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Thu, 03 Dec 2020 09:39:36 +0000 (UTC) Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id BB34AAC55; Thu, 3 Dec 2020 09:39:35 +0000 (UTC) X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" X-Inumbo-ID: 0ceb0013-3ebe-4d2a-937e-8eeecf592be7 X-Virus-Scanned: by amavisd-new at test-mx.suse.de DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1606988375; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=CSV1sDJoRkaDSHb5Z8goZsZ3J2kND8hk6DyBcbnGWKw=; b=AppEi50RLKoFlFgRlzogpJkwjjovKw0O26f2j3qJ8tKD9FL4iAcKX9qdbyDS+J7Rf/uRFu 3sluevOzl7Ivymxd2p7M67z4KMic/xtGO8L9xYP9VOaVb0ixn13K6yJyTBf8nSIaG74dii x1rsqhrH7EY3JNbcWytUD242o6PiFAI= Subject: Re: [PATCH v2 11/17] xen/hypfs: add getsize() and findentry() callbacks to hypfs_funcs To: Jan Beulich Cc: Andrew Cooper , George Dunlap , Ian Jackson , Julien Grall , Stefano Stabellini , Wei Liu , xen-devel@lists.xenproject.org References: <20201201082128.15239-1-jgross@suse.com> <20201201082128.15239-12-jgross@suse.com> From: =?UTF-8?B?SsO8cmdlbiBHcm/Dnw==?= Message-ID: Date: Thu, 3 Dec 2020 10:39:34 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.4.0 MIME-Version: 1.0 In-Reply-To: Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="JzzXWVCs0fg4lH9gtvbEMpwK42V3VbHTD" This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --JzzXWVCs0fg4lH9gtvbEMpwK42V3VbHTD Content-Type: multipart/mixed; boundary="e4g872LdFtk3sYL28g4p5I7zCh4uetgLM"; protected-headers="v1" From: =?UTF-8?B?SsO8cmdlbiBHcm/Dnw==?= To: Jan Beulich Cc: Andrew Cooper , George Dunlap , Ian Jackson , Julien Grall , Stefano Stabellini , Wei Liu , xen-devel@lists.xenproject.org Message-ID: Subject: Re: [PATCH v2 11/17] xen/hypfs: add getsize() and findentry() callbacks to hypfs_funcs References: <20201201082128.15239-1-jgross@suse.com> <20201201082128.15239-12-jgross@suse.com> In-Reply-To: --e4g872LdFtk3sYL28g4p5I7zCh4uetgLM Content-Type: multipart/mixed; boundary="------------201B8C9B7884ED2947A2D03E" Content-Language: en-US This is a multi-part message in MIME format. --------------201B8C9B7884ED2947A2D03E Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: quoted-printable On 03.12.20 09:12, Jan Beulich wrote: > On 02.12.2020 16:51, J=C3=BCrgen Gro=C3=9F wrote: >> On 02.12.20 16:42, Jan Beulich wrote: >>> On 01.12.2020 09:21, Juergen Gross wrote: >>>> Add a getsize() function pointer to struct hypfs_funcs for being abl= e >>>> to have dynamically filled entries without the need to take the hypf= s >>>> lock each time the contents are being generated. >>>> >>>> For directories add a findentry callback to the vector and modify >>>> hypfs_get_entry_rel() to use it. >>>> >>>> Signed-off-by: Juergen Gross >>> >>> Reviewed-by: Jan Beulich >>> with maybe one further small adjustment: >>> >>>> @@ -176,15 +188,41 @@ static int hypfs_get_path_user(char *buf, >>>> return 0; >>>> } >>>> =20 >>>> +struct hypfs_entry *hypfs_leaf_findentry(const struct hypfs_entry_d= ir *dir, >>>> + const char *name, >>>> + unsigned int name_len) >>>> +{ >>>> + return ERR_PTR(-ENOENT); >>>> +} >>> >>> ENOENT seems odd to me here. There looks to be no counterpart to >>> EISDIR, so maybe ENODATA, EACCES, or EPERM? >> >> Hmm, why? >> >> In case I have /a/b and I'm looking for /a/b/c ENOENT seems to be just= >> fine? >> >> Or I could add ENOTDIR. >=20 > Oh, there actually is supposed to be such an entry, but public/errno.h > is simply missing it. Yes - ENOTDIR is what I was thinking of when > saying "there looks to be no counterpart to EISDIR". Okay, I'll add ENOTDIR and set it here. 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