linux/net/ceph/debugfs.c
Greg Kroah-Hartman 1a829ff2a6 ceph: no need to check return value of debugfs_create functions
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>
2019-07-03 16:57:18 +02:00

474 lines
12 KiB
C

// 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;
}
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)
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_show_fops);
client->osdc.debugfs_file = debugfs_create_file("osdc",
0400,
client->debugfs_dir,
client,
&osdc_show_fops);
client->debugfs_monmap = debugfs_create_file("monmap",
0400,
client->debugfs_dir,
client,
&monmap_show_fops);
client->debugfs_osdmap = debugfs_create_file("osdmap",
0400,
client->debugfs_dir,
client,
&osdmap_show_fops);
client->debugfs_options = debugfs_create_file("client_options",
0400,
client->debugfs_dir,
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 */