io_uring_prep_sync_file_range - prepare a sync_file_range request
#include <fcntl.h> #include <liburing.h> void io_uring_prep_sync_file_range(struct io_uring_sqe *sqe, int fd, unsigned len, __u64 offset, int flags);
The io_uring_prep_sync_file_range(3) function prepares a sync_file_range request. The submission queue entry sqe is setup to use the file descriptor fd that should get len bytes synced started at offset offset and with modifier flags in the flags argument. This function prepares an async sync_file_range(2) request. See that man page for details on the arguments.
The CQE res field will contain the result of the operation. See the related man page for details on possible values. Note that where synchronous system calls will return -1 on failure and set errno to the actual error value, io_uring never uses errno. Instead it returns the negated errno directly in the CQE res field.
io_uring_get_sqe(3), io_uring_submit(3), sync_file_range(2)
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