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target/user: Update example code for new ABI requirements

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We now require that the userspace handler set a bit if the command is not
handled.

Update calls to tcmu_hdr_get_op for v2.

Signed-off-by: Andy Grover <agrover@redhat.com>
Reviewed-by: Ilias Tsitsimpis <iliastsi@arrikto.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
This commit is contained in:
Andy Grover 2015-05-19 14:44:38 -07:00 committed by Nicholas Bellinger
parent 5a7125c64d
commit cf87edc602
1 changed files with 6 additions and 2 deletions
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8
Documentation/target/tcmu-design.txt
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@ -324,7 +324,7 @@ int handle_device_events(int fd, void *map)
/* Process events from cmd ring until we catch up with cmd_head */
while (ent != (void *)mb + mb->cmdr_off + mb->cmd_head) {
if (tcmu_hdr_get_op(&ent->hdr) == TCMU_OP_CMD) {
if (tcmu_hdr_get_op(ent->hdr.len_op) == TCMU_OP_CMD) {
uint8_t *cdb = (void *)mb + ent->req.cdb_off;
bool success = true;
@ -339,8 +339,12 @@ int handle_device_events(int fd, void *map)
ent->rsp.scsi_status = SCSI_CHECK_CONDITION;
}
}
else if (tcmu_hdr_get_op(ent->hdr.len_op) != TCMU_OP_PAD) {
/* Tell the kernel we didn't handle unknown opcodes */
ent->hdr.uflags |= TCMU_UFLAG_UNKNOWN_OP;
}
else {
/* Do nothing for PAD entries */
/* Do nothing for PAD entries except update cmd_tail */
}
/* update cmd_tail */