ceph: keep reserved replies on the request structure
This includes treating all the data preallocation and revokation at the same place, not having to have a special case for the reserved pages. Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net>
This commit is contained in:
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0547a9b30a
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0d59ab81c3
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@ -1985,30 +1985,30 @@ void ceph_con_revoke(struct ceph_connection *con, struct ceph_msg *msg)
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}
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/*
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* Revoke a page vector that we may be reading data into
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* Revoke a message that we may be reading data into
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*/
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void ceph_con_revoke_pages(struct ceph_connection *con, struct page **pages)
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void ceph_con_revoke_message(struct ceph_connection *con, struct ceph_msg *msg)
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{
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mutex_lock(&con->mutex);
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if (con->in_msg && con->in_msg->pages == pages) {
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if (con->in_msg && con->in_msg == msg) {
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unsigned front_len = le32_to_cpu(con->in_hdr.front_len);
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unsigned middle_len = le32_to_cpu(con->in_hdr.middle_len);
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unsigned data_len = le32_to_cpu(con->in_hdr.data_len);
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/* skip rest of message */
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dout("con_revoke_pages %p msg %p pages %p revoked\n", con,
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con->in_msg, pages);
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if (con->in_msg_pos.data_pos < data_len)
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con->in_base_pos = con->in_msg_pos.data_pos - data_len;
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else
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dout("con_revoke_pages %p msg %p revoked\n", con, msg);
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con->in_base_pos = con->in_base_pos -
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sizeof(struct ceph_msg_header) -
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front_len -
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middle_len -
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data_len -
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sizeof(struct ceph_msg_footer);
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con->in_msg->pages = NULL;
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ceph_msg_put(con->in_msg);
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con->in_msg = NULL;
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con->in_tag = CEPH_MSGR_TAG_READY;
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} else {
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dout("con_revoke_pages %p msg %p pages %p no-op\n",
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con, con->in_msg, pages);
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con, con->in_msg, msg);
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}
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mutex_unlock(&con->mutex);
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}
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@ -226,8 +226,8 @@ extern void ceph_con_open(struct ceph_connection *con,
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extern void ceph_con_close(struct ceph_connection *con);
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extern void ceph_con_send(struct ceph_connection *con, struct ceph_msg *msg);
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extern void ceph_con_revoke(struct ceph_connection *con, struct ceph_msg *msg);
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extern void ceph_con_revoke_pages(struct ceph_connection *con,
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struct page **pages);
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extern void ceph_con_revoke_message(struct ceph_connection *con,
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struct ceph_msg *msg);
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extern void ceph_con_keepalive(struct ceph_connection *con);
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extern struct ceph_connection *ceph_con_get(struct ceph_connection *con);
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extern void ceph_con_put(struct ceph_connection *con);
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@ -13,6 +13,8 @@
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#include "decode.h"
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#include "auth.h"
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#define OSD_REPLY_RESERVE_FRONT_LEN 512
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const static struct ceph_connection_operations osd_con_ops;
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static void kick_requests(struct ceph_osd_client *osdc, struct ceph_osd *osd);
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@ -73,6 +75,16 @@ static void calc_layout(struct ceph_osd_client *osdc,
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req->r_oid, req->r_oid_len, objoff, objlen, req->r_num_pages);
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}
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static void remove_replies(struct ceph_osd_request *req)
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{
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int i;
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int max = ARRAY_SIZE(req->replies);
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for (i=0; i<max; i++) {
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if (req->replies[i])
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ceph_msg_put(req->replies[i]);
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}
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}
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/*
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* requests
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@ -87,12 +99,13 @@ void ceph_osdc_release_request(struct kref *kref)
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ceph_msg_put(req->r_request);
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if (req->r_reply)
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ceph_msg_put(req->r_reply);
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if (req->r_con_filling_pages) {
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remove_replies(req);
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if (req->r_con_filling_msg) {
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dout("release_request revoking pages %p from con %p\n",
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req->r_pages, req->r_con_filling_pages);
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ceph_con_revoke_pages(req->r_con_filling_pages,
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req->r_pages);
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ceph_con_put(req->r_con_filling_pages);
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req->r_pages, req->r_con_filling_msg);
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ceph_con_revoke_message(req->r_con_filling_msg,
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req->r_reply);
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ceph_con_put(req->r_con_filling_msg);
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}
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if (req->r_own_pages)
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ceph_release_page_vector(req->r_pages,
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@ -104,6 +117,60 @@ void ceph_osdc_release_request(struct kref *kref)
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kfree(req);
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}
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static int alloc_replies(struct ceph_osd_request *req, int num_reply)
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{
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int i;
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int max = ARRAY_SIZE(req->replies);
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BUG_ON(num_reply > max);
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for (i=0; i<num_reply; i++) {
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req->replies[i] = ceph_msg_new(0, OSD_REPLY_RESERVE_FRONT_LEN, 0, 0, NULL);
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if (IS_ERR(req->replies[i])) {
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int j;
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int err = PTR_ERR(req->replies[i]);
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for (j = 0; j<=i; j++) {
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ceph_msg_put(req->replies[j]);
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}
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return err;
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}
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}
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for (; i<max; i++) {
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req->replies[i] = NULL;
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}
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req->cur_reply = 0;
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return 0;
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}
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static struct ceph_msg *__get_next_reply(struct ceph_connection *con,
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struct ceph_osd_request *req,
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int front_len)
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{
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struct ceph_msg *reply;
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if (req->r_con_filling_msg) {
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dout("revoking reply msg %p from old con %p\n", req->r_reply,
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req->r_con_filling_msg);
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ceph_con_revoke_message(req->r_con_filling_msg, req->r_reply);
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ceph_con_put(req->r_con_filling_msg);
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req->cur_reply = 0;
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}
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reply = req->replies[req->cur_reply];
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if (!reply || front_len > OSD_REPLY_RESERVE_FRONT_LEN) {
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/* maybe we can allocate it now? */
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reply = ceph_msg_new(0, front_len, 0, 0, NULL);
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if (!reply || IS_ERR(reply)) {
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pr_err(" reply alloc failed, front_len=%d\n", front_len);
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return ERR_PTR(-ENOMEM);
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}
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}
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req->r_con_filling_msg = ceph_con_get(con);
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req->r_reply = ceph_msg_get(reply); /* for duration of read over socket */
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return ceph_msg_get(reply);
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}
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/*
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* build new request AND message, calculate layout, and adjust file
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* extent as needed.
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@ -147,7 +214,7 @@ struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc,
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if (req == NULL)
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return ERR_PTR(-ENOMEM);
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err = ceph_msgpool_resv(&osdc->msgpool_op_reply, num_reply);
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err = alloc_replies(req, num_reply);
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if (err) {
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ceph_osdc_put_request(req);
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return ERR_PTR(-ENOMEM);
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@ -173,7 +240,6 @@ struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc,
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else
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msg = ceph_msg_new(CEPH_MSG_OSD_OP, msg_size, 0, 0, NULL);
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if (IS_ERR(msg)) {
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ceph_msgpool_resv(&osdc->msgpool_op_reply, -num_reply);
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ceph_osdc_put_request(req);
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return ERR_PTR(PTR_ERR(msg));
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}
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@ -471,8 +537,6 @@ static void __unregister_request(struct ceph_osd_client *osdc,
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rb_erase(&req->r_node, &osdc->requests);
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osdc->num_requests--;
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ceph_msgpool_resv(&osdc->msgpool_op_reply, -req->r_num_prealloc_reply);
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if (req->r_osd) {
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/* make sure the original request isn't in flight. */
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ceph_con_revoke(&req->r_osd->o_con, req->r_request);
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@ -724,12 +788,12 @@ static void handle_reply(struct ceph_osd_client *osdc, struct ceph_msg *msg,
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flags = le32_to_cpu(rhead->flags);
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/*
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* if this connection filled our pages, drop our reference now, to
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* if this connection filled our message, drop our reference now, to
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* avoid a (safe but slower) revoke later.
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*/
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if (req->r_con_filling_pages == con && req->r_pages == msg->pages) {
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dout(" got pages, dropping con_filling_pages ref %p\n", con);
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req->r_con_filling_pages = NULL;
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if (req->r_con_filling_msg == con && req->r_reply == msg) {
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dout(" got pages, dropping con_filling_msg ref %p\n", con);
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req->r_con_filling_msg = NULL;
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ceph_con_put(con);
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}
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@ -998,7 +1062,7 @@ bad:
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* find those pages.
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* 0 = success, -1 failure.
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*/
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static int prepare_pages(struct ceph_connection *con,
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static int __prepare_pages(struct ceph_connection *con,
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struct ceph_msg_header *hdr,
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struct ceph_osd_request *req,
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u64 tid,
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@ -1017,20 +1081,10 @@ static int prepare_pages(struct ceph_connection *con,
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osdc = osd->o_osdc;
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dout("prepare_pages on msg %p want %d\n", m, want);
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dout("prepare_pages tid %llu has %d pages, want %d\n",
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dout("__prepare_pages on msg %p tid %llu, has %d pages, want %d\n", m,
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tid, req->r_num_pages, want);
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if (unlikely(req->r_num_pages < want))
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goto out;
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if (req->r_con_filling_pages) {
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dout("revoking pages %p from old con %p\n", req->r_pages,
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req->r_con_filling_pages);
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ceph_con_revoke_pages(req->r_con_filling_pages, req->r_pages);
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ceph_con_put(req->r_con_filling_pages);
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}
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req->r_con_filling_pages = ceph_con_get(con);
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req->r_reply = ceph_msg_get(m); /* for duration of read over socket */
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m->pages = req->r_pages;
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m->nr_pages = req->r_num_pages;
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ret = 0; /* success */
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@ -1164,13 +1218,8 @@ int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client)
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err = ceph_msgpool_init(&osdc->msgpool_op, 4096, 10, true);
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if (err < 0)
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goto out_mempool;
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err = ceph_msgpool_init(&osdc->msgpool_op_reply, 512, 0, false);
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if (err < 0)
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goto out_msgpool;
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return 0;
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out_msgpool:
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ceph_msgpool_destroy(&osdc->msgpool_op);
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out_mempool:
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mempool_destroy(osdc->req_mempool);
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out:
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@ -1186,7 +1235,6 @@ void ceph_osdc_stop(struct ceph_osd_client *osdc)
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}
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mempool_destroy(osdc->req_mempool);
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ceph_msgpool_destroy(&osdc->msgpool_op);
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ceph_msgpool_destroy(&osdc->msgpool_op_reply);
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}
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/*
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@ -1323,17 +1371,17 @@ static struct ceph_msg *alloc_msg(struct ceph_connection *con,
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if (!req) {
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*skip = 1;
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m = NULL;
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dout("prepare_pages unknown tid %llu\n", tid);
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dout("alloc_msg unknown tid %llu\n", tid);
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goto out;
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}
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m = ceph_msgpool_get(&osdc->msgpool_op_reply, front);
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if (!m) {
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m = __get_next_reply(con, req, front);
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if (!m || IS_ERR(m)) {
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*skip = 1;
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goto out;
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}
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if (data_len > 0) {
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err = prepare_pages(con, hdr, req, tid, m);
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err = __prepare_pages(con, hdr, req, tid, m);
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if (err < 0) {
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*skip = 1;
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ceph_msg_put(m);
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@ -44,7 +44,7 @@ struct ceph_osd_request {
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struct ceph_osd *r_osd;
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struct ceph_pg r_pgid;
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struct ceph_connection *r_con_filling_pages;
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struct ceph_connection *r_con_filling_msg;
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struct ceph_msg *r_request, *r_reply;
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int r_result;
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@ -75,6 +75,9 @@ struct ceph_osd_request {
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struct page **r_pages; /* pages for data payload */
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int r_pages_from_pool;
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int r_own_pages; /* if true, i own page list */
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struct ceph_msg *replies[2];
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int cur_reply;
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};
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struct ceph_osd_client {
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@ -98,8 +101,7 @@ struct ceph_osd_client {
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mempool_t *req_mempool;
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struct ceph_msgpool msgpool_op;
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struct ceph_msgpool msgpool_op_reply;
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struct ceph_msgpool msgpool_op;
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};
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extern int ceph_osdc_init(struct ceph_osd_client *osdc,
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