// 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> #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 *      .../client_options - libceph-only (i.e. not rbd or cephfs) options *      .../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));	}	return 0;} static int osdmap_show(struct seq_file *s, void *p){	int i;	struct ceph_client *client = s->private;	struct ceph_osd_client *osdc = &client->osdc;	struct ceph_osdmap *map = osdc->osdmap;	struct rb_node *n; 	if (map == NULL)		return 0; 	down_read(&osdc->lock);	seq_printf(s, "epoch %u barrier %u flags 0x%x\n", map->epoch,			osdc->epoch_barrier, map->flags); 	for (n = rb_first(&map->pg_pools); n; n = rb_next(n)) {		struct ceph_pg_pool_info *pi =			rb_entry(n, struct ceph_pg_pool_info, node); 		seq_printf(s, "pool %lld '%s' type %d size %d min_size %d pg_num %u pg_num_mask %d flags 0x%llx lfor %u read_tier %lld write_tier %lld\n",			   pi->id, pi->name, pi->type, pi->size, pi->min_size,			   pi->pg_num, pi->pg_num_mask, pi->flags,			   pi->last_force_request_resend, pi->read_tier,			   pi->write_tier);	}	for (i = 0; i < map->max_osd; i++) {		struct ceph_entity_addr *addr = &map->osd_addr[i];		u32 state = map->osd_state[i];		char sb[64]; 		seq_printf(s, "osd%d\t%s\t%3d%%\t(%s)\t%3d%%\n",			   i, ceph_pr_addr(addr),			   ((map->osd_weight[i]*100) >> 16),			   ceph_osdmap_state_str(sb, sizeof(sb), state),			   ((ceph_get_primary_affinity(map, i)*100) >> 16));	}	for (n = rb_first(&map->pg_temp); n; n = rb_next(n)) {		struct ceph_pg_mapping *pg =			rb_entry(n, struct ceph_pg_mapping, node); 		seq_printf(s, "pg_temp %llu.%x [", pg->pgid.pool,			   pg->pgid.seed);		for (i = 0; i < pg->pg_temp.len; i++)			seq_printf(s, "%s%d", (i == 0 ? "" : ","),				   pg->pg_temp.osds[i]);		seq_printf(s, "]\n");	}	for (n = rb_first(&map->primary_temp); n; n = rb_next(n)) {		struct ceph_pg_mapping *pg =			rb_entry(n, struct ceph_pg_mapping, node); 		seq_printf(s, "primary_temp %llu.%x %d\n", pg->pgid.pool,			   pg->pgid.seed, pg->primary_temp.osd);	}	for (n = rb_first(&map->pg_upmap); n; n = rb_next(n)) {		struct ceph_pg_mapping *pg =			rb_entry(n, struct ceph_pg_mapping, node); 		seq_printf(s, "pg_upmap %llu.%x [", pg->pgid.pool,			   pg->pgid.seed);		for (i = 0; i < pg->pg_upmap.len; i++)			seq_printf(s, "%s%d", (i == 0 ? "" : ","),				   pg->pg_upmap.osds[i]);		seq_printf(s, "]\n");	}	for (n = rb_first(&map->pg_upmap_items); n; n = rb_next(n)) {		struct ceph_pg_mapping *pg =			rb_entry(n, struct ceph_pg_mapping, node); 		seq_printf(s, "pg_upmap_items %llu.%x [", pg->pgid.pool,			   pg->pgid.seed);		for (i = 0; i < pg->pg_upmap_items.len; i++)			seq_printf(s, "%s%d->%d", (i == 0 ? "" : ","),				   pg->pg_upmap_items.from_to[i][0],				   pg->pg_upmap_items.from_to[i][1]);		seq_printf(s, "]\n");	} 	up_read(&osdc->lock);	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;	int i; 	mutex_lock(&monc->mutex); 	for (i = 0; i < ARRAY_SIZE(monc->subs); i++) {		seq_printf(s, "have %s %u", ceph_sub_str[i],			   monc->subs[i].have);		if (monc->subs[i].want)			seq_printf(s, " want %llu%s",				   le64_to_cpu(monc->subs[i].item.start),				   (monc->subs[i].item.flags &					CEPH_SUBSCRIBE_ONETIME ?  "" : "+"));		seq_putc(s, '\n');	}	seq_printf(s, "fs_cluster_id %d\n", monc->fs_cluster_id); 	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, "%llu statfs\n", req->tid);		else if (op == CEPH_MSG_MON_GET_VERSION)			seq_printf(s, "%llu mon_get_version", req->tid);		else			seq_printf(s, "%llu unknown\n", req->tid);	} 	mutex_unlock(&monc->mutex);	return 0;} static void dump_spgid(struct seq_file *s, const struct ceph_spg *spgid){	seq_printf(s, "%llu.%x", spgid->pgid.pool, spgid->pgid.seed);	if (spgid->shard != CEPH_SPG_NOSHARD)		seq_printf(s, "s%d", spgid->shard);} static void dump_target(struct seq_file *s, struct ceph_osd_request_target *t){	int i; 	seq_printf(s, "osd%d\t%llu.%x\t", t->osd, t->pgid.pool, t->pgid.seed);	dump_spgid(s, &t->spgid);	seq_puts(s, "\t[");	for (i = 0; i < t->up.size; i++)		seq_printf(s, "%s%d", (!i ? "" : ","), t->up.osds[i]);	seq_printf(s, "]/%d\t[", t->up.primary);	for (i = 0; i < t->acting.size; i++)		seq_printf(s, "%s%d", (!i ? "" : ","), t->acting.osds[i]);	seq_printf(s, "]/%d\te%u\t", t->acting.primary, t->epoch);	if (t->target_oloc.pool_ns) {		seq_printf(s, "%*pE/%*pE\t0x%x",			(int)t->target_oloc.pool_ns->len,			t->target_oloc.pool_ns->str,			t->target_oid.name_len, t->target_oid.name, t->flags);	} else {		seq_printf(s, "%*pE\t0x%x", t->target_oid.name_len,			t->target_oid.name, t->flags);	}	if (t->paused)		seq_puts(s, "\tP");} static void dump_request(struct seq_file *s, struct ceph_osd_request *req){	int i; 	seq_printf(s, "%llu\t", req->r_tid);	dump_target(s, &req->r_t); 	seq_printf(s, "\t%d", req->r_attempts); 	for (i = 0; i < req->r_num_ops; i++) {		struct ceph_osd_req_op *op = &req->r_ops[i]; 		seq_printf(s, "%s%s", (i == 0 ? "\t" : ","),			   ceph_osd_op_name(op->op));		if (op->op == CEPH_OSD_OP_WATCH)			seq_printf(s, "-%s",				   ceph_osd_watch_op_name(op->watch.op));	} 	seq_putc(s, '\n');} static void dump_requests(struct seq_file *s, struct ceph_osd *osd){	struct rb_node *n; 	mutex_lock(&osd->lock);	for (n = rb_first(&osd->o_requests); n; n = rb_next(n)) {		struct ceph_osd_request *req =		    rb_entry(n, struct ceph_osd_request, r_node); 		dump_request(s, req);	} 	mutex_unlock(&osd->lock);} static void dump_linger_request(struct seq_file *s,				struct ceph_osd_linger_request *lreq){	seq_printf(s, "%llu\t", lreq->linger_id);	dump_target(s, &lreq->t); 	seq_printf(s, "\t%u\t%s%s/%d\n", lreq->register_gen,		   lreq->is_watch ? "W" : "N", lreq->committed ? "C" : "",		   lreq->last_error);} static void dump_linger_requests(struct seq_file *s, struct ceph_osd *osd){	struct rb_node *n; 	mutex_lock(&osd->lock);	for (n = rb_first(&osd->o_linger_requests); n; n = rb_next(n)) {		struct ceph_osd_linger_request *lreq =		    rb_entry(n, struct ceph_osd_linger_request, node); 		dump_linger_request(s, lreq);	} 	mutex_unlock(&osd->lock);} static void dump_snapid(struct seq_file *s, u64 snapid){	if (snapid == CEPH_NOSNAP)		seq_puts(s, "head");	else if (snapid == CEPH_SNAPDIR)		seq_puts(s, "snapdir");	else		seq_printf(s, "%llx", snapid);} static void dump_name_escaped(struct seq_file *s, unsigned char *name,			      size_t len){	size_t i; 	for (i = 0; i < len; i++) {		if (name[i] == '%' || name[i] == ':' || name[i] == '/' ||		    name[i] < 32 || name[i] >= 127) {			seq_printf(s, "%%%02x", name[i]);		} else {			seq_putc(s, name[i]);		}	}} static void dump_hoid(struct seq_file *s, const struct ceph_hobject_id *hoid){	if (hoid->snapid == 0 && hoid->hash == 0 && !hoid->is_max &&	    hoid->pool == S64_MIN) {		seq_puts(s, "MIN");		return;	}	if (hoid->is_max) {		seq_puts(s, "MAX");		return;	}	seq_printf(s, "%lld:%08x:", hoid->pool, hoid->hash_reverse_bits);	dump_name_escaped(s, hoid->nspace, hoid->nspace_len);	seq_putc(s, ':');	dump_name_escaped(s, hoid->key, hoid->key_len);	seq_putc(s, ':');	dump_name_escaped(s, hoid->oid, hoid->oid_len);	seq_putc(s, ':');	dump_snapid(s, hoid->snapid);} static void dump_backoffs(struct seq_file *s, struct ceph_osd *osd){	struct rb_node *n; 	mutex_lock(&osd->lock);	for (n = rb_first(&osd->o_backoffs_by_id); n; n = rb_next(n)) {		struct ceph_osd_backoff *backoff =		    rb_entry(n, struct ceph_osd_backoff, id_node); 		seq_printf(s, "osd%d\t", osd->o_osd);		dump_spgid(s, &backoff->spgid);		seq_printf(s, "\t%llu\t", backoff->id);		dump_hoid(s, backoff->begin);		seq_putc(s, '\t');		dump_hoid(s, backoff->end);		seq_putc(s, '\n');	} 	mutex_unlock(&osd->lock);} 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 *n; 	down_read(&osdc->lock);	seq_printf(s, "REQUESTS %d homeless %d\n",		   atomic_read(&osdc->num_requests),		   atomic_read(&osdc->num_homeless));	for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {		struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node); 		dump_requests(s, osd);	}	dump_requests(s, &osdc->homeless_osd); 	seq_puts(s, "LINGER REQUESTS\n");	for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {		struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node); 		dump_linger_requests(s, osd);	}	dump_linger_requests(s, &osdc->homeless_osd); 	seq_puts(s, "BACKOFFS\n");	for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {		struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node); 		dump_backoffs(s, osd);	} 	up_read(&osdc->lock);	return 0;} static int client_options_show(struct seq_file *s, void *p){	struct ceph_client *client = s->private;	int ret; 	ret = ceph_print_client_options(s, client, true);	if (ret)		return ret; 	seq_putc(s, '\n');	return 0;} DEFINE_SHOW_ATTRIBUTE(monmap);DEFINE_SHOW_ATTRIBUTE(osdmap);DEFINE_SHOW_ATTRIBUTE(monc);DEFINE_SHOW_ATTRIBUTE(osdc);DEFINE_SHOW_ATTRIBUTE(client_options); void __init ceph_debugfs_init(void){	ceph_debugfs_dir = debugfs_create_dir("ceph", NULL);} void ceph_debugfs_cleanup(void){	debugfs_remove(ceph_debugfs_dir);} void ceph_debugfs_client_init(struct ceph_client *client){	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); 	client->debugfs_dir = debugfs_create_dir(name, ceph_debugfs_dir); 	client->monc.debugfs_file = debugfs_create_file("monc",						      0400,						      client->debugfs_dir,						      client,						      &monc_fops); 	client->osdc.debugfs_file = debugfs_create_file("osdc",						      0400,						      client->debugfs_dir,						      client,						      &osdc_fops); 	client->debugfs_monmap = debugfs_create_file("monmap",					0400,					client->debugfs_dir,					client,					&monmap_fops); 	client->debugfs_osdmap = debugfs_create_file("osdmap",					0400,					client->debugfs_dir,					client,					&osdmap_fops); 	client->debugfs_options = debugfs_create_file("client_options",					0400,					client->debugfs_dir,					client,					&client_options_fops);} void ceph_debugfs_client_cleanup(struct ceph_client *client){	dout("ceph_debugfs_client_cleanup %p\n", client);	debugfs_remove(client->debugfs_options);	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 */ void __init ceph_debugfs_init(void){} void ceph_debugfs_cleanup(void){} void ceph_debugfs_client_init(struct ceph_client *client){} void ceph_debugfs_client_cleanup(struct ceph_client *client){} #endif  /* CONFIG_DEBUG_FS */