xfs_zone_info.c

  1// SPDX-License-Identifier: GPL-2.0
  2/*
  3 * Copyright (c) 2023-2025 Christoph Hellwig.
  4 * Copyright (c) 2024-2025, Western Digital Corporation or its affiliates.
  5 */
  6#include "xfs.h"
  7#include "xfs_shared.h"
  8#include "xfs_format.h"
  9#include "xfs_trans_resv.h"
 10#include "xfs_mount.h"
 11#include "xfs_inode.h"
 12#include "xfs_rtgroup.h"
 13#include "xfs_zone_alloc.h"
 14#include "xfs_zone_priv.h"
 15
 16static const char xfs_write_hint_shorthand[6][16] = {
 17	"NOT_SET", "NONE", "SHORT", "MEDIUM", "LONG", "EXTREME"};
 18
 19static inline const char *
 20xfs_write_hint_to_str(
 21	uint8_t			write_hint)
 22{
 23	if (write_hint > WRITE_LIFE_EXTREME)
 24		return "UNKNOWN";
 25	return xfs_write_hint_shorthand[write_hint];
 26}
 27
 28static void
 29xfs_show_open_zone(
 30	struct seq_file		*m,
 31	struct xfs_open_zone	*oz)
 32{
 33	seq_printf(m, "\t  zone %d, wp %u, written %u, used %u, hint %s\n",
 34		rtg_rgno(oz->oz_rtg),
 35		oz->oz_allocated, oz->oz_written,
 36		rtg_rmap(oz->oz_rtg)->i_used_blocks,
 37		xfs_write_hint_to_str(oz->oz_write_hint));
 38}
 39
 40static void
 41xfs_show_full_zone_used_distribution(
 42	struct seq_file         *m,
 43	struct xfs_mount        *mp)
 44{
 45	struct xfs_zone_info	*zi = mp->m_zone_info;
 46	unsigned int		reclaimable = 0, full, i;
 47
 48	spin_lock(&zi->zi_used_buckets_lock);
 49	for (i = 0; i < XFS_ZONE_USED_BUCKETS; i++) {
 50		unsigned int entries = zi->zi_used_bucket_entries[i];
 51
 52		seq_printf(m, "\t  %2u..%2u%%: %u\n",
 53				i * (100 / XFS_ZONE_USED_BUCKETS),
 54				(i + 1) * (100 / XFS_ZONE_USED_BUCKETS) - 1,
 55				entries);
 56		reclaimable += entries;
 57	}
 58	spin_unlock(&zi->zi_used_buckets_lock);
 59
 60	full = mp->m_sb.sb_rgcount;
 61	if (zi->zi_open_gc_zone)
 62		full--;
 63	full -= zi->zi_nr_open_zones;
 64	full -= atomic_read(&zi->zi_nr_free_zones);
 65	full -= reclaimable;
 66
 67	seq_printf(m, "\t     100%%: %u\n", full);
 68}
 69
 70void
 71xfs_zoned_show_stats(
 72	struct seq_file		*m,
 73	struct xfs_mount	*mp)
 74{
 75	struct xfs_zone_info	*zi = mp->m_zone_info;
 76	struct xfs_open_zone	*oz;
 77
 78	seq_puts(m, "\n");
 79
 80	seq_printf(m, "\tuser free RT blocks: %lld\n",
 81		xfs_sum_freecounter(mp, XC_FREE_RTEXTENTS));
 82	seq_printf(m, "\treserved free RT blocks: %lld\n",
 83		mp->m_free[XC_FREE_RTEXTENTS].res_avail);
 84	seq_printf(m, "\tuser available RT blocks: %lld\n",
 85		xfs_sum_freecounter(mp, XC_FREE_RTAVAILABLE));
 86	seq_printf(m, "\treserved available RT blocks: %lld\n",
 87		mp->m_free[XC_FREE_RTAVAILABLE].res_avail);
 88	seq_printf(m, "\tRT reservations required: %d\n",
 89		!list_empty_careful(&zi->zi_reclaim_reservations));
 90	seq_printf(m, "\tRT GC required: %d\n",
 91		xfs_zoned_need_gc(mp));
 92
 93	seq_printf(m, "\tfree zones: %d\n", atomic_read(&zi->zi_nr_free_zones));
 94	seq_puts(m, "\topen zones:\n");
 95	spin_lock(&zi->zi_open_zones_lock);
 96	list_for_each_entry(oz, &zi->zi_open_zones, oz_entry)
 97		xfs_show_open_zone(m, oz);
 98	if (zi->zi_open_gc_zone) {
 99		seq_puts(m, "\topen gc zone:\n");
100		xfs_show_open_zone(m, zi->zi_open_gc_zone);
101	}
102	spin_unlock(&zi->zi_open_zones_lock);
103	seq_puts(m, "\tused blocks distribution (fully written zones):\n");
104	xfs_show_full_zone_used_distribution(m, mp);
105}