1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc. 4 * All Rights Reserved. 5 */ 6 #include "xfs.h" 7 8 struct xstats xfsstats; 9 10 static int counter_val(struct xfsstats __percpu *stats, int idx) 11 { 12 int val = 0, cpu; 13 14 for_each_possible_cpu(cpu) 15 val += *(((__u32 *)per_cpu_ptr(stats, cpu) + idx)); 16 return val; 17 } 18 19 int xfs_stats_format(struct xfsstats __percpu *stats, char *buf) 20 { 21 int i, j; 22 int len = 0; 23 uint64_t xs_xstrat_bytes = 0; 24 uint64_t xs_write_bytes = 0; 25 uint64_t xs_read_bytes = 0; 26 27 static const struct xstats_entry { 28 char *desc; 29 int endpoint; 30 } xstats[] = { 31 { "extent_alloc", xfsstats_offset(xs_abt_lookup) }, 32 { "abt", xfsstats_offset(xs_blk_mapr) }, 33 { "blk_map", xfsstats_offset(xs_bmbt_lookup) }, 34 { "bmbt", xfsstats_offset(xs_dir_lookup) }, 35 { "dir", xfsstats_offset(xs_trans_sync) }, 36 { "trans", xfsstats_offset(xs_ig_attempts) }, 37 { "ig", xfsstats_offset(xs_log_writes) }, 38 { "log", xfsstats_offset(xs_try_logspace)}, 39 { "push_ail", xfsstats_offset(xs_xstrat_quick)}, 40 { "xstrat", xfsstats_offset(xs_write_calls) }, 41 { "rw", xfsstats_offset(xs_attr_get) }, 42 { "attr", xfsstats_offset(xs_iflush_count)}, 43 { "icluster", xfsstats_offset(vn_active) }, 44 { "vnodes", xfsstats_offset(xb_get) }, 45 { "buf", xfsstats_offset(xs_abtb_2) }, 46 { "abtb2", xfsstats_offset(xs_abtc_2) }, 47 { "abtc2", xfsstats_offset(xs_bmbt_2) }, 48 { "bmbt2", xfsstats_offset(xs_ibt_2) }, 49 { "ibt2", xfsstats_offset(xs_fibt_2) }, 50 { "fibt2", xfsstats_offset(xs_rmap_2) }, 51 { "rmapbt", xfsstats_offset(xs_refcbt_2) }, 52 { "refcntbt", xfsstats_offset(xs_qm_dqreclaims)}, 53 /* we print both series of quota information together */ 54 { "qm", xfsstats_offset(xs_xstrat_bytes)}, 55 }; 56 57 /* Loop over all stats groups */ 58 59 for (i = j = 0; i < ARRAY_SIZE(xstats); i++) { 60 len += scnprintf(buf + len, PATH_MAX - len, "%s", 61 xstats[i].desc); 62 /* inner loop does each group */ 63 for (; j < xstats[i].endpoint; j++) 64 len += scnprintf(buf + len, PATH_MAX - len, " %u", 65 counter_val(stats, j)); 66 len += scnprintf(buf + len, PATH_MAX - len, "\n"); 67 } 68 /* extra precision counters */ 69 for_each_possible_cpu(i) { 70 xs_xstrat_bytes += per_cpu_ptr(stats, i)->s.xs_xstrat_bytes; 71 xs_write_bytes += per_cpu_ptr(stats, i)->s.xs_write_bytes; 72 xs_read_bytes += per_cpu_ptr(stats, i)->s.xs_read_bytes; 73 } 74 75 len += scnprintf(buf + len, PATH_MAX-len, "xpc %Lu %Lu %Lu\n", 76 xs_xstrat_bytes, xs_write_bytes, xs_read_bytes); 77 len += scnprintf(buf + len, PATH_MAX-len, "debug %u\n", 78 #if defined(DEBUG) 79 1); 80 #else 81 0); 82 #endif 83 84 return len; 85 } 86 87 void xfs_stats_clearall(struct xfsstats __percpu *stats) 88 { 89 int c; 90 uint32_t vn_active; 91 92 xfs_notice(NULL, "Clearing xfsstats"); 93 for_each_possible_cpu(c) { 94 preempt_disable(); 95 /* save vn_active, it's a universal truth! */ 96 vn_active = per_cpu_ptr(stats, c)->s.vn_active; 97 memset(per_cpu_ptr(stats, c), 0, sizeof(*stats)); 98 per_cpu_ptr(stats, c)->s.vn_active = vn_active; 99 preempt_enable(); 100 } 101 } 102 103 #ifdef CONFIG_PROC_FS 104 /* legacy quota interfaces */ 105 #ifdef CONFIG_XFS_QUOTA 106 107 #define XFSSTAT_START_XQMSTAT xfsstats_offset(xs_qm_dqreclaims) 108 #define XFSSTAT_END_XQMSTAT xfsstats_offset(xs_qm_dquot) 109 110 static int xqm_proc_show(struct seq_file *m, void *v) 111 { 112 /* maximum; incore; ratio free to inuse; freelist */ 113 seq_printf(m, "%d\t%d\t%d\t%u\n", 114 0, counter_val(xfsstats.xs_stats, XFSSTAT_END_XQMSTAT), 115 0, counter_val(xfsstats.xs_stats, XFSSTAT_END_XQMSTAT + 1)); 116 return 0; 117 } 118 119 /* legacy quota stats interface no 2 */ 120 static int xqmstat_proc_show(struct seq_file *m, void *v) 121 { 122 int j; 123 124 seq_printf(m, "qm"); 125 for (j = XFSSTAT_START_XQMSTAT; j < XFSSTAT_END_XQMSTAT; j++) 126 seq_printf(m, " %u", counter_val(xfsstats.xs_stats, j)); 127 seq_putc(m, '\n'); 128 return 0; 129 } 130 #endif /* CONFIG_XFS_QUOTA */ 131 132 int 133 xfs_init_procfs(void) 134 { 135 if (!proc_mkdir("fs/xfs", NULL)) 136 return -ENOMEM; 137 138 if (!proc_symlink("fs/xfs/stat", NULL, 139 "/sys/fs/xfs/stats/stats")) 140 goto out; 141 142 #ifdef CONFIG_XFS_QUOTA 143 if (!proc_create_single("fs/xfs/xqmstat", 0, NULL, xqmstat_proc_show)) 144 goto out; 145 if (!proc_create_single("fs/xfs/xqm", 0, NULL, xqm_proc_show)) 146 goto out; 147 #endif 148 return 0; 149 150 out: 151 remove_proc_subtree("fs/xfs", NULL); 152 return -ENOMEM; 153 } 154 155 void 156 xfs_cleanup_procfs(void) 157 { 158 remove_proc_subtree("fs/xfs", NULL); 159 } 160 #endif /* CONFIG_PROC_FS */ 161