Lennart Poettering
ba8dced2a6
This replaces the "todo" set with a "todo" hash map that stores the mount flags we found. This makes an explicit call to get_mount_flags() unncessary, since we have the flags handy right-away, and lowers our work from O(n^2) to O(n). Nice! The "done" set is also improved slightly: we'll use more modern ways to allocate it, via set_ensure_consume(), and freeing-via-hash_ops. Finally, failures on submount remounts are now handled gracefully, there are just too many reasons why they might fail, given NFS, autofs, FUSE which weird access controls, where even root might lack the privs to do something. Fixes: #16156
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