#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> #ifdef CONFIG_DEBUG_FS /* * Implement /sys/kernel/debug/ceph fun * * /sys/kernel/debug/ceph/client*  - an instance of the ceph client *      .../osdmap      - current osdmap *      .../monmap      - current monmap *      .../osdc        - active osd requests *      .../monc        - mon client state *      .../dentry_lru  - dump contents of dentry lru *      .../caps        - expose cap (reservation) stats *      .../bdi         - symlink to ../../bdi/something */ 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),			   ceph_pr_addr(&inst->addr.in_addr));	}	return 0;} static int osdmap_show(struct seq_file *s, void *p){	int i;	struct ceph_client *client = s->private;	struct rb_node *n; 	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 (n = rb_first(&client->osdc.osdmap->pg_pools); n; n = rb_next(n)) {		struct ceph_pg_pool_info *pool =			rb_entry(n, struct ceph_pg_pool_info, node);		seq_printf(s, "pg_pool %llu pg_num %d / %d\n",			   (unsigned long long)pool->id, pool->pg_num,			   pool->pg_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, ceph_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_generic_request *req;	struct ceph_mon_client *monc = &client->monc;	struct rb_node *rp; 	mutex_lock(&monc->mutex); 	if (monc->have_mdsmap)		seq_printf(s, "have mdsmap %u\n", (unsigned int)monc->have_mdsmap);	if (monc->have_osdmap)		seq_printf(s, "have osdmap %u\n", (unsigned int)monc->have_osdmap);	if (monc->want_next_osdmap)		seq_printf(s, "want next osdmap\n"); 	for (rp = rb_first(&monc->generic_request_tree); rp; rp = rb_next(rp)) {		__u16 op;		req = rb_entry(rp, struct ceph_mon_generic_request, node);		op = le16_to_cpu(req->request->hdr.type);		if (op == CEPH_MSG_STATFS)			seq_printf(s, "%lld statfs\n", req->tid);		else			seq_printf(s, "%lld unknown\n", req->tid);	} 	mutex_unlock(&monc->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;		int opcode;		int i; 		req = rb_entry(p, struct ceph_osd_request, r_node); 		seq_printf(s, "%lld\tosd%d\t%lld.%x\t", req->r_tid,			   req->r_osd ? req->r_osd->o_osd : -1,			   req->r_pgid.pool, req->r_pgid.seed); 		seq_printf(s, "%.*s", req->r_oid_len, req->r_oid); 		if (req->r_reassert_version.epoch)			seq_printf(s, "\t%u'%llu",			   (unsigned int)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 < req->r_num_ops; i++) {			opcode = le16_to_cpu(req->r_request_ops[i].op);			seq_printf(s, "\t%s", ceph_osd_op_name(opcode));		} 		seq_printf(s, "\n");	}	mutex_unlock(&osdc->request_mutex);	return 0;} CEPH_DEFINE_SHOW_FUNC(monmap_show)CEPH_DEFINE_SHOW_FUNC(osdmap_show)CEPH_DEFINE_SHOW_FUNC(monc_show)CEPH_DEFINE_SHOW_FUNC(osdc_show) int 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 = -ENOMEM;	char name[80]; 	snprintf(name, sizeof(name), "%pU.client%lld", &client->fsid,		 client->monc.auth->global_id); 	dout("ceph_debugfs_client_init %p %s\n", client, name); 	BUG_ON(client->debugfs_dir);	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->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_osdmap = debugfs_create_file("osdmap",					0600,					client->debugfs_dir,					client,					&osdmap_show_fops);	if (!client->debugfs_osdmap)		goto out; 	return 0; out:	ceph_debugfs_client_cleanup(client);	return ret;} void ceph_debugfs_client_cleanup(struct ceph_client *client){	dout("ceph_debugfs_client_cleanup %p\n", client);	debugfs_remove(client->debugfs_osdmap);	debugfs_remove(client->debugfs_monmap);	debugfs_remove(client->osdc.debugfs_file);	debugfs_remove(client->monc.debugfs_file);	debugfs_remove(client->debugfs_dir);} #else  /* CONFIG_DEBUG_FS */ int ceph_debugfs_init(void){	return 0;} void ceph_debugfs_cleanup(void){} int ceph_debugfs_client_init(struct ceph_client *client){	return 0;} void ceph_debugfs_client_cleanup(struct ceph_client *client){} #endif  /* CONFIG_DEBUG_FS */ EXPORT_SYMBOL(ceph_debugfs_init);EXPORT_SYMBOL(ceph_debugfs_cleanup);