| Jeff Dike | 91acb21 | 2005-10-10 23:10:32 -0400 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com) |
| 3 | * Copyright (C) 2001 Ridgerun,Inc (glonnon@ridgerun.com) |
| 4 | * Licensed under the GPL |
| 5 | */ |
| 6 | |
| 7 | #include <stddef.h> |
| 8 | #include <unistd.h> |
| 9 | #include <errno.h> |
| 10 | #include <sched.h> |
| 11 | #include <signal.h> |
| 12 | #include <string.h> |
| 13 | #include <netinet/in.h> |
| 14 | #include <sys/time.h> |
| 15 | #include <sys/socket.h> |
| 16 | #include <sys/mman.h> |
| 17 | #include <sys/param.h> |
| 18 | #include "asm/types.h" |
| 19 | #include "user_util.h" |
| 20 | #include "kern_util.h" |
| 21 | #include "user.h" |
| 22 | #include "ubd_user.h" |
| 23 | #include "os.h" |
| 24 | #include "cow.h" |
| 25 | |
| 26 | #include <endian.h> |
| 27 | #include <byteswap.h> |
| 28 | |
| 29 | void ignore_sigwinch_sig(void) |
| 30 | { |
| 31 | signal(SIGWINCH, SIG_IGN); |
| 32 | } |
| 33 | |
| 34 | int start_io_thread(unsigned long sp, int *fd_out) |
| 35 | { |
| 36 | int pid, fds[2], err; |
| 37 | |
| 38 | err = os_pipe(fds, 1, 1); |
| 39 | if(err < 0){ |
| 40 | printk("start_io_thread - os_pipe failed, err = %d\n", -err); |
| 41 | goto out; |
| 42 | } |
| 43 | |
| 44 | kernel_fd = fds[0]; |
| 45 | *fd_out = fds[1]; |
| 46 | |
| 47 | pid = clone(io_thread, (void *) sp, CLONE_FILES | CLONE_VM | SIGCHLD, |
| 48 | NULL); |
| 49 | if(pid < 0){ |
| 50 | printk("start_io_thread - clone failed : errno = %d\n", errno); |
| 51 | err = -errno; |
| 52 | goto out_close; |
| 53 | } |
| 54 | |
| 55 | return(pid); |
| 56 | |
| 57 | out_close: |
| 58 | os_close_file(fds[0]); |
| 59 | os_close_file(fds[1]); |
| 60 | kernel_fd = -1; |
| 61 | *fd_out = -1; |
| 62 | out: |
| 63 | return(err); |
| 64 | } |
| 65 | |
| 66 | /* |
| 67 | * Overrides for Emacs so that we follow Linus's tabbing style. |
| 68 | * Emacs will notice this stuff at the end of the file and automatically |
| 69 | * adjust the settings for this buffer only. This must remain at the end |
| 70 | * of the file. |
| 71 | * --------------------------------------------------------------------------- |
| 72 | * Local variables: |
| 73 | * c-file-style: "linux" |
| 74 | * End: |
| 75 | */ |