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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 <[email protected]>
Signed-off-by: Benny Halevy <[email protected]>
Signed-off-by: James Bottomley <[email protected]>
This commit is contained in:
Boaz Harrosh 2008-04-30 11:27:26 +03:00 • committed by James Bottomley
commit db4742dd8f
7 changed files with 47 additions and 35 deletions
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5
block/scsi_ioctl.c
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@ -33,13 +33,12 @@
#include <scsi/scsi_cmnd.h>
/* Command group 3 is reserved and should never be used. */
const unsigned char scsi_command_size[8] =
const unsigned char scsi_command_size_tbl[8] =
{
6, 10, 10, 12,
16, 12, 10, 10
};
EXPORT_SYMBOL(scsi_command_size);
EXPORT_SYMBOL(scsi_command_size_tbl);
#include <scsi/sg.h>