![Tejun Heo](/assets/img/avatar_default.png)
percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
455 lines
9.9 KiB
C
455 lines
9.9 KiB
C
/*
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BlueZ - Bluetooth protocol stack for Linux
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Copyright (C) 2000-2001 Qualcomm Incorporated
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Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License version 2 as
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published by the Free Software Foundation;
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
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IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
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CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
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COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
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SOFTWARE IS DISCLAIMED.
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*/
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/* Bluetooth address family and sockets. */
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/list.h>
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#include <linux/errno.h>
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/skbuff.h>
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#include <linux/init.h>
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#include <linux/poll.h>
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#include <net/sock.h>
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#include <asm/ioctls.h>
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#include <linux/kmod.h>
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#include <net/bluetooth/bluetooth.h>
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#define VERSION "2.15"
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/* Bluetooth sockets */
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#define BT_MAX_PROTO 8
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static const struct net_proto_family *bt_proto[BT_MAX_PROTO];
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static DEFINE_RWLOCK(bt_proto_lock);
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static struct lock_class_key bt_lock_key[BT_MAX_PROTO];
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static const char *const bt_key_strings[BT_MAX_PROTO] = {
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"sk_lock-AF_BLUETOOTH-BTPROTO_L2CAP",
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"sk_lock-AF_BLUETOOTH-BTPROTO_HCI",
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"sk_lock-AF_BLUETOOTH-BTPROTO_SCO",
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"sk_lock-AF_BLUETOOTH-BTPROTO_RFCOMM",
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"sk_lock-AF_BLUETOOTH-BTPROTO_BNEP",
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"sk_lock-AF_BLUETOOTH-BTPROTO_CMTP",
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"sk_lock-AF_BLUETOOTH-BTPROTO_HIDP",
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"sk_lock-AF_BLUETOOTH-BTPROTO_AVDTP",
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};
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static struct lock_class_key bt_slock_key[BT_MAX_PROTO];
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static const char *const bt_slock_key_strings[BT_MAX_PROTO] = {
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"slock-AF_BLUETOOTH-BTPROTO_L2CAP",
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"slock-AF_BLUETOOTH-BTPROTO_HCI",
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"slock-AF_BLUETOOTH-BTPROTO_SCO",
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"slock-AF_BLUETOOTH-BTPROTO_RFCOMM",
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"slock-AF_BLUETOOTH-BTPROTO_BNEP",
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"slock-AF_BLUETOOTH-BTPROTO_CMTP",
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"slock-AF_BLUETOOTH-BTPROTO_HIDP",
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"slock-AF_BLUETOOTH-BTPROTO_AVDTP",
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};
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static inline void bt_sock_reclassify_lock(struct socket *sock, int proto)
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{
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struct sock *sk = sock->sk;
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if (!sk)
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return;
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BUG_ON(sock_owned_by_user(sk));
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sock_lock_init_class_and_name(sk,
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bt_slock_key_strings[proto], &bt_slock_key[proto],
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bt_key_strings[proto], &bt_lock_key[proto]);
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}
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int bt_sock_register(int proto, const struct net_proto_family *ops)
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{
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int err = 0;
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if (proto < 0 || proto >= BT_MAX_PROTO)
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return -EINVAL;
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write_lock(&bt_proto_lock);
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if (bt_proto[proto])
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err = -EEXIST;
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else
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bt_proto[proto] = ops;
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write_unlock(&bt_proto_lock);
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return err;
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}
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EXPORT_SYMBOL(bt_sock_register);
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int bt_sock_unregister(int proto)
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{
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int err = 0;
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if (proto < 0 || proto >= BT_MAX_PROTO)
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return -EINVAL;
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write_lock(&bt_proto_lock);
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if (!bt_proto[proto])
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err = -ENOENT;
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else
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bt_proto[proto] = NULL;
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write_unlock(&bt_proto_lock);
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return err;
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}
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EXPORT_SYMBOL(bt_sock_unregister);
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static int bt_sock_create(struct net *net, struct socket *sock, int proto,
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int kern)
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{
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int err;
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if (net != &init_net)
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return -EAFNOSUPPORT;
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if (proto < 0 || proto >= BT_MAX_PROTO)
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return -EINVAL;
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if (!bt_proto[proto])
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request_module("bt-proto-%d", proto);
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err = -EPROTONOSUPPORT;
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read_lock(&bt_proto_lock);
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if (bt_proto[proto] && try_module_get(bt_proto[proto]->owner)) {
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err = bt_proto[proto]->create(net, sock, proto, kern);
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bt_sock_reclassify_lock(sock, proto);
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module_put(bt_proto[proto]->owner);
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}
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read_unlock(&bt_proto_lock);
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return err;
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}
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void bt_sock_link(struct bt_sock_list *l, struct sock *sk)
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{
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write_lock_bh(&l->lock);
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sk_add_node(sk, &l->head);
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write_unlock_bh(&l->lock);
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}
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EXPORT_SYMBOL(bt_sock_link);
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void bt_sock_unlink(struct bt_sock_list *l, struct sock *sk)
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{
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write_lock_bh(&l->lock);
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sk_del_node_init(sk);
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write_unlock_bh(&l->lock);
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}
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EXPORT_SYMBOL(bt_sock_unlink);
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void bt_accept_enqueue(struct sock *parent, struct sock *sk)
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{
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BT_DBG("parent %p, sk %p", parent, sk);
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sock_hold(sk);
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list_add_tail(&bt_sk(sk)->accept_q, &bt_sk(parent)->accept_q);
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bt_sk(sk)->parent = parent;
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parent->sk_ack_backlog++;
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}
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EXPORT_SYMBOL(bt_accept_enqueue);
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void bt_accept_unlink(struct sock *sk)
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{
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BT_DBG("sk %p state %d", sk, sk->sk_state);
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list_del_init(&bt_sk(sk)->accept_q);
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bt_sk(sk)->parent->sk_ack_backlog--;
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bt_sk(sk)->parent = NULL;
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sock_put(sk);
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}
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EXPORT_SYMBOL(bt_accept_unlink);
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struct sock *bt_accept_dequeue(struct sock *parent, struct socket *newsock)
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{
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struct list_head *p, *n;
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struct sock *sk;
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BT_DBG("parent %p", parent);
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list_for_each_safe(p, n, &bt_sk(parent)->accept_q) {
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sk = (struct sock *) list_entry(p, struct bt_sock, accept_q);
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lock_sock(sk);
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/* FIXME: Is this check still needed */
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if (sk->sk_state == BT_CLOSED) {
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release_sock(sk);
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bt_accept_unlink(sk);
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continue;
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}
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if (sk->sk_state == BT_CONNECTED || !newsock ||
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bt_sk(parent)->defer_setup) {
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bt_accept_unlink(sk);
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if (newsock)
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sock_graft(sk, newsock);
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release_sock(sk);
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return sk;
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}
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release_sock(sk);
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}
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return NULL;
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}
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EXPORT_SYMBOL(bt_accept_dequeue);
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int bt_sock_recvmsg(struct kiocb *iocb, struct socket *sock,
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struct msghdr *msg, size_t len, int flags)
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{
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int noblock = flags & MSG_DONTWAIT;
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struct sock *sk = sock->sk;
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struct sk_buff *skb;
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size_t copied;
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int err;
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BT_DBG("sock %p sk %p len %zu", sock, sk, len);
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if (flags & (MSG_OOB))
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return -EOPNOTSUPP;
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if (!(skb = skb_recv_datagram(sk, flags, noblock, &err))) {
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if (sk->sk_shutdown & RCV_SHUTDOWN)
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return 0;
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return err;
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}
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msg->msg_namelen = 0;
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copied = skb->len;
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if (len < copied) {
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msg->msg_flags |= MSG_TRUNC;
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copied = len;
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}
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skb_reset_transport_header(skb);
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err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
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if (err == 0)
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sock_recv_ts_and_drops(msg, sk, skb);
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skb_free_datagram(sk, skb);
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return err ? : copied;
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}
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EXPORT_SYMBOL(bt_sock_recvmsg);
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static inline unsigned int bt_accept_poll(struct sock *parent)
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{
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struct list_head *p, *n;
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struct sock *sk;
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list_for_each_safe(p, n, &bt_sk(parent)->accept_q) {
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sk = (struct sock *) list_entry(p, struct bt_sock, accept_q);
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if (sk->sk_state == BT_CONNECTED ||
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(bt_sk(parent)->defer_setup &&
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sk->sk_state == BT_CONNECT2))
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return POLLIN | POLLRDNORM;
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}
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return 0;
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}
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unsigned int bt_sock_poll(struct file * file, struct socket *sock, poll_table *wait)
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{
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struct sock *sk = sock->sk;
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unsigned int mask = 0;
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BT_DBG("sock %p, sk %p", sock, sk);
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poll_wait(file, sk->sk_sleep, wait);
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if (sk->sk_state == BT_LISTEN)
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return bt_accept_poll(sk);
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if (sk->sk_err || !skb_queue_empty(&sk->sk_error_queue))
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mask |= POLLERR;
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if (sk->sk_shutdown & RCV_SHUTDOWN)
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mask |= POLLRDHUP;
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if (sk->sk_shutdown == SHUTDOWN_MASK)
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mask |= POLLHUP;
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if (!skb_queue_empty(&sk->sk_receive_queue) ||
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(sk->sk_shutdown & RCV_SHUTDOWN))
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mask |= POLLIN | POLLRDNORM;
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if (sk->sk_state == BT_CLOSED)
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mask |= POLLHUP;
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if (sk->sk_state == BT_CONNECT ||
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sk->sk_state == BT_CONNECT2 ||
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sk->sk_state == BT_CONFIG)
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return mask;
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if (sock_writeable(sk))
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mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
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else
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set_bit(SOCK_ASYNC_NOSPACE, &sk->sk_socket->flags);
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return mask;
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}
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EXPORT_SYMBOL(bt_sock_poll);
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int bt_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
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{
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struct sock *sk = sock->sk;
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struct sk_buff *skb;
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long amount;
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int err;
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BT_DBG("sk %p cmd %x arg %lx", sk, cmd, arg);
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switch (cmd) {
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case TIOCOUTQ:
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if (sk->sk_state == BT_LISTEN)
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return -EINVAL;
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amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
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if (amount < 0)
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amount = 0;
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err = put_user(amount, (int __user *) arg);
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break;
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case TIOCINQ:
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if (sk->sk_state == BT_LISTEN)
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return -EINVAL;
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lock_sock(sk);
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skb = skb_peek(&sk->sk_receive_queue);
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amount = skb ? skb->len : 0;
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release_sock(sk);
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err = put_user(amount, (int __user *) arg);
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break;
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case SIOCGSTAMP:
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err = sock_get_timestamp(sk, (struct timeval __user *) arg);
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break;
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case SIOCGSTAMPNS:
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err = sock_get_timestampns(sk, (struct timespec __user *) arg);
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break;
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default:
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err = -ENOIOCTLCMD;
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break;
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}
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return err;
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}
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EXPORT_SYMBOL(bt_sock_ioctl);
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int bt_sock_wait_state(struct sock *sk, int state, unsigned long timeo)
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{
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DECLARE_WAITQUEUE(wait, current);
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int err = 0;
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BT_DBG("sk %p", sk);
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add_wait_queue(sk->sk_sleep, &wait);
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while (sk->sk_state != state) {
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set_current_state(TASK_INTERRUPTIBLE);
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if (!timeo) {
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err = -EINPROGRESS;
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break;
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}
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if (signal_pending(current)) {
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err = sock_intr_errno(timeo);
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break;
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}
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release_sock(sk);
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timeo = schedule_timeout(timeo);
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lock_sock(sk);
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err = sock_error(sk);
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if (err)
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break;
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}
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set_current_state(TASK_RUNNING);
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remove_wait_queue(sk->sk_sleep, &wait);
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return err;
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}
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EXPORT_SYMBOL(bt_sock_wait_state);
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static struct net_proto_family bt_sock_family_ops = {
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.owner = THIS_MODULE,
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.family = PF_BLUETOOTH,
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.create = bt_sock_create,
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};
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static int __init bt_init(void)
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{
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int err;
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BT_INFO("Core ver %s", VERSION);
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err = bt_sysfs_init();
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if (err < 0)
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return err;
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err = sock_register(&bt_sock_family_ops);
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if (err < 0) {
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bt_sysfs_cleanup();
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return err;
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}
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BT_INFO("HCI device and connection manager initialized");
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hci_sock_init();
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return 0;
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}
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static void __exit bt_exit(void)
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{
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hci_sock_cleanup();
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sock_unregister(PF_BLUETOOTH);
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bt_sysfs_cleanup();
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}
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subsys_initcall(bt_init);
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module_exit(bt_exit);
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MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
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MODULE_DESCRIPTION("Bluetooth Core ver " VERSION);
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MODULE_VERSION(VERSION);
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MODULE_LICENSE("GPL");
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MODULE_ALIAS_NETPROTO(PF_BLUETOOTH);
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