diff options
Diffstat (limited to 'sys/xen/xenbus/xenbus_probe_backend.c')
| -rw-r--r-- | sys/xen/xenbus/xenbus_probe_backend.c | 308 |
1 files changed, 0 insertions, 308 deletions
diff --git a/sys/xen/xenbus/xenbus_probe_backend.c b/sys/xen/xenbus/xenbus_probe_backend.c deleted file mode 100644 index 20cc49f..0000000 --- a/sys/xen/xenbus/xenbus_probe_backend.c +++ /dev/null @@ -1,308 +0,0 @@ -/****************************************************************************** - * Talks to Xen Store to figure out what devices we have (backend half). - * - * Copyright (C) 2005 Rusty Russell, IBM Corporation - * Copyright (C) 2005 Mike Wray, Hewlett-Packard - * Copyright (C) 2005, 2006 XenSource Ltd - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License version 2 - * as published by the Free Software Foundation; or, when distributed - * separately from the Linux kernel or incorporated into other - * software packages, subject to the following license: - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this source file (the "Software"), to deal in the Software without - * restriction, including without limitation the rights to use, copy, modify, - * merge, publish, distribute, sublicense, and/or sell copies of the Software, - * and to permit persons to whom the Software is furnished to do so, subject to - * the following conditions: - * - * The above copyright notice and this permission notice shall be included in - * all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE - * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING - * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS - * IN THE SOFTWARE. - */ -#if 0 -#define DPRINTK(fmt, args...) \ - printf("xenbus_probe (%s:%d) " fmt ".\n", __FUNCTION__, __LINE__, ##args) -#else -#define DPRINTK(fmt, args...) ((void)0) -#endif - -#include <sys/cdefs.h> -__FBSDID("$FreeBSD$"); - -#include <sys/param.h> -#include <sys/types.h> -#include <sys/cdefs.h> -#include <sys/time.h> -#include <sys/sema.h> -#include <sys/eventhandler.h> -#include <sys/errno.h> -#include <sys/kernel.h> -#include <sys/malloc.h> -#include <sys/module.h> -#include <sys/conf.h> -#include <sys/systm.h> -#include <sys/syslog.h> -#include <sys/proc.h> -#include <sys/bus.h> -#include <sys/sx.h> - -#include <machine/xen/xen-os.h> -#include <xen/hypervisor.h> -#include <machine/xen/xenbus.h> -#include <machine/stdarg.h> - -#include <xen/evtchn.h> -#include <xen/xenbus/xenbus_comms.h> - -#define BUG_ON PANIC_IF -#define semaphore sema -#define rw_semaphore sema -#define DEFINE_SPINLOCK(lock) struct mtx lock -#define DECLARE_MUTEX(lock) struct sema lock -#define u32 uint32_t -#define list_del(head, ent) TAILQ_REMOVE(head, ent, list) -#define simple_strtoul strtoul -#define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0])) -#define list_empty TAILQ_EMPTY - -extern struct xendev_list_head xenbus_device_backend_list; -#if 0 -static int xenbus_uevent_backend(struct device *dev, char **envp, - int num_envp, char *buffer, int buffer_size); -#endif -static int xenbus_probe_backend(const char *type, const char *domid); - -static int read_frontend_details(struct xenbus_device *xendev) -{ - return read_otherend_details(xendev, "frontend-id", "frontend"); -} - -/* backend/<type>/<fe-uuid>/<id> => <type>-<fe-domid>-<id> */ -static int backend_bus_id(char bus_id[BUS_ID_SIZE], const char *nodename) -{ - int domid, err; - const char *devid, *type, *frontend; - unsigned int typelen; - - type = strchr(nodename, '/'); - if (!type) - return -EINVAL; - type++; - typelen = strcspn(type, "/"); - if (!typelen || type[typelen] != '/') - return -EINVAL; - - devid = strrchr(nodename, '/') + 1; - - err = xenbus_gather(XBT_NIL, nodename, "frontend-id", "%i", &domid, - "frontend", NULL, &frontend, - NULL); - if (err) - return err; - if (strlen(frontend) == 0) - err = -ERANGE; - if (!err && !xenbus_exists(XBT_NIL, frontend, "")) - err = -ENOENT; - kfree(frontend); - - if (err) - return err; - - if (snprintf(bus_id, BUS_ID_SIZE, - "%.*s-%i-%s", typelen, type, domid, devid) >= BUS_ID_SIZE) - return -ENOSPC; - return 0; -} - -static struct xen_bus_type xenbus_backend = { - .root = "backend", - .levels = 3, /* backend/type/<frontend>/<id> */ - .get_bus_id = backend_bus_id, - .probe = xenbus_probe_backend, - .bus = &xenbus_device_backend_list, - -#if 0 - .error = -ENODEV, - .bus = { - .name = "xen-backend", - .match = xenbus_match, - .probe = xenbus_dev_probe, - .remove = xenbus_dev_remove, -// .shutdown = xenbus_dev_shutdown, - .uevent = xenbus_uevent_backend, - }, - .dev = { - .bus_id = "xen-backend", - }, -#endif -}; - -#if 0 -static int xenbus_uevent_backend(struct device *dev, char **envp, - int num_envp, char *buffer, int buffer_size) -{ - struct xenbus_device *xdev; - struct xenbus_driver *drv; - int i = 0; - int length = 0; - - DPRINTK(""); - - if (dev == NULL) - return -ENODEV; - - xdev = to_xenbus_device(dev); - if (xdev == NULL) - return -ENODEV; -2 - /* stuff we want to pass to /sbin/hotplug */ - add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length, - "XENBUS_TYPE=%s", xdev->devicetype); - - add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length, - "XENBUS_PATH=%s", xdev->nodename); - - add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length, - "XENBUS_BASE_PATH=%s", xenbus_backend.root); - - /* terminate, set to next free slot, shrink available space */ - envp[i] = NULL; - envp = &envp[i]; - num_envp -= i; - buffer = &buffer[length]; - buffer_size -= length; - - if (dev->driver) { - drv = to_xenbus_driver(dev->driver); - if (drv && drv->uevent) - return drv->uevent(xdev, envp, num_envp, buffer, - buffer_size); - } - - return 0; -} -#endif - -int xenbus_register_backend(struct xenbus_driver *drv) -{ - drv->read_otherend_details = read_frontend_details; - - return xenbus_register_driver_common(drv, &xenbus_backend); -} - -/* backend/<typename>/<frontend-uuid>/<name> */ -static int xenbus_probe_backend_unit(const char *dir, - const char *type, - const char *name) -{ - char *nodename; - int err; - - nodename = kasprintf("%s/%s", dir, name); - if (!nodename) - return -ENOMEM; - - DPRINTK("%s\n", nodename); - - err = xenbus_probe_node(&xenbus_backend, type, nodename); - kfree(nodename); - return err; -} - -/* backend/<typename>/<frontend-domid> */ -static int xenbus_probe_backend(const char *type, const char *domid) -{ - char *nodename; - int err = 0; - char **dir; - unsigned int i, dir_n = 0; - - DPRINTK(""); - - nodename = kasprintf("%s/%s/%s", xenbus_backend.root, type, domid); - if (!nodename) - return -ENOMEM; - - dir = xenbus_directory(XBT_NIL, nodename, "", &dir_n); - if (IS_ERR(dir)) { - kfree(nodename); - return PTR_ERR(dir); - } - - for (i = 0; i < dir_n; i++) { - err = xenbus_probe_backend_unit(nodename, type, dir[i]); - if (err) - break; - } - kfree(dir); - kfree(nodename); - return err; -} - -static void backend_changed(struct xenbus_watch *watch, - const char **vec, unsigned int len) -{ - DPRINTK(""); - - dev_changed(vec[XS_WATCH_PATH], &xenbus_backend); -} - -static struct xenbus_watch be_watch = { - .node = "backend", - .callback = backend_changed, -}; -#if 0 -void xenbus_backend_suspend(int (*fn)(struct device *, void *)) -{ - DPRINTK(""); - if (!xenbus_backend.error) - bus_for_each_dev(&xenbus_backend.bus, NULL, NULL, fn); -} - -void xenbus_backend_resume(int (*fn)(struct device *, void *)) -{ - DPRINTK(""); - if (!xenbus_backend.error) - bus_for_each_dev(&xenbus_backend.bus, NULL, NULL, fn); -} -#endif -void xenbus_backend_probe_and_watch(void) -{ - xenbus_probe_devices(&xenbus_backend); - register_xenbus_watch(&be_watch); -} - -#if 0 -void xenbus_backend_bus_register(void) -{ - xenbus_backend.error = bus_register(&xenbus_backend.bus); - if (xenbus_backend.error) - log(LOG_WARNING, - "XENBUS: Error registering backend bus: %i\n", - xenbus_backend.error); -} - -void xenbus_backend_device_register(void) -{ - if (xenbus_backend.error) - return; - - xenbus_backend.error = device_register(&xenbus_backend.dev); - if (xenbus_backend.error) { - bus_unregister(&xenbus_backend.bus); - log(LOG_WARNING, - "XENBUS: Error registering backend device: %i\n", - xenbus_backend.error); - } -} -#endif |
