| Message ID | 1453713170-13156-1-git-send-email-zhang.zhanghailiang@huawei.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On 01/25/2016 02:12 AM, zhanghailiang wrote: > The properties of netfilter object could be changed by 'qom-set' > command, but the output of 'info network' command is not updated, > because it got the old information through nf->info_str, it will > not be updated while we change the value of netfilter's property. > > Here we split a helper function that could colletct the output s/colletct/collect/ > information for filter, and also remove the useless member > 'info_str' from struct NetFilterState. > > Signed-off-by: zhanghailiang <zhang.zhanghailiang@huawei.com> > Cc: Jason Wang <jasowang@redhat.com> > Cc: Eric Blake <eblake@redhat.com> > Cc: Markus Armbruster <armbru@redhat.com> > Cc: Yang Hongyang <hongyang.yang@easystack.cn> > --- > include/net/filter.h | 3 ++- > net/filter.c | 47 ++++++++++++++++++++++++++--------------------- > net/net.c | 5 ++++- > 3 files changed, 32 insertions(+), 23 deletions(-) > > +++ b/include/net/filter.h > @@ -55,7 +55,6 @@ struct NetFilterState { > char *netdev_id; > NetClientState *netdev; > NetFilterDirection direction; > - char info_str[256]; Fixed size buffer... > QTAILQ_ENTRY(NetFilterState) next; > }; > > @@ -74,4 +73,6 @@ ssize_t qemu_netfilter_pass_to_next(NetClientState *sender, > int iovcnt, > void *opaque); > > +void netfilter_print_info(NetFilterState *nf, char *output_str, int size); > + > #endif /* QEMU_NET_FILTER_H */ > diff --git a/net/filter.c b/net/filter.c > index 5d90f83..40254bd 100644 > --- a/net/filter.c > +++ b/net/filter.c > @@ -128,6 +128,31 @@ static void netfilter_init(Object *obj) > NULL); > } > > +void netfilter_print_info(NetFilterState *nf, char *output_str, int size) > +{ > + char *str, *info; > + ObjectProperty *prop; > + ObjectPropertyIterator iter; > + StringOutputVisitor *ov; > + > + /* generate info str */ > + object_property_iter_init(&iter, OBJECT(nf)); > + while ((prop = object_property_iter_next(&iter))) { > + if (!strcmp(prop->name, "type")) { > + continue; > + } > + ov = string_output_visitor_new(false); > + object_property_get(OBJECT(nf), string_output_get_visitor(ov), > + prop->name, NULL); > + str = string_output_get_string(ov); > + string_output_visitor_cleanup(ov); > + info = g_strdup_printf(",%s=%s", prop->name, str); ...but variable-sized print collection. Why not just rewrite the function to malloc the entire string, and ditch the fixed-size buffer and size parameters altogether, while at it? > + g_strlcat(output_str, info, size); > + g_free(str); > + g_free(info); > + } > +} > + > +++ b/net/net.c > @@ -1198,9 +1198,12 @@ void print_net_client(Monitor *mon, NetClientState *nc) > } > QTAILQ_FOREACH(nf, &nc->filters, next) { > char *path = object_get_canonical_path_component(OBJECT(nf)); > + char info[256] = { 0 }; > + > + netfilter_print_info(nf, info, sizeof(info)); > monitor_printf(mon, " - %s: type=%s%s\n", path, > object_get_typename(OBJECT(nf)), > - nf->info_str); > + info); Or, instead of printing into a temporary string just to then replay that string to monitor_printf(), why not have netfilter_print_info() directly write to the monitor (that is, use monitor_printf() directly in the helper function, instead of g_strlcat() into a temporary string).
On 2016/1/26 4:49, Eric Blake wrote: > On 01/25/2016 02:12 AM, zhanghailiang wrote: >> The properties of netfilter object could be changed by 'qom-set' >> command, but the output of 'info network' command is not updated, >> because it got the old information through nf->info_str, it will >> not be updated while we change the value of netfilter's property. >> >> Here we split a helper function that could colletct the output > > s/colletct/collect/ > >> information for filter, and also remove the useless member >> 'info_str' from struct NetFilterState. >> >> Signed-off-by: zhanghailiang <zhang.zhanghailiang@huawei.com> >> Cc: Jason Wang <jasowang@redhat.com> >> Cc: Eric Blake <eblake@redhat.com> >> Cc: Markus Armbruster <armbru@redhat.com> >> Cc: Yang Hongyang <hongyang.yang@easystack.cn> >> --- >> include/net/filter.h | 3 ++- >> net/filter.c | 47 ++++++++++++++++++++++++++--------------------- >> net/net.c | 5 ++++- >> 3 files changed, 32 insertions(+), 23 deletions(-) >> > >> +++ b/include/net/filter.h >> @@ -55,7 +55,6 @@ struct NetFilterState { >> char *netdev_id; >> NetClientState *netdev; >> NetFilterDirection direction; >> - char info_str[256]; > > Fixed size buffer... > >> QTAILQ_ENTRY(NetFilterState) next; >> }; >> >> @@ -74,4 +73,6 @@ ssize_t qemu_netfilter_pass_to_next(NetClientState *sender, >> int iovcnt, >> void *opaque); >> >> +void netfilter_print_info(NetFilterState *nf, char *output_str, int size); >> + >> #endif /* QEMU_NET_FILTER_H */ >> diff --git a/net/filter.c b/net/filter.c >> index 5d90f83..40254bd 100644 >> --- a/net/filter.c >> +++ b/net/filter.c >> @@ -128,6 +128,31 @@ static void netfilter_init(Object *obj) >> NULL); >> } >> >> +void netfilter_print_info(NetFilterState *nf, char *output_str, int size) >> +{ >> + char *str, *info; >> + ObjectProperty *prop; >> + ObjectPropertyIterator iter; >> + StringOutputVisitor *ov; >> + >> + /* generate info str */ >> + object_property_iter_init(&iter, OBJECT(nf)); >> + while ((prop = object_property_iter_next(&iter))) { >> + if (!strcmp(prop->name, "type")) { >> + continue; >> + } >> + ov = string_output_visitor_new(false); >> + object_property_get(OBJECT(nf), string_output_get_visitor(ov), >> + prop->name, NULL); >> + str = string_output_get_string(ov); >> + string_output_visitor_cleanup(ov); >> + info = g_strdup_printf(",%s=%s", prop->name, str); > > ...but variable-sized print collection. Why not just rewrite the > function to malloc the entire string, and ditch the fixed-size buffer > and size parameters altogether, while at it? > Yes, that is not elegant. It is inherited from the old codes. >> + g_strlcat(output_str, info, size); >> + g_free(str); >> + g_free(info); >> + } >> +} >> + > >> +++ b/net/net.c >> @@ -1198,9 +1198,12 @@ void print_net_client(Monitor *mon, NetClientState *nc) >> } >> QTAILQ_FOREACH(nf, &nc->filters, next) { >> char *path = object_get_canonical_path_component(OBJECT(nf)); >> + char info[256] = { 0 }; >> + >> + netfilter_print_info(nf, info, sizeof(info)); >> monitor_printf(mon, " - %s: type=%s%s\n", path, >> object_get_typename(OBJECT(nf)), >> - nf->info_str); >> + info); > > Or, instead of printing into a temporary string just to then replay that > string to monitor_printf(), why not have netfilter_print_info() directly > write to the monitor (that is, use monitor_printf() directly in the > helper function, instead of g_strlcat() into a temporary string). > Good idea, i will fix it like that in next version, thanks.
diff --git a/include/net/filter.h b/include/net/filter.h index 2deda36..8a20138 100644 --- a/include/net/filter.h +++ b/include/net/filter.h @@ -55,7 +55,6 @@ struct NetFilterState { char *netdev_id; NetClientState *netdev; NetFilterDirection direction; - char info_str[256]; QTAILQ_ENTRY(NetFilterState) next; }; @@ -74,4 +73,6 @@ ssize_t qemu_netfilter_pass_to_next(NetClientState *sender, int iovcnt, void *opaque); +void netfilter_print_info(NetFilterState *nf, char *output_str, int size); + #endif /* QEMU_NET_FILTER_H */ diff --git a/net/filter.c b/net/filter.c index 5d90f83..40254bd 100644 --- a/net/filter.c +++ b/net/filter.c @@ -128,6 +128,31 @@ static void netfilter_init(Object *obj) NULL); } +void netfilter_print_info(NetFilterState *nf, char *output_str, int size) +{ + char *str, *info; + ObjectProperty *prop; + ObjectPropertyIterator iter; + StringOutputVisitor *ov; + + /* generate info str */ + object_property_iter_init(&iter, OBJECT(nf)); + while ((prop = object_property_iter_next(&iter))) { + if (!strcmp(prop->name, "type")) { + continue; + } + ov = string_output_visitor_new(false); + object_property_get(OBJECT(nf), string_output_get_visitor(ov), + prop->name, NULL); + str = string_output_get_string(ov); + string_output_visitor_cleanup(ov); + info = g_strdup_printf(",%s=%s", prop->name, str); + g_strlcat(output_str, info, size); + g_free(str); + g_free(info); + } +} + static void netfilter_complete(UserCreatable *uc, Error **errp) { NetFilterState *nf = NETFILTER(uc); @@ -135,10 +160,7 @@ static void netfilter_complete(UserCreatable *uc, Error **errp) NetFilterClass *nfc = NETFILTER_GET_CLASS(uc); int queues; Error *local_err = NULL; - char *str, *info; - ObjectProperty *prop; - ObjectPropertyIterator iter; - StringOutputVisitor *ov; + if (!nf->netdev_id) { error_setg(errp, "Parameter 'netdev' is required"); @@ -172,23 +194,6 @@ static void netfilter_complete(UserCreatable *uc, Error **errp) } } QTAILQ_INSERT_TAIL(&nf->netdev->filters, nf, next); - - /* generate info str */ - object_property_iter_init(&iter, OBJECT(nf)); - while ((prop = object_property_iter_next(&iter))) { - if (!strcmp(prop->name, "type")) { - continue; - } - ov = string_output_visitor_new(false); - object_property_get(OBJECT(nf), string_output_get_visitor(ov), - prop->name, errp); - str = string_output_get_string(ov); - string_output_visitor_cleanup(ov); - info = g_strdup_printf(",%s=%s", prop->name, str); - g_strlcat(nf->info_str, info, sizeof(nf->info_str)); - g_free(str); - g_free(info); - } } static void netfilter_finalize(Object *obj) diff --git a/net/net.c b/net/net.c index 87dd356..87de7c0 100644 --- a/net/net.c +++ b/net/net.c @@ -1198,9 +1198,12 @@ void print_net_client(Monitor *mon, NetClientState *nc) } QTAILQ_FOREACH(nf, &nc->filters, next) { char *path = object_get_canonical_path_component(OBJECT(nf)); + char info[256] = { 0 }; + + netfilter_print_info(nf, info, sizeof(info)); monitor_printf(mon, " - %s: type=%s%s\n", path, object_get_typename(OBJECT(nf)), - nf->info_str); + info); g_free(path); } }
The properties of netfilter object could be changed by 'qom-set' command, but the output of 'info network' command is not updated, because it got the old information through nf->info_str, it will not be updated while we change the value of netfilter's property. Here we split a helper function that could colletct the output information for filter, and also remove the useless member 'info_str' from struct NetFilterState. Signed-off-by: zhanghailiang <zhang.zhanghailiang@huawei.com> Cc: Jason Wang <jasowang@redhat.com> Cc: Eric Blake <eblake@redhat.com> Cc: Markus Armbruster <armbru@redhat.com> Cc: Yang Hongyang <hongyang.yang@easystack.cn> --- include/net/filter.h | 3 ++- net/filter.c | 47 ++++++++++++++++++++++++++--------------------- net/net.c | 5 ++++- 3 files changed, 32 insertions(+), 23 deletions(-)