Hi,
How can I delete an existing filter? Is it possible?
I tried different combinations of tc commands but, while
manage to delete an existing qdisc or class, I wasn''t able
to find a way to delete an existing filter.
The tc man page doesn''t even list the del command in the
synopsis.
tc filter [ add | change | replace ] \
dev DEV [ parent qdisc-id | root ] \
protocol protocol \
prio priority \
filtertype [ filtertype specific parameters ] \
flowid flow-id
While tc man pages list tc-filter in the references I
wasn''t able to find it.
The tc "filter help output" shows del among the available
commands but doesn''t include a synopsis for it.
Thanks in advance.
Best regards.
--
Value your freedom, or you will lose it, teaches history.
``Don''t bother us with politics,'''' respond those who
don''t
want to learn.
-- Richard M. Stallman
http://www.gnu.org/philosophy/linux-gnu-freedom.html
* ncrfgs <20041130162601.GB1470@ncrfgs3.ncrfgs> 2004-11-30 17:26> Hi, > > How can I delete an existing filter? Is it possible?You must at least provide the following: dev parent (qdisc or class) prio kind (filter type) handle The kernel will then lookup the device, find the qdisc or class according to your parent, lookup the filter ops according to the kind and prio and then calls get() in the filter to look it up. The get() is dependant on the filter type and thus deleting may vary from filter to filter. handle == 0 will destroy the whole filter tree example 1: (destroying the whole tree) # tc filter add dev eth0 parent 10:0 prio 10 protocol all u32 match \ ip tos 1 0 flowid 10:12 # tc filter list dev eth0 parent 10:0 filter protocol all pref 10 u32 filter protocol all pref 10 u32 fh 800: ht divisor 1 filter protocol all pref 10 u32 fh 800::800 order 2048 key ht 800 bkt 0 flowid 10:12 match 00000000/00000000 at 0 # tc filter del dev eth0 parent 10:0 prio 10 u32 # tc filter list dev eth0 parent 10:0 # example 2: (destroying a single filter) # tc filter add dev eth0 parent 10:0 prio 10 protocol all u32 match \ ip tos 1 0 flowid 10:12 # tc filter add dev eth0 parent 10:0 prio 10 protocol all u32 match \ ip tos 1 0 flowid 10:12 # tc filter list dev eth0 parent 10:0 filter protocol all pref 10 u32 filter protocol all pref 10 u32 fh 800: ht divisor 1 filter protocol all pref 10 u32 fh 800::800 order 2048 key ht 800 bkt 0 flowid 10:12 match 00000000/00000000 at 0 filter protocol all pref 10 u32 fh 800::801 order 2049 key ht 800 bkt 0 flowid 10:12 match 00000000/00000000 at 0 # tc filter del dev eth0 parent 10:0 prio 10 handle 800::801 u32 # tc filter list dev eth0 parent 10:0 filter protocol all pref 10 u32 filter protocol all pref 10 u32 fh 800: ht divisor 1 filter protocol all pref 10 u32 fh 800::800 order 2048 key ht 800 bkt 0 flowid 10:12 match 00000000/00000000 at 0 # rule of thumb: - deleting a filter with handle NOT specified deletes whole filter tree - deleting a filter with handle specified deletes only the filter with the given handle This does not apply to all filters though. _______________________________________________ LARTC mailing list / LARTC@mailman.ds9a.nl http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/