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target_core_configfs: split up ALUA supported states

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Split up the various ALUA states into individual attributes to
make parsing easier and adhere to the one value per attribute
sysfs principle.

(nab: Convert strict_strtoul -> kstrtoul usage)

Signed-off-by: Hannes Reinecke <hare@suse.de>
This commit is contained in:
Hannes Reinecke 2013-11-19 09:07:51 +01:00 committed by Nicholas Bellinger
parent 6be526c45d
commit b0a382c58e
1 changed files with 83 additions and 42 deletions
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125
drivers/target/target_core_configfs.c
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@ -2133,51 +2133,86 @@ 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);
#define SE_DEV_ALUA_SUPPORT_STATE_SHOW(_name, _var, _bit) \
static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_support_##_name( \
struct t10_alua_tg_pt_gp *t, char *p) \
{ \
return sprintf(p, "%d\n", !!(t->_var & _bit)); \
}
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;
#define SE_DEV_ALUA_SUPPORT_STATE_STORE(_name, _var, _bit) \
static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_support_##_name(\
struct t10_alua_tg_pt_gp *t, const char *p, size_t c) \
{ \
unsigned long tmp; \
int ret; \
\
if (!t->tg_pt_gp_valid_id) { \
pr_err("Unable to do set ##_name ALUA state on non" \
" valid tg_pt_gp ID: %hu\n", \
t->tg_pt_gp_valid_id); \
return -EINVAL; \
} \
\
ret = kstrtoul(p, 0, &tmp); \
if (ret < 0) { \
pr_err("Invalid value '%s', must be '0' or '1'\n", p); \
return -EINVAL; \
} \
if (tmp > 1) { \
pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \
return -EINVAL; \
} \
if (!tmp) \
t->_var |= _bit; \
else \
t->_var &= ~_bit; \
\
return c; \
}
SE_DEV_ALUA_TG_PT_ATTR(alua_supported_states, S_IRUGO | S_IWUSR);
SE_DEV_ALUA_SUPPORT_STATE_SHOW(transitioning,
tg_pt_gp_alua_supported_states, ALUA_T_SUP);
SE_DEV_ALUA_SUPPORT_STATE_STORE(transitioning,
tg_pt_gp_alua_supported_states, ALUA_T_SUP);
SE_DEV_ALUA_TG_PT_ATTR(alua_support_transitioning, S_IRUGO | S_IWUSR);
SE_DEV_ALUA_SUPPORT_STATE_SHOW(offline,
tg_pt_gp_alua_supported_states, ALUA_O_SUP);
SE_DEV_ALUA_SUPPORT_STATE_STORE(offline,
tg_pt_gp_alua_supported_states, ALUA_O_SUP);
SE_DEV_ALUA_TG_PT_ATTR(alua_support_offline, S_IRUGO | S_IWUSR);
SE_DEV_ALUA_SUPPORT_STATE_SHOW(lba_dependent,
tg_pt_gp_alua_supported_states, ALUA_LBD_SUP);
SE_DEV_ALUA_SUPPORT_STATE_STORE(lba_dependent,
tg_pt_gp_alua_supported_states, ALUA_LBD_SUP);
SE_DEV_ALUA_TG_PT_ATTR(alua_support_lba_dependent, S_IRUGO | S_IWUSR);
SE_DEV_ALUA_SUPPORT_STATE_SHOW(unavailable,
tg_pt_gp_alua_supported_states, ALUA_U_SUP);
SE_DEV_ALUA_SUPPORT_STATE_STORE(unavailable,
tg_pt_gp_alua_supported_states, ALUA_U_SUP);
SE_DEV_ALUA_TG_PT_ATTR(alua_support_unavailable, S_IRUGO | S_IWUSR);
SE_DEV_ALUA_SUPPORT_STATE_SHOW(standby,
tg_pt_gp_alua_supported_states, ALUA_S_SUP);
SE_DEV_ALUA_SUPPORT_STATE_STORE(standby,
tg_pt_gp_alua_supported_states, ALUA_S_SUP);
SE_DEV_ALUA_TG_PT_ATTR(alua_support_standby, S_IRUGO | S_IWUSR);
SE_DEV_ALUA_SUPPORT_STATE_SHOW(active_optimized,
tg_pt_gp_alua_supported_states, ALUA_AO_SUP);
SE_DEV_ALUA_SUPPORT_STATE_STORE(active_optimized,
tg_pt_gp_alua_supported_states, ALUA_AO_SUP);
SE_DEV_ALUA_TG_PT_ATTR(alua_support_active_optimized, S_IRUGO | S_IWUSR);
SE_DEV_ALUA_SUPPORT_STATE_SHOW(active_nonoptimized,
tg_pt_gp_alua_supported_states, ALUA_AN_SUP);
SE_DEV_ALUA_SUPPORT_STATE_STORE(active_nonoptimized,
tg_pt_gp_alua_supported_states, ALUA_AN_SUP);
SE_DEV_ALUA_TG_PT_ATTR(alua_support_active_nonoptimized, S_IRUGO | S_IWUSR);
/*
* alua_write_metadata
@ -2399,7 +2434,13 @@ 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_support_transitioning.attr,
&target_core_alua_tg_pt_gp_alua_support_offline.attr,
&target_core_alua_tg_pt_gp_alua_support_lba_dependent.attr,
&target_core_alua_tg_pt_gp_alua_support_unavailable.attr,
&target_core_alua_tg_pt_gp_alua_support_standby.attr,
&target_core_alua_tg_pt_gp_alua_support_active_nonoptimized.attr,
&target_core_alua_tg_pt_gp_alua_support_active_optimized.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,