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iscsi-target: Remove SCF_SE_LUN_CMD flag abuses

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This patch removes a number of SCF_SE_LUN_CMD flag abuses within iscsi-target
code to determine when iscsit_release_cmd() or transport_generic_free_cmd()
should be called while releasing an individual iscsi_cmd descriptor.

In the place of SCF_SE_LUN_CMD checks, this patch converts existing code to
use a new iscsit_free_cmd() that inspects iscsi_cmd->iscsi_opcode types to
determine which of the above functions should be invoked.  It also removes the
now unnecessary special case checking in iscsit_release_commands_from_conn().

(hch: Use iscsit_free_cmd instead of open-coded alternative)

Reported-by: Christoph Hellwig <hch@lst.de>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
This commit is contained in:
Nicholas Bellinger
2011-10-09 01:48:14 -07:00
rodzic d14921d6ad
commit d270190a75
4 zmienionych plików z 28 dodań i 56 usunięć
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35
drivers/target/iscsi/iscsi_target_erl2.c
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@@ -143,10 +143,7 @@ void iscsit_free_connection_recovery_entires(struct iscsi_session *sess)
list_del(&cmd->i_list);
cmd->conn = NULL;
spin_unlock(&cr->conn_recovery_cmd_lock);
if (!(cmd->se_cmd.se_cmd_flags & SCF_SE_LUN_CMD))
iscsit_release_cmd(cmd);
else
transport_generic_free_cmd(&cmd->se_cmd, 1);
iscsit_free_cmd(cmd);
spin_lock(&cr->conn_recovery_cmd_lock);
}
spin_unlock(&cr->conn_recovery_cmd_lock);
@@ -168,10 +165,7 @@ void iscsit_free_connection_recovery_entires(struct iscsi_session *sess)
list_del(&cmd->i_list);
cmd->conn = NULL;
spin_unlock(&cr->conn_recovery_cmd_lock);
if (!(cmd->se_cmd.se_cmd_flags & SCF_SE_LUN_CMD))
iscsit_release_cmd(cmd);
else
transport_generic_free_cmd(&cmd->se_cmd, 1);
iscsit_free_cmd(cmd);
spin_lock(&cr->conn_recovery_cmd_lock);
}
spin_unlock(&cr->conn_recovery_cmd_lock);
@@ -256,10 +250,7 @@ void iscsit_discard_cr_cmds_by_expstatsn(
iscsit_remove_cmd_from_connection_recovery(cmd, sess);
spin_unlock(&cr->conn_recovery_cmd_lock);
if (!(cmd->se_cmd.se_cmd_flags & SCF_SE_LUN_CMD))
iscsit_release_cmd(cmd);
else
transport_generic_free_cmd(&cmd->se_cmd, 1);
iscsit_free_cmd(cmd);
spin_lock(&cr->conn_recovery_cmd_lock);
}
spin_unlock(&cr->conn_recovery_cmd_lock);
@@ -313,10 +304,7 @@ int iscsit_discard_unacknowledged_ooo_cmdsns_for_conn(struct iscsi_conn *conn)
list_del(&cmd->i_list);
spin_unlock_bh(&conn->cmd_lock);
if (!(cmd->se_cmd.se_cmd_flags & SCF_SE_LUN_CMD))
iscsit_release_cmd(cmd);
else
transport_generic_free_cmd(&cmd->se_cmd, 1);
iscsit_free_cmd(cmd);
spin_lock_bh(&conn->cmd_lock);
}
spin_unlock_bh(&conn->cmd_lock);
@@ -369,11 +357,7 @@ int iscsit_prepare_cmds_for_realligance(struct iscsi_conn *conn)
list_del(&cmd->i_list);
spin_unlock_bh(&conn->cmd_lock);
if (!(cmd->se_cmd.se_cmd_flags & SCF_SE_LUN_CMD))
iscsit_release_cmd(cmd);
else
transport_generic_free_cmd(&cmd->se_cmd, 1);
iscsit_free_cmd(cmd);
spin_lock_bh(&conn->cmd_lock);
continue;
}
@@ -393,11 +377,7 @@ int iscsit_prepare_cmds_for_realligance(struct iscsi_conn *conn)
(cmd->cmd_sn >= conn->sess->exp_cmd_sn)) {
list_del(&cmd->i_list);
spin_unlock_bh(&conn->cmd_lock);
if (!(cmd->se_cmd.se_cmd_flags & SCF_SE_LUN_CMD))
iscsit_release_cmd(cmd);
else
transport_generic_free_cmd(&cmd->se_cmd, 1);
iscsit_free_cmd(cmd);
spin_lock_bh(&conn->cmd_lock);
continue;
}
@@ -422,8 +402,7 @@ int iscsit_prepare_cmds_for_realligance(struct iscsi_conn *conn)
iscsit_free_all_datain_reqs(cmd);
if (cmd->se_cmd.se_cmd_flags & SCF_SE_LUN_CMD)
transport_wait_for_tasks(&cmd->se_cmd);
transport_wait_for_tasks(&cmd->se_cmd);
/*
* Add the struct iscsi_cmd to the connection recovery cmd list
*/