[06/10] xfs: refactor inode unlinked pointer update functions
diff mbox series

Message ID 154930318001.31814.5345699579287768446.stgit@magnolia
State New
Headers show
Series
  • xfs: incore unlinked list
Related show

Commit Message

Darrick J. Wong Feb. 4, 2019, 5:59 p.m. UTC
From: Darrick J. Wong <darrick.wong@oracle.com>

Hoist the functions that update an inode's unlinked pointer updates into
a helper.  No functional changes.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
---
 fs/xfs/xfs_inode.c |  191 +++++++++++++++++++++++++++-------------------------
 fs/xfs/xfs_trace.h |   26 +++++++
 2 files changed, 124 insertions(+), 93 deletions(-)

Comments

Christoph Hellwig Feb. 4, 2019, 8:56 p.m. UTC | #1
> +	/* Make sure the old pointer isn't garbage. */
> +	old_value = be32_to_cpu(dip->di_next_unlinked);
> +	if (old_value != NULLAGINO && !xfs_verify_agino(mp, agno, old_value)) {

Couldn't this use xfs_verify_agino_or_null?

Otherwise looks fine:

Reviewed-by: Christoph Hellwig <hch@lst.de>
Darrick J. Wong Feb. 4, 2019, 9:49 p.m. UTC | #2
On Mon, Feb 04, 2019 at 12:56:28PM -0800, Christoph Hellwig wrote:
> > +	/* Make sure the old pointer isn't garbage. */
> > +	old_value = be32_to_cpu(dip->di_next_unlinked);
> > +	if (old_value != NULLAGINO && !xfs_verify_agino(mp, agno, old_value)) {
> 
> Couldn't this use xfs_verify_agino_or_null?

Oops, missed that.  Will fix.

--D

> Otherwise looks fine:
> 
> Reviewed-by: Christoph Hellwig <hch@lst.de>
Brian Foster Feb. 5, 2019, 2:23 p.m. UTC | #3
On Mon, Feb 04, 2019 at 09:59:40AM -0800, Darrick J. Wong wrote:
> From: Darrick J. Wong <darrick.wong@oracle.com>
> 
> Hoist the functions that update an inode's unlinked pointer updates into
> a helper.  No functional changes.
> 
> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
> ---

Looks fine modulo Christoph's comment:

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

>  fs/xfs/xfs_inode.c |  191 +++++++++++++++++++++++++++-------------------------
>  fs/xfs/xfs_trace.h |   26 +++++++
>  2 files changed, 124 insertions(+), 93 deletions(-)
> 
> 
> diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c
> index 9c17ae95b18f..f23f13f0f2e6 100644
> --- a/fs/xfs/xfs_inode.c
> +++ b/fs/xfs/xfs_inode.c
> @@ -1917,6 +1917,85 @@ xfs_iunlink_update_bucket(
>  	return 0;
>  }
>  
> +/* Set an on-disk inode's next_unlinked pointer. */
> +STATIC void
> +xfs_iunlink_update_dinode(
> +	struct xfs_trans	*tp,
> +	xfs_agnumber_t		agno,
> +	struct xfs_buf		*ibp,
> +	struct xfs_dinode	*dip,
> +	struct xfs_imap		*imap,
> +	xfs_ino_t		ino,
> +	xfs_agino_t		next_agino)
> +{
> +	struct xfs_mount	*mp = tp->t_mountp;
> +	int			offset;
> +
> +	ASSERT(xfs_verify_agino_or_null(mp, agno, next_agino));
> +
> +	trace_xfs_iunlink_update_dinode(mp, agno, XFS_INO_TO_AGINO(mp, ino),
> +			be32_to_cpu(dip->di_next_unlinked), next_agino);
> +
> +	dip->di_next_unlinked = cpu_to_be32(next_agino);
> +	offset = imap->im_boffset +
> +			offsetof(struct xfs_dinode, di_next_unlinked);
> +
> +	/* need to recalc the inode CRC if appropriate */
> +	xfs_dinode_calc_crc(mp, dip);
> +	xfs_trans_inode_buf(tp, ibp);
> +	xfs_trans_log_buf(tp, ibp, offset, offset + sizeof(xfs_agino_t) - 1);
> +	xfs_inobp_check(mp, ibp);
> +}
> +
> +/* Set an in-core inode's unlinked pointer and return the old value. */
> +STATIC int
> +xfs_iunlink_update_inode(
> +	struct xfs_trans	*tp,
> +	struct xfs_inode	*ip,
> +	xfs_agnumber_t		agno,
> +	xfs_agino_t		next_agino,
> +	xfs_agino_t		*old_next_agino)
> +{
> +	struct xfs_mount	*mp = tp->t_mountp;
> +	struct xfs_dinode	*dip;
> +	struct xfs_buf		*ibp;
> +	xfs_agino_t		old_value;
> +	int			error;
> +
> +	ASSERT(xfs_verify_agino_or_null(mp, agno, next_agino));
> +
> +	error = xfs_imap_to_bp(mp, tp, &ip->i_imap, &dip, &ibp, 0, 0);
> +	if (error)
> +		return error;
> +
> +	/* Make sure the old pointer isn't garbage. */
> +	old_value = be32_to_cpu(dip->di_next_unlinked);
> +	if (old_value != NULLAGINO && !xfs_verify_agino(mp, agno, old_value)) {
> +		error = -EFSCORRUPTED;
> +		goto out;
> +	}
> +
> +	/*
> +	 * Since we're updating a linked list, we should never find that the
> +	 * current pointer is the same as the new value, unless we're
> +	 * terminating the list.
> +	 */
> +	*old_next_agino = old_value;
> +	if (old_value == next_agino) {
> +		if (next_agino != NULLAGINO)
> +			error = -EFSCORRUPTED;
> +		goto out;
> +	}
> +
> +	/* Ok, update the new pointer. */
> +	xfs_iunlink_update_dinode(tp, agno, ibp, dip, &ip->i_imap, ip->i_ino,
> +			next_agino);
> +	return 0;
> +out:
> +	xfs_trans_brelse(tp, ibp);
> +	return error;
> +}
> +
>  /*
>   * This is called when the inode's link count goes to 0 or we are creating a
>   * tmpfile via O_TMPFILE. In the case of a tmpfile, @ignore_linkcount will be
> @@ -1934,15 +2013,12 @@ xfs_iunlink(
>  {
>  	struct xfs_mount	*mp = tp->t_mountp;
>  	struct xfs_agi		*agi;
> -	struct xfs_dinode	*dip;
>  	struct xfs_buf		*agibp;
> -	struct xfs_buf		*ibp;
>  	struct xfs_perag	*pag;
>  	xfs_agino_t		next_agino;
>  	xfs_agnumber_t		agno = XFS_INO_TO_AGNO(mp, ip->i_ino);
>  	xfs_agino_t		agino = XFS_INO_TO_AGINO(mp, ip->i_ino);
>  	short			bucket_index = agino % XFS_AGI_UNLINKED_BUCKETS;
> -	int			offset;
>  	int			error;
>  
>  	ASSERT(VFS_I(ip)->i_mode != 0);
> @@ -1963,33 +2039,21 @@ xfs_iunlink(
>  	if (next_agino == agino ||
>  	    !xfs_verify_agino_or_null(mp, agno, next_agino)) {
>  		error = -EFSCORRUPTED;
> -		return error;
> +		goto out;
>  	}
>  
>  	if (next_agino != NULLAGINO) {
> +		xfs_agino_t	old_agino;
> +
>  		/*
> -		 * There is already another inode in the bucket we need
> -		 * to add ourselves to.  Add us at the front of the list.
> -		 * Here we put the head pointer into our next pointer,
> -		 * and then we fall through to point the head at us.
> +		 * There is already another inode in the bucket, so point this
> +		 * inode to the current head of the list.
>  		 */
> -		error = xfs_imap_to_bp(mp, tp, &ip->i_imap, &dip, &ibp,
> -				       0, 0);
> +		error = xfs_iunlink_update_inode(tp, ip, agno, next_agino,
> +				&old_agino);
>  		if (error)
>  			goto out;
> -
> -		ASSERT(dip->di_next_unlinked == cpu_to_be32(NULLAGINO));
> -		dip->di_next_unlinked = agi->agi_unlinked[bucket_index];
> -		offset = ip->i_imap.im_boffset +
> -			offsetof(xfs_dinode_t, di_next_unlinked);
> -
> -		/* need to recalc the inode CRC if appropriate */
> -		xfs_dinode_calc_crc(mp, dip);
> -
> -		xfs_trans_inode_buf(tp, ibp);
> -		xfs_trans_log_buf(tp, ibp, offset,
> -				  (offset + sizeof(xfs_agino_t) - 1));
> -		xfs_inobp_check(mp, ibp);
> +		ASSERT(old_agino == NULLAGINO);
>  	}
>  
>  	/* Point the head of the list to point to this inode. */
> @@ -2012,9 +2076,7 @@ xfs_iunlink_remove(
>  {
>  	struct xfs_mount	*mp = tp->t_mountp;
>  	struct xfs_agi		*agi;
> -	struct xfs_dinode	*dip;
>  	struct xfs_buf		*agibp;
> -	struct xfs_buf		*ibp;
>  	struct xfs_buf		*last_ibp;
>  	struct xfs_dinode	*last_dip = NULL;
>  	struct xfs_perag	*pag;
> @@ -2023,8 +2085,6 @@ xfs_iunlink_remove(
>  	xfs_agino_t		agino = XFS_INO_TO_AGINO(mp, ip->i_ino);
>  	xfs_agino_t		next_agino;
>  	short			bucket_index = agino % XFS_AGI_UNLINKED_BUCKETS;
> -	int			offset;
> -	int			last_offset = 0;
>  	int			error;
>  
>  	pag = xfs_perag_get(mp, agno);
> @@ -2051,34 +2111,11 @@ xfs_iunlink_remove(
>  		/*
>  		 * We're at the head of the list.  Get the inode's on-disk
>  		 * buffer to see if there is anyone after us on the list.
> -		 * Only modify our next pointer if it is not already NULLAGINO.
> -		 * This saves us the overhead of dealing with the buffer when
> -		 * there is no need to change it.
>  		 */
> -		error = xfs_imap_to_bp(mp, tp, &ip->i_imap, &dip, &ibp,
> -				       0, 0);
> -		if (error) {
> -			xfs_warn(mp, "%s: xfs_imap_to_bp returned error %d.",
> -				__func__, error);
> +		error = xfs_iunlink_update_inode(tp, ip, agno, NULLAGINO,
> +				&next_agino);
> +		if (error)
>  			goto out;
> -		}
> -		next_agino = be32_to_cpu(dip->di_next_unlinked);
> -		ASSERT(next_agino != 0);
> -		if (next_agino != NULLAGINO) {
> -			dip->di_next_unlinked = cpu_to_be32(NULLAGINO);
> -			offset = ip->i_imap.im_boffset +
> -				offsetof(xfs_dinode_t, di_next_unlinked);
> -
> -			/* need to recalc the inode CRC if appropriate */
> -			xfs_dinode_calc_crc(mp, dip);
> -
> -			xfs_trans_inode_buf(tp, ibp);
> -			xfs_trans_log_buf(tp, ibp, offset,
> -					  (offset + sizeof(xfs_agino_t) - 1));
> -			xfs_inobp_check(mp, ibp);
> -		} else {
> -			xfs_trans_brelse(tp, ibp);
> -		}
>  
>  		/* Point the head of the list to the next unlinked inode. */
>  		error = xfs_iunlink_update_bucket(tp, agno, agibp, bucket_index,
> @@ -2086,13 +2123,13 @@ xfs_iunlink_remove(
>  		if (error)
>  			goto out;
>  	} else {
> +		struct xfs_imap	imap;
> +
>  		/*
>  		 * We need to search the list for the inode being freed.
>  		 */
>  		last_ibp = NULL;
>  		while (next_agino != agino) {
> -			struct xfs_imap	imap;
> -
>  			if (last_ibp)
>  				xfs_trans_brelse(tp, last_ibp);
>  
> @@ -2116,7 +2153,6 @@ xfs_iunlink_remove(
>  				goto out;
>  			}
>  
> -			last_offset = imap.im_boffset;
>  			next_agino = be32_to_cpu(last_dip->di_next_unlinked);
>  			if (!xfs_verify_agino(mp, agno, next_agino)) {
>  				XFS_CORRUPTION_ERROR(__func__,
> @@ -2131,45 +2167,14 @@ xfs_iunlink_remove(
>  		 * Now last_ibp points to the buffer previous to us on the
>  		 * unlinked list.  Pull us from the list.
>  		 */
> -		error = xfs_imap_to_bp(mp, tp, &ip->i_imap, &dip, &ibp,
> -				       0, 0);
> -		if (error) {
> -			xfs_warn(mp, "%s: xfs_imap_to_bp(2) returned error %d.",
> -				__func__, error);
> +		error = xfs_iunlink_update_inode(tp, ip, agno, NULLAGINO,
> +				&next_agino);
> +		if (error)
>  			goto out;
> -		}
> -		next_agino = be32_to_cpu(dip->di_next_unlinked);
> -		ASSERT(next_agino != 0);
> -		ASSERT(next_agino != agino);
> -		if (next_agino != NULLAGINO) {
> -			dip->di_next_unlinked = cpu_to_be32(NULLAGINO);
> -			offset = ip->i_imap.im_boffset +
> -				offsetof(xfs_dinode_t, di_next_unlinked);
> -
> -			/* need to recalc the inode CRC if appropriate */
> -			xfs_dinode_calc_crc(mp, dip);
> -
> -			xfs_trans_inode_buf(tp, ibp);
> -			xfs_trans_log_buf(tp, ibp, offset,
> -					  (offset + sizeof(xfs_agino_t) - 1));
> -			xfs_inobp_check(mp, ibp);
> -		} else {
> -			xfs_trans_brelse(tp, ibp);
> -		}
> -		/*
> -		 * Point the previous inode on the list to the next inode.
> -		 */
> -		last_dip->di_next_unlinked = cpu_to_be32(next_agino);
> -		ASSERT(next_agino != 0);
> -		offset = last_offset + offsetof(xfs_dinode_t, di_next_unlinked);
> -
> -		/* need to recalc the inode CRC if appropriate */
> -		xfs_dinode_calc_crc(mp, last_dip);
>  
> -		xfs_trans_inode_buf(tp, last_ibp);
> -		xfs_trans_log_buf(tp, last_ibp, offset,
> -				  (offset + sizeof(xfs_agino_t) - 1));
> -		xfs_inobp_check(mp, last_ibp);
> +		/* Point the previous inode on the list to the next inode. */
> +		xfs_iunlink_update_dinode(tp, agno, last_ibp, last_dip, &imap,
> +				next_ino, next_agino);
>  	}
>  	pag->pagi_unlinked_count--;
>  out:
> diff --git a/fs/xfs/xfs_trace.h b/fs/xfs/xfs_trace.h
> index c10478e7e49a..fbec8f0e1a9a 100644
> --- a/fs/xfs/xfs_trace.h
> +++ b/fs/xfs/xfs_trace.h
> @@ -3397,6 +3397,32 @@ TRACE_EVENT(xfs_iunlink_update_bucket,
>  		  __entry->new_ptr)
>  );
>  
> +TRACE_EVENT(xfs_iunlink_update_dinode,
> +	TP_PROTO(struct xfs_mount *mp, xfs_agnumber_t agno, xfs_agino_t agino,
> +		 xfs_agino_t old_ptr, xfs_agino_t new_ptr),
> +	TP_ARGS(mp, agno, agino, old_ptr, new_ptr),
> +	TP_STRUCT__entry(
> +		__field(dev_t, dev)
> +		__field(xfs_agnumber_t, agno)
> +		__field(xfs_agino_t, agino)
> +		__field(xfs_agino_t, old_ptr)
> +		__field(xfs_agino_t, new_ptr)
> +	),
> +	TP_fast_assign(
> +		__entry->dev = mp->m_super->s_dev;
> +		__entry->agno = agno;
> +		__entry->agino = agino;
> +		__entry->old_ptr = old_ptr;
> +		__entry->new_ptr = new_ptr;
> +	),
> +	TP_printk("dev %d:%d agno %u agino 0x%x old 0x%x new 0x%x",
> +		  MAJOR(__entry->dev), MINOR(__entry->dev),
> +		  __entry->agno,
> +		  __entry->agino,
> +		  __entry->old_ptr,
> +		  __entry->new_ptr)
> +);
> +
>  #endif /* _TRACE_XFS_H */
>  
>  #undef TRACE_INCLUDE_PATH
>

Patch
diff mbox series

diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c
index 9c17ae95b18f..f23f13f0f2e6 100644
--- a/fs/xfs/xfs_inode.c
+++ b/fs/xfs/xfs_inode.c
@@ -1917,6 +1917,85 @@  xfs_iunlink_update_bucket(
 	return 0;
 }
 
+/* Set an on-disk inode's next_unlinked pointer. */
+STATIC void
+xfs_iunlink_update_dinode(
+	struct xfs_trans	*tp,
+	xfs_agnumber_t		agno,
+	struct xfs_buf		*ibp,
+	struct xfs_dinode	*dip,
+	struct xfs_imap		*imap,
+	xfs_ino_t		ino,
+	xfs_agino_t		next_agino)
+{
+	struct xfs_mount	*mp = tp->t_mountp;
+	int			offset;
+
+	ASSERT(xfs_verify_agino_or_null(mp, agno, next_agino));
+
+	trace_xfs_iunlink_update_dinode(mp, agno, XFS_INO_TO_AGINO(mp, ino),
+			be32_to_cpu(dip->di_next_unlinked), next_agino);
+
+	dip->di_next_unlinked = cpu_to_be32(next_agino);
+	offset = imap->im_boffset +
+			offsetof(struct xfs_dinode, di_next_unlinked);
+
+	/* need to recalc the inode CRC if appropriate */
+	xfs_dinode_calc_crc(mp, dip);
+	xfs_trans_inode_buf(tp, ibp);
+	xfs_trans_log_buf(tp, ibp, offset, offset + sizeof(xfs_agino_t) - 1);
+	xfs_inobp_check(mp, ibp);
+}
+
+/* Set an in-core inode's unlinked pointer and return the old value. */
+STATIC int
+xfs_iunlink_update_inode(
+	struct xfs_trans	*tp,
+	struct xfs_inode	*ip,
+	xfs_agnumber_t		agno,
+	xfs_agino_t		next_agino,
+	xfs_agino_t		*old_next_agino)
+{
+	struct xfs_mount	*mp = tp->t_mountp;
+	struct xfs_dinode	*dip;
+	struct xfs_buf		*ibp;
+	xfs_agino_t		old_value;
+	int			error;
+
+	ASSERT(xfs_verify_agino_or_null(mp, agno, next_agino));
+
+	error = xfs_imap_to_bp(mp, tp, &ip->i_imap, &dip, &ibp, 0, 0);
+	if (error)
+		return error;
+
+	/* Make sure the old pointer isn't garbage. */
+	old_value = be32_to_cpu(dip->di_next_unlinked);
+	if (old_value != NULLAGINO && !xfs_verify_agino(mp, agno, old_value)) {
+		error = -EFSCORRUPTED;
+		goto out;
+	}
+
+	/*
+	 * Since we're updating a linked list, we should never find that the
+	 * current pointer is the same as the new value, unless we're
+	 * terminating the list.
+	 */
+	*old_next_agino = old_value;
+	if (old_value == next_agino) {
+		if (next_agino != NULLAGINO)
+			error = -EFSCORRUPTED;
+		goto out;
+	}
+
+	/* Ok, update the new pointer. */
+	xfs_iunlink_update_dinode(tp, agno, ibp, dip, &ip->i_imap, ip->i_ino,
+			next_agino);
+	return 0;
+out:
+	xfs_trans_brelse(tp, ibp);
+	return error;
+}
+
 /*
  * This is called when the inode's link count goes to 0 or we are creating a
  * tmpfile via O_TMPFILE. In the case of a tmpfile, @ignore_linkcount will be
@@ -1934,15 +2013,12 @@  xfs_iunlink(
 {
 	struct xfs_mount	*mp = tp->t_mountp;
 	struct xfs_agi		*agi;
-	struct xfs_dinode	*dip;
 	struct xfs_buf		*agibp;
-	struct xfs_buf		*ibp;
 	struct xfs_perag	*pag;
 	xfs_agino_t		next_agino;
 	xfs_agnumber_t		agno = XFS_INO_TO_AGNO(mp, ip->i_ino);
 	xfs_agino_t		agino = XFS_INO_TO_AGINO(mp, ip->i_ino);
 	short			bucket_index = agino % XFS_AGI_UNLINKED_BUCKETS;
-	int			offset;
 	int			error;
 
 	ASSERT(VFS_I(ip)->i_mode != 0);
@@ -1963,33 +2039,21 @@  xfs_iunlink(
 	if (next_agino == agino ||
 	    !xfs_verify_agino_or_null(mp, agno, next_agino)) {
 		error = -EFSCORRUPTED;
-		return error;
+		goto out;
 	}
 
 	if (next_agino != NULLAGINO) {
+		xfs_agino_t	old_agino;
+
 		/*
-		 * There is already another inode in the bucket we need
-		 * to add ourselves to.  Add us at the front of the list.
-		 * Here we put the head pointer into our next pointer,
-		 * and then we fall through to point the head at us.
+		 * There is already another inode in the bucket, so point this
+		 * inode to the current head of the list.
 		 */
-		error = xfs_imap_to_bp(mp, tp, &ip->i_imap, &dip, &ibp,
-				       0, 0);
+		error = xfs_iunlink_update_inode(tp, ip, agno, next_agino,
+				&old_agino);
 		if (error)
 			goto out;
-
-		ASSERT(dip->di_next_unlinked == cpu_to_be32(NULLAGINO));
-		dip->di_next_unlinked = agi->agi_unlinked[bucket_index];
-		offset = ip->i_imap.im_boffset +
-			offsetof(xfs_dinode_t, di_next_unlinked);
-
-		/* need to recalc the inode CRC if appropriate */
-		xfs_dinode_calc_crc(mp, dip);
-
-		xfs_trans_inode_buf(tp, ibp);
-		xfs_trans_log_buf(tp, ibp, offset,
-				  (offset + sizeof(xfs_agino_t) - 1));
-		xfs_inobp_check(mp, ibp);
+		ASSERT(old_agino == NULLAGINO);
 	}
 
 	/* Point the head of the list to point to this inode. */
@@ -2012,9 +2076,7 @@  xfs_iunlink_remove(
 {
 	struct xfs_mount	*mp = tp->t_mountp;
 	struct xfs_agi		*agi;
-	struct xfs_dinode	*dip;
 	struct xfs_buf		*agibp;
-	struct xfs_buf		*ibp;
 	struct xfs_buf		*last_ibp;
 	struct xfs_dinode	*last_dip = NULL;
 	struct xfs_perag	*pag;
@@ -2023,8 +2085,6 @@  xfs_iunlink_remove(
 	xfs_agino_t		agino = XFS_INO_TO_AGINO(mp, ip->i_ino);
 	xfs_agino_t		next_agino;
 	short			bucket_index = agino % XFS_AGI_UNLINKED_BUCKETS;
-	int			offset;
-	int			last_offset = 0;
 	int			error;
 
 	pag = xfs_perag_get(mp, agno);
@@ -2051,34 +2111,11 @@  xfs_iunlink_remove(
 		/*
 		 * We're at the head of the list.  Get the inode's on-disk
 		 * buffer to see if there is anyone after us on the list.
-		 * Only modify our next pointer if it is not already NULLAGINO.
-		 * This saves us the overhead of dealing with the buffer when
-		 * there is no need to change it.
 		 */
-		error = xfs_imap_to_bp(mp, tp, &ip->i_imap, &dip, &ibp,
-				       0, 0);
-		if (error) {
-			xfs_warn(mp, "%s: xfs_imap_to_bp returned error %d.",
-				__func__, error);
+		error = xfs_iunlink_update_inode(tp, ip, agno, NULLAGINO,
+				&next_agino);
+		if (error)
 			goto out;
-		}
-		next_agino = be32_to_cpu(dip->di_next_unlinked);
-		ASSERT(next_agino != 0);
-		if (next_agino != NULLAGINO) {
-			dip->di_next_unlinked = cpu_to_be32(NULLAGINO);
-			offset = ip->i_imap.im_boffset +
-				offsetof(xfs_dinode_t, di_next_unlinked);
-
-			/* need to recalc the inode CRC if appropriate */
-			xfs_dinode_calc_crc(mp, dip);
-
-			xfs_trans_inode_buf(tp, ibp);
-			xfs_trans_log_buf(tp, ibp, offset,
-					  (offset + sizeof(xfs_agino_t) - 1));
-			xfs_inobp_check(mp, ibp);
-		} else {
-			xfs_trans_brelse(tp, ibp);
-		}
 
 		/* Point the head of the list to the next unlinked inode. */
 		error = xfs_iunlink_update_bucket(tp, agno, agibp, bucket_index,
@@ -2086,13 +2123,13 @@  xfs_iunlink_remove(
 		if (error)
 			goto out;
 	} else {
+		struct xfs_imap	imap;
+
 		/*
 		 * We need to search the list for the inode being freed.
 		 */
 		last_ibp = NULL;
 		while (next_agino != agino) {
-			struct xfs_imap	imap;
-
 			if (last_ibp)
 				xfs_trans_brelse(tp, last_ibp);
 
@@ -2116,7 +2153,6 @@  xfs_iunlink_remove(
 				goto out;
 			}
 
-			last_offset = imap.im_boffset;
 			next_agino = be32_to_cpu(last_dip->di_next_unlinked);
 			if (!xfs_verify_agino(mp, agno, next_agino)) {
 				XFS_CORRUPTION_ERROR(__func__,
@@ -2131,45 +2167,14 @@  xfs_iunlink_remove(
 		 * Now last_ibp points to the buffer previous to us on the
 		 * unlinked list.  Pull us from the list.
 		 */
-		error = xfs_imap_to_bp(mp, tp, &ip->i_imap, &dip, &ibp,
-				       0, 0);
-		if (error) {
-			xfs_warn(mp, "%s: xfs_imap_to_bp(2) returned error %d.",
-				__func__, error);
+		error = xfs_iunlink_update_inode(tp, ip, agno, NULLAGINO,
+				&next_agino);
+		if (error)
 			goto out;
-		}
-		next_agino = be32_to_cpu(dip->di_next_unlinked);
-		ASSERT(next_agino != 0);
-		ASSERT(next_agino != agino);
-		if (next_agino != NULLAGINO) {
-			dip->di_next_unlinked = cpu_to_be32(NULLAGINO);
-			offset = ip->i_imap.im_boffset +
-				offsetof(xfs_dinode_t, di_next_unlinked);
-
-			/* need to recalc the inode CRC if appropriate */
-			xfs_dinode_calc_crc(mp, dip);
-
-			xfs_trans_inode_buf(tp, ibp);
-			xfs_trans_log_buf(tp, ibp, offset,
-					  (offset + sizeof(xfs_agino_t) - 1));
-			xfs_inobp_check(mp, ibp);
-		} else {
-			xfs_trans_brelse(tp, ibp);
-		}
-		/*
-		 * Point the previous inode on the list to the next inode.
-		 */
-		last_dip->di_next_unlinked = cpu_to_be32(next_agino);
-		ASSERT(next_agino != 0);
-		offset = last_offset + offsetof(xfs_dinode_t, di_next_unlinked);
-
-		/* need to recalc the inode CRC if appropriate */
-		xfs_dinode_calc_crc(mp, last_dip);
 
-		xfs_trans_inode_buf(tp, last_ibp);
-		xfs_trans_log_buf(tp, last_ibp, offset,
-				  (offset + sizeof(xfs_agino_t) - 1));
-		xfs_inobp_check(mp, last_ibp);
+		/* Point the previous inode on the list to the next inode. */
+		xfs_iunlink_update_dinode(tp, agno, last_ibp, last_dip, &imap,
+				next_ino, next_agino);
 	}
 	pag->pagi_unlinked_count--;
 out:
diff --git a/fs/xfs/xfs_trace.h b/fs/xfs/xfs_trace.h
index c10478e7e49a..fbec8f0e1a9a 100644
--- a/fs/xfs/xfs_trace.h
+++ b/fs/xfs/xfs_trace.h
@@ -3397,6 +3397,32 @@  TRACE_EVENT(xfs_iunlink_update_bucket,
 		  __entry->new_ptr)
 );
 
+TRACE_EVENT(xfs_iunlink_update_dinode,
+	TP_PROTO(struct xfs_mount *mp, xfs_agnumber_t agno, xfs_agino_t agino,
+		 xfs_agino_t old_ptr, xfs_agino_t new_ptr),
+	TP_ARGS(mp, agno, agino, old_ptr, new_ptr),
+	TP_STRUCT__entry(
+		__field(dev_t, dev)
+		__field(xfs_agnumber_t, agno)
+		__field(xfs_agino_t, agino)
+		__field(xfs_agino_t, old_ptr)
+		__field(xfs_agino_t, new_ptr)
+	),
+	TP_fast_assign(
+		__entry->dev = mp->m_super->s_dev;
+		__entry->agno = agno;
+		__entry->agino = agino;
+		__entry->old_ptr = old_ptr;
+		__entry->new_ptr = new_ptr;
+	),
+	TP_printk("dev %d:%d agno %u agino 0x%x old 0x%x new 0x%x",
+		  MAJOR(__entry->dev), MINOR(__entry->dev),
+		  __entry->agno,
+		  __entry->agino,
+		  __entry->old_ptr,
+		  __entry->new_ptr)
+);
+
 #endif /* _TRACE_XFS_H */
 
 #undef TRACE_INCLUDE_PATH