#include <linux/usb.h>
#include <linux/time.h>
#include <linux/mutex.h>
+#include <linux/debugfs.h>
#include <asm/uaccess.h>
#include "usb_mon.h"
#define SLAB_NAME_SZ 30
struct mon_reader_text {
- kmem_cache_t *e_slab;
+ struct kmem_cache *e_slab;
int nevents;
struct list_head e_list;
struct mon_reader r; /* In C, parent class can be placed anywhere */
char slab_name[SLAB_NAME_SZ];
};
-static void mon_text_ctor(void *, kmem_cache_t *, unsigned long);
+static struct dentry *mon_dir; /* Usually /sys/kernel/debug/usbmon */
+
+static void mon_text_ctor(void *, struct kmem_cache *, unsigned long);
/*
* mon_text_submit
*/
static inline char mon_text_get_setup(struct mon_event_text *ep,
- struct urb *urb, char ev_type)
+ struct urb *urb, char ev_type, struct mon_bus *mbus)
{
if (!usb_pipecontrol(urb->pipe) || ev_type != 'S')
return '-';
- if (urb->transfer_flags & URB_NO_SETUP_DMA_MAP)
+ if (mbus->uses_dma && (urb->transfer_flags & URB_NO_SETUP_DMA_MAP))
return mon_dmapeek(ep->setup, urb->setup_dma, SETUP_MAX);
if (urb->setup_packet == NULL)
return 'Z'; /* '0' would be not as pretty. */
}
static inline char mon_text_get_data(struct mon_event_text *ep, struct urb *urb,
- int len, char ev_type)
+ int len, char ev_type, struct mon_bus *mbus)
{
int pipe = urb->pipe;
* contain non-NULL garbage in case the upper level promised to
* set DMA for the HCD.
*/
- if (urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP)
+ if (mbus->uses_dma && (urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP))
return mon_dmapeek(ep->data, urb->transfer_dma, len);
if (urb->transfer_buffer == NULL)
stamp = mon_get_timestamp();
if (rp->nevents >= EVENT_MAX ||
- (ep = kmem_cache_alloc(rp->e_slab, SLAB_ATOMIC)) == NULL) {
+ (ep = kmem_cache_alloc(rp->e_slab, GFP_ATOMIC)) == NULL) {
rp->r.m_bus->cnt_text_lost++;
return;
}
/* Collecting status makes debugging sense for submits, too */
ep->status = urb->status;
- ep->setup_flag = mon_text_get_setup(ep, urb, ev_type);
- ep->data_flag = mon_text_get_data(ep, urb, ep->length, ev_type);
+ 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);
rp->nevents++;
list_add_tail(&ep->e_link, &rp->e_list);
struct mon_event_text *ep;
if (rp->nevents >= EVENT_MAX ||
- (ep = kmem_cache_alloc(rp->e_slab, SLAB_ATOMIC)) == NULL) {
+ (ep = kmem_cache_alloc(rp->e_slab, GFP_ATOMIC)) == NULL) {
rp->r.m_bus->cnt_text_lost++;
return;
}
int rc;
mutex_lock(&mon_lock);
- mbus = inode->u.generic_ip;
+ mbus = inode->i_private;
ubus = mbus->u_bus;
rp = kzalloc(sizeof(struct mon_reader_text), GFP_KERNEL);
struct mon_event_text *ep;
mutex_lock(&mon_lock);
- mbus = inode->u.generic_ip;
+ mbus = inode->i_private;
if (mbus->nreaders <= 0) {
printk(KERN_ERR TAG ": consistency error on close\n");
return 0;
}
-struct file_operations mon_fops_text = {
+static const struct file_operations mon_fops_text = {
.owner = THIS_MODULE,
.open = mon_text_open,
.llseek = no_llseek,
.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.
*/
-static void mon_text_ctor(void *mem, kmem_cache_t *slab, unsigned long sflags)
+static void mon_text_ctor(void *mem, struct kmem_cache *slab, unsigned long sflags)
{
/*
* Nothing to initialize. No, really!
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);
+}