| 1603 |
run as follows. |
run as follows. |
| 1604 |
|
|
| 1605 |
# exec 100<>/proc/ccs/domain_policy |
# exec 100<>/proc/ccs/domain_policy |
| 1606 |
# echo select $$ >&100 |
# echo select pid=$$ >&100 |
| 1607 |
# while read -u 100; do echo $REPLY; done |
# while read -u 100; do echo $REPLY; done |
| 1608 |
|
|
| 1609 |
If a domain is once selected by PID, reading /proc/ccs/domain_policy will |
If a domain is once selected by PID, reading /proc/ccs/domain_policy will |
| 1616 |
But to implement "Allow selecting a domain by PID" feature, I disabled |
But to implement "Allow selecting a domain by PID" feature, I disabled |
| 1617 |
concurrent read()/write() because the feature need to modify read buffer |
concurrent read()/write() because the feature need to modify read buffer |
| 1618 |
while writing. |
while writing. |
| 1619 |
|
|
| 1620 |
|
Fix 2008/10/01 |
| 1621 |
|
|
| 1622 |
|
@ Add retry counter into /proc/ccs/query . |
| 1623 |
|
|
| 1624 |
|
To be able to handle some of queries from /proc/ccs/query without user's |
| 1625 |
|
interaction, I added retry counter for avoiding infinite loop caused by |
| 1626 |
|
"try again" response. |
| 1627 |
|
|
| 1628 |
|
Fix 2008/10/07 |
| 1629 |
|
|
| 1630 |
|
@ Don't transit to new domain until do_execve() succeeds. |
| 1631 |
|
|
| 1632 |
|
Until now, a process's domain was updated to new domain which the process |
| 1633 |
|
will belongs to before do_execve() succeeds so that the kernel can do |
| 1634 |
|
permission checks for interpreters and environment variables based on |
| 1635 |
|
new domain. But this caused a subtle problem when other process sends |
| 1636 |
|
signals to the process, for the process returns to old domain if |
| 1637 |
|
do_execve() failed. |
| 1638 |
|
|
| 1639 |
|
So, I modified to pass new domain to functions so that I can avoid |
| 1640 |
|
modifying a process's domain before do_execve() succeeds. |
| 1641 |
|
|
| 1642 |
|
@ Use old task state for audit logs. |
| 1643 |
|
|
| 1644 |
|
Until now, audit logs were generated using the task state after |
| 1645 |
|
processing "; set task.state" part. But to generate accurate logs, |
| 1646 |
|
I modified to save the task state before processing "; set task.state" |
| 1647 |
|
part and use the saved state for audit logs. |
| 1648 |
|
|
| 1649 |
|
@ Use a structure for passing parameters. |
| 1650 |
|
|
| 1651 |
|
As the number of parameters is increasing, I modified to use a structure |
| 1652 |
|
for passing parameters. |
| 1653 |
|
|
| 1654 |
|
Fix 2008/10/11 |
| 1655 |
|
|
| 1656 |
|
@ Remove domain_acl_lock mutex. |
| 1657 |
|
|
| 1658 |
|
I noticed that I don't need to keep all functions that modify an ACL of |
| 1659 |
|
a domain mutually exclusive. Since each functions handles different type |
| 1660 |
|
of ACL, locking is needed only when they append an ACL to a domain. |
| 1661 |
|
So, I modified to use local locks. |
| 1662 |
|
|
| 1663 |
|
Fix 2008/10/14 |
| 1664 |
|
|
| 1665 |
|
@ Fix ccs_check_condition() bug. |
| 1666 |
|
|
| 1667 |
|
Due to a bug in ccs_check_condition(), it was impossible to use |
| 1668 |
|
task.state[0] task.state[1] task.state[2] inside condition part |
| 1669 |
|
if the ACL does not treat a pathname. For example, an ACL like |
| 1670 |
|
|
| 1671 |
|
allow_network TCP connect @HTTP_SERVERS 80 if task.state[0]=100 |
| 1672 |
|
|
| 1673 |
|
didn't work. |
| 1674 |
|
|
| 1675 |
|
Fix 2008/10/15 |
| 1676 |
|
|
| 1677 |
|
@ Show process information in /proc/ccs/.process_status . |
| 1678 |
|
|
| 1679 |
|
To be able to determine a process's type, I added a command "info PID" |
| 1680 |
|
which returns process information of the specified PID in |
| 1681 |
|
"PID manager=\* execute_handler=\* state[0]=\$ state[1]=\$ state[2]=\$" |
| 1682 |
|
format. |
| 1683 |
|
|
| 1684 |
|
Fix 2008/10/20 |
| 1685 |
|
|
| 1686 |
|
@ Use rcu_dereference() when walking the list. |
| 1687 |
|
|
| 1688 |
|
I was using "dependency ordering" for appending an element to a list |
| 1689 |
|
without asking the reader to take a lock. But "dependency ordering" |
| 1690 |
|
is not respected by DEC Alpha or by some aggressive value-speculation |
| 1691 |
|
compiler optimizations. |
| 1692 |
|
|
| 1693 |
|
On such environment, use of "dependency ordering" can lead to system |
| 1694 |
|
crash because the reader might read uninitialized value of newly |
| 1695 |
|
appended element. |
| 1696 |
|
|
| 1697 |
|
To prevent the reader from reading uninitialized value of newly appended |
| 1698 |
|
element, I inserted rcu_dereference() when walking the list. |
TOMOYO
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