From 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 Mon Sep 17 00:00:00 2001 From: Yunhong Jiang Date: Tue, 4 Aug 2015 12:17:53 -0700 Subject: Add the rt linux 4.1.3-rt3 as base Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang --- kernel/drivers/xen/xenfs/super.c | 99 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 99 insertions(+) create mode 100644 kernel/drivers/xen/xenfs/super.c (limited to 'kernel/drivers/xen/xenfs/super.c') diff --git a/kernel/drivers/xen/xenfs/super.c b/kernel/drivers/xen/xenfs/super.c new file mode 100644 index 000000000..06092e0fe --- /dev/null +++ b/kernel/drivers/xen/xenfs/super.c @@ -0,0 +1,99 @@ +/* + * xenfs.c - a filesystem for passing info between the a domain and + * the hypervisor. + * + * 2008-10-07 Alex Zeffertt Replaced /proc/xen/xenbus with xenfs filesystem + * and /proc/xen compatibility mount point. + * Turned xenfs into a loadable module. + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include +#include +#include +#include +#include + +#include + +#include "xenfs.h" +#include "../privcmd.h" +#include "../xenbus/xenbus_comms.h" + +#include + +MODULE_DESCRIPTION("Xen filesystem"); +MODULE_LICENSE("GPL"); + +static ssize_t capabilities_read(struct file *file, char __user *buf, + size_t size, loff_t *off) +{ + char *tmp = ""; + + if (xen_initial_domain()) + tmp = "control_d\n"; + + return simple_read_from_buffer(buf, size, off, tmp, strlen(tmp)); +} + +static const struct file_operations capabilities_file_ops = { + .read = capabilities_read, + .llseek = default_llseek, +}; + +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 }, + { "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 }, + { "capabilities", &capabilities_file_ops, S_IRUGO }, + { "privcmd", &xen_privcmd_fops, S_IRUSR|S_IWUSR }, + { "xsd_kva", &xsd_kva_file_ops, S_IRUSR|S_IWUSR}, + { "xsd_port", &xsd_port_file_ops, S_IRUSR|S_IWUSR}, + {""}, + }; + + return simple_fill_super(sb, XENFS_SUPER_MAGIC, + xen_initial_domain() ? xenfs_init_files : xenfs_files); +} + +static struct dentry *xenfs_mount(struct file_system_type *fs_type, + int flags, const char *dev_name, + void *data) +{ + return mount_single(fs_type, flags, data, xenfs_fill_super); +} + +static struct file_system_type xenfs_type = { + .owner = THIS_MODULE, + .name = "xenfs", + .mount = xenfs_mount, + .kill_sb = kill_litter_super, +}; +MODULE_ALIAS_FS("xenfs"); + +static int __init xenfs_init(void) +{ + if (xen_domain()) + return register_filesystem(&xenfs_type); + + pr_info("not registering filesystem on non-xen platform\n"); + return 0; +} + +static void __exit xenfs_exit(void) +{ + if (xen_domain()) + unregister_filesystem(&xenfs_type); +} + +module_init(xenfs_init); +module_exit(xenfs_exit); + -- cgit 1.2.3-korg