remove inode_setattr

Replace inode_setattr with opencoded variants of it in all callers.  This
moves the remaining call to vmtruncate into the filesystem methods where it
can be replaced with the proper truncate sequence.

In a few cases it was obvious that we would never end up calling vmtruncate
so it was left out in the opencoded variant:

 spufs: explicitly checks for ATTR_SIZE earlier
 btrfs,hugetlbfs,logfs,dlmfs: explicitly clears ATTR_SIZE earlier
 ufs: contains an opencoded simple_seattr + truncate that sets the filesize just above

In addition to that ncpfs called inode_setattr with handcrafted iattrs,
which allowed to trim down the opencoded variant.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

3 files changed, 46 insertions, 15 deletions

diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c
index f03afd9..6c023a3 100644
--- a/fs/gfs2/inode.c
+++ b/fs/gfs2/inode.c
@@ -991,18 +991,29 @@ fail:
 
 static int __gfs2_setattr_simple(struct gfs2_inode *ip, struct iattr *attr)
 {
+	struct inode *inode = &ip->i_inode;
 	struct buffer_head *dibh;
 	int error;
 
 	error = gfs2_meta_inode_buffer(ip, &dibh);
-	if (!error) {
-		error = inode_setattr(&ip->i_inode, attr);
-		gfs2_assert_warn(GFS2_SB(&ip->i_inode), !error);
-		gfs2_trans_add_bh(ip->i_gl, dibh, 1);
-		gfs2_dinode_out(ip, dibh->b_data);
-		brelse(dibh);
+	if (error)
+		return error;
+
+	if ((attr->ia_valid & ATTR_SIZE) &&
+	    attr->ia_size != i_size_read(inode)) {
+		error = vmtruncate(inode, attr->ia_size);
+		if (error)
+			return error;
 	}
-	return error;
+
+	setattr_copy(inode, attr);
+	mark_inode_dirty(inode);
+
+	gfs2_assert_warn(GFS2_SB(inode), !error);
+	gfs2_trans_add_bh(ip->i_gl, dibh, 1);
+	gfs2_dinode_out(ip, dibh->b_data);
+	brelse(dibh);
+	return 0;
 }
 
 /**
diff --git a/fs/gfs2/ops_inode.c b/fs/gfs2/ops_inode.c
index 98cdd05..d7d410a 100644
--- a/fs/gfs2/ops_inode.c
+++ b/fs/gfs2/ops_inode.c
@@ -1136,8 +1136,16 @@ static int setattr_chown(struct inode *inode, struct iattr *attr)
 	if (error)
 		goto out_end_trans;
 
-	error = inode_setattr(inode, attr);
-	gfs2_assert_warn(sdp, !error);
+	if ((attr->ia_valid & ATTR_SIZE) &&
+	    attr->ia_size != i_size_read(inode)) {
+		int error;
+
+		error = vmtruncate(inode, attr->ia_size);
+		gfs2_assert_warn(sdp, !error);
+	}
+
+	setattr_copy(inode, attr);
+	mark_inode_dirty(inode);
 
 	gfs2_trans_add_bh(ip->i_gl, dibh, 1);
 	gfs2_dinode_out(ip, dibh->b_data);
diff --git a/fs/gfs2/xattr.c b/fs/gfs2/xattr.c
index 82f93da..776af6e 100644
--- a/fs/gfs2/xattr.c
+++ b/fs/gfs2/xattr.c
@@ -1296,6 +1296,7 @@ fail:
 
 int gfs2_xattr_acl_chmod(struct gfs2_inode *ip, struct iattr *attr, char *data)
 {
+	struct inode *inode = &ip->i_inode;
 	struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
 	struct gfs2_ea_location el;
 	struct buffer_head *dibh;
@@ -1321,14 +1322,25 @@ int gfs2_xattr_acl_chmod(struct gfs2_inode *ip, struct iattr *attr, char *data)
 		return error;
 
 	error = gfs2_meta_inode_buffer(ip, &dibh);
-	if (!error) {
-		error = inode_setattr(&ip->i_inode, attr);
-		gfs2_assert_warn(GFS2_SB(&ip->i_inode), !error);
-		gfs2_trans_add_bh(ip->i_gl, dibh, 1);
-		gfs2_dinode_out(ip, dibh->b_data);
-		brelse(dibh);
+	if (error)
+		goto out_trans_end;
+
+	if ((attr->ia_valid & ATTR_SIZE) &&
+	    attr->ia_size != i_size_read(inode)) {
+		int error;
+
+		error = vmtruncate(inode, attr->ia_size);
+		gfs2_assert_warn(GFS2_SB(inode), !error);
 	}
 
+	setattr_copy(inode, attr);
+	mark_inode_dirty(inode);
+
+	gfs2_trans_add_bh(ip->i_gl, dibh, 1);
+	gfs2_dinode_out(ip, dibh->b_data);
+	brelse(dibh);
+
+out_trans_end:
 	gfs2_trans_end(sdp);
 	return error;
 }