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[70.77.216.213]) by smtp.gmail.com with ESMTPSA id z19-v6sm6241722ioi.4.2018.10.18.18.48.53 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 18 Oct 2018 18:48:54 -0700 (PDT) From: Andreas Dilger Message-Id: <73E53F58-4A7C-4561-9914-2927B40AC42D@dilger.ca> Content-Type: multipart/signed; boundary="Apple-Mail=_04301E5E-5050-44E0-9024-0BAD36DEC7C5"; protocol="application/pgp-signature"; micalg=pgp-sha256 Mime-Version: 1.0 (Mac OS X Mail 10.3 \(3273\)) Subject: Re: [PATCH 3/3] statx: add STATX_ATTRIBUTES flag Date: Thu, 18 Oct 2018 19:48:51 -0600 In-Reply-To: <20181018131125.6303-3-mszeredi@redhat.com> Cc: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-api@vger.kernel.org, David Howells , Michael Kerrisk , Florian Weimer , Amir Goldstein To: Miklos Szeredi References: <20181018131125.6303-1-mszeredi@redhat.com> <20181018131125.6303-3-mszeredi@redhat.com> X-Mailer: Apple Mail (2.3273) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --Apple-Mail=_04301E5E-5050-44E0-9024-0BAD36DEC7C5 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii On Oct 18, 2018, at 7:11 AM, Miklos Szeredi wrote: >=20 > FUSE will want to know if stx_attributes is interesting or not, = because > there's a non-zero cost of retreiving it. >=20 > This is more of a "want" flag, since stx_attributes_mask already = indicates > whether we "got" stx_attributes or not. So for now we can just deal = with > this flag in the generic code. >=20 > Signed-off-by: Miklos Szeredi > Cc: David Howells > Cc: Michael Kerrisk Reviewed-by: Andreas Dilger > --- > fs/stat.c | 3 +++ > include/uapi/linux/stat.h | 1 + > samples/statx/test-statx.c | 2 +- > tools/include/uapi/linux/stat.h | 1 + > 4 files changed, 6 insertions(+), 1 deletion(-) >=20 > diff --git a/fs/stat.c b/fs/stat.c > index 8d297a279991..6bf86d57e2e3 100644 > --- a/fs/stat.c > +++ b/fs/stat.c > @@ -535,6 +535,9 @@ cp_statx(const struct kstat *stat, struct statx = __user *buffer) > tmp.stx_size =3D stat->size; > tmp.stx_blocks =3D stat->blocks; > tmp.stx_attributes_mask =3D stat->attributes_mask; > + /* Having anything in attributes_mask means attributes are = valid. */ > + if (tmp.stx_attributes_mask) > + tmp.stx_mask |=3D STATX_ATTRIBUTES; > tmp.stx_atime.tv_sec =3D stat->atime.tv_sec; > tmp.stx_atime.tv_nsec =3D stat->atime.tv_nsec; > tmp.stx_btime.tv_sec =3D stat->btime.tv_sec; > diff --git a/include/uapi/linux/stat.h b/include/uapi/linux/stat.h > index 370f09d92fa6..aef0aba5dfe7 100644 > --- a/include/uapi/linux/stat.h > +++ b/include/uapi/linux/stat.h > @@ -148,6 +148,7 @@ struct statx { > #define STATX_BLOCKS 0x00000400U /* Want/got stx_blocks = */ > #define STATX_BASIC_STATS 0x000007ffU /* The stuff in the = normal stat struct */ > #define STATX_BTIME 0x00000800U /* Want/got stx_btime */ > +#define STATX_ATTRIBUTES 0x00001000U /* Want/got = stx_attributes */ >=20 > #define STATX__RESERVED 0x80000000U /* Reserved for = future struct statx expansion */ >=20 > diff --git a/samples/statx/test-statx.c b/samples/statx/test-statx.c > index e354048dea3c..deef9a68ff68 100644 > --- a/samples/statx/test-statx.c > +++ b/samples/statx/test-statx.c > @@ -211,7 +211,7 @@ int main(int argc, char **argv) > struct statx stx; > int ret, raw =3D 0, atflag =3D AT_SYMLINK_NOFOLLOW; >=20 > - unsigned int mask =3D STATX_BASIC_STATS | STATX_BTIME; > + unsigned int mask =3D STATX_BASIC_STATS | STATX_BTIME | = STATX_ATTRIBUTES; >=20 > for (argv++; *argv; argv++) { > if (strcmp(*argv, "-F") =3D=3D 0) { > diff --git a/tools/include/uapi/linux/stat.h = b/tools/include/uapi/linux/stat.h > index 370f09d92fa6..aef0aba5dfe7 100644 > --- a/tools/include/uapi/linux/stat.h > +++ b/tools/include/uapi/linux/stat.h > @@ -148,6 +148,7 @@ struct statx { > #define STATX_BLOCKS 0x00000400U /* Want/got stx_blocks = */ > #define STATX_BASIC_STATS 0x000007ffU /* The stuff in the = normal stat struct */ > #define STATX_BTIME 0x00000800U /* Want/got stx_btime */ > +#define STATX_ATTRIBUTES 0x00001000U /* Want/got = stx_attributes */ >=20 > #define STATX__RESERVED 0x80000000U /* Reserved for = future struct statx expansion */ >=20 > -- > 2.14.3 >=20 Cheers, Andreas --Apple-Mail=_04301E5E-5050-44E0-9024-0BAD36DEC7C5 Content-Transfer-Encoding: 7bit Content-Disposition: attachment; filename=signature.asc Content-Type: application/pgp-signature; name=signature.asc Content-Description: Message signed with OpenPGP -----BEGIN PGP SIGNATURE----- Comment: GPGTools - http://gpgtools.org iQIzBAEBCAAdFiEEDb73u6ZejP5ZMprvcqXauRfMH+AFAlvJOAMACgkQcqXauRfM H+CGEA//dRmcs6WP6YXW/fyi8nTtTvN6SjwvM86nYXjJP3botYXUp2WsWHOuBLhd NyBuP/kPIc4F24A8ld2M3GyZ/qUpxrBldkRyDEpCeWMRlQiUhNTfKRGVG4Eqe2Vt mrHCFnDbPjpfnaSz73HJlYDyVOkMWHFJo8fxeB6jbsz2tUCtWn3v0qquqckKn4EY PjQZXorihHxkpqcdXQS9NxosOXBA01g9uIdJJ1FYtnooJQqZEa1dS40KB3o8gx6c Z0Y4MRpkUfospRRqChUd080/emmQ284KQAHyOGm0LItXF8hi9CIXaPprtImFsZid buaaBx447dB59izkj11FVfqk8PJx+ww939kY51TtHjx2gVSIcz9O+5gCGyxlssXI cR7rEjqCjsc85aJ00v9vFRxXbSZg3rNyPeersnm02Sp+FQLHOw7gIv33TCTCUMqS y1AR2IBAYmSxX/mgj5P+a86KyA8tmy7FkjTL6StlciXLgEqtADKmWes8ySb+PUFo UtKiQDgqoFBrynWsSWNKHgX7R7pdqLtxyDf7itM7XIUrKXuQb6R0zuKI2TifXSbT sUsMUTpPLHYDbi7+H5UfwPu4zHUquS9+bRX8EFzU2TqWbVloQIEsm+FNzTpbzX6j cmX7RwO8gBM1RVVmkgfhewwdUH6z1THpE/kpg6D4yPpVOjfNs34= =Scy1 -----END PGP SIGNATURE----- --Apple-Mail=_04301E5E-5050-44E0-9024-0BAD36DEC7C5--