Re: [Xen-devel] Help on domain creation

[Ning Wu <ningwu@xxxxxxxxxxxxxx>]

I did run it as root on domain0. The program calls ioctl(,SNDCTL...) and
denied access. ??????  What does it do with sound device? The error
returned for xi_phys_grant is "invalid argument".

Any ideas?

Here is a more complete log:
[root@oscan18 root]# id
uid=0(root) gid=0(root)
groups=0(root),1(bin),2(daemon),3(sys),4(adm),6(disk),10(wheel)
[root@oscan18 root]# xi_create 98304 XenoLinux
ERROR: Error when executing privileged control ioctl (1 = Operation not
permitted)
[root@oscan18 root]# strace xi_create 98304 XenoLinux
execve("/usr/local/bin/xi_create", ["xi_create", "98304", "XenoLinux"],
[/* 35 vars */]) = 0
uname({sys="Linux", node="oscan18", ...}) = 0
brk(0)                                  = 0x8049b7c
open("/etc/ld.so.preload", O_RDONLY)    = -1 ENOENT (No such file or
directory)
open("/etc/ld.so.cache", O_RDONLY)      = 3
fstat64(3, {st_mode=S_IFREG|0644, st_size=13466, ...}) = 0
old_mmap(NULL, 13466, PROT_READ, MAP_PRIVATE, 3, 0) = 0x40014000
close(3)                                = 0
open("/lib/i686/libc.so.6", O_RDONLY)   = 3
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0`u\1B4\0"...,
1024) = 1024
fstat64(3, {st_mode=S_IFREG|0755, st_size=1401027, ...}) = 0
old_mmap(0x42000000, 1264928, PROT_READ|PROT_EXEC, MAP_PRIVATE, 3, 0) =
0x42000000
mprotect(0x4212c000, 36128, PROT_NONE)  = 0
old_mmap(0x4212c000, 20480, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED,
3, 0x12c000) = 0x4212c000
old_mmap(0x42131000, 15648, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x42131000
close(3)                                = 0
munmap(0x40014000, 13466)               = 0
brk(0)                                  = 0x8049b7c
brk(0x8049bac)                          = 0x8049bac
brk(0x804a000)                          = 0x804a000
mlock(0xbffff500, 13466)                = 0
open("/proc/xeno/privcmd", O_RDWR)      = 3
ioctl(3, SNDCTL_DSP_RESET, 0xbffff4e0)  = -1 EPERM (Operation not
permitted)
write(2, "ERROR: Error when executing priv"..., 83ERROR: Error when
executing privileged control ioctl (1 = Operation not permitted)
) = 83
close(3)                                = 0
munlock(0xbffff500, 292)                = 0
_exit(1)                                = ?
[root@oscan18 root]# strace /usr/local/bin/xi_phys_grant rw 1 768 48258
29961162 5
execve("/usr/local/bin/xi_phys_grant", ["/usr/local/bin/xi_phys_grant",
"rw", "1", "768", "48258", "29961162", "5"], [/* 35 vars */]) = 0
uname({sys="Linux", node="oscan18", ...}) = 0
brk(0)                                  = 0x8049b40
open("/etc/ld.so.preload", O_RDONLY)    = -1 ENOENT (No such file or
directory)
open("/etc/ld.so.cache", O_RDONLY)      = 3
fstat64(3, {st_mode=S_IFREG|0644, st_size=13466, ...}) = 0
old_mmap(NULL, 13466, PROT_READ, MAP_PRIVATE, 3, 0) = 0x40014000
close(3)                                = 0
open("/lib/i686/libc.so.6", O_RDONLY)   = 3
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0`u\1B4\0"...,
1024) = 1024
fstat64(3, {st_mode=S_IFREG|0755, st_size=1401027, ...}) = 0
old_mmap(0x42000000, 1264928, PROT_READ|PROT_EXEC, MAP_PRIVATE, 3, 0) =
0x42000000
mprotect(0x4212c000, 36128, PROT_NONE)  = 0
old_mmap(0x4212c000, 20480, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED,
3, 0x12c000) = 0x4212c000
old_mmap(0x42131000, 15648, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x42131000
close(3)                                = 0
munmap(0x40014000, 13466)               = 0
brk(0)                                  = 0x8049b40
brk(0x8049b70)                          = 0x8049b70
brk(0x804a000)                          = 0x804a000
open("/proc/xeno/privcmd", O_RDWR)      = 3
ioctl(3, SOUND_PCM_READ_RATE, 0x300)    = 4096
close(3)                                = 0
open("/proc/xeno/privcmd", O_RDWR)      = 3
ioctl(3, SNDCTL_DSP_SYNC, 0xbffff610)   = -1 EINVAL (Invalid argument)
write(2, "ERROR: Error when executing priv"..., 77ERROR: Error when
executing privileged control ioctl (22 = Invalid argument)
) = 77
close(3)                                = 0
_exit(1)                                = ?
[root@oscan18 root]# uname -a
Linux oscan18 2.4.22-xeno #2 Mon Oct 20 16:58:44 EDT 2003
i686 unknown


On Tue, 21 Oct 2003, Keir Fraser wrote:

> > Failed to create domain using: /usr/local/bin/xi_create 98304 XenoLinux
> > # /usr/local/bin/xi_create 98304 XenoLinux
> > ERROR: Error when executing privileged control ioctl (1 = Operation not
> > permitted)
> > # ./xenctl physical grant -phda5 -w -n1
> > warning: state file not found [/var/lib/xen/vdstate.xml]
> > Could not grant physical access using: /usr/local/bin/xi_phys_grant rw 1
> > 768 48258 29961162 5
>
> You need to run xenctl as root.
>
>  -- Keir
>



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