On Mon, Mar 28, 2005 at 12:19:36AM +0400, Roman Kagan wrote:
> On Fri, Mar 25, 2005 at 09:40:48AM -0800, Greg KH wrote:
> > On Fri, Mar 25, 2005 at 10:43:01AM +0300, Roman Kagan wrote:
> > > > > The patch expects a matching change in scripts/mod/file2alias.c I sent
> > > > > to linux-hotplug-devel list a few days ago (i.e. puts
> > > > > bcdDevice in MODNAME as dXXXX, rather that dlXXXXdhXXXX).
> > > >
> > > > I changed this back, as this change doesn't seem to have gone anywhere.
> > >
> > > It was sent to linux-hotplug-devel and cc to you on Feb. 26, as I
> > > thought it was up to you to include it. Has it got lost and should I
> > > resend it, or should I better send it to another list? I think it's
> > > worth merging as the current scheme bites everybody with nontrivial
> > > bcdDevice range.
> >
> > Ok, care to resend it? I saw a lot of different patches floating
> > around, and didn't know which one was the decided apon best fix.
>
> Sure, here you are. This is the latest version of the patch I sent on
> Feb 26. Erik van Konijnenburg reviewed it and was OK with it
> (Erik mind adding your Signed-off-by?), so it's "decided upon best" by
> the two of us :)
Sure. Not too sure about typographic conventions for signing off,
but anyway:
Signed-off-by: Erik van Konijnenburg <[EMAIL PROTECTED]>
>
> Roman.
>
> =================================
>
> The attached patch fixes the longstanding problem with USB bcdDevice
> numeric ranges incorrectly converted into patterns for MODULE_ALIAS
> generation. Previously it put both the lower and the upper limits into
> the pattern, dlXdhY, making it impossible to fnmatch against except for
> a few special cases, like dl*dh* or dlXdhX.
>
> The patch makes it generate multiple MODULE_ALIAS lines covering the
> whole range with fnmatch-able patterns. E.g. for a range between 0x0001
> and 0xa345 it gives the following patterns:
>
> 000[123456789ABCDEF]*
> 00[123456789ABCDEF]*
> 0[123456789ABCDEF]*
> [123456789]*
> A[012]*
> A3[0123]*
> A34[012345]*
>
> Since bcdDevice is 2 bytes wide = 4 digits in hex representation, the
> max no. of patters is 2 * 4 - 1 = 7.
>
> Explicit lists of allowed characters inside brackets are used to avoid
> dependencies on locale collation order with patterns using a dash, like
> [3-B].
>
> The patch uses "d" prefix for bcdDevice; the most common (and almost the
> only working) case of dl*dh* becomes d* and thus continues to work.
>
> Please consider applying.
> Roman.
>
> Signed-off-by: Roman Kagan <[EMAIL PROTECTED]>
>
> scripts/mod/file2alias.c | 112
> +++++++++++++++++++++++++++++++++++++----------
> 1 files changed, 89 insertions(+), 23 deletions(-)
>
> --- linux-2.6.11-rc4/scripts/mod/file2alias.c.orig 2005-02-13
> 06:06:23.000000000 +0300
> +++ linux-2.6.11-rc4/scripts/mod/file2alias.c 2005-02-26 19:15:49.769160544
> +0300
> @@ -47,32 +47,34 @@ do {
> sprintf(str + strlen(str), "*"); \
> } while(0)
>
> -/* Looks like "usb:vNpNdlNdhNdcNdscNdpNicNiscNipN" */
> -static int do_usb_entry(const char *filename,
> - struct usb_device_id *id, char *alias)
> +/* USB is special because the bcdDevice can be matched against a numeric
> range */
> +/* Looks like "usb:vNpNdNdcNdscNdpNicNiscNipN" */
> +static void do_usb_entry(struct usb_device_id *id,
> + unsigned int bcdDevice_initial, int
> bcdDevice_initial_digits,
> + unsigned char range_lo, unsigned char range_hi,
> + struct module *mod)
> {
> - id->match_flags = TO_NATIVE(id->match_flags);
> - id->idVendor = TO_NATIVE(id->idVendor);
> - id->idProduct = TO_NATIVE(id->idProduct);
> - id->bcdDevice_lo = TO_NATIVE(id->bcdDevice_lo);
> - id->bcdDevice_hi = TO_NATIVE(id->bcdDevice_hi);
> -
> - /*
> - * Some modules (visor) have empty slots as placeholder for
> - * run-time specification that results in catch-all alias
> - */
> - if (!(id->idVendor | id->bDeviceClass | id->bInterfaceClass))
> - return 1;
> -
> + static const char hexdigits[] = "0123456789ABCDEF";
> + char alias[500];
> strcpy(alias, "usb:");
> ADD(alias, "v", id->match_flags&USB_DEVICE_ID_MATCH_VENDOR,
> id->idVendor);
> ADD(alias, "p", id->match_flags&USB_DEVICE_ID_MATCH_PRODUCT,
> id->idProduct);
> - ADD(alias, "dl", id->match_flags&USB_DEVICE_ID_MATCH_DEV_LO,
> - id->bcdDevice_lo);
> - ADD(alias, "dh", id->match_flags&USB_DEVICE_ID_MATCH_DEV_HI,
> - id->bcdDevice_hi);
> +
> + strcat(alias, "d");
> + if (bcdDevice_initial_digits)
> + sprintf(alias + strlen(alias), "%0*X",
> + bcdDevice_initial_digits, bcdDevice_initial);
> + if (range_lo == range_hi)
> + strncat(alias, hexdigits + range_lo, 1);
> + else if (range_lo > 0x0 || range_hi < 0xf) {
> + strcat(alias, "[");
> + strncat(alias, hexdigits + range_lo, range_hi - range_lo + 1);
> + strcat(alias, "]");
> + }
> + strcat(alias, "*");
> +
> ADD(alias, "dc", id->match_flags&USB_DEVICE_ID_MATCH_DEV_CLASS,
> id->bDeviceClass);
> ADD(alias, "dsc",
> @@ -90,7 +92,71 @@ static int do_usb_entry(const char *file
> ADD(alias, "ip",
> id->match_flags&USB_DEVICE_ID_MATCH_INT_PROTOCOL,
> id->bInterfaceProtocol);
> - return 1;
> +
> + /* Always end in a wildcard, for future extension */
> + if (alias[strlen(alias)-1] != '*')
> + strcat(alias, "*");
> + buf_printf(&mod->dev_table_buf,
> + "MODULE_ALIAS(\"%s\");\n", alias);
> +}
> +
> +static void do_usb_entry_multi(struct usb_device_id *id, struct module *mod)
> +{
> + unsigned int devlo, devhi;
> + unsigned char chi, clo;
> + int ndigits;
> +
> + id->match_flags = TO_NATIVE(id->match_flags);
> + id->idVendor = TO_NATIVE(id->idVendor);
> + id->idProduct = TO_NATIVE(id->idProduct);
> +
> + devlo = id->match_flags & USB_DEVICE_ID_MATCH_DEV_LO ?
> + TO_NATIVE(id->bcdDevice_lo) : 0x0U;
> + devhi = id->match_flags & USB_DEVICE_ID_MATCH_DEV_HI ?
> + TO_NATIVE(id->bcdDevice_hi) : ~0x0U;
> +
> + /*
> + * Some modules (visor) have empty slots as placeholder for
> + * run-time specification that results in catch-all alias
> + */
> + if (!(id->idVendor | id->bDeviceClass | id->bInterfaceClass))
> + return;
> +
> + /* Convert numeric bcdDevice range into fnmatch-able pattern(s) */
> + for (ndigits = sizeof(id->bcdDevice_lo) * 2 - 1; devlo <= devhi;
> ndigits--) {
> + clo = devlo & 0xf;
> + chi = devhi & 0xf;
> + devlo >>= 4;
> + devhi >>= 4;
> +
> + if (devlo == devhi || !ndigits) {
> + do_usb_entry(id, devlo, ndigits, clo, chi, mod);
> + break;
> + }
> +
> + if (clo != 0x0)
> + do_usb_entry(id, devlo++, ndigits, clo, 0xf, mod);
> +
> + if (chi != 0xf)
> + do_usb_entry(id, devhi--, ndigits, 0x0, chi, mod);
> + }
> +}
> +
> +static void do_usb_table(void *symval, unsigned long size,
> + struct module *mod)
> +{
> + unsigned int i;
> + const unsigned long id_size = sizeof(struct usb_device_id);
> +
> + if (size % id_size || size < id_size) {
> + fprintf(stderr, "*** Warning: %s ids %lu bad size "
> + "(each on %lu)\n", mod->name, size, id_size);
> + }
> + /* Leave last one: it's the terminator. */
> + size -= id_size;
> +
> + for (i = 0; i < size; i += id_size)
> + do_usb_entry_multi(symval + i, mod);
> }
>
> /* Looks like: ieee1394:venNmoNspNverN */
> @@ -262,8 +328,8 @@ void handle_moddevtable(struct module *m
> do_table(symval, sym->st_size, sizeof(struct pci_device_id),
> do_pci_entry, mod);
> else if (sym_is(symname, "__mod_usb_device_table"))
> - do_table(symval, sym->st_size, sizeof(struct usb_device_id),
> - do_usb_entry, mod);
> + /* special case to handle bcdDevice ranges */
> + do_usb_table(symval, sym->st_size, mod);
> else if (sym_is(symname, "__mod_ieee1394_device_table"))
> do_table(symval, sym->st_size, sizeof(struct
> ieee1394_device_id),
> do_ieee1394_entry, mod);
>
>
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