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 #include <linux/proc_fs.h> 8 9 struct xstats xfsstats; 10 11 static int counter_val(struct xfsstats __percpu *stats, int idx) 12 { 13 int val = 0, cpu; 14 15 for_each_possible_cpu(cpu) 16 val += *(((__u32 *)per_cpu_ptr(stats, cpu) + idx)); 17 return val; 18 } 19 20 int xfs_stats_format(struct xfsstats __percpu *stats, char *buf) 21 { 22 int i, j; 23 int len = 0; 24 uint64_t xs_xstrat_bytes = 0; 25 uint64_t xs_write_bytes = 0; 26 uint64_t xs_read_bytes = 0; 27 28 static const struct xstats_entry { 29 char *desc; 30 int endpoint; 31 } xstats[] = { 32 { "extent_alloc", xfsstats_offset(xs_abt_lookup) }, 33 { "abt", xfsstats_offset(xs_blk_mapr) }, 34 { "blk_map", xfsstats_offset(xs_bmbt_lookup) }, 35 { "bmbt", xfsstats_offset(xs_dir_lookup) }, 36 { "dir", xfsstats_offset(xs_trans_sync) }, 37 { "trans", xfsstats_offset(xs_ig_attempts) }, 38 { "ig", xfsstats_offset(xs_log_writes) }, 39 { "log", xfsstats_offset(xs_try_logspace)}, 40 { "push_ail", xfsstats_offset(xs_xstrat_quick)}, 41 { "xstrat", xfsstats_offset(xs_write_calls) }, 42 { "rw", xfsstats_offset(xs_attr_get) }, 43 { "attr", xfsstats_offset(xs_iflush_count)}, 44 { "icluster", xfsstats_offset(vn_active) }, 45 { "vnodes", xfsstats_offset(xb_get) }, 46 { "buf", xfsstats_offset(xs_abtb_2) }, 47 { "abtb2", xfsstats_offset(xs_abtc_2) }, 48 { "abtc2", xfsstats_offset(xs_bmbt_2) }, 49 { "bmbt2", xfsstats_offset(xs_ibt_2) }, 50 { "ibt2", xfsstats_offset(xs_fibt_2) }, 51 { "fibt2", xfsstats_offset(xs_rmap_2) }, 52 { "rmapbt", xfsstats_offset(xs_refcbt_2) }, 53 { "refcntbt", xfsstats_offset(xs_qm_dqreclaims)}, 54 /* we print both series of quota information together */ 55 { "qm", xfsstats_offset(xs_xstrat_bytes)}, 56 }; 57 58 /* Loop over all stats groups */ 59 60 for (i = j = 0; i < ARRAY_SIZE(xstats); i++) { 61 len += snprintf(buf + len, PATH_MAX - len, "%s", 62 xstats[i].desc); 63 /* inner loop does each group */ 64 for (; j < xstats[i].endpoint; j++) 65 len += snprintf(buf + len, PATH_MAX - len, " %u", 66 counter_val(stats, j)); 67 len += snprintf(buf + len, PATH_MAX - len, "\n"); 68 } 69 /* extra precision counters */ 70 for_each_possible_cpu(i) { 71 xs_xstrat_bytes += per_cpu_ptr(stats, i)->s.xs_xstrat_bytes; 72 xs_write_bytes += per_cpu_ptr(stats, i)->s.xs_write_bytes; 73 xs_read_bytes += per_cpu_ptr(stats, i)->s.xs_read_bytes; 74 } 75 76 len += snprintf(buf + len, PATH_MAX-len, "xpc %Lu %Lu %Lu\n", 77 xs_xstrat_bytes, xs_write_bytes, xs_read_bytes); 78 len += snprintf(buf + len, PATH_MAX-len, "debug %u\n", 79 #if defined(DEBUG) 80 1); 81 #else 82 0); 83 #endif 84 85 return len; 86 } 87 88 void xfs_stats_clearall(struct xfsstats __percpu *stats) 89 { 90 int c; 91 uint32_t vn_active; 92 93 xfs_notice(NULL, "Clearing xfsstats"); 94 for_each_possible_cpu(c) { 95 preempt_disable(); 96 /* save vn_active, it's a universal truth! */ 97 vn_active = per_cpu_ptr(stats, c)->s.vn_active; 98 memset(per_cpu_ptr(stats, c), 0, sizeof(*stats)); 99 per_cpu_ptr(stats, c)->s.vn_active = vn_active; 100 preempt_enable(); 101 } 102 } 103 104 #ifdef CONFIG_PROC_FS 105 /* legacy quota interfaces */ 106 #ifdef CONFIG_XFS_QUOTA 107 108 #define XFSSTAT_START_XQMSTAT xfsstats_offset(xs_qm_dqreclaims) 109 #define XFSSTAT_END_XQMSTAT xfsstats_offset(xs_qm_dquot) 110 111 static int xqm_proc_show(struct seq_file *m, void *v) 112 { 113 /* maximum; incore; ratio free to inuse; freelist */ 114 seq_printf(m, "%d\t%d\t%d\t%u\n", 115 0, counter_val(xfsstats.xs_stats, XFSSTAT_END_XQMSTAT), 116 0, counter_val(xfsstats.xs_stats, XFSSTAT_END_XQMSTAT + 1)); 117 return 0; 118 } 119 120 /* legacy quota stats interface no 2 */ 121 static int xqmstat_proc_show(struct seq_file *m, void *v) 122 { 123 int j; 124 125 seq_printf(m, "qm"); 126 for (j = XFSSTAT_START_XQMSTAT; j < XFSSTAT_END_XQMSTAT; j++) 127 seq_printf(m, " %u", counter_val(xfsstats.xs_stats, j)); 128 seq_putc(m, '\n'); 129 return 0; 130 } 131 #endif /* CONFIG_XFS_QUOTA */ 132 133 int 134 xfs_init_procfs(void) 135 { 136 if (!proc_mkdir("fs/xfs", NULL)) 137 return -ENOMEM; 138 139 if (!proc_symlink("fs/xfs/stat", NULL, 140 "/sys/fs/xfs/stats/stats")) 141 goto out; 142 143 #ifdef CONFIG_XFS_QUOTA 144 if (!proc_create_single("fs/xfs/xqmstat", 0, NULL, xqmstat_proc_show)) 145 goto out; 146 if (!proc_create_single("fs/xfs/xqm", 0, NULL, xqm_proc_show)) 147 goto out; 148 #endif 149 return 0; 150 151 out: 152 remove_proc_subtree("fs/xfs", NULL); 153 return -ENOMEM; 154 } 155 156 void 157 xfs_cleanup_procfs(void) 158 { 159 remove_proc_subtree("fs/xfs", NULL); 160 } 161 #endif /* CONFIG_PROC_FS */ 162