target: Add SCF_ACK_KREF flag for acknowledgement kref

When TARGET_SCF_ACK_KREF is in use with target_submit_cmd() for
setting the extra acknowledgement reference to se_cmd->cmd_kref,
go ahead and set SCF_ACK_KREF in order to be used later by
abort task.

Reported-by: Roland Dreier <roland@purestorage.com>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>

diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c
index 35bae7dd670a2f66343b0074a5a48b647d0647cd..c6b8b82333994e40fdf82da16a40d991f60a1d74 100644 (file)
--- a/drivers/target/target_core_transport.c
+++ b/drivers/target/target_core_transport.c
@@ -4030,8 +4030,10 @@ void target_get_sess_cmd(struct se_session *se_sess, struct se_cmd *se_cmd,
         * fabric acknowledgement that requires two target_put_sess_cmd()
         * invocations before se_cmd descriptor release.
         */
-       if (ack_kref == true)
+       if (ack_kref == true) {
                kref_get(&se_cmd->cmd_kref);
+               se_cmd->se_cmd_flags |= SCF_ACK_KREF;
+       }
 
        spin_lock_irqsave(&se_sess->sess_cmd_lock, flags);
        list_add_tail(&se_cmd->se_cmd_list, &se_sess->sess_cmd_list);

diff --git a/include/target/target_core_base.h b/include/target/target_core_base.h
index 9d514e06625f7321adcbc7fbcbe48c7e0eb42bf6..bbcf803e09160d6303a7311b413f39f19150cef1 100644 (file)
--- a/include/target/target_core_base.h
+++ b/include/target/target_core_base.h
@@ -184,7 +184,8 @@ enum se_cmd_flags_table {
        SCF_ALUA_NON_OPTIMIZED          = 0x00040000,
        SCF_DELAYED_CMD_FROM_SAM_ATTR   = 0x00080000,
        SCF_UNUSED                      = 0x00100000,
-       SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC = 0x00400000,
+       SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC = 0x00200000,
+       SCF_ACK_KREF                    = 0x00400000,
 };
 
 /* struct se_dev_entry->lun_flags and struct se_lun->lun_access */