summaryrefslogtreecommitdiffstats
path: root/io_uring/sync.c
diff options
context:
space:
mode:
Diffstat (limited to 'io_uring/sync.c')
-rw-r--r--io_uring/sync.c112
1 files changed, 112 insertions, 0 deletions
diff --git a/io_uring/sync.c b/io_uring/sync.c
new file mode 100644
index 0000000000..255f68c37e
--- /dev/null
+++ b/io_uring/sync.c
@@ -0,0 +1,112 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/fs.h>
+#include <linux/file.h>
+#include <linux/mm.h>
+#include <linux/slab.h>
+#include <linux/namei.h>
+#include <linux/io_uring.h>
+#include <linux/fsnotify.h>
+
+#include <uapi/linux/io_uring.h>
+
+#include "io_uring.h"
+#include "sync.h"
+
+struct io_sync {
+ struct file *file;
+ loff_t len;
+ loff_t off;
+ int flags;
+ int mode;
+};
+
+int io_sfr_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
+{
+ struct io_sync *sync = io_kiocb_to_cmd(req, struct io_sync);
+
+ if (unlikely(sqe->addr || sqe->buf_index || sqe->splice_fd_in))
+ return -EINVAL;
+
+ sync->off = READ_ONCE(sqe->off);
+ sync->len = READ_ONCE(sqe->len);
+ sync->flags = READ_ONCE(sqe->sync_range_flags);
+ req->flags |= REQ_F_FORCE_ASYNC;
+
+ return 0;
+}
+
+int io_sync_file_range(struct io_kiocb *req, unsigned int issue_flags)
+{
+ struct io_sync *sync = io_kiocb_to_cmd(req, struct io_sync);
+ int ret;
+
+ /* sync_file_range always requires a blocking context */
+ WARN_ON_ONCE(issue_flags & IO_URING_F_NONBLOCK);
+
+ ret = sync_file_range(req->file, sync->off, sync->len, sync->flags);
+ io_req_set_res(req, ret, 0);
+ return IOU_OK;
+}
+
+int io_fsync_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
+{
+ struct io_sync *sync = io_kiocb_to_cmd(req, struct io_sync);
+
+ if (unlikely(sqe->addr || sqe->buf_index || sqe->splice_fd_in))
+ return -EINVAL;
+
+ sync->flags = READ_ONCE(sqe->fsync_flags);
+ if (unlikely(sync->flags & ~IORING_FSYNC_DATASYNC))
+ return -EINVAL;
+
+ sync->off = READ_ONCE(sqe->off);
+ sync->len = READ_ONCE(sqe->len);
+ req->flags |= REQ_F_FORCE_ASYNC;
+ return 0;
+}
+
+int io_fsync(struct io_kiocb *req, unsigned int issue_flags)
+{
+ struct io_sync *sync = io_kiocb_to_cmd(req, struct io_sync);
+ loff_t end = sync->off + sync->len;
+ int ret;
+
+ /* fsync always requires a blocking context */
+ WARN_ON_ONCE(issue_flags & IO_URING_F_NONBLOCK);
+
+ ret = vfs_fsync_range(req->file, sync->off, end > 0 ? end : LLONG_MAX,
+ sync->flags & IORING_FSYNC_DATASYNC);
+ io_req_set_res(req, ret, 0);
+ return IOU_OK;
+}
+
+int io_fallocate_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
+{
+ struct io_sync *sync = io_kiocb_to_cmd(req, struct io_sync);
+
+ if (sqe->buf_index || sqe->rw_flags || sqe->splice_fd_in)
+ return -EINVAL;
+
+ sync->off = READ_ONCE(sqe->off);
+ sync->len = READ_ONCE(sqe->addr);
+ sync->mode = READ_ONCE(sqe->len);
+ req->flags |= REQ_F_FORCE_ASYNC;
+ return 0;
+}
+
+int io_fallocate(struct io_kiocb *req, unsigned int issue_flags)
+{
+ struct io_sync *sync = io_kiocb_to_cmd(req, struct io_sync);
+ int ret;
+
+ /* fallocate always requiring blocking context */
+ WARN_ON_ONCE(issue_flags & IO_URING_F_NONBLOCK);
+
+ ret = vfs_fallocate(req->file, sync->mode, sync->off, sync->len);
+ if (ret >= 0)
+ fsnotify_modify(req->file);
+ io_req_set_res(req, ret, 0);
+ return IOU_OK;
+}