Modules | |
Blackhole | |
Class Based Queueing (CBQ) | |
Differentiated Services Marker (DSMARK) | |
Packet/Bytes FIFO (pfifo/bfifo) | |
The FIFO qdisc comes in two flavours: | |
Hierachical Token Bucket (HTB) | |
Network Emulator | |
For further documentation see http://linux-net.osdl.org/index.php/Netem. | |
(Fast) Prio | |
Random Early Detection (RED) | |
Stochastic Fairness Queueing (SFQ) | |
Token Bucket Filter (TBF) | |
Variables | |
struct nl_object_ops | qdisc_obj_ops |
QDisc Addition | |
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int | rtnl_qdisc_build_add_request (struct rtnl_qdisc *qdisc, int flags, struct nl_msg **result) |
Build a netlink message to add a new qdisc. | |
int | rtnl_qdisc_add (struct nl_sock *sk, struct rtnl_qdisc *qdisc, int flags) |
Add a new qdisc. | |
QDisc Modification | |
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int | rtnl_qdisc_build_change_request (struct rtnl_qdisc *qdisc, struct rtnl_qdisc *new, struct nl_msg **result) |
Build a netlink message to change attributes of a existing qdisc. | |
int | rtnl_qdisc_change (struct nl_sock *sk, struct rtnl_qdisc *qdisc, struct rtnl_qdisc *new) |
Change attributes of a qdisc. | |
QDisc Deletion | |
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int | rtnl_qdisc_build_delete_request (struct rtnl_qdisc *qdisc, struct nl_msg **result) |
Build a netlink request message to delete a qdisc. | |
int | rtnl_qdisc_delete (struct nl_sock *sk, struct rtnl_qdisc *qdisc) |
Delete a qdisc. | |
Qdisc Cache Management | |
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int | rtnl_qdisc_alloc_cache (struct nl_sock *sk, struct nl_cache **result) |
Build a qdisc cache including all qdiscs currently configured in the kernel. | |
struct rtnl_qdisc * | rtnl_qdisc_get_by_parent (struct nl_cache *cache, int ifindex, uint32_t parent) |
Look up qdisc by its parent in the provided cache. | |
struct rtnl_qdisc * | rtnl_qdisc_get (struct nl_cache *cache, int ifindex, uint32_t handle) |
Look up qdisc by its handle in the provided cache. | |
Allocation/Freeing | |
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struct rtnl_qdisc * | rtnl_qdisc_alloc (void) |
void | rtnl_qdisc_put (struct rtnl_qdisc *qdisc) |
Iterators | |
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void | rtnl_qdisc_foreach_child (struct rtnl_qdisc *qdisc, struct nl_cache *cache, void(*cb)(struct nl_object *, void *), void *arg) |
Call a callback for each child class of a qdisc. | |
void | rtnl_qdisc_foreach_cls (struct rtnl_qdisc *qdisc, struct nl_cache *cache, void(*cb)(struct nl_object *, void *), void *arg) |
Call a callback for each filter attached to the qdisc. |
TC_H_ROOT:
root qdisc (directly attached to the device)TC_H_INGRESS:
ingress qdisc (directly attached to the device)TC_H_UNSPEC:
unspecified qdisc (no reference)// Allocate a new empty qdisc to be filled out struct rtnl_qdisc *qdisc = rtnl_qdisc_alloc(); // ... specify the kind of the Qdisc rtnl_qdisc_set_kind(qdisc, "pfifo"); // Specify the device the qdisc should be attached to rtnl_qdisc_set_ifindex(qdisc, ifindex); // ... specify the parent qdisc rtnl_qdisc_set_parent(qdisc, TC_H_ROOT); // Specifying the handle is not required but makes reidentifying easier // and may help to avoid adding a qdisc twice. rtnl_qdisc_set_handle(qdisc, 0x000A0000); // Now on to specify the qdisc specific options, see the relevant qdisc // modules for documentation, in this example we set the upper limit of // the packet fifo qdisc to 64 rtnl_qdisc_fifo_set_limit(qdisc, 64); rtnl_qdisc_add(handle, qdisc, NLM_R_REPLACE); // Free up the memory rtnl_qdisc_put(qdisc);
// Allocate a new empty qdisc to be filled out with the parameters // specifying the qdisc to be deleted. Alternatively a fully equiped // Qdisc object from a cache can be used. struct rtnl_qdisc *qdisc = rtnl_qdisc_alloc(); // The interface index of the device the qdisc is on and the parent handle // are the least required fields to be filled out. // Note: Specify TC_H_ROOT or TC_H_INGRESS as parent handle to delete the // root respectively root ingress qdisc. rtnl_qdisc_set_ifindex(qdisc, ifindex); rtnl_qdisc_set_parent(qdisc, parent_handle); // If required for identification, the handle can be specified as well. rtnl_qdisc_set_handle(qdisc, qdisc_handle); // Not required but maybe helpful as sanity check, the kind of the qdisc // can be specified to avoid mistakes. rtnl_qdisc_set_kind(qdisc, "pfifo"); // Finally delete the qdisc with rtnl_qdisc_delete(), alternatively // rtnl_qdisc_build_delete_request() can be invoked to generate an // appropritate netlink message to send out. rtnl_qdisc_delete(handle, qdisc); // Free up the memory rtnl_qdisc_put(qdisc);
int rtnl_qdisc_build_add_request | ( | struct rtnl_qdisc * | qdisc, | |
int | flags, | |||
struct nl_msg ** | result | |||
) |
Build a netlink message to add a new qdisc.
qdisc | qdisc to add | |
flags | additional netlink message flags | |
result | Pointer to store resulting message. |
Builds a new netlink message requesting an addition of a qdisc. The netlink message header isn't fully equipped with all relevant fields and must be sent out via nl_send_auto_complete() or supplemented as needed.
Common message flags used:
Definition at line 165 of file qdisc.c.
Referenced by rtnl_qdisc_add().
int rtnl_qdisc_add | ( | struct nl_sock * | sk, | |
struct rtnl_qdisc * | qdisc, | |||
int | flags | |||
) |
Add a new qdisc.
sk | Netlink socket. | |
qdisc | qdisc to delete | |
flags | additional netlink message flags |
Builds a netlink message by calling rtnl_qdisc_build_add_request(), sends the request to the kernel and waits for the ACK to be received and thus blocks until the request has been processed.
Common message flags used:
Definition at line 186 of file qdisc.c.
References nlmsg_free(), and rtnl_qdisc_build_add_request().
int rtnl_qdisc_build_change_request | ( | struct rtnl_qdisc * | qdisc, | |
struct rtnl_qdisc * | new, | |||
struct nl_msg ** | result | |||
) |
Build a netlink message to change attributes of a existing qdisc.
qdisc | qdisc to change | |
new | new qdisc attributes | |
result | Pointer to store resulting message. |
Builds a new netlink message requesting an change of qdisc attributes. The netlink message header isn't fully equipped with all relevant fields and must be sent out via nl_send_auto_complete() or supplemented as needed.
Definition at line 223 of file qdisc.c.
Referenced by rtnl_qdisc_change().
int rtnl_qdisc_change | ( | struct nl_sock * | sk, | |
struct rtnl_qdisc * | qdisc, | |||
struct rtnl_qdisc * | new | |||
) |
Change attributes of a qdisc.
sk | Netlink socket. | |
qdisc | qdisc to change | |
new | new qdisc attributes |
Builds a netlink message by calling rtnl_qdisc_build_change_request(), sends the request to the kernel and waits for the ACK to be received and thus blocks until the request has been processed.
Definition at line 242 of file qdisc.c.
References nlmsg_free(), and rtnl_qdisc_build_change_request().
int rtnl_qdisc_build_delete_request | ( | struct rtnl_qdisc * | qdisc, | |
struct nl_msg ** | result | |||
) |
Build a netlink request message to delete a qdisc.
qdisc | qdisc to delete | |
result | Pointer to store resulting message. |
Builds a new netlink message requesting a deletion of a qdisc. The netlink message header isn't fully equipped with all relevant fields and must thus be sent out via nl_send_auto_complete() or supplemented as needed.
Definition at line 278 of file qdisc.c.
References nlmsg_alloc_simple(), nlmsg_append(), and nlmsg_free().
Referenced by rtnl_qdisc_delete().
int rtnl_qdisc_delete | ( | struct nl_sock * | sk, | |
struct rtnl_qdisc * | qdisc | |||
) |
Delete a qdisc.
sk | Netlink socket. | |
qdisc | qdisc to delete |
Builds a netlink message by calling rtnl_qdisc_build_delete_request(), sends the request to the kernel and waits for the ACK to be received and thus blocks until the request has been processed.
Definition at line 316 of file qdisc.c.
References nlmsg_free(), and rtnl_qdisc_build_delete_request().
int rtnl_qdisc_alloc_cache | ( | struct nl_sock * | sk, | |
struct nl_cache ** | result | |||
) |
Build a qdisc cache including all qdiscs currently configured in the kernel.
sk | Netlink socket. | |
result | Pointer to store resulting message. |
Allocates a new cache, initializes it properly and updates it to include all qdiscs currently configured in the kernel.
struct rtnl_qdisc* rtnl_qdisc_get_by_parent | ( | struct nl_cache * | cache, | |
int | ifindex, | |||
uint32_t | parent | |||
) | [read] |
Look up qdisc by its parent in the provided cache.
cache | qdisc cache | |
ifindex | interface the qdisc is attached to | |
parent | parent handle |
Definition at line 362 of file qdisc.c.
References nl_object_get().
Referenced by rtnl_class_leaf_qdisc().
struct rtnl_qdisc* rtnl_qdisc_get | ( | struct nl_cache * | cache, | |
int | ifindex, | |||
uint32_t | handle | |||
) | [read] |
Look up qdisc by its handle in the provided cache.
cache | qdisc cache | |
ifindex | interface the qdisc is attached to | |
handle | qdisc handle |
Definition at line 387 of file qdisc.c.
References nl_object_get().
void rtnl_qdisc_foreach_child | ( | struct rtnl_qdisc * | qdisc, | |
struct nl_cache * | cache, | |||
void(*)(struct nl_object *, void *) | cb, | |||
void * | arg | |||
) |
Call a callback for each child class of a qdisc.
qdisc | the parent qdisc | |
cache | a class cache including all classes of the interface the specified qdisc is attached to | |
cb | callback function | |
arg | argument to be passed to callback function |
Definition at line 443 of file qdisc.c.
References nl_cache_foreach_filter(), rtnl_tc_set_ifindex(), rtnl_tc_set_kind(), rtnl_tc_set_parent(), and TC_CAST.
void rtnl_qdisc_foreach_cls | ( | struct rtnl_qdisc * | qdisc, | |
struct nl_cache * | cache, | |||
void(*)(struct nl_object *, void *) | cb, | |||
void * | arg | |||
) |
Call a callback for each filter attached to the qdisc.
qdisc | the parent qdisc | |
cache | a filter cache including at least all the filters attached to the specified qdisc | |
cb | callback function | |
arg | argument to be passed to callback function |
Definition at line 469 of file qdisc.c.
References nl_cache_foreach_filter(), rtnl_tc_set_ifindex(), and rtnl_tc_set_parent().
struct nl_object_ops qdisc_obj_ops |
{ .oo_name = "route/qdisc", .oo_size = sizeof(struct rtnl_qdisc), .oo_free_data = rtnl_tc_free_data, .oo_clone = rtnl_tc_clone, .oo_dump = { [NL_DUMP_LINE] = rtnl_tc_dump_line, [NL_DUMP_DETAILS] = rtnl_tc_dump_details, [NL_DUMP_STATS] = rtnl_tc_dump_stats, }, .oo_compare = rtnl_tc_compare, .oo_id_attrs = (TCA_ATTR_IFINDEX | TCA_ATTR_HANDLE), }