linux/fs/ceph/debugfs.c
Xiubo Li 903f4fec78 ceph: add IO size metrics support
This will collect IO's total size and then calculate the average
size, and also will collect the min/max IO sizes.

The debugfs will show the size metrics in bytes and will let the
userspace applications to switch to what they need.

URL: https://tracker.ceph.com/issues/49913
Signed-off-by: Xiubo Li <xiubli@redhat.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2021-06-29 00:15:51 +02:00

460 lines
13 KiB
C

// SPDX-License-Identifier: GPL-2.0
#include <linux/ceph/ceph_debug.h>
#include <linux/device.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/ctype.h>
#include <linux/debugfs.h>
#include <linux/seq_file.h>
#include <linux/math64.h>
#include <linux/ktime.h>
#include <linux/ceph/libceph.h>
#include <linux/ceph/mon_client.h>
#include <linux/ceph/auth.h>
#include <linux/ceph/debugfs.h>
#include "super.h"
#ifdef CONFIG_DEBUG_FS
#include "mds_client.h"
#include "metric.h"
static int mdsmap_show(struct seq_file *s, void *p)
{
int i;
struct ceph_fs_client *fsc = s->private;
struct ceph_mdsmap *mdsmap;
if (!fsc->mdsc || !fsc->mdsc->mdsmap)
return 0;
mdsmap = fsc->mdsc->mdsmap;
seq_printf(s, "epoch %d\n", mdsmap->m_epoch);
seq_printf(s, "root %d\n", mdsmap->m_root);
seq_printf(s, "max_mds %d\n", mdsmap->m_max_mds);
seq_printf(s, "session_timeout %d\n", mdsmap->m_session_timeout);
seq_printf(s, "session_autoclose %d\n", mdsmap->m_session_autoclose);
for (i = 0; i < mdsmap->possible_max_rank; i++) {
struct ceph_entity_addr *addr = &mdsmap->m_info[i].addr;
int state = mdsmap->m_info[i].state;
seq_printf(s, "\tmds%d\t%s\t(%s)\n", i,
ceph_pr_addr(addr),
ceph_mds_state_name(state));
}
return 0;
}
/*
* mdsc debugfs
*/
static int mdsc_show(struct seq_file *s, void *p)
{
struct ceph_fs_client *fsc = s->private;
struct ceph_mds_client *mdsc = fsc->mdsc;
struct ceph_mds_request *req;
struct rb_node *rp;
int pathlen = 0;
u64 pathbase;
char *path;
mutex_lock(&mdsc->mutex);
for (rp = rb_first(&mdsc->request_tree); rp; rp = rb_next(rp)) {
req = rb_entry(rp, struct ceph_mds_request, r_node);
if (req->r_request && req->r_session)
seq_printf(s, "%lld\tmds%d\t", req->r_tid,
req->r_session->s_mds);
else if (!req->r_request)
seq_printf(s, "%lld\t(no request)\t", req->r_tid);
else
seq_printf(s, "%lld\t(no session)\t", req->r_tid);
seq_printf(s, "%s", ceph_mds_op_name(req->r_op));
if (test_bit(CEPH_MDS_R_GOT_UNSAFE, &req->r_req_flags))
seq_puts(s, "\t(unsafe)");
else
seq_puts(s, "\t");
if (req->r_inode) {
seq_printf(s, " #%llx", ceph_ino(req->r_inode));
} else if (req->r_dentry) {
path = ceph_mdsc_build_path(req->r_dentry, &pathlen,
&pathbase, 0);
if (IS_ERR(path))
path = NULL;
spin_lock(&req->r_dentry->d_lock);
seq_printf(s, " #%llx/%pd (%s)",
ceph_ino(d_inode(req->r_dentry->d_parent)),
req->r_dentry,
path ? path : "");
spin_unlock(&req->r_dentry->d_lock);
ceph_mdsc_free_path(path, pathlen);
} else if (req->r_path1) {
seq_printf(s, " #%llx/%s", req->r_ino1.ino,
req->r_path1);
} else {
seq_printf(s, " #%llx", req->r_ino1.ino);
}
if (req->r_old_dentry) {
path = ceph_mdsc_build_path(req->r_old_dentry, &pathlen,
&pathbase, 0);
if (IS_ERR(path))
path = NULL;
spin_lock(&req->r_old_dentry->d_lock);
seq_printf(s, " #%llx/%pd (%s)",
req->r_old_dentry_dir ?
ceph_ino(req->r_old_dentry_dir) : 0,
req->r_old_dentry,
path ? path : "");
spin_unlock(&req->r_old_dentry->d_lock);
ceph_mdsc_free_path(path, pathlen);
} else if (req->r_path2 && req->r_op != CEPH_MDS_OP_SYMLINK) {
if (req->r_ino2.ino)
seq_printf(s, " #%llx/%s", req->r_ino2.ino,
req->r_path2);
else
seq_printf(s, " %s", req->r_path2);
}
seq_puts(s, "\n");
}
mutex_unlock(&mdsc->mutex);
return 0;
}
#define CEPH_LAT_METRIC_SHOW(name, total, avg, min, max, sq) { \
s64 _total, _avg, _min, _max, _sq, _st; \
_avg = ktime_to_us(avg); \
_min = ktime_to_us(min == KTIME_MAX ? 0 : min); \
_max = ktime_to_us(max); \
_total = total - 1; \
_sq = _total > 0 ? DIV64_U64_ROUND_CLOSEST(sq, _total) : 0; \
_st = int_sqrt64(_sq); \
_st = ktime_to_us(_st); \
seq_printf(s, "%-14s%-12lld%-16lld%-16lld%-16lld%lld\n", \
name, total, _avg, _min, _max, _st); \
}
#define CEPH_SZ_METRIC_SHOW(name, total, avg, min, max, sum) { \
u64 _min = min == U64_MAX ? 0 : min; \
seq_printf(s, "%-14s%-12lld%-16llu%-16llu%-16llu%llu\n", \
name, total, avg, _min, max, sum); \
}
static int metric_show(struct seq_file *s, void *p)
{
struct ceph_fs_client *fsc = s->private;
struct ceph_mds_client *mdsc = fsc->mdsc;
struct ceph_client_metric *m = &mdsc->metric;
int nr_caps = 0;
s64 total, sum, avg, min, max, sq;
u64 sum_sz, avg_sz, min_sz, max_sz;
sum = percpu_counter_sum(&m->total_inodes);
seq_printf(s, "item total\n");
seq_printf(s, "------------------------------------------\n");
seq_printf(s, "%-35s%lld / %lld\n", "opened files / total inodes",
atomic64_read(&m->opened_files), sum);
seq_printf(s, "%-35s%lld / %lld\n", "pinned i_caps / total inodes",
atomic64_read(&m->total_caps), sum);
seq_printf(s, "%-35s%lld / %lld\n", "opened inodes / total inodes",
percpu_counter_sum(&m->opened_inodes), sum);
seq_printf(s, "\n");
seq_printf(s, "item total avg_lat(us) min_lat(us) max_lat(us) stdev(us)\n");
seq_printf(s, "-----------------------------------------------------------------------------------\n");
spin_lock(&m->read_metric_lock);
total = m->total_reads;
sum = m->read_latency_sum;
avg = total > 0 ? DIV64_U64_ROUND_CLOSEST(sum, total) : 0;
min = m->read_latency_min;
max = m->read_latency_max;
sq = m->read_latency_sq_sum;
spin_unlock(&m->read_metric_lock);
CEPH_LAT_METRIC_SHOW("read", total, avg, min, max, sq);
spin_lock(&m->write_metric_lock);
total = m->total_writes;
sum = m->write_latency_sum;
avg = total > 0 ? DIV64_U64_ROUND_CLOSEST(sum, total) : 0;
min = m->write_latency_min;
max = m->write_latency_max;
sq = m->write_latency_sq_sum;
spin_unlock(&m->write_metric_lock);
CEPH_LAT_METRIC_SHOW("write", total, avg, min, max, sq);
spin_lock(&m->metadata_metric_lock);
total = m->total_metadatas;
sum = m->metadata_latency_sum;
avg = total > 0 ? DIV64_U64_ROUND_CLOSEST(sum, total) : 0;
min = m->metadata_latency_min;
max = m->metadata_latency_max;
sq = m->metadata_latency_sq_sum;
spin_unlock(&m->metadata_metric_lock);
CEPH_LAT_METRIC_SHOW("metadata", total, avg, min, max, sq);
seq_printf(s, "\n");
seq_printf(s, "item total avg_sz(bytes) min_sz(bytes) max_sz(bytes) total_sz(bytes)\n");
seq_printf(s, "----------------------------------------------------------------------------------------\n");
spin_lock(&m->read_metric_lock);
total = m->total_reads;
sum_sz = m->read_size_sum;
avg_sz = total > 0 ? DIV64_U64_ROUND_CLOSEST(sum_sz, total) : 0;
min_sz = m->read_size_min;
max_sz = m->read_size_max;
spin_unlock(&m->read_metric_lock);
CEPH_SZ_METRIC_SHOW("read", total, avg_sz, min_sz, max_sz, sum_sz);
spin_lock(&m->write_metric_lock);
total = m->total_writes;
sum_sz = m->write_size_sum;
avg_sz = total > 0 ? DIV64_U64_ROUND_CLOSEST(sum_sz, total) : 0;
min_sz = m->write_size_min;
max_sz = m->write_size_max;
spin_unlock(&m->write_metric_lock);
CEPH_SZ_METRIC_SHOW("write", total, avg_sz, min_sz, max_sz, sum_sz);
seq_printf(s, "\n");
seq_printf(s, "item total miss hit\n");
seq_printf(s, "-------------------------------------------------\n");
seq_printf(s, "%-14s%-16lld%-16lld%lld\n", "d_lease",
atomic64_read(&m->total_dentries),
percpu_counter_sum(&m->d_lease_mis),
percpu_counter_sum(&m->d_lease_hit));
nr_caps = atomic64_read(&m->total_caps);
seq_printf(s, "%-14s%-16d%-16lld%lld\n", "caps", nr_caps,
percpu_counter_sum(&m->i_caps_mis),
percpu_counter_sum(&m->i_caps_hit));
return 0;
}
static int caps_show_cb(struct inode *inode, struct ceph_cap *cap, void *p)
{
struct seq_file *s = p;
seq_printf(s, "0x%-17llx%-3d%-17s%-17s\n", ceph_ino(inode),
cap->session->s_mds,
ceph_cap_string(cap->issued),
ceph_cap_string(cap->implemented));
return 0;
}
static int caps_show(struct seq_file *s, void *p)
{
struct ceph_fs_client *fsc = s->private;
struct ceph_mds_client *mdsc = fsc->mdsc;
int total, avail, used, reserved, min, i;
struct cap_wait *cw;
ceph_reservation_status(fsc, &total, &avail, &used, &reserved, &min);
seq_printf(s, "total\t\t%d\n"
"avail\t\t%d\n"
"used\t\t%d\n"
"reserved\t%d\n"
"min\t\t%d\n\n",
total, avail, used, reserved, min);
seq_printf(s, "ino mds issued implemented\n");
seq_printf(s, "--------------------------------------------------\n");
mutex_lock(&mdsc->mutex);
for (i = 0; i < mdsc->max_sessions; i++) {
struct ceph_mds_session *session;
session = __ceph_lookup_mds_session(mdsc, i);
if (!session)
continue;
mutex_unlock(&mdsc->mutex);
mutex_lock(&session->s_mutex);
ceph_iterate_session_caps(session, caps_show_cb, s);
mutex_unlock(&session->s_mutex);
ceph_put_mds_session(session);
mutex_lock(&mdsc->mutex);
}
mutex_unlock(&mdsc->mutex);
seq_printf(s, "\n\nWaiters:\n--------\n");
seq_printf(s, "tgid ino need want\n");
seq_printf(s, "-----------------------------------------------------\n");
spin_lock(&mdsc->caps_list_lock);
list_for_each_entry(cw, &mdsc->cap_wait_list, list) {
seq_printf(s, "%-13d0x%-17llx%-17s%-17s\n", cw->tgid, cw->ino,
ceph_cap_string(cw->need),
ceph_cap_string(cw->want));
}
spin_unlock(&mdsc->caps_list_lock);
return 0;
}
static int mds_sessions_show(struct seq_file *s, void *ptr)
{
struct ceph_fs_client *fsc = s->private;
struct ceph_mds_client *mdsc = fsc->mdsc;
struct ceph_auth_client *ac = fsc->client->monc.auth;
struct ceph_options *opt = fsc->client->options;
int mds;
mutex_lock(&mdsc->mutex);
/* The 'num' portion of an 'entity name' */
seq_printf(s, "global_id %llu\n", ac->global_id);
/* The -o name mount argument */
seq_printf(s, "name \"%s\"\n", opt->name ? opt->name : "");
/* The list of MDS session rank+state */
for (mds = 0; mds < mdsc->max_sessions; mds++) {
struct ceph_mds_session *session =
__ceph_lookup_mds_session(mdsc, mds);
if (!session) {
continue;
}
mutex_unlock(&mdsc->mutex);
seq_printf(s, "mds.%d %s\n",
session->s_mds,
ceph_session_state_name(session->s_state));
ceph_put_mds_session(session);
mutex_lock(&mdsc->mutex);
}
mutex_unlock(&mdsc->mutex);
return 0;
}
static int status_show(struct seq_file *s, void *p)
{
struct ceph_fs_client *fsc = s->private;
struct ceph_entity_inst *inst = &fsc->client->msgr.inst;
struct ceph_entity_addr *client_addr = ceph_client_addr(fsc->client);
seq_printf(s, "instance: %s.%lld %s/%u\n", ENTITY_NAME(inst->name),
ceph_pr_addr(client_addr), le32_to_cpu(client_addr->nonce));
seq_printf(s, "blocklisted: %s\n", fsc->blocklisted ? "true" : "false");
return 0;
}
DEFINE_SHOW_ATTRIBUTE(mdsmap);
DEFINE_SHOW_ATTRIBUTE(mdsc);
DEFINE_SHOW_ATTRIBUTE(caps);
DEFINE_SHOW_ATTRIBUTE(mds_sessions);
DEFINE_SHOW_ATTRIBUTE(metric);
DEFINE_SHOW_ATTRIBUTE(status);
/*
* debugfs
*/
static int congestion_kb_set(void *data, u64 val)
{
struct ceph_fs_client *fsc = (struct ceph_fs_client *)data;
fsc->mount_options->congestion_kb = (int)val;
return 0;
}
static int congestion_kb_get(void *data, u64 *val)
{
struct ceph_fs_client *fsc = (struct ceph_fs_client *)data;
*val = (u64)fsc->mount_options->congestion_kb;
return 0;
}
DEFINE_SIMPLE_ATTRIBUTE(congestion_kb_fops, congestion_kb_get,
congestion_kb_set, "%llu\n");
void ceph_fs_debugfs_cleanup(struct ceph_fs_client *fsc)
{
dout("ceph_fs_debugfs_cleanup\n");
debugfs_remove(fsc->debugfs_bdi);
debugfs_remove(fsc->debugfs_congestion_kb);
debugfs_remove(fsc->debugfs_mdsmap);
debugfs_remove(fsc->debugfs_mds_sessions);
debugfs_remove(fsc->debugfs_caps);
debugfs_remove(fsc->debugfs_metric);
debugfs_remove(fsc->debugfs_mdsc);
}
void ceph_fs_debugfs_init(struct ceph_fs_client *fsc)
{
char name[100];
dout("ceph_fs_debugfs_init\n");
fsc->debugfs_congestion_kb =
debugfs_create_file("writeback_congestion_kb",
0600,
fsc->client->debugfs_dir,
fsc,
&congestion_kb_fops);
snprintf(name, sizeof(name), "../../bdi/%s",
bdi_dev_name(fsc->sb->s_bdi));
fsc->debugfs_bdi =
debugfs_create_symlink("bdi",
fsc->client->debugfs_dir,
name);
fsc->debugfs_mdsmap = debugfs_create_file("mdsmap",
0400,
fsc->client->debugfs_dir,
fsc,
&mdsmap_fops);
fsc->debugfs_mds_sessions = debugfs_create_file("mds_sessions",
0400,
fsc->client->debugfs_dir,
fsc,
&mds_sessions_fops);
fsc->debugfs_mdsc = debugfs_create_file("mdsc",
0400,
fsc->client->debugfs_dir,
fsc,
&mdsc_fops);
fsc->debugfs_metric = debugfs_create_file("metrics",
0400,
fsc->client->debugfs_dir,
fsc,
&metric_fops);
fsc->debugfs_caps = debugfs_create_file("caps",
0400,
fsc->client->debugfs_dir,
fsc,
&caps_fops);
fsc->debugfs_status = debugfs_create_file("status",
0400,
fsc->client->debugfs_dir,
fsc,
&status_fops);
}
#else /* CONFIG_DEBUG_FS */
void ceph_fs_debugfs_init(struct ceph_fs_client *fsc)
{
}
void ceph_fs_debugfs_cleanup(struct ceph_fs_client *fsc)
{
}
#endif /* CONFIG_DEBUG_FS */