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Diffstat (limited to 'fs/compat.c')
-rw-r--r--fs/compat.c162
1 files changed, 89 insertions, 73 deletions
diff --git a/fs/compat.c b/fs/compat.c
index 6af20de2c1a..66d3d3c6b4b 100644
--- a/fs/compat.c
+++ b/fs/compat.c
@@ -72,8 +72,8 @@ int compat_printk(const char *fmt, ...)
* Not all architectures have sys_utime, so implement this in terms
* of sys_utimes.
*/
-asmlinkage long compat_sys_utime(const char __user *filename,
- struct compat_utimbuf __user *t)
+COMPAT_SYSCALL_DEFINE2(utime, const char __user *, filename,
+ struct compat_utimbuf __user *, t)
{
struct timespec tv[2];
@@ -87,13 +87,13 @@ asmlinkage long compat_sys_utime(const char __user *filename,
return do_utimes(AT_FDCWD, filename, t ? tv : NULL, 0);
}
-asmlinkage long compat_sys_utimensat(unsigned int dfd, const char __user *filename, struct compat_timespec __user *t, int flags)
+COMPAT_SYSCALL_DEFINE4(utimensat, unsigned int, dfd, const char __user *, filename, struct compat_timespec __user *, t, int, flags)
{
struct timespec tv[2];
if (t) {
- if (get_compat_timespec(&tv[0], &t[0]) ||
- get_compat_timespec(&tv[1], &t[1]))
+ if (compat_get_timespec(&tv[0], &t[0]) ||
+ compat_get_timespec(&tv[1], &t[1]))
return -EFAULT;
if (tv[0].tv_nsec == UTIME_OMIT && tv[1].tv_nsec == UTIME_OMIT)
@@ -102,7 +102,7 @@ asmlinkage long compat_sys_utimensat(unsigned int dfd, const char __user *filena
return do_utimes(dfd, filename, t ? tv : NULL, flags);
}
-asmlinkage long compat_sys_futimesat(unsigned int dfd, const char __user *filename, struct compat_timeval __user *t)
+COMPAT_SYSCALL_DEFINE3(futimesat, unsigned int, dfd, const char __user *, filename, struct compat_timeval __user *, t)
{
struct timespec tv[2];
@@ -121,7 +121,7 @@ asmlinkage long compat_sys_futimesat(unsigned int dfd, const char __user *filena
return do_utimes(dfd, filename, t ? tv : NULL, 0);
}
-asmlinkage long compat_sys_utimes(const char __user *filename, struct compat_timeval __user *t)
+COMPAT_SYSCALL_DEFINE2(utimes, const char __user *, filename, struct compat_timeval __user *, t)
{
return compat_sys_futimesat(AT_FDCWD, filename, t);
}
@@ -159,8 +159,8 @@ static int cp_compat_stat(struct kstat *stat, struct compat_stat __user *ubuf)
return copy_to_user(ubuf, &tmp, sizeof(tmp)) ? -EFAULT : 0;
}
-asmlinkage long compat_sys_newstat(const char __user * filename,
- struct compat_stat __user *statbuf)
+COMPAT_SYSCALL_DEFINE2(newstat, const char __user *, filename,
+ struct compat_stat __user *, statbuf)
{
struct kstat stat;
int error;
@@ -171,8 +171,8 @@ asmlinkage long compat_sys_newstat(const char __user * filename,
return cp_compat_stat(&stat, statbuf);
}
-asmlinkage long compat_sys_newlstat(const char __user * filename,
- struct compat_stat __user *statbuf)
+COMPAT_SYSCALL_DEFINE2(newlstat, const char __user *, filename,
+ struct compat_stat __user *, statbuf)
{
struct kstat stat;
int error;
@@ -184,9 +184,9 @@ asmlinkage long compat_sys_newlstat(const char __user * filename,
}
#ifndef __ARCH_WANT_STAT64
-asmlinkage long compat_sys_newfstatat(unsigned int dfd,
- const char __user *filename,
- struct compat_stat __user *statbuf, int flag)
+COMPAT_SYSCALL_DEFINE4(newfstatat, unsigned int, dfd,
+ const char __user *, filename,
+ struct compat_stat __user *, statbuf, int, flag)
{
struct kstat stat;
int error;
@@ -198,8 +198,8 @@ asmlinkage long compat_sys_newfstatat(unsigned int dfd,
}
#endif
-asmlinkage long compat_sys_newfstat(unsigned int fd,
- struct compat_stat __user * statbuf)
+COMPAT_SYSCALL_DEFINE2(newfstat, unsigned int, fd,
+ struct compat_stat __user *, statbuf)
{
struct kstat stat;
int error = vfs_fstat(fd, &stat);
@@ -247,7 +247,7 @@ static int put_compat_statfs(struct compat_statfs __user *ubuf, struct kstatfs *
* The following statfs calls are copies of code from fs/statfs.c and
* should be checked against those from time to time
*/
-asmlinkage long compat_sys_statfs(const char __user *pathname, struct compat_statfs __user *buf)
+COMPAT_SYSCALL_DEFINE2(statfs, const char __user *, pathname, struct compat_statfs __user *, buf)
{
struct kstatfs tmp;
int error = user_statfs(pathname, &tmp);
@@ -256,7 +256,7 @@ asmlinkage long compat_sys_statfs(const char __user *pathname, struct compat_sta
return error;
}
-asmlinkage long compat_sys_fstatfs(unsigned int fd, struct compat_statfs __user *buf)
+COMPAT_SYSCALL_DEFINE2(fstatfs, unsigned int, fd, struct compat_statfs __user *, buf)
{
struct kstatfs tmp;
int error = fd_statfs(fd, &tmp);
@@ -298,7 +298,7 @@ static int put_compat_statfs64(struct compat_statfs64 __user *ubuf, struct kstat
return 0;
}
-asmlinkage long compat_sys_statfs64(const char __user *pathname, compat_size_t sz, struct compat_statfs64 __user *buf)
+COMPAT_SYSCALL_DEFINE3(statfs64, const char __user *, pathname, compat_size_t, sz, struct compat_statfs64 __user *, buf)
{
struct kstatfs tmp;
int error;
@@ -312,7 +312,7 @@ asmlinkage long compat_sys_statfs64(const char __user *pathname, compat_size_t s
return error;
}
-asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz, struct compat_statfs64 __user *buf)
+COMPAT_SYSCALL_DEFINE3(fstatfs64, unsigned int, fd, compat_size_t, sz, struct compat_statfs64 __user *, buf)
{
struct kstatfs tmp;
int error;
@@ -331,7 +331,7 @@ asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz, struct c
* Given how simple this syscall is that apporach is more maintainable
* than the various conversion hacks.
*/
-asmlinkage long compat_sys_ustat(unsigned dev, struct compat_ustat __user *u)
+COMPAT_SYSCALL_DEFINE2(ustat, unsigned, dev, struct compat_ustat __user *, u)
{
struct compat_ustat tmp;
struct kstatfs sbuf;
@@ -399,12 +399,28 @@ static int put_compat_flock64(struct flock *kfl, struct compat_flock64 __user *u
}
#endif
-asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd,
- unsigned long arg)
+static unsigned int
+convert_fcntl_cmd(unsigned int cmd)
+{
+ switch (cmd) {
+ case F_GETLK64:
+ return F_GETLK;
+ case F_SETLK64:
+ return F_SETLK;
+ case F_SETLKW64:
+ return F_SETLKW;
+ }
+
+ return cmd;
+}
+
+COMPAT_SYSCALL_DEFINE3(fcntl64, unsigned int, fd, unsigned int, cmd,
+ compat_ulong_t, arg)
{
mm_segment_t old_fs;
struct flock f;
long ret;
+ unsigned int conv_cmd;
switch (cmd) {
case F_GETLK:
@@ -441,16 +457,18 @@ asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd,
case F_GETLK64:
case F_SETLK64:
case F_SETLKW64:
+ case F_OFD_GETLK:
+ case F_OFD_SETLK:
+ case F_OFD_SETLKW:
ret = get_compat_flock64(&f, compat_ptr(arg));
if (ret != 0)
break;
old_fs = get_fs();
set_fs(KERNEL_DS);
- ret = sys_fcntl(fd, (cmd == F_GETLK64) ? F_GETLK :
- ((cmd == F_SETLK64) ? F_SETLK : F_SETLKW),
- (unsigned long)&f);
+ conv_cmd = convert_fcntl_cmd(cmd);
+ ret = sys_fcntl(fd, conv_cmd, (unsigned long)&f);
set_fs(old_fs);
- if (cmd == F_GETLK64 && ret == 0) {
+ if ((conv_cmd == F_GETLK || conv_cmd == F_OFD_GETLK) && ret == 0) {
/* need to return lock information - see above for commentary */
if (f.l_start > COMPAT_LOFF_T_MAX)
ret = -EOVERFLOW;
@@ -468,16 +486,22 @@ asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd,
return ret;
}
-asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd,
- unsigned long arg)
+COMPAT_SYSCALL_DEFINE3(fcntl, unsigned int, fd, unsigned int, cmd,
+ compat_ulong_t, arg)
{
- if ((cmd == F_GETLK64) || (cmd == F_SETLK64) || (cmd == F_SETLKW64))
+ switch (cmd) {
+ case F_GETLK64:
+ case F_SETLK64:
+ case F_SETLKW64:
+ case F_OFD_GETLK:
+ case F_OFD_SETLK:
+ case F_OFD_SETLKW:
return -EINVAL;
+ }
return compat_sys_fcntl64(fd, cmd, arg);
}
-asmlinkage long
-compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p)
+COMPAT_SYSCALL_DEFINE2(io_setup, unsigned, nr_reqs, u32 __user *, ctx32p)
{
long ret;
aio_context_t ctx64;
@@ -496,32 +520,24 @@ compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p)
return ret;
}
-asmlinkage long
-compat_sys_io_getevents(aio_context_t ctx_id,
- unsigned long min_nr,
- unsigned long nr,
- struct io_event __user *events,
- struct compat_timespec __user *timeout)
+COMPAT_SYSCALL_DEFINE5(io_getevents, compat_aio_context_t, ctx_id,
+ compat_long_t, min_nr,
+ compat_long_t, nr,
+ struct io_event __user *, events,
+ struct compat_timespec __user *, timeout)
{
- long ret;
struct timespec t;
struct timespec __user *ut = NULL;
- ret = -EFAULT;
- if (unlikely(!access_ok(VERIFY_WRITE, events,
- nr * sizeof(struct io_event))))
- goto out;
if (timeout) {
- if (get_compat_timespec(&t, timeout))
- goto out;
+ if (compat_get_timespec(&t, timeout))
+ return -EFAULT;
ut = compat_alloc_user_space(sizeof(*ut));
if (copy_to_user(ut, &t, sizeof(t)) )
- goto out;
+ return -EFAULT;
}
- ret = sys_io_getevents(ctx_id, min_nr, nr, events, ut);
-out:
- return ret;
+ return sys_io_getevents(ctx_id, min_nr, nr, events, ut);
}
/* A write operation does a read from user space and vice versa */
@@ -617,8 +633,8 @@ copy_iocb(long nr, u32 __user *ptr32, struct iocb __user * __user *ptr64)
#define MAX_AIO_SUBMITS (PAGE_SIZE/sizeof(struct iocb *))
-asmlinkage long
-compat_sys_io_submit(aio_context_t ctx_id, int nr, u32 __user *iocb)
+COMPAT_SYSCALL_DEFINE3(io_submit, compat_aio_context_t, ctx_id,
+ int, nr, u32 __user *, iocb)
{
struct iocb __user * __user *iocb64;
long ret;
@@ -770,10 +786,10 @@ static int do_nfs4_super_data_conv(void *raw_data)
#define NCPFS_NAME "ncpfs"
#define NFS4_NAME "nfs4"
-asmlinkage long compat_sys_mount(const char __user * dev_name,
- const char __user * dir_name,
- const char __user * type, unsigned long flags,
- const void __user * data)
+COMPAT_SYSCALL_DEFINE5(mount, const char __user *, dev_name,
+ const char __user *, dir_name,
+ const char __user *, type, compat_ulong_t, flags,
+ const void __user *, data)
{
char *kernel_type;
unsigned long data_page;
@@ -869,8 +885,8 @@ efault:
return -EFAULT;
}
-asmlinkage long compat_sys_old_readdir(unsigned int fd,
- struct compat_old_linux_dirent __user *dirent, unsigned int count)
+COMPAT_SYSCALL_DEFINE3(old_readdir, unsigned int, fd,
+ struct compat_old_linux_dirent __user *, dirent, unsigned int, count)
{
int error;
struct fd f = fdget(fd);
@@ -948,8 +964,8 @@ efault:
return -EFAULT;
}
-asmlinkage long compat_sys_getdents(unsigned int fd,
- struct compat_linux_dirent __user *dirent, unsigned int count)
+COMPAT_SYSCALL_DEFINE3(getdents, unsigned int, fd,
+ struct compat_linux_dirent __user *, dirent, unsigned int, count)
{
struct fd f;
struct compat_linux_dirent __user * lastdirent;
@@ -981,7 +997,7 @@ asmlinkage long compat_sys_getdents(unsigned int fd,
return error;
}
-#ifndef __ARCH_OMIT_COMPAT_SYS_GETDENTS64
+#ifdef __ARCH_WANT_COMPAT_SYS_GETDENTS64
struct compat_getdents_callback64 {
struct dir_context ctx;
@@ -1033,8 +1049,8 @@ efault:
return -EFAULT;
}
-asmlinkage long compat_sys_getdents64(unsigned int fd,
- struct linux_dirent64 __user * dirent, unsigned int count)
+COMPAT_SYSCALL_DEFINE3(getdents64, unsigned int, fd,
+ struct linux_dirent64 __user *, dirent, unsigned int, count)
{
struct fd f;
struct linux_dirent64 __user * lastdirent;
@@ -1066,7 +1082,7 @@ asmlinkage long compat_sys_getdents64(unsigned int fd,
fdput(f);
return error;
}
-#endif /* ! __ARCH_OMIT_COMPAT_SYS_GETDENTS64 */
+#endif /* __ARCH_WANT_COMPAT_SYS_GETDENTS64 */
/*
* Exactly like fs/open.c:sys_open(), except that it doesn't set the
@@ -1287,9 +1303,9 @@ out_nofds:
return ret;
}
-asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp,
- compat_ulong_t __user *outp, compat_ulong_t __user *exp,
- struct compat_timeval __user *tvp)
+COMPAT_SYSCALL_DEFINE5(select, int, n, compat_ulong_t __user *, inp,
+ compat_ulong_t __user *, outp, compat_ulong_t __user *, exp,
+ struct compat_timeval __user *, tvp)
{
struct timespec end_time, *to = NULL;
struct compat_timeval tv;
@@ -1320,7 +1336,7 @@ struct compat_sel_arg_struct {
compat_uptr_t tvp;
};
-asmlinkage long compat_sys_old_select(struct compat_sel_arg_struct __user *arg)
+COMPAT_SYSCALL_DEFINE1(old_select, struct compat_sel_arg_struct __user *, arg)
{
struct compat_sel_arg_struct a;
@@ -1381,9 +1397,9 @@ static long do_compat_pselect(int n, compat_ulong_t __user *inp,
return ret;
}
-asmlinkage long compat_sys_pselect6(int n, compat_ulong_t __user *inp,
- compat_ulong_t __user *outp, compat_ulong_t __user *exp,
- struct compat_timespec __user *tsp, void __user *sig)
+COMPAT_SYSCALL_DEFINE6(pselect6, int, n, compat_ulong_t __user *, inp,
+ compat_ulong_t __user *, outp, compat_ulong_t __user *, exp,
+ struct compat_timespec __user *, tsp, void __user *, sig)
{
compat_size_t sigsetsize = 0;
compat_uptr_t up = 0;
@@ -1400,9 +1416,9 @@ asmlinkage long compat_sys_pselect6(int n, compat_ulong_t __user *inp,
sigsetsize);
}
-asmlinkage long compat_sys_ppoll(struct pollfd __user *ufds,
- unsigned int nfds, struct compat_timespec __user *tsp,
- const compat_sigset_t __user *sigmask, compat_size_t sigsetsize)
+COMPAT_SYSCALL_DEFINE5(ppoll, struct pollfd __user *, ufds,
+ unsigned int, nfds, struct compat_timespec __user *, tsp,
+ const compat_sigset_t __user *, sigmask, compat_size_t, sigsetsize)
{
compat_sigset_t ss32;
sigset_t ksigmask, sigsaved;
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-04 01:22:51 +0000