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usbmon, next round
Hi, Paolo:
Here's what I have right now. It pretty much takes shape, only mmap is
remaining to be done. I'm basically going to copy your code there, only
change it from 4-space to 1-tab formatting.
This reminds me, I need your copyright statement for the banner comment.
Please send me one.
-- Pete
diff -uprN -X dontdiff linux-2.6.18/Documentation/usb/usbmon.txt
linux-2.6.18-ub/Documentation/usb/usbmon.txt
--- linux-2.6.18/Documentation/usb/usbmon.txt 2006-09-29 21:26:46.000000000 -0700
+++ linux-2.6.18-ub/Documentation/usb/usbmon.txt 2006-11-20 21:00:55.000000000 -0800
@@ -170,4 +170,37 @@ dd65f0e8 4128379808 C Bo:005:02 0 31 >
* Raw binary format and API
-TBD
+struct usbmon_packet {
+ u64 id; /* 0: URB ID - from submission to callback */
+ unsigned char type; /* 8: Same as text; extensible. */
+ unsigned char xfer_type; /* ISO, Intr, Control, Bulk; 0x80 IN */
+ unsigned char epnum; /* Endpoint number */
+ unsigned char devnum; /* Device address */
+ u16 busnum; /* 12: Bus number */
+ char flag_setup; /* 14: Same as text */
+ char flag_data; /* 15: Same as text; Binary zero is OK. */
+ s64 ts_sec; /* 16: gettimeofday */
+ s32 ts_usec; /* 24: gettimeofday */
+ int status; /* 28: */
+ unsigned int length; /* 32: Length of data (submitted or actual) */
+ unsigned int len_cap; /* 36: Delivered length */
+ unsigned char setup[8]; /* 40: Only for Control 'S' */
+}; /* 48 bytes total */
+
+Minor structure: 0 is "everything", the rest is bus number.
+
+-- ID leaks a kernel pointer (same as text API)
+ Since callbacks terminate, is likely to change to a real random or seq. ID
+-- Packets are aligned to 64 bytes.
+
+ioctl:
+ fetch (blocking)
+ FNBIO - bytes available (includes headers)
+ stats, loss
+ set buffer size
+ mfetch (for mmap)
+
+select/poll ok
+lseek: not working
+mmap:
+ ioctl mfetch returns array of ptrs, frees old buffers
diff -uprN -X dontdiff linux-2.6.18/drivers/usb/mon/Makefile
linux-2.6.18-ub/drivers/usb/mon/Makefile
--- linux-2.6.18/drivers/usb/mon/Makefile 2006-03-17 16:53:54.000000000 -0800
+++ linux-2.6.18-ub/drivers/usb/mon/Makefile 2006-11-09 19:35:05.000000000 -0800
@@ -2,7 +2,7 @@
# Makefile for USB Core files and filesystem
#
-usbmon-objs := mon_main.o mon_stat.o mon_text.o mon_dma.o
+usbmon-objs := mon_main.o mon_stat.o mon_text.o mon_bin.o mon_dma.o
# This does not use CONFIG_USB_MON because we want this to use a tristate.
obj-$(CONFIG_USB) += usbmon.o
diff -uprN -X dontdiff linux-2.6.18/drivers/usb/mon/mon_bin.c
linux-2.6.18-ub/drivers/usb/mon/mon_bin.c
--- linux-2.6.18/drivers/usb/mon/mon_bin.c 1969-12-31 16:00:00.000000000 -0800
+++ linux-2.6.18-ub/drivers/usb/mon/mon_bin.c 2006-11-21 21:41:37.000000000 -0800
@@ -0,0 +1,953 @@
+/*
+ * The USB Monitor, inspired by Dave Harding's USBMon.
+ *
+ * This is a binary format reader.
+ */
+
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/fs.h>
+#include <linux/cdev.h>
+#include <linux/usb.h>
+#include <linux/poll.h>
+
+#include <asm/uaccess.h>
+
+#include "usb_mon.h"
+
+/*
+ * Defined by USB 2.0 clause 9.3, table 9.2.
+ */
+#define SETUP_LEN 8
+
+/* ioctl macros */
+#define MON_IOC_MAGIC 0x92
+
+#define MON_IOCQ_URB_LEN _IO(MON_IOC_MAGIC, 1)
+#define MON_IOCX_URB _IOWR(MON_IOC_MAGIC, 2, struct mon_bin_hdr)
+#define MON_IOCG_STATS _IOR(MON_IOC_MAGIC, 3, struct mon_bin_stats)
+#define MON_IOCT_RING_SIZE _IO(MON_IOC_MAGIC, 4)
+#define MON_IOCQ_RING_SIZE _IO(MON_IOC_MAGIC, 5)
+#define MON_IOCX_GET _IOW(MON_IOC_MAGIC, 6, struct mon_bin_get)
+#ifdef CONFIG_COMPAT
+#define MON_IOCX_GET32 _IOW(MON_IOC_MAGIC, 6, struct mon_bin_get32)
+#endif
+
+/*
+ * Some architectures have enormous basic pages (16KB for ia64, 64KB for ppc).
+ * But it's all right. Just use a simple way to make sure the chunk is never
+ * smaller than a page.
+ *
+ * N.B. An application does not know our chunk size.
+ *
+ * Woops, get_zeroed_page() returns a single page. I guess we're stuck with
+ * page-sized chunks for the time being.
+ */
+#define CHUNK_SIZE PAGE_SIZE
+#define CHUNK_ALIGN(x) (((x)+CHUNK_SIZE-1) & ~(CHUNK_SIZE-1))
+
+/*
+ * The magic limit was calculated so that it allows the monitoring
+ * application to pick data once in two ticks. This way, another application,
+ * which presumably drives the bus, gets to hog CPU, yet we collect our data.
+ * If HZ is 100, a 480 mbit/s bus drives 614 KB every jiffy. USB has an
+ * enormous overhead built into the bus protocol, so we need about 1000 KB.
+ *
+ * This is still too much for most cases, where we just snoop a few
+ * descriptor fetches for enumeration. So, the default is a "reasonable"
+ * amount for systems with HZ=250 and incomplete bus saturation.
+ *
+ * XXX What about multi-megabyte URBs which take minutes to transfer?
+ */
+#define BUFF_MAX CHUNK_ALIGN(1200*1024)
+#define BUFF_DFL CHUNK_ALIGN(300*1024)
+#define BUFF_MIN CHUNK_ALIGN(8*1024)
+
+/*
+ * The per-event API header (2 per URB).
+ *
+ * This structure is seen in userland as defined by the documentation.
+ */
+struct mon_bin_hdr {
+ u64 id; /* URB ID - from submission to callback */
+ unsigned char type; /* Same as in text API; extensible. */
+ unsigned char xfer_type; /* ISO, Intr, Control, Bulk; 0x80 IN */
+ unsigned char epnum; /* Endpoint number */
+ unsigned char devnum; /* Device address */
+ unsigned short busnum; /* Bus number */
+ char flag_setup;
+ char flag_data;
+ s64 ts_sec; /* gettimeofday */
+ s32 ts_usec; /* gettimeofday */
+ int status;
+ unsigned int len_urb; /* Length of data (submitted or actual) */
+ unsigned int len_cap; /* Delivered length */
+ unsigned char setup[SETUP_LEN]; /* Only for Control S-type */
+};
+
+struct mon_bin_urb_info {
+ struct mon_bin_hdr hdr;
+ char * data;
+};
+
+/* per file statistic */
+struct mon_bin_stats {
+ u32 queued;
+ u32 dropped;
+};
+
+struct mon_bin_get {
+ struct mon_bin_hdr __user *hdr; /* Only 48 bytes, not 64. */
+ void __user *data;
+ size_t alloc; /* Length of data (can be zero) */
+};
+
+#ifdef CONFIG_COMPAT
+struct mon_bin_get32 {
+ u32 hdr32;
+ u32 data32;
+ u32 alloc32;
+};
+#endif
+
+/* Having these two values same prevents wrapping of the mon_bin_hdr */
+#define PKT_ALIGN 64
+#define PKT_SIZE 64
+
+/* max number of USB bus supported */
+#define MON_BIN_MAX_MINOR 128
+
+/*
+ * The buffer: map of used pages.
+ */
+struct mon_pgmap {
+ struct page *pg;
+ unsigned char *ptr; /* XXX just use page_to_virt everywhere? */
+};
+
+/*
+ * This gets associated with an open file struct.
+ */
+struct mon_reader_bin {
+ /* The buffer: one per open. */
+ spinlock_t b_lock; /* Protect b_cnt, b_in */
+ unsigned int b_size; /* Current size of the buffer - bytes */
+ unsigned int b_cnt; /* Bytes used */
+ unsigned int b_in, b_out; /* Offsets into buffer - bytes */
+ unsigned int b_read; /* Amount of read data in curr. pkt. */
+ struct mon_pgmap *b_vec; /* The map array */
+ wait_queue_head_t b_wait; /* Wait for data here */
+
+ struct mutex fetch_lock; /* Protect b_read, b_out */
+ int mmap_active;
+
+ /* A list of these is needed for "bus 0". Some time later. */
+ struct mon_reader r;
+
+ /* Stats */
+ unsigned int nevents; /* Fill level, not counting fillers */
+ unsigned int cnt_lost;
+};
+
+static inline struct mon_bin_hdr *MON_OFF2HDR(const struct mon_reader_bin *rp,
+ unsigned int offset)
+{
+ return (struct mon_bin_hdr *)
+ (rp->b_vec[offset / CHUNK_SIZE].ptr + offset % CHUNK_SIZE);
+}
+
+#define MON_RING_EMPTY(rp) ((rp)->b_cnt == 0)
+
+static dev_t mon_bin_dev0;
+static struct cdev mon_bin_cdev;
+
+static void mon_buff_area_fill(const struct mon_reader_bin *rp,
+ unsigned int offset, unsigned int size);
+static int mon_alloc_buff(struct mon_pgmap *map, int npages);
+static void mon_free_buff(struct mon_pgmap *map, int npages);
+
+/*
+ * This is a "chunked memcpy". It does not manipulate any counters.
+ * But it returns the new offset for repeated application.
+ */
+unsigned int mon_copy_to_buff(const struct mon_reader_bin *this,
+ unsigned int off, const unsigned char *from, unsigned int length)
+{
+ unsigned int step_len;
+ unsigned char *buf;
+ unsigned int in_page;
+
+ while (length) {
+ /*
+ * Determine step_len.
+ */
+ step_len = length;
+ in_page = CHUNK_SIZE - (off & (CHUNK_SIZE-1));
+ if (in_page < step_len)
+ step_len = in_page;
+
+ /*
+ * Copy data and advance pointers.
+ */
+ buf = this->b_vec[off / CHUNK_SIZE].ptr + off % CHUNK_SIZE;
+ memcpy(buf, from, step_len);
+ if ((off += step_len) >= this->b_size) off = 0;
+ from += step_len;
+ length -= step_len;
+ }
+ return off;
+}
+
+/*
+ * This is a little worse than the above because it's "chunked copy_to_user".
+ * The return value is an error code, not an offset.
+ */
+static int copy_from_buf(const struct mon_reader_bin *this, unsigned int off,
+ char __user *to, int length)
+{
+ unsigned int step_len;
+ unsigned char *buf;
+ unsigned int in_page;
+
+ while (length) {
+ /*
+ * Determine step_len.
+ */
+ step_len = length;
+ in_page = CHUNK_SIZE - (off & (CHUNK_SIZE-1));
+ if (in_page < step_len)
+ step_len = in_page;
+
+ /*
+ * Copy data and advance pointers.
+ */
+ buf = this->b_vec[off / CHUNK_SIZE].ptr + off % CHUNK_SIZE;
+ if (copy_to_user(to, buf, step_len))
+ return -EINVAL;
+ if ((off += step_len) >= this->b_size) off = 0;
+ to += step_len;
+ length -= step_len;
+ }
+ return off;
+}
+
+/*
+ * Allocate an (aligned) area in the buffer.
+ * This is called under b_lock.
+ * Returns ~0 on failure.
+ */
+static unsigned int mon_buff_area_alloc(struct mon_reader_bin *rp,
+ unsigned int size)
+{
+ unsigned int offset;
+
+ size = (size + PKT_ALIGN-1) & ~(PKT_ALIGN-1);
+ if (rp->b_cnt + size > rp->b_size)
+ return ~0;
+ offset = rp->b_in;
+ rp->b_cnt += size;
+ if ((rp->b_in += size) >= rp->b_size)
+ rp->b_in -= rp->b_size;
+ return offset;
+}
+
+/*
+ * This is the same thing as mon_buff_area_alloc, only it does not allow
+ * buffers to wrap. This is needed by applications which pass references
+ * into mmap-ed buffers up their stacks (libpcap can do that).
+ *
+ * Currently, we always have the header stuck with the data, although
+ * it is not strictly speaking necessary.
+ *
+ * When a buffer would wrap, we place a filler packet to mark the space.
+ */
+static unsigned int mon_buff_area_alloc_contiguous(struct mon_reader_bin *rp,
+ unsigned int size)
+{
+ unsigned int offset;
+ unsigned int fill_size;
+
+ size = (size + PKT_ALIGN-1) & ~(PKT_ALIGN-1);
+ if (rp->b_cnt + size > rp->b_size)
+ return ~0;
+ if (rp->b_in + size > rp->b_size) {
+ /*
+ * This would wrap. Find if we still have space after
+ * skipping to the end of the buffer. If we do, place
+ * a filler packet and allocate a new packet.
+ */
+ fill_size = rp->b_size - rp->b_in;
+ if (rp->b_cnt + size + fill_size > rp->b_size)
+ return ~0;
+ mon_buff_area_fill(rp, rp->b_in, fill_size);
+
+ offset = 0;
+ rp->b_in = size;
+ rp->b_cnt += size + fill_size;
+ } else if (rp->b_in + size == rp->b_size) {
+ offset = rp->b_in;
+ rp->b_in = 0;
+ rp->b_cnt += size;
+ } else {
+ offset = rp->b_in;
+ rp->b_in += size;
+ rp->b_cnt += size;
+ }
+ return offset;
+}
+
+/*
+ * Return a few (kilo-)bytes to the head of the buffer.
+ * This is used if a DMA fetch fails.
+ */
+static void mon_buff_area_shrink(struct mon_reader_bin *rp, unsigned int size)
+{
+
+ size = (size + PKT_ALIGN-1) & ~(PKT_ALIGN-1);
+ rp->b_cnt -= size;
+ if (rp->b_in < size)
+ rp->b_in += rp->b_size;
+ rp->b_in -= size;
+}
+
+/*
+ * This has to be called under both b_lock and fetch_lock, because
+ * it accesses both b_cnt and b_out.
+ */
+static void mon_buff_area_free(struct mon_reader_bin *rp, unsigned int size)
+{
+
+ size = (size + PKT_ALIGN-1) & ~(PKT_ALIGN-1);
+ rp->b_cnt -= size;
+ if ((rp->b_out += size) >= rp->b_size)
+ rp->b_out -= rp->b_size;
+}
+
+static void mon_buff_area_fill(const struct mon_reader_bin *rp,
+ unsigned int offset, unsigned int size)
+{
+ struct mon_bin_hdr *ep;
+
+ ep = MON_OFF2HDR(rp, offset);
+ memset(ep, 0, PKT_SIZE);
+ ep->type = '@';
+ ep->len_cap = size - PKT_SIZE;
+}
+
+static inline char mon_bin_get_setup(unsigned char *setupb,
+ const struct urb *urb, char ev_type)
+{
+
+ if (!usb_pipecontrol(urb->pipe) || ev_type != 'S')
+ return '-';
+
+ if (urb->transfer_flags & URB_NO_SETUP_DMA_MAP)
+ return mon_dmapeek(setupb, urb->setup_dma, SETUP_LEN);
+ if (urb->setup_packet == NULL)
+ return 'Z';
+
+ memcpy(setupb, urb->setup_packet, SETUP_LEN);
+ return 0;
+}
+
+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) {
+ mon_dmapeek_vec(rp, offset, urb->transfer_dma, length);
+ return 0;
+ }
+
+ if (urb->transfer_buffer == NULL)
+ return 'Z';
+
+ mon_copy_to_buff(rp, offset, urb->transfer_buffer, length);
+ return 0;
+}
+
+static void mon_bin_event(struct mon_reader_bin *rp, struct urb *urb,
+ char ev_type)
+{
+ unsigned long flags;
+ struct timeval ts;
+ unsigned int urb_length;
+ unsigned int offset;
+ unsigned int length;
+ struct mon_bin_hdr *ep;
+ char data_tag = 0;
+
+ do_gettimeofday(&ts);
+
+ spin_lock_irqsave(&rp->b_lock, flags);
+
+ /*
+ * Find the maximum allowable length, then allocate space.
+ */
+ urb_length = (ev_type == 'S') ?
+ urb->transfer_buffer_length : urb->actual_length;
+ length = urb_length;
+
+ if (length >= rp->b_size/5)
+ length = rp->b_size/5;
+
+ if (usb_pipein(urb->pipe)) {
+ if (ev_type == 'S') {
+ length = 0;
+ data_tag = '<';
+ }
+ } else {
+ if (ev_type == 'C') {
+ length = 0;
+ data_tag = '>';
+ }
+ }
+
+ if (rp->mmap_active)
+ offset = mon_buff_area_alloc_contiguous(rp, length + PKT_SIZE);
+ else
+ offset = mon_buff_area_alloc(rp, length + PKT_SIZE);
+ if (offset == ~0) {
+ spin_unlock_irqrestore(&rp->b_lock, flags);
+ return;
+ }
+
+ ep = MON_OFF2HDR(rp, offset);
+ if ((offset += PKT_SIZE) >= rp->b_size) offset = 0;
+
+ /*
+ * Fill the allocated area.
+ */
+ memset(ep, 0, PKT_SIZE);
+ ep->type = ev_type;
+ /* We use the fact that usb_pipein() returns 0x80 */
+ ep->xfer_type = usb_pipetype(urb->pipe) | usb_pipein(urb->pipe);
+ ep->epnum = usb_pipeendpoint(urb->pipe);
+ ep->devnum = usb_pipedevice(urb->pipe);
+ ep->busnum = rp->r.m_bus->u_bus->busnum;
+ ep->id = (unsigned long) urb;
+ ep->ts_sec = ts.tv_sec;
+ ep->ts_usec = ts.tv_usec;
+ ep->status = urb->status;
+ ep->len_urb = urb_length;
+ ep->len_cap = length;
+
+ ep->flag_setup = mon_bin_get_setup(ep->setup, urb, ev_type);
+ if (length != 0) {
+ ep->flag_data = mon_bin_get_data(rp, offset, urb, length);
+ if (ep->flag_data != 0) { /* Yes, it's 0x00, not '0' */
+ ep->len_cap = 0;
+ mon_buff_area_shrink(rp, length);
+ }
+ } else {
+ ep->flag_data = data_tag;
+ }
+
+ rp->nevents++;
+ spin_unlock_irqrestore(&rp->b_lock, flags);
+
+ wake_up(&rp->b_wait);
+}
+
+static void mon_bin_submit(void *data, struct urb *urb)
+{
+ struct mon_reader_bin *rp = data;
+ mon_bin_event(rp, urb, 'S');
+}
+
+static void mon_bin_complete(void *data, struct urb *urb)
+{
+ struct mon_reader_bin *rp = data;
+ mon_bin_event(rp, urb, 'C');
+}
+
+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;
+
+ mutex_lock(&mon_lock);
+ if ((mbus = mon_bus_lookup(iminor(inode))) == NULL) {
+ mutex_unlock(&mon_lock);
+ return -ENODEV;
+ }
+ if ((ubus = mbus->u_bus) == NULL) {
+ printk(KERN_ERR TAG ": consistency error on open\n");
+ mutex_unlock(&mon_lock);
+ return -ENODEV;
+ }
+
+ rp = kzalloc(sizeof(struct mon_reader_bin), GFP_KERNEL);
+ if (rp == NULL) {
+ rc = -ENOMEM;
+ goto err_alloc;
+ }
+ spin_lock_init(&rp->b_lock);
+ init_waitqueue_head(&rp->b_wait);
+ mutex_init(&rp->fetch_lock);
+
+ rp->b_size = BUFF_DFL;
+
+ size = sizeof(struct mon_pgmap) * (rp->b_size/CHUNK_SIZE);
+ if ((rp->b_vec = kzalloc(size, GFP_KERNEL)) == NULL) {
+ rc = -ENOMEM;
+ goto err_allocvec;
+ }
+
+ if ((rc = mon_alloc_buff(rp->b_vec, rp->b_size/CHUNK_SIZE)) < 0)
+ goto err_allocbuff;
+
+ rp->r.m_bus = mbus;
+ rp->r.r_data = rp;
+ rp->r.rnf_submit = mon_bin_submit;
+ rp->r.rnf_error = mon_bin_error;
+ rp->r.rnf_complete = mon_bin_complete;
+
+ mon_reader_add(mbus, &rp->r);
+
+ file->private_data = rp;
+ mutex_unlock(&mon_lock);
+ return 0;
+
+err_allocbuff:
+ kfree(rp->b_vec);
+err_allocvec:
+ kfree(rp);
+err_alloc:
+ mutex_unlock(&mon_lock);
+ return rc;
+}
+
+/*
+ * Extract an event from buffer and copy it to user space.
+ * Wait if there is no event ready.
+ */
+static int mon_bin_get_event(struct file *file, struct mon_reader_bin *rp,
+ struct mon_bin_hdr __user *hdr, void __user *data, unsigned int nbytes)
+{
+ DECLARE_WAITQUEUE(waita, current);
+ unsigned long flags;
+ struct mon_bin_hdr *ep;
+ size_t step_len;
+ unsigned int offset;
+
+ mutex_lock(&rp->fetch_lock);
+
+ add_wait_queue(&rp->b_wait, &waita);
+ set_current_state(TASK_INTERRUPTIBLE);
+
+ spin_lock_irqsave(&rp->b_lock, flags);
+ while (!MON_RING_EMPTY(rp)) {
+ spin_unlock_irqrestore(&rp->b_lock, flags);
+
+ if (file->f_flags & O_NONBLOCK) {
+ set_current_state(TASK_RUNNING);
+ remove_wait_queue(&rp->b_wait, &waita);
+ return -EWOULDBLOCK; /* Same as EAGAIN in Linux */
+ }
+ schedule();
+ if (signal_pending(current)) {
+ remove_wait_queue(&rp->b_wait, &waita);
+ return -EINTR;
+ }
+ set_current_state(TASK_INTERRUPTIBLE);
+
+ spin_lock_irqsave(&rp->b_lock, flags);
+ }
+ spin_unlock_irqrestore(&rp->b_lock, flags);
+
+ set_current_state(TASK_RUNNING);
+ remove_wait_queue(&rp->b_wait, &waita);
+
+ ep = MON_OFF2HDR(rp, rp->b_out);
+
+ if (copy_to_user(hdr, ep, sizeof(struct mon_bin_hdr))) {
+ mutex_unlock(&rp->fetch_lock);
+ return -EFAULT;
+ }
+
+ step_len = min(ep->len_cap, nbytes);
+ if ((offset = rp->b_out + PKT_SIZE) >= rp->b_size) offset = 0;
+
+ if (copy_from_buf(rp, offset, data, step_len)) {
+ mutex_unlock(&rp->fetch_lock);
+ return -EFAULT;
+ }
+
+ spin_lock_irqsave(&rp->b_lock, flags);
+ mon_buff_area_free(rp, PKT_SIZE + ep->len_cap);
+ spin_unlock_irqrestore(&rp->b_lock, flags);
+ rp->b_read = 0;
+
+ mutex_unlock(&rp->fetch_lock);
+ return 0;
+}
+
+static int mon_bin_release(struct inode *inode, struct file *file)
+{
+ struct mon_reader_bin *rp = file->private_data;
+ struct mon_bus* mbus = rp->r.m_bus;
+
+ mutex_lock(&mon_lock);
+
+ if (mbus->nreaders <= 0) {
+ printk(KERN_ERR TAG ": consistency error on close\n");
+ mutex_unlock(&mon_lock);
+ return 0;
+ }
+ mon_reader_del(mbus, &rp->r);
+
+ mon_free_buff(rp->b_vec, rp->b_size/CHUNK_SIZE);
+ kfree(rp->b_vec);
+ kfree(rp);
+
+ mutex_unlock(&mon_lock);
+ return 0;
+}
+
+static ssize_t mon_bin_read(struct file *file, char __user *buf,
+ size_t nbytes, loff_t *ppos)
+{
+ struct mon_reader_bin *rp = file->private_data;
+ DECLARE_WAITQUEUE(waita, current);
+ unsigned long flags;
+ struct mon_bin_hdr *ep;
+ unsigned int offset;
+ size_t step_len;
+ char *ptr;
+ ssize_t done = 0;
+
+ mutex_lock(&rp->fetch_lock);
+
+ /* XXX Factor this out with mon_bin_get_event */
+ add_wait_queue(&rp->b_wait, &waita);
+ set_current_state(TASK_INTERRUPTIBLE);
+ spin_lock_irqsave(&rp->b_lock, flags);
+ while (!MON_RING_EMPTY(rp)) {
+ spin_unlock_irqrestore(&rp->b_lock, flags);
+ if (file->f_flags & O_NONBLOCK) {
+ set_current_state(TASK_RUNNING);
+ remove_wait_queue(&rp->b_wait, &waita);
+ return -EWOULDBLOCK; /* Same as EAGAIN in Linux */
+ }
+ schedule();
+ if (signal_pending(current)) {
+ remove_wait_queue(&rp->b_wait, &waita);
+ return -EINTR;
+ }
+ set_current_state(TASK_INTERRUPTIBLE);
+ spin_lock_irqsave(&rp->b_lock, flags);
+ }
+ spin_unlock_irqrestore(&rp->b_lock, flags);
+ set_current_state(TASK_RUNNING);
+ remove_wait_queue(&rp->b_wait, &waita);
+
+ ep = MON_OFF2HDR(rp, rp->b_out);
+
+ if (rp->b_read < sizeof(struct mon_bin_hdr)) {
+ step_len = min(nbytes, sizeof(struct mon_bin_hdr) - rp->b_read);
+ ptr = ((char *)ep) + rp->b_read;
+ if (step_len && copy_to_user(buf, ptr, step_len)) {
+ mutex_unlock(&rp->fetch_lock);
+ return -EFAULT;
+ }
+ nbytes -= step_len;
+ buf += step_len;
+ rp->b_read += step_len;
+ done += step_len;
+ }
+
+ if (rp->b_read >= sizeof(struct mon_bin_hdr)) {
+ step_len = min(nbytes, (size_t)ep->len_cap);
+ offset = rp->b_out + PKT_SIZE;
+ offset += rp->b_read - sizeof(struct mon_bin_hdr);
+ if (offset >= rp->b_size)
+ offset -= rp->b_size;
+ if (copy_from_buf(rp, offset, buf, step_len)) {
+ mutex_unlock(&rp->fetch_lock);
+ return -EFAULT;
+ }
+ nbytes -= step_len;
+ buf += step_len;
+ rp->b_read += step_len;
+ done += step_len;
+ }
+
+ /*
+ * Check if whole packet was read, and if so, jump to the next one.
+ */
+ if (rp->b_read >= sizeof(struct mon_bin_hdr) + ep->len_cap) {
+ spin_lock_irqsave(&rp->b_lock, flags);
+ mon_buff_area_free(rp, PKT_SIZE + ep->len_cap);
+ spin_unlock_irqrestore(&rp->b_lock, flags);
+ rp->b_read = 0;
+ }
+
+ mutex_unlock(&rp->fetch_lock);
+ return done;
+}
+
+static int mon_bin_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ struct mon_reader_bin *rp = file->private_data;
+ // struct mon_bus* mbus = rp->r.m_bus;
+ int ret = 0;
+ struct mon_bin_hdr *ep;
+ unsigned long flags;
+
+ switch (cmd) {
+
+ case MON_IOCQ_URB_LEN:
+ /*
+ * N.B. This only returns the size of data, without the header.
+ */
+ spin_lock_irqsave(&rp->b_lock, flags);
+ if (!MON_RING_EMPTY(rp)) {
+ ep = MON_OFF2HDR(rp, rp->b_out);
+ ret = ep->len_cap;
+ }
+ spin_unlock_irqrestore(&rp->b_lock, flags);
+ break;
+
+ case MON_IOCQ_RING_SIZE:
+ ret = rp->b_size;
+ break;
+
+#if 0
++ case MON_IOCT_RING_SIZE:
++ spin_lock_irqsave(&mbus->lock, flags);
++ ret = mon_bin_create_ring(&ring, arg);
++ if (!ret) {
++ mon_bin_destroy_ring(&rp->ring);
++ rp->ring = ring;
++ }
++ spin_unlock_irqrestore(&mbus->lock, flags);
++ break;
+#endif
+
+ case MON_IOCX_URB:
+ {
+ /*
+ * This is the original ABI which Paolo's libpcap uses.
+ * Don't use this. Use MON_IOCX_GET instead.
+ * N.B. This ioctl is misnamed: it does not retrieve URBs,
+ * it retrieves events (2 events per one URB).
+ */
+ struct mon_bin_urb_info info;
+
+ if (copy_from_user(&info, (struct mon_bin_urb_info __user *)arg,
+ sizeof(struct mon_bin_urb_info)))
+ return -EFAULT;
+
+ ret = mon_bin_get_event(file, rp,
+ (struct mon_bin_hdr __user *)arg, info.data,
+ info.hdr.len_cap);
+ }
+ break;
+
+ case MON_IOCX_GET:
+ {
+ struct mon_bin_get getb;
+
+ if (copy_from_user(&getb, (void __user *)arg,
+ sizeof(struct mon_bin_get)))
+ return -EFAULT;
+
+ if (getb.alloc > 0x10000000) /* Want to cast to u32 */
+ return -EINVAL;
+ ret = mon_bin_get_event(file, rp,
+ getb.hdr, getb.data, (unsigned int)getb.alloc);
+ }
+ break;
+
+#ifdef CONFIG_COMPAT
+ case MON_IOCX_GET32: {
+ struct mon_bin_get32 getb;
+
+ if (copy_from_user(&getb, (void __user *)arg,
+ sizeof(struct mon_bin_get32)))
+ return -EFAULT;
+
+ ret = mon_bin_get_event(file, rp,
+ compat_ptr(getb.hdr32), compat_ptr(getb.data32),
+ getb.alloc32);
+ }
+ break;
+#endif
+
+ case MON_IOCG_STATS: {
+ struct mon_bin_stats __user *sp;
+ sp = (struct mon_bin_stats __user *)arg;
+ if (put_user(rp->cnt_lost, &sp->dropped))
+ return -EFAULT;
+ if (put_user(rp->nevents, &sp->queued))
+ return -EFAULT;
+ }
+ break;
+
+ default:
+ return -ENOTTY;
+ }
+
+ return ret;
+}
+
+static unsigned int
+mon_bin_poll(struct file *file, struct poll_table_struct *wait)
+{
+ struct mon_reader_bin *rp = file->private_data;
+ unsigned int mask = 0;
+ unsigned long flags;
+
+ if (file->f_mode & FMODE_READ)
+ poll_wait(file, &rp->b_wait, wait);
+
+ spin_lock_irqsave(&rp->b_lock, flags);
+ if (!MON_RING_EMPTY(rp))
+ mask |= POLLIN | POLLRDNORM; /* readable */
+ spin_unlock_irqrestore(&rp->b_lock, flags);
+ return mask;
+}
+
+#if 0
++
++/*
++ * open and close: just keep track of how many times the device is
++ * mapped, to avoid releasing it.
++ */
++
++static void mon_bin_vma_open(struct vm_area_struct *vma)
++{
++ struct mon_reader_bin *rp = vma->vm_private_data;
++
++ rp->vmas++;
++}
++
++static void mon_bin_vma_close(struct vm_area_struct *vma)
++{
++ struct mon_reader_bin *rp = vma->vm_private_data;
++
++ rp->vmas--;
++}
++
++/*
++ * map ring pages to user space
++ */
++struct page *mon_bin_vma_nopage(struct vm_area_struct *vma,
++ unsigned long address, int *type)
++{
++ unsigned long offset, chunk_idx, chunk_offset;
++ struct mon_reader_bin *rp = vma->vm_private_data;
++ struct page *pageptr = NOPAGE_SIGBUS;
++
++ offset = (address - vma->vm_start) + (vma->vm_pgoff << PAGE_SHIFT);
++ if (offset < PAGE_SIZE) {
++ pageptr = virt_to_page(rp->ring.rd);
++ goto found;
++ }
++ chunk_idx = (offset - PAGE_SIZE) >> MON_CHUNK_SHIFT;
++ if (chunk_idx > rp->ring.chunk_num)
++ goto out;
++
++ chunk_offset = ((offset - PAGE_SIZE) & MON_CHUNK_MASK) & (~PAGE_MASK);
++ pageptr = virt_to_page(rp->ring.chunk_vec[chunk_idx] + chunk_offset);
++found:
++ get_page(pageptr);
++ if (type)
++ *type = VM_FAULT_MINOR;
++out:
++ return pageptr;
++}
++
++struct vm_operations_struct mon_bin_vm_ops = {
++ .open = mon_bin_vma_open,
++ .close = mon_bin_vma_close,
++ .nopage = mon_bin_vma_nopage,
++};
++
++int mon_bin_mmap(struct file *filp, struct vm_area_struct *vma)
++{
++ /* don't do anything here: "nopage" will set up page table entries */
++ vma->vm_ops = &mon_bin_vm_ops;
++ vma->vm_flags |= VM_RESERVED;
++ vma->vm_private_data = filp->private_data;
++ mon_bin_vma_open(vma);
++ return 0;
++
++}
+#endif
+
+struct file_operations mon_fops_binary = {
+ .owner = THIS_MODULE,
+ .open = mon_bin_open,
+ .llseek = no_llseek,
+ .read = mon_bin_read,
+ /* .write = mon_text_write, */
+ .poll = mon_bin_poll,
+ .ioctl = mon_bin_ioctl,
+ .release = mon_bin_release,
+};
+
+static int mon_alloc_buff(struct mon_pgmap *map, int npages)
+{
+ int n;
+ unsigned long vaddr;
+
+ for (n = 0; n < npages; n++) {
+ vaddr = get_zeroed_page(GFP_KERNEL);
+ if (vaddr == 0) {
+ while (n-- != 0)
+ free_page((unsigned long) map[n].ptr);
+ return -ENOMEM;
+ }
+ map[n].ptr = (unsigned char *) vaddr;
+ map[n].pg = virt_to_page(vaddr);
+ }
+ return 0;
+}
+
+static void mon_free_buff(struct mon_pgmap *map, int npages)
+{
+ int n;
+
+ for (n = 0; n < npages; n++)
+ free_page((unsigned long) map[n].ptr);
+}
+
+int __init mon_bin_init(void)
+{
+ int rc;
+
+ rc = alloc_chrdev_region(&mon_bin_dev0, 0, MON_BIN_MAX_MINOR, "usbmon");
+ if (rc < 0)
+ goto err_dev;
+
+ cdev_init(&mon_bin_cdev, &mon_fops_binary);
+ mon_bin_cdev.owner = THIS_MODULE;
+
+ rc = cdev_add(&mon_bin_cdev, mon_bin_dev0, MON_BIN_MAX_MINOR);
+ if (rc < 0)
+ goto err_add;
+
+ return 0;
+
+err_add:
+ unregister_chrdev_region(mon_bin_dev0, MON_BIN_MAX_MINOR);
+err_dev:
+ return rc;
+}
+
+void __exit mon_bin_exit(void)
+{
+ cdev_del(&mon_bin_cdev);
+ unregister_chrdev_region(mon_bin_dev0, MON_BIN_MAX_MINOR);
+}
diff -uprN -X dontdiff linux-2.6.18/drivers/usb/mon/mon_dma.c
linux-2.6.18-ub/drivers/usb/mon/mon_dma.c
--- linux-2.6.18/drivers/usb/mon/mon_dma.c 2006-09-29 21:27:14.000000000 -0700
+++ linux-2.6.18-ub/drivers/usb/mon/mon_dma.c 2006-11-17 00:17:36.000000000 -0800
@@ -48,6 +48,36 @@ char mon_dmapeek(unsigned char *dst, dma
local_irq_restore(flags);
return 0;
}
+
+void mon_dmapeek_vec(const struct mon_reader_bin *rp,
+ unsigned int offset, dma_addr_t dma_addr, unsigned int length)
+{
+ unsigned long flags;
+ unsigned int step_len;
+ struct page *pg;
+ unsigned char *map;
+ unsigned long page_off, page_len;
+
+ local_irq_save(flags);
+ while (length) {
+ /* compute number of bytes we are going to copy in this page */
+ step_len = length;
+ page_off = dma_addr & (PAGE_SIZE-1);
+ page_len = PAGE_SIZE - page_off;
+ if (page_len < step_len)
+ step_len = page_len;
+
+ /* copy data and advance pointers */
+ pg = phys_to_page(dma_addr);
+ map = kmap_atomic(pg, KM_IRQ0);
+ offset = mon_copy_to_buff(rp, offset, map + page_off, step_len);
+ kunmap_atomic(map, KM_IRQ0);
+ dma_addr += step_len;
+ length -= step_len;
+ }
+ local_irq_restore(flags);
+}
+
#endif /* __i386__ */
#ifndef MON_HAS_UNMAP
@@ -55,4 +85,11 @@ char mon_dmapeek(unsigned char *dst, dma
{
return 'D';
}
-#endif
+
+void mon_dmapeek_vec(const struct mon_reader_bin *rp,
+ unsigned int offset, dma_addr_t dma_addr, unsigned int length)
+{
+ ;
+}
+
+#endif /* MON_HAS_UNMAP */
diff -uprN -X dontdiff linux-2.6.18/drivers/usb/mon/mon_main.c
linux-2.6.18-ub/drivers/usb/mon/mon_main.c
--- linux-2.6.18/drivers/usb/mon/mon_main.c 2006-09-29 21:27:14.000000000 -0700
+++ linux-2.6.18-ub/drivers/usb/mon/mon_main.c 2006-11-21 21:40:48.000000000 -0800
@@ -9,7 +9,6 @@
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/usb.h>
-#include <linux/debugfs.h>
#include <linux/smp_lock.h>
#include <linux/notifier.h>
#include <linux/mutex.h>
@@ -22,11 +21,10 @@ static void mon_complete(struct usb_bus
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);
-static void mon_bus_init(struct dentry *mondir, struct usb_bus *ubus);
+static void mon_bus_init(struct usb_bus *ubus);
DEFINE_MUTEX(mon_lock);
-static struct dentry *mon_dir; /* /dbg/usbmon */
static LIST_HEAD(mon_buses); /* All buses we know: struct mon_bus */
/*
@@ -200,7 +198,7 @@ static void mon_stop(struct mon_bus *mbu
*/
static void mon_bus_add(struct usb_bus *ubus)
{
- mon_bus_init(mon_dir, ubus);
+ mon_bus_init(ubus);
}
/*
@@ -212,8 +210,8 @@ static void mon_bus_remove(struct usb_bu
mutex_lock(&mon_lock);
list_del(&mbus->bus_link);
- debugfs_remove(mbus->dent_t);
- debugfs_remove(mbus->dent_s);
+ if (mbus->text_inited)
+ mon_text_del(mbus);
mon_dissolve(mbus, ubus);
kref_put(&mbus->ref, mon_bus_drop);
@@ -282,13 +280,9 @@ static void mon_bus_drop(struct kref *r)
* - refcount USB bus struct
* - link
*/
-static void mon_bus_init(struct dentry *mondir, struct usb_bus *ubus)
+static void mon_bus_init(struct usb_bus *ubus)
{
- struct dentry *d;
struct mon_bus *mbus;
- enum { NAMESZ = 10 };
- char name[NAMESZ];
- int rc;
if ((mbus = kzalloc(sizeof(struct mon_bus), GFP_KERNEL)) == NULL)
goto err_alloc;
@@ -304,57 +298,54 @@ static void mon_bus_init(struct dentry *
mbus->u_bus = ubus;
ubus->mon_bus = mbus;
- rc = snprintf(name, NAMESZ, "%dt", ubus->busnum);
- if (rc <= 0 || rc >= NAMESZ)
- goto err_print_t;
- d = debugfs_create_file(name, 0600, mondir, mbus, &mon_fops_text);
- if (d == NULL)
- goto err_create_t;
- mbus->dent_t = d;
-
- rc = snprintf(name, NAMESZ, "%ds", ubus->busnum);
- if (rc <= 0 || rc >= NAMESZ)
- goto err_print_s;
- d = debugfs_create_file(name, 0600, mondir, mbus, &mon_fops_stat);
- if (d == NULL)
- goto err_create_s;
- mbus->dent_s = d;
+ mbus->text_inited = mon_text_add(mbus, ubus);
+ // mon_bin_add(...)
mutex_lock(&mon_lock);
list_add_tail(&mbus->bus_link, &mon_buses);
mutex_unlock(&mon_lock);
return;
-err_create_s:
-err_print_s:
- debugfs_remove(mbus->dent_t);
-err_create_t:
-err_print_t:
- kfree(mbus);
err_alloc:
return;
}
+/*
+ * 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;
+
+ 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;
+}
+
static int __init mon_init(void)
{
struct usb_bus *ubus;
- struct dentry *mondir;
+ int rc;
- mondir = debugfs_create_dir("usbmon", NULL);
- if (IS_ERR(mondir)) {
- printk(KERN_NOTICE TAG ": debugfs is not available\n");
- return -ENODEV;
- }
- if (mondir == NULL) {
- printk(KERN_NOTICE TAG ": unable to create usbmon directory\n");
- return -ENODEV;
- }
- mon_dir = mondir;
+ if ((rc = mon_text_init()) != 0)
+ goto err_text;
+ if ((rc = mon_bin_init()) != 0)
+ goto err_bin;
if (usb_mon_register(&mon_ops_0) != 0) {
printk(KERN_NOTICE TAG ": unable to register with the core\n");
- debugfs_remove(mondir);
- return -ENODEV;
+ rc = -ENODEV;
+ goto err_reg;
}
// MOD_INC_USE_COUNT(which_module?);
@@ -362,10 +353,17 @@ static int __init mon_init(void)
mutex_lock(&usb_bus_list_lock);
list_for_each_entry (ubus, &usb_bus_list, bus_list) {
- mon_bus_init(mondir, ubus);
+ mon_bus_init(ubus);
}
mutex_unlock(&usb_bus_list_lock);
return 0;
+
+err_reg:
+ mon_bin_exit();
+err_bin:
+ mon_text_exit();
+err_text:
+ return rc;
}
static void __exit mon_exit(void)
@@ -382,8 +380,8 @@ static void __exit mon_exit(void)
mbus = list_entry(p, struct mon_bus, bus_link);
list_del(p);
- debugfs_remove(mbus->dent_t);
- debugfs_remove(mbus->dent_s);
+ if (mbus->text_inited)
+ mon_text_del(mbus);
/*
* This never happens, because the open/close paths in
@@ -402,7 +400,8 @@ static void __exit mon_exit(void)
}
mutex_unlock(&mon_lock);
- debugfs_remove(mon_dir);
+ mon_text_exit();
+ mon_bin_exit();
}
module_init(mon_init);
diff -uprN -X dontdiff linux-2.6.18/drivers/usb/mon/mon_text.c
linux-2.6.18-ub/drivers/usb/mon/mon_text.c
--- linux-2.6.18/drivers/usb/mon/mon_text.c 2006-09-29 21:27:14.000000000 -0700
+++ linux-2.6.18-ub/drivers/usb/mon/mon_text.c 2006-11-10 20:44:37.000000000 -0800
@@ -9,6 +9,7 @@
#include <linux/usb.h>
#include <linux/time.h>
#include <linux/mutex.h>
+#include <linux/debugfs.h>
#include <asm/uaccess.h>
#include "usb_mon.h"
@@ -63,6 +64,8 @@ struct mon_reader_text {
char slab_name[SLAB_NAME_SZ];
};
+static struct dentry *mon_dir; /* Usually /sys/kernel/debug/usbmon */
+
static void mon_text_ctor(void *, kmem_cache_t *, unsigned long);
/*
@@ -446,6 +449,47 @@ struct file_operations mon_fops_text = {
.release = mon_text_release,
};
+int mon_text_add(struct mon_bus *mbus, const struct usb_bus *ubus)
+{
+ struct dentry *d;
+ enum { NAMESZ = 10 };
+ char name[NAMESZ];
+ int rc;
+
+ rc = snprintf(name, NAMESZ, "%dt", ubus->busnum);
+ if (rc <= 0 || rc >= NAMESZ)
+ goto err_print_t;
+ d = debugfs_create_file(name, 0600, mon_dir, mbus, &mon_fops_text);
+ if (d == NULL)
+ goto err_create_t;
+ mbus->dent_t = d;
+
+ /* XXX The stats do not belong to here (text API), but oh well... */
+ rc = snprintf(name, NAMESZ, "%ds", ubus->busnum);
+ 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:
+ debugfs_remove(mbus->dent_t);
+ mbus->dent_t = NULL;
+err_create_t:
+err_print_t:
+ return 0;
+}
+
+void mon_text_del(struct mon_bus *mbus)
+{
+ debugfs_remove(mbus->dent_t);
+ debugfs_remove(mbus->dent_s);
+}
+
/*
* Slab interface: constructor.
*/
@@ -458,3 +502,24 @@ static void mon_text_ctor(void *mem, kme
memset(mem, 0xe5, sizeof(struct mon_event_text));
}
+int __init mon_text_init(void)
+{
+ struct dentry *mondir;
+
+ mondir = debugfs_create_dir("usbmon", NULL);
+ if (IS_ERR(mondir)) {
+ printk(KERN_NOTICE TAG ": debugfs is not available\n");
+ return -ENODEV;
+ }
+ if (mondir == NULL) {
+ printk(KERN_NOTICE TAG ": unable to create usbmon directory\n");
+ return -ENODEV;
+ }
+ mon_dir = mondir;
+ return 0;
+}
+
+void __exit mon_text_exit(void)
+{
+ debugfs_remove(mon_dir);
+}
diff -uprN -X dontdiff linux-2.6.18/drivers/usb/mon/usb_mon.h
linux-2.6.18-ub/drivers/usb/mon/usb_mon.h
--- linux-2.6.18/drivers/usb/mon/usb_mon.h 2006-09-29 21:27:14.000000000 -0700
+++ linux-2.6.18-ub/drivers/usb/mon/usb_mon.h 2006-11-14 17:18:13.000000000 -0800
@@ -17,9 +17,11 @@
struct mon_bus {
struct list_head bus_link;
spinlock_t lock;
+ struct usb_bus *u_bus;
+
+ int text_inited;
struct dentry *dent_s; /* Debugging file */
struct dentry *dent_t; /* Text interface file */
- struct usb_bus *u_bus;
/* Ref */
int nreaders; /* Under mon_lock AND mbus->lock */
@@ -47,13 +49,33 @@ struct mon_reader {
void mon_reader_add(struct mon_bus *mbus, struct mon_reader *r);
void mon_reader_del(struct mon_bus *mbus, struct mon_reader *r);
+struct mon_bus *mon_bus_lookup(unsigned int num);
+
+int /*bool*/ mon_text_add(struct mon_bus *mbus, const struct usb_bus *ubus);
+void mon_text_del(struct mon_bus *mbus);
+// void mon_bin_add(struct mon_bus *);
+
+int __init mon_text_init(void);
+void __exit mon_text_exit(void);
+
/*
+ * DMA interface.
+ *
+ * XXX The vectored side needs a serious re-thinking. Abstracting vectors,
+ * like in Paolo's original patch, produces a double pkmap. We need an idea.
*/
extern char mon_dmapeek(unsigned char *dst, dma_addr_t dma_addr, int len);
+struct mon_reader_bin;
+extern void mon_dmapeek_vec(const struct mon_reader_bin *rp,
+ unsigned int offset, dma_addr_t dma_addr, unsigned int len);
+extern unsigned int mon_copy_to_buff(const struct mon_reader_bin *rp,
+ unsigned int offset, const unsigned char *from, unsigned int len);
+
+/*
+ */
extern struct mutex mon_lock;
-extern struct file_operations mon_fops_text;
extern struct file_operations mon_fops_stat;
#endif /* __USB_MON_H */
-------------------------------------------------------------------------
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