}
-
-static int handle_opendir(struct fuse* fuse, struct fuse_handler* handler,
-        const struct fuse_in_header* hdr, const struct fuse_open_in* req)
-{
-    struct node* node;
-    char path[PATH_MAX];
-    struct fuse_open_out out = {};
-    struct dirhandle *h;
-
-    pthread_mutex_lock(&fuse->global->lock);
-    node = lookup_node_and_path_by_id_locked(fuse, hdr->nodeid, path, sizeof(path));
-    DLOG(INFO) << "[" << handler->token << "] OPENDIR @ " << std::hex << hdr->nodeid
-               << " (" << (node ? node->name : "?") << ")";
-    pthread_mutex_unlock(&fuse->global->lock);
-
-    if (!node) {
-        return -ENOENT;
-    }
-    if (!check_caller_access_to_node(fuse, hdr, node, R_OK)) {
-        return -EACCES;
-    }
-    h = static_cast<struct dirhandle*>(malloc(sizeof(*h)));
-    if (!h) {
-        return -ENOMEM;
-    }
-    DLOG(INFO) << "[" << handler->token << "] OPENDIR " << path;
-    h->d = opendir(path);
-    if (!h->d) {
-        free(h);
-        return -errno;
-    }
-    out.fh = ptr_to_id(h);
-    out.open_flags = 0;
-    fuse_reply(fuse, hdr->unique, &out, sizeof(out));
-    return NO_STATUS;
-}
-
-static int handle_readdir(struct fuse* fuse, struct fuse_handler* handler,
-        const struct fuse_in_header* hdr, const struct fuse_read_in* req)
-{
-    char buffer[8192];
-    struct fuse_dirent *fde = (struct fuse_dirent*) buffer;
-    struct dirent *de;
-    struct dirhandle *h = static_cast<struct dirhandle*>(id_to_ptr(req->fh));
-
-    DLOG(INFO) << "[" << handler->token << "] READDIR " << h;
-    if (req->offset == 0) {
-        /* rewinddir() might have been called above us, so rewind here too */
-        DLOG(INFO) << "[" << handler->token << "] calling rewinddir()";
-        rewinddir(h->d);
-    }
-    de = readdir(h->d);
-    if (!de) {
-        return 0;
-    }
-    fde->ino = FUSE_UNKNOWN_INO;
-    /* increment the offset so we can detect when rewinddir() seeks back to the beginning */
-    fde->off = req->offset + 1;
-    fde->type = de->d_type;
-    fde->namelen = strlen(de->d_name);
-    memcpy(fde->name, de->d_name, fde->namelen + 1);
-    fuse_reply(fuse, hdr->unique, fde,
-            FUSE_DIRENT_ALIGN(sizeof(struct fuse_dirent) + fde->namelen));
-    return NO_STATUS;
-}
-
-static int handle_releasedir(struct fuse* fuse, struct fuse_handler* handler,
-        const struct fuse_in_header* hdr, const struct fuse_release_in* req)
-{
-    struct dirhandle *h = static_cast<struct dirhandle*>(id_to_ptr(req->fh));
-
-    DLOG(INFO) << "[" << handler->token << "] RELEASEDIR " << h;
-    closedir(h->d);
-    free(h);
-    return 0;
-}
-
-static int handle_init(struct fuse* fuse, struct fuse_handler* handler,
-        const struct fuse_in_header* hdr, const struct fuse_init_in* req)
-{
-    struct fuse_init_out out;
-    size_t fuse_struct_size;
-
-    DLOG(INFO) << "[" << handler->token << "] INIT ver=" << req->major << "." << req->minor
-               << " maxread=" << req->max_readahead << " flags=" << std::hex << req->flags;
-
-    /* Kernel 2.6.16 is the first stable kernel with struct fuse_init_out
-     * defined (fuse version 7.6). The structure is the same from 7.6 through
-     * 7.22. Beginning with 7.23, the structure increased in size and added
-     * new parameters.
-     */
-    if (req->major != FUSE_KERNEL_VERSION || req->minor < 6) {
-        LOG(ERROR) << "Fuse kernel version mismatch: Kernel version "
-                   << req->major << "." << req->minor
-                   << ", Expected at least " << FUSE_KERNEL_VERSION << ".6";
-        return -1;
-    }
-
-    /* We limit ourselves to 15 because we don't handle BATCH_FORGET yet */
-    out.minor = MIN(req->minor, 15);
-    fuse_struct_size = sizeof(out);
-#if defined(FUSE_COMPAT_22_INIT_OUT_SIZE)
-    /* FUSE_KERNEL_VERSION >= 23. */
-
-    /* Since we return minor version 15, the kernel does not accept the latest
-     * fuse_init_out size. We need to use FUSE_COMPAT_22_INIT_OUT_SIZE always.*/
-    fuse_struct_size = FUSE_COMPAT_22_INIT_OUT_SIZE;
-#endif
-
-    out.major = FUSE_KERNEL_VERSION;
-    out.max_readahead = req->max_readahead;
-    out.flags = FUSE_ATOMIC_O_TRUNC | FUSE_BIG_WRITES;
-    out.max_background = 32;
-    out.congestion_threshold = 32;
-    out.max_write = MAX_WRITE;
-    fuse_reply(fuse, hdr->unique, &out, fuse_struct_size);
-    return NO_STATUS;
-}
-
-static int handle_canonical_path(struct fuse* fuse, struct fuse_handler* handler,
-        const struct fuse_in_header *hdr)
-{
-    struct node* node;
-    char path[PATH_MAX];
-    int len;
-
-    pthread_mutex_lock(&fuse->global->lock);
-    node = lookup_node_and_path_by_id_locked(fuse, hdr->nodeid,
-            path, sizeof(path));
-    DLOG(INFO) << "[" << handler->token << "] CANONICAL_PATH @ " << std::hex << hdr->nodeid
-               << std::dec << " (" << (node ? node->name : "?") << ")";
-    pthread_mutex_unlock(&fuse->global->lock);
-
-    if (!node) {
-        return -ENOENT;
-    }
-    if (!check_caller_access_to_node(fuse, hdr, node, R_OK)) {
-        return -EACCES;
-    }
-    len = strlen(path);
-    if (len + 1 > PATH_MAX)
-        len = PATH_MAX - 1;
-    path[PATH_MAX - 1] = 0;
-    fuse_reply(fuse, hdr->unique, path, len + 1);
-    return NO_STATUS;
-}
-
-static int handle_fuse_request(struct fuse *fuse, struct fuse_handler* handler,
-        const struct fuse_in_header *hdr, const void *data, size_t data_len)
-{
-    switch (hdr->opcode) {
-    case FUSE_LOOKUP: { /* bytez[] -> entry_out */
-        const char *name = static_cast<const char*>(data);
-        return handle_lookup(fuse, handler, hdr, name);
-    }
-
-    case FUSE_FORGET: {
-        const struct fuse_forget_in *req = static_cast<const struct fuse_forget_in*>(data);
-        return handle_forget(fuse, handler, hdr, req);
-    }
-
-    case FUSE_GETATTR: { /* getattr_in -> attr_out */
-        const struct fuse_getattr_in *req = static_cast<const struct fuse_getattr_in*>(data);
-        return handle_getattr(fuse, handler, hdr, req);
-    }
-
-    case FUSE_SETATTR: { /* setattr_in -> attr_out */
-        const struct fuse_setattr_in *req = static_cast<const struct fuse_setattr_in*>(data);
-        return handle_setattr(fuse, handler, hdr, req);
-    }
-
-//    case FUSE_READLINK:
-//    case FUSE_SYMLINK:
-    case FUSE_MKNOD: { /* mknod_in, bytez[] -> entry_out */
-        const struct fuse_mknod_in *req = static_cast<const struct fuse_mknod_in*>(data);
-        const char *name = ((const char*) data) + sizeof(*req);
-        return handle_mknod(fuse, handler, hdr, req, name);
-    }
-
-    case FUSE_MKDIR: { /* mkdir_in, bytez[] -> entry_out */
-        const struct fuse_mkdir_in *req = static_cast<const struct fuse_mkdir_in*>(data);
-        const char *name = ((const char*) data) + sizeof(*req);
-        return handle_mkdir(fuse, handler, hdr, req, name);
-    }
-
-    case FUSE_UNLINK: { /* bytez[] -> */
-        const char *name = static_cast<const char*>(data);
-        return handle_unlink(fuse, handler, hdr, name);
-    }
-
-    case FUSE_RMDIR: { /* bytez[] -> */
-        const char *name = static_cast<const char*>(data);
-        return handle_rmdir(fuse, handler, hdr, name);
-    }
-
-    case FUSE_RENAME: { /* rename_in, oldname, newname ->  */
-        const struct fuse_rename_in *req = static_cast<const struct fuse_rename_in*>(data);
-        const char *old_name = ((const char*) data) + sizeof(*req);
-        const char *new_name = old_name + strlen(old_name) + 1;
-        return handle_rename(fuse, handler, hdr, req, old_name, new_name);
-    }
-
-//    case FUSE_LINK:
-    case FUSE_OPEN: { /* open_in -> open_out */
-        const struct fuse_open_in *req = static_cast<const struct fuse_open_in*>(data);
-        return handle_open(fuse, handler, hdr, req);
-    }
-
-    case FUSE_READ: { /* read_in -> byte[] */
-        const struct fuse_read_in *req = static_cast<const struct fuse_read_in*>(data);
-        return handle_read(fuse, handler, hdr, req);
-    }
-
-    case FUSE_WRITE: { /* write_in, byte[write_in.size] -> write_out */
-        const struct fuse_write_in *req = static_cast<const struct fuse_write_in*>(data);
-        const void* buffer = (const __u8*)data + sizeof(*req);
-        return handle_write(fuse, handler, hdr, req, buffer);
-    }
-
-    case FUSE_STATFS: { /* getattr_in -> attr_out */
-        return handle_statfs(fuse, handler, hdr);
-    }
-
-    case FUSE_RELEASE: { /* release_in -> */
-        const struct fuse_release_in *req = static_cast<const struct fuse_release_in*>(data);
-        return handle_release(fuse, handler, hdr, req);
-    }
-
-    case FUSE_FSYNC:
-    case FUSE_FSYNCDIR: {
-        const struct fuse_fsync_in *req = static_cast<const struct fuse_fsync_in*>(data);
-        return handle_fsync(fuse, handler, hdr, req);
-    }
-
-//    case FUSE_SETXATTR:
-//    case FUSE_GETXATTR:
-//    case FUSE_LISTXATTR:
-//    case FUSE_REMOVEXATTR:
-    case FUSE_FLUSH: {
-        return handle_flush(fuse, handler, hdr);
-    }
-
-    case FUSE_OPENDIR: { /* open_in -> open_out */
-        const struct fuse_open_in *req = static_cast<const struct fuse_open_in*>(data);
-        return handle_opendir(fuse, handler, hdr, req);
-    }
-
-    case FUSE_READDIR: {
-        const struct fuse_read_in *req = static_cast<const struct fuse_read_in*>(data);
-        return handle_readdir(fuse, handler, hdr, req);
-    }
-
-    case FUSE_RELEASEDIR: { /* release_in -> */
-        const struct fuse_release_in *req = static_cast<const struct fuse_release_in*>(data);
-        return handle_releasedir(fuse, handler, hdr, req);
-    }
-
-    case FUSE_INIT: { /* init_in -> init_out */
-        const struct fuse_init_in *req = static_cast<const struct fuse_init_in*>(data);
-        return handle_init(fuse, handler, hdr, req);
-    }
-
-    case FUSE_CANONICAL_PATH: { /* nodeid -> bytez[] */
-        return handle_canonical_path(fuse, handler, hdr);
-    }
-
-    default: {
-        DLOG(INFO) << "[" << handler->token << "] NOTIMPL op=" << hdr->opcode
-                   << "uniq=" << std::hex << hdr->unique << "nid=" << hdr->nodeid << std::dec;
-        return -ENOSYS;
-    }
-    }
-}
-
-void handle_fuse_requests(struct fuse_handler* handler)
-{
-    struct fuse* fuse = handler->fuse;
-    for (;;) {
-        ssize_t len = TEMP_FAILURE_RETRY(read(fuse->fd,
-                handler->request_buffer, sizeof(handler->request_buffer)));
-        if (len == -1) {
-            if (errno == ENODEV) {
-                LOG(ERROR) << "[" << handler->token << "] someone stole our marbles!";
-                exit(2);
-            }
-            PLOG(ERROR) << "[" << handler->token << "] handle_fuse_requests";
-            continue;
-        }
-
-        if (static_cast<size_t>(len) < sizeof(struct fuse_in_header)) {
-            LOG(ERROR) << "[" << handler->token << "] request too short: len=" << len;
-            continue;
-        }
-
-        const struct fuse_in_header* hdr =
-            reinterpret_cast<const struct fuse_in_header*>(handler->request_buffer);
-        if (hdr->len != static_cast<size_t>(len)) {
-            LOG(ERROR) << "[" << handler->token << "] malformed header: len=" << len
-                       << ", hdr->len=" << hdr->len;
-            continue;
-        }
-
-        const void *data = handler->request_buffer + sizeof(struct fuse_in_header);
-        size_t data_len = len - sizeof(struct fuse_in_header);
-        __u64 unique = hdr->unique;
-        int res = handle_fuse_request(fuse, handler, hdr, data, data_len);
-
-        /* We do not access the request again after this point because the underlying
-         * buffer storage may have been reused while processing the request. */
-
-        if (res != NO_STATUS) {
-            if (res) {
-                DLOG(INFO) << "[" << handler->token << "] ERROR " << res;
-            }
-            fuse_status(fuse, unique, res);
-        }
-    }
-}
diff --git a/sdcard/fuse.h b/sdcard/fuse.h
deleted file mode 100644
index 9ccd21d..0000000
--- a/sdcard/fuse.h
+++ /dev/null
@@ -1,209 +0,0 @@
-/*
- * Copyright (C) 2016 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.
- */
-
-#ifndef FUSE_H_
-#define FUSE_H_
-
-#include <dirent.h>
-#include <fcntl.h>
-#include <linux/fuse.h>
-#include <pthread.h>
-#include <stdbool.h>
-#include <stdlib.h>
-#include <sys/param.h>
-#include <sys/stat.h>
-#include <sys/statfs.h>
-#include <sys/types.h>
-#include <sys/uio.h>
-#include <unistd.h>
-
-#include <map>
-#include <string>
-
-#include <android-base/logging.h>
-#include <cutils/fs.h>
-#include <cutils/multiuser.h>
-#include <packagelistparser/packagelistparser.h>
-
-#include <private/android_filesystem_config.h>
-
-#define FUSE_TRACE 0
-
-#if FUSE_TRACE
-static constexpr bool kEnableDLog = true;
-#else  // FUSE_TRACE == 0
-static constexpr bool kEnableDLog = false;
-#endif
-
-// Use same strategy as DCHECK().
-#define DLOG(x) \
-    if (kEnableDLog) LOG(x)
-
-/* Maximum number of bytes to write in one request. */
-#define MAX_WRITE (256 * 1024)
-
-/* Maximum number of bytes to read in one request. */
-#define MAX_READ (128 * 1024)
-
-/* Largest possible request.
- * The request size is bounded by the maximum size of a FUSE_WRITE request because it has
- * the largest possible data payload. */
-#define MAX_REQUEST_SIZE (sizeof(struct fuse_in_header) + sizeof(struct fuse_write_in) + MAX_WRITE)
-
-namespace {
-struct CaseInsensitiveCompare {
-    bool operator()(const std::string& lhs, const std::string& rhs) const {
-        return strcasecmp(lhs.c_str(), rhs.c_str()) < 0;
-    }
-};
-}
-
-using AppIdMap = std::map<std::string, appid_t, CaseInsensitiveCompare>;
-
-/* Permission mode for a specific node. Controls how file permissions
- * are derived for children nodes. */
-typedef enum {
-    /* Nothing special; this node should just inherit from its parent. */
-    PERM_INHERIT,
-    /* This node is one level above a normal root; used for legacy layouts
-     * which use the first level to represent user_id. */
-    PERM_PRE_ROOT,
-    /* This node is "/" */
-    PERM_ROOT,
-    /* This node is "/Android" */
-    PERM_ANDROID,
-    /* This node is "/Android/data" */
-    PERM_ANDROID_DATA,
-    /* This node is "/Android/obb" */
-    PERM_ANDROID_OBB,
-    /* This node is "/Android/media" */
-    PERM_ANDROID_MEDIA,
-} perm_t;
-
-struct handle {
-    int fd;
-};
-
-struct dirhandle {
-    DIR *d;
-};
-
-struct node {
-    __u32 refcount;
-    __u64 nid;
-    __u64 gen;
-    /*
-     * The inode number for this FUSE node. Note that this isn't stable across
-     * multiple invocations of the FUSE daemon.
-     */
-    __u32 ino;
-
-    /* State derived based on current position in hierarchy. */
-    perm_t perm;
-    userid_t userid;
-    uid_t uid;
-    bool under_android;
-
-    struct node *next;          /* per-dir sibling list */
-    struct node *child;         /* first contained file by this dir */
-    struct node *parent;        /* containing directory */
-
-    size_t namelen;
-    char *name;
-    /* If non-null, this is the real name of the file in the underlying storage.
-     * This may differ from the field "name" only by case.
-     * strlen(actual_name) will always equal strlen(name), so it is safe to use
-     * namelen for both fields.
-     */
-    char *actual_name;
-
-    /* If non-null, an exact underlying path that should be grafted into this
-     * position. Used to support things like OBB. */
-    char* graft_path;
-    size_t graft_pathlen;
-
-    bool deleted;
-};
-
-/* Global data for all FUSE mounts */
-struct fuse_global {
-    pthread_mutex_t lock;
-
-    uid_t uid;
-    gid_t gid;
-    bool multi_user;
-
-    char source_path[PATH_MAX];
-    char obb_path[PATH_MAX];
-
-    AppIdMap* package_to_appid;
-
-    __u64 next_generation;
-    struct node root;
-
-    /* Used to allocate unique inode numbers for fuse nodes. We use
-     * a simple counter based scheme where inode numbers from deleted
-     * nodes aren't reused. Note that inode allocations are not stable
-     * across multiple invocation of the sdcard daemon, but that shouldn't
-     * be a huge problem in practice.
-     *
-     * Note that we restrict inodes to 32 bit unsigned integers to prevent
-     * truncation on 32 bit processes when unsigned long long stat.st_ino is
-     * assigned to an unsigned long ino_t type in an LP32 process.
-     *
-     * Also note that fuse_attr and fuse_dirent inode values are 64 bits wide
-     * on both LP32 and LP64, but the fuse kernel code doesn't squash 64 bit
-     * inode numbers into 32 bit values on 64 bit kernels (see fuse_squash_ino
-     * in fs/fuse/inode.c).
-     *
-     * Accesses must be guarded by |lock|.
-     */
-    __u32 inode_ctr;
-
-    struct fuse* fuse_default;
-    struct fuse* fuse_read;
-    struct fuse* fuse_write;
-};
-
-/* Single FUSE mount */
-struct fuse {
-    struct fuse_global* global;
-
-    char dest_path[PATH_MAX];
-
-    int fd;
-
-    gid_t gid;
-    mode_t mask;
-};
-
-/* Private data used by a single FUSE handler */
-struct fuse_handler {
-    struct fuse* fuse;
-    int token;
-
-    /* To save memory, we never use the contents of the request buffer and the read
-     * buffer at the same time.  This allows us to share the underlying storage. */
-    union {
-        __u8 request_buffer[MAX_REQUEST_SIZE];
-        __u8 read_buffer[MAX_READ + PAGE_SIZE];
-    };
-};
-
-void handle_fuse_requests(struct fuse_handler* handler);
-void derive_permissions_recursive_locked(struct fuse* fuse, struct node *parent);
-
-#endif  /* FUSE_H_ */
diff --git a/sdcard/sdcard.cpp b/sdcard/sdcard.cpp
index 0d5e5af..574bbfe 100644
--- a/sdcard/sdcard.cpp
+++ b/sdcard/sdcard.cpp
@@ -38,164 +38,18 @@
 #include <cutils/multiuser.h>
 #include <cutils/properties.h>
 
-#include <packagelistparser/packagelistparser.h>
-
 #include <libminijail.h>
 #include <scoped_minijail.h>
 
 #include <private/android_filesystem_config.h>
 
-// README
-//
-// What is this?
-//
-// sdcard is a program that uses FUSE to emulate FAT-on-sdcard style
-// directory permissions (all files are given fixed owner, group, and
-// permissions at creation, owner, group, and permissions are not
-// changeable, symlinks and hardlinks are not createable, etc.
-//
-// See usage() for command line options.
-//
-// It must be run as root, but will drop to requested UID/GID as soon as it
-// mounts a filesystem.  It will refuse to run if requested UID/GID are zero.
-//
-// Things I believe to be true:
-//
-// - ops that return a fuse_entry (LOOKUP, MKNOD, MKDIR, LINK, SYMLINK,
-// CREAT) must bump that node's refcount
-// - don't forget that FORGET can forget multiple references (req->nlookup)
-// - if an op that returns a fuse_entry fails writing the reply to the
-// kernel, you must rollback the refcount to reflect the reference the
-// kernel did not actually acquire
-//
-// This daemon can also derive custom filesystem permissions based on directory
-// structure when requested. These custom permissions support several features:
-//
-// - Apps can access their own files in /Android/data/com.example/ without
-// requiring any additional GIDs.
-// - Separate permissions for protecting directories like Pictures and Music.
-// - Multi-user separation on the same physical device.
-
-#include "fuse.h"
-
-#define PROP_SDCARDFS_DEVICE "ro.sys.sdcardfs"
-#define PROP_SDCARDFS_USER "persist.sys.sdcardfs"
+// NOTE: This is a vestigial program that simply exists to mount the in-kernel
+// sdcardfs filesystem.  The older FUSE-based design that used to live here has
+// been completely removed to avoid confusion.
 
 /* Supplementary groups to execute with. */
 static const gid_t kGroups[1] = { AID_PACKAGE_INFO };
 
-static bool package_parse_callback(pkg_info *info, void *userdata) {
-    struct fuse_global *global = (struct fuse_global *)userdata;
-    bool res = global->package_to_appid->emplace(info->name, info->uid).second;
-    packagelist_free(info);
-    return res;
-}
-
-static bool read_package_list(struct fuse_global* global) {
-    pthread_mutex_lock(&global->lock);
-
-    global->package_to_appid->clear();
-    bool rc = packagelist_parse(package_parse_callback, global);
-    DLOG(INFO) << "read_package_list: found " << global->package_to_appid->size() << " packages";
-
-    // Regenerate ownership details using newly loaded mapping.
-    derive_permissions_recursive_locked(global->fuse_default, &global->root);
-
-    pthread_mutex_unlock(&global->lock);
-
-    return rc;
-}
-
-static void watch_package_list(struct fuse_global* global) {
-    struct inotify_event *event;
-    char event_buf[512];
-
-    int nfd = inotify_init();
-    if (nfd == -1) {
-        PLOG(ERROR) << "inotify_init failed";
-        return;
-    }
-
-    bool active = false;
-    while (1) {
-        if (!active) {
-            int res = inotify_add_watch(nfd, PACKAGES_LIST_FILE, IN_DELETE_SELF);
-            if (res == -1) {
-                if (errno == ENOENT || errno == EACCES) {
-                    /* Framework may not have created the file yet, sleep and retry. */
-                    LOG(ERROR) << "missing \"" << PACKAGES_LIST_FILE << "\"; retrying...";
-                    sleep(3);
-                    continue;
-                } else {
-                    PLOG(ERROR) << "inotify_add_watch failed";
-                    return;
-                }
-            }
-
-            /* Watch above will tell us about any future changes, so
-             * read the current state. */
-            if (read_package_list(global) == false) {
-                LOG(ERROR) << "read_package_list failed";
-                return;
-            }
-            active = true;
-        }
-
-        int event_pos = 0;
-        ssize_t res = TEMP_FAILURE_RETRY(read(nfd, event_buf, sizeof(event_buf)));
-        if (res == -1) {
-            PLOG(ERROR) << "failed to read inotify event";
-            return;
-        } else if (static_cast<size_t>(res) < sizeof(*event)) {
-            LOG(ERROR) << "failed to read inotify event: read " << res << " expected "
-                       << sizeof(event_buf);
-            return;
-        }
-
-        while (res >= static_cast<ssize_t>(sizeof(*event))) {
-            int event_size;
-            event = reinterpret_cast<struct inotify_event*>(event_buf + event_pos);
-
-            DLOG(INFO) << "inotify event: " << std::hex << event->mask << std::dec;
-            if ((event->mask & IN_IGNORED) == IN_IGNORED) {
-                /* Previously watched file was deleted, probably due to move
-                 * that swapped in new data; re-arm the watch and read. */
-                active = false;
-            }
-
-            event_size = sizeof(*event) + event->len;
-            res -= event_size;
-            event_pos += event_size;
-        }
-    }
-}
-
-static int fuse_setup(struct fuse* fuse, gid_t gid, mode_t mask) {
-    char opts[256];
-
-    fuse->fd = TEMP_FAILURE_RETRY(open("/dev/fuse", O_RDWR | O_CLOEXEC));
-    if (fuse->fd == -1) {
-        PLOG(ERROR) << "failed to open fuse device";
-        return -1;
-    }
-
-    umount2(fuse->dest_path, MNT_DETACH);
-
-    snprintf(opts, sizeof(opts),
-            "fd=%i,rootmode=40000,default_permissions,allow_other,user_id=%d,group_id=%d",
-            fuse->fd, fuse->global->uid, fuse->global->gid);
-    if (mount("/dev/fuse", fuse->dest_path, "fuse", MS_NOSUID | MS_NODEV | MS_NOEXEC | MS_NOATIME,
-              opts) == -1) {
-        PLOG(ERROR) << "failed to mount fuse filesystem";
-        return -1;
-    }
-
-    fuse->gid = gid;
-    fuse->mask = mask;
-
-    return 0;
-}
-
 static void drop_privs(uid_t uid, gid_t gid) {
     ScopedMinijail j(minijail_new());
     minijail_set_supplementary_gids(j.get(), arraysize(kGroups), kGroups);
@@ -205,120 +59,6 @@
     minijail_enter(j.get());
 }
 
-static void* start_handler(void* data) {
-    struct fuse_handler* handler = static_cast<fuse_handler*>(data);
-    handle_fuse_requests(handler);
-    return NULL;
-}
-
-static void run(const char* source_path, const char* label, uid_t uid,
-        gid_t gid, userid_t userid, bool multi_user, bool full_write) {
-    struct fuse_global global;
-    struct fuse fuse_default;
-    struct fuse fuse_read;
-    struct fuse fuse_write;
-    struct fuse_handler handler_default;
-    struct fuse_handler handler_read;
-    struct fuse_handler handler_write;
-    pthread_t thread_default;
-    pthread_t thread_read;
-    pthread_t thread_write;
-
-    memset(&global, 0, sizeof(global));
-    memset(&fuse_default, 0, sizeof(fuse_default));
-    memset(&fuse_read, 0, sizeof(fuse_read));
-    memset(&fuse_write, 0, sizeof(fuse_write));
-    memset(&handler_default, 0, sizeof(handler_default));
-    memset(&handler_read, 0, sizeof(handler_read));
-    memset(&handler_write, 0, sizeof(handler_write));
-
-    pthread_mutex_init(&global.lock, NULL);
-    global.package_to_appid = new AppIdMap;
-    global.uid = uid;
-    global.gid = gid;
-    global.multi_user = multi_user;
-    global.next_generation = 0;
-    global.inode_ctr = 1;
-
-    memset(&global.root, 0, sizeof(global.root));
-    global.root.nid = FUSE_ROOT_ID; /* 1 */
-    global.root.refcount = 2;
-    global.root.namelen = strlen(source_path);
-    global.root.name = strdup(source_path);
-    global.root.userid = userid;
-    global.root.uid = AID_ROOT;
-    global.root.under_android = false;
-
-    // Clang static analyzer think strcpy potentially overwrites other fields
-    // in global. Use snprintf() to mute the false warning.
-    snprintf(global.source_path, sizeof(global.source_path), "%s", source_path);
-
-    if (multi_user) {
-        global.root.perm = PERM_PRE_ROOT;
-        snprintf(global.obb_path, sizeof(global.obb_path), "%s/obb", source_path);
-    } else {
-        global.root.perm = PERM_ROOT;
-        snprintf(global.obb_path, sizeof(global.obb_path), "%s/Android/obb", source_path);
-    }
-
-    fuse_default.global = &global;
-    fuse_read.global = &global;
-    fuse_write.global = &global;
-
-    global.fuse_default = &fuse_default;
-    global.fuse_read = &fuse_read;
-    global.fuse_write = &fuse_write;
-
-    snprintf(fuse_default.dest_path, PATH_MAX, "/mnt/runtime/default/%s", label);
-    snprintf(fuse_read.dest_path, PATH_MAX, "/mnt/runtime/read/%s", label);
-    snprintf(fuse_write.dest_path, PATH_MAX, "/mnt/runtime/write/%s", label);
-
-    handler_default.fuse = &fuse_default;
-    handler_read.fuse = &fuse_read;
-    handler_write.fuse = &fuse_write;
-
-    handler_default.token = 0;
-    handler_read.token = 1;
-    handler_write.token = 2;
-
-    umask(0);
-
-    if (multi_user) {
-        /* Multi-user storage is fully isolated per user, so "other"
-         * permissions are completely masked off. */
-        if (fuse_setup(&fuse_default, AID_SDCARD_RW, 0006)
-                || fuse_setup(&fuse_read, AID_EVERYBODY, 0027)
-                || fuse_setup(&fuse_write, AID_EVERYBODY, full_write ? 0007 : 0027)) {
-            PLOG(FATAL) << "failed to fuse_setup";
-        }
-    } else {
-        /* Physical storage is readable by all users on device, but
-         * the Android directories are masked off to a single user
-         * deep inside attr_from_stat(). */
-        if (fuse_setup(&fuse_default, AID_SDCARD_RW, 0006)
-                || fuse_setup(&fuse_read, AID_EVERYBODY, full_write ? 0027 : 0022)
-                || fuse_setup(&fuse_write, AID_EVERYBODY, full_write ? 0007 : 0022)) {
-            PLOG(FATAL) << "failed to fuse_setup";
-        }
-    }
-
-    // Will abort if priv-dropping fails.
-    drop_privs(uid, gid);
-
-    if (multi_user) {
-        fs_prepare_dir(global.obb_path, 0775, uid, gid);
-    }
-
-    if (pthread_create(&thread_default, NULL, start_handler, &handler_default)
-            || pthread_create(&thread_read, NULL, start_handler, &handler_read)
-            || pthread_create(&thread_write, NULL, start_handler, &handler_write)) {
-        LOG(FATAL) << "failed to pthread_create";
-    }
-
-    watch_package_list(&global);
-    LOG(FATAL) << "terminated prematurely";
-}
-
 static bool sdcardfs_setup(const std::string& source_path, const std::string& dest_path,
                            uid_t fsuid, gid_t fsgid, bool multi_user, userid_t userid, gid_t gid,
                            mode_t mask, bool derive_gid, bool default_normal) {
@@ -407,41 +147,6 @@
     exit(0);
 }
 
-static bool supports_sdcardfs(void) {
-    std::string filesystems;
-    if (!android::base::ReadFileToString("/proc/filesystems", &filesystems)) {
-        PLOG(ERROR) << "Could not read /proc/filesystems";
-        return false;
-    }
-    for (const auto& fs : android::base::Split(filesystems, "\n")) {
-        if (fs.find("sdcardfs") != std::string::npos) return true;
-    }
-    return false;
-}
-
-static bool should_use_sdcardfs(void) {
-    char property[PROPERTY_VALUE_MAX];
-
-    // Allow user to have a strong opinion about state
-    property_get(PROP_SDCARDFS_USER, property, "");
-    if (!strcmp(property, "force_on")) {
-        LOG(WARNING) << "User explicitly enabled sdcardfs";
-        return supports_sdcardfs();
-    } else if (!strcmp(property, "force_off")) {
-        LOG(WARNING) << "User explicitly disabled sdcardfs";
-        return false;
-    }
-
-    // Fall back to device opinion about state
-    if (property_get_bool(PROP_SDCARDFS_DEVICE, true)) {
-        LOG(WARNING) << "Device explicitly enabled sdcardfs";
-        return supports_sdcardfs();
-    } else {
-        LOG(WARNING) << "Device explicitly disabled sdcardfs";
-        return false;
-    }
-}
-
 static int usage() {
     LOG(ERROR) << "usage: sdcard [OPTIONS] <source_path> <label>"
                << "    -u: specify UID to run as"
@@ -536,11 +241,7 @@
         sleep(1);
     }
 
-    if (should_use_sdcardfs()) {
-        run_sdcardfs(source_path, label, uid, gid, userid, multi_user, full_write, derive_gid,
-                     default_normal);
-    } else {
-        run(source_path, label, uid, gid, userid, multi_user, full_write);
-    }
+    run_sdcardfs(source_path, label, uid, gid, userid, multi_user, full_write, derive_gid,
+                 default_normal);
     return 1;
 }