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target/sbc: Make internal DIF emulation honor ->prot_checks

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The internal DIF emulation was not honoring se_cmd->prot_checks for
the WRPROTECT/RDPROTECT == 0x3 case, so sbc_dif_v1_verify() has been
updated to follow which checks have been calculated based on
WRPROTECT/RDPROTECT in sbc_set_prot_op_checks().

Reviewed-by: Martin Petersen <martin.petersen@oracle.com>
Reviewed-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
This commit is contained in:
Nicholas Bellinger 2015-04-14 11:57:43 -07:00
parent cceca4a638
commit d7a463b0ac
1 changed files with 7 additions and 0 deletions
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7
drivers/target/target_core_sbc.c
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@ -1230,6 +1230,9 @@ sbc_dif_v1_verify(struct se_cmd *cmd, struct se_dif_v1_tuple *sdt,
int block_size = dev->dev_attrib.block_size;
__be16 csum;
if (!(cmd->prot_checks & TARGET_DIF_CHECK_GUARD))
goto check_ref;
csum = cpu_to_be16(crc_t10dif(p, block_size));
if (sdt->guard_tag != csum) {
@ -1239,6 +1242,10 @@ sbc_dif_v1_verify(struct se_cmd *cmd, struct se_dif_v1_tuple *sdt,
return TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED;
}
check_ref:
if (!(cmd->prot_checks & TARGET_DIF_CHECK_REFTAG))
return 0;
if (cmd->prot_type == TARGET_DIF_TYPE1_PROT &&
be32_to_cpu(sdt->ref_tag) != (sector & 0xffffffff)) {
pr_err("DIFv1 Type 1 reference failed on sector: %llu tag: 0x%08x"