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tcmu: perfom device add, del and reconfig synchronously

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This makes the device add, del reconfig operations sync. It fixes
the issue where for add and reconfig, we do not know if userspace
successfully completely the operation, so we leave invalid kernel
structs or report incorrect status for the config/reconfig operations.

Signed-off-by: Mike Christie <mchristi@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
This commit is contained in:
Mike Christie 2017-06-23 01:18:15 -05:00 • committed by Nicholas Bellinger
commit b3af66e243
2 changed files with 200 additions and 20 deletions
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7
include/uapi/linux/target_core_user.h
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@ -131,6 +131,10 @@ enum tcmu_genl_cmd {
TCMU_CMD_ADDED_DEVICE,
TCMU_CMD_REMOVED_DEVICE,
TCMU_CMD_RECONFIG_DEVICE,
TCMU_CMD_ADDED_DEVICE_DONE,
TCMU_CMD_REMOVED_DEVICE_DONE,
TCMU_CMD_RECONFIG_DEVICE_DONE,
TCMU_CMD_SET_FEATURES,
__TCMU_CMD_MAX,
};
#define TCMU_CMD_MAX (__TCMU_CMD_MAX - 1)
@ -143,6 +147,9 @@ enum tcmu_genl_attr {
TCMU_ATTR_DEV_CFG,
TCMU_ATTR_DEV_SIZE,
TCMU_ATTR_WRITECACHE,
TCMU_ATTR_CMD_STATUS,
TCMU_ATTR_DEVICE_ID,
TCMU_ATTR_SUPP_KERN_CMD_REPLY,
__TCMU_ATTR_MAX,
};
#define TCMU_ATTR_MAX (__TCMU_ATTR_MAX - 1)