fs/ceph/debugfs.c - linux - Git at Google

 // 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/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"

 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->m_num_mds; 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->in_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;
 	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);
 			kfree(path);
 		} 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);
 			kfree(path);
 		} 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;
 }

 static int caps_show(struct seq_file *s, void *p)
 {
 	struct ceph_fs_client *fsc = s->private;
 	int total, avail, used, reserved, min;

 	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%d\n",
 		   total, avail, used, reserved, min);
 	return 0;
 }

 static int dentry_lru_show(struct seq_file *s, void *ptr)
 {
 	struct ceph_fs_client *fsc = s->private;
 	struct ceph_mds_client *mdsc = fsc->mdsc;
 	struct ceph_dentry_info *di;

 	spin_lock(&mdsc->dentry_lru_lock);
 	list_for_each_entry(di, &mdsc->dentry_lru, lru) {
 		struct dentry *dentry = di->dentry;
 		seq_printf(s, "%p %p\t%pd\n",
 			   di, dentry, dentry);
 	}
 	spin_unlock(&mdsc->dentry_lru_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 = -1;

 	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;
 }

 CEPH_DEFINE_SHOW_FUNC(mdsmap_show)
 CEPH_DEFINE_SHOW_FUNC(mdsc_show)
 CEPH_DEFINE_SHOW_FUNC(caps_show)
 CEPH_DEFINE_SHOW_FUNC(dentry_lru_show)
 CEPH_DEFINE_SHOW_FUNC(mds_sessions_show)


 /*
  * 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_mdsc);
 	debugfs_remove(fsc->debugfs_dentry_lru);
 }

 int ceph_fs_debugfs_init(struct ceph_fs_client *fsc)
 {
 	char name[100];
 	int err = -ENOMEM;

 	dout("ceph_fs_debugfs_init\n");
 	BUG_ON(!fsc->client->debugfs_dir);
 	fsc->debugfs_congestion_kb =
 		debugfs_create_file("writeback_congestion_kb",
 				    0600,
 				    fsc->client->debugfs_dir,
 				    fsc,
 				    &congestion_kb_fops);
 	if (!fsc->debugfs_congestion_kb)
 		goto out;

 	snprintf(name, sizeof(name), "../../bdi/%s",
 		 dev_name(fsc->sb->s_bdi->dev));
 	fsc->debugfs_bdi =
 		debugfs_create_symlink("bdi",
 				       fsc->client->debugfs_dir,
 				       name);
 	if (!fsc->debugfs_bdi)
 		goto out;

 	fsc->debugfs_mdsmap = debugfs_create_file("mdsmap",
 					0400,
 					fsc->client->debugfs_dir,
 					fsc,
 					&mdsmap_show_fops);
 	if (!fsc->debugfs_mdsmap)
 		goto out;

 	fsc->debugfs_mds_sessions = debugfs_create_file("mds_sessions",
 					0400,
 					fsc->client->debugfs_dir,
 					fsc,
 					&mds_sessions_show_fops);
 	if (!fsc->debugfs_mds_sessions)
 		goto out;

 	fsc->debugfs_mdsc = debugfs_create_file("mdsc",
 						0400,
 						fsc->client->debugfs_dir,
 						fsc,
 						&mdsc_show_fops);
 	if (!fsc->debugfs_mdsc)
 		goto out;

 	fsc->debugfs_caps = debugfs_create_file("caps",
 						   0400,
 						   fsc->client->debugfs_dir,
 						   fsc,
 						   &caps_show_fops);
 	if (!fsc->debugfs_caps)
 		goto out;

 	fsc->debugfs_dentry_lru = debugfs_create_file("dentry_lru",
 					0400,
 					fsc->client->debugfs_dir,
 					fsc,
 					&dentry_lru_show_fops);
 	if (!fsc->debugfs_dentry_lru)
 		goto out;

 	return 0;

 out:
 	ceph_fs_debugfs_cleanup(fsc);
 	return err;
 }


 #else  /* CONFIG_DEBUG_FS */

 int ceph_fs_debugfs_init(struct ceph_fs_client *fsc)
 {
 	return 0;
 }

 void ceph_fs_debugfs_cleanup(struct ceph_fs_client *fsc)
 {
 }

 #endif  /* CONFIG_DEBUG_FS */
	// 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/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"

	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->m_num_mds; 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->in_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;
	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);
	kfree(path);
	} 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);
	kfree(path);
	} 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;
	}

	static int caps_show(struct seq_file s, void p)
	{
	struct ceph_fs_client *fsc = s->private;
	int total, avail, used, reserved, min;

	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%d\n",
	total, avail, used, reserved, min);
	return 0;
	}

	static int dentry_lru_show(struct seq_file s, void ptr)
	{
	struct ceph_fs_client *fsc = s->private;
	struct ceph_mds_client *mdsc = fsc->mdsc;
	struct ceph_dentry_info *di;

	spin_lock(&mdsc->dentry_lru_lock);
	list_for_each_entry(di, &mdsc->dentry_lru, lru) {
	struct dentry *dentry = di->dentry;
	seq_printf(s, "%p %p\t%pd\n",
	di, dentry, dentry);
	}
	spin_unlock(&mdsc->dentry_lru_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 = -1;

	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;
	}

	CEPH_DEFINE_SHOW_FUNC(mdsmap_show)
	CEPH_DEFINE_SHOW_FUNC(mdsc_show)
	CEPH_DEFINE_SHOW_FUNC(caps_show)
	CEPH_DEFINE_SHOW_FUNC(dentry_lru_show)
	CEPH_DEFINE_SHOW_FUNC(mds_sessions_show)


	/*
	* 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_mdsc);
	debugfs_remove(fsc->debugfs_dentry_lru);
	}

	int ceph_fs_debugfs_init(struct ceph_fs_client *fsc)
	{
	char name[100];
	int err = -ENOMEM;

	dout("ceph_fs_debugfs_init\n");
	BUG_ON(!fsc->client->debugfs_dir);
	fsc->debugfs_congestion_kb =
	debugfs_create_file("writeback_congestion_kb",
	0600,
	fsc->client->debugfs_dir,
	fsc,
	&congestion_kb_fops);
	if (!fsc->debugfs_congestion_kb)
	goto out;

	snprintf(name, sizeof(name), "../../bdi/%s",
	dev_name(fsc->sb->s_bdi->dev));
	fsc->debugfs_bdi =
	debugfs_create_symlink("bdi",
	fsc->client->debugfs_dir,
	name);
	if (!fsc->debugfs_bdi)
	goto out;

	fsc->debugfs_mdsmap = debugfs_create_file("mdsmap",
	0400,
	fsc->client->debugfs_dir,
	fsc,
	&mdsmap_show_fops);
	if (!fsc->debugfs_mdsmap)
	goto out;

	fsc->debugfs_mds_sessions = debugfs_create_file("mds_sessions",
	0400,
	fsc->client->debugfs_dir,
	fsc,
	&mds_sessions_show_fops);
	if (!fsc->debugfs_mds_sessions)
	goto out;

	fsc->debugfs_mdsc = debugfs_create_file("mdsc",
	0400,
	fsc->client->debugfs_dir,
	fsc,
	&mdsc_show_fops);
	if (!fsc->debugfs_mdsc)
	goto out;

	fsc->debugfs_caps = debugfs_create_file("caps",
	0400,
	fsc->client->debugfs_dir,
	fsc,
	&caps_show_fops);
	if (!fsc->debugfs_caps)
	goto out;

	fsc->debugfs_dentry_lru = debugfs_create_file("dentry_lru",
	0400,
	fsc->client->debugfs_dir,
	fsc,
	&dentry_lru_show_fops);
	if (!fsc->debugfs_dentry_lru)
	goto out;

	return 0;

	out:
	ceph_fs_debugfs_cleanup(fsc);
	return err;
	}


	#else /* CONFIG_DEBUG_FS */

	int ceph_fs_debugfs_init(struct ceph_fs_client *fsc)
	{
	return 0;
	}

	void ceph_fs_debugfs_cleanup(struct ceph_fs_client *fsc)
	{
	}

	#endif /* CONFIG_DEBUG_FS */