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Fixed excessive cluster allocation within big holes

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This commit is contained in:
Jean-Pierre André 2010-07-22 14:48:19 +02:00
parent 09df7eade5
commit f65aa991a9
1 changed files with 22 additions and 3 deletions
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25
libntfs-3g/attrib.c
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@ -1199,10 +1199,29 @@ static int ntfs_attr_fill_hole(ntfs_attr *na, s64 count, s64 *ofs,
if ((na->data_flags & ATTR_COMPRESSION_MASK)
&& (need < na->compression_block_clusters)) {
/*
* for a compressed file, be sure to allocate the full hole.
* We may need space to decompress existing compressed data.
* for a compressed file, be sure to allocate the full
* compression block, as we may need space to decompress
* existing compressed data.
* So allocate the space common to compression block
* and existing hole.
*/
rlc = ntfs_cluster_alloc(vol, (*rl)->vcn, (*rl)->length,
VCN alloc_vcn;
if ((from_vcn & -na->compression_block_clusters) <= (*rl)->vcn)
alloc_vcn = (*rl)->vcn;
else
alloc_vcn = from_vcn & -na->compression_block_clusters;
need = (alloc_vcn | (na->compression_block_clusters - 1))
+ 1 - alloc_vcn;
if (need > (*rl)->length) {
ntfs_log_error("Cannot allocate %lld clusters"
" within a hole of %lld\n",
(long long)need,
(long long)(*rl)->length);
errno = EIO;
goto err_out;
}
rlc = ntfs_cluster_alloc(vol, alloc_vcn, need,
lcn_seek_from, DATA_ZONE);
} else
rlc = ntfs_cluster_alloc(vol, from_vcn, need,