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tcmu: reconfigure netlink attr changes

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1. TCMU_ATTR_TYPE is too generic when it describes only the
reconfiguration type, so rename to TCMU_ATTR_RECONFIG_TYPE.

2. Only return the reconfig type when it is a
TCMU_CMD_RECONFIG_DEVICE command.

3. CONFIG_* type is not needed. We can pass the value along with an
ATTR to userspace, so it does not need to read sysfs/configfs.

4. Fix leak in tcmu_dev_path_store and rename to dev_config to
reflect it is more than just a path that can be changed.

6. Don't update kernel struct value if netlink sending fails.

Signed-off-by: Mike Christie <mchristi@redhat.com>
Reviewed-by: "Bryant G. Ly" <bryantly@linux.vnet.ibm.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
This commit is contained in:
Mike Christie
2017-06-12 01:34:28 -05:00
committed by Nicholas Bellinger
parent 5f572526a1
commit 2d76443e02
2 changed files with 48 additions and 37 deletions
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12
include/uapi/linux/target_core_user.h
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@@ -139,16 +139,12 @@ enum tcmu_genl_attr {
TCMU_ATTR_UNSPEC,
TCMU_ATTR_DEVICE,
TCMU_ATTR_MINOR,
TCMU_ATTR_TYPE,
TCMU_ATTR_PAD,
TCMU_ATTR_DEV_CFG,
TCMU_ATTR_DEV_SIZE,
TCMU_ATTR_WRITECACHE,
__TCMU_ATTR_MAX,
};
#define TCMU_ATTR_MAX (__TCMU_ATTR_MAX - 1)
enum tcmu_reconfig_types {
NO_RECONFIG,
CONFIG_PATH,
CONFIG_SIZE,
CONFIG_WRITECACHE,
};
#endif