[RFC, PATCH 1/3] introduce SYS_CLONE_MASK

From: Oleg Nesterov
Date: Sun Apr 08 2007 - 11:54:35 EST

For review only.

To implement for-in-kerenl-use-only CLONE_ flags, we need to filter out them
in sys_clone().

These below

arch/sparc/
arch/sparc64/
arch/ia64/
arch/v850/
arch/xtensa/

are not changed, they use assembly to implement sys_clone().

Signed-off-by: Oleg Nesterov <oleg@xxxxxxxxxx>

include/linux/sched.h | 3 +++
arch/alpha/kernel/process.c | 3 ++-
arch/arm/kernel/sys_arm.c | 3 ++-
arch/arm26/kernel/sys_arm.c | 2 +-
arch/avr32/kernel/process.c | 2 +-
arch/blackfin/kernel/process.c | 2 +-
arch/cris/arch-v10/kernel/process.c | 3 ++-
arch/cris/arch-v32/kernel/process.c | 3 ++-
arch/frv/kernel/process.c | 3 ++-
arch/h8300/kernel/process.c | 2 +-
arch/i386/kernel/process.c | 2 +-
arch/m32r/kernel/process.c | 2 +-
arch/m68k/kernel/process.c | 2 +-
arch/m68knommu/kernel/process.c | 2 +-
arch/mips/kernel/linux32.c | 2 +-
arch/mips/kernel/syscall.c | 2 +-
arch/parisc/kernel/process.c | 3 ++-
arch/powerpc/kernel/process.c | 3 ++-
arch/s390/kernel/compat_linux.c | 2 +-
arch/s390/kernel/process.c | 2 +-
arch/sh/kernel/process.c | 2 +-
arch/sh64/kernel/process.c | 2 +-
arch/um/sys-i386/syscalls.c | 4 ++--
arch/um/sys-x86_64/syscalls.c | 4 ++--
arch/x86_64/ia32/sys_ia32.c | 3 ++-
arch/x86_64/kernel/process.c | 3 ++-
arch/xtensa/kernel/process.c | 3 ++-
27 files changed, 41 insertions(+), 28 deletions(-)

--- 2.6.21-rc5-mm4/include/linux/sched.h~1_MASK 2007-04-07 20:11:14.000000000 +0400
+++ 2.6.21-rc5-mm4/include/linux/sched.h 2007-04-07 22:07:50.000000000 +0400
@@ -27,6 +27,9 @@
#define CLONE_NEWUTS 0x04000000 /* New utsname group? */
#define CLONE_NEWIPC 0x08000000 /* New ipcs */

+/* user-space visible */
+#define SYS_CLONE_MASK (~0x0)
+
/*
* Scheduling policies
*/
--- 2.6.21-rc5-mm4/arch/alpha/kernel/process.c~1_MASK 2007-04-07 20:11:11.000000000 +0400
+++ 2.6.21-rc5-mm4/arch/alpha/kernel/process.c 2007-04-07 22:32:37.000000000 +0400
@@ -249,7 +249,8 @@ alpha_clone(unsigned long clone_flags, u
if (!usp)
usp = rdusp();

- return do_fork(clone_flags, usp, regs, 0, parent_tid, child_tid);
+ return do_fork(clone_flags & SYS_CLONE_MASK, usp, regs, 0,
+ parent_tid, child_tid);
}

int
--- 2.6.21-rc5-mm4/arch/arm/kernel/sys_arm.c~1_MASK 2007-01-07 22:57:52.000000000 +0300
+++ 2.6.21-rc5-mm4/arch/arm/kernel/sys_arm.c 2007-04-07 22:10:02.000000000 +0400
@@ -252,7 +252,8 @@ asmlinkage int sys_clone(unsigned long c
if (!newsp)
newsp = regs->ARM_sp;

- return do_fork(clone_flags, newsp, regs, 0, parent_tidptr, child_tidptr);
+ return do_fork(clone_flags & SYS_CLONE_MASK, newsp, regs, 0,
+ parent_tidptr, child_tidptr);
}

asmlinkage int sys_vfork(struct pt_regs *regs)
--- 2.6.21-rc5-mm4/arch/arm26/kernel/sys_arm.c~1_MASK 2006-10-22 18:23:57.000000000 +0400
+++ 2.6.21-rc5-mm4/arch/arm26/kernel/sys_arm.c 2007-04-07 22:29:56.000000000 +0400
@@ -256,7 +256,7 @@ asmlinkage int sys_clone(unsigned long c
if (!newsp)
newsp = regs->ARM_sp;

- return do_fork(clone_flags, newsp, regs, 0, NULL, NULL);
+ return do_fork(clone_flags & SYS_CLONE_MASK, newsp, regs, 0, NULL, NULL);
}

asmlinkage int sys_vfork(struct pt_regs *regs)
--- 2.6.21-rc5-mm4/arch/avr32/kernel/process.c~1_MASK 2007-04-07 20:11:12.000000000 +0400
+++ 2.6.21-rc5-mm4/arch/avr32/kernel/process.c 2007-04-07 22:33:33.000000000 +0400
@@ -359,7 +359,7 @@ asmlinkage int sys_clone(unsigned long c
{
if (!newsp)
newsp = regs->sp;
- return do_fork(clone_flags, newsp, regs, 0,
+ return do_fork(clone_flags & SYS_CLONE_MASK, newsp, regs, 0,
(int __user *)parent_tidptr,
(int __user *)child_tidptr);
}
--- 2.6.21-rc5-mm4/arch/blackfin/kernel/process.c~1_MASK 2007-04-07 20:11:12.000000000 +0400
+++ 2.6.21-rc5-mm4/arch/blackfin/kernel/process.c 2007-04-07 22:51:34.000000000 +0400
@@ -239,7 +239,7 @@ asmlinkage int bfin_clone(struct pt_regs
newsp = rdusp();
else
newsp -= 12;
- return do_fork(clone_flags, newsp, regs, 0, NULL, NULL);
+ return do_fork(clone_flags & SYS_CLONE_MASK, newsp, regs, 0, NULL, NULL);
}

int
--- 2.6.21-rc5-mm4/arch/cris/arch-v10/kernel/process.c~1_MASK 2006-07-29 05:05:33.000000000 +0400
+++ 2.6.21-rc5-mm4/arch/cris/arch-v10/kernel/process.c 2007-04-07 22:25:20.000000000 +0400
@@ -189,7 +189,8 @@ asmlinkage int sys_clone(unsigned long n
{
if (!newusp)
newusp = rdusp();
- return do_fork(flags, newusp, regs, 0, parent_tid, child_tid);
+ return do_fork(flags & SYS_CLONE_MASK, newusp, regs, 0,
+ parent_tid, child_tid);
}

/* vfork is a system call in i386 because of register-pressure - maybe
--- 2.6.21-rc5-mm4/arch/cris/arch-v32/kernel/process.c~1_MASK 2006-07-29 05:05:33.000000000 +0400
+++ 2.6.21-rc5-mm4/arch/cris/arch-v32/kernel/process.c 2007-04-07 22:26:06.000000000 +0400
@@ -206,7 +206,8 @@ sys_clone(unsigned long newusp, unsigned
if (!newusp)
newusp = rdusp();

- return do_fork(flags, newusp, regs, 0, parent_tid, child_tid);
+ return do_fork(flags & SYS_CLONE_MASK, newusp, regs, 0,
+ parent_tid, child_tid);
}

/*
--- 2.6.21-rc5-mm4/arch/frv/kernel/process.c~1_MASK 2006-07-29 05:05:59.000000000 +0400
+++ 2.6.21-rc5-mm4/arch/frv/kernel/process.c 2007-04-07 22:49:02.000000000 +0400
@@ -183,7 +183,8 @@ asmlinkage int sys_clone(unsigned long c
{
if (!newsp)
newsp = user_stack(__frame);
- return do_fork(clone_flags, newsp, __frame, 0, parent_tidptr, child_tidptr);
+ return do_fork(clone_flags & SYS_CLONE_MASK, newsp, __frame, 0,
+ parent_tidptr, child_tidptr);
} /* end sys_clone() */

/*****************************************************************************/
--- 2.6.21-rc5-mm4/arch/h8300/kernel/process.c~1_MASK 2006-07-29 05:05:33.000000000 +0400
+++ 2.6.21-rc5-mm4/arch/h8300/kernel/process.c 2007-04-07 22:36:35.000000000 +0400
@@ -187,7 +187,7 @@ asmlinkage int h8300_clone(struct pt_reg
newsp = regs->er2;
if (!newsp)
newsp = rdusp();
- return do_fork(clone_flags, newsp, regs, 0, NULL, NULL);
+ return do_fork(clone_flags & SYS_CLONE_MASK, newsp, regs, 0, NULL, NULL);

}

--- 2.6.21-rc5-mm4/arch/i386/kernel/process.c~1_MASK 2007-04-07 20:11:12.000000000 +0400
+++ 2.6.21-rc5-mm4/arch/i386/kernel/process.c 2007-04-07 22:05:32.000000000 +0400
@@ -727,7 +727,7 @@ asmlinkage int sys_clone(struct pt_regs
unsigned long newsp;
int __user *parent_tidptr, *child_tidptr;

- clone_flags = regs.ebx;
+ clone_flags = regs.ebx & SYS_CLONE_MASK;
newsp = regs.ecx;
parent_tidptr = (int __user *)regs.edx;
child_tidptr = (int __user *)regs.edi;
--- 2.6.21-rc5-mm4/arch/m32r/kernel/process.c~1_MASK 2007-04-05 12:18:26.000000000 +0400
+++ 2.6.21-rc5-mm4/arch/m32r/kernel/process.c 2007-04-07 22:48:08.000000000 +0400
@@ -289,7 +289,7 @@ asmlinkage int sys_clone(unsigned long c
if (!newsp)
newsp = regs.spu;

- return do_fork(clone_flags, newsp, &regs, 0,
+ return do_fork(clone_flags & SYS_CLONE_MASK, newsp, &regs, 0,
(int __user *)parent_tidptr, (int __user *)child_tidptr);
}

--- 2.6.21-rc5-mm4/arch/m68k/kernel/process.c~1_MASK 2006-10-22 18:24:17.000000000 +0400
+++ 2.6.21-rc5-mm4/arch/m68k/kernel/process.c 2007-04-07 22:31:14.000000000 +0400
@@ -225,7 +225,7 @@ asmlinkage int m68k_clone(struct pt_regs
int __user *parent_tidptr, *child_tidptr;

/* syscall2 puts clone_flags in d1 and usp in d2 */
- clone_flags = regs->d1;
+ clone_flags = regs->d1 & SYS_CLONE_MASK;
newsp = regs->d2;
parent_tidptr = (int __user *)regs->d3;
child_tidptr = (int __user *)regs->d4;
--- 2.6.21-rc5-mm4/arch/m68knommu/kernel/process.c~1_MASK 2006-12-17 19:06:39.000000000 +0300
+++ 2.6.21-rc5-mm4/arch/m68knommu/kernel/process.c 2007-04-07 22:15:46.000000000 +0400
@@ -192,7 +192,7 @@ asmlinkage int m68k_clone(struct pt_regs
unsigned long newsp;

/* syscall2 puts clone_flags in d1 and usp in d2 */
- clone_flags = regs->d1;
+ clone_flags = regs->d1 & SYS_CLONE_MASK;
newsp = regs->d2;
if (!newsp)
newsp = rdusp();
--- 2.6.21-rc5-mm4/arch/mips/kernel/linux32.c~1_MASK 2007-04-05 12:18:26.000000000 +0400
+++ 2.6.21-rc5-mm4/arch/mips/kernel/linux32.c 2007-04-07 22:11:23.000000000 +0400
@@ -564,7 +564,7 @@ _sys32_clone(nabi_no_regargs struct pt_r
unsigned long newsp;
int __user *parent_tidptr, *child_tidptr;

- clone_flags = regs.regs[4];
+ clone_flags = regs.regs[4] & SYS_CLONE_MASK;
newsp = regs.regs[5];
if (!newsp)
newsp = regs.regs[29];
--- 2.6.21-rc5-mm4/arch/mips/kernel/syscall.c~1_MASK 2007-04-07 20:11:12.000000000 +0400
+++ 2.6.21-rc5-mm4/arch/mips/kernel/syscall.c 2007-04-07 22:12:57.000000000 +0400
@@ -181,7 +181,7 @@ _sys_clone(nabi_no_regargs struct pt_reg
unsigned long newsp;
int __user *parent_tidptr, *child_tidptr;

- clone_flags = regs.regs[4];
+ clone_flags = regs.regs[4] & SYS_CLONE_MASK;
newsp = regs.regs[5];
if (!newsp)
newsp = regs.regs[29];
--- 2.6.21-rc5-mm4/arch/parisc/kernel/process.c~1_MASK 2007-04-05 12:18:26.000000000 +0400
+++ 2.6.21-rc5-mm4/arch/parisc/kernel/process.c 2007-04-07 22:34:56.000000000 +0400
@@ -252,7 +252,8 @@ sys_clone(unsigned long clone_flags, uns
else
child_tidptr = NULL;

- return do_fork(clone_flags, usp, regs, 0, parent_tidptr, child_tidptr);
+ return do_fork(clone_flags & SYS_CLONE_MASK, usp, regs, 0,
+ parent_tidptr, child_tidptr);
}

int
--- 2.6.21-rc5-mm4/arch/powerpc/kernel/process.c~1_MASK 2007-04-07 20:11:12.000000000 +0400
+++ 2.6.21-rc5-mm4/arch/powerpc/kernel/process.c 2007-04-07 22:50:41.000000000 +0400
@@ -775,7 +775,8 @@ int sys_clone(unsigned long clone_flags,
child_tidp = TRUNC_PTR(child_tidp);
}
#endif
- return do_fork(clone_flags, usp, regs, 0, parent_tidp, child_tidp);
+ return do_fork(clone_flags & SYS_CLONE_MASK, usp, regs, 0,
+ parent_tidp, child_tidp);
}

int sys_fork(unsigned long p1, unsigned long p2, unsigned long p3,
--- 2.6.21-rc5-mm4/arch/s390/kernel/compat_linux.c~1_MASK 2007-04-07 20:11:12.000000000 +0400
+++ 2.6.21-rc5-mm4/arch/s390/kernel/compat_linux.c 2007-04-07 22:47:20.000000000 +0400
@@ -927,7 +927,7 @@ asmlinkage long sys32_clone(void)
unsigned long newsp;
int __user *parent_tidptr, *child_tidptr;

- clone_flags = regs->gprs[3] & 0xffffffffUL;
+ clone_flags = regs->gprs[3] & SYS_CLONE_MASK;
newsp = regs->orig_gpr2 & 0x7fffffffUL;
parent_tidptr = compat_ptr(regs->gprs[4]);
child_tidptr = compat_ptr(regs->gprs[5]);
--- 2.6.21-rc5-mm4/arch/s390/kernel/process.c~1_MASK 2007-04-07 20:11:12.000000000 +0400
+++ 2.6.21-rc5-mm4/arch/s390/kernel/process.c 2007-04-07 22:39:48.000000000 +0400
@@ -292,7 +292,7 @@ asmlinkage long sys_clone(void)
unsigned long newsp;
int __user *parent_tidptr, *child_tidptr;

- clone_flags = regs->gprs[3];
+ clone_flags = regs->gprs[3] & SYS_CLONE_MASK;
newsp = regs->orig_gpr2;
parent_tidptr = (int __user *) regs->gprs[4];
child_tidptr = (int __user *) regs->gprs[5];
--- 2.6.21-rc5-mm4/arch/sh/kernel/process.c~1_MASK 2007-04-05 12:18:26.000000000 +0400
+++ 2.6.21-rc5-mm4/arch/sh/kernel/process.c 2007-04-07 22:19:43.000000000 +0400
@@ -393,7 +393,7 @@ asmlinkage int sys_clone(unsigned long c
struct pt_regs *regs = RELOC_HIDE(&__regs, 0);
if (!newsp)
newsp = regs->regs[15];
- return do_fork(clone_flags, newsp, regs, 0,
+ return do_fork(clone_flags & SYS_CLONE_MASK, newsp, regs, 0,
(int __user *)parent_tidptr,
(int __user *)child_tidptr);
}
--- 2.6.21-rc5-mm4/arch/sh64/kernel/process.c~1_MASK 2006-10-22 18:23:58.000000000 +0400
+++ 2.6.21-rc5-mm4/arch/sh64/kernel/process.c 2007-04-07 22:37:20.000000000 +0400
@@ -548,7 +548,7 @@ asmlinkage int sys_clone(unsigned long c
{
if (!newsp)
newsp = pregs->regs[15];
- return do_fork(clone_flags, newsp, pregs, 0, 0, 0);
+ return do_fork(clone_flags & SYS_CLONE_MASK, newsp, pregs, 0, 0, 0);
}

/*
--- 2.6.21-rc5-mm4/arch/um/sys-i386/syscalls.c~1_MASK 2006-06-13 04:28:07.000000000 +0400
+++ 2.6.21-rc5-mm4/arch/um/sys-i386/syscalls.c 2007-04-07 22:21:53.000000000 +0400
@@ -78,8 +78,8 @@ long sys_clone(unsigned long clone_flags
newsp = UPT_SP(&current->thread.regs.regs);

current->thread.forking = 1;
- ret = do_fork(clone_flags, newsp, &current->thread.regs, 0, parent_tid,
- child_tid);
+ ret = do_fork(clone_flags & SYS_CLONE_MASK, newsp,
+ &current->thread.regs, 0, parent_tid, child_tid);
current->thread.forking = 0;
return ret;
}
--- 2.6.21-rc5-mm4/arch/um/sys-x86_64/syscalls.c~1_MASK 2007-04-05 12:18:26.000000000 +0400
+++ 2.6.21-rc5-mm4/arch/um/sys-x86_64/syscalls.c 2007-04-07 22:23:27.000000000 +0400
@@ -135,8 +135,8 @@ long sys_clone(unsigned long clone_flags
if (!newsp)
newsp = UPT_SP(&current->thread.regs.regs);
current->thread.forking = 1;
- ret = do_fork(clone_flags, newsp, &current->thread.regs, 0, parent_tid,
- child_tid);
+ ret = do_fork(clone_flags & SYS_CLONE_MASK, newsp,
+ &current->thread.regs, 0, parent_tid, child_tid);
current->thread.forking = 0;
return ret;
}
--- 2.6.21-rc5-mm4/arch/x86_64/ia32/sys_ia32.c~1_MASK 2007-04-07 20:11:12.000000000 +0400
+++ 2.6.21-rc5-mm4/arch/x86_64/ia32/sys_ia32.c 2007-04-07 22:38:50.000000000 +0400
@@ -811,7 +811,8 @@ asmlinkage long sys32_clone(unsigned int
void __user *child_tid = (void __user *)regs->rdi;
if (!newsp)
newsp = regs->rsp;
- return do_fork(clone_flags, newsp, regs, 0, parent_tid, child_tid);
+ return do_fork(clone_flags & SYS_CLONE_MASK, newsp, regs, 0,
+ parent_tid, child_tid);
}

/*
--- 2.6.21-rc5-mm4/arch/x86_64/kernel/process.c~1_MASK 2007-04-07 20:11:12.000000000 +0400
+++ 2.6.21-rc5-mm4/arch/x86_64/kernel/process.c 2007-04-07 22:37:57.000000000 +0400
@@ -715,7 +715,8 @@ sys_clone(unsigned long clone_flags, uns
{
if (!newsp)
newsp = regs->rsp;
- return do_fork(clone_flags, newsp, regs, 0, parent_tid, child_tid);
+ return do_fork(clone_flags & SYS_CLONE_MASK, newsp, regs, 0,
+ parent_tid, child_tid);
}

/*
--- 2.6.21-rc5-mm4/arch/xtensa/kernel/process.c~1_MASK 2007-04-07 20:11:12.000000000 +0400
+++ 2.6.21-rc5-mm4/arch/xtensa/kernel/process.c 2007-04-07 22:50:02.000000000 +0400
@@ -430,7 +430,8 @@ long xtensa_clone(unsigned long clone_fl
{
if (!newsp)
newsp = regs->areg[1];
- return do_fork(clone_flags, newsp, regs, 0, parent_tid, child_tid);
+ return do_fork(clone_flags & SYS_CLONE_MASK, newsp, regs, 0,
+ parent_tid, child_tid);
}

/*

-
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