Re: [Xen-devel] [PATCH] xl, fix for short BDF (without domain specified)

[Sergey Tovpeko <tsv.devel@xxxxxxxxx>]

Oh, too many input cases.

Below patch tries to recognize the following input:
pci = ['0001:02:03.4@5']
pci = ['0001:02:03.4']
pci = ['02:03.4@5']
pci = ['02:03.4']

Hope so.

Stefano Stabellini wrote:
> the test on the return value should be "< 5", otherwise it wouldn't work
> if you use
>
> pci = ['01:00.0@0']
>
>   

commit db423431f8b8b2a773df105e407372118cc12a27
Author: Sergey Tovpeko <tovpeko@xxxxxxxxx>
Date:   Tue Jul 6 23:31:50 2010 +0400

    Check that BDF have been parsed correctly.
    
    Before that fix, BDF could be parsed incorrectly if user omitted domain in 
it.

diff --git a/tools/libxl/xl_cmdimpl.c b/tools/libxl/xl_cmdimpl.c
index 208ecd6..fe2408c 100644
--- a/tools/libxl/xl_cmdimpl.c
+++ b/tools/libxl/xl_cmdimpl.c
@@ -827,9 +827,12 @@ skip_vfb:
             p = strtok(buf2, ",");
             if (!p)
                 goto skip_pci;
-            if (!sscanf(p, PCI_BDF_VDEVFN, &domain, &bus, &dev, &func, 
&vdevfn)) {
-                sscanf(p, "%02x:%02x.%01x@%02x", &bus, &dev, &func, &vdevfn);
+            if (sscanf(p, PCI_BDF_VDEVFN, &domain, &bus, &dev, &func, &vdevfn) 
< 4) {
                 domain = 0;
+                if (sscanf(p, "%02x:%02x.%01x@%02x", &bus, &dev, &func, 
&vdevfn) < 3) {
+                    fprintf(stderr,"xl: Unable to parse pci bdf (%s)\n", p);
+                    goto skip_pci;
+                }
             }
             libxl_device_pci_init(*pcidevs + *num_pcidevs, domain, bus, dev, 
func, vdevfn);
             (*pcidevs)[*num_pcidevs].msitranslate = pci_msitranslate;

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