diff mbox series

[08/20] xfs: add a flag to release log items on commit

Message ID 20190517073119.30178-9-hch@lst.de (mailing list archive)
State Superseded
Headers show
Series [01/20] xfs: fix a trivial comment typo in the xfs_trans_committed_bulk | expand

Commit Message

Christoph Hellwig May 17, 2019, 7:31 a.m. UTC
We have various items that are released from ->iop_comitting.  Add a
flag to just call ->iop_release from the commit path to avoid tons
of boilerplate code.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 fs/xfs/xfs_bmap_item.c     | 27 +--------------------------
 fs/xfs/xfs_extfree_item.c  | 27 +--------------------------
 fs/xfs/xfs_icreate_item.c  | 18 +-----------------
 fs/xfs/xfs_refcount_item.c | 27 +--------------------------
 fs/xfs/xfs_rmap_item.c     | 27 +--------------------------
 fs/xfs/xfs_trans.c         |  5 +++++
 fs/xfs/xfs_trans.h         |  7 +++++++
 7 files changed, 17 insertions(+), 121 deletions(-)

Comments

Brian Foster May 17, 2019, 5:50 p.m. UTC | #1
On Fri, May 17, 2019 at 09:31:07AM +0200, Christoph Hellwig wrote:
> We have various items that are released from ->iop_comitting.  Add a
> flag to just call ->iop_release from the commit path to avoid tons
> of boilerplate code.
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---

Seems reasonable, but the naming is getting a little confusing. Your
commit log refers to ->iop_committing() and the patch modifies
->iop_committed(). Both the committing and committed callbacks still
exist, while the flag is called *_RELEASE_ON_COMMIT and thus doesn't
indicate which event it actually refers to. Can we fix this up? Maybe
just call it *_RELEASE_ON_COMMITTED?

>  fs/xfs/xfs_bmap_item.c     | 27 +--------------------------
>  fs/xfs/xfs_extfree_item.c  | 27 +--------------------------
>  fs/xfs/xfs_icreate_item.c  | 18 +-----------------
>  fs/xfs/xfs_refcount_item.c | 27 +--------------------------
>  fs/xfs/xfs_rmap_item.c     | 27 +--------------------------
>  fs/xfs/xfs_trans.c         |  5 +++++
>  fs/xfs/xfs_trans.h         |  7 +++++++
>  7 files changed, 17 insertions(+), 121 deletions(-)
> 
...
> diff --git a/fs/xfs/xfs_trans.c b/fs/xfs/xfs_trans.c
> index 45a39de65997..52a8a8ff2ae9 100644
> --- a/fs/xfs/xfs_trans.c
> +++ b/fs/xfs/xfs_trans.c
> @@ -849,6 +849,11 @@ xfs_trans_committed_bulk(
>  		struct xfs_log_item	*lip = lv->lv_item;
>  		xfs_lsn_t		item_lsn;
>  
> +		if (lip->li_ops->flags & XFS_ITEM_RELEASE_ON_COMMIT) {
> +			lip->li_ops->iop_release(lip);
> +			continue;
> +		}

It might be appropriate to set the aborted flag before the callback.
Even though none of the current users happen to care, it's a more
consistent semantic with the other direct caller of ->iop_release().

Brian

> +
>  		if (aborted)
>  			set_bit(XFS_LI_ABORTED, &lip->li_flags);
>  		if (lip->li_ops->iop_committed)
> diff --git a/fs/xfs/xfs_trans.h b/fs/xfs/xfs_trans.h
> index 7bd1867613c2..a38af44344bf 100644
> --- a/fs/xfs/xfs_trans.h
> +++ b/fs/xfs/xfs_trans.h
> @@ -67,6 +67,7 @@ typedef struct xfs_log_item {
>  	{ (1 << XFS_LI_DIRTY),		"DIRTY" }
>  
>  struct xfs_item_ops {
> +	unsigned flags;
>  	void (*iop_size)(xfs_log_item_t *, int *, int *);
>  	void (*iop_format)(xfs_log_item_t *, struct xfs_log_vec *);
>  	void (*iop_pin)(xfs_log_item_t *);
> @@ -78,6 +79,12 @@ struct xfs_item_ops {
>  	void (*iop_error)(xfs_log_item_t *, xfs_buf_t *);
>  };
>  
> +/*
> + * Release the log item as soon as committed.  This is for items just logging
> + * intents that never need to be written back in place.
> + */
> +#define XFS_ITEM_RELEASE_ON_COMMIT	(1 << 0)
> +
>  void	xfs_log_item_init(struct xfs_mount *mp, struct xfs_log_item *item,
>  			  int type, const struct xfs_item_ops *ops);
>  
> -- 
> 2.20.1
>
Christoph Hellwig May 20, 2019, 6:11 a.m. UTC | #2
On Fri, May 17, 2019 at 01:50:25PM -0400, Brian Foster wrote:
> On Fri, May 17, 2019 at 09:31:07AM +0200, Christoph Hellwig wrote:
> > We have various items that are released from ->iop_comitting.  Add a
> > flag to just call ->iop_release from the commit path to avoid tons
> > of boilerplate code.
> > 
> > Signed-off-by: Christoph Hellwig <hch@lst.de>
> > ---
> 
> Seems reasonable, but the naming is getting a little confusing. Your
> commit log refers to ->iop_committing() and the patch modifies
> ->iop_committed(). Both the committing and committed callbacks still
> exist, while the flag is called *_RELEASE_ON_COMMIT and thus doesn't
> indicate which event it actually refers to. Can we fix this up? Maybe
> just call it *_RELEASE_ON_COMMITTED?

Sounds fine. 

> 
> >  fs/xfs/xfs_bmap_item.c     | 27 +--------------------------
> >  fs/xfs/xfs_extfree_item.c  | 27 +--------------------------
> >  fs/xfs/xfs_icreate_item.c  | 18 +-----------------
> >  fs/xfs/xfs_refcount_item.c | 27 +--------------------------
> >  fs/xfs/xfs_rmap_item.c     | 27 +--------------------------
> >  fs/xfs/xfs_trans.c         |  5 +++++
> >  fs/xfs/xfs_trans.h         |  7 +++++++
> >  7 files changed, 17 insertions(+), 121 deletions(-)
> > 
> ...
> > diff --git a/fs/xfs/xfs_trans.c b/fs/xfs/xfs_trans.c
> > index 45a39de65997..52a8a8ff2ae9 100644
> > --- a/fs/xfs/xfs_trans.c
> > +++ b/fs/xfs/xfs_trans.c
> > @@ -849,6 +849,11 @@ xfs_trans_committed_bulk(
> >  		struct xfs_log_item	*lip = lv->lv_item;
> >  		xfs_lsn_t		item_lsn;
> >  
> > +		if (lip->li_ops->flags & XFS_ITEM_RELEASE_ON_COMMIT) {
> > +			lip->li_ops->iop_release(lip);
> > +			continue;
> > +		}
> 
> It might be appropriate to set the aborted flag before the callback.
> Even though none of the current users happen to care, it's a more
> consistent semantic with the other direct caller of ->iop_release().

Ok.
diff mbox series

Patch

diff --git a/fs/xfs/xfs_bmap_item.c b/fs/xfs/xfs_bmap_item.c
index 56c1ab161f3b..d7ceb2d1ae82 100644
--- a/fs/xfs/xfs_bmap_item.c
+++ b/fs/xfs/xfs_bmap_item.c
@@ -208,39 +208,14 @@  xfs_bud_item_release(
 	kmem_zone_free(xfs_bud_zone, budp);
 }
 
-/*
- * When the bud item is committed to disk, all we need to do is delete our
- * reference to our partner bui item and then free ourselves. Since we're
- * freeing ourselves we must return -1 to keep the transaction code from
- * further referencing this item.
- */
-STATIC xfs_lsn_t
-xfs_bud_item_committed(
-	struct xfs_log_item	*lip,
-	xfs_lsn_t		lsn)
-{
-	struct xfs_bud_log_item	*budp = BUD_ITEM(lip);
-
-	/*
-	 * Drop the BUI reference regardless of whether the BUD has been
-	 * aborted. Once the BUD transaction is constructed, it is the sole
-	 * responsibility of the BUD to release the BUI (even if the BUI is
-	 * aborted due to log I/O error).
-	 */
-	xfs_bui_release(budp->bud_buip);
-	kmem_zone_free(xfs_bud_zone, budp);
-
-	return (xfs_lsn_t)-1;
-}
-
 /*
  * This is the ops vector shared by all bud log items.
  */
 static const struct xfs_item_ops xfs_bud_item_ops = {
+	.flags		= XFS_ITEM_RELEASE_ON_COMMIT,
 	.iop_size	= xfs_bud_item_size,
 	.iop_format	= xfs_bud_item_format,
 	.iop_release	= xfs_bud_item_release,
-	.iop_committed	= xfs_bud_item_committed,
 };
 
 /*
diff --git a/fs/xfs/xfs_extfree_item.c b/fs/xfs/xfs_extfree_item.c
index a73a3cff8502..762eb288dfe8 100644
--- a/fs/xfs/xfs_extfree_item.c
+++ b/fs/xfs/xfs_extfree_item.c
@@ -307,39 +307,14 @@  xfs_efd_item_release(
 	xfs_efd_item_free(efdp);
 }
 
-/*
- * When the efd item is committed to disk, all we need to do is delete our
- * reference to our partner efi item and then free ourselves. Since we're
- * freeing ourselves we must return -1 to keep the transaction code from further
- * referencing this item.
- */
-STATIC xfs_lsn_t
-xfs_efd_item_committed(
-	struct xfs_log_item	*lip,
-	xfs_lsn_t		lsn)
-{
-	struct xfs_efd_log_item	*efdp = EFD_ITEM(lip);
-
-	/*
-	 * Drop the EFI reference regardless of whether the EFD has been
-	 * aborted. Once the EFD transaction is constructed, it is the sole
-	 * responsibility of the EFD to release the EFI (even if the EFI is
-	 * aborted due to log I/O error).
-	 */
-	xfs_efi_release(efdp->efd_efip);
-	xfs_efd_item_free(efdp);
-
-	return (xfs_lsn_t)-1;
-}
-
 /*
  * This is the ops vector shared by all efd log items.
  */
 static const struct xfs_item_ops xfs_efd_item_ops = {
+	.flags		= XFS_ITEM_RELEASE_ON_COMMIT,
 	.iop_size	= xfs_efd_item_size,
 	.iop_format	= xfs_efd_item_format,
 	.iop_release	= xfs_efd_item_release,
-	.iop_committed	= xfs_efd_item_committed,
 };
 
 /*
diff --git a/fs/xfs/xfs_icreate_item.c b/fs/xfs/xfs_icreate_item.c
index 9aceb35dce24..eb9cb04635be 100644
--- a/fs/xfs/xfs_icreate_item.c
+++ b/fs/xfs/xfs_icreate_item.c
@@ -63,30 +63,14 @@  xfs_icreate_item_release(
 	kmem_zone_free(xfs_icreate_zone, ICR_ITEM(lip));
 }
 
-/*
- * Because we have ordered buffers being tracked in the AIL for the inode
- * creation, we don't need the create item after this. Hence we can free
- * the log item and return -1 to tell the caller we're done with the item.
- */
-STATIC xfs_lsn_t
-xfs_icreate_item_committed(
-	struct xfs_log_item	*lip,
-	xfs_lsn_t		lsn)
-{
-	struct xfs_icreate_item	*icp = ICR_ITEM(lip);
-
-	kmem_zone_free(xfs_icreate_zone, icp);
-	return (xfs_lsn_t)-1;
-}
-
 /*
  * This is the ops vector shared by all buf log items.
  */
 static const struct xfs_item_ops xfs_icreate_item_ops = {
+	.flags		= XFS_ITEM_RELEASE_ON_COMMIT,
 	.iop_size	= xfs_icreate_item_size,
 	.iop_format	= xfs_icreate_item_format,
 	.iop_release	= xfs_icreate_item_release,
-	.iop_committed	= xfs_icreate_item_committed,
 };
 
 
diff --git a/fs/xfs/xfs_refcount_item.c b/fs/xfs/xfs_refcount_item.c
index 9f8fb23dcc81..b4ab71ce39fc 100644
--- a/fs/xfs/xfs_refcount_item.c
+++ b/fs/xfs/xfs_refcount_item.c
@@ -213,39 +213,14 @@  xfs_cud_item_release(
 	kmem_zone_free(xfs_cud_zone, cudp);
 }
 
-/*
- * When the cud item is committed to disk, all we need to do is delete our
- * reference to our partner cui item and then free ourselves. Since we're
- * freeing ourselves we must return -1 to keep the transaction code from
- * further referencing this item.
- */
-STATIC xfs_lsn_t
-xfs_cud_item_committed(
-	struct xfs_log_item	*lip,
-	xfs_lsn_t		lsn)
-{
-	struct xfs_cud_log_item	*cudp = CUD_ITEM(lip);
-
-	/*
-	 * Drop the CUI reference regardless of whether the CUD has been
-	 * aborted. Once the CUD transaction is constructed, it is the sole
-	 * responsibility of the CUD to release the CUI (even if the CUI is
-	 * aborted due to log I/O error).
-	 */
-	xfs_cui_release(cudp->cud_cuip);
-	kmem_zone_free(xfs_cud_zone, cudp);
-
-	return (xfs_lsn_t)-1;
-}
-
 /*
  * This is the ops vector shared by all cud log items.
  */
 static const struct xfs_item_ops xfs_cud_item_ops = {
+	.flags		= XFS_ITEM_RELEASE_ON_COMMIT,
 	.iop_size	= xfs_cud_item_size,
 	.iop_format	= xfs_cud_item_format,
 	.iop_release	= xfs_cud_item_release,
-	.iop_committed	= xfs_cud_item_committed,
 };
 
 /*
diff --git a/fs/xfs/xfs_rmap_item.c b/fs/xfs/xfs_rmap_item.c
index e907bd169de5..1b35b3d38708 100644
--- a/fs/xfs/xfs_rmap_item.c
+++ b/fs/xfs/xfs_rmap_item.c
@@ -234,39 +234,14 @@  xfs_rud_item_release(
 	kmem_zone_free(xfs_rud_zone, rudp);
 }
 
-/*
- * When the rud item is committed to disk, all we need to do is delete our
- * reference to our partner rui item and then free ourselves. Since we're
- * freeing ourselves we must return -1 to keep the transaction code from
- * further referencing this item.
- */
-STATIC xfs_lsn_t
-xfs_rud_item_committed(
-	struct xfs_log_item	*lip,
-	xfs_lsn_t		lsn)
-{
-	struct xfs_rud_log_item	*rudp = RUD_ITEM(lip);
-
-	/*
-	 * Drop the RUI reference regardless of whether the RUD has been
-	 * aborted. Once the RUD transaction is constructed, it is the sole
-	 * responsibility of the RUD to release the RUI (even if the RUI is
-	 * aborted due to log I/O error).
-	 */
-	xfs_rui_release(rudp->rud_ruip);
-	kmem_zone_free(xfs_rud_zone, rudp);
-
-	return (xfs_lsn_t)-1;
-}
-
 /*
  * This is the ops vector shared by all rud log items.
  */
 static const struct xfs_item_ops xfs_rud_item_ops = {
+	.flags		= XFS_ITEM_RELEASE_ON_COMMIT,
 	.iop_size	= xfs_rud_item_size,
 	.iop_format	= xfs_rud_item_format,
 	.iop_release	= xfs_rud_item_release,
-	.iop_committed	= xfs_rud_item_committed,
 };
 
 /*
diff --git a/fs/xfs/xfs_trans.c b/fs/xfs/xfs_trans.c
index 45a39de65997..52a8a8ff2ae9 100644
--- a/fs/xfs/xfs_trans.c
+++ b/fs/xfs/xfs_trans.c
@@ -849,6 +849,11 @@  xfs_trans_committed_bulk(
 		struct xfs_log_item	*lip = lv->lv_item;
 		xfs_lsn_t		item_lsn;
 
+		if (lip->li_ops->flags & XFS_ITEM_RELEASE_ON_COMMIT) {
+			lip->li_ops->iop_release(lip);
+			continue;
+		}
+
 		if (aborted)
 			set_bit(XFS_LI_ABORTED, &lip->li_flags);
 		if (lip->li_ops->iop_committed)
diff --git a/fs/xfs/xfs_trans.h b/fs/xfs/xfs_trans.h
index 7bd1867613c2..a38af44344bf 100644
--- a/fs/xfs/xfs_trans.h
+++ b/fs/xfs/xfs_trans.h
@@ -67,6 +67,7 @@  typedef struct xfs_log_item {
 	{ (1 << XFS_LI_DIRTY),		"DIRTY" }
 
 struct xfs_item_ops {
+	unsigned flags;
 	void (*iop_size)(xfs_log_item_t *, int *, int *);
 	void (*iop_format)(xfs_log_item_t *, struct xfs_log_vec *);
 	void (*iop_pin)(xfs_log_item_t *);
@@ -78,6 +79,12 @@  struct xfs_item_ops {
 	void (*iop_error)(xfs_log_item_t *, xfs_buf_t *);
 };
 
+/*
+ * Release the log item as soon as committed.  This is for items just logging
+ * intents that never need to be written back in place.
+ */
+#define XFS_ITEM_RELEASE_ON_COMMIT	(1 << 0)
+
 void	xfs_log_item_init(struct xfs_mount *mp, struct xfs_log_item *item,
 			  int type, const struct xfs_item_ops *ops);