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target_core_alua: Make supported states configurable

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Signed-off-by: Hannes Reinecke <hare@suse.de>
This commit is contained in:
Hannes Reinecke 2013-11-19 09:07:50 +01:00 committed by Nicholas Bellinger
parent c0dc941e2b
commit 6be526c45d
1 changed files with 50 additions and 0 deletions
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50
drivers/target/target_core_configfs.c
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@ -2130,6 +2130,55 @@ static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_type(
SE_DEV_ALUA_TG_PT_ATTR(alua_access_type, S_IRUGO | S_IWUSR);
/*
* alua_supported_states
*/
static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_supported_states(
struct t10_alua_tg_pt_gp *tg_pt_gp,
char *page)
{
return sprintf(page, "%02x\n",
tg_pt_gp->tg_pt_gp_alua_supported_states);
}
static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_supported_states(
struct t10_alua_tg_pt_gp *tg_pt_gp,
const char *page,
size_t count)
{
unsigned long tmp;
int new_states, valid_states, ret;
if (!tg_pt_gp->tg_pt_gp_valid_id) {
pr_err("Unable to do set supported ALUA states on non"
" valid tg_pt_gp ID: %hu\n",
tg_pt_gp->tg_pt_gp_valid_id);
return -EINVAL;
}
ret = strict_strtoul(page, 0, &tmp);
if (ret < 0) {
pr_err("Unable to extract new supported ALUA states"
" from %s\n", page);
return -EINVAL;
}
new_states = (int)tmp;
valid_states = ALUA_T_SUP | ALUA_O_SUP | ALUA_LBD_SUP | \
ALUA_U_SUP | ALUA_S_SUP | ALUA_AN_SUP | ALUA_AO_SUP;
if (new_states & ~valid_states) {
pr_err("Illegal supported ALUA states: 0x%02x\n",
new_states);
return -EINVAL;
}
tg_pt_gp->tg_pt_gp_alua_supported_states = new_states;
return count;
}
SE_DEV_ALUA_TG_PT_ATTR(alua_supported_states, S_IRUGO | S_IWUSR);
/*
* alua_write_metadata
*/
@ -2350,6 +2399,7 @@ static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
&target_core_alua_tg_pt_gp_alua_access_state.attr,
&target_core_alua_tg_pt_gp_alua_access_status.attr,
&target_core_alua_tg_pt_gp_alua_access_type.attr,
&target_core_alua_tg_pt_gp_alua_supported_states.attr,
&target_core_alua_tg_pt_gp_alua_write_metadata.attr,
&target_core_alua_tg_pt_gp_nonop_delay_msecs.attr,
&target_core_alua_tg_pt_gp_trans_delay_msecs.attr,