From patchwork Tue Jun 13 17:15:17 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jens Axboe X-Patchwork-Id: 9784417 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id DF85A60212 for ; Tue, 13 Jun 2017 17:15:54 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id C545D2858F for ; Tue, 13 Jun 2017 17:15:54 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id BA57A286F2; Tue, 13 Jun 2017 17:15:54 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 63CF72858F for ; Tue, 13 Jun 2017 17:15:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753541AbdFMRPf (ORCPT ); Tue, 13 Jun 2017 13:15:35 -0400 Received: from mail-it0-f50.google.com ([209.85.214.50]:37491 "EHLO mail-it0-f50.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753311AbdFMRPd (ORCPT ); Tue, 13 Jun 2017 13:15:33 -0400 Received: by mail-it0-f50.google.com with SMTP id m47so41460985iti.0 for ; Tue, 13 Jun 2017 10:15:32 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel-dk.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=Rde1sAXKP/5+2WNByehMNtmVYYpxoQuJh4mRS46wXQw=; b=m53YRBq6kL8nZu1anDjnw/xKPGzRq1CCobAg6Xqg/ekA3hU6zml6A9PbivAiGk7QG9 g/7uyZ2YalXkDHhoANTZjd9etA56kn8CqUdsXtk4pjIYYRC+ydQXU8JscDgKVQWML5uH xv07tCi3crTcIuQJsVyismoYbbRQ0Z1IPjdDwjbkz6dqjrLkQIeKe8r3Q0Y5klpGJkc6 4C4XDQNHJGqXij0KOV9uhUDHGduUwIMuvEJC8nvBxIAAhcHG6pCt4WH7ZeGBSIy5IhQt dzOadvuXNrcpUcob10C7Hc9j2JctLtREHFX2CLRf6+6pK0bX2KQAnVYpNkEXO2Iw/xAJ t+ZA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=Rde1sAXKP/5+2WNByehMNtmVYYpxoQuJh4mRS46wXQw=; b=GYGDNohTBDSDWp3clJp/AOi13/YMP0MDtcV/49Sc7+Y++7q569s3ls4gVA016kg07z dqjgw1eRraPFtxtOMs43NRhwy5UajXW0qXNf9+t3BetMXgVNn1R1zY0S+H3VDaDyOpOg InHVV6vMwDAUE3hLTdXAPiWTG9rAj/zZna9YRC8TBP8uNmgvSklVKi6hDpbSQ1VsXTuz ajG3qdfiisVDN8d8g5CSyDese5QtVLeY8hJ1hrtwgAPwNyX7S6ee6uHhLyFpHqwVnwJo 3yD5qRueg9ELwgnVnTqd9P89Gu+Nx/IPRiko8XJ3s0fPPSTFDfoDK2Uif46kyeGhWFyN 4sag== X-Gm-Message-State: AKS2vOytikq6Lr5q81lBoKIQC3O6lYFr4sDjQE/8G2HgBCSERu4gfU8o 9PtYxOG0N0JNxeUnsfpgVg== X-Received: by 10.36.26.21 with SMTP id 21mr1354400iti.6.1497374132083; Tue, 13 Jun 2017 10:15:32 -0700 (PDT) Received: from localhost.localdomain ([216.160.245.98]) by smtp.gmail.com with ESMTPSA id y188sm6217526ity.9.2017.06.13.10.15.31 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Tue, 13 Jun 2017 10:15:31 -0700 (PDT) From: Jens Axboe To: linux-fsdevel@vger.kernel.org, linux-block@vger.kernel.org Cc: Jens Axboe Subject: [PATCH 05/11] fs: add support for allowing applications to pass in write life time hints Date: Tue, 13 Jun 2017 11:15:17 -0600 Message-Id: <1497374123-15286-6-git-send-email-axboe@kernel.dk> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1497374123-15286-1-git-send-email-axboe@kernel.dk> References: <1497374123-15286-1-git-send-email-axboe@kernel.dk> Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Add four flags for the pwritev2(2) system call, allowing an application to give the kernel a hint about what on-media life times can be expected from a given write. The intent is for these values to be relative to each other, no absolute meaning should be attached to these flag names. Define IOCB flags to carry this information over, and finally transform them into the block defined stream values. Signed-off-by: Jens Axboe --- fs/read_write.c | 17 ++++++++++++++++- include/linux/fs.h | 18 ++++++++++++++++++ include/uapi/linux/fs.h | 4 ++++ 3 files changed, 38 insertions(+), 1 deletion(-) diff --git a/fs/read_write.c b/fs/read_write.c index 47c1d4484df9..1734728aa48b 100644 --- a/fs/read_write.c +++ b/fs/read_write.c @@ -678,7 +678,9 @@ static ssize_t do_iter_readv_writev(struct file *filp, struct iov_iter *iter, struct kiocb kiocb; ssize_t ret; - if (flags & ~(RWF_HIPRI | RWF_DSYNC | RWF_SYNC)) + if (flags & ~(RWF_HIPRI | RWF_DSYNC | RWF_SYNC | RWF_WRITE_LIFE_SHORT | + RWF_WRITE_LIFE_MEDIUM | RWF_WRITE_LIFE_LONG | + RWF_WRITE_LIFE_EXTREME)) return -EOPNOTSUPP; init_sync_kiocb(&kiocb, filp); @@ -688,6 +690,19 @@ static ssize_t do_iter_readv_writev(struct file *filp, struct iov_iter *iter, kiocb.ki_flags |= IOCB_DSYNC; if (flags & RWF_SYNC) kiocb.ki_flags |= (IOCB_DSYNC | IOCB_SYNC); + if (flags & RWF_WRITE_LIFE_SHORT) { + kiocb.ki_flags |= IOCB_WRITE_LIFE_SHORT; + file_inode(filp)->i_stream = WRITE_LIFE_SHORT; + } else if (flags & RWF_WRITE_LIFE_MEDIUM) { + kiocb.ki_flags |= IOCB_WRITE_LIFE_MEDIUM; + file_inode(filp)->i_stream = WRITE_LIFE_MEDIUM; + } else if (flags & RWF_WRITE_LIFE_LONG) { + kiocb.ki_flags |= IOCB_WRITE_LIFE_LONG; + file_inode(filp)->i_stream = WRITE_LIFE_LONG; + } else if (flags & RWF_WRITE_LIFE_EXTREME) { + kiocb.ki_flags |= IOCB_WRITE_LIFE_EXTREME; + file_inode(filp)->i_stream = WRITE_LIFE_EXTREME; + } kiocb.ki_pos = *ppos; if (type == READ) diff --git a/include/linux/fs.h b/include/linux/fs.h index bb8c246eeda8..7f542e0b0e17 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -269,6 +269,10 @@ struct writeback_control; #define IOCB_DSYNC (1 << 4) #define IOCB_SYNC (1 << 5) #define IOCB_WRITE (1 << 6) +#define IOCB_WRITE_LIFE_SHORT (1 << 7) +#define IOCB_WRITE_LIFE_MEDIUM (1 << 8) +#define IOCB_WRITE_LIFE_LONG (1 << 9) +#define IOCB_WRITE_LIFE_EXTREME (1 << 10) struct kiocb { struct file *ki_filp; @@ -293,6 +297,20 @@ static inline void init_sync_kiocb(struct kiocb *kiocb, struct file *filp) }; } +static inline int iocb_streamid(const struct kiocb *iocb) +{ + if (iocb->ki_flags & IOCB_WRITE_LIFE_SHORT) + return WRITE_LIFE_SHORT; + else if (iocb->ki_flags & IOCB_WRITE_LIFE_MEDIUM) + return WRITE_LIFE_MEDIUM; + else if (iocb->ki_flags & IOCB_WRITE_LIFE_LONG) + return WRITE_LIFE_LONG; + else if (iocb->ki_flags & IOCB_WRITE_LIFE_EXTREME) + return WRITE_LIFE_EXTREME; + + return WRITE_LIFE_UNKNOWN; +} + /* * "descriptor" for what we're up to with a read. * This allows us to use the same read code yet diff --git a/include/uapi/linux/fs.h b/include/uapi/linux/fs.h index 24e61a54feaa..34145b29657e 100644 --- a/include/uapi/linux/fs.h +++ b/include/uapi/linux/fs.h @@ -360,5 +360,9 @@ struct fscrypt_key { #define RWF_HIPRI 0x00000001 /* high priority request, poll if possible */ #define RWF_DSYNC 0x00000002 /* per-IO O_DSYNC */ #define RWF_SYNC 0x00000004 /* per-IO O_SYNC */ +#define RWF_WRITE_LIFE_SHORT 0x00000008 /* short life time write */ +#define RWF_WRITE_LIFE_MEDIUM 0x00000010 /* medium life time write */ +#define RWF_WRITE_LIFE_LONG 0x00000020 /* long life time write */ +#define RWF_WRITE_LIFE_EXTREME 0x00000040 /* extremely long life time write */ #endif /* _UAPI_LINUX_FS_H */