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bh=wuhgvuvdgwtOa+34hj22fa3rQbiJhKlyR/693I8WOHk=; h=Subject:From:To:Cc:Date:In-Reply-To:References:From; b=IJvVx6Pn4/HYFYd39/G4LBwG1IaRUt9OLlKEoHcBPbEMf6DoilzBVUKx2Mzmq09tv GZzKx375cSsjXqZs+tT1A5Nh4F+d3z3165qkeEqhv+r+BzuPwglKOL7vJG3l1AWgZv RkLcZOd937ntKK8IUOFTO8kBz+VIn3umz0xGvnBQPnyQ10Fw6kea3s4MP3eYqKUMmO D25AdgIj0ZlOsIEgE5HEC2l9CHg6LgbxOnAgTiA1/gDXsxuOJ2SZWrcv2nfrMP82Zr W5vr3NEFNx1HG5byatsrqVKVojAaJY594h10nWsOAnYzvdWO510NBhJbWU20Aq8WtI svB9MMF4prdBA== Message-ID: Subject: Re: [PATCH v2] fuse: allow FUSE drivers to declare themselves free from outside changes From: Jeff Layton To: Miklos Szeredi , Amir Goldstein Cc: Bernd Schubert , linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org Date: Tue, 02 Apr 2024 10:51:45 -0400 In-Reply-To: References: <20240402-setlease-v2-1-b098a5f9295d@kernel.org> <8a8e8c0d-7878-4289-b490-cb9bf17e56b9@fastmail.fm> Autocrypt: addr=jlayton@kernel.org; prefer-encrypt=mutual; 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 kZWuOsJdJQdmwlWC5L5ln9xgfr/4mOY38B0U= Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.50.4 (3.50.4-1.fc39) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 On Tue, 2024-04-02 at 16:38 +0200, Miklos Szeredi wrote: > On Tue, 2 Apr 2024 at 16:02, Amir Goldstein wrote: > >=20 > > On Tue, Apr 2, 2024 at 4:29=E2=80=AFPM Jeff Layton = wrote: > > >=20 > > > On Tue, 2024-04-02 at 15:23 +0200, Bernd Schubert wrote: >=20 > > > > Could you please add something like below? > > > >=20 > > > > FUSE_NO_OUTSIDE_CHANGES: No file changes through other mounts / cli= ents > > > >=20 >=20 > "through other mounts" is confusing, since one instance of the fuse > filesystem can have many mounts, and changes can be done through all > of them. The issue is if changes are spontaneous from the viewpoint > of the fuse client. >=20 I'm fine with whatever verbiage you prefer. Let me know if you need me to resend. > > >=20 > > > Definitely. I've added that in my local branch. I can either resend > > > later, or maybe Miklos can just add that if he's otherwise OK with th= is > > > patch. > >=20 > > Don't love the name but don't have any suggestions either. > >=20 > > I am wondering out loud, if we have such a mode for the fs, > > if and how should it affect caching configuration? Another thing to consider: what about fsnotify? Should notifications be allowed when this flag isn't set? >=20 > IMO it should enable all caching and override any conflicting options. > That's a separate patch, but should be done within the next cycle. > I'll look into that. >=20 Thanks! --=20 Jeff Layton