Re: [PATCH 3/3] scsi-trace: define ZBC_IN and ZBC_OUT

["Ewan D. Milne" <emilne@redhat.com>]

On Thu, 2016-03-24 at 11:23 +0100, Hannes Reinecke wrote:
> Add new trace functions for ZBC_IN and ZBC_OUT.
> 
> Signed-off-by: Hannes Reinecke <hare@suse.com>
> ---
>  drivers/scsi/scsi_trace.c   | 87 +++++++++++++++++++++++++++++++++++++++++++++
>  include/scsi/scsi_proto.h   |  9 +++++
>  include/trace/events/scsi.h |  2 ++
>  3 files changed, 98 insertions(+)
> 
> diff --git a/drivers/scsi/scsi_trace.c b/drivers/scsi/scsi_trace.c
> index b50cfe8..b10ce6c 100644
> --- a/drivers/scsi/scsi_trace.c
> +++ b/drivers/scsi/scsi_trace.c
> @@ -323,6 +323,89 @@ out:
>  }
>  
>  static const char *
> +scsi_trace_zbc_in(struct trace_seq *p, unsigned char *cdb, int len)
> +{
> +	const char *ret = trace_seq_buffer_ptr(p), *cmd;
> +	sector_t zone_id = 0;
> +	u32 alloc_len = 0;
> +	u8 options;
> +
> +	switch (SERVICE_ACTION16(cdb)) {
> +	case ZI_REPORT_ZONES:
> +		cmd = "REPORT_ZONES";
> +		break;
> +	default:
> +		trace_seq_puts(p, "UNKNOWN");
> +		goto out;
> +	}
> +
> +	zone_id |= ((u64)cdb[2] << 56);
> +	zone_id |= ((u64)cdb[3] << 48);
> +	zone_id |= ((u64)cdb[4] << 40);
> +	zone_id |= ((u64)cdb[5] << 32);
> +	zone_id |= (cdb[6] << 24);
> +	zone_id |= (cdb[7] << 16);
> +	zone_id |= (cdb[8] << 8);
> +	zone_id |=  cdb[9];
> +	alloc_len |= (cdb[10] << 24);
> +	alloc_len |= (cdb[11] << 16);
> +	alloc_len |= (cdb[12] << 8);
> +	alloc_len |=  cdb[13];
> +	options = cdb[14] & 0x3f;
> +
> +	trace_seq_printf(p, "%s zone=%llu alloc_len=%u options=%u partial=%u",
> +			 cmd, (unsigned long long)zone_id, alloc_len,
> +			 options, (cdb[14] >> 7) & 1);
> +
> +out:
> +	trace_seq_putc(p, 0);
> +
> +	return ret;
> +}
> +
> +static const char *
> +scsi_trace_zbc_out(struct trace_seq *p, unsigned char *cdb, int len)
> +{
> +	const char *ret = trace_seq_buffer_ptr(p), *cmd;
> +	sector_t zone_id = 0;
> +
> +	switch (SERVICE_ACTION16(cdb)) {
> +	case ZO_CLOSE_ZONE:
> +		cmd = "CLOSE_ZONE";
> +		break;
> +	case ZO_FINISH_ZONE:
> +		cmd = "FINISH_ZONE";
> +		break;
> +	case ZO_OPEN_ZONE:
> +		cmd = "OPEN_ZONE";
> +		break;
> +	case ZO_RESET_WRITE_POINTER:
> +		cmd = "RESET_WRITE_POINTER";
> +		break;
> +	default:
> +		trace_seq_puts(p, "UNKNOWN");
> +		goto out;
> +	}
> +
> +	zone_id |= ((u64)cdb[2] << 56);
> +	zone_id |= ((u64)cdb[3] << 48);
> +	zone_id |= ((u64)cdb[4] << 40);
> +	zone_id |= ((u64)cdb[5] << 32);
> +	zone_id |= (cdb[6] << 24);
> +	zone_id |= (cdb[7] << 16);
> +	zone_id |= (cdb[8] << 8);
> +	zone_id |=  cdb[9];
> +
> +	trace_seq_printf(p, "%s zone=%llu all=%u", cmd,
> +			 (unsigned long long)zone_id, cdb[14] & 1);
> +
> +out:
> +	trace_seq_putc(p, 0);
> +
> +	return ret;
> +}
> +
> +static const char *
>  scsi_trace_varlen(struct trace_seq *p, unsigned char *cdb, int len)
>  {
>  	switch (SERVICE_ACTION32(cdb)) {
> @@ -378,6 +461,10 @@ scsi_trace_parse_cdb(struct trace_seq *p, unsigned char *cdb, int len)
>  		return scsi_trace_maintenance_in(p, cdb, len);
>  	case MAINTENANCE_OUT:
>  		return scsi_trace_maintenance_out(p, cdb, len);
> +	case ZBC_IN:
> +		return scsi_trace_zbc_in(p, cdb, len);
> +	case ZBC_OUT:
> +		return scsi_trace_zbc_out(p, cdb, len);
>  	default:
>  		return scsi_trace_misc(p, cdb, len);
>  	}
> diff --git a/include/scsi/scsi_proto.h b/include/scsi/scsi_proto.h
> index c2ae21c..086bff9 100644
> --- a/include/scsi/scsi_proto.h
> +++ b/include/scsi/scsi_proto.h
> @@ -115,6 +115,8 @@
>  #define VERIFY_16	      0x8f
>  #define SYNCHRONIZE_CACHE_16  0x91
>  #define WRITE_SAME_16	      0x93
> +#define ZBC_OUT		      0x94
> +#define ZBC_IN		      0x95
>  #define SERVICE_ACTION_BIDIRECTIONAL 0x9d
>  #define SERVICE_ACTION_IN_16  0x9e
>  #define SERVICE_ACTION_OUT_16 0x9f
> @@ -143,6 +145,13 @@
>  #define MO_SET_PRIORITY       0x0e
>  #define MO_SET_TIMESTAMP      0x0f
>  #define MO_MANAGEMENT_PROTOCOL_OUT 0x10
> +/* values for ZBC_IN */
> +#define ZI_REPORT_ZONES	      0x00
> +/* values for ZBC_OUT */
> +#define ZO_CLOSE_ZONE	      0x01
> +#define ZO_OPEN_ZONE	      0x02
> +#define ZO_FINISH_ZONE	      0x03
> +#define ZO_RESET_WRITE_POINTER 0x04
>  /* values for variable length command */
>  #define XDREAD_32	      0x03
>  #define XDWRITE_32	      0x04
> diff --git a/include/trace/events/scsi.h b/include/trace/events/scsi.h
> index 5c0d91f..9a9b3e2 100644
> --- a/include/trace/events/scsi.h
> +++ b/include/trace/events/scsi.h
> @@ -94,6 +94,8 @@
>  		scsi_opcode_name(WRITE_16),			\
>  		scsi_opcode_name(VERIFY_16),			\
>  		scsi_opcode_name(WRITE_SAME_16),		\
> +		scsi_opcode_name(ZBC_OUT),			\
> +		scsi_opcode_name(ZBC_IN),			\
>  		scsi_opcode_name(SERVICE_ACTION_IN_16),		\
>  		scsi_opcode_name(READ_32),			\
>  		scsi_opcode_name(WRITE_32),			\

Reviewed-by: Ewan D. Milne <emilne@redhat.com>