From: Xiubo Li <xiubli@xxxxxxxxxx> We need to save the real data length to determine exactly how many data we can parse later. URL: https://tracker.ceph.com/issues/62081 Signed-off-by: Xiubo Li <xiubli@xxxxxxxxxx> Reviewed-by: Jeff Layton <jlayton@xxxxxxxxxx> --- include/linux/ceph/osd_client.h | 3 ++- net/ceph/osd_client.c | 7 ++++++- 2 files changed, 8 insertions(+), 2 deletions(-) diff --git a/include/linux/ceph/osd_client.h b/include/linux/ceph/osd_client.h index bf9823956758..f703fb8030de 100644 --- a/include/linux/ceph/osd_client.h +++ b/include/linux/ceph/osd_client.h @@ -45,6 +45,7 @@ enum ceph_sparse_read_state { CEPH_SPARSE_READ_HDR = 0, CEPH_SPARSE_READ_EXTENTS, CEPH_SPARSE_READ_DATA_LEN, + CEPH_SPARSE_READ_DATA_PRE, CEPH_SPARSE_READ_DATA, }; @@ -64,7 +65,7 @@ struct ceph_sparse_read { u64 sr_req_len; /* orig request length */ u64 sr_pos; /* current pos in buffer */ int sr_index; /* current extent index */ - __le32 sr_datalen; /* length of actual data */ + u32 sr_datalen; /* length of actual data */ u32 sr_count; /* extent count in reply */ int sr_ext_len; /* length of extent array */ struct ceph_sparse_extent *sr_extent; /* extent array */ diff --git a/net/ceph/osd_client.c b/net/ceph/osd_client.c index 1f749a7b4444..0e629dfd55ee 100644 --- a/net/ceph/osd_client.c +++ b/net/ceph/osd_client.c @@ -5911,8 +5911,13 @@ static int osd_sparse_read(struct ceph_connection *con, convert_extent_map(sr); ret = sizeof(sr->sr_datalen); *pbuf = (char *)&sr->sr_datalen; - sr->sr_state = CEPH_SPARSE_READ_DATA; + sr->sr_state = CEPH_SPARSE_READ_DATA_PRE; break; + case CEPH_SPARSE_READ_DATA_PRE: + /* Convert sr_datalen to host-endian */ + sr->sr_datalen = le32_to_cpu((__force __le32)sr->sr_datalen); + sr->sr_state = CEPH_SPARSE_READ_DATA; + fallthrough; case CEPH_SPARSE_READ_DATA: if (sr->sr_index >= count) { sr->sr_state = CEPH_SPARSE_READ_HDR; -- 2.39.1
