Get the value of a filter attribute @param ctx the filter context @param attr the filter attribute name @param value the filter attribute value
This function fetches the value of the given attribute name and returns it via @value. Returns zero on success, negative values on failure.
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Get the value of a filter attribute @param ctx the filter context @param attr the filter attribute name @param value the filter attribute value
This function fetches the value of the given attribute name and returns it via @value. Returns zero on success, negative values on failure.