admin/libiscsi
1
0
Fork 0
Code Issues Pull Requests Actions 2 Packages Projects Releases Wiki Activity

Initial support for PERSISTENT_RESERVER_OUT and add a simple test to show the api

Browse Source
This commit is contained in:
Ronnie Sahlberg
2012-12-17 21:25:46 -08:00
parent d324a94051
commit 2a74fc00bc
11 changed files with 296 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

100
lib/scsi-lowlevel.c
View File

@@ -38,6 +38,8 @@
#include "slist.h"
#include "scsi-lowlevel.h"
void scsi_task_set_iov_out(struct scsi_task *task, struct scsi_iovec *iov, int niov);
struct scsi_allocated_memory {
struct scsi_allocated_memory *next;
char buf[0];
@@ -186,6 +188,19 @@ scsi_get_uint16(const unsigned char *c)
return ntohs(*(uint16_t *)c);
}
inline void
scsi_set_uint64(unsigned char *c, uint64_t v)
{
uint32_t val;
val = (v >> 32) & 0xffffffff;
*(uint32_t *)c = htonl(val);
c += 4;
val = v & 0xffffffff;
*(uint32_t *)c = htonl(val);
}
inline void
scsi_set_uint32(unsigned char *c, uint32_t val)
{
@@ -1702,6 +1717,91 @@ scsi_cdb_persistent_reserve_in(enum scsi_persistent_in_sa sa, uint16_t xferlen)
return task;
}
/*
* PERSISTENT_RESERVE_OUT
*/
struct scsi_task *
scsi_cdb_persistent_reserve_out(enum scsi_persistent_out_sa sa, enum scsi_persistent_out_scope scope, enum scsi_persistent_out_type type, void *param)
{
struct scsi_task *task;
struct scsi_persistent_reserve_out_basic *basic;
struct scsi_iovec *iov;
unsigned char *buf;
int xferlen;
task = malloc(sizeof(struct scsi_task));
if (task == NULL) {
return NULL;
}
iov = scsi_malloc(task, sizeof(struct scsi_iovec));
if (iov == NULL) {
free(task);
return NULL;
}
switch(sa) {
case SCSI_PERSISTENT_RESERVE_REGISTER:
case SCSI_PERSISTENT_RESERVE_RESERVE:
case SCSI_PERSISTENT_RESERVE_RELEASE:
case SCSI_PERSISTENT_RESERVE_CLEAR:
case SCSI_PERSISTENT_RESERVE_PREEMPT:
case SCSI_PERSISTENT_RESERVE_PREEMPT_AND_ABORT:
case SCSI_PERSISTENT_RESERVE_REGISTER_AND_IGNORE_EXISTING_KEY:
basic = param;
xferlen = 24;
buf = scsi_malloc(task, xferlen);
if (buf == NULL) {
free(task);
free(iov);
return NULL;
}
memset(buf, 0, xferlen);
scsi_set_uint64(&buf[0], basic->reservation_key);
scsi_set_uint64(&buf[8], basic->service_action_reservation_key);
if (basic->spec_i_pt) {
buf[20] |= 0x08;
}
if (basic->all_tg_pt) {
buf[20] |= 0x04;
}
if (basic->aptpl) {
buf[20] |= 0x01;
}
break;
case SCSI_PERSISTENT_RESERVE_REGISTER_AND_MOVE:
/* XXX FIXME */
free(task);
free(iov);
return NULL;
default:
free(task);
free(iov);
return NULL;
}
memset(task, 0, sizeof(struct scsi_task));
task->cdb[0] = SCSI_OPCODE_PERSISTENT_RESERVE_OUT;
task->cdb[1] |= sa & 0x1f;
task->cdb[2] = ((scope << 4) & 0xf0) | (type & 0x0f);
scsi_set_uint32(&task->cdb[5], xferlen);
task->cdb_size = 10;
task->xfer_dir = SCSI_XFER_WRITE;
task->expxferlen = xferlen;
iov->iov_base = buf;
iov->iov_len = xferlen;
scsi_task_set_iov_out(task, iov, 1);
return task;
}
/*
* WRITE_SAME10
*/