diff options
| author | Boaz Harrosh <bharrosh@panasas.com> | 2008-04-30 11:27:26 +0300 |
|---|---|---|
| committer | James Bottomley <James.Bottomley@HansenPartnership.com> | 2008-05-02 11:33:25 -0500 |
| commit | db4742dd8f0aa9125b74f9b2516336a75f3d9106 (patch) | |
| tree | 6820b74e8fbfb13c4eee4c8ef8b59a9132320799 /drivers/scsi/scsi.c | |
| parent | 64a87b244b9297667ca80264aab849a36f494884 (diff) | |
| download | linux-db4742dd8f0aa9125b74f9b2516336a75f3d9106.tar.bz2 | |
[SCSI] add support for variable length extended commands
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>
Diffstat (limited to 'drivers/scsi/scsi.c')
| -rw-r--r-- | drivers/scsi/scsi.c | 15 |
1 files changed, 4 insertions, 11 deletions
diff --git a/drivers/scsi/scsi.c b/drivers/scsi/scsi.c index 749c9c7fc2e1..110e776d1a07 100644 --- a/drivers/scsi/scsi.c +++ b/drivers/scsi/scsi.c @@ -79,15 +79,6 @@ static void scsi_done(struct scsi_cmnd *cmd); #define MIN_RESET_PERIOD (15*HZ) /* - * Macro to determine the size of SCSI command. This macro takes vendor - * unique commands into account. SCSI commands in groups 6 and 7 are - * vendor unique and we will depend upon the command length being - * supplied correctly in cmd_len. - */ -#define CDB_SIZE(cmd) (((((cmd)->cmnd[0] >> 5) & 7) < 6) ? \ - COMMAND_SIZE((cmd)->cmnd[0]) : (cmd)->cmd_len) - -/* * Note - the initial logging level can be set here to log events at boot time. * After the system is up, you may enable logging via the /proc interface. */ @@ -709,9 +700,11 @@ int scsi_dispatch_cmd(struct scsi_cmnd *cmd) * Before we queue this command, check if the command * length exceeds what the host adapter can handle. */ - if (CDB_SIZE(cmd) > cmd->device->host->max_cmd_len) { + if (cmd->cmd_len > cmd->device->host->max_cmd_len) { SCSI_LOG_MLQUEUE(3, - printk("queuecommand : command too long.\n")); + printk("queuecommand : command too long. " + "cdb_size=%d host->max_cmd_len=%d\n", + cmd->cmd_len, cmd->device->host->max_cmd_len)); cmd->result = (DID_ABORT << 16); scsi_done(cmd); |