2015-10-07 06:52:21 +03:00
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/*
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* Copyright (c) 2015 FUJITSU LIMITED
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* Author: Yang Hongyang <yanghy@cn.fujitsu.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or
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* later. See the COPYING file in the top-level directory.
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*/
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2016-01-29 20:50:00 +03:00
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#include "qemu/osdep.h"
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2015-10-07 06:52:21 +03:00
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#include "net/filter.h"
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#include "net/queue.h"
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include/qemu/osdep.h: Don't include qapi/error.h
Commit 57cb38b included qapi/error.h into qemu/osdep.h to get the
Error typedef. Since then, we've moved to include qemu/osdep.h
everywhere. Its file comment explains: "To avoid getting into
possible circular include dependencies, this file should not include
any other QEMU headers, with the exceptions of config-host.h,
compiler.h, os-posix.h and os-win32.h, all of which are doing a
similar job to this file and are under similar constraints."
qapi/error.h doesn't do a similar job, and it doesn't adhere to
similar constraints: it includes qapi-types.h. That's in excess of
100KiB of crap most .c files don't actually need.
Add the typedef to qemu/typedefs.h, and include that instead of
qapi/error.h. Include qapi/error.h in .c files that need it and don't
get it now. Include qapi-types.h in qom/object.h for uint16List.
Update scripts/clean-includes accordingly. Update it further to match
reality: replace config.h by config-target.h, add sysemu/os-posix.h,
sysemu/os-win32.h. Update the list of includes in the qemu/osdep.h
comment quoted above similarly.
This reduces the number of objects depending on qapi/error.h from "all
of them" to less than a third. Unfortunately, the number depending on
qapi-types.h shrinks only a little. More work is needed for that one.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
[Fix compilation without the spice devel packages. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-03-14 11:01:28 +03:00
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#include "qapi/error.h"
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2015-10-07 06:52:21 +03:00
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#include "qemu/timer.h"
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#include "qemu/iov.h"
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2018-02-11 12:36:05 +03:00
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#include "qapi/qapi-builtin-visit.h"
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2015-10-07 06:52:21 +03:00
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#include "qapi/qmp/qerror.h"
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#include "qom/object.h"
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#define TYPE_FILTER_BUFFER "filter-buffer"
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#define FILTER_BUFFER(obj) \
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OBJECT_CHECK(FilterBufferState, (obj), TYPE_FILTER_BUFFER)
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typedef struct FilterBufferState {
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NetFilterState parent_obj;
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NetQueue *incoming_queue;
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uint32_t interval;
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QEMUTimer release_timer;
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} FilterBufferState;
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static void filter_buffer_flush(NetFilterState *nf)
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{
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FilterBufferState *s = FILTER_BUFFER(nf);
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if (!qemu_net_queue_flush(s->incoming_queue)) {
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/* Unable to empty the queue, purge remaining packets */
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qemu_net_queue_purge(s->incoming_queue, nf->netdev);
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}
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}
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static void filter_buffer_release_timer(void *opaque)
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{
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NetFilterState *nf = opaque;
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FilterBufferState *s = FILTER_BUFFER(nf);
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/*
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* Note: filter_buffer_flush() drops packets that can't be sent
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* TODO: We should leave them queued. But currently there's no way
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* for the next filter or receiver to notify us that it can receive
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* more packets.
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*/
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filter_buffer_flush(nf);
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/* Timer rearmed to fire again in s->interval microseconds. */
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timer_mod(&s->release_timer,
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qemu_clock_get_us(QEMU_CLOCK_VIRTUAL) + s->interval);
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}
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/* filter APIs */
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static ssize_t filter_buffer_receive_iov(NetFilterState *nf,
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NetClientState *sender,
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unsigned flags,
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const struct iovec *iov,
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int iovcnt,
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NetPacketSent *sent_cb)
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{
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FilterBufferState *s = FILTER_BUFFER(nf);
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/*
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* We return size when buffer a packet, the sender will take it as
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* a already sent packet, so sent_cb should not be called later.
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*
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* FIXME: Even if the guest can't receive packets for some reasons,
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* the filter can still accept packets until its internal queue is full.
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* For example:
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* For some reason, receiver could not receive more packets
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2020-03-05 20:56:49 +03:00
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* (.can_receive() returns false). Without a filter, at most one packet
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2015-10-07 06:52:21 +03:00
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* will be queued in incoming queue and sender's poll will be disabled
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* unit its sent_cb() was called. With a filter, it will keep receiving
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* the packets without caring about the receiver. This is suboptimal.
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* May need more thoughts (e.g keeping sent_cb).
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*/
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qemu_net_queue_append_iov(s->incoming_queue, sender, flags,
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iov, iovcnt, NULL);
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return iov_size(iov, iovcnt);
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}
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static void filter_buffer_cleanup(NetFilterState *nf)
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{
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FilterBufferState *s = FILTER_BUFFER(nf);
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if (s->interval) {
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timer_del(&s->release_timer);
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}
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/* flush packets */
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if (s->incoming_queue) {
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filter_buffer_flush(nf);
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g_free(s->incoming_queue);
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}
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}
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2016-03-01 08:37:03 +03:00
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static void filter_buffer_setup_timer(NetFilterState *nf)
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{
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FilterBufferState *s = FILTER_BUFFER(nf);
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if (s->interval) {
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timer_init_us(&s->release_timer, QEMU_CLOCK_VIRTUAL,
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filter_buffer_release_timer, nf);
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/* Timer armed to fire in s->interval microseconds. */
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timer_mod(&s->release_timer,
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qemu_clock_get_us(QEMU_CLOCK_VIRTUAL) + s->interval);
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}
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}
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2015-10-07 06:52:21 +03:00
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static void filter_buffer_setup(NetFilterState *nf, Error **errp)
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{
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FilterBufferState *s = FILTER_BUFFER(nf);
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/*
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* We may want to accept zero interval when VM FT solutions like MC
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* or COLO use this filter to release packets on demand.
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*/
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if (!s->interval) {
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error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "interval",
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"a non-zero interval");
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return;
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}
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s->incoming_queue = qemu_new_net_queue(qemu_netfilter_pass_to_next, nf);
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2016-03-01 08:37:03 +03:00
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filter_buffer_setup_timer(nf);
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}
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static void filter_buffer_status_changed(NetFilterState *nf, Error **errp)
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{
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FilterBufferState *s = FILTER_BUFFER(nf);
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if (!nf->on) {
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if (s->interval) {
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timer_del(&s->release_timer);
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}
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filter_buffer_flush(nf);
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} else {
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filter_buffer_setup_timer(nf);
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2015-10-07 06:52:21 +03:00
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}
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}
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static void filter_buffer_class_init(ObjectClass *oc, void *data)
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{
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NetFilterClass *nfc = NETFILTER_CLASS(oc);
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nfc->setup = filter_buffer_setup;
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nfc->cleanup = filter_buffer_cleanup;
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nfc->receive_iov = filter_buffer_receive_iov;
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2016-03-01 08:37:03 +03:00
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nfc->status_changed = filter_buffer_status_changed;
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2015-10-07 06:52:21 +03:00
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}
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qom: Swap 'name' next to visitor in ObjectPropertyAccessor
Similar to the previous patch, it's nice to have all functions
in the tree that involve a visitor and a name for conversion to
or from QAPI to consistently stick the 'name' parameter next
to the Visitor parameter.
Done by manually changing include/qom/object.h and qom/object.c,
then running this Coccinelle script and touching up the fallout
(Coccinelle insisted on adding some trailing whitespace).
@ rule1 @
identifier fn;
typedef Object, Visitor, Error;
identifier obj, v, opaque, name, errp;
@@
void fn
- (Object *obj, Visitor *v, void *opaque, const char *name,
+ (Object *obj, Visitor *v, const char *name, void *opaque,
Error **errp) { ... }
@@
identifier rule1.fn;
expression obj, v, opaque, name, errp;
@@
fn(obj, v,
- opaque, name,
+ name, opaque,
errp)
Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <1454075341-13658-20-git-send-email-eblake@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2016-01-29 16:48:55 +03:00
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static void filter_buffer_get_interval(Object *obj, Visitor *v,
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const char *name, void *opaque,
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Error **errp)
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2015-10-07 06:52:21 +03:00
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{
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FilterBufferState *s = FILTER_BUFFER(obj);
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uint32_t value = s->interval;
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qapi: Swap visit_* arguments for consistent 'name' placement
JSON uses "name":value, but many of our visitor interfaces were
called with visit_type_FOO(v, &value, name, errp). This can be
a bit confusing to have to mentally swap the parameter order to
match JSON order. It's particularly bad for visit_start_struct(),
where the 'name' parameter is smack in the middle of the
otherwise-related group of 'obj, kind, size' parameters! It's
time to do a global swap of the parameter ordering, so that the
'name' parameter is always immediately after the Visitor argument.
Additional reason in favor of the swap: the existing include/qjson.h
prefers listing 'name' first in json_prop_*(), and I have plans to
unify that file with the qapi visitors; listing 'name' first in
qapi will minimize churn to the (admittedly few) qjson.h clients.
Later patches will then fix docs, object.h, visitor-impl.h, and
those clients to match.
Done by first patching scripts/qapi*.py by hand to make generated
files do what I want, then by running the following Coccinelle
script to affect the rest of the code base:
$ spatch --sp-file script `git grep -l '\bvisit_' -- '**/*.[ch]'`
I then had to apply some touchups (Coccinelle insisted on TAB
indentation in visitor.h, and botched the signature of
visit_type_enum() by rewriting 'const char *const strings[]' to
the syntactically invalid 'const char*const[] strings'). The
movement of parameters is sufficient to provoke compiler errors
if any callers were missed.
// Part 1: Swap declaration order
@@
type TV, TErr, TObj, T1, T2;
identifier OBJ, ARG1, ARG2;
@@
void visit_start_struct
-(TV v, TObj OBJ, T1 ARG1, const char *name, T2 ARG2, TErr errp)
+(TV v, const char *name, TObj OBJ, T1 ARG1, T2 ARG2, TErr errp)
{ ... }
@@
type bool, TV, T1;
identifier ARG1;
@@
bool visit_optional
-(TV v, T1 ARG1, const char *name)
+(TV v, const char *name, T1 ARG1)
{ ... }
@@
type TV, TErr, TObj, T1;
identifier OBJ, ARG1;
@@
void visit_get_next_type
-(TV v, TObj OBJ, T1 ARG1, const char *name, TErr errp)
+(TV v, const char *name, TObj OBJ, T1 ARG1, TErr errp)
{ ... }
@@
type TV, TErr, TObj, T1, T2;
identifier OBJ, ARG1, ARG2;
@@
void visit_type_enum
-(TV v, TObj OBJ, T1 ARG1, T2 ARG2, const char *name, TErr errp)
+(TV v, const char *name, TObj OBJ, T1 ARG1, T2 ARG2, TErr errp)
{ ... }
@@
type TV, TErr, TObj;
identifier OBJ;
identifier VISIT_TYPE =~ "^visit_type_";
@@
void VISIT_TYPE
-(TV v, TObj OBJ, const char *name, TErr errp)
+(TV v, const char *name, TObj OBJ, TErr errp)
{ ... }
// Part 2: swap caller order
@@
expression V, NAME, OBJ, ARG1, ARG2, ERR;
identifier VISIT_TYPE =~ "^visit_type_";
@@
(
-visit_start_struct(V, OBJ, ARG1, NAME, ARG2, ERR)
+visit_start_struct(V, NAME, OBJ, ARG1, ARG2, ERR)
|
-visit_optional(V, ARG1, NAME)
+visit_optional(V, NAME, ARG1)
|
-visit_get_next_type(V, OBJ, ARG1, NAME, ERR)
+visit_get_next_type(V, NAME, OBJ, ARG1, ERR)
|
-visit_type_enum(V, OBJ, ARG1, ARG2, NAME, ERR)
+visit_type_enum(V, NAME, OBJ, ARG1, ARG2, ERR)
|
-VISIT_TYPE(V, OBJ, NAME, ERR)
+VISIT_TYPE(V, NAME, OBJ, ERR)
)
Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <1454075341-13658-19-git-send-email-eblake@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2016-01-29 16:48:54 +03:00
|
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visit_type_uint32(v, name, &value, errp);
|
2015-10-07 06:52:21 +03:00
|
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|
}
|
|
|
|
|
qom: Swap 'name' next to visitor in ObjectPropertyAccessor
Similar to the previous patch, it's nice to have all functions
in the tree that involve a visitor and a name for conversion to
or from QAPI to consistently stick the 'name' parameter next
to the Visitor parameter.
Done by manually changing include/qom/object.h and qom/object.c,
then running this Coccinelle script and touching up the fallout
(Coccinelle insisted on adding some trailing whitespace).
@ rule1 @
identifier fn;
typedef Object, Visitor, Error;
identifier obj, v, opaque, name, errp;
@@
void fn
- (Object *obj, Visitor *v, void *opaque, const char *name,
+ (Object *obj, Visitor *v, const char *name, void *opaque,
Error **errp) { ... }
@@
identifier rule1.fn;
expression obj, v, opaque, name, errp;
@@
fn(obj, v,
- opaque, name,
+ name, opaque,
errp)
Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <1454075341-13658-20-git-send-email-eblake@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2016-01-29 16:48:55 +03:00
|
|
|
static void filter_buffer_set_interval(Object *obj, Visitor *v,
|
|
|
|
const char *name, void *opaque,
|
|
|
|
Error **errp)
|
2015-10-07 06:52:21 +03:00
|
|
|
{
|
|
|
|
FilterBufferState *s = FILTER_BUFFER(obj);
|
|
|
|
Error *local_err = NULL;
|
|
|
|
uint32_t value;
|
|
|
|
|
qapi: Swap visit_* arguments for consistent 'name' placement
JSON uses "name":value, but many of our visitor interfaces were
called with visit_type_FOO(v, &value, name, errp). This can be
a bit confusing to have to mentally swap the parameter order to
match JSON order. It's particularly bad for visit_start_struct(),
where the 'name' parameter is smack in the middle of the
otherwise-related group of 'obj, kind, size' parameters! It's
time to do a global swap of the parameter ordering, so that the
'name' parameter is always immediately after the Visitor argument.
Additional reason in favor of the swap: the existing include/qjson.h
prefers listing 'name' first in json_prop_*(), and I have plans to
unify that file with the qapi visitors; listing 'name' first in
qapi will minimize churn to the (admittedly few) qjson.h clients.
Later patches will then fix docs, object.h, visitor-impl.h, and
those clients to match.
Done by first patching scripts/qapi*.py by hand to make generated
files do what I want, then by running the following Coccinelle
script to affect the rest of the code base:
$ spatch --sp-file script `git grep -l '\bvisit_' -- '**/*.[ch]'`
I then had to apply some touchups (Coccinelle insisted on TAB
indentation in visitor.h, and botched the signature of
visit_type_enum() by rewriting 'const char *const strings[]' to
the syntactically invalid 'const char*const[] strings'). The
movement of parameters is sufficient to provoke compiler errors
if any callers were missed.
// Part 1: Swap declaration order
@@
type TV, TErr, TObj, T1, T2;
identifier OBJ, ARG1, ARG2;
@@
void visit_start_struct
-(TV v, TObj OBJ, T1 ARG1, const char *name, T2 ARG2, TErr errp)
+(TV v, const char *name, TObj OBJ, T1 ARG1, T2 ARG2, TErr errp)
{ ... }
@@
type bool, TV, T1;
identifier ARG1;
@@
bool visit_optional
-(TV v, T1 ARG1, const char *name)
+(TV v, const char *name, T1 ARG1)
{ ... }
@@
type TV, TErr, TObj, T1;
identifier OBJ, ARG1;
@@
void visit_get_next_type
-(TV v, TObj OBJ, T1 ARG1, const char *name, TErr errp)
+(TV v, const char *name, TObj OBJ, T1 ARG1, TErr errp)
{ ... }
@@
type TV, TErr, TObj, T1, T2;
identifier OBJ, ARG1, ARG2;
@@
void visit_type_enum
-(TV v, TObj OBJ, T1 ARG1, T2 ARG2, const char *name, TErr errp)
+(TV v, const char *name, TObj OBJ, T1 ARG1, T2 ARG2, TErr errp)
{ ... }
@@
type TV, TErr, TObj;
identifier OBJ;
identifier VISIT_TYPE =~ "^visit_type_";
@@
void VISIT_TYPE
-(TV v, TObj OBJ, const char *name, TErr errp)
+(TV v, const char *name, TObj OBJ, TErr errp)
{ ... }
// Part 2: swap caller order
@@
expression V, NAME, OBJ, ARG1, ARG2, ERR;
identifier VISIT_TYPE =~ "^visit_type_";
@@
(
-visit_start_struct(V, OBJ, ARG1, NAME, ARG2, ERR)
+visit_start_struct(V, NAME, OBJ, ARG1, ARG2, ERR)
|
-visit_optional(V, ARG1, NAME)
+visit_optional(V, NAME, ARG1)
|
-visit_get_next_type(V, OBJ, ARG1, NAME, ERR)
+visit_get_next_type(V, NAME, OBJ, ARG1, ERR)
|
-visit_type_enum(V, OBJ, ARG1, ARG2, NAME, ERR)
+visit_type_enum(V, NAME, OBJ, ARG1, ARG2, ERR)
|
-VISIT_TYPE(V, OBJ, NAME, ERR)
+VISIT_TYPE(V, NAME, OBJ, ERR)
)
Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <1454075341-13658-19-git-send-email-eblake@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2016-01-29 16:48:54 +03:00
|
|
|
visit_type_uint32(v, name, &value, &local_err);
|
2015-10-07 06:52:21 +03:00
|
|
|
if (local_err) {
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
if (!value) {
|
|
|
|
error_setg(&local_err, "Property '%s.%s' requires a positive value",
|
|
|
|
object_get_typename(obj), name);
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
s->interval = value;
|
|
|
|
|
|
|
|
out:
|
|
|
|
error_propagate(errp, local_err);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void filter_buffer_init(Object *obj)
|
|
|
|
{
|
2017-06-07 19:36:06 +03:00
|
|
|
object_property_add(obj, "interval", "uint32",
|
2015-10-07 06:52:21 +03:00
|
|
|
filter_buffer_get_interval,
|
qom: Drop parameter @errp of object_property_add() & friends
The only way object_property_add() can fail is when a property with
the same name already exists. Since our property names are all
hardcoded, failure is a programming error, and the appropriate way to
handle it is passing &error_abort.
Same for its variants, except for object_property_add_child(), which
additionally fails when the child already has a parent. Parentage is
also under program control, so this is a programming error, too.
We have a bit over 500 callers. Almost half of them pass
&error_abort, slightly fewer ignore errors, one test case handles
errors, and the remaining few callers pass them to their own callers.
The previous few commits demonstrated once again that ignoring
programming errors is a bad idea.
Of the few ones that pass on errors, several violate the Error API.
The Error ** argument must be NULL, &error_abort, &error_fatal, or a
pointer to a variable containing NULL. Passing an argument of the
latter kind twice without clearing it in between is wrong: if the
first call sets an error, it no longer points to NULL for the second
call. ich9_pm_add_properties(), sparc32_ledma_realize(),
sparc32_dma_realize(), xilinx_axidma_realize(), xilinx_enet_realize()
are wrong that way.
When the one appropriate choice of argument is &error_abort, letting
users pick the argument is a bad idea.
Drop parameter @errp and assert the preconditions instead.
There's one exception to "duplicate property name is a programming
error": the way object_property_add() implements the magic (and
undocumented) "automatic arrayification". Don't drop @errp there.
Instead, rename object_property_add() to object_property_try_add(),
and add the obvious wrapper object_property_add().
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20200505152926.18877-15-armbru@redhat.com>
[Two semantic rebase conflicts resolved]
2020-05-05 18:29:22 +03:00
|
|
|
filter_buffer_set_interval, NULL, NULL);
|
2015-10-07 06:52:21 +03:00
|
|
|
}
|
|
|
|
|
|
|
|
static const TypeInfo filter_buffer_info = {
|
|
|
|
.name = TYPE_FILTER_BUFFER,
|
|
|
|
.parent = TYPE_NETFILTER,
|
|
|
|
.class_init = filter_buffer_class_init,
|
|
|
|
.instance_init = filter_buffer_init,
|
|
|
|
.instance_size = sizeof(FilterBufferState),
|
|
|
|
};
|
|
|
|
|
|
|
|
static void register_types(void)
|
|
|
|
{
|
|
|
|
type_register_static(&filter_buffer_info);
|
|
|
|
}
|
|
|
|
|
|
|
|
type_init(register_types);
|