From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-3.5 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 47887C2D0E8 for ; Fri, 3 Apr 2020 11:38:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 15A0F2082F for ; Fri, 3 Apr 2020 11:38:31 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="key not found in DNS" (0-bit key) header.d=szeredi.hu header.i=@szeredi.hu header.b="EIfxa4Ux" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390487AbgDCLi3 (ORCPT ); Fri, 3 Apr 2020 07:38:29 -0400 Received: from mail-ed1-f67.google.com ([209.85.208.67]:43612 "EHLO mail-ed1-f67.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728092AbgDCLi1 (ORCPT ); Fri, 3 Apr 2020 07:38:27 -0400 Received: by mail-ed1-f67.google.com with SMTP id bd14so8862366edb.10 for ; Fri, 03 Apr 2020 04:38:25 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=szeredi.hu; s=google; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=RpRtMwCbwxDI+qo+/oqeZAlCVAaxxhCpiQv9eibzNMc=; b=EIfxa4UxvoyMf6tqDArb/xS4ilQh+kOB2skcCK6Dzrg4ZyA/Tv2iU7k1wFbhTjLnVF rJ399tTN/c2J/RKLujyTC6CHnXz0STybq0DPGRTVeEpTizV+Wg0rsNsaEtJiY25Ffi44 VG6NDqGNE+TsM4HeUPlxJWLBIrDC01SHdbUi0= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=RpRtMwCbwxDI+qo+/oqeZAlCVAaxxhCpiQv9eibzNMc=; b=UpOPvRwkp6u2qZZx7oPtCN9MN1hLtKyGwjDbuJiAOsSdDwQFtTyLhNWo6duzz0Uhte nq9XZJCw8BAk5JM/8wnu+NcWlGRWFXsrnSFXSAeC5ZLLn2fLcaTDnXM9/2r4n/7zgitx JAAzYlJFqjHULffQ/bss7MHNM7+CN1cpb3mppeFKThB9y8HZogS2A+Fpx1ti65sntXRO ivw4xxT94rBH0Z0TXEcW2tgDdZpc2Q8JJiOGhkqPwoVWO6AduJoF6koDJ2vFiiImjrps C1h32nTrEXWT4nei8N+9QI/sNON3yMis/UNcDDmAaXgi5Ef117LxxBMQGNbIJSkmDTA4 zHPw== X-Gm-Message-State: AGi0PuYALTgyI018uEFbp4EAXKq88xI/hmdPqTao9Nr+LIflqMK4YQJ9 ddqRsdS5UbsOygOH/OtZtVA8LjYa4lpmiO9gudO5xw== X-Google-Smtp-Source: APiQypInp9onjVrzrdeqop63QaB3oXI53ySCB6mpalPlOF6Bwj08Y5bWK16JqM1SDQ1JL/4XLPam0X9W4ZtW9WDM6vQ= X-Received: by 2002:a17:906:fd7:: with SMTP id c23mr8078187ejk.312.1585913905026; Fri, 03 Apr 2020 04:38:25 -0700 (PDT) MIME-Version: 1.0 References: <20200330211700.g7evnuvvjenq3fzm@wittgenstein> <1445647.1585576702@warthog.procyon.org.uk> <2418286.1585691572@warthog.procyon.org.uk> <20200401144109.GA29945@gardel-login> <2590640.1585757211@warthog.procyon.org.uk> <36e45eae8ad78f7b8889d9d03b8846e78d735d28.camel@themaw.net> <27994c53034c8f769ea063a54169317c3ee62c04.camel@themaw.net> <20200403111144.GB34663@gardel-login> In-Reply-To: <20200403111144.GB34663@gardel-login> From: Miklos Szeredi Date: Fri, 3 Apr 2020 13:38:13 +0200 Message-ID: Subject: Re: Upcoming: Notifications, FS notifications and fsinfo() To: Lennart Poettering Cc: Ian Kent , David Howells , Christian Brauner , Linus Torvalds , Al Viro , dray@redhat.com, Karel Zak , Miklos Szeredi , Steven Whitehouse , Jeff Layton , andres@anarazel.de, keyrings@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, Aleksa Sarai Content-Type: multipart/mixed; boundary="000000000000f44c3b05a2615a67" Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org --000000000000f44c3b05a2615a67 Content-Type: text/plain; charset="UTF-8" On Fri, Apr 3, 2020 at 1:11 PM Lennart Poettering wrote: > > On Fr, 03.04.20 09:44, Ian Kent (raven@themaw.net) wrote: > > > > Currently the only way to find the mount id from a path is by parsing > > > /proc/self/fdinfo/$fd. It is trivial, however, to extend statx(2) to > > > return it directly from a path. Also the mount notification queue > > > that David implemented contains the mount ID of the changed mount. > > I would love to have the mount ID exposed via statx(). Here's a patch. Thanks, Miklos --000000000000f44c3b05a2615a67 Content-Type: text/x-patch; charset="US-ASCII"; name="statx-add-mount-id.patch" Content-Disposition: attachment; filename="statx-add-mount-id.patch" Content-Transfer-Encoding: base64 Content-ID: X-Attachment-Id: f_k8k45tnj0 RnJvbTogTWlrbG9zIFN6ZXJlZGkgPG1zemVyZWRpQHJlZGhhdC5jb20+ClN1YmplY3Q6IHN0YXR4 OiBhZGQgbW91bnQgSUQKClN5c3RlbWQgaXMgaGFja2luZyBhcm91bmQgdG8gZ2V0IGl0IGFuZCBp dCdzIHRyaXZpYWwgdG8gYWRkIHRvIHN0YXR4LCBzby4uLgoKU2lnbmVkLW9mZi1ieTogTWlrbG9z IFN6ZXJlZGkgPG1zemVyZWRpQHJlZGhhdC5jb20+Ci0tLQogZnMvc3RhdC5jICAgICAgICAgICAg ICAgICB8ICAgIDYgKysrKysrCiBpbmNsdWRlL2xpbnV4L3N0YXQuaCAgICAgIHwgICAgMSArCiBp bmNsdWRlL3VhcGkvbGludXgvc3RhdC5oIHwgICAgNiArKysrKy0KIDMgZmlsZXMgY2hhbmdlZCwg MTIgaW5zZXJ0aW9ucygrKSwgMSBkZWxldGlvbigtKQoKLS0tIGEvZnMvc3RhdC5jCisrKyBiL2Zz L3N0YXQuYwpAQCAtMjIsNiArMjIsNyBAQAogI2luY2x1ZGUgPGFzbS91bmlzdGQuaD4KIAogI2lu Y2x1ZGUgImludGVybmFsLmgiCisjaW5jbHVkZSAibW91bnQuaCIKIAogLyoqCiAgKiBnZW5lcmlj X2ZpbGxhdHRyIC0gRmlsbCBpbiB0aGUgYmFzaWMgYXR0cmlidXRlcyBmcm9tIHRoZSBpbm9kZSBz dHJ1Y3QKQEAgLTE5OSw2ICsyMDAsMTAgQEAgaW50IHZmc19zdGF0eChpbnQgZGZkLCBjb25zdCBj aGFyIF9fdXNlcgogCQlnb3RvIG91dDsKIAogCWVycm9yID0gdmZzX2dldGF0dHIoJnBhdGgsIHN0 YXQsIHJlcXVlc3RfbWFzaywgZmxhZ3MpOworCWlmICghZXJyb3IpIHsKKwkJc3RhdC0+bW50X2lk ID0gcmVhbF9tb3VudChwYXRoLm1udCktPm1udF9pZDsKKwkJc3RhdC0+cmVzdWx0X21hc2sgfD0g U1RBVFhfTU5UX0lEOworCX0KIAlwYXRoX3B1dCgmcGF0aCk7CiAJaWYgKHJldHJ5X2VzdGFsZShl cnJvciwgbG9va3VwX2ZsYWdzKSkgewogCQlsb29rdXBfZmxhZ3MgfD0gTE9PS1VQX1JFVkFMOwpA QCAtNTYzLDYgKzU2OCw3IEBAIGNwX3N0YXR4KGNvbnN0IHN0cnVjdCBrc3RhdCAqc3RhdCwgc3Ry dWMKIAl0bXAuc3R4X3JkZXZfbWlub3IgPSBNSU5PUihzdGF0LT5yZGV2KTsKIAl0bXAuc3R4X2Rl dl9tYWpvciA9IE1BSk9SKHN0YXQtPmRldik7CiAJdG1wLnN0eF9kZXZfbWlub3IgPSBNSU5PUihz dGF0LT5kZXYpOworCXRtcC5zdHhfbW50X2lkID0gc3RhdC0+bW50X2lkOwogCiAJcmV0dXJuIGNv cHlfdG9fdXNlcihidWZmZXIsICZ0bXAsIHNpemVvZih0bXApKSA/IC1FRkFVTFQgOiAwOwogfQot LS0gYS9pbmNsdWRlL2xpbnV4L3N0YXQuaAorKysgYi9pbmNsdWRlL2xpbnV4L3N0YXQuaApAQCAt NDcsNiArNDcsNyBAQCBzdHJ1Y3Qga3N0YXQgewogCXN0cnVjdCB0aW1lc3BlYzY0IGN0aW1lOwog CXN0cnVjdCB0aW1lc3BlYzY0IGJ0aW1lOwkJCS8qIEZpbGUgY3JlYXRpb24gdGltZSAqLwogCXU2 NAkJYmxvY2tzOworCXU2NAkJbW50X2lkOwogfTsKIAogI2VuZGlmCi0tLSBhL2luY2x1ZGUvdWFw aS9saW51eC9zdGF0LmgKKysrIGIvaW5jbHVkZS91YXBpL2xpbnV4L3N0YXQuaApAQCAtMTIzLDcg KzEyMywxMCBAQCBzdHJ1Y3Qgc3RhdHggewogCV9fdTMyCXN0eF9kZXZfbWFqb3I7CS8qIElEIG9m IGRldmljZSBjb250YWluaW5nIGZpbGUgW3VuY29uZF0gKi8KIAlfX3UzMglzdHhfZGV2X21pbm9y OwogCS8qIDB4OTAgKi8KLQlfX3U2NAlfX3NwYXJlMlsxNF07CS8qIFNwYXJlIHNwYWNlIGZvciBm dXR1cmUgZXhwYW5zaW9uICovCisJX191NjQJc3R4X21udF9pZDsKKwlfX3U2NAlfX3NwYXJlMjsK KwkvKiAweGEwICovCisJX191NjQJX19zcGFyZTNbMTJdOwkvKiBTcGFyZSBzcGFjZSBmb3IgZnV0 dXJlIGV4cGFuc2lvbiAqLwogCS8qIDB4MTAwICovCiB9OwogCkBAIC0xNDgsNiArMTUxLDcgQEAg c3RydWN0IHN0YXR4IHsKICNkZWZpbmUgU1RBVFhfQkxPQ0tTCQkweDAwMDAwNDAwVQkvKiBXYW50 L2dvdCBzdHhfYmxvY2tzICovCiAjZGVmaW5lIFNUQVRYX0JBU0lDX1NUQVRTCTB4MDAwMDA3ZmZV CS8qIFRoZSBzdHVmZiBpbiB0aGUgbm9ybWFsIHN0YXQgc3RydWN0ICovCiAjZGVmaW5lIFNUQVRY X0JUSU1FCQkweDAwMDAwODAwVQkvKiBXYW50L2dvdCBzdHhfYnRpbWUgKi8KKyNkZWZpbmUgU1RB VFhfTU5UX0lECQkweDAwMDAxMDAwVQkvKiBHb3Qgc3R4X21udF9pZCAqLwogI2RlZmluZSBTVEFU WF9BTEwJCTB4MDAwMDBmZmZVCS8qIEFsbCBjdXJyZW50bHkgc3VwcG9ydGVkIGZsYWdzICovCiAj ZGVmaW5lIFNUQVRYX19SRVNFUlZFRAkJMHg4MDAwMDAwMFUJLyogUmVzZXJ2ZWQgZm9yIGZ1dHVy ZSBzdHJ1Y3Qgc3RhdHggZXhwYW5zaW9uICovCiAK --000000000000f44c3b05a2615a67--