// 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_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);			\} 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; 	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_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_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_METRIC_SHOW("metadata", total, avg, min, max, sq); 	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 */