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usbmon: bus zero

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Add the "bus zero" feature to the usbmon. If a user process specifies bus
with number zero, it receives events from all buses. This is useful when
we wish to see initial enumeration when a bus is created, typically after
a modprobe. Until now, an application had to loop until a new bus could
be open, then start capturing on it. This procedure was cumbersome and
could lose initial events. Also, often it's too bothersome to find exactly
to which bus a specific device is attached.

Paolo Albeni provided the original concept implementation. I added the
handling of "bus->monitored" flag and generally fixed it up.

Signed-off-by: Pete Zaitcev <zaitcev@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Pete Zaitcev
2007-04-11 13:47:26 -07:00
committed by Greg Kroah-Hartman
parent 35d07fd58f
commit ecb658d387
4 changed files with 116 additions and 84 deletions
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14
drivers/usb/mon/mon_bin.c
View File

@@ -356,8 +356,10 @@ static inline char mon_bin_get_setup(unsigned char *setupb,
if (!usb_pipecontrol(urb->pipe) || ev_type != 'S')
return '-';
if (urb->transfer_flags & URB_NO_SETUP_DMA_MAP)
if (urb->dev->bus->uses_dma &&
(urb->transfer_flags & URB_NO_SETUP_DMA_MAP)) {
return mon_dmapeek(setupb, urb->setup_dma, SETUP_LEN);
}
if (urb->setup_packet == NULL)
return 'Z';
@@ -369,7 +371,8 @@ static char mon_bin_get_data(const struct mon_reader_bin *rp,
unsigned int offset, struct urb *urb, unsigned int length)
{
if (urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP) {
if (urb->dev->bus->uses_dma &&
(urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP)) {
mon_dmapeek_vec(rp, offset, urb->transfer_dma, length);
return 0;
}
@@ -440,7 +443,7 @@ static void mon_bin_event(struct mon_reader_bin *rp, struct urb *urb,
/* We use the fact that usb_pipein() returns 0x80 */
ep->epnum = usb_pipeendpoint(urb->pipe) | usb_pipein(urb->pipe);
ep->devnum = usb_pipedevice(urb->pipe);
ep->busnum = rp->r.m_bus->u_bus->busnum;
ep->busnum = urb->dev->bus->busnum;
ep->id = (unsigned long) urb;
ep->ts_sec = ts.tv_sec;
ep->ts_usec = ts.tv_usec;
@@ -500,7 +503,7 @@ static void mon_bin_error(void *data, struct urb *urb, int error)
/* We use the fact that usb_pipein() returns 0x80 */
ep->epnum = usb_pipeendpoint(urb->pipe) | usb_pipein(urb->pipe);
ep->devnum = usb_pipedevice(urb->pipe);
ep->busnum = rp->r.m_bus->u_bus->busnum;
ep->busnum = urb->dev->bus->busnum;
ep->id = (unsigned long) urb;
ep->status = error;
@@ -515,7 +518,6 @@ static void mon_bin_error(void *data, struct urb *urb, int error)
static int mon_bin_open(struct inode *inode, struct file *file)
{
struct mon_bus *mbus;
struct usb_bus *ubus;
struct mon_reader_bin *rp;
size_t size;
int rc;
@@ -525,7 +527,7 @@ static int mon_bin_open(struct inode *inode, struct file *file)
mutex_unlock(&mon_lock);
return -ENODEV;
}
if ((ubus = mbus->u_bus) == NULL) {
if (mbus != &mon_bus0 && mbus->u_bus == NULL) {
printk(KERN_ERR TAG ": consistency error on open\n");
mutex_unlock(&mon_lock);
return -ENODEV;