On Sat, Jan 30, 2010 at 01:46:04PM +0530, Aneesh Kumar K. V wrote:
>
> Hi Chris,
>
> I see that you merged an older version of this patch. But i guess it
> still have some issues.
Thanks, I missed v2 in the patchwork list. I'll fix it up.
-chris
>
> -anesh
> On Fri, 22 Jan 2010 11:02:45 +0530, "Aneesh Kumar K.V" <aneesh.kumar@xxxxxxxxxxxxxxxxxx> wrote:
> > Even though we allocate more, we should be updating inode i_size
> > as per the arguments passed
> >
> > Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@xxxxxxxxxxxxxxxxxx>
> > ---
> > Changes from V1:
> > We should update i_size only if actual_len and cur_offset are both
> > larger than i_size. Otherwise if actual_len is < i_size and cur_offset > i_size
> > we may end up setting wrong i_size value
> >
> > fs/btrfs/inode.c | 17 ++++++++++++-----
> > 1 files changed, 12 insertions(+), 5 deletions(-)
> >
> > diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
> > index 5440bab..ac4cb6b 100644
> > --- a/fs/btrfs/inode.c
> > +++ b/fs/btrfs/inode.c
> > @@ -5789,7 +5789,7 @@ out_fail:
> > }
> >
> > static int prealloc_file_range(struct inode *inode, u64 start, u64 end,
> > - u64 alloc_hint, int mode)
> > + u64 alloc_hint, int mode, loff_t actual_len)
> > {
> > struct btrfs_trans_handle *trans;
> > struct btrfs_root *root = BTRFS_I(inode)->root;
> > @@ -5798,6 +5798,7 @@ static int prealloc_file_range(struct inode *inode, u64 start, u64 end,
> > u64 cur_offset = start;
> > u64 num_bytes = end - start;
> > int ret = 0;
> > + u64 i_size;
> >
> > while (num_bytes > 0) {
> > alloc_size = min(num_bytes, root->fs_info->max_extent);
> > @@ -5835,9 +5836,15 @@ static int prealloc_file_range(struct inode *inode, u64 start, u64 end,
> > inode->i_ctime = CURRENT_TIME;
> > BTRFS_I(inode)->flags |= BTRFS_INODE_PREALLOC;
> > if (!(mode & FALLOC_FL_KEEP_SIZE) &&
> > - cur_offset > inode->i_size) {
> > - i_size_write(inode, cur_offset);
> > - btrfs_ordered_update_i_size(inode, cur_offset, NULL);
> > + (actual_len > inode->i_size) &&
> > + (cur_offset > inode->i_size)) {
> > +
> > + if (cur_offset > actual_len)
> > + i_size = actual_len;
> > + else
> > + i_size = cur_offset;
> > + i_size_write(inode, i_size);
> > + btrfs_ordered_update_i_size(inode, i_size, NULL);
> > }
> >
> > ret = btrfs_update_inode(trans, root, inode);
> > @@ -5930,7 +5937,7 @@ static long btrfs_fallocate(struct inode *inode, int mode,
> > !test_bit(EXTENT_FLAG_PREALLOC, &em->flags))) {
> > ret = prealloc_file_range(inode,
> > cur_offset, last_byte,
> > - alloc_hint, mode);
> > + alloc_hint, mode, offset+len);
> > if (ret < 0) {
> > free_extent_map(em);
> > break;
> > --
> > 1.6.6.1.383.g5a9f
> >
> > --
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