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Juergen Gross
27d908e74e
Add a new xs_watch_depth() function to libxenstore allowing to limit the scope of a Xenstore watch. It can be used only in case Xenstore is supporting the XENSTORE_SERVER_FEATURE_WATCHDEPTH feature. For convenience add a xs_watch_try_depth() wrapper, which will call xs_watch_depth() if supported and xs_watch() otherwise. Cache the supported features of Xenstore in order not having to get them from Xenstore for each call of one of the new functions. While touching xs.c fix a whitespace issue there. Signed-off-by: Juergen Gross <jgross@suse.com> Reviewed-by: Jason Andryuk <jason.andryuk@amd.com>
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