From nobody Wed Dec 17 17:27:35 2025 Received: from mail-pl1-f173.google.com (mail-pl1-f173.google.com [209.85.214.173]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6CB67245022 for ; Mon, 17 Mar 2025 13:58:05 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.173 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1742219886; cv=none; b=SYjN2eofuWKMGx27BU47BysiDE9OrK+riAYPiRz4AQUyfFsv4mWCqwjARBYvNungvS8+BP8qYtSMiU2MiP4V5SGcdENbF7w23es+74KVQ4Enzc2j7hGRvAgV4seKrd7sdFdOdkd1P4lFSqiIQEh220V3UGjPAqE4getuh6QLHKo= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1742219886; c=relaxed/simple; bh=jjy/ipAsVAjM570PsPj8EFg1BR0qzO1tolMoinZ9Ul8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=gyKK5i9pcHU8Ow3SzA2pqtM0TnVhBsxGaruYp+fRNqNTNA71BBg7/UHycVrRXG6Y2dmGUnM/7UGxmrf9YFRIhGOglLfgJuhEUVk5S9pbOoqy5MuofGrpiTt+0r9AlCke4xOuBu5n7Gqntbt6+Jp6S+ycqHhM/nW50Jj0A4uTBTY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=furiosa.ai; spf=none smtp.mailfrom=furiosa.ai; dkim=pass (1024-bit key) header.d=furiosa.ai header.i=@furiosa.ai header.b=KdwR8lkn; arc=none smtp.client-ip=209.85.214.173 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=furiosa.ai Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=furiosa.ai Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=furiosa.ai header.i=@furiosa.ai header.b="KdwR8lkn" Received: by mail-pl1-f173.google.com with SMTP id d9443c01a7336-223a7065ff8so38804625ad.0 for ; Mon, 17 Mar 2025 06:58:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=furiosa.ai; s=google; t=1742219884; x=1742824684; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=gA/GFNSLx9g8BrxtQW6nnUtMwtq8vRTEsCNTXthdg1I=; b=KdwR8lknBkk0y3/Ue2UtywXBWCCkbDYoO67uQcXxecd3q21/h9QkEYEg9KfeDXWOtq ciw+CRCLmFDHrCIbze5ahmRiF3m2Y4r4LPmOzGFcLSAu39To5DnwxLI2erwKqL2ve8sG IJqxdQC7mKZ3NJf4q/+Hbv+3v+TjybPDrB2+8= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1742219884; x=1742824684; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=gA/GFNSLx9g8BrxtQW6nnUtMwtq8vRTEsCNTXthdg1I=; b=H3XfeW129eLMwMVSt1Ltr41hzl+6sGf1Pzp7/hWqUC0bK8sNz8oEZjY+yhddeQGwz0 TVLI2OLuQjZpFiAJlXRx0OeQgv1YTJu5fp3fOANvteyXKM5cg9pcMG3+PVXcdIEhojkX D8t3Hz3YLIJJiDP8UoU980Zo3Q9pxbRuTt+IJGxTTF0w9Pm6/bI40l5xixPiuQDnaJlf OvrPubGLpm2lRuuWLeVTe4JD8AKP7UVRwOgB8xtjdW1z5fUucHOh/m4Sgv7X9qriB7vZ 9QC0YmD34bmuM2dHlE1jG54wz+/2gBPapcK9J9zWNu0f/UHnOTVsVtMAZXhZnt8o6SEs Fjhg== X-Forwarded-Encrypted: i=1; AJvYcCVLHubLjuC5/I6N2J/cFS3Y2/24wtaq/IsNGACfVSfOyfcLfjVagg4mcq7265mabva9zJUqaj+CT2PHTGk=@vger.kernel.org X-Gm-Message-State: AOJu0YyInwesaLXO5eH7xcWmEpss61Bzcv+aoGznl+jTsLU7XMMZ+REo RCs+MM9cbNOKItqsSBQsOYNQJ49oEfbzs1vqbJ5i86EfHXSPIXJ6wQCtkeAWN5U= X-Gm-Gg: ASbGnctLGpdUSnTYokhVs0xLg1G63PqI+2OnPisstGpcCjIdRJh/dcvvojB/bYQKxcA k//AxDqmcI6ln489Fqur+rwfPOa2TlKw72YgvM8k3XvEbSqbs+cWljU63QL95FDVi5Fu6e35k8R i+0x7P+4EjyWKwYEXqbOW9QB9V6CoOYsvG+/x/VjzzHOpEOi3yJWA2fkuWNGc+rn07OEUrr5EfT 23ea5r5CdnAVTBNGicPGpxWjswEm0ozpT1Ay/Gym5dr3DTHPVypjOA2S5Oq2TyCn93bLlikxTLr Pf9kEZlA/I2MBLq8PB2kP8Jnh7Ghl3tbY46WB4wP/tcNJDTCAudK43ZXP2tLn6h2TPWX1A383d0 7Z2caOa6ErYD5L9s= X-Google-Smtp-Source: AGHT+IFR7AcxAe0GTSDHpA3O1seZLZqT6TdAlslNuPZsXOgxqL8PZ6/n5ArYVp7pqIiRkt7+bkJSOQ== X-Received: by 2002:a17:90b:4d04:b0:2fe:baa3:b8bc with SMTP id 98e67ed59e1d1-30151d3fbb4mr12872664a91.23.1742219884680; Mon, 17 Mar 2025 06:58:04 -0700 (PDT) Received: from sidong.sidong.yang.office.furiosa.vpn ([61.83.209.48]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-30153b99508sm5993742a91.39.2025.03.17.06.58.02 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 17 Mar 2025 06:58:04 -0700 (PDT) From: Sidong Yang To: Josef Bacik , David Sterba , Jens Axboe , Pavel Begunkov Cc: linux-btrfs@vger.kernel.org, linux-kernel@vger.kernel.org, io-uring@vger.kernel.org, Sidong Yang Subject: [RFC PATCH v4 4/5] btrfs: ioctl: introduce btrfs_uring_import_iovec() Date: Mon, 17 Mar 2025 13:57:41 +0000 Message-ID: <20250317135742.4331-5-sidong.yang@furiosa.ai> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250317135742.4331-1-sidong.yang@furiosa.ai> References: <20250317135742.4331-1-sidong.yang@furiosa.ai> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" This patch introduces btrfs_uring_import_iovec(). In encoded read/write with uring cmd, it uses import_iovec without supporting fixed buffer. btrfs_using_import_iovec() could use fixed buffer if cmd flags has IORING_URING_CMD_FIXED. Signed-off-by: Sidong Yang --- fs/btrfs/ioctl.c | 32 ++++++++++++++++++++++++-------- 1 file changed, 24 insertions(+), 8 deletions(-) diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c index 6c18bad53cd3..a7b52fd99059 100644 --- a/fs/btrfs/ioctl.c +++ b/fs/btrfs/ioctl.c @@ -4802,6 +4802,28 @@ struct btrfs_uring_encoded_data { struct iov_iter iter; }; =20 +static int btrfs_uring_import_iovec(struct io_uring_cmd *cmd, + unsigned int issue_flags, int rw) +{ + struct btrfs_uring_encoded_data *data =3D + io_uring_cmd_get_async_data(cmd)->op_data; + int ret; + + if (cmd && (cmd->flags & IORING_URING_CMD_FIXED)) { + data->iov =3D NULL; + ret =3D io_uring_cmd_import_fixed_vec(cmd, data->args.iov, + data->args.iovcnt, + ITER_DEST, issue_flags, + &data->iter); + } else { + data->iov =3D data->iovstack; + ret =3D import_iovec(rw, data->args.iov, data->args.iovcnt, + ARRAY_SIZE(data->iovstack), &data->iov, + &data->iter); + } + return ret; +} + static int btrfs_uring_encoded_read(struct io_uring_cmd *cmd, unsigned int= issue_flags) { size_t copy_end_kernel =3D offsetofend(struct btrfs_ioctl_encoded_io_args= , flags); @@ -4874,10 +4896,7 @@ static int btrfs_uring_encoded_read(struct io_uring_= cmd *cmd, unsigned int issue goto out_acct; } =20 - data->iov =3D data->iovstack; - ret =3D import_iovec(ITER_DEST, data->args.iov, data->args.iovcnt, - ARRAY_SIZE(data->iovstack), &data->iov, - &data->iter); + ret =3D btrfs_uring_import_iovec(cmd, issue_flags, ITER_DEST); if (ret < 0) goto out_acct; =20 @@ -5022,10 +5041,7 @@ static int btrfs_uring_encoded_write(struct io_uring= _cmd *cmd, unsigned int issu if (data->args.len > data->args.unencoded_len - data->args.unencoded_off= set) goto out_acct; =20 - data->iov =3D data->iovstack; - ret =3D import_iovec(ITER_SOURCE, data->args.iov, data->args.iovcnt, - ARRAY_SIZE(data->iovstack), &data->iov, - &data->iter); + ret =3D btrfs_uring_import_iovec(cmd, issue_flags, ITER_SOURCE); if (ret < 0) goto out_acct; =20 --=20 2.43.0