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0969a94bfc8dcd2ab9a969aed75617c6d63efdda
scoutfs/kmod/src/counters.h
Zach Brown 0969a94bfc Check one block_ref struct in block core 
Each of the different block types had a reading function that read a
block and then checked their reference struct for their block type.

This gets rid of each block reference type and has a single block_ref
type which is then checked by a single ref reading function in the block
core.  By putting ref checking in the core we no longer have to export
checking the block header crc, verifying headers, invalidating blocks,
or even reading raw blocks themseves.  Everyone reads refs and leaves
the checking up to the core.

The changes don't have a significant functional effect.  This is mostly
just changing types and moving code around.  (There are some changes to
visible counters.)

This shares code, which is nice, but this is putting the block reference
checking in one place in the block core so that in a few patches we can
fix problems with writers dirtying blocks that are being read.

Signed-off-by: Zach Brown <zab@versity.com>
2021-03-01 09:49:17 -08:00

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#ifndef _SCOUTFS_COUNTERS_H_
#define _SCOUTFS_COUNTERS_H_
#include <linux/kobject.h>
#include <linux/completion.h>
#include <linux/percpu_counter.h>
#include "super.h"
/*
* We only have to define each counter here and it'll be enumerated in
* other places by this macro. Don't forget to update LAST_COUNTER.
*/
#define EXPAND_EACH_COUNTER \
EXPAND_COUNTER(alloc_alloc_data) \
EXPAND_COUNTER(alloc_alloc_meta) \
EXPAND_COUNTER(alloc_free_data) \
EXPAND_COUNTER(alloc_free_meta) \
EXPAND_COUNTER(alloc_list_avail_lo) \
EXPAND_COUNTER(alloc_list_freed_hi) \
EXPAND_COUNTER(alloc_move) \
EXPAND_COUNTER(alloc_moved_extent) \
EXPAND_COUNTER(alloc_stale_list_block) \
EXPAND_COUNTER(block_cache_access_update) \
EXPAND_COUNTER(block_cache_alloc_failure) \
EXPAND_COUNTER(block_cache_alloc_page_order) \
EXPAND_COUNTER(block_cache_alloc_virt) \
EXPAND_COUNTER(block_cache_end_io_error) \
EXPAND_COUNTER(block_cache_forget) \
EXPAND_COUNTER(block_cache_free) \
EXPAND_COUNTER(block_cache_free_work) \
EXPAND_COUNTER(block_cache_remove_stale) \
EXPAND_COUNTER(block_cache_shrink) \
EXPAND_COUNTER(block_cache_shrink_next) \
EXPAND_COUNTER(block_cache_shrink_recent) \
EXPAND_COUNTER(block_cache_shrink_remove) \
EXPAND_COUNTER(block_cache_shrink_restart) \
EXPAND_COUNTER(btree_compact_values) \
EXPAND_COUNTER(btree_compact_values_enomem) \
EXPAND_COUNTER(btree_delete) \
EXPAND_COUNTER(btree_dirty) \
EXPAND_COUNTER(btree_force) \
EXPAND_COUNTER(btree_join) \
EXPAND_COUNTER(btree_insert) \
EXPAND_COUNTER(btree_leaf_item_hash_search) \
EXPAND_COUNTER(btree_lookup) \
EXPAND_COUNTER(btree_next) \
EXPAND_COUNTER(btree_prev) \
EXPAND_COUNTER(btree_split) \
EXPAND_COUNTER(btree_stale_read) \
EXPAND_COUNTER(btree_update) \
EXPAND_COUNTER(btree_walk) \
EXPAND_COUNTER(btree_walk_restart) \
EXPAND_COUNTER(client_farewell_error) \
EXPAND_COUNTER(corrupt_btree_block_level) \
EXPAND_COUNTER(corrupt_btree_no_child_ref) \
EXPAND_COUNTER(corrupt_dirent_backref_name_len) \
EXPAND_COUNTER(corrupt_dirent_name_len) \
EXPAND_COUNTER(corrupt_dirent_readdir_name_len) \
EXPAND_COUNTER(corrupt_inode_block_counts) \
EXPAND_COUNTER(corrupt_symlink_inode_size) \
EXPAND_COUNTER(corrupt_symlink_missing_item) \
EXPAND_COUNTER(corrupt_symlink_not_null_term) \
EXPAND_COUNTER(data_fallocate_enobufs_retry) \
EXPAND_COUNTER(data_write_begin_enobufs_retry) \
EXPAND_COUNTER(dentry_revalidate_error) \
EXPAND_COUNTER(dentry_revalidate_invalid) \
EXPAND_COUNTER(dentry_revalidate_locked) \
EXPAND_COUNTER(dentry_revalidate_orphan) \
EXPAND_COUNTER(dentry_revalidate_rcu) \
EXPAND_COUNTER(dentry_revalidate_root) \
EXPAND_COUNTER(dentry_revalidate_valid) \
EXPAND_COUNTER(dir_backref_excessive_retries) \
EXPAND_COUNTER(ext_op_insert) \
EXPAND_COUNTER(ext_op_next) \
EXPAND_COUNTER(ext_op_remove) \
EXPAND_COUNTER(forest_bloom_fail) \
EXPAND_COUNTER(forest_bloom_pass) \
EXPAND_COUNTER(forest_bloom_stale) \
EXPAND_COUNTER(forest_read_items) \
EXPAND_COUNTER(forest_roots_next_hint) \
EXPAND_COUNTER(forest_set_bloom_bits) \
EXPAND_COUNTER(item_clear_dirty) \
EXPAND_COUNTER(item_create) \
EXPAND_COUNTER(item_delete) \
EXPAND_COUNTER(item_dirty) \
EXPAND_COUNTER(item_invalidate) \
EXPAND_COUNTER(item_invalidate_page) \
EXPAND_COUNTER(item_lookup) \
EXPAND_COUNTER(item_mark_dirty) \
EXPAND_COUNTER(item_next) \
EXPAND_COUNTER(item_page_accessed) \
EXPAND_COUNTER(item_page_alloc) \
EXPAND_COUNTER(item_page_clear_dirty) \
EXPAND_COUNTER(item_page_compact) \
EXPAND_COUNTER(item_page_free) \
EXPAND_COUNTER(item_page_lru_add) \
EXPAND_COUNTER(item_page_lru_remove) \
EXPAND_COUNTER(item_page_mark_dirty) \
EXPAND_COUNTER(item_page_rbtree_walk) \
EXPAND_COUNTER(item_page_split) \
EXPAND_COUNTER(item_pcpu_add_replaced) \
EXPAND_COUNTER(item_pcpu_page_hit) \
EXPAND_COUNTER(item_pcpu_page_miss) \
EXPAND_COUNTER(item_pcpu_page_miss_keys) \
EXPAND_COUNTER(item_read_pages_split) \
EXPAND_COUNTER(item_shrink_page) \
EXPAND_COUNTER(item_shrink_page_dirty) \
EXPAND_COUNTER(item_shrink_page_reader) \
EXPAND_COUNTER(item_shrink_page_trylock) \
EXPAND_COUNTER(item_update) \
EXPAND_COUNTER(item_write_dirty) \
EXPAND_COUNTER(lock_alloc) \
EXPAND_COUNTER(lock_free) \
EXPAND_COUNTER(lock_grace_extended) \
EXPAND_COUNTER(lock_grace_set) \
EXPAND_COUNTER(lock_grace_wait) \
EXPAND_COUNTER(lock_grant_request) \
EXPAND_COUNTER(lock_grant_response) \
EXPAND_COUNTER(lock_grant_work) \
EXPAND_COUNTER(lock_invalidate_coverage) \
EXPAND_COUNTER(lock_invalidate_inode) \
EXPAND_COUNTER(lock_invalidate_request) \
EXPAND_COUNTER(lock_invalidate_response) \
EXPAND_COUNTER(lock_invalidate_sync) \
EXPAND_COUNTER(lock_invalidate_work) \
EXPAND_COUNTER(lock_lock) \
EXPAND_COUNTER(lock_lock_error) \
EXPAND_COUNTER(lock_nonblock_eagain) \
EXPAND_COUNTER(lock_recover_request) \
EXPAND_COUNTER(lock_shrink_attempted) \
EXPAND_COUNTER(lock_shrink_aborted) \
EXPAND_COUNTER(lock_shrink_work) \
EXPAND_COUNTER(lock_unlock) \
EXPAND_COUNTER(lock_wait) \
EXPAND_COUNTER(net_dropped_response) \
EXPAND_COUNTER(net_send_bytes) \
EXPAND_COUNTER(net_send_error) \
EXPAND_COUNTER(net_send_messages) \
EXPAND_COUNTER(net_recv_bytes) \
EXPAND_COUNTER(net_recv_dropped_duplicate) \
EXPAND_COUNTER(net_recv_error) \
EXPAND_COUNTER(net_recv_invalid_message) \
EXPAND_COUNTER(net_recv_messages) \
EXPAND_COUNTER(net_unknown_request) \
EXPAND_COUNTER(quorum_elected) \
EXPAND_COUNTER(quorum_fence_error) \
EXPAND_COUNTER(quorum_fence_leader) \
EXPAND_COUNTER(quorum_read_invalid_block) \
EXPAND_COUNTER(quorum_recv_error) \
EXPAND_COUNTER(quorum_recv_heartbeat) \
EXPAND_COUNTER(quorum_recv_invalid) \
EXPAND_COUNTER(quorum_recv_resignation) \
EXPAND_COUNTER(quorum_recv_vote) \
EXPAND_COUNTER(quorum_send_heartbeat) \
EXPAND_COUNTER(quorum_send_resignation) \
EXPAND_COUNTER(quorum_send_request) \
EXPAND_COUNTER(quorum_send_vote) \
EXPAND_COUNTER(quorum_server_shutdown) \
EXPAND_COUNTER(quorum_term_follower) \
EXPAND_COUNTER(server_commit_hold) \
EXPAND_COUNTER(server_commit_queue) \
EXPAND_COUNTER(server_commit_worker) \
EXPAND_COUNTER(srch_add_entry) \
EXPAND_COUNTER(srch_compact_dirty_block) \
EXPAND_COUNTER(srch_compact_entry) \
EXPAND_COUNTER(srch_compact_flush) \
EXPAND_COUNTER(srch_compact_log_page) \
EXPAND_COUNTER(srch_compact_removed_entry) \
EXPAND_COUNTER(srch_rotate_log) \
EXPAND_COUNTER(srch_search_log) \
EXPAND_COUNTER(srch_search_log_block) \
EXPAND_COUNTER(srch_search_retry_empty) \
EXPAND_COUNTER(srch_search_sorted) \
EXPAND_COUNTER(srch_search_sorted_block) \
EXPAND_COUNTER(srch_search_stale_eio) \
EXPAND_COUNTER(srch_search_stale_retry) \
EXPAND_COUNTER(srch_search_xattrs) \
EXPAND_COUNTER(srch_read_stale) \
EXPAND_COUNTER(statfs) \
EXPAND_COUNTER(trans_commit_data_alloc_low) \
EXPAND_COUNTER(trans_commit_dirty_meta_full) \
EXPAND_COUNTER(trans_commit_fsync) \
EXPAND_COUNTER(trans_commit_meta_alloc_low) \
EXPAND_COUNTER(trans_commit_sync_fs) \
EXPAND_COUNTER(trans_commit_timer) \
EXPAND_COUNTER(trans_commit_written)
#define FIRST_COUNTER alloc_alloc_data
#define LAST_COUNTER trans_commit_written
#undef EXPAND_COUNTER
#define EXPAND_COUNTER(which) struct percpu_counter which;
struct scoutfs_counters {
/* $sysfs/fs/scoutfs/$id/counters/ */
struct kobject kobj;
struct completion comp;
EXPAND_EACH_COUNTER
};
#define scoutfs_foreach_counter(sb, pcpu) \
for (pcpu = &SCOUTFS_SB(sb)->counters->FIRST_COUNTER; \
pcpu <= &SCOUTFS_SB(sb)->counters->LAST_COUNTER; \
pcpu++)
/*
* We always read with _sum, we have no use for the shared count and
* certainly don't want to pay the cost of a shared lock to update it.
* The default batch of 32 make counter increments show up significantly
* in profiles.
*/
#define SCOUTFS_PCPU_COUNTER_BATCH (1 << 30)
#define scoutfs_inc_counter(sb, which) \
__percpu_counter_add(&SCOUTFS_SB(sb)->counters->which, 1, \
SCOUTFS_PCPU_COUNTER_BATCH)
#define scoutfs_add_counter(sb, which, cnt) \
__percpu_counter_add(&SCOUTFS_SB(sb)->counters->which, cnt, \
SCOUTFS_PCPU_COUNTER_BATCH)
void __init scoutfs_init_counters(void);
int scoutfs_setup_counters(struct super_block *sb);
void scoutfs_destroy_counters(struct super_block *sb);
#endif
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