diff options
| author | Arnd Bergmann <arnd@arndb.de> | 2019-10-01 09:53:29 -0600 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2019-10-01 09:53:29 -0600 |
| commit | bdf200731145f07a6127cb16753e2e8fdc159cf4 (patch) | |
| tree | 1aaf15565a1b5d9fa7167842620d17c01c4666f3 /fs/io_uring.c | |
| parent | 85560117d00f5d528e928918b8f61cadcefff98b (diff) | |
| download | lwn-bdf200731145f07a6127cb16753e2e8fdc159cf4.tar.gz lwn-bdf200731145f07a6127cb16753e2e8fdc159cf4.zip | |
io_uring: use __kernel_timespec in timeout ABI
All system calls use struct __kernel_timespec instead of the old struct
timespec, but this one was just added with the old-style ABI. Change it
now to enforce the use of __kernel_timespec, avoiding ABI confusion and
the need for compat handlers on 32-bit architectures.
Any user space caller will have to use __kernel_timespec now, but this
is unambiguous and works for any C library regardless of the time_t
definition. A nicer way to specify the timeout would have been a less
ambiguous 64-bit nanosecond value, but I suppose it's too late now to
change that as this would impact both 32-bit and 64-bit users.
Fixes: 5262f567987d ("io_uring: IORING_OP_TIMEOUT support")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'fs/io_uring.c')
| -rw-r--r-- | fs/io_uring.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/fs/io_uring.c b/fs/io_uring.c index dd094b387cab..0bc167aca46d 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -1892,15 +1892,15 @@ static int io_timeout(struct io_kiocb *req, const struct io_uring_sqe *sqe) unsigned count, req_dist, tail_index; struct io_ring_ctx *ctx = req->ctx; struct list_head *entry; - struct timespec ts; + struct timespec64 ts; if (unlikely(ctx->flags & IORING_SETUP_IOPOLL)) return -EINVAL; if (sqe->flags || sqe->ioprio || sqe->buf_index || sqe->timeout_flags || sqe->len != 1) return -EINVAL; - if (copy_from_user(&ts, (void __user *) (unsigned long) sqe->addr, - sizeof(ts))) + + if (get_timespec64(&ts, u64_to_user_ptr(sqe->addr))) return -EFAULT; /* @@ -1934,7 +1934,7 @@ static int io_timeout(struct io_kiocb *req, const struct io_uring_sqe *sqe) hrtimer_init(&req->timeout.timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); req->timeout.timer.function = io_timeout_fn; - hrtimer_start(&req->timeout.timer, timespec_to_ktime(ts), + hrtimer_start(&req->timeout.timer, timespec64_to_ktime(ts), HRTIMER_MODE_REL); return 0; } |