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tcmu: Add netlink for device reconfiguration 

This gives tcmu the ability to handle events that can cause
reconfiguration, such as resize, path changes, write_cache, etc...

Signed-off-by: Bryant G. Ly <bryantly@linux.vnet.ibm.com>
Reviewed-By: Mike Christie <mchristi@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
This commit is contained in:
Bryant G. Ly 2017-06-06 09:28:49 -05:00 committed by Nicholas Bellinger
parent 9a8bb60650
commit 1068be7bd4
2 changed files with 13 additions and 0 deletions
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12
drivers/target/target_core_user.c
View File

@ -1562,6 +1562,7 @@ static ssize_t tcmu_emulate_write_cache_store(struct config_item *item,
{
struct se_dev_attrib *da = container_of(to_config_group(item),
struct se_dev_attrib, da_group);
struct tcmu_dev *udev = TCMU_DEV(da->da_dev);
int val;
int ret;
@ -1570,6 +1571,17 @@ static ssize_t tcmu_emulate_write_cache_store(struct config_item *item,
return ret;
da->emulate_write_cache = val;
/* Check if device has been configured before */
if (tcmu_dev_configured(udev)) {
ret = tcmu_netlink_event(TCMU_CMD_RECONFIG_DEVICE,
udev->uio_info.name,
udev->uio_info.uio_dev->minor);
if (ret) {
pr_err("Unable to reconfigure device\n");
return ret;
}
}
return count;
}
CONFIGFS_ATTR(tcmu_, emulate_write_cache);

1
include/uapi/linux/target_core_user.h
View File

@ -130,6 +130,7 @@ enum tcmu_genl_cmd {
TCMU_CMD_UNSPEC,
TCMU_CMD_ADDED_DEVICE,
TCMU_CMD_REMOVED_DEVICE,
TCMU_CMD_RECONFIG_DEVICE,
__TCMU_CMD_MAX,
};
#define TCMU_CMD_MAX (__TCMU_CMD_MAX - 1)