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author | Jens Axboe <axboe@kernel.dk> | 2019-04-09 23:56:44 +0300 |
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committer | Jens Axboe <axboe@kernel.dk> | 2019-05-02 23:08:54 +0300 |
commit | 5d17b4a4b7fa172b205be8a05051ae705d1dc3bb (patch) | |
tree | 53f3203ab16e580a9882ba48bcc7e3226b39d50d /fs/io_uring.c | |
parent | 22f96b3808c12a218e9a3bce6e1bfbd74efbe374 (diff) | |
download | linux-5d17b4a4b7fa172b205be8a05051ae705d1dc3bb.tar.xz |
io_uring: add support for IORING_OP_SYNC_FILE_RANGE
This behaves just like sync_file_range(2) does.
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'fs/io_uring.c')
-rw-r--r-- | fs/io_uring.c | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/fs/io_uring.c b/fs/io_uring.c index b3333fec349a..468f9da472b2 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -1267,6 +1267,54 @@ static int io_fsync(struct io_kiocb *req, const struct io_uring_sqe *sqe, return 0; } +static int io_prep_sfr(struct io_kiocb *req, const struct io_uring_sqe *sqe) +{ + struct io_ring_ctx *ctx = req->ctx; + int ret = 0; + + if (!req->file) + return -EBADF; + /* Prep already done (EAGAIN retry) */ + if (req->flags & REQ_F_PREPPED) + return 0; + + if (unlikely(ctx->flags & IORING_SETUP_IOPOLL)) + return -EINVAL; + if (unlikely(sqe->addr || sqe->ioprio || sqe->buf_index)) + return -EINVAL; + + req->flags |= REQ_F_PREPPED; + return ret; +} + +static int io_sync_file_range(struct io_kiocb *req, + const struct io_uring_sqe *sqe, + bool force_nonblock) +{ + loff_t sqe_off; + loff_t sqe_len; + unsigned flags; + int ret; + + ret = io_prep_sfr(req, sqe); + if (ret) + return ret; + + /* sync_file_range always requires a blocking context */ + if (force_nonblock) + return -EAGAIN; + + sqe_off = READ_ONCE(sqe->off); + sqe_len = READ_ONCE(sqe->len); + flags = READ_ONCE(sqe->sync_range_flags); + + ret = sync_file_range(req->rw.ki_filp, sqe_off, sqe_len, flags); + + io_cqring_add_event(req->ctx, sqe->user_data, ret, 0); + io_put_req(req); + return 0; +} + static void io_poll_remove_one(struct io_kiocb *req) { struct io_poll_iocb *poll = &req->poll; @@ -1549,6 +1597,9 @@ static int __io_submit_sqe(struct io_ring_ctx *ctx, struct io_kiocb *req, case IORING_OP_POLL_REMOVE: ret = io_poll_remove(req, s->sqe); break; + case IORING_OP_SYNC_FILE_RANGE: + ret = io_sync_file_range(req, s->sqe, force_nonblock); + break; default: ret = -EINVAL; break; |