Send CEPH_OSD_WATCH_OP_PING every osd_keepalive_timeout for each watch
event registered. When errors are detected, look up the watch event and
send it CEPH_WATCH_EVENT_DISCONNECTED.

Signed-off-by: Douglas Fuller <[email protected]>
---
 include/linux/ceph/osd_client.h |  1 +
 net/ceph/osd_client.c           | 19 ++++++++++++++++++-
 2 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/include/linux/ceph/osd_client.h b/include/linux/ceph/osd_client.h
index 31e308b..7fbbd22 100644
--- a/include/linux/ceph/osd_client.h
+++ b/include/linux/ceph/osd_client.h
@@ -238,6 +238,7 @@ struct ceph_osd_client {
        int                    num_requests;
        struct delayed_work    timeout_work;
        struct delayed_work    osds_timeout_work;
+       struct delayed_work    linger_ping_work;
 #ifdef CONFIG_DEBUG_FS
        struct dentry          *debugfs_file;
 #endif
diff --git a/net/ceph/osd_client.c b/net/ceph/osd_client.c
index 99bac91..9a5fcae 100644
--- a/net/ceph/osd_client.c
+++ b/net/ceph/osd_client.c
@@ -110,6 +110,7 @@ static void ceph_osd_data_pages_init(struct ceph_osd_data 
*osd_data,
        osd_data->own_pages = own_pages;
 }
 
+
 static void ceph_osd_data_pagelist_init(struct ceph_osd_data *osd_data,
                        struct ceph_pagelist *pagelist)
 {
@@ -1363,6 +1364,13 @@ static void __register_linger_request(struct 
ceph_osd_client *osdc,
        dout("%s %p tid %llu\n", __func__, req, req->r_tid);
        WARN_ON(!req->r_linger);
 
+       ++req->r_ops[0].watch.gen;
+
+       if (list_empty(&osdc->req_linger))
+               schedule_delayed_work(&osdc->linger_ping_work,
+                              round_jiffies_relative(
+                                osdc->client->options->osd_keepalive_timeout));
+
        ceph_osdc_get_request(req);
        list_add_tail(&req->r_linger_item, &osdc->req_linger);
        if (req->r_osd)
@@ -1383,6 +1391,12 @@ static void __unregister_linger_request(struct 
ceph_osd_client *osdc,
 
        dout("%s %p tid %llu\n", __func__, req, req->r_tid);
        list_del_init(&req->r_linger_item);
+       if (++req->r_ops[0].watch.gen > 1 &&
+               req->r_ops[0].watch.op == CEPH_OSD_WATCH_OP_WATCH) {
+               struct timespec mtime = CURRENT_TIME;
+               req->r_ops[0].watch.op = CEPH_OSD_WATCH_OP_RECONNECT;
+               ceph_osdc_build_request(req, 0, req->r_snapc, req->r_snapid, 
&mtime);
+       }
 
        if (req->r_osd) {
                list_del_init(&req->r_linger_osd_item);
@@ -1391,6 +1405,9 @@ static void __unregister_linger_request(struct 
ceph_osd_client *osdc,
                        req->r_osd = NULL;
        }
        ceph_osdc_put_request(req);
+
+       if (list_empty(&osdc->req_linger))
+               cancel_delayed_work(&osdc->linger_ping_work);
 }
 
 void ceph_osdc_set_request_linger(struct ceph_osd_client *osdc,
@@ -1785,7 +1802,6 @@ static void handle_linger_ping(struct work_struct *work)
                              osdc->client->options->osd_keepalive_timeout);
 }
 
->>>>>>> a53afe3... changed data return type to page vector
 static int ceph_oloc_decode(void **p, void *end,
                            struct ceph_object_locator *oloc)
 {
@@ -2873,6 +2889,7 @@ int ceph_osdc_init(struct ceph_osd_client *osdc, struct 
ceph_client *client)
        osdc->num_requests = 0;
        INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout);
        INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout);
+       INIT_DELAYED_WORK(&osdc->linger_ping_work, handle_linger_ping);
        spin_lock_init(&osdc->event_lock);
        osdc->event_tree = RB_ROOT;
        osdc->event_count = 0;
-- 
1.9.3

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