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 21DEFINE_PER_CPU(struct xfsstats, xfsstats); 22 23STATIC int 24xfs_read_xfsstats( 25 char *buffer, 26 char **start, 27 off_t offset, 28 int count, 29 int *eof, 30 void *data) 31{ 32 int c, i, j, len, val; 33 __uint64_t xs_xstrat_bytes = 0; 34 __uint64_t xs_write_bytes = 0; 35 __uint64_t xs_read_bytes = 0; 36 37 static const struct xstats_entry { 38 char *desc; 39 int endpoint; 40 } xstats[] = { 41 { "extent_alloc", XFSSTAT_END_EXTENT_ALLOC }, 42 { "abt", XFSSTAT_END_ALLOC_BTREE }, 43 { "blk_map", XFSSTAT_END_BLOCK_MAPPING }, 44 { "bmbt", XFSSTAT_END_BLOCK_MAP_BTREE }, 45 { "dir", XFSSTAT_END_DIRECTORY_OPS }, 46 { "trans", XFSSTAT_END_TRANSACTIONS }, 47 { "ig", XFSSTAT_END_INODE_OPS }, 48 { "log", XFSSTAT_END_LOG_OPS }, 49 { "push_ail", XFSSTAT_END_TAIL_PUSHING }, 50 { "xstrat", XFSSTAT_END_WRITE_CONVERT }, 51 { "rw", XFSSTAT_END_READ_WRITE_OPS }, 52 { "attr", XFSSTAT_END_ATTRIBUTE_OPS }, 53 { "icluster", XFSSTAT_END_INODE_CLUSTER }, 54 { "vnodes", XFSSTAT_END_VNODE_OPS }, 55 { "buf", XFSSTAT_END_BUF }, 56 }; 57 58 /* Loop over all stats groups */ 59 for (i=j=len = 0; i < ARRAY_SIZE(xstats); i++) { 60 len += sprintf(buffer + len, xstats[i].desc); 61 /* inner loop does each group */ 62 while (j < xstats[i].endpoint) { 63 val = 0; 64 /* sum over all cpus */ 65 for_each_possible_cpu(c) 66 val += *(((__u32*)&per_cpu(xfsstats, c) + j)); 67 len += sprintf(buffer + len, " %u", val); 68 j++; 69 } 70 buffer[len++] = '\n'; 71 } 72 /* extra precision counters */ 73 for_each_possible_cpu(i) { 74 xs_xstrat_bytes += per_cpu(xfsstats, i).xs_xstrat_bytes; 75 xs_write_bytes += per_cpu(xfsstats, i).xs_write_bytes; 76 xs_read_bytes += per_cpu(xfsstats, i).xs_read_bytes; 77 } 78 79 len += sprintf(buffer + len, "xpc %Lu %Lu %Lu\n", 80 xs_xstrat_bytes, xs_write_bytes, xs_read_bytes); 81 len += sprintf(buffer + len, "debug %u\n", 82#if defined(DEBUG) 83 1); 84#else 85 0); 86#endif 87 88 if (offset >= len) { 89 *start = buffer; 90 *eof = 1; 91 return 0; 92 } 93 *start = buffer + offset; 94 if ((len -= offset) > count) 95 return count; 96 *eof = 1; 97 98 return len; 99} 100 101void 102xfs_init_procfs(void) 103{ 104 if (!proc_mkdir("fs/xfs", NULL)) 105 return; 106 create_proc_read_entry("fs/xfs/stat", 0, NULL, xfs_read_xfsstats, NULL); 107} 108 109void 110xfs_cleanup_procfs(void) 111{ 112 remove_proc_entry("fs/xfs/stat", NULL); 113 remove_proc_entry("fs/xfs", NULL); 114} 115