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scst: Introduce the function __scst_tgt_set_state()

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This patch does not change any functionality.


git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@9119 d57e44dd-8a1f-0410-8b47-8ef2f437770f
This commit is contained in:
Bart Van Assche
2020-08-10 00:29:09 +00:00
parent 6616eb6cf7
commit e0c63c52e7
1 changed files with 26 additions and 7 deletions
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scst/src/scst_tg.c
+26 -7
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@@ -963,6 +963,30 @@ out_fail:
goto out_unlock;
}
/*
* __scst_tgt_set_state - Update the ALUA filter of a LUN
* @tg: ALUA target group of which the state is changing.
* @tgt_dev: LUN to be updated.
* @state: new ALUA state.
*/
static void __scst_tgt_set_state(struct scst_target_group *tg,
struct scst_tgt_dev *tgt_dev, enum scst_tg_state state)
{
bool gen_ua = state != SCST_TG_STATE_TRANSITIONING;
struct scst_tgt *tgt = tgt_dev->sess->tgt;
struct scst_dev_group *dg = tg->dg;
/*
* If the ALUA state transition is caused by an STPG command and if
* the STPG command has been received through the target port of which
* the state is being modified, do not generate a unit attention.
*/
if (dg->stpg_rel_tgt_id == tgt->rel_tgt_id &&
tid_equal(dg->stpg_transport_id, tgt_dev->sess->transport_id))
gen_ua = false;
scst_tg_change_tgt_dev_state(tgt_dev, state, gen_ua);
}
/*
* Update the ALUA filter of those LUNs (tgt_dev) whose target port is a member
* of target group @tg and that export a device that is a member of the device
@@ -992,13 +1016,8 @@ static void __scst_tg_set_state(struct scst_target_group *tg,
tgt = tgt_dev->sess->tgt;
list_for_each_entry(tg_tgt, &tg->tgt_list, entry) {
if (tg_tgt->tgt == tgt) {
bool gen_ua = (state != SCST_TG_STATE_TRANSITIONING);
if ((tg->dg->stpg_rel_tgt_id == tgt_dev->sess->tgt->rel_tgt_id) &&
tid_equal(tg->dg->stpg_transport_id, tgt_dev->sess->transport_id))
gen_ua = false;
scst_tg_change_tgt_dev_state(tgt_dev,
state, gen_ua);
__scst_tgt_set_state(tg, tgt_dev,
state);
break;
}
}