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usbmon: Add class for binary interface

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Add a class which allows for an easier integration with udev.

This code was originally written by Paolo Abeni, and arrived to my tree
as a part of big patch to add binary API on December 18. As I understand,
Paolo always meant the class to be a part of the whole thing. This is his
udev rule to go along with the patch:

KERNEL=="usbmon[0-9]*", NAME="usbmon%n", MODE="0440",OWNER="root",GROUP="bin"

Signed-off-by: Pete Zaitcev <zaitcev@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Pete Zaitcev
2007-05-03 16:51:16 -07:00
committed by Greg Kroah-Hartman
parent 49cdee0ed0
commit ce7cd137fc
4 changed files with 66 additions and 18 deletions
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29
drivers/usb/mon/mon_text.c
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@@ -655,20 +655,24 @@ static const struct file_operations mon_fops_text_u = {
.release = mon_text_release,
};
int mon_text_add(struct mon_bus *mbus, int busnum)
int mon_text_add(struct mon_bus *mbus, const struct usb_bus *ubus)
{
struct dentry *d;
enum { NAMESZ = 10 };
char name[NAMESZ];
int busnum = ubus? ubus->busnum: 0;
int rc;
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;
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;
}
rc = snprintf(name, NAMESZ, "%du", busnum);
if (rc <= 0 || rc >= NAMESZ)
@@ -694,8 +698,10 @@ err_print_s:
mbus->dent_u = NULL;
err_create_u:
err_print_u:
debugfs_remove(mbus->dent_t);
mbus->dent_t = NULL;
if (ubus != NULL) {
debugfs_remove(mbus->dent_t);
mbus->dent_t = NULL;
}
err_create_t:
err_print_t:
return 0;
@@ -704,7 +710,8 @@ err_print_t:
void mon_text_del(struct mon_bus *mbus)
{
debugfs_remove(mbus->dent_u);
debugfs_remove(mbus->dent_t);
if (mbus->dent_t != NULL)
debugfs_remove(mbus->dent_t);
debugfs_remove(mbus->dent_s);
}