1 /* 2 * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc. 3 * All Rights Reserved. 4 * 5 * This program is free software; you can redistribute it and/or 6 * modify it under the terms of the GNU General Public License as 7 * published by the Free Software Foundation. 8 * 9 * This program is distributed in the hope that it would be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not, write the Free Software Foundation, 16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 17 */ 18 #include "xfs.h" 19 #include <linux/proc_fs.h> 20 21 struct xstats xfsstats; 22 23 static int counter_val(struct xfsstats __percpu *stats, int idx) 24 { 25 int val = 0, cpu; 26 27 for_each_possible_cpu(cpu) 28 val += *(((__u32 *)per_cpu_ptr(stats, cpu) + idx)); 29 return val; 30 } 31 32 int xfs_stats_format(struct xfsstats __percpu *stats, char *buf) 33 { 34 int i, j; 35 int len = 0; 36 __uint64_t xs_xstrat_bytes = 0; 37 __uint64_t xs_write_bytes = 0; 38 __uint64_t xs_read_bytes = 0; 39 40 static const struct xstats_entry { 41 char *desc; 42 int endpoint; 43 } xstats[] = { 44 { "extent_alloc", XFSSTAT_END_EXTENT_ALLOC }, 45 { "abt", XFSSTAT_END_ALLOC_BTREE }, 46 { "blk_map", XFSSTAT_END_BLOCK_MAPPING }, 47 { "bmbt", XFSSTAT_END_BLOCK_MAP_BTREE }, 48 { "dir", XFSSTAT_END_DIRECTORY_OPS }, 49 { "trans", XFSSTAT_END_TRANSACTIONS }, 50 { "ig", XFSSTAT_END_INODE_OPS }, 51 { "log", XFSSTAT_END_LOG_OPS }, 52 { "push_ail", XFSSTAT_END_TAIL_PUSHING }, 53 { "xstrat", XFSSTAT_END_WRITE_CONVERT }, 54 { "rw", XFSSTAT_END_READ_WRITE_OPS }, 55 { "attr", XFSSTAT_END_ATTRIBUTE_OPS }, 56 { "icluster", XFSSTAT_END_INODE_CLUSTER }, 57 { "vnodes", XFSSTAT_END_VNODE_OPS }, 58 { "buf", XFSSTAT_END_BUF }, 59 { "abtb2", XFSSTAT_END_ABTB_V2 }, 60 { "abtc2", XFSSTAT_END_ABTC_V2 }, 61 { "bmbt2", XFSSTAT_END_BMBT_V2 }, 62 { "ibt2", XFSSTAT_END_IBT_V2 }, 63 { "fibt2", XFSSTAT_END_FIBT_V2 }, 64 /* we print both series of quota information together */ 65 { "qm", XFSSTAT_END_QM }, 66 }; 67 68 /* Loop over all stats groups */ 69 70 for (i = j = 0; i < ARRAY_SIZE(xstats); i++) { 71 len += snprintf(buf + len, PATH_MAX - len, "%s", 72 xstats[i].desc); 73 /* inner loop does each group */ 74 for (; j < xstats[i].endpoint; j++) 75 len += snprintf(buf + len, PATH_MAX - len, " %u", 76 counter_val(stats, j)); 77 len += snprintf(buf + len, PATH_MAX - len, "\n"); 78 } 79 /* extra precision counters */ 80 for_each_possible_cpu(i) { 81 xs_xstrat_bytes += per_cpu_ptr(stats, i)->xs_xstrat_bytes; 82 xs_write_bytes += per_cpu_ptr(stats, i)->xs_write_bytes; 83 xs_read_bytes += per_cpu_ptr(stats, i)->xs_read_bytes; 84 } 85 86 len += snprintf(buf + len, PATH_MAX-len, "xpc %Lu %Lu %Lu\n", 87 xs_xstrat_bytes, xs_write_bytes, xs_read_bytes); 88 len += snprintf(buf + len, PATH_MAX-len, "debug %u\n", 89 #if defined(DEBUG) 90 1); 91 #else 92 0); 93 #endif 94 95 return len; 96 } 97 98 void xfs_stats_clearall(struct xfsstats __percpu *stats) 99 { 100 int c; 101 __uint32_t vn_active; 102 103 xfs_notice(NULL, "Clearing xfsstats"); 104 for_each_possible_cpu(c) { 105 preempt_disable(); 106 /* save vn_active, it's a universal truth! */ 107 vn_active = per_cpu_ptr(stats, c)->vn_active; 108 memset(per_cpu_ptr(stats, c), 0, sizeof(*stats)); 109 per_cpu_ptr(stats, c)->vn_active = vn_active; 110 preempt_enable(); 111 } 112 } 113 114 /* legacy quota interfaces */ 115 #ifdef CONFIG_XFS_QUOTA 116 static int xqm_proc_show(struct seq_file *m, void *v) 117 { 118 /* maximum; incore; ratio free to inuse; freelist */ 119 seq_printf(m, "%d\t%d\t%d\t%u\n", 120 0, counter_val(xfsstats.xs_stats, XFSSTAT_END_XQMSTAT), 121 0, counter_val(xfsstats.xs_stats, XFSSTAT_END_XQMSTAT + 1)); 122 return 0; 123 } 124 125 static int xqm_proc_open(struct inode *inode, struct file *file) 126 { 127 return single_open(file, xqm_proc_show, NULL); 128 } 129 130 static const struct file_operations xqm_proc_fops = { 131 .owner = THIS_MODULE, 132 .open = xqm_proc_open, 133 .read = seq_read, 134 .llseek = seq_lseek, 135 .release = single_release, 136 }; 137 138 /* legacy quota stats interface no 2 */ 139 static int xqmstat_proc_show(struct seq_file *m, void *v) 140 { 141 int j; 142 143 seq_printf(m, "qm"); 144 for (j = XFSSTAT_END_IBT_V2; j < XFSSTAT_END_XQMSTAT; j++) 145 seq_printf(m, " %u", counter_val(xfsstats.xs_stats, j)); 146 seq_putc(m, '\n'); 147 return 0; 148 } 149 150 static int xqmstat_proc_open(struct inode *inode, struct file *file) 151 { 152 return single_open(file, xqmstat_proc_show, NULL); 153 } 154 155 static const struct file_operations xqmstat_proc_fops = { 156 .owner = THIS_MODULE, 157 .open = xqmstat_proc_open, 158 .read = seq_read, 159 .llseek = seq_lseek, 160 .release = single_release, 161 }; 162 #endif /* CONFIG_XFS_QUOTA */ 163 164 #ifdef CONFIG_PROC_FS 165 int 166 xfs_init_procfs(void) 167 { 168 if (!proc_mkdir("fs/xfs", NULL)) 169 return -ENOMEM; 170 171 if (!proc_symlink("fs/xfs/stat", NULL, 172 "/sys/fs/xfs/stats/stats")) 173 goto out; 174 175 #ifdef CONFIG_XFS_QUOTA 176 if (!proc_create("fs/xfs/xqmstat", 0, NULL, 177 &xqmstat_proc_fops)) 178 goto out; 179 if (!proc_create("fs/xfs/xqm", 0, NULL, 180 &xqm_proc_fops)) 181 goto out; 182 #endif 183 return 0; 184 185 out: 186 remove_proc_subtree("fs/xfs", NULL); 187 return -ENOMEM; 188 } 189 190 void 191 xfs_cleanup_procfs(void) 192 { 193 remove_proc_subtree("fs/xfs", NULL); 194 } 195 #endif /* CONFIG_PROC_FS */ 196