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convert sendfile{,64} to COMPAT_SYSCALL_DEFINE

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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2013-02-24 02:17:03 -05:00
parent 7d197ed4a6
commit 19f4fc3aee
20 changed files with 54 additions and 175 deletions
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20
arch/mips/kernel/linux32.c
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@ -226,26 +226,6 @@ SYSCALL_DEFINE1(32_personality, unsigned long, personality)
return ret;
}
SYSCALL_DEFINE4(32_sendfile, long, out_fd, long, in_fd,
compat_off_t __user *, offset, s32, count)
{
mm_segment_t old_fs = get_fs();
int ret;
off_t of;
if (offset && get_user(of, offset))
return -EFAULT;
set_fs(KERNEL_DS);
ret = sys_sendfile(out_fd, in_fd, offset ? (off_t __user *)&of : NULL, count);
set_fs(old_fs);
if (offset && put_user(of, offset))
return -EFAULT;
return ret;
}
asmlinkage ssize_t sys32_readahead(int fd, u32 pad0, u64 a2, u64 a3,
size_t count)
{

2
arch/mips/kernel/scall64-n32.S
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@ -143,7 +143,7 @@ EXPORT(sysn32_call_table)
PTR compat_sys_setitimer
PTR sys_alarm
PTR sys_getpid
PTR sys_32_sendfile
PTR compat_sys_sendfile
PTR sys_socket /* 6040 */
PTR sys_connect
PTR sys_accept

2
arch/mips/kernel/scall64-o32.S
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@ -399,7 +399,7 @@ sys_call_table:
PTR sys_capget
PTR sys_capset /* 4205 */
PTR compat_sys_sigaltstack
PTR sys_32_sendfile
PTR compat_sys_sendfile
PTR sys_ni_syscall
PTR sys_ni_syscall
PTR sys_mips_mmap2 /* 4210 */

19
arch/parisc/kernel/sys_parisc32.c
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@ -60,25 +60,6 @@ asmlinkage long sys32_unimplemented(int r26, int r25, int r24, int r23,
return -ENOSYS;
}
/* Note: it is necessary to treat out_fd and in_fd as unsigned ints, with the
* corresponding cast to a signed int to insure that the proper conversion
* (sign extension) between the register representation of a signed int (msr in
* 32-bit mode) and the register representation of a signed int (msr in 64-bit
* mode) is performed.
*/
asmlinkage long sys32_sendfile(u32 out_fd, u32 in_fd,
compat_off_t __user *offset, compat_size_t count)
{
return compat_sys_sendfile((int)out_fd, (int)in_fd, offset, count);
}
asmlinkage long sys32_sendfile64(u32 out_fd, u32 in_fd,
compat_loff_t __user *offset, compat_size_t count)
{
return sys_sendfile64((int)out_fd, (int)in_fd,
(loff_t __user *)offset, count);
}
asmlinkage long sys32_semctl(int semid, int semnum, int cmd, union semun arg)
{
union semun u;

4
arch/parisc/kernel/syscall_table.S
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@ -198,7 +198,7 @@
ENTRY_SAME(madvise)
ENTRY_SAME(clone_wrapper) /* 120 */
ENTRY_SAME(setdomainname)
ENTRY_DIFF(sendfile)
ENTRY_COMP(sendfile)
/* struct sockaddr... */
ENTRY_SAME(recvfrom)
/* struct timex contains longs */
@ -304,7 +304,7 @@
ENTRY_SAME(gettid)
ENTRY_OURS(readahead)
ENTRY_SAME(tkill)
ENTRY_DIFF(sendfile64)
ENTRY_COMP(sendfile64)
ENTRY_COMP(futex) /* 210 */
ENTRY_COMP(sched_setaffinity)
ENTRY_COMP(sched_getaffinity)

4
arch/powerpc/include/asm/systbl.h
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@ -190,7 +190,7 @@ SYSCALL_SPU(getcwd)
SYSCALL_SPU(capget)
SYSCALL_SPU(capset)
COMPAT_SYS(sigaltstack)
SYSX_SPU(sys_sendfile,compat_sys_sendfile_wrapper,sys_sendfile)
COMPAT_SYS_SPU(sendfile)
SYSCALL(ni_syscall)
SYSCALL(ni_syscall)
PPC_SYS(vfork)
@ -230,7 +230,7 @@ COMPAT_SYS_SPU(sched_setaffinity)
COMPAT_SYS_SPU(sched_getaffinity)
SYSCALL(ni_syscall)
SYSCALL(ni_syscall)
SYSX(sys_ni_syscall,compat_sys_sendfile64_wrapper,sys_sendfile64)
SYS32ONLY(sendfile64)
COMPAT_SYS_SPU(io_setup)
SYSCALL_SPU(io_destroy)
COMPAT_SYS_SPU(io_getevents)

18
arch/powerpc/kernel/sys_ppc32.c
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@ -128,24 +128,6 @@ long compat_sys_ipc(u32 call, u32 first, u32 second, u32 third, compat_uptr_t pt
}
#endif
/* Note: it is necessary to treat out_fd and in_fd as unsigned ints,
* with the corresponding cast to a signed int to insure that the
* proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
* and the register representation of a signed int (msr in 64-bit mode) is performed.
*/
asmlinkage long compat_sys_sendfile_wrapper(u32 out_fd, u32 in_fd,
compat_off_t __user *offset, u32 count)
{
return compat_sys_sendfile((int)out_fd, (int)in_fd, offset, count);
}
asmlinkage long compat_sys_sendfile64_wrapper(u32 out_fd, u32 in_fd,
compat_loff_t __user *offset, u32 count)
{
return sys_sendfile((int)out_fd, (int)in_fd,
(off_t __user *)offset, count);
}
unsigned long compat_sys_mmap2(unsigned long addr, size_t len,
unsigned long prot, unsigned long flags,
unsigned long fd, unsigned long pgoff)

42
arch/s390/kernel/compat_linux.c
View File

@ -373,48 +373,6 @@ asmlinkage compat_ssize_t sys32_readahead(int fd, u32 offhi, u32 offlo, s32 coun
return sys_readahead(fd, ((loff_t)AA(offhi) << 32) | AA(offlo), count);
}
asmlinkage long sys32_sendfile(int out_fd, int in_fd, compat_off_t __user *offset, size_t count)
{
mm_segment_t old_fs = get_fs();
int ret;
off_t of;
if (offset && get_user(of, offset))
return -EFAULT;
set_fs(KERNEL_DS);
ret = sys_sendfile(out_fd, in_fd,
offset ? (off_t __force __user *) &of : NULL, count);
set_fs(old_fs);
if (offset && put_user(of, offset))
return -EFAULT;
return ret;
}
asmlinkage long sys32_sendfile64(int out_fd, int in_fd,
compat_loff_t __user *offset, s32 count)
{
mm_segment_t old_fs = get_fs();
int ret;
loff_t lof;
if (offset && get_user(lof, offset))
return -EFAULT;
set_fs(KERNEL_DS);
ret = sys_sendfile64(out_fd, in_fd,
offset ? (loff_t __force __user *) &lof : NULL,
count);
set_fs(old_fs);
if (offset && put_user(lof, offset))
return -EFAULT;
return ret;
}
struct stat64_emu31 {
unsigned long long st_dev;
unsigned int __pad1;

4
arch/s390/kernel/compat_linux.h
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@ -106,10 +106,6 @@ long sys32_pread64(unsigned int fd, char __user *ubuf, size_t count,
long sys32_pwrite64(unsigned int fd, const char __user *ubuf,
size_t count, u32 poshi, u32 poslo);
compat_ssize_t sys32_readahead(int fd, u32 offhi, u32 offlo, s32 count);
long sys32_sendfile(int out_fd, int in_fd, compat_off_t __user *offset,
size_t count);
long sys32_sendfile64(int out_fd, int in_fd, compat_loff_t __user *offset,
s32 count);
long sys32_stat64(const char __user * filename, struct stat64_emu31 __user * statbuf);
long sys32_lstat64(const char __user * filename,
struct stat64_emu31 __user * statbuf);

14
arch/s390/kernel/compat_wrapper.S
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@ -666,13 +666,6 @@ ENTRY(sys32_capset_wrapper)
llgtr %r3,%r3 # const cap_user_data_t
jg sys_capset # branch to system call
ENTRY(sys32_sendfile_wrapper)
lgfr %r2,%r2 # int
lgfr %r3,%r3 # int
llgtr %r4,%r4 # __kernel_off_emu31_t *
llgfr %r5,%r5 # size_t
jg sys32_sendfile # branch to system call
#sys32_vfork_wrapper # done in vfork_glue
ENTRY(sys32_truncate64_wrapper)
@ -1348,13 +1341,6 @@ ENTRY(sys32_readahead_wrapper)
lgfr %r5,%r5 # s32
jg sys32_readahead # branch to system call
ENTRY(sys32_sendfile64_wrapper)
lgfr %r2,%r2 # int
lgfr %r3,%r3 # int
llgtr %r4,%r4 # compat_loff_t *
lgfr %r5,%r5 # s32
jg sys32_sendfile64 # branch to system call
ENTRY(sys_tkill_wrapper)
lgfr %r2,%r2 # pid_t
lgfr %r3,%r3 # int

4
arch/s390/kernel/syscalls.S
View File

@ -195,7 +195,7 @@ SYSCALL(sys_getcwd,sys_getcwd,sys32_getcwd_wrapper)
SYSCALL(sys_capget,sys_capget,sys32_capget_wrapper)
SYSCALL(sys_capset,sys_capset,sys32_capset_wrapper) /* 185 */
SYSCALL(sys_sigaltstack,sys_sigaltstack,compat_sys_sigaltstack)
SYSCALL(sys_sendfile,sys_sendfile64,sys32_sendfile_wrapper)
SYSCALL(sys_sendfile,sys_sendfile64,compat_sys_sendfile)
NI_SYSCALL /* streams1 */
NI_SYSCALL /* streams2 */
SYSCALL(sys_vfork,sys_vfork,sys_vfork) /* 190 */
@ -231,7 +231,7 @@ SYSCALL(sys_madvise,sys_madvise,sys32_madvise_wrapper)
SYSCALL(sys_getdents64,sys_getdents64,sys32_getdents64_wrapper) /* 220 */
SYSCALL(sys_fcntl64,sys_ni_syscall,compat_sys_fcntl64_wrapper)
SYSCALL(sys_readahead,sys_readahead,sys32_readahead_wrapper)
SYSCALL(sys_sendfile64,sys_ni_syscall,sys32_sendfile64_wrapper)
SYSCALL(sys_sendfile64,sys_ni_syscall,compat_sys_sendfile64)
SYSCALL(sys_setxattr,sys_setxattr,sys32_setxattr_wrapper)
SYSCALL(sys_lsetxattr,sys_lsetxattr,sys32_lsetxattr_wrapper) /* 225 */
SYSCALL(sys_fsetxattr,sys_fsetxattr,sys32_fsetxattr_wrapper)

1
arch/sparc/kernel/sys32.S
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@ -46,7 +46,6 @@ SIGN1(sys32_io_submit, compat_sys_io_submit, %o1)
SIGN1(sys32_mq_open, compat_sys_mq_open, %o1)
SIGN1(sys32_select, compat_sys_select, %o0)
SIGN3(sys32_futex, compat_sys_futex, %o1, %o2, %o5)
SIGN2(sys32_sendfile, compat_sys_sendfile, %o0, %o1)
SIGN1(sys32_recvfrom, compat_sys_recvfrom, %o0)
SIGN1(sys32_recvmsg, compat_sys_recvmsg, %o0)
SIGN1(sys32_sendmsg, compat_sys_sendmsg, %o0)

2
arch/sparc/kernel/systbls_64.S
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@ -25,7 +25,7 @@ sys_call_table32:
/*20*/ .word sys_getpid, sys_capget, sys_capset, sys_setuid16, sys_getuid16
/*25*/ .word sys32_vmsplice, compat_sys_ptrace, sys_alarm, compat_sys_sigaltstack, sys_pause
/*30*/ .word compat_sys_utime, sys_lchown, sys_fchown, sys_access, sys_nice
.word sys_chown, sys_sync, sys_kill, compat_sys_newstat, sys32_sendfile
.word sys_chown, sys_sync, sys_kill, compat_sys_newstat, compat_sys_sendfile
/*40*/ .word compat_sys_newlstat, sys_dup, sys_sparc_pipe, compat_sys_times, sys_getuid
.word sys_umount, sys_setgid16, sys_getgid16, sys_signal, sys_geteuid16
/*50*/ .word sys_getegid16, sys_acct, sys_nis_syscall, sys_getgid, compat_sys_ioctl

20
arch/x86/ia32/sys_ia32.c
View File

@ -194,26 +194,6 @@ asmlinkage long sys32_pwrite(unsigned int fd, const char __user *ubuf,
}
asmlinkage long sys32_sendfile(int out_fd, int in_fd,
compat_off_t __user *offset, s32 count)
{
mm_segment_t old_fs = get_fs();
int ret;
off_t of;
if (offset && get_user(of, offset))
return -EFAULT;
set_fs(KERNEL_DS);
ret = sys_sendfile(out_fd, in_fd, offset ? (off_t __user *)&of : NULL,
count);
set_fs(old_fs);
if (offset && put_user(of, offset))
return -EFAULT;
return ret;
}
/*
* Some system calls that need sign extended arguments. This could be
* done by a generic wrapper.

1
arch/x86/include/asm/sys_ia32.h
View File

@ -41,7 +41,6 @@ asmlinkage long sys32_pread(unsigned int, char __user *, u32, u32, u32);
asmlinkage long sys32_pwrite(unsigned int, const char __user *, u32, u32, u32);
asmlinkage long sys32_personality(unsigned long);
asmlinkage long sys32_sendfile(int, int, compat_off_t __user *, s32);
long sys32_kill(int, int);
long sys32_fadvise64_64(int, __u32, __u32, __u32, __u32, int);

2
arch/x86/syscalls/syscall_32.tbl
View File

@ -193,7 +193,7 @@
184 i386 capget sys_capget
185 i386 capset sys_capset
186 i386 sigaltstack sys_sigaltstack compat_sys_sigaltstack
187 i386 sendfile sys_sendfile sys32_sendfile
187 i386 sendfile sys_sendfile compat_sys_sendfile
188 i386 getpmsg
189 i386 putpmsg
190 i386 vfork sys_vfork stub32_vfork

22
fs/compat.c
View File

@ -1718,25 +1718,3 @@ COMPAT_SYSCALL_DEFINE3(open_by_handle_at, int, mountdirfd,
return do_handle_open(mountdirfd, handle, flags);
}
#endif
#ifdef __ARCH_WANT_COMPAT_SYS_SENDFILE
asmlinkage long compat_sys_sendfile(int out_fd, int in_fd,
compat_off_t __user *offset, compat_size_t count)
{
loff_t pos;
off_t off;
ssize_t ret;
if (offset) {
if (unlikely(get_user(off, offset)))
return -EFAULT;
pos = off;
ret = do_sendfile(out_fd, in_fd, &pos, count, MAX_NON_LFS);
if (unlikely(put_user(pos, offset)))
return -EFAULT;
return ret;
}
return do_sendfile(out_fd, in_fd, NULL, count, 0);
}
#endif /* __ARCH_WANT_COMPAT_SYS_SENDFILE */

44
fs/read_write.c
View File

@ -853,8 +853,8 @@ SYSCALL_DEFINE5(pwritev, unsigned long, fd, const struct iovec __user *, vec,
return ret;
}
ssize_t do_sendfile(int out_fd, int in_fd, loff_t *ppos, size_t count,
loff_t max)
static ssize_t do_sendfile(int out_fd, int in_fd, loff_t *ppos,
size_t count, loff_t max)
{
struct fd in, out;
struct inode *in_inode, *out_inode;
@ -978,3 +978,43 @@ SYSCALL_DEFINE4(sendfile64, int, out_fd, int, in_fd, loff_t __user *, offset, si
return do_sendfile(out_fd, in_fd, NULL, count, 0);
}
#ifdef CONFIG_COMPAT
COMPAT_SYSCALL_DEFINE4(sendfile, int, out_fd, int, in_fd,
compat_off_t __user *, offset, compat_size_t, count)
{
loff_t pos;
off_t off;
ssize_t ret;
if (offset) {
if (unlikely(get_user(off, offset)))
return -EFAULT;
pos = off;
ret = do_sendfile(out_fd, in_fd, &pos, count, MAX_NON_LFS);
if (unlikely(put_user(pos, offset)))
return -EFAULT;
return ret;
}
return do_sendfile(out_fd, in_fd, NULL, count, 0);
}
COMPAT_SYSCALL_DEFINE4(sendfile64, int, out_fd, int, in_fd,
compat_loff_t __user *, offset, compat_size_t, count)
{
loff_t pos;
ssize_t ret;
if (offset) {
if (unlikely(copy_from_user(&pos, offset, sizeof(loff_t))))
return -EFAULT;
ret = do_sendfile(out_fd, in_fd, &pos, count, 0);
if (unlikely(put_user(pos, offset)))
return -EFAULT;
return ret;
}
return do_sendfile(out_fd, in_fd, NULL, count, 0);
}
#endif

2
fs/read_write.h
View File

@ -12,5 +12,3 @@ ssize_t do_sync_readv_writev(struct file *filp, const struct iovec *iov,
unsigned long nr_segs, size_t len, loff_t *ppos, iov_fn_t fn);
ssize_t do_loop_readv_writev(struct file *filp, struct iovec *iov,
unsigned long nr_segs, loff_t *ppos, io_fn_t fn);
ssize_t do_sendfile(int out_fd, int in_fd, loff_t *ppos, size_t count,
loff_t max);

2
include/linux/compat.h
View File

@ -670,6 +670,8 @@ asmlinkage ssize_t compat_sys_process_vm_writev(compat_pid_t pid,
asmlinkage long compat_sys_sendfile(int out_fd, int in_fd,
compat_off_t __user *offset, compat_size_t count);
asmlinkage long compat_sys_sendfile64(int out_fd, int in_fd,
compat_loff_t __user *offset, compat_size_t count);
asmlinkage long compat_sys_sigaltstack(const compat_stack_t __user *uss_ptr,
compat_stack_t __user *uoss_ptr);