1 files changed, 63 insertions, 7 deletions

diff --git a/fs/hfs/inode.c b/fs/hfs/inode.c
index 14f5cb1b9fdc..397b7adc7ce6 100644
--- a/fs/hfs/inode.c
+++ b/fs/hfs/inode.c
@@ -39,10 +39,19 @@ static int hfs_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,
                                 hfs_get_block,
                                 &HFS_I(mapping->host)->phys_size);
+        if (unlikely(ret)) {
+                loff_t isize = mapping->host->i_size;
+                if (pos + len > isize)
+                        vmtruncate(mapping->host, isize);
+        }
+
+        return ret;
 }
 
 static sector_t hfs_bmap(struct address_space *mapping, sector_t block)
@@ -112,9 +121,24 @@ static ssize_t hfs_direct_IO(int rw, struct kiocb *iocb,
 {
         struct file *file = iocb->ki_filp;
         struct inode *inode = file->f_path.dentry->d_inode->i_mapping->host;
+        ssize_t ret;
 
-        return blockdev_direct_IO(rw, iocb, inode, inode->i_sb->s_bdev, iov,
+        ret = blockdev_direct_IO(rw, iocb, inode, inode->i_sb->s_bdev, iov,
                                   offset, nr_segs, hfs_get_block, NULL);
+
+        /*
+         * In case of error extending write may have instantiated a few
+         * blocks outside i_size. Trim these off again.
+         */
+        if (unlikely((rw & WRITE) && ret < 0)) {
+                loff_t isize = i_size_read(inode);
+                loff_t end = offset + iov_length(iov, nr_segs);
+
+                if (end > isize)
+                        vmtruncate(inode, isize);
+        }
+
+        return ret;
 }
 
 static int hfs_writepages(struct address_space *mapping,
@@ -507,8 +531,10 @@ out:
         return NULL;
 }
 
-void hfs_clear_inode(struct inode *inode)
+void hfs_evict_inode(struct inode *inode)
 {
+        truncate_inode_pages(&inode->i_data, 0);
+        end_writeback(inode);
         if (HFS_IS_RSRC(inode) && HFS_I(inode)->rsrc_inode) {
                 HFS_I(HFS_I(inode)->rsrc_inode)->rsrc_inode = NULL;
                 iput(HFS_I(inode)->rsrc_inode);
@@ -588,13 +614,43 @@ int hfs_inode_setattr(struct dentry *dentry, struct iattr * attr)
                         attr->ia_mode = inode->i_mode & ~S_IWUGO;
                 attr->ia_mode &= S_ISDIR(inode->i_mode) ? ~hsb->s_dir_umask: ~hsb->s_file_umask;
         }
-        error = inode_setattr(inode, attr);
-        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;
+        }
+
+        setattr_copy(inode, attr);
+        mark_inode_dirty(inode);
         return 0;
 }
 
+static int hfs_file_fsync(struct file *filp, int datasync)
+{
+        struct inode *inode = filp->f_mapping->host;
+        struct super_block * sb;
+        int ret, err;
+
+        /* sync the inode to buffers */
+        ret = write_inode_now(inode, 0);
+
+        /* sync the superblock to buffers */
+        sb = inode->i_sb;
+        if (sb->s_dirt) {
+                lock_super(sb);
+                sb->s_dirt = 0;
+                if (!(sb->s_flags & MS_RDONLY))
+                        hfs_mdb_commit(sb);
+                unlock_super(sb);
+        }
+        /* .. finally sync the buffers to disk */
+        err = sync_blockdev(sb->s_bdev);
+        if (!ret)
+                ret = err;
+        return ret;
+}
 
 static const struct file_operations hfs_file_operations = {
         .llseek         = generic_file_llseek,
@@ -604,7 +660,7 @@ static const struct file_operations hfs_file_operations = {
         .aio_write      = generic_file_aio_write,
         .mmap           = generic_file_mmap,
         .splice_read    = generic_file_splice_read,
-        .fsync          = file_fsync,
+        .fsync          = hfs_file_fsync,
         .open           = hfs_file_open,
         .release        = hfs_file_release,
 };