This patch added a function tcmu_send_get_pr_info_event() to get Persistent Reservation info from a TCMU device, added it's wrapper function tcmu_get_dev_pr_info() as well.
Signed-off-by: Zhu Lingshan <[email protected]> --- drivers/target/target_core_user.c | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) diff --git a/drivers/target/target_core_user.c b/drivers/target/target_core_user.c index 1efc2800ca14..a1ed70d0988a 100644 --- a/drivers/target/target_core_user.c +++ b/drivers/target/target_core_user.c @@ -1683,6 +1683,21 @@ static int tcmu_send_dev_remove_event(struct tcmu_dev *udev) &skb, &msg_header); } +static int tcmu_send_get_pr_info_event(struct tcmu_dev *udev) +{ + struct sk_buff *skb = NULL; + void *msg_header = NULL; + int ret = 0; + + ret = tcmu_netlink_event_init(udev, TCMU_CMD_GET_PR_INFO, + &skb, &msg_header); + if (ret < 0) + return ret; + + return tcmu_netlink_event_send(udev, TCMU_CMD_GET_PR_INFO, + &skb, &msg_header); +} + static int tcmu_update_uio_info(struct tcmu_dev *udev) { struct tcmu_hba *hba = udev->hba->hba_ptr; @@ -1709,6 +1724,22 @@ static int tcmu_update_uio_info(struct tcmu_dev *udev) return 0; } +/* + * This funtion will get PR INFO(a string)from a TCMU device. + * PR INFO will be stored at udev->pr_info.pr_info_buf. + */ +static int tcmu_get_dev_pr_info(struct tcmu_dev *udev, int *val_len) +{ + int ret = 0; + + ret = tcmu_send_get_pr_info_event(udev); + *val_len = strlen(udev->pr_info.pr_info_buf); + if (*val_len == 0) + ret = -ENODATA; + + return ret; +} + static int tcmu_configure_device(struct se_device *dev) { struct tcmu_dev *udev = TCMU_DEV(dev); -- 2.17.1
