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| author | Russell Cattelan <cattelan@redhat.com> | 2006-10-09 12:11:54 -0500 |
|---|---|---|
| committer | Steven Whitehouse <swhiteho@redhat.com> | 2006-10-12 17:09:54 -0400 |
| commit | 52ae7b7935a079aaba25da98fe90772d04109f26 (patch) | |
| tree | f03dbb3037136fe72fb05d886eb5a2b48c0548c1 | |
| parent | c25d5180441e344a3368d100c57f0a481c6944f7 (diff) | |
| download | lwn-52ae7b7935a079aaba25da98fe90772d04109f26.tar.gz lwn-52ae7b7935a079aaba25da98fe90772d04109f26.zip | |
[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>
| -rw-r--r-- | fs/gfs2/ops_address.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/fs/gfs2/ops_address.c b/fs/gfs2/ops_address.c index 4fb743f4e4a4..bdf56cf66224 100644 --- a/fs/gfs2/ops_address.c +++ b/fs/gfs2/ops_address.c @@ -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 end = ((loff_t)page->index << PAGE_CACHE_SHIFT) + to; 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); error = gfs2_glock_nq_m_atime(1, &ip->i_gh); if (error) 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) goto out_unlock; |