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[SCSI] add support for variable length extended commands

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Add support for variable-length, extended, and vendor specific
CDBs to scsi-ml. It is now possible for initiators and ULD's
to issue these types of commands. LLDs need not change much.
All they need is to raise the .max_cmd_len to the longest command
they support (see iscsi patch).

- clean-up some code paths that did not expect commands to be
  larger than 16, and change cmd_len members' type to short as
  char is not enough.

Signed-off-by: Boaz Harrosh <bharrosh@panasas.com>
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
This commit is contained in:
Boaz Harrosh
2008-04-30 11:27:26 +03:00
committed by James Bottomley
parent 64a87b244b
commit db4742dd8f
7 changed files with 47 additions and 35 deletions
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include/scsi/scsi_cmnd.h
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@ -78,7 +78,7 @@ struct scsi_cmnd {
int allowed;
int timeout_per_command;
unsigned char cmd_len;
unsigned short cmd_len;
enum dma_data_direction sc_data_direction;
/* These elements define the operation we are about to perform */