static int dump_misc(struct parasite_dump_misc *args)
{
args->brk = sys_brk(0);
args->blocked = thread_leader->sig_blocked;
args->pid = sys_getpid();
args->sid = sys_getsid();
args->pgid = sys_getpgid(0);
args->tls = arch_get_tls();
args->umask = sys_umask(0);
sys_umask(args->umask); /* never fails */
return 0;
}
/* Note: it is necessary to treat mask as an unsigned int,
* with the corresponding cast to a signed int to insure that the
* proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
* and the register representation of a signed int (msr in 64-bit mode) is performed.
*/
asmlinkage long compat_sys_umask(u32 mask)
{
return sys_umask((int)mask);
}
int devtmpfs_create_node(struct device *dev)
{
const char *tmp = NULL;
const char *nodename;
const struct cred *curr_cred;
struct user_beancounter *curr_ub;
mode_t mode = 0;
struct nameidata nd;
struct dentry *dentry;
int err;
struct vfsmount *dev_mnt = ve_devmnt();
if (!dev_mnt)
return 0;
nodename = device_get_devnode(dev, &mode, &tmp);
if (!nodename)
return -ENOMEM;
if (mode == 0)
mode = 0600;
if (is_blockdev(dev))
mode |= S_IFBLK;
else
mode |= S_IFCHR;
curr_ub = set_exec_ub(&ub0);
curr_cred = override_creds(&init_cred);
err = vfs_path_lookup(dev_mnt->mnt_root, dev_mnt,
nodename, LOOKUP_PARENT, &nd);
if (err == -ENOENT) {
/* create missing parent directories */
create_path(nodename);
err = vfs_path_lookup(dev_mnt->mnt_root, dev_mnt,
nodename, LOOKUP_PARENT, &nd);
if (err)
goto out;
}
dentry = lookup_create(&nd, 0);
if (!IS_ERR(dentry)) {
int umask;
umask = sys_umask(0000);
err = vfs_mknod(nd.path.dentry->d_inode,
dentry, mode, dev->devt);
sys_umask(umask);
/* mark as kernel created inode */
if (!err)
dentry->d_inode->i_private = &dev_mnt;
dput(dentry);
} else {
err = PTR_ERR(dentry);
}
mutex_unlock(&nd.path.dentry->d_inode->i_mutex);
path_put(&nd.path);
out:
kfree(tmp);
revert_creds(curr_cred);
(void)set_exec_ub(curr_ub);
return err;
}
