When try to execute Persistent Reservation Read Keys, but tcmu_pr_info_get() returns -ENODATA, this means there are no registrations, so we should generate a fake empty struct tcmu_pr_info, so that the code can keep running, but we don't want to store it in the TCMU device, this is different from tcmu_pr_info_init().
Signed-off-by: Zhu Lingshan <[email protected]> --- drivers/target/target_core_user.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/drivers/target/target_core_user.c b/drivers/target/target_core_user.c index c3adff826163..2fcdfc97ca75 100644 --- a/drivers/target/target_core_user.c +++ b/drivers/target/target_core_user.c @@ -2829,6 +2829,23 @@ tcmu_execute_pr_register(struct se_cmd *cmd, u64 old_key, return ret; } +static int tcmu_pr_info_mock_empty(struct tcmu_pr_info **_pr_info) +{ + struct tcmu_pr_info *pr_info; + + pr_info = kzalloc(sizeof(*pr_info), GFP_KERNEL); + if (!pr_info) + return -ENOMEM; + + pr_info->vers = TCMU_PR_INFO_XATTR_VERS; + INIT_LIST_HEAD(&pr_info->regs); + + *_pr_info = pr_info; + pr_debug("successfully initialized mock PR info\n"); + + return 0; +} + static int tcmu_configure_device(struct se_device *dev) { struct tcmu_dev *udev = TCMU_DEV(dev); -- 2.17.1
