Replace the OpenFileByDevicePath() function with EfiOpenFileByDevicePath()
from UefiLib, correcting the following issues:
- imprecise comments on OpenFileByDevicePath(),
- code duplication between this module and other modules,
- local variable name "EfiSimpleFileSystemProtocol" starting with "Efi"
prefix,
- bogus "FileHandle = NULL" assignments,
- leaking "Handle1" when the device path type/subtype check or the
realignment-motivated AllocateCopyPool() fails in the loop,
- stale SHELL_FILE_HANDLE reference in a comment.
Cc: Chao Zhang <chao.b.zhang@intel.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Roman Bacik <roman.bacik@broadcom.com>
Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=1008
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Chao Zhang <chao.b.zhang@intel.com>
Reviewed-by: Jaben Carsey <jaben.carsey@intel.com>
---
Notes:
v2:
- pick up Chao's and Jaben's R-b's
- insert a space character between "EfiOpenFileByDevicePath" and "(" --
it was missing from the pre-patch code too
SecurityPkg/VariableAuthenticated/SecureBootConfigDxe/SecureBootConfigDxe.inf | 1 -
SecurityPkg/VariableAuthenticated/SecureBootConfigDxe/SecureBootConfigFileExplorer.c | 151 +-------------------
2 files changed, 1 insertion(+), 151 deletions(-)
diff --git a/SecurityPkg/VariableAuthenticated/SecureBootConfigDxe/SecureBootConfigDxe.inf b/SecurityPkg/VariableAuthenticated/SecureBootConfigDxe/SecureBootConfigDxe.inf
index 487fc8cda917..caf95ddac7d9 100644
--- a/SecurityPkg/VariableAuthenticated/SecureBootConfigDxe/SecureBootConfigDxe.inf
+++ b/SecurityPkg/VariableAuthenticated/SecureBootConfigDxe/SecureBootConfigDxe.inf
@@ -114,7 +114,6 @@ [Guids]
[Protocols]
gEfiHiiConfigAccessProtocolGuid ## PRODUCES
gEfiDevicePathProtocolGuid ## PRODUCES
- gEfiSimpleFileSystemProtocolGuid ## SOMETIMES_CONSUMES
gEfiBlockIoProtocolGuid ## SOMETIMES_CONSUMES
[Depex]
diff --git a/SecurityPkg/VariableAuthenticated/SecureBootConfigDxe/SecureBootConfigFileExplorer.c b/SecurityPkg/VariableAuthenticated/SecureBootConfigDxe/SecureBootConfigFileExplorer.c
index 2a26c20f394c..aef85c470143 100644
--- a/SecurityPkg/VariableAuthenticated/SecureBootConfigDxe/SecureBootConfigFileExplorer.c
+++ b/SecurityPkg/VariableAuthenticated/SecureBootConfigDxe/SecureBootConfigFileExplorer.c
@@ -80,155 +80,6 @@ CleanUpPage (
);
}
-/**
- This function will open a file or directory referenced by DevicePath.
-
- This function opens a file with the open mode according to the file path. The
- Attributes is valid only for EFI_FILE_MODE_CREATE.
-
- @param[in, out] FilePath On input, the device path to the file.
- On output, the remaining device path.
- @param[out] FileHandle Pointer to the file handle.
- @param[in] OpenMode The mode to open the file with.
- @param[in] Attributes The file's file attributes.
-
- @retval EFI_SUCCESS The information was set.
- @retval EFI_INVALID_PARAMETER One of the parameters has an invalid value.
- @retval EFI_UNSUPPORTED Could not open the file path.
- @retval EFI_NOT_FOUND The specified file could not be found on the
- device or the file system could not be found on
- the device.
- @retval EFI_NO_MEDIA The device has no medium.
- @retval EFI_MEDIA_CHANGED The device has a different medium in it or the
- medium is no longer supported.
- @retval EFI_DEVICE_ERROR The device reported an error.
- @retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.
- @retval EFI_WRITE_PROTECTED The file or medium is write protected.
- @retval EFI_ACCESS_DENIED The file was opened read only.
- @retval EFI_OUT_OF_RESOURCES Not enough resources were available to open the
- file.
- @retval EFI_VOLUME_FULL The volume is full.
-**/
-EFI_STATUS
-EFIAPI
-OpenFileByDevicePath(
- IN OUT EFI_DEVICE_PATH_PROTOCOL **FilePath,
- OUT EFI_FILE_HANDLE *FileHandle,
- IN UINT64 OpenMode,
- IN UINT64 Attributes
- )
-{
- EFI_STATUS Status;
- EFI_SIMPLE_FILE_SYSTEM_PROTOCOL *EfiSimpleFileSystemProtocol;
- EFI_FILE_PROTOCOL *Handle1;
- EFI_FILE_PROTOCOL *Handle2;
- EFI_HANDLE DeviceHandle;
- CHAR16 *PathName;
- UINTN PathLength;
-
- if ((FilePath == NULL || FileHandle == NULL)) {
- return EFI_INVALID_PARAMETER;
- }
-
- Status = gBS->LocateDevicePath (
- &gEfiSimpleFileSystemProtocolGuid,
- FilePath,
- &DeviceHandle
- );
- if (EFI_ERROR (Status)) {
- return Status;
- }
-
- Status = gBS->OpenProtocol(
- DeviceHandle,
- &gEfiSimpleFileSystemProtocolGuid,
- (VOID**)&EfiSimpleFileSystemProtocol,
- gImageHandle,
- NULL,
- EFI_OPEN_PROTOCOL_GET_PROTOCOL
- );
- if (EFI_ERROR (Status)) {
- return Status;
- }
-
- Status = EfiSimpleFileSystemProtocol->OpenVolume(EfiSimpleFileSystemProtocol, &Handle1);
- if (EFI_ERROR (Status)) {
- FileHandle = NULL;
- return Status;
- }
-
- //
- // go down directories one node at a time.
- //
- while (!IsDevicePathEnd (*FilePath)) {
- //
- // For file system access each node should be a file path component
- //
- if (DevicePathType (*FilePath) != MEDIA_DEVICE_PATH ||
- DevicePathSubType (*FilePath) != MEDIA_FILEPATH_DP
- ) {
- FileHandle = NULL;
- return (EFI_INVALID_PARAMETER);
- }
- //
- // Open this file path node
- //
- Handle2 = Handle1;
- Handle1 = NULL;
- PathLength = DevicePathNodeLength (*FilePath) - sizeof (EFI_DEVICE_PATH_PROTOCOL);
- PathName = AllocateCopyPool (PathLength, ((FILEPATH_DEVICE_PATH*)*FilePath)->PathName);
- if (PathName == NULL) {
- return EFI_OUT_OF_RESOURCES;
- }
-
- //
- // Try to test opening an existing file
- //
- Status = Handle2->Open (
- Handle2,
- &Handle1,
- PathName,
- OpenMode &~EFI_FILE_MODE_CREATE,
- 0
- );
-
- //
- // see if the error was that it needs to be created
- //
- if ((EFI_ERROR (Status)) && (OpenMode != (OpenMode &~EFI_FILE_MODE_CREATE))) {
- Status = Handle2->Open (
- Handle2,
- &Handle1,
- PathName,
- OpenMode,
- Attributes
- );
- }
- //
- // Close the last node
- //
- Handle2->Close (Handle2);
-
- FreePool (PathName);
-
- if (EFI_ERROR(Status)) {
- return (Status);
- }
-
- //
- // Get the next node
- //
- *FilePath = NextDevicePathNode (*FilePath);
- }
-
- //
- // This is a weak spot since if the undefined SHELL_FILE_HANDLE format changes this must change also!
- //
- *FileHandle = (VOID*)Handle1;
- return EFI_SUCCESS;
-}
-
-
/**
Extract filename from device path. The returned buffer is allocated using AllocateCopyPool.
The caller is responsible for freeing the allocated buffer using FreePool(). If return NULL
@@ -312,7 +163,7 @@ UpdatePage(
gSecureBootPrivateData->FileContext->FileName = FileName;
- OpenFileByDevicePath(
+ EfiOpenFileByDevicePath (
&FilePath,
&gSecureBootPrivateData->FileContext->FHandle,
EFI_FILE_MODE_READ,
--
2.14.1.3.gb7cf6e02401b
_______________________________________________
edk2-devel mailing list
edk2-devel@lists.01.org
https://lists.01.org/mailman/listinfo/edk2-devel
Reviewed-by : Chao Zhang <chao.b.zhang@intel.com>
-----Original Message-----
From: Laszlo Ersek [mailto:lersek@redhat.com]
Sent: Friday, August 3, 2018 8:16 PM
To: edk2-devel-01 <edk2-devel@lists.01.org>
Cc: Zhang, Chao B <chao.b.zhang@intel.com>; Yao, Jiewen <jiewen.yao@intel.com>; Roman Bacik <roman.bacik@broadcom.com>
Subject: [PATCH v2 5/7] SecurityPkg/SecureBootConfigDxe: replace OpenFileByDevicePath() with UefiLib API
Replace the OpenFileByDevicePath() function with EfiOpenFileByDevicePath() from UefiLib, correcting the following issues:
- imprecise comments on OpenFileByDevicePath(),
- code duplication between this module and other modules,
- local variable name "EfiSimpleFileSystemProtocol" starting with "Efi"
prefix,
- bogus "FileHandle = NULL" assignments,
- leaking "Handle1" when the device path type/subtype check or the
realignment-motivated AllocateCopyPool() fails in the loop,
- stale SHELL_FILE_HANDLE reference in a comment.
Cc: Chao Zhang <chao.b.zhang@intel.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Roman Bacik <roman.bacik@broadcom.com>
Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=1008
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Chao Zhang <chao.b.zhang@intel.com>
Reviewed-by: Jaben Carsey <jaben.carsey@intel.com>
---
Notes:
v2:
- pick up Chao's and Jaben's R-b's
- insert a space character between "EfiOpenFileByDevicePath" and "(" --
it was missing from the pre-patch code too
SecurityPkg/VariableAuthenticated/SecureBootConfigDxe/SecureBootConfigDxe.inf | 1 -
SecurityPkg/VariableAuthenticated/SecureBootConfigDxe/SecureBootConfigFileExplorer.c | 151 +-------------------
2 files changed, 1 insertion(+), 151 deletions(-)
diff --git a/SecurityPkg/VariableAuthenticated/SecureBootConfigDxe/SecureBootConfigDxe.inf b/SecurityPkg/VariableAuthenticated/SecureBootConfigDxe/SecureBootConfigDxe.inf
index 487fc8cda917..caf95ddac7d9 100644
--- a/SecurityPkg/VariableAuthenticated/SecureBootConfigDxe/SecureBootConfigDxe.inf
+++ b/SecurityPkg/VariableAuthenticated/SecureBootConfigDxe/SecureBootCo
+++ nfigDxe.inf
@@ -114,7 +114,6 @@ [Guids]
[Protocols]
gEfiHiiConfigAccessProtocolGuid ## PRODUCES
gEfiDevicePathProtocolGuid ## PRODUCES
- gEfiSimpleFileSystemProtocolGuid ## SOMETIMES_CONSUMES
gEfiBlockIoProtocolGuid ## SOMETIMES_CONSUMES
[Depex]
diff --git a/SecurityPkg/VariableAuthenticated/SecureBootConfigDxe/SecureBootConfigFileExplorer.c b/SecurityPkg/VariableAuthenticated/SecureBootConfigDxe/SecureBootConfigFileExplorer.c
index 2a26c20f394c..aef85c470143 100644
--- a/SecurityPkg/VariableAuthenticated/SecureBootConfigDxe/SecureBootConfigFileExplorer.c
+++ b/SecurityPkg/VariableAuthenticated/SecureBootConfigDxe/SecureBootCo
+++ nfigFileExplorer.c
@@ -80,155 +80,6 @@ CleanUpPage (
);
}
-/**
- This function will open a file or directory referenced by DevicePath.
-
- This function opens a file with the open mode according to the file path. The
- Attributes is valid only for EFI_FILE_MODE_CREATE.
-
- @param[in, out] FilePath On input, the device path to the file.
- On output, the remaining device path.
- @param[out] FileHandle Pointer to the file handle.
- @param[in] OpenMode The mode to open the file with.
- @param[in] Attributes The file's file attributes.
-
- @retval EFI_SUCCESS The information was set.
- @retval EFI_INVALID_PARAMETER One of the parameters has an invalid value.
- @retval EFI_UNSUPPORTED Could not open the file path.
- @retval EFI_NOT_FOUND The specified file could not be found on the
- device or the file system could not be found on
- the device.
- @retval EFI_NO_MEDIA The device has no medium.
- @retval EFI_MEDIA_CHANGED The device has a different medium in it or the
- medium is no longer supported.
- @retval EFI_DEVICE_ERROR The device reported an error.
- @retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.
- @retval EFI_WRITE_PROTECTED The file or medium is write protected.
- @retval EFI_ACCESS_DENIED The file was opened read only.
- @retval EFI_OUT_OF_RESOURCES Not enough resources were available to open the
- file.
- @retval EFI_VOLUME_FULL The volume is full.
-**/
-EFI_STATUS
-EFIAPI
-OpenFileByDevicePath(
- IN OUT EFI_DEVICE_PATH_PROTOCOL **FilePath,
- OUT EFI_FILE_HANDLE *FileHandle,
- IN UINT64 OpenMode,
- IN UINT64 Attributes
- )
-{
- EFI_STATUS Status;
- EFI_SIMPLE_FILE_SYSTEM_PROTOCOL *EfiSimpleFileSystemProtocol;
- EFI_FILE_PROTOCOL *Handle1;
- EFI_FILE_PROTOCOL *Handle2;
- EFI_HANDLE DeviceHandle;
- CHAR16 *PathName;
- UINTN PathLength;
-
- if ((FilePath == NULL || FileHandle == NULL)) {
- return EFI_INVALID_PARAMETER;
- }
-
- Status = gBS->LocateDevicePath (
- &gEfiSimpleFileSystemProtocolGuid,
- FilePath,
- &DeviceHandle
- );
- if (EFI_ERROR (Status)) {
- return Status;
- }
-
- Status = gBS->OpenProtocol(
- DeviceHandle,
- &gEfiSimpleFileSystemProtocolGuid,
- (VOID**)&EfiSimpleFileSystemProtocol,
- gImageHandle,
- NULL,
- EFI_OPEN_PROTOCOL_GET_PROTOCOL
- );
- if (EFI_ERROR (Status)) {
- return Status;
- }
-
- Status = EfiSimpleFileSystemProtocol->OpenVolume(EfiSimpleFileSystemProtocol, &Handle1);
- if (EFI_ERROR (Status)) {
- FileHandle = NULL;
- return Status;
- }
-
- //
- // go down directories one node at a time.
- //
- while (!IsDevicePathEnd (*FilePath)) {
- //
- // For file system access each node should be a file path component
- //
- if (DevicePathType (*FilePath) != MEDIA_DEVICE_PATH ||
- DevicePathSubType (*FilePath) != MEDIA_FILEPATH_DP
- ) {
- FileHandle = NULL;
- return (EFI_INVALID_PARAMETER);
- }
- //
- // Open this file path node
- //
- Handle2 = Handle1;
- Handle1 = NULL;
- PathLength = DevicePathNodeLength (*FilePath) - sizeof (EFI_DEVICE_PATH_PROTOCOL);
- PathName = AllocateCopyPool (PathLength, ((FILEPATH_DEVICE_PATH*)*FilePath)->PathName);
- if (PathName == NULL) {
- return EFI_OUT_OF_RESOURCES;
- }
-
- //
- // Try to test opening an existing file
- //
- Status = Handle2->Open (
- Handle2,
- &Handle1,
- PathName,
- OpenMode &~EFI_FILE_MODE_CREATE,
- 0
- );
-
- //
- // see if the error was that it needs to be created
- //
- if ((EFI_ERROR (Status)) && (OpenMode != (OpenMode &~EFI_FILE_MODE_CREATE))) {
- Status = Handle2->Open (
- Handle2,
- &Handle1,
- PathName,
- OpenMode,
- Attributes
- );
- }
- //
- // Close the last node
- //
- Handle2->Close (Handle2);
-
- FreePool (PathName);
-
- if (EFI_ERROR(Status)) {
- return (Status);
- }
-
- //
- // Get the next node
- //
- *FilePath = NextDevicePathNode (*FilePath);
- }
-
- //
- // This is a weak spot since if the undefined SHELL_FILE_HANDLE format changes this must change also!
- //
- *FileHandle = (VOID*)Handle1;
- return EFI_SUCCESS;
-}
-
-
/**
Extract filename from device path. The returned buffer is allocated using AllocateCopyPool.
The caller is responsible for freeing the allocated buffer using FreePool(). If return NULL @@ -312,7 +163,7 @@ UpdatePage(
gSecureBootPrivateData->FileContext->FileName = FileName;
- OpenFileByDevicePath(
+ EfiOpenFileByDevicePath (
&FilePath,
&gSecureBootPrivateData->FileContext->FHandle,
EFI_FILE_MODE_READ,
--
2.14.1.3.gb7cf6e02401b
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