/*
* requests
*/
-void ceph_osdc_release_request(struct kref *kref)
+static void ceph_osdc_release_request(struct kref *kref)
{
- struct ceph_osd_request *req;
+ struct ceph_osd_request *req = container_of(kref,
+ struct ceph_osd_request, r_kref);
unsigned int which;
- req = container_of(kref, struct ceph_osd_request, r_kref);
+ dout("%s %p (r_request %p r_reply %p)\n", __func__, req,
+ req->r_request, req->r_reply);
+ WARN_ON(!RB_EMPTY_NODE(&req->r_node));
+ WARN_ON(!list_empty(&req->r_req_lru_item));
+ WARN_ON(!list_empty(&req->r_osd_item));
+ WARN_ON(!list_empty(&req->r_linger_item));
+ WARN_ON(!list_empty(&req->r_linger_osd_item));
+ WARN_ON(req->r_osd);
+
if (req->r_request)
ceph_msg_put(req->r_request);
if (req->r_reply) {
kmem_cache_free(ceph_osd_request_cache, req);
}
-EXPORT_SYMBOL(ceph_osdc_release_request);
+
+void ceph_osdc_get_request(struct ceph_osd_request *req)
+{
+ dout("%s %p (was %d)\n", __func__, req,
+ atomic_read(&req->r_kref.refcount));
+ kref_get(&req->r_kref);
+}
+EXPORT_SYMBOL(ceph_osdc_get_request);
+
+void ceph_osdc_put_request(struct ceph_osd_request *req)
+{
+ dout("%s %p (was %d)\n", __func__, req,
+ atomic_read(&req->r_kref.refcount));
+ kref_put(&req->r_kref, ceph_osdc_release_request);
+}
+EXPORT_SYMBOL(ceph_osdc_put_request);
struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc,
struct ceph_snap_context *snapc,
RB_CLEAR_NODE(&req->r_node);
INIT_LIST_HEAD(&req->r_unsafe_item);
INIT_LIST_HEAD(&req->r_linger_item);
- INIT_LIST_HEAD(&req->r_linger_osd);
+ INIT_LIST_HEAD(&req->r_linger_osd_item);
INIT_LIST_HEAD(&req->r_req_lru_item);
INIT_LIST_HEAD(&req->r_osd_item);
* list at the end to keep things in tid order.
*/
list_for_each_entry_safe(req, nreq, &osd->o_linger_requests,
- r_linger_osd) {
+ r_linger_osd_item) {
/*
* reregister request prior to unregistering linger so
* that r_osd is preserved.
{
dout("__remove_osd %p\n", osd);
BUG_ON(!list_empty(&osd->o_requests));
+ BUG_ON(!list_empty(&osd->o_linger_requests));
+
rb_erase(&osd->o_node, &osdc->osds);
list_del_init(&osd->o_osd_lru);
ceph_con_close(&osd->o_con);
static void __move_osd_to_lru(struct ceph_osd_client *osdc,
struct ceph_osd *osd)
{
- dout("__move_osd_to_lru %p\n", osd);
+ dout("%s %p\n", __func__, osd);
BUG_ON(!list_empty(&osd->o_osd_lru));
+
list_add_tail(&osd->o_osd_lru, &osdc->osd_lru);
osd->lru_ttl = jiffies + osdc->client->options->osd_idle_ttl * HZ;
}
+static void maybe_move_osd_to_lru(struct ceph_osd_client *osdc,
+ struct ceph_osd *osd)
+{
+ dout("%s %p\n", __func__, osd);
+
+ if (list_empty(&osd->o_requests) &&
+ list_empty(&osd->o_linger_requests))
+ __move_osd_to_lru(osdc, osd);
+}
+
static void __remove_osd_from_lru(struct ceph_osd *osd)
{
dout("__remove_osd_from_lru %p\n", osd);
dout("__unregister_request %p tid %lld\n", req, req->r_tid);
rb_erase(&req->r_node, &osdc->requests);
+ RB_CLEAR_NODE(&req->r_node);
osdc->num_requests--;
if (req->r_osd) {
ceph_msg_revoke(req->r_request);
list_del_init(&req->r_osd_item);
- if (list_empty(&req->r_osd->o_requests) &&
- list_empty(&req->r_osd->o_linger_requests)) {
- dout("moving osd to %p lru\n", req->r_osd);
- __move_osd_to_lru(osdc, req->r_osd);
- }
- if (list_empty(&req->r_linger_item))
+ maybe_move_osd_to_lru(osdc, req->r_osd);
+ if (list_empty(&req->r_linger_osd_item))
req->r_osd = NULL;
}
static void __register_linger_request(struct ceph_osd_client *osdc,
struct ceph_osd_request *req)
{
- dout("__register_linger_request %p\n", req);
+ dout("%s %p tid %llu\n", __func__, req, req->r_tid);
+ WARN_ON(!req->r_linger);
+
ceph_osdc_get_request(req);
list_add_tail(&req->r_linger_item, &osdc->req_linger);
if (req->r_osd)
- list_add_tail(&req->r_linger_osd,
+ list_add_tail(&req->r_linger_osd_item,
&req->r_osd->o_linger_requests);
}
static void __unregister_linger_request(struct ceph_osd_client *osdc,
struct ceph_osd_request *req)
{
- dout("__unregister_linger_request %p\n", req);
+ WARN_ON(!req->r_linger);
+
+ if (list_empty(&req->r_linger_item)) {
+ dout("%s %p tid %llu not registered\n", __func__, req,
+ req->r_tid);
+ return;
+ }
+
+ dout("%s %p tid %llu\n", __func__, req, req->r_tid);
list_del_init(&req->r_linger_item);
- if (req->r_osd) {
- list_del_init(&req->r_linger_osd);
- if (list_empty(&req->r_osd->o_requests) &&
- list_empty(&req->r_osd->o_linger_requests)) {
- dout("moving osd to %p lru\n", req->r_osd);
- __move_osd_to_lru(osdc, req->r_osd);
- }
+ if (req->r_osd) {
+ list_del_init(&req->r_linger_osd_item);
+ maybe_move_osd_to_lru(osdc, req->r_osd);
if (list_empty(&req->r_osd_item))
req->r_osd = NULL;
}
ceph_osdc_put_request(req);
}
-void ceph_osdc_unregister_linger_request(struct ceph_osd_client *osdc,
- struct ceph_osd_request *req)
-{
- mutex_lock(&osdc->request_mutex);
- if (req->r_linger) {
- req->r_linger = 0;
- __unregister_linger_request(osdc, req);
- }
- mutex_unlock(&osdc->request_mutex);
-}
-EXPORT_SYMBOL(ceph_osdc_unregister_linger_request);
-
void ceph_osdc_set_request_linger(struct ceph_osd_client *osdc,
struct ceph_osd_request *req)
{
&req->r_target_oid, pg_out);
}
+static void __enqueue_request(struct ceph_osd_request *req)
+{
+ struct ceph_osd_client *osdc = req->r_osdc;
+
+ dout("%s %p tid %llu to osd%d\n", __func__, req, req->r_tid,
+ req->r_osd ? req->r_osd->o_osd : -1);
+
+ if (req->r_osd) {
+ __remove_osd_from_lru(req->r_osd);
+ list_add_tail(&req->r_osd_item, &req->r_osd->o_requests);
+ list_move_tail(&req->r_req_lru_item, &osdc->req_unsent);
+ } else {
+ list_move_tail(&req->r_req_lru_item, &osdc->req_notarget);
+ }
+}
+
/*
* Pick an osd (the first 'up' osd in the pg), allocate the osd struct
* (as needed), and set the request r_osd appropriately. If there is
&osdc->osdmap->osd_addr[o]);
}
- if (req->r_osd) {
- __remove_osd_from_lru(req->r_osd);
- list_add_tail(&req->r_osd_item, &req->r_osd->o_requests);
- list_move_tail(&req->r_req_lru_item, &osdc->req_unsent);
- } else {
- list_move_tail(&req->r_req_lru_item, &osdc->req_notarget);
- }
+ __enqueue_request(req);
err = 1; /* osd or pg changed */
out:
}
EXPORT_SYMBOL(ceph_osdc_start_request);
+/*
+ * Unregister a registered request. The request is not completed (i.e.
+ * no callbacks or wakeups) - higher layers are supposed to know what
+ * they are canceling.
+ */
+void ceph_osdc_cancel_request(struct ceph_osd_request *req)
+{
+ struct ceph_osd_client *osdc = req->r_osdc;
+
+ mutex_lock(&osdc->request_mutex);
+ if (req->r_linger)
+ __unregister_linger_request(osdc, req);
+ __unregister_request(osdc, req);
+ mutex_unlock(&osdc->request_mutex);
+
+ dout("%s %p tid %llu canceled\n", __func__, req, req->r_tid);
+}
+EXPORT_SYMBOL(ceph_osdc_cancel_request);
+
/*
* wait for a request to complete
*/
{
int rc;
+ dout("%s %p tid %llu\n", __func__, req, req->r_tid);
+
rc = wait_for_completion_interruptible(&req->r_completion);
if (rc < 0) {
- mutex_lock(&osdc->request_mutex);
- __cancel_request(req);
- __unregister_request(osdc, req);
- mutex_unlock(&osdc->request_mutex);
+ dout("%s %p tid %llu interrupted\n", __func__, req, req->r_tid);
+ ceph_osdc_cancel_request(req);
complete_request(req);
- dout("wait_request tid %llu canceled/timed out\n", req->r_tid);
return rc;
}
- dout("wait_request tid %llu result %d\n", req->r_tid, req->r_result);
+ dout("%s %p tid %llu result %d\n", __func__, req, req->r_tid,
+ req->r_result);
return req->r_result;
}
EXPORT_SYMBOL(ceph_osdc_wait_request);
projects / deliverable / linux.git / blobdiff