In article <2f29ca9a-0ae1-48d3-b3f4-1556912d4...@me.com>, Jason Thorpe <thor...@me.com> wrote: > > >> On Sep 14, 2019, at 2:52 PM, Kamil Rytarowski <n...@gmx.com> wrote: >> >> On 14.09.2019 23:34, Christos Zoulas wrote: >>> Comments? >>> >> >> Question. How does it handle symbolic/hardlinks? > >Symbolic links, of course, are simply continuations of the lookup, so >there's "nothing to see here" with a symbolic link.
If you can get a file desriptor to a symlink, it will work; I don't think that we have a way to do this now. >I looked at cache_revlookup() and it looks to me like it simply picks >the first hit it finds in the hash table for the given vnode. That is correct. >At least one platform that support this API uses "the last name the file >was looked up with", and will fall back on "whatever the underlying file >system considers to be the canonical name for the file", which is file >system-defined, if for some reason there is no entry in the name cache >(which could, for example, happen if an application is doing an >"open-by-file-id" type operation and the file has not yet been opened by >path name). It will also fail if the entry has been evicted from the cache, but that rarely happens with recently opened files. christos
