From: Christoph Hellwig <hch@infradead.org>
To: Chandan Babu R <chandanrlinux@gmail.com>
Cc: linux-xfs@vger.kernel.org, darrick.wong@oracle.com, david@fromorbit.com
Subject: Re: [PATCH V2 02/10] xfs: Check for extent overflow when trivally adding a new extent
Date: Mon, 17 Aug 2020 07:53:07 +0100 [thread overview]
Message-ID: <20200817065307.GB23516@infradead.org> (raw)
In-Reply-To: <20200814080833.84760-3-chandanrlinux@gmail.com>
On Fri, Aug 14, 2020 at 01:38:25PM +0530, Chandan Babu R wrote:
> When adding a new data extent (without modifying an inode's existing
> extents) the extent count increases only by 1. This commit checks for
> extent count overflow in such cases.
>
> Signed-off-by: Chandan Babu R <chandanrlinux@gmail.com>
> ---
> fs/xfs/libxfs/xfs_bmap.c | 8 ++++++++
> fs/xfs/libxfs/xfs_inode_fork.h | 2 ++
> fs/xfs/xfs_bmap_util.c | 5 +++++
> fs/xfs/xfs_dquot.c | 8 +++++++-
> fs/xfs/xfs_iomap.c | 5 +++++
> fs/xfs/xfs_rtalloc.c | 5 +++++
> 6 files changed, 32 insertions(+), 1 deletion(-)
>
> diff --git a/fs/xfs/libxfs/xfs_bmap.c b/fs/xfs/libxfs/xfs_bmap.c
> index 9c40d5971035..e64f645415b1 100644
> --- a/fs/xfs/libxfs/xfs_bmap.c
> +++ b/fs/xfs/libxfs/xfs_bmap.c
> @@ -4527,6 +4527,14 @@ xfs_bmapi_convert_delalloc(
> return error;
>
> xfs_ilock(ip, XFS_ILOCK_EXCL);
> +
> + if (whichfork == XFS_DATA_FORK) {
Should we add COW fork special casing to xfs_iext_count_may_overflow
instead?
> + error = xfs_iext_count_may_overflow(ip, whichfork,
> + XFS_IEXT_ADD_CNT);
I find the XFS_IEXT_ADD_CNT define very confusing. An explicit 1 passed
for a counter parameter makes a lot more sense to me.
next prev parent reply other threads:[~2020-08-17 6:53 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-14 8:08 [PATCH V2 00/10] Bail out if transaction can cause extent count to overflow Chandan Babu R
2020-08-14 8:08 ` [PATCH V2 01/10] xfs: Add helper for checking per-inode extent count overflow Chandan Babu R
2020-08-17 6:51 ` Christoph Hellwig
2020-08-17 7:44 ` Chandan Babu R
2020-08-14 8:08 ` [PATCH V2 02/10] xfs: Check for extent overflow when trivally adding a new extent Chandan Babu R
2020-08-17 6:53 ` Christoph Hellwig [this message]
2020-08-17 7:44 ` Chandan Babu R
2020-08-27 8:09 ` Christoph Hellwig
2020-08-27 13:51 ` Chandan Babu R
2020-08-18 21:49 ` Dave Chinner
2020-08-18 21:57 ` Darrick J. Wong
2020-08-19 4:43 ` Chandan Babu R
2020-08-14 8:08 ` [PATCH V2 03/10] xfs: Check for extent overflow when deleting an extent Chandan Babu R
2020-08-14 8:08 ` [PATCH V2 04/10] xfs: Check for extent overflow when adding/removing xattrs Chandan Babu R
2020-08-14 8:08 ` [PATCH V2 05/10] xfs: Check for extent overflow when adding/removing dir entries Chandan Babu R
2020-08-14 8:08 ` [PATCH V2 06/10] xfs: Check for extent overflow when writing to unwritten extent Chandan Babu R
2020-08-14 8:08 ` [PATCH V2 07/10] xfs: Check for extent overflow when inserting a hole Chandan Babu R
2020-08-14 8:08 ` [PATCH V2 08/10] xfs: Check for extent overflow when moving extent from cow to data fork Chandan Babu R
2020-08-18 22:03 ` Darrick J. Wong
2020-08-19 5:04 ` Chandan Babu R
2020-08-14 8:08 ` [PATCH V2 09/10] xfs: Check for extent overflow when remapping an extent Chandan Babu R
2020-08-14 8:08 ` [PATCH V2 10/10] xfs: Check for extent overflow when swapping extents Chandan Babu R
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