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[GFS2] Fix a size calculation error 

Fix a size calculation error.
The size was incorrect being computed as a
negative length and then being passed to an
unsigned parameter.

This in turn would cause the allocator to
think it needed enough meta data to store
a gigabyte file for every file created.

Signed-off-by: Russell Cattelan <cattelan@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
This commit is contained in:
Russell Cattelan 2006-10-09 12:11:54 -05:00 committed by Steven Whitehouse
parent c25d518044
commit 52ae7b7935
1 changed files with 4 additions and 2 deletions
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6
fs/gfs2/ops_address.c
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@ -370,15 +370,17 @@ static int gfs2_prepare_write(struct file *file, struct page *page,
loff_t pos = ((loff_t)page->index << PAGE_CACHE_SHIFT) + from; loff_t pos = ((loff_t)page->index << PAGE_CACHE_SHIFT) + from;
loff_t end = ((loff_t)page->index << PAGE_CACHE_SHIFT) + to; loff_t end = ((loff_t)page->index << PAGE_CACHE_SHIFT) + to;
struct gfs2_alloc *al; struct gfs2_alloc *al;
unsigned int write_len = to - from;
gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_ATIME|GL_AOP, &ip->i_gh); gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_ATIME|GL_AOP, &ip->i_gh);
error = gfs2_glock_nq_m_atime(1, &ip->i_gh); error = gfs2_glock_nq_m_atime(1, &ip->i_gh);
if (error) if (error)
goto out_uninit; goto out_uninit;
gfs2_write_calc_reserv(ip, to - from, &data_blocks, &ind_blocks); gfs2_write_calc_reserv(ip, write_len, &data_blocks, &ind_blocks);
error = gfs2_write_alloc_required(ip, pos, from - to, &alloc_required); error = gfs2_write_alloc_required(ip, pos, write_len, &alloc_required);
if (error) if (error)
goto out_unlock; goto out_unlock;