unify compat fanotify_mark(2), switch to COMPAT_SYSCALL_DEFINE

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

arch/arm64/include/asm/unistd32.h

@@ -389,7 +389,7 @@ __SYSCALL(364, sys_perf_event_open)
 __SYSCALL(365, compat_sys_recvmmsg)
 __SYSCALL(366, sys_accept4)
 __SYSCALL(367, sys_fanotify_init)
-__SYSCALL(368, compat_sys_fanotify_mark_wrapper)
+__SYSCALL(368, compat_sys_fanotify_mark)
 __SYSCALL(369, sys_prlimit64)
 __SYSCALL(370, sys_name_to_handle_at)
 __SYSCALL(371, compat_sys_open_by_handle_at)

arch/arm64/kernel/sys32.S

@@ -104,13 +104,6 @@ compat_sys_fallocate_wrapper:
 	b	sys_fallocate
 ENDPROC(compat_sys_fallocate_wrapper)
 
-compat_sys_fanotify_mark_wrapper:
-	orr	x2, x2, x3, lsl #32
-	mov	w3, w4
-	mov	w4, w5
-	b	sys_fanotify_mark
-ENDPROC(compat_sys_fanotify_mark_wrapper)
-
 #undef __SYSCALL
 #define __SYSCALL(x, y)		.quad	y	// x
 

arch/mips/kernel/linux32.c

@@ -165,10 +165,3 @@ asmlinkage long sys32_fallocate(int fd, int mode, unsigned offset_a2,
 	return sys_fallocate(fd, mode, merge_64(offset_a2, offset_a3),
 			     merge_64(len_a4, len_a5));
 }
-
-SYSCALL_DEFINE6(32_fanotify_mark, int, fanotify_fd, unsigned int, flags,
-		u64, a3, u64, a4, int, dfd, const char	__user *, pathname)
-{
-	return sys_fanotify_mark(fanotify_fd, flags, merge_64(a3, a4),
-				 dfd, pathname);
-}

arch/mips/kernel/scall64-o32.S

@@ -529,7 +529,7 @@ sys_call_table:
 	PTR	sys_accept4
 	PTR	compat_sys_recvmmsg		/* 4335 */
 	PTR	sys_fanotify_init
-	PTR	sys_32_fanotify_mark
+	PTR	compat_sys_fanotify_mark
 	PTR	sys_prlimit64
 	PTR	sys_name_to_handle_at
 	PTR	compat_sys_open_by_handle_at	/* 4340 */

arch/parisc/kernel/sys_parisc32.c

@@ -59,11 +59,3 @@ asmlinkage long sys32_unimplemented(int r26, int r25, int r24, int r23,
     	current->comm, current->pid, r20);
     return -ENOSYS;
 }
-
-asmlinkage long compat_sys_fanotify_mark(int fan_fd, int flags, u32 mask_hi,
-					 u32 mask_lo, int fd,
-					 const char __user *pathname)
-{
-	return sys_fanotify_mark(fan_fd, flags, ((u64)mask_hi << 32) | mask_lo,
-				 fd, pathname);
-}

arch/powerpc/kernel/sys_ppc32.c

@@ -126,11 +126,3 @@ asmlinkage long compat_sys_sync_file_range2(int fd, unsigned int flags,
 
 	return sys_sync_file_range(fd, offset, nbytes, flags);
 }
-
-asmlinkage long compat_sys_fanotify_mark(int fanotify_fd, unsigned int flags,
-					 unsigned mask_hi, unsigned mask_lo,
-					 int dfd, const char __user *pathname)
-{
-	u64 mask = ((u64)mask_hi << 32) | mask_lo;
-	return sys_fanotify_mark(fanotify_fd, flags, mask, dfd, pathname);
-}

arch/s390/kernel/compat_wrapper.S

@@ -1349,15 +1349,6 @@ ENTRY(sys_fanotify_init_wrapper)
 	llgfr	%r3,%r3			# unsigned int
 	jg	sys_fanotify_init	# branch to system call
 
-ENTRY(sys_fanotify_mark_wrapper)
-	lgfr	%r2,%r2			# int
-	llgfr	%r3,%r3			# unsigned int
-	sllg	%r4,%r4,32		# get high word of 64bit mask
-	lr	%r4,%r5			# get low word of 64bit mask
-	llgfr	%r5,%r6			# unsigned int
-	llgt	%r6,164(%r15)		# char *
-	jg	sys_fanotify_mark	# branch to system call
-
 ENTRY(sys_prlimit64_wrapper)
 	lgfr	%r2,%r2			# pid_t
 	llgfr	%r3,%r3			# unsigned int

arch/s390/kernel/syscalls.S

@@ -341,7 +341,7 @@ SYSCALL(sys_pwritev,sys_pwritev,compat_sys_pwritev)
 SYSCALL(sys_rt_tgsigqueueinfo,sys_rt_tgsigqueueinfo,compat_sys_rt_tgsigqueueinfo) /* 330 */
 SYSCALL(sys_perf_event_open,sys_perf_event_open,sys_perf_event_open_wrapper)
 SYSCALL(sys_fanotify_init,sys_fanotify_init,sys_fanotify_init_wrapper)
-SYSCALL(sys_fanotify_mark,sys_fanotify_mark,sys_fanotify_mark_wrapper)
+SYSCALL(sys_fanotify_mark,sys_fanotify_mark,compat_sys_fanotify_mark)
 SYSCALL(sys_prlimit64,sys_prlimit64,sys_prlimit64_wrapper)
 SYSCALL(sys_name_to_handle_at,sys_name_to_handle_at,sys_name_to_handle_at_wrapper) /* 335 */
 SYSCALL(sys_open_by_handle_at,sys_open_by_handle_at,compat_sys_open_by_handle_at)

arch/sparc/kernel/sys32.S

@@ -239,15 +239,6 @@ do_sys_accept4: /* sys_accept4(int, struct sockaddr *, int *, int) */
 	nop
 	nop
 
-	.globl		sys32_fanotify_mark
-sys32_fanotify_mark:
-	sethi		%hi(sys_fanotify_mark), %g1
-	sllx		%o2, 32, %o2
-	or		%o2, %o3, %o2
-	mov		%o4, %o3
-	jmpl		%g1 + %lo(sys_fanotify_mark), %g0
-	 mov		%o5, %o4
-
 	.section	__ex_table,"a"
 	.align		4
 	.word		1b, __retl_efault, 2b, __retl_efault

arch/sparc/kernel/systbls_64.S

@@ -84,7 +84,7 @@ sys_call_table32:
 	.word compat_sys_timerfd_settime, compat_sys_timerfd_gettime, compat_sys_signalfd4, sys_eventfd2, sys_epoll_create1
 /*320*/	.word sys_dup3, sys_pipe2, sys_inotify_init1, sys_accept4, compat_sys_preadv
 	.word compat_sys_pwritev, compat_sys_rt_tgsigqueueinfo, sys_perf_event_open, compat_sys_recvmmsg, sys_fanotify_init
-/*330*/	.word sys32_fanotify_mark, sys_prlimit64, sys_name_to_handle_at, compat_sys_open_by_handle_at, compat_sys_clock_adjtime
+/*330*/	.word compat_sys_fanotify_mark, sys_prlimit64, sys_name_to_handle_at, compat_sys_open_by_handle_at, compat_sys_clock_adjtime
 	.word sys_syncfs, compat_sys_sendmmsg, sys_setns, compat_sys_process_vm_readv, compat_sys_process_vm_writev
 /*340*/	.word sys_kern_features, sys_kcmp, sys_finit_module
 

arch/x86/ia32/sys_ia32.c

@@ -243,12 +243,3 @@ asmlinkage long sys32_fallocate(int fd, int mode, unsigned offset_lo,
 	return sys_fallocate(fd, mode, ((u64)offset_hi << 32) | offset_lo,
 			     ((u64)len_hi << 32) | len_lo);
 }
-
-asmlinkage long sys32_fanotify_mark(int fanotify_fd, unsigned int flags,
-				    u32 mask_lo, u32 mask_hi,
-				    int fd, const char  __user *pathname)
-{
-	return sys_fanotify_mark(fanotify_fd, flags,
-				 ((u64)mask_hi << 32) | mask_lo,
-				 fd, pathname);
-}

arch/x86/include/asm/sys_ia32.h

@@ -50,9 +50,6 @@ asmlinkage long sys32_fallocate(int, int, unsigned,
 asmlinkage long sys32_sigreturn(void);
 asmlinkage long sys32_rt_sigreturn(void);
 
-asmlinkage long sys32_fanotify_mark(int, unsigned int, u32, u32, int,
-				    const char __user *);
-
 #endif /* CONFIG_COMPAT */
 
 #endif /* _ASM_X86_SYS_IA32_H */

arch/x86/syscalls/syscall_32.tbl

@@ -345,7 +345,7 @@
 336	i386	perf_event_open		sys_perf_event_open
 337	i386	recvmmsg		sys_recvmmsg			compat_sys_recvmmsg
 338	i386	fanotify_init		sys_fanotify_init
-339	i386	fanotify_mark		sys_fanotify_mark		sys32_fanotify_mark
+339	i386	fanotify_mark		sys_fanotify_mark		compat_sys_fanotify_mark
 340	i386	prlimit64		sys_prlimit64
 341	i386	name_to_handle_at	sys_name_to_handle_at
 342	i386	open_by_handle_at	sys_open_by_handle_at		compat_sys_open_by_handle_at

fs/notify/fanotify/fanotify_user.c

@@ -13,6 +13,7 @@
 #include <linux/slab.h>
 #include <linux/types.h>
 #include <linux/uaccess.h>
+#include <linux/compat.h>
 
 #include <asm/ioctls.h>
 
@@ -857,6 +858,22 @@ SYSCALL_DEFINE5(fanotify_mark, int, fanotify_fd, unsigned int, flags,
 	return ret;
 }
 
+#ifdef CONFIG_COMPAT
+COMPAT_SYSCALL_DEFINE6(fanotify_mark,
+				int, fanotify_fd, unsigned int, flags,
+				__u32, mask0, __u32, mask1, int, dfd,
+				const char  __user *, pathname)
+{
+	return sys_fanotify_mark(fanotify_fd, flags,
+#ifdef __BIG_ENDIAN
+				((__u64)mask1 << 32) | mask0,
+#else
+				((__u64)mask0 << 32) | mask1,
+#endif
+				 dfd, pathname);
+}
+#endif
+
 /*
  * fanotify_user_setup - Our initialization function.  Note that we cannot return
  * error because we have compiled-in VFS hooks.  So an (unlikely) failure here

include/linux/compat.h

@@ -673,6 +673,8 @@ int __compat_save_altstack(compat_stack_t __user *, unsigned long);
 asmlinkage long compat_sys_sched_rr_get_interval(compat_pid_t pid,
 						 struct compat_timespec __user *interval);
 
+asmlinkage long compat_sys_fanotify_mark(int, unsigned int, __u32, __u32,
+					    int, const char __user *);
 #else
 
 #define is_compat_task() (0)

kernel/sys_ni.c

@@ -200,6 +200,7 @@ cond_syscall(sys_perf_event_open);
 /* fanotify! */
 cond_syscall(sys_fanotify_init);
 cond_syscall(sys_fanotify_mark);
+cond_syscall(compat_sys_fanotify_mark);
 
 /* open by handle */
 cond_syscall(sys_name_to_handle_at);