static ssize_t osp_md_read(const struct lu_env *env, struct dt_object *dt,
struct lu_buf *rbuf, loff_t *pos)
{
- struct osp_device *osp = lu2osp_dev(dt->do_lu.lo_dev);
- struct dt_device *dt_dev = &osp->opd_dt_dev;
- struct lu_buf *lbuf = &osp_env_info(env)->osi_lb2;
- struct osp_update_request *update = NULL;
+ struct osp_device *osp = lu2osp_dev(dt->do_lu.lo_dev);
+ struct dt_device *dt_dev = &osp->opd_dt_dev;
+ struct lu_buf *lbuf = &osp_env_info(env)->osi_lb2;
+ char *ptr = rbuf->lb_buf;
+ struct osp_update_request *update = NULL;
+ struct ptlrpc_request *req = NULL;
+ struct out_read_reply *orr;
+ struct ptlrpc_bulk_desc *desc;
struct object_update_reply *reply;
- struct out_read_reply *orr;
- char *ptr = rbuf->lb_buf;
- struct ptlrpc_request *req = NULL;
- size_t total_length = rbuf->lb_len;
- size_t max_buf_size;
- loff_t offset = *pos;
- int rc;
+ __u32 left_size;
+ int nbufs;
+ int i;
+ int rc;
ENTRY;
- /* Calculate the maxium buffer length for each read request */
- max_buf_size = OUT_UPDATE_REPLY_SIZE - cfs_size_round(sizeof(*orr)) -
- cfs_size_round(sizeof(struct object_update_result)) -
- cfs_size_round(offsetof(struct object_update_reply,
- ourp_lens[1]));
- while (total_length > 0) {
- size_t read_length;
-
- /* Because it needs send the update buffer right away,
- * just create an update buffer, instead of attaching the
- * update_remote list of the thandle. */
- update = osp_update_request_create(dt_dev);
- if (IS_ERR(update))
- GOTO(out, rc = PTR_ERR(update));
-
- read_length = total_length > max_buf_size ?
- max_buf_size : total_length;
-
- rc = osp_update_rpc_pack(env, read, update, OUT_READ,
- lu_object_fid(&dt->do_lu),
- read_length, offset);
- if (rc != 0) {
- CERROR("%s: cannot insert update: rc = %d\n",
- dt_dev->dd_lu_dev.ld_obd->obd_name, rc);
- GOTO(out, rc);
- }
-
- rc = osp_remote_sync(env, osp, update, &req);
- if (rc < 0)
- GOTO(out, rc);
+ /* Because it needs send the update buffer right away,
+ * just create an update buffer, instead of attaching the
+ * update_remote list of the thandle. */
+ update = osp_update_request_create(dt_dev);
+ if (IS_ERR(update))
+ GOTO(out, rc = PTR_ERR(update));
- reply = req_capsule_server_sized_get(&req->rq_pill,
- &RMF_OUT_UPDATE_REPLY,
- OUT_UPDATE_REPLY_SIZE);
+ rc = osp_update_rpc_pack(env, read, update, OUT_READ,
+ lu_object_fid(&dt->do_lu),
+ rbuf->lb_len, *pos);
+ if (rc != 0) {
+ CERROR("%s: cannot insert update: rc = %d\n",
+ dt_dev->dd_lu_dev.ld_obd->obd_name, rc);
+ GOTO(out, rc);
+ }
- if (reply->ourp_magic != UPDATE_REPLY_MAGIC) {
- CERROR("%s: invalid update reply magic %x expected %x:"
- " rc = %d\n", dt_dev->dd_lu_dev.ld_obd->obd_name,
- reply->ourp_magic, UPDATE_REPLY_MAGIC, -EPROTO);
- GOTO(out, rc = -EPROTO);
- }
+ rc = osp_prep_update_req(env, osp->opd_obd->u.cli.cl_import, update,
+ &req);
+ if (rc != 0)
+ GOTO(out, rc);
- rc = object_update_result_data_get(reply, lbuf, 0);
- if (rc < 0)
- GOTO(out, rc);
+ nbufs = (rbuf->lb_len + OUT_BULK_BUFFER_SIZE - 1) /
+ OUT_BULK_BUFFER_SIZE;
+ /* allocate bulk descriptor */
+ desc = ptlrpc_prep_bulk_imp(req, nbufs, 1,
+ PTLRPC_BULK_PUT_SINK | PTLRPC_BULK_BUF_KVEC,
+ MDS_BULK_PORTAL, &ptlrpc_bulk_kvec_ops);
+ if (desc == NULL)
+ GOTO(out, rc = -ENOMEM);
+
+ /* split the buffer into small chunk size */
+ left_size = rbuf->lb_len;
+ for (i = 0; i < nbufs; i++) {
+ int read_size;
+
+ read_size = left_size > OUT_BULK_BUFFER_SIZE ?
+ OUT_BULK_BUFFER_SIZE : left_size;
+ desc->bd_frag_ops->add_iov_frag(desc, ptr, read_size);
+
+ ptr += read_size;
+ }
- if (lbuf->lb_len < sizeof(*orr))
- GOTO(out, rc = -EPROTO);
+ /* This will only be called with read-only update, and these updates
+ * might be used to retrieve update log during recovery process, so
+ * it will be allowed to send during recovery process */
+ req->rq_allow_replay = 1;
+ req->rq_bulk_read = 1;
+ /* send request to master and wait for RPC to complete */
+ rc = ptlrpc_queue_wait(req);
+ if (rc != 0)
+ GOTO(out, rc);
- orr = lbuf->lb_buf;
- orr_le_to_cpu(orr, orr);
- offset = orr->orr_offset;
- if (orr->orr_size > max_buf_size)
- GOTO(out, rc = -EPROTO);
+ rc = sptlrpc_cli_unwrap_bulk_read(req, req->rq_bulk,
+ req->rq_bulk->bd_nob_transferred);
+ if (rc < 0)
+ GOTO(out, rc);
- memcpy(ptr, orr->orr_data, orr->orr_size);
- ptr += orr->orr_size;
- total_length -= orr->orr_size;
+ reply = req_capsule_server_sized_get(&req->rq_pill,
+ &RMF_OUT_UPDATE_REPLY,
+ OUT_UPDATE_REPLY_SIZE);
- CDEBUG(D_INFO, "%s: read "DFID" pos "LPU64" len %u left %zu\n",
- osp->opd_obd->obd_name, PFID(lu_object_fid(&dt->do_lu)),
- offset, orr->orr_size, total_length);
+ if (reply->ourp_magic != UPDATE_REPLY_MAGIC) {
+ CERROR("%s: invalid update reply magic %x expected %x:"
+ " rc = %d\n", dt_dev->dd_lu_dev.ld_obd->obd_name,
+ reply->ourp_magic, UPDATE_REPLY_MAGIC, -EPROTO);
+ GOTO(out, rc = -EPROTO);
+ }
- if (orr->orr_size < read_length)
- break;
+ rc = object_update_result_data_get(reply, lbuf, 0);
+ if (rc < 0)
+ GOTO(out, rc);
- ptlrpc_req_finished(req);
- osp_update_request_destroy(update);
- req = NULL;
- update = NULL;
- }
+ if (lbuf->lb_len < sizeof(*orr))
+ GOTO(out, rc = -EPROTO);
- total_length = rbuf->lb_len - total_length;
- *pos = offset;
- CDEBUG(D_INFO, "%s: total read "DFID" pos "LPU64" len %zu\n",
- osp->opd_obd->obd_name, PFID(lu_object_fid(&dt->do_lu)),
- *pos, total_length);
- GOTO(out, rc = (int)total_length);
+ orr = lbuf->lb_buf;
+ orr_le_to_cpu(orr, orr);
+ rc = orr->orr_size;
+ *pos = orr->orr_offset;
out:
if (req != NULL)
ptlrpc_req_finished(req);
if (update != NULL)
osp_update_request_destroy(update);
- return rc;
+ RETURN(rc);
}
/* These body operation will be used to write symlinks during migration etc */
struct object_update *update = tti->tti_u.update.tti_update;
struct dt_object *obj = tti->tti_u.update.tti_dt_object;
struct object_update_reply *reply = tti->tti_u.update.tti_update_reply;
- int index = tti->tti_u.update.tti_update_reply_index;
+ int index = tti->tti_u.update.tti_update_reply_index;
+ struct lu_rdbuf *rdbuf = &tti->tti_u.rdbuf.tti_rdbuf;
struct object_update_result *update_result;
- struct lu_buf *lbuf = &tti->tti_buf;
struct out_read_reply *orr;
- void *tmp;
- size_t size;
- __u64 pos;
- int rc;
+ void *tmp;
+ size_t size;
+ size_t total_size = 0;
+ __u64 pos;
+ unsigned int i;
+ unsigned int nbufs;
+ int rc = 0;
ENTRY;
update_result = object_update_result_get(reply, index, NULL);
}
pos = le64_to_cpu(*(__u64 *)(tmp));
- /* Check if the read buffer can hold the read_size */
- if (size > OUT_UPDATE_REPLY_SIZE -
- cfs_size_round(offsetof(struct object_update_reply,
- ourp_lens[1])) -
- cfs_size_round(sizeof(*update_result)) -
- cfs_size_round(sizeof(*orr))) {
- CERROR("%s: get %zu the biggest read size is %d: rc = %d\n",
- tgt_name(tsi->tsi_tgt), size, OUT_UPDATE_REPLY_SIZE,
- -EPROTO);
- GOTO(out, rc = err_serious(-EPROTO));
- }
-
/* Put the offset into the begining of the buffer in reply */
orr = (struct out_read_reply *)update_result->our_data;
- lbuf->lb_buf = orr->orr_data;
- lbuf->lb_len = size;
+ nbufs = (size + OUT_BULK_BUFFER_SIZE - 1) / OUT_BULK_BUFFER_SIZE;
+ OBD_ALLOC(rdbuf->rb_bufs, nbufs * sizeof(rdbuf->rb_bufs[0]));
+ if (rdbuf->rb_bufs == NULL)
+ GOTO(out, rc = -ENOMEM);
- dt_read_lock(env, obj, MOR_TGT_CHILD);
- rc = dt_read(env, obj, lbuf, &pos);
- dt_read_unlock(env, obj);
- orr->orr_size = rc < 0 ? 0 : rc;
+ rdbuf->rb_nbufs = 0;
+ total_size = 0;
+ for (i = 0; i < nbufs; i++) {
+ __u32 read_size;
+
+ OBD_ALLOC_PTR(rdbuf->rb_bufs[i]);
+ if (rdbuf->rb_bufs[i] == NULL)
+ GOTO(out_free, rc = -ENOMEM);
+
+ read_size = size > OUT_BULK_BUFFER_SIZE ?
+ OUT_BULK_BUFFER_SIZE : size;
+ OBD_ALLOC(rdbuf->rb_bufs[i]->lb_buf, read_size);
+ if (rdbuf->rb_bufs[i] == NULL)
+ GOTO(out_free, rc = -ENOMEM);
+
+ rdbuf->rb_bufs[i]->lb_len = read_size;
+ dt_read_lock(env, obj, MOR_TGT_CHILD);
+ rc = dt_read(env, obj, rdbuf->rb_bufs[i], &pos);
+ dt_read_unlock(env, obj);
+
+ total_size += rc < 0 ? 0 : rc;
+ if (rc <= 0)
+ break;
+
+ rdbuf->rb_nbufs++;
+ size -= read_size;
+ }
+
+ rdbuf->rb_bytes = total_size;
+ /* send pages to client */
+ rc = tgt_send_buffer(tsi, rdbuf);
+ if (rc < 0)
+ GOTO(out_free, rc);
+
+ orr->orr_size = total_size;
orr->orr_offset = pos;
orr_cpu_to_le(orr, orr);
update_result->our_datalen += orr->orr_size;
+out_free:
+ for (i = 0; i < nbufs; i++) {
+ if (rdbuf->rb_bufs[i] != NULL) {
+ OBD_FREE(rdbuf->rb_bufs[i]->lb_buf,
+ rdbuf->rb_bufs[i]->lb_len);
+ OBD_FREE_PTR(rdbuf->rb_bufs[i]);
+ }
+ }
+ OBD_FREE(rdbuf->rb_bufs, nbufs * sizeof(rdbuf->rb_bufs[0]));
out:
/* Insert read buffer */
update_result->our_rc = ptlrpc_status_hton(rc);
git://git.whamcloud.com / fs / lustre-release.git / commitdiff