[ 3.5.y.z extended stable ] Patch "hpfs: drop vmtruncate" has been added to staging queue

[Luis Henriques]

This is a note to let you know that I have just added a patch titled

    hpfs: drop vmtruncate

to the linux-3.5.y-queue branch of the 3.5.y.z extended stable tree 
which can be found at:

 http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.5.y-queue

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.5.y.z tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Luis

------

>From 6da48defcd771323c9f61b1a2644c1289bfaee84 Mon Sep 17 00:00:00 2001
From: Marco Stornelli <marco.stornelli at gmail.com>
Date: Sat, 15 Dec 2012 11:53:50 +0100
Subject: [PATCH] hpfs: drop vmtruncate

commit 70b31c4c88e253f4c2066367401118edab957614 upstream.

Removed vmtruncate

Signed-off-by: Marco Stornelli <marco.stornelli at gmail.com>
Signed-off-by: Al Viro <viro at zeniv.linux.org.uk>
Signed-off-by: Luis Henriques <luis.henriques at canonical.com>
---
 fs/hpfs/file.c    | 20 +++++++++++++-------
 fs/hpfs/hpfs_fn.h |  1 +
 fs/hpfs/inode.c   |  5 ++++-
 3 files changed, 18 insertions(+), 8 deletions(-)

diff --git a/fs/hpfs/file.c b/fs/hpfs/file.c
index 89d2a58..fbfe2df 100644
--- a/fs/hpfs/file.c
+++ b/fs/hpfs/file.c
@@ -50,7 +50,7 @@ static secno hpfs_bmap(struct inode *inode, unsigned file_secno)
 	return disk_secno;
 }

-static void hpfs_truncate(struct inode *i)
+void hpfs_truncate(struct inode *i)
 {
 	if (IS_IMMUTABLE(i)) return /*-EPERM*/;
 	hpfs_lock_assert(i->i_sb);
@@ -105,6 +105,16 @@ static int hpfs_readpage(struct file *file, struct page *page)
 	return block_read_full_page(page,hpfs_get_block);
 }

+static void hpfs_write_failed(struct address_space *mapping, loff_t to)
+{
+	struct inode *inode = mapping->host;
+
+	if (to > inode->i_size) {
+		truncate_pagecache(inode, to, inode->i_size);
+		hpfs_truncate(inode);
+	}
+}
+
 static int hpfs_write_begin(struct file *file, struct address_space *mapping,
 			loff_t pos, unsigned len, unsigned flags,
 			struct page **pagep, void **fsdata)
@@ -115,11 +125,8 @@ static int hpfs_write_begin(struct file *file, struct address_space *mapping,
 	ret = cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
 				hpfs_get_block,
 				&hpfs_i(mapping->host)->mmu_private);
-	if (unlikely(ret)) {
-		loff_t isize = mapping->host->i_size;
-		if (pos + len > isize)
-			vmtruncate(mapping->host, isize);
-	}
+	if (unlikely(ret))
+		hpfs_write_failed(mapping, pos + len);

 	return ret;
 }
@@ -166,6 +173,5 @@ const struct file_operations hpfs_file_ops =

 const struct inode_operations hpfs_file_iops =
 {
-	.truncate	= hpfs_truncate,
 	.setattr	= hpfs_setattr,
 };
diff --git a/fs/hpfs/hpfs_fn.h b/fs/hpfs/hpfs_fn.h
index c07ef1f..2623e7e 100644
--- a/fs/hpfs/hpfs_fn.h
+++ b/fs/hpfs/hpfs_fn.h
@@ -252,6 +252,7 @@ void hpfs_set_ea(struct inode *, struct fnode *, const char *,
 /* file.c */

 int hpfs_file_fsync(struct file *, loff_t, loff_t, int);
+void hpfs_truncate(struct inode *);
 extern const struct file_operations hpfs_file_ops;
 extern const struct inode_operations hpfs_file_iops;
 extern const struct address_space_operations hpfs_aops;
diff --git a/fs/hpfs/inode.c b/fs/hpfs/inode.c
index ed671e0..4c57a50 100644
--- a/fs/hpfs/inode.c
+++ b/fs/hpfs/inode.c
@@ -274,9 +274,12 @@ int hpfs_setattr(struct dentry *dentry, struct iattr *attr)

 	if ((attr->ia_valid & ATTR_SIZE) &&
 	    attr->ia_size != i_size_read(inode)) {
-		error = vmtruncate(inode, attr->ia_size);
+		error = inode_newsize_ok(inode, attr->ia_size);
 		if (error)
 			goto out_unlock;
+
+		truncate_setsize(inode, attr->ia_size);
+		hpfs_truncate(inode);
 	}

 	setattr_copy(inode, attr);
--
1.8.1.2