高通 SC60 SDM450 自动匹配flash 容量大小补丁
问题：SC60智能通信模组，Android9.0系统，同时会采购1+8和2+16的配置，但是软件上面统一都只是显示8G的ROM，如何实现同一软件自动识别EMMC容量大小并正确显示？
解决方案：
源码补丁见附件中（移远提供补丁）：
diff --git a/device/qcom/msm8953_64/fstabs-4.9/fstab_AB_variant.qti b/device/qcom/msm8953_64/fstabs-4.9/fstab_AB_variant.qti
index f750e49..a0b24bf 100644
--- a/device/qcom/msm8953_64/fstabs-4.9/fstab_AB_variant.qti
+++ b/device/qcom/msm8953_64/fstabs-4.9/fstab_AB_variant.qti
@@ -34,7 +34,7 @@
#<src> <mnt_point><type><mnt_flags and options> <fs_mgr_flags>
/dev/block/bootdevice/by-name/system / ext4 ro,barrier=1,discard wait,slotselect,avb
-/dev/block/bootdevice/by-name/userdata /data ext4 noatime,nosuid,nodev,barrier=1,noauto_da_alloc,discardwait,forceencrypt=footer,quota,reservedsize=128M
+/dev/block/bootdevice/by-name/userdata /data ext4 noatime,nosuid,nodev,barrier=1,noauto_da_alloc,discard,resize wait,forceencrypt=footer,quota,reservedsize=128M
/devices/platform/soc/7864900.sdhci/mmc_host* /storage/sdcard1 vfatnosuid,nodev wait,voldmanaged=sdcard1:auto,noemulatedsd,encryptable=footer
/devices/platform/soc/7000000.ssusb/7000000.dwc3/xhci-hcd.0.auto*/storage/usbotgvfatnosuid,nodevwait,voldmanaged=usbotg:auto
/devices/soc/7864900.sdhci/mmc_host* /storage/sdcard1 vfatnosuid,nodev wait,voldmanaged=sdcard1:auto,noemulatedsd,encryptable=footer
diff --git a/device/qcom/msm8953_64/fstabs-4.9/fstab_non_AB_variant.qti b/device/qcom/msm8953_64/fstabs-4.9/fstab_non_AB_variant.qti
index cef6107..740f9fe 100644
--- a/device/qcom/msm8953_64/fstabs-4.9/fstab_non_AB_variant.qti
+++ b/device/qcom/msm8953_64/fstabs-4.9/fstab_non_AB_variant.qti
@@ -34,7 +34,7 @@
#<src> <mnt_point><type><mnt_flags and options> <fs_mgr_flags>
/dev/block/bootdevice/by-name/system / ext4 ro,barrier=1,discard wait,avb
-/dev/block/bootdevice/by-name/userdata /data ext4 noatime,nosuid,nodev,barrier=1,noauto_da_alloc,discardwait,forceencrypt=footer,quota,reservedsize=128M
+/dev/block/bootdevice/by-name/userdata /data ext4 noatime,nosuid,nodev,barrier=1,noauto_da_alloc,discard,resize wait,forceencrypt=footer,quota,reservedsize=128M
/devices/platform/soc/7864900.sdhci/mmc_host* /storage/sdcard1 vfatnosuid,nodev wait,voldmanaged=sdcard1:auto,noemulatedsd,encryptable=footer
/devices/platform/soc/7000000.ssusb/7000000.dwc3/xhci-hcd.0.auto*/storage/usbotgvfatnosuid,nodevwait,voldmanaged=usbotg:auto
/devices/soc/7864900.sdhci/mmc_host* /storage/sdcard1 vfatnosuid,nodev wait,voldmanaged=sdcard1:auto,noemulatedsd,encryptable=footer
diff --git a/system/core/fs_mgr/fs_mgr.cpp b/system/core/fs_mgr/fs_mgr.cpp
index 29f165f..e511c5e 100755
--- a/system/core/fs_mgr/fs_mgr.cpp
+++ b/system/core/fs_mgr/fs_mgr.cpp
@@ -61,6 +61,11 @@
#include "fs_mgr_priv.h"
#include "fs_mgr_priv_dm_ioctl.h"
+#ifdef FS_MGR_RESIZE_ENABLE
+#include "cryptfs.h"
+#define RESIZE2FS_BIN "/system/bin/resize2fs"
+#endif
+
#define KEY_LOC_PROP "ro.crypto.keyfile.userdata"
#define KEY_IN_FOOTER"footer"
@@ -416,6 +421,72 @@ static void tune_encrypt(const char* blk_device, const struct fstab_rec* rec,
}
}
+#ifdef FS_MGR_RESIZE_ENABLE
+static void resize_fs(const std::string& blk_device, const std::string& fs_type,
+ const std::string& key_loc) {
+ uint64_t device_sz;
+ uint64_t device_ss;
+ int status = 0;
+ int ret = 0;
+
+ android::base::unique_fd fd(TEMP_FAILURE_RETRY(open(blk_device.c_str(), O_RDONLY | O_CLOEXEC)));
+
+ if (fd < 0) {
+ PERROR << "Failed to open '" << blk_device << "'";
+ return;
+ }
+
+ /* Cannot use BLKGETSIZE to get the number of sectors,
+ * because need to do device_sz -= CRYPT_FOOTER_OFFSET
+ */
+ if ((ioctl(fd, BLKGETSIZE64, &device_sz)) == -1) {
+ PERROR << "(BLKGETSIZE64) Can't get '" << blk_device << "' size";
+ return;
+ }
+
+ if ((ioctl(fd, BLKSSZGET, &device_ss)) == -1) {
+ PERROR << "(BLKSSZGET) Can't get '" << blk_device << "' size";
+ return;
+ }
+
+ /* Format the partition using the calculated length */
+ if (!strcmp(key_loc.c_str(), KEY_IN_FOOTER))
+ device_sz -= CRYPT_FOOTER_OFFSET;
+
+ if (is_extfs(fs_type)) {
+ if (access(RESIZE2FS_BIN, X_OK)) {
+ LINFO << "Not running " << RESIZE2FS_BIN << " on " << blk_device
+ << " (executable not in system image)";
+ } else {
+ std::string size_kb_str(android::base::StringPrintf("%" PRIu64 "K", device_sz / 1024));
+
+ LINFO << "Running " << RESIZE2FS_BIN << " on " << blk_device;
+
+ /* extX cmd */
+ const char *resize2fs_argv[] = {
+ RESIZE2FS_BIN,
+ "-f",
+ blk_device.c_str(),
+ size_kb_str.c_str()
+ };
+
+ ret = android_fork_execvp_ext(ARRAY_SIZE(resize2fs_argv),
+ const_cast<char **>(resize2fs_argv),
+ &status, true, LOG_KLOG,
+ false, NULL, NULL, 0);
+
+ if (ret < 0) {
+ /* No need to check for error in fork, we can't really handle it now */
+ LERROR << "Failed trying to run " << RESIZE2FS_BIN;
+ return;
+ }
+ }
+ }
+}
+#endif
+
+
+
//
// Prepare the filesystem on the given block device to be mounted.
//
@@ -452,6 +523,14 @@ static int prepare_fs_for_mount(const char* blk_device, const struct fstab_rec*
check_fs(blk_device, rec->fs_type, rec->mount_point, &fs_stat);
}
+#ifdef FS_MGR_RESIZE_ENABLE
+ if ((rec->flags & MF_RESIZE) && !strcmp(blk_device, rec->blk_device)) {
+ resize_fs(blk_device, rec->fs_type, rec->key_loc);
+ check_fs(blk_device, rec->fs_type, rec->mount_point, &fs_stat);
+ }
+ LERROR << "admin Enter addprepare_fs_for_mount FS_MGR_RESIZE_ENABLE" << fs_stat;
+#endif
+
if (is_extfs(rec->fs_type) && (rec->fs_mgr_flags & (MF_RESERVEDSIZE | MF_FILEENCRYPTION))) {
struct ext4_super_block sb;
diff --git a/system/core/fs_mgr/fs_mgr_fstab.cpp b/system/core/fs_mgr/fs_mgr_fstab.cpp
old mode 100644
new mode 100755
index cc1fc93..d70600c
--- a/system/core/fs_mgr/fs_mgr_fstab.cpp
+++ b/system/core/fs_mgr/fs_mgr_fstab.cpp
@@ -73,6 +73,9 @@ static struct flag_list mount_flags[] = {
{ "private", MS_PRIVATE },
{ "slave", MS_SLAVE },
{ "shared", MS_SHARED },
+#ifdef FS_MGR_RESIZE_ENABLE
+ {"resize", MF_RESIZE},
+#endif
{ "defaults", 0 },
{ 0, 0 },
};
diff --git a/system/core/fs_mgr/fs_mgr_priv.h b/system/core/fs_mgr/fs_mgr_priv.h
old mode 100644
new mode 100755
index c1cc3be..2150c60
--- a/system/core/fs_mgr/fs_mgr_priv.h
+++ b/system/core/fs_mgr/fs_mgr_priv.h
@@ -33,6 +33,11 @@
*/
#define FS_MGR_CHECK(x) CHECK(x) << "in libfs_mgr "
+#define FS_MGR_RESIZE_ENABLE
+#ifdef FS_MGR_RESIZE_ENABLE
+#define MF_RESIZE 0x10000000
+#endif
+
#define FS_MGR_TAG ""
// Logs a message to kernel
diff --git a/system/sepolicy/prebuilts/api/26.0/private/file_contexts b/system/sepolicy/prebuilts/api/26.0/private/file_contexts
index 4485b95..dd6985f 100644
--- a/system/sepolicy/prebuilts/api/26.0/private/file_contexts
+++ b/system/sepolicy/prebuilts/api/26.0/private/file_contexts
@@ -537,3 +537,4 @@
/mnt/user(/.*)? u:object_r:mnt_user_file:s0
/mnt/runtime(/.*)? u:object_r:storage_file:s0
/storage(/.*)? u:object_r:storage_file:s0
+/system/bin/resize2fs u:object_r:fsck_exec:s0
diff --git a/system/sepolicy/prebuilts/api/27.0/private/file_contexts b/system/sepolicy/prebuilts/api/27.0/private/file_contexts
index 5369758..2f04e4c 100644
--- a/system/sepolicy/prebuilts/api/27.0/private/file_contexts
+++ b/system/sepolicy/prebuilts/api/27.0/private/file_contexts
@@ -468,3 +468,4 @@
/mnt/user(/.*)? u:object_r:mnt_user_file:s0
/mnt/runtime(/.*)? u:object_r:storage_file:s0
/storage(/.*)? u:object_r:storage_file:s0
+/system/bin/resize2fs u:object_r:fsck_exec:s0
diff --git a/system/sepolicy/prebuilts/api/28.0/private/file_contexts b/system/sepolicy/prebuilts/api/28.0/private/file_contexts
index 32eb3f1..6329d5c 100644
--- a/system/sepolicy/prebuilts/api/28.0/private/file_contexts
+++ b/system/sepolicy/prebuilts/api/28.0/private/file_contexts
@@ -541,3 +541,4 @@
#############################
# mount point for read-write vendor partitions
/mnt/vendor(/.*)? u:object_r:mnt_vendor_file:s0
+/system/bin/resize2fs u:object_r:fsck_exec:s0
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