diff options
| author | Heinrich Schuchardt <xypron.glpk@gmx.de> | 2018-10-07 05:26:26 +0200 |
|---|---|---|
| committer | Alexander Graf <agraf@suse.de> | 2018-10-16 15:47:05 +0200 |
| commit | 0801d4d2fbceb04b4f1983fdd7c2dd5ae728fd74 (patch) | |
| tree | e9654cd7f843b92ec43762d7491f7451a4a7f86c /lib/efi_loader/efi_file.c | |
| parent | 3ce7829792c50d1e5add3d8ef88883e8298aa4eb (diff) | |
efi_loader: correct signature of GetPosition, SetPosition
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: b6dd57773719 ("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>
Diffstat (limited to 'lib/efi_loader/efi_file.c')
| -rw-r--r-- | lib/efi_loader/efi_file.c | 39 |
1 files changed, 31 insertions, 8 deletions
diff --git a/lib/efi_loader/efi_file.c b/lib/efi_loader/efi_file.c index 0753a36a20..c1e285e9f7 100644 --- a/lib/efi_loader/efi_file.c +++ b/lib/efi_loader/efi_file.c @@ -436,28 +436,51 @@ 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, - efi_uintn_t *pos) + u64 *pos) { + efi_status_t ret = EFI_SUCCESS; struct file_handle *fh = to_fh(file); EFI_ENTRY("%p, %p", file, pos); - if (fh->offset <= SIZE_MAX) { - *pos = fh->offset; - return EFI_EXIT(EFI_SUCCESS); - } else { - return EFI_EXIT(EFI_DEVICE_ERROR); + if (fh->isdir) { + ret = EFI_UNSUPPORTED; + goto out; } + + *pos = fh->offset; +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, - efi_uintn_t pos) + u64 pos) { struct file_handle *fh = to_fh(file); efi_status_t ret = EFI_SUCCESS; - EFI_ENTRY("%p, %zu", file, pos); + EFI_ENTRY("%p, %llu", file, pos); if (fh->isdir) { if (pos != 0) { |