diff options
Diffstat (limited to 'fs/ext4/file.c')
| -rw-r--r-- | fs/ext4/file.c | 24 |
1 files changed, 23 insertions, 1 deletions
diff --git a/fs/ext4/file.c b/fs/ext4/file.c index ec54fec96a81..83ef9c9ed208 100644 --- a/fs/ext4/file.c +++ b/fs/ext4/file.c @@ -323,6 +323,8 @@ ext4_dax_write_iter(struct kiocb *iocb, struct iov_iter *from) ssize_t ret; size_t count; loff_t offset; + handle_t *handle; + bool extend = false; struct inode *inode = file_inode(iocb->ki_filp); if (!inode_trylock(inode)) { @@ -342,8 +344,28 @@ ext4_dax_write_iter(struct kiocb *iocb, struct iov_iter *from) offset = iocb->ki_pos; count = iov_iter_count(from); + + if (offset + count > EXT4_I(inode)->i_disksize) { + handle = ext4_journal_start(inode, EXT4_HT_INODE, 2); + if (IS_ERR(handle)) { + ret = PTR_ERR(handle); + goto out; + } + + ret = ext4_orphan_add(handle, inode); + if (ret) { + ext4_journal_stop(handle); + goto out; + } + + extend = true; + ext4_journal_stop(handle); + } + ret = dax_iomap_rw(iocb, from, &ext4_iomap_ops); - ret = ext4_handle_inode_extension(inode, offset, ret, count); + + if (extend) + ret = ext4_handle_inode_extension(inode, offset, ret, count); out: inode_unlock(inode); if (ret > 0) |