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From: Goldwyn Rodrigues <rgoldwyn@suse.de>
To: linux-btrfs@vger.kernel.org
Cc: kilobyte@angband.pl, linux-fsdevel@vger.kernel.org, jack@suse.cz,
	david@fromorbit.com, willy@infradead.org, hch@lst.de,
	darrick.wong@oracle.com, dsterba@suse.cz, nborisov@suse.com,
	linux-nvdimm@lists.01.org
Subject: [PATCH v4 00/18] btrfs dax support
Date: Mon, 29 Apr 2019 12:26:31 -0500	[thread overview]
Message-ID: <20190429172649.8288-1-rgoldwyn@suse.de> (raw)

This patch set adds support for dax on the BTRFS filesystem.
In order to support for CoW for btrfs, there were changes which had to be
made to the dax handling. The important one is copying blocks into the
same dax device before using them which is performed by iomap
type IOMAP_DAX_COW.

Snapshotting and CoW features are supported (including mmap preservation
across snapshots).

Git: https://github.com/goldwynr/linux/tree/btrfs-dax

Changes since v3:
 - Fixed memcpy bug
 - used flags for dax_insert_entry instead of bools for dax_insert_entry()

Changes since v2:
 - Created a new type IOMAP_DAX_COW as opposed to flag IOMAP_F_COW
 - CoW source address is presented in iomap.inline_data
 - Split the patches to more elaborate dax/iomap patches

Changes since v1:
 - use iomap instead of redoing everything in btrfs
 - support for mmap writeprotecting on snapshotting

 fs/btrfs/Makefile            |    1 
 fs/btrfs/ctree.h             |   38 +++++
 fs/btrfs/dax.c               |  289 +++++++++++++++++++++++++++++++++++++++++--
 fs/btrfs/disk-io.c           |    4 
 fs/btrfs/file.c              |   37 ++++-
 fs/btrfs/inode.c             |  114 ++++++++++++----
 fs/btrfs/ioctl.c             |   29 +++-
 fs/btrfs/send.c              |    4 
 fs/btrfs/super.c             |   30 ++++
 fs/dax.c                     |  183 ++++++++++++++++++++++++---
 fs/iomap.c                   |    9 -
 fs/ocfs2/file.c              |    2 
 fs/read_write.c              |   11 -
 fs/xfs/xfs_reflink.c         |    2 
 include/linux/dax.h          |   15 +-
 include/linux/fs.h           |    8 +
 include/linux/iomap.h        |    7 +
 include/trace/events/btrfs.h |   56 ++++++++
 18 files changed, 752 insertions(+), 87 deletions(-)



             reply	other threads:[~2019-04-29 17:27 UTC|newest]

Thread overview: 56+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-04-29 17:26 Goldwyn Rodrigues [this message]
2019-04-29 17:26 ` [PATCH 01/18] btrfs: create a mount option for dax Goldwyn Rodrigues
2019-05-21 18:02   ` Darrick J. Wong
2019-04-29 17:26 ` [PATCH 02/18] btrfs: Carve out btrfs_get_extent_map_write() out of btrfs_get_blocks_write() Goldwyn Rodrigues
2019-04-29 17:26 ` [PATCH 03/18] btrfs: basic dax read Goldwyn Rodrigues
2019-05-21 15:14   ` Darrick J. Wong
2019-05-22 21:50     ` Goldwyn Rodrigues
2019-04-29 17:26 ` [PATCH 04/18] dax: Introduce IOMAP_DAX_COW to CoW edges during writes Goldwyn Rodrigues
2019-05-21 16:51   ` Darrick J. Wong
2019-05-22 20:14     ` Goldwyn Rodrigues
2019-05-23  2:10       ` Dave Chinner
2019-05-23  9:05     ` Shiyang Ruan
2019-05-23 11:51       ` Goldwyn Rodrigues
2019-05-27  8:25         ` Shiyang Ruan
2019-05-28  9:17           ` Jan Kara
2019-05-29  2:01             ` Shiyang Ruan
2019-05-29  2:47               ` Dave Chinner
2019-05-29  4:02                 ` Shiyang Ruan
2019-05-29  4:07                   ` Darrick J. Wong
2019-05-29  4:46                     ` Dave Chinner
2019-05-29 13:46                       ` Jan Kara
2019-05-29 22:14                         ` Dave Chinner
2019-05-30 11:16                           ` Jan Kara
2019-05-30 22:59                             ` Dave Chinner
2019-04-29 17:26 ` [PATCH 05/18] btrfs: return whether extent is nocow or not Goldwyn Rodrigues
2019-04-29 17:26 ` [PATCH 06/18] btrfs: Rename __endio_write_update_ordered() to btrfs_update_ordered_extent() Goldwyn Rodrigues
2019-04-29 17:26 ` [PATCH 07/18] btrfs: add dax write support Goldwyn Rodrigues
2019-05-21 17:08   ` Darrick J. Wong
2019-04-29 17:26 ` [PATCH 08/18] dax: memcpy page in case of IOMAP_DAX_COW for mmap faults Goldwyn Rodrigues
2019-05-21 17:46   ` Darrick J. Wong
2019-05-22 19:11     ` Goldwyn Rodrigues
2019-05-23  4:02       ` Darrick J. Wong
2019-05-23 12:10     ` Jan Kara
2019-04-29 17:26 ` [PATCH 09/18] btrfs: Add dax specific address_space_operations Goldwyn Rodrigues
2019-04-29 17:26 ` [PATCH 10/18] dax: replace mmap entry in case of CoW Goldwyn Rodrigues
2019-05-21 17:35   ` Darrick J. Wong
2019-05-23 13:38   ` Jan Kara
2019-04-29 17:26 ` [PATCH 11/18] btrfs: add dax mmap support Goldwyn Rodrigues
2019-04-29 17:26 ` [PATCH 12/18] btrfs: allow MAP_SYNC mmap Goldwyn Rodrigues
2019-05-10 15:32   ` [PATCH for-goldwyn] btrfs: disallow MAP_SYNC outside of DAX mounts Adam Borowski
2019-05-10 15:41     ` Dan Williams
2019-05-10 15:59       ` Pankaj Gupta
2019-05-23 13:44   ` [PATCH 12/18] btrfs: allow MAP_SYNC mmap Jan Kara
2019-05-23 16:19     ` Adam Borowski
2019-04-29 17:26 ` [PATCH 13/18] fs: dedup file range to use a compare function Goldwyn Rodrigues
2019-05-21 18:17   ` Darrick J. Wong
2019-04-29 17:26 ` [PATCH 14/18] dax: memcpy before zeroing range Goldwyn Rodrigues
2019-05-21 17:27   ` Darrick J. Wong
2019-04-29 17:26 ` [PATCH 15/18] btrfs: handle dax page zeroing Goldwyn Rodrigues
2019-04-29 17:26 ` [PATCH 16/18] btrfs: Writeprotect mmap pages on snapshot Goldwyn Rodrigues
2019-05-23 14:04   ` Jan Kara
2019-05-23 15:27     ` Goldwyn Rodrigues
2019-05-23 19:07       ` Jan Kara
2019-05-23 21:22         ` Goldwyn Rodrigues
2019-04-29 17:26 ` [PATCH 17/18] btrfs: Disable dax-based defrag and send Goldwyn Rodrigues
2019-04-29 17:26 ` [PATCH 18/18] btrfs: trace functions for btrfs_iomap_begin/end Goldwyn Rodrigues

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