libceph: supported_features module parameter
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>
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@ -45,6 +45,17 @@ bool libceph_compatible(void *data)
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}
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EXPORT_SYMBOL(libceph_compatible);
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static int param_get_supported_features(char *buffer,
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const struct kernel_param *kp)
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{
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return sprintf(buffer, "0x%llx", CEPH_FEATURES_SUPPORTED_DEFAULT);
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}
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static const struct kernel_param_ops param_ops_supported_features = {
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.get = param_get_supported_features,
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};
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module_param_cb(supported_features, ¶m_ops_supported_features, NULL,
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S_IRUGO);
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/*
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* find filename portion of a path (/foo/bar/baz -> baz)
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*/
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