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authorAl Viro <viro@zeniv.linux.org.uk>2016-12-20 13:04:57 +0100
committerAl Viro <viro@zeniv.linux.org.uk>2016-12-23 04:58:37 +0100
commitc00d2c7e89880036f288a764599b2b8b87c0a364 (patch)
tree4f8690123b657080bd6c682e5f326b1b118ed630 /fs/compat.c
parentMerge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jac... (diff)
downloadlinux-c00d2c7e89880036f288a764599b2b8b87c0a364.tar.xz
linux-c00d2c7e89880036f288a764599b2b8b87c0a364.zip
move aio compat to fs/aio.c
... and fix the minor buglet in compat io_submit() - native one kills ioctx as cleanup when put_user() fails. Get rid of bogus compat_... in !CONFIG_AIO case, while we are at it - they should simply fail with ENOSYS, same as for native counterparts. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/compat.c')
-rw-r--r--fs/compat.c75
1 files changed, 0 insertions, 75 deletions
diff --git a/fs/compat.c b/fs/compat.c
index 543b48c29ac3..3f4908c28698 100644
--- a/fs/compat.c
+++ b/fs/compat.c
@@ -487,45 +487,6 @@ COMPAT_SYSCALL_DEFINE3(fcntl, unsigned int, fd, unsigned int, cmd,
return compat_sys_fcntl64(fd, cmd, arg);
}
-COMPAT_SYSCALL_DEFINE2(io_setup, unsigned, nr_reqs, u32 __user *, ctx32p)
-{
- long ret;
- aio_context_t ctx64;
-
- mm_segment_t oldfs = get_fs();
- if (unlikely(get_user(ctx64, ctx32p)))
- return -EFAULT;
-
- set_fs(KERNEL_DS);
- /* The __user pointer cast is valid because of the set_fs() */
- ret = sys_io_setup(nr_reqs, (aio_context_t __user *) &ctx64);
- set_fs(oldfs);
- /* truncating is ok because it's a user address */
- if (!ret)
- ret = put_user((u32) ctx64, ctx32p);
- return ret;
-}
-
-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)
-{
- struct timespec t;
- struct timespec __user *ut = NULL;
-
- if (timeout) {
- if (compat_get_timespec(&t, timeout))
- return -EFAULT;
-
- ut = compat_alloc_user_space(sizeof(*ut));
- if (copy_to_user(ut, &t, sizeof(t)) )
- return -EFAULT;
- }
- return sys_io_getevents(ctx_id, min_nr, nr, events, ut);
-}
-
/* A write operation does a read from user space and vice versa */
#define vrfy_dir(type) ((type) == READ ? VERIFY_WRITE : VERIFY_READ)
@@ -602,42 +563,6 @@ out:
return ret;
}
-static inline long
-copy_iocb(long nr, u32 __user *ptr32, struct iocb __user * __user *ptr64)
-{
- compat_uptr_t uptr;
- int i;
-
- for (i = 0; i < nr; ++i) {
- if (get_user(uptr, ptr32 + i))
- return -EFAULT;
- if (put_user(compat_ptr(uptr), ptr64 + i))
- return -EFAULT;
- }
- return 0;
-}
-
-#define MAX_AIO_SUBMITS (PAGE_SIZE/sizeof(struct iocb *))
-
-COMPAT_SYSCALL_DEFINE3(io_submit, compat_aio_context_t, ctx_id,
- int, nr, u32 __user *, iocb)
-{
- struct iocb __user * __user *iocb64;
- long ret;
-
- if (unlikely(nr < 0))
- return -EINVAL;
-
- if (nr > MAX_AIO_SUBMITS)
- nr = MAX_AIO_SUBMITS;
-
- iocb64 = compat_alloc_user_space(nr * sizeof(*iocb64));
- ret = copy_iocb(nr, iocb, iocb64);
- if (!ret)
- ret = do_io_submit(ctx_id, nr, iocb64, 1);
- return ret;
-}
-
struct compat_ncp_mount_data {
compat_int_t version;
compat_uint_t ncp_fd;