get rid of cont_write_begin_newtrunc

Move the call to vmtruncate to get rid of accessive blocks to the callers
in preparation of the new truncate sequence and rename the non-truncating
version to cont_write_begin.

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

1 files changed, 10 insertions, 1 deletions

diff --git a/fs/affs/file.c b/fs/affs/file.c
index 322710c3eedf..c4a9875bd1a6 100644
--- a/fs/affs/file.c
+++ b/fs/affs/file.c
@@ -406,10 +406,19 @@ static int affs_write_begin(struct file *file, struct address_space *mapping,
                         loff_t pos, unsigned len, unsigned flags,
                         struct page **pagep, void **fsdata)
 {
+        int ret;
+
         *pagep = NULL;
-        return cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
+        ret = cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
                                 affs_get_block,
                                 &AFFS_I(mapping->host)->mmu_private);
+        if (unlikely(ret)) {
+                loff_t isize = mapping->host->i_size;
+                if (pos + len > isize)
+                        vmtruncate(mapping->host, isize);
+        }
+
+        return ret;
 }
 
 static sector_t _affs_bmap(struct address_space *mapping, sector_t block)