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    Subject[PATCH 15/16] Unionfs: update our inode size correctly upon partial write
    Date
    Signed-off-by: Erez Zadok <ezk@cs.sunysb.edu>
    ---
    fs/unionfs/mmap.c | 9 ++-------
    1 files changed, 2 insertions(+), 7 deletions(-)

    diff --git a/fs/unionfs/mmap.c b/fs/unionfs/mmap.c
    index ea5ef3d..8c07eed 100644
    --- a/fs/unionfs/mmap.c
    +++ b/fs/unionfs/mmap.c
    @@ -250,7 +250,6 @@ static int unionfs_commit_write(struct file *file, struct page *page,
    int err = -ENOMEM;
    struct inode *inode, *lower_inode;
    struct file *lower_file = NULL;
    - loff_t pos;
    unsigned bytes = to - from;
    char *page_data = NULL;
    mm_segment_t old_fs;
    @@ -293,12 +292,8 @@ static int unionfs_commit_write(struct file *file, struct page *page,
    if (err < 0)
    goto out;

    - inode->i_blocks = lower_inode->i_blocks;
    - /* we may have to update i_size */
    - pos = page_offset(page) + to;
    - if (pos > i_size_read(inode))
    - i_size_write(inode, pos);
    - /* if vfs_write succeeded above, sync up our times */
    + /* if vfs_write succeeded above, sync up our times/sizes */
    + fsstack_copy_inode_size(inode, lower_inode);
    unionfs_copy_attr_times(inode);
    mark_inode_dirty_sync(inode);

    --
    1.5.2.2
    -
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