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Add support for allow_discrads for dm-integrity.

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Kernel 5.7 adds support for optional discard/TRIM operation
for dm-integrity (available only for internal hash, not for LUKS2
with integrity).

This patch adds support for the new option.
This commit is contained in:
Milan Broz
2020-04-09 00:03:42 +02:00
parent c9f6ccff9f
commit 790666ffb0
5 changed files with 42 additions and 1 deletions
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lib/utils_dm.h
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@@ -68,6 +68,7 @@ static inline uint32_t act2dmflags(uint32_t act_flags)
#define DM_BITLK_EBOIV_SUPPORTED (1 << 20) /* EBOIV for BITLK supported */
#define DM_BITLK_ELEPHANT_SUPPORTED (1 << 21) /* Elephant diffuser for BITLK supported */
#define DM_VERITY_SIGNATURE_SUPPORTED (1 << 22) /* Verity option root_hash_sig_key_desc supported */
#define DM_INTEGRITY_DISCARDS_SUPPORTED (1 << 23) /* dm-integrity discards/TRIM option is supported */
typedef enum { DM_CRYPT = 0, DM_VERITY, DM_INTEGRITY, DM_LINEAR, DM_ERROR, DM_ZERO, DM_UNKNOWN } dm_target_type;
enum tdirection { TARGET_SET = 1, TARGET_QUERY };