target_core_configfs: split up ALUA supported states
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linux-mtd at lists.infradead.org
Fri Nov 22 17:59:09 EST 2013
Gitweb: http://git.infradead.org/?p=mtd-2.6.git;a=commit;h=b0a382c58ef5c12804cda4268d7e62bef978789d
Commit: b0a382c58ef5c12804cda4268d7e62bef978789d
Parent: 6be526c45d31840f3384f41f62bcd796d35a9a5b
Author: Hannes Reinecke <hare at suse.de>
AuthorDate: Tue Nov 19 09:07:51 2013 +0100
Committer: Nicholas Bellinger <nab at linux-iscsi.org>
CommitDate: Wed Nov 20 11:38:18 2013 -0800
target_core_configfs: split up ALUA supported states
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 at suse.de>
---
drivers/target/target_core_configfs.c | 127 ++++++++++++++++++++++------------
1 file changed, 84 insertions(+), 43 deletions(-)
diff --git a/drivers/target/target_core_configfs.c b/drivers/target/target_core_configfs.c
index 1e4ea28..272755d 100644
--- a/drivers/target/target_core_configfs.c
+++ b/drivers/target/target_core_configfs.c
@@ -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);
-}
-
-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_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)); \
}
-SE_DEV_ALUA_TG_PT_ATTR(alua_supported_states, S_IRUGO | S_IWUSR);
+#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_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,
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