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 { "rmapbt", XFSSTAT_END_RMAP_V2 }, 65 { "refcntbt", XFSSTAT_END_REFCOUNT }, 66 /* we print both series of quota information together */ 67 { "qm", XFSSTAT_END_QM }, 68 }; 69 70 /* Loop over all stats groups */ 71 72 for (i = j = 0; i < ARRAY_SIZE(xstats); i++) { 73 len += snprintf(buf + len, PATH_MAX - len, "%s", 74 xstats[i].desc); 75 /* inner loop does each group */ 76 for (; j < xstats[i].endpoint; j++) 77 len += snprintf(buf + len, PATH_MAX - len, " %u", 78 counter_val(stats, j)); 79 len += snprintf(buf + len, PATH_MAX - len, "\n"); 80 } 81 /* extra precision counters */ 82 for_each_possible_cpu(i) { 83 xs_xstrat_bytes += per_cpu_ptr(stats, i)->xs_xstrat_bytes; 84 xs_write_bytes += per_cpu_ptr(stats, i)->xs_write_bytes; 85 xs_read_bytes += per_cpu_ptr(stats, i)->xs_read_bytes; 86 } 87 88 len += snprintf(buf + len, PATH_MAX-len, "xpc %Lu %Lu %Lu\n", 89 xs_xstrat_bytes, xs_write_bytes, xs_read_bytes); 90 len += snprintf(buf + len, PATH_MAX-len, "debug %u\n", 91 #if defined(DEBUG) 92 1); 93 #else 94 0); 95 #endif 96 97 return len; 98 } 99 100 void xfs_stats_clearall(struct xfsstats __percpu *stats) 101 { 102 int c; 103 __uint32_t vn_active; 104 105 xfs_notice(NULL, "Clearing xfsstats"); 106 for_each_possible_cpu(c) { 107 preempt_disable(); 108 /* save vn_active, it's a universal truth! */ 109 vn_active = per_cpu_ptr(stats, c)->vn_active; 110 memset(per_cpu_ptr(stats, c), 0, sizeof(*stats)); 111 per_cpu_ptr(stats, c)->vn_active = vn_active; 112 preempt_enable(); 113 } 114 } 115 116 /* legacy quota interfaces */ 117 #ifdef CONFIG_XFS_QUOTA 118 static int xqm_proc_show(struct seq_file *m, void *v) 119 { 120 /* maximum; incore; ratio free to inuse; freelist */ 121 seq_printf(m, "%d\t%d\t%d\t%u\n", 122 0, counter_val(xfsstats.xs_stats, XFSSTAT_END_XQMSTAT), 123 0, counter_val(xfsstats.xs_stats, XFSSTAT_END_XQMSTAT + 1)); 124 return 0; 125 } 126 127 static int xqm_proc_open(struct inode *inode, struct file *file) 128 { 129 return single_open(file, xqm_proc_show, NULL); 130 } 131 132 static const struct file_operations xqm_proc_fops = { 133 .open = xqm_proc_open, 134 .read = seq_read, 135 .llseek = seq_lseek, 136 .release = single_release, 137 }; 138 139 /* legacy quota stats interface no 2 */ 140 static int xqmstat_proc_show(struct seq_file *m, void *v) 141 { 142 int j; 143 144 seq_printf(m, "qm"); 145 for (j = XFSSTAT_END_IBT_V2; j < XFSSTAT_END_XQMSTAT; j++) 146 seq_printf(m, " %u", counter_val(xfsstats.xs_stats, j)); 147 seq_putc(m, '\n'); 148 return 0; 149 } 150 151 static int xqmstat_proc_open(struct inode *inode, struct file *file) 152 { 153 return single_open(file, xqmstat_proc_show, NULL); 154 } 155 156 static const struct file_operations xqmstat_proc_fops = { 157 .owner = THIS_MODULE, 158 .open = xqmstat_proc_open, 159 .read = seq_read, 160 .llseek = seq_lseek, 161 .release = single_release, 162 }; 163 #endif /* CONFIG_XFS_QUOTA */ 164 165 #ifdef CONFIG_PROC_FS 166 int 167 xfs_init_procfs(void) 168 { 169 if (!proc_mkdir("fs/xfs", NULL)) 170 return -ENOMEM; 171 172 if (!proc_symlink("fs/xfs/stat", NULL, 173 "/sys/fs/xfs/stats/stats")) 174 goto out; 175 176 #ifdef CONFIG_XFS_QUOTA 177 if (!proc_create("fs/xfs/xqmstat", 0, NULL, 178 &xqmstat_proc_fops)) 179 goto out; 180 if (!proc_create("fs/xfs/xqm", 0, NULL, 181 &xqm_proc_fops)) 182 goto out; 183 #endif 184 return 0; 185 186 out: 187 remove_proc_subtree("fs/xfs", NULL); 188 return -ENOMEM; 189 } 190 191 void 192 xfs_cleanup_procfs(void) 193 { 194 remove_proc_subtree("fs/xfs", NULL); 195 } 196 #endif /* CONFIG_PROC_FS */ 197