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| author |   Hannes Reinecke <hare@suse.de> | 2013-11-19 09:07:50 +0100 |
|---|---|---|
| committer |   Nicholas Bellinger <nab@linux-iscsi.org> | 2013-11-20 11:28:07 -0800 |
| commit | 6be526c45d31840f3384f41f62bcd796d35a9a5b (patch) | |
| tree | 40c6fa908da4a23476fc6925a15368ca72296b44 /drivers/target | |
| parent | target_core_alua: Store supported ALUA states (diff) | |
| download | linux-dev-6be526c45d31840f3384f41f62bcd796d35a9a5b.tar.xz linux-dev-6be526c45d31840f3384f41f62bcd796d35a9a5b.zip | |
target_core_alua: Make supported states configurable
Signed-off-by: Hannes Reinecke <hare@suse.de>
Diffstat (limited to 'drivers/target')
| -rw-r--r-- | drivers/target/target_core_configfs.c | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/drivers/target/target_core_configfs.c b/drivers/target/target_core_configfs.c index 3a964fbf50ee..1e4ea288303a 100644 --- a/drivers/target/target_core_configfs.c +++ b/drivers/target/target_core_configfs.c @@ -2131,6 +2131,55 @@ 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 */ static ssize_t target_core_alua_tg_pt_gp_show_attr_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, |