/*
   CMTP implementation for Linux Bluetooth stack (BlueZ).
   Copyright (C) 2002-2003 Marcel Holtmann <marcel@holtmann.org>

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License version 2 as
   published by the Free Software Foundation;

   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
   OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
   IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
   CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
   WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
   ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
   OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

   ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
   COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
   SOFTWARE IS DISCLAIMED.
*/

#ifndef __CMTP_H
#define __CMTP_H

#include <linux/types.h>
#include <net/bluetooth/bluetooth.h>

#define BTNAMSIZ 18

/* CMTP ioctl defines */
#define CMTPCONNADD	_IOW('C', 200, int)
#define CMTPCONNDEL	_IOW('C', 201, int)
#define CMTPGETCONNLIST	_IOR('C', 210, int)
#define CMTPGETCONNINFO	_IOR('C', 211, int)

#define CMTP_LOOPBACK	0

struct cmtp_connadd_req {
	int   sock;	/* Connected socket */
	__u32 flags;
};

struct cmtp_conndel_req {
	bdaddr_t bdaddr;
	__u32    flags;
};

struct cmtp_conninfo {
	bdaddr_t bdaddr;
	__u32    flags;
	__u16    state;
	int      num;
};

struct cmtp_connlist_req {
	__u32  cnum;
	struct cmtp_conninfo __user *ci;
};

int cmtp_add_connection(struct cmtp_connadd_req *req, struct socket *sock);
int cmtp_del_connection(struct cmtp_conndel_req *req);
int cmtp_get_connlist(struct cmtp_connlist_req *req);
int cmtp_get_conninfo(struct cmtp_conninfo *ci);

/* CMTP session defines */
#define CMTP_INTEROP_TIMEOUT	(HZ * 5)
#define CMTP_INITIAL_MSGNUM	0xff00

struct cmtp_session {
	struct list_head list;

	struct socket *sock;

	bdaddr_t bdaddr;

	unsigned long state;
	unsigned long flags;

	uint mtu;

	char name[BTNAMSIZ];

	atomic_t terminate;
	struct task_struct *task;

	wait_queue_head_t wait;

	int ncontroller;
	int num;
	struct capi_ctr ctrl;

	struct list_head applications;

	unsigned long blockids;
	int msgnum;

	struct sk_buff_head transmit;

	struct sk_buff *reassembly[16];
};

struct cmtp_application {
	struct list_head list;

	unsigned long state;
	int err;

	__u16 appl;
	__u16 mapping;

	__u16 msgnum;
};

struct cmtp_scb {
	int id;
	int data;
};

int  cmtp_attach_device(struct cmtp_session *session);
void cmtp_detach_device(struct cmtp_session *session);

void cmtp_recv_capimsg(struct cmtp_session *session, struct sk_buff *skb);

/* CMTP init defines */
int cmtp_init_sockets(void);
void cmtp_cleanup_sockets(void);

#endif /* __CMTP_H */
sm-generic?id=64679e565a4a099c5d5dc2ecf103dcaf039ef8c7&amp;showmsg=1'>asm-generic</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/cgit.cgi/linux/net-next.git/log/include/asm-generic?id=64679e565a4a099c5d5dc2ecf103dcaf039ef8c7'>Collapse</a>)</th><th class='left'>Author</th><th class='left'>Files</th><th class='left'>Lines</th></tr>
<tr class='logheader'><td><span title='2017-02-03 08:28:25 -0800'>2017-02-03</span></td><td class='logsubject'><a href='/cgit.cgi/linux/net-next.git/commit/include/asm-generic?id=71810db27c1c853b335675bee335d893bc3d324b'>modversions: treat symbol CRCs as 32 bit quantities</a></td><td>Ard Biesheuvel</td><td>1</td><td><span class='deletions'>-5</span>/<span class='insertions'>+6</span></td></tr>
<tr class='nohover-highlight'><td/><td colspan='5' class='logmsg'>
The modversion symbol CRCs are emitted as ELF symbols, which allows us
to easily populate the kcrctab sections by relying on the linker to
associate each kcrctab slot with the correct value.

This has a couple of downsides:

 - Given that the CRCs are treated as memory addresses, we waste 4 bytes
   for each CRC on 64 bit architectures,

 - On architectures that support runtime relocation, a R_&lt;arch&gt;_RELATIVE
   relocation entry is emitted for each CRC value, which identifies it
   as a quantity that requires fixing up based on the actual runtime
   load offset of the kernel. This results in corrupted CRCs unless we
   explicitly undo the fixup (and this is currently being handled in the
   core module code)

 - Such runtime relocation entries take up 24 bytes of __init space
   each, resulting in a x8 overhead in [uncompressed] kernel size for
   CRCs.

Switching to explicit 32 bit values on 64 bit architectures fixes most
of these issues, given that 32 bit values are not treated as quantities
that require fixing up based on the actual runtime load offset.  Note
that on some ELF64 architectures [such as PPC64], these 32-bit values
are still emitted as [absolute] runtime relocatable quantities, even if
the value resolves to a build time constant.  Since relative relocations
are always resolved at build time, this patch enables MODULE_REL_CRCS on
powerpc when CONFIG_RELOCATABLE=y, which turns the absolute CRC
references into relative references into .rodata where the actual CRC
value is stored.

So redefine all CRC fields and variables as u32, and redefine the
__CRC_SYMBOL() macro for 64 bit builds to emit the CRC reference using
inline assembler (which is necessary since 64-bit C code cannot use
32-bit types to hold memory addresses, even if they are ultimately
resolved using values that do not exceed 0xffffffff).  To avoid
potential problems with legacy 32-bit architectures using legacy
toolchains, the equivalent C definition of the kcrctab entry is retained
for 32-bit architectures.

Note that this mostly reverts commit d4703aefdbc8 ("module: handle ppc64
relocating kcrctabs when CONFIG_RELOCATABLE=y")

Acked-by: Rusty Russell &lt;rusty@rustcorp.com.au&gt;
Signed-off-by: Ard Biesheuvel &lt;ard.biesheuvel@linaro.org&gt;
Signed-off-by: Linus Torvalds &lt;torvalds@linux-foundation.org&gt;


</td></tr>