C++ (Cpp) fs_may_remount_ro示例

示例#1

文件： super.c 项目： lithoxs/elks

static int do_remount_sb(register struct super_block *sb, int flags,
			 char *data)
{
    int retval;
    register struct super_operations *sop = sb->s_op;

    if (!(flags & MS_RDONLY) && sb->s_dev)
	return -EACCES;

#if 0
    flags |= MS_RDONLY;
#endif

    /* If we are remounting RDONLY, make sure there are no rw files open */
    if ((flags & MS_RDONLY) && !(sb->s_flags & MS_RDONLY))
	if (!fs_may_remount_ro(sb->s_dev))
	    return -EBUSY;
    if (sop && sop->remount_fs) {
	retval = sop->remount_fs(sb, &flags, data);
	if (retval)
	    return retval;
    }
    sb->s_flags = (unsigned short int)
		((sb->s_flags & ~MS_RMT_MASK) | (flags & MS_RMT_MASK));
    return 0;
}

示例#2

文件： super.c 项目： chinnyannieb/empeg-hijack

static int do_remount_sb(struct super_block *sb, int flags, char *data)
{
	int retval;
	struct vfsmount *vfsmnt;
	
	/*
	 * Invalidate the inodes, as some mount options may be changed.
	 * N.B. If we are changing media, we should check the return
	 * from invalidate_inodes ... can't allow _any_ open files.
	 */
	invalidate_inodes(sb);

	if (!(flags & MS_RDONLY) && sb->s_dev && is_read_only(sb->s_dev))
		return -EACCES;
		/*flags |= MS_RDONLY;*/
	/* If we are remounting RDONLY, make sure there are no rw files open */
	if ((flags & MS_RDONLY) && !(sb->s_flags & MS_RDONLY))
		if (!fs_may_remount_ro(sb))
			return -EBUSY;
	if (sb->s_op && sb->s_op->remount_fs) {
		retval = sb->s_op->remount_fs(sb, &flags, data);
		if (retval)
			return retval;
	}
	sb->s_flags = (sb->s_flags & ~MS_RMT_MASK) | (flags & MS_RMT_MASK);
	vfsmnt = lookup_vfsmnt(sb->s_dev);
	if (vfsmnt)
		vfsmnt->mnt_flags = sb->s_flags;
	return 0;
}

示例#3

文件： super.c 项目： drewt/Telos

/*
 * Alters the mount flags of a mounted file system. Only the mount point
 * is used as a reference - file system type and the device are ignored.
 * FS-specific mount options can't be altered by remounting.
 */
static int do_remount_sb(struct super_block *sb, int flags, const void *data)
{
	int error;
	
	// If we are remounting RDONLY, make sure there are no rw files open
	if ((flags & MS_RDONLY) && !(sb->s_flags & MS_RDONLY))
		if (!fs_may_remount_ro(sb->s_dev))
			return -EBUSY;
	if (sb->s_op && sb->s_op->remount_fs) {
		error = sb->s_op->remount_fs(sb, &flags, data);
		if (error)
			return error;
	}
	sb->s_flags = (sb->s_flags & ~MS_RMT_MASK) |
		(flags & MS_RMT_MASK);
	return 0;
}

示例#4

static int do_remount_sb(struct super_block *sb, int flags, char *data)
{
	int retval;
	struct vfsmount *vfsmnt;
	
	if (!(flags & MS_RDONLY) && sb->s_dev && is_read_only(sb->s_dev))
		return -EACCES;
		/*flags |= MS_RDONLY;*/
	/* If we are remounting RDONLY, make sure there are no rw files open */
	if ((flags & MS_RDONLY) && !(sb->s_flags & MS_RDONLY))
		if (!fs_may_remount_ro(sb->s_dev))
			return -EBUSY;
	if (sb->s_op && sb->s_op->remount_fs) {
		retval = sb->s_op->remount_fs(sb, &flags, data);
		if (retval)
			return retval;
	}
	sb->s_flags = (sb->s_flags & ~MS_RMT_MASK) | (flags & MS_RMT_MASK);
	vfsmnt = lookup_vfsmnt(sb->s_dev);
	if (vfsmnt)
		vfsmnt->mnt_flags = sb->s_flags;
	return 0;
}