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-rw-r--r--fs/hfs/inode.c70
1 files changed, 63 insertions, 7 deletions
diff --git a/fs/hfs/inode.c b/fs/hfs/inode.c
index 14f5cb1..397b7ad 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,
};
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