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scsi: target: Add WRITE_ATOMIC_16 handler

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Add the core LIO code to process the WRITE_ATOMIC_16 command.

Signed-off-by: Mike Christie <michael.christie@oracle.com>
jpg: fix return code from sbc_check_atomic, reformat
Signed-off-by: John Garry <john.g.garry@oracle.com>
Link: https://patch.msgid.link/20251020103820.2917593-5-john.g.garry@oracle.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Mike Christie
2025-10-20 10:38:17 +00:00
committed by Martin K. Petersen
parent c486634fe2
commit 5261457251
2 changed files with 52 additions and 0 deletions
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51
drivers/target/target_core_sbc.c
View File

@@ -764,6 +764,49 @@ sbc_check_dpofua(struct se_device *dev, struct se_cmd *cmd, unsigned char *cdb)
return 0;
}
static sense_reason_t
sbc_check_atomic(struct se_device *dev, struct se_cmd *cmd, unsigned char *cdb)
{
struct se_dev_attrib *attrib = &dev->dev_attrib;
u16 boundary, transfer_len;
u64 lba;
lba = transport_lba_64(cdb);
boundary = get_unaligned_be16(&cdb[10]);
transfer_len = get_unaligned_be16(&cdb[12]);
if (!attrib->atomic_max_len)
return TCM_UNSUPPORTED_SCSI_OPCODE;
if (boundary) {
if (transfer_len > attrib->atomic_max_with_boundary)
return TCM_INVALID_CDB_FIELD;
if (boundary > attrib->atomic_max_boundary)
return TCM_INVALID_CDB_FIELD;
} else {
if (transfer_len > attrib->atomic_max_len)
return TCM_INVALID_CDB_FIELD;
}
if (attrib->atomic_granularity) {
if (transfer_len % attrib->atomic_granularity)
return TCM_INVALID_CDB_FIELD;
if (boundary && boundary % attrib->atomic_granularity)
return TCM_INVALID_CDB_FIELD;
}
if (dev->dev_attrib.atomic_alignment) {
u64 _lba = lba;
if (do_div(_lba, dev->dev_attrib.atomic_alignment))
return TCM_INVALID_CDB_FIELD;
}
return 0;
}
sense_reason_t
sbc_parse_cdb(struct se_cmd *cmd, struct exec_cmd_ops *ops)
{
@@ -861,6 +904,7 @@ sbc_parse_cdb(struct se_cmd *cmd, struct exec_cmd_ops *ops)
break;
case WRITE_16:
case WRITE_VERIFY_16:
case WRITE_ATOMIC_16:
sectors = transport_get_sectors_16(cdb);
cmd->t_task_lba = transport_lba_64(cdb);
@@ -872,6 +916,13 @@ sbc_parse_cdb(struct se_cmd *cmd, struct exec_cmd_ops *ops)
return ret;
cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB;
if (cdb[0] == WRITE_ATOMIC_16) {
cmd->se_cmd_flags |= SCF_ATOMIC;
ret = sbc_check_atomic(dev, cmd, cdb);
if (ret)
return ret;
}
cmd->execute_cmd = sbc_execute_rw;
break;
case VARIABLE_LENGTH_CMD:

1
include/target/target_core_base.h
View File

@@ -158,6 +158,7 @@ enum se_cmd_flags_table {
SCF_TASK_ATTR_SET = (1 << 17),
SCF_TREAT_READ_AS_NORMAL = (1 << 18),
SCF_TASK_ORDERED_SYNC = (1 << 19),
SCF_ATOMIC = (1 << 20),
};
/*