From: Xiubo Li <xiubli@xxxxxxxxxx> Will send the cap info and dentry lease metric flags to MDS. URL: https://tracker.ceph.com/issues/43435 Signed-off-by: Xiubo Li <xiubli@xxxxxxxxxx> --- fs/ceph/mds_client.c | 47 ++++++++++++++++++++++++++++++++++++++++++-- fs/ceph/mds_client.h | 14 +++++++++++++ 2 files changed, 59 insertions(+), 2 deletions(-) diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c index 3c1ba70f6744..17be7a62873b 100644 --- a/fs/ceph/mds_client.c +++ b/fs/ceph/mds_client.c @@ -1096,6 +1096,41 @@ static void encode_supported_features(void **p, void *end) } } +static const unsigned char metric_bits[] = CEPHFS_METRIC_SPEC_CLIENT_SUPPORTED; +#define METRIC_BYTES(cnt) (DIV_ROUND_UP((size_t)metric_bits[cnt - 1] + 1, 64) * 8) +static void encode_metric_spec(void **p, void *end) +{ + static const size_t count = ARRAY_SIZE(metric_bits); + + /* header */ + BUG_ON(*p + 2 > end); + ceph_encode_8(p, 1); /* version */ + ceph_encode_8(p, 1); /* compat */ + + if (count > 0) { + size_t i; + size_t size = METRIC_BYTES(count); + + BUG_ON(*p + 4 + 4 + size > end); + + /* metric spec info length */ + ceph_encode_32(p, 4 + size); + + /* metric spec */ + ceph_encode_32(p, size); + memset(*p, 0, size); + for (i = 0; i < count; i++) + ((unsigned char*)(*p))[i / 8] |= BIT(metric_bits[i] % 8); + *p += size; + } else { + BUG_ON(*p + 4 + 4 > end); + /* metric spec info length */ + ceph_encode_32(p, 4); + /* metric spec */ + ceph_encode_32(p, 0); + } +} + /* * session message, specialization for CEPH_SESSION_REQUEST_OPEN * to include additional client metadata fields. @@ -1135,6 +1170,13 @@ static struct ceph_msg *create_session_open_msg(struct ceph_mds_client *mdsc, u6 size = FEATURE_BYTES(count); extra_bytes += 4 + size; + /* metric spec */ + size = 0; + count = ARRAY_SIZE(metric_bits); + if (count > 0) + size = METRIC_BYTES(count); + extra_bytes += 2 + 4 + 4 + size; + /* Allocate the message */ msg = ceph_msg_new(CEPH_MSG_CLIENT_SESSION, sizeof(*h) + extra_bytes, GFP_NOFS, false); @@ -1153,9 +1195,9 @@ static struct ceph_msg *create_session_open_msg(struct ceph_mds_client *mdsc, u6 * Serialize client metadata into waiting buffer space, using * the format that userspace expects for map<string, string> * - * ClientSession messages with metadata are v3 + * ClientSession messages with metadata are v4 */ - msg->hdr.version = cpu_to_le16(3); + msg->hdr.version = cpu_to_le16(4); msg->hdr.compat_version = cpu_to_le16(1); /* The write pointer, following the session_head structure */ @@ -1178,6 +1220,7 @@ static struct ceph_msg *create_session_open_msg(struct ceph_mds_client *mdsc, u6 } encode_supported_features(&p, end); + encode_metric_spec(&p, end); msg->front.iov_len = p - msg->front.iov_base; msg->hdr.front_len = cpu_to_le32(msg->front.iov_len); diff --git a/fs/ceph/mds_client.h b/fs/ceph/mds_client.h index dd58ba36d0c9..4094e3bcf329 100644 --- a/fs/ceph/mds_client.h +++ b/fs/ceph/mds_client.h @@ -42,6 +42,20 @@ enum ceph_feature_type { } #define CEPHFS_FEATURES_CLIENT_REQUIRED {} +/* + * This will always have the highest metric bit value + * as the last element of the array. + */ +#define CEPHFS_METRIC_SPEC_CLIENT_SUPPORTED { \ + CLIENT_METRIC_TYPE_CAP_INFO, \ + CLIENT_METRIC_TYPE_READ_LATENCY, \ + CLIENT_METRIC_TYPE_WRITE_LATENCY, \ + CLIENT_METRIC_TYPE_METADATA_LATENCY, \ + CLIENT_METRIC_TYPE_DENTRY_LEASE, \ + \ + CLIENT_METRIC_TYPE_MAX, \ +} + /* * Some lock dependencies: * -- 2.21.0
