Re: [PATCH v15 19/22] xfs: Remove unused xfs_attr_*_args

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On 2/25/21 9:58 PM, Darrick J. Wong wrote:
On Thu, Feb 18, 2021 at 09:53:45AM -0700, Allison Henderson wrote:
Remove xfs_attr_set_args, xfs_attr_remove_args, and xfs_attr_trans_roll.
These high level loops are now driven by the delayed operations code,
and can be removed.

Additionally collapse in the leaf_bp parameter of xfs_attr_set_iter
since we only have one caller that passes dac->leaf_bp

Signed-off-by: Allison Henderson <allison.henderson@xxxxxxxxxx>

Looks good to me,
Reviewed-by: Darrick J. Wong <djwong@xxxxxxxxxx>

Great, thanks!
Allison

--D

---
  fs/xfs/libxfs/xfs_attr.c        | 97 +++--------------------------------------
  fs/xfs/libxfs/xfs_attr.h        | 10 ++---
  fs/xfs/libxfs/xfs_attr_remote.c |  1 -
  fs/xfs/xfs_attr_item.c          |  8 ++--
  4 files changed, 11 insertions(+), 105 deletions(-)

diff --git a/fs/xfs/libxfs/xfs_attr.c b/fs/xfs/libxfs/xfs_attr.c
index cec861e..8b62447 100644
--- a/fs/xfs/libxfs/xfs_attr.c
+++ b/fs/xfs/libxfs/xfs_attr.c
@@ -63,8 +63,6 @@ STATIC int xfs_attr_node_hasname(xfs_da_args_t *args,
  				 struct xfs_da_state **state);
  STATIC int xfs_attr_fillstate(xfs_da_state_t *state);
  STATIC int xfs_attr_refillstate(xfs_da_state_t *state);
-int xfs_attr_set_iter(struct xfs_delattr_context *dac,
-		      struct xfs_buf **leaf_bp);
int
  xfs_inode_hasattr(
@@ -223,67 +221,13 @@ xfs_attr_is_shortform(
  		ip->i_afp->if_nextents == 0);
  }
-/*
- * Checks to see if a delayed attribute transaction should be rolled.  If so,
- * also checks for a defer finish.  Transaction is finished and rolled as
- * needed, and returns true of false if the delayed operation should continue.
- */
-STATIC int
-xfs_attr_trans_roll(
-	struct xfs_delattr_context	*dac)
-{
-	struct xfs_da_args		*args = dac->da_args;
-	int				error;
-
-	if (dac->flags & XFS_DAC_DEFER_FINISH) {
-		/*
-		 * The caller wants us to finish all the deferred ops so that we
-		 * avoid pinning the log tail with a large number of deferred
-		 * ops.
-		 */
-		dac->flags &= ~XFS_DAC_DEFER_FINISH;
-		error = xfs_defer_finish(&args->trans);
-		if (error)
-			return error;
-	} else
-		error = xfs_trans_roll_inode(&args->trans, args->dp);
-
-	return error;
-}
-
-/*
- * Set the attribute specified in @args.
- */
-int
-xfs_attr_set_args(
-	struct xfs_da_args		*args)
-{
-	struct xfs_buf			*leaf_bp = NULL;
-	int				error = 0;
-	struct xfs_delattr_context	dac = {
-		.da_args	= args,
-	};
-
-	do {
-		error = xfs_attr_set_iter(&dac, &leaf_bp);
-		if (error != -EAGAIN)
-			break;
-
-		error = xfs_attr_trans_roll(&dac);
-		if (error)
-			return error;
-	} while (true);
-
-	return error;
-}
-
  STATIC int
  xfs_attr_set_fmt(
-	struct xfs_delattr_context	*dac,
-	struct xfs_buf			**leaf_bp)
+	struct xfs_delattr_context	*dac)
  {
  	struct xfs_da_args		*args = dac->da_args;
  	struct xfs_inode		*dp = args->dp;
+	struct xfs_buf			**leaf_bp = &dac->leaf_bp;
  	int				error = 0;
/*
@@ -316,7 +260,6 @@ xfs_attr_set_fmt(
  	 * add.
  	 */
  	trace_xfs_attr_set_fmt_return(XFS_DAS_UNINIT, args->dp);
-	dac->flags |= XFS_DAC_DEFER_FINISH;
  	return -EAGAIN;
  }
@@ -329,10 +272,10 @@ xfs_attr_set_fmt(
   */
  int
  xfs_attr_set_iter(
-	struct xfs_delattr_context	*dac,
-	struct xfs_buf			**leaf_bp)
+	struct xfs_delattr_context	*dac)
  {
  	struct xfs_da_args              *args = dac->da_args;
+	struct xfs_buf			**leaf_bp = &dac->leaf_bp;
  	struct xfs_inode		*dp = args->dp;
  	struct xfs_buf			*bp = NULL;
  	struct xfs_da_state		*state = NULL;
@@ -344,7 +287,7 @@ xfs_attr_set_iter(
  	switch (dac->dela_state) {
  	case XFS_DAS_UNINIT:
  		if (xfs_attr_is_shortform(dp))
-			return xfs_attr_set_fmt(dac, leaf_bp);
+			return xfs_attr_set_fmt(dac);
/*
  		 * After a shortform to leaf conversion, we need to hold the
@@ -381,7 +324,6 @@ xfs_attr_set_iter(
  				 * be a node, so we'll fall down into the node
  				 * handling code below
  				 */
-				dac->flags |= XFS_DAC_DEFER_FINISH;
  				trace_xfs_attr_set_iter_return(
  					dac->dela_state, args->dp);
  				return -EAGAIN;
@@ -687,32 +629,6 @@ xfs_has_attr(
/*
   * Remove the attribute specified in @args.
- */
-int
-xfs_attr_remove_args(
-	struct xfs_da_args	*args)
-{
-	int				error;
-	struct xfs_delattr_context	dac = {
-		.da_args	= args,
-	};
-
-	do {
-		error = xfs_attr_remove_iter(&dac);
-		if (error != -EAGAIN)
-			break;
-
-		error = xfs_attr_trans_roll(&dac);
-		if (error)
-			return error;
-
-	} while (true);
-
-	return error;
-}
-
-/*
- * Remove the attribute specified in @args.
   *
   * This function may return -EAGAIN to signal that the transaction needs to be
   * rolled.  Callers should continue calling this function until they receive a
@@ -1297,7 +1213,6 @@ xfs_attr_node_addname(
  			 * this. dela_state is still unset by this function at
  			 * this point.
  			 */
-			dac->flags |= XFS_DAC_DEFER_FINISH;
  			trace_xfs_attr_node_addname_return(
  					dac->dela_state, args->dp);
  			return -EAGAIN;
@@ -1312,7 +1227,6 @@ xfs_attr_node_addname(
  		error = xfs_da3_split(state);
  		if (error)
  			goto out;
-		dac->flags |= XFS_DAC_DEFER_FINISH;
  	} else {
  		/*
  		 * Addition succeeded, update Btree hashvals.
@@ -1599,7 +1513,6 @@ xfs_attr_node_removename_iter(
  			if (error)
  				goto out;
- dac->flags |= XFS_DAC_DEFER_FINISH;
  			dac->dela_state = XFS_DAS_RM_SHRINK;
  			trace_xfs_attr_node_removename_iter_return(
  					dac->dela_state, args->dp);
diff --git a/fs/xfs/libxfs/xfs_attr.h b/fs/xfs/libxfs/xfs_attr.h
index 4abf02c..f82c0b1 100644
--- a/fs/xfs/libxfs/xfs_attr.h
+++ b/fs/xfs/libxfs/xfs_attr.h
@@ -393,9 +393,8 @@ enum xfs_delattr_state {
  /*
   * Defines for xfs_delattr_context.flags
   */
-#define XFS_DAC_DEFER_FINISH		0x01 /* finish the transaction */
-#define XFS_DAC_LEAF_ADDNAME_INIT	0x02 /* xfs_attr_leaf_addname init*/
-#define XFS_DAC_DELAYED_OP_INIT		0x04 /* delayed operations init*/
+#define XFS_DAC_LEAF_ADDNAME_INIT	0x01 /* xfs_attr_leaf_addname init*/
+#define XFS_DAC_DELAYED_OP_INIT		0x02 /* delayed operations init*/
/*
   * Context used for keeping track of delayed attribute operations
@@ -452,11 +451,8 @@ int xfs_inode_hasattr(struct xfs_inode *ip);
  int xfs_attr_get_ilocked(struct xfs_da_args *args);
  int xfs_attr_get(struct xfs_da_args *args);
  int xfs_attr_set(struct xfs_da_args *args);
-int xfs_attr_set_args(struct xfs_da_args *args);
-int xfs_attr_set_iter(struct xfs_delattr_context *dac,
-		      struct xfs_buf **leaf_bp);
+int xfs_attr_set_iter(struct xfs_delattr_context *dac);
  int xfs_has_attr(struct xfs_da_args *args);
-int xfs_attr_remove_args(struct xfs_da_args *args);
  int xfs_attr_remove_iter(struct xfs_delattr_context *dac);
  bool xfs_attr_namecheck(const void *name, size_t length);
  void xfs_delattr_context_init(struct xfs_delattr_context *dac,
diff --git a/fs/xfs/libxfs/xfs_attr_remote.c b/fs/xfs/libxfs/xfs_attr_remote.c
index b6554a3..78bb552 100644
--- a/fs/xfs/libxfs/xfs_attr_remote.c
+++ b/fs/xfs/libxfs/xfs_attr_remote.c
@@ -762,7 +762,6 @@ xfs_attr_rmtval_remove(
  	 * by the parent
  	 */
  	if (!done) {
-		dac->flags |= XFS_DAC_DEFER_FINISH;
  		trace_xfs_attr_rmtval_remove_return(dac->dela_state, args->dp);
  		return -EAGAIN;
  	}
diff --git a/fs/xfs/xfs_attr_item.c b/fs/xfs/xfs_attr_item.c
index 8c8f72d..13b289b 100644
--- a/fs/xfs/xfs_attr_item.c
+++ b/fs/xfs/xfs_attr_item.c
@@ -291,7 +291,6 @@ int
  xfs_trans_attr(
  	struct xfs_delattr_context	*dac,
  	struct xfs_attrd_log_item	*attrdp,
-	struct xfs_buf			**leaf_bp,
  	uint32_t			op_flags)
  {
  	struct xfs_da_args		*args = dac->da_args;
@@ -304,7 +303,7 @@ xfs_trans_attr(
  	switch (op_flags) {
  	case XFS_ATTR_OP_FLAGS_SET:
  		args->op_flags |= XFS_DA_OP_ADDNAME;
-		error = xfs_attr_set_iter(dac, leaf_bp);
+		error = xfs_attr_set_iter(dac);
  		break;
  	case XFS_ATTR_OP_FLAGS_REMOVE:
  		ASSERT(XFS_IFORK_Q(args->dp));
@@ -428,8 +427,7 @@ xfs_attr_finish_item(
  	 */
  	dac->da_args->trans = tp;
- error = xfs_trans_attr(dac, done_item, &dac->leaf_bp,
-			       attr->xattri_op_flags);
+	error = xfs_trans_attr(dac, done_item, attr->xattri_op_flags);
  	if (error != -EAGAIN)
  		kmem_free(attr);
@@ -625,7 +623,7 @@ xfs_attri_item_recover(
  	xfs_trans_ijoin(args.trans, ip, 0);
error = xfs_trans_attr(&attr.xattri_dac, done_item,
-			       &attr.xattri_dac.leaf_bp, attrp->alfi_op_flags);
+			       attrp->alfi_op_flags);
  	if (error == -EAGAIN) {
  		/*
  		 * There's more work to do, so make a new xfs_attr_item and add
--
2.7.4




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