ceph-y := super.o inode.o dir.o file.o locks.o addr.o ioctl.o \
export.o caps.o snap.o xattr.o quota.o io.o \
mds_client.o mdsmap.o strings.o ceph_frag.o \
- debugfs.o util.o metric.o
+ debugfs.o util.o metric.o subvolume_metrics.o
ceph-$(CONFIG_CEPH_FSCACHE) += cache.o
ceph-$(CONFIG_CEPH_FS_POSIX_ACL) += acl.o
#include "mds_client.h"
#include "cache.h"
#include "metric.h"
+#include "subvolume_metrics.h"
#include "crypto.h"
#include <linux/ceph/osd_client.h>
#include <linux/ceph/striper.h>
osd_data->length), false);
}
if (err > 0) {
+ ceph_subvolume_metrics_record_io(fsc->mdsc, ceph_inode(inode),
+ false, err,
+ req->r_start_latency,
+ req->r_end_latency);
subreq->transferred = err;
err = 0;
}
ceph_update_write_metrics(&fsc->mdsc->metric, req->r_start_latency,
req->r_end_latency, len, err);
+ if (err >= 0 && len > 0)
+ ceph_subvolume_metrics_record_io(fsc->mdsc, ci, true, len,
+ req->r_start_latency,
+ req->r_end_latency);
fscrypt_free_bounce_page(bounce_page);
ceph_osdc_put_request(req);
if (err == 0)
ceph_update_write_metrics(&fsc->mdsc->metric, req->r_start_latency,
req->r_end_latency, len, rc);
+ if (rc >= 0 && len > 0)
+ ceph_subvolume_metrics_record_io(mdsc, ci, true, len,
+ req->r_start_latency,
+ req->r_end_latency);
+
ceph_put_wrbuffer_cap_refs(ci, total_pages, snapc);
osd_data = osd_req_op_extent_osd_data(req, 0);
#include <linux/seq_file.h>
#include <linux/math64.h>
#include <linux/ktime.h>
+#include <linux/atomic.h>
#include <linux/ceph/libceph.h>
#include <linux/ceph/mon_client.h>
#include <linux/ceph/auth.h>
#include <linux/ceph/debugfs.h>
+#include <linux/ceph/decode.h>
#include "super.h"
#include "mds_client.h"
#include "metric.h"
+#include "subvolume_metrics.h"
+
+/**
+ * struct ceph_session_feature_desc - Maps feature bits to names for debugfs
+ * @bit: Feature bit number from enum ceph_feature_type (see mds_client.h)
+ * @name: Human-readable feature name for debugfs output
+ *
+ * Used by metric_features_show() to display negotiated session features.
+ */
+struct ceph_session_feature_desc {
+ unsigned int bit;
+ const char *name;
+};
+
+static const struct ceph_session_feature_desc ceph_session_feature_table[] = {
+ { CEPHFS_FEATURE_METRIC_COLLECT, "METRIC_COLLECT" },
+ { CEPHFS_FEATURE_REPLY_ENCODING, "REPLY_ENCODING" },
+ { CEPHFS_FEATURE_RECLAIM_CLIENT, "RECLAIM_CLIENT" },
+ { CEPHFS_FEATURE_LAZY_CAP_WANTED, "LAZY_CAP_WANTED" },
+ { CEPHFS_FEATURE_MULTI_RECONNECT, "MULTI_RECONNECT" },
+ { CEPHFS_FEATURE_DELEG_INO, "DELEG_INO" },
+ { CEPHFS_FEATURE_ALTERNATE_NAME, "ALTERNATE_NAME" },
+ { CEPHFS_FEATURE_NOTIFY_SESSION_STATE, "NOTIFY_SESSION_STATE" },
+ { CEPHFS_FEATURE_OP_GETVXATTR, "OP_GETVXATTR" },
+ { CEPHFS_FEATURE_32BITS_RETRY_FWD, "32BITS_RETRY_FWD" },
+ { CEPHFS_FEATURE_NEW_SNAPREALM_INFO, "NEW_SNAPREALM_INFO" },
+ { CEPHFS_FEATURE_HAS_OWNER_UIDGID, "HAS_OWNER_UIDGID" },
+ { CEPHFS_FEATURE_MDS_AUTH_CAPS_CHECK, "MDS_AUTH_CAPS_CHECK" },
+ { CEPHFS_FEATURE_SUBVOLUME_METRICS, "SUBVOLUME_METRICS" },
+};
static int mdsmap_show(struct seq_file *s, void *p)
{
return 0;
}
+static int subvolume_metrics_show(struct seq_file *s, void *p)
+{
+ struct ceph_fs_client *fsc = s->private;
+ struct ceph_mds_client *mdsc = fsc->mdsc;
+ struct ceph_subvol_metric_snapshot *snapshot = NULL;
+ u32 nr = 0;
+ u64 total_sent = 0;
+ u64 nonzero_sends = 0;
+ u32 i;
+
+ if (!mdsc) {
+ seq_puts(s, "mds client unavailable\n");
+ return 0;
+ }
+
+ mutex_lock(&mdsc->subvol_metrics_last_mutex);
+ if (mdsc->subvol_metrics_last && mdsc->subvol_metrics_last_nr) {
+ nr = mdsc->subvol_metrics_last_nr;
+ snapshot = kmemdup_array(mdsc->subvol_metrics_last, nr,
+ sizeof(*snapshot), GFP_KERNEL);
+ if (!snapshot)
+ nr = 0;
+ }
+ total_sent = mdsc->subvol_metrics_sent;
+ nonzero_sends = mdsc->subvol_metrics_nonzero_sends;
+ mutex_unlock(&mdsc->subvol_metrics_last_mutex);
+
+ seq_puts(s, "Last sent subvolume metrics:\n");
+ if (!nr) {
+ seq_puts(s, " (none)\n");
+ } else {
+ seq_puts(s, " subvol_id rd_ops wr_ops rd_bytes wr_bytes rd_lat_us wr_lat_us\n");
+ for (i = 0; i < nr; i++) {
+ const struct ceph_subvol_metric_snapshot *e = &snapshot[i];
+
+ seq_printf(s, " %-18llu %-9llu %-9llu %-14llu %-14llu %-14llu %-14llu\n",
+ e->subvolume_id,
+ e->read_ops, e->write_ops,
+ e->read_bytes, e->write_bytes,
+ e->read_latency_us, e->write_latency_us);
+ }
+ }
+ kfree(snapshot);
+
+ seq_puts(s, "\nStatistics:\n");
+ seq_printf(s, " entries_sent: %llu\n", total_sent);
+ seq_printf(s, " non_zero_sends: %llu\n", nonzero_sends);
+
+ seq_puts(s, "\nPending (unsent) subvolume metrics:\n");
+ ceph_subvolume_metrics_dump(&mdsc->subvol_metrics, s);
+ return 0;
+}
+
DEFINE_SHOW_ATTRIBUTE(mdsmap);
DEFINE_SHOW_ATTRIBUTE(mdsc);
DEFINE_SHOW_ATTRIBUTE(caps);
DEFINE_SHOW_ATTRIBUTE(metrics_latency);
DEFINE_SHOW_ATTRIBUTE(metrics_size);
DEFINE_SHOW_ATTRIBUTE(metrics_caps);
+DEFINE_SHOW_ATTRIBUTE(subvolume_metrics);
+
+static int metric_features_show(struct seq_file *s, void *p)
+{
+ struct ceph_fs_client *fsc = s->private;
+ struct ceph_mds_client *mdsc = fsc->mdsc;
+ unsigned long session_features = 0;
+ bool have_session = false;
+ bool metric_collect = false;
+ bool subvol_support = false;
+ bool metrics_enabled = false;
+ bool subvol_enabled = false;
+ int i;
+
+ if (!mdsc) {
+ seq_puts(s, "mds client unavailable\n");
+ return 0;
+ }
+
+ mutex_lock(&mdsc->mutex);
+ if (mdsc->metric.session) {
+ have_session = true;
+ session_features = mdsc->metric.session->s_features;
+ }
+ mutex_unlock(&mdsc->mutex);
+
+ if (have_session) {
+ metric_collect =
+ test_bit(CEPHFS_FEATURE_METRIC_COLLECT,
+ &session_features);
+ subvol_support =
+ test_bit(CEPHFS_FEATURE_SUBVOLUME_METRICS,
+ &session_features);
+ }
+
+ metrics_enabled = !disable_send_metrics && have_session && metric_collect;
+ subvol_enabled = metrics_enabled && subvol_support;
+
+ seq_printf(s,
+ "metrics_enabled: %s (disable_send_metrics=%d, session=%s, metric_collect=%s)\n",
+ metrics_enabled ? "yes" : "no",
+ disable_send_metrics ? 1 : 0,
+ have_session ? "yes" : "no",
+ metric_collect ? "yes" : "no");
+ seq_printf(s, "subvolume_metrics_enabled: %s\n",
+ subvol_enabled ? "yes" : "no");
+ seq_printf(s, "session_feature_bits: 0x%lx\n", session_features);
+
+ if (!have_session) {
+ seq_puts(s, "(no active MDS session for metrics)\n");
+ return 0;
+ }
+
+ for (i = 0; i < ARRAY_SIZE(ceph_session_feature_table); i++) {
+ const struct ceph_session_feature_desc *desc =
+ &ceph_session_feature_table[i];
+ bool set = test_bit(desc->bit, &session_features);
+
+ seq_printf(s, " %-24s : %s\n", desc->name,
+ set ? "yes" : "no");
+ }
+
+ return 0;
+}
+DEFINE_SHOW_ATTRIBUTE(metric_features);
/*
* debugfs
debugfs_remove(fsc->debugfs_caps);
debugfs_remove(fsc->debugfs_status);
debugfs_remove(fsc->debugfs_mdsc);
+ debugfs_remove(fsc->debugfs_subvolume_metrics);
debugfs_remove_recursive(fsc->debugfs_metrics_dir);
doutc(fsc->client, "done\n");
}
&metrics_size_fops);
debugfs_create_file("caps", 0400, fsc->debugfs_metrics_dir, fsc,
&metrics_caps_fops);
+ debugfs_create_file("metric_features", 0400, fsc->debugfs_metrics_dir,
+ fsc, &metric_features_fops);
+ fsc->debugfs_subvolume_metrics =
+ debugfs_create_file("subvolumes", 0400,
+ fsc->debugfs_metrics_dir, fsc,
+ &subvolume_metrics_fops);
doutc(fsc->client, "done\n");
}
#include "cache.h"
#include "io.h"
#include "metric.h"
+#include "subvolume_metrics.h"
+
+/*
+ * Record I/O for subvolume metrics tracking.
+ *
+ * Callers must ensure bytes > 0 for reads (ret > 0 check) to avoid counting
+ * EOF as an I/O operation. For writes, the condition is (ret >= 0 && len > 0).
+ */
+static inline void ceph_record_subvolume_io(struct inode *inode, bool is_write,
+ ktime_t start, ktime_t end,
+ size_t bytes)
+{
+ if (!bytes)
+ return;
+
+ ceph_subvolume_metrics_record_io(ceph_sb_to_mdsc(inode->i_sb),
+ ceph_inode(inode),
+ is_write, bytes, start, end);
+}
static __le32 ceph_flags_sys2wire(struct ceph_mds_client *mdsc, u32 flags)
{
req->r_start_latency,
req->r_end_latency,
read_len, ret);
+ /*
+ * Only record subvolume metrics for actual bytes read.
+ * ret == 0 means EOF (no data), not an I/O operation.
+ */
+ if (ret > 0)
+ ceph_record_subvolume_io(inode, false,
+ req->r_start_latency,
+ req->r_end_latency,
+ ret);
if (ret > 0)
objver = req->r_version;
/* r_start_latency == 0 means the request was not submitted */
if (req->r_start_latency) {
- if (aio_req->write)
+ if (aio_req->write) {
ceph_update_write_metrics(metric, req->r_start_latency,
req->r_end_latency, len, rc);
- else
+ if (rc >= 0 && len)
+ ceph_record_subvolume_io(inode, true,
+ req->r_start_latency,
+ req->r_end_latency,
+ len);
+ } else {
ceph_update_read_metrics(metric, req->r_start_latency,
req->r_end_latency, len, rc);
+ if (rc > 0)
+ ceph_record_subvolume_io(inode, false,
+ req->r_start_latency,
+ req->r_end_latency,
+ rc);
+ }
}
put_bvecs(osd_data->bvec_pos.bvecs, osd_data->num_bvecs,
ceph_osdc_start_request(req->r_osdc, req);
ret = ceph_osdc_wait_request(&fsc->client->osdc, req);
- if (write)
+ if (write) {
ceph_update_write_metrics(metric, req->r_start_latency,
req->r_end_latency, len, ret);
- else
+ if (ret >= 0 && len)
+ ceph_record_subvolume_io(inode, true,
+ req->r_start_latency,
+ req->r_end_latency,
+ len);
+ } else {
ceph_update_read_metrics(metric, req->r_start_latency,
req->r_end_latency, len, ret);
+ if (ret > 0)
+ ceph_record_subvolume_io(inode, false,
+ req->r_start_latency,
+ req->r_end_latency,
+ ret);
+ }
size = i_size_read(inode);
if (!write) {
req->r_start_latency,
req->r_end_latency,
read_len, ret);
+ if (ret > 0)
+ ceph_record_subvolume_io(inode, false,
+ req->r_start_latency,
+ req->r_end_latency,
+ ret);
/* Ok if object is not already present */
if (ret == -ENOENT) {
ceph_update_write_metrics(&fsc->mdsc->metric, req->r_start_latency,
req->r_end_latency, len, ret);
+ if (ret >= 0 && write_len)
+ ceph_record_subvolume_io(inode, true,
+ req->r_start_latency,
+ req->r_end_latency,
+ write_len);
ceph_osdc_put_request(req);
if (ret != 0) {
doutc(cl, "osd write returned %d\n", ret);
static const struct ceph_connection_operations mds_con_ops;
+static void ceph_metric_bind_session(struct ceph_mds_client *mdsc,
+ struct ceph_mds_session *session)
+{
+ struct ceph_mds_session *old;
+
+ if (!mdsc || !session || disable_send_metrics)
+ return;
+
+ old = mdsc->metric.session;
+ mdsc->metric.session = ceph_get_mds_session(session);
+ if (old)
+ ceph_put_mds_session(old);
+
+ metric_schedule_delayed(&mdsc->metric);
+}
/*
* mds reply parsing
}
mdsc->s_cap_auths_num = cap_auths_num;
mdsc->s_cap_auths = cap_auths;
+
+ session->s_features = features;
+ if (test_bit(CEPHFS_FEATURE_METRIC_COLLECT,
+ &session->s_features))
+ ceph_metric_bind_session(mdsc, session);
}
if (op == CEPH_SESSION_CLOSE) {
ceph_get_mds_session(session);
pr_info_client(cl, "mds%d reconnect success\n",
session->s_mds);
- session->s_features = features;
+ if (test_bit(CEPHFS_FEATURE_SUBVOLUME_METRICS,
+ &session->s_features))
+ ceph_subvolume_metrics_enable(&mdsc->subvol_metrics, true);
+ else
+ ceph_subvolume_metrics_enable(&mdsc->subvol_metrics, false);
if (session->s_state == CEPH_MDS_SESSION_OPEN) {
pr_notice_client(cl, "mds%d is already opened\n",
session->s_mds);
err = ceph_metric_init(&mdsc->metric);
if (err)
goto err_mdsmap;
+ ceph_subvolume_metrics_init(&mdsc->subvol_metrics);
+ mutex_init(&mdsc->subvol_metrics_last_mutex);
+ mdsc->subvol_metrics_last = NULL;
+ mdsc->subvol_metrics_last_nr = 0;
+ mdsc->subvol_metrics_sent = 0;
+ mdsc->subvol_metrics_nonzero_sends = 0;
spin_lock_init(&mdsc->dentry_list_lock);
INIT_LIST_HEAD(&mdsc->dentry_leases);
ceph_mdsc_stop(mdsc);
ceph_metric_destroy(&mdsc->metric);
+ ceph_subvolume_metrics_destroy(&mdsc->subvol_metrics);
+ kfree(mdsc->subvol_metrics_last);
fsc->mdsc = NULL;
kfree(mdsc);
#include "mdsmap.h"
#include "metric.h"
+#include "subvolume_metrics.h"
#include "super.h"
/* The first 8 bits are reserved for old ceph releases */
CEPHFS_FEATURE_NEW_SNAPREALM_INFO,
CEPHFS_FEATURE_HAS_OWNER_UIDGID,
CEPHFS_FEATURE_MDS_AUTH_CAPS_CHECK,
+ CEPHFS_FEATURE_SUBVOLUME_METRICS,
- CEPHFS_FEATURE_MAX = CEPHFS_FEATURE_MDS_AUTH_CAPS_CHECK,
+ CEPHFS_FEATURE_MAX = CEPHFS_FEATURE_SUBVOLUME_METRICS,
};
#define CEPHFS_FEATURES_CLIENT_SUPPORTED { \
CEPHFS_FEATURE_32BITS_RETRY_FWD, \
CEPHFS_FEATURE_HAS_OWNER_UIDGID, \
CEPHFS_FEATURE_MDS_AUTH_CAPS_CHECK, \
+ CEPHFS_FEATURE_SUBVOLUME_METRICS, \
}
/*
struct list_head dentry_dir_leases; /* lru list */
struct ceph_client_metric metric;
+ struct ceph_subvolume_metrics_tracker subvol_metrics;
+
+ /* Subvolume metrics send tracking */
+ struct mutex subvol_metrics_last_mutex;
+ struct ceph_subvol_metric_snapshot *subvol_metrics_last;
+ u32 subvol_metrics_last_nr;
+ u64 subvol_metrics_sent;
+ u64 subvol_metrics_nonzero_sends;
spinlock_t snapid_map_lock;
struct rb_root snapid_map_tree;
#include <linux/types.h>
#include <linux/percpu_counter.h>
#include <linux/math64.h>
+#include <linux/ratelimit.h>
+
+#include <linux/ceph/decode.h>
#include "metric.h"
#include "mds_client.h"
+static bool metrics_disable_warned;
+
+static inline u32 ceph_subvolume_entry_payload_len(void)
+{
+ return sizeof(struct ceph_subvolume_metric_entry_wire);
+}
+
+static inline u32 ceph_subvolume_entry_encoded_len(void)
+{
+ return CEPH_ENCODING_START_BLK_LEN +
+ ceph_subvolume_entry_payload_len();
+}
+
+static inline u32 ceph_subvolume_outer_payload_len(u32 nr_subvols)
+{
+ /* count is encoded as le64 (size_t on wire) to match FUSE client */
+ return sizeof(__le64) +
+ nr_subvols * ceph_subvolume_entry_encoded_len();
+}
+
+static inline u32 ceph_subvolume_metric_data_len(u32 nr_subvols)
+{
+ return CEPH_ENCODING_START_BLK_LEN +
+ ceph_subvolume_outer_payload_len(nr_subvols);
+}
+
+static inline u32 ceph_subvolume_clamp_u32(u64 val)
+{
+ return val > U32_MAX ? U32_MAX : (u32)val;
+}
+
+static void ceph_init_subvolume_wire_entry(
+ struct ceph_subvolume_metric_entry_wire *dst,
+ const struct ceph_subvol_metric_snapshot *src)
+{
+ dst->subvolume_id = cpu_to_le64(src->subvolume_id);
+ dst->read_ops = cpu_to_le32(ceph_subvolume_clamp_u32(src->read_ops));
+ dst->write_ops = cpu_to_le32(ceph_subvolume_clamp_u32(src->write_ops));
+ dst->read_bytes = cpu_to_le64(src->read_bytes);
+ dst->write_bytes = cpu_to_le64(src->write_bytes);
+ dst->read_latency_us = cpu_to_le64(src->read_latency_us);
+ dst->write_latency_us = cpu_to_le64(src->write_latency_us);
+ dst->time_stamp = 0;
+}
+
+static int ceph_encode_subvolume_metrics(void **p, void *end,
+ struct ceph_subvol_metric_snapshot *subvols,
+ u32 nr_subvols)
+{
+ u32 i;
+
+ ceph_start_encoding(p, 1, 1,
+ ceph_subvolume_outer_payload_len(nr_subvols));
+ /* count is encoded as le64 (size_t on wire) to match FUSE client */
+ ceph_encode_64_safe(p, end, (u64)nr_subvols, enc_err);
+
+ for (i = 0; i < nr_subvols; i++) {
+ struct ceph_subvolume_metric_entry_wire wire_entry;
+
+ ceph_init_subvolume_wire_entry(&wire_entry, &subvols[i]);
+ ceph_start_encoding(p, 1, 1,
+ ceph_subvolume_entry_payload_len());
+ ceph_encode_copy_safe(p, end, &wire_entry,
+ sizeof(wire_entry), enc_err);
+ }
+
+ return 0;
+enc_err:
+ return -ERANGE;
+}
+
static void ktime_to_ceph_timespec(struct ceph_timespec *ts, ktime_t val)
{
struct timespec64 t = ktime_to_timespec64(val);
struct ceph_read_io_size *rsize;
struct ceph_write_io_size *wsize;
struct ceph_client_metric *m = &mdsc->metric;
+ struct ceph_subvol_metric_snapshot *subvols = NULL;
u64 nr_caps = atomic64_read(&m->total_caps);
u32 header_len = sizeof(struct ceph_metric_header);
struct ceph_client *cl = mdsc->fsc->client;
struct ceph_msg *msg;
+ u32 nr_subvols = 0;
+ size_t subvol_len = 0;
+ void *cursor;
s64 sum;
s32 items = 0;
s32 len;
}
mutex_unlock(&mdsc->mutex);
+ if (ceph_subvolume_metrics_enabled(&mdsc->subvol_metrics) &&
+ test_bit(CEPHFS_FEATURE_SUBVOLUME_METRICS, &s->s_features)) {
+ int ret;
+
+ ret = ceph_subvolume_metrics_snapshot(&mdsc->subvol_metrics,
+ &subvols, &nr_subvols,
+ true);
+ if (ret) {
+ pr_warn_client(cl, "failed to snapshot subvolume metrics: %d\n",
+ ret);
+ /*
+ * On error, ceph_subvolume_metrics_snapshot() guarantees
+ * *out = NULL and *nr = 0 at function entry, so subvols
+ * is already NULL here - no cleanup needed.
+ */
+ nr_subvols = 0;
+ subvols = NULL;
+ }
+ }
+
+ if (nr_subvols) {
+ /* type (le32) + ENCODE_START payload - no metric header */
+ subvol_len = sizeof(__le32) +
+ ceph_subvolume_metric_data_len(nr_subvols);
+ }
+
len = sizeof(*head) + sizeof(*cap) + sizeof(*read) + sizeof(*write)
+ sizeof(*meta) + sizeof(*dlease) + sizeof(*files)
+ sizeof(*icaps) + sizeof(*inodes) + sizeof(*rsize)
- + sizeof(*wsize);
+ + sizeof(*wsize) + subvol_len;
msg = ceph_msg_new(CEPH_MSG_CLIENT_METRICS, len, GFP_NOFS, true);
if (!msg) {
pr_err_client(cl, "to mds%d, failed to allocate message\n",
s->s_mds);
+ kfree(subvols);
return false;
}
wsize->total_size = cpu_to_le64(m->metric[METRIC_WRITE].size_sum);
items++;
+ cursor = wsize + 1;
+
+ if (nr_subvols) {
+ void *payload;
+ void *payload_end;
+ int ret;
+
+ /* Emit only the type (le32), no ver/compat/data_len */
+ ceph_encode_32(&cursor, CLIENT_METRIC_TYPE_SUBVOLUME_METRICS);
+ items++;
+
+ payload = cursor;
+ payload_end = (char *)payload +
+ ceph_subvolume_metric_data_len(nr_subvols);
+
+ ret = ceph_encode_subvolume_metrics(&payload, payload_end,
+ subvols, nr_subvols);
+ if (ret) {
+ pr_warn_client(cl,
+ "failed to encode subvolume metrics\n");
+ kfree(subvols);
+ ceph_msg_put(msg);
+ return false;
+ }
+
+ WARN_ON(payload != payload_end);
+ cursor = payload;
+ }
+
put_unaligned_le32(items, &head->num);
- msg->front.iov_len = len;
+ msg->front.iov_len = (char *)cursor - (char *)head;
msg->hdr.version = cpu_to_le16(1);
msg->hdr.compat_version = cpu_to_le16(1);
msg->hdr.front_len = cpu_to_le32(msg->front.iov_len);
+
ceph_con_send(&s->s_con, msg);
+ if (nr_subvols) {
+ mutex_lock(&mdsc->subvol_metrics_last_mutex);
+ kfree(mdsc->subvol_metrics_last);
+ mdsc->subvol_metrics_last = subvols;
+ mdsc->subvol_metrics_last_nr = nr_subvols;
+ mdsc->subvol_metrics_sent += nr_subvols;
+ mdsc->subvol_metrics_nonzero_sends++;
+ mutex_unlock(&mdsc->subvol_metrics_last_mutex);
+
+ subvols = NULL;
+ }
+ kfree(subvols);
+
return true;
}
* Skip it if MDS doesn't support the metric collection,
* or the MDS will close the session's socket connection
* directly when it get this message.
+ *
+ * Also skip sessions that don't support SUBVOLUME_METRICS
+ * when subvolume metrics collection is enabled. This ensures
+ * we only send subvolume metrics to MDSs that understand them.
+ * If no session supports the feature, metrics won't be sent.
*/
if (check_session_state(s) &&
test_bit(CEPHFS_FEATURE_METRIC_COLLECT, &s->s_features)) {
+ if (ceph_subvolume_metrics_enabled(&mdsc->subvol_metrics) &&
+ !test_bit(CEPHFS_FEATURE_SUBVOLUME_METRICS,
+ &s->s_features)) {
+ ceph_put_mds_session(s);
+ continue;
+ }
mdsc->metric.session = s;
break;
}
struct ceph_mds_client *mdsc =
container_of(m, struct ceph_mds_client, metric);
- if (mdsc->stopping || disable_send_metrics)
+ if (mdsc->stopping)
+ return;
+
+ if (disable_send_metrics) {
+ if (!metrics_disable_warned) {
+ pr_info("ceph: metrics sending disabled via module parameter\n");
+ metrics_disable_warned = true;
+ }
return;
+ }
+ metrics_disable_warned = false;
if (!m->session || !check_session_state(m->session)) {
if (m->session) {
}
metric_get_session(mdsc);
}
- if (m->session) {
+
+ if (m->session)
ceph_mdsc_send_metrics(mdsc, m->session);
- metric_schedule_delayed(m);
- }
+ else
+ pr_warn_ratelimited("ceph: metrics worker has no MDS session\n");
+
+ metric_schedule_delayed(m);
}
int ceph_metric_init(struct ceph_client_metric *m)
CLIENT_METRIC_TYPE_STDEV_WRITE_LATENCY,
CLIENT_METRIC_TYPE_AVG_METADATA_LATENCY,
CLIENT_METRIC_TYPE_STDEV_METADATA_LATENCY,
+ CLIENT_METRIC_TYPE_SUBVOLUME_METRICS,
- CLIENT_METRIC_TYPE_MAX = CLIENT_METRIC_TYPE_STDEV_METADATA_LATENCY,
+ CLIENT_METRIC_TYPE_MAX = CLIENT_METRIC_TYPE_SUBVOLUME_METRICS,
};
/*
CLIENT_METRIC_TYPE_STDEV_WRITE_LATENCY, \
CLIENT_METRIC_TYPE_AVG_METADATA_LATENCY, \
CLIENT_METRIC_TYPE_STDEV_METADATA_LATENCY, \
+ CLIENT_METRIC_TYPE_SUBVOLUME_METRICS, \
\
CLIENT_METRIC_TYPE_MAX, \
}
__le64 total_size;
} __packed;
+/**
+ * struct ceph_subvolume_metric_entry_wire - On-wire format sent to MDS
+ * @subvolume_id: Subvolume identifier
+ * @read_ops: Read operation count (32-bit, clamped from 64-bit internal)
+ * @write_ops: Write operation count (32-bit, clamped from 64-bit internal)
+ * @read_bytes: Total bytes read
+ * @write_bytes: Total bytes written
+ * @read_latency_us: Cumulative read latency in microseconds
+ * @write_latency_us: Cumulative write latency in microseconds
+ * @time_stamp: Collection timestamp (currently unused, set to 0)
+ *
+ * Wire format must match C++ AggregatedIOMetrics struct in MDS.
+ */
+struct ceph_subvolume_metric_entry_wire {
+ __le64 subvolume_id;
+ __le32 read_ops;
+ __le32 write_ops;
+ __le64 read_bytes;
+ __le64 write_bytes;
+ __le64 read_latency_us;
+ __le64 write_latency_us;
+ __le64 time_stamp;
+} __packed;
+
+/* Old struct kept for internal tracking, not used on wire */
+struct ceph_subvolume_metric_entry {
+ __le64 subvolume_id;
+ __le64 read_ops;
+ __le64 write_ops;
+ __le64 read_bytes;
+ __le64 write_bytes;
+ __le64 read_latency_us;
+ __le64 write_latency_us;
+} __packed;
+
struct ceph_metric_head {
__le32 num; /* the number of metrics that will be sent */
} __packed;
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/ceph/ceph_debug.h>
+
+#include <linux/math64.h>
+#include <linux/slab.h>
+#include <linux/seq_file.h>
+
+#include "subvolume_metrics.h"
+#include "mds_client.h"
+#include "super.h"
+
+/**
+ * struct ceph_subvol_metric_rb_entry - Per-subvolume I/O metrics node
+ * @node: Red-black tree linkage for tracker->tree
+ * @subvolume_id: Subvolume identifier (key for rb-tree lookup)
+ * @read_ops: Accumulated read operation count since last snapshot
+ * @write_ops: Accumulated write operation count since last snapshot
+ * @read_bytes: Accumulated bytes read since last snapshot
+ * @write_bytes: Accumulated bytes written since last snapshot
+ * @read_latency_us: Sum of read latencies in microseconds
+ * @write_latency_us: Sum of write latencies in microseconds
+ */
+struct ceph_subvol_metric_rb_entry {
+ struct rb_node node;
+ u64 subvolume_id;
+ u64 read_ops;
+ u64 write_ops;
+ u64 read_bytes;
+ u64 write_bytes;
+ u64 read_latency_us;
+ u64 write_latency_us;
+};
+
+static struct kmem_cache *ceph_subvol_metric_entry_cachep;
+
+void ceph_subvolume_metrics_init(struct ceph_subvolume_metrics_tracker *tracker)
+{
+ spin_lock_init(&tracker->lock);
+ tracker->tree = RB_ROOT_CACHED;
+ tracker->nr_entries = 0;
+ tracker->enabled = false;
+ atomic64_set(&tracker->snapshot_attempts, 0);
+ atomic64_set(&tracker->snapshot_empty, 0);
+ atomic64_set(&tracker->snapshot_failures, 0);
+ atomic64_set(&tracker->record_calls, 0);
+ atomic64_set(&tracker->record_disabled, 0);
+ atomic64_set(&tracker->record_no_subvol, 0);
+ atomic64_set(&tracker->total_read_ops, 0);
+ atomic64_set(&tracker->total_read_bytes, 0);
+ atomic64_set(&tracker->total_write_ops, 0);
+ atomic64_set(&tracker->total_write_bytes, 0);
+}
+
+static struct ceph_subvol_metric_rb_entry *
+__lookup_entry(struct ceph_subvolume_metrics_tracker *tracker, u64 subvol_id)
+{
+ struct rb_node *node;
+
+ node = tracker->tree.rb_root.rb_node;
+ while (node) {
+ struct ceph_subvol_metric_rb_entry *entry =
+ rb_entry(node, struct ceph_subvol_metric_rb_entry, node);
+
+ if (subvol_id < entry->subvolume_id)
+ node = node->rb_left;
+ else if (subvol_id > entry->subvolume_id)
+ node = node->rb_right;
+ else
+ return entry;
+ }
+
+ return NULL;
+}
+
+static struct ceph_subvol_metric_rb_entry *
+__insert_entry(struct ceph_subvolume_metrics_tracker *tracker,
+ struct ceph_subvol_metric_rb_entry *entry)
+{
+ struct rb_node **link = &tracker->tree.rb_root.rb_node;
+ struct rb_node *parent = NULL;
+ bool leftmost = true;
+
+ while (*link) {
+ struct ceph_subvol_metric_rb_entry *cur =
+ rb_entry(*link, struct ceph_subvol_metric_rb_entry, node);
+
+ parent = *link;
+ if (entry->subvolume_id < cur->subvolume_id)
+ link = &(*link)->rb_left;
+ else if (entry->subvolume_id > cur->subvolume_id) {
+ link = &(*link)->rb_right;
+ leftmost = false;
+ } else
+ return cur;
+ }
+
+ rb_link_node(&entry->node, parent, link);
+ rb_insert_color_cached(&entry->node, &tracker->tree, leftmost);
+ tracker->nr_entries++;
+ return entry;
+}
+
+static void ceph_subvolume_metrics_clear_locked(
+ struct ceph_subvolume_metrics_tracker *tracker)
+{
+ struct rb_node *node = rb_first_cached(&tracker->tree);
+
+ while (node) {
+ struct ceph_subvol_metric_rb_entry *entry =
+ rb_entry(node, struct ceph_subvol_metric_rb_entry, node);
+ struct rb_node *next = rb_next(node);
+
+ rb_erase_cached(&entry->node, &tracker->tree);
+ tracker->nr_entries--;
+ kmem_cache_free(ceph_subvol_metric_entry_cachep, entry);
+ node = next;
+ }
+
+ tracker->tree = RB_ROOT_CACHED;
+}
+
+void ceph_subvolume_metrics_destroy(struct ceph_subvolume_metrics_tracker *tracker)
+{
+ spin_lock(&tracker->lock);
+ ceph_subvolume_metrics_clear_locked(tracker);
+ tracker->enabled = false;
+ spin_unlock(&tracker->lock);
+}
+
+void ceph_subvolume_metrics_enable(struct ceph_subvolume_metrics_tracker *tracker,
+ bool enable)
+{
+ spin_lock(&tracker->lock);
+ if (enable) {
+ tracker->enabled = true;
+ } else {
+ tracker->enabled = false;
+ ceph_subvolume_metrics_clear_locked(tracker);
+ }
+ spin_unlock(&tracker->lock);
+}
+
+void ceph_subvolume_metrics_record(struct ceph_subvolume_metrics_tracker *tracker,
+ u64 subvol_id, bool is_write,
+ size_t size, u64 latency_us)
+{
+ struct ceph_subvol_metric_rb_entry *entry, *new_entry = NULL;
+ bool retry = false;
+
+ /* CEPH_SUBVOLUME_ID_NONE (0) means unknown/unset subvolume */
+ if (!READ_ONCE(tracker->enabled) ||
+ subvol_id == CEPH_SUBVOLUME_ID_NONE || !size || !latency_us)
+ return;
+
+ /*
+ * Retry loop for lock-free allocation pattern:
+ * 1. First iteration: lookup under lock, if miss -> drop lock, alloc, retry
+ * 2. Second iteration: lookup again (may have been inserted), insert if still missing
+ * 3. On race (another thread inserted same key): free our alloc, retry
+ * All successful paths exit via return, so retry flag doesn't need reset.
+ */
+ do {
+ spin_lock(&tracker->lock);
+ if (!tracker->enabled) {
+ spin_unlock(&tracker->lock);
+ if (new_entry)
+ kmem_cache_free(ceph_subvol_metric_entry_cachep, new_entry);
+ return;
+ }
+
+ entry = __lookup_entry(tracker, subvol_id);
+ if (!entry) {
+ if (!new_entry) {
+ spin_unlock(&tracker->lock);
+ new_entry = kmem_cache_zalloc(ceph_subvol_metric_entry_cachep,
+ GFP_NOFS);
+ if (!new_entry)
+ return;
+ new_entry->subvolume_id = subvol_id;
+ retry = true;
+ continue;
+ }
+ entry = __insert_entry(tracker, new_entry);
+ if (entry != new_entry) {
+ /* raced with another insert */
+ spin_unlock(&tracker->lock);
+ kmem_cache_free(ceph_subvol_metric_entry_cachep, new_entry);
+ new_entry = NULL;
+ retry = true;
+ continue;
+ }
+ new_entry = NULL;
+ }
+
+ if (is_write) {
+ entry->write_ops++;
+ entry->write_bytes += size;
+ entry->write_latency_us += latency_us;
+ atomic64_inc(&tracker->total_write_ops);
+ atomic64_add(size, &tracker->total_write_bytes);
+ } else {
+ entry->read_ops++;
+ entry->read_bytes += size;
+ entry->read_latency_us += latency_us;
+ atomic64_inc(&tracker->total_read_ops);
+ atomic64_add(size, &tracker->total_read_bytes);
+ }
+ spin_unlock(&tracker->lock);
+ if (new_entry)
+ kmem_cache_free(ceph_subvol_metric_entry_cachep, new_entry);
+ return;
+ } while (retry);
+}
+
+int ceph_subvolume_metrics_snapshot(struct ceph_subvolume_metrics_tracker *tracker,
+ struct ceph_subvol_metric_snapshot **out,
+ u32 *nr, bool consume)
+{
+ struct ceph_subvol_metric_snapshot *snap = NULL;
+ struct rb_node *node;
+ u32 count = 0, idx = 0;
+ int ret = 0;
+
+ *out = NULL;
+ *nr = 0;
+
+ if (!READ_ONCE(tracker->enabled))
+ return 0;
+
+ atomic64_inc(&tracker->snapshot_attempts);
+
+ spin_lock(&tracker->lock);
+ for (node = rb_first_cached(&tracker->tree); node; node = rb_next(node)) {
+ struct ceph_subvol_metric_rb_entry *entry =
+ rb_entry(node, struct ceph_subvol_metric_rb_entry, node);
+
+ /* Include entries with ANY I/O activity (read OR write) */
+ if (entry->read_ops || entry->write_ops)
+ count++;
+ }
+ spin_unlock(&tracker->lock);
+
+ if (!count) {
+ atomic64_inc(&tracker->snapshot_empty);
+ return 0;
+ }
+
+ snap = kcalloc(count, sizeof(*snap), GFP_NOFS);
+ if (!snap) {
+ atomic64_inc(&tracker->snapshot_failures);
+ return -ENOMEM;
+ }
+
+ spin_lock(&tracker->lock);
+ node = rb_first_cached(&tracker->tree);
+ while (node) {
+ struct ceph_subvol_metric_rb_entry *entry =
+ rb_entry(node, struct ceph_subvol_metric_rb_entry, node);
+ struct rb_node *next = rb_next(node);
+
+ /* Skip entries with NO I/O activity at all */
+ if (!entry->read_ops && !entry->write_ops) {
+ rb_erase_cached(&entry->node, &tracker->tree);
+ tracker->nr_entries--;
+ kmem_cache_free(ceph_subvol_metric_entry_cachep, entry);
+ node = next;
+ continue;
+ }
+
+ if (idx >= count) {
+ pr_warn("ceph: subvol metrics snapshot race (idx=%u count=%u)\n",
+ idx, count);
+ break;
+ }
+
+ snap[idx].subvolume_id = entry->subvolume_id;
+ snap[idx].read_ops = entry->read_ops;
+ snap[idx].write_ops = entry->write_ops;
+ snap[idx].read_bytes = entry->read_bytes;
+ snap[idx].write_bytes = entry->write_bytes;
+ snap[idx].read_latency_us = entry->read_latency_us;
+ snap[idx].write_latency_us = entry->write_latency_us;
+ idx++;
+
+ if (consume) {
+ entry->read_ops = 0;
+ entry->write_ops = 0;
+ entry->read_bytes = 0;
+ entry->write_bytes = 0;
+ entry->read_latency_us = 0;
+ entry->write_latency_us = 0;
+ rb_erase_cached(&entry->node, &tracker->tree);
+ tracker->nr_entries--;
+ kmem_cache_free(ceph_subvol_metric_entry_cachep, entry);
+ }
+ node = next;
+ }
+ spin_unlock(&tracker->lock);
+
+ if (!idx) {
+ kfree(snap);
+ snap = NULL;
+ ret = 0;
+ } else {
+ *nr = idx;
+ *out = snap;
+ }
+
+ return ret;
+}
+
+void ceph_subvolume_metrics_free_snapshot(struct ceph_subvol_metric_snapshot *snapshot)
+{
+ kfree(snapshot);
+}
+
+/*
+ * Dump subvolume metrics to a seq_file for debugfs.
+ *
+ * Iterates the rb-tree directly under spinlock to avoid allocation.
+ * The lock hold time is minimal since we're only doing seq_printf calls.
+ */
+void ceph_subvolume_metrics_dump(struct ceph_subvolume_metrics_tracker *tracker,
+ struct seq_file *s)
+{
+ struct rb_node *node;
+ bool found = false;
+
+ spin_lock(&tracker->lock);
+ if (!tracker->enabled) {
+ spin_unlock(&tracker->lock);
+ seq_puts(s, "subvolume metrics disabled\n");
+ return;
+ }
+
+ for (node = rb_first_cached(&tracker->tree); node; node = rb_next(node)) {
+ struct ceph_subvol_metric_rb_entry *entry =
+ rb_entry(node, struct ceph_subvol_metric_rb_entry, node);
+ u64 avg_rd_lat, avg_wr_lat;
+
+ if (!entry->read_ops && !entry->write_ops)
+ continue;
+
+ if (!found) {
+ seq_puts(s, "subvol_id rd_ops rd_bytes rd_avg_lat_us wr_ops wr_bytes wr_avg_lat_us\n");
+ seq_puts(s, "------------------------------------------------------------------------------------------------\n");
+ found = true;
+ }
+
+ avg_rd_lat = entry->read_ops ?
+ div64_u64(entry->read_latency_us, entry->read_ops) : 0;
+ avg_wr_lat = entry->write_ops ?
+ div64_u64(entry->write_latency_us, entry->write_ops) : 0;
+
+ seq_printf(s, "%-15llu%-10llu%-12llu%-16llu%-10llu%-12llu%-16llu\n",
+ entry->subvolume_id,
+ entry->read_ops,
+ entry->read_bytes,
+ avg_rd_lat,
+ entry->write_ops,
+ entry->write_bytes,
+ avg_wr_lat);
+ }
+ spin_unlock(&tracker->lock);
+
+ if (!found)
+ seq_puts(s, "(no subvolume metrics collected)\n");
+}
+
+void ceph_subvolume_metrics_record_io(struct ceph_mds_client *mdsc,
+ struct ceph_inode_info *ci,
+ bool is_write, size_t bytes,
+ ktime_t start, ktime_t end)
+{
+ struct ceph_subvolume_metrics_tracker *tracker;
+ u64 subvol_id;
+ s64 delta_us;
+
+ if (!mdsc || !ci || !bytes)
+ return;
+
+ tracker = &mdsc->subvol_metrics;
+ atomic64_inc(&tracker->record_calls);
+
+ if (!ceph_subvolume_metrics_enabled(tracker)) {
+ atomic64_inc(&tracker->record_disabled);
+ return;
+ }
+
+ subvol_id = READ_ONCE(ci->i_subvolume_id);
+ if (subvol_id == CEPH_SUBVOLUME_ID_NONE) {
+ atomic64_inc(&tracker->record_no_subvol);
+ return;
+ }
+
+ delta_us = ktime_to_us(ktime_sub(end, start));
+ if (delta_us <= 0)
+ delta_us = 1;
+
+ ceph_subvolume_metrics_record(tracker, subvol_id, is_write,
+ bytes, (u64)delta_us);
+}
+
+int __init ceph_subvolume_metrics_cache_init(void)
+{
+ ceph_subvol_metric_entry_cachep = KMEM_CACHE(ceph_subvol_metric_rb_entry,
+ SLAB_RECLAIM_ACCOUNT);
+ if (!ceph_subvol_metric_entry_cachep)
+ return -ENOMEM;
+ return 0;
+}
+
+void ceph_subvolume_metrics_cache_destroy(void)
+{
+ kmem_cache_destroy(ceph_subvol_metric_entry_cachep);
+}
--- /dev/null
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _FS_CEPH_SUBVOLUME_METRICS_H
+#define _FS_CEPH_SUBVOLUME_METRICS_H
+
+#include <linux/types.h>
+#include <linux/rbtree.h>
+#include <linux/spinlock.h>
+#include <linux/ktime.h>
+#include <linux/atomic.h>
+
+struct seq_file;
+struct ceph_mds_client;
+struct ceph_inode_info;
+
+/**
+ * struct ceph_subvol_metric_snapshot - Point-in-time snapshot of subvolume metrics
+ * @subvolume_id: Subvolume identifier (inode number of subvolume root)
+ * @read_ops: Number of read operations since last snapshot
+ * @write_ops: Number of write operations since last snapshot
+ * @read_bytes: Total bytes read since last snapshot
+ * @write_bytes: Total bytes written since last snapshot
+ * @read_latency_us: Sum of read latencies in microseconds (for avg calculation)
+ * @write_latency_us: Sum of write latencies in microseconds (for avg calculation)
+ */
+struct ceph_subvol_metric_snapshot {
+ u64 subvolume_id;
+ u64 read_ops;
+ u64 write_ops;
+ u64 read_bytes;
+ u64 write_bytes;
+ u64 read_latency_us;
+ u64 write_latency_us;
+};
+
+/**
+ * struct ceph_subvolume_metrics_tracker - Tracks per-subvolume I/O metrics
+ * @lock: Protects @tree and @nr_entries during concurrent access
+ * @tree: Red-black tree of per-subvolume entries, keyed by subvolume_id
+ * @nr_entries: Number of entries currently in @tree
+ * @enabled: Whether collection is enabled (requires MDS feature support)
+ * @snapshot_attempts: Debug counter: total ceph_subvolume_metrics_snapshot() calls
+ * @snapshot_empty: Debug counter: snapshots that found no data to report
+ * @snapshot_failures: Debug counter: snapshots that failed to allocate memory
+ * @record_calls: Debug counter: total ceph_subvolume_metrics_record() calls
+ * @record_disabled: Debug counter: record calls skipped because disabled
+ * @record_no_subvol: Debug counter: record calls skipped (no subvolume_id)
+ * @total_read_ops: Cumulative read ops across all snapshots (never reset)
+ * @total_read_bytes: Cumulative bytes read across all snapshots (never reset)
+ * @total_write_ops: Cumulative write ops across all snapshots (never reset)
+ * @total_write_bytes: Cumulative bytes written across all snapshots (never reset)
+ */
+struct ceph_subvolume_metrics_tracker {
+ spinlock_t lock;
+ struct rb_root_cached tree;
+ u32 nr_entries;
+ bool enabled;
+ atomic64_t snapshot_attempts;
+ atomic64_t snapshot_empty;
+ atomic64_t snapshot_failures;
+ atomic64_t record_calls;
+ atomic64_t record_disabled;
+ atomic64_t record_no_subvol;
+ atomic64_t total_read_ops;
+ atomic64_t total_read_bytes;
+ atomic64_t total_write_ops;
+ atomic64_t total_write_bytes;
+};
+
+void ceph_subvolume_metrics_init(struct ceph_subvolume_metrics_tracker *tracker);
+void ceph_subvolume_metrics_destroy(struct ceph_subvolume_metrics_tracker *tracker);
+void ceph_subvolume_metrics_enable(struct ceph_subvolume_metrics_tracker *tracker,
+ bool enable);
+void ceph_subvolume_metrics_record(struct ceph_subvolume_metrics_tracker *tracker,
+ u64 subvol_id, bool is_write,
+ size_t size, u64 latency_us);
+int ceph_subvolume_metrics_snapshot(struct ceph_subvolume_metrics_tracker *tracker,
+ struct ceph_subvol_metric_snapshot **out,
+ u32 *nr, bool consume);
+void ceph_subvolume_metrics_free_snapshot(struct ceph_subvol_metric_snapshot *snapshot);
+void ceph_subvolume_metrics_dump(struct ceph_subvolume_metrics_tracker *tracker,
+ struct seq_file *s);
+
+void ceph_subvolume_metrics_record_io(struct ceph_mds_client *mdsc,
+ struct ceph_inode_info *ci,
+ bool is_write, size_t bytes,
+ ktime_t start, ktime_t end);
+
+static inline bool ceph_subvolume_metrics_enabled(
+ const struct ceph_subvolume_metrics_tracker *tracker)
+{
+ return READ_ONCE(tracker->enabled);
+}
+
+int __init ceph_subvolume_metrics_cache_init(void);
+void ceph_subvolume_metrics_cache_destroy(void);
+
+#endif /* _FS_CEPH_SUBVOLUME_METRICS_H */
#include "mds_client.h"
#include "cache.h"
#include "crypto.h"
+#include "subvolume_metrics.h"
#include <linux/ceph/ceph_features.h>
#include <linux/ceph/decode.h>
if (!ceph_wb_pagevec_pool)
goto bad_pagevec_pool;
+ error = ceph_subvolume_metrics_cache_init();
+ if (error)
+ goto bad_subvol_metrics;
+
return 0;
+bad_subvol_metrics:
+ mempool_destroy(ceph_wb_pagevec_pool);
bad_pagevec_pool:
kmem_cache_destroy(ceph_mds_request_cachep);
bad_mds_req:
kmem_cache_destroy(ceph_dir_file_cachep);
kmem_cache_destroy(ceph_mds_request_cachep);
mempool_destroy(ceph_wb_pagevec_pool);
+ ceph_subvolume_metrics_cache_destroy();
}
static void __ceph_umount_begin(struct ceph_fs_client *fsc)
struct dentry *debugfs_status;
struct dentry *debugfs_mds_sessions;
struct dentry *debugfs_metrics_dir;
+ struct dentry *debugfs_subvolume_metrics;
#endif
#ifdef CONFIG_CEPH_FSCACHE
projects / thirdparty / kernel / linux.git / commitdiff
