This patch added a function tcmu_execute_pr_register_new() which can help to register an unregistered I_T Nexus.
Signed-off-by: Zhu Lingshan <[email protected]> --- drivers/target/target_core_user.c | 34 +++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+) diff --git a/drivers/target/target_core_user.c b/drivers/target/target_core_user.c index 291b3ff4555d..5d0da54072cd 100644 --- a/drivers/target/target_core_user.c +++ b/drivers/target/target_core_user.c @@ -2505,6 +2505,40 @@ static int tcmu_pr_info_append_reg(struct tcmu_pr_info *pr_info, return 0; } +/* handle PR registration for a currently unregistered I_T nexus */ +static sense_reason_t +tcmu_execute_pr_register_new(struct tcmu_pr_info *pr_info, u64 old_key, + u64 new_key, char *it_nexus, + bool ignore_existing) +{ + sense_reason_t ret; + int rc; + + pr_debug("PR registration for unregistered nexus: %s\n", it_nexus); + if (!ignore_existing && (old_key != 0)) { + ret = TCM_RESERVATION_CONFLICT; + goto out; + } + if (new_key == 0) { + ret = TCM_NO_SENSE; + goto out; + } + /* + * Register the I_T nexus on which the command was received with + * the value specified in the SERVICE ACTION RESERVATION KEY + * field. + */ + rc = tcmu_pr_info_append_reg(pr_info, it_nexus, new_key); + if (rc < 0) { + ret = TCM_OUT_OF_RESOURCES; + goto out; + } + + ret = TCM_NO_SENSE; +out: + return ret; +} + static int tcmu_configure_device(struct se_device *dev) { struct tcmu_dev *udev = TCMU_DEV(dev); -- 2.17.1
