C++ (Cpp) rpc_show_tasks Examples

Example #1

int
proc_dodebug(ctl_table *table, int write, struct file *file,
				void *buffer, size_t *lenp)
{
	char		tmpbuf[20], *p, c;
	unsigned int	value;
	int		left, len;

	if ((file->f_pos && !write) || !*lenp) {
		*lenp = 0;
		return 0;
	}

	left = *lenp;

	if (write) {
		if (!access_ok(VERIFY_READ, buffer, left))
			return -EFAULT;
		p = (char *) buffer;
#if LINUX_VERSION_CODE >= 0x020100
		while (left && __get_user(c, p) >= 0 && isspace(c))
			left--, p++;
#else
		while (left && (c = get_fs_byte(p)) >= 0 && isspace(c))
			left--, p++;
#endif
		if (!left)
			goto done;

		if (left > sizeof(tmpbuf) - 1)
			return -EINVAL;
		copy_from_user(tmpbuf, p, left);
		tmpbuf[left] = '\0';

		for (p = tmpbuf, value = 0; '0' <= *p && *p <= '9'; p++, left--)
			value = 10 * value + (*p - '0');
		if (*p && !isspace(*p))
			return -EINVAL;
		while (left && isspace(*p))
			left--, p++;
		*(unsigned int *) table->data = value;
		/* Display the RPC tasks on writing to rpc_debug */
		if (table->ctl_name == CTL_RPCDEBUG) {
			rpc_show_tasks();
		}
	} else {
		if (!access_ok(VERIFY_WRITE, buffer, left))
			return -EFAULT;
		len = sprintf(tmpbuf, "%d", *(unsigned int *) table->data);
		if (len > left)
			len = left;
		copy_to_user(buffer, tmpbuf, len);
		if ((left -= len) > 0) {
			put_user('\n', (char *)buffer + len);
			left--;
		}
	}

done:
	*lenp -= left;
	file->f_pos += *lenp;
	return 0;
}

Example #2

File: sysctl.c Project: gnensis/linux-2.6.15

static int
proc_dodebug(ctl_table *table, int write, struct file *file,
				void __user *buffer, size_t *lenp, loff_t *ppos)
{
	char		tmpbuf[20], c, *s;
	char __user *p;
	unsigned int	value;
	size_t		left, len;

	if ((*ppos && !write) || !*lenp) {
		*lenp = 0;
		return 0;
	}

	left = *lenp;

	if (write) {
		if (!access_ok(VERIFY_READ, buffer, left))
			return -EFAULT;
		p = buffer;
		while (left && __get_user(c, p) >= 0 && isspace(c))
			left--, p++;
		if (!left)
			goto done;

		if (left > sizeof(tmpbuf) - 1)
			return -EINVAL;
		if (copy_from_user(tmpbuf, p, left))
			return -EFAULT;
		tmpbuf[left] = '\0';

		for (s = tmpbuf, value = 0; '0' <= *s && *s <= '9'; s++, left--)
			value = 10 * value + (*s - '0');
		if (*s && !isspace(*s))
			return -EINVAL;
		while (left && isspace(*s))
			left--, s++;
		*(unsigned int *) table->data = value;
		/* Display the RPC tasks on writing to rpc_debug */
		if (table->ctl_name == CTL_RPCDEBUG) {
			rpc_show_tasks();
		}
	} else {
		if (!access_ok(VERIFY_WRITE, buffer, left))
			return -EFAULT;
		len = sprintf(tmpbuf, "%d", *(unsigned int *) table->data);
		if (len > left)
			len = left;
		if (__copy_to_user(buffer, tmpbuf, len))
			return -EFAULT;
		if ((left -= len) > 0) {
			if (put_user('\n', (char __user *)buffer + len))
				return -EFAULT;
			left--;
		}
	}

done:
	*lenp -= left;
	*ppos += *lenp;
	return 0;
}

Example #3

File: sysctl.c Project: AshishNamdev/linux

static int
proc_dodebug(struct ctl_table *table, int write,
				void __user *buffer, size_t *lenp, loff_t *ppos)
{
	char		tmpbuf[20], c, *s = NULL;
	char __user *p;
	unsigned int	value;
	size_t		left, len;

	if ((*ppos && !write) || !*lenp) {
		*lenp = 0;
		return 0;
	}

	left = *lenp;

	if (write) {
		if (!access_ok(VERIFY_READ, buffer, left))
			return -EFAULT;
		p = buffer;
		while (left && __get_user(c, p) >= 0 && isspace(c))
			left--, p++;
		if (!left)
			goto done;

		if (left > sizeof(tmpbuf) - 1)
			return -EINVAL;
		if (copy_from_user(tmpbuf, p, left))
			return -EFAULT;
		tmpbuf[left] = '\0';

		value = simple_strtol(tmpbuf, &s, 0);
		if (s) {
			left -= (s - tmpbuf);
			if (left && !isspace(*s))
				return -EINVAL;
			while (left && isspace(*s))
				left--, s++;
		} else
			left = 0;
		*(unsigned int *) table->data = value;
		/* Display the RPC tasks on writing to rpc_debug */
		if (strcmp(table->procname, "rpc_debug") == 0)
			rpc_show_tasks(&init_net);
	} else {
		len = sprintf(tmpbuf, "0x%04x", *(unsigned int *) table->data);
		if (len > left)
			len = left;
		if (copy_to_user(buffer, tmpbuf, len))
			return -EFAULT;
		if ((left -= len) > 0) {
			if (put_user('\n', (char __user *)buffer + len))
				return -EFAULT;
			left--;
		}
	}

done:
	*lenp -= left;
	*ppos += *lenp;
	return 0;
}