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![Greg Kroah-Hartman](/assets/img/avatar_default.png)
When calling debugfs functions, there is no need to ever check the return value. The function can work or not, but the code logic should never do something different based on this. This cleanup allows the return value of the functions to be made void, as no logic should care if these files succeed or not. Cc: "Yan, Zheng" <zyan@redhat.com> Cc: Sage Weil <sage@redhat.com> Cc: Ilya Dryomov <idryomov@gmail.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: ceph-devel@vger.kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Link: https://lore.kernel.org/r/20190612145538.GA18772@kroah.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
473 lines
12 KiB
C
473 lines
12 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <linux/ceph/ceph_debug.h>
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#include <linux/device.h>
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#include <linux/slab.h>
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#include <linux/module.h>
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#include <linux/ctype.h>
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#include <linux/debugfs.h>
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#include <linux/seq_file.h>
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#include <linux/ceph/libceph.h>
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#include <linux/ceph/mon_client.h>
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#include <linux/ceph/auth.h>
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#include <linux/ceph/debugfs.h>
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#ifdef CONFIG_DEBUG_FS
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/*
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* Implement /sys/kernel/debug/ceph fun
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*
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* /sys/kernel/debug/ceph/client* - an instance of the ceph client
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* .../osdmap - current osdmap
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* .../monmap - current monmap
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* .../osdc - active osd requests
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* .../monc - mon client state
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* .../client_options - libceph-only (i.e. not rbd or cephfs) options
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* .../dentry_lru - dump contents of dentry lru
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* .../caps - expose cap (reservation) stats
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* .../bdi - symlink to ../../bdi/something
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*/
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static struct dentry *ceph_debugfs_dir;
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static int monmap_show(struct seq_file *s, void *p)
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{
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int i;
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struct ceph_client *client = s->private;
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if (client->monc.monmap == NULL)
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return 0;
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seq_printf(s, "epoch %d\n", client->monc.monmap->epoch);
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for (i = 0; i < client->monc.monmap->num_mon; i++) {
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struct ceph_entity_inst *inst =
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&client->monc.monmap->mon_inst[i];
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seq_printf(s, "\t%s%lld\t%s\n",
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ENTITY_NAME(inst->name),
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ceph_pr_addr(&inst->addr));
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}
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return 0;
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}
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static int osdmap_show(struct seq_file *s, void *p)
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{
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int i;
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struct ceph_client *client = s->private;
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struct ceph_osd_client *osdc = &client->osdc;
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struct ceph_osdmap *map = osdc->osdmap;
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struct rb_node *n;
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if (map == NULL)
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return 0;
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down_read(&osdc->lock);
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seq_printf(s, "epoch %u barrier %u flags 0x%x\n", map->epoch,
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osdc->epoch_barrier, map->flags);
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for (n = rb_first(&map->pg_pools); n; n = rb_next(n)) {
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struct ceph_pg_pool_info *pi =
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rb_entry(n, struct ceph_pg_pool_info, node);
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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",
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pi->id, pi->name, pi->type, pi->size, pi->min_size,
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pi->pg_num, pi->pg_num_mask, pi->flags,
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pi->last_force_request_resend, pi->read_tier,
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pi->write_tier);
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}
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for (i = 0; i < map->max_osd; i++) {
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struct ceph_entity_addr *addr = &map->osd_addr[i];
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u32 state = map->osd_state[i];
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char sb[64];
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seq_printf(s, "osd%d\t%s\t%3d%%\t(%s)\t%3d%%\n",
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i, ceph_pr_addr(addr),
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((map->osd_weight[i]*100) >> 16),
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ceph_osdmap_state_str(sb, sizeof(sb), state),
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((ceph_get_primary_affinity(map, i)*100) >> 16));
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}
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for (n = rb_first(&map->pg_temp); n; n = rb_next(n)) {
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struct ceph_pg_mapping *pg =
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rb_entry(n, struct ceph_pg_mapping, node);
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seq_printf(s, "pg_temp %llu.%x [", pg->pgid.pool,
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pg->pgid.seed);
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for (i = 0; i < pg->pg_temp.len; i++)
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seq_printf(s, "%s%d", (i == 0 ? "" : ","),
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pg->pg_temp.osds[i]);
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seq_printf(s, "]\n");
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}
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for (n = rb_first(&map->primary_temp); n; n = rb_next(n)) {
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struct ceph_pg_mapping *pg =
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rb_entry(n, struct ceph_pg_mapping, node);
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seq_printf(s, "primary_temp %llu.%x %d\n", pg->pgid.pool,
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pg->pgid.seed, pg->primary_temp.osd);
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}
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for (n = rb_first(&map->pg_upmap); n; n = rb_next(n)) {
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struct ceph_pg_mapping *pg =
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rb_entry(n, struct ceph_pg_mapping, node);
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seq_printf(s, "pg_upmap %llu.%x [", pg->pgid.pool,
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pg->pgid.seed);
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for (i = 0; i < pg->pg_upmap.len; i++)
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seq_printf(s, "%s%d", (i == 0 ? "" : ","),
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pg->pg_upmap.osds[i]);
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seq_printf(s, "]\n");
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}
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for (n = rb_first(&map->pg_upmap_items); n; n = rb_next(n)) {
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struct ceph_pg_mapping *pg =
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rb_entry(n, struct ceph_pg_mapping, node);
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seq_printf(s, "pg_upmap_items %llu.%x [", pg->pgid.pool,
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pg->pgid.seed);
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for (i = 0; i < pg->pg_upmap_items.len; i++)
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seq_printf(s, "%s%d->%d", (i == 0 ? "" : ","),
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pg->pg_upmap_items.from_to[i][0],
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pg->pg_upmap_items.from_to[i][1]);
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seq_printf(s, "]\n");
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}
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up_read(&osdc->lock);
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return 0;
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}
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static int monc_show(struct seq_file *s, void *p)
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{
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struct ceph_client *client = s->private;
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struct ceph_mon_generic_request *req;
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struct ceph_mon_client *monc = &client->monc;
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struct rb_node *rp;
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int i;
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mutex_lock(&monc->mutex);
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for (i = 0; i < ARRAY_SIZE(monc->subs); i++) {
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seq_printf(s, "have %s %u", ceph_sub_str[i],
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monc->subs[i].have);
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if (monc->subs[i].want)
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seq_printf(s, " want %llu%s",
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le64_to_cpu(monc->subs[i].item.start),
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(monc->subs[i].item.flags &
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CEPH_SUBSCRIBE_ONETIME ? "" : "+"));
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seq_putc(s, '\n');
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}
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seq_printf(s, "fs_cluster_id %d\n", monc->fs_cluster_id);
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for (rp = rb_first(&monc->generic_request_tree); rp; rp = rb_next(rp)) {
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__u16 op;
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req = rb_entry(rp, struct ceph_mon_generic_request, node);
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op = le16_to_cpu(req->request->hdr.type);
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if (op == CEPH_MSG_STATFS)
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seq_printf(s, "%llu statfs\n", req->tid);
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else if (op == CEPH_MSG_MON_GET_VERSION)
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seq_printf(s, "%llu mon_get_version", req->tid);
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else
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seq_printf(s, "%llu unknown\n", req->tid);
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}
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mutex_unlock(&monc->mutex);
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return 0;
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}
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static void dump_spgid(struct seq_file *s, const struct ceph_spg *spgid)
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{
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seq_printf(s, "%llu.%x", spgid->pgid.pool, spgid->pgid.seed);
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if (spgid->shard != CEPH_SPG_NOSHARD)
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seq_printf(s, "s%d", spgid->shard);
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}
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static void dump_target(struct seq_file *s, struct ceph_osd_request_target *t)
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{
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int i;
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seq_printf(s, "osd%d\t%llu.%x\t", t->osd, t->pgid.pool, t->pgid.seed);
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dump_spgid(s, &t->spgid);
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seq_puts(s, "\t[");
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for (i = 0; i < t->up.size; i++)
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seq_printf(s, "%s%d", (!i ? "" : ","), t->up.osds[i]);
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seq_printf(s, "]/%d\t[", t->up.primary);
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for (i = 0; i < t->acting.size; i++)
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seq_printf(s, "%s%d", (!i ? "" : ","), t->acting.osds[i]);
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seq_printf(s, "]/%d\te%u\t", t->acting.primary, t->epoch);
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if (t->target_oloc.pool_ns) {
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seq_printf(s, "%*pE/%*pE\t0x%x",
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(int)t->target_oloc.pool_ns->len,
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t->target_oloc.pool_ns->str,
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t->target_oid.name_len, t->target_oid.name, t->flags);
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} else {
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seq_printf(s, "%*pE\t0x%x", t->target_oid.name_len,
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t->target_oid.name, t->flags);
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}
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if (t->paused)
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seq_puts(s, "\tP");
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}
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static void dump_request(struct seq_file *s, struct ceph_osd_request *req)
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{
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int i;
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seq_printf(s, "%llu\t", req->r_tid);
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dump_target(s, &req->r_t);
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seq_printf(s, "\t%d", req->r_attempts);
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for (i = 0; i < req->r_num_ops; i++) {
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struct ceph_osd_req_op *op = &req->r_ops[i];
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seq_printf(s, "%s%s", (i == 0 ? "\t" : ","),
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ceph_osd_op_name(op->op));
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if (op->op == CEPH_OSD_OP_WATCH)
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seq_printf(s, "-%s",
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ceph_osd_watch_op_name(op->watch.op));
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}
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seq_putc(s, '\n');
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}
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static void dump_requests(struct seq_file *s, struct ceph_osd *osd)
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{
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struct rb_node *n;
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mutex_lock(&osd->lock);
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for (n = rb_first(&osd->o_requests); n; n = rb_next(n)) {
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struct ceph_osd_request *req =
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rb_entry(n, struct ceph_osd_request, r_node);
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dump_request(s, req);
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}
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mutex_unlock(&osd->lock);
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}
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static void dump_linger_request(struct seq_file *s,
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struct ceph_osd_linger_request *lreq)
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{
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seq_printf(s, "%llu\t", lreq->linger_id);
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dump_target(s, &lreq->t);
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seq_printf(s, "\t%u\t%s%s/%d\n", lreq->register_gen,
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lreq->is_watch ? "W" : "N", lreq->committed ? "C" : "",
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lreq->last_error);
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}
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static void dump_linger_requests(struct seq_file *s, struct ceph_osd *osd)
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{
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struct rb_node *n;
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mutex_lock(&osd->lock);
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for (n = rb_first(&osd->o_linger_requests); n; n = rb_next(n)) {
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struct ceph_osd_linger_request *lreq =
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rb_entry(n, struct ceph_osd_linger_request, node);
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dump_linger_request(s, lreq);
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}
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mutex_unlock(&osd->lock);
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}
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static void dump_snapid(struct seq_file *s, u64 snapid)
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{
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if (snapid == CEPH_NOSNAP)
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seq_puts(s, "head");
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else if (snapid == CEPH_SNAPDIR)
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seq_puts(s, "snapdir");
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else
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seq_printf(s, "%llx", snapid);
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}
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static void dump_name_escaped(struct seq_file *s, unsigned char *name,
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size_t len)
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{
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size_t i;
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for (i = 0; i < len; i++) {
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if (name[i] == '%' || name[i] == ':' || name[i] == '/' ||
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name[i] < 32 || name[i] >= 127) {
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seq_printf(s, "%%%02x", name[i]);
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} else {
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seq_putc(s, name[i]);
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}
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}
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}
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static void dump_hoid(struct seq_file *s, const struct ceph_hobject_id *hoid)
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{
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if (hoid->snapid == 0 && hoid->hash == 0 && !hoid->is_max &&
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hoid->pool == S64_MIN) {
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seq_puts(s, "MIN");
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return;
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}
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if (hoid->is_max) {
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seq_puts(s, "MAX");
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return;
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}
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seq_printf(s, "%lld:%08x:", hoid->pool, hoid->hash_reverse_bits);
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dump_name_escaped(s, hoid->nspace, hoid->nspace_len);
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seq_putc(s, ':');
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dump_name_escaped(s, hoid->key, hoid->key_len);
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seq_putc(s, ':');
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dump_name_escaped(s, hoid->oid, hoid->oid_len);
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seq_putc(s, ':');
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dump_snapid(s, hoid->snapid);
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}
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static void dump_backoffs(struct seq_file *s, struct ceph_osd *osd)
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{
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struct rb_node *n;
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mutex_lock(&osd->lock);
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for (n = rb_first(&osd->o_backoffs_by_id); n; n = rb_next(n)) {
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struct ceph_osd_backoff *backoff =
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rb_entry(n, struct ceph_osd_backoff, id_node);
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seq_printf(s, "osd%d\t", osd->o_osd);
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dump_spgid(s, &backoff->spgid);
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seq_printf(s, "\t%llu\t", backoff->id);
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dump_hoid(s, backoff->begin);
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seq_putc(s, '\t');
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dump_hoid(s, backoff->end);
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seq_putc(s, '\n');
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}
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mutex_unlock(&osd->lock);
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}
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static int osdc_show(struct seq_file *s, void *pp)
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{
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struct ceph_client *client = s->private;
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struct ceph_osd_client *osdc = &client->osdc;
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struct rb_node *n;
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down_read(&osdc->lock);
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seq_printf(s, "REQUESTS %d homeless %d\n",
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atomic_read(&osdc->num_requests),
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atomic_read(&osdc->num_homeless));
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for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
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struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
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dump_requests(s, osd);
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}
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dump_requests(s, &osdc->homeless_osd);
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seq_puts(s, "LINGER REQUESTS\n");
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for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
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struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
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dump_linger_requests(s, osd);
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}
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dump_linger_requests(s, &osdc->homeless_osd);
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seq_puts(s, "BACKOFFS\n");
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for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
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struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
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dump_backoffs(s, osd);
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}
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up_read(&osdc->lock);
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return 0;
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}
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static int client_options_show(struct seq_file *s, void *p)
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{
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struct ceph_client *client = s->private;
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int ret;
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ret = ceph_print_client_options(s, client, true);
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if (ret)
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return ret;
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seq_putc(s, '\n');
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return 0;
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}
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CEPH_DEFINE_SHOW_FUNC(monmap_show)
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CEPH_DEFINE_SHOW_FUNC(osdmap_show)
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CEPH_DEFINE_SHOW_FUNC(monc_show)
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CEPH_DEFINE_SHOW_FUNC(osdc_show)
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CEPH_DEFINE_SHOW_FUNC(client_options_show)
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void __init ceph_debugfs_init(void)
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{
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ceph_debugfs_dir = debugfs_create_dir("ceph", NULL);
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}
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void ceph_debugfs_cleanup(void)
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{
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debugfs_remove(ceph_debugfs_dir);
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}
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void ceph_debugfs_client_init(struct ceph_client *client)
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{
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char name[80];
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snprintf(name, sizeof(name), "%pU.client%lld", &client->fsid,
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client->monc.auth->global_id);
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dout("ceph_debugfs_client_init %p %s\n", client, name);
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client->debugfs_dir = debugfs_create_dir(name, ceph_debugfs_dir);
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client->monc.debugfs_file = debugfs_create_file("monc",
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0400,
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client->debugfs_dir,
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client,
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&monc_show_fops);
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client->osdc.debugfs_file = debugfs_create_file("osdc",
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0400,
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client->debugfs_dir,
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client,
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&osdc_show_fops);
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client->debugfs_monmap = debugfs_create_file("monmap",
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0400,
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client->debugfs_dir,
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client,
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&monmap_show_fops);
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client->debugfs_osdmap = debugfs_create_file("osdmap",
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0400,
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client->debugfs_dir,
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client,
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&osdmap_show_fops);
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client->debugfs_options = debugfs_create_file("client_options",
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0400,
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client->debugfs_dir,
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client,
|
|
&client_options_show_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 */
|