file.c (597473720f4dc69749542bfcfed4a927a43d935e) file.c (5d38f324993f49d1226ec81efe045834b46cd85a)
1/*
2 * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
3 * Licensed under the GPL
4 */
5
6#include <stdio.h>
7#include <unistd.h>
8#include <errno.h>
9#include <fcntl.h>
10#include <signal.h>
11#include <sys/ioctl.h>
12#include <sys/mount.h>
13#include <sys/socket.h>
14#include <sys/stat.h>
15#include <sys/sysmacros.h>
16#include <sys/un.h>
17#include <sys/types.h>
1/*
2 * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
3 * Licensed under the GPL
4 */
5
6#include <stdio.h>
7#include <unistd.h>
8#include <errno.h>
9#include <fcntl.h>
10#include <signal.h>
11#include <sys/ioctl.h>
12#include <sys/mount.h>
13#include <sys/socket.h>
14#include <sys/stat.h>
15#include <sys/sysmacros.h>
16#include <sys/un.h>
17#include <sys/types.h>
18#include <sys/eventfd.h>
18#include <os.h>
19
20static void copy_stat(struct uml_stat *dst, const struct stat64 *src)
21{
22 *dst = ((struct uml_stat) {
23 .ust_dev = src->st_dev, /* device */
24 .ust_ino = src->st_ino, /* inode */
25 .ust_mode = src->st_mode, /* protection */

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615{
616 int n = fallocate(fd, FALLOC_FL_PUNCH_HOLE|FALLOC_FL_KEEP_SIZE, offset, len);
617
618 if (n < 0)
619 return -errno;
620 return n;
621}
622
19#include <os.h>
20
21static void copy_stat(struct uml_stat *dst, const struct stat64 *src)
22{
23 *dst = ((struct uml_stat) {
24 .ust_dev = src->st_dev, /* device */
25 .ust_ino = src->st_ino, /* inode */
26 .ust_mode = src->st_mode, /* protection */

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616{
617 int n = fallocate(fd, FALLOC_FL_PUNCH_HOLE|FALLOC_FL_KEEP_SIZE, offset, len);
618
619 if (n < 0)
620 return -errno;
621 return n;
622}
623
624int os_eventfd(unsigned int initval, int flags)
625{
626 int fd = eventfd(initval, flags);
627
628 if (fd < 0)
629 return -errno;
630 return fd;
631}
632
633int os_sendmsg_fds(int fd, const void *buf, unsigned int len, const int *fds,
634 unsigned int fds_num)
635{
636 struct iovec iov = {
637 .iov_base = (void *) buf,
638 .iov_len = len,
639 };
640 union {
641 char control[CMSG_SPACE(sizeof(*fds) * OS_SENDMSG_MAX_FDS)];
642 struct cmsghdr align;
643 } u;
644 unsigned int fds_size = sizeof(*fds) * fds_num;
645 struct msghdr msg = {
646 .msg_iov = &iov,
647 .msg_iovlen = 1,
648 .msg_control = u.control,
649 .msg_controllen = CMSG_SPACE(fds_size),
650 };
651 struct cmsghdr *cmsg = CMSG_FIRSTHDR(&msg);
652 int err;
653
654 if (fds_num > OS_SENDMSG_MAX_FDS)
655 return -EINVAL;
656 memset(u.control, 0, sizeof(u.control));
657 cmsg->cmsg_level = SOL_SOCKET;
658 cmsg->cmsg_type = SCM_RIGHTS;
659 cmsg->cmsg_len = CMSG_LEN(fds_size);
660 memcpy(CMSG_DATA(cmsg), fds, fds_size);
661 err = sendmsg(fd, &msg, 0);
662
663 if (err < 0)
664 return -errno;
665 return err;
666}