diff options
Diffstat (limited to 'fs/ecryptfs/inode.c')
| -rw-r--r-- | fs/ecryptfs/inode.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/fs/ecryptfs/inode.c b/fs/ecryptfs/inode.c index 1548be26b5e..0981ae35ea1 100644 --- a/fs/ecryptfs/inode.c +++ b/fs/ecryptfs/inode.c @@ -800,6 +800,25 @@ int ecryptfs_truncate(struct dentry *dentry, loff_t new_length) goto out_fput; } } else { /* new_length < i_size_read(inode) */ + pgoff_t index = 0; + int end_pos_in_page = -1; + + if (new_length != 0) { + index = ((new_length - 1) >> PAGE_CACHE_SHIFT); + end_pos_in_page = ((new_length - 1) & ~PAGE_CACHE_MASK); + } + if (end_pos_in_page != (PAGE_CACHE_SIZE - 1)) { + if ((rc = ecryptfs_write_zeros(&fake_ecryptfs_file, + index, + (end_pos_in_page + 1), + ((PAGE_CACHE_SIZE - 1) + - end_pos_in_page)))) { + printk(KERN_ERR "Error attempting to zero out " + "the remainder of the end page on " + "reducing truncate; rc = [%d]\n", rc); + goto out_fput; + } + } vmtruncate(inode, new_length); rc = ecryptfs_write_inode_size_to_metadata( lower_file, lower_dentry->d_inode, inode, dentry, |