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Commit 76aa844d authored by Sage Weil's avatar Sage Weil
Browse files

ceph: debugfs 



Basic state information is available via /sys/kernel/debug/ceph,
including instances of the client, fsids, current monitor, mds and osd
maps, outstanding server requests, and hooks to adjust debug levels.

Signed-off-by: default avatarSage Weil <sage@newdream.net>
parent 8f4e91de

fs/ceph/debugfs.c

0 → 100644
+425 −0
Original line number Diff line number Diff line 
#include "ceph_debug.h"



#include <linux/module.h>

#include <linux/ctype.h>

#include <linux/debugfs.h>

#include <linux/seq_file.h>



#include "super.h"

#include "mds_client.h"



/*

 * Implement /sys/kernel/debug/ceph fun

 *

 * /sys/kernel/debug/ceph/client*  - an instance of the ceph client

 *      .../osdmap      - current osdmap

 *      .../mdsmap      - current mdsmap

 *      .../monmap      - current monmap

 *      .../osdc        - active osd requests

 *      .../mdsc        - active mds requests

 *      .../monc        - mon client state

 *      .../dentry_lru  - dump contents of dentry lru

 *      .../caps        - expose cap (reservation) stats

 */



static struct dentry *ceph_debugfs_dir;



static int monmap_show(struct seq_file *s, void *p)

{

	int i;

	struct ceph_client *client = s->private;



	if (client->monc.monmap == NULL)

		return 0;



	seq_printf(s, "epoch %d\n", client->monc.monmap->epoch);

	for (i = 0; i < client->monc.monmap->num_mon; i++) {

		struct ceph_entity_inst *inst =

			&client->monc.monmap->mon_inst[i];



		seq_printf(s, "\t%s%lld\t%s\n",

			   ENTITY_NAME(inst->name),

			   pr_addr(&inst->addr.in_addr));

	}

	return 0;

}



static int mdsmap_show(struct seq_file *s, void *p)

{

	int i;

	struct ceph_client *client = s->private;



	if (client->mdsc.mdsmap == NULL)

		return 0;

	seq_printf(s, "epoch %d\n", client->mdsc.mdsmap->m_epoch);

	seq_printf(s, "root %d\n", client->mdsc.mdsmap->m_root);

	seq_printf(s, "session_timeout %d\n",

		       client->mdsc.mdsmap->m_session_timeout);

	seq_printf(s, "session_autoclose %d\n",

		       client->mdsc.mdsmap->m_session_autoclose);

	for (i = 0; i < client->mdsc.mdsmap->m_max_mds; i++) {

		struct ceph_entity_addr *addr =

			&client->mdsc.mdsmap->m_info[i].addr;

		int state = client->mdsc.mdsmap->m_info[i].state;



		seq_printf(s, "\tmds%d\t%s\t(%s)\n", i, pr_addr(&addr->in_addr),

			       ceph_mds_state_name(state));

	}

	return 0;

}



static int osdmap_show(struct seq_file *s, void *p)

{

	int i;

	struct ceph_client *client = s->private;



	if (client->osdc.osdmap == NULL)

		return 0;

	seq_printf(s, "epoch %d\n", client->osdc.osdmap->epoch);

	seq_printf(s, "flags%s%s\n",

		   (client->osdc.osdmap->flags & CEPH_OSDMAP_NEARFULL) ?

		   " NEARFULL" : "",

		   (client->osdc.osdmap->flags & CEPH_OSDMAP_FULL) ?

		   " FULL" : "");

	for (i = 0; i < client->osdc.osdmap->num_pools; i++) {

		struct ceph_pg_pool_info *pool =

			&client->osdc.osdmap->pg_pool[i];

		seq_printf(s, "pg_pool %d pg_num %d / %d, lpg_num %d / %d\n",

			   i, pool->v.pg_num, pool->pg_num_mask,

			   pool->v.lpg_num, pool->lpg_num_mask);

	}

	for (i = 0; i < client->osdc.osdmap->max_osd; i++) {

		struct ceph_entity_addr *addr =

			&client->osdc.osdmap->osd_addr[i];

		int state = client->osdc.osdmap->osd_state[i];

		char sb[64];



		seq_printf(s, "\tosd%d\t%s\t%3d%%\t(%s)\n",

			   i, pr_addr(&addr->in_addr),

			   ((client->osdc.osdmap->osd_weight[i]*100) >> 16),

			   ceph_osdmap_state_str(sb, sizeof(sb), state));

	}

	return 0;

}



static int monc_show(struct seq_file *s, void *p)

{

	struct ceph_client *client = s->private;

	struct ceph_mon_statfs_request *req;

	u64 nexttid = 0;

	int got;

	struct ceph_mon_client *monc = &client->monc;



	mutex_lock(&monc->mutex);



	if (monc->have_mdsmap)

		seq_printf(s, "have mdsmap %u\n", (unsigned)monc->have_mdsmap);

	if (monc->have_osdmap)

		seq_printf(s, "have osdmap %u\n", (unsigned)monc->have_osdmap);

	if (monc->want_next_osdmap)

		seq_printf(s, "want next osdmap\n");



	while (nexttid < monc->last_tid) {

		got = radix_tree_gang_lookup(&monc->statfs_request_tree,

					     (void **)&req, nexttid, 1);

		if (got == 0)

			break;

		nexttid = req->tid + 1;



		seq_printf(s, "%lld statfs\n", req->tid);

	}

	mutex_unlock(&monc->mutex);



	return 0;

}



static int mdsc_show(struct seq_file *s, void *p)

{

	struct ceph_client *client = s->private;

	struct ceph_mds_request *req;

	u64 nexttid = 0;

	int got;

	struct ceph_mds_client *mdsc = &client->mdsc;

	int pathlen;

	u64 pathbase;

	char *path;



	mutex_lock(&mdsc->mutex);

	while (nexttid < mdsc->last_tid) {

		got = radix_tree_gang_lookup(&mdsc->request_tree,

					     (void **)&req, nexttid, 1);

		if (got == 0)

			break;

		nexttid = req->r_tid + 1;



		if (req->r_request)

			seq_printf(s, "%lld\tmds%d\t", req->r_tid, req->r_mds);

		else

			seq_printf(s, "%lld\t(no request)\t", req->r_tid);



		seq_printf(s, "%s", ceph_mds_op_name(req->r_op));



		if (req->r_got_unsafe)

			seq_printf(s, "\t(unsafe)");

		else

			seq_printf(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);

			spin_lock(&req->r_dentry->d_lock);

			seq_printf(s, " #%llx/%.*s (%s)",

				   ceph_ino(req->r_dentry->d_parent->d_inode),

				   req->r_dentry->d_name.len,

				   req->r_dentry->d_name.name,

				   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);

		}



		if (req->r_old_dentry) {

			path = ceph_mdsc_build_path(req->r_old_dentry, &pathlen,

						    &pathbase, 0);

			spin_lock(&req->r_old_dentry->d_lock);

			seq_printf(s, " #%llx/%.*s (%s)",

			   ceph_ino(req->r_old_dentry->d_parent->d_inode),

				   req->r_old_dentry->d_name.len,

				   req->r_old_dentry->d_name.name,

				   path ? path : "");

			spin_unlock(&req->r_old_dentry->d_lock);

			kfree(path);

		} else if (req->r_path2) {

			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_printf(s, "\n");

	}

	mutex_unlock(&mdsc->mutex);



	return 0;

}



static int osdc_show(struct seq_file *s, void *pp)

{

	struct ceph_client *client = s->private;

	struct ceph_osd_client *osdc = &client->osdc;

	struct rb_node *p;



	mutex_lock(&osdc->request_mutex);

	for (p = rb_first(&osdc->requests); p; p = rb_next(p)) {

		struct ceph_osd_request *req;

		struct ceph_osd_request_head *head;

		struct ceph_osd_op *op;

		int num_ops;

		int opcode, olen;

		int i;



		req = rb_entry(p, struct ceph_osd_request, r_node);



		seq_printf(s, "%lld\tosd%d\t", req->r_tid,

			   req->r_osd ? req->r_osd->o_osd : -1);



		head = req->r_request->front.iov_base;

		op = (void *)(head + 1);



		num_ops = le16_to_cpu(head->num_ops);

		olen = le32_to_cpu(head->object_len);

		seq_printf(s, "%.*s", olen,

			   (const char *)(head->ops + num_ops));



		if (req->r_reassert_version.epoch)

			seq_printf(s, "\t%u'%llu",

			   (unsigned)le32_to_cpu(req->r_reassert_version.epoch),

			   le64_to_cpu(req->r_reassert_version.version));

		else

			seq_printf(s, "\t");



		for (i = 0; i < num_ops; i++) {

			opcode = le16_to_cpu(op->op);

			seq_printf(s, "\t%s", ceph_osd_op_name(opcode));

			op++;

		}



		seq_printf(s, "\n");

	}

	mutex_unlock(&osdc->request_mutex);

	return 0;

}



static int caps_show(struct seq_file *s, void *p)

{

	struct ceph_client *client = p;

	int total, avail, used, reserved;



	ceph_reservation_status(client, &total, &avail, &used, &reserved);

	seq_printf(s, "total\t\t%d\n"

		      "avail\t\t%d\n"

		      "used\t\t%d\n"

		      "reserved\t%d\n",

		   total, avail, used, reserved);

	return 0;

}



static int dentry_lru_show(struct seq_file *s, void *ptr)

{

	struct ceph_client *client = s->private;

	struct ceph_mds_client *mdsc = &client->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%.*s\n",

			   di, dentry, dentry->d_name.len, dentry->d_name.name);

	}

	spin_unlock(&mdsc->dentry_lru_lock);



	return 0;

}



#define DEFINE_SHOW_FUNC(name) 						\

static int name##_open(struct inode *inode, struct file *file)		\

{									\

	struct seq_file *sf;						\

	int ret;							\

									\

	ret = single_open(file, name, NULL);				\

	sf = file->private_data;					\

	sf->private = inode->i_private;					\

	return ret;							\

}									\

									\

static const struct file_operations name##_fops = {			\

	.open		= name##_open,					\

	.read		= seq_read,					\

	.llseek		= seq_lseek,					\

	.release	= single_release,				\

};



DEFINE_SHOW_FUNC(monmap_show)

DEFINE_SHOW_FUNC(mdsmap_show)

DEFINE_SHOW_FUNC(osdmap_show)

DEFINE_SHOW_FUNC(monc_show)

DEFINE_SHOW_FUNC(mdsc_show)

DEFINE_SHOW_FUNC(osdc_show)

DEFINE_SHOW_FUNC(dentry_lru_show)

DEFINE_SHOW_FUNC(caps_show)



int __init ceph_debugfs_init(void)

{

	ceph_debugfs_dir = debugfs_create_dir("ceph", NULL);

	if (!ceph_debugfs_dir)

		return -ENOMEM;

	return 0;

}



void ceph_debugfs_cleanup(void)

{

	debugfs_remove(ceph_debugfs_dir);

}



int ceph_debugfs_client_init(struct ceph_client *client)

{

	int ret = 0;

	char name[80];



	snprintf(name, sizeof(name), FSID_FORMAT ".client%lld",

		 PR_FSID(&client->monc.monmap->fsid), client->whoami);



	client->debugfs_dir = debugfs_create_dir(name, ceph_debugfs_dir);

	if (!client->debugfs_dir)

		goto out;



	client->monc.debugfs_file = debugfs_create_file("monc",

						      0600,

						      client->debugfs_dir,

						      client,

						      &monc_show_fops);

	if (!client->monc.debugfs_file)

		goto out;



	client->mdsc.debugfs_file = debugfs_create_file("mdsc",

						      0600,

						      client->debugfs_dir,

						      client,

						      &mdsc_show_fops);

	if (!client->mdsc.debugfs_file)

		goto out;



	client->osdc.debugfs_file = debugfs_create_file("osdc",

						      0600,

						      client->debugfs_dir,

						      client,

						      &osdc_show_fops);

	if (!client->osdc.debugfs_file)

		goto out;



	client->debugfs_monmap = debugfs_create_file("monmap",

					0600,

					client->debugfs_dir,

					client,

					&monmap_show_fops);

	if (!client->debugfs_monmap)

		goto out;



	client->debugfs_mdsmap = debugfs_create_file("mdsmap",

					0600,

					client->debugfs_dir,

					client,

					&mdsmap_show_fops);

	if (!client->debugfs_mdsmap)

		goto out;



	client->debugfs_osdmap = debugfs_create_file("osdmap",

					0600,

					client->debugfs_dir,

					client,

					&osdmap_show_fops);

	if (!client->debugfs_osdmap)

		goto out;



	client->debugfs_dentry_lru = debugfs_create_file("dentry_lru",

					0600,

					client->debugfs_dir,

					client,

					&dentry_lru_show_fops);

	if (!client->debugfs_dentry_lru)

		goto out;



	client->debugfs_caps = debugfs_create_file("caps",

						   0400,

						   client->debugfs_dir,

						   client,

						   &caps_show_fops);

	if (!client->debugfs_caps)

		goto out;



	return 0;



out:

	ceph_debugfs_client_cleanup(client);

	return ret;

}



void ceph_debugfs_client_cleanup(struct ceph_client *client)

{

	debugfs_remove(client->debugfs_caps);

	debugfs_remove(client->debugfs_dentry_lru);

	debugfs_remove(client->debugfs_osdmap);

	debugfs_remove(client->debugfs_mdsmap);

	debugfs_remove(client->debugfs_monmap);

	debugfs_remove(client->osdc.debugfs_file);

	debugfs_remove(client->mdsc.debugfs_file);

	debugfs_remove(client->monc.debugfs_file);

	debugfs_remove(client->debugfs_dir);

}