diff options
author | Arnd Bergmann <arnd@arndb.de> | 2020-10-27 21:12:12 +0100 |
---|---|---|
committer | Arnd Bergmann <arnd@arndb.de> | 2020-10-29 19:27:45 +0100 |
commit | f54ec58fee837ec847cb8b50593e81bfaa46107f (patch) | |
tree | 69827dbf91a0725ebb5dd9094b819dbfc3c7878b /net | |
parent | 72de7d965bc190cae317ed972babfe5eb87d7898 (diff) | |
download | linux-f54ec58fee837ec847cb8b50593e81bfaa46107f.tar.bz2 |
wimax: move out to staging
There are no known users of this driver as of October 2020, and it will
be removed unless someone turns out to still need it in future releases.
According to https://en.wikipedia.org/wiki/List_of_WiMAX_networks, there
have been many public wimax networks, but it appears that many of these
have migrated to LTE or discontinued their service altogether.
As most PCs and phones lack WiMAX hardware support, the remaining
networks tend to use standalone routers. These almost certainly
run Linux, but not a modern kernel or the mainline wimax driver stack.
NetworkManager appears to have dropped userspace support in 2015
https://bugzilla.gnome.org/show_bug.cgi?id=747846, the
www.linuxwimax.org
site had already shut down earlier.
WiMax is apparently still being deployed on airport campus networks
("AeroMACS"), but in a frequency band that was not supported by the old
Intel 2400m (used in Sandy Bridge laptops and earlier), which is the
only driver using the kernel's wimax stack.
Move all files into drivers/staging/wimax, including the uapi header
files and documentation, to make it easier to remove it when it gets
to that. Only minimal changes are made to the source files, in order
to make it possible to port patches across the move.
Also remove the MAINTAINERS entry that refers to a broken mailing
list and website.
Acked-by: Jakub Kicinski <kuba@kernel.org>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-By: Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
Acked-by: Johannes Berg <johannes@sipsolutions.net>
Suggested-by: Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'net')
-rw-r--r-- | net/Kconfig | 2 | ||||
-rw-r--r-- | net/Makefile | 1 | ||||
-rw-r--r-- | net/wimax/Kconfig | 40 | ||||
-rw-r--r-- | net/wimax/Makefile | 13 | ||||
-rw-r--r-- | net/wimax/debug-levels.h | 29 | ||||
-rw-r--r-- | net/wimax/debugfs.c | 38 | ||||
-rw-r--r-- | net/wimax/id-table.c | 130 | ||||
-rw-r--r-- | net/wimax/op-msg.c | 391 | ||||
-rw-r--r-- | net/wimax/op-reset.c | 108 | ||||
-rw-r--r-- | net/wimax/op-rfkill.c | 431 | ||||
-rw-r--r-- | net/wimax/op-state-get.c | 52 | ||||
-rw-r--r-- | net/wimax/stack.c | 616 | ||||
-rw-r--r-- | net/wimax/wimax-internal.h | 85 |
13 files changed, 0 insertions, 1936 deletions
diff --git a/net/Kconfig b/net/Kconfig index d6567162c1cf..f4c32d982af6 100644 --- a/net/Kconfig +++ b/net/Kconfig @@ -386,8 +386,6 @@ source "net/mac80211/Kconfig" endif # WIRELESS -source "net/wimax/Kconfig" - source "net/rfkill/Kconfig" source "net/9p/Kconfig" source "net/caif/Kconfig" diff --git a/net/Makefile b/net/Makefile index 5744bf1997fd..d96b0aa8f39f 100644 --- a/net/Makefile +++ b/net/Makefile @@ -66,7 +66,6 @@ obj-$(CONFIG_MAC802154) += mac802154/ ifeq ($(CONFIG_NET),y) obj-$(CONFIG_SYSCTL) += sysctl_net.o endif -obj-$(CONFIG_WIMAX) += wimax/ obj-$(CONFIG_DNS_RESOLVER) += dns_resolver/ obj-$(CONFIG_CEPH_LIB) += ceph/ obj-$(CONFIG_BATMAN_ADV) += batman-adv/ diff --git a/net/wimax/Kconfig b/net/wimax/Kconfig deleted file mode 100644 index d13762bc4abc..000000000000 --- a/net/wimax/Kconfig +++ /dev/null @@ -1,40 +0,0 @@ -# SPDX-License-Identifier: GPL-2.0-only -# -# WiMAX LAN device configuration -# - -menuconfig WIMAX - tristate "WiMAX Wireless Broadband support" - depends on RFKILL || !RFKILL - help - - Select to configure support for devices that provide - wireless broadband connectivity using the WiMAX protocol - (IEEE 802.16). - - Please note that most of these devices require signing up - for a service plan with a provider. - - The different WiMAX drivers can be enabled in the menu entry - - Device Drivers > Network device support > WiMAX Wireless - Broadband devices - - If unsure, it is safe to select M (module). - -config WIMAX_DEBUG_LEVEL - int "WiMAX debug level" - depends on WIMAX - default 8 - help - - Select the maximum debug verbosity level to be compiled into - the WiMAX stack code. - - By default, debug messages are disabled at runtime and can - be selectively enabled for different parts of the code using - the sysfs debug-levels file. - - If set at zero, this will compile out all the debug code. - - It is recommended that it is left at 8. diff --git a/net/wimax/Makefile b/net/wimax/Makefile deleted file mode 100644 index c2a71ae487ac..000000000000 --- a/net/wimax/Makefile +++ /dev/null @@ -1,13 +0,0 @@ -# SPDX-License-Identifier: GPL-2.0 - -obj-$(CONFIG_WIMAX) += wimax.o - -wimax-y := \ - id-table.o \ - op-msg.o \ - op-reset.o \ - op-rfkill.o \ - op-state-get.o \ - stack.o - -wimax-$(CONFIG_DEBUG_FS) += debugfs.o diff --git a/net/wimax/debug-levels.h b/net/wimax/debug-levels.h deleted file mode 100644 index ebc287cde336..000000000000 --- a/net/wimax/debug-levels.h +++ /dev/null @@ -1,29 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0-only */ -/* - * Linux WiMAX Stack - * Debug levels control file for the wimax module - * - * Copyright (C) 2007-2008 Intel Corporation <linux-wimax@intel.com> - * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com> - */ -#ifndef __debug_levels__h__ -#define __debug_levels__h__ - -/* Maximum compile and run time debug level for all submodules */ -#define D_MODULENAME wimax -#define D_MASTER CONFIG_WIMAX_DEBUG_LEVEL - -#include <linux/wimax/debug.h> - -/* List of all the enabled modules */ -enum d_module { - D_SUBMODULE_DECLARE(debugfs), - D_SUBMODULE_DECLARE(id_table), - D_SUBMODULE_DECLARE(op_msg), - D_SUBMODULE_DECLARE(op_reset), - D_SUBMODULE_DECLARE(op_rfkill), - D_SUBMODULE_DECLARE(op_state_get), - D_SUBMODULE_DECLARE(stack), -}; - -#endif /* #ifndef __debug_levels__h__ */ diff --git a/net/wimax/debugfs.c b/net/wimax/debugfs.c deleted file mode 100644 index 3c54bb6b925a..000000000000 --- a/net/wimax/debugfs.c +++ /dev/null @@ -1,38 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * Linux WiMAX - * Debugfs support - * - * Copyright (C) 2005-2006 Intel Corporation <linux-wimax@intel.com> - * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com> - */ -#include <linux/debugfs.h> -#include <linux/wimax.h> -#include "wimax-internal.h" - -#define D_SUBMODULE debugfs -#include "debug-levels.h" - -void wimax_debugfs_add(struct wimax_dev *wimax_dev) -{ - struct net_device *net_dev = wimax_dev->net_dev; - struct dentry *dentry; - char buf[128]; - - snprintf(buf, sizeof(buf), "wimax:%s", net_dev->name); - dentry = debugfs_create_dir(buf, NULL); - wimax_dev->debugfs_dentry = dentry; - - d_level_register_debugfs("wimax_dl_", debugfs, dentry); - d_level_register_debugfs("wimax_dl_", id_table, dentry); - d_level_register_debugfs("wimax_dl_", op_msg, dentry); - d_level_register_debugfs("wimax_dl_", op_reset, dentry); - d_level_register_debugfs("wimax_dl_", op_rfkill, dentry); - d_level_register_debugfs("wimax_dl_", op_state_get, dentry); - d_level_register_debugfs("wimax_dl_", stack, dentry); -} - -void wimax_debugfs_rm(struct wimax_dev *wimax_dev) -{ - debugfs_remove_recursive(wimax_dev->debugfs_dentry); -} diff --git a/net/wimax/id-table.c b/net/wimax/id-table.c deleted file mode 100644 index 02eee37b7e31..000000000000 --- a/net/wimax/id-table.c +++ /dev/null @@ -1,130 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * Linux WiMAX - * Mappping of generic netlink family IDs to net devices - * - * Copyright (C) 2005-2006 Intel Corporation <linux-wimax@intel.com> - * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com> - * - * We assign a single generic netlink family ID to each device (to - * simplify lookup). - * - * We need a way to map family ID to a wimax_dev pointer. - * - * The idea is to use a very simple lookup. Using a netlink attribute - * with (for example) the interface name implies a heavier search over - * all the network devices; seemed kind of a waste given that we know - * we are looking for a WiMAX device and that most systems will have - * just a single WiMAX adapter. - * - * We put all the WiMAX devices in the system in a linked list and - * match the generic link family ID against the list. - * - * By using a linked list, the case of a single adapter in the system - * becomes (almost) no overhead, while still working for many more. If - * it ever goes beyond two, I'll be surprised. - */ -#include <linux/device.h> -#include <net/genetlink.h> -#include <linux/netdevice.h> -#include <linux/list.h> -#include <linux/wimax.h> -#include "wimax-internal.h" - - -#define D_SUBMODULE id_table -#include "debug-levels.h" - - -static DEFINE_SPINLOCK(wimax_id_table_lock); -static struct list_head wimax_id_table = LIST_HEAD_INIT(wimax_id_table); - - -/* - * wimax_id_table_add - add a gennetlink familiy ID / wimax_dev mapping - * - * @wimax_dev: WiMAX device descriptor to associate to the Generic - * Netlink family ID. - * - * Look for an empty spot in the ID table; if none found, double the - * table's size and get the first spot. - */ -void wimax_id_table_add(struct wimax_dev *wimax_dev) -{ - d_fnstart(3, NULL, "(wimax_dev %p)\n", wimax_dev); - spin_lock(&wimax_id_table_lock); - list_add(&wimax_dev->id_table_node, &wimax_id_table); - spin_unlock(&wimax_id_table_lock); - d_fnend(3, NULL, "(wimax_dev %p)\n", wimax_dev); -} - - -/* - * wimax_get_netdev_by_info - lookup a wimax_dev from the gennetlink info - * - * The generic netlink family ID has been filled out in the - * nlmsghdr->nlmsg_type field, so we pull it from there, look it up in - * the mapping table and reference the wimax_dev. - * - * When done, the reference should be dropped with - * 'dev_put(wimax_dev->net_dev)'. - */ -struct wimax_dev *wimax_dev_get_by_genl_info( - struct genl_info *info, int ifindex) -{ - struct wimax_dev *wimax_dev = NULL; - - d_fnstart(3, NULL, "(info %p ifindex %d)\n", info, ifindex); - spin_lock(&wimax_id_table_lock); - list_for_each_entry(wimax_dev, &wimax_id_table, id_table_node) { - if (wimax_dev->net_dev->ifindex == ifindex) { - dev_hold(wimax_dev->net_dev); - goto found; - } - } - wimax_dev = NULL; - d_printf(1, NULL, "wimax: no devices found with ifindex %d\n", - ifindex); -found: - spin_unlock(&wimax_id_table_lock); - d_fnend(3, NULL, "(info %p ifindex %d) = %p\n", - info, ifindex, wimax_dev); - return wimax_dev; -} - - -/* - * wimax_id_table_rm - Remove a gennetlink familiy ID / wimax_dev mapping - * - * @id: family ID to remove from the table - */ -void wimax_id_table_rm(struct wimax_dev *wimax_dev) -{ - spin_lock(&wimax_id_table_lock); - list_del_init(&wimax_dev->id_table_node); - spin_unlock(&wimax_id_table_lock); -} - - -/* - * Release the gennetlink family id / mapping table - * - * On debug, verify that the table is empty upon removal. We want the - * code always compiled, to ensure it doesn't bit rot. It will be - * compiled out if CONFIG_BUG is disabled. - */ -void wimax_id_table_release(void) -{ - struct wimax_dev *wimax_dev; - -#ifndef CONFIG_BUG - return; -#endif - spin_lock(&wimax_id_table_lock); - list_for_each_entry(wimax_dev, &wimax_id_table, id_table_node) { - pr_err("BUG: %s wimax_dev %p ifindex %d not cleared\n", - __func__, wimax_dev, wimax_dev->net_dev->ifindex); - WARN_ON(1); - } - spin_unlock(&wimax_id_table_lock); -} diff --git a/net/wimax/op-msg.c b/net/wimax/op-msg.c deleted file mode 100644 index 6460b5785758..000000000000 --- a/net/wimax/op-msg.c +++ /dev/null @@ -1,391 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * Linux WiMAX - * Generic messaging interface between userspace and driver/device - * - * Copyright (C) 2007-2008 Intel Corporation <linux-wimax@intel.com> - * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com> - * - * This implements a direct communication channel between user space and - * the driver/device, by which free form messages can be sent back and - * forth. - * - * This is intended for device-specific features, vendor quirks, etc. - * - * See include/net/wimax.h - * - * GENERIC NETLINK ENCODING AND CAPACITY - * - * A destination "pipe name" is added to each message; it is up to the - * drivers to assign or use those names (if using them at all). - * - * Messages are encoded as a binary netlink attribute using nla_put() - * using type NLA_UNSPEC (as some versions of libnl still in - * deployment don't yet understand NLA_BINARY). - * - * The maximum capacity of this transport is PAGESIZE per message (so - * the actual payload will be bit smaller depending on the - * netlink/generic netlink attributes and headers). - * - * RECEPTION OF MESSAGES - * - * When a message is received from user space, it is passed verbatim - * to the driver calling wimax_dev->op_msg_from_user(). The return - * value from this function is passed back to user space as an ack - * over the generic netlink protocol. - * - * The stack doesn't do any processing or interpretation of these - * messages. - * - * SENDING MESSAGES - * - * Messages can be sent with wimax_msg(). - * - * If the message delivery needs to happen on a different context to - * that of its creation, wimax_msg_alloc() can be used to get a - * pointer to the message that can be delivered later on with - * wimax_msg_send(). - * - * ROADMAP - * - * wimax_gnl_doit_msg_from_user() Process a message from user space - * wimax_dev_get_by_genl_info() - * wimax_dev->op_msg_from_user() Delivery of message to the driver - * - * wimax_msg() Send a message to user space - * wimax_msg_alloc() - * wimax_msg_send() - */ -#include <linux/device.h> -#include <linux/slab.h> -#include <net/genetlink.h> -#include <linux/netdevice.h> -#include <linux/wimax.h> -#include <linux/security.h> -#include <linux/export.h> -#include "wimax-internal.h" - - -#define D_SUBMODULE op_msg -#include "debug-levels.h" - - -/** - * wimax_msg_alloc - Create a new skb for sending a message to userspace - * - * @wimax_dev: WiMAX device descriptor - * @pipe_name: "named pipe" the message will be sent to - * @msg: pointer to the message data to send - * @size: size of the message to send (in bytes), including the header. - * @gfp_flags: flags for memory allocation. - * - * Returns: %0 if ok, negative errno code on error - * - * Description: - * - * Allocates an skb that will contain the message to send to user - * space over the messaging pipe and initializes it, copying the - * payload. - * - * Once this call is done, you can deliver it with - * wimax_msg_send(). - * - * IMPORTANT: - * - * Don't use skb_push()/skb_pull()/skb_reserve() on the skb, as - * wimax_msg_send() depends on skb->data being placed at the - * beginning of the user message. - * - * Unlike other WiMAX stack calls, this call can be used way early, - * even before wimax_dev_add() is called, as long as the - * wimax_dev->net_dev pointer is set to point to a proper - * net_dev. This is so that drivers can use it early in case they need - * to send stuff around or communicate with user space. - */ -struct sk_buff *wimax_msg_alloc(struct wimax_dev *wimax_dev, - const char *pipe_name, - const void *msg, size_t size, - gfp_t gfp_flags) -{ - int result; - struct device *dev = wimax_dev_to_dev(wimax_dev); - size_t msg_size; - void *genl_msg; - struct sk_buff *skb; - - msg_size = nla_total_size(size) - + nla_total_size(sizeof(u32)) - + (pipe_name ? nla_total_size(strlen(pipe_name)) : 0); - result = -ENOMEM; - skb = genlmsg_new(msg_size, gfp_flags); - if (skb == NULL) - goto error_new; - genl_msg = genlmsg_put(skb, 0, 0, &wimax_gnl_family, - 0, WIMAX_GNL_OP_MSG_TO_USER); - if (genl_msg == NULL) { - dev_err(dev, "no memory to create generic netlink message\n"); - goto error_genlmsg_put; - } - result = nla_put_u32(skb, WIMAX_GNL_MSG_IFIDX, - wimax_dev->net_dev->ifindex); - if (result < 0) { - dev_err(dev, "no memory to add ifindex attribute\n"); - goto error_nla_put; - } - if (pipe_name) { - result = nla_put_string(skb, WIMAX_GNL_MSG_PIPE_NAME, - pipe_name); - if (result < 0) { - dev_err(dev, "no memory to add pipe_name attribute\n"); - goto error_nla_put; - } - } - result = nla_put(skb, WIMAX_GNL_MSG_DATA, size, msg); - if (result < 0) { - dev_err(dev, "no memory to add payload (msg %p size %zu) in " - "attribute: %d\n", msg, size, result); - goto error_nla_put; - } - genlmsg_end(skb, genl_msg); - return skb; - -error_nla_put: -error_genlmsg_put: -error_new: - nlmsg_free(skb); - return ERR_PTR(result); -} -EXPORT_SYMBOL_GPL(wimax_msg_alloc); - - -/** - * wimax_msg_data_len - Return a pointer and size of a message's payload - * - * @msg: Pointer to a message created with wimax_msg_alloc() - * @size: Pointer to where to store the message's size - * - * Returns the pointer to the message data. - */ -const void *wimax_msg_data_len(struct sk_buff *msg, size_t *size) -{ - struct nlmsghdr *nlh = (void *) msg->head; - struct nlattr *nla; - - nla = nlmsg_find_attr(nlh, sizeof(struct genlmsghdr), - WIMAX_GNL_MSG_DATA); - if (nla == NULL) { - pr_err("Cannot find attribute WIMAX_GNL_MSG_DATA\n"); - return NULL; - } - *size = nla_len(nla); - return nla_data(nla); -} -EXPORT_SYMBOL_GPL(wimax_msg_data_len); - - -/** - * wimax_msg_data - Return a pointer to a message's payload - * - * @msg: Pointer to a message created with wimax_msg_alloc() - */ -const void *wimax_msg_data(struct sk_buff *msg) -{ - struct nlmsghdr *nlh = (void *) msg->head; - struct nlattr *nla; - - nla = nlmsg_find_attr(nlh, sizeof(struct genlmsghdr), - WIMAX_GNL_MSG_DATA); - if (nla == NULL) { - pr_err("Cannot find attribute WIMAX_GNL_MSG_DATA\n"); - return NULL; - } - return nla_data(nla); -} -EXPORT_SYMBOL_GPL(wimax_msg_data); - - -/** - * wimax_msg_len - Return a message's payload length - * - * @msg: Pointer to a message created with wimax_msg_alloc() - */ -ssize_t wimax_msg_len(struct sk_buff *msg) -{ - struct nlmsghdr *nlh = (void *) msg->head; - struct nlattr *nla; - - nla = nlmsg_find_attr(nlh, sizeof(struct genlmsghdr), - WIMAX_GNL_MSG_DATA); - if (nla == NULL) { - pr_err("Cannot find attribute WIMAX_GNL_MSG_DATA\n"); - return -EINVAL; - } - return nla_len(nla); -} -EXPORT_SYMBOL_GPL(wimax_msg_len); - - -/** - * wimax_msg_send - Send a pre-allocated message to user space - * - * @wimax_dev: WiMAX device descriptor - * - * @skb: &struct sk_buff returned by wimax_msg_alloc(). Note the - * ownership of @skb is transferred to this function. - * - * Returns: 0 if ok, < 0 errno code on error - * - * Description: - * - * Sends a free-form message that was preallocated with - * wimax_msg_alloc() and filled up. - * - * Assumes that once you pass an skb to this function for sending, it - * owns it and will release it when done (on success). - * - * IMPORTANT: - * - * Don't use skb_push()/skb_pull()/skb_reserve() on the skb, as - * wimax_msg_send() depends on skb->data being placed at the - * beginning of the user message. - * - * Unlike other WiMAX stack calls, this call can be used way early, - * even before wimax_dev_add() is called, as long as the - * wimax_dev->net_dev pointer is set to point to a proper - * net_dev. This is so that drivers can use it early in case they need - * to send stuff around or communicate with user space. - */ -int wimax_msg_send(struct wimax_dev *wimax_dev, struct sk_buff *skb) -{ - struct device *dev = wimax_dev_to_dev(wimax_dev); - void *msg = skb->data; - size_t size = skb->len; - might_sleep(); - - d_printf(1, dev, "CTX: wimax msg, %zu bytes\n", size); - d_dump(2, dev, msg, size); - genlmsg_multicast(&wimax_gnl_family, skb, 0, 0, GFP_KERNEL); - d_printf(1, dev, "CTX: genl multicast done\n"); - return 0; -} -EXPORT_SYMBOL_GPL(wimax_msg_send); - - -/** - * wimax_msg - Send a message to user space - * - * @wimax_dev: WiMAX device descriptor (properly referenced) - * @pipe_name: "named pipe" the message will be sent to - * @buf: pointer to the message to send. - * @size: size of the buffer pointed to by @buf (in bytes). - * @gfp_flags: flags for memory allocation. - * - * Returns: %0 if ok, negative errno code on error. - * - * Description: - * - * Sends a free-form message to user space on the device @wimax_dev. - * - * NOTES: - * - * Once the @skb is given to this function, who will own it and will - * release it when done (unless it returns error). - */ -int wimax_msg(struct wimax_dev *wimax_dev, const char *pipe_name, - const void *buf, size_t size, gfp_t gfp_flags) -{ - int result = -ENOMEM; - struct sk_buff *skb; - - skb = wimax_msg_alloc(wimax_dev, pipe_name, buf, size, gfp_flags); - if (IS_ERR(skb)) - result = PTR_ERR(skb); - else - result = wimax_msg_send(wimax_dev, skb); - return result; -} -EXPORT_SYMBOL_GPL(wimax_msg); - -/* - * Relays a message from user space to the driver - * - * The skb is passed to the driver-specific function with the netlink - * and generic netlink headers already stripped. - * - * This call will block while handling/relaying the message. - */ -int wimax_gnl_doit_msg_from_user(struct sk_buff *skb, struct genl_info *info) -{ - int result, ifindex; - struct wimax_dev *wimax_dev; - struct device *dev; - struct nlmsghdr *nlh = info->nlhdr; - char *pipe_name; - void *msg_buf; - size_t msg_len; - - might_sleep(); - d_fnstart(3, NULL, "(skb %p info %p)\n", skb, info); - result = -ENODEV; - if (info->attrs[WIMAX_GNL_MSG_IFIDX] == NULL) { - pr_err("WIMAX_GNL_MSG_FROM_USER: can't find IFIDX attribute\n"); - goto error_no_wimax_dev; - } - ifindex = nla_get_u32(info->attrs[WIMAX_GNL_MSG_IFIDX]); - wimax_dev = wimax_dev_get_by_genl_info(info, ifindex); - if (wimax_dev == NULL) - goto error_no_wimax_dev; - dev = wimax_dev_to_dev(wimax_dev); - - /* Unpack arguments */ - result = -EINVAL; - if (info->attrs[WIMAX_GNL_MSG_DATA] == NULL) { - dev_err(dev, "WIMAX_GNL_MSG_FROM_USER: can't find MSG_DATA " - "attribute\n"); - goto error_no_data; - } - msg_buf = nla_data(info->attrs[WIMAX_GNL_MSG_DATA]); - msg_len = nla_len(info->attrs[WIMAX_GNL_MSG_DATA]); - - if (info->attrs[WIMAX_GNL_MSG_PIPE_NAME] == NULL) - pipe_name = NULL; - else { - struct nlattr *attr = info->attrs[WIMAX_GNL_MSG_PIPE_NAME]; - size_t attr_len = nla_len(attr); - /* libnl-1.1 does not yet support NLA_NUL_STRING */ - result = -ENOMEM; - pipe_name = kstrndup(nla_data(attr), attr_len + 1, GFP_KERNEL); - if (pipe_name == NULL) - goto error_alloc; - pipe_name[attr_len] = 0; - } - mutex_lock(&wimax_dev->mutex); - result = wimax_dev_is_ready(wimax_dev); - if (result == -ENOMEDIUM) - result = 0; - if (result < 0) - goto error_not_ready; - result = -ENOSYS; - if (wimax_dev->op_msg_from_user == NULL) - goto error_noop; - - d_printf(1, dev, - "CRX: nlmsghdr len %u type %u flags 0x%04x seq 0x%x pid %u\n", - nlh->nlmsg_len, nlh->nlmsg_type, nlh->nlmsg_flags, - nlh->nlmsg_seq, nlh->nlmsg_pid); - d_printf(1, dev, "CRX: wimax message %zu bytes\n", msg_len); - d_dump(2, dev, msg_buf, msg_len); - - result = wimax_dev->op_msg_from_user(wimax_dev, pipe_name, - msg_buf, msg_len, info); -error_noop: -error_not_ready: - mutex_unlock(&wimax_dev->mutex); -error_alloc: - kfree(pipe_name); -error_no_data: - dev_put(wimax_dev->net_dev); -error_no_wimax_dev: - d_fnend(3, NULL, "(skb %p info %p) = %d\n", skb, info, result); - return result; -} diff --git a/net/wimax/op-reset.c b/net/wimax/op-reset.c deleted file mode 100644 index 9899b2e56721..000000000000 --- a/net/wimax/op-reset.c +++ /dev/null @@ -1,108 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * Linux WiMAX - * Implement and export a method for resetting a WiMAX device - * - * Copyright (C) 2008 Intel Corporation <linux-wimax@intel.com> - * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com> - * - * This implements a simple synchronous call to reset a WiMAX device. - * - * Resets aim at being warm, keeping the device handles active; - * however, when that fails, it falls back to a cold reset (that will - * disconnect and reconnect the device). - */ - -#include <net/wimax.h> -#include <net/genetlink.h> -#include <linux/wimax.h> -#include <linux/security.h> -#include <linux/export.h> -#include "wimax-internal.h" - -#define D_SUBMODULE op_reset -#include "debug-levels.h" - - -/** - * wimax_reset - Reset a WiMAX device - * - * @wimax_dev: WiMAX device descriptor - * - * Returns: - * - * %0 if ok and a warm reset was done (the device still exists in - * the system). - * - * -%ENODEV if a cold/bus reset had to be done (device has - * disconnected and reconnected, so current handle is not valid - * any more). - * - * -%EINVAL if the device is not even registered. - * - * Any other negative error code shall be considered as - * non-recoverable. - * - * Description: - * - * Called when wanting to reset the device for any reason. Device is - * taken back to power on status. - * - * This call blocks; on successful return, the device has completed the - * reset process and is ready to operate. - */ -int wimax_reset(struct wimax_dev *wimax_dev) -{ - int result = -EINVAL; - struct device *dev = wimax_dev_to_dev(wimax_dev); - enum wimax_st state; - - might_sleep(); - d_fnstart(3, dev, "(wimax_dev %p)\n", wimax_dev); - mutex_lock(&wimax_dev->mutex); - dev_hold(wimax_dev->net_dev); - state = wimax_dev->state; - mutex_unlock(&wimax_dev->mutex); - - if (state >= WIMAX_ST_DOWN) { - mutex_lock(&wimax_dev->mutex_reset); - result = wimax_dev->op_reset(wimax_dev); - mutex_unlock(&wimax_dev->mutex_reset); - } - dev_put(wimax_dev->net_dev); - - d_fnend(3, dev, "(wimax_dev %p) = %d\n", wimax_dev, result); - return result; -} -EXPORT_SYMBOL(wimax_reset); - - -/* - * Exporting to user space over generic netlink - * - * Parse the reset command from user space, return error code. - * - * No attributes. - */ -int wimax_gnl_doit_reset(struct sk_buff *skb, struct genl_info *info) -{ - int result, ifindex; - struct wimax_dev *wimax_dev; - - d_fnstart(3, NULL, "(skb %p info %p)\n", skb, info); - result = -ENODEV; - if (info->attrs[WIMAX_GNL_RESET_IFIDX] == NULL) { - pr_err("WIMAX_GNL_OP_RFKILL: can't find IFIDX attribute\n"); - goto error_no_wimax_dev; - } - ifindex = nla_get_u32(info->attrs[WIMAX_GNL_RESET_IFIDX]); - wimax_dev = wimax_dev_get_by_genl_info(info, ifindex); - if (wimax_dev == NULL) - goto error_no_wimax_dev; - /* Execute the operation and send the result back to user space */ - result = wimax_reset(wimax_dev); - dev_put(wimax_dev->net_dev); -error_no_wimax_dev: - d_fnend(3, NULL, "(skb %p info %p) = %d\n", skb, info, result); - return result; -} diff --git a/net/wimax/op-rfkill.c b/net/wimax/op-rfkill.c deleted file mode 100644 index 248d10b60b05..000000000000 --- a/net/wimax/op-rfkill.c +++ /dev/null @@ -1,431 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * Linux WiMAX - * RF-kill framework integration - * - * Copyright (C) 2008 Intel Corporation <linux-wimax@intel.com> - * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com> - * - * This integrates into the Linux Kernel rfkill susbystem so that the - * drivers just have to do the bare minimal work, which is providing a - * method to set the software RF-Kill switch and to report changes in - * the software and hardware switch status. - * - * A non-polled generic rfkill device is embedded into the WiMAX - * subsystem's representation of a device. - * - * FIXME: Need polled support? Let drivers provide a poll routine - * and hand it to rfkill ops then? - * - * All device drivers have to do is after wimax_dev_init(), call - * wimax_report_rfkill_hw() and wimax_report_rfkill_sw() to update - * initial state and then every time it changes. See wimax.h:struct - * wimax_dev for more information. - * - * ROADMAP - * - * wimax_gnl_doit_rfkill() User space calling wimax_rfkill() - * wimax_rfkill() Kernel calling wimax_rfkill() - * __wimax_rf_toggle_radio() - * - * wimax_rfkill_set_radio_block() RF-Kill subsystem calling - * __wimax_rf_toggle_radio() - * - * __wimax_rf_toggle_radio() - * wimax_dev->op_rfkill_sw_toggle() Driver backend - * __wimax_state_change() - * - * wimax_report_rfkill_sw() Driver reports state change - * __wimax_state_change() - * - * wimax_report_rfkill_hw() Driver reports state change - * __wimax_state_change() - * - * wimax_rfkill_add() Initialize/shutdown rfkill support - * wimax_rfkill_rm() [called by wimax_dev_add/rm()] - */ - -#include <net/wimax.h> -#include <net/genetlink.h> -#include <linux/wimax.h> -#include <linux/security.h> -#include <linux/rfkill.h> -#include <linux/export.h> -#include "wimax-internal.h" - -#define D_SUBMODULE op_rfkill -#include "debug-levels.h" - -/** - * wimax_report_rfkill_hw - Reports changes in the hardware RF switch - * - * @wimax_dev: WiMAX device descriptor - * - * @state: New state of the RF Kill switch. %WIMAX_RF_ON radio on, - * %WIMAX_RF_OFF radio off. - * - * When the device detects a change in the state of thehardware RF - * switch, it must call this function to let the WiMAX kernel stack - * know that the state has changed so it can be properly propagated. - * - * The WiMAX stack caches the state (the driver doesn't need to). As - * well, as the change is propagated it will come back as a request to - * change the software state to mirror the hardware state. - * - * If the device doesn't have a hardware kill switch, just report - * it on initialization as always on (%WIMAX_RF_ON, radio on). - */ -void wimax_report_rfkill_hw(struct wimax_dev *wimax_dev, - enum wimax_rf_state state) -{ - int result; - struct device *dev = wimax_dev_to_dev(wimax_dev); - enum wimax_st wimax_state; - - d_fnstart(3, dev, "(wimax_dev %p state %u)\n", wimax_dev, state); - BUG_ON(state == WIMAX_RF_QUERY); - BUG_ON(state != WIMAX_RF_ON && state != WIMAX_RF_OFF); - - mutex_lock(&wimax_dev->mutex); - result = wimax_dev_is_ready(wimax_dev); - if (result < 0) - goto error_not_ready; - - if (state != wimax_dev->rf_hw) { - wimax_dev->rf_hw = state; - if (wimax_dev->rf_hw == WIMAX_RF_ON && - wimax_dev->rf_sw == WIMAX_RF_ON) - wimax_state = WIMAX_ST_READY; - else - wimax_state = WIMAX_ST_RADIO_OFF; - - result = rfkill_set_hw_state(wimax_dev->rfkill, - state == WIMAX_RF_OFF); - - __wimax_state_change(wimax_dev, wimax_state); - } -error_not_ready: - mutex_unlock(&wimax_dev->mutex); - d_fnend(3, dev, "(wimax_dev %p state %u) = void [%d]\n", - wimax_dev, state, result); -} -EXPORT_SYMBOL_GPL(wimax_report_rfkill_hw); - - -/** - * wimax_report_rfkill_sw - Reports changes in the software RF switch - * - * @wimax_dev: WiMAX device descriptor - * - * @state: New state of the RF kill switch. %WIMAX_RF_ON radio on, - * %WIMAX_RF_OFF radio off. - * - * Reports changes in the software RF switch state to the WiMAX stack. - * - * The main use is during initialization, so the driver can query the - * device for its current software radio kill switch state and feed it - * to the system. - * - * On the side, the device does not change the software state by - * itself. In practice, this can happen, as the device might decide to - * switch (in software) the radio off for different reasons. - */ -void wimax_report_rfkill_sw(struct wimax_dev *wimax_dev, - enum wimax_rf_state state) -{ - int result; - struct device *dev = wimax_dev_to_dev(wimax_dev); - enum wimax_st wimax_state; - - d_fnstart(3, dev, "(wimax_dev %p state %u)\n", wimax_dev, state); - BUG_ON(state == WIMAX_RF_QUERY); - BUG_ON(state != WIMAX_RF_ON && state != WIMAX_RF_OFF); - - mutex_lock(&wimax_dev->mutex); - result = wimax_dev_is_ready(wimax_dev); - if (result < 0) - goto error_not_ready; - - if (state != wimax_dev->rf_sw) { - wimax_dev->rf_sw = state; - if (wimax_dev->rf_hw == WIMAX_RF_ON && - wimax_dev->rf_sw == WIMAX_RF_ON) - wimax_state = WIMAX_ST_READY; - else - wimax_state = WIMAX_ST_RADIO_OFF; - __wimax_state_change(wimax_dev, wimax_state); - rfkill_set_sw_state(wimax_dev->rfkill, state == WIMAX_RF_OFF); - } -error_not_ready: - mutex_unlock(&wimax_dev->mutex); - d_fnend(3, dev, "(wimax_dev %p state %u) = void [%d]\n", - wimax_dev, state, result); -} -EXPORT_SYMBOL_GPL(wimax_report_rfkill_sw); - - -/* - * Callback for the RF Kill toggle operation - * - * This function is called by: - * - * - The rfkill subsystem when the RF-Kill key is pressed in the - * hardware and the driver notifies through - * wimax_report_rfkill_hw(). The rfkill subsystem ends up calling back - * here so the software RF Kill switch state is changed to reflect - * the hardware switch state. - * - * - When the user sets the state through sysfs' rfkill/state file - * - * - When the user calls wimax_rfkill(). - * - * This call blocks! - * - * WARNING! When we call rfkill_unregister(), this will be called with - * state 0! - * - * WARNING: wimax_dev must be locked - */ -static -int __wimax_rf_toggle_radio(struct wimax_dev *wimax_dev, - enum wimax_rf_state state) -{ - int result = 0; - struct device *dev = wimax_dev_to_dev(wimax_dev); - enum wimax_st wimax_state; - - might_sleep(); - d_fnstart(3, dev, "(wimax_dev %p state %u)\n", wimax_dev, state); - if (wimax_dev->rf_sw == state) - goto out_no_change; - if (wimax_dev->op_rfkill_sw_toggle != NULL) - result = wimax_dev->op_rfkill_sw_toggle(wimax_dev, state); - else if (state == WIMAX_RF_OFF) /* No op? can't turn off */ - result = -ENXIO; - else /* No op? can turn on */ - result = 0; /* should never happen tho */ - if (result >= 0) { - result = 0; - wimax_dev->rf_sw = state; - wimax_state = state == WIMAX_RF_ON ? - WIMAX_ST_READY : WIMAX_ST_RADIO_OFF; - __wimax_state_change(wimax_dev, wimax_state); - } -out_no_change: - d_fnend(3, dev, "(wimax_dev %p state %u) = %d\n", - wimax_dev, state, result); - return result; -} - - -/* - * Translate from rfkill state to wimax state - * - * NOTE: Special state handling rules here - * - * Just pretend the call didn't happen if we are in a state where - * we know for sure it cannot be handled (WIMAX_ST_DOWN or - * __WIMAX_ST_QUIESCING). rfkill() needs it to register and - * unregister, as it will run this path. - * - * NOTE: This call will block until the operation is completed. - */ -static int wimax_rfkill_set_radio_block(void *data, bool blocked) -{ - int result; - struct wimax_dev *wimax_dev = data; - struct device *dev = wimax_dev_to_dev(wimax_dev); - enum wimax_rf_state rf_state; - - d_fnstart(3, dev, "(wimax_dev %p blocked %u)\n", wimax_dev, blocked); - rf_state = WIMAX_RF_ON; - if (blocked) - rf_state = WIMAX_RF_OFF; - mutex_lock(&wimax_dev->mutex); - if (wimax_dev->state <= __WIMAX_ST_QUIESCING) - result = 0; - else - result = __wimax_rf_toggle_radio(wimax_dev, rf_state); - mutex_unlock(&wimax_dev->mutex); - d_fnend(3, dev, "(wimax_dev %p blocked %u) = %d\n", - wimax_dev, blocked, result); - return result; -} - -static const struct rfkill_ops wimax_rfkill_ops = { - .set_block = wimax_rfkill_set_radio_block, -}; - -/** - * wimax_rfkill - Set the software RF switch state for a WiMAX device - * - * @wimax_dev: WiMAX device descriptor - * - * @state: New RF state. - * - * Returns: - * - * >= 0 toggle state if ok, < 0 errno code on error. The toggle state - * is returned as a bitmap, bit 0 being the hardware RF state, bit 1 - * the software RF state. - * - * 0 means disabled (%WIMAX_RF_ON, radio on), 1 means enabled radio - * off (%WIMAX_RF_OFF). - * - * Description: - * - * Called by the user when he wants to request the WiMAX radio to be - * switched on (%WIMAX_RF_ON) or off (%WIMAX_RF_OFF). With - * %WIMAX_RF_QUERY, just the current state is returned. - * - * NOTE: - * - * This call will block until the operation is complete. - */ -int wimax_rfkill(struct wimax_dev *wimax_dev, enum wimax_rf_state state) -{ - int result; - struct device *dev = wimax_dev_to_dev(wimax_dev); - - d_fnstart(3, dev, "(wimax_dev %p state %u)\n", wimax_dev, state); - mutex_lock(&wimax_dev->mutex); - result = wimax_dev_is_ready(wimax_dev); - if (result < 0) { - /* While initializing, < 1.4.3 wimax-tools versions use - * this call to check if the device is a valid WiMAX - * device; so we allow it to proceed always, - * considering the radios are all off. */ - if (result == -ENOMEDIUM && state == WIMAX_RF_QUERY) - result = WIMAX_RF_OFF << 1 | WIMAX_RF_OFF; - goto error_not_ready; - } - switch (state) { - case WIMAX_RF_ON: - case WIMAX_RF_OFF: - result = __wimax_rf_toggle_radio(wimax_dev, state); - if (result < 0) - goto error; - rfkill_set_sw_state(wimax_dev->rfkill, state == WIMAX_RF_OFF); - break; - case WIMAX_RF_QUERY: - break; - default: - result = -EINVAL; - goto error; - } - result = wimax_dev->rf_sw << 1 | wimax_dev->rf_hw; -error: -error_not_ready: - mutex_unlock(&wimax_dev->mutex); - d_fnend(3, dev, "(wimax_dev %p state %u) = %d\n", - wimax_dev, state, result); - return result; -} -EXPORT_SYMBOL(wimax_rfkill); - - -/* - * Register a new WiMAX device's RF Kill support - * - * WARNING: wimax_dev->mutex must be unlocked - */ -int wimax_rfkill_add(struct wimax_dev *wimax_dev) -{ - int result; - struct rfkill *rfkill; - struct device *dev = wimax_dev_to_dev(wimax_dev); - - d_fnstart(3, dev, "(wimax_dev %p)\n", wimax_dev); - /* Initialize RF Kill */ - result = -ENOMEM; - rfkill = rfkill_alloc(wimax_dev->name, dev, RFKILL_TYPE_WIMAX, - &wimax_rfkill_ops, wimax_dev); - if (rfkill == NULL) - goto error_rfkill_allocate; - - d_printf(1, dev, "rfkill %p\n", rfkill); - - wimax_dev->rfkill = rfkill; - - rfkill_init_sw_state(rfkill, 1); - result = rfkill_register(wimax_dev->rfkill); - if (result < 0) - goto error_rfkill_register; - - /* If there is no SW toggle op, SW RFKill is always on */ - if (wimax_dev->op_rfkill_sw_toggle == NULL) - wimax_dev->rf_sw = WIMAX_RF_ON; - - d_fnend(3, dev, "(wimax_dev %p) = 0\n", wimax_dev); - return 0; - -error_rfkill_register: - rfkill_destroy(wimax_dev->rfkill); -error_rfkill_allocate: - d_fnend(3, dev, "(wimax_dev %p) = %d\n", wimax_dev, result); - return result; -} - - -/* - * Deregister a WiMAX device's RF Kill support - * - * Ick, we can't call rfkill_free() after rfkill_unregister()...oh - * well. - * - * WARNING: wimax_dev->mutex must be unlocked - */ -void wimax_rfkill_rm(struct wimax_dev *wimax_dev) -{ - struct device *dev = wimax_dev_to_dev(wimax_dev); - d_fnstart(3, dev, "(wimax_dev %p)\n", wimax_dev); - rfkill_unregister(wimax_dev->rfkill); - rfkill_destroy(wimax_dev->rfkill); - d_fnend(3, dev, "(wimax_dev %p)\n", wimax_dev); -} - - -/* - * Exporting to user space over generic netlink - * - * Parse the rfkill command from user space, return a combination - * value that describe the states of the different toggles. - * - * Only one attribute: the new state requested (on, off or no change, - * just query). - */ - -int wimax_gnl_doit_rfkill(struct sk_buff *skb, struct genl_info *info) -{ - int result, ifindex; - struct wimax_dev *wimax_dev; - struct device *dev; - enum wimax_rf_state new_state; - - d_fnstart(3, NULL, "(skb %p info %p)\n", skb, info); - result = -ENODEV; - if (info->attrs[WIMAX_GNL_RFKILL_IFIDX] == NULL) { - pr_err("WIMAX_GNL_OP_RFKILL: can't find IFIDX attribute\n"); - goto error_no_wimax_dev; - } - ifindex = nla_get_u32(info->attrs[WIMAX_GNL_RFKILL_IFIDX]); - wimax_dev = wimax_dev_get_by_genl_info(info, ifindex); - if (wimax_dev == NULL) - goto error_no_wimax_dev; - dev = wimax_dev_to_dev(wimax_dev); - result = -EINVAL; - if (info->attrs[WIMAX_GNL_RFKILL_STATE] == NULL) { - dev_err(dev, "WIMAX_GNL_RFKILL: can't find RFKILL_STATE " - "attribute\n"); - goto error_no_pid; - } - new_state = nla_get_u32(info->attrs[WIMAX_GNL_RFKILL_STATE]); - - /* Execute the operation and send the result back to user space */ - result = wimax_rfkill(wimax_dev, new_state); -error_no_pid: - dev_put(wimax_dev->net_dev); -error_no_wimax_dev: - d_fnend(3, NULL, "(skb %p info %p) = %d\n", skb, info, result); - return result; -} diff --git a/net/wimax/op-state-get.c b/net/wimax/op-state-get.c deleted file mode 100644 index 5bc712de1563..000000000000 --- a/net/wimax/op-state-get.c +++ /dev/null @@ -1,52 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * Linux WiMAX - * Implement and export a method for getting a WiMAX device current state - * - * Copyright (C) 2009 Paulius Zaleckas <paulius.zaleckas@teltonika.lt> - * - * Based on previous WiMAX core work by: - * Copyright (C) 2008 Intel Corporation <linux-wimax@intel.com> - * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com> - */ - -#include <net/wimax.h> -#include <net/genetlink.h> -#include <linux/wimax.h> -#include <linux/security.h> -#include "wimax-internal.h" - -#define D_SUBMODULE op_state_get -#include "debug-levels.h" - - -/* - * Exporting to user space over generic netlink - * - * Parse the state get command from user space, return a combination - * value that describe the current state. - * - * No attributes. - */ -int wimax_gnl_doit_state_get(struct sk_buff *skb, struct genl_info *info) -{ - int result, ifindex; - struct wimax_dev *wimax_dev; - - d_fnstart(3, NULL, "(skb %p info %p)\n", skb, info); - result = -ENODEV; - if (info->attrs[WIMAX_GNL_STGET_IFIDX] == NULL) { - pr_err("WIMAX_GNL_OP_STATE_GET: can't find IFIDX attribute\n"); - goto error_no_wimax_dev; - } - ifindex = nla_get_u32(info->attrs[WIMAX_GNL_STGET_IFIDX]); - wimax_dev = wimax_dev_get_by_genl_info(info, ifindex); - if (wimax_dev == NULL) - goto error_no_wimax_dev; - /* Execute the operation and send the result back to user space */ - result = wimax_state_get(wimax_dev); - dev_put(wimax_dev->net_dev); -error_no_wimax_dev: - d_fnend(3, NULL, "(skb %p info %p) = %d\n", skb, info, result); - return result; -} diff --git a/net/wimax/stack.c b/net/wimax/stack.c deleted file mode 100644 index 3a62af3f80bf..000000000000 --- a/net/wimax/stack.c +++ /dev/null @@ -1,616 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * Linux WiMAX - * Initialization, addition and removal of wimax devices - * - * Copyright (C) 2005-2006 Intel Corporation <linux-wimax@intel.com> - * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com> - * - * This implements: - * - * - basic life cycle of 'struct wimax_dev' [wimax_dev_*()]; on - * addition/registration initialize all subfields and allocate - * generic netlink resources for user space communication. On - * removal/unregistration, undo all that. - * - * - device state machine [wimax_state_change()] and support to send - * reports to user space when the state changes - * [wimax_gnl_re_state_change*()]. - * - * See include/net/wimax.h for rationales and design. - * - * ROADMAP - * - * [__]wimax_state_change() Called by drivers to update device's state - * wimax_gnl_re_state_change_alloc() - * wimax_gnl_re_state_change_send() - * - * wimax_dev_init() Init a device - * wimax_dev_add() Register - * wimax_rfkill_add() - * wimax_gnl_add() Register all the generic netlink resources. - * wimax_id_table_add() - * wimax_dev_rm() Unregister - * wimax_id_table_rm() - * wimax_gnl_rm() - * wimax_rfkill_rm() - */ -#include <linux/device.h> -#include <linux/gfp.h> -#include <net/genetlink.h> -#include <linux/netdevice.h> -#include <linux/wimax.h> -#include <linux/module.h> -#include "wimax-internal.h" - - -#define D_SUBMODULE stack -#include "debug-levels.h" - -static char wimax_debug_params[128]; -module_param_string(debug, wimax_debug_params, sizeof(wimax_debug_params), - 0644); -MODULE_PARM_DESC(debug, - "String of space-separated NAME:VALUE pairs, where NAMEs " - "are the different debug submodules and VALUE are the " - "initial debug value to set."); - -/* - * Authoritative source for the RE_STATE_CHANGE attribute policy - * - * We don't really use it here, but /me likes to keep the definition - * close to where the data is generated. - */ -/* -static const struct nla_policy wimax_gnl_re_status_change[WIMAX_GNL_ATTR_MAX + 1] = { - [WIMAX_GNL_STCH_STATE_OLD] = { .type = NLA_U8 }, - [WIMAX_GNL_STCH_STATE_NEW] = { .type = NLA_U8 }, -}; -*/ - - -/* - * Allocate a Report State Change message - * - * @header: save it, you need it for _send() - * - * Creates and fills a basic state change message; different code - * paths can then add more attributes to the message as needed. - * - * Use wimax_gnl_re_state_change_send() to send the returned skb. - * - * Returns: skb with the genl message if ok, IS_ERR() ptr on error - * with an errno code. - */ -static -struct sk_buff *wimax_gnl_re_state_change_alloc( - struct wimax_dev *wimax_dev, - enum wimax_st new_state, enum wimax_st old_state, - void **header) -{ - int result; - struct device *dev = wimax_dev_to_dev(wimax_dev); - void *data; - struct sk_buff *report_skb; - - d_fnstart(3, dev, "(wimax_dev %p new_state %u old_state %u)\n", - wimax_dev, new_state, old_state); - result = -ENOMEM; - report_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); - if (report_skb == NULL) { - dev_err(dev, "RE_STCH: can't create message\n"); - goto error_new; - } - /* FIXME: sending a group ID as the seq is wrong */ - data = genlmsg_put(report_skb, 0, wimax_gnl_family.mcgrp_offset, - &wimax_gnl_family, 0, WIMAX_GNL_RE_STATE_CHANGE); - if (data == NULL) { - dev_err(dev, "RE_STCH: can't put data into message\n"); - goto error_put; - } - *header = data; - - result = nla_put_u8(report_skb, WIMAX_GNL_STCH_STATE_OLD, old_state); - if (result < 0) { - dev_err(dev, "RE_STCH: Error adding OLD attr: %d\n", result); - goto error_put; - } - result = nla_put_u8(report_skb, WIMAX_GNL_STCH_STATE_NEW, new_state); - if (result < 0) { - dev_err(dev, "RE_STCH: Error adding NEW attr: %d\n", result); - goto error_put; - } - result = nla_put_u32(report_skb, WIMAX_GNL_STCH_IFIDX, - wimax_dev->net_dev->ifindex); - if (result < 0) { - dev_err(dev, "RE_STCH: Error adding IFINDEX attribute\n"); - goto error_put; - } - d_fnend(3, dev, "(wimax_dev %p new_state %u old_state %u) = %p\n", - wimax_dev, new_state, old_state, report_skb); - return report_skb; - -error_put: - nlmsg_free(report_skb); -error_new: - d_fnend(3, dev, "(wimax_dev %p new_state %u old_state %u) = %d\n", - wimax_dev, new_state, old_state, result); - return ERR_PTR(result); -} - - -/* - * Send a Report State Change message (as created with _alloc). - * - * @report_skb: as returned by wimax_gnl_re_state_change_alloc() - * @header: as returned by wimax_gnl_re_state_change_alloc() - * - * Returns: 0 if ok, < 0 errno code on error. - * - * If the message is NULL, pretend it didn't happen. - */ -static -int wimax_gnl_re_state_change_send( - struct wimax_dev *wimax_dev, struct sk_buff *report_skb, - void *header) -{ - int result = 0; - struct device *dev = wimax_dev_to_dev(wimax_dev); - d_fnstart(3, dev, "(wimax_dev %p report_skb %p)\n", - wimax_dev, report_skb); - if (report_skb == NULL) { - result = -ENOMEM; - goto out; - } - genlmsg_end(report_skb, header); - genlmsg_multicast(&wimax_gnl_family, report_skb, 0, 0, GFP_KERNEL); -out: - d_fnend(3, dev, "(wimax_dev %p report_skb %p) = %d\n", - wimax_dev, report_skb, result); - return result; -} - - -static -void __check_new_state(enum wimax_st old_state, enum wimax_st new_state, - unsigned int allowed_states_bm) -{ - if (WARN_ON(((1 << new_state) & allowed_states_bm) == 0)) { - pr_err("SW BUG! Forbidden state change %u -> %u\n", - old_state, new_state); - } -} - - -/* - * Set the current state of a WiMAX device [unlocking version of - * wimax_state_change(). - */ -void __wimax_state_change(struct wimax_dev *wimax_dev, enum wimax_st new_state) -{ - struct device *dev = wimax_dev_to_dev(wimax_dev); - enum wimax_st old_state = wimax_dev->state; - struct sk_buff *stch_skb; - void *header; - - d_fnstart(3, dev, "(wimax_dev %p new_state %u [old %u])\n", - wimax_dev, new_state, old_state); - - if (WARN_ON(new_state >= __WIMAX_ST_INVALID)) { - dev_err(dev, "SW BUG: requesting invalid state %u\n", - new_state); - goto out; - } - if (old_state == new_state) - goto out; - header = NULL; /* gcc complains? can't grok why */ - stch_skb = wimax_gnl_re_state_change_alloc( - wimax_dev, new_state, old_state, &header); - - /* Verify the state transition and do exit-from-state actions */ - switch (old_state) { - case __WIMAX_ST_NULL: - __check_new_state(old_state, new_state, - 1 << WIMAX_ST_DOWN); - break; - case WIMAX_ST_DOWN: - __check_new_state(old_state, new_state, - 1 << __WIMAX_ST_QUIESCING - | 1 << WIMAX_ST_UNINITIALIZED - | 1 << WIMAX_ST_RADIO_OFF); - break; - case __WIMAX_ST_QUIESCING: - __check_new_state(old_state, new_state, 1 << WIMAX_ST_DOWN); - break; - case WIMAX_ST_UNINITIALIZED: - __check_new_state(old_state, new_state, - 1 << __WIMAX_ST_QUIESCING - | 1 << WIMAX_ST_RADIO_OFF); - break; - case WIMAX_ST_RADIO_OFF: - __check_new_state(old_state, new_state, - 1 << __WIMAX_ST_QUIESCING - | 1 << WIMAX_ST_READY); - break; - case WIMAX_ST_READY: - __check_new_state(old_state, new_state, - 1 << __WIMAX_ST_QUIESCING - | 1 << WIMAX_ST_RADIO_OFF - | 1 << WIMAX_ST_SCANNING - | 1 << WIMAX_ST_CONNECTING - | 1 << WIMAX_ST_CONNECTED); - break; - case WIMAX_ST_SCANNING: - __check_new_state(old_state, new_state, - 1 << __WIMAX_ST_QUIESCING - | 1 << WIMAX_ST_RADIO_OFF - | 1 << WIMAX_ST_READY - | 1 << WIMAX_ST_CONNECTING - | 1 << WIMAX_ST_CONNECTED); - break; - case WIMAX_ST_CONNECTING: - __check_new_state(old_state, new_state, - 1 << __WIMAX_ST_QUIESCING - | 1 << WIMAX_ST_RADIO_OFF - | 1 << WIMAX_ST_READY - | 1 << WIMAX_ST_SCANNING - | 1 << WIMAX_ST_CONNECTED); - break; - case WIMAX_ST_CONNECTED: - __check_new_state(old_state, new_state, - 1 << __WIMAX_ST_QUIESCING - | 1 << WIMAX_ST_RADIO_OFF - | 1 << WIMAX_ST_READY); - netif_tx_disable(wimax_dev->net_dev); - netif_carrier_off(wimax_dev->net_dev); - break; - case __WIMAX_ST_INVALID: - default: - dev_err(dev, "SW BUG: wimax_dev %p is in unknown state %u\n", - wimax_dev, wimax_dev->state); - WARN_ON(1); - goto out; - } - - /* Execute the actions of entry to the new state */ - switch (new_state) { - case __WIMAX_ST_NULL: - dev_err(dev, "SW BUG: wimax_dev %p entering NULL state " - "from %u\n", wimax_dev, wimax_dev->state); - WARN_ON(1); /* Nobody can enter this state */ - break; - case WIMAX_ST_DOWN: - break; - case __WIMAX_ST_QUIESCING: - break; - case WIMAX_ST_UNINITIALIZED: - break; - case WIMAX_ST_RADIO_OFF: - break; - case WIMAX_ST_READY: - break; - case WIMAX_ST_SCANNING: - break; - case WIMAX_ST_CONNECTING: - break; - case WIMAX_ST_CONNECTED: - netif_carrier_on(wimax_dev->net_dev); - netif_wake_queue(wimax_dev->net_dev); - break; - case __WIMAX_ST_INVALID: - default: - BUG(); - } - __wimax_state_set(wimax_dev, new_state); - if (!IS_ERR(stch_skb)) - wimax_gnl_re_state_change_send(wimax_dev, stch_skb, header); -out: - d_fnend(3, dev, "(wimax_dev %p new_state %u [old %u]) = void\n", - wimax_dev, new_state, old_state); -} - - -/** - * wimax_state_change - Set the current state of a WiMAX device - * - * @wimax_dev: WiMAX device descriptor (properly referenced) - * @new_state: New state to switch to - * - * This implements the state changes for the wimax devices. It will - * - * - verify that the state transition is legal (for now it'll just - * print a warning if not) according to the table in - * linux/wimax.h's documentation for 'enum wimax_st'. - * - * - perform the actions needed for leaving the current state and - * whichever are needed for entering the new state. - * - * - issue a report to user space indicating the new state (and an - * optional payload with information about the new state). - * - * NOTE: @wimax_dev must be locked - */ -void wimax_state_change(struct wimax_dev *wimax_dev, enum wimax_st new_state) -{ - /* - * A driver cannot take the wimax_dev out of the - * __WIMAX_ST_NULL state unless by calling wimax_dev_add(). If - * the wimax_dev's state is still NULL, we ignore any request - * to change its state because it means it hasn't been yet - * registered. - * - * There is no need to complain about it, as routines that - * call this might be shared from different code paths that - * are called before or after wimax_dev_add() has done its - * job. - */ - mutex_lock(&wimax_dev->mutex); - if (wimax_dev->state > __WIMAX_ST_NULL) - __wimax_state_change(wimax_dev, new_state); - mutex_unlock(&wimax_dev->mutex); -} -EXPORT_SYMBOL_GPL(wimax_state_change); - - -/** - * wimax_state_get() - Return the current state of a WiMAX device - * - * @wimax_dev: WiMAX device descriptor - * - * Returns: Current state of the device according to its driver. - */ -enum wimax_st wimax_state_get(struct wimax_dev *wimax_dev) -{ - enum wimax_st state; - mutex_lock(&wimax_dev->mutex); - state = wimax_dev->state; - mutex_unlock(&wimax_dev->mutex); - return state; -} -EXPORT_SYMBOL_GPL(wimax_state_get); - - -/** - * wimax_dev_init - initialize a newly allocated instance - * - * @wimax_dev: WiMAX device descriptor to initialize. - * - * Initializes fields of a freshly allocated @wimax_dev instance. This - * function assumes that after allocation, the memory occupied by - * @wimax_dev was zeroed. - */ -void wimax_dev_init(struct wimax_dev *wimax_dev) -{ - INIT_LIST_HEAD(&wimax_dev->id_table_node); - __wimax_state_set(wimax_dev, __WIMAX_ST_NULL); - mutex_init(&wimax_dev->mutex); - mutex_init(&wimax_dev->mutex_reset); -} -EXPORT_SYMBOL_GPL(wimax_dev_init); - -/* - * There are multiple enums reusing the same values, adding - * others is only possible if they use a compatible policy. - */ -static const struct nla_policy wimax_gnl_policy[WIMAX_GNL_ATTR_MAX + 1] = { - /* - * WIMAX_GNL_RESET_IFIDX, WIMAX_GNL_RFKILL_IFIDX, - * WIMAX_GNL_STGET_IFIDX, WIMAX_GNL_MSG_IFIDX - */ - [1] = { .type = NLA_U32, }, - /* - * WIMAX_GNL_RFKILL_STATE, WIMAX_GNL_MSG_PIPE_NAME - */ - [2] = { .type = NLA_U32, }, /* enum wimax_rf_state */ - /* - * WIMAX_GNL_MSG_DATA - */ - [3] = { .type = NLA_UNSPEC, }, /* libnl doesn't grok BINARY yet */ -}; - -static const struct genl_small_ops wimax_gnl_ops[] = { - { - .cmd = WIMAX_GNL_OP_MSG_FROM_USER, - .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, - .flags = GENL_ADMIN_PERM, - .doit = wimax_gnl_doit_msg_from_user, - }, - { - .cmd = WIMAX_GNL_OP_RESET, - .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, - .flags = GENL_ADMIN_PERM, - .doit = wimax_gnl_doit_reset, - }, - { - .cmd = WIMAX_GNL_OP_RFKILL, - .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, - .flags = GENL_ADMIN_PERM, - .doit = wimax_gnl_doit_rfkill, - }, - { - .cmd = WIMAX_GNL_OP_STATE_GET, - .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, - .flags = GENL_ADMIN_PERM, - .doit = wimax_gnl_doit_state_get, - }, -}; - - -static -size_t wimax_addr_scnprint(char *addr_str, size_t addr_str_size, - unsigned char *addr, size_t addr_len) -{ - unsigned int cnt, total; - - for (total = cnt = 0; cnt < addr_len; cnt++) - total += scnprintf(addr_str + total, addr_str_size - total, - "%02x%c", addr[cnt], - cnt == addr_len - 1 ? '\0' : ':'); - return total; -} - - -/** - * wimax_dev_add - Register a new WiMAX device - * - * @wimax_dev: WiMAX device descriptor (as embedded in your @net_dev's - * priv data). You must have called wimax_dev_init() on it before. - * - * @net_dev: net device the @wimax_dev is associated with. The - * function expects SET_NETDEV_DEV() and register_netdev() were - * already called on it. - * - * Registers the new WiMAX device, sets up the user-kernel control - * interface (generic netlink) and common WiMAX infrastructure. - * - * Note that the parts that will allow interaction with user space are - * setup at the very end, when the rest is in place, as once that - * happens, the driver might get user space control requests via - * netlink or from debugfs that might translate into calls into - * wimax_dev->op_*(). - */ -int wimax_dev_add(struct wimax_dev *wimax_dev, struct net_device *net_dev) -{ - int result; - struct device *dev = net_dev->dev.parent; - char addr_str[32]; - - d_fnstart(3, dev, "(wimax_dev %p net_dev %p)\n", wimax_dev, net_dev); - - /* Do the RFKILL setup before locking, as RFKILL will call - * into our functions. - */ - wimax_dev->net_dev = net_dev; - result = wimax_rfkill_add(wimax_dev); - if (result < 0) - goto error_rfkill_add; - - /* Set up user-space interaction */ - mutex_lock(&wimax_dev->mutex); - wimax_id_table_add(wimax_dev); - wimax_debugfs_add(wimax_dev); - - __wimax_state_set(wimax_dev, WIMAX_ST_DOWN); - mutex_unlock(&wimax_dev->mutex); - - wimax_addr_scnprint(addr_str, sizeof(addr_str), - net_dev->dev_addr, net_dev->addr_len); - dev_err(dev, "WiMAX interface %s (%s) ready\n", - net_dev->name, addr_str); - d_fnend(3, dev, "(wimax_dev %p net_dev %p) = 0\n", wimax_dev, net_dev); - return 0; - -error_rfkill_add: - d_fnend(3, dev, "(wimax_dev %p net_dev %p) = %d\n", - wimax_dev, net_dev, result); - return result; -} -EXPORT_SYMBOL_GPL(wimax_dev_add); - - -/** - * wimax_dev_rm - Unregister an existing WiMAX device - * - * @wimax_dev: WiMAX device descriptor - * - * Unregisters a WiMAX device previously registered for use with - * wimax_add_rm(). - * - * IMPORTANT! Must call before calling unregister_netdev(). - * - * After this function returns, you will not get any more user space - * control requests (via netlink or debugfs) and thus to wimax_dev->ops. - * - * Reentrancy control is ensured by setting the state to - * %__WIMAX_ST_QUIESCING. rfkill operations coming through - * wimax_*rfkill*() will be stopped by the quiescing state; ops coming - * from the rfkill subsystem will be stopped by the support being - * removed by wimax_rfkill_rm(). - */ -void wimax_dev_rm(struct wimax_dev *wimax_dev) -{ - d_fnstart(3, NULL, "(wimax_dev %p)\n", wimax_dev); - - mutex_lock(&wimax_dev->mutex); - __wimax_state_change(wimax_dev, __WIMAX_ST_QUIESCING); - wimax_debugfs_rm(wimax_dev); - wimax_id_table_rm(wimax_dev); - __wimax_state_change(wimax_dev, WIMAX_ST_DOWN); - mutex_unlock(&wimax_dev->mutex); - wimax_rfkill_rm(wimax_dev); - d_fnend(3, NULL, "(wimax_dev %p) = void\n", wimax_dev); -} -EXPORT_SYMBOL_GPL(wimax_dev_rm); - - -/* Debug framework control of debug levels */ -struct d_level D_LEVEL[] = { - D_SUBMODULE_DEFINE(debugfs), - D_SUBMODULE_DEFINE(id_table), - D_SUBMODULE_DEFINE(op_msg), - D_SUBMODULE_DEFINE(op_reset), - D_SUBMODULE_DEFINE(op_rfkill), - D_SUBMODULE_DEFINE(op_state_get), - D_SUBMODULE_DEFINE(stack), -}; -size_t D_LEVEL_SIZE = ARRAY_SIZE(D_LEVEL); - - -static const struct genl_multicast_group wimax_gnl_mcgrps[] = { - { .name = "msg", }, -}; - -struct genl_family wimax_gnl_family __ro_after_init = { - .name = "WiMAX", - .version = WIMAX_GNL_VERSION, - .hdrsize = 0, - .maxattr = WIMAX_GNL_ATTR_MAX, - .policy = wimax_gnl_policy, - .module = THIS_MODULE, - .small_ops = wimax_gnl_ops, - .n_small_ops = ARRAY_SIZE(wimax_gnl_ops), - .mcgrps = wimax_gnl_mcgrps, - .n_mcgrps = ARRAY_SIZE(wimax_gnl_mcgrps), -}; - - - -/* Shutdown the wimax stack */ -static -int __init wimax_subsys_init(void) -{ - int result; - - d_fnstart(4, NULL, "()\n"); - d_parse_params(D_LEVEL, D_LEVEL_SIZE, wimax_debug_params, - "wimax.debug"); - - result = genl_register_family(&wimax_gnl_family); - if (unlikely(result < 0)) { - pr_err("cannot register generic netlink family: %d\n", result); - goto error_register_family; - } - - d_fnend(4, NULL, "() = 0\n"); - return 0; - -error_register_family: - d_fnend(4, NULL, "() = %d\n", result); - return result; - -} -module_init(wimax_subsys_init); - - -/* Shutdown the wimax stack */ -static -void __exit wimax_subsys_exit(void) -{ - wimax_id_table_release(); - genl_unregister_family(&wimax_gnl_family); -} -module_exit(wimax_subsys_exit); - -MODULE_AUTHOR("Intel Corporation <linux-wimax@intel.com>"); -MODULE_DESCRIPTION("Linux WiMAX stack"); -MODULE_LICENSE("GPL"); diff --git a/net/wimax/wimax-internal.h b/net/wimax/wimax-internal.h deleted file mode 100644 index 40751207296c..000000000000 --- a/net/wimax/wimax-internal.h +++ /dev/null @@ -1,85 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0-only */ -/* - * Linux WiMAX - * Internal API for kernel space WiMAX stack - * - * Copyright (C) 2007 Intel Corporation <linux-wimax@intel.com> - * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com> - * - * This header file is for declarations and definitions internal to - * the WiMAX stack. For public APIs and documentation, see - * include/net/wimax.h and include/linux/wimax.h. - */ - -#ifndef __WIMAX_INTERNAL_H__ -#define __WIMAX_INTERNAL_H__ -#ifdef __KERNEL__ - -#ifdef pr_fmt -#undef pr_fmt -#endif - -#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt - -#include <linux/device.h> -#include <net/wimax.h> - - -/* - * Decide if a (locked) device is ready for use - * - * Before using the device structure, it must be locked - * (wimax_dev->mutex). As well, most operations need to call this - * function to check if the state is the right one. - * - * An error value will be returned if the state is not the right - * one. In that case, the caller should not attempt to use the device - * and just unlock it. - */ -static inline __must_check -int wimax_dev_is_ready(struct wimax_dev *wimax_dev) -{ - if (wimax_dev->state == __WIMAX_ST_NULL) - return -EINVAL; /* Device is not even registered! */ - if (wimax_dev->state == WIMAX_ST_DOWN) - return -ENOMEDIUM; - if (wimax_dev->state == __WIMAX_ST_QUIESCING) - return -ESHUTDOWN; - return 0; -} - - -static inline -void __wimax_state_set(struct wimax_dev *wimax_dev, enum wimax_st state) -{ - wimax_dev->state = state; -} -void __wimax_state_change(struct wimax_dev *, enum wimax_st); - -#ifdef CONFIG_DEBUG_FS -void wimax_debugfs_add(struct wimax_dev *); -void wimax_debugfs_rm(struct wimax_dev *); -#else -static inline void wimax_debugfs_add(struct wimax_dev *wimax_dev) {} -static inline void wimax_debugfs_rm(struct wimax_dev *wimax_dev) {} -#endif - -void wimax_id_table_add(struct wimax_dev *); -struct wimax_dev *wimax_dev_get_by_genl_info(struct genl_info *, int); -void wimax_id_table_rm(struct wimax_dev *); -void wimax_id_table_release(void); - -int wimax_rfkill_add(struct wimax_dev *); -void wimax_rfkill_rm(struct wimax_dev *); - -/* generic netlink */ -extern struct genl_family wimax_gnl_family; - -/* ops */ -int wimax_gnl_doit_msg_from_user(struct sk_buff *skb, struct genl_info *info); -int wimax_gnl_doit_reset(struct sk_buff *skb, struct genl_info *info); -int wimax_gnl_doit_rfkill(struct sk_buff *skb, struct genl_info *info); -int wimax_gnl_doit_state_get(struct sk_buff *skb, struct genl_info *info); - -#endif /* #ifdef __KERNEL__ */ -#endif /* #ifndef __WIMAX_INTERNAL_H__ */ |