[uml-devel] Re: [01/07] uml: add nfsd syscall when nfsd is modular

[uml-devel] Re: [01/07] uml: add nfsd syscall when nfsd is modular

[Alan Cox]

On Mer, 2005-04-27 at 18:15, Greg KH wrote:
> -stable review patch.  If anyone has any objections, please let us know.

Don't see why this one is a critical bug.




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[uml-devel] [01/07] uml: add nfsd syscall when nfsd is modular

[Greg KH]

-stable review patch.  If anyone has any objections, please let us know.

------------------


This trick is useless, because sys_ni.c will handle this problem by itself,
like it does even on UML for other syscalls.
Also, it does not provide the NFSD syscall when NFSD is compiled as a module,
which is a big problem.

This should be merged currently in both 2.6.11-stable and the current tree.

Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Chris Wright <chrisw@osdl.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

 clean-linux-2.6.11-paolo/arch/um/kernel/sys_call_table.c |    8 +-------
 1 files changed, 1 insertion(+), 7 deletions(-)

diff -puN arch/um/kernel/sys_call_table.c~uml-nfsd-syscall arch/um/kernel/sys_call_table.c
--- clean-linux-2.6.11/arch/um/kernel/sys_call_table.c~uml-nfsd-syscall	2005-04-10 13:50:29.000000000 +0200
+++ clean-linux-2.6.11-paolo/arch/um/kernel/sys_call_table.c	2005-04-10 13:51:19.000000000 +0200
@@ -14,12 +14,6 @@
 #include "sysdep/syscalls.h"
 #include "kern_util.h"
 
-#ifdef CONFIG_NFSD
-#define NFSSERVCTL sys_nfsservctl
-#else
-#define NFSSERVCTL sys_ni_syscall
-#endif
-
 #define LAST_GENERIC_SYSCALL __NR_keyctl
 
 #if LAST_GENERIC_SYSCALL > LAST_ARCH_SYSCALL
@@ -190,7 +184,7 @@ syscall_handler_t *sys_call_table[] = {
 	[ __NR_getresuid ] = (syscall_handler_t *) sys_getresuid16,
 	[ __NR_query_module ] = (syscall_handler_t *) sys_ni_syscall,
 	[ __NR_poll ] = (syscall_handler_t *) sys_poll,
-	[ __NR_nfsservctl ] = (syscall_handler_t *) NFSSERVCTL,
+	[ __NR_nfsservctl ] = (syscall_handler_t *) sys_nfsservctl,
 	[ __NR_setresgid ] = (syscall_handler_t *) sys_setresgid16,
 	[ __NR_getresgid ] = (syscall_handler_t *) sys_getresgid16,
 	[ __NR_prctl ] = (syscall_handler_t *) sys_prctl,
_


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[uml-devel] [07/07] uml: quick fix syscall table

[Greg KH]

-stable review patch.  If anyone has any objections, please let us know.

------------------

I'm resending this for inclusion in the -stable tree. I've deleted whitespace
cleanups, and hope this can be merged. I've been asked to split the former
patch, I don't know if I must split again this one, even because I don't want
to split this correct patch into multiple non-correct ones by mistake.

Uml 2.6.11 does not compile with gcc 2.95.4 because some entries are
duplicated, and that GCC does not accept this (unlike gcc 3). Plus various
other bugs in the syscall table definitions, resulting in probable wrong
syscall entries:

  *) 223 is a syscall hole (i.e. ni_syscall) only on i386, on x86_64 it's a
  valid syscall (thus a duplicated one).

  *) __NR_vserver must be only once with sys_ni_syscall, and not multiple
  times with different values!

  *) syscalls duplicated in SUBARCHs and in common files (thus assigning twice
  to the same array entry and causing the GCC 2.95.4 failure mentioned above):
  sys_utimes, which is common, and sys_fadvise64_64, sys_statfs64,
  sys_fstatfs64, which exist only on i386.

  *) syscalls duplicated in each SUBARCH, to put in common files:
  sys_remap_file_pages, sys_utimes, sys_fadvise64

  *) 285 is a syscall hole (i.e. ni_syscall) only on i386, on x86_64 the range
  does not arrive to that point.

  *) on x86_64, the macro name is __NR_kexec_load and not __NR_sys_kexec_load.
  Use the correct name in either case.

Note: as you can see, part of the syscall table definition in UML is
arch-independent (with everywhere defined syscalls), and part is
arch-dependant. This has created confusion (some syscalls are listed in both
places, some in the wrong one, some are wrong on one arch or another).

Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

 clean-linux-2.6.11-paolo/arch/um/include/sysdep-i386/syscalls.h   |   12 +++++-----
 clean-linux-2.6.11-paolo/arch/um/include/sysdep-x86_64/syscalls.h |    5 ----
 clean-linux-2.6.11-paolo/arch/um/kernel/sys_call_table.c          |   11 +++------
 3 files changed, 10 insertions(+), 18 deletions(-)

diff -puN arch/um/include/sysdep-i386/syscalls.h~uml-quick-fix-syscall-table-for-stable arch/um/include/sysdep-i386/syscalls.h
--- clean-linux-2.6.11/arch/um/include/sysdep-i386/syscalls.h~uml-quick-fix-syscall-table-for-stable	2005-04-05 16:56:57.000000000 +0200
+++ clean-linux-2.6.11-paolo/arch/um/include/sysdep-i386/syscalls.h	2005-04-05 16:56:57.000000000 +0200
@@ -23,6 +23,9 @@ extern long sys_mmap2(unsigned long addr
 		      unsigned long prot, unsigned long flags,
 		      unsigned long fd, unsigned long pgoff);
 
+/* On i386 they choose a meaningless naming.*/
+#define __NR_kexec_load __NR_sys_kexec_load
+
 #define ARCH_SYSCALLS \
 	[ __NR_waitpid ] = (syscall_handler_t *) sys_waitpid, \
 	[ __NR_break ] = (syscall_handler_t *) sys_ni_syscall, \
@@ -101,15 +104,12 @@ extern long sys_mmap2(unsigned long addr
 	[ 223 ] = (syscall_handler_t *) sys_ni_syscall, \
 	[ __NR_set_thread_area ] = (syscall_handler_t *) sys_ni_syscall, \
 	[ __NR_get_thread_area ] = (syscall_handler_t *) sys_ni_syscall, \
-	[ __NR_fadvise64 ] = (syscall_handler_t *) sys_fadvise64, \
 	[ 251 ] = (syscall_handler_t *) sys_ni_syscall, \
-        [ __NR_remap_file_pages ] = (syscall_handler_t *) sys_remap_file_pages, \
-	[ __NR_utimes ] = (syscall_handler_t *) sys_utimes, \
-	[ __NR_vserver ] = (syscall_handler_t *) sys_ni_syscall,
-        
+	[ 285 ] = (syscall_handler_t *) sys_ni_syscall,
+
 /* 222 doesn't yet have a name in include/asm-i386/unistd.h */
 
-#define LAST_ARCH_SYSCALL __NR_vserver
+#define LAST_ARCH_SYSCALL 285
 
 /*
  * Overrides for Emacs so that we follow Linus's tabbing style.
diff -puN arch/um/include/sysdep-x86_64/syscalls.h~uml-quick-fix-syscall-table-for-stable arch/um/include/sysdep-x86_64/syscalls.h
--- clean-linux-2.6.11/arch/um/include/sysdep-x86_64/syscalls.h~uml-quick-fix-syscall-table-for-stable	2005-04-05 16:56:57.000000000 +0200
+++ clean-linux-2.6.11-paolo/arch/um/include/sysdep-x86_64/syscalls.h	2005-04-05 16:56:57.000000000 +0200
@@ -71,12 +71,7 @@ extern syscall_handler_t sys_arch_prctl;
 	[ __NR_iopl ] = (syscall_handler_t *) sys_ni_syscall, \
 	[ __NR_set_thread_area ] = (syscall_handler_t *) sys_ni_syscall, \
 	[ __NR_get_thread_area ] = (syscall_handler_t *) sys_ni_syscall, \
-        [ __NR_remap_file_pages ] = (syscall_handler_t *) sys_remap_file_pages, \
 	[ __NR_semtimedop ] = (syscall_handler_t *) sys_semtimedop, \
-	[ __NR_fadvise64 ] = (syscall_handler_t *) sys_fadvise64, \
-	[ 223 ] = (syscall_handler_t *) sys_ni_syscall, \
-	[ __NR_utimes ] = (syscall_handler_t *) sys_utimes, \
-	[ __NR_vserver ] = (syscall_handler_t *) sys_ni_syscall, \
 	[ 251 ] = (syscall_handler_t *) sys_ni_syscall,
 
 #define LAST_ARCH_SYSCALL 251
diff -puN arch/um/kernel/sys_call_table.c~uml-quick-fix-syscall-table-for-stable arch/um/kernel/sys_call_table.c
--- clean-linux-2.6.11/arch/um/kernel/sys_call_table.c~uml-quick-fix-syscall-table-for-stable	2005-04-05 16:56:57.000000000 +0200
+++ clean-linux-2.6.11-paolo/arch/um/kernel/sys_call_table.c	2005-04-05 16:56:57.000000000 +0200
@@ -48,7 +48,6 @@ extern syscall_handler_t sys_vfork;
 extern syscall_handler_t old_select;
 extern syscall_handler_t sys_modify_ldt;
 extern syscall_handler_t sys_rt_sigsuspend;
-extern syscall_handler_t sys_vserver;
 extern syscall_handler_t sys_mbind;
 extern syscall_handler_t sys_get_mempolicy;
 extern syscall_handler_t sys_set_mempolicy;
@@ -242,6 +241,7 @@ syscall_handler_t *sys_call_table[] = {
 	[ __NR_epoll_create ] = (syscall_handler_t *) sys_epoll_create,
 	[ __NR_epoll_ctl ] = (syscall_handler_t *) sys_epoll_ctl,
 	[ __NR_epoll_wait ] = (syscall_handler_t *) sys_epoll_wait,
+	[ __NR_remap_file_pages ] = (syscall_handler_t *) sys_remap_file_pages,
         [ __NR_set_tid_address ] = (syscall_handler_t *) sys_set_tid_address,
 	[ __NR_timer_create ] = (syscall_handler_t *) sys_timer_create,
 	[ __NR_timer_settime ] = (syscall_handler_t *) sys_timer_settime,
@@ -252,12 +252,10 @@ syscall_handler_t *sys_call_table[] = {
 	[ __NR_clock_gettime ] = (syscall_handler_t *) sys_clock_gettime,
 	[ __NR_clock_getres ] = (syscall_handler_t *) sys_clock_getres,
 	[ __NR_clock_nanosleep ] = (syscall_handler_t *) sys_clock_nanosleep,
-	[ __NR_statfs64 ] = (syscall_handler_t *) sys_statfs64,
-	[ __NR_fstatfs64 ] = (syscall_handler_t *) sys_fstatfs64,
 	[ __NR_tgkill ] = (syscall_handler_t *) sys_tgkill,
 	[ __NR_utimes ] = (syscall_handler_t *) sys_utimes,
-	[ __NR_fadvise64_64 ] = (syscall_handler_t *) sys_fadvise64_64,
-	[ __NR_vserver ] = (syscall_handler_t *) sys_vserver,
+	[ __NR_fadvise64 ] = (syscall_handler_t *) sys_fadvise64,
+	[ __NR_vserver ] = (syscall_handler_t *) sys_ni_syscall,
 	[ __NR_mbind ] = (syscall_handler_t *) sys_mbind,
 	[ __NR_get_mempolicy ] = (syscall_handler_t *) sys_get_mempolicy,
 	[ __NR_set_mempolicy ] = (syscall_handler_t *) sys_set_mempolicy,
@@ -267,9 +265,8 @@ syscall_handler_t *sys_call_table[] = {
 	[ __NR_mq_timedreceive ] = (syscall_handler_t *) sys_mq_timedreceive,
 	[ __NR_mq_notify ] = (syscall_handler_t *) sys_mq_notify,
 	[ __NR_mq_getsetattr ] = (syscall_handler_t *) sys_mq_getsetattr,
-	[ __NR_sys_kexec_load ] = (syscall_handler_t *) sys_ni_syscall,
+	[ __NR_kexec_load ] = (syscall_handler_t *) sys_ni_syscall,
 	[ __NR_waitid ] = (syscall_handler_t *) sys_waitid,
-	[ 285 ] = (syscall_handler_t *) sys_ni_syscall,
 	[ __NR_add_key ] = (syscall_handler_t *) sys_add_key,
 	[ __NR_request_key ] = (syscall_handler_t *) sys_request_key,
 	[ __NR_keyctl ] = (syscall_handler_t *) sys_keyctl,
_

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[uml-devel] Re: [01/07] uml: add nfsd syscall when nfsd is modular

[Alan Cox]

On Mer, 2005-04-27 at 18:46, Chris Wright wrote:
> > Don't see why this one is a critical bug.
> 
> I guess without it, modular nfsd has no syscall interface (for UML, or
> course).

And the trivial zero risk fix is to compile it in. Its hardly pressing



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[uml-devel] Re: [01/07] uml: add nfsd syscall when nfsd is modular

[Chris Wright]

* Alan Cox (alan@lxorguk.ukuu.org.uk) wrote:
> On Mer, 2005-04-27 at 18:15, Greg KH wrote:
> > -stable review patch.  If anyone has any objections, please let us know.
> 
> Don't see why this one is a critical bug.

I guess without it, modular nfsd has no syscall interface (for UML, or
course).

thanks,
-chris


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[uml-devel] Re: [01/07] uml: add nfsd syscall when nfsd is modular

[Chris Wright]

* Alan Cox (alan@lxorguk.ukuu.org.uk) wrote:
> On Mer, 2005-04-27 at 18:46, Chris Wright wrote:
> > > Don't see why this one is a critical bug.
> > 
> > I guess without it, modular nfsd has no syscall interface (for UML, or
> > course).
> 
> And the trivial zero risk fix is to compile it in. Its hardly pressing

OK, let's drop it.

thanks,
-chris


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[uml-devel] Re: [01/07] uml: add nfsd syscall when nfsd is modular

[Greg KH]

On Wed, Apr 27, 2005 at 11:47:33AM -0700, Chris Wright wrote:
> * Alan Cox (alan@lxorguk.ukuu.org.uk) wrote:
> > On Mer, 2005-04-27 at 18:46, Chris Wright wrote:
> > > > Don't see why this one is a critical bug.
> > > 
> > > I guess without it, modular nfsd has no syscall interface (for UML, or
> > > course).
> > 
> > And the trivial zero risk fix is to compile it in. Its hardly pressing
> 
> OK, let's drop it.

Dropped.

thanks,

greg k-h


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