libceph: supported_features module parameter (d6a3408a) · Commits · 戴 / test

Add a readonly, exported to sysfs module parameter so that userspace can generate meaningful error messages. It's a bit funky, but there is no other libceph-specific place. Signed-off-by:

Ilya Dryomov <idryomov@gmail.com>

net/ceph/ceph_common.c

+11 −0

Original line number	Diff line number	Diff line
		@@ -45,6 +45,17 @@ bool libceph_compatible(void *data)
		}
		EXPORT_SYMBOL(libceph_compatible);

		static int param_get_supported_features(char *buffer,
		const struct kernel_param *kp)
		{
		return sprintf(buffer, "0x%llx", CEPH_FEATURES_SUPPORTED_DEFAULT);
		}
		static const struct kernel_param_ops param_ops_supported_features = {
		.get = param_get_supported_features,
		};
		module_param_cb(supported_features, &param_ops_supported_features, NULL,
		S_IRUGO);

		/*
		* find filename portion of a path (/foo/bar/baz -> baz)
		*/

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