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Improved appending data to a long hole

PERMISSION_HANDLING_BRANCH
Jean-Pierre André 2011-02-08 11:45:54 +01:00
parent aabda06ffd
commit 1192e02fef
1 changed files with 20 additions and 5 deletions
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25
libntfs-3g/attrib.c
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@ -1182,12 +1182,27 @@ static int ntfs_attr_fill_zero(ntfs_attr *na, s64 pos, s64 count)
rli++;
}
size = min(end - pos, NTFS_BUF_SIZE);
written = ntfs_rl_pwrite(vol, rli, ofsi, pos, size, buf);
if (written <= 0) {
ntfs_log_perror("Failed to zero space");
goto err_free;
/*
* If the zeroed block is fully within a hole,
* we need not write anything, so advance as far
* as possible within the hole.
*/
if ((rli->lcn == (LCN)LCN_HOLE)
&& (ofsi <= pos)
&& (ofsi + (rli->length << vol->cluster_size_bits)
>= (pos + size))) {
size = min(end - pos, ofsi - pos
+ (rli->length << vol->cluster_size_bits));
pos += size;
} else {
written = ntfs_rl_pwrite(vol, rli, ofsi, pos,
size, buf);
if (written <= 0) {
ntfs_log_perror("Failed to zero space");
goto err_free;
}
pos += written;
}
pos += written;
}
ret = 0;