Re: [PATCH 03/13] xfs: remove xfs_trans_unreserve_quota_nblks completely

[Brian Foster <bfoster@redhat.com>]

On Wed, Jan 27, 2021 at 10:01:21PM -0800, Darrick J. Wong wrote:
> From: Darrick J. Wong <djwong@kernel.org>
> 
> xfs_trans_cancel will release all the quota resources that were reserved
> on behalf of the transaction, so get rid of the explicit unreserve step.
> 
> Signed-off-by: Darrick J. Wong <djwong@kernel.org>
> ---
>  fs/xfs/xfs_bmap_util.c |    7 ++-----
>  fs/xfs/xfs_iomap.c     |    6 ++----
>  fs/xfs/xfs_quota.h     |    2 --
>  fs/xfs/xfs_reflink.c   |    5 +----
>  4 files changed, 5 insertions(+), 15 deletions(-)
> 
> 
> diff --git a/fs/xfs/xfs_bmap_util.c b/fs/xfs/xfs_bmap_util.c
> index 792809debaaa..f0a8f3377281 100644
> --- a/fs/xfs/xfs_bmap_util.c
> +++ b/fs/xfs/xfs_bmap_util.c
...
> @@ -856,9 +856,6 @@ xfs_alloc_file_space(
>  
>  	return error;
>  
> -error0:	/* unlock inode, unreserve quota blocks, cancel trans */
> -	xfs_trans_unreserve_quota_nblks(tp, ip, (long)qblocks, 0, quota_flag);
> -
>  error1:	/* Just cancel transaction */

Maybe just use 'error' here now..? Otherwise LGTM:

Reviewed-by: Brian Foster <bfoster@redhat.com>

>  	xfs_trans_cancel(tp);
>  	xfs_iunlock(ip, XFS_ILOCK_EXCL);
> diff --git a/fs/xfs/xfs_iomap.c b/fs/xfs/xfs_iomap.c
> index 514e6ae010e0..de0e371ba4dd 100644
> --- a/fs/xfs/xfs_iomap.c
> +++ b/fs/xfs/xfs_iomap.c
> @@ -253,7 +253,7 @@ xfs_iomap_write_direct(
>  	error = xfs_iext_count_may_overflow(ip, XFS_DATA_FORK,
>  			XFS_IEXT_ADD_NOSPLIT_CNT);
>  	if (error)
> -		goto out_res_cancel;
> +		goto out_trans_cancel;
>  
>  	xfs_trans_ijoin(tp, ip, 0);
>  
> @@ -265,7 +265,7 @@ xfs_iomap_write_direct(
>  	error = xfs_bmapi_write(tp, ip, offset_fsb, count_fsb, bmapi_flags, 0,
>  				imap, &nimaps);
>  	if (error)
> -		goto out_res_cancel;
> +		goto out_trans_cancel;
>  
>  	/*
>  	 * Complete the transaction
> @@ -289,8 +289,6 @@ xfs_iomap_write_direct(
>  	xfs_iunlock(ip, XFS_ILOCK_EXCL);
>  	return error;
>  
> -out_res_cancel:
> -	xfs_trans_unreserve_quota_nblks(tp, ip, (long)qblocks, 0, quota_flag);
>  out_trans_cancel:
>  	xfs_trans_cancel(tp);
>  	goto out_unlock;
> diff --git a/fs/xfs/xfs_quota.h b/fs/xfs/xfs_quota.h
> index 159d338bf161..a395dabee033 100644
> --- a/fs/xfs/xfs_quota.h
> +++ b/fs/xfs/xfs_quota.h
> @@ -164,8 +164,6 @@ xfs_quota_reserve_blkres(struct xfs_inode *ip, int64_t dblocks)
>  #define xfs_qm_unmount_quotas(mp)
>  #endif /* CONFIG_XFS_QUOTA */
>  
> -#define xfs_trans_unreserve_quota_nblks(tp, ip, nblks, ninos, flags) \
> -	xfs_trans_reserve_quota_nblks(tp, ip, -(nblks), -(ninos), flags)
>  #define xfs_trans_reserve_quota(tp, mp, ud, gd, pd, nb, ni, f) \
>  	xfs_trans_reserve_quota_bydquots(tp, mp, ud, gd, pd, nb, ni, \
>  				f | XFS_QMOPT_RES_REGBLKS)
> diff --git a/fs/xfs/xfs_reflink.c b/fs/xfs/xfs_reflink.c
> index bea64ed5a57f..15435229bc1f 100644
> --- a/fs/xfs/xfs_reflink.c
> +++ b/fs/xfs/xfs_reflink.c
> @@ -411,7 +411,7 @@ xfs_reflink_allocate_cow(
>  			XFS_BMAPI_COWFORK | XFS_BMAPI_PREALLOC, 0, cmap,
>  			&nimaps);
>  	if (error)
> -		goto out_unreserve;
> +		goto out_trans_cancel;
>  
>  	xfs_inode_set_cowblocks_tag(ip);
>  	error = xfs_trans_commit(tp);
> @@ -436,9 +436,6 @@ xfs_reflink_allocate_cow(
>  	trace_xfs_reflink_convert_cow(ip, cmap);
>  	return xfs_reflink_convert_cow_locked(ip, offset_fsb, count_fsb);
>  
> -out_unreserve:
> -	xfs_trans_unreserve_quota_nblks(tp, ip, (long)resblks, 0,
> -			XFS_QMOPT_RES_REGBLKS);
>  out_trans_cancel:
>  	xfs_trans_cancel(tp);
>  	return error;
>