diff options
| -rw-r--r-- | fs/ext4/extents.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c index c2b004e29ad..f4ef0b745a5 100644 --- a/fs/ext4/extents.c +++ b/fs/ext4/extents.c @@ -2570,8 +2570,18 @@ int ext4_ext_get_blocks(handle_t *handle, struct inode *inode, } if (create == EXT4_CREATE_UNINITIALIZED_EXT) goto out; - if (!create) + if (!create) { + /* + * We have blocks reserved already. We + * return allocated blocks so that delalloc + * won't do block reservation for us. But + * the buffer head will be unmapped so that + * a read from the block returns 0s. + */ + if (allocated > max_blocks) + allocated = max_blocks; goto out2; + } ret = ext4_ext_convert_to_initialized(handle, inode, path, iblock, |