!1027 support A/B partition startup

Merge pull request !1027 from cheng_jinsong/slot

interfaces/innerkits/fs_manager/fstab.c

@@ -338,6 +338,16 @@ int GetBlockDeviceByMountPoint(const char *mountPoint, const Fstab *fstab, char
     return 0;
 }
 
+int GetBlockDeviceByName(const char *deviceName, const Fstab *fstab, char* miscDev, size_t size)
+{
+    for (FstabItem *item = fstab->head; item != NULL; item = item->next) {
+        if (strstr(item->deviceName, deviceName) != NULL) {
+            BEGET_CHECK_RETURN_VALUE(strcpy_s(miscDev, size, item->deviceName) != 0, 0);
+        }
+    }
+    return -1;
+}
+
 static const struct MountFlags mountFlags[] = {
     { "noatime", MS_NOATIME },
     { "noexec", MS_NOEXEC },
@@ -487,21 +497,114 @@ unsigned long GetMountFlags(char *mountFlag, char *fsSpecificData, size_t fsSpec
     return flags;
 }
 
-int GetBlockDevicePath(const char *partName, char *path, int size)
+int GetBlockDevicePath(const char *partName, char *path, size_t size)
 {
-    char *fstabFile = GetFstabFile(path, size);
-    if (fstabFile == NULL) {
-        return -1;
-    }
-    Fstab *fstab = ReadFstabFromFile(fstabFile, false);
+    Fstab *fstab = LoadFstabFromCommandLine();
     if (fstab == NULL) {
-        return -1;
+        BEGET_LOGI("fstab not found from cmdline, try to get it from file");
+        char *fstabFile = GetFstabFile(path, size);
+        BEGET_CHECK_RETURN_VALUE(fstabFile != NULL, -1);
+        fstab = ReadFstabFromFile(fstabFile, false);
     }
+    BEGET_CHECK_RETURN_VALUE(fstab != NULL, -1);
     int ret = GetBlockDeviceByMountPoint(partName, fstab, path, size);
+    BEGET_INFO_CHECK(ret == 0, ret = GetBlockDeviceByName(partName, fstab, path, size),
+        "mount point not found, try to get it by device name");
     ReleaseFstab(fstab);
     return ret;
 }
 
+#define OHOS_REQUIRED_MOUNT_PREFIX "ohos.required_mount."
+/*
+ * Fstab includes block device node, mount point, file system type, MNT_ Flags and options.
+ * We separate them by spaces in fstab.required file, but the separator is '@' in CmdLine.
+ * The prefix "ohos.required_mount." is the flag of required fstab information in CmdLine.
+ * Format as shown below:
+ * <block device>@<mount point>@<fstype>@<mount options>@<fstab options>
+ * e.g.
+ * ohos.required_mount.system=/dev/block/xxx/by-name/system@/usr@ext4@ro,barrier=1@wait,required
+ */
+static int ParseRequiredMountInfo(const char *item, Fstab *fstab)
+{
+    char mountOptions[MAX_BUFFER_LEN] = {};
+    char partName[NAME_SIZE] = {};
+    // Sanity checks
+    BEGET_CHECK(!(item == NULL || *item == '\0' || fstab == NULL), return -1);
+
+    char *p = NULL;
+    const char *q = item;
+    if ((p = strstr(item, "=")) != NULL) {
+        q = item + strlen(OHOS_REQUIRED_MOUNT_PREFIX); // Get partition name
+        BEGET_CHECK(!(q == NULL || *q == '\0' || (p - q) <= 0), return -1);
+        BEGET_ERROR_CHECK(strncpy_s(partName, NAME_SIZE -1, q, p - q) == EOK,
+            return -1, "Failed to copy required partition name");
+        p++; // skip '='
+        BEGET_ERROR_CHECK(strncpy_s(mountOptions, MAX_BUFFER_LEN -1, p, strlen(p)) == EOK,
+            return -1, "Failed to copy required mount info: %s", item);
+    }
+    BEGET_LOGV("Mount option of partition %s is [%s]", partName, mountOptions);
+    if (ParseFstabPerLine(mountOptions, fstab, false, "@") < 0) {
+        BEGET_LOGE("Failed to parse mount options of partition \' %s \', options: %s", partName, mountOptions);
+        return -1;
+    }
+    return 0;
+}
+
+Fstab* LoadFstabFromCommandLine(void)
+{
+    Fstab *fstab = NULL;
+    char *cmdline = ReadFileData(BOOT_CMD_LINE);
+    bool isDone = false;
+
+    BEGET_ERROR_CHECK(cmdline != NULL, return NULL, "Read from \'/proc/cmdline\' failed, err = %d", errno);
+    TrimTail(cmdline, '\n');
+    BEGET_ERROR_CHECK((fstab = (Fstab *)calloc(1, sizeof(Fstab))) != NULL, return NULL,
+        "Allocate memory for FS table failed, err = %d", errno);
+    char *start = cmdline;
+    char *end = start + strlen(cmdline);
+    while (start < end) {
+        char *token = strstr(start, " ");
+        if (token == NULL) {
+            break;
+        }
+
+        // Startswith " "
+        if (token == start) {
+            start++;
+            continue;
+        }
+        *token = '\0';
+        if (strncmp(start, OHOS_REQUIRED_MOUNT_PREFIX,
+            strlen(OHOS_REQUIRED_MOUNT_PREFIX)) != 0) {
+            start = token + 1;
+            continue;
+        }
+        isDone = true;
+        if (ParseRequiredMountInfo(start, fstab) < 0) {
+            BEGET_LOGE("Failed to parse \' %s \'", start);
+            isDone = false;
+            break;
+        }
+        start = token + 1;
+    }
+
+    // handle last one
+    if (start < end) {
+        if (strncmp(start, OHOS_REQUIRED_MOUNT_PREFIX,
+            strlen(OHOS_REQUIRED_MOUNT_PREFIX)) == 0 &&
+            ParseRequiredMountInfo(start, fstab) < 0) {
+            BEGET_LOGE("Failed to parse \' %s \'", start);
+            isDone = false;
+        }
+    }
+
+    if (!isDone) {
+        ReleaseFstab(fstab);
+        fstab = NULL;
+    }
+    free(cmdline);
+    return fstab;
+}
 #ifdef __cplusplus
 #if __cplusplus
 }

interfaces/innerkits/fs_manager/fstab_mount.c

@@ -21,9 +21,11 @@
 #include <sys/stat.h>
 #include <sys/wait.h>
 #include <unistd.h>
+#include <linux/limits.h>
 #include "beget_ext.h"
 #include "fs_manager/fs_manager.h"
 #include "init_utils.h"
+#include "param/init_param.h"
 #include "securec.h"
 
 #ifdef __cplusplus
@@ -35,6 +37,8 @@ extern "C" {
 #define FS_MANAGER_BUFFER_SIZE 512
 #define BLOCK_SIZE_BUFFER (64)
 #define RESIZE_BUFFER_SIZE 1024
+const off_t MISC_PARTITION_ACTIVE_SLOT_OFFSET = 1400;
+const off_t MISC_PARTITION_ACTIVE_SLOT_SIZE = 4;
 
 bool IsSupportedFilesystem(const char *fsType)
 {
@@ -285,6 +289,68 @@ static int Mount(const char *source, const char *target, const char *fsType,
     return rc;
 }
 
+static int GetSlotInfoFromParameter(const char *slotInfoName)
+{
+    char name[PARAM_NAME_LEN_MAX] = {0};
+    BEGET_ERROR_CHECK(sprintf_s(name, sizeof(name), "ohos.boot.%s", slotInfoName) > 0,
+        return -1, "Failed to format slot parameter name");
+    char value[PARAM_VALUE_LEN_MAX] = {0};
+    uint32_t valueLen = PARAM_VALUE_LEN_MAX;
+    return SystemGetParameter(name, value, &valueLen) == 0 ? atoi(value) : -1;
+}
+
+static int GetSlotInfoFromCmdLine(const char *slotInfoName)
+{
+    char value[MAX_BUFFER_LEN] = {0};
+    char *buffer = ReadFileData(BOOT_CMD_LINE);
+    BEGET_ERROR_CHECK(buffer != NULL, return -1, "Failed to read cmdline");
+    BEGET_ERROR_CHECK(GetProcCmdlineValue(slotInfoName, buffer, value, MAX_BUFFER_LEN) == 0,
+        free(buffer); buffer = NULL; return -1, "Failed to get %s value from cmdline", slotInfoName);
+    free(buffer);
+    buffer = NULL;
+    return atoi(value);
+}
+
+static int GetSlotInfoFromMisc(off_t offset, off_t size)
+{
+    char miscDev[MAX_BUFFER_LEN] = {0};
+    BEGET_ERROR_CHECK(GetBlockDevicePath("/misc", miscDev, MAX_BUFFER_LEN) == 0,
+        return -1, "Failed to get misc device");
+    int fd = open(miscDev, O_RDWR | O_CLOEXEC, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
+    BEGET_ERROR_CHECK(fd >= 0, return -1, "Failed to open misc device, errno %d", errno);
+    BEGET_ERROR_CHECK(lseek(fd, offset, SEEK_SET) >= 0, close(fd); return -1,
+        "Failed to lseek misc device fd, errno %d", errno);
+    int slotInfo = 0;
+    BEGET_ERROR_CHECK(read(fd, &slotInfo, size) == size, close(fd); return -1,
+        "Failed to read current slot from misc, errno %d", errno);
+    close(fd);
+    return slotInfo;
+}
+
+int GetBootSlots(void)
+{
+    int bootSlots = GetSlotInfoFromParameter("bootslots");
+    BEGET_CHECK_RETURN_VALUE(bootSlots <= 0, bootSlots);
+    BEGET_LOGI("No valid slot value found from parameter, try to get it from cmdline");
+    return GetSlotInfoFromCmdLine("bootslots");
+}
+
+int GetCurrentSlot(void)
+{
+    // get current slot from parameter
+    int currentSlot = GetSlotInfoFromParameter("currentslot");
+    BEGET_CHECK_RETURN_VALUE(currentSlot <= 0, currentSlot);
+    BEGET_LOGI("No valid slot value found from parameter, try to get it from cmdline");
+
+    // get current slot from cmdline
+    currentSlot = GetSlotInfoFromCmdLine("currentslot");
+    BEGET_CHECK_RETURN_VALUE(currentSlot <= 0, currentSlot);
+    BEGET_LOGI("No valid slot value found from cmdline, try to get it from misc");
+
+    // get current slot from misc
+    return GetSlotInfoFromMisc(MISC_PARTITION_ACTIVE_SLOT_OFFSET, MISC_PARTITION_ACTIVE_SLOT_SIZE);
+}
+
 int MountOneItem(FstabItem *item)
 {
     if (item == NULL) {
@@ -333,6 +399,21 @@ int MountOneItem(FstabItem *item)
     return rc;
 }
 
+static void AdjustPartitionNameByPartitionSlot(FstabItem *item)
+{
+    BEGET_CHECK_ONLY_RETURN(strstr(item->deviceName, "/system") != NULL ||
+        strstr(item->deviceName, "/vendor") != NULL);
+    char buffer[MAX_BUFFER_LEN] = {0};
+    int slot = GetCurrentSlot();
+    BEGET_ERROR_CHECK(slot > 0 && slot <= MAX_SLOT, slot = 1, "slot value %d is invalid, set default value", slot);
+    BEGET_INFO_CHECK(slot > 1, return, "default partition doesn't need to add suffix");
+    BEGET_ERROR_CHECK(sprintf_s(buffer, sizeof(buffer), "%s_%c", item->deviceName, 'a' + slot - 1) > 0,
+        return, "Failed to format partition name suffix, use default partition name");
+    free(item->deviceName);
+    item->deviceName = strdup(buffer);
+    BEGET_LOGI("partition name with slot suffix: %s", item->deviceName);
+}
+
 static int CheckRequiredAndMount(FstabItem *item, bool required)
 {
     int rc = 0;
@@ -341,6 +422,9 @@ static int CheckRequiredAndMount(FstabItem *item, bool required)
     }
     if (required) { // Mount partition during first startup.
         if (FM_MANAGER_REQUIRED_ENABLED(item->fsManagerFlags)) {
+            int bootSlots = GetBootSlots();
+            BEGET_INFO_CHECK(bootSlots <= 1, AdjustPartitionNameByPartitionSlot(item),
+                "boot slots is %d, now adjust partition name according to current slot", bootSlots);
             rc = MountOneItem(item);
         }
     } else { // Mount partition during second startup.

interfaces/innerkits/include/fs_manager/fs_manager.h

@@ -29,6 +29,8 @@ extern "C" {
 #define FS_MANAGER_CHECK  0x00000001
 #define FS_MANAGER_WAIT  0x00000002
 #define FS_MANAGER_REQUIRED  0x00000004
+#define NAME_SIZE 32
+#define MAX_SLOT 2
 
 #define VALID_FS_MANAGER_FLAGS (FS_MANAGER_CHECK | FS_MANAGER_WAIT | FS_MANAGER_REQUIRED)
 #define FS_MANAGER_FLAGS_ENABLED(fsMgrFlags, flag) (((fsMgrFlags) & FS_MANAGER_##flag) != 0)
@@ -56,6 +58,21 @@ typedef struct {
     struct FstabItem *head;
 } Fstab;
 
+typedef enum SlotFlag {
+    UNBOOT = 0,
+    ACTIVE = 1,
+} SlotFlag;
+
+typedef struct SlotInfo {
+    int slotName;
+    char *slotSuffix;
+    SlotFlag slotFlag;
+    unsigned int retryCount;
+    unsigned int reserved;
+} SlotInfo;
+
+Fstab* LoadFstabFromCommandLine(void);
+int GetSlotInfo(void);
 void ReleaseFstab(Fstab *fstab);
 Fstab *ReadFstabFromFile(const char *file, bool procMounts);
 FstabItem *FindFstabItemForPath(Fstab fstab, const char *path);
@@ -63,6 +80,7 @@ FstabItem* FindFstabItemForMountPoint(Fstab fstab, const char *mp);
 int ParseFstabPerLine(char *str, Fstab *fstab, bool procMounts, const char *separator);
 
 int GetBlockDeviceByMountPoint(const char *mountPoint, const Fstab *fstab, char *deviceName, int nameLen);
+int GetBlockDeviceByName(const char *deviceName, const Fstab *fstab, char* miscDev, size_t size);
 bool IsSupportedFilesystem(const char *fsType);
 int DoFormat(const char *devPath, const char *fsType);
 int MountOneItem(FstabItem *item);
@@ -73,7 +91,7 @@ int UmountAllWithFstabFile(const char *file);
 unsigned long GetMountFlags(char *mountFlag, char *fsSpecificFlags, size_t fsSpecificFlagSize,
     const char *mountPoint);
 
-int GetBlockDevicePath(const char *partName, char *path, int size);
+int GetBlockDevicePath(const char *partName, char *path, size_t size);
 
 // Get fscrypt policy if exist
 int LoadFscryptPolicy(char *buf, size_t size);

services/begetctl/BUILD.gn

@@ -124,6 +124,14 @@ if (defined(ohos_lite)) {
       "sandbox",
       "dump_service",
     ]
+
+    if (product_name == "rk3568") {
+      sources += [ "partitionslot.cpp" ]
+      external_deps +=
+          [ "drivers_peripheral_partitionslot:libpartition_slot_manager" ]
+      symlink_target_name += [ "partitionslot" ]
+    }
+
     install_images = [ "system" ]
     install_enable = true
     part_name = "init"

services/begetctl/partitionslot.cpp

+/*
+ * Copyright (c) 2022 Huawei Device Co., Ltd.
+ * 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 <iostream>
+
+#include "begetctl.h"
+#include "partitionslot_manager.h"
+
+using namespace OHOS::HDI::Partitionslot::V1_0;
+const int32_t PARTITION_ARGC = 2;
+
+static int GetSlot(BShellHandle handle, int32_t argc, char *argv[])
+{
+    std::cout << "Command: partitionslot getslot" << std::endl;
+    int bootSlots = 0;
+    int currentSlot = PartitionSlotManager::GetInstance()->GetCurrentSlot(bootSlots);
+    std::cout << "The number of slots: " << bootSlots << "," <<  "current slot: " << currentSlot << std::endl;
+    return 0;
+}
+
+static int GetSuffix(BShellHandle handle, int32_t argc, char *argv[])
+{
+    if (argc != PARTITION_ARGC) {
+        BShellCmdHelp(handle, argc, argv);
+        return 0;
+    }
+    std::cout << "Command: partitionslot getsuffix" << std::endl;
+    int slot = atoi(argv[1]);
+    std::string suffix = "";
+    PartitionSlotManager::GetInstance()->GetSlotSuffix(slot, suffix);
+    std::cout << "The slot " << slot << " matches with suffix: " << suffix << std::endl;
+    return 0;
+}
+
+static int SetActiveSlot(BShellHandle handle, int32_t argc, char *argv[])
+{
+    if (argc != PARTITION_ARGC) {
+        BShellCmdHelp(handle, argc, argv);
+        return 0;
+    }
+    std::cout << "Command: partitionslot setactive" << std::endl;
+    int slot = atoi(argv[1]);
+    PartitionSlotManager::GetInstance()->SetActiveSlot(slot);
+    std::cout << "Set active slot: " << slot << std::endl;
+    return 0;
+}
+
+static int SetUnbootSlot(BShellHandle handle, int32_t argc, char *argv[])
+{
+    if (argc != PARTITION_ARGC) {
+        BShellCmdHelp(handle, argc, argv);
+        return 0;
+    }
+    std::cout << "Command: partitionslot setunboot" << std::endl;
+    int slot = atoi(argv[1]);
+    PartitionSlotManager::GetInstance()->SetSlotUnbootable(slot);
+    std::cout << "Set unboot slot: " << slot << std::endl;
+    return 0;
+}
+
+MODULE_CONSTRUCTOR(void)
+{
+    CmdInfo infos[] = {
+        {
+            (char *)"partitionslot", GetSlot, (char *)"get the number of slots and current slot",
+            (char *)"partitionslot getslot", (char *)"partitionslot getslot"
+        },
+        {
+            (char *)"partitionslot", GetSuffix, (char *)"get suffix that matches with the slot",
+            (char *)"partitionslot getsuffix [slot]", (char *)"partitionslot getsuffix"
+        },
+        {
+            (char *)"partitionslot", SetActiveSlot, (char *)"set active slot",
+            (char *)"partitionslot setactive [slot]", (char *)"partitionslot setactive"
+        },
+        {
+            (char *)"partitionslot", SetUnbootSlot, (char *)"set unboot slot",
+            (char *)"partitionslot setunboot [slot]", (char *)"partitionslot setunboot"
+        }
+    };
+    for (size_t i = sizeof(infos) / sizeof(infos[0]); i > 0; i--) {
+        BShellEnvRegitsterCmd(GetShellHandle(), &infos[i - 1]);
+    }
+}

services/init/standard/init_mount.c

@@ -32,98 +32,6 @@ int MountRequriedPartitions(const Fstab *fstab)
     return rc;
 }
 
-#define OHOS_REQUIRED_MOUNT_PREFIX "ohos.required_mount."
-/*
- * Fstab includes block device node, mount point, file system type, MNT_ Flags and options.
- * We separate them by spaces in fstab.required file, but the separator is '@' in CmdLine.
- * The prefix "ohos.required_mount." is the flag of required fstab information in CmdLine.
- * Format as shown below:
- * <block device>@<mount point>@<fstype>@<mount options>@<fstab options>
- * e.g.
- * ohos.required_mount.system=/dev/block/xxx/by-name/system@/usr@ext4@ro,barrier=1@wait,required
- */
-static int ParseRequiredMountInfo(const char *item, Fstab *fstab)
-{
-    char mountOptions[MAX_BUFFER_LEN] = {};
-    char partName[PARTITION_NAME_SIZE] = {};
-    // Sanity checks
-    INIT_CHECK(!(item == NULL || *item == '\0' || fstab == NULL), return -1);
-
-    char *p = NULL;
-    const char *q = item;
-    if ((p = strstr(item, "=")) != NULL) {
-        q = item + strlen(OHOS_REQUIRED_MOUNT_PREFIX); // Get partition name
-        INIT_CHECK(!(q == NULL || *q == '\0' || (p - q) <= 0), return -1);
-        INIT_ERROR_CHECK(strncpy_s(partName, PARTITION_NAME_SIZE -1, q, p - q) == EOK,
-            return -1, "Failed to copy required partition name");
-        p++; // skip '='
-        INIT_ERROR_CHECK(strncpy_s(mountOptions, MAX_BUFFER_LEN -1, p, strlen(p)) == EOK,
-            return -1, "Failed to copy required mount info: %s", item);
-    }
-    INIT_LOGV("Mount option of partition %s is [%s]", partName, mountOptions);
-    if (ParseFstabPerLine(mountOptions, fstab, false, "@") < 0) {
-        INIT_LOGE("Failed to parse mount options of partition \' %s \', options: %s", partName, mountOptions);
-        return -1;
-    }
-    return 0;
-}
-
-static Fstab* LoadFstabFromCommandLine(void)
-{
-    Fstab *fstab = NULL;
-    char *cmdline = ReadFileData(BOOT_CMD_LINE);
-    bool isDone = false;
-
-    INIT_ERROR_CHECK(cmdline != NULL, return NULL, "Read from \'/proc/cmdline\' failed, err = %d", errno);
-    TrimTail(cmdline, '\n');
-    INIT_ERROR_CHECK((fstab = (Fstab *)calloc(1, sizeof(Fstab))) != NULL, return NULL,
-        "Allocate memory for FS table failed, err = %d", errno);
-    char *start = cmdline;
-    char *end = start + strlen(cmdline);
-    while (start < end) {
-        char *token = strstr(start, " ");
-        if (token == NULL) {
-            break;
-        }
-
-        // Startswith " "
-        if (token == start) {
-            start++;
-            continue;
-        }
-        *token = '\0';
-        if (strncmp(start, OHOS_REQUIRED_MOUNT_PREFIX,
-            strlen(OHOS_REQUIRED_MOUNT_PREFIX)) != 0) {
-            start = token + 1;
-            continue;
-        }
-        isDone = true;
-        if (ParseRequiredMountInfo(start, fstab) < 0) {
-            INIT_LOGE("Failed to parse \' %s \'", start);
-            isDone = false;
-            break;
-        }
-        start = token + 1;
-    }
-
-    // handle last one
-    if (start < end) {
-        if (strncmp(start, OHOS_REQUIRED_MOUNT_PREFIX,
-            strlen(OHOS_REQUIRED_MOUNT_PREFIX)) == 0 &&
-            ParseRequiredMountInfo(start, fstab) < 0) {
-            INIT_LOGE("Failed to parse \' %s \'", start);
-            isDone = false;
-        }
-    }
-
-    if (!isDone) {
-        ReleaseFstab(fstab);
-        fstab = NULL;
-    }
-    free(cmdline);
-    return fstab;
-}
-
 Fstab* LoadRequiredFstab(void)
 {
     Fstab *fstab = NULL;

services/init/standard/init_mount.h

@@ -23,7 +23,6 @@
 extern "C" {
 #endif
 #endif
-#define PARTITION_NAME_SIZE 32
 Fstab* LoadRequiredFstab(void);
 int MountRequriedPartitions(const Fstab *fstab);
 #ifdef __cplusplus

services/param/manager/param_server.c

@@ -120,6 +120,8 @@ INIT_LOCAL_API int LoadParamFromCmdLine(void)
         },
         {OHOS_BOOT"reboot_reason", CommonDealFun
         },
+        {OHOS_BOOT"bootslots", CommonDealFun
+        },
         {OHOS_BOOT"sn", SnDealFun
         }
     };

ueventd/ueventd.c

@@ -182,7 +182,8 @@ static void HandleRequiredBlockDeviceNodes(const struct Uevent *uevent, char **d
             INIT_LOGI("%s match with required partition %s success, now handle it", uevent->syspath, deviceName);
             HandleBlockDeviceEvent(uevent);
             return;
-        } else if (strstr(devices[i], uevent->partitionName) != NULL) {
+        } else if (strstr(devices[i], uevent->partitionName) != NULL ||
+            strstr(uevent->partitionName, "vendor") != NULL || strstr(uevent->partitionName, "system") != NULL) {
             INIT_LOGI("Handle required partitionName %s", uevent->partitionName);
             HandleBlockDeviceEvent(uevent);
             return;