From: guoren@kernel.org
To: guoren@kernel.org, palmer@dabbelt.com, arnd@arndb.de,
gregkh@linuxfoundation.org, hch@lst.de, nathan@kernel.org,
naresh.kamboju@linaro.org
Cc: linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org,
sparclinux@vger.kernel.org, linuxppc-dev@lists.ozlabs.org,
linux-parisc@vger.kernel.org, linux-mips@vger.kernel.org,
linux-arm-kernel@lists.infradead.org, x86@kernel.org,
heiko@sntech.de, Guo Ren <guoren@linux.alibaba.com>
Subject: [PATCH V12 11/20] riscv: compat: syscall: Add compat_sys_call_table implementation
Date: Tue, 5 Apr 2022 15:13:05 +0800 [thread overview]
Message-ID: <20220405071314.3225832-12-guoren@kernel.org> (raw)
In-Reply-To: <20220405071314.3225832-1-guoren@kernel.org>
From: Guo Ren <guoren@linux.alibaba.com>
Implement compat sys_call_table and some system call functions:
truncate64, ftruncate64, fallocate, pread64, pwrite64,
sync_file_range, readahead, fadvise64_64 which need argument
translation.
Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
Signed-off-by: Guo Ren <guoren@kernel.org>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
---
arch/riscv/include/asm/syscall.h | 1 +
arch/riscv/include/asm/unistd.h | 11 +++++++
arch/riscv/include/uapi/asm/unistd.h | 2 +-
arch/riscv/kernel/Makefile | 1 +
arch/riscv/kernel/compat_syscall_table.c | 19 ++++++++++++
arch/riscv/kernel/sys_riscv.c | 6 ++--
fs/open.c | 24 +++++++++++++++
fs/read_write.c | 16 ++++++++++
fs/sync.c | 9 ++++++
include/asm-generic/compat.h | 7 +++++
include/linux/compat.h | 37 ++++++++++++++++++++++++
mm/fadvise.c | 11 +++++++
mm/readahead.c | 7 +++++
13 files changed, 148 insertions(+), 3 deletions(-)
create mode 100644 arch/riscv/kernel/compat_syscall_table.c
diff --git a/arch/riscv/include/asm/syscall.h b/arch/riscv/include/asm/syscall.h
index 7ac6a0e275f2..384a63b86420 100644
--- a/arch/riscv/include/asm/syscall.h
+++ b/arch/riscv/include/asm/syscall.h
@@ -16,6 +16,7 @@
/* The array of function pointers for syscalls. */
extern void * const sys_call_table[];
+extern void * const compat_sys_call_table[];
/*
* Only the low 32 bits of orig_r0 are meaningful, so we return int.
diff --git a/arch/riscv/include/asm/unistd.h b/arch/riscv/include/asm/unistd.h
index 6c316093a1e5..5ddac412b578 100644
--- a/arch/riscv/include/asm/unistd.h
+++ b/arch/riscv/include/asm/unistd.h
@@ -11,6 +11,17 @@
#define __ARCH_WANT_SYS_CLONE
#define __ARCH_WANT_MEMFD_SECRET
+#ifdef CONFIG_COMPAT
+#define __ARCH_WANT_COMPAT_TRUNCATE64
+#define __ARCH_WANT_COMPAT_FTRUNCATE64
+#define __ARCH_WANT_COMPAT_FALLOCATE
+#define __ARCH_WANT_COMPAT_PREAD64
+#define __ARCH_WANT_COMPAT_PWRITE64
+#define __ARCH_WANT_COMPAT_SYNC_FILE_RANGE
+#define __ARCH_WANT_COMPAT_READAHEAD
+#define __ARCH_WANT_COMPAT_FADVISE64_64
+#endif
+
#include <uapi/asm/unistd.h>
#define NR_syscalls (__NR_syscalls)
diff --git a/arch/riscv/include/uapi/asm/unistd.h b/arch/riscv/include/uapi/asm/unistd.h
index 8062996c2dfd..c9e50eed14aa 100644
--- a/arch/riscv/include/uapi/asm/unistd.h
+++ b/arch/riscv/include/uapi/asm/unistd.h
@@ -15,7 +15,7 @@
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
-#ifdef __LP64__
+#if defined(__LP64__) && !defined(__SYSCALL_COMPAT)
#define __ARCH_WANT_NEW_STAT
#define __ARCH_WANT_SET_GET_RLIMIT
#endif /* __LP64__ */
diff --git a/arch/riscv/kernel/Makefile b/arch/riscv/kernel/Makefile
index 87adbe47bc15..2fa06d6572bb 100644
--- a/arch/riscv/kernel/Makefile
+++ b/arch/riscv/kernel/Makefile
@@ -69,3 +69,4 @@ obj-$(CONFIG_CRASH_DUMP) += crash_dump.o
obj-$(CONFIG_JUMP_LABEL) += jump_label.o
obj-$(CONFIG_EFI) += efi.o
+obj-$(CONFIG_COMPAT) += compat_syscall_table.o
diff --git a/arch/riscv/kernel/compat_syscall_table.c b/arch/riscv/kernel/compat_syscall_table.c
new file mode 100644
index 000000000000..651f2b009c28
--- /dev/null
+++ b/arch/riscv/kernel/compat_syscall_table.c
@@ -0,0 +1,19 @@
+// SPDX-License-Identifier: GPL-2.0-only
+
+#define __SYSCALL_COMPAT
+
+#include <linux/compat.h>
+#include <linux/syscalls.h>
+#include <asm-generic/mman-common.h>
+#include <asm-generic/syscalls.h>
+#include <asm/syscall.h>
+
+#undef __SYSCALL
+#define __SYSCALL(nr, call) [nr] = (call),
+
+asmlinkage long compat_sys_rt_sigreturn(void);
+
+void * const compat_sys_call_table[__NR_syscalls] = {
+ [0 ... __NR_syscalls - 1] = sys_ni_syscall,
+#include <asm/unistd.h>
+};
diff --git a/arch/riscv/kernel/sys_riscv.c b/arch/riscv/kernel/sys_riscv.c
index 12f8a7fce78b..9c0194f176fc 100644
--- a/arch/riscv/kernel/sys_riscv.c
+++ b/arch/riscv/kernel/sys_riscv.c
@@ -33,7 +33,9 @@ SYSCALL_DEFINE6(mmap, unsigned long, addr, unsigned long, len,
{
return riscv_sys_mmap(addr, len, prot, flags, fd, offset, 0);
}
-#else
+#endif
+
+#if defined(CONFIG_32BIT) || defined(CONFIG_COMPAT)
SYSCALL_DEFINE6(mmap2, unsigned long, addr, unsigned long, len,
unsigned long, prot, unsigned long, flags,
unsigned long, fd, off_t, offset)
@@ -44,7 +46,7 @@ SYSCALL_DEFINE6(mmap2, unsigned long, addr, unsigned long, len,
*/
return riscv_sys_mmap(addr, len, prot, flags, fd, offset, 12);
}
-#endif /* !CONFIG_64BIT */
+#endif
/*
* Allows the instruction cache to be flushed from userspace. Despite RISC-V
diff --git a/fs/open.c b/fs/open.c
index 1315253e0247..0573eebb68a6 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -224,6 +224,21 @@ SYSCALL_DEFINE2(ftruncate64, unsigned int, fd, loff_t, length)
}
#endif /* BITS_PER_LONG == 32 */
+#if defined(CONFIG_COMPAT) && defined(__ARCH_WANT_COMPAT_TRUNCATE64)
+COMPAT_SYSCALL_DEFINE3(truncate64, const char __user *, pathname,
+ compat_arg_u64_dual(length))
+{
+ return ksys_truncate(pathname, compat_arg_u64_glue(length));
+}
+#endif
+
+#if defined(CONFIG_COMPAT) && defined(__ARCH_WANT_COMPAT_FTRUNCATE64)
+COMPAT_SYSCALL_DEFINE3(ftruncate64, unsigned int, fd,
+ compat_arg_u64_dual(length))
+{
+ return ksys_ftruncate(fd, compat_arg_u64_glue(length));
+}
+#endif
int vfs_fallocate(struct file *file, int mode, loff_t offset, loff_t len)
{
@@ -339,6 +354,15 @@ SYSCALL_DEFINE4(fallocate, int, fd, int, mode, loff_t, offset, loff_t, len)
return ksys_fallocate(fd, mode, offset, len);
}
+#if defined(CONFIG_COMPAT) && defined(__ARCH_WANT_COMPAT_FALLOCATE)
+COMPAT_SYSCALL_DEFINE6(fallocate, int, fd, int, mode, compat_arg_u64_dual(offset),
+ compat_arg_u64_dual(len))
+{
+ return ksys_fallocate(fd, mode, compat_arg_u64_glue(offset),
+ compat_arg_u64_glue(len));
+}
+#endif
+
/*
* access() needs to use the real uid/gid, not the effective uid/gid.
* We do this by temporarily clearing all FS-related capabilities and
diff --git a/fs/read_write.c b/fs/read_write.c
index e643aec2b0ef..b1b1cdfee9d3 100644
--- a/fs/read_write.c
+++ b/fs/read_write.c
@@ -682,6 +682,14 @@ SYSCALL_DEFINE4(pread64, unsigned int, fd, char __user *, buf,
return ksys_pread64(fd, buf, count, pos);
}
+#if defined(CONFIG_COMPAT) && defined(__ARCH_WANT_COMPAT_PREAD64)
+COMPAT_SYSCALL_DEFINE5(pread64, unsigned int, fd, char __user *, buf,
+ size_t, count, compat_arg_u64_dual(pos))
+{
+ return ksys_pread64(fd, buf, count, compat_arg_u64_glue(pos));
+}
+#endif
+
ssize_t ksys_pwrite64(unsigned int fd, const char __user *buf,
size_t count, loff_t pos)
{
@@ -708,6 +716,14 @@ SYSCALL_DEFINE4(pwrite64, unsigned int, fd, const char __user *, buf,
return ksys_pwrite64(fd, buf, count, pos);
}
+#if defined(CONFIG_COMPAT) && defined(__ARCH_WANT_COMPAT_PWRITE64)
+COMPAT_SYSCALL_DEFINE5(pwrite64, unsigned int, fd, const char __user *, buf,
+ size_t, count, compat_arg_u64_dual(pos))
+{
+ return ksys_pwrite64(fd, buf, count, compat_arg_u64_glue(pos));
+}
+#endif
+
static ssize_t do_iter_readv_writev(struct file *filp, struct iov_iter *iter,
loff_t *ppos, int type, rwf_t flags)
{
diff --git a/fs/sync.c b/fs/sync.c
index c7690016453e..dc725914e1ed 100644
--- a/fs/sync.c
+++ b/fs/sync.c
@@ -373,6 +373,15 @@ SYSCALL_DEFINE4(sync_file_range, int, fd, loff_t, offset, loff_t, nbytes,
return ksys_sync_file_range(fd, offset, nbytes, flags);
}
+#if defined(CONFIG_COMPAT) && defined(__ARCH_WANT_COMPAT_SYNC_FILE_RANGE)
+COMPAT_SYSCALL_DEFINE6(sync_file_range, int, fd, compat_arg_u64_dual(offset),
+ compat_arg_u64_dual(nbytes), unsigned int, flags)
+{
+ return ksys_sync_file_range(fd, compat_arg_u64_glue(offset),
+ compat_arg_u64_glue(nbytes), flags);
+}
+#endif
+
/* It would be nice if people remember that not all the world's an i386
when they introduce new system calls */
SYSCALL_DEFINE4(sync_file_range2, int, fd, unsigned int, flags,
diff --git a/include/asm-generic/compat.h b/include/asm-generic/compat.h
index 11653d6846cc..d06308a2a7a8 100644
--- a/include/asm-generic/compat.h
+++ b/include/asm-generic/compat.h
@@ -14,6 +14,13 @@
#define COMPAT_OFF_T_MAX 0x7fffffff
#endif
+#if !defined(compat_arg_u64) && !defined(CONFIG_CPU_BIG_ENDIAN)
+#define compat_arg_u64(name) u32 name##_lo, u32 name##_hi
+#define compat_arg_u64_dual(name) u32, name##_lo, u32, name##_hi
+#define compat_arg_u64_glue(name) (((u64)name##_lo & 0xffffffffUL) | \
+ ((u64)name##_hi << 32))
+#endif
+
/* These types are common across all compat ABIs */
typedef u32 compat_size_t;
typedef s32 compat_ssize_t;
diff --git a/include/linux/compat.h b/include/linux/compat.h
index a0481fe6c5d5..ce6cd9b30d27 100644
--- a/include/linux/compat.h
+++ b/include/linux/compat.h
@@ -926,6 +926,43 @@ asmlinkage long compat_sys_sigaction(int sig,
/* obsolete: net/socket.c */
asmlinkage long compat_sys_socketcall(int call, u32 __user *args);
+#ifdef __ARCH_WANT_COMPAT_TRUNCATE64
+asmlinkage long compat_sys_truncate64(const char __user *pathname, compat_arg_u64(len));
+#endif
+
+#ifdef __ARCH_WANT_COMPAT_FTRUNCATE64
+asmlinkage long compat_sys_ftruncate64(unsigned int fd, compat_arg_u64(len));
+#endif
+
+#ifdef __ARCH_WANT_COMPAT_FALLOCATE
+asmlinkage long compat_sys_fallocate(int fd, int mode, compat_arg_u64(offset),
+ compat_arg_u64(len));
+#endif
+
+#ifdef __ARCH_WANT_COMPAT_PREAD64
+asmlinkage long compat_sys_pread64(unsigned int fd, char __user *buf, size_t count,
+ compat_arg_u64(pos));
+#endif
+
+#ifdef __ARCH_WANT_COMPAT_PWRITE64
+asmlinkage long compat_sys_pwrite64(unsigned int fd, const char __user *buf, size_t count,
+ compat_arg_u64(pos));
+#endif
+
+#ifdef __ARCH_WANT_COMPAT_SYNC_FILE_RANGE
+asmlinkage long compat_sys_sync_file_range(int fd, compat_arg_u64(pos),
+ compat_arg_u64(nbytes), unsigned int flags);
+#endif
+
+#ifdef __ARCH_WANT_COMPAT_FADVISE64_64
+asmlinkage long compat_sys_fadvise64_64(int fd, compat_arg_u64(pos),
+ compat_arg_u64(len), int advice);
+#endif
+
+#ifdef __ARCH_WANT_COMPAT_READAHEAD
+asmlinkage long compat_sys_readahead(int fd, compat_arg_u64(offset), size_t count);
+#endif
+
#endif /* CONFIG_ARCH_HAS_SYSCALL_WRAPPER */
/**
diff --git a/mm/fadvise.c b/mm/fadvise.c
index 338f16022012..c76ee665355a 100644
--- a/mm/fadvise.c
+++ b/mm/fadvise.c
@@ -214,5 +214,16 @@ SYSCALL_DEFINE4(fadvise64, int, fd, loff_t, offset, size_t, len, int, advice)
return ksys_fadvise64_64(fd, offset, len, advice);
}
+#endif
+
+#if defined(CONFIG_COMPAT) && defined(__ARCH_WANT_COMPAT_FADVISE64_64)
+
+COMPAT_SYSCALL_DEFINE6(fadvise64_64, int, fd, compat_arg_u64_dual(offset),
+ compat_arg_u64_dual(len), int, advice)
+{
+ return ksys_fadvise64_64(fd, compat_arg_u64_glue(offset),
+ compat_arg_u64_glue(len), advice);
+}
+
#endif
#endif
diff --git a/mm/readahead.c b/mm/readahead.c
index 8e3775829513..a9ba3bb19ad0 100644
--- a/mm/readahead.c
+++ b/mm/readahead.c
@@ -746,6 +746,13 @@ SYSCALL_DEFINE3(readahead, int, fd, loff_t, offset, size_t, count)
return ksys_readahead(fd, offset, count);
}
+#if defined(CONFIG_COMPAT) && defined(__ARCH_WANT_COMPAT_READAHEAD)
+COMPAT_SYSCALL_DEFINE4(readahead, int, fd, compat_arg_u64_dual(offset), size_t, count)
+{
+ return ksys_readahead(fd, compat_arg_u64_glue(offset), count);
+}
+#endif
+
/**
* readahead_expand - Expand a readahead request
* @ractl: The request to be expanded
--
2.25.1
WARNING: multiple messages have this Message-ID (diff)
From: guoren@kernel.org
To: guoren@kernel.org, palmer@dabbelt.com, arnd@arndb.de,
gregkh@linuxfoundation.org, hch@lst.de, nathan@kernel.org,
naresh.kamboju@linaro.org
Cc: linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org,
sparclinux@vger.kernel.org, linuxppc-dev@lists.ozlabs.org,
linux-parisc@vger.kernel.org, linux-mips@vger.kernel.org,
linux-arm-kernel@lists.infradead.org, x86@kernel.org,
heiko@sntech.de, Guo Ren <guoren@linux.alibaba.com>
Subject: [PATCH V12 11/20] riscv: compat: syscall: Add compat_sys_call_table implementation
Date: Tue, 5 Apr 2022 15:13:05 +0800 [thread overview]
Message-ID: <20220405071314.3225832-12-guoren@kernel.org> (raw)
In-Reply-To: <20220405071314.3225832-1-guoren@kernel.org>
From: Guo Ren <guoren@linux.alibaba.com>
Implement compat sys_call_table and some system call functions:
truncate64, ftruncate64, fallocate, pread64, pwrite64,
sync_file_range, readahead, fadvise64_64 which need argument
translation.
Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
Signed-off-by: Guo Ren <guoren@kernel.org>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
---
arch/riscv/include/asm/syscall.h | 1 +
arch/riscv/include/asm/unistd.h | 11 +++++++
arch/riscv/include/uapi/asm/unistd.h | 2 +-
arch/riscv/kernel/Makefile | 1 +
arch/riscv/kernel/compat_syscall_table.c | 19 ++++++++++++
arch/riscv/kernel/sys_riscv.c | 6 ++--
fs/open.c | 24 +++++++++++++++
fs/read_write.c | 16 ++++++++++
fs/sync.c | 9 ++++++
include/asm-generic/compat.h | 7 +++++
include/linux/compat.h | 37 ++++++++++++++++++++++++
mm/fadvise.c | 11 +++++++
mm/readahead.c | 7 +++++
13 files changed, 148 insertions(+), 3 deletions(-)
create mode 100644 arch/riscv/kernel/compat_syscall_table.c
diff --git a/arch/riscv/include/asm/syscall.h b/arch/riscv/include/asm/syscall.h
index 7ac6a0e275f2..384a63b86420 100644
--- a/arch/riscv/include/asm/syscall.h
+++ b/arch/riscv/include/asm/syscall.h
@@ -16,6 +16,7 @@
/* The array of function pointers for syscalls. */
extern void * const sys_call_table[];
+extern void * const compat_sys_call_table[];
/*
* Only the low 32 bits of orig_r0 are meaningful, so we return int.
diff --git a/arch/riscv/include/asm/unistd.h b/arch/riscv/include/asm/unistd.h
index 6c316093a1e5..5ddac412b578 100644
--- a/arch/riscv/include/asm/unistd.h
+++ b/arch/riscv/include/asm/unistd.h
@@ -11,6 +11,17 @@
#define __ARCH_WANT_SYS_CLONE
#define __ARCH_WANT_MEMFD_SECRET
+#ifdef CONFIG_COMPAT
+#define __ARCH_WANT_COMPAT_TRUNCATE64
+#define __ARCH_WANT_COMPAT_FTRUNCATE64
+#define __ARCH_WANT_COMPAT_FALLOCATE
+#define __ARCH_WANT_COMPAT_PREAD64
+#define __ARCH_WANT_COMPAT_PWRITE64
+#define __ARCH_WANT_COMPAT_SYNC_FILE_RANGE
+#define __ARCH_WANT_COMPAT_READAHEAD
+#define __ARCH_WANT_COMPAT_FADVISE64_64
+#endif
+
#include <uapi/asm/unistd.h>
#define NR_syscalls (__NR_syscalls)
diff --git a/arch/riscv/include/uapi/asm/unistd.h b/arch/riscv/include/uapi/asm/unistd.h
index 8062996c2dfd..c9e50eed14aa 100644
--- a/arch/riscv/include/uapi/asm/unistd.h
+++ b/arch/riscv/include/uapi/asm/unistd.h
@@ -15,7 +15,7 @@
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
-#ifdef __LP64__
+#if defined(__LP64__) && !defined(__SYSCALL_COMPAT)
#define __ARCH_WANT_NEW_STAT
#define __ARCH_WANT_SET_GET_RLIMIT
#endif /* __LP64__ */
diff --git a/arch/riscv/kernel/Makefile b/arch/riscv/kernel/Makefile
index 87adbe47bc15..2fa06d6572bb 100644
--- a/arch/riscv/kernel/Makefile
+++ b/arch/riscv/kernel/Makefile
@@ -69,3 +69,4 @@ obj-$(CONFIG_CRASH_DUMP) += crash_dump.o
obj-$(CONFIG_JUMP_LABEL) += jump_label.o
obj-$(CONFIG_EFI) += efi.o
+obj-$(CONFIG_COMPAT) += compat_syscall_table.o
diff --git a/arch/riscv/kernel/compat_syscall_table.c b/arch/riscv/kernel/compat_syscall_table.c
new file mode 100644
index 000000000000..651f2b009c28
--- /dev/null
+++ b/arch/riscv/kernel/compat_syscall_table.c
@@ -0,0 +1,19 @@
+// SPDX-License-Identifier: GPL-2.0-only
+
+#define __SYSCALL_COMPAT
+
+#include <linux/compat.h>
+#include <linux/syscalls.h>
+#include <asm-generic/mman-common.h>
+#include <asm-generic/syscalls.h>
+#include <asm/syscall.h>
+
+#undef __SYSCALL
+#define __SYSCALL(nr, call) [nr] = (call),
+
+asmlinkage long compat_sys_rt_sigreturn(void);
+
+void * const compat_sys_call_table[__NR_syscalls] = {
+ [0 ... __NR_syscalls - 1] = sys_ni_syscall,
+#include <asm/unistd.h>
+};
diff --git a/arch/riscv/kernel/sys_riscv.c b/arch/riscv/kernel/sys_riscv.c
index 12f8a7fce78b..9c0194f176fc 100644
--- a/arch/riscv/kernel/sys_riscv.c
+++ b/arch/riscv/kernel/sys_riscv.c
@@ -33,7 +33,9 @@ SYSCALL_DEFINE6(mmap, unsigned long, addr, unsigned long, len,
{
return riscv_sys_mmap(addr, len, prot, flags, fd, offset, 0);
}
-#else
+#endif
+
+#if defined(CONFIG_32BIT) || defined(CONFIG_COMPAT)
SYSCALL_DEFINE6(mmap2, unsigned long, addr, unsigned long, len,
unsigned long, prot, unsigned long, flags,
unsigned long, fd, off_t, offset)
@@ -44,7 +46,7 @@ SYSCALL_DEFINE6(mmap2, unsigned long, addr, unsigned long, len,
*/
return riscv_sys_mmap(addr, len, prot, flags, fd, offset, 12);
}
-#endif /* !CONFIG_64BIT */
+#endif
/*
* Allows the instruction cache to be flushed from userspace. Despite RISC-V
diff --git a/fs/open.c b/fs/open.c
index 1315253e0247..0573eebb68a6 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -224,6 +224,21 @@ SYSCALL_DEFINE2(ftruncate64, unsigned int, fd, loff_t, length)
}
#endif /* BITS_PER_LONG == 32 */
+#if defined(CONFIG_COMPAT) && defined(__ARCH_WANT_COMPAT_TRUNCATE64)
+COMPAT_SYSCALL_DEFINE3(truncate64, const char __user *, pathname,
+ compat_arg_u64_dual(length))
+{
+ return ksys_truncate(pathname, compat_arg_u64_glue(length));
+}
+#endif
+
+#if defined(CONFIG_COMPAT) && defined(__ARCH_WANT_COMPAT_FTRUNCATE64)
+COMPAT_SYSCALL_DEFINE3(ftruncate64, unsigned int, fd,
+ compat_arg_u64_dual(length))
+{
+ return ksys_ftruncate(fd, compat_arg_u64_glue(length));
+}
+#endif
int vfs_fallocate(struct file *file, int mode, loff_t offset, loff_t len)
{
@@ -339,6 +354,15 @@ SYSCALL_DEFINE4(fallocate, int, fd, int, mode, loff_t, offset, loff_t, len)
return ksys_fallocate(fd, mode, offset, len);
}
+#if defined(CONFIG_COMPAT) && defined(__ARCH_WANT_COMPAT_FALLOCATE)
+COMPAT_SYSCALL_DEFINE6(fallocate, int, fd, int, mode, compat_arg_u64_dual(offset),
+ compat_arg_u64_dual(len))
+{
+ return ksys_fallocate(fd, mode, compat_arg_u64_glue(offset),
+ compat_arg_u64_glue(len));
+}
+#endif
+
/*
* access() needs to use the real uid/gid, not the effective uid/gid.
* We do this by temporarily clearing all FS-related capabilities and
diff --git a/fs/read_write.c b/fs/read_write.c
index e643aec2b0ef..b1b1cdfee9d3 100644
--- a/fs/read_write.c
+++ b/fs/read_write.c
@@ -682,6 +682,14 @@ SYSCALL_DEFINE4(pread64, unsigned int, fd, char __user *, buf,
return ksys_pread64(fd, buf, count, pos);
}
+#if defined(CONFIG_COMPAT) && defined(__ARCH_WANT_COMPAT_PREAD64)
+COMPAT_SYSCALL_DEFINE5(pread64, unsigned int, fd, char __user *, buf,
+ size_t, count, compat_arg_u64_dual(pos))
+{
+ return ksys_pread64(fd, buf, count, compat_arg_u64_glue(pos));
+}
+#endif
+
ssize_t ksys_pwrite64(unsigned int fd, const char __user *buf,
size_t count, loff_t pos)
{
@@ -708,6 +716,14 @@ SYSCALL_DEFINE4(pwrite64, unsigned int, fd, const char __user *, buf,
return ksys_pwrite64(fd, buf, count, pos);
}
+#if defined(CONFIG_COMPAT) && defined(__ARCH_WANT_COMPAT_PWRITE64)
+COMPAT_SYSCALL_DEFINE5(pwrite64, unsigned int, fd, const char __user *, buf,
+ size_t, count, compat_arg_u64_dual(pos))
+{
+ return ksys_pwrite64(fd, buf, count, compat_arg_u64_glue(pos));
+}
+#endif
+
static ssize_t do_iter_readv_writev(struct file *filp, struct iov_iter *iter,
loff_t *ppos, int type, rwf_t flags)
{
diff --git a/fs/sync.c b/fs/sync.c
index c7690016453e..dc725914e1ed 100644
--- a/fs/sync.c
+++ b/fs/sync.c
@@ -373,6 +373,15 @@ SYSCALL_DEFINE4(sync_file_range, int, fd, loff_t, offset, loff_t, nbytes,
return ksys_sync_file_range(fd, offset, nbytes, flags);
}
+#if defined(CONFIG_COMPAT) && defined(__ARCH_WANT_COMPAT_SYNC_FILE_RANGE)
+COMPAT_SYSCALL_DEFINE6(sync_file_range, int, fd, compat_arg_u64_dual(offset),
+ compat_arg_u64_dual(nbytes), unsigned int, flags)
+{
+ return ksys_sync_file_range(fd, compat_arg_u64_glue(offset),
+ compat_arg_u64_glue(nbytes), flags);
+}
+#endif
+
/* It would be nice if people remember that not all the world's an i386
when they introduce new system calls */
SYSCALL_DEFINE4(sync_file_range2, int, fd, unsigned int, flags,
diff --git a/include/asm-generic/compat.h b/include/asm-generic/compat.h
index 11653d6846cc..d06308a2a7a8 100644
--- a/include/asm-generic/compat.h
+++ b/include/asm-generic/compat.h
@@ -14,6 +14,13 @@
#define COMPAT_OFF_T_MAX 0x7fffffff
#endif
+#if !defined(compat_arg_u64) && !defined(CONFIG_CPU_BIG_ENDIAN)
+#define compat_arg_u64(name) u32 name##_lo, u32 name##_hi
+#define compat_arg_u64_dual(name) u32, name##_lo, u32, name##_hi
+#define compat_arg_u64_glue(name) (((u64)name##_lo & 0xffffffffUL) | \
+ ((u64)name##_hi << 32))
+#endif
+
/* These types are common across all compat ABIs */
typedef u32 compat_size_t;
typedef s32 compat_ssize_t;
diff --git a/include/linux/compat.h b/include/linux/compat.h
index a0481fe6c5d5..ce6cd9b30d27 100644
--- a/include/linux/compat.h
+++ b/include/linux/compat.h
@@ -926,6 +926,43 @@ asmlinkage long compat_sys_sigaction(int sig,
/* obsolete: net/socket.c */
asmlinkage long compat_sys_socketcall(int call, u32 __user *args);
+#ifdef __ARCH_WANT_COMPAT_TRUNCATE64
+asmlinkage long compat_sys_truncate64(const char __user *pathname, compat_arg_u64(len));
+#endif
+
+#ifdef __ARCH_WANT_COMPAT_FTRUNCATE64
+asmlinkage long compat_sys_ftruncate64(unsigned int fd, compat_arg_u64(len));
+#endif
+
+#ifdef __ARCH_WANT_COMPAT_FALLOCATE
+asmlinkage long compat_sys_fallocate(int fd, int mode, compat_arg_u64(offset),
+ compat_arg_u64(len));
+#endif
+
+#ifdef __ARCH_WANT_COMPAT_PREAD64
+asmlinkage long compat_sys_pread64(unsigned int fd, char __user *buf, size_t count,
+ compat_arg_u64(pos));
+#endif
+
+#ifdef __ARCH_WANT_COMPAT_PWRITE64
+asmlinkage long compat_sys_pwrite64(unsigned int fd, const char __user *buf, size_t count,
+ compat_arg_u64(pos));
+#endif
+
+#ifdef __ARCH_WANT_COMPAT_SYNC_FILE_RANGE
+asmlinkage long compat_sys_sync_file_range(int fd, compat_arg_u64(pos),
+ compat_arg_u64(nbytes), unsigned int flags);
+#endif
+
+#ifdef __ARCH_WANT_COMPAT_FADVISE64_64
+asmlinkage long compat_sys_fadvise64_64(int fd, compat_arg_u64(pos),
+ compat_arg_u64(len), int advice);
+#endif
+
+#ifdef __ARCH_WANT_COMPAT_READAHEAD
+asmlinkage long compat_sys_readahead(int fd, compat_arg_u64(offset), size_t count);
+#endif
+
#endif /* CONFIG_ARCH_HAS_SYSCALL_WRAPPER */
/**
diff --git a/mm/fadvise.c b/mm/fadvise.c
index 338f16022012..c76ee665355a 100644
--- a/mm/fadvise.c
+++ b/mm/fadvise.c
@@ -214,5 +214,16 @@ SYSCALL_DEFINE4(fadvise64, int, fd, loff_t, offset, size_t, len, int, advice)
return ksys_fadvise64_64(fd, offset, len, advice);
}
+#endif
+
+#if defined(CONFIG_COMPAT) && defined(__ARCH_WANT_COMPAT_FADVISE64_64)
+
+COMPAT_SYSCALL_DEFINE6(fadvise64_64, int, fd, compat_arg_u64_dual(offset),
+ compat_arg_u64_dual(len), int, advice)
+{
+ return ksys_fadvise64_64(fd, compat_arg_u64_glue(offset),
+ compat_arg_u64_glue(len), advice);
+}
+
#endif
#endif
diff --git a/mm/readahead.c b/mm/readahead.c
index 8e3775829513..a9ba3bb19ad0 100644
--- a/mm/readahead.c
+++ b/mm/readahead.c
@@ -746,6 +746,13 @@ SYSCALL_DEFINE3(readahead, int, fd, loff_t, offset, size_t, count)
return ksys_readahead(fd, offset, count);
}
+#if defined(CONFIG_COMPAT) && defined(__ARCH_WANT_COMPAT_READAHEAD)
+COMPAT_SYSCALL_DEFINE4(readahead, int, fd, compat_arg_u64_dual(offset), size_t, count)
+{
+ return ksys_readahead(fd, compat_arg_u64_glue(offset), count);
+}
+#endif
+
/**
* readahead_expand - Expand a readahead request
* @ractl: The request to be expanded
--
2.25.1
_______________________________________________
linux-riscv mailing list
linux-riscv@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-riscv
WARNING: multiple messages have this Message-ID (diff)
From: guoren@kernel.org
To: guoren@kernel.org, palmer@dabbelt.com, arnd@arndb.de,
gregkh@linuxfoundation.org, hch@lst.de, nathan@kernel.org,
naresh.kamboju@linaro.org
Cc: linux-arch@vger.kernel.org, linux-s390@vger.kernel.org,
Guo Ren <guoren@linux.alibaba.com>,
heiko@sntech.de, linux-parisc@vger.kernel.org, x86@kernel.org,
linux-kernel@vger.kernel.org, linux-mips@vger.kernel.org,
sparclinux@vger.kernel.org, linux-riscv@lists.infradead.org,
linuxppc-dev@lists.ozlabs.org,
linux-arm-kernel@lists.infradead.org
Subject: [PATCH V12 11/20] riscv: compat: syscall: Add compat_sys_call_table implementation
Date: Tue, 5 Apr 2022 15:13:05 +0800 [thread overview]
Message-ID: <20220405071314.3225832-12-guoren@kernel.org> (raw)
In-Reply-To: <20220405071314.3225832-1-guoren@kernel.org>
From: Guo Ren <guoren@linux.alibaba.com>
Implement compat sys_call_table and some system call functions:
truncate64, ftruncate64, fallocate, pread64, pwrite64,
sync_file_range, readahead, fadvise64_64 which need argument
translation.
Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
Signed-off-by: Guo Ren <guoren@kernel.org>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
---
arch/riscv/include/asm/syscall.h | 1 +
arch/riscv/include/asm/unistd.h | 11 +++++++
arch/riscv/include/uapi/asm/unistd.h | 2 +-
arch/riscv/kernel/Makefile | 1 +
arch/riscv/kernel/compat_syscall_table.c | 19 ++++++++++++
arch/riscv/kernel/sys_riscv.c | 6 ++--
fs/open.c | 24 +++++++++++++++
fs/read_write.c | 16 ++++++++++
fs/sync.c | 9 ++++++
include/asm-generic/compat.h | 7 +++++
include/linux/compat.h | 37 ++++++++++++++++++++++++
mm/fadvise.c | 11 +++++++
mm/readahead.c | 7 +++++
13 files changed, 148 insertions(+), 3 deletions(-)
create mode 100644 arch/riscv/kernel/compat_syscall_table.c
diff --git a/arch/riscv/include/asm/syscall.h b/arch/riscv/include/asm/syscall.h
index 7ac6a0e275f2..384a63b86420 100644
--- a/arch/riscv/include/asm/syscall.h
+++ b/arch/riscv/include/asm/syscall.h
@@ -16,6 +16,7 @@
/* The array of function pointers for syscalls. */
extern void * const sys_call_table[];
+extern void * const compat_sys_call_table[];
/*
* Only the low 32 bits of orig_r0 are meaningful, so we return int.
diff --git a/arch/riscv/include/asm/unistd.h b/arch/riscv/include/asm/unistd.h
index 6c316093a1e5..5ddac412b578 100644
--- a/arch/riscv/include/asm/unistd.h
+++ b/arch/riscv/include/asm/unistd.h
@@ -11,6 +11,17 @@
#define __ARCH_WANT_SYS_CLONE
#define __ARCH_WANT_MEMFD_SECRET
+#ifdef CONFIG_COMPAT
+#define __ARCH_WANT_COMPAT_TRUNCATE64
+#define __ARCH_WANT_COMPAT_FTRUNCATE64
+#define __ARCH_WANT_COMPAT_FALLOCATE
+#define __ARCH_WANT_COMPAT_PREAD64
+#define __ARCH_WANT_COMPAT_PWRITE64
+#define __ARCH_WANT_COMPAT_SYNC_FILE_RANGE
+#define __ARCH_WANT_COMPAT_READAHEAD
+#define __ARCH_WANT_COMPAT_FADVISE64_64
+#endif
+
#include <uapi/asm/unistd.h>
#define NR_syscalls (__NR_syscalls)
diff --git a/arch/riscv/include/uapi/asm/unistd.h b/arch/riscv/include/uapi/asm/unistd.h
index 8062996c2dfd..c9e50eed14aa 100644
--- a/arch/riscv/include/uapi/asm/unistd.h
+++ b/arch/riscv/include/uapi/asm/unistd.h
@@ -15,7 +15,7 @@
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
-#ifdef __LP64__
+#if defined(__LP64__) && !defined(__SYSCALL_COMPAT)
#define __ARCH_WANT_NEW_STAT
#define __ARCH_WANT_SET_GET_RLIMIT
#endif /* __LP64__ */
diff --git a/arch/riscv/kernel/Makefile b/arch/riscv/kernel/Makefile
index 87adbe47bc15..2fa06d6572bb 100644
--- a/arch/riscv/kernel/Makefile
+++ b/arch/riscv/kernel/Makefile
@@ -69,3 +69,4 @@ obj-$(CONFIG_CRASH_DUMP) += crash_dump.o
obj-$(CONFIG_JUMP_LABEL) += jump_label.o
obj-$(CONFIG_EFI) += efi.o
+obj-$(CONFIG_COMPAT) += compat_syscall_table.o
diff --git a/arch/riscv/kernel/compat_syscall_table.c b/arch/riscv/kernel/compat_syscall_table.c
new file mode 100644
index 000000000000..651f2b009c28
--- /dev/null
+++ b/arch/riscv/kernel/compat_syscall_table.c
@@ -0,0 +1,19 @@
+// SPDX-License-Identifier: GPL-2.0-only
+
+#define __SYSCALL_COMPAT
+
+#include <linux/compat.h>
+#include <linux/syscalls.h>
+#include <asm-generic/mman-common.h>
+#include <asm-generic/syscalls.h>
+#include <asm/syscall.h>
+
+#undef __SYSCALL
+#define __SYSCALL(nr, call) [nr] = (call),
+
+asmlinkage long compat_sys_rt_sigreturn(void);
+
+void * const compat_sys_call_table[__NR_syscalls] = {
+ [0 ... __NR_syscalls - 1] = sys_ni_syscall,
+#include <asm/unistd.h>
+};
diff --git a/arch/riscv/kernel/sys_riscv.c b/arch/riscv/kernel/sys_riscv.c
index 12f8a7fce78b..9c0194f176fc 100644
--- a/arch/riscv/kernel/sys_riscv.c
+++ b/arch/riscv/kernel/sys_riscv.c
@@ -33,7 +33,9 @@ SYSCALL_DEFINE6(mmap, unsigned long, addr, unsigned long, len,
{
return riscv_sys_mmap(addr, len, prot, flags, fd, offset, 0);
}
-#else
+#endif
+
+#if defined(CONFIG_32BIT) || defined(CONFIG_COMPAT)
SYSCALL_DEFINE6(mmap2, unsigned long, addr, unsigned long, len,
unsigned long, prot, unsigned long, flags,
unsigned long, fd, off_t, offset)
@@ -44,7 +46,7 @@ SYSCALL_DEFINE6(mmap2, unsigned long, addr, unsigned long, len,
*/
return riscv_sys_mmap(addr, len, prot, flags, fd, offset, 12);
}
-#endif /* !CONFIG_64BIT */
+#endif
/*
* Allows the instruction cache to be flushed from userspace. Despite RISC-V
diff --git a/fs/open.c b/fs/open.c
index 1315253e0247..0573eebb68a6 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -224,6 +224,21 @@ SYSCALL_DEFINE2(ftruncate64, unsigned int, fd, loff_t, length)
}
#endif /* BITS_PER_LONG == 32 */
+#if defined(CONFIG_COMPAT) && defined(__ARCH_WANT_COMPAT_TRUNCATE64)
+COMPAT_SYSCALL_DEFINE3(truncate64, const char __user *, pathname,
+ compat_arg_u64_dual(length))
+{
+ return ksys_truncate(pathname, compat_arg_u64_glue(length));
+}
+#endif
+
+#if defined(CONFIG_COMPAT) && defined(__ARCH_WANT_COMPAT_FTRUNCATE64)
+COMPAT_SYSCALL_DEFINE3(ftruncate64, unsigned int, fd,
+ compat_arg_u64_dual(length))
+{
+ return ksys_ftruncate(fd, compat_arg_u64_glue(length));
+}
+#endif
int vfs_fallocate(struct file *file, int mode, loff_t offset, loff_t len)
{
@@ -339,6 +354,15 @@ SYSCALL_DEFINE4(fallocate, int, fd, int, mode, loff_t, offset, loff_t, len)
return ksys_fallocate(fd, mode, offset, len);
}
+#if defined(CONFIG_COMPAT) && defined(__ARCH_WANT_COMPAT_FALLOCATE)
+COMPAT_SYSCALL_DEFINE6(fallocate, int, fd, int, mode, compat_arg_u64_dual(offset),
+ compat_arg_u64_dual(len))
+{
+ return ksys_fallocate(fd, mode, compat_arg_u64_glue(offset),
+ compat_arg_u64_glue(len));
+}
+#endif
+
/*
* access() needs to use the real uid/gid, not the effective uid/gid.
* We do this by temporarily clearing all FS-related capabilities and
diff --git a/fs/read_write.c b/fs/read_write.c
index e643aec2b0ef..b1b1cdfee9d3 100644
--- a/fs/read_write.c
+++ b/fs/read_write.c
@@ -682,6 +682,14 @@ SYSCALL_DEFINE4(pread64, unsigned int, fd, char __user *, buf,
return ksys_pread64(fd, buf, count, pos);
}
+#if defined(CONFIG_COMPAT) && defined(__ARCH_WANT_COMPAT_PREAD64)
+COMPAT_SYSCALL_DEFINE5(pread64, unsigned int, fd, char __user *, buf,
+ size_t, count, compat_arg_u64_dual(pos))
+{
+ return ksys_pread64(fd, buf, count, compat_arg_u64_glue(pos));
+}
+#endif
+
ssize_t ksys_pwrite64(unsigned int fd, const char __user *buf,
size_t count, loff_t pos)
{
@@ -708,6 +716,14 @@ SYSCALL_DEFINE4(pwrite64, unsigned int, fd, const char __user *, buf,
return ksys_pwrite64(fd, buf, count, pos);
}
+#if defined(CONFIG_COMPAT) && defined(__ARCH_WANT_COMPAT_PWRITE64)
+COMPAT_SYSCALL_DEFINE5(pwrite64, unsigned int, fd, const char __user *, buf,
+ size_t, count, compat_arg_u64_dual(pos))
+{
+ return ksys_pwrite64(fd, buf, count, compat_arg_u64_glue(pos));
+}
+#endif
+
static ssize_t do_iter_readv_writev(struct file *filp, struct iov_iter *iter,
loff_t *ppos, int type, rwf_t flags)
{
diff --git a/fs/sync.c b/fs/sync.c
index c7690016453e..dc725914e1ed 100644
--- a/fs/sync.c
+++ b/fs/sync.c
@@ -373,6 +373,15 @@ SYSCALL_DEFINE4(sync_file_range, int, fd, loff_t, offset, loff_t, nbytes,
return ksys_sync_file_range(fd, offset, nbytes, flags);
}
+#if defined(CONFIG_COMPAT) && defined(__ARCH_WANT_COMPAT_SYNC_FILE_RANGE)
+COMPAT_SYSCALL_DEFINE6(sync_file_range, int, fd, compat_arg_u64_dual(offset),
+ compat_arg_u64_dual(nbytes), unsigned int, flags)
+{
+ return ksys_sync_file_range(fd, compat_arg_u64_glue(offset),
+ compat_arg_u64_glue(nbytes), flags);
+}
+#endif
+
/* It would be nice if people remember that not all the world's an i386
when they introduce new system calls */
SYSCALL_DEFINE4(sync_file_range2, int, fd, unsigned int, flags,
diff --git a/include/asm-generic/compat.h b/include/asm-generic/compat.h
index 11653d6846cc..d06308a2a7a8 100644
--- a/include/asm-generic/compat.h
+++ b/include/asm-generic/compat.h
@@ -14,6 +14,13 @@
#define COMPAT_OFF_T_MAX 0x7fffffff
#endif
+#if !defined(compat_arg_u64) && !defined(CONFIG_CPU_BIG_ENDIAN)
+#define compat_arg_u64(name) u32 name##_lo, u32 name##_hi
+#define compat_arg_u64_dual(name) u32, name##_lo, u32, name##_hi
+#define compat_arg_u64_glue(name) (((u64)name##_lo & 0xffffffffUL) | \
+ ((u64)name##_hi << 32))
+#endif
+
/* These types are common across all compat ABIs */
typedef u32 compat_size_t;
typedef s32 compat_ssize_t;
diff --git a/include/linux/compat.h b/include/linux/compat.h
index a0481fe6c5d5..ce6cd9b30d27 100644
--- a/include/linux/compat.h
+++ b/include/linux/compat.h
@@ -926,6 +926,43 @@ asmlinkage long compat_sys_sigaction(int sig,
/* obsolete: net/socket.c */
asmlinkage long compat_sys_socketcall(int call, u32 __user *args);
+#ifdef __ARCH_WANT_COMPAT_TRUNCATE64
+asmlinkage long compat_sys_truncate64(const char __user *pathname, compat_arg_u64(len));
+#endif
+
+#ifdef __ARCH_WANT_COMPAT_FTRUNCATE64
+asmlinkage long compat_sys_ftruncate64(unsigned int fd, compat_arg_u64(len));
+#endif
+
+#ifdef __ARCH_WANT_COMPAT_FALLOCATE
+asmlinkage long compat_sys_fallocate(int fd, int mode, compat_arg_u64(offset),
+ compat_arg_u64(len));
+#endif
+
+#ifdef __ARCH_WANT_COMPAT_PREAD64
+asmlinkage long compat_sys_pread64(unsigned int fd, char __user *buf, size_t count,
+ compat_arg_u64(pos));
+#endif
+
+#ifdef __ARCH_WANT_COMPAT_PWRITE64
+asmlinkage long compat_sys_pwrite64(unsigned int fd, const char __user *buf, size_t count,
+ compat_arg_u64(pos));
+#endif
+
+#ifdef __ARCH_WANT_COMPAT_SYNC_FILE_RANGE
+asmlinkage long compat_sys_sync_file_range(int fd, compat_arg_u64(pos),
+ compat_arg_u64(nbytes), unsigned int flags);
+#endif
+
+#ifdef __ARCH_WANT_COMPAT_FADVISE64_64
+asmlinkage long compat_sys_fadvise64_64(int fd, compat_arg_u64(pos),
+ compat_arg_u64(len), int advice);
+#endif
+
+#ifdef __ARCH_WANT_COMPAT_READAHEAD
+asmlinkage long compat_sys_readahead(int fd, compat_arg_u64(offset), size_t count);
+#endif
+
#endif /* CONFIG_ARCH_HAS_SYSCALL_WRAPPER */
/**
diff --git a/mm/fadvise.c b/mm/fadvise.c
index 338f16022012..c76ee665355a 100644
--- a/mm/fadvise.c
+++ b/mm/fadvise.c
@@ -214,5 +214,16 @@ SYSCALL_DEFINE4(fadvise64, int, fd, loff_t, offset, size_t, len, int, advice)
return ksys_fadvise64_64(fd, offset, len, advice);
}
+#endif
+
+#if defined(CONFIG_COMPAT) && defined(__ARCH_WANT_COMPAT_FADVISE64_64)
+
+COMPAT_SYSCALL_DEFINE6(fadvise64_64, int, fd, compat_arg_u64_dual(offset),
+ compat_arg_u64_dual(len), int, advice)
+{
+ return ksys_fadvise64_64(fd, compat_arg_u64_glue(offset),
+ compat_arg_u64_glue(len), advice);
+}
+
#endif
#endif
diff --git a/mm/readahead.c b/mm/readahead.c
index 8e3775829513..a9ba3bb19ad0 100644
--- a/mm/readahead.c
+++ b/mm/readahead.c
@@ -746,6 +746,13 @@ SYSCALL_DEFINE3(readahead, int, fd, loff_t, offset, size_t, count)
return ksys_readahead(fd, offset, count);
}
+#if defined(CONFIG_COMPAT) && defined(__ARCH_WANT_COMPAT_READAHEAD)
+COMPAT_SYSCALL_DEFINE4(readahead, int, fd, compat_arg_u64_dual(offset), size_t, count)
+{
+ return ksys_readahead(fd, compat_arg_u64_glue(offset), count);
+}
+#endif
+
/**
* readahead_expand - Expand a readahead request
* @ractl: The request to be expanded
--
2.25.1
WARNING: multiple messages have this Message-ID (diff)
From: guoren@kernel.org
To: guoren@kernel.org, palmer@dabbelt.com, arnd@arndb.de,
gregkh@linuxfoundation.org, hch@lst.de, nathan@kernel.org,
naresh.kamboju@linaro.org
Cc: linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org,
sparclinux@vger.kernel.org, linuxppc-dev@lists.ozlabs.org,
linux-parisc@vger.kernel.org, linux-mips@vger.kernel.org,
linux-arm-kernel@lists.infradead.org, x86@kernel.org,
heiko@sntech.de, Guo Ren <guoren@linux.alibaba.com>
Subject: [PATCH V12 11/20] riscv: compat: syscall: Add compat_sys_call_table implementation
Date: Tue, 5 Apr 2022 15:13:05 +0800 [thread overview]
Message-ID: <20220405071314.3225832-12-guoren@kernel.org> (raw)
In-Reply-To: <20220405071314.3225832-1-guoren@kernel.org>
From: Guo Ren <guoren@linux.alibaba.com>
Implement compat sys_call_table and some system call functions:
truncate64, ftruncate64, fallocate, pread64, pwrite64,
sync_file_range, readahead, fadvise64_64 which need argument
translation.
Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
Signed-off-by: Guo Ren <guoren@kernel.org>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
---
arch/riscv/include/asm/syscall.h | 1 +
arch/riscv/include/asm/unistd.h | 11 +++++++
arch/riscv/include/uapi/asm/unistd.h | 2 +-
arch/riscv/kernel/Makefile | 1 +
arch/riscv/kernel/compat_syscall_table.c | 19 ++++++++++++
arch/riscv/kernel/sys_riscv.c | 6 ++--
fs/open.c | 24 +++++++++++++++
fs/read_write.c | 16 ++++++++++
fs/sync.c | 9 ++++++
include/asm-generic/compat.h | 7 +++++
include/linux/compat.h | 37 ++++++++++++++++++++++++
mm/fadvise.c | 11 +++++++
mm/readahead.c | 7 +++++
13 files changed, 148 insertions(+), 3 deletions(-)
create mode 100644 arch/riscv/kernel/compat_syscall_table.c
diff --git a/arch/riscv/include/asm/syscall.h b/arch/riscv/include/asm/syscall.h
index 7ac6a0e275f2..384a63b86420 100644
--- a/arch/riscv/include/asm/syscall.h
+++ b/arch/riscv/include/asm/syscall.h
@@ -16,6 +16,7 @@
/* The array of function pointers for syscalls. */
extern void * const sys_call_table[];
+extern void * const compat_sys_call_table[];
/*
* Only the low 32 bits of orig_r0 are meaningful, so we return int.
diff --git a/arch/riscv/include/asm/unistd.h b/arch/riscv/include/asm/unistd.h
index 6c316093a1e5..5ddac412b578 100644
--- a/arch/riscv/include/asm/unistd.h
+++ b/arch/riscv/include/asm/unistd.h
@@ -11,6 +11,17 @@
#define __ARCH_WANT_SYS_CLONE
#define __ARCH_WANT_MEMFD_SECRET
+#ifdef CONFIG_COMPAT
+#define __ARCH_WANT_COMPAT_TRUNCATE64
+#define __ARCH_WANT_COMPAT_FTRUNCATE64
+#define __ARCH_WANT_COMPAT_FALLOCATE
+#define __ARCH_WANT_COMPAT_PREAD64
+#define __ARCH_WANT_COMPAT_PWRITE64
+#define __ARCH_WANT_COMPAT_SYNC_FILE_RANGE
+#define __ARCH_WANT_COMPAT_READAHEAD
+#define __ARCH_WANT_COMPAT_FADVISE64_64
+#endif
+
#include <uapi/asm/unistd.h>
#define NR_syscalls (__NR_syscalls)
diff --git a/arch/riscv/include/uapi/asm/unistd.h b/arch/riscv/include/uapi/asm/unistd.h
index 8062996c2dfd..c9e50eed14aa 100644
--- a/arch/riscv/include/uapi/asm/unistd.h
+++ b/arch/riscv/include/uapi/asm/unistd.h
@@ -15,7 +15,7 @@
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
-#ifdef __LP64__
+#if defined(__LP64__) && !defined(__SYSCALL_COMPAT)
#define __ARCH_WANT_NEW_STAT
#define __ARCH_WANT_SET_GET_RLIMIT
#endif /* __LP64__ */
diff --git a/arch/riscv/kernel/Makefile b/arch/riscv/kernel/Makefile
index 87adbe47bc15..2fa06d6572bb 100644
--- a/arch/riscv/kernel/Makefile
+++ b/arch/riscv/kernel/Makefile
@@ -69,3 +69,4 @@ obj-$(CONFIG_CRASH_DUMP) += crash_dump.o
obj-$(CONFIG_JUMP_LABEL) += jump_label.o
obj-$(CONFIG_EFI) += efi.o
+obj-$(CONFIG_COMPAT) += compat_syscall_table.o
diff --git a/arch/riscv/kernel/compat_syscall_table.c b/arch/riscv/kernel/compat_syscall_table.c
new file mode 100644
index 000000000000..651f2b009c28
--- /dev/null
+++ b/arch/riscv/kernel/compat_syscall_table.c
@@ -0,0 +1,19 @@
+// SPDX-License-Identifier: GPL-2.0-only
+
+#define __SYSCALL_COMPAT
+
+#include <linux/compat.h>
+#include <linux/syscalls.h>
+#include <asm-generic/mman-common.h>
+#include <asm-generic/syscalls.h>
+#include <asm/syscall.h>
+
+#undef __SYSCALL
+#define __SYSCALL(nr, call) [nr] = (call),
+
+asmlinkage long compat_sys_rt_sigreturn(void);
+
+void * const compat_sys_call_table[__NR_syscalls] = {
+ [0 ... __NR_syscalls - 1] = sys_ni_syscall,
+#include <asm/unistd.h>
+};
diff --git a/arch/riscv/kernel/sys_riscv.c b/arch/riscv/kernel/sys_riscv.c
index 12f8a7fce78b..9c0194f176fc 100644
--- a/arch/riscv/kernel/sys_riscv.c
+++ b/arch/riscv/kernel/sys_riscv.c
@@ -33,7 +33,9 @@ SYSCALL_DEFINE6(mmap, unsigned long, addr, unsigned long, len,
{
return riscv_sys_mmap(addr, len, prot, flags, fd, offset, 0);
}
-#else
+#endif
+
+#if defined(CONFIG_32BIT) || defined(CONFIG_COMPAT)
SYSCALL_DEFINE6(mmap2, unsigned long, addr, unsigned long, len,
unsigned long, prot, unsigned long, flags,
unsigned long, fd, off_t, offset)
@@ -44,7 +46,7 @@ SYSCALL_DEFINE6(mmap2, unsigned long, addr, unsigned long, len,
*/
return riscv_sys_mmap(addr, len, prot, flags, fd, offset, 12);
}
-#endif /* !CONFIG_64BIT */
+#endif
/*
* Allows the instruction cache to be flushed from userspace. Despite RISC-V
diff --git a/fs/open.c b/fs/open.c
index 1315253e0247..0573eebb68a6 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -224,6 +224,21 @@ SYSCALL_DEFINE2(ftruncate64, unsigned int, fd, loff_t, length)
}
#endif /* BITS_PER_LONG == 32 */
+#if defined(CONFIG_COMPAT) && defined(__ARCH_WANT_COMPAT_TRUNCATE64)
+COMPAT_SYSCALL_DEFINE3(truncate64, const char __user *, pathname,
+ compat_arg_u64_dual(length))
+{
+ return ksys_truncate(pathname, compat_arg_u64_glue(length));
+}
+#endif
+
+#if defined(CONFIG_COMPAT) && defined(__ARCH_WANT_COMPAT_FTRUNCATE64)
+COMPAT_SYSCALL_DEFINE3(ftruncate64, unsigned int, fd,
+ compat_arg_u64_dual(length))
+{
+ return ksys_ftruncate(fd, compat_arg_u64_glue(length));
+}
+#endif
int vfs_fallocate(struct file *file, int mode, loff_t offset, loff_t len)
{
@@ -339,6 +354,15 @@ SYSCALL_DEFINE4(fallocate, int, fd, int, mode, loff_t, offset, loff_t, len)
return ksys_fallocate(fd, mode, offset, len);
}
+#if defined(CONFIG_COMPAT) && defined(__ARCH_WANT_COMPAT_FALLOCATE)
+COMPAT_SYSCALL_DEFINE6(fallocate, int, fd, int, mode, compat_arg_u64_dual(offset),
+ compat_arg_u64_dual(len))
+{
+ return ksys_fallocate(fd, mode, compat_arg_u64_glue(offset),
+ compat_arg_u64_glue(len));
+}
+#endif
+
/*
* access() needs to use the real uid/gid, not the effective uid/gid.
* We do this by temporarily clearing all FS-related capabilities and
diff --git a/fs/read_write.c b/fs/read_write.c
index e643aec2b0ef..b1b1cdfee9d3 100644
--- a/fs/read_write.c
+++ b/fs/read_write.c
@@ -682,6 +682,14 @@ SYSCALL_DEFINE4(pread64, unsigned int, fd, char __user *, buf,
return ksys_pread64(fd, buf, count, pos);
}
+#if defined(CONFIG_COMPAT) && defined(__ARCH_WANT_COMPAT_PREAD64)
+COMPAT_SYSCALL_DEFINE5(pread64, unsigned int, fd, char __user *, buf,
+ size_t, count, compat_arg_u64_dual(pos))
+{
+ return ksys_pread64(fd, buf, count, compat_arg_u64_glue(pos));
+}
+#endif
+
ssize_t ksys_pwrite64(unsigned int fd, const char __user *buf,
size_t count, loff_t pos)
{
@@ -708,6 +716,14 @@ SYSCALL_DEFINE4(pwrite64, unsigned int, fd, const char __user *, buf,
return ksys_pwrite64(fd, buf, count, pos);
}
+#if defined(CONFIG_COMPAT) && defined(__ARCH_WANT_COMPAT_PWRITE64)
+COMPAT_SYSCALL_DEFINE5(pwrite64, unsigned int, fd, const char __user *, buf,
+ size_t, count, compat_arg_u64_dual(pos))
+{
+ return ksys_pwrite64(fd, buf, count, compat_arg_u64_glue(pos));
+}
+#endif
+
static ssize_t do_iter_readv_writev(struct file *filp, struct iov_iter *iter,
loff_t *ppos, int type, rwf_t flags)
{
diff --git a/fs/sync.c b/fs/sync.c
index c7690016453e..dc725914e1ed 100644
--- a/fs/sync.c
+++ b/fs/sync.c
@@ -373,6 +373,15 @@ SYSCALL_DEFINE4(sync_file_range, int, fd, loff_t, offset, loff_t, nbytes,
return ksys_sync_file_range(fd, offset, nbytes, flags);
}
+#if defined(CONFIG_COMPAT) && defined(__ARCH_WANT_COMPAT_SYNC_FILE_RANGE)
+COMPAT_SYSCALL_DEFINE6(sync_file_range, int, fd, compat_arg_u64_dual(offset),
+ compat_arg_u64_dual(nbytes), unsigned int, flags)
+{
+ return ksys_sync_file_range(fd, compat_arg_u64_glue(offset),
+ compat_arg_u64_glue(nbytes), flags);
+}
+#endif
+
/* It would be nice if people remember that not all the world's an i386
when they introduce new system calls */
SYSCALL_DEFINE4(sync_file_range2, int, fd, unsigned int, flags,
diff --git a/include/asm-generic/compat.h b/include/asm-generic/compat.h
index 11653d6846cc..d06308a2a7a8 100644
--- a/include/asm-generic/compat.h
+++ b/include/asm-generic/compat.h
@@ -14,6 +14,13 @@
#define COMPAT_OFF_T_MAX 0x7fffffff
#endif
+#if !defined(compat_arg_u64) && !defined(CONFIG_CPU_BIG_ENDIAN)
+#define compat_arg_u64(name) u32 name##_lo, u32 name##_hi
+#define compat_arg_u64_dual(name) u32, name##_lo, u32, name##_hi
+#define compat_arg_u64_glue(name) (((u64)name##_lo & 0xffffffffUL) | \
+ ((u64)name##_hi << 32))
+#endif
+
/* These types are common across all compat ABIs */
typedef u32 compat_size_t;
typedef s32 compat_ssize_t;
diff --git a/include/linux/compat.h b/include/linux/compat.h
index a0481fe6c5d5..ce6cd9b30d27 100644
--- a/include/linux/compat.h
+++ b/include/linux/compat.h
@@ -926,6 +926,43 @@ asmlinkage long compat_sys_sigaction(int sig,
/* obsolete: net/socket.c */
asmlinkage long compat_sys_socketcall(int call, u32 __user *args);
+#ifdef __ARCH_WANT_COMPAT_TRUNCATE64
+asmlinkage long compat_sys_truncate64(const char __user *pathname, compat_arg_u64(len));
+#endif
+
+#ifdef __ARCH_WANT_COMPAT_FTRUNCATE64
+asmlinkage long compat_sys_ftruncate64(unsigned int fd, compat_arg_u64(len));
+#endif
+
+#ifdef __ARCH_WANT_COMPAT_FALLOCATE
+asmlinkage long compat_sys_fallocate(int fd, int mode, compat_arg_u64(offset),
+ compat_arg_u64(len));
+#endif
+
+#ifdef __ARCH_WANT_COMPAT_PREAD64
+asmlinkage long compat_sys_pread64(unsigned int fd, char __user *buf, size_t count,
+ compat_arg_u64(pos));
+#endif
+
+#ifdef __ARCH_WANT_COMPAT_PWRITE64
+asmlinkage long compat_sys_pwrite64(unsigned int fd, const char __user *buf, size_t count,
+ compat_arg_u64(pos));
+#endif
+
+#ifdef __ARCH_WANT_COMPAT_SYNC_FILE_RANGE
+asmlinkage long compat_sys_sync_file_range(int fd, compat_arg_u64(pos),
+ compat_arg_u64(nbytes), unsigned int flags);
+#endif
+
+#ifdef __ARCH_WANT_COMPAT_FADVISE64_64
+asmlinkage long compat_sys_fadvise64_64(int fd, compat_arg_u64(pos),
+ compat_arg_u64(len), int advice);
+#endif
+
+#ifdef __ARCH_WANT_COMPAT_READAHEAD
+asmlinkage long compat_sys_readahead(int fd, compat_arg_u64(offset), size_t count);
+#endif
+
#endif /* CONFIG_ARCH_HAS_SYSCALL_WRAPPER */
/**
diff --git a/mm/fadvise.c b/mm/fadvise.c
index 338f16022012..c76ee665355a 100644
--- a/mm/fadvise.c
+++ b/mm/fadvise.c
@@ -214,5 +214,16 @@ SYSCALL_DEFINE4(fadvise64, int, fd, loff_t, offset, size_t, len, int, advice)
return ksys_fadvise64_64(fd, offset, len, advice);
}
+#endif
+
+#if defined(CONFIG_COMPAT) && defined(__ARCH_WANT_COMPAT_FADVISE64_64)
+
+COMPAT_SYSCALL_DEFINE6(fadvise64_64, int, fd, compat_arg_u64_dual(offset),
+ compat_arg_u64_dual(len), int, advice)
+{
+ return ksys_fadvise64_64(fd, compat_arg_u64_glue(offset),
+ compat_arg_u64_glue(len), advice);
+}
+
#endif
#endif
diff --git a/mm/readahead.c b/mm/readahead.c
index 8e3775829513..a9ba3bb19ad0 100644
--- a/mm/readahead.c
+++ b/mm/readahead.c
@@ -746,6 +746,13 @@ SYSCALL_DEFINE3(readahead, int, fd, loff_t, offset, size_t, count)
return ksys_readahead(fd, offset, count);
}
+#if defined(CONFIG_COMPAT) && defined(__ARCH_WANT_COMPAT_READAHEAD)
+COMPAT_SYSCALL_DEFINE4(readahead, int, fd, compat_arg_u64_dual(offset), size_t, count)
+{
+ return ksys_readahead(fd, compat_arg_u64_glue(offset), count);
+}
+#endif
+
/**
* readahead_expand - Expand a readahead request
* @ractl: The request to be expanded
--
2.25.1
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next prev parent reply other threads:[~2022-04-05 7:15 UTC|newest]
Thread overview: 116+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-04-05 7:12 [PATCH V12 00/20] riscv: Add COMPAT mode support for 64BIT guoren
2022-04-05 7:12 ` guoren
2022-04-05 7:12 ` guoren
2022-04-05 7:12 ` guoren
2022-04-05 7:12 ` [PATCH V12 01/20] uapi: simplify __ARCH_FLOCK{,64}_PAD a little guoren
2022-04-05 7:12 ` guoren
2022-04-05 7:12 ` guoren
2022-04-05 7:12 ` guoren
2022-07-15 3:13 ` Florian Fainelli
2022-07-15 3:13 ` Florian Fainelli
2022-07-15 3:13 ` Florian Fainelli
2022-07-15 3:13 ` Florian Fainelli
2022-04-05 7:12 ` [PATCH V12 02/20] uapi: always define F_GETLK64/F_SETLK64/F_SETLKW64 in fcntl.h guoren
2022-04-05 7:12 ` guoren
2022-04-05 7:12 ` guoren
2022-04-05 7:12 ` guoren
2022-06-08 9:41 ` Eugene Syromiatnikov
2022-06-08 9:41 ` Eugene Syromiatnikov
2022-06-08 9:41 ` Eugene Syromiatnikov
2022-06-08 9:41 ` Eugene Syromiatnikov
2022-06-13 1:15 ` Guo Ren
2022-06-13 1:15 ` Guo Ren
2022-06-13 1:15 ` Guo Ren
2022-06-13 1:15 ` Guo Ren
2022-04-05 7:12 ` [PATCH V12 03/20] compat: consolidate the compat_flock{, 64} definition guoren
2022-04-05 7:12 ` guoren
2022-04-05 7:12 ` guoren
2022-04-05 7:12 ` [PATCH V12 03/20] compat: consolidate the compat_flock{,64} definition guoren
2022-04-05 7:12 ` [PATCH V12 04/20] arch: Add SYSVIPC_COMPAT for all architectures guoren
2022-04-05 7:12 ` guoren
2022-04-05 7:12 ` guoren
2022-04-05 7:12 ` guoren
2022-04-05 7:12 ` [PATCH V12 05/20] fs: stat: compat: Add __ARCH_WANT_COMPAT_STAT guoren
2022-04-05 7:12 ` guoren
2022-04-05 7:12 ` guoren
2022-04-05 7:12 ` guoren
2022-04-05 7:13 ` [PATCH V12 06/20] asm-generic: compat: Cleanup duplicate definitions guoren
2022-04-05 7:13 ` guoren
2022-04-05 7:13 ` guoren
2022-04-05 7:13 ` guoren
2022-04-05 7:13 ` [PATCH V12 07/20] syscalls: compat: Fix the missing part for __SYSCALL_COMPAT guoren
2022-04-05 7:13 ` guoren
2022-04-05 7:13 ` guoren
2022-04-05 7:13 ` guoren
2022-04-05 7:13 ` [PATCH V12 08/20] riscv: Fixup difference with defconfig guoren
2022-04-05 7:13 ` guoren
2022-04-05 7:13 ` guoren
2022-04-05 7:13 ` guoren
2022-04-05 7:13 ` [PATCH V12 09/20] riscv: compat: Add basic compat data type implementation guoren
2022-04-05 7:13 ` guoren
2022-04-05 7:13 ` guoren
2022-04-05 7:13 ` guoren
2022-04-05 7:13 ` [PATCH V12 10/20] riscv: compat: Support TASK_SIZE for compat mode guoren
2022-04-05 7:13 ` guoren
2022-04-05 7:13 ` guoren
2022-04-05 7:13 ` guoren
2022-04-05 7:13 ` guoren [this message]
2022-04-05 7:13 ` [PATCH V12 11/20] riscv: compat: syscall: Add compat_sys_call_table implementation guoren
2022-04-05 7:13 ` guoren
2022-04-05 7:13 ` guoren
2022-04-05 7:13 ` [PATCH V12 12/20] riscv: compat: syscall: Add entry.S implementation guoren
2022-04-05 7:13 ` guoren
2022-04-05 7:13 ` guoren
2022-04-05 7:13 ` guoren
2022-04-05 7:13 ` [PATCH V12 13/20] riscv: compat: process: Add UXL_32 support in start_thread guoren
2022-04-05 7:13 ` guoren
2022-04-05 7:13 ` guoren
2022-04-05 7:13 ` guoren
2022-04-05 7:13 ` [PATCH V12 14/20] riscv: compat: Add elf.h implementation guoren
2022-04-05 7:13 ` guoren
2022-04-05 7:13 ` guoren
2022-04-05 7:13 ` guoren
2022-04-05 7:13 ` [PATCH V12 15/20] riscv: compat: Add hw capability check for elf guoren
2022-04-05 7:13 ` guoren
2022-04-05 7:13 ` guoren
2022-04-05 7:13 ` guoren
2022-04-05 7:13 ` [PATCH V12 16/20] riscv: compat: vdso: Add COMPAT_VDSO base code implementation guoren
2022-04-05 7:13 ` guoren
2022-04-05 7:13 ` guoren
2022-04-05 7:13 ` guoren
2022-04-05 7:13 ` [PATCH V12 17/20] riscv: compat: vdso: Add setup additional pages implementation guoren
2022-04-05 7:13 ` guoren
2022-04-05 7:13 ` guoren
2022-04-05 7:13 ` guoren
2022-04-05 7:13 ` [PATCH V12 18/20] riscv: compat: signal: Add rt_frame implementation guoren
2022-04-05 7:13 ` guoren
2022-04-05 7:13 ` guoren
2022-04-05 7:13 ` guoren
2022-04-05 7:13 ` [PATCH V12 19/20] riscv: compat: ptrace: Add compat_arch_ptrace implement guoren
2022-04-05 7:13 ` guoren
2022-04-05 7:13 ` guoren
2022-04-05 7:13 ` guoren
2022-04-05 7:13 ` [PATCH V12 20/20] riscv: compat: Add COMPAT Kbuild skeletal support guoren
2022-04-05 7:13 ` guoren
2022-04-05 7:13 ` guoren
2022-04-05 7:13 ` guoren
2022-04-28 12:25 ` [PATCH V12 00/20] riscv: Add COMPAT mode support for 64BIT Guo Ren
2022-04-28 12:25 ` Guo Ren
2022-04-28 12:25 ` Guo Ren
2022-04-28 12:25 ` Guo Ren
2022-04-28 18:22 ` Palmer Dabbelt
2022-04-28 18:22 ` Palmer Dabbelt
2022-04-28 18:22 ` Palmer Dabbelt
2022-04-28 18:22 ` Palmer Dabbelt
2022-04-30 5:43 ` Guo Ren
2022-04-30 5:43 ` Guo Ren
2022-04-30 5:43 ` Guo Ren
2022-04-30 5:43 ` Guo Ren
2022-05-19 17:50 ` Palmer Dabbelt
2022-05-19 17:50 ` Palmer Dabbelt
2022-05-19 17:50 ` Palmer Dabbelt
2022-05-19 17:50 ` Palmer Dabbelt
2022-05-20 18:18 ` Guo Ren
2022-05-20 18:18 ` Guo Ren
2022-05-20 18:18 ` Guo Ren
2022-05-20 18:18 ` Guo Ren
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