2005-04-16 22:20:36 +00:00
|
|
|
/*
|
|
|
|
* The USB Monitor, inspired by Dave Harding's USBMon.
|
|
|
|
*
|
|
|
|
* mon_main.c: Main file, module initiation and exit, registrations, etc.
|
2005-08-16 22:16:46 +00:00
|
|
|
*
|
|
|
|
* Copyright (C) 2005 Pete Zaitcev (zaitcev@redhat.com)
|
2005-04-16 22:20:36 +00:00
|
|
|
*/
|
|
|
|
|
|
|
|
#include <linux/kernel.h>
|
|
|
|
#include <linux/module.h>
|
|
|
|
#include <linux/usb.h>
|
2010-04-24 21:21:52 +00:00
|
|
|
#include <linux/usb/hcd.h>
|
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
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>
2010-03-24 08:04:11 +00:00
|
|
|
#include <linux/slab.h>
|
2005-06-21 04:15:16 +00:00
|
|
|
#include <linux/notifier.h>
|
2006-01-11 14:55:29 +00:00
|
|
|
#include <linux/mutex.h>
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
#include "usb_mon.h"
|
2010-04-24 21:21:52 +00:00
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
static void mon_stop(struct mon_bus *mbus);
|
|
|
|
static void mon_dissolve(struct mon_bus *mbus, struct usb_bus *ubus);
|
|
|
|
static void mon_bus_drop(struct kref *r);
|
USB: add binary API to usbmon
This patch adds a new, "binary" API in addition to the old, text API usbmon
had before. The new API allows for less CPU use, and it allows to capture
all data from a packet where old API only captured 32 bytes at most. There
are some limitations and conditions to this, e.g. in case someone constructs
a URB with 1GB of data, it's not likely to be captured, because even the
huge buffers of the new reader are finite. Nonetheless, I expect this new
capability to capture all data for all real life scenarios.
The downside is, a special user mode application is required where cat(1)
worked before. I have sample code at http://people.redhat.com/zaitcev/linux/
and Paolo Abeni is working on patching libpcap.
This patch was initially written by Paolo and later I tweaked it, and
we had a little back-and-forth. So this is a jointly authored patch, but
I am submitting this I am responsible for the bugs.
Signed-off-by: Paolo Abeni <paolo.abeni@email.it>
Signed-off-by: Pete Zaitcev <zaitcev@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-12-31 06:43:10 +00:00
|
|
|
static void mon_bus_init(struct usb_bus *ubus);
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2006-01-11 14:55:29 +00:00
|
|
|
DEFINE_MUTEX(mon_lock);
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2007-04-11 20:47:26 +00:00
|
|
|
struct mon_bus mon_bus0; /* Pseudo bus meaning "all buses" */
|
2005-04-16 22:20:36 +00:00
|
|
|
static LIST_HEAD(mon_buses); /* All buses we know: struct mon_bus */
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Link a reader into the bus.
|
|
|
|
*
|
|
|
|
* This must be called with mon_lock taken because of mbus->ref.
|
|
|
|
*/
|
|
|
|
void mon_reader_add(struct mon_bus *mbus, struct mon_reader *r)
|
|
|
|
{
|
|
|
|
unsigned long flags;
|
2007-04-11 20:47:26 +00:00
|
|
|
struct list_head *p;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
spin_lock_irqsave(&mbus->lock, flags);
|
|
|
|
if (mbus->nreaders == 0) {
|
2007-04-11 20:47:26 +00:00
|
|
|
if (mbus == &mon_bus0) {
|
|
|
|
list_for_each (p, &mon_buses) {
|
|
|
|
struct mon_bus *m1;
|
|
|
|
m1 = list_entry(p, struct mon_bus, bus_link);
|
|
|
|
m1->u_bus->monitored = 1;
|
|
|
|
}
|
|
|
|
} else {
|
|
|
|
mbus->u_bus->monitored = 1;
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
mbus->nreaders++;
|
|
|
|
list_add_tail(&r->r_link, &mbus->r_list);
|
|
|
|
spin_unlock_irqrestore(&mbus->lock, flags);
|
|
|
|
|
|
|
|
kref_get(&mbus->ref);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Unlink reader from the bus.
|
|
|
|
*
|
|
|
|
* This is called with mon_lock taken, so we can decrement mbus->ref.
|
|
|
|
*/
|
|
|
|
void mon_reader_del(struct mon_bus *mbus, struct mon_reader *r)
|
|
|
|
{
|
|
|
|
unsigned long flags;
|
|
|
|
|
|
|
|
spin_lock_irqsave(&mbus->lock, flags);
|
|
|
|
list_del(&r->r_link);
|
|
|
|
--mbus->nreaders;
|
|
|
|
if (mbus->nreaders == 0)
|
|
|
|
mon_stop(mbus);
|
|
|
|
spin_unlock_irqrestore(&mbus->lock, flags);
|
|
|
|
|
|
|
|
kref_put(&mbus->ref, mon_bus_drop);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
*/
|
2007-04-11 20:47:26 +00:00
|
|
|
static void mon_bus_submit(struct mon_bus *mbus, struct urb *urb)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
|
|
|
unsigned long flags;
|
|
|
|
struct list_head *pos;
|
|
|
|
struct mon_reader *r;
|
|
|
|
|
|
|
|
spin_lock_irqsave(&mbus->lock, flags);
|
2006-06-10 03:10:10 +00:00
|
|
|
mbus->cnt_events++;
|
2005-04-16 22:20:36 +00:00
|
|
|
list_for_each (pos, &mbus->r_list) {
|
|
|
|
r = list_entry(pos, struct mon_reader, r_link);
|
|
|
|
r->rnf_submit(r->r_data, urb);
|
|
|
|
}
|
|
|
|
spin_unlock_irqrestore(&mbus->lock, flags);
|
2007-04-11 20:47:26 +00:00
|
|
|
}
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2007-04-11 20:47:26 +00:00
|
|
|
static void mon_submit(struct usb_bus *ubus, struct urb *urb)
|
|
|
|
{
|
|
|
|
struct mon_bus *mbus;
|
|
|
|
|
2015-04-30 09:32:57 +00:00
|
|
|
mbus = ubus->mon_bus;
|
|
|
|
if (mbus != NULL)
|
2007-04-11 20:47:26 +00:00
|
|
|
mon_bus_submit(mbus, urb);
|
|
|
|
mon_bus_submit(&mon_bus0, urb);
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
*/
|
2007-04-11 20:47:26 +00:00
|
|
|
static void mon_bus_submit_error(struct mon_bus *mbus, struct urb *urb, int error)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
2006-06-10 05:03:32 +00:00
|
|
|
unsigned long flags;
|
|
|
|
struct list_head *pos;
|
|
|
|
struct mon_reader *r;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2006-06-10 05:03:32 +00:00
|
|
|
spin_lock_irqsave(&mbus->lock, flags);
|
|
|
|
mbus->cnt_events++;
|
|
|
|
list_for_each (pos, &mbus->r_list) {
|
|
|
|
r = list_entry(pos, struct mon_reader, r_link);
|
|
|
|
r->rnf_error(r->r_data, urb, error);
|
|
|
|
}
|
|
|
|
spin_unlock_irqrestore(&mbus->lock, flags);
|
2007-04-11 20:47:26 +00:00
|
|
|
}
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2007-04-11 20:47:26 +00:00
|
|
|
static void mon_submit_error(struct usb_bus *ubus, struct urb *urb, int error)
|
|
|
|
{
|
|
|
|
struct mon_bus *mbus;
|
|
|
|
|
2015-04-30 09:32:57 +00:00
|
|
|
mbus = ubus->mon_bus;
|
|
|
|
if (mbus != NULL)
|
2007-04-11 20:47:26 +00:00
|
|
|
mon_bus_submit_error(mbus, urb, error);
|
|
|
|
mon_bus_submit_error(&mon_bus0, urb, error);
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
*/
|
2008-03-20 05:29:51 +00:00
|
|
|
static void mon_bus_complete(struct mon_bus *mbus, struct urb *urb, int status)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
|
|
|
unsigned long flags;
|
|
|
|
struct list_head *pos;
|
|
|
|
struct mon_reader *r;
|
|
|
|
|
2007-04-11 20:47:26 +00:00
|
|
|
spin_lock_irqsave(&mbus->lock, flags);
|
|
|
|
mbus->cnt_events++;
|
|
|
|
list_for_each (pos, &mbus->r_list) {
|
|
|
|
r = list_entry(pos, struct mon_reader, r_link);
|
2007-08-24 19:41:41 +00:00
|
|
|
r->rnf_complete(r->r_data, urb, status);
|
2007-04-11 20:47:26 +00:00
|
|
|
}
|
|
|
|
spin_unlock_irqrestore(&mbus->lock, flags);
|
|
|
|
}
|
|
|
|
|
2007-08-24 19:41:41 +00:00
|
|
|
static void mon_complete(struct usb_bus *ubus, struct urb *urb, int status)
|
2007-04-11 20:47:26 +00:00
|
|
|
{
|
|
|
|
struct mon_bus *mbus;
|
|
|
|
|
2015-04-30 09:32:57 +00:00
|
|
|
mbus = ubus->mon_bus;
|
|
|
|
if (mbus != NULL)
|
2007-08-24 19:41:41 +00:00
|
|
|
mon_bus_complete(mbus, urb, status);
|
|
|
|
mon_bus_complete(&mon_bus0, urb, status);
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/* int (*unlink_urb) (struct urb *urb, int status); */
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Stop monitoring.
|
|
|
|
*/
|
|
|
|
static void mon_stop(struct mon_bus *mbus)
|
|
|
|
{
|
2007-08-14 07:42:53 +00:00
|
|
|
struct usb_bus *ubus;
|
2007-04-11 20:47:26 +00:00
|
|
|
struct list_head *p;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2007-04-11 20:47:26 +00:00
|
|
|
if (mbus == &mon_bus0) {
|
|
|
|
list_for_each (p, &mon_buses) {
|
|
|
|
mbus = list_entry(p, struct mon_bus, bus_link);
|
|
|
|
/*
|
|
|
|
* We do not change nreaders here, so rely on mon_lock.
|
|
|
|
*/
|
|
|
|
if (mbus->nreaders == 0 && (ubus = mbus->u_bus) != NULL)
|
|
|
|
ubus->monitored = 0;
|
|
|
|
}
|
|
|
|
} else {
|
|
|
|
/*
|
|
|
|
* A stop can be called for a dissolved mon_bus in case of
|
|
|
|
* a reader staying across an rmmod foo_hcd, so test ->u_bus.
|
|
|
|
*/
|
|
|
|
if (mon_bus0.nreaders == 0 && (ubus = mbus->u_bus) != NULL) {
|
|
|
|
ubus->monitored = 0;
|
|
|
|
mb();
|
|
|
|
}
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Add a USB bus (usually by a modprobe foo-hcd)
|
|
|
|
*
|
|
|
|
* This does not return an error code because the core cannot care less
|
|
|
|
* if monitoring is not established.
|
|
|
|
*/
|
|
|
|
static void mon_bus_add(struct usb_bus *ubus)
|
|
|
|
{
|
USB: add binary API to usbmon
This patch adds a new, "binary" API in addition to the old, text API usbmon
had before. The new API allows for less CPU use, and it allows to capture
all data from a packet where old API only captured 32 bytes at most. There
are some limitations and conditions to this, e.g. in case someone constructs
a URB with 1GB of data, it's not likely to be captured, because even the
huge buffers of the new reader are finite. Nonetheless, I expect this new
capability to capture all data for all real life scenarios.
The downside is, a special user mode application is required where cat(1)
worked before. I have sample code at http://people.redhat.com/zaitcev/linux/
and Paolo Abeni is working on patching libpcap.
This patch was initially written by Paolo and later I tweaked it, and
we had a little back-and-forth. So this is a jointly authored patch, but
I am submitting this I am responsible for the bugs.
Signed-off-by: Paolo Abeni <paolo.abeni@email.it>
Signed-off-by: Pete Zaitcev <zaitcev@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-12-31 06:43:10 +00:00
|
|
|
mon_bus_init(ubus);
|
2007-04-11 20:47:26 +00:00
|
|
|
mutex_lock(&mon_lock);
|
|
|
|
if (mon_bus0.nreaders != 0)
|
|
|
|
ubus->monitored = 1;
|
|
|
|
mutex_unlock(&mon_lock);
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Remove a USB bus (either from rmmod foo-hcd or from a hot-remove event).
|
|
|
|
*/
|
|
|
|
static void mon_bus_remove(struct usb_bus *ubus)
|
|
|
|
{
|
|
|
|
struct mon_bus *mbus = ubus->mon_bus;
|
|
|
|
|
2006-01-11 14:55:29 +00:00
|
|
|
mutex_lock(&mon_lock);
|
2005-04-16 22:20:36 +00:00
|
|
|
list_del(&mbus->bus_link);
|
USB: add binary API to usbmon
This patch adds a new, "binary" API in addition to the old, text API usbmon
had before. The new API allows for less CPU use, and it allows to capture
all data from a packet where old API only captured 32 bytes at most. There
are some limitations and conditions to this, e.g. in case someone constructs
a URB with 1GB of data, it's not likely to be captured, because even the
huge buffers of the new reader are finite. Nonetheless, I expect this new
capability to capture all data for all real life scenarios.
The downside is, a special user mode application is required where cat(1)
worked before. I have sample code at http://people.redhat.com/zaitcev/linux/
and Paolo Abeni is working on patching libpcap.
This patch was initially written by Paolo and later I tweaked it, and
we had a little back-and-forth. So this is a jointly authored patch, but
I am submitting this I am responsible for the bugs.
Signed-off-by: Paolo Abeni <paolo.abeni@email.it>
Signed-off-by: Pete Zaitcev <zaitcev@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-12-31 06:43:10 +00:00
|
|
|
if (mbus->text_inited)
|
|
|
|
mon_text_del(mbus);
|
2007-05-03 23:51:16 +00:00
|
|
|
if (mbus->bin_inited)
|
|
|
|
mon_bin_del(mbus);
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
mon_dissolve(mbus, ubus);
|
|
|
|
kref_put(&mbus->ref, mon_bus_drop);
|
2006-01-11 14:55:29 +00:00
|
|
|
mutex_unlock(&mon_lock);
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
|
2005-06-21 04:15:16 +00:00
|
|
|
static int mon_notify(struct notifier_block *self, unsigned long action,
|
|
|
|
void *dev)
|
|
|
|
{
|
|
|
|
switch (action) {
|
|
|
|
case USB_BUS_ADD:
|
|
|
|
mon_bus_add(dev);
|
|
|
|
break;
|
|
|
|
case USB_BUS_REMOVE:
|
|
|
|
mon_bus_remove(dev);
|
|
|
|
}
|
|
|
|
return NOTIFY_OK;
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct notifier_block mon_nb = {
|
|
|
|
.notifier_call = mon_notify,
|
|
|
|
};
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
/*
|
|
|
|
* Ops
|
|
|
|
*/
|
|
|
|
static struct usb_mon_operations mon_ops_0 = {
|
|
|
|
.urb_submit = mon_submit,
|
|
|
|
.urb_submit_error = mon_submit_error,
|
|
|
|
.urb_complete = mon_complete,
|
|
|
|
};
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Tear usb_bus and mon_bus apart.
|
|
|
|
*/
|
|
|
|
static void mon_dissolve(struct mon_bus *mbus, struct usb_bus *ubus)
|
|
|
|
{
|
|
|
|
|
|
|
|
if (ubus->monitored) {
|
|
|
|
ubus->monitored = 0;
|
|
|
|
mb();
|
|
|
|
}
|
|
|
|
|
|
|
|
ubus->mon_bus = NULL;
|
|
|
|
mbus->u_bus = NULL;
|
|
|
|
mb();
|
2007-04-11 20:47:26 +00:00
|
|
|
|
|
|
|
/* We want synchronize_irq() here, but that needs an argument. */
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
*/
|
|
|
|
static void mon_bus_drop(struct kref *r)
|
|
|
|
{
|
|
|
|
struct mon_bus *mbus = container_of(r, struct mon_bus, ref);
|
|
|
|
kfree(mbus);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Initialize a bus for us:
|
|
|
|
* - allocate mon_bus
|
|
|
|
* - refcount USB bus struct
|
|
|
|
* - link
|
|
|
|
*/
|
USB: add binary API to usbmon
This patch adds a new, "binary" API in addition to the old, text API usbmon
had before. The new API allows for less CPU use, and it allows to capture
all data from a packet where old API only captured 32 bytes at most. There
are some limitations and conditions to this, e.g. in case someone constructs
a URB with 1GB of data, it's not likely to be captured, because even the
huge buffers of the new reader are finite. Nonetheless, I expect this new
capability to capture all data for all real life scenarios.
The downside is, a special user mode application is required where cat(1)
worked before. I have sample code at http://people.redhat.com/zaitcev/linux/
and Paolo Abeni is working on patching libpcap.
This patch was initially written by Paolo and later I tweaked it, and
we had a little back-and-forth. So this is a jointly authored patch, but
I am submitting this I am responsible for the bugs.
Signed-off-by: Paolo Abeni <paolo.abeni@email.it>
Signed-off-by: Pete Zaitcev <zaitcev@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-12-31 06:43:10 +00:00
|
|
|
static void mon_bus_init(struct usb_bus *ubus)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
|
|
|
struct mon_bus *mbus;
|
|
|
|
|
2015-04-30 09:32:57 +00:00
|
|
|
mbus = kzalloc(sizeof(struct mon_bus), GFP_KERNEL);
|
|
|
|
if (mbus == NULL)
|
2005-04-16 22:20:36 +00:00
|
|
|
goto err_alloc;
|
|
|
|
kref_init(&mbus->ref);
|
|
|
|
spin_lock_init(&mbus->lock);
|
|
|
|
INIT_LIST_HEAD(&mbus->r_list);
|
|
|
|
|
|
|
|
/*
|
2006-08-30 15:32:52 +00:00
|
|
|
* We don't need to take a reference to ubus, because we receive
|
|
|
|
* a notification if the bus is about to be removed.
|
2005-04-16 22:20:36 +00:00
|
|
|
*/
|
|
|
|
mbus->u_bus = ubus;
|
|
|
|
ubus->mon_bus = mbus;
|
|
|
|
|
2007-05-03 23:51:16 +00:00
|
|
|
mbus->text_inited = mon_text_add(mbus, ubus);
|
|
|
|
mbus->bin_inited = mon_bin_add(mbus, ubus);
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2006-01-11 14:55:29 +00:00
|
|
|
mutex_lock(&mon_lock);
|
2005-04-16 22:20:36 +00:00
|
|
|
list_add_tail(&mbus->bus_link, &mon_buses);
|
2006-01-11 14:55:29 +00:00
|
|
|
mutex_unlock(&mon_lock);
|
2005-04-16 22:20:36 +00:00
|
|
|
return;
|
|
|
|
|
|
|
|
err_alloc:
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
2007-04-11 20:47:26 +00:00
|
|
|
static void mon_bus0_init(void)
|
|
|
|
{
|
|
|
|
struct mon_bus *mbus = &mon_bus0;
|
|
|
|
|
|
|
|
kref_init(&mbus->ref);
|
|
|
|
spin_lock_init(&mbus->lock);
|
|
|
|
INIT_LIST_HEAD(&mbus->r_list);
|
|
|
|
|
2007-05-03 23:51:16 +00:00
|
|
|
mbus->text_inited = mon_text_add(mbus, NULL);
|
|
|
|
mbus->bin_inited = mon_bin_add(mbus, NULL);
|
2007-04-11 20:47:26 +00:00
|
|
|
}
|
|
|
|
|
USB: add binary API to usbmon
This patch adds a new, "binary" API in addition to the old, text API usbmon
had before. The new API allows for less CPU use, and it allows to capture
all data from a packet where old API only captured 32 bytes at most. There
are some limitations and conditions to this, e.g. in case someone constructs
a URB with 1GB of data, it's not likely to be captured, because even the
huge buffers of the new reader are finite. Nonetheless, I expect this new
capability to capture all data for all real life scenarios.
The downside is, a special user mode application is required where cat(1)
worked before. I have sample code at http://people.redhat.com/zaitcev/linux/
and Paolo Abeni is working on patching libpcap.
This patch was initially written by Paolo and later I tweaked it, and
we had a little back-and-forth. So this is a jointly authored patch, but
I am submitting this I am responsible for the bugs.
Signed-off-by: Paolo Abeni <paolo.abeni@email.it>
Signed-off-by: Pete Zaitcev <zaitcev@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-12-31 06:43:10 +00:00
|
|
|
/*
|
|
|
|
* Search a USB bus by number. Notice that USB bus numbers start from one,
|
|
|
|
* which we may later use to identify "all" with zero.
|
|
|
|
*
|
|
|
|
* This function must be called with mon_lock held.
|
|
|
|
*
|
|
|
|
* This is obviously inefficient and may be revised in the future.
|
|
|
|
*/
|
|
|
|
struct mon_bus *mon_bus_lookup(unsigned int num)
|
|
|
|
{
|
|
|
|
struct list_head *p;
|
|
|
|
struct mon_bus *mbus;
|
|
|
|
|
2007-04-11 20:47:26 +00:00
|
|
|
if (num == 0) {
|
|
|
|
return &mon_bus0;
|
|
|
|
}
|
USB: add binary API to usbmon
This patch adds a new, "binary" API in addition to the old, text API usbmon
had before. The new API allows for less CPU use, and it allows to capture
all data from a packet where old API only captured 32 bytes at most. There
are some limitations and conditions to this, e.g. in case someone constructs
a URB with 1GB of data, it's not likely to be captured, because even the
huge buffers of the new reader are finite. Nonetheless, I expect this new
capability to capture all data for all real life scenarios.
The downside is, a special user mode application is required where cat(1)
worked before. I have sample code at http://people.redhat.com/zaitcev/linux/
and Paolo Abeni is working on patching libpcap.
This patch was initially written by Paolo and later I tweaked it, and
we had a little back-and-forth. So this is a jointly authored patch, but
I am submitting this I am responsible for the bugs.
Signed-off-by: Paolo Abeni <paolo.abeni@email.it>
Signed-off-by: Pete Zaitcev <zaitcev@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-12-31 06:43:10 +00:00
|
|
|
list_for_each (p, &mon_buses) {
|
|
|
|
mbus = list_entry(p, struct mon_bus, bus_link);
|
|
|
|
if (mbus->u_bus->busnum == num) {
|
|
|
|
return mbus;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
static int __init mon_init(void)
|
|
|
|
{
|
|
|
|
struct usb_bus *ubus;
|
USB: add binary API to usbmon
This patch adds a new, "binary" API in addition to the old, text API usbmon
had before. The new API allows for less CPU use, and it allows to capture
all data from a packet where old API only captured 32 bytes at most. There
are some limitations and conditions to this, e.g. in case someone constructs
a URB with 1GB of data, it's not likely to be captured, because even the
huge buffers of the new reader are finite. Nonetheless, I expect this new
capability to capture all data for all real life scenarios.
The downside is, a special user mode application is required where cat(1)
worked before. I have sample code at http://people.redhat.com/zaitcev/linux/
and Paolo Abeni is working on patching libpcap.
This patch was initially written by Paolo and later I tweaked it, and
we had a little back-and-forth. So this is a jointly authored patch, but
I am submitting this I am responsible for the bugs.
Signed-off-by: Paolo Abeni <paolo.abeni@email.it>
Signed-off-by: Pete Zaitcev <zaitcev@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-12-31 06:43:10 +00:00
|
|
|
int rc;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
USB: add binary API to usbmon
This patch adds a new, "binary" API in addition to the old, text API usbmon
had before. The new API allows for less CPU use, and it allows to capture
all data from a packet where old API only captured 32 bytes at most. There
are some limitations and conditions to this, e.g. in case someone constructs
a URB with 1GB of data, it's not likely to be captured, because even the
huge buffers of the new reader are finite. Nonetheless, I expect this new
capability to capture all data for all real life scenarios.
The downside is, a special user mode application is required where cat(1)
worked before. I have sample code at http://people.redhat.com/zaitcev/linux/
and Paolo Abeni is working on patching libpcap.
This patch was initially written by Paolo and later I tweaked it, and
we had a little back-and-forth. So this is a jointly authored patch, but
I am submitting this I am responsible for the bugs.
Signed-off-by: Paolo Abeni <paolo.abeni@email.it>
Signed-off-by: Pete Zaitcev <zaitcev@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-12-31 06:43:10 +00:00
|
|
|
if ((rc = mon_text_init()) != 0)
|
|
|
|
goto err_text;
|
|
|
|
if ((rc = mon_bin_init()) != 0)
|
|
|
|
goto err_bin;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2007-04-11 20:47:26 +00:00
|
|
|
mon_bus0_init();
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
if (usb_mon_register(&mon_ops_0) != 0) {
|
|
|
|
printk(KERN_NOTICE TAG ": unable to register with the core\n");
|
USB: add binary API to usbmon
This patch adds a new, "binary" API in addition to the old, text API usbmon
had before. The new API allows for less CPU use, and it allows to capture
all data from a packet where old API only captured 32 bytes at most. There
are some limitations and conditions to this, e.g. in case someone constructs
a URB with 1GB of data, it's not likely to be captured, because even the
huge buffers of the new reader are finite. Nonetheless, I expect this new
capability to capture all data for all real life scenarios.
The downside is, a special user mode application is required where cat(1)
worked before. I have sample code at http://people.redhat.com/zaitcev/linux/
and Paolo Abeni is working on patching libpcap.
This patch was initially written by Paolo and later I tweaked it, and
we had a little back-and-forth. So this is a jointly authored patch, but
I am submitting this I am responsible for the bugs.
Signed-off-by: Paolo Abeni <paolo.abeni@email.it>
Signed-off-by: Pete Zaitcev <zaitcev@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-12-31 06:43:10 +00:00
|
|
|
rc = -ENODEV;
|
|
|
|
goto err_reg;
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
// MOD_INC_USE_COUNT(which_module?);
|
|
|
|
|
2006-01-11 14:55:29 +00:00
|
|
|
mutex_lock(&usb_bus_list_lock);
|
2005-04-16 22:20:36 +00:00
|
|
|
list_for_each_entry (ubus, &usb_bus_list, bus_list) {
|
USB: add binary API to usbmon
This patch adds a new, "binary" API in addition to the old, text API usbmon
had before. The new API allows for less CPU use, and it allows to capture
all data from a packet where old API only captured 32 bytes at most. There
are some limitations and conditions to this, e.g. in case someone constructs
a URB with 1GB of data, it's not likely to be captured, because even the
huge buffers of the new reader are finite. Nonetheless, I expect this new
capability to capture all data for all real life scenarios.
The downside is, a special user mode application is required where cat(1)
worked before. I have sample code at http://people.redhat.com/zaitcev/linux/
and Paolo Abeni is working on patching libpcap.
This patch was initially written by Paolo and later I tweaked it, and
we had a little back-and-forth. So this is a jointly authored patch, but
I am submitting this I am responsible for the bugs.
Signed-off-by: Paolo Abeni <paolo.abeni@email.it>
Signed-off-by: Pete Zaitcev <zaitcev@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-12-31 06:43:10 +00:00
|
|
|
mon_bus_init(ubus);
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
2008-09-22 22:00:10 +00:00
|
|
|
usb_register_notify(&mon_nb);
|
2006-01-11 14:55:29 +00:00
|
|
|
mutex_unlock(&usb_bus_list_lock);
|
2005-04-16 22:20:36 +00:00
|
|
|
return 0;
|
USB: add binary API to usbmon
This patch adds a new, "binary" API in addition to the old, text API usbmon
had before. The new API allows for less CPU use, and it allows to capture
all data from a packet where old API only captured 32 bytes at most. There
are some limitations and conditions to this, e.g. in case someone constructs
a URB with 1GB of data, it's not likely to be captured, because even the
huge buffers of the new reader are finite. Nonetheless, I expect this new
capability to capture all data for all real life scenarios.
The downside is, a special user mode application is required where cat(1)
worked before. I have sample code at http://people.redhat.com/zaitcev/linux/
and Paolo Abeni is working on patching libpcap.
This patch was initially written by Paolo and later I tweaked it, and
we had a little back-and-forth. So this is a jointly authored patch, but
I am submitting this I am responsible for the bugs.
Signed-off-by: Paolo Abeni <paolo.abeni@email.it>
Signed-off-by: Pete Zaitcev <zaitcev@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-12-31 06:43:10 +00:00
|
|
|
|
|
|
|
err_reg:
|
|
|
|
mon_bin_exit();
|
|
|
|
err_bin:
|
|
|
|
mon_text_exit();
|
|
|
|
err_text:
|
|
|
|
return rc;
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static void __exit mon_exit(void)
|
|
|
|
{
|
|
|
|
struct mon_bus *mbus;
|
|
|
|
struct list_head *p;
|
|
|
|
|
2005-06-21 04:15:16 +00:00
|
|
|
usb_unregister_notify(&mon_nb);
|
2005-04-16 22:20:36 +00:00
|
|
|
usb_mon_deregister();
|
|
|
|
|
2006-01-11 14:55:29 +00:00
|
|
|
mutex_lock(&mon_lock);
|
2007-04-11 20:47:26 +00:00
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
while (!list_empty(&mon_buses)) {
|
|
|
|
p = mon_buses.next;
|
|
|
|
mbus = list_entry(p, struct mon_bus, bus_link);
|
|
|
|
list_del(p);
|
|
|
|
|
USB: add binary API to usbmon
This patch adds a new, "binary" API in addition to the old, text API usbmon
had before. The new API allows for less CPU use, and it allows to capture
all data from a packet where old API only captured 32 bytes at most. There
are some limitations and conditions to this, e.g. in case someone constructs
a URB with 1GB of data, it's not likely to be captured, because even the
huge buffers of the new reader are finite. Nonetheless, I expect this new
capability to capture all data for all real life scenarios.
The downside is, a special user mode application is required where cat(1)
worked before. I have sample code at http://people.redhat.com/zaitcev/linux/
and Paolo Abeni is working on patching libpcap.
This patch was initially written by Paolo and later I tweaked it, and
we had a little back-and-forth. So this is a jointly authored patch, but
I am submitting this I am responsible for the bugs.
Signed-off-by: Paolo Abeni <paolo.abeni@email.it>
Signed-off-by: Pete Zaitcev <zaitcev@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-12-31 06:43:10 +00:00
|
|
|
if (mbus->text_inited)
|
|
|
|
mon_text_del(mbus);
|
2007-05-03 23:51:16 +00:00
|
|
|
if (mbus->bin_inited)
|
|
|
|
mon_bin_del(mbus);
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
/*
|
|
|
|
* This never happens, because the open/close paths in
|
|
|
|
* file level maintain module use counters and so rmmod fails
|
|
|
|
* before reaching here. However, better be safe...
|
|
|
|
*/
|
|
|
|
if (mbus->nreaders) {
|
|
|
|
printk(KERN_ERR TAG
|
|
|
|
": Outstanding opens (%d) on usb%d, leaking...\n",
|
|
|
|
mbus->nreaders, mbus->u_bus->busnum);
|
|
|
|
atomic_set(&mbus->ref.refcount, 2); /* Force leak */
|
|
|
|
}
|
|
|
|
|
|
|
|
mon_dissolve(mbus, mbus->u_bus);
|
|
|
|
kref_put(&mbus->ref, mon_bus_drop);
|
|
|
|
}
|
2007-04-11 20:47:26 +00:00
|
|
|
|
|
|
|
mbus = &mon_bus0;
|
|
|
|
if (mbus->text_inited)
|
|
|
|
mon_text_del(mbus);
|
2007-05-03 23:51:16 +00:00
|
|
|
if (mbus->bin_inited)
|
|
|
|
mon_bin_del(mbus);
|
2007-04-11 20:47:26 +00:00
|
|
|
|
2006-01-11 14:55:29 +00:00
|
|
|
mutex_unlock(&mon_lock);
|
2005-04-16 22:20:36 +00:00
|
|
|
|
USB: add binary API to usbmon
This patch adds a new, "binary" API in addition to the old, text API usbmon
had before. The new API allows for less CPU use, and it allows to capture
all data from a packet where old API only captured 32 bytes at most. There
are some limitations and conditions to this, e.g. in case someone constructs
a URB with 1GB of data, it's not likely to be captured, because even the
huge buffers of the new reader are finite. Nonetheless, I expect this new
capability to capture all data for all real life scenarios.
The downside is, a special user mode application is required where cat(1)
worked before. I have sample code at http://people.redhat.com/zaitcev/linux/
and Paolo Abeni is working on patching libpcap.
This patch was initially written by Paolo and later I tweaked it, and
we had a little back-and-forth. So this is a jointly authored patch, but
I am submitting this I am responsible for the bugs.
Signed-off-by: Paolo Abeni <paolo.abeni@email.it>
Signed-off-by: Pete Zaitcev <zaitcev@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-12-31 06:43:10 +00:00
|
|
|
mon_text_exit();
|
|
|
|
mon_bin_exit();
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
module_init(mon_init);
|
|
|
|
module_exit(mon_exit);
|
|
|
|
|
|
|
|
MODULE_LICENSE("GPL");
|