[v9,1/3] ndctl, monitor: add ndctl monitor

Message ID	20180629023050.29217-2-qi.fuli@jp.fujitsu.com (mailing list archive)
State	New, archived
Headers	show Return-Path: <linux-nvdimm-bounces@lists.01.org> Received-SPF: Pass (sender SPF authorized) identity=mailfrom; client-ip=202.219.69.169; helo=mgwkm02.jp.fujitsu.com; envelope-from=qi.fuli@jp.fujitsu.com; receiver=linux-nvdimm@lists.01.org From: QI Fuli <qi.fuli@jp.fujitsu.com> To: linux-nvdimm@lists.01.org Subject: [PATCH v9 1/3] ndctl, monitor: add ndctl monitor Date: Fri, 29 Jun 2018 11:30:48 +0900 Message-Id: <20180629023050.29217-2-qi.fuli@jp.fujitsu.com> In-Reply-To: <20180629023050.29217-1-qi.fuli@jp.fujitsu.com> References: <20180629023050.29217-1-qi.fuli@jp.fujitsu.com> Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: linux-nvdimm-bounces@lists.01.org Sender: "Linux-nvdimm" <linux-nvdimm-bounces@lists.01.org>

diff --git a/builtin.h b/builtin.h index d3cc723..675a6ce 100644 --- a/builtin.h +++ b/builtin.h @@ -39,6 +39,7 @@ int cmd_inject_error(int argc, const char **argv, void *ctx); int cmd_wait_scrub(int argc, const char **argv, void *ctx); int cmd_start_scrub(int argc, const char **argv, void *ctx); int cmd_list(int argc, const char **argv, void *ctx); +int cmd_monitor(int argc, const char **argv, void *ctx); #ifdef ENABLE_TEST int cmd_test(int argc, const char **argv, void *ctx); #endif diff --git a/ndctl/Makefile.am b/ndctl/Makefile.am index d22a379..7dbf223 100644 --- a/ndctl/Makefile.am +++ b/ndctl/Makefile.am @@ -16,7 +16,8 @@ ndctl_SOURCES = ndctl.c \ util/json-smart.c \ util/json-firmware.c \ inject-error.c \ - inject-smart.c + inject-smart.c \ + monitor.c if ENABLE_DESTRUCTIVE ndctl_SOURCES += ../test/blk_namespaces.c \ diff --git a/ndctl/lib/libndctl.sym b/ndctl/lib/libndctl.sym index e939993..f64df56 100644 --- a/ndctl/lib/libndctl.sym +++ b/ndctl/lib/libndctl.sym @@ -366,4 +366,5 @@ global: ndctl_namespace_inject_error2; ndctl_namespace_uninject_error2; ndctl_cmd_ars_stat_get_flag_overflow; + ndctl_cmd_smart_get_event_flags; } LIBNDCTL_15; diff --git a/ndctl/lib/smart.c b/ndctl/lib/smart.c index 0455252..90a65d0 100644 --- a/ndctl/lib/smart.c +++ b/ndctl/lib/smart.c @@ -101,6 +101,23 @@ NDCTL_EXPORT unsigned int ndctl_cmd_smart_threshold_get_temperature( smart_cmd_op(smart_threshold_get_supported_alarms, unsigned int, 0); +NDCTL_EXPORT unsigned int ndctl_cmd_smart_get_event_flags(struct ndctl_cmd *cmd) +{ + unsigned int alarm_flags, event_flags = 0; + + alarm_flags = ndctl_cmd_smart_get_alarm_flags(cmd); + if (alarm_flags & ND_SMART_SPARE_TRIP) + event_flags |= ND_EVENT_SPARES_REMAINING; + if (alarm_flags & ND_SMART_MTEMP_TRIP) + event_flags |= ND_EVENT_MEDIA_TEMPERATURE; + if (alarm_flags & ND_SMART_CTEMP_TRIP) + event_flags |= ND_EVENT_CTRL_TEMPERATURE; + if (ndctl_cmd_smart_get_shutdown_state(cmd)) + event_flags |= ND_EVENT_UNCLEAN_SHUTDOWN; + + return event_flags; +} + #define smart_cmd_set_op(op) \ NDCTL_EXPORT int ndctl_cmd_##op(struct ndctl_cmd *cmd, unsigned int val) \ { \ diff --git a/ndctl/libndctl.h b/ndctl/libndctl.h index 9270bae..50f057a 100644 --- a/ndctl/libndctl.h +++ b/ndctl/libndctl.h @@ -240,6 +240,11 @@ int ndctl_cmd_ars_stat_get_flag_overflow(struct ndctl_cmd *ars_stat); #define ND_SMART_NON_CRITICAL_HEALTH (1 << 0) #define ND_SMART_CRITICAL_HEALTH (1 << 1) #define ND_SMART_FATAL_HEALTH (1 << 2) +#define ND_EVENT_SPARES_REMAINING (1 << 0) +#define ND_EVENT_MEDIA_TEMPERATURE (1 << 1) +#define ND_EVENT_CTRL_TEMPERATURE (1 << 2) +#define ND_EVENT_HEALTH_STATE (1 << 3) +#define ND_EVENT_UNCLEAN_SHUTDOWN (1 << 4) struct ndctl_cmd *ndctl_dimm_cmd_new_smart(struct ndctl_dimm *dimm); unsigned int ndctl_cmd_smart_get_flags(struct ndctl_cmd *cmd); @@ -253,6 +258,7 @@ unsigned int ndctl_cmd_smart_get_life_used(struct ndctl_cmd *cmd); unsigned int ndctl_cmd_smart_get_shutdown_state(struct ndctl_cmd *cmd); unsigned int ndctl_cmd_smart_get_shutdown_count(struct ndctl_cmd *cmd); unsigned int ndctl_cmd_smart_get_vendor_size(struct ndctl_cmd *cmd); +unsigned int ndctl_cmd_smart_get_event_flags(struct ndctl_cmd *cmd); unsigned char *ndctl_cmd_smart_get_vendor_data(struct ndctl_cmd *cmd); struct ndctl_cmd *ndctl_dimm_cmd_new_smart_threshold(struct ndctl_dimm *dimm); unsigned int ndctl_cmd_smart_threshold_get_alarm_control(struct ndctl_cmd *cmd); diff --git a/ndctl/monitor.c b/ndctl/monitor.c new file mode 100644 index 0000000..c7b9f6a --- /dev/null +++ b/ndctl/monitor.c @@ -0,0 +1,531 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Copyright(c) 2018, FUJITSU LIMITED. All rights reserved. */ + +#include <stdio.h> +#include <json-c/json.h> +#include <libgen.h> +#include <dirent.h> +#include <util/log.h> +#include <util/json.h> +#include <util/filter.h> +#include <util/util.h> +#include <util/parse-options.h> +#include <util/strbuf.h> +#include <ndctl/lib/private.h> +#include <ndctl/libndctl.h> +#include <sys/epoll.h> +#define BUF_SIZE 2048 + + +static struct monitor { + const char *logfile; + const char *dimm_event; + bool daemon; + unsigned int event_flags; +} monitor; + +struct monitor_dimm { + struct ndctl_dimm *dimm; + int health_eventfd; + unsigned int health; + unsigned int event_flags; + struct list_node list; +}; + +struct util_filter_params param; + +static int did_fail; + +#define fail(fmt, ...) \ +do { \ + did_fail = 1; \ + dbg(ctx, "ndctl-%s:%s:%d: " fmt, \ + VERSION, __func__, __LINE__, ##__VA_ARGS__); \ +} while (0) + +static void log_syslog(struct ndctl_ctx *ctx, int priority, const char *file, + int line, const char *fn, const char *format, va_list args) +{ + char *buf; + + if (vasprintf(&buf, format, args) < 0) { + fail("vasprintf error\n"); + return; + } + syslog(priority, "%s\n", buf); + + free(buf); + return; +} + +static void log_file(struct ndctl_ctx *ctx, int priority, const char *file, + int line, const char *fn, const char *format, va_list args) +{ + FILE *f; + char *buf; + + if (vasprintf(&buf, format, args) < 0) { + fail("vasprintf error\n"); + return; + } + + f = fopen(monitor.logfile, "a+"); + if (!f) { + ndctl_set_log_fn(ctx, log_syslog); + fail("open logfile %s failed\n%s", monitor.logfile, buf); + goto end; + } + fprintf(f, "%s\n", buf); + fclose(f); +end: + free(buf); + return; +} + +static struct json_object *dimm_event_to_json(struct monitor_dimm *mdimm) +{ + struct json_object *jevent, *jobj; + bool spares_flag, media_temp_flag, ctrl_temp_flag, + health_state_flag, unclean_shutdown_flag; + struct ndctl_ctx *ctx = ndctl_dimm_get_ctx(mdimm->dimm); + + jevent = json_object_new_object(); + if (!jevent) { + fail("\n"); + return NULL; + } + + if (monitor.event_flags & ND_EVENT_SPARES_REMAINING) { + spares_flag = !!(mdimm->event_flags + & ND_EVENT_SPARES_REMAINING); + jobj = json_object_new_boolean(spares_flag); + if (jobj) + json_object_object_add(jevent, + "dimm-spares-remaining", jobj); + } + + if (monitor.event_flags & ND_EVENT_MEDIA_TEMPERATURE) { + media_temp_flag = !!(mdimm->event_flags + & ND_EVENT_MEDIA_TEMPERATURE); + jobj = json_object_new_boolean(media_temp_flag); + if (jobj) + json_object_object_add(jevent, + "dimm-media-temperature", jobj); + } + + if (monitor.event_flags & ND_EVENT_CTRL_TEMPERATURE) { + ctrl_temp_flag = !!(mdimm->event_flags + & ND_EVENT_CTRL_TEMPERATURE); + jobj = json_object_new_boolean(ctrl_temp_flag); + if (jobj) + json_object_object_add(jevent, + "dimm-controller-temperature", jobj); + } + + if (monitor.event_flags & ND_EVENT_HEALTH_STATE) { + health_state_flag = !!(mdimm->event_flags + & ND_EVENT_HEALTH_STATE); + jobj = json_object_new_boolean(health_state_flag); + if (jobj) + json_object_object_add(jevent, + "dimm-health-state", jobj); + } + + if (monitor.event_flags & ND_EVENT_UNCLEAN_SHUTDOWN) { + unclean_shutdown_flag = !!(mdimm->event_flags + & ND_EVENT_UNCLEAN_SHUTDOWN); + jobj = json_object_new_boolean(unclean_shutdown_flag); + if (jobj) + json_object_object_add(jevent, + "dimm-unclean-shutdown", jobj); + } + + return jevent; +} + +static int notify_dimm_event(struct monitor_dimm *mdimm) +{ + struct json_object *jmsg, *jdimm, *jobj; + struct timespec ts; + char timestamp[32]; + struct ndctl_ctx *ctx = ndctl_dimm_get_ctx(mdimm->dimm); + + jmsg = json_object_new_object(); + if (!jmsg) { + fail("\n"); + return -1; + } + + clock_gettime(CLOCK_REALTIME, &ts); + sprintf(timestamp, "%10ld.%09ld", ts.tv_sec, ts.tv_nsec); + jobj = json_object_new_string(timestamp); + if (!jobj) { + fail("\n"); + return -1; + } + json_object_object_add(jmsg, "timestamp", jobj); + + jobj = json_object_new_int(getpid()); + if (!jobj) { + fail("\n"); + return -1; + } + json_object_object_add(jmsg, "pid", jobj); + + jobj = dimm_event_to_json(mdimm); + if (!jobj) { + fail("\n"); + return -1; + } + json_object_object_add(jmsg, "event", jobj); + + jdimm = util_dimm_to_json(mdimm->dimm, 0); + if (!jdimm) { + fail("\n"); + return -1; + } + json_object_object_add(jmsg, "dimm", jdimm); + + jobj = util_dimm_health_to_json(mdimm->dimm); + if (!jobj) { + fail("\n"); + return -1; + } + json_object_object_add(jdimm, "health", jobj); + + notice(ctx, "%s", + json_object_to_json_string_ext(jmsg, JSON_C_TO_STRING_PLAIN)); + + free(jobj); + free(jdimm); + free(jmsg); + return 0; +} + +static struct monitor_dimm *util_dimm_event_filter(struct monitor_dimm *mdimm, + unsigned int event_flags) +{ + struct ndctl_cmd *cmd = NULL; + const char *name = ndctl_dimm_get_devname(mdimm->dimm); + struct ndctl_ctx *ctx = ndctl_dimm_get_ctx(mdimm->dimm); + + cmd = ndctl_dimm_cmd_new_smart(mdimm->dimm); + if (!cmd) { + err(ctx, "%s: no smart command support\n", name); + goto out; + } + if (ndctl_cmd_submit(cmd)) { + err(ctx, "%s: smart command failed\n", name); + goto out; + } + mdimm->event_flags = ndctl_cmd_smart_get_event_flags(cmd); + if (mdimm->health != ndctl_cmd_smart_get_health(cmd)) + mdimm->event_flags |= ND_EVENT_HEALTH_STATE; + + if (mdimm->event_flags & event_flags) { + ndctl_cmd_unref(cmd); + return mdimm; + } +out: + ndctl_cmd_unref(cmd); + return NULL; +} + +static int check_dimm_supported_threshold_alarms(struct ndctl_dimm *dimm) +{ + unsigned int alarm; + int rc = -EOPNOTSUPP; + struct ndctl_cmd *st_cmd = NULL, *sst_cmd = NULL; + const char *name = ndctl_dimm_get_devname(dimm); + struct ndctl_ctx *ctx = ndctl_dimm_get_ctx(dimm); + + st_cmd = ndctl_dimm_cmd_new_smart_threshold(dimm); + if (!st_cmd) { + err(ctx, "%s: no smart threshold command support\n", name); + goto out; + } + if (ndctl_cmd_submit(st_cmd)) { + err(ctx, "%s: smart threshold command failed\n", name); + goto out; + } + + sst_cmd = ndctl_dimm_cmd_new_smart_set_threshold(st_cmd); + if (!sst_cmd) { + err(ctx, "%s: no smart set threshold command support\n", name); + goto out; + } + + alarm = ndctl_cmd_smart_threshold_get_alarm_control(st_cmd); + if (monitor.event_flags & ND_EVENT_SPARES_REMAINING) + alarm |= ND_SMART_SPARE_TRIP; + if (monitor.event_flags & ND_EVENT_MEDIA_TEMPERATURE) + alarm |= ND_SMART_TEMP_TRIP; + if (monitor.event_flags & ND_EVENT_CTRL_TEMPERATURE) + alarm |= ND_SMART_CTEMP_TRIP; + ndctl_cmd_smart_threshold_set_alarm_control(sst_cmd, alarm); + + rc = ndctl_cmd_submit(sst_cmd); + if (rc) { + err(ctx, "%s: smart set threshold command failed\n", name); + goto out; + } + +out: + ndctl_cmd_unref(sst_cmd); + ndctl_cmd_unref(st_cmd); + return rc; +} + +static bool filter_region(struct ndctl_region *region, + struct util_filter_ctx *fctx) +{ + return true; +} + +static void filter_dimm(struct ndctl_dimm *dimm, struct util_filter_ctx *fctx) +{ + struct ndctl_cmd *cmd = NULL; + struct monitor_dimm *mdimm; + struct monitor_filter_arg *mfa = fctx->monitor; + struct ndctl_ctx *ctx = ndctl_dimm_get_ctx(dimm); + const char *name = ndctl_dimm_get_devname(dimm); + + if (!ndctl_dimm_is_cmd_supported(dimm, ND_CMD_SMART)) { + err(ctx, "%s: no smart support\n", name); + return; + } + if (!ndctl_dimm_is_cmd_supported(dimm, ND_CMD_SMART_THRESHOLD)) { + err(ctx, "%s: no smart threshold support\n", name); + return; + } + + mdimm = calloc(1, sizeof(struct monitor_dimm)); + if (!mdimm) { + err(ctx, "%s: calloc for monitor dimm failed\n", name); + return; + } + + cmd = ndctl_dimm_cmd_new_smart(dimm); + if (!cmd) { + err(ctx, "%s: no smart command support\n", name); + goto out; + } + if (ndctl_cmd_submit(cmd)) { + err(ctx, "%s: smart command failed\n", name); + goto out; + } + if (!(ndctl_cmd_smart_get_flags(cmd) & ND_SMART_ALARM_VALID)) { + err(ctx, "%s: smart alarm invalid\n", name); + goto out; + } + + if (check_dimm_supported_threshold_alarms(dimm)) { + err(ctx, "%s: check supported threshold alarms failed\n", name); + goto out; + } + + mdimm->dimm = dimm; + mdimm->health_eventfd = ndctl_dimm_get_health_eventfd(dimm); + mdimm->health = ndctl_cmd_smart_get_health(cmd); + mdimm->event_flags = ndctl_cmd_smart_get_event_flags(cmd); + + if (mdimm->event_flags + && util_dimm_event_filter(mdimm, monitor.event_flags)) { + if (notify_dimm_event(mdimm)) { + err(ctx, "%s: notify dimm event failed\n", name); + goto out; + } + } + + list_add_tail(&mfa->dimms, &mdimm->list); + if (mdimm->health_eventfd > mfa->maxfd_dimm) + mfa->maxfd_dimm = mdimm->health_eventfd; + mfa->num_dimm++; + ndctl_cmd_unref(cmd); + return; +out: + ndctl_cmd_unref(cmd); + free(mdimm); + return; +} + +static bool filter_bus(struct ndctl_bus *bus, struct util_filter_ctx *fctx) +{ + return true; +} + +static int monitor_event(struct ndctl_ctx *ctx, + struct monitor_filter_arg *mfa) +{ + struct epoll_event ev, *events; + int nfds, epollfd, i, rc; + struct monitor_dimm *mdimm; + char buf; + + events = calloc(mfa->num_dimm, sizeof(struct epoll_event)); + if (!events) { + err(ctx, "malloc for events error\n"); + return 1; + } + epollfd = epoll_create1(0); + if (epollfd == -1) { + err(ctx, "epoll_create1 error\n"); + return 1; + } + list_for_each(&mfa->dimms, mdimm, list) { + memset(&ev, 0, sizeof(ev)); + rc = pread(mdimm->health_eventfd, &buf, sizeof(buf), 0); + if (rc < 0) { + err(ctx, "pread error\n"); + return 1; + } + ev.data.ptr = mdimm; + if (epoll_ctl(epollfd, EPOLL_CTL_ADD, + mdimm->health_eventfd, &ev) != 0) { + err(ctx, "epoll_ctl error\n"); + return 1; + } + } + + while (1) { + did_fail = 0; + nfds = epoll_wait(epollfd, events, mfa->num_dimm, -1); + if (nfds <= 0) { + err(ctx, "epoll_wait error\n"); + return 1; + } + for (i = 0; i < nfds; i++) { + mdimm = events[i].data.ptr; + if (util_dimm_event_filter(mdimm, monitor.event_flags)) { + if (notify_dimm_event(mdimm)) + fail("%s: notify dimm event failed\n", + ndctl_dimm_get_devname(mdimm->dimm)); + } + rc = pread(mdimm->health_eventfd, &buf, sizeof(buf), 0); + if (rc < 0) + fail("pread error\n"); + } + if (did_fail) + return 1; + } + return 0; +} + +static int parse_monitor_event(struct monitor *_monitor) +{ + char *dimm_event, *save; + const char *event; + + if (!_monitor->dimm_event) + goto dimm_event_all; + dimm_event = strdup(_monitor->dimm_event); + if (!dimm_event) + return 1; + + for (event = strtok_r(dimm_event, " ", &save); event; + event = strtok_r(NULL, " ", &save)) { + if (strcmp(event, "all") == 0) { + free(dimm_event); + goto dimm_event_all; + } + if (strcmp(event, "dimm-spares-remaining") == 0) + _monitor->event_flags |= ND_EVENT_SPARES_REMAINING; + if (strcmp(event, "dimm-media-temperature") == 0) + _monitor->event_flags |= ND_EVENT_MEDIA_TEMPERATURE; + if (strcmp(event, "dimm-controller-temperature") == 0) + _monitor->event_flags |= ND_EVENT_CTRL_TEMPERATURE; + if (strcmp(event, "dimm-health-state") == 0) + _monitor->event_flags |= ND_EVENT_HEALTH_STATE; + if (strcmp(event, "dimm-unclean-shutdown") == 0) + _monitor->event_flags |= ND_EVENT_UNCLEAN_SHUTDOWN; + } + + free(dimm_event); + return 0; + +dimm_event_all: + _monitor->event_flags = ND_EVENT_SPARES_REMAINING + | ND_EVENT_MEDIA_TEMPERATURE + | ND_EVENT_CTRL_TEMPERATURE + | ND_EVENT_HEALTH_STATE + | ND_EVENT_UNCLEAN_SHUTDOWN; + return 0; +} + +int cmd_monitor(int argc, const char **argv, void *ctx) +{ + const struct option options[] = { + OPT_STRING('b', "bus", &param.bus, "bus-id", "filter by bus"), + OPT_STRING('r', "region", &param.region, "region-id", + "filter by region"), + OPT_STRING('d', "dimm", &param.dimm, "dimm-id", + "filter by dimm"), + OPT_STRING('n', "namespace", &param.namespace, + "namespace-id", "filter by namespace id"), + OPT_FILENAME('l', "logfile", &monitor.logfile, "file | syslog", + "where to output the monitor's notification"), + OPT_BOOLEAN('f', "daemon", &monitor.daemon, + "run ndctl monitor as a daemon"), + OPT_STRING('D', "dimm-event", &monitor.dimm_event, + "dimm-spares-remaining | dimm-media-temperature | dimm-controller-temperature | dimm-health-state | dimm-unclean-shutdown", + "filter by DIMM event type"), + OPT_END(), + }; + const char * const u[] = { + "ndctl monitor [<options>]", + NULL + }; + const char *prefix = "./"; + struct util_filter_ctx fctx = { 0 }; + struct monitor_filter_arg mfa = { 0 }; + int i; + + argc = parse_options_prefix(argc, argv, prefix, options, u, 0); + for (i = 0; i < argc; i++) { + error("unknown parameter \"%s\"\n", argv[i]); + } + if (argc) + usage_with_options(u, options); + + if (monitor.logfile && (strcmp(monitor.logfile, "./syslog") != 0)) + ndctl_set_log_fn((struct ndctl_ctx *)ctx, log_file); + else + ndctl_set_log_fn((struct ndctl_ctx *)ctx, log_syslog); + ndctl_set_log_priority((struct ndctl_ctx *)ctx, LOG_NOTICE); + + if (monitor.daemon) { + if (daemon(0, 0) != 0) { + err((struct ndctl_ctx *)ctx, "daemon start failed\n"); + goto out; + } + notice((struct ndctl_ctx *)ctx, "ndctl monitor daemon started\n"); + } + + if (parse_monitor_event(&monitor)) + goto out; + + fctx.filter_bus = filter_bus; + fctx.filter_dimm = filter_dimm; + fctx.filter_region = filter_region; + fctx.filter_namespace = NULL; + fctx.arg = &mfa; + list_head_init(&mfa.dimms); + mfa.num_dimm = 0; + mfa.maxfd_dimm = -1; + mfa.flags = 0; + + if (util_filter_walk(ctx, &fctx, &param)) + goto out; + + if (!mfa.num_dimm) { + err((struct ndctl_ctx *)ctx, "no dimms to monitor\n"); + goto out; + } + + if (monitor_event(ctx, &mfa)) + goto out; + + return 0; +out: + return 1; +} diff --git a/ndctl/ndctl.c b/ndctl/ndctl.c index 7daadeb..73dabfa 100644 --- a/ndctl/ndctl.c +++ b/ndctl/ndctl.c @@ -89,6 +89,7 @@ static struct cmd_struct commands[] = { { "wait-scrub", cmd_wait_scrub }, { "start-scrub", cmd_start_scrub }, { "list", cmd_list }, + { "monitor", cmd_monitor}, { "help", cmd_help }, #ifdef ENABLE_TEST { "test", cmd_test }, diff --git a/util/filter.h b/util/filter.h index effda24..c2cdddf 100644 --- a/util/filter.h +++ b/util/filter.h @@ -13,6 +13,7 @@ #ifndef _UTIL_FILTER_H_ #define _UTIL_FILTER_H_ #include <stdbool.h> +#include <ccan/list/list.h> struct ndctl_bus *util_bus_filter(struct ndctl_bus *bus, const char *ident); struct ndctl_region *util_region_filter(struct ndctl_region *region, @@ -50,6 +51,13 @@ struct list_filter_arg { unsigned long flags; }; +struct monitor_filter_arg { + struct list_head dimms; + int maxfd_dimm; + int num_dimm; + unsigned long flags; +}; + /* * struct util_filter_ctx - control and callbacks for util_filter_walk() * ->filter_bus() and ->filter_region() return bool because the @@ -67,6 +75,7 @@ struct util_filter_ctx { union { void *arg; struct list_filter_arg *list; + struct monitor_filter_arg *monitor; }; };

[v9,1/3] ndctl, monitor: add ndctl monitor

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