Messages in this thread Patch in this message |  | | From | Lukasz Skalski <> | Subject | [PATCH v2] kdbus: do not append the same connection to the queue twice | Date | Tue, 14 Apr 2015 10:24:53 +0200 |
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As it was discussed on systemd ML [1], the same connection should be queued up only once for a given well-known name.
[1] http://lists.freedesktop.org/archives/systemd-devel/2015-April/030494.html
Signed-off-by: Lukasz Skalski <l.skalski@samsung.com>
diff --git a/ipc/kdbus/names.c b/ipc/kdbus/names.c index 657008e..df99e4d 100644 --- a/ipc/kdbus/names.c +++ b/ipc/kdbus/names.c @@ -353,10 +353,24 @@ int kdbus_name_acquire(struct kdbus_name_registry *reg, } else if (flags & KDBUS_NAME_QUEUE) { /* add to waiting-queue of the name */ - ret = kdbus_name_pending_new(e, conn, flags); - if (ret >= 0) - /* tell the caller that we queued it */ - rflags |= KDBUS_NAME_IN_QUEUE; + struct kdbus_name_pending *p; + bool in_queue = false; + + list_for_each_entry(p, &e->queue, name_entry) { + if (p->conn == conn) { + /* connection is already queued */ + rflags |= KDBUS_NAME_IN_QUEUE; + in_queue = true; + break; + } + } + + if (!in_queue) { + ret = kdbus_name_pending_new(e, conn, flags); + if (ret >= 0) + /* tell the caller that we queued it */ + rflags |= KDBUS_NAME_IN_QUEUE; + } } else { /* the name is busy, return a failure */ ret = -EEXIST; -- 1.9.3
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