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ocfs2: make xattr extension work with new local alloc reservation. 

The old ocfs2_xattr_extent_allocation is too optimistic about
the clusters we can get. So actually if the file system is
too fragmented, ocfs2_add_clusters_in_btree will return us
with EGAIN and we need to allocate clusters once again.

So this patch change it to a while loop so that we can allocate
clusters until we reach clusters_to_add.

Signed-off-by: Tao Ma <tao.ma@oracle.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
Cc: stable@kernel.org
This commit is contained in:
Tao Ma 2010-07-09 14:53:11 +08:00 committed by Joel Becker
parent 0a463b74e7
commit a78f9f4668
1 changed files with 48 additions and 32 deletions
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80
fs/ocfs2/xattr.c
View File

@ -709,7 +709,7 @@ static int ocfs2_xattr_extend_allocation(struct inode *inode,
struct ocfs2_xattr_value_buf *vb,
struct ocfs2_xattr_set_ctxt *ctxt)
{
int status = 0;
int status = 0, credits;
handle_t *handle = ctxt->handle;
enum ocfs2_alloc_restarted why;
u32 prev_clusters, logical_start = le32_to_cpu(vb->vb_xv->xr_clusters);
@ -719,39 +719,55 @@ static int ocfs2_xattr_extend_allocation(struct inode *inode,
ocfs2_init_xattr_value_extent_tree(&et, INODE_CACHE(inode), vb);
status = vb->vb_access(handle, INODE_CACHE(inode), vb->vb_bh,
OCFS2_JOURNAL_ACCESS_WRITE);
if (status < 0) {
mlog_errno(status);
goto leave;
while (clusters_to_add) {
status = vb->vb_access(handle, INODE_CACHE(inode), vb->vb_bh,
OCFS2_JOURNAL_ACCESS_WRITE);
if (status < 0) {
mlog_errno(status);
break;
}
prev_clusters = le32_to_cpu(vb->vb_xv->xr_clusters);
status = ocfs2_add_clusters_in_btree(handle,
&et,
&logical_start,
clusters_to_add,
0,
ctxt->data_ac,
ctxt->meta_ac,
&why);
if ((status < 0) && (status != -EAGAIN)) {
if (status != -ENOSPC)
mlog_errno(status);
break;
}
ocfs2_journal_dirty(handle, vb->vb_bh);
clusters_to_add -= le32_to_cpu(vb->vb_xv->xr_clusters) -
prev_clusters;
if (why != RESTART_NONE && clusters_to_add) {
/*
* We can only fail in case the alloc file doesn't give
* up enough clusters.
*/
BUG_ON(why == RESTART_META);
mlog(0, "restarting xattr value extension for %u"
" clusters,.\n", clusters_to_add);
credits = ocfs2_calc_extend_credits(inode->i_sb,
&vb->vb_xv->xr_list,
clusters_to_add);
status = ocfs2_extend_trans(handle, credits);
if (status < 0) {
status = -ENOMEM;
mlog_errno(status);
break;
}
}
}
prev_clusters = le32_to_cpu(vb->vb_xv->xr_clusters);
status = ocfs2_add_clusters_in_btree(handle,
&et,
&logical_start,
clusters_to_add,
0,
ctxt->data_ac,
ctxt->meta_ac,
&why);
if (status < 0) {
mlog_errno(status);
goto leave;
}
ocfs2_journal_dirty(handle, vb->vb_bh);
clusters_to_add -= le32_to_cpu(vb->vb_xv->xr_clusters) - prev_clusters;
/*
* We should have already allocated enough space before the transaction,
* so no need to restart.
*/
BUG_ON(why != RESTART_NONE || clusters_to_add);
leave:
return status;
}