From: Stefano Stabellini <sstabellini@kernel.org>
To: xen-devel@lists.xen.org
Cc: linux-kernel@vger.kernel.org, sstabellini@kernel.org,
jgross@suse.com, boris.ostrovsky@oracle.com,
Stefano Stabellini <stefano@aporeto.com>
Subject: [PATCH v6 03/18] xen/pvcalls: initialize the module and register the xenbus backend
Date: Mon, 3 Jul 2017 14:08:24 -0700 [thread overview]
Message-ID: <1499116119-15638-3-git-send-email-sstabellini@kernel.org> (raw)
In-Reply-To: <1499116119-15638-1-git-send-email-sstabellini@kernel.org>
Keep a list of connected frontends. Use a semaphore to protect list
accesses.
Signed-off-by: Stefano Stabellini <stefano@aporeto.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
CC: boris.ostrovsky@oracle.com
CC: jgross@suse.com
---
drivers/xen/pvcalls-back.c | 22 ++++++++++++++++++++++
1 file changed, 22 insertions(+)
diff --git a/drivers/xen/pvcalls-back.c b/drivers/xen/pvcalls-back.c
index f3d0daa..9044cf2 100644
--- a/drivers/xen/pvcalls-back.c
+++ b/drivers/xen/pvcalls-back.c
@@ -25,6 +25,11 @@
#include <xen/xenbus.h>
#include <xen/interface/io/pvcalls.h>
+struct pvcalls_back_global {
+ struct list_head frontends;
+ struct semaphore frontends_lock;
+} pvcalls_back_global;
+
static int pvcalls_back_probe(struct xenbus_device *dev,
const struct xenbus_device_id *id)
{
@@ -59,3 +64,20 @@ static int pvcalls_back_uevent(struct xenbus_device *xdev,
.uevent = pvcalls_back_uevent,
.otherend_changed = pvcalls_back_changed,
};
+
+static int __init pvcalls_back_init(void)
+{
+ int ret;
+
+ if (!xen_domain())
+ return -ENODEV;
+
+ ret = xenbus_register_backend(&pvcalls_back_driver);
+ if (ret < 0)
+ return ret;
+
+ sema_init(&pvcalls_back_global.frontends_lock, 1);
+ INIT_LIST_HEAD(&pvcalls_back_global.frontends);
+ return 0;
+}
+module_init(pvcalls_back_init);
--
1.9.1
next prev parent reply other threads:[~2017-07-03 21:12 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-07-03 21:08 [PATCH v6 00/18] introduce the Xen PV Calls backend Stefano Stabellini
2017-07-03 21:08 ` [PATCH v6 01/18] xen: introduce the pvcalls interface header Stefano Stabellini
2017-07-03 21:08 ` [PATCH v6 02/18] xen/pvcalls: introduce the pvcalls xenbus backend Stefano Stabellini
2017-07-04 8:04 ` Juergen Gross
2017-07-03 21:08 ` Stefano Stabellini [this message]
2017-07-04 8:04 ` [PATCH v6 03/18] xen/pvcalls: initialize the module and register the " Juergen Gross
2017-07-03 21:08 ` [PATCH v6 04/18] xen/pvcalls: xenbus state handling Stefano Stabellini
2017-07-04 8:03 ` Juergen Gross
2017-07-05 20:24 ` Stefano Stabellini
2017-07-03 21:08 ` [PATCH v6 05/18] xen/pvcalls: connect to a frontend Stefano Stabellini
2017-07-04 6:59 ` Juergen Gross
2017-07-05 20:29 ` Stefano Stabellini
2017-07-03 21:08 ` [PATCH v6 06/18] xen/pvcalls: handle commands from the frontend Stefano Stabellini
2017-07-04 6:57 ` Juergen Gross
2017-07-05 20:43 ` Stefano Stabellini
2017-07-03 21:08 ` [PATCH v6 07/18] xen/pvcalls: implement socket command Stefano Stabellini
2017-07-04 7:52 ` Juergen Gross
2017-07-03 21:08 ` [PATCH v6 08/18] xen/pvcalls: implement connect command Stefano Stabellini
2017-07-04 7:14 ` Juergen Gross
2017-07-05 21:09 ` Stefano Stabellini
2017-07-03 21:08 ` [PATCH v6 09/18] xen/pvcalls: implement bind command Stefano Stabellini
2017-07-04 7:24 ` Juergen Gross
2017-07-05 21:18 ` Stefano Stabellini
2017-07-03 21:08 ` [PATCH v6 10/18] xen/pvcalls: implement listen command Stefano Stabellini
2017-07-04 7:51 ` Juergen Gross
2017-07-03 21:08 ` [PATCH v6 11/18] xen/pvcalls: implement accept command Stefano Stabellini
2017-07-04 7:26 ` Juergen Gross
2017-07-03 21:08 ` [PATCH v6 12/18] xen/pvcalls: implement poll command Stefano Stabellini
2017-07-04 7:28 ` Juergen Gross
2017-07-03 21:08 ` [PATCH v6 13/18] xen/pvcalls: implement release command Stefano Stabellini
2017-07-04 7:30 ` Juergen Gross
2017-07-03 21:08 ` [PATCH v6 14/18] xen/pvcalls: disconnect and module_exit Stefano Stabellini
2017-07-04 7:32 ` Juergen Gross
2017-07-05 21:22 ` Stefano Stabellini
2017-07-03 21:08 ` [PATCH v6 15/18] xen/pvcalls: implement the ioworker functions Stefano Stabellini
2017-07-04 7:48 ` Juergen Gross
2017-07-05 21:26 ` Stefano Stabellini
2017-07-03 21:08 ` [PATCH v6 16/18] xen/pvcalls: implement read Stefano Stabellini
2017-07-04 7:36 ` Juergen Gross
2017-07-03 21:08 ` [PATCH v6 17/18] xen/pvcalls: implement write Stefano Stabellini
2017-07-04 7:49 ` Juergen Gross
2017-07-03 21:08 ` [PATCH v6 18/18] xen: introduce a Kconfig option to enable the pvcalls backend Stefano Stabellini
2017-07-04 7:50 ` Juergen Gross
2017-07-04 8:05 ` [PATCH v6 01/18] xen: introduce the pvcalls interface header Juergen Gross
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