mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-10 14:06:39 +07:00
bf53d85ec2
The .a flags in openflags never had an implementation. Signed-off-by: Jeff Dike <jdike@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
564 lines
10 KiB
C
564 lines
10 KiB
C
/*
|
|
* Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
|
|
* Licensed under the GPL
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <unistd.h>
|
|
#include <errno.h>
|
|
#include <fcntl.h>
|
|
#include <signal.h>
|
|
#include <sys/ioctl.h>
|
|
#include <sys/mount.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/stat.h>
|
|
#include <sys/un.h>
|
|
#include "kern_constants.h"
|
|
#include "os.h"
|
|
#include "user.h"
|
|
|
|
static void copy_stat(struct uml_stat *dst, const struct stat64 *src)
|
|
{
|
|
*dst = ((struct uml_stat) {
|
|
.ust_dev = src->st_dev, /* device */
|
|
.ust_ino = src->st_ino, /* inode */
|
|
.ust_mode = src->st_mode, /* protection */
|
|
.ust_nlink = src->st_nlink, /* number of hard links */
|
|
.ust_uid = src->st_uid, /* user ID of owner */
|
|
.ust_gid = src->st_gid, /* group ID of owner */
|
|
.ust_size = src->st_size, /* total size, in bytes */
|
|
.ust_blksize = src->st_blksize, /* blocksize for filesys I/O */
|
|
.ust_blocks = src->st_blocks, /* number of blocks allocated */
|
|
.ust_atime = src->st_atime, /* time of last access */
|
|
.ust_mtime = src->st_mtime, /* time of last modification */
|
|
.ust_ctime = src->st_ctime, /* time of last change */
|
|
});
|
|
}
|
|
|
|
int os_stat_fd(const int fd, struct uml_stat *ubuf)
|
|
{
|
|
struct stat64 sbuf;
|
|
int err;
|
|
|
|
CATCH_EINTR(err = fstat64(fd, &sbuf));
|
|
if (err < 0)
|
|
return -errno;
|
|
|
|
if (ubuf != NULL)
|
|
copy_stat(ubuf, &sbuf);
|
|
return err;
|
|
}
|
|
|
|
int os_stat_file(const char *file_name, struct uml_stat *ubuf)
|
|
{
|
|
struct stat64 sbuf;
|
|
int err;
|
|
|
|
CATCH_EINTR(err = stat64(file_name, &sbuf));
|
|
if (err < 0)
|
|
return -errno;
|
|
|
|
if (ubuf != NULL)
|
|
copy_stat(ubuf, &sbuf);
|
|
return err;
|
|
}
|
|
|
|
int os_access(const char *file, int mode)
|
|
{
|
|
int amode, err;
|
|
|
|
amode = (mode & OS_ACC_R_OK ? R_OK : 0) |
|
|
(mode & OS_ACC_W_OK ? W_OK : 0) |
|
|
(mode & OS_ACC_X_OK ? X_OK : 0) |
|
|
(mode & OS_ACC_F_OK ? F_OK : 0);
|
|
|
|
err = access(file, amode);
|
|
if (err < 0)
|
|
return -errno;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* FIXME? required only by hostaudio (because it passes ioctls verbatim) */
|
|
int os_ioctl_generic(int fd, unsigned int cmd, unsigned long arg)
|
|
{
|
|
int err;
|
|
|
|
err = ioctl(fd, cmd, arg);
|
|
if (err < 0)
|
|
return -errno;
|
|
|
|
return err;
|
|
}
|
|
|
|
/* FIXME: ensure namebuf in os_get_if_name is big enough */
|
|
int os_get_ifname(int fd, char* namebuf)
|
|
{
|
|
if (ioctl(fd, SIOCGIFNAME, namebuf) < 0)
|
|
return -errno;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int os_set_slip(int fd)
|
|
{
|
|
int disc, sencap;
|
|
|
|
disc = N_SLIP;
|
|
if (ioctl(fd, TIOCSETD, &disc) < 0)
|
|
return -errno;
|
|
|
|
sencap = 0;
|
|
if (ioctl(fd, SIOCSIFENCAP, &sencap) < 0)
|
|
return -errno;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int os_mode_fd(int fd, int mode)
|
|
{
|
|
int err;
|
|
|
|
CATCH_EINTR(err = fchmod(fd, mode));
|
|
if (err < 0)
|
|
return -errno;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int os_file_type(char *file)
|
|
{
|
|
struct uml_stat buf;
|
|
int err;
|
|
|
|
err = os_stat_file(file, &buf);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
if (S_ISDIR(buf.ust_mode))
|
|
return OS_TYPE_DIR;
|
|
else if (S_ISLNK(buf.ust_mode))
|
|
return OS_TYPE_SYMLINK;
|
|
else if (S_ISCHR(buf.ust_mode))
|
|
return OS_TYPE_CHARDEV;
|
|
else if (S_ISBLK(buf.ust_mode))
|
|
return OS_TYPE_BLOCKDEV;
|
|
else if (S_ISFIFO(buf.ust_mode))
|
|
return OS_TYPE_FIFO;
|
|
else if (S_ISSOCK(buf.ust_mode))
|
|
return OS_TYPE_SOCK;
|
|
else return OS_TYPE_FILE;
|
|
}
|
|
|
|
int os_file_mode(const char *file, struct openflags *mode_out)
|
|
{
|
|
int err;
|
|
|
|
*mode_out = OPENFLAGS();
|
|
|
|
err = access(file, W_OK);
|
|
if (err && (errno != EACCES))
|
|
return -errno;
|
|
else if (!err)
|
|
*mode_out = of_write(*mode_out);
|
|
|
|
err = access(file, R_OK);
|
|
if (err && (errno != EACCES))
|
|
return -errno;
|
|
else if (!err)
|
|
*mode_out = of_read(*mode_out);
|
|
|
|
return err;
|
|
}
|
|
|
|
int os_open_file(const char *file, struct openflags flags, int mode)
|
|
{
|
|
int fd, err, f = 0;
|
|
|
|
if (flags.r && flags.w)
|
|
f = O_RDWR;
|
|
else if (flags.r)
|
|
f = O_RDONLY;
|
|
else if (flags.w)
|
|
f = O_WRONLY;
|
|
else f = 0;
|
|
|
|
if (flags.s)
|
|
f |= O_SYNC;
|
|
if (flags.c)
|
|
f |= O_CREAT;
|
|
if (flags.t)
|
|
f |= O_TRUNC;
|
|
if (flags.e)
|
|
f |= O_EXCL;
|
|
if (flags.a)
|
|
f |= O_APPEND;
|
|
|
|
fd = open64(file, f, mode);
|
|
if (fd < 0)
|
|
return -errno;
|
|
|
|
if (flags.cl && fcntl(fd, F_SETFD, 1)) {
|
|
err = -errno;
|
|
close(fd);
|
|
return err;
|
|
}
|
|
|
|
return fd;
|
|
}
|
|
|
|
int os_connect_socket(const char *name)
|
|
{
|
|
struct sockaddr_un sock;
|
|
int fd, err;
|
|
|
|
sock.sun_family = AF_UNIX;
|
|
snprintf(sock.sun_path, sizeof(sock.sun_path), "%s", name);
|
|
|
|
fd = socket(AF_UNIX, SOCK_STREAM, 0);
|
|
if (fd < 0) {
|
|
err = -errno;
|
|
goto out;
|
|
}
|
|
|
|
err = connect(fd, (struct sockaddr *) &sock, sizeof(sock));
|
|
if (err) {
|
|
err = -errno;
|
|
goto out_close;
|
|
}
|
|
|
|
return fd;
|
|
|
|
out_close:
|
|
close(fd);
|
|
out:
|
|
return err;
|
|
}
|
|
|
|
void os_close_file(int fd)
|
|
{
|
|
close(fd);
|
|
}
|
|
|
|
int os_seek_file(int fd, unsigned long long offset)
|
|
{
|
|
unsigned long long actual;
|
|
|
|
actual = lseek64(fd, offset, SEEK_SET);
|
|
if (actual != offset)
|
|
return -errno;
|
|
return 0;
|
|
}
|
|
|
|
int os_read_file(int fd, void *buf, int len)
|
|
{
|
|
int n = read(fd, buf, len);
|
|
|
|
if (n < 0)
|
|
return -errno;
|
|
return n;
|
|
}
|
|
|
|
int os_write_file(int fd, const void *buf, int len)
|
|
{
|
|
int n = write(fd, (void *) buf, len);
|
|
|
|
if (n < 0)
|
|
return -errno;
|
|
return n;
|
|
}
|
|
|
|
int os_file_size(const char *file, unsigned long long *size_out)
|
|
{
|
|
struct uml_stat buf;
|
|
int err;
|
|
|
|
err = os_stat_file(file, &buf);
|
|
if (err < 0) {
|
|
printk(UM_KERN_ERR "Couldn't stat \"%s\" : err = %d\n", file,
|
|
-err);
|
|
return err;
|
|
}
|
|
|
|
if (S_ISBLK(buf.ust_mode)) {
|
|
int fd;
|
|
long blocks;
|
|
|
|
fd = open(file, O_RDONLY, 0);
|
|
if (fd < 0) {
|
|
err = -errno;
|
|
printk(UM_KERN_ERR "Couldn't open \"%s\", "
|
|
"errno = %d\n", file, errno);
|
|
return err;
|
|
}
|
|
if (ioctl(fd, BLKGETSIZE, &blocks) < 0) {
|
|
err = -errno;
|
|
printk(UM_KERN_ERR "Couldn't get the block size of "
|
|
"\"%s\", errno = %d\n", file, errno);
|
|
close(fd);
|
|
return err;
|
|
}
|
|
*size_out = ((long long) blocks) * 512;
|
|
close(fd);
|
|
}
|
|
else *size_out = buf.ust_size;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int os_file_modtime(const char *file, unsigned long *modtime)
|
|
{
|
|
struct uml_stat buf;
|
|
int err;
|
|
|
|
err = os_stat_file(file, &buf);
|
|
if (err < 0) {
|
|
printk(UM_KERN_ERR "Couldn't stat \"%s\" : err = %d\n", file,
|
|
-err);
|
|
return err;
|
|
}
|
|
|
|
*modtime = buf.ust_mtime;
|
|
return 0;
|
|
}
|
|
|
|
int os_set_exec_close(int fd)
|
|
{
|
|
int err;
|
|
|
|
CATCH_EINTR(err = fcntl(fd, F_SETFD, FD_CLOEXEC));
|
|
|
|
if (err < 0)
|
|
return -errno;
|
|
return err;
|
|
}
|
|
|
|
int os_pipe(int *fds, int stream, int close_on_exec)
|
|
{
|
|
int err, type = stream ? SOCK_STREAM : SOCK_DGRAM;
|
|
|
|
err = socketpair(AF_UNIX, type, 0, fds);
|
|
if (err < 0)
|
|
return -errno;
|
|
|
|
if (!close_on_exec)
|
|
return 0;
|
|
|
|
err = os_set_exec_close(fds[0]);
|
|
if (err < 0)
|
|
goto error;
|
|
|
|
err = os_set_exec_close(fds[1]);
|
|
if (err < 0)
|
|
goto error;
|
|
|
|
return 0;
|
|
|
|
error:
|
|
printk(UM_KERN_ERR "os_pipe : Setting FD_CLOEXEC failed, err = %d\n",
|
|
-err);
|
|
close(fds[1]);
|
|
close(fds[0]);
|
|
return err;
|
|
}
|
|
|
|
int os_set_fd_async(int fd)
|
|
{
|
|
int err, flags;
|
|
|
|
flags = fcntl(fd, F_GETFL);
|
|
if (flags < 0)
|
|
return -errno;
|
|
|
|
flags |= O_ASYNC | O_NONBLOCK;
|
|
if (fcntl(fd, F_SETFL, flags) < 0) {
|
|
err = -errno;
|
|
printk(UM_KERN_ERR "os_set_fd_async : failed to set O_ASYNC "
|
|
"and O_NONBLOCK on fd # %d, errno = %d\n", fd, errno);
|
|
return err;
|
|
}
|
|
|
|
if ((fcntl(fd, F_SETSIG, SIGIO) < 0) ||
|
|
(fcntl(fd, F_SETOWN, os_getpid()) < 0)) {
|
|
err = -errno;
|
|
printk(UM_KERN_ERR "os_set_fd_async : Failed to fcntl F_SETOWN "
|
|
"(or F_SETSIG) fd %d, errno = %d\n", fd, errno);
|
|
return err;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int os_clear_fd_async(int fd)
|
|
{
|
|
int flags;
|
|
|
|
flags = fcntl(fd, F_GETFL);
|
|
if (flags < 0)
|
|
return -errno;
|
|
|
|
flags &= ~(O_ASYNC | O_NONBLOCK);
|
|
if (fcntl(fd, F_SETFL, flags) < 0)
|
|
return -errno;
|
|
return 0;
|
|
}
|
|
|
|
int os_set_fd_block(int fd, int blocking)
|
|
{
|
|
int flags;
|
|
|
|
flags = fcntl(fd, F_GETFL);
|
|
if (flags < 0)
|
|
return -errno;
|
|
|
|
if (blocking)
|
|
flags &= ~O_NONBLOCK;
|
|
else
|
|
flags |= O_NONBLOCK;
|
|
|
|
if (fcntl(fd, F_SETFL, flags) < 0)
|
|
return -errno;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int os_accept_connection(int fd)
|
|
{
|
|
int new;
|
|
|
|
new = accept(fd, NULL, 0);
|
|
if (new < 0)
|
|
return -errno;
|
|
return new;
|
|
}
|
|
|
|
#ifndef SHUT_RD
|
|
#define SHUT_RD 0
|
|
#endif
|
|
|
|
#ifndef SHUT_WR
|
|
#define SHUT_WR 1
|
|
#endif
|
|
|
|
#ifndef SHUT_RDWR
|
|
#define SHUT_RDWR 2
|
|
#endif
|
|
|
|
int os_shutdown_socket(int fd, int r, int w)
|
|
{
|
|
int what, err;
|
|
|
|
if (r && w)
|
|
what = SHUT_RDWR;
|
|
else if (r)
|
|
what = SHUT_RD;
|
|
else if (w)
|
|
what = SHUT_WR;
|
|
else
|
|
return -EINVAL;
|
|
|
|
err = shutdown(fd, what);
|
|
if (err < 0)
|
|
return -errno;
|
|
return 0;
|
|
}
|
|
|
|
int os_rcv_fd(int fd, int *helper_pid_out)
|
|
{
|
|
int new, n;
|
|
char buf[CMSG_SPACE(sizeof(new))];
|
|
struct msghdr msg;
|
|
struct cmsghdr *cmsg;
|
|
struct iovec iov;
|
|
|
|
msg.msg_name = NULL;
|
|
msg.msg_namelen = 0;
|
|
iov = ((struct iovec) { .iov_base = helper_pid_out,
|
|
.iov_len = sizeof(*helper_pid_out) });
|
|
msg.msg_iov = &iov;
|
|
msg.msg_iovlen = 1;
|
|
msg.msg_control = buf;
|
|
msg.msg_controllen = sizeof(buf);
|
|
msg.msg_flags = 0;
|
|
|
|
n = recvmsg(fd, &msg, 0);
|
|
if (n < 0)
|
|
return -errno;
|
|
else if (n != iov.iov_len)
|
|
*helper_pid_out = -1;
|
|
|
|
cmsg = CMSG_FIRSTHDR(&msg);
|
|
if (cmsg == NULL) {
|
|
printk(UM_KERN_ERR "rcv_fd didn't receive anything, "
|
|
"error = %d\n", errno);
|
|
return -1;
|
|
}
|
|
if ((cmsg->cmsg_level != SOL_SOCKET) ||
|
|
(cmsg->cmsg_type != SCM_RIGHTS)) {
|
|
printk(UM_KERN_ERR "rcv_fd didn't receive a descriptor\n");
|
|
return -1;
|
|
}
|
|
|
|
new = ((int *) CMSG_DATA(cmsg))[0];
|
|
return new;
|
|
}
|
|
|
|
int os_create_unix_socket(const char *file, int len, int close_on_exec)
|
|
{
|
|
struct sockaddr_un addr;
|
|
int sock, err;
|
|
|
|
sock = socket(PF_UNIX, SOCK_DGRAM, 0);
|
|
if (sock < 0)
|
|
return -errno;
|
|
|
|
if (close_on_exec) {
|
|
err = os_set_exec_close(sock);
|
|
if (err < 0)
|
|
printk(UM_KERN_ERR "create_unix_socket : "
|
|
"close_on_exec failed, err = %d", -err);
|
|
}
|
|
|
|
addr.sun_family = AF_UNIX;
|
|
|
|
snprintf(addr.sun_path, len, "%s", file);
|
|
|
|
err = bind(sock, (struct sockaddr *) &addr, sizeof(addr));
|
|
if (err < 0)
|
|
return -errno;
|
|
|
|
return sock;
|
|
}
|
|
|
|
void os_flush_stdout(void)
|
|
{
|
|
fflush(stdout);
|
|
}
|
|
|
|
int os_lock_file(int fd, int excl)
|
|
{
|
|
int type = excl ? F_WRLCK : F_RDLCK;
|
|
struct flock lock = ((struct flock) { .l_type = type,
|
|
.l_whence = SEEK_SET,
|
|
.l_start = 0,
|
|
.l_len = 0 } );
|
|
int err, save;
|
|
|
|
err = fcntl(fd, F_SETLK, &lock);
|
|
if (!err)
|
|
goto out;
|
|
|
|
save = -errno;
|
|
err = fcntl(fd, F_GETLK, &lock);
|
|
if (err) {
|
|
err = -errno;
|
|
goto out;
|
|
}
|
|
|
|
printk(UM_KERN_ERR "F_SETLK failed, file already locked by pid %d\n",
|
|
lock.l_pid);
|
|
err = save;
|
|
out:
|
|
return err;
|
|
}
|