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Add support for dm-integrity superblock V2.

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Only support parsing superblock data,
new functions will be supported in later kernel and releases.
This commit is contained in:
Milan Broz
2018-06-17 20:13:23 +02:00
parent a60543728b
commit ac26921569
2 changed files with 16 additions and 2 deletions
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8
lib/integrity/integrity.h
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@@ -30,7 +30,11 @@ struct volume_key;
/* dm-integrity helper */
#define SB_MAGIC "integrt"
#define SB_VERSION 1
#define SB_VERSION_1 1
#define SB_VERSION_2 2
#define SB_FLAG_HAVE_JOURNAL_MAC (1 << 0)
#define SB_FLAG_RECALCULATING (1 << 1) /* V2 only */
struct superblock {
uint8_t magic[8];
@@ -41,6 +45,8 @@ struct superblock {
uint64_t provided_data_sectors;
uint32_t flags;
uint8_t log2_sectors_per_block;
uint8_t pad[3];
uint64_t recalc_sector; /* V2 only */
} __attribute__ ((packed));
int INTEGRITY_read_sb(struct crypt_device *cd, struct crypt_params_integrity *params);