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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-04 14:31:17 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-04 14:31:17 +0000 |
commit | 8020f71afd34d7696d7933659df2d763ab05542f (patch) | |
tree | 2fdf1b5447ffd8bdd61e702ca183e814afdcb4fc /collectors/proc.plugin/proc_spl_kstat_zfs.c | |
parent | Initial commit. (diff) | |
download | netdata-upstream.tar.xz netdata-upstream.zip |
Adding upstream version 1.37.1.upstream/1.37.1upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'collectors/proc.plugin/proc_spl_kstat_zfs.c')
-rw-r--r-- | collectors/proc.plugin/proc_spl_kstat_zfs.c | 423 |
1 files changed, 423 insertions, 0 deletions
diff --git a/collectors/proc.plugin/proc_spl_kstat_zfs.c b/collectors/proc.plugin/proc_spl_kstat_zfs.c new file mode 100644 index 0000000..8938d64 --- /dev/null +++ b/collectors/proc.plugin/proc_spl_kstat_zfs.c @@ -0,0 +1,423 @@ +// SPDX-License-Identifier: GPL-3.0-or-later + +#include "plugin_proc.h" +#include "zfs_common.h" + +#define ZFS_PROC_ARCSTATS "/proc/spl/kstat/zfs/arcstats" +#define ZFS_PROC_POOLS "/proc/spl/kstat/zfs" + +#define STATE_SIZE 9 +#define MAX_CHART_ID 256 + +extern struct arcstats arcstats; + +unsigned long long zfs_arcstats_shrinkable_cache_size_bytes = 0; + +int do_proc_spl_kstat_zfs_arcstats(int update_every, usec_t dt) { + (void)dt; + + static int show_zero_charts = 0, do_zfs_stats = 0; + static procfile *ff = NULL; + static char *dirname = NULL; + static ARL_BASE *arl_base = NULL; + + arcstats.l2exist = -1; + + if(unlikely(!arl_base)) { + arl_base = arl_create("arcstats", NULL, 60); + + arl_expect(arl_base, "hits", &arcstats.hits); + arl_expect(arl_base, "misses", &arcstats.misses); + arl_expect(arl_base, "demand_data_hits", &arcstats.demand_data_hits); + arl_expect(arl_base, "demand_data_misses", &arcstats.demand_data_misses); + arl_expect(arl_base, "demand_metadata_hits", &arcstats.demand_metadata_hits); + arl_expect(arl_base, "demand_metadata_misses", &arcstats.demand_metadata_misses); + arl_expect(arl_base, "prefetch_data_hits", &arcstats.prefetch_data_hits); + arl_expect(arl_base, "prefetch_data_misses", &arcstats.prefetch_data_misses); + arl_expect(arl_base, "prefetch_metadata_hits", &arcstats.prefetch_metadata_hits); + arl_expect(arl_base, "prefetch_metadata_misses", &arcstats.prefetch_metadata_misses); + arl_expect(arl_base, "mru_hits", &arcstats.mru_hits); + arl_expect(arl_base, "mru_ghost_hits", &arcstats.mru_ghost_hits); + arl_expect(arl_base, "mfu_hits", &arcstats.mfu_hits); + arl_expect(arl_base, "mfu_ghost_hits", &arcstats.mfu_ghost_hits); + arl_expect(arl_base, "deleted", &arcstats.deleted); + arl_expect(arl_base, "mutex_miss", &arcstats.mutex_miss); + arl_expect(arl_base, "evict_skip", &arcstats.evict_skip); + arl_expect(arl_base, "evict_not_enough", &arcstats.evict_not_enough); + arl_expect(arl_base, "evict_l2_cached", &arcstats.evict_l2_cached); + arl_expect(arl_base, "evict_l2_eligible", &arcstats.evict_l2_eligible); + arl_expect(arl_base, "evict_l2_ineligible", &arcstats.evict_l2_ineligible); + arl_expect(arl_base, "evict_l2_skip", &arcstats.evict_l2_skip); + arl_expect(arl_base, "hash_elements", &arcstats.hash_elements); + arl_expect(arl_base, "hash_elements_max", &arcstats.hash_elements_max); + arl_expect(arl_base, "hash_collisions", &arcstats.hash_collisions); + arl_expect(arl_base, "hash_chains", &arcstats.hash_chains); + arl_expect(arl_base, "hash_chain_max", &arcstats.hash_chain_max); + arl_expect(arl_base, "p", &arcstats.p); + arl_expect(arl_base, "c", &arcstats.c); + arl_expect(arl_base, "c_min", &arcstats.c_min); + arl_expect(arl_base, "c_max", &arcstats.c_max); + arl_expect(arl_base, "size", &arcstats.size); + arl_expect(arl_base, "hdr_size", &arcstats.hdr_size); + arl_expect(arl_base, "data_size", &arcstats.data_size); + arl_expect(arl_base, "metadata_size", &arcstats.metadata_size); + arl_expect(arl_base, "other_size", &arcstats.other_size); + arl_expect(arl_base, "anon_size", &arcstats.anon_size); + arl_expect(arl_base, "anon_evictable_data", &arcstats.anon_evictable_data); + arl_expect(arl_base, "anon_evictable_metadata", &arcstats.anon_evictable_metadata); + arl_expect(arl_base, "mru_size", &arcstats.mru_size); + arl_expect(arl_base, "mru_evictable_data", &arcstats.mru_evictable_data); + arl_expect(arl_base, "mru_evictable_metadata", &arcstats.mru_evictable_metadata); + arl_expect(arl_base, "mru_ghost_size", &arcstats.mru_ghost_size); + arl_expect(arl_base, "mru_ghost_evictable_data", &arcstats.mru_ghost_evictable_data); + arl_expect(arl_base, "mru_ghost_evictable_metadata", &arcstats.mru_ghost_evictable_metadata); + arl_expect(arl_base, "mfu_size", &arcstats.mfu_size); + arl_expect(arl_base, "mfu_evictable_data", &arcstats.mfu_evictable_data); + arl_expect(arl_base, "mfu_evictable_metadata", &arcstats.mfu_evictable_metadata); + arl_expect(arl_base, "mfu_ghost_size", &arcstats.mfu_ghost_size); + arl_expect(arl_base, "mfu_ghost_evictable_data", &arcstats.mfu_ghost_evictable_data); + arl_expect(arl_base, "mfu_ghost_evictable_metadata", &arcstats.mfu_ghost_evictable_metadata); + arl_expect(arl_base, "l2_hits", &arcstats.l2_hits); + arl_expect(arl_base, "l2_misses", &arcstats.l2_misses); + arl_expect(arl_base, "l2_feeds", &arcstats.l2_feeds); + arl_expect(arl_base, "l2_rw_clash", &arcstats.l2_rw_clash); + arl_expect(arl_base, "l2_read_bytes", &arcstats.l2_read_bytes); + arl_expect(arl_base, "l2_write_bytes", &arcstats.l2_write_bytes); + arl_expect(arl_base, "l2_writes_sent", &arcstats.l2_writes_sent); + arl_expect(arl_base, "l2_writes_done", &arcstats.l2_writes_done); + arl_expect(arl_base, "l2_writes_error", &arcstats.l2_writes_error); + arl_expect(arl_base, "l2_writes_lock_retry", &arcstats.l2_writes_lock_retry); + arl_expect(arl_base, "l2_evict_lock_retry", &arcstats.l2_evict_lock_retry); + arl_expect(arl_base, "l2_evict_reading", &arcstats.l2_evict_reading); + arl_expect(arl_base, "l2_evict_l1cached", &arcstats.l2_evict_l1cached); + arl_expect(arl_base, "l2_free_on_write", &arcstats.l2_free_on_write); + arl_expect(arl_base, "l2_cdata_free_on_write", &arcstats.l2_cdata_free_on_write); + arl_expect(arl_base, "l2_abort_lowmem", &arcstats.l2_abort_lowmem); + arl_expect(arl_base, "l2_cksum_bad", &arcstats.l2_cksum_bad); + arl_expect(arl_base, "l2_io_error", &arcstats.l2_io_error); + arl_expect(arl_base, "l2_size", &arcstats.l2_size); + arl_expect(arl_base, "l2_asize", &arcstats.l2_asize); + arl_expect(arl_base, "l2_hdr_size", &arcstats.l2_hdr_size); + arl_expect(arl_base, "l2_compress_successes", &arcstats.l2_compress_successes); + arl_expect(arl_base, "l2_compress_zeros", &arcstats.l2_compress_zeros); + arl_expect(arl_base, "l2_compress_failures", &arcstats.l2_compress_failures); + arl_expect(arl_base, "memory_throttle_count", &arcstats.memory_throttle_count); + arl_expect(arl_base, "duplicate_buffers", &arcstats.duplicate_buffers); + arl_expect(arl_base, "duplicate_buffers_size", &arcstats.duplicate_buffers_size); + arl_expect(arl_base, "duplicate_reads", &arcstats.duplicate_reads); + arl_expect(arl_base, "memory_direct_count", &arcstats.memory_direct_count); + arl_expect(arl_base, "memory_indirect_count", &arcstats.memory_indirect_count); + arl_expect(arl_base, "arc_no_grow", &arcstats.arc_no_grow); + arl_expect(arl_base, "arc_tempreserve", &arcstats.arc_tempreserve); + arl_expect(arl_base, "arc_loaned_bytes", &arcstats.arc_loaned_bytes); + arl_expect(arl_base, "arc_prune", &arcstats.arc_prune); + arl_expect(arl_base, "arc_meta_used", &arcstats.arc_meta_used); + arl_expect(arl_base, "arc_meta_limit", &arcstats.arc_meta_limit); + arl_expect(arl_base, "arc_meta_max", &arcstats.arc_meta_max); + arl_expect(arl_base, "arc_meta_min", &arcstats.arc_meta_min); + arl_expect(arl_base, "arc_need_free", &arcstats.arc_need_free); + arl_expect(arl_base, "arc_sys_free", &arcstats.arc_sys_free); + } + + if(unlikely(!ff)) { + char filename[FILENAME_MAX + 1]; + snprintfz(filename, FILENAME_MAX, "%s%s", netdata_configured_host_prefix, ZFS_PROC_ARCSTATS); + ff = procfile_open(config_get("plugin:proc:" ZFS_PROC_ARCSTATS, "filename to monitor", filename), " \t:", PROCFILE_FLAG_DEFAULT); + if(unlikely(!ff)) + return 1; + + snprintfz(filename, FILENAME_MAX, "%s%s", netdata_configured_host_prefix, "/proc/spl/kstat/zfs"); + dirname = config_get("plugin:proc:" ZFS_PROC_ARCSTATS, "directory to monitor", filename); + + show_zero_charts = config_get_boolean_ondemand("plugin:proc:" ZFS_PROC_ARCSTATS, "show zero charts", CONFIG_BOOLEAN_NO); + if(show_zero_charts == CONFIG_BOOLEAN_AUTO && netdata_zero_metrics_enabled == CONFIG_BOOLEAN_YES) + show_zero_charts = CONFIG_BOOLEAN_YES; + if(unlikely(show_zero_charts == CONFIG_BOOLEAN_YES)) + do_zfs_stats = 1; + } + + // check if any pools exist + if(likely(!do_zfs_stats)) { + DIR *dir = opendir(dirname); + if(unlikely(!dir)) { + error("Cannot read directory '%s'", dirname); + return 1; + } + + struct dirent *de = NULL; + while(likely(de = readdir(dir))) { + if(likely(de->d_type == DT_DIR + && ( + (de->d_name[0] == '.' && de->d_name[1] == '\0') + || (de->d_name[0] == '.' && de->d_name[1] == '.' && de->d_name[2] == '\0') + ))) + continue; + + if(unlikely(de->d_type == DT_LNK || de->d_type == DT_DIR)) { + do_zfs_stats = 1; + break; + } + } + + closedir(dir); + } + + // do not show ZFS filesystem metrics if there haven't been any pools in the system yet + if(unlikely(!do_zfs_stats)) + return 0; + + ff = procfile_readall(ff); + if(unlikely(!ff)) + return 0; // we return 0, so that we will retry to open it next time + + size_t lines = procfile_lines(ff), l; + + arl_begin(arl_base); + + for(l = 0; l < lines ;l++) { + size_t words = procfile_linewords(ff, l); + if(unlikely(words < 3)) { + if(unlikely(words)) error("Cannot read " ZFS_PROC_ARCSTATS " line %zu. Expected 3 params, read %zu.", l, words); + continue; + } + + const char *key = procfile_lineword(ff, l, 0); + const char *value = procfile_lineword(ff, l, 2); + + if(unlikely(arcstats.l2exist == -1)) { + if(key[0] == 'l' && key[1] == '2' && key[2] == '_') + arcstats.l2exist = 1; + } + + if(unlikely(arl_check(arl_base, key, value))) break; + } + + if (arcstats.size > arcstats.c_min) { + zfs_arcstats_shrinkable_cache_size_bytes = arcstats.size - arcstats.c_min; + } else { + zfs_arcstats_shrinkable_cache_size_bytes = 0; + } + + if(unlikely(arcstats.l2exist == -1)) + arcstats.l2exist = 0; + + generate_charts_arcstats(PLUGIN_PROC_NAME, ZFS_PROC_ARCSTATS, show_zero_charts, update_every); + generate_charts_arc_summary(PLUGIN_PROC_NAME, ZFS_PROC_ARCSTATS, show_zero_charts, update_every); + + return 0; +} + +struct zfs_pool { + RRDSET *st; + + RRDDIM *rd_online; + RRDDIM *rd_degraded; + RRDDIM *rd_faulted; + RRDDIM *rd_offline; + RRDDIM *rd_removed; + RRDDIM *rd_unavail; + + int updated; + int disabled; + + int online; + int degraded; + int faulted; + int offline; + int removed; + int unavail; +}; + +struct deleted_zfs_pool { + char *name; + struct deleted_zfs_pool *next; +} *deleted_zfs_pools = NULL; + +DICTIONARY *zfs_pools = NULL; + +void disable_zfs_pool_state(struct zfs_pool *pool) +{ + if (pool->st) + rrdset_is_obsolete(pool->st); + + pool->st = NULL; + + pool->rd_online = NULL; + pool->rd_degraded = NULL; + pool->rd_faulted = NULL; + pool->rd_offline = NULL; + pool->rd_removed = NULL; + pool->rd_unavail = NULL; + + pool->disabled = 1; +} + +int update_zfs_pool_state_chart(const DICTIONARY_ITEM *item, void *pool_p, void *update_every_p) { + const char *name = dictionary_acquired_item_name(item); + struct zfs_pool *pool = (struct zfs_pool *)pool_p; + int update_every = *(int *)update_every_p; + + if (pool->updated) { + pool->updated = 0; + + if (!pool->disabled) { + if (unlikely(!pool->st)) { + char chart_id[MAX_CHART_ID + 1]; + snprintf(chart_id, MAX_CHART_ID, "state_%s", name); + + pool->st = rrdset_create_localhost( + "zfspool", + chart_id, + NULL, + name, + "zfspool.state", + "ZFS pool state", + "boolean", + PLUGIN_PROC_NAME, + ZFS_PROC_POOLS, + NETDATA_CHART_PRIO_ZFS_POOL_STATE, + update_every, + RRDSET_TYPE_LINE); + + pool->rd_online = rrddim_add(pool->st, "online", NULL, 1, 1, RRD_ALGORITHM_ABSOLUTE); + pool->rd_degraded = rrddim_add(pool->st, "degraded", NULL, 1, 1, RRD_ALGORITHM_ABSOLUTE); + pool->rd_faulted = rrddim_add(pool->st, "faulted", NULL, 1, 1, RRD_ALGORITHM_ABSOLUTE); + pool->rd_offline = rrddim_add(pool->st, "offline", NULL, 1, 1, RRD_ALGORITHM_ABSOLUTE); + pool->rd_removed = rrddim_add(pool->st, "removed", NULL, 1, 1, RRD_ALGORITHM_ABSOLUTE); + pool->rd_unavail = rrddim_add(pool->st, "unavail", NULL, 1, 1, RRD_ALGORITHM_ABSOLUTE); + } + + rrddim_set_by_pointer(pool->st, pool->rd_online, pool->online); + rrddim_set_by_pointer(pool->st, pool->rd_degraded, pool->degraded); + rrddim_set_by_pointer(pool->st, pool->rd_faulted, pool->faulted); + rrddim_set_by_pointer(pool->st, pool->rd_offline, pool->offline); + rrddim_set_by_pointer(pool->st, pool->rd_removed, pool->removed); + rrddim_set_by_pointer(pool->st, pool->rd_unavail, pool->unavail); + rrdset_done(pool->st); + } + } else { + disable_zfs_pool_state(pool); + struct deleted_zfs_pool *new = callocz(1, sizeof(struct deleted_zfs_pool)); + new->name = strdupz(name); + new->next = deleted_zfs_pools; + deleted_zfs_pools = new; + } + + return 0; +} + +int do_proc_spl_kstat_zfs_pool_state(int update_every, usec_t dt) +{ + (void)dt; + + static int do_zfs_pool_state = -1; + static char *dirname = NULL; + + int pool_found = 0, state_file_found = 0; + + if (unlikely(do_zfs_pool_state == -1)) { + char filename[FILENAME_MAX + 1]; + snprintfz(filename, FILENAME_MAX, "%s%s", netdata_configured_host_prefix, "/proc/spl/kstat/zfs"); + dirname = config_get("plugin:proc:" ZFS_PROC_POOLS, "directory to monitor", filename); + + zfs_pools = dictionary_create(DICT_OPTION_SINGLE_THREADED); + + do_zfs_pool_state = 1; + } + + if (likely(do_zfs_pool_state)) { + DIR *dir = opendir(dirname); + if (unlikely(!dir)) { + error("Cannot read directory '%s'", dirname); + return 1; + } + + struct dirent *de = NULL; + while (likely(de = readdir(dir))) { + if (likely( + de->d_type == DT_DIR && ((de->d_name[0] == '.' && de->d_name[1] == '\0') || + (de->d_name[0] == '.' && de->d_name[1] == '.' && de->d_name[2] == '\0')))) + continue; + + if (unlikely(de->d_type == DT_LNK || de->d_type == DT_DIR)) { + pool_found = 1; + + struct zfs_pool *pool = dictionary_get(zfs_pools, de->d_name); + + if (unlikely(!pool)) { + struct zfs_pool new_zfs_pool = {}; + pool = dictionary_set(zfs_pools, de->d_name, &new_zfs_pool, sizeof(struct zfs_pool)); + }; + + pool->updated = 1; + + if (pool->disabled) { + state_file_found = 1; + continue; + } + + pool->online = 0; + pool->degraded = 0; + pool->faulted = 0; + pool->offline = 0; + pool->removed = 0; + pool->unavail = 0; + + char filename[FILENAME_MAX + 1]; + snprintfz( + filename, FILENAME_MAX, "%s%s/%s/state", netdata_configured_host_prefix, dirname, de->d_name); + + char state[STATE_SIZE + 1]; + int ret = read_file(filename, state, STATE_SIZE); + + if (!ret) { + state_file_found = 1; + + // ZFS pool states are described at https://openzfs.github.io/openzfs-docs/man/8/zpoolconcepts.8.html?#Device_Failure_and_Recovery + if (!strcmp(state, "ONLINE\n")) { + pool->online = 1; + } else if (!strcmp(state, "DEGRADED\n")) { + pool->degraded = 1; + } else if (!strcmp(state, "FAULTED\n")) { + pool->faulted = 1; + } else if (!strcmp(state, "OFFLINE\n")) { + pool->offline = 1; + } else if (!strcmp(state, "REMOVED\n")) { + pool->removed = 1; + } else if (!strcmp(state, "UNAVAIL\n")) { + pool->unavail = 1; + } else { + disable_zfs_pool_state(pool); + + char *c = strchr(state, '\n'); + if (c) + *c = '\0'; + error("ZFS POOLS: Undefined state %s for zpool %s, disabling the chart", state, de->d_name); + } + } + } + } + + closedir(dir); + } + + if (do_zfs_pool_state && pool_found && !state_file_found) { + info("ZFS POOLS: State files not found. Disabling the module."); + do_zfs_pool_state = 0; + } + + if (do_zfs_pool_state) + dictionary_walkthrough_read(zfs_pools, update_zfs_pool_state_chart, &update_every); + + while (deleted_zfs_pools) { + struct deleted_zfs_pool *current_pool = deleted_zfs_pools; + dictionary_del(zfs_pools, current_pool->name); + + deleted_zfs_pools = deleted_zfs_pools->next; + + freez(current_pool->name); + freez(current_pool); + } + + return 0; +} |