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author | Kevin Chavez <kechavez@google.com> | 2016-08-05 15:39:54 -0400 |
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committer | Kevin Chavez <kechavez@google.com> | 2016-08-05 15:39:54 -0400 |
commit | d77132927e03072d9a48b000102dd329669b2d17 (patch) | |
tree | 3f904bb01aa95c1db2ed0506fdc5304d85afb315 | |
parent | 18ad887beaf6c13d5444150c54f1decabcc5c9c2 (diff) | |
download | brillo-d77132927e03072d9a48b000102dd329669b2d17.tar.gz |
Fix Android build breakage caused by uefi boot loader missing bub_ops.h.
Change-Id: Idb8967588020d7c04578d6c8f0dbd30c2cb6bcdd
-rw-r--r-- | brillo_uefi_x86_64/boot_loader/bub_ops.h | 152 |
1 files changed, 152 insertions, 0 deletions
diff --git a/brillo_uefi_x86_64/boot_loader/bub_ops.h b/brillo_uefi_x86_64/boot_loader/bub_ops.h new file mode 100644 index 0000000..f466459 --- /dev/null +++ b/brillo_uefi_x86_64/boot_loader/bub_ops.h @@ -0,0 +1,152 @@ +/* + * Copyright (C) 2016 The Android Open Source Project + * + * 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. + */ + +// NOTE: See avb_sysdeps.h + +#ifndef BUB_OPS_H_ +#define BUB_OPS_H_ + +#include "bub_sysdeps.h" + +#ifdef __cplusplus +extern "C" { +#endif + +/* Return codes used for I/O operations. + * + * BUB_IO_RESULT_OK is returned if the requested operation was + * successful. + * + * BUB_IO_RESULT_ERROR_NO_SUCH_PARTITION is returned if the requested + * partition does not exist. + * + * BUB_IO_RESULT_ERROR_RANGE_OUTSIDE_PARTITION is returned if the + * range of bytes requested to be read or written is outside the range + * of the partition. + * + * BUB_IO_RESULT_ERROR_IO is returned if the underlying disk + * encountered an I/O error. + */ +typedef enum { + BUB_IO_RESULT_OK, + BUB_IO_RESULT_ERROR_NO_SUCH_PARTITION, + BUB_IO_RESULT_ERROR_RANGE_OUTSIDE_PARTITION, + BUB_IO_RESULT_ERROR_IO, +} BubIOResult; + +struct BubOps; +typedef struct BubOps BubOps; + +/* High-level operations/functions/methods that are platform + * dependent. + */ +struct BubOps { + /* Reads |num_bytes| from offset |offset| from partition with name + * |partition| (NUL-terminated UTF-8 string). If |offset| is + * negative, its absolute value should be interpreted as the number + * of bytes from the end of the partition. + * + * This function returns BUB_IO_RESULT_ERROR_NO_SUCH_PARTITION if + * there is no partition with the given name, + * BUB_IO_RESULT_ERROR_RANGE_OUTSIDE_PARTITION if the requested + * |offset| is outside the partition, and BUB_IO_RESULT_ERROR_IO if + * there was an I/O error from the underlying I/O subsystem. If the + * operation succeeds as requested BUB_IO_RESULT_OK is returned and + * the data is available in |buf|. + * + * The only time partial I/O may occur is if reading beyond the end + * of the partition. In this case the value returned in + * |out_num_read| may be smaller than |num_bytes|. + */ + BubIOResult (*read_from_partition)(BubOps* ops, const char* partition, + void* buf, int64_t offset, + size_t num_bytes, size_t* out_num_read); + + /* Writes |num_bytes| at offset |offset| from partition with name + * |partition| (NUL-terminated UTF-8 string). If |offset| is + * negative, its absolute value should be interpreted as the number + * of bytes from the end of the partition. + * + * This function returns BUB_IO_RESULT_ERROR_NO_SUCH_PARTITION if + * there is no partition with the given name, + * BUB_IO_RESULT_ERROR_RANGE_OUTSIDE_PARTITION if the requested + * byterange goes outside the partition, and BUB_IO_RESULT_ERROR_IO + * if there was an I/O error from the underlying I/O subsystem. If + * the operation succeeds as requested BUB_IO_RESULT_OK is + * returned. + * + * This function never does any partial I/O, it either transfers all + * of the requested bytes or returns an error. + */ + BubIOResult (*write_to_partition)(BubOps* ops, const char* partition, + const void* buf, int64_t offset, + size_t num_bytes); + + /* Checks if the given public key is trusted. Return non-zero if + * trusted or zero if untrusted. + */ + int (*validate_public_key)(BubOps* ops, const uint8_t* public_key_data, + size_t public_key_length); + + /* Gets the rollback index corresponding to the slot given by + * |rollback_index_slot|. The value is returned in + * |out_rollback_index|. Returns non-zero if the rollback index was + * retrieved, zero on error. + * + * A device may have a limited amount of rollback index slots (say, + * one or four) so may error out if |rollback_index_slot| exceeds + * this number. + */ + int (*read_rollback_index)(BubOps* ops, size_t rollback_index_slot, + uint64_t* out_rollback_index); + + /* Sets the rollback index corresponding to the slot given by + * |rollback_index_slot| to |rollback_index|. Returns non-zero if + * the rollback index was set, zero on error. + * + * A device may have a limited amount of rollback index slots (say, + * one or four) so may error out if |rollback_index_slot| exceeds + * this number. + */ + int (*write_rollback_index)(BubOps* ops, size_t rollback_index_slot, + uint64_t rollback_index); + + /* Gets whether the device is unlocked. The value is returned in + * |out_is_unlocked| (non-zero if unlocked, zero otherwise). Returns + * non-zero if the state was retrieved, zero on error. + */ + int (*read_is_unlocked)(BubOps* ops, int* out_is_unlocked); + + /* Gets the unique partition GUID for a partition with name in + * |partition| (NUL-terminated UTF-8 string). The GUID is copied as + * a string into |guid_buf| of size |guid_buf_size| and will be NUL + * terminated. The string must be lower-case and properly + * hyphenated. For example: + * + * 527c1c6d-6361-4593-8842-3c78fcd39219 + * + * Returns zero if the operation fails (no such partition or + * |buf_size| is too small), non-zero if it succeeds. + */ + int (*get_unique_guid_for_partition)(BubOps* ops, const char* partition, + char* guid_buf, size_t guid_buf_size); +}; + +#ifdef __cplusplus +} +#endif + +#endif /* BUB_OPS_H_ */
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