diff options
Diffstat (limited to 'fs/xfs/xfs_stats.c')
| -rw-r--r-- | fs/xfs/xfs_stats.c | 195 |
1 files changed, 195 insertions, 0 deletions
diff --git a/fs/xfs/xfs_stats.c b/fs/xfs/xfs_stats.c new file mode 100644 index 000000000000..8686df6c7609 --- /dev/null +++ b/fs/xfs/xfs_stats.c @@ -0,0 +1,195 @@ +/* + * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc. + * All Rights Reserved. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it would be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ +#include "xfs.h" +#include <linux/proc_fs.h> + +struct xstats xfsstats; + +static int counter_val(struct xfsstats __percpu *stats, int idx) +{ + int val = 0, cpu; + + for_each_possible_cpu(cpu) + val += *(((__u32 *)per_cpu_ptr(stats, cpu) + idx)); + return val; +} + +int xfs_stats_format(struct xfsstats __percpu *stats, char *buf) +{ + int i, j; + int len = 0; + __uint64_t xs_xstrat_bytes = 0; + __uint64_t xs_write_bytes = 0; + __uint64_t xs_read_bytes = 0; + + static const struct xstats_entry { + char *desc; + int endpoint; + } xstats[] = { + { "extent_alloc", XFSSTAT_END_EXTENT_ALLOC }, + { "abt", XFSSTAT_END_ALLOC_BTREE }, + { "blk_map", XFSSTAT_END_BLOCK_MAPPING }, + { "bmbt", XFSSTAT_END_BLOCK_MAP_BTREE }, + { "dir", XFSSTAT_END_DIRECTORY_OPS }, + { "trans", XFSSTAT_END_TRANSACTIONS }, + { "ig", XFSSTAT_END_INODE_OPS }, + { "log", XFSSTAT_END_LOG_OPS }, + { "push_ail", XFSSTAT_END_TAIL_PUSHING }, + { "xstrat", XFSSTAT_END_WRITE_CONVERT }, + { "rw", XFSSTAT_END_READ_WRITE_OPS }, + { "attr", XFSSTAT_END_ATTRIBUTE_OPS }, + { "icluster", XFSSTAT_END_INODE_CLUSTER }, + { "vnodes", XFSSTAT_END_VNODE_OPS }, + { "buf", XFSSTAT_END_BUF }, + { "abtb2", XFSSTAT_END_ABTB_V2 }, + { "abtc2", XFSSTAT_END_ABTC_V2 }, + { "bmbt2", XFSSTAT_END_BMBT_V2 }, + { "ibt2", XFSSTAT_END_IBT_V2 }, + { "fibt2", XFSSTAT_END_FIBT_V2 }, + /* we print both series of quota information together */ + { "qm", XFSSTAT_END_QM }, + }; + + /* Loop over all stats groups */ + + for (i = j = 0; i < ARRAY_SIZE(xstats); i++) { + len += snprintf(buf + len, PATH_MAX - len, "%s", + xstats[i].desc); + /* inner loop does each group */ + for (; j < xstats[i].endpoint; j++) + len += snprintf(buf + len, PATH_MAX - len, " %u", + counter_val(stats, j)); + len += snprintf(buf + len, PATH_MAX - len, "\n"); + } + /* extra precision counters */ + for_each_possible_cpu(i) { + xs_xstrat_bytes += per_cpu_ptr(stats, i)->xs_xstrat_bytes; + xs_write_bytes += per_cpu_ptr(stats, i)->xs_write_bytes; + xs_read_bytes += per_cpu_ptr(stats, i)->xs_read_bytes; + } + + len += snprintf(buf + len, PATH_MAX-len, "xpc %Lu %Lu %Lu\n", + xs_xstrat_bytes, xs_write_bytes, xs_read_bytes); + len += snprintf(buf + len, PATH_MAX-len, "debug %u\n", +#if defined(DEBUG) + 1); +#else + 0); +#endif + + return len; +} + +void xfs_stats_clearall(struct xfsstats __percpu *stats) +{ + int c; + __uint32_t vn_active; + + xfs_notice(NULL, "Clearing xfsstats"); + for_each_possible_cpu(c) { + preempt_disable(); + /* save vn_active, it's a universal truth! */ + vn_active = per_cpu_ptr(stats, c)->vn_active; + memset(per_cpu_ptr(stats, c), 0, sizeof(*stats)); + per_cpu_ptr(stats, c)->vn_active = vn_active; + preempt_enable(); + } +} + +/* legacy quota interfaces */ +#ifdef CONFIG_XFS_QUOTA +static int xqm_proc_show(struct seq_file *m, void *v) +{ + /* maximum; incore; ratio free to inuse; freelist */ + seq_printf(m, "%d\t%d\t%d\t%u\n", + 0, counter_val(xfsstats.xs_stats, XFSSTAT_END_XQMSTAT), + 0, counter_val(xfsstats.xs_stats, XFSSTAT_END_XQMSTAT + 1)); + return 0; +} + +static int xqm_proc_open(struct inode *inode, struct file *file) +{ + return single_open(file, xqm_proc_show, NULL); +} + +static const struct file_operations xqm_proc_fops = { + .owner = THIS_MODULE, + .open = xqm_proc_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + +/* legacy quota stats interface no 2 */ +static int xqmstat_proc_show(struct seq_file *m, void *v) +{ + int j; + + seq_printf(m, "qm"); + for (j = XFSSTAT_END_IBT_V2; j < XFSSTAT_END_XQMSTAT; j++) + seq_printf(m, " %u", counter_val(xfsstats.xs_stats, j)); + seq_putc(m, '\n'); + return 0; +} + +static int xqmstat_proc_open(struct inode *inode, struct file *file) +{ + return single_open(file, xqmstat_proc_show, NULL); +} + +static const struct file_operations xqmstat_proc_fops = { + .owner = THIS_MODULE, + .open = xqmstat_proc_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; +#endif /* CONFIG_XFS_QUOTA */ + +#ifdef CONFIG_PROC_FS +int +xfs_init_procfs(void) +{ + if (!proc_mkdir("fs/xfs", NULL)) + return -ENOMEM; + + if (!proc_symlink("fs/xfs/stat", NULL, + "/sys/fs/xfs/stats/stats")) + goto out; + +#ifdef CONFIG_XFS_QUOTA + if (!proc_create("fs/xfs/xqmstat", 0, NULL, + &xqmstat_proc_fops)) + goto out; + if (!proc_create("fs/xfs/xqm", 0, NULL, + &xqm_proc_fops)) + goto out; +#endif + return 0; + +out: + remove_proc_subtree("fs/xfs", NULL); + return -ENOMEM; +} + +void +xfs_cleanup_procfs(void) +{ + remove_proc_subtree("fs/xfs", NULL); +} +#endif /* CONFIG_PROC_FS */ |