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Date: Mon, 30 Nov 2015 15:35:09 -0600 From: Doug Goldstein <cardoe@...doe.com> To: linux-kernel@...r.kernel.org Cc: xen-devel@...ts.xenproject.org, David Vrabel <david.vrabel@...rix.com>, Boris Ostrovsky <boris.ostrovsky@...cle.com>, Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>, Doug Goldstein <cardoe@...doe.com> Subject: [PATCH 1/2] xen: wrap xenbus on xenfs with COMPAT option Since Xen 4.6.0, using xenbus via xenfs (/proc/xen/xenbus) is deprecated and /dev/xen/xenbus via pvops is used instead. This is an effort to eventually drop this interface after a reasonable amount of time. Signed-off-by: Doug Goldstein <cardoe@...doe.com> --- drivers/xen/Kconfig | 12 ++++++++++++ drivers/xen/xenfs/super.c | 10 ++++++++-- 2 files changed, 20 insertions(+), 2 deletions(-) diff --git a/drivers/xen/Kconfig b/drivers/xen/Kconfig index 73708ac..7003984 100644 --- a/drivers/xen/Kconfig +++ b/drivers/xen/Kconfig @@ -123,6 +123,18 @@ config XEN_COMPAT_XENFS a xen platform. If in doubt, say yes. +config XEN_COMPAT_XENFS_XENBUS + bool "xenbus accessible from xenfs" + depends on XENFS + default y + help + Since Xen 4.6.0, xenstore will prefer to use the /dev/xen/xenbus + device over the "xenbus" interface on the xenfs filesystem. + Selecting this causes the kernel to include the "xenbus" + interface on the xenfs filesystem and you can safely say no for + Xen 4.6.0 and newer. + If in doubt, say yes. + config XEN_SYS_HYPERVISOR bool "Create xen entries under /sys/hypervisor" depends on SYSFS diff --git a/drivers/xen/xenfs/super.c b/drivers/xen/xenfs/super.c index 8559a71..86ff5b3 100644 --- a/drivers/xen/xenfs/super.c +++ b/drivers/xen/xenfs/super.c @@ -45,14 +45,20 @@ static const struct file_operations capabilities_file_ops = { static int xenfs_fill_super(struct super_block *sb, void *data, int silent) { static struct tree_descr xenfs_files[] = { - [2] = { "xenbus", &xen_xenbus_fops, S_IRUSR|S_IWUSR }, + [2] = +#ifdef CONFIG_XEN_COMPAT_XENFS_XENBUS + { "xenbus", &xen_xenbus_fops, S_IRUSR|S_IWUSR }, +#endif { "capabilities", &capabilities_file_ops, S_IRUGO }, { "privcmd", &xen_privcmd_fops, S_IRUSR|S_IWUSR }, {""}, }; static struct tree_descr xenfs_init_files[] = { - [2] = { "xenbus", &xen_xenbus_fops, S_IRUSR|S_IWUSR }, + [2] = +#ifdef CONFIG_XEN_COMPAT_XENFS_XENBUS + { "xenbus", &xen_xenbus_fops, S_IRUSR|S_IWUSR }, +#endif { "capabilities", &capabilities_file_ops, S_IRUGO }, { "privcmd", &xen_privcmd_fops, S_IRUSR|S_IWUSR }, { "xsd_kva", &xsd_kva_file_ops, S_IRUSR|S_IWUSR}, -- 2.4.10 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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