libceph: fix pg_temp mapping update
The incremental map updates have a record for each pg_temp mapping that is
to be add/updated (len > 0) or removed (len == 0). The old code was
written as if the updates were a complete enumeration; that was just wrong.
Update the code to remove 0-length entries and drop the rbtree traversal.
This avoids misdirected (and hung) requests that manifest as server
errors like
[WRN] client4104 10.0.1.219:0/275025290 misdirected client4104.1:129 0.1 to osd0 not [1,0] in e11/11
Signed-off-by: Sage Weil <sage@newdream.net>
diff --git a/net/ceph/osdmap.c b/net/ceph/osdmap.c
index eceb8d5..fd863fe7 100644
--- a/net/ceph/osdmap.c
+++ b/net/ceph/osdmap.c
@@ -339,6 +339,7 @@
struct ceph_pg_mapping *pg = NULL;
int c;
+ dout("__insert_pg_mapping %llx %p\n", *(u64 *)&new->pgid, new);
while (*p) {
parent = *p;
pg = rb_entry(parent, struct ceph_pg_mapping, node);
@@ -366,16 +367,33 @@
while (n) {
pg = rb_entry(n, struct ceph_pg_mapping, node);
c = pgid_cmp(pgid, pg->pgid);
- if (c < 0)
+ if (c < 0) {
n = n->rb_left;
- else if (c > 0)
+ } else if (c > 0) {
n = n->rb_right;
- else
+ } else {
+ dout("__lookup_pg_mapping %llx got %p\n",
+ *(u64 *)&pgid, pg);
return pg;
+ }
}
return NULL;
}
+static int __remove_pg_mapping(struct rb_root *root, struct ceph_pg pgid)
+{
+ struct ceph_pg_mapping *pg = __lookup_pg_mapping(root, pgid);
+
+ if (pg) {
+ dout("__remove_pg_mapping %llx %p\n", *(u64 *)&pgid, pg);
+ rb_erase(&pg->node, root);
+ kfree(pg);
+ return 0;
+ }
+ dout("__remove_pg_mapping %llx dne\n", *(u64 *)&pgid);
+ return -ENOENT;
+}
+
/*
* rbtree of pg pool info
*/
@@ -711,7 +729,6 @@
void *start = *p;
int err = -EINVAL;
u16 version;
- struct rb_node *rbp;
ceph_decode_16_safe(p, end, version, bad);
if (version > CEPH_OSDMAP_INC_VERSION) {
@@ -861,7 +878,6 @@
}
/* new_pg_temp */
- rbp = rb_first(&map->pg_temp);
ceph_decode_32_safe(p, end, len, bad);
while (len--) {
struct ceph_pg_mapping *pg;
@@ -872,18 +888,6 @@
ceph_decode_copy(p, &pgid, sizeof(pgid));
pglen = ceph_decode_32(p);
- /* remove any? */
- while (rbp && pgid_cmp(rb_entry(rbp, struct ceph_pg_mapping,
- node)->pgid, pgid) <= 0) {
- struct ceph_pg_mapping *cur =
- rb_entry(rbp, struct ceph_pg_mapping, node);
-
- rbp = rb_next(rbp);
- dout(" removed pg_temp %llx\n", *(u64 *)&cur->pgid);
- rb_erase(&cur->node, &map->pg_temp);
- kfree(cur);
- }
-
if (pglen) {
/* insert */
ceph_decode_need(p, end, pglen*sizeof(u32), bad);
@@ -903,17 +907,11 @@
}
dout(" added pg_temp %llx len %d\n", *(u64 *)&pgid,
pglen);
+ } else {
+ /* remove */
+ __remove_pg_mapping(&map->pg_temp, pgid);
}
}
- while (rbp) {
- struct ceph_pg_mapping *cur =
- rb_entry(rbp, struct ceph_pg_mapping, node);
-
- rbp = rb_next(rbp);
- dout(" removed pg_temp %llx\n", *(u64 *)&cur->pgid);
- rb_erase(&cur->node, &map->pg_temp);
- kfree(cur);
- }
/* ignore the rest */
*p = end;