From: "Darrick J. Wong" <djwong@kernel.org>
To: Christoph Hellwig <hch@lst.de>
Cc: linux-xfs@vger.kernel.org
Subject: Re: [PATCH 15/20] xfs: use a union for i_cowextsize and i_flushiter
Date: Tue, 30 Mar 2021 08:22:56 -0700 [thread overview]
Message-ID: <20210330152256.GO4090233@magnolia> (raw)
In-Reply-To: <20210329053829.1851318-16-hch@lst.de>
On Mon, Mar 29, 2021 at 07:38:24AM +0200, Christoph Hellwig wrote:
> The i_cowextsize field is only used for v3 inodes, and the i_flushiter
> field is only used for v1/v2 inodes. Use a union to pack the inode a
> littler better after adding a few missing guards around their usage.
>
> Signed-off-by: Christoph Hellwig <hch@lst.de>
Looks good to me (and tests ok this time),
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
--D
> ---
> fs/xfs/libxfs/xfs_inode_buf.c | 3 ++-
> fs/xfs/xfs_inode.c | 6 ++++--
> fs/xfs/xfs_inode.h | 7 +++++--
> fs/xfs/xfs_ioctl.c | 15 +++++++++------
> 4 files changed, 20 insertions(+), 11 deletions(-)
>
> diff --git a/fs/xfs/libxfs/xfs_inode_buf.c b/fs/xfs/libxfs/xfs_inode_buf.c
> index 3c7eb01c66ace4..88ec7be551a89d 100644
> --- a/fs/xfs/libxfs/xfs_inode_buf.c
> +++ b/fs/xfs/libxfs/xfs_inode_buf.c
> @@ -193,7 +193,8 @@ xfs_inode_from_disk(
> * inode. If the inode is unused, mode is zero and we shouldn't mess
> * with the uninitialized part of it.
> */
> - ip->i_flushiter = be16_to_cpu(from->di_flushiter);
> + if (!xfs_sb_version_has_v3inode(&ip->i_mount->m_sb))
> + ip->i_flushiter = be16_to_cpu(from->di_flushiter);
> inode->i_generation = be32_to_cpu(from->di_gen);
> inode->i_mode = be16_to_cpu(from->di_mode);
> if (!inode->i_mode)
> diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c
> index 06d779c9334b80..e483c380afd1db 100644
> --- a/fs/xfs/xfs_inode.c
> +++ b/fs/xfs/xfs_inode.c
> @@ -3483,8 +3483,10 @@ xfs_iflush(
> xfs_inode_to_disk(ip, dip, iip->ili_item.li_lsn);
>
> /* Wrap, we never let the log put out DI_MAX_FLUSH */
> - if (ip->i_flushiter == DI_MAX_FLUSH)
> - ip->i_flushiter = 0;
> + if (!xfs_sb_version_has_v3inode(&mp->m_sb)) {
> + if (ip->i_flushiter == DI_MAX_FLUSH)
> + ip->i_flushiter = 0;
> + }
>
> xfs_iflush_fork(ip, dip, iip, XFS_DATA_FORK);
> if (XFS_IFORK_Q(ip))
> diff --git a/fs/xfs/xfs_inode.h b/fs/xfs/xfs_inode.h
> index abe5b44b46220a..abb8672da0ceb4 100644
> --- a/fs/xfs/xfs_inode.h
> +++ b/fs/xfs/xfs_inode.h
> @@ -58,8 +58,11 @@ typedef struct xfs_inode {
> xfs_rfsblock_t i_nblocks; /* # of direct & btree blocks */
> prid_t i_projid; /* owner's project id */
> xfs_extlen_t i_extsize; /* basic/minimum extent size */
> - xfs_extlen_t i_cowextsize; /* basic cow extent size */
> - uint16_t i_flushiter; /* incremented on flush */
> + /* cowextsize is only used for v3 inodes, flushiter for v1/2 */
> + union {
> + xfs_extlen_t i_cowextsize; /* basic cow extent size */
> + uint16_t i_flushiter; /* incremented on flush */
> + };
>
> struct xfs_icdinode i_d; /* most of ondisk inode */
>
> diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c
> index 7909e46b5c5a18..2028a4aa2bb20a 100644
> --- a/fs/xfs/xfs_ioctl.c
> +++ b/fs/xfs/xfs_ioctl.c
> @@ -1123,7 +1123,8 @@ xfs_fill_fsxattr(
> simple_fill_fsxattr(fa, xfs_ip2xflags(ip));
>
> fa->fsx_extsize = XFS_FSB_TO_B(mp, ip->i_extsize);
> - fa->fsx_cowextsize = XFS_FSB_TO_B(mp, ip->i_cowextsize);
> + if (ip->i_d.di_flags2 & XFS_DIFLAG2_COWEXTSIZE)
> + fa->fsx_cowextsize = XFS_FSB_TO_B(mp, ip->i_cowextsize);
> fa->fsx_projid = ip->i_projid;
> if (ifp && (ifp->if_flags & XFS_IFEXTENTS))
> fa->fsx_nextents = xfs_iext_count(ifp);
> @@ -1523,11 +1524,13 @@ xfs_ioctl_setattr(
> ip->i_extsize = XFS_B_TO_FSB(mp, fa->fsx_extsize);
> else
> ip->i_extsize = 0;
> - if (xfs_sb_version_has_v3inode(&mp->m_sb) &&
> - (ip->i_d.di_flags2 & XFS_DIFLAG2_COWEXTSIZE))
> - ip->i_cowextsize = XFS_B_TO_FSB(mp, fa->fsx_cowextsize);
> - else
> - ip->i_cowextsize = 0;
> +
> + if (xfs_sb_version_has_v3inode(&mp->m_sb)) {
> + if (ip->i_d.di_flags2 & XFS_DIFLAG2_COWEXTSIZE)
> + ip->i_cowextsize = XFS_B_TO_FSB(mp, fa->fsx_cowextsize);
> + else
> + ip->i_cowextsize = 0;
> + }
>
> error = xfs_trans_commit(tp);
>
> --
> 2.30.1
>
next prev parent reply other threads:[~2021-03-30 15:23 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-29 5:38 xfs inode structure cleanups v4 Christoph Hellwig
2021-03-29 5:38 ` [PATCH 01/20] xfs: split xfs_imap_to_bp Christoph Hellwig
2021-03-29 5:38 ` [PATCH 02/20] xfs: consistently initialize di_flags2 Christoph Hellwig
2021-03-29 5:38 ` [PATCH 03/20] xfs: handle crtime more carefully in xfs_bulkstat_one_int Christoph Hellwig
2021-03-29 5:38 ` [PATCH 04/20] xfs: remove the unused xfs_icdinode_has_bigtime helper Christoph Hellwig
2021-03-29 5:38 ` [PATCH 05/20] xfs: remove the di_dmevmask and di_dmstate fields from struct xfs_icdinode Christoph Hellwig
2021-03-30 15:28 ` Darrick J. Wong
2021-03-30 17:33 ` Christoph Hellwig
2021-03-29 5:38 ` [PATCH 06/20] xfs: don't clear the "dinode core" in xfs_inode_alloc Christoph Hellwig
2021-03-29 5:38 ` [PATCH 07/20] xfs: move the di_projid field to struct xfs_inode Christoph Hellwig
2021-03-30 15:20 ` Darrick J. Wong
2021-03-29 5:38 ` [PATCH 08/20] xfs: move the di_size " Christoph Hellwig
2021-03-29 5:38 ` [PATCH 09/20] xfs: move the di_nblocks " Christoph Hellwig
2021-03-29 5:38 ` [PATCH 10/20] xfs: move the di_extsize " Christoph Hellwig
2021-03-29 5:38 ` [PATCH 11/20] xfs: move the di_cowextsize " Christoph Hellwig
2021-03-29 5:38 ` [PATCH 12/20] xfs: move the di_flushiter " Christoph Hellwig
2021-03-29 5:38 ` [PATCH 13/20] xfs: cleanup xfs_fill_fsxattr Christoph Hellwig
2021-03-29 5:38 ` [PATCH 14/20] xfs: use XFS_B_TO_FSB in xfs_ioctl_setattr Christoph Hellwig
2021-03-30 15:20 ` Darrick J. Wong
2021-03-29 5:38 ` [PATCH 15/20] xfs: use a union for i_cowextsize and i_flushiter Christoph Hellwig
2021-03-30 15:22 ` Darrick J. Wong [this message]
2021-03-29 5:38 ` [PATCH 16/20] xfs: move the di_forkoff field to struct xfs_inode Christoph Hellwig
2021-03-29 5:38 ` [PATCH 17/20] xfs: move the di_flags " Christoph Hellwig
2021-03-29 5:38 ` [PATCH 18/20] xfs: move the di_flags2 " Christoph Hellwig
2021-03-29 18:14 ` Darrick J. Wong
2021-03-29 5:38 ` [PATCH 19/20] xfs: move the di_crtime " Christoph Hellwig
2021-03-29 5:38 ` [PATCH 20/20] xfs: merge _xfs_dic2xflags into xfs_ip2xflags Christoph Hellwig
2021-03-30 15:25 ` Darrick J. Wong
2021-03-30 17:31 ` Christoph Hellwig
2021-03-30 18:06 ` Darrick J. Wong
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