From c5b4ac39a4cb6a9a79025106a471f0738b3cb525 Mon Sep 17 00:00:00 2001
From: Christoph Hellwig <hch@lst.de>
Date: Tue, 13 May 2014 16:34:14 +1000
Subject: [PATCH 1/5] xfs: fold xfs_attr_set_int into xfs_attr_set

Plus various minor style fixes to the new xfs_attr_set.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
---
 fs/xfs/xfs_attr.c | 110 +++++++++++++++++++---------------------------
 1 file changed, 44 insertions(+), 66 deletions(-)

diff --git a/fs/xfs/xfs_attr.c b/fs/xfs/xfs_attr.c
index 01b6a0102fbd..eb3ae8fcaf74 100644
--- a/fs/xfs/xfs_attr.c
+++ b/fs/xfs/xfs_attr.c
@@ -221,26 +221,32 @@ xfs_attr_calc_size(
 	return nblks;
 }
 
-STATIC int
-xfs_attr_set_int(
-	struct xfs_inode *dp,
-	struct xfs_name	*name,
-	unsigned char	*value,
-	int		valuelen,
-	int		flags)
+int
+xfs_attr_set(
+	struct xfs_inode	*dp,
+	const unsigned char	*name,
+	unsigned char		*value,
+	int			valuelen,
+	int			flags)
 {
-	xfs_da_args_t		args;
-	xfs_fsblock_t		firstblock;
-	xfs_bmap_free_t		flist;
-	int			error, err2, committed;
 	struct xfs_mount	*mp = dp->i_mount;
+	struct xfs_da_args	args;
+	struct xfs_bmap_free	flist;
 	struct xfs_trans_res	tres;
+	struct xfs_name		xname;
+	xfs_fsblock_t		firstblock;
 	int			rsvd = (flags & ATTR_ROOT) != 0;
-	int			local;
+	int			error, err2, committed, local;
+
+	XFS_STATS_INC(xs_attr_set);
+
+	if (XFS_FORCED_SHUTDOWN(dp->i_mount))
+		return EIO;
+
+	error = xfs_attr_name_to_xname(&xname, name);
+	if (error)
+		return error;
 
-	/*
-	 * Attach the dquots to the inode.
-	 */
 	error = xfs_qm_dqattach(dp, 0);
 	if (error)
 		return error;
@@ -251,18 +257,16 @@ xfs_attr_set_int(
 	 */
 	if (XFS_IFORK_Q(dp) == 0) {
 		int sf_size = sizeof(xfs_attr_sf_hdr_t) +
-			      XFS_ATTR_SF_ENTSIZE_BYNAME(name->len, valuelen);
+			      XFS_ATTR_SF_ENTSIZE_BYNAME(xname.len, valuelen);
 
-		if ((error = xfs_bmap_add_attrfork(dp, sf_size, rsvd)))
-			return(error);
+		error = xfs_bmap_add_attrfork(dp, sf_size, rsvd);
+		if (error)
+			return error;
 	}
 
-	/*
-	 * Fill in the arg structure for this request.
-	 */
-	memset((char *)&args, 0, sizeof(args));
-	args.name = name->name;
-	args.namelen = name->len;
+	memset(&args, 0, sizeof(args));
+	args.name = xname.name;
+	args.namelen = xname.len;
 	args.value = value;
 	args.valuelen = valuelen;
 	args.flags = flags;
@@ -274,7 +278,7 @@ xfs_attr_set_int(
 	args.op_flags = XFS_DA_OP_ADDNAME | XFS_DA_OP_OKNOENT;
 
 	/* Size is now blocks for attribute data */
-	args.total = xfs_attr_calc_size(dp, name->len, valuelen, &local);
+	args.total = xfs_attr_calc_size(dp, xname.len, valuelen, &local);
 
 	/*
 	 * Start our first transaction of the day.
@@ -303,7 +307,7 @@ xfs_attr_set_int(
 	error = xfs_trans_reserve(args.trans, &tres, args.total, 0);
 	if (error) {
 		xfs_trans_cancel(args.trans, 0);
-		return(error);
+		return error;
 	}
 	xfs_ilock(dp, XFS_ILOCK_EXCL);
 
@@ -313,7 +317,7 @@ xfs_attr_set_int(
 	if (error) {
 		xfs_iunlock(dp, XFS_ILOCK_EXCL);
 		xfs_trans_cancel(args.trans, XFS_TRANS_RELEASE_LOG_RES);
-		return (error);
+		return error;
 	}
 
 	xfs_trans_ijoin(args.trans, dp, 0);
@@ -322,9 +326,9 @@ xfs_attr_set_int(
 	 * If the attribute list is non-existent or a shortform list,
 	 * upgrade it to a single-leaf-block attribute list.
 	 */
-	if ((dp->i_d.di_aformat == XFS_DINODE_FMT_LOCAL) ||
-	    ((dp->i_d.di_aformat == XFS_DINODE_FMT_EXTENTS) &&
-	     (dp->i_d.di_anextents == 0))) {
+	if (dp->i_d.di_aformat == XFS_DINODE_FMT_LOCAL ||
+	    (dp->i_d.di_aformat == XFS_DINODE_FMT_EXTENTS &&
+	     dp->i_d.di_anextents == 0)) {
 
 		/*
 		 * Build initial attribute list (if required).
@@ -349,9 +353,8 @@ xfs_attr_set_int(
 			 * the transaction goes to disk before returning
 			 * to the user.
 			 */
-			if (mp->m_flags & XFS_MOUNT_WSYNC) {
+			if (mp->m_flags & XFS_MOUNT_WSYNC)
 				xfs_trans_set_sync(args.trans);
-			}
 
 			if (!error && (flags & ATTR_KERNOTIME) == 0) {
 				xfs_trans_ichgtime(args.trans, dp,
@@ -361,7 +364,7 @@ xfs_attr_set_int(
 						 XFS_TRANS_RELEASE_LOG_RES);
 			xfs_iunlock(dp, XFS_ILOCK_EXCL);
 
-			return(error == 0 ? err2 : error);
+			return error ? error : err2;
 		}
 
 		/*
@@ -399,22 +402,19 @@ xfs_attr_set_int(
 
 	}
 
-	if (xfs_bmap_one_block(dp, XFS_ATTR_FORK)) {
+	if (xfs_bmap_one_block(dp, XFS_ATTR_FORK))
 		error = xfs_attr_leaf_addname(&args);
-	} else {
+	else
 		error = xfs_attr_node_addname(&args);
-	}
-	if (error) {
+	if (error)
 		goto out;
-	}
 
 	/*
 	 * If this is a synchronous mount, make sure that the
 	 * transaction goes to disk before returning to the user.
 	 */
-	if (mp->m_flags & XFS_MOUNT_WSYNC) {
+	if (mp->m_flags & XFS_MOUNT_WSYNC)
 		xfs_trans_set_sync(args.trans);
-	}
 
 	if ((flags & ATTR_KERNOTIME) == 0)
 		xfs_trans_ichgtime(args.trans, dp, XFS_ICHGTIME_CHG);
@@ -426,37 +426,15 @@ xfs_attr_set_int(
 	error = xfs_trans_commit(args.trans, XFS_TRANS_RELEASE_LOG_RES);
 	xfs_iunlock(dp, XFS_ILOCK_EXCL);
 
-	return(error);
+	return error;
 
 out:
-	if (args.trans)
+	if (args.trans) {
 		xfs_trans_cancel(args.trans,
 			XFS_TRANS_RELEASE_LOG_RES|XFS_TRANS_ABORT);
+	}
 	xfs_iunlock(dp, XFS_ILOCK_EXCL);
-	return(error);
-}
-
-int
-xfs_attr_set(
-	xfs_inode_t	*dp,
-	const unsigned char *name,
-	unsigned char	*value,
-	int		valuelen,
-	int		flags)
-{
-	int             error;
-	struct xfs_name	xname;
-
-	XFS_STATS_INC(xs_attr_set);
-
-	if (XFS_FORCED_SHUTDOWN(dp->i_mount))
-		return (EIO);
-
-	error = xfs_attr_name_to_xname(&xname, name);
-	if (error)
-		return error;
-
-	return xfs_attr_set_int(dp, &xname, value, valuelen, flags);
+	return error;
 }
 
 /*

From b87d022c275bce66553a27b68790e7c91927875f Mon Sep 17 00:00:00 2001
From: Christoph Hellwig <hch@lst.de>
Date: Tue, 13 May 2014 16:34:24 +1000
Subject: [PATCH 2/5] xfs: fold xfs_attr_get_int into xfs_attr_get

This allows doing an unlocked check if an attr for is present at all and
slightly reduce the lock hold time if we actually do an attr get.

Plus various minor style fixes to the new xfs_attr_get.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
---
 fs/xfs/xfs_attr.c | 85 +++++++++++++++++------------------------------
 1 file changed, 30 insertions(+), 55 deletions(-)

diff --git a/fs/xfs/xfs_attr.c b/fs/xfs/xfs_attr.c
index eb3ae8fcaf74..01f226710079 100644
--- a/fs/xfs/xfs_attr.c
+++ b/fs/xfs/xfs_attr.c
@@ -106,26 +106,34 @@ xfs_inode_hasattr(
  * Overall external interface routines.
  *========================================================================*/
 
-STATIC int
-xfs_attr_get_int(
+int
+xfs_attr_get(
 	struct xfs_inode	*ip,
-	struct xfs_name		*name,
+	const unsigned char	*name,
 	unsigned char		*value,
 	int			*valuelenp,
 	int			flags)
 {
-	xfs_da_args_t   args;
-	int             error;
+	struct xfs_da_args	args;
+	struct xfs_name		xname;
+	uint			lock_mode;
+	int			error;
+
+	XFS_STATS_INC(xs_attr_get);
+
+	if (XFS_FORCED_SHUTDOWN(ip->i_mount))
+		return EIO;
 
 	if (!xfs_inode_hasattr(ip))
 		return ENOATTR;
 
-	/*
-	 * Fill in the arg structure for this request.
-	 */
-	memset((char *)&args, 0, sizeof(args));
-	args.name = name->name;
-	args.namelen = name->len;
+	error = xfs_attr_name_to_xname(&xname, name);
+	if (error)
+		return error;
+
+	memset(&args, 0, sizeof(args));
+	args.name = xname.name;
+	args.namelen = xname.len;
 	args.value = value;
 	args.valuelen = *valuelenp;
 	args.flags = flags;
@@ -133,52 +141,19 @@ xfs_attr_get_int(
 	args.dp = ip;
 	args.whichfork = XFS_ATTR_FORK;
 
-	/*
-	 * Decide on what work routines to call based on the inode size.
-	 */
-	if (ip->i_d.di_aformat == XFS_DINODE_FMT_LOCAL) {
-		error = xfs_attr_shortform_getvalue(&args);
-	} else if (xfs_bmap_one_block(ip, XFS_ATTR_FORK)) {
-		error = xfs_attr_leaf_get(&args);
-	} else {
-		error = xfs_attr_node_get(&args);
-	}
-
-	/*
-	 * Return the number of bytes in the value to the caller.
-	 */
-	*valuelenp = args.valuelen;
-
-	if (error == EEXIST)
-		error = 0;
-	return(error);
-}
-
-int
-xfs_attr_get(
-	xfs_inode_t	*ip,
-	const unsigned char *name,
-	unsigned char	*value,
-	int		*valuelenp,
-	int		flags)
-{
-	int		error;
-	struct xfs_name	xname;
-	uint		lock_mode;
-
-	XFS_STATS_INC(xs_attr_get);
-
-	if (XFS_FORCED_SHUTDOWN(ip->i_mount))
-		return(EIO);
-
-	error = xfs_attr_name_to_xname(&xname, name);
-	if (error)
-		return error;
-
 	lock_mode = xfs_ilock_attr_map_shared(ip);
-	error = xfs_attr_get_int(ip, &xname, value, valuelenp, flags);
+	if (!xfs_inode_hasattr(ip))
+		error = ENOATTR;
+	else if (ip->i_d.di_aformat == XFS_DINODE_FMT_LOCAL)
+		error = xfs_attr_shortform_getvalue(&args);
+	else if (xfs_bmap_one_block(ip, XFS_ATTR_FORK))
+		error = xfs_attr_leaf_get(&args);
+	else
+		error = xfs_attr_node_get(&args);
 	xfs_iunlock(ip, lock_mode);
-	return(error);
+
+	*valuelenp = args.valuelen;
+	return error == EEXIST ? 0 : error;
 }
 
 /*

From 1bc426a76b1a8ecf00d9a3ec8e9765a21ab4082f Mon Sep 17 00:00:00 2001
From: Christoph Hellwig <hch@lst.de>
Date: Tue, 13 May 2014 16:34:33 +1000
Subject: [PATCH 3/5] xfs: fold xfs_attr_remove_int into xfs_attr_remove

Also remove a useless ilock roundtrip for the first attr fork check, it's
racy anyway and we redo it later under the ilock before we start the removal.

Plus various minor style fixes to the new xfs_attr_remove.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
---
 fs/xfs/xfs_attr.c | 97 +++++++++++++++++------------------------------
 1 file changed, 35 insertions(+), 62 deletions(-)

diff --git a/fs/xfs/xfs_attr.c b/fs/xfs/xfs_attr.c
index 01f226710079..a96e27bfc58b 100644
--- a/fs/xfs/xfs_attr.c
+++ b/fs/xfs/xfs_attr.c
@@ -416,21 +416,34 @@ out:
  * Generic handler routine to remove a name from an attribute list.
  * Transitions attribute list from Btree to shortform as necessary.
  */
-STATIC int
-xfs_attr_remove_int(xfs_inode_t *dp, struct xfs_name *name, int flags)
+int
+xfs_attr_remove(
+	struct xfs_inode	*dp,
+	const unsigned char	*name,
+	int			flags)
 {
-	xfs_da_args_t	args;
-	xfs_fsblock_t	firstblock;
-	xfs_bmap_free_t	flist;
-	int		error;
-	xfs_mount_t	*mp = dp->i_mount;
+	struct xfs_mount	*mp = dp->i_mount;
+	struct xfs_da_args	args;
+	struct xfs_bmap_free	flist;
+	struct xfs_name		xname;
+	xfs_fsblock_t		firstblock;
+	int			error;
 
-	/*
-	 * Fill in the arg structure for this request.
-	 */
-	memset((char *)&args, 0, sizeof(args));
-	args.name = name->name;
-	args.namelen = name->len;
+	XFS_STATS_INC(xs_attr_remove);
+
+	if (XFS_FORCED_SHUTDOWN(dp->i_mount))
+		return EIO;
+
+	if (!xfs_inode_hasattr(dp))
+		return ENOATTR;
+
+	error = xfs_attr_name_to_xname(&xname, name);
+	if (error)
+		return error;
+
+	memset(&args, 0, sizeof(args));
+	args.name = xname.name;
+	args.namelen = xname.len;
 	args.flags = flags;
 	args.hashval = xfs_da_hashname(args.name, args.namelen);
 	args.dp = dp;
@@ -446,9 +459,6 @@ xfs_attr_remove_int(xfs_inode_t *dp, struct xfs_name *name, int flags)
 	 */
 	args.op_flags = XFS_DA_OP_OKNOENT;
 
-	/*
-	 * Attach the dquots to the inode.
-	 */
 	error = xfs_qm_dqattach(dp, 0);
 	if (error)
 		return error;
@@ -477,7 +487,7 @@ xfs_attr_remove_int(xfs_inode_t *dp, struct xfs_name *name, int flags)
 				  XFS_ATTRRM_SPACE_RES(mp), 0);
 	if (error) {
 		xfs_trans_cancel(args.trans, 0);
-		return(error);
+		return error;
 	}
 
 	xfs_ilock(dp, XFS_ILOCK_EXCL);
@@ -487,35 +497,26 @@ xfs_attr_remove_int(xfs_inode_t *dp, struct xfs_name *name, int flags)
 	 */
 	xfs_trans_ijoin(args.trans, dp, 0);
 
-	/*
-	 * Decide on what work routines to call based on the inode size.
-	 */
 	if (!xfs_inode_hasattr(dp)) {
 		error = XFS_ERROR(ENOATTR);
-		goto out;
-	}
-	if (dp->i_d.di_aformat == XFS_DINODE_FMT_LOCAL) {
+	} else if (dp->i_d.di_aformat == XFS_DINODE_FMT_LOCAL) {
 		ASSERT(dp->i_afp->if_flags & XFS_IFINLINE);
 		error = xfs_attr_shortform_remove(&args);
-		if (error) {
-			goto out;
-		}
 	} else if (xfs_bmap_one_block(dp, XFS_ATTR_FORK)) {
 		error = xfs_attr_leaf_removename(&args);
 	} else {
 		error = xfs_attr_node_removename(&args);
 	}
-	if (error) {
+
+	if (error)
 		goto out;
-	}
 
 	/*
 	 * If this is a synchronous mount, make sure that the
 	 * transaction goes to disk before returning to the user.
 	 */
-	if (mp->m_flags & XFS_MOUNT_WSYNC) {
+	if (mp->m_flags & XFS_MOUNT_WSYNC)
 		xfs_trans_set_sync(args.trans);
-	}
 
 	if ((flags & ATTR_KERNOTIME) == 0)
 		xfs_trans_ichgtime(args.trans, dp, XFS_ICHGTIME_CHG);
@@ -527,45 +528,17 @@ xfs_attr_remove_int(xfs_inode_t *dp, struct xfs_name *name, int flags)
 	error = xfs_trans_commit(args.trans, XFS_TRANS_RELEASE_LOG_RES);
 	xfs_iunlock(dp, XFS_ILOCK_EXCL);
 
-	return(error);
+	return error;
 
 out:
-	if (args.trans)
+	if (args.trans) {
 		xfs_trans_cancel(args.trans,
 			XFS_TRANS_RELEASE_LOG_RES|XFS_TRANS_ABORT);
-	xfs_iunlock(dp, XFS_ILOCK_EXCL);
-	return(error);
-}
-
-int
-xfs_attr_remove(
-	xfs_inode_t	*dp,
-	const unsigned char *name,
-	int		flags)
-{
-	int		error;
-	struct xfs_name	xname;
-
-	XFS_STATS_INC(xs_attr_remove);
-
-	if (XFS_FORCED_SHUTDOWN(dp->i_mount))
-		return (EIO);
-
-	error = xfs_attr_name_to_xname(&xname, name);
-	if (error)
-		return error;
-
-	xfs_ilock(dp, XFS_ILOCK_SHARED);
-	if (!xfs_inode_hasattr(dp)) {
-		xfs_iunlock(dp, XFS_ILOCK_SHARED);
-		return XFS_ERROR(ENOATTR);
 	}
-	xfs_iunlock(dp, XFS_ILOCK_SHARED);
-
-	return xfs_attr_remove_int(dp, &xname, flags);
+	xfs_iunlock(dp, XFS_ILOCK_EXCL);
+	return error;
 }
 
-
 /*========================================================================
  * External routines when attribute list is inside the inode
  *========================================================================*/

From 67fd718f30108db320ffc4bef205137b69e60d3a Mon Sep 17 00:00:00 2001
From: Christoph Hellwig <hch@lst.de>
Date: Tue, 13 May 2014 16:34:43 +1000
Subject: [PATCH 4/5] xfs: simplify attr name setup

Replace xfs_attr_name_to_xname with a new xfs_attr_args_init helper that
sets up the basic da_args structure without using a temporary xfs_name
structure.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
---
 fs/xfs/xfs_attr.c | 74 +++++++++++++++++++----------------------------
 1 file changed, 29 insertions(+), 45 deletions(-)

diff --git a/fs/xfs/xfs_attr.c b/fs/xfs/xfs_attr.c
index a96e27bfc58b..120862139a63 100644
--- a/fs/xfs/xfs_attr.c
+++ b/fs/xfs/xfs_attr.c
@@ -77,17 +77,26 @@ STATIC int xfs_attr_refillstate(xfs_da_state_t *state);
 
 
 STATIC int
-xfs_attr_name_to_xname(
-	struct xfs_name	*xname,
-	const unsigned char *aname)
+xfs_attr_args_init(
+	struct xfs_da_args	*args,
+	struct xfs_inode	*dp,
+	const unsigned char	*name,
+	int			flags)
 {
-	if (!aname)
+
+	if (!name)
 		return EINVAL;
-	xname->name = aname;
-	xname->len = strlen((char *)aname);
-	if (xname->len >= MAXNAMELEN)
+
+	memset(args, 0, sizeof(*args));
+	args->whichfork = XFS_ATTR_FORK;
+	args->dp = dp;
+	args->flags = flags;
+	args->name = name;
+	args->namelen = strlen((const char *)name);
+	if (args->namelen >= MAXNAMELEN)
 		return EFAULT;		/* match IRIX behaviour */
 
+	args->hashval = xfs_da_hashname(args->name, args->namelen);
 	return 0;
 }
 
@@ -115,7 +124,6 @@ xfs_attr_get(
 	int			flags)
 {
 	struct xfs_da_args	args;
-	struct xfs_name		xname;
 	uint			lock_mode;
 	int			error;
 
@@ -127,19 +135,12 @@ xfs_attr_get(
 	if (!xfs_inode_hasattr(ip))
 		return ENOATTR;
 
-	error = xfs_attr_name_to_xname(&xname, name);
+	error = xfs_attr_args_init(&args, ip, name, flags);
 	if (error)
 		return error;
 
-	memset(&args, 0, sizeof(args));
-	args.name = xname.name;
-	args.namelen = xname.len;
 	args.value = value;
 	args.valuelen = *valuelenp;
-	args.flags = flags;
-	args.hashval = xfs_da_hashname(args.name, args.namelen);
-	args.dp = ip;
-	args.whichfork = XFS_ATTR_FORK;
 
 	lock_mode = xfs_ilock_attr_map_shared(ip);
 	if (!xfs_inode_hasattr(ip))
@@ -208,7 +209,6 @@ xfs_attr_set(
 	struct xfs_da_args	args;
 	struct xfs_bmap_free	flist;
 	struct xfs_trans_res	tres;
-	struct xfs_name		xname;
 	xfs_fsblock_t		firstblock;
 	int			rsvd = (flags & ATTR_ROOT) != 0;
 	int			error, err2, committed, local;
@@ -218,10 +218,19 @@ xfs_attr_set(
 	if (XFS_FORCED_SHUTDOWN(dp->i_mount))
 		return EIO;
 
-	error = xfs_attr_name_to_xname(&xname, name);
+	error = xfs_attr_args_init(&args, dp, name, flags);
 	if (error)
 		return error;
 
+	args.value = value;
+	args.valuelen = valuelen;
+	args.firstblock = &firstblock;
+	args.flist = &flist;
+	args.op_flags = XFS_DA_OP_ADDNAME | XFS_DA_OP_OKNOENT;
+
+	/* Size is now blocks for attribute data */
+	args.total = xfs_attr_calc_size(dp, args.namelen, valuelen, &local);
+
 	error = xfs_qm_dqattach(dp, 0);
 	if (error)
 		return error;
@@ -232,29 +241,13 @@ xfs_attr_set(
 	 */
 	if (XFS_IFORK_Q(dp) == 0) {
 		int sf_size = sizeof(xfs_attr_sf_hdr_t) +
-			      XFS_ATTR_SF_ENTSIZE_BYNAME(xname.len, valuelen);
+			XFS_ATTR_SF_ENTSIZE_BYNAME(args.namelen, valuelen);
 
 		error = xfs_bmap_add_attrfork(dp, sf_size, rsvd);
 		if (error)
 			return error;
 	}
 
-	memset(&args, 0, sizeof(args));
-	args.name = xname.name;
-	args.namelen = xname.len;
-	args.value = value;
-	args.valuelen = valuelen;
-	args.flags = flags;
-	args.hashval = xfs_da_hashname(args.name, args.namelen);
-	args.dp = dp;
-	args.firstblock = &firstblock;
-	args.flist = &flist;
-	args.whichfork = XFS_ATTR_FORK;
-	args.op_flags = XFS_DA_OP_ADDNAME | XFS_DA_OP_OKNOENT;
-
-	/* Size is now blocks for attribute data */
-	args.total = xfs_attr_calc_size(dp, xname.len, valuelen, &local);
-
 	/*
 	 * Start our first transaction of the day.
 	 *
@@ -425,7 +418,6 @@ xfs_attr_remove(
 	struct xfs_mount	*mp = dp->i_mount;
 	struct xfs_da_args	args;
 	struct xfs_bmap_free	flist;
-	struct xfs_name		xname;
 	xfs_fsblock_t		firstblock;
 	int			error;
 
@@ -437,20 +429,12 @@ xfs_attr_remove(
 	if (!xfs_inode_hasattr(dp))
 		return ENOATTR;
 
-	error = xfs_attr_name_to_xname(&xname, name);
+	error = xfs_attr_args_init(&args, dp, name, flags);
 	if (error)
 		return error;
 
-	memset(&args, 0, sizeof(args));
-	args.name = xname.name;
-	args.namelen = xname.len;
-	args.flags = flags;
-	args.hashval = xfs_da_hashname(args.name, args.namelen);
-	args.dp = dp;
 	args.firstblock = &firstblock;
 	args.flist = &flist;
-	args.total = 0;
-	args.whichfork = XFS_ATTR_FORK;
 
 	/*
 	 * we have no control over the attribute names that userspace passes us

From 6c888af0b4ca66565b2aa73147ebc1d139c3bd1b Mon Sep 17 00:00:00 2001
From: Christoph Hellwig <hch@lst.de>
Date: Tue, 13 May 2014 16:40:19 +1000
Subject: [PATCH 5/5] xfs: pass struct da_args to xfs_attr_calc_size

And remove a very confused comment.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
---
 fs/xfs/xfs_attr.c | 14 +++++---------
 1 file changed, 5 insertions(+), 9 deletions(-)

diff --git a/fs/xfs/xfs_attr.c b/fs/xfs/xfs_attr.c
index 120862139a63..86f482e5798f 100644
--- a/fs/xfs/xfs_attr.c
+++ b/fs/xfs/xfs_attr.c
@@ -162,12 +162,10 @@ xfs_attr_get(
  */
 STATIC int
 xfs_attr_calc_size(
-	struct xfs_inode 	*ip,
-	int			namelen,
-	int			valuelen,
+	struct xfs_da_args	*args,
 	int			*local)
 {
-	struct xfs_mount 	*mp = ip->i_mount;
+	struct xfs_mount	*mp = args->dp->i_mount;
 	int			size;
 	int			nblks;
 
@@ -175,7 +173,7 @@ xfs_attr_calc_size(
 	 * Determine space new attribute will use, and if it would be
 	 * "local" or "remote" (note: local != inline).
 	 */
-	size = xfs_attr_leaf_newentsize(namelen, valuelen,
+	size = xfs_attr_leaf_newentsize(args->namelen, args->valuelen,
 					mp->m_sb.sb_blocksize, local);
 
 	nblks = XFS_DAENTER_SPACE_RES(mp, XFS_ATTR_FORK);
@@ -189,7 +187,7 @@ xfs_attr_calc_size(
 		 * Out of line attribute, cannot double split, but
 		 * make room for the attribute value itself.
 		 */
-		uint	dblocks = XFS_B_TO_FSB(mp, valuelen);
+		uint	dblocks = XFS_B_TO_FSB(mp, args->valuelen);
 		nblks += dblocks;
 		nblks += XFS_NEXTENTADD_SPACE_RES(mp, dblocks, XFS_ATTR_FORK);
 	}
@@ -227,9 +225,7 @@ xfs_attr_set(
 	args.firstblock = &firstblock;
 	args.flist = &flist;
 	args.op_flags = XFS_DA_OP_ADDNAME | XFS_DA_OP_OKNOENT;
-
-	/* Size is now blocks for attribute data */
-	args.total = xfs_attr_calc_size(dp, args.namelen, valuelen, &local);
+	args.total = xfs_attr_calc_size(&args, &local);
 
 	error = xfs_qm_dqattach(dp, 0);
 	if (error)