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ocfs2: Fix pos/len passed to ocfs2_write_cluster 

This was broken for file systems whose cluster size is greater than page
size. Pos needs to be incremented as we loop through the descriptors, and
len needs to be capped to the size of a single cluster.

Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
This commit is contained in:
Mark Fasheh 2007-09-17 09:06:29 -07:00
parent 415cb80037
commit db56246c69
1 changed files with 16 additions and 1 deletions
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17
fs/ocfs2/aops.c
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@ -1211,18 +1211,33 @@ static int ocfs2_write_cluster_by_desc(struct address_space *mapping,
loff_t pos, unsigned len)
{
int ret, i;
loff_t cluster_off;
unsigned int local_len = len;
struct ocfs2_write_cluster_desc *desc;
struct ocfs2_super *osb = OCFS2_SB(mapping->host->i_sb);
for (i = 0; i < wc->w_clen; i++) {
desc = &wc->w_desc[i];
/*
* We have to make sure that the total write passed in
* doesn't extend past a single cluster.
*/
local_len = len;
cluster_off = pos & (osb->s_clustersize - 1);
if ((cluster_off + local_len) > osb->s_clustersize)
local_len = osb->s_clustersize - cluster_off;
ret = ocfs2_write_cluster(mapping, desc->c_phys,
desc->c_unwritten, data_ac, meta_ac,
wc, desc->c_cpos, pos, len);
wc, desc->c_cpos, pos, local_len);
if (ret) {
mlog_errno(ret);
goto out;
}
len -= local_len;
pos += local_len;
}
ret = 0;