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- // SPDX-License-Identifier: GPL-2.0
- /*
- * Copyright (C) 2016 Anton Ivanov ([email protected])
- * Copyright (C) 2000, 2001, 2002 Jeff Dike ([email protected])
- * Copyright (C) 2001 Ridgerun,Inc ([email protected])
- */
- #include <stddef.h>
- #include <unistd.h>
- #include <errno.h>
- #include <sched.h>
- #include <signal.h>
- #include <string.h>
- #include <netinet/in.h>
- #include <sys/time.h>
- #include <sys/socket.h>
- #include <sys/mman.h>
- #include <sys/param.h>
- #include <endian.h>
- #include <byteswap.h>
- #include "ubd.h"
- #include <os.h>
- #include <poll.h>
- struct pollfd kernel_pollfd;
- int start_io_thread(unsigned long sp, int *fd_out)
- {
- int pid, fds[2], err;
- err = os_pipe(fds, 1, 1);
- if(err < 0){
- printk("start_io_thread - os_pipe failed, err = %d\n", -err);
- goto out;
- }
- kernel_fd = fds[0];
- kernel_pollfd.fd = kernel_fd;
- kernel_pollfd.events = POLLIN;
- *fd_out = fds[1];
- err = os_set_fd_block(*fd_out, 0);
- err = os_set_fd_block(kernel_fd, 0);
- if (err) {
- printk("start_io_thread - failed to set nonblocking I/O.\n");
- goto out_close;
- }
- pid = clone(io_thread, (void *) sp, CLONE_FILES | CLONE_VM, NULL);
- if(pid < 0){
- err = -errno;
- printk("start_io_thread - clone failed : errno = %d\n", errno);
- goto out_close;
- }
- return(pid);
- out_close:
- os_close_file(fds[0]);
- os_close_file(fds[1]);
- kernel_fd = -1;
- *fd_out = -1;
- out:
- return err;
- }
- int ubd_read_poll(int timeout)
- {
- kernel_pollfd.events = POLLIN;
- return poll(&kernel_pollfd, 1, timeout);
- }
- int ubd_write_poll(int timeout)
- {
- kernel_pollfd.events = POLLOUT;
- return poll(&kernel_pollfd, 1, timeout);
- }
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