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iscsi-target: add new offload transport type

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Add new transport type ISCSI_HW_OFFLOAD,
hw offload transport drivers will use
this transport type.

Signed-off-by: Varun Prakash <varun@chelsio.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
This commit is contained in:
Varun Prakash 2016-04-20 00:00:16 +05:30 committed by Nicholas Bellinger
parent 864e504ae2
commit 1c46960e33
2 changed files with 77 additions and 0 deletions
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76
drivers/target/iscsi/iscsi_target_configfs.c
View file

@ -182,12 +182,88 @@ out:
return rc;
}
static ssize_t lio_target_np_hw_offload_show(struct config_item *item,
char *page)
{
struct iscsi_tpg_np *tpg_np = to_iscsi_tpg_np(item);
struct iscsi_tpg_np *tpg_np_hw_offload;
ssize_t rb;
tpg_np_hw_offload = iscsit_tpg_locate_child_np(tpg_np,
ISCSI_HW_OFFLOAD);
if (tpg_np_hw_offload)
rb = sprintf(page, "1\n");
else
rb = sprintf(page, "0\n");
return rb;
}
static ssize_t lio_target_np_hw_offload_store(struct config_item *item,
const char *page, size_t count)
{
struct iscsi_tpg_np *tpg_np = to_iscsi_tpg_np(item);
struct iscsi_np *np;
struct iscsi_portal_group *tpg;
struct iscsi_tpg_np *tpg_np_hw_offload = NULL;
u32 op;
int rc = 0;
rc = kstrtou32(page, 0, &op);
if (rc)
return rc;
if ((op != 1) && (op != 0)) {
pr_err("Illegal value for tpg_enable: %u\n", op);
return -EINVAL;
}
np = tpg_np->tpg_np;
if (!np) {
pr_err("Unable to locate struct iscsi_np from"
" struct iscsi_tpg_np\n");
return -EINVAL;
}
tpg = tpg_np->tpg;
if (iscsit_get_tpg(tpg) < 0)
return -EINVAL;
if (op) {
tpg_np_hw_offload = iscsit_tpg_add_network_portal(tpg,
&np->np_sockaddr, tpg_np, ISCSI_HW_OFFLOAD);
if (IS_ERR(tpg_np_hw_offload)) {
rc = PTR_ERR(tpg_np_hw_offload);
goto out;
}
} else {
tpg_np_hw_offload = iscsit_tpg_locate_child_np(tpg_np,
ISCSI_HW_OFFLOAD);
if (tpg_np_hw_offload) {
rc = iscsit_tpg_del_network_portal(tpg,
tpg_np_hw_offload);
if (rc < 0)
goto out;
}
}
iscsit_put_tpg(tpg);
return count;
out:
iscsit_put_tpg(tpg);
return rc;
}
CONFIGFS_ATTR(lio_target_np_, sctp);
CONFIGFS_ATTR(lio_target_np_, iser);
CONFIGFS_ATTR(lio_target_np_, hw_offload);
static struct configfs_attribute *lio_target_portal_attrs[] = {
&lio_target_np_attr_sctp,
&lio_target_np_attr_iser,
&lio_target_np_attr_hw_offload,
NULL,
};

1
include/target/iscsi/iscsi_target_core.h
View file

@ -74,6 +74,7 @@ enum iscsit_transport_type {
ISCSI_IWARP_TCP = 3,
ISCSI_IWARP_SCTP = 4,
ISCSI_INFINIBAND = 5,
ISCSI_HW_OFFLOAD = 6,
};
/* RFC-3720 7.1.4 Standard Connection State Diagram for a Target */