From b2bc0bc8dfef0380624d7d13764661a446cc809d Mon Sep 17 00:00:00 2001 From: Francis Deslauriers Date: Thu, 5 Dec 2019 15:29:26 -0500 Subject: [PATCH] Extract event enabler fields to specialized struct Signed-off-by: Francis Deslauriers Signed-off-by: Mathieu Desnoyers Change-Id: I356d9b91c6e20c288ca931a4d449a54b67f3937c --- include/lttng/events.h | 31 +++++-- src/lttng-abi.c | 30 +++---- src/lttng-events.c | 189 ++++++++++++++++++++++++----------------- src/lttng-filter.c | 7 +- 4 files changed, 151 insertions(+), 106 deletions(-) diff --git a/include/lttng/events.h b/include/lttng/events.h index a8a39a60..69aca1e0 100644 --- a/include/lttng/events.h +++ b/include/lttng/events.h @@ -341,20 +341,32 @@ struct lttng_enabler { enum lttng_enabler_format_type format_type; - struct list_head node; /* per-session list of enablers */ /* head list of struct lttng_ust_filter_bytecode_node */ struct list_head filter_bytecode_head; struct lttng_kernel_event event_param; + unsigned int enabled:1; +}; + +struct lttng_event_enabler { + struct lttng_enabler base; + struct list_head node; /* per-session list of enablers */ struct lttng_channel *chan; /* * Unused, but kept around to make it explicit that the tracer can do * it. */ struct lttng_ctx *ctx; - unsigned int enabled:1; }; +static inline +struct lttng_enabler *lttng_event_enabler_as_enabler( + struct lttng_event_enabler *event_enabler) +{ + return &event_enabler->base; +} + + struct lttng_channel_ops { struct channel *(*channel_create)(const char *name, struct lttng_channel *lttng_chan, @@ -537,7 +549,7 @@ struct lttng_session { struct lttng_id_tracker vgid_tracker; unsigned int metadata_dumped:1, tstate:1; /* Transient enable state */ - /* List of enablers */ + /* List of event enablers */ struct list_head enablers_head; /* Hash table of events */ struct lttng_event_ht events_ht; @@ -562,12 +574,13 @@ void lttng_unlock_sessions(void); struct list_head *lttng_get_probe_list_head(void); -struct lttng_enabler *lttng_enabler_create(enum lttng_enabler_format_type format_type, +struct lttng_event_enabler *lttng_event_enabler_create( + enum lttng_enabler_format_type format_type, struct lttng_kernel_event *event_param, struct lttng_channel *chan); -int lttng_enabler_enable(struct lttng_enabler *enabler); -int lttng_enabler_disable(struct lttng_enabler *enabler); +int lttng_event_enabler_enable(struct lttng_event_enabler *event_enabler); +int lttng_event_enabler_disable(struct lttng_event_enabler *event_enabler); int lttng_fix_pending_events(void); int lttng_session_active(void); @@ -696,10 +709,10 @@ static inline long lttng_channel_syscall_mask(struct lttng_channel *channel, #endif void lttng_filter_sync_state(struct lttng_bytecode_runtime *runtime); -int lttng_enabler_attach_bytecode(struct lttng_enabler *enabler, +int lttng_event_enabler_attach_bytecode(struct lttng_event_enabler *event_enabler, struct lttng_kernel_filter_bytecode __user *bytecode); -void lttng_enabler_event_link_bytecode(struct lttng_event *event, - struct lttng_enabler *enabler); +void lttng_event_enabler_link_bytecode(struct lttng_event *event, + struct lttng_event_enabler *event_enabler); int lttng_probes_init(void); diff --git a/src/lttng-abi.c b/src/lttng-abi.c index 1ef5ae43..44e000b8 100644 --- a/src/lttng-abi.c +++ b/src/lttng-abi.c @@ -1352,20 +1352,20 @@ int lttng_abi_create_event(struct file *channel_file, goto event_error; if (event_param->instrumentation == LTTNG_KERNEL_TRACEPOINT || event_param->instrumentation == LTTNG_KERNEL_SYSCALL) { - struct lttng_enabler *enabler; + struct lttng_event_enabler *event_enabler; if (strutils_is_star_glob_pattern(event_param->name)) { /* * If the event name is a star globbing pattern, * we create the special star globbing enabler. */ - enabler = lttng_enabler_create(LTTNG_ENABLER_FORMAT_STAR_GLOB, + event_enabler = lttng_event_enabler_create(LTTNG_ENABLER_FORMAT_STAR_GLOB, event_param, channel); } else { - enabler = lttng_enabler_create(LTTNG_ENABLER_FORMAT_NAME, + event_enabler = lttng_event_enabler_create(LTTNG_ENABLER_FORMAT_NAME, event_param, channel); } - priv = enabler; + priv = event_enabler; } else { struct lttng_event *event; @@ -1694,7 +1694,7 @@ static long lttng_event_ioctl(struct file *file, unsigned int cmd, unsigned long arg) { struct lttng_event *event; - struct lttng_enabler *enabler; + struct lttng_event_enabler *event_enabler; enum lttng_event_type *evtype = file->private_data; switch (cmd) { @@ -1715,8 +1715,8 @@ long lttng_event_ioctl(struct file *file, unsigned int cmd, unsigned long arg) event = file->private_data; return lttng_event_enable(event); case LTTNG_TYPE_ENABLER: - enabler = file->private_data; - return lttng_enabler_enable(enabler); + event_enabler = file->private_data; + return lttng_event_enabler_enable(event_enabler); default: WARN_ON_ONCE(1); return -ENOSYS; @@ -1728,8 +1728,8 @@ long lttng_event_ioctl(struct file *file, unsigned int cmd, unsigned long arg) event = file->private_data; return lttng_event_disable(event); case LTTNG_TYPE_ENABLER: - enabler = file->private_data; - return lttng_enabler_disable(enabler); + event_enabler = file->private_data; + return lttng_event_enabler_disable(event_enabler); default: WARN_ON_ONCE(1); return -ENOSYS; @@ -1740,8 +1740,8 @@ long lttng_event_ioctl(struct file *file, unsigned int cmd, unsigned long arg) return -EINVAL; case LTTNG_TYPE_ENABLER: { - enabler = file->private_data; - return lttng_enabler_attach_bytecode(enabler, + event_enabler = file->private_data; + return lttng_event_enabler_attach_bytecode(event_enabler, (struct lttng_kernel_filter_bytecode __user *) arg); } default: @@ -1769,7 +1769,7 @@ static int lttng_event_release(struct inode *inode, struct file *file) { struct lttng_event *event; - struct lttng_enabler *enabler; + struct lttng_event_enabler *event_enabler; enum lttng_event_type *evtype = file->private_data; if (!evtype) @@ -1782,9 +1782,9 @@ int lttng_event_release(struct inode *inode, struct file *file) fput(event->chan->file); break; case LTTNG_TYPE_ENABLER: - enabler = file->private_data; - if (enabler) - fput(enabler->chan->file); + event_enabler = file->private_data; + if (event_enabler) + fput(event_enabler->chan->file); break; default: WARN_ON_ONCE(1); diff --git a/src/lttng-events.c b/src/lttng-events.c index 05abc817..0863484f 100644 --- a/src/lttng-events.c +++ b/src/lttng-events.c @@ -55,9 +55,9 @@ static LIST_HEAD(lttng_transport_list); static DEFINE_MUTEX(sessions_mutex); static struct kmem_cache *event_cache; -static void lttng_session_lazy_sync_enablers(struct lttng_session *session); -static void lttng_session_sync_enablers(struct lttng_session *session); -static void lttng_enabler_destroy(struct lttng_enabler *enabler); +static void lttng_session_lazy_sync_event_enablers(struct lttng_session *session); +static void lttng_session_sync_event_enablers(struct lttng_session *session); +static void lttng_event_enabler_destroy(struct lttng_event_enabler *event_enabler); static void _lttng_event_destroy(struct lttng_event *event); static void _lttng_channel_destroy(struct lttng_channel *chan); @@ -191,7 +191,7 @@ void lttng_session_destroy(struct lttng_session *session) struct lttng_channel *chan, *tmpchan; struct lttng_event *event, *tmpevent; struct lttng_metadata_stream *metadata_stream; - struct lttng_enabler *enabler, *tmpenabler; + struct lttng_event_enabler *event_enabler, *tmp_event_enabler; int ret; mutex_lock(&sessions_mutex); @@ -209,9 +209,9 @@ void lttng_session_destroy(struct lttng_session *session) ret = lttng_syscalls_destroy(chan); WARN_ON(ret); } - list_for_each_entry_safe(enabler, tmpenabler, + list_for_each_entry_safe(event_enabler, tmp_event_enabler, &session->enablers_head, node) - lttng_enabler_destroy(enabler); + lttng_event_enabler_destroy(event_enabler); list_for_each_entry_safe(event, tmpevent, &session->events, list) _lttng_event_destroy(event); list_for_each_entry_safe(chan, tmpchan, &session->chan, list) { @@ -259,7 +259,7 @@ int lttng_session_enable(struct lttng_session *session) session->tstate = 1; /* We need to sync enablers with session before activation. */ - lttng_session_sync_enablers(session); + lttng_session_sync_event_enablers(session); /* * Snapshot the number of events per channel to know the type of header @@ -309,7 +309,7 @@ int lttng_session_disable(struct lttng_session *session) /* Set transient enabler state to "disabled" */ session->tstate = 0; - lttng_session_sync_enablers(session); + lttng_session_sync_event_enablers(session); /* Set each stream's quiescent state. */ list_for_each_entry(chan, &session->chan, list) { @@ -376,7 +376,7 @@ int lttng_channel_enable(struct lttng_channel *channel) } /* Set transient enabler state to "enabled" */ channel->tstate = 1; - lttng_session_sync_enablers(channel->session); + lttng_session_sync_event_enablers(channel->session); /* Set atomically the state to "enabled" */ WRITE_ONCE(channel->enabled, 1); end: @@ -401,7 +401,7 @@ int lttng_channel_disable(struct lttng_channel *channel) WRITE_ONCE(channel->enabled, 0); /* Set transient enabler state to "enabled" */ channel->tstate = 0; - lttng_session_sync_enablers(channel->session); + lttng_session_sync_event_enablers(channel->session); end: mutex_unlock(&sessions_mutex); return ret; @@ -1315,26 +1315,29 @@ int lttng_desc_match_enabler(const struct lttng_event_desc *desc, } static -int lttng_event_match_enabler(struct lttng_event *event, - struct lttng_enabler *enabler) +int lttng_event_enabler_match_event(struct lttng_event_enabler *event_enabler, + struct lttng_event *event) { - if (enabler->event_param.instrumentation != event->instrumentation) + struct lttng_enabler *base_enabler = lttng_event_enabler_as_enabler( + event_enabler); + + if (base_enabler->event_param.instrumentation != event->instrumentation) return 0; - if (lttng_desc_match_enabler(event->desc, enabler) - && event->chan == enabler->chan) + if (lttng_desc_match_enabler(event->desc, base_enabler) + && event->chan == event_enabler->chan) return 1; else return 0; } static -struct lttng_enabler_ref *lttng_event_enabler_ref(struct lttng_event *event, +struct lttng_enabler_ref *lttng_enabler_ref( + struct list_head *enablers_ref_list, struct lttng_enabler *enabler) { struct lttng_enabler_ref *enabler_ref; - list_for_each_entry(enabler_ref, - &event->enablers_ref_head, node) { + list_for_each_entry(enabler_ref, enablers_ref_list, node) { if (enabler_ref->ref == enabler) return enabler_ref; } @@ -1342,9 +1345,9 @@ struct lttng_enabler_ref *lttng_event_enabler_ref(struct lttng_event *event, } static -void lttng_create_tracepoint_if_missing(struct lttng_enabler *enabler) +void lttng_create_tracepoint_if_missing(struct lttng_event_enabler *event_enabler) { - struct lttng_session *session = enabler->chan->session; + struct lttng_session *session = event_enabler->chan->session; struct lttng_probe_desc *probe_desc; const struct lttng_event_desc *desc; int i; @@ -1366,7 +1369,8 @@ void lttng_create_tracepoint_if_missing(struct lttng_enabler *enabler) struct lttng_event *event; desc = probe_desc->event_desc[i]; - if (!lttng_desc_match_enabler(desc, enabler)) + if (!lttng_desc_match_enabler(desc, + lttng_event_enabler_as_enabler(event_enabler))) continue; event_name = desc->name; name_len = strlen(event_name); @@ -1378,7 +1382,7 @@ void lttng_create_tracepoint_if_missing(struct lttng_enabler *enabler) head = &session->events_ht.table[hash & (LTTNG_EVENT_HT_SIZE - 1)]; lttng_hlist_for_each_entry(event, head, hlist) { if (event->desc == desc - && event->chan == enabler->chan) + && event->chan == event_enabler->chan) found = 1; } if (found) @@ -1388,7 +1392,7 @@ void lttng_create_tracepoint_if_missing(struct lttng_enabler *enabler) * We need to create an event for this * event probe. */ - event = _lttng_event_create(enabler->chan, + event = _lttng_event_create(event_enabler->chan, NULL, NULL, desc, LTTNG_KERNEL_TRACEPOINT); if (!event) { @@ -1400,11 +1404,11 @@ void lttng_create_tracepoint_if_missing(struct lttng_enabler *enabler) } static -void lttng_create_syscall_if_missing(struct lttng_enabler *enabler) +void lttng_create_syscall_if_missing(struct lttng_event_enabler *event_enabler) { int ret; - ret = lttng_syscalls_register(enabler->chan, NULL); + ret = lttng_syscalls_register(event_enabler->chan, NULL); WARN_ON_ONCE(ret); } @@ -1414,14 +1418,14 @@ void lttng_create_syscall_if_missing(struct lttng_enabler *enabler) * Should be called with sessions mutex held. */ static -void lttng_create_event_if_missing(struct lttng_enabler *enabler) +void lttng_create_event_if_missing(struct lttng_event_enabler *event_enabler) { - switch (enabler->event_param.instrumentation) { + switch (event_enabler->base.event_param.instrumentation) { case LTTNG_KERNEL_TRACEPOINT: - lttng_create_tracepoint_if_missing(enabler); + lttng_create_tracepoint_if_missing(event_enabler); break; case LTTNG_KERNEL_SYSCALL: - lttng_create_syscall_if_missing(enabler); + lttng_create_syscall_if_missing(event_enabler); break; default: WARN_ON_ONCE(1); @@ -1430,47 +1434,49 @@ void lttng_create_event_if_missing(struct lttng_enabler *enabler) } /* - * Create events associated with an enabler (if not already present), + * Create events associated with an event_enabler (if not already present), * and add backward reference from the event to the enabler. * Should be called with sessions mutex held. */ static -int lttng_enabler_ref_events(struct lttng_enabler *enabler) +int lttng_event_enabler_ref_events(struct lttng_event_enabler *event_enabler) { - struct lttng_channel *chan = enabler->chan; - struct lttng_session *session = chan->session; + struct lttng_channel *chan = event_enabler->chan; + struct lttng_session *session = event_enabler->chan->session; + struct lttng_enabler *base_enabler = lttng_event_enabler_as_enabler(event_enabler); struct lttng_event *event; - if (enabler->event_param.instrumentation == LTTNG_KERNEL_SYSCALL && - enabler->event_param.u.syscall.entryexit == LTTNG_KERNEL_SYSCALL_ENTRYEXIT && - enabler->event_param.u.syscall.abi == LTTNG_KERNEL_SYSCALL_ABI_ALL && - enabler->event_param.u.syscall.match == LTTNG_SYSCALL_MATCH_NAME && - !strcmp(enabler->event_param.name, "*")) { - if (enabler->enabled) + if (base_enabler->event_param.instrumentation == LTTNG_KERNEL_SYSCALL && + base_enabler->event_param.u.syscall.entryexit == LTTNG_KERNEL_SYSCALL_ENTRYEXIT && + base_enabler->event_param.u.syscall.abi == LTTNG_KERNEL_SYSCALL_ABI_ALL && + base_enabler->event_param.u.syscall.match == LTTNG_SYSCALL_MATCH_NAME && + !strcmp(base_enabler->event_param.name, "*")) { + if (base_enabler->enabled) WRITE_ONCE(chan->syscall_all, 1); else WRITE_ONCE(chan->syscall_all, 0); } /* First ensure that probe events are created for this enabler. */ - lttng_create_event_if_missing(enabler); + lttng_create_event_if_missing(event_enabler); - /* For each event matching enabler in session event list. */ + /* For each event matching event_enabler in session event list. */ list_for_each_entry(event, &session->events, list) { struct lttng_enabler_ref *enabler_ref; - if (!lttng_event_match_enabler(event, enabler)) + if (!lttng_event_enabler_match_event(event_enabler, event)) continue; - enabler_ref = lttng_event_enabler_ref(event, enabler); + enabler_ref = lttng_enabler_ref(&event->enablers_ref_head, + lttng_event_enabler_as_enabler(event_enabler)); if (!enabler_ref) { /* * If no backward ref, create it. - * Add backward ref from event to enabler. + * Add backward ref from event to event_enabler. */ enabler_ref = kzalloc(sizeof(*enabler_ref), GFP_KERNEL); if (!enabler_ref) return -ENOMEM; - enabler_ref->ref = enabler; + enabler_ref->ref = lttng_event_enabler_as_enabler(event_enabler); list_add(&enabler_ref->node, &event->enablers_ref_head); } @@ -1478,7 +1484,7 @@ int lttng_enabler_ref_events(struct lttng_enabler *enabler) /* * Link filter bytecodes if not linked yet. */ - lttng_enabler_event_link_bytecode(event, enabler); + lttng_event_enabler_link_bytecode(event, event_enabler); /* TODO: merge event context. */ } @@ -1495,52 +1501,54 @@ int lttng_fix_pending_events(void) struct lttng_session *session; list_for_each_entry(session, &sessions, list) - lttng_session_lazy_sync_enablers(session); + lttng_session_lazy_sync_event_enablers(session); return 0; } -struct lttng_enabler *lttng_enabler_create(enum lttng_enabler_format_type format_type, +struct lttng_event_enabler *lttng_event_enabler_create( + enum lttng_enabler_format_type format_type, struct lttng_kernel_event *event_param, struct lttng_channel *chan) { - struct lttng_enabler *enabler; + struct lttng_event_enabler *event_enabler; - enabler = kzalloc(sizeof(*enabler), GFP_KERNEL); - if (!enabler) + event_enabler = kzalloc(sizeof(*event_enabler), GFP_KERNEL); + if (!event_enabler) return NULL; - enabler->format_type = format_type; - INIT_LIST_HEAD(&enabler->filter_bytecode_head); - memcpy(&enabler->event_param, event_param, - sizeof(enabler->event_param)); - enabler->chan = chan; + event_enabler->base.format_type = format_type; + INIT_LIST_HEAD(&event_enabler->base.filter_bytecode_head); + memcpy(&event_enabler->base.event_param, event_param, + sizeof(event_enabler->base.event_param)); + event_enabler->chan = chan; /* ctx left NULL */ - enabler->enabled = 0; - enabler->evtype = LTTNG_TYPE_ENABLER; + event_enabler->base.enabled = 0; + event_enabler->base.evtype = LTTNG_TYPE_ENABLER; mutex_lock(&sessions_mutex); - list_add(&enabler->node, &enabler->chan->session->enablers_head); - lttng_session_lazy_sync_enablers(enabler->chan->session); + list_add(&event_enabler->node, &event_enabler->chan->session->enablers_head); + lttng_session_lazy_sync_event_enablers(event_enabler->chan->session); mutex_unlock(&sessions_mutex); - return enabler; + return event_enabler; } -int lttng_enabler_enable(struct lttng_enabler *enabler) +int lttng_event_enabler_enable(struct lttng_event_enabler *event_enabler) { mutex_lock(&sessions_mutex); - enabler->enabled = 1; - lttng_session_lazy_sync_enablers(enabler->chan->session); + lttng_event_enabler_as_enabler(event_enabler)->enabled = 1; + lttng_session_lazy_sync_event_enablers(event_enabler->chan->session); mutex_unlock(&sessions_mutex); return 0; } -int lttng_enabler_disable(struct lttng_enabler *enabler) +int lttng_event_enabler_disable(struct lttng_event_enabler *event_enabler) { mutex_lock(&sessions_mutex); - enabler->enabled = 0; - lttng_session_lazy_sync_enablers(enabler->chan->session); + lttng_event_enabler_as_enabler(event_enabler)->enabled = 0; + lttng_session_lazy_sync_event_enablers(event_enabler->chan->session); mutex_unlock(&sessions_mutex); return 0; } +static int lttng_enabler_attach_bytecode(struct lttng_enabler *enabler, struct lttng_kernel_filter_bytecode __user *bytecode) { @@ -1559,11 +1567,12 @@ int lttng_enabler_attach_bytecode(struct lttng_enabler *enabler, sizeof(*bytecode) + bytecode_len); if (ret) goto error_free; + bytecode_node->enabler = enabler; /* Enforce length based on allocated size */ bytecode_node->bc.len = bytecode_len; list_add_tail(&bytecode_node->node, &enabler->filter_bytecode_head); - lttng_session_lazy_sync_enablers(enabler->chan->session); + return 0; error_free: @@ -1571,6 +1580,22 @@ error_free: return ret; } +int lttng_event_enabler_attach_bytecode(struct lttng_event_enabler *event_enabler, + struct lttng_kernel_filter_bytecode __user *bytecode) +{ + int ret; + ret = lttng_enabler_attach_bytecode( + lttng_event_enabler_as_enabler(event_enabler), bytecode); + if (ret) + goto error; + + lttng_session_lazy_sync_event_enablers(event_enabler->chan->session); + return 0; + +error: + return ret; +} + int lttng_event_add_callsite(struct lttng_event *event, struct lttng_kernel_event_callsite __user *callsite) { @@ -1583,7 +1608,7 @@ int lttng_event_add_callsite(struct lttng_event *event, } } -int lttng_enabler_attach_context(struct lttng_enabler *enabler, +int lttng_event_enabler_attach_context(struct lttng_event_enabler *event_enabler, struct lttng_kernel_context *context_param) { return -ENOSYS; @@ -1599,27 +1624,33 @@ void lttng_enabler_destroy(struct lttng_enabler *enabler) &enabler->filter_bytecode_head, node) { kfree(filter_node); } +} + +static +void lttng_event_enabler_destroy(struct lttng_event_enabler *event_enabler) +{ + lttng_enabler_destroy(lttng_event_enabler_as_enabler(event_enabler)); /* Destroy contexts */ - lttng_destroy_context(enabler->ctx); + lttng_destroy_context(event_enabler->ctx); - list_del(&enabler->node); - kfree(enabler); + list_del(&event_enabler->node); + kfree(event_enabler); } /* - * lttng_session_sync_enablers should be called just before starting a + * lttng_session_sync_event_enablers should be called just before starting a * session. * Should be called with sessions mutex held. */ static -void lttng_session_sync_enablers(struct lttng_session *session) +void lttng_session_sync_event_enablers(struct lttng_session *session) { - struct lttng_enabler *enabler; + struct lttng_event_enabler *event_enabler; struct lttng_event *event; - list_for_each_entry(enabler, &session->enablers_head, node) - lttng_enabler_ref_events(enabler); + list_for_each_entry(event_enabler, &session->enablers_head, node) + lttng_event_enabler_ref_events(event_enabler); /* * For each event, if at least one of its enablers is enabled, * and its channel and session transient states are enabled, we @@ -1691,12 +1722,12 @@ void lttng_session_sync_enablers(struct lttng_session *session) * Should be called with sessions mutex held. */ static -void lttng_session_lazy_sync_enablers(struct lttng_session *session) +void lttng_session_lazy_sync_event_enablers(struct lttng_session *session) { /* We can skip if session is not active */ if (!session->active) return; - lttng_session_sync_enablers(session); + lttng_session_sync_event_enablers(session); } /* diff --git a/src/lttng-filter.c b/src/lttng-filter.c index 85576821..0b5e872f 100644 --- a/src/lttng-filter.c +++ b/src/lttng-filter.c @@ -483,17 +483,18 @@ void lttng_filter_sync_state(struct lttng_bytecode_runtime *runtime) /* * Link bytecode for all enablers referenced by an event. */ -void lttng_enabler_event_link_bytecode(struct lttng_event *event, - struct lttng_enabler *enabler) +void lttng_event_enabler_link_bytecode(struct lttng_event *event, + struct lttng_event_enabler *event_enabler) { struct lttng_filter_bytecode_node *bc; struct lttng_bytecode_runtime *runtime; + struct lttng_enabler *base_enabler = lttng_event_enabler_as_enabler(event_enabler); /* Can only be called for events with desc attached */ WARN_ON_ONCE(!event->desc); /* Link each bytecode. */ - list_for_each_entry(bc, &enabler->filter_bytecode_head, node) { + list_for_each_entry(bc, &base_enabler->filter_bytecode_head, node) { int found = 0, ret; struct list_head *insert_loc; -- 2.34.1