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linux-user: fix to handle variably sized SIOCGSTAMP with new kernels

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The SIOCGSTAMP symbol was previously defined in the
asm-generic/sockios.h header file. QEMU sees that header
indirectly via sys/socket.h

In linux kernel commit 0768e17073dc527ccd18ed5f96ce85f9985e9115
the asm-generic/sockios.h header no longer defines SIOCGSTAMP.
Instead it provides only SIOCGSTAMP_OLD, which only uses a
32-bit time_t on 32-bit architectures.

The linux/sockios.h header then defines SIOCGSTAMP using
either SIOCGSTAMP_OLD or SIOCGSTAMP_NEW as appropriate. If
SIOCGSTAMP_NEW is used, then the tv_sec field is 64-bit even
on 32-bit architectures

To cope with this we must now convert the old and new type from
the target to the host one.

Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Message-Id: <20190718130641.15294-1-laurent@vivier.eu>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
This commit is contained in:
Daniel P. Berrangé
2019-07-18 15:06:41 +02:00
committed by Laurent Vivier
parent 0acd4ab849
commit 6d5d5dde9a
4 changed files with 159 additions and 38 deletions
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linux-user/ioctls.h
+19 -2
View File
@@ -222,8 +222,25 @@
IOCTL(SIOCGIWNAME, IOC_W | IOC_R, MK_PTR(MK_STRUCT(STRUCT_char_ifreq)))
IOCTL(SIOCSPGRP, IOC_W, MK_PTR(TYPE_INT)) /* pid_t */
IOCTL(SIOCGPGRP, IOC_R, MK_PTR(TYPE_INT)) /* pid_t */
IOCTL(SIOCGSTAMP, IOC_R, MK_PTR(MK_STRUCT(STRUCT_timeval)))
IOCTL(SIOCGSTAMPNS, IOC_R, MK_PTR(MK_STRUCT(STRUCT_timespec)))
/*
* We can't use IOCTL_SPECIAL() because it will set
* host_cmd to XXX_OLD and XXX_NEW and these macros
* are not defined with kernel prior to 5.2.
* We must set host_cmd to the same value as in target_cmd
* otherwise the consistency check in syscall_init()
* will trigger an error.
* host_cmd is ignored by the do_ioctl_XXX() helpers.
* FIXME: create a macro to define this kind of entry
*/
{ TARGET_SIOCGSTAMP_OLD, TARGET_SIOCGSTAMP_OLD,
"SIOCGSTAMP_OLD", IOC_R, do_ioctl_SIOCGSTAMP },
{ TARGET_SIOCGSTAMPNS_OLD, TARGET_SIOCGSTAMPNS_OLD,
"SIOCGSTAMPNS_OLD", IOC_R, do_ioctl_SIOCGSTAMPNS },
{ TARGET_SIOCGSTAMP_NEW, TARGET_SIOCGSTAMP_NEW,
"SIOCGSTAMP_NEW", IOC_R, do_ioctl_SIOCGSTAMP },
{ TARGET_SIOCGSTAMPNS_NEW, TARGET_SIOCGSTAMPNS_NEW,
"SIOCGSTAMPNS_NEW", IOC_R, do_ioctl_SIOCGSTAMPNS },
IOCTL(RNDGETENTCNT, IOC_R, MK_PTR(TYPE_INT))
IOCTL(RNDADDTOENTCNT, IOC_W, MK_PTR(TYPE_INT))