A following patch introduces a different logic for loading initrd's
based on the EFI_LOAD_FILE2_PROTOCOL.
Since similar logic can be applied in the future for other system files
(i.e DTBs), let's add some helper functions which will retrieve and
parse file paths stored in EFI variables.
Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
When copying a string with must allocate a byte for the terminating '\0' in
the target buffer.
Fixes: fbe4c7df00 ("efi_loader: enable file SetInfo()")
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
When reading a directory, EFI_BUFFER_TOO_SMALL should be returned when
the supplied buffer is too small, so a use-case is to call
efi_file_read with *buffer_size=0 and buffer=NULL to obtain the needed
size before doing the actual read.
So move the buffer!=NULL check to after the buffer size has been checked.
This fix allows the Redhat shim fallback to run and e.g. Fedora 32 now
boots out of the box.
Signed-off-by: Stefan Sørensen <stefan.sorensen@spectralink.com>
Reviewed-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
We should not be using typedefs and these make it harder to use
forward declarations (to reduce header file inclusions). Drop the typedef.
Signed-off-by: Simon Glass <sjg@chromium.org>
When the GetInfo() method of the EFI_FILE_PROTOCOL is called to retrieve
the file system info we claim that the volume is read only and has no free
space. This leads to failures in programs that check this information
before writing to the volume like SCT's InstallSct.efi.
Currently there is no function to determine these parameters in U-Boot. So
let's return optimistic values:
Return that the volume is writable.
Return the volume size as free space.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
We do not support volume label changes. No parameter checks are needed
here.
When the info for as file is changed the buffer must always contain a file
name.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Check the parameters of EFI_FILE_PROTOCOL.GetInfo() to avoid possible NULL
dereference.
Check the buffer size for EFI_FILE_SYSTEM_INFO.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
We cannot determine the volume name in U-Boot. Instead of providing a dummy
volume name in case of EFI_FILE_SYSTEM_INFO and EFI_UNSUPPORTED in case of
EFI_FILE_SYSTEM_VOLUME_LABEL consistently return an empty string.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
The UEFI specification requires to implement version 2 of the
EFI_FILE_PROTOCOL. Provide the missing functions as stubs.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
The file size has to be determined in multiple places. Factor out a common
function.
If on entry into EFI_FILE_PROTOCOL.Read() the current position is beyond
the end of the file, return EFI_DEVICE_ERROR.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
EFI_FILE_PROTOCOL.Read() is used both to read files and directories.
When reaching the end of a directory we always have to return buffer size
zero irrespective of the incoming buffer size. (The described scenario for
a Shim quirk cannot arise because every directory has at least '.' and '..'
as entries.)
Even when the buffer_size is too small multiple times we have to keep a
reference to our last read directory entry.
When we return to the start of the directory via SetPosition() we must
remove the reference to a previously kept directory entry.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
ascii2unicode() can only convert characters 0x00-0x7f from UTF-8 to UTF-16.
Use utf8_utf16_strcpy() instead.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Check the parameters passed to Write():
* cannot write to directories (UEFI SCT 2017, 5.7.3.5.15)
* cannot write to file opened read only (UEFI SCT 2017, 5.7.3.5.16)
Add missing comments.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
The device path structure is packed. So no assumption on the alignment is
possible. Copy the file name in efi_file_from_path() to assure there is no
unaligned access.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
If EFI_FILE_PROTOCOL.Delete() fails, always close the handle and return
EFI_WARN_DELETE_FAILURE.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
EFI shell command edit uses the SetInfo() methods to unset the read only
attribute of the file to be edited. So let efi_file_setinfo() return
success in this case.
Return an error if the function is called for to rename or resize a file
as we do not support this yet.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
The EFI shell expects that after opening a file with EFI_FILE_MODE_CREATE
GetInfo() succeeds. Up to now we do not actually create the file when
method Open() of the EFI_FILE_PROTOCOL is called.
If method Open() of the EFI_FILE_PROTOCOL is called with
EFI_FILE_MODE_CREATE and the file does not yet exist, call fs_write() with
a buffer size of zero to actually create the file.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
For debugging it is helpful to know the address of the file handle created
by the Open() method of the EFI file protocol. So let's write it with
EFI_PRINT().
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
We currently only support EFI_FILE_PROTOCOL_REVISION while
UEFI specs 2.4 - 2.7 prescribe EFI_FILE_PROTOCOL_REVISION2.
Add a todo.
Add missing constants for the EFI file protocol revision.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
printf("%ls", ..) expects u16 * as argument to print. There is not need for
a conversion to wchar_t *.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
We check the existence of files with fs_exist(). This function calls
fs_close(). If we do not set the active block device again fs_opendir()
fails and we do not set the flag EFI_FILE_DIRECTORY. Due to this error the
`cd` command in the EFI shell fails.
So let's add the missing set_blk_dev(fh) call.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Alexander Graf <agraf@suse.de>
UTF-16 strings in our code should all be u16 *. Fix an inconsistency for
file names which may lead to a warning for printf("%ls", ).
Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Alexander Graf <agraf@suse.de>
The printf() string here is not actually correct. Add a cast to avoid
a warning when checking is enabled.
Signed-off-by: Simon Glass <sjg@chromium.org>
We should be consistent in the types that we use to store Unicode strings.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Alexander Graf <agraf@suse.de>
When is_dir() is called we have already execute set_blk_dev(fh).
So don't call it again.
This fixes CoverityScan CID 184093.
Reported-by: Tom Rini <trini@konsulko.com>
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Alexander Graf <agraf@suse.de>
The UEFI spec requires that file positions are passed as u64 in
GetPosition() and SetPosition().
Check if the file handle points to a directory in GetPosition().
Provide a unit test for GetPosition() and SetPosition().
Fix Coverity warning CID 184079 (CONSTANT_EXPRESSION_RESULT).
Add comments.
Fixes: b6dd577737 ("efi_loader: use correct types in EFI_FILE_PROTOCOL")
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Alexander Graf <agraf@suse.de>
We should not check parameter file twice.
We should check parameter new_handle.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Alexander Graf <agraf@suse.de>
efi_file_getinfo() is called with a GUID. In EFI_ENTRY use %pUl as
format type. This way the GUID is printed in debug mode.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Alexander Graf <agraf@suse.de>
We should not directly cast between pointers and addresses since it breaks
sandbox. Fix this and simplify the code in file_read().
Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Alexander Graf <agraf@suse.de>
The UEFI spec requires that attributes are only set for when
EFI_FILE_MODE_CREATE is set in open_mode.
The SCT tries to read a directory with EFI_FILE_DIRECTORY.
As EDK2 allows this we should not be more strict.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Alexander Graf <agraf@suse.de>
'Delete' will be implemented here by calling fs_unlink() which relies on
underlying file system's implementation.
Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
Signed-off-by: Alexander Graf <agraf@suse.de>
In efi world, there is no obvious "mkdir" interface, instead, Open()
with EFI_FILE_MODE_CREATE in mode parameter and EFI_FILE_DIRECTORY
in attributes parameter creates a directory.
In this patch, efi_file_open() is extended so as to accept such
a combination of parameters and call u-boot's mkdir interface for
expected action.
Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
Signed-off-by: Alexander Graf <agraf@suse.de>
The function names utf16_strlen() and utf16_strnlen() are misnomers.
The functions do not count utf-16 characters but non-zero words.
So let's rename them to u16_strlen and u16_strnlen().
In utf16_dup() avoid assignment in if clause.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Alexander Graf <agraf@suse.de>
The fs_read() function wants to get an address rather than the
pointer to a buffer.
So let's convert the passed buffer from pointer back a the address
to make efi_loader on sandbox happier.
Signed-off-by: Alexander Graf <agraf@suse.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Alexander Graf <agraf@suse.de>
As part of the main conversion a few files were missed. These files had
additional whitespace after the '*' and before the SPDX tag and my
previous regex was too strict. This time I did a grep for all SPDX tags
and then filtered out anything that matched the correct styles.
Fixes: 83d290c56f ("SPDX: Convert all of our single license tags to Linux Kernel style")
Reported-by: Heinrich Schuchardt <xypron.debian@gmx.de>
Signed-off-by: Tom Rini <trini@konsulko.com>
Implement the information type EFI_FILE_SYSTEM_INFO in the service
GetInfo() of the EFI_FILE_PROTOCOL.
The volume label is not available in U-Boot. As a work-around use the
partition name instead.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Alexander Graf <agraf@suse.de>
In the EFI_FILE_PROTOCOL buffer sizes and positions are passed as UINTN and
not as u64.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Alexander Graf <agraf@suse.de>
fallback.efi (and probably other things) use UEFI's simple-file-system
protocol and file support to search for OS's to boot.
Signed-off-by: Rob Clark <robdclark@gmail.com>
[agraf: whitespace fixes, unsigned fixes]
Signed-off-by: Alexander Graf <agraf@suse.de>
