summaryrefslogtreecommitdiffstats
path: root/drivers/target/target_core_cdb.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/target/target_core_cdb.c')
-rw-r--r--drivers/target/target_core_cdb.c69
1 files changed, 53 insertions, 16 deletions
diff --git a/drivers/target/target_core_cdb.c b/drivers/target/target_core_cdb.c
index 432253034de0..418282d926fa 100644
--- a/drivers/target/target_core_cdb.c
+++ b/drivers/target/target_core_cdb.c
@@ -66,7 +66,7 @@ target_emulate_inquiry_std(struct se_cmd *cmd)
{
struct se_lun *lun = cmd->se_lun;
struct se_device *dev = cmd->se_dev;
- unsigned char *buf = cmd->t_task_buf;
+ unsigned char *buf;
/*
* Make sure we at least have 6 bytes of INQUIRY response
@@ -78,6 +78,8 @@ target_emulate_inquiry_std(struct se_cmd *cmd)
return -EINVAL;
}
+ buf = transport_kmap_first_data_page(cmd);
+
buf[0] = dev->transport->get_device_type(dev);
if (buf[0] == TYPE_TAPE)
buf[1] = 0x80;
@@ -91,7 +93,7 @@ target_emulate_inquiry_std(struct se_cmd *cmd)
if (cmd->data_length < 8) {
buf[4] = 1; /* Set additional length to 1 */
- return 0;
+ goto out;
}
buf[7] = 0x32; /* Sync=1 and CmdQue=1 */
@@ -102,7 +104,7 @@ target_emulate_inquiry_std(struct se_cmd *cmd)
*/
if (cmd->data_length < 36) {
buf[4] = 3; /* Set additional length to 3 */
- return 0;
+ goto out;
}
snprintf((unsigned char *)&buf[8], 8, "LIO-ORG");
@@ -111,6 +113,9 @@ target_emulate_inquiry_std(struct se_cmd *cmd)
snprintf((unsigned char *)&buf[32], 4, "%s",
&dev->se_sub_dev->t10_wwn.revision[0]);
buf[4] = 31; /* Set additional length to 31 */
+
+out:
+ transport_kunmap_first_data_page(cmd);
return 0;
}
@@ -647,9 +652,9 @@ static int
target_emulate_inquiry(struct se_cmd *cmd)
{
struct se_device *dev = cmd->se_dev;
- unsigned char *buf = cmd->t_task_buf;
+ unsigned char *buf;
unsigned char *cdb = cmd->t_task_cdb;
- int p;
+ int p, ret;
if (!(cdb[1] & 0x1))
return target_emulate_inquiry_std(cmd);
@@ -666,14 +671,20 @@ target_emulate_inquiry(struct se_cmd *cmd)
" too small for EVPD=1\n", cmd->data_length);
return -EINVAL;
}
+
+ buf = transport_kmap_first_data_page(cmd);
+
buf[0] = dev->transport->get_device_type(dev);
for (p = 0; p < ARRAY_SIZE(evpd_handlers); ++p)
if (cdb[2] == evpd_handlers[p].page) {
buf[1] = cdb[2];
- return evpd_handlers[p].emulate(cmd, buf);
+ ret = evpd_handlers[p].emulate(cmd, buf);
+ transport_kunmap_first_data_page(cmd);
+ return ret;
}
+ transport_kunmap_first_data_page(cmd);
printk(KERN_ERR "Unknown VPD Code: 0x%02x\n", cdb[2]);
return -EINVAL;
}
@@ -682,7 +693,7 @@ static int
target_emulate_readcapacity(struct se_cmd *cmd)
{
struct se_device *dev = cmd->se_dev;
- unsigned char *buf = cmd->t_task_buf;
+ unsigned char *buf;
unsigned long long blocks_long = dev->transport->get_blocks(dev);
u32 blocks;
@@ -691,6 +702,8 @@ target_emulate_readcapacity(struct se_cmd *cmd)
else
blocks = (u32)blocks_long;
+ buf = transport_kmap_first_data_page(cmd);
+
buf[0] = (blocks >> 24) & 0xff;
buf[1] = (blocks >> 16) & 0xff;
buf[2] = (blocks >> 8) & 0xff;
@@ -705,6 +718,8 @@ target_emulate_readcapacity(struct se_cmd *cmd)
if (dev->se_sub_dev->se_dev_attrib.emulate_tpu || dev->se_sub_dev->se_dev_attrib.emulate_tpws)
put_unaligned_be32(0xFFFFFFFF, &buf[0]);
+ transport_kunmap_first_data_page(cmd);
+
return 0;
}
@@ -712,9 +727,11 @@ static int
target_emulate_readcapacity_16(struct se_cmd *cmd)
{
struct se_device *dev = cmd->se_dev;
- unsigned char *buf = cmd->t_task_buf;
+ unsigned char *buf;
unsigned long long blocks = dev->transport->get_blocks(dev);
+ buf = transport_kmap_first_data_page(cmd);
+
buf[0] = (blocks >> 56) & 0xff;
buf[1] = (blocks >> 48) & 0xff;
buf[2] = (blocks >> 40) & 0xff;
@@ -734,6 +751,8 @@ target_emulate_readcapacity_16(struct se_cmd *cmd)
if (dev->se_sub_dev->se_dev_attrib.emulate_tpu || dev->se_sub_dev->se_dev_attrib.emulate_tpws)
buf[14] = 0x80;
+ transport_kunmap_first_data_page(cmd);
+
return 0;
}
@@ -848,7 +867,7 @@ target_emulate_modesense(struct se_cmd *cmd, int ten)
{
struct se_device *dev = cmd->se_dev;
char *cdb = cmd->t_task_cdb;
- unsigned char *rbuf = cmd->t_task_buf;
+ unsigned char *rbuf;
int type = dev->transport->get_device_type(dev);
int offset = (ten) ? 8 : 4;
int length = 0;
@@ -911,7 +930,10 @@ target_emulate_modesense(struct se_cmd *cmd, int ten)
if ((offset + 1) > cmd->data_length)
offset = cmd->data_length;
}
+
+ rbuf = transport_kmap_first_data_page(cmd);
memcpy(rbuf, buf, offset);
+ transport_kunmap_first_data_page(cmd);
return 0;
}
@@ -920,14 +942,18 @@ static int
target_emulate_request_sense(struct se_cmd *cmd)
{
unsigned char *cdb = cmd->t_task_cdb;
- unsigned char *buf = cmd->t_task_buf;
+ unsigned char *buf;
u8 ua_asc = 0, ua_ascq = 0;
+ int err = 0;
if (cdb[1] & 0x01) {
printk(KERN_ERR "REQUEST_SENSE description emulation not"
" supported\n");
return PYX_TRANSPORT_INVALID_CDB_FIELD;
}
+
+ buf = transport_kmap_first_data_page(cmd);
+
if (!(core_scsi3_ua_clear_for_request_sense(cmd, &ua_asc, &ua_ascq))) {
/*
* CURRENT ERROR, UNIT ATTENTION
@@ -940,7 +966,8 @@ target_emulate_request_sense(struct se_cmd *cmd)
*/
if (cmd->data_length <= 18) {
buf[7] = 0x00;
- return 0;
+ err = -EINVAL;
+ goto end;
}
/*
* The Additional Sense Code (ASC) from the UNIT ATTENTION
@@ -960,7 +987,8 @@ target_emulate_request_sense(struct se_cmd *cmd)
*/
if (cmd->data_length <= 18) {
buf[7] = 0x00;
- return 0;
+ err = -EINVAL;
+ goto end;
}
/*
* NO ADDITIONAL SENSE INFORMATION
@@ -969,6 +997,9 @@ target_emulate_request_sense(struct se_cmd *cmd)
buf[7] = 0x0A;
}
+end:
+ transport_kunmap_first_data_page(cmd);
+
return 0;
}
@@ -981,11 +1012,11 @@ target_emulate_unmap(struct se_task *task)
{
struct se_cmd *cmd = task->task_se_cmd;
struct se_device *dev = cmd->se_dev;
- unsigned char *buf = cmd->t_task_buf, *ptr = NULL;
+ unsigned char *buf, *ptr = NULL;
unsigned char *cdb = &cmd->t_task_cdb[0];
sector_t lba;
unsigned int size = cmd->data_length, range;
- int ret, offset;
+ int ret = 0, offset;
unsigned short dl, bd_dl;
/* First UNMAP block descriptor starts at 8 byte offset */
@@ -993,6 +1024,9 @@ target_emulate_unmap(struct se_task *task)
size -= 8;
dl = get_unaligned_be16(&cdb[0]);
bd_dl = get_unaligned_be16(&cdb[2]);
+
+ buf = transport_kmap_first_data_page(cmd);
+
ptr = &buf[offset];
printk(KERN_INFO "UNMAP: Sub: %s Using dl: %hu bd_dl: %hu size: %hu"
" ptr: %p\n", dev->transport->name, dl, bd_dl, size, ptr);
@@ -1007,7 +1041,7 @@ target_emulate_unmap(struct se_task *task)
if (ret < 0) {
printk(KERN_ERR "blkdev_issue_discard() failed: %d\n",
ret);
- return ret;
+ goto err;
}
ptr += 16;
@@ -1016,7 +1050,10 @@ target_emulate_unmap(struct se_task *task)
task->task_scsi_status = GOOD;
transport_complete_task(task, 1);
- return 0;
+err:
+ transport_kunmap_first_data_page(cmd);
+
+ return ret;
}
/*
generated by cgit (git 2.34.1) at 2024-06-20 08:19:38 +0000