- CEPH_OSD_FLAG_ACK shouldn't be set anymore, so assert on it
- remove support for handling ack replies (OSDs will send ack replies
only if clients request them)
- drop the "do lingering callbacks under osd->lock" logic from
handle_reply() -- lreq->lock is sufficient in all three cases
Signed-off-by: Ilya Dryomov <idryomov@xxxxxxxxx>
---
include/linux/ceph/osd_client.h | 6 +--
net/ceph/osd_client.c | 113 +++++++++-------------------------------
2 files changed, 27 insertions(+), 92 deletions(-)
diff --git a/include/linux/ceph/osd_client.h b/include/linux/ceph/osd_client.h
index 03a6653d329a..f2ce9cd5ede6 100644
--- a/include/linux/ceph/osd_client.h
+++ b/include/linux/ceph/osd_client.h
@@ -22,7 +22,6 @@ struct ceph_osd_client;
* completion callback for async writepages
*/
typedef void (*ceph_osdc_callback_t)(struct ceph_osd_request *);
-typedef void (*ceph_osdc_unsafe_callback_t)(struct ceph_osd_request *, bool);
#define CEPH_HOMELESS_OSD -1
@@ -170,15 +169,12 @@ struct ceph_osd_request {
unsigned int r_num_ops;
int r_result;
- bool r_got_reply;
struct ceph_osd_client *r_osdc;
struct kref r_kref;
bool r_mempool;
- struct completion r_completion;
- struct completion r_done_completion; /* fsync waiter */
+ struct completion r_completion; /* fsync waiter */
ceph_osdc_callback_t r_callback;
- ceph_osdc_unsafe_callback_t r_unsafe_callback;
struct list_head r_unsafe_item;
struct inode *r_inode; /* for use by callbacks */
diff --git a/net/ceph/osd_client.c b/net/ceph/osd_client.c
index ac4753421d0c..e1c6c2b4a295 100644
--- a/net/ceph/osd_client.c
+++ b/net/ceph/osd_client.c
@@ -460,7 +460,6 @@ static void request_init(struct ceph_osd_request *req)
kref_init(&req->r_kref);
init_completion(&req->r_completion);
- init_completion(&req->r_done_completion);
RB_CLEAR_NODE(&req->r_node);
RB_CLEAR_NODE(&req->r_mc_node);
INIT_LIST_HEAD(&req->r_unsafe_item);
@@ -1637,7 +1636,7 @@ static void __submit_request(struct ceph_osd_request *req, bool wrlocked)
bool need_send = false;
bool promoted = false;
- WARN_ON(req->r_tid || req->r_got_reply);
+ WARN_ON(req->r_tid);
dout("%s req %p wrlocked %d\n", __func__, req, wrlocked);
again:
@@ -1705,17 +1704,10 @@ static void __submit_request(struct ceph_osd_request *req, bool wrlocked)
static void account_request(struct ceph_osd_request *req)
{
- unsigned int mask = CEPH_OSD_FLAG_ACK | CEPH_OSD_FLAG_ONDISK;
+ WARN_ON(req->r_flags & CEPH_OSD_FLAG_ACK);
+ WARN_ON(!(req->r_flags & (CEPH_OSD_FLAG_READ | CEPH_OSD_FLAG_WRITE)));
- if (req->r_flags & CEPH_OSD_FLAG_READ) {
- WARN_ON(req->r_flags & mask);
- req->r_flags |= CEPH_OSD_FLAG_ACK;
- } else if (req->r_flags & CEPH_OSD_FLAG_WRITE)
- WARN_ON(!(req->r_flags & mask));
- else
- WARN_ON(1);
-
- WARN_ON(req->r_unsafe_callback && (req->r_flags & mask) != mask);
+ req->r_flags |= CEPH_OSD_FLAG_ONDISK;
atomic_inc(&req->r_osdc->num_requests);
}
@@ -1750,15 +1742,15 @@ static void finish_request(struct ceph_osd_request *req)
static void __complete_request(struct ceph_osd_request *req)
{
- if (req->r_callback)
+ if (req->r_callback) {
+ dout("%s req %p tid %llu cb %pf result %d\n", __func__, req,
+ req->r_tid, req->r_callback, req->r_result);
req->r_callback(req);
- else
- complete_all(&req->r_completion);
+ }
}
/*
- * Note that this is open-coded in handle_reply(), which has to deal
- * with ack vs commit, dup acks, etc.
+ * This is open-coded in handle_reply().
*/
static void complete_request(struct ceph_osd_request *req, int err)
{
@@ -1767,7 +1759,7 @@ static void complete_request(struct ceph_osd_request *req, int err)
req->r_result = err;
finish_request(req);
__complete_request(req);
- complete_all(&req->r_done_completion);
+ complete_all(&req->r_completion);
ceph_osdc_put_request(req);
}
@@ -1793,7 +1785,7 @@ static void cancel_request(struct ceph_osd_request *req)
cancel_map_check(req);
finish_request(req);
- complete_all(&req->r_done_completion);
+ complete_all(&req->r_completion);
ceph_osdc_put_request(req);
}
@@ -2170,7 +2162,6 @@ static void linger_commit_cb(struct ceph_osd_request *req)
mutex_lock(&lreq->lock);
dout("%s lreq %p linger_id %llu result %d\n", __func__, lreq,
lreq->linger_id, req->r_result);
- WARN_ON(!__linger_registered(lreq));
linger_reg_commit_complete(lreq, req->r_result);
lreq->committed = true;
@@ -2786,31 +2777,8 @@ static int decode_MOSDOpReply(const struct ceph_msg *msg, struct MOSDOpReply *m)
}
/*
- * We are done with @req if
- * - @m is a safe reply, or
- * - @m is an unsafe reply and we didn't want a safe one
- */
-static bool done_request(const struct ceph_osd_request *req,
- const struct MOSDOpReply *m)
-{
- return (m->result < 0 ||
- (m->flags & CEPH_OSD_FLAG_ONDISK) ||
- !(req->r_flags & CEPH_OSD_FLAG_ONDISK));
-}
-
-/*
- * handle osd op reply. either call the callback if it is specified,
- * or do the completion to wake up the waiting thread.
- *
- * ->r_unsafe_callback is set? yes no
- *
- * first reply is OK (needed r_cb/r_completion, r_cb/r_completion,
- * any or needed/got safe) r_done_completion r_done_completion
- *
- * first reply is unsafe r_unsafe_cb(true) (nothing)
- *
- * when we get the safe reply r_unsafe_cb(false), r_cb/r_completion,
- * r_done_completion r_done_completion
+ * Handle MOSDOpReply. Set ->r_result and call the callback if it is
+ * specified.
*/
static void handle_reply(struct ceph_osd *osd, struct ceph_msg *msg)
{
@@ -2819,7 +2787,6 @@ static void handle_reply(struct ceph_osd *osd, struct ceph_msg *msg)
struct MOSDOpReply m;
u64 tid = le64_to_cpu(msg->hdr.tid);
u32 data_len = 0;
- bool already_acked;
int ret;
int i;
@@ -2898,50 +2865,22 @@ static void handle_reply(struct ceph_osd *osd, struct ceph_msg *msg)
le32_to_cpu(msg->hdr.data_len), req->r_tid);
goto fail_request;
}
- dout("%s req %p tid %llu acked %d result %d data_len %u\n", __func__,
- req, req->r_tid, req->r_got_reply, m.result, data_len);
-
- already_acked = req->r_got_reply;
- if (!already_acked) {
- req->r_result = m.result ?: data_len;
- req->r_replay_version = m.replay_version; /* struct */
- req->r_got_reply = true;
- } else if (!(m.flags & CEPH_OSD_FLAG_ONDISK)) {
- dout("req %p tid %llu dup ack\n", req, req->r_tid);
- goto out_unlock_session;
- }
-
- if (done_request(req, &m)) {
- finish_request(req);
- if (req->r_linger) {
- WARN_ON(req->r_unsafe_callback);
- dout("req %p tid %llu cb (locked)\n", req, req->r_tid);
- __complete_request(req);
- }
- }
+ dout("%s req %p tid %llu result %d data_len %u\n", __func__,
+ req, req->r_tid, m.result, data_len);
+ /*
+ * Since we only ever request ONDISK, we should only ever get
+ * one (type of) reply back.
+ */
+ WARN_ON(!(m.flags & CEPH_OSD_FLAG_ONDISK));
+ req->r_result = m.result ?: data_len;
+ finish_request(req);
mutex_unlock(&osd->lock);
up_read(&osdc->lock);
- if (done_request(req, &m)) {
- if (already_acked && req->r_unsafe_callback) {
- dout("req %p tid %llu safe-cb\n", req, req->r_tid);
- req->r_unsafe_callback(req, false);
- } else if (!req->r_linger) {
- dout("req %p tid %llu cb\n", req, req->r_tid);
- __complete_request(req);
- }
- complete_all(&req->r_done_completion);
- ceph_osdc_put_request(req);
- } else {
- if (req->r_unsafe_callback) {
- dout("req %p tid %llu unsafe-cb\n", req, req->r_tid);
- req->r_unsafe_callback(req, true);
- } else {
- WARN_ON(1);
- }
- }
-
+ __complete_request(req);
+ complete_all(&req->r_completion);
+ ceph_osdc_put_request(req);
return;
fail_request:
@@ -3541,7 +3480,7 @@ void ceph_osdc_sync(struct ceph_osd_client *osdc)
up_read(&osdc->lock);
dout("%s waiting on req %p tid %llu last_tid %llu\n",
__func__, req, req->r_tid, last_tid);
- wait_for_completion(&req->r_done_completion);
+ wait_for_completion(&req->r_completion);
ceph_osdc_put_request(req);
goto again;
}
--
2.4.3
--
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