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scsi: tcmu: refactor nl dev_cfg attr with new nl helpers 

use new netlink events helpers tcmu_netlink_init() and
tcmu_netlink_send() to refactor netlink event attribute
TCMU_ATTR_DEV_CFG(belongs to TCMU_CMD_RECONFIG_DEVICE) which is also
dev_config in configFS.

Signed-off-by: Zhu Lingshan <lszhu@suse.com>
Acked-by: Mike Christie <mchristi@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Zhu Lingshan 2018-05-02 11:13:42 +08:00 committed by Martin K. Petersen
parent f892bd8ec1
commit 02ccfb54ba
1 changed files with 22 additions and 2 deletions
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24
drivers/target/target_core_user.c
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@ -2241,6 +2241,27 @@ static ssize_t tcmu_dev_config_show(struct config_item *item, char *page)
return snprintf(page, PAGE_SIZE, "%s\n", udev->dev_config);
}
static int tcmu_send_dev_config_event(struct tcmu_dev *udev,
const char *reconfig_data)
{
struct sk_buff *skb = NULL;
void *msg_header = NULL;
int ret = 0;
ret = tcmu_netlink_event_init(udev, TCMU_CMD_RECONFIG_DEVICE,
&skb, &msg_header);
if (ret < 0)
return ret;
ret = nla_put_string(skb, TCMU_ATTR_DEV_CFG, reconfig_data);
if (ret < 0) {
nlmsg_free(skb);
return ret;
}
return tcmu_netlink_event_send(udev, TCMU_CMD_RECONFIG_DEVICE,
&skb, &msg_header);
}
static ssize_t tcmu_dev_config_store(struct config_item *item, const char *page,
size_t count)
{
@ -2255,8 +2276,7 @@ static ssize_t tcmu_dev_config_store(struct config_item *item, const char *page,
/* Check if device has been configured before */
if (tcmu_dev_configured(udev)) {
ret = tcmu_netlink_event(udev, TCMU_CMD_RECONFIG_DEVICE,
TCMU_ATTR_DEV_CFG, page);
ret = tcmu_send_dev_config_event(udev, page);
if (ret) {
pr_err("Unable to reconfigure device\n");
return ret;