fs_mgr: introduce fs_mgr_format to format wiped partitions
Move fastboot's format logic into fs_mgr, to consolidate the knowledge
about how to do this (and when to wipe metadata).
Try to format these formattable paritions if they are wiped.
If formatting fails, we will fall out to let recovery mode handle it.
Bug: 20082763
Change-Id: I397cc197550e78d932e8a154fd234695c46dbe7b
diff --git a/fs_mgr/Android.mk b/fs_mgr/Android.mk
index 61bf1ee..0ec6c4b 100644
--- a/fs_mgr/Android.mk
+++ b/fs_mgr/Android.mk
@@ -4,8 +4,12 @@
include $(CLEAR_VARS)
LOCAL_SRC_FILES:= fs_mgr.c fs_mgr_verity.c fs_mgr_fstab.c
+LOCAL_SRC_FILES += fs_mgr_format.c
-LOCAL_C_INCLUDES := $(LOCAL_PATH)/include
+LOCAL_C_INCLUDES := $(LOCAL_PATH)/include \
+ system/vold \
+ system/extras/ext4_utils \
+ external/openssl/include
LOCAL_MODULE:= libfs_mgr
LOCAL_STATIC_LIBRARIES := liblogwrap libmincrypt libext4_utils_static
@@ -35,6 +39,7 @@
LOCAL_UNSTRIPPED_PATH := $(TARGET_ROOT_OUT_UNSTRIPPED)
LOCAL_STATIC_LIBRARIES := libfs_mgr liblogwrap libcutils liblog libc libmincrypt libext4_utils_static
+LOCAL_STATIC_LIBRARIES += libsparse_static libz libselinux
LOCAL_CFLAGS := -Werror
diff --git a/fs_mgr/fs_mgr.c b/fs_mgr/fs_mgr.c
index ad02922..8533ff6 100644
--- a/fs_mgr/fs_mgr.c
+++ b/fs_mgr/fs_mgr.c
@@ -40,6 +40,9 @@
#include "mincrypt/sha.h"
#include "mincrypt/sha256.h"
+#include "ext4_utils.h"
+#include "wipe.h"
+
#include "fs_mgr_priv.h"
#include "fs_mgr_priv_verity.h"
@@ -380,6 +383,8 @@
}
}
int last_idx_inspected;
+ int top_idx = i;
+
mret = mount_with_alternatives(fstab, i, &last_idx_inspected, &attempted_idx);
i = last_idx_inspected;
mount_errno = errno;
@@ -409,10 +414,38 @@
continue;
}
- /* mount(2) returned an error, check if it's encryptable and deal with it */
+ /* mount(2) returned an error, handle the encryptable/formattable case */
+ bool wiped = partition_wiped(fstab->recs[top_idx].blk_device);
+ if (mret && mount_errno != EBUSY && mount_errno != EACCES &&
+ fs_mgr_is_formattable(&fstab->recs[top_idx]) && wiped) {
+ /* top_idx and attempted_idx point at the same partition, but sometimes
+ * at two different lines in the fstab. Use the top one for formatting
+ * as that is the preferred one.
+ */
+ ERROR("%s(): %s is wiped and %s %s is formattable. Format it.\n", __func__,
+ fstab->recs[top_idx].blk_device, fstab->recs[top_idx].mount_point,
+ fstab->recs[top_idx].fs_type);
+ if (fs_mgr_is_encryptable(&fstab->recs[top_idx]) &&
+ strcmp(fstab->recs[top_idx].key_loc, KEY_IN_FOOTER)) {
+ int fd = open(fstab->recs[top_idx].key_loc, O_WRONLY, 0644);
+ if (fd >= 0) {
+ INFO("%s(): also wipe %s\n", __func__, fstab->recs[top_idx].key_loc);
+ wipe_block_device(fd, get_file_size(fd));
+ close(fd);
+ } else {
+ ERROR("%s(): %s wouldn't open (%s)\n", __func__,
+ fstab->recs[top_idx].key_loc, strerror(errno));
+ }
+ }
+ if (fs_mgr_do_format(&fstab->recs[top_idx]) == 0) {
+ /* Let's replay the mount actions. */
+ i = top_idx - 1;
+ continue;
+ }
+ }
if (mret && mount_errno != EBUSY && mount_errno != EACCES &&
fs_mgr_is_encryptable(&fstab->recs[attempted_idx])) {
- if(partition_wiped(fstab->recs[attempted_idx].blk_device)) {
+ if (wiped) {
ERROR("%s(): %s is wiped and %s %s is encryptable. Suggest recovery...\n", __func__,
fstab->recs[attempted_idx].blk_device, fstab->recs[attempted_idx].mount_point,
fstab->recs[attempted_idx].fs_type);
diff --git a/fs_mgr/fs_mgr_format.c b/fs_mgr/fs_mgr_format.c
new file mode 100644
index 0000000..b5b92b5
--- /dev/null
+++ b/fs_mgr/fs_mgr_format.c
@@ -0,0 +1,119 @@
+/*
+ * Copyright (C) 2015 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 <stdio.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <sys/wait.h>
+#include <errno.h>
+#include <cutils/partition_utils.h>
+#include <sys/mount.h>
+#include "ext4_utils.h"
+#include "ext4.h"
+#include "make_ext4fs.h"
+#include "fs_mgr_priv.h"
+
+extern struct fs_info info; /* magic global from ext4_utils */
+extern void reset_ext4fs_info();
+
+static int format_ext4(char *fs_blkdev, char *fs_mnt_point)
+{
+ unsigned int nr_sec;
+ int fd, rc = 0;
+
+ if ((fd = open(fs_blkdev, O_WRONLY, 0644)) < 0) {
+ ERROR("Cannot open block device. %s\n", strerror(errno));
+ return -1;
+ }
+
+ if ((ioctl(fd, BLKGETSIZE, &nr_sec)) == -1) {
+ ERROR("Cannot get block device size. %s\n", strerror(errno));
+ close(fd);
+ return -1;
+ }
+
+ /* Format the partition using the calculated length */
+ reset_ext4fs_info();
+ info.len = ((off64_t)nr_sec * 512);
+
+ /* Use make_ext4fs_internal to avoid wiping an already-wiped partition. */
+ rc = make_ext4fs_internal(fd, NULL, fs_mnt_point, 0, 0, 0, 0, 0, 0, 0, 0, NULL);
+ if (rc) {
+ ERROR("make_ext4fs returned %d.\n", rc);
+ }
+ close(fd);
+
+ return rc;
+}
+
+static int format_f2fs(char *fs_blkdev)
+{
+ char * args[3];
+ int pid;
+ int rc = 0;
+
+ args[0] = (char *)"/sbin/mkfs.f2fs";
+ args[1] = fs_blkdev;
+ args[2] = (char *)0;
+
+ pid = fork();
+ if (pid < 0) {
+ return pid;
+ }
+ if (!pid) {
+ /* This doesn't return */
+ execv("/sbin/mkfs.f2fs", args);
+ exit(1);
+ }
+ for(;;) {
+ pid_t p = waitpid(pid, &rc, 0);
+ if (p != pid) {
+ ERROR("Error waiting for child process - %d\n", p);
+ rc = -1;
+ break;
+ }
+ if (WIFEXITED(rc)) {
+ rc = WEXITSTATUS(rc);
+ INFO("%s done, status %d\n", args[0], rc);
+ if (rc) {
+ rc = -1;
+ }
+ break;
+ }
+ ERROR("Still waiting for %s...\n", args[0]);
+ }
+
+ return rc;
+}
+
+int fs_mgr_do_format(struct fstab_rec *fstab)
+{
+ int rc = -EINVAL;
+
+ ERROR("%s: Format %s as '%s'.\n", __func__, fstab->blk_device, fstab->fs_type);
+
+ if (!strncmp(fstab->fs_type, "f2fs", 4)) {
+ rc = format_f2fs(fstab->blk_device);
+ } else if (!strncmp(fstab->fs_type, "ext4", 4)) {
+ rc = format_ext4(fstab->blk_device, fstab->mount_point);
+ } else {
+ ERROR("File system type '%s' is not supported\n", fstab->fs_type);
+ }
+
+ return rc;
+}
diff --git a/fs_mgr/fs_mgr_fstab.c b/fs_mgr/fs_mgr_fstab.c
index ab8f128..edd9591 100644
--- a/fs_mgr/fs_mgr_fstab.c
+++ b/fs_mgr/fs_mgr_fstab.c
@@ -68,6 +68,7 @@
{ "zramsize=", MF_ZRAMSIZE },
{ "verify", MF_VERIFY },
{ "noemulatedsd", MF_NOEMULATEDSD },
+ { "formattable", MF_FORMATTABLE },
{ "defaults", 0 },
{ 0, 0 },
};
@@ -432,3 +433,8 @@
{
return fstab->fs_mgr_flags & MF_NOEMULATEDSD;
}
+
+int fs_mgr_is_formattable(struct fstab_rec *fstab)
+{
+ return fstab->fs_mgr_flags & (MF_FORMATTABLE);
+}
diff --git a/fs_mgr/fs_mgr_priv.h b/fs_mgr/fs_mgr_priv.h
index 34938fa..fd58306 100644
--- a/fs_mgr/fs_mgr_priv.h
+++ b/fs_mgr/fs_mgr_priv.h
@@ -75,6 +75,7 @@
#define MF_FORCECRYPT 0x400
#define MF_NOEMULATEDSD 0x800 /* no emulated sdcard daemon, sd card is the only
external storage */
+#define MF_FORMATTABLE 0x1000
#define DM_BUF_SIZE 4096
diff --git a/fs_mgr/include/fs_mgr.h b/fs_mgr/include/fs_mgr.h
index 5e2ff41..5a6ad2d 100644
--- a/fs_mgr/include/fs_mgr.h
+++ b/fs_mgr/include/fs_mgr.h
@@ -84,7 +84,11 @@
int fs_mgr_is_verified(struct fstab_rec *fstab);
int fs_mgr_is_encryptable(struct fstab_rec *fstab);
int fs_mgr_is_noemulatedsd(struct fstab_rec *fstab);
+int fs_mgr_is_formattable(struct fstab_rec *fstab);
int fs_mgr_swapon_all(struct fstab *fstab);
+
+int fs_mgr_do_format(struct fstab_rec *fstab);
+
#ifdef __cplusplus
}
#endif
diff --git a/init/Android.mk b/init/Android.mk
index 489dc93..228e645 100644
--- a/init/Android.mk
+++ b/init/Android.mk
@@ -45,7 +45,9 @@
libc \
libselinux \
libmincrypt \
- libext4_utils_static
+ libext4_utils_static \
+ libsparse_static \
+ libz
LOCAL_ADDITIONAL_DEPENDENCIES += $(LOCAL_PATH)/Android.mk
diff --git a/init/devices.c b/init/devices.c
index 1012fee..73fe223 100644
--- a/init/devices.c
+++ b/init/devices.c
@@ -564,7 +564,7 @@
make_device(devpath, path, block, major, minor, (const char **)links);
if (links) {
for (i = 0; links[i]; i++)
- make_link(devpath, links[i]);
+ make_link_init(devpath, links[i]);
}
}
diff --git a/init/util.c b/init/util.c
index e1a3ee3..12cb11d 100644
--- a/init/util.c
+++ b/init/util.c
@@ -335,7 +335,7 @@
}
}
-void make_link(const char *oldpath, const char *newpath)
+void make_link_init(const char *oldpath, const char *newpath)
{
int ret;
char buf[256];
diff --git a/init/util.h b/init/util.h
index 04b8129..a7e7c8b 100644
--- a/init/util.h
+++ b/init/util.h
@@ -33,7 +33,7 @@
int mkdir_recursive(const char *pathname, mode_t mode);
void sanitize(char *p);
-void make_link(const char *oldpath, const char *newpath);
+void make_link_init(const char *oldpath, const char *newpath);
void remove_link(const char *oldpath, const char *newpath);
int wait_for_file(const char *filename, int timeout);
void open_devnull_stdio(void);
