2005-04-16 22:20:36 +00:00
|
|
|
/*
|
|
|
|
* The USB Monitor, inspired by Dave Harding's USBMon.
|
|
|
|
*
|
|
|
|
* This is a text format reader.
|
|
|
|
*/
|
|
|
|
|
|
|
|
#include <linux/kernel.h>
|
|
|
|
#include <linux/list.h>
|
|
|
|
#include <linux/usb.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>
|
2005-04-16 22:20:36 +00:00
|
|
|
#include <linux/time.h>
|
2006-01-11 14:55:29 +00:00
|
|
|
#include <linux/mutex.h>
|
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
|
|
|
#include <linux/debugfs.h>
|
2009-11-06 17:32:23 +00:00
|
|
|
#include <linux/scatterlist.h>
|
2005-04-16 22:20:36 +00:00
|
|
|
#include <asm/uaccess.h>
|
|
|
|
|
|
|
|
#include "usb_mon.h"
|
|
|
|
|
|
|
|
/*
|
|
|
|
* No, we do not want arbitrarily long data strings.
|
|
|
|
* Use the binary interface if you want to capture bulk data!
|
|
|
|
*/
|
|
|
|
#define DATA_MAX 32
|
|
|
|
|
2005-06-25 21:32:59 +00:00
|
|
|
/*
|
|
|
|
* Defined by USB 2.0 clause 9.3, table 9.2.
|
|
|
|
*/
|
|
|
|
#define SETUP_MAX 8
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
/*
|
|
|
|
* This limit exists to prevent OOMs when the user process stops reading.
|
2006-06-10 03:10:10 +00:00
|
|
|
* If usbmon were available to unprivileged processes, it might be open
|
|
|
|
* to a local DoS. But we have to keep to root in order to prevent
|
|
|
|
* password sniffing from HID devices.
|
2005-04-16 22:20:36 +00:00
|
|
|
*/
|
2007-02-25 03:27:33 +00:00
|
|
|
#define EVENT_MAX (4*PAGE_SIZE / sizeof(struct mon_event_text))
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2007-02-25 03:27:33 +00:00
|
|
|
/*
|
|
|
|
* Potentially unlimited number; we limit it for similar allocations.
|
|
|
|
* The usbfs limits this to 128, but we're not quite as generous.
|
|
|
|
*/
|
|
|
|
#define ISODESC_MAX 5
|
|
|
|
|
|
|
|
#define PRINTF_DFL 250 /* with 5 ISOs segs */
|
|
|
|
|
|
|
|
struct mon_iso_desc {
|
|
|
|
int status;
|
|
|
|
unsigned int offset;
|
|
|
|
unsigned int length; /* Unsigned here, signed in URB. Historic. */
|
|
|
|
};
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
struct mon_event_text {
|
|
|
|
struct list_head e_link;
|
|
|
|
int type; /* submit, complete, etc. */
|
|
|
|
unsigned long id; /* From pointer, most of the time */
|
|
|
|
unsigned int tstamp;
|
2007-02-25 03:27:33 +00:00
|
|
|
int busnum;
|
2007-08-14 07:33:40 +00:00
|
|
|
char devnum;
|
|
|
|
char epnum;
|
|
|
|
char is_in;
|
|
|
|
char xfertype;
|
2005-04-16 22:20:36 +00:00
|
|
|
int length; /* Depends on type: xfer length or act length */
|
|
|
|
int status;
|
2007-02-25 03:27:33 +00:00
|
|
|
int interval;
|
|
|
|
int start_frame;
|
|
|
|
int error_count;
|
2005-06-25 21:32:59 +00:00
|
|
|
char setup_flag;
|
2005-04-16 22:20:36 +00:00
|
|
|
char data_flag;
|
2007-02-25 03:27:33 +00:00
|
|
|
int numdesc; /* Full number */
|
|
|
|
struct mon_iso_desc isodesc[ISODESC_MAX];
|
2005-06-25 21:32:59 +00:00
|
|
|
unsigned char setup[SETUP_MAX];
|
2005-04-16 22:20:36 +00:00
|
|
|
unsigned char data[DATA_MAX];
|
|
|
|
};
|
|
|
|
|
|
|
|
#define SLAB_NAME_SZ 30
|
|
|
|
struct mon_reader_text {
|
2006-12-07 04:33:20 +00:00
|
|
|
struct kmem_cache *e_slab;
|
2005-04-16 22:20:36 +00:00
|
|
|
int nevents;
|
|
|
|
struct list_head e_list;
|
|
|
|
struct mon_reader r; /* In C, parent class can be placed anywhere */
|
|
|
|
|
|
|
|
wait_queue_head_t wait;
|
|
|
|
int printf_size;
|
|
|
|
char *printf_buf;
|
2006-01-11 14:55:29 +00:00
|
|
|
struct mutex printf_lock;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
char slab_name[SLAB_NAME_SZ];
|
|
|
|
};
|
|
|
|
|
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 struct dentry *mon_dir; /* Usually /sys/kernel/debug/usbmon */
|
|
|
|
|
2008-07-26 02:45:34 +00:00
|
|
|
static void mon_text_ctor(void *);
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2007-02-25 03:27:33 +00:00
|
|
|
struct mon_text_ptr {
|
|
|
|
int cnt, limit;
|
|
|
|
char *pbuf;
|
|
|
|
};
|
|
|
|
|
|
|
|
static struct mon_event_text *
|
|
|
|
mon_text_read_wait(struct mon_reader_text *rp, struct file *file);
|
|
|
|
static void mon_text_read_head_t(struct mon_reader_text *rp,
|
|
|
|
struct mon_text_ptr *p, const struct mon_event_text *ep);
|
|
|
|
static void mon_text_read_head_u(struct mon_reader_text *rp,
|
|
|
|
struct mon_text_ptr *p, const struct mon_event_text *ep);
|
|
|
|
static void mon_text_read_statset(struct mon_reader_text *rp,
|
|
|
|
struct mon_text_ptr *p, const struct mon_event_text *ep);
|
|
|
|
static void mon_text_read_intstat(struct mon_reader_text *rp,
|
|
|
|
struct mon_text_ptr *p, const struct mon_event_text *ep);
|
|
|
|
static void mon_text_read_isostat(struct mon_reader_text *rp,
|
|
|
|
struct mon_text_ptr *p, const struct mon_event_text *ep);
|
|
|
|
static void mon_text_read_isodesc(struct mon_reader_text *rp,
|
|
|
|
struct mon_text_ptr *p, const struct mon_event_text *ep);
|
|
|
|
static void mon_text_read_data(struct mon_reader_text *rp,
|
|
|
|
struct mon_text_ptr *p, const struct mon_event_text *ep);
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
/*
|
|
|
|
* mon_text_submit
|
|
|
|
* mon_text_complete
|
|
|
|
*
|
|
|
|
* May be called from an interrupt.
|
|
|
|
*
|
|
|
|
* This is called with the whole mon_bus locked, so no additional lock.
|
|
|
|
*/
|
|
|
|
|
2005-06-25 21:32:59 +00:00
|
|
|
static inline char mon_text_get_setup(struct mon_event_text *ep,
|
2006-08-30 15:35:21 +00:00
|
|
|
struct urb *urb, char ev_type, struct mon_bus *mbus)
|
2005-06-25 21:32:59 +00:00
|
|
|
{
|
|
|
|
|
2007-07-30 21:10:36 +00:00
|
|
|
if (ep->xfertype != USB_ENDPOINT_XFER_CONTROL || ev_type != 'S')
|
2005-06-25 21:32:59 +00:00
|
|
|
return '-';
|
|
|
|
|
|
|
|
if (urb->setup_packet == NULL)
|
|
|
|
return 'Z'; /* '0' would be not as pretty. */
|
|
|
|
|
|
|
|
memcpy(ep->setup, urb->setup_packet, SETUP_MAX);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
static inline char mon_text_get_data(struct mon_event_text *ep, struct urb *urb,
|
2006-08-30 15:35:21 +00:00
|
|
|
int len, char ev_type, struct mon_bus *mbus)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
2009-11-06 17:32:23 +00:00
|
|
|
void *src;
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
if (len <= 0)
|
|
|
|
return 'L';
|
2005-08-15 23:53:57 +00:00
|
|
|
if (len >= DATA_MAX)
|
|
|
|
len = DATA_MAX;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2007-07-30 21:10:36 +00:00
|
|
|
if (ep->is_in) {
|
2007-02-25 03:27:33 +00:00
|
|
|
if (ev_type != 'C')
|
2005-12-04 05:52:10 +00:00
|
|
|
return '<';
|
|
|
|
} else {
|
2007-02-25 03:27:33 +00:00
|
|
|
if (ev_type != 'S')
|
2005-12-04 05:52:10 +00:00
|
|
|
return '>';
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
|
2009-11-06 17:32:23 +00:00
|
|
|
if (urb->num_sgs == 0) {
|
|
|
|
src = urb->transfer_buffer;
|
|
|
|
if (src == NULL)
|
|
|
|
return 'Z'; /* '0' would be not as pretty. */
|
|
|
|
} else {
|
2010-05-01 18:20:01 +00:00
|
|
|
struct scatterlist *sg = urb->sg;
|
2009-11-06 17:32:23 +00:00
|
|
|
|
2010-04-02 17:27:28 +00:00
|
|
|
if (PageHighMem(sg_page(sg)))
|
2009-11-06 17:32:23 +00:00
|
|
|
return 'D';
|
|
|
|
|
|
|
|
/* For the text interface we copy only the first sg buffer */
|
|
|
|
len = min_t(int, sg->length, len);
|
|
|
|
src = sg_virt(sg);
|
|
|
|
}
|
2005-08-15 23:53:57 +00:00
|
|
|
|
2009-11-06 17:32:23 +00:00
|
|
|
memcpy(ep->data, src, len);
|
2005-04-16 22:20:36 +00:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline unsigned int mon_get_timestamp(void)
|
|
|
|
{
|
|
|
|
struct timeval tval;
|
|
|
|
unsigned int stamp;
|
|
|
|
|
|
|
|
do_gettimeofday(&tval);
|
2010-02-20 06:55:57 +00:00
|
|
|
stamp = tval.tv_sec & 0xFFF; /* 2^32 = 4294967296. Limit to 4096s. */
|
2005-04-16 22:20:36 +00:00
|
|
|
stamp = stamp * 1000000 + tval.tv_usec;
|
|
|
|
return stamp;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void mon_text_event(struct mon_reader_text *rp, struct urb *urb,
|
2007-08-24 19:41:41 +00:00
|
|
|
char ev_type, int status)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
|
|
|
struct mon_event_text *ep;
|
|
|
|
unsigned int stamp;
|
2007-02-25 03:27:33 +00:00
|
|
|
struct usb_iso_packet_descriptor *fp;
|
|
|
|
struct mon_iso_desc *dp;
|
|
|
|
int i, ndesc;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
stamp = mon_get_timestamp();
|
|
|
|
|
|
|
|
if (rp->nevents >= EVENT_MAX ||
|
2006-12-07 04:33:16 +00:00
|
|
|
(ep = kmem_cache_alloc(rp->e_slab, GFP_ATOMIC)) == NULL) {
|
2005-04-16 22:20:36 +00:00
|
|
|
rp->r.m_bus->cnt_text_lost++;
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
ep->type = ev_type;
|
|
|
|
ep->id = (unsigned long) urb;
|
2007-04-11 20:47:26 +00:00
|
|
|
ep->busnum = urb->dev->bus->busnum;
|
2007-07-30 21:10:36 +00:00
|
|
|
ep->devnum = urb->dev->devnum;
|
|
|
|
ep->epnum = usb_endpoint_num(&urb->ep->desc);
|
|
|
|
ep->xfertype = usb_endpoint_type(&urb->ep->desc);
|
|
|
|
ep->is_in = usb_urb_dir_in(urb);
|
2005-04-16 22:20:36 +00:00
|
|
|
ep->tstamp = stamp;
|
|
|
|
ep->length = (ev_type == 'S') ?
|
|
|
|
urb->transfer_buffer_length : urb->actual_length;
|
|
|
|
/* Collecting status makes debugging sense for submits, too */
|
2007-08-24 19:41:41 +00:00
|
|
|
ep->status = status;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2007-07-30 21:10:36 +00:00
|
|
|
if (ep->xfertype == USB_ENDPOINT_XFER_INT) {
|
2007-02-25 03:27:33 +00:00
|
|
|
ep->interval = urb->interval;
|
2007-07-30 21:10:36 +00:00
|
|
|
} else if (ep->xfertype == USB_ENDPOINT_XFER_ISOC) {
|
2007-02-25 03:27:33 +00:00
|
|
|
ep->interval = urb->interval;
|
|
|
|
ep->start_frame = urb->start_frame;
|
|
|
|
ep->error_count = urb->error_count;
|
|
|
|
}
|
|
|
|
ep->numdesc = urb->number_of_packets;
|
2007-07-30 21:10:36 +00:00
|
|
|
if (ep->xfertype == USB_ENDPOINT_XFER_ISOC &&
|
|
|
|
urb->number_of_packets > 0) {
|
2007-02-25 03:27:33 +00:00
|
|
|
if ((ndesc = urb->number_of_packets) > ISODESC_MAX)
|
|
|
|
ndesc = ISODESC_MAX;
|
|
|
|
fp = urb->iso_frame_desc;
|
|
|
|
dp = ep->isodesc;
|
|
|
|
for (i = 0; i < ndesc; i++) {
|
|
|
|
dp->status = fp->status;
|
|
|
|
dp->offset = fp->offset;
|
|
|
|
dp->length = (ev_type == 'S') ?
|
|
|
|
fp->length : fp->actual_length;
|
|
|
|
fp++;
|
|
|
|
dp++;
|
|
|
|
}
|
2011-02-04 05:01:36 +00:00
|
|
|
/* Wasteful, but simple to understand: ISO 'C' is sparse. */
|
|
|
|
if (ev_type == 'C')
|
|
|
|
ep->length = urb->transfer_buffer_length;
|
2007-02-25 03:27:33 +00:00
|
|
|
}
|
|
|
|
|
2006-08-30 15:35:21 +00:00
|
|
|
ep->setup_flag = mon_text_get_setup(ep, urb, ev_type, rp->r.m_bus);
|
|
|
|
ep->data_flag = mon_text_get_data(ep, urb, ep->length, ev_type,
|
|
|
|
rp->r.m_bus);
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
rp->nevents++;
|
|
|
|
list_add_tail(&ep->e_link, &rp->e_list);
|
|
|
|
wake_up(&rp->wait);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void mon_text_submit(void *data, struct urb *urb)
|
|
|
|
{
|
|
|
|
struct mon_reader_text *rp = data;
|
2007-08-24 19:41:41 +00:00
|
|
|
mon_text_event(rp, urb, 'S', -EINPROGRESS);
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
|
2007-08-24 19:41:41 +00:00
|
|
|
static void mon_text_complete(void *data, struct urb *urb, int status)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
|
|
|
struct mon_reader_text *rp = data;
|
2007-08-24 19:41:41 +00:00
|
|
|
mon_text_event(rp, urb, 'C', status);
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
|
2006-06-10 05:03:32 +00:00
|
|
|
static void mon_text_error(void *data, struct urb *urb, int error)
|
|
|
|
{
|
|
|
|
struct mon_reader_text *rp = data;
|
|
|
|
struct mon_event_text *ep;
|
|
|
|
|
|
|
|
if (rp->nevents >= EVENT_MAX ||
|
2006-12-07 04:33:16 +00:00
|
|
|
(ep = kmem_cache_alloc(rp->e_slab, GFP_ATOMIC)) == NULL) {
|
2006-06-10 05:03:32 +00:00
|
|
|
rp->r.m_bus->cnt_text_lost++;
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
ep->type = 'E';
|
|
|
|
ep->id = (unsigned long) urb;
|
2010-01-05 18:50:07 +00:00
|
|
|
ep->busnum = urb->dev->bus->busnum;
|
2007-07-30 21:10:36 +00:00
|
|
|
ep->devnum = urb->dev->devnum;
|
|
|
|
ep->epnum = usb_endpoint_num(&urb->ep->desc);
|
|
|
|
ep->xfertype = usb_endpoint_type(&urb->ep->desc);
|
|
|
|
ep->is_in = usb_urb_dir_in(urb);
|
2010-01-05 18:50:07 +00:00
|
|
|
ep->tstamp = mon_get_timestamp();
|
2006-06-10 05:03:32 +00:00
|
|
|
ep->length = 0;
|
|
|
|
ep->status = error;
|
|
|
|
|
|
|
|
ep->setup_flag = '-';
|
|
|
|
ep->data_flag = 'E';
|
|
|
|
|
|
|
|
rp->nevents++;
|
|
|
|
list_add_tail(&ep->e_link, &rp->e_list);
|
|
|
|
wake_up(&rp->wait);
|
|
|
|
}
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
/*
|
|
|
|
* Fetch next event from the circular buffer.
|
|
|
|
*/
|
|
|
|
static struct mon_event_text *mon_text_fetch(struct mon_reader_text *rp,
|
|
|
|
struct mon_bus *mbus)
|
|
|
|
{
|
|
|
|
struct list_head *p;
|
|
|
|
unsigned long flags;
|
|
|
|
|
|
|
|
spin_lock_irqsave(&mbus->lock, flags);
|
|
|
|
if (list_empty(&rp->e_list)) {
|
|
|
|
spin_unlock_irqrestore(&mbus->lock, flags);
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
p = rp->e_list.next;
|
|
|
|
list_del(p);
|
|
|
|
--rp->nevents;
|
|
|
|
spin_unlock_irqrestore(&mbus->lock, flags);
|
|
|
|
return list_entry(p, struct mon_event_text, e_link);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
*/
|
|
|
|
static int mon_text_open(struct inode *inode, struct file *file)
|
|
|
|
{
|
|
|
|
struct mon_bus *mbus;
|
|
|
|
struct mon_reader_text *rp;
|
|
|
|
int rc;
|
|
|
|
|
2006-01-11 14:55:29 +00:00
|
|
|
mutex_lock(&mon_lock);
|
2006-09-27 08:50:46 +00:00
|
|
|
mbus = inode->i_private;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2006-02-27 20:29:43 +00:00
|
|
|
rp = kzalloc(sizeof(struct mon_reader_text), GFP_KERNEL);
|
2005-04-16 22:20:36 +00:00
|
|
|
if (rp == NULL) {
|
|
|
|
rc = -ENOMEM;
|
|
|
|
goto err_alloc;
|
|
|
|
}
|
|
|
|
INIT_LIST_HEAD(&rp->e_list);
|
|
|
|
init_waitqueue_head(&rp->wait);
|
2006-01-11 14:55:29 +00:00
|
|
|
mutex_init(&rp->printf_lock);
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
rp->printf_size = PRINTF_DFL;
|
|
|
|
rp->printf_buf = kmalloc(rp->printf_size, GFP_KERNEL);
|
|
|
|
if (rp->printf_buf == NULL) {
|
|
|
|
rc = -ENOMEM;
|
|
|
|
goto err_alloc_pr;
|
|
|
|
}
|
|
|
|
|
|
|
|
rp->r.m_bus = mbus;
|
|
|
|
rp->r.r_data = rp;
|
|
|
|
rp->r.rnf_submit = mon_text_submit;
|
2006-06-10 05:03:32 +00:00
|
|
|
rp->r.rnf_error = mon_text_error;
|
2005-04-16 22:20:36 +00:00
|
|
|
rp->r.rnf_complete = mon_text_complete;
|
|
|
|
|
2007-04-11 20:47:26 +00:00
|
|
|
snprintf(rp->slab_name, SLAB_NAME_SZ, "mon_text_%p", rp);
|
2005-04-16 22:20:36 +00:00
|
|
|
rp->e_slab = kmem_cache_create(rp->slab_name,
|
|
|
|
sizeof(struct mon_event_text), sizeof(long), 0,
|
2007-07-20 01:11:58 +00:00
|
|
|
mon_text_ctor);
|
2005-04-16 22:20:36 +00:00
|
|
|
if (rp->e_slab == NULL) {
|
|
|
|
rc = -ENOMEM;
|
|
|
|
goto err_slab;
|
|
|
|
}
|
|
|
|
|
|
|
|
mon_reader_add(mbus, &rp->r);
|
|
|
|
|
|
|
|
file->private_data = rp;
|
2006-01-11 14:55:29 +00:00
|
|
|
mutex_unlock(&mon_lock);
|
2005-04-16 22:20:36 +00:00
|
|
|
return 0;
|
|
|
|
|
|
|
|
// err_busy:
|
|
|
|
// kmem_cache_destroy(rp->e_slab);
|
|
|
|
err_slab:
|
|
|
|
kfree(rp->printf_buf);
|
|
|
|
err_alloc_pr:
|
|
|
|
kfree(rp);
|
|
|
|
err_alloc:
|
2006-01-11 14:55:29 +00:00
|
|
|
mutex_unlock(&mon_lock);
|
2005-04-16 22:20:36 +00:00
|
|
|
return rc;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* For simplicity, we read one record in one system call and throw out
|
|
|
|
* what does not fit. This means that the following does not work:
|
|
|
|
* dd if=/dbg/usbmon/0t bs=10
|
|
|
|
* Also, we do not allow seeks and do not bother advancing the offset.
|
|
|
|
*/
|
2007-02-25 03:27:33 +00:00
|
|
|
static ssize_t mon_text_read_t(struct file *file, char __user *buf,
|
|
|
|
size_t nbytes, loff_t *ppos)
|
|
|
|
{
|
|
|
|
struct mon_reader_text *rp = file->private_data;
|
|
|
|
struct mon_event_text *ep;
|
|
|
|
struct mon_text_ptr ptr;
|
|
|
|
|
|
|
|
if (IS_ERR(ep = mon_text_read_wait(rp, file)))
|
|
|
|
return PTR_ERR(ep);
|
|
|
|
mutex_lock(&rp->printf_lock);
|
|
|
|
ptr.cnt = 0;
|
|
|
|
ptr.pbuf = rp->printf_buf;
|
|
|
|
ptr.limit = rp->printf_size;
|
|
|
|
|
|
|
|
mon_text_read_head_t(rp, &ptr, ep);
|
|
|
|
mon_text_read_statset(rp, &ptr, ep);
|
|
|
|
ptr.cnt += snprintf(ptr.pbuf + ptr.cnt, ptr.limit - ptr.cnt,
|
|
|
|
" %d", ep->length);
|
|
|
|
mon_text_read_data(rp, &ptr, ep);
|
|
|
|
|
|
|
|
if (copy_to_user(buf, rp->printf_buf, ptr.cnt))
|
|
|
|
ptr.cnt = -EFAULT;
|
|
|
|
mutex_unlock(&rp->printf_lock);
|
|
|
|
kmem_cache_free(rp->e_slab, ep);
|
|
|
|
return ptr.cnt;
|
|
|
|
}
|
|
|
|
|
|
|
|
static ssize_t mon_text_read_u(struct file *file, char __user *buf,
|
2005-04-16 22:20:36 +00:00
|
|
|
size_t nbytes, loff_t *ppos)
|
|
|
|
{
|
|
|
|
struct mon_reader_text *rp = file->private_data;
|
2007-02-25 03:27:33 +00:00
|
|
|
struct mon_event_text *ep;
|
|
|
|
struct mon_text_ptr ptr;
|
|
|
|
|
|
|
|
if (IS_ERR(ep = mon_text_read_wait(rp, file)))
|
|
|
|
return PTR_ERR(ep);
|
|
|
|
mutex_lock(&rp->printf_lock);
|
|
|
|
ptr.cnt = 0;
|
|
|
|
ptr.pbuf = rp->printf_buf;
|
|
|
|
ptr.limit = rp->printf_size;
|
|
|
|
|
|
|
|
mon_text_read_head_u(rp, &ptr, ep);
|
|
|
|
if (ep->type == 'E') {
|
|
|
|
mon_text_read_statset(rp, &ptr, ep);
|
2007-07-30 21:10:36 +00:00
|
|
|
} else if (ep->xfertype == USB_ENDPOINT_XFER_ISOC) {
|
2007-02-25 03:27:33 +00:00
|
|
|
mon_text_read_isostat(rp, &ptr, ep);
|
|
|
|
mon_text_read_isodesc(rp, &ptr, ep);
|
2007-07-30 21:10:36 +00:00
|
|
|
} else if (ep->xfertype == USB_ENDPOINT_XFER_INT) {
|
2007-02-25 03:27:33 +00:00
|
|
|
mon_text_read_intstat(rp, &ptr, ep);
|
|
|
|
} else {
|
|
|
|
mon_text_read_statset(rp, &ptr, ep);
|
|
|
|
}
|
|
|
|
ptr.cnt += snprintf(ptr.pbuf + ptr.cnt, ptr.limit - ptr.cnt,
|
|
|
|
" %d", ep->length);
|
|
|
|
mon_text_read_data(rp, &ptr, ep);
|
|
|
|
|
|
|
|
if (copy_to_user(buf, rp->printf_buf, ptr.cnt))
|
|
|
|
ptr.cnt = -EFAULT;
|
|
|
|
mutex_unlock(&rp->printf_lock);
|
|
|
|
kmem_cache_free(rp->e_slab, ep);
|
|
|
|
return ptr.cnt;
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct mon_event_text *mon_text_read_wait(struct mon_reader_text *rp,
|
|
|
|
struct file *file)
|
|
|
|
{
|
2005-04-16 22:20:36 +00:00
|
|
|
struct mon_bus *mbus = rp->r.m_bus;
|
|
|
|
DECLARE_WAITQUEUE(waita, current);
|
|
|
|
struct mon_event_text *ep;
|
|
|
|
|
|
|
|
add_wait_queue(&rp->wait, &waita);
|
|
|
|
set_current_state(TASK_INTERRUPTIBLE);
|
|
|
|
while ((ep = mon_text_fetch(rp, mbus)) == NULL) {
|
|
|
|
if (file->f_flags & O_NONBLOCK) {
|
|
|
|
set_current_state(TASK_RUNNING);
|
|
|
|
remove_wait_queue(&rp->wait, &waita);
|
2007-02-25 03:27:33 +00:00
|
|
|
return ERR_PTR(-EWOULDBLOCK);
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
/*
|
|
|
|
* We do not count nwaiters, because ->release is supposed
|
|
|
|
* to be called when all openers are gone only.
|
|
|
|
*/
|
|
|
|
schedule();
|
|
|
|
if (signal_pending(current)) {
|
|
|
|
remove_wait_queue(&rp->wait, &waita);
|
2007-02-25 03:27:33 +00:00
|
|
|
return ERR_PTR(-EINTR);
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
set_current_state(TASK_INTERRUPTIBLE);
|
|
|
|
}
|
|
|
|
set_current_state(TASK_RUNNING);
|
|
|
|
remove_wait_queue(&rp->wait, &waita);
|
2007-02-25 03:27:33 +00:00
|
|
|
return ep;
|
|
|
|
}
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2007-02-25 03:27:33 +00:00
|
|
|
static void mon_text_read_head_t(struct mon_reader_text *rp,
|
|
|
|
struct mon_text_ptr *p, const struct mon_event_text *ep)
|
|
|
|
{
|
|
|
|
char udir, utype;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2007-07-30 21:10:36 +00:00
|
|
|
udir = (ep->is_in ? 'i' : 'o');
|
|
|
|
switch (ep->xfertype) {
|
|
|
|
case USB_ENDPOINT_XFER_ISOC: utype = 'Z'; break;
|
|
|
|
case USB_ENDPOINT_XFER_INT: utype = 'I'; break;
|
|
|
|
case USB_ENDPOINT_XFER_CONTROL: utype = 'C'; break;
|
2005-04-16 22:20:36 +00:00
|
|
|
default: /* PIPE_BULK */ utype = 'B';
|
|
|
|
}
|
2007-02-25 03:27:33 +00:00
|
|
|
p->cnt += snprintf(p->pbuf + p->cnt, p->limit - p->cnt,
|
2005-06-25 21:32:59 +00:00
|
|
|
"%lx %u %c %c%c:%03u:%02u",
|
2005-04-16 22:20:36 +00:00
|
|
|
ep->id, ep->tstamp, ep->type,
|
2007-07-30 21:10:36 +00:00
|
|
|
utype, udir, ep->devnum, ep->epnum);
|
2007-02-25 03:27:33 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static void mon_text_read_head_u(struct mon_reader_text *rp,
|
|
|
|
struct mon_text_ptr *p, const struct mon_event_text *ep)
|
|
|
|
{
|
|
|
|
char udir, utype;
|
|
|
|
|
2007-07-30 21:10:36 +00:00
|
|
|
udir = (ep->is_in ? 'i' : 'o');
|
|
|
|
switch (ep->xfertype) {
|
|
|
|
case USB_ENDPOINT_XFER_ISOC: utype = 'Z'; break;
|
|
|
|
case USB_ENDPOINT_XFER_INT: utype = 'I'; break;
|
|
|
|
case USB_ENDPOINT_XFER_CONTROL: utype = 'C'; break;
|
2007-02-25 03:27:33 +00:00
|
|
|
default: /* PIPE_BULK */ utype = 'B';
|
|
|
|
}
|
|
|
|
p->cnt += snprintf(p->pbuf + p->cnt, p->limit - p->cnt,
|
|
|
|
"%lx %u %c %c%c:%d:%03u:%u",
|
|
|
|
ep->id, ep->tstamp, ep->type,
|
2007-07-30 21:10:36 +00:00
|
|
|
utype, udir, ep->busnum, ep->devnum, ep->epnum);
|
2007-02-25 03:27:33 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static void mon_text_read_statset(struct mon_reader_text *rp,
|
|
|
|
struct mon_text_ptr *p, const struct mon_event_text *ep)
|
|
|
|
{
|
2005-06-25 21:32:59 +00:00
|
|
|
|
|
|
|
if (ep->setup_flag == 0) { /* Setup packet is present and captured */
|
2007-02-25 03:27:33 +00:00
|
|
|
p->cnt += snprintf(p->pbuf + p->cnt, p->limit - p->cnt,
|
2005-06-25 21:32:59 +00:00
|
|
|
" s %02x %02x %04x %04x %04x",
|
|
|
|
ep->setup[0],
|
|
|
|
ep->setup[1],
|
|
|
|
(ep->setup[3] << 8) | ep->setup[2],
|
|
|
|
(ep->setup[5] << 8) | ep->setup[4],
|
|
|
|
(ep->setup[7] << 8) | ep->setup[6]);
|
|
|
|
} else if (ep->setup_flag != '-') { /* Unable to capture setup packet */
|
2007-02-25 03:27:33 +00:00
|
|
|
p->cnt += snprintf(p->pbuf + p->cnt, p->limit - p->cnt,
|
2005-06-25 21:32:59 +00:00
|
|
|
" %c __ __ ____ ____ ____", ep->setup_flag);
|
|
|
|
} else { /* No setup for this kind of URB */
|
2007-02-25 03:27:33 +00:00
|
|
|
p->cnt += snprintf(p->pbuf + p->cnt, p->limit - p->cnt,
|
|
|
|
" %d", ep->status);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void mon_text_read_intstat(struct mon_reader_text *rp,
|
|
|
|
struct mon_text_ptr *p, const struct mon_event_text *ep)
|
|
|
|
{
|
|
|
|
p->cnt += snprintf(p->pbuf + p->cnt, p->limit - p->cnt,
|
|
|
|
" %d:%d", ep->status, ep->interval);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void mon_text_read_isostat(struct mon_reader_text *rp,
|
|
|
|
struct mon_text_ptr *p, const struct mon_event_text *ep)
|
|
|
|
{
|
|
|
|
if (ep->type == 'S') {
|
|
|
|
p->cnt += snprintf(p->pbuf + p->cnt, p->limit - p->cnt,
|
|
|
|
" %d:%d:%d", ep->status, ep->interval, ep->start_frame);
|
|
|
|
} else {
|
|
|
|
p->cnt += snprintf(p->pbuf + p->cnt, p->limit - p->cnt,
|
|
|
|
" %d:%d:%d:%d",
|
|
|
|
ep->status, ep->interval, ep->start_frame, ep->error_count);
|
2005-06-25 21:32:59 +00:00
|
|
|
}
|
2007-02-25 03:27:33 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static void mon_text_read_isodesc(struct mon_reader_text *rp,
|
|
|
|
struct mon_text_ptr *p, const struct mon_event_text *ep)
|
|
|
|
{
|
|
|
|
int ndesc; /* Display this many */
|
|
|
|
int i;
|
|
|
|
const struct mon_iso_desc *dp;
|
|
|
|
|
|
|
|
p->cnt += snprintf(p->pbuf + p->cnt, p->limit - p->cnt,
|
|
|
|
" %d", ep->numdesc);
|
|
|
|
ndesc = ep->numdesc;
|
|
|
|
if (ndesc > ISODESC_MAX)
|
|
|
|
ndesc = ISODESC_MAX;
|
|
|
|
if (ndesc < 0)
|
|
|
|
ndesc = 0;
|
|
|
|
dp = ep->isodesc;
|
|
|
|
for (i = 0; i < ndesc; i++) {
|
|
|
|
p->cnt += snprintf(p->pbuf + p->cnt, p->limit - p->cnt,
|
|
|
|
" %d:%u:%u", dp->status, dp->offset, dp->length);
|
|
|
|
dp++;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void mon_text_read_data(struct mon_reader_text *rp,
|
|
|
|
struct mon_text_ptr *p, const struct mon_event_text *ep)
|
|
|
|
{
|
|
|
|
int data_len, i;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
if ((data_len = ep->length) > 0) {
|
|
|
|
if (ep->data_flag == 0) {
|
2007-02-25 03:27:33 +00:00
|
|
|
p->cnt += snprintf(p->pbuf + p->cnt, p->limit - p->cnt,
|
|
|
|
" =");
|
2005-04-16 22:20:36 +00:00
|
|
|
if (data_len >= DATA_MAX)
|
|
|
|
data_len = DATA_MAX;
|
|
|
|
for (i = 0; i < data_len; i++) {
|
|
|
|
if (i % 4 == 0) {
|
2007-02-25 03:27:33 +00:00
|
|
|
p->cnt += snprintf(p->pbuf + p->cnt,
|
|
|
|
p->limit - p->cnt,
|
2005-04-16 22:20:36 +00:00
|
|
|
" ");
|
|
|
|
}
|
2007-02-25 03:27:33 +00:00
|
|
|
p->cnt += snprintf(p->pbuf + p->cnt,
|
|
|
|
p->limit - p->cnt,
|
2005-04-16 22:20:36 +00:00
|
|
|
"%02x", ep->data[i]);
|
|
|
|
}
|
2007-02-25 03:27:33 +00:00
|
|
|
p->cnt += snprintf(p->pbuf + p->cnt, p->limit - p->cnt,
|
|
|
|
"\n");
|
2005-04-16 22:20:36 +00:00
|
|
|
} else {
|
2007-02-25 03:27:33 +00:00
|
|
|
p->cnt += snprintf(p->pbuf + p->cnt, p->limit - p->cnt,
|
2005-04-16 22:20:36 +00:00
|
|
|
" %c\n", ep->data_flag);
|
|
|
|
}
|
|
|
|
} else {
|
2007-02-25 03:27:33 +00:00
|
|
|
p->cnt += snprintf(p->pbuf + p->cnt, p->limit - p->cnt, "\n");
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static int mon_text_release(struct inode *inode, struct file *file)
|
|
|
|
{
|
|
|
|
struct mon_reader_text *rp = file->private_data;
|
|
|
|
struct mon_bus *mbus;
|
|
|
|
/* unsigned long flags; */
|
|
|
|
struct list_head *p;
|
|
|
|
struct mon_event_text *ep;
|
|
|
|
|
2006-01-11 14:55:29 +00:00
|
|
|
mutex_lock(&mon_lock);
|
2006-09-27 08:50:46 +00:00
|
|
|
mbus = inode->i_private;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
if (mbus->nreaders <= 0) {
|
|
|
|
printk(KERN_ERR TAG ": consistency error on close\n");
|
2006-01-11 14:55:29 +00:00
|
|
|
mutex_unlock(&mon_lock);
|
2005-04-16 22:20:36 +00:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
mon_reader_del(mbus, &rp->r);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* In theory, e_list is protected by mbus->lock. However,
|
|
|
|
* after mon_reader_del has finished, the following is the case:
|
|
|
|
* - we are not on reader list anymore, so new events won't be added;
|
|
|
|
* - whole mbus may be dropped if it was orphaned.
|
|
|
|
* So, we better not touch mbus.
|
|
|
|
*/
|
|
|
|
/* spin_lock_irqsave(&mbus->lock, flags); */
|
|
|
|
while (!list_empty(&rp->e_list)) {
|
|
|
|
p = rp->e_list.next;
|
|
|
|
ep = list_entry(p, struct mon_event_text, e_link);
|
|
|
|
list_del(p);
|
|
|
|
--rp->nevents;
|
|
|
|
kmem_cache_free(rp->e_slab, ep);
|
|
|
|
}
|
|
|
|
/* spin_unlock_irqrestore(&mbus->lock, flags); */
|
|
|
|
|
|
|
|
kmem_cache_destroy(rp->e_slab);
|
|
|
|
kfree(rp->printf_buf);
|
|
|
|
kfree(rp);
|
|
|
|
|
2006-01-11 14:55:29 +00:00
|
|
|
mutex_unlock(&mon_lock);
|
2005-04-16 22:20:36 +00:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2007-02-25 03:27:33 +00:00
|
|
|
static const struct file_operations mon_fops_text_t = {
|
2005-04-16 22:20:36 +00:00
|
|
|
.owner = THIS_MODULE,
|
|
|
|
.open = mon_text_open,
|
|
|
|
.llseek = no_llseek,
|
2007-02-25 03:27:33 +00:00
|
|
|
.read = mon_text_read_t,
|
|
|
|
.release = mon_text_release,
|
|
|
|
};
|
|
|
|
|
|
|
|
static const struct file_operations mon_fops_text_u = {
|
|
|
|
.owner = THIS_MODULE,
|
|
|
|
.open = mon_text_open,
|
|
|
|
.llseek = no_llseek,
|
|
|
|
.read = mon_text_read_u,
|
2005-04-16 22:20:36 +00:00
|
|
|
.release = mon_text_release,
|
|
|
|
};
|
|
|
|
|
2007-05-03 23:51:16 +00:00
|
|
|
int mon_text_add(struct mon_bus *mbus, const 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
|
|
|
{
|
|
|
|
struct dentry *d;
|
|
|
|
enum { NAMESZ = 10 };
|
|
|
|
char name[NAMESZ];
|
2007-05-03 23:51:16 +00:00
|
|
|
int busnum = ubus? ubus->busnum: 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
|
|
|
int rc;
|
|
|
|
|
2011-07-07 07:28:21 +00:00
|
|
|
if (mon_dir == NULL)
|
|
|
|
return 0;
|
|
|
|
|
2007-05-03 23:51:16 +00:00
|
|
|
if (ubus != NULL) {
|
|
|
|
rc = snprintf(name, NAMESZ, "%dt", busnum);
|
|
|
|
if (rc <= 0 || rc >= NAMESZ)
|
|
|
|
goto err_print_t;
|
|
|
|
d = debugfs_create_file(name, 0600, mon_dir, mbus,
|
|
|
|
&mon_fops_text_t);
|
|
|
|
if (d == NULL)
|
|
|
|
goto err_create_t;
|
|
|
|
mbus->dent_t = d;
|
|
|
|
}
|
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
|
|
|
|
2007-04-11 20:47:26 +00:00
|
|
|
rc = snprintf(name, NAMESZ, "%du", busnum);
|
2007-02-25 03:27:33 +00:00
|
|
|
if (rc <= 0 || rc >= NAMESZ)
|
|
|
|
goto err_print_u;
|
|
|
|
d = debugfs_create_file(name, 0600, mon_dir, mbus, &mon_fops_text_u);
|
|
|
|
if (d == NULL)
|
|
|
|
goto err_create_u;
|
|
|
|
mbus->dent_u = d;
|
|
|
|
|
2007-04-11 20:47:26 +00:00
|
|
|
rc = snprintf(name, NAMESZ, "%ds", busnum);
|
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 <= 0 || rc >= NAMESZ)
|
|
|
|
goto err_print_s;
|
|
|
|
d = debugfs_create_file(name, 0600, mon_dir, mbus, &mon_fops_stat);
|
|
|
|
if (d == NULL)
|
|
|
|
goto err_create_s;
|
|
|
|
mbus->dent_s = d;
|
|
|
|
|
|
|
|
return 1;
|
|
|
|
|
|
|
|
err_create_s:
|
|
|
|
err_print_s:
|
2007-02-25 03:27:33 +00:00
|
|
|
debugfs_remove(mbus->dent_u);
|
|
|
|
mbus->dent_u = NULL;
|
|
|
|
err_create_u:
|
|
|
|
err_print_u:
|
2007-05-03 23:51:16 +00:00
|
|
|
if (ubus != NULL) {
|
|
|
|
debugfs_remove(mbus->dent_t);
|
|
|
|
mbus->dent_t = NULL;
|
|
|
|
}
|
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_create_t:
|
|
|
|
err_print_t:
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
void mon_text_del(struct mon_bus *mbus)
|
|
|
|
{
|
2007-02-25 03:27:33 +00:00
|
|
|
debugfs_remove(mbus->dent_u);
|
2007-05-03 23:51:16 +00:00
|
|
|
if (mbus->dent_t != NULL)
|
|
|
|
debugfs_remove(mbus->dent_t);
|
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
|
|
|
debugfs_remove(mbus->dent_s);
|
|
|
|
}
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
/*
|
|
|
|
* Slab interface: constructor.
|
|
|
|
*/
|
2008-07-26 02:45:34 +00:00
|
|
|
static void mon_text_ctor(void *mem)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
|
|
|
/*
|
|
|
|
* Nothing to initialize. No, really!
|
|
|
|
* So, we fill it with garbage to emulate a reused object.
|
|
|
|
*/
|
|
|
|
memset(mem, 0xe5, sizeof(struct mon_event_text));
|
|
|
|
}
|
|
|
|
|
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 __init mon_text_init(void)
|
|
|
|
{
|
|
|
|
struct dentry *mondir;
|
|
|
|
|
2009-04-24 22:15:49 +00:00
|
|
|
mondir = debugfs_create_dir("usbmon", usb_debug_root);
|
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 (IS_ERR(mondir)) {
|
2011-07-07 07:28:21 +00:00
|
|
|
/* debugfs not available, but we can use usbmon without it */
|
|
|
|
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
|
|
|
}
|
|
|
|
if (mondir == NULL) {
|
|
|
|
printk(KERN_NOTICE TAG ": unable to create usbmon directory\n");
|
2011-07-07 07:28:21 +00:00
|
|
|
return -ENOMEM;
|
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_dir = mondir;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2007-02-20 18:37:52 +00:00
|
|
|
void mon_text_exit(void)
|
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
|
|
|
{
|
|
|
|
debugfs_remove(mon_dir);
|
|
|
|
}
|