+// SPDX-License-Identifier: GPL-2.0+
/*
* EFI utils
*
* Copyright (c) 2017 Rob Clark
- *
- * SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <charset.h>
#include <efi_loader.h>
#include <malloc.h>
+#include <mapmem.h>
#include <fs.h>
+/* GUID for file system information */
+const efi_guid_t efi_file_system_info_guid = EFI_FILE_SYSTEM_INFO_GUID;
+
struct file_system {
struct efi_simple_file_system_protocol base;
struct efi_device_path *dp;
return fs_set_blk_dev_with_part(fh->fs->desc, fh->fs->part);
}
+/**
+ * is_dir() - check if file handle points to directory
+ *
+ * We assume that set_blk_dev(fh) has been called already.
+ *
+ * @fh: file handle
+ * Return: true if file handle points to a directory
+ */
static int is_dir(struct file_handle *fh)
{
struct fs_dir_stream *dirs;
- set_blk_dev(fh);
dirs = fs_opendir(fh->path);
if (!dirs)
return 0;
return 0;
}
-/* NOTE: despite what you would expect, 'file_name' is actually a path.
- * With windoze style backlashes, ofc.
+/**
+ * file_open() - open a file handle
+ *
+ * @fs: file system
+ * @parent: directory relative to which the file is to be opened
+ * @file_name: path of the file to be opened. '\', '.', or '..' may
+ * be used as modifiers. A leading backslash indicates an
+ * absolute path.
+ * @mode: bit mask indicating the access mode (read, write,
+ * create)
+ * @attributes: attributes for newly created file
+ * Returns: handle to the opened file or NULL
*/
static struct efi_file_handle *file_open(struct file_system *fs,
- struct file_handle *parent, s16 *file_name, u64 mode)
+ struct file_handle *parent, s16 *file_name, u64 mode,
+ u64 attributes)
{
struct file_handle *fh;
char f0[MAX_UTF8_PER_UTF16] = {0};
if (file_name) {
utf16_to_utf8((u8 *)f0, (u16 *)file_name, 1);
- flen = utf16_strlen((u16 *)file_name);
+ flen = u16_strlen((u16 *)file_name);
}
/* we could have a parent, but also an absolute path: */
if (set_blk_dev(fh))
goto error;
- if (!((mode & EFI_FILE_MODE_CREATE) || fs_exists(fh->path)))
+ if ((mode & EFI_FILE_MODE_CREATE) &&
+ (attributes & EFI_FILE_DIRECTORY)) {
+ if (fs_mkdir(fh->path))
+ goto error;
+ } else if (!((mode & EFI_FILE_MODE_CREATE) ||
+ fs_exists(fh->path)))
goto error;
/* figure out if file is a directory: */
s16 *file_name, u64 open_mode, u64 attributes)
{
struct file_handle *fh = to_fh(file);
+ efi_status_t ret;
EFI_ENTRY("%p, %p, \"%ls\", %llx, %llu", file, new_handle, file_name,
open_mode, attributes);
- *new_handle = file_open(fh->fs, fh, file_name, open_mode);
- if (!*new_handle)
- return EFI_EXIT(EFI_NOT_FOUND);
+ /* Check parameters */
+ if (!file || !new_handle || !file_name) {
+ ret = EFI_INVALID_PARAMETER;
+ goto out;
+ }
+ if (open_mode != EFI_FILE_MODE_READ &&
+ open_mode != (EFI_FILE_MODE_READ | EFI_FILE_MODE_WRITE) &&
+ open_mode != (EFI_FILE_MODE_READ | EFI_FILE_MODE_WRITE |
+ EFI_FILE_MODE_CREATE)) {
+ ret = EFI_INVALID_PARAMETER;
+ goto out;
+ }
+ /*
+ * The UEFI spec requires that attributes are only set in create mode.
+ * The SCT does not care about this and sets EFI_FILE_DIRECTORY in
+ * read mode. EDK2 does not check that attributes are zero if not in
+ * create mode.
+ *
+ * So here we only check attributes in create mode and do not check
+ * that they are zero otherwise.
+ */
+ if ((open_mode & EFI_FILE_MODE_CREATE) &&
+ (attributes & (EFI_FILE_READ_ONLY | ~EFI_FILE_VALID_ATTR))) {
+ ret = EFI_INVALID_PARAMETER;
+ goto out;
+ }
- return EFI_EXIT(EFI_SUCCESS);
+ /* Open file */
+ *new_handle = file_open(fh->fs, fh, file_name, open_mode, attributes);
+ if (*new_handle)
+ ret = EFI_SUCCESS;
+ else
+ ret = EFI_NOT_FOUND;
+out:
+ return EFI_EXIT(ret);
}
static efi_status_t file_close(struct file_handle *fh)
static efi_status_t EFIAPI efi_file_delete(struct efi_file_handle *file)
{
struct file_handle *fh = to_fh(file);
+ efi_status_t ret = EFI_SUCCESS;
+
EFI_ENTRY("%p", file);
+
+ if (set_blk_dev(fh)) {
+ ret = EFI_DEVICE_ERROR;
+ goto error;
+ }
+
+ if (fs_unlink(fh->path))
+ ret = EFI_DEVICE_ERROR;
file_close(fh);
- return EFI_EXIT(EFI_WARN_DELETE_FAILURE);
+
+error:
+ return EFI_EXIT(ret);
}
static efi_status_t file_read(struct file_handle *fh, u64 *buffer_size,
{
loff_t actread;
- if (fs_read(fh->path, (ulong)buffer, fh->offset,
+ if (fs_read(fh->path, map_to_sysmem(buffer), fh->offset,
*buffer_size, &actread))
return EFI_DEVICE_ERROR;
}
static efi_status_t EFIAPI efi_file_read(struct efi_file_handle *file,
- u64 *buffer_size, void *buffer)
+ efi_uintn_t *buffer_size, void *buffer)
{
struct file_handle *fh = to_fh(file);
efi_status_t ret = EFI_SUCCESS;
+ u64 bs;
EFI_ENTRY("%p, %p, %p", file, buffer_size, buffer);
+ if (!buffer_size || !buffer) {
+ ret = EFI_INVALID_PARAMETER;
+ goto error;
+ }
+
if (set_blk_dev(fh)) {
ret = EFI_DEVICE_ERROR;
goto error;
}
+ bs = *buffer_size;
if (fh->isdir)
- ret = dir_read(fh, buffer_size, buffer);
+ ret = dir_read(fh, &bs, buffer);
else
- ret = file_read(fh, buffer_size, buffer);
+ ret = file_read(fh, &bs, buffer);
+ if (bs <= SIZE_MAX)
+ *buffer_size = bs;
+ else
+ *buffer_size = SIZE_MAX;
error:
return EFI_EXIT(ret);
}
static efi_status_t EFIAPI efi_file_write(struct efi_file_handle *file,
- u64 *buffer_size, void *buffer)
+ efi_uintn_t *buffer_size,
+ void *buffer)
{
struct file_handle *fh = to_fh(file);
efi_status_t ret = EFI_SUCCESS;
goto error;
}
- if (fs_write(fh->path, (ulong)buffer, fh->offset, *buffer_size,
+ if (fs_write(fh->path, map_to_sysmem(buffer), fh->offset, *buffer_size,
&actwrite)) {
ret = EFI_DEVICE_ERROR;
goto error;
return EFI_EXIT(ret);
}
+/**
+ * efi_file_getpos() - get current position in file
+ *
+ * This function implements the GetPosition service of the EFI file protocol.
+ * See the UEFI spec for details.
+ *
+ * @file: file handle
+ * @pos: pointer to file position
+ * Return: status code
+ */
static efi_status_t EFIAPI efi_file_getpos(struct efi_file_handle *file,
- u64 *pos)
+ u64 *pos)
{
+ efi_status_t ret = EFI_SUCCESS;
struct file_handle *fh = to_fh(file);
+
EFI_ENTRY("%p, %p", file, pos);
+
+ if (fh->isdir) {
+ ret = EFI_UNSUPPORTED;
+ goto out;
+ }
+
*pos = fh->offset;
- return EFI_EXIT(EFI_SUCCESS);
+out:
+ return EFI_EXIT(ret);
}
+/**
+ * efi_file_setpos() - set current position in file
+ *
+ * This function implements the SetPosition service of the EFI file protocol.
+ * See the UEFI spec for details.
+ *
+ * @file: file handle
+ * @pos: new file position
+ * Return: status code
+ */
static efi_status_t EFIAPI efi_file_setpos(struct efi_file_handle *file,
- u64 pos)
+ u64 pos)
{
struct file_handle *fh = to_fh(file);
efi_status_t ret = EFI_SUCCESS;
}
static efi_status_t EFIAPI efi_file_getinfo(struct efi_file_handle *file,
- efi_guid_t *info_type, u64 *buffer_size, void *buffer)
+ const efi_guid_t *info_type,
+ efi_uintn_t *buffer_size,
+ void *buffer)
{
struct file_handle *fh = to_fh(file);
efi_status_t ret = EFI_SUCCESS;
- EFI_ENTRY("%p, %p, %p, %p", file, info_type, buffer_size, buffer);
+ EFI_ENTRY("%p, %pUl, %p, %p", file, info_type, buffer_size, buffer);
if (!guidcmp(info_type, &efi_file_info_guid)) {
struct efi_file_info *info = buffer;
if (fh->isdir)
info->attribute |= EFI_FILE_DIRECTORY;
- ascii2unicode((u16 *)info->file_name, filename);
+ ascii2unicode(info->file_name, filename);
+ } else if (!guidcmp(info_type, &efi_file_system_info_guid)) {
+ struct efi_file_system_info *info = buffer;
+ disk_partition_t part;
+ efi_uintn_t required_size;
+ int r;
+
+ if (fh->fs->part >= 1)
+ r = part_get_info(fh->fs->desc, fh->fs->part, &part);
+ else
+ r = part_get_info_whole_disk(fh->fs->desc, &part);
+ if (r < 0) {
+ ret = EFI_DEVICE_ERROR;
+ goto error;
+ }
+ required_size = sizeof(info) + 2 *
+ (strlen((const char *)part.name) + 1);
+ if (*buffer_size < required_size) {
+ *buffer_size = required_size;
+ ret = EFI_BUFFER_TOO_SMALL;
+ goto error;
+ }
+
+ memset(info, 0, required_size);
+
+ info->size = required_size;
+ info->read_only = true;
+ info->volume_size = part.size * part.blksz;
+ info->free_space = 0;
+ info->block_size = part.blksz;
+ /*
+ * TODO: The volume label is not available in U-Boot.
+ * Use the partition name as substitute.
+ */
+ ascii2unicode((u16 *)info->volume_label,
+ (const char *)part.name);
} else {
ret = EFI_UNSUPPORTED;
}
}
static efi_status_t EFIAPI efi_file_setinfo(struct efi_file_handle *file,
- efi_guid_t *info_type, u64 buffer_size, void *buffer)
+ const efi_guid_t *info_type,
+ efi_uintn_t buffer_size,
+ void *buffer)
{
- EFI_ENTRY("%p, %p, %llu, %p", file, info_type, buffer_size, buffer);
+ EFI_ENTRY("%p, %p, %zu, %p", file, info_type, buffer_size, buffer);
+
return EFI_EXIT(EFI_UNSUPPORTED);
}
EFI_ENTRY("%p, %p", this, root);
- *root = file_open(fs, NULL, NULL, 0);
+ *root = file_open(fs, NULL, NULL, 0, 0);
return EFI_EXIT(EFI_SUCCESS);
}
projects / platform / kernel / u-boot.git / blobdiff