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ceph: remove outdated frag information

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If directory fragments change, fill_inode() inserts new frags into
the fragtree, but it does not remove outdated frags from the fragtree.
This patch fixes it.

Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com>
Reviewed-by: Sage Weil <sage@inktank.com>
This commit is contained in:
Yan, Zheng 2013-09-18 09:29:07 +08:00 committed by Sage Weil
parent ffc79664d1
commit 53e879a485
1 changed files with 29 additions and 4 deletions
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33
fs/ceph/inode.c
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@ -577,6 +577,8 @@ static int fill_inode(struct inode *inode,
int issued = 0, implemented;
struct timespec mtime, atime, ctime;
u32 nsplits;
struct ceph_inode_frag *frag;
struct rb_node *rb_node;
struct ceph_buffer *xattr_blob = NULL;
int err = 0;
int queue_trunc = 0;
@ -751,15 +753,38 @@ no_change:
/* FIXME: move me up, if/when version reflects fragtree changes */
nsplits = le32_to_cpu(info->fragtree.nsplits);
mutex_lock(&ci->i_fragtree_mutex);
rb_node = rb_first(&ci->i_fragtree);
for (i = 0; i < nsplits; i++) {
u32 id = le32_to_cpu(info->fragtree.splits[i].frag);
struct ceph_inode_frag *frag = __get_or_create_frag(ci, id);
if (IS_ERR(frag))
continue;
frag = NULL;
while (rb_node) {
frag = rb_entry(rb_node, struct ceph_inode_frag, node);
if (ceph_frag_compare(frag->frag, id) >= 0) {
if (frag->frag != id)
frag = NULL;
else
rb_node = rb_next(rb_node);
break;
}
rb_node = rb_next(rb_node);
rb_erase(&frag->node, &ci->i_fragtree);
kfree(frag);
frag = NULL;
}
if (!frag) {
frag = __get_or_create_frag(ci, id);
if (IS_ERR(frag))
continue;
}
frag->split_by = le32_to_cpu(info->fragtree.splits[i].by);
dout(" frag %x split by %d\n", frag->frag, frag->split_by);
}
while (rb_node) {
frag = rb_entry(rb_node, struct ceph_inode_frag, node);
rb_node = rb_next(rb_node);
rb_erase(&frag->node, &ci->i_fragtree);
kfree(frag);
}
mutex_unlock(&ci->i_fragtree_mutex);
/* were we issued a capability? */