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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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10
lib/integrity/integrity.c
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@@ -42,7 +42,7 @@ static int INTEGRITY_read_superblock(struct crypt_device *cd,
if (read_lseek_blockwise(devfd, device_block_size(device),
device_alignment(device), sb, sizeof(*sb), offset) != sizeof(*sb) ||
memcmp(sb->magic, SB_MAGIC, sizeof(sb->magic)) ||
sb->version != SB_VERSION) {
(sb->version != SB_VERSION_1 && sb->version != SB_VERSION_2)) {
log_std(cd, "No integrity superblock detected on %s.\n",
device_path(device));
r = -EINVAL;
@@ -50,6 +50,8 @@ static int INTEGRITY_read_superblock(struct crypt_device *cd,
sb->integrity_tag_size = le16toh(sb->integrity_tag_size);
sb->journal_sections = le32toh(sb->journal_sections);
sb->provided_data_sectors = le64toh(sb->provided_data_sectors);
sb->recalc_sector = le64toh(sb->recalc_sector);
sb->flags = le32toh(sb->flags);
r = 0;
}
@@ -82,11 +84,17 @@ int INTEGRITY_dump(struct crypt_device *cd, struct device *device, uint64_t offs
return r;
log_std(cd, "Info for integrity device %s.\n", device_path(device));
log_std(cd, "superblock_version %d\n", (unsigned)sb.version);
log_std(cd, "log2_interleave_sectors %d\n", sb.log2_interleave_sectors);
log_std(cd, "integrity_tag_size %u\n", sb.integrity_tag_size);
log_std(cd, "journal_sections %u\n", sb.journal_sections);
log_std(cd, "provided_data_sectors %" PRIu64 "\n", sb.provided_data_sectors);
log_std(cd, "sector_size %u\n", SECTOR_SIZE << sb.log2_sectors_per_block);
if (sb.version == SB_VERSION_2 && (sb.flags & SB_FLAG_RECALCULATING))
log_std(cd, "recalc_sector %" PRIu64 "\n", sb.recalc_sector);
log_std(cd, "flags %s%s\n",
sb.flags & SB_FLAG_HAVE_JOURNAL_MAC ? "have_journal_mac " : "",
sb.flags & SB_FLAG_RECALCULATING ? "recalculating " : "");
return 0;
}