v4.19.13 snapshot.
diff --git a/net/ceph/debugfs.c b/net/ceph/debugfs.c
new file mode 100644
index 0000000..0295260
--- /dev/null
+++ b/net/ceph/debugfs.c
@@ -0,0 +1,498 @@
+// 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.in_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->in_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);
+ if (ret)
+ return ret;
+
+ seq_putc(s, '\n');
+ 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)
+CEPH_DEFINE_SHOW_FUNC(client_options_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 = -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",
+ 0400,
+ client->debugfs_dir,
+ client,
+ &monc_show_fops);
+ if (!client->monc.debugfs_file)
+ goto out;
+
+ client->osdc.debugfs_file = debugfs_create_file("osdc",
+ 0400,
+ client->debugfs_dir,
+ client,
+ &osdc_show_fops);
+ if (!client->osdc.debugfs_file)
+ goto out;
+
+ client->debugfs_monmap = debugfs_create_file("monmap",
+ 0400,
+ client->debugfs_dir,
+ client,
+ &monmap_show_fops);
+ if (!client->debugfs_monmap)
+ goto out;
+
+ client->debugfs_osdmap = debugfs_create_file("osdmap",
+ 0400,
+ client->debugfs_dir,
+ client,
+ &osdmap_show_fops);
+ if (!client->debugfs_osdmap)
+ goto out;
+
+ client->debugfs_options = debugfs_create_file("client_options",
+ 0400,
+ client->debugfs_dir,
+ client,
+ &client_options_show_fops);
+ if (!client->debugfs_options)
+ 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_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 */
+
+int __init 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 */