* GPL HEADER END
*/
/*
- * Copyright (c) 2014, Intel Corporation.
+ * Copyright (c) 2015, 2017, Intel Corporation.
*/
/*
* lustre/target/update_trans.c
#define DEBUG_SUBSYSTEM S_CLASS
+#include <linux/kthread.h>
#include <lu_target.h>
#include <lustre_log.h>
#include <lustre_update.h>
#include <obd_class.h>
#include <tgt_internal.h>
+#include <tgt_internal.h>
+/**
+ * Dump top mulitple thandle
+ *
+ * Dump top multiple thandle and all of its sub thandle to the debug log.
+ *
+ * \param[in]mask debug mask
+ * \param[in]top_th top_thandle to be dumped
+ */
+static void top_multiple_thandle_dump(struct top_multiple_thandle *tmt,
+ __u32 mask)
+{
+ struct sub_thandle *st;
+
+ LASSERT(tmt->tmt_magic == TOP_THANDLE_MAGIC);
+ CDEBUG(mask, "%s tmt %p refcount %d committed %d result %d batchid %llu\n",
+ tmt->tmt_master_sub_dt ?
+ tmt->tmt_master_sub_dt->dd_lu_dev.ld_obd->obd_name :
+ "NULL",
+ tmt, atomic_read(&tmt->tmt_refcount), tmt->tmt_committed,
+ tmt->tmt_result, tmt->tmt_batchid);
+
+ list_for_each_entry(st, &tmt->tmt_sub_thandle_list, st_sub_list) {
+ struct sub_thandle_cookie *stc;
+
+ CDEBUG(mask, "st %p obd %s committed %d started %d stopped %d "
+ "result %d sub_th %p\n",
+ st, st->st_dt->dd_lu_dev.ld_obd->obd_name,
+ st->st_committed, st->st_started, st->st_stopped,
+ st->st_result, st->st_sub_th);
+
+ list_for_each_entry(stc, &st->st_cookie_list, stc_list) {
+ CDEBUG(mask, " cookie "DFID".%u\n",
+ PFID(&stc->stc_cookie.lgc_lgl.lgl_oi.oi_fid),
+ stc->stc_cookie.lgc_index);
+ }
+ }
+}
+
/**
* Declare write update to sub device
*
*
* \param[in] env execution environment
* \param[in] record update records being written
- * \param[in] lst sub transaction handle
+ * \param[in] sub_th sub transaction handle
+ * \param[in] record_size total update record size
*
* \retval 0 if writing succeeds
* \retval negative errno if writing fails
*/
static int sub_declare_updates_write(const struct lu_env *env,
struct llog_update_record *record,
- struct sub_thandle *lst)
+ struct thandle *sub_th, size_t record_size)
{
struct llog_ctxt *ctxt;
- struct dt_device *dt = lst->st_sub_th->th_dev;
+ struct dt_device *dt = sub_th->th_dev;
+ int left = record_size;
int rc;
/* If ctxt is NULL, it means not need to write update,
* for example if the the OSP is used to connect to OST */
ctxt = llog_get_context(dt->dd_lu_dev.ld_obd,
LLOG_UPDATELOG_ORIG_CTXT);
- LASSERT(ctxt != NULL);
/* Not ready to record updates yet. */
- if (ctxt->loc_handle == NULL) {
+ if (ctxt == NULL || ctxt->loc_handle == NULL) {
llog_ctxt_put(ctxt);
return 0;
}
- rc = llog_declare_add(env, ctxt->loc_handle, &record->lur_hdr,
- lst->st_sub_th);
+ rc = llog_declare_add(env, ctxt->loc_handle,
+ &record->lur_hdr, sub_th);
+ if (rc < 0)
+ GOTO(out_put, rc);
+ while (left > ctxt->loc_chunk_size) {
+ rc = llog_declare_add(env, ctxt->loc_handle,
+ &record->lur_hdr, sub_th);
+ if (rc < 0)
+ GOTO(out_put, rc);
+
+ left -= ctxt->loc_chunk_size;
+ }
+
+out_put:
llog_ctxt_put(ctxt);
return rc;
/**
* write update to sub device
*
- * Write updates llog records to the sub device during distribute
- * transaction.
+ * Write llog update record to the sub device during distribute
+ * transaction. If it succeeds, llog cookie of the record will be
+ * returned by @cookie.
*
* \param[in] env execution environment
* \param[in] record update records being written
- * \param[in] lst sub transaction handle
+ * \param[in] sub_th sub transaction handle
+ * \param[out] cookie llog cookie of the update record.
*
* \retval 1 if writing succeeds
* \retval negative errno if writing fails
*/
static int sub_updates_write(const struct lu_env *env,
struct llog_update_record *record,
- struct sub_thandle *lst)
+ struct sub_thandle *sub_th)
{
- struct llog_ctxt *ctxt;
- struct dt_device *dt = lst->st_sub_th->th_dev;
- int rc;
+ struct dt_device *dt = sub_th->st_dt;
+ struct llog_ctxt *ctxt;
+ struct llog_update_record *lur = NULL;
+ __u32 update_count = 0;
+ __u32 param_count = 0;
+ __u32 last_update_count = 0;
+ __u32 last_param_count = 0;
+ char *start;
+ char *cur;
+ char *next;
+ struct sub_thandle_cookie *stc;
+ size_t reclen;
+ bool eof = false;
+ int rc;
+ ENTRY;
ctxt = llog_get_context(dt->dd_lu_dev.ld_obd,
LLOG_UPDATELOG_ORIG_CTXT);
- LASSERT(ctxt != NULL);
-
- /* Not ready to record updates yet, usually happens
- * in error handler path */
- if (ctxt->loc_handle == NULL) {
+ /* If ctxt == NULL, then it means updates on OST (only happens
+ * during migration), and we do not track those updates for now */
+ /* If ctxt->loc_handle == NULL, then it does not need to record
+ * update, usually happens in error handler path */
+ if (ctxt == NULL || ctxt->loc_handle == NULL) {
llog_ctxt_put(ctxt);
- return 0;
+ RETURN(0);
}
+ /* Since the cross-MDT updates will includes both local
+ * and remote updates, the update ops count must > 1 */
+ LASSERT(record->lur_update_rec.ur_update_count > 1);
LASSERTF(record->lur_hdr.lrh_len == llog_update_record_size(record),
"lrh_len %u record_size %zu\n", record->lur_hdr.lrh_len,
llog_update_record_size(record));
- rc = llog_add(env, ctxt->loc_handle, &record->lur_hdr,
- NULL, lst->st_sub_th);
+ /*
+ * If its size > llog chunk_size, then write current chunk to the update
+ * llog, NB the padding should >= LLOG_MIN_REC_SIZE.
+ *
+ * So check padding length is either >= LLOG_MIN_REC_SIZE or is 0
+ * (record length just matches the chunk size).
+ */
+
+ reclen = record->lur_hdr.lrh_len;
+ if (reclen + LLOG_MIN_REC_SIZE <= ctxt->loc_chunk_size ||
+ reclen == ctxt->loc_chunk_size) {
+ OBD_ALLOC_PTR(stc);
+ if (stc == NULL)
+ GOTO(llog_put, rc = -ENOMEM);
+ INIT_LIST_HEAD(&stc->stc_list);
+ rc = llog_add(env, ctxt->loc_handle, &record->lur_hdr,
+ &stc->stc_cookie, sub_th->st_sub_th);
+
+ CDEBUG(D_INFO, "%s: Add update log "DFID".%u: rc = %d\n",
+ dt->dd_lu_dev.ld_obd->obd_name,
+ PFID(&stc->stc_cookie.lgc_lgl.lgl_oi.oi_fid),
+ stc->stc_cookie.lgc_index, rc);
+
+ if (rc > 0) {
+ list_add(&stc->stc_list, &sub_th->st_cookie_list);
+ rc = 0;
+ } else {
+ OBD_FREE_PTR(stc);
+ }
+
+ GOTO(llog_put, rc);
+ }
+
+ /* Split the records into chunk_size update record */
+ OBD_ALLOC_LARGE(lur, ctxt->loc_chunk_size);
+ if (lur == NULL)
+ GOTO(llog_put, rc = -ENOMEM);
+
+ memcpy(lur, &record->lur_hdr, sizeof(record->lur_hdr));
+ lur->lur_update_rec.ur_update_count = 0;
+ lur->lur_update_rec.ur_param_count = 0;
+ start = (char *)&record->lur_update_rec.ur_ops;
+ cur = next = start;
+ do {
+ if (update_count < record->lur_update_rec.ur_update_count)
+ next = (char *)update_op_next_op(
+ (struct update_op *)cur);
+ else if (param_count < record->lur_update_rec.ur_param_count)
+ next = (char *)update_param_next_param(
+ (struct update_param *)cur);
+ else
+ eof = true;
+
+ reclen = __llog_update_record_size(
+ __update_records_size(next - start));
+ if ((reclen + LLOG_MIN_REC_SIZE <= ctxt->loc_chunk_size ||
+ reclen == ctxt->loc_chunk_size) &&
+ !eof) {
+ cur = next;
+
+ if (update_count <
+ record->lur_update_rec.ur_update_count)
+ update_count++;
+ else if (param_count <
+ record->lur_update_rec.ur_param_count)
+ param_count++;
+ continue;
+ }
+
+ lur->lur_update_rec.ur_update_count = update_count -
+ last_update_count;
+ lur->lur_update_rec.ur_param_count = param_count -
+ last_param_count;
+ memcpy(&lur->lur_update_rec.ur_ops, start, cur - start);
+ lur->lur_hdr.lrh_len = llog_update_record_size(lur);
+
+ LASSERT(lur->lur_hdr.lrh_len ==
+ __llog_update_record_size(
+ __update_records_size(cur - start)));
+ LASSERT(lur->lur_hdr.lrh_len <= ctxt->loc_chunk_size);
+
+ update_records_dump(&lur->lur_update_rec, D_INFO, true);
+
+ OBD_ALLOC_PTR(stc);
+ if (stc == NULL)
+ GOTO(llog_put, rc = -ENOMEM);
+ INIT_LIST_HEAD(&stc->stc_list);
+
+ rc = llog_add(env, ctxt->loc_handle, &lur->lur_hdr,
+ &stc->stc_cookie, sub_th->st_sub_th);
+
+ CDEBUG(D_INFO, "%s: Add update log "DFID".%u: rc = %d\n",
+ dt->dd_lu_dev.ld_obd->obd_name,
+ PFID(&stc->stc_cookie.lgc_lgl.lgl_oi.oi_fid),
+ stc->stc_cookie.lgc_index, rc);
+
+ if (rc > 0) {
+ list_add(&stc->stc_list, &sub_th->st_cookie_list);
+ rc = 0;
+ } else {
+ OBD_FREE_PTR(stc);
+ GOTO(llog_put, rc);
+ }
+
+ last_update_count = update_count;
+ last_param_count = param_count;
+ start = cur;
+ lur->lur_update_rec.ur_update_count = 0;
+ lur->lur_update_rec.ur_param_count = 0;
+ lur->lur_update_rec.ur_flags |= UPDATE_RECORD_CONTINUE;
+ } while (!eof);
+
+llog_put:
+ if (lur != NULL)
+ OBD_FREE_LARGE(lur, ctxt->loc_chunk_size);
llog_ctxt_put(ctxt);
- return rc;
+ RETURN(rc);
}
/**
- * write update transaction
+ * Prepare the update records.
*
- * Check if there are updates being recorded in this transaction,
- * it will write the record into the disk.
+ * Merge params and ops into the update records, then initializing
+ * the update buffer.
+ *
+ * During transaction execution phase, parameters and update ops
+ * are collected in two different buffers (see lod_updates_pack()),
+ * during transaction stop, it needs to be merged in one buffer,
+ * so it will be written in the update log.
*
* \param[in] env execution environment
- * \param[in] top_th top transaction handle
+ * \param[in] tmt top_multiple_thandle for distribute txn
*
- * \retval 0 if writing succeeds
- * \retval negative errno if writing fails
+ * \retval 0 if merging succeeds.
+ * \retval negaitive errno if merging fails.
*/
-static int top_updates_write(const struct lu_env *env,
- struct top_thandle *top_th)
+static int prepare_writing_updates(const struct lu_env *env,
+ struct top_multiple_thandle *tmt)
{
- struct thandle_update_records *tur;
- struct llog_update_record *lur;
- struct sub_thandle *lst;
- int rc;
- ENTRY;
+ struct thandle_update_records *tur = tmt->tmt_update_records;
+ struct llog_update_record *lur;
+ struct update_params *params;
+ size_t params_size;
+ size_t update_size;
- if (top_th->tt_update_records == NULL)
- RETURN(0);
+ if (tur == NULL || tur->tur_update_records == NULL ||
+ tur->tur_update_params == NULL)
+ return 0;
- tur = top_th->tt_update_records;
+ lur = tur->tur_update_records;
+ /* Extends the update records buffer if needed */
+ params_size = update_params_size(tur->tur_update_params,
+ tur->tur_update_param_count);
+ LASSERT(lur->lur_update_rec.ur_param_count == 0);
+ update_size = llog_update_record_size(lur);
+ if (cfs_size_round(update_size + params_size) >
+ tur->tur_update_records_buf_size) {
+ int rc;
- /* merge the parameters and updates into one buffer */
- rc = merge_params_updates_buf(env, tur);
- if (rc < 0)
- RETURN(rc);
+ rc = tur_update_records_extend(tur,
+ cfs_size_round(update_size + params_size));
+ if (rc < 0)
+ return rc;
- lur = tur->tur_update_records;
- /* Dump updates to debug log */
- update_records_dump(&lur->lur_update_rec, D_INFO, true);
+ lur = tur->tur_update_records;
+ }
+ params = update_records_get_params(&lur->lur_update_rec);
+ memcpy(params, tur->tur_update_params, params_size);
+
+ lur->lur_update_rec.ur_param_count = tur->tur_update_param_count;
+ lur->lur_update_rec.ur_batchid = tmt->tmt_batchid;
/* Init update record header */
lur->lur_hdr.lrh_len = llog_update_record_size(lur);
lur->lur_hdr.lrh_type = UPDATE_REC;
- list_for_each_entry(lst, &top_th->tt_sub_thandle_list, st_sub_list) {
- if (!lst->st_record_update)
+ /* Dump updates for debugging purpose */
+ update_records_dump(&lur->lur_update_rec, D_INFO, true);
+
+ return 0;
+}
+
+/**
+ * Top thandle commit callback
+ *
+ * This callback will be called when all of sub transactions are committed.
+ *
+ * \param[in] th top thandle to be committed.
+ */
+static void top_trans_committed_cb(struct top_multiple_thandle *tmt)
+{
+ struct lu_target *lut;
+ ENTRY;
+
+ LASSERT(atomic_read(&tmt->tmt_refcount) > 0);
+
+ top_multiple_thandle_dump(tmt, D_HA);
+ tmt->tmt_committed = 1;
+ lut = dt2lu_dev(tmt->tmt_master_sub_dt)->ld_site->ls_tgt;
+ if (lut->lut_tdtd && lut->lut_tdtd->tdtd_commit_task)
+ wake_up_process(lut->lut_tdtd->tdtd_commit_task);
+
+ RETURN_EXIT;
+}
+
+struct sub_thandle *lookup_sub_thandle(struct top_multiple_thandle *tmt,
+ struct dt_device *dt_dev)
+{
+ struct sub_thandle *st;
+
+ list_for_each_entry(st, &tmt->tmt_sub_thandle_list, st_sub_list) {
+ if (st->st_dt == dt_dev)
+ return st;
+ }
+ return NULL;
+}
+EXPORT_SYMBOL(lookup_sub_thandle);
+
+struct sub_thandle *create_sub_thandle(struct top_multiple_thandle *tmt,
+ struct dt_device *dt_dev)
+{
+ struct sub_thandle *st;
+
+ OBD_ALLOC_PTR(st);
+ if (st == NULL)
+ RETURN(ERR_PTR(-ENOMEM));
+
+ INIT_LIST_HEAD(&st->st_sub_list);
+ INIT_LIST_HEAD(&st->st_cookie_list);
+ st->st_dt = dt_dev;
+
+ list_add(&st->st_sub_list, &tmt->tmt_sub_thandle_list);
+ return st;
+}
+
+static void sub_trans_commit_cb_internal(struct top_multiple_thandle *tmt,
+ struct thandle *sub_th, int err)
+{
+ struct sub_thandle *st;
+ bool all_committed = true;
+
+ /* Check if all sub thandles are committed */
+ spin_lock(&tmt->tmt_sub_lock);
+ list_for_each_entry(st, &tmt->tmt_sub_thandle_list, st_sub_list) {
+ if (st->st_sub_th == sub_th) {
+ st->st_committed = 1;
+ st->st_result = err;
+ }
+ if (!st->st_committed)
+ all_committed = false;
+ }
+ spin_unlock(&tmt->tmt_sub_lock);
+
+ if (tmt->tmt_result == 0)
+ tmt->tmt_result = err;
+
+ if (all_committed)
+ top_trans_committed_cb(tmt);
+
+ top_multiple_thandle_dump(tmt, D_INFO);
+ top_multiple_thandle_put(tmt);
+ RETURN_EXIT;
+}
+
+/**
+ * sub thandle commit callback
+ *
+ * Mark the sub thandle to be committed and if all sub thandle are committed
+ * notify the top thandle.
+ *
+ * \param[in] env execution environment
+ * \param[in] sub_th sub thandle being committed
+ * \param[in] cb commit callback
+ * \param[in] err trans result
+ */
+static void sub_trans_commit_cb(struct lu_env *env,
+ struct thandle *sub_th,
+ struct dt_txn_commit_cb *cb, int err)
+{
+ struct top_multiple_thandle *tmt = cb->dcb_data;
+
+ sub_trans_commit_cb_internal(tmt, sub_th, err);
+}
+
+static void sub_thandle_register_commit_cb(struct sub_thandle *st,
+ struct top_multiple_thandle *tmt)
+{
+ LASSERT(st->st_sub_th != NULL);
+ top_multiple_thandle_get(tmt);
+ st->st_commit_dcb.dcb_func = sub_trans_commit_cb;
+ st->st_commit_dcb.dcb_data = tmt;
+ INIT_LIST_HEAD(&st->st_commit_dcb.dcb_linkage);
+ dt_trans_cb_add(st->st_sub_th, &st->st_commit_dcb);
+}
+
+/**
+ * Sub thandle stop call back
+ *
+ * After sub thandle is stopped, it will call this callback to notify
+ * the top thandle.
+ *
+ * \param[in] th sub thandle to be stopped
+ * \param[in] rc result of sub trans
+ */
+static void sub_trans_stop_cb(struct lu_env *env,
+ struct thandle *sub_th,
+ struct dt_txn_commit_cb *cb, int err)
+{
+ struct sub_thandle *st;
+ struct top_multiple_thandle *tmt = cb->dcb_data;
+ ENTRY;
+
+ spin_lock(&tmt->tmt_sub_lock);
+ list_for_each_entry(st, &tmt->tmt_sub_thandle_list, st_sub_list) {
+ if (st->st_stopped)
continue;
- rc = sub_updates_write(env, lur, lst);
- if (rc < 0)
+
+ if (st->st_dt == sub_th->th_dev) {
+ st->st_stopped = 1;
+ st->st_result = err;
break;
+ }
}
+ spin_unlock(&tmt->tmt_sub_lock);
- if (rc > 0)
- rc = 0;
+ wake_up(&tmt->tmt_stop_waitq);
+ RETURN_EXIT;
+}
- RETURN(rc);
+static void sub_thandle_register_stop_cb(struct sub_thandle *st,
+ struct top_multiple_thandle *tmt)
+{
+ st->st_stop_dcb.dcb_func = sub_trans_stop_cb;
+ st->st_stop_dcb.dcb_data = tmt;
+ st->st_stop_dcb.dcb_flags = DCB_TRANS_STOP;
+ INIT_LIST_HEAD(&st->st_stop_dcb.dcb_linkage);
+ dt_trans_cb_add(st->st_sub_th, &st->st_stop_dcb);
+}
+
+/**
+ * Create sub thandle
+ *
+ * Create transaction handle for sub_thandle
+ *
+ * \param[in] env execution environment
+ * \param[in] th top thandle
+ * \param[in] st sub_thandle
+ *
+ * \retval 0 if creation succeeds.
+ * \retval negative errno if creation fails.
+ */
+int sub_thandle_trans_create(const struct lu_env *env,
+ struct top_thandle *top_th,
+ struct sub_thandle *st)
+{
+ struct thandle *sub_th;
+
+ sub_th = dt_trans_create(env, st->st_dt);
+ if (IS_ERR(sub_th))
+ return PTR_ERR(sub_th);
+
+ sub_th->th_top = &top_th->tt_super;
+ st->st_sub_th = sub_th;
+
+ sub_th->th_wait_submit = 1;
+ sub_thandle_register_stop_cb(st, top_th->tt_multiple_thandle);
+ return 0;
}
/**
if (top_th == NULL)
return ERR_PTR(-ENOMEM);
- child_th = dt_trans_create(env, master_dev);
- if (IS_ERR(child_th)) {
- OBD_FREE_PTR(top_th);
- return child_th;
- }
-
- top_th->tt_magic = TOP_THANDLE_MAGIC;
- top_th->tt_master_sub_thandle = child_th;
- child_th->th_top = &top_th->tt_super;
-
- top_th->tt_update_records = NULL;
top_th->tt_super.th_top = &top_th->tt_super;
- INIT_LIST_HEAD(&top_th->tt_sub_thandle_list);
+ if (master_dev != NULL) {
+ child_th = dt_trans_create(env, master_dev);
+ if (IS_ERR(child_th)) {
+ OBD_FREE_PTR(top_th);
+ return child_th;
+ }
+
+ child_th->th_top = &top_th->tt_super;
+ child_th->th_wait_submit = 1;
+ top_th->tt_master_sub_thandle = child_th;
+ }
return &top_th->tt_super;
}
EXPORT_SYMBOL(top_trans_create);
/**
+ * Declare write update transaction
+ *
+ * Check if there are updates being recorded in this transaction,
+ * it will write the record into the disk.
+ *
+ * \param[in] env execution environment
+ * \param[in] tmt top multiple transaction handle
+ *
+ * \retval 0 if writing succeeds
+ * \retval negative errno if writing fails
+ */
+static int declare_updates_write(const struct lu_env *env,
+ struct top_multiple_thandle *tmt)
+{
+ struct llog_update_record *record;
+ struct sub_thandle *st;
+ int rc = 0;
+
+ record = tmt->tmt_update_records->tur_update_records;
+ /* Declare update write for all other target */
+ list_for_each_entry(st, &tmt->tmt_sub_thandle_list, st_sub_list) {
+ if (st->st_sub_th == NULL)
+ continue;
+
+ rc = sub_declare_updates_write(env, record, st->st_sub_th,
+ tmt->tmt_record_size);
+ if (rc < 0)
+ break;
+ }
+
+ return rc;
+}
+
+/**
+ * Assign batchid to the distribute transaction.
+ *
+ * Assign batchid to the distribute transaction
+ *
+ * \param[in] tmt distribute transaction
+ */
+static void distribute_txn_assign_batchid(struct top_multiple_thandle *new)
+{
+ struct target_distribute_txn_data *tdtd;
+ struct dt_device *dt = new->tmt_master_sub_dt;
+ struct sub_thandle *st;
+
+ LASSERT(dt != NULL);
+ tdtd = dt2lu_dev(dt)->ld_site->ls_tgt->lut_tdtd;
+ spin_lock(&tdtd->tdtd_batchid_lock);
+ new->tmt_batchid = tdtd->tdtd_batchid++;
+ list_add_tail(&new->tmt_commit_list, &tdtd->tdtd_list);
+ spin_unlock(&tdtd->tdtd_batchid_lock);
+ list_for_each_entry(st, &new->tmt_sub_thandle_list, st_sub_list) {
+ if (st->st_sub_th != NULL)
+ sub_thandle_register_commit_cb(st, new);
+ }
+ top_multiple_thandle_get(new);
+ top_multiple_thandle_dump(new, D_INFO);
+}
+
+/**
+ * Insert distribute transaction to the distribute txn list.
+ *
+ * Insert distribute transaction to the distribute txn list.
+ *
+ * \param[in] new the distribute txn to be inserted.
+ */
+void distribute_txn_insert_by_batchid(struct top_multiple_thandle *new)
+{
+ struct dt_device *dt = new->tmt_master_sub_dt;
+ struct top_multiple_thandle *tmt;
+ struct target_distribute_txn_data *tdtd;
+ struct sub_thandle *st;
+ bool at_head = false;
+
+ LASSERT(dt != NULL);
+ tdtd = dt2lu_dev(dt)->ld_site->ls_tgt->lut_tdtd;
+
+ spin_lock(&tdtd->tdtd_batchid_lock);
+ list_for_each_entry_reverse(tmt, &tdtd->tdtd_list, tmt_commit_list) {
+ if (new->tmt_batchid > tmt->tmt_batchid) {
+ list_add(&new->tmt_commit_list, &tmt->tmt_commit_list);
+ break;
+ }
+ }
+ if (list_empty(&new->tmt_commit_list)) {
+ at_head = true;
+ list_add(&new->tmt_commit_list, &tdtd->tdtd_list);
+ }
+ spin_unlock(&tdtd->tdtd_batchid_lock);
+
+ list_for_each_entry(st, &new->tmt_sub_thandle_list, st_sub_list) {
+ if (st->st_sub_th != NULL)
+ sub_thandle_register_commit_cb(st, new);
+ }
+
+ top_multiple_thandle_get(new);
+ top_multiple_thandle_dump(new, D_INFO);
+ if (new->tmt_committed && at_head && tdtd->tdtd_commit_task)
+ wake_up_process(tdtd->tdtd_commit_task);
+}
+
+/**
+ * Prepare cross-MDT operation.
+ *
+ * Create the update record buffer to record updates for cross-MDT operation,
+ * add master sub transaction to tt_sub_trans_list, and declare the update
+ * writes.
+ *
+ * During updates packing, all of parameters will be packed in
+ * tur_update_params, and updates will be packed in tur_update_records.
+ * Then in transaction stop, parameters and updates will be merged
+ * into one updates buffer.
+ *
+ * And also master thandle will be added to the sub_th list, so it will be
+ * easy to track the commit status.
+ *
+ * \param[in] env execution environment
+ * \param[in] th top transaction handle
+ *
+ * \retval 0 if preparation succeeds.
+ * \retval negative errno if preparation fails.
+ */
+static int prepare_multiple_node_trans(const struct lu_env *env,
+ struct top_multiple_thandle *tmt)
+{
+ struct thandle_update_records *tur;
+ int rc;
+ ENTRY;
+
+ if (tmt->tmt_update_records == NULL) {
+ tur = &update_env_info(env)->uti_tur;
+ rc = check_and_prepare_update_record(env, tur);
+ if (rc < 0)
+ RETURN(rc);
+
+ tmt->tmt_update_records = tur;
+ distribute_txn_assign_batchid(tmt);
+ }
+
+ rc = declare_updates_write(env, tmt);
+
+ RETURN(rc);
+}
+
+/**
* start the top transaction.
*
* Start all of its sub transactions, then start master sub transaction.
{
struct top_thandle *top_th = container_of(th, struct top_thandle,
tt_super);
- struct sub_thandle *lst;
- int rc;
+ struct sub_thandle *st;
+ struct top_multiple_thandle *tmt = top_th->tt_multiple_thandle;
+ int rc = 0;
+ ENTRY;
+
+ if (tmt == NULL) {
+ if (th->th_sync)
+ top_th->tt_master_sub_thandle->th_sync = th->th_sync;
+ if (th->th_local)
+ top_th->tt_master_sub_thandle->th_local = th->th_local;
+ rc = dt_trans_start(env, top_th->tt_master_sub_thandle->th_dev,
+ top_th->tt_master_sub_thandle);
+ RETURN(rc);
+ }
- LASSERT(top_th->tt_magic == TOP_THANDLE_MAGIC);
- rc = check_and_prepare_update_record(env, th);
+ tmt = top_th->tt_multiple_thandle;
+ rc = prepare_multiple_node_trans(env, tmt);
if (rc < 0)
- return rc;
- /* Check if needs to write updates */
- list_for_each_entry(lst, &top_th->tt_sub_thandle_list, st_sub_list) {
- struct llog_update_record *record;
+ RETURN(rc);
- if (!lst->st_record_update)
+ list_for_each_entry(st, &tmt->tmt_sub_thandle_list, st_sub_list) {
+ if (st->st_sub_th == NULL)
continue;
-
- record = top_th->tt_update_records->tur_update_records;
- rc = sub_declare_updates_write(env, record, lst);
+ if (th->th_sync)
+ st->st_sub_th->th_sync = th->th_sync;
+ if (th->th_local)
+ st->st_sub_th->th_local = th->th_local;
+ rc = dt_trans_start(env, st->st_sub_th->th_dev,
+ st->st_sub_th);
if (rc != 0)
- return rc;
+ GOTO(out, rc);
+
+ LASSERT(st->st_started == 0);
+ st->st_started = 1;
}
+out:
+ th->th_result = rc;
+ RETURN(rc);
+}
+EXPORT_SYMBOL(top_trans_start);
- list_for_each_entry(lst, &top_th->tt_sub_thandle_list, st_sub_list) {
- lst->st_sub_th->th_sync = th->th_sync;
- lst->st_sub_th->th_local = th->th_local;
- rc = dt_trans_start(env, lst->st_sub_th->th_dev,
- lst->st_sub_th);
- if (rc != 0)
- return rc;
+/**
+ * Check whether we need write updates record
+ *
+ * Check if the updates for the top_thandle needs to be writen
+ * to all targets. Only if the transaction succeeds and the updates
+ * number > 2, it will write the updates,
+ *
+ * \params [in] top_th top thandle.
+ *
+ * \retval true if it needs to write updates
+ * \retval false if it does not need to write updates
+ **/
+static bool top_check_write_updates(struct top_thandle *top_th)
+{
+ struct top_multiple_thandle *tmt;
+ struct thandle_update_records *tur;
+
+ /* Do not write updates to records if the transaction fails */
+ if (top_th->tt_super.th_result != 0)
+ return false;
+
+ tmt = top_th->tt_multiple_thandle;
+ if (tmt == NULL)
+ return false;
+
+ tur = tmt->tmt_update_records;
+ if (tur == NULL)
+ return false;
+
+ /* Hmm, false update records, since the cross-MDT operation
+ * should includes both local and remote updates, so the
+ * updates count should >= 2 */
+ if (tur->tur_update_records == NULL ||
+ tur->tur_update_records->lur_update_rec.ur_update_count <= 1)
+ return false;
+
+ return true;
+}
+
+/**
+ * Check if top transaction is stopped
+ *
+ * Check if top transaction is stopped, only if all sub transaction
+ * is stopped, then the top transaction is stopped.
+ *
+ * \param [in] top_th top thandle
+ *
+ * \retval true if the top transaction is stopped.
+ * \retval false if the top transaction is not stopped.
+ */
+static bool top_trans_is_stopped(struct top_thandle *top_th)
+{
+ struct top_multiple_thandle *tmt;
+ struct sub_thandle *st;
+ bool all_stopped = true;
+
+ tmt = top_th->tt_multiple_thandle;
+ list_for_each_entry(st, &tmt->tmt_sub_thandle_list, st_sub_list) {
+ if (!st->st_stopped && st->st_sub_th != NULL) {
+ all_stopped = false;
+ break;
+ }
+
+ if (st->st_result != 0 &&
+ top_th->tt_super.th_result == 0)
+ top_th->tt_super.th_result = st->st_result;
}
- top_th->tt_master_sub_thandle->th_local = th->th_local;
- top_th->tt_master_sub_thandle->th_sync = th->th_sync;
+ return all_stopped;
+}
- return dt_trans_start(env, master_dev, top_th->tt_master_sub_thandle);
+/**
+ * Wait result of top transaction
+ *
+ * Wait until all sub transaction get its result.
+ *
+ * \param [in] top_th top thandle.
+ *
+ * \retval the result of top thandle.
+ */
+static int top_trans_wait_result(struct top_thandle *top_th)
+{
+ wait_event_idle(top_th->tt_multiple_thandle->tmt_stop_waitq,
+ top_trans_is_stopped(top_th));
+
+ RETURN(top_th->tt_super.th_result);
}
-EXPORT_SYMBOL(top_trans_start);
/**
* Stop the top transaction.
{
struct top_thandle *top_th = container_of(th, struct top_thandle,
tt_super);
- struct thandle_update_records *tur = top_th->tt_update_records;
- struct sub_thandle *lst;
- int rc;
+ struct sub_thandle *st;
+ struct sub_thandle *master_st;
+ struct top_multiple_thandle *tmt;
+ struct thandle_update_records *tur;
+ bool write_updates = false;
+ int rc = 0;
ENTRY;
- /* Note: we always need walk through all of sub_transaction to do
- * transaction stop to release the resource here */
- if (tur != NULL && th->th_result == 0) {
- rc = top_updates_write(env, top_th);
+ if (likely(top_th->tt_multiple_thandle == NULL)) {
+ LASSERT(master_dev != NULL);
+
+ if (th->th_sync)
+ top_th->tt_master_sub_thandle->th_sync = th->th_sync;
+ if (th->th_local)
+ top_th->tt_master_sub_thandle->th_local = th->th_local;
+ rc = dt_trans_stop(env, master_dev,
+ top_th->tt_master_sub_thandle);
+ OBD_FREE_PTR(top_th);
+ RETURN(rc);
+ }
+
+ tmt = top_th->tt_multiple_thandle;
+ tur = tmt->tmt_update_records;
+
+ /* Note: we need stop the master thandle first, then the stop
+ * callback will fill the master transno in the update logs,
+ * then these update logs will be sent to other MDTs */
+ /* get the master sub thandle */
+ master_st = lookup_sub_thandle(tmt, tmt->tmt_master_sub_dt);
+ write_updates = top_check_write_updates(top_th);
+
+ /* Step 1: write the updates log on Master MDT */
+ if (master_st != NULL && master_st->st_sub_th != NULL &&
+ write_updates) {
+ struct llog_update_record *lur;
+
+ /* Merge the parameters and updates into one buffer */
+ rc = prepare_writing_updates(env, tmt);
+ if (rc < 0) {
+ CERROR("%s: cannot prepare updates: rc = %d\n",
+ master_dev->dd_lu_dev.ld_obd->obd_name, rc);
+ th->th_result = rc;
+ write_updates = false;
+ GOTO(stop_master_trans, rc);
+ }
+
+ lur = tur->tur_update_records;
+ /* Write updates to the master MDT */
+ rc = sub_updates_write(env, lur, master_st);
+
+ /* Cleanup the common parameters in the update records,
+ * master transno callback might add more parameters.
+ * and we need merge the update records again in the
+ * following */
+ if (tur->tur_update_params != NULL)
+ lur->lur_update_rec.ur_param_count = 0;
+
+ if (rc < 0) {
+ CERROR("%s: write updates failed: rc = %d\n",
+ master_dev->dd_lu_dev.ld_obd->obd_name, rc);
+ th->th_result = rc;
+ write_updates = false;
+ GOTO(stop_master_trans, rc);
+ }
+ }
+
+stop_master_trans:
+ /* Step 2: Stop the transaction on the master MDT, and fill the
+ * master transno in the update logs to other MDT. */
+ if (master_st != NULL && master_st->st_sub_th != NULL) {
+ if (th->th_local)
+ master_st->st_sub_th->th_local = th->th_local;
+ if (th->th_sync)
+ master_st->st_sub_th->th_sync = th->th_sync;
+ master_st->st_sub_th->th_result = th->th_result;
+ rc = dt_trans_stop(env, master_st->st_dt, master_st->st_sub_th);
+ /* If it does not write_updates, then we call submit callback
+ * here, otherwise callback is done through
+ * osd(osp)_trans_commit_cb() */
+ if (!master_st->st_started &&
+ !list_empty(&tmt->tmt_commit_list))
+ sub_trans_commit_cb_internal(tmt,
+ master_st->st_sub_th, rc);
if (rc < 0) {
- CERROR("%s: cannot write updates: rc = %d\n",
+ CERROR("%s: stop trans failed: rc = %d\n",
master_dev->dd_lu_dev.ld_obd->obd_name, rc);
- /* Still need call dt_trans_stop to release resources
- * holding by the transaction */
+ th->th_result = rc;
+ GOTO(stop_other_trans, rc);
+ } else if (tur != NULL && tur->tur_update_records != NULL) {
+ struct llog_update_record *lur;
+
+ lur = tur->tur_update_records;
+ if (lur->lur_update_rec.ur_master_transno == 0)
+ /* Update master transno after master stop
+ * callback */
+ lur->lur_update_rec.ur_master_transno =
+ tgt_th_info(env)->tti_transno;
}
- top_th->tt_update_records = NULL;
}
- LASSERT(top_th->tt_magic == TOP_THANDLE_MAGIC);
+ /* Step 3: write updates to other MDTs */
+ if (write_updates) {
+ struct llog_update_record *lur;
+ if (OBD_FAIL_PRECHECK(OBD_FAIL_OUT_OBJECT_MISS)) {
+ if (cfs_fail_val == 1) {
+ long timeout = cfs_time_seconds(1) / 10;
- top_th->tt_master_sub_thandle->th_local = th->th_local;
- top_th->tt_master_sub_thandle->th_sync = th->th_sync;
- top_th->tt_master_sub_thandle->th_result = th->th_result;
- /* To avoid sending RPC while holding thandle, it always stop local
- * transaction first, then other sub thandle */
- rc = dt_trans_stop(env, master_dev, top_th->tt_master_sub_thandle);
+ OBD_RACE(OBD_FAIL_OUT_OBJECT_MISS);
+ set_current_state(TASK_UNINTERRUPTIBLE);
+ schedule_timeout(schedule_timeout(timeout));
+ cfs_fail_loc = 0;
+ }
+ cfs_fail_val++;
+ }
- list_for_each_entry(lst, &top_th->tt_sub_thandle_list, st_sub_list) {
- int rc2;
+ /* Stop callback of master will add more updates and also update
+ * master transno, so merge the parameters and updates into one
+ * buffer again */
+ rc = prepare_writing_updates(env, tmt);
+ if (rc < 0) {
+ CERROR("%s: prepare updates failed: rc = %d\n",
+ master_dev->dd_lu_dev.ld_obd->obd_name, rc);
+ th->th_result = rc;
+ GOTO(stop_other_trans, rc);
+ }
+ lur = tur->tur_update_records;
+ list_for_each_entry(st, &tmt->tmt_sub_thandle_list,
+ st_sub_list) {
+ if (st->st_sub_th == NULL || st == master_st ||
+ st->st_sub_th->th_result < 0)
+ continue;
- if (rc != 0)
- lst->st_sub_th->th_result = rc;
- else
- lst->st_sub_th->th_result = th->th_result;
- lst->st_sub_th->th_sync = th->th_sync;
- lst->st_sub_th->th_local = th->th_local;
- rc2 = dt_trans_stop(env, lst->st_sub_th->th_dev,
- lst->st_sub_th);
- if (unlikely(rc2 < 0 && rc == 0))
- rc = rc2;
+ rc = sub_updates_write(env, lur, st);
+ if (rc < 0) {
+ CERROR("%s: write updates failed: rc = %d\n",
+ st->st_dt->dd_lu_dev.ld_obd->obd_name,
+ rc);
+ th->th_result = rc;
+ break;
+ }
+ }
+ }
+
+stop_other_trans:
+ /* Step 4: Stop the transaction on other MDTs */
+ list_for_each_entry(st, &tmt->tmt_sub_thandle_list, st_sub_list) {
+ if (st == master_st || st->st_sub_th == NULL)
+ continue;
+
+ if (th->th_sync)
+ st->st_sub_th->th_sync = th->th_sync;
+ if (th->th_local)
+ st->st_sub_th->th_local = th->th_local;
+ st->st_sub_th->th_result = th->th_result;
+ rc = dt_trans_stop(env, st->st_sub_th->th_dev,
+ st->st_sub_th);
+ if (rc < 0) {
+ CERROR("%s: stop trans failed: rc = %d\n",
+ st->st_dt->dd_lu_dev.ld_obd->obd_name, rc);
+ if (th->th_result == 0)
+ th->th_result = rc;
+ }
}
- top_thandle_destroy(top_th);
+ rc = top_trans_wait_result(top_th);
+ tmt->tmt_result = rc;
+
+ /* Balance for the refcount in top_trans_create, Note: if it is NOT
+ * multiple node transaction, the top transaction will be destroyed. */
+ top_multiple_thandle_put(tmt);
+ OBD_FREE_PTR(top_th);
RETURN(rc);
}
EXPORT_SYMBOL(top_trans_stop);
/**
+ * Create top_multiple_thandle for top_thandle
+ *
+ * Create top_mutilple_thandle to manage the mutiple node transaction
+ * for top_thandle, and it also needs to add master sub thandle to the
+ * sub trans list now.
+ *
+ * \param[in] env execution environment
+ * \param[in] top_th the top thandle
+ *
+ * \retval 0 if creation succeeds
+ * \retval negative errno if creation fails
+ */
+int top_trans_create_tmt(const struct lu_env *env,
+ struct top_thandle *top_th)
+{
+ struct top_multiple_thandle *tmt;
+
+ OBD_ALLOC_PTR(tmt);
+ if (tmt == NULL)
+ return -ENOMEM;
+
+ tmt->tmt_magic = TOP_THANDLE_MAGIC;
+ INIT_LIST_HEAD(&tmt->tmt_sub_thandle_list);
+ INIT_LIST_HEAD(&tmt->tmt_commit_list);
+ atomic_set(&tmt->tmt_refcount, 1);
+ spin_lock_init(&tmt->tmt_sub_lock);
+ init_waitqueue_head(&tmt->tmt_stop_waitq);
+
+ top_th->tt_multiple_thandle = tmt;
+
+ return 0;
+}
+
+static struct sub_thandle *
+create_sub_thandle_with_thandle(struct top_thandle *top_th,
+ struct thandle *sub_th)
+{
+ struct sub_thandle *st;
+
+ /* create and init sub th to the top trans list */
+ st = create_sub_thandle(top_th->tt_multiple_thandle,
+ sub_th->th_dev);
+ if (IS_ERR(st))
+ return st;
+
+ st->st_sub_th = sub_th;
+
+ sub_th->th_top = &top_th->tt_super;
+ sub_thandle_register_stop_cb(st, top_th->tt_multiple_thandle);
+ return st;
+}
+
+/**
* Get sub thandle.
*
* Get sub thandle from the top thandle according to the sub dt_device.
struct thandle *th,
struct dt_device *sub_dt)
{
- struct sub_thandle *lst;
+ struct sub_thandle *st = NULL;
+ struct sub_thandle *master_st = NULL;
struct top_thandle *top_th;
- struct thandle *sub_th;
+ struct thandle *sub_th = NULL;
+ int rc = 0;
ENTRY;
top_th = container_of(th, struct top_thandle, tt_super);
- LASSERT(top_th->tt_magic == TOP_THANDLE_MAGIC);
- LASSERT(top_th->tt_master_sub_thandle != NULL);
+
if (likely(sub_dt == top_th->tt_master_sub_thandle->th_dev))
RETURN(top_th->tt_master_sub_thandle);
- /* Find or create the transaction in tt_trans_list, since there is
- * always only one thread access the list, so no need lock here */
- list_for_each_entry(lst, &top_th->tt_sub_thandle_list, st_sub_list) {
- if (lst->st_sub_th->th_dev == sub_dt)
- RETURN(lst->st_sub_th);
+ if (top_th->tt_multiple_thandle != NULL) {
+ st = lookup_sub_thandle(top_th->tt_multiple_thandle, sub_dt);
+ if (st != NULL)
+ RETURN(st->st_sub_th);
}
sub_th = dt_trans_create(env, sub_dt);
if (IS_ERR(sub_th))
RETURN(sub_th);
- /* XXX all of mixed transaction (see struct th_handle) will
- * be synchronized until async update is done */
- th->th_sync = 1;
+ /* Create top_multiple_thandle if necessary */
+ if (top_th->tt_multiple_thandle == NULL) {
+ struct top_multiple_thandle *tmt;
- sub_th->th_top = th;
- OBD_ALLOC_PTR(lst);
- if (lst == NULL) {
- dt_trans_stop(env, sub_dt, sub_th);
- RETURN(ERR_PTR(-ENOMEM));
+ rc = top_trans_create_tmt(env, top_th);
+ if (rc < 0)
+ GOTO(stop_trans, rc);
+
+ tmt = top_th->tt_multiple_thandle;
+
+ /* Add master sub th to the top trans list */
+ tmt->tmt_master_sub_dt =
+ top_th->tt_master_sub_thandle->th_dev;
+ master_st = create_sub_thandle_with_thandle(top_th,
+ top_th->tt_master_sub_thandle);
+ if (IS_ERR(master_st)) {
+ rc = PTR_ERR(master_st);
+ master_st = NULL;
+ GOTO(stop_trans, rc);
+ }
}
- INIT_LIST_HEAD(&lst->st_sub_list);
- lst->st_sub_th = sub_th;
- list_add(&lst->st_sub_list, &top_th->tt_sub_thandle_list);
- lst->st_record_update = 1;
+ /* create and init sub th to the top trans list */
+ st = create_sub_thandle_with_thandle(top_th, sub_th);
+ if (IS_ERR(st)) {
+ rc = PTR_ERR(st);
+ st = NULL;
+ GOTO(stop_trans, rc);
+ }
+ st->st_sub_th->th_wait_submit = 1;
+stop_trans:
+ if (rc < 0) {
+ if (master_st != NULL) {
+ list_del(&master_st->st_sub_list);
+ OBD_FREE_PTR(master_st);
+ }
+ sub_th->th_result = rc;
+ dt_trans_stop(env, sub_dt, sub_th);
+ sub_th = ERR_PTR(rc);
+ }
RETURN(sub_th);
}
EXPORT_SYMBOL(thandle_get_sub_by_dt);
/**
- * Top thandle destroy
+ * Top multiple thandle destroy
*
- * Destroy the top thandle and all of its sub thandle.
+ * Destroy multiple thandle and all its sub thandle.
*
- * \param[in] top_th top thandle to be destroyed.
+ * \param[in] tmt top_multiple_thandle to be destroyed.
*/
-void top_thandle_destroy(struct top_thandle *top_th)
+void top_multiple_thandle_destroy(struct top_multiple_thandle *tmt)
{
struct sub_thandle *st;
struct sub_thandle *tmp;
- LASSERT(top_th->tt_magic == TOP_THANDLE_MAGIC);
- list_for_each_entry_safe(st, tmp, &top_th->tt_sub_thandle_list,
+ LASSERT(tmt->tmt_magic == TOP_THANDLE_MAGIC);
+ list_for_each_entry_safe(st, tmp, &tmt->tmt_sub_thandle_list,
st_sub_list) {
+ struct sub_thandle_cookie *stc;
+ struct sub_thandle_cookie *tmp;
+
list_del(&st->st_sub_list);
+ list_for_each_entry_safe(stc, tmp, &st->st_cookie_list,
+ stc_list) {
+ list_del(&stc->stc_list);
+ OBD_FREE_PTR(stc);
+ }
OBD_FREE_PTR(st);
}
- OBD_FREE_PTR(top_th);
+ OBD_FREE_PTR(tmt);
+}
+EXPORT_SYMBOL(top_multiple_thandle_destroy);
+
+/**
+ * Cancel the update log on MDTs
+ *
+ * Cancel the update log on MDTs then destroy the thandle.
+ *
+ * \param[in] env execution environment
+ * \param[in] tmt the top multiple thandle whose updates records
+ * will be cancelled.
+ *
+ * \retval 0 if cancellation succeeds.
+ * \retval negative errno if cancellation fails.
+ */
+static int distribute_txn_cancel_records(const struct lu_env *env,
+ struct top_multiple_thandle *tmt)
+{
+ struct sub_thandle *st;
+ ENTRY;
+
+ if (OBD_FAIL_CHECK(OBD_FAIL_TGT_TXN_NO_CANCEL))
+ RETURN(0);
+
+ top_multiple_thandle_dump(tmt, D_INFO);
+ /* Cancel update logs on other MDTs */
+ list_for_each_entry(st, &tmt->tmt_sub_thandle_list, st_sub_list) {
+ struct llog_ctxt *ctxt;
+ struct obd_device *obd;
+ struct llog_cookie *cookie;
+ struct sub_thandle_cookie *stc;
+ int rc;
+
+ obd = st->st_dt->dd_lu_dev.ld_obd;
+ ctxt = llog_get_context(obd, LLOG_UPDATELOG_ORIG_CTXT);
+ if (ctxt == NULL)
+ continue;
+ list_for_each_entry(stc, &st->st_cookie_list, stc_list) {
+ cookie = &stc->stc_cookie;
+ if (fid_is_zero(&cookie->lgc_lgl.lgl_oi.oi_fid))
+ continue;
+
+ rc = llog_cat_cancel_records(env, ctxt->loc_handle, 1,
+ cookie);
+ CDEBUG(D_HA, "%s: batchid %llu cancel update log "
+ DFID".%u: rc = %d\n", obd->obd_name,
+ tmt->tmt_batchid,
+ PFID(&cookie->lgc_lgl.lgl_oi.oi_fid),
+ cookie->lgc_index, rc);
+ }
+
+ llog_ctxt_put(ctxt);
+ }
+
+ RETURN(0);
+}
+
+struct distribute_txn_bid_data {
+ struct dt_txn_commit_cb dtbd_cb;
+ struct target_distribute_txn_data *dtbd_tdtd;
+ __u64 dtbd_batchid;
+};
+
+/**
+ * callback of updating commit batchid
+ *
+ * Updating commit batchid then wake up the commit thread to cancel the
+ * records.
+ *
+ * \param[in]env execution environment
+ * \param[in]th thandle to updating commit batchid
+ * \param[in]cb commit callback
+ * \param[in]err result of thandle
+ */
+static void distribute_txn_batchid_cb(struct lu_env *env,
+ struct thandle *th,
+ struct dt_txn_commit_cb *cb,
+ int err)
+{
+ struct distribute_txn_bid_data *dtbd = NULL;
+ struct target_distribute_txn_data *tdtd;
+
+ dtbd = container_of(cb, struct distribute_txn_bid_data, dtbd_cb);
+ tdtd = dtbd->dtbd_tdtd;
+
+ CDEBUG(D_HA, "%s: %llu batchid updated\n",
+ tdtd->tdtd_lut->lut_obd->obd_name, dtbd->dtbd_batchid);
+ spin_lock(&tdtd->tdtd_batchid_lock);
+ if (dtbd->dtbd_batchid > tdtd->tdtd_committed_batchid &&
+ !tdtd->tdtd_lut->lut_obd->obd_no_transno)
+ tdtd->tdtd_committed_batchid = dtbd->dtbd_batchid;
+ spin_unlock(&tdtd->tdtd_batchid_lock);
+ if (atomic_dec_and_test(&tdtd->tdtd_refcount))
+ wake_up_process(tdtd->tdtd_commit_task);
+
+ OBD_FREE_PTR(dtbd);
+}
+
+/**
+ * Update the commit batchid in disk
+ *
+ * Update commit batchid in the disk, after this is committed, it can start
+ * to cancel the update records.
+ *
+ * \param[in] env execution environment
+ * \param[in] tdtd distribute transaction structure
+ * \param[in] batchid commit batchid to be updated
+ *
+ * \retval 0 if update succeeds.
+ * \retval negative errno if update fails.
+ */
+static int
+distribute_txn_commit_batchid_update(const struct lu_env *env,
+ struct target_distribute_txn_data *tdtd,
+ __u64 batchid)
+{
+ struct distribute_txn_bid_data *dtbd = NULL;
+ struct thandle *th;
+ struct lu_buf buf;
+ __u64 tmp;
+ __u64 off;
+ int rc;
+ ENTRY;
+
+ OBD_ALLOC_PTR(dtbd);
+ if (dtbd == NULL)
+ RETURN(-ENOMEM);
+ dtbd->dtbd_batchid = batchid;
+ dtbd->dtbd_tdtd = tdtd;
+ dtbd->dtbd_cb.dcb_func = distribute_txn_batchid_cb;
+ atomic_inc(&tdtd->tdtd_refcount);
+
+ th = dt_trans_create(env, tdtd->tdtd_lut->lut_bottom);
+ if (IS_ERR(th)) {
+ atomic_dec(&tdtd->tdtd_refcount);
+ OBD_FREE_PTR(dtbd);
+ RETURN(PTR_ERR(th));
+ }
+
+ tmp = cpu_to_le64(batchid);
+ buf.lb_buf = &tmp;
+ buf.lb_len = sizeof(tmp);
+ off = 0;
+
+ rc = dt_declare_record_write(env, tdtd->tdtd_batchid_obj, &buf, off,
+ th);
+ if (rc < 0)
+ GOTO(stop, rc);
+
+ rc = dt_trans_start_local(env, tdtd->tdtd_lut->lut_bottom, th);
+ if (rc < 0)
+ GOTO(stop, rc);
+
+ rc = dt_trans_cb_add(th, &dtbd->dtbd_cb);
+ if (rc < 0)
+ GOTO(stop, rc);
+
+ rc = dt_record_write(env, tdtd->tdtd_batchid_obj, &buf,
+ &off, th);
+
+ CDEBUG(D_INFO, "%s: update batchid %llu: rc = %d\n",
+ tdtd->tdtd_lut->lut_obd->obd_name, batchid, rc);
+
+stop:
+ dt_trans_stop(env, tdtd->tdtd_lut->lut_bottom, th);
+ if (rc < 0) {
+ atomic_dec(&tdtd->tdtd_refcount);
+ OBD_FREE_PTR(dtbd);
+ }
+ RETURN(rc);
+}
+
+/**
+ * Init commit batchid for distribute transaction.
+ *
+ * Initialize the batchid object and get commit batchid from the object.
+ *
+ * \param[in] env execution environment
+ * \param[in] tdtd distribute transaction whose batchid is initialized.
+ *
+ * \retval 0 if initialization succeeds.
+ * \retval negative errno if initialization fails.
+ **/
+static int
+distribute_txn_commit_batchid_init(const struct lu_env *env,
+ struct target_distribute_txn_data *tdtd)
+{
+ struct tgt_thread_info *tti = tgt_th_info(env);
+ struct lu_target *lut = tdtd->tdtd_lut;
+ struct lu_attr *attr = &tti->tti_attr;
+ struct lu_fid *fid = &tti->tti_fid1;
+ struct dt_object_format *dof = &tti->tti_u.update.tti_update_dof;
+ struct dt_object *dt_obj = NULL;
+ struct lu_buf buf;
+ __u64 tmp;
+ __u64 off;
+ int rc;
+ ENTRY;
+
+ memset(attr, 0, sizeof(*attr));
+ attr->la_valid = LA_MODE;
+ attr->la_mode = S_IFREG | S_IRUGO | S_IWUSR;
+ dof->dof_type = dt_mode_to_dft(S_IFREG);
+
+ lu_local_obj_fid(fid, BATCHID_COMMITTED_OID);
+
+ dt_obj = dt_find_or_create(env, lut->lut_bottom, fid, dof,
+ attr);
+ if (IS_ERR(dt_obj)) {
+ rc = PTR_ERR(dt_obj);
+ dt_obj = NULL;
+ GOTO(out_put, rc);
+ }
+
+ tdtd->tdtd_batchid_obj = dt_obj;
+
+ buf.lb_buf = &tmp;
+ buf.lb_len = sizeof(tmp);
+ off = 0;
+ rc = dt_read(env, dt_obj, &buf, &off);
+ if (rc < 0 || (rc < buf.lb_len && rc > 0)) {
+ CERROR("%s can't read last committed batchid: rc = %d\n",
+ tdtd->tdtd_lut->lut_obd->obd_name, rc);
+ if (rc > 0)
+ rc = -EINVAL;
+ GOTO(out_put, rc);
+ } else if (rc == buf.lb_len) {
+ tdtd->tdtd_committed_batchid = le64_to_cpu(tmp);
+ CDEBUG(D_HA, "%s: committed batchid %llu\n",
+ tdtd->tdtd_lut->lut_obd->obd_name,
+ tdtd->tdtd_committed_batchid);
+ rc = 0;
+ }
+
+out_put:
+ if (rc < 0 && dt_obj != NULL) {
+ dt_object_put(env, dt_obj);
+ tdtd->tdtd_batchid_obj = NULL;
+ }
+ return rc;
+}
+
+#ifndef TASK_IDLE
+#define TASK_IDLE TASK_INTERRUPTIBLE
+#endif
+
+/**
+ * manage the distribute transaction thread
+ *
+ * Distribute transaction are linked to the list, and once the distribute
+ * transaction is committed, it will update the last committed batchid first,
+ * after it is committed, it will cancel the records.
+ *
+ * \param[in] _arg argument for commit thread
+ *
+ * \retval 0 if thread is running successfully
+ * \retval negative errno if the thread can not be run.
+ */
+static int distribute_txn_commit_thread(void *_arg)
+{
+ struct target_distribute_txn_data *tdtd = _arg;
+ struct lu_env *env = &tdtd->tdtd_env;
+ LIST_HEAD(list);
+ int rc;
+ struct top_multiple_thandle *tmt;
+ struct top_multiple_thandle *tmp;
+ __u64 batchid = 0, committed;
+
+ ENTRY;
+
+
+ CDEBUG(D_HA, "%s: start commit thread committed batchid %llu\n",
+ tdtd->tdtd_lut->lut_obd->obd_name,
+ tdtd->tdtd_committed_batchid);
+
+ while (({set_current_state(TASK_IDLE);
+ !kthread_should_stop(); })) {
+ spin_lock(&tdtd->tdtd_batchid_lock);
+ list_for_each_entry_safe(tmt, tmp, &tdtd->tdtd_list,
+ tmt_commit_list) {
+ if (tmt->tmt_committed == 0)
+ break;
+
+ /* Note: right now, replay is based on master MDT
+ * transno, but cancellation is based on batchid.
+ * so we do not try to cancel the update log until
+ * the recoverying is done, unless the update records
+ * batchid < committed_batchid. */
+ if (tmt->tmt_batchid <= tdtd->tdtd_committed_batchid) {
+ __set_current_state(TASK_RUNNING);
+ list_move_tail(&tmt->tmt_commit_list, &list);
+ } else if (!tdtd->tdtd_lut->lut_obd->obd_recovering) {
+ __set_current_state(TASK_RUNNING);
+ LASSERTF(tmt->tmt_batchid >= batchid,
+ "tmt %p tmt_batchid: %llu, batchid "
+ "%llu\n", tmt, tmt->tmt_batchid,
+ batchid);
+ /* There are three types of distribution
+ * transaction result
+ *
+ * 1. If tmt_result < 0, it means the
+ * distribution transaction fails, which should
+ * be rare, because once declare phase succeeds,
+ * the operation should succeeds anyway. Note in
+ * this case, we will still update batchid so
+ * cancellation would be stopped.
+ *
+ * 2. If tmt_result == 0, it means the
+ * distribution transaction succeeds, and we
+ * will update batchid.
+ *
+ * 3. If tmt_result > 0, it means distribute
+ * transaction is not yet committed on every
+ * node, but we need release this tmt before
+ * that, which usuually happens during umount.
+ */
+ if (tmt->tmt_result <= 0)
+ batchid = tmt->tmt_batchid;
+ list_move_tail(&tmt->tmt_commit_list, &list);
+ }
+ }
+ spin_unlock(&tdtd->tdtd_batchid_lock);
+
+ CDEBUG(D_HA, "%s: batchid: %llu committed batchid "
+ "%llu\n", tdtd->tdtd_lut->lut_obd->obd_name, batchid,
+ tdtd->tdtd_committed_batchid);
+ /* update globally committed on a storage */
+ if (batchid > tdtd->tdtd_committed_batchid) {
+ rc = distribute_txn_commit_batchid_update(env, tdtd,
+ batchid);
+ if (rc == 0)
+ batchid = 0;
+ }
+ /* cancel the records for committed batchid's */
+ /* XXX: should we postpone cancel's till the end of recovery? */
+ committed = tdtd->tdtd_committed_batchid;
+ list_for_each_entry_safe(tmt, tmp, &list, tmt_commit_list) {
+ if (tmt->tmt_batchid > committed)
+ break;
+ __set_current_state(TASK_RUNNING);
+ list_del_init(&tmt->tmt_commit_list);
+ if (tmt->tmt_result <= 0)
+ distribute_txn_cancel_records(env, tmt);
+ top_multiple_thandle_put(tmt);
+ }
+
+ if (!task_is_running(current))
+ schedule();
+
+ if (OBD_FAIL_PRECHECK(OBD_FAIL_OUT_OBJECT_MISS)) {
+ set_current_state(TASK_UNINTERRUPTIBLE);
+ schedule_timeout(cfs_time_seconds(5));
+ }
+ }
+
+ while (({set_current_state(TASK_IDLE);
+ atomic_read(&tdtd->tdtd_refcount) != 0; }))
+ schedule();
+ __set_current_state(TASK_RUNNING);
+
+ spin_lock(&tdtd->tdtd_batchid_lock);
+ list_for_each_entry_safe(tmt, tmp, &tdtd->tdtd_list,
+ tmt_commit_list)
+ list_move_tail(&tmt->tmt_commit_list, &list);
+ spin_unlock(&tdtd->tdtd_batchid_lock);
+
+ CDEBUG(D_INFO, "%s stopping distribute txn commit thread.\n",
+ tdtd->tdtd_lut->lut_obd->obd_name);
+ list_for_each_entry_safe(tmt, tmp, &list, tmt_commit_list) {
+ list_del_init(&tmt->tmt_commit_list);
+ top_multiple_thandle_dump(tmt, D_HA);
+ top_multiple_thandle_put(tmt);
+ }
+ RETURN(0);
+}
+
+/**
+ * Start llog cancel thread
+ *
+ * Start llog cancel(master/slave) thread on LOD
+ *
+ * \param[in]lclt cancel log thread to be started.
+ *
+ * \retval 0 if the thread is started successfully.
+ * \retval negative errno if the thread is not being
+ * started.
+ */
+int distribute_txn_init(const struct lu_env *env,
+ struct lu_target *lut,
+ struct target_distribute_txn_data *tdtd,
+ __u32 index)
+{
+ struct task_struct *task;
+ int rc;
+ ENTRY;
+
+ INIT_LIST_HEAD(&tdtd->tdtd_list);
+ INIT_LIST_HEAD(&tdtd->tdtd_replay_finish_list);
+ INIT_LIST_HEAD(&tdtd->tdtd_replay_list);
+ spin_lock_init(&tdtd->tdtd_batchid_lock);
+ spin_lock_init(&tdtd->tdtd_replay_list_lock);
+ tdtd->tdtd_replay_handler = distribute_txn_replay_handle;
+ tdtd->tdtd_replay_ready = 0;
+
+ tdtd->tdtd_batchid = lut->lut_last_transno + 1;
+
+ init_waitqueue_head(&tdtd->tdtd_recovery_threads_waitq);
+ atomic_set(&tdtd->tdtd_refcount, 0);
+ atomic_set(&tdtd->tdtd_recovery_threads_count, 0);
+
+ tdtd->tdtd_lut = lut;
+ if (lut->lut_bottom->dd_rdonly)
+ RETURN(0);
+
+ rc = distribute_txn_commit_batchid_init(env, tdtd);
+ if (rc != 0)
+ RETURN(rc);
+
+ rc = lu_env_init(&tdtd->tdtd_env, LCT_LOCAL | LCT_MD_THREAD);
+ if (rc)
+ RETURN(rc);
+
+ task = kthread_create(distribute_txn_commit_thread, tdtd, "dist_txn-%u",
+ index);
+ if (IS_ERR(task)) {
+ lu_env_fini(&tdtd->tdtd_env);
+ RETURN(PTR_ERR(task));
+ }
+ tdtd->tdtd_commit_task = task;
+ wake_up_process(task);
+
+ RETURN(0);
+}
+EXPORT_SYMBOL(distribute_txn_init);
+
+/**
+ * Stop llog cancel thread
+ *
+ * Stop llog cancel(master/slave) thread on LOD and also destory
+ * all of transaction in the list.
+ *
+ * \param[in]lclt cancel log thread to be stopped.
+ */
+void distribute_txn_fini(const struct lu_env *env,
+ struct target_distribute_txn_data *tdtd)
+{
+ struct top_multiple_thandle *tmt;
+ LIST_HEAD(list);
+
+ /* Stop cancel thread */
+ if (!tdtd->tdtd_commit_task)
+ return;
+
+ kthread_stop(tdtd->tdtd_commit_task);
+ tdtd->tdtd_commit_task = NULL;
+
+ spin_lock(&tdtd->tdtd_batchid_lock);
+ list_splice_init(&tdtd->tdtd_list, &list);
+ spin_unlock(&tdtd->tdtd_batchid_lock);
+
+ CDEBUG(D_INFO, "%s stopping distribute txn commit thread.\n",
+ tdtd->tdtd_lut->lut_obd->obd_name);
+ while ((tmt = list_first_entry_or_null(&list,
+ struct top_multiple_thandle,
+ tmt_commit_list)) != NULL) {
+ list_del_init(&tmt->tmt_commit_list);
+ top_multiple_thandle_dump(tmt, D_HA);
+ top_multiple_thandle_put(tmt);
+ }
+
+ lu_env_fini(&tdtd->tdtd_env);
+
+ dtrq_list_destroy(tdtd);
+ if (tdtd->tdtd_batchid_obj != NULL) {
+ dt_object_put(env, tdtd->tdtd_batchid_obj);
+ tdtd->tdtd_batchid_obj = NULL;
+ }
}
-EXPORT_SYMBOL(top_thandle_destroy);
+EXPORT_SYMBOL(distribute_txn_fini);
git://git.whamcloud.com / fs / lustre-release.git / blobdiff