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SBC: Add support for WRITESAME10 and a simple test for using writesame10 to unmap blocks from thin provisioned luns

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This commit is contained in:
Ronnie Sahlberg
2012-04-28 13:55:37 +10:00
parent dc01df1e00
commit cc0fa15e14
9 changed files with 278 additions and 1 deletions
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44
lib/scsi-lowlevel.c
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@@ -789,6 +789,50 @@ scsi_cdb_unmap(int anchor, int group, uint16_t xferlen)
return task;
}
/*
* WRITE_SAME10
*/
struct scsi_task *
scsi_cdb_writesame10(int wrprotect, int anchor, int unmap, int pbdata, int lbdata, uint32_t lba, int group, uint16_t num_blocks)
{
struct scsi_task *task;
task = malloc(sizeof(struct scsi_task));
if (task == NULL) {
return NULL;
}
memset(task, 0, sizeof(struct scsi_task));
task->cdb[0] = SCSI_OPCODE_WRITE_SAME10;
if (wrprotect) {
task->cdb[1] |= ((wrprotect & 0x7) << 5);
}
if (anchor) {
task->cdb[1] |= 0x10;
}
if (unmap) {
task->cdb[1] |= 0x08;
}
if (pbdata) {
task->cdb[1] |= 0x04;
}
if (lbdata) {
task->cdb[1] |= 0x02;
}
*(uint32_t *)&task->cdb[2] = htonl(lba);
if (group) {
task->cdb[6] |= (group & 0x1f);
}
*(uint16_t *)&task->cdb[7] = htons(num_blocks);
task->cdb_size = 10;
task->xfer_dir = SCSI_XFER_WRITE;
task->expxferlen = 512;
return task;
}
/*
* MODESENSE6
*/